/* stb.h - v2.27 - Sean's Tool Box -- public domain -- http://nothings.org/stb.h no warranty is offered or implied; use this code at your own risk This is a single header file with a bunch of useful utilities for getting stuff done in C/C++. Documentation: http://nothings.org/stb/stb_h.html Unit tests: http://nothings.org/stb/stb.c ============================================================================ You MUST #define STB_DEFINE in EXACTLY _one_ C or C++ file that includes this header, BEFORE the include, like this: #define STB_DEFINE #include "stb.h" All other files should just #include "stb.h" without the #define. ============================================================================ Version History 2.27 test _WIN32 not WIN32 in STB_THREADS 2.26 various warning & bugfixes 2.25 various warning & bugfixes 2.24 various warning & bugfixes 2.23 fix 2.22 2.22 64-bit fixes from '!='; fix stb_sdict_copy() to have preferred name 2.21 utf-8 decoder rejects "overlong" encodings; attempted 64-bit improvements 2.20 fix to hash "copy" function--reported by someone with handle "!=" 2.19 ??? 2.18 stb_readdir_subdirs_mask 2.17 stb_cfg_dir 2.16 fix stb_bgio_, add stb_bgio_stat(); begin a streaming wrapper 2.15 upgraded hash table template to allow: - aggregate keys (explicit comparison func for EMPTY and DEL keys) - "static" implementations (so they can be culled if unused) 2.14 stb_mprintf 2.13 reduce identifiable strings in STB_NO_STB_STRINGS 2.12 fix STB_ONLY -- lots of uint32s, TRUE/FALSE things had crept in 2.11 fix bug in stb_dirtree_get() which caused "c://path" sorts of stuff 2.10 STB_F(), STB_I() inline constants (also KI,KU,KF,KD) 2.09 stb_box_face_vertex_axis_side 2.08 bugfix stb_trimwhite() 2.07 colored printing in windows (why are we in 1985?) 2.06 comparison functions are now functions-that-return-functions and accept a struct-offset as a parameter (not thread-safe) 2.05 compile and pass tests under Linux (but no threads); thread cleanup 2.04 stb_cubic_bezier_1d, smoothstep, avoid dependency on registry 2.03 ? 2.02 remove integrated documentation 2.01 integrate various fixes; stb_force_uniprocessor 2.00 revised stb_dupe to use multiple hashes 1.99 stb_charcmp 1.98 stb_arr_deleten, stb_arr_insertn 1.97 fix stb_newell_normal() 1.96 stb_hash_number() 1.95 hack stb__rec_max; clean up recursion code to use new functions 1.94 stb_dirtree; rename stb_extra to stb_ptrmap 1.93 stb_sem_new() API cleanup (no blockflag-starts blocked; use 'extra') 1.92 stb_threadqueue--multi reader/writer queue, fixed size or resizeable 1.91 stb_bgio_* for reading disk asynchronously 1.90 stb_mutex uses CRITICAL_REGION; new stb_sync primitive for thread joining; workqueue supports stb_sync instead of stb_semaphore 1.89 support ';' in constant-string wildcards; stb_mutex wrapper (can implement with EnterCriticalRegion eventually) 1.88 portable threading API (only for win32 so far); worker thread queue 1.87 fix wildcard handling in stb_readdir_recursive 1.86 support ';' in wildcards 1.85 make stb_regex work with non-constant strings; beginnings of stb_introspect() 1.84 (forgot to make notes) 1.83 whoops, stb_keep_if_different wasn't deleting the temp file 1.82 bring back stb_compress from stb_file.h for cmirror 1.81 various bugfixes, STB_FASTMALLOC_INIT inits FASTMALLOC in release 1.80 stb_readdir returns utf8; write own utf8-utf16 because lib was wrong 1.79 stb_write 1.78 calloc() support for malloc wrapper, STB_FASTMALLOC 1.77 STB_FASTMALLOC 1.76 STB_STUA - Lua-like language; (stb_image, stb_csample, stb_bilinear) 1.75 alloc/free array of blocks; stb_hheap bug; a few stb_ps_ funcs; hash*getkey, hash*copy; stb_bitset; stb_strnicmp; bugfix stb_bst 1.74 stb_replaceinplace; use stdlib C function to convert utf8 to UTF-16 1.73 fix performance bug & leak in stb_ischar (C++ port lost a 'static') 1.72 remove stb_block, stb_block_manager, stb_decompress (to stb_file.h) 1.71 stb_trimwhite, stb_tokens_nested, etc. 1.70 back out 1.69 because it might problemize mixed builds; stb_filec() 1.69 (stb_file returns 'char *' in C++) 1.68 add a special 'tree root' data type for stb_bst; stb_arr_end 1.67 full C++ port. (stb_block_manager) 1.66 stb_newell_normal 1.65 stb_lex_item_wild -- allow wildcard items which MUST match entirely 1.64 stb_data 1.63 stb_log_name 1.62 stb_define_sort; C++ cleanup 1.61 stb_hash_fast -- Paul Hsieh's hash function (beats Bob Jenkins'?) 1.60 stb_delete_directory_recursive 1.59 stb_readdir_recursive 1.58 stb_bst variant with parent pointer for O(1) iteration, not O(log N) 1.57 replace LCG random with Mersenne Twister (found a public domain one) 1.56 stb_perfect_hash, stb_ischar, stb_regex 1.55 new stb_bst API allows multiple BSTs per node (e.g. secondary keys) 1.54 bugfix: stb_define_hash, stb_wildmatch, regexp 1.53 stb_define_hash; recoded stb_extra, stb_sdict use it 1.52 stb_rand_define, stb_bst, stb_reverse 1.51 fix 'stb_arr_setlen(NULL, 0)' 1.50 stb_wordwrap 1.49 minor improvements to enable the scripting language 1.48 better approach for stb_arr using stb_malloc; more invasive, clearer 1.47 stb_lex (lexes stb.h at 1.5ML/s on 3Ghz P4; 60/70% of optimal/flex) 1.46 stb_wrapper_*, STB_MALLOC_WRAPPER 1.45 lightly tested DFA acceleration of regexp searching 1.44 wildcard matching & searching; regexp matching & searching 1.43 stb_temp 1.42 allow stb_arr to use stb_malloc/realloc; note this is global 1.41 make it compile in C++; (disable stb_arr in C++) 1.40 stb_dupe tweak; stb_swap; stb_substr 1.39 stb_dupe; improve stb_file_max to be less stupid 1.38 stb_sha1_file: generate sha1 for file, even > 4GB 1.37 stb_file_max; partial support for utf8 filenames in Windows 1.36 remove STB__NO_PREFIX - poor interaction with IDE, not worth it streamline stb_arr to make it separately publishable 1.35 bugfixes for stb_sdict, stb_malloc(0), stristr 1.34 (streaming interfaces for stb_compress) 1.33 stb_alloc; bug in stb_getopt; remove stb_overflow 1.32 (stb_compress returns, smaller&faster; encode window & 64-bit len) 1.31 stb_prefix_count 1.30 (STB__NO_PREFIX - remove stb_ prefixes for personal projects) 1.29 stb_fput_varlen64, etc. 1.28 stb_sha1 1.27 ? 1.26 stb_extra 1.25 ? 1.24 stb_copyfile 1.23 stb_readdir 1.22 ? 1.21 ? 1.20 ? 1.19 ? 1.18 ? 1.17 ? 1.16 ? 1.15 stb_fixpath, stb_splitpath, stb_strchr2 1.14 stb_arr 1.13 ?stb, stb_log, stb_fatal 1.12 ?stb_hash2 1.11 miniML 1.10 stb_crc32, stb_adler32 1.09 stb_sdict 1.08 stb_bitreverse, stb_ispow2, stb_big32 stb_fopen, stb_fput_varlen, stb_fput_ranged stb_fcmp, stb_feq 1.07 (stb_encompress) 1.06 stb_compress 1.05 stb_tokens, (stb_hheap) 1.04 stb_rand 1.03 ?(s-strings) 1.02 ?stb_filelen, stb_tokens 1.01 stb_tolower 1.00 stb_hash, stb_intcmp stb_file, stb_stringfile, stb_fgets stb_prefix, stb_strlower, stb_strtok stb_image (stb_array), (stb_arena) Parenthesized items have since been removed. LICENSE This software is dual-licensed to the public domain and under the following license: you are granted a perpetual, irrevocable license to copy, modify, publish, and distribute this file as you see fit. CREDITS Written by Sean Barrett. Fixes: Philipp Wiesemann Robert Nix r-lyeh blackpawn Mojofreem@github Ryan Whitworth Vincent Isambart Mike Sartain Eugene Opalev Tim Sjostrand */ #ifndef STB__INCLUDE_STB_H #define STB__INCLUDE_STB_H #define STB_VERSION 1 #ifdef STB_INTROSPECT #define STB_DEFINE #endif #ifdef STB_DEFINE_THREADS #ifndef STB_DEFINE #define STB_DEFINE #endif #ifndef STB_THREADS #define STB_THREADS #endif #endif #if defined(_WIN32) && !defined(__MINGW32__) #ifndef _CRT_SECURE_NO_WARNINGS #define _CRT_SECURE_NO_WARNINGS #endif #ifndef _CRT_NONSTDC_NO_DEPRECATE #define _CRT_NONSTDC_NO_DEPRECATE #endif #ifndef _CRT_NON_CONFORMING_SWPRINTFS #define _CRT_NON_CONFORMING_SWPRINTFS #endif #if !defined(_MSC_VER) || _MSC_VER > 1700 #include // _BitScanReverse #endif #endif #include // stdlib could have min/max #include // need FILE #include // stb_define_hash needs memcpy/memset #include // stb_dirtree #ifdef __MINGW32__ #include // O_RDWR #endif #ifdef STB_PERSONAL typedef int Bool; #define False 0 #define True 1 #endif #ifdef STB_MALLOC_WRAPPER_PAGED #define STB_MALLOC_WRAPPER_DEBUG #endif #ifdef STB_MALLOC_WRAPPER_DEBUG #define STB_MALLOC_WRAPPER #endif #ifdef STB_MALLOC_WRAPPER_FASTMALLOC #define STB_FASTMALLOC #define STB_MALLOC_WRAPPER #endif #ifdef STB_FASTMALLOC #ifndef _WIN32 #undef STB_FASTMALLOC #endif #endif #ifdef STB_DEFINE #include #include #include #include #include #ifndef _WIN32 #include #else #include // _mktemp #include // _rmdir #endif #include // stat()/_stat() #include // stat()/_stat() #endif #define stb_min(a,b) ((a) < (b) ? (a) : (b)) #define stb_max(a,b) ((a) > (b) ? (a) : (b)) #ifndef STB_ONLY #if !defined(__cplusplus) && !defined(min) && !defined(max) #define min(x,y) stb_min(x,y) #define max(x,y) stb_max(x,y) #endif #ifndef M_PI #define M_PI 3.14159265358979323846f #endif #ifndef TRUE #define TRUE 1 #define FALSE 0 #endif #ifndef deg2rad #define deg2rad(a) ((a)*(M_PI/180)) #endif #ifndef rad2deg #define rad2deg(a) ((a)*(180/M_PI)) #endif #ifndef swap #ifndef __cplusplus #define swap(TYPE,a,b) \ do { TYPE stb__t; stb__t = (a); (a) = (b); (b) = stb__t; } while (0) #endif #endif typedef unsigned char uint8 ; typedef signed char int8 ; typedef unsigned short uint16; typedef signed short int16; #if defined(STB_USE_LONG_FOR_32_BIT_INT) || defined(STB_LONG32) typedef unsigned long uint32; typedef signed long int32; #else typedef unsigned int uint32; typedef signed int int32; #endif typedef unsigned char uchar ; typedef unsigned short ushort; typedef unsigned int uint ; typedef unsigned long ulong ; // produce compile errors if the sizes aren't right typedef char stb__testsize16[sizeof(int16)==2]; typedef char stb__testsize32[sizeof(int32)==4]; #endif #ifndef STB_TRUE #define STB_TRUE 1 #define STB_FALSE 0 #endif // if we're STB_ONLY, can't rely on uint32 or even uint, so all the // variables we'll use herein need typenames prefixed with 'stb': typedef unsigned char stb_uchar; typedef unsigned char stb_uint8; typedef unsigned int stb_uint; typedef unsigned short stb_uint16; typedef short stb_int16; typedef signed char stb_int8; #if defined(STB_USE_LONG_FOR_32_BIT_INT) || defined(STB_LONG32) typedef unsigned long stb_uint32; typedef long stb_int32; #else typedef unsigned int stb_uint32; typedef int stb_int32; #endif typedef char stb__testsize2_16[sizeof(stb_uint16)==2 ? 1 : -1]; typedef char stb__testsize2_32[sizeof(stb_uint32)==4 ? 1 : -1]; #ifdef _MSC_VER typedef unsigned __int64 stb_uint64; typedef __int64 stb_int64; #define STB_IMM_UINT64(literalui64) (literalui64##ui64) #define STB_IMM_INT64(literali64) (literali64##i64) #else // ?? typedef unsigned long long stb_uint64; typedef long long stb_int64; #define STB_IMM_UINT64(literalui64) (literalui64##ULL) #define STB_IMM_INT64(literali64) (literali64##LL) #endif typedef char stb__testsize2_64[sizeof(stb_uint64)==8 ? 1 : -1]; // add platform-specific ways of checking for sizeof(char*) == 8, // and make those define STB_PTR64 #if defined(_WIN64) || defined(__x86_64__) || defined(__ia64__) || defined(__LP64__) #define STB_PTR64 #endif #ifdef STB_PTR64 typedef char stb__testsize2_ptr[sizeof(char *) == 8]; typedef stb_uint64 stb_uinta; typedef stb_int64 stb_inta; #else typedef char stb__testsize2_ptr[sizeof(char *) == 4]; typedef stb_uint32 stb_uinta; typedef stb_int32 stb_inta; #endif typedef char stb__testsize2_uinta[sizeof(stb_uinta)==sizeof(char*) ? 1 : -1]; // if so, we should define an int type that is the pointer size. until then, // we'll have to make do with this (which is not the same at all!) typedef union { unsigned int i; void * p; } stb_uintptr; #ifdef __cplusplus #define STB_EXTERN extern "C" #else #define STB_EXTERN extern #endif // check for well-known debug defines #if defined(DEBUG) || defined(_DEBUG) || defined(DBG) #ifndef NDEBUG #define STB_DEBUG #endif #endif #ifdef STB_DEBUG #include #endif STB_EXTERN void stb_wrapper_malloc(void *newp, int sz, char *file, int line); STB_EXTERN void stb_wrapper_free(void *oldp, char *file, int line); STB_EXTERN void stb_wrapper_realloc(void *oldp, void *newp, int sz, char *file, int line); STB_EXTERN void stb_wrapper_calloc(size_t num, size_t sz, char *file, int line); STB_EXTERN void stb_wrapper_listall(void (*func)(void *ptr, int sz, char *file, int line)); STB_EXTERN void stb_wrapper_dump(char *filename); STB_EXTERN int stb_wrapper_allocsize(void *oldp); STB_EXTERN void stb_wrapper_check(void *oldp); #ifdef STB_DEFINE // this is a special function used inside malloc wrapper // to do allocations that aren't tracked (to avoid // reentrancy). Of course if someone _else_ wraps realloc, // this breaks, but if they're doing that AND the malloc // wrapper they need to explicitly check for reentrancy. // // only define realloc_raw() and we do realloc(NULL,sz) // for malloc() and realloc(p,0) for free(). static void * stb__realloc_raw(void *p, int sz) { if (p == NULL) return malloc(sz); if (sz == 0) { free(p); return NULL; } return realloc(p,sz); } #endif #ifdef _WIN32 STB_EXTERN void * stb_smalloc(size_t sz); STB_EXTERN void stb_sfree(void *p); STB_EXTERN void * stb_srealloc(void *p, size_t sz); STB_EXTERN void * stb_scalloc(size_t n, size_t sz); STB_EXTERN char * stb_sstrdup(char *s); #endif #ifdef STB_FASTMALLOC #define malloc stb_smalloc #define free stb_sfree #define realloc stb_srealloc #define strdup stb_sstrdup #define calloc stb_scalloc #endif #ifndef STB_MALLOC_ALLCHECK #define stb__check(p) 1 #else #ifndef STB_MALLOC_WRAPPER #error STB_MALLOC_ALLCHECK requires STB_MALLOC_WRAPPER #else #define stb__check(p) stb_mcheck(p) #endif #endif #ifdef STB_MALLOC_WRAPPER STB_EXTERN void * stb__malloc(int, char *, int); STB_EXTERN void * stb__realloc(void *, int, char *, int); STB_EXTERN void * stb__calloc(size_t n, size_t s, char *, int); STB_EXTERN void stb__free(void *, char *file, int); STB_EXTERN char * stb__strdup(char *s, char *file, int); STB_EXTERN void stb_malloc_checkall(void); STB_EXTERN void stb_malloc_check_counter(int init_delay, int rep_delay); #ifndef STB_MALLOC_WRAPPER_DEBUG #define stb_mcheck(p) 1 #else STB_EXTERN int stb_mcheck(void *); #endif #ifdef STB_DEFINE #ifdef STB_MALLOC_WRAPPER_DEBUG #define STB__PAD 32 #define STB__BIAS 16 #define STB__SIG 0x51b01234 #define STB__FIXSIZE(sz) (((sz+3) & ~3) + STB__PAD) #define STB__ptr(x,y) ((char *) (x) + (y)) #else #define STB__ptr(x,y) (x) #define STB__FIXSIZE(sz) (sz) #endif #ifdef STB_MALLOC_WRAPPER_DEBUG int stb_mcheck(void *p) { unsigned int sz; if (p == NULL) return 1; p = ((char *) p) - STB__BIAS; sz = * (unsigned int *) p; assert(* (unsigned int *) STB__ptr(p,4) == STB__SIG); assert(* (unsigned int *) STB__ptr(p,8) == STB__SIG); assert(* (unsigned int *) STB__ptr(p,12) == STB__SIG); assert(* (unsigned int *) STB__ptr(p,sz-4) == STB__SIG+1); assert(* (unsigned int *) STB__ptr(p,sz-8) == STB__SIG+1); assert(* (unsigned int *) STB__ptr(p,sz-12) == STB__SIG+1); assert(* (unsigned int *) STB__ptr(p,sz-16) == STB__SIG+1); stb_wrapper_check(STB__ptr(p, STB__BIAS)); return 1; } static void stb__check2(void *p, int sz, char *file, int line) { stb_mcheck(p); } void stb_malloc_checkall(void) { stb_wrapper_listall(stb__check2); } #else void stb_malloc_checkall(void) { } #endif static int stb__malloc_wait=(1 << 30), stb__malloc_next_wait = (1 << 30), stb__malloc_iter; void stb_malloc_check_counter(int init_delay, int rep_delay) { stb__malloc_wait = init_delay; stb__malloc_next_wait = rep_delay; } void stb_mcheck_all(void) { #ifdef STB_MALLOC_WRAPPER_DEBUG ++stb__malloc_iter; if (--stb__malloc_wait <= 0) { stb_malloc_checkall(); stb__malloc_wait = stb__malloc_next_wait; } #endif } #ifdef STB_MALLOC_WRAPPER_PAGED #define STB__WINDOWS_PAGE (1 << 12) #ifndef _WINDOWS_ STB_EXTERN __declspec(dllimport) void * __stdcall VirtualAlloc(void *p, unsigned long size, unsigned long type, unsigned long protect); STB_EXTERN __declspec(dllimport) int __stdcall VirtualFree(void *p, unsigned long size, unsigned long freetype); #endif #endif static void *stb__malloc_final(int sz) { #ifdef STB_MALLOC_WRAPPER_PAGED int aligned = (sz + STB__WINDOWS_PAGE - 1) & ~(STB__WINDOWS_PAGE-1); char *p = VirtualAlloc(NULL, aligned + STB__WINDOWS_PAGE, 0x2000, 0x04); // RESERVE, READWRITE if (p == NULL) return p; VirtualAlloc(p, aligned, 0x1000, 0x04); // COMMIT, READWRITE return p; #else return malloc(sz); #endif } static void stb__free_final(void *p) { #ifdef STB_MALLOC_WRAPPER_PAGED VirtualFree(p, 0, 0x8000); // RELEASE #else free(p); #endif } int stb__malloc_failure; static void *stb__realloc_final(void *p, int sz, int old_sz) { #ifdef STB_MALLOC_WRAPPER_PAGED void *q = stb__malloc_final(sz); if (q == NULL) return ++stb__malloc_failure, q; // @TODO: deal with p being smaller! memcpy(q, p, sz < old_sz ? sz : old_sz); stb__free_final(p); return q; #else return realloc(p,sz); #endif } void stb__free(void *p, char *file, int line) { stb_mcheck_all(); if (!p) return; #ifdef STB_MALLOC_WRAPPER_DEBUG stb_mcheck(p); #endif stb_wrapper_free(p,file,line); #ifdef STB_MALLOC_WRAPPER_DEBUG p = STB__ptr(p,-STB__BIAS); * (unsigned int *) STB__ptr(p,0) = 0xdeadbeef; * (unsigned int *) STB__ptr(p,4) = 0xdeadbeef; * (unsigned int *) STB__ptr(p,8) = 0xdeadbeef; * (unsigned int *) STB__ptr(p,12) = 0xdeadbeef; #endif stb__free_final(p); } void * stb__malloc(int sz, char *file, int line) { void *p; stb_mcheck_all(); if (sz == 0) return NULL; p = stb__malloc_final(STB__FIXSIZE(sz)); if (p == NULL) p = stb__malloc_final(STB__FIXSIZE(sz)); if (p == NULL) p = stb__malloc_final(STB__FIXSIZE(sz)); if (p == NULL) { ++stb__malloc_failure; #ifdef STB_MALLOC_WRAPPER_DEBUG stb_malloc_checkall(); #endif return p; } #ifdef STB_MALLOC_WRAPPER_DEBUG * (int *) STB__ptr(p,0) = STB__FIXSIZE(sz); * (unsigned int *) STB__ptr(p,4) = STB__SIG; * (unsigned int *) STB__ptr(p,8) = STB__SIG; * (unsigned int *) STB__ptr(p,12) = STB__SIG; * (unsigned int *) STB__ptr(p,STB__FIXSIZE(sz)-4) = STB__SIG+1; * (unsigned int *) STB__ptr(p,STB__FIXSIZE(sz)-8) = STB__SIG+1; * (unsigned int *) STB__ptr(p,STB__FIXSIZE(sz)-12) = STB__SIG+1; * (unsigned int *) STB__ptr(p,STB__FIXSIZE(sz)-16) = STB__SIG+1; p = STB__ptr(p, STB__BIAS); #endif stb_wrapper_malloc(p,sz,file,line); return p; } void * stb__realloc(void *p, int sz, char *file, int line) { void *q; stb_mcheck_all(); if (p == NULL) return stb__malloc(sz,file,line); if (sz == 0 ) { stb__free(p,file,line); return NULL; } #ifdef STB_MALLOC_WRAPPER_DEBUG stb_mcheck(p); p = STB__ptr(p,-STB__BIAS); #endif #ifdef STB_MALLOC_WRAPPER_PAGED { int n = stb_wrapper_allocsize(STB__ptr(p,STB__BIAS)); if (!n) stb_wrapper_check(STB__ptr(p,STB__BIAS)); q = stb__realloc_final(p, STB__FIXSIZE(sz), STB__FIXSIZE(n)); } #else q = realloc(p, STB__FIXSIZE(sz)); #endif if (q == NULL) return ++stb__malloc_failure, q; #ifdef STB_MALLOC_WRAPPER_DEBUG * (int *) STB__ptr(q,0) = STB__FIXSIZE(sz); * (unsigned int *) STB__ptr(q,4) = STB__SIG; * (unsigned int *) STB__ptr(q,8) = STB__SIG; * (unsigned int *) STB__ptr(q,12) = STB__SIG; * (unsigned int *) STB__ptr(q,STB__FIXSIZE(sz)-4) = STB__SIG+1; * (unsigned int *) STB__ptr(q,STB__FIXSIZE(sz)-8) = STB__SIG+1; * (unsigned int *) STB__ptr(q,STB__FIXSIZE(sz)-12) = STB__SIG+1; * (unsigned int *) STB__ptr(q,STB__FIXSIZE(sz)-16) = STB__SIG+1; q = STB__ptr(q, STB__BIAS); p = STB__ptr(p, STB__BIAS); #endif stb_wrapper_realloc(p,q,sz,file,line); return q; } STB_EXTERN int stb_log2_ceil(unsigned int); static void *stb__calloc(size_t n, size_t sz, char *file, int line) { void *q; stb_mcheck_all(); if (n == 0 || sz == 0) return NULL; if (stb_log2_ceil(n) + stb_log2_ceil(sz) >= 32) return NULL; q = stb__malloc(n*sz, file, line); if (q) memset(q, 0, n*sz); return q; } char * stb__strdup(char *s, char *file, int line) { char *p; stb_mcheck_all(); p = stb__malloc(strlen(s)+1, file, line); if (!p) return p; strcpy(p, s); return p; } #endif // STB_DEFINE #ifdef STB_FASTMALLOC #undef malloc #undef realloc #undef free #undef strdup #undef calloc #endif // include everything that might define these, BEFORE making macros #include #include #include #define malloc(s) stb__malloc ( s, __FILE__, __LINE__) #define realloc(p,s) stb__realloc(p,s, __FILE__, __LINE__) #define calloc(n,s) stb__calloc (n,s, __FILE__, __LINE__) #define free(p) stb__free (p, __FILE__, __LINE__) #define strdup(p) stb__strdup (p, __FILE__, __LINE__) #endif ////////////////////////////////////////////////////////////////////////////// // // Windows pretty display // STB_EXTERN void stbprint(const char *fmt, ...); STB_EXTERN char *stb_sprintf(const char *fmt, ...); STB_EXTERN char *stb_mprintf(const char *fmt, ...); STB_EXTERN int stb_snprintf(char *s, size_t n, const char *fmt, ...); STB_EXTERN int stb_vsnprintf(char *s, size_t n, const char *fmt, va_list v); #ifdef STB_DEFINE int stb_vsnprintf(char *s, size_t n, const char *fmt, va_list v) { int res; #ifdef _WIN32 // Could use "_vsnprintf_s(s, n, _TRUNCATE, fmt, v)" ? res = _vsnprintf(s,n,fmt,v); #else res = vsnprintf(s,n,fmt,v); #endif if (n) s[n-1] = 0; // Unix returns length output would require, Windows returns negative when truncated. return (res >= (int) n || res < 0) ? -1 : res; } int stb_snprintf(char *s, size_t n, const char *fmt, ...) { int res; va_list v; va_start(v,fmt); res = stb_vsnprintf(s, n, fmt, v); va_end(v); return res; } char *stb_sprintf(const char *fmt, ...) { static char buffer[1024]; va_list v; va_start(v,fmt); stb_vsnprintf(buffer,1024,fmt,v); va_end(v); return buffer; } char *stb_mprintf(const char *fmt, ...) { static char buffer[1024]; va_list v; va_start(v,fmt); stb_vsnprintf(buffer,1024,fmt,v); va_end(v); return strdup(buffer); } #ifdef _WIN32 #ifndef _WINDOWS_ STB_EXTERN __declspec(dllimport) int __stdcall WriteConsoleA(void *, const void *, unsigned int, unsigned int *, void *); STB_EXTERN __declspec(dllimport) void * __stdcall GetStdHandle(unsigned int); STB_EXTERN __declspec(dllimport) int __stdcall SetConsoleTextAttribute(void *, unsigned short); #endif static void stb__print_one(void *handle, char *s, int len) { if (len) if (WriteConsoleA(handle, s, len, NULL,NULL)) fwrite(s, 1, len, stdout); // if it fails, maybe redirected, so do normal } static void stb__print(char *s) { void *handle = GetStdHandle((unsigned int) -11); // STD_OUTPUT_HANDLE int pad=0; // number of padding characters to add char *t = s; while (*s) { int lpad; while (*s && *s != '{') { if (pad) { if (*s == '\r' || *s == '\n') pad = 0; else if (s[0] == ' ' && s[1] == ' ') { stb__print_one(handle, t, s-t); t = s; while (pad) { stb__print_one(handle, t, 1); --pad; } } } ++s; } if (!*s) break; stb__print_one(handle, t, s-t); if (s[1] == '{') { ++s; continue; } if (s[1] == '#') { t = s+3; if (isxdigit(s[2])) if (isdigit(s[2])) SetConsoleTextAttribute(handle, s[2] - '0'); else SetConsoleTextAttribute(handle, tolower(s[2]) - 'a' + 10); else { SetConsoleTextAttribute(handle, 0x0f); t=s+2; } } else if (s[1] == '!') { SetConsoleTextAttribute(handle, 0x0c); t = s+2; } else if (s[1] == '@') { SetConsoleTextAttribute(handle, 0x09); t = s+2; } else if (s[1] == '$') { SetConsoleTextAttribute(handle, 0x0a); t = s+2; } else { SetConsoleTextAttribute(handle, 0x08); // 0,7,8,15 => shades of grey t = s+1; } lpad = (t-s); s = t; while (*s && *s != '}') ++s; if (!*s) break; stb__print_one(handle, t, s-t); if (s[1] == '}') { t = s+2; } else { pad += 1+lpad; t = s+1; } s=t; SetConsoleTextAttribute(handle, 0x07); } stb__print_one(handle, t, s-t); SetConsoleTextAttribute(handle, 0x07); } void stbprint(const char *fmt, ...) { int res; char buffer[1024]; char *tbuf = buffer; va_list v; va_start(v,fmt); res = stb_vsnprintf(buffer, sizeof(buffer), fmt, v); va_end(v); if (res < 0) { tbuf = (char *) malloc(16384); va_start(v,fmt); res = _vsnprintf(tbuf,16384, fmt, v); va_end(v); tbuf[16383] = 0; } stb__print(tbuf); if (tbuf != buffer) free(tbuf); } #else // _WIN32 void stbprint(const char *fmt, ...) { va_list v; va_start(v,fmt); vprintf(fmt,v); va_end(v); } #endif // _WIN32 #endif // STB_DEFINE ////////////////////////////////////////////////////////////////////////////// // // Windows UTF8 filename handling // // Windows stupidly treats 8-bit filenames as some dopey code page, // rather than utf-8. If we want to use utf8 filenames, we have to // convert them to WCHAR explicitly and call WCHAR versions of the // file functions. So, ok, we do. #ifdef _WIN32 #define stb__fopen(x,y) _wfopen((const wchar_t *)stb__from_utf8(x), (const wchar_t *)stb__from_utf8_alt(y)) #define stb__windows(x,y) x #else #define stb__fopen(x,y) fopen(x,y) #define stb__windows(x,y) y #endif typedef unsigned short stb__wchar; STB_EXTERN stb__wchar * stb_from_utf8(stb__wchar *buffer, char *str, int n); STB_EXTERN char * stb_to_utf8 (char *buffer, stb__wchar *str, int n); STB_EXTERN stb__wchar *stb__from_utf8(char *str); STB_EXTERN stb__wchar *stb__from_utf8_alt(char *str); STB_EXTERN char *stb__to_utf8(stb__wchar *str); #ifdef STB_DEFINE stb__wchar * stb_from_utf8(stb__wchar *buffer, char *ostr, int n) { unsigned char *str = (unsigned char *) ostr; stb_uint32 c; int i=0; --n; while (*str) { if (i >= n) return NULL; if (!(*str & 0x80)) buffer[i++] = *str++; else if ((*str & 0xe0) == 0xc0) { if (*str < 0xc2) return NULL; c = (*str++ & 0x1f) << 6; if ((*str & 0xc0) != 0x80) return NULL; buffer[i++] = c + (*str++ & 0x3f); } else if ((*str & 0xf0) == 0xe0) { if (*str == 0xe0 && (str[1] < 0xa0 || str[1] > 0xbf)) return NULL; if (*str == 0xed && str[1] > 0x9f) return NULL; // str[1] < 0x80 is checked below c = (*str++ & 0x0f) << 12; if ((*str & 0xc0) != 0x80) return NULL; c += (*str++ & 0x3f) << 6; if ((*str & 0xc0) != 0x80) return NULL; buffer[i++] = c + (*str++ & 0x3f); } else if ((*str & 0xf8) == 0xf0) { if (*str > 0xf4) return NULL; if (*str == 0xf0 && (str[1] < 0x90 || str[1] > 0xbf)) return NULL; if (*str == 0xf4 && str[1] > 0x8f) return NULL; // str[1] < 0x80 is checked below c = (*str++ & 0x07) << 18; if ((*str & 0xc0) != 0x80) return NULL; c += (*str++ & 0x3f) << 12; if ((*str & 0xc0) != 0x80) return NULL; c += (*str++ & 0x3f) << 6; if ((*str & 0xc0) != 0x80) return NULL; c += (*str++ & 0x3f); // utf-8 encodings of values used in surrogate pairs are invalid if ((c & 0xFFFFF800) == 0xD800) return NULL; if (c >= 0x10000) { c -= 0x10000; if (i + 2 > n) return NULL; buffer[i++] = 0xD800 | (0x3ff & (c >> 10)); buffer[i++] = 0xDC00 | (0x3ff & (c )); } } else return NULL; } buffer[i] = 0; return buffer; } char * stb_to_utf8(char *buffer, stb__wchar *str, int n) { int i=0; --n; while (*str) { if (*str < 0x80) { if (i+1 > n) return NULL; buffer[i++] = (char) *str++; } else if (*str < 0x800) { if (i+2 > n) return NULL; buffer[i++] = 0xc0 + (*str >> 6); buffer[i++] = 0x80 + (*str & 0x3f); str += 1; } else if (*str >= 0xd800 && *str < 0xdc00) { stb_uint32 c; if (i+4 > n) return NULL; c = ((str[0] - 0xd800) << 10) + ((str[1]) - 0xdc00) + 0x10000; buffer[i++] = 0xf0 + (c >> 18); buffer[i++] = 0x80 + ((c >> 12) & 0x3f); buffer[i++] = 0x80 + ((c >> 6) & 0x3f); buffer[i++] = 0x80 + ((c ) & 0x3f); str += 2; } else if (*str >= 0xdc00 && *str < 0xe000) { return NULL; } else { if (i+3 > n) return NULL; buffer[i++] = 0xe0 + (*str >> 12); buffer[i++] = 0x80 + ((*str >> 6) & 0x3f); buffer[i++] = 0x80 + ((*str ) & 0x3f); str += 1; } } buffer[i] = 0; return buffer; } stb__wchar *stb__from_utf8(char *str) { static stb__wchar buffer[4096]; return stb_from_utf8(buffer, str, 4096); } stb__wchar *stb__from_utf8_alt(char *str) { static stb__wchar buffer[64]; return stb_from_utf8(buffer, str, 64); } char *stb__to_utf8(stb__wchar *str) { static char buffer[4096]; return stb_to_utf8(buffer, str, 4096); } #endif ////////////////////////////////////////////////////////////////////////////// // // Miscellany // STB_EXTERN void stb_fatal(char *fmt, ...); STB_EXTERN void stb_(char *fmt, ...); STB_EXTERN void stb_append_to_file(char *file, char *fmt, ...); STB_EXTERN void stb_log(int active); STB_EXTERN void stb_log_fileline(int active); STB_EXTERN void stb_log_name(char *filename); STB_EXTERN void stb_swap(void *p, void *q, size_t sz); STB_EXTERN void *stb_copy(void *p, size_t sz); STB_EXTERN void stb_pointer_array_free(void *p, int len); STB_EXTERN void **stb_array_block_alloc(int count, int blocksize); #define stb_arrcount(x) (sizeof(x)/sizeof((x)[0])) STB_EXTERN int stb__record_fileline(char *f, int n); #ifdef STB_DEFINE static char *stb__file; static int stb__line; int stb__record_fileline(char *f, int n) { stb__file = f; stb__line = n; return 0; } void stb_fatal(char *s, ...) { va_list a; if (stb__file) fprintf(stderr, "[%s:%d] ", stb__file, stb__line); va_start(a,s); fputs("Fatal error: ", stderr); vfprintf(stderr, s, a); va_end(a); fputs("\n", stderr); #ifdef STB_DEBUG #ifdef _MSC_VER #ifndef STB_PTR64 __asm int 3; // trap to debugger! #else __debugbreak(); #endif #else __builtin_trap(); #endif #endif exit(1); } static int stb__log_active=1, stb__log_fileline=1; void stb_log(int active) { stb__log_active = active; } void stb_log_fileline(int active) { stb__log_fileline = active; } #ifdef STB_NO_STB_STRINGS char *stb__log_filename = "temp.log"; #else char *stb__log_filename = "stb.log"; #endif void stb_log_name(char *s) { stb__log_filename = s; } void stb_(char *s, ...) { if (stb__log_active) { FILE *f = fopen(stb__log_filename, "a"); if (f) { va_list a; if (stb__log_fileline && stb__file) fprintf(f, "[%s:%4d] ", stb__file, stb__line); va_start(a,s); vfprintf(f, s, a); va_end(a); fputs("\n", f); fclose(f); } } } void stb_append_to_file(char *filename, char *s, ...) { FILE *f = fopen(filename, "a"); if (f) { va_list a; va_start(a,s); vfprintf(f, s, a); va_end(a); fputs("\n", f); fclose(f); } } typedef struct { char d[4]; } stb__4; typedef struct { char d[8]; } stb__8; // optimize the small cases, though you shouldn't be calling this for those! void stb_swap(void *p, void *q, size_t sz) { char buffer[256]; if (p == q) return; if (sz == 4) { stb__4 temp = * ( stb__4 *) p; * (stb__4 *) p = * ( stb__4 *) q; * (stb__4 *) q = temp; return; } else if (sz == 8) { stb__8 temp = * ( stb__8 *) p; * (stb__8 *) p = * ( stb__8 *) q; * (stb__8 *) q = temp; return; } while (sz > sizeof(buffer)) { stb_swap(p, q, sizeof(buffer)); p = (char *) p + sizeof(buffer); q = (char *) q + sizeof(buffer); sz -= sizeof(buffer); } memcpy(buffer, p , sz); memcpy(p , q , sz); memcpy(q , buffer, sz); } void *stb_copy(void *p, size_t sz) { void *q = malloc(sz); memcpy(q, p, sz); return q; } void stb_pointer_array_free(void *q, int len) { void **p = (void **) q; int i; for (i=0; i < len; ++i) free(p[i]); } void **stb_array_block_alloc(int count, int blocksize) { int i; char *p = (char *) malloc(sizeof(void *) * count + count * blocksize); void **q; if (p == NULL) return NULL; q = (void **) p; p += sizeof(void *) * count; for (i=0; i < count; ++i) q[i] = p + i * blocksize; return q; } #endif #ifdef STB_DEBUG // tricky hack to allow recording FILE,LINE even in varargs functions #define STB__RECORD_FILE(x) (stb__record_fileline(__FILE__, __LINE__),(x)) #define stb_log STB__RECORD_FILE(stb_log) #define stb_ STB__RECORD_FILE(stb_) #ifndef STB_FATAL_CLEAN #define stb_fatal STB__RECORD_FILE(stb_fatal) #endif #define STB__DEBUG(x) x #else #define STB__DEBUG(x) #endif ////////////////////////////////////////////////////////////////////////////// // // stb_temp // #define stb_temp(block, sz) stb__temp(block, sizeof(block), (sz)) STB_EXTERN void * stb__temp(void *b, int b_sz, int want_sz); STB_EXTERN void stb_tempfree(void *block, void *ptr); #ifdef STB_DEFINE void * stb__temp(void *b, int b_sz, int want_sz) { if (b_sz >= want_sz) return b; else return malloc(want_sz); } void stb_tempfree(void *b, void *p) { if (p != b) free(p); } #endif ////////////////////////////////////////////////////////////////////////////// // // math/sampling operations // #define stb_lerp(t,a,b) ( (a) + (t) * (float) ((b)-(a)) ) #define stb_unlerp(t,a,b) ( ((t) - (a)) / (float) ((b) - (a)) ) #define stb_clamp(x,xmin,xmax) ((x) < (xmin) ? (xmin) : (x) > (xmax) ? (xmax) : (x)) STB_EXTERN void stb_newell_normal(float *normal, int num_vert, float **vert, int normalize); STB_EXTERN int stb_box_face_vertex_axis_side(int face_number, int vertex_number, int axis); STB_EXTERN void stb_linear_controller(float *curpos, float target_pos, float acc, float deacc, float dt); STB_EXTERN int stb_float_eq(float x, float y, float delta, int max_ulps); STB_EXTERN int stb_is_prime(unsigned int m); STB_EXTERN unsigned int stb_power_of_two_nearest_prime(int n); STB_EXTERN float stb_smoothstep(float t); STB_EXTERN float stb_cubic_bezier_1d(float t, float p0, float p1, float p2, float p3); STB_EXTERN double stb_linear_remap(double x, double a, double b, double c, double d); #ifdef STB_DEFINE float stb_smoothstep(float t) { return (3 - 2*t)*(t*t); } float stb_cubic_bezier_1d(float t, float p0, float p1, float p2, float p3) { float it = 1-t; return it*it*it*p0 + 3*it*it*t*p1 + 3*it*t*t*p2 + t*t*t*p3; } void stb_newell_normal(float *normal, int num_vert, float **vert, int normalize) { int i,j; float p; normal[0] = normal[1] = normal[2] = 0; for (i=num_vert-1,j=0; j < num_vert; i=j++) { float *u = vert[i]; float *v = vert[j]; normal[0] += (u[1] - v[1]) * (u[2] + v[2]); normal[1] += (u[2] - v[2]) * (u[0] + v[0]); normal[2] += (u[0] - v[0]) * (u[1] + v[1]); } if (normalize) { p = normal[0]*normal[0] + normal[1]*normal[1] + normal[2]*normal[2]; p = (float) (1.0 / sqrt(p)); normal[0] *= p; normal[1] *= p; normal[2] *= p; } } int stb_box_face_vertex_axis_side(int face_number, int vertex_number, int axis) { static int box_vertices[6][4][3] = { { { 1,1,1 }, { 1,0,1 }, { 1,0,0 }, { 1,1,0 } }, { { 0,0,0 }, { 0,0,1 }, { 0,1,1 }, { 0,1,0 } }, { { 0,0,0 }, { 0,1,0 }, { 1,1,0 }, { 1,0,0 } }, { { 0,0,0 }, { 1,0,0 }, { 1,0,1 }, { 0,0,1 } }, { { 1,1,1 }, { 0,1,1 }, { 0,0,1 }, { 1,0,1 } }, { { 1,1,1 }, { 1,1,0 }, { 0,1,0 }, { 0,1,1 } }, }; assert(face_number >= 0 && face_number < 6); assert(vertex_number >= 0 && vertex_number < 4); assert(axis >= 0 && axis < 3); return box_vertices[face_number][vertex_number][axis]; } void stb_linear_controller(float *curpos, float target_pos, float acc, float deacc, float dt) { float sign = 1, p, cp = *curpos; if (cp == target_pos) return; if (target_pos < cp) { target_pos = -target_pos; cp = -cp; sign = -1; } // first decelerate if (cp < 0) { p = cp + deacc * dt; if (p > 0) { p = 0; dt = dt - cp / deacc; if (dt < 0) dt = 0; } else { dt = 0; } cp = p; } // now accelerate p = cp + acc*dt; if (p > target_pos) p = target_pos; *curpos = p * sign; // @TODO: testing } float stb_quadratic_controller(float target_pos, float curpos, float maxvel, float maxacc, float dt, float *curvel) { return 0; // @TODO } int stb_float_eq(float x, float y, float delta, int max_ulps) { if (fabs(x-y) <= delta) return 1; if (abs(*(int *)&x - *(int *)&y) <= max_ulps) return 1; return 0; } int stb_is_prime(unsigned int m) { unsigned int i,j; if (m < 2) return 0; if (m == 2) return 1; if (!(m & 1)) return 0; if (m % 3 == 0) return (m == 3); for (i=5; (j=i*i), j <= m && j > i; i += 6) { if (m % i == 0) return 0; if (m % (i+2) == 0) return 0; } return 1; } unsigned int stb_power_of_two_nearest_prime(int n) { static signed char tab[32] = { 0,0,0,0,1,0,-1,0,1,-1,-1,3,-1,0,-1,2,1, 0,2,0,-1,-4,-1,5,-1,18,-2,15,2,-1,2,0 }; if (!tab[0]) { int i; for (i=0; i < 32; ++i) tab[i] = (1 << i) + 2*tab[i] - 1; tab[1] = 2; tab[0] = 1; } if (n >= 32) return 0xfffffffb; return tab[n]; } double stb_linear_remap(double x, double x_min, double x_max, double out_min, double out_max) { return stb_lerp(stb_unlerp(x,x_min,x_max),out_min,out_max); } #endif // create a macro so it's faster, but you can get at the function pointer #define stb_linear_remap(t,a,b,c,d) stb_lerp(stb_unlerp(t,a,b),c,d) ////////////////////////////////////////////////////////////////////////////// // // bit operations // #define stb_big32(c) (((c)[0]<<24) + (c)[1]*65536 + (c)[2]*256 + (c)[3]) #define stb_little32(c) (((c)[3]<<24) + (c)[2]*65536 + (c)[1]*256 + (c)[0]) #define stb_big16(c) ((c)[0]*256 + (c)[1]) #define stb_little16(c) ((c)[1]*256 + (c)[0]) STB_EXTERN int stb_bitcount(unsigned int a); STB_EXTERN unsigned int stb_bitreverse8(unsigned char n); STB_EXTERN unsigned int stb_bitreverse(unsigned int n); STB_EXTERN int stb_is_pow2(unsigned int n); STB_EXTERN int stb_log2_ceil(unsigned int n); STB_EXTERN int stb_log2_floor(unsigned int n); STB_EXTERN int stb_lowbit8(unsigned int n); STB_EXTERN int stb_highbit8(unsigned int n); #ifdef STB_DEFINE int stb_bitcount(unsigned int a) { a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2 a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4 a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits a = (a + (a >> 8)); // max 16 per 8 bits a = (a + (a >> 16)); // max 32 per 8 bits return a & 0xff; } unsigned int stb_bitreverse8(unsigned char n) { n = ((n & 0xAA) >> 1) + ((n & 0x55) << 1); n = ((n & 0xCC) >> 2) + ((n & 0x33) << 2); return (unsigned char) ((n >> 4) + (n << 4)); } unsigned int stb_bitreverse(unsigned int n) { n = ((n & 0xAAAAAAAA) >> 1) | ((n & 0x55555555) << 1); n = ((n & 0xCCCCCCCC) >> 2) | ((n & 0x33333333) << 2); n = ((n & 0xF0F0F0F0) >> 4) | ((n & 0x0F0F0F0F) << 4); n = ((n & 0xFF00FF00) >> 8) | ((n & 0x00FF00FF) << 8); return (n >> 16) | (n << 16); } int stb_is_pow2(unsigned int n) { return (n & (n-1)) == 0; } // tricky use of 4-bit table to identify 5 bit positions (note the '-1') // 3-bit table would require another tree level; 5-bit table wouldn't save one #if defined(_WIN32) && !defined(__MINGW32__) #pragma warning(push) #pragma warning(disable: 4035) // disable warning about no return value int stb_log2_floor(unsigned int n) { #if _MSC_VER > 1700 unsigned long i; _BitScanReverse(&i, n); return i != 0 ? i : -1; #else __asm { bsr eax,n jnz done mov eax,-1 } done:; #endif } #pragma warning(pop) #else int stb_log2_floor(unsigned int n) { static signed char log2_4[16] = { -1,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3 }; // 2 compares if n < 16, 3 compares otherwise if (n < (1U << 14)) if (n < (1U << 4)) return 0 + log2_4[n ]; else if (n < (1U << 9)) return 5 + log2_4[n >> 5]; else return 10 + log2_4[n >> 10]; else if (n < (1U << 24)) if (n < (1U << 19)) return 15 + log2_4[n >> 15]; else return 20 + log2_4[n >> 20]; else if (n < (1U << 29)) return 25 + log2_4[n >> 25]; else return 30 + log2_4[n >> 30]; } #endif // define ceil from floor int stb_log2_ceil(unsigned int n) { if (stb_is_pow2(n)) return stb_log2_floor(n); else return 1 + stb_log2_floor(n); } int stb_highbit8(unsigned int n) { return stb_log2_ceil(n&255); } int stb_lowbit8(unsigned int n) { static signed char lowbit4[16] = { -1,0,1,0, 2,0,1,0, 3,0,1,0, 2,0,1,0 }; int k = lowbit4[n & 15]; if (k >= 0) return k; k = lowbit4[(n >> 4) & 15]; if (k >= 0) return k+4; return k; } #endif ////////////////////////////////////////////////////////////////////////////// // // qsort Compare Routines // #ifdef _WIN32 #define stb_stricmp(a,b) stricmp(a,b) #define stb_strnicmp(a,b,n) strnicmp(a,b,n) #else #define stb_stricmp(a,b) strcasecmp(a,b) #define stb_strnicmp(a,b,n) strncasecmp(a,b,n) #endif STB_EXTERN int (*stb_intcmp(int offset))(const void *a, const void *b); STB_EXTERN int (*stb_qsort_strcmp(int offset))(const void *a, const void *b); STB_EXTERN int (*stb_qsort_stricmp(int offset))(const void *a, const void *b); STB_EXTERN int (*stb_floatcmp(int offset))(const void *a, const void *b); STB_EXTERN int (*stb_doublecmp(int offset))(const void *a, const void *b); STB_EXTERN int (*stb_charcmp(int offset))(const void *a, const void *b); #ifdef STB_DEFINE static int stb__intcmpoffset, stb__charcmpoffset, stb__strcmpoffset; static int stb__floatcmpoffset, stb__doublecmpoffset; int stb__intcmp(const void *a, const void *b) { const int p = *(const int *) ((const char *) a + stb__intcmpoffset); const int q = *(const int *) ((const char *) b + stb__intcmpoffset); return p < q ? -1 : p > q; } int stb__charcmp(const void *a, const void *b) { const int p = *(const unsigned char *) ((const char *) a + stb__charcmpoffset); const int q = *(const unsigned char *) ((const char *) b + stb__charcmpoffset); return p < q ? -1 : p > q; } int stb__floatcmp(const void *a, const void *b) { const float p = *(const float *) ((const char *) a + stb__floatcmpoffset); const float q = *(const float *) ((const char *) b + stb__floatcmpoffset); return p < q ? -1 : p > q; } int stb__doublecmp(const void *a, const void *b) { const double p = *(const double *) ((const char *) a + stb__doublecmpoffset); const double q = *(const double *) ((const char *) b + stb__doublecmpoffset); return p < q ? -1 : p > q; } int stb__qsort_strcmp(const void *a, const void *b) { const char *p = *(const char **) ((const char *) a + stb__strcmpoffset); const char *q = *(const char **) ((const char *) b + stb__strcmpoffset); return strcmp(p,q); } int stb__qsort_stricmp(const void *a, const void *b) { const char *p = *(const char **) ((const char *) a + stb__strcmpoffset); const char *q = *(const char **) ((const char *) b + stb__strcmpoffset); return stb_stricmp(p,q); } int (*stb_intcmp(int offset))(const void *, const void *) { stb__intcmpoffset = offset; return &stb__intcmp; } int (*stb_charcmp(int offset))(const void *, const void *) { stb__charcmpoffset = offset; return &stb__charcmp; } int (*stb_qsort_strcmp(int offset))(const void *, const void *) { stb__strcmpoffset = offset; return &stb__qsort_strcmp; } int (*stb_qsort_stricmp(int offset))(const void *, const void *) { stb__strcmpoffset = offset; return &stb__qsort_stricmp; } int (*stb_floatcmp(int offset))(const void *, const void *) { stb__floatcmpoffset = offset; return &stb__floatcmp; } int (*stb_doublecmp(int offset))(const void *, const void *) { stb__doublecmpoffset = offset; return &stb__doublecmp; } #endif ////////////////////////////////////////////////////////////////////////////// // // Binary Search Toolkit // typedef struct { int minval, maxval, guess; int mode, step; } stb_search; STB_EXTERN int stb_search_binary(stb_search *s, int minv, int maxv, int find_smallest); STB_EXTERN int stb_search_open(stb_search *s, int minv, int find_smallest); STB_EXTERN int stb_probe(stb_search *s, int compare, int *result); // return 0 when done #ifdef STB_DEFINE enum { STB_probe_binary_smallest, STB_probe_binary_largest, STB_probe_open_smallest, STB_probe_open_largest, }; static int stb_probe_guess(stb_search *s, int *result) { switch(s->mode) { case STB_probe_binary_largest: if (s->minval == s->maxval) { *result = s->minval; return 0; } assert(s->minval < s->maxval); // if a < b, then a < p <= b s->guess = s->minval + (((unsigned) s->maxval - s->minval + 1) >> 1); break; case STB_probe_binary_smallest: if (s->minval == s->maxval) { *result = s->minval; return 0; } assert(s->minval < s->maxval); // if a < b, then a <= p < b s->guess = s->minval + (((unsigned) s->maxval - s->minval) >> 1); break; case STB_probe_open_smallest: case STB_probe_open_largest: s->guess = s->maxval; // guess the current maxval break; } *result = s->guess; return 1; } int stb_probe(stb_search *s, int compare, int *result) { switch(s->mode) { case STB_probe_open_smallest: case STB_probe_open_largest: { if (compare <= 0) { // then it lies within minval & maxval if (s->mode == STB_probe_open_smallest) s->mode = STB_probe_binary_smallest; else s->mode = STB_probe_binary_largest; } else { // otherwise, we need to probe larger s->minval = s->maxval + 1; s->maxval = s->minval + s->step; s->step += s->step; } break; } case STB_probe_binary_smallest: { // if compare < 0, then s->minval <= a < p // if compare = 0, then s->minval <= a <= p // if compare > 0, then p < a <= s->maxval if (compare <= 0) s->maxval = s->guess; else s->minval = s->guess+1; break; } case STB_probe_binary_largest: { // if compare < 0, then s->minval <= a < p // if compare = 0, then p <= a <= s->maxval // if compare > 0, then p < a <= s->maxval if (compare < 0) s->maxval = s->guess-1; else s->minval = s->guess; break; } } return stb_probe_guess(s, result); } int stb_search_binary(stb_search *s, int minv, int maxv, int find_smallest) { int r; if (maxv < minv) return minv-1; s->minval = minv; s->maxval = maxv; s->mode = find_smallest ? STB_probe_binary_smallest : STB_probe_binary_largest; stb_probe_guess(s, &r); return r; } int stb_search_open(stb_search *s, int minv, int find_smallest) { int r; s->step = 4; s->minval = minv; s->maxval = minv+s->step; s->mode = find_smallest ? STB_probe_open_smallest : STB_probe_open_largest; stb_probe_guess(s, &r); return r; } #endif ////////////////////////////////////////////////////////////////////////////// // // String Processing // #define stb_prefixi(s,t) (0==stb_strnicmp((s),(t),strlen(t))) enum stb_splitpath_flag { STB_PATH = 1, STB_FILE = 2, STB_EXT = 4, STB_PATH_FILE = STB_PATH + STB_FILE, STB_FILE_EXT = STB_FILE + STB_EXT, STB_EXT_NO_PERIOD = 8, }; STB_EXTERN char * stb_skipwhite(char *s); STB_EXTERN char * stb_trimwhite(char *s); STB_EXTERN char * stb_skipnewline(char *s); STB_EXTERN char * stb_strncpy(char *s, char *t, int n); STB_EXTERN char * stb_substr(char *t, int n); STB_EXTERN char * stb_duplower(char *s); STB_EXTERN void stb_tolower (char *s); STB_EXTERN char * stb_strchr2 (char *s, char p1, char p2); STB_EXTERN char * stb_strrchr2(char *s, char p1, char p2); STB_EXTERN char * stb_strtok(char *output, char *src, char *delimit); STB_EXTERN char * stb_strtok_keep(char *output, char *src, char *delimit); STB_EXTERN char * stb_strtok_invert(char *output, char *src, char *allowed); STB_EXTERN char * stb_dupreplace(char *s, char *find, char *replace); STB_EXTERN void stb_replaceinplace(char *s, char *find, char *replace); STB_EXTERN char * stb_splitpath(char *output, char *src, int flag); STB_EXTERN char * stb_splitpathdup(char *src, int flag); STB_EXTERN char * stb_replacedir(char *output, char *src, char *dir); STB_EXTERN char * stb_replaceext(char *output, char *src, char *ext); STB_EXTERN void stb_fixpath(char *path); STB_EXTERN char * stb_shorten_path_readable(char *path, int max_len); STB_EXTERN int stb_suffix (char *s, char *t); STB_EXTERN int stb_suffixi(char *s, char *t); STB_EXTERN int stb_prefix (char *s, char *t); STB_EXTERN char * stb_strichr(char *s, char t); STB_EXTERN char * stb_stristr(char *s, char *t); STB_EXTERN int stb_prefix_count(char *s, char *t); STB_EXTERN char * stb_plural(int n); // "s" or "" STB_EXTERN size_t stb_strscpy(char *d, const char *s, size_t n); STB_EXTERN char **stb_tokens(char *src, char *delimit, int *count); STB_EXTERN char **stb_tokens_nested(char *src, char *delimit, int *count, char *nest_in, char *nest_out); STB_EXTERN char **stb_tokens_nested_empty(char *src, char *delimit, int *count, char *nest_in, char *nest_out); STB_EXTERN char **stb_tokens_allowempty(char *src, char *delimit, int *count); STB_EXTERN char **stb_tokens_stripwhite(char *src, char *delimit, int *count); STB_EXTERN char **stb_tokens_withdelim(char *src, char *delimit, int *count); STB_EXTERN char **stb_tokens_quoted(char *src, char *delimit, int *count); // with 'quoted', allow delimiters to appear inside quotation marks, and don't // strip whitespace inside them (and we delete the quotation marks unless they // appear back to back, in which case they're considered escaped) #ifdef STB_DEFINE size_t stb_strscpy(char *d, const char *s, size_t n) { size_t len = strlen(s); if (len >= n) { if (n) d[0] = 0; return 0; } strcpy(d,s); return len + 1; } char *stb_plural(int n) { return n == 1 ? "" : "s"; } int stb_prefix(char *s, char *t) { while (*t) if (*s++ != *t++) return STB_FALSE; return STB_TRUE; } int stb_prefix_count(char *s, char *t) { int c=0; while (*t) { if (*s++ != *t++) break; ++c; } return c; } int stb_suffix(char *s, char *t) { size_t n = strlen(s); size_t m = strlen(t); if (m <= n) return 0 == strcmp(s+n-m, t); else return 0; } int stb_suffixi(char *s, char *t) { size_t n = strlen(s); size_t m = strlen(t); if (m <= n) return 0 == stb_stricmp(s+n-m, t); else return 0; } // originally I was using this table so that I could create known sentinel // values--e.g. change whitetable[0] to be true if I was scanning for whitespace, // and false if I was scanning for nonwhite. I don't appear to be using that // functionality anymore (I do for tokentable, though), so just replace it // with isspace() char *stb_skipwhite(char *s) { while (isspace((unsigned char) *s)) ++s; return s; } char *stb_skipnewline(char *s) { if (s[0] == '\r' || s[0] == '\n') { if (s[0]+s[1] == '\r' + '\n') ++s; ++s; } return s; } char *stb_trimwhite(char *s) { int i,n; s = stb_skipwhite(s); n = (int) strlen(s); for (i=n-1; i >= 0; --i) if (!isspace(s[i])) break; s[i+1] = 0; return s; } char *stb_strncpy(char *s, char *t, int n) { strncpy(s,t,n); s[n-1] = 0; return s; } char *stb_substr(char *t, int n) { char *a; int z = (int) strlen(t); if (z < n) n = z; a = (char *) malloc(n+1); strncpy(a,t,n); a[n] = 0; return a; } char *stb_duplower(char *s) { char *p = strdup(s), *q = p; while (*q) { *q = tolower(*q); ++q; } return p; } void stb_tolower(char *s) { while (*s) { *s = tolower(*s); ++s; } } char *stb_strchr2(char *s, char x, char y) { for(; *s; ++s) if (*s == x || *s == y) return s; return NULL; } char *stb_strrchr2(char *s, char x, char y) { char *r = NULL; for(; *s; ++s) if (*s == x || *s == y) r = s; return r; } char *stb_strichr(char *s, char t) { if (tolower(t) == toupper(t)) return strchr(s,t); return stb_strchr2(s, (char) tolower(t), (char) toupper(t)); } char *stb_stristr(char *s, char *t) { size_t n = strlen(t); char *z; if (n==0) return s; while ((z = stb_strichr(s, *t)) != NULL) { if (0==stb_strnicmp(z, t, n)) return z; s = z+1; } return NULL; } static char *stb_strtok_raw(char *output, char *src, char *delimit, int keep, int invert) { if (invert) { while (*src && strchr(delimit, *src) != NULL) { *output++ = *src++; } } else { while (*src && strchr(delimit, *src) == NULL) { *output++ = *src++; } } *output = 0; if (keep) return src; else return *src ? src+1 : src; } char *stb_strtok(char *output, char *src, char *delimit) { return stb_strtok_raw(output, src, delimit, 0, 0); } char *stb_strtok_keep(char *output, char *src, char *delimit) { return stb_strtok_raw(output, src, delimit, 1, 0); } char *stb_strtok_invert(char *output, char *src, char *delimit) { return stb_strtok_raw(output, src, delimit, 1,1); } static char **stb_tokens_raw(char *src_, char *delimit, int *count, int stripwhite, int allow_empty, char *start, char *end) { int nested = 0; unsigned char *src = (unsigned char *) src_; static char stb_tokentable[256]; // rely on static initializion to 0 static char stable[256],etable[256]; char *out; char **result; int num=0; unsigned char *s; s = (unsigned char *) delimit; while (*s) stb_tokentable[*s++] = 1; if (start) { s = (unsigned char *) start; while (*s) stable[*s++] = 1; s = (unsigned char *) end; if (s) while (*s) stable[*s++] = 1; s = (unsigned char *) end; if (s) while (*s) etable[*s++] = 1; } stable[0] = 1; // two passes through: the first time, counting how many s = (unsigned char *) src; while (*s) { // state: just found delimiter // skip further delimiters if (!allow_empty) { stb_tokentable[0] = 0; while (stb_tokentable[*s]) ++s; if (!*s) break; } ++num; // skip further non-delimiters stb_tokentable[0] = 1; if (stripwhite == 2) { // quoted strings while (!stb_tokentable[*s]) { if (*s != '"') ++s; else { ++s; if (*s == '"') ++s; // "" -> ", not start a string else { // begin a string while (*s) { if (s[0] == '"') { if (s[1] == '"') s += 2; // "" -> " else { ++s; break; } // terminating " } else ++s; } } } } } else while (nested || !stb_tokentable[*s]) { if (stable[*s]) { if (!*s) break; if (end ? etable[*s] : nested) --nested; else ++nested; } ++s; } if (allow_empty) { if (*s) ++s; } } // now num has the actual count... malloc our output structure // need space for all the strings: strings won't be any longer than // original input, since for every '\0' there's at least one delimiter result = (char **) malloc(sizeof(*result) * (num+1) + (s-src+1)); if (result == NULL) return result; out = (char *) (result + (num+1)); // second pass: copy out the data s = (unsigned char *) src; num = 0; nested = 0; while (*s) { char *last_nonwhite; // state: just found delimiter // skip further delimiters if (!allow_empty) { stb_tokentable[0] = 0; if (stripwhite) while (stb_tokentable[*s] || isspace(*s)) ++s; else while (stb_tokentable[*s]) ++s; } else if (stripwhite) { while (isspace(*s)) ++s; } if (!*s) break; // we're past any leading delimiters and whitespace result[num] = out; ++num; // copy non-delimiters stb_tokentable[0] = 1; last_nonwhite = out-1; if (stripwhite == 2) { while (!stb_tokentable[*s]) { if (*s != '"') { if (!isspace(*s)) last_nonwhite = out; *out++ = *s++; } else { ++s; if (*s == '"') { if (!isspace(*s)) last_nonwhite = out; *out++ = *s++; // "" -> ", not start string } else { // begin a quoted string while (*s) { if (s[0] == '"') { if (s[1] == '"') { *out++ = *s; s += 2; } else { ++s; break; } // terminating " } else *out++ = *s++; } last_nonwhite = out-1; // all in quotes counts as non-white } } } } else { while (nested || !stb_tokentable[*s]) { if (!isspace(*s)) last_nonwhite = out; if (stable[*s]) { if (!*s) break; if (end ? etable[*s] : nested) --nested; else ++nested; } *out++ = *s++; } } if (stripwhite) // rewind to last non-whitespace char out = last_nonwhite+1; *out++ = '\0'; if (*s) ++s; // skip delimiter } s = (unsigned char *) delimit; while (*s) stb_tokentable[*s++] = 0; if (start) { s = (unsigned char *) start; while (*s) stable[*s++] = 1; s = (unsigned char *) end; if (s) while (*s) stable[*s++] = 1; s = (unsigned char *) end; if (s) while (*s) etable[*s++] = 1; } if (count != NULL) *count = num; result[num] = 0; return result; } char **stb_tokens(char *src, char *delimit, int *count) { return stb_tokens_raw(src,delimit,count,0,0,0,0); } char **stb_tokens_nested(char *src, char *delimit, int *count, char *nest_in, char *nest_out) { return stb_tokens_raw(src,delimit,count,0,0,nest_in,nest_out); } char **stb_tokens_nested_empty(char *src, char *delimit, int *count, char *nest_in, char *nest_out) { return stb_tokens_raw(src,delimit,count,0,1,nest_in,nest_out); } char **stb_tokens_allowempty(char *src, char *delimit, int *count) { return stb_tokens_raw(src,delimit,count,0,1,0,0); } char **stb_tokens_stripwhite(char *src, char *delimit, int *count) { return stb_tokens_raw(src,delimit,count,1,1,0,0); } char **stb_tokens_quoted(char *src, char *delimit, int *count) { return stb_tokens_raw(src,delimit,count,2,1,0,0); } char *stb_dupreplace(char *src, char *find, char *replace) { size_t len_find = strlen(find); size_t len_replace = strlen(replace); int count = 0; char *s,*p,*q; s = strstr(src, find); if (s == NULL) return strdup(src); do { ++count; s = strstr(s + len_find, find); } while (s != NULL); p = (char *) malloc(strlen(src) + count * (len_replace - len_find) + 1); if (p == NULL) return p; q = p; s = src; for (;;) { char *t = strstr(s, find); if (t == NULL) { strcpy(q,s); assert(strlen(p) == strlen(src) + count*(len_replace-len_find)); return p; } memcpy(q, s, t-s); q += t-s; memcpy(q, replace, len_replace); q += len_replace; s = t + len_find; } } void stb_replaceinplace(char *src, char *find, char *replace) { size_t len_find = strlen(find); size_t len_replace = strlen(replace); int delta; char *s,*p,*q; delta = len_replace - len_find; assert(delta <= 0); if (delta > 0) return; p = strstr(src, find); if (p == NULL) return; s = q = p; while (*s) { memcpy(q, replace, len_replace); p += len_find; q += len_replace; s = strstr(p, find); if (s == NULL) s = p + strlen(p); memmove(q, p, s-p); q += s-p; p = s; } *q = 0; } void stb_fixpath(char *path) { for(; *path; ++path) if (*path == '\\') *path = '/'; } void stb__add_section(char *buffer, char *data, int curlen, int newlen) { if (newlen < curlen) { int z1 = newlen >> 1, z2 = newlen-z1; memcpy(buffer, data, z1-1); buffer[z1-1] = '.'; buffer[z1-0] = '.'; memcpy(buffer+z1+1, data+curlen-z2+1, z2-1); } else memcpy(buffer, data, curlen); } char * stb_shorten_path_readable(char *path, int len) { static char buffer[1024]; int n = strlen(path),n1,n2,r1,r2; char *s; if (n <= len) return path; if (len > 1024) return path; s = stb_strrchr2(path, '/', '\\'); if (s) { n1 = s - path + 1; n2 = n - n1; ++s; } else { n1 = 0; n2 = n; s = path; } // now we need to reduce r1 and r2 so that they fit in len if (n1 < len>>1) { r1 = n1; r2 = len - r1; } else if (n2 < len >> 1) { r2 = n2; r1 = len - r2; } else { r1 = n1 * len / n; r2 = n2 * len / n; if (r1 < len>>2) r1 = len>>2, r2 = len-r1; if (r2 < len>>2) r2 = len>>2, r1 = len-r2; } assert(r1 <= n1 && r2 <= n2); if (n1) stb__add_section(buffer, path, n1, r1); stb__add_section(buffer+r1, s, n2, r2); buffer[len] = 0; return buffer; } static char *stb__splitpath_raw(char *buffer, char *path, int flag) { int len=0,x,y, n = (int) strlen(path), f1,f2; char *s = stb_strrchr2(path, '/', '\\'); char *t = strrchr(path, '.'); if (s && t && t < s) t = NULL; if (s) ++s; if (flag == STB_EXT_NO_PERIOD) flag |= STB_EXT; if (!(flag & (STB_PATH | STB_FILE | STB_EXT))) return NULL; f1 = s == NULL ? 0 : s-path; // start of filename f2 = t == NULL ? n : t-path; // just past end of filename if (flag & STB_PATH) { x = 0; if (f1 == 0 && flag == STB_PATH) len=2; } else if (flag & STB_FILE) { x = f1; } else { x = f2; if (flag & STB_EXT_NO_PERIOD) if (buffer[x] == '.') ++x; } if (flag & STB_EXT) y = n; else if (flag & STB_FILE) y = f2; else y = f1; if (buffer == NULL) { buffer = (char *) malloc(y-x + len + 1); if (!buffer) return NULL; } if (len) { strcpy(buffer, "./"); return buffer; } strncpy(buffer, path+x, y-x); buffer[y-x] = 0; return buffer; } char *stb_splitpath(char *output, char *src, int flag) { return stb__splitpath_raw(output, src, flag); } char *stb_splitpathdup(char *src, int flag) { return stb__splitpath_raw(NULL, src, flag); } char *stb_replacedir(char *output, char *src, char *dir) { char buffer[4096]; stb_splitpath(buffer, src, STB_FILE | STB_EXT); if (dir) sprintf(output, "%s/%s", dir, buffer); else strcpy(output, buffer); return output; } char *stb_replaceext(char *output, char *src, char *ext) { char buffer[4096]; stb_splitpath(buffer, src, STB_PATH | STB_FILE); if (ext) sprintf(output, "%s.%s", buffer, ext[0] == '.' ? ext+1 : ext); else strcpy(output, buffer); return output; } #endif ////////////////////////////////////////////////////////////////////////////// // // stb_alloc - hierarchical allocator // // inspired by http://swapped.cc/halloc // // // When you alloc a given block through stb_alloc, you have these choices: // // 1. does it have a parent? // 2. can it have children? // 3. can it be freed directly? // 4. is it transferrable? // 5. what is its alignment? // // Here are interesting combinations of those: // // children free transfer alignment // arena Y Y N n/a // no-overhead, chunked N N N normal // string pool alloc N N N 1 // parent-ptr, chunked Y N N normal // low-overhead, unchunked N Y Y normal // general purpose alloc Y Y Y normal // // Unchunked allocations will probably return 16-aligned pointers. If // we 16-align the results, we have room for 4 pointers. For smaller // allocations that allow finer alignment, we can reduce the pointers. // // The strategy is that given a pointer, assuming it has a header (only // the no-overhead allocations have no header), we can determine the // type of the header fields, and the number of them, by stepping backwards // through memory and looking at the tags in the bottom bits. // // Implementation strategy: // chunked allocations come from the middle of chunks, and can't // be freed. thefore they do not need to be on a sibling chain. // they may need child pointers if they have children. // // chunked, with-children // void *parent; // // unchunked, no-children -- reduced storage // void *next_sibling; // void *prev_sibling_nextp; // // unchunked, general // void *first_child; // void *next_sibling; // void *prev_sibling_nextp; // void *chunks; // // so, if we code each of these fields with different bit patterns // (actually same one for next/prev/child), then we can identify which // each one is from the last field. STB_EXTERN void stb_free(void *p); STB_EXTERN void *stb_malloc_global(size_t size); STB_EXTERN void *stb_malloc(void *context, size_t size); STB_EXTERN void *stb_malloc_nofree(void *context, size_t size); STB_EXTERN void *stb_malloc_leaf(void *context, size_t size); STB_EXTERN void *stb_malloc_raw(void *context, size_t size); STB_EXTERN void *stb_realloc(void *ptr, size_t newsize); STB_EXTERN void stb_reassign(void *new_context, void *ptr); STB_EXTERN void stb_malloc_validate(void *p, void *parent); extern int stb_alloc_chunk_size ; extern int stb_alloc_count_free ; extern int stb_alloc_count_alloc; extern int stb_alloc_alignment ; #ifdef STB_DEFINE int stb_alloc_chunk_size = 65536; int stb_alloc_count_free = 0; int stb_alloc_count_alloc = 0; int stb_alloc_alignment = -16; typedef struct stb__chunk { struct stb__chunk *next; int data_left; int alloc; } stb__chunk; typedef struct { void * next; void ** prevn; } stb__nochildren; typedef struct { void ** prevn; void * child; void * next; stb__chunk *chunks; } stb__alloc; typedef struct { stb__alloc *parent; } stb__chunked; #define STB__PARENT 1 #define STB__CHUNKS 2 typedef enum { STB__nochildren = 0, STB__chunked = STB__PARENT, STB__alloc = STB__CHUNKS, STB__chunk_raw = 4, } stb__alloc_type; // these functions set the bottom bits of a pointer efficiently #define STB__DECODE(x,v) ((void *) ((char *) (x) - (v))) #define STB__ENCODE(x,v) ((void *) ((char *) (x) + (v))) #define stb__parent(z) (stb__alloc *) STB__DECODE((z)->parent, STB__PARENT) #define stb__chunks(z) (stb__chunk *) STB__DECODE((z)->chunks, STB__CHUNKS) #define stb__setparent(z,p) (z)->parent = (stb__alloc *) STB__ENCODE((p), STB__PARENT) #define stb__setchunks(z,c) (z)->chunks = (stb__chunk *) STB__ENCODE((c), STB__CHUNKS) static stb__alloc stb__alloc_global = { NULL, NULL, NULL, (stb__chunk *) STB__ENCODE(NULL, STB__CHUNKS) }; static stb__alloc_type stb__identify(void *p) { void **q = (void **) p; return (stb__alloc_type) ((stb_uinta) q[-1] & 3); } static void *** stb__prevn(void *p) { if (stb__identify(p) == STB__alloc) { stb__alloc *s = (stb__alloc *) p - 1; return &s->prevn; } else { stb__nochildren *s = (stb__nochildren *) p - 1; return &s->prevn; } } void stb_free(void *p) { if (p == NULL) return; // count frees so that unit tests can see what's happening ++stb_alloc_count_free; switch(stb__identify(p)) { case STB__chunked: // freeing a chunked-block with children does nothing; // they only get freed when the parent does // surely this is wrong, and it should free them immediately? // otherwise how are they getting put on the right chain? return; case STB__nochildren: { stb__nochildren *s = (stb__nochildren *) p - 1; // unlink from sibling chain *(s->prevn) = s->next; if (s->next) *stb__prevn(s->next) = s->prevn; free(s); return; } case STB__alloc: { stb__alloc *s = (stb__alloc *) p - 1; stb__chunk *c, *n; void *q; // unlink from sibling chain, if any *(s->prevn) = s->next; if (s->next) *stb__prevn(s->next) = s->prevn; // first free chunks c = (stb__chunk *) stb__chunks(s); while (c != NULL) { n = c->next; stb_alloc_count_free += c->alloc; free(c); c = n; } // validating stb__setchunks(s,NULL); s->prevn = NULL; s->next = NULL; // now free children while ((q = s->child) != NULL) { stb_free(q); } // now free self free(s); return; } default: assert(0); /* NOTREACHED */ } } void stb_malloc_validate(void *p, void *parent) { if (p == NULL) return; switch(stb__identify(p)) { case STB__chunked: return; case STB__nochildren: { stb__nochildren *n = (stb__nochildren *) p - 1; if (n->prevn) assert(*n->prevn == p); if (n->next) { assert(*stb__prevn(n->next) == &n->next); stb_malloc_validate(n, parent); } return; } case STB__alloc: { stb__alloc *s = (stb__alloc *) p - 1; if (s->prevn) assert(*s->prevn == p); if (s->child) { assert(*stb__prevn(s->child) == &s->child); stb_malloc_validate(s->child, p); } if (s->next) { assert(*stb__prevn(s->next) == &s->next); stb_malloc_validate(s->next, parent); } return; } default: assert(0); /* NOTREACHED */ } } static void * stb__try_chunk(stb__chunk *c, int size, int align, int pre_align) { char *memblock = (char *) (c+1), *q; stb_inta iq; int start_offset; // we going to allocate at the end of the chunk, not the start. confusing, // but it means we don't need both a 'limit' and a 'cur', just a 'cur'. // the block ends at: p + c->data_left // then we move back by size start_offset = c->data_left - size; // now we need to check the alignment of that q = memblock + start_offset; iq = (stb_inta) q; assert(sizeof(q) == sizeof(iq)); // suppose align = 2 // then we need to retreat iq far enough that (iq & (2-1)) == 0 // to get (iq & (align-1)) = 0 requires subtracting (iq & (align-1)) start_offset -= iq & (align-1); assert(((stb_uinta) (memblock+start_offset) & (align-1)) == 0); // now, if that + pre_align works, go for it! start_offset -= pre_align; if (start_offset >= 0) { c->data_left = start_offset; return memblock + start_offset; } return NULL; } static void stb__sort_chunks(stb__alloc *src) { // of the first two chunks, put the chunk with more data left in it first stb__chunk *c = stb__chunks(src), *d; if (c == NULL) return; d = c->next; if (d == NULL) return; if (c->data_left > d->data_left) return; c->next = d->next; d->next = c; stb__setchunks(src, d); } static void * stb__alloc_chunk(stb__alloc *src, int size, int align, int pre_align) { void *p; stb__chunk *c = stb__chunks(src); if (c && size <= stb_alloc_chunk_size) { p = stb__try_chunk(c, size, align, pre_align); if (p) { ++c->alloc; return p; } // try a second chunk to reduce wastage if (c->next) { p = stb__try_chunk(c->next, size, align, pre_align); if (p) { ++c->alloc; return p; } // put the bigger chunk first, since the second will get buried // the upshot of this is that, until it gets allocated from, chunk #2 // is always the largest remaining chunk. (could formalize // this with a heap!) stb__sort_chunks(src); c = stb__chunks(src); } } // allocate a new chunk { stb__chunk *n; int chunk_size = stb_alloc_chunk_size; // we're going to allocate a new chunk to put this in if (size > chunk_size) chunk_size = size; assert(sizeof(*n) + pre_align <= 16); // loop trying to allocate a large enough chunk // the loop is because the alignment may cause problems if it's big... // and we don't know what our chunk alignment is going to be while (1) { n = (stb__chunk *) malloc(16 + chunk_size); if (n == NULL) return NULL; n->data_left = chunk_size - sizeof(*n); p = stb__try_chunk(n, size, align, pre_align); if (p != NULL) { n->next = c; stb__setchunks(src, n); // if we just used up the whole block immediately, // move the following chunk up n->alloc = 1; if (size == chunk_size) stb__sort_chunks(src); return p; } free(n); chunk_size += 16+align; } } } static stb__alloc * stb__get_context(void *context) { if (context == NULL) { return &stb__alloc_global; } else { int u = stb__identify(context); // if context is chunked, grab parent if (u == STB__chunked) { stb__chunked *s = (stb__chunked *) context - 1; return stb__parent(s); } else { return (stb__alloc *) context - 1; } } } static void stb__insert_alloc(stb__alloc *src, stb__alloc *s) { s->prevn = &src->child; s->next = src->child; src->child = s+1; if (s->next) *stb__prevn(s->next) = &s->next; } static void stb__insert_nochild(stb__alloc *src, stb__nochildren *s) { s->prevn = &src->child; s->next = src->child; src->child = s+1; if (s->next) *stb__prevn(s->next) = &s->next; } static void * malloc_base(void *context, size_t size, stb__alloc_type t, int align) { void *p; stb__alloc *src = stb__get_context(context); if (align <= 0) { // compute worst-case C packed alignment // e.g. a 24-byte struct is 8-aligned int align_proposed = 1 << stb_lowbit8(size); if (align_proposed < 0) align_proposed = 4; if (align_proposed == 0) { if (size == 0) align_proposed = 1; else align_proposed = 256; } // a negative alignment means 'don't align any larger // than this'; so -16 means we align 1,2,4,8, or 16 if (align < 0) { if (align_proposed > -align) align_proposed = -align; } align = align_proposed; } assert(stb_is_pow2(align)); // don't cause misalignment when allocating nochildren if (t == STB__nochildren && align > 8) t = STB__alloc; switch (t) { case STB__alloc: { stb__alloc *s = (stb__alloc *) malloc(size + sizeof(*s)); if (s == NULL) return NULL; p = s+1; s->child = NULL; stb__insert_alloc(src, s); stb__setchunks(s,NULL); break; } case STB__nochildren: { stb__nochildren *s = (stb__nochildren *) malloc(size + sizeof(*s)); if (s == NULL) return NULL; p = s+1; stb__insert_nochild(src, s); break; } case STB__chunk_raw: { p = stb__alloc_chunk(src, size, align, 0); if (p == NULL) return NULL; break; } case STB__chunked: { stb__chunked *s; if (align < sizeof(stb_uintptr)) align = sizeof(stb_uintptr); s = (stb__chunked *) stb__alloc_chunk(src, size, align, sizeof(*s)); if (s == NULL) return NULL; stb__setparent(s, src); p = s+1; break; } default: p = NULL; assert(0); /* NOTREACHED */ } ++stb_alloc_count_alloc; return p; } void *stb_malloc_global(size_t size) { return malloc_base(NULL, size, STB__alloc, stb_alloc_alignment); } void *stb_malloc(void *context, size_t size) { return malloc_base(context, size, STB__alloc, stb_alloc_alignment); } void *stb_malloc_nofree(void *context, size_t size) { return malloc_base(context, size, STB__chunked, stb_alloc_alignment); } void *stb_malloc_leaf(void *context, size_t size) { return malloc_base(context, size, STB__nochildren, stb_alloc_alignment); } void *stb_malloc_raw(void *context, size_t size) { return malloc_base(context, size, STB__chunk_raw, stb_alloc_alignment); } char *stb_malloc_string(void *context, size_t size) { return (char *) malloc_base(context, size, STB__chunk_raw, 1); } void *stb_realloc(void *ptr, size_t newsize) { stb__alloc_type t; if (ptr == NULL) return stb_malloc(NULL, newsize); if (newsize == 0) { stb_free(ptr); return NULL; } t = stb__identify(ptr); assert(t == STB__alloc || t == STB__nochildren); if (t == STB__alloc) { stb__alloc *s = (stb__alloc *) ptr - 1; s = (stb__alloc *) realloc(s, newsize + sizeof(*s)); if (s == NULL) return NULL; ptr = s+1; // update pointers (*s->prevn) = ptr; if (s->next) *stb__prevn(s->next) = &s->next; if (s->child) *stb__prevn(s->child) = &s->child; return ptr; } else { stb__nochildren *s = (stb__nochildren *) ptr - 1; s = (stb__nochildren *) realloc(ptr, newsize + sizeof(s)); if (s == NULL) return NULL; // update pointers (*s->prevn) = s+1; if (s->next) *stb__prevn(s->next) = &s->next; return s+1; } } void *stb_realloc_c(void *context, void *ptr, size_t newsize) { if (ptr == NULL) return stb_malloc(context, newsize); if (newsize == 0) { stb_free(ptr); return NULL; } // @TODO: verify you haven't changed contexts return stb_realloc(ptr, newsize); } void stb_reassign(void *new_context, void *ptr) { stb__alloc *src = stb__get_context(new_context); stb__alloc_type t = stb__identify(ptr); assert(t == STB__alloc || t == STB__nochildren); if (t == STB__alloc) { stb__alloc *s = (stb__alloc *) ptr - 1; // unlink from old *(s->prevn) = s->next; if (s->next) *stb__prevn(s->next) = s->prevn; stb__insert_alloc(src, s); } else { stb__nochildren *s = (stb__nochildren *) ptr - 1; // unlink from old *(s->prevn) = s->next; if (s->next) *stb__prevn(s->next) = s->prevn; stb__insert_nochild(src, s); } } #endif ////////////////////////////////////////////////////////////////////////////// // // stb_arr // // An stb_arr is directly useable as a pointer (use the actual type in your // definition), but when it resizes, it returns a new pointer and you can't // use the old one, so you have to be careful to copy-in-out as necessary. // // Use a NULL pointer as a 0-length array. // // float *my_array = NULL, *temp; // // // add elements on the end one at a time // stb_arr_push(my_array, 0.0f); // stb_arr_push(my_array, 1.0f); // stb_arr_push(my_array, 2.0f); // // assert(my_array[1] == 2.0f); // // // add an uninitialized element at the end, then assign it // *stb_arr_add(my_array) = 3.0f; // // // add three uninitialized elements at the end // temp = stb_arr_addn(my_array,3); // temp[0] = 4.0f; // temp[1] = 5.0f; // temp[2] = 6.0f; // // assert(my_array[5] == 5.0f); // // // remove the last one // stb_arr_pop(my_array); // // assert(stb_arr_len(my_array) == 6); #ifdef STB_MALLOC_WRAPPER #define STB__PARAMS , char *file, int line #define STB__ARGS , file, line #else #define STB__PARAMS #define STB__ARGS #endif // calling this function allocates an empty stb_arr attached to p // (whereas NULL isn't attached to anything) STB_EXTERN void stb_arr_malloc(void **target, void *context); // call this function with a non-NULL value to have all successive // stbs that are created be attached to the associated parent. Note // that once a given stb_arr is non-empty, it stays attached to its // current parent, even if you call this function again. // it turns the previous value, so you can restore it STB_EXTERN void* stb_arr_malloc_parent(void *p); // simple functions written on top of other functions #define stb_arr_empty(a) ( stb_arr_len(a) == 0 ) #define stb_arr_add(a) ( stb_arr_addn((a),1) ) #define stb_arr_push(a,v) ( *stb_arr_add(a)=(v) ) typedef struct { int len, limit; int stb_malloc; unsigned int signature; } stb__arr; #define stb_arr_signature 0x51bada7b // ends with 0123 in decimal // access the header block stored before the data #define stb_arrhead(a) /*lint --e(826)*/ (((stb__arr *) (a)) - 1) #define stb_arrhead2(a) /*lint --e(826)*/ (((stb__arr *) (a)) - 1) #ifdef STB_DEBUG #define stb_arr_check(a) assert(!a || stb_arrhead(a)->signature == stb_arr_signature) #define stb_arr_check2(a) assert(!a || stb_arrhead2(a)->signature == stb_arr_signature) #else #define stb_arr_check(a) ((void) 0) #define stb_arr_check2(a) ((void) 0) #endif // ARRAY LENGTH // get the array length; special case if pointer is NULL #define stb_arr_len(a) (a ? stb_arrhead(a)->len : 0) #define stb_arr_len2(a) ((stb__arr *) (a) ? stb_arrhead2(a)->len : 0) #define stb_arr_lastn(a) (stb_arr_len(a)-1) // check whether a given index is valid -- tests 0 <= i < stb_arr_len(a) #define stb_arr_valid(a,i) (a ? (int) (i) < stb_arrhead(a)->len : 0) // change the array length so is is exactly N entries long, creating // uninitialized entries as needed #define stb_arr_setlen(a,n) \ (stb__arr_setlen((void **) &(a), sizeof(a[0]), (n))) // change the array length so that N is a valid index (that is, so // it is at least N entries long), creating uninitialized entries as needed #define stb_arr_makevalid(a,n) \ (stb_arr_len(a) < (n)+1 ? stb_arr_setlen(a,(n)+1),(a) : (a)) // remove the last element of the array, returning it #define stb_arr_pop(a) ((stb_arr_check(a), (a))[--stb_arrhead(a)->len]) // access the last element in the array #define stb_arr_last(a) ((stb_arr_check(a), (a))[stb_arr_len(a)-1]) // is iterator at end of list? #define stb_arr_end(a,i) ((i) >= &(a)[stb_arr_len(a)]) // (internal) change the allocated length of the array #define stb_arr__grow(a,n) (stb_arr_check(a), stb_arrhead(a)->len += (n)) // add N new unitialized elements to the end of the array #define stb_arr__addn(a,n) /*lint --e(826)*/ \ ((stb_arr_len(a)+(n) > stb_arrcurmax(a)) \ ? (stb__arr_addlen((void **) &(a),sizeof(*a),(n)),0) \ : ((stb_arr__grow(a,n), 0))) // add N new unitialized elements to the end of the array, and return // a pointer to the first new one #define stb_arr_addn(a,n) (stb_arr__addn((a),n),(a)+stb_arr_len(a)-(n)) // add N new uninitialized elements starting at index 'i' #define stb_arr_insertn(a,i,n) (stb__arr_insertn((void **) &(a), sizeof(*a), i, n)) // insert an element at i #define stb_arr_insert(a,i,v) (stb__arr_insertn((void **) &(a), sizeof(*a), i, 1), ((a)[i] = v)) // delete N elements from the middle starting at index 'i' #define stb_arr_deleten(a,i,n) (stb__arr_deleten((void **) &(a), sizeof(*a), i, n)) // delete the i'th element #define stb_arr_delete(a,i) stb_arr_deleten(a,i,1) // delete the i'th element, swapping down from the end #define stb_arr_fastdelete(a,i) \ (stb_swap(&a[i], &a[stb_arrhead(a)->len-1], sizeof(*a)), stb_arr_pop(a)) // ARRAY STORAGE // get the array maximum storage; special case if NULL #define stb_arrcurmax(a) (a ? stb_arrhead(a)->limit : 0) #define stb_arrcurmax2(a) (a ? stb_arrhead2(a)->limit : 0) // set the maxlength of the array to n in anticipation of further growth #define stb_arr_setsize(a,n) (stb_arr_check(a), stb__arr_setsize((void **) &(a),sizeof((a)[0]),n)) // make sure maxlength is large enough for at least N new allocations #define stb_arr_atleast(a,n) (stb_arr_len(a)+(n) > stb_arrcurmax(a) \ ? stb_arr_setsize((a), (n)) : 0) // make a copy of a given array (copies contents via 'memcpy'!) #define stb_arr_copy(a) stb__arr_copy(a, sizeof((a)[0])) // compute the storage needed to store all the elements of the array #define stb_arr_storage(a) (stb_arr_len(a) * sizeof((a)[0])) #define stb_arr_for(v,arr) for((v)=(arr); (v) < (arr)+stb_arr_len(arr); ++(v)) // IMPLEMENTATION STB_EXTERN void stb_arr_free_(void **p); STB_EXTERN void *stb__arr_copy_(void *p, int elem_size); STB_EXTERN void stb__arr_setsize_(void **p, int size, int limit STB__PARAMS); STB_EXTERN void stb__arr_setlen_(void **p, int size, int newlen STB__PARAMS); STB_EXTERN void stb__arr_addlen_(void **p, int size, int addlen STB__PARAMS); STB_EXTERN void stb__arr_deleten_(void **p, int size, int loc, int n STB__PARAMS); STB_EXTERN void stb__arr_insertn_(void **p, int size, int loc, int n STB__PARAMS); #define stb_arr_free(p) stb_arr_free_((void **) &(p)) #define stb__arr_copy stb__arr_copy_ #ifndef STB_MALLOC_WRAPPER #define stb__arr_setsize stb__arr_setsize_ #define stb__arr_setlen stb__arr_setlen_ #define stb__arr_addlen stb__arr_addlen_ #define stb__arr_deleten stb__arr_deleten_ #define stb__arr_insertn stb__arr_insertn_ #else #define stb__arr_addlen(p,s,n) stb__arr_addlen_(p,s,n,__FILE__,__LINE__) #define stb__arr_setlen(p,s,n) stb__arr_setlen_(p,s,n,__FILE__,__LINE__) #define stb__arr_setsize(p,s,n) stb__arr_setsize_(p,s,n,__FILE__,__LINE__) #define stb__arr_deleten(p,s,i,n) stb__arr_deleten_(p,s,i,n,__FILE__,__LINE__) #define stb__arr_insertn(p,s,i,n) stb__arr_insertn_(p,s,i,n,__FILE__,__LINE__) #endif #ifdef STB_DEFINE static void *stb__arr_context; void *stb_arr_malloc_parent(void *p) { void *q = stb__arr_context; stb__arr_context = p; return q; } void stb_arr_malloc(void **target, void *context) { stb__arr *q = (stb__arr *) stb_malloc(context, sizeof(*q)); q->len = q->limit = 0; q->stb_malloc = 1; q->signature = stb_arr_signature; *target = (void *) (q+1); } static void * stb__arr_malloc(int size) { if (stb__arr_context) return stb_malloc(stb__arr_context, size); return malloc(size); } void * stb__arr_copy_(void *p, int elem_size) { stb__arr *q; if (p == NULL) return p; q = (stb__arr *) stb__arr_malloc(sizeof(*q) + elem_size * stb_arrhead2(p)->limit); stb_arr_check2(p); memcpy(q, stb_arrhead2(p), sizeof(*q) + elem_size * stb_arrhead2(p)->len); q->stb_malloc = !!stb__arr_context; return q+1; } void stb_arr_free_(void **pp) { void *p = *pp; stb_arr_check2(p); if (p) { stb__arr *q = stb_arrhead2(p); if (q->stb_malloc) stb_free(q); else free(q); } *pp = NULL; } static void stb__arrsize_(void **pp, int size, int limit, int len STB__PARAMS) { void *p = *pp; stb__arr *a; stb_arr_check2(p); if (p == NULL) { if (len == 0 && size == 0) return; a = (stb__arr *) stb__arr_malloc(sizeof(*a) + size*limit); a->limit = limit; a->len = len; a->stb_malloc = !!stb__arr_context; a->signature = stb_arr_signature; } else { a = stb_arrhead2(p); a->len = len; if (a->limit < limit) { void *p; if (a->limit >= 4 && limit < a->limit * 2) limit = a->limit * 2; if (a->stb_malloc) p = stb_realloc(a, sizeof(*a) + limit*size); else #ifdef STB_MALLOC_WRAPPER p = stb__realloc(a, sizeof(*a) + limit*size, file, line); #else p = realloc(a, sizeof(*a) + limit*size); #endif if (p) { a = (stb__arr *) p; a->limit = limit; } else { // throw an error! } } } a->len = stb_min(a->len, a->limit); *pp = a+1; } void stb__arr_setsize_(void **pp, int size, int limit STB__PARAMS) { void *p = *pp; stb_arr_check2(p); stb__arrsize_(pp, size, limit, stb_arr_len2(p) STB__ARGS); } void stb__arr_setlen_(void **pp, int size, int newlen STB__PARAMS) { void *p = *pp; stb_arr_check2(p); if (stb_arrcurmax2(p) < newlen || p == NULL) { stb__arrsize_(pp, size, newlen, newlen STB__ARGS); } else { stb_arrhead2(p)->len = newlen; } } void stb__arr_addlen_(void **p, int size, int addlen STB__PARAMS) { stb__arr_setlen_(p, size, stb_arr_len2(*p) + addlen STB__ARGS); } void stb__arr_insertn_(void **pp, int size, int i, int n STB__PARAMS) { void *p = *pp; if (n) { int z; if (p == NULL) { stb__arr_addlen_(pp, size, n STB__ARGS); return; } z = stb_arr_len2(p); stb__arr_addlen_(&p, size, n STB__ARGS); memmove((char *) p + (i+n)*size, (char *) p + i*size, size * (z-i)); } *pp = p; } void stb__arr_deleten_(void **pp, int size, int i, int n STB__PARAMS) { void *p = *pp; if (n) { memmove((char *) p + i*size, (char *) p + (i+n)*size, size * (stb_arr_len2(p)-(i+n))); stb_arrhead2(p)->len -= n; } *pp = p; } #endif ////////////////////////////////////////////////////////////////////////////// // // Hashing // // typical use for this is to make a power-of-two hash table. // // let N = size of table (2^n) // let H = stb_hash(str) // let S = stb_rehash(H) | 1 // // then hash probe sequence P(i) for i=0..N-1 // P(i) = (H + S*i) & (N-1) // // the idea is that H has 32 bits of hash information, but the // table has only, say, 2^20 entries so only uses 20 of the bits. // then by rehashing the original H we get 2^12 different probe // sequences for a given initial probe location. (So it's optimal // for 64K tables and its optimality decreases past that.) // // ok, so I've added something that generates _two separate_ // 32-bit hashes simultaneously which should scale better to // very large tables. STB_EXTERN unsigned int stb_hash(char *str); STB_EXTERN unsigned int stb_hashptr(void *p); STB_EXTERN unsigned int stb_hashlen(char *str, int len); STB_EXTERN unsigned int stb_rehash_improved(unsigned int v); STB_EXTERN unsigned int stb_hash_fast(void *p, int len); STB_EXTERN unsigned int stb_hash2(char *str, unsigned int *hash2_ptr); STB_EXTERN unsigned int stb_hash_number(unsigned int hash); #define stb_rehash(x) ((x) + ((x) >> 6) + ((x) >> 19)) #ifdef STB_DEFINE unsigned int stb_hash(char *str) { unsigned int hash = 0; while (*str) hash = (hash << 7) + (hash >> 25) + *str++; return hash + (hash >> 16); } unsigned int stb_hashlen(char *str, int len) { unsigned int hash = 0; while (len-- > 0 && *str) hash = (hash << 7) + (hash >> 25) + *str++; return hash + (hash >> 16); } unsigned int stb_hashptr(void *p) { unsigned int x = (unsigned int) p; // typically lacking in low bits and high bits x = stb_rehash(x); x += x << 16; // pearson's shuffle x ^= x << 3; x += x >> 5; x ^= x << 2; x += x >> 15; x ^= x << 10; return stb_rehash(x); } unsigned int stb_rehash_improved(unsigned int v) { return stb_hashptr((void *)(size_t) v); } unsigned int stb_hash2(char *str, unsigned int *hash2_ptr) { unsigned int hash1 = 0x3141592c; unsigned int hash2 = 0x77f044ed; while (*str) { hash1 = (hash1 << 7) + (hash1 >> 25) + *str; hash2 = (hash2 << 11) + (hash2 >> 21) + *str; ++str; } *hash2_ptr = hash2 + (hash1 >> 16); return hash1 + (hash2 >> 16); } // Paul Hsieh hash #define stb__get16_slow(p) ((p)[0] + ((p)[1] << 8)) #if defined(_MSC_VER) #define stb__get16(p) (*((unsigned short *) (p))) #else #define stb__get16(p) stb__get16_slow(p) #endif unsigned int stb_hash_fast(void *p, int len) { unsigned char *q = (unsigned char *) p; unsigned int hash = len; if (len <= 0 || q == NULL) return 0; /* Main loop */ if (((int) q & 1) == 0) { for (;len > 3; len -= 4) { unsigned int val; hash += stb__get16(q); val = (stb__get16(q+2) << 11); hash = (hash << 16) ^ hash ^ val; q += 4; hash += hash >> 11; } } else { for (;len > 3; len -= 4) { unsigned int val; hash += stb__get16_slow(q); val = (stb__get16_slow(q+2) << 11); hash = (hash << 16) ^ hash ^ val; q += 4; hash += hash >> 11; } } /* Handle end cases */ switch (len) { case 3: hash += stb__get16_slow(q); hash ^= hash << 16; hash ^= q[2] << 18; hash += hash >> 11; break; case 2: hash += stb__get16_slow(q); hash ^= hash << 11; hash += hash >> 17; break; case 1: hash += q[0]; hash ^= hash << 10; hash += hash >> 1; break; case 0: break; } /* Force "avalanching" of final 127 bits */ hash ^= hash << 3; hash += hash >> 5; hash ^= hash << 4; hash += hash >> 17; hash ^= hash << 25; hash += hash >> 6; return hash; } unsigned int stb_hash_number(unsigned int hash) { hash ^= hash << 3; hash += hash >> 5; hash ^= hash << 4; hash += hash >> 17; hash ^= hash << 25; hash += hash >> 6; return hash; } #endif ////////////////////////////////////////////////////////////////////////////// // // Perfect hashing for ints/pointers // // This is mainly useful for making faster pointer-indexed tables // that don't change frequently. E.g. for stb_ischar(). // typedef struct { stb_uint32 addend; stb_uint multiplicand; stb_uint b_mask; stb_uint8 small_bmap[16]; stb_uint16 *large_bmap; stb_uint table_mask; stb_uint32 *table; } stb_perfect; STB_EXTERN int stb_perfect_create(stb_perfect *,unsigned int*,int n); STB_EXTERN void stb_perfect_destroy(stb_perfect *); STB_EXTERN int stb_perfect_hash(stb_perfect *, unsigned int x); extern int stb_perfect_hash_max_failures; #ifdef STB_DEFINE int stb_perfect_hash_max_failures; int stb_perfect_hash(stb_perfect *p, unsigned int x) { stb_uint m = x * p->multiplicand; stb_uint y = x >> 16; stb_uint bv = (m >> 24) + y; stb_uint av = (m + y) >> 12; if (p->table == NULL) return -1; // uninitialized table fails bv &= p->b_mask; av &= p->table_mask; if (p->large_bmap) av ^= p->large_bmap[bv]; else av ^= p->small_bmap[bv]; return p->table[av] == x ? av : -1; } static void stb__perfect_prehash(stb_perfect *p, stb_uint x, stb_uint16 *a, stb_uint16 *b) { stb_uint m = x * p->multiplicand; stb_uint y = x >> 16; stb_uint bv = (m >> 24) + y; stb_uint av = (m + y) >> 12; bv &= p->b_mask; av &= p->table_mask; *b = bv; *a = av; } static unsigned long stb__perfect_rand(void) { static unsigned long stb__rand; stb__rand = stb__rand * 2147001325 + 715136305; return 0x31415926 ^ ((stb__rand >> 16) + (stb__rand << 16)); } typedef struct { unsigned short count; unsigned short b; unsigned short map; unsigned short *entries; } stb__slot; static int stb__slot_compare(const void *p, const void *q) { stb__slot *a = (stb__slot *) p; stb__slot *b = (stb__slot *) q; return a->count > b->count ? -1 : a->count < b->count; // sort large to small } int stb_perfect_create(stb_perfect *p, unsigned int *v, int n) { unsigned int buffer1[64], buffer2[64], buffer3[64], buffer4[64], buffer5[32]; unsigned short *as = (unsigned short *) stb_temp(buffer1, sizeof(*v)*n); unsigned short *bs = (unsigned short *) stb_temp(buffer2, sizeof(*v)*n); unsigned short *entries = (unsigned short *) stb_temp(buffer4, sizeof(*entries) * n); int size = 1 << stb_log2_ceil(n), bsize=8; int failure = 0,i,j,k; assert(n <= 32768); p->large_bmap = NULL; for(;;) { stb__slot *bcount = (stb__slot *) stb_temp(buffer3, sizeof(*bcount) * bsize); unsigned short *bloc = (unsigned short *) stb_temp(buffer5, sizeof(*bloc) * bsize); unsigned short *e; int bad=0; p->addend = stb__perfect_rand(); p->multiplicand = stb__perfect_rand() | 1; p->table_mask = size-1; p->b_mask = bsize-1; p->table = (stb_uint32 *) malloc(size * sizeof(*p->table)); for (i=0; i < bsize; ++i) { bcount[i].b = i; bcount[i].count = 0; bcount[i].map = 0; } for (i=0; i < n; ++i) { stb__perfect_prehash(p, v[i], as+i, bs+i); ++bcount[bs[i]].count; } qsort(bcount, bsize, sizeof(*bcount), stb__slot_compare); e = entries; // now setup up their entries index for (i=0; i < bsize; ++i) { bcount[i].entries = e; e += bcount[i].count; bcount[i].count = 0; bloc[bcount[i].b] = i; } // now fill them out for (i=0; i < n; ++i) { int b = bs[i]; int w = bloc[b]; bcount[w].entries[bcount[w].count++] = i; } stb_tempfree(buffer5,bloc); // verify for (i=0; i < bsize; ++i) for (j=0; j < bcount[i].count; ++j) assert(bs[bcount[i].entries[j]] == bcount[i].b); memset(p->table, 0, size*sizeof(*p->table)); // check if any b has duplicate a for (i=0; i < bsize; ++i) { if (bcount[i].count > 1) { for (j=0; j < bcount[i].count; ++j) { if (p->table[as[bcount[i].entries[j]]]) bad = 1; p->table[as[bcount[i].entries[j]]] = 1; } for (j=0; j < bcount[i].count; ++j) { p->table[as[bcount[i].entries[j]]] = 0; } if (bad) break; } } if (!bad) { // go through the bs and populate the table, first fit for (i=0; i < bsize; ++i) { if (bcount[i].count) { // go through the candidate table[b] values for (j=0; j < size; ++j) { // go through the a values and see if they fit for (k=0; k < bcount[i].count; ++k) { int a = as[bcount[i].entries[k]]; if (p->table[(a^j)&p->table_mask]) { break; // fails } } // if succeeded, accept if (k == bcount[i].count) { bcount[i].map = j; for (k=0; k < bcount[i].count; ++k) { int a = as[bcount[i].entries[k]]; p->table[(a^j)&p->table_mask] = 1; } break; } } if (j == size) break; // no match for i'th entry, so break out in failure } } if (i == bsize) { // success... fill out map if (bsize <= 16 && size <= 256) { p->large_bmap = NULL; for (i=0; i < bsize; ++i) p->small_bmap[bcount[i].b] = (stb_uint8) bcount[i].map; } else { p->large_bmap = (unsigned short *) malloc(sizeof(*p->large_bmap) * bsize); for (i=0; i < bsize; ++i) p->large_bmap[bcount[i].b] = bcount[i].map; } // initialize table to v[0], so empty slots will fail for (i=0; i < size; ++i) p->table[i] = v[0]; for (i=0; i < n; ++i) if (p->large_bmap) p->table[as[i] ^ p->large_bmap[bs[i]]] = v[i]; else p->table[as[i] ^ p->small_bmap[bs[i]]] = v[i]; // and now validate that none of them collided for (i=0; i < n; ++i) assert(stb_perfect_hash(p, v[i]) >= 0); stb_tempfree(buffer3, bcount); break; } } free(p->table); p->table = NULL; stb_tempfree(buffer3, bcount); ++failure; if (failure >= 4 && bsize < size) bsize *= 2; if (failure >= 8 && (failure & 3) == 0 && size < 4*n) { size *= 2; bsize *= 2; } if (failure == 6) { // make sure the input data is unique, so we don't infinite loop unsigned int *data = (unsigned int *) stb_temp(buffer3, n * sizeof(*data)); memcpy(data, v, sizeof(*data) * n); qsort(data, n, sizeof(*data), stb_intcmp(0)); for (i=1; i < n; ++i) { if (data[i] == data[i-1]) size = 0; // size is return value, so 0 it } stb_tempfree(buffer3, data); if (!size) break; } } if (failure > stb_perfect_hash_max_failures) stb_perfect_hash_max_failures = failure; stb_tempfree(buffer1, as); stb_tempfree(buffer2, bs); stb_tempfree(buffer4, entries); return size; } void stb_perfect_destroy(stb_perfect *p) { if (p->large_bmap) free(p->large_bmap); if (p->table ) free(p->table); p->large_bmap = NULL; p->table = NULL; p->b_mask = 0; p->table_mask = 0; } #endif ////////////////////////////////////////////////////////////////////////////// // // Perfect hash clients STB_EXTERN int stb_ischar(char s, char *set); #ifdef STB_DEFINE int stb_ischar(char c, char *set) { static unsigned char bit[8] = { 1,2,4,8,16,32,64,128 }; static stb_perfect p; static unsigned char (*tables)[256]; static char ** sets = NULL; int z = stb_perfect_hash(&p, (int) set); if (z < 0) { int i,k,n,j,f; // special code that means free all existing data if (set == NULL) { stb_arr_free(sets); free(tables); tables = NULL; stb_perfect_destroy(&p); return 0; } stb_arr_push(sets, set); stb_perfect_destroy(&p); n = stb_perfect_create(&p, (unsigned int *) (char **) sets, stb_arr_len(sets)); assert(n != 0); k = (n+7) >> 3; tables = (unsigned char (*)[256]) realloc(tables, sizeof(*tables) * k); memset(tables, 0, sizeof(*tables) * k); for (i=0; i < stb_arr_len(sets); ++i) { k = stb_perfect_hash(&p, (int) sets[i]); assert(k >= 0); n = k >> 3; f = bit[k&7]; for (j=0; !j || sets[i][j]; ++j) { tables[n][(unsigned char) sets[i][j]] |= f; } } z = stb_perfect_hash(&p, (int) set); } return tables[z >> 3][(unsigned char) c] & bit[z & 7]; } #endif ////////////////////////////////////////////////////////////////////////////// // // Instantiated data structures // // This is an attempt to implement a templated data structure. // // Hash table: call stb_define_hash(TYPE,N,KEY,K1,K2,HASH,VALUE) // TYPE -- will define a structure type containing the hash table // N -- the name, will prefix functions named: // N create // N destroy // N get // N set, N add, N update, // N remove // KEY -- the type of the key. 'x == y' must be valid // K1,K2 -- keys never used by the app, used as flags in the hashtable // HASH -- a piece of code ending with 'return' that hashes key 'k' // VALUE -- the type of the value. 'x = y' must be valid // // Note that stb_define_hash_base can be used to define more sophisticated // hash tables, e.g. those that make copies of the key or use special // comparisons (e.g. strcmp). #define STB_(prefix,name) stb__##prefix##name #define STB__(prefix,name) prefix##name #define STB__use(x) x #define STB__skip(x) #define stb_declare_hash(PREFIX,TYPE,N,KEY,VALUE) \ typedef struct stb__st_##TYPE TYPE;\ PREFIX int STB__(N, init)(TYPE *h, int count);\ PREFIX int STB__(N, memory_usage)(TYPE *h);\ PREFIX TYPE * STB__(N, create)(void);\ PREFIX TYPE * STB__(N, copy)(TYPE *h);\ PREFIX void STB__(N, destroy)(TYPE *h);\ PREFIX int STB__(N,get_flag)(TYPE *a, KEY k, VALUE *v);\ PREFIX VALUE STB__(N,get)(TYPE *a, KEY k);\ PREFIX int STB__(N, set)(TYPE *a, KEY k, VALUE v);\ PREFIX int STB__(N, add)(TYPE *a, KEY k, VALUE v);\ PREFIX int STB__(N, update)(TYPE*a,KEY k,VALUE v);\ PREFIX int STB__(N, remove)(TYPE *a, KEY k, VALUE *v); #define STB_nocopy(x) (x) #define STB_nodelete(x) 0 #define STB_nofields #define STB_nonullvalue(x) #define STB_nullvalue(x) x #define STB_safecompare(x) x #define STB_nosafe(x) #define STB_noprefix #ifdef __GNUC__ #define STB__nogcc(x) #else #define STB__nogcc(x) x #endif #define stb_define_hash_base(PREFIX,TYPE,FIELDS,N,NC,LOAD_FACTOR, \ KEY,EMPTY,DEL,COPY,DISPOSE,SAFE, \ VCOMPARE,CCOMPARE,HASH, \ VALUE,HASVNULL,VNULL) \ \ typedef struct \ { \ KEY k; \ VALUE v; \ } STB_(N,_hashpair); \ \ STB__nogcc( typedef struct stb__st_##TYPE TYPE; ) \ struct stb__st_##TYPE { \ FIELDS \ STB_(N,_hashpair) *table; \ unsigned int mask; \ int count, limit; \ int deleted; \ \ int delete_threshhold; \ int grow_threshhold; \ int shrink_threshhold; \ unsigned char alloced, has_empty, has_del; \ VALUE ev; VALUE dv; \ }; \ \ static unsigned int STB_(N, hash)(KEY k) \ { \ HASH \ } \ \ PREFIX int STB__(N, init)(TYPE *h, int count) \ { \ int i; \ if (count < 4) count = 4; \ h->limit = count; \ h->count = 0; \ h->mask = count-1; \ h->deleted = 0; \ h->grow_threshhold = (int) (count * LOAD_FACTOR); \ h->has_empty = h->has_del = 0; \ h->alloced = 0; \ if (count <= 64) \ h->shrink_threshhold = 0; \ else \ h->shrink_threshhold = (int) (count * (LOAD_FACTOR/2.25)); \ h->delete_threshhold = (int) (count * (1-LOAD_FACTOR)/2); \ h->table = (STB_(N,_hashpair)*) malloc(sizeof(h->table[0]) * count); \ if (h->table == NULL) return 0; \ /* ideally this gets turned into a memset32 automatically */ \ for (i=0; i < count; ++i) \ h->table[i].k = EMPTY; \ return 1; \ } \ \ PREFIX int STB__(N, memory_usage)(TYPE *h) \ { \ return sizeof(*h) + h->limit * sizeof(h->table[0]); \ } \ \ PREFIX TYPE * STB__(N, create)(void) \ { \ TYPE *h = (TYPE *) malloc(sizeof(*h)); \ if (h) { \ if (STB__(N, init)(h, 16)) \ h->alloced = 1; \ else { free(h); h=NULL; } \ } \ return h; \ } \ \ PREFIX void STB__(N, destroy)(TYPE *a) \ { \ int i; \ for (i=0; i < a->limit; ++i) \ if (!CCOMPARE(a->table[i].k,EMPTY) && !CCOMPARE(a->table[i].k, DEL)) \ DISPOSE(a->table[i].k); \ free(a->table); \ if (a->alloced) \ free(a); \ } \ \ static void STB_(N, rehash)(TYPE *a, int count); \ \ PREFIX int STB__(N,get_flag)(TYPE *a, KEY k, VALUE *v) \ { \ unsigned int h = STB_(N, hash)(k); \ unsigned int n = h & a->mask, s; \ if (CCOMPARE(k,EMPTY)){ if (a->has_empty) *v = a->ev; return a->has_empty;}\ if (CCOMPARE(k,DEL)) { if (a->has_del ) *v = a->dv; return a->has_del; }\ if (CCOMPARE(a->table[n].k,EMPTY)) return 0; \ SAFE(if (!CCOMPARE(a->table[n].k,DEL))) \ if (VCOMPARE(a->table[n].k,k)) { *v = a->table[n].v; return 1; } \ s = stb_rehash(h) | 1; \ for(;;) { \ n = (n + s) & a->mask; \ if (CCOMPARE(a->table[n].k,EMPTY)) return 0; \ SAFE(if (CCOMPARE(a->table[n].k,DEL)) continue;) \ if (VCOMPARE(a->table[n].k,k)) \ { *v = a->table[n].v; return 1; } \ } \ } \ \ HASVNULL( \ PREFIX VALUE STB__(N,get)(TYPE *a, KEY k) \ { \ VALUE v; \ if (STB__(N,get_flag)(a,k,&v)) return v; \ else return VNULL; \ } \ ) \ \ PREFIX int STB__(N,getkey)(TYPE *a, KEY k, KEY *kout) \ { \ unsigned int h = STB_(N, hash)(k); \ unsigned int n = h & a->mask, s; \ if (CCOMPARE(k,EMPTY)||CCOMPARE(k,DEL)) return 0; \ if (CCOMPARE(a->table[n].k,EMPTY)) return 0; \ SAFE(if (!CCOMPARE(a->table[n].k,DEL))) \ if (VCOMPARE(a->table[n].k,k)) { *kout = a->table[n].k; return 1; } \ s = stb_rehash(h) | 1; \ for(;;) { \ n = (n + s) & a->mask; \ if (CCOMPARE(a->table[n].k,EMPTY)) return 0; \ SAFE(if (CCOMPARE(a->table[n].k,DEL)) continue;) \ if (VCOMPARE(a->table[n].k,k)) \ { *kout = a->table[n].k; return 1; } \ } \ } \ \ static int STB_(N,addset)(TYPE *a, KEY k, VALUE v, \ int allow_new, int allow_old, int copy) \ { \ unsigned int h = STB_(N, hash)(k); \ unsigned int n = h & a->mask; \ int b = -1; \ if (CCOMPARE(k,EMPTY)) { \ if (a->has_empty ? allow_old : allow_new) { \ n=a->has_empty; a->ev = v; a->has_empty = 1; return !n; \ } else return 0; \ } \ if (CCOMPARE(k,DEL)) { \ if (a->has_del ? allow_old : allow_new) { \ n=a->has_del; a->dv = v; a->has_del = 1; return !n; \ } else return 0; \ } \ if (!CCOMPARE(a->table[n].k, EMPTY)) { \ unsigned int s; \ if (CCOMPARE(a->table[n].k, DEL)) \ b = n; \ else if (VCOMPARE(a->table[n].k,k)) { \ if (allow_old) \ a->table[n].v = v; \ return !allow_new; \ } \ s = stb_rehash(h) | 1; \ for(;;) { \ n = (n + s) & a->mask; \ if (CCOMPARE(a->table[n].k, EMPTY)) break; \ if (CCOMPARE(a->table[n].k, DEL)) { \ if (b < 0) b = n; \ } else if (VCOMPARE(a->table[n].k,k)) { \ if (allow_old) \ a->table[n].v = v; \ return !allow_new; \ } \ } \ } \ if (!allow_new) return 0; \ if (b < 0) b = n; else --a->deleted; \ a->table[b].k = copy ? COPY(k) : k; \ a->table[b].v = v; \ ++a->count; \ if (a->count > a->grow_threshhold) \ STB_(N,rehash)(a, a->limit*2); \ return 1; \ } \ \ PREFIX int STB__(N, set)(TYPE *a, KEY k, VALUE v){return STB_(N,addset)(a,k,v,1,1,1);}\ PREFIX int STB__(N, add)(TYPE *a, KEY k, VALUE v){return STB_(N,addset)(a,k,v,1,0,1);}\ PREFIX int STB__(N, update)(TYPE*a,KEY k,VALUE v){return STB_(N,addset)(a,k,v,0,1,1);}\ \ PREFIX int STB__(N, remove)(TYPE *a, KEY k, VALUE *v) \ { \ unsigned int h = STB_(N, hash)(k); \ unsigned int n = h & a->mask, s; \ if (CCOMPARE(k,EMPTY)) { if (a->has_empty) { if(v)*v = a->ev; a->has_empty=0; return 1; } return 0; } \ if (CCOMPARE(k,DEL)) { if (a->has_del ) { if(v)*v = a->dv; a->has_del =0; return 1; } return 0; } \ if (CCOMPARE(a->table[n].k,EMPTY)) return 0; \ if (SAFE(CCOMPARE(a->table[n].k,DEL) || ) !VCOMPARE(a->table[n].k,k)) { \ s = stb_rehash(h) | 1; \ for(;;) { \ n = (n + s) & a->mask; \ if (CCOMPARE(a->table[n].k,EMPTY)) return 0; \ SAFE(if (CCOMPARE(a->table[n].k, DEL)) continue;) \ if (VCOMPARE(a->table[n].k,k)) break; \ } \ } \ DISPOSE(a->table[n].k); \ a->table[n].k = DEL; \ --a->count; \ ++a->deleted; \ if (v != NULL) \ *v = a->table[n].v; \ if (a->count < a->shrink_threshhold) \ STB_(N, rehash)(a, a->limit >> 1); \ else if (a->deleted > a->delete_threshhold) \ STB_(N, rehash)(a, a->limit); \ return 1; \ } \ \ PREFIX TYPE * STB__(NC, copy)(TYPE *a) \ { \ int i; \ TYPE *h = (TYPE *) malloc(sizeof(*h)); \ if (!h) return NULL; \ if (!STB__(N, init)(h, a->limit)) { free(h); return NULL; } \ h->count = a->count; \ h->deleted = a->deleted; \ h->alloced = 1; \ h->ev = a->ev; h->dv = a->dv; \ h->has_empty = a->has_empty; h->has_del = a->has_del; \ memcpy(h->table, a->table, h->limit * sizeof(h->table[0])); \ for (i=0; i < a->limit; ++i) \ if (!CCOMPARE(h->table[i].k,EMPTY) && !CCOMPARE(h->table[i].k,DEL)) \ h->table[i].k = COPY(h->table[i].k); \ return h; \ } \ \ static void STB_(N, rehash)(TYPE *a, int count) \ { \ int i; \ TYPE b; \ STB__(N, init)(&b, count); \ for (i=0; i < a->limit; ++i) \ if (!CCOMPARE(a->table[i].k,EMPTY) && !CCOMPARE(a->table[i].k,DEL)) \ STB_(N,addset)(&b, a->table[i].k, a->table[i].v,1,1,0); \ free(a->table); \ a->table = b.table; \ a->mask = b.mask; \ a->count = b.count; \ a->limit = b.limit; \ a->deleted = b.deleted; \ a->delete_threshhold = b.delete_threshhold; \ a->grow_threshhold = b.grow_threshhold; \ a->shrink_threshhold = b.shrink_threshhold; \ } #define STB_equal(a,b) ((a) == (b)) #define stb_define_hash(TYPE,N,KEY,EMPTY,DEL,HASH,VALUE) \ stb_define_hash_base(STB_noprefix, TYPE,STB_nofields,N,NC,0.85f, \ KEY,EMPTY,DEL,STB_nocopy,STB_nodelete,STB_nosafe, \ STB_equal,STB_equal,HASH, \ VALUE,STB_nonullvalue,0) #define stb_define_hash_vnull(TYPE,N,KEY,EMPTY,DEL,HASH,VALUE,VNULL) \ stb_define_hash_base(STB_noprefix, TYPE,STB_nofields,N,NC,0.85f, \ KEY,EMPTY,DEL,STB_nocopy,STB_nodelete,STB_nosafe, \ STB_equal,STB_equal,HASH, \ VALUE,STB_nullvalue,VNULL) ////////////////////////////////////////////////////////////////////////////// // // stb_ptrmap // // An stb_ptrmap data structure is an O(1) hash table between pointers. One // application is to let you store "extra" data associated with pointers, // which is why it was originally called stb_extra. stb_declare_hash(STB_EXTERN, stb_ptrmap, stb_ptrmap_, void *, void *) stb_declare_hash(STB_EXTERN, stb_idict, stb_idict_, stb_int32, stb_int32) STB_EXTERN void stb_ptrmap_delete(stb_ptrmap *e, void (*free_func)(void *)); STB_EXTERN stb_ptrmap *stb_ptrmap_new(void); STB_EXTERN stb_idict * stb_idict_new_size(int size); STB_EXTERN void stb_idict_remove_all(stb_idict *e); #ifdef STB_DEFINE #define STB_EMPTY ((void *) 2) #define STB_EDEL ((void *) 6) stb_define_hash_base(STB_noprefix,stb_ptrmap, STB_nofields, stb_ptrmap_,stb_ptrmap_,0.85f, void *,STB_EMPTY,STB_EDEL,STB_nocopy,STB_nodelete,STB_nosafe, STB_equal,STB_equal,return stb_hashptr(k);, void *,STB_nullvalue,NULL) stb_ptrmap *stb_ptrmap_new(void) { return stb_ptrmap_create(); } void stb_ptrmap_delete(stb_ptrmap *e, void (*free_func)(void *)) { int i; if (free_func) for (i=0; i < e->limit; ++i) if (e->table[i].k != STB_EMPTY && e->table[i].k != STB_EDEL) { if (free_func == free) free(e->table[i].v); // allow STB_MALLOC_WRAPPER to operate else free_func(e->table[i].v); } stb_ptrmap_destroy(e); } // extra fields needed for stua_dict #define STB_IEMPTY ((int) 1) #define STB_IDEL ((int) 3) stb_define_hash_base(STB_noprefix, stb_idict, short type; short gc; STB_nofields, stb_idict_,stb_idict_,0.85f, stb_int32,STB_IEMPTY,STB_IDEL,STB_nocopy,STB_nodelete,STB_nosafe, STB_equal,STB_equal, return stb_rehash_improved(k);,stb_int32,STB_nonullvalue,0) stb_idict * stb_idict_new_size(int size) { stb_idict *e = (stb_idict *) malloc(sizeof(*e)); if (e) { if (!stb_is_pow2(size)) size = 1 << stb_log2_ceil(size); stb_idict_init(e, size); e->alloced = 1; } return e; } void stb_idict_remove_all(stb_idict *e) { int n; for (n=0; n < e->limit; ++n) e->table[n].k = STB_IEMPTY; e->has_empty = e->has_del = 0; } #endif ////////////////////////////////////////////////////////////////////////////// // // stb_sparse_ptr_matrix // // An stb_ptrmap data structure is an O(1) hash table storing an arbitrary // block of data for a given pair of pointers. // // If create=0, returns typedef struct stb__st_stb_spmatrix stb_spmatrix; STB_EXTERN stb_spmatrix * stb_sparse_ptr_matrix_new(int val_size); STB_EXTERN void stb_sparse_ptr_matrix_free(stb_spmatrix *z); STB_EXTERN void * stb_sparse_ptr_matrix_get(stb_spmatrix *z, void *a, void *b, int create); #ifdef STB_DEFINE typedef struct { void *a; void *b; } stb__ptrpair; static stb__ptrpair stb__ptrpair_empty = { (void *) 1, (void *) 1 }; static stb__ptrpair stb__ptrpair_del = { (void *) 2, (void *) 2 }; #define STB__equal_ptrpair(x,y) ((x).a == (y).a && (x).b == (y).b) stb_define_hash_base(static, stb_spmatrix, int val_size; void *arena;, stb__spmatrix_,stb__spmatrix_, 0.85, stb__ptrpair, stb__ptrpair_empty, stb__ptrpair_del, STB_nocopy, STB_nodelete, STB_nosafe, STB__equal_ptrpair, STB__equal_ptrpair, return stb_rehash(stb_hashptr(k.a))+stb_hashptr(k.b);, void *, STB_nullvalue, 0) stb_spmatrix *stb_sparse_ptr_matrix_new(int val_size) { stb_spmatrix *m = stb__spmatrix_create(); if (m) m->val_size = val_size; if (m) m->arena = stb_malloc_global(1); return m; } void stb_sparse_ptr_matrix_free(stb_spmatrix *z) { if (z->arena) stb_free(z->arena); stb__spmatrix_destroy(z); } void *stb_sparse_ptr_matrix_get(stb_spmatrix *z, void *a, void *b, int create) { stb__ptrpair t = { a,b }; void *data = stb__spmatrix_get(z, t); if (!data && create) { data = stb_malloc_raw(z->arena, z->val_size); if (!data) return NULL; memset(data, 0, z->val_size); stb__spmatrix_add(z, t, data); } return data; } #endif ////////////////////////////////////////////////////////////////////////////// // // SDICT: Hash Table for Strings (symbol table) // // if "use_arena=1", then strings will be copied // into blocks and never freed until the sdict is freed; // otherwise they're malloc()ed and free()d on the fly. // (specify use_arena=1 if you never stb_sdict_remove) stb_declare_hash(STB_EXTERN, stb_sdict, stb_sdict_, char *, void *) STB_EXTERN stb_sdict * stb_sdict_new(int use_arena); STB_EXTERN stb_sdict * stb_sdict_copy(stb_sdict*); STB_EXTERN void stb_sdict_delete(stb_sdict *); STB_EXTERN void * stb_sdict_change(stb_sdict *, char *str, void *p); STB_EXTERN int stb_sdict_count(stb_sdict *d); #define stb_sdict_for(d,i,q,z) \ for(i=0; i < (d)->limit ? q=(d)->table[i].k,z=(d)->table[i].v,1 : 0; ++i) \ if (q==NULL||q==(void *) 1);else // reversed makes macro friendly #ifdef STB_DEFINE #define STB_DEL ((void *) 1) #define STB_SDEL ((char *) 1) #define stb_sdict__copy(x) \ strcpy(a->arena ? stb_malloc_string(a->arena, strlen(x)+1) \ : (char *) malloc(strlen(x)+1), x) #define stb_sdict__dispose(x) if (!a->arena) free(x) stb_define_hash_base(STB_noprefix, stb_sdict, void*arena;, stb_sdict_,stb_sdictinternal_, 0.85f, char *, NULL, STB_SDEL, stb_sdict__copy, stb_sdict__dispose, STB_safecompare, !strcmp, STB_equal, return stb_hash(k);, void *, STB_nullvalue, NULL) int stb_sdict_count(stb_sdict *a) { return a->count; } stb_sdict * stb_sdict_new(int use_arena) { stb_sdict *d = stb_sdict_create(); if (d == NULL) return NULL; d->arena = use_arena ? stb_malloc_global(1) : NULL; return d; } stb_sdict* stb_sdict_copy(stb_sdict *old) { stb_sdict *n; void *old_arena = old->arena; void *new_arena = old_arena ? stb_malloc_global(1) : NULL; old->arena = new_arena; n = stb_sdictinternal_copy(old); old->arena = old_arena; if (n) n->arena = new_arena; else if (new_arena) stb_free(new_arena); return n; } void stb_sdict_delete(stb_sdict *d) { if (d->arena) stb_free(d->arena); stb_sdict_destroy(d); } void * stb_sdict_change(stb_sdict *d, char *str, void *p) { void *q = stb_sdict_get(d, str); stb_sdict_set(d, str, p); return q; } #endif ////////////////////////////////////////////////////////////////////////////// // // Instantiated data structures // // This is an attempt to implement a templated data structure. // What you do is define a struct foo, and then include several // pointer fields to struct foo in your struct. Then you call // the instantiator, which creates the functions that implement // the data structure. This requires massive undebuggable #defines, // so we limit the cases where we do this. // // AA tree is an encoding of a 2-3 tree whereas RB trees encode a 2-3-4 tree; // much simpler code due to fewer cases. #define stb__bst_parent(x) x #define stb__bst_noparent(x) #define stb_bst_fields(N) \ *STB_(N,left), *STB_(N,right); \ unsigned char STB_(N,level) #define stb_bst_fields_parent(N) \ *STB_(N,left), *STB_(N,right), *STB_(N,parent); \ unsigned char STB_(N,level) #define STB__level(N,x) ((x) ? (x)->STB_(N,level) : 0) #define stb_bst_base(TYPE, N, TREE, M, compare, PAR) \ \ static int STB_(N,_compare)(TYPE *p, TYPE *q) \ { \ compare \ } \ \ static void STB_(N,setleft)(TYPE *q, TYPE *v) \ { \ q->STB_(N,left) = v; \ PAR(if (v) v->STB_(N,parent) = q;) \ } \ \ static void STB_(N,setright)(TYPE *q, TYPE *v) \ { \ q->STB_(N,right) = v; \ PAR(if (v) v->STB_(N,parent) = q;) \ } \ \ static TYPE *STB_(N,skew)(TYPE *q) \ { \ if (q == NULL) return q; \ if (q->STB_(N,left) \ && q->STB_(N,left)->STB_(N,level) == q->STB_(N,level)) { \ TYPE *p = q->STB_(N,left); \ STB_(N,setleft)(q, p->STB_(N,right)); \ STB_(N,setright)(p, q); \ return p; \ } \ return q; \ } \ \ static TYPE *STB_(N,split)(TYPE *p) \ { \ TYPE *q = p->STB_(N,right); \ if (q && q->STB_(N,right) \ && q->STB_(N,right)->STB_(N,level) == p->STB_(N,level)) { \ STB_(N,setright)(p, q->STB_(N,left)); \ STB_(N,setleft)(q,p); \ ++q->STB_(N,level); \ return q; \ } \ return p; \ } \ \ TYPE *STB__(N,insert)(TYPE *tree, TYPE *item) \ { \ int c; \ if (tree == NULL) { \ item->STB_(N,left) = NULL; \ item->STB_(N,right) = NULL; \ item->STB_(N,level) = 1; \ PAR(item->STB_(N,parent) = NULL;) \ return item; \ } \ c = STB_(N,_compare)(item,tree); \ if (c == 0) { \ if (item != tree) { \ STB_(N,setleft)(item, tree->STB_(N,left)); \ STB_(N,setright)(item, tree->STB_(N,right)); \ item->STB_(N,level) = tree->STB_(N,level); \ PAR(item->STB_(N,parent) = NULL;) \ } \ return item; \ } \ if (c < 0) \ STB_(N,setleft )(tree, STB__(N,insert)(tree->STB_(N,left), item)); \ else \ STB_(N,setright)(tree, STB__(N,insert)(tree->STB_(N,right), item)); \ tree = STB_(N,skew)(tree); \ tree = STB_(N,split)(tree); \ PAR(tree->STB_(N,parent) = NULL;) \ return tree; \ } \ \ TYPE *STB__(N,remove)(TYPE *tree, TYPE *item) \ { \ static TYPE *delnode, *leaf, *restore; \ if (tree == NULL) return NULL; \ leaf = tree; \ if (STB_(N,_compare)(item, tree) < 0) { \ STB_(N,setleft)(tree, STB__(N,remove)(tree->STB_(N,left), item)); \ } else { \ TYPE *r; \ delnode = tree; \ r = STB__(N,remove)(tree->STB_(N,right), item); \ /* maybe move 'leaf' up to this location */ \ if (restore == tree) { tree = leaf; leaf = restore = NULL; } \ STB_(N,setright)(tree,r); \ assert(tree->STB_(N,right) != tree); \ } \ if (tree == leaf) { \ if (delnode == item) { \ tree = tree->STB_(N,right); \ assert(leaf->STB_(N,left) == NULL); \ /* move leaf (the right sibling) up to delnode */ \ STB_(N,setleft )(leaf, item->STB_(N,left )); \ STB_(N,setright)(leaf, item->STB_(N,right)); \ leaf->STB_(N,level) = item->STB_(N,level); \ if (leaf != item) \ restore = delnode; \ } \ delnode = NULL; \ } else { \ if (STB__level(N,tree->STB_(N,left) ) < tree->STB_(N,level)-1 || \ STB__level(N,tree->STB_(N,right)) < tree->STB_(N,level)-1) { \ --tree->STB_(N,level); \ if (STB__level(N,tree->STB_(N,right)) > tree->STB_(N,level)) \ tree->STB_(N,right)->STB_(N,level) = tree->STB_(N,level); \ tree = STB_(N,skew)(tree); \ STB_(N,setright)(tree, STB_(N,skew)(tree->STB_(N,right))); \ if (tree->STB_(N,right)) \ STB_(N,setright)(tree->STB_(N,right), \ STB_(N,skew)(tree->STB_(N,right)->STB_(N,right))); \ tree = STB_(N,split)(tree); \ if (tree->STB_(N,right)) \ STB_(N,setright)(tree, STB_(N,split)(tree->STB_(N,right))); \ } \ } \ PAR(if (tree) tree->STB_(N,parent) = NULL;) \ return tree; \ } \ \ TYPE *STB__(N,last)(TYPE *tree) \ { \ if (tree) \ while (tree->STB_(N,right)) tree = tree->STB_(N,right); \ return tree; \ } \ \ TYPE *STB__(N,first)(TYPE *tree) \ { \ if (tree) \ while (tree->STB_(N,left)) tree = tree->STB_(N,left); \ return tree; \ } \ \ TYPE *STB__(N,next)(TYPE *tree, TYPE *item) \ { \ TYPE *next = NULL; \ if (item->STB_(N,right)) \ return STB__(N,first)(item->STB_(N,right)); \ PAR( \ while(item->STB_(N,parent)) { \ TYPE *up = item->STB_(N,parent); \ if (up->STB_(N,left) == item) return up; \ item = up; \ } \ return NULL; \ ) \ while (tree != item) { \ if (STB_(N,_compare)(item, tree) < 0) { \ next = tree; \ tree = tree->STB_(N,left); \ } else { \ tree = tree->STB_(N,right); \ } \ } \ return next; \ } \ \ TYPE *STB__(N,prev)(TYPE *tree, TYPE *item) \ { \ TYPE *next = NULL; \ if (item->STB_(N,left)) \ return STB__(N,last)(item->STB_(N,left)); \ PAR( \ while(item->STB_(N,parent)) { \ TYPE *up = item->STB_(N,parent); \ if (up->STB_(N,right) == item) return up; \ item = up; \ } \ return NULL; \ ) \ while (tree != item) { \ if (STB_(N,_compare)(item, tree) < 0) { \ tree = tree->STB_(N,left); \ } else { \ next = tree; \ tree = tree->STB_(N,right); \ } \ } \ return next; \ } \ \ STB__DEBUG( \ void STB__(N,_validate)(TYPE *tree, int root) \ { \ if (tree == NULL) return; \ PAR(if(root) assert(tree->STB_(N,parent) == NULL);) \ assert(STB__level(N,tree->STB_(N,left) ) == tree->STB_(N,level)-1); \ assert(STB__level(N,tree->STB_(N,right)) <= tree->STB_(N,level)); \ assert(STB__level(N,tree->STB_(N,right)) >= tree->STB_(N,level)-1); \ if (tree->STB_(N,right)) { \ assert(STB__level(N,tree->STB_(N,right)->STB_(N,right)) \ != tree->STB_(N,level)); \ PAR(assert(tree->STB_(N,right)->STB_(N,parent) == tree);) \ } \ PAR(if(tree->STB_(N,left)) assert(tree->STB_(N,left)->STB_(N,parent) == tree);) \ STB__(N,_validate)(tree->STB_(N,left) ,0); \ STB__(N,_validate)(tree->STB_(N,right),0); \ } \ ) \ \ typedef struct \ { \ TYPE *root; \ } TREE; \ \ void STB__(M,Insert)(TREE *tree, TYPE *item) \ { tree->root = STB__(N,insert)(tree->root, item); } \ void STB__(M,Remove)(TREE *tree, TYPE *item) \ { tree->root = STB__(N,remove)(tree->root, item); } \ TYPE *STB__(M,Next)(TREE *tree, TYPE *item) \ { return STB__(N,next)(tree->root, item); } \ TYPE *STB__(M,Prev)(TREE *tree, TYPE *item) \ { return STB__(N,prev)(tree->root, item); } \ TYPE *STB__(M,First)(TREE *tree) { return STB__(N,first)(tree->root); } \ TYPE *STB__(M,Last) (TREE *tree) { return STB__(N,last) (tree->root); } \ void STB__(M,Init)(TREE *tree) { tree->root = NULL; } #define stb_bst_find(N,tree,fcompare) \ { \ int c; \ while (tree != NULL) { \ fcompare \ if (c == 0) return tree; \ if (c < 0) tree = tree->STB_(N,left); \ else tree = tree->STB_(N,right); \ } \ return NULL; \ } #define stb_bst_raw(TYPE,N,TREE,M,vfield,VTYPE,compare,PAR) \ stb_bst_base(TYPE,N,TREE,M, \ VTYPE a = p->vfield; VTYPE b = q->vfield; return (compare);, PAR ) \ \ TYPE *STB__(N,find)(TYPE *tree, VTYPE a) \ stb_bst_find(N,tree,VTYPE b = tree->vfield; c = (compare);) \ TYPE *STB__(M,Find)(TREE *tree, VTYPE a) \ { return STB__(N,find)(tree->root, a); } #define stb_bst(TYPE,N,TREE,M,vfield,VTYPE,compare) \ stb_bst_raw(TYPE,N,TREE,M,vfield,VTYPE,compare,stb__bst_noparent) #define stb_bst_parent(TYPE,N,TREE,M,vfield,VTYPE,compare) \ stb_bst_raw(TYPE,N,TREE,M,vfield,VTYPE,compare,stb__bst_parent) ////////////////////////////////////////////////////////////////////////////// // // Pointer Nulling // // This lets you automatically NULL dangling pointers to "registered" // objects. Note that you have to make sure you call the appropriate // functions when you free or realloc blocks of memory that contain // pointers or pointer targets. stb.h can automatically do this for // stb_arr, or for all frees/reallocs if it's wrapping them. // #ifdef STB_NPTR STB_EXTERN void stb_nptr_set(void *address_of_pointer, void *value_to_write); STB_EXTERN void stb_nptr_didset(void *address_of_pointer); STB_EXTERN void stb_nptr_didfree(void *address_being_freed, int len); STB_EXTERN void stb_nptr_free(void *address_being_freed, int len); STB_EXTERN void stb_nptr_didrealloc(void *new_address, void *old_address, int len); STB_EXTERN void stb_nptr_recache(void); // recache all known pointers // do this after pointer sets outside your control, slow #ifdef STB_DEFINE // for fast updating on free/realloc, we need to be able to find // all the objects (pointers and targets) within a given block; // this precludes hashing // we use a three-level hierarchy of memory to minimize storage: // level 1: 65536 pointers to stb__memory_node (always uses 256 KB) // level 2: each stb__memory_node represents a 64K block of memory // with 256 stb__memory_leafs (worst case 64MB) // level 3: each stb__memory_leaf represents 256 bytes of memory // using a list of target locations and a list of pointers // (which are hopefully fairly short normally!) // this approach won't work in 64-bit, which has a much larger address // space. need to redesign #define STB__NPTR_ROOT_LOG2 16 #define STB__NPTR_ROOT_NUM (1 << STB__NPTR_ROOT_LOG2) #define STB__NPTR_ROOT_SHIFT (32 - STB__NPTR_ROOT_LOG2) #define STB__NPTR_NODE_LOG2 5 #define STB__NPTR_NODE_NUM (1 << STB__NPTR_NODE_LOG2) #define STB__NPTR_NODE_MASK (STB__NPTR_NODE_NUM-1) #define STB__NPTR_NODE_SHIFT (STB__NPTR_ROOT_SHIFT - STB__NPTR_NODE_LOG2) #define STB__NPTR_NODE_OFFSET(x) (((x) >> STB__NPTR_NODE_SHIFT) & STB__NPTR_NODE_MASK) typedef struct stb__st_nptr { void *ptr; // address of actual pointer struct stb__st_nptr *next; // next pointer with same target struct stb__st_nptr **prev; // prev pointer with same target, address of 'next' field (or first) struct stb__st_nptr *next_in_block; } stb__nptr; typedef struct stb__st_nptr_target { void *ptr; // address of target stb__nptr *first; // address of first nptr pointing to this struct stb__st_nptr_target *next_in_block; } stb__nptr_target; typedef struct { stb__nptr *pointers; stb__nptr_target *targets; } stb__memory_leaf; typedef struct { stb__memory_leaf *children[STB__NPTR_NODE_NUM]; } stb__memory_node; stb__memory_node *stb__memtab_root[STB__NPTR_ROOT_NUM]; static stb__memory_leaf *stb__nptr_find_leaf(void *mem) { stb_uint32 address = (stb_uint32) mem; stb__memory_node *z = stb__memtab_root[address >> STB__NPTR_ROOT_SHIFT]; if (z) return z->children[STB__NPTR_NODE_OFFSET(address)]; else return NULL; } static void * stb__nptr_alloc(int size) { return stb__realloc_raw(0,size); } static void stb__nptr_free(void *p) { stb__realloc_raw(p,0); } static stb__memory_leaf *stb__nptr_make_leaf(void *mem) { stb_uint32 address = (stb_uint32) mem; stb__memory_node *z = stb__memtab_root[address >> STB__NPTR_ROOT_SHIFT]; stb__memory_leaf *f; if (!z) { int i; z = (stb__memory_node *) stb__nptr_alloc(sizeof(*stb__memtab_root[0])); stb__memtab_root[address >> STB__NPTR_ROOT_SHIFT] = z; for (i=0; i < 256; ++i) z->children[i] = 0; } f = (stb__memory_leaf *) stb__nptr_alloc(sizeof(*f)); z->children[STB__NPTR_NODE_OFFSET(address)] = f; f->pointers = NULL; f->targets = NULL; return f; } static stb__nptr_target *stb__nptr_find_target(void *target, int force) { stb__memory_leaf *p = stb__nptr_find_leaf(target); if (p) { stb__nptr_target *t = p->targets; while (t) { if (t->ptr == target) return t; t = t->next_in_block; } } if (force) { stb__nptr_target *t = (stb__nptr_target*) stb__nptr_alloc(sizeof(*t)); if (!p) p = stb__nptr_make_leaf(target); t->ptr = target; t->first = NULL; t->next_in_block = p->targets; p->targets = t; return t; } else return NULL; } static stb__nptr *stb__nptr_find_pointer(void *ptr, int force) { stb__memory_leaf *p = stb__nptr_find_leaf(ptr); if (p) { stb__nptr *t = p->pointers; while (t) { if (t->ptr == ptr) return t; t = t->next_in_block; } } if (force) { stb__nptr *t = (stb__nptr *) stb__nptr_alloc(sizeof(*t)); if (!p) p = stb__nptr_make_leaf(ptr); t->ptr = ptr; t->next = NULL; t->prev = NULL; t->next_in_block = p->pointers; p->pointers = t; return t; } else return NULL; } void stb_nptr_set(void *address_of_pointer, void *value_to_write) { if (*(void **)address_of_pointer != value_to_write) { *(void **) address_of_pointer = value_to_write; stb_nptr_didset(address_of_pointer); } } void stb_nptr_didset(void *address_of_pointer) { // first unlink from old chain void *new_address; stb__nptr *p = stb__nptr_find_pointer(address_of_pointer, 1); // force building if doesn't exist if (p->prev) { // if p->prev is NULL, we just built it, or it was NULL *(p->prev) = p->next; if (p->next) p->next->prev = p->prev; } // now add to new chain new_address = *(void **)address_of_pointer; if (new_address != NULL) { stb__nptr_target *t = stb__nptr_find_target(new_address, 1); p->next = t->first; if (p->next) p->next->prev = &p->next; p->prev = &t->first; t->first = p; } else { p->prev = NULL; p->next = NULL; } } void stb__nptr_block(void *address, int len, void (*function)(stb__memory_leaf *f, int datum, void *start, void *end), int datum) { void *end_address = (void *) ((char *) address + len - 1); stb__memory_node *n; stb_uint32 start = (stb_uint32) address; stb_uint32 end = start + len - 1; int b0 = start >> STB__NPTR_ROOT_SHIFT; int b1 = end >> STB__NPTR_ROOT_SHIFT; int b=b0,i,e0,e1; e0 = STB__NPTR_NODE_OFFSET(start); if (datum <= 0) { // first block n = stb__memtab_root[b0]; if (n) { if (b0 != b1) e1 = STB__NPTR_NODE_NUM-1; else e1 = STB__NPTR_NODE_OFFSET(end); for (i=e0; i <= e1; ++i) if (n->children[i]) function(n->children[i], datum, address, end_address); } if (b1 > b0) { // blocks other than the first and last block for (b=b0+1; b < b1; ++b) { n = stb__memtab_root[b]; if (n) for (i=0; i <= STB__NPTR_NODE_NUM-1; ++i) if (n->children[i]) function(n->children[i], datum, address, end_address); } // last block n = stb__memtab_root[b1]; if (n) { e1 = STB__NPTR_NODE_OFFSET(end); for (i=0; i <= e1; ++i) if (n->children[i]) function(n->children[i], datum, address, end_address); } } } else { if (b1 > b0) { // last block n = stb__memtab_root[b1]; if (n) { e1 = STB__NPTR_NODE_OFFSET(end); for (i=e1; i >= 0; --i) if (n->children[i]) function(n->children[i], datum, address, end_address); } // blocks other than the first and last block for (b=b1-1; b > b0; --b) { n = stb__memtab_root[b]; if (n) for (i=STB__NPTR_NODE_NUM-1; i >= 0; --i) if (n->children[i]) function(n->children[i], datum, address, end_address); } } // first block n = stb__memtab_root[b0]; if (n) { if (b0 != b1) e1 = STB__NPTR_NODE_NUM-1; else e1 = STB__NPTR_NODE_OFFSET(end); for (i=e1; i >= e0; --i) if (n->children[i]) function(n->children[i], datum, address, end_address); } } } static void stb__nptr_delete_pointers(stb__memory_leaf *f, int offset, void *start, void *end) { stb__nptr **p = &f->pointers; while (*p) { stb__nptr *n = *p; if (n->ptr >= start && n->ptr <= end) { // unlink if (n->prev) { *(n->prev) = n->next; if (n->next) n->next->prev = n->prev; } *p = n->next_in_block; stb__nptr_free(n); } else p = &(n->next_in_block); } } static void stb__nptr_delete_targets(stb__memory_leaf *f, int offset, void *start, void *end) { stb__nptr_target **p = &f->targets; while (*p) { stb__nptr_target *n = *p; if (n->ptr >= start && n->ptr <= end) { // null pointers stb__nptr *z = n->first; while (z) { stb__nptr *y = z->next; z->prev = NULL; z->next = NULL; *(void **) z->ptr = NULL; z = y; } // unlink this target *p = n->next_in_block; stb__nptr_free(n); } else p = &(n->next_in_block); } } void stb_nptr_didfree(void *address_being_freed, int len) { // step one: delete all pointers in this block stb__nptr_block(address_being_freed, len, stb__nptr_delete_pointers, 0); // step two: NULL all pointers to this block; do this second to avoid NULLing deleted pointers stb__nptr_block(address_being_freed, len, stb__nptr_delete_targets, 0); } void stb_nptr_free(void *address_being_freed, int len) { free(address_being_freed); stb_nptr_didfree(address_being_freed, len); } static void stb__nptr_move_targets(stb__memory_leaf *f, int offset, void *start, void *end) { stb__nptr_target **t = &f->targets; while (*t) { stb__nptr_target *n = *t; if (n->ptr >= start && n->ptr <= end) { stb__nptr *z; stb__memory_leaf *f; // unlink n *t = n->next_in_block; // update n to new address n->ptr = (void *) ((char *) n->ptr + offset); f = stb__nptr_find_leaf(n->ptr); if (!f) f = stb__nptr_make_leaf(n->ptr); n->next_in_block = f->targets; f->targets = n; // now go through all pointers and make them point here z = n->first; while (z) { *(void**) z->ptr = n->ptr; z = z->next; } } else t = &(n->next_in_block); } } static void stb__nptr_move_pointers(stb__memory_leaf *f, int offset, void *start, void *end) { stb__nptr **p = &f->pointers; while (*p) { stb__nptr *n = *p; if (n->ptr >= start && n->ptr <= end) { // unlink *p = n->next_in_block; n->ptr = (void *) ((int) n->ptr + offset); // move to new block f = stb__nptr_find_leaf(n->ptr); if (!f) f = stb__nptr_make_leaf(n->ptr); n->next_in_block = f->pointers; f->pointers = n; } else p = &(n->next_in_block); } } void stb_nptr_realloc(void *new_address, void *old_address, int len) { if (new_address == old_address) return; // have to move the pointers first, because moving the targets // requires writing to the pointers-to-the-targets, and if some of those moved too, // we need to make sure we don't write to the old memory // step one: move all pointers within the block stb__nptr_block(old_address, len, stb__nptr_move_pointers, (char *) new_address - (char *) old_address); // step two: move all targets within the block stb__nptr_block(old_address, len, stb__nptr_move_targets, (char *) new_address - (char *) old_address); } void stb_nptr_move(void *new_address, void *old_address) { stb_nptr_realloc(new_address, old_address, 1); } void stb_nptr_recache(void) { int i,j; for (i=0; i < STB__NPTR_ROOT_NUM; ++i) if (stb__memtab_root[i]) for (j=0; j < STB__NPTR_NODE_NUM; ++j) if (stb__memtab_root[i]->children[j]) { stb__nptr *p = stb__memtab_root[i]->children[j]->pointers; while (p) { stb_nptr_didset(p->ptr); p = p->next_in_block; } } } #endif // STB_DEFINE #endif // STB_NPTR ////////////////////////////////////////////////////////////////////////////// // // File Processing // #ifdef _MSC_VER #define stb_rename(x,y) _wrename((const wchar_t *)stb__from_utf8(x), (const wchar_t *)stb__from_utf8_alt(y)) #define stb_mktemp _mktemp #else #define stb_mktemp mktemp #define stb_rename rename #endif STB_EXTERN void stb_fput_varlen64(FILE *f, stb_uint64 v); STB_EXTERN stb_uint64 stb_fget_varlen64(FILE *f); STB_EXTERN int stb_size_varlen64(stb_uint64 v); #define stb_filec (char *) stb_file #define stb_fileu (unsigned char *) stb_file STB_EXTERN void * stb_file(char *filename, size_t *length); STB_EXTERN void * stb_file_max(char *filename, size_t *length); STB_EXTERN size_t stb_filelen(FILE *f); STB_EXTERN int stb_filewrite(char *filename, void *data, size_t length); STB_EXTERN int stb_filewritestr(char *filename, char *data); STB_EXTERN char ** stb_stringfile(char *filename, int *len); STB_EXTERN char ** stb_stringfile_trimmed(char *name, int *len, char comm); STB_EXTERN char * stb_fgets(char *buffer, int buflen, FILE *f); STB_EXTERN char * stb_fgets_malloc(FILE *f); STB_EXTERN int stb_fexists(char *filename); STB_EXTERN int stb_fcmp(char *s1, char *s2); STB_EXTERN int stb_feq(char *s1, char *s2); STB_EXTERN time_t stb_ftimestamp(char *filename); STB_EXTERN int stb_fullpath(char *abs, int abs_size, char *rel); STB_EXTERN FILE * stb_fopen(char *filename, char *mode); STB_EXTERN int stb_fclose(FILE *f, int keep); enum { stb_keep_no = 0, stb_keep_yes = 1, stb_keep_if_different = 2, }; STB_EXTERN int stb_copyfile(char *src, char *dest); STB_EXTERN void stb_fput_varlen64(FILE *f, stb_uint64 v); STB_EXTERN stb_uint64 stb_fget_varlen64(FILE *f); STB_EXTERN int stb_size_varlen64(stb_uint64 v); STB_EXTERN void stb_fwrite32(FILE *f, stb_uint32 datum); STB_EXTERN void stb_fput_varlen (FILE *f, int v); STB_EXTERN void stb_fput_varlenu(FILE *f, unsigned int v); STB_EXTERN int stb_fget_varlen (FILE *f); STB_EXTERN stb_uint stb_fget_varlenu(FILE *f); STB_EXTERN void stb_fput_ranged (FILE *f, int v, int b, stb_uint n); STB_EXTERN int stb_fget_ranged (FILE *f, int b, stb_uint n); STB_EXTERN int stb_size_varlen (int v); STB_EXTERN int stb_size_varlenu(unsigned int v); STB_EXTERN int stb_size_ranged (int b, stb_uint n); STB_EXTERN int stb_fread(void *data, size_t len, size_t count, void *f); STB_EXTERN int stb_fwrite(void *data, size_t len, size_t count, void *f); #if 0 typedef struct { FILE *base_file; char *buffer; int buffer_size; int buffer_off; int buffer_left; } STBF; STB_EXTERN STBF *stb_tfopen(char *filename, char *mode); STB_EXTERN int stb_tfread(void *data, size_t len, size_t count, STBF *f); STB_EXTERN int stb_tfwrite(void *data, size_t len, size_t count, STBF *f); #endif #ifdef STB_DEFINE #if 0 STBF *stb_tfopen(char *filename, char *mode) { STBF *z; FILE *f = fopen(filename, mode); if (!f) return NULL; z = (STBF *) malloc(sizeof(*z)); if (!z) { fclose(f); return NULL; } z->base_file = f; if (!strcmp(mode, "rb") || !strcmp(mode, "wb")) { z->buffer_size = 4096; z->buffer_off = z->buffer_size; z->buffer_left = 0; z->buffer = malloc(z->buffer_size); if (!z->buffer) { free(z); fclose(f); return NULL; } } else { z->buffer = 0; z->buffer_size = 0; z->buffer_left = 0; } return z; } int stb_tfread(void *data, size_t len, size_t count, STBF *f) { int total = len*count, done=0; if (!total) return 0; if (total <= z->buffer_left) { memcpy(data, z->buffer + z->buffer_off, total); z->buffer_off += total; z->buffer_left -= total; return count; } else { char *out = (char *) data; // consume all buffered data memcpy(data, z->buffer + z->buffer_off, z->buffer_left); done = z->buffer_left; out += z->buffer_left; z->buffer_left=0; if (total-done > (z->buffer_size >> 1)) { done += fread(out } } } #endif void stb_fwrite32(FILE *f, stb_uint32 x) { fwrite(&x, 4, 1, f); } #if defined(_MSC_VER) || defined(__MINGW32__) #define stb__stat _stat #else #define stb__stat stat #endif int stb_fexists(char *filename) { struct stb__stat buf; return stb__windows( _wstat((const wchar_t *)stb__from_utf8(filename), &buf), stat(filename,&buf) ) == 0; } time_t stb_ftimestamp(char *filename) { struct stb__stat buf; if (stb__windows( _wstat((const wchar_t *)stb__from_utf8(filename), &buf), stat(filename,&buf) ) == 0) { return buf.st_mtime; } else { return 0; } } size_t stb_filelen(FILE *f) { size_t len, pos; pos = ftell(f); fseek(f, 0, SEEK_END); len = ftell(f); fseek(f, pos, SEEK_SET); return len; } void *stb_file(char *filename, size_t *length) { FILE *f = stb__fopen(filename, "rb"); char *buffer; size_t len, len2; if (!f) return NULL; len = stb_filelen(f); buffer = (char *) malloc(len+2); // nul + extra len2 = fread(buffer, 1, len, f); if (len2 == len) { if (length) *length = len; buffer[len] = 0; } else { free(buffer); buffer = NULL; } fclose(f); return buffer; } int stb_filewrite(char *filename, void *data, size_t length) { FILE *f = stb_fopen(filename, "wb"); if (f) { unsigned char *data_ptr = (unsigned char *) data; size_t remaining = length; while (remaining > 0) { size_t len2 = remaining > 65536 ? 65536 : remaining; size_t len3 = fwrite(data_ptr, 1, len2, f); if (len2 != len3) { fprintf(stderr, "Failed while writing %s\n", filename); break; } remaining -= len2; data_ptr += len2; } stb_fclose(f, stb_keep_if_different); } return f != NULL; } int stb_filewritestr(char *filename, char *data) { return stb_filewrite(filename, data, strlen(data)); } void * stb_file_max(char *filename, size_t *length) { FILE *f = stb__fopen(filename, "rb"); char *buffer; size_t len, maxlen; if (!f) return NULL; maxlen = *length; buffer = (char *) malloc(maxlen+1); len = fread(buffer, 1, maxlen, f); buffer[len] = 0; fclose(f); *length = len; return buffer; } char ** stb_stringfile(char *filename, int *plen) { FILE *f = stb__fopen(filename, "rb"); char *buffer, **list=NULL, *s; size_t len, count, i; if (!f) return NULL; len = stb_filelen(f); buffer = (char *) malloc(len+1); len = fread(buffer, 1, len, f); buffer[len] = 0; fclose(f); // two passes through: first time count lines, second time set them for (i=0; i < 2; ++i) { s = buffer; if (i == 1) list[0] = s; count = 1; while (*s) { if (*s == '\n' || *s == '\r') { // detect if both cr & lf are together int crlf = (s[0] + s[1]) == ('\n' + '\r'); if (i == 1) *s = 0; if (crlf) ++s; if (s[1]) { // it's not over yet if (i == 1) list[count] = s+1; ++count; } } ++s; } if (i == 0) { list = (char **) malloc(sizeof(*list) * (count+1) + len+1); if (!list) return NULL; list[count] = 0; // recopy the file so there's just a single allocation to free memcpy(&list[count+1], buffer, len+1); free(buffer); buffer = (char *) &list[count+1]; if (plen) *plen = count; } } return list; } char ** stb_stringfile_trimmed(char *name, int *len, char comment) { int i,n,o=0; char **s = stb_stringfile(name, &n); if (s == NULL) return NULL; for (i=0; i < n; ++i) { char *p = stb_skipwhite(s[i]); if (*p && *p != comment) s[o++] = p; } s[o] = NULL; if (len) *len = o; return s; } char * stb_fgets(char *buffer, int buflen, FILE *f) { char *p; buffer[0] = 0; p = fgets(buffer, buflen, f); if (p) { int n = strlen(p)-1; if (n >= 0) if (p[n] == '\n') p[n] = 0; } return p; } char * stb_fgets_malloc(FILE *f) { // avoid reallocing for small strings char quick_buffer[800]; quick_buffer[sizeof(quick_buffer)-2] = 0; if (!fgets(quick_buffer, sizeof(quick_buffer), f)) return NULL; if (quick_buffer[sizeof(quick_buffer)-2] == 0) { int n = strlen(quick_buffer); if (n > 0 && quick_buffer[n-1] == '\n') quick_buffer[n-1] = 0; return strdup(quick_buffer); } else { char *p; char *a = strdup(quick_buffer); int len = sizeof(quick_buffer)-1; while (!feof(f)) { if (a[len-1] == '\n') break; a = (char *) realloc(a, len*2); p = &a[len]; p[len-2] = 0; if (!fgets(p, len, f)) break; if (p[len-2] == 0) { len += strlen(p); break; } len = len + (len-1); } if (a[len-1] == '\n') a[len-1] = 0; return a; } } int stb_fullpath(char *abs, int abs_size, char *rel) { #ifdef _MSC_VER return _fullpath(abs, rel, abs_size) != NULL; #else if (rel[0] == '/' || rel[0] == '~') { if ((int) strlen(rel) >= abs_size) return 0; strcpy(abs,rel); return STB_TRUE; } else { int n; getcwd(abs, abs_size); n = strlen(abs); if (n+(int) strlen(rel)+2 <= abs_size) { abs[n] = '/'; strcpy(abs+n+1, rel); return STB_TRUE; } else { return STB_FALSE; } } #endif } static int stb_fcmp_core(FILE *f, FILE *g) { char buf1[1024],buf2[1024]; int n1,n2, res=0; while (1) { n1 = fread(buf1, 1, sizeof(buf1), f); n2 = fread(buf2, 1, sizeof(buf2), g); res = memcmp(buf1,buf2,stb_min(n1,n2)); if (res) break; if (n1 != n2) { res = n1 < n2 ? -1 : 1; break; } if (n1 == 0) break; } fclose(f); fclose(g); return res; } int stb_fcmp(char *s1, char *s2) { FILE *f = stb__fopen(s1, "rb"); FILE *g = stb__fopen(s2, "rb"); if (f == NULL || g == NULL) { if (f) fclose(f); if (g) { fclose(g); return STB_TRUE; } return f != NULL; } return stb_fcmp_core(f,g); } int stb_feq(char *s1, char *s2) { FILE *f = stb__fopen(s1, "rb"); FILE *g = stb__fopen(s2, "rb"); if (f == NULL || g == NULL) { if (f) fclose(f); if (g) fclose(g); return f == g; } // feq is faster because it shortcuts if they're different length if (stb_filelen(f) != stb_filelen(g)) { fclose(f); fclose(g); return 0; } return !stb_fcmp_core(f,g); } static stb_ptrmap *stb__files; typedef struct { char *temp_name; char *name; int errors; } stb__file_data; FILE * stb_fopen(char *filename, char *mode) { FILE *f; char name_full[4096]; char temp_full[sizeof(name_full) + 12]; int p; #ifdef _MSC_VER int j; #endif if (mode[0] != 'w' && !strchr(mode, '+')) return stb__fopen(filename, mode); // save away the full path to the file so if the program // changes the cwd everything still works right! unix has // better ways to do this, but we have to work in windows name_full[0] = '\0'; // stb_fullpath reads name_full[0] if (stb_fullpath(name_full, sizeof(name_full), filename)==0) return 0; // try to generate a temporary file in the same directory p = strlen(name_full)-1; while (p > 0 && name_full[p] != '/' && name_full[p] != '\\' && name_full[p] != ':' && name_full[p] != '~') --p; ++p; memcpy(temp_full, name_full, p); #ifdef _MSC_VER // try multiple times to make a temp file... just in // case some other process makes the name first for (j=0; j < 32; ++j) { strcpy(temp_full+p, "stmpXXXXXX"); if (stb_mktemp(temp_full) == NULL) return 0; f = fopen(temp_full, mode); if (f != NULL) break; } #else { strcpy(temp_full+p, "stmpXXXXXX"); #ifdef __MINGW32__ int fd = open(mktemp(temp_full), O_RDWR); #else int fd = mkstemp(temp_full); #endif if (fd == -1) return NULL; f = fdopen(fd, mode); if (f == NULL) { unlink(temp_full); close(fd); return NULL; } } #endif if (f != NULL) { stb__file_data *d = (stb__file_data *) malloc(sizeof(*d)); if (!d) { assert(0); /* NOTREACHED */fclose(f); return NULL; } if (stb__files == NULL) stb__files = stb_ptrmap_create(); d->temp_name = strdup(temp_full); d->name = strdup(name_full); d->errors = 0; stb_ptrmap_add(stb__files, f, d); return f; } return NULL; } int stb_fclose(FILE *f, int keep) { stb__file_data *d; int ok = STB_FALSE; if (f == NULL) return 0; if (ferror(f)) keep = stb_keep_no; fclose(f); if (stb__files && stb_ptrmap_remove(stb__files, f, (void **) &d)) { if (stb__files->count == 0) { stb_ptrmap_destroy(stb__files); stb__files = NULL; } } else return STB_TRUE; // not special if (keep == stb_keep_if_different) { // check if the files are identical if (stb_feq(d->name, d->temp_name)) { keep = stb_keep_no; ok = STB_TRUE; // report success if no change } } if (keep != stb_keep_no) { if (stb_fexists(d->name) && remove(d->name)) { // failed to delete old, so don't keep new keep = stb_keep_no; } else { if (!stb_rename(d->temp_name, d->name)) ok = STB_TRUE; else keep=stb_keep_no; } } if (keep == stb_keep_no) remove(d->temp_name); free(d->temp_name); free(d->name); free(d); return ok; } int stb_copyfile(char *src, char *dest) { char raw_buffer[1024]; char *buffer; int buf_size = 65536; FILE *f, *g; // if file already exists at destination, do nothing if (stb_feq(src, dest)) return STB_TRUE; // open file f = stb__fopen(src, "rb"); if (f == NULL) return STB_FALSE; // open file for writing g = stb__fopen(dest, "wb"); if (g == NULL) { fclose(f); return STB_FALSE; } buffer = (char *) malloc(buf_size); if (buffer == NULL) { buffer = raw_buffer; buf_size = sizeof(raw_buffer); } while (!feof(f)) { int n = fread(buffer, 1, buf_size, f); if (n != 0) fwrite(buffer, 1, n, g); } fclose(f); if (buffer != raw_buffer) free(buffer); fclose(g); return STB_TRUE; } // varlen: // v' = (v >> 31) + (v < 0 ? ~v : v)<<1; // small abs(v) => small v' // output v as big endian v'+k for v' <= k: // 1 byte : v' <= 0x00000080 ( -64 <= v < 64) 7 bits // 2 bytes: v' <= 0x00004000 (-8192 <= v < 8192) 14 bits // 3 bytes: v' <= 0x00200000 21 bits // 4 bytes: v' <= 0x10000000 28 bits // the number of most significant 1-bits in the first byte // equals the number of bytes after the first #define stb__varlen_xform(v) (v<0 ? (~v << 1)+1 : (v << 1)) int stb_size_varlen(int v) { return stb_size_varlenu(stb__varlen_xform(v)); } int stb_size_varlenu(unsigned int v) { if (v < 0x00000080) return 1; if (v < 0x00004000) return 2; if (v < 0x00200000) return 3; if (v < 0x10000000) return 4; return 5; } void stb_fput_varlen(FILE *f, int v) { stb_fput_varlenu(f, stb__varlen_xform(v)); } void stb_fput_varlenu(FILE *f, unsigned int z) { if (z >= 0x10000000) fputc(0xF0,f); if (z >= 0x00200000) fputc((z < 0x10000000 ? 0xE0 : 0)+(z>>24),f); if (z >= 0x00004000) fputc((z < 0x00200000 ? 0xC0 : 0)+(z>>16),f); if (z >= 0x00000080) fputc((z < 0x00004000 ? 0x80 : 0)+(z>> 8),f); fputc(z,f); } #define stb_fgetc(f) ((unsigned char) fgetc(f)) int stb_fget_varlen(FILE *f) { unsigned int z = stb_fget_varlenu(f); return (z & 1) ? ~(z>>1) : (z>>1); } unsigned int stb_fget_varlenu(FILE *f) { unsigned int z; unsigned char d; d = stb_fgetc(f); if (d >= 0x80) { if (d >= 0xc0) { if (d >= 0xe0) { if (d == 0xf0) z = stb_fgetc(f) << 24; else z = (d - 0xe0) << 24; z += stb_fgetc(f) << 16; } else z = (d - 0xc0) << 16; z += stb_fgetc(f) << 8; } else z = (d - 0x80) << 8; z += stb_fgetc(f); } else z = d; return z; } stb_uint64 stb_fget_varlen64(FILE *f) { stb_uint64 z; unsigned char d; d = stb_fgetc(f); if (d >= 0x80) { if (d >= 0xc0) { if (d >= 0xe0) { if (d >= 0xf0) { if (d >= 0xf8) { if (d >= 0xfc) { if (d >= 0xfe) { if (d >= 0xff) z = (stb_uint64) stb_fgetc(f) << 56; else z = (stb_uint64) (d - 0xfe) << 56; z |= (stb_uint64) stb_fgetc(f) << 48; } else z = (stb_uint64) (d - 0xfc) << 48; z |= (stb_uint64) stb_fgetc(f) << 40; } else z = (stb_uint64) (d - 0xf8) << 40; z |= (stb_uint64) stb_fgetc(f) << 32; } else z = (stb_uint64) (d - 0xf0) << 32; z |= (stb_uint) stb_fgetc(f) << 24; } else z = (stb_uint) (d - 0xe0) << 24; z |= (stb_uint) stb_fgetc(f) << 16; } else z = (stb_uint) (d - 0xc0) << 16; z |= (stb_uint) stb_fgetc(f) << 8; } else z = (stb_uint) (d - 0x80) << 8; z |= stb_fgetc(f); } else z = d; return (z & 1) ? ~(z >> 1) : (z >> 1); } int stb_size_varlen64(stb_uint64 v) { if (v < 0x00000080) return 1; if (v < 0x00004000) return 2; if (v < 0x00200000) return 3; if (v < 0x10000000) return 4; if (v < STB_IMM_UINT64(0x0000000800000000)) return 5; if (v < STB_IMM_UINT64(0x0000040000000000)) return 6; if (v < STB_IMM_UINT64(0x0002000000000000)) return 7; if (v < STB_IMM_UINT64(0x0100000000000000)) return 8; return 9; } void stb_fput_varlen64(FILE *f, stb_uint64 v) { stb_uint64 z = stb__varlen_xform(v); int first=1; if (z >= STB_IMM_UINT64(0x100000000000000)) { fputc(0xff,f); first=0; } if (z >= STB_IMM_UINT64(0x02000000000000)) fputc((first ? 0xFE : 0)+(char)(z>>56),f), first=0; if (z >= STB_IMM_UINT64(0x00040000000000)) fputc((first ? 0xFC : 0)+(char)(z>>48),f), first=0; if (z >= STB_IMM_UINT64(0x00000800000000)) fputc((first ? 0xF8 : 0)+(char)(z>>40),f), first=0; if (z >= STB_IMM_UINT64(0x00000010000000)) fputc((first ? 0xF0 : 0)+(char)(z>>32),f), first=0; if (z >= STB_IMM_UINT64(0x00000000200000)) fputc((first ? 0xE0 : 0)+(char)(z>>24),f), first=0; if (z >= STB_IMM_UINT64(0x00000000004000)) fputc((first ? 0xC0 : 0)+(char)(z>>16),f), first=0; if (z >= STB_IMM_UINT64(0x00000000000080)) fputc((first ? 0x80 : 0)+(char)(z>> 8),f), first=0; fputc((char)z,f); } void stb_fput_ranged(FILE *f, int v, int b, stb_uint n) { v -= b; if (n <= (1 << 31)) assert((stb_uint) v < n); if (n > (1 << 24)) fputc(v >> 24, f); if (n > (1 << 16)) fputc(v >> 16, f); if (n > (1 << 8)) fputc(v >> 8, f); fputc(v,f); } int stb_fget_ranged(FILE *f, int b, stb_uint n) { unsigned int v=0; if (n > (1 << 24)) v += stb_fgetc(f) << 24; if (n > (1 << 16)) v += stb_fgetc(f) << 16; if (n > (1 << 8)) v += stb_fgetc(f) << 8; v += stb_fgetc(f); return b+v; } int stb_size_ranged(int b, stb_uint n) { if (n > (1 << 24)) return 4; if (n > (1 << 16)) return 3; if (n > (1 << 8)) return 2; return 1; } void stb_fput_string(FILE *f, char *s) { int len = strlen(s); stb_fput_varlenu(f, len); fwrite(s, 1, len, f); } // inverse of the above algorithm char *stb_fget_string(FILE *f, void *p) { char *s; int len = stb_fget_varlenu(f); if (len > 4096) return NULL; s = p ? stb_malloc_string(p, len+1) : (char *) malloc(len+1); fread(s, 1, len, f); s[len] = 0; return s; } char *stb_strdup(char *str, void *pool) { int len = strlen(str); char *p = stb_malloc_string(pool, len+1); strcpy(p, str); return p; } // strip the trailing '/' or '\\' from a directory so we can refer to it // as a file for _stat() char *stb_strip_final_slash(char *t) { if (t[0]) { char *z = t + strlen(t) - 1; // *z is the last character if (*z == '\\' || *z == '/') if (z != t+2 || t[1] != ':') // but don't strip it if it's e.g. "c:/" *z = 0; if (*z == '\\') *z = '/'; // canonicalize to make sure it matches db } return t; } char *stb_strip_final_slash_regardless(char *t) { if (t[0]) { char *z = t + strlen(t) - 1; // *z is the last character if (*z == '\\' || *z == '/') *z = 0; if (*z == '\\') *z = '/'; // canonicalize to make sure it matches db } return t; } #endif ////////////////////////////////////////////////////////////////////////////// // // Options parsing // STB_EXTERN char **stb_getopt_param(int *argc, char **argv, char *param); STB_EXTERN char **stb_getopt(int *argc, char **argv); STB_EXTERN void stb_getopt_free(char **opts); #ifdef STB_DEFINE void stb_getopt_free(char **opts) { int i; char ** o2 = opts; for (i=0; i < stb_arr_len(o2); ++i) free(o2[i]); stb_arr_free(o2); } char **stb_getopt(int *argc, char **argv) { return stb_getopt_param(argc, argv, ""); } char **stb_getopt_param(int *argc, char **argv, char *param) { char ** opts=NULL; int i,j=1; for (i=1; i < *argc; ++i) { if (argv[i][0] != '-') { argv[j++] = argv[i]; } else { if (argv[i][1] == 0) { // plain - == don't parse further options ++i; while (i < *argc) argv[j++] = argv[i++]; break; } else { int k; char *q = argv[i]; // traverse options list for (k=1; q[k]; ++k) { char *s; if (strchr(param, q[k])) { // does it take a parameter? char *t = &q[k+1], z = q[k]; int len=0; if (*t == 0) { if (i == *argc-1) { // takes a parameter, but none found *argc = 0; stb_getopt_free(opts); return NULL; } t = argv[++i]; } else k += strlen(t); len = strlen(t); s = (char *) malloc(len+2); if (!s) return NULL; s[0] = z; strcpy(s+1, t); } else { // no parameter s = (char *) malloc(2); if (!s) return NULL; s[0] = q[k]; s[1] = 0; } stb_arr_push(opts, s); } } } } stb_arr_push(opts, NULL); *argc = j; return opts; } #endif ////////////////////////////////////////////////////////////////////////////// // // Portable directory reading // STB_EXTERN char **stb_readdir_files (char *dir); STB_EXTERN char **stb_readdir_files_mask(char *dir, char *wild); STB_EXTERN char **stb_readdir_subdirs(char *dir); STB_EXTERN char **stb_readdir_subdirs_mask(char *dir, char *wild); STB_EXTERN void stb_readdir_free (char **files); STB_EXTERN char **stb_readdir_recursive(char *dir, char *filespec); STB_EXTERN void stb_delete_directory_recursive(char *dir); #ifdef STB_DEFINE #ifdef _MSC_VER #include #else #include #include #endif void stb_readdir_free(char **files) { char **f2 = files; int i; for (i=0; i < stb_arr_len(f2); ++i) free(f2[i]); stb_arr_free(f2); } static int isdotdirname(char *name) { if (name[0] == '.') return (name[1] == '.') ? !name[2] : !name[1]; return 0; } STB_EXTERN int stb_wildmatchi(char *expr, char *candidate); static char **readdir_raw(char *dir, int return_subdirs, char *mask) { char **results = NULL; char buffer[4096], with_slash[4096]; size_t n; #ifdef _MSC_VER stb__wchar *ws; struct _wfinddata_t data; #ifdef _WIN64 const intptr_t none = -1; intptr_t z; #else const long none = -1; long z; #endif #else // !_MSC_VER const DIR *none = NULL; DIR *z; #endif n = stb_strscpy(buffer,dir,sizeof(buffer)); if (!n || n >= sizeof(buffer)) return NULL; stb_fixpath(buffer); n--; if (n > 0 && (buffer[n-1] != '/')) { buffer[n++] = '/'; } buffer[n] = 0; if (!stb_strscpy(with_slash,buffer,sizeof(with_slash))) return NULL; #ifdef _MSC_VER if (!stb_strscpy(buffer+n,"*.*",sizeof(buffer)-n)) return NULL; ws = stb__from_utf8(buffer); z = _wfindfirst((const wchar_t *)ws, &data); #else z = opendir(dir); #endif if (z != none) { int nonempty = STB_TRUE; #ifndef _MSC_VER struct dirent *data = readdir(z); nonempty = (data != NULL); #endif if (nonempty) { do { int is_subdir; #ifdef _MSC_VER char *name = stb__to_utf8((stb__wchar *)data.name); if (name == NULL) { fprintf(stderr, "%s to convert '%S' to %s!\n", "Unable", data.name, "utf8"); continue; } is_subdir = !!(data.attrib & _A_SUBDIR); #else char *name = data->d_name; if (!stb_strscpy(buffer+n,name,sizeof(buffer)-n)) break; // Could follow DT_LNK, but would need to check for recursive links. is_subdir = !!(data->d_type & DT_DIR); #endif if (is_subdir == return_subdirs) { if (!is_subdir || !isdotdirname(name)) { if (!mask || stb_wildmatchi(mask, name)) { char buffer[4096],*p=buffer; if ( stb_snprintf(buffer, sizeof(buffer), "%s%s", with_slash, name) < 0 ) break; if (buffer[0] == '.' && buffer[1] == '/') p = buffer+2; stb_arr_push(results, strdup(p)); } } } } #ifdef _MSC_VER while (0 == _wfindnext(z, &data)); #else while ((data = readdir(z)) != NULL); #endif } #ifdef _MSC_VER _findclose(z); #else closedir(z); #endif } return results; } char **stb_readdir_files (char *dir) { return readdir_raw(dir, 0, NULL); } char **stb_readdir_subdirs(char *dir) { return readdir_raw(dir, 1, NULL); } char **stb_readdir_files_mask(char *dir, char *wild) { return readdir_raw(dir, 0, wild); } char **stb_readdir_subdirs_mask(char *dir, char *wild) { return readdir_raw(dir, 1, wild); } int stb__rec_max=0x7fffffff; static char **stb_readdir_rec(char **sofar, char *dir, char *filespec) { char **files; char ** dirs; char **p; if (stb_arr_len(sofar) >= stb__rec_max) return sofar; files = stb_readdir_files_mask(dir, filespec); stb_arr_for(p, files) { stb_arr_push(sofar, strdup(*p)); if (stb_arr_len(sofar) >= stb__rec_max) break; } stb_readdir_free(files); if (stb_arr_len(sofar) >= stb__rec_max) return sofar; dirs = stb_readdir_subdirs(dir); stb_arr_for(p, dirs) sofar = stb_readdir_rec(sofar, *p, filespec); stb_readdir_free(dirs); return sofar; } char **stb_readdir_recursive(char *dir, char *filespec) { return stb_readdir_rec(NULL, dir, filespec); } void stb_delete_directory_recursive(char *dir) { char **list = stb_readdir_subdirs(dir); int i; for (i=0; i < stb_arr_len(list); ++i) stb_delete_directory_recursive(list[i]); stb_arr_free(list); list = stb_readdir_files(dir); for (i=0; i < stb_arr_len(list); ++i) if (!remove(list[i])) { // on windows, try again after making it writeable; don't ALWAYS // do this first since that would be slow in the normal case #ifdef _MSC_VER _chmod(list[i], _S_IWRITE); remove(list[i]); #endif } stb_arr_free(list); stb__windows(_rmdir,rmdir)(dir); } #endif ////////////////////////////////////////////////////////////////////////////// // // construct trees from filenames; useful for cmirror summaries typedef struct stb_dirtree2 stb_dirtree2; struct stb_dirtree2 { stb_dirtree2 **subdirs; // make convenient for stb_summarize_tree int num_subdir; float weight; // actual data char *fullpath; char *relpath; char **files; }; STB_EXTERN stb_dirtree2 *stb_dirtree2_from_files_relative(char *src, char **filelist, int count); STB_EXTERN stb_dirtree2 *stb_dirtree2_from_files(char **filelist, int count); STB_EXTERN int stb_dir_is_prefix(char *dir, int dirlen, char *file); #ifdef STB_DEFINE int stb_dir_is_prefix(char *dir, int dirlen, char *file) { if (dirlen == 0) return STB_TRUE; if (stb_strnicmp(dir, file, dirlen)) return STB_FALSE; if (file[dirlen] == '/' || file[dirlen] == '\\') return STB_TRUE; return STB_FALSE; } stb_dirtree2 *stb_dirtree2_from_files_relative(char *src, char **filelist, int count) { char buffer1[1024]; int i; int dlen = strlen(src), elen; stb_dirtree2 *d; char ** descendents = NULL; char ** files = NULL; char *s; if (!count) return NULL; // first find all the ones that belong here... note this is will take O(NM) with N files and M subdirs for (i=0; i < count; ++i) { if (stb_dir_is_prefix(src, dlen, filelist[i])) { stb_arr_push(descendents, filelist[i]); } } if (descendents == NULL) return NULL; elen = dlen; // skip a leading slash if (elen == 0 && (descendents[0][0] == '/' || descendents[0][0] == '\\')) ++elen; else if (elen) ++elen; // now extract all the ones that have their root here for (i=0; i < stb_arr_len(descendents);) { if (!stb_strchr2(descendents[i]+elen, '/', '\\')) { stb_arr_push(files, descendents[i]); descendents[i] = descendents[stb_arr_len(descendents)-1]; stb_arr_pop(descendents); } else ++i; } // now create a record d = (stb_dirtree2 *) malloc(sizeof(*d)); d->files = files; d->subdirs = NULL; d->fullpath = strdup(src); s = stb_strrchr2(d->fullpath, '/', '\\'); if (s) ++s; else s = d->fullpath; d->relpath = s; // now create the children qsort(descendents, stb_arr_len(descendents), sizeof(char *), stb_qsort_stricmp(0)); buffer1[0] = 0; for (i=0; i < stb_arr_len(descendents); ++i) { char buffer2[1024]; char *s = descendents[i] + elen, *t; t = stb_strchr2(s, '/', '\\'); assert(t); stb_strncpy(buffer2, descendents[i], t-descendents[i]+1); if (stb_stricmp(buffer1, buffer2)) { stb_dirtree2 *t = stb_dirtree2_from_files_relative(buffer2, descendents, stb_arr_len(descendents)); assert(t != NULL); strcpy(buffer1, buffer2); stb_arr_push(d->subdirs, t); } } d->num_subdir = stb_arr_len(d->subdirs); d->weight = 0; return d; } stb_dirtree2 *stb_dirtree2_from_files(char **filelist, int count) { return stb_dirtree2_from_files_relative("", filelist, count); } #endif ////////////////////////////////////////////////////////////////////////////// // // Checksums: CRC-32, ADLER32, SHA-1 // // CRC-32 and ADLER32 allow streaming blocks // SHA-1 requires either a complete buffer, max size 2^32 - 73 // or it can checksum directly from a file, max 2^61 #define STB_ADLER32_SEED 1 #define STB_CRC32_SEED 0 // note that we logical NOT this in the code STB_EXTERN stb_uint stb_adler32(stb_uint adler32, stb_uchar *buffer, stb_uint buflen); STB_EXTERN stb_uint stb_crc32_block(stb_uint crc32, stb_uchar *buffer, stb_uint len); STB_EXTERN stb_uint stb_crc32(unsigned char *buffer, stb_uint len); STB_EXTERN void stb_sha1( unsigned char output[20], unsigned char *buffer, unsigned int len); STB_EXTERN int stb_sha1_file(unsigned char output[20], char *file); STB_EXTERN void stb_sha1_readable(char display[27], unsigned char sha[20]); #ifdef STB_DEFINE stb_uint stb_crc32_block(stb_uint crc, unsigned char *buffer, stb_uint len) { static stb_uint crc_table[256]; stb_uint i,j,s; crc = ~crc; if (crc_table[1] == 0) for(i=0; i < 256; i++) { for (s=i, j=0; j < 8; ++j) s = (s >> 1) ^ (s & 1 ? 0xedb88320 : 0); crc_table[i] = s; } for (i=0; i < len; ++i) crc = (crc >> 8) ^ crc_table[buffer[i] ^ (crc & 0xff)]; return ~crc; } stb_uint stb_crc32(unsigned char *buffer, stb_uint len) { return stb_crc32_block(0, buffer, len); } stb_uint stb_adler32(stb_uint adler32, stb_uchar *buffer, stb_uint buflen) { const unsigned long ADLER_MOD = 65521; unsigned long s1 = adler32 & 0xffff, s2 = adler32 >> 16; unsigned long blocklen, i; blocklen = buflen % 5552; while (buflen) { for (i=0; i + 7 < blocklen; i += 8) { s1 += buffer[0], s2 += s1; s1 += buffer[1], s2 += s1; s1 += buffer[2], s2 += s1; s1 += buffer[3], s2 += s1; s1 += buffer[4], s2 += s1; s1 += buffer[5], s2 += s1; s1 += buffer[6], s2 += s1; s1 += buffer[7], s2 += s1; buffer += 8; } for (; i < blocklen; ++i) s1 += *buffer++, s2 += s1; s1 %= ADLER_MOD, s2 %= ADLER_MOD; buflen -= blocklen; blocklen = 5552; } return (s2 << 16) + s1; } static void stb__sha1(stb_uchar *chunk, stb_uint h[5]) { int i; stb_uint a,b,c,d,e; stb_uint w[80]; for (i=0; i < 16; ++i) w[i] = stb_big32(&chunk[i*4]); for (i=16; i < 80; ++i) { stb_uint t; t = w[i-3] ^ w[i-8] ^ w[i-14] ^ w[i-16]; w[i] = (t + t) | (t >> 31); } a = h[0]; b = h[1]; c = h[2]; d = h[3]; e = h[4]; #define STB__SHA1(k,f) \ { \ stb_uint temp = (a << 5) + (a >> 27) + (f) + e + (k) + w[i]; \ e = d; \ d = c; \ c = (b << 30) + (b >> 2); \ b = a; \ a = temp; \ } i=0; for (; i < 20; ++i) STB__SHA1(0x5a827999, d ^ (b & (c ^ d)) ); for (; i < 40; ++i) STB__SHA1(0x6ed9eba1, b ^ c ^ d ); for (; i < 60; ++i) STB__SHA1(0x8f1bbcdc, (b & c) + (d & (b ^ c)) ); for (; i < 80; ++i) STB__SHA1(0xca62c1d6, b ^ c ^ d ); #undef STB__SHA1 h[0] += a; h[1] += b; h[2] += c; h[3] += d; h[4] += e; } void stb_sha1(stb_uchar output[20], stb_uchar *buffer, stb_uint len) { unsigned char final_block[128]; stb_uint end_start, final_len, j; int i; stb_uint h[5]; h[0] = 0x67452301; h[1] = 0xefcdab89; h[2] = 0x98badcfe; h[3] = 0x10325476; h[4] = 0xc3d2e1f0; // we need to write padding to the last one or two // blocks, so build those first into 'final_block' // we have to write one special byte, plus the 8-byte length // compute the block where the data runs out end_start = len & ~63; // compute the earliest we can encode the length if (((len+9) & ~63) == end_start) { // it all fits in one block, so fill a second-to-last block end_start -= 64; } final_len = end_start + 128; // now we need to copy the data in assert(end_start + 128 >= len+9); assert(end_start < len || len < 64-9); j = 0; if (end_start > len) j = (stb_uint) - (int) end_start; for (; end_start + j < len; ++j) final_block[j] = buffer[end_start + j]; final_block[j++] = 0x80; while (j < 128-5) // 5 byte length, so write 4 extra padding bytes final_block[j++] = 0; // big-endian size final_block[j++] = len >> 29; final_block[j++] = len >> 21; final_block[j++] = len >> 13; final_block[j++] = len >> 5; final_block[j++] = len << 3; assert(j == 128 && end_start + j == final_len); for (j=0; j < final_len; j += 64) { // 512-bit chunks if (j+64 >= end_start+64) stb__sha1(&final_block[j - end_start], h); else stb__sha1(&buffer[j], h); } for (i=0; i < 5; ++i) { output[i*4 + 0] = h[i] >> 24; output[i*4 + 1] = h[i] >> 16; output[i*4 + 2] = h[i] >> 8; output[i*4 + 3] = h[i] >> 0; } } #ifdef _MSC_VER int stb_sha1_file(stb_uchar output[20], char *file) { int i; stb_uint64 length=0; unsigned char buffer[128]; FILE *f = stb__fopen(file, "rb"); stb_uint h[5]; if (f == NULL) return 0; // file not found h[0] = 0x67452301; h[1] = 0xefcdab89; h[2] = 0x98badcfe; h[3] = 0x10325476; h[4] = 0xc3d2e1f0; for(;;) { int n = fread(buffer, 1, 64, f); if (n == 64) { stb__sha1(buffer, h); length += n; } else { int block = 64; length += n; buffer[n++] = 0x80; // if there isn't enough room for the length, double the block if (n + 8 > 64) block = 128; // pad to end memset(buffer+n, 0, block-8-n); i = block - 8; buffer[i++] = (stb_uchar) (length >> 53); buffer[i++] = (stb_uchar) (length >> 45); buffer[i++] = (stb_uchar) (length >> 37); buffer[i++] = (stb_uchar) (length >> 29); buffer[i++] = (stb_uchar) (length >> 21); buffer[i++] = (stb_uchar) (length >> 13); buffer[i++] = (stb_uchar) (length >> 5); buffer[i++] = (stb_uchar) (length << 3); assert(i == block); stb__sha1(buffer, h); if (block == 128) stb__sha1(buffer+64, h); else assert(block == 64); break; } } fclose(f); for (i=0; i < 5; ++i) { output[i*4 + 0] = h[i] >> 24; output[i*4 + 1] = h[i] >> 16; output[i*4 + 2] = h[i] >> 8; output[i*4 + 3] = h[i] >> 0; } return 1; } #endif // _MSC_VER // client can truncate this wherever they like void stb_sha1_readable(char display[27], unsigned char sha[20]) { char encoding[65] = "0123456789abcdefghijklmnopqrstuv" "wxyzABCDEFGHIJKLMNOPQRSTUVWXYZ%$"; int num_bits = 0, acc=0; int i=0,o=0; while (o < 26) { int v; // expand the accumulator if (num_bits < 6) { assert(i != 20); acc += sha[i++] << num_bits; num_bits += 8; } v = acc & ((1 << 6) - 1); display[o++] = encoding[v]; acc >>= 6; num_bits -= 6; } assert(num_bits == 20*8 - 26*6); display[o++] = encoding[acc]; } #endif // STB_DEFINE /////////////////////////////////////////////////////////// // // simplified WINDOWS registry interface... hopefully // we'll never actually use this? #if defined(_WIN32) STB_EXTERN void * stb_reg_open(char *mode, char *where); // mode: "rHKLM" or "rHKCU" or "w.." STB_EXTERN void stb_reg_close(void *reg); STB_EXTERN int stb_reg_read(void *zreg, char *str, void *data, unsigned long len); STB_EXTERN int stb_reg_read_string(void *zreg, char *str, char *data, int len); STB_EXTERN void stb_reg_write(void *zreg, char *str, void *data, unsigned long len); STB_EXTERN void stb_reg_write_string(void *zreg, char *str, char *data); #if defined(STB_DEFINE) && !defined(STB_NO_REGISTRY) #define STB_HAS_REGISTRY #ifndef _WINDOWS_ #define HKEY void * STB_EXTERN __declspec(dllimport) long __stdcall RegCloseKey ( HKEY hKey ); STB_EXTERN __declspec(dllimport) long __stdcall RegCreateKeyExA ( HKEY hKey, const char * lpSubKey, int Reserved, char * lpClass, int dwOptions, int samDesired, void *lpSecurityAttributes, HKEY * phkResult, int * lpdwDisposition ); STB_EXTERN __declspec(dllimport) long __stdcall RegDeleteKeyA ( HKEY hKey, const char * lpSubKey ); STB_EXTERN __declspec(dllimport) long __stdcall RegQueryValueExA ( HKEY hKey, const char * lpValueName, int * lpReserved, unsigned long * lpType, unsigned char * lpData, unsigned long * lpcbData ); STB_EXTERN __declspec(dllimport) long __stdcall RegSetValueExA ( HKEY hKey, const char * lpValueName, int Reserved, int dwType, const unsigned char* lpData, int cbData ); STB_EXTERN __declspec(dllimport) long __stdcall RegOpenKeyExA ( HKEY hKey, const char * lpSubKey, int ulOptions, int samDesired, HKEY * phkResult ); #endif // _WINDOWS_ #define STB__REG_OPTION_NON_VOLATILE 0 #define STB__REG_KEY_ALL_ACCESS 0x000f003f #define STB__REG_KEY_READ 0x00020019 void *stb_reg_open(char *mode, char *where) { long res; HKEY base; HKEY zreg; if (!stb_stricmp(mode+1, "cu") || !stb_stricmp(mode+1, "hkcu")) base = (HKEY) 0x80000001; // HKCU else if (!stb_stricmp(mode+1, "lm") || !stb_stricmp(mode+1, "hklm")) base = (HKEY) 0x80000002; // HKLM else return NULL; if (mode[0] == 'r') res = RegOpenKeyExA(base, where, 0, STB__REG_KEY_READ, &zreg); else if (mode[0] == 'w') res = RegCreateKeyExA(base, where, 0, NULL, STB__REG_OPTION_NON_VOLATILE, STB__REG_KEY_ALL_ACCESS, NULL, &zreg, NULL); else return NULL; return res ? NULL : zreg; } void stb_reg_close(void *reg) { RegCloseKey((HKEY) reg); } #define STB__REG_SZ 1 #define STB__REG_BINARY 3 #define STB__REG_DWORD 4 int stb_reg_read(void *zreg, char *str, void *data, unsigned long len) { unsigned long type; unsigned long alen = len; if (0 == RegQueryValueExA((HKEY) zreg, str, 0, &type, (unsigned char *) data, &len)) if (type == STB__REG_BINARY || type == STB__REG_SZ || type == STB__REG_DWORD) { if (len < alen) *((char *) data + len) = 0; return 1; } return 0; } void stb_reg_write(void *zreg, char *str, void *data, unsigned long len) { if (zreg) RegSetValueExA((HKEY) zreg, str, 0, STB__REG_BINARY, (const unsigned char *) data, len); } int stb_reg_read_string(void *zreg, char *str, char *data, int len) { if (!stb_reg_read(zreg, str, data, len)) return 0; data[len-1] = 0; // force a 0 at the end of the string no matter what return 1; } void stb_reg_write_string(void *zreg, char *str, char *data) { if (zreg) RegSetValueExA((HKEY) zreg, str, 0, STB__REG_SZ, (const unsigned char *) data, strlen(data)+1); } #endif // STB_DEFINE #endif // _WIN32 ////////////////////////////////////////////////////////////////////////////// // // stb_cfg - This is like the registry, but the config info // is all stored in plain old files where we can // backup and restore them easily. The LOCATION of // the config files is gotten from... the registry! #ifndef STB_NO_STB_STRINGS typedef struct stb_cfg_st stb_cfg; STB_EXTERN stb_cfg * stb_cfg_open(char *config, char *mode); // mode = "r", "w" STB_EXTERN void stb_cfg_close(stb_cfg *cfg); STB_EXTERN int stb_cfg_read(stb_cfg *cfg, char *key, void *value, int len); STB_EXTERN void stb_cfg_write(stb_cfg *cfg, char *key, void *value, int len); STB_EXTERN int stb_cfg_read_string(stb_cfg *cfg, char *key, char *value, int len); STB_EXTERN void stb_cfg_write_string(stb_cfg *cfg, char *key, char *value); STB_EXTERN int stb_cfg_delete(stb_cfg *cfg, char *key); STB_EXTERN void stb_cfg_set_directory(char *dir); #ifdef STB_DEFINE typedef struct { char *key; void *value; int value_len; } stb__cfg_item; struct stb_cfg_st { stb__cfg_item *data; char *loaded_file; // this needs to be freed FILE *f; // write the data to this file on close }; static char *stb__cfg_sig = "sTbCoNfIg!\0\0"; static char stb__cfg_dir[512]; STB_EXTERN void stb_cfg_set_directory(char *dir) { strcpy(stb__cfg_dir, dir); } STB_EXTERN stb_cfg * stb_cfg_open(char *config, char *mode) { size_t len; stb_cfg *z; char file[512]; if (mode[0] != 'r' && mode[0] != 'w') return NULL; if (!stb__cfg_dir[0]) { #ifdef _WIN32 strcpy(stb__cfg_dir, "c:/stb"); #else strcpy(stb__cfg_dir, "~/.stbconfig"); #endif #ifdef STB_HAS_REGISTRY { void *reg = stb_reg_open("rHKLM", "Software\\SilverSpaceship\\stb"); if (reg) { stb_reg_read_string(reg, "config_dir", stb__cfg_dir, sizeof(stb__cfg_dir)); stb_reg_close(reg); } } #endif } sprintf(file, "%s/%s.cfg", stb__cfg_dir, config); z = (stb_cfg *) stb_malloc(0, sizeof(*z)); z->data = NULL; z->loaded_file = stb_filec(file, &len); if (z->loaded_file) { char *s = z->loaded_file; if (!memcmp(s, stb__cfg_sig, 12)) { char *s = z->loaded_file + 12; while (s < z->loaded_file + len) { stb__cfg_item a; int n = *(stb_int16 *) s; a.key = s+2; s = s+2 + n; a.value_len = *(int *) s; s += 4; a.value = s; s += a.value_len; stb_arr_push(z->data, a); } assert(s == z->loaded_file + len); } } if (mode[0] == 'w') z->f = fopen(file, "wb"); else z->f = NULL; return z; } void stb_cfg_close(stb_cfg *z) { if (z->f) { int i; // write the file out fwrite(stb__cfg_sig, 12, 1, z->f); for (i=0; i < stb_arr_len(z->data); ++i) { stb_int16 n = strlen(z->data[i].key)+1; fwrite(&n, 2, 1, z->f); fwrite(z->data[i].key, n, 1, z->f); fwrite(&z->data[i].value_len, 4, 1, z->f); fwrite(z->data[i].value, z->data[i].value_len, 1, z->f); } fclose(z->f); } stb_arr_free(z->data); stb_free(z); } int stb_cfg_read(stb_cfg *z, char *key, void *value, int len) { int i; for (i=0; i < stb_arr_len(z->data); ++i) { if (!stb_stricmp(z->data[i].key, key)) { int n = stb_min(len, z->data[i].value_len); memcpy(value, z->data[i].value, n); if (n < len) *((char *) value + n) = 0; return 1; } } return 0; } void stb_cfg_write(stb_cfg *z, char *key, void *value, int len) { int i; for (i=0; i < stb_arr_len(z->data); ++i) if (!stb_stricmp(z->data[i].key, key)) break; if (i == stb_arr_len(z->data)) { stb__cfg_item p; p.key = stb_strdup(key, z); p.value = NULL; p.value_len = 0; stb_arr_push(z->data, p); } z->data[i].value = stb_malloc(z, len); z->data[i].value_len = len; memcpy(z->data[i].value, value, len); } int stb_cfg_delete(stb_cfg *z, char *key) { int i; for (i=0; i < stb_arr_len(z->data); ++i) if (!stb_stricmp(z->data[i].key, key)) { stb_arr_fastdelete(z->data, i); return 1; } return 0; } int stb_cfg_read_string(stb_cfg *z, char *key, char *value, int len) { if (!stb_cfg_read(z, key, value, len)) return 0; value[len-1] = 0; return 1; } void stb_cfg_write_string(stb_cfg *z, char *key, char *value) { stb_cfg_write(z, key, value, strlen(value)+1); } #endif ////////////////////////////////////////////////////////////////////////////// // // stb_dirtree - load a description of a directory tree // uses a cache and stat()s the directories for changes // MUCH faster on NTFS, _wrong_ on FAT32, so should // ignore the db on FAT32 #ifdef _WIN32 typedef struct { char * path; // full path from passed-in root time_t last_modified; int num_files; int flag; } stb_dirtree_dir; typedef struct { char *name; // name relative to path int dir; // index into dirs[] array stb_int64 size; // size, max 4GB time_t last_modified; int flag; } stb_dirtree_file; typedef struct { stb_dirtree_dir *dirs; stb_dirtree_file *files; // internal use void * string_pool; // used to free data en masse } stb_dirtree; extern void stb_dirtree_free ( stb_dirtree *d ); extern stb_dirtree *stb_dirtree_get ( char *dir); extern stb_dirtree *stb_dirtree_get_dir ( char *dir, char *cache_dir); extern stb_dirtree *stb_dirtree_get_with_file ( char *dir, char *cache_file); // get a list of all the files recursively underneath 'dir' // // cache_file is used to store a copy of the directory tree to speed up // later calls. It must be unique to 'dir' and the current working // directory! Otherwise who knows what will happen (a good solution // is to put it _in_ dir, but this API doesn't force that). // // Also, it might be possible to break this if you have two different processes // do a call to stb_dirtree_get() with the same cache file at about the same // time, but I _think_ it might just work. // i needed to build an identical data structure representing the state of // a mirrored copy WITHOUT bothering to rescan it (i.e. we're mirroring to // it WITHOUT scanning it, e.g. it's over the net), so this requires access // to all of the innards. extern void stb_dirtree_db_add_dir(stb_dirtree *active, char *path, time_t last); extern void stb_dirtree_db_add_file(stb_dirtree *active, char *name, int dir, stb_int64 size, time_t last); extern void stb_dirtree_db_read(stb_dirtree *target, char *filename, char *dir); extern void stb_dirtree_db_write(stb_dirtree *target, char *filename, char *dir); #ifdef STB_DEFINE static void stb__dirtree_add_dir(char *path, time_t last, stb_dirtree *active) { stb_dirtree_dir d; d.last_modified = last; d.num_files = 0; d.path = stb_strdup(path, active->string_pool); stb_arr_push(active->dirs, d); } static void stb__dirtree_add_file(char *name, int dir, stb_int64 size, time_t last, stb_dirtree *active) { stb_dirtree_file f; f.dir = dir; f.size = size; f.last_modified = last; f.name = stb_strdup(name, active->string_pool); ++active->dirs[dir].num_files; stb_arr_push(active->files, f); } // version 02 supports > 4GB files static char stb__signature[12] = { 's', 'T', 'b', 'D', 'i', 'R', 't', 'R', 'e', 'E', '0', '2' }; static void stb__dirtree_save_db(char *filename, stb_dirtree *data, char *root) { int i, num_dirs_final=0, num_files_final; char *info = root ? root : ""; int *remap; FILE *f = fopen(filename, "wb"); if (!f) return; fwrite(stb__signature, sizeof(stb__signature), 1, f); fwrite(info, strlen(info)+1, 1, f); // need to be slightly tricky and not write out NULLed directories, nor the root // build remapping table of all dirs we'll be writing out remap = (int *) malloc(sizeof(remap[0]) * stb_arr_len(data->dirs)); for (i=0; i < stb_arr_len(data->dirs); ++i) { if (data->dirs[i].path == NULL || (root && 0==stb_stricmp(data->dirs[i].path, root))) { remap[i] = -1; } else { remap[i] = num_dirs_final++; } } fwrite(&num_dirs_final, 4, 1, f); for (i=0; i < stb_arr_len(data->dirs); ++i) { if (remap[i] >= 0) { fwrite(&data->dirs[i].last_modified, 4, 1, f); stb_fput_string(f, data->dirs[i].path); } } num_files_final = 0; for (i=0; i < stb_arr_len(data->files); ++i) if (remap[data->files[i].dir] >= 0 && data->files[i].name) ++num_files_final; fwrite(&num_files_final, 4, 1, f); for (i=0; i < stb_arr_len(data->files); ++i) { if (remap[data->files[i].dir] >= 0 && data->files[i].name) { stb_fput_ranged(f, remap[data->files[i].dir], 0, num_dirs_final); stb_fput_varlen64(f, data->files[i].size); fwrite(&data->files[i].last_modified, 4, 1, f); stb_fput_string(f, data->files[i].name); } } fclose(f); } // note: stomps any existing data, rather than appending static void stb__dirtree_load_db(char *filename, stb_dirtree *data, char *dir) { char sig[2048]; int i,n; FILE *f = fopen(filename, "rb"); if (!f) return; data->string_pool = stb_malloc(0,1); fread(sig, sizeof(stb__signature), 1, f); if (memcmp(stb__signature, sig, sizeof(stb__signature))) { fclose(f); return; } if (!fread(sig, strlen(dir)+1, 1, f)) { fclose(f); return; } if (stb_stricmp(sig,dir)) { fclose(f); return; } // we can just read them straight in, because they're guaranteed to be valid fread(&n, 4, 1, f); stb_arr_setlen(data->dirs, n); for(i=0; i < stb_arr_len(data->dirs); ++i) { fread(&data->dirs[i].last_modified, 4, 1, f); data->dirs[i].path = stb_fget_string(f, data->string_pool); if (data->dirs[i].path == NULL) goto bail; } fread(&n, 4, 1, f); stb_arr_setlen(data->files, n); for (i=0; i < stb_arr_len(data->files); ++i) { data->files[i].dir = stb_fget_ranged(f, 0, stb_arr_len(data->dirs)); data->files[i].size = stb_fget_varlen64(f); fread(&data->files[i].last_modified, 4, 1, f); data->files[i].name = stb_fget_string(f, data->string_pool); if (data->files[i].name == NULL) goto bail; } if (0) { bail: stb_arr_free(data->dirs); stb_arr_free(data->files); } fclose(f); } static int stb__dircount, stb__dircount_mask, stb__showfile; static void stb__dirtree_scandir(char *path, time_t last_time, stb_dirtree *active) { // this is dumb depth first; theoretically it might be faster // to fully traverse each directory before visiting its children, // but it's complicated and didn't seem like a gain in the test app int n; struct _wfinddatai64_t c_file; long hFile; stb__wchar full_path[1024]; int has_slash; if (stb__showfile) printf("<"); has_slash = (path[0] && path[strlen(path)-1] == '/'); if (has_slash) swprintf(full_path, L"%s*", stb__from_utf8(path)); else swprintf(full_path, L"%s/*", stb__from_utf8(path)); // it's possible this directory is already present: that means it was in the // cache, but its parent wasn't... in that case, we're done with it if (stb__showfile) printf("C[%d]", stb_arr_len(active->dirs)); for (n=0; n < stb_arr_len(active->dirs); ++n) if (0 == stb_stricmp(active->dirs[n].path, path)) { if (stb__showfile) printf("D"); return; } if (stb__showfile) printf("E"); // otherwise, we need to add it stb__dirtree_add_dir(path, last_time, active); n = stb_arr_lastn(active->dirs); if (stb__showfile) printf("["); if( (hFile = _wfindfirsti64( full_path, &c_file )) != -1L ) { do { if (stb__showfile) printf(")"); if (c_file.attrib & _A_SUBDIR) { // ignore subdirectories starting with '.', e.g. "." and ".." if (c_file.name[0] != '.') { char *new_path = (char *) full_path; char *temp = stb__to_utf8(c_file.name); if (has_slash) sprintf(new_path, "%s%s", path, temp); else sprintf(new_path, "%s/%s", path, temp); if (stb__dircount_mask) { ++stb__dircount; if (!(stb__dircount & stb__dircount_mask)) { printf("%s\r", new_path); } } stb__dirtree_scandir(new_path, c_file.time_write, active); } } else { char *temp = stb__to_utf8(c_file.name); stb__dirtree_add_file(temp, n, c_file.size, c_file.time_write, active); } if (stb__showfile) printf("("); } while( _wfindnexti64( hFile, &c_file ) == 0 ); if (stb__showfile) printf("]"); _findclose( hFile ); } if (stb__showfile) printf(">\n"); } // scan the database and see if it's all valid static int stb__dirtree_update_db(stb_dirtree *db, stb_dirtree *active) { int changes_detected = STB_FALSE; int i; int *remap; int *rescan=NULL; remap = (int *) malloc(sizeof(remap[0]) * stb_arr_len(db->dirs)); memset(remap, 0, sizeof(remap[0]) * stb_arr_len(db->dirs)); rescan = NULL; for (i=0; i < stb_arr_len(db->dirs); ++i) { struct _stat info; if (stb__dircount_mask) { ++stb__dircount; if (!(stb__dircount & stb__dircount_mask)) { printf("."); } } if (0 == _stat(db->dirs[i].path, &info)) { if (info.st_mode & _S_IFDIR) { // it's still a directory, as expected int n = abs(info.st_mtime - db->dirs[i].last_modified); if (n > 1 && n != 3600) { // the 3600 is a hack because sometimes this jumps for no apparent reason, even when no time zone or DST issues are at play // it's changed! force a rescan // we don't want to scan it until we've stat()d its // subdirs, though, so we queue it if (stb__showfile) printf("Changed: %s - %08x:%08x\n", db->dirs[i].path, db->dirs[i].last_modified, info.st_mtime); stb_arr_push(rescan, i); // update the last_mod time db->dirs[i].last_modified = info.st_mtime; // ignore existing files in this dir remap[i] = -1; changes_detected = STB_TRUE; } else { // it hasn't changed, just copy it through unchanged stb__dirtree_add_dir(db->dirs[i].path, db->dirs[i].last_modified, active); remap[i] = stb_arr_lastn(active->dirs); } } else { // this path used to refer to a directory, but now it's a file! // assume that the parent directory is going to be forced to rescan anyway goto delete_entry; } } else { delete_entry: // directory no longer exists, so don't copy it // we don't free it because it's in the string pool now db->dirs[i].path = NULL; remap[i] = -1; changes_detected = STB_TRUE; } } // at this point, we have: // // holds a list of directory indices that need to be scanned due to being out of date // holds the directory index in for each dir in , if it exists; -1 if not // directories in are not in yet // so we can go ahead and remap all the known files right now for (i=0; i < stb_arr_len(db->files); ++i) { int dir = db->files[i].dir; if (remap[dir] >= 0) { stb__dirtree_add_file(db->files[i].name, remap[dir], db->files[i].size, db->files[i].last_modified, active); } } // at this point we're done with db->files, and done with remap free(remap); // now scan those directories using the standard scan for (i=0; i < stb_arr_len(rescan); ++i) { int z = rescan[i]; stb__dirtree_scandir(db->dirs[z].path, db->dirs[z].last_modified, active); } stb_arr_free(rescan); return changes_detected; } static void stb__dirtree_free_raw(stb_dirtree *d) { stb_free(d->string_pool); stb_arr_free(d->dirs); stb_arr_free(d->files); } stb_dirtree *stb_dirtree_get_with_file(char *dir, char *cache_file) { stb_dirtree *output = (stb_dirtree *) malloc(sizeof(*output)); stb_dirtree db,active; int prev_dir_count, cache_mismatch; char *stripped_dir; // store the directory name without a trailing '/' or '\\' // load the database of last-known state on disk db.string_pool = NULL; db.files = NULL; db.dirs = NULL; stripped_dir = stb_strip_final_slash(strdup(dir)); if (cache_file != NULL) stb__dirtree_load_db(cache_file, &db, stripped_dir); else if (stb__showfile) printf("No cache file\n"); active.files = NULL; active.dirs = NULL; active.string_pool = stb_malloc(0,1); // @TODO: share string pools between both? // check all the directories in the database; make note if // anything we scanned had changed, and rescan those things cache_mismatch = stb__dirtree_update_db(&db, &active); // check the root tree prev_dir_count = stb_arr_len(active.dirs); // record how many directories we've seen stb__dirtree_scandir(stripped_dir, 0, &active); // no last_modified time available for root if (stb__dircount_mask) printf(" \r"); // done with the DB; write it back out if any changes, i.e. either // 1. any inconsistency found between cached information and actual disk // or 2. if scanning the root found any new directories--which we detect because // more than one directory got added to the active db during that scan if (cache_mismatch || stb_arr_len(active.dirs) > prev_dir_count+1) stb__dirtree_save_db(cache_file, &active, stripped_dir); free(stripped_dir); stb__dirtree_free_raw(&db); *output = active; return output; } stb_dirtree *stb_dirtree_get_dir(char *dir, char *cache_dir) { int i; stb_uint8 sha[20]; char dir_lower[1024]; char cache_file[1024],*s; if (cache_dir == NULL) return stb_dirtree_get_with_file(dir, NULL); strcpy(dir_lower, dir); stb_tolower(dir_lower); stb_sha1(sha, (unsigned char *) dir_lower, strlen(dir_lower)); strcpy(cache_file, cache_dir); s = cache_file + strlen(cache_file); if (s[-1] != '//' && s[-1] != '\\') *s++ = '/'; strcpy(s, "dirtree_"); s += strlen(s); for (i=0; i < 8; ++i) { char *hex = "0123456789abcdef"; stb_uint z = sha[i]; *s++ = hex[z >> 4]; *s++ = hex[z & 15]; } strcpy(s, ".bin"); return stb_dirtree_get_with_file(dir, cache_file); } stb_dirtree *stb_dirtree_get(char *dir) { char cache_dir[256]; strcpy(cache_dir, "c:/stb"); #ifdef STB_HAS_REGISTRY { void *reg = stb_reg_open("rHKLM", "Software\\SilverSpaceship\\stb"); if (reg) { stb_reg_read(reg, "dirtree", cache_dir, sizeof(cache_dir)); stb_reg_close(reg); } } #endif return stb_dirtree_get_dir(dir, cache_dir); } void stb_dirtree_free(stb_dirtree *d) { stb__dirtree_free_raw(d); free(d); } void stb_dirtree_db_add_dir(stb_dirtree *active, char *path, time_t last) { stb__dirtree_add_dir(path, last, active); } void stb_dirtree_db_add_file(stb_dirtree *active, char *name, int dir, stb_int64 size, time_t last) { stb__dirtree_add_file(name, dir, size, last, active); } void stb_dirtree_db_read(stb_dirtree *target, char *filename, char *dir) { char *s = stb_strip_final_slash(strdup(dir)); target->dirs = 0; target->files = 0; target->string_pool = 0; stb__dirtree_load_db(filename, target, s); free(s); } void stb_dirtree_db_write(stb_dirtree *target, char *filename, char *dir) { stb__dirtree_save_db(filename, target, 0); // don't strip out any directories } #endif // STB_DEFINE #endif // _WIN32 #endif // STB_NO_STB_STRINGS ////////////////////////////////////////////////////////////////////////////// // // STB_MALLOC_WRAPPER // // you can use the wrapper functions with your own malloc wrapper, // or define STB_MALLOC_WRAPPER project-wide to have // malloc/free/realloc/strdup all get vectored to it // this has too many very specific error messages you could google for and find in stb.h, // so don't use it if they don't want any stb.h-identifiable strings #if defined(STB_DEFINE) && !defined(STB_NO_STB_STRINGS) typedef struct { void *p; char *file; int line; int size; } stb_malloc_record; #ifndef STB_MALLOC_HISTORY_COUNT #define STB_MALLOC_HISTORY_COUNT 50 // 800 bytes #endif stb_malloc_record *stb__allocations; static int stb__alloc_size, stb__alloc_limit, stb__alloc_mask; int stb__alloc_count; stb_malloc_record stb__alloc_history[STB_MALLOC_HISTORY_COUNT]; int stb__history_pos; static int stb__hashfind(void *p) { stb_uint32 h = stb_hashptr(p); int s,n = h & stb__alloc_mask; if (stb__allocations[n].p == p) return n; s = stb_rehash(h)|1; for(;;) { if (stb__allocations[n].p == NULL) return -1; n = (n+s) & stb__alloc_mask; if (stb__allocations[n].p == p) return n; } } int stb_wrapper_allocsize(void *p) { int n = stb__hashfind(p); if (n < 0) return 0; return stb__allocations[n].size; } static int stb__historyfind(void *p) { int n = stb__history_pos; int i; for (i=0; i < STB_MALLOC_HISTORY_COUNT; ++i) { if (--n < 0) n = STB_MALLOC_HISTORY_COUNT-1; if (stb__alloc_history[n].p == p) return n; } return -1; } static void stb__add_alloc(void *p, int sz, char *file, int line); static void stb__grow_alloc(void) { int i,old_num = stb__alloc_size; stb_malloc_record *old = stb__allocations; if (stb__alloc_size == 0) stb__alloc_size = 64; else stb__alloc_size *= 2; stb__allocations = (stb_malloc_record *) stb__realloc_raw(NULL, stb__alloc_size * sizeof(stb__allocations[0])); if (stb__allocations == NULL) stb_fatal("Internal error: couldn't grow malloc wrapper table"); memset(stb__allocations, 0, stb__alloc_size * sizeof(stb__allocations[0])); stb__alloc_limit = (stb__alloc_size*3)>>2; stb__alloc_mask = stb__alloc_size-1; stb__alloc_count = 0; for (i=0; i < old_num; ++i) if (old[i].p > STB_DEL) { stb__add_alloc(old[i].p, old[i].size, old[i].file, old[i].line); assert(stb__hashfind(old[i].p) >= 0); } for (i=0; i < old_num; ++i) if (old[i].p > STB_DEL) assert(stb__hashfind(old[i].p) >= 0); stb__realloc_raw(old, 0); } static void stb__add_alloc(void *p, int sz, char *file, int line) { stb_uint32 h; int n; if (stb__alloc_count >= stb__alloc_limit) stb__grow_alloc(); h = stb_hashptr(p); n = h & stb__alloc_mask; if (stb__allocations[n].p > STB_DEL) { int s = stb_rehash(h)|1; do { n = (n+s) & stb__alloc_mask; } while (stb__allocations[n].p > STB_DEL); } assert(stb__allocations[n].p == NULL || stb__allocations[n].p == STB_DEL); stb__allocations[n].p = p; stb__allocations[n].size = sz; stb__allocations[n].line = line; stb__allocations[n].file = file; ++stb__alloc_count; } static void stb__remove_alloc(int n, char *file, int line) { stb__alloc_history[stb__history_pos] = stb__allocations[n]; stb__alloc_history[stb__history_pos].file = file; stb__alloc_history[stb__history_pos].line = line; if (++stb__history_pos == STB_MALLOC_HISTORY_COUNT) stb__history_pos = 0; stb__allocations[n].p = STB_DEL; --stb__alloc_count; } void stb_wrapper_malloc(void *p, int sz, char *file, int line) { if (!p) return; stb__add_alloc(p,sz,file,line); } void stb_wrapper_free(void *p, char *file, int line) { int n; if (p == NULL) return; n = stb__hashfind(p); if (n >= 0) stb__remove_alloc(n, file, line); else { // tried to free something we hadn't allocated! n = stb__historyfind(p); assert(0); /* NOTREACHED */ if (n >= 0) stb_fatal("Attempted to free %d-byte block %p at %s:%d previously freed/realloced at %s:%d", stb__alloc_history[n].size, p, file, line, stb__alloc_history[n].file, stb__alloc_history[n].line); else stb_fatal("Attempted to free unknown block %p at %s:%d", p, file,line); } } void stb_wrapper_check(void *p) { int n; if (p == NULL) return; n = stb__hashfind(p); if (n >= 0) return; for (n=0; n < stb__alloc_size; ++n) if (stb__allocations[n].p == p) stb_fatal("Internal error: pointer %p was allocated, but hash search failed", p); // tried to free something that wasn't allocated! n = stb__historyfind(p); if (n >= 0) stb_fatal("Checked %d-byte block %p previously freed/realloced at %s:%d", stb__alloc_history[n].size, p, stb__alloc_history[n].file, stb__alloc_history[n].line); stb_fatal("Checked unknown block %p"); } void stb_wrapper_realloc(void *p, void *q, int sz, char *file, int line) { int n; if (p == NULL) { stb_wrapper_malloc(q, sz, file, line); return; } if (q == NULL) return; // nothing happened n = stb__hashfind(p); if (n == -1) { // tried to free something we hadn't allocated! // this is weird, though, because we got past the realloc! n = stb__historyfind(p); assert(0); /* NOTREACHED */ if (n >= 0) stb_fatal("Attempted to realloc %d-byte block %p at %s:%d previously freed/realloced at %s:%d", stb__alloc_history[n].size, p, file, line, stb__alloc_history[n].file, stb__alloc_history[n].line); else stb_fatal("Attempted to realloc unknown block %p at %s:%d", p, file,line); } else { if (q == p) { stb__allocations[n].size = sz; stb__allocations[n].file = file; stb__allocations[n].line = line; } else { stb__remove_alloc(n, file, line); stb__add_alloc(q,sz,file,line); } } } void stb_wrapper_listall(void (*func)(void *ptr, int sz, char *file, int line)) { int i; for (i=0; i < stb__alloc_size; ++i) if (stb__allocations[i].p > STB_DEL) func(stb__allocations[i].p , stb__allocations[i].size, stb__allocations[i].file, stb__allocations[i].line); } void stb_wrapper_dump(char *filename) { int i; FILE *f = fopen(filename, "w"); if (!f) return; for (i=0; i < stb__alloc_size; ++i) if (stb__allocations[i].p > STB_DEL) fprintf(f, "%p %7d - %4d %s\n", stb__allocations[i].p , stb__allocations[i].size, stb__allocations[i].line, stb__allocations[i].file); } #endif // STB_DEFINE ////////////////////////////////////////////////////////////////////////////// // // stb_pointer_set // // // For data structures that support querying by key, data structure // classes always hand-wave away the issue of what to do if two entries // have the same key: basically, store a linked list of all the nodes // which have the same key (a LISP-style list). // // The thing is, it's not that trivial. If you have an O(log n) // lookup data structure, but then n/4 items have the same value, // you don't want to spend O(n) time scanning that list when // deleting an item if you already have a pointer to the item. // (You have to spend O(n) time enumerating all the items with // a given key, sure, and you can't accelerate deleting a particular // item if you only have the key, not a pointer to the item.) // // I'm going to call this data structure, whatever it turns out to // be, a "pointer set", because we don't store any associated data for // items in this data structure, we just answer the question of // whether an item is in it or not (it's effectively one bit per pointer). // Technically they don't have to be pointers; you could cast ints // to (void *) if you want, but you can't store 0 or 1 because of the // hash table. // // Since the fastest data structure we might want to add support for // identical-keys to is a hash table with O(1)-ish lookup time, // that means that the conceptual "linked list of all items with // the same indexed value" that we build needs to have the same // performance; that way when we index a table we think is arbitrary // ints, but in fact half of them are 0, we don't get screwed. // // Therefore, it needs to be a hash table, at least when it gets // large. On the other hand, when the data has totally arbitrary ints // or floats, there won't be many collisions, and we'll have tons of // 1-item bitmaps. That will be grossly inefficient as hash tables; // trade-off; the hash table is reasonably efficient per-item when // it's large, but not when it's small. So we need to do something // Judy-like and use different strategies depending on the size. // // Like Judy, we'll use the bottom bit to encode the strategy: // // bottom bits: // 00 - direct pointer // 01 - 4-item bucket (16 bytes, no length, NULLs) // 10 - N-item array // 11 - hash table typedef struct stb_ps stb_ps; STB_EXTERN int stb_ps_find (stb_ps *ps, void *value); STB_EXTERN stb_ps * stb_ps_add (stb_ps *ps, void *value); STB_EXTERN stb_ps * stb_ps_remove(stb_ps *ps, void *value); STB_EXTERN stb_ps * stb_ps_remove_any(stb_ps *ps, void **value); STB_EXTERN void stb_ps_delete(stb_ps *ps); STB_EXTERN int stb_ps_count (stb_ps *ps); STB_EXTERN stb_ps * stb_ps_copy (stb_ps *ps); STB_EXTERN int stb_ps_subset(stb_ps *bigger, stb_ps *smaller); STB_EXTERN int stb_ps_eq (stb_ps *p0, stb_ps *p1); STB_EXTERN void ** stb_ps_getlist (stb_ps *ps, int *count); STB_EXTERN int stb_ps_writelist(stb_ps *ps, void **list, int size ); // enum and fastlist don't allocate storage, but you must consume the // list before there's any chance the data structure gets screwed up; STB_EXTERN int stb_ps_enum (stb_ps *ps, void *data, int (*func)(void *value, void*data) ); STB_EXTERN void ** stb_ps_fastlist(stb_ps *ps, int *count); // result: // returns a list, *count is the length of that list, // but some entries of the list may be invalid; // test with 'stb_ps_fastlist_valid(x)' #define stb_ps_fastlist_valid(x) ((stb_uinta) (x) > 1) #ifdef STB_DEFINE enum { STB_ps_direct = 0, STB_ps_bucket = 1, STB_ps_array = 2, STB_ps_hash = 3, }; #define STB_BUCKET_SIZE 4 typedef struct { void *p[STB_BUCKET_SIZE]; } stb_ps_bucket; #define GetBucket(p) ((stb_ps_bucket *) ((char *) (p) - STB_ps_bucket)) #define EncodeBucket(p) ((stb_ps *) ((char *) (p) + STB_ps_bucket)) static void stb_bucket_free(stb_ps_bucket *b) { free(b); } static stb_ps_bucket *stb_bucket_create2(void *v0, void *v1) { stb_ps_bucket *b = (stb_ps_bucket*) malloc(sizeof(*b)); b->p[0] = v0; b->p[1] = v1; b->p[2] = NULL; b->p[3] = NULL; return b; } static stb_ps_bucket * stb_bucket_create3(void **v) { stb_ps_bucket *b = (stb_ps_bucket*) malloc(sizeof(*b)); b->p[0] = v[0]; b->p[1] = v[1]; b->p[2] = v[2]; b->p[3] = NULL; return b; } // could use stb_arr, but this will save us memory typedef struct { int count; void *p[1]; } stb_ps_array; #define GetArray(p) ((stb_ps_array *) ((char *) (p) - STB_ps_array)) #define EncodeArray(p) ((stb_ps *) ((char *) (p) + STB_ps_array)) static int stb_ps_array_max = 13; typedef struct { int size, mask; int count, count_deletes; int grow_threshhold; int shrink_threshhold; int rehash_threshhold; int any_offset; void *table[1]; } stb_ps_hash; #define GetHash(p) ((stb_ps_hash *) ((char *) (p) - STB_ps_hash)) #define EncodeHash(p) ((stb_ps *) ((char *) (p) + STB_ps_hash)) #define stb_ps_empty(v) (((stb_uint32) v) <= 1) static stb_ps_hash *stb_ps_makehash(int size, int old_size, void **old_data) { int i; stb_ps_hash *h = (stb_ps_hash *) malloc(sizeof(*h) + (size-1) * sizeof(h->table[0])); assert(stb_is_pow2(size)); h->size = size; h->mask = size-1; h->shrink_threshhold = (int) (0.3f * size); h-> grow_threshhold = (int) (0.8f * size); h->rehash_threshhold = (int) (0.9f * size); h->count = 0; h->count_deletes = 0; h->any_offset = 0; memset(h->table, 0, size * sizeof(h->table[0])); for (i=0; i < old_size; ++i) if (!stb_ps_empty(old_data[i])) stb_ps_add(EncodeHash(h), old_data[i]); return h; } void stb_ps_delete(stb_ps *ps) { switch (3 & (int) ps) { case STB_ps_direct: break; case STB_ps_bucket: stb_bucket_free(GetBucket(ps)); break; case STB_ps_array : free(GetArray(ps)); break; case STB_ps_hash : free(GetHash(ps)); break; } } stb_ps *stb_ps_copy(stb_ps *ps) { int i; // not a switch: order based on expected performance/power-law distribution switch (3 & (int) ps) { case STB_ps_direct: return ps; case STB_ps_bucket: { stb_ps_bucket *n = (stb_ps_bucket *) malloc(sizeof(*n)); *n = *GetBucket(ps); return EncodeBucket(n); } case STB_ps_array: { stb_ps_array *a = GetArray(ps); stb_ps_array *n = (stb_ps_array *) malloc(sizeof(*n) + stb_ps_array_max * sizeof(n->p[0])); n->count = a->count; for (i=0; i < a->count; ++i) n->p[i] = a->p[i]; return EncodeArray(n); } case STB_ps_hash: { stb_ps_hash *h = GetHash(ps); stb_ps_hash *n = stb_ps_makehash(h->size, h->size, h->table); return EncodeHash(n); } } assert(0); /* NOTREACHED */ return NULL; } int stb_ps_find(stb_ps *ps, void *value) { int i, code = 3 & (int) ps; assert((3 & (int) value) == STB_ps_direct); assert(stb_ps_fastlist_valid(value)); // not a switch: order based on expected performance/power-law distribution if (code == STB_ps_direct) return value == ps; if (code == STB_ps_bucket) { stb_ps_bucket *b = GetBucket(ps); assert(STB_BUCKET_SIZE == 4); if (b->p[0] == value || b->p[1] == value || b->p[2] == value || b->p[3] == value) return STB_TRUE; return STB_FALSE; } if (code == STB_ps_array) { stb_ps_array *a = GetArray(ps); for (i=0; i < a->count; ++i) if (a->p[i] == value) return STB_TRUE; return STB_FALSE; } else { stb_ps_hash *h = GetHash(ps); stb_uint32 hash = stb_hashptr(value); stb_uint32 s, n = hash & h->mask; void **t = h->table; if (t[n] == value) return STB_TRUE; if (t[n] == NULL) return STB_FALSE; s = stb_rehash(hash) | 1; do { n = (n + s) & h->mask; if (t[n] == value) return STB_TRUE; } while (t[n] != NULL); return STB_FALSE; } } stb_ps * stb_ps_add (stb_ps *ps, void *value) { #ifdef STB_DEBUG assert(!stb_ps_find(ps,value)); #endif if (value == NULL) return ps; // ignore NULL adds to avoid bad breakage assert((3 & (int) value) == STB_ps_direct); assert(stb_ps_fastlist_valid(value)); assert(value != STB_DEL); // STB_DEL is less likely switch (3 & (int) ps) { case STB_ps_direct: if (ps == NULL) return (stb_ps *) value; return EncodeBucket(stb_bucket_create2(ps,value)); case STB_ps_bucket: { stb_ps_bucket *b = GetBucket(ps); stb_ps_array *a; assert(STB_BUCKET_SIZE == 4); if (b->p[0] == NULL) { b->p[0] = value; return ps; } if (b->p[1] == NULL) { b->p[1] = value; return ps; } if (b->p[2] == NULL) { b->p[2] = value; return ps; } if (b->p[3] == NULL) { b->p[3] = value; return ps; } a = (stb_ps_array *) malloc(sizeof(*a) + 7 * sizeof(a->p[0])); // 8 slots, must be 2^k memcpy(a->p, b, sizeof(*b)); a->p[4] = value; a->count = 5; stb_bucket_free(b); return EncodeArray(a); } case STB_ps_array: { stb_ps_array *a = GetArray(ps); if (a->count == stb_ps_array_max) { // promote from array to hash stb_ps_hash *h = stb_ps_makehash(2 << stb_log2_ceil(a->count), a->count, a->p); free(a); return stb_ps_add(EncodeHash(h), value); } // do we need to resize the array? the array doubles in size when it // crosses a power-of-two if ((a->count & (a->count-1))==0) { int newsize = a->count*2; // clamp newsize to max if: // 1. it's larger than max // 2. newsize*1.5 is larger than max (to avoid extra resizing) if (newsize + a->count > stb_ps_array_max) newsize = stb_ps_array_max; a = (stb_ps_array *) realloc(a, sizeof(*a) + (newsize-1) * sizeof(a->p[0])); } a->p[a->count++] = value; return EncodeArray(a); } case STB_ps_hash: { stb_ps_hash *h = GetHash(ps); stb_uint32 hash = stb_hashptr(value); stb_uint32 n = hash & h->mask; void **t = h->table; // find first NULL or STB_DEL entry if (!stb_ps_empty(t[n])) { stb_uint32 s = stb_rehash(hash) | 1; do { n = (n + s) & h->mask; } while (!stb_ps_empty(t[n])); } if (t[n] == STB_DEL) -- h->count_deletes; t[n] = value; ++ h->count; if (h->count == h->grow_threshhold) { stb_ps_hash *h2 = stb_ps_makehash(h->size*2, h->size, t); free(h); return EncodeHash(h2); } if (h->count + h->count_deletes == h->rehash_threshhold) { stb_ps_hash *h2 = stb_ps_makehash(h->size, h->size, t); free(h); return EncodeHash(h2); } return ps; } } return NULL; /* NOTREACHED */ } stb_ps *stb_ps_remove(stb_ps *ps, void *value) { #ifdef STB_DEBUG assert(stb_ps_find(ps, value)); #endif assert((3 & (int) value) == STB_ps_direct); if (value == NULL) return ps; // ignore NULL removes to avoid bad breakage switch (3 & (int) ps) { case STB_ps_direct: return ps == value ? NULL : ps; case STB_ps_bucket: { stb_ps_bucket *b = GetBucket(ps); int count=0; assert(STB_BUCKET_SIZE == 4); if (b->p[0] == value) b->p[0] = NULL; else count += (b->p[0] != NULL); if (b->p[1] == value) b->p[1] = NULL; else count += (b->p[1] != NULL); if (b->p[2] == value) b->p[2] = NULL; else count += (b->p[2] != NULL); if (b->p[3] == value) b->p[3] = NULL; else count += (b->p[3] != NULL); if (count == 1) { // shrink bucket at size 1 value = b->p[0]; if (value == NULL) value = b->p[1]; if (value == NULL) value = b->p[2]; if (value == NULL) value = b->p[3]; assert(value != NULL); stb_bucket_free(b); return (stb_ps *) value; // return STB_ps_direct of value } return ps; } case STB_ps_array: { stb_ps_array *a = GetArray(ps); int i; for (i=0; i < a->count; ++i) { if (a->p[i] == value) { a->p[i] = a->p[--a->count]; if (a->count == 3) { // shrink to bucket! stb_ps_bucket *b = stb_bucket_create3(a->p); free(a); return EncodeBucket(b); } return ps; } } return ps; } case STB_ps_hash: { stb_ps_hash *h = GetHash(ps); stb_uint32 hash = stb_hashptr(value); stb_uint32 s, n = hash & h->mask; void **t = h->table; if (t[n] != value) { s = stb_rehash(hash) | 1; do { n = (n + s) & h->mask; } while (t[n] != value); } t[n] = STB_DEL; -- h->count; ++ h->count_deletes; // should we shrink down to an array? if (h->count < stb_ps_array_max) { int n = 1 << stb_log2_floor(stb_ps_array_max); if (h->count < n) { stb_ps_array *a = (stb_ps_array *) malloc(sizeof(*a) + (n-1) * sizeof(a->p[0])); int i,j=0; for (i=0; i < h->size; ++i) if (!stb_ps_empty(t[i])) a->p[j++] = t[i]; assert(j == h->count); a->count = j; free(h); return EncodeArray(a); } } if (h->count == h->shrink_threshhold) { stb_ps_hash *h2 = stb_ps_makehash(h->size >> 1, h->size, t); free(h); return EncodeHash(h2); } return ps; } } return ps; /* NOTREACHED */ } stb_ps *stb_ps_remove_any(stb_ps *ps, void **value) { assert(ps != NULL); switch (3 & (int) ps) { case STB_ps_direct: *value = ps; return NULL; case STB_ps_bucket: { stb_ps_bucket *b = GetBucket(ps); int count=0, slast=0, last=0; assert(STB_BUCKET_SIZE == 4); if (b->p[0]) { ++count; last = 0; } if (b->p[1]) { ++count; slast = last; last = 1; } if (b->p[2]) { ++count; slast = last; last = 2; } if (b->p[3]) { ++count; slast = last; last = 3; } *value = b->p[last]; b->p[last] = 0; if (count == 2) { void *leftover = b->p[slast]; // second to last stb_bucket_free(b); return (stb_ps *) leftover; } return ps; } case STB_ps_array: { stb_ps_array *a = GetArray(ps); *value = a->p[a->count-1]; if (a->count == 4) return stb_ps_remove(ps, *value); --a->count; return ps; } case STB_ps_hash: { stb_ps_hash *h = GetHash(ps); void **t = h->table; stb_uint32 n = h->any_offset; while (stb_ps_empty(t[n])) n = (n + 1) & h->mask; *value = t[n]; h->any_offset = (n+1) & h->mask; // check if we need to skip down to the previous type if (h->count-1 < stb_ps_array_max || h->count-1 == h->shrink_threshhold) return stb_ps_remove(ps, *value); t[n] = STB_DEL; -- h->count; ++ h->count_deletes; return ps; } } return ps; /* NOTREACHED */ } void ** stb_ps_getlist(stb_ps *ps, int *count) { int i,n=0; void **p = NULL; switch (3 & (int) ps) { case STB_ps_direct: if (ps == NULL) { *count = 0; return NULL; } p = (void **) malloc(sizeof(*p) * 1); p[0] = ps; *count = 1; return p; case STB_ps_bucket: { stb_ps_bucket *b = GetBucket(ps); p = (void **) malloc(sizeof(*p) * STB_BUCKET_SIZE); for (i=0; i < STB_BUCKET_SIZE; ++i) if (b->p[i] != NULL) p[n++] = b->p[i]; break; } case STB_ps_array: { stb_ps_array *a = GetArray(ps); p = (void **) malloc(sizeof(*p) * a->count); memcpy(p, a->p, sizeof(*p) * a->count); *count = a->count; return p; } case STB_ps_hash: { stb_ps_hash *h = GetHash(ps); p = (void **) malloc(sizeof(*p) * h->count); for (i=0; i < h->size; ++i) if (!stb_ps_empty(h->table[i])) p[n++] = h->table[i]; break; } } *count = n; return p; } int stb_ps_writelist(stb_ps *ps, void **list, int size ) { int i,n=0; switch (3 & (int) ps) { case STB_ps_direct: if (ps == NULL || size <= 0) return 0; list[0] = ps; return 1; case STB_ps_bucket: { stb_ps_bucket *b = GetBucket(ps); for (i=0; i < STB_BUCKET_SIZE; ++i) if (b->p[i] != NULL && n < size) list[n++] = b->p[i]; return n; } case STB_ps_array: { stb_ps_array *a = GetArray(ps); n = stb_min(size, a->count); memcpy(list, a->p, sizeof(*list) * n); return n; } case STB_ps_hash: { stb_ps_hash *h = GetHash(ps); if (size <= 0) return 0; for (i=0; i < h->count; ++i) { if (!stb_ps_empty(h->table[i])) { list[n++] = h->table[i]; if (n == size) break; } } return n; } } return 0; /* NOTREACHED */ } int stb_ps_enum(stb_ps *ps, void *data, int (*func)(void *value, void *data)) { int i; switch (3 & (int) ps) { case STB_ps_direct: if (ps == NULL) return STB_TRUE; return func(ps, data); case STB_ps_bucket: { stb_ps_bucket *b = GetBucket(ps); for (i=0; i < STB_BUCKET_SIZE; ++i) if (b->p[i] != NULL) if (!func(b->p[i], data)) return STB_FALSE; return STB_TRUE; } case STB_ps_array: { stb_ps_array *a = GetArray(ps); for (i=0; i < a->count; ++i) if (!func(a->p[i], data)) return STB_FALSE; return STB_TRUE; } case STB_ps_hash: { stb_ps_hash *h = GetHash(ps); for (i=0; i < h->count; ++i) if (!stb_ps_empty(h->table[i])) if (!func(h->table[i], data)) return STB_FALSE; return STB_TRUE; } } return STB_TRUE; /* NOTREACHED */ } int stb_ps_count (stb_ps *ps) { switch (3 & (int) ps) { case STB_ps_direct: return ps != NULL; case STB_ps_bucket: { stb_ps_bucket *b = GetBucket(ps); return (b->p[0] != NULL) + (b->p[1] != NULL) + (b->p[2] != NULL) + (b->p[3] != NULL); } case STB_ps_array: { stb_ps_array *a = GetArray(ps); return a->count; } case STB_ps_hash: { stb_ps_hash *h = GetHash(ps); return h->count; } } return 0; } void ** stb_ps_fastlist(stb_ps *ps, int *count) { static void *storage; switch (3 & (int) ps) { case STB_ps_direct: if (ps == NULL) { *count = 0; return NULL; } storage = ps; *count = 1; return &storage; case STB_ps_bucket: { stb_ps_bucket *b = GetBucket(ps); *count = STB_BUCKET_SIZE; return b->p; } case STB_ps_array: { stb_ps_array *a = GetArray(ps); *count = a->count; return a->p; } case STB_ps_hash: { stb_ps_hash *h = GetHash(ps); *count = h->size; return h->table; } } return NULL; /* NOTREACHED */ } int stb_ps_subset(stb_ps *bigger, stb_ps *smaller) { int i, listlen; void **list = stb_ps_fastlist(smaller, &listlen); for(i=0; i < listlen; ++i) if (stb_ps_fastlist_valid(list[i])) if (!stb_ps_find(bigger, list[i])) return 0; return 1; } int stb_ps_eq(stb_ps *p0, stb_ps *p1) { if (stb_ps_count(p0) != stb_ps_count(p1)) return 0; return stb_ps_subset(p0, p1); } #undef GetBucket #undef GetArray #undef GetHash #undef EncodeBucket #undef EncodeArray #undef EncodeHash #endif ////////////////////////////////////////////////////////////////////////////// // // Random Numbers via Meresenne Twister or LCG // STB_EXTERN unsigned long stb_srandLCG(unsigned long seed); STB_EXTERN unsigned long stb_randLCG(void); STB_EXTERN double stb_frandLCG(void); STB_EXTERN void stb_srand(unsigned long seed); STB_EXTERN unsigned long stb_rand(void); STB_EXTERN double stb_frand(void); STB_EXTERN void stb_shuffle(void *p, size_t n, size_t sz, unsigned long seed); STB_EXTERN void stb_reverse(void *p, size_t n, size_t sz); STB_EXTERN unsigned long stb_randLCG_explicit(unsigned long seed); #define stb_rand_define(x,y) \ \ unsigned long x(void) \ { \ static unsigned long stb__rand = y; \ stb__rand = stb__rand * 2147001325 + 715136305; /* BCPL */ \ return 0x31415926 ^ ((stb__rand >> 16) + (stb__rand << 16)); \ } #ifdef STB_DEFINE unsigned long stb_randLCG_explicit(unsigned long seed) { return seed * 2147001325 + 715136305; } static unsigned long stb__rand_seed=0; unsigned long stb_srandLCG(unsigned long seed) { unsigned long previous = stb__rand_seed; stb__rand_seed = seed; return previous; } unsigned long stb_randLCG(void) { stb__rand_seed = stb__rand_seed * 2147001325 + 715136305; // BCPL generator // shuffle non-random bits to the middle, and xor to decorrelate with seed return 0x31415926 ^ ((stb__rand_seed >> 16) + (stb__rand_seed << 16)); } double stb_frandLCG(void) { return stb_randLCG() / ((double) (1 << 16) * (1 << 16)); } void stb_shuffle(void *p, size_t n, size_t sz, unsigned long seed) { char *a; unsigned long old_seed; int i; if (seed) old_seed = stb_srandLCG(seed); a = (char *) p + (n-1) * sz; for (i=n; i > 1; --i) { int j = stb_randLCG() % i; stb_swap(a, (char *) p + j * sz, sz); a -= sz; } if (seed) stb_srandLCG(old_seed); } void stb_reverse(void *p, size_t n, size_t sz) { int i,j = n-1; for (i=0; i < j; ++i,--j) { stb_swap((char *) p + i * sz, (char *) p + j * sz, sz); } } // public domain Mersenne Twister by Michael Brundage #define STB__MT_LEN 624 int stb__mt_index = STB__MT_LEN*sizeof(unsigned long)+1; unsigned long stb__mt_buffer[STB__MT_LEN]; void stb_srand(unsigned long seed) { int i; unsigned long old = stb_srandLCG(seed); for (i = 0; i < STB__MT_LEN; i++) stb__mt_buffer[i] = stb_randLCG(); stb_srandLCG(old); stb__mt_index = STB__MT_LEN*sizeof(unsigned long); } #define STB__MT_IA 397 #define STB__MT_IB (STB__MT_LEN - STB__MT_IA) #define STB__UPPER_MASK 0x80000000 #define STB__LOWER_MASK 0x7FFFFFFF #define STB__MATRIX_A 0x9908B0DF #define STB__TWIST(b,i,j) ((b)[i] & STB__UPPER_MASK) | ((b)[j] & STB__LOWER_MASK) #define STB__MAGIC(s) (((s)&1)*STB__MATRIX_A) unsigned long stb_rand() { unsigned long * b = stb__mt_buffer; int idx = stb__mt_index; unsigned long s,r; int i; if (idx >= STB__MT_LEN*sizeof(unsigned long)) { if (idx > STB__MT_LEN*sizeof(unsigned long)) stb_srand(0); idx = 0; i = 0; for (; i < STB__MT_IB; i++) { s = STB__TWIST(b, i, i+1); b[i] = b[i + STB__MT_IA] ^ (s >> 1) ^ STB__MAGIC(s); } for (; i < STB__MT_LEN-1; i++) { s = STB__TWIST(b, i, i+1); b[i] = b[i - STB__MT_IB] ^ (s >> 1) ^ STB__MAGIC(s); } s = STB__TWIST(b, STB__MT_LEN-1, 0); b[STB__MT_LEN-1] = b[STB__MT_IA-1] ^ (s >> 1) ^ STB__MAGIC(s); } stb__mt_index = idx + sizeof(unsigned long); r = *(unsigned long *)((unsigned char *)b + idx); r ^= (r >> 11); r ^= (r << 7) & 0x9D2C5680; r ^= (r << 15) & 0xEFC60000; r ^= (r >> 18); return r; } double stb_frand(void) { return stb_rand() / ((double) (1 << 16) * (1 << 16)); } #endif ////////////////////////////////////////////////////////////////////////////// // // stb_dupe // // stb_dupe is a duplicate-finding system for very, very large data // structures--large enough that sorting is too slow, but not so large // that we can't keep all the data in memory. using it works as follows: // // 1. create an stb_dupe: // provide a hash function // provide an equality function // provide an estimate for the size // optionally provide a comparison function // // 2. traverse your data, 'adding' pointers to the stb_dupe // // 3. finish and ask for duplicates // // the stb_dupe will discard its intermediate data and build // a collection of sorted lists of duplicates, with non-duplicate // entries omitted entirely // // // Implementation strategy: // // while collecting the N items, we keep a hash table of approximate // size sqrt(N). (if you tell use the N up front, the hash table is // just that size exactly) // // each entry in the hash table is just an stb__arr of pointers (no need // to use stb_ps, because we don't need to delete from these) // // for step 3, for each entry in the hash table, we apply stb_dupe to it // recursively. once the size gets small enough (or doesn't decrease // significantly), we switch to either using qsort() on the comparison // function, or else we just do the icky N^2 gather typedef struct stb_dupe stb_dupe; typedef int (*stb_compare_func)(void *a, void *b); typedef int (*stb_hash_func)(void *a, unsigned int seed); STB_EXTERN void stb_dupe_free(stb_dupe *sd); STB_EXTERN stb_dupe *stb_dupe_create(stb_hash_func hash, stb_compare_func eq, int size, stb_compare_func ineq); STB_EXTERN void stb_dupe_add(stb_dupe *sd, void *item); STB_EXTERN void stb_dupe_finish(stb_dupe *sd); STB_EXTERN int stb_dupe_numsets(stb_dupe *sd); STB_EXTERN void **stb_dupe_set(stb_dupe *sd, int num); STB_EXTERN int stb_dupe_set_count(stb_dupe *sd, int num); struct stb_dupe { void ***hash_table; int hash_size; int size_log2; int population; int hash_shift; stb_hash_func hash; stb_compare_func eq; stb_compare_func ineq; void ***dupes; }; #ifdef STB_DEFINE int stb_dupe_numsets(stb_dupe *sd) { assert(sd->hash_table == NULL); return stb_arr_len(sd->dupes); } void **stb_dupe_set(stb_dupe *sd, int num) { assert(sd->hash_table == NULL); return sd->dupes[num]; } int stb_dupe_set_count(stb_dupe *sd, int num) { assert(sd->hash_table == NULL); return stb_arr_len(sd->dupes[num]); } stb_dupe *stb_dupe_create(stb_hash_func hash, stb_compare_func eq, int size, stb_compare_func ineq) { int i, hsize; stb_dupe *sd = (stb_dupe *) malloc(sizeof(*sd)); sd->size_log2 = 4; hsize = 1 << sd->size_log2; while (hsize * hsize < size) { ++sd->size_log2; hsize *= 2; } sd->hash = hash; sd->eq = eq; sd->ineq = ineq; sd->hash_shift = 0; sd->population = 0; sd->hash_size = hsize; sd->hash_table = (void ***) malloc(sizeof(*sd->hash_table) * hsize); for (i=0; i < hsize; ++i) sd->hash_table[i] = NULL; sd->dupes = NULL; return sd; } void stb_dupe_add(stb_dupe *sd, void *item) { stb_uint32 hash = sd->hash(item, sd->hash_shift); int z = hash & (sd->hash_size-1); stb_arr_push(sd->hash_table[z], item); ++sd->population; } void stb_dupe_free(stb_dupe *sd) { int i; for (i=0; i < stb_arr_len(sd->dupes); ++i) if (sd->dupes[i]) stb_arr_free(sd->dupes[i]); stb_arr_free(sd->dupes); free(sd); } static stb_compare_func stb__compare; static int stb__dupe_compare(const void *a, const void *b) { void *p = *(void **) a; void *q = *(void **) b; return stb__compare(p,q); } void stb_dupe_finish(stb_dupe *sd) { int i,j,k; assert(sd->dupes == NULL); for (i=0; i < sd->hash_size; ++i) { void ** list = sd->hash_table[i]; if (list != NULL) { int n = stb_arr_len(list); // @TODO: measure to find good numbers instead of just making them up! int thresh = (sd->ineq ? 200 : 20); // if n is large enough to be worth it, and n is smaller than // before (so we can guarantee we'll use a smaller hash table); // and there are enough hash bits left, assuming full 32-bit hash if (n > thresh && n < (sd->population >> 3) && sd->hash_shift + sd->size_log2*2 < 32) { // recursively process this row using stb_dupe, O(N log log N) stb_dupe *d = stb_dupe_create(sd->hash, sd->eq, n, sd->ineq); d->hash_shift = stb_randLCG_explicit(sd->hash_shift); for (j=0; j < n; ++j) stb_dupe_add(d, list[j]); stb_arr_free(sd->hash_table[i]); stb_dupe_finish(d); for (j=0; j < stb_arr_len(d->dupes); ++j) { stb_arr_push(sd->dupes, d->dupes[j]); d->dupes[j] = NULL; // take over ownership } stb_dupe_free(d); } else if (sd->ineq) { // process this row using qsort(), O(N log N) stb__compare = sd->ineq; qsort(list, n, sizeof(list[0]), stb__dupe_compare); // find equal subsequences of the list for (j=0; j < n-1; ) { // find a subsequence from j..k for (k=j; k < n; ++k) // only use ineq so eq can be left undefined if (sd->ineq(list[j], list[k])) break; // k is the first one not in the subsequence if (k-j > 1) { void **mylist = NULL; stb_arr_setlen(mylist, k-j); memcpy(mylist, list+j, sizeof(list[j]) * (k-j)); stb_arr_push(sd->dupes, mylist); } j = k; } stb_arr_free(sd->hash_table[i]); } else { // process this row using eq(), O(N^2) for (j=0; j < n; ++j) { if (list[j] != NULL) { void **output = NULL; for (k=j+1; k < n; ++k) { if (sd->eq(list[j], list[k])) { if (output == NULL) stb_arr_push(output, list[j]); stb_arr_push(output, list[k]); list[k] = NULL; } } list[j] = NULL; if (output) stb_arr_push(sd->dupes, output); } } stb_arr_free(sd->hash_table[i]); } } } free(sd->hash_table); sd->hash_table = NULL; } #endif ////////////////////////////////////////////////////////////////////////////// // // templatized Sort routine // // This is an attempt to implement a templated sorting algorithm. // To use it, you have to explicitly instantiate it as a _function_, // then you call that function. This allows the comparison to be inlined, // giving the sort similar performance to C++ sorts. // // It implements quicksort with three-way-median partitioning (generally // well-behaved), with a final insertion sort pass. // // When you define the compare expression, you should assume you have // elements of your array pointed to by 'a' and 'b', and perform the comparison // on those. OR you can use one or more statements; first say '0;', then // write whatever code you want, and compute the result into a variable 'c'. #define stb_declare_sort(FUNCNAME, TYPE) \ void FUNCNAME(TYPE *p, int n) #define stb_define_sort(FUNCNAME,TYPE,COMPARE) \ stb__define_sort( void, FUNCNAME,TYPE,COMPARE) #define stb_define_sort_static(FUNCNAME,TYPE,COMPARE) \ stb__define_sort(static void, FUNCNAME,TYPE,COMPARE) #define stb__define_sort(MODE, FUNCNAME, TYPE, COMPARE) \ \ static void STB_(FUNCNAME,_ins_sort)(TYPE *p, int n) \ { \ int i,j; \ for (i=1; i < n; ++i) { \ TYPE t = p[i], *a = &t; \ j = i; \ while (j > 0) { \ TYPE *b = &p[j-1]; \ int c = COMPARE; \ if (!c) break; \ p[j] = p[j-1]; \ --j; \ } \ if (i != j) \ p[j] = t; \ } \ } \ \ static void STB_(FUNCNAME,_quicksort)(TYPE *p, int n) \ { \ /* threshhold for transitioning to insertion sort */ \ while (n > 12) { \ TYPE *a,*b,t; \ int c01,c12,c,m,i,j; \ \ /* compute median of three */ \ m = n >> 1; \ a = &p[0]; \ b = &p[m]; \ c = COMPARE; \ c01 = c; \ a = &p[m]; \ b = &p[n-1]; \ c = COMPARE; \ c12 = c; \ /* if 0 >= mid >= end, or 0 < mid < end, then use mid */ \ if (c01 != c12) { \ /* otherwise, we'll need to swap something else to middle */ \ int z; \ a = &p[0]; \ b = &p[n-1]; \ c = COMPARE; \ /* 0>mid && midn => n; 0 0 */ \ /* 0n: 0>n => 0; 0 n */ \ z = (c == c12) ? 0 : n-1; \ t = p[z]; \ p[z] = p[m]; \ p[m] = t; \ } \ /* now p[m] is the median-of-three */ \ /* swap it to the beginning so it won't move around */ \ t = p[0]; \ p[0] = p[m]; \ p[m] = t; \ \ /* partition loop */ \ i=1; \ j=n-1; \ for(;;) { \ /* handling of equality is crucial here */ \ /* for sentinels & efficiency with duplicates */ \ b = &p[0]; \ for (;;++i) { \ a=&p[i]; \ c = COMPARE; \ if (!c) break; \ } \ a = &p[0]; \ for (;;--j) { \ b=&p[j]; \ c = COMPARE; \ if (!c) break; \ } \ /* make sure we haven't crossed */ \ if (i >= j) break; \ t = p[i]; \ p[i] = p[j]; \ p[j] = t; \ \ ++i; \ --j; \ } \ /* recurse on smaller side, iterate on larger */ \ if (j < (n-i)) { \ STB_(FUNCNAME,_quicksort)(p,j); \ p = p+i; \ n = n-i; \ } else { \ STB_(FUNCNAME,_quicksort)(p+i, n-i); \ n = j; \ } \ } \ } \ \ MODE FUNCNAME(TYPE *p, int n) \ { \ STB_(FUNCNAME, _quicksort)(p, n); \ STB_(FUNCNAME, _ins_sort)(p, n); \ } \ ////////////////////////////////////////////////////////////////////////////// // // stb_bitset an array of booleans indexed by integers // typedef stb_uint32 stb_bitset; STB_EXTERN stb_bitset *stb_bitset_new(int value, int len); #define stb_bitset_clearall(arr,len) (memset(arr, 0, 4 * (len))) #define stb_bitset_setall(arr,len) (memset(arr, 255, 4 * (len))) #define stb_bitset_setbit(arr,n) ((arr)[(n) >> 5] |= (1 << (n & 31))) #define stb_bitset_clearbit(arr,n) ((arr)[(n) >> 5] &= ~(1 << (n & 31))) #define stb_bitset_testbit(arr,n) ((arr)[(n) >> 5] & (1 << (n & 31))) STB_EXTERN stb_bitset *stb_bitset_union(stb_bitset *p0, stb_bitset *p1, int len); STB_EXTERN int *stb_bitset_getlist(stb_bitset *out, int start, int end); STB_EXTERN int stb_bitset_eq(stb_bitset *p0, stb_bitset *p1, int len); STB_EXTERN int stb_bitset_disjoint(stb_bitset *p0, stb_bitset *p1, int len); STB_EXTERN int stb_bitset_disjoint_0(stb_bitset *p0, stb_bitset *p1, int len); STB_EXTERN int stb_bitset_subset(stb_bitset *bigger, stb_bitset *smaller, int len); STB_EXTERN int stb_bitset_unioneq_changed(stb_bitset *p0, stb_bitset *p1, int len); #ifdef STB_DEFINE int stb_bitset_eq(stb_bitset *p0, stb_bitset *p1, int len) { int i; for (i=0; i < len; ++i) if (p0[i] != p1[i]) return 0; return 1; } int stb_bitset_disjoint(stb_bitset *p0, stb_bitset *p1, int len) { int i; for (i=0; i < len; ++i) if (p0[i] & p1[i]) return 0; return 1; } int stb_bitset_disjoint_0(stb_bitset *p0, stb_bitset *p1, int len) { int i; for (i=0; i < len; ++i) if ((p0[i] | p1[i]) != 0xffffffff) return 0; return 1; } int stb_bitset_subset(stb_bitset *bigger, stb_bitset *smaller, int len) { int i; for (i=0; i < len; ++i) if ((bigger[i] & smaller[i]) != smaller[i]) return 0; return 1; } stb_bitset *stb_bitset_union(stb_bitset *p0, stb_bitset *p1, int len) { int i; stb_bitset *d = (stb_bitset *) malloc(sizeof(*d) * len); for (i=0; i < len; ++i) d[i] = p0[i] | p1[i]; return d; } int stb_bitset_unioneq_changed(stb_bitset *p0, stb_bitset *p1, int len) { int i, changed=0; for (i=0; i < len; ++i) { stb_bitset d = p0[i] | p1[i]; if (d != p0[i]) { p0[i] = d; changed = 1; } } return changed; } stb_bitset *stb_bitset_new(int value, int len) { int i; stb_bitset *d = (stb_bitset *) malloc(sizeof(*d) * len); if (value) value = 0xffffffff; for (i=0; i < len; ++i) d[i] = value; return d; } int *stb_bitset_getlist(stb_bitset *out, int start, int end) { int *list = NULL; int i; for (i=start; i < end; ++i) if (stb_bitset_testbit(out, i)) stb_arr_push(list, i); return list; } #endif ////////////////////////////////////////////////////////////////////////////// // // stb_wordwrap quality word-wrapping for fixed-width fonts // STB_EXTERN int stb_wordwrap(int *pairs, int pair_max, int count, char *str); STB_EXTERN int *stb_wordwrapalloc(int count, char *str); #ifdef STB_DEFINE int stb_wordwrap(int *pairs, int pair_max, int count, char *str) { int n=0,i=0, start=0,nonwhite=0; if (pairs == NULL) pair_max = 0x7ffffff0; else pair_max *= 2; // parse for(;;) { int s=i; // first whitespace char; last nonwhite+1 int w; // word start // accept whitespace while (isspace(str[i])) { if (str[i] == '\n' || str[i] == '\r') { if (str[i] + str[i+1] == '\n' + '\r') ++i; if (n >= pair_max) return -1; if (pairs) pairs[n] = start, pairs[n+1] = s-start; n += 2; nonwhite=0; start = i+1; s = start; } ++i; } if (i >= start+count) { // we've gone off the end using whitespace if (nonwhite) { if (n >= pair_max) return -1; if (pairs) pairs[n] = start, pairs[n+1] = s-start; n += 2; start = s = i; nonwhite=0; } else { // output all the whitespace while (i >= start+count) { if (n >= pair_max) return -1; if (pairs) pairs[n] = start, pairs[n+1] = count; n += 2; start += count; } s = start; } } if (str[i] == 0) break; // now scan out a word and see if it fits w = i; while (str[i] && !isspace(str[i])) { ++i; } // wrapped? if (i > start + count) { // huge? if (i-s <= count) { if (n >= pair_max) return -1; if (pairs) pairs[n] = start, pairs[n+1] = s-start; n += 2; start = w; } else { // This word is longer than one line. If we wrap it onto N lines // there are leftover chars. do those chars fit on the cur line? // But if we have leading whitespace, we force it to start here. if ((w-start) + ((i-w) % count) <= count || !nonwhite) { // output a full line if (n >= pair_max) return -1; if (pairs) pairs[n] = start, pairs[n+1] = count; n += 2; start += count; w = start; } else { // output a partial line, trimming trailing whitespace if (s != start) { if (n >= pair_max) return -1; if (pairs) pairs[n] = start, pairs[n+1] = s-start; n += 2; start = w; } } // now output full lines as needed while (start + count <= i) { if (n >= pair_max) return -1; if (pairs) pairs[n] = start, pairs[n+1] = count; n += 2; start += count; } } } nonwhite=1; } if (start < i) { if (n >= pair_max) return -1; if (pairs) pairs[n] = start, pairs[n+1] = i-start; n += 2; } return n>>1; } int *stb_wordwrapalloc(int count, char *str) { int n = stb_wordwrap(NULL,0,count,str); int *z = NULL; stb_arr_setlen(z, n*2); stb_wordwrap(z, n, count, str); return z; } #endif ////////////////////////////////////////////////////////////////////////////// // // stb_match: wildcards and regexping // STB_EXTERN int stb_wildmatch (char *expr, char *candidate); STB_EXTERN int stb_wildmatchi(char *expr, char *candidate); STB_EXTERN int stb_wildfind (char *expr, char *candidate); STB_EXTERN int stb_wildfindi (char *expr, char *candidate); STB_EXTERN int stb_regex(char *regex, char *candidate); typedef struct stb_matcher stb_matcher; STB_EXTERN stb_matcher *stb_regex_matcher(char *regex); STB_EXTERN int stb_matcher_match(stb_matcher *m, char *str); STB_EXTERN int stb_matcher_find(stb_matcher *m, char *str); STB_EXTERN void stb_matcher_free(stb_matcher *f); STB_EXTERN stb_matcher *stb_lex_matcher(void); STB_EXTERN int stb_lex_item(stb_matcher *m, char *str, int result); STB_EXTERN int stb_lex_item_wild(stb_matcher *matcher, char *regex, int result); STB_EXTERN int stb_lex(stb_matcher *m, char *str, int *len); #ifdef STB_DEFINE static int stb__match_qstring(char *candidate, char *qstring, int qlen, int insensitive) { int i; if (insensitive) { for (i=0; i < qlen; ++i) if (qstring[i] == '?') { if (!candidate[i]) return 0; } else if (tolower(qstring[i]) != tolower(candidate[i])) return 0; } else { for (i=0; i < qlen; ++i) if (qstring[i] == '?') { if (!candidate[i]) return 0; } else if (qstring[i] != candidate[i]) return 0; } return 1; } static int stb__find_qstring(char *candidate, char *qstring, int qlen, int insensitive) { char c; int offset=0; while (*qstring == '?') { ++qstring; --qlen; ++candidate; if (qlen == 0) return 0; if (*candidate == 0) return -1; } c = *qstring++; --qlen; if (insensitive) c = tolower(c); while (candidate[offset]) { if (c == (insensitive ? tolower(candidate[offset]) : candidate[offset])) if (stb__match_qstring(candidate+offset+1, qstring, qlen, insensitive)) return offset; ++offset; } return -1; } int stb__wildmatch_raw2(char *expr, char *candidate, int search, int insensitive) { int where=0; int start = -1; if (!search) { // parse to first '*' if (*expr != '*') start = 0; while (*expr != '*') { if (!*expr) return *candidate == 0 ? 0 : -1; if (*expr == '?') { if (!*candidate) return -1; } else { if (insensitive) { if (tolower(*candidate) != tolower(*expr)) return -1; } else if (*candidate != *expr) return -1; } ++candidate, ++expr, ++where; } } else { // 0-length search string if (!*expr) return 0; } assert(search || *expr == '*'); if (!search) ++expr; // implicit '*' at this point while (*expr) { int o=0; // combine redundant * characters while (expr[0] == '*') ++expr; // ok, at this point, expr[-1] == '*', // and expr[0] != '*' if (!expr[0]) return start >= 0 ? start : 0; // now find next '*' o = 0; while (expr[o] != '*') { if (expr[o] == 0) break; ++o; } // if no '*', scan to end, then match at end if (expr[o] == 0 && !search) { int z; for (z=0; z < o; ++z) if (candidate[z] == 0) return -1; while (candidate[z]) ++z; // ok, now check if they match if (stb__match_qstring(candidate+z-o, expr, o, insensitive)) return start >= 0 ? start : 0; return -1; } else { // if yes '*', then do stb__find_qmatch on the intervening chars int n = stb__find_qstring(candidate, expr, o, insensitive); if (n < 0) return -1; if (start < 0) start = where + n; expr += o; candidate += n+o; } if (*expr == 0) { assert(search); return start; } assert(*expr == '*'); ++expr; } return start >= 0 ? start : 0; } int stb__wildmatch_raw(char *expr, char *candidate, int search, int insensitive) { char buffer[256]; // handle multiple search strings char *s = strchr(expr, ';'); char *last = expr; while (s) { int z; // need to allow for non-writeable strings... assume they're small if (s - last < 256) { stb_strncpy(buffer, last, s-last+1); z = stb__wildmatch_raw2(buffer, candidate, search, insensitive); } else { *s = 0; z = stb__wildmatch_raw2(last, candidate, search, insensitive); *s = ';'; } if (z >= 0) return z; last = s+1; s = strchr(last, ';'); } return stb__wildmatch_raw2(last, candidate, search, insensitive); } int stb_wildmatch(char *expr, char *candidate) { return stb__wildmatch_raw(expr, candidate, 0,0) >= 0; } int stb_wildmatchi(char *expr, char *candidate) { return stb__wildmatch_raw(expr, candidate, 0,1) >= 0; } int stb_wildfind(char *expr, char *candidate) { return stb__wildmatch_raw(expr, candidate, 1,0); } int stb_wildfindi(char *expr, char *candidate) { return stb__wildmatch_raw(expr, candidate, 1,1); } typedef struct { stb_int16 transition[256]; } stb_dfa; // an NFA node represents a state you're in; it then has // an arbitrary number of edges dangling off of it // note this isn't utf8-y typedef struct { stb_int16 match; // character/set to match stb_uint16 node; // output node to go to } stb_nfa_edge; typedef struct { stb_int16 goal; // does reaching this win the prize? stb_uint8 active; // is this in the active list stb_nfa_edge *out; stb_uint16 *eps; // list of epsilon closures } stb_nfa_node; #define STB__DFA_UNDEF -1 #define STB__DFA_GOAL -2 #define STB__DFA_END -3 #define STB__DFA_MGOAL -4 #define STB__DFA_VALID 0 #define STB__NFA_STOP_GOAL -1 // compiled regexp struct stb_matcher { stb_uint16 start_node; stb_int16 dfa_start; stb_uint32 *charset; int num_charset; int match_start; stb_nfa_node *nodes; int does_lex; // dfa matcher stb_dfa * dfa; stb_uint32 * dfa_mapping; stb_int16 * dfa_result; int num_words_per_dfa; }; static int stb__add_node(stb_matcher *matcher) { stb_nfa_node z; z.active = 0; z.eps = 0; z.goal = 0; z.out = 0; stb_arr_push(matcher->nodes, z); return stb_arr_len(matcher->nodes)-1; } static void stb__add_epsilon(stb_matcher *matcher, int from, int to) { assert(from != to); if (matcher->nodes[from].eps == NULL) stb_arr_malloc((void **) &matcher->nodes[from].eps, matcher); stb_arr_push(matcher->nodes[from].eps, to); } static void stb__add_edge(stb_matcher *matcher, int from, int to, int type) { stb_nfa_edge z = { type, to }; if (matcher->nodes[from].out == NULL) stb_arr_malloc((void **) &matcher->nodes[from].out, matcher); stb_arr_push(matcher->nodes[from].out, z); } static char *stb__reg_parse_alt(stb_matcher *m, int s, char *r, stb_uint16 *e); static char *stb__reg_parse(stb_matcher *matcher, int start, char *regex, stb_uint16 *end) { int n; int last_start = -1; stb_uint16 last_end = start; while (*regex) { switch (*regex) { case '(': last_start = last_end; regex = stb__reg_parse_alt(matcher, last_end, regex+1, &last_end); if (regex == NULL || *regex != ')') return NULL; ++regex; break; case '|': case ')': *end = last_end; return regex; case '?': if (last_start < 0) return NULL; stb__add_epsilon(matcher, last_start, last_end); ++regex; break; case '*': if (last_start < 0) return NULL; stb__add_epsilon(matcher, last_start, last_end); // fall through case '+': if (last_start < 0) return NULL; stb__add_epsilon(matcher, last_end, last_start); // prevent links back to last_end from chaining to last_start n = stb__add_node(matcher); stb__add_epsilon(matcher, last_end, n); last_end = n; ++regex; break; case '{': // not supported! // @TODO: given {n,m}, clone last_start to last_end m times, // and include epsilons from start to first m-n blocks return NULL; case '\\': ++regex; if (!*regex) return NULL; // fallthrough default: // match exactly this character n = stb__add_node(matcher); stb__add_edge(matcher, last_end, n, *regex); last_start = last_end; last_end = n; ++regex; break; case '$': n = stb__add_node(matcher); stb__add_edge(matcher, last_end, n, '\n'); last_start = last_end; last_end = n; ++regex; break; case '.': n = stb__add_node(matcher); stb__add_edge(matcher, last_end, n, -1); last_start = last_end; last_end = n; ++regex; break; case '[': { stb_uint8 flags[256]; int invert = 0,z; ++regex; if (matcher->num_charset == 0) { matcher->charset = (stb_uint *) stb_malloc(matcher, sizeof(*matcher->charset) * 256); memset(matcher->charset, 0, sizeof(*matcher->charset) * 256); } memset(flags,0,sizeof(flags)); // leading ^ is special if (*regex == '^') ++regex, invert = 1; // leading ] is special if (*regex == ']') { flags[']'] = 1; ++regex; } while (*regex != ']') { stb_uint a; if (!*regex) return NULL; a = *regex++; if (regex[0] == '-' && regex[1] != ']') { stb_uint i,b = regex[1]; regex += 2; if (b == 0) return NULL; if (a > b) return NULL; for (i=a; i <= b; ++i) flags[i] = 1; } else flags[a] = 1; } ++regex; if (invert) { int i; for (i=0; i < 256; ++i) flags[i] = 1-flags[i]; } // now check if any existing charset matches for (z=0; z < matcher->num_charset; ++z) { int i, k[2] = { 0, 1 << z}; for (i=0; i < 256; ++i) { unsigned int f = k[flags[i]]; if ((matcher->charset[i] & k[1]) != f) break; } if (i == 256) break; } if (z == matcher->num_charset) { int i; ++matcher->num_charset; if (matcher->num_charset > 32) { assert(0); /* NOTREACHED */ return NULL; // too many charsets, oops } for (i=0; i < 256; ++i) if (flags[i]) matcher->charset[i] |= (1 << z); } n = stb__add_node(matcher); stb__add_edge(matcher, last_end, n, -2 - z); last_start = last_end; last_end = n; break; } } } *end = last_end; return regex; } static char *stb__reg_parse_alt(stb_matcher *matcher, int start, char *regex, stb_uint16 *end) { stb_uint16 last_end = start; stb_uint16 main_end; int head, tail; head = stb__add_node(matcher); stb__add_epsilon(matcher, start, head); regex = stb__reg_parse(matcher, head, regex, &last_end); if (regex == NULL) return NULL; if (*regex == 0 || *regex == ')') { *end = last_end; return regex; } main_end = last_end; tail = stb__add_node(matcher); stb__add_epsilon(matcher, last_end, tail); // start alternatives from the same starting node; use epsilon // transitions to combine their endings while(*regex && *regex != ')') { assert(*regex == '|'); head = stb__add_node(matcher); stb__add_epsilon(matcher, start, head); regex = stb__reg_parse(matcher, head, regex+1, &last_end); if (regex == NULL) return NULL; stb__add_epsilon(matcher, last_end, tail); } *end = tail; return regex; } static char *stb__wild_parse(stb_matcher *matcher, int start, char *str, stb_uint16 *end) { int n; stb_uint16 last_end; last_end = stb__add_node(matcher); stb__add_epsilon(matcher, start, last_end); while (*str) { switch (*str) { // fallthrough default: // match exactly this character n = stb__add_node(matcher); if (toupper(*str) == tolower(*str)) { stb__add_edge(matcher, last_end, n, *str); } else { stb__add_edge(matcher, last_end, n, tolower(*str)); stb__add_edge(matcher, last_end, n, toupper(*str)); } last_end = n; ++str; break; case '?': n = stb__add_node(matcher); stb__add_edge(matcher, last_end, n, -1); last_end = n; ++str; break; case '*': n = stb__add_node(matcher); stb__add_edge(matcher, last_end, n, -1); stb__add_epsilon(matcher, last_end, n); stb__add_epsilon(matcher, n, last_end); last_end = n; ++str; break; } } // now require end of string to match n = stb__add_node(matcher); stb__add_edge(matcher, last_end, n, 0); last_end = n; *end = last_end; return str; } static int stb__opt(stb_matcher *m, int n) { for(;;) { stb_nfa_node *p = &m->nodes[n]; if (p->goal) return n; if (stb_arr_len(p->out)) return n; if (stb_arr_len(p->eps) != 1) return n; n = p->eps[0]; } } static void stb__optimize(stb_matcher *m) { // if the target of any edge is a node with exactly // one out-epsilon, shorten it int i,j; for (i=0; i < stb_arr_len(m->nodes); ++i) { stb_nfa_node *p = &m->nodes[i]; for (j=0; j < stb_arr_len(p->out); ++j) p->out[j].node = stb__opt(m,p->out[j].node); for (j=0; j < stb_arr_len(p->eps); ++j) p->eps[j] = stb__opt(m,p->eps[j] ); } m->start_node = stb__opt(m,m->start_node); } void stb_matcher_free(stb_matcher *f) { stb_free(f); } static stb_matcher *stb__alloc_matcher(void) { stb_matcher *matcher = (stb_matcher *) stb_malloc(0,sizeof(*matcher)); matcher->start_node = 0; stb_arr_malloc((void **) &matcher->nodes, matcher); matcher->num_charset = 0; matcher->match_start = 0; matcher->does_lex = 0; matcher->dfa_start = STB__DFA_UNDEF; stb_arr_malloc((void **) &matcher->dfa, matcher); stb_arr_malloc((void **) &matcher->dfa_mapping, matcher); stb_arr_malloc((void **) &matcher->dfa_result, matcher); stb__add_node(matcher); return matcher; } static void stb__lex_reset(stb_matcher *matcher) { // flush cached dfa data stb_arr_setlen(matcher->dfa, 0); stb_arr_setlen(matcher->dfa_mapping, 0); stb_arr_setlen(matcher->dfa_result, 0); matcher->dfa_start = STB__DFA_UNDEF; } stb_matcher *stb_regex_matcher(char *regex) { char *z; stb_uint16 end; stb_matcher *matcher = stb__alloc_matcher(); if (*regex == '^') { matcher->match_start = 1; ++regex; } z = stb__reg_parse_alt(matcher, matcher->start_node, regex, &end); if (!z || *z) { stb_free(matcher); return NULL; } ((matcher->nodes)[(int) end]).goal = STB__NFA_STOP_GOAL; return matcher; } stb_matcher *stb_lex_matcher(void) { stb_matcher *matcher = stb__alloc_matcher(); matcher->match_start = 1; matcher->does_lex = 1; return matcher; } int stb_lex_item(stb_matcher *matcher, char *regex, int result) { char *z; stb_uint16 end; z = stb__reg_parse_alt(matcher, matcher->start_node, regex, &end); if (z == NULL) return 0; stb__lex_reset(matcher); matcher->nodes[(int) end].goal = result; return 1; } int stb_lex_item_wild(stb_matcher *matcher, char *regex, int result) { char *z; stb_uint16 end; z = stb__wild_parse(matcher, matcher->start_node, regex, &end); if (z == NULL) return 0; stb__lex_reset(matcher); matcher->nodes[(int) end].goal = result; return 1; } static void stb__clear(stb_matcher *m, stb_uint16 *list) { int i; for (i=0; i < stb_arr_len(list); ++i) m->nodes[(int) list[i]].active = 0; } static int stb__clear_goalcheck(stb_matcher *m, stb_uint16 *list) { int i, t=0; for (i=0; i < stb_arr_len(list); ++i) { t += m->nodes[(int) list[i]].goal; m->nodes[(int) list[i]].active = 0; } return t; } static stb_uint16 * stb__add_if_inactive(stb_matcher *m, stb_uint16 *list, int n) { if (!m->nodes[n].active) { stb_arr_push(list, n); m->nodes[n].active = 1; } return list; } static stb_uint16 * stb__eps_closure(stb_matcher *m, stb_uint16 *list) { int i,n = stb_arr_len(list); for(i=0; i < n; ++i) { stb_uint16 *e = m->nodes[(int) list[i]].eps; if (e) { int j,k = stb_arr_len(e); for (j=0; j < k; ++j) list = stb__add_if_inactive(m, list, e[j]); n = stb_arr_len(list); } } return list; } int stb_matcher_match(stb_matcher *m, char *str) { int result = 0; int i,j,y,z; stb_uint16 *previous = NULL; stb_uint16 *current = NULL; stb_uint16 *temp; stb_arr_setsize(previous, 4); stb_arr_setsize(current, 4); previous = stb__add_if_inactive(m, previous, m->start_node); previous = stb__eps_closure(m,previous); stb__clear(m, previous); while (*str && stb_arr_len(previous)) { y = stb_arr_len(previous); for (i=0; i < y; ++i) { stb_nfa_node *n = &m->nodes[(int) previous[i]]; z = stb_arr_len(n->out); for (j=0; j < z; ++j) { if (n->out[j].match >= 0) { if (n->out[j].match == *str) current = stb__add_if_inactive(m, current, n->out[j].node); } else if (n->out[j].match == -1) { if (*str != '\n') current = stb__add_if_inactive(m, current, n->out[j].node); } else if (n->out[j].match < -1) { int z = -n->out[j].match - 2; if (m->charset[(stb_uint8) *str] & (1 << z)) current = stb__add_if_inactive(m, current, n->out[j].node); } } } stb_arr_setlen(previous, 0); temp = previous; previous = current; current = temp; previous = stb__eps_closure(m,previous); stb__clear(m, previous); ++str; } // transition to pick up a '$' at the end y = stb_arr_len(previous); for (i=0; i < y; ++i) m->nodes[(int) previous[i]].active = 1; for (i=0; i < y; ++i) { stb_nfa_node *n = &m->nodes[(int) previous[i]]; z = stb_arr_len(n->out); for (j=0; j < z; ++j) { if (n->out[j].match == '\n') current = stb__add_if_inactive(m, current, n->out[j].node); } } previous = stb__eps_closure(m,previous); stb__clear(m, previous); y = stb_arr_len(previous); for (i=0; i < y; ++i) if (m->nodes[(int) previous[i]].goal) result = 1; stb_arr_free(previous); stb_arr_free(current); return result && *str == 0; } stb_int16 stb__get_dfa_node(stb_matcher *m, stb_uint16 *list) { stb_uint16 node; stb_uint32 data[8], *state, *newstate; int i,j,n; state = (stb_uint32 *) stb_temp(data, m->num_words_per_dfa * 4); memset(state, 0, m->num_words_per_dfa*4); n = stb_arr_len(list); for (i=0; i < n; ++i) { int x = list[i]; state[x >> 5] |= 1 << (x & 31); } // @TODO use a hash table n = stb_arr_len(m->dfa_mapping); i=j=0; for(; j < n; ++i, j += m->num_words_per_dfa) { // @TODO special case for <= 32 if (!memcmp(state, m->dfa_mapping + j, m->num_words_per_dfa*4)) { node = i; goto done; } } assert(stb_arr_len(m->dfa) == i); node = i; newstate = stb_arr_addn(m->dfa_mapping, m->num_words_per_dfa); memcpy(newstate, state, m->num_words_per_dfa*4); // set all transitions to 'unknown' stb_arr_add(m->dfa); memset(m->dfa[i].transition, -1, sizeof(m->dfa[i].transition)); if (m->does_lex) { int result = -1; n = stb_arr_len(list); for (i=0; i < n; ++i) { if (m->nodes[(int) list[i]].goal > result) result = m->nodes[(int) list[i]].goal; } stb_arr_push(m->dfa_result, result); } done: stb_tempfree(data, state); return node; } static int stb__matcher_dfa(stb_matcher *m, char *str_c, int *len) { stb_uint8 *str = (stb_uint8 *) str_c; stb_int16 node,prevnode; stb_dfa *trans; int match_length = 0; stb_int16 match_result=0; if (m->dfa_start == STB__DFA_UNDEF) { stb_uint16 *list; m->num_words_per_dfa = (stb_arr_len(m->nodes)+31) >> 5; stb__optimize(m); list = stb__add_if_inactive(m, NULL, m->start_node); list = stb__eps_closure(m,list); if (m->does_lex) { m->dfa_start = stb__get_dfa_node(m,list); stb__clear(m, list); // DON'T allow start state to be a goal state! // this allows people to specify regexes that can match 0 // characters without them actually matching (also we don't // check _before_ advancing anyway if (m->dfa_start <= STB__DFA_MGOAL) m->dfa_start = -(m->dfa_start - STB__DFA_MGOAL); } else { if (stb__clear_goalcheck(m, list)) m->dfa_start = STB__DFA_GOAL; else m->dfa_start = stb__get_dfa_node(m,list); } stb_arr_free(list); } prevnode = STB__DFA_UNDEF; node = m->dfa_start; trans = m->dfa; if (m->dfa_start == STB__DFA_GOAL) return 1; for(;;) { assert(node >= STB__DFA_VALID); // fast inner DFA loop; especially if STB__DFA_VALID is 0 do { prevnode = node; node = trans[node].transition[*str++]; } while (node >= STB__DFA_VALID); assert(node >= STB__DFA_MGOAL - stb_arr_len(m->dfa)); assert(node < stb_arr_len(m->dfa)); // special case for lex: need _longest_ match, so notice goal // state without stopping if (node <= STB__DFA_MGOAL) { match_length = str - (stb_uint8 *) str_c; node = -(node - STB__DFA_MGOAL); match_result = node; continue; } // slow NFA->DFA conversion // or we hit the goal or the end of the string, but those // can only happen once per search... if (node == STB__DFA_UNDEF) { // build a list -- @TODO special case <= 32 states // heck, use a more compact data structure for <= 16 and <= 8 ?! // @TODO keep states/newstates around instead of reallocating them stb_uint16 *states = NULL; stb_uint16 *newstates = NULL; int i,j,y,z; stb_uint32 *flags = &m->dfa_mapping[prevnode * m->num_words_per_dfa]; assert(prevnode != STB__DFA_UNDEF); stb_arr_setsize(states, 4); stb_arr_setsize(newstates,4); for (j=0; j < m->num_words_per_dfa; ++j) { for (i=0; i < 32; ++i) { if (*flags & (1 << i)) stb_arr_push(states, j*32+i); } ++flags; } // states is now the states we were in in the previous node; // so now we can compute what node it transitions to on str[-1] y = stb_arr_len(states); for (i=0; i < y; ++i) { stb_nfa_node *n = &m->nodes[(int) states[i]]; z = stb_arr_len(n->out); for (j=0; j < z; ++j) { if (n->out[j].match >= 0) { if (n->out[j].match == str[-1] || (str[-1] == 0 && n->out[j].match == '\n')) newstates = stb__add_if_inactive(m, newstates, n->out[j].node); } else if (n->out[j].match == -1) { if (str[-1] != '\n' && str[-1]) newstates = stb__add_if_inactive(m, newstates, n->out[j].node); } else if (n->out[j].match < -1) { int z = -n->out[j].match - 2; if (m->charset[str[-1]] & (1 << z)) newstates = stb__add_if_inactive(m, newstates, n->out[j].node); } } } // AND add in the start state! if (!m->match_start || (str[-1] == '\n' && !m->does_lex)) newstates = stb__add_if_inactive(m, newstates, m->start_node); // AND epsilon close it newstates = stb__eps_closure(m, newstates); // if it's a goal state, then that's all there is to it if (stb__clear_goalcheck(m, newstates)) { if (m->does_lex) { match_length = str - (stb_uint8 *) str_c; node = stb__get_dfa_node(m,newstates); match_result = node; node = -node + STB__DFA_MGOAL; trans = m->dfa; // could have gotten realloc()ed } else node = STB__DFA_GOAL; } else if (str[-1] == 0 || stb_arr_len(newstates) == 0) { node = STB__DFA_END; } else { node = stb__get_dfa_node(m,newstates); trans = m->dfa; // could have gotten realloc()ed } trans[prevnode].transition[str[-1]] = node; if (node <= STB__DFA_MGOAL) node = -(node - STB__DFA_MGOAL); stb_arr_free(newstates); stb_arr_free(states); } if (node == STB__DFA_GOAL) { return 1; } if (node == STB__DFA_END) { if (m->does_lex) { if (match_result) { if (len) *len = match_length; return m->dfa_result[(int) match_result]; } } return 0; } assert(node != STB__DFA_UNDEF); } } int stb_matcher_find(stb_matcher *m, char *str) { assert(m->does_lex == 0); return stb__matcher_dfa(m, str, NULL); } int stb_lex(stb_matcher *m, char *str, int *len) { assert(m->does_lex); return stb__matcher_dfa(m, str, len); } int stb_regex(char *regex, char *str) { static stb_perfect p; static stb_matcher ** matchers; static char ** regexps; static char ** regexp_cache; static unsigned short *mapping; int z = stb_perfect_hash(&p, (int) regex); if (z >= 0) { if (strcmp(regex, regexp_cache[(int) mapping[z]])) { int i = mapping[z]; stb_matcher_free(matchers[i]); free(regexp_cache[i]); regexps[i] = regex; regexp_cache[i] = strdup(regex); matchers[i] = stb_regex_matcher(regex); } } else { int i,n; if (regex == NULL) { for (i=0; i < stb_arr_len(matchers); ++i) { stb_matcher_free(matchers[i]); free(regexp_cache[i]); } stb_arr_free(matchers); stb_arr_free(regexps); stb_arr_free(regexp_cache); stb_perfect_destroy(&p); free(mapping); mapping = NULL; return -1; } stb_arr_push(regexps, regex); stb_arr_push(regexp_cache, strdup(regex)); stb_arr_push(matchers, stb_regex_matcher(regex)); stb_perfect_destroy(&p); n = stb_perfect_create(&p, (unsigned int *) (char **) regexps, stb_arr_len(regexps)); mapping = (unsigned short *) realloc(mapping, n * sizeof(*mapping)); for (i=0; i < stb_arr_len(regexps); ++i) mapping[stb_perfect_hash(&p, (int) regexps[i])] = i; z = stb_perfect_hash(&p, (int) regex); } return stb_matcher_find(matchers[(int) mapping[z]], str); } #endif // STB_DEFINE #if 0 ////////////////////////////////////////////////////////////////////////////// // // C source-code introspection // // runtime structure typedef struct { char *name; char *type; // base type char *comment; // content of comment field int size; // size of base type int offset; // field offset int arrcount[8]; // array sizes; -1 = pointer indirection; 0 = end of list } stb_info_field; typedef struct { char *structname; int size; int num_fields; stb_info_field *fields; } stb_info_struct; extern stb_info_struct stb_introspect_output[]; // STB_EXTERN void stb_introspect_precompiled(stb_info_struct *compiled); STB_EXTERN void stb__introspect(char *path, char *file); #define stb_introspect_ship() stb__introspect(NULL, NULL, stb__introspect_output) #ifdef STB_SHIP #define stb_introspect() stb_introspect_ship() #define stb_introspect_path(p) stb_introspect_ship() #else // bootstrapping: define stb_introspect() (or 'path') the first time #define stb_introspect() stb__introspect(NULL, __FILE__, NULL) #define stb_introspect_auto() stb__introspect(NULL, __FILE__, stb__introspect_output) #define stb_introspect_path(p) stb__introspect(p, __FILE__, NULL) #define stb_introspect_path(p) stb__introspect(p, __FILE__, NULL) #endif #ifdef STB_DEFINE #ifndef STB_INTROSPECT_CPP #ifdef __cplusplus #define STB_INTROSPECT_CPP 1 #else #define STB_INTROSPECT_CPP 0 #endif #endif void stb_introspect_precompiled(stb_info_struct *compiled) { } static void stb__introspect_filename(char *buffer, char *path) { #if STB_INTROSPECT_CPP sprintf(buffer, "%s/stb_introspect.cpp", path); #else sprintf(buffer, "%s/stb_introspect.c", path); #endif } static void stb__introspect_compute(char *path, char *file) { int i; char ** include_list = NULL; char ** introspect_list = NULL; FILE *f; f = fopen(file, "w"); if (!f) return; fputs("// if you get compiler errors, change the following 0 to a 1:\n", f); fputs("#define STB_INTROSPECT_INVALID 0\n\n", f); fputs("// this will force the code to compile, and force the introspector\n", f); fputs("// to run and then exit, allowing you to recompile\n\n\n", f); fputs("#include \"stb.h\"\n\n",f ); fputs("#if STB_INTROSPECT_INVALID\n", f); fputs(" stb_info_struct stb__introspect_output[] = { (void *) 1 }\n", f); fputs("#else\n\n", f); for (i=0; i < stb_arr_len(include_list); ++i) fprintf(f, " #include \"%s\"\n", include_list[i]); fputs(" stb_info_struct stb__introspect_output[] =\n{\n", f); for (i=0; i < stb_arr_len(introspect_list); ++i) fprintf(f, " stb_introspect_%s,\n", introspect_list[i]); fputs(" };\n", f); fputs("#endif\n", f); fclose(f); } static stb_info_struct *stb__introspect_info; #ifndef STB_SHIP #endif void stb__introspect(char *path, char *file, stb_info_struct *compiled) { static int first=1; if (!first) return; first=0; stb__introspect_info = compiled; #ifndef STB_SHIP if (path || file) { int bail_flag = compiled && compiled[0].structname == (void *) 1; int needs_building = bail_flag; struct stb__stat st; char buffer[1024], buffer2[1024]; if (!path) { stb_splitpath(buffer, file, STB_PATH); path = buffer; } // bail if the source path doesn't exist if (!stb_fexists(path)) return; stb__introspect_filename(buffer2, path); // get source/include files timestamps, compare to output-file timestamp; // if mismatched, regenerate if (stb__stat(buffer2, &st)) needs_building = STB_TRUE; { // find any file that contains an introspection command and is newer // if needs_building is already true, we don't need to do this test, // but we still need these arrays, so go ahead and get them char **all[3]; all[0] = stb_readdir_files_mask(path, "*.h"); all[1] = stb_readdir_files_mask(path, "*.c"); all[2] = stb_readdir_files_mask(path, "*.cpp"); int i,j; if (needs_building) { for (j=0; j < 3; ++j) { for (i=0; i < stb_arr_len(all[j]); ++i) { struct stb__stat st2; if (!stb__stat(all[j][i], &st2)) { if (st.st_mtime < st2.st_mtime) { char *z = stb_filec(all[j][i], NULL); int found=STB_FALSE; while (y) { y = strstr(y, "//si"); if (y && isspace(y[4])) { found = STB_TRUE; break; } } needs_building = STB_TRUE; goto done; } } } } done:; } char *z = stb_filec(all[i], NULL), *y = z; int found=STB_FALSE; while (y) { y = strstr(y, "//si"); if (y && isspace(y[4])) { found = STB_TRUE; break; } } if (found) stb_arr_push(introspect_h, strdup(all[i])); free(z); } } stb_readdir_free(all); if (!needs_building) { for (i=0; i < stb_arr_len(introspect_h); ++i) { struct stb__stat st2; if (!stb__stat(introspect_h[i], &st2)) if (st.st_mtime < st2.st_mtime) needs_building = STB_TRUE; } } if (needs_building) { stb__introspect_compute(path, buffer2); } } } #endif } #endif #endif #ifdef STB_INTROSPECT // compile-time code-generator #define INTROSPECT(x) int main(int argc, char **argv) { stb__introspect(__FILE__); return 0; } #define FILE(x) void stb__introspect(char *filename) { char *file = stb_file(filename, NULL); char *s = file, *t, **p; char *out_name = "stb_introspect.c"; char *out_path; STB_ARR(char) filelist = NULL; int i,n; if (!file) stb_fatal("Couldn't open %s", filename); out_path = stb_splitpathdup(filename, STB_PATH); // search for the macros while (*s) { char buffer[256]; while (*s && !isupper(*s)) ++s; s = stb_strtok_invert(buffer, s, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"); s = stb_skipwhite(s); if (*s == '(') { ++s; t = strchr(s, ')'); if (t == NULL) stb_fatal("Error parsing %s", filename); } } } #endif ////////////////////////////////////////////////////////////////////////////// // // STB-C sliding-window dictionary compression // // This uses a DEFLATE-style sliding window, but no bitwise entropy. // Everything is on byte boundaries, so you could then apply a byte-wise // entropy code, though that's nowhere near as effective. // // An STB-C stream begins with a 16-byte header: // 4 bytes: 0x57 0xBC 0x00 0x00 // 8 bytes: big-endian size of decompressed data, 64-bits // 4 bytes: big-endian size of window (how far back decompressor may need) // // The following symbols appear in the stream (these were determined ad hoc, // not by analysis): // // [dict] 00000100 yyyyyyyy yyyyyyyy yyyyyyyy xxxxxxxx xxxxxxxx // [END] 00000101 11111010 cccccccc cccccccc cccccccc cccccccc // [dict] 00000110 yyyyyyyy yyyyyyyy yyyyyyyy xxxxxxxx // [literals] 00000111 zzzzzzzz zzzzzzzz // [literals] 00001zzz zzzzzzzz // [dict] 00010yyy yyyyyyyy yyyyyyyy xxxxxxxx xxxxxxxx // [dict] 00011yyy yyyyyyyy yyyyyyyy xxxxxxxx // [literals] 001zzzzz // [dict] 01yyyyyy yyyyyyyy xxxxxxxx // [dict] 1xxxxxxx yyyyyyyy // // xxxxxxxx: match length - 1 // yyyyyyyy: backwards distance - 1 // zzzzzzzz: num literals - 1 // cccccccc: adler32 checksum of decompressed data // (all big-endian) STB_EXTERN stb_uint stb_decompress_length(stb_uchar *input); STB_EXTERN stb_uint stb_decompress(stb_uchar *out,stb_uchar *in,stb_uint len); STB_EXTERN stb_uint stb_compress (stb_uchar *out,stb_uchar *in,stb_uint len); STB_EXTERN void stb_compress_window(int z); STB_EXTERN void stb_compress_hashsize(unsigned int z); STB_EXTERN int stb_compress_tofile(char *filename, char *in, stb_uint len); STB_EXTERN int stb_compress_intofile(FILE *f, char *input, stb_uint len); STB_EXTERN char *stb_decompress_fromfile(char *filename, stb_uint *len); STB_EXTERN int stb_compress_stream_start(FILE *f); STB_EXTERN void stb_compress_stream_end(int close); STB_EXTERN void stb_write(char *data, int data_len); #ifdef STB_DEFINE stb_uint stb_decompress_length(stb_uchar *input) { return (input[8] << 24) + (input[9] << 16) + (input[10] << 8) + input[11]; } //////////////////// decompressor /////////////////////// // simple implementation that just writes whole thing into big block static unsigned char *stb__barrier; static unsigned char *stb__barrier2; static unsigned char *stb__barrier3; static unsigned char *stb__barrier4; static stb_uchar *stb__dout; static void stb__match(stb_uchar *data, stb_uint length) { // INVERSE of memmove... write each byte before copying the next... assert (stb__dout + length <= stb__barrier); if (stb__dout + length > stb__barrier) { stb__dout += length; return; } if (data < stb__barrier4) { stb__dout = stb__barrier+1; return; } while (length--) *stb__dout++ = *data++; } static void stb__lit(stb_uchar *data, stb_uint length) { assert (stb__dout + length <= stb__barrier); if (stb__dout + length > stb__barrier) { stb__dout += length; return; } if (data < stb__barrier2) { stb__dout = stb__barrier+1; return; } memcpy(stb__dout, data, length); stb__dout += length; } #define stb__in2(x) ((i[x] << 8) + i[(x)+1]) #define stb__in3(x) ((i[x] << 16) + stb__in2((x)+1)) #define stb__in4(x) ((i[x] << 24) + stb__in3((x)+1)) static stb_uchar *stb_decompress_token(stb_uchar *i) { if (*i >= 0x20) { // use fewer if's for cases that expand small if (*i >= 0x80) stb__match(stb__dout-i[1]-1, i[0] - 0x80 + 1), i += 2; else if (*i >= 0x40) stb__match(stb__dout-(stb__in2(0) - 0x4000 + 1), i[2]+1), i += 3; else /* *i >= 0x20 */ stb__lit(i+1, i[0] - 0x20 + 1), i += 1 + (i[0] - 0x20 + 1); } else { // more ifs for cases that expand large, since overhead is amortized if (*i >= 0x18) stb__match(stb__dout-(stb__in3(0) - 0x180000 + 1), i[3]+1), i += 4; else if (*i >= 0x10) stb__match(stb__dout-(stb__in3(0) - 0x100000 + 1), stb__in2(3)+1), i += 5; else if (*i >= 0x08) stb__lit(i+2, stb__in2(0) - 0x0800 + 1), i += 2 + (stb__in2(0) - 0x0800 + 1); else if (*i == 0x07) stb__lit(i+3, stb__in2(1) + 1), i += 3 + (stb__in2(1) + 1); else if (*i == 0x06) stb__match(stb__dout-(stb__in3(1)+1), i[4]+1), i += 5; else if (*i == 0x04) stb__match(stb__dout-(stb__in3(1)+1), stb__in2(4)+1), i += 6; } return i; } stb_uint stb_decompress(stb_uchar *output, stb_uchar *i, stb_uint length) { stb_uint olen; if (stb__in4(0) != 0x57bC0000) return 0; if (stb__in4(4) != 0) return 0; // error! stream is > 4GB olen = stb_decompress_length(i); stb__barrier2 = i; stb__barrier3 = i+length; stb__barrier = output + olen; stb__barrier4 = output; i += 16; stb__dout = output; while (1) { stb_uchar *old_i = i; i = stb_decompress_token(i); if (i == old_i) { if (*i == 0x05 && i[1] == 0xfa) { assert(stb__dout == output + olen); if (stb__dout != output + olen) return 0; if (stb_adler32(1, output, olen) != (stb_uint) stb__in4(2)) return 0; return olen; } else { assert(0); /* NOTREACHED */ return 0; } } assert(stb__dout <= output + olen); if (stb__dout > output + olen) return 0; } } char *stb_decompress_fromfile(char *filename, unsigned int *len) { unsigned int n; char *q; unsigned char *p; FILE *f = fopen(filename, "rb"); if (f == NULL) return NULL; fseek(f, 0, SEEK_END); n = ftell(f); fseek(f, 0, SEEK_SET); p = (unsigned char * ) malloc(n); if (p == NULL) return NULL; fread(p, 1, n, f); fclose(f); if (p == NULL) return NULL; if (p[0] != 0x57 || p[1] != 0xBc || p[2] || p[3]) { free(p); return NULL; } q = (char *) malloc(stb_decompress_length(p)+1); if (!q) { free(p); return NULL; } *len = stb_decompress((unsigned char *) q, p, n); if (*len) q[*len] = 0; free(p); return q; } #if 0 // streaming decompressor static struct { stb__uchar *in_buffer; stb__uchar *match; stb__uint pending_literals; stb__uint pending_match; } xx; static void stb__match(stb_uchar *data, stb_uint length) { // INVERSE of memmove... write each byte before copying the next... assert (stb__dout + length <= stb__barrier); if (stb__dout + length > stb__barrier) { stb__dout += length; return; } if (data < stb__barrier2) { stb__dout = stb__barrier+1; return; } while (length--) *stb__dout++ = *data++; } static void stb__lit(stb_uchar *data, stb_uint length) { assert (stb__dout + length <= stb__barrier); if (stb__dout + length > stb__barrier) { stb__dout += length; return; } if (data < stb__barrier2) { stb__dout = stb__barrier+1; return; } memcpy(stb__dout, data, length); stb__dout += length; } static void sx_match(stb_uchar *data, stb_uint length) { xx.match = data; xx.pending_match = length; } static void sx_lit(stb_uchar *data, stb_uint length) { xx.pending_lit = length; } static int stb_decompress_token_state(void) { stb__uchar *i = xx.in_buffer; if (*i >= 0x20) { // use fewer if's for cases that expand small if (*i >= 0x80) sx_match(stb__dout-i[1]-1, i[0] - 0x80 + 1), i += 2; else if (*i >= 0x40) sx_match(stb__dout-(stb__in2(0) - 0x4000 + 1), i[2]+1), i += 3; else /* *i >= 0x20 */ sx_lit(i+1, i[0] - 0x20 + 1), i += 1; } else { // more ifs for cases that expand large, since overhead is amortized if (*i >= 0x18) sx_match(stb__dout-(stb__in3(0) - 0x180000 + 1), i[3]+1), i += 4; else if (*i >= 0x10) sx_match(stb__dout-(stb__in3(0) - 0x100000 + 1), stb__in2(3)+1), i += 5; else if (*i >= 0x08) sx_lit(i+2, stb__in2(0) - 0x0800 + 1), i += 2; else if (*i == 0x07) sx_lit(i+3, stb__in2(1) + 1), i += 3; else if (*i == 0x06) sx_match(stb__dout-(stb__in3(1)+1), i[4]+1), i += 5; else if (*i == 0x04) sx_match(stb__dout-(stb__in3(1)+1), stb__in2(4)+1), i += 6; else return 0; } xx.in_buffer = i; return 1; } #endif //////////////////// compressor /////////////////////// static unsigned int stb_matchlen(stb_uchar *m1, stb_uchar *m2, stb_uint maxlen) { stb_uint i; for (i=0; i < maxlen; ++i) if (m1[i] != m2[i]) return i; return i; } // simple implementation that just takes the source data in a big block static stb_uchar *stb__out; static FILE *stb__outfile; static stb_uint stb__outbytes; static void stb__write(unsigned char v) { fputc(v, stb__outfile); ++stb__outbytes; } #define stb_out(v) (stb__out ? *stb__out++ = (stb_uchar) (v) : stb__write((stb_uchar) (v))) static void stb_out2(stb_uint v) { stb_out(v >> 8); stb_out(v); } static void stb_out3(stb_uint v) { stb_out(v >> 16); stb_out(v >> 8); stb_out(v); } static void stb_out4(stb_uint v) { stb_out(v >> 24); stb_out(v >> 16); stb_out(v >> 8 ); stb_out(v); } static void outliterals(stb_uchar *in, int numlit) { while (numlit > 65536) { outliterals(in,65536); in += 65536; numlit -= 65536; } if (numlit == 0) ; else if (numlit <= 32) stb_out (0x000020 + numlit-1); else if (numlit <= 2048) stb_out2(0x000800 + numlit-1); else /* numlit <= 65536) */ stb_out3(0x070000 + numlit-1); if (stb__out) { memcpy(stb__out,in,numlit); stb__out += numlit; } else fwrite(in, 1, numlit, stb__outfile); } static int stb__window = 0x40000; // 256K void stb_compress_window(int z) { if (z >= 0x1000000) z = 0x1000000; // limit of implementation if (z < 0x100) z = 0x100; // insanely small stb__window = z; } static int stb_not_crap(int best, int dist) { return ((best > 2 && dist <= 0x00100) || (best > 5 && dist <= 0x04000) || (best > 7 && dist <= 0x80000)); } static stb_uint stb__hashsize = 32768; void stb_compress_hashsize(unsigned int y) { unsigned int z = 1024; while (z < y) z <<= 1; stb__hashsize = z >> 2; // pass in bytes, store #pointers } // note that you can play with the hashing functions all you // want without needing to change the decompressor #define stb__hc(q,h,c) (((h) << 7) + ((h) >> 25) + q[c]) #define stb__hc2(q,h,c,d) (((h) << 14) + ((h) >> 18) + (q[c] << 7) + q[d]) #define stb__hc3(q,c,d,e) ((q[c] << 14) + (q[d] << 7) + q[e]) static stb_uint32 stb__running_adler; static int stb_compress_chunk(stb_uchar *history, stb_uchar *start, stb_uchar *end, int length, int *pending_literals, stb_uchar **chash, stb_uint mask) { int window = stb__window; stb_uint match_max; stb_uchar *lit_start = start - *pending_literals; stb_uchar *q = start; #define STB__SCRAMBLE(h) (((h) + ((h) >> 16)) & mask) // stop short of the end so we don't scan off the end doing // the hashing; this means we won't compress the last few bytes // unless they were part of something longer while (q < start+length && q+12 < end) { int m; stb_uint h1,h2,h3,h4, h; stb_uchar *t; int best = 2, dist=0; if (q+65536 > end) match_max = end-q; else match_max = 65536; #define stb__nc(b,d) ((d) <= window && ((b) > 9 || stb_not_crap(b,d))) #define STB__TRY(t,p) /* avoid retrying a match we already tried */ \ if (p ? dist != q-t : 1) \ if ((m = stb_matchlen(t, q, match_max)) > best) \ if (stb__nc(m,q-(t))) \ best = m, dist = q - (t) // rather than search for all matches, only try 4 candidate locations, // chosen based on 4 different hash functions of different lengths. // this strategy is inspired by LZO; hashing is unrolled here using the // 'hc' macro h = stb__hc3(q,0, 1, 2); h1 = STB__SCRAMBLE(h); t = chash[h1]; if (t) STB__TRY(t,0); h = stb__hc2(q,h, 3, 4); h2 = STB__SCRAMBLE(h); h = stb__hc2(q,h, 5, 6); t = chash[h2]; if (t) STB__TRY(t,1); h = stb__hc2(q,h, 7, 8); h3 = STB__SCRAMBLE(h); h = stb__hc2(q,h, 9,10); t = chash[h3]; if (t) STB__TRY(t,1); h = stb__hc2(q,h,11,12); h4 = STB__SCRAMBLE(h); t = chash[h4]; if (t) STB__TRY(t,1); // because we use a shared hash table, can only update it // _after_ we've probed all of them chash[h1] = chash[h2] = chash[h3] = chash[h4] = q; if (best > 2) assert(dist > 0); // see if our best match qualifies if (best < 3) { // fast path literals ++q; } else if (best > 2 && best <= 0x80 && dist <= 0x100) { outliterals(lit_start, q-lit_start); lit_start = (q += best); stb_out(0x80 + best-1); stb_out(dist-1); } else if (best > 5 && best <= 0x100 && dist <= 0x4000) { outliterals(lit_start, q-lit_start); lit_start = (q += best); stb_out2(0x4000 + dist-1); stb_out(best-1); } else if (best > 7 && best <= 0x100 && dist <= 0x80000) { outliterals(lit_start, q-lit_start); lit_start = (q += best); stb_out3(0x180000 + dist-1); stb_out(best-1); } else if (best > 8 && best <= 0x10000 && dist <= 0x80000) { outliterals(lit_start, q-lit_start); lit_start = (q += best); stb_out3(0x100000 + dist-1); stb_out2(best-1); } else if (best > 9 && dist <= 0x1000000) { if (best > 65536) best = 65536; outliterals(lit_start, q-lit_start); lit_start = (q += best); if (best <= 0x100) { stb_out(0x06); stb_out3(dist-1); stb_out(best-1); } else { stb_out(0x04); stb_out3(dist-1); stb_out2(best-1); } } else { // fallback literals if no match was a balanced tradeoff ++q; } } // if we didn't get all the way, add the rest to literals if (q-start < length) q = start+length; // the literals are everything from lit_start to q *pending_literals = (q - lit_start); stb__running_adler = stb_adler32(stb__running_adler, start, q - start); return q - start; } static int stb_compress_inner(stb_uchar *input, stb_uint length) { int literals = 0; stb_uint len,i; stb_uchar **chash; chash = (stb_uchar**) malloc(stb__hashsize * sizeof(stb_uchar*)); if (chash == NULL) return 0; // failure for (i=0; i < stb__hashsize; ++i) chash[i] = NULL; // stream signature stb_out(0x57); stb_out(0xbc); stb_out2(0); stb_out4(0); // 64-bit length requires 32-bit leading 0 stb_out4(length); stb_out4(stb__window); stb__running_adler = 1; len = stb_compress_chunk(input, input, input+length, length, &literals, chash, stb__hashsize-1); assert(len == length); outliterals(input+length - literals, literals); free(chash); stb_out2(0x05fa); // end opcode stb_out4(stb__running_adler); return 1; // success } stb_uint stb_compress(stb_uchar *out, stb_uchar *input, stb_uint length) { stb__out = out; stb__outfile = NULL; stb_compress_inner(input, length); return stb__out - out; } int stb_compress_tofile(char *filename, char *input, unsigned int length) { //int maxlen = length + 512 + (length >> 2); // total guess //char *buffer = (char *) malloc(maxlen); //int blen = stb_compress((stb_uchar*)buffer, (stb_uchar*)input, length); stb__out = NULL; stb__outfile = fopen(filename, "wb"); if (!stb__outfile) return 0; stb__outbytes = 0; if (!stb_compress_inner((stb_uchar*)input, length)) return 0; fclose(stb__outfile); return stb__outbytes; } int stb_compress_intofile(FILE *f, char *input, unsigned int length) { //int maxlen = length + 512 + (length >> 2); // total guess //char *buffer = (char*)malloc(maxlen); //int blen = stb_compress((stb_uchar*)buffer, (stb_uchar*)input, length); stb__out = NULL; stb__outfile = f; if (!stb__outfile) return 0; stb__outbytes = 0; if (!stb_compress_inner((stb_uchar*)input, length)) return 0; return stb__outbytes; } ////////////////////// streaming I/O version ///////////////////// static size_t stb_out_backpatch_id(void) { if (stb__out) return (size_t) stb__out; else return ftell(stb__outfile); } static void stb_out_backpatch(size_t id, stb_uint value) { stb_uchar data[4] = { value >> 24, value >> 16, value >> 8, value }; if (stb__out) { memcpy((void *) id, data, 4); } else { stb_uint where = ftell(stb__outfile); fseek(stb__outfile, id, SEEK_SET); fwrite(data, 4, 1, stb__outfile); fseek(stb__outfile, where, SEEK_SET); } } // ok, the wraparound buffer was a total failure. let's instead // use a copying-in-place buffer, which lets us share the code. // This is way less efficient but it'll do for now. static struct { stb_uchar *buffer; int size; // physical size of buffer in bytes int valid; // amount of valid data in bytes int start; // bytes of data already output int window; int fsize; int pending_literals; // bytes not-quite output but counted in start int length_id; stb_uint total_bytes; stb_uchar **chash; stb_uint hashmask; } xtb; static int stb_compress_streaming_start(void) { stb_uint i; xtb.size = stb__window * 3; xtb.buffer = (stb_uchar*)malloc(xtb.size); if (!xtb.buffer) return 0; xtb.chash = (stb_uchar**)malloc(sizeof(*xtb.chash) * stb__hashsize); if (!xtb.chash) { free(xtb.buffer); return 0; } for (i=0; i < stb__hashsize; ++i) xtb.chash[i] = NULL; xtb.hashmask = stb__hashsize-1; xtb.valid = 0; xtb.start = 0; xtb.window = stb__window; xtb.fsize = stb__window; xtb.pending_literals = 0; xtb.total_bytes = 0; // stream signature stb_out(0x57); stb_out(0xbc); stb_out2(0); stb_out4(0); // 64-bit length requires 32-bit leading 0 xtb.length_id = stb_out_backpatch_id(); stb_out4(0); // we don't know the output length yet stb_out4(stb__window); stb__running_adler = 1; return 1; } static int stb_compress_streaming_end(void) { // flush out any remaining data stb_compress_chunk(xtb.buffer, xtb.buffer+xtb.start, xtb.buffer+xtb.valid, xtb.valid-xtb.start, &xtb.pending_literals, xtb.chash, xtb.hashmask); // write out pending literals outliterals(xtb.buffer + xtb.valid - xtb.pending_literals, xtb.pending_literals); stb_out2(0x05fa); // end opcode stb_out4(stb__running_adler); stb_out_backpatch(xtb.length_id, xtb.total_bytes); free(xtb.buffer); free(xtb.chash); return 1; } void stb_write(char *data, int data_len) { stb_uint i; // @TODO: fast path for filling the buffer and doing nothing else // if (xtb.valid + data_len < xtb.size) xtb.total_bytes += data_len; while (data_len) { // fill buffer if (xtb.valid < xtb.size) { int amt = xtb.size - xtb.valid; if (data_len < amt) amt = data_len; memcpy(xtb.buffer + xtb.valid, data, amt); data_len -= amt; data += amt; xtb.valid += amt; } if (xtb.valid < xtb.size) return; // at this point, the buffer is full // if we can process some data, go for it; make sure // we leave an 'fsize's worth of data, though if (xtb.start + xtb.fsize < xtb.valid) { int amount = (xtb.valid - xtb.fsize) - xtb.start; int n; assert(amount > 0); n = stb_compress_chunk(xtb.buffer, xtb.buffer + xtb.start, xtb.buffer + xtb.valid, amount, &xtb.pending_literals, xtb.chash, xtb.hashmask); xtb.start += n; } assert(xtb.start + xtb.fsize >= xtb.valid); // at this point, our future size is too small, so we // need to flush some history. we, in fact, flush exactly // one window's worth of history { int flush = xtb.window; assert(xtb.start >= flush); assert(xtb.valid >= flush); // if 'pending literals' extends back into the shift region, // write them out if (xtb.start - xtb.pending_literals < flush) { outliterals(xtb.buffer + xtb.start - xtb.pending_literals, xtb.pending_literals); xtb.pending_literals = 0; } // now shift the window memmove(xtb.buffer, xtb.buffer + flush, xtb.valid - flush); xtb.start -= flush; xtb.valid -= flush; for (i=0; i <= xtb.hashmask; ++i) if (xtb.chash[i] < xtb.buffer + flush) xtb.chash[i] = NULL; else xtb.chash[i] -= flush; } // and now that we've made room for more data, go back to the top } } int stb_compress_stream_start(FILE *f) { stb__out = NULL; stb__outfile = f; if (f == NULL) return 0; if (!stb_compress_streaming_start()) return 0; return 1; } void stb_compress_stream_end(int close) { stb_compress_streaming_end(); if (close && stb__outfile) { fclose(stb__outfile); } } #endif // STB_DEFINE ////////////////////////////////////////////////////////////////////////////// // // File abstraction... tired of not having this... we can write // compressors to be layers over these that auto-close their children. typedef struct stbfile { int (*getbyte)(struct stbfile *); // -1 on EOF unsigned int (*getdata)(struct stbfile *, void *block, unsigned int len); int (*putbyte)(struct stbfile *, int byte); unsigned int (*putdata)(struct stbfile *, void *block, unsigned int len); unsigned int (*size)(struct stbfile *); unsigned int (*tell)(struct stbfile *); void (*backpatch)(struct stbfile *, unsigned int tell, void *block, unsigned int len); void (*close)(struct stbfile *); FILE *f; // file to fread/fwrite unsigned char *buffer; // input/output buffer unsigned char *indata, *inend; // input buffer union { int various; void *ptr; }; } stbfile; STB_EXTERN unsigned int stb_getc(stbfile *f); // read STB_EXTERN int stb_putc(stbfile *f, int ch); // write STB_EXTERN unsigned int stb_getdata(stbfile *f, void *buffer, unsigned int len); // read STB_EXTERN unsigned int stb_putdata(stbfile *f, void *buffer, unsigned int len); // write STB_EXTERN unsigned int stb_tell(stbfile *f); // read STB_EXTERN unsigned int stb_size(stbfile *f); // read/write STB_EXTERN void stb_backpatch(stbfile *f, unsigned int tell, void *buffer, unsigned int len); // write #ifdef STB_DEFINE unsigned int stb_getc(stbfile *f) { return f->getbyte(f); } int stb_putc(stbfile *f, int ch) { return f->putbyte(f, ch); } unsigned int stb_getdata(stbfile *f, void *buffer, unsigned int len) { return f->getdata(f, buffer, len); } unsigned int stb_putdata(stbfile *f, void *buffer, unsigned int len) { return f->putdata(f, buffer, len); } void stb_close(stbfile *f) { f->close(f); free(f); } unsigned int stb_tell(stbfile *f) { return f->tell(f); } unsigned int stb_size(stbfile *f) { return f->size(f); } void stb_backpatch(stbfile *f, unsigned int tell, void *buffer, unsigned int len) { f->backpatch(f,tell,buffer,len); } // FILE * implementation static int stb__fgetbyte(stbfile *f) { return fgetc(f->f); } static int stb__fputbyte(stbfile *f, int ch) { return fputc(ch, f->f)==0; } static unsigned int stb__fgetdata(stbfile *f, void *buffer, unsigned int len) { return fread(buffer,1,len,f->f); } static unsigned int stb__fputdata(stbfile *f, void *buffer, unsigned int len) { return fwrite(buffer,1,len,f->f); } static unsigned int stb__fsize(stbfile *f) { return stb_filelen(f->f); } static unsigned int stb__ftell(stbfile *f) { return ftell(f->f); } static void stb__fbackpatch(stbfile *f, unsigned int where, void *buffer, unsigned int len) { fseek(f->f, where, SEEK_SET); fwrite(buffer, 1, len, f->f); fseek(f->f, 0, SEEK_END); } static void stb__fclose(stbfile *f) { fclose(f->f); } stbfile *stb_openf(FILE *f) { stbfile m = { stb__fgetbyte, stb__fgetdata, stb__fputbyte, stb__fputdata, stb__fsize, stb__ftell, stb__fbackpatch, stb__fclose, 0,0,0, }; stbfile *z = (stbfile *) malloc(sizeof(*z)); if (z) { *z = m; z->f = f; } return z; } static int stb__nogetbyte(stbfile *f) { assert(0); return -1; } static unsigned int stb__nogetdata(stbfile *f, void *buffer, unsigned int len) { assert(0); return 0; } static int stb__noputbyte(stbfile *f, int ch) { assert(0); return 0; } static unsigned int stb__noputdata(stbfile *f, void *buffer, unsigned int len) { assert(0); return 0; } static void stb__nobackpatch(stbfile *f, unsigned int where, void *buffer, unsigned int len) { assert(0); } static int stb__bgetbyte(stbfile *s) { if (s->indata < s->inend) return *s->indata++; else return -1; } static unsigned int stb__bgetdata(stbfile *s, void *buffer, unsigned int len) { if (s->indata + len > s->inend) len = s->inend - s->indata; memcpy(buffer, s->indata, len); s->indata += len; return len; } static unsigned int stb__bsize(stbfile *s) { return s->inend - s->buffer; } static unsigned int stb__btell(stbfile *s) { return s->indata - s->buffer; } static void stb__bclose(stbfile *s) { if (s->various) free(s->buffer); } stbfile *stb_open_inbuffer(void *buffer, unsigned int len) { stbfile m = { stb__bgetbyte, stb__bgetdata, stb__noputbyte, stb__noputdata, stb__bsize, stb__btell, stb__nobackpatch, stb__bclose }; stbfile *z = (stbfile *) malloc(sizeof(*z)); if (z) { *z = m; z->buffer = (unsigned char *) buffer; z->indata = z->buffer; z->inend = z->indata + len; } return z; } stbfile *stb_open_inbuffer_free(void *buffer, unsigned int len) { stbfile *z = stb_open_inbuffer(buffer, len); if (z) z->various = 1; // free return z; } #ifndef STB_VERSION // if we've been cut-and-pasted elsewhere, you get a limited // version of stb_open, without the 'k' flag and utf8 support static void stb__fclose2(stbfile *f) { fclose(f->f); } stbfile *stb_open(char *filename, char *mode) { FILE *f = fopen(filename, mode); stbfile *s; if (f == NULL) return NULL; s = stb_openf(f); if (s) s->close = stb__fclose2; return s; } #else // the full version depends on some code in stb.h; this // also includes the memory buffer output format implemented with stb_arr static void stb__fclose2(stbfile *f) { stb_fclose(f->f, f->various); } stbfile *stb_open(char *filename, char *mode) { FILE *f = stb_fopen(filename, mode[0] == 'k' ? mode+1 : mode); stbfile *s; if (f == NULL) return NULL; s = stb_openf(f); if (s) { s->close = stb__fclose2; s->various = mode[0] == 'k' ? stb_keep_if_different : stb_keep_yes; } return s; } static int stb__aputbyte(stbfile *f, int ch) { stb_arr_push(f->buffer, ch); return 1; } static unsigned int stb__aputdata(stbfile *f, void *data, unsigned int len) { memcpy(stb_arr_addn(f->buffer, (int) len), data, len); return len; } static unsigned int stb__asize(stbfile *f) { return stb_arr_len(f->buffer); } static void stb__abackpatch(stbfile *f, unsigned int where, void *data, unsigned int len) { memcpy(f->buffer+where, data, len); } static void stb__aclose(stbfile *f) { *(unsigned char **) f->ptr = f->buffer; } stbfile *stb_open_outbuffer(unsigned char **update_on_close) { stbfile m = { stb__nogetbyte, stb__nogetdata, stb__aputbyte, stb__aputdata, stb__asize, stb__asize, stb__abackpatch, stb__aclose }; stbfile *z = (stbfile *) malloc(sizeof(*z)); if (z) { z->ptr = update_on_close; *z = m; } return z; } #endif #endif ////////////////////////////////////////////////////////////////////////////// // // Arithmetic coder... based on cbloom's notes on the subject, should be // less code than a huffman code. typedef struct { unsigned int range_low; unsigned int range_high; unsigned int code, range; // decode int buffered_u8; int pending_ffs; stbfile *output; } stb_arith; STB_EXTERN void stb_arith_init_encode(stb_arith *a, stbfile *out); STB_EXTERN void stb_arith_init_decode(stb_arith *a, stbfile *in); STB_EXTERN stbfile *stb_arith_encode_close(stb_arith *a); STB_EXTERN stbfile *stb_arith_decode_close(stb_arith *a); STB_EXTERN void stb_arith_encode(stb_arith *a, unsigned int totalfreq, unsigned int freq, unsigned int cumfreq); STB_EXTERN void stb_arith_encode_log2(stb_arith *a, unsigned int totalfreq2, unsigned int freq, unsigned int cumfreq); STB_EXTERN unsigned int stb_arith_decode_value(stb_arith *a, unsigned int totalfreq); STB_EXTERN void stb_arith_decode_advance(stb_arith *a, unsigned int totalfreq, unsigned int freq, unsigned int cumfreq); STB_EXTERN unsigned int stb_arith_decode_value_log2(stb_arith *a, unsigned int totalfreq2); STB_EXTERN void stb_arith_decode_advance_log2(stb_arith *a, unsigned int totalfreq2, unsigned int freq, unsigned int cumfreq); STB_EXTERN void stb_arith_encode_byte(stb_arith *a, int byte); STB_EXTERN int stb_arith_decode_byte(stb_arith *a); // this is a memory-inefficient way of doing things, but it's // fast(?) and simple typedef struct { unsigned short cumfreq; unsigned short samples; } stb_arith_symstate_item; typedef struct { int num_sym; unsigned int pow2; int countdown; stb_arith_symstate_item data[1]; } stb_arith_symstate; #ifdef STB_DEFINE void stb_arith_init_encode(stb_arith *a, stbfile *out) { a->range_low = 0; a->range_high = 0xffffffff; a->pending_ffs = -1; // means no buffered character currently, to speed up normal case a->output = out; } static void stb__arith_carry(stb_arith *a) { int i; assert(a->pending_ffs != -1); // can't carry with no data stb_putc(a->output, a->buffered_u8); for (i=0; i < a->pending_ffs; ++i) stb_putc(a->output, 0); } static void stb__arith_putbyte(stb_arith *a, int byte) { if (a->pending_ffs) { if (a->pending_ffs == -1) { // means no buffered data; encoded for fast path efficiency if (byte == 0xff) stb_putc(a->output, byte); // just write it immediately else { a->buffered_u8 = byte; a->pending_ffs = 0; } } else if (byte == 0xff) { ++a->pending_ffs; } else { int i; stb_putc(a->output, a->buffered_u8); for (i=0; i < a->pending_ffs; ++i) stb_putc(a->output, 0xff); } } else if (byte == 0xff) { ++a->pending_ffs; } else { // fast path stb_putc(a->output, a->buffered_u8); a->buffered_u8 = byte; } } static void stb__arith_flush(stb_arith *a) { if (a->pending_ffs >= 0) { int i; stb_putc(a->output, a->buffered_u8); for (i=0; i < a->pending_ffs; ++i) stb_putc(a->output, 0xff); } } static void stb__renorm_encoder(stb_arith *a) { stb__arith_putbyte(a, a->range_low >> 24); a->range_low <<= 8; a->range_high = (a->range_high << 8) | 0xff; } static void stb__renorm_decoder(stb_arith *a) { int c = stb_getc(a->output); a->code = (a->code << 8) + (c >= 0 ? c : 0); // if EOF, insert 0 } void stb_arith_encode(stb_arith *a, unsigned int totalfreq, unsigned int freq, unsigned int cumfreq) { unsigned int range = a->range_high - a->range_low; unsigned int old = a->range_low; range /= totalfreq; a->range_low += range * cumfreq; a->range_high = a->range_low + range*freq; if (a->range_low < old) stb__arith_carry(a); while (a->range_high - a->range_low < 0x1000000) stb__renorm_encoder(a); } void stb_arith_encode_log2(stb_arith *a, unsigned int totalfreq2, unsigned int freq, unsigned int cumfreq) { unsigned int range = a->range_high - a->range_low; unsigned int old = a->range_low; range >>= totalfreq2; a->range_low += range * cumfreq; a->range_high = a->range_low + range*freq; if (a->range_low < old) stb__arith_carry(a); while (a->range_high - a->range_low < 0x1000000) stb__renorm_encoder(a); } unsigned int stb_arith_decode_value(stb_arith *a, unsigned int totalfreq) { unsigned int freqsize = a->range / totalfreq; unsigned int z = a->code / freqsize; return z >= totalfreq ? totalfreq-1 : z; } void stb_arith_decode_advance(stb_arith *a, unsigned int totalfreq, unsigned int freq, unsigned int cumfreq) { unsigned int freqsize = a->range / totalfreq; // @OPTIMIZE, share with above divide somehow? a->code -= freqsize * cumfreq; a->range = freqsize * freq; while (a->range < 0x1000000) stb__renorm_decoder(a); } unsigned int stb_arith_decode_value_log2(stb_arith *a, unsigned int totalfreq2) { unsigned int freqsize = a->range >> totalfreq2; unsigned int z = a->code / freqsize; return z >= (1U<range >> totalfreq2; a->code -= freqsize * cumfreq; a->range = freqsize * freq; while (a->range < 0x1000000) stb__renorm_decoder(a); } stbfile *stb_arith_encode_close(stb_arith *a) { // put exactly as many bytes as we'll read, so we can turn on/off arithmetic coding in a stream stb__arith_putbyte(a, a->range_low >> 24); stb__arith_putbyte(a, a->range_low >> 16); stb__arith_putbyte(a, a->range_low >> 8); stb__arith_putbyte(a, a->range_low >> 0); stb__arith_flush(a); return a->output; } stbfile *stb_arith_decode_close(stb_arith *a) { return a->output; } // this is a simple power-of-two based model -- using // power of two means we need one divide per decode, // not two. #define POW2_LIMIT 12 stb_arith_symstate *stb_arith_state_create(int num_sym) { stb_arith_symstate *s = (stb_arith_symstate *) malloc(sizeof(*s) + (num_sym-1) * sizeof(s->data[0])); if (s) { int i, cf, cf_next, next; int start_freq, extra; s->num_sym = num_sym; s->pow2 = 4; while (s->pow2 < 15 && (1 << s->pow2) < 3*num_sym) { ++s->pow2; } start_freq = (1 << s->pow2) / num_sym; assert(start_freq >= 1); extra = (1 << s->pow2) % num_sym; // now set up the initial stats if (s->pow2 < POW2_LIMIT) next = 0; else next = 1; cf = cf_next = 0; for (i=0; i < extra; ++i) { s->data[i].cumfreq = cf; s->data[i].samples = next; cf += start_freq+1; cf_next += next; } for (; i < num_sym; ++i) { s->data[i].cumfreq = cf; s->data[i].samples = next; cf += start_freq; cf_next += next; } assert(cf == (1 << s->pow2)); // now, how long should we go until we have 2 << s->pow2 samples? s->countdown = (2 << s->pow2) - cf - cf_next; } return s; } static void stb_arith_state_rescale(stb_arith_symstate *s) { if (s->pow2 < POW2_LIMIT) { int pcf, cf, cf_next, next, i; ++s->pow2; if (s->pow2 < POW2_LIMIT) next = 0; else next = 1; cf = cf_next = 0; pcf = 0; for (i=0; i < s->num_sym; ++i) { int sample = s->data[i].cumfreq - pcf + s->data[i].samples; s->data[i].cumfreq = cf; cf += sample; s->data[i].samples = next; cf_next += next; } assert(cf == (1 << s->pow2)); s->countdown = (2 << s->pow2) - cf - cf_next; } else { int pcf, cf, cf_next, i; cf = cf_next = 0; pcf = 0; for (i=0; i < s->num_sym; ++i) { int sample = (s->data[i].cumfreq - pcf + s->data[i].samples) >> 1; s->data[i].cumfreq = cf; cf += sample; s->data[i].samples = 1; cf_next += 1; } assert(cf == (1 << s->pow2)); // this isn't necessarily true, due to rounding down! s->countdown = (2 << s->pow2) - cf - cf_next; } } void stb_arith_encode_byte(stb_arith *a, int byte) { } int stb_arith_decode_byte(stb_arith *a) { return -1; } #endif ////////////////////////////////////////////////////////////////////////////// // // Threads // #ifndef _WIN32 #ifdef STB_THREADS #error "threads not implemented except for Windows" #endif #endif // call this function to free any global variables for memory testing STB_EXTERN void stb_thread_cleanup(void); typedef void * (*stb_thread_func)(void *); // do not rely on these types, this is an implementation detail. // compare against STB_THREAD_NULL and ST_SEMAPHORE_NULL typedef void *stb_thread; typedef void *stb_semaphore; typedef void *stb_mutex; typedef struct stb__sync *stb_sync; #define STB_SEMAPHORE_NULL NULL #define STB_THREAD_NULL NULL #define STB_MUTEX_NULL NULL #define STB_SYNC_NULL NULL // get the number of processors (limited to those in the affinity mask for this process). STB_EXTERN int stb_processor_count(void); // force to run on a single core -- needed for RDTSC to work, e.g. for iprof STB_EXTERN void stb_force_uniprocessor(void); // stb_work functions: queue up work to be done by some worker threads // set number of threads to serve the queue; you can change this on the fly, // but if you decrease it, it won't decrease until things currently on the // queue are finished STB_EXTERN void stb_work_numthreads(int n); // set maximum number of units in the queue; you can only set this BEFORE running any work functions STB_EXTERN int stb_work_maxunits(int n); // enqueue some work to be done (can do this from any thread, or even from a piece of work); // return value of f is stored in *return_code if non-NULL STB_EXTERN int stb_work(stb_thread_func f, void *d, volatile void **return_code); // as above, but stb_sync_reach is called on 'rel' after work is complete STB_EXTERN int stb_work_reach(stb_thread_func f, void *d, volatile void **return_code, stb_sync rel); // necessary to call this when using volatile to order writes/reads STB_EXTERN void stb_barrier(void); // support for independent queues with their own threads typedef struct stb__workqueue stb_workqueue; STB_EXTERN stb_workqueue*stb_workq_new(int numthreads, int max_units); STB_EXTERN stb_workqueue*stb_workq_new_flags(int numthreads, int max_units, int no_add_mutex, int no_remove_mutex); STB_EXTERN void stb_workq_delete(stb_workqueue *q); STB_EXTERN void stb_workq_numthreads(stb_workqueue *q, int n); STB_EXTERN int stb_workq(stb_workqueue *q, stb_thread_func f, void *d, volatile void **return_code); STB_EXTERN int stb_workq_reach(stb_workqueue *q, stb_thread_func f, void *d, volatile void **return_code, stb_sync rel); STB_EXTERN int stb_workq_length(stb_workqueue *q); STB_EXTERN stb_thread stb_create_thread (stb_thread_func f, void *d); STB_EXTERN stb_thread stb_create_thread2(stb_thread_func f, void *d, volatile void **return_code, stb_semaphore rel); STB_EXTERN void stb_destroy_thread(stb_thread t); STB_EXTERN stb_semaphore stb_sem_new(int max_val); STB_EXTERN stb_semaphore stb_sem_new_extra(int max_val, int start_val); STB_EXTERN void stb_sem_delete (stb_semaphore s); STB_EXTERN void stb_sem_waitfor(stb_semaphore s); STB_EXTERN void stb_sem_release(stb_semaphore s); STB_EXTERN stb_mutex stb_mutex_new(void); STB_EXTERN void stb_mutex_delete(stb_mutex m); STB_EXTERN void stb_mutex_begin(stb_mutex m); STB_EXTERN void stb_mutex_end(stb_mutex m); STB_EXTERN stb_sync stb_sync_new(void); STB_EXTERN void stb_sync_delete(stb_sync s); STB_EXTERN int stb_sync_set_target(stb_sync s, int count); STB_EXTERN void stb_sync_reach_and_wait(stb_sync s); // wait for 'target' reachers STB_EXTERN int stb_sync_reach(stb_sync s); typedef struct stb__threadqueue stb_threadqueue; #define STB_THREADQ_DYNAMIC 0 STB_EXTERN stb_threadqueue *stb_threadq_new(int item_size, int num_items, int many_add, int many_remove); STB_EXTERN void stb_threadq_delete(stb_threadqueue *tq); STB_EXTERN int stb_threadq_get(stb_threadqueue *tq, void *output); STB_EXTERN void stb_threadq_get_block(stb_threadqueue *tq, void *output); STB_EXTERN int stb_threadq_add(stb_threadqueue *tq, void *input); // can return FALSE if STB_THREADQ_DYNAMIC and attempt to grow fails STB_EXTERN int stb_threadq_add_block(stb_threadqueue *tq, void *input); #ifdef STB_THREADS #ifdef STB_DEFINE typedef struct { stb_thread_func f; void *d; volatile void **return_val; stb_semaphore sem; } stb__thread; // this is initialized along all possible paths to create threads, therefore // it's always initialized before any other threads are create, therefore // it's free of races AS LONG AS you only create threads through stb_* static stb_mutex stb__threadmutex, stb__workmutex; static void stb__threadmutex_init(void) { if (stb__threadmutex == STB_SEMAPHORE_NULL) { stb__threadmutex = stb_mutex_new(); stb__workmutex = stb_mutex_new(); } } #ifdef STB_THREAD_TEST volatile float stb__t1=1, stb__t2; static void stb__wait(int n) { float z = 0; int i; for (i=0; i < n; ++i) z += 1 / (stb__t1+i); stb__t2 = z; } #else #define stb__wait(x) #endif #ifdef _WIN32 // avoid including windows.h -- note that our definitions aren't // exactly the same (we don't define the security descriptor struct) // so if you want to include windows.h, make sure you do it first. #include #ifndef _WINDOWS_ // check windows.h guard #define STB__IMPORT STB_EXTERN __declspec(dllimport) #define STB__DW unsigned long STB__IMPORT int __stdcall TerminateThread(void *, STB__DW); STB__IMPORT void * __stdcall CreateSemaphoreA(void *sec, long,long,char*); STB__IMPORT int __stdcall CloseHandle(void *); STB__IMPORT STB__DW __stdcall WaitForSingleObject(void *, STB__DW); STB__IMPORT int __stdcall ReleaseSemaphore(void *, long, long *); STB__IMPORT void __stdcall Sleep(STB__DW); #endif // necessary to call this when using volatile to order writes/reads void stb_barrier(void) { #ifdef MemoryBarrier MemoryBarrier(); #else long temp; __asm xchg temp,eax; #endif } static void stb__thread_run(void *t) { void *res; stb__thread info = * (stb__thread *) t; free(t); res = info.f(info.d); if (info.return_val) *info.return_val = res; if (info.sem != STB_SEMAPHORE_NULL) stb_sem_release(info.sem); } static stb_thread stb_create_thread_raw(stb_thread_func f, void *d, volatile void **return_code, stb_semaphore rel) { #ifdef _MT #if defined(STB_FASTMALLOC) && !defined(STB_FASTMALLOC_ITS_OKAY_I_ONLY_MALLOC_IN_ONE_THREAD) stb_fatal("Error! Cannot use STB_FASTMALLOC with threads.\n"); return STB_THREAD_NULL; #else unsigned long id; stb__thread *data = (stb__thread *) malloc(sizeof(*data)); if (!data) return NULL; stb__threadmutex_init(); data->f = f; data->d = d; data->return_val = return_code; data->sem = rel; id = _beginthread(stb__thread_run, 0, data); if (id == -1) return NULL; return (void *) id; #endif #else #ifdef STB_NO_STB_STRINGS stb_fatal("Invalid compilation"); #else stb_fatal("Must compile mult-threaded to use stb_thread/stb_work."); #endif return NULL; #endif } // trivial win32 wrappers void stb_destroy_thread(stb_thread t) { TerminateThread(t,0); } stb_semaphore stb_sem_new(int maxv) {return CreateSemaphoreA(NULL,0,maxv,NULL); } stb_semaphore stb_sem_new_extra(int maxv,int start){return CreateSemaphoreA(NULL,start,maxv,NULL); } void stb_sem_delete(stb_semaphore s) { if (s != NULL) CloseHandle(s); } void stb_sem_waitfor(stb_semaphore s) { WaitForSingleObject(s, 0xffffffff); } // INFINITE void stb_sem_release(stb_semaphore s) { ReleaseSemaphore(s,1,NULL); } static void stb__thread_sleep(int ms) { Sleep(ms); } #ifndef _WINDOWS_ STB__IMPORT int __stdcall GetProcessAffinityMask(void *, STB__DW *, STB__DW *); STB__IMPORT void * __stdcall GetCurrentProcess(void); STB__IMPORT int __stdcall SetProcessAffinityMask(void *, STB__DW); #endif int stb_processor_count(void) { unsigned long proc,sys; GetProcessAffinityMask(GetCurrentProcess(), &proc, &sys); return stb_bitcount(proc); } void stb_force_uniprocessor(void) { unsigned long proc,sys; GetProcessAffinityMask(GetCurrentProcess(), &proc, &sys); if (stb_bitcount(proc) > 1) { int z; for (z=0; z < 32; ++z) if (proc & (1 << z)) break; if (z < 32) { proc = 1 << z; SetProcessAffinityMask(GetCurrentProcess(), proc); } } } #ifdef _WINDOWS_ #define STB_MUTEX_NATIVE void *stb_mutex_new(void) { CRITICAL_SECTION *p = (CRITICAL_SECTION *) malloc(sizeof(*p)); if (p) #if _WIN32_WINNT >= 0x0500 InitializeCriticalSectionAndSpinCount(p, 500); #else InitializeCriticalSection(p); #endif return p; } void stb_mutex_delete(void *p) { if (p) { DeleteCriticalSection((CRITICAL_SECTION *) p); free(p); } } void stb_mutex_begin(void *p) { stb__wait(500); if (p) EnterCriticalSection((CRITICAL_SECTION *) p); } void stb_mutex_end(void *p) { if (p) LeaveCriticalSection((CRITICAL_SECTION *) p); stb__wait(500); } #endif // _WINDOWS_ #if 0 // for future reference, // InterlockedCompareExchange for x86: int cas64_mp(void * dest, void * xcmp, void * xxchg) { __asm { mov esi, [xxchg] ; exchange mov ebx, [esi + 0] mov ecx, [esi + 4] mov esi, [xcmp] ; comparand mov eax, [esi + 0] mov edx, [esi + 4] mov edi, [dest] ; destination lock cmpxchg8b [edi] jz yyyy; mov [esi + 0], eax; mov [esi + 4], edx; yyyy: xor eax, eax; setz al; }; inline unsigned __int64 _InterlockedCompareExchange64(volatile unsigned __int64 *dest ,unsigned __int64 exchange ,unsigned __int64 comperand) { //value returned in eax::edx __asm { lea esi,comperand; lea edi,exchange; mov eax,[esi]; mov edx,4[esi]; mov ebx,[edi]; mov ecx,4[edi]; mov esi,dest; lock CMPXCHG8B [esi]; } #endif // #if 0 #endif // _WIN32 stb_thread stb_create_thread2(stb_thread_func f, void *d, volatile void **return_code, stb_semaphore rel) { return stb_create_thread_raw(f,d,return_code,rel); } stb_thread stb_create_thread(stb_thread_func f, void *d) { return stb_create_thread2(f,d,NULL,STB_SEMAPHORE_NULL); } // mutex implemented by wrapping semaphore #ifndef STB_MUTEX_NATIVE stb_mutex stb_mutex_new(void) { return stb_sem_new_extra(1,1); } void stb_mutex_delete(stb_mutex m) { stb_sem_delete (m); } void stb_mutex_begin(stb_mutex m) { stb__wait(500); if (m) stb_sem_waitfor(m); } void stb_mutex_end(stb_mutex m) { if (m) stb_sem_release(m); stb__wait(500); } #endif // thread merge operation struct stb__sync { int target; // target number of threads to hit it int sofar; // total threads that hit it int waiting; // total threads waiting stb_mutex start; // mutex to prevent starting again before finishing previous stb_mutex mutex; // mutex while tweaking state stb_semaphore release; // semaphore wake up waiting threads // we have to wake them up one at a time, rather than using a single release // call, because win32 semaphores don't let you dynamically change the max count! }; stb_sync stb_sync_new(void) { stb_sync s = (stb_sync) malloc(sizeof(*s)); if (!s) return s; s->target = s->sofar = s->waiting = 0; s->mutex = stb_mutex_new(); s->start = stb_mutex_new(); s->release = stb_sem_new(1); if (s->mutex == STB_MUTEX_NULL || s->release == STB_SEMAPHORE_NULL || s->start == STB_MUTEX_NULL) { stb_mutex_delete(s->mutex); stb_mutex_delete(s->mutex); stb_sem_delete(s->release); free(s); return NULL; } return s; } void stb_sync_delete(stb_sync s) { if (s->waiting) { // it's bad to delete while there are threads waiting! // shall we wait for them to reach, or just bail? just bail assert(0); } stb_mutex_delete(s->mutex); stb_mutex_delete(s->release); free(s); } int stb_sync_set_target(stb_sync s, int count) { // don't allow setting a target until the last one is fully released; // note that this can lead to inefficient pipelining, and maybe we'd // be better off ping-ponging between two internal syncs? // I tried seeing how often this happened using TryEnterCriticalSection // and could _never_ get it to happen in imv(stb), even with more threads // than processors. So who knows! stb_mutex_begin(s->start); // this mutex is pointless, since it's not valid for threads // to call reach() before anyone calls set_target() anyway stb_mutex_begin(s->mutex); assert(s->target == 0); // enforced by start mutex s->target = count; s->sofar = 0; s->waiting = 0; stb_mutex_end(s->mutex); return STB_TRUE; } void stb__sync_release(stb_sync s) { if (s->waiting) stb_sem_release(s->release); else { s->target = 0; stb_mutex_end(s->start); } } int stb_sync_reach(stb_sync s) { int n; stb_mutex_begin(s->mutex); assert(s->sofar < s->target); n = ++s->sofar; // record this value to avoid possible race if we did 'return s->sofar'; if (s->sofar == s->target) stb__sync_release(s); stb_mutex_end(s->mutex); return n; } void stb_sync_reach_and_wait(stb_sync s) { stb_mutex_begin(s->mutex); assert(s->sofar < s->target); ++s->sofar; if (s->sofar == s->target) { stb__sync_release(s); stb_mutex_end(s->mutex); } else { ++s->waiting; // we're waiting, so one more waiter stb_mutex_end(s->mutex); // release the mutex to other threads stb_sem_waitfor(s->release); // wait for merge completion stb_mutex_begin(s->mutex); // on merge completion, grab the mutex --s->waiting; // we're done waiting stb__sync_release(s); // restart the next waiter stb_mutex_end(s->mutex); // and now we're done // this ends the same as the first case, but it's a lot // clearer to understand without sharing the code } } struct stb__threadqueue { stb_mutex add, remove; stb_semaphore nonempty, nonfull; int head_blockers; // number of threads blocking--used to know whether to release(avail) int tail_blockers; int head, tail, array_size, growable; int item_size; char *data; }; static int stb__tq_wrap(volatile stb_threadqueue *z, int p) { if (p == z->array_size) return p - z->array_size; else return p; } int stb__threadq_get_raw(stb_threadqueue *tq2, void *output, int block) { volatile stb_threadqueue *tq = (volatile stb_threadqueue *) tq2; if (tq->head == tq->tail && !block) return 0; stb_mutex_begin(tq->remove); while (tq->head == tq->tail) { if (!block) { stb_mutex_end(tq->remove); return 0; } ++tq->head_blockers; stb_mutex_end(tq->remove); stb_sem_waitfor(tq->nonempty); stb_mutex_begin(tq->remove); --tq->head_blockers; } memcpy(output, tq->data + tq->head*tq->item_size, tq->item_size); stb_barrier(); tq->head = stb__tq_wrap(tq, tq->head+1); stb_sem_release(tq->nonfull); if (tq->head_blockers) // can't check if actually non-empty due to race? stb_sem_release(tq->nonempty); // if there are other blockers, wake one stb_mutex_end(tq->remove); return STB_TRUE; } int stb__threadq_grow(volatile stb_threadqueue *tq) { int n; char *p; assert(tq->remove != STB_MUTEX_NULL); // must have this to allow growth! stb_mutex_begin(tq->remove); n = tq->array_size * 2; p = (char *) realloc(tq->data, n * tq->item_size); if (p == NULL) { stb_mutex_end(tq->remove); stb_mutex_end(tq->add); return STB_FALSE; } if (tq->tail < tq->head) { memcpy(p + tq->array_size * tq->item_size, p, tq->tail * tq->item_size); tq->tail += tq->array_size; } tq->data = p; tq->array_size = n; stb_mutex_end(tq->remove); return STB_TRUE; } int stb__threadq_add_raw(stb_threadqueue *tq2, void *input, int block) { int tail,pos; volatile stb_threadqueue *tq = (volatile stb_threadqueue *) tq2; stb_mutex_begin(tq->add); for(;;) { pos = tq->tail; tail = stb__tq_wrap(tq, pos+1); if (tail != tq->head) break; // full if (tq->growable) { if (!stb__threadq_grow(tq)) { stb_mutex_end(tq->add); return STB_FALSE; // out of memory } } else if (!block) { stb_mutex_end(tq->add); return STB_FALSE; } else { ++tq->tail_blockers; stb_mutex_end(tq->add); stb_sem_waitfor(tq->nonfull); stb_mutex_begin(tq->add); --tq->tail_blockers; } } memcpy(tq->data + tq->item_size * pos, input, tq->item_size); stb_barrier(); tq->tail = tail; stb_sem_release(tq->nonempty); if (tq->tail_blockers) // can't check if actually non-full due to race? stb_sem_release(tq->nonfull); stb_mutex_end(tq->add); return STB_TRUE; } int stb_threadq_length(stb_threadqueue *tq2) { int a,b,n; volatile stb_threadqueue *tq = (volatile stb_threadqueue *) tq2; stb_mutex_begin(tq->add); a = tq->head; b = tq->tail; n = tq->array_size; stb_mutex_end(tq->add); if (a > b) b += n; return b-a; } int stb_threadq_get(stb_threadqueue *tq, void *output) { return stb__threadq_get_raw(tq, output, STB_FALSE); } void stb_threadq_get_block(stb_threadqueue *tq, void *output) { stb__threadq_get_raw(tq, output, STB_TRUE); } int stb_threadq_add(stb_threadqueue *tq, void *input) { return stb__threadq_add_raw(tq, input, STB_FALSE); } int stb_threadq_add_block(stb_threadqueue *tq, void *input) { return stb__threadq_add_raw(tq, input, STB_TRUE); } void stb_threadq_delete(stb_threadqueue *tq) { if (tq) { free(tq->data); stb_mutex_delete(tq->add); stb_mutex_delete(tq->remove); stb_sem_delete(tq->nonempty); stb_sem_delete(tq->nonfull); free(tq); } } #define STB_THREADQUEUE_DYNAMIC 0 stb_threadqueue *stb_threadq_new(int item_size, int num_items, int many_add, int many_remove) { int error=0; stb_threadqueue *tq = (stb_threadqueue *) malloc(sizeof(*tq)); if (tq == NULL) return NULL; if (num_items == STB_THREADQUEUE_DYNAMIC) { tq->growable = STB_TRUE; num_items = 32; } else tq->growable = STB_FALSE; tq->item_size = item_size; tq->array_size = num_items+1; tq->add = tq->remove = STB_MUTEX_NULL; tq->nonempty = tq->nonfull = STB_SEMAPHORE_NULL; tq->data = NULL; if (many_add) { tq->add = stb_mutex_new(); if (tq->add == STB_MUTEX_NULL) goto error; } if (many_remove || tq->growable) { tq->remove = stb_mutex_new(); if (tq->remove == STB_MUTEX_NULL) goto error; } tq->nonempty = stb_sem_new(1); if (tq->nonempty == STB_SEMAPHORE_NULL) goto error; tq->nonfull = stb_sem_new(1); if (tq->nonfull == STB_SEMAPHORE_NULL) goto error; tq->data = (char *) malloc(tq->item_size * tq->array_size); if (tq->data == NULL) goto error; tq->head = tq->tail = 0; tq->head_blockers = tq->tail_blockers = 0; return tq; error: stb_threadq_delete(tq); return NULL; } typedef struct { stb_thread_func f; void *d; volatile void **retval; stb_sync sync; } stb__workinfo; //static volatile stb__workinfo *stb__work; struct stb__workqueue { int numthreads; stb_threadqueue *tq; }; static stb_workqueue *stb__work_global; static void *stb__thread_workloop(void *p) { volatile stb_workqueue *q = (volatile stb_workqueue *) p; for(;;) { void *z; stb__workinfo w; stb_threadq_get_block(q->tq, &w); if (w.f == NULL) // null work is a signal to end the thread return NULL; z = w.f(w.d); if (w.retval) { stb_barrier(); *w.retval = z; } if (w.sync != STB_SYNC_NULL) stb_sync_reach(w.sync); } } stb_workqueue *stb_workq_new(int num_threads, int max_units) { return stb_workq_new_flags(num_threads, max_units, 0,0); } stb_workqueue *stb_workq_new_flags(int numthreads, int max_units, int no_add_mutex, int no_remove_mutex) { stb_workqueue *q = (stb_workqueue *) malloc(sizeof(*q)); if (q == NULL) return NULL; q->tq = stb_threadq_new(sizeof(stb__workinfo), max_units, !no_add_mutex, !no_remove_mutex); if (q->tq == NULL) { free(q); return NULL; } q->numthreads = 0; stb_workq_numthreads(q, numthreads); return q; } void stb_workq_delete(stb_workqueue *q) { while (stb_workq_length(q) != 0) stb__thread_sleep(1); stb_threadq_delete(q->tq); free(q); } static int stb__work_maxitems = STB_THREADQUEUE_DYNAMIC; static void stb_work_init(int num_threads) { if (stb__work_global == NULL) { stb__threadmutex_init(); stb_mutex_begin(stb__workmutex); stb_barrier(); if (*(stb_workqueue * volatile *) &stb__work_global == NULL) stb__work_global = stb_workq_new(num_threads, stb__work_maxitems); stb_mutex_end(stb__workmutex); } } static int stb__work_raw(stb_workqueue *q, stb_thread_func f, void *d, volatile void **return_code, stb_sync rel) { stb__workinfo w; if (q == NULL) { stb_work_init(1); q = stb__work_global; } w.f = f; w.d = d; w.retval = return_code; w.sync = rel; return stb_threadq_add(q->tq, &w); } int stb_workq_length(stb_workqueue *q) { return stb_threadq_length(q->tq); } int stb_workq(stb_workqueue *q, stb_thread_func f, void *d, volatile void **return_code) { if (f == NULL) return 0; return stb_workq_reach(q, f, d, return_code, NULL); } int stb_workq_reach(stb_workqueue *q, stb_thread_func f, void *d, volatile void **return_code, stb_sync rel) { if (f == NULL) return 0; return stb__work_raw(q, f, d, return_code, rel); } static void stb__workq_numthreads(stb_workqueue *q, int n) { while (q->numthreads < n) { stb_create_thread(stb__thread_workloop, q); ++q->numthreads; } while (q->numthreads > n) { stb__work_raw(q, NULL, NULL, NULL, NULL); --q->numthreads; } } void stb_workq_numthreads(stb_workqueue *q, int n) { stb_mutex_begin(stb__threadmutex); stb__workq_numthreads(q,n); stb_mutex_end(stb__threadmutex); } int stb_work_maxunits(int n) { if (stb__work_global == NULL) { stb__work_maxitems = n; stb_work_init(1); } return stb__work_maxitems; } int stb_work(stb_thread_func f, void *d, volatile void **return_code) { return stb_workq(stb__work_global, f,d,return_code); } int stb_work_reach(stb_thread_func f, void *d, volatile void **return_code, stb_sync rel) { return stb_workq_reach(stb__work_global, f,d,return_code,rel); } void stb_work_numthreads(int n) { if (stb__work_global == NULL) stb_work_init(n); else stb_workq_numthreads(stb__work_global, n); } #endif // STB_DEFINE ////////////////////////////////////////////////////////////////////////////// // // Background disk I/O // // #define STB_BGIO_READ_ALL (-1) STB_EXTERN int stb_bgio_read (char *filename, int offset, int len, stb_uchar **result, int *olen); STB_EXTERN int stb_bgio_readf (FILE *f , int offset, int len, stb_uchar **result, int *olen); STB_EXTERN int stb_bgio_read_to (char *filename, int offset, int len, stb_uchar *buffer, int *olen); STB_EXTERN int stb_bgio_readf_to(FILE *f , int offset, int len, stb_uchar *buffer, int *olen); typedef struct { int have_data; int is_valid; int is_dir; time_t filetime; stb_int64 filesize; } stb_bgstat; STB_EXTERN int stb_bgio_stat (char *filename, stb_bgstat *result); #ifdef STB_DEFINE static stb_workqueue *stb__diskio; static stb_mutex stb__diskio_mutex; void stb_thread_cleanup(void) { if (stb__work_global) stb_workq_delete(stb__work_global); stb__work_global = NULL; if (stb__threadmutex) stb_mutex_delete(stb__threadmutex); stb__threadmutex = NULL; if (stb__workmutex) stb_mutex_delete(stb__workmutex); stb__workmutex = NULL; if (stb__diskio) stb_workq_delete(stb__diskio); stb__diskio = NULL; if (stb__diskio_mutex)stb_mutex_delete(stb__diskio_mutex);stb__diskio_mutex= NULL; } typedef struct { char *filename; FILE *f; int offset; int len; stb_bgstat *stat_out; stb_uchar *output; stb_uchar **result; int *len_output; int *flag; } stb__disk_command; #define STB__MAX_DISK_COMMAND 100 static stb__disk_command stb__dc_queue[STB__MAX_DISK_COMMAND]; static int stb__dc_offset; void stb__io_init(void) { if (!stb__diskio) { stb__threadmutex_init(); stb_mutex_begin(stb__threadmutex); stb_barrier(); if (*(stb_thread * volatile *) &stb__diskio == NULL) { stb__diskio_mutex = stb_mutex_new(); // use many threads so OS can try to schedule seeks stb__diskio = stb_workq_new_flags(16,STB__MAX_DISK_COMMAND,STB_FALSE,STB_FALSE); } stb_mutex_end(stb__threadmutex); } } static void * stb__io_error(stb__disk_command *dc) { if (dc->len_output) *dc->len_output = 0; if (dc->result) *dc->result = NULL; if (dc->flag) *dc->flag = -1; return NULL; } static void * stb__io_task(void *p) { stb__disk_command *dc = (stb__disk_command *) p; int len; FILE *f; stb_uchar *buf; if (dc->stat_out) { struct _stati64 s; if (!_stati64(dc->filename, &s)) { dc->stat_out->filesize = s.st_size; dc->stat_out->filetime = s.st_mtime; dc->stat_out->is_dir = s.st_mode & _S_IFDIR; dc->stat_out->is_valid = (s.st_mode & _S_IFREG) || dc->stat_out->is_dir; } else dc->stat_out->is_valid = 0; stb_barrier(); dc->stat_out->have_data = 1; free(dc->filename); return 0; } if (dc->f) { #ifdef WIN32 f = _fdopen(_dup(_fileno(dc->f)), "rb"); #else f = fdopen(dup(fileno(dc->f)), "rb"); #endif if (!f) return stb__io_error(dc); } else { f = fopen(dc->filename, "rb"); free(dc->filename); if (!f) return stb__io_error(dc); } len = dc->len; if (len < 0) { fseek(f, 0, SEEK_END); len = ftell(f) - dc->offset; } if (fseek(f, dc->offset, SEEK_SET)) { fclose(f); return stb__io_error(dc); } if (dc->output) buf = dc->output; else { buf = (stb_uchar *) malloc(len); if (buf == NULL) { fclose(f); return stb__io_error(dc); } } len = fread(buf, 1, len, f); fclose(f); if (dc->len_output) *dc->len_output = len; if (dc->result) *dc->result = buf; if (dc->flag) *dc->flag = 1; return NULL; } int stb__io_add(char *fname, FILE *f, int off, int len, stb_uchar *out, stb_uchar **result, int *olen, int *flag, stb_bgstat *stat) { int res; stb__io_init(); // do memory allocation outside of mutex if (fname) fname = strdup(fname); stb_mutex_begin(stb__diskio_mutex); { stb__disk_command *dc = &stb__dc_queue[stb__dc_offset]; dc->filename = fname; dc->f = f; dc->offset = off; dc->len = len; dc->output = out; dc->result = result; dc->len_output = olen; dc->flag = flag; dc->stat_out = stat; res = stb_workq(stb__diskio, stb__io_task, dc, NULL); if (res) stb__dc_offset = (stb__dc_offset + 1 == STB__MAX_DISK_COMMAND ? 0 : stb__dc_offset+1); } stb_mutex_end(stb__diskio_mutex); return res; } int stb_bgio_read(char *filename, int offset, int len, stb_uchar **result, int *olen) { return stb__io_add(filename,NULL,offset,len,NULL,result,olen,NULL,NULL); } int stb_bgio_readf(FILE *f, int offset, int len, stb_uchar **result, int *olen) { return stb__io_add(NULL,f,offset,len,NULL,result,olen,NULL,NULL); } int stb_bgio_read_to(char *filename, int offset, int len, stb_uchar *buffer, int *olen) { return stb__io_add(filename,NULL,offset,len,buffer,NULL,olen,NULL,NULL); } int stb_bgio_readf_to(FILE *f, int offset, int len, stb_uchar *buffer, int *olen) { return stb__io_add(NULL,f,offset,len,buffer,NULL,olen,NULL,NULL); } STB_EXTERN int stb_bgio_stat (char *filename, stb_bgstat *result) { result->have_data = 0; return stb__io_add(filename,NULL,0,0,0,NULL,0,NULL, result); } #endif #endif ////////////////////////////////////////////////////////////////////////////// // // Fast malloc implementation // // This is a clone of TCMalloc, but without the thread support. // 1. large objects are allocated directly, page-aligned // 2. small objects are allocated in homogeonous heaps, 0 overhead // // We keep an allocation table for pages a la TCMalloc. This would // require 4MB for the entire address space, but we only allocate // the parts that are in use. The overhead from using homogenous heaps // everywhere is 3MB. (That is, if you allocate 1 object of each size, // you'll use 3MB.) #if defined(STB_DEFINE) && (defined(_WIN32) || defined(STB_FASTMALLOC)) #ifdef _WIN32 #ifndef _WINDOWS_ #ifndef STB__IMPORT #define STB__IMPORT STB_EXTERN __declspec(dllimport) #define STB__DW unsigned long #endif STB__IMPORT void * __stdcall VirtualAlloc(void *p, unsigned long size, unsigned long type, unsigned long protect); STB__IMPORT int __stdcall VirtualFree(void *p, unsigned long size, unsigned long freetype); #endif #define stb__alloc_pages_raw(x) (stb_uint32) VirtualAlloc(NULL, (x), 0x3000, 0x04) #define stb__dealloc_pages_raw(p) VirtualFree((void *) p, 0, 0x8000) #else #error "Platform not currently supported" #endif typedef struct stb__span { int start, len; struct stb__span *next, *prev; void *first_free; unsigned short list; // 1..256 free; 257..511 sizeclass; 0=large block short allocations; // # outstanding allocations for sizeclass } stb__span; // 24 static stb__span **stb__span_for_page; static int stb__firstpage, stb__lastpage; static void stb__update_page_range(int first, int last) { stb__span **sfp; int i, f,l; if (first >= stb__firstpage && last <= stb__lastpage) return; if (stb__span_for_page == NULL) { f = first; l = f+stb_max(last-f, 16384); l = stb_min(l, 1<<20); } else if (last > stb__lastpage) { f = stb__firstpage; l = f + (stb__lastpage - f) * 2; l = stb_clamp(last, l,1<<20); } else { l = stb__lastpage; f = l - (l - stb__firstpage) * 2; f = stb_clamp(f, 0,first); } sfp = (stb__span **) stb__alloc_pages_raw(sizeof(void *) * (l-f)); for (i=f; i < stb__firstpage; ++i) sfp[i - f] = NULL; for ( ; i < stb__lastpage ; ++i) sfp[i - f] = stb__span_for_page[i - stb__firstpage]; for ( ; i < l ; ++i) sfp[i - f] = NULL; if (stb__span_for_page) stb__dealloc_pages_raw(stb__span_for_page); stb__firstpage = f; stb__lastpage = l; stb__span_for_page = sfp; } static stb__span *stb__span_free=NULL; static stb__span *stb__span_first, *stb__span_end; static stb__span *stb__span_alloc(void) { stb__span *s = stb__span_free; if (s) stb__span_free = s->next; else { if (!stb__span_first) { stb__span_first = (stb__span *) stb__alloc_pages_raw(65536); if (stb__span_first == NULL) return NULL; stb__span_end = stb__span_first + (65536 / sizeof(stb__span)); } s = stb__span_first++; if (stb__span_first == stb__span_end) stb__span_first = NULL; } return s; } static stb__span *stb__spanlist[512]; static void stb__spanlist_unlink(stb__span *s) { if (s->prev) s->prev->next = s->next; else { int n = s->list; assert(stb__spanlist[n] == s); stb__spanlist[n] = s->next; } if (s->next) s->next->prev = s->prev; s->next = s->prev = NULL; s->list = 0; } static void stb__spanlist_add(int n, stb__span *s) { s->list = n; s->next = stb__spanlist[n]; s->prev = NULL; stb__spanlist[n] = s; if (s->next) s->next->prev = s; } #define stb__page_shift 12 #define stb__page_size (1 << stb__page_shift) #define stb__page_number(x) ((x) >> stb__page_shift) #define stb__page_address(x) ((x) << stb__page_shift) static void stb__set_span_for_page(stb__span *s) { int i; for (i=0; i < s->len; ++i) stb__span_for_page[s->start + i - stb__firstpage] = s; } static stb__span *stb__coalesce(stb__span *a, stb__span *b) { assert(a->start + a->len == b->start); if (a->list) stb__spanlist_unlink(a); if (b->list) stb__spanlist_unlink(b); a->len += b->len; b->len = 0; b->next = stb__span_free; stb__span_free = b; stb__set_span_for_page(a); return a; } static void stb__free_span(stb__span *s) { stb__span *n = NULL; if (s->start > stb__firstpage) { n = stb__span_for_page[s->start-1 - stb__firstpage]; if (n && n->allocations == -2 && n->start + n->len == s->start) s = stb__coalesce(n,s); } if (s->start + s->len < stb__lastpage) { n = stb__span_for_page[s->start + s->len - stb__firstpage]; if (n && n->allocations == -2 && s->start + s->len == n->start) s = stb__coalesce(s,n); } s->allocations = -2; stb__spanlist_add(s->len > 256 ? 256 : s->len, s); } static stb__span *stb__alloc_pages(int num) { stb__span *s = stb__span_alloc(); int p; if (!s) return NULL; p = stb__alloc_pages_raw(num << stb__page_shift); if (p == 0) { s->next = stb__span_free; stb__span_free = s; return 0; } assert(stb__page_address(stb__page_number(p)) == p); p = stb__page_number(p); stb__update_page_range(p, p+num); s->start = p; s->len = num; s->next = NULL; s->prev = NULL; stb__set_span_for_page(s); return s; } static stb__span *stb__alloc_span(int pagecount) { int i; stb__span *p = NULL; for(i=pagecount; i < 256; ++i) if (stb__spanlist[i]) { p = stb__spanlist[i]; break; } if (!p) { p = stb__spanlist[256]; while (p && p->len < pagecount) p = p->next; } if (!p) { p = stb__alloc_pages(pagecount < 16 ? 16 : pagecount); if (p == NULL) return 0; } else stb__spanlist_unlink(p); if (p->len > pagecount) { stb__span *q = stb__span_alloc(); if (q) { q->start = p->start + pagecount; q->len = p->len - pagecount; p->len = pagecount; for (i=0; i < q->len; ++i) stb__span_for_page[q->start+i - stb__firstpage] = q; stb__spanlist_add(q->len > 256 ? 256 : q->len, q); } } return p; } #define STB__MAX_SMALL_SIZE 32768 #define STB__MAX_SIZE_CLASSES 256 static unsigned char stb__class_base[32]; static unsigned char stb__class_shift[32]; static unsigned char stb__pages_for_class[STB__MAX_SIZE_CLASSES]; static int stb__size_for_class[STB__MAX_SIZE_CLASSES]; stb__span *stb__get_nonempty_sizeclass(int c) { int s = c + 256, i, size, tsize; // remap to span-list index char *z; void *q; stb__span *p = stb__spanlist[s]; if (p) { if (p->first_free) return p; // fast path: it's in the first one in list for (p=p->next; p; p=p->next) if (p->first_free) { // move to front for future queries stb__spanlist_unlink(p); stb__spanlist_add(s, p); return p; } } // no non-empty ones, so allocate a new one p = stb__alloc_span(stb__pages_for_class[c]); if (!p) return NULL; // create the free list up front size = stb__size_for_class[c]; tsize = stb__pages_for_class[c] << stb__page_shift; i = 0; z = (char *) stb__page_address(p->start); q = NULL; while (i + size <= tsize) { * (void **) z = q; q = z; z += size; i += size; } p->first_free = q; p->allocations = 0; stb__spanlist_add(s,p); return p; } static int stb__sizeclass(size_t sz) { int z = stb_log2_floor(sz); // -1 below to group e.g. 13,14,15,16 correctly return stb__class_base[z] + ((sz-1) >> stb__class_shift[z]); } static void stb__init_sizeclass(void) { int i, size, overhead; int align_shift = 2; // allow 4-byte and 12-byte blocks as well, vs. TCMalloc int next_class = 1; int last_log = 0; for (i = 0; i < align_shift; i++) { stb__class_base [i] = next_class; stb__class_shift[i] = align_shift; } for (size = 1 << align_shift; size <= STB__MAX_SMALL_SIZE; size += 1 << align_shift) { i = stb_log2_floor(size); if (i > last_log) { if (size == 16) ++align_shift; // switch from 4-byte to 8-byte alignment else if (size >= 128 && align_shift < 8) ++align_shift; stb__class_base[i] = next_class - ((size-1) >> align_shift); stb__class_shift[i] = align_shift; last_log = i; } stb__size_for_class[next_class++] = size; } for (i=1; i <= STB__MAX_SMALL_SIZE; ++i) assert(i <= stb__size_for_class[stb__sizeclass(i)]); overhead = 0; for (i = 1; i < next_class; i++) { int s = stb__size_for_class[i]; size = stb__page_size; while (size % s > size >> 3) size += stb__page_size; stb__pages_for_class[i] = (unsigned char) (size >> stb__page_shift); overhead += size; } assert(overhead < (4 << 20)); // make sure it's under 4MB of overhead } #ifdef STB_DEBUG #define stb__smemset(a,b,c) memset((void *) a, b, c) #elif defined(STB_FASTMALLOC_INIT) #define stb__smemset(a,b,c) memset((void *) a, b, c) #else #define stb__smemset(a,b,c) #endif void *stb_smalloc(size_t sz) { stb__span *s; if (sz == 0) return NULL; if (stb__size_for_class[1] == 0) stb__init_sizeclass(); if (sz > STB__MAX_SMALL_SIZE) { s = stb__alloc_span((sz + stb__page_size - 1) >> stb__page_shift); if (s == NULL) return NULL; s->list = 0; s->next = s->prev = NULL; s->allocations = -32767; stb__smemset(stb__page_address(s->start), 0xcd, (sz+3)&~3); return (void *) stb__page_address(s->start); } else { void *p; int c = stb__sizeclass(sz); s = stb__spanlist[256+c]; if (!s || !s->first_free) s = stb__get_nonempty_sizeclass(c); if (s == NULL) return NULL; p = s->first_free; s->first_free = * (void **) p; ++s->allocations; stb__smemset(p,0xcd, sz); return p; } } int stb_ssize(void *p) { stb__span *s; if (p == NULL) return 0; s = stb__span_for_page[stb__page_number((stb_uint) p) - stb__firstpage]; if (s->list >= 256) { return stb__size_for_class[s->list - 256]; } else { assert(s->list == 0); return s->len << stb__page_shift; } } void stb_sfree(void *p) { stb__span *s; if (p == NULL) return; s = stb__span_for_page[stb__page_number((stb_uint) p) - stb__firstpage]; if (s->list >= 256) { stb__smemset(p, 0xfe, stb__size_for_class[s->list-256]); * (void **) p = s->first_free; s->first_free = p; if (--s->allocations == 0) { stb__spanlist_unlink(s); stb__free_span(s); } } else { assert(s->list == 0); stb__smemset(p, 0xfe, stb_ssize(p)); stb__free_span(s); } } void *stb_srealloc(void *p, size_t sz) { size_t cur_size; if (p == NULL) return stb_smalloc(sz); if (sz == 0) { stb_sfree(p); return NULL; } cur_size = stb_ssize(p); if (sz > cur_size || sz <= (cur_size >> 1)) { void *q; if (sz > cur_size && sz < (cur_size << 1)) sz = cur_size << 1; q = stb_smalloc(sz); if (q == NULL) return NULL; memcpy(q, p, sz < cur_size ? sz : cur_size); stb_sfree(p); return q; } return p; } void *stb_scalloc(size_t n, size_t sz) { void *p; if (n == 0 || sz == 0) return NULL; if (stb_log2_ceil(n) + stb_log2_ceil(n) >= 32) return NULL; p = stb_smalloc(n*sz); if (p) memset(p, 0, n*sz); return p; } char *stb_sstrdup(char *s) { int n = strlen(s); char *p = (char *) stb_smalloc(n+1); if (p) strcpy(p,s); return p; } #endif // STB_DEFINE ////////////////////////////////////////////////////////////////////////////// // // Source code constants // // This is a trivial system to let you specify constants in source code, // then while running you can change the constants. // // Note that you can't wrap the #defines, because we need to know their // names. So we provide a pre-wrapped version without 'STB_' for convenience; // to request it, #define STB_CONVENIENT_H, yielding: // KI -- integer // KU -- unsigned integer // KF -- float // KD -- double // KS -- string constant // // Defaults to functioning in debug build, not in release builds. // To force on, define STB_ALWAYS_H #ifdef STB_CONVENIENT_H #define KI(x) STB_I(x) #define KU(x) STB_UI(x) #define KF(x) STB_F(x) #define KD(x) STB_D(x) #define KS(x) STB_S(x) #endif STB_EXTERN void stb_source_path(char *str); #ifdef STB_DEFINE char *stb__source_path; void stb_source_path(char *path) { stb__source_path = path; } char *stb__get_sourcefile_path(char *file) { static char filebuf[512]; if (stb__source_path) { sprintf(filebuf, "%s/%s", stb__source_path, file); if (stb_fexists(filebuf)) return filebuf; } if (stb_fexists(file)) return file; sprintf(filebuf, "../%s", file); if (!stb_fexists(filebuf)) return filebuf; return file; } #endif #define STB_F(x) ((float) STB_H(x)) #define STB_UI(x) ((unsigned int) STB_I(x)) #if !defined(STB_DEBUG) && !defined(STB_ALWAYS_H) #define STB_D(x) ((double) (x)) #define STB_I(x) ((int) (x)) #define STB_S(x) ((char *) (x)) #else #define STB_D(x) stb__double_constant(__FILE__, __LINE__-1, (x)) #define STB_I(x) stb__int_constant(__FILE__, __LINE__-1, (x)) #define STB_S(x) stb__string_constant(__FILE__, __LINE__-1, (x)) STB_EXTERN double stb__double_constant(char *file, int line, double x); STB_EXTERN int stb__int_constant(char *file, int line, int x); STB_EXTERN char * stb__string_constant(char *file, int line, char *str); #ifdef STB_DEFINE enum { STB__CTYPE_int, STB__CTYPE_uint, STB__CTYPE_float, STB__CTYPE_double, STB__CTYPE_string, }; typedef struct { int line; int type; union { int ival; double dval; char *sval; }; } stb__Entry; typedef struct { stb__Entry *entries; char *filename; time_t timestamp; char **file_data; int file_len; unsigned short *line_index; } stb__FileEntry; static void stb__constant_parse(stb__FileEntry *f, int i) { char *s; int n; if (!stb_arr_valid(f->entries, i)) return; n = f->entries[i].line; if (n >= f->file_len) return; s = f->file_data[n]; switch (f->entries[i].type) { case STB__CTYPE_float: while (*s) { if (!strncmp(s, "STB_D(", 6)) { s+=6; goto matched_float; } if (!strncmp(s, "STB_F(", 6)) { s+=6; goto matched_float; } if (!strncmp(s, "KD(", 3)) { s+=3; goto matched_float; } if (!strncmp(s, "KF(", 3)) { s+=3; goto matched_float; } ++s; } break; matched_float: f->entries[i].dval = strtod(s, NULL); break; case STB__CTYPE_int: while (*s) { if (!strncmp(s, "STB_I(", 6)) { s+=6; goto matched_int; } if (!strncmp(s, "STB_UI(", 7)) { s+=7; goto matched_int; } if (!strncmp(s, "KI(", 3)) { s+=3; goto matched_int; } if (!strncmp(s, "KU(", 3)) { s+=3; goto matched_int; } ++s; } break; matched_int: { int neg=0; s = stb_skipwhite(s); while (*s == '-') { neg = !neg; s = stb_skipwhite(s+1); } // handle '- - 5', pointlessly if (s[0] == '0' && tolower(s[1]) == 'x') f->entries[i].ival = strtol(s, NULL, 16); else if (s[0] == '0') f->entries[i].ival = strtol(s, NULL, 8); else f->entries[i].ival = strtol(s, NULL, 10); if (neg) f->entries[i].ival = -f->entries[i].ival; break; } case STB__CTYPE_string: // @TODO break; } } static stb_sdict *stb__constant_file_hash; stb__Entry *stb__constant_get_entry(char *filename, int line, int type) { int i; stb__FileEntry *f; if (stb__constant_file_hash == NULL) stb__constant_file_hash = stb_sdict_new(STB_TRUE); f = (stb__FileEntry*) stb_sdict_get(stb__constant_file_hash, filename); if (f == NULL) { char *s = stb__get_sourcefile_path(filename); if (s == NULL || !stb_fexists(s)) return 0; f = (stb__FileEntry *) malloc(sizeof(*f)); f->timestamp = stb_ftimestamp(s); f->file_data = stb_stringfile(s, &f->file_len); f->filename = strdup(s); // cache the full path f->entries = NULL; f->line_index = 0; stb_arr_setlen(f->line_index, f->file_len); memset(f->line_index, 0xff, stb_arr_storage(f->line_index)); } else { time_t t = stb_ftimestamp(f->filename); if (f->timestamp != t) { f->timestamp = t; free(f->file_data); f->file_data = stb_stringfile(f->filename, &f->file_len); stb_arr_setlen(f->line_index, f->file_len); for (i=0; i < stb_arr_len(f->entries); ++i) stb__constant_parse(f, i); } } if (line >= f->file_len) return 0; if (f->line_index[line] >= stb_arr_len(f->entries)) { // need a new entry int n = stb_arr_len(f->entries); stb__Entry e; e.line = line; if (line < f->file_len) f->line_index[line] = n; e.type = type; stb_arr_push(f->entries, e); stb__constant_parse(f, n); } return f->entries + f->line_index[line]; } double stb__double_constant(char *file, int line, double x) { stb__Entry *e = stb__constant_get_entry(file, line, STB__CTYPE_float); if (!e) return x; return e->dval; } int stb__int_constant(char *file, int line, int x) { stb__Entry *e = stb__constant_get_entry(file, line, STB__CTYPE_int); if (!e) return x; return e->ival; } char * stb__string_constant(char *file, int line, char *x) { stb__Entry *e = stb__constant_get_entry(file, line, STB__CTYPE_string); if (!e) return x; return e->sval; } #endif // STB_DEFINE #endif // !STB_DEBUG && !STB_ALWAYS_H #ifdef STB_STUA ////////////////////////////////////////////////////////////////////////// // // stua: little scripting language // // define STB_STUA to compile it // // see http://nothings.org/stb/stb_stua.html for documentation // // basic parsing model: // // lexical analysis // use stb_lex() to parse tokens; keywords get their own tokens // // parsing: // recursive descent parser. too much of a hassle to make an unambiguous // LR(1) grammar, and one-pass generation is clumsier (recursive descent // makes it easier to e.g. compile nested functions). on the other hand, // dictionary syntax required hackery to get extra lookahead. // // codegen: // output into an evaluation tree, using array indices as 'pointers' // // run: // traverse the tree; support for 'break/continue/return' is tricky // // garbage collection: // stu__mark and sweep; explicit stack with non-stu__compile_global_scope roots typedef stb_int32 stua_obj; typedef stb_idict stua_dict; STB_EXTERN void stua_run_script(char *s); STB_EXTERN void stua_uninit(void); extern stua_obj stua_globals; STB_EXTERN double stua_number(stua_obj z); STB_EXTERN stua_obj stua_getnil(void); STB_EXTERN stua_obj stua_getfalse(void); STB_EXTERN stua_obj stua_gettrue(void); STB_EXTERN stua_obj stua_string(char *z); STB_EXTERN stua_obj stua_make_number(double d); STB_EXTERN stua_obj stua_box(int type, void *data, int size); enum { STUA_op_negate=129, STUA_op_shl, STUA_op_ge, STUA_op_shr, STUA_op_le, STUA_op_shru, STUA_op_last }; #define STUA_NO_VALUE 2 // equivalent to a tagged NULL STB_EXTERN stua_obj (*stua_overload)(int op, stua_obj a, stua_obj b, stua_obj c); STB_EXTERN stua_obj stua_error(char *err, ...); STB_EXTERN stua_obj stua_pushroot(stua_obj o); STB_EXTERN void stua_poproot ( void ); #ifdef STB_DEFINE // INTERPRETER // 31-bit floating point implementation // force the (1 << 30) bit (2nd highest bit) to be zero by re-biasing the exponent; // then shift and set the bottom bit static stua_obj stu__floatp(float *f) { unsigned int n = *(unsigned int *) f; unsigned int e = n & (0xff << 23); assert(sizeof(int) == 4 && sizeof(float) == 4); if (!e) // zero? n = n; // no change else if (e < (64 << 23)) // underflow of the packed encoding? n = (n & 0x80000000); // signed 0 else if (e > (190 << 23)) // overflow of the encoding? (or INF or NAN) n = (n & 0x80000000) + (127 << 23); // new INF encoding else n -= 0x20000000; // now we need to shuffle the bits so that the spare bit is at the bottom assert((n & 0x40000000) == 0); return (n & 0x80000000) + (n << 1) + 1; } static unsigned char stu__getfloat_addend[256]; static float stu__getfloat(stua_obj v) { unsigned int n; unsigned int e = ((unsigned int) v) >> 24; n = (int) v >> 1; // preserve high bit n += stu__getfloat_addend[e] << 24; return *(float *) &n; } stua_obj stua_float(float f) { return stu__floatp(&f); } static void stu__float_init(void) { int i; stu__getfloat_addend[0] = 0; // do nothing to biased exponent of 0 for (i=1; i < 127; ++i) stu__getfloat_addend[i] = 32; // undo the -0x20000000 stu__getfloat_addend[127] = 64; // convert packed INF to INF (0x3f -> 0x7f) for (i=0; i < 128; ++i) // for signed floats, remove the bit we just shifted down stu__getfloat_addend[128+i] = stu__getfloat_addend[i] - 64; } // Tagged data type implementation // TAGS: #define stu__int_tag 0 // of 2 bits // 00 int #define stu__float_tag 1 // of 1 bit // 01 float #define stu__ptr_tag 2 // of 2 bits // 10 boxed // 11 float #define stu__tag(x) ((x) & 3) #define stu__number(x) (stu__tag(x) != stu__ptr_tag) #define stu__isint(x) (stu__tag(x) == stu__int_tag) #define stu__int(x) ((x) >> 2) #define stu__float(x) (stu__getfloat(x)) #define stu__makeint(v) ((v)*4+stu__int_tag) // boxed data, and tag support for boxed data enum { STU___float = 1, STU___int = 2, STU___number = 3, STU___string = 4, STU___function = 5, STU___dict = 6, STU___boolean = 7, STU___error = 8, }; // boxed data #define STU__BOX short type, stua_gc typedef struct stu__box { STU__BOX; } stu__box; stu__box stu__nil = { 0, 1 }; stu__box stu__true = { STU___boolean, 1, }; stu__box stu__false = { STU___boolean, 1, }; #define stu__makeptr(v) ((stua_obj) (v) + stu__ptr_tag) #define stua_nil stu__makeptr(&stu__nil) #define stua_true stu__makeptr(&stu__true) #define stua_false stu__makeptr(&stu__false) stua_obj stua_getnil(void) { return stua_nil; } stua_obj stua_getfalse(void) { return stua_false; } stua_obj stua_gettrue(void) { return stua_true; } #define stu__ptr(x) ((stu__box *) ((x) - stu__ptr_tag)) #define stu__checkt(t,x) ((t) == STU___float ? ((x) & 1) == stu__float_tag : \ (t) == STU___int ? stu__isint(x) : \ (t) == STU___number ? stu__number(x) : \ stu__tag(x) == stu__ptr_tag && stu__ptr(x)->type == (t)) typedef struct { STU__BOX; void *ptr; } stu__wrapper; // implementation of a 'function' or function + closure typedef struct stu__func { STU__BOX; stua_obj closure_source; // 0 - regular function; 4 - C function // if closure, pointer to source function union { stua_obj closure_data; // partial-application data void *store; // pointer to free that holds 'code' stua_obj (*func)(stua_dict *context); } f; // closure ends here short *code; int num_param; stua_obj *param; // list of parameter strings } stu__func; // apply this to 'short *code' to get at data #define stu__const(f) ((stua_obj *) (f)) static void stu__free_func(stu__func *f) { if (f->closure_source == 0) free(f->f.store); if ((stb_uint) f->closure_source <= 4) free(f->param); free(f); } #define stu__pd(x) ((stua_dict *) stu__ptr(x)) #define stu__pw(x) ((stu__wrapper *) stu__ptr(x)) #define stu__pf(x) ((stu__func *) stu__ptr(x)) // garbage-collection static stu__box ** stu__gc_ptrlist; static stua_obj * stu__gc_root_stack; stua_obj stua_pushroot(stua_obj o) { stb_arr_push(stu__gc_root_stack, o); return o; } void stua_poproot ( void ) { stb_arr_pop(stu__gc_root_stack); } static stb_sdict *stu__strings; static void stu__mark(stua_obj z) { int i; stu__box *p = stu__ptr(z); if (p->stua_gc == 1) return; // already marked assert(p->stua_gc == 0); p->stua_gc = 1; switch(p->type) { case STU___function: { stu__func *f = (stu__func *) p; if ((stb_uint) f->closure_source <= 4) { if (f->closure_source == 0) { for (i=1; i <= f->code[0]; ++i) if (!stu__number(((stua_obj *) f->code)[-i])) stu__mark(((stua_obj *) f->code)[-i]); } for (i=0; i < f->num_param; ++i) stu__mark(f->param[i]); } else { stu__mark(f->closure_source); stu__mark(f->f.closure_data); } break; } case STU___dict: { stua_dict *e = (stua_dict *) p; for (i=0; i < e->limit; ++i) if (e->table[i].k != STB_IEMPTY && e->table[i].k != STB_IDEL) { if (!stu__number(e->table[i].k)) stu__mark((int) e->table[i].k); if (!stu__number(e->table[i].v)) stu__mark((int) e->table[i].v); } break; } } } static int stu__num_allocs, stu__size_allocs; static stua_obj stu__flow_val = stua_nil; // used for break & return static void stua_gc(int force) { int i; if (!force && stu__num_allocs == 0 && stu__size_allocs == 0) return; stu__num_allocs = stu__size_allocs = 0; //printf("[gc]\n"); // clear marks for (i=0; i < stb_arr_len(stu__gc_ptrlist); ++i) stu__gc_ptrlist[i]->stua_gc = 0; // stu__mark everything reachable stu__nil.stua_gc = stu__true.stua_gc = stu__false.stua_gc = 1; stu__mark(stua_globals); if (!stu__number(stu__flow_val)) stu__mark(stu__flow_val); for (i=0; i < stb_arr_len(stu__gc_root_stack); ++i) if (!stu__number(stu__gc_root_stack[i])) stu__mark(stu__gc_root_stack[i]); // sweep unreachables for (i=0; i < stb_arr_len(stu__gc_ptrlist);) { stu__box *z = stu__gc_ptrlist[i]; if (!z->stua_gc) { switch (z->type) { case STU___dict: stb_idict_destroy((stua_dict *) z); break; case STU___error: free(((stu__wrapper *) z)->ptr); break; case STU___string: stb_sdict_remove(stu__strings, (char*) ((stu__wrapper *) z)->ptr, NULL); free(z); break; case STU___function: stu__free_func((stu__func *) z); break; } // swap in the last item over this, and repeat z = stb_arr_pop(stu__gc_ptrlist); stu__gc_ptrlist[i] = z; } else ++i; } } static void stu__consider_gc(stua_obj x) { if (stu__size_allocs < 100000) return; if (stu__num_allocs < 10 && stu__size_allocs < 1000000) return; stb_arr_push(stu__gc_root_stack, x); stua_gc(0); stb_arr_pop(stu__gc_root_stack); } static stua_obj stu__makeobj(int type, void *data, int size, int safe_to_gc) { stua_obj x = stu__makeptr(data); ((stu__box *) data)->type = type; stb_arr_push(stu__gc_ptrlist, (stu__box *) data); stu__num_allocs += 1; stu__size_allocs += size; if (safe_to_gc) stu__consider_gc(x); return x; } stua_obj stua_box(int type, void *data, int size) { stu__wrapper *p = (stu__wrapper *) malloc(sizeof(*p)); p->ptr = data; return stu__makeobj(type, p, size, 0); } // a stu string can be directly compared for equality, because // they go into a hash table stua_obj stua_string(char *z) { stu__wrapper *b = (stu__wrapper *) stb_sdict_get(stu__strings, z); if (b == NULL) { int o = stua_box(STU___string, NULL, strlen(z) + sizeof(*b)); b = stu__pw(o); stb_sdict_add(stu__strings, z, b); stb_sdict_getkey(stu__strings, z, (char **) &b->ptr); } return stu__makeptr(b); } // stb_obj dictionary is just an stb_idict static void stu__set(stua_dict *d, stua_obj k, stua_obj v) { if (stb_idict_set(d, k, v)) stu__size_allocs += 8; } static stua_obj stu__get(stua_dict *d, stua_obj k, stua_obj res) { stb_idict_get_flag(d, k, &res); return res; } static stua_obj make_string(char *z, int len) { stua_obj s; char temp[256], *q = (char *) stb_temp(temp, len+1), *p = q; while (len > 0) { if (*z == '\\') { if (z[1] == 'n') *p = '\n'; else if (z[1] == 'r') *p = '\r'; else if (z[1] == 't') *p = '\t'; else *p = z[1]; p += 1; z += 2; len -= 2; } else { *p++ = *z++; len -= 1; } } *p = 0; s = stua_string(q); stb_tempfree(temp, q); return s; } enum token_names { T__none=128, ST_shl = STUA_op_shl, ST_ge = STUA_op_ge, ST_shr = STUA_op_shr, ST_le = STUA_op_le, ST_shru = STUA_op_shru, STU__negate = STUA_op_negate, ST__reset_numbering = STUA_op_last, ST_white, ST_id, ST_float, ST_decimal, ST_hex, ST_char,ST_string, ST_number, // make sure the keywords come _AFTER_ ST_id, so stb_lex prefer them ST_if, ST_while, ST_for, ST_eq, ST_nil, ST_then, ST_do, ST_in, ST_ne, ST_true, ST_else, ST_break, ST_let, ST_and, ST_false, ST_elseif, ST_continue, ST_into, ST_or, ST_repeat, ST_end, ST_as, ST_return, ST_var, ST_func, ST_catch, ST__frame, ST__max_terminals, STU__defaultparm, STU__seq, }; static stua_dict * stu__globaldict; stua_obj stua_globals; static enum { FLOW_normal, FLOW_continue, FLOW_break, FLOW_return, FLOW_error, } stu__flow; stua_obj stua_error(char *z, ...) { stua_obj a; char temp[4096], *x; va_list v; va_start(v,z); vsprintf(temp, z, v); va_end(v); x = strdup(temp); a = stua_box(STU___error, x, strlen(x)); stu__flow = FLOW_error; stu__flow_val = a; return stua_nil; } double stua_number(stua_obj z) { return stu__tag(z) == stu__int_tag ? stu__int(z) : stu__float(z); } stua_obj stua_make_number(double d) { double e = floor(d); if (e == d && e < (1 << 29) && e >= -(1 << 29)) return stu__makeint((int) e); else return stua_float((float) d); } stua_obj (*stua_overload)(int op, stua_obj a, stua_obj b, stua_obj c) = NULL; static stua_obj stu__op(int op, stua_obj a, stua_obj b, stua_obj c) { stua_obj r = STUA_NO_VALUE; if (op == '+') { if (stu__checkt(STU___string, a) && stu__checkt(STU___string, b)) { ;// @TODO: string concatenation } else if (stu__checkt(STU___function, a) && stu__checkt(STU___dict, b)) { stu__func *f = (stu__func *) malloc(12); assert(offsetof(stu__func, code)==12); f->closure_source = a; f->f.closure_data = b; return stu__makeobj(STU___function, f, 16, 1); } } if (stua_overload) r = stua_overload(op,a,b,c); if (stu__flow != FLOW_error && r == STUA_NO_VALUE) stua_error("Typecheck for operator %d", op), r=stua_nil; return r; } #define STU__EVAL2(a,b) \ a = stu__eval(stu__f[n+1]); if (stu__flow) break; stua_pushroot(a); \ b = stu__eval(stu__f[n+2]); stua_poproot(); if (stu__flow) break; #define STU__FB(op) \ STU__EVAL2(a,b) \ if (stu__tag(a) == stu__int_tag && stu__tag(b) == stu__int_tag) \ return ((a) op (b)); \ if (stu__number(a) && stu__number(b)) \ return stua_make_number(stua_number(a) op stua_number(b)); \ return stu__op(stu__f[n], a,b, stua_nil) #define STU__F(op) \ STU__EVAL2(a,b) \ if (stu__number(a) && stu__number(b)) \ return stua_make_number(stua_number(a) op stua_number(b)); \ return stu__op(stu__f[n], a,b, stua_nil) #define STU__I(op) \ STU__EVAL2(a,b) \ if (stu__tag(a) == stu__int_tag && stu__tag(b) == stu__int_tag) \ return stu__makeint(stu__int(a) op stu__int(b)); \ return stu__op(stu__f[n], a,b, stua_nil) #define STU__C(op) \ STU__EVAL2(a,b) \ if (stu__number(a) && stu__number(b)) \ return (stua_number(a) op stua_number(b)) ? stua_true : stua_false; \ return stu__op(stu__f[n], a,b, stua_nil) #define STU__CE(op) \ STU__EVAL2(a,b) \ return (a op b) ? stua_true : stua_false static short *stu__f; static stua_obj stu__f_obj; static stua_dict *stu__c; static stua_obj stu__funceval(stua_obj fo, stua_obj co); static int stu__cond(stua_obj x) { if (stu__flow) return 0; if (!stu__checkt(STU___boolean, x)) x = stu__op('!', x, stua_nil, stua_nil); if (x == stua_true ) return 1; if (x == stua_false) return 0; stu__flow = FLOW_error; return 0; } // had to manually eliminate tailcall recursion for debugging complex stuff #define TAILCALL(x) n = (x); goto top; static stua_obj stu__eval(int n) { top: if (stu__flow >= FLOW_return) return stua_nil; // is this needed? if (n < 0) return stu__const(stu__f)[n]; assert(n != 0 && n != 1); switch (stu__f[n]) { stua_obj a,b,c; case ST_catch: a = stu__eval(stu__f[n+1]); if (stu__flow == FLOW_error) { a=stu__flow_val; stu__flow = FLOW_normal; } return a; case ST_var: b = stu__eval(stu__f[n+2]); if (stu__flow) break; stu__set(stu__c, stu__const(stu__f)[stu__f[n+1]], b); return b; case STU__seq: stu__eval(stu__f[n+1]); if (stu__flow) break; TAILCALL(stu__f[n+2]); case ST_if: if (!stu__cond(stu__eval(stu__f[n+1]))) return stua_nil; TAILCALL(stu__f[n+2]); case ST_else: a = stu__cond(stu__eval(stu__f[n+1])); TAILCALL(stu__f[n + 2 + !a]); #define STU__HANDLE_BREAK \ if (stu__flow >= FLOW_break) { \ if (stu__flow == FLOW_break) { \ a = stu__flow_val; \ stu__flow = FLOW_normal; \ stu__flow_val = stua_nil; \ return a; \ } \ return stua_nil; \ } case ST_as: stu__eval(stu__f[n+3]); STU__HANDLE_BREAK // fallthrough! case ST_while: a = stua_nil; stua_pushroot(a); while (stu__cond(stu__eval(stu__f[n+1]))) { stua_poproot(); a = stu__eval(stu__f[n+2]); STU__HANDLE_BREAK stu__flow = FLOW_normal; // clear 'continue' flag stua_pushroot(a); if (stu__f[n+3]) stu__eval(stu__f[n+3]); STU__HANDLE_BREAK stu__flow = FLOW_normal; // clear 'continue' flag } stua_poproot(); return a; case ST_break: stu__flow = FLOW_break; stu__flow_val = stu__eval(stu__f[n+1]); break; case ST_continue:stu__flow = FLOW_continue; break; case ST_return: stu__flow = FLOW_return; stu__flow_val = stu__eval(stu__f[n+1]); break; case ST__frame: return stu__f_obj; case '[': STU__EVAL2(a,b); if (stu__checkt(STU___dict, a)) return stu__get(stu__pd(a), b, stua_nil); return stu__op(stu__f[n], a, b, stua_nil); case '=': a = stu__eval(stu__f[n+2]); if (stu__flow) break; n = stu__f[n+1]; if (stu__f[n] == ST_id) { if (!stb_idict_update(stu__c, stu__const(stu__f)[stu__f[n+1]], a)) if (!stb_idict_update(stu__globaldict, stu__const(stu__f)[stu__f[n+1]], a)) return stua_error("Assignment to undefined variable"); } else if (stu__f[n] == '[') { stua_pushroot(a); b = stu__eval(stu__f[n+1]); if (stu__flow) { stua_poproot(); break; } stua_pushroot(b); c = stu__eval(stu__f[n+2]); stua_poproot(); stua_poproot(); if (stu__flow) break; if (!stu__checkt(STU___dict, b)) return stua_nil; stu__set(stu__pd(b), c, a); } else { return stu__op(stu__f[n], stu__eval(n), a, stua_nil); } return a; case STU__defaultparm: a = stu__eval(stu__f[n+2]); stu__flow = FLOW_normal; if (stb_idict_add(stu__c, stu__const(stu__f)[stu__f[n+1]], a)) stu__size_allocs += 8; return stua_nil; case ST_id: a = stu__get(stu__c, stu__const(stu__f)[stu__f[n+1]], STUA_NO_VALUE); // try local variable return a != STUA_NO_VALUE // else try stu__compile_global_scope variable ? a : stu__get(stu__globaldict, stu__const(stu__f)[stu__f[n+1]], stua_nil); case STU__negate:a = stu__eval(stu__f[n+1]); if (stu__flow) break; return stu__isint(a) ? -a : stu__op(stu__f[n], a, stua_nil, stua_nil); case '~': a = stu__eval(stu__f[n+1]); if (stu__flow) break; return stu__isint(a) ? (~a)&~3 : stu__op(stu__f[n], a, stua_nil, stua_nil); case '!': a = stu__eval(stu__f[n+1]); if (stu__flow) break; a = stu__cond(a); if (stu__flow) break; return a ? stua_true : stua_false; case ST_eq: STU__CE(==); case ST_le: STU__C(<=); case '<': STU__C(<); case ST_ne: STU__CE(!=); case ST_ge: STU__C(>=); case '>': STU__C(>); case '+' : STU__FB(+); case '*': STU__F(*); case '&': STU__I(&); case ST_shl: STU__I(<<); case '-' : STU__FB(-); case '/': STU__F(/); case '|': STU__I(|); case ST_shr: STU__I(>>); case '%': STU__I(%); case '^': STU__I(^); case ST_shru: STU__EVAL2(a,b); if (stu__tag(a) == stu__int_tag && stu__tag(b) == stu__int_tag) return stu__makeint((unsigned) stu__int(a) >> stu__int(b)); return stu__op(stu__f[n], a,b, stua_nil); case ST_and: a = stu__eval(stu__f[n+1]); b = stu__cond(a); if (stu__flow) break; return a ? stu__eval(stu__f[n+2]) : a; case ST_or : a = stu__eval(stu__f[n+1]); b = stu__cond(a); if (stu__flow) break; return a ? b : stu__eval(stu__f[n+2]); case'(':case':': STU__EVAL2(a,b); if (!stu__checkt(STU___function, a)) return stu__op(stu__f[n], a,b, stua_nil); if (!stu__checkt(STU___dict, b)) return stua_nil; if (stu__f[n] == ':') b = stu__makeobj(STU___dict, stb_idict_copy(stu__pd(b)), stb_idict_memory_usage(stu__pd(b)), 0); a = stu__funceval(a,b); return a; case '{' : { stua_dict *d; d = stb_idict_new_size(stu__f[n+1] > 40 ? 64 : 16); if (d == NULL) return stua_nil; // breakpoint fodder c = stu__makeobj(STU___dict, d, 32, 1); stua_pushroot(c); a = stu__f[n+1]; for (b=0; b < a; ++b) { stua_obj x = stua_pushroot(stu__eval(stu__f[n+2 + b*2 + 0])); stua_obj y = stu__eval(stu__f[n+2 + b*2 + 1]); stua_poproot(); if (stu__flow) { stua_poproot(); return stua_nil; } stu__set(d, x, y); } stua_poproot(); return c; } default: if (stu__f[n] < 0) return stu__const(stu__f)[stu__f[n]]; assert(0); /* NOTREACHED */ // internal error! } return stua_nil; } int stb__stua_nesting; static stua_obj stu__funceval(stua_obj fo, stua_obj co) { stu__func *f = stu__pf(fo); stua_dict *context = stu__pd(co); int i,j; stua_obj p; short *tf = stu__f; // save previous function stua_dict *tc = stu__c; if (stu__flow == FLOW_error) return stua_nil; assert(stu__flow == FLOW_normal); stua_pushroot(fo); stua_pushroot(co); stu__consider_gc(stua_nil); while ((stb_uint) f->closure_source > 4) { // add data from closure to context stua_dict *e = (stua_dict *) stu__pd(f->f.closure_data); for (i=0; i < e->limit; ++i) if (e->table[i].k != STB_IEMPTY && e->table[i].k != STB_IDEL) if (stb_idict_add(context, e->table[i].k, e->table[i].v)) stu__size_allocs += 8; // use add so if it's already defined, we don't override it; that way // explicit parameters win over applied ones, and most recent applications // win over previous ones f = stu__pf(f->closure_source); } for (j=0, i=0; i < f->num_param; ++i) // if it doesn't already exist, add it from the numbered parameters if (stb_idict_add(context, f->param[i], stu__get(context, stu__int(j), stua_nil))) ++j; // @TODO: if (stu__get(context, stu__int(f->num_param+1)) != STUA_NO_VALUE) // error: too many parameters // @TODO: ditto too few parameters if (f->closure_source == 4) p = f->f.func(context); else { stu__f = f->code, stu__c = context; stu__f_obj = co; ++stb__stua_nesting; if (stu__f[1]) p = stu__eval(stu__f[1]); else p = stua_nil; --stb__stua_nesting; stu__f = tf, stu__c = tc; // restore previous function if (stu__flow == FLOW_return) { stu__flow = FLOW_normal; p = stu__flow_val; stu__flow_val = stua_nil; } } stua_poproot(); stua_poproot(); return p; } // Parser static int stu__tok; static stua_obj stu__tokval; static char *stu__curbuf, *stu__bufstart; static stb_matcher *stu__lex_matcher; static unsigned char stu__prec[ST__max_terminals], stu__end[ST__max_terminals]; static void stu__nexttoken(void) { int len; retry: stu__tok = stb_lex(stu__lex_matcher, stu__curbuf, &len); if (stu__tok == 0) return; switch(stu__tok) { case ST_white : stu__curbuf += len; goto retry; case T__none : stu__tok = *stu__curbuf; break; case ST_string: stu__tokval = make_string(stu__curbuf+1, len-2); break; case ST_id : stu__tokval = make_string(stu__curbuf, len); break; case ST_hex : stu__tokval = stu__makeint(strtol(stu__curbuf+2,NULL,16)); stu__tok = ST_number; break; case ST_decimal: stu__tokval = stu__makeint(strtol(stu__curbuf ,NULL,10)); stu__tok = ST_number; break; case ST_float : stu__tokval = stua_float((float) atof(stu__curbuf)) ; stu__tok = ST_number; break; case ST_char : stu__tokval = stu__curbuf[2] == '\\' ? stu__curbuf[3] : stu__curbuf[2]; if (stu__curbuf[3] == 't') stu__tokval = '\t'; if (stu__curbuf[3] == 'n') stu__tokval = '\n'; if (stu__curbuf[3] == 'r') stu__tokval = '\r'; stu__tokval = stu__makeint(stu__tokval); stu__tok = ST_number; break; } stu__curbuf += len; } static struct { int stu__tok; char *regex; } stu__lexemes[] = { ST_white , "([ \t\n\r]|/\\*(.|\n)*\\*/|//[^\r\n]*([\r\n]|$))+", ST_id , "[_a-zA-Z][_a-zA-Z0-9]*", ST_hex , "0x[0-9a-fA-F]+", ST_decimal, "[0-9]+[0-9]*", ST_float , "[0-9]+\\.?[0-9]*([eE][-+]?[0-9]+)?", ST_float , "\\.[0-9]+([eE][-+]?[0-9]+)?", ST_char , "c'(\\\\.|[^\\'])'", ST_string , "\"(\\\\.|[^\\\"\n\r])*\"", ST_string , "\'(\\\\.|[^\\\'\n\r])*\'", #define stua_key4(a,b,c,d) ST_##a, #a, ST_##b, #b, ST_##c, #c, ST_##d, #d, stua_key4(if,then,else,elseif) stua_key4(while,do,for,in) stua_key4(func,var,let,break) stua_key4(nil,true,false,end) stua_key4(return,continue,as,repeat) stua_key4(_frame,catch,catch,catch) ST_shl, "<<", ST_and, "&&", ST_eq, "==", ST_ge, ">=", ST_shr, ">>", ST_or , "||", ST_ne, "!=", ST_le, "<=", ST_shru,">>>", ST_into, "=>", T__none, ".", }; typedef struct { stua_obj *data; // constants being compiled short *code; // code being compiled stua_dict *locals; short *non_local_refs; } stu__comp_func; static stu__comp_func stu__pfunc; static stu__comp_func *func_stack = NULL; static void stu__push_func_comp(void) { stb_arr_push(func_stack, stu__pfunc); stu__pfunc.data = NULL; stu__pfunc.code = NULL; stu__pfunc.locals = stb_idict_new_size(16); stu__pfunc.non_local_refs = NULL; stb_arr_push(stu__pfunc.code, 0); // number of data items stb_arr_push(stu__pfunc.code, 1); // starting execution address } static void stu__pop_func_comp(void) { stb_arr_free(stu__pfunc.code); stb_arr_free(stu__pfunc.data); stb_idict_destroy(stu__pfunc.locals); stb_arr_free(stu__pfunc.non_local_refs); stu__pfunc = stb_arr_pop(func_stack); } // if an id is a reference to an outer lexical scope, this // function returns the "name" of it, and updates the stack // structures to make sure the names are propogated in. static int stu__nonlocal_id(stua_obj var_obj) { stua_obj dummy, var = var_obj; int i, n = stb_arr_len(func_stack), j,k; if (stb_idict_get_flag(stu__pfunc.locals, var, &dummy)) return 0; for (i=n-1; i > 1; --i) { if (stb_idict_get_flag(func_stack[i].locals, var, &dummy)) break; } if (i <= 1) return 0; // stu__compile_global_scope j = i; // need to access variable from j'th frame for (i=0; i < stb_arr_len(stu__pfunc.non_local_refs); ++i) if (stu__pfunc.non_local_refs[i] == j) return j-n; stb_arr_push(stu__pfunc.non_local_refs, j-n); // now make sure all the parents propogate it down for (k=n-1; k > 1; --k) { if (j-k >= 0) return j-n; // comes direct from this parent for(i=0; i < stb_arr_len(func_stack[k].non_local_refs); ++i) if (func_stack[k].non_local_refs[i] == j-k) return j-n; stb_arr_push(func_stack[k].non_local_refs, j-k); } assert (k != 1); return j-n; } static int stu__off(void) { return stb_arr_len(stu__pfunc.code); } static void stu__cc(int a) { assert(a >= -2000 && a < 5000); stb_arr_push(stu__pfunc.code, a); } static int stu__cc1(int a) { stu__cc(a); return stu__off()-1; } static int stu__cc2(int a, int b) { stu__cc(a); stu__cc(b); return stu__off()-2; } static int stu__cc3(int a, int b, int c) { if (a == '=') assert(c != 0); stu__cc(a); stu__cc(b); stu__cc(c); return stu__off()-3; } static int stu__cc4(int a, int b, int c, int d) { stu__cc(a); stu__cc(b); stu__cc(c); stu__cc(d); return stu__off()-4; } static int stu__cdv(stua_obj p) { int i; assert(p != STUA_NO_VALUE); for (i=0; i < stb_arr_len(stu__pfunc.data); ++i) if (stu__pfunc.data[i] == p) break; if (i == stb_arr_len(stu__pfunc.data)) stb_arr_push(stu__pfunc.data, p); return ~i; } static int stu__cdt(void) { int z = stu__cdv(stu__tokval); stu__nexttoken(); return z; } static int stu__seq(int a, int b) { return !a ? b : !b ? a : stu__cc3(STU__seq, a,b); } static char stu__comp_err_str[1024]; static int stu__comp_err_line; static int stu__err(char *str, ...) { va_list v; char *s = stu__bufstart; stu__comp_err_line = 1; while (s < stu__curbuf) { if (s[0] == '\n' || s[0] == '\r') { if (s[0]+s[1] == '\n' + '\r') ++s; ++stu__comp_err_line; } ++s; } va_start(v, str); vsprintf(stu__comp_err_str, str, v); va_end(v); return 0; } static int stu__accept(int p) { if (stu__tok != p) return 0; stu__nexttoken(); return 1; } static int stu__demand(int p) { if (stu__accept(p)) return 1; return stu__err("Didn't find expected stu__tok"); } static int stu__demandv(int p, stua_obj *val) { if (stu__tok == p || p==0) { *val = stu__tokval; stu__nexttoken(); return 1; } else return 0; } static int stu__expr(int p); int stu__nexpr(int p) { stu__nexttoken(); return stu__expr(p); } static int stu__statements(int once, int as); static int stu__parse_if(void) // parse both ST_if and ST_elseif { int b,c,a; a = stu__nexpr(1); if (!a) return 0; if (!stu__demand(ST_then)) return stu__err("expecting THEN"); b = stu__statements(0,0); if (!b) return 0; if (b == 1) b = -1; if (stu__tok == ST_elseif) { return stu__parse_if(); } else if (stu__accept(ST_else)) { c = stu__statements(0,0); if (!c) return 0; if (!stu__demand(ST_end)) return stu__err("expecting END after else clause"); return stu__cc4(ST_else, a, b, c); } else { if (!stu__demand(ST_end)) return stu__err("expecting END in if statement"); return stu__cc3(ST_if, a, b); } } int stu__varinit(int z, int in_globals) { int a,b; stu__nexttoken(); while (stu__demandv(ST_id, &b)) { if (!stb_idict_add(stu__pfunc.locals, b, 1)) if (!in_globals) return stu__err("Redefined variable %s.", stu__pw(b)->ptr); if (stu__accept('=')) { a = stu__expr(1); if (!a) return 0; } else a = stu__cdv(stua_nil); z = stu__seq(z, stu__cc3(ST_var, stu__cdv(b), a)); if (!stu__accept(',')) break; } return z; } static int stu__compile_unary(int z, int outparm, int require_inparm) { int op = stu__tok, a, b; stu__nexttoken(); if (outparm) { if (require_inparm || (stu__tok && stu__tok != ST_end && stu__tok != ST_else && stu__tok != ST_elseif && stu__tok !=';')) { a = stu__expr(1); if (!a) return 0; } else a = stu__cdv(stua_nil); b = stu__cc2(op, a); } else b = stu__cc1(op); return stu__seq(z,b); } static int stu__assign(void) { int z; stu__accept(ST_let); z = stu__expr(1); if (!z) return 0; if (stu__accept('=')) { int y,p = (z >= 0 ? stu__pfunc.code[z] : 0); if (z < 0 || (p != ST_id && p != '[')) return stu__err("Invalid lvalue in assignment"); y = stu__assign(); if (!y) return 0; z = stu__cc3('=', z, y); } return z; } static int stu__statements(int once, int stop_while) { int a,b, c, z=0; for(;;) { switch (stu__tok) { case ST_if : a = stu__parse_if(); if (!a) return 0; z = stu__seq(z, a); break; case ST_while : if (stop_while) return (z ? z:1); a = stu__nexpr(1); if (!a) return 0; if (stu__accept(ST_as)) c = stu__statements(0,0); else c = 0; if (!stu__demand(ST_do)) return stu__err("expecting DO"); b = stu__statements(0,0); if (!b) return 0; if (!stu__demand(ST_end)) return stu__err("expecting END"); if (b == 1) b = -1; z = stu__seq(z, stu__cc4(ST_while, a, b, c)); break; case ST_repeat : stu__nexttoken(); c = stu__statements(0,1); if (!c) return 0; if (!stu__demand(ST_while)) return stu__err("expecting WHILE"); a = stu__expr(1); if (!a) return 0; if (!stu__demand(ST_do)) return stu__err("expecting DO"); b = stu__statements(0,0); if (!b) return 0; if (!stu__demand(ST_end)) return stu__err("expecting END"); if (b == 1) b = -1; z = stu__seq(z, stu__cc4(ST_as, a, b, c)); break; case ST_catch : a = stu__nexpr(1); if (!a) return 0; z = stu__seq(z, stu__cc2(ST_catch, a)); break; case ST_var : z = stu__varinit(z,0); break; case ST_return : z = stu__compile_unary(z,1,1); break; case ST_continue:z = stu__compile_unary(z,0,0); break; case ST_break : z = stu__compile_unary(z,1,0); break; case ST_into : if (z == 0 && !once) return stu__err("=> cannot be first statement in block"); a = stu__nexpr(99); b = (a >= 0? stu__pfunc.code[a] : 0); if (a < 0 || (b != ST_id && b != '[')) return stu__err("Invalid lvalue on right side of =>"); z = stu__cc3('=', a, z); break; default : if (stu__end[stu__tok]) return once ? 0 : (z ? z:1); a = stu__assign(); if (!a) return 0; stu__accept(';'); if (stu__tok && !stu__end[stu__tok]) { if (a < 0) return stu__err("Constant has no effect"); if (stu__pfunc.code[a] != '(' && stu__pfunc.code[a] != '=') return stu__err("Expression has no effect"); } z = stu__seq(z, a); break; } if (!z) return 0; stu__accept(';'); if (once && stu__tok != ST_into) return z; } } static int stu__postexpr(int z, int p); static int stu__dictdef(int end, int *count) { int z,n=0,i,flags=0; short *dict=NULL; stu__nexttoken(); while (stu__tok != end) { if (stu__tok == ST_id) { stua_obj id = stu__tokval; stu__nexttoken(); if (stu__tok == '=') { flags |= 1; stb_arr_push(dict, stu__cdv(id)); z = stu__nexpr(1); if (!z) return 0; } else { z = stu__cc2(ST_id, stu__cdv(id)); z = stu__postexpr(z,1); if (!z) return 0; flags |= 2; stb_arr_push(dict, stu__cdv(stu__makeint(n++))); } } else { z = stu__expr(1); if (!z) return 0; flags |= 2; stb_arr_push(dict, stu__cdv(stu__makeint(n++))); } if (end != ')' && flags == 3) { z=stu__err("can't mix initialized and uninitialized defs"); goto done;} stb_arr_push(dict, z); if (!stu__accept(',')) break; } if (!stu__demand(end)) return stu__err(end == ')' ? "Expecting ) at end of function call" : "Expecting } at end of dictionary definition"); z = stu__cc2('{', stb_arr_len(dict)/2); for (i=0; i < stb_arr_len(dict); ++i) stu__cc(dict[i]); if (count) *count = n; done: stb_arr_free(dict); return z; } static int stu__comp_id(void) { int z,d; d = stu__nonlocal_id(stu__tokval); if (d == 0) return z = stu__cc2(ST_id, stu__cdt()); // access a non-local frame by naming it with the appropriate int assert(d < 0); z = stu__cdv(d); // relative frame # is the 'variable' in our local frame z = stu__cc2(ST_id, z); // now access that dictionary return stu__cc3('[', z, stu__cdt()); // now access the variable from that dir } static stua_obj stu__funcdef(stua_obj *id, stua_obj *func); static int stu__expr(int p) { int z; // unary switch (stu__tok) { case ST_number: z = stu__cdt(); break; case ST_string: z = stu__cdt(); break; // @TODO - string concatenation like C case ST_id : z = stu__comp_id(); break; case ST__frame: z = stu__cc1(ST__frame); stu__nexttoken(); break; case ST_func : z = stu__funcdef(NULL,NULL); break; case ST_if : z = stu__parse_if(); break; case ST_nil : z = stu__cdv(stua_nil); stu__nexttoken(); break; case ST_true : z = stu__cdv(stua_true); stu__nexttoken(); break; case ST_false : z = stu__cdv(stua_false); stu__nexttoken(); break; case '-' : z = stu__nexpr(99); if (z) z=stu__cc2(STU__negate,z); else return z; break; case '!' : z = stu__nexpr(99); if (z) z=stu__cc2('!',z); else return z; break; case '~' : z = stu__nexpr(99); if (z) z=stu__cc2('~',z); else return z; break; case '{' : z = stu__dictdef('}', NULL); break; default : return stu__err("Unexpected token"); case '(' : stu__nexttoken(); z = stu__statements(0,0); if (!stu__demand(')')) return stu__err("Expecting )"); } return stu__postexpr(z,p); } static int stu__postexpr(int z, int p) { int q; // postfix while (stu__tok == '(' || stu__tok == '[' || stu__tok == '.') { if (stu__accept('.')) { // MUST be followed by a plain identifier! use [] for other stuff if (stu__tok != ST_id) return stu__err("Must follow . with plain name; try [] instead"); z = stu__cc3('[', z, stu__cdv(stu__tokval)); stu__nexttoken(); } else if (stu__accept('[')) { while (stu__tok != ']') { int r = stu__expr(1); if (!r) return 0; z = stu__cc3('[', z, r); if (!stu__accept(',')) break; } if (!stu__demand(']')) return stu__err("Expecting ]"); } else { int n, p = stu__dictdef(')', &n); if (!p) return 0; #if 0 // this is incorrect! if (z > 0 && stu__pfunc.code[z] == ST_id) { stua_obj q = stu__get(stu__globaldict, stu__pfunc.data[-stu__pfunc.code[z+1]-1], stua_nil); if (stu__checkt(STU___function, q)) if ((stu__pf(q))->num_param != n) return stu__err("Incorrect number of parameters"); } #endif z = stu__cc3('(', z, p); } } // binop - this implementation taken from lcc for (q=stu__prec[stu__tok]; q >= p; --q) { while (stu__prec[stu__tok] == q) { int o = stu__tok, y = stu__nexpr(p+1); if (!y) return 0; z = stu__cc3(o,z,y); } } return z; } static stua_obj stu__finish_func(stua_obj *param, int start) { int n, size; stu__func *f = (stu__func *) malloc(sizeof(*f)); f->closure_source = 0; f->num_param = stb_arr_len(param); f->param = (int *) stb_copy(param, f->num_param * sizeof(*f->param)); size = stb_arr_storage(stu__pfunc.code) + stb_arr_storage(stu__pfunc.data) + sizeof(*f) + 8; f->f.store = malloc(stb_arr_storage(stu__pfunc.code) + stb_arr_storage(stu__pfunc.data)); f->code = (short *) ((char *) f->f.store + stb_arr_storage(stu__pfunc.data)); memcpy(f->code, stu__pfunc.code, stb_arr_storage(stu__pfunc.code)); f->code[1] = start; f->code[0] = stb_arr_len(stu__pfunc.data); for (n=0; n < f->code[0]; ++n) ((stua_obj *) f->code)[-1-n] = stu__pfunc.data[n]; return stu__makeobj(STU___function, f, size, 0); } static int stu__funcdef(stua_obj *id, stua_obj *result) { int n,z=0,i,q; stua_obj *param = NULL; short *nonlocal; stua_obj v,f=stua_nil; assert(stu__tok == ST_func); stu__nexttoken(); if (id) { if (!stu__demandv(ST_id, id)) return stu__err("Expecting function name"); } else stu__accept(ST_id); if (!stu__demand('(')) return stu__err("Expecting ( for function parameter"); stu__push_func_comp(); while (stu__tok != ')') { if (!stu__demandv(ST_id, &v)) { z=stu__err("Expecting parameter name"); goto done; } stb_idict_add(stu__pfunc.locals, v, 1); if (stu__tok == '=') { n = stu__nexpr(1); if (!n) { z=0; goto done; } z = stu__seq(z, stu__cc3(STU__defaultparm, stu__cdv(v), n)); } else stb_arr_push(param, v); if (!stu__accept(',')) break; } if (!stu__demand(')')) { z=stu__err("Expecting ) at end of parameter list"); goto done; } n = stu__statements(0,0); if (!n) { z=0; goto done; } if (!stu__demand(ST_end)) { z=stu__err("Expecting END at end of function"); goto done; } if (n == 1) n = 0; n = stu__seq(z,n); f = stu__finish_func(param, n); if (result) { *result = f; z=1; stu__pop_func_comp(); } else { nonlocal = stu__pfunc.non_local_refs; stu__pfunc.non_local_refs = NULL; stu__pop_func_comp(); z = stu__cdv(f); if (nonlocal) { // build a closure with references to the needed frames short *initcode = NULL; for (i=0; i < stb_arr_len(nonlocal); ++i) { int k = nonlocal[i], p; stb_arr_push(initcode, stu__cdv(k)); if (k == -1) p = stu__cc1(ST__frame); else { p = stu__cdv(stu__makeint(k+1)); p = stu__cc2(ST_id, p); } stb_arr_push(initcode, p); } q = stu__cc2('{', stb_arr_len(nonlocal)); for (i=0; i < stb_arr_len(initcode); ++i) stu__cc(initcode[i]); z = stu__cc3('+', z, q); stb_arr_free(initcode); } stb_arr_free(nonlocal); } done: stb_arr_free(param); if (!z) stu__pop_func_comp(); return z; } static int stu__compile_global_scope(void) { stua_obj o; int z=0; stu__push_func_comp(); while (stu__tok != 0) { if (stu__tok == ST_func) { stua_obj id, f; if (!stu__funcdef(&id,&f)) goto error; stu__set(stu__globaldict, id, f); } else if (stu__tok == ST_var) { z = stu__varinit(z,1); if (!z) goto error; } else { int y = stu__statements(1,0); if (!y) goto error; z = stu__seq(z,y); } stu__accept(';'); } o = stu__finish_func(NULL, z); stu__pop_func_comp(); o = stu__funceval(o, stua_globals); // initialize stu__globaldict if (stu__flow == FLOW_error) printf("Error: %s\n", ((stu__wrapper *) stu__ptr(stu__flow_val))->ptr); return 1; error: stu__pop_func_comp(); return 0; } stua_obj stu__myprint(stua_dict *context) { stua_obj x = stu__get(context, stua_string("x"), stua_nil); if ((x & 1) == stu__float_tag) printf("%f", stu__getfloat(x)); else if (stu__tag(x) == stu__int_tag) printf("%d", stu__int(x)); else { stu__wrapper *s = stu__pw(x); if (s->type == STU___string || s->type == STU___error) printf("%s", s->ptr); else if (s->type == STU___dict) printf("{{dictionary}}"); else if (s->type == STU___function) printf("[[function]]"); else printf("[[ERROR:%s]]", s->ptr); } return x; } void stua_init(void) { if (!stu__globaldict) { int i; stua_obj s; stu__func *f; stu__prec[ST_and] = stu__prec[ST_or] = 1; stu__prec[ST_eq ] = stu__prec[ST_ne] = stu__prec[ST_le] = stu__prec[ST_ge] = stu__prec['>' ] = stu__prec['<'] = 2; stu__prec[':'] = 3; stu__prec['&'] = stu__prec['|'] = stu__prec['^'] = 4; stu__prec['+'] = stu__prec['-'] = 5; stu__prec['*'] = stu__prec['/'] = stu__prec['%'] = stu__prec[ST_shl]= stu__prec[ST_shr]= stu__prec[ST_shru]= 6; stu__end[')'] = stu__end[ST_end] = stu__end[ST_else] = 1; stu__end[ST_do] = stu__end[ST_elseif] = 1; stu__float_init(); stu__lex_matcher = stb_lex_matcher(); for (i=0; i < sizeof(stu__lexemes)/sizeof(stu__lexemes[0]); ++i) stb_lex_item(stu__lex_matcher, stu__lexemes[i].regex, stu__lexemes[i].stu__tok); stu__globaldict = stb_idict_new_size(64); stua_globals = stu__makeobj(STU___dict, stu__globaldict, 0,0); stu__strings = stb_sdict_new(0); stu__curbuf = stu__bufstart = "func _print(x) end\n" "func print()\n var x=0 while _frame[x] != nil as x=x+1 do _print(_frame[x]) end end\n"; stu__nexttoken(); if (!stu__compile_global_scope()) printf("Compile error in line %d: %s\n", stu__comp_err_line, stu__comp_err_str); s = stu__get(stu__globaldict, stua_string("_print"), stua_nil); if (stu__tag(s) == stu__ptr_tag && stu__ptr(s)->type == STU___function) { f = stu__pf(s); free(f->f.store); f->closure_source = 4; f->f.func = stu__myprint; f->code = NULL; } } } void stua_uninit(void) { if (stu__globaldict) { stb_idict_remove_all(stu__globaldict); stb_arr_setlen(stu__gc_root_stack, 0); stua_gc(1); stb_idict_destroy(stu__globaldict); stb_sdict_delete(stu__strings); stb_matcher_free(stu__lex_matcher); stb_arr_free(stu__gc_ptrlist); stb_arr_free(func_stack); stb_arr_free(stu__gc_root_stack); stu__globaldict = NULL; } } void stua_run_script(char *s) { stua_init(); stu__curbuf = stu__bufstart = s; stu__nexttoken(); stu__flow = FLOW_normal; if (!stu__compile_global_scope()) printf("Compile error in line %d: %s\n", stu__comp_err_line, stu__comp_err_str); stua_gc(1); } #endif // STB_DEFINE #endif // STB_STUA #undef STB_EXTERN #endif // STB_INCLUDE_STB_H