mirror of https://github.com/arendst/Tasmota.git
282 lines
8.0 KiB
C
282 lines
8.0 KiB
C
/********************************************************************
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* Tasmota lib
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*
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* To use: `import re`
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*
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* Regex using re1.5
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*******************************************************************/
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#include "be_constobj.h"
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#include "be_mem.h"
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#include "be_object.h"
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#include "../../re1.5/re1.5.h"
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/********************************************************************
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# Berry skeleton for `re` module
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#
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class re_pattern
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var _p # comobj containing the compiled bytecode for the pattern
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def search() end
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def match() end
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def split() end
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end
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re = module("re")
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re.compile = def (regex_str) end # native
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re.match = def (regex_str, str) end # native
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re.search = def (regex_str, str) end # native
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re.split = def (regex_str, str) end # native
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*******************************************************************/
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extern const bclass be_class_re_pattern;
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// Native functions be_const_func()
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// Berry: `re.compile(pattern:string) -> instance(be_pattern)`
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int be_re_compile(bvm *vm) {
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int32_t argc = be_top(vm); // Get the number of arguments
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if (argc >= 1 && be_isstring(vm, 1)) {
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const char * regex_str = be_tostring(vm, 1);
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int sz = re1_5_sizecode(regex_str);
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if (sz < 0) {
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be_raise(vm, "internal_error", "error in regex");
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}
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ByteProg *code = be_os_malloc(sizeof(ByteProg) + sz);
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int ret = re1_5_compilecode(code, regex_str);
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if (ret != 0) {
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be_raise(vm, "internal_error", "error in regex");
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}
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be_pushntvclass(vm, &be_class_re_pattern);
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be_call(vm, 0);
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be_newcomobj(vm, code, &be_commonobj_destroy_generic);
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be_setmember(vm, -2, "_p");
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be_pop(vm, 1);
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be_return(vm);
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}
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be_raise(vm, "type_error", NULL);
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}
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// pushes either a list if matched, else `nil`
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// return index of next offset, or -1 if not found
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const char *be_re_match_search_run(bvm *vm, ByteProg *code, const char *hay, bbool is_anchored) {
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Subject subj = {hay, hay + strlen(hay)};
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int sub_els = (code->sub + 1) * 2;
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const char *sub[sub_els];
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if (!re1_5_recursiveloopprog(code, &subj, sub, sub_els, is_anchored)) {
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be_pushnil(vm);
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return NULL; // no match
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}
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be_newobject(vm, "list");
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int k;
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for(k = sub_els; k > 0; k--)
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if(sub[k-1])
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break;
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for (int i = 0; i < k; i += 2) {
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be_pushnstring(vm, sub[i], sub[i+1] - sub[i]);
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be_data_push(vm, -2);
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be_pop(vm, 1);
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}
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be_pop(vm, 1); // remove list
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return sub[1];
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}
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int be_re_match_search(bvm *vm, bbool is_anchored) {
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int32_t argc = be_top(vm); // Get the number of arguments
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if (argc >= 2 && be_isstring(vm, 1) && be_isstring(vm, 2)) {
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const char * regex_str = be_tostring(vm, 1);
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const char * hay = be_tostring(vm, 2);
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int sz = re1_5_sizecode(regex_str);
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if (sz < 0) {
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be_raise(vm, "internal_error", "error in regex");
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}
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ByteProg *code = be_os_malloc(sizeof(ByteProg) + sz);
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int ret = re1_5_compilecode(code, regex_str);
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if (ret != 0) {
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be_raise(vm, "internal_error", "error in regex");
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}
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be_re_match_search_run(vm, code, hay, is_anchored);
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be_return(vm);
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}
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be_raise(vm, "type_error", NULL);
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}
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int be_re_match_search_all(bvm *vm, bbool is_anchored) {
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int32_t argc = be_top(vm); // Get the number of arguments
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if (argc >= 2 && be_isstring(vm, 1) && be_isstring(vm, 2)) {
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const char * regex_str = be_tostring(vm, 1);
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const char * hay = be_tostring(vm, 2);
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int limit = -1;
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if (argc >= 3) {
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limit = be_toint(vm, 3);
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}
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int sz = re1_5_sizecode(regex_str);
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if (sz < 0) {
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be_raise(vm, "internal_error", "error in regex");
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}
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ByteProg *code = be_os_malloc(sizeof(ByteProg) + sz);
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int ret = re1_5_compilecode(code, regex_str);
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if (ret != 0) {
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be_raise(vm, "internal_error", "error in regex");
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}
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be_newobject(vm, "list");
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for (int i = limit; i != 0 && hay != NULL; i--) {
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hay = be_re_match_search_run(vm, code, hay, is_anchored);
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if (hay != NULL) {
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be_data_push(vm, -2); // add sub list to list
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}
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be_pop(vm, 1);
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}
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be_pop(vm, 1);
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be_return(vm);
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}
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be_raise(vm, "type_error", NULL);
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}
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// Berry: `re.match(value:int | s:string) -> nil`
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int be_re_match(bvm *vm) {
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return be_re_match_search(vm, btrue);
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}
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// Berry: `re.search(value:int | s:string) -> nil`
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int be_re_search(bvm *vm) {
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return be_re_match_search(vm, bfalse);
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}
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// Berry: `re.search_all`
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int be_re_match_all(bvm *vm) {
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return be_re_match_search_all(vm, btrue);
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}
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// Berry: `re.search_all`
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int be_re_search_all(bvm *vm) {
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return be_re_match_search_all(vm, bfalse);
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}
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// Berry: `re_pattern.search(s:string) -> list(string)`
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int re_pattern_search(bvm *vm) {
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int32_t argc = be_top(vm); // Get the number of arguments
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if (argc >= 2 && be_isstring(vm, 2)) {
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const char * hay = be_tostring(vm, 2);
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be_getmember(vm, 1, "_p");
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ByteProg * code = (ByteProg*) be_tocomptr(vm, -1);
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be_re_match_search_run(vm, code, hay, bfalse);
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be_return(vm);
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}
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be_raise(vm, "type_error", NULL);
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}
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// Berry: `re_pattern.match(s:string) -> list(string)`
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int re_pattern_match(bvm *vm) {
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int32_t argc = be_top(vm); // Get the number of arguments
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if (argc >= 2 && be_isstring(vm, 2)) {
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const char * hay = be_tostring(vm, 2);
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be_getmember(vm, 1, "_p");
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ByteProg * code = (ByteProg*) be_tocomptr(vm, -1);
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be_re_match_search_run(vm, code, hay, btrue);
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be_return(vm);
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}
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be_raise(vm, "type_error", NULL);
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}
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int re_pattern_split_run(bvm *vm, ByteProg *code, const char *hay, int split_limit) {
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Subject subj = {hay, hay + strlen(hay)};
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int sub_els = (code->sub + 1) * 2;
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const char *sub[sub_els];
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be_newobject(vm, "list");
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while (1) {
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if (split_limit == 0 || !re1_5_recursiveloopprog(code, &subj, sub, sub_els, bfalse)) {
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be_pushnstring(vm, subj.begin, subj.end - subj.begin);
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be_data_push(vm, -2);
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be_pop(vm, 1);
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break;
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}
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if (sub[0] == NULL || sub[1] == NULL || sub[0] == sub[1]) {
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be_raise(vm, "internal_error", "can't match");
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}
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be_pushnstring(vm, subj.begin, sub[0] - subj.begin);
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be_data_push(vm, -2);
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be_pop(vm, 1);
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subj.begin = sub[1];
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split_limit--;
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}
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be_pop(vm, 1); // remove list
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be_return(vm); // return list object
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}
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// Berry: `re_pattern.split(s:string [, split_limit:int]) -> list(string)`
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int re_pattern_split(bvm *vm) {
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int32_t argc = be_top(vm); // Get the number of arguments
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if (argc >= 2 && be_isstring(vm, 2)) {
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int split_limit = -1;
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if (argc >= 3) {
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split_limit = be_toint(vm, 3);
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}
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const char * hay = be_tostring(vm, 2);
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be_getmember(vm, 1, "_p");
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ByteProg * code = (ByteProg*) be_tocomptr(vm, -1);
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return re_pattern_split_run(vm, code, hay, split_limit);
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}
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be_raise(vm, "type_error", NULL);
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}
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// Berry: `re.split(pattern:string, s:string [, split_limit:int]) -> list(string)`
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int be_re_split(bvm *vm) {
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int32_t argc = be_top(vm); // Get the number of arguments
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if (argc >= 2 && be_isstring(vm, 1) && be_isstring(vm, 2)) {
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const char * regex_str = be_tostring(vm, 1);
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const char * hay = be_tostring(vm, 2);
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int split_limit = -1;
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if (argc >= 3) {
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split_limit = be_toint(vm, 3);
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}
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int sz = re1_5_sizecode(regex_str);
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if (sz < 0) {
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be_raise(vm, "internal_error", "error in regex");
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}
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ByteProg *code = be_os_malloc(sizeof(ByteProg) + sz);
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int ret = re1_5_compilecode(code, regex_str);
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if (ret != 0) {
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be_raise(vm, "internal_error", "error in regex");
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}
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return re_pattern_split_run(vm, code, hay, split_limit);
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}
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be_raise(vm, "type_error", NULL);
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}
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#include "../generate/be_fixed_re.h"
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#include "../generate/be_fixed_be_class_re_pattern.h"
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/*
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@const_object_info_begin
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module re (scope: global) {
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compile, func(be_re_compile)
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search, func(be_re_search)
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searchall, func(be_re_search_all)
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match, func(be_re_match)
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matchall, func(be_re_match_all)
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split, func(be_re_split)
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}
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@const_object_info_end
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@const_object_info_begin
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class be_class_re_pattern (scope: global, name: re_pattern) {
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_p, var
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search, func(re_pattern_search)
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match, func(re_pattern_match)
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split, func(re_pattern_split)
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}
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@const_object_info_end */
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