132 lines
4.2 KiB
C
132 lines
4.2 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/mpconfig.h"
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#include <stdint.h>
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#include <string.h>
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#include <stdarg.h>
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#include "py/obj.h"
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#include "py/mphal.h"
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#if MICROPY_PY_BUILTINS_FLOAT
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#include "py/formatfloat.h"
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#endif
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#if MICROPY_DEBUG_PRINTERS
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int DEBUG_printf(const char *fmt, ...) {
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va_list ap;
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va_start(ap, fmt);
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int ret = mp_vprintf(MICROPY_DEBUG_PRINTER, fmt, ap);
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va_end(ap);
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return ret;
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}
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#endif
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#if MICROPY_USE_INTERNAL_PRINTF
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#undef putchar // Some stdlibs have a #define for putchar
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int printf(const char *fmt, ...);
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int vprintf(const char *fmt, va_list ap);
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int putchar(int c);
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int puts(const char *s);
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int vsnprintf(char *str, size_t size, const char *fmt, va_list ap);
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int snprintf(char *str, size_t size, const char *fmt, ...);
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int printf(const char *fmt, ...) {
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va_list ap;
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va_start(ap, fmt);
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int ret = mp_vprintf(MICROPY_INTERNAL_PRINTF_PRINTER, fmt, ap);
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va_end(ap);
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return ret;
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}
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int vprintf(const char *fmt, va_list ap) {
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return mp_vprintf(MICROPY_INTERNAL_PRINTF_PRINTER, fmt, ap);
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}
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// need this because gcc optimises printf("%c", c) -> putchar(c), and printf("a") -> putchar('a')
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int putchar(int c) {
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char chr = c;
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MICROPY_INTERNAL_PRINTF_PRINTER->print_strn(MICROPY_INTERNAL_PRINTF_PRINTER->data, &chr, 1);
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return chr;
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}
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// need this because gcc optimises printf("string\n") -> puts("string")
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int puts(const char *s) {
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MICROPY_INTERNAL_PRINTF_PRINTER->print_strn(MICROPY_INTERNAL_PRINTF_PRINTER->data, s, strlen(s));
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return putchar('\n'); // will return 10, which is >0 per specs of puts
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}
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typedef struct _strn_print_env_t {
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char *cur;
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size_t remain;
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} strn_print_env_t;
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STATIC void strn_print_strn(void *data, const char *str, size_t len) {
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strn_print_env_t *strn_print_env = data;
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if (len > strn_print_env->remain) {
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len = strn_print_env->remain;
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}
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memcpy(strn_print_env->cur, str, len);
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strn_print_env->cur += len;
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strn_print_env->remain -= len;
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}
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#if defined(__GNUC__) && !defined(__clang__) && __GNUC__ < 9
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// uClibc requires this alias to be defined, or there may be link errors
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// when linkings against it statically.
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// GCC 9 gives a warning about missing attributes so it's excluded until
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// uClibc+GCC9 support is needed.
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int __GI_vsnprintf(char *str, size_t size, const char *fmt, va_list ap) __attribute__((weak, alias("vsnprintf")));
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#endif
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int vsnprintf(char *str, size_t size, const char *fmt, va_list ap) {
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strn_print_env_t strn_print_env = {str, size};
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mp_print_t print = {&strn_print_env, strn_print_strn};
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int len = mp_vprintf(&print, fmt, ap);
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// add terminating null byte
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if (size > 0) {
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if (strn_print_env.remain == 0) {
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strn_print_env.cur[-1] = 0;
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} else {
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strn_print_env.cur[0] = 0;
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}
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}
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return len;
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}
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int snprintf(char *str, size_t size, const char *fmt, ...) {
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va_list ap;
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va_start(ap, fmt);
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int ret = vsnprintf(str, size, fmt, ap);
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va_end(ap);
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return ret;
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}
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#endif // MICROPY_USE_INTERNAL_PRINTF
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