diff options
Diffstat (limited to 'util.c')
| -rw-r--r-- | util.c | 20 |
1 files changed, 20 insertions, 0 deletions
@@ -222,6 +222,26 @@ static void str_cpy(char *dst, size_t dst_sz, char const *src) { #define strbuf_cpy(dst, src) str_cpy(dst, sizeof dst, src) #define strbuf_cat(dst, src) str_cat(dst, sizeof dst, src) + +char *a_sprintf(PRINTF_FORMAT_STRING const char *fmt, ...) ATTRIBUTE_PRINTF(1, 2); +char *a_sprintf(const char *fmt, ...) { + // idk if you can always just pass NULL to vsnprintf + va_list args; + char fakebuf[2] = {0}; + va_start(args, fmt); + int ret = vsnprintf(fakebuf, 1, fmt, args); + va_end(args); + + if (ret < 0) return NULL; // bad format or something + u32 n = (u32)ret; + char *str = calloc(1, n + 1); + va_start(args, fmt); + vsnprintf(str, n + 1, fmt, args); + va_end(args); + return str; +} + + // advances str to the start of the next UTF8 character static void utf8_next_char_const(char const **str) { if (**str) { |