#define _GNU_SOURCE | |
#include <stdarg.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
int vasprintf(char** s, const char* fmt, va_list ap) { | |
va_list ap2; | |
va_copy(ap2, ap); | |
int l = vsnprintf(0, 0, fmt, ap2); | |
va_end(ap2); | |
if (l < 0 || !(*s = malloc(l + 1U))) | |
return -1; | |
return vsnprintf(*s, l + 1U, fmt, ap); | |
} |