1#define _GNU_SOURCE
 2#define __CRT__NO_INLINE
 3
 4#include <stdio.h>
 5#include <stdlib.h>
 6#include <stdarg.h>
 7
 8int __mingw_vasprintf(char ** __restrict__ ret,
 9                      const char * __restrict__ format,
10                      va_list ap) {
11  int len;
12  /* Get Length */
13  len = __mingw_vsnprintf(NULL,0,format,ap);
14  if (len < 0) return -1;
15  /* +1 for \0 terminator. */
16  *ret = malloc(len + 1);
17  /* Check malloc fail*/
18  if (!*ret) return -1;
19  /* Write String */
20  __mingw_vsnprintf(*ret,len+1,format,ap);
21  /* Terminate explicitly */
22  (*ret)[len] = '\0';
23  return len;
24}
25