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_asprintf(char ** __restrict__ ret,
 9                     const char * __restrict__ format,
10                     ...) {
11  va_list ap;
12  int len;
13  va_start(ap,format);
14  /* Get Length */
15  len = __mingw_vsnprintf(NULL,0,format,ap);
16  if (len < 0) goto _end;
17  /* +1 for \0 terminator. */
18  *ret = malloc(len + 1);
19  /* Check malloc fail*/
20  if (!*ret) {
21    len = -1;
22    goto _end;
23  }
24  /* Write String */
25  __mingw_vsnprintf(*ret,len+1,format,ap);
26  /* Terminate explicitly */
27  (*ret)[len] = '\0';
28  _end:
29  va_end(ap);
30  return len;
31}
32