| #define _GNU_SOURCE | |
| #include <stdio.h> | |
| #include <stdarg.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); | |
| } |