| 1 | #define _GNU_SOURCE |
|---|---|
| 2 | #include <stdio.h> |
| 3 | #include <stdarg.h> |
| 4 | #include <stdlib.h> |
| 5 | |
| 6 | int vasprintf(char **s, const char *fmt, va_list ap) |
| 7 | { |
| 8 | va_list ap2; |
| 9 | va_copy(ap2, ap); |
| 10 | int l = vsnprintf(0, 0, fmt, ap2); |
| 11 | va_end(ap2); |
| 12 | |
| 13 | if (l<0 || !(*s=malloc(l+1U))) return -1; |
| 14 | return vsnprintf(*s, l+1U, fmt, ap); |
| 15 | } |
| 16 |