zig/lib/libc/musl/src/stdio/vasprintf.c
Andrew Kelley 49d1a4c562 move lib dirs to lib subdir
also start prefering NtDll API. so far:
 * NtQueryInformationFile
 * NtClose

adds a performance workaround for windows unicode conversion. but that
should probably be removed before merging
2019-07-15 17:54:50 -04:00

16 lines
302 B
C
Vendored

#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);
}