usr/klibc/vasprintf.c

/*
 * vasprintf.c
 */

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>

int vasprintf(char **bufp, const char *format, va_list ap)
{
	va_list ap1;
	int bytes;
	char *p;

	va_copy(ap1, ap);

	bytes = vsnprintf(NULL, 0, format, ap1) + 1;
	va_end(ap1);

	*bufp = p = malloc(bytes);
	if (!p)
		return -1;

	return vsnprintf(p, bytes, format, ap);
}