git: 9front

ref: f4e7db8080c78e41d659538a86a43d59fc9eaddd
dir: /sys/src/ape/lib/ap/stdio/vsnprintf.c/

View raw version 
/*
 * pANS stdio -- vsnprintf
 */
#define _C99_SNPRINTF_EXTENSION

#include "iolib.h"

int vsnprintf(char *buf, size_t nbuf, const char *fmt, va_list args){
	int n;
	FILE *f=_IO_sopenw();
	if(f==NULL)
		return 0;
	setvbuf(f, buf, _IOFBF, nbuf);
	n=vfprintf(f, fmt, args);
	_IO_sclose(f);
	return n;
}