#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include "fileutil.h"

int setvbuf(FILE * restrict fp, char * restrict buf, int mode, size_t size)
{
	if(fp->bufmode != _IONBF || fp->buf) {
		fflush(fp);
	}

	__fp_remove_buffer(fp);
	fp->bufmode = _IONBF;

	if(mode == _IONBF)
		return 0;

	if(!__fp_set_buffer(fp, buf, size))
		return -1;

	fp->bufmode = mode;
	return 0;
}