/*
 * This file is part of the UCB release of Plan 9. It is subject to the license
 * terms in the LICENSE file found in the top-level directory of this
 * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
 * part of the UCB release of Plan 9, including this file, may be copied,
 * modified, propagated, or distributed except according to the terms contained
 * in the LICENSE file.
 */

#include <u.h>
#include <libc.h>
#include "fmtdef.h"

/*
 * generic routine for flushing a formatting buffer
 * to a file descriptor
 */
int
_fmtFdFlush(Fmt *f)
{
	int n;

	n = (char*)f->to - (char*)f->start;
	if(n && write((int)(uintptr_t)f->farg, f->start, n) != n)
		return 0;
	f->to = f->start;
	return 1;
}

int
jehanne_vfprint(int fd, const char *fmt, va_list args)
{
	Fmt f;
	char buf[256];
	int n;

	jehanne_fmtfdinit(&f, fd, buf, sizeof(buf));
	//f.args = args;
	va_copy(f.args,args);
	n = jehanne_dofmt(&f, fmt);
	va_end(f.args);
	if(n > 0 && _fmtFdFlush(&f) == 0)
		return -1;
	return n;
}
