/*
 *	aegis - project change supervisor
 *	Copyright (C) 2001, 2003 Peter Miller;
 *	All rights reserved.
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 *
 *	This program is distributed in the hope that it will be useful,
 *	but WITHOUT ANY WARRANTY; without even the implied warranty of
 *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *	GNU General Public License for more details.
 *
 *	You should have received a copy of the GNU General Public License
 *	along with this program; if not, write to the Free Software
 *	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 *
 * MANIFEST: functions to manipulate file_fingerps
 */

#include <ac/errno.h>
#include <ac/string.h>

#include <fp/combined.h>
#include <glue.h>
#include <os.h>


int
file_fingerprint(char *path, char *buf, int max)
{
	fingerprint_ty	*fp;
	int		result;
	int		len;
	char		tmp[1000];

	os_interrupt_cope();
	fp = fingerprint_new(&fp_combined);
	result = fingerprint_file_sum(fp, path, tmp);
	if (result < 0)
	{
		int err = errno;
		fingerprint_delete(fp);
		errno = err;
		return -1;
	}
	len = strlen(tmp);
	if (len > max)
		len = max;
	memcpy(buf, tmp, len);
	fingerprint_delete(fp);
	return len;
}
