/*

  File: unquote.c

  Copyright (C) 2003 Andreas Gruenbacher <a.gruenbacher@bestbits.at>

  This program is free software; you can redistribute it and/or modify it under

  the terms of the GNU Lesser General Public License as published by the

  Free Software Foundation; either version 2.1 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 Lesser General Public

  License for more details.

  You should have received a copy of the GNU Lesser General Public

  License along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/

#include "config.h"

#include <stdio.h>

#include <stdlib.h>

#include <ctype.h>

#include "misc.h"

char *__acl_unquote(char *str)

{

	unsigned char *s, *t;

	if (!str)

		return str;

	for (s = (unsigned char *)str; *s != '\0'; s++)

		if (*s == '\\')

			break;

	if (*s == '\0')

		return str;

#define isoctal(c) \

	((c) >= '0' && (c) <= '7')

	t = s;

	do {

		if (*s == '\\' &&

		    isoctal(*(s+1)) && isoctal(*(s+2)) && isoctal(*(s+3))) {

			*t++ = ((*(s+1) - '0') << 6) +

			       ((*(s+2) - '0') << 3) +

			       ((*(s+3) - '0')     );

			s += 3;

		} else if (*s == '\\' && *(s+1) == '\\') {

			*t++ = *s++;

		} else

			*t++ = *s;

	} while (*s++ != '\0');

	return str;

}