/*
 * version.c - implementation of the elf_version(3) function.
 * Copyright (C) 1995 - 1998, 2007 Michael Riepe
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include <private.h>

#ifndef lint
static const char rcsid[] = "@(#) $Id: version.c,v 1.8 2008/05/23 08:15:35 michael Exp $";
#endif /* lint */

unsigned
elf_version(unsigned ver) {
    const char *s;
    unsigned tmp;

    if ((s = getenv("LIBELF_SANITY_CHECKS"))) {
	_elf_sanity_checks = (int)strtol(s, (char**)NULL, 0);
    }
    if (ver == EV_NONE) {
	return EV_CURRENT;
    }
    if (!valid_version(ver)) {
	seterr(ERROR_UNKNOWN_VERSION);
	return EV_NONE;
    }
    tmp = _elf_version == EV_NONE ? EV_CURRENT : _elf_version;
    _elf_version = ver;
    return tmp;
}