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/*
* Copyright (C) 2000-2021 Free Software Foundation, Inc.
*
* This file is part of LIBTASN1.
*
* The LIBTASN1 library 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 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h> /* for strverscmp */
#include "libtasn1.h"
/**
* asn1_check_version:
* @req_version: Required version number, or %NULL.
*
* Check that the version of the library is at minimum the
* requested one and return the version string; return %NULL if the
* condition is not satisfied. If a %NULL is passed to this function,
* no check is done, but the version string is simply returned.
*
* See %ASN1_VERSION for a suitable @req_version string.
*
* Returns: Version string of run-time library, or %NULL if the
* run-time library does not meet the required version number.
*/
const char *
asn1_check_version (const char *req_version)
{
if (!req_version || strverscmp (req_version, ASN1_VERSION) <= 0)
return ASN1_VERSION;
return NULL;
}
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