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Jim Meyering
5bf19ea156
* lib/check-version.c (check_version): Likewise. * lib/javacomp.c (compile_java_class): Likewise. * m4/glob.m4: Likewise.
47 lines
1.7 KiB
C
47 lines
1.7 KiB
C
/* check-version.h --- Check version string compatibility.
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Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free
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Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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/* Written by Simon Josefsson. This interface is influenced by
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gcry_check_version from Werner Koch's Libgcrypt. Paul Eggert
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suggested the use of strverscmp to simplify implementation. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stddef.h>
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#include <strverscmp.h>
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/* Get specification. */
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#include "check-version.h"
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/* Check that the version of the library (i.e., the CPP symbol VERSION)
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* is at minimum the requested one in REQ_VERSION (typically found in
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* a header file) and return the version string. Return NULL if the
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* condition is not satisfied. If a NULL is passed to this function,
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* no check is done, but the version string is simply returned.
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*/
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const char *
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check_version (const char *req_version)
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{
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if (!req_version || strverscmp (req_version, VERSION) <= 0)
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return VERSION;
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return NULL;
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}
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