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Diffstat (limited to 'gnulib/lib/check-version.c')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/lib/check-version.c | 44 |
2 files changed, 44 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 4fc10daa05477586fea99b6b3ca02a87d1102fa diff --git a/gnulib/lib/check-version.c b/gnulib/lib/check-version.c new file mode 100644 index 00000000..740f7c58 --- /dev/null +++ b/gnulib/lib/check-version.c @@ -0,0 +1,44 @@ +/* check-version.h --- Check version string compatibility. + Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2008, + 2009, 2010 Free Software Foundation, Inc. + + 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, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +/* Written by Simon Josefsson. This interface is influenced by + gcry_check_version from Werner Koch's Libgcrypt. Paul Eggert + suggested the use of strverscmp to simplify implementation. */ + +#include <config.h> + +#include <stddef.h> +#include <string.h> + +/* Get specification. */ +#include "check-version.h" + +/* Check that the version of the library (i.e., the CPP symbol VERSION) + * is at minimum the requested one in REQ_VERSION (typically found in + * a header file) 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. + */ +const char * +check_version (const char *req_version) +{ + if (!req_version || strverscmp (req_version, VERSION) <= 0) + return VERSION; + + return NULL; +} |