subversion/libsvn_subr/version.c

   1 /*
   2  * version.c:  library version number and utilities
   3  *
   4  * ====================================================================
   5  * Copyright (c) 2000-2004 CollabNet.  All rights reserved.
   6  *
   7  * This software is licensed as described in the file COPYING, which
   8  * you should have received as part of this distribution.  The terms
   9  * are also available at http://subversion.tigris.org/license-1.html.
  10  * If newer versions of this license are posted there, you may use a
  11  * newer version instead, at your option.
  12  *
  13  * This software consists of voluntary contributions made by many
  14  * individuals.  For exact contribution history, see the revision
  15  * history and logs, available at http://subversion.tigris.org/.
  16  * ====================================================================
  17  */
  18
  19
  20 \f
  21 #include "svn_error.h"
  22 #include "svn_version.h"
  23
  24 #include "svn_private_config.h"
  25
  26 const svn_version_t *
  27 svn_subr_version(void)
  28 {
  29   SVN_VERSION_BODY;
  30 }
  31
  32
  33 svn_boolean_t svn_ver_compatible(const svn_version_t *my_version,
  34                                  const svn_version_t *lib_version)
  35 {
  36   if (lib_version->tag[0] != '\0')
  37     /* Development library; require exact match. */
  38     return svn_ver_equal(my_version, lib_version);
  39   else if (my_version->tag[0] != '\0')
  40     /* Development client; must be newer than the library
  41        and have the same major and minor version. */
  42     return (my_version->major == lib_version->major
  43             && my_version->minor == lib_version->minor
  44             && my_version->patch > lib_version->patch);
  45   else
  46     /* General compatibility rules for released versions. */
  47     return (my_version->major == lib_version->major
  48             && my_version->minor <= lib_version->minor);
  49 }
  50
  51
  52 svn_boolean_t svn_ver_equal(const svn_version_t *my_version,
  53                             const svn_version_t *lib_version)
  54 {
  55   return (my_version->major == lib_version->major
  56           && my_version->minor == lib_version->minor
  57           && my_version->patch == lib_version->patch
  58           && 0 == strcmp(my_version->tag, lib_version->tag));
  59 }
  60
  61
  62 svn_error_t *
  63 svn_ver_check_list(const svn_version_t *my_version,
  64                    const svn_version_checklist_t *checklist)
  65 {
  66   svn_error_t *err = SVN_NO_ERROR;
  67   int i;
  68
  69   for (i = 0; checklist[i].label != NULL; ++i)
  70     {
  71       const svn_version_t *lib_version = checklist[i].version_query();
  72       if (!svn_ver_compatible(my_version, lib_version))
  73         err = svn_error_createf(SVN_ERR_VERSION_MISMATCH, err,
  74                                 _("Version mismatch in '%s':"
  75                                   " found %d.%d.%d%s,"
  76                                   " expected %d.%d.%d%s"),
  77                                 checklist[i].label,
  78                                 lib_version->major, lib_version->minor,
  79                                 lib_version->patch, lib_version->tag,
  80                                 my_version->major, my_version->minor,
  81                                 my_version->patch, my_version->tag);
  82     }
  83
  84   return err;
  85 }