intl/bindtextdom.c

   1 /* Implementation of the bindtextdomain(3) function
   2    Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software Foundation,
  16    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 #ifdef HAVE_CONFIG_H
  19 # include <config.h>
  20 #endif
  21
  22 #if defined STDC_HEADERS || defined _LIBC
  23 # include <stdlib.h>
  24 #else
  25 # ifdef HAVE_MALLOC_H
  26 #  include <malloc.h>
  27 # else
  28 void free ();
  29 # endif
  30 #endif
  31
  32 #if defined HAVE_STRING_H || defined _LIBC
  33 # include <string.h>
  34 #else
  35 # include <strings.h>
  36 # ifndef memcpy
  37 #  define memcpy(Dst, Src, Num) bcopy (Src, Dst, Num)
  38 # endif
  39 #endif
  40
  41 #ifdef _LIBC
  42 # include <libintl.h>
  43 #else
  44 # include "libgettext.h"
  45 #endif
  46 #include "gettext.h"
  47 #include "gettextP.h"
  48
  49 /* @@ end of prolog @@ */
  50
  51 /* Contains the default location of the message catalogs.  */
  52 extern const char _nl_default_dirname[];
  53
  54 /* List with bindings of specific domains.  */
  55 extern struct binding *_nl_domain_bindings;
  56
  57
  58 /* Names for the libintl functions are a problem.  They must not clash
  59    with existing names and they should follow ANSI C.  But this source
  60    code is also used in GNU C Library where the names have a __
  61    prefix.  So we have to make a difference here.  */
  62 #ifdef _LIBC
  63 # define BINDTEXTDOMAIN __bindtextdomain
  64 #else
  65 # define BINDTEXTDOMAIN bindtextdomain__
  66 #endif
  67
  68 /* Specify that the DOMAINNAME message catalog will be found
  69    in DIRNAME rather than in the system locale data base.  */
  70 char *
  71 BINDTEXTDOMAIN (domainname, dirname)
  72      const char *domainname;
  73      const char *dirname;
  74 {
  75   struct binding *binding;
  76
  77   /* Some sanity checks.  */
  78   if (domainname == NULL || domainname[0] == '\0')
  79     return NULL;
  80
  81   for (binding = _nl_domain_bindings; binding != NULL; binding = binding->next)
  82     {
  83       int compare = strcmp (domainname, binding->domainname);
  84       if (compare == 0)
  85         /* We found it!  */
  86         break;
  87       if (compare < 0)
  88         {
  89           /* It is not in the list.  */
  90           binding = NULL;
  91           break;
  92         }
  93     }
  94
  95   if (dirname == NULL)
  96     /* The current binding has be to returned.  */
  97     return binding == NULL ? (char *) _nl_default_dirname : binding->dirname;
  98
  99   if (binding != NULL)
 100     {
 101       /* The domain is already bound.  Replace the old binding.  */
 102       char *new_dirname;
 103
 104       if (strcmp (dirname, _nl_default_dirname) == 0)
 105         new_dirname = (char *) _nl_default_dirname;
 106       else
 107         {
 108           size_t len = strlen (dirname) + 1;
 109           new_dirname = (char *) malloc (len);
 110           if (new_dirname == NULL)
 111             return NULL;
 112
 113           memcpy (new_dirname, dirname, len);
 114         }
 115
 116       if (strcmp (binding->dirname, _nl_default_dirname) != 0)
 117         free (binding->dirname);
 118
 119       binding->dirname = new_dirname;
 120     }
 121   else
 122     {
 123       /* We have to create a new binding.  */
 124       size_t len;
 125       struct binding *new_binding =
 126         (struct binding *) malloc (sizeof (*new_binding));
 127
 128       if (new_binding == NULL)
 129         return NULL;
 130
 131       len = strlen (domainname) + 1;
 132       new_binding->domainname = (char *) malloc (len);
 133       if (new_binding->domainname == NULL)
 134           return NULL;
 135       memcpy (new_binding->domainname, domainname, len);
 136
 137       if (strcmp (dirname, _nl_default_dirname) == 0)
 138         new_binding->dirname = (char *) _nl_default_dirname;
 139       else
 140         {
 141           len = strlen (dirname) + 1;
 142           new_binding->dirname = (char *) malloc (len);
 143           if (new_binding->dirname == NULL)
 144             return NULL;
 145           memcpy (new_binding->dirname, dirname, len);
 146         }
 147
 148       /* Now enqueue it.  */
 149       if (_nl_domain_bindings == NULL
 150           || strcmp (domainname, _nl_domain_bindings->domainname) < 0)
 151         {
 152           new_binding->next = _nl_domain_bindings;
 153           _nl_domain_bindings = new_binding;
 154         }
 155       else
 156         {
 157           binding = _nl_domain_bindings;
 158           while (binding->next != NULL
 159                  && strcmp (domainname, binding->next->domainname) > 0)
 160             binding = binding->next;
 161
 162           new_binding->next = binding->next;
 163           binding->next = new_binding;
 164         }
 165
 166       binding = new_binding;
 167     }
 168
 169   return binding->dirname;
 170 }
 171
 172 #ifdef _LIBC
 173 /* Alias for function name in GNU C Library.  */
 174 weak_alias (__bindtextdomain, bindtextdomain);
 175 #endif