intl/bindtextdom.c

   1 /* Implementation of the bindtextdomain(3) function
   2    Copyright (C) 1995, 1996, 1997, 1998 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 # ifndef strdup
  65 #  define strdup(str) __strdup (str)
  66 # endif
  67 #else
  68 # define BINDTEXTDOMAIN bindtextdomain__
  69 #endif
  70
  71 /* Specify that the DOMAINNAME message catalog will be found
  72    in DIRNAME rather than in the system locale data base.  */
  73 char *
  74 BINDTEXTDOMAIN (domainname, dirname)
  75      const char *domainname;
  76      const char *dirname;
  77 {
  78   struct binding *binding;
  79
  80   /* Some sanity checks.  */
  81   if (domainname == NULL || domainname[0] == '\0')
  82     return NULL;
  83
  84   for (binding = _nl_domain_bindings; binding != NULL; binding = binding->next)
  85     {
  86       int compare = strcmp (domainname, binding->domainname);
  87       if (compare == 0)
  88         /* We found it!  */
  89         break;
  90       if (compare < 0)
  91         {
  92           /* It is not in the list.  */
  93           binding = NULL;
  94           break;
  95         }
  96     }
  97
  98   if (dirname == NULL)
  99     /* The current binding has be to returned.  */
 100     return binding == NULL ? (char *) _nl_default_dirname : binding->dirname;
 101
 102   if (binding != NULL)
 103     {
 104       /* The domain is already bound.  If the new value and the old
 105          one are equal we simply do nothing.  Otherwise replace the
 106          old binding.  */
 107       if (strcmp (dirname, binding->dirname) != 0)
 108         {
 109           char *new_dirname;
 110
 111           if (strcmp (dirname, _nl_default_dirname) == 0)
 112             new_dirname = (char *) _nl_default_dirname;
 113           else
 114             {
 115 #if defined _LIBC || defined HAVE_STRDUP
 116               new_dirname = strdup (dirname);
 117               if (new_dirname == NULL)
 118                 return NULL;
 119 #else
 120               size_t len = strlen (dirname) + 1;
 121               new_dirname = (char *) malloc (len);
 122               if (new_dirname == NULL)
 123                 return NULL;
 124
 125               memcpy (new_dirname, dirname, len);
 126 #endif
 127             }
 128
 129           if (binding->dirname != _nl_default_dirname)
 130             free (binding->dirname);
 131
 132           binding->dirname = new_dirname;
 133         }
 134     }
 135   else
 136     {
 137       /* We have to create a new binding.  */
 138 #if !defined _LIBC && !defined HAVE_STRDUP
 139       size_t len;
 140 #endif
 141       struct binding *new_binding =
 142         (struct binding *) malloc (sizeof (*new_binding));
 143
 144       if (new_binding == NULL)
 145         return NULL;
 146
 147 #if defined _LIBC || defined HAVE_STRDUP
 148       new_binding->domainname = strdup (domainname);
 149       if (new_binding->domainname == NULL)
 150         return NULL;
 151 #else
 152       len = strlen (domainname) + 1;
 153       new_binding->domainname = (char *) malloc (len);
 154       if (new_binding->domainname == NULL)
 155         return NULL;
 156       memcpy (new_binding->domainname, domainname, len);
 157 #endif
 158
 159       if (strcmp (dirname, _nl_default_dirname) == 0)
 160         new_binding->dirname = (char *) _nl_default_dirname;
 161       else
 162         {
 163 #if defined _LIBC || defined HAVE_STRDUP
 164           new_binding->dirname = strdup (dirname);
 165           if (new_binding->dirname == NULL)
 166             return NULL;
 167 #else
 168           len = strlen (dirname) + 1;
 169           new_binding->dirname = (char *) malloc (len);
 170           if (new_binding->dirname == NULL)
 171             return NULL;
 172           memcpy (new_binding->dirname, dirname, len);
 173 #endif
 174         }
 175
 176       /* Now enqueue it.  */
 177       if (_nl_domain_bindings == NULL
 178           || strcmp (domainname, _nl_domain_bindings->domainname) < 0)
 179         {
 180           new_binding->next = _nl_domain_bindings;
 181           _nl_domain_bindings = new_binding;
 182         }
 183       else
 184         {
 185           binding = _nl_domain_bindings;
 186           while (binding->next != NULL
 187                  && strcmp (domainname, binding->next->domainname) > 0)
 188             binding = binding->next;
 189
 190           new_binding->next = binding->next;
 191           binding->next = new_binding;
 192         }
 193
 194       binding = new_binding;
 195     }
 196
 197   return binding->dirname;
 198 }
 199
 200 #ifdef _LIBC
 201 /* Alias for function name in GNU C Library.  */
 202 weak_alias (__bindtextdomain, bindtextdomain);
 203 #endif