intl/finddomain.c

   1 /* Handle list of needed message catalogs
   2    Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
   3    Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
   4
   5    This file is part of the GNU C Library.  Its master source is NOT part of
   6    the C library, however.
   7
   8    The GNU C Library is free software; you can redistribute it and/or
   9    modify it under the terms of the GNU Library General Public License as
  10    published by the Free Software Foundation; either version 2 of the
  11    License, or (at your option) any later version.
  12
  13    The GNU C Library is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16    Library General Public License for more details.
  17
  18    You should have received a copy of the GNU Library General Public
  19    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  20    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 # include <config.h>
  25 #endif
  26
  27 #include <ctype.h>
  28 #include <errno.h>
  29 #include <stdio.h>
  30 #include <sys/types.h>
  31
  32 #if defined STDC_HEADERS || defined _LIBC
  33 # include <stdlib.h>
  34 #else
  35 # ifdef HAVE_MALLOC_H
  36 #  include <malloc.h>
  37 # else
  38 void free ();
  39 # endif
  40 #endif
  41
  42 #if defined HAVE_STRING_H || defined _LIBC
  43 # include <string.h>
  44 #else
  45 # include <strings.h>
  46 # ifndef memcpy
  47 #  define memcpy(Dst, Src, Num) bcopy (Src, Dst, Num)
  48 # endif
  49 #endif
  50 #if !HAVE_STRCHR && !defined _LIBC
  51 # ifndef strchr
  52 #  define strchr index
  53 # endif
  54 #endif
  55
  56 #if defined HAVE_UNISTD_H || defined _LIBC
  57 # include <unistd.h>
  58 #endif
  59
  60 #include "gettext.h"
  61 #include "gettextP.h"
  62 #ifdef _LIBC
  63 # include <libintl.h>
  64 #else
  65 # include "libgettext.h"
  66 #endif
  67
  68 /* @@ end of prolog @@ */
  69 /* List of already loaded domains.  */
  70 static struct loaded_l10nfile *_nl_loaded_domains;
  71
  72
  73 /* Return a data structure describing the message catalog described by
  74    the DOMAINNAME and CATEGORY parameters with respect to the currently
  75    established bindings.  */
  76 struct loaded_l10nfile *
  77 internal_function
  78 _nl_find_domain (dirname, locale, domainname)
  79      const char *dirname;
  80      char *locale;
  81      const char *domainname;
  82 {
  83   struct loaded_l10nfile *retval;
  84   const char *language;
  85   const char *modifier;
  86   const char *territory;
  87   const char *codeset;
  88   const char *normalized_codeset;
  89   const char *special;
  90   const char *sponsor;
  91   const char *revision;
  92   const char *alias_value;
  93   int mask;
  94
  95   /* LOCALE can consist of up to four recognized parts for the XPG syntax:
  96
  97                 language[_territory[.codeset]][@modifier]
  98
  99      and six parts for the CEN syntax:
 100
 101         language[_territory][+audience][+special][,[sponsor][_revision]]
 102
 103      Beside the first part all of them are allowed to be missing.  If
 104      the full specified locale is not found, the less specific one are
 105      looked for.  The various parts will be stripped off according to
 106      the following order:
 107                 (1) revision
 108                 (2) sponsor
 109                 (3) special
 110                 (4) codeset
 111                 (5) normalized codeset
 112                 (6) territory
 113                 (7) audience/modifier
 114    */
 115
 116   /* If we have already tested for this locale entry there has to
 117      be one data set in the list of loaded domains.  */
 118   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
 119                                strlen (dirname) + 1, 0, locale, NULL, NULL,
 120                                NULL, NULL, NULL, NULL, NULL, domainname, 0);
 121   if (retval != NULL)
 122     {
 123       /* We know something about this locale.  */
 124       int cnt;
 125
 126       if (retval->decided == 0)
 127         _nl_load_domain (retval);
 128
 129       if (retval->data != NULL)
 130         return retval;
 131
 132       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 133         {
 134           if (retval->successor[cnt]->decided == 0)
 135             _nl_load_domain (retval->successor[cnt]);
 136
 137           if (retval->successor[cnt]->data != NULL)
 138             break;
 139         }
 140       return cnt >= 0 ? retval : NULL;
 141       /* NOTREACHED */
 142     }
 143
 144   /* See whether the locale value is an alias.  If yes its value
 145      *overwrites* the alias name.  No test for the original value is
 146      done.  */
 147   alias_value = _nl_expand_alias (locale);
 148   if (alias_value != NULL)
 149     {
 150 #if defined _LIBC || defined HAVE_STRDUP
 151       locale = strdup (alias_value);
 152       if (locale == NULL)
 153         return NULL;
 154 #else
 155       size_t len = strlen (alias_value) + 1;
 156       locale = (char *) malloc (len);
 157       if (locale == NULL)
 158         return NULL;
 159
 160       memcpy (locale, alias_value, len);
 161 #endif
 162     }
 163
 164   /* Now we determine the single parts of the locale name.  First
 165      look for the language.  Termination symbols are `_' and `@' if
 166      we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
 167   mask = _nl_explode_name (locale, &language, &modifier, &territory,
 168                            &codeset, &normalized_codeset, &special,
 169                            &sponsor, &revision);
 170
 171   /* Create all possible locale entries which might be interested in
 172      generalization.  */
 173   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
 174                                strlen (dirname) + 1, mask, language, territory,
 175                                codeset, normalized_codeset, modifier, special,
 176                                sponsor, revision, domainname, 1);
 177   if (retval == NULL)
 178     /* This means we are out of core.  */
 179     return NULL;
 180
 181   if (retval->decided == 0)
 182     _nl_load_domain (retval);
 183   if (retval->data == NULL)
 184     {
 185       int cnt;
 186       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 187         {
 188           if (retval->successor[cnt]->decided == 0)
 189             _nl_load_domain (retval->successor[cnt]);
 190           if (retval->successor[cnt]->data != NULL)
 191             break;
 192         }
 193     }
 194
 195   /* The room for an alias was dynamically allocated.  Free it now.  */
 196   if (alias_value != NULL)
 197     free (locale);
 198
 199   return retval;
 200 }
 201
 202
 203 #ifdef _LIBC
 204 static void __attribute__ ((unused))
 205 free_mem (void)
 206 {
 207   struct loaded_l10nfile *runp = _nl_loaded_domains;
 208
 209   while (runp != NULL)
 210     {
 211       struct loaded_l10nfile *here = runp;
 212       if (runp->data != NULL)
 213         _nl_unload_domain ((struct loaded_domain *) runp->data);
 214       runp = runp->next;
 215       free (here);
 216     }
 217 }
 218
 219 text_set_element (__libc_subfreeres, free_mem);
 220 #endif