gcc/intl/textdomain.c

   1 /* Implementation of the textdomain(3) function.
   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 program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 #ifdef HAVE_CONFIG_H
  20 # include <config.h>
  21 #endif
  22
  23 #if defined STDC_HEADERS || defined _LIBC
  24 # include <stdlib.h>
  25 #endif
  26
  27 #if defined STDC_HEADERS || defined HAVE_STRING_H || defined _LIBC
  28 # include <string.h>
  29 #else
  30 # include <strings.h>
  31 # ifndef memcpy
  32 #  define memcpy(Dst, Src, Num) bcopy (Src, Dst, Num)
  33 # endif
  34 #endif
  35
  36 #ifdef _LIBC
  37 # include <libintl.h>
  38 #else
  39 # include "libgettext.h"
  40 #endif
  41
  42 /* The internal variables in the standalone libintl.a must have different
  43    names than the internal variables in GNU libc, otherwise programs
  44    using libintl.a cannot be linked statically.  */
  45 #if !defined _LIBC
  46 # define _nl_default_default_domain _nl_default_default_domain__
  47 # define _nl_current_default_domain _nl_current_default_domain__
  48 #endif
  49
  50 /* @@ end of prolog @@ */
  51
  52 /* Name of the default text domain.  */
  53 extern const char _nl_default_default_domain[];
  54
  55 /* Default text domain in which entries for gettext(3) are to be found.  */
  56 extern const char *_nl_current_default_domain;
  57
  58
  59 /* Names for the libintl functions are a problem.  They must not clash
  60    with existing names and they should follow ANSI C.  But this source
  61    code is also used in GNU C Library where the names have a __
  62    prefix.  So we have to make a difference here.  */
  63 #ifdef _LIBC
  64 # define TEXTDOMAIN __textdomain
  65 # ifndef strdup
  66 #  define strdup(str) __strdup (str)
  67 # endif
  68 #else
  69 # define TEXTDOMAIN textdomain__
  70 #endif
  71
  72 /* Set the current default message catalog to DOMAINNAME.
  73    If DOMAINNAME is null, return the current default.
  74    If DOMAINNAME is "", reset to the default of "messages".  */
  75 char *
  76 TEXTDOMAIN (domainname)
  77      const char *domainname;
  78 {
  79   char *old;
  80
  81   /* A NULL pointer requests the current setting.  */
  82   if (domainname == NULL)
  83     return (char *) _nl_current_default_domain;
  84
  85   old = (char *) _nl_current_default_domain;
  86
  87   /* If domain name is the null string set to default domain "messages".  */
  88   if (domainname[0] == '\0'
  89       || strcmp (domainname, _nl_default_default_domain) == 0)
  90     _nl_current_default_domain = _nl_default_default_domain;
  91   else
  92     {
  93       /* If the following malloc fails `_nl_current_default_domain'
  94          will be NULL.  This value will be returned and so signals we
  95          are out of core.  */
  96 #if defined _LIBC || defined HAVE_STRDUP
  97       _nl_current_default_domain = strdup (domainname);
  98 #else
  99       size_t len = strlen (domainname) + 1;
 100       char *cp = (char *) malloc (len);
 101       if (cp != NULL)
 102         memcpy (cp, domainname, len);
 103       _nl_current_default_domain = cp;
 104 #endif
 105     }
 106
 107   if (old != _nl_default_default_domain)
 108     free (old);
 109
 110   return (char *) _nl_current_default_domain;
 111 }
 112
 113 #ifdef _LIBC
 114 /* Alias for function name in GNU C Library.  */
 115 weak_alias (__textdomain, textdomain);
 116 #endif