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[binutils.git] / intl / textdomain.c
blob88557460f3b3a6535da599ba233f51309b276999
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.
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.
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.
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. */
19 #ifdef HAVE_CONFIG_H
20 # include <config.h>
21 #endif
23 #if defined STDC_HEADERS || defined _LIBC
24 # include <stdlib.h>
25 #endif
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
36 #ifdef _LIBC
37 # include <libintl.h>
38 #else
39 # include "libgettext.h"
40 #endif
42 /* @@ end of prolog @@ */
44 /* Name of the default text domain. */
45 extern const char _nl_default_default_domain[];
47 /* Default text domain in which entries for gettext(3) are to be found. */
48 extern const char *_nl_current_default_domain;
51 /* Names for the libintl functions are a problem. They must not clash
52 with existing names and they should follow ANSI C. But this source
53 code is also used in GNU C Library where the names have a __
54 prefix. So we have to make a difference here. */
55 #ifdef _LIBC
56 # define TEXTDOMAIN __textdomain
57 # ifndef strdup
58 # define strdup(str) __strdup (str)
59 # endif
60 #else
61 # define TEXTDOMAIN textdomain__
62 #endif
64 /* Set the current default message catalog to DOMAINNAME.
65 If DOMAINNAME is null, return the current default.
66 If DOMAINNAME is "", reset to the default of "messages". */
67 char *
68 TEXTDOMAIN (domainname)
69 const char *domainname;
71 char *old;
73 /* A NULL pointer requests the current setting. */
74 if (domainname == NULL)
75 return (char *) _nl_current_default_domain;
77 old = (char *) _nl_current_default_domain;
79 /* If domain name is the null string set to default domain "messages". */
80 if (domainname[0] == '\0'
81 || strcmp (domainname, _nl_default_default_domain) == 0)
82 _nl_current_default_domain = _nl_default_default_domain;
83 else
85 /* If the following malloc fails `_nl_current_default_domain'
86 will be NULL. This value will be returned and so signals we
87 are out of core. */
88 #if defined _LIBC || defined HAVE_STRDUP
89 _nl_current_default_domain = strdup (domainname);
90 #else
91 size_t len = strlen (domainname) + 1;
92 char *cp = (char *) malloc (len);
93 if (cp != NULL)
94 memcpy (cp, domainname, len);
95 _nl_current_default_domain = cp;
96 #endif
99 if (old != _nl_default_default_domain)
100 free (old);
102 return (char *) _nl_current_default_domain;
105 #ifdef _LIBC
106 /* Alias for function name in GNU C Library. */
107 weak_alias (__textdomain, textdomain);
108 #endif