1/* Implementation of the textdomain(3) function
2   Copyright (C) 1995, 1996, 1997 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/* @@ end of prolog @@ */
43
44/* Name of the default text domain.  */
45extern const char _nl_default_default_domain[];
46
47/* Default text domain in which entries for gettext(3) are to be found.  */
48extern const char *_nl_current_default_domain;
49
50
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# define strdup(str) __strdup (str)
58#else
59# define TEXTDOMAIN textdomain__
60#endif
61
62/* Set the current default message catalog to DOMAINNAME.
63   If DOMAINNAME is null, return the current default.
64   If DOMAINNAME is "", reset to the default of "messages".  */
65char *
66TEXTDOMAIN (domainname)
67     const char *domainname;
68{
69  char *old;
70
71  /* A NULL pointer requests the current setting.  */
72  if (domainname == NULL)
73    return (char *) _nl_current_default_domain;
74
75  old = (char *) _nl_current_default_domain;
76
77  /* If domain name is the null string set to default domain "messages".  */
78  if (domainname[0] == '\0'
79      || strcmp (domainname, _nl_default_default_domain) == 0)
80    _nl_current_default_domain = _nl_default_default_domain;
81  else
82    {
83      /* If the following malloc fails `_nl_current_default_domain'
84	 will be NULL.  This value will be returned and so signals we
85	 are out of core.  */
86#if defined _LIBC || defined HAVE_STRDUP
87      _nl_current_default_domain = strdup (domainname);
88#else
89      size_t len = strlen (domainname) + 1;
90      char *cp = (char *) malloc (len);
91      if (cp != NULL)
92	memcpy (cp, domainname, len);
93      _nl_current_default_domain = cp;
94#endif
95    }
96
97  if (old != _nl_default_default_domain)
98    free (old);
99
100  return (char *) _nl_current_default_domain;
101}
102
103#ifdef _LIBC
104/* Alias for function name in GNU C Library.  */
105weak_alias (__textdomain, textdomain);
106#endif
107