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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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# ifndef strdup
58#  define strdup(str) __strdup (str)
59# endif
60#else
61# define TEXTDOMAIN textdomain__
62#endif
63
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".  */
67char *
68TEXTDOMAIN (domainname)
69     const char *domainname;
70{
71  char *old;
72
73  /* A NULL pointer requests the current setting.  */
74  if (domainname == NULL)
75    return (char *) _nl_current_default_domain;
76
77  old = (char *) _nl_current_default_domain;
78
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
84    {
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
97    }
98
99  if (old != _nl_default_default_domain)
100    free (old);
101
102  return (char *) _nl_current_default_domain;
103}
104
105#ifdef _LIBC
106/* Alias for function name in GNU C Library.  */
107weak_alias (__textdomain, textdomain);
108#endif
109