/* Implementation of the textdomain(3) function.   Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.   Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.   This program is free software; you can redistribute it and/or modify   it under the terms of the GNU General Public License as published by   the Free Software Foundation; either version 2, or (at your option)   any later version.   This program is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   GNU General Public License for more details.   You should have received a copy of the GNU General Public License   along with this program; if not, write to the Free Software Foundation,   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */#ifdef HAVE_CONFIG_H# include <config.h>#endif#if defined STDC_HEADERS || defined _LIBC# include <stdlib.h>#endif#if defined STDC_HEADERS || defined HAVE_STRING_H || defined _LIBC# include <string.h>#else# include <strings.h># ifndef memcpy#  define memcpy(Dst, Src, Num) bcopy (Src, Dst, Num)# endif#endif#ifdef _LIBC# include <libintl.h>#else# include "libgettext.h"#endif/* @@ end of prolog @@ *//* Name of the default text domain.  */extern const char _nl_default_default_domain[];/* Default text domain in which entries for gettext(3) are to be found.  */extern const char *_nl_current_default_domain;/* Names for the libintl functions are a problem.  They must not clash   with existing names and they should follow ANSI C.  But this source   code is also used in GNU C Library where the names have a __   prefix.  So we have to make a difference here.  */#ifdef _LIBC# define TEXTDOMAIN __textdomain# ifndef strdup#  define strdup(str) __strdup (str)# endif#else# define TEXTDOMAIN textdomain__#endif/* Set the current default message catalog to DOMAINNAME.   If DOMAINNAME is null, return the current default.   If DOMAINNAME is "", reset to the default of "messages".  */char *TEXTDOMAIN (domainname)     const char *domainname;{  char *old;  /* A NULL pointer requests the current setting.  */  if (domainname == NULL)    return (char *) _nl_current_default_domain;  old = (char *) _nl_current_default_domain;  /* If domain name is the null string set to default domain "messages".  */  if (domainname[0] == '\0'      || strcmp (domainname, _nl_default_default_domain) == 0)    _nl_current_default_domain = _nl_default_default_domain;  else    {      /* If the following malloc fails `_nl_current_default_domain'	 will be NULL.  This value will be returned and so signals we	 are out of core.  */#if defined _LIBC || defined HAVE_STRDUP      _nl_current_default_domain = strdup (domainname);#else      size_t len = strlen (domainname) + 1;      char *cp = (char *) malloc (len);      if (cp != NULL)	memcpy (cp, domainname, len);      _nl_current_default_domain = cp;#endif    }  if (old != _nl_default_default_domain)    free (old);  return (char *) _nl_current_default_domain;}#ifdef _LIBC/* Alias for function name in GNU C Library.  */weak_alias (__textdomain, textdomain);#endif