/* Implementation of the bindtextdomain(3) function   Copyright (C) 1995-1998, 2000, 2001 Free Software Foundation, Inc.   This program is free software; you can redistribute it and/or modify it   under the terms of the GNU Library 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   Library General Public License for more details.   You should have received a copy of the GNU Library 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#include <stddef.h>#include <stdlib.h>#include <string.h>#ifdef _LIBC# include <libintl.h>#else# include "libgnuintl.h"#endif#include "gettextP.h"#ifdef _LIBC/* We have to handle multi-threaded applications.  */# include <bits/libc-lock.h>#else/* Provide dummy implementation if this is outside glibc.  */# define __libc_rwlock_define(CLASS, NAME)# define __libc_rwlock_wrlock(NAME)# define __libc_rwlock_unlock(NAME)#endif/* The internal variables in the standalone libintl.a must have different   names than the internal variables in GNU libc, otherwise programs   using libintl.a cannot be linked statically.  */#if !defined _LIBC# define _nl_default_dirname _nl_default_dirname__# define _nl_domain_bindings _nl_domain_bindings__#endif/* Some compilers, like SunOS4 cc, don't have offsetof in <stddef.h>.  */#ifndef offsetof# define offsetof(type,ident) ((size_t)&(((type*)0)->ident))#endif/* @@ end of prolog @@ *//* Contains the default location of the message catalogs.  */extern const char _nl_default_dirname[];/* List with bindings of specific domains.  */extern struct binding *_nl_domain_bindings;/* Lock variable to protect the global data in the gettext implementation.  */__libc_rwlock_define (extern, _nl_state_lock)/* 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 BINDTEXTDOMAIN __bindtextdomain# define BIND_TEXTDOMAIN_CODESET __bind_textdomain_codeset# ifndef strdup#  define strdup(str) __strdup (str)# endif#else# define BINDTEXTDOMAIN bindtextdomain__# define BIND_TEXTDOMAIN_CODESET bind_textdomain_codeset__#endif/* Prototypes for local functions.  */static void set_binding_values PARAMS ((const char *domainname,					const char **dirnamep,					const char **codesetp));     /* Specifies the directory name *DIRNAMEP and the output codeset *CODESETP   to be used for the DOMAINNAME message catalog.   If *DIRNAMEP or *CODESETP is NULL, the corresponding attribute is not   modified, only the current value is returned.   If DIRNAMEP or CODESETP is NULL, the corresponding attribute is neither   modified nor returned.  */static voidset_binding_values (domainname, dirnamep, codesetp)     const char *domainname;     const char **dirnamep;     const char **codesetp;{  struct binding *binding;  int modified;  /* Some sanity checks.  */  if (domainname == NULL || domainname[0] == '\0')    {      if (dirnamep)	*dirnamep = NULL;      if (codesetp)	*codesetp = NULL;      return;    }  __libc_rwlock_wrlock (_nl_state_lock);  modified = 0;  for (binding = _nl_domain_bindings; binding != NULL; binding = binding->next)    {      int compare = strcmp (domainname, binding->domainname);      if (compare == 0)	/* We found it!  */	break;      if (compare < 0)	{	  /* It is not in the list.  */	  binding = NULL;	  break;	}    }  if (binding != NULL)    {      if (dirnamep)	{	  const char *dirname = *dirnamep;	  if (dirname == NULL)	    /* The current binding has be to returned.  */	    *dirnamep = binding->dirname;	  else	    {	      /* The domain is already bound.  If the new value and the old		 one are equal we simply do nothing.  Otherwise replace the		 old binding.  */	      char *result = binding->dirname;	      if (strcmp (dirname, result) != 0)		{		  if (strcmp (dirname, _nl_default_dirname) == 0)		    result = (char *) _nl_default_dirname;		  else		    {#if defined _LIBC || defined HAVE_STRDUP		      result = strdup (dirname);#else		      size_t len = strlen (dirname) + 1;		      result = (char *) malloc (len);		      if (__builtin_expect (result != NULL, 1))			memcpy (result, dirname, len);#endif		    }		  if (__builtin_expect (result != NULL, 1))		    {		      if (binding->dirname != _nl_default_dirname)			free (binding->dirname);		      binding->dirname = result;		      modified = 1;		    }		}	      *dirnamep = result;	    }	}      if (codesetp)	{	  const char *codeset = *codesetp;	  if (codeset == NULL)	    /* The current binding has be to returned.  */	    *codesetp = binding->codeset;	  else	    {	      /* The domain is already bound.  If the new value and the old		 one are equal we simply do nothing.  Otherwise replace the		 old binding.  */	      char *result = binding->codeset;	      if (result == NULL || strcmp (codeset, result) != 0)		{#if defined _LIBC || defined HAVE_STRDUP		  result = strdup (codeset);#else		  size_t len = strlen (codeset) + 1;		  result = (char *) malloc (len);		  if (__builtin_expect (result != NULL, 1))		    memcpy (result, codeset, len);#endif		  if (__builtin_expect (result != NULL, 1))		    {		      if (binding->codeset != NULL)			free (binding->codeset);		      binding->codeset = result;		      binding->codeset_cntr++;		      modified = 1;		    }		}	      *codesetp = result;	    }	}    }  else if ((dirnamep == NULL || *dirnamep == NULL)	   && (codesetp == NULL || *codesetp == NULL))    {      /* Simply return the default values.  */      if (dirnamep)	*dirnamep = _nl_default_dirname;      if (codesetp)	*codesetp = NULL;    }  else    {      /* We have to create a new binding.  */      size_t len = strlen (domainname) + 1;      struct binding *new_binding =	(struct binding *) malloc (offsetof (struct binding, domainname) + len);      if (__builtin_expect (new_binding == NULL, 0))	goto failed;      memcpy (new_binding->domainname, domainname, len);      if (dirnamep)	{	  const char *dirname = *dirnamep;	  if (dirname == NULL)	    /* The default value.  */	    dirname = _nl_default_dirname;	  else	    {	      if (strcmp (dirname, _nl_default_dirname) == 0)		dirname = _nl_default_dirname;	      else		{		  char *result;#if defined _LIBC || defined HAVE_STRDUP		  result = strdup (dirname);		  if (__builtin_expect (result == NULL, 0))		    goto failed_dirname;#else		  size_t len = strlen (dirname) + 1;		  result = (char *) malloc (len);		  if (__builtin_expect (result == NULL, 0))		    goto failed_dirname;		  memcpy (result, dirname, len);#endif		  dirname = result;		}	    }	  *dirnamep = dirname;	  new_binding->dirname = (char *) dirname;	}      else	/* The default value.  */	new_binding->dirname = (char *) _nl_default_dirname;      new_binding->codeset_cntr = 0;      if (codesetp)	{	  const char *codeset = *codesetp;	  if (codeset != NULL)	    {	      char *result;#if defined _LIBC || defined HAVE_STRDUP	      result = strdup (codeset);	      if (__builtin_expect (result == NULL, 0))		goto failed_codeset;#else	      size_t len = strlen (codeset) + 1;	      result = (char *) malloc (len);	      if (__builtin_expect (result == NULL, 0))		goto failed_codeset;	      memcpy (result, codeset, len);#endif	      codeset = result;	      new_binding->codeset_cntr++;	    }	  *codesetp = codeset;	  new_binding->codeset = (char *) codeset;	}      else	new_binding->codeset = NULL;      /* Now enqueue it.  */      if (_nl_domain_bindings == NULL	  || strcmp (domainname, _nl_domain_bindings->domainname) < 0)	{	  new_binding->next = _nl_domain_bindings;	  _nl_domain_bindings = new_binding;	}      else	{	  binding = _nl_domain_bindings;	  while (binding->next != NULL		 && strcmp (domainname, binding->next->domainname) > 0)	    binding = binding->next;	  new_binding->next = binding->next;	  binding->next = new_binding;	}      modified = 1;      /* Here we deal with memory allocation failures.  */      if (0)	{	failed_codeset:	  if (new_binding->dirname != _nl_default_dirname)	    free (new_binding->dirname);	failed_dirname:	  free (new_binding);	failed:	  if (dirnamep)	    *dirnamep = NULL;	  if (codesetp)	    *codesetp = NULL;	}    }  /* If we modified any binding, we flush the caches.  */  if (modified)    ++_nl_msg_cat_cntr;  __libc_rwlock_unlock (_nl_state_lock);}/* Specify that the DOMAINNAME message catalog will be found   in DIRNAME rather than in the system locale data base.  */char *BINDTEXTDOMAIN (domainname, dirname)     const char *domainname;     const char *dirname;{  set_binding_values (domainname, &dirname, NULL);  return (char *) dirname;}/* Specify the character encoding in which the messages from the   DOMAINNAME message catalog will be returned.  */char *BIND_TEXTDOMAIN_CODESET (domainname, codeset)     const char *domainname;     const char *codeset;{  set_binding_values (domainname, NULL, &codeset);  return (char *) codeset;}#ifdef _LIBC/* Aliases for function names in GNU C Library.  */weak_alias (__bindtextdomain, bindtextdomain);weak_alias (__bind_textdomain_codeset, bind_textdomain_codeset);#endif