* config/: New.

[bison.git] / intl / textdomain.c

diff --git a/intl/textdomain.c b/intl/textdomain.c
index 88557460f3b3a6535da599ba233f51309b276999..05c2fd76b3c7655fccca0d5e73a895424d6dd4f4 100644 (file)
--- a/intl/textdomain.c
+++ b/intl/textdomain.c
@@ -1,6 +1,5 @@
 /* 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.
+   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 General Public License as published by
@@ -20,23 +19,32 @@
 # include <config.h>
 #endif
 
-#if defined STDC_HEADERS || defined _LIBC
-# include <stdlib.h>
-#endif
+#include <stdlib.h>
+#include <string.h>
 
-#if defined STDC_HEADERS || defined HAVE_STRING_H || defined _LIBC
-# include <string.h>
+#ifdef _LIBC
+# include <libintl.h>
 #else
-# include <strings.h>
-# ifndef memcpy
-#  define memcpy(Dst, Src, Num) bcopy (Src, Dst, Num)
-# endif
+# include "libgnuintl.h"
 #endif
+#include "gettextP.h"
 
 #ifdef _LIBC
-# include <libintl.h>
+/* We have to handle multi-threaded applications.  */
+# include <bits/libc-lock.h>
 #else
-# include "libgettext.h"
+/* 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_default_domain _nl_default_default_domain__
+# define _nl_current_default_domain _nl_current_default_domain__
 #endif
 
 /* @@ end of prolog @@ */
@@ -61,6 +69,9 @@ extern const char *_nl_current_default_domain;
 # define TEXTDOMAIN textdomain__
 #endif
 
+/* Lock variable to protect the global data in the gettext implementation.  */
+__libc_rwlock_define (extern, _nl_state_lock)
+
 /* 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".  */
@@ -68,38 +79,60 @@ char *
 TEXTDOMAIN (domainname)
      const char *domainname;
 {
-  char *old;
+  char *new_domain;
+  char *old_domain;
 
   /* A NULL pointer requests the current setting.  */
   if (domainname == NULL)
     return (char *) _nl_current_default_domain;
 
-  old = (char *) _nl_current_default_domain;
+  __libc_rwlock_wrlock (_nl_state_lock);
+
+  old_domain = (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;
+    {
+      _nl_current_default_domain = _nl_default_default_domain;
+      new_domain = (char *) _nl_current_default_domain;
+    }
+  else if (strcmp (domainname, old_domain) == 0)
+    /* This can happen and people will use it to signal that some
+       environment variable changed.  */
+    new_domain = old_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);
+      new_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;
+      new_domain = (char *) malloc (len);
+      if (new_domain != NULL)
+       memcpy (new_domain, domainname, len);
 #endif
+
+      if (new_domain != NULL)
+       _nl_current_default_domain = new_domain;
+    }
+
+  /* We use this possibility to signal a change of the loaded catalogs
+     since this is most likely the case and there is no other easy we
+     to do it.  Do it only when the call was successful.  */
+  if (new_domain != NULL)
+    {
+      ++_nl_msg_cat_cntr;
+
+      if (old_domain != new_domain && old_domain != _nl_default_default_domain)
+       free (old_domain);
     }
 
-  if (old != _nl_default_default_domain)
-    free (old);
+  __libc_rwlock_unlock (_nl_state_lock);
 
-  return (char *) _nl_current_default_domain;
+  return new_domain;
 }
 
 #ifdef _LIBC