treewide: fix incorrect spelling of indices in comments

[thirdparty/glibc.git] / locale / duplocale.c

diff --git a/locale/duplocale.c b/locale/duplocale.c
index 14eeddd6271c3a316d5557e16ed28b078b3cd9d0..1f715964a8c539d21050d0a0a2f452c4825b3f14 100644 (file)
--- a/locale/duplocale.c
+++ b/locale/duplocale.c
@@ -1,5 +1,5 @@
 /* Duplicate handle for selection of locales.
-   Copyright (C) 1997, 2000 Free Software Foundation, Inc.
+   Copyright (C) 1997-2020 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
@@ -14,45 +14,76 @@
    Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
 
 #include <locale.h>
-#include <bits/libc-lock.h>
+#include <libc-lock.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include <localeinfo.h>
 
 
 /* Lock for protecting global data.  */
-__libc_lock_define (extern , __libc_setlocale_lock)
+__libc_rwlock_define (extern , __libc_setlocale_lock attribute_hidden)
 
 
-__locale_t
-__duplocale (__locale_t dataset)
+locale_t
+__duplocale (locale_t dataset)
 {
-  __locale_t result;
+  /* This static object is returned for newlocale (LC_ALL_MASK, "C").  */
+  if (dataset == _nl_C_locobj_ptr)
+    return dataset;
 
-  /* We modify global data.  */
-  __libc_lock_lock (__libc_setlocale_lock);
+  /* Handle a special value.  */
+  if (dataset == LC_GLOBAL_LOCALE)
+    dataset = &_nl_global_locale;
+
+  locale_t result;
+  int cnt;
+  size_t names_len = 0;
+
+  /* Calculate the total space we need to store all the names.  */
+  for (cnt = 0; cnt < __LC_LAST; ++cnt)
+    if (cnt != LC_ALL && dataset->__names[cnt] != _nl_C_name)
+      names_len += strlen (dataset->__names[cnt]) + 1;
 
   /* Get memory.  */
-  result = (__locale_t) malloc (sizeof (struct __locale_struct));
+  result = malloc (sizeof (struct __locale_struct) + names_len);
+
   if (result != NULL)
     {
-      int cnt;
+      char *namep = (char *) (result + 1);
+
+      /* We modify global data (the usage counts).  */
+      __libc_rwlock_wrlock (__libc_setlocale_lock);
+
       for (cnt = 0; cnt < __LC_LAST; ++cnt)
        if (cnt != LC_ALL)
          {
            result->__locales[cnt] = dataset->__locales[cnt];
            if (result->__locales[cnt]->usage_count < MAX_USAGE_COUNT)
              ++result->__locales[cnt]->usage_count;
+
+           if (dataset->__names[cnt] == _nl_C_name)
+             result->__names[cnt] = _nl_C_name;
+           else
+             {
+               result->__names[cnt] = namep;
+               namep = __stpcpy (namep, dataset->__names[cnt]) + 1;
+             }
          }
-    }
 
-  /* It's done.  */
-  __libc_lock_unlock (__libc_setlocale_lock);
+      /* Update the special members.  */
+      result->__ctype_b = dataset->__ctype_b;
+      result->__ctype_tolower = dataset->__ctype_tolower;
+      result->__ctype_toupper = dataset->__ctype_toupper;
+
+      /* It's done.  */
+      __libc_rwlock_unlock (__libc_setlocale_lock);
+    }
 
   return result;
 }
+weak_alias (__duplocale, duplocale)