lib/localename-table.c

   1 /* Table that maps a locale object to the names of the locale categories.
   2    Copyright (C) 2018-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU Lesser General Public License as published by
   6    the Free Software Foundation; either version 2.1 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2018.  */
  18
  19 #include <config.h>
  20
  21 #if HAVE_WORKING_USELOCALE && HAVE_NAMELESS_LOCALES
  22
  23 /* Specification.  */
  24 #include "localename-table.h"
  25
  26 #include <stdint.h>
  27
  28 /* A hash function for pointers.  */
  29 size_t _GL_ATTRIBUTE_CONST
  30 locale_hash_function (locale_t x)
  31 {
  32   uintptr_t p = (uintptr_t) x;
  33   size_t h = ((p % 4177) << 12) + ((p % 79) << 6) + (p % 61);
  34   return h;
  35 }
  36
  37 struct locale_hash_node * locale_hash_table[LOCALE_HASH_TABLE_SIZE]
  38   /* = { NULL, ..., NULL } */;
  39
  40 gl_rwlock_define_initialized(, locale_lock)
  41
  42 #else
  43
  44 /* This declaration is solely to ensure that after preprocessing
  45    this file is never empty.  */
  46 typedef int dummy;
  47
  48 #endif