lib/libc/locale/newlocale.c

   1 /* $NetBSD: newlocale.c,v 1.3 2013/09/13 13:13:32 joerg Exp $ */
   2
   3 /*-
   4  * Copyright (c)2008, 2011 Citrus Project,
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __RCSID("$NetBSD: newlocale.c,v 1.3 2013/09/13 13:13:32 joerg Exp $");
  31
  32 #include "namespace.h"
  33 #include <assert.h>
  34 #include <errno.h>
  35 #include <locale.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38
  39 #include "setlocale_local.h"
  40
  41 __weak_alias(newlocale, _newlocale)
  42
  43 locale_t
  44 newlocale(int mask, const char *name, locale_t src)
  45 {
  46         struct _locale *dst;
  47         char head[_LOCALENAME_LEN_MAX * (_LC_LAST - 1)], *tail;
  48         const char *tokens[_LC_LAST - 1];
  49         _locale_set_t l;
  50         int i, howmany, categories[_LC_LAST - 1];
  51
  52         if (name == NULL)
  53                 name = _C_LOCALE;
  54         dst = malloc(sizeof(*dst));
  55         if (dst == NULL)
  56                 return (locale_t)NULL;
  57         if (src == NULL)
  58                 src = _current_locale();
  59         memcpy(dst, src, sizeof(*src));
  60         strlcpy(&head[0], name, sizeof(head));
  61         tokens[0] = (const char *)&head[0];
  62         tail = strchr(tokens[0], '/');
  63         if (tail == NULL) {
  64                 for (i = 1; i < _LC_LAST; ++i) {
  65                         if (mask & (1 << i)) {
  66                                 l = _find_category(i);
  67                                 _DIAGASSERT(l != NULL);
  68                                 (*l)(tokens[0], dst);
  69                         }
  70                 }
  71         } else {
  72                 *tail++ = '\0';
  73                 howmany = 0;
  74                 for (i = 1; i < _LC_LAST; ++i) {
  75                         if (mask & (1 << i))
  76                                 categories[howmany++] = i;
  77                 }
  78                 if (howmany-- > 0) {
  79                         for (i = 1; i < howmany; ++i) {
  80                                 tokens[i] = (const char *)tail;
  81                                 tail = strchr(tokens[i], '/');
  82                                 if (tail == NULL) {
  83                                         free(dst);
  84                                         return NULL;
  85                                 }
  86                         }
  87                         tokens[howmany] = tail;
  88                         tail = strchr(tokens[howmany], '/');
  89                         if (tail != NULL) {
  90                                 free(dst);
  91                                 return NULL;
  92                         }
  93                         for (i = 0; i <= howmany; ++i) {
  94                                 l = _find_category(categories[i]);
  95                                 _DIAGASSERT(l != NULL);
  96                                 (*l)(tokens[i], dst);
  97                         }
  98                 }
  99         }
 100         if (_setlocale_cache(dst, NULL)) {
 101                 free(dst);
 102                 return NULL;
 103         }
 104         return (locale_t)dst;
 105 }