locale/FreeBSD/lmessages.c

   1 /*
   2  * Copyright (c) 2001 Alexey Zelkin <phantom@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD: src/lib/libc/locale/lmessages.c,v 1.14 2003/06/26 10:46:16 phantom Exp $");
  29
  30 #include "xlocale_private.h"
  31
  32 #include <stddef.h>
  33 #include <string.h>
  34
  35 #include "ldpart.h"
  36 #include "lmessages.h"
  37
  38 #define LCMESSAGES_SIZE_FULL (sizeof(struct lc_messages_T) / sizeof(char *))
  39 #define LCMESSAGES_SIZE_MIN \
  40                 (offsetof(struct lc_messages_T, yesstr) / sizeof(char *))
  41
  42 static char empty[] = "";
  43
  44 static const struct lc_messages_T _C_messages_locale = {
  45         "^[yY]" ,       /* yesexpr */
  46         "^[nN]" ,       /* noexpr */
  47         "yes" ,         /* yesstr */
  48         "no"            /* nostr */
  49 };
  50
  51 __private_extern__ int
  52 __messages_load_locale(const char *name, locale_t loc)
  53 {
  54         int ret;
  55         struct __xlocale_st_messages *xp;
  56         static struct __xlocale_st_messages *cache = NULL;
  57
  58         /* 'name' must be already checked. */
  59         if (strcmp(name, "C") == 0 || strcmp(name, "POSIX") == 0) {
  60                 loc->_messages_using_locale = 0;
  61                 XL_RELEASE(loc->__lc_messages);
  62                 loc->__lc_messages = NULL;
  63                 return (_LDP_CACHE);
  64         }
  65
  66         /*
  67          * If the locale name is the same as our cache, use the cache.
  68          */
  69         if (cache && cache->_messages_locale_buf && strcmp(name, cache->_messages_locale_buf) == 0) {
  70                 loc->_messages_using_locale = 1;
  71                 XL_RELEASE(loc->__lc_messages);
  72                 loc->__lc_messages = cache;
  73                 XL_RETAIN(loc->__lc_messages);
  74                 return (_LDP_CACHE);
  75         }
  76         if ((xp = (struct __xlocale_st_messages *)malloc(sizeof(*xp))) == NULL)
  77                 return _LDP_ERROR;
  78         xp->__refcount = 1;
  79         xp->__free_extra = (__free_extra_t)__ldpart_free_extra;
  80         xp->_messages_locale_buf = NULL;
  81
  82         ret = __part_load_locale(name, &loc->_messages_using_locale,
  83                   &xp->_messages_locale_buf, "LC_MESSAGES/LC_MESSAGES",
  84                   LCMESSAGES_SIZE_FULL, LCMESSAGES_SIZE_MIN,
  85                   (const char **)&xp->_messages_locale);
  86         if (ret == _LDP_LOADED) {
  87                 if (xp->_messages_locale.yesstr == NULL)
  88                         xp->_messages_locale.yesstr = empty;
  89                 if (xp->_messages_locale.nostr == NULL)
  90                         xp->_messages_locale.nostr = empty;
  91                 XL_RELEASE(loc->__lc_messages);
  92                 loc->__lc_messages = xp;
  93                 XL_RELEASE(cache);
  94                 cache = xp;
  95                 XL_RETAIN(cache);
  96         } else if (ret == _LDP_ERROR)
  97                 free(xp);
  98         return (ret);
  99 }
 100
 101 __private_extern__ struct lc_messages_T *
 102 __get_current_messages_locale(locale_t loc)
 103 {
 104         return (loc->_messages_using_locale
 105                 ? &loc->__lc_messages->_messages_locale
 106                 : (struct lc_messages_T *)&_C_messages_locale);
 107 }
 108
 109 #ifdef LOCALE_DEBUG
 110 void
 111 msgdebug() {
 112 locale_t loc = __current_locale();
 113 printf( "yesexpr = %s\n"
 114         "noexpr = %s\n"
 115         "yesstr = %s\n"
 116         "nostr = %s\n",
 117         loc->__lc_messages->_messages_locale.yesexpr,
 118         loc->__lc_messages->_messages_locale.noexpr,
 119         loc->__lc_messages->_messages_locale.yesstr,
 120         loc->__lc_messages->_messages_locale.nostr
 121 );
 122 }
 123 #endif /* LOCALE_DEBUG */