lib/libc/string/wcsxfrm.c

   1 /*
   2  * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
   3  * Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
   4  *              at Electronni Visti IA, Kiev, Ukraine.
   5  *                      All rights reserved.
   6  *
   7  * Copyright (c) 2011 The FreeBSD Foundation
   8  * All rights reserved.
   9  * Portions of this software were developed by David Chisnall
  10  * under sponsorship from the FreeBSD Foundation.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <wchar.h>
  37 #include "collate.h"
  38
  39 size_t
  40 wcsxfrm_l(wchar_t * __restrict dest, const wchar_t * __restrict src, size_t len, locale_t locale)
  41 {
  42         size_t slen;
  43         FIX_LOCALE(locale);
  44         struct xlocale_collate *table =
  45                 (struct xlocale_collate*)locale->components[XLC_COLLATE];
  46
  47         if (*src == L'\0') {
  48                 if (len != 0)
  49                         *dest = L'\0';
  50                 return (0);
  51         }
  52
  53         if ((table->__collate_load_error) ||
  54             ((slen = _collate_wxfrm(table, src, dest, len)) == (size_t)-1)) {
  55                 goto error;
  56         }
  57
  58         /* Add null termination at the correct location. */
  59         if (len > slen) {
  60                 dest[slen] = 0;
  61         } else if (len) {
  62                 dest[len-1] = 0;
  63         }
  64
  65         return (slen);
  66
  67 error:
  68         slen = wcslen(src);
  69         if (slen < len)
  70                 (void) wcscpy(dest, src);
  71         else {
  72                 (void) wcsncpy(dest, src, len - 1);
  73                 dest[len - 1] = L'\0';
  74         }
  75         return (slen);
  76 }
  77
  78 size_t
  79 wcsxfrm(wchar_t * __restrict dest, const wchar_t * __restrict src, size_t len)
  80 {
  81         return wcsxfrm_l(dest, src, len, __get_locale());
  82 }