usr/src/lib/libc/port/locale/wcsxfrm.c

   1 /*
   2  * Copyright 2013 Garrett D'Amore <garrett@damore.org>
   3  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
   4  * Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
   5  *              at Electronni Visti IA, Kiev, Ukraine.
   6  *                      All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include "lint.h"
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include <wchar.h>
  34 #include <assert.h>
  35 #include "collate.h"
  36
  37 #define WCS_XFRM_OFFSET 1
  38
  39 size_t
  40 wcsxfrm_l(wchar_t *_RESTRICT_KYWD dest,
  41     const wchar_t *_RESTRICT_KYWD src, size_t len, locale_t loc)
  42 {
  43         size_t slen;
  44         const struct lc_collate *lcc = loc->collate;
  45
  46         if (*src == L'\0') {
  47                 if (len != 0)
  48                         *dest = L'\0';
  49                 return (0);
  50         }
  51
  52         if ((lcc->lc_is_posix) ||
  53             ((slen = _collate_wxfrm(lcc, src, dest, len)) == (size_t)-1)) {
  54                 goto error;
  55         }
  56
  57         /* Add null termination at the correct location. */
  58         if (len > slen) {
  59                 dest[slen] = 0;
  60         } else if (len != 0) {
  61                 dest[len-1] = 0;
  62         }
  63
  64         return (slen);
  65
  66 error:
  67         slen = wcslen(src);
  68         if (slen < len)
  69                 (void) wcscpy(dest, src);
  70         else if (len != 0) {
  71                 (void) wcsncpy(dest, src, len - 1);
  72                 dest[len - 1] = L'\0';
  73         }
  74         return (slen);
  75 }
  76
  77 size_t
  78 wcsxfrm(wchar_t *_RESTRICT_KYWD dest,
  79     const wchar_t *_RESTRICT_KYWD src, size_t len)
  80 {
  81         return (wcsxfrm_l(dest, src, len, uselocale(NULL)));
  82 }