1 /*
   2  * Copyright 2011 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  * 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 ``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 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 "lint.h"
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <wchar.h>
  33 #include <assert.h>
  34 #include "collate.h"
  35 
  36 #define WCS_XFRM_OFFSET 1
  37 
  38 size_t
  39 wcsxfrm(wchar_t *_RESTRICT_KYWD dest,
  40     const wchar_t *_RESTRICT_KYWD src, size_t len)
  41 {
  42         size_t slen;
  43 
  44         if (*src == L'\0') {
  45                 if (len != 0)
  46                         *dest = L'\0';
  47                 return (0);
  48         }
  49 
  50         if ((_collate_load_error) ||
  51             ((slen = _collate_wxfrm(src, dest, len)) == (size_t)-1)) {
  52                 goto error;
  53         }
  54 
  55         /* Add null termination at the correct location. */
  56         if (len > slen) {
  57                 dest[slen] = 0;
  58         } else if (len != 0) {
  59                 dest[len-1] = 0;
  60         }
  61 
  62         return (slen);
  63 
  64 error:
  65         slen = wcslen(src);
  66         if (slen < len)
  67                 (void) wcscpy(dest, src);
  68         else if (len != 0) {
  69                 (void) wcsncpy(dest, src, len - 1);
  70                 dest[len - 1] = L'\0';
  71         }
  72         return (slen);
  73 }