string/FreeBSD/wcsxfrm.c

   1 /*-
   2  * Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
   3  *              at Electronni Visti IA, Kiev, Ukraine.
   4  *                      All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  */
  27
  28 #include <sys/cdefs.h>
  29 #if 0
  30 __FBSDID("FreeBSD: src/lib/libc/string/strxfrm.c,v 1.15 2002/09/06 11:24:06 tjr Exp ");
  31 #endif
  32 __FBSDID("$FreeBSD: src/lib/libc/string/wcsxfrm.c,v 1.3 2004/04/07 09:47:56 tjr Exp $");
  33
  34 #include "xlocale_private.h"
  35
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <wchar.h>
  39 #include <errno.h>
  40 #include "collate.h"
  41
  42 #define WCS_XFRM_OFFSET 1
  43
  44 size_t
  45 wcsxfrm_l(wchar_t * __restrict dest, const wchar_t * __restrict src, size_t len,
  46     locale_t loc)
  47 {
  48         size_t slen;
  49         wchar_t *xf[2];
  50         int sverrno;
  51
  52         if (*src == L'\0') {
  53                 if (len != 0)
  54                         *dest = L'\0';
  55                 return (0);
  56         }
  57
  58         NORMALIZE_LOCALE(loc);
  59         if (loc->__collate_load_error) {
  60                 slen = wcslen(src);
  61                 if (len > 0) {
  62                         if (slen < len)
  63                                 wcscpy(dest, src);
  64                         else {
  65                                 wcsncpy(dest, src, len - 1);
  66                                 dest[len - 1] = L'\0';
  67                         }
  68                 }
  69                 return (slen);
  70         }
  71
  72         __collate_xfrm(src, xf, loc);
  73
  74         slen = wcslen(xf[0]);
  75         if (xf[1])
  76                 slen += wcslen(xf[1]) + 1;
  77         if (len > 0) {
  78                 wchar_t *w = xf[0];
  79                 while (len > 1) {
  80                         if (!*w)
  81                                 break;
  82                         *dest++ = *w++ + WCS_XFRM_OFFSET;
  83                         len--;
  84                 }
  85                 if ((w = xf[1]) != NULL) {
  86                         if (len > 1)
  87                                 *dest++ = WCS_XFRM_OFFSET;
  88                         while (len > 1) {
  89                                 if (!*w)
  90                                         break;
  91                                 *dest++ = *w++ + WCS_XFRM_OFFSET;
  92                                 len--;
  93                         }
  94                 }
  95                 *dest = 0;
  96         }
  97         sverrno = errno;
  98         free(xf[0]);
  99         free(xf[1]);
 100         errno = sverrno;
 101
 102         return (slen);
 103 }
 104
 105 size_t
 106 wcsxfrm(wchar_t * __restrict dest, const wchar_t * __restrict src, size_t len)
 107 {
 108         return wcsxfrm_l(dest, src, len, __current_locale());
 109 }