lib/libc/locale/wcsxfrm.c

   1 /*      $NetBSD: wcsxfrm.c,v 1.2 2006/10/15 16:14:08 christos Exp $     */
   2
   3 /*-
   4  * Copyright (c)2003 Citrus Project,
   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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 <sys/cdefs.h>
  30 #if defined(LIBC_SCCS) && !defined(lint)
  31 __RCSID("$NetBSD: wcsxfrm.c,v 1.2 2006/10/15 16:14:08 christos Exp $");
  32 #endif /* LIBC_SCCS and not lint */
  33
  34 #include "namespace.h"
  35
  36 #include <assert.h>
  37 #include <wchar.h>
  38
  39 /*
  40  * Compare strings with using collating information.
  41  */
  42 size_t
  43 wcsxfrm(s1, s2, n)
  44         wchar_t *s1;
  45         const wchar_t *s2;
  46         size_t n;
  47 {
  48         size_t len;
  49
  50         /* XXX: LC_COLLATE should be implemented. */
  51
  52         len = wcslen(s2);
  53         if (len<n)
  54                 wcscpy(s1, s2);
  55         else {
  56                 /*
  57                  * SUSv3 says:
  58                  *   If the value returned is n or more, the contents
  59                  *   of the array pointed to by ws1 are unspecified.
  60                  */
  61                 /* thus, do nothing */
  62         }
  63
  64         return (len);
  65 }