lib/libc/string/wcsncat.c

   1 /*-
   2  * Copyright (c)1999 Citrus Project,
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  *      citrus Id: wcsncat.c,v 1.1 1999/12/29 21:47:45 tshiozak Exp
  27  * $FreeBSD: head/lib/libc/string/wcsncat.c 188080 2009-02-03 17:58:20Z danger $
  28  */
  29
  30 #include <wchar.h>
  31
  32 wchar_t *
  33 wcsncat(wchar_t * __restrict s1, const wchar_t * __restrict s2, size_t n)
  34 {
  35         wchar_t *p;
  36         wchar_t *q;
  37         const wchar_t *r;
  38
  39         p = s1;
  40         while (*p)
  41                 p++;
  42         q = p;
  43         r = s2;
  44         while (*r && n) {
  45                 *q++ = *r++;
  46                 n--;
  47         }
  48         *q = '\0';
  49         return s1;
  50 }