toolchain/gcc/newlib/libc/string/wcscat.c

   1 /*
   2 FUNCTION
   3         <<wcscat>>---concatenate two wide-character strings
   4 INDEX
   5         wcscat
   6
   7 ANSI_SYNOPSIS
   8         #include <wchar.h>
   9         wchar_t *wcscat(wchar_t *<[s1]>, const wchar_t *<[s2]>);
  10
  11 TRAD_SYNOPSIS
  12         wchar_t *wcscat(<[s1]>, <[s2]>
  13         wchar_t *<[s1]>;
  14         const wchar_t *<[s2]>;
  15
  16 DESCRIPTION
  17         The <<wcscat>> function appends a copy of the wide-character string
  18         pointed to by <[s2]> (including the terminating null wide-character
  19         code) to the end of the wide-character string pointed to by <[s1]>.
  20         The initial wide-character code of <[s2]> overwrites the null
  21         wide-character code at the end of <[s1]>. If copying takes place between
  22         objects that overlap, the behaviour is undefined.
  23
  24 RETURNS
  25         The <<wcscat>> function returns <[s1]>;
  26         no return value is reserved to indicate an error.
  27
  28 PORTABILITY
  29 <<wcscat>> is ISO/IEC 9899/AMD1:1995 (ISO C).
  30 No supporting OS subroutines are required.
  31 */
  32
  33 /*      $NetBSD: wcscat.c,v 1.1 2000/12/23 23:14:36 itojun Exp $        */
  34
  35 /*-
  36  * Copyright (c)1999 Citrus Project,
  37  * All rights reserved.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  * 1. Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  * 2. Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in the
  46  *    documentation and/or other materials provided with the distribution.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  *
  60  *      citrus Id: wcscat.c,v 1.1 1999/12/29 21:47:45 tshiozak Exp
  61  */
  62
  63 #include <_ansi.h>
  64 #include <wchar.h>
  65
  66 wchar_t *
  67 _DEFUN (wcscat, (s1, s2),
  68         wchar_t * s1 _AND
  69         _CONST wchar_t * s2)
  70 {
  71   wchar_t *p;
  72   wchar_t *q;
  73   _CONST wchar_t *r;
  74
  75   p = s1;
  76   while (*p)
  77     p++;
  78   q = p;
  79   r = s2;
  80   while (*r)
  81     *q++ = *r++;
  82   *q = '\0';
  83   return s1;
  84 }