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/*

FUNCTION

        <<wcsncat>>---concatenate part of two wide-character strings

ANSI_SYNOPSIS

        #include <wchar.h>

        wchar_t *wcsncat(wchar_t *<[s1]>, const wchar_t *<[s2]>, size_t <[n]>);

TRAD_SYNOPSIS

        wchar_t *wcsncat(<[s1]>, <[s2]>, <[n]>

        wchar_t *<[s1]>;

        const wchar_t *<[s2]>;

        size_t <[n]>;

DESCRIPTION

        The <<wcsncat>> function appends not more than <[n]> wide-character

        codes (a null wide-character code and wide-character codes that follow

        it are not appended) from the array pointed to by <[s2]> to the end of

        the wide-character string pointed to by <[s1]>. The initial

        wide-character code of <[s2]> overwrites the null wide-character code

        at the end of <[s1]>.

        A terminating null wide-character code is always appended to the result.

        If copying takes place between objects that overlap, the behaviour is

        undefined.

RETURNS

        The <<wcsncat>> function returns <[s1]>; no return value is reserved to

        indicate an error.

PORTABILITY

<<wcsncat>> is ISO/IEC 9899/AMD1:1995 (ISO C).

No supporting OS subroutines are required.

*/

/*      $NetBSD: wcsncat.c,v 1.1 2000/12/23 23:14:36 itojun Exp $       */

/*-

 * Copyright (c)1999 Citrus Project,

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *      citrus Id: wcsncat.c,v 1.1 1999/12/29 21:47:45 tshiozak Exp

 */

#include <_ansi.h>

#include <wchar.h>

wchar_t *

_DEFUN (wcsncat, (s1, s2, n),

        wchar_t * s1 _AND

        _CONST wchar_t * s2 _AND

        size_t n)

{

  wchar_t *p;

  wchar_t *q;

  _CONST wchar_t *r;

  p = s1;

  while (*p)

    p++;

  q = p;

  r = s2;

  while (*r && n)

    {

      *q++ = *r++;

      n--;

    }

  *q = '\0';

  return s1;

}