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/*

FUNCTION

        <<wcsncpy>>---copy part of a wide-character string

ANSI_SYNOPSIS

        #include <wchar.h>

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

TRAD_SYNOPSIS

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

        wchar_t *<[s1]>;

        const wchar_t *<[s2]>;

        size_t <[n]>;

DESCRIPTION

        The <<wcsncpy>> function copies not more than n wide-character codes

        (wide-character codes that follow a null wide-character code are not

        copied) from the array pointed to by <[s2]> to the array pointed to

        by <[s1]>. If copying takes place between objects that overlap, the

        behaviour is undefined.

        If the array pointed to by <[s2]> is a wide-character string that is

        shorter than <[n]> wide-character codes, null wide-character codes are

        appended to the copy in the array pointed to by <[s1]>, until <[n]>

        wide-character codes in all are written.

RETURNS

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

        indicate an error.

PORTABILITY

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

No supporting OS subroutines are required.

*/

/*      $NetBSD: wcsncpy.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: wcsncpy.c,v 1.1 1999/12/29 21:47:45 tshiozak Exp

 */

#include <_ansi.h>

#include <wchar.h>

wchar_t *

_DEFUN (wcsncpy, (s1, s2, n),

        wchar_t * s1 _AND

        _CONST wchar_t * s2 _AND

        size_t n)

{

  wchar_t *p;

  _CONST wchar_t *q;

  *s1 = '\0';

  p = s1;

  q = s2;

  while (n && *q)

    {

      *p++ = *q++;

      n--;

    }

  *p = '\0';

  return s1;

}