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/*

FUNCTION

        <<wcslcpy>>---copy a wide-character string to specified length

ANSI_SYNOPSIS

        #include <wchar.h>

        size_t wcslcpy(wchar_t *<[dst]>, const wchar_t *<[src]>, size_t <[siz]>);

TRAD_SYNOPSIS

        #include <wchar.h>

        size_t wcslcpy(<[dst]>, <[src]>, <[siz]>)

        wchar_t *<[dst]>;

        const wchar_t *<[src]>;

        size_t <[siz]>;

DESCRIPTION

        <<wcslcpy>> copies wide characters from <[src]> to <[dst]>

        such that up to <[siz]> - 1 characters are copied.  A

        terminating null is appended to the result, unless <[siz]>

        is zero.

RETURNS

        <<wcslcpy>> returns the number of wide characters in <[src]>,

        not including the terminating null wide character.  If the

        return value is greater than or equal to <[siz]>, then

        not all wide characters were copied from <[src]> and truncation

        occurred.

PORTABILITY

No supporting OS subroutines are required.

*/

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

/*      from OpenBSD: strlcpy.c,v 1.4 1999/05/01 18:56:41 millert Exp   */

/*

 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>

 * 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.

 * 3. The name of the author may not be used to endorse or promote products

 *    derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED ``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 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.

 */

#include <_ansi.h>

#include <wchar.h>

/*

 * Copy src to string dst of size siz.  At most siz-1 characters

 * will be copied.  Always NUL terminates (unless siz == 0).

 * Returns wcslen(src); if retval >= siz, truncation occurred.

 */

size_t

_DEFUN (wcslcpy, (dst, src, siz),

        wchar_t * dst _AND

        _CONST wchar_t * src _AND

        size_t siz)

{

  wchar_t *d = dst;

  _CONST wchar_t *s = src;

  size_t n = siz;

  /* Copy as many bytes as will fit */

  if (n != 0 && --n != 0)

    {

      do

        {

          if ((*d++ = *s++) == 0)

            break;

        }

      while (--n != 0);

    }

  /* Not enough room in dst, add NUL and traverse rest of src */

  if (n == 0)

    {

      if (siz != 0)

        *d = '\0';              /* NUL-terminate dst */

      while (*s++)

        ;

    }

  return (s - src - 1);         /* count does not include NUL */

}