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/*

FUNCTION

	<>---copy part of a wide-character string returning a pointer to its end

ANSI_SYNOPSIS

	#include 

	wchar_t *wcpncpy(wchar_t *__restrict <[s1]>,

			 const wchar_t *__restrict <[s2]>, size_t <[n]>);

TRAD_SYNOPSIS

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

	wchar_t *__restrict <[s1]>;

	const wchar_t *__restrict <[s2]>;

	size_t <[n]>;

DESCRIPTION

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

	indicate an error.

PORTABILITY

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

No supporting OS subroutines are required.

*/

#include <_ansi.h>

#include 

wchar_t *

_DEFUN (wcpncpy, (dst, src, count),

	wchar_t *__restrict dst _AND

	_CONST wchar_t *__restrict src _AND

	size_t count)

{

  wchar_t *ret = NULL;

  while (count > 0)

    {

      --count;

      if ((*dst++ = *src++) == L'\0')

	{

	  ret = dst - 1;

	  break;

	}

    }

  while (count-- > 0)

    *dst++ = L'\0';

  return ret ? ret : dst;

}