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/*

FUNCTION

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

ANSI_SYNOPSIS

	#include 

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

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

TRAD_SYNOPSIS

	wchar_t *wcsncpy(<[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.  Note that if <[s1]> contains more than <[n]>

	wide characters before its terminating null, the result is not

	null-terminated.

	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

ISO/IEC 9899; POSIX.1.

No supporting OS subroutines are required.

*/

#include <_ansi.h>

#include 

wchar_t *

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

	wchar_t *__restrict s1 _AND

	_CONST wchar_t *__restrict s2 _AND

	size_t n)

{

  wchar_t *dscan=s1;

  while(n > 0)

    {

      --n;

      if((*dscan++ = *s2++) == L'\0')  break;

    }

  while(n-- > 0)  *dscan++ = L'\0';

  return s1;

}