wcsxfrm.c

来自「Newlib 嵌入式 C库 标准实现代码」· C语言 代码 · 共 53 行

/*
FUNCTION
	<<wcsxfrm>>---locale-specific wide-character string transformation
	
INDEX
	wcsxfrm

ANSI_SYNOPSIS
	#include <wchar.h>
	int wcsxfrm(wchar_t *<[stra]>, const wchar_t * <[strb]>, size_t <[n]>);

TRAD_SYNOPSIS
	#include <wchar.h>
	size_t wcsxfrm(<[stra]>, <[strb]>, <[n]>)
	wchar_t *<[stra]>;
	wchar_t *<[strb]>;
	size_t   <[n]>

DESCRIPTION
	<<wcsxfrm>> transforms the wide-character string pointed to by
	<[strb]> to the wide-character string pointed to by <[stra]>,
	Comparing two transformed wide strings with <<wcscmp>> should return
	the same result as comparing the original strings with <<wcscoll>>.
	No more than <[n]> wide characters are transformed, including the
	trailing null character.

	If <[n]> is 0, <[stra]> may be a NULL pointer.

	The current implementation of <<wcsxfrm>> simply uses <<wcslcpy>>
	and does not support any language-specific transformations.

RETURNS
	<<wcsxfrm>> returns the length of the transformed wide character
	string.  if the return value is greater or equal to <[n]>, the
	content of <[stra]> is undefined.

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

#include <_ansi.h>
#include <wchar.h>

size_t
_DEFUN (wcsxfrm, (a, b, n),
	wchar_t *a _AND
	_CONST wchar_t *b _AND
	size_t n)

{
  return wcslcpy (a, b, n);
}