0,0 → 1,106 |
/* |
FUNCTION |
<<wcsstr>>---find a wide-character substring |
|
ANSI_SYNOPSIS |
#include <wchar.h> |
wchar_t *wcsstr(const wchar_t *__restrict <[big]>, |
const wchar_t *__restrict <[little]>); |
|
TRAD_SYNOPSIS |
wchar_t *wcsstr(<[big]>, <[little]> |
const wchar_t *__restrict <[big]>; |
const wchar_t *__restrict <[little]>; |
|
DESCRIPTION |
The <<wcsstr>> function locates the first occurrence in the |
wide-character string pointed to by <[big]> of the sequence of |
wide characters (excluding the terminating null wide character) in the |
wide-character string pointed to by <[little]>. |
|
RETURNS |
On successful completion, <<wcsstr>> returns a pointer to the located |
wide-character string, or a null pointer if the wide-character string |
is not found. |
|
If <[little]> points to a wide-character string with zero length, |
the function returns <[big]>. |
|
PORTABILITY |
<<wcsstr>> is ISO/IEC 9899/AMD1:1995 (ISO C). |
|
*/ |
|
/* $NetBSD: wcsstr.c,v 1.1 2000/12/23 23:14:37 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: wcsstr.c,v 1.2 2000/12/21 05:07:25 itojun Exp |
*/ |
|
#include <_ansi.h> |
#include <stddef.h> |
#include <wchar.h> |
|
wchar_t * |
_DEFUN (wcsstr, (big, little), |
_CONST wchar_t *__restrict big _AND |
_CONST wchar_t *__restrict little) |
{ |
_CONST wchar_t *p; |
_CONST wchar_t *q; |
_CONST wchar_t *r; |
|
if (!*little) |
{ |
/* LINTED interface specification */ |
return (wchar_t *) big; |
} |
if (wcslen (big) < wcslen (little)) |
return NULL; |
|
p = big; |
q = little; |
while (*p) |
{ |
q = little; |
r = p; |
while (*q) |
{ |
if (*r != *q) |
break; |
q++; |
r++; |
} |
if (!*q) |
{ |
/* LINTED interface specification */ |
return (wchar_t *) p; |
} |
p++; |
} |
return NULL; |
} |