kern/lib/c/string/wcsstr.c
fef 0f9e9f91a6
libc: port FreeBSD string library routines
Oh my fucking god this was by far the most awful
and boring and tedious day in my entire life.

Also, dear FreeBSD people: please don't sue me.
I tried really hard to comply with all the
copyright stuff, but it is absolutely possible i
made a mistake.  Just DM me and i'll do everything
in my power to fix it, even if that means
releasing entire portions of GayBSD under the BSD
license.  I don't care, i just want stuff to work.

(i'm including this message to use it as possible
evidence in case i get sued to show my good will)
2021-10-10 05:41:16 +02:00

76 lines
2.8 KiB
C

/* See the end of this file for copyright and license terms. */
#include <gay/types.h>
#include <wchar.h>
/*
* Find the first occurrence of find in s.
*/
wchar_t *wcsstr(const wchar_t *restrict s, const wchar_t *restrict find)
{
wchar_t c, sc;
usize len;
if ((c = *find++) != L'\0') {
len = wcslen(find);
do {
do {
if ((sc = *s++) == L'\0')
return NULL;
} while (sc != c);
} while (wcsncmp(s, find, len) != 0);
s--;
}
return (wchar_t *)s;
}
/*
* This file is part of GayBSD.
* Copyright (c) 2021 fef <owo@fef.moe>.
*
* GayBSD is nonviolent software: you may only use, redistribute, and/or
* modify it under the terms of the Cooperative Nonviolent Public License
* (CNPL) as found in the LICENSE file in the source code root directory
* or at <https://git.pixie.town/thufie/npl-builder>; either version 7
* of the license, or (at your option) any later version.
*
* GayBSD comes with ABSOLUTELY NO WARRANTY, to the extent
* permitted by applicable law. See the CNPL for details.
*
* ==========================================================================
*
* This file is derived from FreeBSD source code.
*
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* $FreeBSD$
*/