fef
0f9e9f91a6
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)
88 lines
3 KiB
C
88 lines
3 KiB
C
/* See the end of this file for copyright and license terms. */
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#include <gay/types.h>
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#include <limits.h>
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#include <string.h>
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#define IDX(c) ((unsigned char)(c) / LONG_BIT)
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#define BIT(c) ((unsigned long)1 << ((unsigned char)(c) % LONG_BIT))
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usize strspn(const char *s, const char *charset)
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{
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/*
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* NB: idx and bit are temporaries whose use causes gcc 3.4.2 to
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* generate better code. Without them, gcc gets a little confused.
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*/
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const char *s1;
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unsigned long bit;
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unsigned long tbl[(UCHAR_MAX + 1) / LONG_BIT];
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int idx;
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if(*s == '\0')
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return (0);
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#if LONG_BIT == 64 /* always better to unroll on 64-bit architectures */
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tbl[3] = tbl[2] = tbl[1] = tbl[0] = 0;
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#else
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for (idx = 0; idx < sizeof(tbl) / sizeof(tbl[0]); idx++)
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tbl[idx] = 0;
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#endif
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for (; *charset != '\0'; charset++) {
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idx = IDX(*charset);
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bit = BIT(*charset);
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tbl[idx] |= bit;
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}
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for(s1 = s; ; s1++) {
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idx = IDX(*s1);
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bit = BIT(*s1);
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if ((tbl[idx] & bit) == 0)
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break;
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}
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return (s1 - s);
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}
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/*
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* This file is part of GayBSD.
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* Copyright (c) 2021 fef <owo@fef.moe>.
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*
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* GayBSD is nonviolent software: you may only use, redistribute, and/or
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* modify it under the terms of the Cooperative Nonviolent Public License
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* (CNPL) as found in the LICENSE file in the source code root directory
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* or at <https://git.pixie.town/thufie/npl-builder>; either version 7
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* of the license, or (at your option) any later version.
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*
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* GayBSD comes with ABSOLUTELY NO WARRANTY, to the extent
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* permitted by applicable law. See the CNPL for details.
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*
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* ==========================================================================
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*
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* This file is derived from FreeBSD source code.
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*
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* Copyright (c) 2005 David Schultz <das@FreeBSD.ORG>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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