cosmopolitan/libc/str/tinymemccpy.c

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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi
Copyright 2020 Justine Alexandra Roberts Tunney
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include "libc/str/str.h"
#include "libc/str/tinymemccpy.h"
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void *tinymemccpy(void *dst, const void *src, int termchar, size_t limit) {
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size_t i;
unsigned char *d;
const unsigned char *s;
for (termchar &= 0xff, d = dst, s = src, i = 0; i < limit; ++i) {
if ((d[i] = s[i]) == termchar) return d + i + 1;
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}
return NULL;
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}