43 lines
2.5 KiB
C
43 lines
2.5 KiB
C
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/str/str.h"
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/**
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* Prepares static search buffer.
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*
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* 1. If SRC is too long, it's truncated and *not* NUL-terminated.
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* 2. If SRC is too short, the remainder is zero-filled.
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*
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* Please note this function isn't designed to prevent untrustworthy
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* data from modifying memory without authorization. Consider trying
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* memccpy() for that purpose.
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*
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* @return dest + stride
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* @see stncpy(), memccpy()
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* @asyncsignalsafe
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*/
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char *stpncpy(char *dest, const char *src, size_t stride) {
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char *p;
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if ((p = memccpy(dest, src, '\0', stride))) {
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memset(p, 0, dest + stride - p);
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}
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return dest + stride;
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}
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