36 lines
2.3 KiB
C
36 lines
2.3 KiB
C
/*-*- 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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* Compares NUL-terminated strings w/ limit.
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*
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* @param a is first non-null NUL-terminated string pointer
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* @param b is second non-null NUL-terminated string pointer
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* @return is <0, 0, or >0 based on uint8_t comparison
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* @asyncsignalsafe
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*/
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int strncmp(const char *a, const char *b, size_t n) {
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size_t i = 0;
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if (!n-- || a == b) return 0;
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while (a[i] == b[i] && b[i] && i < n) ++i;
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return (a[i] & 0xff) - (b[i] & 0xff);
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}
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