From ea628b4d207f9ffd5bdd8b4bf6d4378b46268b98 Mon Sep 17 00:00:00 2001 From: Atanas Filipov Date: Sun, 8 Jul 2018 17:52:05 +0300 Subject: Initial commit --- src/strncmp.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 src/strncmp.c (limited to 'src/strncmp.c') diff --git a/src/strncmp.c b/src/strncmp.c new file mode 100644 index 0000000..8e84fd2 --- /dev/null +++ b/src/strncmp.c @@ -0,0 +1,58 @@ +/* + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is refactored by Atanas Filipov - it.feel.filipov@gmail.com + * + * 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. + */ + +#include +#include + +int strncmp(const char * s1, const char * s2, size_t n) +{assert((s1) && (s2)); + + if (n == 0) { + return (0); + } + + do { + + if (*s1 != *s2++) { + return (*(const unsigned char *)s1 - + *(const unsigned char *)(s2 - 1)); + } + + if (*s1++ == '\0') { + break; + } + + } while (--n != 0); + + return (0); +} -- cgit v1.2.3