From 5e57b83aae16d44318b9eed1b2cecd0591adc981 Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Tue, 17 Nov 2015 03:30:10 +0100 Subject: m + typo + split (almost all) string/*.c MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- src/string/memcmp.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 src/string/memcmp.c (limited to 'src/string/memcmp.c') diff --git a/src/string/memcmp.c b/src/string/memcmp.c new file mode 100644 index 0000000..112cdd1 --- /dev/null +++ b/src/string/memcmp.c @@ -0,0 +1,42 @@ +/** + * slibc — Yet another C library + * Copyright © 2015 Mattias Andrée (maandree@member.fsf.org) + * + * 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, either version 3 of the License, or + * (at your option) any later version. + * + * 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, see . + */ +#include + + + +/** + * Compare two memory segments alphabetically in a case sensitive manner. + * + * @param a A negative value is returned if this is the lesser. + * @param b A positive value is returned if this is the lesser. + * @param size The size of the segments. + * @return Zero is returned if `a` and `b` are equal, otherwise, + * see the specifications for `a` and `b`. + */ +int memcmp(const void* a, const void* b, size_t size) +{ + const signed char* s1 = a; + const signed char* s2 = b; + while (size--) + if (*s1 == *s2) + s1++, s2++; + else + return (int)(*s1 - *s2); + return 0; +} + -- cgit v1.2.3-70-g09d2