From c99cadbe02f659264cecb44c053d96383631147d Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Tue, 17 Nov 2015 05:50:23 +0100 Subject: rearrange files MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- src/string/str/strchr.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 src/string/str/strchr.c (limited to 'src/string/str/strchr.c') diff --git a/src/string/str/strchr.c b/src/string/str/strchr.c new file mode 100644 index 0000000..0ed53b4 --- /dev/null +++ b/src/string/str/strchr.c @@ -0,0 +1,46 @@ +/** + * 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 + + +# pragma GCC diagnostic ignored "-Wdiscarded-qualifiers" + + + +/** + * Find the first occurrence of a byte in a string. + * + * `s = strchr(s, 0)` is a faster alternative to + * `s = s + strlen(s)`. + * + * @param string The string to search. + * The terminating NUL character is + * considered a part of the string. + * @param c The sought after character. + * @return Pointer to the first occurrence of `c`, + * `NULL` if none were found. + */ +char* (strchr)(const char* string, int c) +{ + for (;;) + if (*string == c) + return string; + else if (!*string++) + return NULL; +} + -- cgit v1.2.3-70-g09d2