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author | Mattias Andrée <maandree@operamail.com> | 2015-11-17 03:30:10 +0100 |
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committer | Mattias Andrée <maandree@operamail.com> | 2015-11-17 03:30:10 +0100 |
commit | 5e57b83aae16d44318b9eed1b2cecd0591adc981 (patch) | |
tree | e1cf6290396be7c3251e95606c8a316058ce52a6 /src/string/strnlen.c | |
parent | split err.c (diff) | |
download | slibc-5e57b83aae16d44318b9eed1b2cecd0591adc981.tar.gz slibc-5e57b83aae16d44318b9eed1b2cecd0591adc981.tar.bz2 slibc-5e57b83aae16d44318b9eed1b2cecd0591adc981.tar.xz |
m + typo + split (almost all) string/*.c
Signed-off-by: Mattias Andrée <maandree@operamail.com>
Diffstat (limited to '')
-rw-r--r-- | src/string/strnlen.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/string/strnlen.c b/src/string/strnlen.c new file mode 100644 index 0000000..5473682 --- /dev/null +++ b/src/string/strnlen.c @@ -0,0 +1,36 @@ +/** + * 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 <http://www.gnu.org/licenses/>. + */ +#include <string.h> + + + +/** + * Variant of `strlen` that only inspects the + * beginning of a string. + * + * @param str The string. + * @param maxlen The number of bytes to inspect, at most. + * @return The number of bytes before, the first NUL byte. + * `maxlen` if no NUL byte was found. + */ +size_t strnlen(const char* str, size_t maxlen) +{ + const char* end = memchr(str, 0, maxlen); + return end == NULL ? maxlen : (size_t)(end - str); +} + |