From 26da2bbeb9781782b1242acc1668f649c336d65f Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Mon, 31 Aug 2015 04:15:39 +0200 Subject: add strlen and wcslen MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- src/wchar/wcslen.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 src/wchar/wcslen.c (limited to 'src/wchar') diff --git a/src/wchar/wcslen.c b/src/wchar/wcslen.c new file mode 100644 index 0000000..ad81227 --- /dev/null +++ b/src/wchar/wcslen.c @@ -0,0 +1,52 @@ +/** + * 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 +#include + + + +/** + * `wchar_t` version of `strlen`. + * + * @param str The string. + * @return The number of `wchar_t`:s before the + * first NUL character. + */ +size_t wcslen(const wchar_t* str) +{ + const wchar_t* s = str; + while (*s++); + return (size_t)(s - 1 - str); +} + + +/** + * `wchar_t` version of `strnlen`. + * + * @param str The string. + * @param maxlen The number of bytes to inspect, at most. + * @return The number of `wchar_t`:s before the + * first NUL character. `maxlen` if no + * NUL character was found. + */ +size_t wcsnlen(const wchar_t* str, size_t maxlen) +{ + const wchar_t* end = wmemchr(str, 0, maxlen); + return end == NULL ? maxlen : (size_t)(end - str); +} + -- cgit v1.2.3-70-g09d2