add strlen and wcslen

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 64 insertions, 0 deletions

diff --git a/include/wchar.h b/include/wchar.h
new file mode 100644
index 0000000..c9901d2
--- /dev/null
+++ b/include/wchar.h
@@ -0,0 +1,64 @@
+/**
+ * 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/>.
+ */
+#ifndef _WCHAR_H
+#define _WCHAR_H
+#ifndef _PORTABLE_SOURCE /* `wchar_t` is not portable. */
+#include <slibc/version.h>
+
+
+#include <slibc/features.h>
+
+
+
+#define __NEED_size_t
+#define __NEED_wchar_t
+
+#include <bits/types.h>
+
+
+/**
+ * `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*)
+  __GCC_ONLY(__attribute__((nonnull, warn_unused_result)));
+
+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) || \
+    defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || \
+    defined(_BSD_SOURCE)
+/**
+ * `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*, size_t)
+  __GCC_ONLY(__attribute__((warn_unused_result)));
+#endif
+
+
+
+#endif
+#endif
+