1 files changed, 48 insertions, 0 deletions
diff --git a/src/wchar/wcsrchr.c b/src/wchar/wcsrchr.c
new file mode 100644
index 0000000..3f6e84c
--- /dev/null
+++ b/src/wchar/wcsrchr.c
@@ -0,0 +1,48 @@
+/**
+ * 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 <wchar.h>
+
+
+# pragma GCC diagnostic ignored "-Wdiscarded-qualifiers"
+
+
+
+/**
+ * Find the last occurrence of a wide character in a string.
+ * 
+ * For improved performace, use `wmemrchr` instead of
+ * this function if you already know the length of the
+ * string.
+ * 
+ * @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 last occurrence of `c`,
+ *                  `NULL` if none were found.
+ */
+wchar_t* (wcsrchr)(const wchar_t* string, wchar_t c)
+{
+  wchar_t* r = NULL;
+  for (;;)
+    if (*string == c)
+      r = string;
+    else if (!*string++)
+      return c ? r : (string - 1);
+}
+