Convert libc to C.

libc/string/strcspn.c

@@ -0,0 +1,49 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2014.
+
+    This file is part of the Sortix C Library.
+
+    The Sortix C Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or (at your
+    option) any later version.
+
+    The Sortix C Library 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 Lesser General Public
+    License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
+
+    string/strcspn.c
+    Search a string for a set of characters.
+
+*******************************************************************************/
+
+#include <stdbool.h>
+#include <string.h>
+
+size_t strcspn(const char* str, const char* reject)
+{
+	size_t reject_length = 0;
+	while ( reject[reject_length] )
+		reject_length++;
+	for ( size_t result = 0; true; result++ )
+	{
+		char c = str[result];
+		if ( !c )
+			return result;
+		bool matches = false;
+		for ( size_t i = 0; i < reject_length; i++ )
+		{
+			if ( str[result] != reject[i] )
+				continue;
+			matches = true;
+			break;
+		}
+		if ( matches )
+			return result;
+	}
+}