diff --git a/SmallIntSet.c b/SmallIntSet.c
new file mode 100644
index 0000000..a5c22bd
--- /dev/null
+++ b/SmallIntSet.c
@@ -0,0 +1,27 @@
+//
+//  SmallIntSet.c
+//  JSParser
+//
+//  Created by Sven Weidauer on 06.04.11.
+//  Copyright 2011 __MyCompanyName__. All rights reserved.
+//
+
+#include "SmallIntSet.h"
+
+#include <stdarg.h>
+
+SmallIntSet_t SmallIntSetWithValues( size_t count, ... )
+{
+    va_list args;
+    va_start( args, count );
+    
+    SmallIntSet_t result = SMALLINTSET_EMPTY;
+    for (size_t i = 0; i < count; ++i) {
+        uint8_t value = va_arg( args, uint8_t );
+        result |= SmallIntSetWithValue( value );
+    }
+    
+    va_end( args );
+    
+    return result;
+}
\ No newline at end of file
diff --git a/SmallIntSet.h b/SmallIntSet.h
new file mode 100644
index 0000000..899c64e
--- /dev/null
+++ b/SmallIntSet.h
@@ -0,0 +1,42 @@
+//
+//  SmallIntSet.h
+//  JSParser
+//
+//  Created by Sven Weidauer on 06.04.11.
+//  Copyright 2011 __MyCompanyName__. All rights reserved.
+//
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <limits.h>
+#include <assert.h>
+#include <unistd.h>
+
+typedef uint64_t SmallIntSet_t;
+#define SMALLINTSET_MAX_VALUE ((sizeof(SmallIntSet_t) * CHAR_BIT) - 1)
+#define SMALLINTSET_EMPTY ((SmallIntSet_t)0)
+
+#define PURE __attribute__ (( pure ))
+
+PURE static inline SmallIntSet_t SmallIntSetWithValue( uint8_t value )
+{
+    assert( 0 <= value && value <= SMALLINTSET_MAX_VALUE );
+    return ((SmallIntSet_t)1) << value;
+}
+
+PURE static inline SmallIntSet_t SmallIntSetByAddingValue( SmallIntSet_t set, uint8_t value )
+{
+    return set | SmallIntSetWithValue( value );
+}
+
+PURE static inline SmallIntSet_t SmallIntSetByRemovingValue( SmallIntSet_t set, uint8_t value )
+{
+    return set & ~SmallIntSetWithValue( value );
+}
+
+PURE static inline bool SmallIntSetContainsValue( SmallIntSet_t set, uint8_t value )
+{
+    return (set & SmallIntSetWithValue( value )) != 0;
+}
+
+PURE SmallIntSet_t SmallIntSetWithValues( size_t count, ... );
\ No newline at end of file