diff --git a/HTMLKit/HTMLInputStreamReader.h b/HTMLKit/HTMLInputStreamReader.h
index f59d394..0ae10cd 100644
--- a/HTMLKit/HTMLInputStreamReader.h
+++ b/HTMLKit/HTMLInputStreamReader.h
@@ -23,4 +23,10 @@
 - (UTF32Char)currentInputCharacter;
 - (UTF32Char)nextInputCharacter;
 
+- (UTF32Char)consumeNextInputCharacter;
+- (void)unconsumeCurrentInputCharacter;
+
+- (void)markCurrentLocation;
+- (void)rewindToMarkedLocation;
+
 @end
diff --git a/HTMLKit/HTMLInputStreamReader.m b/HTMLKit/HTMLInputStreamReader.m
index e373791..beb18a6 100644
--- a/HTMLKit/HTMLInputStreamReader.m
+++ b/HTMLKit/HTMLInputStreamReader.m
@@ -65,6 +65,7 @@ NS_INLINE BOOL isControlOrUndefinedCharacter(UTF32Char character)
 	NSScanner *_scanner;
 	CFStringInlineBuffer _buffer;
 	NSUInteger _location;
+	NSUInteger _mark;
 	UTF32Char _currentInputCharacter;
 	NSUInteger _consume;
 	HTMLStreamReaderErrorCallback _errorCallback;
@@ -153,4 +154,16 @@ NS_INLINE BOOL isControlOrUndefinedCharacter(UTF32Char character)
 	_consume = 0;
 }
 
+- (void)markCurrentLocation
+{
+	_mark = _location;
+}
+
+- (void)rewindToMarkedLocation
+{
+	_location = _mark;
+	_scanner.scanLocation = _mark;
+	_consume = 0;
+}
+
 @end