1 files changed, 92 insertions, 0 deletions
diff --git a/lib/antlr/antlr/ParserSharedInputState.h b/lib/antlr/antlr/ParserSharedInputState.h
new file mode 100644
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+++ b/lib/antlr/antlr/ParserSharedInputState.h
@@ -0,0 +1,92 @@
+#ifndef INC_ParserSharedInputState_h__
+#define INC_ParserSharedInputState_h__
+
+/* ANTLR Translator Generator
+ * Project led by Terence Parr at http://www.jGuru.com
+ * Software rights: http://www.antlr.org/license.html
+ *
+ * $Id$
+ */
+
+#include <antlr/config.h>
+#include <antlr/TokenBuffer.h>
+#include <antlr/RefCount.h>
+#include <string>
+
+#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
+namespace antlr {
+#endif
+
+/** This object contains the data associated with an
+ * input stream of tokens.  Multiple parsers
+ * share a single ParserSharedInputState to parse
+ * the same stream of tokens.
+ */
+class ANTLR_API ParserInputState {
+public:
+	/** Construct a new ParserInputState
+	 * @param in the TokenBuffer to read from. The object is deleted together
+	 * with the ParserInputState object.
+	 */
+	ParserInputState( TokenBuffer* in )
+	: guessing(0)
+	, filename()
+	, input(in)
+	, inputResponsible(true)
+	{
+	}
+	/** Construct a new ParserInputState
+	 * @param in the TokenBuffer to read from.
+	 */
+	ParserInputState( TokenBuffer& in )
+	: guessing(0)
+	, filename("")
+	, input(&in)
+	, inputResponsible(false)
+	{
+	}
+
+	virtual ~ParserInputState()
+	{
+		if (inputResponsible)
+			delete input;
+	}
+
+	TokenBuffer& getInput( void )
+	{
+		return *input;
+	}
+
+	/// Reset the ParserInputState and the underlying TokenBuffer
+	void reset( void )
+	{
+		input->reset();
+		guessing = 0;
+	}
+
+public:
+	/** Are we guessing (guessing>0)? */
+	int guessing;
+	/** What file (if known) caused the problem?
+	 * @todo wrap this one..
+	 */
+	ANTLR_USE_NAMESPACE(std)string filename;
+private:
+	/** Where to get token objects */
+	TokenBuffer* input;
+	/// Do we need to free the TokenBuffer or is it owned by another..
+	bool inputResponsible;
+
+	// we don't want these:
+	ParserInputState(const ParserInputState&);
+	ParserInputState& operator=(const ParserInputState&);
+};
+
+/// A reference counted ParserInputState
+typedef RefCount<ParserInputState> ParserSharedInputState;
+
+#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
+}
+#endif
+
+#endif //INC_ParserSharedInputState_h__