1 files changed, 132 insertions, 0 deletions
diff --git a/yaml-cpp/src/scanner.h b/yaml-cpp/src/scanner.h
new file mode 100755
index 00000000..bc8dcbe5
--- /dev/null
+++ b/yaml-cpp/src/scanner.h
@@ -0,0 +1,132 @@
+#ifndef SCANNER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define SCANNER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+#if defined(_MSC_VER) || (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4)) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
+
+#include <ios>
+#include <string>
+#include <queue>
+#include <stack>
+#include <set>
+#include <map>
+#include "ptr_vector.h"
+#include "stream.h"
+#include "token.h"
+
+namespace YAML
+{
+	class Node;
+	class RegEx;
+
+	class Scanner
+	{
+	public:
+		Scanner(std::istream& in);
+		~Scanner();
+
+		// token queue management (hopefully this looks kinda stl-ish)
+		bool empty();
+		void pop();
+		Token& peek();
+
+	private:
+		struct IndentMarker {
+			enum INDENT_TYPE { MAP, SEQ, NONE };
+			enum STATUS { VALID, INVALID, UNKNOWN };
+			IndentMarker(int column_, INDENT_TYPE type_): column(column_), type(type_), status(VALID), pStartToken(0) {}
+		
+			int column;
+			INDENT_TYPE type;
+			STATUS status;
+			Token *pStartToken;
+		};
+		
+		enum FLOW_MARKER { FLOW_MAP, FLOW_SEQ };
+	
+	private:	
+		// scanning
+		void EnsureTokensInQueue();
+		void ScanNextToken();
+		void ScanToNextToken();
+		void StartStream();
+		void EndStream();
+		Token *PushToken(Token::TYPE type);
+		
+		bool InFlowContext() const { return !m_flows.empty(); }
+		bool InBlockContext() const { return m_flows.empty(); }
+		int GetFlowLevel() const { return m_flows.size(); }
+		
+		Token::TYPE GetStartTokenFor(IndentMarker::INDENT_TYPE type) const;
+		IndentMarker *PushIndentTo(int column, IndentMarker::INDENT_TYPE type);
+		void PopIndentToHere();
+		void PopAllIndents();
+		void PopIndent();
+		int GetTopIndent() const;
+
+		// checking input
+		bool CanInsertPotentialSimpleKey() const;
+		bool ExistsActiveSimpleKey() const;
+		void InsertPotentialSimpleKey();
+		void InvalidateSimpleKey();
+		bool VerifySimpleKey();
+		void PopAllSimpleKeys();
+		
+		void ThrowParserException(const std::string& msg) const;
+
+		bool IsWhitespaceToBeEaten(char ch);
+		const RegEx& GetValueRegex() const;
+
+		struct SimpleKey {
+			SimpleKey(const Mark& mark_, int flowLevel_);
+
+			void Validate();
+			void Invalidate();
+			
+			Mark mark;
+			int flowLevel;
+			IndentMarker *pIndent;
+			Token *pMapStart, *pKey;
+		};
+
+		// and the tokens
+		void ScanDirective();
+		void ScanDocStart();
+		void ScanDocEnd();
+		void ScanBlockSeqStart();
+		void ScanBlockMapSTart();
+		void ScanBlockEnd();
+		void ScanBlockEntry();
+		void ScanFlowStart();
+		void ScanFlowEnd();
+		void ScanFlowEntry();
+		void ScanKey();
+		void ScanValue();
+		void ScanAnchorOrAlias();
+		void ScanTag();
+		void ScanPlainScalar();
+		void ScanQuotedScalar();
+		void ScanBlockScalar();
+
+	private:
+		// the stream
+		Stream INPUT;
+
+		// the output (tokens)
+		std::queue<Token> m_tokens;
+
+		// state info
+		bool m_startedStream, m_endedStream;
+		bool m_simpleKeyAllowed;
+		bool m_canBeJSONFlow;
+		std::stack<SimpleKey> m_simpleKeys;
+		std::stack<IndentMarker *> m_indents;
+		ptr_vector<IndentMarker> m_indentRefs; // for "garbage collection"
+		std::stack<FLOW_MARKER> m_flows;
+	};
+}
+
+#endif // SCANNER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+