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-rw-r--r--external_libs/yaml-cpp/src/scanner.h132
1 files changed, 132 insertions, 0 deletions
diff --git a/external_libs/yaml-cpp/src/scanner.h b/external_libs/yaml-cpp/src/scanner.h
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+++ b/external_libs/yaml-cpp/src/scanner.h
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+#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
+