146 lines
3.2 KiB
C++
146 lines
3.2 KiB
C++
#ifndef __PLASP__UTILS__PARSER_H
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#define __PLASP__UTILS__PARSER_H
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#include <iostream>
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#include <iterator>
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#include <sstream>
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#include <vector>
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#include <boost/filesystem.hpp>
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namespace plasp
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{
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namespace utils
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{
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////////////////////////////////////////////////////////////////////////////////////////////////////
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//
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// Parser
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//
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////////////////////////////////////////////////////////////////////////////////////////////////////
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class Parser
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{
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public:
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using Position = std::stringstream::pos_type;
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struct Coordinate
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{
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std::string sectionName;
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size_t row;
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size_t column;
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};
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struct StreamDelimiter
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{
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Position position;
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std::string sectionName;
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};
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public:
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explicit Parser();
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explicit Parser(std::string streamName, std::istream &istream);
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void readStream(std::string streamName, std::istream &istream);
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void readFile(const boost::filesystem::path &path);
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void reset();
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void seek(Position position);
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Position position() const;
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Coordinate coordinate() const;
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void setCaseSensitive(bool isCaseInsensitive = true);
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char currentCharacter() const;
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void advance();
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bool atEndOfStream() const;
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template<typename Type>
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Type parse();
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template<class CharacterPredicate, class WhiteSpacePredicate>
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std::string parseIdentifier(CharacterPredicate characterPredicate, WhiteSpacePredicate whiteSpacePredicate);
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template<class CharacterPredicate>
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std::string parseIdentifier(CharacterPredicate characterPredicate);
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template<typename Type>
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bool probe(const Type &expectedValue);
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template<typename Type>
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void expect(const Type &expectedValue);
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template<class WhiteSpacePredicate>
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void skipWhiteSpace(WhiteSpacePredicate whiteSpacePredicate);
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void skipWhiteSpace();
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void skipLine();
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std::string getLine();
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private:
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static const std::istreambuf_iterator<char> EndOfFile;
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private:
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void checkStream() const;
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uint64_t parseIntegerBody();
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mutable std::stringstream m_stream;
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std::vector<StreamDelimiter> m_streamDelimiters;
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bool m_isCaseSensitive;
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};
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<class CharacterPredicate, class WhiteSpacePredicate>
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std::string Parser::parseIdentifier(CharacterPredicate characterPredicate, WhiteSpacePredicate whiteSpacePredicate)
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{
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skipWhiteSpace(whiteSpacePredicate);
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std::string value;
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while (true)
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{
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const auto character = currentCharacter();
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if (!characterPredicate(character))
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return value;
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value.push_back(character);
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advance();
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}
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<class CharacterPredicate>
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std::string Parser::parseIdentifier(CharacterPredicate characterPredicate)
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{
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return parseIdentifier(characterPredicate,
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[&](const auto character)
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{
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return std::isspace(character);
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});
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<class WhiteSpacePredicate>
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void Parser::skipWhiteSpace(WhiteSpacePredicate whiteSpacePredicate)
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{
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checkStream();
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while (!atEndOfStream() && whiteSpacePredicate(currentCharacter()))
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advance();
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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}
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}
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#endif
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