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83 lines
2.1 KiB
C++
83 lines
2.1 KiB
C++
/*
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* JsonParser.h, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#pragma once
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#include "JsonNode.h"
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VCMI_LIB_NAMESPACE_BEGIN
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//Tiny string class that uses const char* as data for speed, members are private
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//for ease of debugging and some compatibility with std::string
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class constString
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{
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const char *data;
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const size_t datasize;
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public:
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constString(const char * inputString, size_t stringSize):
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data(inputString),
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datasize(stringSize)
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{
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}
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inline size_t size() const
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{
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return datasize;
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};
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inline const char& operator[] (size_t position)
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{
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assert (position < datasize);
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return data[position];
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}
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};
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//Internal class for string -> JsonNode conversion
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class JsonParser
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{
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std::string errors; // Contains description of all encountered errors
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constString input; // Input data
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ui32 lineCount; // Currently parsed line, starting from 1
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size_t lineStart; // Position of current line start
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size_t pos; // Current position of parser
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//Helpers
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bool extractEscaping(std::string &str);
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bool extractLiteral(const std::string &literal);
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bool extractString(std::string &string);
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bool extractWhitespace(bool verbose = true);
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bool extractSeparator();
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bool extractElement(JsonNode &node, char terminator);
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//Methods for extracting JSON data
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bool extractArray(JsonNode &node);
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bool extractFalse(JsonNode &node);
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bool extractFloat(JsonNode &node);
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bool extractNull(JsonNode &node);
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bool extractString(JsonNode &node);
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bool extractStruct(JsonNode &node);
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bool extractTrue(JsonNode &node);
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bool extractValue(JsonNode &node);
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//Add error\warning message to list
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bool error(const std::string &message, bool warning=false);
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public:
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JsonParser(const char * inputString, size_t stringSize);
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/// do actual parsing. filename is name of file that will printed to console if any errors were found
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JsonNode parse(const std::string & fileName);
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/// returns true if parsing was successful
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bool isValid();
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};
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VCMI_LIB_NAMESPACE_END
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