reader.h
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00001 #ifndef CPPTL_JSON_READER_H_INCLUDED
00002 # define CPPTL_JSON_READER_H_INCLUDED
00003 
00004 # include "features.h"
00005 # include "value.h"
00006 # include <deque>
00007 # include <stack>
00008 # include <string>
00009 # include <iostream>
00010 
00011 namespace Json {
00012 
00016    class JSON_API Reader
00017    {
00018    public:
00019       typedef char Char;
00020       typedef const Char *Location;
00021 
00025       Reader();
00026 
00030       Reader( const Features &features );
00031 
00042       bool parse( const std::string &document, 
00043                   Value &root,
00044                   bool collectComments = true );
00045 
00056       bool parse( const char *beginDoc, const char *endDoc, 
00057                   Value &root,
00058                   bool collectComments = true );
00059 
00062       bool parse( std::istream &is,
00063                   Value &root,
00064                   bool collectComments = true );
00065 
00071       std::string getFormatedErrorMessages() const;
00072 
00073    private:
00074       enum TokenType
00075       {
00076          tokenEndOfStream = 0,
00077          tokenObjectBegin,
00078          tokenObjectEnd,
00079          tokenArrayBegin,
00080          tokenArrayEnd,
00081          tokenString,
00082          tokenNumber,
00083          tokenTrue,
00084          tokenFalse,
00085          tokenNull,
00086          tokenArraySeparator,
00087          tokenMemberSeparator,
00088          tokenComment,
00089          tokenError
00090       };
00091 
00092       class Token
00093       {
00094       public:
00095          TokenType type_;
00096          Location start_;
00097          Location end_;
00098       };
00099 
00100       class ErrorInfo
00101       {
00102       public:
00103          Token token_;
00104          std::string message_;
00105          Location extra_;
00106       };
00107 
00108       typedef std::deque<ErrorInfo> Errors;
00109 
00110       bool expectToken( TokenType type, Token &token, const char *message );
00111       bool readToken( Token &token );
00112       void skipSpaces();
00113       bool match( Location pattern, 
00114                   int patternLength );
00115       bool readComment();
00116       bool readCStyleComment();
00117       bool readCppStyleComment();
00118       bool readString();
00119       void readNumber();
00120       bool readValue();
00121       bool readObject( Token &token );
00122       bool readArray( Token &token );
00123       bool decodeNumber( Token &token );
00124       bool decodeString( Token &token );
00125       bool decodeString( Token &token, std::string &decoded );
00126       bool decodeDouble( Token &token );
00127       bool decodeUnicodeCodePoint( Token &token, 
00128                                    Location &current, 
00129                                    Location end, 
00130                                    unsigned int &unicode );
00131       bool decodeUnicodeEscapeSequence( Token &token, 
00132                                         Location &current, 
00133                                         Location end, 
00134                                         unsigned int &unicode );
00135       bool addError( const std::string &message, 
00136                      Token &token,
00137                      Location extra = 0 );
00138       bool recoverFromError( TokenType skipUntilToken );
00139       bool addErrorAndRecover( const std::string &message, 
00140                                Token &token,
00141                                TokenType skipUntilToken );
00142       void skipUntilSpace();
00143       Value &currentValue();
00144       Char getNextChar();
00145       void getLocationLineAndColumn( Location location,
00146                                      int &line,
00147                                      int &column ) const;
00148       std::string getLocationLineAndColumn( Location location ) const;
00149       void addComment( Location begin, 
00150                        Location end, 
00151                        CommentPlacement placement );
00152       void skipCommentTokens( Token &token );
00153    
00154       typedef std::stack<Value *> Nodes;
00155       Nodes nodes_;
00156       Errors errors_;
00157       std::string document_;
00158       Location begin_;
00159       Location end_;
00160       Location current_;
00161       Location lastValueEnd_;
00162       Value *lastValue_;
00163       std::string commentsBefore_;
00164       Features features_;
00165       bool collectComments_;
00166    };
00167 
00192    std::istream& operator>>( std::istream&, Value& );
00193 
00194 } // namespace Json
00195 
00196 #endif // CPPTL_JSON_READER_H_INCLUDED


bwi_tools
Author(s): Piyush Khandelwal
autogenerated on Fri Aug 28 2015 10:14:30