Parser.h

/*
 *  json::Parser class interface
 *
 *  This file is part of OTAWA
 *  Copyright (c) 2016, IRIT UPS.
 *
 *  OTAWA is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  OTAWA is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with OTAWA; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef ELM_JSON_PARSER_H_
#define ELM_JSON_PARSER_H_
 
#include "common.h"
#include <elm/io.h>
#include <elm/sys/Path.h>
 
namespace elm { namespace json {
 
class Maker {
public:
    virtual ~Maker(void);
    virtual void beginObject(void);
    virtual void endObject(void);
    virtual void beginArray(void);
    virtual void endArray(void);
    virtual void onField(string name);
    virtual void onNull(void);
    virtual void onValue(bool value);
    virtual void onValue(int value);
    virtual void onValue(double value);
    virtual void onValue(string value);
};
 
class Parser {
public:
    Parser(Maker& maker);
    void parse(string s);
    inline void parse(cstring s) { parse(string(s)); }
    inline void parse(const char *s) { parse(string(s)); }
    void parse(io::InStream& in);
    void parse(sys::Path path);
 
private:
    typedef enum {
        NONE = 0,
        LBRACE,
        RBRACE,
        LBRACK,
        RBRACK,
        _NULL,
        TRUE,
        FALSE,
        INT,
        FLOAT,
        STRING,
        COMMA,
        COLON
    } token_t;
 
    void doParsing(io::InStream& in);
    token_t parseNumber(io::InStream& in, char c, int base = 10);
    void parseObject(io::InStream& in);
    void parseArray(io::InStream& in);
    void parseValue(io::InStream& in, token_t t);
    void parseString(io::InStream& in, char c);
    void parseLitt(io::InStream& in, cstring litt);
    void parseComment(io::InStream& in);
    token_t parseBasedNumber(io::InStream& in);
 
    void error(string message);
    token_t next(io::InStream& in);
    char nextChar(io::InStream& in);
    void pushBack(char c);
 
    Maker& m;
    int line, col;
    String text;
    char prev;
};
 
} }     // elm::json
 
#endif /* ELM_JSON_PARSER_H_ */