parser.hpp

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#ifndef _json_parser_hpp_
#define _json_parser_hpp_

/*
 * Copyright (c) 2017 Andrew Haisley
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */


#include <istream>

#include "common.hpp"
#include "json.hpp"
#include "reader.hpp"
#include "lexer.hpp"

namespace NAMESPACE
{
    std::istream &operator>>(std::istream &stream, json &e);

    void operator>>(std::string &stream, json &e);

    class parser
    {
    public:

        static const size_t max_message_length = 10*1024*1024;

        static const size_t max_token_length = 100*1024;

        static const size_t max_nesting_depth = 1000;

        static std::unique_ptr<json> parse(std::istream &i);

#ifndef _ARGO_WINDOWS_

        static std::unique_ptr<json> parse(int fd);
#endif

        static std::unique_ptr<json> parse(FILE *f);

        static std::unique_ptr<json> parse(const char *s);

        static std::unique_ptr<json> parse(const std::string &s);

        static std::unique_ptr<json> load(const std::string &file_name);

        parser(
            reader &r,
            bool   read_all = true,
            size_t p_max_token_length = max_token_length,
            size_t p_max_nesting_depth = max_nesting_depth,
            bool   p_convert_numbers = true,
            bool   p_fallback_to_double = true,
            bool   p_convert_strings = true);

        std::unique_ptr<json> parse();

    private:

        std::unique_ptr<json> parse_number_int(const token &t);
        std::unique_ptr<json> parse_number_double(const token &t);
        std::unique_ptr<json> parse_string(const token &t);
        std::unique_ptr<json> parse_value(lexer &l, size_t nesting_depth);
        std::unique_ptr<json> parse_array(lexer &l, size_t nesting_depth);
        void parse_name_value_pair(lexer &l, std::unique_ptr<json> &object, size_t nesting_depth);
        std::unique_ptr<json> parse_object(lexer &l, size_t nesting_depth);

        reader &m_reader;

        bool m_read_all;

        size_t m_max_token_length;

        size_t m_max_nesting_depth;

        bool m_convert_numbers;

        bool m_fallback_to_double;

        bool m_convert_strings;

    };
}

#endif