ArduinoJson/JsonParser/JsonParser.h

/*
* Arduino JSON library
* Benoit Blanchon 2014 - MIT License
*/

#pragma once

#include "JsonHashTable.h"
#include "JsonArray.h"

namespace ArduinoJson
{
    namespace Parser
    {
        /*
        * The JSON parser.
        *
        * You need to specifiy the number of token to be allocated for that parser.
        * Values from 16 to 32 are recommended.
        * The parser size will be MAX_TOKEN*8 bytes.
        * Don't forget that the memory size of standard Arduino board is only 2KB
        *
        * CAUTION: JsonArray and JsonHashTable contain pointers to tokens of the
        * JsonParser, so they need the JsonParser to be in memory to work.
        * As a result, you must not create JsonArray and JsonHashTable that have a
        * longer life that the JsonParser.
        */
        template <int MAX_TOKENS>
        class JsonParser
        {
        public:

            /*
            * Parse the JSON string and return a array.
            *
            * The content of the string may be altered to add '\0' at the
            * end of string tokens
            */
            JsonArray parseArray(char* json)
            {
                return JsonArray(json, parse(json));
            }

            /*
            * Parse the JSON string and return a array.
            *
            * The content of the string may be altered to add '\0' at the
            * end of string tokens
            */
            JsonHashTable parseHashTable(char* json)
            {
                return JsonHashTable(json, parse(json));
            }

        private:

            jsmntok_t* parse(char* json)
            {
                jsmn_parser parser;
                jsmn_init(&parser);

                if (JSMN_SUCCESS != jsmn_parse(&parser, json, tokens, MAX_TOKENS))
                    return 0;

                return tokens;
            }

            jsmntok_t tokens[MAX_TOKENS];
        };
    }
}