mirror of
https://github.com/eledio-devices/thirdparty-ArduinoJson.git
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108 lines
3.2 KiB
C++
108 lines
3.2 KiB
C++
// Copyright Benoit Blanchon 2014-2017
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// MIT License
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//
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// Arduino JSON library
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// https://bblanchon.github.io/ArduinoJson/
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// If you like this project, please add a star!
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#pragma once
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#include "../JsonBuffer.hpp"
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#include "../JsonVariant.hpp"
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#include "../TypeTraits/IsConst.hpp"
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#include "StringWriter.hpp"
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namespace ArduinoJson {
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namespace Internals {
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// Parse JSON string to create JsonArrays and JsonObjects
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// This internal class is not indended to be used directly.
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// Instead, use JsonBuffer.parseArray() or .parseObject()
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template <typename TReader, typename TWriter>
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class JsonParser {
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public:
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JsonParser(JsonBuffer *buffer, TReader reader, TWriter writer,
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uint8_t nestingLimit)
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: _buffer(buffer),
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_reader(reader),
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_writer(writer),
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_nestingLimit(nestingLimit) {}
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JsonArray &parseArray();
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JsonObject &parseObject();
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JsonVariant parseVariant() {
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JsonVariant result;
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parseAnythingTo(&result);
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return result;
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}
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private:
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JsonParser &operator=(const JsonParser &); // non-copiable
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static bool eat(TReader &, char charToSkip);
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FORCE_INLINE bool eat(char charToSkip) {
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return eat(_reader, charToSkip);
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}
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const char *parseString();
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bool parseAnythingTo(JsonVariant *destination);
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FORCE_INLINE bool parseAnythingToUnsafe(JsonVariant *destination);
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inline bool parseArrayTo(JsonVariant *destination);
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inline bool parseObjectTo(JsonVariant *destination);
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inline bool parseStringTo(JsonVariant *destination);
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static inline bool isInRange(char c, char min, char max) {
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return min <= c && c <= max;
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}
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static inline bool isLetterOrNumber(char c) {
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return isInRange(c, '0', '9') || isInRange(c, 'a', 'z') ||
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isInRange(c, 'A', 'Z') || c == '+' || c == '-' || c == '.';
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}
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static inline bool isQuote(char c) {
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return c == '\'' || c == '\"';
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}
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JsonBuffer *_buffer;
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TReader _reader;
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TWriter _writer;
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uint8_t _nestingLimit;
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};
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template <typename TJsonBuffer, typename TString, typename Enable = void>
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struct JsonParserBuilder {
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typedef typename Internals::StringTraits<TString>::Reader InputReader;
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typedef JsonParser<InputReader, TJsonBuffer &> TParser;
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static TParser makeParser(TJsonBuffer *buffer, TString &json,
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uint8_t nestingLimit) {
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return TParser(buffer, InputReader(json), *buffer, nestingLimit);
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}
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};
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template <typename TJsonBuffer, typename TChar>
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struct JsonParserBuilder<
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TJsonBuffer, TChar *,
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typename TypeTraits::EnableIf<!TypeTraits::IsConst<TChar>::value>::type> {
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typedef typename Internals::StringTraits<TChar *>::Reader TReader;
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typedef StringWriter<TChar> TWriter;
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typedef JsonParser<TReader, TWriter> TParser;
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static TParser makeParser(TJsonBuffer *buffer, TChar *json,
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uint8_t nestingLimit) {
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return TParser(buffer, TReader(json), TWriter(json), nestingLimit);
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}
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};
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template <typename TJsonBuffer, typename TString>
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inline typename JsonParserBuilder<TJsonBuffer, TString>::TParser makeParser(
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TJsonBuffer *buffer, TString &json, uint8_t nestingLimit) {
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return JsonParserBuilder<TJsonBuffer, TString>::makeParser(buffer, json,
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nestingLimit);
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}
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}
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}
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