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// ArduinoJson - arduinojson.org
// Copyright Benoit Blanchon 2014-2018
// MIT License
#pragma once
#include "Comments.hpp"
#include "JsonParser.hpp"
template <typename TReader, typename TWriter>
inline bool ArduinoJson::Internals::JsonParser<TReader, TWriter>::eat(
TReader &reader, char charToSkip) {
skipSpacesAndComments(reader);
if (reader.current() != charToSkip) return false;
reader.move();
return true;
}
template <typename TReader, typename TWriter>
inline bool
ArduinoJson::Internals::JsonParser<TReader, TWriter>::parseAnythingTo(
JsonVariant *destination) {
skipSpacesAndComments(_reader);
switch (_reader.current()) {
case '[':
return parseArrayTo(destination);
case '{':
return parseObjectTo(destination);
default:
return parseStringTo(destination);
}
}
template <typename TReader, typename TWriter>
inline ArduinoJson::JsonArray &
ArduinoJson::Internals::JsonParser<TReader, TWriter>::parseArray() {
if (_nestingLimit == 0) return JsonArray::invalid();
_nestingLimit--;
// Create an empty array
JsonArray &array = _buffer->createArray();
// Check opening braket
if (!eat('[')) goto ERROR_MISSING_BRACKET;
if (eat(']')) goto SUCCESS_EMPTY_ARRAY;
// Read each value
for (;;) {
// 1 - Parse value
JsonVariant value;
if (!parseAnythingTo(&value)) goto ERROR_INVALID_VALUE;
if (!array.add(value)) goto ERROR_NO_MEMORY;
// 2 - More values?
if (eat(']')) goto SUCCES_NON_EMPTY_ARRAY;
if (!eat(',')) goto ERROR_MISSING_COMMA;
}
SUCCESS_EMPTY_ARRAY:
SUCCES_NON_EMPTY_ARRAY:
_nestingLimit++;
return array;
ERROR_INVALID_VALUE:
ERROR_MISSING_BRACKET:
ERROR_MISSING_COMMA:
ERROR_NO_MEMORY:
return JsonArray::invalid();
}
template <typename TReader, typename TWriter>
inline bool ArduinoJson::Internals::JsonParser<TReader, TWriter>::parseArrayTo(
JsonVariant *destination) {
JsonArray &array = parseArray();
if (!array.success()) return false;
*destination = array;
return true;
}
template <typename TReader, typename TWriter>
inline ArduinoJson::JsonObject &
ArduinoJson::Internals::JsonParser<TReader, TWriter>::parseObject() {
if (_nestingLimit == 0) return JsonObject::invalid();
_nestingLimit--;
// Create an empty object
JsonObject &object = _buffer->createObject();
// Check opening brace
if (!eat('{')) goto ERROR_MISSING_BRACE;
if (eat('}')) goto SUCCESS_EMPTY_OBJECT;
// Read each key value pair
for (;;) {
// 1 - Parse key
const char *key = parseString();
if (!key) goto ERROR_INVALID_KEY;
if (!eat(':')) goto ERROR_MISSING_COLON;
// 2 - Parse value
JsonVariant value;
if (!parseAnythingTo(&value)) goto ERROR_INVALID_VALUE;
if (!object.set(key, value)) goto ERROR_NO_MEMORY;
// 3 - More keys/values?
if (eat('}')) goto SUCCESS_NON_EMPTY_OBJECT;
if (!eat(',')) goto ERROR_MISSING_COMMA;
}
SUCCESS_EMPTY_OBJECT:
SUCCESS_NON_EMPTY_OBJECT:
_nestingLimit++;
return object;
ERROR_INVALID_KEY:
ERROR_INVALID_VALUE:
ERROR_MISSING_BRACE:
ERROR_MISSING_COLON:
ERROR_MISSING_COMMA:
ERROR_NO_MEMORY:
return JsonObject::invalid();
}
template <typename TReader, typename TWriter>
inline bool ArduinoJson::Internals::JsonParser<TReader, TWriter>::parseObjectTo(
JsonVariant *destination) {
JsonObject &object = parseObject();
if (!object.success()) return false;
*destination = object;
return true;
}
template <typename TReader, typename TWriter>
inline const char *
ArduinoJson::Internals::JsonParser<TReader, TWriter>::parseString() {
typename RemoveReference<TWriter>::type::String str = _writer.startString();
skipSpacesAndComments(_reader);
char c = _reader.current();
if (isQuote(c)) { // quotes
_reader.move();
char stopChar = c;
for (;;) {
c = _reader.current();
if (c == '\0') break;
_reader.move();
if (c == stopChar) break;
if (c == '\\') {
// replace char
c = Encoding::unescapeChar(_reader.current());
if (c == '\0') break;
_reader.move();
}
str.append(c);
}
} else { // no quotes
for (;;) {
if (!canBeInNonQuotedString(c)) break;
_reader.move();
str.append(c);
c = _reader.current();
}
}
return str.c_str();
}
template <typename TReader, typename TWriter>
inline bool ArduinoJson::Internals::JsonParser<TReader, TWriter>::parseStringTo(
JsonVariant *destination) {
bool hasQuotes = isQuote(_reader.current());
const char *value = parseString();
if (value == NULL) return false;
if (hasQuotes) {
*destination = value;
} else {
*destination = RawJson(value);
}
return true;
}
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