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// ArduinoJson - https://arduinojson.org
// Copyright Benoit Blanchon 2014-2021
// MIT License
#pragma once
#include "lib/ArduinoJson/Polyfills/assert.hpp"
namespace ARDUINOJSON_NAMESPACE {
template <typename TReader>
class Latch {
public:
Latch(TReader reader) : _reader(reader), _loaded(false) {
#if ARDUINOJSON_DEBUG
_ended = false;
#endif
}
void clear() {
_loaded = false;
}
int last() const {
return _current;
}
FORCE_INLINE char current() {
if (!_loaded) {
load();
}
return _current;
}
private:
void load() {
ARDUINOJSON_ASSERT(!_ended);
int c = _reader.read();
#if ARDUINOJSON_DEBUG
if (c <= 0)
_ended = true;
#endif
_current = static_cast<char>(c > 0 ? c : 0);
_loaded = true;
}
TReader _reader;
char _current;
bool _loaded;
#if ARDUINOJSON_DEBUG
bool _ended;
#endif
};
} // namespace ARDUINOJSON_NAMESPACE
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