forked from bblanchon/ArduinoJson
86 lines
2.0 KiB
C++
86 lines
2.0 KiB
C++
// Copyright Benoit Blanchon 2014-2016
|
|
// MIT License
|
|
//
|
|
// Arduino JSON library
|
|
// https://github.com/bblanchon/ArduinoJson
|
|
// If you like this project, please add a star!
|
|
|
|
#pragma once
|
|
|
|
#include "../Arduino/Print.hpp"
|
|
#include "Encoding.hpp"
|
|
#include "ForceInline.hpp"
|
|
#include "JsonFloat.hpp"
|
|
#include "JsonInteger.hpp"
|
|
|
|
namespace ArduinoJson {
|
|
namespace Internals {
|
|
|
|
// Writes the JSON tokens to a Print implementation
|
|
// This class is used by:
|
|
// - JsonArray::writeTo()
|
|
// - JsonObject::writeTo()
|
|
// - JsonVariant::writeTo()
|
|
// Its derived by PrettyJsonWriter that overrides some members to add
|
|
// indentation.
|
|
class JsonWriter {
|
|
public:
|
|
explicit JsonWriter(Print &sink) : _sink(sink), _length(0) {}
|
|
|
|
// Returns the number of bytes sent to the Print implementation.
|
|
// This is very handy for implementations of printTo() that must return the
|
|
// number of bytes written.
|
|
size_t bytesWritten() const { return _length; }
|
|
|
|
void beginArray() { write('['); }
|
|
void endArray() { write(']'); }
|
|
|
|
void beginObject() { write('{'); }
|
|
void endObject() { write('}'); }
|
|
|
|
void writeColon() { write(':'); }
|
|
void writeComma() { write(','); }
|
|
|
|
void writeBoolean(bool value) { write(value ? "true" : "false"); }
|
|
|
|
void writeString(const char *value) {
|
|
if (!value) {
|
|
write("null");
|
|
} else {
|
|
write('\"');
|
|
while (*value) writeChar(*value++);
|
|
write('\"');
|
|
}
|
|
}
|
|
|
|
void writeChar(char c) {
|
|
char specialChar = Encoding::escapeChar(c);
|
|
if (specialChar) {
|
|
write('\\');
|
|
write(specialChar);
|
|
} else {
|
|
write(c);
|
|
}
|
|
}
|
|
|
|
void writeInteger(JsonInteger value) { _length += _sink.print(value); }
|
|
|
|
void writeFloat(JsonFloat value, uint8_t decimals) {
|
|
_length += _sink.print(value, decimals);
|
|
}
|
|
|
|
void writeRaw(const char *s) { return write(s); }
|
|
|
|
protected:
|
|
void write(char c) { _length += _sink.write(c); }
|
|
FORCE_INLINE void write(const char *s) { _length += _sink.print(s); }
|
|
|
|
Print &_sink;
|
|
size_t _length;
|
|
|
|
private:
|
|
JsonWriter &operator=(const JsonWriter &); // cannot be assigned
|
|
};
|
|
}
|
|
}
|