A lightning fast, header only, stream oriented CBOR encoder/decoder with no memory usage.
Inherit cbor_encoder class from cbor_encoder.h, and override put_byte method for write one byte anywhere you like:
virtual void put_byte(uint8_t b);
Then use cbor_encoder methods (write_bool(), write_int(), write_array() etc.) to encode data. To write a byte array or a string to stream, first call write_bytes_header() or write_string_header()) and then write the data to output stream directly.
A helper class cbor_encoder_ostream from cbor_encoder_ostream.h extends cbor_encoder to work with standart std::ostream.
Inherit cbor_decoder from cbor_decoder.h, and override get_byte to read one byte from input source:
virtual uint8_t get_byte();
Then use cbor_decoder::read() to read next records (cbor_object) from the input (it will raise an exception on bad records). The cbor_object has type check methods (is_bool(), is_string() etc.) and get value methods (as_bool(), as_int()). Methods for get values will raise an exception when real type of records is different.
A helper class cbor_decoder_istream from cbor_decoder_istream.h extends cbor_decoder to work with standart std::istream.
{
std::ofstream f("test.bin", std::fstream::binary);
f.exceptions(std::fstream::failbit | std::fstream::badbit);
cbor_encoder_ostream encoder(f);
encoder.write_array(2);
encoder.write_string("Hello, World!");
encoder.write_int(42);
}
{
std::ifstream f("test.bin", std::fstream::binary);
f.exceptions(std::fstream::failbit | std::fstream::badbit);
cbor_decoder_istream decoder(f);
std::cout << "array size: " << decoder.read().as_array() << std::endl;
std::cout << decoder.read_string() << std::endl;
std::cout << decoder.read().as_int() << std::endl;
}