stream_output_stream.cpp

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#include "roo_io/stream/arduino/stream_output_stream.h"
 
#if (defined ARDUINO)
 
namespace roo_io {
 
ArduinoStreamOutputStream::ArduinoStreamOutputStream(Stream& output)
    : output_(output), status_(kOk) {}
 
size_t ArduinoStreamOutputStream::tryWrite(const byte* buf, size_t count) {
  if (status() != kOk) return 0;
  size_t available = output_.availableForWrite();
  if (count > available) count = available;
  if (count == 0) return 0;
  return output_.write((const uint8_t*)buf, count);
}
 
size_t ArduinoStreamOutputStream::write(const byte* buf, size_t count) {
  if (status() != kOk) return 0;
  size_t available = output_.availableForWrite();
  if (count > available) count = available;
  if (count == 0) ++count;
  return output_.write((const uint8_t*)buf, count);
}
 
size_t ArduinoStreamOutputStream::writeFully(const byte* buf, size_t count) {
  if (status() != kOk) return 0;
  return output_.write((const uint8_t*)buf, count);
}
 
void ArduinoStreamOutputStream::flush() {
  // Arduino 'flush' is stronger than our semantics, in that it waits for the
  // data to be actually sent out, which we don't require. if (status() != kOk)
  // return; output_.flush();
}
 
void ArduinoStreamOutputStream::close() {
  flush();
  status_ = kClosed;
}
 
}  // namespace roo_io
 
#endif  // (defined ARDUINO)