volume.cpp

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#include "roo_quantity/volume.h"
 
namespace roo_quantity {
namespace {
 
void VolumeToString(const Volume& val, char* out, int maxlen) {
  if (val.isUnknown()) {
    strncpy(out, "? m³", maxlen);
  } else {
    const char* format;
    float num;
    if (val > VolumeInCubicKilometers(1.0f)) {
      format = "%g km³";
      num = val.inCubicKilometers();
    } else if (val > VolumeInCubicMeters(1.0f)) {
      format = "%g m³";
      num = val.inCubicMeters();
    } else if (val > VolumeInCubicDecimeters(1.0f)) {
      format = "%g dm³";
      num = val.inCubicDecimeters();
    } else if (val > VolumeInMilliliters(1.0f)) {
      format = "%g ml";
      num = val.inMilliliters();
    } else if (val > VolumeInCubicMillimeters(1.0f)) {
      format = "%g mm³";
      num = val.inCubicMillimeters();
    } else {
      format = "%g µm³";
      num = val.inCubicMicrometers();
    }
    snprintf(out, maxlen, format, num);
  }
}
 
}  // namespace
 
#if defined(ESP32) || defined(ESP8266) || defined(__linux__)
 
std::string Volume::asString() const {
  char out[16];
  VolumeToString(*this, out, 16);
  return out;
}
 
#endif
 
#if defined(ARDUINO)
 
String Volume::asArduinoString() const {
  char out[16];
  VolumeToString(*this, out, 16);
  return out;
}
 
#endif
 
roo_logging::Stream& operator<<(roo_logging::Stream& os, const Volume& val) {
  char out[16];
  VolumeToString(val, out, 16);
  os << out;
  return os;
}
 
}  // namespace roo_quantity