Method write

Code/Arduino_libraries/SSD1306/OLEDDisplay.cpp:879–930

}

size_t OLEDDisplay::write(uint8_t c) {
  if (this->logBufferSize > 0) {
    // Don't waste space on \r\n line endings, dropping \r
    if (c == 13) return 1;

    // convert UTF-8 character to font table index
    c = (this->fontTableLookupFunction)(c);
    // drop unknown character
    if (c == 0) return 1;

    bool maxLineNotReached = this->logBufferLine < this->logBufferMaxLines;
    bool bufferNotFull = this->logBufferFilled < this->logBufferSize;

    // Can we write to the buffer?
    if (bufferNotFull && maxLineNotReached) {
      this->logBuffer[logBufferFilled] = c;
      this->logBufferFilled++;
      // Keep track of lines written
      if (c == 10) this->logBufferLine++;
    } else {
      // Max line number is reached
      if (!maxLineNotReached) this->logBufferLine--;

      // Find the end of the first line
      uint16_t firstLineEnd = 0;
      for (uint16_t i=0;i<this->logBufferFilled;i++) {
        if (this->logBuffer[i] == 10){
          // Include last char too
          firstLineEnd = i + 1;
          break;
        }
      }
      // If there was a line ending
      if (firstLineEnd > 0) {
        // Calculate the new logBufferFilled value
        this->logBufferFilled = logBufferFilled - firstLineEnd;
        // Now we move the lines infront of the buffer
        memcpy(this->logBuffer, &this->logBuffer[firstLineEnd], logBufferFilled);
      } else {
        // Let's reuse the buffer if it was full
        if (!bufferNotFull) {
          this->logBufferFilled = 0;
        }// else {
        //  Nothing to do here
        //}
      }
      write(c);
    }
  }
  // We are always writing all uint8_t to the buffer
  return 1;
}

size_t OLEDDisplay::write(const char* str) {
  if (str == NULL) return 0;