readIntoSync method

Implementation

int readIntoSync(Uint8List buffer, int start, int? end) {
  final int usedEnd = math.min(end ?? (start + buffer.length), _length);
  int bufferStartWriteIndex = 0;
  int relativeStart;
  do {
    relativeStart = start + bufferStartWriteIndex;
    final int contentIndex = relativeStart ~/ _subListSize;
    if (contentIndex >= _content.length) {
      break;
    }
    final List<int> contentSubList = _content[contentIndex];
    final int subListStartIndex = relativeStart % _subListSize;
    final int dataLengthToCopy = math.min(
      usedEnd - relativeStart,
      _subListSize - subListStartIndex,
    );
    buffer.setRange(
      bufferStartWriteIndex,
      bufferStartWriteIndex + dataLengthToCopy,
      contentSubList.getRange(
        subListStartIndex,
        subListStartIndex + dataLengthToCopy,
      ),
    );
    bufferStartWriteIndex += dataLengthToCopy;
  } while (relativeStart < usedEnd);
  return usedEnd - start;
}