segmentToI16FileContents function

String segmentToI16FileContents(MemorySegment seg, String startCode, int lineLength)

Converts the segment seg to an Intel Hex file record block with a max size of 1 MB.

Uses startCode to start a record and writes lineLength bytes per line. lineLength must be between 1 and 255.

Implementation

String segmentToI16FileContents(
    MemorySegment seg, String startCode, int lineLength) {
  _validateLineLength(lineLength);
  const i16max = 65535;
  if (seg.endAddress > i16max * 16) {
    throw IHexRangeError(
        "Address range [${seg.address},${seg.endAddress}] can not be represented as I16HEX (max. Range: [0,1048560])");
  }
  var rv = StringBuffer();
  var lastBlockAddress = 0;
  for (int i = 0; i < seg.length; i = i + lineLength) {
    final dataStartAddress = seg.address + i;
    final blockStartAddress = dataStartAddress & 0xF0000;
    if (blockStartAddress != lastBlockAddress) {
      rv.write(createExtendedSegmentAddressRecord(blockStartAddress,
          startCode: startCode));
    }
    lastBlockAddress = blockStartAddress;
    rv.write(createDataRecord(dataStartAddress & 0xFFFF,
        seg.slice(i, min(i + lineLength, seg.length)),
        startCode: startCode));
  }
  return rv.toString();
}