encodeWithEncoder static method

Uint8List encodeWithEncoder(ChunkEncoder encoder, Uint8List data)

Encodes the data buffer using the provided encoder.

If the data length exceeds LZFChunk.maxChunkLength, it is split into multiple chunks which are then coalesced into a single contiguous byte list.

Implementation

static Uint8List encodeWithEncoder(ChunkEncoder encoder, Uint8List data) {
  var remaining = data.length;
  var offset = 0;

  // Process the first chunk.
  var chunkLength = math.min(LZFChunk.maxChunkLength, remaining);
  final firstChunk = encoder.encode(
    data,
    offset: offset,
    length: chunkLength,
  );
  remaining -= chunkLength;
  offset += chunkLength;

  // If the entire data fits into one chunk, return it directly.
  if (remaining < 1) return firstChunk.bytes;

  // Otherwise, chain additional chunks.
  var totalBytes = firstChunk.length;
  var currentChunk = firstChunk;

  while (remaining > 0) {
    chunkLength = math.min(remaining, LZFChunk.maxChunkLength);
    final nextChunk = encoder.encode(
      data,
      offset: offset,
      length: chunkLength,
    );
    offset += chunkLength;
    remaining -= chunkLength;
    totalBytes += nextChunk.length;
    currentChunk.next = nextChunk;
    currentChunk = nextChunk;
  }

  // Coalesce all chunks into a single contiguous byte list.
  final result = Uint8List(totalBytes);
  offset = 0;
  LZFChunk? chunk = firstChunk;
  while (chunk != null) {
    offset = chunk.copyTo(result, offset: offset);
    chunk = chunk.next;
  }

  return result;
}