@foxglove/ros1/src/concatData.ts

Standalone TypeScript implementation of the ROS 1 (Robot Operating System) protocol with a pluggable transport layer

export function concatData(chunks: Uint8Array[]): Uint8Array {
  if (chunks.length === 1 && chunks[0] != null) {
    return chunks[0];
  }

  const totalLength = chunks.reduce((len, chunk) => len + chunk.length, 0);
  let result: Uint8Array | undefined;
  try {
    result = new Uint8Array(totalLength);
  } catch (err) {
    throw new Error(
      `failed to allocate ${totalLength} bytes to concatenate ${chunks.length} chunks`,
    );
  }

  let idx = 0;
  for (const chunk of chunks) {
    result.set(chunk, idx);
    idx += chunk.length;
  }
  return result;
}