Function dataBlock

packages/core/src/utils/umd-parser.test.ts:60–65

(dataID: number, content: Uint8Array)

}

function dataBlock(dataID: number, content: Uint8Array): Uint8Array {
  // Layout: '$' dataID[4 LE] dataLen[4 LE] content
  // dataLen covers full 9-byte header + content
  const dataLen = 9 + content.length;
  return concat(new Uint8Array([0x24]), u32le(dataID), u32le(dataLen), content);
}

function buildFixture(): { bytes: Uint8Array; expectedContent: string; coverBytes: Uint8Array } {
  // Two chapters' content concatenated