function _getMessage()

in packages/fb-tiger-hash/src/Tiger.js [35:66]

• 28 lines of code
• 5 McCabe index (conditional complexity)

function _getMessage(buffer /*: Buffer*/) /*: Array<BigInt>*/ {
  const words = [];
  let word = 0n;
  let byteLen = 0n;
  for (const c of buffer) {
    const b = byteLen++ & 0x7n;
    word |= BigInt(c) << (b << 3n);
    if (byteLen % 8n == 0n) {
      words.push(word);
      word = 0n;
    }
  }
  // Store original size (in bits)
  const bitSize = (byteLen << 3n) & U64;

  // Pad our message with a byte of 0x1 ala MD4 (Tiger1) padding
  const b = byteLen & 0x7n;
  if (b) {
    word |= 0x1n << (b << 3n);
    words.push(word);
    byteLen += 8n - b;
  } else {
    words.push(0x1n);
    byteLen += 8n;
  }

  for (byteLen %= 64n; byteLen < 56n; byteLen += 8n) {
    words.push(0n);
  }
  words.push(bitSize);
  return words;
}