Method getInt32

src/utils.ts:818–837

* If BufferPool contains 4 bytes or more construct an int32 from the leading bytes, * otherwise return null. Size can be negative, caller should error check.

()

   * otherwise return null. Size can be negative, caller should error check.
   */
  getInt32(): number | null {
    if (this.totalByteLength < 4) {
      return null;
    }
    const firstBuffer = this.buffers.first();
    if (firstBuffer != null && firstBuffer.byteLength >= 4) {
      return NumberUtils.getInt32LE(firstBuffer, 0);
    }

    // Unlikely case: an int32 is split across buffers.
    // Use read and put the returned buffer back on top
    const top4Bytes = this.read(4);
    const value = NumberUtils.getInt32LE(top4Bytes, 0);

    // Put it back.
    this.totalByteLength += 4;
    this.buffers.unshift(top4Bytes);

    return value;
  }

  /** Reads the requested number of bytes, optionally consuming them */
  read(size: number): Uint8Array {