Function extractICO

src/core/lib/FileSignatures.mjs:3109–3126

(bytes, offset)

 * @param {number} offset
 */
export function extractICO(bytes, offset) {
    const stream = new Stream(bytes.slice(offset));

    // Move to number of files there are.
    stream.moveTo(4);

    // Read the number of files stored in the ICO
    const numberFiles = stream.readInt(2, "le");

    // Move forward to the last file header.
    stream.moveForwardsBy(8 + ((numberFiles-1) * 16));
    const fileSize = stream.readInt(4, "le");
    const fileOffset = stream.readInt(4, "le");

    // Move to the end of the last file.
    stream.moveTo(fileOffset + fileSize);
    return stream.carve();
}


/**