Function readExtraFieldUnix

index.cjs:4135–4167

(extraField, directory, isInfoZip)

}

function readExtraFieldUnix(extraField, directory, isInfoZip) {
	try {
		const view = getDataView$1(new Uint8Array(extraField.data));
		let offset = 0;
		const version = getUint8(view, offset++);
		const uidSize = getUint8(view, offset++);
		const uidBytes = extraField.data.subarray(offset, offset + uidSize);
		offset += uidSize;
		const uid = unpackUnixId(uidBytes);
		const gidSize = getUint8(view, offset++);
		const gidBytes = extraField.data.subarray(offset, offset + gidSize);
		offset += gidSize;
		const gid = unpackUnixId(gidBytes);
		let unixMode = UNDEFINED_VALUE;
		if (!isInfoZip && offset + 2 <= extraField.data.length) {
			const base = extraField.data;
			const modeView = new DataView(base.buffer, base.byteOffset + offset, 2);
			unixMode = modeView.getUint16(0, true);
		}
		Object.assign(extraField, { version, uid, gid, unixMode });
		if (uid !== UNDEFINED_VALUE) {
			directory.uid = uid;
		}
		if (gid !== UNDEFINED_VALUE) {
			directory.gid = gid;
		}
		if (unixMode !== UNDEFINED_VALUE) {
			directory.unixMode = unixMode;
		}
	} catch {
		// ignored
	}
}

function unpackUnixId(bytes) {
	const buffer = new Uint8Array(4);