// 十六进制转二进制
module.exports = (hex) => {
    let hexChars = '0123456789ABCDEF';
    let binaryString = '';
    for (let i = 0; i < hex.length; i++) {
        let hexIndex = hexChars.indexOf(hex[i].toUpperCase());
        let binaryDigit = hexIndex.toString(2);
        // 确保每个十六进制数字转换为四位二进制数字
        while (binaryDigit.length < 4) {
            binaryDigit = '0' + binaryDigit;
        }
        binaryString += binaryDigit;
    }
    return binaryString;
};