export function str2binb(str: string, chrsz: number) {
const bin: number[] = [];
const mask = (1 << chrsz) - 1;
for (let i = 0; i < str.length * chrsz; i += chrsz) {
bin[i >> 5] |= (str.charCodeAt(i / chrsz) & mask) << (24 - (i % 32));
}
return bin;
}