locutus
Version:
Locutus other languages' standard libraries to JavaScript for fun and educational purposes
23 lines (22 loc) • 797 B
JavaScript
export function hex2bin(s) {
// discuss at: https://locutus.io/php/hex2bin/
// parity verified: PHP 8.3
// original by: Dumitru Uzun (https://duzun.me)
// example 1: hex2bin('44696d61')
// returns 1: 'Dima'
// example 2: hex2bin('00')
// returns 2: '\x00'
// example 3: hex2bin('2f1q')
// returns 3: false
const ret = [];
const input = String(s);
for (let i = 0; i < input.length; i += 2) {
const c = Number.parseInt(input.substring(i, i + 1), 16);
const k = Number.parseInt(input.substring(i + 1, i + 2), 16);
if (Number.isNaN(c) || Number.isNaN(k)) {
return false;
}
ret.push((c << 4) | k);
}
return String.fromCharCode.apply(String, ret);
}