Function b

xiaohongshu/test.js:852–867

(e, t, n, r)

                return -1
            }
            function b(e, t, n, r) {
                n = Number(n) || 0;
                var i = e.length - n;
                r ? (r = Number(r)) > i && (r = i) : r = i;
                var o = t.length;
                if (o % 2 != 0)
                    throw new TypeError("Invalid hex string");
                r > o / 2 && (r = o / 2);
                for (var a = 0; a < r; ++a) {
                    var s = parseInt(t.substr(2 * a, 2), 16);
                    if (isNaN(s))
                        return a;
                    e[n + a] = s
                }
                return a
            }
            function w(e, t, n, r) {
                return z($(t, e.length - n), e, n, r)
            }