Function m

xiaohongshu/test.js:816–851

(e, t, n, r, i)

                throw new TypeError("val must be string, number or Buffer")
            }
            function m(e, t, n, r, i) {
                var o, a = 1, s = e.length, u = t.length;
                if (void 0 !== r && ("ucs2" === (r = String(r).toLowerCase()) || "ucs-2" === r || "utf16le" === r || "utf-16le" === r)) {
                    if (e.length < 2 || t.length < 2)
                        return -1;
                    a = 2,
                    s /= 2,
                    u /= 2,
                    n /= 2
                }
                function c(e, t) {
                    return 1 === a ? e[t] : e.readUInt16BE(t * a)
                }
                if (i) {
                    var l = -1;
                    for (o = n; o < s; o++)
                        if (c(e, o) === c(t, -1 === l ? 0 : o - l)) {
                            if (-1 === l && (l = o),
                            o - l + 1 === u)
                                return l * a
                        } else
                            -1 !== l && (o -= o - l),
                            l = -1
                } else
                    for (n + u > s && (n = s - u),
                    o = n; o >= 0; o--) {
                        for (var f = !0, d = 0; d < u; d++)
                            if (c(e, o + d) !== c(t, d)) {
                                f = !1;
                                break
                            }
                        if (f)
                            return o
                    }
                return -1
            }
            function b(e, t, n, r) {
                n = Number(n) || 0;
                var i = e.length - n;