@splitsoftware/splitio-commons/cjs/utils/murmur3/legacy.js

Split JavaScript SDK common components

"use strict";
// Deprecated hashing function, used for split bucketing. Replaced by murmur3
Object.defineProperty(exports, "__esModule", { value: true });
exports.bucket = exports.hash = void 0;
//
// JAVA reference implementation for the hashing function.
//
// int h = 0;
// for (int i = 0; i < key.length(); i++) {
//     h = 31 * h + key.charAt(i);
// }
// return h ^ seed; // XOR the hash and seed
//
function ToInteger(x) {
    x = Number(x);
    return x < 0 ? Math.ceil(x) : Math.floor(x);
}
function modulo(a, b) {
    return a - Math.floor(a / b) * b;
}
function ToUint32(x) {
    return modulo(ToInteger(x), Math.pow(2, 32));
}
function ToInt32(x) {
    var uint32 = ToUint32(x);
    if (uint32 >= Math.pow(2, 31)) {
        return uint32 - Math.pow(2, 32);
    }
    else {
        return uint32;
    }
}
function hash(str, seed) {
    var h = 0;
    for (var i = 0; i < str.length; i++) {
        h = ToInt32(ToInt32(31 * h) + str.charCodeAt(i));
    }
    return ToInt32(h ^ seed);
}
exports.hash = hash;
function bucket(str, seed) {
    return Math.abs(hash(str, seed) % 100) + 1;
}
exports.bucket = bucket;