(function(){
const _global = this;
const createBuffer = (val) => new TextEncoder().encode(val)
/**
* JS Implementation of MurmurHash2
*
* @author Gary Court
* @see http://github.com/garycourt/murmurhash-js
* @author Austin Appleby
* @see http://sites.google.com/site/murmurhash/
*
* @param {Uint8Array | string} str ASCII only
* @param {number} seed Positive integer only
* @return {number} 32-bit positive integer hash
*/
function MurmurHashV2(str, seed) {
if (typeof str === 'string') str = createBuffer(str);
let
l = str.length,
h = seed ^ l,
i = 0,
k;
while (l >= 4) {
k =
((str[i] & 0xff)) |
((str[++i] & 0xff) << 8) |
((str[++i] & 0xff) << 16) |
((str[++i] & 0xff) << 24);
k = (((k & 0xffff) * 0x5bd1e995) + ((((k >>> 16) * 0x5bd1e995) & 0xffff) << 16));
k ^= k >>> 24;
k = (((k & 0xffff) * 0x5bd1e995) + ((((k >>> 16) * 0x5bd1e995) & 0xffff) << 16));
h = (((h & 0xffff) * 0x5bd1e995) + ((((h >>> 16) * 0x5bd1e995) & 0xffff) << 16)) ^ k;
l -= 4;
++i;
}
switch (l) {
case 3: h ^= (str[i + 2] & 0xff) << 16;
case 2: h ^= (str[i + 1] & 0xff) << 8;
case 1: h ^= (str[i] & 0xff);
h = (((h & 0xffff) * 0x5bd1e995) + ((((h >>> 16) * 0x5bd1e995) & 0xffff) << 16));
}
h ^= h >>> 13;
h = (((h & 0xffff) * 0x5bd1e995) + ((((h >>> 16) * 0x5bd1e995) & 0xffff) << 16));
h ^= h >>> 15;
return h >>> 0;
};
/*
* JS Implementation of MurmurHash3 (r136) (as of May 20, 2011)
*
* @author Gary Court
* @see http://github.com/garycourt/murmurhash-js
* @author Austin Appleby
* @see http://sites.google.com/site/murmurhash/
*
* @param {Uint8Array | string} key ASCII only
* @param {number} seed Positive integer only
* @return {number} 32-bit positive integer hash
*/
function MurmurHashV3(key, seed) {
if (typeof key === 'string') key = createBuffer(key);
let remainder, bytes, h1, h1b, c1, c1b, c2, c2b, k1, i;
remainder = key.length & 3; // key.length % 4
bytes = key.length - remainder;
h1 = seed;
c1 = 0xcc9e2d51;
c2 = 0x1b873593;
i = 0;
while (i < bytes) {
k1 =
((key[i] & 0xff)) |
((key[++i] & 0xff) << 8) |
((key[++i] & 0xff) << 16) |
((key[++i] & 0xff) << 24);
++i;
k1 = ((((k1 & 0xffff) * c1) + ((((k1 >>> 16) * c1) & 0xffff) << 16))) & 0xffffffff;
k1 = (k1 << 15) | (k1 >>> 17);
k1 = ((((k1 & 0xffff) * c2) + ((((k1 >>> 16) * c2) & 0xffff) << 16))) & 0xffffffff;
h1 ^= k1;
h1 = (h1 << 13) | (h1 >>> 19);
h1b = ((((h1 & 0xffff) * 5) + ((((h1 >>> 16) * 5) & 0xffff) << 16))) & 0xffffffff;
h1 = (((h1b & 0xffff) + 0x6b64) + ((((h1b >>> 16) + 0xe654) & 0xffff) << 16));
}
k1 = 0;
switch (remainder) {
case 3: k1 ^= (key[i + 2] & 0xff) << 16;
case 2: k1 ^= (key[i + 1] & 0xff) << 8;
case 1: k1 ^= (key[i] & 0xff);
k1 = (((k1 & 0xffff) * c1) + ((((k1 >>> 16) * c1) & 0xffff) << 16)) & 0xffffffff;
k1 = (k1 << 15) | (k1 >>> 17);
k1 = (((k1 & 0xffff) * c2) + ((((k1 >>> 16) * c2) & 0xffff) << 16)) & 0xffffffff;
h1 ^= k1;
}
h1 ^= key.length;
h1 ^= h1 >>> 16;
h1 = (((h1 & 0xffff) * 0x85ebca6b) + ((((h1 >>> 16) * 0x85ebca6b) & 0xffff) << 16)) & 0xffffffff;
h1 ^= h1 >>> 13;
h1 = ((((h1 & 0xffff) * 0xc2b2ae35) + ((((h1 >>> 16) * 0xc2b2ae35) & 0xffff) << 16))) & 0xffffffff;
h1 ^= h1 >>> 16;
return h1 >>> 0;
}
const murmur = MurmurHashV3;
murmur.v2 = MurmurHashV2;
murmur.v3 = MurmurHashV3;
if (typeof(module) != 'undefined') {
module.exports = murmur;
} else {
const _previousRoot = _global.murmur;
murmur.noConflict = function() {
_global.murmur = _previousRoot;
return murmur;
}
_global.murmur = murmur;
}
}());