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/* eslint-disable no-fallthrough */export class MurmurHash {  murmurHash3Int32 (key:string, seed = 0):number {    let h1, h1b, k1, i
    const remainder = key.length & 3 // key.length % 4    const bytes = key.length - remainder    h1 = seed    const c1 = 0xcc9e2d51    const c2 = 0x1b873593    i = 0
    while (i < bytes) {      k1 = (key.charCodeAt(i) & 0xff) | ((key.charCodeAt(++i) & 0xff) << 8) | ((key.charCodeAt(++i) & 0xff) << 16) | ((key.charCodeAt(++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.charCodeAt(i + 2) & 0xff) << 16      case 2: k1 ^= (key.charCodeAt(i + 1) & 0xff) << 8      case 1: k1 ^= (key.charCodeAt(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  }}