65 lines
1.4 KiB
Go
65 lines
1.4 KiB
Go
// Downloaded from 'https://github.com/dgryski/go-stadtx/raw/3c3d9b328c24a9b5ecd370654cd6e9d60a85752d/stadtx.go'. DO NOT EDIT.
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// Package stadtx implements Stadtx Hash
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/*
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https://github.com/demerphq/BeagleHash
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*/
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package stadtx
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func rotl64(x uint64, r uint64) uint64 {
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return (((x) << (r)) | ((x) >> (64 - r)))
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}
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func rotr64(x uint64, r uint64) uint64 {
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return (((x) >> (r)) | ((x) << (64 - r)))
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}
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func scramble64(v, prime uint64) uint64 {
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v ^= (v >> 13)
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v ^= (v << 35)
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v ^= (v >> 30)
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v *= prime
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v ^= (v >> 19)
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v ^= (v << 15)
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v ^= (v >> 46)
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return v
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}
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func SeedState(seed []uint64) State {
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var state State
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state[0] = seed[0] ^ 0x43f6a8885a308d31
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state[1] = seed[1] ^ 0x3198a2e03707344a
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state[2] = seed[0] ^ 0x4093822299f31d00
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state[3] = seed[1] ^ 0x82efa98ec4e6c894
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if state[0] == 0 {
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state[0] = 1
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}
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if state[1] == 0 {
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state[1] = 2
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}
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if state[2] == 0 {
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state[2] = 4
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}
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if state[3] == 0 {
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state[3] = 8
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}
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state[0] = scramble64(state[0], 0x801178846e899d17)
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state[0] = scramble64(state[0], 0xdd51e5d1c9a5a151)
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state[1] = scramble64(state[1], 0x93a7d6c8c62e4835)
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state[1] = scramble64(state[1], 0x803340f36895c2b5)
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state[2] = scramble64(state[2], 0xbea9344eb7565eeb)
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state[2] = scramble64(state[2], 0xcd95d1e509b995cd)
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state[3] = scramble64(state[3], 0x9999791977e30c13)
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state[3] = scramble64(state[3], 0xaab8b6b05abfc6cd)
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return state
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}
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type State [4]uint64
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