41 lines
1.0 KiB
Go
41 lines
1.0 KiB
Go
/*
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Package rollinghash implements rolling versions of some hashes
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*/
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package rollinghash
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import "hash"
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type Roller interface {
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// Roll updates the hash of a rolling window from the entering byte.
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// A copy of the window is internally kept from the last Write().
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// This copy is updated along with the internal state of the checksum
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// in order to determine the new hash very quickly.
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Roll(b byte)
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}
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// rollinghash.Hash extends hash.Hash by adding the method Roll. A
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// rollinghash.Hash can be updated byte by byte, by specifying which byte
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// enters the window.
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type Hash interface {
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hash.Hash
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Roller
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}
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// rollinghash.Hash32 extends hash.Hash by adding the method Roll. A
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// rollinghash.Hash32 can be updated byte by byte, by specifying which
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// byte enters the window.
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type Hash32 interface {
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hash.Hash32
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Roller
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}
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// rollinghash.Hash64 extends hash.Hash by adding the method Roll. A
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// rollinghash.Hash64 can be updated byte by byte, by specifying which
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// byte enters the window.
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type Hash64 interface {
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hash.Hash64
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Roller
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}
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