44 lines
1.2 KiB
Go
44 lines
1.2 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package hash provides interfaces for hash functions.
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package hash
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import "io"
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// Hash is the common interface implemented by all hash functions.
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type Hash interface {
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// Write (via the embedded io.Writer interface) adds more data to the running hash.
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// It never returns an error.
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io.Writer
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// Sum appends the current hash to b and returns the resulting slice.
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// It does not change the underlying hash state.
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Sum(b []byte) []byte
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// Reset resets the Hash to its initial state.
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Reset()
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// Size returns the number of bytes Sum will return.
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Size() int
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// BlockSize returns the hash's underlying block size.
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// The Write method must be able to accept any amount
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// of data, but it may operate more efficiently if all writes
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// are a multiple of the block size.
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BlockSize() int
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}
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// Hash32 is the common interface implemented by all 32-bit hash functions.
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type Hash32 interface {
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Hash
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Sum32() uint32
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}
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// Hash64 is the common interface implemented by all 64-bit hash functions.
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type Hash64 interface {
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Hash
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Sum64() uint64
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}
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