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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package hash
import "io"
// Hash is the common interface implemented by all hash functions.
type Hash interface {
// Write adds more data to the running hash.
// It never returns an error.
io.Writer
// Sum returns the current hash, without changing the
// underlying hash state.
Sum() []byte
// Reset resets the hash to one with zero bytes written.
Reset()
// Size returns the number of bytes Sum will return.
Size() int
}
// Hash32 is the common interface implemented by all 32-bit hash functions.
type Hash32 interface {
Hash
Sum32() uint32
}
// Hash64 is the common interface implemented by all 64-bit hash functions.
type Hash64 interface {
Hash
Sum64() uint64
}
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