| // 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 |
| } |