49 lines
1.0 KiB
C#
49 lines
1.0 KiB
C#
//
|
|
// Author:
|
|
// Jb Evain (jbevain@gmail.com)
|
|
//
|
|
// Copyright (c) 2008 - 2015 Jb Evain
|
|
// Copyright (c) 2008 - 2011 Novell, Inc.
|
|
//
|
|
// Licensed under the MIT/X11 license.
|
|
//
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
|
|
namespace Mono.Cecil.PE {
|
|
|
|
sealed class ByteBufferEqualityComparer : IEqualityComparer<ByteBuffer> {
|
|
|
|
public bool Equals (ByteBuffer x, ByteBuffer y)
|
|
{
|
|
if (x.length != y.length)
|
|
return false;
|
|
|
|
var x_buffer = x.buffer;
|
|
var y_buffer = y.buffer;
|
|
|
|
for (int i = 0; i < x.length; i++)
|
|
if (x_buffer [i] != y_buffer [i])
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
public int GetHashCode (ByteBuffer buffer)
|
|
{
|
|
// See http://en.wikipedia.org/wiki/Fowler%E2%80%93Noll%E2%80%93Vo_hash_function
|
|
const int fnv_offset_bias = unchecked((int)2166136261);
|
|
const int fnv_prime = 16777619;
|
|
|
|
var hash_code = fnv_offset_bias;
|
|
var bytes = buffer.buffer;
|
|
|
|
for (int i = 0; i < buffer.length; i++)
|
|
hash_code = unchecked ((hash_code ^ bytes [i]) * fnv_prime);
|
|
|
|
return hash_code;
|
|
}
|
|
}
|
|
}
|