47 lines
1.2 KiB
C#
47 lines
1.2 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.Collections.Generic;
|
|
|
|
namespace MonoFN.Cecil.PE
|
|
{
|
|
internal sealed class ByteBufferEqualityComparer : IEqualityComparer<ByteBuffer>
|
|
{
|
|
public bool Equals(ByteBuffer x, ByteBuffer y)
|
|
{
|
|
if (x.length != y.length)
|
|
return false;
|
|
|
|
byte[] x_buffer = x.buffer;
|
|
byte[] 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;
|
|
|
|
int hash_code = fnv_offset_bias;
|
|
byte[] bytes = buffer.buffer;
|
|
|
|
for (int i = 0; i < buffer.length; i++)
|
|
hash_code = unchecked((hash_code ^ bytes[i]) * fnv_prime);
|
|
|
|
return hash_code;
|
|
}
|
|
}
|
|
} |