2
// ByteBufferEqualityComparer.cs
5
// Jb Evain (jbevain@gmail.com)
7
// Copyright (c) 2008 - 2011 Jb Evain
9
// Permission is hereby granted, free of charge, to any person obtaining
10
// a copy of this software and associated documentation files (the
11
// "Software"), to deal in the Software without restriction, including
12
// without limitation the rights to use, copy, modify, merge, publish,
13
// distribute, sublicense, and/or sell copies of the Software, and to
14
// permit persons to whom the Software is furnished to do so, subject to
15
// the following conditions:
17
// The above copyright notice and this permission notice shall be
18
// included in all copies or substantial portions of the Software.
20
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30
using System.Collections.Generic;
32
namespace Mono.Cecil.PE {
34
sealed class ByteBufferEqualityComparer : IEqualityComparer<ByteBuffer> {
36
public bool Equals (ByteBuffer x, ByteBuffer y)
38
if (x.length != y.length)
41
var x_buffer = x.buffer;
42
var y_buffer = y.buffer;
44
for (int i = 0; i < x.length; i++)
45
if (x_buffer [i] != y_buffer [i])
51
public int GetHashCode (ByteBuffer buffer)
53
#if !BYTE_BUFFER_WELL_DISTRIBUTED_HASH
55
var bytes = buffer.buffer;
56
for (int i = 0; i < buffer.length; i++)
57
hash = (hash * 37) ^ bytes [i];
61
const uint p = 16777619;
62
uint hash = 2166136261;
64
var bytes = buffer.buffer;
65
for (int i = 0; i < buffer.length; i++)
66
hash = (hash ^ bytes [i]) * p;