55 lines
1.0 KiB
C#
55 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;
|
|
|
|
namespace MonoFN.Cecil.Metadata {
|
|
|
|
sealed class BlobHeap : Heap {
|
|
|
|
public BlobHeap (byte [] data)
|
|
: base (data)
|
|
{
|
|
}
|
|
|
|
public byte [] Read (uint index)
|
|
{
|
|
if (index == 0 || index > this.data.Length - 1)
|
|
return Empty<byte>.Array;
|
|
|
|
int position = (int)index;
|
|
int length = (int)data.ReadCompressedUInt32 (ref position);
|
|
|
|
if (length > data.Length - position)
|
|
return Empty<byte>.Array;
|
|
|
|
var buffer = new byte [length];
|
|
|
|
Buffer.BlockCopy (data, position, buffer, 0, length);
|
|
|
|
return buffer;
|
|
}
|
|
|
|
public void GetView (uint signature, out byte [] buffer, out int index, out int length)
|
|
{
|
|
if (signature == 0 || signature > data.Length - 1) {
|
|
buffer = null;
|
|
index = length = 0;
|
|
return;
|
|
}
|
|
|
|
buffer = data;
|
|
|
|
index = (int)signature;
|
|
length = (int)buffer.ReadCompressedUInt32 (ref index);
|
|
}
|
|
}
|
|
}
|