ILSpy/cecil/Mono.Cecil.Metadata/BlobHeap.cs

//
// BlobHeap.cs
//
// Author:
//   Jb Evain (jbevain@gmail.com)
//
// Copyright (c) 2008 - 2011 Jb Evain
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System;

using Mono.Cecil.PE;

namespace Mono.Cecil.Metadata {

	sealed class BlobHeap : Heap {

		public BlobHeap (Section section, uint start, uint size)
			: base (section, start, size)
		{
		}

		public byte [] Read (uint index)
		{
			if (index == 0 || index > Size - 1)
				return Empty<byte>.Array;

			var data = Section.Data;

			int position = (int) (index + Offset);
			int length = (int) data.ReadCompressedUInt32 (ref position);

			var buffer = new byte [length];

			Buffer.BlockCopy (data, position, buffer, 0, length);

			return buffer;
		}
	}
}