PEMemoryBlock.cs

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using System.Collections.Immutable;
using System.Reflection.Internal;
using System.Reflection.Metadata;
 
namespace System.Reflection.PortableExecutable;
 
public readonly struct PEMemoryBlock
{
    private readonly AbstractMemoryBlock _block;
 
    private readonly int _offset;
 
    public unsafe byte* Pointer
    {
        get
        {
            if (_block == null)
            {
                return null;
            }
            return _block.Pointer + _offset;
        }
    }
 
    public int Length => (_block?.Size - _offset).GetValueOrDefault();
 
    internal PEMemoryBlock(AbstractMemoryBlock block, int offset = 0)
    {
        _block = block;
        _offset = offset;
    }
 
    public unsafe BlobReader GetReader()
    {
        return new BlobReader(Pointer, Length);
    }
 
    public unsafe BlobReader GetReader(int start, int length)
    {
        BlobUtilities.ValidateRange(Length, start, length, "length");
        return new BlobReader(Pointer + start, length);
    }
 
    public ImmutableArray<byte> GetContent()
    {
        return _block?.GetContentUnchecked(_offset, Length) ?? ImmutableArray<byte>.Empty;
    }
 
    public ImmutableArray<byte> GetContent(int start, int length)
    {
        BlobUtilities.ValidateRange(Length, start, length, "length");
        return _block?.GetContentUnchecked(_offset + start, length) ?? ImmutableArray<byte>.Empty;
    }
}