UserStringHeap.cs

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using System.Reflection.Internal;
 
namespace System.Reflection.Metadata.Ecma335;
 
internal readonly struct UserStringHeap
{
    internal readonly MemoryBlock Block;
 
    public UserStringHeap(MemoryBlock block)
    {
        Block = block;
    }
 
    internal string GetString(UserStringHandle handle)
    {
        if (!Block.PeekHeapValueOffsetAndSize(handle.GetHeapOffset(), out var offset, out var size))
        {
            return string.Empty;
        }
        return Block.PeekUtf16(offset, size & -2);
    }
 
    internal UserStringHandle GetNextHandle(UserStringHandle handle)
    {
        if (!Block.PeekHeapValueOffsetAndSize(handle.GetHeapOffset(), out var offset, out var size))
        {
            return default(UserStringHandle);
        }
        int num = offset + size;
        if (num >= Block.Length)
        {
            return default(UserStringHandle);
        }
        return UserStringHandle.FromOffset(num);
    }
}