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POReading a C/C++ data structure in C# from a byte array
 

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    <p>What would be the best way to fill a C# struct from a byte[] array where the data was from a C/C++ struct? The C struct would look something like this (my C is very rusty):</p> <pre><code>typedef OldStuff { CHAR Name[8]; UInt32 User; CHAR Location[8]; UInt32 TimeStamp; UInt32 Sequence; CHAR Tracking[16]; CHAR Filler[12]; } </code></pre> <p>And would fill something like this:</p> <pre><code>[StructLayout(LayoutKind.Explicit, Size = 56, Pack = 1)] public struct NewStuff { [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 8)] [FieldOffset(0)] public string Name; [MarshalAs(UnmanagedType.U4)] [FieldOffset(8)] public uint User; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 8)] [FieldOffset(12)] public string Location; [MarshalAs(UnmanagedType.U4)] [FieldOffset(20)] public uint TimeStamp; [MarshalAs(UnmanagedType.U4)] [FieldOffset(24)] public uint Sequence; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)] [FieldOffset(28)] public string Tracking; } </code></pre> <p>What is best way to copy <code>OldStuff</code> to <code>NewStuff</code>, if <code>OldStuff</code> was passed as byte[] array?</p> <p>I'm currently doing something like the following, but it feels kind of clunky.</p> <pre><code>GCHandle handle; NewStuff MyStuff; int BufferSize = Marshal.SizeOf(typeof(NewStuff)); byte[] buff = new byte[BufferSize]; Array.Copy(SomeByteArray, 0, buff, 0, BufferSize); handle = GCHandle.Alloc(buff, GCHandleType.Pinned); MyStuff = (NewStuff)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(NewStuff)); handle.Free(); </code></pre> <p>Is there better way to accomplish this?</p> <hr> <p>Would using the <code>BinaryReader</code> class offer any performance gains over pinning the memory and using <code>Marshal.PtrStructure</code>?</p>
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    1. COFYI, If your program runs on various machines you might need to handle little vs big endian.
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    2. COHow can you handle that on the level of the struct, i.e. without having to individually reverse the bytes for each value in the struct?
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