Add offset to IntPtr

c# .net pinvoke interop
Marcin Rybacki picture Marcin Rybacki · Dec 8, 2009 · Viewed 25.5k times · Source

I'm looking for a way to perform pointer operations in C# or .NET in particular.

I want to do something very simple

Having a pointer IntPtr I want to get IntPtr object which points to 2 bytes ahead.

I read some post that the foolowing snippet will work...

IntPtr ptr = new IntPtr(oldptr.ToInt32() + 2);

But I have doubts whether this statement is also valid for 64-bit machine (since addressing is in 64-bits there)..

I found this elegant method to add offset, but unfortunately is in .NET 4.0 only http://msdn.microsoft.com/en-us/library/system.intptr.add%28VS.100%29.aspx

Answer

BLeB picture BLeB · Mar 2, 2011

In .net 4 static Add() and Subtract() methods have been added.

IntPtr ptr = IntPtr.Add(oldPtr, 2);

http://msdn.microsoft.com/en-us/library/system.intptr.add.aspx

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