CPointerMember

CPointerMember[obj,mem]

is a symbolic representation of access from a pointer to a struct.

Details and Options

SymbolicC expressions are inert; they evaluate to themselves, staying in an unevaluated form.
SymbolicC expressions can be converted into a C string with ToCCodeString.

To use SymbolicC you first need to load the package:

Wolfram Language code: Needs["SymbolicC`"]

This extracts an element from a pointer to a struct:

Wolfram Language code: CPointerMember["obj", "length"]//ToCCodeString

Here a cast is used to move the object to the correct type:

Wolfram Language code: CMember[CCast[CPointerType["data"], "obj"], "length"]//ToCCodeString

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