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From: William Starner <billeug@worldnet.att.net>
Subject: Interfacing to void *
Date: 1999/07/18
Message-ID: <37929901.649C0955@worldnet.att.net>#1/1
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 1999 03:18:37 GMT)
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Newsgroups: comp.lang.ada
Date: 1999-07-19T03:18:37+00:00
List-Id: <comp.lang.ada>

If I'm trying to interface to a C library that uses this struct

struct BigNum {
	void *ptr;
	unsigned int size;
	unsigned int allocated;
};

how should I interface to void*?

I have
private
	type voidpointer is access character;
	type BigNum is record 
		ptr: voidpointer;
		size: Interfaces.C.unsigned;
		allocated: Interfaces.C.unsigned;
	end record;
	type RealBigNum is access BigNum;
	type UnboundedInt is new Linear with record
		Value: RealBigNum;
	end record;
end nla23.linear.bnlib;
but char* = void* is a C rule, not an Ada rule. It probably works, but it's not
right. (I don't need to access anything through that pointer.)