void* and sizeof()

Posted on 16th Feb 2014 07:03 pm by admin

Hi,

Using void* and sizeof is it possible to get the value of the object ?

I understand that dereferencing a void pointer is not directly possible. Is there a way (like casting) or something else to get the value of the object.

The problem is I wouldn't know the type of the object to cast to, I would only know the size of the object and a void pointer to the object.

something similar to what qsort does in stdlib.h, using merely the void pointer and sizeof, I think it manages to access the object, otherwise wouldn't be able to sort it.

Below shown is an example in which inside the function f1, I am suppose to access the object.

Code: class ClassA{};//Inside f1, I have to access the value of the object that pPtr1 points tovoid f1(void* pPtr1, const int pSizeOfObj){}int main(){ ClassA objA; f1(&objA, sizeof(objA)); return(0);}Thanks,

Your Answer:

Login to answer

Other forums

Php - mysql store data and use it later?
Hi, i' making a login page at the moment, however my username + password is stored many different pl

Oracle Connectivity
Hi Every One,

Can we access SAP from oracle database.If it possible then please spec

SCO Unix
I know this might not be the place to ask, but, can anyone tell me if SCO Unix comes with PHP built

Linux socket programming
Where can I find a good introduction to socket programming?

phph within href not showing php if change ? to &
Code: [Select]<a href="<?php echo $puser; ?>?m=<?php=(($m-1)&l

ALV List Display to point to another report on Double Click
Hi,

I want my ALV List Display to point to another report on Double Click on its line ite

Need help with some php code :)
Hey! I'm quite new to this whole thing, so please don't fire me with shait on this one =D

I'm

Are sessions secure at all?..
I haven't really gotten into yet, but I was just thinking of something weird..

Lets say you h

Creating a db with a query
Hello everyone.
I'm having troubles creating a db with a query.
I'm reading a book called PHP

how to load php class from another domain?
how to load php class from another domain?