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 ?

Did you know?Explore Trending and Topic pages for more stories like this.
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,
No comments posted yet

Your Answer:

Login to answer
324 Like 33 Dislike
Previous forums Next forums
Other forums

check comment for html
hi, I just wanted to check if a comment a user posts contains HTML, and if it does, to not allow it

Material Issuing for receiving batch
Dear All experts in MM/ PP,

Material issuing from main stores to factory is currently usi

Output Buffering question
Hi all,

I've been trying to wrap my head around output buffering. So far I've found tons of

Parse error: syntax error, unexpected T_ELSEIF in /home/......html/item.php on l
I do not know what is wrong with this. Hope some one can help. I do nto want to post the entire site

Date Question
I'm using the TIMESTAMP() function within mysql to set the date/time for certain events. However, ho

Preloading images
Posting this question here because I am not sure where this should belong.I am building an asp.net a

Array to string conversion
Can anyone help me with this?

Notice: Array to string conversion in /home/..../index.php on l

Undefined variable when using $_SERVER['PHP_SELF']
Hi guyz, please suggest me something...
On first.php I have one input field NAME, and on posting

Delete all files in folder except with certain name
I have a script that I want to delete all files in a folder (taken from a database) except for one n

Displaying data from MySql a different way
Hi all,
I'm pretty new to php and MySql and have hit a problem.

I am able to display data

Sign up to write
Sign up now if you have flare of writing..
Login   |   Register
Follow Us
Indyaspeak @ Facebook Indyaspeak @ Twitter Indyaspeak @ Pinterest RSS



Play Free Quiz and Win Cash