Programming

Earlier I had one structure C

Code:

typedef struct c
{
    int cc;
}CS;

I used to call a library function say int GetData(CS *x) which was returning me the above structure C with data.

Code:

GetData(CS *x)

Function call used to be like:

Code:

CS CSobj;
GetData(&CSObj);

Now there are two structures say C and D

Code:

typedef struct c
{
    int cc;
}CS;
CS CSobj;

typedef struct d
{
    int dc;
    int dd;
}DS;
DS DSobj;

Function GetData() has been modified to:

Code:

GetData(void* x)

I have to call the library function say int GetData(void* x) which will be returning me one of the above structures through that void* paramter. The return type of the function tells which structure is returned.

Problem is while calling the function GetData() how and what parameter to pass since I am unaware of which struct the function will return. Any way out of this problem?