Question

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how to use array of function pointers?

I am wondering how one can declare in C a dynamic list of function pointers ? Using a pointer to function pointer ?

Answer 1

A pointer to a function pointer, with which you can use to point to a block of dynamically allocated memory. Let’s say the function type is void (int):

void (*(*))(int) // Bare type
void (*(*f))(int) // Variable

Or you may want an array to function pointers, in which case:

void (*[10])(int) // Bare type
void (*af[10])(int) // Variable

You can change the parameter and the return type of the functions.

An array of function pointers can be used as a map from number to function to be executed. It is one way to do emulation – for example, after you have obtained the OP code from the instruction, you can execute the operation by using the array of pointer. (This is one way to do so, but I’m not sure whether it is actually done in emulation code).