How to store goto labels in an array and then jump to them?

Question

I want to declare an array of \"jumplabels\".

Then I want to jump to a \"jumplabel\" in this array.

But I have not any idea how to do this.

It should

Answer 1

There's no direct way to store code addresses to jump to in C. How about using switch.

#define jump(x)  do{ label=x; goto jump_target; }while(0)
int label=START;
jump_target:
switch(label)
{
    case START:
        /* ... */
    case LABEL_A:
        /* ... */
}

You can find similar code produced by every stack-less parser / state machine generator. Such code is not easy to follow so unless it is generated code or your problem is most easily described by state machine I would recommend not do this.