Question

I have a struct like this:

static struct F_t {
  char *_1;
  char *_2;
  char *_3;
  char *_4;
  char *_5;
  char *_6;
  char *_7;
  char *_8;
  char *_9;
  char *_10;
  char *_11;
  char *_12;
} F = { 0 };

According to some values from stdin, it’s set properly.

The “problem” is that I retrieve it from string, and I need set it properly. I’m using this function currently:

static inline void 
setf(int i, char *value)
{
  /* Nothing to do. */
  if(i > 12)
    return;

  if(i == 1)
    F._1 = value;
  else if(i == 2)
    F._2 = value;
  else if(i == 3)
    F._3 = value;
  else if(i == 4)
    F._4 = value;
  else if(i == 5)
    F._5 = value;
  else if(i == 6)
    F._6 = value;
  else if(i == 7)
    F._7 = value;
  else if(i == 8)
    F._8 = value;
  else if(i == 9)
    F._9 = value;
  else if(i == 10)
    F._10 = value;
  else if(i == 11)
    F._11 = value;
  else if(i == 12)
    F._12 = value;
}

I’ve tried by using macros.. but as it’s set in run-time, it will not possible. I know that if have no reflections, modern things like this, etc. But maybe there is something that I do not know. Probably it’s possible in C++. But no. I want pure C.

Any suggestion is very appareciated. Thanks in advance.

Answer 1

Why don’t you just do this:

static struct F_t {
    char ** _;
} F = { 0 };

At this point, just make sure you malloc for the double array of size 12 (in your case) and then you can have a function as follows:

setf(int i, char *value)
{
     F._[i] = value;
}

Things look a lot better no?