Pileus Git - ~andy/sfvlug/blob - c/src/sm.c

   1 #include <stdio.h>
   2
   3 int (*state)(typeof(state));
   4
   5 int sm_first(state_t *state);
   6 int sm_second(state_t *state);
   7 int sm_third(state_t *state);
   8 int sm_done(state_t *state);
   9
  10 int sm_first(state_t *state)
  11 {
  12         printf("first\n");
  13         *state = &sm_second;
  14         return 1;
  15 }
  16
  17 int sm_second(state_t *state)
  18 {
  19         *state = &sm_third;
  20         printf("second\n");
  21         return 1;
  22 }
  23
  24 int sm_third(state_t *state)
  25 {
  26         *state = &sm_done;
  27         printf("third\n");
  28         return 1;
  29 }
  30
  31 int sm_done(state_t *state)
  32 {
  33         printf("done\n");
  34         return 0;
  35 }
  36
  37 int main()
  38 {
  39         state_t state = sm_first;
  40         while (state(&state));
  41         return 0;
  42 }