core/hooks.c

   1 /* hooks.c */
   2
   3 #include "hooks.h"
   4 #include <assert.h>
   5 #include "../lib/array.h"
   6
   7 array hooks[HOOKMAX];
   8
   9 void inithooks() {
  10   int i;
  11
  12   for (i=0;i<HOOKMAX;i++) {
  13     array_init(&(hooks[i]),sizeof(HookCallback));
  14     array_setlim1(&(hooks[i]),2);
  15     array_setlim2(&(hooks[i]),2);
  16   }
  17 }
  18
  19 int registerhook(int hooknum, HookCallback callback) {
  20   int i;
  21   HookCallback *hcbs;
  22
  23   if (hooknum>HOOKMAX)
  24     return 1;
  25
  26   hcbs=(HookCallback *)(hooks[hooknum].content);
  27   for(i=0;i<hooks[hooknum].cursi;i++)
  28     if(hcbs[i]==callback)
  29       return 1;
  30
  31   i=array_getfreeslot(&hooks[hooknum]);
  32   hcbs=(HookCallback *)(hooks[hooknum].content);
  33   hcbs[i]=callback;
  34
  35   return 0;
  36 }
  37
  38 int deregisterhook(int hooknum, HookCallback callback) {
  39   int i;
  40   HookCallback *hcbs;
  41
  42   if (hooknum>HOOKMAX)
  43     return 1;
  44
  45   hcbs=(HookCallback *)(hooks[hooknum].content);
  46
  47   for(i=0;i<hooks[hooknum].cursi;i++)
  48     if(hcbs[i]==callback) {
  49       array_delslot(&(hooks[hooknum]),i);
  50       return 0;
  51     }
  52
  53   return 1;
  54 }
  55
  56 void triggerhook(int hooknum, void *arg) {
  57   int i;
  58   HookCallback *hcbs;
  59
  60   if (hooknum>HOOKMAX)
  61     return;
  62
  63   hcbs=(HookCallback *)(hooks[hooknum].content);
  64   for (i=0;i<hooks[hooknum].cursi;i++) {
  65     (hcbs[i])(hooknum, arg);
  66   }
  67 }
  68