src/protocols/zephyr/ZGetSubs.c

   1 /* This file is part of the Project Athena Zephyr Notification System.
   2  * It contains source for the ZGetSubscriptions function.
   3  *
   4  *      Created by:     Robert French
   5  *
   6  *      $Source$
   7  *      $Author: warmenhoven $
   8  *
   9  *      Copyright (c) 1987 by the Massachusetts Institute of Technology.
  10  *      For copying and distribution information, see the file
  11  *      "mit-copyright.h".
  12  */
  13 /* $Header$ */
  14
  15 #ifndef lint
  16 static char rcsid_ZGetSubscriptions_c[] = "$Header$";
  17 #endif
  18
  19 #include <internal.h>
  20
  21 #define min(a,b) ((a)<(b)?(a):(b))
  22
  23 Code_t ZGetSubscriptions(subscription, numsubs)
  24     ZSubscription_t *subscription;
  25     int *numsubs;
  26 {
  27     int i;
  28
  29     if (!__subscriptions_list)
  30         return (ZERR_NOSUBSCRIPTIONS);
  31
  32     if (__subscriptions_next == __subscriptions_num)
  33         return (ZERR_NOMORESUBSCRIPTIONS);
  34
  35     for (i=0;i<min(*numsubs, __subscriptions_num-__subscriptions_next);i++)
  36         subscription[i] = __subscriptions_list[i+__subscriptions_next];
  37
  38     if (__subscriptions_num-__subscriptions_next < *numsubs)
  39         *numsubs = __subscriptions_num-__subscriptions_next;
  40
  41     __subscriptions_next += *numsubs;
  42
  43     return (ZERR_NONE);
  44 }