src/protocols/zephyr/ZCkIfNot.c

   1 /* This file is part of the Project Athena Zephyr Notification System.
   2  * It contains source for the ZCheckIfNotice function.
   3  *
   4  *      Created by:     Robert French
   5  *
   6  *      $Source$
   7  *      $Author: warmenhoven $
   8  *
   9  *      Copyright (c) 1987,1988 by the Massachusetts Institute of Technology.
  10  *      For copying and distribution information, see the file
  11  *      "mit-copyright.h".
  12  */
  13 /* $Header$ */
  14
  15 #include <internal.h>
  16
  17 #ifndef lint
  18 static const char rcsid_ZCheckIfNotice_c[] = "$Id: ZCkIfNot.c 2096 2001-07-31 01:00:39Z warmenhoven $";
  19 #endif
  20
  21 Code_t ZCheckIfNotice(notice, from, predicate, args)
  22     ZNotice_t *notice;
  23     struct sockaddr_in *from;
  24     register int (*predicate) __P((ZNotice_t *, void *));
  25     void *args;
  26 {
  27     ZNotice_t tmpnotice;
  28     Code_t retval;
  29     register char *buffer;
  30     register struct _Z_InputQ *qptr;
  31
  32     if ((retval = Z_ReadEnqueue()) != ZERR_NONE)
  33         return (retval);
  34
  35     qptr = Z_GetFirstComplete();
  36
  37     while (qptr) {
  38         if ((retval = ZParseNotice(qptr->packet, qptr->packet_len,
  39                                    &tmpnotice)) != ZERR_NONE)
  40             return (retval);
  41         if ((*predicate)(&tmpnotice, args)) {
  42             if (!(buffer = (char *) malloc((unsigned) qptr->packet_len)))
  43                 return (ENOMEM);
  44             (void) memcpy(buffer, qptr->packet, qptr->packet_len);
  45             if (from)
  46                 *from = qptr->from;
  47             if ((retval = ZParseNotice(buffer, qptr->packet_len,
  48                                        notice)) != ZERR_NONE) {
  49                 free(buffer);
  50                 return (retval);
  51             }
  52             Z_RemQueue(qptr);
  53             return (ZERR_NONE);
  54         }
  55         qptr = Z_GetNextComplete(qptr);
  56     }
  57
  58     return (ZERR_NONOTICE);
  59 }