adding zephyr-im master branch

lib/ZCkIfNot.c

@@ -0,0 +1,57 @@
+/* This file is part of the Project Athena Zephyr Notification System.
+ * It contains source for the ZCheckIfNotice function.
+ *
+ *	Created by:	Robert French
+ *
+ *	$Id$
+ *
+ *	Copyright (c) 1987,1988 by the Massachusetts Institute of Technology.
+ *	For copying and distribution information, see the file
+ *	"mit-copyright.h". 
+ */
+
+#include <internal.h>
+
+#ifndef lint
+static const char rcsid_ZCheckIfNotice_c[] = "$Id$";
+#endif
+
+Code_t
+ZCheckIfNotice(ZNotice_t *notice,
+	       struct sockaddr_in *from,
+	       register int (*predicate)(ZNotice_t *, void *),
+	       void *args)
+{
+    ZNotice_t tmpnotice;
+    Code_t retval;
+    register char *buffer;
+    register struct _Z_InputQ *qptr;
+
+    if ((retval = Z_ReadEnqueue()) != ZERR_NONE)
+	return (retval);
+	
+    qptr = Z_GetFirstComplete();
+    
+    while (qptr) {
+	if ((retval = ZParseNotice(qptr->packet, qptr->packet_len, 
+				   &tmpnotice)) != ZERR_NONE)
+	    return (retval);
+	if ((*predicate)(&tmpnotice, args)) {
+	    if (!(buffer = (char *) malloc((unsigned) qptr->packet_len)))
+		return (ENOMEM);
+	    (void) memcpy(buffer, qptr->packet, qptr->packet_len);
+	    if (from)
+		*from = qptr->from;
+	    if ((retval = ZParseNotice(buffer, qptr->packet_len, 
+				       notice)) != ZERR_NONE) {
+		free(buffer);
+		return (retval);
+	    }
+	    Z_RemQueue(qptr);
+	    return (ZERR_NONE);
+	} 
+	qptr = Z_GetNextComplete(qptr);
+    }
+
+    return (ZERR_NONOTICE);
+}