From a0db52c69f70e1a859a5c90a3982cf3dcc64a0a4 Mon Sep 17 00:00:00 2001
From: steve <steve>
Date: Mon, 25 Jun 2001 03:11:41 +0000
Subject: [PATCH]  More robust about incorrect arguments.

---
 vpi/sys_display.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/vpi/sys_display.c b/vpi/sys_display.c
index 6b5eec6d3..0b561f41b 100644
--- a/vpi/sys_display.c
+++ b/vpi/sys_display.c
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: sys_display.c,v 1.24 2001/03/22 02:23:40 steve Exp $"
+#ident "$Id: sys_display.c,v 1.25 2001/06/25 03:11:41 steve Exp $"
 #endif
 
 # include  "vpi_user.h"
@@ -425,14 +425,18 @@ static int sys_fopen_calltf(char *name)
 
       vpiHandle call_handle = vpi_handle(vpiSysTfCall, 0);
       vpiHandle argv = vpi_iterate(vpiArgument, call_handle);
-      vpiHandle item = vpi_scan(argv);
-      vpiHandle mode = vpi_scan(argv);
+      vpiHandle item = argv ? vpi_scan(argv) : 0;
+      vpiHandle mode = item ? vpi_scan(argv) : 0;
 
       if (item == 0) {
 	    vpi_printf("%s: file name parameter missing.\n", name);
 	    return 0;
       }
 
+      if (mode == 0) {
+	    argv = 0;
+      }
+
       if (vpi_get(vpiType, item) != vpiConstant) {
 	    vpi_printf("ERROR: %s parameter must be a constant\n", name);
 	    vpi_free_object(argv);
@@ -717,6 +721,9 @@ void sys_display_register()
 
 /*
  * $Log: sys_display.c,v $
+ * Revision 1.25  2001/06/25 03:11:41  steve
+ *  More robust about incorrect arguments.
+ *
  * Revision 1.24  2001/03/22 02:23:40  steve
  *  fgetc patch from Peter Monta.
  *