Extended the "cifmaxwidth" function to include the option "both",

which has the same meaning as the "maxwidth" function ("both"
checks either tile dimension to see if it exceeds the maximum).
This is a simple per-tile check and assumes that violations do
not occur across multiple tiles.  This should be sufficient for
most checks.

Author: RTimothyEdwards

VERSION

@@ -1 +1 @@
-8.3.504
+8.3.505

drc/DRCcif.c

@@ -1268,11 +1268,12 @@ drcCifMaxwidth(argc, argv)
          return (0);
     }
 
-    if (strcmp(bends,"bend_illegal") == 0) bend =0;
-    else if (strcmp(bends,"bend_ok") == 0) bend =DRC_BENDS;
+    if (strcmp(bends, "bend_illegal") == 0) bend = 0;
+    else if (strcmp(bends, "bend_ok") == 0) bend = DRC_BENDS;
+    else if (strcmp(bends, "both") == 0) bend = DRC_MAXWIDTH_BOTH;
     else
     {
-    	 TechError("unknown bend option %s\n",bends);
+    	 TechError("unknown bend option %s\n", bends);
 	 return (0);
     }
 
@@ -1447,10 +1448,35 @@ drcCheckCifMaxwidth(starttile,arg,cptr)
     if (DRCstack == (Stack *) NULL)
 	DRCstack = StackNew(64);
 
-    /* if bends are allowed, just check on a tile-by-tile basis that
-        one dimension is the max.  This is pretty stupid, but it correctly
-	calculates the trench width rule. dcs 12.06.89 */
-    if (cptr->drcc_flags & DRC_BENDS)
+    /* If bends are allowed, just check on a tile-by-tile basis that
+     * both dimensions exceed the max.  This is pretty stupid, but it
+     * correctly calculates, e.g., the trench width rule. dcs 12.06.89
+     *
+     * Do the same for the "both" case, checking on a tile-by-tile basis
+     * that either dimension exceeds the max.
+     */
+
+    if (cptr->drcc_flags & DRC_MAXWIDTH_BOTH)
+    {
+	 Rect	rect;
+	 TiToRect(starttile,&rect);
+	 if ((rect.r_xtop-rect.r_xbot > edgelimit) ||
+	    (rect.r_ytop-rect.r_ybot > edgelimit))
+	 {
+              rect.r_xbot /= scale;
+              rect.r_xtop /= scale;
+              rect.r_ybot /= scale;
+              rect.r_ytop /= scale;
+	      GeoClip(&rect, arg->dCD_clip);
+	      if (!GEO_RECTNULL(&rect)) {
+		  (*(arg->dCD_function)) (arg->dCD_celldef, &rect,
+			arg->dCD_cptr, arg->dCD_clientData);
+		  (*(arg->dCD_errors))++;
+	     }
+	 }
+	 return;
+    }
+    else if (cptr->drcc_flags & DRC_BENDS)
     {
 	 Rect	rect;
 	 TiToRect(starttile,&rect);
@@ -1470,7 +1496,9 @@ drcCheckCifMaxwidth(starttile,arg,cptr)
 	 }
 	 return;
     }
+
     /* Mark this tile as pending and push it */
+
     PUSHTILE(starttile);
     TiToRect(starttile,&boundrect);