Merge branch 'master' into netgen-1.5

then flattening instances of that cell can cause a port of the parent
cell connected to the disconnected port of the child cell to itself
become disconnected.  If the parent port is not changed to show the
disconnected state, then pin mismatch can occur if the netlist being
matched didn't have the same flattened subcell.  This condition is
now detected and handled correctly.

VERSION

@@ -1 +1 @@
-1.5.229
+1.5.236

base/flatten.c

@@ -243,6 +243,13 @@ void flattenCell(char *name, int file)
   ThisCell->dumped = 1;		/* indicate cell has been flattened */
 }
 
+/* Structure used to keep track of nodes needing checking */
+
+struct linkednode {
+    int node;
+    struct linkednode *next;
+};
+
 /*--------------------------------------------------------------*/
 /* flattenInstancesOf --					*/
 /*								*/
@@ -265,6 +272,7 @@ int flattenInstancesOf(char *name, int fnum, char *instance)
   struct nlist *ThisCell;
   struct  nlist *ChildCell;
   struct objlist *tmp, *ob2, *ob3;
+  struct linkednode *checknodes = NULL, *newlnode, *chknode;
   int	notdone, rnodenum;
   char	tmpstr[1024];
   int	nextnode, oldmax, numflat = 0;
@@ -416,6 +424,16 @@ int flattenInstancesOf(char *name, int fnum, char *instance)
 	          }
 	          UpdateNodeNumbers(ChildStart, tmp->node, ob2->node);
 	     }
+	     else if (tmp->node == -1) {
+		 /* Opposite case:  If child port is an unconnected node, then	*/
+		 /* removing the instance may make the parent node become	*/
+		 /* unconnected.  For now, just record the node number.  At the	*/
+		 /* end we'll check if these nodes are actually disconnected.	*/
+		 newlnode = (struct linkednode *)MALLOC(sizeof(struct linkednode));
+		 newlnode->node = ob2->node;
+		 newlnode->next = checknodes;
+		 checknodes = newlnode;
+	     }
 
 	     /* in pathological cases, the lengths of the port lists may
               * change.  This is an error, but that is no reason to allow
@@ -598,6 +616,29 @@ int flattenInstancesOf(char *name, int fnum, char *instance)
       NextObj = ParentParams;
     }				/* repeat until no more instances found */
   }
+
+  /* Check nodes that may have become disconnected after child flattening */
+  while (checknodes != NULL) {
+     struct objlist *portnode = NULL;
+
+     chknode = checknodes;
+     checknodes = checknodes->next;
+
+     for (ob3 = ThisCell->cell; ob3; ob3 = ob3->next) {
+	if ((ob3->type != PORT) && (portnode == NULL))
+	   break;
+	else if ((ob3->type == PORT) && (ob3->node == chknode->node))
+	   portnode = ob3;
+	else if ((ob3->type >= FIRSTPIN) && (ob3->node == chknode->node))
+	   break;
+     }
+     if ((ob3 == NULL) && (portnode != NULL)) {
+        /* Port became disconnected when child was flattened */
+        portnode->node = -1;
+     }
+     FREE(chknode);
+  }
+
   CacheNodeNames(ThisCell);
   ThisCell->dumped = 1;		/* indicate cell has been flattened */
   return numflat;

base/netcmp.c

@@ -5005,6 +5005,11 @@ int PropertyOptimize(struct objlist *ob, struct nlist *tp, int run, int series,
 		  // find ith record in ob
 		  p = 0;
 		  for (ob2 = ob; p != i; ob2 = ob2->next, p++);
+		  /* Sanity check */
+		  if (ob2->type != PROPERTY) {
+    		     Fprintf(stderr, "Incorrect property run count!\n");
+		     continue;
+		  }
 		  // Count entries, add one, reallocate
 		  for (p = 0;; p++) {
 		     vl = &ob2->instance.props[p];

tcltk/netgen.tcl.in

@@ -62,16 +62,18 @@ proc netgen::convert_to_json {filename lvs_final} {
 	          puts $fjson "      \["
 		  set cktval [lindex $value 0]
 		  foreach pin [lrange $cktval 0 end-1] {
-		     puts $fjson "        \"$pin\","
+		     set pinstr [string map {"\\" "\\\\"} $pin]
+		     puts $fjson "        \"$pinstr\","
 		  }
-		  set pin [lindex $cktval end]
+		  set pin [string map {"\\" "\\\\"} [lindex $cktval end]]
 		  puts $fjson "        \"$pin\""
 	          puts $fjson "      \], \["
 		  set cktval [lindex $value 1]
 		  foreach pin [lrange $cktval 0 end-1] {
-		     puts $fjson "        \"$pin\","
+		     set pinstr [string map {"\\" "\\\\"} $pin]
+		     puts $fjson "        \"$pinstr\","
 		  }
-		  set pin [lindex $cktval end]
+		  set pin [string map {"\\" "\\\\"} [lindex $cktval end]]
 		  puts $fjson "        \"$pin\""
 	          puts $fjson "      \]"
 		  if {$kidx == $nkeys} {

tcltk/tclnetgen.c

@@ -2650,6 +2650,14 @@ _netcmp_verify(ClientData clientData,
 	 else
 	     Fprintf(stdout, "Netlists do not match.\n");
       }
+      else if (automorphisms == -2) {
+	 if (index == EQUIV_IDX)
+	    Tcl_SetObjResult(interp, Tcl_NewBooleanObj(1));
+	 else if (index == UNIQUE_IDX)
+	    Tcl_SetObjResult(interp, Tcl_NewIntObj(-2));
+	 else if (index > 0)
+	    Fprintf(stdout, "Circuits match uniquely with port errors.\n");
+      }
       else {
 	 if (automorphisms) {
 	    if (index == EQUIV_IDX)