Merge branch 'master' into netgen-1.5

tracker #96) in which a subcircuit with only one port (in this
case, a pad) but which has properties (in this case, "M") will
fail to set the pointer position ahead of the property because
the loop starts after the first pin, so it has already missed
the position that needs to be saved.  Fixed by initializing
the value to the first pin position before starting the loop.

VERSION

@@ -1 +1 @@
-1.5.256
+1.5.293

base/ext.c

@@ -31,6 +31,8 @@ the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
 #include "print.h"
 #include "hash.h"
 
+static int invlambda = 100;	/* Used in sim and prm files */
+
 void extCell(char *name, int filenum)
 {
   struct nlist *tp, *tp2;
@@ -450,7 +452,8 @@ void simCell(char *name, int filenum)
   struct nlist *tp, *tp2;
   struct objlist *ob, *ob2;
   char FileName[500], simclass;
-  short i;
+  char writeLine[1024], paramString[128];
+  short i, p, mult;
   double l, w, v;
 
   tp = LookupCellFile(name, filenum);
@@ -478,9 +481,9 @@ void simCell(char *name, int filenum)
   }
 
   /* print out header list */
-  /* distance units are multiplied by 100 (distances are in um) */
+  /* distance units are multiplied by invlambda */
 
-  FlushString("| units: 100    tech: scmos\n");
+  FlushString("| units: %d    tech: scmos\n", 100 * invlambda);
 
   /* now run through cell's contents, print instances */
   for (ob = tp->cell; ob != NULL; ob = ob->next) {
@@ -516,13 +519,17 @@ void simCell(char *name, int filenum)
 	 case CLASS_NPN:
 	    simclass = 'b';
 	    break;	
-	 default:
+	 case CLASS_SUBCKT:
+	 case CLASS_MODULE:
 	    simclass = 'x';
 	    break;	
+	 default:
+	    simclass = '|';
+	    break;	
       }
 
       if (simclass != 'x')
-         FlushString("%c", simclass);
+	 FlushString("%c", simclass);
 
       switch (tp2->class) {
 	 case CLASS_NMOS: case CLASS_NMOS4:
@@ -590,6 +597,115 @@ void simCell(char *name, int filenum)
 	    FlushString(" %g\n", v);   
 	    break;
 
+	 case CLASS_MODULE:
+	    *writeLine = 'x';
+	    *(writeLine + 1) = '\0';
+	    mult = 1;
+
+	    /* Important---Need to look up the cell definition;  if
+	     * the first pin is "drain" then it is a FET, and pins
+	     * get swapped from D-G-S-B to G-S-D-B.  Source and drain
+	     * are treated here as equivalent because the .sim format
+	     * has no concept of an asymmetric source and drain.
+	     */
+	    ob2 = tp2->cell;
+	    if ((*matchfunc)(ob2->next->name, "gate"))
+	    {
+	      strcat(writeLine, " ");
+	      strcat(writeLine, NodeAlias(tp, ob->next));
+	      strcat(writeLine, " ");
+	      strcat(writeLine, NodeAlias(tp, ob));
+	      ob2 = ob->next->next;
+	    }
+	    else
+	      ob2 = ob;
+
+	    while (ob2 != NULL) {
+	      strcat(writeLine, " ");
+	      strcat(writeLine, NodeAlias(tp, ob2));
+	      ob2 = ob2->next;
+	      if ((ob2 == NULL) || (ob2->type <= FIRSTPIN)) break;
+	    }
+
+	    if (ob2 && ob2->type == PROPERTY) {
+	       struct valuelist *vl;
+	       /* Only known parameters are L, W, X, and Y */
+	       for (p = 0;; p++) {
+	          vl = (struct valuelist *)(&(ob2->instance.props[p]));
+		  if (vl->type == PROP_ENDLIST) {
+	             strcat(writeLine, " l=1");   
+		     break;
+		  }
+		  else if ((*matchfunc)(vl->key, "L")) {
+	             v = vl->value.dval;
+	             sprintf(paramString, " l=%d", (int)(0.5 + (v * invlambda)));   
+	             strcat(writeLine, paramString);
+		     break;
+		  }
+	       }
+	       for (p = 0;; p++) {
+	          vl = (struct valuelist *)(&(ob2->instance.props[p]));
+		  if (vl->type == PROP_ENDLIST) {
+	             strcat(writeLine, " w=1");   
+		     break;
+		  }
+		  else if ((*matchfunc)(vl->key, "W")) {
+	             v = vl->value.dval;
+	             sprintf(paramString, " w=%d", (int)(0.5 + (v * invlambda)));   
+	             strcat(writeLine, paramString);
+		     break;
+		  }
+	       }
+	       for (p = 0;; p++) {
+	          vl = (struct valuelist *)(&(ob2->instance.props[p]));
+		  if (vl->type == PROP_ENDLIST) {
+	             strcat(writeLine, " x=0");   
+		     break;
+		  }
+		  else if ((*matchfunc)(vl->key, "X")) {
+	             i = vl->value.ival;
+	             sprintf(paramString, " x=%d", i);
+	             strcat(writeLine, paramString);
+		     break;
+		  }
+	       }
+	       for (p = 0;; p++) {
+	          vl = (struct valuelist *)(&(ob2->instance.props[p]));
+		  if (vl->type == PROP_ENDLIST) {
+	             strcat(writeLine, " y=0");   
+		     break;
+		  }
+		  else if ((*matchfunc)(vl->key, "Y")) {
+	             i = vl->value.ival;
+	             sprintf(paramString, " y=%d", i);
+	             strcat(writeLine, paramString);
+		  }
+	       }
+	       for (p = 0;; p++) {
+	          vl = (struct valuelist *)(&(ob2->instance.props[p]));
+		  if (vl->type == PROP_ENDLIST) {
+		     break;
+		  }
+		  else if ((*matchfunc)(vl->key, "M")) {
+		     if (vl->type == PROP_INTEGER)
+	                mult = vl->value.ival;
+		     else
+	                mult = vl->value.dval;
+		  }
+	       }
+	    }
+	    strcat(writeLine, " ");
+	    strcat(writeLine, tp2->name);   
+	    strcat(writeLine, "\n");   
+
+	    /* Multiple instances (M != 1) are written multiple times.
+	     * NF is ignored in favor of having a single device with
+	     * the total width.
+	     */
+	    for (i = 0; i < mult; i++)
+		FlushString(writeLine);
+	    break;
+
 	 default:
 	    FlushString("| unhandled component %s\n", tp2->name);   
 	    break;
@@ -626,6 +742,181 @@ int StrIsInt(char *s)
     return (1);
 }
 
+/*------------------------------------------------------*/
+/* Read a .prm format file.  This is specifically to	*/
+/* get the "device" lines that indicate how a SPICE	*/
+/* subcircuit model or a .sim "x" record needs to be	*/
+/* translated into a specific component type like a	*/
+/* FET, diode, resistor, etc.				*/
+/*------------------------------------------------------*/
+
+char *ReadPrm(char *fname, int *fnum)
+{
+  int filenum;
+  struct keyvalue *kvlist = NULL;
+  struct nlist *tp;
+
+  if ((filenum = OpenParseFile(fname, *fnum)) < 0) {
+    char name[MAX_STR_LEN];
+
+    SetExtension(name, fname, PRM_EXTENSION);
+    if (OpenParseFile(name, *fnum) < 0) {
+      Printf("Error in prm file read: No file %s\n",name);
+      *fnum = filenum;
+      return NULL;
+    }    
+  }
+
+  /* Make sure all .prm file reading is case INsensitive */
+  /* This is because the only reason to read a PRM file	 */
+  /* is to find all the subcircuit device types	so that	 */
+  /* a SPICE file can be read and a SIM file written.	 */
+
+  matchfunc = matchnocase;
+  matchintfunc = matchfile;
+  hashfunc = hashnocase;
+
+  CellDef(fname, filenum);
+
+  while (!EndParseFile()) {
+    char devicename[MAX_STR_LEN];
+    SkipTok(NULL);
+
+    if (EndParseFile()) break;
+    if (nexttok[0] == ';') continue;		/* Comment line */
+    else if (nexttok[0] == '\0') continue;	/* Blank line */
+    else if (match(nexttok, "lambda")) {
+      SkipTok(NULL);
+      invlambda = (int)(0.5 + (1.0 / atof(nexttok)));
+      SkipNewLine(NULL); /* skip any attributes */
+    }
+    else if (match(nexttok, "device")) {
+      SkipTok(NULL);
+      if (match(nexttok, "nfet")) {
+	 SkipTok(NULL);
+	 strcpy(devicename, nexttok);
+	 /* Create 4-terminal nfet subcircuit device record */
+	 if (LookupCellFile(devicename, filenum) == NULL) {
+	     CellDef(devicename, filenum);
+	     Port("drain");
+	     Port("gate");
+	     Port("source");
+	     Port("bulk");
+	     PropertyDouble(devicename, filenum, "l", 0.01, 0.0);
+	     PropertyDouble(devicename, filenum, "w", 0.01, 0.0);
+	     PropertyInteger(devicename, filenum, "nf", 0, 1);
+	     PropertyInteger(devicename, filenum, "m", 0, 1);
+	     SetClass(CLASS_MODULE);
+	     EndCell();
+	     ReopenCellDef(fname, filenum);
+	 }
+         LinkProperties(devicename, kvlist);
+         SkipNewLine(NULL); /* skip any attributes */
+      }
+      else if (match(nexttok, "pfet")) {
+	 SkipTok(NULL);
+	 strcpy(devicename, nexttok);
+	 /* Create 4-terminal pfet subcircuit device record */
+	 if (LookupCellFile(devicename, filenum) == NULL) {
+	     CellDef(devicename, filenum);
+	     Port("drain");
+	     Port("gate");
+	     Port("source");
+	     Port("well");
+	     PropertyDouble(devicename, filenum, "l", 0.01, 0.0);
+	     PropertyDouble(devicename, filenum, "w", 0.01, 0.0);
+	     PropertyInteger(devicename, filenum, "nf", 0, 1);
+	     PropertyInteger(devicename, filenum, "m", 0, 1);
+	     SetClass(CLASS_MODULE);
+	     EndCell();
+	     ReopenCellDef(fname, filenum);
+	 }
+         LinkProperties(devicename, kvlist);
+         SkipNewLine(NULL); /* skip various attributes */
+      }
+      else if (match(nexttok, "resistor")) {
+	 SkipTok(NULL);
+	 strcpy(devicename, nexttok);
+	 /* Resistor device has additional record for the value */
+	 /* (Need to do something with this. . . ?) */
+	 SkipTok(NULL);
+	 /* Create resistor subcircuit device record */
+         if (LookupCellFile(devicename, filenum) == NULL) {
+            CellDef(devicename, filenum);
+            Port("end_a");
+            Port("end_b");
+            PropertyDouble(devicename, filenum, "value", 0.01, 0.0);
+	    PropertyDouble(devicename, filenum, "l", 0.01, 0.0);
+	    PropertyDouble(devicename, filenum, "w", 0.01, 0.0);
+	    PropertyInteger(devicename, filenum, "m", 0, 1);
+            SetClass(CLASS_MODULE);
+            EndCell();
+            ReopenCellDef(fname, filenum);
+         }
+	 LinkProperties(devicename, kvlist);
+         SkipNewLine(NULL); /* skip various attributes */
+      }
+      else if (match(nexttok, "capacitor")) {
+	 SkipTok(NULL);
+	 strcpy(devicename, nexttok);
+	 /* Capacitor device has additional record for the value */
+	 /* (Need to do something with this. . . ?) */
+	 SkipTok(NULL);
+	 /* Create capacitor subcircuit device record */
+         if (LookupCellFile(devicename, filenum) == NULL) {
+            CellDef(devicename, filenum);
+            Port("top");
+            Port("bottom");
+            PropertyDouble(devicename, filenum, "value", 0.01, 0.0);
+	    PropertyDouble(devicename, filenum, "l", 0.01, 0.0);
+	    PropertyDouble(devicename, filenum, "w", 0.01, 0.0);
+	    PropertyInteger(devicename, filenum, "m", 0, 1);
+            SetClass(CLASS_MODULE);
+            EndCell();
+            ReopenCellDef(fname, filenum);  /* Reopen */
+         }
+	 LinkProperties(devicename, kvlist);
+         SkipNewLine(NULL);
+      }
+      else if (match(nexttok, "diode")) {
+	 SkipTok(NULL);
+	 strcpy(devicename, nexttok);
+	 /* Create diode subcircuit device record */
+         if (LookupCellFile(devicename, filenum) == NULL) {
+            CellDef(devicename, filenum);
+            Port("anode");
+            Port("cathode");
+	    PropertyInteger(devicename, filenum, "m", 0, 1);
+            SetClass(CLASS_MODULE);
+            EndCell();
+            ReopenCellDef(fname, filenum);  /* Reopen */
+         }
+	 LinkProperties(devicename, kvlist);
+         SkipNewLine(NULL);
+      }
+      else {
+	Printf("Unknown device type in .prm: '%s'\n", nexttok);
+        InputParseError(stderr);
+        SkipNewLine(NULL);
+      }
+    }
+    else {
+      /* Could spell out all the keywords used in .prm files    */
+      /* but probably not worth the effort.                     */
+      SkipNewLine(NULL);
+    }
+    DeleteProperties(&kvlist);
+  }
+  EndCell();
+  CloseParseFile();
+
+  tp = LookupCellFile(fname, filenum);
+  if (tp) tp->flags |= CELL_TOP;
+
+  *fnum = filenum;
+  return fname;
+}
+
 /*-------------------------*/
 /* Read a .sim format file */
 /*-------------------------*/
@@ -644,7 +935,7 @@ char *ReadSim(char *fname, int *fnum)
 
     SetExtension(name, fname, SIM_EXTENSION);
     if (OpenParseFile(name, *fnum) < 0) {
-      Printf("Error in ext file read: No file %s\n",name);
+      Printf("Error in sim file read: No file %s\n",name);
       *fnum = filenum;
       return NULL;
     }    
@@ -847,7 +1138,7 @@ char *ReadSim(char *fname, int *fnum)
     }
     else if (match(nexttok, "r")) {	/* 2-port resistors */
       if (IgnoreRC) {
-	/* ignore all capacitances */
+	/* ignore all resistances */
 	SkipNewLine(NULL);
       }
       else {

base/flatten.c

@@ -136,17 +136,16 @@ void flattenCell(char *name, int file)
 	    ob2 = ob2->next;
 	}
     
-
       /* delete all port elements from child */
       while (IsPort(ChildObjList)) {
 	/* delete all ports at beginning of list */
 	if (Debug) Printf("deleting leading port from child\n");
 	tmp = ChildObjList->next;
 	FreeObjectAndHash(ChildObjList, ChildCell);
-	ChildObjList = tmp;
+        if ((ChildObjList = tmp) == NULL) break;
       }
       tmp = ChildObjList;
-      while (tmp->next != NULL) {
+      while (tmp && (tmp->next != NULL)) {
 	if (IsPort(tmp->next)) {
 	  ob2 = (tmp->next)->next;
 	  if (Debug) Printf("deleting a port from child\n");
@@ -601,8 +600,10 @@ int flattenInstancesOf(char *name, int fnum, char *instance)
          else break;
 
          /* Put the child cell at the start of ChildObjList */
-         ChildEnd->next = ChildObjList;
-         ChildObjList = ChildStart;
+	 if (ChildEnd) {
+            ChildEnd->next = ChildObjList;
+            ChildObjList = ChildStart;
+	 }
       }
 
       /* Put the child cell at the start of ChildObjList */
@@ -1215,7 +1216,6 @@ int UniquePins(char *name, int filenum)
    firstport = (struct objlist **)CALLOC(maxnode + 1, sizeof(struct objlist *));
 
    portcount = FIRSTPIN;
-   lob = NULL;
    for (ob = ThisCell->cell; ob != NULL; ob = ob->next) {
       if (ob->type != PORT) break;
       if (ob->node > 0) {
@@ -1226,16 +1226,16 @@ int UniquePins(char *name, int filenum)
 			firstport[ob->node]->name, ThisCell->name, ThisCell->file);
 	       /* Do not count this as a duplicate pin. */
 	       nodecount[ob->node]--;
-	       /* Move the pin adjacent to the one it is shorted to (if it	
-		* isn't already);  this will make the work of MatchPins() easier.
+	       /* Note:  Previously there was code here to move the shorted port
+		* next to the pin it is shorted to.  This causes the cell def pins
+		* to become scrambled with respect to the pin order of its instances.
+		* Removed the code 9/1/2023.  But---Not sure if any code depends
+		* on shorted pins being adjacent.
 		*/
-	       if (firstport[ob->node]->next != ob) {
-	          lob->next = ob->next;
-	          ob->next = firstport[ob->node]->next;
-		  firstport[ob->node]->next = ob;
-	          ob = lob;
-	       }
-	       lob = ob;
+	       /* When two pins are shorted, they are by definition permutable */
+	       PermuteSetup(ThisCell->name, ThisCell->file, ob->name,
+			firstport[ob->node]->name);
+
 	       continue;
 	    }
 	    else {
@@ -1256,7 +1256,6 @@ int UniquePins(char *name, int filenum)
 	 }
       }
       portcount++;
-      lob = ob;
    }
 
    if (needscleanup)
@@ -1307,6 +1306,14 @@ int UniquePins(char *name, int filenum)
    return 1;
 }
 
+/* Structure used below for keeping track of node numbers
+ * belonging to removed nodes.
+ */
+struct LinkedNum {
+    int node;
+    struct LinkedNum *next;
+};
+
 /*------------------------------------------------------*/
 /* Callback function for CleanupPins			*/
 /* Note that if the first pin of the instance is a	*/
@@ -1319,6 +1326,7 @@ struct nlist *cleanuppins(struct hashlist *p, void *clientdata)
    struct nlist *ptr;
    struct objlist *ob, *obt, *lob, *nob, *firstpin, *pob;
    struct nlist *tc = (struct nlist *)clientdata;
+   struct LinkedNum *newnodenum, *removedNodes = (struct LinkedNum *)NULL;
    int pinnum;
    char *saveinst = NULL;
 
@@ -1374,6 +1382,15 @@ struct nlist *cleanuppins(struct hashlist *p, void *clientdata)
 		    saveinst = ob->instance.name;
 		}
 		if (ob->model.class != NULL) FREE(ob->model.class);
+
+		// Record the net number of the pin being removed, to
+		// check at the end if the net belonged to a pin that
+		// got orphaned.
+		newnodenum = (struct LinkedNum *)MALLOC(sizeof(struct LinkedNum));
+		newnodenum->node = ob->node;
+		newnodenum->next = removedNodes;
+		removedNodes = newnodenum;
+
 		FREE(ob);
 	     }
 	     else {
@@ -1417,6 +1434,28 @@ struct nlist *cleanuppins(struct hashlist *p, void *clientdata)
       }
    }
 
+   while (removedNodes != NULL) {
+	int nodenum = removedNodes->node;
+	struct objlist *ob2;
+
+	/* Only concerned with nodes that are in the pin list of ptr->cell */
+	for (ob = ptr->cell; ob != NULL; ob = ob->next) {
+	    if (ob->type != PORT) break;
+	    if (ob->node == nodenum) break;
+	}
+	if (ob && (ob->type == PORT)) {
+	    /* Check if this node number exists only in the port record */
+	    for (nob = ob->next; nob != NULL; nob = nob->next)
+		if (nob->node == nodenum) break;
+	    if (nob == NULL) {
+		ob->node = -1;		/* This pin is now disconnected */
+	    }
+	}
+	newnodenum = removedNodes;
+	removedNodes = removedNodes->next;
+	FREE(newnodenum);
+   }
+
    if (saveinst != NULL) FREE(saveinst);
    return NULL;		/* Keep the search going */
 }
@@ -1637,7 +1676,8 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
     ECompare *ecomp, *ncomp;
     ECompList *list0X, *listX0;
     int hascontents1, hascontents2;
-    int match, modified = 0;
+    int match, modified1 = 0, modified2 = 0;
+    int not_top;
 
     if (file1 == -1)
 	tc1 = LookupCell(name1);
@@ -1714,7 +1754,7 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 				" makes a better match\n", ecomp->cell1->name,
 				name1, file1);
 		    flattenInstancesOf(name1, file1, ecomp->cell1->name); 
-		    modified++;
+		    modified1++;
 		}
 		if (ecomp->cell2 && (ecomp->num2 > 0) &&
 				(!(ecomp->cell2->flags & CELL_PLACEHOLDER))) {
@@ -1722,7 +1762,7 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 				" makes a better match\n", ecomp->cell2->name,
 				name2, file2);
 		    flattenInstancesOf(name2, file2, ecomp->cell2->name); 
-		    modified++;
+		    modified2++;
 		}
 	    }
 
@@ -1812,7 +1852,7 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 				" makes a better match\n", ecomp->cell2->name,
 				name2, file2);
 		    	flattenInstancesOf(name2, file2, ecomp->cell2->name); 
-		    	modified++;
+		    	modified2++;
 		    }
 		}
 	    }
@@ -1878,7 +1918,7 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 				" makes a better match\n", ecomp->cell1->name,
 				name1, file1);
 		    	flattenInstancesOf(name1, file1, ecomp->cell1->name); 
-		        modified++;
+		        modified1++;
 		    }
 		}
 	    }
@@ -1908,6 +1948,8 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
     // Remove non-matching zero-value devices.  This can
     // be done on a per-instance basis.
 
+    not_top = (PeekCompareQueueTop(NULL, NULL, NULL, NULL) == -1) ? FALSE : TRUE;
+
     ecomp = (ECompare *)HashFirst(&compdict);
     while (ecomp != NULL) {
 	if ((ecomp->num1 != ecomp->num2) && (ecomp->cell1 != NULL) &&
@@ -1954,6 +1996,33 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 						    break;
 					    }
 					}
+
+					/* Do NOT remove shorting devices that	*/
+					/* connect two ports.  Otherwise the	*/
+					/* port lists get screwed up.  It is	*/
+					/* better in that case to force the	*/
+					/* cells to be declared mismatched.	*/
+					/* This is ignored for a top-level cell	*/
+					/* because it will just show up as a	*/
+					/* port mismatch error as it should.	*/
+
+					if ((not_top == TRUE) &&
+						(ecomp->cell1->class != CLASS_ISOURCE)) {
+					    int found1 = FALSE;
+					    int found2 = FALSE;
+					    for (ob2 = tc1->cell; ob2; ob2 = ob2->next) {
+						if (!IsPort(ob2)) break;
+						else if (ob2->node == node1)
+						    found1 = TRUE;
+						else if (ob2->node == node2)
+						    found2 = TRUE;
+						if (found1 && found2) {
+						    found = FALSE;
+						    break;
+						}
+					    }
+					}
+
 					if (found) break;
 				    }
 				    if (found) {
@@ -2003,7 +2072,7 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 
 					/* Remove from list */
 					ecomp->num1--;
-					modified++;
+					modified1++;
 
 					ob1 = lob;
 				    }
@@ -2075,6 +2144,27 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 						    break;
 					    }
 					}
+
+					/* (See comments above about removing shorts */
+					/* between two ports.)			     */
+
+					if ((not_top == TRUE) &&
+						(ecomp->cell2->class != CLASS_ISOURCE)) {
+					    int found1 = FALSE;
+					    int found2 = FALSE;
+					    for (ob1 = tc2->cell; ob1; ob1 = ob1->next) {
+						if (!IsPort(ob1))  break;
+						else if (ob1->node == node1)
+						    found1 = TRUE;
+						else if (ob1->node == node2)
+						    found2 = TRUE;
+						if (found1 && found2) {
+						    found = FALSE;
+						    break;
+						}
+					    }
+					}
+					
 					if (found) break;
 				    }
 				    if (found) {
@@ -2120,8 +2210,8 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 					}
 
 					/* Remove from list */
-					ecomp->num1--;
-					modified++;
+					ecomp->num2--;
+					modified2++;
 
 					ob2 = lob;
 				    }
@@ -2155,7 +2245,7 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
     // are no other modifications, as this rule is relaxed compared to other
     // rules, and the other rules should be exhaustively applied first.
 
-    if ((listX0 != NULL) && (list0X != NULL) && (modified == 0)) {
+    if ((listX0 != NULL) && (list0X != NULL) && ((modified1 + modified2) == 0)) {
 	ECompare *ecomp0X, *ecompX0;
 	ECompList *elist0X, *elistX0;
 	for (elistX0 = listX0; elistX0; elistX0 = elistX0->next) {
@@ -2187,7 +2277,7 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 				flattenInstancesOf(name1, file1, ecompX0->cell1->name); 
 			        ecompX0->num1 = 0;
 			        ecomp0X->num1 += ecompX0->num1;
-				modified++;
+				modified1++;
 				break;
 			    }
 			}
@@ -2213,7 +2303,7 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 				flattenInstancesOf(name2, file2, ecomp0X->cell2->name); 
 			        ecomp0X->num2 = 0;
 			        ecompX0->num2 += ecomp0X->num2;
-				modified++;
+				modified2++;
 				break;
 			    }
 			}
@@ -2244,5 +2334,17 @@ done:
 	FREE(list0X);
 	list0X = nextptr;
     }
-    return modified;
+
+    // If either netlist was modified, rebuild its node cache
+
+    if (modified1 > 0) {
+	FreeNodeNames(tc1);
+	CacheNodeNames(tc1);
+    }
+    if (modified2 > 0) {
+	FreeNodeNames(tc2);
+	CacheNodeNames(tc2);
+    }
+
+    return modified1 + modified2;
 }

base/netcmp.h

@@ -62,7 +62,7 @@ extern void RegroupDataStructures();
 extern void FormatIllegalElementClasses();
 extern void FormatIllegalNodeClasses();
 extern int ResolveAutomorphsByProperty();
-extern int ResolveAutomorphsByPin();
+extern int ResolveAutomorphsByPin(int match_nets);
 extern void SummarizeElementClasses(struct ElementClass *EC);
 extern int remove_group_tags(struct objlist *ob);
 

base/netfile.c

@@ -587,6 +587,12 @@ void SkipTokNoNewline(char *delimiter)
 /*									*/
 /* Modified 3/30/2015 to include the condition where a comment line is	*/
 /* in the middle of a series of continuation lines.			*/
+/*									*/
+/* Modified 1/3/2024 to avoid skipping two lines if a line has only the	*/
+/* comment character '*' followed by a newline.  It seems that '\n' is	*/
+/* being ignored in WHITESPACE_DELIMITER, but it's easier to write the	*/
+/* code to find the exception rather than track down the problem in	*/
+/* GetNextLine().							*/
 /*----------------------------------------------------------------------*/
 
 void SpiceTokNoNewline(void)
@@ -598,8 +604,14 @@ void SpiceTokNoNewline(void)
     while (nexttok == NULL) {
 	contline = getc(infile);
 	if (contline == '*') {
-	   GetNextLine(WHITESPACE_DELIMITER);
-	   SkipNewLine(NULL);
+	   char testline = ' ';
+	   while ((testline == ' ') || (testline == '\t'))
+	      testline = getc(infile);
+           if (testline != '\n') {
+              ungetc(testline, infile);
+	      GetNextLine(WHITESPACE_DELIMITER);
+	      SkipNewLine(NULL);
+	   }
 	   continue;
 	}
 	else if (contline != '+') {
@@ -611,7 +623,8 @@ void SpiceTokNoNewline(void)
 }
 
 /*----------------------------------------------------------------------*/
-/* Skip to the next token, ignoring any C-style comments.		*/
+/* Skip to the next token, ignoring any C-style comments and verilog	*/
+/* "(* ... *)"-style comments.						*/
 /*----------------------------------------------------------------------*/
 
 void SkipTokComments(char *delimiter)
@@ -627,6 +640,11 @@ void SkipTokComments(char *delimiter)
 		SkipTok(delimiter);
 	    if (nexttok) SkipTok(delimiter);
 	}
+	else if (match(nexttok, "(*")) {
+	    while (nexttok && !match(nexttok, "*)"))
+		SkipTok(delimiter);
+	    if (nexttok) SkipTok(delimiter);
+	}
 	else break;
     }
 }
@@ -731,7 +749,7 @@ char *strdtok(char *pstring, char *delim1, char *delim2)
     if (*s == '\\') {
         s++;
         while (*s != '\0') {
-	    if ((*s == ' ') || (*s == '\\')) {
+	    if ((*s == ' ') || ((*s == '\\') && (*(s + 1) == '\0'))) {
 		s++;
 		break;
 	    }
@@ -880,7 +898,7 @@ char *ReadNetlist(char *fname, int *fnum)
   };
   
 #ifdef mips
-  struct filetype formats[7];
+  struct filetype formats[8];
 
   formats[0].extension = NTK_EXTENSION;
   formats[0].proc = ReadNtk;
@@ -888,14 +906,16 @@ char *ReadNetlist(char *fname, int *fnum)
   formats[1].proc = ReadExtHier;
   formats[2].extension = SIM_EXTENSION;
   formats[2].proc = ReadSim;
-  formats[3].extension = SPICE_EXTENSION;
-  formats[3].proc = ReadSpice;
-  formats[4].extension = NETGEN_EXTENSION;
-  formats[4].proc = ReadNetgenFile;
-  formats[5].extension = VERILOG_EXTENSION;
-  formats[5].proc = ReadVerilogFile;
-  formats[6].extension = NULL;
-  formats[6].proc = NULL;
+  formats[3].extension = PRM_EXTENSION;
+  formats[3].proc = ReadPrm;
+  formats[4].extension = SPICE_EXTENSION;
+  formats[4].proc = ReadSpice;
+  formats[5].extension = NETGEN_EXTENSION;
+  formats[5].proc = ReadNetgenFile;
+  formats[6].extension = VERILOG_EXTENSION;
+  formats[6].proc = ReadVerilogFile;
+  formats[7].extension = NULL;
+  formats[7].proc = NULL;
 
 #else  /* not mips (i.e. compiler with reasonable initializers) */
   
@@ -904,6 +924,7 @@ char *ReadNetlist(char *fname, int *fnum)
       {NTK_EXTENSION, ReadNtk},
       {EXT_EXTENSION, ReadExtHier},
       {SIM_EXTENSION, ReadSim},
+      {PRM_EXTENSION, ReadPrm},
       {SPICE_EXTENSION, ReadSpice},
       {SPICE_EXT2, ReadSpice},
       {SPICE_EXT3, ReadSpice},

base/netfile.h

@@ -7,6 +7,7 @@
 #define WOMBAT_EXTENSION ".wom"
 #define EXT_EXTENSION ".ext"
 #define SIM_EXTENSION ".sim"
+#define PRM_EXTENSION ".prm"
 #define SPICE_EXTENSION ".spice"
 #define SPICE_EXT2 ".spc"
 #define SPICE_EXT3 ".sp"

base/netgen.c

@@ -300,7 +300,9 @@ int ReduceOneExpression(struct valuelist *kv, struct objlist *parprops,
 		            tstr = sstr - 1;
 		            numlast = 1;
 			}
-			break;
+			/* But might not be. . . */
+			if ((dval != 0) || (sstr > estr))
+			   break;
 		    }
 		    /* Not a number, so must be arithmetic */
 		    *tstr = '\0';
@@ -320,7 +322,9 @@ int ReduceOneExpression(struct valuelist *kv, struct objlist *parprops,
 			    tstr = sstr - 1;
 			    numlast = 1;
 			}
-			break;
+			/* But might not be. . . */
+			if ((dval != 0) || (sstr > estr))
+			   break;
 		    }
 		    /* Not a number, so must be arithmetic */
 		    *tstr = '\0';
@@ -3090,7 +3094,7 @@ void add_balancing_close(struct objlist *ob1, struct objlist *ob2)
    for (nob = ob1->next; nob && nob->type != FIRSTPIN; nob = nob->next)
       if (nob->type == PROPERTY)
 	 break;
-   if (nob->type != PROPERTY) return;	// shouldn't happen
+   if (nob == NULL || nob->type != PROPERTY) return;	// shouldn't happen
 
    opentags = 0;
    for (; nob->next && nob->next->type == PROPERTY; nob = nob->next) {
@@ -3640,7 +3644,7 @@ int CombineSeries(char *model, int file)
 	       nob->type = PROPERTY;
 	       nob->name = strsave("properties");
 	       nob->node = -2;	/* Don't report as disconnected node */
-	       nob->model.class = (obp->model.class == NULL) ? NULL :
+	       nob->model.class = (obp == NULL || obp->model.class == NULL) ? NULL :
 				strsave(obp->model.class);
 	       nob->instance.props = NewPropValue(2);
 

base/netgen.h

@@ -191,6 +191,7 @@ extern char *ReadNtk (char *fname, int *fnum);
 extern char *ReadExtHier(char *fname, int *fnum);
 extern char *ReadExtFlat(char *fname, int *fnum);
 extern char *ReadSim(char *fname, int *fnum);
+extern char *ReadPrm(char *fname, int *fnum);
 extern char *ReadSpice(char *fname, int *fnum);
 extern char *ReadSpiceLib(char *fname, int *fnum);
 extern char *ReadNetgenFile (char *fname, int *fnum);

base/objlist.c

@@ -223,12 +223,35 @@ int matchnocase(char *st1, char *st2)
 {
    char *sp1 = st1;
    char *sp2 = st2;
+   char v1 = FALSE, v2 = FALSE;
+
+   /* In case of a property that does not exist in one netlist, matchnocase()
+    * may be passed a null value, so return 0 to indicate a non-match.
+    * *Both* values null will also be treated as a mismatch (debatable
+    * behavior).
+    */
+   if (!sp1 || !sp2) return 0;
+
+   /* Verilog back-slash escaped names should match an equivalent non-
+    * back-slashed name.  (NOTE: This behavior needs to be added to match().)
+    */
+   if ((*sp1 == '\\') && (*sp2 != '\\')) {
+      v1 = TRUE;
+      sp1++;
+   }
+   if ((*sp2 == '\\') && (*sp1 != '\\')) {
+      v2 = TRUE;
+      sp2++;
+   }
 
    while (*sp1 != '\0' && *sp2 != '\0') {
       if (to_lower[*sp1] != to_lower[*sp2]) break;
       sp1++;
       sp2++;
    }
+   if (v1 && (*sp1 == ' ')) sp1++;
+   if (v2 && (*sp2 == ' ')) sp2++;
+
    if ((*sp1 != '\0') || (*sp2 != '\0')) return 0;
    return 1;
 }
@@ -596,65 +619,65 @@ int freeprop(struct hashlist *p)
 
 void CellDelete(char *name, int fnum)
 {
-  /* delete all the contents of cell 'name', and remove 'name' from
-     the cell hash table.  NOTE:  this procedure does not care or check
-     if 'name' has been instanced anywhere.  It is assumed that if this
-     is the case, the user will (quickly) define a new cell of that name.
-  */
-  struct objlist *ob, *obnext;
-  struct nlist *tp;
+   /* delete all the contents of cell 'name', and remove 'name' from
+      the cell hash table.  NOTE:  this procedure does not care or check
+      if 'name' has been instanced anywhere.  It is assumed that if this
+      is the case, the user will (quickly) define a new cell of that name.
+   */
+   struct objlist *ob, *obnext;
+   struct nlist *tp;
 
-  tp = LookupCellFile(name, fnum);
-  if (tp == NULL) {
-    Printf ("No cell '%s' found.\n", name);
-    return;
-  }
+   tp = LookupCellFile(name, fnum);
+   if (tp == NULL) {
+      Printf ("No cell '%s' found.\n", name);
+      return;
+   }
 
-  HashIntDelete(name, fnum, &cell_dict);
-  /* now make sure that we free all the fields of the nlist struct */
-  if (tp->name != NULL) FREE(tp->name);
-  HashKill(&(tp->objdict));
-  HashKill(&(tp->instdict));
-  RecurseHashTable(&(tp->propdict), freeprop);
-  HashKill(&(tp->propdict));
-  FreeNodeNames(tp);
-  ob = tp->cell;
-  while (ob != NULL) {
-    obnext = ob->next;
-    FreeObject (ob);
-    ob = obnext;
-  }
+   HashIntDelete(name, fnum, &cell_dict);
+   /* now make sure that we free all the fields of the nlist struct */
+   if (tp->name != NULL) FREE(tp->name);
+   HashKill(&(tp->objdict));
+   HashKill(&(tp->instdict));
+   RecurseHashTable(&(tp->propdict), freeprop);
+   HashKill(&(tp->propdict));
+   FreeNodeNames(tp);
+   ob = tp->cell;
+   while (ob != NULL) {
+      obnext = ob->next;
+      FreeObject (ob);
+      ob = obnext;
+   }
 }
 
 static int PrintCellHashTableElement(struct hashlist *p)
 {
-  struct nlist *ptr;
+   struct nlist *ptr;
 
-  ptr = (struct nlist *)(p->ptr);
-  if ((TopFile >= 0) && (ptr->file != TopFile)) return 1;
+   ptr = (struct nlist *)(p->ptr);
+   if ((TopFile >= 0) && (ptr->file != TopFile)) return 1;
 
-  if (ptr->class != CLASS_SUBCKT) {
-    /* only print primitive cells if Debug is enabled */
-    if (Debug == 1)  Printf("Cell: %s (instanced %d times); Primitive\n",
+   if ((ptr->class != CLASS_SUBCKT) && (ptr->class != CLASS_MODULE)) {
+      /* only print primitive cells if Debug is enabled */
+      if (Debug == 1)  Printf("Cell: %s (instanced %d times); Primitive\n",
 		       ptr->name, ptr->number);
-    else if (Debug == 3) {	/* list */
+      else if (Debug == 3) {	/* list */
 #ifdef TCL_NETGEN
-       Tcl_AppendElement(netgeninterp, ptr->name);
+          Tcl_AppendElement(netgeninterp, ptr->name);
 #else
-       Printf("%s ", ptr->name);
+          Printf("%s ", ptr->name);
 #endif
-    }
-  }
-  else if ((Debug == 2) || (Debug == 3)) {	/* list only */
+      }
+   }
+   else if ((Debug == 2) || (Debug == 3)) {	/* list only */
 #ifdef TCL_NETGEN
-     Tcl_AppendElement(netgeninterp, ptr->name);
+      Tcl_AppendElement(netgeninterp, ptr->name);
 #else
-     Printf("%s ", ptr->name);
+      Printf("%s ", ptr->name);
 #endif
-  }
-  else
-    Printf("Cell: %s (instanced %d times)\n",ptr->name,ptr->number);
-  return(1);
+   }
+   else
+      Printf("Cell: %s (instanced %d times)\n", ptr->name, ptr->number);
+   return(1);
 }
 
 /* Print the contents of the cell hash table.	*/
@@ -663,65 +686,65 @@ static int PrintCellHashTableElement(struct hashlist *p)
 
 void PrintCellHashTable(int full, int filenum)
 {
-  int total, bins;
-  int OldDebug;
+   int total, bins;
+   int OldDebug;
 
-  if ((filenum == -1) && (Circuit1 != NULL) && (Circuit2 != NULL)) {
+   if ((filenum == -1) && (Circuit1 != NULL) && (Circuit2 != NULL)) {
       PrintCellHashTable(full, Circuit1->file);
       PrintCellHashTable(full, Circuit2->file);
       return;
-  }
+   }
 
-  TopFile = filenum;
+   TopFile = filenum;
 
-  bins  = RecurseHashTable(&cell_dict, CountHashTableBinsUsed);
-  total = RecurseHashTable(&cell_dict, CountHashTableEntries);
-  if (full < 2)
-     Printf("Hash table: %d of %d bins used; %d cells total (%.2f per bin)\n",
+   bins  = RecurseHashTable(&cell_dict, CountHashTableBinsUsed);
+   total = RecurseHashTable(&cell_dict, CountHashTableEntries);
+   if (full < 2)
+       Printf("Hash table: %d of %d bins used; %d cells total (%.2f per bin)\n",
 		bins, CELLHASHSIZE, total, (bins == 0) ? 0 :
 		(float)((float)total / (float)bins));
 	
-  OldDebug = Debug;
-  Debug = full;
-  RecurseHashTable(&cell_dict, PrintCellHashTableElement);
-  Debug = OldDebug;
+   OldDebug = Debug;
+   Debug = full;
+   RecurseHashTable(&cell_dict, PrintCellHashTableElement);
+   Debug = OldDebug;
 #ifndef TCL_NETGEN
-  if (full >= 2) Printf("\n");
+   if (full >= 2) Printf("\n");
 #endif
 }
 
 struct nlist *FirstCell(void)
 {
-  return((struct nlist *)HashFirst(&cell_dict));
+   return((struct nlist *)HashFirst(&cell_dict));
 }
 
 struct nlist *NextCell(void)
 {
-  return((struct nlist *)HashNext(&cell_dict));
+   return((struct nlist *)HashNext(&cell_dict));
 }
 
 static int ClearDumpedElement(struct hashlist *np)
 {
-	struct nlist *p;
+   struct nlist *p;
 
-	p = (struct nlist *)(np->ptr);
-	p->dumped = 0;
-	return(1);
+   p = (struct nlist *)(np->ptr);
+   p->dumped = 0;
+   return(1);
 }
 
 void ClearDumpedList(void)
 {
-	RecurseHashTable(&cell_dict, ClearDumpedElement);
+   RecurseHashTable(&cell_dict, ClearDumpedElement);
 }
 
 int RecurseCellHashTable(int (*foo)(struct hashlist *np))
 {
-  return RecurseHashTable(&cell_dict, foo);
+   return RecurseHashTable(&cell_dict, foo);
 }
 
 int RecurseCellFileHashTable(int (*foo)(struct hashlist *, int), int value)
 {
-  return RecurseHashTableValue(&cell_dict, foo, value);
+   return RecurseHashTableValue(&cell_dict, foo, value);
 }
 
 /* Yet another version, passing one parameter that is a pointer */
@@ -729,7 +752,7 @@ int RecurseCellFileHashTable(int (*foo)(struct hashlist *, int), int value)
 struct nlist *RecurseCellHashTable2(struct nlist *(*foo)(struct hashlist *,
 	void *), void *pointer)
 {
-  return RecurseHashTablePointer(&cell_dict, foo, pointer);
+   return RecurseHashTablePointer(&cell_dict, foo, pointer);
 }
 
 /************************** WILD-CARD STUFF *******************************/

base/spice.c

@@ -43,6 +43,7 @@ the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
 #include "print.h"
 #include "query.h"
 #include "objlist.h"
+#include "netcmp.h"
 
 // Global storage for parameters from .PARAM
 struct hashdict spiceparams;
@@ -519,7 +520,7 @@ void ReadSpiceFile(char *fname, int filenum, struct cellstack **CellStackPtr,
   char *eqptr, devtype, in_subckt;
   struct keyvalue *kvlist = NULL;
   char inst[MAX_STR_LEN], model[MAX_STR_LEN], instname[MAX_STR_LEN];
-  struct nlist *tp;
+  struct nlist *tp, *tpsave;
   struct objlist *parent, *sobj, *nobj, *lobj, *pobj;
 
   inst[MAX_STR_LEN-1] = '\0';
@@ -557,6 +558,7 @@ void ReadSpiceFile(char *fname, int filenum, struct cellstack **CellStackPtr,
 
       snprintf(model, MAX_STR_LEN-1, "%s", nexttok);
       tp = LookupCellFile(nexttok, filenum);
+      tpsave = NULL;
 
       /* Check for name conflict with duplicate cell names	*/
       /* This may mean that the cell was used before it was	*/
@@ -595,11 +597,46 @@ void ReadSpiceFile(char *fname, int filenum, struct cellstack **CellStackPtr,
          tp = LookupCellFile(nexttok, filenum);
       }
       else if (tp != NULL) {	/* Make a new definition for an empty cell */
-	 FreePorts(nexttok);
-	 CellDelete(nexttok, filenum);	/* This removes any PLACEHOLDER flag */
-	 CellDef(model, filenum);
-	 tp = LookupCellFile(model, filenum);
-	 update = 1;	/* Will need to update existing instances */
+	 /* Handle issue with SPICE read after verilog, where a placeholder
+	  * was created from the verilog.  (1) If the pin names are "1", "2",
+	  * "3", then this is a SPICE placeholder, and just remove the CellDef
+	  * and re-create it.  Otherwise, create new cell "_PLACEHOLDER_".
+	  * (2) After encountering .ends, run MatchPins between the two cells.
+	  * (3) delete the original cell and rename the new cell.
+	  */
+	 int i = 1;
+	 char pname[10];
+	 for (pobj = tp->cell; pobj && pobj->type == PORT; pobj = pobj->next) {
+	     sprintf(pname, "%d", i);
+	     if (!matchnocase(pobj->name, pname)) break;
+	     i++;
+	 }
+	 if ((pobj == NULL) || (pobj->type != PORT)) {
+	    /* This is a SPICE placeholder created because the cell was instanced
+	     * before it was defined.  However, the pins can be assumed to be in
+	     * the correct order, and pin reordering does not need to be done.
+	     */
+	    FreePorts(nexttok);
+	    CellDelete(nexttok, filenum);	/* This removes any PLACEHOLDER flag */
+	    CellDef(model, filenum);
+	    tp = LookupCellFile(model, filenum);
+	    update = 1;	/* Will need to update existing instances */
+	 }
+	 else {
+	    /* This is (probably) a verilog placeholder created because the
+	     * verilog was read before the (SPICE) definitions.  The verilog
+	     * netlist should have named the pins of the parent cell.  However,
+	     * there is no guarantee the order of pins is correct.  The MatchPins()
+	     * routine from netcmp.c can be used here to match the cell against
+	     * the placeholder, and reorder the pins in all instances to match.
+	     * Note that we cannot just reorder the SPICE pins to match the
+	     * verilog order, because there may be other SPICE netlists which
+	     * instance the cell with the correct SPICE port order.
+	     */
+	     tpsave = tp;
+             CellDef("_PLACEHOLDER_", filenum);
+             tp = LookupCellFile("_PLACEHOLDER_", filenum);
+	 }
       }
       else if (tp == NULL) {	/* Completely new cell, no name conflict */
          CellDef(model, filenum);
@@ -691,6 +728,38 @@ skip_ends:
       if (*CellStackPtr) PopStack(CellStackPtr);
       if (*CellStackPtr) ReopenCellDef((*CellStackPtr)->cellname, filenum);
       SkipNewLine(NULL);
+
+      if (tpsave != NULL) {
+	 struct nlist *tpplace;
+	 char *savename;
+
+	 /* Handle a placeholder from a verilog file that has been replaced
+	  * by a netlist with pins in a different order.  The pins need to
+	  * be matched, corrected in the original cell and all instances,
+	  * and the new cell deleted.
+	  */
+
+	 Printf("Verilog placeholder %s replaced by SPICE definition\n",
+		tpsave->name);
+         tpplace = LookupCellFile("_PLACEHOLDER_", filenum);
+	 /* MatchPins is part of netcmp and normally Circuit2 is the
+	  * circuit being matched, so set Circuit2 to the original
+	  * verilog black-box cell, and MatchPins() will force its
+	  * pins to be rearranged to match the SPICE definition just
+	  * read.
+	  */
+	 Circuit2 = tpsave;
+	 MatchPins(tpplace, tpsave, 0);
+	 savename = strsave(tpsave->name);
+	 /* Now the original verilog black-box cell can be removed */
+	 FreePorts(savename);
+	 CellDelete(savename, filenum);
+	 /* And _PLACEHOLDER_ is renamed to the original name of the cell. */
+	 CellRehash("_PLACEHOLDER_", savename, filenum);
+	 tpsave = NULL;
+	 Circuit2 = NULL;
+	 FREE(savename);
+      }
     }
     else if (matchnocase(nexttok, ".MODEL")) {
       unsigned char class = CLASS_SUBCKT;

base/verilog.c

@@ -57,6 +57,7 @@ the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
 #include "netfile.h"
 #include "print.h"
 #include "hash.h"
+#include "netcmp.h"
 
 // See netfile.c for explanation of delimiters.  'X'
 // separates single-character delimiters from two-character delimiters.
@@ -716,10 +717,12 @@ int GetBus(char *astr, struct bus *wb)
     return 0;
 }
 
+//--------------------------------------------------------------------
 // Output a Verilog Module.  Note that since Verilog does not describe
 // low-level devices like transistors, capacitors, etc., then this
 // format is limited to black-box subcircuits.  Cells containing any
 // such low-level devices are ignored.
+//--------------------------------------------------------------------
 
 void VerilogModule(struct nlist *tp)
 {
@@ -1018,7 +1021,7 @@ void ReadVerilogFile(char *fname, int filenum, struct cellstack **CellStackPtr,
   char *eqptr, *matchptr;
   struct keyvalue *kvlist = NULL;
   char inst[MAX_STR_LEN], model[MAX_STR_LEN], portname[MAX_STR_LEN], pkey[MAX_STR_LEN];
-  struct nlist *tp;
+  struct nlist *tp, *tpsave;
   struct objlist *parent, *sobj, *nobj, *lobj, *pobj, *cref;
 
   inst[MAX_STR_LEN-1] = '\0';
@@ -1152,6 +1155,7 @@ void ReadVerilogFile(char *fname, int filenum, struct cellstack **CellStackPtr,
 
       snprintf(model, MAX_STR_LEN-1, "%s", nexttok);
       tp = LookupCellFile(nexttok, filenum);
+      tpsave = NULL;
       hasports = (char)0;
 
       /* Check for name conflict with duplicate cell names	*/
@@ -1191,35 +1195,9 @@ void ReadVerilogFile(char *fname, int filenum, struct cellstack **CellStackPtr,
          tp = LookupCellFile(nexttok, filenum);
       }
       else if (tp != NULL) {	/* Cell exists, but as a placeholder */
-	 struct nlist *tptmp = NULL;
-	 char ctemp[8];
-	 int n = 0;
-
-	 /* This redefines a placeholder module to an unused temporary cell name */
-         while (1) {
-	    sprintf(ctemp, "%d", n);
-            tptmp = LookupCellFile(ctemp, filenum);
-	    if (tptmp == NULL) break;
-	    n++;
-	 }
-	 CellRehash(nexttok, ctemp, filenum);
-	 tptmp = LookupCellFile(ctemp, filenum);
-
-	 /* Create a new module definition */
-	 CellDef(model, filenum);
-	 tp = LookupCellFile(model, filenum);
-
-	 /* Find an instance of this module in the netlist */
-	 cref = FindInstanceOf(tp);
-	 if ((cref != NULL) && (cref->name != NULL)) {
-	    hasports = (char)1;
-	    /* Copy ports from the original parent cell to the new parent cell */
-	    for (pobj = tptmp->cell; pobj && (pobj->type == PORT); pobj = pobj->next)
-		Port(pobj->name);
-	 }
-	 /* Remove the original cell definition */
-	 FreePorts(ctemp);
-	 CellDelete(ctemp, filenum);	/* This removes any PLACEHOLDER flag */
+	 tpsave = tp;
+	 CellDef("_PLACEHOLDER_", filenum);
+	 tp = LookupCellFile("_PLACEHOLDER_", filenum);
       }
       else if (tp == NULL) {	/* Completely new cell, no name conflict */
          CellDef(model, filenum);
@@ -1428,6 +1406,93 @@ skip_endmodule:
       if (*CellStackPtr) PopStack(CellStackPtr);
       if (*CellStackPtr) ReopenCellDef((*CellStackPtr)->cellname, filenum);
       SkipNewLine(VLOG_DELIMITERS);
+
+      if (tpsave != NULL) {
+	 struct nlist *tpplace;
+	 char *savename;
+	 int lnum, pnum, ltest;
+	 unsigned char valid;
+	 struct objlist *lobj, *pobj;
+
+	 /* Handle a placeholder from a verilog file that has been replaced
+	  * by a netlist with pins in a different order.  The pins need to
+	  * be matched, corrected in the original cell and all instances,
+	  * and the new cell deleted.
+	  */
+
+	 Printf("Verilog placeholder module %s replaced by module definition\n",
+		tpsave->name);
+         tpplace = LookupCellFile("_PLACEHOLDER_", filenum);
+
+	 /* If tpsave was generated from an instance in a SPICE netlist that
+	  * did not have a black-box subcircuit definition, then the pins
+	  * will all be labeled 1, 2, 3, etc.  If so, then assume that the
+	  * verilog pins are in order, and rename the placeholder pins.
+	  * If the number of pins does not match, or if the pins are not
+	  * labeled as ascending integers, then leave the cell alone.
+	  * In either case, output a warning message.
+	  */
+
+	 /* Get the number of ports in the placeholder */
+	 pnum = 0;
+	 for (pobj = tpplace->cell; pobj; pobj = pobj->next) {
+	    if (pobj->type != PORT) break;
+	    pnum++;
+	 }
+
+	 /* Get the number of ports in the saved cell and make	*/
+	 /* sure that it equals the number of ports in the	*/
+	 /* placeholder, and that all of the ports in the saved	*/
+	 /* cell are integers in ascending order.		*/
+
+	 valid = TRUE;
+	 lnum = 0;
+	 for (lobj = tpsave->cell; lobj; lobj = lobj->next) {
+	    if (lobj->type != PORT) break;
+	    lnum++;
+	    if (sscanf(lobj->name, "%d", &ltest) != 1) break;
+	    if (ltest != lnum) break;
+	 }
+	 if ((lobj != NULL) && (lobj->type == PORT))
+	    valid = FALSE;	/* Pins are not integers in ascending order */
+	 if (pnum != lnum) valid = FALSE;	/* Different number of pins */
+
+	 if (valid == TRUE) {
+	    Printf("Replacing pins of placeholder cell %s from cell definition.\n",
+		tpsave->name);
+	    pobj = tpplace->cell;
+	    for (lobj = tpsave->cell; lobj; lobj = lobj->next) {
+		if (lobj->type != PORT) break;
+		if (pobj == NULL) break;	/* should not happen */
+		FREE(lobj->name);
+		lobj->name = (char *)MALLOC(strlen(pobj->name) + 1);
+		strcpy(lobj->name, pobj->name);
+		pobj = pobj->next;
+	    }
+	 }
+	 else {
+	    Printf("Placeholder pins of cell %s are not compatible and"
+		" will be left unchanged\n", tpsave->name);
+	 }
+
+         /* MatchPins is part of netcmp and normally Circuit2 is the
+          * circuit being matched, so set Circuit2 to the original
+          * verilog black-box cell, and MatchPins() will force its
+          * pins to be rearranged to match the module definition just
+          * read.
+          */
+         Circuit2 = tpsave;
+         MatchPins(tpplace, tpsave, 0);
+         savename = strsave(tpsave->name);
+         /* Now the original verilog black-box cell can be removed */
+         FreePorts(savename);
+         CellDelete(savename, filenum);
+         /* And _PLACEHOLDER_ is renamed to the original name of the cell. */
+         CellRehash("_PLACEHOLDER_", savename, filenum);
+         tpsave = NULL;
+         Circuit2 = NULL;
+         FREE(savename);
+      }
     }
 
     else if (match(nexttok, "`include")) {
@@ -1770,8 +1835,9 @@ skip_endmodule:
 	}
 	else {	    /* "assign" */
 	    SkipTokComments(VLOG_PIN_CHECK_DELIMITERS);
-	    if (GetBusTok(&wb) == 0) {
-		char *aptr = strvchr(nexttok, '[');
+	    char *aptr = strvchr(nexttok, '[');
+	    if (((aptr == NULL) && (GetBusTok(&wb) == 0)) ||
+			((aptr != NULL) && (GetBus(aptr, &wb) == 0))) {
 		if (aptr != NULL) {
 		    *aptr = '\0';
 		    /* Find object of first net in bus */
@@ -1789,6 +1855,15 @@ skip_endmodule:
 	    }
 	    else {
 		lhs = LookupObject(nexttok, CurrentCell);
+		/* Handle the case in which an assignment is made
+		 * without first declaring a wire for the signal,
+		 * which is considered valid syntax (patch by
+		 * Sylvain Munaut).
+		 */
+		if (lhs == NULL) {
+		    Node(nexttok);
+		    lhs = LookupObject(nexttok, CurrentCell);
+		}
 		strcpy(noderoot, nexttok);
 	    }
 	    SkipTokComments(VLOG_DELIMITERS);
@@ -1837,8 +1912,9 @@ skip_endmodule:
 		    break;
 		}
 		else {
-		    if (GetBusTok(&wb2) == 0) {
-			char *aptr = strvchr(nexttok, '[');
+		    char *aptr = strvchr(nexttok, '[');
+		    if (((aptr == NULL) && (GetBusTok(&wb2) == 0)) ||
+				((aptr != NULL) && (GetBus(aptr, &wb2) == 0))) {
 			j = wb2.start;
 			if (aptr != NULL) {
 			    *aptr = '\0';
@@ -1898,12 +1974,21 @@ skip_endmodule:
 
 			if (i != -1)
 			    snprintf(nodename, MAX_STR_LEN, "%s[%d]", noderoot, i);
-			else
+			else if (lhs != NULL)
 			    strncpy(nodename, lhs->name, MAX_STR_LEN - 1);
+			else {
+			    Printf("Error:  Improper node name \"%s\".\n", noderoot);
+			    goto skip_endmodule;
+			}
 			if (j != -1)
 			    snprintf(assignname, MAX_STR_LEN, "%s[%d]", assignroot, j);
-			else
+			else if (rhs != NULL)
 			    strncpy(assignname, rhs->name, MAX_STR_LEN - 1);
+			else {
+			    Printf("Error:  Improper assignment name \"%s\".\n",
+					assignroot);
+			    goto skip_endmodule;
+			}
 
 			join(nodename, assignname);
 

scripts/configure

@@ -668,7 +668,6 @@ XMKMF
 HAVE_PYTHON3
 EGREP
 GREP
-M4
 RANLIB
 INSTALL_DATA
 INSTALL_SCRIPT
@@ -3702,56 +3701,6 @@ else
 fi
 
 
-for ac_prog in gm4 gnum4 m4
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_M4+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  case $M4 in
-  [\\/]* | ?:[\\/]*)
-  ac_cv_path_M4="$M4" # Let the user override the test with a path.
-  ;;
-  *)
-  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_path_M4="$as_dir/$ac_word$ac_exec_ext"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-  ;;
-esac
-fi
-M4=$ac_cv_path_M4
-if test -n "$M4"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $M4" >&5
-$as_echo "$M4" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-  test -n "$M4" && break
-done
-test -n "$M4" || M4="no"
-
-if test x$M4 = xno; then
-  as_fn_error $? "M4 is required" "$LINENO" 5
-fi
-
 
 if test "$CPP" = "$CC -E" ; then
    CPP="$CPP -x c"
@@ -6302,7 +6251,7 @@ fi
 
     *darwin*)
       SHDLIB_EXT=".dylib"
-      LDDL_FLAGS="-dynamiclib -flat_namespace -undefined suppress -noprebind"
+      LDDL_FLAGS="-dynamiclib -undefined dynamic_lookup"
       LDFLAGS="${LDFLAGS} ${LIB_SPECS}"
       CFLAGS="${CFLAGS} ${X_CFLAGS} ${INC_SPECS} -I/sw/include -fno-common"
       ;;

scripts/configure.in

@@ -26,12 +26,6 @@ AC_ISC_POSIX
 AC_PROG_INSTALL
 AC_PROG_RANLIB
 
-dnl GNU M4 is preferred due to some of the option switches.
-AC_PATH_PROGS([M4], [gm4 gnum4 m4], [no])
-if test x$M4 = xno; then
-  AC_MSG_ERROR([M4 is required])
-fi
-
 dnl check size of pointer for correct behavior on 64-bit systems
 dnl If the C preprocessor is GCC, we need to force the flag to
 dnl assert that input files are of type C, or else the preprocessing
@@ -1033,7 +1027,7 @@ fi
 
     *darwin*)
       SHDLIB_EXT=".dylib"
-      LDDL_FLAGS="-dynamiclib -flat_namespace -undefined suppress -noprebind"
+      LDDL_FLAGS="-dynamiclib -undefined dynamic_lookup"
       LDFLAGS="${LDFLAGS} ${LIB_SPECS}"
       CFLAGS="${CFLAGS} ${X_CFLAGS} ${INC_SPECS} -I/sw/include -fno-common"
       ;;

tcltk/netgen.tcl.in

@@ -655,6 +655,11 @@ proc netgen::lvs { name1 name2 {setupfile setup.tcl} {logfile comp.out} args} {
 	    }
 	 } elseif {[netgen::print queue] == {} && $result == 0} {
 	    set pinMismatch 1
+	 } else {
+	    # This assumes that proxy pins are added correctly.  Previously,
+	    # that was not trusted, and so an initial pin mismatch would
+	    # always force subcells to be flattened.
+	    set doFlatten 0
 	 }
       }
       if {$doFlatten} {
@@ -741,6 +746,19 @@ set auto_noexec 1       ;# don't EVER call UNIX commands w/o "shell" in front
 # Cross-Application section
 #----------------------------------------------------------------------
 
+# For use with open_pdks, set PDK_ROOT from the environment.  If no
+# such environment variable exists, check some common locations.
+
+if {[catch {set PDK_ROOT $::env(PDK_ROOT)}]} {
+    if {[file isdir /usr/local/share/pdk] == 1} {
+	set PDK_ROOT /usr/local/share/pdk
+    } elseif {[file isdir /usr/share/pdk] == 1} {
+	set PDK_ROOT /usr/share/pdk
+    } elseif {[file isdir /foss/pdk] == 1} {
+	set PDK_ROOT /foss/pdk
+    }
+}
+
 # Setup IRSIM assuming that the Tcl version is installed.
 # We do not need to rename procedure irsim to NULL because it is
 # redefined in a script, which simply overwrites the original.

tcltk/tclnetgen.c

@@ -707,11 +707,11 @@ _netgen_readnet(ClientData clientData,
     Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])
 {
    char *formats[] = {
-      "automatic", "ext", "extflat", "sim", "ntk", "spice",
+      "automatic", "ext", "extflat", "sim", "prm", "ntk", "spice",
       "verilog", "netgen", "actel", "xilinx", NULL
    };
    enum FormatIdx {
-      AUTO_IDX, EXT_IDX, EXTFLAT_IDX, SIM_IDX, NTK_IDX,
+      AUTO_IDX, EXT_IDX, EXTFLAT_IDX, SIM_IDX, PRM_IDX, NTK_IDX,
       SPICE_IDX, VERILOG_IDX, NETGEN_IDX, ACTEL_IDX, XILINX_IDX
    };
    struct nlist *tc;
@@ -807,6 +807,9 @@ _netgen_readnet(ClientData clientData,
          case SIM_IDX:
             retstr = ReadSim(savstr, &filenum);
             break;
+         case PRM_IDX:
+            retstr = ReadPrm(savstr, &filenum);
+            break;
          case NTK_IDX:
             retstr = ReadNtk(savstr, &filenum);
             break;
@@ -1592,8 +1595,7 @@ _netgen_model(ClientData clientData,
       return result;
 
    if (objc == 3) {
-      model = Tcl_GetString(objv[2]);
-      nports = NumberOfPorts(model, fnum);
+      nports = NumberOfPorts(tp->name, fnum);
 
       if (Tcl_GetIndexFromObj(interp, objv[2], (CONST84 char **)modelclasses,
 		"class", 0, &index) != TCL_OK) {
@@ -2510,7 +2512,13 @@ _netcmp_run(ClientData clientData,
 	       if (automorphisms > 0) {
 	          // Next, attempt to resolve automorphisms uniquely by
 	          // using the pin names
-		  automorphisms = ResolveAutomorphsByPin();
+		  automorphisms = ResolveAutomorphsByPin(FALSE);
+	       }
+	       if (automorphisms > 0) {
+	          // Next, attempt to resolve automorphisms uniquely by
+	          // using the net names (should only be done after
+		  // resolving by pin).
+		  automorphisms = ResolveAutomorphsByPin(TRUE);
 	       }
 	       if (automorphisms > 0) {
 	          // Anything left is truly indistinguishable
@@ -2520,8 +2528,16 @@ _netcmp_run(ClientData clientData,
 
 	    if (automorphisms == -1)
 	       Fprintf(stdout, "Netlists do not match.\n");
-	    else if (automorphisms == -2)
-	       Fprintf(stdout, "Netlists match uniquely with port errors.\n");
+	    else if (automorphisms == -2) {
+	       Fprintf(stdout, "Netlists match uniquely with port");
+	       if (PropertyErrorDetected) {
+		  Fprintf(stdout, " and property errors.\n");
+	          PrintPropertyResults(dolist);
+	       }
+	       else {
+		  Fprintf(stdout, " errors.\n");
+	       }
+	    }
 	    else {
 	       if (automorphisms == 0)
 	          Fprintf(stdout, "Netlists match uniquely");
@@ -2649,8 +2665,10 @@ _netcmp_verify(ClientData clientData,
 	 disable_interrupt();
 	 if (index == EQUIV_IDX || index == UNIQUE_IDX)
 	     Tcl_SetObjResult(interp, Tcl_NewBooleanObj(0));
-	 else
+	 else {
 	     Fprintf(stdout, "Netlists do not match.\n");
+	     Fprintf(stdout, "Port matching may fail to disambiguate symmetries.\n");
+	 }
       }
       else if (automorphisms == -2) {
 	 if (index == EQUIV_IDX)

tcltk/tkcon.tcl

@@ -36,7 +36,7 @@ exec ${NETGEN_WISH:=wish} "$0" ${1+"$@"}
 #
 #    set ::tkcon::PRIV(proxy) {wwwproxy:8080 1}
 #
-# Or you can set the above variable from within tkcon by calling 
+# Or you can set the above variable from within tkcon by calling
 #
 #    tkcon master set ::tkcon:PRIV(proxy) wwwproxy:8080
 #
@@ -44,6 +44,8 @@ exec ${NETGEN_WISH:=wish} "$0" ${1+"$@"}
 if {$tcl_version < 8.0} {
     return -code error "tkcon requires at least Tcl/Tk8"
 } else {
+    # Prevent breaking on version 8.5.2
+    # package require -exact Tk $tcl_version
     package require Tk $tcl_version
 }
 
@@ -59,18 +61,6 @@ foreach pkg [info loaded {}] {
 }
 catch {unset pkg file name version}
 
-# Tk 8.4 makes previously exposed stuff private.
-# FIX: Update tkcon to not rely on the private Tk code.
-#
-if {![llength [info globals tkPriv]]} {
-    ::tk::unsupported::ExposePrivateVariable tkPriv
-}
-foreach cmd {SetCursor UpDownLine Transpose ScrollPages} {
-    if {![llength [info commands tkText$cmd]]} {
-        ::tk::unsupported::ExposePrivateCommand tkText$cmd
-    }
-}
-
 # Initialize the ::tkcon namespace
 #
 namespace eval ::tkcon {
@@ -196,7 +186,7 @@ proc ::tkcon::Init {} {
 	    tkcon_puts tkcon_gets observe observe_var unalias which what
 	}
 	version		2.3
-	RCS		{RCS: @(#) $Id: tkcon.tcl,v 1.2 2008/05/23 00:20:17 tim Exp $}
+	RCS		{RCS: @(#) $Id: tkcon.tcl,v 1.2 2008/04/18 16:28:13 tim Exp $}
 	HEADURL		{http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/tkcon/tkcon/tkcon.tcl?rev=HEAD}
 	docs		"http://tkcon.sourceforge.net/"
 	email		{jeff@hobbs.org}
@@ -654,7 +644,7 @@ proc ::tkcon::GarbageCollect {} {
 ## ::tkcon::EvalCmd) in turn.  Any uncompleted command will not be eval'ed.
 # ARGS:	w	- console text widget
 # Calls:	::tkcon::CmdGet, ::tkcon::CmdSep, ::tkcon::EvalCmd
-## 
+##
 proc ::tkcon::Eval {w} {
     set incomplete [CmdSep [CmdGet $w] cmds last]
     $w mark set insert end-1c
@@ -674,7 +664,7 @@ proc ::tkcon::Eval {w} {
 # Calls:	::tkcon::Prompt
 # Outputs:	result of command to stdout (or stderr if error occured)
 # Returns:	next event number
-## 
+##
 proc ::tkcon::EvalCmd {w cmd} {
     variable OPT
     variable PRIV
@@ -745,7 +735,7 @@ proc ::tkcon::EvalCmd {w cmd} {
 		    $w tag bind $tag <Leave> \
 			    [list $w tag configure $tag -underline 0]
 		    $w tag bind $tag <ButtonRelease-1> \
-			    "if {!\[info exists tkPriv(mouseMoved)\] || !\$tkPriv(mouseMoved)} \
+			    "if {!\[info exists ::tk::Priv(mouseMoved)\] || !\$::tk::Priv(mouseMoved)} \
 			    {[list edit -attach [Attach] -type error -- $PRIV(errorInfo)]}"
 		} else {
 		    $w insert output $res\n stderr
@@ -905,7 +895,7 @@ proc ::tkcon::EvalSocketClosed {} {
 ## ::tkcon::EvalNamespace - evaluates the args in a particular namespace
 ## This is an override for ::tkcon::EvalAttached for when the user wants
 ## to attach to a particular namespace of the attached interp
-# ARGS:	attached	
+# ARGS:	attached
 #	namespace	the namespace to evaluate in
 #	args		the args to evaluate
 # RETURNS:	the result of the command
@@ -933,7 +923,7 @@ proc ::tkcon::Namespaces {{ns ::} {l {}}} {
 ## ::tkcon::CmdGet - gets the current command from the console widget
 # ARGS:	w	- console text widget
 # Returns:	text which compromises current command line
-## 
+##
 proc ::tkcon::CmdGet w {
     if {![llength [$w tag nextrange prompt limit end]]} {
 	$w tag add stdin limit end-1c
@@ -947,7 +937,7 @@ proc ::tkcon::CmdGet w {
 #	last	- varname of any remainder (like an incomplete final command).
 #		If there is only one command, it's placed in this var.
 # Returns:	constituent command info in varnames specified by list & rmd.
-## 
+##
 proc ::tkcon::CmdSep {cmd list last} {
     upvar 1 $list cmds $last inc
     set inc {}
@@ -974,7 +964,7 @@ proc ::tkcon::CmdSep {cmd list last} {
 ## ::tkcon::CmdSplit - splits multiple commands into a list
 # ARGS:	cmd	- (possible) multiple command to separate
 # Returns:	constituent commands in a list
-## 
+##
 proc ::tkcon::CmdSplit {cmd} {
     set inc {}
     set cmds {}
@@ -998,7 +988,7 @@ proc ::tkcon::CmdSplit {cmd} {
 ## Called by ::tkcon::EvalCmd
 # ARGS:	w	- text widget
 # Outputs:	tag name guaranteed unique in the widget
-## 
+##
 proc ::tkcon::UniqueTag {w} {
     set tags [$w tag names]
     set idx 0
@@ -1011,7 +1001,7 @@ proc ::tkcon::UniqueTag {w} {
 # ARGS:	w	- console text widget
 #	size	- # of lines to constrain to
 # Outputs:	may delete data in console widget
-## 
+##
 proc ::tkcon::ConstrainBuffer {w size} {
     if {[$w index end] > $size} {
 	$w delete 1.0 [expr {int([$w index end])-$size}].0
@@ -1021,7 +1011,7 @@ proc ::tkcon::ConstrainBuffer {w size} {
 ## ::tkcon::Prompt - displays the prompt in the console widget
 # ARGS:	w	- console text widget
 # Outputs:	prompt (specified in ::tkcon::OPT(prompt1)) to console
-## 
+##
 proc ::tkcon::Prompt {{pre {}} {post {}} {prompt {}}} {
     variable OPT
     variable PRIV
@@ -1053,7 +1043,7 @@ proc ::tkcon::Prompt {{pre {}} {post {}} {prompt {}}} {
 }
 
 ## ::tkcon::About - gives about info for tkcon
-## 
+##
 proc ::tkcon::About {} {
     variable OPT
     variable PRIV
@@ -1088,7 +1078,7 @@ proc ::tkcon::About {} {
 
 ## ::tkcon::InitMenus - inits the menubar and popup for the console
 # ARGS:	w	- console text widget
-## 
+##
 proc ::tkcon::InitMenus {w title} {
     variable OPT
     variable PRIV
@@ -1521,7 +1511,7 @@ proc ::tkcon::NamespaceMenu m {
     }
 }
 
-## Namepaces List 
+## Namepaces List
 ##
 proc ::tkcon::NamespacesList {names} {
     variable PRIV
@@ -1894,7 +1884,7 @@ proc ::tkcon::NewSocket {} {
 ## The file is actually sourced in the currently attached's interp
 # ARGS:	fn	- (optional) filename to source in
 # Returns:	selected filename ({} if nothing was selected)
-## 
+##
 proc ::tkcon::Load { {fn ""} } {
     set types {
 	{{Tcl Files}	{.tcl .tk}}
@@ -1913,7 +1903,7 @@ proc ::tkcon::Load { {fn ""} } {
 ## This does not eval in a slave because it's not necessary
 # ARGS:	w	- console text widget
 # 	fn	- (optional) filename to save to
-## 
+##
 proc ::tkcon::Save { {fn ""} {type ""} {opt ""} {mode w} } {
     variable PRIV
 
@@ -1983,7 +1973,7 @@ proc ::tkcon::MainInit {} {
     ## Creates a slave interpreter and sources in this script.
     ## All other interpreters also get a command to eval function in the
     ## new interpreter.
-    ## 
+    ##
     proc ::tkcon::New {} {
 	variable PRIV
 	global argv0 argc argv
@@ -2020,7 +2010,7 @@ proc ::tkcon::MainInit {} {
     ## ::tkcon::Exit - full exit OR destroy slave console
     ## This proc should only be called in the main interpreter from a slave.
     ## The master determines whether we do a full exit or just kill the slave.
-    ## 
+    ##
     proc ::tkcon::Exit {slave args} {
 	variable PRIV
 	variable OPT
@@ -2043,7 +2033,7 @@ proc ::tkcon::MainInit {} {
     ## This proc should only be called by the main interpreter.  If it is
     ## called from there, it will ask before exiting tkcon.  All others
     ## (slaves) will just have their slave interpreter deleted, closing them.
-    ## 
+    ##
     proc ::tkcon::Destroy {{slave {}}} {
 	variable PRIV
 
@@ -2474,7 +2464,7 @@ proc ::tkcon::ErrorHighlight w {
 	    $w tag configure $tag -foreground $COLOR(stdout)
 	    $w tag bind $tag <Enter> [list $w tag configure $tag -underline 1]
 	    $w tag bind $tag <Leave> [list $w tag configure $tag -underline 0]
-	    $w tag bind $tag <ButtonRelease-1> "if {!\$tkPriv(mouseMoved)} \
+	    $w tag bind $tag <ButtonRelease-1> "if {!\$::tk::Priv(mouseMoved)} \
 		    {[list edit -attach $app -type proc -find $what -- $cmd]}"
 	}
 	set info [string range $info $c1 end]
@@ -2503,7 +2493,7 @@ proc ::tkcon::ErrorHighlight w {
 	    $w tag configure $tag -foreground $COLOR(proc)
 	    $w tag bind $tag <Enter> [list $w tag configure $tag -underline 1]
 	    $w tag bind $tag <Leave> [list $w tag configure $tag -underline 0]
-	    $w tag bind $tag <ButtonRelease-1> "if {!\$tkPriv(mouseMoved)} \
+	    $w tag bind $tag <ButtonRelease-1> "if {!\$::tk::Priv(mouseMoved)} \
 		    {[list edit -attach $app -type proc -- $cmd]}"
 	}
     }
@@ -2513,7 +2503,7 @@ proc ::tkcon::ErrorHighlight w {
 ## This always exists in the main interpreter, and is aliased into
 ## other connected interpreters
 # ARGS:	totally variable, see internal comments
-## 
+##
 proc tkcon {cmd args} {
     global errorInfo
 
@@ -2552,8 +2542,8 @@ proc tkcon {cmd args} {
 	    ## 'congets' a replacement for [gets stdin]
 	    # Use the 'gets' alias of 'tkcon_gets' command instead of
 	    # calling the *get* methods directly for best compatability
-	    if {[llength $args]} {
-		return -code error "wrong # args: must be \"tkcon congets\""
+	    if {[llength $args] > 1} {
+		return -code error "wrong # args: must be \"tkcon congets [pfix]\""
 	    }
 	    tkcon show
 	    set old [bind TkConsole <<TkCon_Eval>>]
@@ -2561,7 +2551,12 @@ proc tkcon {cmd args} {
 	    set w $::tkcon::PRIV(console)
 	    # Make sure to move the limit to get the right data
 	    $w mark set insert end
-	    $w mark set limit insert
+	    if {[llength $args]} {
+		$w mark set limit insert
+		$w insert end $args
+	    } else {
+	        $w mark set limit insert
+	    }
 	    $w see end
 	    vwait ::tkcon::PRIV(wait)
 	    set line [::tkcon::CmdGet $w]
@@ -2790,21 +2785,27 @@ proc tkcon {cmd args} {
 ## This allows me to capture all stdout/stderr to the console window
 ## This will be renamed to 'puts' at the appropriate time during init
 ##
-# ARGS:	same as usual	
+# ARGS:	same as usual
 # Outputs:	the string with a color-coded text tag
-## 
+##
 proc tkcon_puts args {
     set len [llength $args]
     foreach {arg1 arg2 arg3} $args { break }
 
     if {$len == 1} {
-	tkcon console insert output "$arg1\n" stdout
+	set sarg $arg1
+	set nl   1
+	set farg stdout
     } elseif {$len == 2} {
 	if {![string compare $arg1 -nonewline]} {
-	    tkcon console insert output $arg2 stdout
+	    set sarg $arg2
+	    set farg stdout
+	    set nl 0
 	} elseif {![string compare $arg1 stdout] \
 		|| ![string compare $arg1 stderr]} {
-	    tkcon console insert output "$arg2\n" $arg1
+	    set sarg $arg2
+	    set farg $arg1
+	    set nl 1
 	} else {
 	    set len 0
 	}
@@ -2812,11 +2813,15 @@ proc tkcon_puts args {
 	if {![string compare $arg1 -nonewline] \
 		&& (![string compare $arg2 stdout] \
 		|| ![string compare $arg2 stderr])} {
-	    tkcon console insert output $arg3 $arg2
+	    set sarg $arg3
+	    set farg $arg2
+	    set nl 0
 	} elseif {(![string compare $arg1 stdout] \
 		|| ![string compare $arg1 stderr]) \
 		&& ![string compare $arg3 nonewline]} {
-	    tkcon console insert output $arg2 $arg1
+	    set sarg $arg2
+	    set farg $arg1
+	    set nl 0
 	} else {
 	    set len 0
 	}
@@ -2826,7 +2831,42 @@ proc tkcon_puts args {
 
     ## $len == 0 means it wasn't handled by tkcon above.
     ##
-    if {$len == 0} {
+
+    if {$len != 0} {
+
+	## "poor man's" \r substitution---erase everything on the output
+	## line and print from character after the \r
+
+	set rpt [string last \r $sarg]
+	if {$rpt >= 0} {
+	    tkcon console delete "insert linestart" "insert lineend"
+	    set sarg [string range $sarg [expr {$rpt + 1}] end]
+	}
+
+	set bpt [string first \b $sarg]
+	if {$bpt >= 0} {
+	    set narg [string range $sarg [expr {$bpt + 1}] end]
+	    set sarg [string range $sarg 0 [expr {$bpt - 1}]]
+	    set nl 0
+	}
+
+
+	if {$nl == 0} {
+	    tkcon console insert output $sarg $farg
+	} else {
+	    tkcon console insert output "$sarg\n" $farg
+	}
+
+	if {$bpt >= 0} {
+	    tkcon console delete "insert -1 char" insert
+	    if {$nl == 0} {
+		tkcon_puts $farg $narg nonewline
+	    } else {
+		tkcon_puts $farg $narg
+	    }
+	}
+
+    } else {
 	global errorCode errorInfo
 	if {[catch "tkcon_tcl_puts $args" msg]} {
 	    regsub tkcon_tcl_puts $msg puts msg
@@ -2849,7 +2889,7 @@ proc tkcon_puts args {
 ## This allows me to capture all stdin input without needing to stdin
 ## This will be renamed to 'gets' at the appropriate time during init
 ##
-# ARGS:		same as gets	
+# ARGS:		same as gets
 # Outputs:	same as gets
 ##
 proc tkcon_gets args {
@@ -2873,12 +2913,12 @@ proc tkcon_gets args {
 }
 
 ## edit - opens a file/proc/var for reading/editing
-## 
+##
 # Arguments:
 #   type	proc/file/var
 #   what	the actual name of the item
 # Returns:	nothing
-## 
+##
 proc edit {args} {
     array set opts {-find {} -type {} -attach {}}
     while {[string match -* [lindex $args 0]]} {
@@ -3030,7 +3070,7 @@ proc echo args { puts [concat $args] }
 
 ## clear - clears the buffer of the console (not the history though)
 ## This is executed in the parent interpreter
-## 
+##
 proc clear {{pcnt 100}} {
     if {![regexp {^[0-9]*$} $pcnt] || $pcnt < 1 || $pcnt > 100} {
 	return -code error \
@@ -3048,7 +3088,7 @@ proc clear {{pcnt 100}} {
 ## If called with one arg, returns the alias of that arg (or {} if none)
 # ARGS:	newcmd	- (optional) command to bind alias to
 # 	args	- command and args being aliased
-## 
+##
 proc alias {{newcmd {}} args} {
     if {[string match {} $newcmd]} {
 	set res {}
@@ -3065,7 +3105,7 @@ proc alias {{newcmd {}} args} {
 
 ## unalias - unaliases an alias'ed command
 # ARGS:	cmd	- command to unbind as an alias
-## 
+##
 proc unalias {cmd} {
     interp alias {} $cmd {}
 }
@@ -3085,7 +3125,7 @@ proc unalias {cmd} {
 #	--	forcibly ends options recognition
 #
 # Returns:	the values of the requested items in a 'source'able form
-## 
+##
 proc dump {type args} {
     set whine 1
     set code  ok
@@ -3637,13 +3677,13 @@ proc observe_var {name el op} {
 ## which - tells you where a command is found
 # ARGS:	cmd	- command name
 # Returns:	where command is found (internal / external / unknown)
-## 
+##
 proc which cmd {
     ## This tries to auto-load a command if not recognized
     set types [uplevel 1 [list what $cmd 1]]
     if {[llength $types]} {
 	set out {}
-	
+
 	foreach type $types {
 	    switch -- $type {
 		alias		{ set res "$cmd: aliased to [alias $cmd]" }
@@ -3674,7 +3714,7 @@ proc which cmd {
 ## what - tells you what a string is recognized as
 # ARGS:	str	- string to id
 # Returns:	id types of command as list
-## 
+##
 proc what {str {autoload 0}} {
     set types {}
     if {[llength [info commands $str]] || ($autoload && \
@@ -3721,7 +3761,7 @@ proc what {str {autoload 0}} {
 #	-long	- list in full format "permissions size date filename"
 #	-full	- displays / after directories and link paths for links
 # Returns:	a directory listing
-## 
+##
 proc dir {args} {
     array set s {
 	all 0 full 0 long 0
@@ -4106,7 +4146,7 @@ proc ::tkcon::Bindings {} {
     global tcl_platform tk_version
 
     #-----------------------------------------------------------------------
-    # Elements of tkPriv that are used in this file:
+    # Elements of ::tk::Priv that are used in this file:
     #
     # char -		Character position on the line;  kept in order
     #			to allow moving up or down past short lines while
@@ -4131,9 +4171,12 @@ proc ::tkcon::Bindings {} {
     }
 
     ## Get all Text bindings into TkConsole
-    foreach ev [bind Text] { bind TkConsole $ev [bind Text $ev] }	
+    foreach ev [bind Text] { bind TkConsole $ev [bind Text $ev] }
     ## We really didn't want the newline insertion
     bind TkConsole <Control-Key-o> {}
+
+    ## in 8.6b3, the virtual events <<NextLine>> and <<PrevLine>>
+    #  mess up our history feature
     bind TkConsole <<NextLine>> {}
     bind TkConsole <<PrevLine>> {}
 
@@ -4342,9 +4385,9 @@ proc ::tkcon::Bindings {} {
 
     bind TkConsole <Control-a> {
 	if {[%W compare {limit linestart} == {insert linestart}]} {
-	    tkTextSetCursor %W limit
+	    ::tk::TextSetCursor %W limit
 	} else {
-	    tkTextSetCursor %W {insert linestart}
+	    ::tk::TextSetCursor %W {insert linestart}
 	}
     }
     bind TkConsole <Key-Home> [bind TkConsole <Control-a>]
@@ -4368,14 +4411,14 @@ proc ::tkcon::Bindings {} {
     }
     bind TkConsole <<TkCon_Previous>> {
 	if {[%W compare {insert linestart} != {limit linestart}]} {
-	    tkTextSetCursor %W [tkTextUpDownLine %W -1]
+	    ::tk::TextSetCursor %W [::tk::TextUpDownLine %W -1]
 	} else {
 	    ::tkcon::Event -1
 	}
     }
     bind TkConsole <<TkCon_Next>> {
 	if {[%W compare {insert linestart} != {end-1c linestart}]} {
-	    tkTextSetCursor %W [tkTextUpDownLine %W 1]
+	    ::tk::TextSetCursor %W [::tk::TextUpDownLine %W 1]
 	} else {
 	    ::tkcon::Event 1
 	}
@@ -4390,7 +4433,7 @@ proc ::tkcon::Bindings {} {
     }
     bind TkConsole <<TkCon_Transpose>>	{
 	## Transpose current and previous chars
-	if {[%W compare insert > "limit+1c"]} { tkTextTranspose %W }
+	if {[%W compare insert > "limit+1c"]} { ::tk::TextTranspose %W }
     }
     bind TkConsole <<TkCon_ClearLine>> {
 	## Clear command line (Unix shell staple)
@@ -4408,10 +4451,10 @@ proc ::tkcon::Bindings {} {
 	::tkcon::Insert %W $::tkcon::PRIV(tmp)
 	%W see end
     }
-    catch {bind TkConsole <Key-Page_Up>   { tkTextScrollPages %W -1 }}
-    catch {bind TkConsole <Key-Prior>     { tkTextScrollPages %W -1 }}
-    catch {bind TkConsole <Key-Page_Down> { tkTextScrollPages %W 1 }}
-    catch {bind TkConsole <Key-Next>      { tkTextScrollPages %W 1 }}
+    catch {bind TkConsole <Key-Page_Up>   { ::tk::TextScrollPages %W -1 }}
+    catch {bind TkConsole <Key-Prior>     { ::tk::TextScrollPages %W -1 }}
+    catch {bind TkConsole <Key-Page_Down> { ::tk::TextScrollPages %W 1 }}
+    catch {bind TkConsole <Key-Next>      { ::tk::TextScrollPages %W 1 }}
     bind TkConsole <$PRIV(meta)-d> {
 	if {[%W compare insert >= limit]} {
 	    %W delete insert {insert wordend}
@@ -4429,7 +4472,7 @@ proc ::tkcon::Bindings {} {
     }
     bind TkConsole <ButtonRelease-2> {
 	if {
-	    (!$tkPriv(mouseMoved) || $tk_strictMotif) &&
+	    (!$::tk::Priv(mouseMoved) || $tk_strictMotif) &&
 	    ![catch {::tkcon::GetSelection %W} ::tkcon::PRIV(tmp)]
 	} {
 	    if {[%W compare @%x,%y < limit]} {
@@ -4600,7 +4643,7 @@ proc ::tkcon::TagProc w {
 # 	c1	- first char of pair
 # 	c2	- second char of pair
 # Calls:	::tkcon::Blink
-## 
+##
 proc ::tkcon::MatchPair {w c1 c2 {lim 1.0}} {
     if {[string compare {} [set ix [$w search -back $c1 insert $lim]]]} {
 	while {
@@ -4638,7 +4681,7 @@ proc ::tkcon::MatchPair {w c1 c2 {lim 1.0}} {
 ## The quote to match is assumed to be at the text index 'insert'.
 # ARGS:	w	- console text widget
 # Calls:	::tkcon::Blink
-## 
+##
 proc ::tkcon::MatchQuote {w {lim 1.0}} {
     set i insert-1c
     set j 0
@@ -4664,7 +4707,7 @@ proc ::tkcon::MatchQuote {w {lim 1.0}} {
 # 	i2	- end index of blink region
 # 	dur	- duration in usecs to blink for
 # Outputs:	blinks selected characters in $w
-## 
+##
 proc ::tkcon::Blink {w args} {
     eval [list $w tag add blink] $args
     after $::tkcon::OPT(blinktime) [list $w] tag remove blink $args
@@ -4679,7 +4722,7 @@ proc ::tkcon::Blink {w args} {
 # ARGS:	w	- text window in which to insert the string
 # 	s	- string to insert (usually just a single char)
 # Outputs:	$s to text widget
-## 
+##
 proc ::tkcon::Insert {w s} {
     if {[string match {} $s] || [string match disabled [$w cget -state]]} {
 	return
@@ -4695,7 +4738,7 @@ proc ::tkcon::Insert {w s} {
     $w see insert
 }
 
-## ::tkcon::Expand - 
+## ::tkcon::Expand -
 # ARGS:	w	- text widget in which to expand str
 # 	type	- type of expansion (path / proc / variable)
 # Calls:	::tkcon::Expand(Pathname|Procname|Variable)
@@ -4704,7 +4747,7 @@ proc ::tkcon::Insert {w s} {
 #		match equaled the string to expand, then all possible matches
 #		are output to stdout.  Triggers bell if no matches are found.
 # Returns:	number of matches found
-## 
+##
 proc ::tkcon::Expand {w {type ""}} {
     set exp "\[^\\\\\]\[\[ \t\n\r\\\{\"$\]"
     set tmp [$w search -backwards -regexp $exp insert-1c limit-1c]
@@ -4743,7 +4786,7 @@ proc ::tkcon::Expand {w {type ""}} {
 # Calls:	::tkcon::ExpandBestMatch
 # Returns:	list containing longest unique match followed by all the
 #		possible further matches
-## 
+##
 proc ::tkcon::ExpandPathname str {
     set pwd [EvalAttached pwd]
     # Cause a string like {C:/Program\ Files/} to become "C:/Program Files/"
@@ -4825,7 +4868,7 @@ proc ::tkcon::ExpandProcname str {
 # Calls:	::tkcon::ExpandBestMatch
 # Returns:	list containing longest unique match followed by all the
 #		possible further matches
-## 
+##
 proc ::tkcon::ExpandVariable str {
     if {[regexp {([^\(]*)\((.*)} $str junk ary str]} {
 	## Looks like they're trying to expand an array.
@@ -4853,7 +4896,7 @@ proc ::tkcon::ExpandVariable str {
 ## or $e is {}.  $e is extra for compatibility with proc below.
 # ARGS:	l	- list to find best unique match in
 # Returns:	longest unique match in the list
-## 
+##
 proc ::tkcon::ExpandBestMatch2 {l {e {}}} {
     set s [lindex $l 0]
     if {[llength $l]>1} {
@@ -4873,7 +4916,7 @@ proc ::tkcon::ExpandBestMatch2 {l {e {}}} {
 # ARGS:	l	- list to find best unique match in
 # 	e	- currently best known unique match
 # Returns:	longest unique match in the list
-## 
+##
 proc ::tkcon::ExpandBestMatch {l {e {}}} {
     set ec [lindex $l 0]
     if {[llength $l]>1} {
@@ -5237,7 +5280,7 @@ proc ::tkcon::Retrieve {} {
 ## ::tkcon::Resource - re'source's this script into current console
 ## Meant primarily for my development of this program.  It follows
 ## links until the ultimate source is found.
-## 
+##
 set ::tkcon::PRIV(SCRIPT) [info script]
 if {!$::tkcon::PRIV(WWW) && [string compare $::tkcon::PRIV(SCRIPT) {}]} {
     # we use a catch here because some wrap apps choke on 'file type'