Merge branch 'master' into netgen-1.5

was checked using "subcktname" before its initialization.  Added
a check for a subcircuit called inside itself, which causes an
immediate failure (see issue tracker issue #106).  If allowed to
continue, netgen will either crash or produce inscrutable output
that doesn't pinpoint the issue.

VERSION

@@ -1 +1 @@
-1.5.307
+1.5.321

base/actel.c

@@ -91,7 +91,7 @@ char	*ActelName(char *Name)
   /* strip physical-pin information, if it exists */
   if ((nm = strrchr(name,PHYSICALPIN[0])) != NULL) *nm = '\0';
   if (strlen(name) > 13) {
-    ActelIndex = (++ActelIndex) % ACTELNAMESIZE;
+    ActelIndex = (ActelIndex + 1) % ACTELNAMESIZE;
     /* format the value of the hashed value of the string */
     sprintf(ActelNames[ActelIndex], "$%lX", ActelNameHash(name));
 if (Debug) 
@@ -102,7 +102,7 @@ Printf("ActelNameHash returns %s on name %s\n",ActelNames[ActelIndex], name);
   NeedsQuoting = 0;
   if (NULL != strpbrk(name, ".,:; \t\"'\n\r")) NeedsQuoting = 1;
 
-  ActelIndex = (++ActelIndex) % ACTELNAMESIZE;
+  ActelIndex = (ActelIndex + 1) % ACTELNAMESIZE;
   if (!NeedsQuoting) {
     strcpy(ActelNames[ActelIndex], name);
     return(ActelNames[ActelIndex]);

base/flatten.c

@@ -300,8 +300,6 @@ int flattenInstancesOf(char *name, int fnum, char *instance)
       return 0;
     }
   }
-  /* Placeholder cells must not be flattened */
-  if (ThisCell->flags & CELL_PLACEHOLDER) return 0;
 
   FreeNodeNames(ThisCell);
 
@@ -339,6 +337,10 @@ int flattenInstancesOf(char *name, int fnum, char *instance)
 	   LastObj = ParentParams;
 	   continue;
       }
+      if (ChildCell->flags & CELL_PLACEHOLDER) {
+	   LastObj = ParentParams;
+	   continue;	// Placeholder cells must not be flattened
+      }
       if (ChildCell == ThisCell) {
 	   LastObj = ParentParams;
 	   continue;	// Avoid infinite loop
@@ -1753,8 +1755,8 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 		    Fprintf(stdout, "Flattening instances of %s in cell %s (%d)"
 				" makes a better match\n", ecomp->cell1->name,
 				name1, file1);
-		    flattenInstancesOf(name1, file1, ecomp->cell1->name); 
-		    modified1++;
+		    if (flattenInstancesOf(name1, file1, ecomp->cell1->name) > 0)
+			modified1++;
 		}
 		else if (ecomp->cell1 && (ecomp->num1 > 0)) {
 		    Fprintf(stdout, "Flattening instances of %s in cell %s (%d)"
@@ -1766,8 +1768,8 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 		    Fprintf(stdout, "Flattening instances of %s in cell %s (%d)"
 				" makes a better match\n", ecomp->cell2->name,
 				name2, file2);
-		    flattenInstancesOf(name2, file2, ecomp->cell2->name); 
-		    modified2++;
+		    if (flattenInstancesOf(name2, file2, ecomp->cell2->name) > 0)
+			modified2++;
 		}
 		else if (ecomp->cell2 && (ecomp->num2 > 0)) {
 		    Fprintf(stdout, "Flattening instances of %s in cell %s (%d)"
@@ -1861,8 +1863,8 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 		    	Fprintf(stdout, "Flattening instances of %s in cell %s (%d)"
 				" makes a better match\n", ecomp->cell2->name,
 				name2, file2);
-		    	flattenInstancesOf(name2, file2, ecomp->cell2->name); 
-		    	modified2++;
+		    	if (flattenInstancesOf(name2, file2, ecomp->cell2->name) > 0)
+			    modified2++;
 		    }
 		    else if (ecomp->cell2) {
 			Fprintf(stdout, "Flattening instances of %s in cell %s (%d)"
@@ -1932,8 +1934,8 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 		    	Fprintf(stdout, "Flattening instances of %s in cell %s (%d)"
 				" makes a better match\n", ecomp->cell1->name,
 				name1, file1);
-		    	flattenInstancesOf(name1, file1, ecomp->cell1->name); 
-		        modified1++;
+		    	if (flattenInstancesOf(name1, file1, ecomp->cell1->name) > 0)
+			    modified1++;
 		    }
 		    else if (ecomp->cell1) {
 			Fprintf(stdout, "Flattening instances of %s in cell %s (%d)"
@@ -2016,8 +2018,11 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 						    break;
 					    }
 					}
+					if (found) break;
+				    }
 
-					/* Do NOT remove shorting devices that	*/
+				    if (found) {
+					/* Beware remove shorting devices that	*/
 					/* connect two ports.  Otherwise the	*/
 					/* port lists get screwed up.  It is	*/
 					/* better in that case to force the	*/
@@ -2025,6 +2030,10 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 					/* This is ignored for a top-level cell	*/
 					/* because it will just show up as a	*/
 					/* port mismatch error as it should.	*/
+					/* (12/12/2025---disabling this worked;	*/
+					/* may need to go back to a failing	*/
+					/* example and determine how pin	*/
+					/* matching gets scrambled.)		*/
 
 					if ((not_top == TRUE) &&
 						(ecomp->cell1->class != CLASS_ISOURCE)) {
@@ -2037,14 +2046,18 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 						else if (ob2->node == node2)
 						    found2 = TRUE;
 						if (found1 && found2) {
-						    found = FALSE;
+						    Fprintf(stdout, "Warning: "
+							"zero-valued device connects "
+							"port %s to another port;  pin "
+							"matching may be affected.\n",
+							ob2->name);
+						    // found = FALSE;
 						    break;
 						}
 					    }
 					}
-
-					if (found) break;
 				    }
+
 				    if (found) {
 					Fprintf(stdout, "Removing zero-valued device "
 						"%s from cell %s (%d) makes a better "
@@ -2295,11 +2308,12 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 				    Fprintf(stdout, "Flattening instances of %s in cell"
 						" %s (%d) makes a better match\n",
 						ecompX0->cell1->name, name1, file1);
-				    flattenInstancesOf(name1, file1,
-						ecompX0->cell1->name); 
-				    ecompX0->num1 = 0;
-				    ecomp0X->num1 += ecompX0->num1;
-				    modified1++;
+				    if (flattenInstancesOf(name1, file1,
+						ecompX0->cell1->name) > 0) {
+					ecompX0->num1 = 0;
+					ecomp0X->num1 += ecompX0->num1;
+					modified1++;
+				    }
 				}
 				else
 				{
@@ -2331,11 +2345,12 @@ PrematchLists(char *name1, int file1, char *name2, int file2)
 				    Fprintf(stdout, "Flattening instances of %s in cell"
 						" %s (%d) makes a better match\n",
 						ecomp0X->cell2->name, name2, file2);
-				    flattenInstancesOf(name2, file2,
-						ecomp0X->cell2->name); 
-				    ecomp0X->num2 = 0;
-				    ecompX0->num2 += ecomp0X->num2;
-				    modified2++;
+				    if (flattenInstancesOf(name2, file2,
+						ecomp0X->cell2->name) > 0) {
+					ecomp0X->num2 = 0;
+					ecompX0->num2 += ecomp0X->num2;
+					modified2++;
+				    }
 				}
 				else {
 				    Fprintf(stdout, "Flattening instances of %s in "

base/hash.c

@@ -137,32 +137,39 @@ static unsigned char uppercase[] = {
 // horrible things can happen, as, for example, names AOI12 and OAI12
 // have exactly the same hash result.  Lousy for binning and even
 // lousier for generating class magic numbers.
+//
+// Updated again 4/2/2026 to the FNV-1a hash, which is better than
+// SDBM for this application, according to ChatGPT.
 
 unsigned long hashnocase(char *s, int hashsize)
 {
-	unsigned long hashval;
-	
-	for (hashval = 0; *s != '\0'; )
-	    hashval = uppercase[*s++]
-			+ (hashval << 6) + (hashval << 16) - hashval;
+	unsigned long hashval = 2166136261ul;
+	for (; *s != '\0'; s++) {
+	    hashval ^= uppercase[*s];
+	    hashval *= 16777619ul;
+	}
 	return (hashsize == 0) ? hashval : (hashval % hashsize);
 }
 
 unsigned long hashcase(char *s, int hashsize)
 {
-	unsigned long hashval;
-	
-	for (hashval = 0; *s != '\0'; )
-	    hashval = (*s++) + (hashval << 6) + (hashval << 16) - hashval;
+	unsigned long hashval = 2166136261ul;
+	for (; *s != '\0'; s++) {
+	    hashval ^= (unsigned char)(*s);
+	    hashval *= 16777619ul;
+	}
 	return (hashsize == 0) ? hashval : (hashval % hashsize);
 }
 
 unsigned long genhash(char *s, int c, int hashsize)
 {
-	unsigned long hashval;
-	
-	for (hashval = (unsigned long)c; *s != '\0'; )
-	    hashval = (*s++) + (hashval << 6) + (hashval << 16) - hashval;
+	unsigned long hashval = 2166136261ul;
+	hashval ^= (unsigned long)c;
+	hashval *= 16777619ul;
+	for (; *s != '\0'; s++) {
+	    hashval ^= (unsigned char)(*s);
+	    hashval *= 16777619ul;
+	}
 	return (hashsize == 0) ? hashval : (hashval % hashsize);
 }
 

base/netcmp.c

@@ -24,6 +24,7 @@ the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
 #include <stdarg.h>
 #include <setjmp.h>
 #include <signal.h>
+#include <strings.h> /* for strncasecmp() */
 #include <time.h>    /* for time() as a seed for random number generator */
 #include <limits.h>
 #include <math.h>    /* for fabs() */
@@ -51,7 +52,7 @@ the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
 
 #ifdef TCL_NETGEN
 int InterruptPending = 0;
-void (*oldinthandler)() = SIG_DFL;
+void (*oldinthandler)(int) = SIG_DFL;
 extern Tcl_Interp *netgeninterp;
 extern int check_interrupt();
 #endif
@@ -1621,8 +1622,8 @@ void FormatIllegalElementClasses()
   char *permcount;
   int bytesleft;
 
-  permname = CALLOC(right_col_end + 2, sizeof(char));
-  permcount = CALLOC(right_col_end + 2, sizeof(char));
+  permname = CALLOC(right_col_end + 100, sizeof(char));
+  permcount = CALLOC(right_col_end + 100, sizeof(char));
   ostr = output_string_init();
 
   found = 0;
@@ -3581,7 +3582,7 @@ int FlattenUnmatched(struct nlist *tc, char *parent, int stoplevel, int loclevel
 				tc->name, parent, tc->file);
       changed = flattenInstancesOf(parent, tc->file, tc->name);
       Fprintf(stdout, "(%d instance%s)\n", changed, ((changed == 1) ? "" : "s"));
-      return 1;
+      return (changed != 0);
    }
 
    if (tc->cell == NULL) return 0;
@@ -7543,6 +7544,11 @@ struct nlist *addproxies(struct hashlist *p, void *clientdata)
 	     }
 	     else {
 		lob = ob;
+		if (ob == NULL) {
+		    Fprintf(stdout, "Error:  Premature end of pin list on "
+			"instance %s.\n", firstpin->instance.name);
+		    break;
+		}
 		ob->type = i++;
 		ob = ob->next;
 	     }
@@ -7890,7 +7896,7 @@ int MatchPins(struct nlist *tc1, struct nlist *tc2, int dolist)
       if (*(cover + i) == (char)0) {
 	 j = 0;
          for (ob2 = tc2->cell; ob2 != NULL; ob2 = ob2->next) {
-	    char *name1, *name2;
+	    char *name1, *name2, *aptr1 = NULL, *aptr2 = NULL;
 
 	    if (!IsPort(ob2)) break;
 
@@ -7908,8 +7914,59 @@ int MatchPins(struct nlist *tc1, struct nlist *tc2, int dolist)
 	    if (!strncmp(name1, "proxy", 5) && (ob2->node == -1)) name1 +=5;
 	    if (!strncmp(name2, "proxy", 5) && (ob1->node == -1)) name2 +=5;
 
+	    /* Recognize an array as matching a non-array of the same	*/
+	    /* name if the array is size 1.  There must be a better way	*/
+	    /* to do this;  this method makes excessive calls to	*/
+	    /* matchfunc().						*/
+
+	    if ((tc1->flags & CELL_PLACEHOLDER) || (tc2->flags && CELL_PLACEHOLDER)) {
+		aptr1 = strchr(name1, '[');
+		aptr2 = strchr(name2, '[');
+
+		if ((aptr1 != NULL) && (aptr2 == NULL)) {
+		    *aptr1 = '\0';
+		    if ((*matchfunc)(name1, name2)) {
+			/* Check that name1 does not have another array
+			 * component in ob1
+			 */
+			struct objlist *ob3;
+			for (ob3 = tc1->cell; ob3; ob3 = ob3->next) {
+			    if (!IsPort(ob3)) break;
+			    if (ob3 == ob1) continue;
+			    if (!strncmp(ob3->name, name1, strlen(name1)) &&
+				  *(ob3->name + strlen(name1)) == '[') {
+				*aptr1 = '[';
+				break;
+			    }
+			}
+		    }
+		}
+
+		if ((aptr1 == NULL) && (aptr2 != NULL)) {
+		    *aptr2 = '\0';
+		    if ((*matchfunc)(name1, name2)) {
+			/* Check that name2 does not have another array
+			 * component in ob1
+			 */
+			struct objlist *ob3;
+			for (ob3 = tc2->cell; ob3; ob3 = ob3->next) {
+			    if (!IsPort(ob3)) break;
+			    if (ob3 == ob2) continue;
+			    if (!strncmp(ob3->name, name2, strlen(name2)) &&
+				  *(ob3->name + strlen(name2)) == '[') {
+				*aptr2 = '[';
+				break;
+			    }
+			}
+		    }
+		}
+	    }
+
 	    if ((*matchfunc)(name1, name2)) {
 
+	       if (aptr1) *aptr1 = '[';
+	       if (aptr2) *aptr2 = '[';
+
 	       /* If both sides have unconnected nodes, then pins with	*/
 	       /* matching names are an automatic match.  Otherwise, if	*/
 	       /* matching black-box entries, then pins are always	*/
@@ -8063,6 +8120,8 @@ int MatchPins(struct nlist *tc1, struct nlist *tc2, int dolist)
 	       }
 	    }
 	    if (bangptr2) *bangptr2 = '!';
+	    if (aptr1) *aptr1 = '[';
+	    if (aptr2) *aptr2 = '[';
 	    j++;
          }
       }

base/netfile.c

@@ -685,6 +685,7 @@ void SpiceSkipNewLine(void)
   ungetc(contline, infile);
 }
 
+#if 0 /* Commented with "#if 0" due to comment characters in the comment */
 /*----------------------------------------------------------------------*/
 /* Function similar to strtok() for token parsing.  The difference is	*/
 /* that it takes two sets of delimiters.  The first is whitespace	*/
@@ -705,6 +706,7 @@ void SpiceSkipNewLine(void)
 /* the first character of the delimiter string in addition to marking	*/
 /* the boundary between two-character and one-character delimiters.	*/
 /*----------------------------------------------------------------------*/
+#endif
 
 char *strdtok0(char *pstring, char *delim1, char *delim2, char isverilog)
 {

base/netgen.c

@@ -25,6 +25,8 @@ the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
 #include <stdio.h>
 #include <stdlib.h>	/* for strtof() */
 #include <stdarg.h>
+#include <string.h>
+#include <strings.h>
 #include <ctype.h>	/* toupper() */
 #ifdef IBMPC
 #include <alloc.h>

base/objlist.c

@@ -449,6 +449,7 @@ int removeshorted(struct hashlist *p, int file)
          ob = nob;
       }
    }
+   return 1;
 }
 
 /* Remove shorted instances of class "class" from the database */
@@ -539,6 +540,7 @@ int deleteclass(struct hashlist *p, int file)
       }
    }
    FREE(checknodes);
+   return 1;
 }
 
 /* Remove all instances of class "class" from the database */
@@ -576,6 +578,7 @@ int renameinstances(struct hashlist *p, int file)
 	 }
       }
    }
+   return 1;
 }
 
 void InstanceRename(char *from, char *to, int file)
@@ -598,9 +601,10 @@ int freeprop(struct hashlist *p)
    struct property *prop;
 
    prop = (struct property *)(p->ptr);
-   if (prop->type == PROP_STRING)
+   if (prop->type == PROP_STRING) {
       if (prop->pdefault.string != NULL)
 	 FREE(prop->pdefault.string);
+   }
    else if (prop->type == PROP_EXPRESSION) {
       struct tokstack *stackptr, *nptr;
       stackptr = prop->pdefault.stack;

base/query.c

@@ -319,7 +319,7 @@ void Fanout(char *cell, char *node, int filter)
     while (ob != NULL) {
       char *obname = ob->name;
       if (*obname == '/') obname++;
-      if (ob->node == nodenum)
+      if (ob->node == nodenum) {
 	 if (filter == ALLOBJECTS) {
 	   Printf("  %s (", obname);
 	   PrintObjectType(ob->type);
@@ -331,6 +331,7 @@ void Fanout(char *cell, char *node, int filter)
 	 else if (ob->type == filter) {
 	   Printf("  %s\n", obname);
 	 }
+      }
       ob = ob->next;
     }
   }
@@ -933,7 +934,7 @@ static int PrintLeavesInCellHash(struct hashlist *p)
   struct nlist *ptr;
 
   ptr = (struct nlist *)(p->ptr);
-  if ((ptr->class == CLASS_SUBCKT)) PrintLeavesInCell(ptr->name, ptr->file);
+  if (ptr->class == CLASS_SUBCKT) PrintLeavesInCell(ptr->name, ptr->file);
   return(0);
 }
 

base/spice.c

@@ -21,6 +21,9 @@ the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
 #include "config.h"
 
 #include <stdio.h>
+#include <string.h>
+#include <strings.h>
+#include <ctype.h>
 #if 0
 #include <stdarg.h>  /* what about varargs, like in pdutils.c ??? */
 #endif
@@ -193,7 +196,7 @@ void SpiceSubCell(struct nlist *tp, int IsSubCell)
 		 if (ob->type == PROPERTY) {
 		    struct valuelist *vl;
 		    int i;
-		    for (i == 0;; i++) {
+		    for (i = 0;; i++) {
 		       vl = &(ob->instance.props[i]);
 		       if (vl->type == PROP_ENDLIST) break;
 		       else if (vl->type == PROP_VALUE) {
@@ -213,7 +216,7 @@ void SpiceSubCell(struct nlist *tp, int IsSubCell)
 		 if (ob->type == PROPERTY) {
 		    struct valuelist *vl;
 		    int i;
-		    for (i == 0;; i++) {
+		    for (i = 0;; i++) {
 		       vl = &(ob->instance.props[i]);
 		       if (vl->type == PROP_ENDLIST) break;
 		       else if (vl->type == PROP_VALUE) {
@@ -233,7 +236,7 @@ void SpiceSubCell(struct nlist *tp, int IsSubCell)
 	      if (ob->type == PROPERTY) {
 		 struct valuelist *vl;
 		 int i;
-		 for (i == 0;; i++) {
+		 for (i = 0;; i++) {
 		    vl = &(ob->instance.props[i]);
 		    if (vl->type == PROP_ENDLIST) break;
 		    else if (vl->type == PROP_VALUE) {
@@ -396,7 +399,7 @@ int renamepins(struct hashlist *p, int file)
    ptr = (struct nlist *)(p->ptr);
 
    if (ptr->file != file)
-      return 1;
+      return 0;
 
    for (ob = ptr->cell; ob != NULL; ob = ob->next) {
       if (ob->type == FIRSTPIN) {
@@ -423,6 +426,7 @@ int renamepins(struct hashlist *p, int file)
 	 }
       }
    }
+   return 1;
 }
 
 /* If any pins are marked unconnected, see if there are	*/
@@ -1779,10 +1783,19 @@ skip_ends:
       if (scan->next != NULL) scan = scan->next;
       tail->next = NULL;
 
+      /* Check for class defined inside itself (self-referential loop) */
+
+      if (!strcasecmp(model, scan->name)) {
+	 Fprintf(stderr, "Fatal: Class \"%s\" is instanced inside of itself!\n",
+		scan->name);
+         InputParseError(stderr);
+	 return;
+      }
+
       /* Check for ignored class */
 
-      if ((itype = IsIgnored(subcktname, filenum)) == IGNORE_CLASS) {
-          Printf("Class '%s' instanced in input but is being ignored.\n", model);
+      if ((itype = IsIgnored(scan->name, filenum)) == IGNORE_CLASS) {
+          Printf("Class '%s' instanced in input but is being ignored.\n", scan->name);
           return;
       }
 
@@ -1797,7 +1810,7 @@ skip_ends:
                break;
          }
          if (shorted == (unsigned char)1) {
-            Printf("Instance of '%s' is shorted, ignoring.\n", subcktname);
+            Printf("Instance of '%s' is shorted, ignoring.\n", scan->name);
 	    while (head) {
 	       p = head->next;
 	       FREE(head);

base/verilog.c

@@ -76,7 +76,8 @@ struct hashdict verilogparams;
 // Global storage for verilog definitions
 struct hashdict verilogdefs;
 // Record file pointer that is associated with the hash tables
-int hashfile = -1;
+int hashfilep = -1;	/* for parameters */
+int hashfiled = -1;	/* for definitions */
 
 // Global storage for wire buses
 struct hashdict buses;
@@ -156,7 +157,8 @@ struct expr_stack {
 //-------------------------------------------------------------------------
 // Evaluate an expression for an array bound.  This is much like
 // ReduceOneExpression() in netgen.c, but only handles basic integer
-// arithmetic (+,-,*,/) and grouping by parentheses.
+// arithmetic (+,-,*,/), grouping by parentheses, bit shifts, and
+// if-else operators.
 //
 // Returns 1 if successful, 0 on error.
 // Evaluated result is placed in the integer pointed to by "valptr".
@@ -220,6 +222,39 @@ int EvalExpr(struct expr_stack **stackptr, int *valptr)
 	    }
 	}
 
+	/* Reduce (a << b) and (a >> b) */
+
+	for (texp = start; texp; texp = texp->next) {
+	    if ((texp->last != NULL) && (texp->next != NULL) && (texp->oper != '\0')) {
+		if ((texp->last->oper == '\0') && (texp->next->oper == '\0')) {
+		    if (texp->oper == '<') {
+			/* Left shift */
+			texp->last->value <<= texp->next->value;
+			/* Remove two items from the stack */
+			tmp = texp;
+			texp = texp->last;
+			texp->next = tmp->next->next;
+			if (tmp->next->next) tmp->next->next->last = texp;
+			FREE(tmp->next);
+			FREE(tmp);
+			modified = TRUE;
+		    }
+		    if (texp->oper == '>') {
+			/* Right shift */
+			texp->last->value >>= texp->next->value;
+			/* Remove two items from the stack */
+			tmp = texp;
+			texp = texp->last;
+			texp->next = tmp->next->next;
+			if (tmp->next->next) tmp->next->next->last = texp;
+			FREE(tmp->next);
+			FREE(tmp);
+			modified = TRUE;
+		    }
+		} 
+	    }
+	}
+
 	/* Reduce (a * b) and (a / b) */
 
 	for (texp = start; texp; texp = texp->next) {
@@ -295,6 +330,39 @@ int EvalExpr(struct expr_stack **stackptr, int *valptr)
 	    }
 	}
 
+	/* Reduce (a ? b : c) */
+
+	for (texp = start; texp; texp = texp->next) {
+	    /* There must be at least five objects on the stack */
+	    if ((texp->last != NULL) && (texp->next != NULL) && (texp->oper != '\0')
+			&& (texp->next->next != NULL)
+			&& (texp->next->next->next != NULL)) {
+		if ((texp->last->oper == '\0') && (texp->next->oper == '\0')
+			&& (texp->next->next->next->oper == '\0')) {
+		    if ((texp->oper == '?') && (texp->next->next->oper == ':')) {
+			/* If-Else conditional */
+			if (texp->last->value)
+			    texp->last->value = texp->next->value;
+			else
+			    texp->last->value = texp->next->next->next->value;
+
+			/* Remove four items from the stack */
+			tmp = texp;
+			texp = texp->last;
+			texp->next = tmp->next->next->next->next;
+			if (tmp->next->next->next->next)
+			    tmp->next->next->next->next->last = texp;
+			FREE(tmp->next->next->next);
+			FREE(tmp->next->next);
+			FREE(tmp->next);
+			FREE(tmp);
+
+			modified = TRUE;
+		    }
+		} 
+	    }
+	}
+
 	/* Reduce (a) */
 
 	for (texp = start; texp; texp = texp->next) {
@@ -373,8 +441,15 @@ int ParseIntegerExpression(char *expr, int *iptr)
 
 	if (match(sptr, "+") || match(sptr, "-")
 	    	|| match(sptr, "*") || match(sptr, "/")
-	    	|| match(sptr, "(") || match(sptr, ")")) {
+	    	|| match(sptr, "(") || match(sptr, ")")
+	    	|| match(sptr, "<<") || match(sptr, ">>")
+	    	|| match(sptr, "?") || match(sptr, ":")) {
 	    newexp = (struct expr_stack *)MALLOC(sizeof(struct expr_stack));
+	    /* Note that "oper" is one character and that "<<" and ">>"
+	     * become '<' and '>', respectively.  The less-than and greater-
+	     * than operators are not (yet) handled but will need to be
+	     * recast to some other character in "oper".
+	     */
 	    newexp->oper = *sptr;
 	    newexp->value = 0;
 	    newexp->next = NULL;
@@ -389,7 +464,7 @@ int ParseIntegerExpression(char *expr, int *iptr)
 	if ((result = sscanf(sptr, "%d", &value)) != 1) {
 
 	    // Is name in the parameter list?
-	    kl = (struct property *)HashLookup(nexttok, &verilogparams);
+	    kl = (struct property *)HashLookup(sptr, &verilogparams);
 	    if (kl == NULL) {
 		Printf("Value %s in expression is not a number or a parameter.\n",
 				sptr);
@@ -402,27 +477,29 @@ int ParseIntegerExpression(char *expr, int *iptr)
 		    if (result != 1) {
 		        Printf("Parameter %s has value %s that cannot be parsed"
 				" as an integer.\n",
-				nexttok, kl->pdefault.string);
+				sptr, kl->pdefault.string);
 		    	value = 0;
 			break;
 		    }
 		}
 		else if (kl->type == PROP_INTEGER) {
 		    value = kl->pdefault.ival;
+		    result = 1;		// Assert valid result
 		}
 		else if (kl->type == PROP_DOUBLE) {
 		    value = (int)kl->pdefault.dval;
 		    if ((double)value != kl->pdefault.dval) {
 		        Printf("Parameter %s has value %g that cannot be parsed"
 				" as an integer.\n",
-				nexttok, kl->pdefault.dval);
+				sptr, kl->pdefault.dval);
 		    	value = 0;
 			break;
 		    }
+		    result = 1;		// Assert valid result
 		}
 		else {
 		    Printf("Parameter %s has unknown type; don't know how"
-				" to parse.\n", nexttok);
+				" to parse.\n", sptr);
 		    value = 0;
 		    break;
 		}
@@ -516,7 +593,8 @@ int GetBusTok(struct bus *wb)
 	    }
 	    else if (match(nexttok, "+") || match(nexttok, "-")
 	    		|| match(nexttok, "*") || match(nexttok, "/")
-	    		|| match(nexttok, "(") || match(nexttok, ")")) {
+	    		|| match(nexttok, "(") || match(nexttok, ")")
+	    		|| match(nexttok, "<<") || match(nexttok, ">>")) {
 		newexp = (struct expr_stack *)MALLOC(sizeof(struct expr_stack));
 		newexp->oper = *nexttok;
 		newexp->value = 0;
@@ -1879,7 +1957,8 @@ skip_endmodule:
 	// Allowed uses of "assign" for netlists:
 	//    "assign a = b" joins two nets.
 	//    "assign a = {b, c, ...}" creates a bus from components.
-	//    "assign" using any boolean arithmetic is not structural verilog.
+	//    "assign" using if-else constructs or bit shifts.
+	//   ("assign" using any other boolean arithmetic is not structural verilog.)
 	//    "assign a = {x{b}}" creates a bus by repeating a component.
 
 	if (nexttok && match(nexttok, "=")) {
@@ -2140,6 +2219,19 @@ nextinst:
 	 }
 	 SkipTokComments(VLOG_DELIMITERS);
       }
+      else if (loop.loopvar != NULL) {
+	 /* Instances created within a generate block for loop have an
+	  * implicit array
+	  */
+	 int loopval;
+	 struct property *klr;
+
+	 klr = (struct property *)HashLookup(loop.loopvar, &verilogparams);
+	 loopval = klr->pdefault.ival;
+
+         arraystart = arrayend = loopval;
+         sprintf(instancename + strlen(instancename), "[%d]", loopval);
+      }
 
       if (match(nexttok, "(")) {
 	 char savetok = (char)0;
@@ -2202,7 +2294,19 @@ nextinst:
 			 strcat(new_wire_bundle, nexttok);
 			 FREE(wire_bundle);
 			 wire_bundle = new_wire_bundle;
-			 if (!strcmp(nexttok, "}")) break;
+			 if (!strcmp(nexttok, "}"))
+			 {
+			    /* If a "bundle" has only one component, then it is
+			     * not really a bundle and should be treated as a
+			     * single wire.
+			     */
+			    if (strchr(wire_bundle, ',') == NULL) {
+				int blen = strlen(wire_bundle + 1) - 1;
+				memmove(wire_bundle, wire_bundle + 1, blen);
+				*(wire_bundle + blen) = '\0';
+			    }
+			    break;
+			 }
 			 SkipTokComments(VLOG_PIN_CHECK_DELIMITERS);
 		     }
 		     if (!nexttok) {
@@ -2578,6 +2682,7 @@ nextinst:
 	 char *brackptr;
 	 int j;
 	 char locinst[MAX_STR_LEN];
+	 int arraypos = (arraystart > arrayend) ? arraymax - i : i;
 
          if (i != -1)
 	    sprintf(locinst, "%s[%d]", instancename, i);
@@ -2627,7 +2732,14 @@ nextinst:
 	       else if (GetBus(scan->net, &wb) == 0) {
 		   char *bptr2;
 		   char *scanroot;
-		   scanroot = strsave(scan->net);
+		   int isbundle = FALSE;
+		   /* Skip over a bundle delimiter */
+		   if (*scan->net == '{') {
+		      scanroot = strsave(scan->net + 1);
+		      isbundle = TRUE;
+		   }
+		   else
+		      scanroot = strsave(scan->net);
 		   brackptr = strvchr(scanroot, '[');
 		   if (brackptr) *brackptr = '\0';
 
@@ -2660,6 +2772,7 @@ nextinst:
 		   else {
 		       // Instance must be an array
 		       char netname[MAX_STR_LEN];
+		       char *spos = scanroot;
 		       int slice, portlen, siglen;
 
 		       /* Get the array size of the port for bit slicing */
@@ -2671,27 +2784,49 @@ nextinst:
 		       if (siglen < 0) siglen = -siglen;
 		       siglen++;
 
-		       // If signal array is smaller than the portlength *
-		       // length of instance array, then the signal wraps.
+		       // If this is a bundle, then count out to the current
+		       // slice and read off the index.  NOTE:  Need to
+		       // handle multiple bits per bundle entry!
+		       if (isbundle) {
+			   int j;
+			   if (brackptr) *brackptr = '[';
+			   for (j = 0; j < arraypos * portlen; j++) {
+			       spos = strvchr(spos, ',');
+			       if (spos == NULL) break;
+			       spos++;
+			   }
+			   if (spos != NULL) {
+			       brackptr = strvchr(spos, '[');
+			       *brackptr = '\0';
+			       sscanf(brackptr + 1, "%d", &slice);
+			   }
+			   else spos = scanroot;  /* should emit an error here */
+		       }
+		       else {	/* not a bundle */
 
-		       if (wb2.start >= wb2.end && arraystart >= arrayend) {
-			   slice = wb.start - (arraystart - i) * portlen;
-			   while (slice < wb2.end) slice += siglen;
-		       }
-		       else if (wb2.start < wb2.end && arraystart > arrayend) {
-			   slice = wb.start + (arraystart - i) * portlen;
-			   while (slice > wb2.end) slice -= siglen;
-		       }
-		       else if (wb2.start > wb2.end && arraystart < arrayend) {
-			   slice = wb.start - (arraystart + i) * portlen;
-			   while (slice < wb2.end) slice += siglen;
-		       }
-		       else { // (wb2.start < wb2.end && arraystart < arrayend)
-			   slice = wb.start + (arraystart + i) * portlen;
-			   while (slice > wb2.end) slice -= siglen;
+		          // If signal array is smaller than the portlength *
+		          // length of instance array, then the signal wraps.
+
+		          if (wb2.start >= wb2.end && arraystart >= arrayend) {
+			      slice = wb.start - (arraystart - i) * portlen;
+			      while (slice < wb2.end) slice += siglen;
+		          }
+		          else if (wb2.start < wb2.end && arraystart > arrayend) {
+			      slice = wb.start + (arraystart - i) * portlen;
+			      while (slice > wb2.end) slice -= siglen;
+		          }
+		          else if (wb2.start > wb2.end && arraystart < arrayend) {
+			      slice = wb.start - (arraystart + i) * portlen;
+			      while (slice < wb2.end) slice += siglen;
+		          }
+		          else { // (wb2.start < wb2.end && arraystart < arrayend)
+			      slice = wb.start + (arraystart + i) * portlen;
+			      while (slice > wb2.end) slice -= siglen;
+		          }
+			  spos = scanroot;
 		       }
 
-		       sprintf(netname, "%s[%d]", scanroot, slice);
+		       sprintf(netname, "%s[%d]", spos, slice);
 	               if (LookupObject(netname, CurrentCell) == NULL) Node(netname);
 	               join(netname, obptr->name);
 		   }
@@ -2876,18 +3011,25 @@ char *ReadVerilogTop(char *fname, int *fnum, int blackbox)
      hashfunc = hashcase;
   }
 
-  if ((hashfile != -1) && (hashfile != *fnum)) {
-      /* Started a new file, so remove all the parameters and definitions */
+  if ((hashfilep != -1) && (hashfilep != *fnum)) {
+      /* Started a new file, so remove all the parameters */
       RecurseHashTable(&verilogparams, freeprop);
       HashKill(&verilogparams);
+      hashfilep = -1;
+  }
+  if ((hashfiled != -1) && (hashfiled != *fnum)) {
+      /* Started a new file, so remove all the definitions */
       RecurseHashTable(&verilogdefs, freeprop);
       HashKill(&verilogdefs);
-      hashfile = -1;
+      hashfiled = -1;
   }
-  if (hashfile == -1) {
+  if (hashfilep == -1) {
       InitializeHashTable(&verilogparams, OBJHASHSIZE);
+      hashfilep = filenum;
+  }
+  if (hashfiled == -1) {
       InitializeHashTable(&verilogdefs, OBJHASHSIZE);
-      hashfile = *fnum;
+      hashfiled = filenum;
   }
   definitions = &verilogdefs;
 

scripts/defs.mak.in

@@ -68,6 +68,7 @@ LIB_SPECS              = @LIB_SPECS@
 LIB_SPECS_NOSTUB       = @LIB_SPECS_NOSTUB@
 WISH_EXE	       = @WISH_EXE@
 TCL_LIB_DIR	       = @TCL_LIB_DIR@
+EXTRA_CFLAGS	       =
 
 CC                     = @CC@
 CPP                    = @CPP@
@@ -76,7 +77,7 @@ CXX                    = @CXX@
 CPPFLAGS               = -I. -I${NETGENDIR} @CPPFLAGS@
 DFLAGS                 = @extra_defs@ @stub_defs@ @DEFS@ -DSHDLIB_EXT=\"@SHDLIB_EXT@\" -DNDEBUG
 DFLAGS_NOSTUB          = @extra_defs@ @DEFS@ -DSHDLIB_EXT=\"@SHDLIB_EXT@\" -DNDEBUG
-CFLAGS                 = @CFLAGS@ @SHLIB_CFLAGS@ @INC_SPECS@
+CFLAGS                 = @CFLAGS@ @SHLIB_CFLAGS@ @INC_SPECS@ ${EXTRA_CFLAGS}
 
 DEPEND_FILE            = Depend
 DEPEND_FLAG            = @DEPEND_FLAG@

tcltk/netgen.tcl.in

@@ -429,7 +429,7 @@ proc netgen::lvs { name1 name2 {setupfile setup.tcl} {logfile comp.out} args} {
          set file1 $name1
          set cell1 $name1
       }
-      puts stdout "Reading netlist file $file1"
+      puts stdout "Reading netlist file $file1 for $name1"
       set fnum1 [netgen::readnet $file1]
    } else {
       set cell1 [lindex $flist1 0]
@@ -446,7 +446,7 @@ proc netgen::lvs { name1 name2 {setupfile setup.tcl} {logfile comp.out} args} {
          set file2 $name2
          set cell2 $name2
       }
-      puts stdout "Reading netlist file $file2"
+      puts stdout "Reading netlist file $file2 for $name2"
       set fnum2 [netgen::readnet $file2]
    } else {
       set cell2 [lindex $flist2 0]
@@ -461,7 +461,7 @@ proc netgen::lvs { name1 name2 {setupfile setup.tcl} {logfile comp.out} args} {
    }
 
    set clist1 [cells list $fnum1]
-   set cidx [lsearch -regexp $clist1 ^$cell1$]
+   set cidx [lsearch -exact $clist1 $cell1]
    if {$cidx < 0} {
       puts stderr "Cannot find cell $cell1 in file $file1"
       return
@@ -469,7 +469,7 @@ proc netgen::lvs { name1 name2 {setupfile setup.tcl} {logfile comp.out} args} {
       set cell1 [lindex $clist1 $cidx]
    }
    set clist2 [cells list $fnum2]
-   set cidx [lsearch -regexp $clist2 ^$cell2$]
+   set cidx [lsearch -exact $clist2 $cell2]
    if {$cidx < 0} {
       puts stderr "Cannot find cell $cell2 in file $file2"
       return
@@ -516,6 +516,14 @@ proc netgen::lvs { name1 name2 {setupfile setup.tcl} {logfile comp.out} args} {
 	    }
 	 }
 	 close $fsetup
+      	 if {$command != {}} {
+	    # Incomplete command.  Evaluate it to get a meaningful error message
+	    if {[catch {uplevel 1 [list namespace eval netgen $command]} msg]} {
+		set msg [string trimright $msg "\n"]
+		puts stderr "Error $setupfile:$sline (ignoring), $msg"
+		incr perrors
+	    }
+	 }
       } else {
 	 puts stdout "Error:  Cannot read the setup file $setupfile"
       }

tcltk/tclnetgen.c

@@ -21,6 +21,8 @@ the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
 #include <stdio.h>
 #include <stdlib.h>	/* for getenv */
 #include <string.h>
+#include <strings.h>
+#include <stdarg.h>	/* for va_list */
 
 #include <tcl.h>
 
@@ -43,6 +45,10 @@ the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
 #define FALSE 0
 #endif
 
+#if TCL_MAJOR_VERSION < 9
+typedef int Tcl_Size;
+#endif
+
 /*-----------------------*/
 /* Tcl 8.4 compatibility */
 /*-----------------------*/
@@ -283,7 +289,7 @@ GetTopCell(int fnum)
 int
 CommonGetFilenameOrFile(Tcl_Interp *interp, Tcl_Obj *fobj, int *fnumptr)
 {
-    int result, llen;
+    int result;
     int fnum, ftest;
     char *filename;
     struct nlist *tp;
@@ -366,7 +372,8 @@ CommonParseCell(Tcl_Interp *interp, Tcl_Obj *objv,
 	struct nlist **tpr, int *fnumptr)
 {
     Tcl_Obj *tobj, *fobj;
-    int result, llen;
+    int result;
+    Tcl_Size llen;
     int fnum, ftest, index;
     char *filename, *cellname;
     struct nlist *tp, *tp2;
@@ -1016,7 +1023,7 @@ _netgen_flatten(ClientData clientData,
     Tcl_Interp *interp, int objc, Tcl_Obj *const objv[])
 {
    char *repstr, *file;
-   int result, llen, filenum;
+   int result, filenum;
    struct nlist *tp, *tp2, *tptop;
 
    if ((objc < 2) || (objc > 4)) {
@@ -2114,7 +2121,7 @@ _netcmp_compare(ClientData clientData,
    int fnum1, fnum2, dolist = 0;
    int dohierarchy = FALSE;
    int assignonly = FALSE;
-   int argstart = 1, qresult, llen, result;
+   int argstart = 1, qresult, result;
    int hascontents1, hascontents2;
    struct Correspond *nextcomp;
    struct nlist *tp1 = NULL, *tp2 = NULL;
@@ -2828,7 +2835,7 @@ _netcmp_global(ClientData clientData,
     Tcl_Interp *interp, int objc, Tcl_Obj *const objv[])
 {
    char *filename, *cellname, *pattern;
-   int numchanged = 0, p, fnum, llen, result;
+   int numchanged = 0, p, fnum, result;
    struct nlist *tp;
 
    if (objc < 2) {
@@ -2925,7 +2932,8 @@ _netcmp_equate(ClientData clientData,
    struct ElementClass *saveEclass = NULL;
    struct NodeClass *saveNclass = NULL;
    int file1, file2;
-   int i, l1, l2, ltest, lent, dolist = 0, doforce = 0, dounique = 0;
+   int i, dolist = 0, doforce = 0, dounique = 0;
+   Tcl_Size l1, l2, lent, ltest;
    Tcl_Obj *tobj1, *tobj2, *tobj3;
 
    while (objc > 1) {
@@ -3426,10 +3434,11 @@ int
 _netcmp_property(ClientData clientData,
     Tcl_Interp *interp, int objc, Tcl_Obj *const objv[])
 {
-    int fnum, i, llen;
+    int fnum, i;
     struct nlist *tp;
     struct property *kl, *kllast, *klnext;
     Tcl_Obj *tobj1, *tobj2, *tobj3;
+    Tcl_Size llen;
     double dval;
     int ival, argstart;
 
@@ -4485,14 +4494,14 @@ void tcl_vprintf(FILE *f, const char *fmt, va_list args_in)
 
 void tcl_stdflush(FILE *f)
 {   
-   Tcl_SavedResult state;
+   Tcl_InterpState state;
    static char stdstr[] = "::flush stdxxx";
    char *stdptr = stdstr + 11;
     
-   Tcl_SaveResult(netgeninterp, &state);
+   state = Tcl_SaveInterpState(netgeninterp, TCL_OK);
    strcpy(stdptr, (f == stderr) ? "err" : "out");
    Tcl_Eval(netgeninterp, stdstr);
-   Tcl_RestoreResult(netgeninterp, &state);
+   Tcl_RestoreInterpState(netgeninterp, state);
 }
 
 /*------------------------------------------------------*/
@@ -4561,7 +4570,7 @@ int Tclnetgen_Init(Tcl_Interp *interp)
    /* Remember the interpreter */
    netgeninterp = interp;
 
-   if (Tcl_InitStubs(interp, "8.5", 0) == NULL) return TCL_ERROR;
+   if (Tcl_InitStubs(interp, TCL_VERSION, 0) == NULL) return TCL_ERROR;
   
    for (n = 0; netgen_cmds[n].name != NULL; n++) {
       sprintf(keyword, "netgen::%s", netgen_cmds[n].name);