--- freem/src/operator.c	2025/03/09 15:20:18	1.4
+++ freem/src/operator.c	2025/05/05 19:34:46	1.8
@@ -1,23 +1,11 @@
 /*
- *                            *
- *                           * *
- *                          *   *
- *                     ***************
- *                      * *       * *
- *                       *  MUMPS  *
- *                      * *       * *
- *                     ***************
- *                          *   *
- *                           * *
- *                            *
- *
- *   operator.c
+ *   $Id: operator.c,v 1.8 2025/05/05 19:34:46 snw Exp $
  *    operators pattern-match, divide, multiply, add, power
  *
  *  
  *   Author: Serena Willis <snw@coherent-logic.com>
  *    Copyright (C) 1998 MUG Deutschland
- *    Copyright (C) 2020 Coherent Logic Development LLC
+ *    Copyright (C) 2020, 2025 Coherent Logic Development LLC
  *
  *
  *   This file is part of FreeM.
@@ -35,6 +23,22 @@
  *   You should have received a copy of the GNU Affero Public License
  *   along with FreeM.  If not, see <https://www.gnu.org/licenses/>.
  *
+ *   $Log: operator.c,v $
+ *   Revision 1.8  2025/05/05 19:34:46  snw
+ *   Fix E notation code to disallow more than one minus sign after the E
+ *
+ *   Revision 1.7  2025/04/10 01:24:38  snw
+ *   Remove C++ style comments
+ *
+ *   Revision 1.6  2025/04/09 19:52:02  snw
+ *   Eliminate as many warnings as possible while building with -Wall
+ *
+ *   Revision 1.5  2025/03/09 19:50:47  snw
+ *   Second phase of REUSE compliance and header reformat
+ *
+ *
+ * SPDX-FileCopyrightText:  (C) 2025 Coherent Logic Development LLC
+ * SPDX-License-Identifier: AGPL-3.0-or-later
  **/
 
 #include "mpsdef.h"
@@ -801,8 +805,8 @@ void add (char *a, char *b)				/* string
 		mi = 1;
 		a[0] = ZERO;
 	    }
-	    while (a[mi] == ZERO) {
-		stcpy (&a[mi], &a[mi + 1]);
+	    while (a[(int) mi] == ZERO) {
+		stcpy (&a[(int) mi], &a[((int) mi) + 1]);
 		dpa--;
 	    }
 	    if (dpa < 0)
@@ -830,7 +834,7 @@ void add (char *a, char *b)				/* string
 	    }
 	    a[0] = MINUS;
 	}
-	if (a[mi] == EOL) {
+	if (a[(int) mi] == EOL) {
 	    a[0] = ZERO;
 	    a[1] = EOL;
 	}
@@ -1128,7 +1132,7 @@ void mdiv (char *uu, char *v, short typ)
 
             case '#':
                 snprintf (uu, STRLEN - 1, "%ld\201", (((long) fp_uu) % ((long) fp_v)));
-                //snprintf (uu, STRLEN - 1, "%ld\201", ((long) fp_uu < 0 ? (((long) fp_uu % (long) fp_v) + (long) fp_v) % (long) fp_v : (long) fp_uu % (long) fp_v));
+                /*snprintf (uu, STRLEN - 1, "%ld\201", ((long) fp_uu < 0 ? (((long) fp_uu % (long) fp_v) + (long) fp_v) % (long) fp_v : (long) fp_uu % (long) fp_v)); */
                 break;
         }
         
@@ -1974,6 +1978,10 @@ int numlit (char *str)
 	}
 	if (expflg) {
 	    if (ch == MINUS) {
+                if (str[i + 1] == '-') {
+                    merr_raise (ILLOP);
+                    return (0);
+                }
 		expflg = (-expflg);
 		continue;
 	    }