Changeset 40207 for branches/czw_branch/20170908/Ohana/src/opihi/lib.shell/evaluate_stack.c

Timestamp:

Nov 8, 2017, 5:36:32 PM (9 years ago)

Author:

eugene

Message:

handle case of stack.name == NULL

File:

• branches/czw_branch/20170908/Ohana/src/opihi/lib.shell/evaluate_stack.c (modified) (1 diff)

branches/czw_branch/20170908/Ohana/src/opihi/lib.shell/evaluate_stack.c

@@ -188 +188 @@
           snprintf (line, 512, "syntax error: invalid operand for binary operation: %s or %s\n", stack[i-1].name, stack[i-2].name);
           push_error (line);
-          if (strchr(stack[i-1].name, ':') || strchr(stack[i-2].name, ':')) {
+          int isTrinary = TRUE;
+          isTrinary = isTrinary && (i >= 2);
+          // isTrinary = isTrinary && (stack[i - 1] != NULL);
+          // isTrinary = isTrinary && (stack[i - 2] != NULL);
+          isTrinary = isTrinary && (stack[i - 1].name != NULL);
+          isTrinary = isTrinary && (stack[i - 2].name != NULL);
+          isTrinary = isTrinary && (strchr(stack[i-1].name, ':') || strchr(stack[i-2].name, ':'));
+          if (isTrinary) {
             snprintf (line, 512, "syntax error: invalid operand for binary operation: %s or %s\n(Note that the : in a trinary operation must be protected by spaces)\n", stack[i-1].name, stack[i-2].name);
             push_error (line);