From fac92f62f731f7fa5a4f10d5dcfd384be1c4fb64 Mon Sep 17 00:00:00 2001
From: Scarlett <kadansk8@gmail.com>
Date: Mon, 31 Mar 2025 21:18:21 -0400
Subject: [PATCH] segfaults fixed. need to verify what is being passed to
 functions.

---
 src/symbol_table.c | 39 ++++++++++++++++++++++++++++++++-------
 1 file changed, 32 insertions(+), 7 deletions(-)

diff --git a/src/symbol_table.c b/src/symbol_table.c
index a4cee49..e68c886 100644
--- a/src/symbol_table.c
+++ b/src/symbol_table.c
@@ -968,10 +968,24 @@ void print_symbol_table(SymbolTable *table, FILE *file_ptr) {
 }*/
 void print_symbol_table(SymbolTable *table, FILE *file_ptr) {
 
+        if (table == NULL) {
+                printdebug(
+                    "%s[FATAL] passed in NULL table to print_symbol_table",
+                    COLOR_RED);
+                return;
+        }
+
+        if (table->Parent_Scope != NULL) {
+                printdebug("%s[WARNING] passed in a non-top level scope to "
+                           "print_symbol_table",
+                           COLOR_ORANGE);
+        }
+
         if (table->Parent_Scope == NULL) {
                 fprintf(file_ptr, "%-17s: %-6s : %-6s : %-21s: %-28s\n", "NAME",
                         "SCOPE", "PARENT", "TYPE", "Extra annotation");
         }
+
         TableNode *entrie = table->entries;
         fprintf(file_ptr, "-----------------:--------:--------:----------------"
                           "------:---------"
@@ -1213,7 +1227,19 @@ bool typeCheck(char *firstID, char *secondID) {
         return false;
 }
 
-SymbolTable *getParent(SymbolTable *st) { return st->Parent_Scope; }
+SymbolTable *getParent(SymbolTable *st) {
+        if (st == NULL) {
+                printdebug("passed a NULL symbol table to getParent function. "
+                           "Invalid.");
+                return NULL;
+        }
+        if (st->Parent_Scope == NULL) {
+                printdebug("passed a top level scope to getParent function. "
+                           "Invalid.");
+                return NULL;
+        }
+        return st->Parent_Scope;
+}
 
 ListOfTable *getChildren(SymbolTable *st) { return st->Children_Scope; }
 SymbolTable *getFirstChild(ListOfTable *lt) { return lt->table; }
@@ -1222,17 +1248,16 @@ TableNode *getFirstEntry(SymbolTable *st) { return st->entries; }
 
 // Segfaults when passed an invalid table node!
 TableNode *getNextEntry(TableNode *tn) {
-                if (tn == NULL) {
+        if (tn == NULL) {
                 printdebug("passed a NULL table node to getNextEntry");
                 return undefined;
-                }
-                if (tn == undefined) {
+        }
+        if (tn == undefined) {
                 printdebug("passed an undefined table node to getNextEntry");
                 return undefined;
-                }
-                return tn->next; 
         }
-
+        return tn->next;
+}
 
 // uncomment the below main function along with the headers above for a simple
 // standalone test of table and entry creation