fix: fixed A LOT of bugs and memory leaks. Removed ast_is_* commands as they're not really useful and seems redundant with ast_get_*. Also made some changes to lists utils to make architecture clearer and some other random tweaks or fixes.

src/utils/ast/ast_neg.c

@@ -1,34 +1,38 @@
 #include "ast_neg.h"
 
+#include <stdio.h>
 #include <stdlib.h>
 
-bool ast_is_neg(struct ast *node)
-{
-    return node != NULL && node->type == AST_NEG;
-}
-
 struct ast_neg *ast_get_neg(struct ast *node)
 {
-    if (ast_is_neg(node))
-        return node->data;
-    return NULL;
+    if (node == NULL || node->type != AST_NEG)
+        return NULL;
+    return node->data;
 }
 
 struct ast *ast_create_neg(bool negation, struct ast *child)
 {
-    struct ast_neg *node = malloc(sizeof(struct ast_neg));
-    if (!node)
+    struct ast_neg *neg_data = malloc(sizeof(struct ast_neg));
+    if (neg_data == NULL)
+    {
+        perror("Error: could not allocate more memory");
         return NULL;
+    }
 
-    node->negation = negation;
-    node->child = child;
-    return ast_create(AST_NEG, node);
+    neg_data->negation = negation;
+    neg_data->child = child;
+    struct ast *result = ast_create(AST_NEG, neg_data);
+    if (result == NULL)
+        free(neg_data);
+
+    return result;
 }
 
 void ast_free_neg(struct ast_neg *node)
 {
-    if (!node)
+    if (node == NULL)
         return;
+
     ast_free(&node->child);
     free(node);
 }