From 2e9385adb316bcb49b0fff662d1f7084cdb153cb Mon Sep 17 00:00:00 2001
From: SIGMazer <mazinasd7@gmail.com>
Date: Sun, 26 Jan 2025 21:45:13 +0200
Subject: [PATCH] memory checks

Signed-off-by: SIGMazer <mazinasd7@gmail.com>
---
 ast.c     | 14 +++++++-------
 lang.y    |  4 ++--
 lib/mem.c |  5 +++--
 3 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/ast.c b/ast.c
index 2aea597..1101bf1 100644
--- a/ast.c
+++ b/ast.c
@@ -101,27 +101,27 @@ bool set_array_variable(char *name, int length, TypeModifiers mods, VarType type
         {
         case VAR_INT:
             var->value.iarray = SAFE_MALLOC_ARRAY(int, length);
-            memset(var->value.iarray, 0, length * sizeof(int));
+            if(length) memset(var->value.iarray, 0, length * sizeof(int));
             break;
         case VAR_SHORT:
             var->value.sarray = SAFE_MALLOC_ARRAY(short, length);
-            memset(var->value.sarray, 0, length * sizeof(short));
+            if(length) memset(var->value.sarray, 0, length * sizeof(short));
             break;
         case VAR_FLOAT:
             var->value.farray = SAFE_MALLOC_ARRAY(float, length);
-            memset(var->value.farray, 0, length * sizeof(float));
+            if(length) memset(var->value.farray, 0, length * sizeof(float));
             break;
         case VAR_DOUBLE:
             var->value.darray = SAFE_MALLOC_ARRAY(double, length);
-            memset(var->value.darray, 0, length * sizeof(double));
+            if(length) memset(var->value.darray, 0, length * sizeof(double));
             break;
         case VAR_BOOL:
             var->value.barray = SAFE_MALLOC_ARRAY(bool, length);
-            memset(var->value.barray, 0, length * sizeof(bool));
+            if(length) memset(var->value.barray, 0, length * sizeof(bool));
             break;
         case VAR_CHAR:
             var->value.carray = SAFE_MALLOC_ARRAY(char, length);
-            memset(var->value.carray, 0, length * sizeof(char));
+            if(length) memset(var->value.carray, 0, length * sizeof(char));
             break;
         default:
             break;
@@ -3635,7 +3635,7 @@ void handle_return_statement(ASTNode *expr)
         }
     }
     // skibidi main function do not have jump buffer
-    if (CURRENT_JUMP_BUFFER() != NULL)
+    if (jump_buffer && CURRENT_JUMP_BUFFER() != NULL)
         LONGJMP();
 }
 
diff --git a/lang.y b/lang.y
index e624ba9..788c939 100644
--- a/lang.y
+++ b/lang.y
@@ -526,7 +526,6 @@ int main(int argc, char *argv[]) {
 }
 
 void yyerror(const char *s) {
-    extern char *yytext;
     fprintf(stderr, "Error: %s at line %d\n", s, yylineno - 1);
 }
 
@@ -562,7 +561,6 @@ void baka(const char* format, ...) {
 }
 
 char slorp_char(char chr) {
-    size_t chars_read;
     input_status status;
 
     status = input_char(&chr);
@@ -625,6 +623,7 @@ int slorp_int(int val) {
         fprintf(stderr, "Error reading integer: %d\n", status);
         exit(EXIT_FAILURE);
     }
+    return 0;
 }
 
 short slorp_short(short val) {
@@ -649,6 +648,7 @@ short slorp_short(short val) {
         fprintf(stderr, "Error reading short: %d\n", status);
         exit(EXIT_FAILURE);
     }
+    return 0;
 }
 
 float slorp_float(float var) {
diff --git a/lib/mem.c b/lib/mem.c
index c559fbc..59318f1 100644
--- a/lib/mem.c
+++ b/lib/mem.c
@@ -1,4 +1,5 @@
 #include "mem.h"
+#include <stdint.h>
 
 /**
  * @brief Retrieves the memory block header from a user pointer
@@ -319,8 +320,8 @@ void *safe_memcpy(void *dest, const void *src, size_t n)
     }
 
     // Check for buffer overlap
-    if ((src < dest && (const char *)src + n > dest) ||
-        (dest < src && (char *)dest + n > src))
+    if ((src < dest && (uintptr_t)src + n > (uintptr_t)dest) ||
+        (dest < src && (uintptr_t)dest + n > (uintptr_t)src))
     {
         errno = EINVAL;
         return NULL;