From 46caba5943149b1302b3ff3c6706e85c1927f01f Mon Sep 17 00:00:00 2001
From: wjf-hs <Orig5826@163.com>
Date: Wed, 30 Apr 2025 14:08:10 +0800
Subject: [PATCH] =?UTF-8?q?=E8=BF=98=E6=98=AF=E4=B8=8D=E5=AF=B9=EF=BC=8C?=
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---
 src/list.c | 90 +++++++++++++++++++++++++++++++-----------------------
 1 file changed, 51 insertions(+), 39 deletions(-)

diff --git a/src/list.c b/src/list.c
index 9524eff..55415a8 100644
--- a/src/list.c
+++ b/src/list.c
@@ -347,11 +347,61 @@ done:
     bool contain_last_obj = false;
     int temp = 0;
     bool negative = false;
+
+    int start0 = start;
+    int end0 = end;
     if (step == 0)
     {
         return NULL;
     }
 
+    if(start0 == LIST_UNLIMITED)
+    {
+        start = 0 - (int)LIST_UNLIMITED;
+    }
+
+    if(end0 == LIST_UNLIMITED)
+    {
+        end = (int)LIST_UNLIMITED;
+    }
+
+    if(start < 0)
+    {
+        start += (int)self->size(self);
+        if(start < 0)
+        {
+            start = 0;
+        }
+    }
+    else
+    {
+        if(start >= (int)self->size(self))
+        {
+            empty = true;
+        }
+    }
+
+    if(end < 0)
+    {
+        end += (int)self->size(self);
+        if(end < 0)
+        {
+            empty = true;
+        }
+    }
+    else
+    {
+        if (end >= (int)self->size(self))
+        {
+            end = (int)self->size(self);
+        }
+
+        if(step < 0)
+        {
+            contain_last_obj = true;
+        }
+    }
+
     if(step < 0)
     {
         negative = true;
@@ -375,45 +425,7 @@ done:
         {
             end = temp;
         }
-    }
-
-    if(start < 0)
-    {
-        start += (int)self->size(self);
-        if(start < 0)
-        {
-            start = 0;
-        }
-    }
-    else
-    {
-        if(start == LIST_UNLIMITED)
-        {
-            start = 0;
-            contain_last_obj = true;
-        }
-
-        if(start >= (int)self->size(self))
-        {
-            empty = true;
-        }
-    }
-
-    if(end < 0)
-    {
-        end += (int)self->size(self);
-        if(end < 0)
-        {
-            empty = true;
-        }
-    }
-    else
-    {
-        if (end == LIST_UNLIMITED || end >= (int)self->size(self))
-        {
-            end = (int)self->size(self) - 1;
-            contain_last_obj = true;
-        }
+        end = temp;
     }
 
     if(start >= end)