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changeset 755:3f84521fdd31

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Urgh. Fix previous commit.
author Matti Hamalainen <ccr@tnsp.org>
date Wed, 01 Feb 2023 13:17:26 +0200
parents d91d1174cfd8
children 4bd82aca5e98
files th_datastruct.c
diffstat 1 files changed, 21 insertions(+), 9 deletions(-) [+]
line wrap: on
line diff
--- a/th_datastruct.c	Wed Feb 01 13:02:35 2023 +0200
+++ b/th_datastruct.c	Wed Feb 01 13:17:26 2023 +0200
@@ -224,19 +224,31 @@
 
 void th_llist_reverse(th_llist_t **list)
 {
-    th_llist_t *curr = *list, *prev = NULL;
+    th_llist_t
+        *f_curr = *list, *f_prev = NULL,
+        *b_curr = *list, *b_prev = NULL;
 
-    while (curr != NULL)
+    if (b_curr != NULL)
+        b_prev = b_curr->prev;
+
+    while (f_curr != NULL)
     {
-        th_llist_t *next = curr->next;
-        curr->next = prev;
-        prev = curr;
-        curr = next;
-        if (curr != NULL)
-            curr->prev = prev;
+        th_llist_t
+            *f_next = f_curr->next,
+            *b_next = b_curr->prev;
+
+        f_curr->next = f_prev;
+        f_prev = f_curr;
+        f_curr = f_next;
+
+        b_curr->prev = b_prev;
+        b_prev = b_curr;
+        b_curr = b_next;
     }
 
-    *list = prev;
+    *list = f_prev;
+    if (b_curr != NULL)
+        b_curr->prev = b_prev;
 }