[Bf-blender-cvs] [9b2877ad88b] blender2.8: New util function: BLI_listbases_swaplinks
Dalai Felinto
noreply at git.blender.org
Wed Mar 8 23:37:42 CET 2017
Commit: 9b2877ad88baaeb30f858359479554320c19448d
Author: Dalai Felinto
Date: Wed Mar 8 20:55:42 2017 +0100
Branches: blender2.8
https://developer.blender.org/rB9b2877ad88baaeb30f858359479554320c19448d
New util function: BLI_listbases_swaplinks
===================================================================
M source/blender/blenlib/BLI_listbase.h
M source/blender/blenlib/intern/listbase.c
===================================================================
diff --git a/source/blender/blenlib/BLI_listbase.h b/source/blender/blenlib/BLI_listbase.h
index 96349a7b066..4ec222c073e 100644
--- a/source/blender/blenlib/BLI_listbase.h
+++ b/source/blender/blenlib/BLI_listbase.h
@@ -76,6 +76,7 @@ int BLI_listbase_count(const struct ListBase *listbase) ATTR_WARN_UNUSED_RESULT
void BLI_freelinkN(struct ListBase *listbase, void *vlink) ATTR_NONNULL(1);
void BLI_listbase_swaplinks(struct ListBase *listbase, void *vlinka, void *vlinkb) ATTR_NONNULL(1, 2);
+void BLI_listbases_swaplinks(struct ListBase *listbasea, struct ListBase *listbaseb, void *vlinka, void *vlinkb) ATTR_NONNULL(2, 3);
void BLI_movelisttolist(struct ListBase *dst, struct ListBase *src) ATTR_NONNULL(1, 2);
void BLI_duplicatelist(struct ListBase *dst, const struct ListBase *src) ATTR_NONNULL(1, 2);
diff --git a/source/blender/blenlib/intern/listbase.c b/source/blender/blenlib/intern/listbase.c
index c9bf4976ae8..3bf0dfa09fa 100644
--- a/source/blender/blenlib/intern/listbase.c
+++ b/source/blender/blenlib/intern/listbase.c
@@ -170,6 +170,34 @@ void BLI_listbase_swaplinks(ListBase *listbase, void *vlinka, void *vlinkb)
}
/**
+ * Swaps \a vlinka and \a vlinkb from their respective lists. Assumes they are both already in their lista!
+ */
+void BLI_listbases_swaplinks(ListBase *listbasea, ListBase *listbaseb, void *vlinka, void *vlinkb)
+{
+ Link *linka = vlinka;
+ Link *linkb = vlinkb;
+ Link linkc = {NULL};
+
+ if (!linka || !linkb) {
+ return;
+ }
+
+ /* Temporary link to use as placeholder of the links positions */
+ BLI_insertlinkafter(listbasea, linka, &linkc);
+
+ /* Bring linka into linkb position */
+ BLI_remlink(listbasea, linka);
+ BLI_insertlinkafter(listbaseb, linkb, linka);
+
+ /* Bring linkb into linka position */
+ BLI_remlink(listbaseb, linkb);
+ BLI_insertlinkafter(listbasea, &linkc, linkb);
+
+ /* Remove temporary link */
+ BLI_remlink(listbasea, &linkc);
+}
+
+/**
* Removes the head from \a listbase and returns it.
*/
void *BLI_pophead(ListBase *listbase)
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