diff options
Diffstat (limited to 'source/blender/blenlib/intern/listbase.c')
| -rw-r--r-- | source/blender/blenlib/intern/listbase.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/source/blender/blenlib/intern/listbase.c b/source/blender/blenlib/intern/listbase.c index 46dcee48eda..0a6d575c7d6 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) |