This is my latest patch to add 'u' (Undo) command support to BusyBox vi and it is a major improvement over the previous two.
Improvements over v2: * Seems to work with all editing functions I could test * Find-and-replace undo now works; can reverse e.g. :1,3 s/foo/bar/ * Friendly constants for undo flags (UNDO_INS, ALLOW_UNDO, etc.) * Removed dot_delete() (was only calling another function and only used once) * Proper #if/#else/#endif (builds without undo don't waste a parameter now) * Patch also uses file_modified in a MUCH more logical/sane manner Tested on x86_64, probably works everywhere though. On x86_64, it only weighs in at +1266 bytes of text with no change in data/bss. I feel that this patch is largely complete; however, I would like to eventually implement some form of input grouping so that it doesn't malloc() twice for every single action taken including a single character being typed within insert mode (and it doubles for replace mode), which is the biggest problem I can see. Fortunately, it is unlikely that this will exhaust memory on systems with even a modest amount of RAM. I am very happy to be able to contribute something of value to BusyBox! :-) Signed-off-by: Jody Bruchon <j...@jodybruchon.com>
busybox_vi_undo_v3.patch
Description: Binary data
_______________________________________________ busybox mailing list busybox@busybox.net http://lists.busybox.net/mailman/listinfo/busybox
