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2006-12-18make patch_delta() error cases a bit more verboseLibravatar Nicolas Pitre1-7/+6
It is especially important to distinguish between a malloc() failure from all the other cases. An out of memory condition is much less worrisome than a compatibility/corruption problem. Also make test-delta compilable again. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-20Remove all void-pointer arithmetic.Libravatar Florian Forster1-2/+2
ANSI C99 doesn't allow void-pointer arithmetic. This patch fixes this in various ways. Usually the strategy that required the least changes was used. Signed-off-by: Florian Forster <octo@verplant.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-04-24split the diff-delta interfaceLibravatar Nicolas Pitre1-2/+2
This patch splits the diff-delta interface into index creation and delta generation. A wrapper is provided to preserve the diff-delta() call. This will allow for an optimization in pack-objects.c where the source object could be fixed and a full window of objects tentatively tried against that same source object without recomputing the source index each time. This patch only restructure things, plus a couple cleanups for good measure. There is no performance change yet. Signed-off-by: Nicolas Pitre <nico@cam.org>
2006-04-07check patch_delta bounds more carefullyLibravatar Nicolas Pitre1-5/+21
Let's avoid going south with invalid delta data. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-02-09remove delta-against-self bitLibravatar Nicolas Pitre1-3/+2
After experimenting with code to add the ability to encode a delta against part of the deltified file, it turns out that resulting packs are _bigger_ than when this ability is not used. The raw delta output might be smaller, but it doesn't compress as well using gzip with a negative net saving on average. Said bit would in fact be more useful to allow for encoding the copying of chunks larger than 64KB providing more savings with large files. This will correspond to packs version 3. While the current code still produces packs version 2, it is made future proof so pack versions 2 and 3 are accepted. Any pack version 2 are compatible with version 3 since the redefined bit was never used before. When enough time has passed, code to use that bit to produce version 3 packs could be added. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-09-04[PATCH] NUL terminate the object data in patch_delta()Libravatar Sergey Vlasov1-1/+2
At least pretty_print_commit() expects to get NUL-terminated commit data to work properly. unpack_sha1_rest(), which reads objects from separate files, and unpack_non_delta_entry(), which reads non-delta-compressed objects from pack files, already add the NUL byte after the object data, but patch_delta() did not do it, which caused problems with, e.g., git-rev-list --pretty when there are delta-compressed commit objects. Signed-off-by: Sergey Vlasov <vsu@altlinux.ru> Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-06-29[PATCH] assorted delta code cleanupLibravatar Nicolas Pitre1-19/+3
This is a wrap-up patch including all the cleanups I've done to the delta code and its usage. The most important change is the factorization of the delta header handling code. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-28[PATCH] denser delta header encodingLibravatar Nicolas Pitre1-14/+14
Since the delta data format is not tied to any actual git object anymore, now is the time to add a small improvement to the delta data header as it is been done for packed object header. This patch allows for reducing the delta header of about 2 bytes and makes for simpler code. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-19[PATCH] Deltification library work by Nicolas Pitre.Libravatar Nicolas Pitre1-0/+88
This patch adds the basic library functions to create and replay delta information. Also included is a test-delta utility to validate the code. diff-delta was based on LibXDiff written by Davide Libenzi Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Davide Libenzi <davidel@xmailserver.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>