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path: root/lib/libalpm/delta.c
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2008-11-30Add regex to delta code so we don't segfault when reading lineDan McGee1-0/+15
If the delta line doesn't match our regex, we won't go and process it, possibly walking off the end of the string. Signed-off-by: Dan McGee <dan@archlinux.org>
2008-06-04Use correct C type for file sizesDan McGee1-8/+8
We have been using unsigned long as a file size type for a while, which works but isn't quite correct and could easily break. Worse was probably our use of int in the download callback functions, which could be restrictive for packages > 2GB in size. Switch all file size variables to use off_t, which is the preferred type for file sizes. Note that at least on Linux, all applications compiled against libalpm must now be sure to use large file support, where _FILE_OFFSET_BITS is defined to be 64 or there will be some weird issues that crop up. Signed-off-by: Dan McGee <dan@archlinux.org>
2008-04-26Completely rework delta algorithmChantry Xavier1-95/+137
Using the graph structures that Nagy set up for dependency sorting, we now do a similar process for deltas. Load up all of the deltas into a graph object on which we can then apply Dijkstra's algorithm, using the new weight field of graph struct. We initialize the nodes weight using the base files that we can use in our filecache (both filename and md5sum must match). The algorithm then picks the best path among those that can be resolved. Note that this algorithm has a few advantages over the old one: 1. It is completely file agnostic. These delta chains do not have to consist of package files- this could be adopted to do delta-fied DBs. 2. It does not use the local_db anymore, or even care if a package or file is currently installed. Instead, it only looks in the filecache for files and packages that match delta chain entries. Original-work-by: Dan McGee <dan@archlinux.org> Signed-off-by: Chantry Xavier <shiningxc@gmail.com>
2008-04-26Rework delta struct and modify code accordinglyDan McGee1-46/+39
Start to move the delta struct away from an assumed package name scheme and towards something that is package (or even filename) agnostic. This will allow us much greater flexibility in the usage of deltas (maybe even sync DBs some day) as well as allowing code outside of delta.h/delta.c to be much cleaner with less of a need for snprintf() calls. Signed-off-by: Dan McGee <dan@archlinux.org>
2008-04-06Remove unnecessary header file, move one macro to util.cDan McGee1-1/+0
Signed-off-by: Dan McGee <dan@archlinux.org>
2008-01-21Convert deltas to dynamic allocationDan McGee1-7/+16
Another elimination of a static length structure in libalpm. Should result in a little more memory saved during execution of packages with lots of deltas attached. Signed-off-by: Dan McGee <dan@archlinux.org>
2007-12-21Fix memory leak in shortest_delta_path.Nathan Jones1-2/+4
It is possible for the if statement to never succeed, causing path to never be freed. It is also possible for the if statement to succeed more than once per loop, which could have caused a segfault. Signed-off-by: Nathan Jones <nathanj@insightbb.com> Signed-off-by: Dan McGee <dan@archlinux.org>
2007-12-10Update GNU GPL boilerplate and copyright datesDan McGee1-3/+1
Update the GPL boilerplate to direct people to the GNU website for a copy of the license, as well as bump all of Judd's copyrights to 2007. Signed-off-by: Dan McGee <dan@archlinux.org>
2007-11-17Generalized alpm_list_find.Nagy Gabor1-1/+1
The old alpm_list_find was renamed to alpm_list_find_ptr, and a new alpm_list_find was introduced, which uses the fn comparison-function parameter in its decision. Now both alpm_list_find_ptr (a new ptrcmp helper function was also added) and alpm_list_find_str are just an alpm_list_find call. Signed-off-by: Nagy Gabor <ngaba@bibl.u-szeged.hu> Signed-off-by: Chantry Xavier <shiningxc@gmail.com> [Dan: made ptrcmp a static function] Signed-off-by: Dan McGee <dan@archlinux.org>
2007-11-16War on whitespaceDan McGee1-2/+2
Run the kernel's cleanfile script on all of our source files. Signed-off-by: Dan McGee <dan@archlinux.org>
2007-10-29libalpm/delta: add const to most methodsDan McGee1-4/+4
Signed-off-by: Dan McGee <dan@archlinux.org>
2007-10-29libalpm: introduce MALLOC and CALLOC macrosDan McGee1-1/+2
These macros take the place of the common 4 or 5 line blocks of code we had in most places that called malloc or calloc. This should reduce some code duplication and make memory allocation more standard in libalpm. Highlights: * Note that the MALLOC macro actually uses calloc, this is just for safety so that memory is initialized to 0. This can be easily changed in one place. * One malloc call was completely eliminated- it made more sense to do it on the stack. * The use of RET_ERR in public functions (mainly the alpm_*_new functions) was standardized, this makes sense so pm_errno is set. Signed-off-by: Dan McGee <dan@archlinux.org>
2007-10-19Add pmdelta_t structure and functions to libalpm.Nathan Jones1-0/+265
Signed-off-by: Nathan Jones <nathanj@insightbb.com> Signed-off-by: Dan McGee <dan@archlinux.org>