include/git2/diff.h


Log

Author Commit Date CI Message
Russell Belfer d20b0449 2013-05-24T10:37:40 Clarify GIT_DIFF_INCLUDE_UNTRACKED_CONTENT option This improves the docs for GIT_DIFF_INCLUDE_UNTRACKED_CONTENT as well as the other flags related to UNTRACKED items in diff, plus it makes that flag now automatically turn on GIT_DIFF_INCLUDE_UNTRACKED which seems like a reasonable dwim type of change.
Russell Belfer 67db583d 2013-05-23T15:06:07 More diff rename tests; better split swap handling This adds a couple more tests of different rename scenarios. Also, this fixes a problem with the case where you have two "split" deltas and the left half of one matches the right half of the other. That case was already being handled, but in the wrong order in a way that could result in bad output. Also, if the swap also happened to put the other two halves into the correct place (i.e. two files exchanged places with each other), then the second delta was left with the SPLIT flag set when it really should be cleared.
Russell Belfer a21cbb12 2013-05-22T10:37:12 Significant rename detection rewrite This flips rename detection around so instead of creating a forward mapping from deltas to possible rename targets, instead it creates a reverse mapping, looking at possible targets and trying to find a source that they could have been renamed or copied from. This is important because each output can only have a single source, but a given source could map to multiple outputs (in the form of COPIED records). Additionally, this makes a couple of tweaks to the public rename detection APIs, mostly renaming a couple of options that control the behavior to make more sense and to be more like core Git. I walked through the tests looking at the exact results and updated the expectations based on what I saw. The new code is different from the old because it cannot give some nonsense results (like A was renamed to both B and C) which were part of the outputs previously.
Russell Belfer 9be5be47 2013-05-20T13:37:21 More git_diff_find_similar improvements - Add new GIT_DIFF_FIND_EXACT_MATCH_ONLY flag to do similarity matching without using the similarity metric (i.e. only compare the SHA). - Clean up the similarity measurement code to more rigorously distinguish between files that are not similar and files that are not comparable (previously, a 0 could either mean that the files could not be compared or that they were totally different) - When splitting a MODIFIED file into a DELETE/ADD pair, actually make a DELETED/UNTRACKED pair if the right side of the diff is from the working directory. This prevents an odd mix of ADDED and UNTRACKED files on workdir diffs.
Russell Belfer d958e37a 2013-05-17T17:21:45 Fix issues with git_diff_find_similar There are a number of bugs in the rename code that only were obvious when I started testing it against large old repos with more complex patterns. (The code to do that testing is not ready to merge with libgit2, but I do plan to add more thorough tests.) This contains a significant number of changes and also tweaks the public API slightly to make emulating core git easier. Most notably, this separates the GIT_DIFF_FIND_AND_BREAK_REWRITES flag into FIND_REWRITES (which adds a self-similarity score to every modified file) and BREAK_REWRITES (which splits the modified deltas into add/remove pairs in the diff list). When you do a raw output of core git, rewrites show up as M090 or such, not at A and D output, so I wanted to be able to emulate that. Publicly, this also changes the flags to be uint16_t since we don't need values out of that range. Internally, this contains significant changes from a number of small bug fixes (like using the wrong side of the diff to decide if the object could be found in the ODB vs the workdir) to larger issues about which files can and should be compared and how the various edge cases of similarity scores should be treated. Honestly, I don't think this is the last update that will have to be made to this code, but I think this moves us closer to correct behavior and I tried to document the code so it would be easier to follow..
Russell Belfer aadfa85b 2013-05-17T16:41:15 Add git_diff_print_raw printing helper Makes it easier to emulate the --raw option
Russell Belfer d63eec69 2013-05-07T04:44:08 Improve diff function docs
Russell Belfer e35e2684 2013-05-07T04:32:17 Add GIT_DIFF_LINE_CONTEXT_EOFNL This adds a new line origin constant for the special line that is used when both files end without a newline. In the course of writing the tests for this, I was having problems with modifying a file but not having diff notice because it was the same size and modified less than one second from the start of the test, so I decided to start working on nanosecond timestamp support. This commit doesn't contain the nanosecond support, but it contains the reorganization of maybe_modified and the hooks so that if the nanosecond data were being read by stat() (or rather being copied by git_index_entry__init_from_stat), then the nsec would be taken into account. This new stuff could probably use some more tests, although there is some amount of it here.
Russell Belfer 61c00541 2013-04-29T06:21:56 Update comment for clarity
Russell Belfer e26b14c0 2013-04-26T15:35:47 Update diff handling of untracked directories When diff encounters an untracked directory, there was a shortcut that it took which is not compatible with core git. This makes the default behavior no longer take that shortcut and instead look inside the untracked directory to see if there are any untracked files within it. If there are not, then the directory is treated as an ignore directory instead of an untracked directory. This has implications for the git_status APIs.
Russell Belfer 0c289dd7 2013-03-25T16:40:16 Recursing into ignored dirs for diff and status This implements working versions of GIT_DIFF_RECURSE_IGNORED_DIRS and GIT_STATUS_OPT_RECURSE_IGNORED_DIRS along with some tests for the newly available behaviors. This is not turned on by default for status, but can be accessed via the options to the extended version of the command.
Carlos Martín Nieto 1aa5318a 2013-03-09T16:04:34 diff: allow asking for diffs with no context Previously, 0 meant default. This is problematic, as asking for 0 context lines is a valid thing to do. Change GIT_DIFF_OPTIONS_INIT to default to three and stop treating 0 as a magic value. In case no options are provided, make sure the options in the diff object default to 3.
Russell Belfer d4b747c1 2013-02-21T16:44:44 Add diff rename tests with partial similarity This adds some new tests that actually exercise the similarity metric between files to detect renames, copies, and split modified files that are too heavily modified. There is still more testing to do - these tests are just partially covering the cases. There is also one bug fix in this where a change set with only MODIFY being broken into ADD/DELETE (due to low self-similarity) without any additional RENAMED entries would end up not processing the split requests (because the num_rewrites counter got reset).
Russell Belfer 960a04dd 2013-02-21T12:40:33 Initial integration of similarity metric to diff This is the initial integration of the similarity metric into the `git_diff_find_similar()` code path. The existing tests all pass, but the new functionality isn't currently well tested. The integration does go through the pluggable metric interface, so it should be possible to drop in an alternative to the internal metric that libgit2 implements. This comes along with a behavior change for an existing interface; namely, passing two NULLs to git_diff_blobs (or passing NULLs to git_diff_blob_to_buffer) will now call the file_cb parameter zero times instead of one time. I know it's strange that that change is paired with this other change, but it emerged from some initialization changes that I ended up making.
Russell Belfer 71a3d27e 2013-02-08T10:06:47 Replace diff delta binary with flags Previously the git_diff_delta recorded if the delta was binary. This replaces that (with no net change in structure size) with a full set of flags. The flag values that were already in use for individual git_diff_file objects are reused for the delta flags, too (along with renaming those flags to make it clear that they are used more generally). This (a) makes things somewhat more consistent (because I was using a -1 value in the "boolean" binary field to indicate unset, whereas now I can just use the flags that are easier to understand), and (b) will make it easier for me to add some additional flags to the delta object in the future, such as marking the results of a copy/rename detection or other deltas that might want a special indicator. While making this change, I officially moved some of the flags that were internal only into the private diff header. This also allowed me to remove a gross hack in rename/copy detect code where I was overwriting the status field with an internal value.
Russell Belfer 9bc8be3d 2013-02-19T10:25:41 Refine pluggable similarity API This plugs in the three basic similarity strategies for handling whitespace via internal use of the pluggable API. In so doing, I realized that the use of git_buf in the hashsig API was not needed and actually just made it harder to use, so I tweaked that API as well. Note that the similarity metric is still not hooked up in the find_similarity code - this is just setting out the function that will be used.
Russell Belfer a235e9d3 2013-02-15T14:12:43 Pluggable similarity metric API
yorah 0d64ba48 2013-01-25T17:35:46 diff: add a notify callback to `git_diff__from_iterators` The callback will be called for each file, just before the `git_delta_t` gets inserted into the diff list. When the callback: - returns < 0, the diff process will be aborted - returns > 0, the delta will not be inserted into the diff list, but the diff process continues - returns 0, the delta is inserted into the diff list, and the diff process continues
Russell Belfer f1e2735c 2013-01-30T11:10:39 Add helper for diff line stats This adds a `git_diff_patch_line_stats()` API that gets the total number of adds, deletes, and context lines in a patch. This will make it a little easier to emulate `git diff --stat` and the like. Right now, this relies on generating the `git_diff_patch` object, which is a pretty heavyweight way to get stat information. At some future point, it would probably be nice to be able to get this information without allocating the entire `git_diff_patch`, but that's a much larger project.
Edward Thomson 359fc2d2 2013-01-08T17:07:25 update copyrights
Russell Belfer f2b7f7a6 2013-01-07T15:44:22 Share git_diff_blobs/git_diff_blob_to_buffer code This moves the implementation of these two APIs into common code that will be shared between the two. Also, this adds tests for the `git_diff_blob_to_buffer` API. Lastly, this adds some extra `const` to a few places that can use it.
Ignacio Casal Quinteiro f6234cd9 2012-12-21T20:57:43 Introduce git_diff_blob_to_buffer
Kevin Sawicki 7eb222fc 2013-01-06T10:39:35 Correct typos in documentation
Russell Belfer ba084f7a 2012-12-17T11:03:42 More diff.h comment fixes Based on feedback from the ObjectiveGit folks, these are some further updates to diff.h areas that are poorly documented.
Russell Belfer 56c72b75 2012-12-17T11:00:53 Fix diff constructor name order confusion The diff constructor functions had some confusing names, where the "old" side of the diff was coming after the "new" side. This reverses the order in the function name to make it less confusing. Specifically... * git_diff_index_to_tree becomes git_diff_tree_to_index * git_diff_workdir_to_index becomes git_diff_index_to_workdir * git_diff_workdir_to_tree becomes git_diff_tree_to_workdir
Ben Straub fac43c54 2012-12-06T19:41:52 Allow compilation as C++
Russell Belfer 32770c52 2012-12-05T13:56:32 Fix diff header comments and missing const Based on the recent work to wrap diff in objective-git, this includes a fix for a missing const and a number of clarifications of the documentation.
Ben Straub 7bcfbe16 2012-11-30T20:35:01 Make constant name all-caps
Ben Straub 2f8d30be 2012-11-29T15:05:04 Deploy GIT_DIFF_OPTIONS_INIT
Ben Straub bde336ea 2012-11-29T12:26:09 Add version fields and init macros for public input structs.
Russell Belfer 793c4385 2012-11-20T16:36:06 Update diff callback param order This makes the diff functions that take callbacks both take the payload parameter after the callback function pointers and pass the payload as the last argument to the callback function instead of the first. This should make them consistent with other callbacks across the API.
Vicent Marti cfbe4be3 2012-11-17T19:54:47 More external API cleanup Conflicts: src/branch.c tests-clar/refs/branches/create.c
Vicent Martí 4a0c7f56 2012-11-15T10:31:11 Merge pull request #1074 from edubart/ignore_diff_filemode Add option to ignore file mode in diffs
Eduardo Bart c0d5acf6 2012-11-15T14:43:21 Add option to ignore file mode in diffs
Russell Belfer bbe6dbec 2012-11-14T23:29:48 Add explicit git_index ptr to diff and checkout A number of diff APIs and the `git_checkout_index` API take a `git_repository` object an operate on the index. This updates them to take a `git_index` pointer explicitly and only fall back on the `git_repository` index if the index input is NULL. This makes it easier to operate on a temporary index.
Russell Belfer 5735bf5e 2012-11-13T13:58:29 Fix diff API to better parameter order The diff API is not in the parameter order one would expect from other libgit2 APIs. This fixes that.
Vicent Martí 1362a983 2012-11-02T10:00:28 Merge pull request #1014 from arrbee/diff-rename-detection Initial implementation of diff rename detection
Russell Belfer db106d01 2012-10-30T09:40:50 Move rename detection into new file This improves the naming for the rename related functionality moving it to be called `git_diff_find_similar()` and renaming all the associated constants, etc. to make more sense. I also moved the new code (plus the existing `git_diff_merge`) into a new file `diff_tform.c` where I can put new functions related to manipulating git diff lists. This also updates the implementation significantly from the last revision fixing some ordering issues (where break-rewrite needs to be handled prior to copy and rename detection) and improving config option handling.
Russell Belfer cb7180a6 2012-10-25T11:48:39 Add git_diff_patch_print This adds a `git_diff_patch_print()` API which is more like the existing API to "print" a patch from an entire `git_diff_list` but operates on a single `git_diff_patch` object. Also, it rewrites the `git_diff_patch_to_str()` API to use that function (making it very small).
Russell Belfer 93cf7bb8 2012-10-24T20:56:32 Add git_diff_patch_to_str API This adds an API to generate a complete single-file patch text from a git_diff_patch object.
Russell Belfer b4f5bb07 2012-10-23T16:40:51 Initial implementation of diff rename detection This implements the basis for diff rename and copy detection, although it is based on simple SHA comparison right now instead of using a matching algortihm. Just as `git_diff_merge` can be used as a post-pass on diffs to emulate certain command line behaviors, there is a new API `git_diff_detect` which will update a diff list in-place, adjusting some deltas to RENAMED or COPIED state (and also, eventually, splitting MODIFIED deltas where the change is too large into DELETED/ADDED pairs). This also adds a new test repo that will hold rename/copy/split scenarios. Right now, it just has exact-match rename and copy, but the tests are written to use tree diffs, so we should be able to add new test scenarios easily without breaking tests.
Russell Belfer fe67e404 2012-10-09T14:35:24 Move enum comments next to actual values
Russell Belfer 0d64bef9 2012-10-05T15:56:57 Add complex checkout test and then fix checkout This started as a complex new test for checkout going through the "typechanges" test repository, but that revealed numerous issues with checkout, including: * complete failure with submodules * failure to create blobs with exec bits * problems when replacing a tree with a blob because the tree "example/" sorts after the blob "example" so the delete was being processed after the single file blob was created This fixes most of those problems and includes a number of other minor changes that made it easier to do that, including improving the TYPECHANGE support in diff/status, etc.
Russell Belfer 95f5f1e6 2012-10-02T13:57:15 Cleanup TYPECHANGE support This is just some cleanup code, rearranging some of the checkout code where TYPECHANGE support was added and adding some comments to the diff header regarding the constants.
Russell Belfer bc16fd3e 2012-09-28T13:40:02 Introduce status/diff TYPECHANGE flags When I wrote the diff code, I based it on core git's diff output which tends to split a type change into an add and a delete. But core git's status has the notion of a T (typechange) flag for a file. This introduces that into our status APIs and modifies the diff code so it can be forced to not split type changes.
Russell Belfer dfbff793 2012-10-08T15:14:12 Fix a few diff bugs with directory content There are a few cases where diff should leave directories in the diff list if we want to match core git, such as when the directory contains a .git dir. That feature was lost when I introduced some of the new submodule handling. This restores that and then fixes a couple of related to diff output that are triggered by having diffs with directories in them. Also, this adds a new flag that can be passed to diff if you want diff output to actually include the file content of any untracked files.
Russell Belfer eada0762 2012-10-02T10:45:40 Merge pull request #939 from pwkelley/ignorecase Support for the core.ignorecase flag
Russell Belfer bae957b9 2012-09-25T16:31:46 Add const to all shared pointers in diff API There are a lot of places where the diff API gives the user access to internal data structures and many of these were being exposed through non-const pointers. This replaces them all with const pointers for any object that the user can access but is still owned internally to the git_diff_list or git_diff_patch objects. This will probably break some bindings... Sorry!
Russell Belfer 64286308 2012-09-25T10:48:50 Fix bugs in new diff patch code This fixes all the bugs in the new diff patch code. The only really interesting one is that when we merge two diffs, we now have to actually exclude diff delta records that are not supposed to be tracked, as opposed to before where they could be included because they would be skipped silently by `git_diff_foreach()`. Other than that, there are just minor errors.
Russell Belfer 5f69a31f 2012-09-24T20:52:34 Initial implementation of new diff patch API Replacing the `git_iterator` object, this creates a simple API for accessing the "patch" for any file pair in a diff list and then gives indexed access to the hunks in the patch and the lines in the hunk. This is the initial implementation of this revised API - it is still broken, but at least builds cleanly.
Russell Belfer 9a12a625 2012-09-18T15:13:07 New take on iterating over diff content Allow diff deltas to be accessed by index and make patch generation explicit with hunk and line access by index as well.
Philip Kelley ec40b7f9 2012-09-17T15:42:41 Support for core.ignorecase
Russell Belfer 1f35e89d 2012-09-11T12:03:33 Fix diff binary file detection In the process of adding tests for the max file size threshold (which treats files over a certain size as binary) there seem to be a number of problems in the new code with detecting binaries. This should fix those up, as well as add a test for the file size threshold stuff. Also, this un-deprecates `GIT_DIFF_LINE_ADD_EOFNL`, since I finally found a legitimate situation where it would be returned.
Russell Belfer e597b189 2012-09-10T11:49:12 Move diff max_size to public API This commit adds a max_size value in the public `git_diff_options` structure so that the user can automatically flag blobs over a certain size as binary regardless of other properties. Also, and perhaps more importantly, this moves binary detection to be as early as possible in the diff traversal inner loop and makes sure that we stop loading objects as soon as we decide that they are binary.
Russell Belfer b36effa2 2012-09-10T09:59:14 Replace git_diff_iterator_num_files with progress The `git_diff_iterator_num_files` API was problematic, since we don't actually know the exact number of files to be iterated over until we load those files into memory. This replaces it with a new `git_diff_iterator_progress` API that goes from 0 to 1, and moves and renamed the old API for the internal places that can tolerate a max value instead of an exact value.
Russell Belfer 8f9b6a13 2012-08-31T16:39:30 Better header comments
Vicent Marti 01ae1909 2012-09-06T10:13:38 diff: Cleanup documentation and printf compat
Russell Belfer 510f1bac 2012-08-30T16:39:05 Fix comments and a minor bug This adds better header comments and also fixes a bug in one of simple APIs that tells the number of lines in the current hunk.
Russell Belfer f335ecd6 2012-08-30T14:24:16 Diff iterators This refactors the diff output code so that an iterator object can be used to traverse and generate the diffs, instead of just the `foreach()` style with callbacks. The code has been rearranged so that the two styles can still share most functions. This also replaces `GIT_REVWALKOVER` with `GIT_ITEROVER` and uses that as a common error code for marking the end of iteration when using a iterator style of object.
Russell Belfer 5f4a61ae 2012-08-09T19:43:25 Working implementation of git_submodule_status This is a big redesign of the git_submodule_status API and the implementation of the redesigned API. It also fixes a number of bugs that I found in other parts of the submodule API while writing the tests for the status part. This also fixes a couple of bugs in the iterators that had not been noticed before - one with iterating when there is a gitlink (i.e. separate-work-dir) and one where I was treating anything even vaguely submodule-like as a submodule, more aggressively than core git does.
Russell Belfer 5dca2010 2012-08-03T17:08:01 Update iterators for consistency across library This updates all the `foreach()` type functions across the library that take callbacks from the user to have a consistent behavior. The rules are: * A callback terminates the loop by returning any non-zero value * Once the callback returns non-zero, it will not be called again (i.e. the loop stops all iteration regardless of state) * If the callback returns non-zero, the parent fn returns GIT_EUSER * Although the parent returns GIT_EUSER, no error will be set in the library and `giterr_last()` will return NULL if called. This commit makes those changes across the library and adds tests for most of the iteration APIs to make sure that they follow the above rules.
yorah a1773f9d 2012-07-23T18:16:09 Add flag to turn off pathspec testing for diff and status
yorah 29f9186d 2012-07-02T11:18:01 diff: make inter-hunk-context default value git-compliant Default in git core is 0, not 3
Russell Belfer 145e696b 2012-06-08T11:56:24 Minor fixes, cleanups, and clarifications There are three actual changes in this commit: 1. When the trailing newline of a file is removed in a diff, the change will now be reported with `GIT_DIFF_LINE_DEL_EOFNL` passed to the callback. Previously, the `ADD_EOFNL` constant was given which was just an error in my understanding of when the various circumstances arose. `GIT_DIFF_LINE_ADD_EOFNL` is deprecated and should never be generated. A new newline is simply an `ADD`. 2. Rewrote the `diff_delta__merge_like_cgit` function that contains the core logic of the `git_diff_merge` implementation. The new version doesn't actually have significantly different behavior, but the logic should be much more obvious, I think. 3. Fixed a bug in `git_diff_merge` where it freed a string pool while some of the string data was still in use. This led to `git_diff_print_patch` accessing memory that had been freed. The rest of this commit contains improved documentation in `diff.h` to make the behavior and the equivalencies with core git clearer, and a bunch of new tests to cover the various cases, oh and a minor simplification of `examples/diff.c`.
Vicent Martí 3f035860 2012-06-07T22:43:03 misc: Fix warnings from PVS Studio trial
Bruce Mitchener d73c94b2 2012-05-19T20:24:55 Fix spelling errors.
nulltoken d1c4312a 2012-05-03T22:21:08 diff: improve git_diff_blobs() documentation
nulltoken 28ef7f9b 2012-05-03T17:25:01 diff: make git_diff_blobs() able to detect binary blobs
Vicent Martí 40879fac 2012-05-02T15:59:02 Merge branch 'new-error-handling' into development Conflicts: .travis.yml include/git2/diff.h src/config_file.c src/diff.c src/diff_output.c src/mwindow.c src/path.c tests-clar/clar_helpers.c tests-clar/object/tree/frompath.c tests/t00-core.c tests/t03-objwrite.c tests/t08-tag.c tests/t10-refs.c tests/t12-repo.c tests/t18-status.c tests/test_helpers.c tests/test_main.c
Russell Belfer 16b83019 2012-03-04T23:28:36 Fix usage of "new" for fieldname in public header This should restore the ability to include libgit2 headers in C++ projects. Cherry picked 2de60205dfea2c4a422b2108a5e8605f97c2e895 from development into new-error-handling.
nulltoken 1d2dd864 2012-04-29T19:42:51 diff: provide more context to the consumer of the callbacks Update the callback to provide some information related to the file change being processed and the range of the hunk, when applicable.
Russell Belfer 4b136a94 2012-03-23T09:26:09 Fix crash in new status and add recurse option This fixes the bug that @nulltoken found (thank you!) where if there were untracked directories alphabetically after the last tracked item, the diff implementation would deref a NULL pointer. The fix involved the code which decides if it is necessary to recurse into a directory in the working dir, so it was easy to add a new option `GIT_STATUS_OPT_RECURSE_UNTRACKED_DIRS` to control if the contents of untracked directories should be included in status.
Russell Belfer 66142ae0 2012-03-22T10:44:36 New status fixes This adds support for roughly-right tracking of submodules (although it does not recurse into submodules to detect internal modifications a la core git), and it adds support for including unmodified files in diff iteration if requested.
schu 7826d577 2012-03-21T10:00:54 diff_output: remove unused parameter Signed-off-by: schu <schu-github@schulog.org>
Russell Belfer 2de60205 2012-03-04T23:28:36 Fix usage of "new" for fieldname in public header This should restore the ability to include libgit2 headers in C++ projects.
Russell Belfer e1bcc191 2012-03-01T11:45:00 Revert GIT_STATUS constants to avoid issues This reverts the changes to the GIT_STATUS constants and adds a new enumeration to describe the type of change in a git_diff_delta. I don't love this solution, but it should prevent strange errors from occurring for now. Eventually, I would like to unify the various status constants, but it needs a larger plan and I just wanted to eliminate this breakage quickly.
Russell Belfer 74fa4bfa 2012-02-28T16:14:47 Update diff to use iterators This is a major reorganization of the diff code. This changes the diff functions to use the iterators for traversing the content. This allowed a lot of code to be simplified. Also, this moved the functions relating to outputting a diff into a new file (diff_output.c). This includes a number of other changes - adding utility functions, extending iterators, etc. plus more tests for the diff code. This also takes the example diff.c program much further in terms of emulating git-diff command line options.
Russell Belfer a2e895be 2012-02-07T12:14:28 Continue implementation of git-diff * Implemented git_diff_index_to_tree * Reworked git_diff_options structure to handle more options * Made most of the options in git_diff_options actually work * Reorganized code a bit to remove some redundancy * Added option parsing to examples/diff.c to test most options
Russell Belfer 65b09b1d 2012-02-02T18:03:43 Implement diff lists and formatters This reworks the diff API to separate the steps of producing a diff descriptions from formatting the diff. This will allow us to share diff output code with the various diff creation scenarios and will allow us to implement rename detection as an optional pass that can be run on a diff list.
Russell Belfer cd33323b 2012-01-27T11:29:25 Initial implementation of git_diff_blob This gets the basic plumbing in place for git_diff_blob. There is a known issue where additional parameters like the number of lines of context to display on the diff are not working correctly (which leads one of the new unit tests to fail).
Russell Belfer 3a437590 2012-02-03T16:53:01 Clean up diff implementation for review This fixes several bugs, updates tests and docs, eliminates the FILE* assumption in favor of printing callbacks for the diff patch formatter helpers, and adds a "diff" example function that can perform a diff from the command line.