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2024-12-06diff.h: fix index used to loop through unsigned integerPatrick Steinhardt
The `struct diff_flags` structure is essentially an array of flags, all of which have the same type. We can thus use `sizeof()` to iterate through all of the flags, which we do in `diff_flags_or()`. But while the statement returns an unsigned integer, we used a signed integer to iterate through the flags, which generates a warning. Fix this by using `size_t` for the index instead. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-12-06global: mark code units that generate warnings with `-Wsign-compare`Patrick Steinhardt
Mark code units that generate warnings with `-Wsign-compare`. This allows for a structured approach to get rid of all such warnings over time in a way that can be easily measured. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-09-30diff: improve lifecycle management of diff queuesPatrick Steinhardt
The lifecycle management of diff queues is somewhat confusing: - For most of the part this can be attributed to `DIFF_QUEUE_CLEAR()`, which does not release any memory but rather initializes the queue, only. This is in contrast to our common naming schema, where "clearing" means that we release underlying memory and then re-initialize the data structure such that it is ready to use. - A second offender is `diff_free_queue()`, which does not free the queue structure itself. It is rather a release-style function. Refactor the code to make things less confusing. `DIFF_QUEUE_CLEAR()` is replaced by `DIFF_QUEUE_INIT` and `diff_queue_init()`, while `diff_free_queue()` is replaced by `diff_queue_release()`. While on it, adapt callsites where we call `DIFF_QUEUE_CLEAR()` with the intent to release underlying memory to instead call `diff_queue_clear()` to fix memory leaks. This memory leak is exposed by t4211, but plugging it alone does not make the whole test suite pass. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23treewide: replace cache.h with more direct headers, where possibleElijah Newren
Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-02-16diff: --{rotate,skip}-to=<path>Junio C Hamano
In the implementation of "git difftool", there is a case where the user wants to start viewing the diffs at a specific path and continue on to the rest, optionally wrapping around to the beginning. Since it is somewhat cumbersome to implement such a feature as a post-processing step of "git diff" output, let's support it internally with two new options. - "git diff --rotate-to=C", when the resulting patch would show paths A B C D E without the option, would "rotate" the paths to shows patch to C D E A B instead. It is an error when there is no patch for C is shown. - "git diff --skip-to=C" would instead "skip" the paths before C, and shows patch to C D E. Again, it is an error when there is no patch for C is shown. - "git log [-p]" also accepts these two options, but it is not an error if there is no change to the specified path. Instead, the set of output paths are rotated or skipped to the specified path or the first path that sorts after the specified path. Signed-off-by: Junio C Hamano <gitster@pobox.com>