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| author |  Jeff King <peff@peff.net> | 2018-11-02 02:39:40 -0400 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2018-11-05 13:14:35 +0900 |
| commit | d2eb80935a4e93cd775b5e8dc3f07fa1cd21d330 (patch) | |
| tree | 1b0e3d7c9a93107e978c3a7a2eacfed8316612b5 | |
| parent | diff: convert --check to use a hunk callback (diff) | |
| download | tgif-d2eb80935a4e93cd775b5e8dc3f07fa1cd21d330.tar.xz | |
range-diff: use a hunk callback
When we count the lines in a diff, we don't actually care about the
contents of each line. By using a hunk callback, we tell xdiff that it
does not need to even bother generating a hunk header line, saving a
small amount of work.
Arguably we could even ignore the hunk headers completely, since we're
just computing a cost function between patches. But doing it this way
maintains the exact same behavior before and after.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
| -rw-r--r-- | range-diff.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/range-diff.c b/range-diff.c index 0f4ce140dc..2ef372bbac 100644 --- a/range-diff.c +++ b/range-diff.c @@ -177,6 +177,12 @@ static void diffsize_consume(void *data, char *line, unsigned long len) (*(int *)data)++; } +static void diffsize_hunk(void *data, long ob, long on, long nb, long nn, + const char *funcline, long funclen) +{ + diffsize_consume(data, NULL, 0); +} + static int diffsize(const char *a, const char *b) { xpparam_t pp = { 0 }; @@ -190,7 +196,9 @@ static int diffsize(const char *a, const char *b) mf2.size = strlen(b); cfg.ctxlen = 3; - if (!xdi_diff_outf(&mf1, &mf2, NULL, diffsize_consume, &count, &pp, &cfg)) + if (!xdi_diff_outf(&mf1, &mf2, + diffsize_hunk, diffsize_consume, &count, + &pp, &cfg)) return count; error(_("failed to generate diff")); |