From 5d93460024541909337d6b08a8bec10b71caaf73 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=86var=20Arnfj=C3=B6r=C3=B0=20Bjarmason?= Date: Mon, 12 Apr 2021 19:15:29 +0200 Subject: [PATCH] xdiff-interface: replace discard_hunk_line() with a flag MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Remove the dummy discard_hunk_line() function added in 3b40a090fd4 (diff: avoid generating unused hunk header lines, 2018-11-02) in favor of having a new XDL_EMIT_NO_HUNK_HDR flag, for use along with the two existing and similar XDL_EMIT_* flags. Unlike the recently amended xdiff_emit_line_fn interface which'll be called in a loop in xdl_emit_diff(), the hunk header is only emitted once. It makes more sense to pass this as a flag than provide a dummy callback because that function may be able to skip doing certain work if it knows the caller is doing nothing with the hunk header. It would be possible to do so in the case of -U0 now, but the benefit of doing so is so small that I haven't bothered. But this leaves the door open to that, and more importantly makes the API use more intuitive. The reason we're putting a flag in the gap between 1<<0 and 1<<2 is that the old 1<<1 flag was removed in 907681e940d (xdiff: drop XDL_EMIT_COMMON, 2016-02-23) without re-ordering the remaining flags. Signed-off-by: Ævar Arnfjörð Bjarmason Signed-off-by: Junio C Hamano --- diff.c | 7 ++++--- diffcore-pickaxe.c | 3 ++- xdiff-interface.c | 6 ------ xdiff-interface.h | 8 -------- xdiff/xdiff.h | 1 + xdiff/xemit.c | 3 ++- 6 files changed, 9 insertions(+), 19 deletions(-) diff --git a/diff.c b/diff.c index 7a03c581c7..fe3abac79f 100644 --- a/diff.c +++ b/diff.c @@ -3725,7 +3725,8 @@ static void builtin_diffstat(const char *name_a, const char *name_b, xpp.anchors_nr = o->anchors_nr; xecfg.ctxlen = o->context; xecfg.interhunkctxlen = o->interhunkcontext; - if (xdi_diff_outf(&mf1, &mf2, discard_hunk_line, + xecfg.flags = XDL_EMIT_NO_HUNK_HDR; + if (xdi_diff_outf(&mf1, &mf2, NULL, diffstat_consume, diffstat, &xpp, &xecfg)) die("unable to generate diffstat for %s", one->path); @@ -6233,8 +6234,8 @@ static int diff_get_patch_id(struct diff_options *options, struct object_id *oid xpp.flags = 0; xecfg.ctxlen = 3; - xecfg.flags = 0; - if (xdi_diff_outf(&mf1, &mf2, discard_hunk_line, + xecfg.flags = XDL_EMIT_NO_HUNK_HDR; + if (xdi_diff_outf(&mf1, &mf2, NULL, patch_id_consume, &data, &xpp, &xecfg)) return error("unable to generate patch-id diff for %s", p->one->path); diff --git a/diffcore-pickaxe.c b/diffcore-pickaxe.c index 96183f4cfa..c88e50c632 100644 --- a/diffcore-pickaxe.c +++ b/diffcore-pickaxe.c @@ -53,6 +53,7 @@ static int diff_grep(mmfile_t *one, mmfile_t *two, memset(&xecfg, 0, sizeof(xecfg)); ecbdata.regexp = regexp; ecbdata.hit = 0; + xecfg.flags = XDL_EMIT_NO_HUNK_HDR; xecfg.ctxlen = o->context; xecfg.interhunkctxlen = o->interhunkcontext; @@ -60,7 +61,7 @@ static int diff_grep(mmfile_t *one, mmfile_t *two, * An xdiff error might be our "data->hit" from above. See the * comment for xdiff_emit_line_fn in xdiff-interface.h */ - ret = xdi_diff_outf(one, two, discard_hunk_line, diffgrep_consume, + ret = xdi_diff_outf(one, two, NULL, diffgrep_consume, &ecbdata, &xpp, &xecfg); if (ecbdata.hit) return 1; diff --git a/xdiff-interface.c b/xdiff-interface.c index 50c0ef759d..95f13a93ff 100644 --- a/xdiff-interface.c +++ b/xdiff-interface.c @@ -126,12 +126,6 @@ int xdi_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, xdemitconf_t co return xdl_diff(&a, &b, xpp, xecfg, xecb); } -void discard_hunk_line(void *priv, - long ob, long on, long nb, long nn, - const char *func, long funclen) -{ -} - int xdi_diff_outf(mmfile_t *mf1, mmfile_t *mf2, xdiff_emit_hunk_fn hunk_fn, xdiff_emit_line_fn line_fn, diff --git a/xdiff-interface.h b/xdiff-interface.h index 3b6819586d..4301a7eef2 100644 --- a/xdiff-interface.h +++ b/xdiff-interface.h @@ -53,14 +53,6 @@ void xdiff_clear_find_func(xdemitconf_t *xecfg); int git_xmerge_config(const char *var, const char *value, void *cb); extern int git_xmerge_style; -/* - * Can be used as a no-op hunk_fn for xdi_diff_outf(), since a NULL - * one just sends the hunk line to the line_fn callback). - */ -void discard_hunk_line(void *priv, - long ob, long on, long nb, long nn, - const char *func, long funclen); - /* * Compare the strings l1 with l2 which are of size s1 and s2 respectively. * Returns 1 if the strings are deemed equal, 0 otherwise. diff --git a/xdiff/xdiff.h b/xdiff/xdiff.h index 7a04605146..b29deca5de 100644 --- a/xdiff/xdiff.h +++ b/xdiff/xdiff.h @@ -50,6 +50,7 @@ extern "C" { /* xdemitconf_t.flags */ #define XDL_EMIT_FUNCNAMES (1 << 0) +#define XDL_EMIT_NO_HUNK_HDR (1 << 1) #define XDL_EMIT_FUNCCONTEXT (1 << 2) /* merge simplification levels */ diff --git a/xdiff/xemit.c b/xdiff/xemit.c index 9d7d6c5087..1cbf2b9829 100644 --- a/xdiff/xemit.c +++ b/xdiff/xemit.c @@ -278,7 +278,8 @@ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, s1 - 1, funclineprev); funclineprev = s1 - 1; } - if (xdl_emit_hunk_hdr(s1 + 1, e1 - s1, s2 + 1, e2 - s2, + if (!(xecfg->flags & XDL_EMIT_NO_HUNK_HDR) && + xdl_emit_hunk_hdr(s1 + 1, e1 - s1, s2 + 1, e2 - s2, func_line.buf, func_line.len, ecb) < 0) return -1;