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From: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
To: git@vger.kernel.org
Cc: "Junio C Hamano" <gitster@pobox.com>, "Jeff King" <peff@peff.net>,
	"Johannes Schindelin" <johannes.schindelin@gmx.de>,
	"Carlo Marcelo Arenas Belón" <carenas@gmail.com>,
	"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Subject: [PATCH v3 12/22] pickaxe: refactor function selection in diffcore-pickaxe()
Date: Mon, 12 Apr 2021 19:15:19 +0200	[thread overview]
Message-ID: <patch-12.22-c29deb428b1-20210412T170457Z-avarab@gmail.com> (raw)
In-Reply-To: <cover-00.22-00000000000-20210412T170457Z-avarab@gmail.com>

It's hard to read this codepath at a glance and reason about exactly
what combination of -G and -S will compile either regexes or kwset,
and whether we'll then dispatch to "diff_grep" or "has_changes".

Then in the "--find-object" case we aren't using the callback
function, but were previously passing down "has_changes".

Refactor this code to exhaustively check "opts", it's now more obvious
what callback function (or none) we want under what mode.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 diffcore-pickaxe.c | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/diffcore-pickaxe.c b/diffcore-pickaxe.c
index a278b9b71d9..953b6ec1b4a 100644
--- a/diffcore-pickaxe.c
+++ b/diffcore-pickaxe.c
@@ -228,6 +228,7 @@ void diffcore_pickaxe(struct diff_options *o)
 	int opts = o->pickaxe_opts;
 	regex_t regex, *regexp = NULL;
 	kwset_t kws = NULL;
+	pickaxe_fn fn;
 
 	if (opts & (DIFF_PICKAXE_REGEX | DIFF_PICKAXE_KIND_G)) {
 		int cflags = REG_EXTENDED | REG_NEWLINE;
@@ -235,6 +236,20 @@ void diffcore_pickaxe(struct diff_options *o)
 			cflags |= REG_ICASE;
 		regcomp_or_die(&regex, needle, cflags);
 		regexp = &regex;
+
+		if (opts & DIFF_PICKAXE_KIND_G)
+			fn = diff_grep;
+		else if (opts & DIFF_PICKAXE_REGEX)
+			fn = has_changes;
+		else
+			/*
+			 * We don't need to check the combination of
+			 * -G and --pickaxe-regex, by the time we get
+			 * here diff.c has already died if they're
+			 * combined. See the usage tests in
+			 * t4209-log-pickaxe.sh.
+			 */
+			BUG("unreachable");
 	} else if (opts & DIFF_PICKAXE_KIND_S) {
 		if (o->pickaxe_opts & DIFF_PICKAXE_IGNORE_CASE &&
 		    has_non_ascii(needle)) {
@@ -251,10 +266,14 @@ void diffcore_pickaxe(struct diff_options *o)
 			kwsincr(kws, needle, strlen(needle));
 			kwsprep(kws);
 		}
+		fn = has_changes;
+	} else if (opts & DIFF_PICKAXE_KIND_OBJFIND) {
+		fn = NULL;
+	} else {
+		BUG("unknown pickaxe_opts flag");
 	}
 
-	pickaxe(&diff_queued_diff, o, regexp, kws,
-		(opts & DIFF_PICKAXE_KIND_G) ? diff_grep : has_changes);
+	pickaxe(&diff_queued_diff, o, regexp, kws, fn);
 
 	if (regexp)
 		regfree(regexp);
-- 
2.31.1.639.g3d04783866f


  parent reply	other threads:[~2021-04-12 17:16 UTC|newest]

Thread overview: 99+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-03  3:27 [PATCH 00/25] grep: PCREv2 fixes, remove kwset.[ch] Ævar Arnfjörð Bjarmason
2021-02-03  3:27 ` [PATCH 01/25] grep/pcre2 tests: reword comments referring to kwset Ævar Arnfjörð Bjarmason
2021-02-03  3:27 ` [PATCH 02/25] grep/pcre2: drop needless assignment + assert() on opt->pcre2 Ævar Arnfjörð Bjarmason
2021-02-03  3:27 ` [PATCH 03/25] grep/pcre2: drop needless assignment to NULL Ævar Arnfjörð Bjarmason
2021-02-03  3:27 ` [PATCH 04/25] grep/pcre2: correct reference to grep_init() in comment Ævar Arnfjörð Bjarmason
2021-02-03  3:27 ` [PATCH 05/25] grep/pcre2: prepare to add debugging to pcre2_malloc() Ævar Arnfjörð Bjarmason
2021-02-03  3:27 ` [PATCH 06/25] grep/pcre2: add GREP_PCRE2_DEBUG_MALLOC debug mode Ævar Arnfjörð Bjarmason
2021-02-03  3:27 ` [PATCH 07/25] grep/pcre2: use compile-time PCREv2 version test Ævar Arnfjörð Bjarmason
2021-02-03  3:27 ` [PATCH 08/25] grep/pcre2: use pcre2_maketables_free() function Ævar Arnfjörð Bjarmason
2021-02-03  3:27 ` [PATCH 09/25] grep/pcre2: actually make pcre2 use custom allocator Ævar Arnfjörð Bjarmason
2021-02-03  3:27 ` [PATCH 10/25] grep/pcre2: move back to thread-only PCREv2 structures Ævar Arnfjörð Bjarmason
2021-02-03  3:27 ` [PATCH 11/25] grep/pcre2: move definitions of pcre2_{malloc,free} Ævar Arnfjörð Bjarmason
2021-02-03  3:27 ` [PATCH 12/25] pickaxe tests: refactor to use test_commit --append Ævar Arnfjörð Bjarmason
2021-02-03  3:27 ` [PATCH 13/25] pickaxe -S: support content with NULs under --pickaxe-regex Ævar Arnfjörð Bjarmason
2021-02-03  3:28 ` [PATCH 14/25] pickaxe -S: remove redundant "sz" check in while-loop Ævar Arnfjörð Bjarmason
2021-02-04 16:16   ` René Scharfe
2021-02-04 17:56     ` Junio C Hamano
2021-02-04 21:13       ` Ævar Arnfjörð Bjarmason
2021-02-03  3:28 ` [PATCH 15/25] pickaxe/style: consolidate declarations and assignments Ævar Arnfjörð Bjarmason
2021-02-03  3:28 ` [PATCH 16/25] pickaxe tests: add test for diffgrep_consume() internals Ævar Arnfjörð Bjarmason
2021-02-03  3:28 ` [PATCH 17/25] pickaxe tests: add test for "log -S" not being a regex Ævar Arnfjörð Bjarmason
2021-02-03  3:28 ` [PATCH 18/25] perf: add performance test for pickaxe Ævar Arnfjörð Bjarmason
2021-02-03  3:28 ` [PATCH 19/25] pickaxe -G: set -U0 for diff generation Ævar Arnfjörð Bjarmason
2021-02-03 14:26   ` Ævar Arnfjörð Bjarmason
2021-02-03 19:42     ` Junio C Hamano
2021-02-03  3:28 ` [PATCH 20/25] grep.h: make patmatch() a public function Ævar Arnfjörð Bjarmason
2021-02-03  3:28 ` [PATCH 21/25] pickaxe: use PCREv2 for -G and -S Ævar Arnfjörð Bjarmason
2021-02-03 20:44   ` Ævar Arnfjörð Bjarmason
2021-02-04 18:11     ` Junio C Hamano
2021-02-04 18:22   ` Junio C Hamano
2021-02-03  3:28 ` [PATCH 22/25] Remove unused kwset.[ch] Ævar Arnfjörð Bjarmason
     [not found]   ` <CAPUEspgBmuTBHVZWY9fRtjbHWBRr0zHravLL1Czepc6jmib4HA@mail.gmail.com>
2021-02-03 14:13     ` Ævar Arnfjörð Bjarmason
     [not found]       ` <CAPUEsphN7QuSVsC1Tr4xE8yQgPTtpF7wL7zbk1crQU3n-5g6JQ@mail.gmail.com>
2021-02-03 16:45         ` Ævar Arnfjörð Bjarmason
2021-02-03  3:28 ` [PATCH 23/25] xdiff-interface: allow early return from xdiff_emit_{line,hunk}_fn Ævar Arnfjörð Bjarmason
2021-02-03  3:28 ` [PATCH 24/25] xdiff-interface: support early exit in xdiff_outf() Ævar Arnfjörð Bjarmason
2021-02-04 18:16   ` Junio C Hamano
2021-02-03  3:28 ` [PATCH 25/25] pickaxe -G: terminate early on matching lines Ævar Arnfjörð Bjarmason
2021-02-03 12:38 ` [PATCH 00/25] grep: PCREv2 fixes, remove kwset.[ch] Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 00/22] pickaxe: test and refactoring for follow-up changes Ævar Arnfjörð Bjarmason
2021-02-16 22:23   ` Junio C Hamano
2021-02-17  1:19     ` Junio C Hamano
2021-04-12 17:15   ` [PATCH v3 00/22] pickaxe: test and refactoring for future PCRE backend Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 01/22] grep/pcre2 tests: reword comments referring to kwset Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 02/22] pickaxe tests: refactor to use test_commit --append --printf Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 03/22] pickaxe tests: add test for diffgrep_consume() internals Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 04/22] pickaxe tests: add test for "log -S" not being a regex Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 05/22] pickaxe tests: test for -G, -S and --find-object incompatibility Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 06/22] pickaxe tests: add missing test for --no-pickaxe-regex being an error Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 07/22] pickaxe: die when -G and --pickaxe-regex are combined Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 08/22] pickaxe: die when --find-object and --pickaxe-all " Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 09/22] diff.h: move pickaxe fields together again Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 10/22] pickaxe/style: consolidate declarations and assignments Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 11/22] perf: add performance test for pickaxe Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` Ævar Arnfjörð Bjarmason [this message]
2021-04-12 17:15     ` [PATCH v3 13/22] pickaxe: assert that we must have a needle under -G or -S Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 14/22] pickaxe -S: support content with NULs under --pickaxe-regex Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 15/22] pickaxe: rename variables in has_changes() for brevity Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 16/22] pickaxe -S: slightly optimize contains() Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 17/22] xdiff-interface: prepare for allowing early return Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 18/22] xdiff-interface: allow early return from xdiff_emit_line_fn Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 19/22] pickaxe -G: terminate early on matching lines Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 20/22] pickaxe -G: don't special-case create/delete Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 21/22] xdiff users: use designated initializers for out_line Ævar Arnfjörð Bjarmason
2021-04-12 17:15     ` [PATCH v3 22/22] xdiff-interface: replace discard_hunk_line() with a flag Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 01/22] grep/pcre2 tests: reword comments referring to kwset Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 02/22] test-lib-functions: document and test test_commit --no-tag Ævar Arnfjörð Bjarmason
2021-03-30 23:14   ` Junio C Hamano
2021-02-16 11:57 ` [PATCH v2 03/22] test-lib-functions: reword "test_commit --append" docs Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 04/22] test-lib functions: add --printf option to test_commit Ævar Arnfjörð Bjarmason
2021-03-30 23:11   ` Junio C Hamano
2021-04-12 13:19     ` Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 05/22] pickaxe tests: refactor to use test_commit --append --printf Ævar Arnfjörð Bjarmason
2021-03-30 23:26   ` Junio C Hamano
2021-02-16 11:57 ` [PATCH v2 06/22] pickaxe tests: add test for diffgrep_consume() internals Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 07/22] pickaxe tests: add test for "log -S" not being a regex Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 08/22] pickaxe tests: test for -G, -S and --find-object incompatibility Ævar Arnfjörð Bjarmason
2021-03-30 23:32   ` Junio C Hamano
2021-02-16 11:57 ` [PATCH v2 09/22] pickaxe: die when -G and --pickaxe-regex are combined Ævar Arnfjörð Bjarmason
2021-03-30 23:36   ` Junio C Hamano
2021-02-16 11:57 ` [PATCH v2 10/22] pickaxe: die when --find-object and --pickaxe-all " Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 11/22] diff.h: move pickaxe fields together again Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 12/22] pickaxe/style: consolidate declarations and assignments Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 13/22] perf: add performance test for pickaxe Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 14/22] pickaxe: refactor function selection in diffcore-pickaxe() Ævar Arnfjörð Bjarmason
2021-03-30 23:45   ` Junio C Hamano
2021-02-16 11:57 ` [PATCH v2 15/22] pickaxe: assert that we must have a needle under -G or -S Ævar Arnfjörð Bjarmason
2021-03-30 23:50   ` Junio C Hamano
2021-02-16 11:57 ` [PATCH v2 16/22] pickaxe -S: support content with NULs under --pickaxe-regex Ævar Arnfjörð Bjarmason
2021-03-30 23:54   ` Junio C Hamano
2021-02-16 11:57 ` [PATCH v2 17/22] pickaxe: rename variables in has_changes() for brevity Ævar Arnfjörð Bjarmason
2021-02-16 11:57 ` [PATCH v2 18/22] pickaxe -S: slightly optimize contains() Ævar Arnfjörð Bjarmason
2021-03-30 23:58   ` Junio C Hamano
2021-02-16 11:57 ` [PATCH v2 19/22] xdiff-interface: allow early return from xdiff_emit_{line,hunk}_fn Ævar Arnfjörð Bjarmason
2021-03-31  0:04   ` Junio C Hamano
2021-02-16 11:57 ` [PATCH v2 20/22] xdiff-interface: support early exit in xdiff_outf() Ævar Arnfjörð Bjarmason
2021-02-16 11:58 ` [PATCH v2 21/22] pickaxe -G: terminate early on matching lines Ævar Arnfjörð Bjarmason
2021-03-31  0:11   ` Junio C Hamano
2021-02-16 11:58 ` [PATCH v2 22/22] pickaxe -G: don't special-case create/delete Ævar Arnfjörð Bjarmason
2021-03-31  0:14   ` Junio C Hamano

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