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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 v2 06/10] grep/pcre2: use compile-time PCREv2 version test
Date: Thu, 18 Feb 2021 01:07:24 +0100	[thread overview]
Message-ID: <20210218000728.13995-7-avarab@gmail.com> (raw)
In-Reply-To: <20210204210556.25242-1-avarab@gmail.com>

Replace a use of pcre2_config(PCRE2_CONFIG_VERSION, ...) which I added
in 95ca1f987ed (grep/pcre2: better support invalid UTF-8 haystacks,
2021-01-24) with the same test done at compile-time.

It might be cuter to do this at runtime since we don't have to do the
"major >= 11 || (major >= 10 && ...)" test. But in the next commit
we'll add another version comparison that absolutely needs to be done
at compile-time, so we're better of being consistent across the board.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 grep.c | 18 ++++--------------
 grep.h |  3 +++
 2 files changed, 7 insertions(+), 14 deletions(-)

diff --git a/grep.c b/grep.c
index 7d262a23d88..e58044474dc 100644
--- a/grep.c
+++ b/grep.c
@@ -400,21 +400,11 @@ static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt
 	    !(!opt->ignore_case && (p->fixed || p->is_fixed)))
 		options |= (PCRE2_UTF | PCRE2_MATCH_INVALID_UTF);
 
+#ifdef GIT_PCRE2_VERSION_10_36_OR_HIGHER
 	/* Work around https://bugs.exim.org/show_bug.cgi?id=2642 fixed in 10.36 */
-	if (PCRE2_MATCH_INVALID_UTF && options & (PCRE2_UTF | PCRE2_CASELESS)) {
-		struct strbuf buf;
-		int len;
-		int err;
-
-		if ((len = pcre2_config(PCRE2_CONFIG_VERSION, NULL)) < 0)
-			BUG("pcre2_config(..., NULL) failed: %d", len);
-		strbuf_init(&buf, len + 1);
-		if ((err = pcre2_config(PCRE2_CONFIG_VERSION, buf.buf)) < 0)
-			BUG("pcre2_config(..., buf.buf) failed: %d", err);
-		if (versioncmp(buf.buf, "10.36") < 0)
-			options |= PCRE2_NO_START_OPTIMIZE;
-		strbuf_release(&buf);
-	}
+	if (PCRE2_MATCH_INVALID_UTF && options & (PCRE2_UTF | PCRE2_CASELESS))
+		options |= PCRE2_NO_START_OPTIMIZE;
+#endif
 
 	p->pcre2_pattern = pcre2_compile((PCRE2_SPTR)p->pattern,
 					 p->patternlen, options, &error, &erroffset,
diff --git a/grep.h b/grep.h
index ae89d6254b3..54e52042cb9 100644
--- a/grep.h
+++ b/grep.h
@@ -4,6 +4,9 @@
 #ifdef USE_LIBPCRE2
 #define PCRE2_CODE_UNIT_WIDTH 8
 #include <pcre2.h>
+#if (PCRE2_MAJOR >= 10 && PCRE2_MINOR >= 36) || PCRE2_MAJOR >= 11
+#define GIT_PCRE2_VERSION_10_36_OR_HIGHER
+#endif
 #else
 typedef int pcre2_code;
 typedef int pcre2_match_data;
-- 
2.30.0.284.gd98b1dd5eaa7


  parent reply	other threads:[~2021-02-18  0:09 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-16 12:06 [PATCH 0/3] Revive 'pcre2-chartables-leakfix' Johannes Schindelin via GitGitGadget
2019-10-16 12:06 ` [PATCH 1/3] grep: make PCRE1 aware of custom allocator Carlo Marcelo Arenas Belón via GitGitGadget
2019-10-16 12:06 ` [PATCH 2/3] grep: make PCRE2 " Carlo Marcelo Arenas Belón via GitGitGadget
2019-10-16 12:06 ` [PATCH 3/3] grep: avoid leak of chartables in PCRE2 Johannes Schindelin via GitGitGadget
2019-10-16 12:10 ` [PATCH v2 0/3] Revive 'pcre2-chartables-leakfix' Johannes Schindelin via GitGitGadget
2019-10-16 12:10   ` [PATCH v2 1/3] grep: make PCRE1 aware of custom allocator Carlo Marcelo Arenas Belón via GitGitGadget
2019-10-16 12:10   ` [PATCH v2 2/3] grep: make PCRE2 " Carlo Marcelo Arenas Belón via GitGitGadget
2019-10-18  1:38     ` Junio C Hamano
2021-02-04 21:05     ` [PATCH 00/10] grep/pcre2: memory allocation fixes Ævar Arnfjörð Bjarmason
2021-02-10 21:34       ` Junio C Hamano
2021-02-18  0:07       ` [PATCH v2 " Ævar Arnfjörð Bjarmason
2021-03-04  0:34         ` Junio C Hamano
2021-02-18  0:07       ` [PATCH v2 01/10] grep/pcre2: drop needless assignment + assert() on opt->pcre2 Ævar Arnfjörð Bjarmason
2021-02-18  0:07       ` [PATCH v2 02/10] grep/pcre2: drop needless assignment to NULL Ævar Arnfjörð Bjarmason
2021-02-18  0:07       ` [PATCH v2 03/10] grep/pcre2: correct reference to grep_init() in comment Ævar Arnfjörð Bjarmason
2021-02-18  0:07       ` [PATCH v2 04/10] grep/pcre2: prepare to add debugging to pcre2_malloc() Ævar Arnfjörð Bjarmason
2021-02-18  0:07       ` [PATCH v2 05/10] grep/pcre2: add GREP_PCRE2_DEBUG_MALLOC debug mode Ævar Arnfjörð Bjarmason
2021-02-18  0:07       ` Ævar Arnfjörð Bjarmason [this message]
2021-03-04  0:14         ` [PATCH v2 06/10] grep/pcre2: use compile-time PCREv2 version test Junio C Hamano
2021-02-18  0:07       ` [PATCH v2 07/10] grep/pcre2: use pcre2_maketables_free() function Ævar Arnfjörð Bjarmason
2021-02-18  0:07       ` [PATCH v2 08/10] grep/pcre2: actually make pcre2 use custom allocator Ævar Arnfjörð Bjarmason
2021-03-04  0:24         ` Junio C Hamano
2021-02-18  0:07       ` [PATCH v2 09/10] grep/pcre2: move back to thread-only PCREv2 structures Ævar Arnfjörð Bjarmason
2021-03-04  0:27         ` Junio C Hamano
2021-02-18  0:07       ` [PATCH v2 10/10] grep/pcre2: move definitions of pcre2_{malloc,free} Ævar Arnfjörð Bjarmason
2021-03-04  0:28         ` Junio C Hamano
2021-02-04 21:05     ` [PATCH 01/10] grep/pcre2: drop needless assignment + assert() on opt->pcre2 Ævar Arnfjörð Bjarmason
2021-02-04 21:05     ` [PATCH 02/10] grep/pcre2: drop needless assignment to NULL Ævar Arnfjörð Bjarmason
2021-02-04 21:05     ` [PATCH 03/10] grep/pcre2: correct reference to grep_init() in comment Ævar Arnfjörð Bjarmason
2021-02-04 21:05     ` [PATCH 04/10] grep/pcre2: prepare to add debugging to pcre2_malloc() Ævar Arnfjörð Bjarmason
2021-02-04 21:05     ` [PATCH 05/10] grep/pcre2: add GREP_PCRE2_DEBUG_MALLOC debug mode Ævar Arnfjörð Bjarmason
2021-02-10 10:38       ` Johannes Schindelin
2021-02-04 21:05     ` [PATCH 06/10] grep/pcre2: use compile-time PCREv2 version test Ævar Arnfjörð Bjarmason
2021-02-04 21:05     ` [PATCH 07/10] grep/pcre2: use pcre2_maketables_free() function Ævar Arnfjörð Bjarmason
2021-02-10 10:43       ` Johannes Schindelin
2021-03-04  0:16       ` Junio C Hamano
2021-02-04 21:05     ` [PATCH 08/10] grep/pcre2: actually make pcre2 use custom allocator Ævar Arnfjörð Bjarmason
2021-02-10 12:38       ` Johannes Schindelin
2021-02-04 21:05     ` [PATCH 09/10] grep/pcre2: move back to thread-only PCREv2 structures Ævar Arnfjörð Bjarmason
2021-02-04 21:05     ` [PATCH 10/10] grep/pcre2: move definitions of pcre2_{malloc,free} Ævar Arnfjörð Bjarmason
2021-02-10 12:40       ` Johannes Schindelin
2019-10-16 12:10   ` [PATCH v2 3/3] grep: avoid leak of chartables in PCRE2 Carlo Marcelo Arenas Belón via GitGitGadget

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