From: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
To: git@vger.kernel.org
Cc: "Junio C Hamano" <gitster@pobox.com>, "Jeff King" <peff@peff.net>,
"Jeffrey Walton" <noloader@gmail.com>,
"Michał Kiedrowicz" <michal.kiedrowicz@gmail.com>,
"J Smith" <dark.panda@gmail.com>,
"Victor Leschuk" <vleschuk@gmail.com>,
"Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>,
"Fredrik Kuivinen" <frekui@gmail.com>,
"Brandon Williams" <bmwill@google.com>,
"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Subject: [PATCH v4 23/31] grep: factor test for \0 in grep patterns into a function
Date: Thu, 25 May 2017 19:45:27 +0000 [thread overview]
Message-ID: <20170525194535.9324-24-avarab@gmail.com> (raw)
In-Reply-To: <20170525194535.9324-1-avarab@gmail.com>
Factor the test for \0 in grep patterns into a function. Since commit
9eceddeec6 ("Use kwset in grep", 2011-08-21) any pattern containing a
\0 is considered fixed as regcomp() can't handle it.
This change makes later changes that make use of either has_null() or
is_fixed() (but not both) smaller.
While I'm at it make the comment conform to the style guide, i.e. add
an opening "/*\n".
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
grep.c | 22 +++++++++++++++-------
1 file changed, 15 insertions(+), 7 deletions(-)
diff --git a/grep.c b/grep.c
index bf6c2494fd..18306bc605 100644
--- a/grep.c
+++ b/grep.c
@@ -321,6 +321,18 @@ static NORETURN void compile_regexp_failed(const struct grep_pat *p,
die("%s'%s': %s", where, p->pattern, error);
}
+static int has_null(const char *s, size_t len)
+{
+ /*
+ * regcomp cannot accept patterns with NULs so when using it
+ * we consider any pattern containing a NUL fixed.
+ */
+ if (memchr(s, 0, len))
+ return 1;
+
+ return 0;
+}
+
#ifdef USE_LIBPCRE
static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt)
{
@@ -394,12 +406,6 @@ static int is_fixed(const char *s, size_t len)
{
size_t i;
- /* regcomp cannot accept patterns with NULs so we
- * consider any pattern containing a NUL fixed.
- */
- if (memchr(s, 0, len))
- return 1;
-
for (i = 0; i < len; i++) {
if (is_regex_special(s[i]))
return 0;
@@ -451,7 +457,9 @@ static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
* simple string match using kws. p->fixed tells us if we
* want to use kws.
*/
- if (opt->fixed || is_fixed(p->pattern, p->patternlen))
+ if (opt->fixed ||
+ has_null(p->pattern, p->patternlen) ||
+ is_fixed(p->pattern, p->patternlen))
p->fixed = !icase || ascii_only;
else
p->fixed = 0;
--
2.13.0.303.g4ebf302169
next prev parent reply other threads:[~2017-05-25 19:47 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-25 19:45 [PATCH v4 00/31] Easy to review grep & pre-PCRE changes Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 01/31] Makefile & configure: reword inaccurate comment about PCRE Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 02/31] grep & rev-list doc: stop promising libpcre for --perl-regexp Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 03/31] test-lib: rename the LIBPCRE prerequisite to PCRE Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 04/31] log: add exhaustive tests for pattern style options & config Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 05/31] log: make --regexp-ignore-case work with --perl-regexp Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 06/31] grep: add a test asserting that --perl-regexp dies when !PCRE Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 07/31] grep: add a test for backreferences in PCRE patterns Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 08/31] grep: change non-ASCII -i test to stop using --debug Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 09/31] grep: add tests for --threads=N and grep.threads Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 10/31] grep: amend submodule recursion test for regex engine testing Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 11/31] grep: add tests for grep pattern types being passed to submodules Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 12/31] grep: add a test helper function for less verbose -f \0 tests Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 13/31] grep: prepare for testing binary regexes containing rx metacharacters Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 14/31] grep: add tests to fix blind spots with \0 patterns Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 15/31] perf: add a GIT_PERF_MAKE_COMMAND for when *_MAKE_OPTS won't do Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 16/31] perf: emit progress output when unpacking & building Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 17/31] perf: add a comparison test of grep regex engines Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 18/31] perf: add a comparison test of grep regex engines with -F Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 19/31] perf: add a comparison test of log --grep regex engines Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 20/31] perf: add a comparison test of log --grep regex engines with -F Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 21/31] grep: catch a missing enum in switch statement Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 22/31] grep: remove redundant regflags assignments Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` Ævar Arnfjörð Bjarmason [this message]
2017-05-25 19:45 ` [PATCH v4 24/31] grep: change the internal PCRE macro names to be PCRE1 Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 25/31] grep: change internal *pcre* variable & function names to be *pcre1* Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 26/31] grep: move is_fixed() earlier to avoid forward declaration Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 27/31] test-lib: add a PTHREADS prerequisite Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 28/31] pack-objects & index-pack: add test for --threads warning Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 29/31] pack-objects: fix buggy warning about threads Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 30/31] grep: given --threads with NO_PTHREADS=YesPlease, warn Ævar Arnfjörð Bjarmason
2017-05-25 19:45 ` [PATCH v4 31/31] grep: assert that threading is enabled when calling grep_{lock,unlock} Ævar Arnfjörð Bjarmason
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: http://vger.kernel.org/majordomo-info.html
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170525194535.9324-24-avarab@gmail.com \
--to=avarab@gmail.com \
--cc=bmwill@google.com \
--cc=dark.panda@gmail.com \
--cc=frekui@gmail.com \
--cc=git@vger.kernel.org \
--cc=gitster@pobox.com \
--cc=michal.kiedrowicz@gmail.com \
--cc=noloader@gmail.com \
--cc=pclouds@gmail.com \
--cc=peff@peff.net \
--cc=vleschuk@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://80x24.org/mirrors/git.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).