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Add --allow-lookaround-bsk to pcre2grep

This commit is contained in:
Philip Hazel 2021-08-31 16:24:25 +01:00
parent edcc076bd8
commit 31a46200fa
5 changed files with 464 additions and 444 deletions
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12
RunGrepTest
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@ -558,7 +558,7 @@ echo "RC=$?" >>testtrygrep
echo "---------------------------- Test 107 -----------------------------" >>testtrygrep
echo "a" >testtemp1grep
echo "aaaaa" >>testtemp1grep
(cd $srcdir; $valgrind $vjs $pcre2grep --line-offsets '(?<=\Ka)' $builddir/testtemp1grep) >>testtrygrep 2>&1
(cd $srcdir; $valgrind $vjs $pcre2grep --line-offsets --allow-lookaround-bsk '(?<=\Ka)' $builddir/testtemp1grep) >>testtrygrep 2>&1
echo "RC=$?" >>testtrygrep
echo "---------------------------- Test 108 ------------------------------" >>testtrygrep
@ -638,13 +638,13 @@ echo "RC=$?" >>testtrygrep
echo "---------------------------- Test 125 -----------------------------" >>testtrygrep
printf 'abcd\n' >testNinputgrep
$valgrind $vjs $pcre2grep --colour=always '(?<=\K.)' testNinputgrep >>testtrygrep
$valgrind $vjs $pcre2grep --colour=always --allow-lookaround-bsk '(?<=\K.)' testNinputgrep >>testtrygrep
echo "RC=$?" >>testtrygrep
$valgrind $vjs $pcre2grep --colour=always '(?=.\K)' testNinputgrep >>testtrygrep
$valgrind $vjs $pcre2grep --colour=always --allow-lookaround-bsk '(?=.\K)' testNinputgrep >>testtrygrep
echo "RC=$?" >>testtrygrep
$valgrind $vjs $pcre2grep --colour=always '(?<=\K[ac])' testNinputgrep >>testtrygrep
$valgrind $vjs $pcre2grep --colour=always --allow-lookaround-bsk '(?<=\K[ac])' testNinputgrep >>testtrygrep
echo "RC=$?" >>testtrygrep
$valgrind $vjs $pcre2grep --colour=always '(?=[ac]\K)' testNinputgrep >>testtrygrep
$valgrind $vjs $pcre2grep --colour=always --allow-lookaround-bsk '(?=[ac]\K)' testNinputgrep >>testtrygrep
echo "RC=$?" >>testtrygrep
echo "---------------------------- Test 126 -----------------------------" >>testtrygrep
@ -701,7 +701,7 @@ if [ $utf8 -ne 0 ] ; then
echo "RC=$?" >>testtrygrep
echo "---------------------------- Test U3 ------------------------------" >>testtrygrep
(cd $srcdir; $valgrind $vjs $pcre2grep --line-offsets -u --newline=any '(?<=\K\x{17f})' ./testdata/grepinput8) >>testtrygrep
(cd $srcdir; $valgrind $vjs $pcre2grep --line-offsets -u --newline=any --allow-lookaround-bsk '(?<=\K\x{17f})' ./testdata/grepinput8) >>testtrygrep
echo "RC=$?" >>testtrygrep
echo "---------------------------- Test U4 ------------------------------" >>testtrygrep

12
doc/html/pcre2grep.html
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@ -188,6 +188,12 @@ Treat binary files as text. This is equivalent to
<b>--binary-files</b>=<i>text</i>.
</P>
<P>
<b>--allow-lookaround-bsk</b>
PCRE2 now forbids the use of \K in lookarounds by default, in line with Perl.
This option causes <b>pcre2grep</b> to set the PCRE2_EXTRA_ALLOW_LOOKAROUND_BSK
option, which enables this somewhat dangerous usage.
</P>
<P>
<b>-B</b> <i>number</i>, <b>--before-context=</b><i>number</i>
Output up to <i>number</i> lines of context before each matching line. Fewer
lines are output if the previous match or the start of the file is within
@ -1040,16 +1046,16 @@ because VMS does not distinguish between exit(0) and exit(1).
<P>
Philip Hazel
<br>
University Computing Service
Retired from University Computing Service
<br>
Cambridge, England.
<br>
</P>
<br><a name="SEC16" href="#TOC1">REVISION</a><br>
<P>
Last updated: 04 October 2020
Last updated: 31 August 2021
<br>
Copyright &copy; 1997-2020 University of Cambridge.
Copyright &copy; 1997-2021 University of Cambridge.
<br>
<p>
Return to the <a href="index.html">PCRE2 index page</a>.

13
doc/pcre2grep.1
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@ -1,4 +1,4 @@
.TH PCRE2GREP 1 "04 October 2020" "PCRE2 10.36"
.TH PCRE2GREP 1 "31 August 2021" "PCRE2 10.38"
.SH NAME
pcre2grep - a grep with Perl-compatible regular expressions.
.SH SYNOPSIS
@ -157,6 +157,11 @@ is expected to be relatively small. When \fB-c\fP is used, \fB-A\fP is ignored.
Treat binary files as text. This is equivalent to
\fB--binary-files\fP=\fItext\fP.
.TP
\fB--allow-lookaround-bsk\fP
PCRE2 now forbids the use of \eK in lookarounds by default, in line with Perl.
This option causes \fBpcre2grep\fP to set the PCRE2_EXTRA_ALLOW_LOOKAROUND_BSK
option, which enables this somewhat dangerous usage.
.TP
\fB-B\fP \fInumber\fP, \fB--before-context=\fP\fInumber\fP
Output up to \fInumber\fP lines of context before each matching line. Fewer
lines are output if the previous match or the start of the file is within
@ -946,7 +951,7 @@ because VMS does not distinguish between exit(0) and exit(1).
.sp
.nf
Philip Hazel
University Computing Service
Retired from University Computing Service
Cambridge, England.
.fi
.
@ -955,6 +960,6 @@ Cambridge, England.
.rs
.sp
.nf
Last updated: 04 October 2020
Copyright (c) 1997-2020 University of Cambridge.
Last updated: 31 August 2021
Copyright (c) 1997-2021 University of Cambridge.
.fi

866
doc/pcre2grep.txt
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File diff suppressed because it is too large Load Diff

5
src/pcre2grep.c
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@ -423,6 +423,7 @@ used to identify them. */
#define N_OM_SEPARATOR (-22)
#define N_MAX_BUFSIZE (-23)
#define N_OM_CAPTURE (-24)
#define N_ALLABSK (-25)
static option_item optionlist[] = {
{ OP_NODATA, N_NULL, NULL, "", "terminate options" },
@ -490,6 +491,7 @@ static option_item optionlist[] = {
{ OP_NODATA, 'v', NULL, "invert-match", "select non-matching lines" },
{ OP_NODATA, 'w', NULL, "word-regex(p)", "force patterns to match only as words" },
{ OP_NODATA, 'x', NULL, "line-regex(p)", "force patterns to match only whole lines" },
{ OP_NODATA, N_ALLABSK, NULL, "allow-lookaround-bsk", "allow \\K in lookarounds" },
{ OP_NODATA, 0, NULL, NULL, NULL }
};
@ -3544,7 +3546,7 @@ return rc;
/*************************************************
* Handle a single-letter, no data option *
* Handle a no-data option *
*************************************************/
static int
@ -3557,6 +3559,7 @@ switch(letter)
case N_LBUFFER: line_buffered = TRUE; break;
case N_LOFFSETS: line_offsets = number = TRUE; break;
case N_NOJIT: use_jit = FALSE; break;
case N_ALLABSK: extra_options |= PCRE2_EXTRA_ALLOW_LOOKAROUND_BSK; break;
case 'a': binary_files = BIN_TEXT; break;
case 'c': count_only = TRUE; break;
case 'F': options |= PCRE2_LITERAL; break;