/usr/lib/perl/5.18.2/re.pm is in perl-base 5.18.2-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 | package re;
# pragma for controlling the regexp engine
use strict;
use warnings;
our $VERSION = "0.23";
our @ISA = qw(Exporter);
our @EXPORT_OK = ('regmust',
qw(is_regexp regexp_pattern
regname regnames regnames_count));
our %EXPORT_OK = map { $_ => 1 } @EXPORT_OK;
my %bitmask = (
taint => 0x00100000, # HINT_RE_TAINT
eval => 0x00200000, # HINT_RE_EVAL
);
my $flags_hint = 0x02000000; # HINT_RE_FLAGS
my $PMMOD_SHIFT = 0;
my %reflags = (
m => 1 << ($PMMOD_SHIFT + 0),
s => 1 << ($PMMOD_SHIFT + 1),
i => 1 << ($PMMOD_SHIFT + 2),
x => 1 << ($PMMOD_SHIFT + 3),
p => 1 << ($PMMOD_SHIFT + 4),
# special cases:
d => 0,
l => 1,
u => 2,
a => 3,
aa => 4,
);
sub setcolor {
eval { # Ignore errors
require Term::Cap;
my $terminal = Tgetent Term::Cap ({OSPEED => 9600}); # Avoid warning.
my $props = $ENV{PERL_RE_TC} || 'md,me,so,se,us,ue';
my @props = split /,/, $props;
my $colors = join "\t", map {$terminal->Tputs($_,1)} @props;
$colors =~ s/\0//g;
$ENV{PERL_RE_COLORS} = $colors;
};
if ($@) {
$ENV{PERL_RE_COLORS} ||= qq'\t\t> <\t> <\t\t';
}
}
my %flags = (
COMPILE => 0x0000FF,
PARSE => 0x000001,
OPTIMISE => 0x000002,
TRIEC => 0x000004,
DUMP => 0x000008,
FLAGS => 0x000010,
EXECUTE => 0x00FF00,
INTUIT => 0x000100,
MATCH => 0x000200,
TRIEE => 0x000400,
EXTRA => 0xFF0000,
TRIEM => 0x010000,
OFFSETS => 0x020000,
OFFSETSDBG => 0x040000,
STATE => 0x080000,
OPTIMISEM => 0x100000,
STACK => 0x280000,
BUFFERS => 0x400000,
GPOS => 0x800000,
);
$flags{ALL} = -1 & ~($flags{OFFSETS}|$flags{OFFSETSDBG}|$flags{BUFFERS});
$flags{All} = $flags{all} = $flags{DUMP} | $flags{EXECUTE};
$flags{Extra} = $flags{EXECUTE} | $flags{COMPILE} | $flags{GPOS};
$flags{More} = $flags{MORE} = $flags{All} | $flags{TRIEC} | $flags{TRIEM} | $flags{STATE};
$flags{State} = $flags{DUMP} | $flags{EXECUTE} | $flags{STATE};
$flags{TRIE} = $flags{DUMP} | $flags{EXECUTE} | $flags{TRIEC};
if (defined &DynaLoader::boot_DynaLoader) {
require XSLoader;
XSLoader::load();
}
# else we're miniperl
# We need to work for miniperl, because the XS toolchain uses Text::Wrap, which
# uses re 'taint'.
sub _load_unload {
my ($on)= @_;
if ($on) {
# We call install() every time, as if we didn't, we wouldn't
# "see" any changes to the color environment var since
# the last time it was called.
# install() returns an integer, which if casted properly
# in C resolves to a structure containing the regexp
# hooks. Setting it to a random integer will guarantee
# segfaults.
$^H{regcomp} = install();
} else {
delete $^H{regcomp};
}
}
sub bits {
my $on = shift;
my $bits = 0;
ARG:
foreach my $idx (0..$#_){
my $s=$_[$idx];
if ($s eq 'Debug' or $s eq 'Debugcolor') {
setcolor() if $s =~/color/i;
${^RE_DEBUG_FLAGS} = 0 unless defined ${^RE_DEBUG_FLAGS};
for my $idx ($idx+1..$#_) {
if ($flags{$_[$idx]}) {
if ($on) {
${^RE_DEBUG_FLAGS} |= $flags{$_[$idx]};
} else {
${^RE_DEBUG_FLAGS} &= ~ $flags{$_[$idx]};
}
} else {
require Carp;
Carp::carp("Unknown \"re\" Debug flag '$_[$idx]', possible flags: ",
join(", ",sort keys %flags ) );
}
}
_load_unload($on ? 1 : ${^RE_DEBUG_FLAGS});
last;
} elsif ($s eq 'debug' or $s eq 'debugcolor') {
setcolor() if $s =~/color/i;
_load_unload($on);
last;
} elsif (exists $bitmask{$s}) {
$bits |= $bitmask{$s};
} elsif ($EXPORT_OK{$s}) {
require Exporter;
re->export_to_level(2, 're', $s);
} elsif ($s =~ s/^\///) {
my $reflags = $^H{reflags} || 0;
my $seen_charset;
while ($s =~ m/( . )/gx) {
local $_ = $1;
if (/[adul]/) {
# The 'a' may be repeated; hide this from the rest of the
# code by counting and getting rid of all of them, then
# changing to 'aa' if there is a repeat.
if ($_ eq 'a') {
my $sav_pos = pos $s;
my $a_count = $s =~ s/a//g;
pos $s = $sav_pos - 1; # -1 because got rid of the 'a'
if ($a_count > 2) {
require Carp;
Carp::carp(
qq 'The "a" flag may only appear a maximum of twice'
);
}
elsif ($a_count == 2) {
$_ = 'aa';
}
}
if ($on) {
if ($seen_charset) {
require Carp;
if ($seen_charset ne $_) {
Carp::carp(
qq 'The "$seen_charset" and "$_" flags '
.qq 'are exclusive'
);
}
else {
Carp::carp(
qq 'The "$seen_charset" flag may not appear '
.qq 'twice'
);
}
}
$^H{reflags_charset} = $reflags{$_};
$seen_charset = $_;
}
else {
delete $^H{reflags_charset}
if defined $^H{reflags_charset}
&& $^H{reflags_charset} == $reflags{$_};
}
} elsif (exists $reflags{$_}) {
$on
? $reflags |= $reflags{$_}
: ($reflags &= ~$reflags{$_});
} else {
require Carp;
Carp::carp(
qq'Unknown regular expression flag "$_"'
);
next ARG;
}
}
($^H{reflags} = $reflags or defined $^H{reflags_charset})
? $^H |= $flags_hint
: ($^H &= ~$flags_hint);
} else {
require Carp;
Carp::carp("Unknown \"re\" subpragma '$s' (known ones are: ",
join(', ', map {qq('$_')} 'debug', 'debugcolor', sort keys %bitmask),
")");
}
}
$bits;
}
sub import {
shift;
$^H |= bits(1, @_);
}
sub unimport {
shift;
$^H &= ~ bits(0, @_);
}
1;
__END__
|