mirror of
https://github.com/fish-shell/fish-shell.git
synced 2024-12-18 12:33:38 +08:00
379 lines
10 KiB
Bash
Executable File
Vendored
379 lines
10 KiB
Bash
Executable File
Vendored
#! /bin/sh
|
|
|
|
# Script for testing regular expressions with perl to check that PCRE2 handles
|
|
# them the same. If the first argument to this script is "-w", Perl is also
|
|
# called with "-w", which turns on its warning mode.
|
|
#
|
|
# The Perl code has to have "use utf8" and "require Encode" at the start when
|
|
# running UTF-8 tests, but *not* for non-utf8 tests. (The "require" would
|
|
# actually be OK for non-utf8-tests, but is not always installed, so this way
|
|
# the script will always run for these tests.)
|
|
#
|
|
# The desired effect is achieved by making this a shell script that passes the
|
|
# Perl script to Perl through a pipe. If the first argument (possibly after
|
|
# removing "-w") is "-utf8", a suitable prefix is set up.
|
|
#
|
|
# The remaining arguments, if any, are passed to Perl. They are an input file
|
|
# and an output file. If there is one argument, the output is written to
|
|
# STDOUT. If Perl receives no arguments, it opens /dev/tty as input, and writes
|
|
# output to STDOUT. (I haven't found a way of getting it to use STDIN, because
|
|
# of the contorted piping input.)
|
|
|
|
perl=perl
|
|
perlarg=''
|
|
prefix=''
|
|
|
|
if [ $# -gt 0 -a "$1" = "-w" ] ; then
|
|
perlarg="-w"
|
|
shift
|
|
fi
|
|
|
|
if [ $# -gt 0 -a "$1" = "-utf8" ] ; then
|
|
prefix="use utf8; require Encode;"
|
|
shift
|
|
fi
|
|
|
|
|
|
# The Perl script that follows has a similar specification to pcre2test, and so
|
|
# can be given identical input, except that input patterns can be followed only
|
|
# by Perl's lower case modifiers and certain other pcre2test modifiers that are
|
|
# either handled or ignored:
|
|
#
|
|
# aftertext interpreted as "print $' afterwards"
|
|
# afteralltext ignored
|
|
# dupnames ignored (Perl always allows)
|
|
# jitstack ignored
|
|
# mark show mark information
|
|
# no_auto_possess ignored
|
|
# no_start_optimize insert (??{""}) at pattern start (disables optimizing)
|
|
# -no_start_optimize ignored
|
|
# subject_literal does not process subjects for escapes
|
|
# ucp sets Perl's /u modifier
|
|
# utf invoke UTF-8 functionality
|
|
#
|
|
# Comment lines are ignored. The #pattern command can be used to set modifiers
|
|
# that will be added to each subsequent pattern, after any modifiers it may
|
|
# already have. NOTE: this is different to pcre2test where #pattern sets
|
|
# defaults which can be overridden on individual patterns. The #subject command
|
|
# may be used to set or unset a default "mark" modifier for data lines. This is
|
|
# the only use of #subject that is supported. The #perltest, #forbid_utf, and
|
|
# #newline_default commands, which are needed in the relevant pcre2test files,
|
|
# are ignored. Any other #-command is ignored, with a warning message.
|
|
#
|
|
# The data lines must not have any pcre2test modifiers. Unless
|
|
# "subject_literal" is on the pattern, data lines are processed as
|
|
# Perl double-quoted strings, so if they contain " $ or @ characters, these
|
|
# have to be escaped. For this reason, all such characters in the
|
|
# Perl-compatible testinput1 and testinput4 files are escaped so that they can
|
|
# be used for perltest as well as for pcre2test. The output from this script
|
|
# should be same as from pcre2test, apart from the initial identifying banner.
|
|
#
|
|
# The other testinput files are not suitable for feeding to perltest.sh,
|
|
# because they make use of the special modifiers that pcre2test uses for
|
|
# testing features of PCRE2. Some of these files also contain malformed regular
|
|
# expressions, in order to check that PCRE2 diagnoses them correctly.
|
|
|
|
(echo "$prefix" ; cat <<'PERLEND'
|
|
|
|
# Function for turning a string into a string of printing chars.
|
|
|
|
sub pchars {
|
|
my($t) = "";
|
|
if ($utf8)
|
|
{
|
|
@p = unpack('U*', $_[0]);
|
|
foreach $c (@p)
|
|
{
|
|
if ($c >= 32 && $c < 127) { $t .= chr $c; }
|
|
else { $t .= sprintf("\\x{%02x}", $c);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
foreach $c (split(//, $_[0]))
|
|
{
|
|
if (ord $c >= 32 && ord $c < 127) { $t .= $c; }
|
|
else { $t .= sprintf("\\x%02x", ord $c); }
|
|
}
|
|
}
|
|
$t;
|
|
}
|
|
|
|
|
|
# Read lines from a named file or stdin and write to a named file or stdout;
|
|
# lines consist of a regular expression, in delimiters and optionally followed
|
|
# by options, followed by a set of test data, terminated by an empty line.
|
|
|
|
# Sort out the input and output files
|
|
|
|
if (@ARGV > 0)
|
|
{
|
|
open(INFILE, "<$ARGV[0]") || die "Failed to open $ARGV[0]\n";
|
|
$infile = "INFILE";
|
|
$interact = 0;
|
|
}
|
|
else
|
|
{
|
|
open(INFILE, "</dev/tty") || die "Failed to open /dev/tty\n";
|
|
$infile = "INFILE";
|
|
$interact = 1;
|
|
}
|
|
|
|
if (@ARGV > 1)
|
|
{
|
|
open(OUTFILE, ">$ARGV[1]") || die "Failed to open $ARGV[1]\n";
|
|
$outfile = "OUTFILE";
|
|
}
|
|
else { $outfile = "STDOUT"; }
|
|
|
|
printf($outfile "Perl $] Regular Expressions\n\n");
|
|
|
|
# Main loop
|
|
|
|
NEXT_RE:
|
|
for (;;)
|
|
{
|
|
printf " re> " if $interact;
|
|
last if ! ($_ = <$infile>);
|
|
printf $outfile "$_" if ! $interact;
|
|
next if ($_ =~ /^\s*$/ || $_ =~ /^#[\s!]/);
|
|
|
|
# A few of pcre2test's #-commands are supported, or just ignored. Any others
|
|
# cause an error.
|
|
|
|
if ($_ =~ /^#pattern(.*)/)
|
|
{
|
|
$extra_modifiers = $1;
|
|
chomp($extra_modifiers);
|
|
$extra_modifiers =~ s/\s+$//;
|
|
next;
|
|
}
|
|
elsif ($_ =~ /^#subject(.*)/)
|
|
{
|
|
$mod = $1;
|
|
chomp($mod);
|
|
$mod =~ s/\s+$//;
|
|
if ($mod =~ s/(-?)mark,?//)
|
|
{
|
|
$minus = $1;
|
|
$default_show_mark = ($minus =~ /^$/);
|
|
}
|
|
if ($mod !~ /^\s*$/)
|
|
{
|
|
printf $outfile "** Warning: \"$mod\" in #subject ignored\n";
|
|
}
|
|
next;
|
|
}
|
|
elsif ($_ =~ /^#/)
|
|
{
|
|
if ($_ !~ /^#newline_default|^#perltest|^#forbid_utf/)
|
|
{
|
|
printf $outfile "** Warning: #-command ignored: %s", $_;
|
|
}
|
|
next;
|
|
}
|
|
|
|
$pattern = $_;
|
|
|
|
while ($pattern !~ /^\s*(.).*\1/s)
|
|
{
|
|
printf " > " if $interact;
|
|
last if ! ($_ = <$infile>);
|
|
printf $outfile "$_" if ! $interact;
|
|
$pattern .= $_;
|
|
}
|
|
|
|
chomp($pattern);
|
|
$pattern =~ s/\s+$//;
|
|
|
|
# Split the pattern from the modifiers and adjust them as necessary.
|
|
|
|
$pattern =~ /^\s*((.).*\2)(.*)$/s;
|
|
$pat = $1;
|
|
$del = $2;
|
|
$mod = "$3,$extra_modifiers";
|
|
$mod =~ s/^,\s*//;
|
|
|
|
# The private "aftertext" modifier means "print $' afterwards".
|
|
|
|
$showrest = ($mod =~ s/aftertext,?//);
|
|
|
|
# The "subject_literal" modifer disables escapes in subjects.
|
|
|
|
$subject_literal = ($mod =~ s/subject_literal,?//);
|
|
|
|
# "allaftertext" is used by pcre2test to print remainders after captures
|
|
|
|
$mod =~ s/allaftertext,?//;
|
|
|
|
# Detect utf
|
|
|
|
$utf8 = $mod =~ s/utf,?//;
|
|
|
|
# Remove "dupnames".
|
|
|
|
$mod =~ s/dupnames,?//;
|
|
|
|
# Remove "jitstack".
|
|
|
|
$mod =~ s/jitstack=\d+,?//;
|
|
|
|
# The "mark" modifier requests checking of MARK data */
|
|
|
|
$show_mark = $default_show_mark | ($mod =~ s/mark,?//);
|
|
|
|
# "ucp" asks pcre2test to set PCRE2_UCP; change this to /u for Perl
|
|
|
|
$mod =~ s/ucp,?/u/;
|
|
|
|
# Remove "no_auto_possess".
|
|
|
|
$mod =~ s/no_auto_possess,?//;
|
|
|
|
# Use no_start_optimize (disable PCRE2 start-up optimization) to disable Perl
|
|
# optimization by inserting (??{""}) at the start of the pattern. We may
|
|
# also encounter -no_start_optimize from a #pattern setting.
|
|
|
|
$mod =~ s/-no_start_optimize,?//;
|
|
if ($mod =~ s/no_start_optimize,?//) { $pat =~ s/$del/$del(??{""})/; }
|
|
|
|
# Add back retained modifiers and check that the pattern is valid.
|
|
|
|
$mod =~ s/,//g;
|
|
$pattern = "$pat$mod";
|
|
eval "\$_ =~ ${pattern}";
|
|
if ($@)
|
|
{
|
|
printf $outfile "Error: $@";
|
|
if (! $interact)
|
|
{
|
|
for (;;)
|
|
{
|
|
last if ! ($_ = <$infile>);
|
|
last if $_ =~ /^\s*$/;
|
|
}
|
|
}
|
|
next NEXT_RE;
|
|
}
|
|
|
|
# If the /g modifier is present, we want to put a loop round the matching;
|
|
# otherwise just a single "if".
|
|
|
|
$cmd = ($pattern =~ /g[a-z]*$/)? "while" : "if";
|
|
|
|
# If the pattern is actually the null string, Perl uses the most recently
|
|
# executed (and successfully compiled) regex is used instead. This is a
|
|
# nasty trap for the unwary! The PCRE2 test suite does contain null strings
|
|
# in places - if they are allowed through here all sorts of weird and
|
|
# unexpected effects happen. To avoid this, we replace such patterns with
|
|
# a non-null pattern that has the same effect.
|
|
|
|
$pattern = "/(?#)/$2" if ($pattern =~ /^(.)\1(.*)$/);
|
|
|
|
# Read data lines and test them
|
|
|
|
for (;;)
|
|
{
|
|
printf "data> " if $interact;
|
|
last NEXT_RE if ! ($_ = <$infile>);
|
|
chomp;
|
|
printf $outfile "%s", "$_\n" if ! $interact;
|
|
|
|
s/\s+$//; # Remove trailing space
|
|
s/^\s+//; # Remove leading space
|
|
|
|
last if ($_ eq "");
|
|
next if $_ =~ /^\\=(?:\s|$)/; # Comment line
|
|
|
|
if ($subject_literal)
|
|
{
|
|
$x = $_;
|
|
}
|
|
else
|
|
{
|
|
$x = eval "\"$_\""; # To get escapes processed
|
|
}
|
|
|
|
# Empty array for holding results, ensure $REGERROR and $REGMARK are
|
|
# unset, then do the matching.
|
|
|
|
@subs = ();
|
|
|
|
$pushes = "push \@subs,\$&;" .
|
|
"push \@subs,\$1;" .
|
|
"push \@subs,\$2;" .
|
|
"push \@subs,\$3;" .
|
|
"push \@subs,\$4;" .
|
|
"push \@subs,\$5;" .
|
|
"push \@subs,\$6;" .
|
|
"push \@subs,\$7;" .
|
|
"push \@subs,\$8;" .
|
|
"push \@subs,\$9;" .
|
|
"push \@subs,\$10;" .
|
|
"push \@subs,\$11;" .
|
|
"push \@subs,\$12;" .
|
|
"push \@subs,\$13;" .
|
|
"push \@subs,\$14;" .
|
|
"push \@subs,\$15;" .
|
|
"push \@subs,\$16;" .
|
|
"push \@subs,\$'; }";
|
|
|
|
undef $REGERROR;
|
|
undef $REGMARK;
|
|
|
|
eval "${cmd} (\$x =~ ${pattern}) {" . $pushes;
|
|
|
|
if ($@)
|
|
{
|
|
printf $outfile "Error: $@\n";
|
|
next NEXT_RE;
|
|
}
|
|
elsif (scalar(@subs) == 0)
|
|
{
|
|
printf $outfile "No match";
|
|
if ($show_mark && defined $REGERROR && $REGERROR != 1)
|
|
{ printf $outfile (", mark = %s", &pchars($REGERROR)); }
|
|
printf $outfile "\n";
|
|
}
|
|
else
|
|
{
|
|
while (scalar(@subs) != 0)
|
|
{
|
|
printf $outfile (" 0: %s\n", &pchars($subs[0]));
|
|
printf $outfile (" 0+ %s\n", &pchars($subs[17])) if $showrest;
|
|
$last_printed = 0;
|
|
for ($i = 1; $i <= 16; $i++)
|
|
{
|
|
if (defined $subs[$i])
|
|
{
|
|
while ($last_printed++ < $i-1)
|
|
{ printf $outfile ("%2d: <unset>\n", $last_printed); }
|
|
printf $outfile ("%2d: %s\n", $i, &pchars($subs[$i]));
|
|
$last_printed = $i;
|
|
}
|
|
}
|
|
splice(@subs, 0, 18);
|
|
}
|
|
|
|
# It seems that $REGMARK is not marked as UTF-8 even when use utf8 is
|
|
# set and the input pattern was a UTF-8 string. We can, however, force
|
|
# it to be so marked.
|
|
|
|
if ($show_mark && defined $REGMARK && $REGMARK != 1)
|
|
{
|
|
$xx = $REGMARK;
|
|
$xx = Encode::decode_utf8($xx) if $utf8;
|
|
printf $outfile ("MK: %s\n", &pchars($xx));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
# printf $outfile "\n";
|
|
|
|
PERLEND
|
|
) | $perl $perlarg - $@
|
|
|
|
# End
|