utils: comparison perlgrok.pl

equal deleted inserted replaced

-:c4085453688b
+:31c4ce4d9b73
 #!/usr/bin/perl
-# $Id: perlgrok.pl,v bca12968c007 2021/09/29 20:31:56 grin $
+# $Id: perlgrok.pl,v d6e64daafdc1 2021/09/29 23:46:59 grin $
 #
 # grok parser in perl
 #
 # (c)Peter 'grin' Gervai, 2021; CC_BY-SA-4.0 / GPLv3+
 # grin*grin.hu
 use strict;
 use IO::File;
 use Getopt::Long;
 # pattern filename
-my $fn_pattern = "patterns";
+my @fn_patterns = ();
 # top pattern we resolve
 my $top = "TEST";
 # debug level
 my $fn_fail;
 my $fn_parsed = "-"; # SDTOUT
 my %input;
 my %processing;
 my $help = 0;
+my $re_trace = 1; # check all regexp
+my %xlate;  # perl names don't support period in name, so we need to translate
 GetOptions(
 "input=s"       => \$fn_test,
-"pattern=s"     => \$fn_pattern,
+"pattern=s"     => \@fn_patterns,
 "top=s"         => \$top,
 "parsed=s"      => \$fn_parsed,
 "failed=s"      => \$fn_fail,
 "debug=i"       => \$DEBUG,
 "help"          => \$help,
 ) or die "error in command line arguments";
 if( $help ) {
-my $VER = '$Id: perlgrok.pl,v bca12968c007 2021/09/29 20:31:56 grin $';
+my $VER = '$Id: perlgrok.pl,v d6e64daafdc1 2021/09/29 23:46:59 grin $';
 print "$0 $VER (c) Peter 'grin' Gervai, 2021\n\n";
-print "Usage: $0 [--input input_file] [--pattern pattern_file] [--top final_macro] \n";
+print "Usage: $0 [--input input_file] [--pattern pattern_file] [--pattern another] [--top final_macro] \n";
 print "          [--parsed parsed_outfile] [--failed failed_lines_file] [--debug n] [--help]\n";
 print "       defaults are stdin, stdout, 'patterns' as patternfile and 'TEST' as final macro.\n\n";
 exit;
 }
+if( $#fn_patterns < 0 ) {
+push @fn_patterns, "patterns";
+}
 # read patterns
-my $f = new IO::File "< $fn_pattern" or die "cannot open patterns: $!";
+foreach my $fn_pattern (@fn_patterns) {
-while( <$f> ) {
+my $f = new IO::File "< $fn_pattern" or die "cannot open pattern $fn_pattern: $!";
-chomp;
+&d(7, "Reading $fn_pattern pattern file contents");
-# skip empty and comment lines
+while( <$f> ) {
-next if /^ *(#|$)/;
+chomp;
+# skip empty and comment lines
-# parse <name><space><content>
+next if /^ *(#|$)/;
-if( /^(\S+) +(.+)$/ ) {
-$input{$1} = $2;
+# parse <name><space><content>
-} else {
+if( /^(\S+) +(.+)$/ ) {
-die "Patternfile parse error:\n$_\n\n";
+if( defined( $input{$1} ) ) {
-}
+&d(1, "Warning: duplicate macro $1 in $fn_pattern; overwrites previous version!");
 }
-$f->close;
+$input{$1} = $2;
+} else {
+die "Patternfile $fn_pattern parse error:\n$_\n\n";
+}
+}
+$f->close;
+}
 &d(5, "Start program");
 &resolve( $top, '<root>' );
 my $res = $input{$top};
 &d(9, "RESULT\n========\n${top} = $res" );
 &d(9, "Pattern length=" . length($res) );
+eval {
+my $test = "abc123";
+$test =~ /$res/;
+};
+if( $@ ) {
+print "ERR: $@\n\n";
+exit;
+}
 ### read file
-$f = new IO::File "< $fn_test" or die "cannot open $fn_test: $!";
+my $f = new IO::File "< $fn_test" or die "cannot open $fn_test: $!";
 my $ff;
 if( $fn_fail ) { $ff = new IO::File "> $fn_fail" or die "cannot open $fn_fail for writing: $!"; }
 my $fout = new IO::File "> $fn_parsed" or die "cannot open output for parsed: $!";
 while( <$f> ) {
 &d(5, "LINE:$_");
 if( /$res/ ) {
 # there is a match, print parsed values
 print $fout "$_\n";
 for my $k ( sort keys %+ ) {
-print $fout "\t$k => '$+{$k}'\n";
+print $fout "\t".&unxlate($k)." => '$+{$k}'\n";
 }
 } else {
 if( $fn_fail ) {
 print $ff "$_\n"  if $fn_fail ;
 } else {
 }
 $processing{$key} = $caller_key;
 &d( 7, "Resolve_all_macros loop in $key");
 # while we have unresolved macros, walk and resolve them all
-while( $data =~ /%\{(?<k>[A-Z_0-9]+)(:(?<v>[_\w\d]+))?\}/ ) {
+while( $data =~ /%\{(?<k>[A-Z_0-9]+)(:(?<v>[_\w.\d]+))?\}/ ) {
 my $r_key = $+{k};
 my $r_name = $+{v} || ""; # this is just informational here
 &d(7, "Resolve macro in $key for '$r_key' (name $r_name) in data /$data/" );
 # update macro in %input with fully resolved line
 $input{$key} = $data;
 &d(7, "RESOLVED '$key'! Result=/$data/");
+if( $re_trace ) {
+# die if regexp is bad
+"abc" =~ /$data/;
+}
 # release loop protection for $key
 delete $processing{$key};
 }
 sub replace_all {
 my ($data, $key) = @_;
 &d(7, "Replace_all $key in /$$data/");
 # while we have this macro in $data somewhere, repeat...
-while( $$data =~ /\{${key}(:(?<v>[_\w\d]+))?\}/ ) {
+while( $$data =~ /\{${key}(:(?<v>[_\w.\d]+))?\}/ ) {
 my $mname = $+{v};
 my $inner = $input{$key};	# shall be already resolved, may be checked (FIXME)
 &d(7, " Found '$key'");
+my $xname = $mname;
 if( $mname ) {
+# if it's not perl compatible, create a translation entry
+if( $mname !~ /^[_A-Za-z][_A-Za-z0-9]*\z/ ) {
+$xname = &gen_xlate_entry($mname);
+}
 # named macro, create a named capture group
-$$data =~ s/%\{${key}:${mname}\}/(?<${mname}>${inner})/g;
+$$data =~ s/%\{${key}:${mname}\}/(?<${xname}>${inner})/g;
 &d(7, "  Replace $key:$mname with named capture group /$inner/");
 } else {
 # unnamed macro, we just throw it in (trust no1 and parenthesize it)
 $$data =~  s/%\{${key}\}/(?:${inner})/g;
 &d(7, "  Replace $key with /$inner/");
 }
+&sanitize_labels( $data );
 &d(9, "   Replacement result is /$$data/");
 }
 &d(7, "REPLACED ALL '$key' in /$$data/");
+}
+sub gen_xlate_entry {
+my ($mname) = @_;
+&d(7, "Generate a translation variable name for $mname");
+my $xname = "xlate_" . int(rand(1_000_000));
+my $count = 100_000;
+while( defined( $xlate{$xname} ) ) {
+$xname = "xlate_" . int(rand(1_000_000));
+die "Cannot generate unique translation for $mname in a _lot_ of steps" if --$count<=0;
+}
+&d(7, "Generated $xname as the name for $mname");
+$xlate{$xname} = $mname;
+return $xname;
+}
+# find ?<names> which perl incompatible, and xlate them forcibly
+sub sanitize_labels {
+my ($data) = @_;
+if( $$data =~ /(?<!\\)\((?!\\)\?<([_A-Za-z][_A-Za-z0-9]*[^>_A-Za-z0-9])/ ) {
+&d(7, "Irregular name in $$data, create translation");
+# we have at least one irregular, get all labels
+while( $$data =~ /(?<!\\)\((?!\\)\?<(.+?)>/g ) {
+my $label = $1;
+&d(9, "Got label $label (***BEFORE $` ##<->## $' AFTER***)");
+if( $label !~ /^[_A-Za-z][_A-Za-z0-9]*\z/ ) {
+# not perl compatible, translate and replace
+my $xname = &gen_xlate_entry($label);
+$$data =~ s/(?<!\\)\((?!\\)\?<${label}>/(?<${xname}>/g;
+&d(5, "ForceReplaced label '$label' with '$xname' in /$$data/");
+}
+}
+}
+}
+sub unxlate {
+my ($xkey) = @_;
+return $xlate{$xkey};
 }
 # extremely low-key debug subsystem :-)
 sub d {

changeset 8	31c4ce4d9b73
parent 7	c4085453688b
child 9	f1cb959b4603