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pbot/modules/compiler_vm/languages/java.pm
2015-04-10 05:08:07 -07:00

285 lines
8.5 KiB
Perl
Executable File

#!/usr/bin/env perl
use warnings;
use strict;
package java;
use parent '_default';
use Text::Balanced qw/extract_bracketed/;
sub initialize {
my ($self, %conf) = @_;
$self->{sourcefile} = 'prog.java';
$self->{execfile} = 'prog';
$self->{default_options} = '';
$self->{cmdline} = 'javac $options $sourcefile';
$self->{prelude} = <<'END';
import java.*;
END
}
sub process_custom_options {
my $self = shift;
$self->{code} = $self->{code};
$self->add_option("-nomain") if $self->{code} =~ s/(?:^|(?<=\s))-nomain\s*//i;
$self->add_option("-noheaders") if $self->{code} =~ s/(?:^|(?<=\s))-noheaders\s*//i;
$self->{code} = $self->{code};
}
sub pretty_format {
my $self = shift;
my $code = join '', @_;
my $result;
$code = $self->{code} if not defined $code;
open my $fh, ">$self->{sourcefile}" or die "Couldn't write $self->{sourcefile}: $!";
print $fh $code;
close $fh;
system("astyle", "-A3 -UHpnfq", $self->{sourcefile});
open $fh, "<$self->{sourcefile}" or die "Couldn't read $self->{sourcefile}: $!";
$result = join '', <$fh>;
close $fh;
return $result;
}
sub preprocess_code {
my $self = shift;
$self->SUPER::preprocess_code;
my $default_prelude = exists $self->{options}->{'-noheaders'} ? '' : $self->{prelude};
print "code before: [$self->{code}]\n" if $self->{debug};
# add newlines to ends of statements and #includes
my $single_quote = 0;
my $double_quote = 0;
my $parens = 0;
my $escaped = 0;
while($self->{code} =~ m/(.)/msg) {
my $ch = $1;
my $pos = pos $self->{code};
print "adding newlines, ch = [$ch], parens: $parens, single: $single_quote, double: $double_quote, escaped: $escaped, pos: $pos\n" if $self->{debug} >= 10;
if($ch eq '\\') {
$escaped = not $escaped;
} elsif($ch eq '"') {
$double_quote = not $double_quote unless $escaped or $single_quote;
$escaped = 0;
} elsif($ch eq '(' and not $single_quote and not $double_quote) {
$parens++;
} elsif($ch eq ')' and not $single_quote and not $double_quote) {
$parens--;
$parens = 0 if $parens < 0;
} elsif($ch eq ';' and not $single_quote and not $double_quote and $parens == 0) {
if(not substr($self->{code}, $pos, 1) =~ m/[\n\r]/) {
substr ($self->{code}, $pos, 0) = "\n";
pos $self->{code} = $pos + 1;
}
} elsif($ch eq "'") {
$single_quote = not $single_quote unless $escaped or $double_quote;
$escaped = 0;
} elsif($ch eq 'n' and $escaped) {
if(not $single_quote and not $double_quote) {
print "added newline\n" if $self->{debug} >= 10;
substr ($self->{code}, $pos - 2, 2) = "\n";
pos $self->{code} = $pos;
}
$escaped = 0;
} elsif($ch eq '{' and not $single_quote and not $double_quote) {
if(not substr($self->{code}, $pos, 1) =~ m/[\n\r]/) {
substr ($self->{code}, $pos, 0) = "\n";
pos $self->{code} = $pos + 1;
}
} elsif($ch eq '}' and not $single_quote and not $double_quote) {
if(not substr($self->{code}, $pos, 1) =~ m/[\n\r;]/) {
substr ($self->{code}, $pos, 0) = "\n";
pos $self->{code} = $pos + 1;
}
} else {
$escaped = 0;
}
}
print "code after \\n additions: [$self->{code}]\n" if $self->{debug};
# white-out contents of quoted literals so content within literals aren't parsed as code
my $white_code = $self->{code};
$white_code =~ s/(?:\"((?:\\\"|(?!\").)*)\")/'"' . ('-' x length $1) . '"'/ge;
$white_code =~ s/(?:\'((?:\\\'|(?!\').)*)\')/"'" . ('-' x length $1) . "'"/ge;
my $precode;
if($white_code =~ m/\bimport\s/) {
$precode = $self->{code};
} else {
$precode = $default_prelude . $self->{code};
}
$self->{code} = '';
print "--- precode: [$precode]\n" if $self->{debug};
$self->{warn_unterminated_define} = 0;
my $has_main = 0;
my $prelude = '';
while($precode =~ s/^\s*(import .*\n{1,2})//g) {
$prelude .= $1;
}
print "*** prelude: [$prelude]\n precode: [$precode]\n" if $self->{debug};
my $preprecode = $precode;
# white-out contents of quoted literals
$preprecode =~ s/(?:\"((?:\\\"|(?!\").)*)\")/'"' . ('-' x length $1) . '"'/ge;
$preprecode =~ s/(?:\'((?:\\\'|(?!\').)*)\')/"'" . ('-' x length $1) . "'"/ge;
# strip comments
$preprecode =~ s#|//([^\\]|[^\n][\n]?)*?\n|("(\\.|[^"\\])*"|'(\\.|[^'\\])*'|.[^/"'\\]*)#defined $2 ? $2 : ""#gse;
$preprecode =~ s#/\*[^*]*\*+([^/*][^*]*\*+)*/# #gs;
print "preprecode: [$preprecode]\n" if $self->{debug};
print "looking for functions, has main: $has_main\n" if $self->{debug} >= 2;
my $func_regex = qr/^([ *\w]+)\s+([ ()*\w:]+)\s*\(([^;{]*)\s*\)\s*({.*|<%.*|\?\?<.*)/ims;
# look for potential functions to extract
while($preprecode =~ /$func_regex/ms) {
my ($pre_ret, $pre_ident, $pre_params, $pre_potential_body) = ($1, $2, $3, $4);
my $precode_code;
print "looking for functions, found [$pre_ret][$pre_ident][$pre_params][$pre_potential_body], has main: $has_main\n" if $self->{debug} >= 1;
# find the pos at which this function lives, for extracting from precode
$preprecode =~ m/(\Q$pre_ret\E\s+\Q$pre_ident\E\s*\(\s*\Q$pre_params\E\s*\)\s*\Q$pre_potential_body\E)/g;
my $extract_pos = (pos $preprecode) - (length $1);
# now that we have the pos, substitute out the extracted potential function from preprecode
$preprecode =~ s/$func_regex//ms;
# create tmpcode object that starts from extract pos, to skip any quoted code
my $tmpcode = substr($precode, $extract_pos);
print "tmpcode: [$tmpcode]\n" if $self->{debug};
$precode = substr($precode, 0, $extract_pos);
print "precode: [$precode]\n" if $self->{debug};
$precode_code = $precode;
$tmpcode =~ m/$func_regex/ms;
my ($ret, $ident, $params, $potential_body) = ($1, $2, $3, $4);
print "1st extract: [$ret][$ident][$params][$potential_body]\n" if $self->{debug};
$ret =~ s/^\s+//;
$ret =~ s/\s+$//;
if(not length $ret or $ret eq "else" or $ret eq "while" or $ret eq "if" or $ret eq "for" or $ident eq "for" or $ident eq "while" or $ident eq "if") {
$precode .= "$ret $ident ($params) $potential_body";
next;
} else {
$tmpcode =~ s/$func_regex//ms;
}
$potential_body =~ s/^\s*<%/{/ms;
$potential_body =~ s/%>\s*$/}/ms;
$potential_body =~ s/^\s*\?\?</{/ms;
$potential_body =~ s/\?\?>$/}/ms;
my @extract = extract_bracketed($potential_body, '{}');
my $body;
if(not defined $extract[0]) {
if($self->{debug} == 0) {
print "error: unmatched brackets\n";
} else {
print "error: unmatched brackets for function '$ident';\n";
print "body: [$potential_body]\n";
}
exit;
} else {
$body = $extract[0];
$preprecode = $extract[1];
$precode = $extract[1];
}
print "final extract: [$ret][$ident][$params][$body]\n" if $self->{debug};
$self->{code} .= "$precode_code\n$ret $ident($params) $body\n";
if($self->{debug} >= 2) { print '-' x 20 . "\n" }
print " code: [$self->{code}]\n" if $self->{debug} >= 2;
if($self->{debug} >= 2) { print '-' x 20 . "\n" }
print " precode: [$precode]\n" if $self->{debug} >= 2;
$has_main = 1 if $ident =~ m/^\s*\(?\s*main\s*\)?\s*$/;
}
$precode =~ s/^\s+//;
$precode =~ s/\s+$//;
$precode =~ s/^{(.*)}$/$1/s;
if(not $has_main and not exists $self->{options}->{'-nomain'}) {
if ($precode =~ s/^(};?)//) {
$self->{code} .= $1;
}
$self->{code} = "$prelude\nclass prog {\n$self->{code}\n" . "public static void main(String[] args) {\n$precode\n;\n}\n}\n";
} else {
$self->{code} = "$prelude\n$self->{code}\n";
}
print "after func extract, code: [$self->{code}]\n" if $self->{debug};
$self->{code} =~ s/\|n/\n/g;
$self->{code} =~ s/^\s+//;
$self->{code} =~ s/\s+$//;
$self->{code} =~ s/;\s*;\n/;\n/gs;
$self->{code} =~ s/;(\s*\/\*.*?\*\/\s*);\n/;$1/gs;
$self->{code} =~ s/;(\s*\/\/.*?\s*);\n/;$1/gs;
$self->{code} =~ s/({|})\n\s*;\n/$1\n/gs;
$self->{code} =~ s/(?:\n\n)+/\n\n/g;
print "final code: [$self->{code}]\n" if $self->{debug};
}
sub postprocess_output {
my $self = shift;
$self->SUPER::postprocess_output;
my $output = $self->{output};
# backspace
my $boutput = "";
my $active_position = 0;
$output =~ s/\n$//;
while($output =~ /(.)/gms) {
my $c = $1;
if($c eq "\b") {
if(--$active_position <= 0) {
$active_position = 0;
}
next;
}
substr($boutput, $active_position++, 1) = $c;
}
$output = $boutput;
$self->{output} = $output;
}
1;