2011-01-26 02:59:19 +01:00
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#!/usr/bin/perl
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use warnings;
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use strict;
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2011-02-01 01:41:51 +01:00
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my $USE_LOCAL = defined $ENV{'CC_LOCAL'};
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2011-01-26 02:59:19 +01:00
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my %languages = (
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'C' => {
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2011-02-01 01:41:51 +01:00
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'cmdline' => 'gcc $args $file -o prog -ggdb',
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2011-01-26 02:59:19 +01:00
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'args' => '-Wextra -Wall -Wno-unused -std=gnu89',
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'file' => 'prog.c',
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},
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'C++' => {
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2011-02-01 01:41:51 +01:00
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'cmdline' => 'g++ $args $file -o prog -ggdb',
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2011-01-26 02:59:19 +01:00
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'args' => '',
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'file' => 'prog.cpp',
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},
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'C99' => {
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2011-02-01 01:41:51 +01:00
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'cmdline' => 'gcc $args $file -o prog -ggdb',
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'args' => '-Wextra -Wall -Wno-unused -pedantic -std=c99 -lm',
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2011-01-26 02:59:19 +01:00
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'file' => 'prog.c',
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},
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);
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sub runserver {
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2011-02-01 01:41:51 +01:00
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my ($input, $output);
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if(not defined $USE_LOCAL or $USE_LOCAL == 0) {
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open($input, '<', "/dev/ttyS0") or die $!;
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open($output, '>', "/dev/ttyS0") or die $!;
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} else {
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open($input, '<', "/dev/stdin") or die $!;
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open($output, '>', "/dev/stdout") or die $!;
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}
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2011-01-26 02:59:19 +01:00
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my $lang;
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my $code;
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my $user_args;
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my $user_input;
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print "Waiting for input...\n";
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while(my $line = <$input>) {
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chomp $line;
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next unless length $line;
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print "Got [$line]\n";
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if($line =~ m/^compile:\s*end/) {
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next if not defined $lang or not defined $code;
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print "Attempting compile [$lang] ...\n";
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my $result = interpret($lang, $code, $user_args, $user_input);
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print "Done compiling; result: [$result]\n";
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print $output "result:$result\n";
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print $output "result:end\n";
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2011-02-01 01:41:51 +01:00
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if(not defined $USE_LOCAL or $USE_LOCAL == 0) {
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print "input: ";
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next;
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} else {
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exit;
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}
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2011-01-26 02:59:19 +01:00
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}
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if($line =~ m/^compile:\s*(.*)/) {
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my $options = $1;
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$user_args = undef;
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$user_input = undef;
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$lang = undef;
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($lang, $user_args, $user_input) = split /:/, $options;
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$code = "";
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$lang = "C99" if not defined $lang;
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$user_args = "" if not defined $user_args;
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$user_input = "" if not defined $user_input;
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print "Setting lang [$lang]; [$user_args]; [$user_input]\n";
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next;
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}
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$code .= $line . "\n";
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}
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close $input;
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close $output;
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}
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sub interpret {
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my ($lang, $code, $user_args, $user_input) = @_;
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print "lang: [$lang], code: [$code], user_args: [$user_args], input: [$user_input]\n";
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$lang = uc $lang;
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if(not exists $languages{$lang}) {
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return "No support for language '$lang' at this time.\n";
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}
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open(my $fh, '>', $languages{$lang}{'file'}) or die $!;
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print $fh $code . "\n";
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close $fh;
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my $cmdline = $languages{$lang}{'cmdline'};
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if(length $user_args) {
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print "Replacing args with $user_args\n";
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$user_args = quotemeta($user_args);
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$user_args =~ s/\\ / /g;
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$cmdline =~ s/\$args/$user_args/;
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} else {
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$cmdline =~ s/\$args/$languages{$lang}{'args'}/;
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}
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$cmdline =~ s/\$file/$languages{$lang}{'file'}/;
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print "Executing [$cmdline]\n";
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my ($ret, $result) = execute(60, $cmdline);
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2011-02-01 01:41:51 +01:00
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# print "Got result: ($ret) [$result]\n";
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2011-01-26 02:59:19 +01:00
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2011-02-01 01:41:51 +01:00
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# if exit code was not 0, then there was a problem compiling, such as an error diagnostic
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# so return the compiler output
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2011-01-26 02:59:19 +01:00
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if($ret != 0) {
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return $result;
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}
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my $output = "";
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2011-02-01 01:41:51 +01:00
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# no errors compiling, but if $result contains something, it must be a warning message
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# so prepend it to the output
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2011-01-26 02:59:19 +01:00
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if(length $result) {
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$result =~ s/^\s+//;
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$result =~ s/\s+$//;
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$output = "[$result]\n";
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}
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($ret, $result) = execute(5, "./compiler_watchdog.pl");
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$result =~ s/^\s+//;
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$result =~ s/\s+$//;
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2011-02-01 01:41:51 +01:00
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# print "Executed prog; got result: ($ret) [$result]\n";
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2011-01-26 02:59:19 +01:00
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if(not length $result) {
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$result = "Success (no output).\n" if $ret == 0;
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$result = "Success (exit code $ret).\n" if $ret != 0;
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}
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return $output . "\n" . $result;
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}
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sub execute {
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my $timeout = shift @_;
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my ($cmdline) = @_;
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my ($ret, $result);
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($ret, $result) = eval {
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print "eval\n";
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my $result = '';
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my $pid = open(my $fh, '-|', "$cmdline 2>&1");
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local $SIG{ALRM} = sub { print "Time out\n"; kill 'TERM', $pid; die "$result [Timed-out]\n"; };
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alarm($timeout);
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while(my $line = <$fh>) {
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$result .= $line;
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}
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close $fh;
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my $ret = $? >> 8;
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alarm 0;
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return ($ret, $result);
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};
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print "done eval\n";
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alarm 0;
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if($@ =~ /Timed-out/) {
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return (-1, $@);
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}
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print "[$ret, $result]\n";
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return ($ret, $result);
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}
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runserver;
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