mirror of
https://github.com/pragma-/pbot.git
synced 2024-11-25 13:29:29 +01:00
333 lines
9.7 KiB
Perl
Executable File
Vendored
333 lines
9.7 KiB
Perl
Executable File
Vendored
#!/usr/bin/env perl
|
|
|
|
# SPDX-FileCopyrightText: 2013-2023 Pragmatic Software <pragma78@gmail.com>
|
|
# SPDX-License-Identifier: MIT
|
|
|
|
use warnings;
|
|
use strict;
|
|
use feature "switch";
|
|
no if $] >= 5.018, warnings => 'experimental';
|
|
|
|
use IPC::Open2;
|
|
use Text::Balanced qw(extract_bracketed extract_delimited);
|
|
use IO::Socket;
|
|
use LWP::UserAgent;
|
|
|
|
my $debug = 0;
|
|
|
|
my $USE_LOCAL = defined $ENV{'CC_LOCAL'};
|
|
|
|
my $output = "";
|
|
my $nooutput = 'No output.';
|
|
|
|
if ($#ARGV < 0) {
|
|
print "Usage: expand <code>\n";
|
|
exit 0;
|
|
}
|
|
|
|
my $code = join ' ', @ARGV;
|
|
my $lang = 'C89';
|
|
my $args = "";
|
|
|
|
print " code: [$code]\n" if $debug;
|
|
|
|
# replace \n outside of quotes with literal newline
|
|
my $new_code = "";
|
|
|
|
use constant {
|
|
NORMAL => 0,
|
|
DOUBLE_QUOTED => 1,
|
|
SINGLE_QUOTED => 2,
|
|
};
|
|
|
|
my $state = NORMAL;
|
|
my $escaped = 0;
|
|
|
|
while ($code =~ m/(.)/gs) {
|
|
my $ch = $1;
|
|
|
|
given ($ch) {
|
|
when ('\\') {
|
|
if ($escaped == 0) {
|
|
$escaped = 1;
|
|
next;
|
|
}
|
|
}
|
|
|
|
if ($state == NORMAL) {
|
|
when ($_ eq '"' and not $escaped) { $state = DOUBLE_QUOTED; }
|
|
|
|
when ($_ eq "'" and not $escaped) { $state = SINGLE_QUOTED; }
|
|
|
|
when ($_ eq 'n' and $escaped == 1) {
|
|
$ch = "\n";
|
|
$escaped = 0;
|
|
}
|
|
}
|
|
|
|
if ($state == DOUBLE_QUOTED) {
|
|
when ($_ eq '"' and not $escaped) { $state = NORMAL; }
|
|
}
|
|
|
|
if ($state == SINGLE_QUOTED) {
|
|
when ($_ eq "'" and not $escaped) { $state = NORMAL; }
|
|
}
|
|
}
|
|
|
|
$new_code .= '\\' and $escaped = 0 if $escaped;
|
|
$new_code .= $ch;
|
|
}
|
|
|
|
$code = $new_code;
|
|
|
|
print "code after \\n replacement: [$code]\n" if $debug;
|
|
|
|
my $single_quote = 0;
|
|
my $double_quote = 0;
|
|
my $parens = 0;
|
|
my $cpp = 0; # preprocessor
|
|
|
|
$escaped = 0;
|
|
|
|
while ($code =~ m/(.)/msg) {
|
|
my $ch = $1;
|
|
my $pos = pos $code;
|
|
|
|
print "adding newlines, ch = [$ch], parens: $parens, cpp: $cpp, single: $single_quote, double: $double_quote, escaped: $escaped, pos: $pos\n" if $debug >= 10;
|
|
|
|
if ($ch eq '\\') { $escaped = not $escaped; }
|
|
elsif ($ch eq '#' and not $cpp and not $escaped and not $single_quote and not $double_quote) {
|
|
$cpp = 1;
|
|
|
|
if ($code =~ m/include\s*[<"]([^>"]*)[>"]/msg) {
|
|
my $match = $1;
|
|
$pos = pos $code;
|
|
substr($code, $pos, 0) = "\n";
|
|
pos $code = $pos;
|
|
$cpp = 0;
|
|
} else {
|
|
pos $code = $pos;
|
|
}
|
|
} elsif ($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 $cpp and not $single_quote and not $double_quote and $parens == 0) {
|
|
if (not substr($code, $pos, 1) =~ m/[\n\r]/) {
|
|
substr($code, $pos, 0) = "\n";
|
|
pos $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 $debug >= 10;
|
|
substr($code, $pos - 2, 2) = "\n";
|
|
pos $code = $pos;
|
|
$cpp = 0;
|
|
}
|
|
$escaped = 0;
|
|
} elsif ($ch eq '{' and not $cpp and not $single_quote and not $double_quote) {
|
|
if (not substr($code, $pos, 1) =~ m/[\n\r]/) {
|
|
substr($code, $pos, 0) = "\n";
|
|
pos $code = $pos + 1;
|
|
}
|
|
} elsif ($ch eq '}' and not $cpp and not $single_quote and not $double_quote) {
|
|
if (not substr($code, $pos, 1) =~ m/[\n\r;]/) {
|
|
substr($code, $pos, 0) = "\n";
|
|
pos $code = $pos + 1;
|
|
}
|
|
} elsif ($ch eq "\n" and $cpp and not $single_quote and not $double_quote) {
|
|
$cpp = 0;
|
|
} else {
|
|
$escaped = 0;
|
|
}
|
|
}
|
|
|
|
print "code after \\n additions: [$code]\n" if $debug;
|
|
|
|
#$code =~ s/#include [<"'].*?['">]//gm;
|
|
|
|
print "code after include removal: [$code]\n" if $debug;
|
|
|
|
my $precode = $code;
|
|
$code = '';
|
|
|
|
print "--- precode: [$precode]\n" if $debug;
|
|
|
|
my $has_main = 0;
|
|
if ($lang eq 'C89' or $lang eq 'C99' or $lang eq 'C11' or $lang eq 'C++') {
|
|
my $prelude = "#include <stdio.h>\n#include <stddef.h>\n#include <stdlib.h>\n";
|
|
while ($precode =~ s/^\s*(#.*\n{1,2})//g) { $prelude .= $1; }
|
|
|
|
print "*** prelude: [$prelude]\n precode: [$precode]\n" if $debug;
|
|
|
|
my $preprecode = $precode;
|
|
|
|
# white-out contents of quoted literals
|
|
$preprecode =~ s/(?:\"((?:\\\"|(?!\").)*)\")/'"' . ('-' x length $1) . '"'/ge;
|
|
$preprecode =~ s/(?:\'((?:\\\'|(?!\').)*)\')/"'" . ('-' x length $1) . "'"/ge;
|
|
|
|
# strip C and C++ style comments
|
|
if ($lang eq 'C89' or $args =~ m/-std=(gnu89|c89)/i) {
|
|
$preprecode =~ s#/\*[^*]*\*+([^/*][^*]*\*+)*/# #gs;
|
|
$preprecode =~ s#|//([^\\]|[^\n][\n]?)*?\n|("(\\.|[^"\\])*"|'(\\.|[^'\\])*'|.[^/"'\\]*)#defined $2 ? $2 : ""#gse;
|
|
} else {
|
|
$preprecode =~ s#|//([^\\]|[^\n][\n]?)*?\n|("(\\.|[^"\\])*"|'(\\.|[^'\\])*'|.[^/"'\\]*)#defined $2 ? $2 : ""#gse;
|
|
$preprecode =~ s#/\*[^*]*\*+([^/*][^*]*\*+)*/# #gs;
|
|
}
|
|
|
|
print "preprecode: [$preprecode]\n" if $debug;
|
|
|
|
print "looking for functions, has main: $has_main\n" if $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, $4);
|
|
|
|
print "looking for functions, found [$pre_ret][$pre_ident][$pre_params][$pre_potential_body], has main: $has_main\n" if $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 $debug;
|
|
|
|
$precode = substr($precode, 0, $extract_pos);
|
|
print "precode: [$precode]\n" if $debug;
|
|
|
|
$tmpcode =~ m/$func_regex/ms;
|
|
my ($ret, $ident, $params, $potential_body) = ($1, $2, $3, $4);
|
|
|
|
print "1st extract: [$ret][$ident][$params][$potential_body]\n" if $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 $extract[0]) {
|
|
if ($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 $debug;
|
|
$code .= "$ret $ident($params) $body\n\n";
|
|
$has_main = 1 if $ident eq 'main';
|
|
}
|
|
|
|
$precode =~ s/^\s+//;
|
|
$precode =~ s/\s+$//;
|
|
|
|
$precode =~ s/^{(.*)}$/$1/s;
|
|
|
|
if (not $has_main) {
|
|
$code = "$prelude\n$code" . "int main(void) {\n$precode\n}\n";
|
|
$nooutput = "No warnings, errors or output.";
|
|
} else {
|
|
print "code: [$code]; precode: [$precode]\n" if $debug;
|
|
$code = "$prelude\n$precode\n\n$code\n";
|
|
$nooutput = "No warnings, errors or output.";
|
|
}
|
|
} else {
|
|
$code = $precode;
|
|
}
|
|
|
|
print "after func extract, code: [$code]\n" if $debug;
|
|
|
|
$code =~ s/\|n/\n/g;
|
|
$code =~ s/^\s+//;
|
|
$code =~ s/\s+$//;
|
|
$code =~ s/(\{|})\n\s*;\n/$1\n/gs;
|
|
$code =~ s/(?:\n\n)+/\n\n/g;
|
|
|
|
print "final code: [$code]\n" if $debug;
|
|
|
|
open my $fh, ">prog.c" or die "Couldn't write prog.c: $!";
|
|
print $fh $code;
|
|
close $fh;
|
|
|
|
my ($ret, $result) = execute(2, "bash -c \"ulimit -t 1; gcc -E -ftrack-macro-expansion=0 prog.c\"");
|
|
|
|
$result =~ s/.*# \d+ "prog.c"(\s+\d+)*//ms;
|
|
$result =~ s/^#.*$//gm;
|
|
$result =~ s/[\n\r]/ /gm;
|
|
$result =~ s/\s+/ /gm;
|
|
|
|
print "result: [$result]\n" if $debug;
|
|
|
|
if (not $has_main) {
|
|
$result =~ s/\s*int main\(void\) \{//;
|
|
$result =~ s/\s*\}\s*$//;
|
|
}
|
|
|
|
$output = length $result ? $result : $nooutput;
|
|
|
|
print "$output\n";
|
|
|
|
sub execute {
|
|
my $timeout = shift @_;
|
|
my ($cmdline) = @_;
|
|
|
|
my ($ret, $result);
|
|
|
|
($ret, $result) = eval {
|
|
print "eval\n" if $debug;
|
|
|
|
my $result = '';
|
|
|
|
my $pid = open(my $fh, '-|', "$cmdline 2>&1");
|
|
|
|
local $SIG{ALRM} = sub { print "Time out\n" if $debug; kill 'TERM', $pid; die "$result [Timed-out]\n"; };
|
|
alarm($timeout);
|
|
|
|
while (my $line = <$fh>) { $result .= $line; }
|
|
|
|
close $fh;
|
|
my $ret = $? >> 8;
|
|
alarm 0;
|
|
return ($ret, $result);
|
|
};
|
|
|
|
print "done eval\n" if $debug;
|
|
alarm 0;
|
|
|
|
if ($@ =~ /Timed-out/) { return (-1, $@); }
|
|
|
|
print "[$ret, $result]\n" if $debug;
|
|
return ($ret, $result);
|
|
}
|
|
|