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plpy.pl
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plpy.pl
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#!/usr/bin/perl -w
# written by [email protected] September 2016
# Assignment 1 for COMP2041/9041
# http://cgi.cse.unsw.edu.au/~cs2041/assignments/plpy/
# Task to translate PERL Code to PYTHON Code
# Variable and Regex definitions
# $comment_code_regex = qr/(.*\"[^"]*\#[^"]*\"\;)(#.*)/;
# $commentline_regex = qr/(.*)([^"']*#[^"']*)/;
$comment_regex = qr/(?:(^\s*#.*)|(^\s*$))/;
$print_regex = qr/^\s*print\s*\"(.*)\\n\"[\s;]*$/i;
$print_without_nl_regex = qr/^\s*print\s*"(.*)"[\s;]*$/i;
$print_only_var_without_nl_regex = qr/^\s*print\s*([^"]*)[\s;]*$/i;
$print_only_var_regex = qr/^\s*print\s*([^"]*)\s*,\s*".*\\n"[\s;]*$/i;
$ctrlstmtrgx = qr/(?:^\s*[#}]*\s*(while|if|elsif|else if|else|elif|foreach|for))/im;
# $match_perl_line_endings = qr/[;\s]*$/;
my $pytabindent = 0; # The print tab index for python
my @pyarray; # Global python array which needs to be printed at the end
my %import; # Global Hash that has the imports necessary for python
my @loopexpression; # Global variable which remembers the expression for the next iteration
# of the loop when using a C style for loop
my %vartype;
##### Some help was provided by Matt from this website for using negative lookahead assertions #####
##### http://www.regextester.com/15 #####
my $poprgx = qr/pop\s*\(?\s*@?([\w:\[\]\.]+)\s*\)?/;
my $pushrgx = qr/push\s*\(?\s*@?([\w:\[\]\.]+)\s*,\s*[@\$]?([\w:\[\]\.]+)\s*\)?/;
my $shiftrgx = qr/shift\s*\(?@?([\w:\[\]\.]+)/;
# my $joinrgx = qr/join\s*\(\s*([^(join)]*?)\s*,\s*(?:(?:\(?\s*@?(\w+)\s*\)?)|\((.*?)\))\s*\)/;
# my $joinrgx = qr/join\s*\(\s*([^(join)]*?)\s*,\s*\(?\s*@?([\w\.\[\]:]+)\s*\)/;
my $joinrgx = qr/join\s*\(\s*((?:(?!join).)*)\s*,\s*\(?\s*@?([\w\.\[\]:]+)\s*\)/;
my $splitrgx = qr/split\s*\(?\s*\/((?:(?!split).)*)\/\s*,\s*[\@\$](\w+)\s*,?\,\s*(\d+)\s*\)?/;
my $splitrgxnolimit = qr/split\s*\(?\s*\/((?:(?!split).)*)\/\s*,\s*[\@\$](\w+)\s*,?\,?\s*\)?/;
my $reversergx = qr/reverse\s*@?([\w.:\[\]]+)/;
my $subrgx = '(\w+)\s*=~\s*s\/([^/]*)\/([^/]*)\/(\w*)';
my $scalarrgx = qr/scalar\s*\(?\s*\@(\w+)\s*\)?/;
my $scalarrgx_sys = qr/scalar\s*\(?\s*(sys\.argv\[1\:\])\s*\)?/;
my %arraymanipulatecmds = (
"1" => "join",
"2" => "split",
"3" => "pop",
"4" => "push",
"5" => "shift",
"6" => "unshift",
"7" => "reverse",
"8" => "scalar",
);
my $i;
my @cmdarr;
my $cmd = join ('|', values (%arraymanipulatecmds));
my @x1y1z1bg1;
my $endbrace = qr/#*\s*}\s*$/;
my $bracescount=0;
my @Cstylebraccnt;
my $indent = "\t";
my %stdinvariables;
my %arithmeticops = (
"gt" => ">",
"lt" => "<",
"le" => "<=",
"ge" => ">=",
"eq" => "==",
"ne" => "!=",
);
my $allarithops = join ('|', values(%arithmeticops));
sub handle_shebang
{
my ($trans) = @_;
if ($line =~ /^#!/ && $. == 1)
{
# translate #! Shebang line
push (@pyarray, "#!/usr/local/bin/python3.5 -u\n");
return 0;
}
return 1;
}
##### If its a comment leave it as it is #####
sub handle_comment
{
my ($trans) = @_;
if ($trans =~ /$comment_regex/)
{
$trans .="\n";
push(@pyarray, $trans);
return 0;
}
return 1;
}
sub handle_print
{
my ($trans) = @_;
my $variable_print;
my $tmp;
my $variable_in_print_regex = qr/\$(\w*\b)/;
my $substitute_dollar_at = qr/([\$\@])(\w*\b)/;
my $r;
my $loc;
##### Handle any join/split/shift/etc... #####
if ( $trans =~ /print/)
{
##### Join #####
if ($trans =~ /$joinrgx/)
{
$trans =~ s/$joinrgx/\($1\)\.join\($2\)/g;
$trans =~ s/,\s*\"\\n\"\s*;\s*$//;
$trans =~ s/\s*;\s*$//;
$trans =~ s/print(.*)/print\($1\)/;
push @pyarray,$trans."\n";
return 0;
}
##### Split #####
if ( $trans =~ /$splitrgx/)
{
my $temp = $3-1;
$trans =~ s/$splitrgx/$2\.split\(\'$1\',$temp\)/g;
}
elsif ( $trans =~ /$splitrgxnolimit/)
{
$trans =~ s/$splitrgxnolimit/$2\.split\(\'$1\'\)/g;
}
##### Shift #####
if ( $trans =~ /$shiftrgx/)
{
if ( $1 ne "sys\.argv\[1\:\]")
{
$trans =~ s/$shiftrgx/$1\[0\]/g;
# $trans = $trans."\n$1 = $1\[1\:\]\n";
}
else
{
$trans =~ s/$shiftrgx/sys\.argv\[0\]/g;
# $trans = $trans."\nsys.argv = sys\.argv\[1\:\]\n";
}
}
##### PUSH #####
if ( $trans =~ /$pushrgx/)
{
$trans =~ s/$pushrgx/$1\.append\($2\)/g;
}
##### POP #####
if ( $trans =~ /$poprgx/)
{
$trans =~ s/$poprgx/$1\.pop\(\)/g;
}
##### Reverse #####
if ( $trans =~/$reversergx/)
{
$trans =~ s/$reversergx/$1\.reverse\(\)/g;
}
##### Scalar #####
if ( $trans =~ /($scalarrgx|$scalarrgx_sys)/ )
{
$trans = handle_scalar($trans);
}
}
##### print simple variables if the line only has variables without newline #####
if ($trans =~ /$print_only_var_without_nl_regex/)
{
# print "TRY 1";
my $temp;
$variable_print = $1;
# @variables = $trans =~ /\$(\w*\b)/g;
$variable_print =~ s/$substitute_dollar_at/$2/g;
$variable_print =~ s/[;\s]*$//g;
$temp = "print\($variable_print,end=\"\"\)\n";
push (@pyarray,$temp);
return 0;
}
##### print simple variables if the line only has variables with newline #####
elsif ($trans =~ /$print_only_var_regex/)
{
# print "TRY 2";
$variable_print = $1;
$variable_print =~ s/$substitute_dollar_at/$2/g;
$variable_print =~ s/[;\s]*$//g;
$temp = "print\( $variable_print \)\n";
push (@pyarray,$temp);
return 0;
}
##### print plain strings below which have a newline in them #####
if ($trans =~ /$print_regex/)
{
# print "TRY 3";
$variable_print = "print\(\"$1\"\) ";
@variables = $trans =~ /\$(\w*\b)/g;
# @variables = $trans =~ /(?:\$(\w+)\[\$([^[\[\]]+)\])|(?:\$(\w+))/g;
# @arrayvariables = $trans =~ /s/;
# print $trans;
if ($variable_print =~ /$variable_in_print_regex/)
{
# print "TRY 4";
if(!defined $vartype{$1})
{
$vartype{$1} = '%d';
}
$variable_print =~ s/$variable_in_print_regex/$vartype{$1}/ge;
$variable_print =~ s/\)[;\s]*$//;
if(scalar @variables == 1)
{
# print "TRY 5";
$temp = "$variable_print \%@variables \)\n";
}
else
{
# print "TRY 6";
$r = join (",",@variables);
$temp = "$variable_print \%\($r\) \)\n";
}
push (@pyarray, $temp);
}
else
{
# print "TRY 7";
$temp = $variable_print."\n";
push(@pyarray,$temp);
}
return 0;
}
#print plain strings below which have no newline in them
elsif ($trans =~ /$print_without_nl_regex/)
{
$variable_print = "print\(\"$1\""; # print(BLAH, end="")
@variables = $trans =~ /\$(\w*\b)/g;
if ($variable_print =~ /$variable_in_print_regex/)
{
if(!defined $vartype{$1})
{
$vartype{$1} = '%d';
}
$variable_print =~ s/$variable_in_print_regex/$vartype{$1}/ge;
$variable_print =~ s/\)[;\s]*$//;
if(scalar @variables == 1)
{
# print "TRY 5";
$temp = "$variable_print \%@variables ,end=\"\"\)\n";
}
else
{
# print "TRY 6";
$r = join (",",@variables);
$temp = "$variable_print \%\($r\),end=\"\"\)\n";
}
# $temp = "$variable_print \%$tmp,end=\"\"\)\n";
push(@pyarray,$temp);
}
else
{
$temp = "$variable_print,end=\"\"\)\n";
push(@pyarray,$temp);
}
return 0;
}
return 1;
}
sub handle_pp_mm
{
my ($trans) = @_;
my $transformed = 1;
##### Transforming ++ to +=1 #####
if ($trans =~ /\+\+/)
{
$trans =~ s/\+\+/\+=1/g;
$trans =~ s/(\$)(.*?)/$2/g; # replacing $var with var
$trans =~ s/[\s;]*$//; # remove ; from the end
$transformed = 0;
}
##### Transforming -- to -=1 #####
if ( $trans =~ /\-\-/)
{
$trans =~ s/\-\-/\-=1/g;
$trans =~ s/(\$)(.*?)/$2/g; # replacing $var with var
$trans =~ s/[\s;]*$//; # remove ; from the end
$transformed = 0;
}
return ($transformed, $trans);
}
sub handle_join
{
my ($trans) = @_;
my $transformed = 1;
##### Transforming $str = join('blah',@arr) -> str = arr.join('blah') #####
if ($trans =~ /$joinrgx/)
{
if (defined $3)
{
$trans =~ s/$joinrgx/\($1\)\.join\($3\)/g;
$trans = "\($1\)\.join\($3\)";
}
else
{
$trans =~ s/$joinrgx/\($1\)\.join\($2\)/g;
$trans = "\($1\)\.join\($2\)";
}
}
return $trans;
}
sub handle_split
{
my ($trans) = @_;
##### Transforming $str = split (/pat/ , exp, limit ) into exp.split('pat',limit) #####
if ( $trans =~ /$splitrgx/)
{
my $temp = $3-1;
# $trans =~ s/$splitrgx/$2\.split\(\'$1\',$temp\)/g;
$trans = "$2\.split\(\'$1\',$temp\)";
}
elsif ( $trans =~ /$splitrgxnolimit/)
{
# $trans =~ s/$splitrgxnolimit/$2\.split\(\'$1\'\)/g;
$trans = "$2\.split\(\'$1\'\)";
}
return $trans;
}
sub handle_pop
{
my ($trans) = @_;
if ( $trans =~ /$poprgx/)
{
$trans =~ s/$poprgx/$1\.pop\(\)/g;
$trans = "$1\.pop\(\)";
}
return ($trans);
}
sub handle_push
{
my ($trans) = @_;
if ( $trans =~ /$pushrgx/g)
{
$trans =~ s/$pushrgx/$1\.append\($2\)/g;
$trans = "$1\.append\($2\)";
}
return $trans;
}
sub handle_shift
{
my ($trans) = @_;
if ( $trans =~ /$shiftrgx/)
{
if ( $1 ne "sys\.argv\[1\:\]")
{
$trans = "$1\[0\]\n";
$trans .= "$1 = $1\[1\:\]";
}
else
{
$trans = "sys.argv[0]\n";
$trans .= "sys.argv = sys\.argv\[1\:\]"
}
}
return $trans;
}
sub handle_reverse
{
my ($trans) = @_;
if ( $trans =~ /$reversergx/)
{
$trans = "$1.reverse\(\)";
}
return $trans;
}
sub handle_sub
{
my ($trans) = @_;
if ( $trans =~ /$subrgx/)
{
$trans =~ s/$subrgx/$1 = re\.sub\(\"$2\",\"$3\",$1\)/;
$import{"import re\n"} = 1;
}
return $trans;
}
sub handle_scalar
{
my ($trans) = @_;
if ( $trans =~ /$scalarrgx/)
{
$trans =~ s/$scalarrgx/len($1)/g;
}
elsif ( $trans =~ /$scalarrgx_sys/)
{
$trans =~ s/$scalarrgx_sys/len(sys\.argv\[1\:\])/g;
}
return $trans;
}
sub handle_arrayprocess
{
my ($a) = @_;
$assignmentvar = "";
##### Finds all the array manipulation commands used #####
if ( $a =~ /$cmd/)
{
@cmdarr = ($a =~ /$cmd/g);
##### getting the assignment variable if any #####
if ($a =~ /[\$\@](\w+)\s*=/ )
{
$assignmentvar = $1;
}
}
foreach $i (reverse @cmdarr)
{
my $glob;
if ( $i eq "pop")
{
push @x1y1z1bg1, handle_pop($a);
$glob = '@x1y1z1bg1';
$a =~ s/$poprgx/$glob/;
}
elsif ( $i eq "push" )
{
push @x1y1z1bg1, handle_push($a);
$glob = '@x1y1z1bg1';
$a =~ s/$pushrgx/$glob/;
}
elsif ( $i eq "join")
{
push @x1y1z1bg1, handle_join($a);
$glob = '@x1y1z1bg1';
$a =~ s/$joinrgx/$glob/;
}
elsif ( $i eq "split")
{
push @x1y1z1bg1, handle_split($a);
$glob = '@x1y1z1bg1';
$a =~ s/($splitrgx|$splitrgxnolimit)/$glob/;
}
elsif ( $i eq "shift")
{
push @x1y1z1bg1, handle_shift($a);
$glob = '@x1y1z1bg1';
$a =~ s/$shiftrgx/$glob/;
}
elsif ($i eq "reverse")
{
push @x1y1z1bg1, handle_reverse($a);
$glob = '@x1y1z1bg1';
$a =~ s/$reversergx/$glob/;
}
elsif ( $i eq "scalar")
{
push @x1y1z1bg1, handle_scalar($a);
$glob = '@x1y1z1bg1';
$a =~ s/($scalarrgx|$scalarrgx_sys)/$glob/;
}
}
my $final = $x1y1z1bg1[0];
while (@x1y1z1bg1)
{
my $temp = shift (@x1y1z1bg1);
$temp =~ s/x1y1z1bg1/$final/;
$final = $temp;
}
if ( $assignmentvar ne "")
{$final = $assignmentvar."=".$final;}
if ( !defined $final )
{return "";}
else
{return $final;}
}
##### Transforms $#array to len(array) #####
sub convert_dollar_hash
{
my ($trans) =@_;
if ($trans =~ /\$?\#(\w+)/)
{
my $tempvar = $1;
if ( $tempvar eq ARGV)
{$trans =~ s/\$?\#ARGV/len\(sys.argv\)/g;}
else
{
$trans =~ s/\$?\#(\w+)/len\($1\)/g; # Replaces #$array with len(array)
}
$import{"import sys\n"} = 1;
}
return $trans;
}
##### Transforms @ARGV to sys.argv[1:] #####
sub convert_ARGV
{
my ($trans) =@_;
if ($trans =~ /@ARGV/)
{
$trans =~ s/\@ARGV/sys.argv[1:]/g;
$import{"import sys\n"} = 1;
}
return $trans;
}
sub handle_variable
{
##### Transforms $variable to variable #####
my ($trans) = @_;
my $var;
my $t1 = 1;
my $t2 = 1;
my $t3 = 1;
my $t4 = 1;
my $t5 = 1;
my $t6 = 1;
##### Handle i++s and i--s in the expression #####
($t1, $trans) = handle_pp_mm($trans);
##### Handle STDIN in the expression #####
if ( $trans =~ /STDIN|(<>)/)
{
$trans = handle_stdin($trans); # If <STDIN> is found changes it to sys.readline()
$t5 = 0;
}
##### Converting $#ARGV to len(sys.argv) #####
if ($trans =~ /\$\#(\w+)/)
{
$trans = convert_dollar_hash($trans);
$t6 = 0;
}
##### converting $variable to variable and assigning type to the variable using a hash $vartype #####
my @arrs;
my $myvarinitrgx = qr/(?:my)?\s*\$(\w+)\s*=(.*)/;
my $myarrinitrgx = qr/(?:my)?\s*\@(\w+)\s*(=)?(.*)/;
if ($trans =~ /^(?:my)?\s*[\$\@](.*)/)
{
@var = $trans =~ /\$(\w+)/g; # Extracting variable names
@arrs = $trans =~ /\@(\w+)/g; # Extracting array names
##### Replace my $test = "name" with test = "name" #####
if ($trans =~ /$myvarinitrgx/)
{
$trans =~ s/$myvarinitrgx/$1=$2/g;
}
if ($trans =~ /$myarrinitrgx/)
{
if ( defined $2 )
{
my $tmp = $3;
$tmp =~ tr/()/[]/;
$trans =~ s/$myarrinitrgx/$1=$tmp/g;
}
else
{
$trans =~ s/$myarrinitrgx/$1=\[\]/g;
}
}
$trans =~ s/([\$\@])(.*?)/$2/g; # replacing $var/@arr with var/arr
foreach $i (@var) # this loop determines the variable type and places them in a hash
{
if ($trans =~ /$i[^.]+\.(\d)/)
{$vartype{$i} = '%f';} # Float
elsif ($trans =~ /(?:$i.+\".*\")|($i[^+|-|%|*]*\w+)/)
{$vartype{$i} = '%s';} # String
else
{$vartype{$i} = '%d';} # Default Integer
if ($trans =~ /(?:$allarithops)|(?:\+=|-=|\*=|\*\*=|\/=|%=)/)
{$vartype{$i} = '%d';} # Default Integer
}
$t3 = 0;
}
my @localvar;
if( $trans =~ /@\s*(\w+)/) # looks for @ARGV and changes to sys.argv[1:]
{ # Also gets rid of the sigil for arrays
@localvar = $trans =~ /\s*@\s*(\w+)\s*/g;
# print @localvar;
$trans =~ s/(@\s*)(\w+)/$2/g;
$trans =~ s/\s*ARGV/sys\.argv\[1:\]/g;
$t4 = 0;
}
##### Handles substitutions $var =~ s///; #####
if ( $trans =~ /$subrgx/)
{
$trans = handle_sub($trans);
$t2 = 0;
}
$transformed = $t1 & $t2 & $t3 & $t4 & $t5 & $t6;
if ( $transformed == 0 )
{
$trans =~ s/[\s;]*$//; # Removes ; at the end
push (@pyarray,$trans."\n");
}
return $transformed;
}
sub handle_operators
{
##### Hash to handle different logical operators for python #####
my %operators = (
"\\|\\|" => "or",
"&&" => "and",
"gt" => ">",
"lt" => "<",
"le" => "<=",
"ge" => ">=",
"eq" => "==",
"ne" => "!=",
"not" => "!",
);
my ($ctrlstmts) = @_;
my $j;
##### Loop through the operators and perform the change
foreach $j (keys %operators)
{
if ( $j eq "\\|\\|" || $j eq "&&")
{
$ctrlstmts =~ s/$j/$operators{$j}/ge; # replace by the value
}
elsif ( $ctrlstmts =~ /\b$j\b/ )
{
$ctrlstmts =~ s/$j/$operators{$j}/ge; # replace by the value
}
if ( $ctrlstmts =~ /\!\s*\w+/ )
{
$ctrlstmts =~ s/(\!)\s*/not\ /g;
}
}
return $ctrlstmts;
}
sub handle_for
{
my ($string) = @_;
my $for_regex = qr/(?:for|foreach)(?:\s+(?:my)?\s+|\s+)(\w+?)\s+\((.*)\)/;
if ($string =~ /\$?\#(\w+)/)
{
$string = convert_dollar_hash($string);
}
if ($string =~ /$for_regex/ )
{
my $ind = $1;
my $arr = $2;
$string =~ s/foreach/for/; # convert Foreach to for
if ( $arr =~ /\s*(\d+)\s*\.\.\s*(.*)\s*/)
{
my $startrange = $1;
my $temp = $2;
if ( $temp =~ /\d+/) # Extract range 0..9
{$temp += 1;}
$arr = "range($startrange,$temp)";
}
# Extract Array information er @ARGV
elsif ( $arr =~ /@?([\w\.]+)/)
{
$arr = $1;
if( $arr eq "sys\.argv")
{
$import{"import sys\n"} = 1;
$arr = "sys.argv[1:]";
$vartype{$ind} = '%s';
}
}
$string = "for $ind in $arr :";
}
if ( $string =~ /\s*(?:for|foreach)\s*\((.*?);(.*?);(.*?)\)/)
{
my $var;
##### The following section of code had insights from this forum contribution #####
##### http://www.perlmonks.org/?node_id=723825 #####
my $init;
my $condition;
my $exp;
##### Handle i++s and i--s in the expression
($var, $string) = handle_pp_mm($string);
($init,$condition,$exp) = $string =~ /\s*(?:for|foreach)\s*\(\s*(.*?)\s*;\s*(.*?)\s*;\s*(.*?)\s*\)/ ;
$condition = 'while'." $condition :";
if ($init =~ /#/)
{
$init =~ s/#(\w+)/len($1)/g;
}
$string = $init."\n".$condition."\n"."\t";
push (@loopexpression, $exp); # push expressions onto an array and print before the closing braces;
}
return $string;
}
##### Function to handle input from stdin #####
sub handle_stdin
{
my ($trans) = @_;
##### if of the form while ( $line = <STDIN|FH> ) #####
if ($trans =~ /while\s*\(\s*(\w*?)\s*[=]?\s*<\s*(\w*)\s*>\s*\)/)
{
if ($2 eq "STDIN")
{
$import{"import sys\n"}=1;
$trans = "for $1 in sys.stdin:"
# $vartype{$1} = '%s';
}
elsif ($2 eq "")
{
# Handle other files
$import{"import fileinput\n"} = 1;
$trans = "for $1 in fileinput\.input\(\):";
$vartype{$1} = '%s';
}
}
##### if of the form while ( $line = <STDIN|FH> ) #####
elsif ( $trans =~ /(\w+)\s*=\s*<\s*(\w*)\s*>/ )
{
if( $2 eq "STDIN")
{
$import{"import sys\n"}=1;
$trans = "$1 = sys.stdin.readline\(\)";
}
elsif ( $2 eq "")
{
$import{"import fileinput\n"} = 1;
$trans = "$1 = fileinput.input\(\)";
}
}
return $trans;
}
##### This function has derived a lot of information from the following two webpages #####
##### https://www.tutorialspoint.com/perl/perl_operators.htm #####
##### http://www.tutorialspoint.com/python/python_basic_operators.htm #####
sub handle_controlstatements
{
##### Transforms $variable to variable #####
my ($trans) = @_;
my $transformed = 1;
##### Handle open braces #####
if ( $trans =~ /{?\s*$/ )
{$trans =~ s/\s*{?$/\:/;}
##### Handle control statements #####
if ( $trans =~ /$ctrlstmtrgx/ )
{
if ( $trans =~ /^\s*}/)
{
$trans =~ s/^\s*}\s*//;
push (@pyarray,"}\n");
}
# if any control statements are found push onto the array
$trans =~ s/(\$)(.*?)/$2/g; # replacing all $var with var
##### Handle Operators #####
$trans = handle_operators($trans);
if ($trans =~ /elsif/)
{$trans =~ s/elsif/elif/g;}
# ##### Handle while (<>) #####
# if ( $trans =~ /while\s*\(\s*$?(\w+)\s*=\s*\<\>\s*\)/ )
# {
# $trans =~ s/while\s*\(\s*[$]?(\w+)\s*=\s*<>\s*\)/for $1 in file\.input\(\)\:/;
# }
##### Handle for loops #####
$trans = handle_for($trans);
##### Handle Operators #####
$trans = handle_stdin($trans);
$transformed = 0;
}
##### Handle last statements #####
if ( $trans =~ /last\s*;\s*}?\s*:*$/ )
{
$trans =~ s/last\s*;\s*:*}?\s*:*$/break/;
$transformed = 0;
}
##### Handle next statements #####
if ( $trans =~ /next\s*;\s*}?\s*:*$/ )
{
$trans =~ s/next\s*;\s*:*}?\s*:*$/continue/;
$transformed = 0;
}
##### Handle exit statements #####
if ( $trans =~ /exit\s*(\d*)\s*;\s*:*}?\s*:*$/ )
{
$trans =~ s/exit\s*(\d*)\s*;\s*:*}?\s*:*$/sys\.exit($1)/;
$import{"import sys\n"} = 1;
$transformed = 0;
}
if ($transformed == 0)
{ $trans =~ s/@(\w+)/$1/g;
push (@pyarray,$trans."\n");}
return $transformed;
}
##### handles CHOMP #####
sub handle_chomp
{
my ($trans) = @_;
my $transformed = 1;
if ( $trans =~ /chomp\s*[(]?\s*\$(\w+)\s*[)]?/ )
{
$import{"import sys\n"} = 1;
$trans = "$1 = $1.rstrip()";
push (@pyarray,$trans."\n");
$transformed = 0;
}
return $transformed;
}
sub handle_complex_closebrace
{
my ($line, $endbracesflag) = @_;
##### To detect statements with } in the same line #####
if ( $line =~ /^.*}\s*$/)
{
$line =~ s/^\t*\s*//;
if ( $line =~ /^(.*)}\s*$/ )
{
if ($1 ne "")
{
$line = $1."\n";
$endbracesflag = 1;
}
else
{
$endbracesflag = 0;
}
}
}
return ($line, $endbracesflag);
}
##### Assign var types #####
sub assignvartypes
{
my ($line) = @_;
my @var;
@var = $line =~ /\$(\w+)/g; # Extracting variable names
foreach $i (@var) # this loop determines the variable type and places them in a hash
{
if ( $line =~ /print/)
{next;}
if ($line =~ /$i.+(\d)\.(\d)/)
{
$vartype{$i} = '%f';
} # Float
elsif ($line =~ /(?:$i.+\".*\")/)
{
$vartype{$i} = '%s';
} # String
elsif ($line =~ /(?:$i.+\d+)/)
{
$vartype{$i} = '%d';
} # Default Integer
}
}
##### Main Code starts here... #####
my $tmp = "";
my $endbracesflag = 0;
while ($line = <>)
{
if ( $endbracesflag == 1 )
{
push (@pyarray , "}\n"); # Add } after the last line for complex statements like if ... }
}
chomp $line;
$endbracesflag = 0;
$line =~ s/^\s*{//; # Remove opening braces
($line, $endbracesflag) = handle_complex_closebrace($line, $endbracesflag);
assignvartypes($line); # Determine var types
if (!handle_shebang($line)) # Handle Shebang line and move to the next line
{next;}
if (!handle_comment($line)) # Handles Codes with Comments
{next;}
$line = convert_dollar_hash($line); # Converts $# to len()
$line = convert_ARGV($line); # Converts ARGV to sys.argv[1:]
if (!handle_print($line)) # Handles prints
{next;}
$tmp = handle_arrayprocess($line); # Handles array manipulations, checks every line
if ( $tmp eq $line || $tmp eq "" )
{}
else
{
push (@pyarray, $tmp."\n");