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Can any one help me for converting the below code of Perl to C#?
 

use strict;
 
my $usage = <<EOS;
Allpairs prepares test cases to cover all pairings of a set of variables.
 
EXE usage: allpairs datafile
Script usage: perl allpairs.pl datafile
 
"datafile" is a tab delimited text file that consists of labelled columns
of variables. The first row of the table is treated as labels.
If you copy from Excel into a text file it will be the right format.
 
Example: allpairs test.txt
 
...where test.txt contains:
 
colors cars times
purple Mazda night
blue Ford day
silver dawn
 
...will produce this output:
 

TEST CASES
case colors cars times pairings
1 purple Mazda night 3
2 purple Ford day 3
3 blue Ford night 3
4 blue Mazda day 3
5 silver Mazda dawn 3
6 silver Ford night 2
7 purple Ford dawn 2
8 blue ~Mazda dawn 1
9 silver ~Mazda day 1
 
PAIRING DETAILS
var1 var2 value1 value2 appearances cases
colors times purple night 1 1
colors times purple day 1 2
colors times purple dawn 1 7
colors times blue night 1 3
colors times blue day 1 4
colors times blue dawn 1 8
colors times silver night 1 6
colors times silver day 1 9
colors times silver dawn 1 5
colors cars purple Mazda 1 1
colors cars purple Ford 2 2, 7
colors cars blue Mazda 2 4, 8
colors cars blue Ford 1 3
colors cars silver Mazda 2 5, 9
colors cars silver Ford 1 6
times cars night Mazda 1 1
times cars night Ford 2 3, 6
times cars day Mazda 2 4, 9
times cars day Ford 1 2
times cars dawn Mazda 2 5, 8
times cars dawn Ford 1 7
 
EOS
 
our @neededvalues = ();
our @vars = ();
our %labels = ();
our @labels = ();
our %lists = ();
our %listorder = ();
our @listorder = ();
our %pairs = ();
our %pairscases = ();
our @zeroes = ("","0","00","000");
our $slug = "";
 
my $count = 1;
my $file = shift @ARGV || die $usage;
maketables($file, "tables"); # read the datafile and fill the arrays with each variable.
 
populate(); # make the checklists for the pairs.
 
# This loop creates the "slug" which is the blank test case filled in by the recursive FINDNEXT routine.
#
for (my $c=0;$c<scalar(@vars);$c++)>
{
$slug .= "x\t";
}
chop $slug;
 
# print first line of the output table.
#
print "TEST CASES\n";
print "case\t";
@labels = gettable("tables","labels");
foreach (sort byoriginal @labels)
{
print "$_\t";
}
print "pairings\n";
 
# find each test case, then show the status of all the pairings
#
while(more())
{
@neededvalues = ();
my $case = findnext($slug);
 
print $count."\t".readable($case).score($case)."\n";
checkin($case, $count++);
}
status();
 

####################
# END OF MAIN CODE #
####################
 
# This routine counts the unique pairings in a test case.
#
sub score
{
my $score = 0;
my $case = $_[0];
my @casevalues = split /\t/, $case;
my ($c, $v) = 0;
for ($c=0;$c<scalar(@vars)-1;$c++)>
{
for ($v=$c+1;$v<scalar(@vars);$v++)>
{
$score++ if (${$pairs{"$c-$v"}}{$casevalues[$c]."-".$casevalues[$v]} == 0);
}
}
return $score;
}
 
# This routine records all the new pairings in a test case in the checklists.
#
sub checkin
{
my ($c, $v) = 0;
my $case = $_[0];
my $casenumber = $_[1];
my @casevalues = split /\t/, $case;
for ($c=0;$c<scalar(@vars)-1;$c++)>
{
for ($v=$c+1;$v<scalar(@vars);$v++)>
{
${$pairs{"$c-$v"}}{$casevalues[$c]."-".$casevalues[$v]}++;
push @{${$pairscases{"$c-$v"}}{$casevalues[$c]."-".$casevalues[$v]}}, $casenumber;
}
}
}
 
# This routine creates the checklists of pairs.
#
sub populate
{
my ($c, $v, $x, $y) = 0;
for ($c=0;$c<scalar(@vars)-1;$c++)>
{
for ($v=$c+1;$v<scalar(@vars);$v++)>
{
for ($x=0;$x<$vars[$c];$x++)
{
for ($y=0;$y<$vars[$v];$y++)
{
${$pairs{"$c-$v"}}{$x."-".$y} = 0;
}
}
}
}
}
 
# This recursive routine walks through all the values of all the variables, trying to construct
# a test case with the highest number of unique pairings.
#
sub findnext
{
my ($c, $v, $x, $y) = 0;
my $case = shift;
my @casevalues = split /\t/, $case;
my @scores = ();
my @scorestrings = ();
my $best = "x";
 
# find the unfinished part of the test case.
for ($c=0;$c<scalar(@vars);$c++)>
{
last if ($casevalues[$c] eq "x");
}
 
# but if no part is unfinished, then we're done.
return $case if ($c == scalar(@vars));
 
# let's walk through the values for the particular variable we have to choose.
for ($x=0;$x<$vars[$c];$x++)
{
@scores = ();
 
# let's check the current variable paired against the all the other values.
for ($v=0;$v<scalar(@vars);$v++)>
{
# but don't check it against itself.
if ($v == $c) {$scores[$v] = 0; next}
 
# for any variable we've already chosen, we already know the pairing status
# and we just add that to the score.
if ($v < $c)
{
$scores[$v] = ${$pairs{"$v-$c"}}{$casevalues[$v]."-".$x};
}
 
# for the variables we haven't yet chosen, we walk through those values and see what the best pairing score will be.
else
{
$best = "x";
for ($y=0;$y<$vars[$v];$y++)
{
$best = ${$pairs{"$c-$v"}}{$x."-".$y} if ($best eq "x" || ${$pairs{"$c-$v"}}{$x."-".$y} < $best)
}
$scores[$v] = $best+0;
}
}
 
# now create a sorted string of scores for the value ($x) of current variable ($c) vs. values ($y) of each other variable ($v)
#foreach (@scores) {print "value:$_\n"}
foreach (sort @scores)
{
$scorestrings[$x] .= $zeroes[4-length($_)].$_."\t";
}
chop $scorestrings[$x];
$scorestrings[$x] .= ":".$zeroes[4-length($x)].$x;
}
 
# the scores for each choice are now in a set of strings of the form {score}:{choice}.
# the next step is to sort the scorestrings, pick the best, and record that choice...
$casevalues[$c] = (split /:/,(sort @scorestrings)[0])[1]+0;
 
# this monstrousity of a line of code records whether the best choice is a needed value or not. If the best choice
# results in no unique pairings, then we call it "N" meaning it's the best choice, but really doesn't matter.
$neededvalues[$c] = ((sort(split /\t/,(split /:/,(sort @scorestrings)[0])[0]))[1] == 0) ? "Y" : "N";
 
# now construct the test case string and call findnext again.
$case = "";
foreach (@casevalues)
{
$case .= $_."\t";
}
chop $case;
 
# after the recursion bottoms out, it will unwind via this return statement.
return findnext($case);
}
 
# This routine displays the status of the pairing checklists.
#
sub status
{
my ($c, $v, $x, $y) = 0;
print "\nPAIRING DETAILS\n";
print "var1\tvar2\tvalue1\tvalue2\tappearances\tcases\n";
for ($c=0;$c<scalar(@vars)-1;$c++)>
{
for ($v=$c+1;$v<scalar(@vars);$v++)>
{
for ($x=0;$x<$vars[$c];$x++)
{
for ($y=0;$y<$vars[$v];$y++)
{
print $labels[$c]."\t".
$labels[$v]."\t".
(gettable("tables",$c))[$x]."\t".
(gettable("tables",$v))[$y]."\t".
${$pairs{"$c-$v"}}{$x."-".$y}."\t";
my $comma = "";
foreach (@{$pairscases{"$c-$v"}{$x."-".$y}})
{
print $comma."$_";
$comma = ", ";
}
print "\n";
}
}
}
}
}
 
# This routine returns true if there are any unpaired variables left to pack into a test case.
#
sub more
{
my ($c, $v, $x, $y) = 0;
for ($c=0;$c<scalar(@vars)-1;$c++)>
{
for ($v=$c+1;$v<scalar(@vars);$v++)>
{
for ($x=0;$x<$vars[$c];$x++)
{
for ($y=0;$y<$vars[$v];$y++)
{
if (${$pairs{"$c-$v"}}{$x."-".$y} == 0) {return 1};
}
}
}
}
return 0;
}
 
# This routine turns a tab delimited table of variables into a set of hashes containing arrays.
#
sub maketables
{
# populates array LABELS and hash LISTS indexed by table name. Multiple tables can be processed, that way.
my ($file, $tablename) = @_;
my $index = 0;
my $count = 0;
my $numoftabs = 0;
 
open (DATA, $file) || die "Can't open $file";
my @data = ;
close DATA;

my $label = shift @data;
if ($label !~ /\t/) {die "Error: The first line of the file must be a tab-delimited list of labels with more than one label in it, and no blank labels.\n"}
if ($label =~ /\t\t/) {die "Error: Missing column label or extraneous tabs in the first line of the file. The first line of the file must be a tab-delimited list of labels with more than one label in it, and no blank labels.\n"}
foreach(split /\t/, $label)
{
chomp $_;
if (exists($listorder{$_})) {die "Each column must have a unique label. Column \"$_\" is not unique.\n"}
else
{
$listorder{$_} = $count++;
}
push @{$labels{$tablename}}, $_;
}

foreach (@data)
{
$index = 0;
$numoftabs = s/\t/\t/g;
$numoftabs++;
if ($numoftabs != $count){die "Error in the table. This row:\n\n$_\nhas $numoftabs columns instead of $count.\n\nThe data table should be tab delimited. Each row of the table must have the same number of columns as the first row (the label row). Check for extra tabs or spurious lines in the table.\n"}
foreach(split /\t/)
{
chomp $_;
if ($_ ne "") {push @{$lists{${$labels{$tablename}}[$index]}}, $_;}
$index++;
}
}
 
# reorder the variable lists by size, because the allpairs algorithm works better that way.
@{$labels{$tablename}} = sort bysize @{$labels{$tablename}};
$index = 0;
foreach (@{$labels{$tablename}})
{
$listorder[$listorder{$_}] = $index++;
}
for ($index=0;$index<scalar(@{$labels{$tablename}});$index++)>
{
$vars[$index] = scalar(@{$lists{${$labels{$tablename}}[$index]}});
}
print "\n";

}
 
# To make the code easier to work with, this routine extracts a list from the hash of lists.
# That way, we can do what we want to do by saying $mylist[0] instead of ${$lists{${$labels{$tablename}}[$index]}}[0]
#
sub gettable
{
my ($tablename,$index) = @_;
if ($index eq "labels")
{ return @{$labels{$tablename}} }
return @{$lists{${$labels{$tablename}}[$index]}};
}
 
# This routine translates the variable value indexes into their readable labels.
#
sub readable
{
my $case = shift;
my $newcase = "";
my $t = 0;
my @list = split /\t/, $case;
for ($t=0;$t<scalar(@list);$t++)>
{
if ($neededvalues[$listorder[$t]] eq "N") {$newcase .= "~"} # "~" is the don't care symbol.
$newcase .= (gettable("tables",$listorder[$t]))[$list[$listorder[$t]]]."\t";
}
return $newcase;
}
 
# sort routine to order lists according the number of elements in the list.
#
sub bysize
{
scalar(@{$lists{$b}}) <=> scalar(@{$lists{$a}});
}
 
# sort routine to order lists according the number of elements in the list.
#
sub byoriginal
{
$listorder{$a} <=> $listorder{$b};
}
Posted 30-Nov-12 21:15pm

1 solution

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Solution 1

Hi,
 
You can easily do this task with c# without converting perl script. At first understand the logic of above code.Your output shows that it generate all the possibilities of color,car,time which is based on your test cases and text.txt file.
 
--SJ
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