# codeformat.pl
#
# CubicSpline
# 2001/10/13
#
# Purpose: Format perl source file in a particular shape.
#
# Run: perl codeformat.pl <perl source> <pattern file>

use strict;
use warnings;

# SOURCE reads in the perl source code
open SOURCE, $ARGV[0];

# PATTERN reads in the format text file
open PATTERN, $ARGV[1];

# make a single string that contains entire source
my $sourceline = join '', <SOURCE>;

# strip out newlines and tabs and create character array,
# reversed for popping.
$sourceline =~ s/\n|\t//g;
my @sourcechars = reverse split //,$sourceline;

close SOURCE;

my $output = "";
my $i;

# read in pattern file line by line
# for every non-space (ASCII 32) character
# output the next char of the source string.
while( <PATTERN> )
{
    chomp;
    my @patternchars = split //;
    for( $i = 0; $i <= $#patternchars;$i++)
    {
        $output .= $patternchars[$i] eq " " ? " " : pop @sourcechars;
    }
    $output .= "\n";
}

close PATTERN;

# print out the formatted source and any remaining
# source that didn't fit into the pattern.
print $output;
if( scalar(@sourcechars) > 0 )
{
   print "\n\n",scalar(@sourcechars)," Remaining: \n\n", reverse @sourcechars;
}