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#!/usr/bin/perl -w

die "One arg plz (dat/descript/foo.txt), m'kay?\n" if $#ARGV;

my $dbname = $ARGV[0];
die "Must be a db (.txt).\n" unless $dbname =~ /^(.*)\.txt$/;

open IN, "<", $dbname or die "Can't open $dbname\n";
undef $/;
$_ = <IN>;
close IN;

open KEY, ">", "$1.key" or die "Can't write to $1.key\n";
open VAL, ">", "$1.val" or die "Can't write to $1.val\n";

for (split /%%%%\n/s)
{
    if (/(.+?)\n\n(.*)/s)
    {
        print KEY "$1\n%%%%\n";
        print VAL "$2%%%%\n";
    }
    else
    {
        print KEY "$_%%%%\n";
        print VAL "%%%%\n";
    }
}

close KEY;
close VAL;