#!/usr/bin/perl
#  
#  Copyright (c) 2002 Steve Slaven, All Rights Reserved.
#  
#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License as
#  published by the Free Software Foundation; either version 2 of
#  the License, or (at your option) any later version.
#  
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#  GNU General Public License for more details.
#  
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
#  MA 02111-1307 USA
#  

# A database exporter/importer for using the DB_File and tie()
use DB_File;
use Getopt::Std;

getopts( 'ieh', \%o );

die( qq{
dbexim v2.0
DB file export/import
Author: Steve Slave - http://hoopajoo.net

Usage: $0 [-hie] DBFILE

	-i import STDIN into DBFILE
	-e export DBFILE to STDOUT

Generates a plain text output of dbfile so that it can be imported
on another platform.  Doesn't use Data::Dumper because that requires
reading the whole file in to memory which is bad for large db files.

} ) if $o{ h };

die( 'Must use -i or -e' ) unless( $o{ i } || $o{ e } );

my $dbfile = shift( @ARGV );
tie %db, 'DB_File', $dbfile || die( "Couldn't tie '$dbfile': $!" );

if( $o{ i } ) {
	# Import
	print STDERR "Importing $txfile into $dbfile...\n";

	while( $line = <STDIN> ) {
		chomp( $line );
		( $k, $v ) = split( /:/, $line );
		$k = decode( $k );
		$v = decode( $v );
		print "$k => $v\n";
		$db{ $k } = $v;
	}
}elsif( $o{ e } ) {
	# Export
	$ref = \%db;
	print STDERR "Exporting $dbfile to $txfile...\n";
	while( ( $k, $v ) = each( %db ) ) {
		print encode( $k ), ":", encode( $v ), "\n";
	}
}

sub encode {
	return( join( ",", map { ord( $_ ) } split( //, shift() ) ) );
}

sub decode {
	return( join( "", map { chr( $_ ) } split( /,/, shift() ) ) );
}