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## Library for the Simplestore format
## Copyright © 2009 by Daniel Friesel <derf@derf.homelinux.org>
## License: WTFPL <http://sam.zoy.org/wtfpl>
use strict;
use warnings;
use Carp;
our (@ISA, @EXPORT, $VERSION);
require Exporter;
@ISA = ('Exporter');
@EXPORT = ('load', 'save');
$VERSION = '1.0';
sub load {
my $file = shift;
my ($store, $key, $value);
$store = shift if @_;
open(my $handle, '<', $file) or confess("Cannot read $file: $!");
while (<$handle>) {
chomp;
/^(\S+)\s+(.*)$/ or next;
($key, $value) = ($1, $2);
if (exists($store->{$key})) {
$store->{$key} .= "\n$value";
} else {
$store->{$key} = $value;
}
}
close($handle);
return($store);
}
sub save {
my ($file, $store) = @_;
my $key;
open(my $handle, '>', $file) or confess("Cannot open $file: $!");
foreach $key (keys(%$store)) {
foreach (split(/\n/, $store->{$key})) {
print $handle "$key\t$_\n";
}
}
close($handle);
}
1;
__END__
=head1 NAME
Simplestore - simple storage format for hash refs
=head1 SYNOPSIS
use Simplestore;
# somefile contains:
# word purrl
# foo eggs
my $hash = load('somefile');
say $hash->{word}; # purrl
$hash->{foo} = 'bar';
$hash->{word} = "Yeah, this is more thon one\nword, I know";
save('somefile', $hash);
# somefile contains:
# word Yeah, this is more than one
# word word, I know
# foo bar
=head1 DESCRIPTION
B<Simplestore> is a perl library to store hashes in a very simple,
easy-to-parse file format.
=head1 FUNCTIONS
=over
=item B<load>(I<storefile>[, I<hashref>])
Load the hash saved in I<storefile>. Returns a hash ref containing the hash
saved in I<storefile>.
If I<hashref> is specified, I<storefile> will not be loaded into an empty hash,
but into I<hashref>. However, keys in I<storefile> overwrite those in I<hashref>.
=item B<save>(I<storefile>, I<hashref>)
save I<hashref> in I<storefile>. Returns nothing.
=back
=head1 COPYRIGHT
Copyright (C) 2009 by Daniel Friesel.
Licensed under the terms of the WTFPL <http://sam.zoy.org/wtfpl>.
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