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920dae64 AT |
1 | package DBM_Filter::compress ; |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | use Carp; | |
6 | ||
7 | our $VERSION = '0.01'; | |
8 | ||
9 | BEGIN | |
10 | { | |
11 | eval { require Compress::Zlib; Compress::Zlib->import() }; | |
12 | ||
13 | croak "Compress::Zlib module not found.\n" | |
14 | if $@; | |
15 | } | |
16 | ||
17 | ||
18 | ||
19 | sub Store { $_ = compress($_) } | |
20 | sub Fetch { $_ = uncompress($_) } | |
21 | ||
22 | 1; | |
23 | ||
24 | __END__ | |
25 | ||
26 | =head1 DBM_Filter::compress | |
27 | ||
28 | =head1 SYNOPSIS | |
29 | ||
30 | use SDBM_File; # or DB_File, or GDBM_File, or NDBM_File, or ODBM_File | |
31 | use DBM_Filter ; | |
32 | ||
33 | $db = tie %hash, ... | |
34 | $db->Filter_Push('compress'); | |
35 | ||
36 | =head1 DESCRIPTION | |
37 | ||
38 | This DBM filter will compress all data before it is written to the database | |
39 | and uncompressed it on reading. | |
40 | ||
41 | A fatal error will be thrown if the Compress::Zlib module is not | |
42 | available. | |
43 | ||
44 | =head1 SEE ALSO | |
45 | ||
46 | L<DBM_Filter>, L<perldbmfilter>, L<Compress::Zlib> | |
47 | ||
48 | =head1 AUTHOR | |
49 | ||
50 | Paul Marquess pmqs@cpan.org | |
51 |