Gecko [ paroquia-rio-de-mouro.pt ]

Name	Size	Permission	Date
App	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Archive	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Attribute	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
B	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
CPAN	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Carp	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Class	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Compress	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Config	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
DBM_Filter	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Devel	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Digest	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Encode	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Exporter	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
ExtUtils	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
File	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Filter	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Getopt	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
HTTP	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
I18N	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
IO	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
IPC	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
JSON	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Locale	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Math	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Memoize	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Module	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Net	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Params	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Parse	[ DIR ]	drwxr-xr-x	2016-11-15 15:18
Perl	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
PerlIO	[ DIR ]	drwxr-xr-x	2016-11-15 15:18
Pod	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Search	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
TAP	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Term	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Test	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Text	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Thread	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Tie	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Time	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
Unicode	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
User	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
autodie	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
encoding	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
overload	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
pod	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
unicore	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
version	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
warnings	[ DIR ]	drwxr-xr-x	2020-10-27 07:29
AnyDBM_File.pm	2.56 KB	-rw-r--r--	2020-10-19 12:57
AutoLoader.pm	5.36 KB	-rw-r--r--	2020-10-19 12:57
AutoSplit.pm	19.18 KB	-rw-r--r--	2020-10-19 12:57
Benchmark.pm	29.64 KB	-rw-r--r--	2020-10-19 12:57
CORE.pod	3.19 KB	-rw-r--r--	2020-10-19 12:57
CPAN.pm	136.68 KB	-rw-r--r--	2020-10-19 12:57
Carp.pm	19.6 KB	-rw-r--r--	2020-10-19 12:57
DB.pm	18.48 KB	-rw-r--r--	2020-10-19 12:57
DBM_Filter.pm	14.05 KB	-rw-r--r--	2020-10-19 12:57
Digest.pm	10.35 KB	-rw-r--r--	2020-10-19 12:57
DirHandle.pm	1.52 KB	-rw-r--r--	2020-10-19 12:57
Dumpvalue.pm	16.5 KB	-rw-r--r--	2020-10-19 12:57
English.pm	4.64 KB	-rw-r--r--	2020-10-19 12:57
Env.pm	5.39 KB	-rw-r--r--	2020-10-19 12:57
Exporter.pm	2.31 KB	-rw-r--r--	2020-10-19 12:57
Fatal.pm	59.2 KB	-rw-r--r--	2020-10-19 12:57
FileCache.pm	5.44 KB	-rw-r--r--	2020-10-19 12:57
FileHandle.pm	2.06 KB	-rw-r--r--	2020-10-19 12:57
FindBin.pm	4.45 KB	-rw-r--r--	2020-10-19 12:57
Memoize.pm	35.28 KB	-rw-r--r--	2020-10-19 12:57
NEXT.pm	18.05 KB	-rw-r--r--	2020-10-19 12:57
PerlIO.pm	10.21 KB	-rw-r--r--	2020-10-19 12:57
Safe.pm	24.4 KB	-rw-r--r--	2020-10-19 12:57
SelectSaver.pm	344 B	-rw-r--r--	2020-10-19 12:57
SelfLoader.pm	17.41 KB	-rw-r--r--	2020-10-19 12:57
Symbol.pm	2.05 KB	-rw-r--r--	2020-10-19 12:57
Test.pm	28.12 KB	-rw-r--r--	2020-10-19 12:57
Thread.pm	8.09 KB	-rw-r--r--	2020-10-19 12:57
UNIVERSAL.pm	6.44 KB	-rw-r--r--	2020-10-19 12:57
XSLoader.pm	3.95 KB	-rw-r--r--	2020-10-19 12:57
_charnames.pm	32.7 KB	-rw-r--r--	2020-10-19 12:57
autodie.pm	12.58 KB	-rw-r--r--	2020-10-19 12:57
autouse.pm	4.14 KB	-rw-r--r--	2020-10-19 12:57
base.pm	5.21 KB	-rw-r--r--	2020-10-19 12:57
bigint.pm	18.9 KB	-rw-r--r--	2020-10-19 12:57
bignum.pm	18.34 KB	-rw-r--r--	2020-10-19 12:57
bigrat.pm	14.23 KB	-rw-r--r--	2020-10-19 12:57
blib.pm	2.04 KB	-rw-r--r--	2020-10-19 12:57
bytes.pm	447 B	-rw-r--r--	2020-10-19 12:57
bytes_heavy.pl	758 B	-rw-r--r--	2020-10-19 12:57
charnames.pm	20.5 KB	-rw-r--r--	2020-10-19 12:57
constant.pm	5.6 KB	-rw-r--r--	2020-10-19 12:57
deprecate.pm	3.43 KB	-rw-r--r--	2020-10-19 12:57
diagnostics.pm	18.26 KB	-rw-r--r--	2020-10-19 12:57
dumpvar.pl	15.19 KB	-rw-r--r--	2020-10-19 12:57
experimental.pm	5.39 KB	-rw-r--r--	2020-10-19 12:57
feature.pm	4.08 KB	-rw-r--r--	2020-10-19 12:57
fields.pm	4.87 KB	-rw-r--r--	2020-10-19 12:57
filetest.pm	3.91 KB	-rw-r--r--	2020-10-19 12:57
if.pm	2.98 KB	-rw-r--r--	2020-10-19 12:57
integer.pm	172 B	-rw-r--r--	2020-10-19 12:57
less.pm	3.13 KB	-rw-r--r--	2020-10-19 12:57
locale.pm	2.81 KB	-rw-r--r--	2020-10-19 12:57
meta_notation.pm	2.17 KB	-rw-r--r--	2020-10-19 12:57
ok.pm	968 B	-rw-r--r--	2020-10-19 12:57
open.pm	7.83 KB	-rw-r--r--	2020-10-19 12:57
overload.pm	4.36 KB	-rw-r--r--	2020-10-19 12:57
overloading.pm	964 B	-rw-r--r--	2020-10-19 12:57
parent.pm	607 B	-rw-r--r--	2020-10-19 12:57
perl5db.pl	308.3 KB	-rw-r--r--	2020-10-19 12:57
perlfaq.pm	78 B	-rw-r--r--	2020-10-19 12:57
sigtrap.pm	7.43 KB	-rw-r--r--	2020-10-19 12:57
sort.pm	5.94 KB	-rw-r--r--	2020-10-19 12:57
strict.pm	1.48 KB	-rw-r--r--	2020-10-19 12:57
subs.pm	848 B	-rw-r--r--	2020-10-19 12:57
utf8.pm	342 B	-rw-r--r--	2020-10-19 12:57
utf8_heavy.pl	31.25 KB	-rw-r--r--	2020-10-19 12:57
vars.pm	1.12 KB	-rw-r--r--	2020-10-19 12:57
version.pm	1.58 KB	-rw-r--r--	2020-10-19 12:57
version.pod	9.62 KB	-rw-r--r--	2020-10-19 12:57
vmsish.pm	4.21 KB	-rw-r--r--	2020-10-19 12:57
warnings.pm	21.49 KB	-rw-r--r--	2020-10-19 12:57

Rename

package AnyDBM_File;
use warnings;
use strict;

use 5.006_001;
our $VERSION = '1.01';
our @ISA = qw(NDBM_File DB_File GDBM_File SDBM_File ODBM_File) unless @ISA;

my $mod;
for $mod (@ISA) {
    if (eval "require $mod") {
	@ISA = ($mod);	# if we leave @ISA alone, warnings abound
	return 1;
    }
}

die "No DBM package was successfully found or installed";

__END__

=head1 NAME

AnyDBM_File - provide framework for multiple DBMs

NDBM_File, DB_File, GDBM_File, SDBM_File, ODBM_File - various DBM implementations

=head1 SYNOPSIS

use AnyDBM_File;

=head1 DESCRIPTION

This module is a "pure virtual base class"--it has nothing of its own.
It's just there to inherit from one of the various DBM packages.  It
prefers ndbm for compatibility reasons with Perl 4, then Berkeley DB (See
L<DB_File>), GDBM, SDBM (which is always there--it comes with Perl), and
finally ODBM.   This way old programs that used to use NDBM via dbmopen()
can still do so, but new ones can reorder @ISA:

BEGIN { @AnyDBM_File::ISA = qw(DB_File GDBM_File NDBM_File) }
    use AnyDBM_File;

Having multiple DBM implementations makes it trivial to copy database formats:

use Fcntl; use NDBM_File; use DB_File;
    tie %newhash,  'DB_File', $new_filename, O_CREAT|O_RDWR;
    tie %oldhash,  'NDBM_File', $old_filename, 1, 0;
    %newhash = %oldhash;

=head2 DBM Comparisons

Here's a partial table of features the different packages offer:

odbm    ndbm    sdbm    gdbm    bsd-db
			 ----	 ----    ----    ----    ------
 Linkage comes w/ perl   yes     yes     yes     yes     yes
 Src comes w/ perl       no      no      yes     no      no
 Comes w/ many unix os   yes     yes[0]  no      no      no
 Builds ok on !unix      ?       ?       yes     yes     ?
 Code Size               ?       ?       small   big     big
 Database Size           ?       ?       small   big?    ok[1]
 Speed                   ?       ?       slow    ok      fast
 FTPable                 no      no      yes     yes     yes
 Easy to build          N/A     N/A      yes     yes     ok[2]
 Size limits             1k      4k      1k[3]   none    none
 Byte-order independent  no      no      no      no      yes
 Licensing restrictions  ?       ?       no      yes     no

=over 4

=item [0]

on mixed universe machines, may be in the bsd compat library,
which is often shunned.

=item [1]

Can be trimmed if you compile for one access method.

=item [2]

See L<DB_File>. 
Requires symbolic links.

=item [3]

By default, but can be redefined.

=back

=head1 SEE ALSO

dbm(3), ndbm(3), DB_File(3), L<perldbmfilter>

=cut