# DB_File.pm -- Perl 5 interface to Berkeley DB
#
-# written by Paul Marquess (Paul.Marquess@btinternet.com)
-# last modified 30th July 2001
-# version 1.78
+# written by Paul Marquess (pmqs@cpan.org)
+# last modified 28th October 2007
+# version 1.818
#
-# Copyright (c) 1995-2001 Paul Marquess. All rights reserved.
+# Copyright (c) 1995-2009 Paul Marquess. All rights reserved.
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
package DB_File::HASHINFO ;
-require 5.003 ;
+require 5.00404;
use warnings;
use strict;
{
my $pkg = shift ;
- bless { VALID => { map {$_, 1}
- qw( bsize ffactor nelem cachesize hash lorder)
+ bless { VALID => {
+ bsize => 1,
+ ffactor => 1,
+ nelem => 1,
+ cachesize => 1,
+ hash => 2,
+ lorder => 1,
},
GOT => {}
}, $pkg ;
my $key = shift ;
my $value = shift ;
- if ( exists $self->{VALID}{$key} )
+ my $type = $self->{VALID}{$key};
+
+ if ( $type )
{
+ croak "Key '$key' not associated with a code reference"
+ if $type == 2 && !ref $value && ref $value ne 'CODE';
$self->{GOT}{$key} = $value ;
return ;
}
{
my $pkg = shift ;
- bless { VALID => { map {$_, 1}
- qw( flags cachesize maxkeypage minkeypage psize
- compare prefix lorder )
+ bless { VALID => {
+ flags => 1,
+ cachesize => 1,
+ maxkeypage => 1,
+ minkeypage => 1,
+ psize => 1,
+ compare => 2,
+ prefix => 2,
+ lorder => 1,
},
GOT => {},
}, $pkg ;
use warnings;
use strict;
-use vars qw($VERSION @ISA @EXPORT $AUTOLOAD $DB_BTREE $DB_HASH $DB_RECNO
- $db_version $use_XSLoader
- ) ;
+our ($VERSION, @ISA, @EXPORT, $AUTOLOAD, $DB_BTREE, $DB_HASH, $DB_RECNO);
+our ($db_version, $use_XSLoader, $splice_end_array, $Error);
use Carp;
-$VERSION = "1.78" ;
+$VERSION = "1.820" ;
+$VERSION = eval $VERSION; # needed for dev releases
+
+{
+ local $SIG{__WARN__} = sub {$splice_end_array = "@_";};
+ my @a =(1); splice(@a, 3);
+ $splice_end_array =
+ ($splice_end_array =~ /^splice\(\) offset past end of array at /);
+}
#typedef enum { DB_BTREE, DB_HASH, DB_RECNO } DBTYPE;
$DB_BTREE = new DB_File::BTREEINFO ;
use AutoLoader;
BEGIN {
$use_XSLoader = 1 ;
- eval { require XSLoader } ;
+ { local $SIG{__DIE__} ; eval { require XSLoader } ; }
if ($@) {
$use_XSLoader = 0 ;
sub AUTOLOAD {
my($constname);
($constname = $AUTOLOAD) =~ s/.*:://;
- my $val = constant($constname, @_ ? $_[0] : 0);
- if ($! != 0) {
- if ($! =~ /Invalid/ || $!{EINVAL}) {
- $AutoLoader::AUTOLOAD = $AUTOLOAD;
- goto &AutoLoader::AUTOLOAD;
- }
- else {
- my($pack,$file,$line) = caller;
- croak "Your vendor has not defined DB macro $constname, used at $file line $line.
-";
- }
- }
- eval "sub $AUTOLOAD { $val }";
- goto &$AUTOLOAD;
-}
+ my ($error, $val) = constant($constname);
+ Carp::croak $error if $error;
+ no strict 'refs';
+ *{$AUTOLOAD} = sub { $val };
+ goto &{$AUTOLOAD};
+}
eval {
my (@arg) = @_ ;
my $tieHASH = ( (caller(1))[3] =~ /TIEHASH/ ) ;
+ use File::Spec;
+ $arg[1] = File::Spec->rel2abs($arg[1])
+ if defined $arg[1] ;
+
$arg[4] = tied %{ $arg[4] }
if @arg >= 5 && ref $arg[4] && $arg[4] =~ /=HASH/ && tied %{ $arg[4] } ;
- # make recno in Berkeley DB version 2 work like recno in version 1.
+ $arg[2] = O_CREAT()|O_RDWR() if @arg >=3 && ! defined $arg[2];
+ $arg[3] = 0666 if @arg >=4 && ! defined $arg[3];
+
+ # make recno in Berkeley DB version 2 (or better) work like
+ # recno in version 1.
+ if ($db_version >= 4 and ! $tieHASH) {
+ $arg[2] |= O_CREAT();
+ }
+
if ($db_version > 1 and defined $arg[4] and $arg[4] =~ /RECNO/ and
$arg[1] and ! -e $arg[1]) {
open(FH, ">$arg[1]") or return undef ;
my $self = shift;
my $offset = shift;
if (not defined $offset) {
- carp 'Use of uninitialized value in splice';
+ warnings::warnif('uninitialized', 'Use of uninitialized value in splice');
$offset = 0;
}
$offset = $new_offset;
}
- if ($offset > $size) {
- $offset = $size;
- }
-
if (not defined $length) {
- carp 'Use of uninitialized value in splice';
+ warnings::warnif('uninitialized', 'Use of uninitialized value in splice');
$length = 0;
}
+ if ($offset > $size) {
+ $offset = $size;
+ warnings::warnif('misc', 'splice() offset past end of array')
+ if $splice_end_array;
+ }
+
# 'If LENGTH is omitted, removes everything from OFFSET onward.'
if (not defined $length) {
$length = $size - $offset;
B<DB_File> is a module which allows Perl programs to make use of the
facilities provided by Berkeley DB version 1.x (if you have a newer
-version of DB, see L<Using DB_File with Berkeley DB version 2 or 3>).
+version of DB, see L<Using DB_File with Berkeley DB version 2 or greater>).
It is assumed that you have a copy of the Berkeley DB manual pages at
hand when reading this documentation. The interface defined here
mirrors the Berkeley DB interface closely.
=back
-=head2 Using DB_File with Berkeley DB version 2 or 3
+=head2 Using DB_File with Berkeley DB version 2 or greater
Although B<DB_File> is intended to be used with Berkeley DB version 1,
-it can also be used with version 2 or 3. In this case the interface is
+it can also be used with version 2, 3 or 4. In this case the interface is
limited to the functionality provided by Berkeley DB 1.x. Anywhere the
-version 2 or 3 interface differs, B<DB_File> arranges for it to work
+version 2 or greater interface differs, B<DB_File> arranges for it to work
like version 1. This feature allows B<DB_File> scripts that were built
-with version 1 to be migrated to version 2 or 3 without any changes.
+with version 1 to be migrated to version 2 or greater without any changes.
If you want to make use of the new features available in Berkeley DB
2.x or greater, use the Perl module B<BerkeleyDB> instead.
-B<Note:> The database file format has changed in both Berkeley DB
-version 2 and 3. If you cannot recreate your databases, you must dump
-any existing databases with either the C<db_dump> or the C<db_dump185>
-utility that comes with Berkeley DB.
-Once you have rebuilt DB_File to use Berkeley DB version 2 or 3, your
-databases can be recreated using C<db_load>. Refer to the Berkeley DB
+B<Note:> The database file format has changed multiple times in Berkeley
+DB version 2, 3 and 4. If you cannot recreate your databases, you
+must dump any existing databases with either the C<db_dump> or the
+C<db_dump185> utility that comes with Berkeley DB.
+Once you have rebuilt DB_File to use Berkeley DB version 2 or greater,
+your databases can be recreated using C<db_load>. Refer to the Berkeley DB
documentation for further details.
-Please read L<"COPYRIGHT"> before using version 2.x or 3.x of Berkeley
+Please read L<"COPYRIGHT"> before using version 2.x or greater of Berkeley
DB with DB_File.
=head2 Interface to Berkeley DB
use warnings ;
use strict ;
use DB_File ;
- use vars qw( %h $k $v ) ;
+ our (%h, $k, $v) ;
unlink "fruit" ;
tie %h, "DB_File", "fruit", O_RDWR|O_CREAT, 0666, $DB_HASH
Duplicate keys are entirely defined by the comparison function.
In the case-insensitive example above, the keys: 'KEY' and 'key'
would be considered duplicates, and assigning to the second one
-would overwirte the first. If duplicates are allowed for (with the
-R_DUPS flag discussed below), only a single copy of duplicate keys
+would overwrite the first. If duplicates are allowed for (with the
+R_DUP flag discussed below), only a single copy of duplicate keys
is stored in the database --- so (again with example above) assigning
three values to the keys: 'KEY', 'Key', and 'key' would leave just
the first key: 'KEY' in the database with three values. For some
use strict ;
use DB_File ;
- use vars qw($filename %h ) ;
+ my ($filename, %h) ;
$filename = "tree" ;
unlink $filename ;
use strict ;
use DB_File ;
- use vars qw($filename $x %h $status $key $value) ;
+ my ($filename, $x, %h, $status, $key, $value) ;
$filename = "tree" ;
unlink $filename ;
use strict ;
use DB_File ;
- use vars qw($filename $x %h ) ;
+ my ($filename, $x, %h) ;
$filename = "tree" ;
use strict ;
use DB_File ;
- use vars qw($filename $x %h $found) ;
+ my ($filename, $x, %h, $found) ;
- my $filename = "tree" ;
+ $filename = "tree" ;
# Enable duplicate records
$DB_BTREE->{'flags'} = R_DUP ;
use strict ;
use DB_File ;
- use vars qw($filename $x %h $found) ;
+ my ($filename, $x, %h, $found) ;
- my $filename = "tree" ;
+ $filename = "tree" ;
# Enable duplicate records
$DB_BTREE->{'flags'} = R_DUP ;
use DB_File ;
use Fcntl ;
- use vars qw($filename $x %h $st $key $value) ;
+ my ($filename, $x, %h, $st, $key, $value) ;
sub match
{
space for fixed length records.
Also note that the bval option only allows you to specify a single byte
-as a delimeter.
+as a delimiter.
=head2 A Simple Example
=item B<$X-E<gt>splice(offset, length, elements);>
-Returns a splice of the the array.
+Returns a splice of the array.
=back
use warnings ;
use strict ;
- use vars qw(@h $H $file $i) ;
+ my (@h, $H, $file, $i) ;
use DB_File ;
use Fcntl ;
use DB_File ;
my %hash ;
- my $filename = "/tmp/filt" ;
+ my $filename = "filt" ;
unlink $filename ;
my $db = tie %hash, 'DB_File', $filename, O_CREAT|O_RDWR, 0666, $DB_HASH
a DBM database it always writes the key and value as strings. So when
you use this:
- $hash{12345} = "soemthing" ;
+ $hash{12345} = "something" ;
the key 12345 will get stored in the DBM database as the 5 byte string
"12345". If you actually want the key to be stored in the DBM database
use strict ;
use DB_File ;
my %hash ;
- my $filename = "/tmp/filt" ;
+ my $filename = "filt" ;
unlink $filename ;
The locking technique went like this.
- $db = tie(%db, 'DB_File', '/tmp/foo.db', O_CREAT|O_RDWR, 0666)
- || die "dbcreat /tmp/foo.db $!";
+ $db = tie(%db, 'DB_File', 'foo.db', O_CREAT|O_RDWR, 0644)
+ || die "dbcreat foo.db $!";
$fd = $db->fd;
open(DB_FH, "+<&=$fd") || die "dup $!";
flock (DB_FH, LOCK_EX) || die "flock: $!";
use DB_File ;
use Fcntl ;
- use vars qw( $dotdir $HISTORY %hist_db $href $binary_time $date ) ;
+ my ($dotdir, $HISTORY, %hist_db, $href, $binary_time, $date) ;
$dotdir = $ENV{HOME} || $ENV{LOGNAME};
$HISTORY = "$dotdir/.netscape/history.db";
use warnings ;
use strict ;
use DB_File ;
- use vars qw(%x) ;
+ my %x ;
tie %x, DB_File, "filename" ;
Running it produces the error in question:
the directory F<ext/DB_File>. Given the amount of time between releases
of Perl the version that ships with Perl is quite likely to be out of
date, so the most recent version can always be found on CPAN (see
-L<perlmod/CPAN> for details), in the directory
+L<perlmodlib/CPAN> for details), in the directory
F<modules/by-module/DB_File>.
This version of B<DB_File> will work with either version 1.x, 2.x or
3.x of Berkeley DB, but is limited to the functionality provided by
version 1.
-The official web site for Berkeley DB is F<http://www.sleepycat.com>.
+The official web site for Berkeley DB is F<http://www.oracle.com/technology/products/berkeley-db/db/index.html>.
All versions of Berkeley DB are available there.
Alternatively, Berkeley DB version 1 is available at your nearest CPAN
=head1 COPYRIGHT
-Copyright (c) 1995-2001 Paul Marquess. All rights reserved. This program
+Copyright (c) 1995-2007 Paul Marquess. All rights reserved. This program
is free software; you can redistribute it and/or modify it under the
same terms as Perl itself.
copyright and its own license. Please take the time to read it.
Here are are few words taken from the Berkeley DB FAQ (at
-F<http://www.sleepycat.com>) regarding the license:
+F<http://www.oracle.com/technology/products/berkeley-db/db/index.html>) regarding the license:
Do I have to license DB to use it in Perl scripts?
=head1 SEE ALSO
-L<perl(1)>, L<dbopen(3)>, L<hash(3)>, L<recno(3)>, L<btree(3)>,
-L<dbmfilter>
+L<perl>, L<dbopen(3)>, L<hash(3)>, L<recno(3)>, L<btree(3)>,
+L<perldbmfilter>
=head1 AUTHOR
The DB_File interface was written by Paul Marquess
-E<lt>Paul.Marquess@btinternet.comE<gt>.
-Questions about the DB system itself may be addressed to
-E<lt>db@sleepycat.com<gt>.
+E<lt>pmqs@cpan.orgE<gt>.
=cut
projects / p5sagit/p5-mst-13.2.git / blobdiff