-;# $Id: Storable.pm,v 0.7.1.3 2000/08/23 22:49:25 ram Exp $
+;# $Id: Storable.pm,v 1.0.1.13 2001/12/01 13:34:49 ram Exp $
;#
;# Copyright (c) 1995-2000, Raphael Manfredi
;#
-;# You may redistribute only under the terms of the Artistic License,
-;# as specified in the README file that comes with the distribution.
+;# You may redistribute only under the same terms as Perl 5, as specified
+;# in the README file that comes with the distribution.
;#
;# $Log: Storable.pm,v $
-;# Revision 0.7.1.3 2000/08/23 22:49:25 ram
+;# Revision 1.0.1.13 2001/12/01 13:34:49 ram
+;# patch14: avoid requiring Fcntl upfront, useful to embedded runtimes
+;# patch14: store_fd() will now correctly autoflush file if needed
+;#
+;# Revision 1.0.1.12 2001/08/28 21:51:51 ram
+;# patch13: fixed truncation race with lock_retrieve() in lock_store()
+;#
+;# Revision 1.0.1.11 2001/07/01 11:22:14 ram
+;# patch12: systematically use "=over 4" for POD linters
+;# patch12: updated version number
+;#
+;# Revision 1.0.1.10 2001/03/15 00:20:25 ram
+;# patch11: updated version number
+;#
+;# Revision 1.0.1.9 2001/02/17 12:37:32 ram
+;# patch10: forgot to increase version number at previous patch
+;#
+;# Revision 1.0.1.8 2001/02/17 12:24:37 ram
+;# patch8: fixed incorrect error message
+;#
+;# Revision 1.0.1.7 2001/01/03 09:39:02 ram
+;# patch7: added CAN_FLOCK to determine whether we can flock() or not
+;#
+;# Revision 1.0.1.6 2000/11/05 17:20:25 ram
+;# patch6: increased version number
+;#
+;# Revision 1.0.1.5 2000/10/26 17:10:18 ram
+;# patch5: documented that store() and retrieve() can return undef
+;# patch5: added paragraph explaining the auto require for thaw hooks
+;#
+;# Revision 1.0.1.4 2000/10/23 18:02:57 ram
+;# patch4: protected calls to flock() for dos platform
+;# patch4: added logcarp emulation if they don't have Log::Agent
+;#
+;# Revision 1.0.1.3 2000/09/29 19:49:01 ram
;# patch3: updated version number
;#
-;# Revision 0.7.1.2 2000/08/14 07:18:40 ram
-;# patch2: increased version number
+;# Revision 1.0.1.2 2000/09/28 21:42:51 ram
+;# patch2: added lock_store lock_nstore lock_retrieve
;#
-;# Revision 0.7.1.1 2000/08/13 20:08:58 ram
-;# patch1: mention new Clone(3) extension in SEE ALSO
-;# patch1: contributor Marc Lehmann added overloading and ref to tied items
-;# patch1: updated e-mail from Benjamin Holzman
+;# Revision 1.0.1.1 2000/09/17 16:46:21 ram
+;# patch1: documented that doubles are stringified by nstore()
+;# patch1: added Salvador Ortiz Garcia in CREDITS section
;#
-;# Revision 0.7 2000/08/03 22:04:44 ram
-;# Baseline for second beta release.
+;# Revision 1.0 2000/09/01 19:40:41 ram
+;# Baseline for first official release.
;#
require DynaLoader;
@EXPORT = qw(store retrieve);
@EXPORT_OK = qw(
- nstore store_fd nstore_fd retrieve_fd
+ nstore store_fd nstore_fd fd_retrieve
freeze nfreeze thaw
dclone
+ retrieve_fd
+ lock_store lock_nstore lock_retrieve
);
use AutoLoader;
use vars qw($forgive_me $VERSION);
-$VERSION = '0.703';
+$VERSION = '2.0';
*AUTOLOAD = \&AutoLoader::AUTOLOAD; # Grrr...
#
eval "use Log::Agent";
-unless (defined @Log::Agent::EXPORT) {
- eval q{
- sub logcroak {
- require Carp;
- Carp::croak(@_);
- }
- };
+require Carp;
+
+#
+# They might miss :flock in Fcntl
+#
+
+BEGIN {
+ if (eval { require Fcntl; 1 } && exists $Fcntl::EXPORT_TAGS{'flock'}) {
+ Fcntl->import(':flock');
+ } else {
+ eval q{
+ sub LOCK_SH () {1}
+ sub LOCK_EX () {2}
+ };
+ }
}
-sub logcroak;
+# Can't Autoload cleanly as this clashes 8.3 with &retrieve
+sub retrieve_fd { &fd_retrieve } # Backward compatibility
-# 8.3 limitation avoidance trickery. --mjtguy
-sub retrieve_fd { goto &fdretrieve };
+# By default restricted hashes are downgraded on earlier perls.
+$Storable::downgrade_restricted = 1;
+$Storable::accept_future_minor = 1;
bootstrap Storable;
1;
__END__
+#
+# Use of Log::Agent is optional. If it hasn't imported these subs then
+# Autoloader will kindly supply our fallback implementation.
+#
+
+sub logcroak {
+ Carp::croak(@_);
+}
+
+sub logcarp {
+ Carp::carp(@_);
+}
+
+#
+# Determine whether locking is possible, but only when needed.
+#
+
+sub CAN_FLOCK; my $CAN_FLOCK; sub CAN_FLOCK {
+ return $CAN_FLOCK if defined $CAN_FLOCK;
+ require Config; import Config;
+ return $CAN_FLOCK =
+ $Config{'d_flock'} ||
+ $Config{'d_fcntl_can_lock'} ||
+ $Config{'d_lockf'};
+}
+
+sub show_file_magic {
+ print <<EOM;
+#
+# To recognize the data files of the Perl module Storable,
+# the following lines need to be added to the local magic(5) file,
+# usually either /usr/share/misc/magic or /etc/magic.
+#
+0 string perl-store perl Storable(v0.6) data
+>4 byte >0 (net-order %d)
+>>4 byte &01 (network-ordered)
+>>4 byte =3 (major 1)
+>>4 byte =2 (major 1)
+
+0 string pst0 perl Storable(v0.7) data
+>4 byte >0
+>>4 byte &01 (network-ordered)
+>>4 byte =5 (major 2)
+>>4 byte =4 (major 2)
+>>5 byte >0 (minor %d)
+EOM
+}
+
+sub read_magic {
+ my $header = shift;
+ return unless defined $header and length $header > 11;
+ my $result;
+ if ($header =~ s/^perl-store//) {
+ die "Can't deal with version 0 headers";
+ } elsif ($header =~ s/^pst0//) {
+ $result->{file} = 1;
+ }
+ # Assume it's a string.
+ my ($major, $minor, $bytelen) = unpack "C3", $header;
+
+ my $net_order = $major & 1;
+ $major >>= 1;
+ @$result{qw(major minor netorder)} = ($major, $minor, $net_order);
+
+ return $result if $net_order;
+
+ # I assume that it is rare to find v1 files, so this is an intentionally
+ # inefficient way of doing it, to make the rest of the code constant.
+ if ($major < 2) {
+ delete $result->{minor};
+ $header = '.' . $header;
+ $bytelen = $minor;
+ }
+
+ @$result{qw(byteorder intsize longsize ptrsize)} =
+ unpack "x3 A$bytelen C3", $header;
+
+ if ($major >= 2 and $minor >= 2) {
+ $result->{nvsize} = unpack "x6 x$bytelen C", $header;
+ }
+ $result;
+}
#
# store
# removed.
#
sub store {
- return _store(\&pstore, @_);
+ return _store(\&pstore, @_, 0);
}
#
# Same as store, but in network order.
#
sub nstore {
- return _store(\&net_pstore, @_);
+ return _store(\&net_pstore, @_, 0);
+}
+
+#
+# lock_store
+#
+# Same as store, but flock the file first (advisory locking).
+#
+sub lock_store {
+ return _store(\&pstore, @_, 1);
+}
+
+#
+# lock_nstore
+#
+# Same as nstore, but flock the file first (advisory locking).
+#
+sub lock_nstore {
+ return _store(\&net_pstore, @_, 1);
}
# Internal store to file routine
sub _store {
my $xsptr = shift;
my $self = shift;
- my ($file) = @_;
+ my ($file, $use_locking) = @_;
logcroak "not a reference" unless ref($self);
- logcroak "too many arguments" unless @_ == 1; # No @foo in arglist
+ logcroak "wrong argument number" unless @_ == 2; # No @foo in arglist
local *FILE;
- open(FILE, ">$file") || logcroak "can't create $file: $!";
+ if ($use_locking) {
+ open(FILE, ">>$file") || logcroak "can't write into $file: $!";
+ unless (&CAN_FLOCK) {
+ logcarp "Storable::lock_store: fcntl/flock emulation broken on $^O";
+ return undef;
+ }
+ flock(FILE, LOCK_EX) ||
+ logcroak "can't get exclusive lock on $file: $!";
+ truncate FILE, 0;
+ # Unlocking will happen when FILE is closed
+ } else {
+ open(FILE, ">$file") || logcroak "can't create $file: $!";
+ }
binmode FILE; # Archaic systems...
my $da = $@; # Don't mess if called from exception handler
my $ret;
# Call C routine nstore or pstore, depending on network order
eval { $ret = &$xsptr($file, $self) };
logcroak $@ if $@ =~ s/\.?\n$/,/;
+ local $\; print $file ''; # Autoflush the file if wanted
$@ = $da;
return $ret ? $ret : undef;
}
# object of that tree.
#
sub retrieve {
- my ($file) = @_;
+ _retrieve($_[0], 0);
+}
+
+#
+# lock_retrieve
+#
+# Same as retrieve, but with advisory locking.
+#
+sub lock_retrieve {
+ _retrieve($_[0], 1);
+}
+
+# Internal retrieve routine
+sub _retrieve {
+ my ($file, $use_locking) = @_;
local *FILE;
- open(FILE, "$file") || logcroak "can't open $file: $!";
+ open(FILE, $file) || logcroak "can't open $file: $!";
binmode FILE; # Archaic systems...
my $self;
my $da = $@; # Could be from exception handler
+ if ($use_locking) {
+ unless (&CAN_FLOCK) {
+ logcarp "Storable::lock_store: fcntl/flock emulation broken on $^O";
+ return undef;
+ }
+ flock(FILE, LOCK_SH) || logcroak "can't get shared lock on $file: $!";
+ # Unlocking will happen when FILE is closed
+ }
eval { $self = pretrieve(*FILE) }; # Call C routine
close(FILE);
logcroak $@ if $@ =~ s/\.?\n$/,/;
}
#
-# fdretrieve
+# fd_retrieve
#
# Same as retrieve, but perform from an already opened file descriptor instead.
#
-sub fdretrieve {
+sub fd_retrieve {
my ($file) = @_;
my $fd = fileno($file);
logcroak "not a valid file descriptor" unless defined $fd;
=head1 NAME
-Storable - persistency for perl data structures
+Storable - persistence for Perl data structures
=head1 SYNOPSIS
# Storing to and retrieving from an already opened file
store_fd \@array, \*STDOUT;
nstore_fd \%table, \*STDOUT;
- $aryref = retrieve_fd(\*SOCKET);
- $hashref = retrieve_fd(\*SOCKET);
+ $aryref = fd_retrieve(\*SOCKET);
+ $hashref = fd_retrieve(\*SOCKET);
# Serializing to memory
$serialized = freeze \%table;
# Deep (recursive) cloning
$cloneref = dclone($ref);
+ # Advisory locking
+ use Storable qw(lock_store lock_nstore lock_retrieve)
+ lock_store \%table, 'file';
+ lock_nstore \%table, 'file';
+ $hashref = lock_retrieve('file');
+
=head1 DESCRIPTION
-The Storable package brings persistency to your perl data structures
+The Storable package brings persistence to your Perl data structures
containing SCALAR, ARRAY, HASH or REF objects, i.e. anything that can be
-convenientely stored to disk and retrieved at a later time.
+conveniently stored to disk and retrieved at a later time.
It can be used in the regular procedural way by calling C<store> with
a reference to the object to be stored, along with the file name where
the image should be written.
+
The routine returns C<undef> for I/O problems or other internal error,
a true value otherwise. Serious errors are propagated as a C<die> exception.
-To retrieve data stored to disk, use C<retrieve> with a file name,
-and the objects stored into that file are recreated into memory for you,
-a I<reference> to the root object being returned. In case an I/O error
+To retrieve data stored to disk, use C<retrieve> with a file name.
+The objects stored into that file are recreated into memory for you,
+and a I<reference> to the root object is returned. In case an I/O error
occurs while reading, C<undef> is returned instead. Other serious
errors are propagated via C<die>.
At the cost of a slight header overhead, you may store to an already
opened file descriptor using the C<store_fd> routine, and retrieve
-from a file via C<retrieve_fd>. Those names aren't imported by default,
-so you will have to do that explicitely if you need those routines.
+from a file via C<fd_retrieve>. Those names aren't imported by default,
+so you will have to do that explicitly if you need those routines.
The file descriptor you supply must be already opened, for read
if you're going to retrieve and for write if you wish to store.
store_fd(\%table, *STDOUT) || die "can't store to stdout\n";
- $hashref = retrieve_fd(*STDIN);
+ $hashref = fd_retrieve(*STDIN);
You can also store data in network order to allow easy sharing across
multiple platforms, or when storing on a socket known to be remotely
connected. The routines to call have an initial C<n> prefix for I<network>,
as in C<nstore> and C<nstore_fd>. At retrieval time, your data will be
correctly restored so you don't have to know whether you're restoring
-from native or network ordered data.
+from native or network ordered data. Double values are stored stringified
+to ensure portability as well, at the slight risk of loosing some precision
+in the last decimals.
-When using C<retrieve_fd>, objects are retrieved in sequence, one
+When using C<fd_retrieve>, objects are retrieved in sequence, one
object (i.e. one recursive tree) per associated C<store_fd>.
If you're more from the object-oriented camp, you can inherit from
Storable provides you with a C<dclone> interface which does not create
that intermediary scalar but instead freezes the structure in some
-internal memory space and then immediatly thaws it out.
+internal memory space and then immediately thaws it out.
+
+=head1 ADVISORY LOCKING
+
+The C<lock_store> and C<lock_nstore> routine are equivalent to
+C<store> and C<nstore>, except that they get an exclusive lock on
+the file before writing. Likewise, C<lock_retrieve> does the same
+as C<retrieve>, but also gets a shared lock on the file before reading.
+
+As with any advisory locking scheme, the protection only works if you
+systematically use C<lock_store> and C<lock_retrieve>. If one side of
+your application uses C<store> whilst the other uses C<lock_retrieve>,
+you will get no protection at all.
+
+The internal advisory locking is implemented using Perl's flock()
+routine. If your system does not support any form of flock(), or if
+you share your files across NFS, you might wish to use other forms
+of locking by using modules such as LockFile::Simple which lock a
+file using a filesystem entry, instead of locking the file descriptor.
=head1 SPEED
The heart of Storable is written in C for decent speed. Extra low-level
-optimization have been made when manipulating perl internals, to
-sacrifice encapsulation for the benefit of a greater speed.
+optimizations have been made when manipulating perl internals, to
+sacrifice encapsulation for the benefit of greater speed.
=head1 CANONICAL REPRESENTATION
-Normally Storable stores elements of hashes in the order they are
+Normally, Storable stores elements of hashes in the order they are
stored internally by Perl, i.e. pseudo-randomly. If you set
C<$Storable::canonical> to some C<TRUE> value, Storable will store
hashes with the elements sorted by their key. This allows you to
even the compressed frozen representations), which can be useful for
creating lookup tables for complicated queries.
-Canonical order does not imply network order, those are two orthogonal
+Canonical order does not imply network order; those are two orthogonal
settings.
+=head1 FORWARD COMPATIBILITY
+
+This release of Storable can be used on a newer version of Perl to
+serialize data which is not supported by earlier Perls. By default,
+Storable will attempt to do the right thing, by C<croak()>ing if it
+encounters data that it cannot deserialize. However, the defaults
+can be changed as follows:
+
+=over 4
+
+=item utf8 data
+
+Perl 5.6 added support for Unicode characters with code points > 255,
+and Perl 5.8 has full support for Unicode characters in hash keys.
+Perl internally encodes strings with these characters using utf8, and
+Storable serializes them as utf8. By default, if an older version of
+Perl encounters a utf8 value it cannot represent, it will C<croak()>.
+To change this behaviour so that Storable deserializes utf8 encoded
+values as the string of bytes (effectively dropping the I<is_utf8> flag)
+set C<$Storable::drop_utf8> to some C<TRUE> value. This is a form of
+data loss, because with C<$drop_utf8> true, it becomes impossible to tell
+whether the original data was the Unicode string, or a series of bytes
+that happen to be valid utf8.
+
+=item restricted hashes
+
+Perl 5.8 adds support for restricted hashes, which have keys
+restricted to a given set, and can have values locked to be read only.
+By default, when Storable encounters a restricted hash on a perl
+that doesn't support them, it will deserialize it as a normal hash,
+silently discarding any placeholder keys and leaving the keys and
+all values unlocked. To make Storable C<croak()> instead, set
+C<$Storable::downgrade_restricted> to a C<FALSE> value. To restore
+the default set it back to some C<TRUE> value.
+
+=item files from future versions of Storable
+
+Earlier versions of Storable would immediately croak if they encountered
+a file with a higher internal version number than the reading Storable
+knew about. Internal version numbers are increased each time new data
+types (such as restricted hashes) are added to the vocabulary of the file
+format. This meant that a newer Storable module had no way of writing a
+file readable by an older Storable, even if the writer didn't store newer
+data types.
+
+This version of Storable will defer croaking until it encounters a data
+type in the file that it does not recognize. This means that it will
+continue to read files generated by newer Storable modules which are careful
+in what they write out, making it easier to upgrade Storable modules in a
+mixed environment.
+
+The old behaviour of immediate croaking can be re-instated by setting
+C<$Storable::accept_future_minor> to some C<FALSE> value.
+
+=back
+
+All these variables have no effect on a newer Perl which supports the
+relevant feature.
+
=head1 ERROR REPORTING
Storable uses the "exception" paradigm, in that it does not try to workaround
When Storable croaks, it tries to report the error via the C<logcroak()>
routine from the C<Log::Agent> package, if it is available.
+Normal errors are reported by having store() or retrieve() return C<undef>.
+Such errors are usually I/O errors (or truncated stream errors at retrieval).
+
=head1 WIZARDS ONLY
=head2 Hooks
Any class may define hooks that will be called during the serialization
and deserialization process on objects that are instances of that class.
Those hooks can redefine the way serialization is performed (and therefore,
-how the symetrical deserialization should be conducted).
+how the symmetrical deserialization should be conducted).
Since we said earlier:
Well, you could keep them in sync, but there's no guarantee it will always
hold on classes somebody else wrote. Besides, there is little to gain in
-doing so: a serializing hook could only keep one attribute of an object,
+doing so: a serializing hook could keep only one attribute of an object,
which is probably not what should happen during a deep cloning of that
same object.
Here is the hooking interface:
-=over
+=over 4
=item C<STORABLE_freeze> I<obj>, I<cloning>
=item C<STORABLE_thaw> I<obj>, I<cloning>, I<serialized>, ...
The deserializing hook called on the object during deserialization.
-But wait. If we're deserializing, there's no object yet... right?
+But wait: if we're deserializing, there's no object yet... right?
Wrong: the Storable engine creates an empty one for you. If you know Eiffel,
you can view C<STORABLE_thaw> as an alternate creation routine.
them at serialization time, pointing to the deserialized objects (which
have been processed courtesy of the Storable engine).
-It is up to you to use these information to populate I<obj> the way you want.
+When the Storable engine does not find any C<STORABLE_thaw> hook routine,
+it tries to load the class by requiring the package dynamically (using
+the blessed package name), and then re-attempts the lookup. If at that
+time the hook cannot be located, the engine croaks. Note that this mechanism
+will fail if you define several classes in the same file, but L<perlmod>
+warned you.
+
+It is up to you to use this information to populate I<obj> the way you want.
Returned value: none.
=head2 Predicates
-Predicates are not exportable. They must be called by explicitely prefixing
+Predicates are not exportable. They must be called by explicitly prefixing
them with the Storable package name.
-=over
+=over 4
=item C<Storable::last_op_in_netorder>
=item C<Storable::is_retrieving>
-Returns true if within a retrieve operation, (via STORABLE_thaw hook).
+Returns true if within a retrieve operation (via STORABLE_thaw hook).
=back
=head2 Recursion
-With hooks comes the ability to recurse back to the Storable engine. Indeed,
-hooks are regular Perl code, and Storable is convenient when it comes to
-serialize and deserialize things, so why not use it to handle the
-serialization string?
+With hooks comes the ability to recurse back to the Storable engine.
+Indeed, hooks are regular Perl code, and Storable is convenient when
+it comes to serializing and deserializing things, so why not use it
+to handle the serialization string?
-There are a few things you need to know however:
+There are a few things you need to know, however:
-=over
+=over 4
=item *
You can create endless loops if the things you serialize via freeze()
-(for instance) point back to the object we're trying to serialize in the hook.
+(for instance) point back to the object we're trying to serialize in
+the hook.
=item *
=head2 Deep Cloning
-There is a new Clone module available on CPAN which implements deep cloning
+There is a Clone module available on CPAN which implements deep cloning
natively, i.e. without freezing to memory and thawing the result. It is
aimed to replace Storable's dclone() some day. However, it does not currently
support Storable hooks to redefine the way deep cloning is performed.
+=head1 Storable magic
+
+Yes, there's a lot of that :-) But more precisely, in UNIX systems
+there's a utility called C<file>, which recognizes data files based on
+their contents (usually their first few bytes). For this to work,
+a certain file called F<magic> needs to taught about the I<signature>
+of the data. Where that configuration file lives depends on the UNIX
+flavour; often it's something like F</usr/share/misc/magic> or
+F</etc/magic>. Your system administrator needs to do the updating of
+the F<magic> file. The necessary signature information is output to
+STDOUT by invoking Storable::show_file_magic(). Note that the GNU
+implementation of the C<file> utility, version 3.38 or later,
+is expected to contain support for recognising Storable files
+out-of-the-box, in addition to other kinds of Perl files.
+
=head1 EXAMPLES
Here are some code samples showing a possible usage of Storable:
=head1 WARNING
If you're using references as keys within your hash tables, you're bound
-to disapointment when retrieving your data. Indeed, Perl stringifies
+to be disappointed when retrieving your data. Indeed, Perl stringifies
references used as hash table keys. If you later wish to access the
items via another reference stringification (i.e. using the same
reference that was used for the key originally to record the value into
the hash table), it will work because both references stringify to the
same string.
-It won't work across a C<store> and C<retrieve> operations however, because
-the addresses in the retrieved objects, which are part of the stringified
-references, will probably differ from the original addresses. The
-topology of your structure is preserved, but not hidden semantics
-like those.
+It won't work across a sequence of C<store> and C<retrieve> operations,
+however, because the addresses in the retrieved objects, which are
+part of the stringified references, will probably differ from the
+original addresses. The topology of your structure is preserved,
+but not hidden semantics like those.
On platforms where it matters, be sure to call C<binmode()> on the
descriptors that you pass to Storable functions.
Storing data canonically that contains large hashes can be
significantly slower than storing the same data normally, as
-temprorary arrays to hold the keys for each hash have to be allocated,
+temporary arrays to hold the keys for each hash have to be allocated,
populated, sorted and freed. Some tests have shown a halving of the
speed of storing -- the exact penalty will depend on the complexity of
your data. There is no slowdown on retrieval.
=head1 BUGS
-You can't store GLOB, CODE, FORMLINE, etc... If you can define
+You can't store GLOB, CODE, FORMLINE, etc.... If you can define
semantics for those operations, feel free to enhance Storable so that
it can deal with them.
Setting C<$Storable::canonical> may not yield frozen strings that
compare equal due to possible stringification of numbers. When the
-string version of a scalar exists, it is the form stored, therefore
+string version of a scalar exists, it is the form stored; therefore,
if you happen to use your numbers as strings between two freezing
operations on the same data structures, you will get different
results.
-Due to the aforementionned optimizations, Storable is at the mercy
-of perl's internal redesign or structure changes. If that bothers
-you, you can try convincing Larry that what is used in Storable
-should be documented and consistently kept in future revisions.
+When storing doubles in network order, their value is stored as text.
+However, you should also not expect non-numeric floating-point values
+such as infinity and "not a number" to pass successfully through a
+nstore()/retrieve() pair.
+
+As Storable neither knows nor cares about character sets (although it
+does know that characters may be more than eight bits wide), any difference
+in the interpretation of character codes between a host and a target
+system is your problem. In particular, if host and target use different
+code points to represent the characters used in the text representation
+of floating-point numbers, you will not be able be able to exchange
+floating-point data, even with nstore().
+
+C<Storable::drop_utf8> is a blunt tool. There is no facility either to
+return B<all> strings as utf8 sequences, or to attempt to convert utf8
+data back to 8 bit and C<croak()> if the conversion fails.
=head1 CREDITS
Jeff Gresham <gresham_jeffrey@jpmorgan.com>
Murray Nesbitt <murray@activestate.com>
Marc Lehmann <pcg@opengroup.org>
+ Justin Banks <justinb@wamnet.com>
+ Jarkko Hietaniemi <jhi@iki.fi> (AGAIN, as perl 5.7.0 Pumpkin!)
+ Salvador Ortiz Garcia <sog@msg.com.mx>
+ Dominic Dunlop <domo@computer.org>
+ Erik Haugan <erik@solbors.no>
for their bug reports, suggestions and contributions.
Benjamin Holzman contributed the tied variable support, Andrew Ford
contributed the canonical order for hashes, and Gisle Aas fixed
-a few misunderstandings of mine regarding the Perl internals,
+a few misunderstandings of mine regarding the perl internals,
and optimized the emission of "tags" in the output streams by
simply counting the objects instead of tagging them (leading to
a binary incompatibility for the Storable image starting at version
-0.6--older images are of course still properly understood).
+0.6--older images are, of course, still properly understood).
Murray Nesbitt made Storable thread-safe. Marc Lehmann added overloading
-and reference to tied items support.
-
-=head1 TRANSLATIONS
-
-There is a Japanese translation of this man page available at
-http://member.nifty.ne.jp/hippo2000/perltips/storable.htm ,
-courtesy of Kawai, Takanori <kawai@nippon-rad.co.jp>.
+and references to tied items support.
=head1 AUTHOR
-Raphael Manfredi F<E<lt>Raphael_Manfredi@pobox.comE<gt>>
+Storable was written by Raphael Manfredi F<E<lt>Raphael_Manfredi@pobox.comE<gt>>
+Maintenance is now done by the perl5-porters F<E<lt>perl5-porters@perl.orgE<gt>>
+
+Please e-mail us with problems, bug fixes, comments and complaints,
+although if you have complements you should send them to Raphael.
+Please don't e-mail Raphael with problems, as he no longer works on
+Storable, and your message will be delayed while he forwards it to us.
=head1 SEE ALSO
-Clone(3).
+L<Clone>.
=cut
projects / p5sagit/p5-mst-13.2.git / blobdiff