[ViewVC] Diff of: cvs/CBOR-XS/XS.pm

Comparing CBOR-XS/XS.pm (file contents):
Revision 1.10 by root, Mon Oct 28 22:03:20 2013 UTC vs.
Revision 1.23 by root, Fri Nov 22 16:00:30 2013 UTC

…		…
26	substr $many_cbor_strings, 0, $length, ""; # remove decoded cbor string	26	substr $many_cbor_strings, 0, $length, ""; # remove decoded cbor string
27	}	27	}
28		28
29	=head1 DESCRIPTION	29	=head1 DESCRIPTION
30		30
31	WARNING! This module is very new, and not very well tested (that's up to	31	WARNING! This module is very new, and not very well tested (that's up
32	you to do). Furthermore, details of the implementation might change freely	32	to you to do). Furthermore, details of the implementation might change
33	before version 1.0. And lastly, the object serialisation protocol depends	33	freely before version 1.0. And lastly, most extensions depend on an IANA
34	on a pending IANA assignment, and until that assignment is official, this	34	assignment, and until that assignment is official, this implementation is
35	implementation is not interoperable with other implementations (even	35	not interoperable with other implementations (even future versions of this
36	future versions of this module) until the assignment is done.	36	module) until the assignment is done.
37		37
38	You are still invited to try out CBOR, and this module.	38	You are still invited to try out CBOR, and this module.
39		39
40	This module converts Perl data structures to the Concise Binary Object	40	This module converts Perl data structures to the Concise Binary Object
41	Representation (CBOR) and vice versa. CBOR is a fast binary serialisation	41	Representation (CBOR) and vice versa. CBOR is a fast binary serialisation
…		…
46	In short, CBOR is a faster and very compact binary alternative to JSON,	46	In short, CBOR is a faster and very compact binary alternative to JSON,
47	with the added ability of supporting serialisation of Perl objects. (JSON	47	with the added ability of supporting serialisation of Perl objects. (JSON
48	often compresses better than CBOR though, so if you plan to compress the	48	often compresses better than CBOR though, so if you plan to compress the
49	data later you might want to compare both formats first).	49	data later you might want to compare both formats first).
50		50
		51	To give you a general idea about speed, with texts in the megabyte range,
		52	C<CBOR::XS> usually encodes roughly twice as fast as L<Storable> or
		53	L<JSON::XS> and decodes about 15%-30% faster than those. The shorter the
		54	data, the worse L<Storable> performs in comparison.
		55
		56	As for compactness, C<CBOR::XS> encoded data structures are usually about
		57	20% smaller than the same data encoded as (compact) JSON or L<Storable>.
		58
		59	In addition to the core CBOR data format, this module implements a number
		60	of extensions, to support cyclic and self-referencing data structures
		61	(see C<allow_sharing>), string deduplication (see C<allow_stringref>) and
		62	scalar references (always enabled).
		63
51	The primary goal of this module is to be I<correct> and the secondary goal	64	The primary goal of this module is to be I<correct> and the secondary goal
52	is to be I<fast>. To reach the latter goal it was written in C.	65	is to be I<fast>. To reach the latter goal it was written in C.
53		66
54	See MAPPING, below, on how CBOR::XS maps perl values to CBOR values and	67	See MAPPING, below, on how CBOR::XS maps perl values to CBOR values and
55	vice versa.	68	vice versa.
…		…
58		71
59	package CBOR::XS;	72	package CBOR::XS;
60		73
61	use common::sense;	74	use common::sense;
62		75
63	our $VERSION = 0.05;	76	our $VERSION = 0.08;
64	our @ISA = qw(Exporter);	77	our @ISA = qw(Exporter);
65		78
66	our @EXPORT = qw(encode_cbor decode_cbor);	79	our @EXPORT = qw(encode_cbor decode_cbor);
67		80
68	use Exporter;	81	use Exporter;
…		…
105	strings. All boolean flags described below are by default I<disabled>.	118	strings. All boolean flags described below are by default I<disabled>.
106		119
107	The mutators for flags all return the CBOR object again and thus calls can	120	The mutators for flags all return the CBOR object again and thus calls can
108	be chained:	121	be chained:
109		122
110	#TODO
111	my $cbor = CBOR::XS->new->encode ({a => [1,2]});	123	my $cbor = CBOR::XS->new->encode ({a => [1,2]});
112		124
113	=item $cbor = $cbor->max_depth ([$maximum_nesting_depth])	125	=item $cbor = $cbor->max_depth ([$maximum_nesting_depth])
114		126
115	=item $max_depth = $cbor->get_max_depth	127	=item $max_depth = $cbor->get_max_depth
…		…
149	If no argument is given, the limit check will be deactivated (same as when	161	If no argument is given, the limit check will be deactivated (same as when
150	C<0> is specified).	162	C<0> is specified).
151		163
152	See SECURITY CONSIDERATIONS, below, for more info on why this is useful.	164	See SECURITY CONSIDERATIONS, below, for more info on why this is useful.
153		165
		166	=item $cbor = $cbor->allow_unknown ([$enable])
		167
		168	=item $enabled = $cbor->get_allow_unknown
		169
		170	If C<$enable> is true (or missing), then C<encode> will I<not> throw an
		171	exception when it encounters values it cannot represent in CBOR (for
		172	example, filehandles) but instead will encode a CBOR C<error> value.
		173
		174	If C<$enable> is false (the default), then C<encode> will throw an
		175	exception when it encounters anything it cannot encode as CBOR.
		176
		177	This option does not affect C<decode> in any way, and it is recommended to
		178	leave it off unless you know your communications partner.
		179
		180	=item $cbor = $cbor->allow_sharing ([$enable])
		181
		182	=item $enabled = $cbor->get_allow_sharing
		183
		184	If C<$enable> is true (or missing), then C<encode> will not double-encode
		185	values that have been referenced before (e.g. when the same object, such
		186	as an array, is referenced multiple times), but instead will emit a
		187	reference to the earlier value.
		188
		189	This means that such values will only be encoded once, and will not result
		190	in a deep cloning of the value on decode, in decoders supporting the value
		191	sharing extension.
		192
		193	It is recommended to leave it off unless you know your
		194	communication partner supports the value sharing extensions to CBOR
		195	(http://cbor.schmorp.de/value-sharing).
		196
		197	Detecting shared values incurs a runtime overhead when values are encoded
		198	that have a reference counter large than one, and might unnecessarily
		199	increase the encoded size, as potentially shared values are encode as
		200	sharable whether or not they are actually shared.
		201
		202	At the moment, only targets of references can be shared (e.g. scalars,
		203	arrays or hashes pointed to by a reference). Weirder constructs, such as
		204	an array with multiple "copies" of the I<same> string, which are hard but
		205	not impossible to create in Perl, are not supported (this is the same as
		206	for L<Storable>).
		207
		208	If C<$enable> is false (the default), then C<encode> will encode
		209	exception when it encounters anything it cannot encode as CBOR.
		210
		211	This option does not affect C<decode> in any way - shared values and
		212	references will always be decoded properly if present.
		213
		214	=item $cbor = $cbor->allow_stringref ([$enable])
		215
		216	=item $enabled = $cbor->get_allow_stringref
		217
		218	If C<$enable> is true (or missing), then C<encode> will try not to encode
		219	the same string twice, but will instead encode a reference to the string
		220	instead. Depending on your data format. this can save a lot of space, but
		221	also results in a very large runtime overhead (expect encoding times to be
		222	2-4 times as high as without).
		223
		224	It is recommended to leave it off unless you know your
		225	communications partner supports the stringref extension to CBOR
		226	(http://cbor.schmorp.de/stringref).
		227
		228	If C<$enable> is false (the default), then C<encode> will encode
		229	exception when it encounters anything it cannot encode as CBOR.
		230
		231	This option does not affect C<decode> in any way - string references will
		232	always be decoded properly if present.
		233
		234	=item $cbor = $cbor->filter ([$cb->($tag, $value)])
		235
		236	=item $cb_or_undef = $cbor->get_filter
		237
		238	TODO
		239
154	=item $cbor_data = $cbor->encode ($perl_scalar)	240	=item $cbor_data = $cbor->encode ($perl_scalar)
155		241
156	Converts the given Perl data structure (a scalar value) to its CBOR	242	Converts the given Perl data structure (a scalar value) to its CBOR
157	representation.	243	representation.
158		244
…		…
226	C<Types:Serialiser::false> and C<Types::Serialiser::error>,	312	C<Types:Serialiser::false> and C<Types::Serialiser::error>,
227	respectively. They are overloaded to act almost exactly like the numbers	313	respectively. They are overloaded to act almost exactly like the numbers
228	C<1> and C<0> (for true and false) or to throw an exception on access (for	314	C<1> and C<0> (for true and false) or to throw an exception on access (for
229	error). See the L<Types::Serialiser> manpage for details.	315	error). See the L<Types::Serialiser> manpage for details.
230		316
231	=item CBOR tag 256 (perl object)	317	=item tagged values
232		318
233	The tag value C<256> (TODO: pending iana registration) will be used
234	to deserialise a Perl object serialised with C<FREEZE>. See "OBJECT
235	SERIALISATION", below, for details.
236
237	=item CBOR tag 55799 (magic header)
238
239	The tag 55799 is ignored (this tag implements the magic header).
240
241	=item other CBOR tags
242
243	Tagged items consists of a numeric tag and another CBOR value. Tags not	319	Tagged items consists of a numeric tag and another CBOR value.
244	handled internally are currently converted into a L<CBOR::XS::Tagged>
245	object, which is simply a blessed array reference consisting of the
246	numeric tag value followed by the (decoded) CBOR value.
247		320
248	In the future, support for user-supplied conversions might get added.	321	See L<TAG HANDLING AND EXTENSIONS> and the description of C<< ->filter >>
		322	for details.
249		323
250	=item anything else	324	=item anything else
251		325
252	Anything else (e.g. unsupported simple values) will raise a decoding	326	Anything else (e.g. unsupported simple values) will raise a decoding
253	error.	327	error.
…		…
283	C<1>, which get turned into false and true in CBOR.	357	C<1>, which get turned into false and true in CBOR.
284		358
285	=item CBOR::XS::Tagged objects	359	=item CBOR::XS::Tagged objects
286		360
287	Objects of this type must be arrays consisting of a single C<[tag, value]>	361	Objects of this type must be arrays consisting of a single C<[tag, value]>
288	pair. The (numerical) tag will be encoded as a CBOR tag, the value will be	362	pair. The (numerical) tag will be encoded as a CBOR tag, the value will
289	encoded as appropriate for the value.	363	be encoded as appropriate for the value. You cna use C<CBOR::XS::tag> to
		364	create such objects.
290		365
291	=item Types::Serialiser::true, Types::Serialiser::false, Types::Serialiser::error	366	=item Types::Serialiser::true, Types::Serialiser::false, Types::Serialiser::error
292		367
293	These special values become CBOR true, CBOR false and CBOR undefined	368	These special values become CBOR true, CBOR false and CBOR undefined
294	values, respectively. You can also use C<\1>, C<\0> and C<\undef> directly	369	values, respectively. You can also use C<\1>, C<\0> and C<\undef> directly
295	if you want.	370	if you want.
296		371
297	=item other blessed objects	372	=item other blessed objects
298		373
299	Other blessed objects are serialised via C<TO_CBOR> or C<FREEZE>. See	374	Other blessed objects are serialised via C<TO_CBOR> or C<FREEZE>. See
300	"OBJECT SERIALISATION", below, for details.	375	L<TAG HANDLING AND EXTENSIONS> for specific classes handled by this
		376	module, and L<OBJECT SERIALISATION> for generic object serialisation.
301		377
302	=item simple scalars	378	=item simple scalars
303		379
304	TODO
305	Simple Perl scalars (any scalar that is not a reference) are the most	380	Simple Perl scalars (any scalar that is not a reference) are the most
306	difficult objects to encode: CBOR::XS will encode undefined scalars as	381	difficult objects to encode: CBOR::XS will encode undefined scalars as
307	CBOR null values, scalars that have last been used in a string context	382	CBOR null values, scalars that have last been used in a string context
308	before encoding as CBOR strings, and anything else as number value:	383	before encoding as CBOR strings, and anything else as number value:
309		384
…		…
446	=head1 MAGIC HEADER	521	=head1 MAGIC HEADER
447		522
448	There is no way to distinguish CBOR from other formats	523	There is no way to distinguish CBOR from other formats
449	programmatically. To make it easier to distinguish CBOR from other	524	programmatically. To make it easier to distinguish CBOR from other
450	formats, the CBOR specification has a special "magic string" that can be	525	formats, the CBOR specification has a special "magic string" that can be
451	prepended to any CBOR string without changing it's meaning.	526	prepended to any CBOR string without changing its meaning.
452		527
453	This string is available as C<$CBOR::XS::MAGIC>. This module does not	528	This string is available as C<$CBOR::XS::MAGIC>. This module does not
454	prepend this string tot he CBOR data it generates, but it will ignroe it	529	prepend this string to the CBOR data it generates, but it will ignore it
455	if present, so users can prepend this string as a "file type" indicator as	530	if present, so users can prepend this string as a "file type" indicator as
456	required.	531	required.
		532
		533
		534	=head1 THE CBOR::XS::Tagged CLASS
		535
		536	CBOR has the concept of tagged values - any CBOR value can be tagged with
		537	a numeric 64 bit number, which are centrally administered.
		538
		539	C<CBOR::XS> handles a few tags internally when en- or decoding. You can
		540	also create tags yourself by encoding C<CBOR::XS::Tagged> objects, and the
		541	decoder will create C<CBOR::XS::Tagged> objects itself when it hits an
		542	unknown tag.
		543
		544	These objects are simply blessed array references - the first member of
		545	the array being the numerical tag, the second being the value.
		546
		547	You can interact with C<CBOR::XS::Tagged> objects in the following ways:
		548
		549	=over 4
		550
		551	=item $tagged = CBOR::XS::tag $tag, $value
		552
		553	This function(!) creates a new C<CBOR::XS::Tagged> object using the given
		554	C<$tag> (0..2**64-1) to tag the given C<$value> (which can be any Perl
		555	value that can be encoded in CBOR, including serialisable Perl objects and
		556	C<CBOR::XS::Tagged> objects).
		557
		558	=item $tagged->[0]
		559
		560	=item $tagged->[0] = $new_tag
		561
		562	=item $tag = $tagged->tag
		563
		564	=item $new_tag = $tagged->tag ($new_tag)
		565
		566	Access/mutate the tag.
		567
		568	=item $tagged->[1]
		569
		570	=item $tagged->[1] = $new_value
		571
		572	=item $value = $tagged->value
		573
		574	=item $new_value = $tagged->value ($new_value)
		575
		576	Access/mutate the tagged value.
		577
		578	=back
		579
		580	=cut
		581
		582	sub tag($$) {
		583	bless [@_], CBOR::XS::Tagged::;
		584	}
		585
		586	sub CBOR::XS::Tagged::tag {
		587	$_[0][0] = $_[1] if $#_;
		588	$_[0][0]
		589	}
		590
		591	sub CBOR::XS::Tagged::value {
		592	$_[0][1] = $_[1] if $#_;
		593	$_[0][1]
		594	}
		595
		596	=head2 EXAMPLES
		597
		598	Here are some examples of C<CBOR::XS::Tagged> uses to tag objects.
		599
		600	You can look up CBOR tag value and emanings in the IANA registry at
		601	L<http://www.iana.org/assignments/cbor-tags/cbor-tags.xhtml>.
		602
		603	Prepend a magic header (C<$CBOR::XS::MAGIC>):
		604
		605	my $cbor = encode_cbor CBOR::XS::tag 55799, $value;
		606	# same as:
		607	my $cbor = $CBOR::XS::MAGIC . encode_cbor $value;
		608
		609	Serialise some URIs and a regex in an array:
		610
		611	my $cbor = encode_cbor [
		612	(CBOR::XS::tag 32, "http://www.nethype.de/"),
		613	(CBOR::XS::tag 32, "http://software.schmorp.de/"),
		614	(CBOR::XS::tag 35, "^[Pp][Ee][Rr][lL]\$"),
		615	];
		616
		617	Wrap CBOR data in CBOR:
		618
		619	my $cbor_cbor = encode_cbor
		620	CBOR::XS::tag 24,
		621	encode_cbor [1, 2, 3];
		622
		623	=head1 TAG HANDLING AND EXTENSIONS
		624
		625	This section describes how this module handles specific tagged values
		626	and extensions. If a tag is not mentioned here and no additional filters
		627	are provided for it, then the default handling applies (creating a
		628	CBOR::XS::Tagged object on decoding, and only encoding the tag when
		629	explicitly requested).
		630
		631	Tags not handled specifically are currently converted into a
		632	L<CBOR::XS::Tagged> object, which is simply a blessed array reference
		633	consisting of the numeric tag value followed by the (decoded) CBOR value.
		634
		635	Future versions of this module reserve the right to special case
		636	additional tags (such as base64url).
		637
		638	=head2 ENFORCED TAGS
		639
		640	These tags are always handled when decoding, and their handling cannot be
		641	overriden by the user.
		642
		643	=over 4
		644
		645	=item <unassigned> (perl-object, L<http://cbor.schmorp.de/perl-object>)
		646
		647	These tags are automatically created (and decoded) for serialisable
		648	objects using the C<FREEZE/THAW> methods (the L<Types::Serialier> object
		649	serialisation protocol). See L<OBJECT SERIALISATION> for details.
		650
		651	=item <unassigned>, <unassigned> (sharable, sharedref, L <http://cbor.schmorp.de/value-sharing>)
		652
		653	These tags are automatically decoded when encountered, resulting in
		654	shared values in the decoded object. They are only encoded, however, when
		655	C<allow_sharable> is enabled.
		656
		657	=item <unassigned>, <unassigned> (stringref-namespace, stringref, L <http://cbor.schmorp.de/stringref>)
		658
		659	These tags are automatically decoded when encountered. They are only
		660	encoded, however, when C<allow_stringref> is enabled.
		661
		662	=item 22098 (indirection, L<http://cbor.schmorp.de/indirection>)
		663
		664	This tag is automatically generated when a reference are encountered (with
		665	the exception of hash and array refernces). It is converted to a reference
		666	when decoding.
		667
		668	=item 55799 (self-describe CBOR, RFC 7049)
		669
		670	This value is not generated on encoding (unless explicitly requested by
		671	the user), and is simply ignored when decoding.
		672
		673	=back
		674
		675	=head2 OPTIONAL TAGS
		676
		677	These tags have default filters provided when decoding. Their handling can
		678	be overriden by changing the C<%CBOR::XS::FILTER> entry for the tag, or by
		679	providing a custom C<filter> function when decoding.
		680
		681	When they result in decoding into a specific Perl class, the module
		682	usually provides a corresponding C<TO_CBOR> method as well.
		683
		684	When any of these need to load additional modules that are not part of the
		685	perl core distribution (e.g. L<URI>), it is (currently) up to the user to
		686	provide these modules. The decoding usually fails with an exception if the
		687	required module cannot be loaded.
		688
		689	=over 4
		690
		691	=item 2, 3 (positive/negative bignum)
		692
		693	These tags are decoded into L<Math::BigInt> objects. The corresponding
		694	C<Math::BigInt::TO_CBOR> method encodes "small" bigints into normal CBOR
		695	integers, and others into positive/negative CBOR bignums.
		696
		697	=item 4, 5 (decimal fraction/bigfloat)
		698
		699	Both decimal fractions and bigfloats are decoded into L<Math::BigFloat>
		700	objects. The corresponding C<Math::BigFloat::TO_CBOR> method I<always>
		701	encodes into a decimal fraction.
		702
		703	CBOR cannot represent bigfloats with I<very> large exponents - conversion
		704	of such big float objects is undefined.
		705
		706	Also, NaN and infinities are not encoded properly.
		707
		708	=item 21, 22, 23 (expected later JSON conversion)
		709
		710	CBOR::XS is not a CBOR-to-JSON converter, and will simply ignore these
		711	tags.
		712
		713	=item 32 (URI)
		714
		715	These objects decode into L<URI> objects. The corresponding
		716	C<URI::TO_CBOR> method again results in a CBOR URI value.
		717
		718	=back
		719
		720	=cut
		721
		722	our %FILTER = (
		723	# 0 # rfc4287 datetime, utf-8
		724	# 1 # unix timestamp, any
		725
		726	2 => sub { # pos bigint
		727	require Math::BigInt;
		728	Math::BigInt->new ("0x" . unpack "H*", pop)
		729	},
		730
		731	3 => sub { # neg bigint
		732	require Math::BigInt;
		733	-Math::BigInt->new ("0x" . unpack "H*", pop)
		734	},
		735
		736	4 => sub { # decimal fraction, array
		737	require Math::BigFloat;
		738	Math::BigFloat->new ($_[1][1] . "E" . $_[1][0])
		739	},
		740
		741	5 => sub { # bigfloat, array
		742	require Math::BigFloat;
		743	scalar Math::BigFloat->new ($_[1][1])->blsft ($_[1][0], 2)
		744	},
		745
		746	21 => sub { pop }, # expected conversion to base64url encoding
		747	22 => sub { pop }, # expected conversion to base64 encoding
		748	23 => sub { pop }, # expected conversion to base16 encoding
		749
		750	# 24 # embedded cbor, byte string
		751
		752	32 => sub {
		753	require URI;
		754	URI->new (pop)
		755	},
		756
		757	# 33 # base64url rfc4648, utf-8
		758	# 34 # base64 rfc46484, utf-8
		759	# 35 # regex pcre/ecma262, utf-8
		760	# 36 # mime message rfc2045, utf-8
		761	);
457		762
458		763
459	=head1 CBOR and JSON	764	=head1 CBOR and JSON
460		765
461	CBOR is supposed to implement a superset of the JSON data model, and is,	766	CBOR is supposed to implement a superset of the JSON data model, and is,
…		…
544	Please refrain from using rt.cpan.org or any other bug reporting	849	Please refrain from using rt.cpan.org or any other bug reporting
545	service. I put the contact address into my modules for a reason.	850	service. I put the contact address into my modules for a reason.
546		851
547	=cut	852	=cut
548		853
		854	our %FILTER = (
		855	# 0 # rfc4287 datetime, utf-8
		856	# 1 # unix timestamp, any
		857
		858	2 => sub { # pos bigint
		859	require Math::BigInt;
		860	Math::BigInt->new ("0x" . unpack "H*", pop)
		861	},
		862
		863	3 => sub { # neg bigint
		864	require Math::BigInt;
		865	-Math::BigInt->new ("0x" . unpack "H*", pop)
		866	},
		867
		868	4 => sub { # decimal fraction, array
		869	require Math::BigFloat;
		870	Math::BigFloat->new ($_[1][1] . "E" . $_[1][0])
		871	},
		872
		873	5 => sub { # bigfloat, array
		874	require Math::BigFloat;
		875	scalar Math::BigFloat->new ($_[1][1])->blsft ($_[1][0], 2)
		876	},
		877
		878	21 => sub { pop }, # expected conversion to base64url encoding
		879	22 => sub { pop }, # expected conversion to base64 encoding
		880	23 => sub { pop }, # expected conversion to base16 encoding
		881
		882	# 24 # embedded cbor, byte string
		883
		884	32 => sub {
		885	require URI;
		886	URI->new (pop)
		887	},
		888
		889	# 33 # base64url rfc4648, utf-8
		890	# 34 # base64 rfc46484, utf-8
		891	# 35 # regex pcre/ecma262, utf-8
		892	# 36 # mime message rfc2045, utf-8
		893	);
		894
		895	sub CBOR::XS::default_filter {
		896	&{ $FILTER{$_[0]} or return }
		897	}
		898
		899	sub URI::TO_CBOR {
		900	my $uri = $_[0]->as_string;
		901	utf8::upgrade $uri;
		902	CBOR::XS::tag 32, $uri
		903	}
		904
		905	sub Math::BigInt::TO_CBOR {
		906	if ($_[0] >= -2147483648 && $_[0] <= 2147483647) {
		907	$_[0]->numify
		908	} else {
		909	my $hex = substr $_[0]->as_hex, 2;
		910	$hex = "0$hex" if 1 & length $hex; # sigh
		911	CBOR::XS::tag $_[0] >= 0 ? 2 : 3, pack "H*", $hex
		912	}
		913	}
		914
		915	sub Math::BigFloat::TO_CBOR {
		916	my ($m, $e) = $_[0]->parts;
		917	CBOR::XS::tag 4, [$e->numify, $m]
		918	}
		919
549	XSLoader::load "CBOR::XS", $VERSION;	920	XSLoader::load "CBOR::XS", $VERSION;
550		921
551	=head1 SEE ALSO	922	=head1 SEE ALSO
552		923
553	The L<JSON> and L<JSON::XS> modules that do similar, but human-readable,	924	The L<JSON> and L<JSON::XS> modules that do similar, but human-readable,

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Comparing CBOR-XS/XS.pm (file contents): Revision 1.10 by root, Mon Oct 28 22:03:20 2013 UTC vs. Revision 1.23 by root, Fri Nov 22 16:00:30 2013 UTC

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Comparing CBOR-XS/XS.pm (file contents):
Revision 1.10 by root, Mon Oct 28 22:03:20 2013 UTC vs.
Revision 1.23 by root, Fri Nov 22 16:00:30 2013 UTC