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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.6 by root, Sat Oct 26 22:25:47 2013 UTC vs.
Revision 1.50 by root, Thu Feb 25 02:29:22 2016 UTC

…		…
7	#include <stdlib.h>	7	#include <stdlib.h>
8	#include <stdio.h>	8	#include <stdio.h>
9	#include <limits.h>	9	#include <limits.h>
10	#include <float.h>	10	#include <float.h>
11		11
		12	#define ECB_NO_THREADS 1
12	#include "ecb.h"	13	#include "ecb.h"
13		14
		15	// compatibility with perl <5.18
		16	#ifndef HvNAMELEN_get
		17	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		18	#endif
		19	#ifndef HvNAMELEN
		20	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		21	#endif
		22	#ifndef HvNAMEUTF8
		23	# define HvNAMEUTF8(hv) 0
		24	#endif
		25	#ifndef SvREFCNT_dec_NN
		26	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		27	#endif
		28
		29	// known major and minor types
		30	enum cbor_type
		31	{
		32	MAJOR_SHIFT = 5,
		33	MINOR_MASK = 0x1f,
		34
		35	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		36	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		37	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		38	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		39	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		40	MAJOR_MAP = 5 << MAJOR_SHIFT,
		41	MAJOR_TAG = 6 << MAJOR_SHIFT,
		42	MAJOR_MISC = 7 << MAJOR_SHIFT,
		43
		44	// INT/STRING/ARRAY/MAP subtypes
		45	LENGTH_EXT1 = 24,
		46	LENGTH_EXT2 = 25,
		47	LENGTH_EXT4 = 26,
		48	LENGTH_EXT8 = 27,
		49
		50	// SIMPLE types (effectively MISC subtypes)
		51	SIMPLE_FALSE = 20,
		52	SIMPLE_TRUE = 21,
		53	SIMPLE_NULL = 22,
		54	SIMPLE_UNDEF = 23,
		55
		56	// MISC subtype (unused)
		57	MISC_EXT1 = 24,
		58	MISC_FLOAT16 = 25,
		59	MISC_FLOAT32 = 26,
		60	MISC_FLOAT64 = 27,
		61
		62	// BYTES/TEXT/ARRAY/MAP
		63	MINOR_INDEF = 31,
		64	};
		65
		66	// known tags
		67	enum cbor_tag
		68	{
		69	// extensions
		70	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
		71	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
		72	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
		73	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
		74	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
		75	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
		76	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
		77
		78	// rfc7049
		79	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
		80	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
		81	CBOR_TAG_POS_BIGNUM = 2, // byte string
		82	CBOR_TAG_NEG_BIGNUM = 3, // byte string
		83	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
		84	CBOR_TAG_BIGFLOAT = 5, // array
		85
		86	CBOR_TAG_CONV_B64U = 21, // base64url, any
		87	CBOR_TAG_CONV_B64 = 22, // base64, any
		88	CBOR_TAG_CONV_HEX = 23, // base16, any
		89	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
		90
		91	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
		92	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
		93	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
		94	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
		95	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
		96
		97	CBOR_TAG_MAGIC = 55799, // self-describe cbor
		98	};
		99
14	#define F_SHRINK 0x00000200UL	100	#define F_SHRINK 0x00000001UL
15	#define F_ALLOW_UNKNOWN 0x00002000UL	101	#define F_ALLOW_UNKNOWN 0x00000002UL
		102	#define F_ALLOW_SHARING 0x00000004UL
		103	#define F_ALLOW_CYCLES 0x00000008UL
		104	#define F_PACK_STRINGS 0x00000010UL
		105	#define F_VALIDATE_UTF8 0x00000020UL
16		106
17	#define INIT_SIZE 32 // initial scalar size to be allocated	107	#define INIT_SIZE 32 // initial scalar size to be allocated
18		108
19	#define SB do {	109	#define SB do {
20	#define SE } while (0)	110	#define SE } while (0)
…		…
31	#else	121	#else
32	# define CBOR_SLOW 0	122	# define CBOR_SLOW 0
33	# define CBOR_STASH cbor_stash	123	# define CBOR_STASH cbor_stash
34	#endif	124	#endif
35		125
36	static HV *cbor_stash, *cbor_boolean_stash, *cbor_tagged_stash; // CBOR::XS::	126	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
37	static SV *cbor_true, *cbor_false;	127	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
38		128
39	typedef struct {	129	typedef struct {
40	U32 flags;	130	U32 flags;
41	U32 max_depth;	131	U32 max_depth;
42	STRLEN max_size;	132	STRLEN max_size;
		133	SV *filter;
		134
		135	// for the incremental parser
		136	STRLEN incr_pos; // the current offset into the text
		137	STRLEN incr_need; // minimum bytes needed to decode
		138	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
43	} CBOR;	139	} CBOR;
44		140
45	ecb_inline void	141	ecb_inline void
46	cbor_init (CBOR *cbor)	142	cbor_init (CBOR *cbor)
47	{	143	{
48	Zero (cbor, 1, CBOR);	144	Zero (cbor, 1, CBOR);
49	cbor->max_depth = 512;	145	cbor->max_depth = 512;
		146	}
		147
		148	ecb_inline void
		149	cbor_free (CBOR *cbor)
		150	{
		151	SvREFCNT_dec (cbor->filter);
		152	SvREFCNT_dec (cbor->incr_count);
50	}	153	}
51		154
52	/////////////////////////////////////////////////////////////////////////////	155	/////////////////////////////////////////////////////////////////////////////
53	// utility functions	156	// utility functions
54		157
…		…
76	SvPV_renew (sv, SvCUR (sv) + 1);	179	SvPV_renew (sv, SvCUR (sv) + 1);
77	#endif	180	#endif
78	}	181	}
79	}	182	}
80		183
81	/////////////////////////////////////////////////////////////////////////////	184	// minimum length of a string to be registered for stringref
82	// fp hell	185	ecb_inline int
83		186	minimum_string_length (UV idx)
84	//TODO	187	{
		188	return idx > 23
		189	? idx > 0xffU
		190	? idx > 0xffffU
		191	? idx > 0xffffffffU
		192	? 11
		193	: 7
		194	: 5
		195	: 4
		196	: 3;
		197	}
85		198
86	/////////////////////////////////////////////////////////////////////////////	199	/////////////////////////////////////////////////////////////////////////////
87	// encoder	200	// encoder
88		201
89	// structure used for encoding CBOR	202	// structure used for encoding CBOR
…		…
92	char *cur; // SvPVX (sv) + current output position	205	char *cur; // SvPVX (sv) + current output position
93	char *end; // SvEND (sv)	206	char *end; // SvEND (sv)
94	SV *sv; // result scalar	207	SV *sv; // result scalar
95	CBOR cbor;	208	CBOR cbor;
96	U32 depth; // recursion level	209	U32 depth; // recursion level
		210	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		211	UV stringref_idx;
		212	HV *shareable; // ptr => index, or 0
		213	UV shareable_idx;
97	} enc_t;	214	} enc_t;
98		215
99	ecb_inline void	216	ecb_inline void
100	need (enc_t *enc, STRLEN len)	217	need (enc_t *enc, STRLEN len)
101	{	218	{
…		…
118	static void	235	static void
119	encode_uint (enc_t *enc, int major, UV len)	236	encode_uint (enc_t *enc, int major, UV len)
120	{	237	{
121	need (enc, 9);	238	need (enc, 9);
122		239
123	if (len < 24)	240	if (ecb_expect_true (len < LENGTH_EXT1))
124	*enc->cur++ = major | len;	241	*enc->cur++ = major | len;
125	else if (len <= 0xff)	242	else if (ecb_expect_true (len <= 0xffU))
126	{	243	{
127	*enc->cur++ = major | 24;	244	*enc->cur++ = major | LENGTH_EXT1;
128	*enc->cur++ = len;	245	*enc->cur++ = len;
129	}	246	}
130	else if (len <= 0xffff)	247	else if (len <= 0xffffU)
131	{	248	{
132	*enc->cur++ = major | 25;	249	*enc->cur++ = major | LENGTH_EXT2;
133	*enc->cur++ = len >> 8;	250	*enc->cur++ = len >> 8;
134	*enc->cur++ = len;	251	*enc->cur++ = len;
135	}	252	}
136	else if (len <= 0xffffffff)	253	else if (len <= 0xffffffffU)
137	{	254	{
138	*enc->cur++ = major | 26;	255	*enc->cur++ = major | LENGTH_EXT4;
139	*enc->cur++ = len >> 24;	256	*enc->cur++ = len >> 24;
140	*enc->cur++ = len >> 16;	257	*enc->cur++ = len >> 16;
141	*enc->cur++ = len >> 8;	258	*enc->cur++ = len >> 8;
142	*enc->cur++ = len;	259	*enc->cur++ = len;
143	}	260	}
144	else	261	else
145	{	262	{
146	*enc->cur++ = major | 27;	263	*enc->cur++ = major | LENGTH_EXT8;
147	*enc->cur++ = len >> 56;	264	*enc->cur++ = len >> 56;
148	*enc->cur++ = len >> 48;	265	*enc->cur++ = len >> 48;
149	*enc->cur++ = len >> 40;	266	*enc->cur++ = len >> 40;
150	*enc->cur++ = len >> 32;	267	*enc->cur++ = len >> 32;
151	*enc->cur++ = len >> 24;	268	*enc->cur++ = len >> 24;
…		…
153	*enc->cur++ = len >> 8;	270	*enc->cur++ = len >> 8;
154	*enc->cur++ = len;	271	*enc->cur++ = len;
155	}	272	}
156	}	273	}
157		274
158	static void	275	ecb_inline void
		276	encode_tag (enc_t *enc, UV tag)
		277	{
		278	encode_uint (enc, MAJOR_TAG, tag);
		279	}
		280
		281	ecb_inline void
159	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	282	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)
160	{	283	{
161	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	284	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
162	need (enc, len);	285	need (enc, len);
163	memcpy (enc->cur, str, len);	286	memcpy (enc->cur, str, len);
164	enc->cur += len;	287	enc->cur += len;
165	}	288	}
166		289
		290	static void
		291	encode_strref (enc_t *enc, int utf8, char *str, STRLEN len)
		292	{
		293	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		294	{
		295	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		296
		297	if (SvOK (*svp))
		298	{
		299	// already registered, use stringref
		300	encode_tag (enc, CBOR_TAG_STRINGREF);
		301	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		302	return;
		303	}
		304	else if (len >= minimum_string_length (enc->stringref_idx))
		305	{
		306	// register only
		307	sv_setuv (*svp, enc->stringref_idx);
		308	++enc->stringref_idx;
		309	}
		310	}
		311
		312	encode_str (enc, utf8, str, len);
		313	}
		314
167	static void encode_sv (enc_t *enc, SV *sv);	315	static void encode_sv (enc_t *enc, SV *sv);
168		316
169	static void	317	static void
170	encode_av (enc_t *enc, AV *av)	318	encode_av (enc_t *enc, AV *av)
171	{	319	{
…		…
174	if (enc->depth >= enc->cbor.max_depth)	322	if (enc->depth >= enc->cbor.max_depth)
175	croak (ERR_NESTING_EXCEEDED);	323	croak (ERR_NESTING_EXCEEDED);
176		324
177	++enc->depth;	325	++enc->depth;
178		326
179	encode_uint (enc, 0x80, len + 1);	327	encode_uint (enc, MAJOR_ARRAY, len + 1);
180		328
		329	if (SvMAGICAL (av))
181	for (i = 0; i <= len; ++i)	330	for (i = 0; i <= len; ++i)
182	{	331	{
183	SV **svp = av_fetch (av, i, 0);	332	SV **svp = av_fetch (av, i, 0);
184	encode_sv (enc, svp ? *svp : &PL_sv_undef);	333	encode_sv (enc, svp ? *svp : &PL_sv_undef);
185	}	334	}
		335	else
		336	for (i = 0; i <= len; ++i)
		337	{
		338	SV *sv = AvARRAY (av)[i];
		339	encode_sv (enc, sv ? sv : &PL_sv_undef);
		340	}
186		341
187	--enc->depth;	342	--enc->depth;
188	}	343	}
189		344
190	static void	345	static void
…		…
199		354
200	int pairs = hv_iterinit (hv);	355	int pairs = hv_iterinit (hv);
201	int mg = SvMAGICAL (hv);	356	int mg = SvMAGICAL (hv);
202		357
203	if (mg)	358	if (mg)
204	encode_ch (enc, 0xa0 | 31);	359	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
205	else	360	else
206	encode_uint (enc, 0xa0, pairs);	361	encode_uint (enc, MAJOR_MAP, pairs);
207		362
208	while ((he = hv_iternext (hv)))	363	while ((he = hv_iternext (hv)))
209	{	364	{
210	if (HeKLEN (he) == HEf_SVKEY)	365	if (HeKLEN (he) == HEf_SVKEY)
211	encode_sv (enc, HeSVKEY (he));	366	encode_sv (enc, HeSVKEY (he));
212	else	367	else
213	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	368	encode_strref (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));
214		369
215	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	370	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
216	}	371	}
217		372
218	if (mg)	373	if (mg)
219	encode_ch (enc, 0xe0 | 31);	374	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
220		375
221	--enc->depth;	376	--enc->depth;
222	}	377	}
223		378
224	// encode objects, arrays and special \0=false and \1=true values.	379	// encode objects, arrays and special \0=false and \1=true values.
225	static void	380	static void
226	encode_rv (enc_t *enc, SV *sv)	381	encode_rv (enc_t *enc, SV *sv)
227	{	382	{
228	svtype svt;
229
230	SvGETMAGIC (sv);	383	SvGETMAGIC (sv);
		384
231	svt = SvTYPE (sv);	385	svtype svt = SvTYPE (sv);
232		386
233	if (ecb_expect_false (SvOBJECT (sv)))	387	if (ecb_expect_false (SvOBJECT (sv)))
234	{	388	{
235	HV *boolean_stash = !CBOR_SLOW || cbor_boolean_stash	389	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
236	? cbor_boolean_stash	390	? types_boolean_stash
237	: gv_stashpv ("CBOR::XS::Boolean", 1);	391	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		392	HV *error_stash = !CBOR_SLOW || types_error_stash
		393	? types_error_stash
		394	: gv_stashpv ("Types::Serialiser::Error", 1);
238	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	395	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
239	? cbor_tagged_stash	396	? cbor_tagged_stash
240	: gv_stashpv ("CBOR::XS::Tagged" , 1);	397	: gv_stashpv ("CBOR::XS::Tagged" , 1);
241		398
		399	HV *stash = SvSTASH (sv);
		400
242	if (SvSTASH (sv) == boolean_stash)	401	if (stash == boolean_stash)
243	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	402	{
		403	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		404	return;
		405	}
		406	else if (stash == error_stash)
		407	{
		408	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		409	return;
		410	}
244	else if (SvSTASH (sv) == tagged_stash)	411	else if (stash == tagged_stash)
245	{	412	{
246	if (svt != SVt_PVAV)	413	if (svt != SVt_PVAV)
247	croak ("encountered CBOR::XS::Tagged object that isn't an array");	414	croak ("encountered CBOR::XS::Tagged object that isn't an array");
248		415
249	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	416	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
250	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));	417	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		418
		419	return;
		420	}
		421	}
		422
		423	if (ecb_expect_false (SvREFCNT (sv) > 1)
		424	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		425	{
		426	if (!enc->shareable)
		427	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		428
		429	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		430
		431	if (SvOK (*svp))
		432	{
		433	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		434	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		435	return;
251	}	436	}
252	else	437	else
253	{	438	{
		439	sv_setuv (*svp, enc->shareable_idx);
		440	++enc->shareable_idx;
		441	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		442	}
		443	}
		444
		445	if (ecb_expect_false (SvOBJECT (sv)))
		446	{
		447	HV *stash = SvSTASH (sv);
		448	GV *method;
		449
		450	if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
		451	{
		452	dSP;
		453
		454	ENTER; SAVETMPS;
		455	PUSHMARK (SP);
254	// we re-bless the reference to get overload and other niceties right	456	// we re-bless the reference to get overload and other niceties right
255	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
256
257	if (to_cbor)
258	{
259	dSP;
260
261	ENTER; SAVETMPS; PUSHMARK (SP);
262	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	457	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
263		458
264	// calling with G_SCALAR ensures that we always get a 1 return value
265	PUTBACK;	459	PUTBACK;
		460	// G_SCALAR ensures that return value is 1
266	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	461	call_sv ((SV *)GvCV (method), G_SCALAR);
267	SPAGAIN;	462	SPAGAIN;
268		463
269	// catch this surprisingly common error	464	// catch this surprisingly common error
270	if (SvROK (TOPs) && SvRV (TOPs) == sv)	465	if (SvROK (TOPs) && SvRV (TOPs) == sv)
271	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	466	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
272		467
273	sv = POPs;	468	encode_sv (enc, POPs);
		469
274	PUTBACK;	470	PUTBACK;
275		471
276	encode_sv (enc, sv);
277
278	FREETMPS; LEAVE;	472	FREETMPS; LEAVE;
279	}	473	}
		474	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
		475	{
		476	dSP;
		477
		478	ENTER; SAVETMPS;
		479	SAVESTACK_POS ();
		480	PUSHMARK (SP);
		481	EXTEND (SP, 2);
		482	// we re-bless the reference to get overload and other niceties right
		483	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		484	PUSHs (sv_cbor);
		485
		486	PUTBACK;
		487	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		488	SPAGAIN;
		489
		490	// catch this surprisingly common error
		491	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		492	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		493
		494	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		495	encode_uint (enc, MAJOR_ARRAY, count + 1);
		496	encode_strref (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		497
		498	while (count)
		499	encode_sv (enc, SP[1 - count--]);
		500
		501	PUTBACK;
		502
		503	FREETMPS; LEAVE;
		504	}
280	else	505	else
281	croak ("encountered object '%s', but no TO_CBOR method available on it",	506	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
282	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	507	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
283	}
284	}	508	}
285	else if (svt == SVt_PVHV)	509	else if (svt == SVt_PVHV)
286	encode_hv (enc, (HV *)sv);	510	encode_hv (enc, (HV *)sv);
287	else if (svt == SVt_PVAV)	511	else if (svt == SVt_PVAV)
288	encode_av (enc, (AV *)sv);	512	encode_av (enc, (AV *)sv);
289	else if (svt < SVt_PVAV)
290	{
291	STRLEN len = 0;
292	char *pv = svt ? SvPV (sv, len) : 0;
293
294	if (len == 1 && *pv == '1')
295	encode_ch (enc, 0xe0 | 21);
296	else if (len == 1 && *pv == '0')
297	encode_ch (enc, 0xe0 | 20);
298	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
299	encode_ch (enc, 0xe0 | 23);
300	else
301	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
302	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
303	}
304	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
305	encode_ch (enc, 0xe0 | 23);
306	else	513	else
307	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	514	{
308	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	515	encode_tag (enc, CBOR_TAG_INDIRECTION);
		516	encode_sv (enc, sv);
		517	}
309	}	518	}
310		519
311	static void	520	static void
312	encode_nv (enc_t *enc, SV *sv)	521	encode_nv (enc_t *enc, SV *sv)
313	{	522	{
314	double nv = SvNVX (sv);	523	double nv = SvNVX (sv);
315		524
316	need (enc, 9);	525	need (enc, 9);
317		526
318	if (ecb_expect_false (nv == (U32)nv))	527	if (ecb_expect_false (nv == (NV)(U32)nv))
319	encode_uint (enc, 0x00, (U32)nv);	528	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
320	//TODO: maybe I32?	529	//TODO: maybe I32?
321	else if (ecb_expect_false (nv == (float)nv))	530	else if (ecb_expect_false (nv == (float)nv))
322	{	531	{
323	uint32_t fp = ecb_float_to_binary32 (nv);	532	uint32_t fp = ecb_float_to_binary32 (nv);
324		533
325	*enc->cur++ = 0xe0 | 26;	534	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
326		535
327	if (!ecb_big_endian ())	536	if (!ecb_big_endian ())
328	fp = ecb_bswap32 (fp);	537	fp = ecb_bswap32 (fp);
329		538
330	memcpy (enc->cur, &fp, 4);	539	memcpy (enc->cur, &fp, 4);
…		…
332	}	541	}
333	else	542	else
334	{	543	{
335	uint64_t fp = ecb_double_to_binary64 (nv);	544	uint64_t fp = ecb_double_to_binary64 (nv);
336		545
337	*enc->cur++ = 0xe0 | 27;	546	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
338		547
339	if (!ecb_big_endian ())	548	if (!ecb_big_endian ())
340	fp = ecb_bswap64 (fp);	549	fp = ecb_bswap64 (fp);
341		550
342	memcpy (enc->cur, &fp, 8);	551	memcpy (enc->cur, &fp, 8);
…		…
351		560
352	if (SvPOKp (sv))	561	if (SvPOKp (sv))
353	{	562	{
354	STRLEN len;	563	STRLEN len;
355	char *str = SvPV (sv, len);	564	char *str = SvPV (sv, len);
356	encode_str (enc, SvUTF8 (sv), str, len);	565	encode_strref (enc, SvUTF8 (sv), str, len);
357	}	566	}
358	else if (SvNOKp (sv))	567	else if (SvNOKp (sv))
359	encode_nv (enc, sv);	568	encode_nv (enc, sv);
360	else if (SvIOKp (sv))	569	else if (SvIOKp (sv))
361	{	570	{
362	if (SvIsUV (sv))	571	if (SvIsUV (sv))
363	encode_uint (enc, 0x00, SvUVX (sv));	572	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
364	else if (SvIVX (sv) >= 0)	573	else if (SvIVX (sv) >= 0)
365	encode_uint (enc, 0x00, SvIVX (sv));	574	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
366	else	575	else
367	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	576	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
368	}	577	}
369	else if (SvROK (sv))	578	else if (SvROK (sv))
370	encode_rv (enc, SvRV (sv));	579	encode_rv (enc, SvRV (sv));
371	else if (!SvOK (sv))	580	else if (!SvOK (sv))
372	encode_ch (enc, 0xe0 | 22);	581	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
373	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	582	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
374	encode_ch (enc, 0xe0 | 23);	583	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
375	else	584	else
376	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	585	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
377	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	586	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
378	}	587	}
379		588
380	static SV *	589	static SV *
381	encode_cbor (SV *scalar, CBOR *cbor)	590	encode_cbor (SV *scalar, CBOR *cbor)
382	{	591	{
383	enc_t enc;	592	enc_t enc = { 0 };
384		593
385	enc.cbor = *cbor;	594	enc.cbor = *cbor;
386	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	595	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
387	enc.cur = SvPVX (enc.sv);	596	enc.cur = SvPVX (enc.sv);
388	enc.end = SvEND (enc.sv);	597	enc.end = SvEND (enc.sv);
389	enc.depth = 0;
390		598
391	SvPOK_only (enc.sv);	599	SvPOK_only (enc.sv);
		600
		601	if (cbor->flags & F_PACK_STRINGS)
		602	{
		603	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		604	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		605	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		606	}
		607
392	encode_sv (&enc, scalar);	608	encode_sv (&enc, scalar);
393		609
394	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	610	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
395	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	611	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
396		612
…		…
410	U8 *end; // end of input string	626	U8 *end; // end of input string
411	const char *err; // parse error, if != 0	627	const char *err; // parse error, if != 0
412	CBOR cbor;	628	CBOR cbor;
413	U32 depth; // recursion depth	629	U32 depth; // recursion depth
414	U32 maxdepth; // recursion depth limit	630	U32 maxdepth; // recursion depth limit
		631	AV *shareable;
		632	AV *stringref;
		633	SV *decode_tagged;
415	} dec_t;	634	} dec_t;
416		635
417	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	636	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE
418		637
419	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	638	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")
…		…
422	#define DEC_DEC_DEPTH --dec->depth	641	#define DEC_DEC_DEPTH --dec->depth
423		642
424	static UV	643	static UV
425	decode_uint (dec_t *dec)	644	decode_uint (dec_t *dec)
426	{	645	{
427	switch (*dec->cur & 31)	646	U8 m = *dec->cur & MINOR_MASK;
428	{	647	++dec->cur;
429	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
430	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
431	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
432	return *dec->cur++ & 31;
433		648
434	case 24:	649	if (ecb_expect_true (m < LENGTH_EXT1))
		650	return m;
		651	else if (ecb_expect_true (m == LENGTH_EXT1))
		652	{
435	WANT (2);	653	WANT (1);
436	dec->cur += 2;	654	dec->cur += 1;
437	return dec->cur[-1];	655	return dec->cur[-1];
438		656	}
439	case 25:	657	else if (ecb_expect_true (m == LENGTH_EXT2))
		658	{
440	WANT (3);	659	WANT (2);
441	dec->cur += 3;	660	dec->cur += 2;
442	return (((UV)dec->cur[-2]) << 8)	661	return (((UV)dec->cur[-2]) << 8)
443	| ((UV)dec->cur[-1]);	662	| ((UV)dec->cur[-1]);
444		663	}
445	case 26:	664	else if (ecb_expect_true (m == LENGTH_EXT4))
		665	{
446	WANT (5);	666	WANT (4);
447	dec->cur += 5;	667	dec->cur += 4;
448	return (((UV)dec->cur[-4]) << 24)	668	return (((UV)dec->cur[-4]) << 24)
449	| (((UV)dec->cur[-3]) << 16)	669	| (((UV)dec->cur[-3]) << 16)
450	| (((UV)dec->cur[-2]) << 8)	670	| (((UV)dec->cur[-2]) << 8)
451	| ((UV)dec->cur[-1]);	671	| ((UV)dec->cur[-1]);
452		672	}
453	case 27:	673	else if (ecb_expect_true (m == LENGTH_EXT8))
		674	{
454	WANT (9);	675	WANT (8);
455	dec->cur += 9;	676	dec->cur += 8;
		677
		678	return
		679	#if UVSIZE < 8
		680	0
		681	#else
456	return (((UV)dec->cur[-8]) << 56)	682	(((UV)dec->cur[-8]) << 56)
457	| (((UV)dec->cur[-7]) << 48)	683	| (((UV)dec->cur[-7]) << 48)
458	| (((UV)dec->cur[-6]) << 40)	684	| (((UV)dec->cur[-6]) << 40)
459	| (((UV)dec->cur[-5]) << 32)	685	| (((UV)dec->cur[-5]) << 32)
		686	#endif
460	| (((UV)dec->cur[-4]) << 24)	687	| (((UV)dec->cur[-4]) << 24)
461	| (((UV)dec->cur[-3]) << 16)	688	| (((UV)dec->cur[-3]) << 16)
462	| (((UV)dec->cur[-2]) << 8)	689	| (((UV)dec->cur[-2]) << 8)
463	| ((UV)dec->cur[-1]);	690	| ((UV)dec->cur[-1]);
464		691	}
465	default:	692	else
466	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	693	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
467	}
468		694
469	fail:	695	fail:
470	return 0;	696	return 0;
471	}	697	}
472		698
…		…
477	{	703	{
478	AV *av = newAV ();	704	AV *av = newAV ();
479		705
480	DEC_INC_DEPTH;	706	DEC_INC_DEPTH;
481		707
482	if ((*dec->cur & 31) == 31)	708	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
483	{	709	{
484	++dec->cur;	710	++dec->cur;
485		711
486	for (;;)	712	for (;;)
487	{	713	{
488	WANT (1);	714	WANT (1);
489		715
490	if (*dec->cur == (0xe0 | 31))	716	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
491	{	717	{
492	++dec->cur;	718	++dec->cur;
493	break;	719	break;
494	}	720	}
495		721
…		…
498	}	724	}
499	else	725	else
500	{	726	{
501	int i, len = decode_uint (dec);	727	int i, len = decode_uint (dec);
502		728
		729	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
503	av_fill (av, len - 1);	730	av_fill (av, len - 1);
504		731
505	for (i = 0; i < len; ++i)	732	for (i = 0; i < len; ++i)
506	AvARRAY (av)[i] = decode_sv (dec);	733	AvARRAY (av)[i] = decode_sv (dec);
507	}	734	}
…		…
513	SvREFCNT_dec (av);	740	SvREFCNT_dec (av);
514	DEC_DEC_DEPTH;	741	DEC_DEC_DEPTH;
515	return &PL_sv_undef;	742	return &PL_sv_undef;
516	}	743	}
517		744
		745	static void
		746	decode_he (dec_t *dec, HV *hv)
		747	{
		748	// for speed reasons, we specialcase single-string
		749	// byte or utf-8 strings as keys, but only when !stringref
		750
		751	if (ecb_expect_true (!dec->stringref))
		752	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		753	{
		754	I32 len = decode_uint (dec);
		755	char *key = (char *)dec->cur;
		756
		757	WANT (len);
		758	dec->cur += len;
		759
		760	hv_store (hv, key, len, decode_sv (dec), 0);
		761
		762	return;
		763	}
		764	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		765	{
		766	I32 len = decode_uint (dec);
		767	char *key = (char *)dec->cur;
		768
		769	WANT (len);
		770	dec->cur += len;
		771
		772	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		773	if (!is_utf8_string (key, len))
		774	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		775
		776	hv_store (hv, key, -len, decode_sv (dec), 0);
		777
		778	return;
		779	}
		780
		781	SV *k = decode_sv (dec);
		782	SV *v = decode_sv (dec);
		783
		784	hv_store_ent (hv, k, v, 0);
		785	SvREFCNT_dec (k);
		786
		787	fail:
		788	;
		789	}
		790
518	static SV *	791	static SV *
519	decode_hv (dec_t *dec)	792	decode_hv (dec_t *dec)
520	{	793	{
521	HV *hv = newHV ();	794	HV *hv = newHV ();
522		795
523	DEC_INC_DEPTH;	796	DEC_INC_DEPTH;
524		797
525	if ((*dec->cur & 31) == 31)	798	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
526	{	799	{
527	++dec->cur;	800	++dec->cur;
528		801
529	for (;;)	802	for (;;)
530	{	803	{
531	WANT (1);	804	WANT (1);
532		805
533	if (*dec->cur == (0xe0 | 31))	806	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
534	{	807	{
535	++dec->cur;	808	++dec->cur;
536	break;	809	break;
537	}	810	}
538		811
539	SV *k = decode_sv (dec);	812	decode_he (dec, hv);
540	SV *v = decode_sv (dec);
541
542	hv_store_ent (hv, k, v, 0);
543	}	813	}
544	}	814	}
545	else	815	else
546	{	816	{
547	int len = decode_uint (dec);	817	int pairs = decode_uint (dec);
548		818
549	while (len--)	819	while (pairs--)
550	{	820	decode_he (dec, hv);
551	SV *k = decode_sv (dec);
552	SV *v = decode_sv (dec);
553
554	hv_store_ent (hv, k, v, 0);
555	}
556	}	821	}
557		822
558	DEC_DEC_DEPTH;	823	DEC_DEC_DEPTH;
559	return newRV_noinc ((SV *)hv);	824	return newRV_noinc ((SV *)hv);
560		825
…		…
567	static SV *	832	static SV *
568	decode_str (dec_t *dec, int utf8)	833	decode_str (dec_t *dec, int utf8)
569	{	834	{
570	SV *sv = 0;	835	SV *sv = 0;
571		836
572	if ((*dec->cur & 31) == 31)	837	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
573	{	838	{
		839	// indefinite length strings
574	++dec->cur;	840	++dec->cur;
575		841
		842	U8 major = *dec->cur & MAJOR_MISC;
		843
576	sv = newSVpvn ("", 0);	844	sv = newSVpvn ("", 0);
577		845
578	// not very fast, and certainly not robust against illegal input
579	for (;;)	846	for (;;)
580	{	847	{
581	WANT (1);	848	WANT (1);
582		849
583	if (*dec->cur == (0xe0 | 31))	850	if ((*dec->cur - major) > LENGTH_EXT8)
		851	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
584	{	852	{
585	++dec->cur;	853	++dec->cur;
586	break;	854	break;
587	}	855	}
		856	else
		857	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
588		858
589	sv_catsv (sv, decode_sv (dec));	859	STRLEN len = decode_uint (dec);
		860
		861	WANT (len);
		862	sv_catpvn (sv, dec->cur, len);
		863	dec->cur += len;
590	}	864	}
591	}	865	}
592	else	866	else
593	{	867	{
594	STRLEN len = decode_uint (dec);	868	STRLEN len = decode_uint (dec);
595		869
596	WANT (len);	870	WANT (len);
597	sv = newSVpvn (dec->cur, len);	871	sv = newSVpvn (dec->cur, len);
598	dec->cur += len;	872	dec->cur += len;
		873
		874	if (ecb_expect_false (dec->stringref)
		875	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		876	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
599	}	877	}
600		878
601	if (utf8)	879	if (utf8)
		880	{
		881	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		882	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		883	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		884
602	SvUTF8_on (sv);	885	SvUTF8_on (sv);
		886	}
603		887
604	return sv;	888	return sv;
605		889
606	fail:	890	fail:
607	SvREFCNT_dec (sv);	891	SvREFCNT_dec (sv);
…		…
609	}	893	}
610		894
611	static SV *	895	static SV *
612	decode_tagged (dec_t *dec)	896	decode_tagged (dec_t *dec)
613	{	897	{
		898	SV *sv = 0;
614	UV tag = decode_uint (dec);	899	UV tag = decode_uint (dec);
		900
		901	WANT (1);
		902
		903	switch (tag)
		904	{
		905	case CBOR_TAG_MAGIC:
615	SV *sv = decode_sv (dec);	906	sv = decode_sv (dec);
		907	break;
616		908
617	if (tag == 55799) // 2.4.5 Self-Describe CBOR	909	case CBOR_TAG_INDIRECTION:
		910	sv = newRV_noinc (decode_sv (dec));
		911	break;
		912
		913	case CBOR_TAG_STRINGREF_NAMESPACE:
		914	{
		915	ENTER; SAVETMPS;
		916
		917	SAVESPTR (dec->stringref);
		918	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		919
		920	sv = decode_sv (dec);
		921
		922	FREETMPS; LEAVE;
		923	}
		924	break;
		925
		926	case CBOR_TAG_STRINGREF:
		927	{
		928	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		929	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		930
		931	UV idx = decode_uint (dec);
		932
		933	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		934	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		935
		936	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		937	}
		938	break;
		939
		940	case CBOR_TAG_VALUE_SHAREABLE:
		941	{
		942	if (ecb_expect_false (!dec->shareable))
		943	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		944
		945	if (dec->cbor.flags & F_ALLOW_CYCLES)
		946	{
		947	sv = newSV (0);
		948	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		949
		950	SV *osv = decode_sv (dec);
		951	sv_setsv (sv, osv);
		952	SvREFCNT_dec_NN (osv);
		953	}
		954	else
		955	{
		956	av_push (dec->shareable, &PL_sv_undef);
		957	int idx = AvFILLp (dec->shareable);
		958	sv = decode_sv (dec);
		959	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		960	}
		961	}
		962	break;
		963
		964	case CBOR_TAG_VALUE_SHAREDREF:
		965	{
		966	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		967	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		968
		969	UV idx = decode_uint (dec);
		970
		971	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		972	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		973
		974	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		975
		976	if (sv == &PL_sv_undef)
		977	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		978	}
		979	break;
		980
		981	case CBOR_TAG_PERL_OBJECT:
		982	{
		983	sv = decode_sv (dec);
		984
		985	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		986	ERR ("corrupted CBOR data (non-array perl object)");
		987
		988	AV *av = (AV *)SvRV (sv);
		989	int len = av_len (av) + 1;
		990	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		991
		992	if (!stash)
		993	ERR ("cannot decode perl-object (package does not exist)");
		994
		995	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		996
		997	if (!method)
		998	ERR ("cannot decode perl-object (package does not have a THAW method)");
		999
		1000	dSP;
		1001
		1002	ENTER; SAVETMPS;
		1003	PUSHMARK (SP);
		1004	EXTEND (SP, len + 1);
		1005	// we re-bless the reference to get overload and other niceties right
		1006	PUSHs (*av_fetch (av, 0, 1));
		1007	PUSHs (sv_cbor);
		1008
		1009	int i;
		1010
		1011	for (i = 1; i < len; ++i)
		1012	PUSHs (*av_fetch (av, i, 1));
		1013
		1014	PUTBACK;
		1015	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1016	SPAGAIN;
		1017
		1018	if (SvTRUE (ERRSV))
		1019	{
		1020	FREETMPS; LEAVE;
		1021	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1022	}
		1023
		1024	SvREFCNT_dec (sv);
		1025	sv = SvREFCNT_inc (POPs);
		1026
		1027	PUTBACK;
		1028
		1029	FREETMPS; LEAVE;
		1030	}
		1031	break;
		1032
		1033	default:
		1034	{
		1035	sv = decode_sv (dec);
		1036
		1037	dSP;
		1038	ENTER; SAVETMPS;
		1039	SAVESTACK_POS ();
		1040	PUSHMARK (SP);
		1041	EXTEND (SP, 2);
		1042	PUSHs (newSVuv (tag));
		1043	PUSHs (sv);
		1044
		1045	PUTBACK;
		1046	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1047	SPAGAIN;
		1048
		1049	if (SvTRUE (ERRSV))
		1050	{
		1051	FREETMPS; LEAVE;
		1052	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1053	}
		1054
		1055	if (count)
		1056	{
		1057	SvREFCNT_dec (sv);
		1058	sv = SvREFCNT_inc (POPs);
		1059	}
		1060	else
		1061	{
		1062	AV *av = newAV ();
		1063	av_push (av, newSVuv (tag));
		1064	av_push (av, sv);
		1065
		1066	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1067	? cbor_tagged_stash
		1068	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1069	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1070	}
		1071
		1072	PUTBACK;
		1073
		1074	FREETMPS; LEAVE;
		1075	}
		1076	break;
		1077	}
		1078
618	return sv;	1079	return sv;
619		1080
620	AV *av = newAV ();	1081	fail:
621	av_push (av, newSVuv (tag));	1082	SvREFCNT_dec (sv);
622	av_push (av, sv);	1083	return &PL_sv_undef;
623	return newRV_noinc ((SV *)av);
624	}	1084	}
625		1085
626	static SV *	1086	static SV *
627	decode_sv (dec_t *dec)	1087	decode_sv (dec_t *dec)
628	{	1088	{
629	WANT (1);	1089	WANT (1);
630		1090
631	switch (*dec->cur >> 5)	1091	switch (*dec->cur >> MAJOR_SHIFT)
632	{	1092	{
633	case 0: // unsigned int	1093	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
634	return newSVuv (decode_uint (dec));	1094	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
635	case 1: // negative int	1095	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
636	return newSViv (-1 - (IV)decode_uint (dec));	1096	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
637	case 2: // octet string	1097	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
638	return decode_str (dec, 0);	1098	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
639	case 3: // utf-8 string	1099	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
640	return decode_str (dec, 1);	1100
641	case 4: // array	1101	case MAJOR_MISC >> MAJOR_SHIFT:
642	return decode_av (dec);
643	case 5: // map
644	return decode_hv (dec);
645	case 6: // tag
646	return decode_tagged (dec);
647	case 7: // misc
648	switch (*dec->cur++ & 31)	1102	switch (*dec->cur++ & MINOR_MASK)
649	{	1103	{
650	case 20:	1104	case SIMPLE_FALSE:
651	#if CBOR_SLOW	1105	#if CBOR_SLOW
652	cbor_false = get_bool ("CBOR::XS::false");	1106	types_false = get_bool ("Types::Serialiser::false");
653	#endif	1107	#endif
654	return newSVsv (cbor_false);	1108	return newSVsv (types_false);
655	case 21:	1109	case SIMPLE_TRUE:
656	#if CBOR_SLOW	1110	#if CBOR_SLOW
657	cbor_true = get_bool ("CBOR::XS::true");	1111	types_true = get_bool ("Types::Serialiser::true");
658	#endif	1112	#endif
659	return newSVsv (cbor_true);	1113	return newSVsv (types_true);
660	case 22:	1114	case SIMPLE_NULL:
661	return newSVsv (&PL_sv_undef);	1115	return newSVsv (&PL_sv_undef);
		1116	case SIMPLE_UNDEF:
		1117	#if CBOR_SLOW
		1118	types_error = get_bool ("Types::Serialiser::error");
		1119	#endif
		1120	return newSVsv (types_error);
662		1121
663	case 25:	1122	case MISC_FLOAT16:
664	{	1123	{
665	WANT (2);	1124	WANT (2);
666		1125
667	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1126	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
668	dec->cur += 2;	1127	dec->cur += 2;
669		1128
670	return newSVnv (ecb_binary16_to_float (fp));	1129	return newSVnv (ecb_binary16_to_float (fp));
671	}	1130	}
672		1131
673	case 26:	1132	case MISC_FLOAT32:
674	{	1133	{
675	uint32_t fp;	1134	uint32_t fp;
676	WANT (4);	1135	WANT (4);
677	memcpy (&fp, dec->cur, 4);	1136	memcpy (&fp, dec->cur, 4);
678	dec->cur += 4;	1137	dec->cur += 4;
…		…
681	fp = ecb_bswap32 (fp);	1140	fp = ecb_bswap32 (fp);
682		1141
683	return newSVnv (ecb_binary32_to_float (fp));	1142	return newSVnv (ecb_binary32_to_float (fp));
684	}	1143	}
685		1144
686	case 27:	1145	case MISC_FLOAT64:
687	{	1146	{
688	uint64_t fp;	1147	uint64_t fp;
689	WANT (8);	1148	WANT (8);
690	memcpy (&fp, dec->cur, 8);	1149	memcpy (&fp, dec->cur, 8);
691	dec->cur += 8;	1150	dec->cur += 8;
…		…
694	fp = ecb_bswap64 (fp);	1153	fp = ecb_bswap64 (fp);
695		1154
696	return newSVnv (ecb_binary64_to_double (fp));	1155	return newSVnv (ecb_binary64_to_double (fp));
697	}	1156	}
698		1157
699	// 0..19 unassigned	1158	// 0..19 unassigned simple
700	// 24 reserved + unassigned (reserved values are not encodable)	1159	// 24 reserved + unassigned simple (reserved values are not encodable)
		1160	// 28-30 unassigned misc
		1161	// 31 break code
701	default:	1162	default:
702	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1163	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
703	}	1164	}
704		1165
705	break;	1166	break;
706	}	1167	}
707		1168
…		…
710	}	1171	}
711		1172
712	static SV *	1173	static SV *
713	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1174	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
714	{	1175	{
715	dec_t dec;	1176	dec_t dec = { 0 };
716	SV *sv;	1177	SV *sv;
		1178	STRLEN len;
		1179	char *data = SvPVbyte (string, len);
717		1180
718	/* work around bugs in 5.10 where manipulating magic values
719	* makes perl ignore the magic in subsequent accesses.
720	* also make a copy of non-PV values, to get them into a clean
721	* state (SvPV should do that, but it's buggy, see below).
722	*/
723	/*SvGETMAGIC (string);*/
724	if (SvMAGICAL (string) || !SvPOK (string))
725	string = sv_2mortal (newSVsv (string));
726
727	SvUPGRADE (string, SVt_PV);
728
729	/* work around a bug in perl 5.10, which causes SvCUR to fail an
730	* assertion with -DDEBUGGING, although SvCUR is documented to
731	* return the xpv_cur field which certainly exists after upgrading.
732	* according to nicholas clark, calling SvPOK fixes this.
733	* But it doesn't fix it, so try another workaround, call SvPV_nolen
734	* and hope for the best.
735	* Damnit, SvPV_nolen still trips over yet another assertion. This
736	* assertion business is seriously broken, try yet another workaround
737	* for the broken -DDEBUGGING.
738	*/
739	{
740	#ifdef DEBUGGING
741	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
742	#else
743	STRLEN offset = SvCUR (string);
744	#endif
745
746	if (offset > cbor->max_size && cbor->max_size)	1181	if (len > cbor->max_size && cbor->max_size)
747	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1182	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
748	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1183	(unsigned long)len, (unsigned long)cbor->max_size);
749	}
750
751	sv_utf8_downgrade (string, 0);
752		1184
753	dec.cbor = *cbor;	1185	dec.cbor = *cbor;
754	dec.cur = (U8 *)SvPVX (string);	1186	dec.cur = (U8 *)data;
755	dec.end = (U8 *)SvEND (string);	1187	dec.end = (U8 *)data + len;
756	dec.err = 0;
757	dec.depth = 0;
758		1188
759	sv = decode_sv (&dec);	1189	sv = decode_sv (&dec);
760		1190
761	if (offset_return)	1191	if (offset_return)
762	*offset_return = dec.cur;	1192	*offset_return = dec.cur;
…		…
765	if (dec.cur != dec.end && !dec.err)	1195	if (dec.cur != dec.end && !dec.err)
766	dec.err = "garbage after CBOR object";	1196	dec.err = "garbage after CBOR object";
767		1197
768	if (dec.err)	1198	if (dec.err)
769	{	1199	{
		1200	if (dec.shareable)
		1201	{
		1202	// need to break cyclic links, which whould all be in shareable
		1203	int i;
		1204	SV **svp;
		1205
		1206	for (i = av_len (dec.shareable) + 1; i--; )
		1207	if ((svp = av_fetch (dec.shareable, i, 0)))
		1208	sv_setsv (*svp, &PL_sv_undef);
		1209	}
		1210
770	SvREFCNT_dec (sv);	1211	SvREFCNT_dec (sv);
771	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1212	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
772	}	1213	}
773		1214
774	sv = sv_2mortal (sv);	1215	sv = sv_2mortal (sv);
775		1216
776	return sv;	1217	return sv;
777	}	1218	}
778		1219
		1220	/////////////////////////////////////////////////////////////////////////////
		1221	// incremental parser
		1222
		1223	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1224
		1225	// returns 0 for notyet, 1 for success or error
		1226	static int
		1227	incr_parse (CBOR *self, SV *cborstr)
		1228	{
		1229	STRLEN cur;
		1230	SvPV (cborstr, cur);
		1231
		1232	while (ecb_expect_true (self->incr_need <= cur))
		1233	{
		1234	// table of integer count bytes
		1235	static I8 incr_len[MINOR_MASK + 1] = {
		1236	0, 0, 0, 0, 0, 0, 0, 0,
		1237	0, 0, 0, 0, 0, 0, 0, 0,
		1238	0, 0, 0, 0, 0, 0, 0, 0,
		1239	1, 2, 4, 8,-1,-1,-1,-2
		1240	};
		1241
		1242	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1243	U8 m = *p & MINOR_MASK;
		1244	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1245	I8 ilen = incr_len[m];
		1246
		1247	self->incr_need = self->incr_pos + 1;
		1248
		1249	if (ecb_expect_false (ilen < 0))
		1250	{
		1251	if (m != MINOR_INDEF)
		1252	return 1; // error
		1253
		1254	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1255	{
		1256	if (count >= 0)
		1257	return 1; // error
		1258
		1259	count = 1;
		1260	}
		1261	else
		1262	{
		1263	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1264	count = -1;
		1265	}
		1266	}
		1267	else
		1268	{
		1269	self->incr_need += ilen;
		1270	if (ecb_expect_false (self->incr_need > cur))
		1271	return 0;
		1272
		1273	int major = *p >> MAJOR_SHIFT;
		1274
		1275	switch (major)
		1276	{
		1277	case MAJOR_TAG >> MAJOR_SHIFT:
		1278	++count; // tags merely prefix another value
		1279	break;
		1280
		1281	case MAJOR_BYTES >> MAJOR_SHIFT:
		1282	case MAJOR_TEXT >> MAJOR_SHIFT:
		1283	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1284	case MAJOR_MAP >> MAJOR_SHIFT:
		1285	{
		1286	UV len;
		1287
		1288	if (ecb_expect_false (ilen))
		1289	{
		1290	len = 0;
		1291
		1292	do {
		1293	len = (len << 8) | *++p;
		1294	} while (--ilen);
		1295	}
		1296	else
		1297	len = m;
		1298
		1299	switch (major)
		1300	{
		1301	case MAJOR_BYTES >> MAJOR_SHIFT:
		1302	case MAJOR_TEXT >> MAJOR_SHIFT:
		1303	self->incr_need += len;
		1304	if (ecb_expect_false (self->incr_need > cur))
		1305	return 0;
		1306
		1307	break;
		1308
		1309	case MAJOR_MAP >> MAJOR_SHIFT:
		1310	len <<= 1;
		1311	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1312	if (len)
		1313	{
		1314	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1315	count = len + 1;
		1316	}
		1317	break;
		1318	}
		1319	}
		1320	}
		1321	}
		1322
		1323	self->incr_pos = self->incr_need;
		1324
		1325	if (count > 0)
		1326	{
		1327	while (!--count)
		1328	{
		1329	if (!AvFILLp (self->incr_count))
		1330	return 1; // done
		1331
		1332	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1333	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1334	}
		1335
		1336	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1337	}
		1338	}
		1339
		1340	return 0;
		1341	}
		1342
		1343
779	/////////////////////////////////////////////////////////////////////////////	1344	/////////////////////////////////////////////////////////////////////////////
780	// XS interface functions	1345	// XS interface functions
781		1346
782	MODULE = CBOR::XS PACKAGE = CBOR::XS	1347	MODULE = CBOR::XS PACKAGE = CBOR::XS
783		1348
784	BOOT:	1349	BOOT:
785	{	1350	{
786	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1351	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
787	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);
788	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);	1352	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
789		1353
790	cbor_true = get_bool ("CBOR::XS::true");	1354	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
791	cbor_false = get_bool ("CBOR::XS::false");	1355	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1356
		1357	types_true = get_bool ("Types::Serialiser::true" );
		1358	types_false = get_bool ("Types::Serialiser::false");
		1359	types_error = get_bool ("Types::Serialiser::error");
		1360
		1361	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1362
		1363	sv_cbor = newSVpv ("CBOR", 0);
		1364	SvREADONLY_on (sv_cbor);
792	}	1365	}
793		1366
794	PROTOTYPES: DISABLE	1367	PROTOTYPES: DISABLE
795		1368
796	void CLONE (...)	1369	void CLONE (...)
797	CODE:	1370	CODE:
798	cbor_stash = 0;	1371	cbor_stash = 0;
799	cbor_boolean_stash = 0;
800	cbor_tagged_stash = 0;	1372	cbor_tagged_stash = 0;
		1373	types_error_stash = 0;
		1374	types_boolean_stash = 0;
801		1375
802	void new (char *klass)	1376	void new (char *klass)
803	PPCODE:	1377	PPCODE:
804	{	1378	{
805	SV *pv = NEWSV (0, sizeof (CBOR));	1379	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
813		1387
814	void shrink (CBOR *self, int enable = 1)	1388	void shrink (CBOR *self, int enable = 1)
815	ALIAS:	1389	ALIAS:
816	shrink = F_SHRINK	1390	shrink = F_SHRINK
817	allow_unknown = F_ALLOW_UNKNOWN	1391	allow_unknown = F_ALLOW_UNKNOWN
		1392	allow_sharing = F_ALLOW_SHARING
		1393	allow_cycles = F_ALLOW_CYCLES
		1394	pack_strings = F_PACK_STRINGS
		1395	validate_utf8 = F_VALIDATE_UTF8
818	PPCODE:	1396	PPCODE:
819	{	1397	{
820	if (enable)	1398	if (enable)
821	self->flags |= ix;	1399	self->flags |= ix;
822	else	1400	else
…		…
827		1405
828	void get_shrink (CBOR *self)	1406	void get_shrink (CBOR *self)
829	ALIAS:	1407	ALIAS:
830	get_shrink = F_SHRINK	1408	get_shrink = F_SHRINK
831	get_allow_unknown = F_ALLOW_UNKNOWN	1409	get_allow_unknown = F_ALLOW_UNKNOWN
		1410	get_allow_sharing = F_ALLOW_SHARING
		1411	get_allow_cycles = F_ALLOW_CYCLES
		1412	get_pack_strings = F_PACK_STRINGS
		1413	get_validate_utf8 = F_VALIDATE_UTF8
832	PPCODE:	1414	PPCODE:
833	XPUSHs (boolSV (self->flags & ix));	1415	XPUSHs (boolSV (self->flags & ix));
834		1416
835	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1417	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
836	PPCODE:	1418	PPCODE:
…		…
852	CODE:	1434	CODE:
853	RETVAL = self->max_size;	1435	RETVAL = self->max_size;
854	OUTPUT:	1436	OUTPUT:
855	RETVAL	1437	RETVAL
856		1438
857	#if 0 //TODO	1439	void filter (CBOR *self, SV *filter = 0)
858
859	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
860	PPCODE:	1440	PPCODE:
861	{
862	SvREFCNT_dec (self->cb_object);	1441	SvREFCNT_dec (self->filter);
863	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1442	self->filter = filter ? newSVsv (filter) : filter;
864
865	XPUSHs (ST (0));	1443	XPUSHs (ST (0));
866	}
867		1444
868	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1445	SV *get_filter (CBOR *self)
869	PPCODE:	1446	CODE:
870	{	1447	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
871	if (!self->cb_sk_object)	1448	OUTPUT:
872	self->cb_sk_object = newHV ();	1449	RETVAL
873
874	if (SvOK (cb))
875	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
876	else
877	{
878	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
879
880	if (!HvKEYS (self->cb_sk_object))
881	{
882	SvREFCNT_dec (self->cb_sk_object);
883	self->cb_sk_object = 0;
884	}
885	}
886
887	XPUSHs (ST (0));
888	}
889
890	#endif
891		1450
892	void encode (CBOR *self, SV *scalar)	1451	void encode (CBOR *self, SV *scalar)
893	PPCODE:	1452	PPCODE:
894	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1453	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
895	XPUSHs (scalar);	1454	XPUSHs (scalar);
…		…
908	EXTEND (SP, 2);	1467	EXTEND (SP, 2);
909	PUSHs (sv);	1468	PUSHs (sv);
910	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1469	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
911	}	1470	}
912		1471
913	#if 0	1472	void incr_parse (CBOR *self, SV *cborstr)
		1473	ALIAS:
		1474	incr_parse_multiple = 1
		1475	PPCODE:
		1476	{
		1477	if (SvUTF8 (cborstr))
		1478	sv_utf8_downgrade (cborstr, 0);
		1479
		1480	if (!self->incr_count)
		1481	{
		1482	self->incr_count = newAV ();
		1483	self->incr_pos = 0;
		1484	self->incr_need = 1;
		1485
		1486	av_push (self->incr_count, newSViv (1));
		1487	}
		1488
		1489	do
		1490	{
		1491	if (!incr_parse (self, cborstr))
		1492	{
		1493	if (self->incr_need > self->max_size && self->max_size)
		1494	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1495	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1496
		1497	break;
		1498	}
		1499
		1500	SV *sv;
		1501	char *offset;
		1502
		1503	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1504	XPUSHs (sv);
		1505
		1506	sv_chop (cborstr, offset);
		1507
		1508	av_clear (self->incr_count);
		1509	av_push (self->incr_count, newSViv (1));
		1510
		1511	self->incr_pos = 0;
		1512	self->incr_need = self->incr_pos + 1;
		1513	}
		1514	while (ix);
		1515	}
		1516
		1517	void incr_reset (CBOR *self)
		1518	CODE:
		1519	{
		1520	SvREFCNT_dec (self->incr_count);
		1521	self->incr_count = 0;
		1522	}
914		1523
915	void DESTROY (CBOR *self)	1524	void DESTROY (CBOR *self)
916	CODE:	1525	PPCODE:
917	SvREFCNT_dec (self->cb_sk_object);	1526	cbor_free (self);
918	SvREFCNT_dec (self->cb_object);
919
920	#endif
921		1527
922	PROTOTYPES: ENABLE	1528	PROTOTYPES: ENABLE
923		1529
924	void encode_cbor (SV *scalar)	1530	void encode_cbor (SV *scalar)
		1531	ALIAS:
		1532	encode_cbor = 0
		1533	encode_cbor_sharing = F_ALLOW_SHARING
925	PPCODE:	1534	PPCODE:
926	{	1535	{
927	CBOR cbor;	1536	CBOR cbor;
928	cbor_init (&cbor);	1537	cbor_init (&cbor);
		1538	cbor.flags |= ix;
929	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1539	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
930	XPUSHs (scalar);	1540	XPUSHs (scalar);
931	}	1541	}
932		1542
933	void decode_cbor (SV *cborstr)	1543	void decode_cbor (SV *cborstr)

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