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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 1.45 by root, Sun Dec 14 05:48:39 2014 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	encode_sv (enc, AvARRAY (av)[i]);
186		338
187	--enc->depth;	339	--enc->depth;
188	}	340	}
189		341
190	static void	342	static void
…		…
199		351
200	int pairs = hv_iterinit (hv);	352	int pairs = hv_iterinit (hv);
201	int mg = SvMAGICAL (hv);	353	int mg = SvMAGICAL (hv);
202		354
203	if (mg)	355	if (mg)
204	encode_ch (enc, 0xa0 | 31);	356	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
205	else	357	else
206	encode_uint (enc, 0xa0, pairs);	358	encode_uint (enc, MAJOR_MAP, pairs);
207		359
208	while ((he = hv_iternext (hv)))	360	while ((he = hv_iternext (hv)))
209	{	361	{
210	if (HeKLEN (he) == HEf_SVKEY)	362	if (HeKLEN (he) == HEf_SVKEY)
211	encode_sv (enc, HeSVKEY (he));	363	encode_sv (enc, HeSVKEY (he));
212	else	364	else
213	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	365	encode_strref (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));
214		366
215	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	367	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
216	}	368	}
217		369
218	if (mg)	370	if (mg)
219	encode_ch (enc, 0xe0 | 31);	371	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
220		372
221	--enc->depth;	373	--enc->depth;
222	}	374	}
223		375
224	// encode objects, arrays and special \0=false and \1=true values.	376	// encode objects, arrays and special \0=false and \1=true values.
225	static void	377	static void
226	encode_rv (enc_t *enc, SV *sv)	378	encode_rv (enc_t *enc, SV *sv)
227	{	379	{
228	svtype svt;
229
230	SvGETMAGIC (sv);	380	SvGETMAGIC (sv);
		381
231	svt = SvTYPE (sv);	382	svtype svt = SvTYPE (sv);
232		383
233	if (ecb_expect_false (SvOBJECT (sv)))	384	if (ecb_expect_false (SvOBJECT (sv)))
234	{	385	{
235	HV *boolean_stash = !CBOR_SLOW || cbor_boolean_stash	386	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
236	? cbor_boolean_stash	387	? types_boolean_stash
237	: gv_stashpv ("CBOR::XS::Boolean", 1);	388	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		389	HV *error_stash = !CBOR_SLOW || types_error_stash
		390	? types_error_stash
		391	: gv_stashpv ("Types::Serialiser::Error", 1);
238	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	392	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
239	? cbor_tagged_stash	393	? cbor_tagged_stash
240	: gv_stashpv ("CBOR::XS::Tagged" , 1);	394	: gv_stashpv ("CBOR::XS::Tagged" , 1);
241		395
		396	HV *stash = SvSTASH (sv);
		397
242	if (SvSTASH (sv) == boolean_stash)	398	if (stash == boolean_stash)
243	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	399	{
		400	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		401	return;
		402	}
		403	else if (stash == error_stash)
		404	{
		405	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		406	return;
		407	}
244	else if (SvSTASH (sv) == tagged_stash)	408	else if (stash == tagged_stash)
245	{	409	{
246	if (svt != SVt_PVAV)	410	if (svt != SVt_PVAV)
247	croak ("encountered CBOR::XS::Tagged object that isn't an array");	411	croak ("encountered CBOR::XS::Tagged object that isn't an array");
248		412
249	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	413	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
250	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));	414	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		415
		416	return;
		417	}
		418	}
		419
		420	if (ecb_expect_false (SvREFCNT (sv) > 1)
		421	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		422	{
		423	if (!enc->shareable)
		424	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		425
		426	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		427
		428	if (SvOK (*svp))
		429	{
		430	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		431	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		432	return;
251	}	433	}
252	else	434	else
253	{	435	{
		436	sv_setuv (*svp, enc->shareable_idx);
		437	++enc->shareable_idx;
		438	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		439	}
		440	}
		441
		442	if (ecb_expect_false (SvOBJECT (sv)))
		443	{
		444	HV *stash = SvSTASH (sv);
		445	GV *method;
		446
		447	if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
		448	{
		449	dSP;
		450
		451	ENTER; SAVETMPS; PUSHMARK (SP);
254	// we re-bless the reference to get overload and other niceties right	452	// 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)));	453	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
263		454
264	// calling with G_SCALAR ensures that we always get a 1 return value
265	PUTBACK;	455	PUTBACK;
		456	// G_SCALAR ensures that return value is 1
266	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	457	call_sv ((SV *)GvCV (method), G_SCALAR);
267	SPAGAIN;	458	SPAGAIN;
268		459
269	// catch this surprisingly common error	460	// catch this surprisingly common error
270	if (SvROK (TOPs) && SvRV (TOPs) == sv)	461	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)));	462	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
272		463
273	sv = POPs;	464	encode_sv (enc, POPs);
		465
274	PUTBACK;	466	PUTBACK;
275		467
276	encode_sv (enc, sv);
277
278	FREETMPS; LEAVE;	468	FREETMPS; LEAVE;
279	}	469	}
		470	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
		471	{
		472	dSP;
		473
		474	ENTER; SAVETMPS; PUSHMARK (SP);
		475	EXTEND (SP, 2);
		476	// we re-bless the reference to get overload and other niceties right
		477	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		478	PUSHs (sv_cbor);
		479
		480	PUTBACK;
		481	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		482	SPAGAIN;
		483
		484	// catch this surprisingly common error
		485	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		486	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		487
		488	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		489	encode_uint (enc, MAJOR_ARRAY, count + 1);
		490	encode_strref (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		491
		492	while (count)
		493	encode_sv (enc, SP[1 - count--]);
		494
		495	PUTBACK;
		496
		497	FREETMPS; LEAVE;
		498	}
280	else	499	else
281	croak ("encountered object '%s', but no TO_CBOR method available on it",	500	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
282	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	501	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
283	}
284	}	502	}
285	else if (svt == SVt_PVHV)	503	else if (svt == SVt_PVHV)
286	encode_hv (enc, (HV *)sv);	504	encode_hv (enc, (HV *)sv);
287	else if (svt == SVt_PVAV)	505	else if (svt == SVt_PVAV)
288	encode_av (enc, (AV *)sv);	506	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	507	else
307	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	508	{
308	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	509	encode_tag (enc, CBOR_TAG_INDIRECTION);
		510	encode_sv (enc, sv);
		511	}
309	}	512	}
310		513
311	static void	514	static void
312	encode_nv (enc_t *enc, SV *sv)	515	encode_nv (enc_t *enc, SV *sv)
313	{	516	{
314	double nv = SvNVX (sv);	517	double nv = SvNVX (sv);
315		518
316	need (enc, 9);	519	need (enc, 9);
317		520
318	if (ecb_expect_false (nv == (U32)nv))	521	if (ecb_expect_false (nv == (NV)(U32)nv))
319	encode_uint (enc, 0x00, (U32)nv);	522	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
320	//TODO: maybe I32?	523	//TODO: maybe I32?
321	else if (ecb_expect_false (nv == (float)nv))	524	else if (ecb_expect_false (nv == (float)nv))
322	{	525	{
323	uint32_t fp = ecb_float_to_binary32 (nv);	526	uint32_t fp = ecb_float_to_binary32 (nv);
324		527
325	*enc->cur++ = 0xe0 | 26;	528	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
326		529
327	if (!ecb_big_endian ())	530	if (!ecb_big_endian ())
328	fp = ecb_bswap32 (fp);	531	fp = ecb_bswap32 (fp);
329		532
330	memcpy (enc->cur, &fp, 4);	533	memcpy (enc->cur, &fp, 4);
…		…
332	}	535	}
333	else	536	else
334	{	537	{
335	uint64_t fp = ecb_double_to_binary64 (nv);	538	uint64_t fp = ecb_double_to_binary64 (nv);
336		539
337	*enc->cur++ = 0xe0 | 27;	540	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
338		541
339	if (!ecb_big_endian ())	542	if (!ecb_big_endian ())
340	fp = ecb_bswap64 (fp);	543	fp = ecb_bswap64 (fp);
341		544
342	memcpy (enc->cur, &fp, 8);	545	memcpy (enc->cur, &fp, 8);
…		…
351		554
352	if (SvPOKp (sv))	555	if (SvPOKp (sv))
353	{	556	{
354	STRLEN len;	557	STRLEN len;
355	char *str = SvPV (sv, len);	558	char *str = SvPV (sv, len);
356	encode_str (enc, SvUTF8 (sv), str, len);	559	encode_strref (enc, SvUTF8 (sv), str, len);
357	}	560	}
358	else if (SvNOKp (sv))	561	else if (SvNOKp (sv))
359	encode_nv (enc, sv);	562	encode_nv (enc, sv);
360	else if (SvIOKp (sv))	563	else if (SvIOKp (sv))
361	{	564	{
362	if (SvIsUV (sv))	565	if (SvIsUV (sv))
363	encode_uint (enc, 0x00, SvUVX (sv));	566	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
364	else if (SvIVX (sv) >= 0)	567	else if (SvIVX (sv) >= 0)
365	encode_uint (enc, 0x00, SvIVX (sv));	568	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
366	else	569	else
367	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	570	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
368	}	571	}
369	else if (SvROK (sv))	572	else if (SvROK (sv))
370	encode_rv (enc, SvRV (sv));	573	encode_rv (enc, SvRV (sv));
371	else if (!SvOK (sv))	574	else if (!SvOK (sv))
372	encode_ch (enc, 0xe0 | 22);	575	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
373	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	576	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
374	encode_ch (enc, 0xe0 | 23);	577	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
375	else	578	else
376	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	579	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
377	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	580	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
378	}	581	}
379		582
380	static SV *	583	static SV *
381	encode_cbor (SV *scalar, CBOR *cbor)	584	encode_cbor (SV *scalar, CBOR *cbor)
382	{	585	{
383	enc_t enc;	586	enc_t enc = { };
384		587
385	enc.cbor = *cbor;	588	enc.cbor = *cbor;
386	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	589	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
387	enc.cur = SvPVX (enc.sv);	590	enc.cur = SvPVX (enc.sv);
388	enc.end = SvEND (enc.sv);	591	enc.end = SvEND (enc.sv);
389	enc.depth = 0;
390		592
391	SvPOK_only (enc.sv);	593	SvPOK_only (enc.sv);
		594
		595	if (cbor->flags & F_PACK_STRINGS)
		596	{
		597	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		598	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		599	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		600	}
		601
392	encode_sv (&enc, scalar);	602	encode_sv (&enc, scalar);
393		603
394	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	604	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
395	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	605	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
396		606
…		…
410	U8 *end; // end of input string	620	U8 *end; // end of input string
411	const char *err; // parse error, if != 0	621	const char *err; // parse error, if != 0
412	CBOR cbor;	622	CBOR cbor;
413	U32 depth; // recursion depth	623	U32 depth; // recursion depth
414	U32 maxdepth; // recursion depth limit	624	U32 maxdepth; // recursion depth limit
		625	AV *shareable;
		626	AV *stringref;
		627	SV *decode_tagged;
415	} dec_t;	628	} dec_t;
416		629
417	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	630	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE
418		631
419	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	632	#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	635	#define DEC_DEC_DEPTH --dec->depth
423		636
424	static UV	637	static UV
425	decode_uint (dec_t *dec)	638	decode_uint (dec_t *dec)
426	{	639	{
427	switch (*dec->cur & 31)	640	U8 m = *dec->cur & MINOR_MASK;
428	{	641	++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		642
434	case 24:	643	if (ecb_expect_true (m < LENGTH_EXT1))
		644	return m;
		645	else if (ecb_expect_true (m == LENGTH_EXT1))
		646	{
435	WANT (2);	647	WANT (1);
436	dec->cur += 2;	648	dec->cur += 1;
437	return dec->cur[-1];	649	return dec->cur[-1];
438		650	}
439	case 25:	651	else if (ecb_expect_true (m == LENGTH_EXT2))
		652	{
440	WANT (3);	653	WANT (2);
441	dec->cur += 3;	654	dec->cur += 2;
442	return (((UV)dec->cur[-2]) << 8)	655	return (((UV)dec->cur[-2]) << 8)
443	| ((UV)dec->cur[-1]);	656	| ((UV)dec->cur[-1]);
444		657	}
445	case 26:	658	else if (ecb_expect_true (m == LENGTH_EXT4))
		659	{
446	WANT (5);	660	WANT (4);
447	dec->cur += 5;	661	dec->cur += 4;
448	return (((UV)dec->cur[-4]) << 24)	662	return (((UV)dec->cur[-4]) << 24)
449	| (((UV)dec->cur[-3]) << 16)	663	| (((UV)dec->cur[-3]) << 16)
450	| (((UV)dec->cur[-2]) << 8)	664	| (((UV)dec->cur[-2]) << 8)
451	| ((UV)dec->cur[-1]);	665	| ((UV)dec->cur[-1]);
452		666	}
453	case 27:	667	else if (ecb_expect_true (m == LENGTH_EXT8))
		668	{
454	WANT (9);	669	WANT (8);
455	dec->cur += 9;	670	dec->cur += 8;
		671
		672	return
		673	#if UVSIZE < 8
		674	0
		675	#else
456	return (((UV)dec->cur[-8]) << 56)	676	(((UV)dec->cur[-8]) << 56)
457	| (((UV)dec->cur[-7]) << 48)	677	| (((UV)dec->cur[-7]) << 48)
458	| (((UV)dec->cur[-6]) << 40)	678	| (((UV)dec->cur[-6]) << 40)
459	| (((UV)dec->cur[-5]) << 32)	679	| (((UV)dec->cur[-5]) << 32)
		680	#endif
460	| (((UV)dec->cur[-4]) << 24)	681	| (((UV)dec->cur[-4]) << 24)
461	| (((UV)dec->cur[-3]) << 16)	682	| (((UV)dec->cur[-3]) << 16)
462	| (((UV)dec->cur[-2]) << 8)	683	| (((UV)dec->cur[-2]) << 8)
463	| ((UV)dec->cur[-1]);	684	| ((UV)dec->cur[-1]);
464		685	}
465	default:	686	else
466	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	687	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
467	}
468		688
469	fail:	689	fail:
470	return 0;	690	return 0;
471	}	691	}
472		692
…		…
477	{	697	{
478	AV *av = newAV ();	698	AV *av = newAV ();
479		699
480	DEC_INC_DEPTH;	700	DEC_INC_DEPTH;
481		701
482	if ((*dec->cur & 31) == 31)	702	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
483	{	703	{
484	++dec->cur;	704	++dec->cur;
485		705
486	for (;;)	706	for (;;)
487	{	707	{
488	WANT (1);	708	WANT (1);
489		709
490	if (*dec->cur == (0xe0 | 31))	710	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
491	{	711	{
492	++dec->cur;	712	++dec->cur;
493	break;	713	break;
494	}	714	}
495		715
…		…
498	}	718	}
499	else	719	else
500	{	720	{
501	int i, len = decode_uint (dec);	721	int i, len = decode_uint (dec);
502		722
		723	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);	724	av_fill (av, len - 1);
504		725
505	for (i = 0; i < len; ++i)	726	for (i = 0; i < len; ++i)
506	AvARRAY (av)[i] = decode_sv (dec);	727	AvARRAY (av)[i] = decode_sv (dec);
507	}	728	}
…		…
513	SvREFCNT_dec (av);	734	SvREFCNT_dec (av);
514	DEC_DEC_DEPTH;	735	DEC_DEC_DEPTH;
515	return &PL_sv_undef;	736	return &PL_sv_undef;
516	}	737	}
517		738
		739	static void
		740	decode_he (dec_t *dec, HV *hv)
		741	{
		742	// for speed reasons, we specialcase single-string
		743	// byte or utf-8 strings as keys, but only when !stringref
		744
		745	if (ecb_expect_true (!dec->stringref))
		746	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		747	{
		748	I32 len = decode_uint (dec);
		749	char *key = (char *)dec->cur;
		750
		751	dec->cur += len;
		752
		753	hv_store (hv, key, len, decode_sv (dec), 0);
		754
		755	return;
		756	}
		757	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		758	{
		759	I32 len = decode_uint (dec);
		760	char *key = (char *)dec->cur;
		761
		762	dec->cur += len;
		763
		764	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		765	if (!is_utf8_string (key, len))
		766	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		767
		768	hv_store (hv, key, -len, decode_sv (dec), 0);
		769
		770	return;
		771	}
		772
		773	SV *k = decode_sv (dec);
		774	SV *v = decode_sv (dec);
		775
		776	hv_store_ent (hv, k, v, 0);
		777	SvREFCNT_dec (k);
		778
		779	fail:
		780	;
		781	}
		782
518	static SV *	783	static SV *
519	decode_hv (dec_t *dec)	784	decode_hv (dec_t *dec)
520	{	785	{
521	HV *hv = newHV ();	786	HV *hv = newHV ();
522		787
523	DEC_INC_DEPTH;	788	DEC_INC_DEPTH;
524		789
525	if ((*dec->cur & 31) == 31)	790	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
526	{	791	{
527	++dec->cur;	792	++dec->cur;
528		793
529	for (;;)	794	for (;;)
530	{	795	{
531	WANT (1);	796	WANT (1);
532		797
533	if (*dec->cur == (0xe0 | 31))	798	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
534	{	799	{
535	++dec->cur;	800	++dec->cur;
536	break;	801	break;
537	}	802	}
538		803
539	SV *k = decode_sv (dec);	804	decode_he (dec, hv);
540	SV *v = decode_sv (dec);
541
542	hv_store_ent (hv, k, v, 0);
543	}	805	}
544	}	806	}
545	else	807	else
546	{	808	{
547	int len = decode_uint (dec);	809	int pairs = decode_uint (dec);
548		810
549	while (len--)	811	while (pairs--)
550	{	812	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	}	813	}
557		814
558	DEC_DEC_DEPTH;	815	DEC_DEC_DEPTH;
559	return newRV_noinc ((SV *)hv);	816	return newRV_noinc ((SV *)hv);
560		817
…		…
567	static SV *	824	static SV *
568	decode_str (dec_t *dec, int utf8)	825	decode_str (dec_t *dec, int utf8)
569	{	826	{
570	SV *sv = 0;	827	SV *sv = 0;
571		828
572	if ((*dec->cur & 31) == 31)	829	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
573	{	830	{
		831	// indefinite length strings
574	++dec->cur;	832	++dec->cur;
575		833
		834	U8 major = *dec->cur & MAJOR_MISC;
		835
576	sv = newSVpvn ("", 0);	836	sv = newSVpvn ("", 0);
577		837
578	// not very fast, and certainly not robust against illegal input
579	for (;;)	838	for (;;)
580	{	839	{
581	WANT (1);	840	WANT (1);
582		841
583	if (*dec->cur == (0xe0 | 31))	842	if ((*dec->cur - major) > LENGTH_EXT8)
		843	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
584	{	844	{
585	++dec->cur;	845	++dec->cur;
586	break;	846	break;
587	}	847	}
		848	else
		849	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
588		850
589	sv_catsv (sv, decode_sv (dec));	851	STRLEN len = decode_uint (dec);
		852
		853	WANT (len);
		854	sv_catpvn (sv, dec->cur, len);
		855	dec->cur += len;
590	}	856	}
591	}	857	}
592	else	858	else
593	{	859	{
594	STRLEN len = decode_uint (dec);	860	STRLEN len = decode_uint (dec);
595		861
596	WANT (len);	862	WANT (len);
597	sv = newSVpvn (dec->cur, len);	863	sv = newSVpvn (dec->cur, len);
598	dec->cur += len;	864	dec->cur += len;
		865
		866	if (ecb_expect_false (dec->stringref)
		867	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		868	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
599	}	869	}
600		870
601	if (utf8)	871	if (utf8)
		872	{
		873	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		874	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		875	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		876
602	SvUTF8_on (sv);	877	SvUTF8_on (sv);
		878	}
603		879
604	return sv;	880	return sv;
605		881
606	fail:	882	fail:
607	SvREFCNT_dec (sv);	883	SvREFCNT_dec (sv);
…		…
609	}	885	}
610		886
611	static SV *	887	static SV *
612	decode_tagged (dec_t *dec)	888	decode_tagged (dec_t *dec)
613	{	889	{
		890	SV *sv = 0;
614	UV tag = decode_uint (dec);	891	UV tag = decode_uint (dec);
		892
		893	WANT (1);
		894
		895	switch (tag)
		896	{
		897	case CBOR_TAG_MAGIC:
615	SV *sv = decode_sv (dec);	898	sv = decode_sv (dec);
		899	break;
616		900
617	if (tag == 55799) // 2.4.5 Self-Describe CBOR	901	case CBOR_TAG_INDIRECTION:
		902	sv = newRV_noinc (decode_sv (dec));
		903	break;
		904
		905	case CBOR_TAG_STRINGREF_NAMESPACE:
		906	{
		907	ENTER; SAVETMPS;
		908
		909	SAVESPTR (dec->stringref);
		910	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		911
		912	sv = decode_sv (dec);
		913
		914	FREETMPS; LEAVE;
		915	}
		916	break;
		917
		918	case CBOR_TAG_STRINGREF:
		919	{
		920	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		921	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		922
		923	UV idx = decode_uint (dec);
		924
		925	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		926	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		927
		928	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		929	}
		930	break;
		931
		932	case CBOR_TAG_VALUE_SHAREABLE:
		933	{
		934	if (ecb_expect_false (!dec->shareable))
		935	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		936
		937	if (dec->cbor.flags & F_ALLOW_CYCLES)
		938	{
		939	sv = newSV (0);
		940	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		941
		942	SV *osv = decode_sv (dec);
		943	sv_setsv (sv, osv);
		944	SvREFCNT_dec_NN (osv);
		945	}
		946	else
		947	{
		948	av_push (dec->shareable, &PL_sv_undef);
		949	int idx = AvFILLp (dec->shareable);
		950	sv = decode_sv (dec);
		951	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		952	}
		953	}
		954	break;
		955
		956	case CBOR_TAG_VALUE_SHAREDREF:
		957	{
		958	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		959	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		960
		961	UV idx = decode_uint (dec);
		962
		963	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		964	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		965
		966	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		967
		968	if (sv == &PL_sv_undef)
		969	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		970	}
		971	break;
		972
		973	case CBOR_TAG_PERL_OBJECT:
		974	{
		975	sv = decode_sv (dec);
		976
		977	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		978	ERR ("corrupted CBOR data (non-array perl object)");
		979
		980	AV *av = (AV *)SvRV (sv);
		981	int len = av_len (av) + 1;
		982	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		983
		984	if (!stash)
		985	ERR ("cannot decode perl-object (package does not exist)");
		986
		987	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		988
		989	if (!method)
		990	ERR ("cannot decode perl-object (package does not have a THAW method)");
		991
		992	dSP;
		993
		994	ENTER; SAVETMPS; PUSHMARK (SP);
		995	EXTEND (SP, len + 1);
		996	// we re-bless the reference to get overload and other niceties right
		997	PUSHs (*av_fetch (av, 0, 1));
		998	PUSHs (sv_cbor);
		999
		1000	int i;
		1001
		1002	for (i = 1; i < len; ++i)
		1003	PUSHs (*av_fetch (av, i, 1));
		1004
		1005	PUTBACK;
		1006	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1007	SPAGAIN;
		1008
		1009	if (SvTRUE (ERRSV))
		1010	{
		1011	FREETMPS; LEAVE;
		1012	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1013	}
		1014
		1015	SvREFCNT_dec (sv);
		1016	sv = SvREFCNT_inc (POPs);
		1017
		1018	PUTBACK;
		1019
		1020	FREETMPS; LEAVE;
		1021	}
		1022	break;
		1023
		1024	default:
		1025	{
		1026	sv = decode_sv (dec);
		1027
		1028	dSP;
		1029	ENTER; SAVETMPS; PUSHMARK (SP);
		1030	EXTEND (SP, 2);
		1031	PUSHs (newSVuv (tag));
		1032	PUSHs (sv);
		1033
		1034	PUTBACK;
		1035	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1036	SPAGAIN;
		1037
		1038	if (SvTRUE (ERRSV))
		1039	{
		1040	FREETMPS; LEAVE;
		1041	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1042	}
		1043
		1044	if (count)
		1045	{
		1046	SvREFCNT_dec (sv);
		1047	sv = SvREFCNT_inc (POPs);
		1048	}
		1049	else
		1050	{
		1051	AV *av = newAV ();
		1052	av_push (av, newSVuv (tag));
		1053	av_push (av, sv);
		1054
		1055	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1056	? cbor_tagged_stash
		1057	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1058	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1059	}
		1060
		1061	PUTBACK;
		1062
		1063	FREETMPS; LEAVE;
		1064	}
		1065	break;
		1066	}
		1067
618	return sv;	1068	return sv;
619		1069
620	AV *av = newAV ();	1070	fail:
621	av_push (av, newSVuv (tag));	1071	SvREFCNT_dec (sv);
622	av_push (av, sv);	1072	return &PL_sv_undef;
623	return newRV_noinc ((SV *)av);
624	}	1073	}
625		1074
626	static SV *	1075	static SV *
627	decode_sv (dec_t *dec)	1076	decode_sv (dec_t *dec)
628	{	1077	{
629	WANT (1);	1078	WANT (1);
630		1079
631	switch (*dec->cur >> 5)	1080	switch (*dec->cur >> MAJOR_SHIFT)
632	{	1081	{
633	case 0: // unsigned int	1082	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
634	return newSVuv (decode_uint (dec));	1083	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
635	case 1: // negative int	1084	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
636	return newSViv (-1 - (IV)decode_uint (dec));	1085	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
637	case 2: // octet string	1086	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
638	return decode_str (dec, 0);	1087	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
639	case 3: // utf-8 string	1088	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
640	return decode_str (dec, 1);	1089
641	case 4: // array	1090	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)	1091	switch (*dec->cur++ & MINOR_MASK)
649	{	1092	{
650	case 20:	1093	case SIMPLE_FALSE:
651	#if CBOR_SLOW	1094	#if CBOR_SLOW
652	cbor_false = get_bool ("CBOR::XS::false");	1095	types_false = get_bool ("Types::Serialiser::false");
653	#endif	1096	#endif
654	return newSVsv (cbor_false);	1097	return newSVsv (types_false);
655	case 21:	1098	case SIMPLE_TRUE:
656	#if CBOR_SLOW	1099	#if CBOR_SLOW
657	cbor_true = get_bool ("CBOR::XS::true");	1100	types_true = get_bool ("Types::Serialiser::true");
658	#endif	1101	#endif
659	return newSVsv (cbor_true);	1102	return newSVsv (types_true);
660	case 22:	1103	case SIMPLE_NULL:
661	return newSVsv (&PL_sv_undef);	1104	return newSVsv (&PL_sv_undef);
		1105	case SIMPLE_UNDEF:
		1106	#if CBOR_SLOW
		1107	types_error = get_bool ("Types::Serialiser::error");
		1108	#endif
		1109	return newSVsv (types_error);
662		1110
663	case 25:	1111	case MISC_FLOAT16:
664	{	1112	{
665	WANT (2);	1113	WANT (2);
666		1114
667	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1115	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
668	dec->cur += 2;	1116	dec->cur += 2;
669		1117
670	return newSVnv (ecb_binary16_to_float (fp));	1118	return newSVnv (ecb_binary16_to_float (fp));
671	}	1119	}
672		1120
673	case 26:	1121	case MISC_FLOAT32:
674	{	1122	{
675	uint32_t fp;	1123	uint32_t fp;
676	WANT (4);	1124	WANT (4);
677	memcpy (&fp, dec->cur, 4);	1125	memcpy (&fp, dec->cur, 4);
678	dec->cur += 4;	1126	dec->cur += 4;
…		…
681	fp = ecb_bswap32 (fp);	1129	fp = ecb_bswap32 (fp);
682		1130
683	return newSVnv (ecb_binary32_to_float (fp));	1131	return newSVnv (ecb_binary32_to_float (fp));
684	}	1132	}
685		1133
686	case 27:	1134	case MISC_FLOAT64:
687	{	1135	{
688	uint64_t fp;	1136	uint64_t fp;
689	WANT (8);	1137	WANT (8);
690	memcpy (&fp, dec->cur, 8);	1138	memcpy (&fp, dec->cur, 8);
691	dec->cur += 8;	1139	dec->cur += 8;
…		…
694	fp = ecb_bswap64 (fp);	1142	fp = ecb_bswap64 (fp);
695		1143
696	return newSVnv (ecb_binary64_to_double (fp));	1144	return newSVnv (ecb_binary64_to_double (fp));
697	}	1145	}
698		1146
699	// 0..19 unassigned	1147	// 0..19 unassigned simple
700	// 24 reserved + unassigned (reserved values are not encodable)	1148	// 24 reserved + unassigned simple (reserved values are not encodable)
		1149	// 28-30 unassigned misc
		1150	// 31 break code
701	default:	1151	default:
702	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1152	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
703	}	1153	}
704		1154
705	break;	1155	break;
706	}	1156	}
707		1157
…		…
710	}	1160	}
711		1161
712	static SV *	1162	static SV *
713	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1163	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
714	{	1164	{
715	dec_t dec;	1165	dec_t dec = { };
716	SV *sv;	1166	SV *sv;
		1167	STRLEN len;
		1168	char *data = SvPVbyte (string, len);
717		1169
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)	1170	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",	1171	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);	1172	(unsigned long)len, (unsigned long)cbor->max_size);
749	}
750
751	sv_utf8_downgrade (string, 0);
752		1173
753	dec.cbor = *cbor;	1174	dec.cbor = *cbor;
754	dec.cur = (U8 *)SvPVX (string);	1175	dec.cur = (U8 *)data;
755	dec.end = (U8 *)SvEND (string);	1176	dec.end = (U8 *)data + len;
756	dec.err = 0;
757	dec.depth = 0;
758		1177
759	sv = decode_sv (&dec);	1178	sv = decode_sv (&dec);
760		1179
761	if (offset_return)	1180	if (offset_return)
762	*offset_return = dec.cur;	1181	*offset_return = dec.cur;
…		…
765	if (dec.cur != dec.end && !dec.err)	1184	if (dec.cur != dec.end && !dec.err)
766	dec.err = "garbage after CBOR object";	1185	dec.err = "garbage after CBOR object";
767		1186
768	if (dec.err)	1187	if (dec.err)
769	{	1188	{
		1189	if (dec.shareable)
		1190	{
		1191	// need to break cyclic links, which whould all be in shareable
		1192	int i;
		1193	SV **svp;
		1194
		1195	for (i = av_len (dec.shareable) + 1; i--; )
		1196	if ((svp = av_fetch (dec.shareable, i, 0)))
		1197	sv_setsv (*svp, &PL_sv_undef);
		1198	}
		1199
770	SvREFCNT_dec (sv);	1200	SvREFCNT_dec (sv);
771	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1201	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
772	}	1202	}
773		1203
774	sv = sv_2mortal (sv);	1204	sv = sv_2mortal (sv);
775		1205
776	return sv;	1206	return sv;
777	}	1207	}
778		1208
		1209	/////////////////////////////////////////////////////////////////////////////
		1210	// incremental parser
		1211
		1212	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1213
		1214	// returns 0 for notyet, 1 for success or error
		1215	static int
		1216	incr_parse (CBOR *self, SV *cborstr)
		1217	{
		1218	STRLEN cur;
		1219	SvPV (cborstr, cur);
		1220
		1221	while (ecb_expect_true (self->incr_need <= cur))
		1222	{
		1223	// table of integer count bytes
		1224	static I8 incr_len[MINOR_MASK + 1] = {
		1225	0, 0, 0, 0, 0, 0, 0, 0,
		1226	0, 0, 0, 0, 0, 0, 0, 0,
		1227	0, 0, 0, 0, 0, 0, 0, 0,
		1228	1, 2, 4, 8,-1,-1,-1,-2
		1229	};
		1230
		1231	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1232	U8 m = *p & MINOR_MASK;
		1233	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1234	I8 ilen = incr_len[m];
		1235
		1236	self->incr_need = self->incr_pos + 1;
		1237
		1238	if (ecb_expect_false (ilen < 0))
		1239	{
		1240	if (m != MINOR_INDEF)
		1241	return 1; // error
		1242
		1243	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1244	{
		1245	if (count >= 0)
		1246	return 1; // error
		1247
		1248	count = 1;
		1249	}
		1250	else
		1251	{
		1252	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1253	count = -1;
		1254	}
		1255	}
		1256	else
		1257	{
		1258	self->incr_need += ilen;
		1259	if (ecb_expect_false (self->incr_need > cur))
		1260	return 0;
		1261
		1262	int major = *p >> MAJOR_SHIFT;
		1263
		1264	switch (major)
		1265	{
		1266	case MAJOR_BYTES >> MAJOR_SHIFT:
		1267	case MAJOR_TEXT >> MAJOR_SHIFT:
		1268	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1269	case MAJOR_MAP >> MAJOR_SHIFT:
		1270	{
		1271	UV len;
		1272
		1273	if (ecb_expect_false (ilen))
		1274	{
		1275	len = 0;
		1276
		1277	do {
		1278	len = (len << 8) | *++p;
		1279	} while (--ilen);
		1280	}
		1281	else
		1282	len = m;
		1283
		1284	switch (major)
		1285	{
		1286	case MAJOR_BYTES >> MAJOR_SHIFT:
		1287	case MAJOR_TEXT >> MAJOR_SHIFT:
		1288	self->incr_need += len;
		1289	if (ecb_expect_false (self->incr_need > cur))
		1290	return 0;
		1291
		1292	break;
		1293
		1294	case MAJOR_MAP >> MAJOR_SHIFT:
		1295	len <<= 1;
		1296	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1297	if (len)
		1298	{
		1299	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1300	count = len + 1;
		1301	}
		1302	break;
		1303	}
		1304	}
		1305	}
		1306	}
		1307
		1308	self->incr_pos = self->incr_need;
		1309
		1310	if (count > 0)
		1311	{
		1312	while (!--count)
		1313	{
		1314	if (!AvFILLp (self->incr_count))
		1315	return 1; // done
		1316
		1317	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1318	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1319	}
		1320
		1321	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1322	}
		1323	}
		1324
		1325	return 0;
		1326	}
		1327
		1328
779	/////////////////////////////////////////////////////////////////////////////	1329	/////////////////////////////////////////////////////////////////////////////
780	// XS interface functions	1330	// XS interface functions
781		1331
782	MODULE = CBOR::XS PACKAGE = CBOR::XS	1332	MODULE = CBOR::XS PACKAGE = CBOR::XS
783		1333
784	BOOT:	1334	BOOT:
785	{	1335	{
786	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1336	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);	1337	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
789		1338
790	cbor_true = get_bool ("CBOR::XS::true");	1339	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
791	cbor_false = get_bool ("CBOR::XS::false");	1340	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1341
		1342	types_true = get_bool ("Types::Serialiser::true" );
		1343	types_false = get_bool ("Types::Serialiser::false");
		1344	types_error = get_bool ("Types::Serialiser::error");
		1345
		1346	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1347
		1348	sv_cbor = newSVpv ("CBOR", 0);
		1349	SvREADONLY_on (sv_cbor);
792	}	1350	}
793		1351
794	PROTOTYPES: DISABLE	1352	PROTOTYPES: DISABLE
795		1353
796	void CLONE (...)	1354	void CLONE (...)
797	CODE:	1355	CODE:
798	cbor_stash = 0;	1356	cbor_stash = 0;
799	cbor_boolean_stash = 0;
800	cbor_tagged_stash = 0;	1357	cbor_tagged_stash = 0;
		1358	types_error_stash = 0;
		1359	types_boolean_stash = 0;
801		1360
802	void new (char *klass)	1361	void new (char *klass)
803	PPCODE:	1362	PPCODE:
804	{	1363	{
805	SV *pv = NEWSV (0, sizeof (CBOR));	1364	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
813		1372
814	void shrink (CBOR *self, int enable = 1)	1373	void shrink (CBOR *self, int enable = 1)
815	ALIAS:	1374	ALIAS:
816	shrink = F_SHRINK	1375	shrink = F_SHRINK
817	allow_unknown = F_ALLOW_UNKNOWN	1376	allow_unknown = F_ALLOW_UNKNOWN
		1377	allow_sharing = F_ALLOW_SHARING
		1378	allow_cycles = F_ALLOW_CYCLES
		1379	pack_strings = F_PACK_STRINGS
		1380	validate_utf8 = F_VALIDATE_UTF8
818	PPCODE:	1381	PPCODE:
819	{	1382	{
820	if (enable)	1383	if (enable)
821	self->flags |= ix;	1384	self->flags |= ix;
822	else	1385	else
…		…
827		1390
828	void get_shrink (CBOR *self)	1391	void get_shrink (CBOR *self)
829	ALIAS:	1392	ALIAS:
830	get_shrink = F_SHRINK	1393	get_shrink = F_SHRINK
831	get_allow_unknown = F_ALLOW_UNKNOWN	1394	get_allow_unknown = F_ALLOW_UNKNOWN
		1395	get_allow_sharing = F_ALLOW_SHARING
		1396	get_allow_cycles = F_ALLOW_CYCLES
		1397	get_pack_strings = F_PACK_STRINGS
		1398	get_validate_utf8 = F_VALIDATE_UTF8
832	PPCODE:	1399	PPCODE:
833	XPUSHs (boolSV (self->flags & ix));	1400	XPUSHs (boolSV (self->flags & ix));
834		1401
835	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1402	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
836	PPCODE:	1403	PPCODE:
…		…
852	CODE:	1419	CODE:
853	RETVAL = self->max_size;	1420	RETVAL = self->max_size;
854	OUTPUT:	1421	OUTPUT:
855	RETVAL	1422	RETVAL
856		1423
857	#if 0 //TODO	1424	void filter (CBOR *self, SV *filter = 0)
858
859	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
860	PPCODE:	1425	PPCODE:
861	{
862	SvREFCNT_dec (self->cb_object);	1426	SvREFCNT_dec (self->filter);
863	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1427	self->filter = filter ? newSVsv (filter) : filter;
864
865	XPUSHs (ST (0));	1428	XPUSHs (ST (0));
866	}
867		1429
868	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1430	SV *get_filter (CBOR *self)
869	PPCODE:	1431	CODE:
870	{	1432	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
871	if (!self->cb_sk_object)	1433	OUTPUT:
872	self->cb_sk_object = newHV ();	1434	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		1435
892	void encode (CBOR *self, SV *scalar)	1436	void encode (CBOR *self, SV *scalar)
893	PPCODE:	1437	PPCODE:
894	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1438	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
895	XPUSHs (scalar);	1439	XPUSHs (scalar);
…		…
908	EXTEND (SP, 2);	1452	EXTEND (SP, 2);
909	PUSHs (sv);	1453	PUSHs (sv);
910	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1454	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
911	}	1455	}
912		1456
913	#if 0	1457	void incr_parse (CBOR *self, SV *cborstr)
		1458	ALIAS:
		1459	incr_parse_multiple = 1
		1460	PPCODE:
		1461	{
		1462	if (SvUTF8 (cborstr))
		1463	sv_utf8_downgrade (cborstr, 0);
		1464
		1465	if (!self->incr_count)
		1466	{
		1467	self->incr_count = newAV ();
		1468	self->incr_pos = 0;
		1469	self->incr_need = 1;
		1470
		1471	av_push (self->incr_count, newSViv (1));
		1472	}
		1473
		1474	do
		1475	{
		1476	if (!incr_parse (self, cborstr))
		1477	{
		1478	if (self->incr_need > self->max_size && self->max_size)
		1479	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1480	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1481
		1482	break;
		1483	}
		1484
		1485	SV *sv;
		1486	char *offset;
		1487
		1488	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1489	XPUSHs (sv);
		1490
		1491	sv_chop (cborstr, offset);
		1492
		1493	av_clear (self->incr_count);
		1494	av_push (self->incr_count, newSViv (1));
		1495
		1496	self->incr_pos = 0;
		1497	self->incr_need = self->incr_pos + 1;
		1498	}
		1499	while (ix);
		1500	}
		1501
		1502	void incr_reset (CBOR *self)
		1503	CODE:
		1504	{
		1505	SvREFCNT_dec (self->incr_count);
		1506	self->incr_count = 0;
		1507	}
914		1508
915	void DESTROY (CBOR *self)	1509	void DESTROY (CBOR *self)
916	CODE:	1510	PPCODE:
917	SvREFCNT_dec (self->cb_sk_object);	1511	cbor_free (self);
918	SvREFCNT_dec (self->cb_object);
919
920	#endif
921		1512
922	PROTOTYPES: ENABLE	1513	PROTOTYPES: ENABLE
923		1514
924	void encode_cbor (SV *scalar)	1515	void encode_cbor (SV *scalar)
		1516	ALIAS:
		1517	encode_cbor = 0
		1518	encode_cbor_sharing = F_ALLOW_SHARING
925	PPCODE:	1519	PPCODE:
926	{	1520	{
927	CBOR cbor;	1521	CBOR cbor;
928	cbor_init (&cbor);	1522	cbor_init (&cbor);
		1523	cbor.flags |= ix;
929	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1524	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
930	XPUSHs (scalar);	1525	XPUSHs (scalar);
931	}	1526	}
932		1527
933	void decode_cbor (SV *cborstr)	1528	void decode_cbor (SV *cborstr)

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