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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.12 by root, Mon Oct 28 19:06:45 2013 UTC vs.
Revision 1.40 by root, Tue Dec 10 13:54:40 2013 UTC

…		…
9	#include <limits.h>	9	#include <limits.h>
10	#include <float.h>	10	#include <float.h>
11		11
12	#include "ecb.h"	12	#include "ecb.h"
13		13
		14	// compatibility with perl <5.18
		15	#ifndef HvNAMELEN_get
		16	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		17	#endif
		18	#ifndef HvNAMELEN
		19	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		20	#endif
		21	#ifndef HvNAMEUTF8
		22	# define HvNAMEUTF8(hv) 0
		23	#endif
		24	#ifndef SvREFCNT_dec_NN
		25	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		26	#endif
		27
		28	// known major and minor types
		29	enum cbor_type
		30	{
		31	MAJOR_SHIFT = 5,
		32	MINOR_MASK = 0x1f,
		33
		34	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		35	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		36	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		37	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		38	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		39	MAJOR_MAP = 5 << MAJOR_SHIFT,
		40	MAJOR_TAG = 6 << MAJOR_SHIFT,
		41	MAJOR_MISC = 7 << MAJOR_SHIFT,
		42
		43	// INT/STRING/ARRAY/MAP subtypes
		44	LENGTH_EXT1 = 24,
		45	LENGTH_EXT2 = 25,
		46	LENGTH_EXT4 = 26,
		47	LENGTH_EXT8 = 27,
		48
		49	// SIMPLE types (effectively MISC subtypes)
		50	SIMPLE_FALSE = 20,
		51	SIMPLE_TRUE = 21,
		52	SIMPLE_NULL = 22,
		53	SIMPLE_UNDEF = 23,
		54
		55	// MISC subtype (unused)
		56	MISC_EXT1 = 24,
		57	MISC_FLOAT16 = 25,
		58	MISC_FLOAT32 = 26,
		59	MISC_FLOAT64 = 27,
		60
		61	// BYTES/TEXT/ARRAY/MAP
		62	MINOR_INDEF = 31,
		63	};
		64
14	// known tags	65	// known tags
15	enum cbor_tag	66	enum cbor_tag
16	{	67	{
17	// inofficial extensions (pending iana registration)	68	// extensions
18	CBOR_TAG_PERL_OBJECT = 256,	69	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
19	CBOR_TAG_GENERIC_OBJECT = 257,	70	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
		71	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
		72	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
		73	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
		74	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
		75	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
20		76
21	// rfc7049	77	// rfc7049
22	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	78	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
23	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	79	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
24	CBOR_TAG_POS_BIGNUM = 2, // byte string	80	CBOR_TAG_POS_BIGNUM = 2, // byte string
25	CBOR_TAG_NEG_BIGNUM = 3, // byte string	81	CBOR_TAG_NEG_BIGNUM = 3, // byte string
26	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	82	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
27	CBOR_TAG_BIGFLOAT = 5, // array	83	CBOR_TAG_BIGFLOAT = 5, // array
28		84
29	CBOR_TAG_CONV_B64U = 21, // base64url, any	85	CBOR_TAG_CONV_B64U = 21, // base64url, any
30	CBOR_TAG_CONV_B64 = 22, // base64, any	86	CBOR_TAG_CONV_B64 = 22, // base64, any
31	CBOR_TAG_CONV_HEX = 23, // base16, any	87	CBOR_TAG_CONV_HEX = 23, // base16, any
32	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	88	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
33		89
34	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	90	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
35	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	91	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
36	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	92	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
37	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	93	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
38	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	94	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
39		95
40	CBOR_TAG_MAGIC = 55799 // self-describe cbor	96	CBOR_TAG_MAGIC = 55799, // self-describe cbor
41	};	97	};
42		98
43	#define F_SHRINK 0x00000200UL	99	#define F_SHRINK 0x00000001UL
44	#define F_ALLOW_UNKNOWN 0x00002000UL	100	#define F_ALLOW_UNKNOWN 0x00000002UL
		101	#define F_ALLOW_SHARING 0x00000004UL
		102	#define F_ALLOW_CYCLES 0x00000008UL
		103	#define F_PACK_STRINGS 0x00000010UL
		104	#define F_VALIDATE_UTF8 0x00000020UL
45		105
46	#define INIT_SIZE 32 // initial scalar size to be allocated	106	#define INIT_SIZE 32 // initial scalar size to be allocated
47		107
48	#define SB do {	108	#define SB do {
49	#define SE } while (0)	109	#define SE } while (0)
…		…
61	# define CBOR_SLOW 0	121	# define CBOR_SLOW 0
62	# define CBOR_STASH cbor_stash	122	# define CBOR_STASH cbor_stash
63	#endif	123	#endif
64		124
65	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::	125	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
66	static SV *types_true, *types_false, *types_error, *sv_cbor;	126	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
67		127
68	typedef struct {	128	typedef struct {
69	U32 flags;	129	U32 flags;
70	U32 max_depth;	130	U32 max_depth;
71	STRLEN max_size;	131	STRLEN max_size;
		132	SV *filter;
		133
		134	// for the incremental parser
		135	STRLEN incr_pos; // the current offset into the text
		136	STRLEN incr_need; // minimum bytes needed to decode
		137	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
72	} CBOR;	138	} CBOR;
73		139
74	ecb_inline void	140	ecb_inline void
75	cbor_init (CBOR *cbor)	141	cbor_init (CBOR *cbor)
76	{	142	{
77	Zero (cbor, 1, CBOR);	143	Zero (cbor, 1, CBOR);
78	cbor->max_depth = 512;	144	cbor->max_depth = 512;
		145	}
		146
		147	ecb_inline void
		148	cbor_free (CBOR *cbor)
		149	{
		150	SvREFCNT_dec (cbor->filter);
		151	SvREFCNT_dec (cbor->incr_count);
79	}	152	}
80		153
81	/////////////////////////////////////////////////////////////////////////////	154	/////////////////////////////////////////////////////////////////////////////
82	// utility functions	155	// utility functions
83		156
…		…
105	SvPV_renew (sv, SvCUR (sv) + 1);	178	SvPV_renew (sv, SvCUR (sv) + 1);
106	#endif	179	#endif
107	}	180	}
108	}	181	}
109		182
110	/////////////////////////////////////////////////////////////////////////////	183	// minimum length of a string to be registered for stringref
111	// fp hell	184	ecb_inline int
112		185	minimum_string_length (UV idx)
113	//TODO	186	{
		187	return idx > 23
		188	? idx > 0xffU
		189	? idx > 0xffffU
		190	? idx > 0xffffffffU
		191	? 11
		192	: 7
		193	: 5
		194	: 4
		195	: 3;
		196	}
114		197
115	/////////////////////////////////////////////////////////////////////////////	198	/////////////////////////////////////////////////////////////////////////////
116	// encoder	199	// encoder
117		200
118	// structure used for encoding CBOR	201	// structure used for encoding CBOR
…		…
121	char *cur; // SvPVX (sv) + current output position	204	char *cur; // SvPVX (sv) + current output position
122	char *end; // SvEND (sv)	205	char *end; // SvEND (sv)
123	SV *sv; // result scalar	206	SV *sv; // result scalar
124	CBOR cbor;	207	CBOR cbor;
125	U32 depth; // recursion level	208	U32 depth; // recursion level
		209	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		210	UV stringref_idx;
		211	HV *shareable; // ptr => index, or 0
		212	UV shareable_idx;
126	} enc_t;	213	} enc_t;
127		214
128	ecb_inline void	215	ecb_inline void
129	need (enc_t *enc, STRLEN len)	216	need (enc_t *enc, STRLEN len)
130	{	217	{
…		…
147	static void	234	static void
148	encode_uint (enc_t *enc, int major, UV len)	235	encode_uint (enc_t *enc, int major, UV len)
149	{	236	{
150	need (enc, 9);	237	need (enc, 9);
151		238
152	if (len < 24)	239	if (ecb_expect_true (len < LENGTH_EXT1))
153	*enc->cur++ = major | len;	240	*enc->cur++ = major | len;
154	else if (len <= 0xff)	241	else if (ecb_expect_true (len <= 0xffU))
155	{	242	{
156	*enc->cur++ = major | 24;	243	*enc->cur++ = major | LENGTH_EXT1;
157	*enc->cur++ = len;	244	*enc->cur++ = len;
158	}	245	}
159	else if (len <= 0xffff)	246	else if (len <= 0xffffU)
160	{	247	{
161	*enc->cur++ = major | 25;	248	*enc->cur++ = major | LENGTH_EXT2;
162	*enc->cur++ = len >> 8;	249	*enc->cur++ = len >> 8;
163	*enc->cur++ = len;	250	*enc->cur++ = len;
164	}	251	}
165	else if (len <= 0xffffffff)	252	else if (len <= 0xffffffffU)
166	{	253	{
167	*enc->cur++ = major | 26;	254	*enc->cur++ = major | LENGTH_EXT4;
168	*enc->cur++ = len >> 24;	255	*enc->cur++ = len >> 24;
169	*enc->cur++ = len >> 16;	256	*enc->cur++ = len >> 16;
170	*enc->cur++ = len >> 8;	257	*enc->cur++ = len >> 8;
171	*enc->cur++ = len;	258	*enc->cur++ = len;
172	}	259	}
173	else	260	else
174	{	261	{
175	*enc->cur++ = major | 27;	262	*enc->cur++ = major | LENGTH_EXT8;
176	*enc->cur++ = len >> 56;	263	*enc->cur++ = len >> 56;
177	*enc->cur++ = len >> 48;	264	*enc->cur++ = len >> 48;
178	*enc->cur++ = len >> 40;	265	*enc->cur++ = len >> 40;
179	*enc->cur++ = len >> 32;	266	*enc->cur++ = len >> 32;
180	*enc->cur++ = len >> 24;	267	*enc->cur++ = len >> 24;
…		…
182	*enc->cur++ = len >> 8;	269	*enc->cur++ = len >> 8;
183	*enc->cur++ = len;	270	*enc->cur++ = len;
184	}	271	}
185	}	272	}
186		273
187	static void	274	ecb_inline void
		275	encode_tag (enc_t *enc, UV tag)
		276	{
		277	encode_uint (enc, MAJOR_TAG, tag);
		278	}
		279
		280	ecb_inline void
188	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	281	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)
189	{	282	{
190	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	283	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
191	need (enc, len);	284	need (enc, len);
192	memcpy (enc->cur, str, len);	285	memcpy (enc->cur, str, len);
193	enc->cur += len;	286	enc->cur += len;
194	}	287	}
195		288
		289	static void
		290	encode_strref (enc_t *enc, int utf8, char *str, STRLEN len)
		291	{
		292	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		293	{
		294	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		295
		296	if (SvOK (*svp))
		297	{
		298	// already registered, use stringref
		299	encode_tag (enc, CBOR_TAG_STRINGREF);
		300	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		301	return;
		302	}
		303	else if (len >= minimum_string_length (enc->stringref_idx))
		304	{
		305	// register only
		306	sv_setuv (*svp, enc->stringref_idx);
		307	++enc->stringref_idx;
		308	}
		309	}
		310
		311	encode_str (enc, utf8, str, len);
		312	}
		313
196	static void encode_sv (enc_t *enc, SV *sv);	314	static void encode_sv (enc_t *enc, SV *sv);
197		315
198	static void	316	static void
199	encode_av (enc_t *enc, AV *av)	317	encode_av (enc_t *enc, AV *av)
200	{	318	{
…		…
203	if (enc->depth >= enc->cbor.max_depth)	321	if (enc->depth >= enc->cbor.max_depth)
204	croak (ERR_NESTING_EXCEEDED);	322	croak (ERR_NESTING_EXCEEDED);
205		323
206	++enc->depth;	324	++enc->depth;
207		325
208	encode_uint (enc, 0x80, len + 1);	326	encode_uint (enc, MAJOR_ARRAY, len + 1);
209		327
210	for (i = 0; i <= len; ++i)	328	for (i = 0; i <= len; ++i)
211	{	329	{
212	SV **svp = av_fetch (av, i, 0);	330	SV **svp = av_fetch (av, i, 0);
213	encode_sv (enc, svp ? *svp : &PL_sv_undef);	331	encode_sv (enc, svp ? *svp : &PL_sv_undef);
…		…
228		346
229	int pairs = hv_iterinit (hv);	347	int pairs = hv_iterinit (hv);
230	int mg = SvMAGICAL (hv);	348	int mg = SvMAGICAL (hv);
231		349
232	if (mg)	350	if (mg)
233	encode_ch (enc, 0xa0 | 31);	351	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
234	else	352	else
235	encode_uint (enc, 0xa0, pairs);	353	encode_uint (enc, MAJOR_MAP, pairs);
236		354
237	while ((he = hv_iternext (hv)))	355	while ((he = hv_iternext (hv)))
238	{	356	{
239	if (HeKLEN (he) == HEf_SVKEY)	357	if (HeKLEN (he) == HEf_SVKEY)
240	encode_sv (enc, HeSVKEY (he));	358	encode_sv (enc, HeSVKEY (he));
241	else	359	else
242	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	360	encode_strref (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));
243		361
244	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	362	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
245	}	363	}
246		364
247	if (mg)	365	if (mg)
248	encode_ch (enc, 0xe0 | 31);	366	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
249		367
250	--enc->depth;	368	--enc->depth;
251	}	369	}
252		370
253	// encode objects, arrays and special \0=false and \1=true values.	371	// encode objects, arrays and special \0=false and \1=true values.
254	static void	372	static void
255	encode_rv (enc_t *enc, SV *sv)	373	encode_rv (enc_t *enc, SV *sv)
256	{	374	{
257	svtype svt;
258
259	SvGETMAGIC (sv);	375	SvGETMAGIC (sv);
		376
260	svt = SvTYPE (sv);	377	svtype svt = SvTYPE (sv);
261		378
262	if (ecb_expect_false (SvOBJECT (sv)))	379	if (ecb_expect_false (SvOBJECT (sv)))
263	{	380	{
264	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash	381	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
265	? types_boolean_stash	382	? types_boolean_stash
…		…
270	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	387	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
271	? cbor_tagged_stash	388	? cbor_tagged_stash
272	: gv_stashpv ("CBOR::XS::Tagged" , 1);	389	: gv_stashpv ("CBOR::XS::Tagged" , 1);
273		390
274	HV *stash = SvSTASH (sv);	391	HV *stash = SvSTASH (sv);
275	GV *method;
276		392
277	if (stash == boolean_stash)	393	if (stash == boolean_stash)
278	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	394	{
		395	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		396	return;
		397	}
279	else if (stash == error_stash)	398	else if (stash == error_stash)
280	encode_ch (enc, 0xe0 | 23);	399	{
		400	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		401	return;
		402	}
281	else if (stash == tagged_stash)	403	else if (stash == tagged_stash)
282	{	404	{
283	if (svt != SVt_PVAV)	405	if (svt != SVt_PVAV)
284	croak ("encountered CBOR::XS::Tagged object that isn't an array");	406	croak ("encountered CBOR::XS::Tagged object that isn't an array");
285		407
286	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	408	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
287	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));	409	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		410
		411	return;
		412	}
		413	}
		414
		415	if (ecb_expect_false (SvREFCNT (sv) > 1)
		416	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		417	{
		418	if (!enc->shareable)
		419	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		420
		421	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		422
		423	if (SvOK (*svp))
288	}	424	{
		425	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		426	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		427	return;
		428	}
		429	else
		430	{
		431	sv_setuv (*svp, enc->shareable_idx);
		432	++enc->shareable_idx;
		433	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		434	}
		435	}
		436
		437	if (ecb_expect_false (SvOBJECT (sv)))
		438	{
		439	HV *stash = SvSTASH (sv);
		440	GV *method;
		441
289	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))	442	if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
290	{	443	{
291	dSP;	444	dSP;
292		445
293	ENTER; SAVETMPS; PUSHMARK (SP);	446	ENTER; SAVETMPS; PUSHMARK (SP);
294	// we re-bless the reference to get overload and other niceties right	447	// we re-bless the reference to get overload and other niceties right
…		…
325		478
326	// catch this surprisingly common error	479	// catch this surprisingly common error
327	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)	480	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
328	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));	481	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
329		482
330	encode_uint (enc, 0xc0, CBOR_TAG_PERL_OBJECT);	483	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
331	encode_uint (enc, 0x80, count + 1);	484	encode_uint (enc, MAJOR_ARRAY, count + 1);
332	encode_str (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));	485	encode_strref (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
333		486
334	while (count)	487	while (count)
335	encode_sv (enc, SP[1 - count--]);	488	encode_sv (enc, SP[1 - count--]);
336		489
337	PUTBACK;	490	PUTBACK;
…		…
344	}	497	}
345	else if (svt == SVt_PVHV)	498	else if (svt == SVt_PVHV)
346	encode_hv (enc, (HV *)sv);	499	encode_hv (enc, (HV *)sv);
347	else if (svt == SVt_PVAV)	500	else if (svt == SVt_PVAV)
348	encode_av (enc, (AV *)sv);	501	encode_av (enc, (AV *)sv);
349	else if (svt < SVt_PVAV)
350	{
351	STRLEN len = 0;
352	char *pv = svt ? SvPV (sv, len) : 0;
353
354	if (len == 1 && *pv == '1')
355	encode_ch (enc, 0xe0 | 21);
356	else if (len == 1 && *pv == '0')
357	encode_ch (enc, 0xe0 | 20);
358	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
359	encode_ch (enc, 0xe0 | 23);
360	else
361	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
362	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
363	}
364	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
365	encode_ch (enc, 0xe0 | 23);
366	else	502	else
367	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	503	{
368	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	504	encode_tag (enc, CBOR_TAG_INDIRECTION);
		505	encode_sv (enc, sv);
		506	}
369	}	507	}
370		508
371	static void	509	static void
372	encode_nv (enc_t *enc, SV *sv)	510	encode_nv (enc_t *enc, SV *sv)
373	{	511	{
374	double nv = SvNVX (sv);	512	double nv = SvNVX (sv);
375		513
376	need (enc, 9);	514	need (enc, 9);
377		515
378	if (ecb_expect_false (nv == (U32)nv))	516	if (ecb_expect_false (nv == (NV)(U32)nv))
379	encode_uint (enc, 0x00, (U32)nv);	517	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
380	//TODO: maybe I32?	518	//TODO: maybe I32?
381	else if (ecb_expect_false (nv == (float)nv))	519	else if (ecb_expect_false (nv == (float)nv))
382	{	520	{
383	uint32_t fp = ecb_float_to_binary32 (nv);	521	uint32_t fp = ecb_float_to_binary32 (nv);
384		522
385	*enc->cur++ = 0xe0 | 26;	523	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
386		524
387	if (!ecb_big_endian ())	525	if (!ecb_big_endian ())
388	fp = ecb_bswap32 (fp);	526	fp = ecb_bswap32 (fp);
389		527
390	memcpy (enc->cur, &fp, 4);	528	memcpy (enc->cur, &fp, 4);
…		…
392	}	530	}
393	else	531	else
394	{	532	{
395	uint64_t fp = ecb_double_to_binary64 (nv);	533	uint64_t fp = ecb_double_to_binary64 (nv);
396		534
397	*enc->cur++ = 0xe0 | 27;	535	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
398		536
399	if (!ecb_big_endian ())	537	if (!ecb_big_endian ())
400	fp = ecb_bswap64 (fp);	538	fp = ecb_bswap64 (fp);
401		539
402	memcpy (enc->cur, &fp, 8);	540	memcpy (enc->cur, &fp, 8);
…		…
411		549
412	if (SvPOKp (sv))	550	if (SvPOKp (sv))
413	{	551	{
414	STRLEN len;	552	STRLEN len;
415	char *str = SvPV (sv, len);	553	char *str = SvPV (sv, len);
416	encode_str (enc, SvUTF8 (sv), str, len);	554	encode_strref (enc, SvUTF8 (sv), str, len);
417	}	555	}
418	else if (SvNOKp (sv))	556	else if (SvNOKp (sv))
419	encode_nv (enc, sv);	557	encode_nv (enc, sv);
420	else if (SvIOKp (sv))	558	else if (SvIOKp (sv))
421	{	559	{
422	if (SvIsUV (sv))	560	if (SvIsUV (sv))
423	encode_uint (enc, 0x00, SvUVX (sv));	561	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
424	else if (SvIVX (sv) >= 0)	562	else if (SvIVX (sv) >= 0)
425	encode_uint (enc, 0x00, SvIVX (sv));	563	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
426	else	564	else
427	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	565	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
428	}	566	}
429	else if (SvROK (sv))	567	else if (SvROK (sv))
430	encode_rv (enc, SvRV (sv));	568	encode_rv (enc, SvRV (sv));
431	else if (!SvOK (sv))	569	else if (!SvOK (sv))
432	encode_ch (enc, 0xe0 | 22);	570	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
433	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	571	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
434	encode_ch (enc, 0xe0 | 23);	572	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
435	else	573	else
436	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	574	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
437	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	575	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
438	}	576	}
439		577
440	static SV *	578	static SV *
441	encode_cbor (SV *scalar, CBOR *cbor)	579	encode_cbor (SV *scalar, CBOR *cbor)
442	{	580	{
443	enc_t enc;	581	enc_t enc = { };
444		582
445	enc.cbor = *cbor;	583	enc.cbor = *cbor;
446	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	584	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
447	enc.cur = SvPVX (enc.sv);	585	enc.cur = SvPVX (enc.sv);
448	enc.end = SvEND (enc.sv);	586	enc.end = SvEND (enc.sv);
449	enc.depth = 0;
450		587
451	SvPOK_only (enc.sv);	588	SvPOK_only (enc.sv);
		589
		590	if (cbor->flags & F_PACK_STRINGS)
		591	{
		592	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		593	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		594	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		595	}
		596
452	encode_sv (&enc, scalar);	597	encode_sv (&enc, scalar);
453		598
454	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	599	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
455	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	600	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
456		601
…		…
470	U8 *end; // end of input string	615	U8 *end; // end of input string
471	const char *err; // parse error, if != 0	616	const char *err; // parse error, if != 0
472	CBOR cbor;	617	CBOR cbor;
473	U32 depth; // recursion depth	618	U32 depth; // recursion depth
474	U32 maxdepth; // recursion depth limit	619	U32 maxdepth; // recursion depth limit
		620	AV *shareable;
		621	AV *stringref;
		622	SV *decode_tagged;
475	} dec_t;	623	} dec_t;
476		624
477	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	625	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE
478		626
479	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	627	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")
…		…
482	#define DEC_DEC_DEPTH --dec->depth	630	#define DEC_DEC_DEPTH --dec->depth
483		631
484	static UV	632	static UV
485	decode_uint (dec_t *dec)	633	decode_uint (dec_t *dec)
486	{	634	{
487	switch (*dec->cur & 31)	635	U8 m = *dec->cur & MINOR_MASK;
488	{	636	++dec->cur;
489	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
490	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
491	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
492	return *dec->cur++ & 31;
493		637
494	case 24:	638	if (ecb_expect_true (m < LENGTH_EXT1))
		639	return m;
		640	else if (ecb_expect_true (m == LENGTH_EXT1))
		641	{
495	WANT (2);	642	WANT (1);
496	dec->cur += 2;	643	dec->cur += 1;
497	return dec->cur[-1];	644	return dec->cur[-1];
498		645	}
499	case 25:	646	else if (ecb_expect_true (m == LENGTH_EXT2))
		647	{
500	WANT (3);	648	WANT (2);
501	dec->cur += 3;	649	dec->cur += 2;
502	return (((UV)dec->cur[-2]) << 8)	650	return (((UV)dec->cur[-2]) << 8)
503	| ((UV)dec->cur[-1]);	651	| ((UV)dec->cur[-1]);
504		652	}
505	case 26:	653	else if (ecb_expect_true (m == LENGTH_EXT4))
		654	{
506	WANT (5);	655	WANT (4);
507	dec->cur += 5;	656	dec->cur += 4;
508	return (((UV)dec->cur[-4]) << 24)	657	return (((UV)dec->cur[-4]) << 24)
509	| (((UV)dec->cur[-3]) << 16)	658	| (((UV)dec->cur[-3]) << 16)
510	| (((UV)dec->cur[-2]) << 8)	659	| (((UV)dec->cur[-2]) << 8)
511	| ((UV)dec->cur[-1]);	660	| ((UV)dec->cur[-1]);
512		661	}
513	case 27:	662	else if (ecb_expect_true (m == LENGTH_EXT8))
		663	{
514	WANT (9);	664	WANT (8);
515	dec->cur += 9;	665	dec->cur += 8;
		666
		667	return
		668	#if UVSIZE < 8
		669	0
		670	#else
516	return (((UV)dec->cur[-8]) << 56)	671	(((UV)dec->cur[-8]) << 56)
517	| (((UV)dec->cur[-7]) << 48)	672	| (((UV)dec->cur[-7]) << 48)
518	| (((UV)dec->cur[-6]) << 40)	673	| (((UV)dec->cur[-6]) << 40)
519	| (((UV)dec->cur[-5]) << 32)	674	| (((UV)dec->cur[-5]) << 32)
		675	#endif
520	| (((UV)dec->cur[-4]) << 24)	676	| (((UV)dec->cur[-4]) << 24)
521	| (((UV)dec->cur[-3]) << 16)	677	| (((UV)dec->cur[-3]) << 16)
522	| (((UV)dec->cur[-2]) << 8)	678	| (((UV)dec->cur[-2]) << 8)
523	| ((UV)dec->cur[-1]);	679	| ((UV)dec->cur[-1]);
524		680	}
525	default:	681	else
526	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	682	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
527	}
528		683
529	fail:	684	fail:
530	return 0;	685	return 0;
531	}	686	}
532		687
…		…
537	{	692	{
538	AV *av = newAV ();	693	AV *av = newAV ();
539		694
540	DEC_INC_DEPTH;	695	DEC_INC_DEPTH;
541		696
542	if ((*dec->cur & 31) == 31)	697	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
543	{	698	{
544	++dec->cur;	699	++dec->cur;
545		700
546	for (;;)	701	for (;;)
547	{	702	{
548	WANT (1);	703	WANT (1);
549		704
550	if (*dec->cur == (0xe0 | 31))	705	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
551	{	706	{
552	++dec->cur;	707	++dec->cur;
553	break;	708	break;
554	}	709	}
555		710
…		…
558	}	713	}
559	else	714	else
560	{	715	{
561	int i, len = decode_uint (dec);	716	int i, len = decode_uint (dec);
562		717
		718	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
563	av_fill (av, len - 1);	719	av_fill (av, len - 1);
564		720
565	for (i = 0; i < len; ++i)	721	for (i = 0; i < len; ++i)
566	AvARRAY (av)[i] = decode_sv (dec);	722	AvARRAY (av)[i] = decode_sv (dec);
567	}	723	}
…		…
573	SvREFCNT_dec (av);	729	SvREFCNT_dec (av);
574	DEC_DEC_DEPTH;	730	DEC_DEC_DEPTH;
575	return &PL_sv_undef;	731	return &PL_sv_undef;
576	}	732	}
577		733
		734	static void
		735	decode_he (dec_t *dec, HV *hv)
		736	{
		737	// for speed reasons, we specialcase single-string
		738	// byte or utf-8 strings as keys, but only when !stringref
		739
		740	if (ecb_expect_true (!dec->stringref))
		741	if (ecb_expect_true ((*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		742	{
		743	I32 len = decode_uint (dec);
		744	char *key = (char *)dec->cur;
		745
		746	dec->cur += len;
		747
		748	hv_store (hv, key, len, decode_sv (dec), 0);
		749
		750	return;
		751	}
		752	else if (ecb_expect_true ((*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		753	{
		754	I32 len = decode_uint (dec);
		755	char *key = (char *)dec->cur;
		756
		757	dec->cur += len;
		758
		759	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		760	if (!is_utf8_string (key, len))
		761	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		762
		763	hv_store (hv, key, -len, decode_sv (dec), 0);
		764
		765	return;
		766	}
		767
		768	SV *k = decode_sv (dec);
		769	SV *v = decode_sv (dec);
		770
		771	hv_store_ent (hv, k, v, 0);
		772	SvREFCNT_dec (k);
		773
		774	fail:
		775	;
		776	}
		777
578	static SV *	778	static SV *
579	decode_hv (dec_t *dec)	779	decode_hv (dec_t *dec)
580	{	780	{
581	HV *hv = newHV ();	781	HV *hv = newHV ();
582		782
583	DEC_INC_DEPTH;	783	DEC_INC_DEPTH;
584		784
585	if ((*dec->cur & 31) == 31)	785	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
586	{	786	{
587	++dec->cur;	787	++dec->cur;
588		788
589	for (;;)	789	for (;;)
590	{	790	{
591	WANT (1);	791	WANT (1);
592		792
593	if (*dec->cur == (0xe0 | 31))	793	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
594	{	794	{
595	++dec->cur;	795	++dec->cur;
596	break;	796	break;
597	}	797	}
598		798
599	SV *k = decode_sv (dec);	799	decode_he (dec, hv);
600	SV *v = decode_sv (dec);
601
602	hv_store_ent (hv, k, v, 0);
603	SvREFCNT_dec (k);
604	}	800	}
605	}	801	}
606	else	802	else
607	{	803	{
608	int len = decode_uint (dec);	804	int pairs = decode_uint (dec);
609		805
610	while (len--)	806	while (pairs--)
611	{	807	decode_he (dec, hv);
612	SV *k = decode_sv (dec);
613	SV *v = decode_sv (dec);
614
615	hv_store_ent (hv, k, v, 0);
616	SvREFCNT_dec (k);
617	}
618	}	808	}
619		809
620	DEC_DEC_DEPTH;	810	DEC_DEC_DEPTH;
621	return newRV_noinc ((SV *)hv);	811	return newRV_noinc ((SV *)hv);
622		812
…		…
629	static SV *	819	static SV *
630	decode_str (dec_t *dec, int utf8)	820	decode_str (dec_t *dec, int utf8)
631	{	821	{
632	SV *sv = 0;	822	SV *sv = 0;
633		823
634	if ((*dec->cur & 31) == 31)	824	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
635	{	825	{
		826	// indefinite length strings
636	++dec->cur;	827	++dec->cur;
637		828
		829	U8 major = *dec->cur & MAJOR_MISC;
		830
638	sv = newSVpvn ("", 0);	831	sv = newSVpvn ("", 0);
639		832
640	// not very fast, and certainly not robust against illegal input
641	for (;;)	833	for (;;)
642	{	834	{
643	WANT (1);	835	WANT (1);
644		836
645	if (*dec->cur == (0xe0 | 31))	837	if ((*dec->cur - major) > LENGTH_EXT8)
		838	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
646	{	839	{
647	++dec->cur;	840	++dec->cur;
648	break;	841	break;
649	}	842	}
		843	else
		844	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
650		845
651	sv_catsv (sv, decode_sv (dec));	846	STRLEN len = decode_uint (dec);
		847
		848	WANT (len);
		849	sv_catpvn (sv, dec->cur, len);
		850	dec->cur += len;
652	}	851	}
653	}	852	}
654	else	853	else
655	{	854	{
656	STRLEN len = decode_uint (dec);	855	STRLEN len = decode_uint (dec);
657		856
658	WANT (len);	857	WANT (len);
659	sv = newSVpvn (dec->cur, len);	858	sv = newSVpvn (dec->cur, len);
660	dec->cur += len;	859	dec->cur += len;
		860
		861	if (ecb_expect_false (dec->stringref)
		862	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		863	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
661	}	864	}
662		865
663	if (utf8)	866	if (utf8)
		867	{
		868	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		869	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		870	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		871
664	SvUTF8_on (sv);	872	SvUTF8_on (sv);
		873	}
665		874
666	return sv;	875	return sv;
667		876
668	fail:	877	fail:
669	SvREFCNT_dec (sv);	878	SvREFCNT_dec (sv);
…		…
671	}	880	}
672		881
673	static SV *	882	static SV *
674	decode_tagged (dec_t *dec)	883	decode_tagged (dec_t *dec)
675	{	884	{
		885	SV *sv = 0;
676	UV tag = decode_uint (dec);	886	UV tag = decode_uint (dec);
		887
		888	WANT (1);
		889
		890	switch (tag)
		891	{
		892	case CBOR_TAG_MAGIC:
677	SV *sv = decode_sv (dec);	893	sv = decode_sv (dec);
		894	break;
678		895
679	if (tag == CBOR_TAG_MAGIC)	896	case CBOR_TAG_INDIRECTION:
680	return sv;	897	sv = newRV_noinc (decode_sv (dec));
681	else if (tag == CBOR_TAG_PERL_OBJECT)	898	break;
682	{	899
		900	case CBOR_TAG_STRINGREF_NAMESPACE:
		901	{
		902	ENTER; SAVETMPS;
		903
		904	SAVESPTR (dec->stringref);
		905	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		906
		907	sv = decode_sv (dec);
		908
		909	FREETMPS; LEAVE;
		910	}
		911	break;
		912
		913	case CBOR_TAG_STRINGREF:
		914	{
		915	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		916	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		917
		918	UV idx = decode_uint (dec);
		919
		920	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		921	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		922
		923	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		924	}
		925	break;
		926
		927	case CBOR_TAG_VALUE_SHAREABLE:
		928	{
		929	if (ecb_expect_false (!dec->shareable))
		930	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		931
		932	if (dec->cbor.flags & F_ALLOW_CYCLES)
		933	{
		934	sv = newSV (0);
		935	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		936
		937	SV *osv = decode_sv (dec);
		938	sv_setsv (sv, osv);
		939	SvREFCNT_dec_NN (osv);
		940	}
		941	else
		942	{
		943	av_push (dec->shareable, &PL_sv_undef);
		944	int idx = AvFILLp (dec->shareable);
		945	sv = decode_sv (dec);
		946	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		947	}
		948	}
		949	break;
		950
		951	case CBOR_TAG_VALUE_SHAREDREF:
		952	{
		953	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		954	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		955
		956	UV idx = decode_uint (dec);
		957
		958	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		959	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		960
		961	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		962
		963	if (sv == &PL_sv_undef)
		964	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		965	}
		966	break;
		967
		968	case CBOR_TAG_PERL_OBJECT:
		969	{
		970	sv = decode_sv (dec);
		971
683	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)	972	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
684	ERR ("corrupted CBOR data (non-array perl object)");	973	ERR ("corrupted CBOR data (non-array perl object)");
685		974
686	AV *av = (AV *)SvRV (sv);	975	AV *av = (AV *)SvRV (sv);
687	int len = av_len (av) + 1;	976	int len = av_len (av) + 1;
688	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);	977	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
689		978
690	if (!stash)	979	if (!stash)
691	ERR ("cannot decode perl-object (package does not exist)");	980	ERR ("cannot decode perl-object (package does not exist)");
692		981
693	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);	982	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
694		983
695	if (!method)	984	if (!method)
696	ERR ("cannot decode perl-object (package does not have a THAW method)");	985	ERR ("cannot decode perl-object (package does not have a THAW method)");
697		986
698	dSP;	987	dSP;
699		988
700	ENTER; SAVETMPS; PUSHMARK (SP);	989	ENTER; SAVETMPS; PUSHMARK (SP);
701	EXTEND (SP, len + 1);	990	EXTEND (SP, len + 1);
702	// we re-bless the reference to get overload and other niceties right	991	// we re-bless the reference to get overload and other niceties right
703	PUSHs (*av_fetch (av, 0, 1));	992	PUSHs (*av_fetch (av, 0, 1));
704	PUSHs (sv_cbor);	993	PUSHs (sv_cbor);
705		994
706	int i;	995	int i;
707		996
708	for (i = 1; i < len; ++i)	997	for (i = 1; i < len; ++i)
709	PUSHs (*av_fetch (av, i, 1));	998	PUSHs (*av_fetch (av, i, 1));
710		999
711	PUTBACK;	1000	PUTBACK;
712	call_sv ((SV *)GvCV (method), G_SCALAR);	1001	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
713	SPAGAIN;	1002	SPAGAIN;
714		1003
		1004	if (SvTRUE (ERRSV))
		1005	{
		1006	FREETMPS; LEAVE;
		1007	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1008	}
		1009
		1010	SvREFCNT_dec (sv);
715	sv = SvREFCNT_inc (POPs);	1011	sv = SvREFCNT_inc (POPs);
716		1012
717	PUTBACK;	1013	PUTBACK;
718		1014
719	FREETMPS; LEAVE;	1015	FREETMPS; LEAVE;
		1016	}
		1017	break;
720		1018
721	return sv;	1019	default:
722	}	1020	{
723	else	1021	sv = decode_sv (dec);
724	{	1022
		1023	dSP;
		1024	ENTER; SAVETMPS; PUSHMARK (SP);
		1025	EXTEND (SP, 2);
		1026	PUSHs (newSVuv (tag));
		1027	PUSHs (sv);
		1028
		1029	PUTBACK;
		1030	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1031	SPAGAIN;
		1032
		1033	if (SvTRUE (ERRSV))
		1034	{
		1035	FREETMPS; LEAVE;
		1036	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1037	}
		1038
		1039	if (count)
		1040	{
		1041	SvREFCNT_dec (sv);
		1042	sv = SvREFCNT_inc (POPs);
		1043	}
		1044	else
		1045	{
725	AV *av = newAV ();	1046	AV *av = newAV ();
726	av_push (av, newSVuv (tag));	1047	av_push (av, newSVuv (tag));
727	av_push (av, sv);	1048	av_push (av, sv);
728		1049
729	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	1050	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
730	? cbor_tagged_stash	1051	? cbor_tagged_stash
731	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1052	: gv_stashpv ("CBOR::XS::Tagged" , 1);
732
733	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);	1053	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1054	}
		1055
		1056	PUTBACK;
		1057
		1058	FREETMPS; LEAVE;
		1059	}
		1060	break;
734	}	1061	}
		1062
		1063	return sv;
735		1064
736	fail:	1065	fail:
737	SvREFCNT_dec (sv);	1066	SvREFCNT_dec (sv);
738	return &PL_sv_undef;	1067	return &PL_sv_undef;
739	}	1068	}
…		…
741	static SV *	1070	static SV *
742	decode_sv (dec_t *dec)	1071	decode_sv (dec_t *dec)
743	{	1072	{
744	WANT (1);	1073	WANT (1);
745		1074
746	switch (*dec->cur >> 5)	1075	switch (*dec->cur >> MAJOR_SHIFT)
747	{	1076	{
748	case 0: // unsigned int	1077	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
749	return newSVuv (decode_uint (dec));	1078	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
750	case 1: // negative int	1079	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
751	return newSViv (-1 - (IV)decode_uint (dec));	1080	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
752	case 2: // octet string	1081	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
753	return decode_str (dec, 0);	1082	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
754	case 3: // utf-8 string	1083	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
755	return decode_str (dec, 1);	1084
756	case 4: // array	1085	case MAJOR_MISC >> MAJOR_SHIFT:
757	return decode_av (dec);
758	case 5: // map
759	return decode_hv (dec);
760	case 6: // tag
761	return decode_tagged (dec);
762	case 7: // misc
763	switch (*dec->cur++ & 31)	1086	switch (*dec->cur++ & MINOR_MASK)
764	{	1087	{
765	case 20:	1088	case SIMPLE_FALSE:
766	#if CBOR_SLOW	1089	#if CBOR_SLOW
767	types_false = get_bool ("Types::Serialiser::false");	1090	types_false = get_bool ("Types::Serialiser::false");
768	#endif	1091	#endif
769	return newSVsv (types_false);	1092	return newSVsv (types_false);
770	case 21:	1093	case SIMPLE_TRUE:
771	#if CBOR_SLOW	1094	#if CBOR_SLOW
772	types_true = get_bool ("Types::Serialiser::true");	1095	types_true = get_bool ("Types::Serialiser::true");
773	#endif	1096	#endif
774	return newSVsv (types_true);	1097	return newSVsv (types_true);
775	case 22:	1098	case SIMPLE_NULL:
776	return newSVsv (&PL_sv_undef);	1099	return newSVsv (&PL_sv_undef);
777	case 23:	1100	case SIMPLE_UNDEF:
778	#if CBOR_SLOW	1101	#if CBOR_SLOW
779	types_error = get_bool ("Types::Serialiser::error");	1102	types_error = get_bool ("Types::Serialiser::error");
780	#endif	1103	#endif
781	return newSVsv (types_error);	1104	return newSVsv (types_error);
782		1105
783	case 25:	1106	case MISC_FLOAT16:
784	{	1107	{
785	WANT (2);	1108	WANT (2);
786		1109
787	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1110	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
788	dec->cur += 2;	1111	dec->cur += 2;
789		1112
790	return newSVnv (ecb_binary16_to_float (fp));	1113	return newSVnv (ecb_binary16_to_float (fp));
791	}	1114	}
792		1115
793	case 26:	1116	case MISC_FLOAT32:
794	{	1117	{
795	uint32_t fp;	1118	uint32_t fp;
796	WANT (4);	1119	WANT (4);
797	memcpy (&fp, dec->cur, 4);	1120	memcpy (&fp, dec->cur, 4);
798	dec->cur += 4;	1121	dec->cur += 4;
…		…
801	fp = ecb_bswap32 (fp);	1124	fp = ecb_bswap32 (fp);
802		1125
803	return newSVnv (ecb_binary32_to_float (fp));	1126	return newSVnv (ecb_binary32_to_float (fp));
804	}	1127	}
805		1128
806	case 27:	1129	case MISC_FLOAT64:
807	{	1130	{
808	uint64_t fp;	1131	uint64_t fp;
809	WANT (8);	1132	WANT (8);
810	memcpy (&fp, dec->cur, 8);	1133	memcpy (&fp, dec->cur, 8);
811	dec->cur += 8;	1134	dec->cur += 8;
…		…
814	fp = ecb_bswap64 (fp);	1137	fp = ecb_bswap64 (fp);
815		1138
816	return newSVnv (ecb_binary64_to_double (fp));	1139	return newSVnv (ecb_binary64_to_double (fp));
817	}	1140	}
818		1141
819	// 0..19 unassigned	1142	// 0..19 unassigned simple
820	// 24 reserved + unassigned (reserved values are not encodable)	1143	// 24 reserved + unassigned simple (reserved values are not encodable)
		1144	// 28-30 unassigned misc
		1145	// 31 break code
821	default:	1146	default:
822	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1147	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
823	}	1148	}
824		1149
825	break;	1150	break;
826	}	1151	}
827		1152
…		…
830	}	1155	}
831		1156
832	static SV *	1157	static SV *
833	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1158	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
834	{	1159	{
835	dec_t dec;	1160	dec_t dec = { };
836	SV *sv;	1161	SV *sv;
		1162	STRLEN len;
		1163	char *data = SvPVbyte (string, len);
837		1164
838	/* work around bugs in 5.10 where manipulating magic values
839	* makes perl ignore the magic in subsequent accesses.
840	* also make a copy of non-PV values, to get them into a clean
841	* state (SvPV should do that, but it's buggy, see below).
842	*/
843	/*SvGETMAGIC (string);*/
844	if (SvMAGICAL (string) || !SvPOK (string))
845	string = sv_2mortal (newSVsv (string));
846
847	SvUPGRADE (string, SVt_PV);
848
849	/* work around a bug in perl 5.10, which causes SvCUR to fail an
850	* assertion with -DDEBUGGING, although SvCUR is documented to
851	* return the xpv_cur field which certainly exists after upgrading.
852	* according to nicholas clark, calling SvPOK fixes this.
853	* But it doesn't fix it, so try another workaround, call SvPV_nolen
854	* and hope for the best.
855	* Damnit, SvPV_nolen still trips over yet another assertion. This
856	* assertion business is seriously broken, try yet another workaround
857	* for the broken -DDEBUGGING.
858	*/
859	{
860	#ifdef DEBUGGING
861	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
862	#else
863	STRLEN offset = SvCUR (string);
864	#endif
865
866	if (offset > cbor->max_size && cbor->max_size)	1165	if (len > cbor->max_size && cbor->max_size)
867	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1166	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
868	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1167	(unsigned long)len, (unsigned long)cbor->max_size);
869	}
870
871	sv_utf8_downgrade (string, 0);
872		1168
873	dec.cbor = *cbor;	1169	dec.cbor = *cbor;
874	dec.cur = (U8 *)SvPVX (string);	1170	dec.cur = (U8 *)data;
875	dec.end = (U8 *)SvEND (string);	1171	dec.end = (U8 *)data + len;
876	dec.err = 0;
877	dec.depth = 0;
878		1172
879	sv = decode_sv (&dec);	1173	sv = decode_sv (&dec);
880		1174
881	if (offset_return)	1175	if (offset_return)
882	*offset_return = dec.cur;	1176	*offset_return = dec.cur;
…		…
885	if (dec.cur != dec.end && !dec.err)	1179	if (dec.cur != dec.end && !dec.err)
886	dec.err = "garbage after CBOR object";	1180	dec.err = "garbage after CBOR object";
887		1181
888	if (dec.err)	1182	if (dec.err)
889	{	1183	{
		1184	if (dec.shareable)
		1185	{
		1186	// need to break cyclic links, which whould all be in shareable
		1187	int i;
		1188	SV **svp;
		1189
		1190	for (i = av_len (dec.shareable) + 1; i--; )
		1191	if ((svp = av_fetch (dec.shareable, i, 0)))
		1192	sv_setsv (*svp, &PL_sv_undef);
		1193	}
		1194
890	SvREFCNT_dec (sv);	1195	SvREFCNT_dec (sv);
891	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1196	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
892	}	1197	}
893		1198
894	sv = sv_2mortal (sv);	1199	sv = sv_2mortal (sv);
895		1200
896	return sv;	1201	return sv;
897	}	1202	}
898		1203
		1204	/////////////////////////////////////////////////////////////////////////////
		1205	// incremental parser
		1206
		1207	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1208
		1209	// returns 0 for notyet, 1 for success or error
		1210	static int
		1211	incr_parse (CBOR *self, SV *cborstr)
		1212	{
		1213	STRLEN cur;
		1214	SvPV (cborstr, cur);
		1215
		1216	while (ecb_expect_true (self->incr_need <= cur))
		1217	{
		1218	// table of integer count bytes
		1219	static I8 incr_len[MINOR_MASK + 1] = {
		1220	0, 0, 0, 0, 0, 0, 0, 0,
		1221	0, 0, 0, 0, 0, 0, 0, 0,
		1222	0, 0, 0, 0, 0, 0, 0, 0,
		1223	1, 2, 4, 8,-1,-1,-1,-2
		1224	};
		1225
		1226	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1227	U8 m = *p & MINOR_MASK;
		1228	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1229	I8 ilen = incr_len[m];
		1230
		1231	self->incr_need = self->incr_pos + 1;
		1232
		1233	if (ecb_expect_false (ilen < 0))
		1234	{
		1235	if (m != MINOR_INDEF)
		1236	return 1; // error
		1237
		1238	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1239	{
		1240	if (count >= 0)
		1241	return 1; // error
		1242
		1243	count = 1;
		1244	}
		1245	else
		1246	{
		1247	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1248	count = -1;
		1249	}
		1250	}
		1251	else
		1252	{
		1253	self->incr_need += ilen;
		1254	if (ecb_expect_false (self->incr_need > cur))
		1255	return 0;
		1256
		1257	int major = *p >> MAJOR_SHIFT;
		1258
		1259	switch (major)
		1260	{
		1261	case MAJOR_BYTES >> MAJOR_SHIFT:
		1262	case MAJOR_TEXT >> MAJOR_SHIFT:
		1263	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1264	case MAJOR_MAP >> MAJOR_SHIFT:
		1265	{
		1266	UV len;
		1267
		1268	if (ecb_expect_false (ilen))
		1269	{
		1270	len = 0;
		1271
		1272	do {
		1273	len = (len << 8) | *++p;
		1274	} while (--ilen);
		1275	}
		1276	else
		1277	len = m;
		1278
		1279	switch (major)
		1280	{
		1281	case MAJOR_BYTES >> MAJOR_SHIFT:
		1282	case MAJOR_TEXT >> MAJOR_SHIFT:
		1283	self->incr_need += len;
		1284	if (ecb_expect_false (self->incr_need > cur))
		1285	return 0;
		1286
		1287	break;
		1288
		1289	case MAJOR_MAP >> MAJOR_SHIFT:
		1290	len <<= 1;
		1291	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1292	if (len)
		1293	{
		1294	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1295	count = len + 1;
		1296	}
		1297	break;
		1298	}
		1299	}
		1300	}
		1301	}
		1302
		1303	self->incr_pos = self->incr_need;
		1304
		1305	if (count > 0)
		1306	{
		1307	while (!--count)
		1308	{
		1309	if (!AvFILLp (self->incr_count))
		1310	return 1; // done
		1311
		1312	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1313	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1314	}
		1315
		1316	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1317	}
		1318	}
		1319
		1320	return 0;
		1321	}
		1322
		1323
899	/////////////////////////////////////////////////////////////////////////////	1324	/////////////////////////////////////////////////////////////////////////////
900	// XS interface functions	1325	// XS interface functions
901		1326
902	MODULE = CBOR::XS PACKAGE = CBOR::XS	1327	MODULE = CBOR::XS PACKAGE = CBOR::XS
903		1328
…		…
910	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);	1335	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
911		1336
912	types_true = get_bool ("Types::Serialiser::true" );	1337	types_true = get_bool ("Types::Serialiser::true" );
913	types_false = get_bool ("Types::Serialiser::false");	1338	types_false = get_bool ("Types::Serialiser::false");
914	types_error = get_bool ("Types::Serialiser::error");	1339	types_error = get_bool ("Types::Serialiser::error");
		1340
		1341	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
915		1342
916	sv_cbor = newSVpv ("CBOR", 0);	1343	sv_cbor = newSVpv ("CBOR", 0);
917	SvREADONLY_on (sv_cbor);	1344	SvREADONLY_on (sv_cbor);
918	}	1345	}
919		1346
…		…
940		1367
941	void shrink (CBOR *self, int enable = 1)	1368	void shrink (CBOR *self, int enable = 1)
942	ALIAS:	1369	ALIAS:
943	shrink = F_SHRINK	1370	shrink = F_SHRINK
944	allow_unknown = F_ALLOW_UNKNOWN	1371	allow_unknown = F_ALLOW_UNKNOWN
		1372	allow_sharing = F_ALLOW_SHARING
		1373	allow_cycles = F_ALLOW_CYCLES
		1374	pack_strings = F_PACK_STRINGS
		1375	validate_utf8 = F_VALIDATE_UTF8
945	PPCODE:	1376	PPCODE:
946	{	1377	{
947	if (enable)	1378	if (enable)
948	self->flags |= ix;	1379	self->flags |= ix;
949	else	1380	else
…		…
954		1385
955	void get_shrink (CBOR *self)	1386	void get_shrink (CBOR *self)
956	ALIAS:	1387	ALIAS:
957	get_shrink = F_SHRINK	1388	get_shrink = F_SHRINK
958	get_allow_unknown = F_ALLOW_UNKNOWN	1389	get_allow_unknown = F_ALLOW_UNKNOWN
		1390	get_allow_sharing = F_ALLOW_SHARING
		1391	get_allow_cycles = F_ALLOW_CYCLES
		1392	get_pack_strings = F_PACK_STRINGS
		1393	get_validate_utf8 = F_VALIDATE_UTF8
959	PPCODE:	1394	PPCODE:
960	XPUSHs (boolSV (self->flags & ix));	1395	XPUSHs (boolSV (self->flags & ix));
961		1396
962	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1397	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
963	PPCODE:	1398	PPCODE:
…		…
979	CODE:	1414	CODE:
980	RETVAL = self->max_size;	1415	RETVAL = self->max_size;
981	OUTPUT:	1416	OUTPUT:
982	RETVAL	1417	RETVAL
983		1418
984	#if 0 //TODO	1419	void filter (CBOR *self, SV *filter = 0)
985
986	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
987	PPCODE:	1420	PPCODE:
988	{
989	SvREFCNT_dec (self->cb_object);	1421	SvREFCNT_dec (self->filter);
990	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1422	self->filter = filter ? newSVsv (filter) : filter;
991
992	XPUSHs (ST (0));	1423	XPUSHs (ST (0));
993	}
994		1424
995	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1425	SV *get_filter (CBOR *self)
996	PPCODE:	1426	CODE:
997	{	1427	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
998	if (!self->cb_sk_object)	1428	OUTPUT:
999	self->cb_sk_object = newHV ();	1429	RETVAL
1000
1001	if (SvOK (cb))
1002	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1003	else
1004	{
1005	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1006
1007	if (!HvKEYS (self->cb_sk_object))
1008	{
1009	SvREFCNT_dec (self->cb_sk_object);
1010	self->cb_sk_object = 0;
1011	}
1012	}
1013
1014	XPUSHs (ST (0));
1015	}
1016
1017	#endif
1018		1430
1019	void encode (CBOR *self, SV *scalar)	1431	void encode (CBOR *self, SV *scalar)
1020	PPCODE:	1432	PPCODE:
1021	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1433	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1022	XPUSHs (scalar);	1434	XPUSHs (scalar);
…		…
1035	EXTEND (SP, 2);	1447	EXTEND (SP, 2);
1036	PUSHs (sv);	1448	PUSHs (sv);
1037	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1449	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1038	}	1450	}
1039		1451
1040	#if 0	1452	void incr_parse (CBOR *self, SV *cborstr, int chop = 0)
		1453	PPCODE:
		1454	{
		1455	if (SvUTF8 (cborstr))
		1456	sv_utf8_downgrade (cborstr, 0);
		1457
		1458	if (!self->incr_count)
		1459	{
		1460	self->incr_count = newAV ();
		1461	self->incr_pos = 0;
		1462	self->incr_need = 1;
		1463
		1464	av_push (self->incr_count, newSViv (1));
		1465	}
		1466
		1467	for (;;)
		1468	{
		1469	if (!incr_parse (self, cborstr))
		1470	{
		1471	if (self->incr_need > self->max_size && self->max_size)
		1472	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1473	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1474
		1475	break;
		1476	}
		1477
		1478	SV *sv;
		1479	char *offset;
		1480
		1481	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1482	XPUSHs (sv);
		1483
		1484	av_clear (self->incr_count);
		1485	av_push (self->incr_count, newSViv (1));
		1486
		1487	if (chop)
		1488	{
		1489	self->incr_pos = 0;
		1490	sv_chop (cborstr, offset);
		1491	}
		1492	else
		1493	self->incr_pos = offset - SvPVX (cborstr);
		1494
		1495	self->incr_need = self->incr_pos + 1;
		1496	}
		1497	}
		1498
		1499	void incr_reset (CBOR *self)
		1500	CODE:
		1501	{
		1502	SvREFCNT_dec (self->incr_count);
		1503	self->incr_count = 0;
		1504	}
1041		1505
1042	void DESTROY (CBOR *self)	1506	void DESTROY (CBOR *self)
1043	CODE:	1507	PPCODE:
1044	SvREFCNT_dec (self->cb_sk_object);	1508	cbor_free (self);
1045	SvREFCNT_dec (self->cb_object);
1046
1047	#endif
1048		1509
1049	PROTOTYPES: ENABLE	1510	PROTOTYPES: ENABLE
1050		1511
1051	void encode_cbor (SV *scalar)	1512	void encode_cbor (SV *scalar)
		1513	ALIAS:
		1514	encode_cbor = 0
		1515	encode_cbor_sharing = F_ALLOW_SHARING
1052	PPCODE:	1516	PPCODE:
1053	{	1517	{
1054	CBOR cbor;	1518	CBOR cbor;
1055	cbor_init (&cbor);	1519	cbor_init (&cbor);
		1520	cbor.flags |= ix;
1056	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1521	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1057	XPUSHs (scalar);	1522	XPUSHs (scalar);
1058	}	1523	}
1059		1524
1060	void decode_cbor (SV *cborstr)	1525	void decode_cbor (SV *cborstr)

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