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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.7 by root, Sat Oct 26 23:02:55 2013 UTC vs.
Revision 1.44 by root, Tue Feb 18 22:12:12 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
181	for (i = 0; i <= len; ++i)	329	for (i = 0; i <= len; ++i)
182	{	330	{
183	SV **svp = av_fetch (av, i, 0);	331	SV **svp = av_fetch (av, i, 0);
184	encode_sv (enc, svp ? *svp : &PL_sv_undef);	332	encode_sv (enc, svp ? *svp : &PL_sv_undef);
…		…
199		347
200	int pairs = hv_iterinit (hv);	348	int pairs = hv_iterinit (hv);
201	int mg = SvMAGICAL (hv);	349	int mg = SvMAGICAL (hv);
202		350
203	if (mg)	351	if (mg)
204	encode_ch (enc, 0xa0 | 31);	352	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
205	else	353	else
206	encode_uint (enc, 0xa0, pairs);	354	encode_uint (enc, MAJOR_MAP, pairs);
207		355
208	while ((he = hv_iternext (hv)))	356	while ((he = hv_iternext (hv)))
209	{	357	{
210	if (HeKLEN (he) == HEf_SVKEY)	358	if (HeKLEN (he) == HEf_SVKEY)
211	encode_sv (enc, HeSVKEY (he));	359	encode_sv (enc, HeSVKEY (he));
212	else	360	else
213	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	361	encode_strref (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));
214		362
215	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	363	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
216	}	364	}
217		365
218	if (mg)	366	if (mg)
219	encode_ch (enc, 0xe0 | 31);	367	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
220		368
221	--enc->depth;	369	--enc->depth;
222	}	370	}
223		371
224	// encode objects, arrays and special \0=false and \1=true values.	372	// encode objects, arrays and special \0=false and \1=true values.
225	static void	373	static void
226	encode_rv (enc_t *enc, SV *sv)	374	encode_rv (enc_t *enc, SV *sv)
227	{	375	{
228	svtype svt;
229
230	SvGETMAGIC (sv);	376	SvGETMAGIC (sv);
		377
231	svt = SvTYPE (sv);	378	svtype svt = SvTYPE (sv);
232		379
233	if (ecb_expect_false (SvOBJECT (sv)))	380	if (ecb_expect_false (SvOBJECT (sv)))
234	{	381	{
235	HV *boolean_stash = !CBOR_SLOW || cbor_boolean_stash	382	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
236	? cbor_boolean_stash	383	? types_boolean_stash
237	: gv_stashpv ("CBOR::XS::Boolean", 1);	384	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		385	HV *error_stash = !CBOR_SLOW || types_error_stash
		386	? types_error_stash
		387	: gv_stashpv ("Types::Serialiser::Error", 1);
238	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	388	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
239	? cbor_tagged_stash	389	? cbor_tagged_stash
240	: gv_stashpv ("CBOR::XS::Tagged" , 1);	390	: gv_stashpv ("CBOR::XS::Tagged" , 1);
241		391
		392	HV *stash = SvSTASH (sv);
		393
242	if (SvSTASH (sv) == boolean_stash)	394	if (stash == boolean_stash)
243	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	395	{
		396	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		397	return;
		398	}
		399	else if (stash == error_stash)
		400	{
		401	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		402	return;
		403	}
244	else if (SvSTASH (sv) == tagged_stash)	404	else if (stash == tagged_stash)
245	{	405	{
246	if (svt != SVt_PVAV)	406	if (svt != SVt_PVAV)
247	croak ("encountered CBOR::XS::Tagged object that isn't an array");	407	croak ("encountered CBOR::XS::Tagged object that isn't an array");
248		408
249	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	409	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
250	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));	410	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		411
		412	return;
		413	}
		414	}
		415
		416	if (ecb_expect_false (SvREFCNT (sv) > 1)
		417	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		418	{
		419	if (!enc->shareable)
		420	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		421
		422	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		423
		424	if (SvOK (*svp))
		425	{
		426	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		427	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		428	return;
251	}	429	}
252	else	430	else
253	{	431	{
		432	sv_setuv (*svp, enc->shareable_idx);
		433	++enc->shareable_idx;
		434	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		435	}
		436	}
		437
		438	if (ecb_expect_false (SvOBJECT (sv)))
		439	{
		440	HV *stash = SvSTASH (sv);
		441	GV *method;
		442
		443	if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
		444	{
		445	dSP;
		446
		447	ENTER; SAVETMPS; PUSHMARK (SP);
254	// we re-bless the reference to get overload and other niceties right	448	// 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)));	449	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
263		450
264	// calling with G_SCALAR ensures that we always get a 1 return value
265	PUTBACK;	451	PUTBACK;
		452	// G_SCALAR ensures that return value is 1
266	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	453	call_sv ((SV *)GvCV (method), G_SCALAR);
267	SPAGAIN;	454	SPAGAIN;
268		455
269	// catch this surprisingly common error	456	// catch this surprisingly common error
270	if (SvROK (TOPs) && SvRV (TOPs) == sv)	457	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)));	458	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
272		459
273	sv = POPs;	460	encode_sv (enc, POPs);
		461
274	PUTBACK;	462	PUTBACK;
275		463
276	encode_sv (enc, sv);
277
278	FREETMPS; LEAVE;	464	FREETMPS; LEAVE;
279	}	465	}
		466	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
		467	{
		468	dSP;
		469
		470	ENTER; SAVETMPS; PUSHMARK (SP);
		471	EXTEND (SP, 2);
		472	// we re-bless the reference to get overload and other niceties right
		473	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		474	PUSHs (sv_cbor);
		475
		476	PUTBACK;
		477	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		478	SPAGAIN;
		479
		480	// catch this surprisingly common error
		481	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		482	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		483
		484	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		485	encode_uint (enc, MAJOR_ARRAY, count + 1);
		486	encode_strref (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		487
		488	while (count)
		489	encode_sv (enc, SP[1 - count--]);
		490
		491	PUTBACK;
		492
		493	FREETMPS; LEAVE;
		494	}
280	else	495	else
281	croak ("encountered object '%s', but no TO_CBOR method available on it",	496	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
282	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	497	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
283	}
284	}	498	}
285	else if (svt == SVt_PVHV)	499	else if (svt == SVt_PVHV)
286	encode_hv (enc, (HV *)sv);	500	encode_hv (enc, (HV *)sv);
287	else if (svt == SVt_PVAV)	501	else if (svt == SVt_PVAV)
288	encode_av (enc, (AV *)sv);	502	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	503	else
307	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	504	{
308	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	505	encode_tag (enc, CBOR_TAG_INDIRECTION);
		506	encode_sv (enc, sv);
		507	}
309	}	508	}
310		509
311	static void	510	static void
312	encode_nv (enc_t *enc, SV *sv)	511	encode_nv (enc_t *enc, SV *sv)
313	{	512	{
314	double nv = SvNVX (sv);	513	double nv = SvNVX (sv);
315		514
316	need (enc, 9);	515	need (enc, 9);
317		516
318	if (ecb_expect_false (nv == (U32)nv))	517	if (ecb_expect_false (nv == (NV)(U32)nv))
319	encode_uint (enc, 0x00, (U32)nv);	518	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
320	//TODO: maybe I32?	519	//TODO: maybe I32?
321	else if (ecb_expect_false (nv == (float)nv))	520	else if (ecb_expect_false (nv == (float)nv))
322	{	521	{
323	uint32_t fp = ecb_float_to_binary32 (nv);	522	uint32_t fp = ecb_float_to_binary32 (nv);
324		523
325	*enc->cur++ = 0xe0 | 26;	524	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
326		525
327	if (!ecb_big_endian ())	526	if (!ecb_big_endian ())
328	fp = ecb_bswap32 (fp);	527	fp = ecb_bswap32 (fp);
329		528
330	memcpy (enc->cur, &fp, 4);	529	memcpy (enc->cur, &fp, 4);
…		…
332	}	531	}
333	else	532	else
334	{	533	{
335	uint64_t fp = ecb_double_to_binary64 (nv);	534	uint64_t fp = ecb_double_to_binary64 (nv);
336		535
337	*enc->cur++ = 0xe0 | 27;	536	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
338		537
339	if (!ecb_big_endian ())	538	if (!ecb_big_endian ())
340	fp = ecb_bswap64 (fp);	539	fp = ecb_bswap64 (fp);
341		540
342	memcpy (enc->cur, &fp, 8);	541	memcpy (enc->cur, &fp, 8);
…		…
351		550
352	if (SvPOKp (sv))	551	if (SvPOKp (sv))
353	{	552	{
354	STRLEN len;	553	STRLEN len;
355	char *str = SvPV (sv, len);	554	char *str = SvPV (sv, len);
356	encode_str (enc, SvUTF8 (sv), str, len);	555	encode_strref (enc, SvUTF8 (sv), str, len);
357	}	556	}
358	else if (SvNOKp (sv))	557	else if (SvNOKp (sv))
359	encode_nv (enc, sv);	558	encode_nv (enc, sv);
360	else if (SvIOKp (sv))	559	else if (SvIOKp (sv))
361	{	560	{
362	if (SvIsUV (sv))	561	if (SvIsUV (sv))
363	encode_uint (enc, 0x00, SvUVX (sv));	562	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
364	else if (SvIVX (sv) >= 0)	563	else if (SvIVX (sv) >= 0)
365	encode_uint (enc, 0x00, SvIVX (sv));	564	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
366	else	565	else
367	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	566	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
368	}	567	}
369	else if (SvROK (sv))	568	else if (SvROK (sv))
370	encode_rv (enc, SvRV (sv));	569	encode_rv (enc, SvRV (sv));
371	else if (!SvOK (sv))	570	else if (!SvOK (sv))
372	encode_ch (enc, 0xe0 | 22);	571	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
373	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	572	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
374	encode_ch (enc, 0xe0 | 23);	573	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
375	else	574	else
376	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	575	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
377	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	576	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
378	}	577	}
379		578
380	static SV *	579	static SV *
381	encode_cbor (SV *scalar, CBOR *cbor)	580	encode_cbor (SV *scalar, CBOR *cbor)
382	{	581	{
383	enc_t enc;	582	enc_t enc = { };
384		583
385	enc.cbor = *cbor;	584	enc.cbor = *cbor;
386	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	585	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
387	enc.cur = SvPVX (enc.sv);	586	enc.cur = SvPVX (enc.sv);
388	enc.end = SvEND (enc.sv);	587	enc.end = SvEND (enc.sv);
389	enc.depth = 0;
390		588
391	SvPOK_only (enc.sv);	589	SvPOK_only (enc.sv);
		590
		591	if (cbor->flags & F_PACK_STRINGS)
		592	{
		593	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		594	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		595	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		596	}
		597
392	encode_sv (&enc, scalar);	598	encode_sv (&enc, scalar);
393		599
394	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	600	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
395	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	601	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
396		602
…		…
410	U8 *end; // end of input string	616	U8 *end; // end of input string
411	const char *err; // parse error, if != 0	617	const char *err; // parse error, if != 0
412	CBOR cbor;	618	CBOR cbor;
413	U32 depth; // recursion depth	619	U32 depth; // recursion depth
414	U32 maxdepth; // recursion depth limit	620	U32 maxdepth; // recursion depth limit
		621	AV *shareable;
		622	AV *stringref;
		623	SV *decode_tagged;
415	} dec_t;	624	} dec_t;
416		625
417	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	626	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE
418		627
419	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	628	#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	631	#define DEC_DEC_DEPTH --dec->depth
423		632
424	static UV	633	static UV
425	decode_uint (dec_t *dec)	634	decode_uint (dec_t *dec)
426	{	635	{
427	switch (*dec->cur & 31)	636	U8 m = *dec->cur & MINOR_MASK;
428	{	637	++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		638
434	case 24:	639	if (ecb_expect_true (m < LENGTH_EXT1))
		640	return m;
		641	else if (ecb_expect_true (m == LENGTH_EXT1))
		642	{
435	WANT (2);	643	WANT (1);
436	dec->cur += 2;	644	dec->cur += 1;
437	return dec->cur[-1];	645	return dec->cur[-1];
438		646	}
439	case 25:	647	else if (ecb_expect_true (m == LENGTH_EXT2))
		648	{
440	WANT (3);	649	WANT (2);
441	dec->cur += 3;	650	dec->cur += 2;
442	return (((UV)dec->cur[-2]) << 8)	651	return (((UV)dec->cur[-2]) << 8)
443	| ((UV)dec->cur[-1]);	652	| ((UV)dec->cur[-1]);
444		653	}
445	case 26:	654	else if (ecb_expect_true (m == LENGTH_EXT4))
		655	{
446	WANT (5);	656	WANT (4);
447	dec->cur += 5;	657	dec->cur += 4;
448	return (((UV)dec->cur[-4]) << 24)	658	return (((UV)dec->cur[-4]) << 24)
449	| (((UV)dec->cur[-3]) << 16)	659	| (((UV)dec->cur[-3]) << 16)
450	| (((UV)dec->cur[-2]) << 8)	660	| (((UV)dec->cur[-2]) << 8)
451	| ((UV)dec->cur[-1]);	661	| ((UV)dec->cur[-1]);
452		662	}
453	case 27:	663	else if (ecb_expect_true (m == LENGTH_EXT8))
		664	{
454	WANT (9);	665	WANT (8);
455	dec->cur += 9;	666	dec->cur += 8;
		667
		668	return
		669	#if UVSIZE < 8
		670	0
		671	#else
456	return (((UV)dec->cur[-8]) << 56)	672	(((UV)dec->cur[-8]) << 56)
457	| (((UV)dec->cur[-7]) << 48)	673	| (((UV)dec->cur[-7]) << 48)
458	| (((UV)dec->cur[-6]) << 40)	674	| (((UV)dec->cur[-6]) << 40)
459	| (((UV)dec->cur[-5]) << 32)	675	| (((UV)dec->cur[-5]) << 32)
		676	#endif
460	| (((UV)dec->cur[-4]) << 24)	677	| (((UV)dec->cur[-4]) << 24)
461	| (((UV)dec->cur[-3]) << 16)	678	| (((UV)dec->cur[-3]) << 16)
462	| (((UV)dec->cur[-2]) << 8)	679	| (((UV)dec->cur[-2]) << 8)
463	| ((UV)dec->cur[-1]);	680	| ((UV)dec->cur[-1]);
464		681	}
465	default:	682	else
466	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	683	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
467	}
468		684
469	fail:	685	fail:
470	return 0;	686	return 0;
471	}	687	}
472		688
…		…
477	{	693	{
478	AV *av = newAV ();	694	AV *av = newAV ();
479		695
480	DEC_INC_DEPTH;	696	DEC_INC_DEPTH;
481		697
482	if ((*dec->cur & 31) == 31)	698	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
483	{	699	{
484	++dec->cur;	700	++dec->cur;
485		701
486	for (;;)	702	for (;;)
487	{	703	{
488	WANT (1);	704	WANT (1);
489		705
490	if (*dec->cur == (0xe0 | 31))	706	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
491	{	707	{
492	++dec->cur;	708	++dec->cur;
493	break;	709	break;
494	}	710	}
495		711
…		…
498	}	714	}
499	else	715	else
500	{	716	{
501	int i, len = decode_uint (dec);	717	int i, len = decode_uint (dec);
502		718
		719	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);	720	av_fill (av, len - 1);
504		721
505	for (i = 0; i < len; ++i)	722	for (i = 0; i < len; ++i)
506	AvARRAY (av)[i] = decode_sv (dec);	723	AvARRAY (av)[i] = decode_sv (dec);
507	}	724	}
…		…
513	SvREFCNT_dec (av);	730	SvREFCNT_dec (av);
514	DEC_DEC_DEPTH;	731	DEC_DEC_DEPTH;
515	return &PL_sv_undef;	732	return &PL_sv_undef;
516	}	733	}
517		734
		735	static void
		736	decode_he (dec_t *dec, HV *hv)
		737	{
		738	// for speed reasons, we specialcase single-string
		739	// byte or utf-8 strings as keys, but only when !stringref
		740
		741	if (ecb_expect_true (!dec->stringref))
		742	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		743	{
		744	I32 len = decode_uint (dec);
		745	char *key = (char *)dec->cur;
		746
		747	dec->cur += len;
		748
		749	hv_store (hv, key, len, decode_sv (dec), 0);
		750
		751	return;
		752	}
		753	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		754	{
		755	I32 len = decode_uint (dec);
		756	char *key = (char *)dec->cur;
		757
		758	dec->cur += len;
		759
		760	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		761	if (!is_utf8_string (key, len))
		762	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		763
		764	hv_store (hv, key, -len, decode_sv (dec), 0);
		765
		766	return;
		767	}
		768
		769	SV *k = decode_sv (dec);
		770	SV *v = decode_sv (dec);
		771
		772	hv_store_ent (hv, k, v, 0);
		773	SvREFCNT_dec (k);
		774
		775	fail:
		776	;
		777	}
		778
518	static SV *	779	static SV *
519	decode_hv (dec_t *dec)	780	decode_hv (dec_t *dec)
520	{	781	{
521	HV *hv = newHV ();	782	HV *hv = newHV ();
522		783
523	DEC_INC_DEPTH;	784	DEC_INC_DEPTH;
524		785
525	if ((*dec->cur & 31) == 31)	786	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
526	{	787	{
527	++dec->cur;	788	++dec->cur;
528		789
529	for (;;)	790	for (;;)
530	{	791	{
531	WANT (1);	792	WANT (1);
532		793
533	if (*dec->cur == (0xe0 | 31))	794	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
534	{	795	{
535	++dec->cur;	796	++dec->cur;
536	break;	797	break;
537	}	798	}
538		799
539	SV *k = decode_sv (dec);	800	decode_he (dec, hv);
540	SV *v = decode_sv (dec);
541
542	hv_store_ent (hv, k, v, 0);
543	}	801	}
544	}	802	}
545	else	803	else
546	{	804	{
547	int len = decode_uint (dec);	805	int pairs = decode_uint (dec);
548		806
549	while (len--)	807	while (pairs--)
550	{	808	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	}	809	}
557		810
558	DEC_DEC_DEPTH;	811	DEC_DEC_DEPTH;
559	return newRV_noinc ((SV *)hv);	812	return newRV_noinc ((SV *)hv);
560		813
…		…
567	static SV *	820	static SV *
568	decode_str (dec_t *dec, int utf8)	821	decode_str (dec_t *dec, int utf8)
569	{	822	{
570	SV *sv = 0;	823	SV *sv = 0;
571		824
572	if ((*dec->cur & 31) == 31)	825	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
573	{	826	{
		827	// indefinite length strings
574	++dec->cur;	828	++dec->cur;
575		829
		830	U8 major = *dec->cur & MAJOR_MISC;
		831
576	sv = newSVpvn ("", 0);	832	sv = newSVpvn ("", 0);
577		833
578	// not very fast, and certainly not robust against illegal input
579	for (;;)	834	for (;;)
580	{	835	{
581	WANT (1);	836	WANT (1);
582		837
583	if (*dec->cur == (0xe0 | 31))	838	if ((*dec->cur - major) > LENGTH_EXT8)
		839	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
584	{	840	{
585	++dec->cur;	841	++dec->cur;
586	break;	842	break;
587	}	843	}
		844	else
		845	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
588		846
589	sv_catsv (sv, decode_sv (dec));	847	STRLEN len = decode_uint (dec);
		848
		849	WANT (len);
		850	sv_catpvn (sv, dec->cur, len);
		851	dec->cur += len;
590	}	852	}
591	}	853	}
592	else	854	else
593	{	855	{
594	STRLEN len = decode_uint (dec);	856	STRLEN len = decode_uint (dec);
595		857
596	WANT (len);	858	WANT (len);
597	sv = newSVpvn (dec->cur, len);	859	sv = newSVpvn (dec->cur, len);
598	dec->cur += len;	860	dec->cur += len;
		861
		862	if (ecb_expect_false (dec->stringref)
		863	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		864	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
599	}	865	}
600		866
601	if (utf8)	867	if (utf8)
		868	{
		869	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		870	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		871	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		872
602	SvUTF8_on (sv);	873	SvUTF8_on (sv);
		874	}
603		875
604	return sv;	876	return sv;
605		877
606	fail:	878	fail:
607	SvREFCNT_dec (sv);	879	SvREFCNT_dec (sv);
…		…
609	}	881	}
610		882
611	static SV *	883	static SV *
612	decode_tagged (dec_t *dec)	884	decode_tagged (dec_t *dec)
613	{	885	{
		886	SV *sv = 0;
614	UV tag = decode_uint (dec);	887	UV tag = decode_uint (dec);
		888
		889	WANT (1);
		890
		891	switch (tag)
		892	{
		893	case CBOR_TAG_MAGIC:
615	SV *sv = decode_sv (dec);	894	sv = decode_sv (dec);
		895	break;
616		896
617	if (tag == 55799) // 2.4.5 Self-Describe CBOR	897	case CBOR_TAG_INDIRECTION:
		898	sv = newRV_noinc (decode_sv (dec));
		899	break;
		900
		901	case CBOR_TAG_STRINGREF_NAMESPACE:
		902	{
		903	ENTER; SAVETMPS;
		904
		905	SAVESPTR (dec->stringref);
		906	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		907
		908	sv = decode_sv (dec);
		909
		910	FREETMPS; LEAVE;
		911	}
		912	break;
		913
		914	case CBOR_TAG_STRINGREF:
		915	{
		916	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		917	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		918
		919	UV idx = decode_uint (dec);
		920
		921	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		922	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		923
		924	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		925	}
		926	break;
		927
		928	case CBOR_TAG_VALUE_SHAREABLE:
		929	{
		930	if (ecb_expect_false (!dec->shareable))
		931	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		932
		933	if (dec->cbor.flags & F_ALLOW_CYCLES)
		934	{
		935	sv = newSV (0);
		936	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		937
		938	SV *osv = decode_sv (dec);
		939	sv_setsv (sv, osv);
		940	SvREFCNT_dec_NN (osv);
		941	}
		942	else
		943	{
		944	av_push (dec->shareable, &PL_sv_undef);
		945	int idx = AvFILLp (dec->shareable);
		946	sv = decode_sv (dec);
		947	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		948	}
		949	}
		950	break;
		951
		952	case CBOR_TAG_VALUE_SHAREDREF:
		953	{
		954	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		955	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		956
		957	UV idx = decode_uint (dec);
		958
		959	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		960	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		961
		962	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		963
		964	if (sv == &PL_sv_undef)
		965	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		966	}
		967	break;
		968
		969	case CBOR_TAG_PERL_OBJECT:
		970	{
		971	sv = decode_sv (dec);
		972
		973	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		974	ERR ("corrupted CBOR data (non-array perl object)");
		975
		976	AV *av = (AV *)SvRV (sv);
		977	int len = av_len (av) + 1;
		978	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		979
		980	if (!stash)
		981	ERR ("cannot decode perl-object (package does not exist)");
		982
		983	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		984
		985	if (!method)
		986	ERR ("cannot decode perl-object (package does not have a THAW method)");
		987
		988	dSP;
		989
		990	ENTER; SAVETMPS; PUSHMARK (SP);
		991	EXTEND (SP, len + 1);
		992	// we re-bless the reference to get overload and other niceties right
		993	PUSHs (*av_fetch (av, 0, 1));
		994	PUSHs (sv_cbor);
		995
		996	int i;
		997
		998	for (i = 1; i < len; ++i)
		999	PUSHs (*av_fetch (av, i, 1));
		1000
		1001	PUTBACK;
		1002	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1003	SPAGAIN;
		1004
		1005	if (SvTRUE (ERRSV))
		1006	{
		1007	FREETMPS; LEAVE;
		1008	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1009	}
		1010
		1011	SvREFCNT_dec (sv);
		1012	sv = SvREFCNT_inc (POPs);
		1013
		1014	PUTBACK;
		1015
		1016	FREETMPS; LEAVE;
		1017	}
		1018	break;
		1019
		1020	default:
		1021	{
		1022	sv = decode_sv (dec);
		1023
		1024	dSP;
		1025	ENTER; SAVETMPS; PUSHMARK (SP);
		1026	EXTEND (SP, 2);
		1027	PUSHs (newSVuv (tag));
		1028	PUSHs (sv);
		1029
		1030	PUTBACK;
		1031	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1032	SPAGAIN;
		1033
		1034	if (SvTRUE (ERRSV))
		1035	{
		1036	FREETMPS; LEAVE;
		1037	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1038	}
		1039
		1040	if (count)
		1041	{
		1042	SvREFCNT_dec (sv);
		1043	sv = SvREFCNT_inc (POPs);
		1044	}
		1045	else
		1046	{
		1047	AV *av = newAV ();
		1048	av_push (av, newSVuv (tag));
		1049	av_push (av, sv);
		1050
		1051	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1052	? cbor_tagged_stash
		1053	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1054	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1055	}
		1056
		1057	PUTBACK;
		1058
		1059	FREETMPS; LEAVE;
		1060	}
		1061	break;
		1062	}
		1063
618	return sv;	1064	return sv;
619		1065
620	AV *av = newAV ();	1066	fail:
621	av_push (av, newSVuv (tag));	1067	SvREFCNT_dec (sv);
622	av_push (av, sv);	1068	return &PL_sv_undef;
623
624	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
625	? cbor_tagged_stash
626	: gv_stashpv ("CBOR::XS::Tagged" , 1);
627
628	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);
629	}	1069	}
630		1070
631	static SV *	1071	static SV *
632	decode_sv (dec_t *dec)	1072	decode_sv (dec_t *dec)
633	{	1073	{
634	WANT (1);	1074	WANT (1);
635		1075
636	switch (*dec->cur >> 5)	1076	switch (*dec->cur >> MAJOR_SHIFT)
637	{	1077	{
638	case 0: // unsigned int	1078	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
639	return newSVuv (decode_uint (dec));	1079	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
640	case 1: // negative int	1080	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
641	return newSViv (-1 - (IV)decode_uint (dec));	1081	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
642	case 2: // octet string	1082	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
643	return decode_str (dec, 0);	1083	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
644	case 3: // utf-8 string	1084	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
645	return decode_str (dec, 1);	1085
646	case 4: // array	1086	case MAJOR_MISC >> MAJOR_SHIFT:
647	return decode_av (dec);
648	case 5: // map
649	return decode_hv (dec);
650	case 6: // tag
651	return decode_tagged (dec);
652	case 7: // misc
653	switch (*dec->cur++ & 31)	1087	switch (*dec->cur++ & MINOR_MASK)
654	{	1088	{
655	case 20:	1089	case SIMPLE_FALSE:
656	#if CBOR_SLOW	1090	#if CBOR_SLOW
657	cbor_false = get_bool ("CBOR::XS::false");	1091	types_false = get_bool ("Types::Serialiser::false");
658	#endif	1092	#endif
659	return newSVsv (cbor_false);	1093	return newSVsv (types_false);
660	case 21:	1094	case SIMPLE_TRUE:
661	#if CBOR_SLOW	1095	#if CBOR_SLOW
662	cbor_true = get_bool ("CBOR::XS::true");	1096	types_true = get_bool ("Types::Serialiser::true");
663	#endif	1097	#endif
664	return newSVsv (cbor_true);	1098	return newSVsv (types_true);
665	case 22:	1099	case SIMPLE_NULL:
666	return newSVsv (&PL_sv_undef);	1100	return newSVsv (&PL_sv_undef);
		1101	case SIMPLE_UNDEF:
		1102	#if CBOR_SLOW
		1103	types_error = get_bool ("Types::Serialiser::error");
		1104	#endif
		1105	return newSVsv (types_error);
667		1106
668	case 25:	1107	case MISC_FLOAT16:
669	{	1108	{
670	WANT (2);	1109	WANT (2);
671		1110
672	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1111	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
673	dec->cur += 2;	1112	dec->cur += 2;
674		1113
675	return newSVnv (ecb_binary16_to_float (fp));	1114	return newSVnv (ecb_binary16_to_float (fp));
676	}	1115	}
677		1116
678	case 26:	1117	case MISC_FLOAT32:
679	{	1118	{
680	uint32_t fp;	1119	uint32_t fp;
681	WANT (4);	1120	WANT (4);
682	memcpy (&fp, dec->cur, 4);	1121	memcpy (&fp, dec->cur, 4);
683	dec->cur += 4;	1122	dec->cur += 4;
…		…
686	fp = ecb_bswap32 (fp);	1125	fp = ecb_bswap32 (fp);
687		1126
688	return newSVnv (ecb_binary32_to_float (fp));	1127	return newSVnv (ecb_binary32_to_float (fp));
689	}	1128	}
690		1129
691	case 27:	1130	case MISC_FLOAT64:
692	{	1131	{
693	uint64_t fp;	1132	uint64_t fp;
694	WANT (8);	1133	WANT (8);
695	memcpy (&fp, dec->cur, 8);	1134	memcpy (&fp, dec->cur, 8);
696	dec->cur += 8;	1135	dec->cur += 8;
…		…
699	fp = ecb_bswap64 (fp);	1138	fp = ecb_bswap64 (fp);
700		1139
701	return newSVnv (ecb_binary64_to_double (fp));	1140	return newSVnv (ecb_binary64_to_double (fp));
702	}	1141	}
703		1142
704	// 0..19 unassigned	1143	// 0..19 unassigned simple
705	// 24 reserved + unassigned (reserved values are not encodable)	1144	// 24 reserved + unassigned simple (reserved values are not encodable)
		1145	// 28-30 unassigned misc
		1146	// 31 break code
706	default:	1147	default:
707	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1148	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
708	}	1149	}
709		1150
710	break;	1151	break;
711	}	1152	}
712		1153
…		…
715	}	1156	}
716		1157
717	static SV *	1158	static SV *
718	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1159	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
719	{	1160	{
720	dec_t dec;	1161	dec_t dec = { };
721	SV *sv;	1162	SV *sv;
		1163	STRLEN len;
		1164	char *data = SvPVbyte (string, len);
722		1165
723	/* work around bugs in 5.10 where manipulating magic values
724	* makes perl ignore the magic in subsequent accesses.
725	* also make a copy of non-PV values, to get them into a clean
726	* state (SvPV should do that, but it's buggy, see below).
727	*/
728	/*SvGETMAGIC (string);*/
729	if (SvMAGICAL (string) || !SvPOK (string))
730	string = sv_2mortal (newSVsv (string));
731
732	SvUPGRADE (string, SVt_PV);
733
734	/* work around a bug in perl 5.10, which causes SvCUR to fail an
735	* assertion with -DDEBUGGING, although SvCUR is documented to
736	* return the xpv_cur field which certainly exists after upgrading.
737	* according to nicholas clark, calling SvPOK fixes this.
738	* But it doesn't fix it, so try another workaround, call SvPV_nolen
739	* and hope for the best.
740	* Damnit, SvPV_nolen still trips over yet another assertion. This
741	* assertion business is seriously broken, try yet another workaround
742	* for the broken -DDEBUGGING.
743	*/
744	{
745	#ifdef DEBUGGING
746	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
747	#else
748	STRLEN offset = SvCUR (string);
749	#endif
750
751	if (offset > cbor->max_size && cbor->max_size)	1166	if (len > cbor->max_size && cbor->max_size)
752	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1167	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
753	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1168	(unsigned long)len, (unsigned long)cbor->max_size);
754	}
755
756	sv_utf8_downgrade (string, 0);
757		1169
758	dec.cbor = *cbor;	1170	dec.cbor = *cbor;
759	dec.cur = (U8 *)SvPVX (string);	1171	dec.cur = (U8 *)data;
760	dec.end = (U8 *)SvEND (string);	1172	dec.end = (U8 *)data + len;
761	dec.err = 0;
762	dec.depth = 0;
763		1173
764	sv = decode_sv (&dec);	1174	sv = decode_sv (&dec);
765		1175
766	if (offset_return)	1176	if (offset_return)
767	*offset_return = dec.cur;	1177	*offset_return = dec.cur;
…		…
770	if (dec.cur != dec.end && !dec.err)	1180	if (dec.cur != dec.end && !dec.err)
771	dec.err = "garbage after CBOR object";	1181	dec.err = "garbage after CBOR object";
772		1182
773	if (dec.err)	1183	if (dec.err)
774	{	1184	{
		1185	if (dec.shareable)
		1186	{
		1187	// need to break cyclic links, which whould all be in shareable
		1188	int i;
		1189	SV **svp;
		1190
		1191	for (i = av_len (dec.shareable) + 1; i--; )
		1192	if ((svp = av_fetch (dec.shareable, i, 0)))
		1193	sv_setsv (*svp, &PL_sv_undef);
		1194	}
		1195
775	SvREFCNT_dec (sv);	1196	SvREFCNT_dec (sv);
776	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1197	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
777	}	1198	}
778		1199
779	sv = sv_2mortal (sv);	1200	sv = sv_2mortal (sv);
780		1201
781	return sv;	1202	return sv;
782	}	1203	}
783		1204
		1205	/////////////////////////////////////////////////////////////////////////////
		1206	// incremental parser
		1207
		1208	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1209
		1210	// returns 0 for notyet, 1 for success or error
		1211	static int
		1212	incr_parse (CBOR *self, SV *cborstr)
		1213	{
		1214	STRLEN cur;
		1215	SvPV (cborstr, cur);
		1216
		1217	while (ecb_expect_true (self->incr_need <= cur))
		1218	{
		1219	// table of integer count bytes
		1220	static I8 incr_len[MINOR_MASK + 1] = {
		1221	0, 0, 0, 0, 0, 0, 0, 0,
		1222	0, 0, 0, 0, 0, 0, 0, 0,
		1223	0, 0, 0, 0, 0, 0, 0, 0,
		1224	1, 2, 4, 8,-1,-1,-1,-2
		1225	};
		1226
		1227	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1228	U8 m = *p & MINOR_MASK;
		1229	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1230	I8 ilen = incr_len[m];
		1231
		1232	self->incr_need = self->incr_pos + 1;
		1233
		1234	if (ecb_expect_false (ilen < 0))
		1235	{
		1236	if (m != MINOR_INDEF)
		1237	return 1; // error
		1238
		1239	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1240	{
		1241	if (count >= 0)
		1242	return 1; // error
		1243
		1244	count = 1;
		1245	}
		1246	else
		1247	{
		1248	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1249	count = -1;
		1250	}
		1251	}
		1252	else
		1253	{
		1254	self->incr_need += ilen;
		1255	if (ecb_expect_false (self->incr_need > cur))
		1256	return 0;
		1257
		1258	int major = *p >> MAJOR_SHIFT;
		1259
		1260	switch (major)
		1261	{
		1262	case MAJOR_BYTES >> MAJOR_SHIFT:
		1263	case MAJOR_TEXT >> MAJOR_SHIFT:
		1264	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1265	case MAJOR_MAP >> MAJOR_SHIFT:
		1266	{
		1267	UV len;
		1268
		1269	if (ecb_expect_false (ilen))
		1270	{
		1271	len = 0;
		1272
		1273	do {
		1274	len = (len << 8) | *++p;
		1275	} while (--ilen);
		1276	}
		1277	else
		1278	len = m;
		1279
		1280	switch (major)
		1281	{
		1282	case MAJOR_BYTES >> MAJOR_SHIFT:
		1283	case MAJOR_TEXT >> MAJOR_SHIFT:
		1284	self->incr_need += len;
		1285	if (ecb_expect_false (self->incr_need > cur))
		1286	return 0;
		1287
		1288	break;
		1289
		1290	case MAJOR_MAP >> MAJOR_SHIFT:
		1291	len <<= 1;
		1292	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1293	if (len)
		1294	{
		1295	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1296	count = len + 1;
		1297	}
		1298	break;
		1299	}
		1300	}
		1301	}
		1302	}
		1303
		1304	self->incr_pos = self->incr_need;
		1305
		1306	if (count > 0)
		1307	{
		1308	while (!--count)
		1309	{
		1310	if (!AvFILLp (self->incr_count))
		1311	return 1; // done
		1312
		1313	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1314	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1315	}
		1316
		1317	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1318	}
		1319	}
		1320
		1321	return 0;
		1322	}
		1323
		1324
784	/////////////////////////////////////////////////////////////////////////////	1325	/////////////////////////////////////////////////////////////////////////////
785	// XS interface functions	1326	// XS interface functions
786		1327
787	MODULE = CBOR::XS PACKAGE = CBOR::XS	1328	MODULE = CBOR::XS PACKAGE = CBOR::XS
788		1329
789	BOOT:	1330	BOOT:
790	{	1331	{
791	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1332	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
792	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);
793	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);	1333	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
794		1334
795	cbor_true = get_bool ("CBOR::XS::true");	1335	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
796	cbor_false = get_bool ("CBOR::XS::false");	1336	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1337
		1338	types_true = get_bool ("Types::Serialiser::true" );
		1339	types_false = get_bool ("Types::Serialiser::false");
		1340	types_error = get_bool ("Types::Serialiser::error");
		1341
		1342	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1343
		1344	sv_cbor = newSVpv ("CBOR", 0);
		1345	SvREADONLY_on (sv_cbor);
797	}	1346	}
798		1347
799	PROTOTYPES: DISABLE	1348	PROTOTYPES: DISABLE
800		1349
801	void CLONE (...)	1350	void CLONE (...)
802	CODE:	1351	CODE:
803	cbor_stash = 0;	1352	cbor_stash = 0;
804	cbor_boolean_stash = 0;
805	cbor_tagged_stash = 0;	1353	cbor_tagged_stash = 0;
		1354	types_error_stash = 0;
		1355	types_boolean_stash = 0;
806		1356
807	void new (char *klass)	1357	void new (char *klass)
808	PPCODE:	1358	PPCODE:
809	{	1359	{
810	SV *pv = NEWSV (0, sizeof (CBOR));	1360	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
818		1368
819	void shrink (CBOR *self, int enable = 1)	1369	void shrink (CBOR *self, int enable = 1)
820	ALIAS:	1370	ALIAS:
821	shrink = F_SHRINK	1371	shrink = F_SHRINK
822	allow_unknown = F_ALLOW_UNKNOWN	1372	allow_unknown = F_ALLOW_UNKNOWN
		1373	allow_sharing = F_ALLOW_SHARING
		1374	allow_cycles = F_ALLOW_CYCLES
		1375	pack_strings = F_PACK_STRINGS
		1376	validate_utf8 = F_VALIDATE_UTF8
823	PPCODE:	1377	PPCODE:
824	{	1378	{
825	if (enable)	1379	if (enable)
826	self->flags |= ix;	1380	self->flags |= ix;
827	else	1381	else
…		…
832		1386
833	void get_shrink (CBOR *self)	1387	void get_shrink (CBOR *self)
834	ALIAS:	1388	ALIAS:
835	get_shrink = F_SHRINK	1389	get_shrink = F_SHRINK
836	get_allow_unknown = F_ALLOW_UNKNOWN	1390	get_allow_unknown = F_ALLOW_UNKNOWN
		1391	get_allow_sharing = F_ALLOW_SHARING
		1392	get_allow_cycles = F_ALLOW_CYCLES
		1393	get_pack_strings = F_PACK_STRINGS
		1394	get_validate_utf8 = F_VALIDATE_UTF8
837	PPCODE:	1395	PPCODE:
838	XPUSHs (boolSV (self->flags & ix));	1396	XPUSHs (boolSV (self->flags & ix));
839		1397
840	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1398	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
841	PPCODE:	1399	PPCODE:
…		…
857	CODE:	1415	CODE:
858	RETVAL = self->max_size;	1416	RETVAL = self->max_size;
859	OUTPUT:	1417	OUTPUT:
860	RETVAL	1418	RETVAL
861		1419
862	#if 0 //TODO	1420	void filter (CBOR *self, SV *filter = 0)
863
864	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
865	PPCODE:	1421	PPCODE:
866	{
867	SvREFCNT_dec (self->cb_object);	1422	SvREFCNT_dec (self->filter);
868	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1423	self->filter = filter ? newSVsv (filter) : filter;
869
870	XPUSHs (ST (0));	1424	XPUSHs (ST (0));
871	}
872		1425
873	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1426	SV *get_filter (CBOR *self)
874	PPCODE:	1427	CODE:
875	{	1428	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
876	if (!self->cb_sk_object)	1429	OUTPUT:
877	self->cb_sk_object = newHV ();	1430	RETVAL
878
879	if (SvOK (cb))
880	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
881	else
882	{
883	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
884
885	if (!HvKEYS (self->cb_sk_object))
886	{
887	SvREFCNT_dec (self->cb_sk_object);
888	self->cb_sk_object = 0;
889	}
890	}
891
892	XPUSHs (ST (0));
893	}
894
895	#endif
896		1431
897	void encode (CBOR *self, SV *scalar)	1432	void encode (CBOR *self, SV *scalar)
898	PPCODE:	1433	PPCODE:
899	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1434	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
900	XPUSHs (scalar);	1435	XPUSHs (scalar);
…		…
913	EXTEND (SP, 2);	1448	EXTEND (SP, 2);
914	PUSHs (sv);	1449	PUSHs (sv);
915	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1450	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
916	}	1451	}
917		1452
918	#if 0	1453	void incr_parse (CBOR *self, SV *cborstr)
		1454	ALIAS:
		1455	incr_parse_multiple = 1
		1456	PPCODE:
		1457	{
		1458	if (SvUTF8 (cborstr))
		1459	sv_utf8_downgrade (cborstr, 0);
		1460
		1461	if (!self->incr_count)
		1462	{
		1463	self->incr_count = newAV ();
		1464	self->incr_pos = 0;
		1465	self->incr_need = 1;
		1466
		1467	av_push (self->incr_count, newSViv (1));
		1468	}
		1469
		1470	do
		1471	{
		1472	if (!incr_parse (self, cborstr))
		1473	{
		1474	if (self->incr_need > self->max_size && self->max_size)
		1475	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1476	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1477
		1478	break;
		1479	}
		1480
		1481	SV *sv;
		1482	char *offset;
		1483
		1484	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1485	XPUSHs (sv);
		1486
		1487	sv_chop (cborstr, offset);
		1488
		1489	av_clear (self->incr_count);
		1490	av_push (self->incr_count, newSViv (1));
		1491
		1492	self->incr_pos = 0;
		1493	self->incr_need = self->incr_pos + 1;
		1494	}
		1495	while (ix);
		1496	}
		1497
		1498	void incr_reset (CBOR *self)
		1499	CODE:
		1500	{
		1501	SvREFCNT_dec (self->incr_count);
		1502	self->incr_count = 0;
		1503	}
919		1504
920	void DESTROY (CBOR *self)	1505	void DESTROY (CBOR *self)
921	CODE:	1506	PPCODE:
922	SvREFCNT_dec (self->cb_sk_object);	1507	cbor_free (self);
923	SvREFCNT_dec (self->cb_object);
924
925	#endif
926		1508
927	PROTOTYPES: ENABLE	1509	PROTOTYPES: ENABLE
928		1510
929	void encode_cbor (SV *scalar)	1511	void encode_cbor (SV *scalar)
		1512	ALIAS:
		1513	encode_cbor = 0
		1514	encode_cbor_sharing = F_ALLOW_SHARING
930	PPCODE:	1515	PPCODE:
931	{	1516	{
932	CBOR cbor;	1517	CBOR cbor;
933	cbor_init (&cbor);	1518	cbor_init (&cbor);
		1519	cbor.flags |= ix;
934	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1520	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
935	XPUSHs (scalar);	1521	XPUSHs (scalar);
936	}	1522	}
937		1523
938	void decode_cbor (SV *cborstr)	1524	void decode_cbor (SV *cborstr)

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