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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.5 by root, Sat Oct 26 21:14:20 2013 UTC vs.
Revision 1.36 by root, Sat Nov 30 17:37:45 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
		65	// known tags
		66	enum cbor_tag
		67	{
		68	// extensions
		69	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
		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
		76
		77	// rfc7049
		78	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
		79	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
		80	CBOR_TAG_POS_BIGNUM = 2, // byte string
		81	CBOR_TAG_NEG_BIGNUM = 3, // byte string
		82	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
		83	CBOR_TAG_BIGFLOAT = 5, // array
		84
		85	CBOR_TAG_CONV_B64U = 21, // base64url, any
		86	CBOR_TAG_CONV_B64 = 22, // base64, any
		87	CBOR_TAG_CONV_HEX = 23, // base16, any
		88	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
		89
		90	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
		91	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
		92	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
		93	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
		94	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
		95
		96	CBOR_TAG_MAGIC = 55799, // self-describe cbor
		97	};
		98
14	#define F_SHRINK 0x00000200UL	99	#define F_SHRINK 0x00000001UL
15	#define F_ALLOW_UNKNOWN 0x00002000UL	100	#define F_ALLOW_UNKNOWN 0x00000002UL
		101	#define F_ALLOW_SHARING 0x00000004UL
		102	#define F_PACK_STRINGS 0x00000008UL
16		103
17	#define INIT_SIZE 32 // initial scalar size to be allocated	104	#define INIT_SIZE 32 // initial scalar size to be allocated
18		105
19	#define SB do {	106	#define SB do {
20	#define SE } while (0)	107	#define SE } while (0)
…		…
31	#else	118	#else
32	# define CBOR_SLOW 0	119	# define CBOR_SLOW 0
33	# define CBOR_STASH cbor_stash	120	# define CBOR_STASH cbor_stash
34	#endif	121	#endif
35		122
36	static HV *cbor_stash, *cbor_boolean_stash; // CBOR::XS::	123	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
37	static SV *cbor_true, *cbor_false;	124	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
38		125
39	typedef struct {	126	typedef struct {
40	U32 flags;	127	U32 flags;
41	U32 max_depth;	128	U32 max_depth;
42	STRLEN max_size;	129	STRLEN max_size;
43		130	SV *filter;
44	SV *cb_object;
45	HV *cb_sk_object;
46	} CBOR;	131	} CBOR;
47		132
48	ecb_inline void	133	ecb_inline void
49	cbor_init (CBOR *cbor)	134	cbor_init (CBOR *cbor)
50	{	135	{
51	Zero (cbor, 1, CBOR);	136	Zero (cbor, 1, CBOR);
52	cbor->max_depth = 512;	137	cbor->max_depth = 512;
		138	}
		139
		140	ecb_inline void
		141	cbor_free (CBOR *cbor)
		142	{
		143	SvREFCNT_dec (cbor->filter);
53	}	144	}
54		145
55	/////////////////////////////////////////////////////////////////////////////	146	/////////////////////////////////////////////////////////////////////////////
56	// utility functions	147	// utility functions
57		148
…		…
79	SvPV_renew (sv, SvCUR (sv) + 1);	170	SvPV_renew (sv, SvCUR (sv) + 1);
80	#endif	171	#endif
81	}	172	}
82	}	173	}
83		174
84	/////////////////////////////////////////////////////////////////////////////	175	// minimum length of a string to be registered for stringref
85	// fp hell	176	ecb_inline int
86		177	minimum_string_length (UV idx)
87	//TODO	178	{
		179	return idx > 23
		180	? idx > 0xffU
		181	? idx > 0xffffU
		182	? idx > 0xffffffffU
		183	? 11
		184	: 7
		185	: 5
		186	: 4
		187	: 3;
		188	}
88		189
89	/////////////////////////////////////////////////////////////////////////////	190	/////////////////////////////////////////////////////////////////////////////
90	// encoder	191	// encoder
91		192
92	// structure used for encoding CBOR	193	// structure used for encoding CBOR
…		…
95	char *cur; // SvPVX (sv) + current output position	196	char *cur; // SvPVX (sv) + current output position
96	char *end; // SvEND (sv)	197	char *end; // SvEND (sv)
97	SV *sv; // result scalar	198	SV *sv; // result scalar
98	CBOR cbor;	199	CBOR cbor;
99	U32 depth; // recursion level	200	U32 depth; // recursion level
		201	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		202	UV stringref_idx;
		203	HV *shareable; // ptr => index, or 0
		204	UV shareable_idx;
100	} enc_t;	205	} enc_t;
101		206
102	ecb_inline void	207	ecb_inline void
103	need (enc_t *enc, STRLEN len)	208	need (enc_t *enc, STRLEN len)
104	{	209	{
…		…
121	static void	226	static void
122	encode_uint (enc_t *enc, int major, UV len)	227	encode_uint (enc_t *enc, int major, UV len)
123	{	228	{
124	need (enc, 9);	229	need (enc, 9);
125		230
126	if (len < 24)	231	if (ecb_expect_true (len < LENGTH_EXT1))
127	*enc->cur++ = major | len;	232	*enc->cur++ = major | len;
128	else if (len <= 0xff)	233	else if (ecb_expect_true (len <= 0xffU))
129	{	234	{
130	*enc->cur++ = major | 24;	235	*enc->cur++ = major | LENGTH_EXT1;
131	*enc->cur++ = len;	236	*enc->cur++ = len;
132	}	237	}
133	else if (len <= 0xffff)	238	else if (len <= 0xffffU)
134	{	239	{
135	*enc->cur++ = major | 25;	240	*enc->cur++ = major | LENGTH_EXT2;
136	*enc->cur++ = len >> 8;	241	*enc->cur++ = len >> 8;
137	*enc->cur++ = len;	242	*enc->cur++ = len;
138	}	243	}
139	else if (len <= 0xffffffff)	244	else if (len <= 0xffffffffU)
140	{	245	{
141	*enc->cur++ = major | 26;	246	*enc->cur++ = major | LENGTH_EXT4;
142	*enc->cur++ = len >> 24;	247	*enc->cur++ = len >> 24;
143	*enc->cur++ = len >> 16;	248	*enc->cur++ = len >> 16;
144	*enc->cur++ = len >> 8;	249	*enc->cur++ = len >> 8;
145	*enc->cur++ = len;	250	*enc->cur++ = len;
146	}	251	}
147	else	252	else
148	{	253	{
149	*enc->cur++ = major | 27;	254	*enc->cur++ = major | LENGTH_EXT8;
150	*enc->cur++ = len >> 56;	255	*enc->cur++ = len >> 56;
151	*enc->cur++ = len >> 48;	256	*enc->cur++ = len >> 48;
152	*enc->cur++ = len >> 40;	257	*enc->cur++ = len >> 40;
153	*enc->cur++ = len >> 32;	258	*enc->cur++ = len >> 32;
154	*enc->cur++ = len >> 24;	259	*enc->cur++ = len >> 24;
…		…
156	*enc->cur++ = len >> 8;	261	*enc->cur++ = len >> 8;
157	*enc->cur++ = len;	262	*enc->cur++ = len;
158	}	263	}
159	}	264	}
160		265
161	static void	266	ecb_inline void
		267	encode_tag (enc_t *enc, UV tag)
		268	{
		269	encode_uint (enc, MAJOR_TAG, tag);
		270	}
		271
		272	ecb_inline void
162	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	273	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)
163	{	274	{
164	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	275	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
165	need (enc, len);	276	need (enc, len);
166	memcpy (enc->cur, str, len);	277	memcpy (enc->cur, str, len);
167	enc->cur += len;	278	enc->cur += len;
168	}	279	}
169		280
		281	static void
		282	encode_strref (enc_t *enc, int utf8, char *str, STRLEN len)
		283	{
		284	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		285	{
		286	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		287
		288	if (SvOK (*svp))
		289	{
		290	// already registered, use stringref
		291	encode_tag (enc, CBOR_TAG_STRINGREF);
		292	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		293	return;
		294	}
		295	else if (len >= minimum_string_length (enc->stringref_idx))
		296	{
		297	// register only
		298	sv_setuv (*svp, enc->stringref_idx);
		299	++enc->stringref_idx;
		300	}
		301	}
		302
		303	encode_str (enc, utf8, str, len);
		304	}
		305
170	static void encode_sv (enc_t *enc, SV *sv);	306	static void encode_sv (enc_t *enc, SV *sv);
171		307
172	static void	308	static void
173	encode_av (enc_t *enc, AV *av)	309	encode_av (enc_t *enc, AV *av)
174	{	310	{
…		…
177	if (enc->depth >= enc->cbor.max_depth)	313	if (enc->depth >= enc->cbor.max_depth)
178	croak (ERR_NESTING_EXCEEDED);	314	croak (ERR_NESTING_EXCEEDED);
179		315
180	++enc->depth;	316	++enc->depth;
181		317
182	encode_uint (enc, 0x80, len + 1);	318	encode_uint (enc, MAJOR_ARRAY, len + 1);
183		319
184	for (i = 0; i <= len; ++i)	320	for (i = 0; i <= len; ++i)
185	{	321	{
186	SV **svp = av_fetch (av, i, 0);	322	SV **svp = av_fetch (av, i, 0);
187	encode_sv (enc, svp ? *svp : &PL_sv_undef);	323	encode_sv (enc, svp ? *svp : &PL_sv_undef);
…		…
202		338
203	int pairs = hv_iterinit (hv);	339	int pairs = hv_iterinit (hv);
204	int mg = SvMAGICAL (hv);	340	int mg = SvMAGICAL (hv);
205		341
206	if (mg)	342	if (mg)
207	encode_ch (enc, 0xa0 | 31);	343	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
208	else	344	else
209	encode_uint (enc, 0xa0, pairs);	345	encode_uint (enc, MAJOR_MAP, pairs);
210		346
211	while ((he = hv_iternext (hv)))	347	while ((he = hv_iternext (hv)))
212	{	348	{
213	if (HeKLEN (he) == HEf_SVKEY)	349	if (HeKLEN (he) == HEf_SVKEY)
214	encode_sv (enc, HeSVKEY (he));	350	encode_sv (enc, HeSVKEY (he));
215	else	351	else
216	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	352	encode_strref (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));
217		353
218	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	354	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
219	}	355	}
220		356
221	if (mg)	357	if (mg)
222	encode_ch (enc, 0xe0 | 31);	358	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
223		359
224	--enc->depth;	360	--enc->depth;
225	}	361	}
226		362
227	// encode objects, arrays and special \0=false and \1=true values.	363	// encode objects, arrays and special \0=false and \1=true values.
228	static void	364	static void
229	encode_rv (enc_t *enc, SV *sv)	365	encode_rv (enc_t *enc, SV *sv)
230	{	366	{
231	svtype svt;
232
233	SvGETMAGIC (sv);	367	SvGETMAGIC (sv);
		368
234	svt = SvTYPE (sv);	369	svtype svt = SvTYPE (sv);
235		370
236	if (ecb_expect_false (SvOBJECT (sv)))	371	if (ecb_expect_false (SvOBJECT (sv)))
237	{	372	{
238	HV *stash = !CBOR_SLOW || cbor_boolean_stash	373	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
239	? cbor_boolean_stash	374	? types_boolean_stash
		375	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		376	HV *error_stash = !CBOR_SLOW || types_error_stash
		377	? types_error_stash
		378	: gv_stashpv ("Types::Serialiser::Error", 1);
		379	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		380	? cbor_tagged_stash
240	: gv_stashpv ("CBOR::XS::Boolean", 1);	381	: gv_stashpv ("CBOR::XS::Tagged" , 1);
241		382
242	if (SvSTASH (sv) == stash)	383	HV *stash = SvSTASH (sv);
243	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	384
		385	if (stash == boolean_stash)
		386	{
		387	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		388	return;
		389	}
		390	else if (stash == error_stash)
		391	{
		392	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		393	return;
		394	}
		395	else if (stash == tagged_stash)
		396	{
		397	if (svt != SVt_PVAV)
		398	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		399
		400	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
		401	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		402
		403	return;
		404	}
		405	}
		406
		407	if (ecb_expect_false (SvREFCNT (sv) > 1)
		408	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		409	{
		410	if (!enc->shareable)
		411	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		412
		413	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		414
		415	if (SvOK (*svp))
		416	{
		417	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		418	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		419	return;
		420	}
244	else	421	else
245	{	422	{
246	#if 0 //TODO	423	sv_setuv (*svp, enc->shareable_idx);
247	if (enc->cbor.flags & F_CONV_BLESSED)	424	++enc->shareable_idx;
		425	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		426	}
		427	}
		428
		429	if (ecb_expect_false (SvOBJECT (sv)))
		430	{
		431	HV *stash = SvSTASH (sv);
		432	GV *method;
		433
		434	if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
248	{	435	{
		436	dSP;
		437
		438	ENTER; SAVETMPS; PUSHMARK (SP);
249	// we re-bless the reference to get overload and other niceties right	439	// we re-bless the reference to get overload and other niceties right
250	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
251
252	if (to_cbor)
253	{
254	dSP;
255
256	ENTER; SAVETMPS; PUSHMARK (SP);
257	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	440	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
258		441
259	// calling with G_SCALAR ensures that we always get a 1 return value
260	PUTBACK;	442	PUTBACK;
		443	// G_SCALAR ensures that return value is 1
261	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	444	call_sv ((SV *)GvCV (method), G_SCALAR);
262	SPAGAIN;	445	SPAGAIN;
263		446
264	// catch this surprisingly common error	447	// catch this surprisingly common error
265	if (SvROK (TOPs) && SvRV (TOPs) == sv)	448	if (SvROK (TOPs) && SvRV (TOPs) == sv)
266	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	449	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
267		450
268	sv = POPs;
269	PUTBACK;
270
271	encode_sv (enc, sv);	451	encode_sv (enc, POPs);
272		452
		453	PUTBACK;
		454
273	FREETMPS; LEAVE;	455	FREETMPS; LEAVE;
274	}
275	else if (enc->cbor.flags & F_ALLOW_BLESSED)
276	encode_str (enc, "null", 4, 0);
277	else
278	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it",
279	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
280	}	456	}
281	else if (enc->cbor.flags & F_ALLOW_BLESSED)	457	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
282	encode_str (enc, "null", 4, 0);	458	{
		459	dSP;
		460
		461	ENTER; SAVETMPS; PUSHMARK (SP);
		462	EXTEND (SP, 2);
		463	// we re-bless the reference to get overload and other niceties right
		464	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		465	PUSHs (sv_cbor);
		466
		467	PUTBACK;
		468	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		469	SPAGAIN;
		470
		471	// catch this surprisingly common error
		472	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		473	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		474
		475	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		476	encode_uint (enc, MAJOR_ARRAY, count + 1);
		477	encode_strref (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		478
		479	while (count)
		480	encode_sv (enc, SP[1 - count--]);
		481
		482	PUTBACK;
		483
		484	FREETMPS; LEAVE;
		485	}
283	else	486	else
284	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	487	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
285	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	488	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
286	#endif
287	}
288	}	489	}
289	else if (svt == SVt_PVHV)	490	else if (svt == SVt_PVHV)
290	encode_hv (enc, (HV *)sv);	491	encode_hv (enc, (HV *)sv);
291	else if (svt == SVt_PVAV)	492	else if (svt == SVt_PVAV)
292	encode_av (enc, (AV *)sv);	493	encode_av (enc, (AV *)sv);
293	else if (svt < SVt_PVAV)
294	{
295	STRLEN len = 0;
296	char *pv = svt ? SvPV (sv, len) : 0;
297
298	if (len == 1 && *pv == '1')
299	encode_ch (enc, 0xe0 | 21);
300	else if (len == 1 && *pv == '0')
301	encode_ch (enc, 0xe0 | 20);
302	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
303	encode_ch (enc, 0xe0 | 23);
304	else
305	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
306	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
307	}
308	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
309	encode_ch (enc, 0xe0 | 23);
310	else	494	else
311	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	495	{
312	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	496	encode_tag (enc, CBOR_TAG_INDIRECTION);
		497	encode_sv (enc, sv);
		498	}
313	}	499	}
314		500
315	static void	501	static void
316	encode_nv (enc_t *enc, SV *sv)	502	encode_nv (enc_t *enc, SV *sv)
317	{	503	{
318	double nv = SvNVX (sv);	504	double nv = SvNVX (sv);
319		505
320	need (enc, 9);	506	need (enc, 9);
321		507
322	if (ecb_expect_false (nv == (U32)nv))	508	if (ecb_expect_false (nv == (NV)(U32)nv))
323	encode_uint (enc, 0x00, (U32)nv);	509	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
324	//TODO: maybe I32?	510	//TODO: maybe I32?
325	else if (ecb_expect_false (nv == (float)nv))	511	else if (ecb_expect_false (nv == (float)nv))
326	{	512	{
327	uint32_t fp = ecb_float_to_binary32 (nv);	513	uint32_t fp = ecb_float_to_binary32 (nv);
328		514
329	*enc->cur++ = 0xe0 | 26;	515	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
330		516
331	if (!ecb_big_endian ())	517	if (!ecb_big_endian ())
332	fp = ecb_bswap32 (fp);	518	fp = ecb_bswap32 (fp);
333		519
334	memcpy (enc->cur, &fp, 4);	520	memcpy (enc->cur, &fp, 4);
…		…
336	}	522	}
337	else	523	else
338	{	524	{
339	uint64_t fp = ecb_double_to_binary64 (nv);	525	uint64_t fp = ecb_double_to_binary64 (nv);
340		526
341	*enc->cur++ = 0xe0 | 27;	527	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
342		528
343	if (!ecb_big_endian ())	529	if (!ecb_big_endian ())
344	fp = ecb_bswap64 (fp);	530	fp = ecb_bswap64 (fp);
345		531
346	memcpy (enc->cur, &fp, 8);	532	memcpy (enc->cur, &fp, 8);
…		…
355		541
356	if (SvPOKp (sv))	542	if (SvPOKp (sv))
357	{	543	{
358	STRLEN len;	544	STRLEN len;
359	char *str = SvPV (sv, len);	545	char *str = SvPV (sv, len);
360	encode_str (enc, SvUTF8 (sv), str, len);	546	encode_strref (enc, SvUTF8 (sv), str, len);
361	}	547	}
362	else if (SvNOKp (sv))	548	else if (SvNOKp (sv))
363	encode_nv (enc, sv);	549	encode_nv (enc, sv);
364	else if (SvIOKp (sv))	550	else if (SvIOKp (sv))
365	{	551	{
366	if (SvIsUV (sv))	552	if (SvIsUV (sv))
367	encode_uint (enc, 0x00, SvUVX (sv));	553	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
368	else if (SvIVX (sv) >= 0)	554	else if (SvIVX (sv) >= 0)
369	encode_uint (enc, 0x00, SvIVX (sv));	555	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
370	else	556	else
371	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	557	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
372	}	558	}
373	else if (SvROK (sv))	559	else if (SvROK (sv))
374	encode_rv (enc, SvRV (sv));	560	encode_rv (enc, SvRV (sv));
375	else if (!SvOK (sv))	561	else if (!SvOK (sv))
376	encode_ch (enc, 0xe0 | 22);	562	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
377	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	563	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
378	encode_ch (enc, 0xe0 | 23);	564	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
379	else	565	else
380	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	566	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
381	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	567	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
382	}	568	}
383		569
384	static SV *	570	static SV *
385	encode_cbor (SV *scalar, CBOR *cbor)	571	encode_cbor (SV *scalar, CBOR *cbor)
386	{	572	{
387	enc_t enc;	573	enc_t enc = { };
388		574
389	enc.cbor = *cbor;	575	enc.cbor = *cbor;
390	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	576	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
391	enc.cur = SvPVX (enc.sv);	577	enc.cur = SvPVX (enc.sv);
392	enc.end = SvEND (enc.sv);	578	enc.end = SvEND (enc.sv);
393	enc.depth = 0;
394		579
395	SvPOK_only (enc.sv);	580	SvPOK_only (enc.sv);
		581
		582	if (cbor->flags & F_PACK_STRINGS)
		583	{
		584	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		585	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		586	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		587	}
		588
396	encode_sv (&enc, scalar);	589	encode_sv (&enc, scalar);
397		590
398	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	591	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
399	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	592	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
400		593
…		…
414	U8 *end; // end of input string	607	U8 *end; // end of input string
415	const char *err; // parse error, if != 0	608	const char *err; // parse error, if != 0
416	CBOR cbor;	609	CBOR cbor;
417	U32 depth; // recursion depth	610	U32 depth; // recursion depth
418	U32 maxdepth; // recursion depth limit	611	U32 maxdepth; // recursion depth limit
		612	AV *shareable;
		613	AV *stringref;
		614	SV *decode_tagged;
419	} dec_t;	615	} dec_t;
420		616
421	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	617	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE
422		618
423	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	619	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")
…		…
426	#define DEC_DEC_DEPTH --dec->depth	622	#define DEC_DEC_DEPTH --dec->depth
427		623
428	static UV	624	static UV
429	decode_uint (dec_t *dec)	625	decode_uint (dec_t *dec)
430	{	626	{
431	switch (*dec->cur & 31)	627	U8 m = *dec->cur & MINOR_MASK;
432	{	628	++dec->cur;
433	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
434	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
435	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
436	return *dec->cur++ & 31;
437		629
438	case 24:	630	if (ecb_expect_true (m < LENGTH_EXT1))
		631	return m;
		632	else if (ecb_expect_true (m == LENGTH_EXT1))
		633	{
439	WANT (2);	634	WANT (1);
440	dec->cur += 2;	635	dec->cur += 1;
441	return dec->cur[-1];	636	return dec->cur[-1];
442		637	}
443	case 25:	638	else if (ecb_expect_true (m == LENGTH_EXT2))
		639	{
444	WANT (3);	640	WANT (2);
445	dec->cur += 3;	641	dec->cur += 2;
446	return (((UV)dec->cur[-2]) << 8)	642	return (((UV)dec->cur[-2]) << 8)
447	| ((UV)dec->cur[-1]);	643	| ((UV)dec->cur[-1]);
448		644	}
449	case 26:	645	else if (ecb_expect_true (m == LENGTH_EXT4))
		646	{
450	WANT (5);	647	WANT (4);
451	dec->cur += 5;	648	dec->cur += 4;
452	return (((UV)dec->cur[-4]) << 24)	649	return (((UV)dec->cur[-4]) << 24)
453	| (((UV)dec->cur[-3]) << 16)	650	| (((UV)dec->cur[-3]) << 16)
454	| (((UV)dec->cur[-2]) << 8)	651	| (((UV)dec->cur[-2]) << 8)
455	| ((UV)dec->cur[-1]);	652	| ((UV)dec->cur[-1]);
456		653	}
457	case 27:	654	else if (ecb_expect_true (m == LENGTH_EXT8))
		655	{
458	WANT (9);	656	WANT (8);
459	dec->cur += 9;	657	dec->cur += 8;
		658
		659	return
		660	#if UVSIZE < 8
		661	0
		662	#else
460	return (((UV)dec->cur[-8]) << 56)	663	(((UV)dec->cur[-8]) << 56)
461	| (((UV)dec->cur[-7]) << 48)	664	| (((UV)dec->cur[-7]) << 48)
462	| (((UV)dec->cur[-6]) << 40)	665	| (((UV)dec->cur[-6]) << 40)
463	| (((UV)dec->cur[-5]) << 32)	666	| (((UV)dec->cur[-5]) << 32)
		667	#endif
464	| (((UV)dec->cur[-4]) << 24)	668	| (((UV)dec->cur[-4]) << 24)
465	| (((UV)dec->cur[-3]) << 16)	669	| (((UV)dec->cur[-3]) << 16)
466	| (((UV)dec->cur[-2]) << 8)	670	| (((UV)dec->cur[-2]) << 8)
467	| ((UV)dec->cur[-1]);	671	| ((UV)dec->cur[-1]);
468		672	}
469	default:	673	else
470	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	674	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
471	}
472		675
473	fail:	676	fail:
474	return 0;	677	return 0;
475	}	678	}
476		679
…		…
481	{	684	{
482	AV *av = newAV ();	685	AV *av = newAV ();
483		686
484	DEC_INC_DEPTH;	687	DEC_INC_DEPTH;
485		688
486	if ((*dec->cur & 31) == 31)	689	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
487	{	690	{
488	++dec->cur;	691	++dec->cur;
489		692
490	for (;;)	693	for (;;)
491	{	694	{
492	WANT (1);	695	WANT (1);
493		696
494	if (*dec->cur == (0xe0 | 31))	697	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
495	{	698	{
496	++dec->cur;	699	++dec->cur;
497	break;	700	break;
498	}	701	}
499		702
…		…
502	}	705	}
503	else	706	else
504	{	707	{
505	int i, len = decode_uint (dec);	708	int i, len = decode_uint (dec);
506		709
		710	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
507	av_fill (av, len - 1);	711	av_fill (av, len - 1);
508		712
509	for (i = 0; i < len; ++i)	713	for (i = 0; i < len; ++i)
510	AvARRAY (av)[i] = decode_sv (dec);	714	AvARRAY (av)[i] = decode_sv (dec);
511	}	715	}
…		…
517	SvREFCNT_dec (av);	721	SvREFCNT_dec (av);
518	DEC_DEC_DEPTH;	722	DEC_DEC_DEPTH;
519	return &PL_sv_undef;	723	return &PL_sv_undef;
520	}	724	}
521		725
		726	static void
		727	decode_he (dec_t *dec, HV *hv)
		728	{
		729	// for speed reasons, we specialcase single-string
		730	// byte or utf-8 strings as keys, but only when !stringref
		731
		732	if (ecb_expect_true (!dec->stringref))
		733	if (ecb_expect_true ((*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		734	{
		735	I32 len = decode_uint (dec);
		736	char *key = (char *)dec->cur;
		737
		738	dec->cur += len;
		739
		740	if (ecb_expect_false (dec->stringref))
		741	av_push (dec->stringref, newSVpvn (key, len));
		742
		743	hv_store (hv, key, len, decode_sv (dec), 0);
		744
		745	return;
		746	}
		747	else if (ecb_expect_true ((*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		748	{
		749	I32 len = decode_uint (dec);
		750	char *key = (char *)dec->cur;
		751
		752	dec->cur += len;
		753
		754	if (ecb_expect_false (dec->stringref))
		755	av_push (dec->stringref, newSVpvn_utf8 (key, len, 1));
		756
		757	hv_store (hv, key, -len, decode_sv (dec), 0);
		758
		759	return;
		760	}
		761
		762	SV *k = decode_sv (dec);
		763	SV *v = decode_sv (dec);
		764
		765	hv_store_ent (hv, k, v, 0);
		766	SvREFCNT_dec (k);
		767	}
		768
522	static SV *	769	static SV *
523	decode_hv (dec_t *dec)	770	decode_hv (dec_t *dec)
524	{	771	{
525	HV *hv = newHV ();	772	HV *hv = newHV ();
526		773
527	DEC_INC_DEPTH;	774	DEC_INC_DEPTH;
528		775
529	if ((*dec->cur & 31) == 31)	776	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
530	{	777	{
531	++dec->cur;	778	++dec->cur;
532		779
533	for (;;)	780	for (;;)
534	{	781	{
535	WANT (1);	782	WANT (1);
536		783
537	if (*dec->cur == (0xe0 | 31))	784	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
538	{	785	{
539	++dec->cur;	786	++dec->cur;
540	break;	787	break;
541	}	788	}
542		789
543	SV *k = decode_sv (dec);	790	decode_he (dec, hv);
544	SV *v = decode_sv (dec);
545
546	hv_store_ent (hv, k, v, 0);
547	}	791	}
548	}	792	}
549	else	793	else
550	{	794	{
551	int len = decode_uint (dec);	795	int pairs = decode_uint (dec);
552		796
553	while (len--)	797	while (pairs--)
554	{	798	decode_he (dec, hv);
555	SV *k = decode_sv (dec);
556	SV *v = decode_sv (dec);
557
558	hv_store_ent (hv, k, v, 0);
559	}
560	}	799	}
561		800
562	DEC_DEC_DEPTH;	801	DEC_DEC_DEPTH;
563	return newRV_noinc ((SV *)hv);	802	return newRV_noinc ((SV *)hv);
564
565	#if 0
566	SV *sv;
567	HV *hv = newHV ();
568
569	DEC_INC_DEPTH;
570	decode_ws (dec);
571
572	for (;;)
573	{
574	// heuristic: assume that
575	// a) decode_str + hv_store_ent are abysmally slow.
576	// b) most hash keys are short, simple ascii text.
577	// => try to "fast-match" such strings to avoid
578	// the overhead of decode_str + hv_store_ent.
579	{
580	SV *value;
581	char *p = dec->cur;
582	char *e = p + 24; // only try up to 24 bytes
583
584	for (;;)
585	{
586	// the >= 0x80 is false on most architectures
587	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
588	{
589	// slow path, back up and use decode_str
590	SV *key = decode_str (dec);
591	if (!key)
592	goto fail;
593
594	decode_ws (dec); EXPECT_CH (':');
595
596	decode_ws (dec);
597	value = decode_sv (dec);
598	if (!value)
599	{
600	SvREFCNT_dec (key);
601	goto fail;
602	}
603
604	hv_store_ent (hv, key, value, 0);
605	SvREFCNT_dec (key);
606
607	break;
608	}
609	else if (*p == '"')
610	{
611	// fast path, got a simple key
612	char *key = dec->cur;
613	int len = p - key;
614	dec->cur = p + 1;
615
616	decode_ws (dec); EXPECT_CH (':');
617
618	decode_ws (dec);
619	value = decode_sv (dec);
620	if (!value)
621	goto fail;
622
623	hv_store (hv, key, len, value, 0);
624
625	break;
626	}
627
628	++p;
629	}
630	}
631
632	decode_ws (dec);
633
634	if (*dec->cur == '}')
635	{
636	++dec->cur;
637	break;
638	}
639
640	if (*dec->cur != ',')
641	ERR (", or } expected while parsing object/hash");
642
643	++dec->cur;
644
645	decode_ws (dec);
646
647	if (*dec->cur == '}' && dec->cbor.flags & F_RELAXED)
648	{
649	++dec->cur;
650	break;
651	}
652	}
653
654	DEC_DEC_DEPTH;
655	sv = newRV_noinc ((SV *)hv);
656
657	// check filter callbacks
658	if (dec->cbor.flags & F_HOOK)
659	{
660	if (dec->cbor.cb_sk_object && HvKEYS (hv) == 1)
661	{
662	HE *cb, *he;
663
664	hv_iterinit (hv);
665	he = hv_iternext (hv);
666	hv_iterinit (hv);
667
668	// the next line creates a mortal sv each time its called.
669	// might want to optimise this for common cases.
670	cb = hv_fetch_ent (dec->cbor.cb_sk_object, hv_iterkeysv (he), 0, 0);
671
672	if (cb)
673	{
674	dSP;
675	int count;
676
677	ENTER; SAVETMPS; PUSHMARK (SP);
678	XPUSHs (HeVAL (he));
679	sv_2mortal (sv);
680
681	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
682
683	if (count == 1)
684	{
685	sv = newSVsv (POPs);
686	FREETMPS; LEAVE;
687	return sv;
688	}
689
690	SvREFCNT_inc (sv);
691	FREETMPS; LEAVE;
692	}
693	}
694
695	if (dec->cbor.cb_object)
696	{
697	dSP;
698	int count;
699
700	ENTER; SAVETMPS; PUSHMARK (SP);
701	XPUSHs (sv_2mortal (sv));
702
703	PUTBACK; count = call_sv (dec->cbor.cb_object, G_ARRAY); SPAGAIN;
704
705	if (count == 1)
706	{
707	sv = newSVsv (POPs);
708	FREETMPS; LEAVE;
709	return sv;
710	}
711
712	SvREFCNT_inc (sv);
713	FREETMPS; LEAVE;
714	}
715	}
716
717	return sv;
718	#endif
719		803
720	fail:	804	fail:
721	SvREFCNT_dec (hv);	805	SvREFCNT_dec (hv);
722	DEC_DEC_DEPTH;	806	DEC_DEC_DEPTH;
723	return &PL_sv_undef;	807	return &PL_sv_undef;
724	}	808	}
725		809
726	static SV *	810	static SV *
727	decode_str (dec_t *dec, int utf8)	811	decode_str (dec_t *dec, int utf8)
728	{	812	{
729	SV *sv;	813	SV *sv = 0;
730		814
731	if ((*dec->cur & 31) == 31)	815	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
732	{	816	{
		817	// indefinite length strings
733	++dec->cur;	818	++dec->cur;
734		819
		820	U8 major = *dec->cur & MAJOR_MISC;
		821
735	sv = newSVpvn ("", 0);	822	sv = newSVpvn ("", 0);
736		823
737	// not very fast, and certainly not robust against illegal input
738	for (;;)	824	for (;;)
739	{	825	{
740	WANT (1);	826	WANT (1);
741		827
742	if (*dec->cur == (0xe0 | 31))	828	if ((*dec->cur - major) > LENGTH_EXT8)
		829	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
743	{	830	{
744	++dec->cur;	831	++dec->cur;
745	break;	832	break;
746	}	833	}
		834	else
		835	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
747		836
748	SV *sv2 = decode_sv (dec);	837	STRLEN len = decode_uint (dec);
749	sv_catsv (sv, sv2);	838
		839	WANT (len);
		840	sv_catpvn (sv, dec->cur, len);
		841	dec->cur += len;
750	}	842	}
751	}	843	}
752	else	844	else
753	{	845	{
754	STRLEN len = decode_uint (dec);	846	STRLEN len = decode_uint (dec);
755		847
756	WANT (len);	848	WANT (len);
757	sv = newSVpvn (dec->cur, len);	849	sv = newSVpvn (dec->cur, len);
758	dec->cur += len;	850	dec->cur += len;
		851
		852	if (ecb_expect_false (dec->stringref)
		853	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		854	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
759	}	855	}
760		856
761	if (utf8)	857	if (utf8)
762	SvUTF8_on (sv);	858	SvUTF8_on (sv);
763		859
764	return sv;	860	return sv;
765		861
766	fail:	862	fail:
		863	SvREFCNT_dec (sv);
767	return &PL_sv_undef;	864	return &PL_sv_undef;
768	}	865	}
769		866
770	static SV *	867	static SV *
771	decode_tagged (dec_t *dec)	868	decode_tagged (dec_t *dec)
772	{	869	{
		870	SV *sv = 0;
773	UV tag = decode_uint (dec);	871	UV tag = decode_uint (dec);
		872
		873	WANT (1);
		874
		875	switch (tag)
		876	{
		877	case CBOR_TAG_MAGIC:
		878	sv = decode_sv (dec);
		879	break;
		880
		881	case CBOR_TAG_INDIRECTION:
		882	sv = newRV_noinc (decode_sv (dec));
		883	break;
		884
		885	case CBOR_TAG_STRINGREF_NAMESPACE:
		886	{
		887	ENTER; SAVETMPS;
		888
		889	SAVESPTR (dec->stringref);
		890	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		891
		892	sv = decode_sv (dec);
		893
		894	FREETMPS; LEAVE;
		895	}
		896	break;
		897
		898	case CBOR_TAG_STRINGREF:
		899	{
		900	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		901	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		902
		903	UV idx = decode_uint (dec);
		904
		905	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		906	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		907
		908	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		909	}
		910	break;
		911
		912	case CBOR_TAG_VALUE_SHAREABLE:
		913	{
		914	if (ecb_expect_false (!dec->shareable))
		915	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		916
		917	sv = newSV (0);
		918	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		919
774	SV *sv = decode_sv (dec);	920	SV *osv = decode_sv (dec);
		921	sv_setsv (sv, osv);
		922	SvREFCNT_dec_NN (osv);
		923	}
		924	break;
775		925
776	if (tag == 55799) // 2.4.5 Self-Describe CBOR	926	case CBOR_TAG_VALUE_SHAREDREF:
		927	{
		928	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		929	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		930
		931	UV idx = decode_uint (dec);
		932
		933	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		934	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		935
		936	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		937	}
		938	break;
		939
		940	case CBOR_TAG_PERL_OBJECT:
		941	{
		942	sv = decode_sv (dec);
		943
		944	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		945	ERR ("corrupted CBOR data (non-array perl object)");
		946
		947	AV *av = (AV *)SvRV (sv);
		948	int len = av_len (av) + 1;
		949	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		950
		951	if (!stash)
		952	ERR ("cannot decode perl-object (package does not exist)");
		953
		954	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		955
		956	if (!method)
		957	ERR ("cannot decode perl-object (package does not have a THAW method)");
		958
		959	dSP;
		960
		961	ENTER; SAVETMPS; PUSHMARK (SP);
		962	EXTEND (SP, len + 1);
		963	// we re-bless the reference to get overload and other niceties right
		964	PUSHs (*av_fetch (av, 0, 1));
		965	PUSHs (sv_cbor);
		966
		967	int i;
		968
		969	for (i = 1; i < len; ++i)
		970	PUSHs (*av_fetch (av, i, 1));
		971
		972	PUTBACK;
		973	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		974	SPAGAIN;
		975
		976	if (SvTRUE (ERRSV))
		977	{
		978	FREETMPS; LEAVE;
		979	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		980	}
		981
		982	SvREFCNT_dec (sv);
		983	sv = SvREFCNT_inc (POPs);
		984
		985	PUTBACK;
		986
		987	FREETMPS; LEAVE;
		988	}
		989	break;
		990
		991	default:
		992	{
		993	sv = decode_sv (dec);
		994
		995	dSP;
		996	ENTER; SAVETMPS; PUSHMARK (SP);
		997	EXTEND (SP, 2);
		998	PUSHs (newSVuv (tag));
		999	PUSHs (sv);
		1000
		1001	PUTBACK;
		1002	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | 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	if (count)
		1012	{
		1013	SvREFCNT_dec (sv);
		1014	sv = SvREFCNT_inc (POPs);
		1015	}
		1016	else
		1017	{
		1018	AV *av = newAV ();
		1019	av_push (av, newSVuv (tag));
		1020	av_push (av, sv);
		1021
		1022	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1023	? cbor_tagged_stash
		1024	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1025	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1026	}
		1027
		1028	PUTBACK;
		1029
		1030	FREETMPS; LEAVE;
		1031	}
		1032	break;
		1033	}
		1034
777	return sv;	1035	return sv;
778		1036
779	AV *av = newAV ();	1037	fail:
780	av_push (av, newSVuv (tag));	1038	SvREFCNT_dec (sv);
781	av_push (av, sv);	1039	return &PL_sv_undef;
782	return newRV_noinc ((SV *)av);
783	}	1040	}
784		1041
785	static SV *	1042	static SV *
786	decode_sv (dec_t *dec)	1043	decode_sv (dec_t *dec)
787	{	1044	{
788	WANT (1);	1045	WANT (1);
789		1046
790	switch (*dec->cur >> 5)	1047	switch (*dec->cur >> MAJOR_SHIFT)
791	{	1048	{
792	case 0: // unsigned int	1049	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
793	//TODO: 64 bit values on 3 2bit perls	1050	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
794	return newSVuv (decode_uint (dec));	1051	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
795	case 1: // negative int	1052	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
796	return newSViv (-1 - (IV)decode_uint (dec));	1053	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
797	case 2: // octet string	1054	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
798	return decode_str (dec, 0);	1055	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
799	case 3: // utf-8 string	1056
800	return decode_str (dec, 1);	1057	case MAJOR_MISC >> MAJOR_SHIFT:
801	case 4: // array
802	return decode_av (dec);
803	case 5: // map
804	return decode_hv (dec);
805	case 6: // tag
806	return decode_tagged (dec);
807	case 7: // misc
808	switch (*dec->cur++ & 31)	1058	switch (*dec->cur++ & MINOR_MASK)
809	{	1059	{
810	case 20:	1060	case SIMPLE_FALSE:
811	#if CBOR_SLOW	1061	#if CBOR_SLOW
812	cbor_false = get_bool ("CBOR::XS::false");	1062	types_false = get_bool ("Types::Serialiser::false");
813	#endif	1063	#endif
814	return newSVsv (cbor_false);	1064	return newSVsv (types_false);
815	case 21:	1065	case SIMPLE_TRUE:
816	#if CBOR_SLOW	1066	#if CBOR_SLOW
817	cbor_true = get_bool ("CBOR::XS::true");	1067	types_true = get_bool ("Types::Serialiser::true");
818	#endif	1068	#endif
819	return newSVsv (cbor_true);	1069	return newSVsv (types_true);
820	case 22:	1070	case SIMPLE_NULL:
821	return newSVsv (&PL_sv_undef);	1071	return newSVsv (&PL_sv_undef);
		1072	case SIMPLE_UNDEF:
		1073	#if CBOR_SLOW
		1074	types_error = get_bool ("Types::Serialiser::error");
		1075	#endif
		1076	return newSVsv (types_error);
822		1077
823	case 25:	1078	case MISC_FLOAT16:
824	{	1079	{
825	WANT (2);	1080	WANT (2);
826		1081
827	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1082	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
828	dec->cur += 2;	1083	dec->cur += 2;
829		1084
830	return newSVnv (ecb_binary16_to_float (fp));	1085	return newSVnv (ecb_binary16_to_float (fp));
831	}	1086	}
832		1087
833	case 26:	1088	case MISC_FLOAT32:
834	{	1089	{
835	uint32_t fp;	1090	uint32_t fp;
836	WANT (4);	1091	WANT (4);
837	memcpy (&fp, dec->cur, 4);	1092	memcpy (&fp, dec->cur, 4);
838	dec->cur += 4;	1093	dec->cur += 4;
…		…
841	fp = ecb_bswap32 (fp);	1096	fp = ecb_bswap32 (fp);
842		1097
843	return newSVnv (ecb_binary32_to_float (fp));	1098	return newSVnv (ecb_binary32_to_float (fp));
844	}	1099	}
845		1100
846	case 27:	1101	case MISC_FLOAT64:
847	{	1102	{
848	uint64_t fp;	1103	uint64_t fp;
849	WANT (8);	1104	WANT (8);
850	memcpy (&fp, dec->cur, 8);	1105	memcpy (&fp, dec->cur, 8);
851	dec->cur += 8;	1106	dec->cur += 8;
…		…
854	fp = ecb_bswap64 (fp);	1109	fp = ecb_bswap64 (fp);
855		1110
856	return newSVnv (ecb_binary64_to_double (fp));	1111	return newSVnv (ecb_binary64_to_double (fp));
857	}	1112	}
858		1113
859	// 0..19 unassigned	1114	// 0..19 unassigned simple
860	// 24 reserved + unassigned (reserved values are not encodable)	1115	// 24 reserved + unassigned (reserved values are not encodable)
861	default:	1116	default:
862	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1117	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");
863	}	1118	}
864		1119
865	break;	1120	break;
866	}	1121	}
867	#if 0
868	switch (*dec->cur)
869	{
870	//case '"': ++dec->cur; return decode_str (dec);
871	case '[': ++dec->cur; return decode_av (dec);
872	case '{': ++dec->cur; return decode_hv (dec);
873
874	case '-':
875	case '0': case '1': case '2': case '3': case '4':
876	case '5': case '6': case '7': case '8': case '9':
877	//TODO return decode_num (dec);
878
879	case 't':
880	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
881	{
882	dec->cur += 4;
883	#if CBOR_SLOW
884	cbor_true = get_bool ("CBOR::XS::true");
885	#endif
886	return newSVsv (cbor_true);
887	}
888	else
889	ERR ("'true' expected");
890
891	break;
892
893	case 'f':
894	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
895	{
896	dec->cur += 5;
897	#if CBOR_SLOW
898	cbor_false = get_bool ("CBOR::XS::false");
899	#endif
900	return newSVsv (cbor_false);
901	}
902	else
903	ERR ("'false' expected");
904
905	break;
906
907	case 'n':
908	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
909	{
910	dec->cur += 4;
911	return newSVsv (&PL_sv_undef);
912	}
913	else
914	ERR ("'null' expected");
915
916	break;
917
918	default:
919	ERR ("malformed CBOR string, neither array, object, number, string or atom");
920	break;
921	}
922	#endif
923		1122
924	fail:	1123	fail:
925	return &PL_sv_undef;	1124	return &PL_sv_undef;
926	}	1125	}
927		1126
928	static SV *	1127	static SV *
929	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1128	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
930	{	1129	{
931	dec_t dec;	1130	dec_t dec = { };
932	SV *sv;	1131	SV *sv;
		1132	STRLEN len;
		1133	char *data = SvPVbyte (string, len);
933		1134
934	/* work around bugs in 5.10 where manipulating magic values
935	* makes perl ignore the magic in subsequent accesses.
936	* also make a copy of non-PV values, to get them into a clean
937	* state (SvPV should do that, but it's buggy, see below).
938	*/
939	/*SvGETMAGIC (string);*/
940	if (SvMAGICAL (string) || !SvPOK (string))
941	string = sv_2mortal (newSVsv (string));
942
943	SvUPGRADE (string, SVt_PV);
944
945	/* work around a bug in perl 5.10, which causes SvCUR to fail an
946	* assertion with -DDEBUGGING, although SvCUR is documented to
947	* return the xpv_cur field which certainly exists after upgrading.
948	* according to nicholas clark, calling SvPOK fixes this.
949	* But it doesn't fix it, so try another workaround, call SvPV_nolen
950	* and hope for the best.
951	* Damnit, SvPV_nolen still trips over yet another assertion. This
952	* assertion business is seriously broken, try yet another workaround
953	* for the broken -DDEBUGGING.
954	*/
955	{
956	#ifdef DEBUGGING
957	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
958	#else
959	STRLEN offset = SvCUR (string);
960	#endif
961
962	if (offset > cbor->max_size && cbor->max_size)	1135	if (len > cbor->max_size && cbor->max_size)
963	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1136	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
964	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1137	(unsigned long)len, (unsigned long)cbor->max_size);
965	}
966
967	sv_utf8_downgrade (string, 0);
968		1138
969	dec.cbor = *cbor;	1139	dec.cbor = *cbor;
970	dec.cur = (U8 *)SvPVX (string);	1140	dec.cur = (U8 *)data;
971	dec.end = (U8 *)SvEND (string);	1141	dec.end = (U8 *)data + len;
972	dec.err = 0;
973	dec.depth = 0;
974
975	if (dec.cbor.cb_object || dec.cbor.cb_sk_object)
976	;//TODO dec.cbor.flags |= F_HOOK;
977		1142
978	sv = decode_sv (&dec);	1143	sv = decode_sv (&dec);
979		1144
980	if (offset_return)	1145	if (offset_return)
981	*offset_return = dec.cur;	1146	*offset_return = dec.cur;
…		…
985	dec.err = "garbage after CBOR object";	1150	dec.err = "garbage after CBOR object";
986		1151
987	if (dec.err)	1152	if (dec.err)
988	{	1153	{
989	SvREFCNT_dec (sv);	1154	SvREFCNT_dec (sv);
990	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1155	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
991	}	1156	}
992		1157
993	sv = sv_2mortal (sv);	1158	sv = sv_2mortal (sv);
994		1159
995	return sv;	1160	return sv;
…		…
1001	MODULE = CBOR::XS PACKAGE = CBOR::XS	1166	MODULE = CBOR::XS PACKAGE = CBOR::XS
1002		1167
1003	BOOT:	1168	BOOT:
1004	{	1169	{
1005	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1170	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1006	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1171	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1007		1172
1008	cbor_true = get_bool ("CBOR::XS::true");	1173	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1009	cbor_false = get_bool ("CBOR::XS::false");	1174	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1175
		1176	types_true = get_bool ("Types::Serialiser::true" );
		1177	types_false = get_bool ("Types::Serialiser::false");
		1178	types_error = get_bool ("Types::Serialiser::error");
		1179
		1180	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1181
		1182	sv_cbor = newSVpv ("CBOR", 0);
		1183	SvREADONLY_on (sv_cbor);
1010	}	1184	}
1011		1185
1012	PROTOTYPES: DISABLE	1186	PROTOTYPES: DISABLE
1013		1187
1014	void CLONE (...)	1188	void CLONE (...)
1015	CODE:	1189	CODE:
1016	cbor_stash = 0;	1190	cbor_stash = 0;
		1191	cbor_tagged_stash = 0;
		1192	types_error_stash = 0;
1017	cbor_boolean_stash = 0;	1193	types_boolean_stash = 0;
1018		1194
1019	void new (char *klass)	1195	void new (char *klass)
1020	PPCODE:	1196	PPCODE:
1021	{	1197	{
1022	SV *pv = NEWSV (0, sizeof (CBOR));	1198	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1030		1206
1031	void shrink (CBOR *self, int enable = 1)	1207	void shrink (CBOR *self, int enable = 1)
1032	ALIAS:	1208	ALIAS:
1033	shrink = F_SHRINK	1209	shrink = F_SHRINK
1034	allow_unknown = F_ALLOW_UNKNOWN	1210	allow_unknown = F_ALLOW_UNKNOWN
		1211	allow_sharing = F_ALLOW_SHARING
		1212	pack_strings = F_PACK_STRINGS
1035	PPCODE:	1213	PPCODE:
1036	{	1214	{
1037	if (enable)	1215	if (enable)
1038	self->flags |= ix;	1216	self->flags |= ix;
1039	else	1217	else
…		…
1044		1222
1045	void get_shrink (CBOR *self)	1223	void get_shrink (CBOR *self)
1046	ALIAS:	1224	ALIAS:
1047	get_shrink = F_SHRINK	1225	get_shrink = F_SHRINK
1048	get_allow_unknown = F_ALLOW_UNKNOWN	1226	get_allow_unknown = F_ALLOW_UNKNOWN
		1227	get_allow_sharing = F_ALLOW_SHARING
		1228	get_pack_strings = F_PACK_STRINGS
1049	PPCODE:	1229	PPCODE:
1050	XPUSHs (boolSV (self->flags & ix));	1230	XPUSHs (boolSV (self->flags & ix));
1051		1231
1052	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1232	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1053	PPCODE:	1233	PPCODE:
…		…
1069	CODE:	1249	CODE:
1070	RETVAL = self->max_size;	1250	RETVAL = self->max_size;
1071	OUTPUT:	1251	OUTPUT:
1072	RETVAL	1252	RETVAL
1073		1253
1074	#if 0 //TODO	1254	void filter (CBOR *self, SV *filter = 0)
1075
1076	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1077	PPCODE:	1255	PPCODE:
1078	{
1079	SvREFCNT_dec (self->cb_object);	1256	SvREFCNT_dec (self->filter);
1080	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1257	self->filter = filter ? newSVsv (filter) : filter;
1081
1082	XPUSHs (ST (0));	1258	XPUSHs (ST (0));
1083	}
1084		1259
1085	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1260	SV *get_filter (CBOR *self)
1086	PPCODE:	1261	CODE:
1087	{	1262	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1088	if (!self->cb_sk_object)	1263	OUTPUT:
1089	self->cb_sk_object = newHV ();	1264	RETVAL
1090
1091	if (SvOK (cb))
1092	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1093	else
1094	{
1095	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1096
1097	if (!HvKEYS (self->cb_sk_object))
1098	{
1099	SvREFCNT_dec (self->cb_sk_object);
1100	self->cb_sk_object = 0;
1101	}
1102	}
1103
1104	XPUSHs (ST (0));
1105	}
1106
1107	#endif
1108		1265
1109	void encode (CBOR *self, SV *scalar)	1266	void encode (CBOR *self, SV *scalar)
1110	PPCODE:	1267	PPCODE:
1111	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1268	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1112	XPUSHs (scalar);	1269	XPUSHs (scalar);
…		…
1126	PUSHs (sv);	1283	PUSHs (sv);
1127	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1284	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1128	}	1285	}
1129		1286
1130	void DESTROY (CBOR *self)	1287	void DESTROY (CBOR *self)
1131	CODE:	1288	PPCODE:
1132	SvREFCNT_dec (self->cb_sk_object);	1289	cbor_free (self);
1133	SvREFCNT_dec (self->cb_object);
1134		1290
1135	PROTOTYPES: ENABLE	1291	PROTOTYPES: ENABLE
1136		1292
1137	void encode_cbor (SV *scalar)	1293	void encode_cbor (SV *scalar)
		1294	ALIAS:
		1295	encode_cbor = 0
		1296	encode_cbor_sharing = F_ALLOW_SHARING
1138	PPCODE:	1297	PPCODE:
1139	{	1298	{
1140	CBOR cbor;	1299	CBOR cbor;
1141	cbor_init (&cbor);	1300	cbor_init (&cbor);
		1301	cbor.flags |= ix;
1142	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1302	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1143	XPUSHs (scalar);	1303	XPUSHs (scalar);
1144	}	1304	}
1145		1305
1146	void decode_cbor (SV *cborstr)	1306	void decode_cbor (SV *cborstr)

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