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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 1.50 by root, Thu Feb 25 02:29:22 2016 UTC

…		…
7	#include <stdlib.h>	7	#include <stdlib.h>
8	#include <stdio.h>	8	#include <stdio.h>
9	#include <limits.h>	9	#include <limits.h>
10	#include <float.h>	10	#include <float.h>
11		11
		12	#define ECB_NO_THREADS 1
12	#include "ecb.h"	13	#include "ecb.h"
13		14
		15	// compatibility with perl <5.18
		16	#ifndef HvNAMELEN_get
		17	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		18	#endif
		19	#ifndef HvNAMELEN
		20	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		21	#endif
		22	#ifndef HvNAMEUTF8
		23	# define HvNAMEUTF8(hv) 0
		24	#endif
		25	#ifndef SvREFCNT_dec_NN
		26	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		27	#endif
		28
		29	// known major and minor types
		30	enum cbor_type
		31	{
		32	MAJOR_SHIFT = 5,
		33	MINOR_MASK = 0x1f,
		34
		35	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		36	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		37	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		38	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		39	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		40	MAJOR_MAP = 5 << MAJOR_SHIFT,
		41	MAJOR_TAG = 6 << MAJOR_SHIFT,
		42	MAJOR_MISC = 7 << MAJOR_SHIFT,
		43
		44	// INT/STRING/ARRAY/MAP subtypes
		45	LENGTH_EXT1 = 24,
		46	LENGTH_EXT2 = 25,
		47	LENGTH_EXT4 = 26,
		48	LENGTH_EXT8 = 27,
		49
		50	// SIMPLE types (effectively MISC subtypes)
		51	SIMPLE_FALSE = 20,
		52	SIMPLE_TRUE = 21,
		53	SIMPLE_NULL = 22,
		54	SIMPLE_UNDEF = 23,
		55
		56	// MISC subtype (unused)
		57	MISC_EXT1 = 24,
		58	MISC_FLOAT16 = 25,
		59	MISC_FLOAT32 = 26,
		60	MISC_FLOAT64 = 27,
		61
		62	// BYTES/TEXT/ARRAY/MAP
		63	MINOR_INDEF = 31,
		64	};
		65
		66	// known tags
		67	enum cbor_tag
		68	{
		69	// extensions
		70	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
		71	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
		72	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
		73	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
		74	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
		75	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
		76	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
		77
		78	// rfc7049
		79	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
		80	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
		81	CBOR_TAG_POS_BIGNUM = 2, // byte string
		82	CBOR_TAG_NEG_BIGNUM = 3, // byte string
		83	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
		84	CBOR_TAG_BIGFLOAT = 5, // array
		85
		86	CBOR_TAG_CONV_B64U = 21, // base64url, any
		87	CBOR_TAG_CONV_B64 = 22, // base64, any
		88	CBOR_TAG_CONV_HEX = 23, // base16, any
		89	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
		90
		91	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
		92	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
		93	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
		94	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
		95	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
		96
		97	CBOR_TAG_MAGIC = 55799, // self-describe cbor
		98	};
		99
14	#define F_SHRINK 0x00000200UL	100	#define F_SHRINK 0x00000001UL
15	#define F_ALLOW_UNKNOWN 0x00002000UL	101	#define F_ALLOW_UNKNOWN 0x00000002UL
		102	#define F_ALLOW_SHARING 0x00000004UL
		103	#define F_ALLOW_CYCLES 0x00000008UL
		104	#define F_PACK_STRINGS 0x00000010UL
		105	#define F_VALIDATE_UTF8 0x00000020UL
16		106
17	#define INIT_SIZE 32 // initial scalar size to be allocated	107	#define INIT_SIZE 32 // initial scalar size to be allocated
18		108
19	#define SB do {	109	#define SB do {
20	#define SE } while (0)	110	#define SE } while (0)
…		…
31	#else	121	#else
32	# define CBOR_SLOW 0	122	# define CBOR_SLOW 0
33	# define CBOR_STASH cbor_stash	123	# define CBOR_STASH cbor_stash
34	#endif	124	#endif
35		125
36	static HV *cbor_stash, *cbor_boolean_stash; // CBOR::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;
43		134
44	SV *cb_object;	135	// for the incremental parser
45	HV *cb_sk_object;	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.
46	} CBOR;	139	} CBOR;
47		140
48	ecb_inline void	141	ecb_inline void
49	cbor_init (CBOR *cbor)	142	cbor_init (CBOR *cbor)
50	{	143	{
51	Zero (cbor, 1, CBOR);	144	Zero (cbor, 1, CBOR);
52	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);
53	}	153	}
54		154
55	/////////////////////////////////////////////////////////////////////////////	155	/////////////////////////////////////////////////////////////////////////////
56	// utility functions	156	// utility functions
57		157
…		…
79	SvPV_renew (sv, SvCUR (sv) + 1);	179	SvPV_renew (sv, SvCUR (sv) + 1);
80	#endif	180	#endif
81	}	181	}
82	}	182	}
83		183
84	/////////////////////////////////////////////////////////////////////////////	184	// minimum length of a string to be registered for stringref
85	// fp hell	185	ecb_inline int
86		186	minimum_string_length (UV idx)
87	//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	}
88		198
89	/////////////////////////////////////////////////////////////////////////////	199	/////////////////////////////////////////////////////////////////////////////
90	// encoder	200	// encoder
91		201
92	// structure used for encoding CBOR	202	// structure used for encoding CBOR
…		…
95	char *cur; // SvPVX (sv) + current output position	205	char *cur; // SvPVX (sv) + current output position
96	char *end; // SvEND (sv)	206	char *end; // SvEND (sv)
97	SV *sv; // result scalar	207	SV *sv; // result scalar
98	CBOR cbor;	208	CBOR cbor;
99	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;
100	} enc_t;	214	} enc_t;
101		215
102	ecb_inline void	216	ecb_inline void
103	need (enc_t *enc, STRLEN len)	217	need (enc_t *enc, STRLEN len)
104	{	218	{
…		…
121	static void	235	static void
122	encode_uint (enc_t *enc, int major, UV len)	236	encode_uint (enc_t *enc, int major, UV len)
123	{	237	{
124	need (enc, 9);	238	need (enc, 9);
125		239
126	if (len < 24)	240	if (ecb_expect_true (len < LENGTH_EXT1))
127	*enc->cur++ = major | len;	241	*enc->cur++ = major | len;
128	else if (len <= 0xff)	242	else if (ecb_expect_true (len <= 0xffU))
129	{	243	{
130	*enc->cur++ = major | 24;	244	*enc->cur++ = major | LENGTH_EXT1;
131	*enc->cur++ = len;	245	*enc->cur++ = len;
132	}	246	}
133	else if (len <= 0xffff)	247	else if (len <= 0xffffU)
134	{	248	{
135	*enc->cur++ = major | 25;	249	*enc->cur++ = major | LENGTH_EXT2;
136	*enc->cur++ = len >> 8;	250	*enc->cur++ = len >> 8;
137	*enc->cur++ = len;	251	*enc->cur++ = len;
138	}	252	}
139	else if (len <= 0xffffffff)	253	else if (len <= 0xffffffffU)
140	{	254	{
141	*enc->cur++ = major | 26;	255	*enc->cur++ = major | LENGTH_EXT4;
142	*enc->cur++ = len >> 24;	256	*enc->cur++ = len >> 24;
143	*enc->cur++ = len >> 16;	257	*enc->cur++ = len >> 16;
144	*enc->cur++ = len >> 8;	258	*enc->cur++ = len >> 8;
145	*enc->cur++ = len;	259	*enc->cur++ = len;
146	}	260	}
147	else	261	else
148	{	262	{
149	*enc->cur++ = major | 27;	263	*enc->cur++ = major | LENGTH_EXT8;
150	*enc->cur++ = len >> 56;	264	*enc->cur++ = len >> 56;
151	*enc->cur++ = len >> 48;	265	*enc->cur++ = len >> 48;
152	*enc->cur++ = len >> 40;	266	*enc->cur++ = len >> 40;
153	*enc->cur++ = len >> 32;	267	*enc->cur++ = len >> 32;
154	*enc->cur++ = len >> 24;	268	*enc->cur++ = len >> 24;
…		…
156	*enc->cur++ = len >> 8;	270	*enc->cur++ = len >> 8;
157	*enc->cur++ = len;	271	*enc->cur++ = len;
158	}	272	}
159	}	273	}
160		274
161	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
162	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	282	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)
163	{	283	{
164	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	284	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
165	need (enc, len);	285	need (enc, len);
166	memcpy (enc->cur, str, len);	286	memcpy (enc->cur, str, len);
167	enc->cur += len;	287	enc->cur += len;
168	}	288	}
169		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
170	static void encode_sv (enc_t *enc, SV *sv);	315	static void encode_sv (enc_t *enc, SV *sv);
171		316
172	static void	317	static void
173	encode_av (enc_t *enc, AV *av)	318	encode_av (enc_t *enc, AV *av)
174	{	319	{
…		…
177	if (enc->depth >= enc->cbor.max_depth)	322	if (enc->depth >= enc->cbor.max_depth)
178	croak (ERR_NESTING_EXCEEDED);	323	croak (ERR_NESTING_EXCEEDED);
179		324
180	++enc->depth;	325	++enc->depth;
181		326
182	encode_uint (enc, 0x80, len + 1);	327	encode_uint (enc, MAJOR_ARRAY, len + 1);
183		328
		329	if (SvMAGICAL (av))
184	for (i = 0; i <= len; ++i)	330	for (i = 0; i <= len; ++i)
185	{	331	{
186	SV **svp = av_fetch (av, i, 0);	332	SV **svp = av_fetch (av, i, 0);
187	encode_sv (enc, svp ? *svp : &PL_sv_undef);	333	encode_sv (enc, svp ? *svp : &PL_sv_undef);
188	}	334	}
		335	else
		336	for (i = 0; i <= len; ++i)
		337	{
		338	SV *sv = AvARRAY (av)[i];
		339	encode_sv (enc, sv ? sv : &PL_sv_undef);
		340	}
189		341
190	--enc->depth;	342	--enc->depth;
191	}	343	}
192		344
193	static void	345	static void
…		…
202		354
203	int pairs = hv_iterinit (hv);	355	int pairs = hv_iterinit (hv);
204	int mg = SvMAGICAL (hv);	356	int mg = SvMAGICAL (hv);
205		357
206	if (mg)	358	if (mg)
207	encode_ch (enc, 0xa0 | 31);	359	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
208	else	360	else
209	encode_uint (enc, 0xa0, pairs);	361	encode_uint (enc, MAJOR_MAP, pairs);
210		362
211	while ((he = hv_iternext (hv)))	363	while ((he = hv_iternext (hv)))
212	{	364	{
213	if (HeKLEN (he) == HEf_SVKEY)	365	if (HeKLEN (he) == HEf_SVKEY)
214	encode_sv (enc, HeSVKEY (he));	366	encode_sv (enc, HeSVKEY (he));
215	else	367	else
216	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	368	encode_strref (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));
217		369
218	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	370	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
219	}	371	}
220		372
221	if (mg)	373	if (mg)
222	encode_ch (enc, 0xe0 | 31);	374	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
223		375
224	--enc->depth;	376	--enc->depth;
225	}	377	}
226		378
227	// encode objects, arrays and special \0=false and \1=true values.	379	// encode objects, arrays and special \0=false and \1=true values.
228	static void	380	static void
229	encode_rv (enc_t *enc, SV *sv)	381	encode_rv (enc_t *enc, SV *sv)
230	{	382	{
231	svtype svt;
232
233	SvGETMAGIC (sv);	383	SvGETMAGIC (sv);
		384
234	svt = SvTYPE (sv);	385	svtype svt = SvTYPE (sv);
235		386
236	if (ecb_expect_false (SvOBJECT (sv)))	387	if (ecb_expect_false (SvOBJECT (sv)))
237	{	388	{
238	HV *stash = !CBOR_SLOW || cbor_boolean_stash	389	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
239	? cbor_boolean_stash	390	? types_boolean_stash
		391	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		392	HV *error_stash = !CBOR_SLOW || types_error_stash
		393	? types_error_stash
		394	: gv_stashpv ("Types::Serialiser::Error", 1);
		395	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		396	? cbor_tagged_stash
240	: gv_stashpv ("CBOR::XS::Boolean", 1);	397	: gv_stashpv ("CBOR::XS::Tagged" , 1);
241		398
242	if (SvSTASH (sv) == stash)	399	HV *stash = SvSTASH (sv);
243	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	400
		401	if (stash == boolean_stash)
		402	{
		403	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		404	return;
		405	}
		406	else if (stash == error_stash)
		407	{
		408	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		409	return;
		410	}
		411	else if (stash == tagged_stash)
		412	{
		413	if (svt != SVt_PVAV)
		414	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		415
		416	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
		417	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		418
		419	return;
		420	}
		421	}
		422
		423	if (ecb_expect_false (SvREFCNT (sv) > 1)
		424	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		425	{
		426	if (!enc->shareable)
		427	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		428
		429	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		430
		431	if (SvOK (*svp))
		432	{
		433	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		434	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		435	return;
		436	}
244	else	437	else
245	{	438	{
246	#if 0 //TODO	439	sv_setuv (*svp, enc->shareable_idx);
247	if (enc->cbor.flags & F_CONV_BLESSED)	440	++enc->shareable_idx;
		441	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		442	}
		443	}
		444
		445	if (ecb_expect_false (SvOBJECT (sv)))
		446	{
		447	HV *stash = SvSTASH (sv);
		448	GV *method;
		449
		450	if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
248	{	451	{
		452	dSP;
		453
		454	ENTER; SAVETMPS;
		455	PUSHMARK (SP);
249	// we re-bless the reference to get overload and other niceties right	456	// we re-bless the reference to get overload and other niceties right
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)));	457	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
258		458
259	// calling with G_SCALAR ensures that we always get a 1 return value
260	PUTBACK;	459	PUTBACK;
		460	// G_SCALAR ensures that return value is 1
261	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	461	call_sv ((SV *)GvCV (method), G_SCALAR);
262	SPAGAIN;	462	SPAGAIN;
263		463
264	// catch this surprisingly common error	464	// catch this surprisingly common error
265	if (SvROK (TOPs) && SvRV (TOPs) == sv)	465	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)));	466	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
267		467
268	sv = POPs;
269	PUTBACK;
270
271	encode_sv (enc, sv);	468	encode_sv (enc, POPs);
272		469
		470	PUTBACK;
		471
273	FREETMPS; LEAVE;	472	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	}	473	}
281	else if (enc->cbor.flags & F_ALLOW_BLESSED)	474	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
282	encode_str (enc, "null", 4, 0);	475	{
		476	dSP;
		477
		478	ENTER; SAVETMPS;
		479	SAVESTACK_POS ();
		480	PUSHMARK (SP);
		481	EXTEND (SP, 2);
		482	// we re-bless the reference to get overload and other niceties right
		483	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		484	PUSHs (sv_cbor);
		485
		486	PUTBACK;
		487	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		488	SPAGAIN;
		489
		490	// catch this surprisingly common error
		491	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		492	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		493
		494	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		495	encode_uint (enc, MAJOR_ARRAY, count + 1);
		496	encode_strref (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		497
		498	while (count)
		499	encode_sv (enc, SP[1 - count--]);
		500
		501	PUTBACK;
		502
		503	FREETMPS; LEAVE;
		504	}
283	else	505	else
284	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	506	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
285	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	507	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
286	#endif
287	}
288	}	508	}
289	else if (svt == SVt_PVHV)	509	else if (svt == SVt_PVHV)
290	encode_hv (enc, (HV *)sv);	510	encode_hv (enc, (HV *)sv);
291	else if (svt == SVt_PVAV)	511	else if (svt == SVt_PVAV)
292	encode_av (enc, (AV *)sv);	512	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	513	else
311	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	514	{
312	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	515	encode_tag (enc, CBOR_TAG_INDIRECTION);
		516	encode_sv (enc, sv);
		517	}
313	}	518	}
314		519
315	static void	520	static void
316	encode_nv (enc_t *enc, SV *sv)	521	encode_nv (enc_t *enc, SV *sv)
317	{	522	{
318	double nv = SvNVX (sv);	523	double nv = SvNVX (sv);
319		524
320	need (enc, 9);	525	need (enc, 9);
321		526
322	if (ecb_expect_false (nv == (U32)nv))	527	if (ecb_expect_false (nv == (NV)(U32)nv))
323	encode_uint (enc, 0x00, (U32)nv);	528	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
324	//TODO: maybe I32?	529	//TODO: maybe I32?
325	else if (ecb_expect_false (nv == (float)nv))	530	else if (ecb_expect_false (nv == (float)nv))
326	{	531	{
327	uint32_t fp = ecb_float_to_binary32 (nv);	532	uint32_t fp = ecb_float_to_binary32 (nv);
328		533
329	*enc->cur++ = 0xe0 | 26;	534	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
330		535
331	if (!ecb_big_endian ())	536	if (!ecb_big_endian ())
332	fp = ecb_bswap32 (fp);	537	fp = ecb_bswap32 (fp);
333		538
334	memcpy (enc->cur, &fp, 4);	539	memcpy (enc->cur, &fp, 4);
…		…
336	}	541	}
337	else	542	else
338	{	543	{
339	uint64_t fp = ecb_double_to_binary64 (nv);	544	uint64_t fp = ecb_double_to_binary64 (nv);
340		545
341	*enc->cur++ = 0xe0 | 27;	546	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
342		547
343	if (!ecb_big_endian ())	548	if (!ecb_big_endian ())
344	fp = ecb_bswap64 (fp);	549	fp = ecb_bswap64 (fp);
345		550
346	memcpy (enc->cur, &fp, 8);	551	memcpy (enc->cur, &fp, 8);
…		…
355		560
356	if (SvPOKp (sv))	561	if (SvPOKp (sv))
357	{	562	{
358	STRLEN len;	563	STRLEN len;
359	char *str = SvPV (sv, len);	564	char *str = SvPV (sv, len);
360	encode_str (enc, SvUTF8 (sv), str, len);	565	encode_strref (enc, SvUTF8 (sv), str, len);
361	}	566	}
362	else if (SvNOKp (sv))	567	else if (SvNOKp (sv))
363	encode_nv (enc, sv);	568	encode_nv (enc, sv);
364	else if (SvIOKp (sv))	569	else if (SvIOKp (sv))
365	{	570	{
366	if (SvIsUV (sv))	571	if (SvIsUV (sv))
367	encode_uint (enc, 0x00, SvUVX (sv));	572	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
368	else if (SvIVX (sv) >= 0)	573	else if (SvIVX (sv) >= 0)
369	encode_uint (enc, 0x00, SvIVX (sv));	574	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
370	else	575	else
371	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	576	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
372	}	577	}
373	else if (SvROK (sv))	578	else if (SvROK (sv))
374	encode_rv (enc, SvRV (sv));	579	encode_rv (enc, SvRV (sv));
375	else if (!SvOK (sv))	580	else if (!SvOK (sv))
376	encode_ch (enc, 0xe0 | 22);	581	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
377	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	582	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
378	encode_ch (enc, 0xe0 | 23);	583	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
379	else	584	else
380	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	585	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
381	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	586	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
382	}	587	}
383		588
384	static SV *	589	static SV *
385	encode_cbor (SV *scalar, CBOR *cbor)	590	encode_cbor (SV *scalar, CBOR *cbor)
386	{	591	{
387	enc_t enc;	592	enc_t enc = { 0 };
388		593
389	enc.cbor = *cbor;	594	enc.cbor = *cbor;
390	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	595	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
391	enc.cur = SvPVX (enc.sv);	596	enc.cur = SvPVX (enc.sv);
392	enc.end = SvEND (enc.sv);	597	enc.end = SvEND (enc.sv);
393	enc.depth = 0;
394		598
395	SvPOK_only (enc.sv);	599	SvPOK_only (enc.sv);
		600
		601	if (cbor->flags & F_PACK_STRINGS)
		602	{
		603	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		604	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		605	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		606	}
		607
396	encode_sv (&enc, scalar);	608	encode_sv (&enc, scalar);
397		609
398	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	610	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
399	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	611	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
400		612
…		…
414	U8 *end; // end of input string	626	U8 *end; // end of input string
415	const char *err; // parse error, if != 0	627	const char *err; // parse error, if != 0
416	CBOR cbor;	628	CBOR cbor;
417	U32 depth; // recursion depth	629	U32 depth; // recursion depth
418	U32 maxdepth; // recursion depth limit	630	U32 maxdepth; // recursion depth limit
		631	AV *shareable;
		632	AV *stringref;
		633	SV *decode_tagged;
419	} dec_t;	634	} dec_t;
420		635
421	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	636	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE
422		637
423	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	638	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")
…		…
426	#define DEC_DEC_DEPTH --dec->depth	641	#define DEC_DEC_DEPTH --dec->depth
427		642
428	static UV	643	static UV
429	decode_uint (dec_t *dec)	644	decode_uint (dec_t *dec)
430	{	645	{
431	switch (*dec->cur & 31)	646	U8 m = *dec->cur & MINOR_MASK;
432	{	647	++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		648
438	case 24:	649	if (ecb_expect_true (m < LENGTH_EXT1))
		650	return m;
		651	else if (ecb_expect_true (m == LENGTH_EXT1))
		652	{
439	WANT (2);	653	WANT (1);
440	dec->cur += 2;	654	dec->cur += 1;
441	return dec->cur[-1];	655	return dec->cur[-1];
442		656	}
443	case 25:	657	else if (ecb_expect_true (m == LENGTH_EXT2))
		658	{
444	WANT (3);	659	WANT (2);
445	dec->cur += 3;	660	dec->cur += 2;
446	return (((UV)dec->cur[-2]) << 8)	661	return (((UV)dec->cur[-2]) << 8)
447	| ((UV)dec->cur[-1]);	662	| ((UV)dec->cur[-1]);
448		663	}
449	case 26:	664	else if (ecb_expect_true (m == LENGTH_EXT4))
		665	{
450	WANT (5);	666	WANT (4);
451	dec->cur += 5;	667	dec->cur += 4;
452	return (((UV)dec->cur[-4]) << 24)	668	return (((UV)dec->cur[-4]) << 24)
453	| (((UV)dec->cur[-3]) << 16)	669	| (((UV)dec->cur[-3]) << 16)
454	| (((UV)dec->cur[-2]) << 8)	670	| (((UV)dec->cur[-2]) << 8)
455	| ((UV)dec->cur[-1]);	671	| ((UV)dec->cur[-1]);
456		672	}
457	case 27:	673	else if (ecb_expect_true (m == LENGTH_EXT8))
		674	{
458	WANT (9);	675	WANT (8);
459	dec->cur += 9;	676	dec->cur += 8;
		677
		678	return
		679	#if UVSIZE < 8
		680	0
		681	#else
460	return (((UV)dec->cur[-8]) << 56)	682	(((UV)dec->cur[-8]) << 56)
461	| (((UV)dec->cur[-7]) << 48)	683	| (((UV)dec->cur[-7]) << 48)
462	| (((UV)dec->cur[-6]) << 40)	684	| (((UV)dec->cur[-6]) << 40)
463	| (((UV)dec->cur[-5]) << 32)	685	| (((UV)dec->cur[-5]) << 32)
		686	#endif
464	| (((UV)dec->cur[-4]) << 24)	687	| (((UV)dec->cur[-4]) << 24)
465	| (((UV)dec->cur[-3]) << 16)	688	| (((UV)dec->cur[-3]) << 16)
466	| (((UV)dec->cur[-2]) << 8)	689	| (((UV)dec->cur[-2]) << 8)
467	| ((UV)dec->cur[-1]);	690	| ((UV)dec->cur[-1]);
468		691	}
469	default:	692	else
470	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	693	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
471	}
472		694
473	fail:	695	fail:
474	return 0;	696	return 0;
475	}	697	}
476		698
…		…
481	{	703	{
482	AV *av = newAV ();	704	AV *av = newAV ();
483		705
484	DEC_INC_DEPTH;	706	DEC_INC_DEPTH;
485		707
486	if ((*dec->cur & 31) == 31)	708	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
487	{	709	{
488	++dec->cur;	710	++dec->cur;
489		711
490	for (;;)	712	for (;;)
491	{	713	{
492	WANT (1);	714	WANT (1);
493		715
494	if (*dec->cur == (0xe0 | 31))	716	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
495	{	717	{
496	++dec->cur;	718	++dec->cur;
497	break;	719	break;
498	}	720	}
499		721
…		…
502	}	724	}
503	else	725	else
504	{	726	{
505	int i, len = decode_uint (dec);	727	int i, len = decode_uint (dec);
506		728
		729	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);	730	av_fill (av, len - 1);
508		731
509	for (i = 0; i < len; ++i)	732	for (i = 0; i < len; ++i)
510	AvARRAY (av)[i] = decode_sv (dec);	733	AvARRAY (av)[i] = decode_sv (dec);
511	}	734	}
…		…
517	SvREFCNT_dec (av);	740	SvREFCNT_dec (av);
518	DEC_DEC_DEPTH;	741	DEC_DEC_DEPTH;
519	return &PL_sv_undef;	742	return &PL_sv_undef;
520	}	743	}
521		744
		745	static void
		746	decode_he (dec_t *dec, HV *hv)
		747	{
		748	// for speed reasons, we specialcase single-string
		749	// byte or utf-8 strings as keys, but only when !stringref
		750
		751	if (ecb_expect_true (!dec->stringref))
		752	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		753	{
		754	I32 len = decode_uint (dec);
		755	char *key = (char *)dec->cur;
		756
		757	WANT (len);
		758	dec->cur += len;
		759
		760	hv_store (hv, key, len, decode_sv (dec), 0);
		761
		762	return;
		763	}
		764	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		765	{
		766	I32 len = decode_uint (dec);
		767	char *key = (char *)dec->cur;
		768
		769	WANT (len);
		770	dec->cur += len;
		771
		772	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		773	if (!is_utf8_string (key, len))
		774	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		775
		776	hv_store (hv, key, -len, decode_sv (dec), 0);
		777
		778	return;
		779	}
		780
		781	SV *k = decode_sv (dec);
		782	SV *v = decode_sv (dec);
		783
		784	hv_store_ent (hv, k, v, 0);
		785	SvREFCNT_dec (k);
		786
		787	fail:
		788	;
		789	}
		790
522	static SV *	791	static SV *
523	decode_hv (dec_t *dec)	792	decode_hv (dec_t *dec)
524	{	793	{
525	HV *hv = newHV ();	794	HV *hv = newHV ();
526		795
527	DEC_INC_DEPTH;	796	DEC_INC_DEPTH;
528		797
529	if ((*dec->cur & 31) == 31)	798	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
530	{	799	{
531	++dec->cur;	800	++dec->cur;
532		801
533	for (;;)	802	for (;;)
534	{	803	{
535	WANT (1);	804	WANT (1);
536		805
537	if (*dec->cur == (0xe0 | 31))	806	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
538	{	807	{
539	++dec->cur;	808	++dec->cur;
540	break;	809	break;
541	}	810	}
542		811
543	SV *k = decode_sv (dec);	812	decode_he (dec, hv);
544	SV *v = decode_sv (dec);
545
546	hv_store_ent (hv, k, v, 0);
547	}	813	}
548	}	814	}
549	else	815	else
550	{	816	{
551	int len = decode_uint (dec);	817	int pairs = decode_uint (dec);
552		818
553	while (len--)	819	while (pairs--)
554	{	820	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	}	821	}
561		822
562	DEC_DEC_DEPTH;	823	DEC_DEC_DEPTH;
563	return newRV_noinc ((SV *)hv);	824	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		825
720	fail:	826	fail:
721	SvREFCNT_dec (hv);	827	SvREFCNT_dec (hv);
722	DEC_DEC_DEPTH;	828	DEC_DEC_DEPTH;
723	return &PL_sv_undef;	829	return &PL_sv_undef;
724	}	830	}
725		831
726	static SV *	832	static SV *
727	decode_str (dec_t *dec, int utf8)	833	decode_str (dec_t *dec, int utf8)
728	{	834	{
729	SV *sv;	835	SV *sv = 0;
730		836
731	if ((*dec->cur & 31) == 31)	837	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
732	{	838	{
		839	// indefinite length strings
733	++dec->cur;	840	++dec->cur;
734		841
		842	U8 major = *dec->cur & MAJOR_MISC;
		843
735	sv = newSVpvn ("", 0);	844	sv = newSVpvn ("", 0);
736		845
737	// not very fast, and certainly not robust against illegal input
738	for (;;)	846	for (;;)
739	{	847	{
740	WANT (1);	848	WANT (1);
741		849
742	if (*dec->cur == (0xe0 | 31))	850	if ((*dec->cur - major) > LENGTH_EXT8)
		851	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
743	{	852	{
744	++dec->cur;	853	++dec->cur;
745	break;	854	break;
746	}	855	}
		856	else
		857	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
747		858
748	SV *sv2 = decode_sv (dec);	859	STRLEN len = decode_uint (dec);
749	sv_catsv (sv, sv2);	860
		861	WANT (len);
		862	sv_catpvn (sv, dec->cur, len);
		863	dec->cur += len;
750	}	864	}
751	}	865	}
752	else	866	else
753	{	867	{
754	STRLEN len = decode_uint (dec);	868	STRLEN len = decode_uint (dec);
755		869
756	WANT (len);	870	WANT (len);
757	sv = newSVpvn (dec->cur, len);	871	sv = newSVpvn (dec->cur, len);
758	dec->cur += len;	872	dec->cur += len;
		873
		874	if (ecb_expect_false (dec->stringref)
		875	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		876	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
759	}	877	}
760		878
761	if (utf8)	879	if (utf8)
		880	{
		881	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		882	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		883	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		884
762	SvUTF8_on (sv);	885	SvUTF8_on (sv);
		886	}
763		887
764	return sv;	888	return sv;
765		889
766	fail:	890	fail:
		891	SvREFCNT_dec (sv);
767	return &PL_sv_undef;	892	return &PL_sv_undef;
768	}	893	}
769		894
770	static SV *	895	static SV *
771	decode_tagged (dec_t *dec)	896	decode_tagged (dec_t *dec)
772	{	897	{
		898	SV *sv = 0;
773	UV tag = decode_uint (dec);	899	UV tag = decode_uint (dec);
		900
		901	WANT (1);
		902
		903	switch (tag)
		904	{
		905	case CBOR_TAG_MAGIC:
774	SV *sv = decode_sv (dec);	906	sv = decode_sv (dec);
		907	break;
775		908
776	if (tag == 55799) // 2.4.5 Self-Describe CBOR	909	case CBOR_TAG_INDIRECTION:
		910	sv = newRV_noinc (decode_sv (dec));
		911	break;
		912
		913	case CBOR_TAG_STRINGREF_NAMESPACE:
		914	{
		915	ENTER; SAVETMPS;
		916
		917	SAVESPTR (dec->stringref);
		918	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		919
		920	sv = decode_sv (dec);
		921
		922	FREETMPS; LEAVE;
		923	}
		924	break;
		925
		926	case CBOR_TAG_STRINGREF:
		927	{
		928	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		929	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		930
		931	UV idx = decode_uint (dec);
		932
		933	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		934	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		935
		936	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		937	}
		938	break;
		939
		940	case CBOR_TAG_VALUE_SHAREABLE:
		941	{
		942	if (ecb_expect_false (!dec->shareable))
		943	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		944
		945	if (dec->cbor.flags & F_ALLOW_CYCLES)
		946	{
		947	sv = newSV (0);
		948	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		949
		950	SV *osv = decode_sv (dec);
		951	sv_setsv (sv, osv);
		952	SvREFCNT_dec_NN (osv);
		953	}
		954	else
		955	{
		956	av_push (dec->shareable, &PL_sv_undef);
		957	int idx = AvFILLp (dec->shareable);
		958	sv = decode_sv (dec);
		959	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		960	}
		961	}
		962	break;
		963
		964	case CBOR_TAG_VALUE_SHAREDREF:
		965	{
		966	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		967	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		968
		969	UV idx = decode_uint (dec);
		970
		971	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		972	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		973
		974	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		975
		976	if (sv == &PL_sv_undef)
		977	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		978	}
		979	break;
		980
		981	case CBOR_TAG_PERL_OBJECT:
		982	{
		983	sv = decode_sv (dec);
		984
		985	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		986	ERR ("corrupted CBOR data (non-array perl object)");
		987
		988	AV *av = (AV *)SvRV (sv);
		989	int len = av_len (av) + 1;
		990	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		991
		992	if (!stash)
		993	ERR ("cannot decode perl-object (package does not exist)");
		994
		995	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		996
		997	if (!method)
		998	ERR ("cannot decode perl-object (package does not have a THAW method)");
		999
		1000	dSP;
		1001
		1002	ENTER; SAVETMPS;
		1003	PUSHMARK (SP);
		1004	EXTEND (SP, len + 1);
		1005	// we re-bless the reference to get overload and other niceties right
		1006	PUSHs (*av_fetch (av, 0, 1));
		1007	PUSHs (sv_cbor);
		1008
		1009	int i;
		1010
		1011	for (i = 1; i < len; ++i)
		1012	PUSHs (*av_fetch (av, i, 1));
		1013
		1014	PUTBACK;
		1015	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1016	SPAGAIN;
		1017
		1018	if (SvTRUE (ERRSV))
		1019	{
		1020	FREETMPS; LEAVE;
		1021	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1022	}
		1023
		1024	SvREFCNT_dec (sv);
		1025	sv = SvREFCNT_inc (POPs);
		1026
		1027	PUTBACK;
		1028
		1029	FREETMPS; LEAVE;
		1030	}
		1031	break;
		1032
		1033	default:
		1034	{
		1035	sv = decode_sv (dec);
		1036
		1037	dSP;
		1038	ENTER; SAVETMPS;
		1039	SAVESTACK_POS ();
		1040	PUSHMARK (SP);
		1041	EXTEND (SP, 2);
		1042	PUSHs (newSVuv (tag));
		1043	PUSHs (sv);
		1044
		1045	PUTBACK;
		1046	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1047	SPAGAIN;
		1048
		1049	if (SvTRUE (ERRSV))
		1050	{
		1051	FREETMPS; LEAVE;
		1052	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1053	}
		1054
		1055	if (count)
		1056	{
		1057	SvREFCNT_dec (sv);
		1058	sv = SvREFCNT_inc (POPs);
		1059	}
		1060	else
		1061	{
		1062	AV *av = newAV ();
		1063	av_push (av, newSVuv (tag));
		1064	av_push (av, sv);
		1065
		1066	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1067	? cbor_tagged_stash
		1068	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1069	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1070	}
		1071
		1072	PUTBACK;
		1073
		1074	FREETMPS; LEAVE;
		1075	}
		1076	break;
		1077	}
		1078
777	return sv;	1079	return sv;
778		1080
779	AV *av = newAV ();	1081	fail:
780	av_push (av, newSVuv (tag));	1082	SvREFCNT_dec (sv);
781	av_push (av, sv);	1083	return &PL_sv_undef;
782	return newRV_noinc ((SV *)av);
783	}	1084	}
784		1085
785	static SV *	1086	static SV *
786	decode_sv (dec_t *dec)	1087	decode_sv (dec_t *dec)
787	{	1088	{
788	WANT (1);	1089	WANT (1);
789		1090
790	switch (*dec->cur >> 5)	1091	switch (*dec->cur >> MAJOR_SHIFT)
791	{	1092	{
792	case 0: // unsigned int	1093	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
793	//TODO: 64 bit values on 3 2bit perls	1094	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
794	return newSVuv (decode_uint (dec));	1095	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
795	case 1: // negative int	1096	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
796	return newSViv (-1 - (IV)decode_uint (dec));	1097	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
797	case 2: // octet string	1098	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
798	return decode_str (dec, 0);	1099	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
799	case 3: // utf-8 string	1100
800	return decode_str (dec, 1);	1101	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)	1102	switch (*dec->cur++ & MINOR_MASK)
809	{	1103	{
810	case 20:	1104	case SIMPLE_FALSE:
811	#if CBOR_SLOW	1105	#if CBOR_SLOW
812	cbor_false = get_bool ("CBOR::XS::false");	1106	types_false = get_bool ("Types::Serialiser::false");
813	#endif	1107	#endif
814	return newSVsv (cbor_false);	1108	return newSVsv (types_false);
815	case 21:	1109	case SIMPLE_TRUE:
816	#if CBOR_SLOW	1110	#if CBOR_SLOW
817	cbor_true = get_bool ("CBOR::XS::true");	1111	types_true = get_bool ("Types::Serialiser::true");
818	#endif	1112	#endif
819	return newSVsv (cbor_true);	1113	return newSVsv (types_true);
820	case 22:	1114	case SIMPLE_NULL:
821	return newSVsv (&PL_sv_undef);	1115	return newSVsv (&PL_sv_undef);
		1116	case SIMPLE_UNDEF:
		1117	#if CBOR_SLOW
		1118	types_error = get_bool ("Types::Serialiser::error");
		1119	#endif
		1120	return newSVsv (types_error);
822		1121
823	case 25:	1122	case MISC_FLOAT16:
824	{	1123	{
825	WANT (2);	1124	WANT (2);
826		1125
827	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1126	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
828	dec->cur += 2;	1127	dec->cur += 2;
829		1128
830	return newSVnv (ecb_binary16_to_float (fp));	1129	return newSVnv (ecb_binary16_to_float (fp));
831	}	1130	}
832		1131
833	case 26:	1132	case MISC_FLOAT32:
834	{	1133	{
835	uint32_t fp;	1134	uint32_t fp;
836	WANT (4);	1135	WANT (4);
837	memcpy (&fp, dec->cur, 4);	1136	memcpy (&fp, dec->cur, 4);
838	dec->cur += 4;	1137	dec->cur += 4;
…		…
841	fp = ecb_bswap32 (fp);	1140	fp = ecb_bswap32 (fp);
842		1141
843	return newSVnv (ecb_binary32_to_float (fp));	1142	return newSVnv (ecb_binary32_to_float (fp));
844	}	1143	}
845		1144
846	case 27:	1145	case MISC_FLOAT64:
847	{	1146	{
848	uint64_t fp;	1147	uint64_t fp;
849	WANT (8);	1148	WANT (8);
850	memcpy (&fp, dec->cur, 8);	1149	memcpy (&fp, dec->cur, 8);
851	dec->cur += 8;	1150	dec->cur += 8;
…		…
854	fp = ecb_bswap64 (fp);	1153	fp = ecb_bswap64 (fp);
855		1154
856	return newSVnv (ecb_binary64_to_double (fp));	1155	return newSVnv (ecb_binary64_to_double (fp));
857	}	1156	}
858		1157
859	// 0..19 unassigned	1158	// 0..19 unassigned simple
860	// 24 reserved + unassigned (reserved values are not encodable)	1159	// 24 reserved + unassigned simple (reserved values are not encodable)
		1160	// 28-30 unassigned misc
		1161	// 31 break code
861	default:	1162	default:
862	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1163	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
863	}	1164	}
864		1165
865	break;	1166	break;
866	}	1167	}
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		1168
924	fail:	1169	fail:
925	return &PL_sv_undef;	1170	return &PL_sv_undef;
926	}	1171	}
927		1172
928	static SV *	1173	static SV *
929	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1174	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
930	{	1175	{
931	dec_t dec;	1176	dec_t dec = { 0 };
932	SV *sv;	1177	SV *sv;
		1178	STRLEN len;
		1179	char *data = SvPVbyte (string, len);
933		1180
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)	1181	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",	1182	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);	1183	(unsigned long)len, (unsigned long)cbor->max_size);
965	}
966
967	sv_utf8_downgrade (string, 0);
968		1184
969	dec.cbor = *cbor;	1185	dec.cbor = *cbor;
970	dec.cur = (U8 *)SvPVX (string);	1186	dec.cur = (U8 *)data;
971	dec.end = (U8 *)SvEND (string);	1187	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		1188
978	sv = decode_sv (&dec);	1189	sv = decode_sv (&dec);
979		1190
980	if (offset_return)	1191	if (offset_return)
981	*offset_return = dec.cur;	1192	*offset_return = dec.cur;
…		…
984	if (dec.cur != dec.end && !dec.err)	1195	if (dec.cur != dec.end && !dec.err)
985	dec.err = "garbage after CBOR object";	1196	dec.err = "garbage after CBOR object";
986		1197
987	if (dec.err)	1198	if (dec.err)
988	{	1199	{
		1200	if (dec.shareable)
		1201	{
		1202	// need to break cyclic links, which whould all be in shareable
		1203	int i;
		1204	SV **svp;
		1205
		1206	for (i = av_len (dec.shareable) + 1; i--; )
		1207	if ((svp = av_fetch (dec.shareable, i, 0)))
		1208	sv_setsv (*svp, &PL_sv_undef);
		1209	}
		1210
989	SvREFCNT_dec (sv);	1211	SvREFCNT_dec (sv);
990	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1212	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
991	}	1213	}
992		1214
993	sv = sv_2mortal (sv);	1215	sv = sv_2mortal (sv);
994		1216
995	return sv;	1217	return sv;
996	}	1218	}
997		1219
		1220	/////////////////////////////////////////////////////////////////////////////
		1221	// incremental parser
		1222
		1223	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1224
		1225	// returns 0 for notyet, 1 for success or error
		1226	static int
		1227	incr_parse (CBOR *self, SV *cborstr)
		1228	{
		1229	STRLEN cur;
		1230	SvPV (cborstr, cur);
		1231
		1232	while (ecb_expect_true (self->incr_need <= cur))
		1233	{
		1234	// table of integer count bytes
		1235	static I8 incr_len[MINOR_MASK + 1] = {
		1236	0, 0, 0, 0, 0, 0, 0, 0,
		1237	0, 0, 0, 0, 0, 0, 0, 0,
		1238	0, 0, 0, 0, 0, 0, 0, 0,
		1239	1, 2, 4, 8,-1,-1,-1,-2
		1240	};
		1241
		1242	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1243	U8 m = *p & MINOR_MASK;
		1244	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1245	I8 ilen = incr_len[m];
		1246
		1247	self->incr_need = self->incr_pos + 1;
		1248
		1249	if (ecb_expect_false (ilen < 0))
		1250	{
		1251	if (m != MINOR_INDEF)
		1252	return 1; // error
		1253
		1254	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1255	{
		1256	if (count >= 0)
		1257	return 1; // error
		1258
		1259	count = 1;
		1260	}
		1261	else
		1262	{
		1263	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1264	count = -1;
		1265	}
		1266	}
		1267	else
		1268	{
		1269	self->incr_need += ilen;
		1270	if (ecb_expect_false (self->incr_need > cur))
		1271	return 0;
		1272
		1273	int major = *p >> MAJOR_SHIFT;
		1274
		1275	switch (major)
		1276	{
		1277	case MAJOR_TAG >> MAJOR_SHIFT:
		1278	++count; // tags merely prefix another value
		1279	break;
		1280
		1281	case MAJOR_BYTES >> MAJOR_SHIFT:
		1282	case MAJOR_TEXT >> MAJOR_SHIFT:
		1283	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1284	case MAJOR_MAP >> MAJOR_SHIFT:
		1285	{
		1286	UV len;
		1287
		1288	if (ecb_expect_false (ilen))
		1289	{
		1290	len = 0;
		1291
		1292	do {
		1293	len = (len << 8) | *++p;
		1294	} while (--ilen);
		1295	}
		1296	else
		1297	len = m;
		1298
		1299	switch (major)
		1300	{
		1301	case MAJOR_BYTES >> MAJOR_SHIFT:
		1302	case MAJOR_TEXT >> MAJOR_SHIFT:
		1303	self->incr_need += len;
		1304	if (ecb_expect_false (self->incr_need > cur))
		1305	return 0;
		1306
		1307	break;
		1308
		1309	case MAJOR_MAP >> MAJOR_SHIFT:
		1310	len <<= 1;
		1311	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1312	if (len)
		1313	{
		1314	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1315	count = len + 1;
		1316	}
		1317	break;
		1318	}
		1319	}
		1320	}
		1321	}
		1322
		1323	self->incr_pos = self->incr_need;
		1324
		1325	if (count > 0)
		1326	{
		1327	while (!--count)
		1328	{
		1329	if (!AvFILLp (self->incr_count))
		1330	return 1; // done
		1331
		1332	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1333	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1334	}
		1335
		1336	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1337	}
		1338	}
		1339
		1340	return 0;
		1341	}
		1342
		1343
998	/////////////////////////////////////////////////////////////////////////////	1344	/////////////////////////////////////////////////////////////////////////////
999	// XS interface functions	1345	// XS interface functions
1000		1346
1001	MODULE = CBOR::XS PACKAGE = CBOR::XS	1347	MODULE = CBOR::XS PACKAGE = CBOR::XS
1002		1348
1003	BOOT:	1349	BOOT:
1004	{	1350	{
1005	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1351	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1006	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1352	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1007		1353
1008	cbor_true = get_bool ("CBOR::XS::true");	1354	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1009	cbor_false = get_bool ("CBOR::XS::false");	1355	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1356
		1357	types_true = get_bool ("Types::Serialiser::true" );
		1358	types_false = get_bool ("Types::Serialiser::false");
		1359	types_error = get_bool ("Types::Serialiser::error");
		1360
		1361	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1362
		1363	sv_cbor = newSVpv ("CBOR", 0);
		1364	SvREADONLY_on (sv_cbor);
1010	}	1365	}
1011		1366
1012	PROTOTYPES: DISABLE	1367	PROTOTYPES: DISABLE
1013		1368
1014	void CLONE (...)	1369	void CLONE (...)
1015	CODE:	1370	CODE:
1016	cbor_stash = 0;	1371	cbor_stash = 0;
		1372	cbor_tagged_stash = 0;
		1373	types_error_stash = 0;
1017	cbor_boolean_stash = 0;	1374	types_boolean_stash = 0;
1018		1375
1019	void new (char *klass)	1376	void new (char *klass)
1020	PPCODE:	1377	PPCODE:
1021	{	1378	{
1022	SV *pv = NEWSV (0, sizeof (CBOR));	1379	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1030		1387
1031	void shrink (CBOR *self, int enable = 1)	1388	void shrink (CBOR *self, int enable = 1)
1032	ALIAS:	1389	ALIAS:
1033	shrink = F_SHRINK	1390	shrink = F_SHRINK
1034	allow_unknown = F_ALLOW_UNKNOWN	1391	allow_unknown = F_ALLOW_UNKNOWN
		1392	allow_sharing = F_ALLOW_SHARING
		1393	allow_cycles = F_ALLOW_CYCLES
		1394	pack_strings = F_PACK_STRINGS
		1395	validate_utf8 = F_VALIDATE_UTF8
1035	PPCODE:	1396	PPCODE:
1036	{	1397	{
1037	if (enable)	1398	if (enable)
1038	self->flags |= ix;	1399	self->flags |= ix;
1039	else	1400	else
…		…
1044		1405
1045	void get_shrink (CBOR *self)	1406	void get_shrink (CBOR *self)
1046	ALIAS:	1407	ALIAS:
1047	get_shrink = F_SHRINK	1408	get_shrink = F_SHRINK
1048	get_allow_unknown = F_ALLOW_UNKNOWN	1409	get_allow_unknown = F_ALLOW_UNKNOWN
		1410	get_allow_sharing = F_ALLOW_SHARING
		1411	get_allow_cycles = F_ALLOW_CYCLES
		1412	get_pack_strings = F_PACK_STRINGS
		1413	get_validate_utf8 = F_VALIDATE_UTF8
1049	PPCODE:	1414	PPCODE:
1050	XPUSHs (boolSV (self->flags & ix));	1415	XPUSHs (boolSV (self->flags & ix));
1051		1416
1052	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1417	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1053	PPCODE:	1418	PPCODE:
…		…
1069	CODE:	1434	CODE:
1070	RETVAL = self->max_size;	1435	RETVAL = self->max_size;
1071	OUTPUT:	1436	OUTPUT:
1072	RETVAL	1437	RETVAL
1073		1438
1074	#if 0 //TODO	1439	void filter (CBOR *self, SV *filter = 0)
1075
1076	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1077	PPCODE:	1440	PPCODE:
1078	{
1079	SvREFCNT_dec (self->cb_object);	1441	SvREFCNT_dec (self->filter);
1080	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1442	self->filter = filter ? newSVsv (filter) : filter;
1081
1082	XPUSHs (ST (0));	1443	XPUSHs (ST (0));
1083	}
1084		1444
1085	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1445	SV *get_filter (CBOR *self)
1086	PPCODE:	1446	CODE:
1087	{	1447	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1088	if (!self->cb_sk_object)	1448	OUTPUT:
1089	self->cb_sk_object = newHV ();	1449	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		1450
1109	void encode (CBOR *self, SV *scalar)	1451	void encode (CBOR *self, SV *scalar)
1110	PPCODE:	1452	PPCODE:
1111	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1453	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1112	XPUSHs (scalar);	1454	XPUSHs (scalar);
…		…
1125	EXTEND (SP, 2);	1467	EXTEND (SP, 2);
1126	PUSHs (sv);	1468	PUSHs (sv);
1127	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1469	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1128	}	1470	}
1129		1471
		1472	void incr_parse (CBOR *self, SV *cborstr)
		1473	ALIAS:
		1474	incr_parse_multiple = 1
		1475	PPCODE:
		1476	{
		1477	if (SvUTF8 (cborstr))
		1478	sv_utf8_downgrade (cborstr, 0);
		1479
		1480	if (!self->incr_count)
		1481	{
		1482	self->incr_count = newAV ();
		1483	self->incr_pos = 0;
		1484	self->incr_need = 1;
		1485
		1486	av_push (self->incr_count, newSViv (1));
		1487	}
		1488
		1489	do
		1490	{
		1491	if (!incr_parse (self, cborstr))
		1492	{
		1493	if (self->incr_need > self->max_size && self->max_size)
		1494	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1495	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1496
		1497	break;
		1498	}
		1499
		1500	SV *sv;
		1501	char *offset;
		1502
		1503	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1504	XPUSHs (sv);
		1505
		1506	sv_chop (cborstr, offset);
		1507
		1508	av_clear (self->incr_count);
		1509	av_push (self->incr_count, newSViv (1));
		1510
		1511	self->incr_pos = 0;
		1512	self->incr_need = self->incr_pos + 1;
		1513	}
		1514	while (ix);
		1515	}
		1516
		1517	void incr_reset (CBOR *self)
		1518	CODE:
		1519	{
		1520	SvREFCNT_dec (self->incr_count);
		1521	self->incr_count = 0;
		1522	}
		1523
1130	void DESTROY (CBOR *self)	1524	void DESTROY (CBOR *self)
1131	CODE:	1525	PPCODE:
1132	SvREFCNT_dec (self->cb_sk_object);	1526	cbor_free (self);
1133	SvREFCNT_dec (self->cb_object);
1134		1527
1135	PROTOTYPES: ENABLE	1528	PROTOTYPES: ENABLE
1136		1529
1137	void encode_cbor (SV *scalar)	1530	void encode_cbor (SV *scalar)
		1531	ALIAS:
		1532	encode_cbor = 0
		1533	encode_cbor_sharing = F_ALLOW_SHARING
1138	PPCODE:	1534	PPCODE:
1139	{	1535	{
1140	CBOR cbor;	1536	CBOR cbor;
1141	cbor_init (&cbor);	1537	cbor_init (&cbor);
		1538	cbor.flags |= ix;
1142	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1539	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1143	XPUSHs (scalar);	1540	XPUSHs (scalar);
1144	}	1541	}
1145		1542
1146	void decode_cbor (SV *cborstr)	1543	void decode_cbor (SV *cborstr)

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