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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 1.60 by root, Sat Nov 26 00:47:02 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_FORBID_OBJECTS 0x00000010UL
		105	#define F_PACK_STRINGS 0x00000020UL
		106	#define F_TEXT_KEYS 0x00000040UL
		107	#define F_TEXT_STRINGS 0x00000080UL
		108	#define F_VALIDATE_UTF8 0x00000100UL
16		109
17	#define INIT_SIZE 32 // initial scalar size to be allocated	110	#define INIT_SIZE 32 // initial scalar size to be allocated
18		111
19	#define SB do {	112	#define SB do {
20	#define SE } while (0)	113	#define SE } while (0)
…		…
31	#else	124	#else
32	# define CBOR_SLOW 0	125	# define CBOR_SLOW 0
33	# define CBOR_STASH cbor_stash	126	# define CBOR_STASH cbor_stash
34	#endif	127	#endif
35		128
36	static HV *cbor_stash, *cbor_boolean_stash; // CBOR::XS::	129	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
37	static SV *cbor_true, *cbor_false;	130	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
38		131
39	typedef struct {	132	typedef struct {
40	U32 flags;	133	U32 flags;
41	U32 max_depth;	134	U32 max_depth;
42	STRLEN max_size;	135	STRLEN max_size;
		136	SV *filter;
43		137
44	SV *cb_object;	138	// for the incremental parser
45	HV *cb_sk_object;	139	STRLEN incr_pos; // the current offset into the text
		140	STRLEN incr_need; // minimum bytes needed to decode
		141	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
46	} CBOR;	142	} CBOR;
47		143
48	ecb_inline void	144	ecb_inline void
49	cbor_init (CBOR *cbor)	145	cbor_init (CBOR *cbor)
50	{	146	{
51	Zero (cbor, 1, CBOR);	147	Zero (cbor, 1, CBOR);
52	cbor->max_depth = 512;	148	cbor->max_depth = 512;
		149	}
		150
		151	ecb_inline void
		152	cbor_free (CBOR *cbor)
		153	{
		154	SvREFCNT_dec (cbor->filter);
		155	SvREFCNT_dec (cbor->incr_count);
53	}	156	}
54		157
55	/////////////////////////////////////////////////////////////////////////////	158	/////////////////////////////////////////////////////////////////////////////
56	// utility functions	159	// utility functions
57		160
…		…
79	SvPV_renew (sv, SvCUR (sv) + 1);	182	SvPV_renew (sv, SvCUR (sv) + 1);
80	#endif	183	#endif
81	}	184	}
82	}	185	}
83		186
84	/////////////////////////////////////////////////////////////////////////////	187	// minimum length of a string to be registered for stringref
85	// fp hell	188	ecb_inline int
86		189	minimum_string_length (UV idx)
87	//TODO	190	{
		191	return idx > 23
		192	? idx > 0xffU
		193	? idx > 0xffffU
		194	? idx > 0xffffffffU
		195	? 11
		196	: 7
		197	: 5
		198	: 4
		199	: 3;
		200	}
88		201
89	/////////////////////////////////////////////////////////////////////////////	202	/////////////////////////////////////////////////////////////////////////////
90	// encoder	203	// encoder
91		204
92	// structure used for encoding CBOR	205	// structure used for encoding CBOR
…		…
95	char *cur; // SvPVX (sv) + current output position	208	char *cur; // SvPVX (sv) + current output position
96	char *end; // SvEND (sv)	209	char *end; // SvEND (sv)
97	SV *sv; // result scalar	210	SV *sv; // result scalar
98	CBOR cbor;	211	CBOR cbor;
99	U32 depth; // recursion level	212	U32 depth; // recursion level
		213	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		214	UV stringref_idx;
		215	HV *shareable; // ptr => index, or 0
		216	UV shareable_idx;
100	} enc_t;	217	} enc_t;
101		218
102	ecb_inline void	219	ecb_inline void
103	need (enc_t *enc, STRLEN len)	220	need (enc_t *enc, STRLEN len)
104	{	221	{
…		…
121	static void	238	static void
122	encode_uint (enc_t *enc, int major, UV len)	239	encode_uint (enc_t *enc, int major, UV len)
123	{	240	{
124	need (enc, 9);	241	need (enc, 9);
125		242
126	if (len < 24)	243	if (ecb_expect_true (len < LENGTH_EXT1))
127	*enc->cur++ = major | len;	244	*enc->cur++ = major | len;
128	else if (len <= 0xff)	245	else if (ecb_expect_true (len <= 0xffU))
129	{	246	{
130	*enc->cur++ = major | 24;	247	*enc->cur++ = major | LENGTH_EXT1;
131	*enc->cur++ = len;	248	*enc->cur++ = len;
132	}	249	}
133	else if (len <= 0xffff)	250	else if (len <= 0xffffU)
134	{	251	{
135	*enc->cur++ = major | 25;	252	*enc->cur++ = major | LENGTH_EXT2;
136	*enc->cur++ = len >> 8;	253	*enc->cur++ = len >> 8;
137	*enc->cur++ = len;	254	*enc->cur++ = len;
138	}	255	}
139	else if (len <= 0xffffffff)	256	else if (len <= 0xffffffffU)
140	{	257	{
141	*enc->cur++ = major | 26;	258	*enc->cur++ = major | LENGTH_EXT4;
142	*enc->cur++ = len >> 24;	259	*enc->cur++ = len >> 24;
143	*enc->cur++ = len >> 16;	260	*enc->cur++ = len >> 16;
144	*enc->cur++ = len >> 8;	261	*enc->cur++ = len >> 8;
145	*enc->cur++ = len;	262	*enc->cur++ = len;
146	}	263	}
147	else	264	else
148	{	265	{
149	*enc->cur++ = major | 27;	266	*enc->cur++ = major | LENGTH_EXT8;
150	*enc->cur++ = len >> 56;	267	*enc->cur++ = len >> 56;
151	*enc->cur++ = len >> 48;	268	*enc->cur++ = len >> 48;
152	*enc->cur++ = len >> 40;	269	*enc->cur++ = len >> 40;
153	*enc->cur++ = len >> 32;	270	*enc->cur++ = len >> 32;
154	*enc->cur++ = len >> 24;	271	*enc->cur++ = len >> 24;
…		…
156	*enc->cur++ = len >> 8;	273	*enc->cur++ = len >> 8;
157	*enc->cur++ = len;	274	*enc->cur++ = len;
158	}	275	}
159	}	276	}
160		277
161	static void	278	ecb_inline void
		279	encode_tag (enc_t *enc, UV tag)
		280	{
		281	encode_uint (enc, MAJOR_TAG, tag);
		282	}
		283
		284	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		285	ecb_noinline static void
162	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	286	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
163	{	287	{
164	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	288	STRLEN ulen = len;
		289	U8 *p, *pend = (U8 *)str + len;
		290
		291	for (p = (U8 *)str; p < pend; ++p)
		292	ulen += *p >> 7; // count set high bits
		293
		294	encode_uint (enc, MAJOR_TEXT, ulen);
		295
		296	need (enc, ulen);
		297	for (p = (U8 *)str; p < pend; ++p)
		298	if (*p < 0x80)
		299	*enc->cur++ = *p;
		300	else
		301	{
		302	*enc->cur++ = 0xc0 + (*p >> 6);
		303	*enc->cur++ = 0x80 + (*p & 63);
		304	}
		305	}
		306
		307	ecb_inline void
		308	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		309	{
		310	if (ecb_expect_false (upgrade_utf8))
		311	if (!utf8)
		312	{
		313	encode_str_utf8 (enc, utf8, str, len);
		314	return;
		315	}
		316
		317	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
165	need (enc, len);	318	need (enc, len);
166	memcpy (enc->cur, str, len);	319	memcpy (enc->cur, str, len);
167	enc->cur += len;	320	enc->cur += len;
168	}	321	}
169		322
		323	ecb_inline void
		324	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		325	{
		326	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		327	{
		328	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		329
		330	if (SvOK (*svp))
		331	{
		332	// already registered, use stringref
		333	encode_tag (enc, CBOR_TAG_STRINGREF);
		334	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		335	return;
		336	}
		337	else if (len >= minimum_string_length (enc->stringref_idx))
		338	{
		339	// register only
		340	sv_setuv (*svp, enc->stringref_idx);
		341	++enc->stringref_idx;
		342	}
		343	}
		344
		345	encode_str (enc, upgrade_utf8, utf8, str, len);
		346	}
		347
170	static void encode_sv (enc_t *enc, SV *sv);	348	static void encode_sv (enc_t *enc, SV *sv);
171		349
172	static void	350	static void
173	encode_av (enc_t *enc, AV *av)	351	encode_av (enc_t *enc, AV *av)
174	{	352	{
…		…
177	if (enc->depth >= enc->cbor.max_depth)	355	if (enc->depth >= enc->cbor.max_depth)
178	croak (ERR_NESTING_EXCEEDED);	356	croak (ERR_NESTING_EXCEEDED);
179		357
180	++enc->depth;	358	++enc->depth;
181		359
182	encode_uint (enc, 0x80, len + 1);	360	encode_uint (enc, MAJOR_ARRAY, len + 1);
183		361
		362	if (SvMAGICAL (av))
184	for (i = 0; i <= len; ++i)	363	for (i = 0; i <= len; ++i)
185	{	364	{
186	SV **svp = av_fetch (av, i, 0);	365	SV **svp = av_fetch (av, i, 0);
187	encode_sv (enc, svp ? *svp : &PL_sv_undef);	366	encode_sv (enc, svp ? *svp : &PL_sv_undef);
188	}	367	}
		368	else
		369	for (i = 0; i <= len; ++i)
		370	{
		371	SV *sv = AvARRAY (av)[i];
		372	encode_sv (enc, sv ? sv : &PL_sv_undef);
		373	}
189		374
190	--enc->depth;	375	--enc->depth;
191	}	376	}
192		377
193	static void	378	static void
…		…
202		387
203	int pairs = hv_iterinit (hv);	388	int pairs = hv_iterinit (hv);
204	int mg = SvMAGICAL (hv);	389	int mg = SvMAGICAL (hv);
205		390
206	if (mg)	391	if (mg)
207	encode_ch (enc, 0xa0 | 31);	392	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
208	else	393	else
209	encode_uint (enc, 0xa0, pairs);	394	encode_uint (enc, MAJOR_MAP, pairs);
210		395
211	while ((he = hv_iternext (hv)))	396	while ((he = hv_iternext (hv)))
212	{	397	{
213	if (HeKLEN (he) == HEf_SVKEY)	398	if (HeKLEN (he) == HEf_SVKEY)
214	encode_sv (enc, HeSVKEY (he));	399	encode_sv (enc, HeSVKEY (he));
215	else	400	else
216	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	401	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
217		402
218	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	403	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
219	}	404	}
220		405
221	if (mg)	406	if (mg)
222	encode_ch (enc, 0xe0 | 31);	407	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
223		408
224	--enc->depth;	409	--enc->depth;
225	}	410	}
226		411
227	// encode objects, arrays and special \0=false and \1=true values.	412	// encode objects, arrays and special \0=false and \1=true values.
228	static void	413	static void
229	encode_rv (enc_t *enc, SV *sv)	414	encode_rv (enc_t *enc, SV *sv)
230	{	415	{
231	svtype svt;
232
233	SvGETMAGIC (sv);	416	SvGETMAGIC (sv);
		417
234	svt = SvTYPE (sv);	418	svtype svt = SvTYPE (sv);
235		419
236	if (ecb_expect_false (SvOBJECT (sv)))	420	if (ecb_expect_false (SvOBJECT (sv)))
237	{	421	{
238	HV *stash = !CBOR_SLOW || cbor_boolean_stash	422	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
239	? cbor_boolean_stash	423	? types_boolean_stash
		424	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		425	HV *error_stash = !CBOR_SLOW || types_error_stash
		426	? types_error_stash
		427	: gv_stashpv ("Types::Serialiser::Error", 1);
		428	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		429	? cbor_tagged_stash
240	: gv_stashpv ("CBOR::XS::Boolean", 1);	430	: gv_stashpv ("CBOR::XS::Tagged" , 1);
241		431
242	if (SvSTASH (sv) == stash)	432	HV *stash = SvSTASH (sv);
243	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	433
		434	if (stash == boolean_stash)
		435	{
		436	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		437	return;
		438	}
		439	else if (stash == error_stash)
		440	{
		441	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		442	return;
		443	}
		444	else if (stash == tagged_stash)
		445	{
		446	if (svt != SVt_PVAV)
		447	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		448
		449	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
		450	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		451
		452	return;
		453	}
		454	}
		455
		456	if (ecb_expect_false (SvREFCNT (sv) > 1)
		457	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		458	{
		459	if (!enc->shareable)
		460	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		461
		462	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		463
		464	if (SvOK (*svp))
		465	{
		466	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		467	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		468	return;
		469	}
244	else	470	else
245	{	471	{
246	#if 0 //TODO	472	sv_setuv (*svp, enc->shareable_idx);
247	if (enc->cbor.flags & F_CONV_BLESSED)	473	++enc->shareable_idx;
		474	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		475	}
		476	}
		477
		478	if (ecb_expect_false (SvOBJECT (sv)))
		479	{
		480	HV *stash = SvSTASH (sv);
		481	GV *method;
		482
		483	if (enc->cbor.flags & F_FORBID_OBJECTS)
		484	croak ("encountered object '%s', but forbid_objects is enabled",
		485	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		486	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
248	{	487	{
		488	dSP;
		489
		490	ENTER; SAVETMPS;
		491	PUSHMARK (SP);
249	// we re-bless the reference to get overload and other niceties right	492	// 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)));	493	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
258		494
259	// calling with G_SCALAR ensures that we always get a 1 return value
260	PUTBACK;	495	PUTBACK;
		496	// G_SCALAR ensures that return value is 1
261	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	497	call_sv ((SV *)GvCV (method), G_SCALAR);
262	SPAGAIN;	498	SPAGAIN;
263		499
264	// catch this surprisingly common error	500	// catch this surprisingly common error
265	if (SvROK (TOPs) && SvRV (TOPs) == sv)	501	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)));	502	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
267		503
268	sv = POPs;
269	PUTBACK;
270
271	encode_sv (enc, sv);	504	encode_sv (enc, POPs);
272		505
		506	PUTBACK;
		507
273	FREETMPS; LEAVE;	508	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	}	509	}
281	else if (enc->cbor.flags & F_ALLOW_BLESSED)	510	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
282	encode_str (enc, "null", 4, 0);	511	{
		512	dSP;
		513
		514	ENTER; SAVETMPS;
		515	SAVESTACK_POS ();
		516	PUSHMARK (SP);
		517	EXTEND (SP, 2);
		518	// we re-bless the reference to get overload and other niceties right
		519	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		520	PUSHs (sv_cbor);
		521
		522	PUTBACK;
		523	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		524	SPAGAIN;
		525
		526	// catch this surprisingly common error
		527	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		528	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		529
		530	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		531	encode_uint (enc, MAJOR_ARRAY, count + 1);
		532	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		533
		534	while (count)
		535	encode_sv (enc, SP[1 - count--]);
		536
		537	PUTBACK;
		538
		539	FREETMPS; LEAVE;
		540	}
283	else	541	else
284	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	542	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
285	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	543	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
286	#endif
287	}
288	}	544	}
289	else if (svt == SVt_PVHV)	545	else if (svt == SVt_PVHV)
290	encode_hv (enc, (HV *)sv);	546	encode_hv (enc, (HV *)sv);
291	else if (svt == SVt_PVAV)	547	else if (svt == SVt_PVAV)
292	encode_av (enc, (AV *)sv);	548	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	549	else
311	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	550	{
312	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	551	encode_tag (enc, CBOR_TAG_INDIRECTION);
		552	encode_sv (enc, sv);
		553	}
313	}	554	}
314		555
315	static void	556	static void
316	encode_nv (enc_t *enc, SV *sv)	557	encode_nv (enc_t *enc, SV *sv)
317	{	558	{
318	double nv = SvNVX (sv);	559	double nv = SvNVX (sv);
319		560
320	need (enc, 9);	561	need (enc, 9);
321		562
322	if (ecb_expect_false (nv == (U32)nv))	563	if (ecb_expect_false (nv == (NV)(U32)nv))
323	encode_uint (enc, 0x00, (U32)nv);	564	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
324	//TODO: maybe I32?	565	//TODO: maybe I32?
325	else if (ecb_expect_false (nv == (float)nv))	566	else if (ecb_expect_false (nv == (float)nv))
326	{	567	{
327	uint32_t fp = ecb_float_to_binary32 (nv);	568	uint32_t fp = ecb_float_to_binary32 (nv);
328		569
329	*enc->cur++ = 0xe0 | 26;	570	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
330		571
331	if (!ecb_big_endian ())	572	if (!ecb_big_endian ())
332	fp = ecb_bswap32 (fp);	573	fp = ecb_bswap32 (fp);
333		574
334	memcpy (enc->cur, &fp, 4);	575	memcpy (enc->cur, &fp, 4);
…		…
336	}	577	}
337	else	578	else
338	{	579	{
339	uint64_t fp = ecb_double_to_binary64 (nv);	580	uint64_t fp = ecb_double_to_binary64 (nv);
340		581
341	*enc->cur++ = 0xe0 | 27;	582	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
342		583
343	if (!ecb_big_endian ())	584	if (!ecb_big_endian ())
344	fp = ecb_bswap64 (fp);	585	fp = ecb_bswap64 (fp);
345		586
346	memcpy (enc->cur, &fp, 8);	587	memcpy (enc->cur, &fp, 8);
…		…
355		596
356	if (SvPOKp (sv))	597	if (SvPOKp (sv))
357	{	598	{
358	STRLEN len;	599	STRLEN len;
359	char *str = SvPV (sv, len);	600	char *str = SvPV (sv, len);
360	encode_str (enc, SvUTF8 (sv), str, len);	601	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
361	}	602	}
362	else if (SvNOKp (sv))	603	else if (SvNOKp (sv))
363	encode_nv (enc, sv);	604	encode_nv (enc, sv);
364	else if (SvIOKp (sv))	605	else if (SvIOKp (sv))
365	{	606	{
366	if (SvIsUV (sv))	607	if (SvIsUV (sv))
367	encode_uint (enc, 0x00, SvUVX (sv));	608	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
368	else if (SvIVX (sv) >= 0)	609	else if (SvIVX (sv) >= 0)
369	encode_uint (enc, 0x00, SvIVX (sv));	610	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
370	else	611	else
371	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	612	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
372	}	613	}
373	else if (SvROK (sv))	614	else if (SvROK (sv))
374	encode_rv (enc, SvRV (sv));	615	encode_rv (enc, SvRV (sv));
375	else if (!SvOK (sv))	616	else if (!SvOK (sv))
376	encode_ch (enc, 0xe0 | 22);	617	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
377	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	618	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
378	encode_ch (enc, 0xe0 | 23);	619	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
379	else	620	else
380	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	621	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
381	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	622	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
382	}	623	}
383		624
384	static SV *	625	static SV *
385	encode_cbor (SV *scalar, CBOR *cbor)	626	encode_cbor (SV *scalar, CBOR *cbor)
386	{	627	{
387	enc_t enc;	628	enc_t enc = { 0 };
388		629
389	enc.cbor = *cbor;	630	enc.cbor = *cbor;
390	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	631	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
391	enc.cur = SvPVX (enc.sv);	632	enc.cur = SvPVX (enc.sv);
392	enc.end = SvEND (enc.sv);	633	enc.end = SvEND (enc.sv);
393	enc.depth = 0;
394		634
395	SvPOK_only (enc.sv);	635	SvPOK_only (enc.sv);
		636
		637	if (cbor->flags & F_PACK_STRINGS)
		638	{
		639	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		640	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		641	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		642	}
		643
396	encode_sv (&enc, scalar);	644	encode_sv (&enc, scalar);
397		645
398	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	646	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
399	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	647	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
400		648
…		…
414	U8 *end; // end of input string	662	U8 *end; // end of input string
415	const char *err; // parse error, if != 0	663	const char *err; // parse error, if != 0
416	CBOR cbor;	664	CBOR cbor;
417	U32 depth; // recursion depth	665	U32 depth; // recursion depth
418	U32 maxdepth; // recursion depth limit	666	U32 maxdepth; // recursion depth limit
		667	AV *shareable;
		668	AV *stringref;
		669	SV *decode_tagged;
		670	SV *err_sv; // optional sv for error, needs to be freed
419	} dec_t;	671	} dec_t;
420		672
421	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	673	// set dec->err to ERRSV
		674	ecb_cold static void
		675	err_errsv (dec_t *dec)
		676	{
		677	if (!dec->err)
		678	{
		679	dec->err_sv = newSVsv (ERRSV);
422		680
423	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	681	// chop off the trailing \n
		682	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		683	*SvEND (dec->err_sv) = 0;
424		684
		685	dec->err = SvPVutf8_nolen (dec->err_sv);
		686	}
		687	}
		688
		689	// the following functions are used to reduce code size and help the compiler to optimise
		690	ecb_cold static void
		691	err_set (dec_t *dec, const char *reason)
		692	{
		693	if (!dec->err)
		694	dec->err = reason;
		695	}
		696
		697	ecb_cold static void
		698	err_unexpected_end (dec_t *dec)
		699	{
		700	err_set (dec, "unexpected end of CBOR data");
		701	}
		702
		703	ecb_cold static void
		704	err_nesting_exceeded (dec_t *dec)
		705	{
		706	err_set (dec, ERR_NESTING_EXCEEDED);
		707	}
		708
		709	#define ERR_DO(do) SB do; goto fail; SE
		710	#define ERR(reason) ERR_DO (err_set (dec, reason))
		711	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		712
		713	#define WANT(len) if (ecb_expect_false ((UV)(dec->end - dec->cur) < (UV)len)) ERR_DO (err_unexpected_end (dec))
		714
425	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	715	#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED)
426	#define DEC_DEC_DEPTH --dec->depth	716	#define DEC_DEC_DEPTH --dec->depth
427		717
428	static UV	718	static UV
429	decode_uint (dec_t *dec)	719	decode_uint (dec_t *dec)
430	{	720	{
431	switch (*dec->cur & 31)	721	U8 m = *dec->cur & MINOR_MASK;
432	{	722	++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		723
438	case 24:	724	if (ecb_expect_true (m < LENGTH_EXT1))
		725	return m;
		726	else if (ecb_expect_true (m == LENGTH_EXT1))
		727	{
439	WANT (2);	728	WANT (1);
440	dec->cur += 2;	729	dec->cur += 1;
441	return dec->cur[-1];	730	return dec->cur[-1];
442		731	}
443	case 25:	732	else if (ecb_expect_true (m == LENGTH_EXT2))
		733	{
444	WANT (3);	734	WANT (2);
445	dec->cur += 3;	735	dec->cur += 2;
446	return (((UV)dec->cur[-2]) << 8)	736	return (((UV)dec->cur[-2]) << 8)
447	| ((UV)dec->cur[-1]);	737	| ((UV)dec->cur[-1]);
448		738	}
449	case 26:	739	else if (ecb_expect_true (m == LENGTH_EXT4))
		740	{
450	WANT (5);	741	WANT (4);
451	dec->cur += 5;	742	dec->cur += 4;
452	return (((UV)dec->cur[-4]) << 24)	743	return (((UV)dec->cur[-4]) << 24)
453	| (((UV)dec->cur[-3]) << 16)	744	| (((UV)dec->cur[-3]) << 16)
454	| (((UV)dec->cur[-2]) << 8)	745	| (((UV)dec->cur[-2]) << 8)
455	| ((UV)dec->cur[-1]);	746	| ((UV)dec->cur[-1]);
456		747	}
457	case 27:	748	else if (ecb_expect_true (m == LENGTH_EXT8))
		749	{
458	WANT (9);	750	WANT (8);
459	dec->cur += 9;	751	dec->cur += 8;
		752
		753	return
		754	#if UVSIZE < 8
		755	0
		756	#else
460	return (((UV)dec->cur[-8]) << 56)	757	(((UV)dec->cur[-8]) << 56)
461	| (((UV)dec->cur[-7]) << 48)	758	| (((UV)dec->cur[-7]) << 48)
462	| (((UV)dec->cur[-6]) << 40)	759	| (((UV)dec->cur[-6]) << 40)
463	| (((UV)dec->cur[-5]) << 32)	760	| (((UV)dec->cur[-5]) << 32)
		761	#endif
464	| (((UV)dec->cur[-4]) << 24)	762	| (((UV)dec->cur[-4]) << 24)
465	| (((UV)dec->cur[-3]) << 16)	763	| (((UV)dec->cur[-3]) << 16)
466	| (((UV)dec->cur[-2]) << 8)	764	| (((UV)dec->cur[-2]) << 8)
467	| ((UV)dec->cur[-1]);	765	| ((UV)dec->cur[-1]);
468		766	}
469	default:	767	else
470	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	768	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
471	}
472		769
473	fail:	770	fail:
474	return 0;	771	return 0;
475	}	772	}
476		773
…		…
481	{	778	{
482	AV *av = newAV ();	779	AV *av = newAV ();
483		780
484	DEC_INC_DEPTH;	781	DEC_INC_DEPTH;
485		782
486	if ((*dec->cur & 31) == 31)	783	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
487	{	784	{
488	++dec->cur;	785	++dec->cur;
489		786
490	for (;;)	787	for (;;)
491	{	788	{
492	WANT (1);	789	WANT (1);
493		790
494	if (*dec->cur == (0xe0 | 31))	791	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
495	{	792	{
496	++dec->cur;	793	++dec->cur;
497	break;	794	break;
498	}	795	}
499		796
500	av_push (av, decode_sv (dec));	797	av_push (av, decode_sv (dec));
501	}	798	}
502	}	799	}
503	else	800	else
504	{	801	{
505	int i, len = decode_uint (dec);	802	UV i, len = decode_uint (dec);
506		803
		804	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);	805	av_fill (av, len - 1);
508		806
509	for (i = 0; i < len; ++i)	807	for (i = 0; i < len; ++i)
510	AvARRAY (av)[i] = decode_sv (dec);	808	AvARRAY (av)[i] = decode_sv (dec);
511	}	809	}
…		…
517	SvREFCNT_dec (av);	815	SvREFCNT_dec (av);
518	DEC_DEC_DEPTH;	816	DEC_DEC_DEPTH;
519	return &PL_sv_undef;	817	return &PL_sv_undef;
520	}	818	}
521		819
		820	static void
		821	decode_he (dec_t *dec, HV *hv)
		822	{
		823	// for speed reasons, we specialcase single-string
		824	// byte or utf-8 strings as keys, but only when !stringref
		825
		826	if (ecb_expect_true (!dec->stringref))
		827	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		828	{
		829	STRLEN len = decode_uint (dec);
		830	char *key = (char *)dec->cur;
		831
		832	WANT (len);
		833	dec->cur += len;
		834
		835	hv_store (hv, key, len, decode_sv (dec), 0);
		836
		837	return;
		838	}
		839	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		840	{
		841	STRLEN len = decode_uint (dec);
		842	char *key = (char *)dec->cur;
		843
		844	WANT (len);
		845	dec->cur += len;
		846
		847	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		848	if (!is_utf8_string (key, len))
		849	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		850
		851	hv_store (hv, key, -len, decode_sv (dec), 0);
		852
		853	return;
		854	}
		855
		856	SV *k = decode_sv (dec);
		857	SV *v = decode_sv (dec);
		858
		859	// we leak memory if uncaught exceptions are thrown by random magical
		860	// methods, and this is hopefully the only place where it can happen,
		861	// so if there is a chance of an exception, take the very slow path.
		862	// since catching exceptions is "undocumented/internal/forbidden" by
		863	// the new p5p powers, we need to call out to a perl function :/
		864	if (ecb_expect_false (SvAMAGIC (k)))
		865	{
		866	dSP;
		867
		868	ENTER; SAVETMPS;
		869	PUSHMARK (SP);
		870	EXTEND (SP, 3);
		871	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		872	PUSHs (sv_2mortal (k));
		873	PUSHs (sv_2mortal (v));
		874
		875	PUTBACK;
		876	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		877	SPAGAIN;
		878
		879	FREETMPS; LEAVE;
		880
		881	if (SvTRUE (ERRSV))
		882	ERR_ERRSV;
		883
		884	return;
		885	}
		886
		887	hv_store_ent (hv, k, v, 0);
		888	SvREFCNT_dec (k);
		889
		890	fail:
		891	;
		892	}
		893
522	static SV *	894	static SV *
523	decode_hv (dec_t *dec)	895	decode_hv (dec_t *dec)
524	{	896	{
525	HV *hv = newHV ();	897	HV *hv = newHV ();
526		898
527	DEC_INC_DEPTH;	899	DEC_INC_DEPTH;
528		900
529	if ((*dec->cur & 31) == 31)	901	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
530	{	902	{
531	++dec->cur;	903	++dec->cur;
532		904
533	for (;;)	905	for (;;)
534	{	906	{
535	WANT (1);	907	WANT (1);
536		908
537	if (*dec->cur == (0xe0 | 31))	909	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
538	{	910	{
539	++dec->cur;	911	++dec->cur;
540	break;	912	break;
541	}	913	}
542		914
543	SV *k = decode_sv (dec);	915	decode_he (dec, hv);
544	SV *v = decode_sv (dec);
545
546	hv_store_ent (hv, k, v, 0);
547	}	916	}
548	}	917	}
549	else	918	else
550	{	919	{
551	int len = decode_uint (dec);	920	UV pairs = decode_uint (dec);
552		921
		922	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		923
553	while (len--)	924	while (pairs--)
554	{	925	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	}	926	}
561		927
562	DEC_DEC_DEPTH;	928	DEC_DEC_DEPTH;
563	return newRV_noinc ((SV *)hv);	929	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		930
720	fail:	931	fail:
721	SvREFCNT_dec (hv);	932	SvREFCNT_dec (hv);
722	DEC_DEC_DEPTH;	933	DEC_DEC_DEPTH;
723	return &PL_sv_undef;	934	return &PL_sv_undef;
724	}	935	}
725		936
726	static SV *	937	static SV *
727	decode_str (dec_t *dec, int utf8)	938	decode_str (dec_t *dec, int utf8)
728	{	939	{
729	SV *sv;	940	SV *sv = 0;
730		941
731	if ((*dec->cur & 31) == 31)	942	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
732	{	943	{
		944	// indefinite length strings
733	++dec->cur;	945	++dec->cur;
734		946
		947	U8 major = *dec->cur & MAJOR_MISC;
		948
735	sv = newSVpvn ("", 0);	949	sv = newSVpvn ("", 0);
736		950
737	// not very fast, and certainly not robust against illegal input
738	for (;;)	951	for (;;)
739	{	952	{
740	WANT (1);	953	WANT (1);
741		954
742	if (*dec->cur == (0xe0 | 31))	955	if ((*dec->cur - major) > LENGTH_EXT8)
		956	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
743	{	957	{
744	++dec->cur;	958	++dec->cur;
745	break;	959	break;
746	}	960	}
		961	else
		962	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
747		963
748	SV *sv2 = decode_sv (dec);	964	STRLEN len = decode_uint (dec);
749	sv_catsv (sv, sv2);	965
		966	WANT (len);
		967	sv_catpvn (sv, dec->cur, len);
		968	dec->cur += len;
750	}	969	}
751	}	970	}
752	else	971	else
753	{	972	{
754	STRLEN len = decode_uint (dec);	973	STRLEN len = decode_uint (dec);
755		974
756	WANT (len);	975	WANT (len);
757	sv = newSVpvn (dec->cur, len);	976	sv = newSVpvn (dec->cur, len);
758	dec->cur += len;	977	dec->cur += len;
		978
		979	if (ecb_expect_false (dec->stringref)
		980	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		981	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
759	}	982	}
760		983
761	if (utf8)	984	if (utf8)
		985	{
		986	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		987	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		988	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		989
762	SvUTF8_on (sv);	990	SvUTF8_on (sv);
		991	}
763		992
764	return sv;	993	return sv;
765		994
766	fail:	995	fail:
		996	SvREFCNT_dec (sv);
767	return &PL_sv_undef;	997	return &PL_sv_undef;
768	}	998	}
769		999
770	static SV *	1000	static SV *
771	decode_tagged (dec_t *dec)	1001	decode_tagged (dec_t *dec)
772	{	1002	{
		1003	SV *sv = 0;
773	UV tag = decode_uint (dec);	1004	UV tag = decode_uint (dec);
		1005
		1006	WANT (1);
		1007
		1008	switch (tag)
		1009	{
		1010	case CBOR_TAG_MAGIC:
774	SV *sv = decode_sv (dec);	1011	sv = decode_sv (dec);
		1012	break;
775		1013
776	if (tag == 55799) // 2.4.5 Self-Describe CBOR	1014	case CBOR_TAG_INDIRECTION:
		1015	sv = newRV_noinc (decode_sv (dec));
		1016	break;
		1017
		1018	case CBOR_TAG_STRINGREF_NAMESPACE:
		1019	{
		1020	// do nmot use SAVETMPS/FREETMPS, as these will
		1021	// erase mortalised caches, e.g. "shareable"
		1022	ENTER;
		1023
		1024	SAVESPTR (dec->stringref);
		1025	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1026
		1027	sv = decode_sv (dec);
		1028
		1029	LEAVE;
		1030	}
		1031	break;
		1032
		1033	case CBOR_TAG_STRINGREF:
		1034	{
		1035	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1036	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1037
		1038	UV idx = decode_uint (dec);
		1039
		1040	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		1041	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1042
		1043	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1044	}
		1045	break;
		1046
		1047	case CBOR_TAG_VALUE_SHAREABLE:
		1048	{
		1049	if (ecb_expect_false (!dec->shareable))
		1050	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1051
		1052	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1053	{
		1054	sv = newSV (0);
		1055	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1056
		1057	SV *osv = decode_sv (dec);
		1058	sv_setsv (sv, osv);
		1059	SvREFCNT_dec_NN (osv);
		1060	}
		1061	else
		1062	{
		1063	av_push (dec->shareable, &PL_sv_undef);
		1064	int idx = AvFILLp (dec->shareable);
		1065	sv = decode_sv (dec);
		1066	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1067	}
		1068	}
		1069	break;
		1070
		1071	case CBOR_TAG_VALUE_SHAREDREF:
		1072	{
		1073	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1074	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1075
		1076	UV idx = decode_uint (dec);
		1077
		1078	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		1079	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1080
		1081	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1082
		1083	if (sv == &PL_sv_undef)
		1084	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1085	}
		1086	break;
		1087
		1088	case CBOR_TAG_PERL_OBJECT:
		1089	{
		1090	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1091	goto filter;
		1092
		1093	sv = decode_sv (dec);
		1094
		1095	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1096	ERR ("corrupted CBOR data (non-array perl object)");
		1097
		1098	AV *av = (AV *)SvRV (sv);
		1099	int len = av_len (av) + 1;
		1100	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1101
		1102	if (!stash)
		1103	ERR ("cannot decode perl-object (package does not exist)");
		1104
		1105	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1106
		1107	if (!method)
		1108	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1109
		1110	dSP;
		1111
		1112	ENTER; SAVETMPS;
		1113	PUSHMARK (SP);
		1114	EXTEND (SP, len + 1);
		1115	// we re-bless the reference to get overload and other niceties right
		1116	PUSHs (*av_fetch (av, 0, 1));
		1117	PUSHs (sv_cbor);
		1118
		1119	int i;
		1120
		1121	for (i = 1; i < len; ++i)
		1122	PUSHs (*av_fetch (av, i, 1));
		1123
		1124	PUTBACK;
		1125	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1126	SPAGAIN;
		1127
		1128	if (SvTRUE (ERRSV))
		1129	{
		1130	FREETMPS; LEAVE;
		1131	ERR_ERRSV;
		1132	}
		1133
		1134	SvREFCNT_dec (sv);
		1135	sv = SvREFCNT_inc (POPs);
		1136
		1137	PUTBACK;
		1138
		1139	FREETMPS; LEAVE;
		1140	}
		1141	break;
		1142
		1143	default:
		1144	filter:
		1145	{
		1146	SV *tag_sv = newSVuv (tag);
		1147
		1148	sv = decode_sv (dec);
		1149
		1150	dSP;
		1151	ENTER; SAVETMPS;
		1152	SAVESTACK_POS ();
		1153	PUSHMARK (SP);
		1154	EXTEND (SP, 2);
		1155	PUSHs (tag_sv);
		1156	PUSHs (sv);
		1157
		1158	PUTBACK;
		1159	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1160	SPAGAIN;
		1161
		1162	if (SvTRUE (ERRSV))
		1163	{
		1164	SvREFCNT_dec (tag_sv);
		1165	FREETMPS; LEAVE;
		1166	ERR_ERRSV;
		1167	}
		1168
		1169	if (count)
		1170	{
		1171	SvREFCNT_dec (tag_sv);
		1172	SvREFCNT_dec (sv);
		1173	sv = SvREFCNT_inc (POPs);
		1174	}
		1175	else
		1176	{
		1177	AV *av = newAV ();
		1178	av_push (av, tag_sv);
		1179	av_push (av, sv);
		1180
		1181	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1182	? cbor_tagged_stash
		1183	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1184	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1185	}
		1186
		1187	PUTBACK;
		1188
		1189	FREETMPS; LEAVE;
		1190	}
		1191	break;
		1192	}
		1193
777	return sv;	1194	return sv;
778		1195
779	AV *av = newAV ();	1196	fail:
780	av_push (av, newSVuv (tag));	1197	SvREFCNT_dec (sv);
781	av_push (av, sv);	1198	return &PL_sv_undef;
782	return newRV_noinc ((SV *)av);
783	}	1199	}
784		1200
785	static SV *	1201	static SV *
786	decode_sv (dec_t *dec)	1202	decode_sv (dec_t *dec)
787	{	1203	{
788	WANT (1);	1204	WANT (1);
789		1205
790	switch (*dec->cur >> 5)	1206	switch (*dec->cur >> MAJOR_SHIFT)
791	{	1207	{
792	case 0: // unsigned int	1208	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
793	//TODO: 64 bit values on 3 2bit perls	1209	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
794	return newSVuv (decode_uint (dec));	1210	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
795	case 1: // negative int	1211	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
796	return newSViv (-1 - (IV)decode_uint (dec));	1212	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
797	case 2: // octet string	1213	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
798	return decode_str (dec, 0);	1214	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
799	case 3: // utf-8 string	1215
800	return decode_str (dec, 1);	1216	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)	1217	switch (*dec->cur++ & MINOR_MASK)
809	{	1218	{
810	case 20:	1219	case SIMPLE_FALSE:
811	#if CBOR_SLOW	1220	#if CBOR_SLOW
812	cbor_false = get_bool ("CBOR::XS::false");	1221	types_false = get_bool ("Types::Serialiser::false");
813	#endif	1222	#endif
814	return newSVsv (cbor_false);	1223	return newSVsv (types_false);
815	case 21:	1224	case SIMPLE_TRUE:
816	#if CBOR_SLOW	1225	#if CBOR_SLOW
817	cbor_true = get_bool ("CBOR::XS::true");	1226	types_true = get_bool ("Types::Serialiser::true");
818	#endif	1227	#endif
819	return newSVsv (cbor_true);	1228	return newSVsv (types_true);
820	case 22:	1229	case SIMPLE_NULL:
821	return newSVsv (&PL_sv_undef);	1230	return newSVsv (&PL_sv_undef);
		1231	case SIMPLE_UNDEF:
		1232	#if CBOR_SLOW
		1233	types_error = get_bool ("Types::Serialiser::error");
		1234	#endif
		1235	return newSVsv (types_error);
822		1236
823	case 25:	1237	case MISC_FLOAT16:
824	{	1238	{
825	WANT (2);	1239	WANT (2);
826		1240
827	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1241	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
828	dec->cur += 2;	1242	dec->cur += 2;
829		1243
830	return newSVnv (ecb_binary16_to_float (fp));	1244	return newSVnv (ecb_binary16_to_float (fp));
831	}	1245	}
832		1246
833	case 26:	1247	case MISC_FLOAT32:
834	{	1248	{
835	uint32_t fp;	1249	uint32_t fp;
836	WANT (4);	1250	WANT (4);
837	memcpy (&fp, dec->cur, 4);	1251	memcpy (&fp, dec->cur, 4);
838	dec->cur += 4;	1252	dec->cur += 4;
…		…
841	fp = ecb_bswap32 (fp);	1255	fp = ecb_bswap32 (fp);
842		1256
843	return newSVnv (ecb_binary32_to_float (fp));	1257	return newSVnv (ecb_binary32_to_float (fp));
844	}	1258	}
845		1259
846	case 27:	1260	case MISC_FLOAT64:
847	{	1261	{
848	uint64_t fp;	1262	uint64_t fp;
849	WANT (8);	1263	WANT (8);
850	memcpy (&fp, dec->cur, 8);	1264	memcpy (&fp, dec->cur, 8);
851	dec->cur += 8;	1265	dec->cur += 8;
…		…
854	fp = ecb_bswap64 (fp);	1268	fp = ecb_bswap64 (fp);
855		1269
856	return newSVnv (ecb_binary64_to_double (fp));	1270	return newSVnv (ecb_binary64_to_double (fp));
857	}	1271	}
858		1272
859	// 0..19 unassigned	1273	// 0..19 unassigned simple
860	// 24 reserved + unassigned (reserved values are not encodable)	1274	// 24 reserved + unassigned simple (reserved values are not encodable)
		1275	// 28-30 unassigned misc
		1276	// 31 break code
861	default:	1277	default:
862	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1278	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
863	}	1279	}
864		1280
865	break;	1281	break;
866	}	1282	}
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		1283
924	fail:	1284	fail:
925	return &PL_sv_undef;	1285	return &PL_sv_undef;
926	}	1286	}
927		1287
928	static SV *	1288	static SV *
929	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1289	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
930	{	1290	{
931	dec_t dec;	1291	dec_t dec = { 0 };
932	SV *sv;	1292	SV *sv;
		1293	STRLEN len;
		1294	char *data = SvPVbyte (string, len);
933		1295
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)	1296	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",	1297	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);	1298	(unsigned long)len, (unsigned long)cbor->max_size);
965	}
966
967	sv_utf8_downgrade (string, 0);
968		1299
969	dec.cbor = *cbor;	1300	dec.cbor = *cbor;
970	dec.cur = (U8 *)SvPVX (string);	1301	dec.cur = (U8 *)data;
971	dec.end = (U8 *)SvEND (string);	1302	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		1303
978	sv = decode_sv (&dec);	1304	sv = decode_sv (&dec);
979		1305
980	if (offset_return)	1306	if (offset_return)
981	*offset_return = dec.cur;	1307	*offset_return = dec.cur;
…		…
984	if (dec.cur != dec.end && !dec.err)	1310	if (dec.cur != dec.end && !dec.err)
985	dec.err = "garbage after CBOR object";	1311	dec.err = "garbage after CBOR object";
986		1312
987	if (dec.err)	1313	if (dec.err)
988	{	1314	{
		1315	if (dec.shareable)
		1316	{
		1317	// need to break cyclic links, which would all be in shareable
		1318	int i;
		1319	SV **svp;
		1320
		1321	for (i = av_len (dec.shareable) + 1; i--; )
		1322	if ((svp = av_fetch (dec.shareable, i, 0)))
		1323	sv_setsv (*svp, &PL_sv_undef);
		1324	}
		1325
989	SvREFCNT_dec (sv);	1326	SvREFCNT_dec (sv);
		1327
		1328	if (dec.err_sv)
		1329	sv_2mortal (dec.err_sv);
		1330
990	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1331	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
991	}	1332	}
992		1333
993	sv = sv_2mortal (sv);	1334	sv = sv_2mortal (sv);
994		1335
995	return sv;	1336	return sv;
996	}	1337	}
997		1338
		1339	/////////////////////////////////////////////////////////////////////////////
		1340	// incremental parser
		1341
		1342	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1343
		1344	// returns 0 for notyet, 1 for success or error
		1345	static int
		1346	incr_parse (CBOR *self, SV *cborstr)
		1347	{
		1348	STRLEN cur;
		1349	SvPV (cborstr, cur);
		1350
		1351	while (ecb_expect_true (self->incr_need <= cur))
		1352	{
		1353	// table of integer count bytes
		1354	static I8 incr_len[MINOR_MASK + 1] = {
		1355	0, 0, 0, 0, 0, 0, 0, 0,
		1356	0, 0, 0, 0, 0, 0, 0, 0,
		1357	0, 0, 0, 0, 0, 0, 0, 0,
		1358	1, 2, 4, 8,-1,-1,-1,-2
		1359	};
		1360
		1361	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1362	U8 m = *p & MINOR_MASK;
		1363	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1364	I8 ilen = incr_len[m];
		1365
		1366	self->incr_need = self->incr_pos + 1;
		1367
		1368	if (ecb_expect_false (ilen < 0))
		1369	{
		1370	if (m != MINOR_INDEF)
		1371	return 1; // error
		1372
		1373	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1374	{
		1375	if (count >= 0)
		1376	return 1; // error
		1377
		1378	count = 1;
		1379	}
		1380	else
		1381	{
		1382	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1383	count = -1;
		1384	}
		1385	}
		1386	else
		1387	{
		1388	self->incr_need += ilen;
		1389	if (ecb_expect_false (self->incr_need > cur))
		1390	return 0;
		1391
		1392	int major = *p >> MAJOR_SHIFT;
		1393
		1394	switch (major)
		1395	{
		1396	case MAJOR_TAG >> MAJOR_SHIFT:
		1397	++count; // tags merely prefix another value
		1398	break;
		1399
		1400	case MAJOR_BYTES >> MAJOR_SHIFT:
		1401	case MAJOR_TEXT >> MAJOR_SHIFT:
		1402	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1403	case MAJOR_MAP >> MAJOR_SHIFT:
		1404	{
		1405	UV len;
		1406
		1407	if (ecb_expect_false (ilen))
		1408	{
		1409	len = 0;
		1410
		1411	do {
		1412	len = (len << 8) | *++p;
		1413	} while (--ilen);
		1414	}
		1415	else
		1416	len = m;
		1417
		1418	switch (major)
		1419	{
		1420	case MAJOR_BYTES >> MAJOR_SHIFT:
		1421	case MAJOR_TEXT >> MAJOR_SHIFT:
		1422	self->incr_need += len;
		1423	if (ecb_expect_false (self->incr_need > cur))
		1424	return 0;
		1425
		1426	break;
		1427
		1428	case MAJOR_MAP >> MAJOR_SHIFT:
		1429	len <<= 1;
		1430	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1431	if (len)
		1432	{
		1433	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1434	count = len + 1;
		1435	}
		1436	break;
		1437	}
		1438	}
		1439	}
		1440	}
		1441
		1442	self->incr_pos = self->incr_need;
		1443
		1444	if (count > 0)
		1445	{
		1446	while (!--count)
		1447	{
		1448	if (!AvFILLp (self->incr_count))
		1449	return 1; // done
		1450
		1451	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1452	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1453	}
		1454
		1455	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1456	}
		1457	}
		1458
		1459	return 0;
		1460	}
		1461
		1462
998	/////////////////////////////////////////////////////////////////////////////	1463	/////////////////////////////////////////////////////////////////////////////
999	// XS interface functions	1464	// XS interface functions
1000		1465
1001	MODULE = CBOR::XS PACKAGE = CBOR::XS	1466	MODULE = CBOR::XS PACKAGE = CBOR::XS
1002		1467
1003	BOOT:	1468	BOOT:
1004	{	1469	{
1005	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1470	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1006	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1471	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1007		1472
1008	cbor_true = get_bool ("CBOR::XS::true");	1473	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1009	cbor_false = get_bool ("CBOR::XS::false");	1474	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1475
		1476	types_true = get_bool ("Types::Serialiser::true" );
		1477	types_false = get_bool ("Types::Serialiser::false");
		1478	types_error = get_bool ("Types::Serialiser::error");
		1479
		1480	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1481
		1482	sv_cbor = newSVpv ("CBOR", 0);
		1483	SvREADONLY_on (sv_cbor);
		1484
		1485	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
1010	}	1486	}
1011		1487
1012	PROTOTYPES: DISABLE	1488	PROTOTYPES: DISABLE
1013		1489
1014	void CLONE (...)	1490	void CLONE (...)
1015	CODE:	1491	CODE:
1016	cbor_stash = 0;	1492	cbor_stash = 0;
		1493	cbor_tagged_stash = 0;
		1494	types_error_stash = 0;
1017	cbor_boolean_stash = 0;	1495	types_boolean_stash = 0;
1018		1496
1019	void new (char *klass)	1497	void new (char *klass)
1020	PPCODE:	1498	PPCODE:
1021	{	1499	{
1022	SV *pv = NEWSV (0, sizeof (CBOR));	1500	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1030		1508
1031	void shrink (CBOR *self, int enable = 1)	1509	void shrink (CBOR *self, int enable = 1)
1032	ALIAS:	1510	ALIAS:
1033	shrink = F_SHRINK	1511	shrink = F_SHRINK
1034	allow_unknown = F_ALLOW_UNKNOWN	1512	allow_unknown = F_ALLOW_UNKNOWN
		1513	allow_sharing = F_ALLOW_SHARING
		1514	allow_cycles = F_ALLOW_CYCLES
		1515	forbid_objects = F_FORBID_OBJECTS
		1516	pack_strings = F_PACK_STRINGS
		1517	text_keys = F_TEXT_KEYS
		1518	text_strings = F_TEXT_STRINGS
		1519	validate_utf8 = F_VALIDATE_UTF8
1035	PPCODE:	1520	PPCODE:
1036	{	1521	{
1037	if (enable)	1522	if (enable)
1038	self->flags |= ix;	1523	self->flags |= ix;
1039	else	1524	else
…		…
1044		1529
1045	void get_shrink (CBOR *self)	1530	void get_shrink (CBOR *self)
1046	ALIAS:	1531	ALIAS:
1047	get_shrink = F_SHRINK	1532	get_shrink = F_SHRINK
1048	get_allow_unknown = F_ALLOW_UNKNOWN	1533	get_allow_unknown = F_ALLOW_UNKNOWN
		1534	get_allow_sharing = F_ALLOW_SHARING
		1535	get_allow_cycles = F_ALLOW_CYCLES
		1536	get_forbid_objects = F_FORBID_OBJECTS
		1537	get_pack_strings = F_PACK_STRINGS
		1538	get_text_keys = F_TEXT_KEYS
		1539	get_text_strings = F_TEXT_STRINGS
		1540	get_validate_utf8 = F_VALIDATE_UTF8
1049	PPCODE:	1541	PPCODE:
1050	XPUSHs (boolSV (self->flags & ix));	1542	XPUSHs (boolSV (self->flags & ix));
1051		1543
1052	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1544	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1053	PPCODE:	1545	PPCODE:
…		…
1069	CODE:	1561	CODE:
1070	RETVAL = self->max_size;	1562	RETVAL = self->max_size;
1071	OUTPUT:	1563	OUTPUT:
1072	RETVAL	1564	RETVAL
1073		1565
1074	#if 0 //TODO	1566	void filter (CBOR *self, SV *filter = 0)
1075
1076	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1077	PPCODE:	1567	PPCODE:
1078	{
1079	SvREFCNT_dec (self->cb_object);	1568	SvREFCNT_dec (self->filter);
1080	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1569	self->filter = filter ? newSVsv (filter) : filter;
1081
1082	XPUSHs (ST (0));	1570	XPUSHs (ST (0));
1083	}
1084		1571
1085	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1572	SV *get_filter (CBOR *self)
1086	PPCODE:	1573	CODE:
1087	{	1574	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1088	if (!self->cb_sk_object)	1575	OUTPUT:
1089	self->cb_sk_object = newHV ();	1576	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		1577
1109	void encode (CBOR *self, SV *scalar)	1578	void encode (CBOR *self, SV *scalar)
1110	PPCODE:	1579	PPCODE:
1111	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1580	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1112	XPUSHs (scalar);	1581	XPUSHs (scalar);
…		…
1125	EXTEND (SP, 2);	1594	EXTEND (SP, 2);
1126	PUSHs (sv);	1595	PUSHs (sv);
1127	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1596	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1128	}	1597	}
1129		1598
		1599	void incr_parse (CBOR *self, SV *cborstr)
		1600	ALIAS:
		1601	incr_parse_multiple = 1
		1602	PPCODE:
		1603	{
		1604	if (SvUTF8 (cborstr))
		1605	sv_utf8_downgrade (cborstr, 0);
		1606
		1607	if (!self->incr_count)
		1608	{
		1609	self->incr_count = newAV ();
		1610	self->incr_pos = 0;
		1611	self->incr_need = 1;
		1612
		1613	av_push (self->incr_count, newSViv (1));
		1614	}
		1615
		1616	do
		1617	{
		1618	if (!incr_parse (self, cborstr))
		1619	{
		1620	if (self->incr_need > self->max_size && self->max_size)
		1621	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1622	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1623
		1624	break;
		1625	}
		1626
		1627	SV *sv;
		1628	char *offset;
		1629
		1630	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1631	XPUSHs (sv);
		1632
		1633	sv_chop (cborstr, offset);
		1634
		1635	av_clear (self->incr_count);
		1636	av_push (self->incr_count, newSViv (1));
		1637
		1638	self->incr_pos = 0;
		1639	self->incr_need = self->incr_pos + 1;
		1640	}
		1641	while (ix);
		1642	}
		1643
		1644	void incr_reset (CBOR *self)
		1645	CODE:
		1646	{
		1647	SvREFCNT_dec (self->incr_count);
		1648	self->incr_count = 0;
		1649	}
		1650
1130	void DESTROY (CBOR *self)	1651	void DESTROY (CBOR *self)
1131	CODE:	1652	PPCODE:
1132	SvREFCNT_dec (self->cb_sk_object);	1653	cbor_free (self);
1133	SvREFCNT_dec (self->cb_object);
1134		1654
1135	PROTOTYPES: ENABLE	1655	PROTOTYPES: ENABLE
1136		1656
1137	void encode_cbor (SV *scalar)	1657	void encode_cbor (SV *scalar)
		1658	ALIAS:
		1659	encode_cbor = 0
		1660	encode_cbor_sharing = F_ALLOW_SHARING
1138	PPCODE:	1661	PPCODE:
1139	{	1662	{
1140	CBOR cbor;	1663	CBOR cbor;
1141	cbor_init (&cbor);	1664	cbor_init (&cbor);
		1665	cbor.flags |= ix;
1142	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1666	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1143	XPUSHs (scalar);	1667	XPUSHs (scalar);
1144	}	1668	}
1145		1669
1146	void decode_cbor (SV *cborstr)	1670	void decode_cbor (SV *cborstr)

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