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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.8 by root, Sun Oct 27 10:12:01 2013 UTC vs.
Revision 1.58 by root, Fri Nov 25 13:27:29 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
14	// known tags, rfc7049	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
15	enum cbor_tag	67	enum cbor_tag
16	{	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
17	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	79	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
18	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	80	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
19	CBOR_TAG_POS_BIGNUM = 2, // byte string	81	CBOR_TAG_POS_BIGNUM = 2, // byte string
20	CBOR_TAG_NEG_BIGNUM = 3, // byte string	82	CBOR_TAG_NEG_BIGNUM = 3, // byte string
21	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	83	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
22	CBOR_TAG_BIGFLOAT = 5, // array	84	CBOR_TAG_BIGFLOAT = 5, // array
23		85
24	CBOR_TAG_CONV_B64U = 21, // base64url, any	86	CBOR_TAG_CONV_B64U = 21, // base64url, any
25	CBOR_TAG_CONV_B64 = 22, // base64, any	87	CBOR_TAG_CONV_B64 = 22, // base64, any
26	CBOR_TAG_CONV_HEX = 23, // base16, any	88	CBOR_TAG_CONV_HEX = 23, // base16, any
27	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	89	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
28		90
29	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	91	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
30	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	92	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
31	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	93	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
32	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	94	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
33	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	95	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
34		96
35	CBOR_TAG_MAGIC = 55799	97	CBOR_TAG_MAGIC = 55799, // self-describe cbor
36	};	98	};
37		99
38	#define F_SHRINK 0x00000200UL	100	#define F_SHRINK 0x00000001UL
39	#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_TEXT_KEYS 0x00000020UL
		106	#define F_TEXT_STRINGS 0x00000040UL
		107	#define F_VALIDATE_UTF8 0x00000080UL
40		108
41	#define INIT_SIZE 32 // initial scalar size to be allocated	109	#define INIT_SIZE 32 // initial scalar size to be allocated
42		110
43	#define SB do {	111	#define SB do {
44	#define SE } while (0)	112	#define SE } while (0)
…		…
55	#else	123	#else
56	# define CBOR_SLOW 0	124	# define CBOR_SLOW 0
57	# define CBOR_STASH cbor_stash	125	# define CBOR_STASH cbor_stash
58	#endif	126	#endif
59		127
60	static HV *cbor_stash, *cbor_boolean_stash, *cbor_tagged_stash; // CBOR::XS::	128	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
61	static SV *cbor_true, *cbor_false;	129	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
62		130
63	typedef struct {	131	typedef struct {
64	U32 flags;	132	U32 flags;
65	U32 max_depth;	133	U32 max_depth;
66	STRLEN max_size;	134	STRLEN max_size;
		135	SV *filter;
		136
		137	// for the incremental parser
		138	STRLEN incr_pos; // the current offset into the text
		139	STRLEN incr_need; // minimum bytes needed to decode
		140	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
67	} CBOR;	141	} CBOR;
68		142
69	ecb_inline void	143	ecb_inline void
70	cbor_init (CBOR *cbor)	144	cbor_init (CBOR *cbor)
71	{	145	{
72	Zero (cbor, 1, CBOR);	146	Zero (cbor, 1, CBOR);
73	cbor->max_depth = 512;	147	cbor->max_depth = 512;
		148	}
		149
		150	ecb_inline void
		151	cbor_free (CBOR *cbor)
		152	{
		153	SvREFCNT_dec (cbor->filter);
		154	SvREFCNT_dec (cbor->incr_count);
74	}	155	}
75		156
76	/////////////////////////////////////////////////////////////////////////////	157	/////////////////////////////////////////////////////////////////////////////
77	// utility functions	158	// utility functions
78		159
…		…
100	SvPV_renew (sv, SvCUR (sv) + 1);	181	SvPV_renew (sv, SvCUR (sv) + 1);
101	#endif	182	#endif
102	}	183	}
103	}	184	}
104		185
105	/////////////////////////////////////////////////////////////////////////////	186	// minimum length of a string to be registered for stringref
106	// fp hell	187	ecb_inline int
107		188	minimum_string_length (UV idx)
108	//TODO	189	{
		190	return idx > 23
		191	? idx > 0xffU
		192	? idx > 0xffffU
		193	? idx > 0xffffffffU
		194	? 11
		195	: 7
		196	: 5
		197	: 4
		198	: 3;
		199	}
109		200
110	/////////////////////////////////////////////////////////////////////////////	201	/////////////////////////////////////////////////////////////////////////////
111	// encoder	202	// encoder
112		203
113	// structure used for encoding CBOR	204	// structure used for encoding CBOR
…		…
116	char *cur; // SvPVX (sv) + current output position	207	char *cur; // SvPVX (sv) + current output position
117	char *end; // SvEND (sv)	208	char *end; // SvEND (sv)
118	SV *sv; // result scalar	209	SV *sv; // result scalar
119	CBOR cbor;	210	CBOR cbor;
120	U32 depth; // recursion level	211	U32 depth; // recursion level
		212	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		213	UV stringref_idx;
		214	HV *shareable; // ptr => index, or 0
		215	UV shareable_idx;
121	} enc_t;	216	} enc_t;
122		217
123	ecb_inline void	218	ecb_inline void
124	need (enc_t *enc, STRLEN len)	219	need (enc_t *enc, STRLEN len)
125	{	220	{
…		…
142	static void	237	static void
143	encode_uint (enc_t *enc, int major, UV len)	238	encode_uint (enc_t *enc, int major, UV len)
144	{	239	{
145	need (enc, 9);	240	need (enc, 9);
146		241
147	if (len < 24)	242	if (ecb_expect_true (len < LENGTH_EXT1))
148	*enc->cur++ = major | len;	243	*enc->cur++ = major | len;
149	else if (len <= 0xff)	244	else if (ecb_expect_true (len <= 0xffU))
150	{	245	{
151	*enc->cur++ = major | 24;	246	*enc->cur++ = major | LENGTH_EXT1;
152	*enc->cur++ = len;	247	*enc->cur++ = len;
153	}	248	}
154	else if (len <= 0xffff)	249	else if (len <= 0xffffU)
155	{	250	{
156	*enc->cur++ = major | 25;	251	*enc->cur++ = major | LENGTH_EXT2;
157	*enc->cur++ = len >> 8;	252	*enc->cur++ = len >> 8;
158	*enc->cur++ = len;	253	*enc->cur++ = len;
159	}	254	}
160	else if (len <= 0xffffffff)	255	else if (len <= 0xffffffffU)
161	{	256	{
162	*enc->cur++ = major | 26;	257	*enc->cur++ = major | LENGTH_EXT4;
163	*enc->cur++ = len >> 24;	258	*enc->cur++ = len >> 24;
164	*enc->cur++ = len >> 16;	259	*enc->cur++ = len >> 16;
165	*enc->cur++ = len >> 8;	260	*enc->cur++ = len >> 8;
166	*enc->cur++ = len;	261	*enc->cur++ = len;
167	}	262	}
168	else	263	else
169	{	264	{
170	*enc->cur++ = major | 27;	265	*enc->cur++ = major | LENGTH_EXT8;
171	*enc->cur++ = len >> 56;	266	*enc->cur++ = len >> 56;
172	*enc->cur++ = len >> 48;	267	*enc->cur++ = len >> 48;
173	*enc->cur++ = len >> 40;	268	*enc->cur++ = len >> 40;
174	*enc->cur++ = len >> 32;	269	*enc->cur++ = len >> 32;
175	*enc->cur++ = len >> 24;	270	*enc->cur++ = len >> 24;
…		…
177	*enc->cur++ = len >> 8;	272	*enc->cur++ = len >> 8;
178	*enc->cur++ = len;	273	*enc->cur++ = len;
179	}	274	}
180	}	275	}
181		276
182	static void	277	ecb_inline void
		278	encode_tag (enc_t *enc, UV tag)
		279	{
		280	encode_uint (enc, MAJOR_TAG, tag);
		281	}
		282
		283	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		284	ecb_noinline static void
183	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	285	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
184	{	286	{
185	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	287	STRLEN ulen = len;
		288	U8 *p, *pend = (U8 *)str + len;
		289
		290	for (p = (U8 *)str; p < pend; ++p)
		291	ulen += *p >> 7; // count set high bits
		292
		293	encode_uint (enc, MAJOR_TEXT, ulen);
		294
		295	need (enc, ulen);
		296	for (p = (U8 *)str; p < pend; ++p)
		297	if (*p < 0x80)
		298	*enc->cur++ = *p;
		299	else
		300	{
		301	*enc->cur++ = 0xc0 + (*p >> 6);
		302	*enc->cur++ = 0x80 + (*p & 63);
		303	}
		304	}
		305
		306	ecb_inline void
		307	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		308	{
		309	if (ecb_expect_false (upgrade_utf8))
		310	if (!utf8)
		311	{
		312	encode_str_utf8 (enc, utf8, str, len);
		313	return;
		314	}
		315
		316	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
186	need (enc, len);	317	need (enc, len);
187	memcpy (enc->cur, str, len);	318	memcpy (enc->cur, str, len);
188	enc->cur += len;	319	enc->cur += len;
189	}	320	}
190		321
		322	ecb_inline void
		323	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		324	{
		325	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		326	{
		327	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		328
		329	if (SvOK (*svp))
		330	{
		331	// already registered, use stringref
		332	encode_tag (enc, CBOR_TAG_STRINGREF);
		333	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		334	return;
		335	}
		336	else if (len >= minimum_string_length (enc->stringref_idx))
		337	{
		338	// register only
		339	sv_setuv (*svp, enc->stringref_idx);
		340	++enc->stringref_idx;
		341	}
		342	}
		343
		344	encode_str (enc, upgrade_utf8, utf8, str, len);
		345	}
		346
191	static void encode_sv (enc_t *enc, SV *sv);	347	static void encode_sv (enc_t *enc, SV *sv);
192		348
193	static void	349	static void
194	encode_av (enc_t *enc, AV *av)	350	encode_av (enc_t *enc, AV *av)
195	{	351	{
…		…
198	if (enc->depth >= enc->cbor.max_depth)	354	if (enc->depth >= enc->cbor.max_depth)
199	croak (ERR_NESTING_EXCEEDED);	355	croak (ERR_NESTING_EXCEEDED);
200		356
201	++enc->depth;	357	++enc->depth;
202		358
203	encode_uint (enc, 0x80, len + 1);	359	encode_uint (enc, MAJOR_ARRAY, len + 1);
204		360
		361	if (SvMAGICAL (av))
205	for (i = 0; i <= len; ++i)	362	for (i = 0; i <= len; ++i)
206	{	363	{
207	SV **svp = av_fetch (av, i, 0);	364	SV **svp = av_fetch (av, i, 0);
208	encode_sv (enc, svp ? *svp : &PL_sv_undef);	365	encode_sv (enc, svp ? *svp : &PL_sv_undef);
209	}	366	}
		367	else
		368	for (i = 0; i <= len; ++i)
		369	{
		370	SV *sv = AvARRAY (av)[i];
		371	encode_sv (enc, sv ? sv : &PL_sv_undef);
		372	}
210		373
211	--enc->depth;	374	--enc->depth;
212	}	375	}
213		376
214	static void	377	static void
…		…
223		386
224	int pairs = hv_iterinit (hv);	387	int pairs = hv_iterinit (hv);
225	int mg = SvMAGICAL (hv);	388	int mg = SvMAGICAL (hv);
226		389
227	if (mg)	390	if (mg)
228	encode_ch (enc, 0xa0 | 31);	391	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
229	else	392	else
230	encode_uint (enc, 0xa0, pairs);	393	encode_uint (enc, MAJOR_MAP, pairs);
231		394
232	while ((he = hv_iternext (hv)))	395	while ((he = hv_iternext (hv)))
233	{	396	{
234	if (HeKLEN (he) == HEf_SVKEY)	397	if (HeKLEN (he) == HEf_SVKEY)
235	encode_sv (enc, HeSVKEY (he));	398	encode_sv (enc, HeSVKEY (he));
236	else	399	else
237	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	400	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
238		401
239	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	402	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
240	}	403	}
241		404
242	if (mg)	405	if (mg)
243	encode_ch (enc, 0xe0 | 31);	406	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
244		407
245	--enc->depth;	408	--enc->depth;
246	}	409	}
247		410
248	// encode objects, arrays and special \0=false and \1=true values.	411	// encode objects, arrays and special \0=false and \1=true values.
249	static void	412	static void
250	encode_rv (enc_t *enc, SV *sv)	413	encode_rv (enc_t *enc, SV *sv)
251	{	414	{
252	svtype svt;
253
254	SvGETMAGIC (sv);	415	SvGETMAGIC (sv);
		416
255	svt = SvTYPE (sv);	417	svtype svt = SvTYPE (sv);
256		418
257	if (ecb_expect_false (SvOBJECT (sv)))	419	if (ecb_expect_false (SvOBJECT (sv)))
258	{	420	{
259	HV *boolean_stash = !CBOR_SLOW || cbor_boolean_stash	421	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
260	? cbor_boolean_stash	422	? types_boolean_stash
261	: gv_stashpv ("CBOR::XS::Boolean", 1);	423	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		424	HV *error_stash = !CBOR_SLOW || types_error_stash
		425	? types_error_stash
		426	: gv_stashpv ("Types::Serialiser::Error", 1);
262	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	427	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
263	? cbor_tagged_stash	428	? cbor_tagged_stash
264	: gv_stashpv ("CBOR::XS::Tagged" , 1);	429	: gv_stashpv ("CBOR::XS::Tagged" , 1);
265		430
		431	HV *stash = SvSTASH (sv);
		432
266	if (SvSTASH (sv) == boolean_stash)	433	if (stash == boolean_stash)
267	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	434	{
		435	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		436	return;
		437	}
		438	else if (stash == error_stash)
		439	{
		440	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		441	return;
		442	}
268	else if (SvSTASH (sv) == tagged_stash)	443	else if (stash == tagged_stash)
269	{	444	{
270	if (svt != SVt_PVAV)	445	if (svt != SVt_PVAV)
271	croak ("encountered CBOR::XS::Tagged object that isn't an array");	446	croak ("encountered CBOR::XS::Tagged object that isn't an array");
272		447
273	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	448	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
274	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));	449	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		450
		451	return;
		452	}
		453	}
		454
		455	if (ecb_expect_false (SvREFCNT (sv) > 1)
		456	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		457	{
		458	if (!enc->shareable)
		459	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		460
		461	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		462
		463	if (SvOK (*svp))
		464	{
		465	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		466	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		467	return;
275	}	468	}
276	else	469	else
277	{	470	{
		471	sv_setuv (*svp, enc->shareable_idx);
		472	++enc->shareable_idx;
		473	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		474	}
		475	}
		476
		477	if (ecb_expect_false (SvOBJECT (sv)))
		478	{
		479	HV *stash = SvSTASH (sv);
		480	GV *method;
		481
		482	if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
		483	{
		484	dSP;
		485
		486	ENTER; SAVETMPS;
		487	PUSHMARK (SP);
278	// we re-bless the reference to get overload and other niceties right	488	// we re-bless the reference to get overload and other niceties right
279	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
280
281	if (to_cbor)
282	{
283	dSP;
284
285	ENTER; SAVETMPS; PUSHMARK (SP);
286	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	489	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
287		490
288	// calling with G_SCALAR ensures that we always get a 1 return value
289	PUTBACK;	491	PUTBACK;
		492	// G_SCALAR ensures that return value is 1
290	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	493	call_sv ((SV *)GvCV (method), G_SCALAR);
291	SPAGAIN;	494	SPAGAIN;
292		495
293	// catch this surprisingly common error	496	// catch this surprisingly common error
294	if (SvROK (TOPs) && SvRV (TOPs) == sv)	497	if (SvROK (TOPs) && SvRV (TOPs) == sv)
295	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	498	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
296		499
297	sv = POPs;	500	encode_sv (enc, POPs);
		501
298	PUTBACK;	502	PUTBACK;
299		503
300	encode_sv (enc, sv);
301
302	FREETMPS; LEAVE;	504	FREETMPS; LEAVE;
303	}	505	}
		506	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
		507	{
		508	dSP;
		509
		510	ENTER; SAVETMPS;
		511	SAVESTACK_POS ();
		512	PUSHMARK (SP);
		513	EXTEND (SP, 2);
		514	// we re-bless the reference to get overload and other niceties right
		515	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		516	PUSHs (sv_cbor);
		517
		518	PUTBACK;
		519	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		520	SPAGAIN;
		521
		522	// catch this surprisingly common error
		523	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		524	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		525
		526	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		527	encode_uint (enc, MAJOR_ARRAY, count + 1);
		528	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		529
		530	while (count)
		531	encode_sv (enc, SP[1 - count--]);
		532
		533	PUTBACK;
		534
		535	FREETMPS; LEAVE;
		536	}
304	else	537	else
305	croak ("encountered object '%s', but no TO_CBOR method available on it",	538	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
306	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	539	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
307	}
308	}	540	}
309	else if (svt == SVt_PVHV)	541	else if (svt == SVt_PVHV)
310	encode_hv (enc, (HV *)sv);	542	encode_hv (enc, (HV *)sv);
311	else if (svt == SVt_PVAV)	543	else if (svt == SVt_PVAV)
312	encode_av (enc, (AV *)sv);	544	encode_av (enc, (AV *)sv);
313	else if (svt < SVt_PVAV)
314	{
315	STRLEN len = 0;
316	char *pv = svt ? SvPV (sv, len) : 0;
317
318	if (len == 1 && *pv == '1')
319	encode_ch (enc, 0xe0 | 21);
320	else if (len == 1 && *pv == '0')
321	encode_ch (enc, 0xe0 | 20);
322	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
323	encode_ch (enc, 0xe0 | 23);
324	else
325	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
326	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
327	}
328	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
329	encode_ch (enc, 0xe0 | 23);
330	else	545	else
331	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	546	{
332	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	547	encode_tag (enc, CBOR_TAG_INDIRECTION);
		548	encode_sv (enc, sv);
		549	}
333	}	550	}
334		551
335	static void	552	static void
336	encode_nv (enc_t *enc, SV *sv)	553	encode_nv (enc_t *enc, SV *sv)
337	{	554	{
338	double nv = SvNVX (sv);	555	double nv = SvNVX (sv);
339		556
340	need (enc, 9);	557	need (enc, 9);
341		558
342	if (ecb_expect_false (nv == (U32)nv))	559	if (ecb_expect_false (nv == (NV)(U32)nv))
343	encode_uint (enc, 0x00, (U32)nv);	560	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
344	//TODO: maybe I32?	561	//TODO: maybe I32?
345	else if (ecb_expect_false (nv == (float)nv))	562	else if (ecb_expect_false (nv == (float)nv))
346	{	563	{
347	uint32_t fp = ecb_float_to_binary32 (nv);	564	uint32_t fp = ecb_float_to_binary32 (nv);
348		565
349	*enc->cur++ = 0xe0 | 26;	566	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
350		567
351	if (!ecb_big_endian ())	568	if (!ecb_big_endian ())
352	fp = ecb_bswap32 (fp);	569	fp = ecb_bswap32 (fp);
353		570
354	memcpy (enc->cur, &fp, 4);	571	memcpy (enc->cur, &fp, 4);
…		…
356	}	573	}
357	else	574	else
358	{	575	{
359	uint64_t fp = ecb_double_to_binary64 (nv);	576	uint64_t fp = ecb_double_to_binary64 (nv);
360		577
361	*enc->cur++ = 0xe0 | 27;	578	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
362		579
363	if (!ecb_big_endian ())	580	if (!ecb_big_endian ())
364	fp = ecb_bswap64 (fp);	581	fp = ecb_bswap64 (fp);
365		582
366	memcpy (enc->cur, &fp, 8);	583	memcpy (enc->cur, &fp, 8);
…		…
375		592
376	if (SvPOKp (sv))	593	if (SvPOKp (sv))
377	{	594	{
378	STRLEN len;	595	STRLEN len;
379	char *str = SvPV (sv, len);	596	char *str = SvPV (sv, len);
380	encode_str (enc, SvUTF8 (sv), str, len);	597	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
381	}	598	}
382	else if (SvNOKp (sv))	599	else if (SvNOKp (sv))
383	encode_nv (enc, sv);	600	encode_nv (enc, sv);
384	else if (SvIOKp (sv))	601	else if (SvIOKp (sv))
385	{	602	{
386	if (SvIsUV (sv))	603	if (SvIsUV (sv))
387	encode_uint (enc, 0x00, SvUVX (sv));	604	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
388	else if (SvIVX (sv) >= 0)	605	else if (SvIVX (sv) >= 0)
389	encode_uint (enc, 0x00, SvIVX (sv));	606	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
390	else	607	else
391	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	608	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
392	}	609	}
393	else if (SvROK (sv))	610	else if (SvROK (sv))
394	encode_rv (enc, SvRV (sv));	611	encode_rv (enc, SvRV (sv));
395	else if (!SvOK (sv))	612	else if (!SvOK (sv))
396	encode_ch (enc, 0xe0 | 22);	613	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
397	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	614	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
398	encode_ch (enc, 0xe0 | 23);	615	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
399	else	616	else
400	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	617	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
401	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	618	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
402	}	619	}
403		620
404	static SV *	621	static SV *
405	encode_cbor (SV *scalar, CBOR *cbor)	622	encode_cbor (SV *scalar, CBOR *cbor)
406	{	623	{
407	enc_t enc;	624	enc_t enc = { 0 };
408		625
409	enc.cbor = *cbor;	626	enc.cbor = *cbor;
410	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	627	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
411	enc.cur = SvPVX (enc.sv);	628	enc.cur = SvPVX (enc.sv);
412	enc.end = SvEND (enc.sv);	629	enc.end = SvEND (enc.sv);
413	enc.depth = 0;
414		630
415	SvPOK_only (enc.sv);	631	SvPOK_only (enc.sv);
		632
		633	if (cbor->flags & F_PACK_STRINGS)
		634	{
		635	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		636	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		637	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		638	}
		639
416	encode_sv (&enc, scalar);	640	encode_sv (&enc, scalar);
417		641
418	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	642	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
419	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	643	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
420		644
…		…
434	U8 *end; // end of input string	658	U8 *end; // end of input string
435	const char *err; // parse error, if != 0	659	const char *err; // parse error, if != 0
436	CBOR cbor;	660	CBOR cbor;
437	U32 depth; // recursion depth	661	U32 depth; // recursion depth
438	U32 maxdepth; // recursion depth limit	662	U32 maxdepth; // recursion depth limit
		663	AV *shareable;
		664	AV *stringref;
		665	SV *decode_tagged;
439	} dec_t;	666	} dec_t;
440		667
441	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	668	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE
442		669
443	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	670	#define WANT(len) if (ecb_expect_false ((UV)(dec->end - dec->cur) < (UV)len)) ERR ("unexpected end of CBOR data")
444		671
445	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	672	#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED)
446	#define DEC_DEC_DEPTH --dec->depth	673	#define DEC_DEC_DEPTH --dec->depth
447		674
448	static UV	675	static UV
449	decode_uint (dec_t *dec)	676	decode_uint (dec_t *dec)
450	{	677	{
451	switch (*dec->cur & 31)	678	U8 m = *dec->cur & MINOR_MASK;
452	{	679	++dec->cur;
453	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
454	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
455	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
456	return *dec->cur++ & 31;
457		680
458	case 24:	681	if (ecb_expect_true (m < LENGTH_EXT1))
		682	return m;
		683	else if (ecb_expect_true (m == LENGTH_EXT1))
		684	{
459	WANT (2);	685	WANT (1);
460	dec->cur += 2;	686	dec->cur += 1;
461	return dec->cur[-1];	687	return dec->cur[-1];
462		688	}
463	case 25:	689	else if (ecb_expect_true (m == LENGTH_EXT2))
		690	{
464	WANT (3);	691	WANT (2);
465	dec->cur += 3;	692	dec->cur += 2;
466	return (((UV)dec->cur[-2]) << 8)	693	return (((UV)dec->cur[-2]) << 8)
467	| ((UV)dec->cur[-1]);	694	| ((UV)dec->cur[-1]);
468		695	}
469	case 26:	696	else if (ecb_expect_true (m == LENGTH_EXT4))
		697	{
470	WANT (5);	698	WANT (4);
471	dec->cur += 5;	699	dec->cur += 4;
472	return (((UV)dec->cur[-4]) << 24)	700	return (((UV)dec->cur[-4]) << 24)
473	| (((UV)dec->cur[-3]) << 16)	701	| (((UV)dec->cur[-3]) << 16)
474	| (((UV)dec->cur[-2]) << 8)	702	| (((UV)dec->cur[-2]) << 8)
475	| ((UV)dec->cur[-1]);	703	| ((UV)dec->cur[-1]);
476		704	}
477	case 27:	705	else if (ecb_expect_true (m == LENGTH_EXT8))
		706	{
478	WANT (9);	707	WANT (8);
479	dec->cur += 9;	708	dec->cur += 8;
		709
		710	return
		711	#if UVSIZE < 8
		712	0
		713	#else
480	return (((UV)dec->cur[-8]) << 56)	714	(((UV)dec->cur[-8]) << 56)
481	| (((UV)dec->cur[-7]) << 48)	715	| (((UV)dec->cur[-7]) << 48)
482	| (((UV)dec->cur[-6]) << 40)	716	| (((UV)dec->cur[-6]) << 40)
483	| (((UV)dec->cur[-5]) << 32)	717	| (((UV)dec->cur[-5]) << 32)
		718	#endif
484	| (((UV)dec->cur[-4]) << 24)	719	| (((UV)dec->cur[-4]) << 24)
485	| (((UV)dec->cur[-3]) << 16)	720	| (((UV)dec->cur[-3]) << 16)
486	| (((UV)dec->cur[-2]) << 8)	721	| (((UV)dec->cur[-2]) << 8)
487	| ((UV)dec->cur[-1]);	722	| ((UV)dec->cur[-1]);
488		723	}
489	default:	724	else
490	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	725	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
491	}
492		726
493	fail:	727	fail:
494	return 0;	728	return 0;
495	}	729	}
496		730
…		…
501	{	735	{
502	AV *av = newAV ();	736	AV *av = newAV ();
503		737
504	DEC_INC_DEPTH;	738	DEC_INC_DEPTH;
505		739
506	if ((*dec->cur & 31) == 31)	740	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
507	{	741	{
508	++dec->cur;	742	++dec->cur;
509		743
510	for (;;)	744	for (;;)
511	{	745	{
512	WANT (1);	746	WANT (1);
513		747
514	if (*dec->cur == (0xe0 | 31))	748	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
515	{	749	{
516	++dec->cur;	750	++dec->cur;
517	break;	751	break;
518	}	752	}
519		753
520	av_push (av, decode_sv (dec));	754	av_push (av, decode_sv (dec));
521	}	755	}
522	}	756	}
523	else	757	else
524	{	758	{
525	int i, len = decode_uint (dec);	759	UV i, len = decode_uint (dec);
526		760
		761	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
527	av_fill (av, len - 1);	762	av_fill (av, len - 1);
528		763
529	for (i = 0; i < len; ++i)	764	for (i = 0; i < len; ++i)
530	AvARRAY (av)[i] = decode_sv (dec);	765	AvARRAY (av)[i] = decode_sv (dec);
531	}	766	}
…		…
537	SvREFCNT_dec (av);	772	SvREFCNT_dec (av);
538	DEC_DEC_DEPTH;	773	DEC_DEC_DEPTH;
539	return &PL_sv_undef;	774	return &PL_sv_undef;
540	}	775	}
541		776
		777	static void
		778	decode_he (dec_t *dec, HV *hv)
		779	{
		780	// for speed reasons, we specialcase single-string
		781	// byte or utf-8 strings as keys, but only when !stringref
		782
		783	if (ecb_expect_true (!dec->stringref))
		784	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		785	{
		786	STRLEN len = decode_uint (dec);
		787	char *key = (char *)dec->cur;
		788
		789	WANT (len);
		790	dec->cur += len;
		791
		792	hv_store (hv, key, len, decode_sv (dec), 0);
		793
		794	return;
		795	}
		796	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		797	{
		798	STRLEN len = decode_uint (dec);
		799	char *key = (char *)dec->cur;
		800
		801	WANT (len);
		802	dec->cur += len;
		803
		804	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		805	if (!is_utf8_string (key, len))
		806	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		807
		808	hv_store (hv, key, -len, decode_sv (dec), 0);
		809
		810	return;
		811	}
		812
		813	SV *k = decode_sv (dec);
		814	SV *v = decode_sv (dec);
		815
		816	hv_store_ent (hv, k, v, 0);
		817	SvREFCNT_dec (k);
		818
		819	fail:
		820	;
		821	}
		822
542	static SV *	823	static SV *
543	decode_hv (dec_t *dec)	824	decode_hv (dec_t *dec)
544	{	825	{
545	HV *hv = newHV ();	826	HV *hv = newHV ();
546		827
547	DEC_INC_DEPTH;	828	DEC_INC_DEPTH;
548		829
549	if ((*dec->cur & 31) == 31)	830	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
550	{	831	{
551	++dec->cur;	832	++dec->cur;
552		833
553	for (;;)	834	for (;;)
554	{	835	{
555	WANT (1);	836	WANT (1);
556		837
557	if (*dec->cur == (0xe0 | 31))	838	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
558	{	839	{
559	++dec->cur;	840	++dec->cur;
560	break;	841	break;
561	}	842	}
562		843
563	SV *k = decode_sv (dec);	844	decode_he (dec, hv);
564	SV *v = decode_sv (dec);
565
566	hv_store_ent (hv, k, v, 0);
567	}	845	}
568	}	846	}
569	else	847	else
570	{	848	{
571	int len = decode_uint (dec);	849	UV pairs = decode_uint (dec);
572		850
		851	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		852
573	while (len--)	853	while (pairs--)
574	{	854	decode_he (dec, hv);
575	SV *k = decode_sv (dec);
576	SV *v = decode_sv (dec);
577
578	hv_store_ent (hv, k, v, 0);
579	}
580	}	855	}
581		856
582	DEC_DEC_DEPTH;	857	DEC_DEC_DEPTH;
583	return newRV_noinc ((SV *)hv);	858	return newRV_noinc ((SV *)hv);
584		859
…		…
591	static SV *	866	static SV *
592	decode_str (dec_t *dec, int utf8)	867	decode_str (dec_t *dec, int utf8)
593	{	868	{
594	SV *sv = 0;	869	SV *sv = 0;
595		870
596	if ((*dec->cur & 31) == 31)	871	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
597	{	872	{
		873	// indefinite length strings
598	++dec->cur;	874	++dec->cur;
599		875
		876	U8 major = *dec->cur & MAJOR_MISC;
		877
600	sv = newSVpvn ("", 0);	878	sv = newSVpvn ("", 0);
601		879
602	// not very fast, and certainly not robust against illegal input
603	for (;;)	880	for (;;)
604	{	881	{
605	WANT (1);	882	WANT (1);
606		883
607	if (*dec->cur == (0xe0 | 31))	884	if ((*dec->cur - major) > LENGTH_EXT8)
		885	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
608	{	886	{
609	++dec->cur;	887	++dec->cur;
610	break;	888	break;
611	}	889	}
		890	else
		891	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
612		892
613	sv_catsv (sv, decode_sv (dec));	893	STRLEN len = decode_uint (dec);
		894
		895	WANT (len);
		896	sv_catpvn (sv, dec->cur, len);
		897	dec->cur += len;
614	}	898	}
615	}	899	}
616	else	900	else
617	{	901	{
618	STRLEN len = decode_uint (dec);	902	STRLEN len = decode_uint (dec);
619		903
620	WANT (len);	904	WANT (len);
621	sv = newSVpvn (dec->cur, len);	905	sv = newSVpvn (dec->cur, len);
622	dec->cur += len;	906	dec->cur += len;
		907
		908	if (ecb_expect_false (dec->stringref)
		909	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		910	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
623	}	911	}
624		912
625	if (utf8)	913	if (utf8)
		914	{
		915	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		916	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		917	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		918
626	SvUTF8_on (sv);	919	SvUTF8_on (sv);
		920	}
627		921
628	return sv;	922	return sv;
629		923
630	fail:	924	fail:
631	SvREFCNT_dec (sv);	925	SvREFCNT_dec (sv);
…		…
633	}	927	}
634		928
635	static SV *	929	static SV *
636	decode_tagged (dec_t *dec)	930	decode_tagged (dec_t *dec)
637	{	931	{
		932	SV *sv = 0;
638	UV tag = decode_uint (dec);	933	UV tag = decode_uint (dec);
		934
		935	WANT (1);
		936
		937	switch (tag)
		938	{
		939	case CBOR_TAG_MAGIC:
639	SV *sv = decode_sv (dec);	940	sv = decode_sv (dec);
		941	break;
640		942
641	if (tag == CBOR_TAG_MAGIC) // 2.4.5 Self-Describe CBOR	943	case CBOR_TAG_INDIRECTION:
		944	sv = newRV_noinc (decode_sv (dec));
		945	break;
		946
		947	case CBOR_TAG_STRINGREF_NAMESPACE:
		948	{
		949	// do nmot use SAVETMPS/FREETMPS, as these will
		950	// erase mortalised caches, e.g. "shareable"
		951	ENTER;
		952
		953	SAVESPTR (dec->stringref);
		954	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		955
		956	sv = decode_sv (dec);
		957
		958	LEAVE;
		959	}
		960	break;
		961
		962	case CBOR_TAG_STRINGREF:
		963	{
		964	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		965	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		966
		967	UV idx = decode_uint (dec);
		968
		969	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		970	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		971
		972	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		973	}
		974	break;
		975
		976	case CBOR_TAG_VALUE_SHAREABLE:
		977	{
		978	if (ecb_expect_false (!dec->shareable))
		979	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		980
		981	if (dec->cbor.flags & F_ALLOW_CYCLES)
		982	{
		983	sv = newSV (0);
		984	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		985
		986	SV *osv = decode_sv (dec);
		987	sv_setsv (sv, osv);
		988	SvREFCNT_dec_NN (osv);
		989	}
		990	else
		991	{
		992	av_push (dec->shareable, &PL_sv_undef);
		993	int idx = AvFILLp (dec->shareable);
		994	sv = decode_sv (dec);
		995	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		996	}
		997	}
		998	break;
		999
		1000	case CBOR_TAG_VALUE_SHAREDREF:
		1001	{
		1002	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1003	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1004
		1005	UV idx = decode_uint (dec);
		1006
		1007	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		1008	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1009
		1010	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1011
		1012	if (sv == &PL_sv_undef)
		1013	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1014	}
		1015	break;
		1016
		1017	case CBOR_TAG_PERL_OBJECT:
		1018	{
		1019	sv = decode_sv (dec);
		1020
		1021	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1022	ERR ("corrupted CBOR data (non-array perl object)");
		1023
		1024	AV *av = (AV *)SvRV (sv);
		1025	int len = av_len (av) + 1;
		1026	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1027
		1028	if (!stash)
		1029	ERR ("cannot decode perl-object (package does not exist)");
		1030
		1031	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1032
		1033	if (!method)
		1034	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1035
		1036	dSP;
		1037
		1038	ENTER; SAVETMPS;
		1039	PUSHMARK (SP);
		1040	EXTEND (SP, len + 1);
		1041	// we re-bless the reference to get overload and other niceties right
		1042	PUSHs (*av_fetch (av, 0, 1));
		1043	PUSHs (sv_cbor);
		1044
		1045	int i;
		1046
		1047	for (i = 1; i < len; ++i)
		1048	PUSHs (*av_fetch (av, i, 1));
		1049
		1050	PUTBACK;
		1051	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1052	SPAGAIN;
		1053
		1054	if (SvTRUE (ERRSV))
		1055	{
		1056	FREETMPS; LEAVE;
		1057	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1058	}
		1059
		1060	SvREFCNT_dec (sv);
		1061	sv = SvREFCNT_inc (POPs);
		1062
		1063	PUTBACK;
		1064
		1065	FREETMPS; LEAVE;
		1066	}
		1067	break;
		1068
		1069	default:
		1070	{
		1071	SV *tag_sv = newSVuv (tag);
		1072
		1073	sv = decode_sv (dec);
		1074
		1075	dSP;
		1076	ENTER; SAVETMPS;
		1077	SAVESTACK_POS ();
		1078	PUSHMARK (SP);
		1079	EXTEND (SP, 2);
		1080	PUSHs (tag_sv);
		1081	PUSHs (sv);
		1082
		1083	PUTBACK;
		1084	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1085	SPAGAIN;
		1086
		1087	if (SvTRUE (ERRSV))
		1088	{
		1089	SvREFCNT_dec (tag_sv);
		1090	FREETMPS; LEAVE;
		1091	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1092	}
		1093
		1094	if (count)
		1095	{
		1096	SvREFCNT_dec (tag_sv);
		1097	SvREFCNT_dec (sv);
		1098	sv = SvREFCNT_inc (POPs);
		1099	}
		1100	else
		1101	{
		1102	AV *av = newAV ();
		1103	av_push (av, tag_sv);
		1104	av_push (av, sv);
		1105
		1106	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1107	? cbor_tagged_stash
		1108	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1109	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1110	}
		1111
		1112	PUTBACK;
		1113
		1114	FREETMPS; LEAVE;
		1115	}
		1116	break;
		1117	}
		1118
642	return sv;	1119	return sv;
643		1120
644	AV *av = newAV ();	1121	fail:
645	av_push (av, newSVuv (tag));	1122	SvREFCNT_dec (sv);
646	av_push (av, sv);	1123	return &PL_sv_undef;
647
648	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
649	? cbor_tagged_stash
650	: gv_stashpv ("CBOR::XS::Tagged" , 1);
651
652	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);
653	}	1124	}
654		1125
655	static SV *	1126	static SV *
656	decode_sv (dec_t *dec)	1127	decode_sv (dec_t *dec)
657	{	1128	{
658	WANT (1);	1129	WANT (1);
659		1130
660	switch (*dec->cur >> 5)	1131	switch (*dec->cur >> MAJOR_SHIFT)
661	{	1132	{
662	case 0: // unsigned int	1133	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
663	return newSVuv (decode_uint (dec));	1134	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
664	case 1: // negative int	1135	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
665	return newSViv (-1 - (IV)decode_uint (dec));	1136	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
666	case 2: // octet string	1137	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
667	return decode_str (dec, 0);	1138	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
668	case 3: // utf-8 string	1139	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
669	return decode_str (dec, 1);	1140
670	case 4: // array	1141	case MAJOR_MISC >> MAJOR_SHIFT:
671	return decode_av (dec);
672	case 5: // map
673	return decode_hv (dec);
674	case 6: // tag
675	return decode_tagged (dec);
676	case 7: // misc
677	switch (*dec->cur++ & 31)	1142	switch (*dec->cur++ & MINOR_MASK)
678	{	1143	{
679	case 20:	1144	case SIMPLE_FALSE:
680	#if CBOR_SLOW	1145	#if CBOR_SLOW
681	cbor_false = get_bool ("CBOR::XS::false");	1146	types_false = get_bool ("Types::Serialiser::false");
682	#endif	1147	#endif
683	return newSVsv (cbor_false);	1148	return newSVsv (types_false);
684	case 21:	1149	case SIMPLE_TRUE:
685	#if CBOR_SLOW	1150	#if CBOR_SLOW
686	cbor_true = get_bool ("CBOR::XS::true");	1151	types_true = get_bool ("Types::Serialiser::true");
687	#endif	1152	#endif
688	return newSVsv (cbor_true);	1153	return newSVsv (types_true);
689	case 22:	1154	case SIMPLE_NULL:
690	return newSVsv (&PL_sv_undef);	1155	return newSVsv (&PL_sv_undef);
		1156	case SIMPLE_UNDEF:
		1157	#if CBOR_SLOW
		1158	types_error = get_bool ("Types::Serialiser::error");
		1159	#endif
		1160	return newSVsv (types_error);
691		1161
692	case 25:	1162	case MISC_FLOAT16:
693	{	1163	{
694	WANT (2);	1164	WANT (2);
695		1165
696	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1166	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
697	dec->cur += 2;	1167	dec->cur += 2;
698		1168
699	return newSVnv (ecb_binary16_to_float (fp));	1169	return newSVnv (ecb_binary16_to_float (fp));
700	}	1170	}
701		1171
702	case 26:	1172	case MISC_FLOAT32:
703	{	1173	{
704	uint32_t fp;	1174	uint32_t fp;
705	WANT (4);	1175	WANT (4);
706	memcpy (&fp, dec->cur, 4);	1176	memcpy (&fp, dec->cur, 4);
707	dec->cur += 4;	1177	dec->cur += 4;
…		…
710	fp = ecb_bswap32 (fp);	1180	fp = ecb_bswap32 (fp);
711		1181
712	return newSVnv (ecb_binary32_to_float (fp));	1182	return newSVnv (ecb_binary32_to_float (fp));
713	}	1183	}
714		1184
715	case 27:	1185	case MISC_FLOAT64:
716	{	1186	{
717	uint64_t fp;	1187	uint64_t fp;
718	WANT (8);	1188	WANT (8);
719	memcpy (&fp, dec->cur, 8);	1189	memcpy (&fp, dec->cur, 8);
720	dec->cur += 8;	1190	dec->cur += 8;
…		…
723	fp = ecb_bswap64 (fp);	1193	fp = ecb_bswap64 (fp);
724		1194
725	return newSVnv (ecb_binary64_to_double (fp));	1195	return newSVnv (ecb_binary64_to_double (fp));
726	}	1196	}
727		1197
728	// 0..19 unassigned	1198	// 0..19 unassigned simple
729	// 24 reserved + unassigned (reserved values are not encodable)	1199	// 24 reserved + unassigned simple (reserved values are not encodable)
		1200	// 28-30 unassigned misc
		1201	// 31 break code
730	default:	1202	default:
731	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1203	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
732	}	1204	}
733		1205
734	break;	1206	break;
735	}	1207	}
736		1208
…		…
739	}	1211	}
740		1212
741	static SV *	1213	static SV *
742	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1214	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
743	{	1215	{
744	dec_t dec;	1216	dec_t dec = { 0 };
745	SV *sv;	1217	SV *sv;
		1218	STRLEN len;
		1219	char *data = SvPVbyte (string, len);
746		1220
747	/* work around bugs in 5.10 where manipulating magic values
748	* makes perl ignore the magic in subsequent accesses.
749	* also make a copy of non-PV values, to get them into a clean
750	* state (SvPV should do that, but it's buggy, see below).
751	*/
752	/*SvGETMAGIC (string);*/
753	if (SvMAGICAL (string) || !SvPOK (string))
754	string = sv_2mortal (newSVsv (string));
755
756	SvUPGRADE (string, SVt_PV);
757
758	/* work around a bug in perl 5.10, which causes SvCUR to fail an
759	* assertion with -DDEBUGGING, although SvCUR is documented to
760	* return the xpv_cur field which certainly exists after upgrading.
761	* according to nicholas clark, calling SvPOK fixes this.
762	* But it doesn't fix it, so try another workaround, call SvPV_nolen
763	* and hope for the best.
764	* Damnit, SvPV_nolen still trips over yet another assertion. This
765	* assertion business is seriously broken, try yet another workaround
766	* for the broken -DDEBUGGING.
767	*/
768	{
769	#ifdef DEBUGGING
770	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
771	#else
772	STRLEN offset = SvCUR (string);
773	#endif
774
775	if (offset > cbor->max_size && cbor->max_size)	1221	if (len > cbor->max_size && cbor->max_size)
776	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1222	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
777	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1223	(unsigned long)len, (unsigned long)cbor->max_size);
778	}
779
780	sv_utf8_downgrade (string, 0);
781		1224
782	dec.cbor = *cbor;	1225	dec.cbor = *cbor;
783	dec.cur = (U8 *)SvPVX (string);	1226	dec.cur = (U8 *)data;
784	dec.end = (U8 *)SvEND (string);	1227	dec.end = (U8 *)data + len;
785	dec.err = 0;
786	dec.depth = 0;
787		1228
788	sv = decode_sv (&dec);	1229	sv = decode_sv (&dec);
789		1230
790	if (offset_return)	1231	if (offset_return)
791	*offset_return = dec.cur;	1232	*offset_return = dec.cur;
…		…
794	if (dec.cur != dec.end && !dec.err)	1235	if (dec.cur != dec.end && !dec.err)
795	dec.err = "garbage after CBOR object";	1236	dec.err = "garbage after CBOR object";
796		1237
797	if (dec.err)	1238	if (dec.err)
798	{	1239	{
		1240	if (dec.shareable)
		1241	{
		1242	// need to break cyclic links, which would all be in shareable
		1243	int i;
		1244	SV **svp;
		1245
		1246	for (i = av_len (dec.shareable) + 1; i--; )
		1247	if ((svp = av_fetch (dec.shareable, i, 0)))
		1248	sv_setsv (*svp, &PL_sv_undef);
		1249	}
		1250
799	SvREFCNT_dec (sv);	1251	SvREFCNT_dec (sv);
800	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1252	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
801	}	1253	}
802		1254
803	sv = sv_2mortal (sv);	1255	sv = sv_2mortal (sv);
804		1256
805	return sv;	1257	return sv;
806	}	1258	}
807		1259
		1260	/////////////////////////////////////////////////////////////////////////////
		1261	// incremental parser
		1262
		1263	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1264
		1265	// returns 0 for notyet, 1 for success or error
		1266	static int
		1267	incr_parse (CBOR *self, SV *cborstr)
		1268	{
		1269	STRLEN cur;
		1270	SvPV (cborstr, cur);
		1271
		1272	while (ecb_expect_true (self->incr_need <= cur))
		1273	{
		1274	// table of integer count bytes
		1275	static I8 incr_len[MINOR_MASK + 1] = {
		1276	0, 0, 0, 0, 0, 0, 0, 0,
		1277	0, 0, 0, 0, 0, 0, 0, 0,
		1278	0, 0, 0, 0, 0, 0, 0, 0,
		1279	1, 2, 4, 8,-1,-1,-1,-2
		1280	};
		1281
		1282	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1283	U8 m = *p & MINOR_MASK;
		1284	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1285	I8 ilen = incr_len[m];
		1286
		1287	self->incr_need = self->incr_pos + 1;
		1288
		1289	if (ecb_expect_false (ilen < 0))
		1290	{
		1291	if (m != MINOR_INDEF)
		1292	return 1; // error
		1293
		1294	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1295	{
		1296	if (count >= 0)
		1297	return 1; // error
		1298
		1299	count = 1;
		1300	}
		1301	else
		1302	{
		1303	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1304	count = -1;
		1305	}
		1306	}
		1307	else
		1308	{
		1309	self->incr_need += ilen;
		1310	if (ecb_expect_false (self->incr_need > cur))
		1311	return 0;
		1312
		1313	int major = *p >> MAJOR_SHIFT;
		1314
		1315	switch (major)
		1316	{
		1317	case MAJOR_TAG >> MAJOR_SHIFT:
		1318	++count; // tags merely prefix another value
		1319	break;
		1320
		1321	case MAJOR_BYTES >> MAJOR_SHIFT:
		1322	case MAJOR_TEXT >> MAJOR_SHIFT:
		1323	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1324	case MAJOR_MAP >> MAJOR_SHIFT:
		1325	{
		1326	UV len;
		1327
		1328	if (ecb_expect_false (ilen))
		1329	{
		1330	len = 0;
		1331
		1332	do {
		1333	len = (len << 8) | *++p;
		1334	} while (--ilen);
		1335	}
		1336	else
		1337	len = m;
		1338
		1339	switch (major)
		1340	{
		1341	case MAJOR_BYTES >> MAJOR_SHIFT:
		1342	case MAJOR_TEXT >> MAJOR_SHIFT:
		1343	self->incr_need += len;
		1344	if (ecb_expect_false (self->incr_need > cur))
		1345	return 0;
		1346
		1347	break;
		1348
		1349	case MAJOR_MAP >> MAJOR_SHIFT:
		1350	len <<= 1;
		1351	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1352	if (len)
		1353	{
		1354	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1355	count = len + 1;
		1356	}
		1357	break;
		1358	}
		1359	}
		1360	}
		1361	}
		1362
		1363	self->incr_pos = self->incr_need;
		1364
		1365	if (count > 0)
		1366	{
		1367	while (!--count)
		1368	{
		1369	if (!AvFILLp (self->incr_count))
		1370	return 1; // done
		1371
		1372	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1373	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1374	}
		1375
		1376	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1377	}
		1378	}
		1379
		1380	return 0;
		1381	}
		1382
		1383
808	/////////////////////////////////////////////////////////////////////////////	1384	/////////////////////////////////////////////////////////////////////////////
809	// XS interface functions	1385	// XS interface functions
810		1386
811	MODULE = CBOR::XS PACKAGE = CBOR::XS	1387	MODULE = CBOR::XS PACKAGE = CBOR::XS
812		1388
813	BOOT:	1389	BOOT:
814	{	1390	{
815	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1391	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
816	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);
817	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);	1392	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
818		1393
819	cbor_true = get_bool ("CBOR::XS::true");	1394	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
820	cbor_false = get_bool ("CBOR::XS::false");	1395	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1396
		1397	types_true = get_bool ("Types::Serialiser::true" );
		1398	types_false = get_bool ("Types::Serialiser::false");
		1399	types_error = get_bool ("Types::Serialiser::error");
		1400
		1401	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1402
		1403	sv_cbor = newSVpv ("CBOR", 0);
		1404	SvREADONLY_on (sv_cbor);
		1405
		1406	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
821	}	1407	}
822		1408
823	PROTOTYPES: DISABLE	1409	PROTOTYPES: DISABLE
824		1410
825	void CLONE (...)	1411	void CLONE (...)
826	CODE:	1412	CODE:
827	cbor_stash = 0;	1413	cbor_stash = 0;
828	cbor_boolean_stash = 0;
829	cbor_tagged_stash = 0;	1414	cbor_tagged_stash = 0;
		1415	types_error_stash = 0;
		1416	types_boolean_stash = 0;
830		1417
831	void new (char *klass)	1418	void new (char *klass)
832	PPCODE:	1419	PPCODE:
833	{	1420	{
834	SV *pv = NEWSV (0, sizeof (CBOR));	1421	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
842		1429
843	void shrink (CBOR *self, int enable = 1)	1430	void shrink (CBOR *self, int enable = 1)
844	ALIAS:	1431	ALIAS:
845	shrink = F_SHRINK	1432	shrink = F_SHRINK
846	allow_unknown = F_ALLOW_UNKNOWN	1433	allow_unknown = F_ALLOW_UNKNOWN
		1434	allow_sharing = F_ALLOW_SHARING
		1435	allow_cycles = F_ALLOW_CYCLES
		1436	pack_strings = F_PACK_STRINGS
		1437	text_keys = F_TEXT_KEYS
		1438	text_strings = F_TEXT_STRINGS
		1439	validate_utf8 = F_VALIDATE_UTF8
847	PPCODE:	1440	PPCODE:
848	{	1441	{
849	if (enable)	1442	if (enable)
850	self->flags |= ix;	1443	self->flags |= ix;
851	else	1444	else
…		…
856		1449
857	void get_shrink (CBOR *self)	1450	void get_shrink (CBOR *self)
858	ALIAS:	1451	ALIAS:
859	get_shrink = F_SHRINK	1452	get_shrink = F_SHRINK
860	get_allow_unknown = F_ALLOW_UNKNOWN	1453	get_allow_unknown = F_ALLOW_UNKNOWN
		1454	get_allow_sharing = F_ALLOW_SHARING
		1455	get_allow_cycles = F_ALLOW_CYCLES
		1456	get_pack_strings = F_PACK_STRINGS
		1457	get_text_keys = F_TEXT_KEYS
		1458	get_text_strings = F_TEXT_STRINGS
		1459	get_validate_utf8 = F_VALIDATE_UTF8
861	PPCODE:	1460	PPCODE:
862	XPUSHs (boolSV (self->flags & ix));	1461	XPUSHs (boolSV (self->flags & ix));
863		1462
864	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1463	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
865	PPCODE:	1464	PPCODE:
…		…
881	CODE:	1480	CODE:
882	RETVAL = self->max_size;	1481	RETVAL = self->max_size;
883	OUTPUT:	1482	OUTPUT:
884	RETVAL	1483	RETVAL
885		1484
886	#if 0 //TODO	1485	void filter (CBOR *self, SV *filter = 0)
887
888	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
889	PPCODE:	1486	PPCODE:
890	{
891	SvREFCNT_dec (self->cb_object);	1487	SvREFCNT_dec (self->filter);
892	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1488	self->filter = filter ? newSVsv (filter) : filter;
893
894	XPUSHs (ST (0));	1489	XPUSHs (ST (0));
895	}
896		1490
897	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1491	SV *get_filter (CBOR *self)
898	PPCODE:	1492	CODE:
899	{	1493	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
900	if (!self->cb_sk_object)	1494	OUTPUT:
901	self->cb_sk_object = newHV ();	1495	RETVAL
902
903	if (SvOK (cb))
904	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
905	else
906	{
907	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
908
909	if (!HvKEYS (self->cb_sk_object))
910	{
911	SvREFCNT_dec (self->cb_sk_object);
912	self->cb_sk_object = 0;
913	}
914	}
915
916	XPUSHs (ST (0));
917	}
918
919	#endif
920		1496
921	void encode (CBOR *self, SV *scalar)	1497	void encode (CBOR *self, SV *scalar)
922	PPCODE:	1498	PPCODE:
923	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1499	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
924	XPUSHs (scalar);	1500	XPUSHs (scalar);
…		…
937	EXTEND (SP, 2);	1513	EXTEND (SP, 2);
938	PUSHs (sv);	1514	PUSHs (sv);
939	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1515	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
940	}	1516	}
941		1517
942	#if 0	1518	void incr_parse (CBOR *self, SV *cborstr)
		1519	ALIAS:
		1520	incr_parse_multiple = 1
		1521	PPCODE:
		1522	{
		1523	if (SvUTF8 (cborstr))
		1524	sv_utf8_downgrade (cborstr, 0);
		1525
		1526	if (!self->incr_count)
		1527	{
		1528	self->incr_count = newAV ();
		1529	self->incr_pos = 0;
		1530	self->incr_need = 1;
		1531
		1532	av_push (self->incr_count, newSViv (1));
		1533	}
		1534
		1535	do
		1536	{
		1537	if (!incr_parse (self, cborstr))
		1538	{
		1539	if (self->incr_need > self->max_size && self->max_size)
		1540	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1541	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1542
		1543	break;
		1544	}
		1545
		1546	SV *sv;
		1547	char *offset;
		1548
		1549	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1550	XPUSHs (sv);
		1551
		1552	sv_chop (cborstr, offset);
		1553
		1554	av_clear (self->incr_count);
		1555	av_push (self->incr_count, newSViv (1));
		1556
		1557	self->incr_pos = 0;
		1558	self->incr_need = self->incr_pos + 1;
		1559	}
		1560	while (ix);
		1561	}
		1562
		1563	void incr_reset (CBOR *self)
		1564	CODE:
		1565	{
		1566	SvREFCNT_dec (self->incr_count);
		1567	self->incr_count = 0;
		1568	}
943		1569
944	void DESTROY (CBOR *self)	1570	void DESTROY (CBOR *self)
945	CODE:	1571	PPCODE:
946	SvREFCNT_dec (self->cb_sk_object);	1572	cbor_free (self);
947	SvREFCNT_dec (self->cb_object);
948
949	#endif
950		1573
951	PROTOTYPES: ENABLE	1574	PROTOTYPES: ENABLE
952		1575
953	void encode_cbor (SV *scalar)	1576	void encode_cbor (SV *scalar)
		1577	ALIAS:
		1578	encode_cbor = 0
		1579	encode_cbor_sharing = F_ALLOW_SHARING
954	PPCODE:	1580	PPCODE:
955	{	1581	{
956	CBOR cbor;	1582	CBOR cbor;
957	cbor_init (&cbor);	1583	cbor_init (&cbor);
		1584	cbor.flags |= ix;
958	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1585	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
959	XPUSHs (scalar);	1586	XPUSHs (scalar);
960	}	1587	}
961		1588
962	void decode_cbor (SV *cborstr)	1589	void decode_cbor (SV *cborstr)

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