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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.7 by root, Sat Oct 26 23:02:55 2013 UTC vs.
Revision 1.66 by root, Sun Nov 29 21:32:01 2020 UTC

…		…
6	#include <string.h>	6	#include <string.h>
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	#include <inttypes.h>
11		12
		13	#define ECB_NO_THREADS 1
12	#include "ecb.h"	14	#include "ecb.h"
13		15
		16	// compatibility with perl <5.18
		17	#ifndef HvNAMELEN_get
		18	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		19	#endif
		20	#ifndef HvNAMELEN
		21	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		22	#endif
		23	#ifndef HvNAMEUTF8
		24	# define HvNAMEUTF8(hv) 0
		25	#endif
		26	#ifndef SvREFCNT_inc_NN
		27	# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
		28	#endif
		29	#ifndef SvREFCNT_dec_NN
		30	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		31	#endif
		32
		33	// known major and minor types
		34	enum cbor_type
		35	{
		36	MAJOR_SHIFT = 5,
		37	MINOR_MASK = 0x1f,
		38
		39	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		40	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		41	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		42	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		43	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		44	MAJOR_MAP = 5 << MAJOR_SHIFT,
		45	MAJOR_TAG = 6 << MAJOR_SHIFT,
		46	MAJOR_MISC = 7 << MAJOR_SHIFT,
		47
		48	// INT/STRING/ARRAY/MAP subtypes
		49	LENGTH_EXT1 = 24,
		50	LENGTH_EXT2 = 25,
		51	LENGTH_EXT4 = 26,
		52	LENGTH_EXT8 = 27,
		53
		54	// SIMPLE types (effectively MISC subtypes)
		55	SIMPLE_FALSE = 20,
		56	SIMPLE_TRUE = 21,
		57	SIMPLE_NULL = 22,
		58	SIMPLE_UNDEF = 23,
		59
		60	// MISC subtype (unused)
		61	MISC_EXT1 = 24,
		62	MISC_FLOAT16 = 25,
		63	MISC_FLOAT32 = 26,
		64	MISC_FLOAT64 = 27,
		65
		66	// BYTES/TEXT/ARRAY/MAP
		67	MINOR_INDEF = 31,
		68	};
		69
		70	// known tags
		71	enum cbor_tag
		72	{
		73	// extensions
		74	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
		75	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
		76	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
		77	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
		78	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
		79	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
		80	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
		81
		82	// rfc7049
		83	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
		84	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
		85	CBOR_TAG_POS_BIGNUM = 2, // byte string
		86	CBOR_TAG_NEG_BIGNUM = 3, // byte string
		87	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
		88	CBOR_TAG_BIGFLOAT = 5, // array
		89
		90	CBOR_TAG_CONV_B64U = 21, // base64url, any
		91	CBOR_TAG_CONV_B64 = 22, // base64, any
		92	CBOR_TAG_CONV_HEX = 23, // base16, any
		93	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
		94
		95	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
		96	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
		97	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
		98	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
		99	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
		100
		101	CBOR_TAG_MAGIC = 55799, // self-describe cbor
		102	};
		103
		104	// known forced types, also hardcoded in CBOR.pm
		105	enum
		106	{
		107	AS_CBOR = 0,
		108	AS_BYTES = 1,
		109	AS_TEXT = 2,
		110	AS_FLOAT16 = 3,
		111	AS_FLOAT32 = 4,
		112	AS_FLOAT64 = 5,
		113	// possibly future enhancements: float, integer
		114	};
		115
14	#define F_SHRINK 0x00000200UL	116	#define F_SHRINK 0x00000001UL
15	#define F_ALLOW_UNKNOWN 0x00002000UL	117	#define F_ALLOW_UNKNOWN 0x00000002UL
		118	#define F_ALLOW_SHARING 0x00000004UL
		119	#define F_ALLOW_CYCLES 0x00000008UL
		120	#define F_FORBID_OBJECTS 0x00000010UL
		121	#define F_PACK_STRINGS 0x00000020UL
		122	#define F_TEXT_KEYS 0x00000040UL
		123	#define F_TEXT_STRINGS 0x00000080UL
		124	#define F_VALIDATE_UTF8 0x00000100UL
16		125
17	#define INIT_SIZE 32 // initial scalar size to be allocated	126	#define INIT_SIZE 32 // initial scalar size to be allocated
18		127
19	#define SB do {	128	#define SB do {
20	#define SE } while (0)	129	#define SE } while (0)
…		…
31	#else	140	#else
32	# define CBOR_SLOW 0	141	# define CBOR_SLOW 0
33	# define CBOR_STASH cbor_stash	142	# define CBOR_STASH cbor_stash
34	#endif	143	#endif
35		144
36	static HV *cbor_stash, *cbor_boolean_stash, *cbor_tagged_stash; // CBOR::XS::	145	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
37	static SV *cbor_true, *cbor_false;	146	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
38		147
39	typedef struct {	148	typedef struct {
40	U32 flags;	149	U32 flags;
41	U32 max_depth;	150	U32 max_depth;
42	STRLEN max_size;	151	STRLEN max_size;
		152	SV *filter;
		153
		154	// for the incremental parser
		155	STRLEN incr_pos; // the current offset into the text
		156	STRLEN incr_need; // minimum bytes needed to decode
		157	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
43	} CBOR;	158	} CBOR;
44		159
45	ecb_inline void	160	ecb_inline void
46	cbor_init (CBOR *cbor)	161	cbor_init (CBOR *cbor)
47	{	162	{
48	Zero (cbor, 1, CBOR);	163	Zero (cbor, 1, CBOR);
49	cbor->max_depth = 512;	164	cbor->max_depth = 512;
		165	}
		166
		167	ecb_inline void
		168	cbor_free (CBOR *cbor)
		169	{
		170	SvREFCNT_dec (cbor->filter);
		171	SvREFCNT_dec (cbor->incr_count);
50	}	172	}
51		173
52	/////////////////////////////////////////////////////////////////////////////	174	/////////////////////////////////////////////////////////////////////////////
53	// utility functions	175	// utility functions
54		176
…		…
76	SvPV_renew (sv, SvCUR (sv) + 1);	198	SvPV_renew (sv, SvCUR (sv) + 1);
77	#endif	199	#endif
78	}	200	}
79	}	201	}
80		202
81	/////////////////////////////////////////////////////////////////////////////	203	// minimum length of a string to be registered for stringref
82	// fp hell	204	ecb_inline int
83		205	minimum_string_length (UV idx)
84	//TODO	206	{
		207	return idx <= 23 ? 3
		208	: idx <= 0xffU ? 4
		209	: idx <= 0xffffU ? 5
		210	: idx <= 0xffffffffU ? 7
		211	: 11;
		212	}
85		213
86	/////////////////////////////////////////////////////////////////////////////	214	/////////////////////////////////////////////////////////////////////////////
87	// encoder	215	// encoder
88		216
89	// structure used for encoding CBOR	217	// structure used for encoding CBOR
…		…
92	char *cur; // SvPVX (sv) + current output position	220	char *cur; // SvPVX (sv) + current output position
93	char *end; // SvEND (sv)	221	char *end; // SvEND (sv)
94	SV *sv; // result scalar	222	SV *sv; // result scalar
95	CBOR cbor;	223	CBOR cbor;
96	U32 depth; // recursion level	224	U32 depth; // recursion level
		225	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		226	UV stringref_idx;
		227	HV *shareable; // ptr => index, or 0
		228	UV shareable_idx;
97	} enc_t;	229	} enc_t;
98		230
99	ecb_inline void	231	ecb_inline void
100	need (enc_t *enc, STRLEN len)	232	need (enc_t *enc, STRLEN len)
101	{	233	{
102	if (ecb_expect_false (enc->cur + len >= enc->end))	234	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
103	{	235	{
104	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	236	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
105	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	237	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
106	enc->cur = SvPVX (enc->sv) + cur;	238	enc->cur = SvPVX (enc->sv) + cur;
107	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	239	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
…		…
113	{	245	{
114	need (enc, 1);	246	need (enc, 1);
115	*enc->cur++ = ch;	247	*enc->cur++ = ch;
116	}	248	}
117		249
		250	// used for tags, intregers, element counts and so on
118	static void	251	static void
119	encode_uint (enc_t *enc, int major, UV len)	252	encode_uint (enc_t *enc, int major, UV len)
120	{	253	{
121	need (enc, 9);	254	need (enc, 9);
122		255
123	if (len < 24)	256	if (ecb_expect_true (len < LENGTH_EXT1))
124	*enc->cur++ = major | len;	257	*enc->cur++ = major | len;
125	else if (len <= 0xff)	258	else if (ecb_expect_true (len <= 0xffU))
126	{	259	{
127	*enc->cur++ = major | 24;	260	*enc->cur++ = major | LENGTH_EXT1;
128	*enc->cur++ = len;	261	*enc->cur++ = len;
129	}	262	}
130	else if (len <= 0xffff)	263	else if (len <= 0xffffU)
131	{	264	{
132	*enc->cur++ = major | 25;	265	*enc->cur++ = major | LENGTH_EXT2;
133	*enc->cur++ = len >> 8;	266	*enc->cur++ = len >> 8;
134	*enc->cur++ = len;	267	*enc->cur++ = len;
135	}	268	}
136	else if (len <= 0xffffffff)	269	else if (len <= 0xffffffffU)
137	{	270	{
138	*enc->cur++ = major | 26;	271	*enc->cur++ = major | LENGTH_EXT4;
139	*enc->cur++ = len >> 24;	272	*enc->cur++ = len >> 24;
140	*enc->cur++ = len >> 16;	273	*enc->cur++ = len >> 16;
141	*enc->cur++ = len >> 8;	274	*enc->cur++ = len >> 8;
142	*enc->cur++ = len;	275	*enc->cur++ = len;
143	}	276	}
144	else	277	else
145	{	278	{
146	*enc->cur++ = major | 27;	279	*enc->cur++ = major | LENGTH_EXT8;
147	*enc->cur++ = len >> 56;	280	*enc->cur++ = len >> 56;
148	*enc->cur++ = len >> 48;	281	*enc->cur++ = len >> 48;
149	*enc->cur++ = len >> 40;	282	*enc->cur++ = len >> 40;
150	*enc->cur++ = len >> 32;	283	*enc->cur++ = len >> 32;
151	*enc->cur++ = len >> 24;	284	*enc->cur++ = len >> 24;
…		…
153	*enc->cur++ = len >> 8;	286	*enc->cur++ = len >> 8;
154	*enc->cur++ = len;	287	*enc->cur++ = len;
155	}	288	}
156	}	289	}
157		290
158	static void	291	// encodes a perl value into a CBOR integer
		292	ecb_inline
		293	encode_int (enc_t *enc, SV *sv)
		294	{
		295	if (SvIsUV (sv))
		296	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
		297	else if (SvIVX (sv) >= 0)
		298	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
		299	else
		300	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
		301	}
		302
		303	ecb_inline void
		304	encode_tag (enc_t *enc, UV tag)
		305	{
		306	encode_uint (enc, MAJOR_TAG, tag);
		307	}
		308
		309	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		310	ecb_noinline static void
159	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	311	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
160	{	312	{
161	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	313	STRLEN ulen = len;
		314	U8 *p, *pend = (U8 *)str + len;
		315
		316	for (p = (U8 *)str; p < pend; ++p)
		317	ulen += *p >> 7; // count set high bits
		318
		319	encode_uint (enc, MAJOR_TEXT, ulen);
		320
		321	need (enc, ulen);
		322	for (p = (U8 *)str; p < pend; ++p)
		323	if (*p < 0x80)
		324	*enc->cur++ = *p;
		325	else
		326	{
		327	*enc->cur++ = 0xc0 + (*p >> 6);
		328	*enc->cur++ = 0x80 + (*p & 63);
		329	}
		330	}
		331
		332	ecb_inline void
		333	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		334	{
		335	if (ecb_expect_false (upgrade_utf8))
		336	if (!utf8)
		337	{
		338	encode_str_utf8 (enc, utf8, str, len);
		339	return;
		340	}
		341
		342	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
162	need (enc, len);	343	need (enc, len);
163	memcpy (enc->cur, str, len);	344	memcpy (enc->cur, str, len);
164	enc->cur += len;	345	enc->cur += len;
165	}	346	}
166		347
		348	ecb_inline void
		349	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		350	{
		351	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		352	{
		353	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		354
		355	if (SvOK (*svp))
		356	{
		357	// already registered, use stringref
		358	encode_tag (enc, CBOR_TAG_STRINGREF);
		359	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		360	return;
		361	}
		362	else if (len >= minimum_string_length (enc->stringref_idx))
		363	{
		364	// register only
		365	sv_setuv (*svp, enc->stringref_idx);
		366	++enc->stringref_idx;
		367	}
		368	}
		369
		370	encode_str (enc, upgrade_utf8, utf8, str, len);
		371	}
		372
		373	ecb_inline void
		374	encode_float16 (enc_t *enc, NV nv)
		375	{
		376	need (enc, 1+2);
		377
		378	*enc->cur++ = MAJOR_MISC | MISC_FLOAT16;
		379
		380	uint16_t fp = ecb_float_to_binary16 (nv);
		381
		382	if (!ecb_big_endian ())
		383	fp = ecb_bswap16 (fp);
		384
		385	memcpy (enc->cur, &fp, 2);
		386	enc->cur += 2;
		387	}
		388
		389	ecb_inline void
		390	encode_float32 (enc_t *enc, NV nv)
		391	{
		392	need (enc, 1+4);
		393
		394	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
		395
		396	uint32_t fp = ecb_float_to_binary32 (nv);
		397
		398	if (!ecb_big_endian ())
		399	fp = ecb_bswap32 (fp);
		400
		401	memcpy (enc->cur, &fp, 4);
		402	enc->cur += 4;
		403	}
		404
		405	ecb_inline void
		406	encode_float64 (enc_t *enc, NV nv)
		407	{
		408	need (enc, 1+8);
		409
		410	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
		411
		412	uint64_t fp = ecb_double_to_binary64 (nv);
		413
		414	if (!ecb_big_endian ())
		415	fp = ecb_bswap64 (fp);
		416
		417	memcpy (enc->cur, &fp, 8);
		418	enc->cur += 8;
		419	}
		420
		421	ecb_inline void
		422	encode_forced (enc_t *enc, UV type, SV *sv)
		423	{
		424	switch (type)
		425	{
		426	case AS_CBOR:
		427	{
		428	STRLEN len;
		429	char *str = SvPVbyte (sv, len);
		430
		431	need (enc, len);
		432	memcpy (enc->cur, str, len);
		433	enc->cur += len;
		434	}
		435	break;
		436
		437	case AS_BYTES:
		438	{
		439	STRLEN len;
		440	char *str = SvPVbyte (sv, len);
		441	encode_strref (enc, 0, 0, str, len);
		442	}
		443	break;
		444
		445	case AS_TEXT:
		446	{
		447	STRLEN len;
		448	char *str = SvPVutf8 (sv, len);
		449	encode_strref (enc, 1, 1, str, len);
		450	}
		451	break;
		452
		453	case AS_FLOAT16: encode_float16 (enc, SvNV (sv)); break;
		454	case AS_FLOAT32: encode_float32 (enc, SvNV (sv)); break;
		455	case AS_FLOAT64: encode_float64 (enc, SvNV (sv)); break;
		456
		457	default:
		458	croak ("encountered malformed CBOR::XS::Tagged object");
		459	}
		460	}
		461
167	static void encode_sv (enc_t *enc, SV *sv);	462	static void encode_sv (enc_t *enc, SV *sv);
168		463
169	static void	464	static void
170	encode_av (enc_t *enc, AV *av)	465	encode_av (enc_t *enc, AV *av)
171	{	466	{
…		…
174	if (enc->depth >= enc->cbor.max_depth)	469	if (enc->depth >= enc->cbor.max_depth)
175	croak (ERR_NESTING_EXCEEDED);	470	croak (ERR_NESTING_EXCEEDED);
176		471
177	++enc->depth;	472	++enc->depth;
178		473
179	encode_uint (enc, 0x80, len + 1);	474	encode_uint (enc, MAJOR_ARRAY, len + 1);
180		475
		476	if (ecb_expect_false (SvMAGICAL (av)))
181	for (i = 0; i <= len; ++i)	477	for (i = 0; i <= len; ++i)
182	{	478	{
183	SV **svp = av_fetch (av, i, 0);	479	SV **svp = av_fetch (av, i, 0);
184	encode_sv (enc, svp ? *svp : &PL_sv_undef);	480	encode_sv (enc, svp ? *svp : &PL_sv_undef);
185	}	481	}
		482	else
		483	for (i = 0; i <= len; ++i)
		484	{
		485	SV *sv = AvARRAY (av)[i];
		486	encode_sv (enc, sv ? sv : &PL_sv_undef);
		487	}
186		488
187	--enc->depth;	489	--enc->depth;
188	}	490	}
189		491
190	static void	492	static void
…		…
198	++enc->depth;	500	++enc->depth;
199		501
200	int pairs = hv_iterinit (hv);	502	int pairs = hv_iterinit (hv);
201	int mg = SvMAGICAL (hv);	503	int mg = SvMAGICAL (hv);
202		504
203	if (mg)	505	if (ecb_expect_false (mg))
204	encode_ch (enc, 0xa0 | 31);	506	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
205	else	507	else
206	encode_uint (enc, 0xa0, pairs);	508	encode_uint (enc, MAJOR_MAP, pairs);
207		509
208	while ((he = hv_iternext (hv)))	510	while ((he = hv_iternext (hv)))
209	{	511	{
210	if (HeKLEN (he) == HEf_SVKEY)	512	if (HeKLEN (he) == HEf_SVKEY)
211	encode_sv (enc, HeSVKEY (he));	513	encode_sv (enc, HeSVKEY (he));
212	else	514	else
213	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	515	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
214		516
215	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	517	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
216	}	518	}
217		519
218	if (mg)	520	if (ecb_expect_false (mg))
219	encode_ch (enc, 0xe0 | 31);	521	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
220		522
221	--enc->depth;	523	--enc->depth;
222	}	524	}
223		525
224	// encode objects, arrays and special \0=false and \1=true values.	526	// encode objects, arrays and special \0=false and \1=true values.
225	static void	527	static void
226	encode_rv (enc_t *enc, SV *sv)	528	encode_rv (enc_t *enc, SV *sv)
227	{	529	{
228	svtype svt;
229
230	SvGETMAGIC (sv);	530	SvGETMAGIC (sv);
		531
231	svt = SvTYPE (sv);	532	svtype svt = SvTYPE (sv);
232		533
233	if (ecb_expect_false (SvOBJECT (sv)))	534	if (ecb_expect_false (SvOBJECT (sv)))
234	{	535	{
235	HV *boolean_stash = !CBOR_SLOW || cbor_boolean_stash	536	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
236	? cbor_boolean_stash	537	? types_boolean_stash
237	: gv_stashpv ("CBOR::XS::Boolean", 1);	538	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		539	HV *error_stash = !CBOR_SLOW || types_error_stash
		540	? types_error_stash
		541	: gv_stashpv ("Types::Serialiser::Error", 1);
238	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	542	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
239	? cbor_tagged_stash	543	? cbor_tagged_stash
240	: gv_stashpv ("CBOR::XS::Tagged" , 1);	544	: gv_stashpv ("CBOR::XS::Tagged" , 1);
241		545
		546	HV *stash = SvSTASH (sv);
		547
242	if (SvSTASH (sv) == boolean_stash)	548	if (stash == boolean_stash)
243	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	549	{
		550	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		551	return;
		552	}
		553	else if (stash == error_stash)
		554	{
		555	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		556	return;
		557	}
244	else if (SvSTASH (sv) == tagged_stash)	558	else if (stash == tagged_stash)
245	{	559	{
246	if (svt != SVt_PVAV)	560	if (svt != SVt_PVAV)
247	croak ("encountered CBOR::XS::Tagged object that isn't an array");	561	croak ("encountered CBOR::XS::Tagged object that isn't an array");
248		562
		563	switch (av_len ((AV *)sv))
		564	{
		565	case 2-1:
		566	// actually a tagged value
249	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	567	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
250	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));	568	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		569	break;
		570
		571	case 3-1:
		572	// a forced type [value, type, undef]
		573	encode_forced (enc, SvUV (*av_fetch ((AV *)sv, 1, 1)), *av_fetch ((AV *)sv, 0, 1));
		574	break;
		575
		576	default:
		577	croak ("encountered malformed CBOR::XS::Tagged object");
		578	}
		579
		580	return;
		581	}
		582	}
		583
		584	if (ecb_expect_false (SvREFCNT (sv) > 1)
		585	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		586	{
		587	if (ecb_expect_false (!enc->shareable))
		588	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		589
		590	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		591
		592	if (SvOK (*svp))
		593	{
		594	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		595	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		596	return;
251	}	597	}
252	else	598	else
253	{	599	{
		600	sv_setuv (*svp, enc->shareable_idx);
		601	++enc->shareable_idx;
		602	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		603	}
		604	}
		605
		606	if (ecb_expect_false (SvOBJECT (sv)))
		607	{
		608	HV *stash = SvSTASH (sv);
		609	GV *method;
		610
		611	if (enc->cbor.flags & F_FORBID_OBJECTS)
		612	croak ("encountered object '%s', but forbid_objects is enabled",
		613	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		614	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
		615	{
		616	dSP;
		617
		618	ENTER; SAVETMPS;
		619	PUSHMARK (SP);
254	// we re-bless the reference to get overload and other niceties right	620	// we re-bless the reference to get overload and other niceties right
255	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
256
257	if (to_cbor)
258	{
259	dSP;
260
261	ENTER; SAVETMPS; PUSHMARK (SP);
262	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	621	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
263		622
264	// calling with G_SCALAR ensures that we always get a 1 return value
265	PUTBACK;	623	PUTBACK;
		624	// G_SCALAR ensures that return value is 1
266	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	625	call_sv ((SV *)GvCV (method), G_SCALAR);
267	SPAGAIN;	626	SPAGAIN;
268		627
269	// catch this surprisingly common error	628	// catch this surprisingly common error
270	if (SvROK (TOPs) && SvRV (TOPs) == sv)	629	if (SvROK (TOPs) && SvRV (TOPs) == sv)
271	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	630	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
272		631
273	sv = POPs;	632	encode_sv (enc, POPs);
		633
274	PUTBACK;	634	PUTBACK;
275		635
276	encode_sv (enc, sv);
277
278	FREETMPS; LEAVE;	636	FREETMPS; LEAVE;
		637	}
		638	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
		639	{
		640	dSP;
		641
		642	ENTER; SAVETMPS;
		643	PUSHMARK (SP);
		644	EXTEND (SP, 2);
		645	// we re-bless the reference to get overload and other niceties right
		646	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		647	PUSHs (sv_cbor);
		648
		649	PUTBACK;
		650	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		651	SPAGAIN;
		652
		653	// catch this surprisingly common error
		654	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		655	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		656
		657	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		658	encode_uint (enc, MAJOR_ARRAY, count + 1);
		659	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		660
		661	{
		662	int i;
		663
		664	for (i = 0; i < count; ++i)
		665	encode_sv (enc, SP[i + 1 - count]);
		666
		667	SP -= count;
279	}	668	}
		669
		670	PUTBACK;
		671
		672	FREETMPS; LEAVE;
		673	}
280	else	674	else
281	croak ("encountered object '%s', but no TO_CBOR method available on it",	675	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
282	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	676	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
283	}
284	}	677	}
285	else if (svt == SVt_PVHV)	678	else if (svt == SVt_PVHV)
286	encode_hv (enc, (HV *)sv);	679	encode_hv (enc, (HV *)sv);
287	else if (svt == SVt_PVAV)	680	else if (svt == SVt_PVAV)
288	encode_av (enc, (AV *)sv);	681	encode_av (enc, (AV *)sv);
289	else if (svt < SVt_PVAV)
290	{
291	STRLEN len = 0;
292	char *pv = svt ? SvPV (sv, len) : 0;
293
294	if (len == 1 && *pv == '1')
295	encode_ch (enc, 0xe0 | 21);
296	else if (len == 1 && *pv == '0')
297	encode_ch (enc, 0xe0 | 20);
298	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
299	encode_ch (enc, 0xe0 | 23);
300	else
301	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
302	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
303	}
304	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
305	encode_ch (enc, 0xe0 | 23);
306	else	682	else
307	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	683	{
308	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	684	encode_tag (enc, CBOR_TAG_INDIRECTION);
		685	encode_sv (enc, sv);
		686	}
309	}	687	}
310		688
311	static void	689	static void
312	encode_nv (enc_t *enc, SV *sv)	690	encode_nv (enc_t *enc, SV *sv)
313	{	691	{
314	double nv = SvNVX (sv);	692	double nv = SvNVX (sv);
315		693
316	need (enc, 9);	694	need (enc, 9);
317		695
318	if (ecb_expect_false (nv == (U32)nv))	696	if (ecb_expect_false (nv == (NV)(U32)nv))
319	encode_uint (enc, 0x00, (U32)nv);	697	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
320	//TODO: maybe I32?	698	//TODO: maybe I32?
321	else if (ecb_expect_false (nv == (float)nv))	699	else if (ecb_expect_false (nv == (float)nv))
322	{	700	encode_float32 (enc, nv);
323	uint32_t fp = ecb_float_to_binary32 (nv);
324
325	*enc->cur++ = 0xe0 | 26;
326
327	if (!ecb_big_endian ())
328	fp = ecb_bswap32 (fp);
329
330	memcpy (enc->cur, &fp, 4);
331	enc->cur += 4;
332	}
333	else	701	else
334	{	702	encode_float64 (enc, nv);
335	uint64_t fp = ecb_double_to_binary64 (nv);
336
337	*enc->cur++ = 0xe0 | 27;
338
339	if (!ecb_big_endian ())
340	fp = ecb_bswap64 (fp);
341
342	memcpy (enc->cur, &fp, 8);
343	enc->cur += 8;
344	}
345	}	703	}
346		704
347	static void	705	static void
348	encode_sv (enc_t *enc, SV *sv)	706	encode_sv (enc_t *enc, SV *sv)
349	{	707	{
…		…
351		709
352	if (SvPOKp (sv))	710	if (SvPOKp (sv))
353	{	711	{
354	STRLEN len;	712	STRLEN len;
355	char *str = SvPV (sv, len);	713	char *str = SvPV (sv, len);
356	encode_str (enc, SvUTF8 (sv), str, len);	714	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
357	}	715	}
358	else if (SvNOKp (sv))	716	else if (SvNOKp (sv))
359	encode_nv (enc, sv);	717	encode_nv (enc, sv);
360	else if (SvIOKp (sv))	718	else if (SvIOKp (sv))
361	{	719	encode_int (e,v sv);
362	if (SvIsUV (sv))
363	encode_uint (enc, 0x00, SvUVX (sv));
364	else if (SvIVX (sv) >= 0)
365	encode_uint (enc, 0x00, SvIVX (sv));
366	else
367	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
368	}
369	else if (SvROK (sv))	720	else if (SvROK (sv))
370	encode_rv (enc, SvRV (sv));	721	encode_rv (enc, SvRV (sv));
371	else if (!SvOK (sv))	722	else if (!SvOK (sv))
372	encode_ch (enc, 0xe0 | 22);	723	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
373	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	724	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
374	encode_ch (enc, 0xe0 | 23);	725	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
375	else	726	else
376	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	727	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
377	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	728	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
378	}	729	}
379		730
380	static SV *	731	static SV *
381	encode_cbor (SV *scalar, CBOR *cbor)	732	encode_cbor (SV *scalar, CBOR *cbor)
382	{	733	{
383	enc_t enc;	734	enc_t enc = { 0 };
384		735
385	enc.cbor = *cbor;	736	enc.cbor = *cbor;
386	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	737	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
387	enc.cur = SvPVX (enc.sv);	738	enc.cur = SvPVX (enc.sv);
388	enc.end = SvEND (enc.sv);	739	enc.end = SvEND (enc.sv);
389	enc.depth = 0;
390		740
391	SvPOK_only (enc.sv);	741	SvPOK_only (enc.sv);
		742
		743	if (cbor->flags & F_PACK_STRINGS)
		744	{
		745	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		746	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		747	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		748	}
		749
392	encode_sv (&enc, scalar);	750	encode_sv (&enc, scalar);
393		751
394	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	752	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
395	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	753	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
396		754
…		…
410	U8 *end; // end of input string	768	U8 *end; // end of input string
411	const char *err; // parse error, if != 0	769	const char *err; // parse error, if != 0
412	CBOR cbor;	770	CBOR cbor;
413	U32 depth; // recursion depth	771	U32 depth; // recursion depth
414	U32 maxdepth; // recursion depth limit	772	U32 maxdepth; // recursion depth limit
		773	AV *shareable;
		774	AV *stringref;
		775	SV *decode_tagged;
		776	SV *err_sv; // optional sv for error, needs to be freed
415	} dec_t;	777	} dec_t;
416		778
417	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	779	// set dec->err to ERRSV
		780	ecb_cold static void
		781	err_errsv (dec_t *dec)
		782	{
		783	if (!dec->err)
		784	{
		785	dec->err_sv = newSVsv (ERRSV);
418		786
419	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	787	// chop off the trailing \n
		788	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		789	*SvEND (dec->err_sv) = 0;
420		790
		791	dec->err = SvPVutf8_nolen (dec->err_sv);
		792	}
		793	}
		794
		795	// the following functions are used to reduce code size and help the compiler to optimise
		796	ecb_cold static void
		797	err_set (dec_t *dec, const char *reason)
		798	{
		799	if (!dec->err)
		800	dec->err = reason;
		801	}
		802
		803	ecb_cold static void
		804	err_unexpected_end (dec_t *dec)
		805	{
		806	err_set (dec, "unexpected end of CBOR data");
		807	}
		808
		809	#define ERR_DO(do) SB do; goto fail; SE
		810	#define ERR(reason) ERR_DO (err_set (dec, reason))
		811	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		812
		813	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		814
421	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	815	#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED)
422	#define DEC_DEC_DEPTH --dec->depth	816	#define DEC_DEC_DEPTH --dec->depth
423		817
424	static UV	818	static UV
425	decode_uint (dec_t *dec)	819	decode_uint (dec_t *dec)
426	{	820	{
427	switch (*dec->cur & 31)	821	U8 m = *dec->cur & MINOR_MASK;
428	{	822	++dec->cur;
429	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
430	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
431	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
432	return *dec->cur++ & 31;
433		823
434	case 24:	824	if (ecb_expect_true (m < LENGTH_EXT1))
		825	return m;
		826	else if (ecb_expect_true (m == LENGTH_EXT1))
		827	{
435	WANT (2);	828	WANT (1);
436	dec->cur += 2;	829	dec->cur += 1;
437	return dec->cur[-1];	830	return dec->cur[-1];
438		831	}
439	case 25:	832	else if (ecb_expect_true (m == LENGTH_EXT2))
		833	{
440	WANT (3);	834	WANT (2);
441	dec->cur += 3;	835	dec->cur += 2;
442	return (((UV)dec->cur[-2]) << 8)	836	return (((UV)dec->cur[-2]) << 8)
443	| ((UV)dec->cur[-1]);	837	| ((UV)dec->cur[-1]);
444		838	}
445	case 26:	839	else if (ecb_expect_true (m == LENGTH_EXT4))
		840	{
446	WANT (5);	841	WANT (4);
447	dec->cur += 5;	842	dec->cur += 4;
448	return (((UV)dec->cur[-4]) << 24)	843	return (((UV)dec->cur[-4]) << 24)
449	| (((UV)dec->cur[-3]) << 16)	844	| (((UV)dec->cur[-3]) << 16)
450	| (((UV)dec->cur[-2]) << 8)	845	| (((UV)dec->cur[-2]) << 8)
451	| ((UV)dec->cur[-1]);	846	| ((UV)dec->cur[-1]);
452		847	}
453	case 27:	848	else if (ecb_expect_true (m == LENGTH_EXT8))
		849	{
454	WANT (9);	850	WANT (8);
455	dec->cur += 9;	851	dec->cur += 8;
		852
		853	return
		854	#if UVSIZE < 8
		855	0
		856	#else
456	return (((UV)dec->cur[-8]) << 56)	857	(((UV)dec->cur[-8]) << 56)
457	| (((UV)dec->cur[-7]) << 48)	858	| (((UV)dec->cur[-7]) << 48)
458	| (((UV)dec->cur[-6]) << 40)	859	| (((UV)dec->cur[-6]) << 40)
459	| (((UV)dec->cur[-5]) << 32)	860	| (((UV)dec->cur[-5]) << 32)
		861	#endif
460	| (((UV)dec->cur[-4]) << 24)	862	| (((UV)dec->cur[-4]) << 24)
461	| (((UV)dec->cur[-3]) << 16)	863	| (((UV)dec->cur[-3]) << 16)
462	| (((UV)dec->cur[-2]) << 8)	864	| (((UV)dec->cur[-2]) << 8)
463	| ((UV)dec->cur[-1]);	865	| ((UV)dec->cur[-1]);
464		866	}
465	default:	867	else
466	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	868	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
467	}
468		869
469	fail:	870	fail:
470	return 0;	871	return 0;
471	}	872	}
472		873
…		…
477	{	878	{
478	AV *av = newAV ();	879	AV *av = newAV ();
479		880
480	DEC_INC_DEPTH;	881	DEC_INC_DEPTH;
481		882
482	if ((*dec->cur & 31) == 31)	883	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
483	{	884	{
484	++dec->cur;	885	++dec->cur;
485		886
486	for (;;)	887	for (;;)
487	{	888	{
488	WANT (1);	889	WANT (1);
489		890
490	if (*dec->cur == (0xe0 | 31))	891	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
491	{	892	{
492	++dec->cur;	893	++dec->cur;
493	break;	894	break;
494	}	895	}
495		896
496	av_push (av, decode_sv (dec));	897	av_push (av, decode_sv (dec));
497	}	898	}
498	}	899	}
499	else	900	else
500	{	901	{
501	int i, len = decode_uint (dec);	902	UV i, len = decode_uint (dec);
502		903
		904	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
503	av_fill (av, len - 1);	905	av_fill (av, len - 1);
504		906
505	for (i = 0; i < len; ++i)	907	for (i = 0; i < len; ++i)
506	AvARRAY (av)[i] = decode_sv (dec);	908	AvARRAY (av)[i] = decode_sv (dec);
507	}	909	}
508		910
509	DEC_DEC_DEPTH;	911	DEC_DEC_DEPTH;
510	return newRV_noinc ((SV *)av);	912	return newRV_noinc ((SV *)av);
511		913
512	fail:	914	fail:
513	SvREFCNT_dec (av);	915	SvREFCNT_dec_NN (av);
514	DEC_DEC_DEPTH;	916	DEC_DEC_DEPTH;
515	return &PL_sv_undef;	917	return &PL_sv_undef;
516	}	918	}
517		919
		920	static void
		921	decode_he (dec_t *dec, HV *hv)
		922	{
		923	// for speed reasons, we specialcase single-string
		924	// byte or utf-8 strings as keys, but only when !stringref
		925
		926	if (ecb_expect_true (!dec->stringref))
		927	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		928	{
		929	STRLEN len = decode_uint (dec);
		930	char *key = (char *)dec->cur;
		931
		932	WANT (len);
		933	dec->cur += len;
		934
		935	hv_store (hv, key, len, decode_sv (dec), 0);
		936
		937	return;
		938	}
		939	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		940	{
		941	STRLEN len = decode_uint (dec);
		942	char *key = (char *)dec->cur;
		943
		944	WANT (len);
		945	dec->cur += len;
		946
		947	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		948	if (!is_utf8_string (key, len))
		949	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		950
		951	hv_store (hv, key, -len, decode_sv (dec), 0);
		952
		953	return;
		954	}
		955
		956	SV *k = decode_sv (dec);
		957	SV *v = decode_sv (dec);
		958
		959	// we leak memory if uncaught exceptions are thrown by random magical
		960	// methods, and this is hopefully the only place where it can happen,
		961	// so if there is a chance of an exception, take the very slow path.
		962	// since catching exceptions is "undocumented/internal/forbidden" by
		963	// the new p5p powers, we need to call out to a perl function :/
		964	if (ecb_expect_false (SvAMAGIC (k)))
		965	{
		966	dSP;
		967
		968	ENTER; SAVETMPS;
		969	PUSHMARK (SP);
		970	EXTEND (SP, 3);
		971	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		972	PUSHs (sv_2mortal (k));
		973	PUSHs (sv_2mortal (v));
		974
		975	PUTBACK;
		976	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		977	SPAGAIN;
		978
		979	FREETMPS; LEAVE;
		980
		981	if (SvTRUE (ERRSV))
		982	ERR_ERRSV;
		983
		984	return;
		985	}
		986
		987	hv_store_ent (hv, k, v, 0);
		988	SvREFCNT_dec_NN (k);
		989
		990	fail:
		991	;
		992	}
		993
518	static SV *	994	static SV *
519	decode_hv (dec_t *dec)	995	decode_hv (dec_t *dec)
520	{	996	{
521	HV *hv = newHV ();	997	HV *hv = newHV ();
522		998
523	DEC_INC_DEPTH;	999	DEC_INC_DEPTH;
524		1000
525	if ((*dec->cur & 31) == 31)	1001	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
526	{	1002	{
527	++dec->cur;	1003	++dec->cur;
528		1004
529	for (;;)	1005	for (;;)
530	{	1006	{
531	WANT (1);	1007	WANT (1);
532		1008
533	if (*dec->cur == (0xe0 | 31))	1009	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
534	{	1010	{
535	++dec->cur;	1011	++dec->cur;
536	break;	1012	break;
537	}	1013	}
538		1014
539	SV *k = decode_sv (dec);	1015	decode_he (dec, hv);
540	SV *v = decode_sv (dec);
541
542	hv_store_ent (hv, k, v, 0);
543	}	1016	}
544	}	1017	}
545	else	1018	else
546	{	1019	{
547	int len = decode_uint (dec);	1020	UV pairs = decode_uint (dec);
548		1021
		1022	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1023
549	while (len--)	1024	while (pairs--)
550	{	1025	decode_he (dec, hv);
551	SV *k = decode_sv (dec);
552	SV *v = decode_sv (dec);
553
554	hv_store_ent (hv, k, v, 0);
555	}
556	}	1026	}
557		1027
558	DEC_DEC_DEPTH;	1028	DEC_DEC_DEPTH;
559	return newRV_noinc ((SV *)hv);	1029	return newRV_noinc ((SV *)hv);
560		1030
561	fail:	1031	fail:
562	SvREFCNT_dec (hv);	1032	SvREFCNT_dec_NN (hv);
563	DEC_DEC_DEPTH;	1033	DEC_DEC_DEPTH;
564	return &PL_sv_undef;	1034	return &PL_sv_undef;
565	}	1035	}
566		1036
567	static SV *	1037	static SV *
568	decode_str (dec_t *dec, int utf8)	1038	decode_str (dec_t *dec, int utf8)
569	{	1039	{
570	SV *sv = 0;	1040	SV *sv = 0;
571		1041
572	if ((*dec->cur & 31) == 31)	1042	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
573	{	1043	{
		1044	// indefinite length strings
574	++dec->cur;	1045	++dec->cur;
575		1046
		1047	U8 major = *dec->cur & MAJOR_MISC;
		1048
576	sv = newSVpvn ("", 0);	1049	sv = newSVpvn ("", 0);
577		1050
578	// not very fast, and certainly not robust against illegal input
579	for (;;)	1051	for (;;)
580	{	1052	{
581	WANT (1);	1053	WANT (1);
582		1054
583	if (*dec->cur == (0xe0 | 31))	1055	if ((*dec->cur - major) > LENGTH_EXT8)
		1056	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
584	{	1057	{
585	++dec->cur;	1058	++dec->cur;
586	break;	1059	break;
587	}	1060	}
		1061	else
		1062	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
588		1063
589	sv_catsv (sv, decode_sv (dec));	1064	STRLEN len = decode_uint (dec);
		1065
		1066	WANT (len);
		1067	sv_catpvn (sv, dec->cur, len);
		1068	dec->cur += len;
590	}	1069	}
591	}	1070	}
592	else	1071	else
593	{	1072	{
594	STRLEN len = decode_uint (dec);	1073	STRLEN len = decode_uint (dec);
595		1074
596	WANT (len);	1075	WANT (len);
597	sv = newSVpvn (dec->cur, len);	1076	sv = newSVpvn (dec->cur, len);
598	dec->cur += len;	1077	dec->cur += len;
		1078
		1079	if (ecb_expect_false (dec->stringref)
		1080	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		1081	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
599	}	1082	}
600		1083
601	if (utf8)	1084	if (utf8)
		1085	{
		1086	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		1087	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		1088	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		1089
602	SvUTF8_on (sv);	1090	SvUTF8_on (sv);
		1091	}
603		1092
604	return sv;	1093	return sv;
605		1094
606	fail:	1095	fail:
607	SvREFCNT_dec (sv);	1096	SvREFCNT_dec (sv);
…		…
609	}	1098	}
610		1099
611	static SV *	1100	static SV *
612	decode_tagged (dec_t *dec)	1101	decode_tagged (dec_t *dec)
613	{	1102	{
		1103	SV *sv = 0;
614	UV tag = decode_uint (dec);	1104	UV tag = decode_uint (dec);
		1105
		1106	WANT (1);
		1107
		1108	switch (tag)
		1109	{
		1110	case CBOR_TAG_MAGIC:
615	SV *sv = decode_sv (dec);	1111	sv = decode_sv (dec);
		1112	break;
616		1113
617	if (tag == 55799) // 2.4.5 Self-Describe CBOR	1114	case CBOR_TAG_INDIRECTION:
		1115	sv = newRV_noinc (decode_sv (dec));
		1116	break;
		1117
		1118	case CBOR_TAG_STRINGREF_NAMESPACE:
		1119	{
		1120	// do not use SAVETMPS/FREETMPS, as these will
		1121	// erase mortalised caches, e.g. "shareable"
		1122	ENTER;
		1123
		1124	SAVESPTR (dec->stringref);
		1125	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1126
		1127	sv = decode_sv (dec);
		1128
		1129	LEAVE;
		1130	}
		1131	break;
		1132
		1133	case CBOR_TAG_STRINGREF:
		1134	{
		1135	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1136	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1137
		1138	UV idx = decode_uint (dec);
		1139
		1140	if (!dec->stringref || idx >= (UV)(1 + AvFILLp (dec->stringref)))
		1141	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1142
		1143	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1144	}
		1145	break;
		1146
		1147	case CBOR_TAG_VALUE_SHAREABLE:
		1148	{
		1149	if (ecb_expect_false (!dec->shareable))
		1150	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1151
		1152	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1153	{
		1154	sv = newSV (0);
		1155	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1156
		1157	SV *osv = decode_sv (dec);
		1158	sv_setsv (sv, osv);
		1159	SvREFCNT_dec_NN (osv);
		1160	}
		1161	else
		1162	{
		1163	av_push (dec->shareable, &PL_sv_undef);
		1164	int idx = AvFILLp (dec->shareable);
		1165	sv = decode_sv (dec);
		1166	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1167	}
		1168	}
		1169	break;
		1170
		1171	case CBOR_TAG_VALUE_SHAREDREF:
		1172	{
		1173	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1174	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1175
		1176	UV idx = decode_uint (dec);
		1177
		1178	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
		1179	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1180
		1181	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1182
		1183	if (sv == &PL_sv_undef)
		1184	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1185	}
		1186	break;
		1187
		1188	case CBOR_TAG_PERL_OBJECT:
		1189	{
		1190	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1191	goto filter;
		1192
		1193	sv = decode_sv (dec);
		1194
		1195	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1196	ERR ("corrupted CBOR data (non-array perl object)");
		1197
		1198	AV *av = (AV *)SvRV (sv);
		1199	int len = av_len (av) + 1;
		1200	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1201
		1202	if (!stash)
		1203	ERR ("cannot decode perl-object (package does not exist)");
		1204
		1205	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1206
		1207	if (!method)
		1208	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1209
		1210	dSP;
		1211
		1212	ENTER; SAVETMPS;
		1213	PUSHMARK (SP);
		1214	EXTEND (SP, len + 1);
		1215	// we re-bless the reference to get overload and other niceties right
		1216	PUSHs (*av_fetch (av, 0, 1));
		1217	PUSHs (sv_cbor);
		1218
		1219	int i;
		1220
		1221	for (i = 1; i < len; ++i)
		1222	PUSHs (*av_fetch (av, i, 1));
		1223
		1224	PUTBACK;
		1225	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1226	SPAGAIN;
		1227
		1228	if (SvTRUE (ERRSV))
		1229	{
		1230	FREETMPS; LEAVE;
		1231	ERR_ERRSV;
		1232	}
		1233
		1234	SvREFCNT_dec_NN (sv);
		1235	sv = SvREFCNT_inc (POPs);
		1236
		1237	PUTBACK;
		1238
		1239	FREETMPS; LEAVE;
		1240	}
		1241	break;
		1242
		1243	default:
		1244	filter:
		1245	{
		1246	SV *tag_sv = newSVuv (tag);
		1247
		1248	sv = decode_sv (dec);
		1249
		1250	dSP;
		1251	ENTER; SAVETMPS;
		1252	PUSHMARK (SP);
		1253	EXTEND (SP, 2);
		1254	PUSHs (tag_sv);
		1255	PUSHs (sv);
		1256
		1257	PUTBACK;
		1258	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1259	SPAGAIN;
		1260
		1261	if (SvTRUE (ERRSV))
		1262	{
		1263	SvREFCNT_dec_NN (tag_sv);
		1264	FREETMPS; LEAVE;
		1265	ERR_ERRSV;
		1266	}
		1267
		1268	if (count)
		1269	{
		1270	SvREFCNT_dec_NN (tag_sv);
		1271	SvREFCNT_dec_NN (sv);
		1272	sv = SvREFCNT_inc_NN (TOPs);
		1273	SP -= count;
		1274	}
		1275	else
		1276	{
		1277	AV *av = newAV ();
		1278	av_push (av, tag_sv);
		1279	av_push (av, sv);
		1280
		1281	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1282	? cbor_tagged_stash
		1283	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1284	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1285	}
		1286
		1287	PUTBACK;
		1288
		1289	FREETMPS; LEAVE;
		1290	}
		1291	break;
		1292	}
		1293
618	return sv;	1294	return sv;
619		1295
620	AV *av = newAV ();	1296	fail:
621	av_push (av, newSVuv (tag));	1297	SvREFCNT_dec (sv);
622	av_push (av, sv);	1298	return &PL_sv_undef;
623
624	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
625	? cbor_tagged_stash
626	: gv_stashpv ("CBOR::XS::Tagged" , 1);
627
628	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);
629	}	1299	}
630		1300
631	static SV *	1301	static SV *
632	decode_sv (dec_t *dec)	1302	decode_sv (dec_t *dec)
633	{	1303	{
634	WANT (1);	1304	WANT (1);
635		1305
636	switch (*dec->cur >> 5)	1306	switch (*dec->cur >> MAJOR_SHIFT)
637	{	1307	{
638	case 0: // unsigned int	1308	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
639	return newSVuv (decode_uint (dec));	1309	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
640	case 1: // negative int	1310	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
641	return newSViv (-1 - (IV)decode_uint (dec));	1311	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
642	case 2: // octet string	1312	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
643	return decode_str (dec, 0);	1313	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
644	case 3: // utf-8 string	1314	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
645	return decode_str (dec, 1);	1315
646	case 4: // array	1316	case MAJOR_MISC >> MAJOR_SHIFT:
647	return decode_av (dec);
648	case 5: // map
649	return decode_hv (dec);
650	case 6: // tag
651	return decode_tagged (dec);
652	case 7: // misc
653	switch (*dec->cur++ & 31)	1317	switch (*dec->cur++ & MINOR_MASK)
654	{	1318	{
655	case 20:	1319	case SIMPLE_FALSE:
656	#if CBOR_SLOW	1320	#if CBOR_SLOW
657	cbor_false = get_bool ("CBOR::XS::false");	1321	types_false = get_bool ("Types::Serialiser::false");
658	#endif	1322	#endif
659	return newSVsv (cbor_false);	1323	return newSVsv (types_false);
660	case 21:	1324	case SIMPLE_TRUE:
661	#if CBOR_SLOW	1325	#if CBOR_SLOW
662	cbor_true = get_bool ("CBOR::XS::true");	1326	types_true = get_bool ("Types::Serialiser::true");
663	#endif	1327	#endif
664	return newSVsv (cbor_true);	1328	return newSVsv (types_true);
665	case 22:	1329	case SIMPLE_NULL:
666	return newSVsv (&PL_sv_undef);	1330	return newSVsv (&PL_sv_undef);
		1331	case SIMPLE_UNDEF:
		1332	#if CBOR_SLOW
		1333	types_error = get_bool ("Types::Serialiser::error");
		1334	#endif
		1335	return newSVsv (types_error);
667		1336
668	case 25:	1337	case MISC_FLOAT16:
669	{	1338	{
670	WANT (2);	1339	WANT (2);
671		1340
672	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1341	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
673	dec->cur += 2;	1342	dec->cur += 2;
674		1343
675	return newSVnv (ecb_binary16_to_float (fp));	1344	return newSVnv (ecb_binary16_to_float (fp));
676	}	1345	}
677		1346
678	case 26:	1347	case MISC_FLOAT32:
679	{	1348	{
680	uint32_t fp;	1349	uint32_t fp;
681	WANT (4);	1350	WANT (4);
682	memcpy (&fp, dec->cur, 4);	1351	memcpy (&fp, dec->cur, 4);
683	dec->cur += 4;	1352	dec->cur += 4;
…		…
686	fp = ecb_bswap32 (fp);	1355	fp = ecb_bswap32 (fp);
687		1356
688	return newSVnv (ecb_binary32_to_float (fp));	1357	return newSVnv (ecb_binary32_to_float (fp));
689	}	1358	}
690		1359
691	case 27:	1360	case MISC_FLOAT64:
692	{	1361	{
693	uint64_t fp;	1362	uint64_t fp;
694	WANT (8);	1363	WANT (8);
695	memcpy (&fp, dec->cur, 8);	1364	memcpy (&fp, dec->cur, 8);
696	dec->cur += 8;	1365	dec->cur += 8;
…		…
699	fp = ecb_bswap64 (fp);	1368	fp = ecb_bswap64 (fp);
700		1369
701	return newSVnv (ecb_binary64_to_double (fp));	1370	return newSVnv (ecb_binary64_to_double (fp));
702	}	1371	}
703		1372
704	// 0..19 unassigned	1373	// 0..19 unassigned simple
705	// 24 reserved + unassigned (reserved values are not encodable)	1374	// 24 reserved + unassigned simple (reserved values are not encodable)
		1375	// 28-30 unassigned misc
		1376	// 31 break code
706	default:	1377	default:
707	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1378	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
708	}	1379	}
709		1380
710	break;	1381	break;
711	}	1382	}
712		1383
…		…
715	}	1386	}
716		1387
717	static SV *	1388	static SV *
718	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1389	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
719	{	1390	{
720	dec_t dec;	1391	dec_t dec = { 0 };
721	SV *sv;	1392	SV *sv;
		1393	STRLEN len;
		1394	char *data = SvPVbyte (string, len);
722		1395
723	/* work around bugs in 5.10 where manipulating magic values
724	* makes perl ignore the magic in subsequent accesses.
725	* also make a copy of non-PV values, to get them into a clean
726	* state (SvPV should do that, but it's buggy, see below).
727	*/
728	/*SvGETMAGIC (string);*/
729	if (SvMAGICAL (string) || !SvPOK (string))
730	string = sv_2mortal (newSVsv (string));
731
732	SvUPGRADE (string, SVt_PV);
733
734	/* work around a bug in perl 5.10, which causes SvCUR to fail an
735	* assertion with -DDEBUGGING, although SvCUR is documented to
736	* return the xpv_cur field which certainly exists after upgrading.
737	* according to nicholas clark, calling SvPOK fixes this.
738	* But it doesn't fix it, so try another workaround, call SvPV_nolen
739	* and hope for the best.
740	* Damnit, SvPV_nolen still trips over yet another assertion. This
741	* assertion business is seriously broken, try yet another workaround
742	* for the broken -DDEBUGGING.
743	*/
744	{
745	#ifdef DEBUGGING
746	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
747	#else
748	STRLEN offset = SvCUR (string);
749	#endif
750
751	if (offset > cbor->max_size && cbor->max_size)	1396	if (len > cbor->max_size && cbor->max_size)
752	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1397	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
753	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1398	(unsigned long)len, (unsigned long)cbor->max_size);
754	}
755
756	sv_utf8_downgrade (string, 0);
757		1399
758	dec.cbor = *cbor;	1400	dec.cbor = *cbor;
759	dec.cur = (U8 *)SvPVX (string);	1401	dec.cur = (U8 *)data;
760	dec.end = (U8 *)SvEND (string);	1402	dec.end = (U8 *)data + len;
761	dec.err = 0;
762	dec.depth = 0;
763		1403
764	sv = decode_sv (&dec);	1404	sv = decode_sv (&dec);
765		1405
766	if (offset_return)	1406	if (offset_return)
767	*offset_return = dec.cur;	1407	*offset_return = dec.cur;
…		…
770	if (dec.cur != dec.end && !dec.err)	1410	if (dec.cur != dec.end && !dec.err)
771	dec.err = "garbage after CBOR object";	1411	dec.err = "garbage after CBOR object";
772		1412
773	if (dec.err)	1413	if (dec.err)
774	{	1414	{
		1415	if (dec.shareable)
		1416	{
		1417	// need to break cyclic links, which would all be in shareable
		1418	int i;
		1419	SV **svp;
		1420
		1421	for (i = av_len (dec.shareable) + 1; i--; )
		1422	if ((svp = av_fetch (dec.shareable, i, 0)))
		1423	sv_setsv (*svp, &PL_sv_undef);
		1424	}
		1425
775	SvREFCNT_dec (sv);	1426	SvREFCNT_dec_NN (sv);
		1427
		1428	if (dec.err_sv)
		1429	sv_2mortal (dec.err_sv);
		1430
776	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1431	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
777	}	1432	}
778		1433
779	sv = sv_2mortal (sv);	1434	sv = sv_2mortal (sv);
780		1435
781	return sv;	1436	return sv;
782	}	1437	}
783		1438
		1439	/////////////////////////////////////////////////////////////////////////////
		1440	// incremental parser
		1441
		1442	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1443
		1444	// returns 0 for notyet, 1 for success or error
		1445	static int
		1446	incr_parse (CBOR *self, SV *cborstr)
		1447	{
		1448	STRLEN cur;
		1449	SvPV (cborstr, cur);
		1450
		1451	while (ecb_expect_true (self->incr_need <= cur))
		1452	{
		1453	// table of integer count bytes
		1454	static I8 incr_len[MINOR_MASK + 1] = {
		1455	0, 0, 0, 0, 0, 0, 0, 0,
		1456	0, 0, 0, 0, 0, 0, 0, 0,
		1457	0, 0, 0, 0, 0, 0, 0, 0,
		1458	1, 2, 4, 8,-1,-1,-1,-2
		1459	};
		1460
		1461	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1462	U8 m = *p & MINOR_MASK;
		1463	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1464	I8 ilen = incr_len[m];
		1465
		1466	self->incr_need = self->incr_pos + 1;
		1467
		1468	if (ecb_expect_false (ilen < 0))
		1469	{
		1470	if (m != MINOR_INDEF)
		1471	return 1; // error
		1472
		1473	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1474	{
		1475	if (count >= 0)
		1476	return 1; // error
		1477
		1478	count = 1;
		1479	}
		1480	else
		1481	{
		1482	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1483	count = -1;
		1484	}
		1485	}
		1486	else
		1487	{
		1488	self->incr_need += ilen;
		1489	if (ecb_expect_false (self->incr_need > cur))
		1490	return 0;
		1491
		1492	int major = *p >> MAJOR_SHIFT;
		1493
		1494	switch (major)
		1495	{
		1496	case MAJOR_TAG >> MAJOR_SHIFT:
		1497	++count; // tags merely prefix another value
		1498	break;
		1499
		1500	case MAJOR_BYTES >> MAJOR_SHIFT:
		1501	case MAJOR_TEXT >> MAJOR_SHIFT:
		1502	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1503	case MAJOR_MAP >> MAJOR_SHIFT:
		1504	{
		1505	UV len;
		1506
		1507	if (ecb_expect_false (ilen))
		1508	{
		1509	len = 0;
		1510
		1511	do {
		1512	len = (len << 8) | *++p;
		1513	} while (--ilen);
		1514	}
		1515	else
		1516	len = m;
		1517
		1518	switch (major)
		1519	{
		1520	case MAJOR_BYTES >> MAJOR_SHIFT:
		1521	case MAJOR_TEXT >> MAJOR_SHIFT:
		1522	self->incr_need += len;
		1523	if (ecb_expect_false (self->incr_need > cur))
		1524	return 0;
		1525
		1526	break;
		1527
		1528	case MAJOR_MAP >> MAJOR_SHIFT:
		1529	len <<= 1;
		1530	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1531	if (len)
		1532	{
		1533	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1534	count = len + 1;
		1535	}
		1536	break;
		1537	}
		1538	}
		1539	}
		1540	}
		1541
		1542	self->incr_pos = self->incr_need;
		1543
		1544	if (count > 0)
		1545	{
		1546	while (!--count)
		1547	{
		1548	if (!AvFILLp (self->incr_count))
		1549	return 1; // done
		1550
		1551	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1552	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1553	}
		1554
		1555	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1556	}
		1557	}
		1558
		1559	return 0;
		1560	}
		1561
		1562
784	/////////////////////////////////////////////////////////////////////////////	1563	/////////////////////////////////////////////////////////////////////////////
785	// XS interface functions	1564	// XS interface functions
786		1565
787	MODULE = CBOR::XS PACKAGE = CBOR::XS	1566	MODULE = CBOR::XS PACKAGE = CBOR::XS
788		1567
789	BOOT:	1568	BOOT:
790	{	1569	{
791	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1570	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
792	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);
793	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);	1571	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
794		1572
795	cbor_true = get_bool ("CBOR::XS::true");	1573	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
796	cbor_false = get_bool ("CBOR::XS::false");	1574	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1575
		1576	types_true = get_bool ("Types::Serialiser::true" );
		1577	types_false = get_bool ("Types::Serialiser::false");
		1578	types_error = get_bool ("Types::Serialiser::error");
		1579
		1580	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1581
		1582	sv_cbor = newSVpv ("CBOR", 0);
		1583	SvREADONLY_on (sv_cbor);
		1584
		1585	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
797	}	1586	}
798		1587
799	PROTOTYPES: DISABLE	1588	PROTOTYPES: DISABLE
800		1589
801	void CLONE (...)	1590	void CLONE (...)
802	CODE:	1591	CODE:
803	cbor_stash = 0;	1592	cbor_stash = 0;
804	cbor_boolean_stash = 0;
805	cbor_tagged_stash = 0;	1593	cbor_tagged_stash = 0;
		1594	types_error_stash = 0;
		1595	types_boolean_stash = 0;
806		1596
807	void new (char *klass)	1597	void new (char *klass)
808	PPCODE:	1598	PPCODE:
809	{	1599	{
810	SV *pv = NEWSV (0, sizeof (CBOR));	1600	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
818		1608
819	void shrink (CBOR *self, int enable = 1)	1609	void shrink (CBOR *self, int enable = 1)
820	ALIAS:	1610	ALIAS:
821	shrink = F_SHRINK	1611	shrink = F_SHRINK
822	allow_unknown = F_ALLOW_UNKNOWN	1612	allow_unknown = F_ALLOW_UNKNOWN
		1613	allow_sharing = F_ALLOW_SHARING
		1614	allow_cycles = F_ALLOW_CYCLES
		1615	forbid_objects = F_FORBID_OBJECTS
		1616	pack_strings = F_PACK_STRINGS
		1617	text_keys = F_TEXT_KEYS
		1618	text_strings = F_TEXT_STRINGS
		1619	validate_utf8 = F_VALIDATE_UTF8
823	PPCODE:	1620	PPCODE:
824	{	1621	{
825	if (enable)	1622	if (enable)
826	self->flags |= ix;	1623	self->flags |= ix;
827	else	1624	else
…		…
832		1629
833	void get_shrink (CBOR *self)	1630	void get_shrink (CBOR *self)
834	ALIAS:	1631	ALIAS:
835	get_shrink = F_SHRINK	1632	get_shrink = F_SHRINK
836	get_allow_unknown = F_ALLOW_UNKNOWN	1633	get_allow_unknown = F_ALLOW_UNKNOWN
		1634	get_allow_sharing = F_ALLOW_SHARING
		1635	get_allow_cycles = F_ALLOW_CYCLES
		1636	get_forbid_objects = F_FORBID_OBJECTS
		1637	get_pack_strings = F_PACK_STRINGS
		1638	get_text_keys = F_TEXT_KEYS
		1639	get_text_strings = F_TEXT_STRINGS
		1640	get_validate_utf8 = F_VALIDATE_UTF8
837	PPCODE:	1641	PPCODE:
838	XPUSHs (boolSV (self->flags & ix));	1642	XPUSHs (boolSV (self->flags & ix));
839		1643
840	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1644	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
841	PPCODE:	1645	PPCODE:
…		…
857	CODE:	1661	CODE:
858	RETVAL = self->max_size;	1662	RETVAL = self->max_size;
859	OUTPUT:	1663	OUTPUT:
860	RETVAL	1664	RETVAL
861		1665
862	#if 0 //TODO	1666	void filter (CBOR *self, SV *filter = 0)
863
864	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
865	PPCODE:	1667	PPCODE:
866	{
867	SvREFCNT_dec (self->cb_object);	1668	SvREFCNT_dec (self->filter);
868	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1669	self->filter = filter ? newSVsv (filter) : filter;
869
870	XPUSHs (ST (0));	1670	XPUSHs (ST (0));
871	}
872		1671
873	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1672	SV *get_filter (CBOR *self)
874	PPCODE:	1673	CODE:
875	{	1674	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
876	if (!self->cb_sk_object)	1675	OUTPUT:
877	self->cb_sk_object = newHV ();	1676	RETVAL
878
879	if (SvOK (cb))
880	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
881	else
882	{
883	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
884
885	if (!HvKEYS (self->cb_sk_object))
886	{
887	SvREFCNT_dec (self->cb_sk_object);
888	self->cb_sk_object = 0;
889	}
890	}
891
892	XPUSHs (ST (0));
893	}
894
895	#endif
896		1677
897	void encode (CBOR *self, SV *scalar)	1678	void encode (CBOR *self, SV *scalar)
898	PPCODE:	1679	PPCODE:
899	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1680	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
900	XPUSHs (scalar);	1681	XPUSHs (scalar);
…		…
913	EXTEND (SP, 2);	1694	EXTEND (SP, 2);
914	PUSHs (sv);	1695	PUSHs (sv);
915	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1696	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
916	}	1697	}
917		1698
918	#if 0	1699	void incr_parse (CBOR *self, SV *cborstr)
		1700	ALIAS:
		1701	incr_parse_multiple = 1
		1702	PPCODE:
		1703	{
		1704	if (SvUTF8 (cborstr))
		1705	sv_utf8_downgrade (cborstr, 0);
		1706
		1707	if (!self->incr_count)
		1708	{
		1709	self->incr_count = newAV ();
		1710	self->incr_pos = 0;
		1711	self->incr_need = 1;
		1712
		1713	av_push (self->incr_count, newSViv (1));
		1714	}
		1715
		1716	do
		1717	{
		1718	if (!incr_parse (self, cborstr))
		1719	{
		1720	if (self->incr_need > self->max_size && self->max_size)
		1721	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1722	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1723
		1724	break;
		1725	}
		1726
		1727	SV *sv;
		1728	char *offset;
		1729
		1730	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1731	XPUSHs (sv);
		1732
		1733	sv_chop (cborstr, offset);
		1734
		1735	av_clear (self->incr_count);
		1736	av_push (self->incr_count, newSViv (1));
		1737
		1738	self->incr_pos = 0;
		1739	self->incr_need = self->incr_pos + 1;
		1740	}
		1741	while (ix);
		1742	}
		1743
		1744	void incr_reset (CBOR *self)
		1745	CODE:
		1746	{
		1747	SvREFCNT_dec (self->incr_count);
		1748	self->incr_count = 0;
		1749	}
919		1750
920	void DESTROY (CBOR *self)	1751	void DESTROY (CBOR *self)
921	CODE:	1752	PPCODE:
922	SvREFCNT_dec (self->cb_sk_object);	1753	cbor_free (self);
923	SvREFCNT_dec (self->cb_object);
924
925	#endif
926		1754
927	PROTOTYPES: ENABLE	1755	PROTOTYPES: ENABLE
928		1756
929	void encode_cbor (SV *scalar)	1757	void encode_cbor (SV *scalar)
		1758	ALIAS:
		1759	encode_cbor = 0
		1760	encode_cbor_sharing = F_ALLOW_SHARING
930	PPCODE:	1761	PPCODE:
931	{	1762	{
932	CBOR cbor;	1763	CBOR cbor;
933	cbor_init (&cbor);	1764	cbor_init (&cbor);
		1765	cbor.flags |= ix;
934	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1766	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
935	XPUSHs (scalar);	1767	XPUSHs (scalar);
936	}	1768	}
937		1769
938	void decode_cbor (SV *cborstr)	1770	void decode_cbor (SV *cborstr)
…		…
942	cbor_init (&cbor);	1774	cbor_init (&cbor);
943	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1775	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
944	XPUSHs (cborstr);	1776	XPUSHs (cborstr);
945	}	1777	}
946		1778
		1779	#ifdef __AFL_COMPILER
		1780
		1781	void
		1782	afl_init ()
		1783	CODE:
		1784	__AFL_INIT ();
		1785
		1786	int
		1787	afl_loop (unsigned int count = 10000)
		1788	CODE:
		1789	RETVAL = __AFL_LOOP (count);
		1790	OUTPUT:
		1791	RETVAL
		1792
		1793	#endif
		1794

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