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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.5 by root, Sat Oct 26 21:14:20 2013 UTC vs.
Revision 1.69 by root, Mon Nov 30 20:38:25 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_INT = 1,
		109	AS_BYTES = 2,
		110	AS_TEXT = 3,
		111	AS_FLOAT16 = 4,
		112	AS_FLOAT32 = 5,
		113	AS_FLOAT64 = 6,
		114	// possibly future enhancements: (generic) float, (generic) string
		115	};
		116
14	#define F_SHRINK 0x00000200UL	117	#define F_SHRINK 0x00000001UL
15	#define F_ALLOW_UNKNOWN 0x00002000UL	118	#define F_ALLOW_UNKNOWN 0x00000002UL
		119	#define F_ALLOW_SHARING 0x00000004UL
		120	#define F_ALLOW_CYCLES 0x00000008UL
		121	#define F_FORBID_OBJECTS 0x00000010UL
		122	#define F_PACK_STRINGS 0x00000020UL
		123	#define F_TEXT_KEYS 0x00000040UL
		124	#define F_TEXT_STRINGS 0x00000080UL
		125	#define F_VALIDATE_UTF8 0x00000100UL
16		126
17	#define INIT_SIZE 32 // initial scalar size to be allocated	127	#define INIT_SIZE 32 // initial scalar size to be allocated
18		128
19	#define SB do {	129	#define SB do {
20	#define SE } while (0)	130	#define SE } while (0)
…		…
31	#else	141	#else
32	# define CBOR_SLOW 0	142	# define CBOR_SLOW 0
33	# define CBOR_STASH cbor_stash	143	# define CBOR_STASH cbor_stash
34	#endif	144	#endif
35		145
36	static HV *cbor_stash, *cbor_boolean_stash; // CBOR::XS::	146	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
37	static SV *cbor_true, *cbor_false;	147	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
38		148
39	typedef struct {	149	typedef struct {
40	U32 flags;	150	U32 flags;
41	U32 max_depth;	151	U32 max_depth;
42	STRLEN max_size;	152	STRLEN max_size;
		153	SV *filter;
43		154
44	SV *cb_object;	155	// for the incremental parser
45	HV *cb_sk_object;	156	STRLEN incr_pos; // the current offset into the text
		157	STRLEN incr_need; // minimum bytes needed to decode
		158	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
46	} CBOR;	159	} CBOR;
47		160
48	ecb_inline void	161	ecb_inline void
49	cbor_init (CBOR *cbor)	162	cbor_init (CBOR *cbor)
50	{	163	{
51	Zero (cbor, 1, CBOR);	164	Zero (cbor, 1, CBOR);
52	cbor->max_depth = 512;	165	cbor->max_depth = 512;
		166	}
		167
		168	ecb_inline void
		169	cbor_free (CBOR *cbor)
		170	{
		171	SvREFCNT_dec (cbor->filter);
		172	SvREFCNT_dec (cbor->incr_count);
53	}	173	}
54		174
55	/////////////////////////////////////////////////////////////////////////////	175	/////////////////////////////////////////////////////////////////////////////
56	// utility functions	176	// utility functions
57		177
…		…
79	SvPV_renew (sv, SvCUR (sv) + 1);	199	SvPV_renew (sv, SvCUR (sv) + 1);
80	#endif	200	#endif
81	}	201	}
82	}	202	}
83		203
84	/////////////////////////////////////////////////////////////////////////////	204	// minimum length of a string to be registered for stringref
85	// fp hell	205	ecb_inline int
86		206	minimum_string_length (UV idx)
87	//TODO	207	{
		208	return idx <= 23 ? 3
		209	: idx <= 0xffU ? 4
		210	: idx <= 0xffffU ? 5
		211	: idx <= 0xffffffffU ? 7
		212	: 11;
		213	}
88		214
89	/////////////////////////////////////////////////////////////////////////////	215	/////////////////////////////////////////////////////////////////////////////
90	// encoder	216	// encoder
91		217
92	// structure used for encoding CBOR	218	// structure used for encoding CBOR
…		…
95	char *cur; // SvPVX (sv) + current output position	221	char *cur; // SvPVX (sv) + current output position
96	char *end; // SvEND (sv)	222	char *end; // SvEND (sv)
97	SV *sv; // result scalar	223	SV *sv; // result scalar
98	CBOR cbor;	224	CBOR cbor;
99	U32 depth; // recursion level	225	U32 depth; // recursion level
		226	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		227	UV stringref_idx;
		228	HV *shareable; // ptr => index, or 0
		229	UV shareable_idx;
100	} enc_t;	230	} enc_t;
101		231
102	ecb_inline void	232	ecb_inline void
103	need (enc_t *enc, STRLEN len)	233	need (enc_t *enc, STRLEN len)
104	{	234	{
105	if (ecb_expect_false (enc->cur + len >= enc->end))	235	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
106	{	236	{
107	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	237	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
108	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	238	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
109	enc->cur = SvPVX (enc->sv) + cur;	239	enc->cur = SvPVX (enc->sv) + cur;
110	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	240	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
…		…
116	{	246	{
117	need (enc, 1);	247	need (enc, 1);
118	*enc->cur++ = ch;	248	*enc->cur++ = ch;
119	}	249	}
120		250
		251	// used for tags, intregers, element counts and so on
121	static void	252	static void
122	encode_uint (enc_t *enc, int major, UV len)	253	encode_uint (enc_t *enc, int major, UV len)
123	{	254	{
124	need (enc, 9);	255	need (enc, 9);
125		256
126	if (len < 24)	257	if (ecb_expect_true (len < LENGTH_EXT1))
127	*enc->cur++ = major | len;	258	*enc->cur++ = major | len;
128	else if (len <= 0xff)	259	else if (ecb_expect_true (len <= 0xffU))
129	{	260	{
130	*enc->cur++ = major | 24;	261	*enc->cur++ = major | LENGTH_EXT1;
131	*enc->cur++ = len;	262	*enc->cur++ = len;
132	}	263	}
133	else if (len <= 0xffff)	264	else if (len <= 0xffffU)
134	{	265	{
135	*enc->cur++ = major | 25;	266	*enc->cur++ = major | LENGTH_EXT2;
136	*enc->cur++ = len >> 8;	267	*enc->cur++ = len >> 8;
137	*enc->cur++ = len;	268	*enc->cur++ = len;
138	}	269	}
139	else if (len <= 0xffffffff)	270	else if (len <= 0xffffffffU)
140	{	271	{
141	*enc->cur++ = major | 26;	272	*enc->cur++ = major | LENGTH_EXT4;
142	*enc->cur++ = len >> 24;	273	*enc->cur++ = len >> 24;
143	*enc->cur++ = len >> 16;	274	*enc->cur++ = len >> 16;
144	*enc->cur++ = len >> 8;	275	*enc->cur++ = len >> 8;
145	*enc->cur++ = len;	276	*enc->cur++ = len;
146	}	277	}
147	else	278	else
148	{	279	{
149	*enc->cur++ = major | 27;	280	*enc->cur++ = major | LENGTH_EXT8;
150	*enc->cur++ = len >> 56;	281	*enc->cur++ = len >> 56;
151	*enc->cur++ = len >> 48;	282	*enc->cur++ = len >> 48;
152	*enc->cur++ = len >> 40;	283	*enc->cur++ = len >> 40;
153	*enc->cur++ = len >> 32;	284	*enc->cur++ = len >> 32;
154	*enc->cur++ = len >> 24;	285	*enc->cur++ = len >> 24;
…		…
156	*enc->cur++ = len >> 8;	287	*enc->cur++ = len >> 8;
157	*enc->cur++ = len;	288	*enc->cur++ = len;
158	}	289	}
159	}	290	}
160		291
161	static void	292	// encodes a perl value into a CBOR integer
		293	ecb_inline void
		294	encode_int (enc_t *enc, SV *sv)
		295	{
		296	if (SvIsUV (sv))
		297	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
		298	else if (SvIVX (sv) >= 0)
		299	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
		300	else
		301	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
		302	}
		303
		304	ecb_inline void
		305	encode_tag (enc_t *enc, UV tag)
		306	{
		307	encode_uint (enc, MAJOR_TAG, tag);
		308	}
		309
		310	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		311	ecb_noinline static void
162	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	312	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
163	{	313	{
164	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	314	STRLEN ulen = len;
		315	U8 *p, *pend = (U8 *)str + len;
		316
		317	for (p = (U8 *)str; p < pend; ++p)
		318	ulen += *p >> 7; // count set high bits
		319
		320	encode_uint (enc, MAJOR_TEXT, ulen);
		321
		322	need (enc, ulen);
		323	for (p = (U8 *)str; p < pend; ++p)
		324	if (*p < 0x80)
		325	*enc->cur++ = *p;
		326	else
		327	{
		328	*enc->cur++ = 0xc0 + (*p >> 6);
		329	*enc->cur++ = 0x80 + (*p & 63);
		330	}
		331	}
		332
		333	ecb_inline void
		334	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		335	{
		336	if (ecb_expect_false (upgrade_utf8))
		337	if (!utf8)
		338	{
		339	encode_str_utf8 (enc, utf8, str, len);
		340	return;
		341	}
		342
		343	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
165	need (enc, len);	344	need (enc, len);
166	memcpy (enc->cur, str, len);	345	memcpy (enc->cur, str, len);
167	enc->cur += len;	346	enc->cur += len;
168	}	347	}
169		348
		349	ecb_inline void
		350	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		351	{
		352	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		353	{
		354	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		355
		356	if (SvOK (*svp))
		357	{
		358	// already registered, use stringref
		359	encode_tag (enc, CBOR_TAG_STRINGREF);
		360	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		361	return;
		362	}
		363	else if (len >= minimum_string_length (enc->stringref_idx))
		364	{
		365	// register only
		366	sv_setuv (*svp, enc->stringref_idx);
		367	++enc->stringref_idx;
		368	}
		369	}
		370
		371	encode_str (enc, upgrade_utf8, utf8, str, len);
		372	}
		373
		374	ecb_inline void
		375	encode_float16 (enc_t *enc, NV nv)
		376	{
		377	need (enc, 1+2);
		378
		379	*enc->cur++ = MAJOR_MISC | MISC_FLOAT16;
		380
		381	uint16_t fp = ecb_float_to_binary16 (nv);
		382
		383	if (!ecb_big_endian ())
		384	fp = ecb_bswap16 (fp);
		385
		386	memcpy (enc->cur, &fp, 2);
		387	enc->cur += 2;
		388	}
		389
		390	ecb_inline void
		391	encode_float32 (enc_t *enc, NV nv)
		392	{
		393	need (enc, 1+4);
		394
		395	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
		396
		397	uint32_t fp = ecb_float_to_binary32 (nv);
		398
		399	if (!ecb_big_endian ())
		400	fp = ecb_bswap32 (fp);
		401
		402	memcpy (enc->cur, &fp, 4);
		403	enc->cur += 4;
		404	}
		405
		406	ecb_inline void
		407	encode_float64 (enc_t *enc, NV nv)
		408	{
		409	need (enc, 1+8);
		410
		411	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
		412
		413	uint64_t fp = ecb_double_to_binary64 (nv);
		414
		415	if (!ecb_big_endian ())
		416	fp = ecb_bswap64 (fp);
		417
		418	memcpy (enc->cur, &fp, 8);
		419	enc->cur += 8;
		420	}
		421
		422	ecb_inline void
		423	encode_bool (enc_t *enc, int istrue)
		424	{
		425	encode_ch (enc, istrue ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		426	}
		427
		428	ecb_inline void
		429	encode_forced (enc_t *enc, UV type, SV *sv)
		430	{
		431	switch (type)
		432	{
		433	case AS_CBOR:
		434	{
		435	STRLEN len;
		436	char *str = SvPVbyte (sv, len);
		437
		438	need (enc, len);
		439	memcpy (enc->cur, str, len);
		440	enc->cur += len;
		441	}
		442	break;
		443
		444	case AS_BYTES:
		445	{
		446	STRLEN len;
		447	char *str = SvPVbyte (sv, len);
		448	encode_strref (enc, 0, 0, str, len);
		449	}
		450	break;
		451
		452	case AS_TEXT:
		453	{
		454	STRLEN len;
		455	char *str = SvPVutf8 (sv, len);
		456	encode_strref (enc, 1, 1, str, len);
		457	}
		458	break;
		459
		460	case AS_INT: encode_int (enc, sv); break;
		461
		462	case AS_FLOAT16: encode_float16 (enc, SvNV (sv)); break;
		463	case AS_FLOAT32: encode_float32 (enc, SvNV (sv)); break;
		464	case AS_FLOAT64: encode_float64 (enc, SvNV (sv)); break;
		465
		466	default:
		467	croak ("encountered malformed CBOR::XS::Tagged object");
		468	}
		469	}
		470
170	static void encode_sv (enc_t *enc, SV *sv);	471	static void encode_sv (enc_t *enc, SV *sv);
171		472
172	static void	473	static void
173	encode_av (enc_t *enc, AV *av)	474	encode_av (enc_t *enc, AV *av)
174	{	475	{
…		…
177	if (enc->depth >= enc->cbor.max_depth)	478	if (enc->depth >= enc->cbor.max_depth)
178	croak (ERR_NESTING_EXCEEDED);	479	croak (ERR_NESTING_EXCEEDED);
179		480
180	++enc->depth;	481	++enc->depth;
181		482
182	encode_uint (enc, 0x80, len + 1);	483	encode_uint (enc, MAJOR_ARRAY, len + 1);
183		484
		485	if (ecb_expect_false (SvMAGICAL (av)))
184	for (i = 0; i <= len; ++i)	486	for (i = 0; i <= len; ++i)
185	{	487	{
186	SV **svp = av_fetch (av, i, 0);	488	SV **svp = av_fetch (av, i, 0);
187	encode_sv (enc, svp ? *svp : &PL_sv_undef);	489	encode_sv (enc, svp ? *svp : &PL_sv_undef);
188	}	490	}
		491	else
		492	for (i = 0; i <= len; ++i)
		493	{
		494	SV *sv = AvARRAY (av)[i];
		495	encode_sv (enc, sv ? sv : &PL_sv_undef);
		496	}
189		497
190	--enc->depth;	498	--enc->depth;
191	}	499	}
192		500
193	static void	501	static void
…		…
201	++enc->depth;	509	++enc->depth;
202		510
203	int pairs = hv_iterinit (hv);	511	int pairs = hv_iterinit (hv);
204	int mg = SvMAGICAL (hv);	512	int mg = SvMAGICAL (hv);
205		513
206	if (mg)	514	if (ecb_expect_false (mg))
207	encode_ch (enc, 0xa0 | 31);	515	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
208	else	516	else
209	encode_uint (enc, 0xa0, pairs);	517	encode_uint (enc, MAJOR_MAP, pairs);
210		518
211	while ((he = hv_iternext (hv)))	519	while ((he = hv_iternext (hv)))
212	{	520	{
213	if (HeKLEN (he) == HEf_SVKEY)	521	if (HeKLEN (he) == HEf_SVKEY)
214	encode_sv (enc, HeSVKEY (he));	522	encode_sv (enc, HeSVKEY (he));
215	else	523	else
216	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	524	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
217		525
218	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	526	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
219	}	527	}
220		528
221	if (mg)	529	if (ecb_expect_false (mg))
222	encode_ch (enc, 0xe0 | 31);	530	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
223		531
224	--enc->depth;	532	--enc->depth;
225	}	533	}
226		534
227	// encode objects, arrays and special \0=false and \1=true values.	535	// encode objects, arrays and special \0=false and \1=true values.
228	static void	536	static void
229	encode_rv (enc_t *enc, SV *sv)	537	encode_rv (enc_t *enc, SV *sv)
230	{	538	{
231	svtype svt;
232
233	SvGETMAGIC (sv);	539	SvGETMAGIC (sv);
		540
234	svt = SvTYPE (sv);	541	svtype svt = SvTYPE (sv);
235		542
236	if (ecb_expect_false (SvOBJECT (sv)))	543	if (ecb_expect_false (SvOBJECT (sv)))
237	{	544	{
238	HV *stash = !CBOR_SLOW || cbor_boolean_stash	545	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
239	? cbor_boolean_stash	546	? types_boolean_stash
		547	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		548	HV *error_stash = !CBOR_SLOW || types_error_stash
		549	? types_error_stash
		550	: gv_stashpv ("Types::Serialiser::Error", 1);
		551	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		552	? cbor_tagged_stash
240	: gv_stashpv ("CBOR::XS::Boolean", 1);	553	: gv_stashpv ("CBOR::XS::Tagged" , 1);
241		554
242	if (SvSTASH (sv) == stash)	555	HV *stash = SvSTASH (sv);
243	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	556
		557	if (stash == boolean_stash)
		558	{
		559	encode_bool (enc, SvIV (sv));
		560	return;
		561	}
		562	else if (stash == error_stash)
		563	{
		564	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		565	return;
		566	}
		567	else if (stash == tagged_stash)
		568	{
		569	if (svt != SVt_PVAV)
		570	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		571
		572	switch (av_len ((AV *)sv))
		573	{
		574	case 2-1:
		575	// actually a tagged value
		576	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
		577	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		578	break;
		579
		580	case 3-1:
		581	// a forced type [value, type, undef]
		582	encode_forced (enc, SvUV (*av_fetch ((AV *)sv, 1, 1)), *av_fetch ((AV *)sv, 0, 1));
		583	break;
		584
		585	default:
		586	croak ("encountered malformed CBOR::XS::Tagged object");
		587	}
		588
		589	return;
		590	}
		591	}
		592
		593	if (ecb_expect_false (SvREFCNT (sv) > 1)
		594	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		595	{
		596	if (ecb_expect_false (!enc->shareable))
		597	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		598
		599	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		600
		601	if (SvOK (*svp))
		602	{
		603	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		604	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		605	return;
		606	}
244	else	607	else
245	{	608	{
246	#if 0 //TODO	609	sv_setuv (*svp, enc->shareable_idx);
247	if (enc->cbor.flags & F_CONV_BLESSED)	610	++enc->shareable_idx;
		611	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		612	}
		613	}
		614
		615	if (ecb_expect_false (SvOBJECT (sv)))
		616	{
		617	HV *stash = SvSTASH (sv);
		618	GV *method;
		619
		620	if (enc->cbor.flags & F_FORBID_OBJECTS)
		621	croak ("encountered object '%s', but forbid_objects is enabled",
		622	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		623	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
248	{	624	{
		625	dSP;
		626
		627	ENTER; SAVETMPS;
		628	PUSHMARK (SP);
249	// we re-bless the reference to get overload and other niceties right	629	// we re-bless the reference to get overload and other niceties right
250	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
251
252	if (to_cbor)
253	{
254	dSP;
255
256	ENTER; SAVETMPS; PUSHMARK (SP);
257	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	630	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
258		631
259	// calling with G_SCALAR ensures that we always get a 1 return value
260	PUTBACK;	632	PUTBACK;
		633	// G_SCALAR ensures that return value is 1
261	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	634	call_sv ((SV *)GvCV (method), G_SCALAR);
262	SPAGAIN;	635	SPAGAIN;
263		636
264	// catch this surprisingly common error	637	// catch this surprisingly common error
265	if (SvROK (TOPs) && SvRV (TOPs) == sv)	638	if (SvROK (TOPs) && SvRV (TOPs) == sv)
266	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	639	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
267		640
268	sv = POPs;
269	PUTBACK;
270
271	encode_sv (enc, sv);	641	encode_sv (enc, POPs);
272		642
		643	PUTBACK;
		644
273	FREETMPS; LEAVE;	645	FREETMPS; LEAVE;
274	}	646	}
275	else if (enc->cbor.flags & F_ALLOW_BLESSED)	647	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
276	encode_str (enc, "null", 4, 0);	648	{
277	else	649	dSP;
278	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it",	650
279	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	651	ENTER; SAVETMPS;
		652	PUSHMARK (SP);
		653	EXTEND (SP, 2);
		654	// we re-bless the reference to get overload and other niceties right
		655	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		656	PUSHs (sv_cbor);
		657
		658	PUTBACK;
		659	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		660	SPAGAIN;
		661
		662	// catch this surprisingly common error
		663	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		664	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		665
		666	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		667	encode_uint (enc, MAJOR_ARRAY, count + 1);
		668	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		669
		670	{
		671	int i;
		672
		673	for (i = 0; i < count; ++i)
		674	encode_sv (enc, SP[i + 1 - count]);
		675
		676	SP -= count;
280	}	677	}
281	else if (enc->cbor.flags & F_ALLOW_BLESSED)	678
282	encode_str (enc, "null", 4, 0);	679	PUTBACK;
		680
		681	FREETMPS; LEAVE;
		682	}
283	else	683	else
284	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	684	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
285	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	685	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
286	#endif
287	}
288	}	686	}
289	else if (svt == SVt_PVHV)	687	else if (svt == SVt_PVHV)
290	encode_hv (enc, (HV *)sv);	688	encode_hv (enc, (HV *)sv);
291	else if (svt == SVt_PVAV)	689	else if (svt == SVt_PVAV)
292	encode_av (enc, (AV *)sv);	690	encode_av (enc, (AV *)sv);
293	else if (svt < SVt_PVAV)
294	{
295	STRLEN len = 0;
296	char *pv = svt ? SvPV (sv, len) : 0;
297
298	if (len == 1 && *pv == '1')
299	encode_ch (enc, 0xe0 | 21);
300	else if (len == 1 && *pv == '0')
301	encode_ch (enc, 0xe0 | 20);
302	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
303	encode_ch (enc, 0xe0 | 23);
304	else
305	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
306	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
307	}
308	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
309	encode_ch (enc, 0xe0 | 23);
310	else	691	else
311	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	692	{
312	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	693	encode_tag (enc, CBOR_TAG_INDIRECTION);
		694	encode_sv (enc, sv);
		695	}
313	}	696	}
314		697
315	static void	698	static void
316	encode_nv (enc_t *enc, SV *sv)	699	encode_nv (enc_t *enc, SV *sv)
317	{	700	{
318	double nv = SvNVX (sv);	701	double nv = SvNVX (sv);
319		702
320	need (enc, 9);	703	need (enc, 9);
321		704
322	if (ecb_expect_false (nv == (U32)nv))	705	if (ecb_expect_false (nv == (NV)(U32)nv))
323	encode_uint (enc, 0x00, (U32)nv);	706	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
324	//TODO: maybe I32?	707	//TODO: maybe I32?
325	else if (ecb_expect_false (nv == (float)nv))	708	else if (ecb_expect_false (nv == (float)nv))
326	{	709	encode_float32 (enc, nv);
327	uint32_t fp = ecb_float_to_binary32 (nv);
328
329	*enc->cur++ = 0xe0 | 26;
330
331	if (!ecb_big_endian ())
332	fp = ecb_bswap32 (fp);
333
334	memcpy (enc->cur, &fp, 4);
335	enc->cur += 4;
336	}
337	else	710	else
338	{	711	encode_float64 (enc, nv);
339	uint64_t fp = ecb_double_to_binary64 (nv);
340
341	*enc->cur++ = 0xe0 | 27;
342
343	if (!ecb_big_endian ())
344	fp = ecb_bswap64 (fp);
345
346	memcpy (enc->cur, &fp, 8);
347	enc->cur += 8;
348	}
349	}	712	}
350		713
351	static void	714	static void
352	encode_sv (enc_t *enc, SV *sv)	715	encode_sv (enc_t *enc, SV *sv)
353	{	716	{
…		…
355		718
356	if (SvPOKp (sv))	719	if (SvPOKp (sv))
357	{	720	{
358	STRLEN len;	721	STRLEN len;
359	char *str = SvPV (sv, len);	722	char *str = SvPV (sv, len);
360	encode_str (enc, SvUTF8 (sv), str, len);	723	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
361	}	724	}
362	else if (SvNOKp (sv))	725	else if (SvNOKp (sv))
363	encode_nv (enc, sv);	726	encode_nv (enc, sv);
364	else if (SvIOKp (sv))	727	else if (SvIOKp (sv))
365	{	728	encode_int (enc, sv);
366	if (SvIsUV (sv))
367	encode_uint (enc, 0x00, SvUVX (sv));
368	else if (SvIVX (sv) >= 0)
369	encode_uint (enc, 0x00, SvIVX (sv));
370	else
371	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
372	}
373	else if (SvROK (sv))	729	else if (SvROK (sv))
374	encode_rv (enc, SvRV (sv));	730	encode_rv (enc, SvRV (sv));
375	else if (!SvOK (sv))	731	else if (!SvOK (sv))
376	encode_ch (enc, 0xe0 | 22);	732	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
377	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	733	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
378	encode_ch (enc, 0xe0 | 23);	734	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
379	else	735	else
380	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	736	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
381	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	737	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
382	}	738	}
383		739
384	static SV *	740	static SV *
385	encode_cbor (SV *scalar, CBOR *cbor)	741	encode_cbor (SV *scalar, CBOR *cbor)
386	{	742	{
387	enc_t enc;	743	enc_t enc = { 0 };
388		744
389	enc.cbor = *cbor;	745	enc.cbor = *cbor;
390	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	746	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
391	enc.cur = SvPVX (enc.sv);	747	enc.cur = SvPVX (enc.sv);
392	enc.end = SvEND (enc.sv);	748	enc.end = SvEND (enc.sv);
393	enc.depth = 0;
394		749
395	SvPOK_only (enc.sv);	750	SvPOK_only (enc.sv);
		751
		752	if (cbor->flags & F_PACK_STRINGS)
		753	{
		754	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		755	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		756	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		757	}
		758
396	encode_sv (&enc, scalar);	759	encode_sv (&enc, scalar);
397		760
398	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	761	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
399	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	762	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
400		763
…		…
414	U8 *end; // end of input string	777	U8 *end; // end of input string
415	const char *err; // parse error, if != 0	778	const char *err; // parse error, if != 0
416	CBOR cbor;	779	CBOR cbor;
417	U32 depth; // recursion depth	780	U32 depth; // recursion depth
418	U32 maxdepth; // recursion depth limit	781	U32 maxdepth; // recursion depth limit
		782	AV *shareable;
		783	AV *stringref;
		784	SV *decode_tagged;
		785	SV *err_sv; // optional sv for error, needs to be freed
419	} dec_t;	786	} dec_t;
420		787
421	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	788	// set dec->err to ERRSV
		789	ecb_cold static void
		790	err_errsv (dec_t *dec)
		791	{
		792	if (!dec->err)
		793	{
		794	dec->err_sv = newSVsv (ERRSV);
422		795
423	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	796	// chop off the trailing \n
		797	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		798	*SvEND (dec->err_sv) = 0;
424		799
		800	dec->err = SvPVutf8_nolen (dec->err_sv);
		801	}
		802	}
		803
		804	// the following functions are used to reduce code size and help the compiler to optimise
		805	ecb_cold static void
		806	err_set (dec_t *dec, const char *reason)
		807	{
		808	if (!dec->err)
		809	dec->err = reason;
		810	}
		811
		812	ecb_cold static void
		813	err_unexpected_end (dec_t *dec)
		814	{
		815	err_set (dec, "unexpected end of CBOR data");
		816	}
		817
		818	#define ERR_DO(do) SB do; goto fail; SE
		819	#define ERR(reason) ERR_DO (err_set (dec, reason))
		820	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		821
		822	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		823
425	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	824	#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED)
426	#define DEC_DEC_DEPTH --dec->depth	825	#define DEC_DEC_DEPTH --dec->depth
427		826
428	static UV	827	static UV
429	decode_uint (dec_t *dec)	828	decode_uint (dec_t *dec)
430	{	829	{
431	switch (*dec->cur & 31)	830	U8 m = *dec->cur & MINOR_MASK;
432	{	831	++dec->cur;
433	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
434	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
435	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
436	return *dec->cur++ & 31;
437		832
438	case 24:	833	if (ecb_expect_true (m < LENGTH_EXT1))
		834	return m;
		835	else if (ecb_expect_true (m == LENGTH_EXT1))
		836	{
439	WANT (2);	837	WANT (1);
440	dec->cur += 2;	838	dec->cur += 1;
441	return dec->cur[-1];	839	return dec->cur[-1];
442		840	}
443	case 25:	841	else if (ecb_expect_true (m == LENGTH_EXT2))
		842	{
444	WANT (3);	843	WANT (2);
445	dec->cur += 3;	844	dec->cur += 2;
446	return (((UV)dec->cur[-2]) << 8)	845	return (((UV)dec->cur[-2]) << 8)
447	| ((UV)dec->cur[-1]);	846	| ((UV)dec->cur[-1]);
448		847	}
449	case 26:	848	else if (ecb_expect_true (m == LENGTH_EXT4))
		849	{
450	WANT (5);	850	WANT (4);
451	dec->cur += 5;	851	dec->cur += 4;
452	return (((UV)dec->cur[-4]) << 24)	852	return (((UV)dec->cur[-4]) << 24)
453	| (((UV)dec->cur[-3]) << 16)	853	| (((UV)dec->cur[-3]) << 16)
454	| (((UV)dec->cur[-2]) << 8)	854	| (((UV)dec->cur[-2]) << 8)
455	| ((UV)dec->cur[-1]);	855	| ((UV)dec->cur[-1]);
456		856	}
457	case 27:	857	else if (ecb_expect_true (m == LENGTH_EXT8))
		858	{
458	WANT (9);	859	WANT (8);
459	dec->cur += 9;	860	dec->cur += 8;
		861
		862	return
		863	#if UVSIZE < 8
		864	0
		865	#else
460	return (((UV)dec->cur[-8]) << 56)	866	(((UV)dec->cur[-8]) << 56)
461	| (((UV)dec->cur[-7]) << 48)	867	| (((UV)dec->cur[-7]) << 48)
462	| (((UV)dec->cur[-6]) << 40)	868	| (((UV)dec->cur[-6]) << 40)
463	| (((UV)dec->cur[-5]) << 32)	869	| (((UV)dec->cur[-5]) << 32)
		870	#endif
464	| (((UV)dec->cur[-4]) << 24)	871	| (((UV)dec->cur[-4]) << 24)
465	| (((UV)dec->cur[-3]) << 16)	872	| (((UV)dec->cur[-3]) << 16)
466	| (((UV)dec->cur[-2]) << 8)	873	| (((UV)dec->cur[-2]) << 8)
467	| ((UV)dec->cur[-1]);	874	| ((UV)dec->cur[-1]);
468		875	}
469	default:	876	else
470	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	877	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
471	}
472		878
473	fail:	879	fail:
474	return 0;	880	return 0;
475	}	881	}
476		882
…		…
481	{	887	{
482	AV *av = newAV ();	888	AV *av = newAV ();
483		889
484	DEC_INC_DEPTH;	890	DEC_INC_DEPTH;
485		891
486	if ((*dec->cur & 31) == 31)	892	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
487	{	893	{
488	++dec->cur;	894	++dec->cur;
489		895
490	for (;;)	896	for (;;)
491	{	897	{
492	WANT (1);	898	WANT (1);
493		899
494	if (*dec->cur == (0xe0 | 31))	900	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
495	{	901	{
496	++dec->cur;	902	++dec->cur;
497	break;	903	break;
498	}	904	}
499		905
500	av_push (av, decode_sv (dec));	906	av_push (av, decode_sv (dec));
501	}	907	}
502	}	908	}
503	else	909	else
504	{	910	{
505	int i, len = decode_uint (dec);	911	UV i, len = decode_uint (dec);
506		912
		913	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
507	av_fill (av, len - 1);	914	av_fill (av, len - 1);
508		915
509	for (i = 0; i < len; ++i)	916	for (i = 0; i < len; ++i)
510	AvARRAY (av)[i] = decode_sv (dec);	917	AvARRAY (av)[i] = decode_sv (dec);
511	}	918	}
512		919
513	DEC_DEC_DEPTH;	920	DEC_DEC_DEPTH;
514	return newRV_noinc ((SV *)av);	921	return newRV_noinc ((SV *)av);
515		922
516	fail:	923	fail:
517	SvREFCNT_dec (av);	924	SvREFCNT_dec_NN (av);
518	DEC_DEC_DEPTH;	925	DEC_DEC_DEPTH;
519	return &PL_sv_undef;	926	return &PL_sv_undef;
520	}	927	}
521		928
		929	static void
		930	decode_he (dec_t *dec, HV *hv)
		931	{
		932	// for speed reasons, we specialcase single-string
		933	// byte or utf-8 strings as keys, but only when !stringref
		934
		935	if (ecb_expect_true (!dec->stringref))
		936	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		937	{
		938	STRLEN len = decode_uint (dec);
		939	char *key = (char *)dec->cur;
		940
		941	WANT (len);
		942	dec->cur += len;
		943
		944	hv_store (hv, key, len, decode_sv (dec), 0);
		945
		946	return;
		947	}
		948	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		949	{
		950	STRLEN len = decode_uint (dec);
		951	char *key = (char *)dec->cur;
		952
		953	WANT (len);
		954	dec->cur += len;
		955
		956	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		957	if (!is_utf8_string (key, len))
		958	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		959
		960	hv_store (hv, key, -len, decode_sv (dec), 0);
		961
		962	return;
		963	}
		964
		965	SV *k = decode_sv (dec);
		966	SV *v = decode_sv (dec);
		967
		968	// we leak memory if uncaught exceptions are thrown by random magical
		969	// methods, and this is hopefully the only place where it can happen,
		970	// so if there is a chance of an exception, take the very slow path.
		971	// since catching exceptions is "undocumented/internal/forbidden" by
		972	// the new p5p powers, we need to call out to a perl function :/
		973	if (ecb_expect_false (SvAMAGIC (k)))
		974	{
		975	dSP;
		976
		977	ENTER; SAVETMPS;
		978	PUSHMARK (SP);
		979	EXTEND (SP, 3);
		980	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		981	PUSHs (sv_2mortal (k));
		982	PUSHs (sv_2mortal (v));
		983
		984	PUTBACK;
		985	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		986	SPAGAIN;
		987
		988	FREETMPS; LEAVE;
		989
		990	if (SvTRUE (ERRSV))
		991	ERR_ERRSV;
		992
		993	return;
		994	}
		995
		996	hv_store_ent (hv, k, v, 0);
		997	SvREFCNT_dec_NN (k);
		998
		999	fail:
		1000	;
		1001	}
		1002
522	static SV *	1003	static SV *
523	decode_hv (dec_t *dec)	1004	decode_hv (dec_t *dec)
524	{	1005	{
525	HV *hv = newHV ();	1006	HV *hv = newHV ();
526		1007
527	DEC_INC_DEPTH;	1008	DEC_INC_DEPTH;
528		1009
529	if ((*dec->cur & 31) == 31)	1010	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
530	{	1011	{
531	++dec->cur;	1012	++dec->cur;
532		1013
533	for (;;)	1014	for (;;)
534	{	1015	{
535	WANT (1);	1016	WANT (1);
536		1017
537	if (*dec->cur == (0xe0 | 31))	1018	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
538	{	1019	{
539	++dec->cur;	1020	++dec->cur;
540	break;	1021	break;
541	}	1022	}
542		1023
543	SV *k = decode_sv (dec);	1024	decode_he (dec, hv);
544	SV *v = decode_sv (dec);
545
546	hv_store_ent (hv, k, v, 0);
547	}	1025	}
548	}	1026	}
549	else	1027	else
550	{	1028	{
551	int len = decode_uint (dec);	1029	UV pairs = decode_uint (dec);
552		1030
		1031	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1032
553	while (len--)	1033	while (pairs--)
554	{	1034	decode_he (dec, hv);
555	SV *k = decode_sv (dec);
556	SV *v = decode_sv (dec);
557
558	hv_store_ent (hv, k, v, 0);
559	}
560	}	1035	}
561		1036
562	DEC_DEC_DEPTH;	1037	DEC_DEC_DEPTH;
563	return newRV_noinc ((SV *)hv);	1038	return newRV_noinc ((SV *)hv);
564		1039
565	#if 0	1040	fail:
566	SV *sv;	1041	SvREFCNT_dec_NN (hv);
567	HV *hv = newHV ();
568
569	DEC_INC_DEPTH;	1042	DEC_DEC_DEPTH;
570	decode_ws (dec);	1043	return &PL_sv_undef;
		1044	}
571		1045
572	for (;;)	1046	static SV *
573	{	1047	decode_str (dec_t *dec, int utf8)
574	// heuristic: assume that	1048	{
575	// a) decode_str + hv_store_ent are abysmally slow.	1049	SV *sv = 0;
576	// b) most hash keys are short, simple ascii text.	1050
577	// => try to "fast-match" such strings to avoid	1051	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
578	// the overhead of decode_str + hv_store_ent.
579	{	1052	{
580	SV *value;	1053	// indefinite length strings
581	char *p = dec->cur;	1054	++dec->cur;
582	char *e = p + 24; // only try up to 24 bytes
583		1055
		1056	U8 major = *dec->cur & MAJOR_MISC;
		1057
		1058	sv = newSVpvn ("", 0);
		1059
584	for (;;)	1060	for (;;)
585	{	1061	{
586	// the >= 0x80 is false on most architectures	1062	WANT (1);
587	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')	1063
		1064	if ((*dec->cur - major) > LENGTH_EXT8)
		1065	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
588	{	1066	{
589	// slow path, back up and use decode_str	1067	++dec->cur;
590	SV *key = decode_str (dec);
591	if (!key)
592	goto fail;
593
594	decode_ws (dec); EXPECT_CH (':');
595
596	decode_ws (dec);
597	value = decode_sv (dec);
598	if (!value)
599	{
600	SvREFCNT_dec (key);
601	goto fail;
602	}
603
604	hv_store_ent (hv, key, value, 0);
605	SvREFCNT_dec (key);
606
607	break;	1068	break;
608	}	1069	}
609	else if (*p == '"')
610	{
611	// fast path, got a simple key
612	char *key = dec->cur;
613	int len = p - key;
614	dec->cur = p + 1;
615
616	decode_ws (dec); EXPECT_CH (':');
617
618	decode_ws (dec);
619	value = decode_sv (dec);
620	if (!value)
621	goto fail;
622
623	hv_store (hv, key, len, value, 0);
624
625	break;
626	}
627
628	++p;
629	}
630	}
631
632	decode_ws (dec);
633
634	if (*dec->cur == '}')
635	{
636	++dec->cur;
637	break;
638	}
639
640	if (*dec->cur != ',')
641	ERR (", or } expected while parsing object/hash");
642
643	++dec->cur;
644
645	decode_ws (dec);
646
647	if (*dec->cur == '}' && dec->cbor.flags & F_RELAXED)
648	{
649	++dec->cur;
650	break;
651	}
652	}
653
654	DEC_DEC_DEPTH;
655	sv = newRV_noinc ((SV *)hv);
656
657	// check filter callbacks
658	if (dec->cbor.flags & F_HOOK)
659	{
660	if (dec->cbor.cb_sk_object && HvKEYS (hv) == 1)
661	{
662	HE *cb, *he;
663
664	hv_iterinit (hv);
665	he = hv_iternext (hv);
666	hv_iterinit (hv);
667
668	// the next line creates a mortal sv each time its called.
669	// might want to optimise this for common cases.
670	cb = hv_fetch_ent (dec->cbor.cb_sk_object, hv_iterkeysv (he), 0, 0);
671
672	if (cb)
673	{	1070	else
674	dSP;	1071	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
675	int count;
676		1072
677	ENTER; SAVETMPS; PUSHMARK (SP);	1073	STRLEN len = decode_uint (dec);
678	XPUSHs (HeVAL (he));
679	sv_2mortal (sv);
680		1074
681	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
682
683	if (count == 1)
684	{
685	sv = newSVsv (POPs);
686	FREETMPS; LEAVE;
687	return sv;
688	}
689
690	SvREFCNT_inc (sv);
691	FREETMPS; LEAVE;
692	}
693	}
694
695	if (dec->cbor.cb_object)
696	{
697	dSP;
698	int count;
699
700	ENTER; SAVETMPS; PUSHMARK (SP);
701	XPUSHs (sv_2mortal (sv));
702
703	PUTBACK; count = call_sv (dec->cbor.cb_object, G_ARRAY); SPAGAIN;
704
705	if (count == 1)
706	{
707	sv = newSVsv (POPs);
708	FREETMPS; LEAVE;
709	return sv;
710	}
711
712	SvREFCNT_inc (sv);
713	FREETMPS; LEAVE;
714	}
715	}
716
717	return sv;
718	#endif
719
720	fail:
721	SvREFCNT_dec (hv);
722	DEC_DEC_DEPTH;
723	return &PL_sv_undef;
724	}
725
726	static SV *
727	decode_str (dec_t *dec, int utf8)
728	{
729	SV *sv;
730
731	if ((*dec->cur & 31) == 31)
732	{
733	++dec->cur;
734
735	sv = newSVpvn ("", 0);
736
737	// not very fast, and certainly not robust against illegal input
738	for (;;)
739	{
740	WANT (1);	1075	WANT (len);
741		1076	sv_catpvn (sv, dec->cur, len);
742	if (*dec->cur == (0xe0 | 31))	1077	dec->cur += len;
743	{
744	++dec->cur;
745	break;
746	}
747
748	SV *sv2 = decode_sv (dec);
749	sv_catsv (sv, sv2);
750	}	1078	}
751	}	1079	}
752	else	1080	else
753	{	1081	{
754	STRLEN len = decode_uint (dec);	1082	STRLEN len = decode_uint (dec);
755		1083
756	WANT (len);	1084	WANT (len);
757	sv = newSVpvn (dec->cur, len);	1085	sv = newSVpvn (dec->cur, len);
758	dec->cur += len;	1086	dec->cur += len;
		1087
		1088	if (ecb_expect_false (dec->stringref)
		1089	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		1090	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
759	}	1091	}
760		1092
761	if (utf8)	1093	if (utf8)
		1094	{
		1095	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		1096	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		1097	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		1098
762	SvUTF8_on (sv);	1099	SvUTF8_on (sv);
		1100	}
763		1101
764	return sv;	1102	return sv;
765		1103
766	fail:	1104	fail:
		1105	SvREFCNT_dec (sv);
767	return &PL_sv_undef;	1106	return &PL_sv_undef;
768	}	1107	}
769		1108
770	static SV *	1109	static SV *
771	decode_tagged (dec_t *dec)	1110	decode_tagged (dec_t *dec)
772	{	1111	{
		1112	SV *sv = 0;
773	UV tag = decode_uint (dec);	1113	UV tag = decode_uint (dec);
		1114
		1115	WANT (1);
		1116
		1117	switch (tag)
		1118	{
		1119	case CBOR_TAG_MAGIC:
774	SV *sv = decode_sv (dec);	1120	sv = decode_sv (dec);
		1121	break;
775		1122
776	if (tag == 55799) // 2.4.5 Self-Describe CBOR	1123	case CBOR_TAG_INDIRECTION:
		1124	sv = newRV_noinc (decode_sv (dec));
		1125	break;
		1126
		1127	case CBOR_TAG_STRINGREF_NAMESPACE:
		1128	{
		1129	// do not use SAVETMPS/FREETMPS, as these will
		1130	// erase mortalised caches, e.g. "shareable"
		1131	ENTER;
		1132
		1133	SAVESPTR (dec->stringref);
		1134	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1135
		1136	sv = decode_sv (dec);
		1137
		1138	LEAVE;
		1139	}
		1140	break;
		1141
		1142	case CBOR_TAG_STRINGREF:
		1143	{
		1144	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1145	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1146
		1147	UV idx = decode_uint (dec);
		1148
		1149	if (!dec->stringref || idx >= (UV)(1 + AvFILLp (dec->stringref)))
		1150	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1151
		1152	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1153	}
		1154	break;
		1155
		1156	case CBOR_TAG_VALUE_SHAREABLE:
		1157	{
		1158	if (ecb_expect_false (!dec->shareable))
		1159	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1160
		1161	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1162	{
		1163	sv = newSV (0);
		1164	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1165
		1166	SV *osv = decode_sv (dec);
		1167	sv_setsv (sv, osv);
		1168	SvREFCNT_dec_NN (osv);
		1169	}
		1170	else
		1171	{
		1172	av_push (dec->shareable, &PL_sv_undef);
		1173	int idx = AvFILLp (dec->shareable);
		1174	sv = decode_sv (dec);
		1175	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1176	}
		1177	}
		1178	break;
		1179
		1180	case CBOR_TAG_VALUE_SHAREDREF:
		1181	{
		1182	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1183	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1184
		1185	UV idx = decode_uint (dec);
		1186
		1187	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
		1188	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1189
		1190	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1191
		1192	if (sv == &PL_sv_undef)
		1193	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1194	}
		1195	break;
		1196
		1197	case CBOR_TAG_PERL_OBJECT:
		1198	{
		1199	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1200	goto filter;
		1201
		1202	sv = decode_sv (dec);
		1203
		1204	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1205	ERR ("corrupted CBOR data (non-array perl object)");
		1206
		1207	AV *av = (AV *)SvRV (sv);
		1208	int len = av_len (av) + 1;
		1209	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1210
		1211	if (!stash)
		1212	ERR ("cannot decode perl-object (package does not exist)");
		1213
		1214	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1215
		1216	if (!method)
		1217	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1218
		1219	dSP;
		1220
		1221	ENTER; SAVETMPS;
		1222	PUSHMARK (SP);
		1223	EXTEND (SP, len + 1);
		1224	// we re-bless the reference to get overload and other niceties right
		1225	PUSHs (*av_fetch (av, 0, 1));
		1226	PUSHs (sv_cbor);
		1227
		1228	int i;
		1229
		1230	for (i = 1; i < len; ++i)
		1231	PUSHs (*av_fetch (av, i, 1));
		1232
		1233	PUTBACK;
		1234	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1235	SPAGAIN;
		1236
		1237	if (SvTRUE (ERRSV))
		1238	{
		1239	FREETMPS; LEAVE;
		1240	ERR_ERRSV;
		1241	}
		1242
		1243	SvREFCNT_dec_NN (sv);
		1244	sv = SvREFCNT_inc (POPs);
		1245
		1246	PUTBACK;
		1247
		1248	FREETMPS; LEAVE;
		1249	}
		1250	break;
		1251
		1252	default:
		1253	filter:
		1254	{
		1255	SV *tag_sv = newSVuv (tag);
		1256
		1257	sv = decode_sv (dec);
		1258
		1259	dSP;
		1260	ENTER; SAVETMPS;
		1261	PUSHMARK (SP);
		1262	EXTEND (SP, 2);
		1263	PUSHs (tag_sv);
		1264	PUSHs (sv);
		1265
		1266	PUTBACK;
		1267	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1268	SPAGAIN;
		1269
		1270	if (SvTRUE (ERRSV))
		1271	{
		1272	SvREFCNT_dec_NN (tag_sv);
		1273	FREETMPS; LEAVE;
		1274	ERR_ERRSV;
		1275	}
		1276
		1277	if (count)
		1278	{
		1279	SvREFCNT_dec_NN (tag_sv);
		1280	SvREFCNT_dec_NN (sv);
		1281	sv = SvREFCNT_inc_NN (TOPs);
		1282	SP -= count;
		1283	}
		1284	else
		1285	{
		1286	AV *av = newAV ();
		1287	av_push (av, tag_sv);
		1288	av_push (av, sv);
		1289
		1290	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1291	? cbor_tagged_stash
		1292	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1293	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1294	}
		1295
		1296	PUTBACK;
		1297
		1298	FREETMPS; LEAVE;
		1299	}
		1300	break;
		1301	}
		1302
777	return sv;	1303	return sv;
778		1304
779	AV *av = newAV ();	1305	fail:
780	av_push (av, newSVuv (tag));	1306	SvREFCNT_dec (sv);
781	av_push (av, sv);	1307	return &PL_sv_undef;
782	return newRV_noinc ((SV *)av);
783	}	1308	}
784		1309
785	static SV *	1310	static SV *
786	decode_sv (dec_t *dec)	1311	decode_sv (dec_t *dec)
787	{	1312	{
788	WANT (1);	1313	WANT (1);
789		1314
790	switch (*dec->cur >> 5)	1315	switch (*dec->cur >> MAJOR_SHIFT)
791	{	1316	{
792	case 0: // unsigned int	1317	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
793	//TODO: 64 bit values on 3 2bit perls	1318	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
794	return newSVuv (decode_uint (dec));	1319	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
795	case 1: // negative int	1320	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
796	return newSViv (-1 - (IV)decode_uint (dec));	1321	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
797	case 2: // octet string	1322	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
798	return decode_str (dec, 0);	1323	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
799	case 3: // utf-8 string	1324
800	return decode_str (dec, 1);	1325	case MAJOR_MISC >> MAJOR_SHIFT:
801	case 4: // array
802	return decode_av (dec);
803	case 5: // map
804	return decode_hv (dec);
805	case 6: // tag
806	return decode_tagged (dec);
807	case 7: // misc
808	switch (*dec->cur++ & 31)	1326	switch (*dec->cur++ & MINOR_MASK)
809	{	1327	{
810	case 20:	1328	case SIMPLE_FALSE:
811	#if CBOR_SLOW	1329	#if CBOR_SLOW
812	cbor_false = get_bool ("CBOR::XS::false");	1330	types_false = get_bool ("Types::Serialiser::false");
813	#endif	1331	#endif
814	return newSVsv (cbor_false);	1332	return newSVsv (types_false);
815	case 21:	1333	case SIMPLE_TRUE:
816	#if CBOR_SLOW	1334	#if CBOR_SLOW
817	cbor_true = get_bool ("CBOR::XS::true");	1335	types_true = get_bool ("Types::Serialiser::true");
818	#endif	1336	#endif
819	return newSVsv (cbor_true);	1337	return newSVsv (types_true);
820	case 22:	1338	case SIMPLE_NULL:
821	return newSVsv (&PL_sv_undef);	1339	return newSVsv (&PL_sv_undef);
		1340	case SIMPLE_UNDEF:
		1341	#if CBOR_SLOW
		1342	types_error = get_bool ("Types::Serialiser::error");
		1343	#endif
		1344	return newSVsv (types_error);
822		1345
823	case 25:	1346	case MISC_FLOAT16:
824	{	1347	{
825	WANT (2);	1348	WANT (2);
826		1349
827	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1350	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
828	dec->cur += 2;	1351	dec->cur += 2;
829		1352
830	return newSVnv (ecb_binary16_to_float (fp));	1353	return newSVnv (ecb_binary16_to_float (fp));
831	}	1354	}
832		1355
833	case 26:	1356	case MISC_FLOAT32:
834	{	1357	{
835	uint32_t fp;	1358	uint32_t fp;
836	WANT (4);	1359	WANT (4);
837	memcpy (&fp, dec->cur, 4);	1360	memcpy (&fp, dec->cur, 4);
838	dec->cur += 4;	1361	dec->cur += 4;
…		…
841	fp = ecb_bswap32 (fp);	1364	fp = ecb_bswap32 (fp);
842		1365
843	return newSVnv (ecb_binary32_to_float (fp));	1366	return newSVnv (ecb_binary32_to_float (fp));
844	}	1367	}
845		1368
846	case 27:	1369	case MISC_FLOAT64:
847	{	1370	{
848	uint64_t fp;	1371	uint64_t fp;
849	WANT (8);	1372	WANT (8);
850	memcpy (&fp, dec->cur, 8);	1373	memcpy (&fp, dec->cur, 8);
851	dec->cur += 8;	1374	dec->cur += 8;
…		…
854	fp = ecb_bswap64 (fp);	1377	fp = ecb_bswap64 (fp);
855		1378
856	return newSVnv (ecb_binary64_to_double (fp));	1379	return newSVnv (ecb_binary64_to_double (fp));
857	}	1380	}
858		1381
859	// 0..19 unassigned	1382	// 0..19 unassigned simple
860	// 24 reserved + unassigned (reserved values are not encodable)	1383	// 24 reserved + unassigned simple (reserved values are not encodable)
		1384	// 28-30 unassigned misc
		1385	// 31 break code
861	default:	1386	default:
862	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1387	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
863	}	1388	}
864		1389
865	break;	1390	break;
866	}	1391	}
867	#if 0
868	switch (*dec->cur)
869	{
870	//case '"': ++dec->cur; return decode_str (dec);
871	case '[': ++dec->cur; return decode_av (dec);
872	case '{': ++dec->cur; return decode_hv (dec);
873
874	case '-':
875	case '0': case '1': case '2': case '3': case '4':
876	case '5': case '6': case '7': case '8': case '9':
877	//TODO return decode_num (dec);
878
879	case 't':
880	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
881	{
882	dec->cur += 4;
883	#if CBOR_SLOW
884	cbor_true = get_bool ("CBOR::XS::true");
885	#endif
886	return newSVsv (cbor_true);
887	}
888	else
889	ERR ("'true' expected");
890
891	break;
892
893	case 'f':
894	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
895	{
896	dec->cur += 5;
897	#if CBOR_SLOW
898	cbor_false = get_bool ("CBOR::XS::false");
899	#endif
900	return newSVsv (cbor_false);
901	}
902	else
903	ERR ("'false' expected");
904
905	break;
906
907	case 'n':
908	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
909	{
910	dec->cur += 4;
911	return newSVsv (&PL_sv_undef);
912	}
913	else
914	ERR ("'null' expected");
915
916	break;
917
918	default:
919	ERR ("malformed CBOR string, neither array, object, number, string or atom");
920	break;
921	}
922	#endif
923		1392
924	fail:	1393	fail:
925	return &PL_sv_undef;	1394	return &PL_sv_undef;
926	}	1395	}
927		1396
928	static SV *	1397	static SV *
929	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1398	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
930	{	1399	{
931	dec_t dec;	1400	dec_t dec = { 0 };
932	SV *sv;	1401	SV *sv;
		1402	STRLEN len;
		1403	char *data = SvPVbyte (string, len);
933		1404
934	/* work around bugs in 5.10 where manipulating magic values
935	* makes perl ignore the magic in subsequent accesses.
936	* also make a copy of non-PV values, to get them into a clean
937	* state (SvPV should do that, but it's buggy, see below).
938	*/
939	/*SvGETMAGIC (string);*/
940	if (SvMAGICAL (string) || !SvPOK (string))
941	string = sv_2mortal (newSVsv (string));
942
943	SvUPGRADE (string, SVt_PV);
944
945	/* work around a bug in perl 5.10, which causes SvCUR to fail an
946	* assertion with -DDEBUGGING, although SvCUR is documented to
947	* return the xpv_cur field which certainly exists after upgrading.
948	* according to nicholas clark, calling SvPOK fixes this.
949	* But it doesn't fix it, so try another workaround, call SvPV_nolen
950	* and hope for the best.
951	* Damnit, SvPV_nolen still trips over yet another assertion. This
952	* assertion business is seriously broken, try yet another workaround
953	* for the broken -DDEBUGGING.
954	*/
955	{
956	#ifdef DEBUGGING
957	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
958	#else
959	STRLEN offset = SvCUR (string);
960	#endif
961
962	if (offset > cbor->max_size && cbor->max_size)	1405	if (len > cbor->max_size && cbor->max_size)
963	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1406	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
964	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1407	(unsigned long)len, (unsigned long)cbor->max_size);
965	}
966
967	sv_utf8_downgrade (string, 0);
968		1408
969	dec.cbor = *cbor;	1409	dec.cbor = *cbor;
970	dec.cur = (U8 *)SvPVX (string);	1410	dec.cur = (U8 *)data;
971	dec.end = (U8 *)SvEND (string);	1411	dec.end = (U8 *)data + len;
972	dec.err = 0;
973	dec.depth = 0;
974
975	if (dec.cbor.cb_object || dec.cbor.cb_sk_object)
976	;//TODO dec.cbor.flags |= F_HOOK;
977		1412
978	sv = decode_sv (&dec);	1413	sv = decode_sv (&dec);
979		1414
980	if (offset_return)	1415	if (offset_return)
981	*offset_return = dec.cur;	1416	*offset_return = dec.cur;
…		…
984	if (dec.cur != dec.end && !dec.err)	1419	if (dec.cur != dec.end && !dec.err)
985	dec.err = "garbage after CBOR object";	1420	dec.err = "garbage after CBOR object";
986		1421
987	if (dec.err)	1422	if (dec.err)
988	{	1423	{
		1424	if (dec.shareable)
		1425	{
		1426	// need to break cyclic links, which would all be in shareable
		1427	int i;
		1428	SV **svp;
		1429
		1430	for (i = av_len (dec.shareable) + 1; i--; )
		1431	if ((svp = av_fetch (dec.shareable, i, 0)))
		1432	sv_setsv (*svp, &PL_sv_undef);
		1433	}
		1434
989	SvREFCNT_dec (sv);	1435	SvREFCNT_dec_NN (sv);
		1436
		1437	if (dec.err_sv)
		1438	sv_2mortal (dec.err_sv);
		1439
990	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1440	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
991	}	1441	}
992		1442
993	sv = sv_2mortal (sv);	1443	sv = sv_2mortal (sv);
994		1444
995	return sv;	1445	return sv;
996	}	1446	}
997		1447
		1448	/////////////////////////////////////////////////////////////////////////////
		1449	// incremental parser
		1450
		1451	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1452
		1453	// returns 0 for notyet, 1 for success or error
		1454	static int
		1455	incr_parse (CBOR *self, SV *cborstr)
		1456	{
		1457	STRLEN cur;
		1458	SvPV (cborstr, cur);
		1459
		1460	while (ecb_expect_true (self->incr_need <= cur))
		1461	{
		1462	// table of integer count bytes
		1463	static I8 incr_len[MINOR_MASK + 1] = {
		1464	0, 0, 0, 0, 0, 0, 0, 0,
		1465	0, 0, 0, 0, 0, 0, 0, 0,
		1466	0, 0, 0, 0, 0, 0, 0, 0,
		1467	1, 2, 4, 8,-1,-1,-1,-2
		1468	};
		1469
		1470	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1471	U8 m = *p & MINOR_MASK;
		1472	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1473	I8 ilen = incr_len[m];
		1474
		1475	self->incr_need = self->incr_pos + 1;
		1476
		1477	if (ecb_expect_false (ilen < 0))
		1478	{
		1479	if (m != MINOR_INDEF)
		1480	return 1; // error
		1481
		1482	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1483	{
		1484	if (count >= 0)
		1485	return 1; // error
		1486
		1487	count = 1;
		1488	}
		1489	else
		1490	{
		1491	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1492	count = -1;
		1493	}
		1494	}
		1495	else
		1496	{
		1497	self->incr_need += ilen;
		1498	if (ecb_expect_false (self->incr_need > cur))
		1499	return 0;
		1500
		1501	int major = *p >> MAJOR_SHIFT;
		1502
		1503	switch (major)
		1504	{
		1505	case MAJOR_TAG >> MAJOR_SHIFT:
		1506	++count; // tags merely prefix another value
		1507	break;
		1508
		1509	case MAJOR_BYTES >> MAJOR_SHIFT:
		1510	case MAJOR_TEXT >> MAJOR_SHIFT:
		1511	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1512	case MAJOR_MAP >> MAJOR_SHIFT:
		1513	{
		1514	UV len;
		1515
		1516	if (ecb_expect_false (ilen))
		1517	{
		1518	len = 0;
		1519
		1520	do {
		1521	len = (len << 8) | *++p;
		1522	} while (--ilen);
		1523	}
		1524	else
		1525	len = m;
		1526
		1527	switch (major)
		1528	{
		1529	case MAJOR_BYTES >> MAJOR_SHIFT:
		1530	case MAJOR_TEXT >> MAJOR_SHIFT:
		1531	self->incr_need += len;
		1532	if (ecb_expect_false (self->incr_need > cur))
		1533	return 0;
		1534
		1535	break;
		1536
		1537	case MAJOR_MAP >> MAJOR_SHIFT:
		1538	len <<= 1;
		1539	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1540	if (len)
		1541	{
		1542	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1543	count = len + 1;
		1544	}
		1545	break;
		1546	}
		1547	}
		1548	}
		1549	}
		1550
		1551	self->incr_pos = self->incr_need;
		1552
		1553	if (count > 0)
		1554	{
		1555	while (!--count)
		1556	{
		1557	if (!AvFILLp (self->incr_count))
		1558	return 1; // done
		1559
		1560	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1561	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1562	}
		1563
		1564	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1565	}
		1566	}
		1567
		1568	return 0;
		1569	}
		1570
		1571
998	/////////////////////////////////////////////////////////////////////////////	1572	/////////////////////////////////////////////////////////////////////////////
999	// XS interface functions	1573	// XS interface functions
1000		1574
1001	MODULE = CBOR::XS PACKAGE = CBOR::XS	1575	MODULE = CBOR::XS PACKAGE = CBOR::XS
1002		1576
1003	BOOT:	1577	BOOT:
1004	{	1578	{
1005	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1579	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1006	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1580	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1007		1581
1008	cbor_true = get_bool ("CBOR::XS::true");	1582	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1009	cbor_false = get_bool ("CBOR::XS::false");	1583	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1584
		1585	types_true = get_bool ("Types::Serialiser::true" );
		1586	types_false = get_bool ("Types::Serialiser::false");
		1587	types_error = get_bool ("Types::Serialiser::error");
		1588
		1589	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1590
		1591	sv_cbor = newSVpv ("CBOR", 0);
		1592	SvREADONLY_on (sv_cbor);
		1593
		1594	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
1010	}	1595	}
1011		1596
1012	PROTOTYPES: DISABLE	1597	PROTOTYPES: DISABLE
1013		1598
1014	void CLONE (...)	1599	void CLONE (...)
1015	CODE:	1600	CODE:
1016	cbor_stash = 0;	1601	cbor_stash = 0;
		1602	cbor_tagged_stash = 0;
		1603	types_error_stash = 0;
1017	cbor_boolean_stash = 0;	1604	types_boolean_stash = 0;
1018		1605
1019	void new (char *klass)	1606	void new (char *klass)
1020	PPCODE:	1607	PPCODE:
1021	{	1608	{
1022	SV *pv = NEWSV (0, sizeof (CBOR));	1609	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1030		1617
1031	void shrink (CBOR *self, int enable = 1)	1618	void shrink (CBOR *self, int enable = 1)
1032	ALIAS:	1619	ALIAS:
1033	shrink = F_SHRINK	1620	shrink = F_SHRINK
1034	allow_unknown = F_ALLOW_UNKNOWN	1621	allow_unknown = F_ALLOW_UNKNOWN
		1622	allow_sharing = F_ALLOW_SHARING
		1623	allow_cycles = F_ALLOW_CYCLES
		1624	forbid_objects = F_FORBID_OBJECTS
		1625	pack_strings = F_PACK_STRINGS
		1626	text_keys = F_TEXT_KEYS
		1627	text_strings = F_TEXT_STRINGS
		1628	validate_utf8 = F_VALIDATE_UTF8
1035	PPCODE:	1629	PPCODE:
1036	{	1630	{
1037	if (enable)	1631	if (enable)
1038	self->flags |= ix;	1632	self->flags |= ix;
1039	else	1633	else
…		…
1044		1638
1045	void get_shrink (CBOR *self)	1639	void get_shrink (CBOR *self)
1046	ALIAS:	1640	ALIAS:
1047	get_shrink = F_SHRINK	1641	get_shrink = F_SHRINK
1048	get_allow_unknown = F_ALLOW_UNKNOWN	1642	get_allow_unknown = F_ALLOW_UNKNOWN
		1643	get_allow_sharing = F_ALLOW_SHARING
		1644	get_allow_cycles = F_ALLOW_CYCLES
		1645	get_forbid_objects = F_FORBID_OBJECTS
		1646	get_pack_strings = F_PACK_STRINGS
		1647	get_text_keys = F_TEXT_KEYS
		1648	get_text_strings = F_TEXT_STRINGS
		1649	get_validate_utf8 = F_VALIDATE_UTF8
1049	PPCODE:	1650	PPCODE:
1050	XPUSHs (boolSV (self->flags & ix));	1651	XPUSHs (boolSV (self->flags & ix));
1051		1652
1052	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1653	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1053	PPCODE:	1654	PPCODE:
…		…
1069	CODE:	1670	CODE:
1070	RETVAL = self->max_size;	1671	RETVAL = self->max_size;
1071	OUTPUT:	1672	OUTPUT:
1072	RETVAL	1673	RETVAL
1073		1674
1074	#if 0 //TODO	1675	void filter (CBOR *self, SV *filter = 0)
1075
1076	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1077	PPCODE:	1676	PPCODE:
1078	{
1079	SvREFCNT_dec (self->cb_object);	1677	SvREFCNT_dec (self->filter);
1080	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1678	self->filter = filter ? newSVsv (filter) : filter;
1081
1082	XPUSHs (ST (0));	1679	XPUSHs (ST (0));
1083	}
1084		1680
1085	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1681	SV *get_filter (CBOR *self)
1086	PPCODE:	1682	CODE:
1087	{	1683	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1088	if (!self->cb_sk_object)	1684	OUTPUT:
1089	self->cb_sk_object = newHV ();	1685	RETVAL
1090
1091	if (SvOK (cb))
1092	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1093	else
1094	{
1095	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1096
1097	if (!HvKEYS (self->cb_sk_object))
1098	{
1099	SvREFCNT_dec (self->cb_sk_object);
1100	self->cb_sk_object = 0;
1101	}
1102	}
1103
1104	XPUSHs (ST (0));
1105	}
1106
1107	#endif
1108		1686
1109	void encode (CBOR *self, SV *scalar)	1687	void encode (CBOR *self, SV *scalar)
1110	PPCODE:	1688	PPCODE:
1111	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1689	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1112	XPUSHs (scalar);	1690	XPUSHs (scalar);
…		…
1125	EXTEND (SP, 2);	1703	EXTEND (SP, 2);
1126	PUSHs (sv);	1704	PUSHs (sv);
1127	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1705	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1128	}	1706	}
1129		1707
		1708	void incr_parse (CBOR *self, SV *cborstr)
		1709	ALIAS:
		1710	incr_parse_multiple = 1
		1711	PPCODE:
		1712	{
		1713	if (SvUTF8 (cborstr))
		1714	sv_utf8_downgrade (cborstr, 0);
		1715
		1716	if (!self->incr_count)
		1717	{
		1718	self->incr_count = newAV ();
		1719	self->incr_pos = 0;
		1720	self->incr_need = 1;
		1721
		1722	av_push (self->incr_count, newSViv (1));
		1723	}
		1724
		1725	do
		1726	{
		1727	if (!incr_parse (self, cborstr))
		1728	{
		1729	if (self->incr_need > self->max_size && self->max_size)
		1730	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1731	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1732
		1733	break;
		1734	}
		1735
		1736	SV *sv;
		1737	char *offset;
		1738
		1739	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1740	XPUSHs (sv);
		1741
		1742	sv_chop (cborstr, offset);
		1743
		1744	av_clear (self->incr_count);
		1745	av_push (self->incr_count, newSViv (1));
		1746
		1747	self->incr_pos = 0;
		1748	self->incr_need = self->incr_pos + 1;
		1749	}
		1750	while (ix);
		1751	}
		1752
		1753	void incr_reset (CBOR *self)
		1754	CODE:
		1755	{
		1756	SvREFCNT_dec (self->incr_count);
		1757	self->incr_count = 0;
		1758	}
		1759
1130	void DESTROY (CBOR *self)	1760	void DESTROY (CBOR *self)
1131	CODE:	1761	PPCODE:
1132	SvREFCNT_dec (self->cb_sk_object);	1762	cbor_free (self);
1133	SvREFCNT_dec (self->cb_object);
1134		1763
1135	PROTOTYPES: ENABLE	1764	PROTOTYPES: ENABLE
1136		1765
1137	void encode_cbor (SV *scalar)	1766	void encode_cbor (SV *scalar)
		1767	ALIAS:
		1768	encode_cbor = 0
		1769	encode_cbor_sharing = F_ALLOW_SHARING
1138	PPCODE:	1770	PPCODE:
1139	{	1771	{
1140	CBOR cbor;	1772	CBOR cbor;
1141	cbor_init (&cbor);	1773	cbor_init (&cbor);
		1774	cbor.flags |= ix;
1142	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1775	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1143	XPUSHs (scalar);	1776	XPUSHs (scalar);
1144	}	1777	}
1145		1778
1146	void decode_cbor (SV *cborstr)	1779	void decode_cbor (SV *cborstr)
…		…
1150	cbor_init (&cbor);	1783	cbor_init (&cbor);
1151	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1784	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1152	XPUSHs (cborstr);	1785	XPUSHs (cborstr);
1153	}	1786	}
1154		1787
		1788	#ifdef __AFL_COMPILER
		1789
		1790	void
		1791	afl_init ()
		1792	CODE:
		1793	__AFL_INIT ();
		1794
		1795	int
		1796	afl_loop (unsigned int count = 10000)
		1797	CODE:
		1798	RETVAL = __AFL_LOOP (count);
		1799	OUTPUT:
		1800	RETVAL
		1801
		1802	#endif
		1803

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