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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 1.68 by root, Mon Nov 30 18:30:29 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_forced (enc_t *enc, UV type, SV *sv)
		424	{
		425	switch (type)
		426	{
		427	case AS_CBOR:
		428	{
		429	STRLEN len;
		430	char *str = SvPVbyte (sv, len);
		431
		432	need (enc, len);
		433	memcpy (enc->cur, str, len);
		434	enc->cur += len;
		435	}
		436	break;
		437
		438	case AS_BYTES:
		439	{
		440	STRLEN len;
		441	char *str = SvPVbyte (sv, len);
		442	encode_strref (enc, 0, 0, str, len);
		443	}
		444	break;
		445
		446	case AS_TEXT:
		447	{
		448	STRLEN len;
		449	char *str = SvPVutf8 (sv, len);
		450	encode_strref (enc, 1, 1, str, len);
		451	}
		452	break;
		453
		454	case AS_INT: encode_int (enc, sv); break;
		455	case AS_FLOAT16: encode_float16 (enc, SvNV (sv)); break;
		456	case AS_FLOAT32: encode_float32 (enc, SvNV (sv)); break;
		457	case AS_FLOAT64: encode_float64 (enc, SvNV (sv)); break;
		458
		459	default:
		460	croak ("encountered malformed CBOR::XS::Tagged object");
		461	}
		462	}
		463
170	static void encode_sv (enc_t *enc, SV *sv);	464	static void encode_sv (enc_t *enc, SV *sv);
171		465
172	static void	466	static void
173	encode_av (enc_t *enc, AV *av)	467	encode_av (enc_t *enc, AV *av)
174	{	468	{
…		…
177	if (enc->depth >= enc->cbor.max_depth)	471	if (enc->depth >= enc->cbor.max_depth)
178	croak (ERR_NESTING_EXCEEDED);	472	croak (ERR_NESTING_EXCEEDED);
179		473
180	++enc->depth;	474	++enc->depth;
181		475
182	encode_uint (enc, 0x80, len + 1);	476	encode_uint (enc, MAJOR_ARRAY, len + 1);
183		477
		478	if (ecb_expect_false (SvMAGICAL (av)))
184	for (i = 0; i <= len; ++i)	479	for (i = 0; i <= len; ++i)
185	{	480	{
186	SV **svp = av_fetch (av, i, 0);	481	SV **svp = av_fetch (av, i, 0);
187	encode_sv (enc, svp ? *svp : &PL_sv_undef);	482	encode_sv (enc, svp ? *svp : &PL_sv_undef);
188	}	483	}
		484	else
		485	for (i = 0; i <= len; ++i)
		486	{
		487	SV *sv = AvARRAY (av)[i];
		488	encode_sv (enc, sv ? sv : &PL_sv_undef);
		489	}
189		490
190	--enc->depth;	491	--enc->depth;
191	}	492	}
192		493
193	static void	494	static void
…		…
201	++enc->depth;	502	++enc->depth;
202		503
203	int pairs = hv_iterinit (hv);	504	int pairs = hv_iterinit (hv);
204	int mg = SvMAGICAL (hv);	505	int mg = SvMAGICAL (hv);
205		506
206	if (mg)	507	if (ecb_expect_false (mg))
207	encode_ch (enc, 0xa0 | 31);	508	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
208	else	509	else
209	encode_uint (enc, 0xa0, pairs);	510	encode_uint (enc, MAJOR_MAP, pairs);
210		511
211	while ((he = hv_iternext (hv)))	512	while ((he = hv_iternext (hv)))
212	{	513	{
213	if (HeKLEN (he) == HEf_SVKEY)	514	if (HeKLEN (he) == HEf_SVKEY)
214	encode_sv (enc, HeSVKEY (he));	515	encode_sv (enc, HeSVKEY (he));
215	else	516	else
216	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	517	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
217		518
218	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	519	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
219	}	520	}
220		521
221	if (mg)	522	if (ecb_expect_false (mg))
222	encode_ch (enc, 0xe0 | 31);	523	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
223		524
224	--enc->depth;	525	--enc->depth;
225	}	526	}
226		527
227	// encode objects, arrays and special \0=false and \1=true values.	528	// encode objects, arrays and special \0=false and \1=true values.
228	static void	529	static void
229	encode_rv (enc_t *enc, SV *sv)	530	encode_rv (enc_t *enc, SV *sv)
230	{	531	{
231	svtype svt;
232
233	SvGETMAGIC (sv);	532	SvGETMAGIC (sv);
		533
234	svt = SvTYPE (sv);	534	svtype svt = SvTYPE (sv);
235		535
236	if (ecb_expect_false (SvOBJECT (sv)))	536	if (ecb_expect_false (SvOBJECT (sv)))
237	{	537	{
238	HV *stash = !CBOR_SLOW || cbor_boolean_stash	538	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
239	? cbor_boolean_stash	539	? types_boolean_stash
		540	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		541	HV *error_stash = !CBOR_SLOW || types_error_stash
		542	? types_error_stash
		543	: gv_stashpv ("Types::Serialiser::Error", 1);
		544	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		545	? cbor_tagged_stash
240	: gv_stashpv ("CBOR::XS::Boolean", 1);	546	: gv_stashpv ("CBOR::XS::Tagged" , 1);
241		547
242	if (SvSTASH (sv) == stash)	548	HV *stash = SvSTASH (sv);
243	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	549
		550	if (stash == boolean_stash)
		551	{
		552	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		553	return;
		554	}
		555	else if (stash == error_stash)
		556	{
		557	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		558	return;
		559	}
		560	else if (stash == tagged_stash)
		561	{
		562	if (svt != SVt_PVAV)
		563	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		564
		565	switch (av_len ((AV *)sv))
		566	{
		567	case 2-1:
		568	// actually a tagged value
		569	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
		570	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		571	break;
		572
		573	case 3-1:
		574	// a forced type [value, type, undef]
		575	encode_forced (enc, SvUV (*av_fetch ((AV *)sv, 1, 1)), *av_fetch ((AV *)sv, 0, 1));
		576	break;
		577
		578	default:
		579	croak ("encountered malformed CBOR::XS::Tagged object");
		580	}
		581
		582	return;
		583	}
		584	}
		585
		586	if (ecb_expect_false (SvREFCNT (sv) > 1)
		587	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		588	{
		589	if (ecb_expect_false (!enc->shareable))
		590	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		591
		592	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		593
		594	if (SvOK (*svp))
		595	{
		596	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		597	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		598	return;
		599	}
244	else	600	else
245	{	601	{
246	#if 0 //TODO	602	sv_setuv (*svp, enc->shareable_idx);
247	if (enc->cbor.flags & F_CONV_BLESSED)	603	++enc->shareable_idx;
		604	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		605	}
		606	}
		607
		608	if (ecb_expect_false (SvOBJECT (sv)))
		609	{
		610	HV *stash = SvSTASH (sv);
		611	GV *method;
		612
		613	if (enc->cbor.flags & F_FORBID_OBJECTS)
		614	croak ("encountered object '%s', but forbid_objects is enabled",
		615	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		616	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
248	{	617	{
		618	dSP;
		619
		620	ENTER; SAVETMPS;
		621	PUSHMARK (SP);
249	// we re-bless the reference to get overload and other niceties right	622	// 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)));	623	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
258		624
259	// calling with G_SCALAR ensures that we always get a 1 return value
260	PUTBACK;	625	PUTBACK;
		626	// G_SCALAR ensures that return value is 1
261	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	627	call_sv ((SV *)GvCV (method), G_SCALAR);
262	SPAGAIN;	628	SPAGAIN;
263		629
264	// catch this surprisingly common error	630	// catch this surprisingly common error
265	if (SvROK (TOPs) && SvRV (TOPs) == sv)	631	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)));	632	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
267		633
268	sv = POPs;
269	PUTBACK;
270
271	encode_sv (enc, sv);	634	encode_sv (enc, POPs);
272		635
		636	PUTBACK;
		637
273	FREETMPS; LEAVE;	638	FREETMPS; LEAVE;
274	}	639	}
275	else if (enc->cbor.flags & F_ALLOW_BLESSED)	640	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
276	encode_str (enc, "null", 4, 0);	641	{
277	else	642	dSP;
278	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it",	643
279	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	644	ENTER; SAVETMPS;
		645	PUSHMARK (SP);
		646	EXTEND (SP, 2);
		647	// we re-bless the reference to get overload and other niceties right
		648	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		649	PUSHs (sv_cbor);
		650
		651	PUTBACK;
		652	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		653	SPAGAIN;
		654
		655	// catch this surprisingly common error
		656	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		657	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		658
		659	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		660	encode_uint (enc, MAJOR_ARRAY, count + 1);
		661	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		662
		663	{
		664	int i;
		665
		666	for (i = 0; i < count; ++i)
		667	encode_sv (enc, SP[i + 1 - count]);
		668
		669	SP -= count;
280	}	670	}
281	else if (enc->cbor.flags & F_ALLOW_BLESSED)	671
282	encode_str (enc, "null", 4, 0);	672	PUTBACK;
		673
		674	FREETMPS; LEAVE;
		675	}
283	else	676	else
284	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	677	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
285	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	678	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
286	#endif
287	}
288	}	679	}
289	else if (svt == SVt_PVHV)	680	else if (svt == SVt_PVHV)
290	encode_hv (enc, (HV *)sv);	681	encode_hv (enc, (HV *)sv);
291	else if (svt == SVt_PVAV)	682	else if (svt == SVt_PVAV)
292	encode_av (enc, (AV *)sv);	683	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	684	else
311	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	685	{
312	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	686	encode_tag (enc, CBOR_TAG_INDIRECTION);
		687	encode_sv (enc, sv);
		688	}
313	}	689	}
314		690
315	static void	691	static void
316	encode_nv (enc_t *enc, SV *sv)	692	encode_nv (enc_t *enc, SV *sv)
317	{	693	{
318	double nv = SvNVX (sv);	694	double nv = SvNVX (sv);
319		695
320	need (enc, 9);	696	need (enc, 9);
321		697
322	if (ecb_expect_false (nv == (U32)nv))	698	if (ecb_expect_false (nv == (NV)(U32)nv))
323	encode_uint (enc, 0x00, (U32)nv);	699	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
324	//TODO: maybe I32?	700	//TODO: maybe I32?
325	else if (ecb_expect_false (nv == (float)nv))	701	else if (ecb_expect_false (nv == (float)nv))
326	{	702	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	703	else
338	{	704	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	}	705	}
350		706
351	static void	707	static void
352	encode_sv (enc_t *enc, SV *sv)	708	encode_sv (enc_t *enc, SV *sv)
353	{	709	{
…		…
355		711
356	if (SvPOKp (sv))	712	if (SvPOKp (sv))
357	{	713	{
358	STRLEN len;	714	STRLEN len;
359	char *str = SvPV (sv, len);	715	char *str = SvPV (sv, len);
360	encode_str (enc, SvUTF8 (sv), str, len);	716	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
361	}	717	}
362	else if (SvNOKp (sv))	718	else if (SvNOKp (sv))
363	encode_nv (enc, sv);	719	encode_nv (enc, sv);
364	else if (SvIOKp (sv))	720	else if (SvIOKp (sv))
365	{	721	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))	722	else if (SvROK (sv))
374	encode_rv (enc, SvRV (sv));	723	encode_rv (enc, SvRV (sv));
375	else if (!SvOK (sv))	724	else if (!SvOK (sv))
376	encode_ch (enc, 0xe0 | 22);	725	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
377	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	726	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
378	encode_ch (enc, 0xe0 | 23);	727	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
379	else	728	else
380	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	729	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
381	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	730	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
382	}	731	}
383		732
384	static SV *	733	static SV *
385	encode_cbor (SV *scalar, CBOR *cbor)	734	encode_cbor (SV *scalar, CBOR *cbor)
386	{	735	{
387	enc_t enc;	736	enc_t enc = { 0 };
388		737
389	enc.cbor = *cbor;	738	enc.cbor = *cbor;
390	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	739	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
391	enc.cur = SvPVX (enc.sv);	740	enc.cur = SvPVX (enc.sv);
392	enc.end = SvEND (enc.sv);	741	enc.end = SvEND (enc.sv);
393	enc.depth = 0;
394		742
395	SvPOK_only (enc.sv);	743	SvPOK_only (enc.sv);
		744
		745	if (cbor->flags & F_PACK_STRINGS)
		746	{
		747	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		748	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		749	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		750	}
		751
396	encode_sv (&enc, scalar);	752	encode_sv (&enc, scalar);
397		753
398	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	754	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
399	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	755	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
400		756
…		…
414	U8 *end; // end of input string	770	U8 *end; // end of input string
415	const char *err; // parse error, if != 0	771	const char *err; // parse error, if != 0
416	CBOR cbor;	772	CBOR cbor;
417	U32 depth; // recursion depth	773	U32 depth; // recursion depth
418	U32 maxdepth; // recursion depth limit	774	U32 maxdepth; // recursion depth limit
		775	AV *shareable;
		776	AV *stringref;
		777	SV *decode_tagged;
		778	SV *err_sv; // optional sv for error, needs to be freed
419	} dec_t;	779	} dec_t;
420		780
421	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	781	// set dec->err to ERRSV
		782	ecb_cold static void
		783	err_errsv (dec_t *dec)
		784	{
		785	if (!dec->err)
		786	{
		787	dec->err_sv = newSVsv (ERRSV);
422		788
423	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	789	// chop off the trailing \n
		790	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		791	*SvEND (dec->err_sv) = 0;
424		792
		793	dec->err = SvPVutf8_nolen (dec->err_sv);
		794	}
		795	}
		796
		797	// the following functions are used to reduce code size and help the compiler to optimise
		798	ecb_cold static void
		799	err_set (dec_t *dec, const char *reason)
		800	{
		801	if (!dec->err)
		802	dec->err = reason;
		803	}
		804
		805	ecb_cold static void
		806	err_unexpected_end (dec_t *dec)
		807	{
		808	err_set (dec, "unexpected end of CBOR data");
		809	}
		810
		811	#define ERR_DO(do) SB do; goto fail; SE
		812	#define ERR(reason) ERR_DO (err_set (dec, reason))
		813	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		814
		815	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		816
425	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	817	#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	818	#define DEC_DEC_DEPTH --dec->depth
427		819
428	static UV	820	static UV
429	decode_uint (dec_t *dec)	821	decode_uint (dec_t *dec)
430	{	822	{
431	switch (*dec->cur & 31)	823	U8 m = *dec->cur & MINOR_MASK;
432	{	824	++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		825
438	case 24:	826	if (ecb_expect_true (m < LENGTH_EXT1))
		827	return m;
		828	else if (ecb_expect_true (m == LENGTH_EXT1))
		829	{
439	WANT (2);	830	WANT (1);
440	dec->cur += 2;	831	dec->cur += 1;
441	return dec->cur[-1];	832	return dec->cur[-1];
442		833	}
443	case 25:	834	else if (ecb_expect_true (m == LENGTH_EXT2))
		835	{
444	WANT (3);	836	WANT (2);
445	dec->cur += 3;	837	dec->cur += 2;
446	return (((UV)dec->cur[-2]) << 8)	838	return (((UV)dec->cur[-2]) << 8)
447	| ((UV)dec->cur[-1]);	839	| ((UV)dec->cur[-1]);
448		840	}
449	case 26:	841	else if (ecb_expect_true (m == LENGTH_EXT4))
		842	{
450	WANT (5);	843	WANT (4);
451	dec->cur += 5;	844	dec->cur += 4;
452	return (((UV)dec->cur[-4]) << 24)	845	return (((UV)dec->cur[-4]) << 24)
453	| (((UV)dec->cur[-3]) << 16)	846	| (((UV)dec->cur[-3]) << 16)
454	| (((UV)dec->cur[-2]) << 8)	847	| (((UV)dec->cur[-2]) << 8)
455	| ((UV)dec->cur[-1]);	848	| ((UV)dec->cur[-1]);
456		849	}
457	case 27:	850	else if (ecb_expect_true (m == LENGTH_EXT8))
		851	{
458	WANT (9);	852	WANT (8);
459	dec->cur += 9;	853	dec->cur += 8;
		854
		855	return
		856	#if UVSIZE < 8
		857	0
		858	#else
460	return (((UV)dec->cur[-8]) << 56)	859	(((UV)dec->cur[-8]) << 56)
461	| (((UV)dec->cur[-7]) << 48)	860	| (((UV)dec->cur[-7]) << 48)
462	| (((UV)dec->cur[-6]) << 40)	861	| (((UV)dec->cur[-6]) << 40)
463	| (((UV)dec->cur[-5]) << 32)	862	| (((UV)dec->cur[-5]) << 32)
		863	#endif
464	| (((UV)dec->cur[-4]) << 24)	864	| (((UV)dec->cur[-4]) << 24)
465	| (((UV)dec->cur[-3]) << 16)	865	| (((UV)dec->cur[-3]) << 16)
466	| (((UV)dec->cur[-2]) << 8)	866	| (((UV)dec->cur[-2]) << 8)
467	| ((UV)dec->cur[-1]);	867	| ((UV)dec->cur[-1]);
468		868	}
469	default:	869	else
470	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	870	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
471	}
472		871
473	fail:	872	fail:
474	return 0;	873	return 0;
475	}	874	}
476		875
…		…
481	{	880	{
482	AV *av = newAV ();	881	AV *av = newAV ();
483		882
484	DEC_INC_DEPTH;	883	DEC_INC_DEPTH;
485		884
486	if ((*dec->cur & 31) == 31)	885	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
487	{	886	{
488	++dec->cur;	887	++dec->cur;
489		888
490	for (;;)	889	for (;;)
491	{	890	{
492	WANT (1);	891	WANT (1);
493		892
494	if (*dec->cur == (0xe0 | 31))	893	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
495	{	894	{
496	++dec->cur;	895	++dec->cur;
497	break;	896	break;
498	}	897	}
499		898
500	av_push (av, decode_sv (dec));	899	av_push (av, decode_sv (dec));
501	}	900	}
502	}	901	}
503	else	902	else
504	{	903	{
505	int i, len = decode_uint (dec);	904	UV i, len = decode_uint (dec);
506		905
		906	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);	907	av_fill (av, len - 1);
508		908
509	for (i = 0; i < len; ++i)	909	for (i = 0; i < len; ++i)
510	AvARRAY (av)[i] = decode_sv (dec);	910	AvARRAY (av)[i] = decode_sv (dec);
511	}	911	}
512		912
513	DEC_DEC_DEPTH;	913	DEC_DEC_DEPTH;
514	return newRV_noinc ((SV *)av);	914	return newRV_noinc ((SV *)av);
515		915
516	fail:	916	fail:
517	SvREFCNT_dec (av);	917	SvREFCNT_dec_NN (av);
518	DEC_DEC_DEPTH;	918	DEC_DEC_DEPTH;
519	return &PL_sv_undef;	919	return &PL_sv_undef;
520	}	920	}
521		921
		922	static void
		923	decode_he (dec_t *dec, HV *hv)
		924	{
		925	// for speed reasons, we specialcase single-string
		926	// byte or utf-8 strings as keys, but only when !stringref
		927
		928	if (ecb_expect_true (!dec->stringref))
		929	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		930	{
		931	STRLEN len = decode_uint (dec);
		932	char *key = (char *)dec->cur;
		933
		934	WANT (len);
		935	dec->cur += len;
		936
		937	hv_store (hv, key, len, decode_sv (dec), 0);
		938
		939	return;
		940	}
		941	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		942	{
		943	STRLEN len = decode_uint (dec);
		944	char *key = (char *)dec->cur;
		945
		946	WANT (len);
		947	dec->cur += len;
		948
		949	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		950	if (!is_utf8_string (key, len))
		951	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		952
		953	hv_store (hv, key, -len, decode_sv (dec), 0);
		954
		955	return;
		956	}
		957
		958	SV *k = decode_sv (dec);
		959	SV *v = decode_sv (dec);
		960
		961	// we leak memory if uncaught exceptions are thrown by random magical
		962	// methods, and this is hopefully the only place where it can happen,
		963	// so if there is a chance of an exception, take the very slow path.
		964	// since catching exceptions is "undocumented/internal/forbidden" by
		965	// the new p5p powers, we need to call out to a perl function :/
		966	if (ecb_expect_false (SvAMAGIC (k)))
		967	{
		968	dSP;
		969
		970	ENTER; SAVETMPS;
		971	PUSHMARK (SP);
		972	EXTEND (SP, 3);
		973	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		974	PUSHs (sv_2mortal (k));
		975	PUSHs (sv_2mortal (v));
		976
		977	PUTBACK;
		978	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		979	SPAGAIN;
		980
		981	FREETMPS; LEAVE;
		982
		983	if (SvTRUE (ERRSV))
		984	ERR_ERRSV;
		985
		986	return;
		987	}
		988
		989	hv_store_ent (hv, k, v, 0);
		990	SvREFCNT_dec_NN (k);
		991
		992	fail:
		993	;
		994	}
		995
522	static SV *	996	static SV *
523	decode_hv (dec_t *dec)	997	decode_hv (dec_t *dec)
524	{	998	{
525	HV *hv = newHV ();	999	HV *hv = newHV ();
526		1000
527	DEC_INC_DEPTH;	1001	DEC_INC_DEPTH;
528		1002
529	if ((*dec->cur & 31) == 31)	1003	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
530	{	1004	{
531	++dec->cur;	1005	++dec->cur;
532		1006
533	for (;;)	1007	for (;;)
534	{	1008	{
535	WANT (1);	1009	WANT (1);
536		1010
537	if (*dec->cur == (0xe0 | 31))	1011	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
538	{	1012	{
539	++dec->cur;	1013	++dec->cur;
540	break;	1014	break;
541	}	1015	}
542		1016
543	SV *k = decode_sv (dec);	1017	decode_he (dec, hv);
544	SV *v = decode_sv (dec);
545
546	hv_store_ent (hv, k, v, 0);
547	}	1018	}
548	}	1019	}
549	else	1020	else
550	{	1021	{
551	int len = decode_uint (dec);	1022	UV pairs = decode_uint (dec);
552		1023
		1024	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1025
553	while (len--)	1026	while (pairs--)
554	{	1027	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	}	1028	}
561		1029
562	DEC_DEC_DEPTH;	1030	DEC_DEC_DEPTH;
563	return newRV_noinc ((SV *)hv);	1031	return newRV_noinc ((SV *)hv);
564		1032
565	#if 0	1033	fail:
566	SV *sv;	1034	SvREFCNT_dec_NN (hv);
567	HV *hv = newHV ();
568
569	DEC_INC_DEPTH;	1035	DEC_DEC_DEPTH;
570	decode_ws (dec);	1036	return &PL_sv_undef;
		1037	}
571		1038
572	for (;;)	1039	static SV *
573	{	1040	decode_str (dec_t *dec, int utf8)
574	// heuristic: assume that	1041	{
575	// a) decode_str + hv_store_ent are abysmally slow.	1042	SV *sv = 0;
576	// b) most hash keys are short, simple ascii text.	1043
577	// => try to "fast-match" such strings to avoid	1044	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
578	// the overhead of decode_str + hv_store_ent.
579	{	1045	{
580	SV *value;	1046	// indefinite length strings
581	char *p = dec->cur;	1047	++dec->cur;
582	char *e = p + 24; // only try up to 24 bytes
583		1048
		1049	U8 major = *dec->cur & MAJOR_MISC;
		1050
		1051	sv = newSVpvn ("", 0);
		1052
584	for (;;)	1053	for (;;)
585	{	1054	{
586	// the >= 0x80 is false on most architectures	1055	WANT (1);
587	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')	1056
		1057	if ((*dec->cur - major) > LENGTH_EXT8)
		1058	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
588	{	1059	{
589	// slow path, back up and use decode_str	1060	++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;	1061	break;
608	}	1062	}
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	{	1063	else
674	dSP;	1064	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
675	int count;
676		1065
677	ENTER; SAVETMPS; PUSHMARK (SP);	1066	STRLEN len = decode_uint (dec);
678	XPUSHs (HeVAL (he));
679	sv_2mortal (sv);
680		1067
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);	1068	WANT (len);
741		1069	sv_catpvn (sv, dec->cur, len);
742	if (*dec->cur == (0xe0 | 31))	1070	dec->cur += len;
743	{
744	++dec->cur;
745	break;
746	}
747
748	SV *sv2 = decode_sv (dec);
749	sv_catsv (sv, sv2);
750	}	1071	}
751	}	1072	}
752	else	1073	else
753	{	1074	{
754	STRLEN len = decode_uint (dec);	1075	STRLEN len = decode_uint (dec);
755		1076
756	WANT (len);	1077	WANT (len);
757	sv = newSVpvn (dec->cur, len);	1078	sv = newSVpvn (dec->cur, len);
758	dec->cur += len;	1079	dec->cur += len;
		1080
		1081	if (ecb_expect_false (dec->stringref)
		1082	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		1083	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
759	}	1084	}
760		1085
761	if (utf8)	1086	if (utf8)
		1087	{
		1088	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		1089	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		1090	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		1091
762	SvUTF8_on (sv);	1092	SvUTF8_on (sv);
		1093	}
763		1094
764	return sv;	1095	return sv;
765		1096
766	fail:	1097	fail:
		1098	SvREFCNT_dec (sv);
767	return &PL_sv_undef;	1099	return &PL_sv_undef;
768	}	1100	}
769		1101
770	static SV *	1102	static SV *
771	decode_tagged (dec_t *dec)	1103	decode_tagged (dec_t *dec)
772	{	1104	{
		1105	SV *sv = 0;
773	UV tag = decode_uint (dec);	1106	UV tag = decode_uint (dec);
		1107
		1108	WANT (1);
		1109
		1110	switch (tag)
		1111	{
		1112	case CBOR_TAG_MAGIC:
774	SV *sv = decode_sv (dec);	1113	sv = decode_sv (dec);
		1114	break;
775		1115
776	if (tag == 55799) // 2.4.5 Self-Describe CBOR	1116	case CBOR_TAG_INDIRECTION:
		1117	sv = newRV_noinc (decode_sv (dec));
		1118	break;
		1119
		1120	case CBOR_TAG_STRINGREF_NAMESPACE:
		1121	{
		1122	// do not use SAVETMPS/FREETMPS, as these will
		1123	// erase mortalised caches, e.g. "shareable"
		1124	ENTER;
		1125
		1126	SAVESPTR (dec->stringref);
		1127	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1128
		1129	sv = decode_sv (dec);
		1130
		1131	LEAVE;
		1132	}
		1133	break;
		1134
		1135	case CBOR_TAG_STRINGREF:
		1136	{
		1137	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1138	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1139
		1140	UV idx = decode_uint (dec);
		1141
		1142	if (!dec->stringref || idx >= (UV)(1 + AvFILLp (dec->stringref)))
		1143	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1144
		1145	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1146	}
		1147	break;
		1148
		1149	case CBOR_TAG_VALUE_SHAREABLE:
		1150	{
		1151	if (ecb_expect_false (!dec->shareable))
		1152	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1153
		1154	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1155	{
		1156	sv = newSV (0);
		1157	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1158
		1159	SV *osv = decode_sv (dec);
		1160	sv_setsv (sv, osv);
		1161	SvREFCNT_dec_NN (osv);
		1162	}
		1163	else
		1164	{
		1165	av_push (dec->shareable, &PL_sv_undef);
		1166	int idx = AvFILLp (dec->shareable);
		1167	sv = decode_sv (dec);
		1168	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1169	}
		1170	}
		1171	break;
		1172
		1173	case CBOR_TAG_VALUE_SHAREDREF:
		1174	{
		1175	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1176	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1177
		1178	UV idx = decode_uint (dec);
		1179
		1180	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
		1181	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1182
		1183	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1184
		1185	if (sv == &PL_sv_undef)
		1186	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1187	}
		1188	break;
		1189
		1190	case CBOR_TAG_PERL_OBJECT:
		1191	{
		1192	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1193	goto filter;
		1194
		1195	sv = decode_sv (dec);
		1196
		1197	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1198	ERR ("corrupted CBOR data (non-array perl object)");
		1199
		1200	AV *av = (AV *)SvRV (sv);
		1201	int len = av_len (av) + 1;
		1202	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1203
		1204	if (!stash)
		1205	ERR ("cannot decode perl-object (package does not exist)");
		1206
		1207	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1208
		1209	if (!method)
		1210	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1211
		1212	dSP;
		1213
		1214	ENTER; SAVETMPS;
		1215	PUSHMARK (SP);
		1216	EXTEND (SP, len + 1);
		1217	// we re-bless the reference to get overload and other niceties right
		1218	PUSHs (*av_fetch (av, 0, 1));
		1219	PUSHs (sv_cbor);
		1220
		1221	int i;
		1222
		1223	for (i = 1; i < len; ++i)
		1224	PUSHs (*av_fetch (av, i, 1));
		1225
		1226	PUTBACK;
		1227	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1228	SPAGAIN;
		1229
		1230	if (SvTRUE (ERRSV))
		1231	{
		1232	FREETMPS; LEAVE;
		1233	ERR_ERRSV;
		1234	}
		1235
		1236	SvREFCNT_dec_NN (sv);
		1237	sv = SvREFCNT_inc (POPs);
		1238
		1239	PUTBACK;
		1240
		1241	FREETMPS; LEAVE;
		1242	}
		1243	break;
		1244
		1245	default:
		1246	filter:
		1247	{
		1248	SV *tag_sv = newSVuv (tag);
		1249
		1250	sv = decode_sv (dec);
		1251
		1252	dSP;
		1253	ENTER; SAVETMPS;
		1254	PUSHMARK (SP);
		1255	EXTEND (SP, 2);
		1256	PUSHs (tag_sv);
		1257	PUSHs (sv);
		1258
		1259	PUTBACK;
		1260	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1261	SPAGAIN;
		1262
		1263	if (SvTRUE (ERRSV))
		1264	{
		1265	SvREFCNT_dec_NN (tag_sv);
		1266	FREETMPS; LEAVE;
		1267	ERR_ERRSV;
		1268	}
		1269
		1270	if (count)
		1271	{
		1272	SvREFCNT_dec_NN (tag_sv);
		1273	SvREFCNT_dec_NN (sv);
		1274	sv = SvREFCNT_inc_NN (TOPs);
		1275	SP -= count;
		1276	}
		1277	else
		1278	{
		1279	AV *av = newAV ();
		1280	av_push (av, tag_sv);
		1281	av_push (av, sv);
		1282
		1283	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1284	? cbor_tagged_stash
		1285	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1286	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1287	}
		1288
		1289	PUTBACK;
		1290
		1291	FREETMPS; LEAVE;
		1292	}
		1293	break;
		1294	}
		1295
777	return sv;	1296	return sv;
778		1297
779	AV *av = newAV ();	1298	fail:
780	av_push (av, newSVuv (tag));	1299	SvREFCNT_dec (sv);
781	av_push (av, sv);	1300	return &PL_sv_undef;
782	return newRV_noinc ((SV *)av);
783	}	1301	}
784		1302
785	static SV *	1303	static SV *
786	decode_sv (dec_t *dec)	1304	decode_sv (dec_t *dec)
787	{	1305	{
788	WANT (1);	1306	WANT (1);
789		1307
790	switch (*dec->cur >> 5)	1308	switch (*dec->cur >> MAJOR_SHIFT)
791	{	1309	{
792	case 0: // unsigned int	1310	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
793	//TODO: 64 bit values on 3 2bit perls	1311	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
794	return newSVuv (decode_uint (dec));	1312	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
795	case 1: // negative int	1313	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
796	return newSViv (-1 - (IV)decode_uint (dec));	1314	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
797	case 2: // octet string	1315	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
798	return decode_str (dec, 0);	1316	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
799	case 3: // utf-8 string	1317
800	return decode_str (dec, 1);	1318	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)	1319	switch (*dec->cur++ & MINOR_MASK)
809	{	1320	{
810	case 20:	1321	case SIMPLE_FALSE:
811	#if CBOR_SLOW	1322	#if CBOR_SLOW
812	cbor_false = get_bool ("CBOR::XS::false");	1323	types_false = get_bool ("Types::Serialiser::false");
813	#endif	1324	#endif
814	return newSVsv (cbor_false);	1325	return newSVsv (types_false);
815	case 21:	1326	case SIMPLE_TRUE:
816	#if CBOR_SLOW	1327	#if CBOR_SLOW
817	cbor_true = get_bool ("CBOR::XS::true");	1328	types_true = get_bool ("Types::Serialiser::true");
818	#endif	1329	#endif
819	return newSVsv (cbor_true);	1330	return newSVsv (types_true);
820	case 22:	1331	case SIMPLE_NULL:
821	return newSVsv (&PL_sv_undef);	1332	return newSVsv (&PL_sv_undef);
		1333	case SIMPLE_UNDEF:
		1334	#if CBOR_SLOW
		1335	types_error = get_bool ("Types::Serialiser::error");
		1336	#endif
		1337	return newSVsv (types_error);
822		1338
823	case 25:	1339	case MISC_FLOAT16:
824	{	1340	{
825	WANT (2);	1341	WANT (2);
826		1342
827	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1343	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
828	dec->cur += 2;	1344	dec->cur += 2;
829		1345
830	return newSVnv (ecb_binary16_to_float (fp));	1346	return newSVnv (ecb_binary16_to_float (fp));
831	}	1347	}
832		1348
833	case 26:	1349	case MISC_FLOAT32:
834	{	1350	{
835	uint32_t fp;	1351	uint32_t fp;
836	WANT (4);	1352	WANT (4);
837	memcpy (&fp, dec->cur, 4);	1353	memcpy (&fp, dec->cur, 4);
838	dec->cur += 4;	1354	dec->cur += 4;
…		…
841	fp = ecb_bswap32 (fp);	1357	fp = ecb_bswap32 (fp);
842		1358
843	return newSVnv (ecb_binary32_to_float (fp));	1359	return newSVnv (ecb_binary32_to_float (fp));
844	}	1360	}
845		1361
846	case 27:	1362	case MISC_FLOAT64:
847	{	1363	{
848	uint64_t fp;	1364	uint64_t fp;
849	WANT (8);	1365	WANT (8);
850	memcpy (&fp, dec->cur, 8);	1366	memcpy (&fp, dec->cur, 8);
851	dec->cur += 8;	1367	dec->cur += 8;
…		…
854	fp = ecb_bswap64 (fp);	1370	fp = ecb_bswap64 (fp);
855		1371
856	return newSVnv (ecb_binary64_to_double (fp));	1372	return newSVnv (ecb_binary64_to_double (fp));
857	}	1373	}
858		1374
859	// 0..19 unassigned	1375	// 0..19 unassigned simple
860	// 24 reserved + unassigned (reserved values are not encodable)	1376	// 24 reserved + unassigned simple (reserved values are not encodable)
		1377	// 28-30 unassigned misc
		1378	// 31 break code
861	default:	1379	default:
862	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1380	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
863	}	1381	}
864		1382
865	break;	1383	break;
866	}	1384	}
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		1385
924	fail:	1386	fail:
925	return &PL_sv_undef;	1387	return &PL_sv_undef;
926	}	1388	}
927		1389
928	static SV *	1390	static SV *
929	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1391	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
930	{	1392	{
931	dec_t dec;	1393	dec_t dec = { 0 };
932	SV *sv;	1394	SV *sv;
		1395	STRLEN len;
		1396	char *data = SvPVbyte (string, len);
933		1397
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)	1398	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",	1399	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);	1400	(unsigned long)len, (unsigned long)cbor->max_size);
965	}
966
967	sv_utf8_downgrade (string, 0);
968		1401
969	dec.cbor = *cbor;	1402	dec.cbor = *cbor;
970	dec.cur = (U8 *)SvPVX (string);	1403	dec.cur = (U8 *)data;
971	dec.end = (U8 *)SvEND (string);	1404	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		1405
978	sv = decode_sv (&dec);	1406	sv = decode_sv (&dec);
979		1407
980	if (offset_return)	1408	if (offset_return)
981	*offset_return = dec.cur;	1409	*offset_return = dec.cur;
…		…
984	if (dec.cur != dec.end && !dec.err)	1412	if (dec.cur != dec.end && !dec.err)
985	dec.err = "garbage after CBOR object";	1413	dec.err = "garbage after CBOR object";
986		1414
987	if (dec.err)	1415	if (dec.err)
988	{	1416	{
		1417	if (dec.shareable)
		1418	{
		1419	// need to break cyclic links, which would all be in shareable
		1420	int i;
		1421	SV **svp;
		1422
		1423	for (i = av_len (dec.shareable) + 1; i--; )
		1424	if ((svp = av_fetch (dec.shareable, i, 0)))
		1425	sv_setsv (*svp, &PL_sv_undef);
		1426	}
		1427
989	SvREFCNT_dec (sv);	1428	SvREFCNT_dec_NN (sv);
		1429
		1430	if (dec.err_sv)
		1431	sv_2mortal (dec.err_sv);
		1432
990	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1433	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
991	}	1434	}
992		1435
993	sv = sv_2mortal (sv);	1436	sv = sv_2mortal (sv);
994		1437
995	return sv;	1438	return sv;
996	}	1439	}
997		1440
		1441	/////////////////////////////////////////////////////////////////////////////
		1442	// incremental parser
		1443
		1444	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1445
		1446	// returns 0 for notyet, 1 for success or error
		1447	static int
		1448	incr_parse (CBOR *self, SV *cborstr)
		1449	{
		1450	STRLEN cur;
		1451	SvPV (cborstr, cur);
		1452
		1453	while (ecb_expect_true (self->incr_need <= cur))
		1454	{
		1455	// table of integer count bytes
		1456	static I8 incr_len[MINOR_MASK + 1] = {
		1457	0, 0, 0, 0, 0, 0, 0, 0,
		1458	0, 0, 0, 0, 0, 0, 0, 0,
		1459	0, 0, 0, 0, 0, 0, 0, 0,
		1460	1, 2, 4, 8,-1,-1,-1,-2
		1461	};
		1462
		1463	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1464	U8 m = *p & MINOR_MASK;
		1465	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1466	I8 ilen = incr_len[m];
		1467
		1468	self->incr_need = self->incr_pos + 1;
		1469
		1470	if (ecb_expect_false (ilen < 0))
		1471	{
		1472	if (m != MINOR_INDEF)
		1473	return 1; // error
		1474
		1475	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1476	{
		1477	if (count >= 0)
		1478	return 1; // error
		1479
		1480	count = 1;
		1481	}
		1482	else
		1483	{
		1484	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1485	count = -1;
		1486	}
		1487	}
		1488	else
		1489	{
		1490	self->incr_need += ilen;
		1491	if (ecb_expect_false (self->incr_need > cur))
		1492	return 0;
		1493
		1494	int major = *p >> MAJOR_SHIFT;
		1495
		1496	switch (major)
		1497	{
		1498	case MAJOR_TAG >> MAJOR_SHIFT:
		1499	++count; // tags merely prefix another value
		1500	break;
		1501
		1502	case MAJOR_BYTES >> MAJOR_SHIFT:
		1503	case MAJOR_TEXT >> MAJOR_SHIFT:
		1504	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1505	case MAJOR_MAP >> MAJOR_SHIFT:
		1506	{
		1507	UV len;
		1508
		1509	if (ecb_expect_false (ilen))
		1510	{
		1511	len = 0;
		1512
		1513	do {
		1514	len = (len << 8) | *++p;
		1515	} while (--ilen);
		1516	}
		1517	else
		1518	len = m;
		1519
		1520	switch (major)
		1521	{
		1522	case MAJOR_BYTES >> MAJOR_SHIFT:
		1523	case MAJOR_TEXT >> MAJOR_SHIFT:
		1524	self->incr_need += len;
		1525	if (ecb_expect_false (self->incr_need > cur))
		1526	return 0;
		1527
		1528	break;
		1529
		1530	case MAJOR_MAP >> MAJOR_SHIFT:
		1531	len <<= 1;
		1532	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1533	if (len)
		1534	{
		1535	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1536	count = len + 1;
		1537	}
		1538	break;
		1539	}
		1540	}
		1541	}
		1542	}
		1543
		1544	self->incr_pos = self->incr_need;
		1545
		1546	if (count > 0)
		1547	{
		1548	while (!--count)
		1549	{
		1550	if (!AvFILLp (self->incr_count))
		1551	return 1; // done
		1552
		1553	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1554	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1555	}
		1556
		1557	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1558	}
		1559	}
		1560
		1561	return 0;
		1562	}
		1563
		1564
998	/////////////////////////////////////////////////////////////////////////////	1565	/////////////////////////////////////////////////////////////////////////////
999	// XS interface functions	1566	// XS interface functions
1000		1567
1001	MODULE = CBOR::XS PACKAGE = CBOR::XS	1568	MODULE = CBOR::XS PACKAGE = CBOR::XS
1002		1569
1003	BOOT:	1570	BOOT:
1004	{	1571	{
1005	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1572	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1006	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1573	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1007		1574
1008	cbor_true = get_bool ("CBOR::XS::true");	1575	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1009	cbor_false = get_bool ("CBOR::XS::false");	1576	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1577
		1578	types_true = get_bool ("Types::Serialiser::true" );
		1579	types_false = get_bool ("Types::Serialiser::false");
		1580	types_error = get_bool ("Types::Serialiser::error");
		1581
		1582	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1583
		1584	sv_cbor = newSVpv ("CBOR", 0);
		1585	SvREADONLY_on (sv_cbor);
		1586
		1587	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
1010	}	1588	}
1011		1589
1012	PROTOTYPES: DISABLE	1590	PROTOTYPES: DISABLE
1013		1591
1014	void CLONE (...)	1592	void CLONE (...)
1015	CODE:	1593	CODE:
1016	cbor_stash = 0;	1594	cbor_stash = 0;
		1595	cbor_tagged_stash = 0;
		1596	types_error_stash = 0;
1017	cbor_boolean_stash = 0;	1597	types_boolean_stash = 0;
1018		1598
1019	void new (char *klass)	1599	void new (char *klass)
1020	PPCODE:	1600	PPCODE:
1021	{	1601	{
1022	SV *pv = NEWSV (0, sizeof (CBOR));	1602	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1030		1610
1031	void shrink (CBOR *self, int enable = 1)	1611	void shrink (CBOR *self, int enable = 1)
1032	ALIAS:	1612	ALIAS:
1033	shrink = F_SHRINK	1613	shrink = F_SHRINK
1034	allow_unknown = F_ALLOW_UNKNOWN	1614	allow_unknown = F_ALLOW_UNKNOWN
		1615	allow_sharing = F_ALLOW_SHARING
		1616	allow_cycles = F_ALLOW_CYCLES
		1617	forbid_objects = F_FORBID_OBJECTS
		1618	pack_strings = F_PACK_STRINGS
		1619	text_keys = F_TEXT_KEYS
		1620	text_strings = F_TEXT_STRINGS
		1621	validate_utf8 = F_VALIDATE_UTF8
1035	PPCODE:	1622	PPCODE:
1036	{	1623	{
1037	if (enable)	1624	if (enable)
1038	self->flags |= ix;	1625	self->flags |= ix;
1039	else	1626	else
…		…
1044		1631
1045	void get_shrink (CBOR *self)	1632	void get_shrink (CBOR *self)
1046	ALIAS:	1633	ALIAS:
1047	get_shrink = F_SHRINK	1634	get_shrink = F_SHRINK
1048	get_allow_unknown = F_ALLOW_UNKNOWN	1635	get_allow_unknown = F_ALLOW_UNKNOWN
		1636	get_allow_sharing = F_ALLOW_SHARING
		1637	get_allow_cycles = F_ALLOW_CYCLES
		1638	get_forbid_objects = F_FORBID_OBJECTS
		1639	get_pack_strings = F_PACK_STRINGS
		1640	get_text_keys = F_TEXT_KEYS
		1641	get_text_strings = F_TEXT_STRINGS
		1642	get_validate_utf8 = F_VALIDATE_UTF8
1049	PPCODE:	1643	PPCODE:
1050	XPUSHs (boolSV (self->flags & ix));	1644	XPUSHs (boolSV (self->flags & ix));
1051		1645
1052	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1646	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1053	PPCODE:	1647	PPCODE:
…		…
1069	CODE:	1663	CODE:
1070	RETVAL = self->max_size;	1664	RETVAL = self->max_size;
1071	OUTPUT:	1665	OUTPUT:
1072	RETVAL	1666	RETVAL
1073		1667
1074	#if 0 //TODO	1668	void filter (CBOR *self, SV *filter = 0)
1075
1076	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1077	PPCODE:	1669	PPCODE:
1078	{
1079	SvREFCNT_dec (self->cb_object);	1670	SvREFCNT_dec (self->filter);
1080	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1671	self->filter = filter ? newSVsv (filter) : filter;
1081
1082	XPUSHs (ST (0));	1672	XPUSHs (ST (0));
1083	}
1084		1673
1085	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1674	SV *get_filter (CBOR *self)
1086	PPCODE:	1675	CODE:
1087	{	1676	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1088	if (!self->cb_sk_object)	1677	OUTPUT:
1089	self->cb_sk_object = newHV ();	1678	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		1679
1109	void encode (CBOR *self, SV *scalar)	1680	void encode (CBOR *self, SV *scalar)
1110	PPCODE:	1681	PPCODE:
1111	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1682	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1112	XPUSHs (scalar);	1683	XPUSHs (scalar);
…		…
1125	EXTEND (SP, 2);	1696	EXTEND (SP, 2);
1126	PUSHs (sv);	1697	PUSHs (sv);
1127	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1698	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1128	}	1699	}
1129		1700
		1701	void incr_parse (CBOR *self, SV *cborstr)
		1702	ALIAS:
		1703	incr_parse_multiple = 1
		1704	PPCODE:
		1705	{
		1706	if (SvUTF8 (cborstr))
		1707	sv_utf8_downgrade (cborstr, 0);
		1708
		1709	if (!self->incr_count)
		1710	{
		1711	self->incr_count = newAV ();
		1712	self->incr_pos = 0;
		1713	self->incr_need = 1;
		1714
		1715	av_push (self->incr_count, newSViv (1));
		1716	}
		1717
		1718	do
		1719	{
		1720	if (!incr_parse (self, cborstr))
		1721	{
		1722	if (self->incr_need > self->max_size && self->max_size)
		1723	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1724	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1725
		1726	break;
		1727	}
		1728
		1729	SV *sv;
		1730	char *offset;
		1731
		1732	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1733	XPUSHs (sv);
		1734
		1735	sv_chop (cborstr, offset);
		1736
		1737	av_clear (self->incr_count);
		1738	av_push (self->incr_count, newSViv (1));
		1739
		1740	self->incr_pos = 0;
		1741	self->incr_need = self->incr_pos + 1;
		1742	}
		1743	while (ix);
		1744	}
		1745
		1746	void incr_reset (CBOR *self)
		1747	CODE:
		1748	{
		1749	SvREFCNT_dec (self->incr_count);
		1750	self->incr_count = 0;
		1751	}
		1752
1130	void DESTROY (CBOR *self)	1753	void DESTROY (CBOR *self)
1131	CODE:	1754	PPCODE:
1132	SvREFCNT_dec (self->cb_sk_object);	1755	cbor_free (self);
1133	SvREFCNT_dec (self->cb_object);
1134		1756
1135	PROTOTYPES: ENABLE	1757	PROTOTYPES: ENABLE
1136		1758
1137	void encode_cbor (SV *scalar)	1759	void encode_cbor (SV *scalar)
		1760	ALIAS:
		1761	encode_cbor = 0
		1762	encode_cbor_sharing = F_ALLOW_SHARING
1138	PPCODE:	1763	PPCODE:
1139	{	1764	{
1140	CBOR cbor;	1765	CBOR cbor;
1141	cbor_init (&cbor);	1766	cbor_init (&cbor);
		1767	cbor.flags |= ix;
1142	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1768	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1143	XPUSHs (scalar);	1769	XPUSHs (scalar);
1144	}	1770	}
1145		1771
1146	void decode_cbor (SV *cborstr)	1772	void decode_cbor (SV *cborstr)
…		…
1150	cbor_init (&cbor);	1776	cbor_init (&cbor);
1151	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1777	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1152	XPUSHs (cborstr);	1778	XPUSHs (cborstr);
1153	}	1779	}
1154		1780
		1781	#ifdef __AFL_COMPILER
		1782
		1783	void
		1784	afl_init ()
		1785	CODE:
		1786	__AFL_INIT ();
		1787
		1788	int
		1789	afl_loop (unsigned int count = 10000)
		1790	CODE:
		1791	RETVAL = __AFL_LOOP (count);
		1792	OUTPUT:
		1793	RETVAL
		1794
		1795	#endif
		1796

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