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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.7 by root, Sat Oct 26 23:02:55 2013 UTC vs.
Revision 1.80 by root, Fri Sep 8 20:03:06 2023 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	// perl's is_utf8_string interprets len=0 as "calculate len", but we want it to mean 0
		34	#define cbor_is_utf8_string(str,len) (!(len) || is_utf8_string ((str), (len)))
		35
		36	// known major and minor types
		37	enum cbor_type
		38	{
		39	MAJOR_SHIFT = 5,
		40	MINOR_MASK = 0x1f,
		41
		42	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		43	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		44	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		45	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		46	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		47	MAJOR_MAP = 5 << MAJOR_SHIFT,
		48	MAJOR_TAG = 6 << MAJOR_SHIFT,
		49	MAJOR_MISC = 7 << MAJOR_SHIFT,
		50
		51	// INT/STRING/ARRAY/MAP subtypes
		52	LENGTH_EXT1 = 24,
		53	LENGTH_EXT2 = 25,
		54	LENGTH_EXT4 = 26,
		55	LENGTH_EXT8 = 27,
		56
		57	// SIMPLE types (effectively MISC subtypes)
		58	SIMPLE_FALSE = 20,
		59	SIMPLE_TRUE = 21,
		60	SIMPLE_NULL = 22,
		61	SIMPLE_UNDEF = 23,
		62
		63	// MISC subtype (unused)
		64	MISC_EXT1 = 24,
		65	MISC_FLOAT16 = 25,
		66	MISC_FLOAT32 = 26,
		67	MISC_FLOAT64 = 27,
		68
		69	// BYTES/TEXT/ARRAY/MAP
		70	MINOR_INDEF = 31,
		71	};
		72
		73	// known tags
		74	enum cbor_tag
		75	{
		76	// extensions
		77	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
		78	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
		79	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
		80	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
		81	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
		82	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
		83	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
		84
		85	// rfc7049
		86	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
		87	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
		88	CBOR_TAG_POS_BIGNUM = 2, // byte string
		89	CBOR_TAG_NEG_BIGNUM = 3, // byte string
		90	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
		91	CBOR_TAG_BIGFLOAT = 5, // array
		92
		93	CBOR_TAG_CONV_B64U = 21, // base64url, any
		94	CBOR_TAG_CONV_B64 = 22, // base64, any
		95	CBOR_TAG_CONV_HEX = 23, // base16, any
		96	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
		97
		98	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
		99	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
		100	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
		101	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
		102	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
		103
		104	CBOR_TAG_MAGIC = 55799, // self-describe cbor
		105	};
		106
		107	// known forced types, also hardcoded in CBOR.pm
		108	enum
		109	{
		110	AS_CBOR = 0,
		111	AS_INT = 1,
		112	AS_BYTES = 2,
		113	AS_TEXT = 3,
		114	AS_FLOAT16 = 4,
		115	AS_FLOAT32 = 5,
		116	AS_FLOAT64 = 6,
		117	AS_MAP = 7,
		118	// possibly future enhancements: (generic) float, (generic) string
		119	};
		120
14	#define F_SHRINK 0x00000200UL	121	#define F_SHRINK 0x00000001UL
15	#define F_ALLOW_UNKNOWN 0x00002000UL	122	#define F_ALLOW_UNKNOWN 0x00000002UL
		123	#define F_ALLOW_SHARING 0x00000004UL
		124	#define F_ALLOW_CYCLES 0x00000008UL
		125	#define F_ALLOW_WEAK_CYCLES 0x00000010UL
		126	#define F_FORBID_OBJECTS 0x00000020UL
		127	#define F_PACK_STRINGS 0x00000040UL
		128	#define F_TEXT_KEYS 0x00000080UL
		129	#define F_TEXT_STRINGS 0x00000100UL
		130	#define F_VALIDATE_UTF8 0x00000200UL
16		131
17	#define INIT_SIZE 32 // initial scalar size to be allocated	132	#define INIT_SIZE 32 // initial scalar size to be allocated
18		133
19	#define SB do {	134	#define SB do {
20	#define SE } while (0)	135	#define SE } while (0)
…		…
31	#else	146	#else
32	# define CBOR_SLOW 0	147	# define CBOR_SLOW 0
33	# define CBOR_STASH cbor_stash	148	# define CBOR_STASH cbor_stash
34	#endif	149	#endif
35		150
36	static HV *cbor_stash, *cbor_boolean_stash, *cbor_tagged_stash; // CBOR::XS::	151	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
37	static SV *cbor_true, *cbor_false;	152	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
38		153
39	typedef struct {	154	typedef struct {
40	U32 flags;	155	U32 flags;
41	U32 max_depth;	156	U32 max_depth;
42	STRLEN max_size;	157	STRLEN max_size;
		158	SV *filter;
		159
		160	// for the incremental parser
		161	STRLEN incr_pos; // the current offset into the text
		162	STRLEN incr_need; // minimum bytes needed to decode
		163	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
43	} CBOR;	164	} CBOR;
44		165
45	ecb_inline void	166	ecb_inline void
46	cbor_init (CBOR *cbor)	167	cbor_init (CBOR *cbor)
47	{	168	{
48	Zero (cbor, 1, CBOR);	169	Zero (cbor, 1, CBOR);
49	cbor->max_depth = 512;	170	cbor->max_depth = 512;
		171	}
		172
		173	ecb_inline void
		174	cbor_free (CBOR *cbor)
		175	{
		176	SvREFCNT_dec (cbor->filter);
		177	SvREFCNT_dec (cbor->incr_count);
50	}	178	}
51		179
52	/////////////////////////////////////////////////////////////////////////////	180	/////////////////////////////////////////////////////////////////////////////
53	// utility functions	181	// utility functions
54		182
…		…
76	SvPV_renew (sv, SvCUR (sv) + 1);	204	SvPV_renew (sv, SvCUR (sv) + 1);
77	#endif	205	#endif
78	}	206	}
79	}	207	}
80		208
81	/////////////////////////////////////////////////////////////////////////////	209	// minimum length of a string to be registered for stringref
82	// fp hell	210	ecb_inline STRLEN
83		211	minimum_string_length (UV idx)
84	//TODO	212	{
		213	return idx <= 23 ? 3
		214	: idx <= 0xffU ? 4
		215	: idx <= 0xffffU ? 5
		216	: idx <= 0xffffffffU ? 7
		217	: 11;
		218	}
85		219
86	/////////////////////////////////////////////////////////////////////////////	220	/////////////////////////////////////////////////////////////////////////////
87	// encoder	221	// encoder
88		222
89	// structure used for encoding CBOR	223	// structure used for encoding CBOR
…		…
92	char *cur; // SvPVX (sv) + current output position	226	char *cur; // SvPVX (sv) + current output position
93	char *end; // SvEND (sv)	227	char *end; // SvEND (sv)
94	SV *sv; // result scalar	228	SV *sv; // result scalar
95	CBOR cbor;	229	CBOR cbor;
96	U32 depth; // recursion level	230	U32 depth; // recursion level
		231	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		232	UV stringref_idx;
		233	HV *shareable; // ptr => index, or 0
		234	UV shareable_idx;
97	} enc_t;	235	} enc_t;
98		236
99	ecb_inline void	237	ecb_inline void
100	need (enc_t *enc, STRLEN len)	238	need (enc_t *enc, STRLEN len)
101	{	239	{
102	if (ecb_expect_false (enc->cur + len >= enc->end))	240	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
103	{	241	{
104	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	242	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
105	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	243	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
106	enc->cur = SvPVX (enc->sv) + cur;	244	enc->cur = SvPVX (enc->sv) + cur;
107	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	245	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
108	}	246	}
109	}	247	}
110		248
		249	static void encode_sv (enc_t *enc, SV *sv);
		250
111	ecb_inline void	251	ecb_inline void
112	encode_ch (enc_t *enc, char ch)	252	encode_ch (enc_t *enc, char ch)
113	{	253	{
114	need (enc, 1);	254	need (enc, 1);
115	*enc->cur++ = ch;	255	*enc->cur++ = ch;
116	}	256	}
117		257
		258	// used for tags, intregers, element counts and so on
118	static void	259	static void
119	encode_uint (enc_t *enc, int major, UV len)	260	encode_uint (enc_t *enc, int major, UV len)
120	{	261	{
121	need (enc, 9);	262	need (enc, 9);
122		263
123	if (len < 24)	264	if (ecb_expect_true (len < LENGTH_EXT1))
124	*enc->cur++ = major | len;	265	*enc->cur++ = major | len;
125	else if (len <= 0xff)	266	else if (ecb_expect_true (len <= 0xffU))
126	{	267	{
127	*enc->cur++ = major | 24;	268	*enc->cur++ = major | LENGTH_EXT1;
128	*enc->cur++ = len;	269	*enc->cur++ = len;
129	}	270	}
130	else if (len <= 0xffff)	271	else if (len <= 0xffffU)
131	{	272	{
132	*enc->cur++ = major | 25;	273	*enc->cur++ = major | LENGTH_EXT2;
133	*enc->cur++ = len >> 8;	274	*enc->cur++ = len >> 8;
134	*enc->cur++ = len;	275	*enc->cur++ = len;
135	}	276	}
136	else if (len <= 0xffffffff)	277	else if (len <= 0xffffffffU)
137	{	278	{
138	*enc->cur++ = major | 26;	279	*enc->cur++ = major | LENGTH_EXT4;
139	*enc->cur++ = len >> 24;	280	*enc->cur++ = len >> 24;
140	*enc->cur++ = len >> 16;	281	*enc->cur++ = len >> 16;
141	*enc->cur++ = len >> 8;	282	*enc->cur++ = len >> 8;
142	*enc->cur++ = len;	283	*enc->cur++ = len;
143	}	284	}
144	else	285	else
145	{	286	{
146	*enc->cur++ = major | 27;	287	*enc->cur++ = major | LENGTH_EXT8;
147	*enc->cur++ = len >> 56;	288	*enc->cur++ = len >> 56;
148	*enc->cur++ = len >> 48;	289	*enc->cur++ = len >> 48;
149	*enc->cur++ = len >> 40;	290	*enc->cur++ = len >> 40;
150	*enc->cur++ = len >> 32;	291	*enc->cur++ = len >> 32;
151	*enc->cur++ = len >> 24;	292	*enc->cur++ = len >> 24;
…		…
153	*enc->cur++ = len >> 8;	294	*enc->cur++ = len >> 8;
154	*enc->cur++ = len;	295	*enc->cur++ = len;
155	}	296	}
156	}	297	}
157		298
158	static void	299	// encodes a perl value into a CBOR integer
		300	ecb_inline void
		301	encode_int (enc_t *enc, SV *sv)
		302	{
		303	if (SvIsUV (sv))
		304	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
		305	else if (SvIVX (sv) >= 0)
		306	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
		307	else
		308	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
		309	}
		310
		311	ecb_inline void
		312	encode_tag (enc_t *enc, UV tag)
		313	{
		314	encode_uint (enc, MAJOR_TAG, tag);
		315	}
		316
		317	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		318	ecb_noinline static void
159	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	319	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
160	{	320	{
161	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	321	STRLEN ulen = len;
		322	U8 *p, *pend = (U8 *)str + len;
		323
		324	for (p = (U8 *)str; p < pend; ++p)
		325	ulen += *p >> 7; // count set high bits
		326
		327	encode_uint (enc, MAJOR_TEXT, ulen);
		328
		329	need (enc, ulen);
		330	for (p = (U8 *)str; p < pend; ++p)
		331	if (*p < 0x80)
		332	*enc->cur++ = *p;
		333	else
		334	{
		335	*enc->cur++ = 0xc0 + (*p >> 6);
		336	*enc->cur++ = 0x80 + (*p & 63);
		337	}
		338	}
		339
		340	ecb_inline void
		341	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		342	{
		343	if (ecb_expect_false (upgrade_utf8))
		344	if (!utf8)
		345	{
		346	encode_str_utf8 (enc, utf8, str, len);
		347	return;
		348	}
		349
		350	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
162	need (enc, len);	351	need (enc, len);
163	memcpy (enc->cur, str, len);	352	memcpy (enc->cur, str, len);
164	enc->cur += len;	353	enc->cur += len;
165	}	354	}
166		355
167	static void encode_sv (enc_t *enc, SV *sv);	356	ecb_inline void
		357	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		358	{
		359	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		360	{
		361	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		362
		363	if (SvOK (*svp))
		364	{
		365	// already registered, use stringref
		366	encode_tag (enc, CBOR_TAG_STRINGREF);
		367	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		368	return;
		369	}
		370	else if (len >= minimum_string_length (enc->stringref_idx))
		371	{
		372	// register only
		373	sv_setuv (*svp, enc->stringref_idx);
		374	++enc->stringref_idx;
		375	}
		376	}
		377
		378	encode_str (enc, upgrade_utf8, utf8, str, len);
		379	}
		380
		381	ecb_inline void
		382	encode_float16 (enc_t *enc, NV nv)
		383	{
		384	need (enc, 1+2);
		385
		386	*enc->cur++ = MAJOR_MISC | MISC_FLOAT16;
		387
		388	uint16_t fp = ecb_float_to_binary16 (nv);
		389
		390	if (!ecb_big_endian ())
		391	fp = ecb_bswap16 (fp);
		392
		393	memcpy (enc->cur, &fp, 2);
		394	enc->cur += 2;
		395	}
		396
		397	ecb_inline void
		398	encode_float32 (enc_t *enc, NV nv)
		399	{
		400	need (enc, 1+4);
		401
		402	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
		403
		404	uint32_t fp = ecb_float_to_binary32 (nv);
		405
		406	if (!ecb_big_endian ())
		407	fp = ecb_bswap32 (fp);
		408
		409	memcpy (enc->cur, &fp, 4);
		410	enc->cur += 4;
		411	}
		412
		413	ecb_inline void
		414	encode_float64 (enc_t *enc, NV nv)
		415	{
		416	need (enc, 1+8);
		417
		418	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
		419
		420	uint64_t fp = ecb_double_to_binary64 (nv);
		421
		422	if (!ecb_big_endian ())
		423	fp = ecb_bswap64 (fp);
		424
		425	memcpy (enc->cur, &fp, 8);
		426	enc->cur += 8;
		427	}
		428
		429	ecb_inline void
		430	encode_bool (enc_t *enc, int istrue)
		431	{
		432	encode_ch (enc, istrue ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		433	}
		434
		435	// encodes an arrayref containing key-value pairs as CBOR map
		436	ecb_inline void
		437	encode_array_as_map (enc_t *enc, SV *sv)
		438	{
		439	if (enc->depth >= enc->cbor.max_depth)
		440	croak (ERR_NESTING_EXCEEDED);
		441
		442	++enc->depth;
		443
		444	// as_map does error checking for us, but we re-check in case
		445	// things have changed.
		446
		447	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		448	croak ("CBOR::XS::as_map requires an array reference (did you change the array after calling as_map?)");
		449
		450	AV *av = (AV *)SvRV (sv);
		451	int i, len = av_len (av);
		452
		453	if (!(len & 1))
		454	croak ("CBOR::XS::as_map requires an even number of elements (did you change the array after calling as_map?)");
		455
		456	encode_uint (enc, MAJOR_MAP, (len + 1) >> 1);
		457
		458	for (i = 0; i <= len; ++i)
		459	{
		460	SV **svp = av_fetch (av, i, 0);
		461	encode_sv (enc, svp ? *svp : &PL_sv_undef);
		462	}
		463
		464	--enc->depth;
		465	}
		466
		467	ecb_inline void
		468	encode_forced (enc_t *enc, UV type, SV *sv)
		469	{
		470	switch (type)
		471	{
		472	case AS_CBOR:
		473	{
		474	STRLEN len;
		475	char *str = SvPVbyte (sv, len);
		476
		477	need (enc, len);
		478	memcpy (enc->cur, str, len);
		479	enc->cur += len;
		480	}
		481	break;
		482
		483	case AS_BYTES:
		484	{
		485	STRLEN len;
		486	char *str = SvPVbyte (sv, len);
		487	encode_strref (enc, 0, 0, str, len);
		488	}
		489	break;
		490
		491	case AS_TEXT:
		492	{
		493	STRLEN len;
		494	char *str = SvPVutf8 (sv, len);
		495	encode_strref (enc, 1, 1, str, len);
		496	}
		497	break;
		498
		499	case AS_INT: encode_int (enc, sv); break;
		500
		501	case AS_FLOAT16: encode_float16 (enc, SvNV (sv)); break;
		502	case AS_FLOAT32: encode_float32 (enc, SvNV (sv)); break;
		503	case AS_FLOAT64: encode_float64 (enc, SvNV (sv)); break;
		504
		505	case AS_MAP: encode_array_as_map (enc, sv); break;
		506
		507	default:
		508	croak ("encountered malformed CBOR::XS::Tagged object");
		509	}
		510	}
168		511
169	static void	512	static void
170	encode_av (enc_t *enc, AV *av)	513	encode_av (enc_t *enc, AV *av)
171	{	514	{
172	int i, len = av_len (av);	515	int i, len = av_len (av);
…		…
174	if (enc->depth >= enc->cbor.max_depth)	517	if (enc->depth >= enc->cbor.max_depth)
175	croak (ERR_NESTING_EXCEEDED);	518	croak (ERR_NESTING_EXCEEDED);
176		519
177	++enc->depth;	520	++enc->depth;
178		521
179	encode_uint (enc, 0x80, len + 1);	522	encode_uint (enc, MAJOR_ARRAY, len + 1);
180		523
		524	if (ecb_expect_false (SvMAGICAL (av)))
181	for (i = 0; i <= len; ++i)	525	for (i = 0; i <= len; ++i)
182	{	526	{
183	SV **svp = av_fetch (av, i, 0);	527	SV **svp = av_fetch (av, i, 0);
184	encode_sv (enc, svp ? *svp : &PL_sv_undef);	528	encode_sv (enc, svp ? *svp : &PL_sv_undef);
185	}	529	}
		530	else
		531	for (i = 0; i <= len; ++i)
		532	{
		533	SV *sv = AvARRAY (av)[i];
		534	encode_sv (enc, sv ? sv : &PL_sv_undef);
		535	}
186		536
187	--enc->depth;	537	--enc->depth;
188	}	538	}
189		539
190	static void	540	static void
…		…
198	++enc->depth;	548	++enc->depth;
199		549
200	int pairs = hv_iterinit (hv);	550	int pairs = hv_iterinit (hv);
201	int mg = SvMAGICAL (hv);	551	int mg = SvMAGICAL (hv);
202		552
203	if (mg)	553	if (ecb_expect_false (mg))
204	encode_ch (enc, 0xa0 | 31);	554	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
205	else	555	else
206	encode_uint (enc, 0xa0, pairs);	556	encode_uint (enc, MAJOR_MAP, pairs);
207		557
208	while ((he = hv_iternext (hv)))	558	while ((he = hv_iternext (hv)))
209	{	559	{
210	if (HeKLEN (he) == HEf_SVKEY)	560	if (HeKLEN (he) == HEf_SVKEY)
211	encode_sv (enc, HeSVKEY (he));	561	encode_sv (enc, HeSVKEY (he));
212	else	562	else
213	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	563	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
214		564
215	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	565	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
216	}	566	}
217		567
218	if (mg)	568	if (ecb_expect_false (mg))
219	encode_ch (enc, 0xe0 | 31);	569	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
220		570
221	--enc->depth;	571	--enc->depth;
222	}	572	}
223		573
224	// encode objects, arrays and special \0=false and \1=true values.	574	// encode objects, arrays and special \0=false and \1=true values.
225	static void	575	static void
226	encode_rv (enc_t *enc, SV *sv)	576	encode_rv (enc_t *enc, SV *sv)
227	{	577	{
228	svtype svt;
229
230	SvGETMAGIC (sv);	578	SvGETMAGIC (sv);
		579
231	svt = SvTYPE (sv);	580	svtype svt = SvTYPE (sv);
232		581
233	if (ecb_expect_false (SvOBJECT (sv)))	582	if (ecb_expect_false (SvOBJECT (sv)))
234	{	583	{
235	HV *boolean_stash = !CBOR_SLOW || cbor_boolean_stash	584	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
236	? cbor_boolean_stash	585	? types_boolean_stash
237	: gv_stashpv ("CBOR::XS::Boolean", 1);	586	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		587	HV *error_stash = !CBOR_SLOW || types_error_stash
		588	? types_error_stash
		589	: gv_stashpv ("Types::Serialiser::Error", 1);
238	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	590	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
239	? cbor_tagged_stash	591	? cbor_tagged_stash
240	: gv_stashpv ("CBOR::XS::Tagged" , 1);	592	: gv_stashpv ("CBOR::XS::Tagged" , 1);
241		593
		594	HV *stash = SvSTASH (sv);
		595
242	if (SvSTASH (sv) == boolean_stash)	596	if (stash == boolean_stash)
243	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	597	{
		598	encode_bool (enc, SvIV (sv));
		599	return;
		600	}
		601	else if (stash == error_stash)
		602	{
		603	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		604	return;
		605	}
244	else if (SvSTASH (sv) == tagged_stash)	606	else if (stash == tagged_stash)
245	{	607	{
246	if (svt != SVt_PVAV)	608	if (svt != SVt_PVAV)
247	croak ("encountered CBOR::XS::Tagged object that isn't an array");	609	croak ("encountered CBOR::XS::Tagged object that isn't an array");
248		610
		611	switch (av_len ((AV *)sv))
		612	{
		613	case 2-1:
		614	// actually a tagged value
249	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	615	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
250	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));	616	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		617	break;
		618
		619	case 3-1:
		620	// a forced type [value, type, undef]
		621	encode_forced (enc, SvUV (*av_fetch ((AV *)sv, 1, 1)), *av_fetch ((AV *)sv, 0, 1));
		622	break;
		623
		624	default:
		625	croak ("encountered malformed CBOR::XS::Tagged object");
		626	}
		627
		628	return;
		629	}
		630	}
		631
		632	if (ecb_expect_false (SvREFCNT (sv) > 1)
		633	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		634	{
		635	if (ecb_expect_false (!enc->shareable))
		636	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		637
		638	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		639
		640	if (SvOK (*svp))
		641	{
		642	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		643	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		644	return;
251	}	645	}
252	else	646	else
253	{	647	{
		648	sv_setuv (*svp, enc->shareable_idx);
		649	++enc->shareable_idx;
		650	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		651	}
		652	}
		653
		654	if (ecb_expect_false (SvOBJECT (sv)))
		655	{
		656	HV *stash = SvSTASH (sv);
		657	GV *method;
		658
		659	if (enc->cbor.flags & F_FORBID_OBJECTS)
		660	croak ("encountered object '%s', but forbid_objects is enabled",
		661	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		662	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
		663	{
		664	dSP;
		665
		666	ENTER; SAVETMPS;
		667	PUSHMARK (SP);
254	// we re-bless the reference to get overload and other niceties right	668	// we re-bless the reference to get overload and other niceties right
255	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
256
257	if (to_cbor)
258	{
259	dSP;
260
261	ENTER; SAVETMPS; PUSHMARK (SP);
262	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	669	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
263		670
264	// calling with G_SCALAR ensures that we always get a 1 return value
265	PUTBACK;	671	PUTBACK;
		672	// G_SCALAR ensures that return value is 1
266	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	673	call_sv ((SV *)GvCV (method), G_SCALAR);
267	SPAGAIN;	674	SPAGAIN;
268		675
269	// catch this surprisingly common error	676	// catch this surprisingly common error
270	if (SvROK (TOPs) && SvRV (TOPs) == sv)	677	if (SvROK (TOPs) && SvRV (TOPs) == sv)
271	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	678	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
272		679
273	sv = POPs;	680	encode_sv (enc, POPs);
		681
274	PUTBACK;	682	PUTBACK;
275		683
276	encode_sv (enc, sv);
277
278	FREETMPS; LEAVE;	684	FREETMPS; LEAVE;
		685	}
		686	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
		687	{
		688	dSP;
		689
		690	ENTER; SAVETMPS;
		691	PUSHMARK (SP);
		692	EXTEND (SP, 2);
		693	// we re-bless the reference to get overload and other niceties right
		694	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		695	PUSHs (sv_cbor);
		696
		697	PUTBACK;
		698	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		699	SPAGAIN;
		700
		701	// catch this surprisingly common error
		702	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		703	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		704
		705	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		706	encode_uint (enc, MAJOR_ARRAY, count + 1);
		707	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		708
		709	{
		710	int i;
		711
		712	for (i = 0; i < count; ++i)
		713	encode_sv (enc, SP[i + 1 - count]);
		714
		715	SP -= count;
279	}	716	}
		717
		718	PUTBACK;
		719
		720	FREETMPS; LEAVE;
		721	}
280	else	722	else
281	croak ("encountered object '%s', but no TO_CBOR method available on it",	723	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
282	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	724	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
283	}
284	}	725	}
285	else if (svt == SVt_PVHV)	726	else if (svt == SVt_PVHV)
286	encode_hv (enc, (HV *)sv);	727	encode_hv (enc, (HV *)sv);
287	else if (svt == SVt_PVAV)	728	else if (svt == SVt_PVAV)
288	encode_av (enc, (AV *)sv);	729	encode_av (enc, (AV *)sv);
289	else if (svt < SVt_PVAV)
290	{
291	STRLEN len = 0;
292	char *pv = svt ? SvPV (sv, len) : 0;
293
294	if (len == 1 && *pv == '1')
295	encode_ch (enc, 0xe0 | 21);
296	else if (len == 1 && *pv == '0')
297	encode_ch (enc, 0xe0 | 20);
298	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
299	encode_ch (enc, 0xe0 | 23);
300	else
301	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
302	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
303	}
304	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
305	encode_ch (enc, 0xe0 | 23);
306	else	730	else
307	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	731	{
308	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	732	encode_tag (enc, CBOR_TAG_INDIRECTION);
		733	encode_sv (enc, sv);
		734	}
309	}	735	}
310		736
311	static void	737	static void
312	encode_nv (enc_t *enc, SV *sv)	738	encode_nv (enc_t *enc, SV *sv)
313	{	739	{
314	double nv = SvNVX (sv);	740	double nv = SvNVX (sv);
315		741
316	need (enc, 9);	742	need (enc, 9);
317		743
318	if (ecb_expect_false (nv == (U32)nv))	744	if (ecb_expect_false (nv == (NV)(U32)nv))
319	encode_uint (enc, 0x00, (U32)nv);	745	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
320	//TODO: maybe I32?	746	//TODO: maybe I32?
321	else if (ecb_expect_false (nv == (float)nv))	747	else if (ecb_expect_false (nv == (float)nv))
322	{	748	encode_float32 (enc, nv);
323	uint32_t fp = ecb_float_to_binary32 (nv);
324
325	*enc->cur++ = 0xe0 | 26;
326
327	if (!ecb_big_endian ())
328	fp = ecb_bswap32 (fp);
329
330	memcpy (enc->cur, &fp, 4);
331	enc->cur += 4;
332	}
333	else	749	else
334	{	750	encode_float64 (enc, nv);
335	uint64_t fp = ecb_double_to_binary64 (nv);
336
337	*enc->cur++ = 0xe0 | 27;
338
339	if (!ecb_big_endian ())
340	fp = ecb_bswap64 (fp);
341
342	memcpy (enc->cur, &fp, 8);
343	enc->cur += 8;
344	}
345	}	751	}
346		752
347	static void	753	static void
348	encode_sv (enc_t *enc, SV *sv)	754	encode_sv (enc_t *enc, SV *sv)
349	{	755	{
…		…
351		757
352	if (SvPOKp (sv))	758	if (SvPOKp (sv))
353	{	759	{
354	STRLEN len;	760	STRLEN len;
355	char *str = SvPV (sv, len);	761	char *str = SvPV (sv, len);
356	encode_str (enc, SvUTF8 (sv), str, len);	762	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
357	}	763	}
358	else if (SvNOKp (sv))	764	else if (SvNOKp (sv))
359	encode_nv (enc, sv);	765	encode_nv (enc, sv);
360	else if (SvIOKp (sv))	766	else if (SvIOKp (sv))
361	{	767	encode_int (enc, sv);
362	if (SvIsUV (sv))
363	encode_uint (enc, 0x00, SvUVX (sv));
364	else if (SvIVX (sv) >= 0)
365	encode_uint (enc, 0x00, SvIVX (sv));
366	else
367	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
368	}
369	else if (SvROK (sv))	768	else if (SvROK (sv))
370	encode_rv (enc, SvRV (sv));	769	encode_rv (enc, SvRV (sv));
371	else if (!SvOK (sv))	770	else if (!SvOK (sv))
372	encode_ch (enc, 0xe0 | 22);	771	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
373	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	772	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
374	encode_ch (enc, 0xe0 | 23);	773	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
375	else	774	else
376	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	775	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
377	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	776	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
378	}	777	}
379		778
380	static SV *	779	static SV *
381	encode_cbor (SV *scalar, CBOR *cbor)	780	encode_cbor (SV *scalar, CBOR *cbor)
382	{	781	{
383	enc_t enc;	782	enc_t enc = { 0 };
384		783
385	enc.cbor = *cbor;	784	enc.cbor = *cbor;
386	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	785	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
387	enc.cur = SvPVX (enc.sv);	786	enc.cur = SvPVX (enc.sv);
388	enc.end = SvEND (enc.sv);	787	enc.end = SvEND (enc.sv);
389	enc.depth = 0;
390		788
391	SvPOK_only (enc.sv);	789	SvPOK_only (enc.sv);
		790
		791	if (cbor->flags & F_PACK_STRINGS)
		792	{
		793	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		794	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		795	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		796	}
		797
392	encode_sv (&enc, scalar);	798	encode_sv (&enc, scalar);
393		799
394	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	800	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
395	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	801	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
396		802
…		…
410	U8 *end; // end of input string	816	U8 *end; // end of input string
411	const char *err; // parse error, if != 0	817	const char *err; // parse error, if != 0
412	CBOR cbor;	818	CBOR cbor;
413	U32 depth; // recursion depth	819	U32 depth; // recursion depth
414	U32 maxdepth; // recursion depth limit	820	U32 maxdepth; // recursion depth limit
		821	AV *shareable;
		822	AV *stringref;
		823	SV *decode_tagged;
		824	SV *err_sv; // optional sv for error, needs to be freed
415	} dec_t;	825	} dec_t;
416		826
417	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	827	// set dec->err to ERRSV
		828	ecb_cold static void
		829	err_errsv (dec_t *dec)
		830	{
		831	if (!dec->err)
		832	{
		833	dec->err_sv = newSVsv (ERRSV);
418		834
419	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	835	// chop off the trailing \n
		836	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		837	*SvEND (dec->err_sv) = 0;
420		838
		839	dec->err = SvPVutf8_nolen (dec->err_sv);
		840	}
		841	}
		842
		843	// the following functions are used to reduce code size and help the compiler to optimise
		844	ecb_cold static void
		845	err_set (dec_t *dec, const char *reason)
		846	{
		847	if (!dec->err)
		848	dec->err = reason;
		849	}
		850
		851	ecb_cold static void
		852	err_unexpected_end (dec_t *dec)
		853	{
		854	err_set (dec, "unexpected end of CBOR data");
		855	}
		856
		857	#define ERR_DO(do) SB do; goto fail; SE
		858	#define ERR(reason) ERR_DO (err_set (dec, reason))
		859	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		860
		861	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		862
421	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	863	#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED)
422	#define DEC_DEC_DEPTH --dec->depth	864	#define DEC_DEC_DEPTH --dec->depth
423		865
424	static UV	866	static UV
425	decode_uint (dec_t *dec)	867	decode_uint (dec_t *dec)
426	{	868	{
427	switch (*dec->cur & 31)	869	U8 m = *dec->cur & MINOR_MASK;
428	{	870	++dec->cur;
429	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
430	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
431	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
432	return *dec->cur++ & 31;
433		871
434	case 24:	872	if (ecb_expect_true (m < LENGTH_EXT1))
		873	return m;
		874	else if (ecb_expect_true (m == LENGTH_EXT1))
		875	{
435	WANT (2);	876	WANT (1);
436	dec->cur += 2;	877	dec->cur += 1;
437	return dec->cur[-1];	878	return dec->cur[-1];
438		879	}
439	case 25:	880	else if (ecb_expect_true (m == LENGTH_EXT2))
		881	{
440	WANT (3);	882	WANT (2);
441	dec->cur += 3;	883	dec->cur += 2;
442	return (((UV)dec->cur[-2]) << 8)	884	return (((UV)dec->cur[-2]) << 8)
443	| ((UV)dec->cur[-1]);	885	| ((UV)dec->cur[-1]);
444		886	}
445	case 26:	887	else if (ecb_expect_true (m == LENGTH_EXT4))
		888	{
446	WANT (5);	889	WANT (4);
447	dec->cur += 5;	890	dec->cur += 4;
448	return (((UV)dec->cur[-4]) << 24)	891	return (((UV)dec->cur[-4]) << 24)
449	| (((UV)dec->cur[-3]) << 16)	892	| (((UV)dec->cur[-3]) << 16)
450	| (((UV)dec->cur[-2]) << 8)	893	| (((UV)dec->cur[-2]) << 8)
451	| ((UV)dec->cur[-1]);	894	| ((UV)dec->cur[-1]);
452		895	}
453	case 27:	896	else if (ecb_expect_true (m == LENGTH_EXT8))
		897	{
454	WANT (9);	898	WANT (8);
455	dec->cur += 9;	899	dec->cur += 8;
		900
		901	return
		902	#if UVSIZE < 8
		903	0
		904	#else
456	return (((UV)dec->cur[-8]) << 56)	905	(((UV)dec->cur[-8]) << 56)
457	| (((UV)dec->cur[-7]) << 48)	906	| (((UV)dec->cur[-7]) << 48)
458	| (((UV)dec->cur[-6]) << 40)	907	| (((UV)dec->cur[-6]) << 40)
459	| (((UV)dec->cur[-5]) << 32)	908	| (((UV)dec->cur[-5]) << 32)
		909	#endif
460	| (((UV)dec->cur[-4]) << 24)	910	| (((UV)dec->cur[-4]) << 24)
461	| (((UV)dec->cur[-3]) << 16)	911	| (((UV)dec->cur[-3]) << 16)
462	| (((UV)dec->cur[-2]) << 8)	912	| (((UV)dec->cur[-2]) << 8)
463	| ((UV)dec->cur[-1]);	913	| ((UV)dec->cur[-1]);
464		914	}
465	default:	915	else
466	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	916	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
467	}
468		917
469	fail:	918	fail:
470	return 0;	919	return 0;
471	}	920	}
472		921
…		…
477	{	926	{
478	AV *av = newAV ();	927	AV *av = newAV ();
479		928
480	DEC_INC_DEPTH;	929	DEC_INC_DEPTH;
481		930
482	if ((*dec->cur & 31) == 31)	931	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
483	{	932	{
484	++dec->cur;	933	++dec->cur;
485		934
486	for (;;)	935	for (;;)
487	{	936	{
488	WANT (1);	937	WANT (1);
489		938
490	if (*dec->cur == (0xe0 | 31))	939	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
491	{	940	{
492	++dec->cur;	941	++dec->cur;
493	break;	942	break;
494	}	943	}
495		944
496	av_push (av, decode_sv (dec));	945	av_push (av, decode_sv (dec));
497	}	946	}
498	}	947	}
499	else	948	else
500	{	949	{
501	int i, len = decode_uint (dec);	950	UV i, len = decode_uint (dec);
502		951
		952	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
503	av_fill (av, len - 1);	953	av_fill (av, len - 1);
504		954
505	for (i = 0; i < len; ++i)	955	for (i = 0; i < len; ++i)
506	AvARRAY (av)[i] = decode_sv (dec);	956	AvARRAY (av)[i] = decode_sv (dec);
507	}	957	}
508		958
509	DEC_DEC_DEPTH;	959	DEC_DEC_DEPTH;
510	return newRV_noinc ((SV *)av);	960	return newRV_noinc ((SV *)av);
511		961
512	fail:	962	fail:
513	SvREFCNT_dec (av);	963	SvREFCNT_dec_NN (av);
514	DEC_DEC_DEPTH;	964	DEC_DEC_DEPTH;
515	return &PL_sv_undef;	965	return &PL_sv_undef;
516	}	966	}
517		967
		968	static void
		969	decode_he (dec_t *dec, HV *hv)
		970	{
		971	// for speed reasons, we specialcase single-string
		972	// byte or utf-8 strings as keys, but only when !stringref
		973
		974	if (ecb_expect_true (!dec->stringref))
		975	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		976	{
		977	STRLEN len = decode_uint (dec);
		978	char *key = (char *)dec->cur;
		979
		980	WANT (len);
		981	dec->cur += len;
		982
		983	hv_store (hv, key, len, decode_sv (dec), 0);
		984
		985	return;
		986	}
		987	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		988	{
		989	STRLEN len = decode_uint (dec);
		990	char *key = (char *)dec->cur;
		991
		992	WANT (len);
		993	dec->cur += len;
		994
		995	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		996	if (!cbor_is_utf8_string ((U8 *)key, len))
		997	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		998
		999	hv_store (hv, key, -len, decode_sv (dec), 0);
		1000
		1001	return;
		1002	}
		1003
		1004	SV *k = decode_sv (dec);
		1005	SV *v = decode_sv (dec);
		1006
		1007	// we leak memory if uncaught exceptions are thrown by random magical
		1008	// methods, and this is hopefully the only place where it can happen,
		1009	// so if there is a chance of an exception, take the very slow path.
		1010	// since catching exceptions is "undocumented/internal/forbidden" by
		1011	// the new p5p powers, we need to call out to a perl function :/
		1012	if (ecb_expect_false (SvAMAGIC (k)))
		1013	{
		1014	dSP;
		1015
		1016	ENTER; SAVETMPS;
		1017	PUSHMARK (SP);
		1018	EXTEND (SP, 3);
		1019	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		1020	PUSHs (sv_2mortal (k));
		1021	PUSHs (sv_2mortal (v));
		1022
		1023	PUTBACK;
		1024	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		1025	SPAGAIN;
		1026
		1027	FREETMPS; LEAVE;
		1028
		1029	if (SvTRUE (ERRSV))
		1030	ERR_ERRSV;
		1031
		1032	return;
		1033	}
		1034
		1035	hv_store_ent (hv, k, v, 0);
		1036	SvREFCNT_dec_NN (k);
		1037
		1038	fail:
		1039	;
		1040	}
		1041
518	static SV *	1042	static SV *
519	decode_hv (dec_t *dec)	1043	decode_hv (dec_t *dec)
520	{	1044	{
521	HV *hv = newHV ();	1045	HV *hv = newHV ();
522		1046
523	DEC_INC_DEPTH;	1047	DEC_INC_DEPTH;
524		1048
525	if ((*dec->cur & 31) == 31)	1049	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
526	{	1050	{
527	++dec->cur;	1051	++dec->cur;
528		1052
529	for (;;)	1053	for (;;)
530	{	1054	{
531	WANT (1);	1055	WANT (1);
532		1056
533	if (*dec->cur == (0xe0 | 31))	1057	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
534	{	1058	{
535	++dec->cur;	1059	++dec->cur;
536	break;	1060	break;
537	}	1061	}
538		1062
539	SV *k = decode_sv (dec);	1063	decode_he (dec, hv);
540	SV *v = decode_sv (dec);
541
542	hv_store_ent (hv, k, v, 0);
543	}	1064	}
544	}	1065	}
545	else	1066	else
546	{	1067	{
547	int len = decode_uint (dec);	1068	UV pairs = decode_uint (dec);
548		1069
		1070	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1071
549	while (len--)	1072	while (pairs--)
550	{	1073	decode_he (dec, hv);
551	SV *k = decode_sv (dec);
552	SV *v = decode_sv (dec);
553
554	hv_store_ent (hv, k, v, 0);
555	}
556	}	1074	}
557		1075
558	DEC_DEC_DEPTH;	1076	DEC_DEC_DEPTH;
559	return newRV_noinc ((SV *)hv);	1077	return newRV_noinc ((SV *)hv);
560		1078
561	fail:	1079	fail:
562	SvREFCNT_dec (hv);	1080	SvREFCNT_dec_NN (hv);
563	DEC_DEC_DEPTH;	1081	DEC_DEC_DEPTH;
564	return &PL_sv_undef;	1082	return &PL_sv_undef;
565	}	1083	}
566		1084
567	static SV *	1085	static SV *
568	decode_str (dec_t *dec, int utf8)	1086	decode_str (dec_t *dec, int utf8)
569	{	1087	{
570	SV *sv = 0;	1088	SV *sv = 0;
571		1089
572	if ((*dec->cur & 31) == 31)	1090	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
573	{	1091	{
		1092	// indefinite length strings
574	++dec->cur;	1093	++dec->cur;
575		1094
		1095	U8 major = *dec->cur & MAJOR_MISC;
		1096
576	sv = newSVpvn ("", 0);	1097	sv = newSVpvn ("", 0);
577		1098
578	// not very fast, and certainly not robust against illegal input
579	for (;;)	1099	for (;;)
580	{	1100	{
581	WANT (1);	1101	WANT (1);
582		1102
583	if (*dec->cur == (0xe0 | 31))	1103	if ((*dec->cur - major) > LENGTH_EXT8)
		1104	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
584	{	1105	{
585	++dec->cur;	1106	++dec->cur;
586	break;	1107	break;
587	}	1108	}
		1109	else
		1110	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
588		1111
589	sv_catsv (sv, decode_sv (dec));	1112	STRLEN len = decode_uint (dec);
		1113
		1114	WANT (len);
		1115	sv_catpvn (sv, dec->cur, len);
		1116	dec->cur += len;
590	}	1117	}
591	}	1118	}
592	else	1119	else
593	{	1120	{
594	STRLEN len = decode_uint (dec);	1121	STRLEN len = decode_uint (dec);
595		1122
596	WANT (len);	1123	WANT (len);
597	sv = newSVpvn (dec->cur, len);	1124	sv = newSVpvn (dec->cur, len);
598	dec->cur += len;	1125	dec->cur += len;
		1126
		1127	if (ecb_expect_false (dec->stringref)
		1128	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		1129	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
599	}	1130	}
600		1131
601	if (utf8)	1132	if (utf8)
		1133	{
		1134	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		1135	if (!cbor_is_utf8_string (SvPVX (sv), SvCUR (sv)))
		1136	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		1137
602	SvUTF8_on (sv);	1138	SvUTF8_on (sv);
		1139	}
603		1140
604	return sv;	1141	return sv;
605		1142
606	fail:	1143	fail:
607	SvREFCNT_dec (sv);	1144	SvREFCNT_dec (sv);
…		…
609	}	1146	}
610		1147
611	static SV *	1148	static SV *
612	decode_tagged (dec_t *dec)	1149	decode_tagged (dec_t *dec)
613	{	1150	{
		1151	SV *sv = 0;
614	UV tag = decode_uint (dec);	1152	UV tag = decode_uint (dec);
		1153
		1154	WANT (1);
		1155
		1156	switch (tag)
		1157	{
		1158	case CBOR_TAG_MAGIC:
615	SV *sv = decode_sv (dec);	1159	sv = decode_sv (dec);
		1160	break;
616		1161
617	if (tag == 55799) // 2.4.5 Self-Describe CBOR	1162	case CBOR_TAG_INDIRECTION:
		1163	sv = newRV_noinc (decode_sv (dec));
		1164	break;
		1165
		1166	case CBOR_TAG_STRINGREF_NAMESPACE:
		1167	{
		1168	// do not use SAVETMPS/FREETMPS, as these will
		1169	// erase mortalised caches, e.g. "shareable"
		1170	ENTER;
		1171
		1172	SAVESPTR (dec->stringref);
		1173	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1174
		1175	sv = decode_sv (dec);
		1176
		1177	LEAVE;
		1178	}
		1179	break;
		1180
		1181	case CBOR_TAG_STRINGREF:
		1182	{
		1183	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1184	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1185
		1186	UV idx = decode_uint (dec);
		1187
		1188	if (!dec->stringref || idx >= (UV)(1 + AvFILLp (dec->stringref)))
		1189	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1190
		1191	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1192	}
		1193	break;
		1194
		1195	case CBOR_TAG_VALUE_SHAREABLE:
		1196	{
		1197	if (ecb_expect_false (!dec->shareable))
		1198	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1199
		1200	if (ecb_expect_false (dec->cbor.flags & (F_ALLOW_CYCLES | F_ALLOW_WEAK_CYCLES)))
		1201	{
		1202	// if cycles are allowed, then we store an AV as value
		1203	// while it is being decoded, and gather unresolved
		1204	// references in it, to be re4solved after decoding.
		1205	int idx, i;
		1206	AV *av = newAV ();
		1207	av_push (dec->shareable, (SV *)av);
		1208	idx = AvFILLp (dec->shareable);
		1209
		1210	sv = decode_sv (dec);
		1211
		1212	// the AV now contains \undef for all unresolved references,
		1213	// so we fix them up here.
		1214	for (i = 0; i <= AvFILLp (av); ++i)
		1215	SvRV_set (AvARRAY (av)[i], SvREFCNT_inc_NN (SvRV (sv)));
		1216
		1217	// weaken all recursive references
		1218	if (dec->cbor.flags & F_ALLOW_WEAK_CYCLES)
		1219	for (i = 0; i <= AvFILLp (av); ++i)
		1220	sv_rvweaken (AvARRAY (av)[i]);
		1221
		1222	// now replace the AV by a reference to the completed value
		1223	SvREFCNT_dec_NN ((SV *)av);
		1224	AvARRAY (dec->shareable)[idx] = SvREFCNT_inc_NN (sv);
		1225	}
		1226	else
		1227	{
		1228	av_push (dec->shareable, &PL_sv_undef);
		1229	int idx = AvFILLp (dec->shareable);
		1230	sv = decode_sv (dec);
		1231	AvARRAY (dec->shareable)[idx] = SvREFCNT_inc_NN (sv);
		1232	}
		1233	}
		1234	break;
		1235
		1236	case CBOR_TAG_VALUE_SHAREDREF:
		1237	{
		1238	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1239	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1240
		1241	UV idx = decode_uint (dec);
		1242
		1243	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
		1244	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1245
		1246	sv = AvARRAY (dec->shareable)[idx];
		1247
		1248	// reference to cycle, we create a new \undef and use that, and also
		1249	// registerr it in the AV for later fixing
		1250	if (ecb_expect_false (SvTYPE (sv) == SVt_PVAV))
		1251	{
		1252	AV *av = (AV *)sv;
		1253	sv = newRV_noinc (&PL_sv_undef);
		1254	av_push (av, SvREFCNT_inc_NN (sv));
		1255	}
		1256	else if (ecb_expect_false (sv == &PL_sv_undef)) // not yet decoded, but cycles not allowed
		1257	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1258	else // we decoded the object earlier, no cycle
		1259	sv = newSVsv (sv);
		1260	}
		1261	break;
		1262
		1263	case CBOR_TAG_PERL_OBJECT:
		1264	{
		1265	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1266	goto filter;
		1267
		1268	sv = decode_sv (dec);
		1269
		1270	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1271	ERR ("corrupted CBOR data (non-array perl object)");
		1272
		1273	AV *av = (AV *)SvRV (sv);
		1274	int len = av_len (av) + 1;
		1275	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1276
		1277	if (!stash)
		1278	ERR ("cannot decode perl-object (package does not exist)");
		1279
		1280	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1281
		1282	if (!method)
		1283	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1284
		1285	dSP;
		1286
		1287	ENTER; SAVETMPS;
		1288	PUSHMARK (SP);
		1289	EXTEND (SP, len + 1);
		1290	// we re-bless the reference to get overload and other niceties right
		1291	PUSHs (*av_fetch (av, 0, 1));
		1292	PUSHs (sv_cbor);
		1293
		1294	int i;
		1295
		1296	for (i = 1; i < len; ++i)
		1297	PUSHs (*av_fetch (av, i, 1));
		1298
		1299	PUTBACK;
		1300	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1301	SPAGAIN;
		1302
		1303	if (SvTRUE (ERRSV))
		1304	{
		1305	FREETMPS; LEAVE;
		1306	ERR_ERRSV;
		1307	}
		1308
		1309	SvREFCNT_dec_NN (sv);
		1310	sv = SvREFCNT_inc (POPs);
		1311
		1312	PUTBACK;
		1313
		1314	FREETMPS; LEAVE;
		1315	}
		1316	break;
		1317
		1318	default:
		1319	filter:
		1320	{
		1321	SV *tag_sv = newSVuv (tag);
		1322
		1323	sv = decode_sv (dec);
		1324
		1325	dSP;
		1326	ENTER; SAVETMPS;
		1327	PUSHMARK (SP);
		1328	EXTEND (SP, 2);
		1329	PUSHs (tag_sv);
		1330	PUSHs (sv);
		1331
		1332	PUTBACK;
		1333	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1334	SPAGAIN;
		1335
		1336	if (SvTRUE (ERRSV))
		1337	{
		1338	SvREFCNT_dec_NN (tag_sv);
		1339	FREETMPS; LEAVE;
		1340	ERR_ERRSV;
		1341	}
		1342
		1343	if (count)
		1344	{
		1345	SvREFCNT_dec_NN (tag_sv);
		1346	SvREFCNT_dec_NN (sv);
		1347	sv = SvREFCNT_inc_NN (TOPs);
		1348	SP -= count;
		1349	}
		1350	else
		1351	{
		1352	AV *av = newAV ();
		1353	av_push (av, tag_sv);
		1354	av_push (av, sv);
		1355
		1356	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1357	? cbor_tagged_stash
		1358	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1359	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1360	}
		1361
		1362	PUTBACK;
		1363
		1364	FREETMPS; LEAVE;
		1365	}
		1366	break;
		1367	}
		1368
618	return sv;	1369	return sv;
619		1370
620	AV *av = newAV ();	1371	fail:
621	av_push (av, newSVuv (tag));	1372	SvREFCNT_dec (sv);
622	av_push (av, sv);	1373	return &PL_sv_undef;
623
624	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
625	? cbor_tagged_stash
626	: gv_stashpv ("CBOR::XS::Tagged" , 1);
627
628	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);
629	}	1374	}
630		1375
631	static SV *	1376	static SV *
632	decode_sv (dec_t *dec)	1377	decode_sv (dec_t *dec)
633	{	1378	{
634	WANT (1);	1379	WANT (1);
635		1380
636	switch (*dec->cur >> 5)	1381	switch (*dec->cur >> MAJOR_SHIFT)
637	{	1382	{
638	case 0: // unsigned int	1383	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
639	return newSVuv (decode_uint (dec));	1384	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
640	case 1: // negative int	1385	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
641	return newSViv (-1 - (IV)decode_uint (dec));	1386	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
642	case 2: // octet string	1387	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
643	return decode_str (dec, 0);	1388	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
644	case 3: // utf-8 string	1389	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
645	return decode_str (dec, 1);	1390
646	case 4: // array	1391	case MAJOR_MISC >> MAJOR_SHIFT:
647	return decode_av (dec);
648	case 5: // map
649	return decode_hv (dec);
650	case 6: // tag
651	return decode_tagged (dec);
652	case 7: // misc
653	switch (*dec->cur++ & 31)	1392	switch (*dec->cur++ & MINOR_MASK)
654	{	1393	{
655	case 20:	1394	case SIMPLE_FALSE:
656	#if CBOR_SLOW	1395	#if CBOR_SLOW
657	cbor_false = get_bool ("CBOR::XS::false");	1396	types_false = get_bool ("Types::Serialiser::false");
658	#endif	1397	#endif
659	return newSVsv (cbor_false);	1398	return newSVsv (types_false);
660	case 21:	1399	case SIMPLE_TRUE:
661	#if CBOR_SLOW	1400	#if CBOR_SLOW
662	cbor_true = get_bool ("CBOR::XS::true");	1401	types_true = get_bool ("Types::Serialiser::true");
663	#endif	1402	#endif
664	return newSVsv (cbor_true);	1403	return newSVsv (types_true);
665	case 22:	1404	case SIMPLE_NULL:
666	return newSVsv (&PL_sv_undef);	1405	return newSVsv (&PL_sv_undef);
		1406	case SIMPLE_UNDEF:
		1407	#if CBOR_SLOW
		1408	types_error = get_bool ("Types::Serialiser::error");
		1409	#endif
		1410	return newSVsv (types_error);
667		1411
668	case 25:	1412	case MISC_FLOAT16:
669	{	1413	{
670	WANT (2);	1414	WANT (2);
671		1415
672	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1416	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
673	dec->cur += 2;	1417	dec->cur += 2;
674		1418
675	return newSVnv (ecb_binary16_to_float (fp));	1419	return newSVnv (ecb_binary16_to_float (fp));
676	}	1420	}
677		1421
678	case 26:	1422	case MISC_FLOAT32:
679	{	1423	{
680	uint32_t fp;	1424	uint32_t fp;
681	WANT (4);	1425	WANT (4);
682	memcpy (&fp, dec->cur, 4);	1426	memcpy (&fp, dec->cur, 4);
683	dec->cur += 4;	1427	dec->cur += 4;
…		…
686	fp = ecb_bswap32 (fp);	1430	fp = ecb_bswap32 (fp);
687		1431
688	return newSVnv (ecb_binary32_to_float (fp));	1432	return newSVnv (ecb_binary32_to_float (fp));
689	}	1433	}
690		1434
691	case 27:	1435	case MISC_FLOAT64:
692	{	1436	{
693	uint64_t fp;	1437	uint64_t fp;
694	WANT (8);	1438	WANT (8);
695	memcpy (&fp, dec->cur, 8);	1439	memcpy (&fp, dec->cur, 8);
696	dec->cur += 8;	1440	dec->cur += 8;
…		…
699	fp = ecb_bswap64 (fp);	1443	fp = ecb_bswap64 (fp);
700		1444
701	return newSVnv (ecb_binary64_to_double (fp));	1445	return newSVnv (ecb_binary64_to_double (fp));
702	}	1446	}
703		1447
704	// 0..19 unassigned	1448	// 0..19 unassigned simple
705	// 24 reserved + unassigned (reserved values are not encodable)	1449	// 24 reserved + unassigned simple (reserved values are not encodable)
		1450	// 28-30 unassigned misc
		1451	// 31 break code
706	default:	1452	default:
707	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1453	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
708	}	1454	}
709		1455
710	break;	1456	break;
711	}	1457	}
712		1458
…		…
715	}	1461	}
716		1462
717	static SV *	1463	static SV *
718	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1464	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
719	{	1465	{
720	dec_t dec;	1466	dec_t dec = { 0 };
721	SV *sv;	1467	SV *sv;
		1468	STRLEN len;
		1469	char *data = SvPVbyte (string, len);
722		1470
723	/* work around bugs in 5.10 where manipulating magic values
724	* makes perl ignore the magic in subsequent accesses.
725	* also make a copy of non-PV values, to get them into a clean
726	* state (SvPV should do that, but it's buggy, see below).
727	*/
728	/*SvGETMAGIC (string);*/
729	if (SvMAGICAL (string) || !SvPOK (string))
730	string = sv_2mortal (newSVsv (string));
731
732	SvUPGRADE (string, SVt_PV);
733
734	/* work around a bug in perl 5.10, which causes SvCUR to fail an
735	* assertion with -DDEBUGGING, although SvCUR is documented to
736	* return the xpv_cur field which certainly exists after upgrading.
737	* according to nicholas clark, calling SvPOK fixes this.
738	* But it doesn't fix it, so try another workaround, call SvPV_nolen
739	* and hope for the best.
740	* Damnit, SvPV_nolen still trips over yet another assertion. This
741	* assertion business is seriously broken, try yet another workaround
742	* for the broken -DDEBUGGING.
743	*/
744	{
745	#ifdef DEBUGGING
746	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
747	#else
748	STRLEN offset = SvCUR (string);
749	#endif
750
751	if (offset > cbor->max_size && cbor->max_size)	1471	if (len > cbor->max_size && cbor->max_size)
752	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1472	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
753	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1473	(unsigned long)len, (unsigned long)cbor->max_size);
754	}
755
756	sv_utf8_downgrade (string, 0);
757		1474
758	dec.cbor = *cbor;	1475	dec.cbor = *cbor;
759	dec.cur = (U8 *)SvPVX (string);	1476	dec.cur = (U8 *)data;
760	dec.end = (U8 *)SvEND (string);	1477	dec.end = (U8 *)data + len;
761	dec.err = 0;
762	dec.depth = 0;
763		1478
764	sv = decode_sv (&dec);	1479	sv = decode_sv (&dec);
765		1480
766	if (offset_return)	1481	if (offset_return)
767	*offset_return = dec.cur;	1482	*offset_return = dec.cur;
…		…
770	if (dec.cur != dec.end && !dec.err)	1485	if (dec.cur != dec.end && !dec.err)
771	dec.err = "garbage after CBOR object";	1486	dec.err = "garbage after CBOR object";
772		1487
773	if (dec.err)	1488	if (dec.err)
774	{	1489	{
		1490	if (dec.shareable)
		1491	{
		1492	// need to break cyclic links, which would all be in shareable
		1493	int i;
		1494	SV **svp;
		1495
		1496	for (i = av_len (dec.shareable) + 1; i--; )
		1497	if ((svp = av_fetch (dec.shareable, i, 0)))
		1498	sv_setsv (*svp, &PL_sv_undef);
		1499	}
		1500
775	SvREFCNT_dec (sv);	1501	SvREFCNT_dec_NN (sv);
		1502
		1503	if (dec.err_sv)
		1504	sv_2mortal (dec.err_sv);
		1505
776	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1506	croak ("%s, at offset %ld (octet 0x%02x)", dec.err, (long)(dec.cur - (U8 *)data), (int)(uint8_t)*dec.cur);
777	}	1507	}
778		1508
779	sv = sv_2mortal (sv);	1509	sv = sv_2mortal (sv);
780		1510
781	return sv;	1511	return sv;
782	}	1512	}
783		1513
		1514	/////////////////////////////////////////////////////////////////////////////
		1515	// incremental parser
		1516
		1517	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1518
		1519	// returns 0 for notyet, 1 for success or error
		1520	static int
		1521	incr_parse (CBOR *self, SV *cborstr)
		1522	{
		1523	STRLEN cur;
		1524	SvPV (cborstr, cur);
		1525
		1526	while (ecb_expect_true (self->incr_need <= cur))
		1527	{
		1528	// table of integer count bytes
		1529	static I8 incr_len[MINOR_MASK + 1] = {
		1530	0, 0, 0, 0, 0, 0, 0, 0,
		1531	0, 0, 0, 0, 0, 0, 0, 0,
		1532	0, 0, 0, 0, 0, 0, 0, 0,
		1533	1, 2, 4, 8,-1,-1,-1,-2
		1534	};
		1535
		1536	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1537	U8 m = *p & MINOR_MASK;
		1538	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1539	I8 ilen = incr_len[m];
		1540
		1541	self->incr_need = self->incr_pos + 1;
		1542
		1543	if (ecb_expect_false (ilen < 0))
		1544	{
		1545	if (m != MINOR_INDEF)
		1546	return 1; // error
		1547
		1548	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1549	{
		1550	if (count >= 0)
		1551	return 1; // error
		1552
		1553	count = 1;
		1554	}
		1555	else
		1556	{
		1557	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1558	count = -1;
		1559	}
		1560	}
		1561	else
		1562	{
		1563	self->incr_need += ilen;
		1564	if (ecb_expect_false (self->incr_need > cur))
		1565	return 0;
		1566
		1567	int major = *p >> MAJOR_SHIFT;
		1568
		1569	switch (major)
		1570	{
		1571	case MAJOR_TAG >> MAJOR_SHIFT:
		1572	++count; // tags merely prefix another value
		1573	break;
		1574
		1575	case MAJOR_BYTES >> MAJOR_SHIFT:
		1576	case MAJOR_TEXT >> MAJOR_SHIFT:
		1577	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1578	case MAJOR_MAP >> MAJOR_SHIFT:
		1579	{
		1580	UV len;
		1581
		1582	if (ecb_expect_false (ilen))
		1583	{
		1584	len = 0;
		1585
		1586	do {
		1587	len = (len << 8) | *++p;
		1588	} while (--ilen);
		1589	}
		1590	else
		1591	len = m;
		1592
		1593	switch (major)
		1594	{
		1595	case MAJOR_BYTES >> MAJOR_SHIFT:
		1596	case MAJOR_TEXT >> MAJOR_SHIFT:
		1597	self->incr_need += len;
		1598	if (ecb_expect_false (self->incr_need > cur))
		1599	return 0;
		1600
		1601	break;
		1602
		1603	case MAJOR_MAP >> MAJOR_SHIFT:
		1604	len <<= 1;
		1605	/* FALLTHROUGH */
		1606	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1607	if (len)
		1608	{
		1609	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1610	count = len + 1;
		1611	}
		1612	break;
		1613	}
		1614	}
		1615	}
		1616	}
		1617
		1618	self->incr_pos = self->incr_need;
		1619
		1620	if (count > 0)
		1621	{
		1622	while (!--count)
		1623	{
		1624	if (!AvFILLp (self->incr_count))
		1625	return 1; // done
		1626
		1627	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1628	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1629	}
		1630
		1631	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1632	}
		1633	}
		1634
		1635	return 0;
		1636	}
		1637
		1638
784	/////////////////////////////////////////////////////////////////////////////	1639	/////////////////////////////////////////////////////////////////////////////
785	// XS interface functions	1640	// XS interface functions
786		1641
787	MODULE = CBOR::XS PACKAGE = CBOR::XS	1642	MODULE = CBOR::XS PACKAGE = CBOR::XS
788		1643
789	BOOT:	1644	BOOT:
790	{	1645	{
791	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1646	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
792	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);
793	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);	1647	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
794		1648
795	cbor_true = get_bool ("CBOR::XS::true");	1649	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
796	cbor_false = get_bool ("CBOR::XS::false");	1650	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1651
		1652	types_true = get_bool ("Types::Serialiser::true" );
		1653	types_false = get_bool ("Types::Serialiser::false");
		1654	types_error = get_bool ("Types::Serialiser::error");
		1655
		1656	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1657
		1658	sv_cbor = newSVpv ("CBOR", 0);
		1659	SvREADONLY_on (sv_cbor);
		1660
		1661	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
797	}	1662	}
798		1663
799	PROTOTYPES: DISABLE	1664	PROTOTYPES: DISABLE
800		1665
801	void CLONE (...)	1666	void CLONE (...)
802	CODE:	1667	CODE:
803	cbor_stash = 0;	1668	cbor_stash = 0;
804	cbor_boolean_stash = 0;
805	cbor_tagged_stash = 0;	1669	cbor_tagged_stash = 0;
		1670	types_error_stash = 0;
		1671	types_boolean_stash = 0;
806		1672
807	void new (char *klass)	1673	void new (char *klass)
808	PPCODE:	1674	PPCODE:
809	{	1675	{
810	SV *pv = NEWSV (0, sizeof (CBOR));	1676	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
816	)));	1682	)));
817	}	1683	}
818		1684
819	void shrink (CBOR *self, int enable = 1)	1685	void shrink (CBOR *self, int enable = 1)
820	ALIAS:	1686	ALIAS:
821	shrink = F_SHRINK	1687	shrink = F_SHRINK
822	allow_unknown = F_ALLOW_UNKNOWN	1688	allow_unknown = F_ALLOW_UNKNOWN
		1689	allow_sharing = F_ALLOW_SHARING
		1690	allow_cycles = F_ALLOW_CYCLES
		1691	allow_weak_cycles = F_ALLOW_WEAK_CYCLES
		1692	forbid_objects = F_FORBID_OBJECTS
		1693	pack_strings = F_PACK_STRINGS
		1694	text_keys = F_TEXT_KEYS
		1695	text_strings = F_TEXT_STRINGS
		1696	validate_utf8 = F_VALIDATE_UTF8
823	PPCODE:	1697	PPCODE:
824	{	1698	{
825	if (enable)	1699	if (enable)
826	self->flags |= ix;	1700	self->flags |= ix;
827	else	1701	else
…		…
830	XPUSHs (ST (0));	1704	XPUSHs (ST (0));
831	}	1705	}
832		1706
833	void get_shrink (CBOR *self)	1707	void get_shrink (CBOR *self)
834	ALIAS:	1708	ALIAS:
835	get_shrink = F_SHRINK	1709	get_shrink = F_SHRINK
836	get_allow_unknown = F_ALLOW_UNKNOWN	1710	get_allow_unknown = F_ALLOW_UNKNOWN
		1711	get_allow_sharing = F_ALLOW_SHARING
		1712	get_allow_cycles = F_ALLOW_CYCLES
		1713	get_allow_weak_cycles = F_ALLOW_WEAK_CYCLES
		1714	get_forbid_objects = F_FORBID_OBJECTS
		1715	get_pack_strings = F_PACK_STRINGS
		1716	get_text_keys = F_TEXT_KEYS
		1717	get_text_strings = F_TEXT_STRINGS
		1718	get_validate_utf8 = F_VALIDATE_UTF8
837	PPCODE:	1719	PPCODE:
838	XPUSHs (boolSV (self->flags & ix));	1720	XPUSHs (boolSV (self->flags & ix));
839		1721
840	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1722	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
841	PPCODE:	1723	PPCODE:
…		…
857	CODE:	1739	CODE:
858	RETVAL = self->max_size;	1740	RETVAL = self->max_size;
859	OUTPUT:	1741	OUTPUT:
860	RETVAL	1742	RETVAL
861		1743
862	#if 0 //TODO	1744	void filter (CBOR *self, SV *filter = 0)
863
864	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
865	PPCODE:	1745	PPCODE:
866	{
867	SvREFCNT_dec (self->cb_object);	1746	SvREFCNT_dec (self->filter);
868	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1747	self->filter = filter ? newSVsv (filter) : filter;
869
870	XPUSHs (ST (0));	1748	XPUSHs (ST (0));
871	}
872		1749
873	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1750	SV *get_filter (CBOR *self)
874	PPCODE:	1751	CODE:
875	{	1752	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
876	if (!self->cb_sk_object)	1753	OUTPUT:
877	self->cb_sk_object = newHV ();	1754	RETVAL
878
879	if (SvOK (cb))
880	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
881	else
882	{
883	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
884
885	if (!HvKEYS (self->cb_sk_object))
886	{
887	SvREFCNT_dec (self->cb_sk_object);
888	self->cb_sk_object = 0;
889	}
890	}
891
892	XPUSHs (ST (0));
893	}
894
895	#endif
896		1755
897	void encode (CBOR *self, SV *scalar)	1756	void encode (CBOR *self, SV *scalar)
898	PPCODE:	1757	PPCODE:
899	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1758	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
900	XPUSHs (scalar);	1759	XPUSHs (scalar);
…		…
913	EXTEND (SP, 2);	1772	EXTEND (SP, 2);
914	PUSHs (sv);	1773	PUSHs (sv);
915	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1774	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
916	}	1775	}
917		1776
918	#if 0	1777	void incr_parse (CBOR *self, SV *cborstr)
		1778	ALIAS:
		1779	incr_parse_multiple = 1
		1780	PPCODE:
		1781	{
		1782	if (SvUTF8 (cborstr))
		1783	sv_utf8_downgrade (cborstr, 0);
		1784
		1785	if (!self->incr_count)
		1786	{
		1787	self->incr_count = newAV ();
		1788	self->incr_pos = 0;
		1789	self->incr_need = 1;
		1790
		1791	av_push (self->incr_count, newSViv (1));
		1792	}
		1793
		1794	do
		1795	{
		1796	if (!incr_parse (self, cborstr))
		1797	{
		1798	if (self->incr_need > self->max_size && self->max_size)
		1799	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1800	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1801
		1802	break;
		1803	}
		1804
		1805	SV *sv;
		1806	char *offset;
		1807
		1808	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1809	XPUSHs (sv);
		1810
		1811	sv_chop (cborstr, offset);
		1812
		1813	av_clear (self->incr_count);
		1814	av_push (self->incr_count, newSViv (1));
		1815
		1816	self->incr_pos = 0;
		1817	self->incr_need = self->incr_pos + 1;
		1818	}
		1819	while (ix);
		1820	}
		1821
		1822	void incr_reset (CBOR *self)
		1823	CODE:
		1824	{
		1825	SvREFCNT_dec (self->incr_count);
		1826	self->incr_count = 0;
		1827	}
919		1828
920	void DESTROY (CBOR *self)	1829	void DESTROY (CBOR *self)
921	CODE:	1830	PPCODE:
922	SvREFCNT_dec (self->cb_sk_object);	1831	cbor_free (self);
923	SvREFCNT_dec (self->cb_object);
924
925	#endif
926		1832
927	PROTOTYPES: ENABLE	1833	PROTOTYPES: ENABLE
928		1834
929	void encode_cbor (SV *scalar)	1835	void encode_cbor (SV *scalar)
		1836	ALIAS:
		1837	encode_cbor = 0
		1838	encode_cbor_sharing = F_ALLOW_SHARING
930	PPCODE:	1839	PPCODE:
931	{	1840	{
932	CBOR cbor;	1841	CBOR cbor;
933	cbor_init (&cbor);	1842	cbor_init (&cbor);
		1843	cbor.flags |= ix;
934	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1844	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
935	XPUSHs (scalar);	1845	XPUSHs (scalar);
936	}	1846	}
937		1847
938	void decode_cbor (SV *cborstr)	1848	void decode_cbor (SV *cborstr)
…		…
942	cbor_init (&cbor);	1852	cbor_init (&cbor);
943	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1853	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
944	XPUSHs (cborstr);	1854	XPUSHs (cborstr);
945	}	1855	}
946		1856
		1857	#ifdef __AFL_COMPILER
		1858
		1859	void
		1860	afl_init ()
		1861	CODE:
		1862	__AFL_INIT ();
		1863
		1864	int
		1865	afl_loop (unsigned int count = 10000)
		1866	CODE:
		1867	RETVAL = __AFL_LOOP (count);
		1868	OUTPUT:
		1869	RETVAL
		1870
		1871	#endif
		1872

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