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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.8 by root, Sun Oct 27 10:12:01 2013 UTC vs.
Revision 1.80 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
14	// known tags, rfc7049	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
15	enum cbor_tag	74	enum cbor_tag
16	{	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
17	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	86	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
18	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	87	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
19	CBOR_TAG_POS_BIGNUM = 2, // byte string	88	CBOR_TAG_POS_BIGNUM = 2, // byte string
20	CBOR_TAG_NEG_BIGNUM = 3, // byte string	89	CBOR_TAG_NEG_BIGNUM = 3, // byte string
21	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	90	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
22	CBOR_TAG_BIGFLOAT = 5, // array	91	CBOR_TAG_BIGFLOAT = 5, // array
23		92
24	CBOR_TAG_CONV_B64U = 21, // base64url, any	93	CBOR_TAG_CONV_B64U = 21, // base64url, any
25	CBOR_TAG_CONV_B64 = 22, // base64, any	94	CBOR_TAG_CONV_B64 = 22, // base64, any
26	CBOR_TAG_CONV_HEX = 23, // base16, any	95	CBOR_TAG_CONV_HEX = 23, // base16, any
27	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	96	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
28		97
29	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	98	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
30	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	99	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
31	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	100	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
32	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	101	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
33	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	102	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
34		103
35	CBOR_TAG_MAGIC = 55799	104	CBOR_TAG_MAGIC = 55799, // self-describe cbor
36	};	105	};
37		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
38	#define F_SHRINK 0x00000200UL	121	#define F_SHRINK 0x00000001UL
39	#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
40		131
41	#define INIT_SIZE 32 // initial scalar size to be allocated	132	#define INIT_SIZE 32 // initial scalar size to be allocated
42		133
43	#define SB do {	134	#define SB do {
44	#define SE } while (0)	135	#define SE } while (0)
…		…
55	#else	146	#else
56	# define CBOR_SLOW 0	147	# define CBOR_SLOW 0
57	# define CBOR_STASH cbor_stash	148	# define CBOR_STASH cbor_stash
58	#endif	149	#endif
59		150
60	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::
61	static SV *cbor_true, *cbor_false;	152	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
62		153
63	typedef struct {	154	typedef struct {
64	U32 flags;	155	U32 flags;
65	U32 max_depth;	156	U32 max_depth;
66	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.
67	} CBOR;	164	} CBOR;
68		165
69	ecb_inline void	166	ecb_inline void
70	cbor_init (CBOR *cbor)	167	cbor_init (CBOR *cbor)
71	{	168	{
72	Zero (cbor, 1, CBOR);	169	Zero (cbor, 1, CBOR);
73	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);
74	}	178	}
75		179
76	/////////////////////////////////////////////////////////////////////////////	180	/////////////////////////////////////////////////////////////////////////////
77	// utility functions	181	// utility functions
78		182
…		…
100	SvPV_renew (sv, SvCUR (sv) + 1);	204	SvPV_renew (sv, SvCUR (sv) + 1);
101	#endif	205	#endif
102	}	206	}
103	}	207	}
104		208
105	/////////////////////////////////////////////////////////////////////////////	209	// minimum length of a string to be registered for stringref
106	// fp hell	210	ecb_inline STRLEN
107		211	minimum_string_length (UV idx)
108	//TODO	212	{
		213	return idx <= 23 ? 3
		214	: idx <= 0xffU ? 4
		215	: idx <= 0xffffU ? 5
		216	: idx <= 0xffffffffU ? 7
		217	: 11;
		218	}
109		219
110	/////////////////////////////////////////////////////////////////////////////	220	/////////////////////////////////////////////////////////////////////////////
111	// encoder	221	// encoder
112		222
113	// structure used for encoding CBOR	223	// structure used for encoding CBOR
…		…
116	char *cur; // SvPVX (sv) + current output position	226	char *cur; // SvPVX (sv) + current output position
117	char *end; // SvEND (sv)	227	char *end; // SvEND (sv)
118	SV *sv; // result scalar	228	SV *sv; // result scalar
119	CBOR cbor;	229	CBOR cbor;
120	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;
121	} enc_t;	235	} enc_t;
122		236
123	ecb_inline void	237	ecb_inline void
124	need (enc_t *enc, STRLEN len)	238	need (enc_t *enc, STRLEN len)
125	{	239	{
126	if (ecb_expect_false (enc->cur + len >= enc->end))	240	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
127	{	241	{
128	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	242	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
129	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	243	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
130	enc->cur = SvPVX (enc->sv) + cur;	244	enc->cur = SvPVX (enc->sv) + cur;
131	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	245	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
132	}	246	}
133	}	247	}
134		248
		249	static void encode_sv (enc_t *enc, SV *sv);
		250
135	ecb_inline void	251	ecb_inline void
136	encode_ch (enc_t *enc, char ch)	252	encode_ch (enc_t *enc, char ch)
137	{	253	{
138	need (enc, 1);	254	need (enc, 1);
139	*enc->cur++ = ch;	255	*enc->cur++ = ch;
140	}	256	}
141		257
		258	// used for tags, intregers, element counts and so on
142	static void	259	static void
143	encode_uint (enc_t *enc, int major, UV len)	260	encode_uint (enc_t *enc, int major, UV len)
144	{	261	{
145	need (enc, 9);	262	need (enc, 9);
146		263
147	if (len < 24)	264	if (ecb_expect_true (len < LENGTH_EXT1))
148	*enc->cur++ = major | len;	265	*enc->cur++ = major | len;
149	else if (len <= 0xff)	266	else if (ecb_expect_true (len <= 0xffU))
150	{	267	{
151	*enc->cur++ = major | 24;	268	*enc->cur++ = major | LENGTH_EXT1;
152	*enc->cur++ = len;	269	*enc->cur++ = len;
153	}	270	}
154	else if (len <= 0xffff)	271	else if (len <= 0xffffU)
155	{	272	{
156	*enc->cur++ = major | 25;	273	*enc->cur++ = major | LENGTH_EXT2;
157	*enc->cur++ = len >> 8;	274	*enc->cur++ = len >> 8;
158	*enc->cur++ = len;	275	*enc->cur++ = len;
159	}	276	}
160	else if (len <= 0xffffffff)	277	else if (len <= 0xffffffffU)
161	{	278	{
162	*enc->cur++ = major | 26;	279	*enc->cur++ = major | LENGTH_EXT4;
163	*enc->cur++ = len >> 24;	280	*enc->cur++ = len >> 24;
164	*enc->cur++ = len >> 16;	281	*enc->cur++ = len >> 16;
165	*enc->cur++ = len >> 8;	282	*enc->cur++ = len >> 8;
166	*enc->cur++ = len;	283	*enc->cur++ = len;
167	}	284	}
168	else	285	else
169	{	286	{
170	*enc->cur++ = major | 27;	287	*enc->cur++ = major | LENGTH_EXT8;
171	*enc->cur++ = len >> 56;	288	*enc->cur++ = len >> 56;
172	*enc->cur++ = len >> 48;	289	*enc->cur++ = len >> 48;
173	*enc->cur++ = len >> 40;	290	*enc->cur++ = len >> 40;
174	*enc->cur++ = len >> 32;	291	*enc->cur++ = len >> 32;
175	*enc->cur++ = len >> 24;	292	*enc->cur++ = len >> 24;
…		…
177	*enc->cur++ = len >> 8;	294	*enc->cur++ = len >> 8;
178	*enc->cur++ = len;	295	*enc->cur++ = len;
179	}	296	}
180	}	297	}
181		298
182	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
183	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	319	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
184	{	320	{
185	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);
186	need (enc, len);	351	need (enc, len);
187	memcpy (enc->cur, str, len);	352	memcpy (enc->cur, str, len);
188	enc->cur += len;	353	enc->cur += len;
189	}	354	}
190		355
191	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	}
192		511
193	static void	512	static void
194	encode_av (enc_t *enc, AV *av)	513	encode_av (enc_t *enc, AV *av)
195	{	514	{
196	int i, len = av_len (av);	515	int i, len = av_len (av);
…		…
198	if (enc->depth >= enc->cbor.max_depth)	517	if (enc->depth >= enc->cbor.max_depth)
199	croak (ERR_NESTING_EXCEEDED);	518	croak (ERR_NESTING_EXCEEDED);
200		519
201	++enc->depth;	520	++enc->depth;
202		521
203	encode_uint (enc, 0x80, len + 1);	522	encode_uint (enc, MAJOR_ARRAY, len + 1);
204		523
		524	if (ecb_expect_false (SvMAGICAL (av)))
205	for (i = 0; i <= len; ++i)	525	for (i = 0; i <= len; ++i)
206	{	526	{
207	SV **svp = av_fetch (av, i, 0);	527	SV **svp = av_fetch (av, i, 0);
208	encode_sv (enc, svp ? *svp : &PL_sv_undef);	528	encode_sv (enc, svp ? *svp : &PL_sv_undef);
209	}	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	}
210		536
211	--enc->depth;	537	--enc->depth;
212	}	538	}
213		539
214	static void	540	static void
…		…
222	++enc->depth;	548	++enc->depth;
223		549
224	int pairs = hv_iterinit (hv);	550	int pairs = hv_iterinit (hv);
225	int mg = SvMAGICAL (hv);	551	int mg = SvMAGICAL (hv);
226		552
227	if (mg)	553	if (ecb_expect_false (mg))
228	encode_ch (enc, 0xa0 | 31);	554	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
229	else	555	else
230	encode_uint (enc, 0xa0, pairs);	556	encode_uint (enc, MAJOR_MAP, pairs);
231		557
232	while ((he = hv_iternext (hv)))	558	while ((he = hv_iternext (hv)))
233	{	559	{
234	if (HeKLEN (he) == HEf_SVKEY)	560	if (HeKLEN (he) == HEf_SVKEY)
235	encode_sv (enc, HeSVKEY (he));	561	encode_sv (enc, HeSVKEY (he));
236	else	562	else
237	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));
238		564
239	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));
240	}	566	}
241		567
242	if (mg)	568	if (ecb_expect_false (mg))
243	encode_ch (enc, 0xe0 | 31);	569	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
244		570
245	--enc->depth;	571	--enc->depth;
246	}	572	}
247		573
248	// encode objects, arrays and special \0=false and \1=true values.	574	// encode objects, arrays and special \0=false and \1=true values.
249	static void	575	static void
250	encode_rv (enc_t *enc, SV *sv)	576	encode_rv (enc_t *enc, SV *sv)
251	{	577	{
252	svtype svt;
253
254	SvGETMAGIC (sv);	578	SvGETMAGIC (sv);
		579
255	svt = SvTYPE (sv);	580	svtype svt = SvTYPE (sv);
256		581
257	if (ecb_expect_false (SvOBJECT (sv)))	582	if (ecb_expect_false (SvOBJECT (sv)))
258	{	583	{
259	HV *boolean_stash = !CBOR_SLOW || cbor_boolean_stash	584	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
260	? cbor_boolean_stash	585	? types_boolean_stash
261	: 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);
262	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	590	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
263	? cbor_tagged_stash	591	? cbor_tagged_stash
264	: gv_stashpv ("CBOR::XS::Tagged" , 1);	592	: gv_stashpv ("CBOR::XS::Tagged" , 1);
265		593
		594	HV *stash = SvSTASH (sv);
		595
266	if (SvSTASH (sv) == boolean_stash)	596	if (stash == boolean_stash)
267	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	}
268	else if (SvSTASH (sv) == tagged_stash)	606	else if (stash == tagged_stash)
269	{	607	{
270	if (svt != SVt_PVAV)	608	if (svt != SVt_PVAV)
271	croak ("encountered CBOR::XS::Tagged object that isn't an array");	609	croak ("encountered CBOR::XS::Tagged object that isn't an array");
272		610
		611	switch (av_len ((AV *)sv))
		612	{
		613	case 2-1:
		614	// actually a tagged value
273	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	615	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
274	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;
275	}	645	}
276	else	646	else
277	{	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);
278	// 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
279	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
280
281	if (to_cbor)
282	{
283	dSP;
284
285	ENTER; SAVETMPS; PUSHMARK (SP);
286	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	669	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
287		670
288	// calling with G_SCALAR ensures that we always get a 1 return value
289	PUTBACK;	671	PUTBACK;
		672	// G_SCALAR ensures that return value is 1
290	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	673	call_sv ((SV *)GvCV (method), G_SCALAR);
291	SPAGAIN;	674	SPAGAIN;
292		675
293	// catch this surprisingly common error	676	// catch this surprisingly common error
294	if (SvROK (TOPs) && SvRV (TOPs) == sv)	677	if (SvROK (TOPs) && SvRV (TOPs) == sv)
295	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	678	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
296		679
297	sv = POPs;	680	encode_sv (enc, POPs);
		681
298	PUTBACK;	682	PUTBACK;
299		683
300	encode_sv (enc, sv);
301
302	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;
303	}	716	}
		717
		718	PUTBACK;
		719
		720	FREETMPS; LEAVE;
		721	}
304	else	722	else
305	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",
306	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	724	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
307	}
308	}	725	}
309	else if (svt == SVt_PVHV)	726	else if (svt == SVt_PVHV)
310	encode_hv (enc, (HV *)sv);	727	encode_hv (enc, (HV *)sv);
311	else if (svt == SVt_PVAV)	728	else if (svt == SVt_PVAV)
312	encode_av (enc, (AV *)sv);	729	encode_av (enc, (AV *)sv);
313	else if (svt < SVt_PVAV)
314	{
315	STRLEN len = 0;
316	char *pv = svt ? SvPV (sv, len) : 0;
317
318	if (len == 1 && *pv == '1')
319	encode_ch (enc, 0xe0 | 21);
320	else if (len == 1 && *pv == '0')
321	encode_ch (enc, 0xe0 | 20);
322	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
323	encode_ch (enc, 0xe0 | 23);
324	else
325	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
326	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
327	}
328	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
329	encode_ch (enc, 0xe0 | 23);
330	else	730	else
331	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	731	{
332	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	732	encode_tag (enc, CBOR_TAG_INDIRECTION);
		733	encode_sv (enc, sv);
		734	}
333	}	735	}
334		736
335	static void	737	static void
336	encode_nv (enc_t *enc, SV *sv)	738	encode_nv (enc_t *enc, SV *sv)
337	{	739	{
338	double nv = SvNVX (sv);	740	double nv = SvNVX (sv);
339		741
340	need (enc, 9);	742	need (enc, 9);
341		743
342	if (ecb_expect_false (nv == (U32)nv))	744	if (ecb_expect_false (nv == (NV)(U32)nv))
343	encode_uint (enc, 0x00, (U32)nv);	745	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
344	//TODO: maybe I32?	746	//TODO: maybe I32?
345	else if (ecb_expect_false (nv == (float)nv))	747	else if (ecb_expect_false (nv == (float)nv))
346	{	748	encode_float32 (enc, nv);
347	uint32_t fp = ecb_float_to_binary32 (nv);
348
349	*enc->cur++ = 0xe0 | 26;
350
351	if (!ecb_big_endian ())
352	fp = ecb_bswap32 (fp);
353
354	memcpy (enc->cur, &fp, 4);
355	enc->cur += 4;
356	}
357	else	749	else
358	{	750	encode_float64 (enc, nv);
359	uint64_t fp = ecb_double_to_binary64 (nv);
360
361	*enc->cur++ = 0xe0 | 27;
362
363	if (!ecb_big_endian ())
364	fp = ecb_bswap64 (fp);
365
366	memcpy (enc->cur, &fp, 8);
367	enc->cur += 8;
368	}
369	}	751	}
370		752
371	static void	753	static void
372	encode_sv (enc_t *enc, SV *sv)	754	encode_sv (enc_t *enc, SV *sv)
373	{	755	{
…		…
375		757
376	if (SvPOKp (sv))	758	if (SvPOKp (sv))
377	{	759	{
378	STRLEN len;	760	STRLEN len;
379	char *str = SvPV (sv, len);	761	char *str = SvPV (sv, len);
380	encode_str (enc, SvUTF8 (sv), str, len);	762	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
381	}	763	}
382	else if (SvNOKp (sv))	764	else if (SvNOKp (sv))
383	encode_nv (enc, sv);	765	encode_nv (enc, sv);
384	else if (SvIOKp (sv))	766	else if (SvIOKp (sv))
385	{	767	encode_int (enc, sv);
386	if (SvIsUV (sv))
387	encode_uint (enc, 0x00, SvUVX (sv));
388	else if (SvIVX (sv) >= 0)
389	encode_uint (enc, 0x00, SvIVX (sv));
390	else
391	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
392	}
393	else if (SvROK (sv))	768	else if (SvROK (sv))
394	encode_rv (enc, SvRV (sv));	769	encode_rv (enc, SvRV (sv));
395	else if (!SvOK (sv))	770	else if (!SvOK (sv))
396	encode_ch (enc, 0xe0 | 22);	771	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
397	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	772	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
398	encode_ch (enc, 0xe0 | 23);	773	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
399	else	774	else
400	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",
401	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	776	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
402	}	777	}
403		778
404	static SV *	779	static SV *
405	encode_cbor (SV *scalar, CBOR *cbor)	780	encode_cbor (SV *scalar, CBOR *cbor)
406	{	781	{
407	enc_t enc;	782	enc_t enc = { 0 };
408		783
409	enc.cbor = *cbor;	784	enc.cbor = *cbor;
410	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	785	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
411	enc.cur = SvPVX (enc.sv);	786	enc.cur = SvPVX (enc.sv);
412	enc.end = SvEND (enc.sv);	787	enc.end = SvEND (enc.sv);
413	enc.depth = 0;
414		788
415	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
416	encode_sv (&enc, scalar);	798	encode_sv (&enc, scalar);
417		799
418	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	800	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
419	*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
420		802
…		…
434	U8 *end; // end of input string	816	U8 *end; // end of input string
435	const char *err; // parse error, if != 0	817	const char *err; // parse error, if != 0
436	CBOR cbor;	818	CBOR cbor;
437	U32 depth; // recursion depth	819	U32 depth; // recursion depth
438	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
439	} dec_t;	825	} dec_t;
440		826
441	#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);
442		834
443	#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;
444		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
445	#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)
446	#define DEC_DEC_DEPTH --dec->depth	864	#define DEC_DEC_DEPTH --dec->depth
447		865
448	static UV	866	static UV
449	decode_uint (dec_t *dec)	867	decode_uint (dec_t *dec)
450	{	868	{
451	switch (*dec->cur & 31)	869	U8 m = *dec->cur & MINOR_MASK;
452	{	870	++dec->cur;
453	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
454	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
455	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
456	return *dec->cur++ & 31;
457		871
458	case 24:	872	if (ecb_expect_true (m < LENGTH_EXT1))
		873	return m;
		874	else if (ecb_expect_true (m == LENGTH_EXT1))
		875	{
459	WANT (2);	876	WANT (1);
460	dec->cur += 2;	877	dec->cur += 1;
461	return dec->cur[-1];	878	return dec->cur[-1];
462		879	}
463	case 25:	880	else if (ecb_expect_true (m == LENGTH_EXT2))
		881	{
464	WANT (3);	882	WANT (2);
465	dec->cur += 3;	883	dec->cur += 2;
466	return (((UV)dec->cur[-2]) << 8)	884	return (((UV)dec->cur[-2]) << 8)
467	| ((UV)dec->cur[-1]);	885	| ((UV)dec->cur[-1]);
468		886	}
469	case 26:	887	else if (ecb_expect_true (m == LENGTH_EXT4))
		888	{
470	WANT (5);	889	WANT (4);
471	dec->cur += 5;	890	dec->cur += 4;
472	return (((UV)dec->cur[-4]) << 24)	891	return (((UV)dec->cur[-4]) << 24)
473	| (((UV)dec->cur[-3]) << 16)	892	| (((UV)dec->cur[-3]) << 16)
474	| (((UV)dec->cur[-2]) << 8)	893	| (((UV)dec->cur[-2]) << 8)
475	| ((UV)dec->cur[-1]);	894	| ((UV)dec->cur[-1]);
476		895	}
477	case 27:	896	else if (ecb_expect_true (m == LENGTH_EXT8))
		897	{
478	WANT (9);	898	WANT (8);
479	dec->cur += 9;	899	dec->cur += 8;
		900
		901	return
		902	#if UVSIZE < 8
		903	0
		904	#else
480	return (((UV)dec->cur[-8]) << 56)	905	(((UV)dec->cur[-8]) << 56)
481	| (((UV)dec->cur[-7]) << 48)	906	| (((UV)dec->cur[-7]) << 48)
482	| (((UV)dec->cur[-6]) << 40)	907	| (((UV)dec->cur[-6]) << 40)
483	| (((UV)dec->cur[-5]) << 32)	908	| (((UV)dec->cur[-5]) << 32)
		909	#endif
484	| (((UV)dec->cur[-4]) << 24)	910	| (((UV)dec->cur[-4]) << 24)
485	| (((UV)dec->cur[-3]) << 16)	911	| (((UV)dec->cur[-3]) << 16)
486	| (((UV)dec->cur[-2]) << 8)	912	| (((UV)dec->cur[-2]) << 8)
487	| ((UV)dec->cur[-1]);	913	| ((UV)dec->cur[-1]);
488		914	}
489	default:	915	else
490	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	916	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
491	}
492		917
493	fail:	918	fail:
494	return 0;	919	return 0;
495	}	920	}
496		921
…		…
501	{	926	{
502	AV *av = newAV ();	927	AV *av = newAV ();
503		928
504	DEC_INC_DEPTH;	929	DEC_INC_DEPTH;
505		930
506	if ((*dec->cur & 31) == 31)	931	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
507	{	932	{
508	++dec->cur;	933	++dec->cur;
509		934
510	for (;;)	935	for (;;)
511	{	936	{
512	WANT (1);	937	WANT (1);
513		938
514	if (*dec->cur == (0xe0 | 31))	939	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
515	{	940	{
516	++dec->cur;	941	++dec->cur;
517	break;	942	break;
518	}	943	}
519		944
520	av_push (av, decode_sv (dec));	945	av_push (av, decode_sv (dec));
521	}	946	}
522	}	947	}
523	else	948	else
524	{	949	{
525	int i, len = decode_uint (dec);	950	UV i, len = decode_uint (dec);
526		951
		952	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
527	av_fill (av, len - 1);	953	av_fill (av, len - 1);
528		954
529	for (i = 0; i < len; ++i)	955	for (i = 0; i < len; ++i)
530	AvARRAY (av)[i] = decode_sv (dec);	956	AvARRAY (av)[i] = decode_sv (dec);
531	}	957	}
532		958
533	DEC_DEC_DEPTH;	959	DEC_DEC_DEPTH;
534	return newRV_noinc ((SV *)av);	960	return newRV_noinc ((SV *)av);
535		961
536	fail:	962	fail:
537	SvREFCNT_dec (av);	963	SvREFCNT_dec_NN (av);
538	DEC_DEC_DEPTH;	964	DEC_DEC_DEPTH;
539	return &PL_sv_undef;	965	return &PL_sv_undef;
540	}	966	}
541		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
542	static SV *	1042	static SV *
543	decode_hv (dec_t *dec)	1043	decode_hv (dec_t *dec)
544	{	1044	{
545	HV *hv = newHV ();	1045	HV *hv = newHV ();
546		1046
547	DEC_INC_DEPTH;	1047	DEC_INC_DEPTH;
548		1048
549	if ((*dec->cur & 31) == 31)	1049	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
550	{	1050	{
551	++dec->cur;	1051	++dec->cur;
552		1052
553	for (;;)	1053	for (;;)
554	{	1054	{
555	WANT (1);	1055	WANT (1);
556		1056
557	if (*dec->cur == (0xe0 | 31))	1057	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
558	{	1058	{
559	++dec->cur;	1059	++dec->cur;
560	break;	1060	break;
561	}	1061	}
562		1062
563	SV *k = decode_sv (dec);	1063	decode_he (dec, hv);
564	SV *v = decode_sv (dec);
565
566	hv_store_ent (hv, k, v, 0);
567	}	1064	}
568	}	1065	}
569	else	1066	else
570	{	1067	{
571	int len = decode_uint (dec);	1068	UV pairs = decode_uint (dec);
572		1069
		1070	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1071
573	while (len--)	1072	while (pairs--)
574	{	1073	decode_he (dec, hv);
575	SV *k = decode_sv (dec);
576	SV *v = decode_sv (dec);
577
578	hv_store_ent (hv, k, v, 0);
579	}
580	}	1074	}
581		1075
582	DEC_DEC_DEPTH;	1076	DEC_DEC_DEPTH;
583	return newRV_noinc ((SV *)hv);	1077	return newRV_noinc ((SV *)hv);
584		1078
585	fail:	1079	fail:
586	SvREFCNT_dec (hv);	1080	SvREFCNT_dec_NN (hv);
587	DEC_DEC_DEPTH;	1081	DEC_DEC_DEPTH;
588	return &PL_sv_undef;	1082	return &PL_sv_undef;
589	}	1083	}
590		1084
591	static SV *	1085	static SV *
592	decode_str (dec_t *dec, int utf8)	1086	decode_str (dec_t *dec, int utf8)
593	{	1087	{
594	SV *sv = 0;	1088	SV *sv = 0;
595		1089
596	if ((*dec->cur & 31) == 31)	1090	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
597	{	1091	{
		1092	// indefinite length strings
598	++dec->cur;	1093	++dec->cur;
599		1094
		1095	U8 major = *dec->cur & MAJOR_MISC;
		1096
600	sv = newSVpvn ("", 0);	1097	sv = newSVpvn ("", 0);
601		1098
602	// not very fast, and certainly not robust against illegal input
603	for (;;)	1099	for (;;)
604	{	1100	{
605	WANT (1);	1101	WANT (1);
606		1102
607	if (*dec->cur == (0xe0 | 31))	1103	if ((*dec->cur - major) > LENGTH_EXT8)
		1104	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
608	{	1105	{
609	++dec->cur;	1106	++dec->cur;
610	break;	1107	break;
611	}	1108	}
		1109	else
		1110	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
612		1111
613	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;
614	}	1117	}
615	}	1118	}
616	else	1119	else
617	{	1120	{
618	STRLEN len = decode_uint (dec);	1121	STRLEN len = decode_uint (dec);
619		1122
620	WANT (len);	1123	WANT (len);
621	sv = newSVpvn (dec->cur, len);	1124	sv = newSVpvn (dec->cur, len);
622	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));
623	}	1130	}
624		1131
625	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
626	SvUTF8_on (sv);	1138	SvUTF8_on (sv);
		1139	}
627		1140
628	return sv;	1141	return sv;
629		1142
630	fail:	1143	fail:
631	SvREFCNT_dec (sv);	1144	SvREFCNT_dec (sv);
…		…
633	}	1146	}
634		1147
635	static SV *	1148	static SV *
636	decode_tagged (dec_t *dec)	1149	decode_tagged (dec_t *dec)
637	{	1150	{
		1151	SV *sv = 0;
638	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:
639	SV *sv = decode_sv (dec);	1159	sv = decode_sv (dec);
		1160	break;
640		1161
641	if (tag == CBOR_TAG_MAGIC) // 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
642	return sv;	1369	return sv;
643		1370
644	AV *av = newAV ();	1371	fail:
645	av_push (av, newSVuv (tag));	1372	SvREFCNT_dec (sv);
646	av_push (av, sv);	1373	return &PL_sv_undef;
647
648	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
649	? cbor_tagged_stash
650	: gv_stashpv ("CBOR::XS::Tagged" , 1);
651
652	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);
653	}	1374	}
654		1375
655	static SV *	1376	static SV *
656	decode_sv (dec_t *dec)	1377	decode_sv (dec_t *dec)
657	{	1378	{
658	WANT (1);	1379	WANT (1);
659		1380
660	switch (*dec->cur >> 5)	1381	switch (*dec->cur >> MAJOR_SHIFT)
661	{	1382	{
662	case 0: // unsigned int	1383	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
663	return newSVuv (decode_uint (dec));	1384	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
664	case 1: // negative int	1385	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
665	return newSViv (-1 - (IV)decode_uint (dec));	1386	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
666	case 2: // octet string	1387	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
667	return decode_str (dec, 0);	1388	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
668	case 3: // utf-8 string	1389	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
669	return decode_str (dec, 1);	1390
670	case 4: // array	1391	case MAJOR_MISC >> MAJOR_SHIFT:
671	return decode_av (dec);
672	case 5: // map
673	return decode_hv (dec);
674	case 6: // tag
675	return decode_tagged (dec);
676	case 7: // misc
677	switch (*dec->cur++ & 31)	1392	switch (*dec->cur++ & MINOR_MASK)
678	{	1393	{
679	case 20:	1394	case SIMPLE_FALSE:
680	#if CBOR_SLOW	1395	#if CBOR_SLOW
681	cbor_false = get_bool ("CBOR::XS::false");	1396	types_false = get_bool ("Types::Serialiser::false");
682	#endif	1397	#endif
683	return newSVsv (cbor_false);	1398	return newSVsv (types_false);
684	case 21:	1399	case SIMPLE_TRUE:
685	#if CBOR_SLOW	1400	#if CBOR_SLOW
686	cbor_true = get_bool ("CBOR::XS::true");	1401	types_true = get_bool ("Types::Serialiser::true");
687	#endif	1402	#endif
688	return newSVsv (cbor_true);	1403	return newSVsv (types_true);
689	case 22:	1404	case SIMPLE_NULL:
690	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);
691		1411
692	case 25:	1412	case MISC_FLOAT16:
693	{	1413	{
694	WANT (2);	1414	WANT (2);
695		1415
696	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1416	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
697	dec->cur += 2;	1417	dec->cur += 2;
698		1418
699	return newSVnv (ecb_binary16_to_float (fp));	1419	return newSVnv (ecb_binary16_to_float (fp));
700	}	1420	}
701		1421
702	case 26:	1422	case MISC_FLOAT32:
703	{	1423	{
704	uint32_t fp;	1424	uint32_t fp;
705	WANT (4);	1425	WANT (4);
706	memcpy (&fp, dec->cur, 4);	1426	memcpy (&fp, dec->cur, 4);
707	dec->cur += 4;	1427	dec->cur += 4;
…		…
710	fp = ecb_bswap32 (fp);	1430	fp = ecb_bswap32 (fp);
711		1431
712	return newSVnv (ecb_binary32_to_float (fp));	1432	return newSVnv (ecb_binary32_to_float (fp));
713	}	1433	}
714		1434
715	case 27:	1435	case MISC_FLOAT64:
716	{	1436	{
717	uint64_t fp;	1437	uint64_t fp;
718	WANT (8);	1438	WANT (8);
719	memcpy (&fp, dec->cur, 8);	1439	memcpy (&fp, dec->cur, 8);
720	dec->cur += 8;	1440	dec->cur += 8;
…		…
723	fp = ecb_bswap64 (fp);	1443	fp = ecb_bswap64 (fp);
724		1444
725	return newSVnv (ecb_binary64_to_double (fp));	1445	return newSVnv (ecb_binary64_to_double (fp));
726	}	1446	}
727		1447
728	// 0..19 unassigned	1448	// 0..19 unassigned simple
729	// 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
730	default:	1452	default:
731	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1453	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
732	}	1454	}
733		1455
734	break;	1456	break;
735	}	1457	}
736		1458
…		…
739	}	1461	}
740		1462
741	static SV *	1463	static SV *
742	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1464	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
743	{	1465	{
744	dec_t dec;	1466	dec_t dec = { 0 };
745	SV *sv;	1467	SV *sv;
		1468	STRLEN len;
		1469	char *data = SvPVbyte (string, len);
746		1470
747	/* work around bugs in 5.10 where manipulating magic values
748	* makes perl ignore the magic in subsequent accesses.
749	* also make a copy of non-PV values, to get them into a clean
750	* state (SvPV should do that, but it's buggy, see below).
751	*/
752	/*SvGETMAGIC (string);*/
753	if (SvMAGICAL (string) || !SvPOK (string))
754	string = sv_2mortal (newSVsv (string));
755
756	SvUPGRADE (string, SVt_PV);
757
758	/* work around a bug in perl 5.10, which causes SvCUR to fail an
759	* assertion with -DDEBUGGING, although SvCUR is documented to
760	* return the xpv_cur field which certainly exists after upgrading.
761	* according to nicholas clark, calling SvPOK fixes this.
762	* But it doesn't fix it, so try another workaround, call SvPV_nolen
763	* and hope for the best.
764	* Damnit, SvPV_nolen still trips over yet another assertion. This
765	* assertion business is seriously broken, try yet another workaround
766	* for the broken -DDEBUGGING.
767	*/
768	{
769	#ifdef DEBUGGING
770	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
771	#else
772	STRLEN offset = SvCUR (string);
773	#endif
774
775	if (offset > cbor->max_size && cbor->max_size)	1471	if (len > cbor->max_size && cbor->max_size)
776	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1472	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
777	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1473	(unsigned long)len, (unsigned long)cbor->max_size);
778	}
779
780	sv_utf8_downgrade (string, 0);
781		1474
782	dec.cbor = *cbor;	1475	dec.cbor = *cbor;
783	dec.cur = (U8 *)SvPVX (string);	1476	dec.cur = (U8 *)data;
784	dec.end = (U8 *)SvEND (string);	1477	dec.end = (U8 *)data + len;
785	dec.err = 0;
786	dec.depth = 0;
787		1478
788	sv = decode_sv (&dec);	1479	sv = decode_sv (&dec);
789		1480
790	if (offset_return)	1481	if (offset_return)
791	*offset_return = dec.cur;	1482	*offset_return = dec.cur;
…		…
794	if (dec.cur != dec.end && !dec.err)	1485	if (dec.cur != dec.end && !dec.err)
795	dec.err = "garbage after CBOR object";	1486	dec.err = "garbage after CBOR object";
796		1487
797	if (dec.err)	1488	if (dec.err)
798	{	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
799	SvREFCNT_dec (sv);	1501	SvREFCNT_dec_NN (sv);
		1502
		1503	if (dec.err_sv)
		1504	sv_2mortal (dec.err_sv);
		1505
800	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);
801	}	1507	}
802		1508
803	sv = sv_2mortal (sv);	1509	sv = sv_2mortal (sv);
804		1510
805	return sv;	1511	return sv;
806	}	1512	}
807		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
808	/////////////////////////////////////////////////////////////////////////////	1639	/////////////////////////////////////////////////////////////////////////////
809	// XS interface functions	1640	// XS interface functions
810		1641
811	MODULE = CBOR::XS PACKAGE = CBOR::XS	1642	MODULE = CBOR::XS PACKAGE = CBOR::XS
812		1643
813	BOOT:	1644	BOOT:
814	{	1645	{
815	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1646	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
816	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);
817	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);	1647	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
818		1648
819	cbor_true = get_bool ("CBOR::XS::true");	1649	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
820	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));
821	}	1662	}
822		1663
823	PROTOTYPES: DISABLE	1664	PROTOTYPES: DISABLE
824		1665
825	void CLONE (...)	1666	void CLONE (...)
826	CODE:	1667	CODE:
827	cbor_stash = 0;	1668	cbor_stash = 0;
828	cbor_boolean_stash = 0;
829	cbor_tagged_stash = 0;	1669	cbor_tagged_stash = 0;
		1670	types_error_stash = 0;
		1671	types_boolean_stash = 0;
830		1672
831	void new (char *klass)	1673	void new (char *klass)
832	PPCODE:	1674	PPCODE:
833	{	1675	{
834	SV *pv = NEWSV (0, sizeof (CBOR));	1676	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
840	)));	1682	)));
841	}	1683	}
842		1684
843	void shrink (CBOR *self, int enable = 1)	1685	void shrink (CBOR *self, int enable = 1)
844	ALIAS:	1686	ALIAS:
845	shrink = F_SHRINK	1687	shrink = F_SHRINK
846	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
847	PPCODE:	1697	PPCODE:
848	{	1698	{
849	if (enable)	1699	if (enable)
850	self->flags |= ix;	1700	self->flags |= ix;
851	else	1701	else
…		…
854	XPUSHs (ST (0));	1704	XPUSHs (ST (0));
855	}	1705	}
856		1706
857	void get_shrink (CBOR *self)	1707	void get_shrink (CBOR *self)
858	ALIAS:	1708	ALIAS:
859	get_shrink = F_SHRINK	1709	get_shrink = F_SHRINK
860	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
861	PPCODE:	1719	PPCODE:
862	XPUSHs (boolSV (self->flags & ix));	1720	XPUSHs (boolSV (self->flags & ix));
863		1721
864	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1722	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
865	PPCODE:	1723	PPCODE:
…		…
881	CODE:	1739	CODE:
882	RETVAL = self->max_size;	1740	RETVAL = self->max_size;
883	OUTPUT:	1741	OUTPUT:
884	RETVAL	1742	RETVAL
885		1743
886	#if 0 //TODO	1744	void filter (CBOR *self, SV *filter = 0)
887
888	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
889	PPCODE:	1745	PPCODE:
890	{
891	SvREFCNT_dec (self->cb_object);	1746	SvREFCNT_dec (self->filter);
892	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1747	self->filter = filter ? newSVsv (filter) : filter;
893
894	XPUSHs (ST (0));	1748	XPUSHs (ST (0));
895	}
896		1749
897	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1750	SV *get_filter (CBOR *self)
898	PPCODE:	1751	CODE:
899	{	1752	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
900	if (!self->cb_sk_object)	1753	OUTPUT:
901	self->cb_sk_object = newHV ();	1754	RETVAL
902
903	if (SvOK (cb))
904	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
905	else
906	{
907	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
908
909	if (!HvKEYS (self->cb_sk_object))
910	{
911	SvREFCNT_dec (self->cb_sk_object);
912	self->cb_sk_object = 0;
913	}
914	}
915
916	XPUSHs (ST (0));
917	}
918
919	#endif
920		1755
921	void encode (CBOR *self, SV *scalar)	1756	void encode (CBOR *self, SV *scalar)
922	PPCODE:	1757	PPCODE:
923	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1758	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
924	XPUSHs (scalar);	1759	XPUSHs (scalar);
…		…
937	EXTEND (SP, 2);	1772	EXTEND (SP, 2);
938	PUSHs (sv);	1773	PUSHs (sv);
939	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1774	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
940	}	1775	}
941		1776
942	#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	}
943		1828
944	void DESTROY (CBOR *self)	1829	void DESTROY (CBOR *self)
945	CODE:	1830	PPCODE:
946	SvREFCNT_dec (self->cb_sk_object);	1831	cbor_free (self);
947	SvREFCNT_dec (self->cb_object);
948
949	#endif
950		1832
951	PROTOTYPES: ENABLE	1833	PROTOTYPES: ENABLE
952		1834
953	void encode_cbor (SV *scalar)	1835	void encode_cbor (SV *scalar)
		1836	ALIAS:
		1837	encode_cbor = 0
		1838	encode_cbor_sharing = F_ALLOW_SHARING
954	PPCODE:	1839	PPCODE:
955	{	1840	{
956	CBOR cbor;	1841	CBOR cbor;
957	cbor_init (&cbor);	1842	cbor_init (&cbor);
		1843	cbor.flags |= ix;
958	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1844	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
959	XPUSHs (scalar);	1845	XPUSHs (scalar);
960	}	1846	}
961		1847
962	void decode_cbor (SV *cborstr)	1848	void decode_cbor (SV *cborstr)
…		…
966	cbor_init (&cbor);	1852	cbor_init (&cbor);
967	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1853	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
968	XPUSHs (cborstr);	1854	XPUSHs (cborstr);
969	}	1855	}
970		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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