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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.15 by root, Tue Oct 29 18:37:31 2013 UTC vs.
Revision 1.79 by root, Fri Sep 8 06:05:01 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	// compatibility with perl <5.18	16	// compatibility with perl <5.18
15	#ifndef HvNAMELEN_get	17	#ifndef HvNAMELEN_get
16	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))	18	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
…		…
19	# define HvNAMELEN(hv) HvNAMELEN_get (hv)	21	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
20	#endif	22	#endif
21	#ifndef HvNAMEUTF8	23	#ifndef HvNAMEUTF8
22	# define HvNAMEUTF8(hv) 0	24	# define HvNAMEUTF8(hv) 0
23	#endif	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	};
24		72
25	// known tags	73	// known tags
26	enum cbor_tag	74	enum cbor_tag
27	{	75	{
28	// inofficial extensions (pending iana registration)	76	// extensions
29	CBOR_TAG_PERL_OBJECT = 256,	77	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
30	CBOR_TAG_GENERIC_OBJECT = 257,	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
31		84
32	// rfc7049	85	// rfc7049
33	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	86	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
34	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	87	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
35	CBOR_TAG_POS_BIGNUM = 2, // byte string	88	CBOR_TAG_POS_BIGNUM = 2, // byte string
36	CBOR_TAG_NEG_BIGNUM = 3, // byte string	89	CBOR_TAG_NEG_BIGNUM = 3, // byte string
37	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	90	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
38	CBOR_TAG_BIGFLOAT = 5, // array	91	CBOR_TAG_BIGFLOAT = 5, // array
39		92
40	CBOR_TAG_CONV_B64U = 21, // base64url, any	93	CBOR_TAG_CONV_B64U = 21, // base64url, any
41	CBOR_TAG_CONV_B64 = 22, // base64, any	94	CBOR_TAG_CONV_B64 = 22, // base64, any
42	CBOR_TAG_CONV_HEX = 23, // base16, any	95	CBOR_TAG_CONV_HEX = 23, // base16, any
43	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	96	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
44		97
45	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	98	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
46	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	99	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
47	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	100	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
48	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	101	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
49	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	102	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
50		103
51	CBOR_TAG_MAGIC = 55799 // self-describe cbor	104	CBOR_TAG_MAGIC = 55799, // self-describe cbor
52	};	105	};
53		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
54	#define F_SHRINK 0x00000200UL	121	#define F_SHRINK 0x00000001UL
55	#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_FORBID_OBJECTS 0x00000010UL
		126	#define F_PACK_STRINGS 0x00000020UL
		127	#define F_TEXT_KEYS 0x00000040UL
		128	#define F_TEXT_STRINGS 0x00000080UL
		129	#define F_VALIDATE_UTF8 0x00000100UL
56		130
57	#define INIT_SIZE 32 // initial scalar size to be allocated	131	#define INIT_SIZE 32 // initial scalar size to be allocated
58		132
59	#define SB do {	133	#define SB do {
60	#define SE } while (0)	134	#define SE } while (0)
…		…
72	# define CBOR_SLOW 0	146	# define CBOR_SLOW 0
73	# define CBOR_STASH cbor_stash	147	# define CBOR_STASH cbor_stash
74	#endif	148	#endif
75		149
76	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::	150	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
77	static SV *types_true, *types_false, *types_error, *sv_cbor;	151	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
78		152
79	typedef struct {	153	typedef struct {
80	U32 flags;	154	U32 flags;
81	U32 max_depth;	155	U32 max_depth;
82	STRLEN max_size;	156	STRLEN max_size;
		157	SV *filter;
		158
		159	// for the incremental parser
		160	STRLEN incr_pos; // the current offset into the text
		161	STRLEN incr_need; // minimum bytes needed to decode
		162	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
83	} CBOR;	163	} CBOR;
84		164
85	ecb_inline void	165	ecb_inline void
86	cbor_init (CBOR *cbor)	166	cbor_init (CBOR *cbor)
87	{	167	{
88	Zero (cbor, 1, CBOR);	168	Zero (cbor, 1, CBOR);
89	cbor->max_depth = 512;	169	cbor->max_depth = 512;
		170	}
		171
		172	ecb_inline void
		173	cbor_free (CBOR *cbor)
		174	{
		175	SvREFCNT_dec (cbor->filter);
		176	SvREFCNT_dec (cbor->incr_count);
90	}	177	}
91		178
92	/////////////////////////////////////////////////////////////////////////////	179	/////////////////////////////////////////////////////////////////////////////
93	// utility functions	180	// utility functions
94		181
…		…
116	SvPV_renew (sv, SvCUR (sv) + 1);	203	SvPV_renew (sv, SvCUR (sv) + 1);
117	#endif	204	#endif
118	}	205	}
119	}	206	}
120		207
121	/////////////////////////////////////////////////////////////////////////////	208	// minimum length of a string to be registered for stringref
122	// fp hell	209	ecb_inline STRLEN
123		210	minimum_string_length (UV idx)
124	//TODO	211	{
		212	return idx <= 23 ? 3
		213	: idx <= 0xffU ? 4
		214	: idx <= 0xffffU ? 5
		215	: idx <= 0xffffffffU ? 7
		216	: 11;
		217	}
125		218
126	/////////////////////////////////////////////////////////////////////////////	219	/////////////////////////////////////////////////////////////////////////////
127	// encoder	220	// encoder
128		221
129	// structure used for encoding CBOR	222	// structure used for encoding CBOR
…		…
132	char *cur; // SvPVX (sv) + current output position	225	char *cur; // SvPVX (sv) + current output position
133	char *end; // SvEND (sv)	226	char *end; // SvEND (sv)
134	SV *sv; // result scalar	227	SV *sv; // result scalar
135	CBOR cbor;	228	CBOR cbor;
136	U32 depth; // recursion level	229	U32 depth; // recursion level
		230	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		231	UV stringref_idx;
		232	HV *shareable; // ptr => index, or 0
		233	UV shareable_idx;
137	} enc_t;	234	} enc_t;
138		235
139	ecb_inline void	236	ecb_inline void
140	need (enc_t *enc, STRLEN len)	237	need (enc_t *enc, STRLEN len)
141	{	238	{
142	if (ecb_expect_false (enc->cur + len >= enc->end))	239	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
143	{	240	{
144	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	241	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
145	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	242	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
146	enc->cur = SvPVX (enc->sv) + cur;	243	enc->cur = SvPVX (enc->sv) + cur;
147	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	244	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
148	}	245	}
149	}	246	}
150		247
		248	static void encode_sv (enc_t *enc, SV *sv);
		249
151	ecb_inline void	250	ecb_inline void
152	encode_ch (enc_t *enc, char ch)	251	encode_ch (enc_t *enc, char ch)
153	{	252	{
154	need (enc, 1);	253	need (enc, 1);
155	*enc->cur++ = ch;	254	*enc->cur++ = ch;
156	}	255	}
157		256
		257	// used for tags, intregers, element counts and so on
158	static void	258	static void
159	encode_uint (enc_t *enc, int major, UV len)	259	encode_uint (enc_t *enc, int major, UV len)
160	{	260	{
161	need (enc, 9);	261	need (enc, 9);
162		262
163	if (len < 24)	263	if (ecb_expect_true (len < LENGTH_EXT1))
164	*enc->cur++ = major | len;	264	*enc->cur++ = major | len;
165	else if (len <= 0xff)	265	else if (ecb_expect_true (len <= 0xffU))
166	{	266	{
167	*enc->cur++ = major | 24;	267	*enc->cur++ = major | LENGTH_EXT1;
168	*enc->cur++ = len;	268	*enc->cur++ = len;
169	}	269	}
170	else if (len <= 0xffff)	270	else if (len <= 0xffffU)
171	{	271	{
172	*enc->cur++ = major | 25;	272	*enc->cur++ = major | LENGTH_EXT2;
173	*enc->cur++ = len >> 8;	273	*enc->cur++ = len >> 8;
174	*enc->cur++ = len;	274	*enc->cur++ = len;
175	}	275	}
176	else if (len <= 0xffffffff)	276	else if (len <= 0xffffffffU)
177	{	277	{
178	*enc->cur++ = major | 26;	278	*enc->cur++ = major | LENGTH_EXT4;
179	*enc->cur++ = len >> 24;	279	*enc->cur++ = len >> 24;
180	*enc->cur++ = len >> 16;	280	*enc->cur++ = len >> 16;
181	*enc->cur++ = len >> 8;	281	*enc->cur++ = len >> 8;
182	*enc->cur++ = len;	282	*enc->cur++ = len;
183	}	283	}
184	else	284	else
185	{	285	{
186	*enc->cur++ = major | 27;	286	*enc->cur++ = major | LENGTH_EXT8;
187	*enc->cur++ = len >> 56;	287	*enc->cur++ = len >> 56;
188	*enc->cur++ = len >> 48;	288	*enc->cur++ = len >> 48;
189	*enc->cur++ = len >> 40;	289	*enc->cur++ = len >> 40;
190	*enc->cur++ = len >> 32;	290	*enc->cur++ = len >> 32;
191	*enc->cur++ = len >> 24;	291	*enc->cur++ = len >> 24;
…		…
193	*enc->cur++ = len >> 8;	293	*enc->cur++ = len >> 8;
194	*enc->cur++ = len;	294	*enc->cur++ = len;
195	}	295	}
196	}	296	}
197		297
198	static void	298	// encodes a perl value into a CBOR integer
		299	ecb_inline void
		300	encode_int (enc_t *enc, SV *sv)
		301	{
		302	if (SvIsUV (sv))
		303	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
		304	else if (SvIVX (sv) >= 0)
		305	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
		306	else
		307	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
		308	}
		309
		310	ecb_inline void
		311	encode_tag (enc_t *enc, UV tag)
		312	{
		313	encode_uint (enc, MAJOR_TAG, tag);
		314	}
		315
		316	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		317	ecb_noinline static void
199	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	318	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
200	{	319	{
201	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	320	STRLEN ulen = len;
		321	U8 *p, *pend = (U8 *)str + len;
		322
		323	for (p = (U8 *)str; p < pend; ++p)
		324	ulen += *p >> 7; // count set high bits
		325
		326	encode_uint (enc, MAJOR_TEXT, ulen);
		327
		328	need (enc, ulen);
		329	for (p = (U8 *)str; p < pend; ++p)
		330	if (*p < 0x80)
		331	*enc->cur++ = *p;
		332	else
		333	{
		334	*enc->cur++ = 0xc0 + (*p >> 6);
		335	*enc->cur++ = 0x80 + (*p & 63);
		336	}
		337	}
		338
		339	ecb_inline void
		340	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		341	{
		342	if (ecb_expect_false (upgrade_utf8))
		343	if (!utf8)
		344	{
		345	encode_str_utf8 (enc, utf8, str, len);
		346	return;
		347	}
		348
		349	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
202	need (enc, len);	350	need (enc, len);
203	memcpy (enc->cur, str, len);	351	memcpy (enc->cur, str, len);
204	enc->cur += len;	352	enc->cur += len;
205	}	353	}
206		354
207	static void encode_sv (enc_t *enc, SV *sv);	355	ecb_inline void
		356	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		357	{
		358	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		359	{
		360	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		361
		362	if (SvOK (*svp))
		363	{
		364	// already registered, use stringref
		365	encode_tag (enc, CBOR_TAG_STRINGREF);
		366	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		367	return;
		368	}
		369	else if (len >= minimum_string_length (enc->stringref_idx))
		370	{
		371	// register only
		372	sv_setuv (*svp, enc->stringref_idx);
		373	++enc->stringref_idx;
		374	}
		375	}
		376
		377	encode_str (enc, upgrade_utf8, utf8, str, len);
		378	}
		379
		380	ecb_inline void
		381	encode_float16 (enc_t *enc, NV nv)
		382	{
		383	need (enc, 1+2);
		384
		385	*enc->cur++ = MAJOR_MISC | MISC_FLOAT16;
		386
		387	uint16_t fp = ecb_float_to_binary16 (nv);
		388
		389	if (!ecb_big_endian ())
		390	fp = ecb_bswap16 (fp);
		391
		392	memcpy (enc->cur, &fp, 2);
		393	enc->cur += 2;
		394	}
		395
		396	ecb_inline void
		397	encode_float32 (enc_t *enc, NV nv)
		398	{
		399	need (enc, 1+4);
		400
		401	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
		402
		403	uint32_t fp = ecb_float_to_binary32 (nv);
		404
		405	if (!ecb_big_endian ())
		406	fp = ecb_bswap32 (fp);
		407
		408	memcpy (enc->cur, &fp, 4);
		409	enc->cur += 4;
		410	}
		411
		412	ecb_inline void
		413	encode_float64 (enc_t *enc, NV nv)
		414	{
		415	need (enc, 1+8);
		416
		417	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
		418
		419	uint64_t fp = ecb_double_to_binary64 (nv);
		420
		421	if (!ecb_big_endian ())
		422	fp = ecb_bswap64 (fp);
		423
		424	memcpy (enc->cur, &fp, 8);
		425	enc->cur += 8;
		426	}
		427
		428	ecb_inline void
		429	encode_bool (enc_t *enc, int istrue)
		430	{
		431	encode_ch (enc, istrue ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		432	}
		433
		434	// encodes an arrayref containing key-value pairs as CBOR map
		435	ecb_inline void
		436	encode_array_as_map (enc_t *enc, SV *sv)
		437	{
		438	if (enc->depth >= enc->cbor.max_depth)
		439	croak (ERR_NESTING_EXCEEDED);
		440
		441	++enc->depth;
		442
		443	// as_map does error checking for us, but we re-check in case
		444	// things have changed.
		445
		446	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		447	croak ("CBOR::XS::as_map requires an array reference (did you change the array after calling as_map?)");
		448
		449	AV *av = (AV *)SvRV (sv);
		450	int i, len = av_len (av);
		451
		452	if (!(len & 1))
		453	croak ("CBOR::XS::as_map requires an even number of elements (did you change the array after calling as_map?)");
		454
		455	encode_uint (enc, MAJOR_MAP, (len + 1) >> 1);
		456
		457	for (i = 0; i <= len; ++i)
		458	{
		459	SV **svp = av_fetch (av, i, 0);
		460	encode_sv (enc, svp ? *svp : &PL_sv_undef);
		461	}
		462
		463	--enc->depth;
		464	}
		465
		466	ecb_inline void
		467	encode_forced (enc_t *enc, UV type, SV *sv)
		468	{
		469	switch (type)
		470	{
		471	case AS_CBOR:
		472	{
		473	STRLEN len;
		474	char *str = SvPVbyte (sv, len);
		475
		476	need (enc, len);
		477	memcpy (enc->cur, str, len);
		478	enc->cur += len;
		479	}
		480	break;
		481
		482	case AS_BYTES:
		483	{
		484	STRLEN len;
		485	char *str = SvPVbyte (sv, len);
		486	encode_strref (enc, 0, 0, str, len);
		487	}
		488	break;
		489
		490	case AS_TEXT:
		491	{
		492	STRLEN len;
		493	char *str = SvPVutf8 (sv, len);
		494	encode_strref (enc, 1, 1, str, len);
		495	}
		496	break;
		497
		498	case AS_INT: encode_int (enc, sv); break;
		499
		500	case AS_FLOAT16: encode_float16 (enc, SvNV (sv)); break;
		501	case AS_FLOAT32: encode_float32 (enc, SvNV (sv)); break;
		502	case AS_FLOAT64: encode_float64 (enc, SvNV (sv)); break;
		503
		504	case AS_MAP: encode_array_as_map (enc, sv); break;
		505
		506	default:
		507	croak ("encountered malformed CBOR::XS::Tagged object");
		508	}
		509	}
208		510
209	static void	511	static void
210	encode_av (enc_t *enc, AV *av)	512	encode_av (enc_t *enc, AV *av)
211	{	513	{
212	int i, len = av_len (av);	514	int i, len = av_len (av);
…		…
214	if (enc->depth >= enc->cbor.max_depth)	516	if (enc->depth >= enc->cbor.max_depth)
215	croak (ERR_NESTING_EXCEEDED);	517	croak (ERR_NESTING_EXCEEDED);
216		518
217	++enc->depth;	519	++enc->depth;
218		520
219	encode_uint (enc, 0x80, len + 1);	521	encode_uint (enc, MAJOR_ARRAY, len + 1);
220		522
		523	if (ecb_expect_false (SvMAGICAL (av)))
221	for (i = 0; i <= len; ++i)	524	for (i = 0; i <= len; ++i)
222	{	525	{
223	SV **svp = av_fetch (av, i, 0);	526	SV **svp = av_fetch (av, i, 0);
224	encode_sv (enc, svp ? *svp : &PL_sv_undef);	527	encode_sv (enc, svp ? *svp : &PL_sv_undef);
225	}	528	}
		529	else
		530	for (i = 0; i <= len; ++i)
		531	{
		532	SV *sv = AvARRAY (av)[i];
		533	encode_sv (enc, sv ? sv : &PL_sv_undef);
		534	}
226		535
227	--enc->depth;	536	--enc->depth;
228	}	537	}
229		538
230	static void	539	static void
…		…
238	++enc->depth;	547	++enc->depth;
239		548
240	int pairs = hv_iterinit (hv);	549	int pairs = hv_iterinit (hv);
241	int mg = SvMAGICAL (hv);	550	int mg = SvMAGICAL (hv);
242		551
243	if (mg)	552	if (ecb_expect_false (mg))
244	encode_ch (enc, 0xa0 | 31);	553	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
245	else	554	else
246	encode_uint (enc, 0xa0, pairs);	555	encode_uint (enc, MAJOR_MAP, pairs);
247		556
248	while ((he = hv_iternext (hv)))	557	while ((he = hv_iternext (hv)))
249	{	558	{
250	if (HeKLEN (he) == HEf_SVKEY)	559	if (HeKLEN (he) == HEf_SVKEY)
251	encode_sv (enc, HeSVKEY (he));	560	encode_sv (enc, HeSVKEY (he));
252	else	561	else
253	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	562	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
254		563
255	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	564	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
256	}	565	}
257		566
258	if (mg)	567	if (ecb_expect_false (mg))
259	encode_ch (enc, 0xe0 | 31);	568	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
260		569
261	--enc->depth;	570	--enc->depth;
262	}	571	}
263		572
264	// encode objects, arrays and special \0=false and \1=true values.	573	// encode objects, arrays and special \0=false and \1=true values.
265	static void	574	static void
266	encode_rv (enc_t *enc, SV *sv)	575	encode_rv (enc_t *enc, SV *sv)
267	{	576	{
268	svtype svt;
269
270	SvGETMAGIC (sv);	577	SvGETMAGIC (sv);
		578
271	svt = SvTYPE (sv);	579	svtype svt = SvTYPE (sv);
272		580
273	if (ecb_expect_false (SvOBJECT (sv)))	581	if (ecb_expect_false (SvOBJECT (sv)))
274	{	582	{
275	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash	583	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
276	? types_boolean_stash	584	? types_boolean_stash
…		…
281	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	589	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
282	? cbor_tagged_stash	590	? cbor_tagged_stash
283	: gv_stashpv ("CBOR::XS::Tagged" , 1);	591	: gv_stashpv ("CBOR::XS::Tagged" , 1);
284		592
285	HV *stash = SvSTASH (sv);	593	HV *stash = SvSTASH (sv);
286	GV *method;
287		594
288	if (stash == boolean_stash)	595	if (stash == boolean_stash)
289	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	596	{
		597	encode_bool (enc, SvIV (sv));
		598	return;
		599	}
290	else if (stash == error_stash)	600	else if (stash == error_stash)
291	encode_ch (enc, 0xe0 | 23);	601	{
		602	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		603	return;
		604	}
292	else if (stash == tagged_stash)	605	else if (stash == tagged_stash)
293	{	606	{
294	if (svt != SVt_PVAV)	607	if (svt != SVt_PVAV)
295	croak ("encountered CBOR::XS::Tagged object that isn't an array");	608	croak ("encountered CBOR::XS::Tagged object that isn't an array");
296		609
		610	switch (av_len ((AV *)sv))
		611	{
		612	case 2-1:
		613	// actually a tagged value
297	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	614	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
298	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));	615	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		616	break;
		617
		618	case 3-1:
		619	// a forced type [value, type, undef]
		620	encode_forced (enc, SvUV (*av_fetch ((AV *)sv, 1, 1)), *av_fetch ((AV *)sv, 0, 1));
		621	break;
		622
		623	default:
		624	croak ("encountered malformed CBOR::XS::Tagged object");
		625	}
		626
		627	return;
		628	}
		629	}
		630
		631	if (ecb_expect_false (SvREFCNT (sv) > 1)
		632	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		633	{
		634	if (ecb_expect_false (!enc->shareable))
		635	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		636
		637	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		638
		639	if (SvOK (*svp))
299	}	640	{
		641	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		642	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		643	return;
		644	}
		645	else
		646	{
		647	sv_setuv (*svp, enc->shareable_idx);
		648	++enc->shareable_idx;
		649	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		650	}
		651	}
		652
		653	if (ecb_expect_false (SvOBJECT (sv)))
		654	{
		655	HV *stash = SvSTASH (sv);
		656	GV *method;
		657
		658	if (enc->cbor.flags & F_FORBID_OBJECTS)
		659	croak ("encountered object '%s', but forbid_objects is enabled",
		660	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
300	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))	661	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
301	{	662	{
302	dSP;	663	dSP;
303		664
304	ENTER; SAVETMPS; PUSHMARK (SP);	665	ENTER; SAVETMPS;
		666	PUSHMARK (SP);
305	// we re-bless the reference to get overload and other niceties right	667	// we re-bless the reference to get overload and other niceties right
306	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	668	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
307		669
308	PUTBACK;	670	PUTBACK;
309	// G_SCALAR ensures that return value is 1	671	// G_SCALAR ensures that return value is 1
…		…
322	}	684	}
323	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)	685	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
324	{	686	{
325	dSP;	687	dSP;
326		688
327	ENTER; SAVETMPS; PUSHMARK (SP);	689	ENTER; SAVETMPS;
		690	PUSHMARK (SP);
328	EXTEND (SP, 2);	691	EXTEND (SP, 2);
329	// we re-bless the reference to get overload and other niceties right	692	// we re-bless the reference to get overload and other niceties right
330	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	693	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
331	PUSHs (sv_cbor);	694	PUSHs (sv_cbor);
332		695
…		…
336		699
337	// catch this surprisingly common error	700	// catch this surprisingly common error
338	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)	701	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
339	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));	702	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
340		703
341	encode_uint (enc, 0xc0, CBOR_TAG_PERL_OBJECT);	704	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
342	encode_uint (enc, 0x80, count + 1);	705	encode_uint (enc, MAJOR_ARRAY, count + 1);
343	encode_str (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));	706	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
344		707
345	while (count)	708	{
		709	int i;
		710
		711	for (i = 0; i < count; ++i)
346	encode_sv (enc, SP[1 - count--]);	712	encode_sv (enc, SP[i + 1 - count]);
		713
		714	SP -= count;
		715	}
347		716
348	PUTBACK;	717	PUTBACK;
349		718
350	FREETMPS; LEAVE;	719	FREETMPS; LEAVE;
351	}	720	}
…		…
355	}	724	}
356	else if (svt == SVt_PVHV)	725	else if (svt == SVt_PVHV)
357	encode_hv (enc, (HV *)sv);	726	encode_hv (enc, (HV *)sv);
358	else if (svt == SVt_PVAV)	727	else if (svt == SVt_PVAV)
359	encode_av (enc, (AV *)sv);	728	encode_av (enc, (AV *)sv);
360	else if (svt < SVt_PVAV)
361	{
362	STRLEN len = 0;
363	char *pv = svt ? SvPV (sv, len) : 0;
364
365	if (len == 1 && *pv == '1')
366	encode_ch (enc, 0xe0 | 21);
367	else if (len == 1 && *pv == '0')
368	encode_ch (enc, 0xe0 | 20);
369	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
370	encode_ch (enc, 0xe0 | 23);
371	else
372	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
373	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
374	}
375	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
376	encode_ch (enc, 0xe0 | 23);
377	else	729	else
378	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	730	{
379	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	731	encode_tag (enc, CBOR_TAG_INDIRECTION);
		732	encode_sv (enc, sv);
		733	}
380	}	734	}
381		735
382	static void	736	static void
383	encode_nv (enc_t *enc, SV *sv)	737	encode_nv (enc_t *enc, SV *sv)
384	{	738	{
385	double nv = SvNVX (sv);	739	double nv = SvNVX (sv);
386		740
387	need (enc, 9);	741	need (enc, 9);
388		742
389	if (ecb_expect_false (nv == (U32)nv))	743	if (ecb_expect_false (nv == (NV)(U32)nv))
390	encode_uint (enc, 0x00, (U32)nv);	744	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
391	//TODO: maybe I32?	745	//TODO: maybe I32?
392	else if (ecb_expect_false (nv == (float)nv))	746	else if (ecb_expect_false (nv == (float)nv))
393	{	747	encode_float32 (enc, nv);
394	uint32_t fp = ecb_float_to_binary32 (nv);
395
396	*enc->cur++ = 0xe0 | 26;
397
398	if (!ecb_big_endian ())
399	fp = ecb_bswap32 (fp);
400
401	memcpy (enc->cur, &fp, 4);
402	enc->cur += 4;
403	}
404	else	748	else
405	{	749	encode_float64 (enc, nv);
406	uint64_t fp = ecb_double_to_binary64 (nv);
407
408	*enc->cur++ = 0xe0 | 27;
409
410	if (!ecb_big_endian ())
411	fp = ecb_bswap64 (fp);
412
413	memcpy (enc->cur, &fp, 8);
414	enc->cur += 8;
415	}
416	}	750	}
417		751
418	static void	752	static void
419	encode_sv (enc_t *enc, SV *sv)	753	encode_sv (enc_t *enc, SV *sv)
420	{	754	{
…		…
422		756
423	if (SvPOKp (sv))	757	if (SvPOKp (sv))
424	{	758	{
425	STRLEN len;	759	STRLEN len;
426	char *str = SvPV (sv, len);	760	char *str = SvPV (sv, len);
427	encode_str (enc, SvUTF8 (sv), str, len);	761	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
428	}	762	}
429	else if (SvNOKp (sv))	763	else if (SvNOKp (sv))
430	encode_nv (enc, sv);	764	encode_nv (enc, sv);
431	else if (SvIOKp (sv))	765	else if (SvIOKp (sv))
432	{	766	encode_int (enc, sv);
433	if (SvIsUV (sv))
434	encode_uint (enc, 0x00, SvUVX (sv));
435	else if (SvIVX (sv) >= 0)
436	encode_uint (enc, 0x00, SvIVX (sv));
437	else
438	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
439	}
440	else if (SvROK (sv))	767	else if (SvROK (sv))
441	encode_rv (enc, SvRV (sv));	768	encode_rv (enc, SvRV (sv));
442	else if (!SvOK (sv))	769	else if (!SvOK (sv))
443	encode_ch (enc, 0xe0 | 22);	770	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
444	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	771	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
445	encode_ch (enc, 0xe0 | 23);	772	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
446	else	773	else
447	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	774	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
448	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	775	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
449	}	776	}
450		777
451	static SV *	778	static SV *
452	encode_cbor (SV *scalar, CBOR *cbor)	779	encode_cbor (SV *scalar, CBOR *cbor)
453	{	780	{
454	enc_t enc;	781	enc_t enc = { 0 };
455		782
456	enc.cbor = *cbor;	783	enc.cbor = *cbor;
457	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	784	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
458	enc.cur = SvPVX (enc.sv);	785	enc.cur = SvPVX (enc.sv);
459	enc.end = SvEND (enc.sv);	786	enc.end = SvEND (enc.sv);
460	enc.depth = 0;
461		787
462	SvPOK_only (enc.sv);	788	SvPOK_only (enc.sv);
		789
		790	if (cbor->flags & F_PACK_STRINGS)
		791	{
		792	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		793	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		794	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		795	}
		796
463	encode_sv (&enc, scalar);	797	encode_sv (&enc, scalar);
464		798
465	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	799	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
466	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	800	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
467		801
…		…
481	U8 *end; // end of input string	815	U8 *end; // end of input string
482	const char *err; // parse error, if != 0	816	const char *err; // parse error, if != 0
483	CBOR cbor;	817	CBOR cbor;
484	U32 depth; // recursion depth	818	U32 depth; // recursion depth
485	U32 maxdepth; // recursion depth limit	819	U32 maxdepth; // recursion depth limit
		820	AV *shareable;
		821	AV *stringref;
		822	SV *decode_tagged;
		823	SV *err_sv; // optional sv for error, needs to be freed
486	} dec_t;	824	} dec_t;
487		825
488	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	826	// set dec->err to ERRSV
		827	ecb_cold static void
		828	err_errsv (dec_t *dec)
		829	{
		830	if (!dec->err)
		831	{
		832	dec->err_sv = newSVsv (ERRSV);
489		833
490	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	834	// chop off the trailing \n
		835	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		836	*SvEND (dec->err_sv) = 0;
491		837
		838	dec->err = SvPVutf8_nolen (dec->err_sv);
		839	}
		840	}
		841
		842	// the following functions are used to reduce code size and help the compiler to optimise
		843	ecb_cold static void
		844	err_set (dec_t *dec, const char *reason)
		845	{
		846	if (!dec->err)
		847	dec->err = reason;
		848	}
		849
		850	ecb_cold static void
		851	err_unexpected_end (dec_t *dec)
		852	{
		853	err_set (dec, "unexpected end of CBOR data");
		854	}
		855
		856	#define ERR_DO(do) SB do; goto fail; SE
		857	#define ERR(reason) ERR_DO (err_set (dec, reason))
		858	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		859
		860	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		861
492	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	862	#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED)
493	#define DEC_DEC_DEPTH --dec->depth	863	#define DEC_DEC_DEPTH --dec->depth
494		864
495	static UV	865	static UV
496	decode_uint (dec_t *dec)	866	decode_uint (dec_t *dec)
497	{	867	{
498	switch (*dec->cur & 31)	868	U8 m = *dec->cur & MINOR_MASK;
499	{	869	++dec->cur;
500	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
501	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
502	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
503	return *dec->cur++ & 31;
504		870
505	case 24:	871	if (ecb_expect_true (m < LENGTH_EXT1))
		872	return m;
		873	else if (ecb_expect_true (m == LENGTH_EXT1))
		874	{
506	WANT (2);	875	WANT (1);
507	dec->cur += 2;	876	dec->cur += 1;
508	return dec->cur[-1];	877	return dec->cur[-1];
509		878	}
510	case 25:	879	else if (ecb_expect_true (m == LENGTH_EXT2))
		880	{
511	WANT (3);	881	WANT (2);
512	dec->cur += 3;	882	dec->cur += 2;
513	return (((UV)dec->cur[-2]) << 8)	883	return (((UV)dec->cur[-2]) << 8)
514	| ((UV)dec->cur[-1]);	884	| ((UV)dec->cur[-1]);
515		885	}
516	case 26:	886	else if (ecb_expect_true (m == LENGTH_EXT4))
		887	{
517	WANT (5);	888	WANT (4);
518	dec->cur += 5;	889	dec->cur += 4;
519	return (((UV)dec->cur[-4]) << 24)	890	return (((UV)dec->cur[-4]) << 24)
520	| (((UV)dec->cur[-3]) << 16)	891	| (((UV)dec->cur[-3]) << 16)
521	| (((UV)dec->cur[-2]) << 8)	892	| (((UV)dec->cur[-2]) << 8)
522	| ((UV)dec->cur[-1]);	893	| ((UV)dec->cur[-1]);
523		894	}
524	case 27:	895	else if (ecb_expect_true (m == LENGTH_EXT8))
		896	{
525	WANT (9);	897	WANT (8);
526	dec->cur += 9;	898	dec->cur += 8;
		899
		900	return
		901	#if UVSIZE < 8
		902	0
		903	#else
527	return (((UV)dec->cur[-8]) << 56)	904	(((UV)dec->cur[-8]) << 56)
528	| (((UV)dec->cur[-7]) << 48)	905	| (((UV)dec->cur[-7]) << 48)
529	| (((UV)dec->cur[-6]) << 40)	906	| (((UV)dec->cur[-6]) << 40)
530	| (((UV)dec->cur[-5]) << 32)	907	| (((UV)dec->cur[-5]) << 32)
		908	#endif
531	| (((UV)dec->cur[-4]) << 24)	909	| (((UV)dec->cur[-4]) << 24)
532	| (((UV)dec->cur[-3]) << 16)	910	| (((UV)dec->cur[-3]) << 16)
533	| (((UV)dec->cur[-2]) << 8)	911	| (((UV)dec->cur[-2]) << 8)
534	| ((UV)dec->cur[-1]);	912	| ((UV)dec->cur[-1]);
535		913	}
536	default:	914	else
537	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	915	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
538	}
539		916
540	fail:	917	fail:
541	return 0;	918	return 0;
542	}	919	}
543		920
…		…
548	{	925	{
549	AV *av = newAV ();	926	AV *av = newAV ();
550		927
551	DEC_INC_DEPTH;	928	DEC_INC_DEPTH;
552		929
553	if ((*dec->cur & 31) == 31)	930	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
554	{	931	{
555	++dec->cur;	932	++dec->cur;
556		933
557	for (;;)	934	for (;;)
558	{	935	{
559	WANT (1);	936	WANT (1);
560		937
561	if (*dec->cur == (0xe0 | 31))	938	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
562	{	939	{
563	++dec->cur;	940	++dec->cur;
564	break;	941	break;
565	}	942	}
566		943
567	av_push (av, decode_sv (dec));	944	av_push (av, decode_sv (dec));
568	}	945	}
569	}	946	}
570	else	947	else
571	{	948	{
572	int i, len = decode_uint (dec);	949	UV i, len = decode_uint (dec);
573		950
		951	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
574	av_fill (av, len - 1);	952	av_fill (av, len - 1);
575		953
576	for (i = 0; i < len; ++i)	954	for (i = 0; i < len; ++i)
577	AvARRAY (av)[i] = decode_sv (dec);	955	AvARRAY (av)[i] = decode_sv (dec);
578	}	956	}
579		957
580	DEC_DEC_DEPTH;	958	DEC_DEC_DEPTH;
581	return newRV_noinc ((SV *)av);	959	return newRV_noinc ((SV *)av);
582		960
583	fail:	961	fail:
584	SvREFCNT_dec (av);	962	SvREFCNT_dec_NN (av);
585	DEC_DEC_DEPTH;	963	DEC_DEC_DEPTH;
586	return &PL_sv_undef;	964	return &PL_sv_undef;
587	}	965	}
588		966
		967	static void
		968	decode_he (dec_t *dec, HV *hv)
		969	{
		970	// for speed reasons, we specialcase single-string
		971	// byte or utf-8 strings as keys, but only when !stringref
		972
		973	if (ecb_expect_true (!dec->stringref))
		974	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		975	{
		976	STRLEN len = decode_uint (dec);
		977	char *key = (char *)dec->cur;
		978
		979	WANT (len);
		980	dec->cur += len;
		981
		982	hv_store (hv, key, len, decode_sv (dec), 0);
		983
		984	return;
		985	}
		986	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		987	{
		988	STRLEN len = decode_uint (dec);
		989	char *key = (char *)dec->cur;
		990
		991	WANT (len);
		992	dec->cur += len;
		993
		994	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		995	if (!cbor_is_utf8_string ((U8 *)key, len))
		996	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		997
		998	hv_store (hv, key, -len, decode_sv (dec), 0);
		999
		1000	return;
		1001	}
		1002
		1003	SV *k = decode_sv (dec);
		1004	SV *v = decode_sv (dec);
		1005
		1006	// we leak memory if uncaught exceptions are thrown by random magical
		1007	// methods, and this is hopefully the only place where it can happen,
		1008	// so if there is a chance of an exception, take the very slow path.
		1009	// since catching exceptions is "undocumented/internal/forbidden" by
		1010	// the new p5p powers, we need to call out to a perl function :/
		1011	if (ecb_expect_false (SvAMAGIC (k)))
		1012	{
		1013	dSP;
		1014
		1015	ENTER; SAVETMPS;
		1016	PUSHMARK (SP);
		1017	EXTEND (SP, 3);
		1018	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		1019	PUSHs (sv_2mortal (k));
		1020	PUSHs (sv_2mortal (v));
		1021
		1022	PUTBACK;
		1023	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		1024	SPAGAIN;
		1025
		1026	FREETMPS; LEAVE;
		1027
		1028	if (SvTRUE (ERRSV))
		1029	ERR_ERRSV;
		1030
		1031	return;
		1032	}
		1033
		1034	hv_store_ent (hv, k, v, 0);
		1035	SvREFCNT_dec_NN (k);
		1036
		1037	fail:
		1038	;
		1039	}
		1040
589	static SV *	1041	static SV *
590	decode_hv (dec_t *dec)	1042	decode_hv (dec_t *dec)
591	{	1043	{
592	HV *hv = newHV ();	1044	HV *hv = newHV ();
593		1045
594	DEC_INC_DEPTH;	1046	DEC_INC_DEPTH;
595		1047
596	if ((*dec->cur & 31) == 31)	1048	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
597	{	1049	{
598	++dec->cur;	1050	++dec->cur;
599		1051
600	for (;;)	1052	for (;;)
601	{	1053	{
602	WANT (1);	1054	WANT (1);
603		1055
604	if (*dec->cur == (0xe0 | 31))	1056	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
605	{	1057	{
606	++dec->cur;	1058	++dec->cur;
607	break;	1059	break;
608	}	1060	}
609		1061
610	SV *k = decode_sv (dec);	1062	decode_he (dec, hv);
611	SV *v = decode_sv (dec);
612
613	hv_store_ent (hv, k, v, 0);
614	SvREFCNT_dec (k);
615	}	1063	}
616	}	1064	}
617	else	1065	else
618	{	1066	{
619	int len = decode_uint (dec);	1067	UV pairs = decode_uint (dec);
620		1068
		1069	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1070
621	while (len--)	1071	while (pairs--)
622	{	1072	decode_he (dec, hv);
623	SV *k = decode_sv (dec);
624	SV *v = decode_sv (dec);
625
626	hv_store_ent (hv, k, v, 0);
627	SvREFCNT_dec (k);
628	}
629	}	1073	}
630		1074
631	DEC_DEC_DEPTH;	1075	DEC_DEC_DEPTH;
632	return newRV_noinc ((SV *)hv);	1076	return newRV_noinc ((SV *)hv);
633		1077
634	fail:	1078	fail:
635	SvREFCNT_dec (hv);	1079	SvREFCNT_dec_NN (hv);
636	DEC_DEC_DEPTH;	1080	DEC_DEC_DEPTH;
637	return &PL_sv_undef;	1081	return &PL_sv_undef;
638	}	1082	}
639		1083
640	static SV *	1084	static SV *
641	decode_str (dec_t *dec, int utf8)	1085	decode_str (dec_t *dec, int utf8)
642	{	1086	{
643	SV *sv = 0;	1087	SV *sv = 0;
644		1088
645	if ((*dec->cur & 31) == 31)	1089	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
646	{	1090	{
		1091	// indefinite length strings
647	++dec->cur;	1092	++dec->cur;
648		1093
		1094	U8 major = *dec->cur & MAJOR_MISC;
		1095
649	sv = newSVpvn ("", 0);	1096	sv = newSVpvn ("", 0);
650		1097
651	// not very fast, and certainly not robust against illegal input
652	for (;;)	1098	for (;;)
653	{	1099	{
654	WANT (1);	1100	WANT (1);
655		1101
656	if (*dec->cur == (0xe0 | 31))	1102	if ((*dec->cur - major) > LENGTH_EXT8)
		1103	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
657	{	1104	{
658	++dec->cur;	1105	++dec->cur;
659	break;	1106	break;
660	}	1107	}
		1108	else
		1109	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
661		1110
662	sv_catsv (sv, decode_sv (dec));	1111	STRLEN len = decode_uint (dec);
		1112
		1113	WANT (len);
		1114	sv_catpvn (sv, dec->cur, len);
		1115	dec->cur += len;
663	}	1116	}
664	}	1117	}
665	else	1118	else
666	{	1119	{
667	STRLEN len = decode_uint (dec);	1120	STRLEN len = decode_uint (dec);
668		1121
669	WANT (len);	1122	WANT (len);
670	sv = newSVpvn (dec->cur, len);	1123	sv = newSVpvn (dec->cur, len);
671	dec->cur += len;	1124	dec->cur += len;
		1125
		1126	if (ecb_expect_false (dec->stringref)
		1127	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		1128	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
672	}	1129	}
673		1130
674	if (utf8)	1131	if (utf8)
		1132	{
		1133	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		1134	if (!cbor_is_utf8_string (SvPVX (sv), SvCUR (sv)))
		1135	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		1136
675	SvUTF8_on (sv);	1137	SvUTF8_on (sv);
		1138	}
676		1139
677	return sv;	1140	return sv;
678		1141
679	fail:	1142	fail:
680	SvREFCNT_dec (sv);	1143	SvREFCNT_dec (sv);
…		…
682	}	1145	}
683		1146
684	static SV *	1147	static SV *
685	decode_tagged (dec_t *dec)	1148	decode_tagged (dec_t *dec)
686	{	1149	{
		1150	SV *sv = 0;
687	UV tag = decode_uint (dec);	1151	UV tag = decode_uint (dec);
		1152
		1153	WANT (1);
		1154
		1155	switch (tag)
		1156	{
		1157	case CBOR_TAG_MAGIC:
688	SV *sv = decode_sv (dec);	1158	sv = decode_sv (dec);
		1159	break;
689		1160
690	if (tag == CBOR_TAG_MAGIC)	1161	case CBOR_TAG_INDIRECTION:
691	return sv;	1162	sv = newRV_noinc (decode_sv (dec));
692	else if (tag == CBOR_TAG_PERL_OBJECT)	1163	break;
693	{	1164
		1165	case CBOR_TAG_STRINGREF_NAMESPACE:
		1166	{
		1167	// do not use SAVETMPS/FREETMPS, as these will
		1168	// erase mortalised caches, e.g. "shareable"
		1169	ENTER;
		1170
		1171	SAVESPTR (dec->stringref);
		1172	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1173
		1174	sv = decode_sv (dec);
		1175
		1176	LEAVE;
		1177	}
		1178	break;
		1179
		1180	case CBOR_TAG_STRINGREF:
		1181	{
		1182	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1183	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1184
		1185	UV idx = decode_uint (dec);
		1186
		1187	if (!dec->stringref || idx >= (UV)(1 + AvFILLp (dec->stringref)))
		1188	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1189
		1190	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1191	}
		1192	break;
		1193
		1194	case CBOR_TAG_VALUE_SHAREABLE:
		1195	{
		1196	if (ecb_expect_false (!dec->shareable))
		1197	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1198
		1199	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1200	{
		1201	// if cycles are allowed, then we store an AV as value
		1202	// while it is being decoded, and gather unresolved
		1203	// references in it, to be re4solved after decoding.
		1204	int idx, i;
		1205	AV *av = newAV ();
		1206	av_push (dec->shareable, (SV *)av);
		1207	idx = AvFILLp (dec->shareable);
		1208
		1209	sv = decode_sv (dec);
		1210
		1211	// the AV now contains \undef for all unresolved references,
		1212	// so we fix them up here.
		1213	for (i = 0; i <= AvFILLp (av); ++i)
		1214	SvRV_set (AvARRAY (av)[i], SvREFCNT_inc_NN (SvRV (sv)));
		1215
		1216	// now replace the AV by a reference to the completed value
		1217	SvREFCNT_dec_NN ((SV *)av);
		1218	AvARRAY (dec->shareable)[idx] = SvREFCNT_inc_NN (sv);
		1219	}
		1220	else
		1221	{
		1222	av_push (dec->shareable, &PL_sv_undef);
		1223	int idx = AvFILLp (dec->shareable);
		1224	sv = decode_sv (dec);
		1225	AvARRAY (dec->shareable)[idx] = SvREFCNT_inc_NN (sv);
		1226	}
		1227	}
		1228	break;
		1229
		1230	case CBOR_TAG_VALUE_SHAREDREF:
		1231	{
		1232	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1233	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1234
		1235	UV idx = decode_uint (dec);
		1236
		1237	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
		1238	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1239
		1240	sv = AvARRAY (dec->shareable)[idx];
		1241
		1242	// reference to cycle, we create a new \undef and use that, and also
		1243	// registerr it in the AV for later fixing
		1244	if (SvTYPE (sv) == SVt_PVAV)
		1245	{
		1246	AV *av = (AV *)sv;
		1247	sv = newRV_noinc (&PL_sv_undef);
		1248	av_push (av, SvREFCNT_inc_NN (sv));
		1249	}
		1250	else if (sv == &PL_sv_undef) // not yet decoded, but cycles not allowed
		1251	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1252	else // we decoded the object earlier, no cycle
		1253	sv = newSVsv (sv);
		1254	}
		1255	break;
		1256
		1257	case CBOR_TAG_PERL_OBJECT:
		1258	{
		1259	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1260	goto filter;
		1261
		1262	sv = decode_sv (dec);
		1263
694	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)	1264	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
695	ERR ("corrupted CBOR data (non-array perl object)");	1265	ERR ("corrupted CBOR data (non-array perl object)");
696		1266
697	AV *av = (AV *)SvRV (sv);	1267	AV *av = (AV *)SvRV (sv);
698	int len = av_len (av) + 1;	1268	int len = av_len (av) + 1;
699	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);	1269	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
700		1270
701	if (!stash)	1271	if (!stash)
702	ERR ("cannot decode perl-object (package does not exist)");	1272	ERR ("cannot decode perl-object (package does not exist)");
703		1273
704	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);	1274	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
705		1275
706	if (!method)	1276	if (!method)
707	ERR ("cannot decode perl-object (package does not have a THAW method)");	1277	ERR ("cannot decode perl-object (package does not have a THAW method)");
708		1278
709	dSP;	1279	dSP;
710		1280
711	ENTER; SAVETMPS; PUSHMARK (SP);	1281	ENTER; SAVETMPS;
		1282	PUSHMARK (SP);
712	EXTEND (SP, len + 1);	1283	EXTEND (SP, len + 1);
713	// we re-bless the reference to get overload and other niceties right	1284	// we re-bless the reference to get overload and other niceties right
714	PUSHs (*av_fetch (av, 0, 1));	1285	PUSHs (*av_fetch (av, 0, 1));
715	PUSHs (sv_cbor);	1286	PUSHs (sv_cbor);
716		1287
717	int i;	1288	int i;
718		1289
719	for (i = 1; i < len; ++i)	1290	for (i = 1; i < len; ++i)
720	PUSHs (*av_fetch (av, i, 1));	1291	PUSHs (*av_fetch (av, i, 1));
721		1292
722	PUTBACK;	1293	PUTBACK;
723	call_sv ((SV *)GvCV (method), G_SCALAR);	1294	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
724	SPAGAIN;	1295	SPAGAIN;
725		1296
		1297	if (SvTRUE (ERRSV))
		1298	{
		1299	FREETMPS; LEAVE;
		1300	ERR_ERRSV;
		1301	}
		1302
726	SvREFCNT_dec (sv);	1303	SvREFCNT_dec_NN (sv);
727	sv = SvREFCNT_inc (POPs);	1304	sv = SvREFCNT_inc (POPs);
728		1305
729	PUTBACK;	1306	PUTBACK;
730		1307
731	FREETMPS; LEAVE;	1308	FREETMPS; LEAVE;
		1309	}
		1310	break;
732		1311
733	return sv;	1312	default:
734	}	1313	filter:
735	else	1314	{
736	{	1315	SV *tag_sv = newSVuv (tag);
		1316
		1317	sv = decode_sv (dec);
		1318
		1319	dSP;
		1320	ENTER; SAVETMPS;
		1321	PUSHMARK (SP);
		1322	EXTEND (SP, 2);
		1323	PUSHs (tag_sv);
		1324	PUSHs (sv);
		1325
		1326	PUTBACK;
		1327	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1328	SPAGAIN;
		1329
		1330	if (SvTRUE (ERRSV))
		1331	{
		1332	SvREFCNT_dec_NN (tag_sv);
		1333	FREETMPS; LEAVE;
		1334	ERR_ERRSV;
		1335	}
		1336
		1337	if (count)
		1338	{
		1339	SvREFCNT_dec_NN (tag_sv);
		1340	SvREFCNT_dec_NN (sv);
		1341	sv = SvREFCNT_inc_NN (TOPs);
		1342	SP -= count;
		1343	}
		1344	else
		1345	{
737	AV *av = newAV ();	1346	AV *av = newAV ();
738	av_push (av, newSVuv (tag));	1347	av_push (av, tag_sv);
739	av_push (av, sv);	1348	av_push (av, sv);
740		1349
741	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	1350	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
742	? cbor_tagged_stash	1351	? cbor_tagged_stash
743	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1352	: gv_stashpv ("CBOR::XS::Tagged" , 1);
744
745	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);	1353	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1354	}
		1355
		1356	PUTBACK;
		1357
		1358	FREETMPS; LEAVE;
		1359	}
		1360	break;
746	}	1361	}
		1362
		1363	return sv;
747		1364
748	fail:	1365	fail:
749	SvREFCNT_dec (sv);	1366	SvREFCNT_dec (sv);
750	return &PL_sv_undef;	1367	return &PL_sv_undef;
751	}	1368	}
…		…
753	static SV *	1370	static SV *
754	decode_sv (dec_t *dec)	1371	decode_sv (dec_t *dec)
755	{	1372	{
756	WANT (1);	1373	WANT (1);
757		1374
758	switch (*dec->cur >> 5)	1375	switch (*dec->cur >> MAJOR_SHIFT)
759	{	1376	{
760	case 0: // unsigned int	1377	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
761	return newSVuv (decode_uint (dec));	1378	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
762	case 1: // negative int	1379	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
763	return newSViv (-1 - (IV)decode_uint (dec));	1380	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
764	case 2: // octet string	1381	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
765	return decode_str (dec, 0);	1382	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
766	case 3: // utf-8 string	1383	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
767	return decode_str (dec, 1);	1384
768	case 4: // array	1385	case MAJOR_MISC >> MAJOR_SHIFT:
769	return decode_av (dec);
770	case 5: // map
771	return decode_hv (dec);
772	case 6: // tag
773	return decode_tagged (dec);
774	case 7: // misc
775	switch (*dec->cur++ & 31)	1386	switch (*dec->cur++ & MINOR_MASK)
776	{	1387	{
777	case 20:	1388	case SIMPLE_FALSE:
778	#if CBOR_SLOW	1389	#if CBOR_SLOW
779	types_false = get_bool ("Types::Serialiser::false");	1390	types_false = get_bool ("Types::Serialiser::false");
780	#endif	1391	#endif
781	return newSVsv (types_false);	1392	return newSVsv (types_false);
782	case 21:	1393	case SIMPLE_TRUE:
783	#if CBOR_SLOW	1394	#if CBOR_SLOW
784	types_true = get_bool ("Types::Serialiser::true");	1395	types_true = get_bool ("Types::Serialiser::true");
785	#endif	1396	#endif
786	return newSVsv (types_true);	1397	return newSVsv (types_true);
787	case 22:	1398	case SIMPLE_NULL:
788	return newSVsv (&PL_sv_undef);	1399	return newSVsv (&PL_sv_undef);
789	case 23:	1400	case SIMPLE_UNDEF:
790	#if CBOR_SLOW	1401	#if CBOR_SLOW
791	types_error = get_bool ("Types::Serialiser::error");	1402	types_error = get_bool ("Types::Serialiser::error");
792	#endif	1403	#endif
793	return newSVsv (types_error);	1404	return newSVsv (types_error);
794		1405
795	case 25:	1406	case MISC_FLOAT16:
796	{	1407	{
797	WANT (2);	1408	WANT (2);
798		1409
799	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1410	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
800	dec->cur += 2;	1411	dec->cur += 2;
801		1412
802	return newSVnv (ecb_binary16_to_float (fp));	1413	return newSVnv (ecb_binary16_to_float (fp));
803	}	1414	}
804		1415
805	case 26:	1416	case MISC_FLOAT32:
806	{	1417	{
807	uint32_t fp;	1418	uint32_t fp;
808	WANT (4);	1419	WANT (4);
809	memcpy (&fp, dec->cur, 4);	1420	memcpy (&fp, dec->cur, 4);
810	dec->cur += 4;	1421	dec->cur += 4;
…		…
813	fp = ecb_bswap32 (fp);	1424	fp = ecb_bswap32 (fp);
814		1425
815	return newSVnv (ecb_binary32_to_float (fp));	1426	return newSVnv (ecb_binary32_to_float (fp));
816	}	1427	}
817		1428
818	case 27:	1429	case MISC_FLOAT64:
819	{	1430	{
820	uint64_t fp;	1431	uint64_t fp;
821	WANT (8);	1432	WANT (8);
822	memcpy (&fp, dec->cur, 8);	1433	memcpy (&fp, dec->cur, 8);
823	dec->cur += 8;	1434	dec->cur += 8;
…		…
826	fp = ecb_bswap64 (fp);	1437	fp = ecb_bswap64 (fp);
827		1438
828	return newSVnv (ecb_binary64_to_double (fp));	1439	return newSVnv (ecb_binary64_to_double (fp));
829	}	1440	}
830		1441
831	// 0..19 unassigned	1442	// 0..19 unassigned simple
832	// 24 reserved + unassigned (reserved values are not encodable)	1443	// 24 reserved + unassigned simple (reserved values are not encodable)
		1444	// 28-30 unassigned misc
		1445	// 31 break code
833	default:	1446	default:
834	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1447	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
835	}	1448	}
836		1449
837	break;	1450	break;
838	}	1451	}
839		1452
…		…
842	}	1455	}
843		1456
844	static SV *	1457	static SV *
845	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1458	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
846	{	1459	{
847	dec_t dec;	1460	dec_t dec = { 0 };
848	SV *sv;	1461	SV *sv;
		1462	STRLEN len;
		1463	char *data = SvPVbyte (string, len);
849		1464
850	/* work around bugs in 5.10 where manipulating magic values
851	* makes perl ignore the magic in subsequent accesses.
852	* also make a copy of non-PV values, to get them into a clean
853	* state (SvPV should do that, but it's buggy, see below).
854	*/
855	/*SvGETMAGIC (string);*/
856	if (SvMAGICAL (string) || !SvPOK (string))
857	string = sv_2mortal (newSVsv (string));
858
859	SvUPGRADE (string, SVt_PV);
860
861	/* work around a bug in perl 5.10, which causes SvCUR to fail an
862	* assertion with -DDEBUGGING, although SvCUR is documented to
863	* return the xpv_cur field which certainly exists after upgrading.
864	* according to nicholas clark, calling SvPOK fixes this.
865	* But it doesn't fix it, so try another workaround, call SvPV_nolen
866	* and hope for the best.
867	* Damnit, SvPV_nolen still trips over yet another assertion. This
868	* assertion business is seriously broken, try yet another workaround
869	* for the broken -DDEBUGGING.
870	*/
871	{
872	#ifdef DEBUGGING
873	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
874	#else
875	STRLEN offset = SvCUR (string);
876	#endif
877
878	if (offset > cbor->max_size && cbor->max_size)	1465	if (len > cbor->max_size && cbor->max_size)
879	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1466	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
880	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1467	(unsigned long)len, (unsigned long)cbor->max_size);
881	}
882
883	sv_utf8_downgrade (string, 0);
884		1468
885	dec.cbor = *cbor;	1469	dec.cbor = *cbor;
886	dec.cur = (U8 *)SvPVX (string);	1470	dec.cur = (U8 *)data;
887	dec.end = (U8 *)SvEND (string);	1471	dec.end = (U8 *)data + len;
888	dec.err = 0;
889	dec.depth = 0;
890		1472
891	sv = decode_sv (&dec);	1473	sv = decode_sv (&dec);
892		1474
893	if (offset_return)	1475	if (offset_return)
894	*offset_return = dec.cur;	1476	*offset_return = dec.cur;
…		…
897	if (dec.cur != dec.end && !dec.err)	1479	if (dec.cur != dec.end && !dec.err)
898	dec.err = "garbage after CBOR object";	1480	dec.err = "garbage after CBOR object";
899		1481
900	if (dec.err)	1482	if (dec.err)
901	{	1483	{
		1484	if (dec.shareable)
		1485	{
		1486	// need to break cyclic links, which would all be in shareable
		1487	int i;
		1488	SV **svp;
		1489
		1490	for (i = av_len (dec.shareable) + 1; i--; )
		1491	if ((svp = av_fetch (dec.shareable, i, 0)))
		1492	sv_setsv (*svp, &PL_sv_undef);
		1493	}
		1494
902	SvREFCNT_dec (sv);	1495	SvREFCNT_dec_NN (sv);
		1496
		1497	if (dec.err_sv)
		1498	sv_2mortal (dec.err_sv);
		1499
903	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1500	croak ("%s, at offset %ld (octet 0x%02x)", dec.err, (long)(dec.cur - (U8 *)data), (int)(uint8_t)*dec.cur);
904	}	1501	}
905		1502
906	sv = sv_2mortal (sv);	1503	sv = sv_2mortal (sv);
907		1504
908	return sv;	1505	return sv;
909	}	1506	}
910		1507
		1508	/////////////////////////////////////////////////////////////////////////////
		1509	// incremental parser
		1510
		1511	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1512
		1513	// returns 0 for notyet, 1 for success or error
		1514	static int
		1515	incr_parse (CBOR *self, SV *cborstr)
		1516	{
		1517	STRLEN cur;
		1518	SvPV (cborstr, cur);
		1519
		1520	while (ecb_expect_true (self->incr_need <= cur))
		1521	{
		1522	// table of integer count bytes
		1523	static I8 incr_len[MINOR_MASK + 1] = {
		1524	0, 0, 0, 0, 0, 0, 0, 0,
		1525	0, 0, 0, 0, 0, 0, 0, 0,
		1526	0, 0, 0, 0, 0, 0, 0, 0,
		1527	1, 2, 4, 8,-1,-1,-1,-2
		1528	};
		1529
		1530	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1531	U8 m = *p & MINOR_MASK;
		1532	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1533	I8 ilen = incr_len[m];
		1534
		1535	self->incr_need = self->incr_pos + 1;
		1536
		1537	if (ecb_expect_false (ilen < 0))
		1538	{
		1539	if (m != MINOR_INDEF)
		1540	return 1; // error
		1541
		1542	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1543	{
		1544	if (count >= 0)
		1545	return 1; // error
		1546
		1547	count = 1;
		1548	}
		1549	else
		1550	{
		1551	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1552	count = -1;
		1553	}
		1554	}
		1555	else
		1556	{
		1557	self->incr_need += ilen;
		1558	if (ecb_expect_false (self->incr_need > cur))
		1559	return 0;
		1560
		1561	int major = *p >> MAJOR_SHIFT;
		1562
		1563	switch (major)
		1564	{
		1565	case MAJOR_TAG >> MAJOR_SHIFT:
		1566	++count; // tags merely prefix another value
		1567	break;
		1568
		1569	case MAJOR_BYTES >> MAJOR_SHIFT:
		1570	case MAJOR_TEXT >> MAJOR_SHIFT:
		1571	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1572	case MAJOR_MAP >> MAJOR_SHIFT:
		1573	{
		1574	UV len;
		1575
		1576	if (ecb_expect_false (ilen))
		1577	{
		1578	len = 0;
		1579
		1580	do {
		1581	len = (len << 8) | *++p;
		1582	} while (--ilen);
		1583	}
		1584	else
		1585	len = m;
		1586
		1587	switch (major)
		1588	{
		1589	case MAJOR_BYTES >> MAJOR_SHIFT:
		1590	case MAJOR_TEXT >> MAJOR_SHIFT:
		1591	self->incr_need += len;
		1592	if (ecb_expect_false (self->incr_need > cur))
		1593	return 0;
		1594
		1595	break;
		1596
		1597	case MAJOR_MAP >> MAJOR_SHIFT:
		1598	len <<= 1;
		1599	/* FALLTHROUGH */
		1600	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1601	if (len)
		1602	{
		1603	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1604	count = len + 1;
		1605	}
		1606	break;
		1607	}
		1608	}
		1609	}
		1610	}
		1611
		1612	self->incr_pos = self->incr_need;
		1613
		1614	if (count > 0)
		1615	{
		1616	while (!--count)
		1617	{
		1618	if (!AvFILLp (self->incr_count))
		1619	return 1; // done
		1620
		1621	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1622	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1623	}
		1624
		1625	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1626	}
		1627	}
		1628
		1629	return 0;
		1630	}
		1631
		1632
911	/////////////////////////////////////////////////////////////////////////////	1633	/////////////////////////////////////////////////////////////////////////////
912	// XS interface functions	1634	// XS interface functions
913		1635
914	MODULE = CBOR::XS PACKAGE = CBOR::XS	1636	MODULE = CBOR::XS PACKAGE = CBOR::XS
915		1637
…		…
923		1645
924	types_true = get_bool ("Types::Serialiser::true" );	1646	types_true = get_bool ("Types::Serialiser::true" );
925	types_false = get_bool ("Types::Serialiser::false");	1647	types_false = get_bool ("Types::Serialiser::false");
926	types_error = get_bool ("Types::Serialiser::error");	1648	types_error = get_bool ("Types::Serialiser::error");
927		1649
		1650	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1651
928	sv_cbor = newSVpv ("CBOR", 0);	1652	sv_cbor = newSVpv ("CBOR", 0);
929	SvREADONLY_on (sv_cbor);	1653	SvREADONLY_on (sv_cbor);
		1654
		1655	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
930	}	1656	}
931		1657
932	PROTOTYPES: DISABLE	1658	PROTOTYPES: DISABLE
933		1659
934	void CLONE (...)	1660	void CLONE (...)
…		…
952		1678
953	void shrink (CBOR *self, int enable = 1)	1679	void shrink (CBOR *self, int enable = 1)
954	ALIAS:	1680	ALIAS:
955	shrink = F_SHRINK	1681	shrink = F_SHRINK
956	allow_unknown = F_ALLOW_UNKNOWN	1682	allow_unknown = F_ALLOW_UNKNOWN
		1683	allow_sharing = F_ALLOW_SHARING
		1684	allow_cycles = F_ALLOW_CYCLES
		1685	forbid_objects = F_FORBID_OBJECTS
		1686	pack_strings = F_PACK_STRINGS
		1687	text_keys = F_TEXT_KEYS
		1688	text_strings = F_TEXT_STRINGS
		1689	validate_utf8 = F_VALIDATE_UTF8
957	PPCODE:	1690	PPCODE:
958	{	1691	{
959	if (enable)	1692	if (enable)
960	self->flags |= ix;	1693	self->flags |= ix;
961	else	1694	else
…		…
966		1699
967	void get_shrink (CBOR *self)	1700	void get_shrink (CBOR *self)
968	ALIAS:	1701	ALIAS:
969	get_shrink = F_SHRINK	1702	get_shrink = F_SHRINK
970	get_allow_unknown = F_ALLOW_UNKNOWN	1703	get_allow_unknown = F_ALLOW_UNKNOWN
		1704	get_allow_sharing = F_ALLOW_SHARING
		1705	get_allow_cycles = F_ALLOW_CYCLES
		1706	get_forbid_objects = F_FORBID_OBJECTS
		1707	get_pack_strings = F_PACK_STRINGS
		1708	get_text_keys = F_TEXT_KEYS
		1709	get_text_strings = F_TEXT_STRINGS
		1710	get_validate_utf8 = F_VALIDATE_UTF8
971	PPCODE:	1711	PPCODE:
972	XPUSHs (boolSV (self->flags & ix));	1712	XPUSHs (boolSV (self->flags & ix));
973		1713
974	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1714	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
975	PPCODE:	1715	PPCODE:
…		…
988	XPUSHs (ST (0));	1728	XPUSHs (ST (0));
989		1729
990	int get_max_size (CBOR *self)	1730	int get_max_size (CBOR *self)
991	CODE:	1731	CODE:
992	RETVAL = self->max_size;	1732	RETVAL = self->max_size;
		1733	OUTPUT:
		1734	RETVAL
		1735
		1736	void filter (CBOR *self, SV *filter = 0)
		1737	PPCODE:
		1738	SvREFCNT_dec (self->filter);
		1739	self->filter = filter ? newSVsv (filter) : filter;
		1740	XPUSHs (ST (0));
		1741
		1742	SV *get_filter (CBOR *self)
		1743	CODE:
		1744	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
993	OUTPUT:	1745	OUTPUT:
994	RETVAL	1746	RETVAL
995		1747
996	void encode (CBOR *self, SV *scalar)	1748	void encode (CBOR *self, SV *scalar)
997	PPCODE:	1749	PPCODE:
…		…
1012	EXTEND (SP, 2);	1764	EXTEND (SP, 2);
1013	PUSHs (sv);	1765	PUSHs (sv);
1014	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1766	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1015	}	1767	}
1016		1768
		1769	void incr_parse (CBOR *self, SV *cborstr)
		1770	ALIAS:
		1771	incr_parse_multiple = 1
		1772	PPCODE:
		1773	{
		1774	if (SvUTF8 (cborstr))
		1775	sv_utf8_downgrade (cborstr, 0);
		1776
		1777	if (!self->incr_count)
		1778	{
		1779	self->incr_count = newAV ();
		1780	self->incr_pos = 0;
		1781	self->incr_need = 1;
		1782
		1783	av_push (self->incr_count, newSViv (1));
		1784	}
		1785
		1786	do
		1787	{
		1788	if (!incr_parse (self, cborstr))
		1789	{
		1790	if (self->incr_need > self->max_size && self->max_size)
		1791	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1792	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1793
		1794	break;
		1795	}
		1796
		1797	SV *sv;
		1798	char *offset;
		1799
		1800	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1801	XPUSHs (sv);
		1802
		1803	sv_chop (cborstr, offset);
		1804
		1805	av_clear (self->incr_count);
		1806	av_push (self->incr_count, newSViv (1));
		1807
		1808	self->incr_pos = 0;
		1809	self->incr_need = self->incr_pos + 1;
		1810	}
		1811	while (ix);
		1812	}
		1813
		1814	void incr_reset (CBOR *self)
		1815	CODE:
		1816	{
		1817	SvREFCNT_dec (self->incr_count);
		1818	self->incr_count = 0;
		1819	}
		1820
		1821	void DESTROY (CBOR *self)
		1822	PPCODE:
		1823	cbor_free (self);
		1824
1017	PROTOTYPES: ENABLE	1825	PROTOTYPES: ENABLE
1018		1826
1019	void encode_cbor (SV *scalar)	1827	void encode_cbor (SV *scalar)
		1828	ALIAS:
		1829	encode_cbor = 0
		1830	encode_cbor_sharing = F_ALLOW_SHARING
1020	PPCODE:	1831	PPCODE:
1021	{	1832	{
1022	CBOR cbor;	1833	CBOR cbor;
1023	cbor_init (&cbor);	1834	cbor_init (&cbor);
		1835	cbor.flags |= ix;
1024	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1836	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1025	XPUSHs (scalar);	1837	XPUSHs (scalar);
1026	}	1838	}
1027		1839
1028	void decode_cbor (SV *cborstr)	1840	void decode_cbor (SV *cborstr)
…		…
1032	cbor_init (&cbor);	1844	cbor_init (&cbor);
1033	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1845	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1034	XPUSHs (cborstr);	1846	XPUSHs (cborstr);
1035	}	1847	}
1036		1848
		1849	#ifdef __AFL_COMPILER
		1850
		1851	void
		1852	afl_init ()
		1853	CODE:
		1854	__AFL_INIT ();
		1855
		1856	int
		1857	afl_loop (unsigned int count = 10000)
		1858	CODE:
		1859	RETVAL = __AFL_LOOP (count);
		1860	OUTPUT:
		1861	RETVAL
		1862
		1863	#endif
		1864

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