[ViewVC] Diff of: cvs/CBOR-XS/XS.xs

Comparing CBOR-XS/XS.xs (file contents):
Revision 1.11 by root, Sun Oct 27 22:35:15 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"
		15
		16	// compatibility with perl <5.18
		17	#ifndef HvNAMELEN_get
		18	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		19	#endif
		20	#ifndef HvNAMELEN
		21	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		22	#endif
		23	#ifndef HvNAMEUTF8
		24	# define HvNAMEUTF8(hv) 0
		25	#endif
		26	#ifndef SvREFCNT_inc_NN
		27	# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
		28	#endif
		29	#ifndef SvREFCNT_dec_NN
		30	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		31	#endif
		32
		33	// perl's is_utf8_string interprets len=0 as "calculate len", but we want it to mean 0
		34	#define cbor_is_utf8_string(str,len) (!(len) \|\| is_utf8_string ((str), (len)))
		35
		36	// known major and minor types
		37	enum cbor_type
		38	{
		39	MAJOR_SHIFT = 5,
		40	MINOR_MASK = 0x1f,
		41
		42	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		43	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		44	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		45	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		46	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		47	MAJOR_MAP = 5 << MAJOR_SHIFT,
		48	MAJOR_TAG = 6 << MAJOR_SHIFT,
		49	MAJOR_MISC = 7 << MAJOR_SHIFT,
		50
		51	// INT/STRING/ARRAY/MAP subtypes
		52	LENGTH_EXT1 = 24,
		53	LENGTH_EXT2 = 25,
		54	LENGTH_EXT4 = 26,
		55	LENGTH_EXT8 = 27,
		56
		57	// SIMPLE types (effectively MISC subtypes)
		58	SIMPLE_FALSE = 20,
		59	SIMPLE_TRUE = 21,
		60	SIMPLE_NULL = 22,
		61	SIMPLE_UNDEF = 23,
		62
		63	// MISC subtype (unused)
		64	MISC_EXT1 = 24,
		65	MISC_FLOAT16 = 25,
		66	MISC_FLOAT32 = 26,
		67	MISC_FLOAT64 = 27,
		68
		69	// BYTES/TEXT/ARRAY/MAP
		70	MINOR_INDEF = 31,
		71	};
13		72
14	// known tags	73	// known tags
15	enum cbor_tag	74	enum cbor_tag
16	{	75	{
17	// inofficial extensions (pending iana registration)	76	// extensions
18	CBOR_TAG_PERL_OBJECT = 256,	77	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
19	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
20		84
21	// rfc7049	85	// rfc7049
22	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	86	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
23	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	87	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
24	CBOR_TAG_POS_BIGNUM = 2, // byte string	88	CBOR_TAG_POS_BIGNUM = 2, // byte string
25	CBOR_TAG_NEG_BIGNUM = 3, // byte string	89	CBOR_TAG_NEG_BIGNUM = 3, // byte string
26	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	90	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
27	CBOR_TAG_BIGFLOAT = 5, // array	91	CBOR_TAG_BIGFLOAT = 5, // array
28		92
29	CBOR_TAG_CONV_B64U = 21, // base64url, any	93	CBOR_TAG_CONV_B64U = 21, // base64url, any
30	CBOR_TAG_CONV_B64 = 22, // base64, any	94	CBOR_TAG_CONV_B64 = 22, // base64, any
31	CBOR_TAG_CONV_HEX = 23, // base16, any	95	CBOR_TAG_CONV_HEX = 23, // base16, any
32	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	96	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
33		97
34	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	98	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
35	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	99	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
36	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	100	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
37	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	101	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
38	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	102	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
39		103
40	CBOR_TAG_MAGIC = 55799 // self-describe cbor	104	CBOR_TAG_MAGIC = 55799, // self-describe cbor
41	};	105	};
42		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
43	#define F_SHRINK 0x00000200UL	121	#define F_SHRINK 0x00000001UL
44	#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
45		130
46	#define INIT_SIZE 32 // initial scalar size to be allocated	131	#define INIT_SIZE 32 // initial scalar size to be allocated
47		132
48	#define SB do {	133	#define SB do {
49	#define SE } while (0)	134	#define SE } while (0)
…		…
61	# define CBOR_SLOW 0	146	# define CBOR_SLOW 0
62	# define CBOR_STASH cbor_stash	147	# define CBOR_STASH cbor_stash
63	#endif	148	#endif
64		149
65	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::
66	static SV types_true, types_false, types_error, sv_cbor;	151	static SV types_true, types_false, types_error, sv_cbor, *default_filter;
67		152
68	typedef struct {	153	typedef struct {
69	U32 flags;	154	U32 flags;
70	U32 max_depth;	155	U32 max_depth;
71	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.
72	} CBOR;	163	} CBOR;
73		164
74	ecb_inline void	165	ecb_inline void
75	cbor_init (CBOR *cbor)	166	cbor_init (CBOR *cbor)
76	{	167	{
77	Zero (cbor, 1, CBOR);	168	Zero (cbor, 1, CBOR);
78	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);
79	}	177	}
80		178
81	/////////////////////////////////////////////////////////////////////////////	179	/////////////////////////////////////////////////////////////////////////////
82	// utility functions	180	// utility functions
83		181
…		…
105	SvPV_renew (sv, SvCUR (sv) + 1);	203	SvPV_renew (sv, SvCUR (sv) + 1);
106	#endif	204	#endif
107	}	205	}
108	}	206	}
109		207
110	/////////////////////////////////////////////////////////////////////////////	208	// minimum length of a string to be registered for stringref
111	// fp hell	209	ecb_inline STRLEN
112		210	minimum_string_length (UV idx)
113	//TODO	211	{
		212	return idx <= 23 ? 3
		213	: idx <= 0xffU ? 4
		214	: idx <= 0xffffU ? 5
		215	: idx <= 0xffffffffU ? 7
		216	: 11;
		217	}
114		218
115	/////////////////////////////////////////////////////////////////////////////	219	/////////////////////////////////////////////////////////////////////////////
116	// encoder	220	// encoder
117		221
118	// structure used for encoding CBOR	222	// structure used for encoding CBOR
…		…
121	char *cur; // SvPVX (sv) + current output position	225	char *cur; // SvPVX (sv) + current output position
122	char *end; // SvEND (sv)	226	char *end; // SvEND (sv)
123	SV *sv; // result scalar	227	SV *sv; // result scalar
124	CBOR cbor;	228	CBOR cbor;
125	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;
126	} enc_t;	234	} enc_t;
127		235
128	ecb_inline void	236	ecb_inline void
129	need (enc_t *enc, STRLEN len)	237	need (enc_t *enc, STRLEN len)
130	{	238	{
131	if (ecb_expect_false (enc->cur + len >= enc->end))	239	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
132	{	240	{
133	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	241	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
134	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	242	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
135	enc->cur = SvPVX (enc->sv) + cur;	243	enc->cur = SvPVX (enc->sv) + cur;
136	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	244	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
137	}	245	}
138	}	246	}
139		247
		248	static void encode_sv (enc_t enc, SV sv);
		249
140	ecb_inline void	250	ecb_inline void
141	encode_ch (enc_t *enc, char ch)	251	encode_ch (enc_t *enc, char ch)
142	{	252	{
143	need (enc, 1);	253	need (enc, 1);
144	*enc->cur++ = ch;	254	*enc->cur++ = ch;
145	}	255	}
146		256
		257	// used for tags, intregers, element counts and so on
147	static void	258	static void
148	encode_uint (enc_t *enc, int major, UV len)	259	encode_uint (enc_t *enc, int major, UV len)
149	{	260	{
150	need (enc, 9);	261	need (enc, 9);
151		262
152	if (len < 24)	263	if (ecb_expect_true (len < LENGTH_EXT1))
153	*enc->cur++ = major \| len;	264	*enc->cur++ = major \| len;
154	else if (len <= 0xff)	265	else if (ecb_expect_true (len <= 0xffU))
155	{	266	{
156	*enc->cur++ = major \| 24;	267	*enc->cur++ = major \| LENGTH_EXT1;
157	*enc->cur++ = len;	268	*enc->cur++ = len;
158	}	269	}
159	else if (len <= 0xffff)	270	else if (len <= 0xffffU)
160	{	271	{
161	*enc->cur++ = major \| 25;	272	*enc->cur++ = major \| LENGTH_EXT2;
162	*enc->cur++ = len >> 8;	273	*enc->cur++ = len >> 8;
163	*enc->cur++ = len;	274	*enc->cur++ = len;
164	}	275	}
165	else if (len <= 0xffffffff)	276	else if (len <= 0xffffffffU)
166	{	277	{
167	*enc->cur++ = major \| 26;	278	*enc->cur++ = major \| LENGTH_EXT4;
168	*enc->cur++ = len >> 24;	279	*enc->cur++ = len >> 24;
169	*enc->cur++ = len >> 16;	280	*enc->cur++ = len >> 16;
170	*enc->cur++ = len >> 8;	281	*enc->cur++ = len >> 8;
171	*enc->cur++ = len;	282	*enc->cur++ = len;
172	}	283	}
173	else	284	else
174	{	285	{
175	*enc->cur++ = major \| 27;	286	*enc->cur++ = major \| LENGTH_EXT8;
176	*enc->cur++ = len >> 56;	287	*enc->cur++ = len >> 56;
177	*enc->cur++ = len >> 48;	288	*enc->cur++ = len >> 48;
178	*enc->cur++ = len >> 40;	289	*enc->cur++ = len >> 40;
179	*enc->cur++ = len >> 32;	290	*enc->cur++ = len >> 32;
180	*enc->cur++ = len >> 24;	291	*enc->cur++ = len >> 24;
…		…
182	*enc->cur++ = len >> 8;	293	*enc->cur++ = len >> 8;
183	*enc->cur++ = len;	294	*enc->cur++ = len;
184	}	295	}
185	}	296	}
186		297
187	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
188	encode_str (enc_t enc, int utf8, char str, STRLEN len)	318	encode_str_utf8 (enc_t enc, int utf8, char str, STRLEN len)
189	{	319	{
190	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);
191	need (enc, len);	350	need (enc, len);
192	memcpy (enc->cur, str, len);	351	memcpy (enc->cur, str, len);
193	enc->cur += len;	352	enc->cur += len;
194	}	353	}
195		354
196	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	}
197		510
198	static void	511	static void
199	encode_av (enc_t enc, AV av)	512	encode_av (enc_t enc, AV av)
200	{	513	{
201	int i, len = av_len (av);	514	int i, len = av_len (av);
…		…
203	if (enc->depth >= enc->cbor.max_depth)	516	if (enc->depth >= enc->cbor.max_depth)
204	croak (ERR_NESTING_EXCEEDED);	517	croak (ERR_NESTING_EXCEEDED);
205		518
206	++enc->depth;	519	++enc->depth;
207		520
208	encode_uint (enc, 0x80, len + 1);	521	encode_uint (enc, MAJOR_ARRAY, len + 1);
209		522
		523	if (ecb_expect_false (SvMAGICAL (av)))
210	for (i = 0; i <= len; ++i)	524	for (i = 0; i <= len; ++i)
211	{	525	{
212	SV **svp = av_fetch (av, i, 0);	526	SV **svp = av_fetch (av, i, 0);
213	encode_sv (enc, svp ? *svp : &PL_sv_undef);	527	encode_sv (enc, svp ? *svp : &PL_sv_undef);
214	}	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	}
215		535
216	--enc->depth;	536	--enc->depth;
217	}	537	}
218		538
219	static void	539	static void
…		…
227	++enc->depth;	547	++enc->depth;
228		548
229	int pairs = hv_iterinit (hv);	549	int pairs = hv_iterinit (hv);
230	int mg = SvMAGICAL (hv);	550	int mg = SvMAGICAL (hv);
231		551
232	if (mg)	552	if (ecb_expect_false (mg))
233	encode_ch (enc, 0xa0 \| 31);	553	encode_ch (enc, MAJOR_MAP \| MINOR_INDEF);
234	else	554	else
235	encode_uint (enc, 0xa0, pairs);	555	encode_uint (enc, MAJOR_MAP, pairs);
236		556
237	while ((he = hv_iternext (hv)))	557	while ((he = hv_iternext (hv)))
238	{	558	{
239	if (HeKLEN (he) == HEf_SVKEY)	559	if (HeKLEN (he) == HEf_SVKEY)
240	encode_sv (enc, HeSVKEY (he));	560	encode_sv (enc, HeSVKEY (he));
241	else	561	else
242	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));
243		563
244	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));
245	}	565	}
246		566
247	if (mg)	567	if (ecb_expect_false (mg))
248	encode_ch (enc, 0xe0 \| 31);	568	encode_ch (enc, MAJOR_MISC \| MINOR_INDEF);
249		569
250	--enc->depth;	570	--enc->depth;
251	}	571	}
252		572
253	// encode objects, arrays and special \0=false and \1=true values.	573	// encode objects, arrays and special \0=false and \1=true values.
254	static void	574	static void
255	encode_rv (enc_t enc, SV sv)	575	encode_rv (enc_t enc, SV sv)
256	{	576	{
257	svtype svt;
258
259	SvGETMAGIC (sv);	577	SvGETMAGIC (sv);
		578
260	svt = SvTYPE (sv);	579	svtype svt = SvTYPE (sv);
261		580
262	if (ecb_expect_false (SvOBJECT (sv)))	581	if (ecb_expect_false (SvOBJECT (sv)))
263	{	582	{
264	HV *boolean_stash = !CBOR_SLOW \|\| types_boolean_stash	583	HV *boolean_stash = !CBOR_SLOW \|\| types_boolean_stash
265	? types_boolean_stash	584	? types_boolean_stash
…		…
270	HV *tagged_stash = !CBOR_SLOW \|\| cbor_tagged_stash	589	HV *tagged_stash = !CBOR_SLOW \|\| cbor_tagged_stash
271	? cbor_tagged_stash	590	? cbor_tagged_stash
272	: gv_stashpv ("CBOR::XS::Tagged" , 1);	591	: gv_stashpv ("CBOR::XS::Tagged" , 1);
273		592
274	HV *stash = SvSTASH (sv);	593	HV *stash = SvSTASH (sv);
275	GV *method;
276		594
277	if (stash == boolean_stash)	595	if (stash == boolean_stash)
278	encode_ch (enc, SvIV (sv) ? 0xe0 \| 21 : 0xe0 \| 20);	596	{
		597	encode_bool (enc, SvIV (sv));
		598	return;
		599	}
279	else if (stash == error_stash)	600	else if (stash == error_stash)
280	encode_ch (enc, 0xe0 \| 23);	601	{
		602	encode_ch (enc, MAJOR_MISC \| SIMPLE_UNDEF);
		603	return;
		604	}
281	else if (stash == tagged_stash)	605	else if (stash == tagged_stash)
282	{	606	{
283	if (svt != SVt_PVAV)	607	if (svt != SVt_PVAV)
284	croak ("encountered CBOR::XS::Tagged object that isn't an array");	608	croak ("encountered CBOR::XS::Tagged object that isn't an array");
285		609
		610	switch (av_len ((AV *)sv))
		611	{
		612	case 2-1:
		613	// actually a tagged value
286	encode_uint (enc, 0xc0, SvUV (av_fetch ((AV )sv, 0, 1)));	614	encode_uint (enc, MAJOR_TAG, SvUV (av_fetch ((AV )sv, 0, 1)));
287	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))
288	}	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))));
289	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))	661	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
290	{	662	{
291	dSP;	663	dSP;
292		664
293	ENTER; SAVETMPS; PUSHMARK (SP);	665	ENTER; SAVETMPS;
		666	PUSHMARK (SP);
294	// 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
295	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	668	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
296		669
297	PUTBACK;	670	PUTBACK;
298	// G_SCALAR ensures that return value is 1	671	// G_SCALAR ensures that return value is 1
…		…
311	}	684	}
312	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)	685	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
313	{	686	{
314	dSP;	687	dSP;
315		688
316	ENTER; SAVETMPS; PUSHMARK (SP);	689	ENTER; SAVETMPS;
		690	PUSHMARK (SP);
317	EXTEND (SP, 2);	691	EXTEND (SP, 2);
318	// 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
319	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	693	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
320	PUSHs (sv_cbor);	694	PUSHs (sv_cbor);
321		695
…		…
325		699
326	// catch this surprisingly common error	700	// catch this surprisingly common error
327	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)	701	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
328	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));
329		703
330	encode_uint (enc, 0xc0, CBOR_TAG_PERL_OBJECT);	704	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
331	encode_uint (enc, 0x80, count + 1);	705	encode_uint (enc, MAJOR_ARRAY, count + 1);
332	encode_str (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));	706	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
333		707
334	while (count)	708	{
		709	int i;
		710
		711	for (i = 0; i < count; ++i)
335	encode_sv (enc, SP[1 - count--]);	712	encode_sv (enc, SP[i + 1 - count]);
		713
		714	SP -= count;
		715	}
336		716
337	PUTBACK;	717	PUTBACK;
338		718
339	FREETMPS; LEAVE;	719	FREETMPS; LEAVE;
340	}	720	}
…		…
344	}	724	}
345	else if (svt == SVt_PVHV)	725	else if (svt == SVt_PVHV)
346	encode_hv (enc, (HV *)sv);	726	encode_hv (enc, (HV *)sv);
347	else if (svt == SVt_PVAV)	727	else if (svt == SVt_PVAV)
348	encode_av (enc, (AV *)sv);	728	encode_av (enc, (AV *)sv);
349	else if (svt < SVt_PVAV)
350	{
351	STRLEN len = 0;
352	char *pv = svt ? SvPV (sv, len) : 0;
353
354	if (len == 1 && *pv == '1')
355	encode_ch (enc, 0xe0 \| 21);
356	else if (len == 1 && *pv == '0')
357	encode_ch (enc, 0xe0 \| 20);
358	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
359	encode_ch (enc, 0xe0 \| 23);
360	else
361	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
362	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
363	}
364	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
365	encode_ch (enc, 0xe0 \| 23);
366	else	729	else
367	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	730	{
368	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	731	encode_tag (enc, CBOR_TAG_INDIRECTION);
		732	encode_sv (enc, sv);
		733	}
369	}	734	}
370		735
371	static void	736	static void
372	encode_nv (enc_t enc, SV sv)	737	encode_nv (enc_t enc, SV sv)
373	{	738	{
374	double nv = SvNVX (sv);	739	double nv = SvNVX (sv);
375		740
376	need (enc, 9);	741	need (enc, 9);
377		742
378	if (ecb_expect_false (nv == (U32)nv))	743	if (ecb_expect_false (nv == (NV)(U32)nv))
379	encode_uint (enc, 0x00, (U32)nv);	744	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
380	//TODO: maybe I32?	745	//TODO: maybe I32?
381	else if (ecb_expect_false (nv == (float)nv))	746	else if (ecb_expect_false (nv == (float)nv))
382	{	747	encode_float32 (enc, nv);
383	uint32_t fp = ecb_float_to_binary32 (nv);
384
385	*enc->cur++ = 0xe0 \| 26;
386
387	if (!ecb_big_endian ())
388	fp = ecb_bswap32 (fp);
389
390	memcpy (enc->cur, &fp, 4);
391	enc->cur += 4;
392	}
393	else	748	else
394	{	749	encode_float64 (enc, nv);
395	uint64_t fp = ecb_double_to_binary64 (nv);
396
397	*enc->cur++ = 0xe0 \| 27;
398
399	if (!ecb_big_endian ())
400	fp = ecb_bswap64 (fp);
401
402	memcpy (enc->cur, &fp, 8);
403	enc->cur += 8;
404	}
405	}	750	}
406		751
407	static void	752	static void
408	encode_sv (enc_t enc, SV sv)	753	encode_sv (enc_t enc, SV sv)
409	{	754	{
…		…
411		756
412	if (SvPOKp (sv))	757	if (SvPOKp (sv))
413	{	758	{
414	STRLEN len;	759	STRLEN len;
415	char *str = SvPV (sv, len);	760	char *str = SvPV (sv, len);
416	encode_str (enc, SvUTF8 (sv), str, len);	761	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
417	}	762	}
418	else if (SvNOKp (sv))	763	else if (SvNOKp (sv))
419	encode_nv (enc, sv);	764	encode_nv (enc, sv);
420	else if (SvIOKp (sv))	765	else if (SvIOKp (sv))
421	{	766	encode_int (enc, sv);
422	if (SvIsUV (sv))
423	encode_uint (enc, 0x00, SvUVX (sv));
424	else if (SvIVX (sv) >= 0)
425	encode_uint (enc, 0x00, SvIVX (sv));
426	else
427	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
428	}
429	else if (SvROK (sv))	767	else if (SvROK (sv))
430	encode_rv (enc, SvRV (sv));	768	encode_rv (enc, SvRV (sv));
431	else if (!SvOK (sv))	769	else if (!SvOK (sv))
432	encode_ch (enc, 0xe0 \| 22);	770	encode_ch (enc, MAJOR_MISC \| SIMPLE_NULL);
433	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	771	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
434	encode_ch (enc, 0xe0 \| 23);	772	encode_ch (enc, MAJOR_MISC \| SIMPLE_UNDEF);
435	else	773	else
436	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",
437	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	775	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
438	}	776	}
439		777
440	static SV *	778	static SV *
441	encode_cbor (SV scalar, CBOR cbor)	779	encode_cbor (SV scalar, CBOR cbor)
442	{	780	{
443	enc_t enc;	781	enc_t enc = { 0 };
444		782
445	enc.cbor = *cbor;	783	enc.cbor = *cbor;
446	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	784	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
447	enc.cur = SvPVX (enc.sv);	785	enc.cur = SvPVX (enc.sv);
448	enc.end = SvEND (enc.sv);	786	enc.end = SvEND (enc.sv);
449	enc.depth = 0;
450		787
451	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
452	encode_sv (&enc, scalar);	797	encode_sv (&enc, scalar);
453		798
454	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	799	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
455	*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
456		801
…		…
470	U8 *end; // end of input string	815	U8 *end; // end of input string
471	const char *err; // parse error, if != 0	816	const char *err; // parse error, if != 0
472	CBOR cbor;	817	CBOR cbor;
473	U32 depth; // recursion depth	818	U32 depth; // recursion depth
474	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
475	} dec_t;	824	} dec_t;
476		825
477	#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);
478		833
479	#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;
480		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
481	#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)
482	#define DEC_DEC_DEPTH --dec->depth	863	#define DEC_DEC_DEPTH --dec->depth
483		864
484	static UV	865	static UV
485	decode_uint (dec_t *dec)	866	decode_uint (dec_t *dec)
486	{	867	{
487	switch (*dec->cur & 31)	868	U8 m = *dec->cur & MINOR_MASK;
488	{	869	++dec->cur;
489	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
490	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
491	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
492	return *dec->cur++ & 31;
493		870
494	case 24:	871	if (ecb_expect_true (m < LENGTH_EXT1))
		872	return m;
		873	else if (ecb_expect_true (m == LENGTH_EXT1))
		874	{
495	WANT (2);	875	WANT (1);
496	dec->cur += 2;	876	dec->cur += 1;
497	return dec->cur[-1];	877	return dec->cur[-1];
498		878	}
499	case 25:	879	else if (ecb_expect_true (m == LENGTH_EXT2))
		880	{
500	WANT (3);	881	WANT (2);
501	dec->cur += 3;	882	dec->cur += 2;
502	return (((UV)dec->cur[-2]) << 8)	883	return (((UV)dec->cur[-2]) << 8)
503	\| ((UV)dec->cur[-1]);	884	\| ((UV)dec->cur[-1]);
504		885	}
505	case 26:	886	else if (ecb_expect_true (m == LENGTH_EXT4))
		887	{
506	WANT (5);	888	WANT (4);
507	dec->cur += 5;	889	dec->cur += 4;
508	return (((UV)dec->cur[-4]) << 24)	890	return (((UV)dec->cur[-4]) << 24)
509	\| (((UV)dec->cur[-3]) << 16)	891	\| (((UV)dec->cur[-3]) << 16)
510	\| (((UV)dec->cur[-2]) << 8)	892	\| (((UV)dec->cur[-2]) << 8)
511	\| ((UV)dec->cur[-1]);	893	\| ((UV)dec->cur[-1]);
512		894	}
513	case 27:	895	else if (ecb_expect_true (m == LENGTH_EXT8))
		896	{
514	WANT (9);	897	WANT (8);
515	dec->cur += 9;	898	dec->cur += 8;
		899
		900	return
		901	#if UVSIZE < 8
		902	0
		903	#else
516	return (((UV)dec->cur[-8]) << 56)	904	(((UV)dec->cur[-8]) << 56)
517	\| (((UV)dec->cur[-7]) << 48)	905	\| (((UV)dec->cur[-7]) << 48)
518	\| (((UV)dec->cur[-6]) << 40)	906	\| (((UV)dec->cur[-6]) << 40)
519	\| (((UV)dec->cur[-5]) << 32)	907	\| (((UV)dec->cur[-5]) << 32)
		908	#endif
520	\| (((UV)dec->cur[-4]) << 24)	909	\| (((UV)dec->cur[-4]) << 24)
521	\| (((UV)dec->cur[-3]) << 16)	910	\| (((UV)dec->cur[-3]) << 16)
522	\| (((UV)dec->cur[-2]) << 8)	911	\| (((UV)dec->cur[-2]) << 8)
523	\| ((UV)dec->cur[-1]);	912	\| ((UV)dec->cur[-1]);
524		913	}
525	default:	914	else
526	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	915	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
527	}
528		916
529	fail:	917	fail:
530	return 0;	918	return 0;
531	}	919	}
532		920
…		…
537	{	925	{
538	AV *av = newAV ();	926	AV *av = newAV ();
539		927
540	DEC_INC_DEPTH;	928	DEC_INC_DEPTH;
541		929
542	if ((*dec->cur & 31) == 31)	930	if (*dec->cur == (MAJOR_ARRAY \| MINOR_INDEF))
543	{	931	{
544	++dec->cur;	932	++dec->cur;
545		933
546	for (;;)	934	for (;;)
547	{	935	{
548	WANT (1);	936	WANT (1);
549		937
550	if (*dec->cur == (0xe0 \| 31))	938	if (*dec->cur == (MAJOR_MISC \| MINOR_INDEF) \|\| dec->err)
551	{	939	{
552	++dec->cur;	940	++dec->cur;
553	break;	941	break;
554	}	942	}
555		943
556	av_push (av, decode_sv (dec));	944	av_push (av, decode_sv (dec));
557	}	945	}
558	}	946	}
559	else	947	else
560	{	948	{
561	int i, len = decode_uint (dec);	949	UV i, len = decode_uint (dec);
562		950
		951	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
563	av_fill (av, len - 1);	952	av_fill (av, len - 1);
564		953
565	for (i = 0; i < len; ++i)	954	for (i = 0; i < len; ++i)
566	AvARRAY (av)[i] = decode_sv (dec);	955	AvARRAY (av)[i] = decode_sv (dec);
567	}	956	}
568		957
569	DEC_DEC_DEPTH;	958	DEC_DEC_DEPTH;
570	return newRV_noinc ((SV *)av);	959	return newRV_noinc ((SV *)av);
571		960
572	fail:	961	fail:
573	SvREFCNT_dec (av);	962	SvREFCNT_dec_NN (av);
574	DEC_DEC_DEPTH;	963	DEC_DEC_DEPTH;
575	return &PL_sv_undef;	964	return &PL_sv_undef;
576	}	965	}
577		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
578	static SV *	1041	static SV *
579	decode_hv (dec_t *dec)	1042	decode_hv (dec_t *dec)
580	{	1043	{
581	HV *hv = newHV ();	1044	HV *hv = newHV ();
582		1045
583	DEC_INC_DEPTH;	1046	DEC_INC_DEPTH;
584		1047
585	if ((*dec->cur & 31) == 31)	1048	if (*dec->cur == (MAJOR_MAP \| MINOR_INDEF))
586	{	1049	{
587	++dec->cur;	1050	++dec->cur;
588		1051
589	for (;;)	1052	for (;;)
590	{	1053	{
591	WANT (1);	1054	WANT (1);
592		1055
593	if (*dec->cur == (0xe0 \| 31))	1056	if (*dec->cur == (MAJOR_MISC \| MINOR_INDEF) \|\| dec->err)
594	{	1057	{
595	++dec->cur;	1058	++dec->cur;
596	break;	1059	break;
597	}	1060	}
598		1061
599	SV *k = decode_sv (dec);	1062	decode_he (dec, hv);
600	SV *v = decode_sv (dec);
601
602	hv_store_ent (hv, k, v, 0);
603	}	1063	}
604	}	1064	}
605	else	1065	else
606	{	1066	{
607	int len = decode_uint (dec);	1067	UV pairs = decode_uint (dec);
608		1068
		1069	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1070
609	while (len--)	1071	while (pairs--)
610	{	1072	decode_he (dec, hv);
611	SV *k = decode_sv (dec);
612	SV *v = decode_sv (dec);
613
614	hv_store_ent (hv, k, v, 0);
615	}
616	}	1073	}
617		1074
618	DEC_DEC_DEPTH;	1075	DEC_DEC_DEPTH;
619	return newRV_noinc ((SV *)hv);	1076	return newRV_noinc ((SV *)hv);
620		1077
621	fail:	1078	fail:
622	SvREFCNT_dec (hv);	1079	SvREFCNT_dec_NN (hv);
623	DEC_DEC_DEPTH;	1080	DEC_DEC_DEPTH;
624	return &PL_sv_undef;	1081	return &PL_sv_undef;
625	}	1082	}
626		1083
627	static SV *	1084	static SV *
628	decode_str (dec_t *dec, int utf8)	1085	decode_str (dec_t *dec, int utf8)
629	{	1086	{
630	SV *sv = 0;	1087	SV *sv = 0;
631		1088
632	if ((*dec->cur & 31) == 31)	1089	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
633	{	1090	{
		1091	// indefinite length strings
634	++dec->cur;	1092	++dec->cur;
635		1093
		1094	U8 major = *dec->cur & MAJOR_MISC;
		1095
636	sv = newSVpvn ("", 0);	1096	sv = newSVpvn ("", 0);
637		1097
638	// not very fast, and certainly not robust against illegal input
639	for (;;)	1098	for (;;)
640	{	1099	{
641	WANT (1);	1100	WANT (1);
642		1101
643	if (*dec->cur == (0xe0 \| 31))	1102	if ((*dec->cur - major) > LENGTH_EXT8)
		1103	if (*dec->cur == (MAJOR_MISC \| MINOR_INDEF))
644	{	1104	{
645	++dec->cur;	1105	++dec->cur;
646	break;	1106	break;
647	}	1107	}
		1108	else
		1109	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
648		1110
649	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;
650	}	1116	}
651	}	1117	}
652	else	1118	else
653	{	1119	{
654	STRLEN len = decode_uint (dec);	1120	STRLEN len = decode_uint (dec);
655		1121
656	WANT (len);	1122	WANT (len);
657	sv = newSVpvn (dec->cur, len);	1123	sv = newSVpvn (dec->cur, len);
658	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));
659	}	1129	}
660		1130
661	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
662	SvUTF8_on (sv);	1137	SvUTF8_on (sv);
		1138	}
663		1139
664	return sv;	1140	return sv;
665		1141
666	fail:	1142	fail:
667	SvREFCNT_dec (sv);	1143	SvREFCNT_dec (sv);
…		…
669	}	1145	}
670		1146
671	static SV *	1147	static SV *
672	decode_tagged (dec_t *dec)	1148	decode_tagged (dec_t *dec)
673	{	1149	{
		1150	SV *sv = 0;
674	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:
675	SV *sv = decode_sv (dec);	1158	sv = decode_sv (dec);
		1159	break;
676		1160
677	if (tag == CBOR_TAG_MAGIC)	1161	case CBOR_TAG_INDIRECTION:
678	return sv;	1162	sv = newRV_noinc (decode_sv (dec));
679	else if (tag == CBOR_TAG_PERL_OBJECT)	1163	break;
680	{	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
681	if (!SvROK (sv) \|\| SvTYPE (SvRV (sv)) != SVt_PVAV)	1264	if (!SvROK (sv) \|\| SvTYPE (SvRV (sv)) != SVt_PVAV)
682	ERR ("corrupted CBOR data (non-array perl object)");	1265	ERR ("corrupted CBOR data (non-array perl object)");
683		1266
684	AV av = (AV )SvRV (sv);	1267	AV av = (AV )SvRV (sv);
685	int len = av_len (av) + 1;	1268	int len = av_len (av) + 1;
686	HV stash = gv_stashsv (av_fetch (av, 0, 1), 0);	1269	HV stash = gv_stashsv (av_fetch (av, 0, 1), 0);
687		1270
688	if (!stash)	1271	if (!stash)
689	ERR ("cannot decode perl-object (package does not exist)");	1272	ERR ("cannot decode perl-object (package does not exist)");
690		1273
691	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);	1274	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
692		1275
693	if (!method)	1276	if (!method)
694	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)");
695		1278
696	dSP;	1279	dSP;
697		1280
698	ENTER; SAVETMPS; PUSHMARK (SP);	1281	ENTER; SAVETMPS;
		1282	PUSHMARK (SP);
699	EXTEND (SP, len + 1);	1283	EXTEND (SP, len + 1);
700	// 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
701	PUSHs (*av_fetch (av, 0, 1));	1285	PUSHs (*av_fetch (av, 0, 1));
702	PUSHs (sv_cbor);	1286	PUSHs (sv_cbor);
703		1287
704	int i;	1288	int i;
705		1289
706	for (i = 1; i < len; ++i)	1290	for (i = 1; i < len; ++i)
707	PUSHs (*av_fetch (av, i, 1));	1291	PUSHs (*av_fetch (av, i, 1));
708		1292
709	PUTBACK;	1293	PUTBACK;
710	call_sv ((SV *)GvCV (method), G_SCALAR);	1294	call_sv ((SV *)GvCV (method), G_SCALAR \| G_EVAL);
711	SPAGAIN;	1295	SPAGAIN;
712		1296
		1297	if (SvTRUE (ERRSV))
		1298	{
		1299	FREETMPS; LEAVE;
		1300	ERR_ERRSV;
		1301	}
		1302
		1303	SvREFCNT_dec_NN (sv);
713	sv = SvREFCNT_inc (POPs);	1304	sv = SvREFCNT_inc (POPs);
714		1305
715	PUTBACK;	1306	PUTBACK;
716		1307
717	FREETMPS; LEAVE;	1308	FREETMPS; LEAVE;
		1309	}
		1310	break;
718		1311
719	return sv;	1312	default:
720	}	1313	filter:
721	else	1314	{
722	{	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	{
723	AV *av = newAV ();	1346	AV *av = newAV ();
724	av_push (av, newSVuv (tag));	1347	av_push (av, tag_sv);
725	av_push (av, sv);	1348	av_push (av, sv);
726		1349
727	HV *tagged_stash = !CBOR_SLOW \|\| cbor_tagged_stash	1350	HV *tagged_stash = !CBOR_SLOW \|\| cbor_tagged_stash
728	? cbor_tagged_stash	1351	? cbor_tagged_stash
729	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1352	: gv_stashpv ("CBOR::XS::Tagged" , 1);
730
731	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;
732	}	1361	}
		1362
		1363	return sv;
733		1364
734	fail:	1365	fail:
735	SvREFCNT_dec (sv);	1366	SvREFCNT_dec (sv);
736	return &PL_sv_undef;	1367	return &PL_sv_undef;
737	}	1368	}
…		…
739	static SV *	1370	static SV *
740	decode_sv (dec_t *dec)	1371	decode_sv (dec_t *dec)
741	{	1372	{
742	WANT (1);	1373	WANT (1);
743		1374
744	switch (*dec->cur >> 5)	1375	switch (*dec->cur >> MAJOR_SHIFT)
745	{	1376	{
746	case 0: // unsigned int	1377	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
747	return newSVuv (decode_uint (dec));	1378	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
748	case 1: // negative int	1379	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
749	return newSViv (-1 - (IV)decode_uint (dec));	1380	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
750	case 2: // octet string	1381	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
751	return decode_str (dec, 0);	1382	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
752	case 3: // utf-8 string	1383	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
753	return decode_str (dec, 1);	1384
754	case 4: // array	1385	case MAJOR_MISC >> MAJOR_SHIFT:
755	return decode_av (dec);
756	case 5: // map
757	return decode_hv (dec);
758	case 6: // tag
759	return decode_tagged (dec);
760	case 7: // misc
761	switch (*dec->cur++ & 31)	1386	switch (*dec->cur++ & MINOR_MASK)
762	{	1387	{
763	case 20:	1388	case SIMPLE_FALSE:
764	#if CBOR_SLOW	1389	#if CBOR_SLOW
765	types_false = get_bool ("Types::Serialiser::false");	1390	types_false = get_bool ("Types::Serialiser::false");
766	#endif	1391	#endif
767	return newSVsv (types_false);	1392	return newSVsv (types_false);
768	case 21:	1393	case SIMPLE_TRUE:
769	#if CBOR_SLOW	1394	#if CBOR_SLOW
770	types_true = get_bool ("Types::Serialiser::true");	1395	types_true = get_bool ("Types::Serialiser::true");
771	#endif	1396	#endif
772	return newSVsv (types_true);	1397	return newSVsv (types_true);
773	case 22:	1398	case SIMPLE_NULL:
774	return newSVsv (&PL_sv_undef);	1399	return newSVsv (&PL_sv_undef);
775	case 23:	1400	case SIMPLE_UNDEF:
776	#if CBOR_SLOW	1401	#if CBOR_SLOW
777	types_error = get_bool ("Types::Serialiser::error");	1402	types_error = get_bool ("Types::Serialiser::error");
778	#endif	1403	#endif
779	return newSVsv (types_error);	1404	return newSVsv (types_error);
780		1405
781	case 25:	1406	case MISC_FLOAT16:
782	{	1407	{
783	WANT (2);	1408	WANT (2);
784		1409
785	uint16_t fp = (dec->cur[0] << 8) \| dec->cur[1];	1410	uint16_t fp = (dec->cur[0] << 8) \| dec->cur[1];
786	dec->cur += 2;	1411	dec->cur += 2;
787		1412
788	return newSVnv (ecb_binary16_to_float (fp));	1413	return newSVnv (ecb_binary16_to_float (fp));
789	}	1414	}
790		1415
791	case 26:	1416	case MISC_FLOAT32:
792	{	1417	{
793	uint32_t fp;	1418	uint32_t fp;
794	WANT (4);	1419	WANT (4);
795	memcpy (&fp, dec->cur, 4);	1420	memcpy (&fp, dec->cur, 4);
796	dec->cur += 4;	1421	dec->cur += 4;
…		…
799	fp = ecb_bswap32 (fp);	1424	fp = ecb_bswap32 (fp);
800		1425
801	return newSVnv (ecb_binary32_to_float (fp));	1426	return newSVnv (ecb_binary32_to_float (fp));
802	}	1427	}
803		1428
804	case 27:	1429	case MISC_FLOAT64:
805	{	1430	{
806	uint64_t fp;	1431	uint64_t fp;
807	WANT (8);	1432	WANT (8);
808	memcpy (&fp, dec->cur, 8);	1433	memcpy (&fp, dec->cur, 8);
809	dec->cur += 8;	1434	dec->cur += 8;
…		…
812	fp = ecb_bswap64 (fp);	1437	fp = ecb_bswap64 (fp);
813		1438
814	return newSVnv (ecb_binary64_to_double (fp));	1439	return newSVnv (ecb_binary64_to_double (fp));
815	}	1440	}
816		1441
817	// 0..19 unassigned	1442	// 0..19 unassigned simple
818	// 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
819	default:	1446	default:
820	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1447	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
821	}	1448	}
822		1449
823	break;	1450	break;
824	}	1451	}
825		1452
…		…
828	}	1455	}
829		1456
830	static SV *	1457	static SV *
831	decode_cbor (SV string, CBOR cbor, char **offset_return)	1458	decode_cbor (SV string, CBOR cbor, char **offset_return)
832	{	1459	{
833	dec_t dec;	1460	dec_t dec = { 0 };
834	SV *sv;	1461	SV *sv;
		1462	STRLEN len;
		1463	char *data = SvPVbyte (string, len);
835		1464
836	/* work around bugs in 5.10 where manipulating magic values
837	* makes perl ignore the magic in subsequent accesses.
838	* also make a copy of non-PV values, to get them into a clean
839	* state (SvPV should do that, but it's buggy, see below).
840	*/
841	/SvGETMAGIC (string);/
842	if (SvMAGICAL (string) \|\| !SvPOK (string))
843	string = sv_2mortal (newSVsv (string));
844
845	SvUPGRADE (string, SVt_PV);
846
847	/* work around a bug in perl 5.10, which causes SvCUR to fail an
848	* assertion with -DDEBUGGING, although SvCUR is documented to
849	* return the xpv_cur field which certainly exists after upgrading.
850	* according to nicholas clark, calling SvPOK fixes this.
851	* But it doesn't fix it, so try another workaround, call SvPV_nolen
852	* and hope for the best.
853	* Damnit, SvPV_nolen still trips over yet another assertion. This
854	* assertion business is seriously broken, try yet another workaround
855	* for the broken -DDEBUGGING.
856	*/
857	{
858	#ifdef DEBUGGING
859	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
860	#else
861	STRLEN offset = SvCUR (string);
862	#endif
863
864	if (offset > cbor->max_size && cbor->max_size)	1465	if (len > cbor->max_size && cbor->max_size)
865	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",
866	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1467	(unsigned long)len, (unsigned long)cbor->max_size);
867	}
868
869	sv_utf8_downgrade (string, 0);
870		1468
871	dec.cbor = *cbor;	1469	dec.cbor = *cbor;
872	dec.cur = (U8 *)SvPVX (string);	1470	dec.cur = (U8 *)data;
873	dec.end = (U8 *)SvEND (string);	1471	dec.end = (U8 *)data + len;
874	dec.err = 0;
875	dec.depth = 0;
876		1472
877	sv = decode_sv (&dec);	1473	sv = decode_sv (&dec);
878		1474
879	if (offset_return)	1475	if (offset_return)
880	*offset_return = dec.cur;	1476	*offset_return = dec.cur;
…		…
883	if (dec.cur != dec.end && !dec.err)	1479	if (dec.cur != dec.end && !dec.err)
884	dec.err = "garbage after CBOR object";	1480	dec.err = "garbage after CBOR object";
885		1481
886	if (dec.err)	1482	if (dec.err)
887	{	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
888	SvREFCNT_dec (sv);	1495	SvREFCNT_dec_NN (sv);
		1496
		1497	if (dec.err_sv)
		1498	sv_2mortal (dec.err_sv);
		1499
889	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);
890	}	1501	}
891		1502
892	sv = sv_2mortal (sv);	1503	sv = sv_2mortal (sv);
893		1504
894	return sv;	1505	return sv;
895	}	1506	}
896		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
897	/////////////////////////////////////////////////////////////////////////////	1633	/////////////////////////////////////////////////////////////////////////////
898	// XS interface functions	1634	// XS interface functions
899		1635
900	MODULE = CBOR::XS PACKAGE = CBOR::XS	1636	MODULE = CBOR::XS PACKAGE = CBOR::XS
901		1637
…		…
909		1645
910	types_true = get_bool ("Types::Serialiser::true" );	1646	types_true = get_bool ("Types::Serialiser::true" );
911	types_false = get_bool ("Types::Serialiser::false");	1647	types_false = get_bool ("Types::Serialiser::false");
912	types_error = get_bool ("Types::Serialiser::error");	1648	types_error = get_bool ("Types::Serialiser::error");
913		1649
		1650	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1651
914	sv_cbor = newSVpv ("CBOR", 0);	1652	sv_cbor = newSVpv ("CBOR", 0);
915	SvREADONLY_on (sv_cbor);	1653	SvREADONLY_on (sv_cbor);
		1654
		1655	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
916	}	1656	}
917		1657
918	PROTOTYPES: DISABLE	1658	PROTOTYPES: DISABLE
919		1659
920	void CLONE (...)	1660	void CLONE (...)
…		…
938		1678
939	void shrink (CBOR *self, int enable = 1)	1679	void shrink (CBOR *self, int enable = 1)
940	ALIAS:	1680	ALIAS:
941	shrink = F_SHRINK	1681	shrink = F_SHRINK
942	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
943	PPCODE:	1690	PPCODE:
944	{	1691	{
945	if (enable)	1692	if (enable)
946	self->flags \|= ix;	1693	self->flags \|= ix;
947	else	1694	else
…		…
952		1699
953	void get_shrink (CBOR *self)	1700	void get_shrink (CBOR *self)
954	ALIAS:	1701	ALIAS:
955	get_shrink = F_SHRINK	1702	get_shrink = F_SHRINK
956	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
957	PPCODE:	1711	PPCODE:
958	XPUSHs (boolSV (self->flags & ix));	1712	XPUSHs (boolSV (self->flags & ix));
959		1713
960	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1714	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
961	PPCODE:	1715	PPCODE:
…		…
977	CODE:	1731	CODE:
978	RETVAL = self->max_size;	1732	RETVAL = self->max_size;
979	OUTPUT:	1733	OUTPUT:
980	RETVAL	1734	RETVAL
981		1735
982	#if 0 //TODO	1736	void filter (CBOR self, SV filter = 0)
983
984	void filter_cbor_object (CBOR self, SV cb = &PL_sv_undef)
985	PPCODE:	1737	PPCODE:
986	{
987	SvREFCNT_dec (self->cb_object);	1738	SvREFCNT_dec (self->filter);
988	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1739	self->filter = filter ? newSVsv (filter) : filter;
989
990	XPUSHs (ST (0));	1740	XPUSHs (ST (0));
991	}
992		1741
993	void filter_cbor_single_key_object (CBOR self, SV key, SV *cb = &PL_sv_undef)	1742	SV get_filter (CBOR self)
994	PPCODE:	1743	CODE:
995	{	1744	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
996	if (!self->cb_sk_object)	1745	OUTPUT:
997	self->cb_sk_object = newHV ();	1746	RETVAL
998
999	if (SvOK (cb))
1000	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1001	else
1002	{
1003	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1004
1005	if (!HvKEYS (self->cb_sk_object))
1006	{
1007	SvREFCNT_dec (self->cb_sk_object);
1008	self->cb_sk_object = 0;
1009	}
1010	}
1011
1012	XPUSHs (ST (0));
1013	}
1014
1015	#endif
1016		1747
1017	void encode (CBOR self, SV scalar)	1748	void encode (CBOR self, SV scalar)
1018	PPCODE:	1749	PPCODE:
1019	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1750	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1020	XPUSHs (scalar);	1751	XPUSHs (scalar);
…		…
1033	EXTEND (SP, 2);	1764	EXTEND (SP, 2);
1034	PUSHs (sv);	1765	PUSHs (sv);
1035	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1766	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1036	}	1767	}
1037		1768
1038	#if 0	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	}
1039		1820
1040	void DESTROY (CBOR *self)	1821	void DESTROY (CBOR *self)
1041	CODE:	1822	PPCODE:
1042	SvREFCNT_dec (self->cb_sk_object);	1823	cbor_free (self);
1043	SvREFCNT_dec (self->cb_object);
1044
1045	#endif
1046		1824
1047	PROTOTYPES: ENABLE	1825	PROTOTYPES: ENABLE
1048		1826
1049	void encode_cbor (SV *scalar)	1827	void encode_cbor (SV *scalar)
		1828	ALIAS:
		1829	encode_cbor = 0
		1830	encode_cbor_sharing = F_ALLOW_SHARING
1050	PPCODE:	1831	PPCODE:
1051	{	1832	{
1052	CBOR cbor;	1833	CBOR cbor;
1053	cbor_init (&cbor);	1834	cbor_init (&cbor);
		1835	cbor.flags \|= ix;
1054	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1836	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1055	XPUSHs (scalar);	1837	XPUSHs (scalar);
1056	}	1838	}
1057		1839
1058	void decode_cbor (SV *cborstr)	1840	void decode_cbor (SV *cborstr)
…		…
1062	cbor_init (&cbor);	1844	cbor_init (&cbor);
1063	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1845	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1064	XPUSHs (cborstr);	1846	XPUSHs (cborstr);
1065	}	1847	}
1066		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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Comparing CBOR-XS/XS.xs (file contents): Revision 1.11 by root, Sun Oct 27 22:35:15 2013 UTC vs. Revision 1.79 by root, Fri Sep 8 06:05:01 2023 UTC

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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.11 by root, Sun Oct 27 22:35:15 2013 UTC vs.
Revision 1.79 by root, Fri Sep 8 06:05:01 2023 UTC