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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.16 by root, Tue Oct 29 20:59:16 2013 UTC vs.
Revision 1.73 by root, Sat Oct 23 03:00:31 2021 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
589	static void	967	static void
590	decode_he (dec_t *dec, HV *hv)	968	decode_he (dec_t *dec, HV *hv)
591	{	969	{
592	// for speed reasons, we specialcase single-string	970	// for speed reasons, we specialcase single-string
593	// byte or utf-8 strings as keys.	971	// byte or utf-8 strings as keys, but only when !stringref
594		972
595	if (*dec->cur >= 0x40 && *dec->cur <= 0x40 + 27)	973	if (ecb_expect_true (!dec->stringref))
		974	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
596	{	975	{
597	I32 len = decode_uint (dec);	976	STRLEN len = decode_uint (dec);
598	char *key = (char *)dec->cur;	977	char *key = (char *)dec->cur;
599		978
		979	WANT (len);
600	dec->cur += len;	980	dec->cur += len;
601		981
602	hv_store (hv, key, len, decode_sv (dec), 0);	982	hv_store (hv, key, len, decode_sv (dec), 0);
		983
		984	return;
603	}	985	}
604	else if (*dec->cur >= 0x60 && *dec->cur <= 0x60 + 27)	986	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
605	{	987	{
606	I32 len = decode_uint (dec);	988	STRLEN len = decode_uint (dec);
607	char *key = (char *)dec->cur;	989	char *key = (char *)dec->cur;
608		990
		991	WANT (len);
609	dec->cur += len;	992	dec->cur += len;
610		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
611	hv_store (hv, key, -len, decode_sv (dec), 0);	998	hv_store (hv, key, -len, decode_sv (dec), 0);
		999
		1000	return;
612	}	1001	}
613	else	1002
614	{
615	SV *k = decode_sv (dec);	1003	SV *k = decode_sv (dec);
616	SV *v = decode_sv (dec);	1004	SV *v = decode_sv (dec);
617		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
618	hv_store_ent (hv, k, v, 0);	1034	hv_store_ent (hv, k, v, 0);
619	SvREFCNT_dec (k);	1035	SvREFCNT_dec_NN (k);
620	}	1036
		1037	fail:
		1038	;
621	}	1039	}
622		1040
623	static SV *	1041	static SV *
624	decode_hv (dec_t *dec)	1042	decode_hv (dec_t *dec)
625	{	1043	{
626	HV *hv = newHV ();	1044	HV *hv = newHV ();
627		1045
628	DEC_INC_DEPTH;	1046	DEC_INC_DEPTH;
629		1047
630	if ((*dec->cur & 31) == 31)	1048	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
631	{	1049	{
632	++dec->cur;	1050	++dec->cur;
633		1051
634	for (;;)	1052	for (;;)
635	{	1053	{
636	WANT (1);	1054	WANT (1);
637		1055
638	if (*dec->cur == (0xe0 | 31))	1056	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
639	{	1057	{
640	++dec->cur;	1058	++dec->cur;
641	break;	1059	break;
642	}	1060	}
643		1061
644	decode_he (dec, hv);	1062	decode_he (dec, hv);
645	}	1063	}
646	}	1064	}
647	else	1065	else
648	{	1066	{
649	int pairs = decode_uint (dec);	1067	UV pairs = decode_uint (dec);
		1068
		1069	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
650		1070
651	while (pairs--)	1071	while (pairs--)
652	decode_he (dec, hv);	1072	decode_he (dec, hv);
653	}	1073	}
654		1074
655	DEC_DEC_DEPTH;	1075	DEC_DEC_DEPTH;
656	return newRV_noinc ((SV *)hv);	1076	return newRV_noinc ((SV *)hv);
657		1077
658	fail:	1078	fail:
659	SvREFCNT_dec (hv);	1079	SvREFCNT_dec_NN (hv);
660	DEC_DEC_DEPTH;	1080	DEC_DEC_DEPTH;
661	return &PL_sv_undef;	1081	return &PL_sv_undef;
662	}	1082	}
663		1083
664	static SV *	1084	static SV *
665	decode_str (dec_t *dec, int utf8)	1085	decode_str (dec_t *dec, int utf8)
666	{	1086	{
667	SV *sv = 0;	1087	SV *sv = 0;
668		1088
669	if ((*dec->cur & 31) == 31)	1089	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
670	{	1090	{
		1091	// indefinite length strings
671	++dec->cur;	1092	++dec->cur;
672		1093
		1094	U8 major = *dec->cur & MAJOR_MISC;
		1095
673	sv = newSVpvn ("", 0);	1096	sv = newSVpvn ("", 0);
674		1097
675	// not very fast, and certainly not robust against illegal input
676	for (;;)	1098	for (;;)
677	{	1099	{
678	WANT (1);	1100	WANT (1);
679		1101
680	if (*dec->cur == (0xe0 | 31))	1102	if ((*dec->cur - major) > LENGTH_EXT8)
		1103	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
681	{	1104	{
682	++dec->cur;	1105	++dec->cur;
683	break;	1106	break;
684	}	1107	}
		1108	else
		1109	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
685		1110
686	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;
687	}	1116	}
688	}	1117	}
689	else	1118	else
690	{	1119	{
691	STRLEN len = decode_uint (dec);	1120	STRLEN len = decode_uint (dec);
692		1121
693	WANT (len);	1122	WANT (len);
694	sv = newSVpvn (dec->cur, len);	1123	sv = newSVpvn (dec->cur, len);
695	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));
696	}	1129	}
697		1130
698	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
699	SvUTF8_on (sv);	1137	SvUTF8_on (sv);
		1138	}
700		1139
701	return sv;	1140	return sv;
702		1141
703	fail:	1142	fail:
704	SvREFCNT_dec (sv);	1143	SvREFCNT_dec (sv);
…		…
706	}	1145	}
707		1146
708	static SV *	1147	static SV *
709	decode_tagged (dec_t *dec)	1148	decode_tagged (dec_t *dec)
710	{	1149	{
		1150	SV *sv = 0;
711	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:
712	SV *sv = decode_sv (dec);	1158	sv = decode_sv (dec);
		1159	break;
713		1160
714	if (tag == CBOR_TAG_MAGIC)	1161	case CBOR_TAG_INDIRECTION:
715	return sv;	1162	sv = newRV_noinc (decode_sv (dec));
716	else if (tag == CBOR_TAG_PERL_OBJECT)	1163	break;
717	{	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	sv = newSV (0);
		1202	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1203
		1204	SV *osv = decode_sv (dec);
		1205	sv_setsv (sv, osv);
		1206	SvREFCNT_dec_NN (osv);
		1207	}
		1208	else
		1209	{
		1210	av_push (dec->shareable, &PL_sv_undef);
		1211	int idx = AvFILLp (dec->shareable);
		1212	sv = decode_sv (dec);
		1213	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1214	}
		1215	}
		1216	break;
		1217
		1218	case CBOR_TAG_VALUE_SHAREDREF:
		1219	{
		1220	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1221	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1222
		1223	UV idx = decode_uint (dec);
		1224
		1225	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
		1226	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1227
		1228	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1229
		1230	if (sv == &PL_sv_undef)
		1231	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1232	}
		1233	break;
		1234
		1235	case CBOR_TAG_PERL_OBJECT:
		1236	{
		1237	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1238	goto filter;
		1239
		1240	sv = decode_sv (dec);
		1241
718	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)	1242	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
719	ERR ("corrupted CBOR data (non-array perl object)");	1243	ERR ("corrupted CBOR data (non-array perl object)");
720		1244
721	AV *av = (AV *)SvRV (sv);	1245	AV *av = (AV *)SvRV (sv);
722	int len = av_len (av) + 1;	1246	int len = av_len (av) + 1;
723	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);	1247	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
724		1248
725	if (!stash)	1249	if (!stash)
726	ERR ("cannot decode perl-object (package does not exist)");	1250	ERR ("cannot decode perl-object (package does not exist)");
727		1251
728	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);	1252	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
729		1253
730	if (!method)	1254	if (!method)
731	ERR ("cannot decode perl-object (package does not have a THAW method)");	1255	ERR ("cannot decode perl-object (package does not have a THAW method)");
732		1256
733	dSP;	1257	dSP;
734		1258
735	ENTER; SAVETMPS; PUSHMARK (SP);	1259	ENTER; SAVETMPS;
		1260	PUSHMARK (SP);
736	EXTEND (SP, len + 1);	1261	EXTEND (SP, len + 1);
737	// we re-bless the reference to get overload and other niceties right	1262	// we re-bless the reference to get overload and other niceties right
738	PUSHs (*av_fetch (av, 0, 1));	1263	PUSHs (*av_fetch (av, 0, 1));
739	PUSHs (sv_cbor);	1264	PUSHs (sv_cbor);
740		1265
741	int i;	1266	int i;
742		1267
743	for (i = 1; i < len; ++i)	1268	for (i = 1; i < len; ++i)
744	PUSHs (*av_fetch (av, i, 1));	1269	PUSHs (*av_fetch (av, i, 1));
745		1270
746	PUTBACK;	1271	PUTBACK;
747	call_sv ((SV *)GvCV (method), G_SCALAR);	1272	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
748	SPAGAIN;	1273	SPAGAIN;
749		1274
		1275	if (SvTRUE (ERRSV))
		1276	{
		1277	FREETMPS; LEAVE;
		1278	ERR_ERRSV;
		1279	}
		1280
750	SvREFCNT_dec (sv);	1281	SvREFCNT_dec_NN (sv);
751	sv = SvREFCNT_inc (POPs);	1282	sv = SvREFCNT_inc (POPs);
752		1283
753	PUTBACK;	1284	PUTBACK;
754		1285
755	FREETMPS; LEAVE;	1286	FREETMPS; LEAVE;
		1287	}
		1288	break;
756		1289
757	return sv;	1290	default:
758	}	1291	filter:
759	else	1292	{
760	{	1293	SV *tag_sv = newSVuv (tag);
		1294
		1295	sv = decode_sv (dec);
		1296
		1297	dSP;
		1298	ENTER; SAVETMPS;
		1299	PUSHMARK (SP);
		1300	EXTEND (SP, 2);
		1301	PUSHs (tag_sv);
		1302	PUSHs (sv);
		1303
		1304	PUTBACK;
		1305	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1306	SPAGAIN;
		1307
		1308	if (SvTRUE (ERRSV))
		1309	{
		1310	SvREFCNT_dec_NN (tag_sv);
		1311	FREETMPS; LEAVE;
		1312	ERR_ERRSV;
		1313	}
		1314
		1315	if (count)
		1316	{
		1317	SvREFCNT_dec_NN (tag_sv);
		1318	SvREFCNT_dec_NN (sv);
		1319	sv = SvREFCNT_inc_NN (TOPs);
		1320	SP -= count;
		1321	}
		1322	else
		1323	{
761	AV *av = newAV ();	1324	AV *av = newAV ();
762	av_push (av, newSVuv (tag));	1325	av_push (av, tag_sv);
763	av_push (av, sv);	1326	av_push (av, sv);
764		1327
765	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	1328	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
766	? cbor_tagged_stash	1329	? cbor_tagged_stash
767	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1330	: gv_stashpv ("CBOR::XS::Tagged" , 1);
768
769	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);	1331	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1332	}
		1333
		1334	PUTBACK;
		1335
		1336	FREETMPS; LEAVE;
		1337	}
		1338	break;
770	}	1339	}
		1340
		1341	return sv;
771		1342
772	fail:	1343	fail:
773	SvREFCNT_dec (sv);	1344	SvREFCNT_dec (sv);
774	return &PL_sv_undef;	1345	return &PL_sv_undef;
775	}	1346	}
…		…
777	static SV *	1348	static SV *
778	decode_sv (dec_t *dec)	1349	decode_sv (dec_t *dec)
779	{	1350	{
780	WANT (1);	1351	WANT (1);
781		1352
782	switch (*dec->cur >> 5)	1353	switch (*dec->cur >> MAJOR_SHIFT)
783	{	1354	{
784	case 0: // unsigned int	1355	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
785	return newSVuv (decode_uint (dec));	1356	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
786	case 1: // negative int	1357	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
787	return newSViv (-1 - (IV)decode_uint (dec));	1358	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
788	case 2: // octet string	1359	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
789	return decode_str (dec, 0);	1360	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
790	case 3: // utf-8 string	1361	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
791	return decode_str (dec, 1);	1362
792	case 4: // array	1363	case MAJOR_MISC >> MAJOR_SHIFT:
793	return decode_av (dec);
794	case 5: // map
795	return decode_hv (dec);
796	case 6: // tag
797	return decode_tagged (dec);
798	case 7: // misc
799	switch (*dec->cur++ & 31)	1364	switch (*dec->cur++ & MINOR_MASK)
800	{	1365	{
801	case 20:	1366	case SIMPLE_FALSE:
802	#if CBOR_SLOW	1367	#if CBOR_SLOW
803	types_false = get_bool ("Types::Serialiser::false");	1368	types_false = get_bool ("Types::Serialiser::false");
804	#endif	1369	#endif
805	return newSVsv (types_false);	1370	return newSVsv (types_false);
806	case 21:	1371	case SIMPLE_TRUE:
807	#if CBOR_SLOW	1372	#if CBOR_SLOW
808	types_true = get_bool ("Types::Serialiser::true");	1373	types_true = get_bool ("Types::Serialiser::true");
809	#endif	1374	#endif
810	return newSVsv (types_true);	1375	return newSVsv (types_true);
811	case 22:	1376	case SIMPLE_NULL:
812	return newSVsv (&PL_sv_undef);	1377	return newSVsv (&PL_sv_undef);
813	case 23:	1378	case SIMPLE_UNDEF:
814	#if CBOR_SLOW	1379	#if CBOR_SLOW
815	types_error = get_bool ("Types::Serialiser::error");	1380	types_error = get_bool ("Types::Serialiser::error");
816	#endif	1381	#endif
817	return newSVsv (types_error);	1382	return newSVsv (types_error);
818		1383
819	case 25:	1384	case MISC_FLOAT16:
820	{	1385	{
821	WANT (2);	1386	WANT (2);
822		1387
823	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1388	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
824	dec->cur += 2;	1389	dec->cur += 2;
825		1390
826	return newSVnv (ecb_binary16_to_float (fp));	1391	return newSVnv (ecb_binary16_to_float (fp));
827	}	1392	}
828		1393
829	case 26:	1394	case MISC_FLOAT32:
830	{	1395	{
831	uint32_t fp;	1396	uint32_t fp;
832	WANT (4);	1397	WANT (4);
833	memcpy (&fp, dec->cur, 4);	1398	memcpy (&fp, dec->cur, 4);
834	dec->cur += 4;	1399	dec->cur += 4;
…		…
837	fp = ecb_bswap32 (fp);	1402	fp = ecb_bswap32 (fp);
838		1403
839	return newSVnv (ecb_binary32_to_float (fp));	1404	return newSVnv (ecb_binary32_to_float (fp));
840	}	1405	}
841		1406
842	case 27:	1407	case MISC_FLOAT64:
843	{	1408	{
844	uint64_t fp;	1409	uint64_t fp;
845	WANT (8);	1410	WANT (8);
846	memcpy (&fp, dec->cur, 8);	1411	memcpy (&fp, dec->cur, 8);
847	dec->cur += 8;	1412	dec->cur += 8;
…		…
850	fp = ecb_bswap64 (fp);	1415	fp = ecb_bswap64 (fp);
851		1416
852	return newSVnv (ecb_binary64_to_double (fp));	1417	return newSVnv (ecb_binary64_to_double (fp));
853	}	1418	}
854		1419
855	// 0..19 unassigned	1420	// 0..19 unassigned simple
856	// 24 reserved + unassigned (reserved values are not encodable)	1421	// 24 reserved + unassigned simple (reserved values are not encodable)
		1422	// 28-30 unassigned misc
		1423	// 31 break code
857	default:	1424	default:
858	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1425	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
859	}	1426	}
860		1427
861	break;	1428	break;
862	}	1429	}
863		1430
…		…
866	}	1433	}
867		1434
868	static SV *	1435	static SV *
869	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1436	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
870	{	1437	{
871	dec_t dec;	1438	dec_t dec = { 0 };
872	SV *sv;	1439	SV *sv;
873	STRLEN len;	1440	STRLEN len;
874	char *data = SvPVbyte (string, len);	1441	char *data = SvPVbyte (string, len);
875		1442
876	if (len > cbor->max_size && cbor->max_size)	1443	if (len > cbor->max_size && cbor->max_size)
…		…
878	(unsigned long)len, (unsigned long)cbor->max_size);	1445	(unsigned long)len, (unsigned long)cbor->max_size);
879		1446
880	dec.cbor = *cbor;	1447	dec.cbor = *cbor;
881	dec.cur = (U8 *)data;	1448	dec.cur = (U8 *)data;
882	dec.end = (U8 *)data + len;	1449	dec.end = (U8 *)data + len;
883	dec.err = 0;
884	dec.depth = 0;
885		1450
886	sv = decode_sv (&dec);	1451	sv = decode_sv (&dec);
887		1452
888	if (offset_return)	1453	if (offset_return)
889	*offset_return = dec.cur;	1454	*offset_return = dec.cur;
…		…
892	if (dec.cur != dec.end && !dec.err)	1457	if (dec.cur != dec.end && !dec.err)
893	dec.err = "garbage after CBOR object";	1458	dec.err = "garbage after CBOR object";
894		1459
895	if (dec.err)	1460	if (dec.err)
896	{	1461	{
		1462	if (dec.shareable)
		1463	{
		1464	// need to break cyclic links, which would all be in shareable
		1465	int i;
		1466	SV **svp;
		1467
		1468	for (i = av_len (dec.shareable) + 1; i--; )
		1469	if ((svp = av_fetch (dec.shareable, i, 0)))
		1470	sv_setsv (*svp, &PL_sv_undef);
		1471	}
		1472
897	SvREFCNT_dec (sv);	1473	SvREFCNT_dec_NN (sv);
		1474
		1475	if (dec.err_sv)
		1476	sv_2mortal (dec.err_sv);
		1477
898	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);	1478	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
899	}	1479	}
900		1480
901	sv = sv_2mortal (sv);	1481	sv = sv_2mortal (sv);
902		1482
903	return sv;	1483	return sv;
904	}	1484	}
905		1485
		1486	/////////////////////////////////////////////////////////////////////////////
		1487	// incremental parser
		1488
		1489	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1490
		1491	// returns 0 for notyet, 1 for success or error
		1492	static int
		1493	incr_parse (CBOR *self, SV *cborstr)
		1494	{
		1495	STRLEN cur;
		1496	SvPV (cborstr, cur);
		1497
		1498	while (ecb_expect_true (self->incr_need <= cur))
		1499	{
		1500	// table of integer count bytes
		1501	static I8 incr_len[MINOR_MASK + 1] = {
		1502	0, 0, 0, 0, 0, 0, 0, 0,
		1503	0, 0, 0, 0, 0, 0, 0, 0,
		1504	0, 0, 0, 0, 0, 0, 0, 0,
		1505	1, 2, 4, 8,-1,-1,-1,-2
		1506	};
		1507
		1508	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1509	U8 m = *p & MINOR_MASK;
		1510	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1511	I8 ilen = incr_len[m];
		1512
		1513	self->incr_need = self->incr_pos + 1;
		1514
		1515	if (ecb_expect_false (ilen < 0))
		1516	{
		1517	if (m != MINOR_INDEF)
		1518	return 1; // error
		1519
		1520	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1521	{
		1522	if (count >= 0)
		1523	return 1; // error
		1524
		1525	count = 1;
		1526	}
		1527	else
		1528	{
		1529	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1530	count = -1;
		1531	}
		1532	}
		1533	else
		1534	{
		1535	self->incr_need += ilen;
		1536	if (ecb_expect_false (self->incr_need > cur))
		1537	return 0;
		1538
		1539	int major = *p >> MAJOR_SHIFT;
		1540
		1541	switch (major)
		1542	{
		1543	case MAJOR_TAG >> MAJOR_SHIFT:
		1544	++count; // tags merely prefix another value
		1545	break;
		1546
		1547	case MAJOR_BYTES >> MAJOR_SHIFT:
		1548	case MAJOR_TEXT >> MAJOR_SHIFT:
		1549	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1550	case MAJOR_MAP >> MAJOR_SHIFT:
		1551	{
		1552	UV len;
		1553
		1554	if (ecb_expect_false (ilen))
		1555	{
		1556	len = 0;
		1557
		1558	do {
		1559	len = (len << 8) | *++p;
		1560	} while (--ilen);
		1561	}
		1562	else
		1563	len = m;
		1564
		1565	switch (major)
		1566	{
		1567	case MAJOR_BYTES >> MAJOR_SHIFT:
		1568	case MAJOR_TEXT >> MAJOR_SHIFT:
		1569	self->incr_need += len;
		1570	if (ecb_expect_false (self->incr_need > cur))
		1571	return 0;
		1572
		1573	break;
		1574
		1575	case MAJOR_MAP >> MAJOR_SHIFT:
		1576	len <<= 1;
		1577	/* FALLTHROUGH */
		1578	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1579	if (len)
		1580	{
		1581	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1582	count = len + 1;
		1583	}
		1584	break;
		1585	}
		1586	}
		1587	}
		1588	}
		1589
		1590	self->incr_pos = self->incr_need;
		1591
		1592	if (count > 0)
		1593	{
		1594	while (!--count)
		1595	{
		1596	if (!AvFILLp (self->incr_count))
		1597	return 1; // done
		1598
		1599	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1600	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1601	}
		1602
		1603	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1604	}
		1605	}
		1606
		1607	return 0;
		1608	}
		1609
		1610
906	/////////////////////////////////////////////////////////////////////////////	1611	/////////////////////////////////////////////////////////////////////////////
907	// XS interface functions	1612	// XS interface functions
908		1613
909	MODULE = CBOR::XS PACKAGE = CBOR::XS	1614	MODULE = CBOR::XS PACKAGE = CBOR::XS
910		1615
…		…
918		1623
919	types_true = get_bool ("Types::Serialiser::true" );	1624	types_true = get_bool ("Types::Serialiser::true" );
920	types_false = get_bool ("Types::Serialiser::false");	1625	types_false = get_bool ("Types::Serialiser::false");
921	types_error = get_bool ("Types::Serialiser::error");	1626	types_error = get_bool ("Types::Serialiser::error");
922		1627
		1628	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1629
923	sv_cbor = newSVpv ("CBOR", 0);	1630	sv_cbor = newSVpv ("CBOR", 0);
924	SvREADONLY_on (sv_cbor);	1631	SvREADONLY_on (sv_cbor);
		1632
		1633	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
925	}	1634	}
926		1635
927	PROTOTYPES: DISABLE	1636	PROTOTYPES: DISABLE
928		1637
929	void CLONE (...)	1638	void CLONE (...)
…		…
947		1656
948	void shrink (CBOR *self, int enable = 1)	1657	void shrink (CBOR *self, int enable = 1)
949	ALIAS:	1658	ALIAS:
950	shrink = F_SHRINK	1659	shrink = F_SHRINK
951	allow_unknown = F_ALLOW_UNKNOWN	1660	allow_unknown = F_ALLOW_UNKNOWN
		1661	allow_sharing = F_ALLOW_SHARING
		1662	allow_cycles = F_ALLOW_CYCLES
		1663	forbid_objects = F_FORBID_OBJECTS
		1664	pack_strings = F_PACK_STRINGS
		1665	text_keys = F_TEXT_KEYS
		1666	text_strings = F_TEXT_STRINGS
		1667	validate_utf8 = F_VALIDATE_UTF8
952	PPCODE:	1668	PPCODE:
953	{	1669	{
954	if (enable)	1670	if (enable)
955	self->flags |= ix;	1671	self->flags |= ix;
956	else	1672	else
…		…
961		1677
962	void get_shrink (CBOR *self)	1678	void get_shrink (CBOR *self)
963	ALIAS:	1679	ALIAS:
964	get_shrink = F_SHRINK	1680	get_shrink = F_SHRINK
965	get_allow_unknown = F_ALLOW_UNKNOWN	1681	get_allow_unknown = F_ALLOW_UNKNOWN
		1682	get_allow_sharing = F_ALLOW_SHARING
		1683	get_allow_cycles = F_ALLOW_CYCLES
		1684	get_forbid_objects = F_FORBID_OBJECTS
		1685	get_pack_strings = F_PACK_STRINGS
		1686	get_text_keys = F_TEXT_KEYS
		1687	get_text_strings = F_TEXT_STRINGS
		1688	get_validate_utf8 = F_VALIDATE_UTF8
966	PPCODE:	1689	PPCODE:
967	XPUSHs (boolSV (self->flags & ix));	1690	XPUSHs (boolSV (self->flags & ix));
968		1691
969	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1692	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
970	PPCODE:	1693	PPCODE:
…		…
983	XPUSHs (ST (0));	1706	XPUSHs (ST (0));
984		1707
985	int get_max_size (CBOR *self)	1708	int get_max_size (CBOR *self)
986	CODE:	1709	CODE:
987	RETVAL = self->max_size;	1710	RETVAL = self->max_size;
		1711	OUTPUT:
		1712	RETVAL
		1713
		1714	void filter (CBOR *self, SV *filter = 0)
		1715	PPCODE:
		1716	SvREFCNT_dec (self->filter);
		1717	self->filter = filter ? newSVsv (filter) : filter;
		1718	XPUSHs (ST (0));
		1719
		1720	SV *get_filter (CBOR *self)
		1721	CODE:
		1722	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
988	OUTPUT:	1723	OUTPUT:
989	RETVAL	1724	RETVAL
990		1725
991	void encode (CBOR *self, SV *scalar)	1726	void encode (CBOR *self, SV *scalar)
992	PPCODE:	1727	PPCODE:
…		…
1007	EXTEND (SP, 2);	1742	EXTEND (SP, 2);
1008	PUSHs (sv);	1743	PUSHs (sv);
1009	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1744	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1010	}	1745	}
1011		1746
		1747	void incr_parse (CBOR *self, SV *cborstr)
		1748	ALIAS:
		1749	incr_parse_multiple = 1
		1750	PPCODE:
		1751	{
		1752	if (SvUTF8 (cborstr))
		1753	sv_utf8_downgrade (cborstr, 0);
		1754
		1755	if (!self->incr_count)
		1756	{
		1757	self->incr_count = newAV ();
		1758	self->incr_pos = 0;
		1759	self->incr_need = 1;
		1760
		1761	av_push (self->incr_count, newSViv (1));
		1762	}
		1763
		1764	do
		1765	{
		1766	if (!incr_parse (self, cborstr))
		1767	{
		1768	if (self->incr_need > self->max_size && self->max_size)
		1769	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1770	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1771
		1772	break;
		1773	}
		1774
		1775	SV *sv;
		1776	char *offset;
		1777
		1778	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1779	XPUSHs (sv);
		1780
		1781	sv_chop (cborstr, offset);
		1782
		1783	av_clear (self->incr_count);
		1784	av_push (self->incr_count, newSViv (1));
		1785
		1786	self->incr_pos = 0;
		1787	self->incr_need = self->incr_pos + 1;
		1788	}
		1789	while (ix);
		1790	}
		1791
		1792	void incr_reset (CBOR *self)
		1793	CODE:
		1794	{
		1795	SvREFCNT_dec (self->incr_count);
		1796	self->incr_count = 0;
		1797	}
		1798
		1799	void DESTROY (CBOR *self)
		1800	PPCODE:
		1801	cbor_free (self);
		1802
1012	PROTOTYPES: ENABLE	1803	PROTOTYPES: ENABLE
1013		1804
1014	void encode_cbor (SV *scalar)	1805	void encode_cbor (SV *scalar)
		1806	ALIAS:
		1807	encode_cbor = 0
		1808	encode_cbor_sharing = F_ALLOW_SHARING
1015	PPCODE:	1809	PPCODE:
1016	{	1810	{
1017	CBOR cbor;	1811	CBOR cbor;
1018	cbor_init (&cbor);	1812	cbor_init (&cbor);
		1813	cbor.flags |= ix;
1019	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1814	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1020	XPUSHs (scalar);	1815	XPUSHs (scalar);
1021	}	1816	}
1022		1817
1023	void decode_cbor (SV *cborstr)	1818	void decode_cbor (SV *cborstr)
…		…
1027	cbor_init (&cbor);	1822	cbor_init (&cbor);
1028	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1823	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1029	XPUSHs (cborstr);	1824	XPUSHs (cborstr);
1030	}	1825	}
1031		1826
		1827	#ifdef __AFL_COMPILER
		1828
		1829	void
		1830	afl_init ()
		1831	CODE:
		1832	__AFL_INIT ();
		1833
		1834	int
		1835	afl_loop (unsigned int count = 10000)
		1836	CODE:
		1837	RETVAL = __AFL_LOOP (count);
		1838	OUTPUT:
		1839	RETVAL
		1840
		1841	#endif
		1842

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