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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.12 by root, Mon Oct 28 19:06:45 2013 UTC vs.
Revision 1.71 by root, Fri Mar 19 17:30:27 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"
		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	// known major and minor types
		34	enum cbor_type
		35	{
		36	MAJOR_SHIFT = 5,
		37	MINOR_MASK = 0x1f,
		38
		39	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		40	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		41	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		42	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		43	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		44	MAJOR_MAP = 5 << MAJOR_SHIFT,
		45	MAJOR_TAG = 6 << MAJOR_SHIFT,
		46	MAJOR_MISC = 7 << MAJOR_SHIFT,
		47
		48	// INT/STRING/ARRAY/MAP subtypes
		49	LENGTH_EXT1 = 24,
		50	LENGTH_EXT2 = 25,
		51	LENGTH_EXT4 = 26,
		52	LENGTH_EXT8 = 27,
		53
		54	// SIMPLE types (effectively MISC subtypes)
		55	SIMPLE_FALSE = 20,
		56	SIMPLE_TRUE = 21,
		57	SIMPLE_NULL = 22,
		58	SIMPLE_UNDEF = 23,
		59
		60	// MISC subtype (unused)
		61	MISC_EXT1 = 24,
		62	MISC_FLOAT16 = 25,
		63	MISC_FLOAT32 = 26,
		64	MISC_FLOAT64 = 27,
		65
		66	// BYTES/TEXT/ARRAY/MAP
		67	MINOR_INDEF = 31,
		68	};
13		69
14	// known tags	70	// known tags
15	enum cbor_tag	71	enum cbor_tag
16	{	72	{
17	// inofficial extensions (pending iana registration)	73	// extensions
18	CBOR_TAG_PERL_OBJECT = 256,	74	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
19	CBOR_TAG_GENERIC_OBJECT = 257,	75	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
		76	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
		77	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
		78	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
		79	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
		80	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
20		81
21	// rfc7049	82	// rfc7049
22	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	83	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
23	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	84	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
24	CBOR_TAG_POS_BIGNUM = 2, // byte string	85	CBOR_TAG_POS_BIGNUM = 2, // byte string
25	CBOR_TAG_NEG_BIGNUM = 3, // byte string	86	CBOR_TAG_NEG_BIGNUM = 3, // byte string
26	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	87	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
27	CBOR_TAG_BIGFLOAT = 5, // array	88	CBOR_TAG_BIGFLOAT = 5, // array
28		89
29	CBOR_TAG_CONV_B64U = 21, // base64url, any	90	CBOR_TAG_CONV_B64U = 21, // base64url, any
30	CBOR_TAG_CONV_B64 = 22, // base64, any	91	CBOR_TAG_CONV_B64 = 22, // base64, any
31	CBOR_TAG_CONV_HEX = 23, // base16, any	92	CBOR_TAG_CONV_HEX = 23, // base16, any
32	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	93	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
33		94
34	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	95	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
35	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	96	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
36	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	97	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
37	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	98	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
38	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	99	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
39		100
40	CBOR_TAG_MAGIC = 55799 // self-describe cbor	101	CBOR_TAG_MAGIC = 55799, // self-describe cbor
41	};	102	};
42		103
		104	// known forced types, also hardcoded in CBOR.pm
		105	enum
		106	{
		107	AS_CBOR = 0,
		108	AS_INT = 1,
		109	AS_BYTES = 2,
		110	AS_TEXT = 3,
		111	AS_FLOAT16 = 4,
		112	AS_FLOAT32 = 5,
		113	AS_FLOAT64 = 6,
		114	AS_MAP = 7,
		115	// possibly future enhancements: (generic) float, (generic) string
		116	};
		117
43	#define F_SHRINK 0x00000200UL	118	#define F_SHRINK 0x00000001UL
44	#define F_ALLOW_UNKNOWN 0x00002000UL	119	#define F_ALLOW_UNKNOWN 0x00000002UL
		120	#define F_ALLOW_SHARING 0x00000004UL
		121	#define F_ALLOW_CYCLES 0x00000008UL
		122	#define F_FORBID_OBJECTS 0x00000010UL
		123	#define F_PACK_STRINGS 0x00000020UL
		124	#define F_TEXT_KEYS 0x00000040UL
		125	#define F_TEXT_STRINGS 0x00000080UL
		126	#define F_VALIDATE_UTF8 0x00000100UL
45		127
46	#define INIT_SIZE 32 // initial scalar size to be allocated	128	#define INIT_SIZE 32 // initial scalar size to be allocated
47		129
48	#define SB do {	130	#define SB do {
49	#define SE } while (0)	131	#define SE } while (0)
…		…
61	# define CBOR_SLOW 0	143	# define CBOR_SLOW 0
62	# define CBOR_STASH cbor_stash	144	# define CBOR_STASH cbor_stash
63	#endif	145	#endif
64		146
65	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::	147	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;	148	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
67		149
68	typedef struct {	150	typedef struct {
69	U32 flags;	151	U32 flags;
70	U32 max_depth;	152	U32 max_depth;
71	STRLEN max_size;	153	STRLEN max_size;
		154	SV *filter;
		155
		156	// for the incremental parser
		157	STRLEN incr_pos; // the current offset into the text
		158	STRLEN incr_need; // minimum bytes needed to decode
		159	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
72	} CBOR;	160	} CBOR;
73		161
74	ecb_inline void	162	ecb_inline void
75	cbor_init (CBOR *cbor)	163	cbor_init (CBOR *cbor)
76	{	164	{
77	Zero (cbor, 1, CBOR);	165	Zero (cbor, 1, CBOR);
78	cbor->max_depth = 512;	166	cbor->max_depth = 512;
		167	}
		168
		169	ecb_inline void
		170	cbor_free (CBOR *cbor)
		171	{
		172	SvREFCNT_dec (cbor->filter);
		173	SvREFCNT_dec (cbor->incr_count);
79	}	174	}
80		175
81	/////////////////////////////////////////////////////////////////////////////	176	/////////////////////////////////////////////////////////////////////////////
82	// utility functions	177	// utility functions
83		178
…		…
105	SvPV_renew (sv, SvCUR (sv) + 1);	200	SvPV_renew (sv, SvCUR (sv) + 1);
106	#endif	201	#endif
107	}	202	}
108	}	203	}
109		204
110	/////////////////////////////////////////////////////////////////////////////	205	// minimum length of a string to be registered for stringref
111	// fp hell	206	ecb_inline STRLEN
112		207	minimum_string_length (UV idx)
113	//TODO	208	{
		209	return idx <= 23 ? 3
		210	: idx <= 0xffU ? 4
		211	: idx <= 0xffffU ? 5
		212	: idx <= 0xffffffffU ? 7
		213	: 11;
		214	}
114		215
115	/////////////////////////////////////////////////////////////////////////////	216	/////////////////////////////////////////////////////////////////////////////
116	// encoder	217	// encoder
117		218
118	// structure used for encoding CBOR	219	// structure used for encoding CBOR
…		…
121	char *cur; // SvPVX (sv) + current output position	222	char *cur; // SvPVX (sv) + current output position
122	char *end; // SvEND (sv)	223	char *end; // SvEND (sv)
123	SV *sv; // result scalar	224	SV *sv; // result scalar
124	CBOR cbor;	225	CBOR cbor;
125	U32 depth; // recursion level	226	U32 depth; // recursion level
		227	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		228	UV stringref_idx;
		229	HV *shareable; // ptr => index, or 0
		230	UV shareable_idx;
126	} enc_t;	231	} enc_t;
127		232
128	ecb_inline void	233	ecb_inline void
129	need (enc_t *enc, STRLEN len)	234	need (enc_t *enc, STRLEN len)
130	{	235	{
131	if (ecb_expect_false (enc->cur + len >= enc->end))	236	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
132	{	237	{
133	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	238	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
134	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	239	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
135	enc->cur = SvPVX (enc->sv) + cur;	240	enc->cur = SvPVX (enc->sv) + cur;
136	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	241	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
137	}	242	}
138	}	243	}
139		244
		245	static void encode_sv (enc_t *enc, SV *sv);
		246
140	ecb_inline void	247	ecb_inline void
141	encode_ch (enc_t *enc, char ch)	248	encode_ch (enc_t *enc, char ch)
142	{	249	{
143	need (enc, 1);	250	need (enc, 1);
144	*enc->cur++ = ch;	251	*enc->cur++ = ch;
145	}	252	}
146		253
		254	// used for tags, intregers, element counts and so on
147	static void	255	static void
148	encode_uint (enc_t *enc, int major, UV len)	256	encode_uint (enc_t *enc, int major, UV len)
149	{	257	{
150	need (enc, 9);	258	need (enc, 9);
151		259
152	if (len < 24)	260	if (ecb_expect_true (len < LENGTH_EXT1))
153	*enc->cur++ = major | len;	261	*enc->cur++ = major | len;
154	else if (len <= 0xff)	262	else if (ecb_expect_true (len <= 0xffU))
155	{	263	{
156	*enc->cur++ = major | 24;	264	*enc->cur++ = major | LENGTH_EXT1;
157	*enc->cur++ = len;	265	*enc->cur++ = len;
158	}	266	}
159	else if (len <= 0xffff)	267	else if (len <= 0xffffU)
160	{	268	{
161	*enc->cur++ = major | 25;	269	*enc->cur++ = major | LENGTH_EXT2;
162	*enc->cur++ = len >> 8;	270	*enc->cur++ = len >> 8;
163	*enc->cur++ = len;	271	*enc->cur++ = len;
164	}	272	}
165	else if (len <= 0xffffffff)	273	else if (len <= 0xffffffffU)
166	{	274	{
167	*enc->cur++ = major | 26;	275	*enc->cur++ = major | LENGTH_EXT4;
168	*enc->cur++ = len >> 24;	276	*enc->cur++ = len >> 24;
169	*enc->cur++ = len >> 16;	277	*enc->cur++ = len >> 16;
170	*enc->cur++ = len >> 8;	278	*enc->cur++ = len >> 8;
171	*enc->cur++ = len;	279	*enc->cur++ = len;
172	}	280	}
173	else	281	else
174	{	282	{
175	*enc->cur++ = major | 27;	283	*enc->cur++ = major | LENGTH_EXT8;
176	*enc->cur++ = len >> 56;	284	*enc->cur++ = len >> 56;
177	*enc->cur++ = len >> 48;	285	*enc->cur++ = len >> 48;
178	*enc->cur++ = len >> 40;	286	*enc->cur++ = len >> 40;
179	*enc->cur++ = len >> 32;	287	*enc->cur++ = len >> 32;
180	*enc->cur++ = len >> 24;	288	*enc->cur++ = len >> 24;
…		…
182	*enc->cur++ = len >> 8;	290	*enc->cur++ = len >> 8;
183	*enc->cur++ = len;	291	*enc->cur++ = len;
184	}	292	}
185	}	293	}
186		294
187	static void	295	// encodes a perl value into a CBOR integer
		296	ecb_inline void
		297	encode_int (enc_t *enc, SV *sv)
		298	{
		299	if (SvIsUV (sv))
		300	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
		301	else if (SvIVX (sv) >= 0)
		302	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
		303	else
		304	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
		305	}
		306
		307	ecb_inline void
		308	encode_tag (enc_t *enc, UV tag)
		309	{
		310	encode_uint (enc, MAJOR_TAG, tag);
		311	}
		312
		313	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		314	ecb_noinline static void
188	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	315	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
189	{	316	{
190	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	317	STRLEN ulen = len;
		318	U8 *p, *pend = (U8 *)str + len;
		319
		320	for (p = (U8 *)str; p < pend; ++p)
		321	ulen += *p >> 7; // count set high bits
		322
		323	encode_uint (enc, MAJOR_TEXT, ulen);
		324
		325	need (enc, ulen);
		326	for (p = (U8 *)str; p < pend; ++p)
		327	if (*p < 0x80)
		328	*enc->cur++ = *p;
		329	else
		330	{
		331	*enc->cur++ = 0xc0 + (*p >> 6);
		332	*enc->cur++ = 0x80 + (*p & 63);
		333	}
		334	}
		335
		336	ecb_inline void
		337	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		338	{
		339	if (ecb_expect_false (upgrade_utf8))
		340	if (!utf8)
		341	{
		342	encode_str_utf8 (enc, utf8, str, len);
		343	return;
		344	}
		345
		346	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
191	need (enc, len);	347	need (enc, len);
192	memcpy (enc->cur, str, len);	348	memcpy (enc->cur, str, len);
193	enc->cur += len;	349	enc->cur += len;
194	}	350	}
195		351
196	static void encode_sv (enc_t *enc, SV *sv);	352	ecb_inline void
		353	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		354	{
		355	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		356	{
		357	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		358
		359	if (SvOK (*svp))
		360	{
		361	// already registered, use stringref
		362	encode_tag (enc, CBOR_TAG_STRINGREF);
		363	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		364	return;
		365	}
		366	else if (len >= minimum_string_length (enc->stringref_idx))
		367	{
		368	// register only
		369	sv_setuv (*svp, enc->stringref_idx);
		370	++enc->stringref_idx;
		371	}
		372	}
		373
		374	encode_str (enc, upgrade_utf8, utf8, str, len);
		375	}
		376
		377	ecb_inline void
		378	encode_float16 (enc_t *enc, NV nv)
		379	{
		380	need (enc, 1+2);
		381
		382	*enc->cur++ = MAJOR_MISC | MISC_FLOAT16;
		383
		384	uint16_t fp = ecb_float_to_binary16 (nv);
		385
		386	if (!ecb_big_endian ())
		387	fp = ecb_bswap16 (fp);
		388
		389	memcpy (enc->cur, &fp, 2);
		390	enc->cur += 2;
		391	}
		392
		393	ecb_inline void
		394	encode_float32 (enc_t *enc, NV nv)
		395	{
		396	need (enc, 1+4);
		397
		398	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
		399
		400	uint32_t fp = ecb_float_to_binary32 (nv);
		401
		402	if (!ecb_big_endian ())
		403	fp = ecb_bswap32 (fp);
		404
		405	memcpy (enc->cur, &fp, 4);
		406	enc->cur += 4;
		407	}
		408
		409	ecb_inline void
		410	encode_float64 (enc_t *enc, NV nv)
		411	{
		412	need (enc, 1+8);
		413
		414	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
		415
		416	uint64_t fp = ecb_double_to_binary64 (nv);
		417
		418	if (!ecb_big_endian ())
		419	fp = ecb_bswap64 (fp);
		420
		421	memcpy (enc->cur, &fp, 8);
		422	enc->cur += 8;
		423	}
		424
		425	ecb_inline void
		426	encode_bool (enc_t *enc, int istrue)
		427	{
		428	encode_ch (enc, istrue ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		429	}
		430
		431	// encodes an arrayref containing key-value pairs as CBOR map
		432	ecb_inline void
		433	encode_array_as_map (enc_t *enc, SV *sv)
		434	{
		435	if (enc->depth >= enc->cbor.max_depth)
		436	croak (ERR_NESTING_EXCEEDED);
		437
		438	++enc->depth;
		439
		440	// as_map does error checking for us, but we re-check in case
		441	// things have changed.
		442
		443	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		444	croak ("CBOR::XS::as_map requires an array reference (did you change the array after calling as_map?)");
		445
		446	AV *av = (AV *)SvRV (sv);
		447	int i, len = av_len (av);
		448
		449	if (!(len & 1))
		450	croak ("CBOR::XS::as_map requires an even number of elements (did you change the array after calling as_map?)");
		451
		452	encode_uint (enc, MAJOR_MAP, (len + 1) >> 1);
		453
		454	for (i = 0; i <= len; ++i)
		455	{
		456	SV **svp = av_fetch (av, i, 0);
		457	encode_sv (enc, svp ? *svp : &PL_sv_undef);
		458	}
		459
		460	--enc->depth;
		461	}
		462
		463	ecb_inline void
		464	encode_forced (enc_t *enc, UV type, SV *sv)
		465	{
		466	switch (type)
		467	{
		468	case AS_CBOR:
		469	{
		470	STRLEN len;
		471	char *str = SvPVbyte (sv, len);
		472
		473	need (enc, len);
		474	memcpy (enc->cur, str, len);
		475	enc->cur += len;
		476	}
		477	break;
		478
		479	case AS_BYTES:
		480	{
		481	STRLEN len;
		482	char *str = SvPVbyte (sv, len);
		483	encode_strref (enc, 0, 0, str, len);
		484	}
		485	break;
		486
		487	case AS_TEXT:
		488	{
		489	STRLEN len;
		490	char *str = SvPVutf8 (sv, len);
		491	encode_strref (enc, 1, 1, str, len);
		492	}
		493	break;
		494
		495	case AS_INT: encode_int (enc, sv); break;
		496
		497	case AS_FLOAT16: encode_float16 (enc, SvNV (sv)); break;
		498	case AS_FLOAT32: encode_float32 (enc, SvNV (sv)); break;
		499	case AS_FLOAT64: encode_float64 (enc, SvNV (sv)); break;
		500
		501	case AS_MAP: encode_array_as_map (enc, sv); break;
		502
		503	default:
		504	croak ("encountered malformed CBOR::XS::Tagged object");
		505	}
		506	}
197		507
198	static void	508	static void
199	encode_av (enc_t *enc, AV *av)	509	encode_av (enc_t *enc, AV *av)
200	{	510	{
201	int i, len = av_len (av);	511	int i, len = av_len (av);
…		…
203	if (enc->depth >= enc->cbor.max_depth)	513	if (enc->depth >= enc->cbor.max_depth)
204	croak (ERR_NESTING_EXCEEDED);	514	croak (ERR_NESTING_EXCEEDED);
205		515
206	++enc->depth;	516	++enc->depth;
207		517
208	encode_uint (enc, 0x80, len + 1);	518	encode_uint (enc, MAJOR_ARRAY, len + 1);
209		519
		520	if (ecb_expect_false (SvMAGICAL (av)))
210	for (i = 0; i <= len; ++i)	521	for (i = 0; i <= len; ++i)
211	{	522	{
212	SV **svp = av_fetch (av, i, 0);	523	SV **svp = av_fetch (av, i, 0);
213	encode_sv (enc, svp ? *svp : &PL_sv_undef);	524	encode_sv (enc, svp ? *svp : &PL_sv_undef);
214	}	525	}
		526	else
		527	for (i = 0; i <= len; ++i)
		528	{
		529	SV *sv = AvARRAY (av)[i];
		530	encode_sv (enc, sv ? sv : &PL_sv_undef);
		531	}
215		532
216	--enc->depth;	533	--enc->depth;
217	}	534	}
218		535
219	static void	536	static void
…		…
227	++enc->depth;	544	++enc->depth;
228		545
229	int pairs = hv_iterinit (hv);	546	int pairs = hv_iterinit (hv);
230	int mg = SvMAGICAL (hv);	547	int mg = SvMAGICAL (hv);
231		548
232	if (mg)	549	if (ecb_expect_false (mg))
233	encode_ch (enc, 0xa0 | 31);	550	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
234	else	551	else
235	encode_uint (enc, 0xa0, pairs);	552	encode_uint (enc, MAJOR_MAP, pairs);
236		553
237	while ((he = hv_iternext (hv)))	554	while ((he = hv_iternext (hv)))
238	{	555	{
239	if (HeKLEN (he) == HEf_SVKEY)	556	if (HeKLEN (he) == HEf_SVKEY)
240	encode_sv (enc, HeSVKEY (he));	557	encode_sv (enc, HeSVKEY (he));
241	else	558	else
242	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	559	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
243		560
244	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	561	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
245	}	562	}
246		563
247	if (mg)	564	if (ecb_expect_false (mg))
248	encode_ch (enc, 0xe0 | 31);	565	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
249		566
250	--enc->depth;	567	--enc->depth;
251	}	568	}
252		569
253	// encode objects, arrays and special \0=false and \1=true values.	570	// encode objects, arrays and special \0=false and \1=true values.
254	static void	571	static void
255	encode_rv (enc_t *enc, SV *sv)	572	encode_rv (enc_t *enc, SV *sv)
256	{	573	{
257	svtype svt;
258
259	SvGETMAGIC (sv);	574	SvGETMAGIC (sv);
		575
260	svt = SvTYPE (sv);	576	svtype svt = SvTYPE (sv);
261		577
262	if (ecb_expect_false (SvOBJECT (sv)))	578	if (ecb_expect_false (SvOBJECT (sv)))
263	{	579	{
264	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash	580	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
265	? types_boolean_stash	581	? types_boolean_stash
…		…
270	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	586	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
271	? cbor_tagged_stash	587	? cbor_tagged_stash
272	: gv_stashpv ("CBOR::XS::Tagged" , 1);	588	: gv_stashpv ("CBOR::XS::Tagged" , 1);
273		589
274	HV *stash = SvSTASH (sv);	590	HV *stash = SvSTASH (sv);
275	GV *method;
276		591
277	if (stash == boolean_stash)	592	if (stash == boolean_stash)
278	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	593	{
		594	encode_bool (enc, SvIV (sv));
		595	return;
		596	}
279	else if (stash == error_stash)	597	else if (stash == error_stash)
280	encode_ch (enc, 0xe0 | 23);	598	{
		599	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		600	return;
		601	}
281	else if (stash == tagged_stash)	602	else if (stash == tagged_stash)
282	{	603	{
283	if (svt != SVt_PVAV)	604	if (svt != SVt_PVAV)
284	croak ("encountered CBOR::XS::Tagged object that isn't an array");	605	croak ("encountered CBOR::XS::Tagged object that isn't an array");
285		606
		607	switch (av_len ((AV *)sv))
		608	{
		609	case 2-1:
		610	// actually a tagged value
286	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	611	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
287	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));	612	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		613	break;
		614
		615	case 3-1:
		616	// a forced type [value, type, undef]
		617	encode_forced (enc, SvUV (*av_fetch ((AV *)sv, 1, 1)), *av_fetch ((AV *)sv, 0, 1));
		618	break;
		619
		620	default:
		621	croak ("encountered malformed CBOR::XS::Tagged object");
		622	}
		623
		624	return;
		625	}
		626	}
		627
		628	if (ecb_expect_false (SvREFCNT (sv) > 1)
		629	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		630	{
		631	if (ecb_expect_false (!enc->shareable))
		632	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		633
		634	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		635
		636	if (SvOK (*svp))
288	}	637	{
		638	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		639	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		640	return;
		641	}
		642	else
		643	{
		644	sv_setuv (*svp, enc->shareable_idx);
		645	++enc->shareable_idx;
		646	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		647	}
		648	}
		649
		650	if (ecb_expect_false (SvOBJECT (sv)))
		651	{
		652	HV *stash = SvSTASH (sv);
		653	GV *method;
		654
		655	if (enc->cbor.flags & F_FORBID_OBJECTS)
		656	croak ("encountered object '%s', but forbid_objects is enabled",
		657	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
289	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))	658	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
290	{	659	{
291	dSP;	660	dSP;
292		661
293	ENTER; SAVETMPS; PUSHMARK (SP);	662	ENTER; SAVETMPS;
		663	PUSHMARK (SP);
294	// we re-bless the reference to get overload and other niceties right	664	// we re-bless the reference to get overload and other niceties right
295	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	665	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
296		666
297	PUTBACK;	667	PUTBACK;
298	// G_SCALAR ensures that return value is 1	668	// G_SCALAR ensures that return value is 1
…		…
311	}	681	}
312	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)	682	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
313	{	683	{
314	dSP;	684	dSP;
315		685
316	ENTER; SAVETMPS; PUSHMARK (SP);	686	ENTER; SAVETMPS;
		687	PUSHMARK (SP);
317	EXTEND (SP, 2);	688	EXTEND (SP, 2);
318	// we re-bless the reference to get overload and other niceties right	689	// we re-bless the reference to get overload and other niceties right
319	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	690	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
320	PUSHs (sv_cbor);	691	PUSHs (sv_cbor);
321		692
…		…
325		696
326	// catch this surprisingly common error	697	// catch this surprisingly common error
327	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)	698	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));	699	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
329		700
330	encode_uint (enc, 0xc0, CBOR_TAG_PERL_OBJECT);	701	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
331	encode_uint (enc, 0x80, count + 1);	702	encode_uint (enc, MAJOR_ARRAY, count + 1);
332	encode_str (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));	703	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
333		704
334	while (count)	705	{
		706	int i;
		707
		708	for (i = 0; i < count; ++i)
335	encode_sv (enc, SP[1 - count--]);	709	encode_sv (enc, SP[i + 1 - count]);
		710
		711	SP -= count;
		712	}
336		713
337	PUTBACK;	714	PUTBACK;
338		715
339	FREETMPS; LEAVE;	716	FREETMPS; LEAVE;
340	}	717	}
…		…
344	}	721	}
345	else if (svt == SVt_PVHV)	722	else if (svt == SVt_PVHV)
346	encode_hv (enc, (HV *)sv);	723	encode_hv (enc, (HV *)sv);
347	else if (svt == SVt_PVAV)	724	else if (svt == SVt_PVAV)
348	encode_av (enc, (AV *)sv);	725	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	726	else
367	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	727	{
368	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	728	encode_tag (enc, CBOR_TAG_INDIRECTION);
		729	encode_sv (enc, sv);
		730	}
369	}	731	}
370		732
371	static void	733	static void
372	encode_nv (enc_t *enc, SV *sv)	734	encode_nv (enc_t *enc, SV *sv)
373	{	735	{
374	double nv = SvNVX (sv);	736	double nv = SvNVX (sv);
375		737
376	need (enc, 9);	738	need (enc, 9);
377		739
378	if (ecb_expect_false (nv == (U32)nv))	740	if (ecb_expect_false (nv == (NV)(U32)nv))
379	encode_uint (enc, 0x00, (U32)nv);	741	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
380	//TODO: maybe I32?	742	//TODO: maybe I32?
381	else if (ecb_expect_false (nv == (float)nv))	743	else if (ecb_expect_false (nv == (float)nv))
382	{	744	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	745	else
394	{	746	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	}	747	}
406		748
407	static void	749	static void
408	encode_sv (enc_t *enc, SV *sv)	750	encode_sv (enc_t *enc, SV *sv)
409	{	751	{
…		…
411		753
412	if (SvPOKp (sv))	754	if (SvPOKp (sv))
413	{	755	{
414	STRLEN len;	756	STRLEN len;
415	char *str = SvPV (sv, len);	757	char *str = SvPV (sv, len);
416	encode_str (enc, SvUTF8 (sv), str, len);	758	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
417	}	759	}
418	else if (SvNOKp (sv))	760	else if (SvNOKp (sv))
419	encode_nv (enc, sv);	761	encode_nv (enc, sv);
420	else if (SvIOKp (sv))	762	else if (SvIOKp (sv))
421	{	763	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))	764	else if (SvROK (sv))
430	encode_rv (enc, SvRV (sv));	765	encode_rv (enc, SvRV (sv));
431	else if (!SvOK (sv))	766	else if (!SvOK (sv))
432	encode_ch (enc, 0xe0 | 22);	767	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
433	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	768	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
434	encode_ch (enc, 0xe0 | 23);	769	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
435	else	770	else
436	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	771	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
437	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	772	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
438	}	773	}
439		774
440	static SV *	775	static SV *
441	encode_cbor (SV *scalar, CBOR *cbor)	776	encode_cbor (SV *scalar, CBOR *cbor)
442	{	777	{
443	enc_t enc;	778	enc_t enc = { 0 };
444		779
445	enc.cbor = *cbor;	780	enc.cbor = *cbor;
446	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	781	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
447	enc.cur = SvPVX (enc.sv);	782	enc.cur = SvPVX (enc.sv);
448	enc.end = SvEND (enc.sv);	783	enc.end = SvEND (enc.sv);
449	enc.depth = 0;
450		784
451	SvPOK_only (enc.sv);	785	SvPOK_only (enc.sv);
		786
		787	if (cbor->flags & F_PACK_STRINGS)
		788	{
		789	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		790	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		791	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		792	}
		793
452	encode_sv (&enc, scalar);	794	encode_sv (&enc, scalar);
453		795
454	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	796	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
455	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	797	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
456		798
…		…
470	U8 *end; // end of input string	812	U8 *end; // end of input string
471	const char *err; // parse error, if != 0	813	const char *err; // parse error, if != 0
472	CBOR cbor;	814	CBOR cbor;
473	U32 depth; // recursion depth	815	U32 depth; // recursion depth
474	U32 maxdepth; // recursion depth limit	816	U32 maxdepth; // recursion depth limit
		817	AV *shareable;
		818	AV *stringref;
		819	SV *decode_tagged;
		820	SV *err_sv; // optional sv for error, needs to be freed
475	} dec_t;	821	} dec_t;
476		822
477	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	823	// set dec->err to ERRSV
		824	ecb_cold static void
		825	err_errsv (dec_t *dec)
		826	{
		827	if (!dec->err)
		828	{
		829	dec->err_sv = newSVsv (ERRSV);
478		830
479	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	831	// chop off the trailing \n
		832	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		833	*SvEND (dec->err_sv) = 0;
480		834
		835	dec->err = SvPVutf8_nolen (dec->err_sv);
		836	}
		837	}
		838
		839	// the following functions are used to reduce code size and help the compiler to optimise
		840	ecb_cold static void
		841	err_set (dec_t *dec, const char *reason)
		842	{
		843	if (!dec->err)
		844	dec->err = reason;
		845	}
		846
		847	ecb_cold static void
		848	err_unexpected_end (dec_t *dec)
		849	{
		850	err_set (dec, "unexpected end of CBOR data");
		851	}
		852
		853	#define ERR_DO(do) SB do; goto fail; SE
		854	#define ERR(reason) ERR_DO (err_set (dec, reason))
		855	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		856
		857	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		858
481	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	859	#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	860	#define DEC_DEC_DEPTH --dec->depth
483		861
484	static UV	862	static UV
485	decode_uint (dec_t *dec)	863	decode_uint (dec_t *dec)
486	{	864	{
487	switch (*dec->cur & 31)	865	U8 m = *dec->cur & MINOR_MASK;
488	{	866	++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		867
494	case 24:	868	if (ecb_expect_true (m < LENGTH_EXT1))
		869	return m;
		870	else if (ecb_expect_true (m == LENGTH_EXT1))
		871	{
495	WANT (2);	872	WANT (1);
496	dec->cur += 2;	873	dec->cur += 1;
497	return dec->cur[-1];	874	return dec->cur[-1];
498		875	}
499	case 25:	876	else if (ecb_expect_true (m == LENGTH_EXT2))
		877	{
500	WANT (3);	878	WANT (2);
501	dec->cur += 3;	879	dec->cur += 2;
502	return (((UV)dec->cur[-2]) << 8)	880	return (((UV)dec->cur[-2]) << 8)
503	| ((UV)dec->cur[-1]);	881	| ((UV)dec->cur[-1]);
504		882	}
505	case 26:	883	else if (ecb_expect_true (m == LENGTH_EXT4))
		884	{
506	WANT (5);	885	WANT (4);
507	dec->cur += 5;	886	dec->cur += 4;
508	return (((UV)dec->cur[-4]) << 24)	887	return (((UV)dec->cur[-4]) << 24)
509	| (((UV)dec->cur[-3]) << 16)	888	| (((UV)dec->cur[-3]) << 16)
510	| (((UV)dec->cur[-2]) << 8)	889	| (((UV)dec->cur[-2]) << 8)
511	| ((UV)dec->cur[-1]);	890	| ((UV)dec->cur[-1]);
512		891	}
513	case 27:	892	else if (ecb_expect_true (m == LENGTH_EXT8))
		893	{
514	WANT (9);	894	WANT (8);
515	dec->cur += 9;	895	dec->cur += 8;
		896
		897	return
		898	#if UVSIZE < 8
		899	0
		900	#else
516	return (((UV)dec->cur[-8]) << 56)	901	(((UV)dec->cur[-8]) << 56)
517	| (((UV)dec->cur[-7]) << 48)	902	| (((UV)dec->cur[-7]) << 48)
518	| (((UV)dec->cur[-6]) << 40)	903	| (((UV)dec->cur[-6]) << 40)
519	| (((UV)dec->cur[-5]) << 32)	904	| (((UV)dec->cur[-5]) << 32)
		905	#endif
520	| (((UV)dec->cur[-4]) << 24)	906	| (((UV)dec->cur[-4]) << 24)
521	| (((UV)dec->cur[-3]) << 16)	907	| (((UV)dec->cur[-3]) << 16)
522	| (((UV)dec->cur[-2]) << 8)	908	| (((UV)dec->cur[-2]) << 8)
523	| ((UV)dec->cur[-1]);	909	| ((UV)dec->cur[-1]);
524		910	}
525	default:	911	else
526	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	912	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
527	}
528		913
529	fail:	914	fail:
530	return 0;	915	return 0;
531	}	916	}
532		917
…		…
537	{	922	{
538	AV *av = newAV ();	923	AV *av = newAV ();
539		924
540	DEC_INC_DEPTH;	925	DEC_INC_DEPTH;
541		926
542	if ((*dec->cur & 31) == 31)	927	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
543	{	928	{
544	++dec->cur;	929	++dec->cur;
545		930
546	for (;;)	931	for (;;)
547	{	932	{
548	WANT (1);	933	WANT (1);
549		934
550	if (*dec->cur == (0xe0 | 31))	935	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
551	{	936	{
552	++dec->cur;	937	++dec->cur;
553	break;	938	break;
554	}	939	}
555		940
556	av_push (av, decode_sv (dec));	941	av_push (av, decode_sv (dec));
557	}	942	}
558	}	943	}
559	else	944	else
560	{	945	{
561	int i, len = decode_uint (dec);	946	UV i, len = decode_uint (dec);
562		947
		948	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);	949	av_fill (av, len - 1);
564		950
565	for (i = 0; i < len; ++i)	951	for (i = 0; i < len; ++i)
566	AvARRAY (av)[i] = decode_sv (dec);	952	AvARRAY (av)[i] = decode_sv (dec);
567	}	953	}
568		954
569	DEC_DEC_DEPTH;	955	DEC_DEC_DEPTH;
570	return newRV_noinc ((SV *)av);	956	return newRV_noinc ((SV *)av);
571		957
572	fail:	958	fail:
573	SvREFCNT_dec (av);	959	SvREFCNT_dec_NN (av);
574	DEC_DEC_DEPTH;	960	DEC_DEC_DEPTH;
575	return &PL_sv_undef;	961	return &PL_sv_undef;
576	}	962	}
577		963
		964	static void
		965	decode_he (dec_t *dec, HV *hv)
		966	{
		967	// for speed reasons, we specialcase single-string
		968	// byte or utf-8 strings as keys, but only when !stringref
		969
		970	if (ecb_expect_true (!dec->stringref))
		971	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		972	{
		973	STRLEN len = decode_uint (dec);
		974	char *key = (char *)dec->cur;
		975
		976	WANT (len);
		977	dec->cur += len;
		978
		979	hv_store (hv, key, len, decode_sv (dec), 0);
		980
		981	return;
		982	}
		983	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		984	{
		985	STRLEN len = decode_uint (dec);
		986	char *key = (char *)dec->cur;
		987
		988	WANT (len);
		989	dec->cur += len;
		990
		991	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		992	if (!is_utf8_string ((U8 *)key, len))
		993	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		994
		995	hv_store (hv, key, -len, decode_sv (dec), 0);
		996
		997	return;
		998	}
		999
		1000	SV *k = decode_sv (dec);
		1001	SV *v = decode_sv (dec);
		1002
		1003	// we leak memory if uncaught exceptions are thrown by random magical
		1004	// methods, and this is hopefully the only place where it can happen,
		1005	// so if there is a chance of an exception, take the very slow path.
		1006	// since catching exceptions is "undocumented/internal/forbidden" by
		1007	// the new p5p powers, we need to call out to a perl function :/
		1008	if (ecb_expect_false (SvAMAGIC (k)))
		1009	{
		1010	dSP;
		1011
		1012	ENTER; SAVETMPS;
		1013	PUSHMARK (SP);
		1014	EXTEND (SP, 3);
		1015	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		1016	PUSHs (sv_2mortal (k));
		1017	PUSHs (sv_2mortal (v));
		1018
		1019	PUTBACK;
		1020	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		1021	SPAGAIN;
		1022
		1023	FREETMPS; LEAVE;
		1024
		1025	if (SvTRUE (ERRSV))
		1026	ERR_ERRSV;
		1027
		1028	return;
		1029	}
		1030
		1031	hv_store_ent (hv, k, v, 0);
		1032	SvREFCNT_dec_NN (k);
		1033
		1034	fail:
		1035	;
		1036	}
		1037
578	static SV *	1038	static SV *
579	decode_hv (dec_t *dec)	1039	decode_hv (dec_t *dec)
580	{	1040	{
581	HV *hv = newHV ();	1041	HV *hv = newHV ();
582		1042
583	DEC_INC_DEPTH;	1043	DEC_INC_DEPTH;
584		1044
585	if ((*dec->cur & 31) == 31)	1045	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
586	{	1046	{
587	++dec->cur;	1047	++dec->cur;
588		1048
589	for (;;)	1049	for (;;)
590	{	1050	{
591	WANT (1);	1051	WANT (1);
592		1052
593	if (*dec->cur == (0xe0 | 31))	1053	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
594	{	1054	{
595	++dec->cur;	1055	++dec->cur;
596	break;	1056	break;
597	}	1057	}
598		1058
599	SV *k = decode_sv (dec);	1059	decode_he (dec, hv);
600	SV *v = decode_sv (dec);
601
602	hv_store_ent (hv, k, v, 0);
603	SvREFCNT_dec (k);
604	}	1060	}
605	}	1061	}
606	else	1062	else
607	{	1063	{
608	int len = decode_uint (dec);	1064	UV pairs = decode_uint (dec);
609		1065
		1066	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1067
610	while (len--)	1068	while (pairs--)
611	{	1069	decode_he (dec, hv);
612	SV *k = decode_sv (dec);
613	SV *v = decode_sv (dec);
614
615	hv_store_ent (hv, k, v, 0);
616	SvREFCNT_dec (k);
617	}
618	}	1070	}
619		1071
620	DEC_DEC_DEPTH;	1072	DEC_DEC_DEPTH;
621	return newRV_noinc ((SV *)hv);	1073	return newRV_noinc ((SV *)hv);
622		1074
623	fail:	1075	fail:
624	SvREFCNT_dec (hv);	1076	SvREFCNT_dec_NN (hv);
625	DEC_DEC_DEPTH;	1077	DEC_DEC_DEPTH;
626	return &PL_sv_undef;	1078	return &PL_sv_undef;
627	}	1079	}
628		1080
629	static SV *	1081	static SV *
630	decode_str (dec_t *dec, int utf8)	1082	decode_str (dec_t *dec, int utf8)
631	{	1083	{
632	SV *sv = 0;	1084	SV *sv = 0;
633		1085
634	if ((*dec->cur & 31) == 31)	1086	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
635	{	1087	{
		1088	// indefinite length strings
636	++dec->cur;	1089	++dec->cur;
637		1090
		1091	U8 major = *dec->cur & MAJOR_MISC;
		1092
638	sv = newSVpvn ("", 0);	1093	sv = newSVpvn ("", 0);
639		1094
640	// not very fast, and certainly not robust against illegal input
641	for (;;)	1095	for (;;)
642	{	1096	{
643	WANT (1);	1097	WANT (1);
644		1098
645	if (*dec->cur == (0xe0 | 31))	1099	if ((*dec->cur - major) > LENGTH_EXT8)
		1100	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
646	{	1101	{
647	++dec->cur;	1102	++dec->cur;
648	break;	1103	break;
649	}	1104	}
		1105	else
		1106	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
650		1107
651	sv_catsv (sv, decode_sv (dec));	1108	STRLEN len = decode_uint (dec);
		1109
		1110	WANT (len);
		1111	sv_catpvn (sv, dec->cur, len);
		1112	dec->cur += len;
652	}	1113	}
653	}	1114	}
654	else	1115	else
655	{	1116	{
656	STRLEN len = decode_uint (dec);	1117	STRLEN len = decode_uint (dec);
657		1118
658	WANT (len);	1119	WANT (len);
659	sv = newSVpvn (dec->cur, len);	1120	sv = newSVpvn (dec->cur, len);
660	dec->cur += len;	1121	dec->cur += len;
		1122
		1123	if (ecb_expect_false (dec->stringref)
		1124	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		1125	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
661	}	1126	}
662		1127
663	if (utf8)	1128	if (utf8)
		1129	{
		1130	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		1131	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		1132	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		1133
664	SvUTF8_on (sv);	1134	SvUTF8_on (sv);
		1135	}
665		1136
666	return sv;	1137	return sv;
667		1138
668	fail:	1139	fail:
669	SvREFCNT_dec (sv);	1140	SvREFCNT_dec (sv);
…		…
671	}	1142	}
672		1143
673	static SV *	1144	static SV *
674	decode_tagged (dec_t *dec)	1145	decode_tagged (dec_t *dec)
675	{	1146	{
		1147	SV *sv = 0;
676	UV tag = decode_uint (dec);	1148	UV tag = decode_uint (dec);
		1149
		1150	WANT (1);
		1151
		1152	switch (tag)
		1153	{
		1154	case CBOR_TAG_MAGIC:
677	SV *sv = decode_sv (dec);	1155	sv = decode_sv (dec);
		1156	break;
678		1157
679	if (tag == CBOR_TAG_MAGIC)	1158	case CBOR_TAG_INDIRECTION:
680	return sv;	1159	sv = newRV_noinc (decode_sv (dec));
681	else if (tag == CBOR_TAG_PERL_OBJECT)	1160	break;
682	{	1161
		1162	case CBOR_TAG_STRINGREF_NAMESPACE:
		1163	{
		1164	// do not use SAVETMPS/FREETMPS, as these will
		1165	// erase mortalised caches, e.g. "shareable"
		1166	ENTER;
		1167
		1168	SAVESPTR (dec->stringref);
		1169	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1170
		1171	sv = decode_sv (dec);
		1172
		1173	LEAVE;
		1174	}
		1175	break;
		1176
		1177	case CBOR_TAG_STRINGREF:
		1178	{
		1179	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1180	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1181
		1182	UV idx = decode_uint (dec);
		1183
		1184	if (!dec->stringref || idx >= (UV)(1 + AvFILLp (dec->stringref)))
		1185	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1186
		1187	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1188	}
		1189	break;
		1190
		1191	case CBOR_TAG_VALUE_SHAREABLE:
		1192	{
		1193	if (ecb_expect_false (!dec->shareable))
		1194	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1195
		1196	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1197	{
		1198	sv = newSV (0);
		1199	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1200
		1201	SV *osv = decode_sv (dec);
		1202	sv_setsv (sv, osv);
		1203	SvREFCNT_dec_NN (osv);
		1204	}
		1205	else
		1206	{
		1207	av_push (dec->shareable, &PL_sv_undef);
		1208	int idx = AvFILLp (dec->shareable);
		1209	sv = decode_sv (dec);
		1210	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1211	}
		1212	}
		1213	break;
		1214
		1215	case CBOR_TAG_VALUE_SHAREDREF:
		1216	{
		1217	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1218	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1219
		1220	UV idx = decode_uint (dec);
		1221
		1222	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
		1223	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1224
		1225	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1226
		1227	if (sv == &PL_sv_undef)
		1228	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1229	}
		1230	break;
		1231
		1232	case CBOR_TAG_PERL_OBJECT:
		1233	{
		1234	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1235	goto filter;
		1236
		1237	sv = decode_sv (dec);
		1238
683	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)	1239	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
684	ERR ("corrupted CBOR data (non-array perl object)");	1240	ERR ("corrupted CBOR data (non-array perl object)");
685		1241
686	AV *av = (AV *)SvRV (sv);	1242	AV *av = (AV *)SvRV (sv);
687	int len = av_len (av) + 1;	1243	int len = av_len (av) + 1;
688	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);	1244	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
689		1245
690	if (!stash)	1246	if (!stash)
691	ERR ("cannot decode perl-object (package does not exist)");	1247	ERR ("cannot decode perl-object (package does not exist)");
692		1248
693	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);	1249	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
694		1250
695	if (!method)	1251	if (!method)
696	ERR ("cannot decode perl-object (package does not have a THAW method)");	1252	ERR ("cannot decode perl-object (package does not have a THAW method)");
697		1253
698	dSP;	1254	dSP;
699		1255
700	ENTER; SAVETMPS; PUSHMARK (SP);	1256	ENTER; SAVETMPS;
		1257	PUSHMARK (SP);
701	EXTEND (SP, len + 1);	1258	EXTEND (SP, len + 1);
702	// we re-bless the reference to get overload and other niceties right	1259	// we re-bless the reference to get overload and other niceties right
703	PUSHs (*av_fetch (av, 0, 1));	1260	PUSHs (*av_fetch (av, 0, 1));
704	PUSHs (sv_cbor);	1261	PUSHs (sv_cbor);
705		1262
706	int i;	1263	int i;
707		1264
708	for (i = 1; i < len; ++i)	1265	for (i = 1; i < len; ++i)
709	PUSHs (*av_fetch (av, i, 1));	1266	PUSHs (*av_fetch (av, i, 1));
710		1267
711	PUTBACK;	1268	PUTBACK;
712	call_sv ((SV *)GvCV (method), G_SCALAR);	1269	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
713	SPAGAIN;	1270	SPAGAIN;
714		1271
		1272	if (SvTRUE (ERRSV))
		1273	{
		1274	FREETMPS; LEAVE;
		1275	ERR_ERRSV;
		1276	}
		1277
		1278	SvREFCNT_dec_NN (sv);
715	sv = SvREFCNT_inc (POPs);	1279	sv = SvREFCNT_inc (POPs);
716		1280
717	PUTBACK;	1281	PUTBACK;
718		1282
719	FREETMPS; LEAVE;	1283	FREETMPS; LEAVE;
		1284	}
		1285	break;
720		1286
721	return sv;	1287	default:
722	}	1288	filter:
723	else	1289	{
724	{	1290	SV *tag_sv = newSVuv (tag);
		1291
		1292	sv = decode_sv (dec);
		1293
		1294	dSP;
		1295	ENTER; SAVETMPS;
		1296	PUSHMARK (SP);
		1297	EXTEND (SP, 2);
		1298	PUSHs (tag_sv);
		1299	PUSHs (sv);
		1300
		1301	PUTBACK;
		1302	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1303	SPAGAIN;
		1304
		1305	if (SvTRUE (ERRSV))
		1306	{
		1307	SvREFCNT_dec_NN (tag_sv);
		1308	FREETMPS; LEAVE;
		1309	ERR_ERRSV;
		1310	}
		1311
		1312	if (count)
		1313	{
		1314	SvREFCNT_dec_NN (tag_sv);
		1315	SvREFCNT_dec_NN (sv);
		1316	sv = SvREFCNT_inc_NN (TOPs);
		1317	SP -= count;
		1318	}
		1319	else
		1320	{
725	AV *av = newAV ();	1321	AV *av = newAV ();
726	av_push (av, newSVuv (tag));	1322	av_push (av, tag_sv);
727	av_push (av, sv);	1323	av_push (av, sv);
728		1324
729	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	1325	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
730	? cbor_tagged_stash	1326	? cbor_tagged_stash
731	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1327	: gv_stashpv ("CBOR::XS::Tagged" , 1);
732
733	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);	1328	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1329	}
		1330
		1331	PUTBACK;
		1332
		1333	FREETMPS; LEAVE;
		1334	}
		1335	break;
734	}	1336	}
		1337
		1338	return sv;
735		1339
736	fail:	1340	fail:
737	SvREFCNT_dec (sv);	1341	SvREFCNT_dec (sv);
738	return &PL_sv_undef;	1342	return &PL_sv_undef;
739	}	1343	}
…		…
741	static SV *	1345	static SV *
742	decode_sv (dec_t *dec)	1346	decode_sv (dec_t *dec)
743	{	1347	{
744	WANT (1);	1348	WANT (1);
745		1349
746	switch (*dec->cur >> 5)	1350	switch (*dec->cur >> MAJOR_SHIFT)
747	{	1351	{
748	case 0: // unsigned int	1352	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
749	return newSVuv (decode_uint (dec));	1353	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
750	case 1: // negative int	1354	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
751	return newSViv (-1 - (IV)decode_uint (dec));	1355	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
752	case 2: // octet string	1356	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
753	return decode_str (dec, 0);	1357	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
754	case 3: // utf-8 string	1358	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
755	return decode_str (dec, 1);	1359
756	case 4: // array	1360	case MAJOR_MISC >> MAJOR_SHIFT:
757	return decode_av (dec);
758	case 5: // map
759	return decode_hv (dec);
760	case 6: // tag
761	return decode_tagged (dec);
762	case 7: // misc
763	switch (*dec->cur++ & 31)	1361	switch (*dec->cur++ & MINOR_MASK)
764	{	1362	{
765	case 20:	1363	case SIMPLE_FALSE:
766	#if CBOR_SLOW	1364	#if CBOR_SLOW
767	types_false = get_bool ("Types::Serialiser::false");	1365	types_false = get_bool ("Types::Serialiser::false");
768	#endif	1366	#endif
769	return newSVsv (types_false);	1367	return newSVsv (types_false);
770	case 21:	1368	case SIMPLE_TRUE:
771	#if CBOR_SLOW	1369	#if CBOR_SLOW
772	types_true = get_bool ("Types::Serialiser::true");	1370	types_true = get_bool ("Types::Serialiser::true");
773	#endif	1371	#endif
774	return newSVsv (types_true);	1372	return newSVsv (types_true);
775	case 22:	1373	case SIMPLE_NULL:
776	return newSVsv (&PL_sv_undef);	1374	return newSVsv (&PL_sv_undef);
777	case 23:	1375	case SIMPLE_UNDEF:
778	#if CBOR_SLOW	1376	#if CBOR_SLOW
779	types_error = get_bool ("Types::Serialiser::error");	1377	types_error = get_bool ("Types::Serialiser::error");
780	#endif	1378	#endif
781	return newSVsv (types_error);	1379	return newSVsv (types_error);
782		1380
783	case 25:	1381	case MISC_FLOAT16:
784	{	1382	{
785	WANT (2);	1383	WANT (2);
786		1384
787	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1385	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
788	dec->cur += 2;	1386	dec->cur += 2;
789		1387
790	return newSVnv (ecb_binary16_to_float (fp));	1388	return newSVnv (ecb_binary16_to_float (fp));
791	}	1389	}
792		1390
793	case 26:	1391	case MISC_FLOAT32:
794	{	1392	{
795	uint32_t fp;	1393	uint32_t fp;
796	WANT (4);	1394	WANT (4);
797	memcpy (&fp, dec->cur, 4);	1395	memcpy (&fp, dec->cur, 4);
798	dec->cur += 4;	1396	dec->cur += 4;
…		…
801	fp = ecb_bswap32 (fp);	1399	fp = ecb_bswap32 (fp);
802		1400
803	return newSVnv (ecb_binary32_to_float (fp));	1401	return newSVnv (ecb_binary32_to_float (fp));
804	}	1402	}
805		1403
806	case 27:	1404	case MISC_FLOAT64:
807	{	1405	{
808	uint64_t fp;	1406	uint64_t fp;
809	WANT (8);	1407	WANT (8);
810	memcpy (&fp, dec->cur, 8);	1408	memcpy (&fp, dec->cur, 8);
811	dec->cur += 8;	1409	dec->cur += 8;
…		…
814	fp = ecb_bswap64 (fp);	1412	fp = ecb_bswap64 (fp);
815		1413
816	return newSVnv (ecb_binary64_to_double (fp));	1414	return newSVnv (ecb_binary64_to_double (fp));
817	}	1415	}
818		1416
819	// 0..19 unassigned	1417	// 0..19 unassigned simple
820	// 24 reserved + unassigned (reserved values are not encodable)	1418	// 24 reserved + unassigned simple (reserved values are not encodable)
		1419	// 28-30 unassigned misc
		1420	// 31 break code
821	default:	1421	default:
822	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1422	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
823	}	1423	}
824		1424
825	break;	1425	break;
826	}	1426	}
827		1427
…		…
830	}	1430	}
831		1431
832	static SV *	1432	static SV *
833	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1433	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
834	{	1434	{
835	dec_t dec;	1435	dec_t dec = { 0 };
836	SV *sv;	1436	SV *sv;
		1437	STRLEN len;
		1438	char *data = SvPVbyte (string, len);
837		1439
838	/* work around bugs in 5.10 where manipulating magic values
839	* makes perl ignore the magic in subsequent accesses.
840	* also make a copy of non-PV values, to get them into a clean
841	* state (SvPV should do that, but it's buggy, see below).
842	*/
843	/*SvGETMAGIC (string);*/
844	if (SvMAGICAL (string) || !SvPOK (string))
845	string = sv_2mortal (newSVsv (string));
846
847	SvUPGRADE (string, SVt_PV);
848
849	/* work around a bug in perl 5.10, which causes SvCUR to fail an
850	* assertion with -DDEBUGGING, although SvCUR is documented to
851	* return the xpv_cur field which certainly exists after upgrading.
852	* according to nicholas clark, calling SvPOK fixes this.
853	* But it doesn't fix it, so try another workaround, call SvPV_nolen
854	* and hope for the best.
855	* Damnit, SvPV_nolen still trips over yet another assertion. This
856	* assertion business is seriously broken, try yet another workaround
857	* for the broken -DDEBUGGING.
858	*/
859	{
860	#ifdef DEBUGGING
861	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
862	#else
863	STRLEN offset = SvCUR (string);
864	#endif
865
866	if (offset > cbor->max_size && cbor->max_size)	1440	if (len > cbor->max_size && cbor->max_size)
867	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1441	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
868	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1442	(unsigned long)len, (unsigned long)cbor->max_size);
869	}
870
871	sv_utf8_downgrade (string, 0);
872		1443
873	dec.cbor = *cbor;	1444	dec.cbor = *cbor;
874	dec.cur = (U8 *)SvPVX (string);	1445	dec.cur = (U8 *)data;
875	dec.end = (U8 *)SvEND (string);	1446	dec.end = (U8 *)data + len;
876	dec.err = 0;
877	dec.depth = 0;
878		1447
879	sv = decode_sv (&dec);	1448	sv = decode_sv (&dec);
880		1449
881	if (offset_return)	1450	if (offset_return)
882	*offset_return = dec.cur;	1451	*offset_return = dec.cur;
…		…
885	if (dec.cur != dec.end && !dec.err)	1454	if (dec.cur != dec.end && !dec.err)
886	dec.err = "garbage after CBOR object";	1455	dec.err = "garbage after CBOR object";
887		1456
888	if (dec.err)	1457	if (dec.err)
889	{	1458	{
		1459	if (dec.shareable)
		1460	{
		1461	// need to break cyclic links, which would all be in shareable
		1462	int i;
		1463	SV **svp;
		1464
		1465	for (i = av_len (dec.shareable) + 1; i--; )
		1466	if ((svp = av_fetch (dec.shareable, i, 0)))
		1467	sv_setsv (*svp, &PL_sv_undef);
		1468	}
		1469
890	SvREFCNT_dec (sv);	1470	SvREFCNT_dec_NN (sv);
		1471
		1472	if (dec.err_sv)
		1473	sv_2mortal (dec.err_sv);
		1474
891	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1475	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
892	}	1476	}
893		1477
894	sv = sv_2mortal (sv);	1478	sv = sv_2mortal (sv);
895		1479
896	return sv;	1480	return sv;
897	}	1481	}
898		1482
		1483	/////////////////////////////////////////////////////////////////////////////
		1484	// incremental parser
		1485
		1486	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1487
		1488	// returns 0 for notyet, 1 for success or error
		1489	static int
		1490	incr_parse (CBOR *self, SV *cborstr)
		1491	{
		1492	STRLEN cur;
		1493	SvPV (cborstr, cur);
		1494
		1495	while (ecb_expect_true (self->incr_need <= cur))
		1496	{
		1497	// table of integer count bytes
		1498	static I8 incr_len[MINOR_MASK + 1] = {
		1499	0, 0, 0, 0, 0, 0, 0, 0,
		1500	0, 0, 0, 0, 0, 0, 0, 0,
		1501	0, 0, 0, 0, 0, 0, 0, 0,
		1502	1, 2, 4, 8,-1,-1,-1,-2
		1503	};
		1504
		1505	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1506	U8 m = *p & MINOR_MASK;
		1507	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1508	I8 ilen = incr_len[m];
		1509
		1510	self->incr_need = self->incr_pos + 1;
		1511
		1512	if (ecb_expect_false (ilen < 0))
		1513	{
		1514	if (m != MINOR_INDEF)
		1515	return 1; // error
		1516
		1517	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1518	{
		1519	if (count >= 0)
		1520	return 1; // error
		1521
		1522	count = 1;
		1523	}
		1524	else
		1525	{
		1526	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1527	count = -1;
		1528	}
		1529	}
		1530	else
		1531	{
		1532	self->incr_need += ilen;
		1533	if (ecb_expect_false (self->incr_need > cur))
		1534	return 0;
		1535
		1536	int major = *p >> MAJOR_SHIFT;
		1537
		1538	switch (major)
		1539	{
		1540	case MAJOR_TAG >> MAJOR_SHIFT:
		1541	++count; // tags merely prefix another value
		1542	break;
		1543
		1544	case MAJOR_BYTES >> MAJOR_SHIFT:
		1545	case MAJOR_TEXT >> MAJOR_SHIFT:
		1546	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1547	case MAJOR_MAP >> MAJOR_SHIFT:
		1548	{
		1549	UV len;
		1550
		1551	if (ecb_expect_false (ilen))
		1552	{
		1553	len = 0;
		1554
		1555	do {
		1556	len = (len << 8) | *++p;
		1557	} while (--ilen);
		1558	}
		1559	else
		1560	len = m;
		1561
		1562	switch (major)
		1563	{
		1564	case MAJOR_BYTES >> MAJOR_SHIFT:
		1565	case MAJOR_TEXT >> MAJOR_SHIFT:
		1566	self->incr_need += len;
		1567	if (ecb_expect_false (self->incr_need > cur))
		1568	return 0;
		1569
		1570	break;
		1571
		1572	case MAJOR_MAP >> MAJOR_SHIFT:
		1573	len <<= 1;
		1574	/* FALLTHROUGH */
		1575	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1576	if (len)
		1577	{
		1578	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1579	count = len + 1;
		1580	}
		1581	break;
		1582	}
		1583	}
		1584	}
		1585	}
		1586
		1587	self->incr_pos = self->incr_need;
		1588
		1589	if (count > 0)
		1590	{
		1591	while (!--count)
		1592	{
		1593	if (!AvFILLp (self->incr_count))
		1594	return 1; // done
		1595
		1596	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1597	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1598	}
		1599
		1600	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1601	}
		1602	}
		1603
		1604	return 0;
		1605	}
		1606
		1607
899	/////////////////////////////////////////////////////////////////////////////	1608	/////////////////////////////////////////////////////////////////////////////
900	// XS interface functions	1609	// XS interface functions
901		1610
902	MODULE = CBOR::XS PACKAGE = CBOR::XS	1611	MODULE = CBOR::XS PACKAGE = CBOR::XS
903		1612
…		…
911		1620
912	types_true = get_bool ("Types::Serialiser::true" );	1621	types_true = get_bool ("Types::Serialiser::true" );
913	types_false = get_bool ("Types::Serialiser::false");	1622	types_false = get_bool ("Types::Serialiser::false");
914	types_error = get_bool ("Types::Serialiser::error");	1623	types_error = get_bool ("Types::Serialiser::error");
915		1624
		1625	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1626
916	sv_cbor = newSVpv ("CBOR", 0);	1627	sv_cbor = newSVpv ("CBOR", 0);
917	SvREADONLY_on (sv_cbor);	1628	SvREADONLY_on (sv_cbor);
		1629
		1630	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
918	}	1631	}
919		1632
920	PROTOTYPES: DISABLE	1633	PROTOTYPES: DISABLE
921		1634
922	void CLONE (...)	1635	void CLONE (...)
…		…
940		1653
941	void shrink (CBOR *self, int enable = 1)	1654	void shrink (CBOR *self, int enable = 1)
942	ALIAS:	1655	ALIAS:
943	shrink = F_SHRINK	1656	shrink = F_SHRINK
944	allow_unknown = F_ALLOW_UNKNOWN	1657	allow_unknown = F_ALLOW_UNKNOWN
		1658	allow_sharing = F_ALLOW_SHARING
		1659	allow_cycles = F_ALLOW_CYCLES
		1660	forbid_objects = F_FORBID_OBJECTS
		1661	pack_strings = F_PACK_STRINGS
		1662	text_keys = F_TEXT_KEYS
		1663	text_strings = F_TEXT_STRINGS
		1664	validate_utf8 = F_VALIDATE_UTF8
945	PPCODE:	1665	PPCODE:
946	{	1666	{
947	if (enable)	1667	if (enable)
948	self->flags |= ix;	1668	self->flags |= ix;
949	else	1669	else
…		…
954		1674
955	void get_shrink (CBOR *self)	1675	void get_shrink (CBOR *self)
956	ALIAS:	1676	ALIAS:
957	get_shrink = F_SHRINK	1677	get_shrink = F_SHRINK
958	get_allow_unknown = F_ALLOW_UNKNOWN	1678	get_allow_unknown = F_ALLOW_UNKNOWN
		1679	get_allow_sharing = F_ALLOW_SHARING
		1680	get_allow_cycles = F_ALLOW_CYCLES
		1681	get_forbid_objects = F_FORBID_OBJECTS
		1682	get_pack_strings = F_PACK_STRINGS
		1683	get_text_keys = F_TEXT_KEYS
		1684	get_text_strings = F_TEXT_STRINGS
		1685	get_validate_utf8 = F_VALIDATE_UTF8
959	PPCODE:	1686	PPCODE:
960	XPUSHs (boolSV (self->flags & ix));	1687	XPUSHs (boolSV (self->flags & ix));
961		1688
962	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1689	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
963	PPCODE:	1690	PPCODE:
…		…
979	CODE:	1706	CODE:
980	RETVAL = self->max_size;	1707	RETVAL = self->max_size;
981	OUTPUT:	1708	OUTPUT:
982	RETVAL	1709	RETVAL
983		1710
984	#if 0 //TODO	1711	void filter (CBOR *self, SV *filter = 0)
985
986	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
987	PPCODE:	1712	PPCODE:
988	{
989	SvREFCNT_dec (self->cb_object);	1713	SvREFCNT_dec (self->filter);
990	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1714	self->filter = filter ? newSVsv (filter) : filter;
991
992	XPUSHs (ST (0));	1715	XPUSHs (ST (0));
993	}
994		1716
995	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1717	SV *get_filter (CBOR *self)
996	PPCODE:	1718	CODE:
997	{	1719	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
998	if (!self->cb_sk_object)	1720	OUTPUT:
999	self->cb_sk_object = newHV ();	1721	RETVAL
1000
1001	if (SvOK (cb))
1002	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1003	else
1004	{
1005	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1006
1007	if (!HvKEYS (self->cb_sk_object))
1008	{
1009	SvREFCNT_dec (self->cb_sk_object);
1010	self->cb_sk_object = 0;
1011	}
1012	}
1013
1014	XPUSHs (ST (0));
1015	}
1016
1017	#endif
1018		1722
1019	void encode (CBOR *self, SV *scalar)	1723	void encode (CBOR *self, SV *scalar)
1020	PPCODE:	1724	PPCODE:
1021	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1725	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1022	XPUSHs (scalar);	1726	XPUSHs (scalar);
…		…
1035	EXTEND (SP, 2);	1739	EXTEND (SP, 2);
1036	PUSHs (sv);	1740	PUSHs (sv);
1037	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1741	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1038	}	1742	}
1039		1743
1040	#if 0	1744	void incr_parse (CBOR *self, SV *cborstr)
		1745	ALIAS:
		1746	incr_parse_multiple = 1
		1747	PPCODE:
		1748	{
		1749	if (SvUTF8 (cborstr))
		1750	sv_utf8_downgrade (cborstr, 0);
		1751
		1752	if (!self->incr_count)
		1753	{
		1754	self->incr_count = newAV ();
		1755	self->incr_pos = 0;
		1756	self->incr_need = 1;
		1757
		1758	av_push (self->incr_count, newSViv (1));
		1759	}
		1760
		1761	do
		1762	{
		1763	if (!incr_parse (self, cborstr))
		1764	{
		1765	if (self->incr_need > self->max_size && self->max_size)
		1766	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1767	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1768
		1769	break;
		1770	}
		1771
		1772	SV *sv;
		1773	char *offset;
		1774
		1775	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1776	XPUSHs (sv);
		1777
		1778	sv_chop (cborstr, offset);
		1779
		1780	av_clear (self->incr_count);
		1781	av_push (self->incr_count, newSViv (1));
		1782
		1783	self->incr_pos = 0;
		1784	self->incr_need = self->incr_pos + 1;
		1785	}
		1786	while (ix);
		1787	}
		1788
		1789	void incr_reset (CBOR *self)
		1790	CODE:
		1791	{
		1792	SvREFCNT_dec (self->incr_count);
		1793	self->incr_count = 0;
		1794	}
1041		1795
1042	void DESTROY (CBOR *self)	1796	void DESTROY (CBOR *self)
1043	CODE:	1797	PPCODE:
1044	SvREFCNT_dec (self->cb_sk_object);	1798	cbor_free (self);
1045	SvREFCNT_dec (self->cb_object);
1046
1047	#endif
1048		1799
1049	PROTOTYPES: ENABLE	1800	PROTOTYPES: ENABLE
1050		1801
1051	void encode_cbor (SV *scalar)	1802	void encode_cbor (SV *scalar)
		1803	ALIAS:
		1804	encode_cbor = 0
		1805	encode_cbor_sharing = F_ALLOW_SHARING
1052	PPCODE:	1806	PPCODE:
1053	{	1807	{
1054	CBOR cbor;	1808	CBOR cbor;
1055	cbor_init (&cbor);	1809	cbor_init (&cbor);
		1810	cbor.flags |= ix;
1056	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1811	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1057	XPUSHs (scalar);	1812	XPUSHs (scalar);
1058	}	1813	}
1059		1814
1060	void decode_cbor (SV *cborstr)	1815	void decode_cbor (SV *cborstr)
…		…
1064	cbor_init (&cbor);	1819	cbor_init (&cbor);
1065	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1820	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1066	XPUSHs (cborstr);	1821	XPUSHs (cborstr);
1067	}	1822	}
1068		1823
		1824	#ifdef __AFL_COMPILER
		1825
		1826	void
		1827	afl_init ()
		1828	CODE:
		1829	__AFL_INIT ();
		1830
		1831	int
		1832	afl_loop (unsigned int count = 10000)
		1833	CODE:
		1834	RETVAL = __AFL_LOOP (count);
		1835	OUTPUT:
		1836	RETVAL
		1837
		1838	#endif
		1839

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