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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.1 by root, Fri Oct 25 23:09:45 2013 UTC vs.
Revision 1.70 by root, Fri Dec 4 02:57:14 2020 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	#if defined(__BORLANDC__) || defined(_MSC_VER)	16	// compatibility with perl <5.18
15	# define snprintf _snprintf // C compilers have this in stdio.h	17	#ifndef HvNAMELEN_get
		18	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
16	#endif	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
17		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	};
		69
		70	// known tags
		71	enum cbor_tag
		72	{
		73	// extensions
		74	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
		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
		81
		82	// rfc7049
		83	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
		84	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
		85	CBOR_TAG_POS_BIGNUM = 2, // byte string
		86	CBOR_TAG_NEG_BIGNUM = 3, // byte string
		87	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
		88	CBOR_TAG_BIGFLOAT = 5, // array
		89
		90	CBOR_TAG_CONV_B64U = 21, // base64url, any
		91	CBOR_TAG_CONV_B64 = 22, // base64, any
		92	CBOR_TAG_CONV_HEX = 23, // base16, any
		93	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
		94
		95	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
		96	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
		97	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
		98	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
		99	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
		100
		101	CBOR_TAG_MAGIC = 55799, // self-describe cbor
		102	};
		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
18	#define F_SHRINK 0x00000200UL	118	#define F_SHRINK 0x00000001UL
19	#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
20		127
21	#define INIT_SIZE 32 // initial scalar size to be allocated	128	#define INIT_SIZE 32 // initial scalar size to be allocated
22		129
23	#define SB do {	130	#define SB do {
24	#define SE } while (0)	131	#define SE } while (0)
25
26	#if __GNUC__ >= 3
27	# define expect(expr,value) __builtin_expect ((expr), (value))
28	# define INLINE static inline
29	#else
30	# define expect(expr,value) (expr)
31	# define INLINE static
32	#endif
33
34	#define expect_false(expr) expect ((expr) != 0, 0)
35	#define expect_true(expr) expect ((expr) != 0, 1)
36		132
37	#define IN_RANGE_INC(type,val,beg,end) \	133	#define IN_RANGE_INC(type,val,beg,end) \
38	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \	134	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
39	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))	135	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
40		136
…		…
46	#else	142	#else
47	# define CBOR_SLOW 0	143	# define CBOR_SLOW 0
48	# define CBOR_STASH cbor_stash	144	# define CBOR_STASH cbor_stash
49	#endif	145	#endif
50		146
51	static HV *cbor_stash, *cbor_boolean_stash; // CBOR::XS::	147	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
52	static SV *cbor_true, *cbor_false;	148	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
53		149
54	typedef struct {	150	typedef struct {
55	U32 flags;	151	U32 flags;
56	U32 max_depth;	152	U32 max_depth;
57	STRLEN max_size;	153	STRLEN max_size;
		154	SV *filter;
58		155
59	SV *cb_object;	156	// for the incremental parser
60	HV *cb_sk_object;	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.
61	} CBOR;	160	} CBOR;
62		161
63	INLINE void	162	ecb_inline void
64	cbor_init (CBOR *cbor)	163	cbor_init (CBOR *cbor)
65	{	164	{
66	Zero (cbor, 1, CBOR);	165	Zero (cbor, 1, CBOR);
67	cbor->max_depth = 512;	166	cbor->max_depth = 512;
68	}	167	}
69		168
		169	ecb_inline void
		170	cbor_free (CBOR *cbor)
		171	{
		172	SvREFCNT_dec (cbor->filter);
		173	SvREFCNT_dec (cbor->incr_count);
		174	}
		175
70	/////////////////////////////////////////////////////////////////////////////	176	/////////////////////////////////////////////////////////////////////////////
71	// utility functions	177	// utility functions
72		178
73	INLINE SV *	179	ecb_inline SV *
74	get_bool (const char *name)	180	get_bool (const char *name)
75	{	181	{
76	SV *sv = get_sv (name, 1);	182	SV *sv = get_sv (name, 1);
77		183
78	SvREADONLY_on (sv);	184	SvREADONLY_on (sv);
79	SvREADONLY_on (SvRV (sv));	185	SvREADONLY_on (SvRV (sv));
80		186
81	return sv;	187	return sv;
82	}	188	}
83		189
84	INLINE void	190	ecb_inline void
85	shrink (SV *sv)	191	shrink (SV *sv)
86	{	192	{
87	sv_utf8_downgrade (sv, 1);	193	sv_utf8_downgrade (sv, 1);
88		194
89	if (SvLEN (sv) > SvCUR (sv) + 1)	195	if (SvLEN (sv) > SvCUR (sv) + 1)
…		…
94	SvPV_renew (sv, SvCUR (sv) + 1);	200	SvPV_renew (sv, SvCUR (sv) + 1);
95	#endif	201	#endif
96	}	202	}
97	}	203	}
98		204
99	/////////////////////////////////////////////////////////////////////////////	205	// minimum length of a string to be registered for stringref
100	// fp hell	206	ecb_inline int
101		207	minimum_string_length (UV idx)
102	//TODO	208	{
		209	return idx <= 23 ? 3
		210	: idx <= 0xffU ? 4
		211	: idx <= 0xffffU ? 5
		212	: idx <= 0xffffffffU ? 7
		213	: 11;
		214	}
103		215
104	/////////////////////////////////////////////////////////////////////////////	216	/////////////////////////////////////////////////////////////////////////////
105	// encoder	217	// encoder
106		218
107	// structure used for encoding CBOR	219	// structure used for encoding CBOR
…		…
110	char *cur; // SvPVX (sv) + current output position	222	char *cur; // SvPVX (sv) + current output position
111	char *end; // SvEND (sv)	223	char *end; // SvEND (sv)
112	SV *sv; // result scalar	224	SV *sv; // result scalar
113	CBOR cbor;	225	CBOR cbor;
114	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;
115	} enc_t;	231	} enc_t;
116		232
117	INLINE void	233	ecb_inline void
118	need (enc_t *enc, STRLEN len)	234	need (enc_t *enc, STRLEN len)
119	{	235	{
120	if (expect_false (enc->cur + len >= enc->end))	236	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
121	{	237	{
122	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	238	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
123	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	239	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
124	enc->cur = SvPVX (enc->sv) + cur;	240	enc->cur = SvPVX (enc->sv) + cur;
125	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	241	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
126	}	242	}
127	}	243	}
128		244
129	INLINE void	245	static void encode_sv (enc_t *enc, SV *sv);
		246
		247	ecb_inline void
130	encode_ch (enc_t *enc, char ch)	248	encode_ch (enc_t *enc, char ch)
131	{	249	{
132	need (enc, 1);	250	need (enc, 1);
133	*enc->cur++ = ch;	251	*enc->cur++ = ch;
134	}	252	}
135		253
		254	// used for tags, intregers, element counts and so on
136	static void	255	static void
137	encode_uint (enc_t *enc, int major, UV len)	256	encode_uint (enc_t *enc, int major, UV len)
138	{	257	{
139	need (enc, 9);	258	need (enc, 9);
140		259
141	if (len < 24)	260	if (ecb_expect_true (len < LENGTH_EXT1))
142	*enc->cur++ = major | len;	261	*enc->cur++ = major | len;
143	else if (len < 0x100)	262	else if (ecb_expect_true (len <= 0xffU))
144	{	263	{
145	*enc->cur++ = major | 24;	264	*enc->cur++ = major | LENGTH_EXT1;
146	*enc->cur++ = len;	265	*enc->cur++ = len;
147	}	266	}
148	else if (len < 0x10000)	267	else if (len <= 0xffffU)
149	{	268	{
150	*enc->cur++ = major | 25;	269	*enc->cur++ = major | LENGTH_EXT2;
151	*enc->cur++ = len >> 8;	270	*enc->cur++ = len >> 8;
152	*enc->cur++ = len;	271	*enc->cur++ = len;
153	}	272	}
154	else if (len < 0x100000000)	273	else if (len <= 0xffffffffU)
155	{	274	{
156	*enc->cur++ = major | 26;	275	*enc->cur++ = major | LENGTH_EXT4;
157	*enc->cur++ = len >> 24;	276	*enc->cur++ = len >> 24;
158	*enc->cur++ = len >> 16;	277	*enc->cur++ = len >> 16;
159	*enc->cur++ = len >> 8;	278	*enc->cur++ = len >> 8;
160	*enc->cur++ = len;	279	*enc->cur++ = len;
161	}	280	}
162	else if (len)	281	else
163	{	282	{
164	*enc->cur++ = major | 27;	283	*enc->cur++ = major | LENGTH_EXT8;
165	*enc->cur++ = len >> 56;	284	*enc->cur++ = len >> 56;
166	*enc->cur++ = len >> 48;	285	*enc->cur++ = len >> 48;
167	*enc->cur++ = len >> 40;	286	*enc->cur++ = len >> 40;
168	*enc->cur++ = len >> 32;	287	*enc->cur++ = len >> 32;
169	*enc->cur++ = len >> 24;	288	*enc->cur++ = len >> 24;
…		…
171	*enc->cur++ = len >> 8;	290	*enc->cur++ = len >> 8;
172	*enc->cur++ = len;	291	*enc->cur++ = len;
173	}	292	}
174	}	293	}
175		294
176	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
177	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	315	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
178	{	316	{
179	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);
180	need (enc, len);	347	need (enc, len);
181	memcpy (enc->cur, str, len);	348	memcpy (enc->cur, str, len);
182	enc->cur += len;	349	enc->cur += len;
183	}	350	}
184		351
185	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	}
186		507
187	static void	508	static void
188	encode_av (enc_t *enc, AV *av)	509	encode_av (enc_t *enc, AV *av)
189	{	510	{
190	int i, len = av_len (av);	511	int i, len = av_len (av);
…		…
192	if (enc->depth >= enc->cbor.max_depth)	513	if (enc->depth >= enc->cbor.max_depth)
193	croak (ERR_NESTING_EXCEEDED);	514	croak (ERR_NESTING_EXCEEDED);
194		515
195	++enc->depth;	516	++enc->depth;
196		517
197	encode_uint (enc, 0x80, len + 1);	518	encode_uint (enc, MAJOR_ARRAY, len + 1);
198		519
		520	if (ecb_expect_false (SvMAGICAL (av)))
199	for (i = 0; i <= len; ++i)	521	for (i = 0; i <= len; ++i)
200	{	522	{
201	SV **svp = av_fetch (av, i, 0);	523	SV **svp = av_fetch (av, i, 0);
202	encode_sv (enc, svp ? *svp : &PL_sv_undef);	524	encode_sv (enc, svp ? *svp : &PL_sv_undef);
203	}	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	}
204		532
205	--enc->depth;	533	--enc->depth;
206	}	534	}
207		535
208	static void	536	static void
…		…
216	++enc->depth;	544	++enc->depth;
217		545
218	int pairs = hv_iterinit (hv);	546	int pairs = hv_iterinit (hv);
219	int mg = SvMAGICAL (hv);	547	int mg = SvMAGICAL (hv);
220		548
221	if (mg)	549	if (ecb_expect_false (mg))
222	encode_ch (enc, 0xa0 | 31);	550	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
223	else	551	else
224	encode_uint (enc, 0xa0, pairs);	552	encode_uint (enc, MAJOR_MAP, pairs);
225		553
226	while ((he = hv_iternext (hv)))	554	while ((he = hv_iternext (hv)))
227	{	555	{
228	if (HeKLEN (he) == HEf_SVKEY)	556	if (HeKLEN (he) == HEf_SVKEY)
229	encode_sv (enc, HeSVKEY (he));	557	encode_sv (enc, HeSVKEY (he));
230	else	558	else
231	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));
232		560
233	encode_sv (enc, expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	561	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
234	}	562	}
235		563
236	if (mg)	564	if (ecb_expect_false (mg))
237	encode_ch (enc, 0xe0 | 31);	565	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
238		566
239	--enc->depth;	567	--enc->depth;
240	}	568	}
241		569
242	// encode objects, arrays and special \0=false and \1=true values.	570	// encode objects, arrays and special \0=false and \1=true values.
243	static void	571	static void
244	encode_rv (enc_t *enc, SV *sv)	572	encode_rv (enc_t *enc, SV *sv)
245	{	573	{
246	svtype svt;
247
248	SvGETMAGIC (sv);	574	SvGETMAGIC (sv);
		575
249	svt = SvTYPE (sv);	576	svtype svt = SvTYPE (sv);
250		577
251	if (expect_false (SvOBJECT (sv)))	578	if (ecb_expect_false (SvOBJECT (sv)))
252	{	579	{
253	HV *stash = !CBOR_SLOW || cbor_boolean_stash	580	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
254	? cbor_boolean_stash	581	? types_boolean_stash
		582	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		583	HV *error_stash = !CBOR_SLOW || types_error_stash
		584	? types_error_stash
		585	: gv_stashpv ("Types::Serialiser::Error", 1);
		586	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		587	? cbor_tagged_stash
255	: gv_stashpv ("CBOR::XS::Boolean", 1);	588	: gv_stashpv ("CBOR::XS::Tagged" , 1);
256		589
257	if (SvSTASH (sv) == stash)	590	HV *stash = SvSTASH (sv);
258	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	591
		592	if (stash == boolean_stash)
		593	{
		594	encode_bool (enc, SvIV (sv));
		595	return;
		596	}
		597	else if (stash == error_stash)
		598	{
		599	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		600	return;
		601	}
		602	else if (stash == tagged_stash)
		603	{
		604	if (svt != SVt_PVAV)
		605	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		606
		607	switch (av_len ((AV *)sv))
		608	{
		609	case 2-1:
		610	// actually a tagged value
		611	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 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))
		637	{
		638	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		639	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		640	return;
		641	}
259	else	642	else
260	{	643	{
261	#if 0 //TODO	644	sv_setuv (*svp, enc->shareable_idx);
262	if (enc->cbor.flags & F_CONV_BLESSED)	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))));
		658	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
263	{	659	{
		660	dSP;
		661
		662	ENTER; SAVETMPS;
		663	PUSHMARK (SP);
264	// 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
265	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
266
267	if (to_cbor)
268	{
269	dSP;
270
271	ENTER; SAVETMPS; PUSHMARK (SP);
272	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	665	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
273		666
274	// calling with G_SCALAR ensures that we always get a 1 return value
275	PUTBACK;	667	PUTBACK;
		668	// G_SCALAR ensures that return value is 1
276	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	669	call_sv ((SV *)GvCV (method), G_SCALAR);
277	SPAGAIN;	670	SPAGAIN;
278		671
279	// catch this surprisingly common error	672	// catch this surprisingly common error
280	if (SvROK (TOPs) && SvRV (TOPs) == sv)	673	if (SvROK (TOPs) && SvRV (TOPs) == sv)
281	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	674	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
282		675
283	sv = POPs;
284	PUTBACK;
285
286	encode_sv (enc, sv);	676	encode_sv (enc, POPs);
287		677
		678	PUTBACK;
		679
288	FREETMPS; LEAVE;	680	FREETMPS; LEAVE;
289	}	681	}
290	else if (enc->cbor.flags & F_ALLOW_BLESSED)	682	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
291	encode_str (enc, "null", 4, 0);	683	{
292	else	684	dSP;
293	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it",	685
294	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	686	ENTER; SAVETMPS;
		687	PUSHMARK (SP);
		688	EXTEND (SP, 2);
		689	// we re-bless the reference to get overload and other niceties right
		690	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		691	PUSHs (sv_cbor);
		692
		693	PUTBACK;
		694	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		695	SPAGAIN;
		696
		697	// catch this surprisingly common error
		698	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		699	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		700
		701	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		702	encode_uint (enc, MAJOR_ARRAY, count + 1);
		703	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		704
		705	{
		706	int i;
		707
		708	for (i = 0; i < count; ++i)
		709	encode_sv (enc, SP[i + 1 - count]);
		710
		711	SP -= count;
295	}	712	}
296	else if (enc->cbor.flags & F_ALLOW_BLESSED)	713
297	encode_str (enc, "null", 4, 0);	714	PUTBACK;
		715
		716	FREETMPS; LEAVE;
		717	}
298	else	718	else
299	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	719	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
300	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	720	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
301	#endif
302	}
303	}	721	}
304	else if (svt == SVt_PVHV)	722	else if (svt == SVt_PVHV)
305	encode_hv (enc, (HV *)sv);	723	encode_hv (enc, (HV *)sv);
306	else if (svt == SVt_PVAV)	724	else if (svt == SVt_PVAV)
307	encode_av (enc, (AV *)sv);	725	encode_av (enc, (AV *)sv);
308	else if (svt < SVt_PVAV)
309	{
310	STRLEN len = 0;
311	char *pv = svt ? SvPV (sv, len) : 0;
312
313	if (len == 1 && *pv == '1')
314	encode_ch (enc, 0xe0 | 21);
315	else if (len == 1 && *pv == '0')
316	encode_ch (enc, 0xe0 | 20);
317	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
318	encode_ch (enc, 0xe0 | 23);
319	else
320	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
321	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
322	}
323	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
324	encode_ch (enc, 0xe0 | 23);
325	else	726	else
326	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	727	{
327	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	728	encode_tag (enc, CBOR_TAG_INDIRECTION);
		729	encode_sv (enc, sv);
		730	}
328	}	731	}
329		732
330	static void	733	static void
331	encode_nv (enc_t *enc, SV *sv)	734	encode_nv (enc_t *enc, SV *sv)
332	{	735	{
333	double nv = SvNVX (sv);	736	double nv = SvNVX (sv);
334		737
335	need (enc, 9);	738	need (enc, 9);
336		739
337	if (expect_false (nv == (U32)nv))	740	if (ecb_expect_false (nv == (NV)(U32)nv))
338	encode_uint (enc, 0x00, (U32)nv);	741	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
339	//TODO: maybe I32?	742	//TODO: maybe I32?
340	else if (expect_false (nv == (float)nv))	743	else if (ecb_expect_false (nv == (float)nv))
341	{	744	encode_float32 (enc, nv);
342	uint32_t fp = ecb_float_to_binary32 (nv);
343
344	*enc->cur++ = 0xe0 | 26;
345
346	if (!ecb_big_endian ())
347	fp = ecb_bswap32 (fp);
348
349	memcpy (enc->cur, &fp, 4);
350	enc->cur += 4;
351	}
352	else	745	else
353	{	746	encode_float64 (enc, nv);
354	uint64_t fp = ecb_double_to_binary64 (nv);
355
356	*enc->cur++ = 0xe0 | 27;
357
358	if (!ecb_big_endian ())
359	fp = ecb_bswap64 (fp);
360
361	memcpy (enc->cur, &fp, 8);
362	enc->cur += 8;
363	}
364	}	747	}
365		748
366	static void	749	static void
367	encode_sv (enc_t *enc, SV *sv)	750	encode_sv (enc_t *enc, SV *sv)
368	{	751	{
…		…
370		753
371	if (SvPOKp (sv))	754	if (SvPOKp (sv))
372	{	755	{
373	STRLEN len;	756	STRLEN len;
374	char *str = SvPV (sv, len);	757	char *str = SvPV (sv, len);
375	encode_str (enc, SvUTF8 (sv), str, len);	758	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
376	}	759	}
377	else if (SvNOKp (sv))	760	else if (SvNOKp (sv))
378	encode_nv (enc, sv);	761	encode_nv (enc, sv);
379	else if (SvIOKp (sv))	762	else if (SvIOKp (sv))
380	{	763	encode_int (enc, sv);
381	if (SvIsUV (sv))
382	encode_uint (enc, 0x00, SvUVX (sv));
383	else if (SvIVX (sv) >= 0)
384	encode_uint (enc, 0x00, SvIVX (sv));
385	else
386	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
387	}
388	else if (SvROK (sv))	764	else if (SvROK (sv))
389	encode_rv (enc, SvRV (sv));	765	encode_rv (enc, SvRV (sv));
390	else if (!SvOK (sv))	766	else if (!SvOK (sv))
391	encode_ch (enc, 0xe0 | 22);	767	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
392	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	768	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
393	encode_ch (enc, 0xe0 | 23);	769	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
394	else	770	else
395	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",
396	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	772	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
397	}	773	}
398		774
399	static SV *	775	static SV *
400	encode_cbor (SV *scalar, CBOR *cbor)	776	encode_cbor (SV *scalar, CBOR *cbor)
401	{	777	{
402	enc_t enc;	778	enc_t enc = { 0 };
403		779
404	enc.cbor = *cbor;	780	enc.cbor = *cbor;
405	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	781	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
406	enc.cur = SvPVX (enc.sv);	782	enc.cur = SvPVX (enc.sv);
407	enc.end = SvEND (enc.sv);	783	enc.end = SvEND (enc.sv);
408	enc.depth = 0;
409		784
410	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
411	encode_sv (&enc, scalar);	794	encode_sv (&enc, scalar);
412		795
413	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	796	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
414	*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
415		798
…		…
429	U8 *end; // end of input string	812	U8 *end; // end of input string
430	const char *err; // parse error, if != 0	813	const char *err; // parse error, if != 0
431	CBOR cbor;	814	CBOR cbor;
432	U32 depth; // recursion depth	815	U32 depth; // recursion depth
433	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
434	} dec_t;	821	} dec_t;
435		822
436	#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);
437		830
438	#define WANT(len) if (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;
439		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
440	#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)
441	#define DEC_DEC_DEPTH --dec->depth	860	#define DEC_DEC_DEPTH --dec->depth
442		861
443	static UV	862	static UV
444	decode_uint (dec_t *dec)	863	decode_uint (dec_t *dec)
445	{	864	{
446	switch (*dec->cur & 31)	865	U8 m = *dec->cur & MINOR_MASK;
447	{	866	++dec->cur;
448	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
449	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
450	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
451	return *dec->cur++ & 31;
452		867
453	case 24:	868	if (ecb_expect_true (m < LENGTH_EXT1))
		869	return m;
		870	else if (ecb_expect_true (m == LENGTH_EXT1))
		871	{
454	WANT (2);	872	WANT (1);
455	dec->cur += 2;	873	dec->cur += 1;
456	return dec->cur[-1];	874	return dec->cur[-1];
457		875	}
458	case 25:	876	else if (ecb_expect_true (m == LENGTH_EXT2))
		877	{
459	WANT (3);	878	WANT (2);
460	dec->cur += 3;	879	dec->cur += 2;
461	return (((UV)dec->cur[-2]) << 8)	880	return (((UV)dec->cur[-2]) << 8)
462	| ((UV)dec->cur[-1]);	881	| ((UV)dec->cur[-1]);
463		882	}
464	case 26:	883	else if (ecb_expect_true (m == LENGTH_EXT4))
		884	{
465	WANT (5);	885	WANT (4);
466	dec->cur += 5;	886	dec->cur += 4;
467	return (((UV)dec->cur[-4]) << 24)	887	return (((UV)dec->cur[-4]) << 24)
468	| (((UV)dec->cur[-3]) << 16)	888	| (((UV)dec->cur[-3]) << 16)
469	| (((UV)dec->cur[-2]) << 8)	889	| (((UV)dec->cur[-2]) << 8)
470	| ((UV)dec->cur[-1]);	890	| ((UV)dec->cur[-1]);
471		891	}
472	case 27:	892	else if (ecb_expect_true (m == LENGTH_EXT8))
		893	{
473	WANT (9);	894	WANT (8);
474	dec->cur += 9;	895	dec->cur += 8;
		896
		897	return
		898	#if UVSIZE < 8
		899	0
		900	#else
475	return (((UV)dec->cur[-8]) << 56)	901	(((UV)dec->cur[-8]) << 56)
476	| (((UV)dec->cur[-7]) << 48)	902	| (((UV)dec->cur[-7]) << 48)
477	| (((UV)dec->cur[-6]) << 40)	903	| (((UV)dec->cur[-6]) << 40)
478	| (((UV)dec->cur[-5]) << 32)	904	| (((UV)dec->cur[-5]) << 32)
		905	#endif
479	| (((UV)dec->cur[-4]) << 24)	906	| (((UV)dec->cur[-4]) << 24)
480	| (((UV)dec->cur[-3]) << 16)	907	| (((UV)dec->cur[-3]) << 16)
481	| (((UV)dec->cur[-2]) << 8)	908	| (((UV)dec->cur[-2]) << 8)
482	| ((UV)dec->cur[-1]);	909	| ((UV)dec->cur[-1]);
483		910	}
484	default:	911	else
485	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	912	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
486	}
487		913
488	fail:	914	fail:
489	return 0;	915	return 0;
490	}	916	}
491		917
…		…
496	{	922	{
497	AV *av = newAV ();	923	AV *av = newAV ();
498		924
499	DEC_INC_DEPTH;	925	DEC_INC_DEPTH;
500		926
501	if ((*dec->cur & 31) == 31)	927	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
502	{	928	{
503	++dec->cur;	929	++dec->cur;
504		930
505	for (;;)	931	for (;;)
506	{	932	{
507	WANT (1);	933	WANT (1);
508		934
509	if (*dec->cur == 0xe0 | 31)	935	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
510	{	936	{
511	++dec->cur;	937	++dec->cur;
512	break;	938	break;
513	}	939	}
514		940
515	av_push (av, decode_sv (dec));	941	av_push (av, decode_sv (dec));
516	}	942	}
517	}	943	}
518	else	944	else
519	{	945	{
520	int i, len = decode_uint (dec);	946	UV i, len = decode_uint (dec);
521		947
		948	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
522	av_fill (av, len - 1);	949	av_fill (av, len - 1);
523		950
524	for (i = 0; i < len; ++i)	951	for (i = 0; i < len; ++i)
525	AvARRAY (av)[i] = decode_sv (dec);	952	AvARRAY (av)[i] = decode_sv (dec);
526	}	953	}
527		954
528	DEC_DEC_DEPTH;	955	DEC_DEC_DEPTH;
529	return newRV_noinc ((SV *)av);	956	return newRV_noinc ((SV *)av);
530		957
531	fail:	958	fail:
532	SvREFCNT_dec (av);	959	SvREFCNT_dec_NN (av);
533	DEC_DEC_DEPTH;	960	DEC_DEC_DEPTH;
534	return &PL_sv_undef;	961	return &PL_sv_undef;
535	}	962	}
536		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 (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
537	static SV *	1038	static SV *
538	decode_hv (dec_t *dec)	1039	decode_hv (dec_t *dec)
539	{	1040	{
540	HV *hv = newHV ();	1041	HV *hv = newHV ();
541		1042
542	DEC_INC_DEPTH;	1043	DEC_INC_DEPTH;
543		1044
544	if ((*dec->cur & 31) == 31)	1045	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
545	{	1046	{
546	++dec->cur;	1047	++dec->cur;
547		1048
548	for (;;)	1049	for (;;)
549	{	1050	{
550	WANT (1);	1051	WANT (1);
551		1052
552	if (*dec->cur == 0xe0 | 31)	1053	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
553	{	1054	{
554	++dec->cur;	1055	++dec->cur;
555	break;	1056	break;
556	}	1057	}
557		1058
558	SV *k = decode_sv (dec);	1059	decode_he (dec, hv);
559	SV *v = decode_sv (dec);
560
561	hv_store_ent (hv, k, v, 0);
562	}	1060	}
563	}	1061	}
564	else	1062	else
565	{	1063	{
566	int len = decode_uint (dec);	1064	UV pairs = decode_uint (dec);
567		1065
		1066	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1067
568	while (len--)	1068	while (pairs--)
569	{	1069	decode_he (dec, hv);
570	SV *k = decode_sv (dec);
571	SV *v = decode_sv (dec);
572
573	hv_store_ent (hv, k, v, 0);
574	}
575	}	1070	}
576		1071
577	DEC_DEC_DEPTH;	1072	DEC_DEC_DEPTH;
578	return newRV_noinc ((SV *)hv);	1073	return newRV_noinc ((SV *)hv);
579		1074
580	#if 0	1075	fail:
581	SV *sv;	1076	SvREFCNT_dec_NN (hv);
582	HV *hv = newHV ();
583
584	DEC_INC_DEPTH;	1077	DEC_DEC_DEPTH;
585	decode_ws (dec);	1078	return &PL_sv_undef;
		1079	}
586		1080
587	for (;;)	1081	static SV *
588	{	1082	decode_str (dec_t *dec, int utf8)
589	// heuristic: assume that	1083	{
590	// a) decode_str + hv_store_ent are abysmally slow.	1084	SV *sv = 0;
591	// b) most hash keys are short, simple ascii text.	1085
592	// => try to "fast-match" such strings to avoid	1086	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
593	// the overhead of decode_str + hv_store_ent.
594	{	1087	{
595	SV *value;	1088	// indefinite length strings
596	char *p = dec->cur;	1089	++dec->cur;
597	char *e = p + 24; // only try up to 24 bytes
598		1090
		1091	U8 major = *dec->cur & MAJOR_MISC;
		1092
		1093	sv = newSVpvn ("", 0);
		1094
599	for (;;)	1095	for (;;)
600	{	1096	{
601	// the >= 0x80 is false on most architectures	1097	WANT (1);
602	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')	1098
		1099	if ((*dec->cur - major) > LENGTH_EXT8)
		1100	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
603	{	1101	{
604	// slow path, back up and use decode_str	1102	++dec->cur;
605	SV *key = decode_str (dec);
606	if (!key)
607	goto fail;
608
609	decode_ws (dec); EXPECT_CH (':');
610
611	decode_ws (dec);
612	value = decode_sv (dec);
613	if (!value)
614	{
615	SvREFCNT_dec (key);
616	goto fail;
617	}
618
619	hv_store_ent (hv, key, value, 0);
620	SvREFCNT_dec (key);
621
622	break;	1103	break;
623	}	1104	}
624	else if (*p == '"')
625	{
626	// fast path, got a simple key
627	char *key = dec->cur;
628	int len = p - key;
629	dec->cur = p + 1;
630
631	decode_ws (dec); EXPECT_CH (':');
632
633	decode_ws (dec);
634	value = decode_sv (dec);
635	if (!value)
636	goto fail;
637
638	hv_store (hv, key, len, value, 0);
639
640	break;
641	}
642
643	++p;
644	}
645	}
646
647	decode_ws (dec);
648
649	if (*dec->cur == '}')
650	{
651	++dec->cur;
652	break;
653	}
654
655	if (*dec->cur != ',')
656	ERR (", or } expected while parsing object/hash");
657
658	++dec->cur;
659
660	decode_ws (dec);
661
662	if (*dec->cur == '}' && dec->cbor.flags & F_RELAXED)
663	{
664	++dec->cur;
665	break;
666	}
667	}
668
669	DEC_DEC_DEPTH;
670	sv = newRV_noinc ((SV *)hv);
671
672	// check filter callbacks
673	if (dec->cbor.flags & F_HOOK)
674	{
675	if (dec->cbor.cb_sk_object && HvKEYS (hv) == 1)
676	{
677	HE *cb, *he;
678
679	hv_iterinit (hv);
680	he = hv_iternext (hv);
681	hv_iterinit (hv);
682
683	// the next line creates a mortal sv each time its called.
684	// might want to optimise this for common cases.
685	cb = hv_fetch_ent (dec->cbor.cb_sk_object, hv_iterkeysv (he), 0, 0);
686
687	if (cb)
688	{	1105	else
689	dSP;	1106	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
690	int count;
691		1107
692	ENTER; SAVETMPS; PUSHMARK (SP);	1108	STRLEN len = decode_uint (dec);
693	XPUSHs (HeVAL (he));
694	sv_2mortal (sv);
695		1109
696	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
697
698	if (count == 1)
699	{
700	sv = newSVsv (POPs);
701	FREETMPS; LEAVE;
702	return sv;
703	}
704
705	SvREFCNT_inc (sv);
706	FREETMPS; LEAVE;
707	}
708	}
709
710	if (dec->cbor.cb_object)
711	{
712	dSP;
713	int count;
714
715	ENTER; SAVETMPS; PUSHMARK (SP);
716	XPUSHs (sv_2mortal (sv));
717
718	PUTBACK; count = call_sv (dec->cbor.cb_object, G_ARRAY); SPAGAIN;
719
720	if (count == 1)
721	{
722	sv = newSVsv (POPs);
723	FREETMPS; LEAVE;
724	return sv;
725	}
726
727	SvREFCNT_inc (sv);
728	FREETMPS; LEAVE;
729	}
730	}
731
732	return sv;
733	#endif
734
735	fail:
736	SvREFCNT_dec (hv);
737	DEC_DEC_DEPTH;
738	return &PL_sv_undef;
739	}
740
741	static SV *
742	decode_str (dec_t *dec, int utf8)
743	{
744	SV *sv;
745
746	if ((*dec->cur & 31) == 31)
747	{
748	++dec->cur;
749
750	sv = newSVpvn ("", 0);
751
752	// not very fast, and certainly not robust against illegal input
753	for (;;)
754	{
755	WANT (1);	1110	WANT (len);
756		1111	sv_catpvn (sv, dec->cur, len);
757	if (*dec->cur == 0xe0 | 31)	1112	dec->cur += len;
758	{
759	++dec->cur;
760	break;
761	}
762
763	SV *sv2 = decode_sv (dec);
764	sv_catsv (sv, sv2);
765	}	1113	}
766	}	1114	}
767	else	1115	else
768	{	1116	{
769	STRLEN len = decode_uint (dec);	1117	STRLEN len = decode_uint (dec);
770		1118
771	WANT (len);	1119	WANT (len);
772	sv = newSVpvn (dec->cur, len);	1120	sv = newSVpvn (dec->cur, len);
773	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));
774	}	1126	}
775		1127
776	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
777	SvUTF8_on (sv);	1134	SvUTF8_on (sv);
		1135	}
778		1136
779	return sv;	1137	return sv;
780		1138
781	fail:	1139	fail:
		1140	SvREFCNT_dec (sv);
		1141	return &PL_sv_undef;
		1142	}
		1143
		1144	static SV *
		1145	decode_tagged (dec_t *dec)
		1146	{
		1147	SV *sv = 0;
		1148	UV tag = decode_uint (dec);
		1149
		1150	WANT (1);
		1151
		1152	switch (tag)
		1153	{
		1154	case CBOR_TAG_MAGIC:
		1155	sv = decode_sv (dec);
		1156	break;
		1157
		1158	case CBOR_TAG_INDIRECTION:
		1159	sv = newRV_noinc (decode_sv (dec));
		1160	break;
		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
		1239	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1240	ERR ("corrupted CBOR data (non-array perl object)");
		1241
		1242	AV *av = (AV *)SvRV (sv);
		1243	int len = av_len (av) + 1;
		1244	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1245
		1246	if (!stash)
		1247	ERR ("cannot decode perl-object (package does not exist)");
		1248
		1249	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1250
		1251	if (!method)
		1252	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1253
		1254	dSP;
		1255
		1256	ENTER; SAVETMPS;
		1257	PUSHMARK (SP);
		1258	EXTEND (SP, len + 1);
		1259	// we re-bless the reference to get overload and other niceties right
		1260	PUSHs (*av_fetch (av, 0, 1));
		1261	PUSHs (sv_cbor);
		1262
		1263	int i;
		1264
		1265	for (i = 1; i < len; ++i)
		1266	PUSHs (*av_fetch (av, i, 1));
		1267
		1268	PUTBACK;
		1269	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1270	SPAGAIN;
		1271
		1272	if (SvTRUE (ERRSV))
		1273	{
		1274	FREETMPS; LEAVE;
		1275	ERR_ERRSV;
		1276	}
		1277
		1278	SvREFCNT_dec_NN (sv);
		1279	sv = SvREFCNT_inc (POPs);
		1280
		1281	PUTBACK;
		1282
		1283	FREETMPS; LEAVE;
		1284	}
		1285	break;
		1286
		1287	default:
		1288	filter:
		1289	{
		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	{
		1321	AV *av = newAV ();
		1322	av_push (av, tag_sv);
		1323	av_push (av, sv);
		1324
		1325	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1326	? cbor_tagged_stash
		1327	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1328	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1329	}
		1330
		1331	PUTBACK;
		1332
		1333	FREETMPS; LEAVE;
		1334	}
		1335	break;
		1336	}
		1337
		1338	return sv;
		1339
		1340	fail:
		1341	SvREFCNT_dec (sv);
782	return &PL_sv_undef;	1342	return &PL_sv_undef;
783	}	1343	}
784		1344
785	static SV *	1345	static SV *
786	decode_sv (dec_t *dec)	1346	decode_sv (dec_t *dec)
787	{	1347	{
788	WANT (1);	1348	WANT (1);
789		1349
790	switch (*dec->cur >> 5)	1350	switch (*dec->cur >> MAJOR_SHIFT)
791	{	1351	{
792	case 0: // unsigned int	1352	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
793	//TODO: 64 bit values on 3 2bit perls	1353	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
794	return newSVuv (decode_uint (dec));	1354	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
795	case 1: // negative int	1355	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
796	return newSViv (-1 - (IV)decode_uint (dec));	1356	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
797	case 2: // octet string	1357	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
798	return decode_str (dec, 0);	1358	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
799	case 3: // utf-8 string	1359
800	return decode_str (dec, 1);	1360	case MAJOR_MISC >> MAJOR_SHIFT:
801	case 4: // array
802	return decode_av (dec);
803	case 5: // map
804	return decode_hv (dec);
805	case 6: // tag
806	abort ();
807	break;
808	case 7: // misc
809	switch (*dec->cur++ & 31)	1361	switch (*dec->cur++ & MINOR_MASK)
810	{	1362	{
811	case 20:	1363	case SIMPLE_FALSE:
812	#if CBOR_SLOW	1364	#if CBOR_SLOW
813	cbor_false = get_bool ("CBOR::XS::false");	1365	types_false = get_bool ("Types::Serialiser::false");
814	#endif	1366	#endif
815	return newSVsv (cbor_false);	1367	return newSVsv (types_false);
816	case 21:	1368	case SIMPLE_TRUE:
817	#if CBOR_SLOW	1369	#if CBOR_SLOW
818	cbor_true = get_bool ("CBOR::XS::true");	1370	types_true = get_bool ("Types::Serialiser::true");
819	#endif	1371	#endif
820	return newSVsv (cbor_true);	1372	return newSVsv (types_true);
821	case 22:	1373	case SIMPLE_NULL:
822	return newSVsv (&PL_sv_undef);	1374	return newSVsv (&PL_sv_undef);
		1375	case SIMPLE_UNDEF:
		1376	#if CBOR_SLOW
		1377	types_error = get_bool ("Types::Serialiser::error");
		1378	#endif
		1379	return newSVsv (types_error);
823		1380
824	case 25:	1381	case MISC_FLOAT16:
825	// half float
826	abort ();
827	break;	1382	{
		1383	WANT (2);
828		1384
		1385	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
		1386	dec->cur += 2;
		1387
		1388	return newSVnv (ecb_binary16_to_float (fp));
		1389	}
		1390
829	case 26:	1391	case MISC_FLOAT32:
830	{	1392	{
831	uint32_t fp;	1393	uint32_t fp;
832	WANT (4);	1394	WANT (4);
833	memcpy (&fp, dec->cur, 4);	1395	memcpy (&fp, dec->cur, 4);
834	dec->cur += 4;	1396	dec->cur += 4;
…		…
837	fp = ecb_bswap32 (fp);	1399	fp = ecb_bswap32 (fp);
838		1400
839	return newSVnv (ecb_binary32_to_float (fp));	1401	return newSVnv (ecb_binary32_to_float (fp));
840	}	1402	}
841		1403
842	case 27:	1404	case MISC_FLOAT64:
843	{	1405	{
844	uint64_t fp;	1406	uint64_t fp;
845	WANT (8);	1407	WANT (8);
846	memcpy (&fp, dec->cur, 8);	1408	memcpy (&fp, dec->cur, 8);
847	dec->cur += 8;	1409	dec->cur += 8;
…		…
850	fp = ecb_bswap64 (fp);	1412	fp = ecb_bswap64 (fp);
851		1413
852	return newSVnv (ecb_binary64_to_double (fp));	1414	return newSVnv (ecb_binary64_to_double (fp));
853	}	1415	}
854		1416
855	// 0..19 unassigned	1417	// 0..19 unassigned simple
856	// 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
857	default:	1421	default:
858	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1422	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
859	}	1423	}
860		1424
861	break;	1425	break;
862	}	1426	}
863	#if 0
864	switch (*dec->cur)
865	{
866	//case '"': ++dec->cur; return decode_str (dec);
867	case '[': ++dec->cur; return decode_av (dec);
868	case '{': ++dec->cur; return decode_hv (dec);
869
870	case '-':
871	case '0': case '1': case '2': case '3': case '4':
872	case '5': case '6': case '7': case '8': case '9':
873	//TODO return decode_num (dec);
874
875	case 't':
876	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
877	{
878	dec->cur += 4;
879	#if CBOR_SLOW
880	cbor_true = get_bool ("CBOR::XS::true");
881	#endif
882	return newSVsv (cbor_true);
883	}
884	else
885	ERR ("'true' expected");
886
887	break;
888
889	case 'f':
890	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
891	{
892	dec->cur += 5;
893	#if CBOR_SLOW
894	cbor_false = get_bool ("CBOR::XS::false");
895	#endif
896	return newSVsv (cbor_false);
897	}
898	else
899	ERR ("'false' expected");
900
901	break;
902
903	case 'n':
904	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
905	{
906	dec->cur += 4;
907	return newSVsv (&PL_sv_undef);
908	}
909	else
910	ERR ("'null' expected");
911
912	break;
913
914	default:
915	ERR ("malformed CBOR string, neither array, object, number, string or atom");
916	break;
917	}
918	#endif
919		1427
920	fail:	1428	fail:
921	return &PL_sv_undef;	1429	return &PL_sv_undef;
922	}	1430	}
923		1431
924	static SV *	1432	static SV *
925	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1433	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
926	{	1434	{
927	dec_t dec;	1435	dec_t dec = { 0 };
928	SV *sv;	1436	SV *sv;
		1437	STRLEN len;
		1438	char *data = SvPVbyte (string, len);
929		1439
930	/* work around bugs in 5.10 where manipulating magic values
931	* makes perl ignore the magic in subsequent accesses.
932	* also make a copy of non-PV values, to get them into a clean
933	* state (SvPV should do that, but it's buggy, see below).
934	*/
935	/*SvGETMAGIC (string);*/
936	if (SvMAGICAL (string) || !SvPOK (string))
937	string = sv_2mortal (newSVsv (string));
938
939	SvUPGRADE (string, SVt_PV);
940
941	/* work around a bug in perl 5.10, which causes SvCUR to fail an
942	* assertion with -DDEBUGGING, although SvCUR is documented to
943	* return the xpv_cur field which certainly exists after upgrading.
944	* according to nicholas clark, calling SvPOK fixes this.
945	* But it doesn't fix it, so try another workaround, call SvPV_nolen
946	* and hope for the best.
947	* Damnit, SvPV_nolen still trips over yet another assertion. This
948	* assertion business is seriously broken, try yet another workaround
949	* for the broken -DDEBUGGING.
950	*/
951	{
952	#ifdef DEBUGGING
953	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
954	#else
955	STRLEN offset = SvCUR (string);
956	#endif
957
958	if (offset > cbor->max_size && cbor->max_size)	1440	if (len > cbor->max_size && cbor->max_size)
959	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",
960	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1442	(unsigned long)len, (unsigned long)cbor->max_size);
961	}
962
963	sv_utf8_downgrade (string, 0);
964		1443
965	dec.cbor = *cbor;	1444	dec.cbor = *cbor;
966	dec.cur = (U8 *)SvPVX (string);	1445	dec.cur = (U8 *)data;
967	dec.end = (U8 *)SvEND (string);	1446	dec.end = (U8 *)data + len;
968	dec.err = 0;
969	dec.depth = 0;
970
971	if (dec.cbor.cb_object || dec.cbor.cb_sk_object)
972	;//TODO dec.cbor.flags |= F_HOOK;
973		1447
974	sv = decode_sv (&dec);	1448	sv = decode_sv (&dec);
975		1449
976	if (offset_return)	1450	if (offset_return)
977	*offset_return = dec.cur;	1451	*offset_return = dec.cur;
978		1452
979	if (!(offset_return || !sv))	1453	if (!(offset_return || !sv))
980	{
981	if (*dec.cur && !dec.err)	1454	if (dec.cur != dec.end && !dec.err)
982	{
983	dec.err = "garbage after CBOR object";	1455	dec.err = "garbage after CBOR object";
984	SvREFCNT_dec (sv);	1456
985	sv = 0;	1457	if (dec.err)
		1458	{
		1459	if (dec.shareable)
986	}	1460	{
987	}	1461	// need to break cyclic links, which would all be in shareable
		1462	int i;
		1463	SV **svp;
988		1464
989	if (!sv)	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
		1470	SvREFCNT_dec_NN (sv);
		1471
		1472	if (dec.err_sv)
		1473	sv_2mortal (dec.err_sv);
		1474
990	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);
		1476	}
991		1477
992	sv = sv_2mortal (sv);	1478	sv = sv_2mortal (sv);
993		1479
994	return sv;	1480	return sv;
995	}	1481	}
996		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	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1575	if (len)
		1576	{
		1577	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1578	count = len + 1;
		1579	}
		1580	break;
		1581	}
		1582	}
		1583	}
		1584	}
		1585
		1586	self->incr_pos = self->incr_need;
		1587
		1588	if (count > 0)
		1589	{
		1590	while (!--count)
		1591	{
		1592	if (!AvFILLp (self->incr_count))
		1593	return 1; // done
		1594
		1595	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1596	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1597	}
		1598
		1599	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1600	}
		1601	}
		1602
		1603	return 0;
		1604	}
		1605
		1606
997	/////////////////////////////////////////////////////////////////////////////	1607	/////////////////////////////////////////////////////////////////////////////
998	// XS interface functions	1608	// XS interface functions
999		1609
1000	MODULE = CBOR::XS PACKAGE = CBOR::XS	1610	MODULE = CBOR::XS PACKAGE = CBOR::XS
1001		1611
1002	BOOT:	1612	BOOT:
1003	{	1613	{
1004	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1614	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1005	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1615	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1006		1616
1007	cbor_true = get_bool ("CBOR::XS::true");	1617	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1008	cbor_false = get_bool ("CBOR::XS::false");	1618	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1619
		1620	types_true = get_bool ("Types::Serialiser::true" );
		1621	types_false = get_bool ("Types::Serialiser::false");
		1622	types_error = get_bool ("Types::Serialiser::error");
		1623
		1624	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1625
		1626	sv_cbor = newSVpv ("CBOR", 0);
		1627	SvREADONLY_on (sv_cbor);
		1628
		1629	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
1009	}	1630	}
1010		1631
1011	PROTOTYPES: DISABLE	1632	PROTOTYPES: DISABLE
1012		1633
1013	void CLONE (...)	1634	void CLONE (...)
1014	CODE:	1635	CODE:
1015	cbor_stash = 0;	1636	cbor_stash = 0;
		1637	cbor_tagged_stash = 0;
		1638	types_error_stash = 0;
1016	cbor_boolean_stash = 0;	1639	types_boolean_stash = 0;
1017		1640
1018	void new (char *klass)	1641	void new (char *klass)
1019	PPCODE:	1642	PPCODE:
1020	{	1643	{
1021	SV *pv = NEWSV (0, sizeof (CBOR));	1644	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1029		1652
1030	void shrink (CBOR *self, int enable = 1)	1653	void shrink (CBOR *self, int enable = 1)
1031	ALIAS:	1654	ALIAS:
1032	shrink = F_SHRINK	1655	shrink = F_SHRINK
1033	allow_unknown = F_ALLOW_UNKNOWN	1656	allow_unknown = F_ALLOW_UNKNOWN
		1657	allow_sharing = F_ALLOW_SHARING
		1658	allow_cycles = F_ALLOW_CYCLES
		1659	forbid_objects = F_FORBID_OBJECTS
		1660	pack_strings = F_PACK_STRINGS
		1661	text_keys = F_TEXT_KEYS
		1662	text_strings = F_TEXT_STRINGS
		1663	validate_utf8 = F_VALIDATE_UTF8
1034	PPCODE:	1664	PPCODE:
1035	{	1665	{
1036	if (enable)	1666	if (enable)
1037	self->flags |= ix;	1667	self->flags |= ix;
1038	else	1668	else
…		…
1043		1673
1044	void get_shrink (CBOR *self)	1674	void get_shrink (CBOR *self)
1045	ALIAS:	1675	ALIAS:
1046	get_shrink = F_SHRINK	1676	get_shrink = F_SHRINK
1047	get_allow_unknown = F_ALLOW_UNKNOWN	1677	get_allow_unknown = F_ALLOW_UNKNOWN
		1678	get_allow_sharing = F_ALLOW_SHARING
		1679	get_allow_cycles = F_ALLOW_CYCLES
		1680	get_forbid_objects = F_FORBID_OBJECTS
		1681	get_pack_strings = F_PACK_STRINGS
		1682	get_text_keys = F_TEXT_KEYS
		1683	get_text_strings = F_TEXT_STRINGS
		1684	get_validate_utf8 = F_VALIDATE_UTF8
1048	PPCODE:	1685	PPCODE:
1049	XPUSHs (boolSV (self->flags & ix));	1686	XPUSHs (boolSV (self->flags & ix));
1050		1687
1051	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1688	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1052	PPCODE:	1689	PPCODE:
…		…
1068	CODE:	1705	CODE:
1069	RETVAL = self->max_size;	1706	RETVAL = self->max_size;
1070	OUTPUT:	1707	OUTPUT:
1071	RETVAL	1708	RETVAL
1072		1709
1073	#if 0 //TODO	1710	void filter (CBOR *self, SV *filter = 0)
1074
1075	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1076	PPCODE:	1711	PPCODE:
1077	{
1078	SvREFCNT_dec (self->cb_object);	1712	SvREFCNT_dec (self->filter);
1079	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1713	self->filter = filter ? newSVsv (filter) : filter;
1080
1081	XPUSHs (ST (0));	1714	XPUSHs (ST (0));
1082	}
1083		1715
1084	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1716	SV *get_filter (CBOR *self)
1085	PPCODE:	1717	CODE:
1086	{	1718	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1087	if (!self->cb_sk_object)	1719	OUTPUT:
1088	self->cb_sk_object = newHV ();	1720	RETVAL
1089
1090	if (SvOK (cb))
1091	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1092	else
1093	{
1094	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1095
1096	if (!HvKEYS (self->cb_sk_object))
1097	{
1098	SvREFCNT_dec (self->cb_sk_object);
1099	self->cb_sk_object = 0;
1100	}
1101	}
1102
1103	XPUSHs (ST (0));
1104	}
1105
1106	#endif
1107		1721
1108	void encode (CBOR *self, SV *scalar)	1722	void encode (CBOR *self, SV *scalar)
1109	PPCODE:	1723	PPCODE:
1110	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1724	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1111	XPUSHs (scalar);	1725	XPUSHs (scalar);
…		…
1124	EXTEND (SP, 2);	1738	EXTEND (SP, 2);
1125	PUSHs (sv);	1739	PUSHs (sv);
1126	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1740	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1127	}	1741	}
1128		1742
		1743	void incr_parse (CBOR *self, SV *cborstr)
		1744	ALIAS:
		1745	incr_parse_multiple = 1
		1746	PPCODE:
		1747	{
		1748	if (SvUTF8 (cborstr))
		1749	sv_utf8_downgrade (cborstr, 0);
		1750
		1751	if (!self->incr_count)
		1752	{
		1753	self->incr_count = newAV ();
		1754	self->incr_pos = 0;
		1755	self->incr_need = 1;
		1756
		1757	av_push (self->incr_count, newSViv (1));
		1758	}
		1759
		1760	do
		1761	{
		1762	if (!incr_parse (self, cborstr))
		1763	{
		1764	if (self->incr_need > self->max_size && self->max_size)
		1765	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1766	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1767
		1768	break;
		1769	}
		1770
		1771	SV *sv;
		1772	char *offset;
		1773
		1774	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1775	XPUSHs (sv);
		1776
		1777	sv_chop (cborstr, offset);
		1778
		1779	av_clear (self->incr_count);
		1780	av_push (self->incr_count, newSViv (1));
		1781
		1782	self->incr_pos = 0;
		1783	self->incr_need = self->incr_pos + 1;
		1784	}
		1785	while (ix);
		1786	}
		1787
		1788	void incr_reset (CBOR *self)
		1789	CODE:
		1790	{
		1791	SvREFCNT_dec (self->incr_count);
		1792	self->incr_count = 0;
		1793	}
		1794
1129	void DESTROY (CBOR *self)	1795	void DESTROY (CBOR *self)
1130	CODE:	1796	PPCODE:
1131	SvREFCNT_dec (self->cb_sk_object);	1797	cbor_free (self);
1132	SvREFCNT_dec (self->cb_object);
1133		1798
1134	PROTOTYPES: ENABLE	1799	PROTOTYPES: ENABLE
1135		1800
1136	void encode_cbor (SV *scalar)	1801	void encode_cbor (SV *scalar)
		1802	ALIAS:
		1803	encode_cbor = 0
		1804	encode_cbor_sharing = F_ALLOW_SHARING
1137	PPCODE:	1805	PPCODE:
1138	{	1806	{
1139	CBOR cbor;	1807	CBOR cbor;
1140	cbor_init (&cbor);	1808	cbor_init (&cbor);
		1809	cbor.flags |= ix;
1141	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1810	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1142	XPUSHs (scalar);	1811	XPUSHs (scalar);
1143	}	1812	}
1144		1813
1145	void decode_cbor (SV *cborstr)	1814	void decode_cbor (SV *cborstr)
…		…
1149	cbor_init (&cbor);	1818	cbor_init (&cbor);
1150	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1819	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1151	XPUSHs (cborstr);	1820	XPUSHs (cborstr);
1152	}	1821	}
1153		1822
		1823	#ifdef __AFL_COMPILER
		1824
		1825	void
		1826	afl_init ()
		1827	CODE:
		1828	__AFL_INIT ();
		1829
		1830	int
		1831	afl_loop (unsigned int count = 10000)
		1832	CODE:
		1833	RETVAL = __AFL_LOOP (count);
		1834	OUTPUT:
		1835	RETVAL
		1836
		1837	#endif
		1838

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