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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 1.69 by root, Mon Nov 30 20:38:25 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	// possibly future enhancements: (generic) float, (generic) string
		115	};
		116
18	#define F_SHRINK 0x00000200UL	117	#define F_SHRINK 0x00000001UL
19	#define F_ALLOW_UNKNOWN 0x00002000UL	118	#define F_ALLOW_UNKNOWN 0x00000002UL
		119	#define F_ALLOW_SHARING 0x00000004UL
		120	#define F_ALLOW_CYCLES 0x00000008UL
		121	#define F_FORBID_OBJECTS 0x00000010UL
		122	#define F_PACK_STRINGS 0x00000020UL
		123	#define F_TEXT_KEYS 0x00000040UL
		124	#define F_TEXT_STRINGS 0x00000080UL
		125	#define F_VALIDATE_UTF8 0x00000100UL
20		126
21	#define INIT_SIZE 32 // initial scalar size to be allocated	127	#define INIT_SIZE 32 // initial scalar size to be allocated
22		128
23	#define SB do {	129	#define SB do {
24	#define SE } while (0)	130	#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		131
37	#define IN_RANGE_INC(type,val,beg,end) \	132	#define IN_RANGE_INC(type,val,beg,end) \
38	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \	133	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
39	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))	134	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
40		135
…		…
46	#else	141	#else
47	# define CBOR_SLOW 0	142	# define CBOR_SLOW 0
48	# define CBOR_STASH cbor_stash	143	# define CBOR_STASH cbor_stash
49	#endif	144	#endif
50		145
51	static HV *cbor_stash, *cbor_boolean_stash; // CBOR::XS::	146	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
52	static SV *cbor_true, *cbor_false;	147	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
53		148
54	typedef struct {	149	typedef struct {
55	U32 flags;	150	U32 flags;
56	U32 max_depth;	151	U32 max_depth;
57	STRLEN max_size;	152	STRLEN max_size;
		153	SV *filter;
58		154
59	SV *cb_object;	155	// for the incremental parser
60	HV *cb_sk_object;	156	STRLEN incr_pos; // the current offset into the text
		157	STRLEN incr_need; // minimum bytes needed to decode
		158	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
61	} CBOR;	159	} CBOR;
62		160
63	INLINE void	161	ecb_inline void
64	cbor_init (CBOR *cbor)	162	cbor_init (CBOR *cbor)
65	{	163	{
66	Zero (cbor, 1, CBOR);	164	Zero (cbor, 1, CBOR);
67	cbor->max_depth = 512;	165	cbor->max_depth = 512;
68	}	166	}
69		167
		168	ecb_inline void
		169	cbor_free (CBOR *cbor)
		170	{
		171	SvREFCNT_dec (cbor->filter);
		172	SvREFCNT_dec (cbor->incr_count);
		173	}
		174
70	/////////////////////////////////////////////////////////////////////////////	175	/////////////////////////////////////////////////////////////////////////////
71	// utility functions	176	// utility functions
72		177
73	INLINE SV *	178	ecb_inline SV *
74	get_bool (const char *name)	179	get_bool (const char *name)
75	{	180	{
76	SV *sv = get_sv (name, 1);	181	SV *sv = get_sv (name, 1);
77		182
78	SvREADONLY_on (sv);	183	SvREADONLY_on (sv);
79	SvREADONLY_on (SvRV (sv));	184	SvREADONLY_on (SvRV (sv));
80		185
81	return sv;	186	return sv;
82	}	187	}
83		188
84	INLINE void	189	ecb_inline void
85	shrink (SV *sv)	190	shrink (SV *sv)
86	{	191	{
87	sv_utf8_downgrade (sv, 1);	192	sv_utf8_downgrade (sv, 1);
88		193
89	if (SvLEN (sv) > SvCUR (sv) + 1)	194	if (SvLEN (sv) > SvCUR (sv) + 1)
…		…
94	SvPV_renew (sv, SvCUR (sv) + 1);	199	SvPV_renew (sv, SvCUR (sv) + 1);
95	#endif	200	#endif
96	}	201	}
97	}	202	}
98		203
99	/////////////////////////////////////////////////////////////////////////////	204	// minimum length of a string to be registered for stringref
100	// fp hell	205	ecb_inline int
101		206	minimum_string_length (UV idx)
102	//TODO	207	{
		208	return idx <= 23 ? 3
		209	: idx <= 0xffU ? 4
		210	: idx <= 0xffffU ? 5
		211	: idx <= 0xffffffffU ? 7
		212	: 11;
		213	}
103		214
104	/////////////////////////////////////////////////////////////////////////////	215	/////////////////////////////////////////////////////////////////////////////
105	// encoder	216	// encoder
106		217
107	// structure used for encoding CBOR	218	// structure used for encoding CBOR
…		…
110	char *cur; // SvPVX (sv) + current output position	221	char *cur; // SvPVX (sv) + current output position
111	char *end; // SvEND (sv)	222	char *end; // SvEND (sv)
112	SV *sv; // result scalar	223	SV *sv; // result scalar
113	CBOR cbor;	224	CBOR cbor;
114	U32 depth; // recursion level	225	U32 depth; // recursion level
		226	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		227	UV stringref_idx;
		228	HV *shareable; // ptr => index, or 0
		229	UV shareable_idx;
115	} enc_t;	230	} enc_t;
116		231
117	INLINE void	232	ecb_inline void
118	need (enc_t *enc, STRLEN len)	233	need (enc_t *enc, STRLEN len)
119	{	234	{
120	if (expect_false (enc->cur + len >= enc->end))	235	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
121	{	236	{
122	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	237	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
123	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	238	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
124	enc->cur = SvPVX (enc->sv) + cur;	239	enc->cur = SvPVX (enc->sv) + cur;
125	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	240	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
126	}	241	}
127	}	242	}
128		243
129	INLINE void	244	ecb_inline void
130	encode_ch (enc_t *enc, char ch)	245	encode_ch (enc_t *enc, char ch)
131	{	246	{
132	need (enc, 1);	247	need (enc, 1);
133	*enc->cur++ = ch;	248	*enc->cur++ = ch;
134	}	249	}
135		250
		251	// used for tags, intregers, element counts and so on
136	static void	252	static void
137	encode_uint (enc_t *enc, int major, UV len)	253	encode_uint (enc_t *enc, int major, UV len)
138	{	254	{
139	need (enc, 9);	255	need (enc, 9);
140		256
141	if (len < 24)	257	if (ecb_expect_true (len < LENGTH_EXT1))
142	*enc->cur++ = major | len;	258	*enc->cur++ = major | len;
143	else if (len < 0x100)	259	else if (ecb_expect_true (len <= 0xffU))
144	{	260	{
145	*enc->cur++ = major | 24;	261	*enc->cur++ = major | LENGTH_EXT1;
146	*enc->cur++ = len;	262	*enc->cur++ = len;
147	}	263	}
148	else if (len < 0x10000)	264	else if (len <= 0xffffU)
149	{	265	{
150	*enc->cur++ = major | 25;	266	*enc->cur++ = major | LENGTH_EXT2;
151	*enc->cur++ = len >> 8;	267	*enc->cur++ = len >> 8;
152	*enc->cur++ = len;	268	*enc->cur++ = len;
153	}	269	}
154	else if (len < 0x100000000)	270	else if (len <= 0xffffffffU)
155	{	271	{
156	*enc->cur++ = major | 26;	272	*enc->cur++ = major | LENGTH_EXT4;
157	*enc->cur++ = len >> 24;	273	*enc->cur++ = len >> 24;
158	*enc->cur++ = len >> 16;	274	*enc->cur++ = len >> 16;
159	*enc->cur++ = len >> 8;	275	*enc->cur++ = len >> 8;
160	*enc->cur++ = len;	276	*enc->cur++ = len;
161	}	277	}
162	else if (len)	278	else
163	{	279	{
164	*enc->cur++ = major | 27;	280	*enc->cur++ = major | LENGTH_EXT8;
165	*enc->cur++ = len >> 56;	281	*enc->cur++ = len >> 56;
166	*enc->cur++ = len >> 48;	282	*enc->cur++ = len >> 48;
167	*enc->cur++ = len >> 40;	283	*enc->cur++ = len >> 40;
168	*enc->cur++ = len >> 32;	284	*enc->cur++ = len >> 32;
169	*enc->cur++ = len >> 24;	285	*enc->cur++ = len >> 24;
…		…
171	*enc->cur++ = len >> 8;	287	*enc->cur++ = len >> 8;
172	*enc->cur++ = len;	288	*enc->cur++ = len;
173	}	289	}
174	}	290	}
175		291
176	static void	292	// encodes a perl value into a CBOR integer
		293	ecb_inline void
		294	encode_int (enc_t *enc, SV *sv)
		295	{
		296	if (SvIsUV (sv))
		297	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
		298	else if (SvIVX (sv) >= 0)
		299	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
		300	else
		301	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
		302	}
		303
		304	ecb_inline void
		305	encode_tag (enc_t *enc, UV tag)
		306	{
		307	encode_uint (enc, MAJOR_TAG, tag);
		308	}
		309
		310	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		311	ecb_noinline static void
177	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	312	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
178	{	313	{
179	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	314	STRLEN ulen = len;
		315	U8 *p, *pend = (U8 *)str + len;
		316
		317	for (p = (U8 *)str; p < pend; ++p)
		318	ulen += *p >> 7; // count set high bits
		319
		320	encode_uint (enc, MAJOR_TEXT, ulen);
		321
		322	need (enc, ulen);
		323	for (p = (U8 *)str; p < pend; ++p)
		324	if (*p < 0x80)
		325	*enc->cur++ = *p;
		326	else
		327	{
		328	*enc->cur++ = 0xc0 + (*p >> 6);
		329	*enc->cur++ = 0x80 + (*p & 63);
		330	}
		331	}
		332
		333	ecb_inline void
		334	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		335	{
		336	if (ecb_expect_false (upgrade_utf8))
		337	if (!utf8)
		338	{
		339	encode_str_utf8 (enc, utf8, str, len);
		340	return;
		341	}
		342
		343	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
180	need (enc, len);	344	need (enc, len);
181	memcpy (enc->cur, str, len);	345	memcpy (enc->cur, str, len);
182	enc->cur += len;	346	enc->cur += len;
183	}	347	}
184		348
		349	ecb_inline void
		350	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		351	{
		352	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		353	{
		354	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		355
		356	if (SvOK (*svp))
		357	{
		358	// already registered, use stringref
		359	encode_tag (enc, CBOR_TAG_STRINGREF);
		360	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		361	return;
		362	}
		363	else if (len >= minimum_string_length (enc->stringref_idx))
		364	{
		365	// register only
		366	sv_setuv (*svp, enc->stringref_idx);
		367	++enc->stringref_idx;
		368	}
		369	}
		370
		371	encode_str (enc, upgrade_utf8, utf8, str, len);
		372	}
		373
		374	ecb_inline void
		375	encode_float16 (enc_t *enc, NV nv)
		376	{
		377	need (enc, 1+2);
		378
		379	*enc->cur++ = MAJOR_MISC | MISC_FLOAT16;
		380
		381	uint16_t fp = ecb_float_to_binary16 (nv);
		382
		383	if (!ecb_big_endian ())
		384	fp = ecb_bswap16 (fp);
		385
		386	memcpy (enc->cur, &fp, 2);
		387	enc->cur += 2;
		388	}
		389
		390	ecb_inline void
		391	encode_float32 (enc_t *enc, NV nv)
		392	{
		393	need (enc, 1+4);
		394
		395	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
		396
		397	uint32_t fp = ecb_float_to_binary32 (nv);
		398
		399	if (!ecb_big_endian ())
		400	fp = ecb_bswap32 (fp);
		401
		402	memcpy (enc->cur, &fp, 4);
		403	enc->cur += 4;
		404	}
		405
		406	ecb_inline void
		407	encode_float64 (enc_t *enc, NV nv)
		408	{
		409	need (enc, 1+8);
		410
		411	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
		412
		413	uint64_t fp = ecb_double_to_binary64 (nv);
		414
		415	if (!ecb_big_endian ())
		416	fp = ecb_bswap64 (fp);
		417
		418	memcpy (enc->cur, &fp, 8);
		419	enc->cur += 8;
		420	}
		421
		422	ecb_inline void
		423	encode_bool (enc_t *enc, int istrue)
		424	{
		425	encode_ch (enc, istrue ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		426	}
		427
		428	ecb_inline void
		429	encode_forced (enc_t *enc, UV type, SV *sv)
		430	{
		431	switch (type)
		432	{
		433	case AS_CBOR:
		434	{
		435	STRLEN len;
		436	char *str = SvPVbyte (sv, len);
		437
		438	need (enc, len);
		439	memcpy (enc->cur, str, len);
		440	enc->cur += len;
		441	}
		442	break;
		443
		444	case AS_BYTES:
		445	{
		446	STRLEN len;
		447	char *str = SvPVbyte (sv, len);
		448	encode_strref (enc, 0, 0, str, len);
		449	}
		450	break;
		451
		452	case AS_TEXT:
		453	{
		454	STRLEN len;
		455	char *str = SvPVutf8 (sv, len);
		456	encode_strref (enc, 1, 1, str, len);
		457	}
		458	break;
		459
		460	case AS_INT: encode_int (enc, sv); break;
		461
		462	case AS_FLOAT16: encode_float16 (enc, SvNV (sv)); break;
		463	case AS_FLOAT32: encode_float32 (enc, SvNV (sv)); break;
		464	case AS_FLOAT64: encode_float64 (enc, SvNV (sv)); break;
		465
		466	default:
		467	croak ("encountered malformed CBOR::XS::Tagged object");
		468	}
		469	}
		470
185	static void encode_sv (enc_t *enc, SV *sv);	471	static void encode_sv (enc_t *enc, SV *sv);
186		472
187	static void	473	static void
188	encode_av (enc_t *enc, AV *av)	474	encode_av (enc_t *enc, AV *av)
189	{	475	{
…		…
192	if (enc->depth >= enc->cbor.max_depth)	478	if (enc->depth >= enc->cbor.max_depth)
193	croak (ERR_NESTING_EXCEEDED);	479	croak (ERR_NESTING_EXCEEDED);
194		480
195	++enc->depth;	481	++enc->depth;
196		482
197	encode_uint (enc, 0x80, len + 1);	483	encode_uint (enc, MAJOR_ARRAY, len + 1);
198		484
		485	if (ecb_expect_false (SvMAGICAL (av)))
199	for (i = 0; i <= len; ++i)	486	for (i = 0; i <= len; ++i)
200	{	487	{
201	SV **svp = av_fetch (av, i, 0);	488	SV **svp = av_fetch (av, i, 0);
202	encode_sv (enc, svp ? *svp : &PL_sv_undef);	489	encode_sv (enc, svp ? *svp : &PL_sv_undef);
203	}	490	}
		491	else
		492	for (i = 0; i <= len; ++i)
		493	{
		494	SV *sv = AvARRAY (av)[i];
		495	encode_sv (enc, sv ? sv : &PL_sv_undef);
		496	}
204		497
205	--enc->depth;	498	--enc->depth;
206	}	499	}
207		500
208	static void	501	static void
…		…
216	++enc->depth;	509	++enc->depth;
217		510
218	int pairs = hv_iterinit (hv);	511	int pairs = hv_iterinit (hv);
219	int mg = SvMAGICAL (hv);	512	int mg = SvMAGICAL (hv);
220		513
221	if (mg)	514	if (ecb_expect_false (mg))
222	encode_ch (enc, 0xa0 | 31);	515	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
223	else	516	else
224	encode_uint (enc, 0xa0, pairs);	517	encode_uint (enc, MAJOR_MAP, pairs);
225		518
226	while ((he = hv_iternext (hv)))	519	while ((he = hv_iternext (hv)))
227	{	520	{
228	if (HeKLEN (he) == HEf_SVKEY)	521	if (HeKLEN (he) == HEf_SVKEY)
229	encode_sv (enc, HeSVKEY (he));	522	encode_sv (enc, HeSVKEY (he));
230	else	523	else
231	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	524	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
232		525
233	encode_sv (enc, expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	526	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
234	}	527	}
235		528
236	if (mg)	529	if (ecb_expect_false (mg))
237	encode_ch (enc, 0xe0 | 31);	530	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
238		531
239	--enc->depth;	532	--enc->depth;
240	}	533	}
241		534
242	// encode objects, arrays and special \0=false and \1=true values.	535	// encode objects, arrays and special \0=false and \1=true values.
243	static void	536	static void
244	encode_rv (enc_t *enc, SV *sv)	537	encode_rv (enc_t *enc, SV *sv)
245	{	538	{
246	svtype svt;
247
248	SvGETMAGIC (sv);	539	SvGETMAGIC (sv);
		540
249	svt = SvTYPE (sv);	541	svtype svt = SvTYPE (sv);
250		542
251	if (expect_false (SvOBJECT (sv)))	543	if (ecb_expect_false (SvOBJECT (sv)))
252	{	544	{
253	HV *stash = !CBOR_SLOW || cbor_boolean_stash	545	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
254	? cbor_boolean_stash	546	? types_boolean_stash
		547	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		548	HV *error_stash = !CBOR_SLOW || types_error_stash
		549	? types_error_stash
		550	: gv_stashpv ("Types::Serialiser::Error", 1);
		551	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		552	? cbor_tagged_stash
255	: gv_stashpv ("CBOR::XS::Boolean", 1);	553	: gv_stashpv ("CBOR::XS::Tagged" , 1);
256		554
257	if (SvSTASH (sv) == stash)	555	HV *stash = SvSTASH (sv);
258	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	556
		557	if (stash == boolean_stash)
		558	{
		559	encode_bool (enc, SvIV (sv));
		560	return;
		561	}
		562	else if (stash == error_stash)
		563	{
		564	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		565	return;
		566	}
		567	else if (stash == tagged_stash)
		568	{
		569	if (svt != SVt_PVAV)
		570	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		571
		572	switch (av_len ((AV *)sv))
		573	{
		574	case 2-1:
		575	// actually a tagged value
		576	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
		577	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		578	break;
		579
		580	case 3-1:
		581	// a forced type [value, type, undef]
		582	encode_forced (enc, SvUV (*av_fetch ((AV *)sv, 1, 1)), *av_fetch ((AV *)sv, 0, 1));
		583	break;
		584
		585	default:
		586	croak ("encountered malformed CBOR::XS::Tagged object");
		587	}
		588
		589	return;
		590	}
		591	}
		592
		593	if (ecb_expect_false (SvREFCNT (sv) > 1)
		594	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		595	{
		596	if (ecb_expect_false (!enc->shareable))
		597	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		598
		599	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		600
		601	if (SvOK (*svp))
		602	{
		603	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		604	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		605	return;
		606	}
259	else	607	else
260	{	608	{
261	#if 0 //TODO	609	sv_setuv (*svp, enc->shareable_idx);
262	if (enc->cbor.flags & F_CONV_BLESSED)	610	++enc->shareable_idx;
		611	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		612	}
		613	}
		614
		615	if (ecb_expect_false (SvOBJECT (sv)))
		616	{
		617	HV *stash = SvSTASH (sv);
		618	GV *method;
		619
		620	if (enc->cbor.flags & F_FORBID_OBJECTS)
		621	croak ("encountered object '%s', but forbid_objects is enabled",
		622	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		623	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
263	{	624	{
		625	dSP;
		626
		627	ENTER; SAVETMPS;
		628	PUSHMARK (SP);
264	// we re-bless the reference to get overload and other niceties right	629	// 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)));	630	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
273		631
274	// calling with G_SCALAR ensures that we always get a 1 return value
275	PUTBACK;	632	PUTBACK;
		633	// G_SCALAR ensures that return value is 1
276	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	634	call_sv ((SV *)GvCV (method), G_SCALAR);
277	SPAGAIN;	635	SPAGAIN;
278		636
279	// catch this surprisingly common error	637	// catch this surprisingly common error
280	if (SvROK (TOPs) && SvRV (TOPs) == sv)	638	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)));	639	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
282		640
283	sv = POPs;
284	PUTBACK;
285
286	encode_sv (enc, sv);	641	encode_sv (enc, POPs);
287		642
		643	PUTBACK;
		644
288	FREETMPS; LEAVE;	645	FREETMPS; LEAVE;
289	}	646	}
290	else if (enc->cbor.flags & F_ALLOW_BLESSED)	647	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
291	encode_str (enc, "null", 4, 0);	648	{
292	else	649	dSP;
293	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it",	650
294	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	651	ENTER; SAVETMPS;
		652	PUSHMARK (SP);
		653	EXTEND (SP, 2);
		654	// we re-bless the reference to get overload and other niceties right
		655	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		656	PUSHs (sv_cbor);
		657
		658	PUTBACK;
		659	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		660	SPAGAIN;
		661
		662	// catch this surprisingly common error
		663	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		664	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		665
		666	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		667	encode_uint (enc, MAJOR_ARRAY, count + 1);
		668	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		669
		670	{
		671	int i;
		672
		673	for (i = 0; i < count; ++i)
		674	encode_sv (enc, SP[i + 1 - count]);
		675
		676	SP -= count;
295	}	677	}
296	else if (enc->cbor.flags & F_ALLOW_BLESSED)	678
297	encode_str (enc, "null", 4, 0);	679	PUTBACK;
		680
		681	FREETMPS; LEAVE;
		682	}
298	else	683	else
299	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	684	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
300	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	685	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
301	#endif
302	}
303	}	686	}
304	else if (svt == SVt_PVHV)	687	else if (svt == SVt_PVHV)
305	encode_hv (enc, (HV *)sv);	688	encode_hv (enc, (HV *)sv);
306	else if (svt == SVt_PVAV)	689	else if (svt == SVt_PVAV)
307	encode_av (enc, (AV *)sv);	690	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	691	else
326	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	692	{
327	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	693	encode_tag (enc, CBOR_TAG_INDIRECTION);
		694	encode_sv (enc, sv);
		695	}
328	}	696	}
329		697
330	static void	698	static void
331	encode_nv (enc_t *enc, SV *sv)	699	encode_nv (enc_t *enc, SV *sv)
332	{	700	{
333	double nv = SvNVX (sv);	701	double nv = SvNVX (sv);
334		702
335	need (enc, 9);	703	need (enc, 9);
336		704
337	if (expect_false (nv == (U32)nv))	705	if (ecb_expect_false (nv == (NV)(U32)nv))
338	encode_uint (enc, 0x00, (U32)nv);	706	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
339	//TODO: maybe I32?	707	//TODO: maybe I32?
340	else if (expect_false (nv == (float)nv))	708	else if (ecb_expect_false (nv == (float)nv))
341	{	709	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	710	else
353	{	711	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	}	712	}
365		713
366	static void	714	static void
367	encode_sv (enc_t *enc, SV *sv)	715	encode_sv (enc_t *enc, SV *sv)
368	{	716	{
…		…
370		718
371	if (SvPOKp (sv))	719	if (SvPOKp (sv))
372	{	720	{
373	STRLEN len;	721	STRLEN len;
374	char *str = SvPV (sv, len);	722	char *str = SvPV (sv, len);
375	encode_str (enc, SvUTF8 (sv), str, len);	723	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
376	}	724	}
377	else if (SvNOKp (sv))	725	else if (SvNOKp (sv))
378	encode_nv (enc, sv);	726	encode_nv (enc, sv);
379	else if (SvIOKp (sv))	727	else if (SvIOKp (sv))
380	{	728	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))	729	else if (SvROK (sv))
389	encode_rv (enc, SvRV (sv));	730	encode_rv (enc, SvRV (sv));
390	else if (!SvOK (sv))	731	else if (!SvOK (sv))
391	encode_ch (enc, 0xe0 | 22);	732	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
392	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	733	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
393	encode_ch (enc, 0xe0 | 23);	734	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
394	else	735	else
395	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	736	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
396	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	737	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
397	}	738	}
398		739
399	static SV *	740	static SV *
400	encode_cbor (SV *scalar, CBOR *cbor)	741	encode_cbor (SV *scalar, CBOR *cbor)
401	{	742	{
402	enc_t enc;	743	enc_t enc = { 0 };
403		744
404	enc.cbor = *cbor;	745	enc.cbor = *cbor;
405	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	746	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
406	enc.cur = SvPVX (enc.sv);	747	enc.cur = SvPVX (enc.sv);
407	enc.end = SvEND (enc.sv);	748	enc.end = SvEND (enc.sv);
408	enc.depth = 0;
409		749
410	SvPOK_only (enc.sv);	750	SvPOK_only (enc.sv);
		751
		752	if (cbor->flags & F_PACK_STRINGS)
		753	{
		754	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		755	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		756	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		757	}
		758
411	encode_sv (&enc, scalar);	759	encode_sv (&enc, scalar);
412		760
413	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	761	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
414	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	762	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
415		763
…		…
429	U8 *end; // end of input string	777	U8 *end; // end of input string
430	const char *err; // parse error, if != 0	778	const char *err; // parse error, if != 0
431	CBOR cbor;	779	CBOR cbor;
432	U32 depth; // recursion depth	780	U32 depth; // recursion depth
433	U32 maxdepth; // recursion depth limit	781	U32 maxdepth; // recursion depth limit
		782	AV *shareable;
		783	AV *stringref;
		784	SV *decode_tagged;
		785	SV *err_sv; // optional sv for error, needs to be freed
434	} dec_t;	786	} dec_t;
435		787
436	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	788	// set dec->err to ERRSV
		789	ecb_cold static void
		790	err_errsv (dec_t *dec)
		791	{
		792	if (!dec->err)
		793	{
		794	dec->err_sv = newSVsv (ERRSV);
437		795
438	#define WANT(len) if (expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data");	796	// chop off the trailing \n
		797	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		798	*SvEND (dec->err_sv) = 0;
439		799
		800	dec->err = SvPVutf8_nolen (dec->err_sv);
		801	}
		802	}
		803
		804	// the following functions are used to reduce code size and help the compiler to optimise
		805	ecb_cold static void
		806	err_set (dec_t *dec, const char *reason)
		807	{
		808	if (!dec->err)
		809	dec->err = reason;
		810	}
		811
		812	ecb_cold static void
		813	err_unexpected_end (dec_t *dec)
		814	{
		815	err_set (dec, "unexpected end of CBOR data");
		816	}
		817
		818	#define ERR_DO(do) SB do; goto fail; SE
		819	#define ERR(reason) ERR_DO (err_set (dec, reason))
		820	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		821
		822	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		823
440	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	824	#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	825	#define DEC_DEC_DEPTH --dec->depth
442		826
443	static UV	827	static UV
444	decode_uint (dec_t *dec)	828	decode_uint (dec_t *dec)
445	{	829	{
446	switch (*dec->cur & 31)	830	U8 m = *dec->cur & MINOR_MASK;
447	{	831	++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		832
453	case 24:	833	if (ecb_expect_true (m < LENGTH_EXT1))
		834	return m;
		835	else if (ecb_expect_true (m == LENGTH_EXT1))
		836	{
454	WANT (2);	837	WANT (1);
455	dec->cur += 2;	838	dec->cur += 1;
456	return dec->cur[-1];	839	return dec->cur[-1];
457		840	}
458	case 25:	841	else if (ecb_expect_true (m == LENGTH_EXT2))
		842	{
459	WANT (3);	843	WANT (2);
460	dec->cur += 3;	844	dec->cur += 2;
461	return (((UV)dec->cur[-2]) << 8)	845	return (((UV)dec->cur[-2]) << 8)
462	| ((UV)dec->cur[-1]);	846	| ((UV)dec->cur[-1]);
463		847	}
464	case 26:	848	else if (ecb_expect_true (m == LENGTH_EXT4))
		849	{
465	WANT (5);	850	WANT (4);
466	dec->cur += 5;	851	dec->cur += 4;
467	return (((UV)dec->cur[-4]) << 24)	852	return (((UV)dec->cur[-4]) << 24)
468	| (((UV)dec->cur[-3]) << 16)	853	| (((UV)dec->cur[-3]) << 16)
469	| (((UV)dec->cur[-2]) << 8)	854	| (((UV)dec->cur[-2]) << 8)
470	| ((UV)dec->cur[-1]);	855	| ((UV)dec->cur[-1]);
471		856	}
472	case 27:	857	else if (ecb_expect_true (m == LENGTH_EXT8))
		858	{
473	WANT (9);	859	WANT (8);
474	dec->cur += 9;	860	dec->cur += 8;
		861
		862	return
		863	#if UVSIZE < 8
		864	0
		865	#else
475	return (((UV)dec->cur[-8]) << 56)	866	(((UV)dec->cur[-8]) << 56)
476	| (((UV)dec->cur[-7]) << 48)	867	| (((UV)dec->cur[-7]) << 48)
477	| (((UV)dec->cur[-6]) << 40)	868	| (((UV)dec->cur[-6]) << 40)
478	| (((UV)dec->cur[-5]) << 32)	869	| (((UV)dec->cur[-5]) << 32)
		870	#endif
479	| (((UV)dec->cur[-4]) << 24)	871	| (((UV)dec->cur[-4]) << 24)
480	| (((UV)dec->cur[-3]) << 16)	872	| (((UV)dec->cur[-3]) << 16)
481	| (((UV)dec->cur[-2]) << 8)	873	| (((UV)dec->cur[-2]) << 8)
482	| ((UV)dec->cur[-1]);	874	| ((UV)dec->cur[-1]);
483		875	}
484	default:	876	else
485	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	877	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
486	}
487		878
488	fail:	879	fail:
489	return 0;	880	return 0;
490	}	881	}
491		882
…		…
496	{	887	{
497	AV *av = newAV ();	888	AV *av = newAV ();
498		889
499	DEC_INC_DEPTH;	890	DEC_INC_DEPTH;
500		891
501	if ((*dec->cur & 31) == 31)	892	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
502	{	893	{
503	++dec->cur;	894	++dec->cur;
504		895
505	for (;;)	896	for (;;)
506	{	897	{
507	WANT (1);	898	WANT (1);
508		899
509	if (*dec->cur == 0xe0 | 31)	900	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
510	{	901	{
511	++dec->cur;	902	++dec->cur;
512	break;	903	break;
513	}	904	}
514		905
515	av_push (av, decode_sv (dec));	906	av_push (av, decode_sv (dec));
516	}	907	}
517	}	908	}
518	else	909	else
519	{	910	{
520	int i, len = decode_uint (dec);	911	UV i, len = decode_uint (dec);
521		912
		913	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);	914	av_fill (av, len - 1);
523		915
524	for (i = 0; i < len; ++i)	916	for (i = 0; i < len; ++i)
525	AvARRAY (av)[i] = decode_sv (dec);	917	AvARRAY (av)[i] = decode_sv (dec);
526	}	918	}
527		919
528	DEC_DEC_DEPTH;	920	DEC_DEC_DEPTH;
529	return newRV_noinc ((SV *)av);	921	return newRV_noinc ((SV *)av);
530		922
531	fail:	923	fail:
532	SvREFCNT_dec (av);	924	SvREFCNT_dec_NN (av);
533	DEC_DEC_DEPTH;	925	DEC_DEC_DEPTH;
534	return &PL_sv_undef;	926	return &PL_sv_undef;
535	}	927	}
536		928
		929	static void
		930	decode_he (dec_t *dec, HV *hv)
		931	{
		932	// for speed reasons, we specialcase single-string
		933	// byte or utf-8 strings as keys, but only when !stringref
		934
		935	if (ecb_expect_true (!dec->stringref))
		936	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		937	{
		938	STRLEN len = decode_uint (dec);
		939	char *key = (char *)dec->cur;
		940
		941	WANT (len);
		942	dec->cur += len;
		943
		944	hv_store (hv, key, len, decode_sv (dec), 0);
		945
		946	return;
		947	}
		948	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		949	{
		950	STRLEN len = decode_uint (dec);
		951	char *key = (char *)dec->cur;
		952
		953	WANT (len);
		954	dec->cur += len;
		955
		956	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		957	if (!is_utf8_string (key, len))
		958	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		959
		960	hv_store (hv, key, -len, decode_sv (dec), 0);
		961
		962	return;
		963	}
		964
		965	SV *k = decode_sv (dec);
		966	SV *v = decode_sv (dec);
		967
		968	// we leak memory if uncaught exceptions are thrown by random magical
		969	// methods, and this is hopefully the only place where it can happen,
		970	// so if there is a chance of an exception, take the very slow path.
		971	// since catching exceptions is "undocumented/internal/forbidden" by
		972	// the new p5p powers, we need to call out to a perl function :/
		973	if (ecb_expect_false (SvAMAGIC (k)))
		974	{
		975	dSP;
		976
		977	ENTER; SAVETMPS;
		978	PUSHMARK (SP);
		979	EXTEND (SP, 3);
		980	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		981	PUSHs (sv_2mortal (k));
		982	PUSHs (sv_2mortal (v));
		983
		984	PUTBACK;
		985	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		986	SPAGAIN;
		987
		988	FREETMPS; LEAVE;
		989
		990	if (SvTRUE (ERRSV))
		991	ERR_ERRSV;
		992
		993	return;
		994	}
		995
		996	hv_store_ent (hv, k, v, 0);
		997	SvREFCNT_dec_NN (k);
		998
		999	fail:
		1000	;
		1001	}
		1002
537	static SV *	1003	static SV *
538	decode_hv (dec_t *dec)	1004	decode_hv (dec_t *dec)
539	{	1005	{
540	HV *hv = newHV ();	1006	HV *hv = newHV ();
541		1007
542	DEC_INC_DEPTH;	1008	DEC_INC_DEPTH;
543		1009
544	if ((*dec->cur & 31) == 31)	1010	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
545	{	1011	{
546	++dec->cur;	1012	++dec->cur;
547		1013
548	for (;;)	1014	for (;;)
549	{	1015	{
550	WANT (1);	1016	WANT (1);
551		1017
552	if (*dec->cur == 0xe0 | 31)	1018	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
553	{	1019	{
554	++dec->cur;	1020	++dec->cur;
555	break;	1021	break;
556	}	1022	}
557		1023
558	SV *k = decode_sv (dec);	1024	decode_he (dec, hv);
559	SV *v = decode_sv (dec);
560
561	hv_store_ent (hv, k, v, 0);
562	}	1025	}
563	}	1026	}
564	else	1027	else
565	{	1028	{
566	int len = decode_uint (dec);	1029	UV pairs = decode_uint (dec);
567		1030
		1031	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1032
568	while (len--)	1033	while (pairs--)
569	{	1034	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	}	1035	}
576		1036
577	DEC_DEC_DEPTH;	1037	DEC_DEC_DEPTH;
578	return newRV_noinc ((SV *)hv);	1038	return newRV_noinc ((SV *)hv);
579		1039
580	#if 0	1040	fail:
581	SV *sv;	1041	SvREFCNT_dec_NN (hv);
582	HV *hv = newHV ();
583
584	DEC_INC_DEPTH;	1042	DEC_DEC_DEPTH;
585	decode_ws (dec);	1043	return &PL_sv_undef;
		1044	}
586		1045
587	for (;;)	1046	static SV *
588	{	1047	decode_str (dec_t *dec, int utf8)
589	// heuristic: assume that	1048	{
590	// a) decode_str + hv_store_ent are abysmally slow.	1049	SV *sv = 0;
591	// b) most hash keys are short, simple ascii text.	1050
592	// => try to "fast-match" such strings to avoid	1051	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
593	// the overhead of decode_str + hv_store_ent.
594	{	1052	{
595	SV *value;	1053	// indefinite length strings
596	char *p = dec->cur;	1054	++dec->cur;
597	char *e = p + 24; // only try up to 24 bytes
598		1055
		1056	U8 major = *dec->cur & MAJOR_MISC;
		1057
		1058	sv = newSVpvn ("", 0);
		1059
599	for (;;)	1060	for (;;)
600	{	1061	{
601	// the >= 0x80 is false on most architectures	1062	WANT (1);
602	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')	1063
		1064	if ((*dec->cur - major) > LENGTH_EXT8)
		1065	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
603	{	1066	{
604	// slow path, back up and use decode_str	1067	++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;	1068	break;
623	}	1069	}
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	{	1070	else
689	dSP;	1071	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
690	int count;
691		1072
692	ENTER; SAVETMPS; PUSHMARK (SP);	1073	STRLEN len = decode_uint (dec);
693	XPUSHs (HeVAL (he));
694	sv_2mortal (sv);
695		1074
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);	1075	WANT (len);
756		1076	sv_catpvn (sv, dec->cur, len);
757	if (*dec->cur == 0xe0 | 31)	1077	dec->cur += len;
758	{
759	++dec->cur;
760	break;
761	}
762
763	SV *sv2 = decode_sv (dec);
764	sv_catsv (sv, sv2);
765	}	1078	}
766	}	1079	}
767	else	1080	else
768	{	1081	{
769	STRLEN len = decode_uint (dec);	1082	STRLEN len = decode_uint (dec);
770		1083
771	WANT (len);	1084	WANT (len);
772	sv = newSVpvn (dec->cur, len);	1085	sv = newSVpvn (dec->cur, len);
773	dec->cur += len;	1086	dec->cur += len;
		1087
		1088	if (ecb_expect_false (dec->stringref)
		1089	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		1090	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
774	}	1091	}
775		1092
776	if (utf8)	1093	if (utf8)
		1094	{
		1095	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		1096	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		1097	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		1098
777	SvUTF8_on (sv);	1099	SvUTF8_on (sv);
		1100	}
778		1101
779	return sv;	1102	return sv;
780		1103
781	fail:	1104	fail:
		1105	SvREFCNT_dec (sv);
		1106	return &PL_sv_undef;
		1107	}
		1108
		1109	static SV *
		1110	decode_tagged (dec_t *dec)
		1111	{
		1112	SV *sv = 0;
		1113	UV tag = decode_uint (dec);
		1114
		1115	WANT (1);
		1116
		1117	switch (tag)
		1118	{
		1119	case CBOR_TAG_MAGIC:
		1120	sv = decode_sv (dec);
		1121	break;
		1122
		1123	case CBOR_TAG_INDIRECTION:
		1124	sv = newRV_noinc (decode_sv (dec));
		1125	break;
		1126
		1127	case CBOR_TAG_STRINGREF_NAMESPACE:
		1128	{
		1129	// do not use SAVETMPS/FREETMPS, as these will
		1130	// erase mortalised caches, e.g. "shareable"
		1131	ENTER;
		1132
		1133	SAVESPTR (dec->stringref);
		1134	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1135
		1136	sv = decode_sv (dec);
		1137
		1138	LEAVE;
		1139	}
		1140	break;
		1141
		1142	case CBOR_TAG_STRINGREF:
		1143	{
		1144	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1145	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1146
		1147	UV idx = decode_uint (dec);
		1148
		1149	if (!dec->stringref || idx >= (UV)(1 + AvFILLp (dec->stringref)))
		1150	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1151
		1152	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1153	}
		1154	break;
		1155
		1156	case CBOR_TAG_VALUE_SHAREABLE:
		1157	{
		1158	if (ecb_expect_false (!dec->shareable))
		1159	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1160
		1161	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1162	{
		1163	sv = newSV (0);
		1164	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1165
		1166	SV *osv = decode_sv (dec);
		1167	sv_setsv (sv, osv);
		1168	SvREFCNT_dec_NN (osv);
		1169	}
		1170	else
		1171	{
		1172	av_push (dec->shareable, &PL_sv_undef);
		1173	int idx = AvFILLp (dec->shareable);
		1174	sv = decode_sv (dec);
		1175	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1176	}
		1177	}
		1178	break;
		1179
		1180	case CBOR_TAG_VALUE_SHAREDREF:
		1181	{
		1182	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1183	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1184
		1185	UV idx = decode_uint (dec);
		1186
		1187	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
		1188	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1189
		1190	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1191
		1192	if (sv == &PL_sv_undef)
		1193	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1194	}
		1195	break;
		1196
		1197	case CBOR_TAG_PERL_OBJECT:
		1198	{
		1199	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1200	goto filter;
		1201
		1202	sv = decode_sv (dec);
		1203
		1204	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1205	ERR ("corrupted CBOR data (non-array perl object)");
		1206
		1207	AV *av = (AV *)SvRV (sv);
		1208	int len = av_len (av) + 1;
		1209	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1210
		1211	if (!stash)
		1212	ERR ("cannot decode perl-object (package does not exist)");
		1213
		1214	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1215
		1216	if (!method)
		1217	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1218
		1219	dSP;
		1220
		1221	ENTER; SAVETMPS;
		1222	PUSHMARK (SP);
		1223	EXTEND (SP, len + 1);
		1224	// we re-bless the reference to get overload and other niceties right
		1225	PUSHs (*av_fetch (av, 0, 1));
		1226	PUSHs (sv_cbor);
		1227
		1228	int i;
		1229
		1230	for (i = 1; i < len; ++i)
		1231	PUSHs (*av_fetch (av, i, 1));
		1232
		1233	PUTBACK;
		1234	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1235	SPAGAIN;
		1236
		1237	if (SvTRUE (ERRSV))
		1238	{
		1239	FREETMPS; LEAVE;
		1240	ERR_ERRSV;
		1241	}
		1242
		1243	SvREFCNT_dec_NN (sv);
		1244	sv = SvREFCNT_inc (POPs);
		1245
		1246	PUTBACK;
		1247
		1248	FREETMPS; LEAVE;
		1249	}
		1250	break;
		1251
		1252	default:
		1253	filter:
		1254	{
		1255	SV *tag_sv = newSVuv (tag);
		1256
		1257	sv = decode_sv (dec);
		1258
		1259	dSP;
		1260	ENTER; SAVETMPS;
		1261	PUSHMARK (SP);
		1262	EXTEND (SP, 2);
		1263	PUSHs (tag_sv);
		1264	PUSHs (sv);
		1265
		1266	PUTBACK;
		1267	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1268	SPAGAIN;
		1269
		1270	if (SvTRUE (ERRSV))
		1271	{
		1272	SvREFCNT_dec_NN (tag_sv);
		1273	FREETMPS; LEAVE;
		1274	ERR_ERRSV;
		1275	}
		1276
		1277	if (count)
		1278	{
		1279	SvREFCNT_dec_NN (tag_sv);
		1280	SvREFCNT_dec_NN (sv);
		1281	sv = SvREFCNT_inc_NN (TOPs);
		1282	SP -= count;
		1283	}
		1284	else
		1285	{
		1286	AV *av = newAV ();
		1287	av_push (av, tag_sv);
		1288	av_push (av, sv);
		1289
		1290	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1291	? cbor_tagged_stash
		1292	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1293	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1294	}
		1295
		1296	PUTBACK;
		1297
		1298	FREETMPS; LEAVE;
		1299	}
		1300	break;
		1301	}
		1302
		1303	return sv;
		1304
		1305	fail:
		1306	SvREFCNT_dec (sv);
782	return &PL_sv_undef;	1307	return &PL_sv_undef;
783	}	1308	}
784		1309
785	static SV *	1310	static SV *
786	decode_sv (dec_t *dec)	1311	decode_sv (dec_t *dec)
787	{	1312	{
788	WANT (1);	1313	WANT (1);
789		1314
790	switch (*dec->cur >> 5)	1315	switch (*dec->cur >> MAJOR_SHIFT)
791	{	1316	{
792	case 0: // unsigned int	1317	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
793	//TODO: 64 bit values on 3 2bit perls	1318	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
794	return newSVuv (decode_uint (dec));	1319	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
795	case 1: // negative int	1320	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
796	return newSViv (-1 - (IV)decode_uint (dec));	1321	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
797	case 2: // octet string	1322	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
798	return decode_str (dec, 0);	1323	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
799	case 3: // utf-8 string	1324
800	return decode_str (dec, 1);	1325	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)	1326	switch (*dec->cur++ & MINOR_MASK)
810	{	1327	{
811	case 20:	1328	case SIMPLE_FALSE:
812	#if CBOR_SLOW	1329	#if CBOR_SLOW
813	cbor_false = get_bool ("CBOR::XS::false");	1330	types_false = get_bool ("Types::Serialiser::false");
814	#endif	1331	#endif
815	return newSVsv (cbor_false);	1332	return newSVsv (types_false);
816	case 21:	1333	case SIMPLE_TRUE:
817	#if CBOR_SLOW	1334	#if CBOR_SLOW
818	cbor_true = get_bool ("CBOR::XS::true");	1335	types_true = get_bool ("Types::Serialiser::true");
819	#endif	1336	#endif
820	return newSVsv (cbor_true);	1337	return newSVsv (types_true);
821	case 22:	1338	case SIMPLE_NULL:
822	return newSVsv (&PL_sv_undef);	1339	return newSVsv (&PL_sv_undef);
		1340	case SIMPLE_UNDEF:
		1341	#if CBOR_SLOW
		1342	types_error = get_bool ("Types::Serialiser::error");
		1343	#endif
		1344	return newSVsv (types_error);
823		1345
824	case 25:	1346	case MISC_FLOAT16:
825	// half float
826	abort ();
827	break;	1347	{
		1348	WANT (2);
828		1349
		1350	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
		1351	dec->cur += 2;
		1352
		1353	return newSVnv (ecb_binary16_to_float (fp));
		1354	}
		1355
829	case 26:	1356	case MISC_FLOAT32:
830	{	1357	{
831	uint32_t fp;	1358	uint32_t fp;
832	WANT (4);	1359	WANT (4);
833	memcpy (&fp, dec->cur, 4);	1360	memcpy (&fp, dec->cur, 4);
834	dec->cur += 4;	1361	dec->cur += 4;
…		…
837	fp = ecb_bswap32 (fp);	1364	fp = ecb_bswap32 (fp);
838		1365
839	return newSVnv (ecb_binary32_to_float (fp));	1366	return newSVnv (ecb_binary32_to_float (fp));
840	}	1367	}
841		1368
842	case 27:	1369	case MISC_FLOAT64:
843	{	1370	{
844	uint64_t fp;	1371	uint64_t fp;
845	WANT (8);	1372	WANT (8);
846	memcpy (&fp, dec->cur, 8);	1373	memcpy (&fp, dec->cur, 8);
847	dec->cur += 8;	1374	dec->cur += 8;
…		…
850	fp = ecb_bswap64 (fp);	1377	fp = ecb_bswap64 (fp);
851		1378
852	return newSVnv (ecb_binary64_to_double (fp));	1379	return newSVnv (ecb_binary64_to_double (fp));
853	}	1380	}
854		1381
855	// 0..19 unassigned	1382	// 0..19 unassigned simple
856	// 24 reserved + unassigned (reserved values are not encodable)	1383	// 24 reserved + unassigned simple (reserved values are not encodable)
		1384	// 28-30 unassigned misc
		1385	// 31 break code
857	default:	1386	default:
858	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1387	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
859	}	1388	}
860		1389
861	break;	1390	break;
862	}	1391	}
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		1392
920	fail:	1393	fail:
921	return &PL_sv_undef;	1394	return &PL_sv_undef;
922	}	1395	}
923		1396
924	static SV *	1397	static SV *
925	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1398	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
926	{	1399	{
927	dec_t dec;	1400	dec_t dec = { 0 };
928	SV *sv;	1401	SV *sv;
		1402	STRLEN len;
		1403	char *data = SvPVbyte (string, len);
929		1404
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)	1405	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",	1406	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);	1407	(unsigned long)len, (unsigned long)cbor->max_size);
961	}
962
963	sv_utf8_downgrade (string, 0);
964		1408
965	dec.cbor = *cbor;	1409	dec.cbor = *cbor;
966	dec.cur = (U8 *)SvPVX (string);	1410	dec.cur = (U8 *)data;
967	dec.end = (U8 *)SvEND (string);	1411	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		1412
974	sv = decode_sv (&dec);	1413	sv = decode_sv (&dec);
975		1414
976	if (offset_return)	1415	if (offset_return)
977	*offset_return = dec.cur;	1416	*offset_return = dec.cur;
978		1417
979	if (!(offset_return || !sv))	1418	if (!(offset_return || !sv))
980	{
981	if (*dec.cur && !dec.err)	1419	if (dec.cur != dec.end && !dec.err)
982	{
983	dec.err = "garbage after CBOR object";	1420	dec.err = "garbage after CBOR object";
984	SvREFCNT_dec (sv);	1421
985	sv = 0;	1422	if (dec.err)
		1423	{
		1424	if (dec.shareable)
986	}	1425	{
987	}	1426	// need to break cyclic links, which would all be in shareable
		1427	int i;
		1428	SV **svp;
988		1429
989	if (!sv)	1430	for (i = av_len (dec.shareable) + 1; i--; )
		1431	if ((svp = av_fetch (dec.shareable, i, 0)))
		1432	sv_setsv (*svp, &PL_sv_undef);
		1433	}
		1434
		1435	SvREFCNT_dec_NN (sv);
		1436
		1437	if (dec.err_sv)
		1438	sv_2mortal (dec.err_sv);
		1439
990	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1440	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
		1441	}
991		1442
992	sv = sv_2mortal (sv);	1443	sv = sv_2mortal (sv);
993		1444
994	return sv;	1445	return sv;
995	}	1446	}
996		1447
		1448	/////////////////////////////////////////////////////////////////////////////
		1449	// incremental parser
		1450
		1451	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1452
		1453	// returns 0 for notyet, 1 for success or error
		1454	static int
		1455	incr_parse (CBOR *self, SV *cborstr)
		1456	{
		1457	STRLEN cur;
		1458	SvPV (cborstr, cur);
		1459
		1460	while (ecb_expect_true (self->incr_need <= cur))
		1461	{
		1462	// table of integer count bytes
		1463	static I8 incr_len[MINOR_MASK + 1] = {
		1464	0, 0, 0, 0, 0, 0, 0, 0,
		1465	0, 0, 0, 0, 0, 0, 0, 0,
		1466	0, 0, 0, 0, 0, 0, 0, 0,
		1467	1, 2, 4, 8,-1,-1,-1,-2
		1468	};
		1469
		1470	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1471	U8 m = *p & MINOR_MASK;
		1472	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1473	I8 ilen = incr_len[m];
		1474
		1475	self->incr_need = self->incr_pos + 1;
		1476
		1477	if (ecb_expect_false (ilen < 0))
		1478	{
		1479	if (m != MINOR_INDEF)
		1480	return 1; // error
		1481
		1482	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1483	{
		1484	if (count >= 0)
		1485	return 1; // error
		1486
		1487	count = 1;
		1488	}
		1489	else
		1490	{
		1491	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1492	count = -1;
		1493	}
		1494	}
		1495	else
		1496	{
		1497	self->incr_need += ilen;
		1498	if (ecb_expect_false (self->incr_need > cur))
		1499	return 0;
		1500
		1501	int major = *p >> MAJOR_SHIFT;
		1502
		1503	switch (major)
		1504	{
		1505	case MAJOR_TAG >> MAJOR_SHIFT:
		1506	++count; // tags merely prefix another value
		1507	break;
		1508
		1509	case MAJOR_BYTES >> MAJOR_SHIFT:
		1510	case MAJOR_TEXT >> MAJOR_SHIFT:
		1511	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1512	case MAJOR_MAP >> MAJOR_SHIFT:
		1513	{
		1514	UV len;
		1515
		1516	if (ecb_expect_false (ilen))
		1517	{
		1518	len = 0;
		1519
		1520	do {
		1521	len = (len << 8) | *++p;
		1522	} while (--ilen);
		1523	}
		1524	else
		1525	len = m;
		1526
		1527	switch (major)
		1528	{
		1529	case MAJOR_BYTES >> MAJOR_SHIFT:
		1530	case MAJOR_TEXT >> MAJOR_SHIFT:
		1531	self->incr_need += len;
		1532	if (ecb_expect_false (self->incr_need > cur))
		1533	return 0;
		1534
		1535	break;
		1536
		1537	case MAJOR_MAP >> MAJOR_SHIFT:
		1538	len <<= 1;
		1539	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1540	if (len)
		1541	{
		1542	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1543	count = len + 1;
		1544	}
		1545	break;
		1546	}
		1547	}
		1548	}
		1549	}
		1550
		1551	self->incr_pos = self->incr_need;
		1552
		1553	if (count > 0)
		1554	{
		1555	while (!--count)
		1556	{
		1557	if (!AvFILLp (self->incr_count))
		1558	return 1; // done
		1559
		1560	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1561	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1562	}
		1563
		1564	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1565	}
		1566	}
		1567
		1568	return 0;
		1569	}
		1570
		1571
997	/////////////////////////////////////////////////////////////////////////////	1572	/////////////////////////////////////////////////////////////////////////////
998	// XS interface functions	1573	// XS interface functions
999		1574
1000	MODULE = CBOR::XS PACKAGE = CBOR::XS	1575	MODULE = CBOR::XS PACKAGE = CBOR::XS
1001		1576
1002	BOOT:	1577	BOOT:
1003	{	1578	{
1004	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1579	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1005	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1580	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1006		1581
1007	cbor_true = get_bool ("CBOR::XS::true");	1582	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1008	cbor_false = get_bool ("CBOR::XS::false");	1583	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1584
		1585	types_true = get_bool ("Types::Serialiser::true" );
		1586	types_false = get_bool ("Types::Serialiser::false");
		1587	types_error = get_bool ("Types::Serialiser::error");
		1588
		1589	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1590
		1591	sv_cbor = newSVpv ("CBOR", 0);
		1592	SvREADONLY_on (sv_cbor);
		1593
		1594	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
1009	}	1595	}
1010		1596
1011	PROTOTYPES: DISABLE	1597	PROTOTYPES: DISABLE
1012		1598
1013	void CLONE (...)	1599	void CLONE (...)
1014	CODE:	1600	CODE:
1015	cbor_stash = 0;	1601	cbor_stash = 0;
		1602	cbor_tagged_stash = 0;
		1603	types_error_stash = 0;
1016	cbor_boolean_stash = 0;	1604	types_boolean_stash = 0;
1017		1605
1018	void new (char *klass)	1606	void new (char *klass)
1019	PPCODE:	1607	PPCODE:
1020	{	1608	{
1021	SV *pv = NEWSV (0, sizeof (CBOR));	1609	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1029		1617
1030	void shrink (CBOR *self, int enable = 1)	1618	void shrink (CBOR *self, int enable = 1)
1031	ALIAS:	1619	ALIAS:
1032	shrink = F_SHRINK	1620	shrink = F_SHRINK
1033	allow_unknown = F_ALLOW_UNKNOWN	1621	allow_unknown = F_ALLOW_UNKNOWN
		1622	allow_sharing = F_ALLOW_SHARING
		1623	allow_cycles = F_ALLOW_CYCLES
		1624	forbid_objects = F_FORBID_OBJECTS
		1625	pack_strings = F_PACK_STRINGS
		1626	text_keys = F_TEXT_KEYS
		1627	text_strings = F_TEXT_STRINGS
		1628	validate_utf8 = F_VALIDATE_UTF8
1034	PPCODE:	1629	PPCODE:
1035	{	1630	{
1036	if (enable)	1631	if (enable)
1037	self->flags |= ix;	1632	self->flags |= ix;
1038	else	1633	else
…		…
1043		1638
1044	void get_shrink (CBOR *self)	1639	void get_shrink (CBOR *self)
1045	ALIAS:	1640	ALIAS:
1046	get_shrink = F_SHRINK	1641	get_shrink = F_SHRINK
1047	get_allow_unknown = F_ALLOW_UNKNOWN	1642	get_allow_unknown = F_ALLOW_UNKNOWN
		1643	get_allow_sharing = F_ALLOW_SHARING
		1644	get_allow_cycles = F_ALLOW_CYCLES
		1645	get_forbid_objects = F_FORBID_OBJECTS
		1646	get_pack_strings = F_PACK_STRINGS
		1647	get_text_keys = F_TEXT_KEYS
		1648	get_text_strings = F_TEXT_STRINGS
		1649	get_validate_utf8 = F_VALIDATE_UTF8
1048	PPCODE:	1650	PPCODE:
1049	XPUSHs (boolSV (self->flags & ix));	1651	XPUSHs (boolSV (self->flags & ix));
1050		1652
1051	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1653	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1052	PPCODE:	1654	PPCODE:
…		…
1068	CODE:	1670	CODE:
1069	RETVAL = self->max_size;	1671	RETVAL = self->max_size;
1070	OUTPUT:	1672	OUTPUT:
1071	RETVAL	1673	RETVAL
1072		1674
1073	#if 0 //TODO	1675	void filter (CBOR *self, SV *filter = 0)
1074
1075	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1076	PPCODE:	1676	PPCODE:
1077	{
1078	SvREFCNT_dec (self->cb_object);	1677	SvREFCNT_dec (self->filter);
1079	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1678	self->filter = filter ? newSVsv (filter) : filter;
1080
1081	XPUSHs (ST (0));	1679	XPUSHs (ST (0));
1082	}
1083		1680
1084	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1681	SV *get_filter (CBOR *self)
1085	PPCODE:	1682	CODE:
1086	{	1683	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1087	if (!self->cb_sk_object)	1684	OUTPUT:
1088	self->cb_sk_object = newHV ();	1685	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		1686
1108	void encode (CBOR *self, SV *scalar)	1687	void encode (CBOR *self, SV *scalar)
1109	PPCODE:	1688	PPCODE:
1110	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1689	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1111	XPUSHs (scalar);	1690	XPUSHs (scalar);
…		…
1124	EXTEND (SP, 2);	1703	EXTEND (SP, 2);
1125	PUSHs (sv);	1704	PUSHs (sv);
1126	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1705	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1127	}	1706	}
1128		1707
		1708	void incr_parse (CBOR *self, SV *cborstr)
		1709	ALIAS:
		1710	incr_parse_multiple = 1
		1711	PPCODE:
		1712	{
		1713	if (SvUTF8 (cborstr))
		1714	sv_utf8_downgrade (cborstr, 0);
		1715
		1716	if (!self->incr_count)
		1717	{
		1718	self->incr_count = newAV ();
		1719	self->incr_pos = 0;
		1720	self->incr_need = 1;
		1721
		1722	av_push (self->incr_count, newSViv (1));
		1723	}
		1724
		1725	do
		1726	{
		1727	if (!incr_parse (self, cborstr))
		1728	{
		1729	if (self->incr_need > self->max_size && self->max_size)
		1730	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1731	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1732
		1733	break;
		1734	}
		1735
		1736	SV *sv;
		1737	char *offset;
		1738
		1739	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1740	XPUSHs (sv);
		1741
		1742	sv_chop (cborstr, offset);
		1743
		1744	av_clear (self->incr_count);
		1745	av_push (self->incr_count, newSViv (1));
		1746
		1747	self->incr_pos = 0;
		1748	self->incr_need = self->incr_pos + 1;
		1749	}
		1750	while (ix);
		1751	}
		1752
		1753	void incr_reset (CBOR *self)
		1754	CODE:
		1755	{
		1756	SvREFCNT_dec (self->incr_count);
		1757	self->incr_count = 0;
		1758	}
		1759
1129	void DESTROY (CBOR *self)	1760	void DESTROY (CBOR *self)
1130	CODE:	1761	PPCODE:
1131	SvREFCNT_dec (self->cb_sk_object);	1762	cbor_free (self);
1132	SvREFCNT_dec (self->cb_object);
1133		1763
1134	PROTOTYPES: ENABLE	1764	PROTOTYPES: ENABLE
1135		1765
1136	void encode_cbor (SV *scalar)	1766	void encode_cbor (SV *scalar)
		1767	ALIAS:
		1768	encode_cbor = 0
		1769	encode_cbor_sharing = F_ALLOW_SHARING
1137	PPCODE:	1770	PPCODE:
1138	{	1771	{
1139	CBOR cbor;	1772	CBOR cbor;
1140	cbor_init (&cbor);	1773	cbor_init (&cbor);
		1774	cbor.flags |= ix;
1141	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1775	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1142	XPUSHs (scalar);	1776	XPUSHs (scalar);
1143	}	1777	}
1144		1778
1145	void decode_cbor (SV *cborstr)	1779	void decode_cbor (SV *cborstr)
…		…
1149	cbor_init (&cbor);	1783	cbor_init (&cbor);
1150	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1784	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1151	XPUSHs (cborstr);	1785	XPUSHs (cborstr);
1152	}	1786	}
1153		1787
		1788	#ifdef __AFL_COMPILER
		1789
		1790	void
		1791	afl_init ()
		1792	CODE:
		1793	__AFL_INIT ();
		1794
		1795	int
		1796	afl_loop (unsigned int count = 10000)
		1797	CODE:
		1798	RETVAL = __AFL_LOOP (count);
		1799	OUTPUT:
		1800	RETVAL
		1801
		1802	#endif
		1803

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