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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.4 by root, Sat Oct 26 21:06:37 2013 UTC vs.
Revision 1.68 by root, Mon Nov 30 18:30:29 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
		16	// compatibility with perl <5.18
		17	#ifndef HvNAMELEN_get
		18	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		19	#endif
		20	#ifndef HvNAMELEN
		21	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		22	#endif
		23	#ifndef HvNAMEUTF8
		24	# define HvNAMEUTF8(hv) 0
		25	#endif
		26	#ifndef SvREFCNT_inc_NN
		27	# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
		28	#endif
		29	#ifndef SvREFCNT_dec_NN
		30	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		31	#endif
		32
		33	// known major and minor types
		34	enum cbor_type
		35	{
		36	MAJOR_SHIFT = 5,
		37	MINOR_MASK = 0x1f,
		38
		39	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		40	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		41	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		42	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		43	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		44	MAJOR_MAP = 5 << MAJOR_SHIFT,
		45	MAJOR_TAG = 6 << MAJOR_SHIFT,
		46	MAJOR_MISC = 7 << MAJOR_SHIFT,
		47
		48	// INT/STRING/ARRAY/MAP subtypes
		49	LENGTH_EXT1 = 24,
		50	LENGTH_EXT2 = 25,
		51	LENGTH_EXT4 = 26,
		52	LENGTH_EXT8 = 27,
		53
		54	// SIMPLE types (effectively MISC subtypes)
		55	SIMPLE_FALSE = 20,
		56	SIMPLE_TRUE = 21,
		57	SIMPLE_NULL = 22,
		58	SIMPLE_UNDEF = 23,
		59
		60	// MISC subtype (unused)
		61	MISC_EXT1 = 24,
		62	MISC_FLOAT16 = 25,
		63	MISC_FLOAT32 = 26,
		64	MISC_FLOAT64 = 27,
		65
		66	// BYTES/TEXT/ARRAY/MAP
		67	MINOR_INDEF = 31,
		68	};
		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
14	#define F_SHRINK 0x00000200UL	117	#define F_SHRINK 0x00000001UL
15	#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
16		126
17	#define INIT_SIZE 32 // initial scalar size to be allocated	127	#define INIT_SIZE 32 // initial scalar size to be allocated
18		128
19	#define SB do {	129	#define SB do {
20	#define SE } while (0)	130	#define SE } while (0)
21
22	#if __GNUC__ >= 3
23	# define expect(expr,value) __builtin_expect ((expr), (value))
24	# define INLINE static inline
25	#else
26	# define expect(expr,value) (expr)
27	# define INLINE static
28	#endif
29
30	#define expect_false(expr) expect ((expr) != 0, 0)
31	#define expect_true(expr) expect ((expr) != 0, 1)
32		131
33	#define IN_RANGE_INC(type,val,beg,end) \	132	#define IN_RANGE_INC(type,val,beg,end) \
34	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \	133	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
35	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))	134	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
36		135
…		…
42	#else	141	#else
43	# define CBOR_SLOW 0	142	# define CBOR_SLOW 0
44	# define CBOR_STASH cbor_stash	143	# define CBOR_STASH cbor_stash
45	#endif	144	#endif
46		145
47	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::
48	static SV *cbor_true, *cbor_false;	147	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
49		148
50	typedef struct {	149	typedef struct {
51	U32 flags;	150	U32 flags;
52	U32 max_depth;	151	U32 max_depth;
53	STRLEN max_size;	152	STRLEN max_size;
		153	SV *filter;
54		154
55	SV *cb_object;	155	// for the incremental parser
56	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.
57	} CBOR;	159	} CBOR;
58		160
59	INLINE void	161	ecb_inline void
60	cbor_init (CBOR *cbor)	162	cbor_init (CBOR *cbor)
61	{	163	{
62	Zero (cbor, 1, CBOR);	164	Zero (cbor, 1, CBOR);
63	cbor->max_depth = 512;	165	cbor->max_depth = 512;
64	}	166	}
65		167
		168	ecb_inline void
		169	cbor_free (CBOR *cbor)
		170	{
		171	SvREFCNT_dec (cbor->filter);
		172	SvREFCNT_dec (cbor->incr_count);
		173	}
		174
66	/////////////////////////////////////////////////////////////////////////////	175	/////////////////////////////////////////////////////////////////////////////
67	// utility functions	176	// utility functions
68		177
69	INLINE SV *	178	ecb_inline SV *
70	get_bool (const char *name)	179	get_bool (const char *name)
71	{	180	{
72	SV *sv = get_sv (name, 1);	181	SV *sv = get_sv (name, 1);
73		182
74	SvREADONLY_on (sv);	183	SvREADONLY_on (sv);
75	SvREADONLY_on (SvRV (sv));	184	SvREADONLY_on (SvRV (sv));
76		185
77	return sv;	186	return sv;
78	}	187	}
79		188
80	INLINE void	189	ecb_inline void
81	shrink (SV *sv)	190	shrink (SV *sv)
82	{	191	{
83	sv_utf8_downgrade (sv, 1);	192	sv_utf8_downgrade (sv, 1);
84		193
85	if (SvLEN (sv) > SvCUR (sv) + 1)	194	if (SvLEN (sv) > SvCUR (sv) + 1)
…		…
90	SvPV_renew (sv, SvCUR (sv) + 1);	199	SvPV_renew (sv, SvCUR (sv) + 1);
91	#endif	200	#endif
92	}	201	}
93	}	202	}
94		203
95	/////////////////////////////////////////////////////////////////////////////	204	// minimum length of a string to be registered for stringref
96	// fp hell	205	ecb_inline int
97		206	minimum_string_length (UV idx)
98	//TODO	207	{
		208	return idx <= 23 ? 3
		209	: idx <= 0xffU ? 4
		210	: idx <= 0xffffU ? 5
		211	: idx <= 0xffffffffU ? 7
		212	: 11;
		213	}
99		214
100	/////////////////////////////////////////////////////////////////////////////	215	/////////////////////////////////////////////////////////////////////////////
101	// encoder	216	// encoder
102		217
103	// structure used for encoding CBOR	218	// structure used for encoding CBOR
…		…
106	char *cur; // SvPVX (sv) + current output position	221	char *cur; // SvPVX (sv) + current output position
107	char *end; // SvEND (sv)	222	char *end; // SvEND (sv)
108	SV *sv; // result scalar	223	SV *sv; // result scalar
109	CBOR cbor;	224	CBOR cbor;
110	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;
111	} enc_t;	230	} enc_t;
112		231
113	INLINE void	232	ecb_inline void
114	need (enc_t *enc, STRLEN len)	233	need (enc_t *enc, STRLEN len)
115	{	234	{
116	if (expect_false (enc->cur + len >= enc->end))	235	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
117	{	236	{
118	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	237	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
119	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	238	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
120	enc->cur = SvPVX (enc->sv) + cur;	239	enc->cur = SvPVX (enc->sv) + cur;
121	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	240	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
122	}	241	}
123	}	242	}
124		243
125	INLINE void	244	ecb_inline void
126	encode_ch (enc_t *enc, char ch)	245	encode_ch (enc_t *enc, char ch)
127	{	246	{
128	need (enc, 1);	247	need (enc, 1);
129	*enc->cur++ = ch;	248	*enc->cur++ = ch;
130	}	249	}
131		250
		251	// used for tags, intregers, element counts and so on
132	static void	252	static void
133	encode_uint (enc_t *enc, int major, UV len)	253	encode_uint (enc_t *enc, int major, UV len)
134	{	254	{
135	need (enc, 9);	255	need (enc, 9);
136		256
137	if (len < 24)	257	if (ecb_expect_true (len < LENGTH_EXT1))
138	*enc->cur++ = major | len;	258	*enc->cur++ = major | len;
139	else if (len <= 0xff)	259	else if (ecb_expect_true (len <= 0xffU))
140	{	260	{
141	*enc->cur++ = major | 24;	261	*enc->cur++ = major | LENGTH_EXT1;
142	*enc->cur++ = len;	262	*enc->cur++ = len;
143	}	263	}
144	else if (len <= 0xffff)	264	else if (len <= 0xffffU)
145	{	265	{
146	*enc->cur++ = major | 25;	266	*enc->cur++ = major | LENGTH_EXT2;
147	*enc->cur++ = len >> 8;	267	*enc->cur++ = len >> 8;
148	*enc->cur++ = len;	268	*enc->cur++ = len;
149	}	269	}
150	else if (len <= 0xffffffff)	270	else if (len <= 0xffffffffU)
151	{	271	{
152	*enc->cur++ = major | 26;	272	*enc->cur++ = major | LENGTH_EXT4;
153	*enc->cur++ = len >> 24;	273	*enc->cur++ = len >> 24;
154	*enc->cur++ = len >> 16;	274	*enc->cur++ = len >> 16;
155	*enc->cur++ = len >> 8;	275	*enc->cur++ = len >> 8;
156	*enc->cur++ = len;	276	*enc->cur++ = len;
157	}	277	}
158	else	278	else
159	{	279	{
160	*enc->cur++ = major | 27;	280	*enc->cur++ = major | LENGTH_EXT8;
161	*enc->cur++ = len >> 56;	281	*enc->cur++ = len >> 56;
162	*enc->cur++ = len >> 48;	282	*enc->cur++ = len >> 48;
163	*enc->cur++ = len >> 40;	283	*enc->cur++ = len >> 40;
164	*enc->cur++ = len >> 32;	284	*enc->cur++ = len >> 32;
165	*enc->cur++ = len >> 24;	285	*enc->cur++ = len >> 24;
…		…
167	*enc->cur++ = len >> 8;	287	*enc->cur++ = len >> 8;
168	*enc->cur++ = len;	288	*enc->cur++ = len;
169	}	289	}
170	}	290	}
171		291
172	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
173	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	312	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
174	{	313	{
175	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);
176	need (enc, len);	344	need (enc, len);
177	memcpy (enc->cur, str, len);	345	memcpy (enc->cur, str, len);
178	enc->cur += len;	346	enc->cur += len;
179	}	347	}
180		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_forced (enc_t *enc, UV type, SV *sv)
		424	{
		425	switch (type)
		426	{
		427	case AS_CBOR:
		428	{
		429	STRLEN len;
		430	char *str = SvPVbyte (sv, len);
		431
		432	need (enc, len);
		433	memcpy (enc->cur, str, len);
		434	enc->cur += len;
		435	}
		436	break;
		437
		438	case AS_BYTES:
		439	{
		440	STRLEN len;
		441	char *str = SvPVbyte (sv, len);
		442	encode_strref (enc, 0, 0, str, len);
		443	}
		444	break;
		445
		446	case AS_TEXT:
		447	{
		448	STRLEN len;
		449	char *str = SvPVutf8 (sv, len);
		450	encode_strref (enc, 1, 1, str, len);
		451	}
		452	break;
		453
		454	case AS_INT: encode_int (enc, sv); break;
		455	case AS_FLOAT16: encode_float16 (enc, SvNV (sv)); break;
		456	case AS_FLOAT32: encode_float32 (enc, SvNV (sv)); break;
		457	case AS_FLOAT64: encode_float64 (enc, SvNV (sv)); break;
		458
		459	default:
		460	croak ("encountered malformed CBOR::XS::Tagged object");
		461	}
		462	}
		463
181	static void encode_sv (enc_t *enc, SV *sv);	464	static void encode_sv (enc_t *enc, SV *sv);
182		465
183	static void	466	static void
184	encode_av (enc_t *enc, AV *av)	467	encode_av (enc_t *enc, AV *av)
185	{	468	{
…		…
188	if (enc->depth >= enc->cbor.max_depth)	471	if (enc->depth >= enc->cbor.max_depth)
189	croak (ERR_NESTING_EXCEEDED);	472	croak (ERR_NESTING_EXCEEDED);
190		473
191	++enc->depth;	474	++enc->depth;
192		475
193	encode_uint (enc, 0x80, len + 1);	476	encode_uint (enc, MAJOR_ARRAY, len + 1);
194		477
		478	if (ecb_expect_false (SvMAGICAL (av)))
195	for (i = 0; i <= len; ++i)	479	for (i = 0; i <= len; ++i)
196	{	480	{
197	SV **svp = av_fetch (av, i, 0);	481	SV **svp = av_fetch (av, i, 0);
198	encode_sv (enc, svp ? *svp : &PL_sv_undef);	482	encode_sv (enc, svp ? *svp : &PL_sv_undef);
199	}	483	}
		484	else
		485	for (i = 0; i <= len; ++i)
		486	{
		487	SV *sv = AvARRAY (av)[i];
		488	encode_sv (enc, sv ? sv : &PL_sv_undef);
		489	}
200		490
201	--enc->depth;	491	--enc->depth;
202	}	492	}
203		493
204	static void	494	static void
…		…
212	++enc->depth;	502	++enc->depth;
213		503
214	int pairs = hv_iterinit (hv);	504	int pairs = hv_iterinit (hv);
215	int mg = SvMAGICAL (hv);	505	int mg = SvMAGICAL (hv);
216		506
217	if (mg)	507	if (ecb_expect_false (mg))
218	encode_ch (enc, 0xa0 | 31);	508	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
219	else	509	else
220	encode_uint (enc, 0xa0, pairs);	510	encode_uint (enc, MAJOR_MAP, pairs);
221		511
222	while ((he = hv_iternext (hv)))	512	while ((he = hv_iternext (hv)))
223	{	513	{
224	if (HeKLEN (he) == HEf_SVKEY)	514	if (HeKLEN (he) == HEf_SVKEY)
225	encode_sv (enc, HeSVKEY (he));	515	encode_sv (enc, HeSVKEY (he));
226	else	516	else
227	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	517	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
228		518
229	encode_sv (enc, expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	519	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
230	}	520	}
231		521
232	if (mg)	522	if (ecb_expect_false (mg))
233	encode_ch (enc, 0xe0 | 31);	523	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
234		524
235	--enc->depth;	525	--enc->depth;
236	}	526	}
237		527
238	// encode objects, arrays and special \0=false and \1=true values.	528	// encode objects, arrays and special \0=false and \1=true values.
239	static void	529	static void
240	encode_rv (enc_t *enc, SV *sv)	530	encode_rv (enc_t *enc, SV *sv)
241	{	531	{
242	svtype svt;
243
244	SvGETMAGIC (sv);	532	SvGETMAGIC (sv);
		533
245	svt = SvTYPE (sv);	534	svtype svt = SvTYPE (sv);
246		535
247	if (expect_false (SvOBJECT (sv)))	536	if (ecb_expect_false (SvOBJECT (sv)))
248	{	537	{
249	HV *stash = !CBOR_SLOW || cbor_boolean_stash	538	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
250	? cbor_boolean_stash	539	? types_boolean_stash
		540	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		541	HV *error_stash = !CBOR_SLOW || types_error_stash
		542	? types_error_stash
		543	: gv_stashpv ("Types::Serialiser::Error", 1);
		544	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		545	? cbor_tagged_stash
251	: gv_stashpv ("CBOR::XS::Boolean", 1);	546	: gv_stashpv ("CBOR::XS::Tagged" , 1);
252		547
253	if (SvSTASH (sv) == stash)	548	HV *stash = SvSTASH (sv);
254	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	549
		550	if (stash == boolean_stash)
		551	{
		552	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		553	return;
		554	}
		555	else if (stash == error_stash)
		556	{
		557	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		558	return;
		559	}
		560	else if (stash == tagged_stash)
		561	{
		562	if (svt != SVt_PVAV)
		563	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		564
		565	switch (av_len ((AV *)sv))
		566	{
		567	case 2-1:
		568	// actually a tagged value
		569	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
		570	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		571	break;
		572
		573	case 3-1:
		574	// a forced type [value, type, undef]
		575	encode_forced (enc, SvUV (*av_fetch ((AV *)sv, 1, 1)), *av_fetch ((AV *)sv, 0, 1));
		576	break;
		577
		578	default:
		579	croak ("encountered malformed CBOR::XS::Tagged object");
		580	}
		581
		582	return;
		583	}
		584	}
		585
		586	if (ecb_expect_false (SvREFCNT (sv) > 1)
		587	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		588	{
		589	if (ecb_expect_false (!enc->shareable))
		590	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		591
		592	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		593
		594	if (SvOK (*svp))
		595	{
		596	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		597	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		598	return;
		599	}
255	else	600	else
256	{	601	{
257	#if 0 //TODO	602	sv_setuv (*svp, enc->shareable_idx);
258	if (enc->cbor.flags & F_CONV_BLESSED)	603	++enc->shareable_idx;
		604	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		605	}
		606	}
		607
		608	if (ecb_expect_false (SvOBJECT (sv)))
		609	{
		610	HV *stash = SvSTASH (sv);
		611	GV *method;
		612
		613	if (enc->cbor.flags & F_FORBID_OBJECTS)
		614	croak ("encountered object '%s', but forbid_objects is enabled",
		615	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		616	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
259	{	617	{
		618	dSP;
		619
		620	ENTER; SAVETMPS;
		621	PUSHMARK (SP);
260	// we re-bless the reference to get overload and other niceties right	622	// we re-bless the reference to get overload and other niceties right
261	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
262
263	if (to_cbor)
264	{
265	dSP;
266
267	ENTER; SAVETMPS; PUSHMARK (SP);
268	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	623	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
269		624
270	// calling with G_SCALAR ensures that we always get a 1 return value
271	PUTBACK;	625	PUTBACK;
		626	// G_SCALAR ensures that return value is 1
272	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	627	call_sv ((SV *)GvCV (method), G_SCALAR);
273	SPAGAIN;	628	SPAGAIN;
274		629
275	// catch this surprisingly common error	630	// catch this surprisingly common error
276	if (SvROK (TOPs) && SvRV (TOPs) == sv)	631	if (SvROK (TOPs) && SvRV (TOPs) == sv)
277	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	632	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
278		633
279	sv = POPs;
280	PUTBACK;
281
282	encode_sv (enc, sv);	634	encode_sv (enc, POPs);
283		635
		636	PUTBACK;
		637
284	FREETMPS; LEAVE;	638	FREETMPS; LEAVE;
285	}	639	}
286	else if (enc->cbor.flags & F_ALLOW_BLESSED)	640	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
287	encode_str (enc, "null", 4, 0);	641	{
288	else	642	dSP;
289	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it",	643
290	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	644	ENTER; SAVETMPS;
		645	PUSHMARK (SP);
		646	EXTEND (SP, 2);
		647	// we re-bless the reference to get overload and other niceties right
		648	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		649	PUSHs (sv_cbor);
		650
		651	PUTBACK;
		652	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		653	SPAGAIN;
		654
		655	// catch this surprisingly common error
		656	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		657	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		658
		659	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		660	encode_uint (enc, MAJOR_ARRAY, count + 1);
		661	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		662
		663	{
		664	int i;
		665
		666	for (i = 0; i < count; ++i)
		667	encode_sv (enc, SP[i + 1 - count]);
		668
		669	SP -= count;
291	}	670	}
292	else if (enc->cbor.flags & F_ALLOW_BLESSED)	671
293	encode_str (enc, "null", 4, 0);	672	PUTBACK;
		673
		674	FREETMPS; LEAVE;
		675	}
294	else	676	else
295	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	677	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
296	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	678	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
297	#endif
298	}
299	}	679	}
300	else if (svt == SVt_PVHV)	680	else if (svt == SVt_PVHV)
301	encode_hv (enc, (HV *)sv);	681	encode_hv (enc, (HV *)sv);
302	else if (svt == SVt_PVAV)	682	else if (svt == SVt_PVAV)
303	encode_av (enc, (AV *)sv);	683	encode_av (enc, (AV *)sv);
304	else if (svt < SVt_PVAV)
305	{
306	STRLEN len = 0;
307	char *pv = svt ? SvPV (sv, len) : 0;
308
309	if (len == 1 && *pv == '1')
310	encode_ch (enc, 0xe0 | 21);
311	else if (len == 1 && *pv == '0')
312	encode_ch (enc, 0xe0 | 20);
313	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
314	encode_ch (enc, 0xe0 | 23);
315	else
316	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
317	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
318	}
319	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
320	encode_ch (enc, 0xe0 | 23);
321	else	684	else
322	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	685	{
323	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	686	encode_tag (enc, CBOR_TAG_INDIRECTION);
		687	encode_sv (enc, sv);
		688	}
324	}	689	}
325		690
326	static void	691	static void
327	encode_nv (enc_t *enc, SV *sv)	692	encode_nv (enc_t *enc, SV *sv)
328	{	693	{
329	double nv = SvNVX (sv);	694	double nv = SvNVX (sv);
330		695
331	need (enc, 9);	696	need (enc, 9);
332		697
333	if (expect_false (nv == (U32)nv))	698	if (ecb_expect_false (nv == (NV)(U32)nv))
334	encode_uint (enc, 0x00, (U32)nv);	699	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
335	//TODO: maybe I32?	700	//TODO: maybe I32?
336	else if (expect_false (nv == (float)nv))	701	else if (ecb_expect_false (nv == (float)nv))
337	{	702	encode_float32 (enc, nv);
338	uint32_t fp = ecb_float_to_binary32 (nv);
339
340	*enc->cur++ = 0xe0 | 26;
341
342	if (!ecb_big_endian ())
343	fp = ecb_bswap32 (fp);
344
345	memcpy (enc->cur, &fp, 4);
346	enc->cur += 4;
347	}
348	else	703	else
349	{	704	encode_float64 (enc, nv);
350	uint64_t fp = ecb_double_to_binary64 (nv);
351
352	*enc->cur++ = 0xe0 | 27;
353
354	if (!ecb_big_endian ())
355	fp = ecb_bswap64 (fp);
356
357	memcpy (enc->cur, &fp, 8);
358	enc->cur += 8;
359	}
360	}	705	}
361		706
362	static void	707	static void
363	encode_sv (enc_t *enc, SV *sv)	708	encode_sv (enc_t *enc, SV *sv)
364	{	709	{
…		…
366		711
367	if (SvPOKp (sv))	712	if (SvPOKp (sv))
368	{	713	{
369	STRLEN len;	714	STRLEN len;
370	char *str = SvPV (sv, len);	715	char *str = SvPV (sv, len);
371	encode_str (enc, SvUTF8 (sv), str, len);	716	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
372	}	717	}
373	else if (SvNOKp (sv))	718	else if (SvNOKp (sv))
374	encode_nv (enc, sv);	719	encode_nv (enc, sv);
375	else if (SvIOKp (sv))	720	else if (SvIOKp (sv))
376	{	721	encode_int (enc, sv);
377	if (SvIsUV (sv))
378	encode_uint (enc, 0x00, SvUVX (sv));
379	else if (SvIVX (sv) >= 0)
380	encode_uint (enc, 0x00, SvIVX (sv));
381	else
382	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
383	}
384	else if (SvROK (sv))	722	else if (SvROK (sv))
385	encode_rv (enc, SvRV (sv));	723	encode_rv (enc, SvRV (sv));
386	else if (!SvOK (sv))	724	else if (!SvOK (sv))
387	encode_ch (enc, 0xe0 | 22);	725	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
388	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	726	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
389	encode_ch (enc, 0xe0 | 23);	727	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
390	else	728	else
391	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	729	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
392	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	730	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
393	}	731	}
394		732
395	static SV *	733	static SV *
396	encode_cbor (SV *scalar, CBOR *cbor)	734	encode_cbor (SV *scalar, CBOR *cbor)
397	{	735	{
398	enc_t enc;	736	enc_t enc = { 0 };
399		737
400	enc.cbor = *cbor;	738	enc.cbor = *cbor;
401	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	739	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
402	enc.cur = SvPVX (enc.sv);	740	enc.cur = SvPVX (enc.sv);
403	enc.end = SvEND (enc.sv);	741	enc.end = SvEND (enc.sv);
404	enc.depth = 0;
405		742
406	SvPOK_only (enc.sv);	743	SvPOK_only (enc.sv);
		744
		745	if (cbor->flags & F_PACK_STRINGS)
		746	{
		747	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		748	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		749	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		750	}
		751
407	encode_sv (&enc, scalar);	752	encode_sv (&enc, scalar);
408		753
409	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	754	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
410	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	755	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
411		756
…		…
425	U8 *end; // end of input string	770	U8 *end; // end of input string
426	const char *err; // parse error, if != 0	771	const char *err; // parse error, if != 0
427	CBOR cbor;	772	CBOR cbor;
428	U32 depth; // recursion depth	773	U32 depth; // recursion depth
429	U32 maxdepth; // recursion depth limit	774	U32 maxdepth; // recursion depth limit
		775	AV *shareable;
		776	AV *stringref;
		777	SV *decode_tagged;
		778	SV *err_sv; // optional sv for error, needs to be freed
430	} dec_t;	779	} dec_t;
431		780
432	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	781	// set dec->err to ERRSV
		782	ecb_cold static void
		783	err_errsv (dec_t *dec)
		784	{
		785	if (!dec->err)
		786	{
		787	dec->err_sv = newSVsv (ERRSV);
433		788
434	#define WANT(len) if (expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data");	789	// chop off the trailing \n
		790	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		791	*SvEND (dec->err_sv) = 0;
435		792
		793	dec->err = SvPVutf8_nolen (dec->err_sv);
		794	}
		795	}
		796
		797	// the following functions are used to reduce code size and help the compiler to optimise
		798	ecb_cold static void
		799	err_set (dec_t *dec, const char *reason)
		800	{
		801	if (!dec->err)
		802	dec->err = reason;
		803	}
		804
		805	ecb_cold static void
		806	err_unexpected_end (dec_t *dec)
		807	{
		808	err_set (dec, "unexpected end of CBOR data");
		809	}
		810
		811	#define ERR_DO(do) SB do; goto fail; SE
		812	#define ERR(reason) ERR_DO (err_set (dec, reason))
		813	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		814
		815	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		816
436	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	817	#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED)
437	#define DEC_DEC_DEPTH --dec->depth	818	#define DEC_DEC_DEPTH --dec->depth
438		819
439	static UV	820	static UV
440	decode_uint (dec_t *dec)	821	decode_uint (dec_t *dec)
441	{	822	{
442	switch (*dec->cur & 31)	823	U8 m = *dec->cur & MINOR_MASK;
443	{	824	++dec->cur;
444	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
445	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
446	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
447	return *dec->cur++ & 31;
448		825
449	case 24:	826	if (ecb_expect_true (m < LENGTH_EXT1))
		827	return m;
		828	else if (ecb_expect_true (m == LENGTH_EXT1))
		829	{
450	WANT (2);	830	WANT (1);
451	dec->cur += 2;	831	dec->cur += 1;
452	return dec->cur[-1];	832	return dec->cur[-1];
453		833	}
454	case 25:	834	else if (ecb_expect_true (m == LENGTH_EXT2))
		835	{
455	WANT (3);	836	WANT (2);
456	dec->cur += 3;	837	dec->cur += 2;
457	return (((UV)dec->cur[-2]) << 8)	838	return (((UV)dec->cur[-2]) << 8)
458	| ((UV)dec->cur[-1]);	839	| ((UV)dec->cur[-1]);
459		840	}
460	case 26:	841	else if (ecb_expect_true (m == LENGTH_EXT4))
		842	{
461	WANT (5);	843	WANT (4);
462	dec->cur += 5;	844	dec->cur += 4;
463	return (((UV)dec->cur[-4]) << 24)	845	return (((UV)dec->cur[-4]) << 24)
464	| (((UV)dec->cur[-3]) << 16)	846	| (((UV)dec->cur[-3]) << 16)
465	| (((UV)dec->cur[-2]) << 8)	847	| (((UV)dec->cur[-2]) << 8)
466	| ((UV)dec->cur[-1]);	848	| ((UV)dec->cur[-1]);
467		849	}
468	case 27:	850	else if (ecb_expect_true (m == LENGTH_EXT8))
		851	{
469	WANT (9);	852	WANT (8);
470	dec->cur += 9;	853	dec->cur += 8;
		854
		855	return
		856	#if UVSIZE < 8
		857	0
		858	#else
471	return (((UV)dec->cur[-8]) << 56)	859	(((UV)dec->cur[-8]) << 56)
472	| (((UV)dec->cur[-7]) << 48)	860	| (((UV)dec->cur[-7]) << 48)
473	| (((UV)dec->cur[-6]) << 40)	861	| (((UV)dec->cur[-6]) << 40)
474	| (((UV)dec->cur[-5]) << 32)	862	| (((UV)dec->cur[-5]) << 32)
		863	#endif
475	| (((UV)dec->cur[-4]) << 24)	864	| (((UV)dec->cur[-4]) << 24)
476	| (((UV)dec->cur[-3]) << 16)	865	| (((UV)dec->cur[-3]) << 16)
477	| (((UV)dec->cur[-2]) << 8)	866	| (((UV)dec->cur[-2]) << 8)
478	| ((UV)dec->cur[-1]);	867	| ((UV)dec->cur[-1]);
479		868	}
480	default:	869	else
481	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	870	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
482	}
483		871
484	fail:	872	fail:
485	return 0;	873	return 0;
486	}	874	}
487		875
…		…
492	{	880	{
493	AV *av = newAV ();	881	AV *av = newAV ();
494		882
495	DEC_INC_DEPTH;	883	DEC_INC_DEPTH;
496		884
497	if ((*dec->cur & 31) == 31)	885	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
498	{	886	{
499	++dec->cur;	887	++dec->cur;
500		888
501	for (;;)	889	for (;;)
502	{	890	{
503	WANT (1);	891	WANT (1);
504		892
505	if (*dec->cur == (0xe0 | 31))	893	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
506	{	894	{
507	++dec->cur;	895	++dec->cur;
508	break;	896	break;
509	}	897	}
510		898
511	av_push (av, decode_sv (dec));	899	av_push (av, decode_sv (dec));
512	}	900	}
513	}	901	}
514	else	902	else
515	{	903	{
516	int i, len = decode_uint (dec);	904	UV i, len = decode_uint (dec);
517		905
		906	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
518	av_fill (av, len - 1);	907	av_fill (av, len - 1);
519		908
520	for (i = 0; i < len; ++i)	909	for (i = 0; i < len; ++i)
521	AvARRAY (av)[i] = decode_sv (dec);	910	AvARRAY (av)[i] = decode_sv (dec);
522	}	911	}
523		912
524	DEC_DEC_DEPTH;	913	DEC_DEC_DEPTH;
525	return newRV_noinc ((SV *)av);	914	return newRV_noinc ((SV *)av);
526		915
527	fail:	916	fail:
528	SvREFCNT_dec (av);	917	SvREFCNT_dec_NN (av);
529	DEC_DEC_DEPTH;	918	DEC_DEC_DEPTH;
530	return &PL_sv_undef;	919	return &PL_sv_undef;
531	}	920	}
532		921
		922	static void
		923	decode_he (dec_t *dec, HV *hv)
		924	{
		925	// for speed reasons, we specialcase single-string
		926	// byte or utf-8 strings as keys, but only when !stringref
		927
		928	if (ecb_expect_true (!dec->stringref))
		929	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		930	{
		931	STRLEN len = decode_uint (dec);
		932	char *key = (char *)dec->cur;
		933
		934	WANT (len);
		935	dec->cur += len;
		936
		937	hv_store (hv, key, len, decode_sv (dec), 0);
		938
		939	return;
		940	}
		941	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		942	{
		943	STRLEN len = decode_uint (dec);
		944	char *key = (char *)dec->cur;
		945
		946	WANT (len);
		947	dec->cur += len;
		948
		949	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		950	if (!is_utf8_string (key, len))
		951	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		952
		953	hv_store (hv, key, -len, decode_sv (dec), 0);
		954
		955	return;
		956	}
		957
		958	SV *k = decode_sv (dec);
		959	SV *v = decode_sv (dec);
		960
		961	// we leak memory if uncaught exceptions are thrown by random magical
		962	// methods, and this is hopefully the only place where it can happen,
		963	// so if there is a chance of an exception, take the very slow path.
		964	// since catching exceptions is "undocumented/internal/forbidden" by
		965	// the new p5p powers, we need to call out to a perl function :/
		966	if (ecb_expect_false (SvAMAGIC (k)))
		967	{
		968	dSP;
		969
		970	ENTER; SAVETMPS;
		971	PUSHMARK (SP);
		972	EXTEND (SP, 3);
		973	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		974	PUSHs (sv_2mortal (k));
		975	PUSHs (sv_2mortal (v));
		976
		977	PUTBACK;
		978	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		979	SPAGAIN;
		980
		981	FREETMPS; LEAVE;
		982
		983	if (SvTRUE (ERRSV))
		984	ERR_ERRSV;
		985
		986	return;
		987	}
		988
		989	hv_store_ent (hv, k, v, 0);
		990	SvREFCNT_dec_NN (k);
		991
		992	fail:
		993	;
		994	}
		995
533	static SV *	996	static SV *
534	decode_hv (dec_t *dec)	997	decode_hv (dec_t *dec)
535	{	998	{
536	HV *hv = newHV ();	999	HV *hv = newHV ();
537		1000
538	DEC_INC_DEPTH;	1001	DEC_INC_DEPTH;
539		1002
540	if ((*dec->cur & 31) == 31)	1003	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
541	{	1004	{
542	++dec->cur;	1005	++dec->cur;
543		1006
544	for (;;)	1007	for (;;)
545	{	1008	{
546	WANT (1);	1009	WANT (1);
547		1010
548	if (*dec->cur == (0xe0 | 31))	1011	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
549	{	1012	{
550	++dec->cur;	1013	++dec->cur;
551	break;	1014	break;
552	}	1015	}
553		1016
554	SV *k = decode_sv (dec);	1017	decode_he (dec, hv);
555	SV *v = decode_sv (dec);
556
557	hv_store_ent (hv, k, v, 0);
558	}	1018	}
559	}	1019	}
560	else	1020	else
561	{	1021	{
562	int len = decode_uint (dec);	1022	UV pairs = decode_uint (dec);
563		1023
		1024	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1025
564	while (len--)	1026	while (pairs--)
565	{	1027	decode_he (dec, hv);
566	SV *k = decode_sv (dec);
567	SV *v = decode_sv (dec);
568
569	hv_store_ent (hv, k, v, 0);
570	}
571	}	1028	}
572		1029
573	DEC_DEC_DEPTH;	1030	DEC_DEC_DEPTH;
574	return newRV_noinc ((SV *)hv);	1031	return newRV_noinc ((SV *)hv);
575		1032
576	#if 0	1033	fail:
577	SV *sv;	1034	SvREFCNT_dec_NN (hv);
578	HV *hv = newHV ();
579
580	DEC_INC_DEPTH;	1035	DEC_DEC_DEPTH;
581	decode_ws (dec);	1036	return &PL_sv_undef;
		1037	}
582		1038
583	for (;;)	1039	static SV *
584	{	1040	decode_str (dec_t *dec, int utf8)
585	// heuristic: assume that	1041	{
586	// a) decode_str + hv_store_ent are abysmally slow.	1042	SV *sv = 0;
587	// b) most hash keys are short, simple ascii text.	1043
588	// => try to "fast-match" such strings to avoid	1044	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
589	// the overhead of decode_str + hv_store_ent.
590	{	1045	{
591	SV *value;	1046	// indefinite length strings
592	char *p = dec->cur;	1047	++dec->cur;
593	char *e = p + 24; // only try up to 24 bytes
594		1048
		1049	U8 major = *dec->cur & MAJOR_MISC;
		1050
		1051	sv = newSVpvn ("", 0);
		1052
595	for (;;)	1053	for (;;)
596	{	1054	{
597	// the >= 0x80 is false on most architectures	1055	WANT (1);
598	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')	1056
		1057	if ((*dec->cur - major) > LENGTH_EXT8)
		1058	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
599	{	1059	{
600	// slow path, back up and use decode_str	1060	++dec->cur;
601	SV *key = decode_str (dec);
602	if (!key)
603	goto fail;
604
605	decode_ws (dec); EXPECT_CH (':');
606
607	decode_ws (dec);
608	value = decode_sv (dec);
609	if (!value)
610	{
611	SvREFCNT_dec (key);
612	goto fail;
613	}
614
615	hv_store_ent (hv, key, value, 0);
616	SvREFCNT_dec (key);
617
618	break;	1061	break;
619	}	1062	}
620	else if (*p == '"')
621	{
622	// fast path, got a simple key
623	char *key = dec->cur;
624	int len = p - key;
625	dec->cur = p + 1;
626
627	decode_ws (dec); EXPECT_CH (':');
628
629	decode_ws (dec);
630	value = decode_sv (dec);
631	if (!value)
632	goto fail;
633
634	hv_store (hv, key, len, value, 0);
635
636	break;
637	}
638
639	++p;
640	}
641	}
642
643	decode_ws (dec);
644
645	if (*dec->cur == '}')
646	{
647	++dec->cur;
648	break;
649	}
650
651	if (*dec->cur != ',')
652	ERR (", or } expected while parsing object/hash");
653
654	++dec->cur;
655
656	decode_ws (dec);
657
658	if (*dec->cur == '}' && dec->cbor.flags & F_RELAXED)
659	{
660	++dec->cur;
661	break;
662	}
663	}
664
665	DEC_DEC_DEPTH;
666	sv = newRV_noinc ((SV *)hv);
667
668	// check filter callbacks
669	if (dec->cbor.flags & F_HOOK)
670	{
671	if (dec->cbor.cb_sk_object && HvKEYS (hv) == 1)
672	{
673	HE *cb, *he;
674
675	hv_iterinit (hv);
676	he = hv_iternext (hv);
677	hv_iterinit (hv);
678
679	// the next line creates a mortal sv each time its called.
680	// might want to optimise this for common cases.
681	cb = hv_fetch_ent (dec->cbor.cb_sk_object, hv_iterkeysv (he), 0, 0);
682
683	if (cb)
684	{	1063	else
685	dSP;	1064	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
686	int count;
687		1065
688	ENTER; SAVETMPS; PUSHMARK (SP);	1066	STRLEN len = decode_uint (dec);
689	XPUSHs (HeVAL (he));
690	sv_2mortal (sv);
691		1067
692	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
693
694	if (count == 1)
695	{
696	sv = newSVsv (POPs);
697	FREETMPS; LEAVE;
698	return sv;
699	}
700
701	SvREFCNT_inc (sv);
702	FREETMPS; LEAVE;
703	}
704	}
705
706	if (dec->cbor.cb_object)
707	{
708	dSP;
709	int count;
710
711	ENTER; SAVETMPS; PUSHMARK (SP);
712	XPUSHs (sv_2mortal (sv));
713
714	PUTBACK; count = call_sv (dec->cbor.cb_object, G_ARRAY); SPAGAIN;
715
716	if (count == 1)
717	{
718	sv = newSVsv (POPs);
719	FREETMPS; LEAVE;
720	return sv;
721	}
722
723	SvREFCNT_inc (sv);
724	FREETMPS; LEAVE;
725	}
726	}
727
728	return sv;
729	#endif
730
731	fail:
732	SvREFCNT_dec (hv);
733	DEC_DEC_DEPTH;
734	return &PL_sv_undef;
735	}
736
737	static SV *
738	decode_str (dec_t *dec, int utf8)
739	{
740	SV *sv;
741
742	if ((*dec->cur & 31) == 31)
743	{
744	++dec->cur;
745
746	sv = newSVpvn ("", 0);
747
748	// not very fast, and certainly not robust against illegal input
749	for (;;)
750	{
751	WANT (1);	1068	WANT (len);
752		1069	sv_catpvn (sv, dec->cur, len);
753	if (*dec->cur == (0xe0 | 31))	1070	dec->cur += len;
754	{
755	++dec->cur;
756	break;
757	}
758
759	SV *sv2 = decode_sv (dec);
760	sv_catsv (sv, sv2);
761	}	1071	}
762	}	1072	}
763	else	1073	else
764	{	1074	{
765	STRLEN len = decode_uint (dec);	1075	STRLEN len = decode_uint (dec);
766		1076
767	WANT (len);	1077	WANT (len);
768	sv = newSVpvn (dec->cur, len);	1078	sv = newSVpvn (dec->cur, len);
769	dec->cur += len;	1079	dec->cur += len;
		1080
		1081	if (ecb_expect_false (dec->stringref)
		1082	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		1083	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
770	}	1084	}
771		1085
772	if (utf8)	1086	if (utf8)
		1087	{
		1088	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		1089	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		1090	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		1091
773	SvUTF8_on (sv);	1092	SvUTF8_on (sv);
		1093	}
774		1094
775	return sv;	1095	return sv;
776		1096
777	fail:	1097	fail:
		1098	SvREFCNT_dec (sv);
778	return &PL_sv_undef;	1099	return &PL_sv_undef;
779	}	1100	}
780		1101
781	static SV *	1102	static SV *
782	decode_tagged (dec_t *dec)	1103	decode_tagged (dec_t *dec)
783	{	1104	{
		1105	SV *sv = 0;
784	UV tag = decode_uint (dec);	1106	UV tag = decode_uint (dec);
		1107
		1108	WANT (1);
		1109
		1110	switch (tag)
		1111	{
		1112	case CBOR_TAG_MAGIC:
785	SV *sv = decode_sv (dec);	1113	sv = decode_sv (dec);
		1114	break;
786		1115
787	if (tag == 55799) // 2.4.5 Self-Describe CBOR	1116	case CBOR_TAG_INDIRECTION:
		1117	sv = newRV_noinc (decode_sv (dec));
		1118	break;
		1119
		1120	case CBOR_TAG_STRINGREF_NAMESPACE:
		1121	{
		1122	// do not use SAVETMPS/FREETMPS, as these will
		1123	// erase mortalised caches, e.g. "shareable"
		1124	ENTER;
		1125
		1126	SAVESPTR (dec->stringref);
		1127	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1128
		1129	sv = decode_sv (dec);
		1130
		1131	LEAVE;
		1132	}
		1133	break;
		1134
		1135	case CBOR_TAG_STRINGREF:
		1136	{
		1137	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1138	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1139
		1140	UV idx = decode_uint (dec);
		1141
		1142	if (!dec->stringref || idx >= (UV)(1 + AvFILLp (dec->stringref)))
		1143	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1144
		1145	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1146	}
		1147	break;
		1148
		1149	case CBOR_TAG_VALUE_SHAREABLE:
		1150	{
		1151	if (ecb_expect_false (!dec->shareable))
		1152	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1153
		1154	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1155	{
		1156	sv = newSV (0);
		1157	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1158
		1159	SV *osv = decode_sv (dec);
		1160	sv_setsv (sv, osv);
		1161	SvREFCNT_dec_NN (osv);
		1162	}
		1163	else
		1164	{
		1165	av_push (dec->shareable, &PL_sv_undef);
		1166	int idx = AvFILLp (dec->shareable);
		1167	sv = decode_sv (dec);
		1168	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1169	}
		1170	}
		1171	break;
		1172
		1173	case CBOR_TAG_VALUE_SHAREDREF:
		1174	{
		1175	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1176	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1177
		1178	UV idx = decode_uint (dec);
		1179
		1180	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
		1181	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1182
		1183	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1184
		1185	if (sv == &PL_sv_undef)
		1186	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1187	}
		1188	break;
		1189
		1190	case CBOR_TAG_PERL_OBJECT:
		1191	{
		1192	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1193	goto filter;
		1194
		1195	sv = decode_sv (dec);
		1196
		1197	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1198	ERR ("corrupted CBOR data (non-array perl object)");
		1199
		1200	AV *av = (AV *)SvRV (sv);
		1201	int len = av_len (av) + 1;
		1202	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1203
		1204	if (!stash)
		1205	ERR ("cannot decode perl-object (package does not exist)");
		1206
		1207	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1208
		1209	if (!method)
		1210	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1211
		1212	dSP;
		1213
		1214	ENTER; SAVETMPS;
		1215	PUSHMARK (SP);
		1216	EXTEND (SP, len + 1);
		1217	// we re-bless the reference to get overload and other niceties right
		1218	PUSHs (*av_fetch (av, 0, 1));
		1219	PUSHs (sv_cbor);
		1220
		1221	int i;
		1222
		1223	for (i = 1; i < len; ++i)
		1224	PUSHs (*av_fetch (av, i, 1));
		1225
		1226	PUTBACK;
		1227	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1228	SPAGAIN;
		1229
		1230	if (SvTRUE (ERRSV))
		1231	{
		1232	FREETMPS; LEAVE;
		1233	ERR_ERRSV;
		1234	}
		1235
		1236	SvREFCNT_dec_NN (sv);
		1237	sv = SvREFCNT_inc (POPs);
		1238
		1239	PUTBACK;
		1240
		1241	FREETMPS; LEAVE;
		1242	}
		1243	break;
		1244
		1245	default:
		1246	filter:
		1247	{
		1248	SV *tag_sv = newSVuv (tag);
		1249
		1250	sv = decode_sv (dec);
		1251
		1252	dSP;
		1253	ENTER; SAVETMPS;
		1254	PUSHMARK (SP);
		1255	EXTEND (SP, 2);
		1256	PUSHs (tag_sv);
		1257	PUSHs (sv);
		1258
		1259	PUTBACK;
		1260	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1261	SPAGAIN;
		1262
		1263	if (SvTRUE (ERRSV))
		1264	{
		1265	SvREFCNT_dec_NN (tag_sv);
		1266	FREETMPS; LEAVE;
		1267	ERR_ERRSV;
		1268	}
		1269
		1270	if (count)
		1271	{
		1272	SvREFCNT_dec_NN (tag_sv);
		1273	SvREFCNT_dec_NN (sv);
		1274	sv = SvREFCNT_inc_NN (TOPs);
		1275	SP -= count;
		1276	}
		1277	else
		1278	{
		1279	AV *av = newAV ();
		1280	av_push (av, tag_sv);
		1281	av_push (av, sv);
		1282
		1283	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1284	? cbor_tagged_stash
		1285	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1286	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1287	}
		1288
		1289	PUTBACK;
		1290
		1291	FREETMPS; LEAVE;
		1292	}
		1293	break;
		1294	}
		1295
788	return sv;	1296	return sv;
789		1297
790	AV *av = newAV ();	1298	fail:
791	av_push (av, newSVuv (tag));	1299	SvREFCNT_dec (sv);
792	av_push (av, sv);	1300	return &PL_sv_undef;
793	return newRV_noinc ((SV *)av);
794	}	1301	}
795		1302
796	static SV *	1303	static SV *
797	decode_sv (dec_t *dec)	1304	decode_sv (dec_t *dec)
798	{	1305	{
799	WANT (1);	1306	WANT (1);
800		1307
801	switch (*dec->cur >> 5)	1308	switch (*dec->cur >> MAJOR_SHIFT)
802	{	1309	{
803	case 0: // unsigned int	1310	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
804	//TODO: 64 bit values on 3 2bit perls	1311	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
805	return newSVuv (decode_uint (dec));	1312	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
806	case 1: // negative int	1313	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
807	return newSViv (-1 - (IV)decode_uint (dec));	1314	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
808	case 2: // octet string	1315	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
809	return decode_str (dec, 0);	1316	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
810	case 3: // utf-8 string	1317
811	return decode_str (dec, 1);	1318	case MAJOR_MISC >> MAJOR_SHIFT:
812	case 4: // array
813	return decode_av (dec);
814	case 5: // map
815	return decode_hv (dec);
816	case 6: // tag
817	return decode_tagged (dec);
818	case 7: // misc
819	switch (*dec->cur++ & 31)	1319	switch (*dec->cur++ & MINOR_MASK)
820	{	1320	{
821	case 20:	1321	case SIMPLE_FALSE:
822	#if CBOR_SLOW	1322	#if CBOR_SLOW
823	cbor_false = get_bool ("CBOR::XS::false");	1323	types_false = get_bool ("Types::Serialiser::false");
824	#endif	1324	#endif
825	return newSVsv (cbor_false);	1325	return newSVsv (types_false);
826	case 21:	1326	case SIMPLE_TRUE:
827	#if CBOR_SLOW	1327	#if CBOR_SLOW
828	cbor_true = get_bool ("CBOR::XS::true");	1328	types_true = get_bool ("Types::Serialiser::true");
829	#endif	1329	#endif
830	return newSVsv (cbor_true);	1330	return newSVsv (types_true);
831	case 22:	1331	case SIMPLE_NULL:
832	return newSVsv (&PL_sv_undef);	1332	return newSVsv (&PL_sv_undef);
		1333	case SIMPLE_UNDEF:
		1334	#if CBOR_SLOW
		1335	types_error = get_bool ("Types::Serialiser::error");
		1336	#endif
		1337	return newSVsv (types_error);
833		1338
834	case 25:	1339	case MISC_FLOAT16:
835	{	1340	{
836	WANT (2);	1341	WANT (2);
837		1342
838	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1343	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
839	dec->cur += 2;	1344	dec->cur += 2;
840		1345
841	return newSVnv (ecb_binary16_to_float (fp));	1346	return newSVnv (ecb_binary16_to_float (fp));
842	}	1347	}
843		1348
844	case 26:	1349	case MISC_FLOAT32:
845	{	1350	{
846	uint32_t fp;	1351	uint32_t fp;
847	WANT (4);	1352	WANT (4);
848	memcpy (&fp, dec->cur, 4);	1353	memcpy (&fp, dec->cur, 4);
849	dec->cur += 4;	1354	dec->cur += 4;
…		…
852	fp = ecb_bswap32 (fp);	1357	fp = ecb_bswap32 (fp);
853		1358
854	return newSVnv (ecb_binary32_to_float (fp));	1359	return newSVnv (ecb_binary32_to_float (fp));
855	}	1360	}
856		1361
857	case 27:	1362	case MISC_FLOAT64:
858	{	1363	{
859	uint64_t fp;	1364	uint64_t fp;
860	WANT (8);	1365	WANT (8);
861	memcpy (&fp, dec->cur, 8);	1366	memcpy (&fp, dec->cur, 8);
862	dec->cur += 8;	1367	dec->cur += 8;
…		…
865	fp = ecb_bswap64 (fp);	1370	fp = ecb_bswap64 (fp);
866		1371
867	return newSVnv (ecb_binary64_to_double (fp));	1372	return newSVnv (ecb_binary64_to_double (fp));
868	}	1373	}
869		1374
870	// 0..19 unassigned	1375	// 0..19 unassigned simple
871	// 24 reserved + unassigned (reserved values are not encodable)	1376	// 24 reserved + unassigned simple (reserved values are not encodable)
		1377	// 28-30 unassigned misc
		1378	// 31 break code
872	default:	1379	default:
873	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1380	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
874	}	1381	}
875		1382
876	break;	1383	break;
877	}	1384	}
878	#if 0
879	switch (*dec->cur)
880	{
881	//case '"': ++dec->cur; return decode_str (dec);
882	case '[': ++dec->cur; return decode_av (dec);
883	case '{': ++dec->cur; return decode_hv (dec);
884
885	case '-':
886	case '0': case '1': case '2': case '3': case '4':
887	case '5': case '6': case '7': case '8': case '9':
888	//TODO return decode_num (dec);
889
890	case 't':
891	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
892	{
893	dec->cur += 4;
894	#if CBOR_SLOW
895	cbor_true = get_bool ("CBOR::XS::true");
896	#endif
897	return newSVsv (cbor_true);
898	}
899	else
900	ERR ("'true' expected");
901
902	break;
903
904	case 'f':
905	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
906	{
907	dec->cur += 5;
908	#if CBOR_SLOW
909	cbor_false = get_bool ("CBOR::XS::false");
910	#endif
911	return newSVsv (cbor_false);
912	}
913	else
914	ERR ("'false' expected");
915
916	break;
917
918	case 'n':
919	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
920	{
921	dec->cur += 4;
922	return newSVsv (&PL_sv_undef);
923	}
924	else
925	ERR ("'null' expected");
926
927	break;
928
929	default:
930	ERR ("malformed CBOR string, neither array, object, number, string or atom");
931	break;
932	}
933	#endif
934		1385
935	fail:	1386	fail:
936	return &PL_sv_undef;	1387	return &PL_sv_undef;
937	}	1388	}
938		1389
939	static SV *	1390	static SV *
940	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1391	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
941	{	1392	{
942	dec_t dec;	1393	dec_t dec = { 0 };
943	SV *sv;	1394	SV *sv;
		1395	STRLEN len;
		1396	char *data = SvPVbyte (string, len);
944		1397
945	/* work around bugs in 5.10 where manipulating magic values
946	* makes perl ignore the magic in subsequent accesses.
947	* also make a copy of non-PV values, to get them into a clean
948	* state (SvPV should do that, but it's buggy, see below).
949	*/
950	/*SvGETMAGIC (string);*/
951	if (SvMAGICAL (string) || !SvPOK (string))
952	string = sv_2mortal (newSVsv (string));
953
954	SvUPGRADE (string, SVt_PV);
955
956	/* work around a bug in perl 5.10, which causes SvCUR to fail an
957	* assertion with -DDEBUGGING, although SvCUR is documented to
958	* return the xpv_cur field which certainly exists after upgrading.
959	* according to nicholas clark, calling SvPOK fixes this.
960	* But it doesn't fix it, so try another workaround, call SvPV_nolen
961	* and hope for the best.
962	* Damnit, SvPV_nolen still trips over yet another assertion. This
963	* assertion business is seriously broken, try yet another workaround
964	* for the broken -DDEBUGGING.
965	*/
966	{
967	#ifdef DEBUGGING
968	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
969	#else
970	STRLEN offset = SvCUR (string);
971	#endif
972
973	if (offset > cbor->max_size && cbor->max_size)	1398	if (len > cbor->max_size && cbor->max_size)
974	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1399	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
975	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1400	(unsigned long)len, (unsigned long)cbor->max_size);
976	}
977
978	sv_utf8_downgrade (string, 0);
979		1401
980	dec.cbor = *cbor;	1402	dec.cbor = *cbor;
981	dec.cur = (U8 *)SvPVX (string);	1403	dec.cur = (U8 *)data;
982	dec.end = (U8 *)SvEND (string);	1404	dec.end = (U8 *)data + len;
983	dec.err = 0;
984	dec.depth = 0;
985
986	if (dec.cbor.cb_object || dec.cbor.cb_sk_object)
987	;//TODO dec.cbor.flags |= F_HOOK;
988		1405
989	sv = decode_sv (&dec);	1406	sv = decode_sv (&dec);
990		1407
991	if (offset_return)	1408	if (offset_return)
992	*offset_return = dec.cur;	1409	*offset_return = dec.cur;
…		…
995	if (dec.cur != dec.end && !dec.err)	1412	if (dec.cur != dec.end && !dec.err)
996	dec.err = "garbage after CBOR object";	1413	dec.err = "garbage after CBOR object";
997		1414
998	if (dec.err)	1415	if (dec.err)
999	{	1416	{
		1417	if (dec.shareable)
		1418	{
		1419	// need to break cyclic links, which would all be in shareable
		1420	int i;
		1421	SV **svp;
		1422
		1423	for (i = av_len (dec.shareable) + 1; i--; )
		1424	if ((svp = av_fetch (dec.shareable, i, 0)))
		1425	sv_setsv (*svp, &PL_sv_undef);
		1426	}
		1427
1000	SvREFCNT_dec (sv);	1428	SvREFCNT_dec_NN (sv);
		1429
		1430	if (dec.err_sv)
		1431	sv_2mortal (dec.err_sv);
		1432
1001	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1433	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
1002	}	1434	}
1003		1435
1004	sv = sv_2mortal (sv);	1436	sv = sv_2mortal (sv);
1005		1437
1006	return sv;	1438	return sv;
1007	}	1439	}
1008		1440
		1441	/////////////////////////////////////////////////////////////////////////////
		1442	// incremental parser
		1443
		1444	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1445
		1446	// returns 0 for notyet, 1 for success or error
		1447	static int
		1448	incr_parse (CBOR *self, SV *cborstr)
		1449	{
		1450	STRLEN cur;
		1451	SvPV (cborstr, cur);
		1452
		1453	while (ecb_expect_true (self->incr_need <= cur))
		1454	{
		1455	// table of integer count bytes
		1456	static I8 incr_len[MINOR_MASK + 1] = {
		1457	0, 0, 0, 0, 0, 0, 0, 0,
		1458	0, 0, 0, 0, 0, 0, 0, 0,
		1459	0, 0, 0, 0, 0, 0, 0, 0,
		1460	1, 2, 4, 8,-1,-1,-1,-2
		1461	};
		1462
		1463	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1464	U8 m = *p & MINOR_MASK;
		1465	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1466	I8 ilen = incr_len[m];
		1467
		1468	self->incr_need = self->incr_pos + 1;
		1469
		1470	if (ecb_expect_false (ilen < 0))
		1471	{
		1472	if (m != MINOR_INDEF)
		1473	return 1; // error
		1474
		1475	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1476	{
		1477	if (count >= 0)
		1478	return 1; // error
		1479
		1480	count = 1;
		1481	}
		1482	else
		1483	{
		1484	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1485	count = -1;
		1486	}
		1487	}
		1488	else
		1489	{
		1490	self->incr_need += ilen;
		1491	if (ecb_expect_false (self->incr_need > cur))
		1492	return 0;
		1493
		1494	int major = *p >> MAJOR_SHIFT;
		1495
		1496	switch (major)
		1497	{
		1498	case MAJOR_TAG >> MAJOR_SHIFT:
		1499	++count; // tags merely prefix another value
		1500	break;
		1501
		1502	case MAJOR_BYTES >> MAJOR_SHIFT:
		1503	case MAJOR_TEXT >> MAJOR_SHIFT:
		1504	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1505	case MAJOR_MAP >> MAJOR_SHIFT:
		1506	{
		1507	UV len;
		1508
		1509	if (ecb_expect_false (ilen))
		1510	{
		1511	len = 0;
		1512
		1513	do {
		1514	len = (len << 8) | *++p;
		1515	} while (--ilen);
		1516	}
		1517	else
		1518	len = m;
		1519
		1520	switch (major)
		1521	{
		1522	case MAJOR_BYTES >> MAJOR_SHIFT:
		1523	case MAJOR_TEXT >> MAJOR_SHIFT:
		1524	self->incr_need += len;
		1525	if (ecb_expect_false (self->incr_need > cur))
		1526	return 0;
		1527
		1528	break;
		1529
		1530	case MAJOR_MAP >> MAJOR_SHIFT:
		1531	len <<= 1;
		1532	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1533	if (len)
		1534	{
		1535	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1536	count = len + 1;
		1537	}
		1538	break;
		1539	}
		1540	}
		1541	}
		1542	}
		1543
		1544	self->incr_pos = self->incr_need;
		1545
		1546	if (count > 0)
		1547	{
		1548	while (!--count)
		1549	{
		1550	if (!AvFILLp (self->incr_count))
		1551	return 1; // done
		1552
		1553	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1554	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1555	}
		1556
		1557	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1558	}
		1559	}
		1560
		1561	return 0;
		1562	}
		1563
		1564
1009	/////////////////////////////////////////////////////////////////////////////	1565	/////////////////////////////////////////////////////////////////////////////
1010	// XS interface functions	1566	// XS interface functions
1011		1567
1012	MODULE = CBOR::XS PACKAGE = CBOR::XS	1568	MODULE = CBOR::XS PACKAGE = CBOR::XS
1013		1569
1014	BOOT:	1570	BOOT:
1015	{	1571	{
1016	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1572	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1017	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1573	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1018		1574
1019	cbor_true = get_bool ("CBOR::XS::true");	1575	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1020	cbor_false = get_bool ("CBOR::XS::false");	1576	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1577
		1578	types_true = get_bool ("Types::Serialiser::true" );
		1579	types_false = get_bool ("Types::Serialiser::false");
		1580	types_error = get_bool ("Types::Serialiser::error");
		1581
		1582	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1583
		1584	sv_cbor = newSVpv ("CBOR", 0);
		1585	SvREADONLY_on (sv_cbor);
		1586
		1587	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
1021	}	1588	}
1022		1589
1023	PROTOTYPES: DISABLE	1590	PROTOTYPES: DISABLE
1024		1591
1025	void CLONE (...)	1592	void CLONE (...)
1026	CODE:	1593	CODE:
1027	cbor_stash = 0;	1594	cbor_stash = 0;
		1595	cbor_tagged_stash = 0;
		1596	types_error_stash = 0;
1028	cbor_boolean_stash = 0;	1597	types_boolean_stash = 0;
1029		1598
1030	void new (char *klass)	1599	void new (char *klass)
1031	PPCODE:	1600	PPCODE:
1032	{	1601	{
1033	SV *pv = NEWSV (0, sizeof (CBOR));	1602	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1041		1610
1042	void shrink (CBOR *self, int enable = 1)	1611	void shrink (CBOR *self, int enable = 1)
1043	ALIAS:	1612	ALIAS:
1044	shrink = F_SHRINK	1613	shrink = F_SHRINK
1045	allow_unknown = F_ALLOW_UNKNOWN	1614	allow_unknown = F_ALLOW_UNKNOWN
		1615	allow_sharing = F_ALLOW_SHARING
		1616	allow_cycles = F_ALLOW_CYCLES
		1617	forbid_objects = F_FORBID_OBJECTS
		1618	pack_strings = F_PACK_STRINGS
		1619	text_keys = F_TEXT_KEYS
		1620	text_strings = F_TEXT_STRINGS
		1621	validate_utf8 = F_VALIDATE_UTF8
1046	PPCODE:	1622	PPCODE:
1047	{	1623	{
1048	if (enable)	1624	if (enable)
1049	self->flags |= ix;	1625	self->flags |= ix;
1050	else	1626	else
…		…
1055		1631
1056	void get_shrink (CBOR *self)	1632	void get_shrink (CBOR *self)
1057	ALIAS:	1633	ALIAS:
1058	get_shrink = F_SHRINK	1634	get_shrink = F_SHRINK
1059	get_allow_unknown = F_ALLOW_UNKNOWN	1635	get_allow_unknown = F_ALLOW_UNKNOWN
		1636	get_allow_sharing = F_ALLOW_SHARING
		1637	get_allow_cycles = F_ALLOW_CYCLES
		1638	get_forbid_objects = F_FORBID_OBJECTS
		1639	get_pack_strings = F_PACK_STRINGS
		1640	get_text_keys = F_TEXT_KEYS
		1641	get_text_strings = F_TEXT_STRINGS
		1642	get_validate_utf8 = F_VALIDATE_UTF8
1060	PPCODE:	1643	PPCODE:
1061	XPUSHs (boolSV (self->flags & ix));	1644	XPUSHs (boolSV (self->flags & ix));
1062		1645
1063	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1646	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1064	PPCODE:	1647	PPCODE:
…		…
1080	CODE:	1663	CODE:
1081	RETVAL = self->max_size;	1664	RETVAL = self->max_size;
1082	OUTPUT:	1665	OUTPUT:
1083	RETVAL	1666	RETVAL
1084		1667
1085	#if 0 //TODO	1668	void filter (CBOR *self, SV *filter = 0)
1086
1087	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1088	PPCODE:	1669	PPCODE:
1089	{
1090	SvREFCNT_dec (self->cb_object);	1670	SvREFCNT_dec (self->filter);
1091	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1671	self->filter = filter ? newSVsv (filter) : filter;
1092
1093	XPUSHs (ST (0));	1672	XPUSHs (ST (0));
1094	}
1095		1673
1096	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1674	SV *get_filter (CBOR *self)
1097	PPCODE:	1675	CODE:
1098	{	1676	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1099	if (!self->cb_sk_object)	1677	OUTPUT:
1100	self->cb_sk_object = newHV ();	1678	RETVAL
1101
1102	if (SvOK (cb))
1103	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1104	else
1105	{
1106	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1107
1108	if (!HvKEYS (self->cb_sk_object))
1109	{
1110	SvREFCNT_dec (self->cb_sk_object);
1111	self->cb_sk_object = 0;
1112	}
1113	}
1114
1115	XPUSHs (ST (0));
1116	}
1117
1118	#endif
1119		1679
1120	void encode (CBOR *self, SV *scalar)	1680	void encode (CBOR *self, SV *scalar)
1121	PPCODE:	1681	PPCODE:
1122	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1682	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1123	XPUSHs (scalar);	1683	XPUSHs (scalar);
…		…
1136	EXTEND (SP, 2);	1696	EXTEND (SP, 2);
1137	PUSHs (sv);	1697	PUSHs (sv);
1138	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1698	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1139	}	1699	}
1140		1700
		1701	void incr_parse (CBOR *self, SV *cborstr)
		1702	ALIAS:
		1703	incr_parse_multiple = 1
		1704	PPCODE:
		1705	{
		1706	if (SvUTF8 (cborstr))
		1707	sv_utf8_downgrade (cborstr, 0);
		1708
		1709	if (!self->incr_count)
		1710	{
		1711	self->incr_count = newAV ();
		1712	self->incr_pos = 0;
		1713	self->incr_need = 1;
		1714
		1715	av_push (self->incr_count, newSViv (1));
		1716	}
		1717
		1718	do
		1719	{
		1720	if (!incr_parse (self, cborstr))
		1721	{
		1722	if (self->incr_need > self->max_size && self->max_size)
		1723	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1724	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1725
		1726	break;
		1727	}
		1728
		1729	SV *sv;
		1730	char *offset;
		1731
		1732	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1733	XPUSHs (sv);
		1734
		1735	sv_chop (cborstr, offset);
		1736
		1737	av_clear (self->incr_count);
		1738	av_push (self->incr_count, newSViv (1));
		1739
		1740	self->incr_pos = 0;
		1741	self->incr_need = self->incr_pos + 1;
		1742	}
		1743	while (ix);
		1744	}
		1745
		1746	void incr_reset (CBOR *self)
		1747	CODE:
		1748	{
		1749	SvREFCNT_dec (self->incr_count);
		1750	self->incr_count = 0;
		1751	}
		1752
1141	void DESTROY (CBOR *self)	1753	void DESTROY (CBOR *self)
1142	CODE:	1754	PPCODE:
1143	SvREFCNT_dec (self->cb_sk_object);	1755	cbor_free (self);
1144	SvREFCNT_dec (self->cb_object);
1145		1756
1146	PROTOTYPES: ENABLE	1757	PROTOTYPES: ENABLE
1147		1758
1148	void encode_cbor (SV *scalar)	1759	void encode_cbor (SV *scalar)
		1760	ALIAS:
		1761	encode_cbor = 0
		1762	encode_cbor_sharing = F_ALLOW_SHARING
1149	PPCODE:	1763	PPCODE:
1150	{	1764	{
1151	CBOR cbor;	1765	CBOR cbor;
1152	cbor_init (&cbor);	1766	cbor_init (&cbor);
		1767	cbor.flags |= ix;
1153	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1768	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1154	XPUSHs (scalar);	1769	XPUSHs (scalar);
1155	}	1770	}
1156		1771
1157	void decode_cbor (SV *cborstr)	1772	void decode_cbor (SV *cborstr)
…		…
1161	cbor_init (&cbor);	1776	cbor_init (&cbor);
1162	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1777	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1163	XPUSHs (cborstr);	1778	XPUSHs (cborstr);
1164	}	1779	}
1165		1780
		1781	#ifdef __AFL_COMPILER
		1782
		1783	void
		1784	afl_init ()
		1785	CODE:
		1786	__AFL_INIT ();
		1787
		1788	int
		1789	afl_loop (unsigned int count = 10000)
		1790	CODE:
		1791	RETVAL = __AFL_LOOP (count);
		1792	OUTPUT:
		1793	RETVAL
		1794
		1795	#endif
		1796

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