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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 1.67 by root, Sun Nov 29 21:35:06 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_BYTES = 1,
		109	AS_TEXT = 2,
		110	AS_INT = 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_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
185	static void encode_sv (enc_t *enc, SV *sv);	464	static void encode_sv (enc_t *enc, SV *sv);
186		465
187	static void	466	static void
188	encode_av (enc_t *enc, AV *av)	467	encode_av (enc_t *enc, AV *av)
189	{	468	{
…		…
192	if (enc->depth >= enc->cbor.max_depth)	471	if (enc->depth >= enc->cbor.max_depth)
193	croak (ERR_NESTING_EXCEEDED);	472	croak (ERR_NESTING_EXCEEDED);
194		473
195	++enc->depth;	474	++enc->depth;
196		475
197	encode_uint (enc, 0x80, len + 1);	476	encode_uint (enc, MAJOR_ARRAY, len + 1);
198		477
		478	if (ecb_expect_false (SvMAGICAL (av)))
199	for (i = 0; i <= len; ++i)	479	for (i = 0; i <= len; ++i)
200	{	480	{
201	SV **svp = av_fetch (av, i, 0);	481	SV **svp = av_fetch (av, i, 0);
202	encode_sv (enc, svp ? *svp : &PL_sv_undef);	482	encode_sv (enc, svp ? *svp : &PL_sv_undef);
203	}	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	}
204		490
205	--enc->depth;	491	--enc->depth;
206	}	492	}
207		493
208	static void	494	static void
…		…
216	++enc->depth;	502	++enc->depth;
217		503
218	int pairs = hv_iterinit (hv);	504	int pairs = hv_iterinit (hv);
219	int mg = SvMAGICAL (hv);	505	int mg = SvMAGICAL (hv);
220		506
221	if (mg)	507	if (ecb_expect_false (mg))
222	encode_ch (enc, 0xa0 | 31);	508	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
223	else	509	else
224	encode_uint (enc, 0xa0, pairs);	510	encode_uint (enc, MAJOR_MAP, pairs);
225		511
226	while ((he = hv_iternext (hv)))	512	while ((he = hv_iternext (hv)))
227	{	513	{
228	if (HeKLEN (he) == HEf_SVKEY)	514	if (HeKLEN (he) == HEf_SVKEY)
229	encode_sv (enc, HeSVKEY (he));	515	encode_sv (enc, HeSVKEY (he));
230	else	516	else
231	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));
232		518
233	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));
234	}	520	}
235		521
236	if (mg)	522	if (ecb_expect_false (mg))
237	encode_ch (enc, 0xe0 | 31);	523	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
238		524
239	--enc->depth;	525	--enc->depth;
240	}	526	}
241		527
242	// encode objects, arrays and special \0=false and \1=true values.	528	// encode objects, arrays and special \0=false and \1=true values.
243	static void	529	static void
244	encode_rv (enc_t *enc, SV *sv)	530	encode_rv (enc_t *enc, SV *sv)
245	{	531	{
246	svtype svt;
247
248	SvGETMAGIC (sv);	532	SvGETMAGIC (sv);
		533
249	svt = SvTYPE (sv);	534	svtype svt = SvTYPE (sv);
250		535
251	if (expect_false (SvOBJECT (sv)))	536	if (ecb_expect_false (SvOBJECT (sv)))
252	{	537	{
253	HV *stash = !CBOR_SLOW || cbor_boolean_stash	538	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
254	? 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
255	: gv_stashpv ("CBOR::XS::Boolean", 1);	546	: gv_stashpv ("CBOR::XS::Tagged" , 1);
256		547
257	if (SvSTASH (sv) == stash)	548	HV *stash = SvSTASH (sv);
258	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	}
259	else	600	else
260	{	601	{
261	#if 0 //TODO	602	sv_setuv (*svp, enc->shareable_idx);
262	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)))
263	{	617	{
		618	dSP;
		619
		620	ENTER; SAVETMPS;
		621	PUSHMARK (SP);
264	// 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
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)));	623	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
273		624
274	// calling with G_SCALAR ensures that we always get a 1 return value
275	PUTBACK;	625	PUTBACK;
		626	// G_SCALAR ensures that return value is 1
276	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	627	call_sv ((SV *)GvCV (method), G_SCALAR);
277	SPAGAIN;	628	SPAGAIN;
278		629
279	// catch this surprisingly common error	630	// catch this surprisingly common error
280	if (SvROK (TOPs) && SvRV (TOPs) == sv)	631	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)));	632	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
282		633
283	sv = POPs;
284	PUTBACK;
285
286	encode_sv (enc, sv);	634	encode_sv (enc, POPs);
287		635
		636	PUTBACK;
		637
288	FREETMPS; LEAVE;	638	FREETMPS; LEAVE;
289	}	639	}
290	else if (enc->cbor.flags & F_ALLOW_BLESSED)	640	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
291	encode_str (enc, "null", 4, 0);	641	{
292	else	642	dSP;
293	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it",	643
294	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;
295	}	670	}
296	else if (enc->cbor.flags & F_ALLOW_BLESSED)	671
297	encode_str (enc, "null", 4, 0);	672	PUTBACK;
		673
		674	FREETMPS; LEAVE;
		675	}
298	else	676	else
299	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",
300	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	678	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
301	#endif
302	}
303	}	679	}
304	else if (svt == SVt_PVHV)	680	else if (svt == SVt_PVHV)
305	encode_hv (enc, (HV *)sv);	681	encode_hv (enc, (HV *)sv);
306	else if (svt == SVt_PVAV)	682	else if (svt == SVt_PVAV)
307	encode_av (enc, (AV *)sv);	683	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	684	else
326	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	685	{
327	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	686	encode_tag (enc, CBOR_TAG_INDIRECTION);
		687	encode_sv (enc, sv);
		688	}
328	}	689	}
329		690
330	static void	691	static void
331	encode_nv (enc_t *enc, SV *sv)	692	encode_nv (enc_t *enc, SV *sv)
332	{	693	{
333	double nv = SvNVX (sv);	694	double nv = SvNVX (sv);
334		695
335	need (enc, 9);	696	need (enc, 9);
336		697
337	if (expect_false (nv == (U32)nv))	698	if (ecb_expect_false (nv == (NV)(U32)nv))
338	encode_uint (enc, 0x00, (U32)nv);	699	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
339	//TODO: maybe I32?	700	//TODO: maybe I32?
340	else if (expect_false (nv == (float)nv))	701	else if (ecb_expect_false (nv == (float)nv))
341	{	702	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	703	else
353	{	704	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	}	705	}
365		706
366	static void	707	static void
367	encode_sv (enc_t *enc, SV *sv)	708	encode_sv (enc_t *enc, SV *sv)
368	{	709	{
…		…
370		711
371	if (SvPOKp (sv))	712	if (SvPOKp (sv))
372	{	713	{
373	STRLEN len;	714	STRLEN len;
374	char *str = SvPV (sv, len);	715	char *str = SvPV (sv, len);
375	encode_str (enc, SvUTF8 (sv), str, len);	716	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
376	}	717	}
377	else if (SvNOKp (sv))	718	else if (SvNOKp (sv))
378	encode_nv (enc, sv);	719	encode_nv (enc, sv);
379	else if (SvIOKp (sv))	720	else if (SvIOKp (sv))
380	{	721	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))	722	else if (SvROK (sv))
389	encode_rv (enc, SvRV (sv));	723	encode_rv (enc, SvRV (sv));
390	else if (!SvOK (sv))	724	else if (!SvOK (sv))
391	encode_ch (enc, 0xe0 | 22);	725	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
392	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	726	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
393	encode_ch (enc, 0xe0 | 23);	727	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
394	else	728	else
395	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",
396	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	730	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
397	}	731	}
398		732
399	static SV *	733	static SV *
400	encode_cbor (SV *scalar, CBOR *cbor)	734	encode_cbor (SV *scalar, CBOR *cbor)
401	{	735	{
402	enc_t enc;	736	enc_t enc = { 0 };
403		737
404	enc.cbor = *cbor;	738	enc.cbor = *cbor;
405	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	739	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
406	enc.cur = SvPVX (enc.sv);	740	enc.cur = SvPVX (enc.sv);
407	enc.end = SvEND (enc.sv);	741	enc.end = SvEND (enc.sv);
408	enc.depth = 0;
409		742
410	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
411	encode_sv (&enc, scalar);	752	encode_sv (&enc, scalar);
412		753
413	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	754	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
414	*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
415		756
…		…
429	U8 *end; // end of input string	770	U8 *end; // end of input string
430	const char *err; // parse error, if != 0	771	const char *err; // parse error, if != 0
431	CBOR cbor;	772	CBOR cbor;
432	U32 depth; // recursion depth	773	U32 depth; // recursion depth
433	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
434	} dec_t;	779	} dec_t;
435		780
436	#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);
437		788
438	#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;
439		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
440	#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)
441	#define DEC_DEC_DEPTH --dec->depth	818	#define DEC_DEC_DEPTH --dec->depth
442		819
443	static UV	820	static UV
444	decode_uint (dec_t *dec)	821	decode_uint (dec_t *dec)
445	{	822	{
446	switch (*dec->cur & 31)	823	U8 m = *dec->cur & MINOR_MASK;
447	{	824	++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		825
453	case 24:	826	if (ecb_expect_true (m < LENGTH_EXT1))
		827	return m;
		828	else if (ecb_expect_true (m == LENGTH_EXT1))
		829	{
454	WANT (2);	830	WANT (1);
455	dec->cur += 2;	831	dec->cur += 1;
456	return dec->cur[-1];	832	return dec->cur[-1];
457		833	}
458	case 25:	834	else if (ecb_expect_true (m == LENGTH_EXT2))
		835	{
459	WANT (3);	836	WANT (2);
460	dec->cur += 3;	837	dec->cur += 2;
461	return (((UV)dec->cur[-2]) << 8)	838	return (((UV)dec->cur[-2]) << 8)
462	| ((UV)dec->cur[-1]);	839	| ((UV)dec->cur[-1]);
463		840	}
464	case 26:	841	else if (ecb_expect_true (m == LENGTH_EXT4))
		842	{
465	WANT (5);	843	WANT (4);
466	dec->cur += 5;	844	dec->cur += 4;
467	return (((UV)dec->cur[-4]) << 24)	845	return (((UV)dec->cur[-4]) << 24)
468	| (((UV)dec->cur[-3]) << 16)	846	| (((UV)dec->cur[-3]) << 16)
469	| (((UV)dec->cur[-2]) << 8)	847	| (((UV)dec->cur[-2]) << 8)
470	| ((UV)dec->cur[-1]);	848	| ((UV)dec->cur[-1]);
471		849	}
472	case 27:	850	else if (ecb_expect_true (m == LENGTH_EXT8))
		851	{
473	WANT (9);	852	WANT (8);
474	dec->cur += 9;	853	dec->cur += 8;
		854
		855	return
		856	#if UVSIZE < 8
		857	0
		858	#else
475	return (((UV)dec->cur[-8]) << 56)	859	(((UV)dec->cur[-8]) << 56)
476	| (((UV)dec->cur[-7]) << 48)	860	| (((UV)dec->cur[-7]) << 48)
477	| (((UV)dec->cur[-6]) << 40)	861	| (((UV)dec->cur[-6]) << 40)
478	| (((UV)dec->cur[-5]) << 32)	862	| (((UV)dec->cur[-5]) << 32)
		863	#endif
479	| (((UV)dec->cur[-4]) << 24)	864	| (((UV)dec->cur[-4]) << 24)
480	| (((UV)dec->cur[-3]) << 16)	865	| (((UV)dec->cur[-3]) << 16)
481	| (((UV)dec->cur[-2]) << 8)	866	| (((UV)dec->cur[-2]) << 8)
482	| ((UV)dec->cur[-1]);	867	| ((UV)dec->cur[-1]);
483		868	}
484	default:	869	else
485	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	870	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
486	}
487		871
488	fail:	872	fail:
489	return 0;	873	return 0;
490	}	874	}
491		875
…		…
496	{	880	{
497	AV *av = newAV ();	881	AV *av = newAV ();
498		882
499	DEC_INC_DEPTH;	883	DEC_INC_DEPTH;
500		884
501	if ((*dec->cur & 31) == 31)	885	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
502	{	886	{
503	++dec->cur;	887	++dec->cur;
504		888
505	for (;;)	889	for (;;)
506	{	890	{
507	WANT (1);	891	WANT (1);
508		892
509	if (*dec->cur == 0xe0 | 31)	893	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
510	{	894	{
511	++dec->cur;	895	++dec->cur;
512	break;	896	break;
513	}	897	}
514		898
515	av_push (av, decode_sv (dec));	899	av_push (av, decode_sv (dec));
516	}	900	}
517	}	901	}
518	else	902	else
519	{	903	{
520	int i, len = decode_uint (dec);	904	UV i, len = decode_uint (dec);
521		905
		906	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);	907	av_fill (av, len - 1);
523		908
524	for (i = 0; i < len; ++i)	909	for (i = 0; i < len; ++i)
525	AvARRAY (av)[i] = decode_sv (dec);	910	AvARRAY (av)[i] = decode_sv (dec);
526	}	911	}
527		912
528	DEC_DEC_DEPTH;	913	DEC_DEC_DEPTH;
529	return newRV_noinc ((SV *)av);	914	return newRV_noinc ((SV *)av);
530		915
531	fail:	916	fail:
532	SvREFCNT_dec (av);	917	SvREFCNT_dec_NN (av);
533	DEC_DEC_DEPTH;	918	DEC_DEC_DEPTH;
534	return &PL_sv_undef;	919	return &PL_sv_undef;
535	}	920	}
536		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
537	static SV *	996	static SV *
538	decode_hv (dec_t *dec)	997	decode_hv (dec_t *dec)
539	{	998	{
540	HV *hv = newHV ();	999	HV *hv = newHV ();
541		1000
542	DEC_INC_DEPTH;	1001	DEC_INC_DEPTH;
543		1002
544	if ((*dec->cur & 31) == 31)	1003	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
545	{	1004	{
546	++dec->cur;	1005	++dec->cur;
547		1006
548	for (;;)	1007	for (;;)
549	{	1008	{
550	WANT (1);	1009	WANT (1);
551		1010
552	if (*dec->cur == 0xe0 | 31)	1011	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
553	{	1012	{
554	++dec->cur;	1013	++dec->cur;
555	break;	1014	break;
556	}	1015	}
557		1016
558	SV *k = decode_sv (dec);	1017	decode_he (dec, hv);
559	SV *v = decode_sv (dec);
560
561	hv_store_ent (hv, k, v, 0);
562	}	1018	}
563	}	1019	}
564	else	1020	else
565	{	1021	{
566	int len = decode_uint (dec);	1022	UV pairs = decode_uint (dec);
567		1023
		1024	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1025
568	while (len--)	1026	while (pairs--)
569	{	1027	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	}	1028	}
576		1029
577	DEC_DEC_DEPTH;	1030	DEC_DEC_DEPTH;
578	return newRV_noinc ((SV *)hv);	1031	return newRV_noinc ((SV *)hv);
579		1032
580	#if 0	1033	fail:
581	SV *sv;	1034	SvREFCNT_dec_NN (hv);
582	HV *hv = newHV ();
583
584	DEC_INC_DEPTH;	1035	DEC_DEC_DEPTH;
585	decode_ws (dec);	1036	return &PL_sv_undef;
		1037	}
586		1038
587	for (;;)	1039	static SV *
588	{	1040	decode_str (dec_t *dec, int utf8)
589	// heuristic: assume that	1041	{
590	// a) decode_str + hv_store_ent are abysmally slow.	1042	SV *sv = 0;
591	// b) most hash keys are short, simple ascii text.	1043
592	// => try to "fast-match" such strings to avoid	1044	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
593	// the overhead of decode_str + hv_store_ent.
594	{	1045	{
595	SV *value;	1046	// indefinite length strings
596	char *p = dec->cur;	1047	++dec->cur;
597	char *e = p + 24; // only try up to 24 bytes
598		1048
		1049	U8 major = *dec->cur & MAJOR_MISC;
		1050
		1051	sv = newSVpvn ("", 0);
		1052
599	for (;;)	1053	for (;;)
600	{	1054	{
601	// the >= 0x80 is false on most architectures	1055	WANT (1);
602	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')	1056
		1057	if ((*dec->cur - major) > LENGTH_EXT8)
		1058	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
603	{	1059	{
604	// slow path, back up and use decode_str	1060	++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;	1061	break;
623	}	1062	}
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	{	1063	else
689	dSP;	1064	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
690	int count;
691		1065
692	ENTER; SAVETMPS; PUSHMARK (SP);	1066	STRLEN len = decode_uint (dec);
693	XPUSHs (HeVAL (he));
694	sv_2mortal (sv);
695		1067
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);	1068	WANT (len);
756		1069	sv_catpvn (sv, dec->cur, len);
757	if (*dec->cur == 0xe0 | 31)	1070	dec->cur += len;
758	{
759	++dec->cur;
760	break;
761	}
762
763	SV *sv2 = decode_sv (dec);
764	sv_catsv (sv, sv2);
765	}	1071	}
766	}	1072	}
767	else	1073	else
768	{	1074	{
769	STRLEN len = decode_uint (dec);	1075	STRLEN len = decode_uint (dec);
770		1076
771	WANT (len);	1077	WANT (len);
772	sv = newSVpvn (dec->cur, len);	1078	sv = newSVpvn (dec->cur, len);
773	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));
774	}	1084	}
775		1085
776	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
777	SvUTF8_on (sv);	1092	SvUTF8_on (sv);
		1093	}
778		1094
779	return sv;	1095	return sv;
780		1096
781	fail:	1097	fail:
		1098	SvREFCNT_dec (sv);
		1099	return &PL_sv_undef;
		1100	}
		1101
		1102	static SV *
		1103	decode_tagged (dec_t *dec)
		1104	{
		1105	SV *sv = 0;
		1106	UV tag = decode_uint (dec);
		1107
		1108	WANT (1);
		1109
		1110	switch (tag)
		1111	{
		1112	case CBOR_TAG_MAGIC:
		1113	sv = decode_sv (dec);
		1114	break;
		1115
		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
		1296	return sv;
		1297
		1298	fail:
		1299	SvREFCNT_dec (sv);
782	return &PL_sv_undef;	1300	return &PL_sv_undef;
783	}	1301	}
784		1302
785	static SV *	1303	static SV *
786	decode_sv (dec_t *dec)	1304	decode_sv (dec_t *dec)
787	{	1305	{
788	WANT (1);	1306	WANT (1);
789		1307
790	switch (*dec->cur >> 5)	1308	switch (*dec->cur >> MAJOR_SHIFT)
791	{	1309	{
792	case 0: // unsigned int	1310	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
793	//TODO: 64 bit values on 3 2bit perls	1311	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
794	return newSVuv (decode_uint (dec));	1312	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
795	case 1: // negative int	1313	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
796	return newSViv (-1 - (IV)decode_uint (dec));	1314	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
797	case 2: // octet string	1315	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
798	return decode_str (dec, 0);	1316	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
799	case 3: // utf-8 string	1317
800	return decode_str (dec, 1);	1318	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)	1319	switch (*dec->cur++ & MINOR_MASK)
810	{	1320	{
811	case 20:	1321	case SIMPLE_FALSE:
812	#if CBOR_SLOW	1322	#if CBOR_SLOW
813	cbor_false = get_bool ("CBOR::XS::false");	1323	types_false = get_bool ("Types::Serialiser::false");
814	#endif	1324	#endif
815	return newSVsv (cbor_false);	1325	return newSVsv (types_false);
816	case 21:	1326	case SIMPLE_TRUE:
817	#if CBOR_SLOW	1327	#if CBOR_SLOW
818	cbor_true = get_bool ("CBOR::XS::true");	1328	types_true = get_bool ("Types::Serialiser::true");
819	#endif	1329	#endif
820	return newSVsv (cbor_true);	1330	return newSVsv (types_true);
821	case 22:	1331	case SIMPLE_NULL:
822	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);
823		1338
824	case 25:	1339	case MISC_FLOAT16:
825	// half float
826	abort ();
827	break;	1340	{
		1341	WANT (2);
828		1342
		1343	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
		1344	dec->cur += 2;
		1345
		1346	return newSVnv (ecb_binary16_to_float (fp));
		1347	}
		1348
829	case 26:	1349	case MISC_FLOAT32:
830	{	1350	{
831	uint32_t fp;	1351	uint32_t fp;
832	WANT (4);	1352	WANT (4);
833	memcpy (&fp, dec->cur, 4);	1353	memcpy (&fp, dec->cur, 4);
834	dec->cur += 4;	1354	dec->cur += 4;
…		…
837	fp = ecb_bswap32 (fp);	1357	fp = ecb_bswap32 (fp);
838		1358
839	return newSVnv (ecb_binary32_to_float (fp));	1359	return newSVnv (ecb_binary32_to_float (fp));
840	}	1360	}
841		1361
842	case 27:	1362	case MISC_FLOAT64:
843	{	1363	{
844	uint64_t fp;	1364	uint64_t fp;
845	WANT (8);	1365	WANT (8);
846	memcpy (&fp, dec->cur, 8);	1366	memcpy (&fp, dec->cur, 8);
847	dec->cur += 8;	1367	dec->cur += 8;
…		…
850	fp = ecb_bswap64 (fp);	1370	fp = ecb_bswap64 (fp);
851		1371
852	return newSVnv (ecb_binary64_to_double (fp));	1372	return newSVnv (ecb_binary64_to_double (fp));
853	}	1373	}
854		1374
855	// 0..19 unassigned	1375	// 0..19 unassigned simple
856	// 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
857	default:	1379	default:
858	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1380	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
859	}	1381	}
860		1382
861	break;	1383	break;
862	}	1384	}
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		1385
920	fail:	1386	fail:
921	return &PL_sv_undef;	1387	return &PL_sv_undef;
922	}	1388	}
923		1389
924	static SV *	1390	static SV *
925	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1391	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
926	{	1392	{
927	dec_t dec;	1393	dec_t dec = { 0 };
928	SV *sv;	1394	SV *sv;
		1395	STRLEN len;
		1396	char *data = SvPVbyte (string, len);
929		1397
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)	1398	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",	1399	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);	1400	(unsigned long)len, (unsigned long)cbor->max_size);
961	}
962
963	sv_utf8_downgrade (string, 0);
964		1401
965	dec.cbor = *cbor;	1402	dec.cbor = *cbor;
966	dec.cur = (U8 *)SvPVX (string);	1403	dec.cur = (U8 *)data;
967	dec.end = (U8 *)SvEND (string);	1404	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		1405
974	sv = decode_sv (&dec);	1406	sv = decode_sv (&dec);
975		1407
976	if (offset_return)	1408	if (offset_return)
977	*offset_return = dec.cur;	1409	*offset_return = dec.cur;
978		1410
979	if (!(offset_return || !sv))	1411	if (!(offset_return || !sv))
980	{
981	if (*dec.cur && !dec.err)	1412	if (dec.cur != dec.end && !dec.err)
982	{
983	dec.err = "garbage after CBOR object";	1413	dec.err = "garbage after CBOR object";
984	SvREFCNT_dec (sv);	1414
985	sv = 0;	1415	if (dec.err)
		1416	{
		1417	if (dec.shareable)
986	}	1418	{
987	}	1419	// need to break cyclic links, which would all be in shareable
		1420	int i;
		1421	SV **svp;
988		1422
989	if (!sv)	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
		1428	SvREFCNT_dec_NN (sv);
		1429
		1430	if (dec.err_sv)
		1431	sv_2mortal (dec.err_sv);
		1432
990	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);
		1434	}
991		1435
992	sv = sv_2mortal (sv);	1436	sv = sv_2mortal (sv);
993		1437
994	return sv;	1438	return sv;
995	}	1439	}
996		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
997	/////////////////////////////////////////////////////////////////////////////	1565	/////////////////////////////////////////////////////////////////////////////
998	// XS interface functions	1566	// XS interface functions
999		1567
1000	MODULE = CBOR::XS PACKAGE = CBOR::XS	1568	MODULE = CBOR::XS PACKAGE = CBOR::XS
1001		1569
1002	BOOT:	1570	BOOT:
1003	{	1571	{
1004	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1572	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1005	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1573	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1006		1574
1007	cbor_true = get_bool ("CBOR::XS::true");	1575	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1008	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));
1009	}	1588	}
1010		1589
1011	PROTOTYPES: DISABLE	1590	PROTOTYPES: DISABLE
1012		1591
1013	void CLONE (...)	1592	void CLONE (...)
1014	CODE:	1593	CODE:
1015	cbor_stash = 0;	1594	cbor_stash = 0;
		1595	cbor_tagged_stash = 0;
		1596	types_error_stash = 0;
1016	cbor_boolean_stash = 0;	1597	types_boolean_stash = 0;
1017		1598
1018	void new (char *klass)	1599	void new (char *klass)
1019	PPCODE:	1600	PPCODE:
1020	{	1601	{
1021	SV *pv = NEWSV (0, sizeof (CBOR));	1602	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1029		1610
1030	void shrink (CBOR *self, int enable = 1)	1611	void shrink (CBOR *self, int enable = 1)
1031	ALIAS:	1612	ALIAS:
1032	shrink = F_SHRINK	1613	shrink = F_SHRINK
1033	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
1034	PPCODE:	1622	PPCODE:
1035	{	1623	{
1036	if (enable)	1624	if (enable)
1037	self->flags |= ix;	1625	self->flags |= ix;
1038	else	1626	else
…		…
1043		1631
1044	void get_shrink (CBOR *self)	1632	void get_shrink (CBOR *self)
1045	ALIAS:	1633	ALIAS:
1046	get_shrink = F_SHRINK	1634	get_shrink = F_SHRINK
1047	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
1048	PPCODE:	1643	PPCODE:
1049	XPUSHs (boolSV (self->flags & ix));	1644	XPUSHs (boolSV (self->flags & ix));
1050		1645
1051	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1646	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1052	PPCODE:	1647	PPCODE:
…		…
1068	CODE:	1663	CODE:
1069	RETVAL = self->max_size;	1664	RETVAL = self->max_size;
1070	OUTPUT:	1665	OUTPUT:
1071	RETVAL	1666	RETVAL
1072		1667
1073	#if 0 //TODO	1668	void filter (CBOR *self, SV *filter = 0)
1074
1075	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1076	PPCODE:	1669	PPCODE:
1077	{
1078	SvREFCNT_dec (self->cb_object);	1670	SvREFCNT_dec (self->filter);
1079	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1671	self->filter = filter ? newSVsv (filter) : filter;
1080
1081	XPUSHs (ST (0));	1672	XPUSHs (ST (0));
1082	}
1083		1673
1084	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1674	SV *get_filter (CBOR *self)
1085	PPCODE:	1675	CODE:
1086	{	1676	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1087	if (!self->cb_sk_object)	1677	OUTPUT:
1088	self->cb_sk_object = newHV ();	1678	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		1679
1108	void encode (CBOR *self, SV *scalar)	1680	void encode (CBOR *self, SV *scalar)
1109	PPCODE:	1681	PPCODE:
1110	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1682	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1111	XPUSHs (scalar);	1683	XPUSHs (scalar);
…		…
1124	EXTEND (SP, 2);	1696	EXTEND (SP, 2);
1125	PUSHs (sv);	1697	PUSHs (sv);
1126	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1698	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1127	}	1699	}
1128		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
1129	void DESTROY (CBOR *self)	1753	void DESTROY (CBOR *self)
1130	CODE:	1754	PPCODE:
1131	SvREFCNT_dec (self->cb_sk_object);	1755	cbor_free (self);
1132	SvREFCNT_dec (self->cb_object);
1133		1756
1134	PROTOTYPES: ENABLE	1757	PROTOTYPES: ENABLE
1135		1758
1136	void encode_cbor (SV *scalar)	1759	void encode_cbor (SV *scalar)
		1760	ALIAS:
		1761	encode_cbor = 0
		1762	encode_cbor_sharing = F_ALLOW_SHARING
1137	PPCODE:	1763	PPCODE:
1138	{	1764	{
1139	CBOR cbor;	1765	CBOR cbor;
1140	cbor_init (&cbor);	1766	cbor_init (&cbor);
		1767	cbor.flags |= ix;
1141	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1768	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1142	XPUSHs (scalar);	1769	XPUSHs (scalar);
1143	}	1770	}
1144		1771
1145	void decode_cbor (SV *cborstr)	1772	void decode_cbor (SV *cborstr)
…		…
1149	cbor_init (&cbor);	1776	cbor_init (&cbor);
1150	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1777	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1151	XPUSHs (cborstr);	1778	XPUSHs (cborstr);
1152	}	1779	}
1153		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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