ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/CBOR-XS/XS.xs

Comparing CBOR-XS/XS.xs (file contents):
Revision 1.3 by root, Sat Oct 26 11:08:34 2013 UTC vs.
Revision 1.66 by root, Sun Nov 29 21:32:01 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_BYTES = 1,
		109	AS_TEXT = 2,
		110	AS_FLOAT16 = 3,
		111	AS_FLOAT32 = 4,
		112	AS_FLOAT64 = 5,
		113	// possibly future enhancements: float, integer
		114	};
		115
14	#define F_SHRINK 0x00000200UL	116	#define F_SHRINK 0x00000001UL
15	#define F_ALLOW_UNKNOWN 0x00002000UL	117	#define F_ALLOW_UNKNOWN 0x00000002UL
		118	#define F_ALLOW_SHARING 0x00000004UL
		119	#define F_ALLOW_CYCLES 0x00000008UL
		120	#define F_FORBID_OBJECTS 0x00000010UL
		121	#define F_PACK_STRINGS 0x00000020UL
		122	#define F_TEXT_KEYS 0x00000040UL
		123	#define F_TEXT_STRINGS 0x00000080UL
		124	#define F_VALIDATE_UTF8 0x00000100UL
16		125
17	#define INIT_SIZE 32 // initial scalar size to be allocated	126	#define INIT_SIZE 32 // initial scalar size to be allocated
18		127
19	#define SB do {	128	#define SB do {
20	#define SE } while (0)	129	#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		130
33	#define IN_RANGE_INC(type,val,beg,end) \	131	#define IN_RANGE_INC(type,val,beg,end) \
34	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \	132	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
35	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))	133	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
36		134
…		…
42	#else	140	#else
43	# define CBOR_SLOW 0	141	# define CBOR_SLOW 0
44	# define CBOR_STASH cbor_stash	142	# define CBOR_STASH cbor_stash
45	#endif	143	#endif
46		144
47	static HV *cbor_stash, *cbor_boolean_stash; // CBOR::XS::	145	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
48	static SV *cbor_true, *cbor_false;	146	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
49		147
50	typedef struct {	148	typedef struct {
51	U32 flags;	149	U32 flags;
52	U32 max_depth;	150	U32 max_depth;
53	STRLEN max_size;	151	STRLEN max_size;
		152	SV *filter;
54		153
55	SV *cb_object;	154	// for the incremental parser
56	HV *cb_sk_object;	155	STRLEN incr_pos; // the current offset into the text
		156	STRLEN incr_need; // minimum bytes needed to decode
		157	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
57	} CBOR;	158	} CBOR;
58		159
59	INLINE void	160	ecb_inline void
60	cbor_init (CBOR *cbor)	161	cbor_init (CBOR *cbor)
61	{	162	{
62	Zero (cbor, 1, CBOR);	163	Zero (cbor, 1, CBOR);
63	cbor->max_depth = 512;	164	cbor->max_depth = 512;
64	}	165	}
65		166
		167	ecb_inline void
		168	cbor_free (CBOR *cbor)
		169	{
		170	SvREFCNT_dec (cbor->filter);
		171	SvREFCNT_dec (cbor->incr_count);
		172	}
		173
66	/////////////////////////////////////////////////////////////////////////////	174	/////////////////////////////////////////////////////////////////////////////
67	// utility functions	175	// utility functions
68		176
69	INLINE SV *	177	ecb_inline SV *
70	get_bool (const char *name)	178	get_bool (const char *name)
71	{	179	{
72	SV *sv = get_sv (name, 1);	180	SV *sv = get_sv (name, 1);
73		181
74	SvREADONLY_on (sv);	182	SvREADONLY_on (sv);
75	SvREADONLY_on (SvRV (sv));	183	SvREADONLY_on (SvRV (sv));
76		184
77	return sv;	185	return sv;
78	}	186	}
79		187
80	INLINE void	188	ecb_inline void
81	shrink (SV *sv)	189	shrink (SV *sv)
82	{	190	{
83	sv_utf8_downgrade (sv, 1);	191	sv_utf8_downgrade (sv, 1);
84		192
85	if (SvLEN (sv) > SvCUR (sv) + 1)	193	if (SvLEN (sv) > SvCUR (sv) + 1)
…		…
90	SvPV_renew (sv, SvCUR (sv) + 1);	198	SvPV_renew (sv, SvCUR (sv) + 1);
91	#endif	199	#endif
92	}	200	}
93	}	201	}
94		202
95	/////////////////////////////////////////////////////////////////////////////	203	// minimum length of a string to be registered for stringref
96	// fp hell	204	ecb_inline int
97		205	minimum_string_length (UV idx)
98	//TODO	206	{
		207	return idx <= 23 ? 3
		208	: idx <= 0xffU ? 4
		209	: idx <= 0xffffU ? 5
		210	: idx <= 0xffffffffU ? 7
		211	: 11;
		212	}
99		213
100	/////////////////////////////////////////////////////////////////////////////	214	/////////////////////////////////////////////////////////////////////////////
101	// encoder	215	// encoder
102		216
103	// structure used for encoding CBOR	217	// structure used for encoding CBOR
…		…
106	char *cur; // SvPVX (sv) + current output position	220	char *cur; // SvPVX (sv) + current output position
107	char *end; // SvEND (sv)	221	char *end; // SvEND (sv)
108	SV *sv; // result scalar	222	SV *sv; // result scalar
109	CBOR cbor;	223	CBOR cbor;
110	U32 depth; // recursion level	224	U32 depth; // recursion level
		225	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		226	UV stringref_idx;
		227	HV *shareable; // ptr => index, or 0
		228	UV shareable_idx;
111	} enc_t;	229	} enc_t;
112		230
113	INLINE void	231	ecb_inline void
114	need (enc_t *enc, STRLEN len)	232	need (enc_t *enc, STRLEN len)
115	{	233	{
116	if (expect_false (enc->cur + len >= enc->end))	234	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
117	{	235	{
118	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	236	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
119	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	237	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
120	enc->cur = SvPVX (enc->sv) + cur;	238	enc->cur = SvPVX (enc->sv) + cur;
121	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	239	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
122	}	240	}
123	}	241	}
124		242
125	INLINE void	243	ecb_inline void
126	encode_ch (enc_t *enc, char ch)	244	encode_ch (enc_t *enc, char ch)
127	{	245	{
128	need (enc, 1);	246	need (enc, 1);
129	*enc->cur++ = ch;	247	*enc->cur++ = ch;
130	}	248	}
131		249
		250	// used for tags, intregers, element counts and so on
132	static void	251	static void
133	encode_uint (enc_t *enc, int major, UV len)	252	encode_uint (enc_t *enc, int major, UV len)
134	{	253	{
135	need (enc, 9);	254	need (enc, 9);
136		255
137	if (len < 24)	256	if (ecb_expect_true (len < LENGTH_EXT1))
138	*enc->cur++ = major | len;	257	*enc->cur++ = major | len;
139	else if (len < 0x100)	258	else if (ecb_expect_true (len <= 0xffU))
140	{	259	{
141	*enc->cur++ = major | 24;	260	*enc->cur++ = major | LENGTH_EXT1;
142	*enc->cur++ = len;	261	*enc->cur++ = len;
143	}	262	}
144	else if (len < 0x10000)	263	else if (len <= 0xffffU)
145	{	264	{
146	*enc->cur++ = major | 25;	265	*enc->cur++ = major | LENGTH_EXT2;
147	*enc->cur++ = len >> 8;	266	*enc->cur++ = len >> 8;
148	*enc->cur++ = len;	267	*enc->cur++ = len;
149	}	268	}
150	else if (len < 0x100000000)	269	else if (len <= 0xffffffffU)
151	{	270	{
152	*enc->cur++ = major | 26;	271	*enc->cur++ = major | LENGTH_EXT4;
153	*enc->cur++ = len >> 24;	272	*enc->cur++ = len >> 24;
154	*enc->cur++ = len >> 16;	273	*enc->cur++ = len >> 16;
155	*enc->cur++ = len >> 8;	274	*enc->cur++ = len >> 8;
156	*enc->cur++ = len;	275	*enc->cur++ = len;
157	}	276	}
158	else if (len)	277	else
159	{	278	{
160	*enc->cur++ = major | 27;	279	*enc->cur++ = major | LENGTH_EXT8;
161	*enc->cur++ = len >> 56;	280	*enc->cur++ = len >> 56;
162	*enc->cur++ = len >> 48;	281	*enc->cur++ = len >> 48;
163	*enc->cur++ = len >> 40;	282	*enc->cur++ = len >> 40;
164	*enc->cur++ = len >> 32;	283	*enc->cur++ = len >> 32;
165	*enc->cur++ = len >> 24;	284	*enc->cur++ = len >> 24;
…		…
167	*enc->cur++ = len >> 8;	286	*enc->cur++ = len >> 8;
168	*enc->cur++ = len;	287	*enc->cur++ = len;
169	}	288	}
170	}	289	}
171		290
172	static void	291	// encodes a perl value into a CBOR integer
		292	ecb_inline
		293	encode_int (enc_t *enc, SV *sv)
		294	{
		295	if (SvIsUV (sv))
		296	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
		297	else if (SvIVX (sv) >= 0)
		298	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
		299	else
		300	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
		301	}
		302
		303	ecb_inline void
		304	encode_tag (enc_t *enc, UV tag)
		305	{
		306	encode_uint (enc, MAJOR_TAG, tag);
		307	}
		308
		309	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		310	ecb_noinline static void
173	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	311	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
174	{	312	{
175	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	313	STRLEN ulen = len;
		314	U8 *p, *pend = (U8 *)str + len;
		315
		316	for (p = (U8 *)str; p < pend; ++p)
		317	ulen += *p >> 7; // count set high bits
		318
		319	encode_uint (enc, MAJOR_TEXT, ulen);
		320
		321	need (enc, ulen);
		322	for (p = (U8 *)str; p < pend; ++p)
		323	if (*p < 0x80)
		324	*enc->cur++ = *p;
		325	else
		326	{
		327	*enc->cur++ = 0xc0 + (*p >> 6);
		328	*enc->cur++ = 0x80 + (*p & 63);
		329	}
		330	}
		331
		332	ecb_inline void
		333	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		334	{
		335	if (ecb_expect_false (upgrade_utf8))
		336	if (!utf8)
		337	{
		338	encode_str_utf8 (enc, utf8, str, len);
		339	return;
		340	}
		341
		342	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
176	need (enc, len);	343	need (enc, len);
177	memcpy (enc->cur, str, len);	344	memcpy (enc->cur, str, len);
178	enc->cur += len;	345	enc->cur += len;
179	}	346	}
180		347
		348	ecb_inline void
		349	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		350	{
		351	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		352	{
		353	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		354
		355	if (SvOK (*svp))
		356	{
		357	// already registered, use stringref
		358	encode_tag (enc, CBOR_TAG_STRINGREF);
		359	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		360	return;
		361	}
		362	else if (len >= minimum_string_length (enc->stringref_idx))
		363	{
		364	// register only
		365	sv_setuv (*svp, enc->stringref_idx);
		366	++enc->stringref_idx;
		367	}
		368	}
		369
		370	encode_str (enc, upgrade_utf8, utf8, str, len);
		371	}
		372
		373	ecb_inline void
		374	encode_float16 (enc_t *enc, NV nv)
		375	{
		376	need (enc, 1+2);
		377
		378	*enc->cur++ = MAJOR_MISC | MISC_FLOAT16;
		379
		380	uint16_t fp = ecb_float_to_binary16 (nv);
		381
		382	if (!ecb_big_endian ())
		383	fp = ecb_bswap16 (fp);
		384
		385	memcpy (enc->cur, &fp, 2);
		386	enc->cur += 2;
		387	}
		388
		389	ecb_inline void
		390	encode_float32 (enc_t *enc, NV nv)
		391	{
		392	need (enc, 1+4);
		393
		394	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
		395
		396	uint32_t fp = ecb_float_to_binary32 (nv);
		397
		398	if (!ecb_big_endian ())
		399	fp = ecb_bswap32 (fp);
		400
		401	memcpy (enc->cur, &fp, 4);
		402	enc->cur += 4;
		403	}
		404
		405	ecb_inline void
		406	encode_float64 (enc_t *enc, NV nv)
		407	{
		408	need (enc, 1+8);
		409
		410	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
		411
		412	uint64_t fp = ecb_double_to_binary64 (nv);
		413
		414	if (!ecb_big_endian ())
		415	fp = ecb_bswap64 (fp);
		416
		417	memcpy (enc->cur, &fp, 8);
		418	enc->cur += 8;
		419	}
		420
		421	ecb_inline void
		422	encode_forced (enc_t *enc, UV type, SV *sv)
		423	{
		424	switch (type)
		425	{
		426	case AS_CBOR:
		427	{
		428	STRLEN len;
		429	char *str = SvPVbyte (sv, len);
		430
		431	need (enc, len);
		432	memcpy (enc->cur, str, len);
		433	enc->cur += len;
		434	}
		435	break;
		436
		437	case AS_BYTES:
		438	{
		439	STRLEN len;
		440	char *str = SvPVbyte (sv, len);
		441	encode_strref (enc, 0, 0, str, len);
		442	}
		443	break;
		444
		445	case AS_TEXT:
		446	{
		447	STRLEN len;
		448	char *str = SvPVutf8 (sv, len);
		449	encode_strref (enc, 1, 1, str, len);
		450	}
		451	break;
		452
		453	case AS_FLOAT16: encode_float16 (enc, SvNV (sv)); break;
		454	case AS_FLOAT32: encode_float32 (enc, SvNV (sv)); break;
		455	case AS_FLOAT64: encode_float64 (enc, SvNV (sv)); break;
		456
		457	default:
		458	croak ("encountered malformed CBOR::XS::Tagged object");
		459	}
		460	}
		461
181	static void encode_sv (enc_t *enc, SV *sv);	462	static void encode_sv (enc_t *enc, SV *sv);
182		463
183	static void	464	static void
184	encode_av (enc_t *enc, AV *av)	465	encode_av (enc_t *enc, AV *av)
185	{	466	{
…		…
188	if (enc->depth >= enc->cbor.max_depth)	469	if (enc->depth >= enc->cbor.max_depth)
189	croak (ERR_NESTING_EXCEEDED);	470	croak (ERR_NESTING_EXCEEDED);
190		471
191	++enc->depth;	472	++enc->depth;
192		473
193	encode_uint (enc, 0x80, len + 1);	474	encode_uint (enc, MAJOR_ARRAY, len + 1);
194		475
		476	if (ecb_expect_false (SvMAGICAL (av)))
195	for (i = 0; i <= len; ++i)	477	for (i = 0; i <= len; ++i)
196	{	478	{
197	SV **svp = av_fetch (av, i, 0);	479	SV **svp = av_fetch (av, i, 0);
198	encode_sv (enc, svp ? *svp : &PL_sv_undef);	480	encode_sv (enc, svp ? *svp : &PL_sv_undef);
199	}	481	}
		482	else
		483	for (i = 0; i <= len; ++i)
		484	{
		485	SV *sv = AvARRAY (av)[i];
		486	encode_sv (enc, sv ? sv : &PL_sv_undef);
		487	}
200		488
201	--enc->depth;	489	--enc->depth;
202	}	490	}
203		491
204	static void	492	static void
…		…
212	++enc->depth;	500	++enc->depth;
213		501
214	int pairs = hv_iterinit (hv);	502	int pairs = hv_iterinit (hv);
215	int mg = SvMAGICAL (hv);	503	int mg = SvMAGICAL (hv);
216		504
217	if (mg)	505	if (ecb_expect_false (mg))
218	encode_ch (enc, 0xa0 | 31);	506	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
219	else	507	else
220	encode_uint (enc, 0xa0, pairs);	508	encode_uint (enc, MAJOR_MAP, pairs);
221		509
222	while ((he = hv_iternext (hv)))	510	while ((he = hv_iternext (hv)))
223	{	511	{
224	if (HeKLEN (he) == HEf_SVKEY)	512	if (HeKLEN (he) == HEf_SVKEY)
225	encode_sv (enc, HeSVKEY (he));	513	encode_sv (enc, HeSVKEY (he));
226	else	514	else
227	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	515	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
228		516
229	encode_sv (enc, expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	517	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
230	}	518	}
231		519
232	if (mg)	520	if (ecb_expect_false (mg))
233	encode_ch (enc, 0xe0 | 31);	521	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
234		522
235	--enc->depth;	523	--enc->depth;
236	}	524	}
237		525
238	// encode objects, arrays and special \0=false and \1=true values.	526	// encode objects, arrays and special \0=false and \1=true values.
239	static void	527	static void
240	encode_rv (enc_t *enc, SV *sv)	528	encode_rv (enc_t *enc, SV *sv)
241	{	529	{
242	svtype svt;
243
244	SvGETMAGIC (sv);	530	SvGETMAGIC (sv);
		531
245	svt = SvTYPE (sv);	532	svtype svt = SvTYPE (sv);
246		533
247	if (expect_false (SvOBJECT (sv)))	534	if (ecb_expect_false (SvOBJECT (sv)))
248	{	535	{
249	HV *stash = !CBOR_SLOW || cbor_boolean_stash	536	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
250	? cbor_boolean_stash	537	? types_boolean_stash
		538	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		539	HV *error_stash = !CBOR_SLOW || types_error_stash
		540	? types_error_stash
		541	: gv_stashpv ("Types::Serialiser::Error", 1);
		542	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		543	? cbor_tagged_stash
251	: gv_stashpv ("CBOR::XS::Boolean", 1);	544	: gv_stashpv ("CBOR::XS::Tagged" , 1);
252		545
253	if (SvSTASH (sv) == stash)	546	HV *stash = SvSTASH (sv);
254	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	547
		548	if (stash == boolean_stash)
		549	{
		550	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		551	return;
		552	}
		553	else if (stash == error_stash)
		554	{
		555	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		556	return;
		557	}
		558	else if (stash == tagged_stash)
		559	{
		560	if (svt != SVt_PVAV)
		561	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		562
		563	switch (av_len ((AV *)sv))
		564	{
		565	case 2-1:
		566	// actually a tagged value
		567	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
		568	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		569	break;
		570
		571	case 3-1:
		572	// a forced type [value, type, undef]
		573	encode_forced (enc, SvUV (*av_fetch ((AV *)sv, 1, 1)), *av_fetch ((AV *)sv, 0, 1));
		574	break;
		575
		576	default:
		577	croak ("encountered malformed CBOR::XS::Tagged object");
		578	}
		579
		580	return;
		581	}
		582	}
		583
		584	if (ecb_expect_false (SvREFCNT (sv) > 1)
		585	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		586	{
		587	if (ecb_expect_false (!enc->shareable))
		588	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		589
		590	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		591
		592	if (SvOK (*svp))
		593	{
		594	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		595	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		596	return;
		597	}
255	else	598	else
256	{	599	{
257	#if 0 //TODO	600	sv_setuv (*svp, enc->shareable_idx);
258	if (enc->cbor.flags & F_CONV_BLESSED)	601	++enc->shareable_idx;
		602	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		603	}
		604	}
		605
		606	if (ecb_expect_false (SvOBJECT (sv)))
		607	{
		608	HV *stash = SvSTASH (sv);
		609	GV *method;
		610
		611	if (enc->cbor.flags & F_FORBID_OBJECTS)
		612	croak ("encountered object '%s', but forbid_objects is enabled",
		613	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		614	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
259	{	615	{
		616	dSP;
		617
		618	ENTER; SAVETMPS;
		619	PUSHMARK (SP);
260	// we re-bless the reference to get overload and other niceties right	620	// 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)));	621	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
269		622
270	// calling with G_SCALAR ensures that we always get a 1 return value
271	PUTBACK;	623	PUTBACK;
		624	// G_SCALAR ensures that return value is 1
272	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	625	call_sv ((SV *)GvCV (method), G_SCALAR);
273	SPAGAIN;	626	SPAGAIN;
274		627
275	// catch this surprisingly common error	628	// catch this surprisingly common error
276	if (SvROK (TOPs) && SvRV (TOPs) == sv)	629	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)));	630	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
278		631
279	sv = POPs;
280	PUTBACK;
281
282	encode_sv (enc, sv);	632	encode_sv (enc, POPs);
283		633
		634	PUTBACK;
		635
284	FREETMPS; LEAVE;	636	FREETMPS; LEAVE;
285	}	637	}
286	else if (enc->cbor.flags & F_ALLOW_BLESSED)	638	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
287	encode_str (enc, "null", 4, 0);	639	{
288	else	640	dSP;
289	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it",	641
290	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	642	ENTER; SAVETMPS;
		643	PUSHMARK (SP);
		644	EXTEND (SP, 2);
		645	// we re-bless the reference to get overload and other niceties right
		646	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		647	PUSHs (sv_cbor);
		648
		649	PUTBACK;
		650	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		651	SPAGAIN;
		652
		653	// catch this surprisingly common error
		654	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		655	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		656
		657	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		658	encode_uint (enc, MAJOR_ARRAY, count + 1);
		659	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		660
		661	{
		662	int i;
		663
		664	for (i = 0; i < count; ++i)
		665	encode_sv (enc, SP[i + 1 - count]);
		666
		667	SP -= count;
291	}	668	}
292	else if (enc->cbor.flags & F_ALLOW_BLESSED)	669
293	encode_str (enc, "null", 4, 0);	670	PUTBACK;
		671
		672	FREETMPS; LEAVE;
		673	}
294	else	674	else
295	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	675	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
296	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	676	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
297	#endif
298	}
299	}	677	}
300	else if (svt == SVt_PVHV)	678	else if (svt == SVt_PVHV)
301	encode_hv (enc, (HV *)sv);	679	encode_hv (enc, (HV *)sv);
302	else if (svt == SVt_PVAV)	680	else if (svt == SVt_PVAV)
303	encode_av (enc, (AV *)sv);	681	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	682	else
322	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	683	{
323	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	684	encode_tag (enc, CBOR_TAG_INDIRECTION);
		685	encode_sv (enc, sv);
		686	}
324	}	687	}
325		688
326	static void	689	static void
327	encode_nv (enc_t *enc, SV *sv)	690	encode_nv (enc_t *enc, SV *sv)
328	{	691	{
329	double nv = SvNVX (sv);	692	double nv = SvNVX (sv);
330		693
331	need (enc, 9);	694	need (enc, 9);
332		695
333	if (expect_false (nv == (U32)nv))	696	if (ecb_expect_false (nv == (NV)(U32)nv))
334	encode_uint (enc, 0x00, (U32)nv);	697	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
335	//TODO: maybe I32?	698	//TODO: maybe I32?
336	else if (expect_false (nv == (float)nv))	699	else if (ecb_expect_false (nv == (float)nv))
337	{	700	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	701	else
349	{	702	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	}	703	}
361		704
362	static void	705	static void
363	encode_sv (enc_t *enc, SV *sv)	706	encode_sv (enc_t *enc, SV *sv)
364	{	707	{
…		…
366		709
367	if (SvPOKp (sv))	710	if (SvPOKp (sv))
368	{	711	{
369	STRLEN len;	712	STRLEN len;
370	char *str = SvPV (sv, len);	713	char *str = SvPV (sv, len);
371	encode_str (enc, SvUTF8 (sv), str, len);	714	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
372	}	715	}
373	else if (SvNOKp (sv))	716	else if (SvNOKp (sv))
374	encode_nv (enc, sv);	717	encode_nv (enc, sv);
375	else if (SvIOKp (sv))	718	else if (SvIOKp (sv))
376	{	719	encode_int (e,v 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))	720	else if (SvROK (sv))
385	encode_rv (enc, SvRV (sv));	721	encode_rv (enc, SvRV (sv));
386	else if (!SvOK (sv))	722	else if (!SvOK (sv))
387	encode_ch (enc, 0xe0 | 22);	723	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
388	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	724	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
389	encode_ch (enc, 0xe0 | 23);	725	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
390	else	726	else
391	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	727	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
392	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	728	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
393	}	729	}
394		730
395	static SV *	731	static SV *
396	encode_cbor (SV *scalar, CBOR *cbor)	732	encode_cbor (SV *scalar, CBOR *cbor)
397	{	733	{
398	enc_t enc;	734	enc_t enc = { 0 };
399		735
400	enc.cbor = *cbor;	736	enc.cbor = *cbor;
401	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	737	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
402	enc.cur = SvPVX (enc.sv);	738	enc.cur = SvPVX (enc.sv);
403	enc.end = SvEND (enc.sv);	739	enc.end = SvEND (enc.sv);
404	enc.depth = 0;
405		740
406	SvPOK_only (enc.sv);	741	SvPOK_only (enc.sv);
		742
		743	if (cbor->flags & F_PACK_STRINGS)
		744	{
		745	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		746	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		747	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		748	}
		749
407	encode_sv (&enc, scalar);	750	encode_sv (&enc, scalar);
408		751
409	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	752	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
410	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	753	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
411		754
…		…
425	U8 *end; // end of input string	768	U8 *end; // end of input string
426	const char *err; // parse error, if != 0	769	const char *err; // parse error, if != 0
427	CBOR cbor;	770	CBOR cbor;
428	U32 depth; // recursion depth	771	U32 depth; // recursion depth
429	U32 maxdepth; // recursion depth limit	772	U32 maxdepth; // recursion depth limit
		773	AV *shareable;
		774	AV *stringref;
		775	SV *decode_tagged;
		776	SV *err_sv; // optional sv for error, needs to be freed
430	} dec_t;	777	} dec_t;
431		778
432	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	779	// set dec->err to ERRSV
		780	ecb_cold static void
		781	err_errsv (dec_t *dec)
		782	{
		783	if (!dec->err)
		784	{
		785	dec->err_sv = newSVsv (ERRSV);
433		786
434	#define WANT(len) if (expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data");	787	// chop off the trailing \n
		788	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		789	*SvEND (dec->err_sv) = 0;
435		790
		791	dec->err = SvPVutf8_nolen (dec->err_sv);
		792	}
		793	}
		794
		795	// the following functions are used to reduce code size and help the compiler to optimise
		796	ecb_cold static void
		797	err_set (dec_t *dec, const char *reason)
		798	{
		799	if (!dec->err)
		800	dec->err = reason;
		801	}
		802
		803	ecb_cold static void
		804	err_unexpected_end (dec_t *dec)
		805	{
		806	err_set (dec, "unexpected end of CBOR data");
		807	}
		808
		809	#define ERR_DO(do) SB do; goto fail; SE
		810	#define ERR(reason) ERR_DO (err_set (dec, reason))
		811	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		812
		813	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		814
436	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	815	#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	816	#define DEC_DEC_DEPTH --dec->depth
438		817
439	static UV	818	static UV
440	decode_uint (dec_t *dec)	819	decode_uint (dec_t *dec)
441	{	820	{
442	switch (*dec->cur & 31)	821	U8 m = *dec->cur & MINOR_MASK;
443	{	822	++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		823
449	case 24:	824	if (ecb_expect_true (m < LENGTH_EXT1))
		825	return m;
		826	else if (ecb_expect_true (m == LENGTH_EXT1))
		827	{
450	WANT (2);	828	WANT (1);
451	dec->cur += 2;	829	dec->cur += 1;
452	return dec->cur[-1];	830	return dec->cur[-1];
453		831	}
454	case 25:	832	else if (ecb_expect_true (m == LENGTH_EXT2))
		833	{
455	WANT (3);	834	WANT (2);
456	dec->cur += 3;	835	dec->cur += 2;
457	return (((UV)dec->cur[-2]) << 8)	836	return (((UV)dec->cur[-2]) << 8)
458	| ((UV)dec->cur[-1]);	837	| ((UV)dec->cur[-1]);
459		838	}
460	case 26:	839	else if (ecb_expect_true (m == LENGTH_EXT4))
		840	{
461	WANT (5);	841	WANT (4);
462	dec->cur += 5;	842	dec->cur += 4;
463	return (((UV)dec->cur[-4]) << 24)	843	return (((UV)dec->cur[-4]) << 24)
464	| (((UV)dec->cur[-3]) << 16)	844	| (((UV)dec->cur[-3]) << 16)
465	| (((UV)dec->cur[-2]) << 8)	845	| (((UV)dec->cur[-2]) << 8)
466	| ((UV)dec->cur[-1]);	846	| ((UV)dec->cur[-1]);
467		847	}
468	case 27:	848	else if (ecb_expect_true (m == LENGTH_EXT8))
		849	{
469	WANT (9);	850	WANT (8);
470	dec->cur += 9;	851	dec->cur += 8;
		852
		853	return
		854	#if UVSIZE < 8
		855	0
		856	#else
471	return (((UV)dec->cur[-8]) << 56)	857	(((UV)dec->cur[-8]) << 56)
472	| (((UV)dec->cur[-7]) << 48)	858	| (((UV)dec->cur[-7]) << 48)
473	| (((UV)dec->cur[-6]) << 40)	859	| (((UV)dec->cur[-6]) << 40)
474	| (((UV)dec->cur[-5]) << 32)	860	| (((UV)dec->cur[-5]) << 32)
		861	#endif
475	| (((UV)dec->cur[-4]) << 24)	862	| (((UV)dec->cur[-4]) << 24)
476	| (((UV)dec->cur[-3]) << 16)	863	| (((UV)dec->cur[-3]) << 16)
477	| (((UV)dec->cur[-2]) << 8)	864	| (((UV)dec->cur[-2]) << 8)
478	| ((UV)dec->cur[-1]);	865	| ((UV)dec->cur[-1]);
479		866	}
480	default:	867	else
481	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	868	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
482	}
483		869
484	fail:	870	fail:
485	return 0;	871	return 0;
486	}	872	}
487		873
…		…
492	{	878	{
493	AV *av = newAV ();	879	AV *av = newAV ();
494		880
495	DEC_INC_DEPTH;	881	DEC_INC_DEPTH;
496		882
497	if ((*dec->cur & 31) == 31)	883	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
498	{	884	{
499	++dec->cur;	885	++dec->cur;
500		886
501	for (;;)	887	for (;;)
502	{	888	{
503	WANT (1);	889	WANT (1);
504		890
505	if (*dec->cur == (0xe0 | 31))	891	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
506	{	892	{
507	++dec->cur;	893	++dec->cur;
508	break;	894	break;
509	}	895	}
510		896
511	av_push (av, decode_sv (dec));	897	av_push (av, decode_sv (dec));
512	}	898	}
513	}	899	}
514	else	900	else
515	{	901	{
516	int i, len = decode_uint (dec);	902	UV i, len = decode_uint (dec);
517		903
		904	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);	905	av_fill (av, len - 1);
519		906
520	for (i = 0; i < len; ++i)	907	for (i = 0; i < len; ++i)
521	AvARRAY (av)[i] = decode_sv (dec);	908	AvARRAY (av)[i] = decode_sv (dec);
522	}	909	}
523		910
524	DEC_DEC_DEPTH;	911	DEC_DEC_DEPTH;
525	return newRV_noinc ((SV *)av);	912	return newRV_noinc ((SV *)av);
526		913
527	fail:	914	fail:
528	SvREFCNT_dec (av);	915	SvREFCNT_dec_NN (av);
529	DEC_DEC_DEPTH;	916	DEC_DEC_DEPTH;
530	return &PL_sv_undef;	917	return &PL_sv_undef;
531	}	918	}
532		919
		920	static void
		921	decode_he (dec_t *dec, HV *hv)
		922	{
		923	// for speed reasons, we specialcase single-string
		924	// byte or utf-8 strings as keys, but only when !stringref
		925
		926	if (ecb_expect_true (!dec->stringref))
		927	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		928	{
		929	STRLEN len = decode_uint (dec);
		930	char *key = (char *)dec->cur;
		931
		932	WANT (len);
		933	dec->cur += len;
		934
		935	hv_store (hv, key, len, decode_sv (dec), 0);
		936
		937	return;
		938	}
		939	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		940	{
		941	STRLEN len = decode_uint (dec);
		942	char *key = (char *)dec->cur;
		943
		944	WANT (len);
		945	dec->cur += len;
		946
		947	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		948	if (!is_utf8_string (key, len))
		949	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		950
		951	hv_store (hv, key, -len, decode_sv (dec), 0);
		952
		953	return;
		954	}
		955
		956	SV *k = decode_sv (dec);
		957	SV *v = decode_sv (dec);
		958
		959	// we leak memory if uncaught exceptions are thrown by random magical
		960	// methods, and this is hopefully the only place where it can happen,
		961	// so if there is a chance of an exception, take the very slow path.
		962	// since catching exceptions is "undocumented/internal/forbidden" by
		963	// the new p5p powers, we need to call out to a perl function :/
		964	if (ecb_expect_false (SvAMAGIC (k)))
		965	{
		966	dSP;
		967
		968	ENTER; SAVETMPS;
		969	PUSHMARK (SP);
		970	EXTEND (SP, 3);
		971	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		972	PUSHs (sv_2mortal (k));
		973	PUSHs (sv_2mortal (v));
		974
		975	PUTBACK;
		976	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		977	SPAGAIN;
		978
		979	FREETMPS; LEAVE;
		980
		981	if (SvTRUE (ERRSV))
		982	ERR_ERRSV;
		983
		984	return;
		985	}
		986
		987	hv_store_ent (hv, k, v, 0);
		988	SvREFCNT_dec_NN (k);
		989
		990	fail:
		991	;
		992	}
		993
533	static SV *	994	static SV *
534	decode_hv (dec_t *dec)	995	decode_hv (dec_t *dec)
535	{	996	{
536	HV *hv = newHV ();	997	HV *hv = newHV ();
537		998
538	DEC_INC_DEPTH;	999	DEC_INC_DEPTH;
539		1000
540	if ((*dec->cur & 31) == 31)	1001	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
541	{	1002	{
542	++dec->cur;	1003	++dec->cur;
543		1004
544	for (;;)	1005	for (;;)
545	{	1006	{
546	WANT (1);	1007	WANT (1);
547		1008
548	if (*dec->cur == (0xe0 | 31))	1009	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
549	{	1010	{
550	++dec->cur;	1011	++dec->cur;
551	break;	1012	break;
552	}	1013	}
553		1014
554	SV *k = decode_sv (dec);	1015	decode_he (dec, hv);
555	SV *v = decode_sv (dec);
556
557	hv_store_ent (hv, k, v, 0);
558	}	1016	}
559	}	1017	}
560	else	1018	else
561	{	1019	{
562	int len = decode_uint (dec);	1020	UV pairs = decode_uint (dec);
563		1021
		1022	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1023
564	while (len--)	1024	while (pairs--)
565	{	1025	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	}	1026	}
572		1027
573	DEC_DEC_DEPTH;	1028	DEC_DEC_DEPTH;
574	return newRV_noinc ((SV *)hv);	1029	return newRV_noinc ((SV *)hv);
575		1030
576	#if 0	1031	fail:
577	SV *sv;	1032	SvREFCNT_dec_NN (hv);
578	HV *hv = newHV ();
579
580	DEC_INC_DEPTH;	1033	DEC_DEC_DEPTH;
581	decode_ws (dec);	1034	return &PL_sv_undef;
		1035	}
582		1036
583	for (;;)	1037	static SV *
584	{	1038	decode_str (dec_t *dec, int utf8)
585	// heuristic: assume that	1039	{
586	// a) decode_str + hv_store_ent are abysmally slow.	1040	SV *sv = 0;
587	// b) most hash keys are short, simple ascii text.	1041
588	// => try to "fast-match" such strings to avoid	1042	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
589	// the overhead of decode_str + hv_store_ent.
590	{	1043	{
591	SV *value;	1044	// indefinite length strings
592	char *p = dec->cur;	1045	++dec->cur;
593	char *e = p + 24; // only try up to 24 bytes
594		1046
		1047	U8 major = *dec->cur & MAJOR_MISC;
		1048
		1049	sv = newSVpvn ("", 0);
		1050
595	for (;;)	1051	for (;;)
596	{	1052	{
597	// the >= 0x80 is false on most architectures	1053	WANT (1);
598	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')	1054
		1055	if ((*dec->cur - major) > LENGTH_EXT8)
		1056	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
599	{	1057	{
600	// slow path, back up and use decode_str	1058	++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;	1059	break;
619	}	1060	}
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	{	1061	else
685	dSP;	1062	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
686	int count;
687		1063
688	ENTER; SAVETMPS; PUSHMARK (SP);	1064	STRLEN len = decode_uint (dec);
689	XPUSHs (HeVAL (he));
690	sv_2mortal (sv);
691		1065
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);	1066	WANT (len);
752		1067	sv_catpvn (sv, dec->cur, len);
753	if (*dec->cur == (0xe0 | 31))	1068	dec->cur += len;
754	{
755	++dec->cur;
756	break;
757	}
758
759	SV *sv2 = decode_sv (dec);
760	sv_catsv (sv, sv2);
761	}	1069	}
762	}	1070	}
763	else	1071	else
764	{	1072	{
765	STRLEN len = decode_uint (dec);	1073	STRLEN len = decode_uint (dec);
766		1074
767	WANT (len);	1075	WANT (len);
768	sv = newSVpvn (dec->cur, len);	1076	sv = newSVpvn (dec->cur, len);
769	dec->cur += len;	1077	dec->cur += len;
		1078
		1079	if (ecb_expect_false (dec->stringref)
		1080	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		1081	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
770	}	1082	}
771		1083
772	if (utf8)	1084	if (utf8)
		1085	{
		1086	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		1087	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		1088	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		1089
773	SvUTF8_on (sv);	1090	SvUTF8_on (sv);
		1091	}
774		1092
775	return sv;	1093	return sv;
776		1094
777	fail:	1095	fail:
		1096	SvREFCNT_dec (sv);
778	return &PL_sv_undef;	1097	return &PL_sv_undef;
779	}	1098	}
780		1099
781	static SV *	1100	static SV *
782	decode_tagged (dec_t *dec)	1101	decode_tagged (dec_t *dec)
783	{	1102	{
		1103	SV *sv = 0;
784	UV tag = decode_uint (dec);	1104	UV tag = decode_uint (dec);
		1105
		1106	WANT (1);
		1107
		1108	switch (tag)
		1109	{
		1110	case CBOR_TAG_MAGIC:
785	SV *sv = decode_sv (dec);	1111	sv = decode_sv (dec);
		1112	break;
786		1113
787	if (tag == 55799) // 2.4.5 Self-Describe CBOR	1114	case CBOR_TAG_INDIRECTION:
		1115	sv = newRV_noinc (decode_sv (dec));
		1116	break;
		1117
		1118	case CBOR_TAG_STRINGREF_NAMESPACE:
		1119	{
		1120	// do not use SAVETMPS/FREETMPS, as these will
		1121	// erase mortalised caches, e.g. "shareable"
		1122	ENTER;
		1123
		1124	SAVESPTR (dec->stringref);
		1125	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1126
		1127	sv = decode_sv (dec);
		1128
		1129	LEAVE;
		1130	}
		1131	break;
		1132
		1133	case CBOR_TAG_STRINGREF:
		1134	{
		1135	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1136	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1137
		1138	UV idx = decode_uint (dec);
		1139
		1140	if (!dec->stringref || idx >= (UV)(1 + AvFILLp (dec->stringref)))
		1141	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1142
		1143	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1144	}
		1145	break;
		1146
		1147	case CBOR_TAG_VALUE_SHAREABLE:
		1148	{
		1149	if (ecb_expect_false (!dec->shareable))
		1150	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1151
		1152	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1153	{
		1154	sv = newSV (0);
		1155	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1156
		1157	SV *osv = decode_sv (dec);
		1158	sv_setsv (sv, osv);
		1159	SvREFCNT_dec_NN (osv);
		1160	}
		1161	else
		1162	{
		1163	av_push (dec->shareable, &PL_sv_undef);
		1164	int idx = AvFILLp (dec->shareable);
		1165	sv = decode_sv (dec);
		1166	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1167	}
		1168	}
		1169	break;
		1170
		1171	case CBOR_TAG_VALUE_SHAREDREF:
		1172	{
		1173	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1174	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1175
		1176	UV idx = decode_uint (dec);
		1177
		1178	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
		1179	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1180
		1181	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1182
		1183	if (sv == &PL_sv_undef)
		1184	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1185	}
		1186	break;
		1187
		1188	case CBOR_TAG_PERL_OBJECT:
		1189	{
		1190	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1191	goto filter;
		1192
		1193	sv = decode_sv (dec);
		1194
		1195	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1196	ERR ("corrupted CBOR data (non-array perl object)");
		1197
		1198	AV *av = (AV *)SvRV (sv);
		1199	int len = av_len (av) + 1;
		1200	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1201
		1202	if (!stash)
		1203	ERR ("cannot decode perl-object (package does not exist)");
		1204
		1205	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1206
		1207	if (!method)
		1208	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1209
		1210	dSP;
		1211
		1212	ENTER; SAVETMPS;
		1213	PUSHMARK (SP);
		1214	EXTEND (SP, len + 1);
		1215	// we re-bless the reference to get overload and other niceties right
		1216	PUSHs (*av_fetch (av, 0, 1));
		1217	PUSHs (sv_cbor);
		1218
		1219	int i;
		1220
		1221	for (i = 1; i < len; ++i)
		1222	PUSHs (*av_fetch (av, i, 1));
		1223
		1224	PUTBACK;
		1225	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1226	SPAGAIN;
		1227
		1228	if (SvTRUE (ERRSV))
		1229	{
		1230	FREETMPS; LEAVE;
		1231	ERR_ERRSV;
		1232	}
		1233
		1234	SvREFCNT_dec_NN (sv);
		1235	sv = SvREFCNT_inc (POPs);
		1236
		1237	PUTBACK;
		1238
		1239	FREETMPS; LEAVE;
		1240	}
		1241	break;
		1242
		1243	default:
		1244	filter:
		1245	{
		1246	SV *tag_sv = newSVuv (tag);
		1247
		1248	sv = decode_sv (dec);
		1249
		1250	dSP;
		1251	ENTER; SAVETMPS;
		1252	PUSHMARK (SP);
		1253	EXTEND (SP, 2);
		1254	PUSHs (tag_sv);
		1255	PUSHs (sv);
		1256
		1257	PUTBACK;
		1258	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1259	SPAGAIN;
		1260
		1261	if (SvTRUE (ERRSV))
		1262	{
		1263	SvREFCNT_dec_NN (tag_sv);
		1264	FREETMPS; LEAVE;
		1265	ERR_ERRSV;
		1266	}
		1267
		1268	if (count)
		1269	{
		1270	SvREFCNT_dec_NN (tag_sv);
		1271	SvREFCNT_dec_NN (sv);
		1272	sv = SvREFCNT_inc_NN (TOPs);
		1273	SP -= count;
		1274	}
		1275	else
		1276	{
		1277	AV *av = newAV ();
		1278	av_push (av, tag_sv);
		1279	av_push (av, sv);
		1280
		1281	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1282	? cbor_tagged_stash
		1283	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1284	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1285	}
		1286
		1287	PUTBACK;
		1288
		1289	FREETMPS; LEAVE;
		1290	}
		1291	break;
		1292	}
		1293
788	return sv;	1294	return sv;
789		1295
790	AV *av = newAV ();	1296	fail:
791	av_push (av, newSVuv (tag));	1297	SvREFCNT_dec (sv);
792	av_push (av, sv);	1298	return &PL_sv_undef;
793	return newRV_noinc ((SV *)av);
794	}	1299	}
795		1300
796	static SV *	1301	static SV *
797	decode_sv (dec_t *dec)	1302	decode_sv (dec_t *dec)
798	{	1303	{
799	WANT (1);	1304	WANT (1);
800		1305
801	switch (*dec->cur >> 5)	1306	switch (*dec->cur >> MAJOR_SHIFT)
802	{	1307	{
803	case 0: // unsigned int	1308	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
804	//TODO: 64 bit values on 3 2bit perls	1309	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
805	return newSVuv (decode_uint (dec));	1310	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
806	case 1: // negative int	1311	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
807	return newSViv (-1 - (IV)decode_uint (dec));	1312	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
808	case 2: // octet string	1313	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
809	return decode_str (dec, 0);	1314	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
810	case 3: // utf-8 string	1315
811	return decode_str (dec, 1);	1316	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)	1317	switch (*dec->cur++ & MINOR_MASK)
820	{	1318	{
821	case 20:	1319	case SIMPLE_FALSE:
822	#if CBOR_SLOW	1320	#if CBOR_SLOW
823	cbor_false = get_bool ("CBOR::XS::false");	1321	types_false = get_bool ("Types::Serialiser::false");
824	#endif	1322	#endif
825	return newSVsv (cbor_false);	1323	return newSVsv (types_false);
826	case 21:	1324	case SIMPLE_TRUE:
827	#if CBOR_SLOW	1325	#if CBOR_SLOW
828	cbor_true = get_bool ("CBOR::XS::true");	1326	types_true = get_bool ("Types::Serialiser::true");
829	#endif	1327	#endif
830	return newSVsv (cbor_true);	1328	return newSVsv (types_true);
831	case 22:	1329	case SIMPLE_NULL:
832	return newSVsv (&PL_sv_undef);	1330	return newSVsv (&PL_sv_undef);
		1331	case SIMPLE_UNDEF:
		1332	#if CBOR_SLOW
		1333	types_error = get_bool ("Types::Serialiser::error");
		1334	#endif
		1335	return newSVsv (types_error);
833		1336
834	case 25:	1337	case MISC_FLOAT16:
835	{	1338	{
836	WANT (2);	1339	WANT (2);
837		1340
838	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1341	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
839	dec->cur += 2;	1342	dec->cur += 2;
840		1343
841	return newSVnv (ecb_binary16_to_float (fp));	1344	return newSVnv (ecb_binary16_to_float (fp));
842	}	1345	}
843		1346
844	case 26:	1347	case MISC_FLOAT32:
845	{	1348	{
846	uint32_t fp;	1349	uint32_t fp;
847	WANT (4);	1350	WANT (4);
848	memcpy (&fp, dec->cur, 4);	1351	memcpy (&fp, dec->cur, 4);
849	dec->cur += 4;	1352	dec->cur += 4;
…		…
852	fp = ecb_bswap32 (fp);	1355	fp = ecb_bswap32 (fp);
853		1356
854	return newSVnv (ecb_binary32_to_float (fp));	1357	return newSVnv (ecb_binary32_to_float (fp));
855	}	1358	}
856		1359
857	case 27:	1360	case MISC_FLOAT64:
858	{	1361	{
859	uint64_t fp;	1362	uint64_t fp;
860	WANT (8);	1363	WANT (8);
861	memcpy (&fp, dec->cur, 8);	1364	memcpy (&fp, dec->cur, 8);
862	dec->cur += 8;	1365	dec->cur += 8;
…		…
865	fp = ecb_bswap64 (fp);	1368	fp = ecb_bswap64 (fp);
866		1369
867	return newSVnv (ecb_binary64_to_double (fp));	1370	return newSVnv (ecb_binary64_to_double (fp));
868	}	1371	}
869		1372
870	// 0..19 unassigned	1373	// 0..19 unassigned simple
871	// 24 reserved + unassigned (reserved values are not encodable)	1374	// 24 reserved + unassigned simple (reserved values are not encodable)
		1375	// 28-30 unassigned misc
		1376	// 31 break code
872	default:	1377	default:
873	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1378	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
874	}	1379	}
875		1380
876	break;	1381	break;
877	}	1382	}
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		1383
935	fail:	1384	fail:
936	return &PL_sv_undef;	1385	return &PL_sv_undef;
937	}	1386	}
938		1387
939	static SV *	1388	static SV *
940	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1389	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
941	{	1390	{
942	dec_t dec;	1391	dec_t dec = { 0 };
943	SV *sv;	1392	SV *sv;
		1393	STRLEN len;
		1394	char *data = SvPVbyte (string, len);
944		1395
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)	1396	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",	1397	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);	1398	(unsigned long)len, (unsigned long)cbor->max_size);
976	}
977
978	sv_utf8_downgrade (string, 0);
979		1399
980	dec.cbor = *cbor;	1400	dec.cbor = *cbor;
981	dec.cur = (U8 *)SvPVX (string);	1401	dec.cur = (U8 *)data;
982	dec.end = (U8 *)SvEND (string);	1402	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		1403
989	sv = decode_sv (&dec);	1404	sv = decode_sv (&dec);
990		1405
991	if (offset_return)	1406	if (offset_return)
992	*offset_return = dec.cur;	1407	*offset_return = dec.cur;
…		…
995	if (dec.cur != dec.end && !dec.err)	1410	if (dec.cur != dec.end && !dec.err)
996	dec.err = "garbage after CBOR object";	1411	dec.err = "garbage after CBOR object";
997		1412
998	if (dec.err)	1413	if (dec.err)
999	{	1414	{
		1415	if (dec.shareable)
		1416	{
		1417	// need to break cyclic links, which would all be in shareable
		1418	int i;
		1419	SV **svp;
		1420
		1421	for (i = av_len (dec.shareable) + 1; i--; )
		1422	if ((svp = av_fetch (dec.shareable, i, 0)))
		1423	sv_setsv (*svp, &PL_sv_undef);
		1424	}
		1425
1000	SvREFCNT_dec (sv);	1426	SvREFCNT_dec_NN (sv);
		1427
		1428	if (dec.err_sv)
		1429	sv_2mortal (dec.err_sv);
		1430
1001	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1431	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
1002	}	1432	}
1003		1433
1004	sv = sv_2mortal (sv);	1434	sv = sv_2mortal (sv);
1005		1435
1006	return sv;	1436	return sv;
1007	}	1437	}
1008		1438
		1439	/////////////////////////////////////////////////////////////////////////////
		1440	// incremental parser
		1441
		1442	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1443
		1444	// returns 0 for notyet, 1 for success or error
		1445	static int
		1446	incr_parse (CBOR *self, SV *cborstr)
		1447	{
		1448	STRLEN cur;
		1449	SvPV (cborstr, cur);
		1450
		1451	while (ecb_expect_true (self->incr_need <= cur))
		1452	{
		1453	// table of integer count bytes
		1454	static I8 incr_len[MINOR_MASK + 1] = {
		1455	0, 0, 0, 0, 0, 0, 0, 0,
		1456	0, 0, 0, 0, 0, 0, 0, 0,
		1457	0, 0, 0, 0, 0, 0, 0, 0,
		1458	1, 2, 4, 8,-1,-1,-1,-2
		1459	};
		1460
		1461	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1462	U8 m = *p & MINOR_MASK;
		1463	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1464	I8 ilen = incr_len[m];
		1465
		1466	self->incr_need = self->incr_pos + 1;
		1467
		1468	if (ecb_expect_false (ilen < 0))
		1469	{
		1470	if (m != MINOR_INDEF)
		1471	return 1; // error
		1472
		1473	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1474	{
		1475	if (count >= 0)
		1476	return 1; // error
		1477
		1478	count = 1;
		1479	}
		1480	else
		1481	{
		1482	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1483	count = -1;
		1484	}
		1485	}
		1486	else
		1487	{
		1488	self->incr_need += ilen;
		1489	if (ecb_expect_false (self->incr_need > cur))
		1490	return 0;
		1491
		1492	int major = *p >> MAJOR_SHIFT;
		1493
		1494	switch (major)
		1495	{
		1496	case MAJOR_TAG >> MAJOR_SHIFT:
		1497	++count; // tags merely prefix another value
		1498	break;
		1499
		1500	case MAJOR_BYTES >> MAJOR_SHIFT:
		1501	case MAJOR_TEXT >> MAJOR_SHIFT:
		1502	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1503	case MAJOR_MAP >> MAJOR_SHIFT:
		1504	{
		1505	UV len;
		1506
		1507	if (ecb_expect_false (ilen))
		1508	{
		1509	len = 0;
		1510
		1511	do {
		1512	len = (len << 8) | *++p;
		1513	} while (--ilen);
		1514	}
		1515	else
		1516	len = m;
		1517
		1518	switch (major)
		1519	{
		1520	case MAJOR_BYTES >> MAJOR_SHIFT:
		1521	case MAJOR_TEXT >> MAJOR_SHIFT:
		1522	self->incr_need += len;
		1523	if (ecb_expect_false (self->incr_need > cur))
		1524	return 0;
		1525
		1526	break;
		1527
		1528	case MAJOR_MAP >> MAJOR_SHIFT:
		1529	len <<= 1;
		1530	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1531	if (len)
		1532	{
		1533	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1534	count = len + 1;
		1535	}
		1536	break;
		1537	}
		1538	}
		1539	}
		1540	}
		1541
		1542	self->incr_pos = self->incr_need;
		1543
		1544	if (count > 0)
		1545	{
		1546	while (!--count)
		1547	{
		1548	if (!AvFILLp (self->incr_count))
		1549	return 1; // done
		1550
		1551	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1552	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1553	}
		1554
		1555	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1556	}
		1557	}
		1558
		1559	return 0;
		1560	}
		1561
		1562
1009	/////////////////////////////////////////////////////////////////////////////	1563	/////////////////////////////////////////////////////////////////////////////
1010	// XS interface functions	1564	// XS interface functions
1011		1565
1012	MODULE = CBOR::XS PACKAGE = CBOR::XS	1566	MODULE = CBOR::XS PACKAGE = CBOR::XS
1013		1567
1014	BOOT:	1568	BOOT:
1015	{	1569	{
1016	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1570	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1017	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1571	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1018		1572
1019	cbor_true = get_bool ("CBOR::XS::true");	1573	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1020	cbor_false = get_bool ("CBOR::XS::false");	1574	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1575
		1576	types_true = get_bool ("Types::Serialiser::true" );
		1577	types_false = get_bool ("Types::Serialiser::false");
		1578	types_error = get_bool ("Types::Serialiser::error");
		1579
		1580	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1581
		1582	sv_cbor = newSVpv ("CBOR", 0);
		1583	SvREADONLY_on (sv_cbor);
		1584
		1585	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
1021	}	1586	}
1022		1587
1023	PROTOTYPES: DISABLE	1588	PROTOTYPES: DISABLE
1024		1589
1025	void CLONE (...)	1590	void CLONE (...)
1026	CODE:	1591	CODE:
1027	cbor_stash = 0;	1592	cbor_stash = 0;
		1593	cbor_tagged_stash = 0;
		1594	types_error_stash = 0;
1028	cbor_boolean_stash = 0;	1595	types_boolean_stash = 0;
1029		1596
1030	void new (char *klass)	1597	void new (char *klass)
1031	PPCODE:	1598	PPCODE:
1032	{	1599	{
1033	SV *pv = NEWSV (0, sizeof (CBOR));	1600	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1041		1608
1042	void shrink (CBOR *self, int enable = 1)	1609	void shrink (CBOR *self, int enable = 1)
1043	ALIAS:	1610	ALIAS:
1044	shrink = F_SHRINK	1611	shrink = F_SHRINK
1045	allow_unknown = F_ALLOW_UNKNOWN	1612	allow_unknown = F_ALLOW_UNKNOWN
		1613	allow_sharing = F_ALLOW_SHARING
		1614	allow_cycles = F_ALLOW_CYCLES
		1615	forbid_objects = F_FORBID_OBJECTS
		1616	pack_strings = F_PACK_STRINGS
		1617	text_keys = F_TEXT_KEYS
		1618	text_strings = F_TEXT_STRINGS
		1619	validate_utf8 = F_VALIDATE_UTF8
1046	PPCODE:	1620	PPCODE:
1047	{	1621	{
1048	if (enable)	1622	if (enable)
1049	self->flags |= ix;	1623	self->flags |= ix;
1050	else	1624	else
…		…
1055		1629
1056	void get_shrink (CBOR *self)	1630	void get_shrink (CBOR *self)
1057	ALIAS:	1631	ALIAS:
1058	get_shrink = F_SHRINK	1632	get_shrink = F_SHRINK
1059	get_allow_unknown = F_ALLOW_UNKNOWN	1633	get_allow_unknown = F_ALLOW_UNKNOWN
		1634	get_allow_sharing = F_ALLOW_SHARING
		1635	get_allow_cycles = F_ALLOW_CYCLES
		1636	get_forbid_objects = F_FORBID_OBJECTS
		1637	get_pack_strings = F_PACK_STRINGS
		1638	get_text_keys = F_TEXT_KEYS
		1639	get_text_strings = F_TEXT_STRINGS
		1640	get_validate_utf8 = F_VALIDATE_UTF8
1060	PPCODE:	1641	PPCODE:
1061	XPUSHs (boolSV (self->flags & ix));	1642	XPUSHs (boolSV (self->flags & ix));
1062		1643
1063	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1644	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1064	PPCODE:	1645	PPCODE:
…		…
1080	CODE:	1661	CODE:
1081	RETVAL = self->max_size;	1662	RETVAL = self->max_size;
1082	OUTPUT:	1663	OUTPUT:
1083	RETVAL	1664	RETVAL
1084		1665
1085	#if 0 //TODO	1666	void filter (CBOR *self, SV *filter = 0)
1086
1087	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1088	PPCODE:	1667	PPCODE:
1089	{
1090	SvREFCNT_dec (self->cb_object);	1668	SvREFCNT_dec (self->filter);
1091	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1669	self->filter = filter ? newSVsv (filter) : filter;
1092
1093	XPUSHs (ST (0));	1670	XPUSHs (ST (0));
1094	}
1095		1671
1096	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1672	SV *get_filter (CBOR *self)
1097	PPCODE:	1673	CODE:
1098	{	1674	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1099	if (!self->cb_sk_object)	1675	OUTPUT:
1100	self->cb_sk_object = newHV ();	1676	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		1677
1120	void encode (CBOR *self, SV *scalar)	1678	void encode (CBOR *self, SV *scalar)
1121	PPCODE:	1679	PPCODE:
1122	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1680	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1123	XPUSHs (scalar);	1681	XPUSHs (scalar);
…		…
1136	EXTEND (SP, 2);	1694	EXTEND (SP, 2);
1137	PUSHs (sv);	1695	PUSHs (sv);
1138	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1696	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1139	}	1697	}
1140		1698
		1699	void incr_parse (CBOR *self, SV *cborstr)
		1700	ALIAS:
		1701	incr_parse_multiple = 1
		1702	PPCODE:
		1703	{
		1704	if (SvUTF8 (cborstr))
		1705	sv_utf8_downgrade (cborstr, 0);
		1706
		1707	if (!self->incr_count)
		1708	{
		1709	self->incr_count = newAV ();
		1710	self->incr_pos = 0;
		1711	self->incr_need = 1;
		1712
		1713	av_push (self->incr_count, newSViv (1));
		1714	}
		1715
		1716	do
		1717	{
		1718	if (!incr_parse (self, cborstr))
		1719	{
		1720	if (self->incr_need > self->max_size && self->max_size)
		1721	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1722	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1723
		1724	break;
		1725	}
		1726
		1727	SV *sv;
		1728	char *offset;
		1729
		1730	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1731	XPUSHs (sv);
		1732
		1733	sv_chop (cborstr, offset);
		1734
		1735	av_clear (self->incr_count);
		1736	av_push (self->incr_count, newSViv (1));
		1737
		1738	self->incr_pos = 0;
		1739	self->incr_need = self->incr_pos + 1;
		1740	}
		1741	while (ix);
		1742	}
		1743
		1744	void incr_reset (CBOR *self)
		1745	CODE:
		1746	{
		1747	SvREFCNT_dec (self->incr_count);
		1748	self->incr_count = 0;
		1749	}
		1750
1141	void DESTROY (CBOR *self)	1751	void DESTROY (CBOR *self)
1142	CODE:	1752	PPCODE:
1143	SvREFCNT_dec (self->cb_sk_object);	1753	cbor_free (self);
1144	SvREFCNT_dec (self->cb_object);
1145		1754
1146	PROTOTYPES: ENABLE	1755	PROTOTYPES: ENABLE
1147		1756
1148	void encode_cbor (SV *scalar)	1757	void encode_cbor (SV *scalar)
		1758	ALIAS:
		1759	encode_cbor = 0
		1760	encode_cbor_sharing = F_ALLOW_SHARING
1149	PPCODE:	1761	PPCODE:
1150	{	1762	{
1151	CBOR cbor;	1763	CBOR cbor;
1152	cbor_init (&cbor);	1764	cbor_init (&cbor);
		1765	cbor.flags |= ix;
1153	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1766	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1154	XPUSHs (scalar);	1767	XPUSHs (scalar);
1155	}	1768	}
1156		1769
1157	void decode_cbor (SV *cborstr)	1770	void decode_cbor (SV *cborstr)
…		…
1161	cbor_init (&cbor);	1774	cbor_init (&cbor);
1162	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1775	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1163	XPUSHs (cborstr);	1776	XPUSHs (cborstr);
1164	}	1777	}
1165		1778
		1779	#ifdef __AFL_COMPILER
		1780
		1781	void
		1782	afl_init ()
		1783	CODE:
		1784	__AFL_INIT ();
		1785
		1786	int
		1787	afl_loop (unsigned int count = 10000)
		1788	CODE:
		1789	RETVAL = __AFL_LOOP (count);
		1790	OUTPUT:
		1791	RETVAL
		1792
		1793	#endif
		1794

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines