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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.5 by root, Sat Oct 26 21:14:20 2013 UTC vs.
Revision 1.70 by root, Fri Dec 4 02:57:14 2020 UTC

…		…
6	#include <string.h>	6	#include <string.h>
7	#include <stdlib.h>	7	#include <stdlib.h>
8	#include <stdio.h>	8	#include <stdio.h>
9	#include <limits.h>	9	#include <limits.h>
10	#include <float.h>	10	#include <float.h>
		11	#include <inttypes.h>
11		12
		13	#define ECB_NO_THREADS 1
12	#include "ecb.h"	14	#include "ecb.h"
13		15
		16	// compatibility with perl <5.18
		17	#ifndef HvNAMELEN_get
		18	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		19	#endif
		20	#ifndef HvNAMELEN
		21	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		22	#endif
		23	#ifndef HvNAMEUTF8
		24	# define HvNAMEUTF8(hv) 0
		25	#endif
		26	#ifndef SvREFCNT_inc_NN
		27	# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
		28	#endif
		29	#ifndef SvREFCNT_dec_NN
		30	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		31	#endif
		32
		33	// known major and minor types
		34	enum cbor_type
		35	{
		36	MAJOR_SHIFT = 5,
		37	MINOR_MASK = 0x1f,
		38
		39	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		40	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		41	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		42	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		43	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		44	MAJOR_MAP = 5 << MAJOR_SHIFT,
		45	MAJOR_TAG = 6 << MAJOR_SHIFT,
		46	MAJOR_MISC = 7 << MAJOR_SHIFT,
		47
		48	// INT/STRING/ARRAY/MAP subtypes
		49	LENGTH_EXT1 = 24,
		50	LENGTH_EXT2 = 25,
		51	LENGTH_EXT4 = 26,
		52	LENGTH_EXT8 = 27,
		53
		54	// SIMPLE types (effectively MISC subtypes)
		55	SIMPLE_FALSE = 20,
		56	SIMPLE_TRUE = 21,
		57	SIMPLE_NULL = 22,
		58	SIMPLE_UNDEF = 23,
		59
		60	// MISC subtype (unused)
		61	MISC_EXT1 = 24,
		62	MISC_FLOAT16 = 25,
		63	MISC_FLOAT32 = 26,
		64	MISC_FLOAT64 = 27,
		65
		66	// BYTES/TEXT/ARRAY/MAP
		67	MINOR_INDEF = 31,
		68	};
		69
		70	// known tags
		71	enum cbor_tag
		72	{
		73	// extensions
		74	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
		75	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
		76	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
		77	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
		78	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
		79	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
		80	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
		81
		82	// rfc7049
		83	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
		84	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
		85	CBOR_TAG_POS_BIGNUM = 2, // byte string
		86	CBOR_TAG_NEG_BIGNUM = 3, // byte string
		87	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
		88	CBOR_TAG_BIGFLOAT = 5, // array
		89
		90	CBOR_TAG_CONV_B64U = 21, // base64url, any
		91	CBOR_TAG_CONV_B64 = 22, // base64, any
		92	CBOR_TAG_CONV_HEX = 23, // base16, any
		93	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
		94
		95	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
		96	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
		97	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
		98	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
		99	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
		100
		101	CBOR_TAG_MAGIC = 55799, // self-describe cbor
		102	};
		103
		104	// known forced types, also hardcoded in CBOR.pm
		105	enum
		106	{
		107	AS_CBOR = 0,
		108	AS_INT = 1,
		109	AS_BYTES = 2,
		110	AS_TEXT = 3,
		111	AS_FLOAT16 = 4,
		112	AS_FLOAT32 = 5,
		113	AS_FLOAT64 = 6,
		114	AS_MAP = 7,
		115	// possibly future enhancements: (generic) float, (generic) string
		116	};
		117
14	#define F_SHRINK 0x00000200UL	118	#define F_SHRINK 0x00000001UL
15	#define F_ALLOW_UNKNOWN 0x00002000UL	119	#define F_ALLOW_UNKNOWN 0x00000002UL
		120	#define F_ALLOW_SHARING 0x00000004UL
		121	#define F_ALLOW_CYCLES 0x00000008UL
		122	#define F_FORBID_OBJECTS 0x00000010UL
		123	#define F_PACK_STRINGS 0x00000020UL
		124	#define F_TEXT_KEYS 0x00000040UL
		125	#define F_TEXT_STRINGS 0x00000080UL
		126	#define F_VALIDATE_UTF8 0x00000100UL
16		127
17	#define INIT_SIZE 32 // initial scalar size to be allocated	128	#define INIT_SIZE 32 // initial scalar size to be allocated
18		129
19	#define SB do {	130	#define SB do {
20	#define SE } while (0)	131	#define SE } while (0)
…		…
31	#else	142	#else
32	# define CBOR_SLOW 0	143	# define CBOR_SLOW 0
33	# define CBOR_STASH cbor_stash	144	# define CBOR_STASH cbor_stash
34	#endif	145	#endif
35		146
36	static HV *cbor_stash, *cbor_boolean_stash; // CBOR::XS::	147	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
37	static SV *cbor_true, *cbor_false;	148	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
38		149
39	typedef struct {	150	typedef struct {
40	U32 flags;	151	U32 flags;
41	U32 max_depth;	152	U32 max_depth;
42	STRLEN max_size;	153	STRLEN max_size;
		154	SV *filter;
43		155
44	SV *cb_object;	156	// for the incremental parser
45	HV *cb_sk_object;	157	STRLEN incr_pos; // the current offset into the text
		158	STRLEN incr_need; // minimum bytes needed to decode
		159	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
46	} CBOR;	160	} CBOR;
47		161
48	ecb_inline void	162	ecb_inline void
49	cbor_init (CBOR *cbor)	163	cbor_init (CBOR *cbor)
50	{	164	{
51	Zero (cbor, 1, CBOR);	165	Zero (cbor, 1, CBOR);
52	cbor->max_depth = 512;	166	cbor->max_depth = 512;
		167	}
		168
		169	ecb_inline void
		170	cbor_free (CBOR *cbor)
		171	{
		172	SvREFCNT_dec (cbor->filter);
		173	SvREFCNT_dec (cbor->incr_count);
53	}	174	}
54		175
55	/////////////////////////////////////////////////////////////////////////////	176	/////////////////////////////////////////////////////////////////////////////
56	// utility functions	177	// utility functions
57		178
…		…
79	SvPV_renew (sv, SvCUR (sv) + 1);	200	SvPV_renew (sv, SvCUR (sv) + 1);
80	#endif	201	#endif
81	}	202	}
82	}	203	}
83		204
84	/////////////////////////////////////////////////////////////////////////////	205	// minimum length of a string to be registered for stringref
85	// fp hell	206	ecb_inline int
86		207	minimum_string_length (UV idx)
87	//TODO	208	{
		209	return idx <= 23 ? 3
		210	: idx <= 0xffU ? 4
		211	: idx <= 0xffffU ? 5
		212	: idx <= 0xffffffffU ? 7
		213	: 11;
		214	}
88		215
89	/////////////////////////////////////////////////////////////////////////////	216	/////////////////////////////////////////////////////////////////////////////
90	// encoder	217	// encoder
91		218
92	// structure used for encoding CBOR	219	// structure used for encoding CBOR
…		…
95	char *cur; // SvPVX (sv) + current output position	222	char *cur; // SvPVX (sv) + current output position
96	char *end; // SvEND (sv)	223	char *end; // SvEND (sv)
97	SV *sv; // result scalar	224	SV *sv; // result scalar
98	CBOR cbor;	225	CBOR cbor;
99	U32 depth; // recursion level	226	U32 depth; // recursion level
		227	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		228	UV stringref_idx;
		229	HV *shareable; // ptr => index, or 0
		230	UV shareable_idx;
100	} enc_t;	231	} enc_t;
101		232
102	ecb_inline void	233	ecb_inline void
103	need (enc_t *enc, STRLEN len)	234	need (enc_t *enc, STRLEN len)
104	{	235	{
105	if (ecb_expect_false (enc->cur + len >= enc->end))	236	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
106	{	237	{
107	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	238	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
108	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	239	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
109	enc->cur = SvPVX (enc->sv) + cur;	240	enc->cur = SvPVX (enc->sv) + cur;
110	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	241	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
111	}	242	}
112	}	243	}
113		244
		245	static void encode_sv (enc_t *enc, SV *sv);
		246
114	ecb_inline void	247	ecb_inline void
115	encode_ch (enc_t *enc, char ch)	248	encode_ch (enc_t *enc, char ch)
116	{	249	{
117	need (enc, 1);	250	need (enc, 1);
118	*enc->cur++ = ch;	251	*enc->cur++ = ch;
119	}	252	}
120		253
		254	// used for tags, intregers, element counts and so on
121	static void	255	static void
122	encode_uint (enc_t *enc, int major, UV len)	256	encode_uint (enc_t *enc, int major, UV len)
123	{	257	{
124	need (enc, 9);	258	need (enc, 9);
125		259
126	if (len < 24)	260	if (ecb_expect_true (len < LENGTH_EXT1))
127	*enc->cur++ = major | len;	261	*enc->cur++ = major | len;
128	else if (len <= 0xff)	262	else if (ecb_expect_true (len <= 0xffU))
129	{	263	{
130	*enc->cur++ = major | 24;	264	*enc->cur++ = major | LENGTH_EXT1;
131	*enc->cur++ = len;	265	*enc->cur++ = len;
132	}	266	}
133	else if (len <= 0xffff)	267	else if (len <= 0xffffU)
134	{	268	{
135	*enc->cur++ = major | 25;	269	*enc->cur++ = major | LENGTH_EXT2;
136	*enc->cur++ = len >> 8;	270	*enc->cur++ = len >> 8;
137	*enc->cur++ = len;	271	*enc->cur++ = len;
138	}	272	}
139	else if (len <= 0xffffffff)	273	else if (len <= 0xffffffffU)
140	{	274	{
141	*enc->cur++ = major | 26;	275	*enc->cur++ = major | LENGTH_EXT4;
142	*enc->cur++ = len >> 24;	276	*enc->cur++ = len >> 24;
143	*enc->cur++ = len >> 16;	277	*enc->cur++ = len >> 16;
144	*enc->cur++ = len >> 8;	278	*enc->cur++ = len >> 8;
145	*enc->cur++ = len;	279	*enc->cur++ = len;
146	}	280	}
147	else	281	else
148	{	282	{
149	*enc->cur++ = major | 27;	283	*enc->cur++ = major | LENGTH_EXT8;
150	*enc->cur++ = len >> 56;	284	*enc->cur++ = len >> 56;
151	*enc->cur++ = len >> 48;	285	*enc->cur++ = len >> 48;
152	*enc->cur++ = len >> 40;	286	*enc->cur++ = len >> 40;
153	*enc->cur++ = len >> 32;	287	*enc->cur++ = len >> 32;
154	*enc->cur++ = len >> 24;	288	*enc->cur++ = len >> 24;
…		…
156	*enc->cur++ = len >> 8;	290	*enc->cur++ = len >> 8;
157	*enc->cur++ = len;	291	*enc->cur++ = len;
158	}	292	}
159	}	293	}
160		294
161	static void	295	// encodes a perl value into a CBOR integer
		296	ecb_inline void
		297	encode_int (enc_t *enc, SV *sv)
		298	{
		299	if (SvIsUV (sv))
		300	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
		301	else if (SvIVX (sv) >= 0)
		302	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
		303	else
		304	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
		305	}
		306
		307	ecb_inline void
		308	encode_tag (enc_t *enc, UV tag)
		309	{
		310	encode_uint (enc, MAJOR_TAG, tag);
		311	}
		312
		313	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		314	ecb_noinline static void
162	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	315	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
163	{	316	{
164	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	317	STRLEN ulen = len;
		318	U8 *p, *pend = (U8 *)str + len;
		319
		320	for (p = (U8 *)str; p < pend; ++p)
		321	ulen += *p >> 7; // count set high bits
		322
		323	encode_uint (enc, MAJOR_TEXT, ulen);
		324
		325	need (enc, ulen);
		326	for (p = (U8 *)str; p < pend; ++p)
		327	if (*p < 0x80)
		328	*enc->cur++ = *p;
		329	else
		330	{
		331	*enc->cur++ = 0xc0 + (*p >> 6);
		332	*enc->cur++ = 0x80 + (*p & 63);
		333	}
		334	}
		335
		336	ecb_inline void
		337	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		338	{
		339	if (ecb_expect_false (upgrade_utf8))
		340	if (!utf8)
		341	{
		342	encode_str_utf8 (enc, utf8, str, len);
		343	return;
		344	}
		345
		346	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
165	need (enc, len);	347	need (enc, len);
166	memcpy (enc->cur, str, len);	348	memcpy (enc->cur, str, len);
167	enc->cur += len;	349	enc->cur += len;
168	}	350	}
169		351
170	static void encode_sv (enc_t *enc, SV *sv);	352	ecb_inline void
		353	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		354	{
		355	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		356	{
		357	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		358
		359	if (SvOK (*svp))
		360	{
		361	// already registered, use stringref
		362	encode_tag (enc, CBOR_TAG_STRINGREF);
		363	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		364	return;
		365	}
		366	else if (len >= minimum_string_length (enc->stringref_idx))
		367	{
		368	// register only
		369	sv_setuv (*svp, enc->stringref_idx);
		370	++enc->stringref_idx;
		371	}
		372	}
		373
		374	encode_str (enc, upgrade_utf8, utf8, str, len);
		375	}
		376
		377	ecb_inline void
		378	encode_float16 (enc_t *enc, NV nv)
		379	{
		380	need (enc, 1+2);
		381
		382	*enc->cur++ = MAJOR_MISC | MISC_FLOAT16;
		383
		384	uint16_t fp = ecb_float_to_binary16 (nv);
		385
		386	if (!ecb_big_endian ())
		387	fp = ecb_bswap16 (fp);
		388
		389	memcpy (enc->cur, &fp, 2);
		390	enc->cur += 2;
		391	}
		392
		393	ecb_inline void
		394	encode_float32 (enc_t *enc, NV nv)
		395	{
		396	need (enc, 1+4);
		397
		398	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
		399
		400	uint32_t fp = ecb_float_to_binary32 (nv);
		401
		402	if (!ecb_big_endian ())
		403	fp = ecb_bswap32 (fp);
		404
		405	memcpy (enc->cur, &fp, 4);
		406	enc->cur += 4;
		407	}
		408
		409	ecb_inline void
		410	encode_float64 (enc_t *enc, NV nv)
		411	{
		412	need (enc, 1+8);
		413
		414	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
		415
		416	uint64_t fp = ecb_double_to_binary64 (nv);
		417
		418	if (!ecb_big_endian ())
		419	fp = ecb_bswap64 (fp);
		420
		421	memcpy (enc->cur, &fp, 8);
		422	enc->cur += 8;
		423	}
		424
		425	ecb_inline void
		426	encode_bool (enc_t *enc, int istrue)
		427	{
		428	encode_ch (enc, istrue ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		429	}
		430
		431	// encodes an arrayref containing key-value pairs as CBOR map
		432	ecb_inline void
		433	encode_array_as_map (enc_t *enc, SV *sv)
		434	{
		435	if (enc->depth >= enc->cbor.max_depth)
		436	croak (ERR_NESTING_EXCEEDED);
		437
		438	++enc->depth;
		439
		440	// as_map does error checking for us, but we re-check in case
		441	// things have changed.
		442
		443	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		444	croak ("CBOR::XS::as_map requires an array reference (did you change the array after calling as_map?)");
		445
		446	AV *av = (AV *)SvRV (sv);
		447	int i, len = av_len (av);
		448
		449	if (!(len & 1))
		450	croak ("CBOR::XS::as_map requires an even number of elements (did you change the array after calling as_map?)");
		451
		452	encode_uint (enc, MAJOR_MAP, (len + 1) >> 1);
		453
		454	for (i = 0; i <= len; ++i)
		455	{
		456	SV **svp = av_fetch (av, i, 0);
		457	encode_sv (enc, svp ? *svp : &PL_sv_undef);
		458	}
		459
		460	--enc->depth;
		461	}
		462
		463	ecb_inline void
		464	encode_forced (enc_t *enc, UV type, SV *sv)
		465	{
		466	switch (type)
		467	{
		468	case AS_CBOR:
		469	{
		470	STRLEN len;
		471	char *str = SvPVbyte (sv, len);
		472
		473	need (enc, len);
		474	memcpy (enc->cur, str, len);
		475	enc->cur += len;
		476	}
		477	break;
		478
		479	case AS_BYTES:
		480	{
		481	STRLEN len;
		482	char *str = SvPVbyte (sv, len);
		483	encode_strref (enc, 0, 0, str, len);
		484	}
		485	break;
		486
		487	case AS_TEXT:
		488	{
		489	STRLEN len;
		490	char *str = SvPVutf8 (sv, len);
		491	encode_strref (enc, 1, 1, str, len);
		492	}
		493	break;
		494
		495	case AS_INT: encode_int (enc, sv); break;
		496
		497	case AS_FLOAT16: encode_float16 (enc, SvNV (sv)); break;
		498	case AS_FLOAT32: encode_float32 (enc, SvNV (sv)); break;
		499	case AS_FLOAT64: encode_float64 (enc, SvNV (sv)); break;
		500
		501	case AS_MAP: encode_array_as_map (enc, sv); break;
		502
		503	default:
		504	croak ("encountered malformed CBOR::XS::Tagged object");
		505	}
		506	}
171		507
172	static void	508	static void
173	encode_av (enc_t *enc, AV *av)	509	encode_av (enc_t *enc, AV *av)
174	{	510	{
175	int i, len = av_len (av);	511	int i, len = av_len (av);
…		…
177	if (enc->depth >= enc->cbor.max_depth)	513	if (enc->depth >= enc->cbor.max_depth)
178	croak (ERR_NESTING_EXCEEDED);	514	croak (ERR_NESTING_EXCEEDED);
179		515
180	++enc->depth;	516	++enc->depth;
181		517
182	encode_uint (enc, 0x80, len + 1);	518	encode_uint (enc, MAJOR_ARRAY, len + 1);
183		519
		520	if (ecb_expect_false (SvMAGICAL (av)))
184	for (i = 0; i <= len; ++i)	521	for (i = 0; i <= len; ++i)
185	{	522	{
186	SV **svp = av_fetch (av, i, 0);	523	SV **svp = av_fetch (av, i, 0);
187	encode_sv (enc, svp ? *svp : &PL_sv_undef);	524	encode_sv (enc, svp ? *svp : &PL_sv_undef);
188	}	525	}
		526	else
		527	for (i = 0; i <= len; ++i)
		528	{
		529	SV *sv = AvARRAY (av)[i];
		530	encode_sv (enc, sv ? sv : &PL_sv_undef);
		531	}
189		532
190	--enc->depth;	533	--enc->depth;
191	}	534	}
192		535
193	static void	536	static void
…		…
201	++enc->depth;	544	++enc->depth;
202		545
203	int pairs = hv_iterinit (hv);	546	int pairs = hv_iterinit (hv);
204	int mg = SvMAGICAL (hv);	547	int mg = SvMAGICAL (hv);
205		548
206	if (mg)	549	if (ecb_expect_false (mg))
207	encode_ch (enc, 0xa0 | 31);	550	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
208	else	551	else
209	encode_uint (enc, 0xa0, pairs);	552	encode_uint (enc, MAJOR_MAP, pairs);
210		553
211	while ((he = hv_iternext (hv)))	554	while ((he = hv_iternext (hv)))
212	{	555	{
213	if (HeKLEN (he) == HEf_SVKEY)	556	if (HeKLEN (he) == HEf_SVKEY)
214	encode_sv (enc, HeSVKEY (he));	557	encode_sv (enc, HeSVKEY (he));
215	else	558	else
216	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	559	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
217		560
218	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	561	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
219	}	562	}
220		563
221	if (mg)	564	if (ecb_expect_false (mg))
222	encode_ch (enc, 0xe0 | 31);	565	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
223		566
224	--enc->depth;	567	--enc->depth;
225	}	568	}
226		569
227	// encode objects, arrays and special \0=false and \1=true values.	570	// encode objects, arrays and special \0=false and \1=true values.
228	static void	571	static void
229	encode_rv (enc_t *enc, SV *sv)	572	encode_rv (enc_t *enc, SV *sv)
230	{	573	{
231	svtype svt;
232
233	SvGETMAGIC (sv);	574	SvGETMAGIC (sv);
		575
234	svt = SvTYPE (sv);	576	svtype svt = SvTYPE (sv);
235		577
236	if (ecb_expect_false (SvOBJECT (sv)))	578	if (ecb_expect_false (SvOBJECT (sv)))
237	{	579	{
238	HV *stash = !CBOR_SLOW || cbor_boolean_stash	580	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
239	? cbor_boolean_stash	581	? types_boolean_stash
		582	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		583	HV *error_stash = !CBOR_SLOW || types_error_stash
		584	? types_error_stash
		585	: gv_stashpv ("Types::Serialiser::Error", 1);
		586	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		587	? cbor_tagged_stash
240	: gv_stashpv ("CBOR::XS::Boolean", 1);	588	: gv_stashpv ("CBOR::XS::Tagged" , 1);
241		589
242	if (SvSTASH (sv) == stash)	590	HV *stash = SvSTASH (sv);
243	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	591
		592	if (stash == boolean_stash)
		593	{
		594	encode_bool (enc, SvIV (sv));
		595	return;
		596	}
		597	else if (stash == error_stash)
		598	{
		599	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		600	return;
		601	}
		602	else if (stash == tagged_stash)
		603	{
		604	if (svt != SVt_PVAV)
		605	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		606
		607	switch (av_len ((AV *)sv))
		608	{
		609	case 2-1:
		610	// actually a tagged value
		611	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
		612	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		613	break;
		614
		615	case 3-1:
		616	// a forced type [value, type, undef]
		617	encode_forced (enc, SvUV (*av_fetch ((AV *)sv, 1, 1)), *av_fetch ((AV *)sv, 0, 1));
		618	break;
		619
		620	default:
		621	croak ("encountered malformed CBOR::XS::Tagged object");
		622	}
		623
		624	return;
		625	}
		626	}
		627
		628	if (ecb_expect_false (SvREFCNT (sv) > 1)
		629	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		630	{
		631	if (ecb_expect_false (!enc->shareable))
		632	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		633
		634	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		635
		636	if (SvOK (*svp))
		637	{
		638	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		639	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		640	return;
		641	}
244	else	642	else
245	{	643	{
246	#if 0 //TODO	644	sv_setuv (*svp, enc->shareable_idx);
247	if (enc->cbor.flags & F_CONV_BLESSED)	645	++enc->shareable_idx;
		646	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		647	}
		648	}
		649
		650	if (ecb_expect_false (SvOBJECT (sv)))
		651	{
		652	HV *stash = SvSTASH (sv);
		653	GV *method;
		654
		655	if (enc->cbor.flags & F_FORBID_OBJECTS)
		656	croak ("encountered object '%s', but forbid_objects is enabled",
		657	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		658	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
248	{	659	{
		660	dSP;
		661
		662	ENTER; SAVETMPS;
		663	PUSHMARK (SP);
249	// we re-bless the reference to get overload and other niceties right	664	// we re-bless the reference to get overload and other niceties right
250	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
251
252	if (to_cbor)
253	{
254	dSP;
255
256	ENTER; SAVETMPS; PUSHMARK (SP);
257	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	665	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
258		666
259	// calling with G_SCALAR ensures that we always get a 1 return value
260	PUTBACK;	667	PUTBACK;
		668	// G_SCALAR ensures that return value is 1
261	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	669	call_sv ((SV *)GvCV (method), G_SCALAR);
262	SPAGAIN;	670	SPAGAIN;
263		671
264	// catch this surprisingly common error	672	// catch this surprisingly common error
265	if (SvROK (TOPs) && SvRV (TOPs) == sv)	673	if (SvROK (TOPs) && SvRV (TOPs) == sv)
266	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	674	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
267		675
268	sv = POPs;
269	PUTBACK;
270
271	encode_sv (enc, sv);	676	encode_sv (enc, POPs);
272		677
		678	PUTBACK;
		679
273	FREETMPS; LEAVE;	680	FREETMPS; LEAVE;
274	}	681	}
275	else if (enc->cbor.flags & F_ALLOW_BLESSED)	682	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
276	encode_str (enc, "null", 4, 0);	683	{
277	else	684	dSP;
278	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it",	685
279	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	686	ENTER; SAVETMPS;
		687	PUSHMARK (SP);
		688	EXTEND (SP, 2);
		689	// we re-bless the reference to get overload and other niceties right
		690	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		691	PUSHs (sv_cbor);
		692
		693	PUTBACK;
		694	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		695	SPAGAIN;
		696
		697	// catch this surprisingly common error
		698	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		699	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		700
		701	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		702	encode_uint (enc, MAJOR_ARRAY, count + 1);
		703	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		704
		705	{
		706	int i;
		707
		708	for (i = 0; i < count; ++i)
		709	encode_sv (enc, SP[i + 1 - count]);
		710
		711	SP -= count;
280	}	712	}
281	else if (enc->cbor.flags & F_ALLOW_BLESSED)	713
282	encode_str (enc, "null", 4, 0);	714	PUTBACK;
		715
		716	FREETMPS; LEAVE;
		717	}
283	else	718	else
284	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	719	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
285	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	720	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
286	#endif
287	}
288	}	721	}
289	else if (svt == SVt_PVHV)	722	else if (svt == SVt_PVHV)
290	encode_hv (enc, (HV *)sv);	723	encode_hv (enc, (HV *)sv);
291	else if (svt == SVt_PVAV)	724	else if (svt == SVt_PVAV)
292	encode_av (enc, (AV *)sv);	725	encode_av (enc, (AV *)sv);
293	else if (svt < SVt_PVAV)
294	{
295	STRLEN len = 0;
296	char *pv = svt ? SvPV (sv, len) : 0;
297
298	if (len == 1 && *pv == '1')
299	encode_ch (enc, 0xe0 | 21);
300	else if (len == 1 && *pv == '0')
301	encode_ch (enc, 0xe0 | 20);
302	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
303	encode_ch (enc, 0xe0 | 23);
304	else
305	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
306	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
307	}
308	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
309	encode_ch (enc, 0xe0 | 23);
310	else	726	else
311	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	727	{
312	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	728	encode_tag (enc, CBOR_TAG_INDIRECTION);
		729	encode_sv (enc, sv);
		730	}
313	}	731	}
314		732
315	static void	733	static void
316	encode_nv (enc_t *enc, SV *sv)	734	encode_nv (enc_t *enc, SV *sv)
317	{	735	{
318	double nv = SvNVX (sv);	736	double nv = SvNVX (sv);
319		737
320	need (enc, 9);	738	need (enc, 9);
321		739
322	if (ecb_expect_false (nv == (U32)nv))	740	if (ecb_expect_false (nv == (NV)(U32)nv))
323	encode_uint (enc, 0x00, (U32)nv);	741	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
324	//TODO: maybe I32?	742	//TODO: maybe I32?
325	else if (ecb_expect_false (nv == (float)nv))	743	else if (ecb_expect_false (nv == (float)nv))
326	{	744	encode_float32 (enc, nv);
327	uint32_t fp = ecb_float_to_binary32 (nv);
328
329	*enc->cur++ = 0xe0 | 26;
330
331	if (!ecb_big_endian ())
332	fp = ecb_bswap32 (fp);
333
334	memcpy (enc->cur, &fp, 4);
335	enc->cur += 4;
336	}
337	else	745	else
338	{	746	encode_float64 (enc, nv);
339	uint64_t fp = ecb_double_to_binary64 (nv);
340
341	*enc->cur++ = 0xe0 | 27;
342
343	if (!ecb_big_endian ())
344	fp = ecb_bswap64 (fp);
345
346	memcpy (enc->cur, &fp, 8);
347	enc->cur += 8;
348	}
349	}	747	}
350		748
351	static void	749	static void
352	encode_sv (enc_t *enc, SV *sv)	750	encode_sv (enc_t *enc, SV *sv)
353	{	751	{
…		…
355		753
356	if (SvPOKp (sv))	754	if (SvPOKp (sv))
357	{	755	{
358	STRLEN len;	756	STRLEN len;
359	char *str = SvPV (sv, len);	757	char *str = SvPV (sv, len);
360	encode_str (enc, SvUTF8 (sv), str, len);	758	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
361	}	759	}
362	else if (SvNOKp (sv))	760	else if (SvNOKp (sv))
363	encode_nv (enc, sv);	761	encode_nv (enc, sv);
364	else if (SvIOKp (sv))	762	else if (SvIOKp (sv))
365	{	763	encode_int (enc, sv);
366	if (SvIsUV (sv))
367	encode_uint (enc, 0x00, SvUVX (sv));
368	else if (SvIVX (sv) >= 0)
369	encode_uint (enc, 0x00, SvIVX (sv));
370	else
371	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
372	}
373	else if (SvROK (sv))	764	else if (SvROK (sv))
374	encode_rv (enc, SvRV (sv));	765	encode_rv (enc, SvRV (sv));
375	else if (!SvOK (sv))	766	else if (!SvOK (sv))
376	encode_ch (enc, 0xe0 | 22);	767	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
377	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	768	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
378	encode_ch (enc, 0xe0 | 23);	769	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
379	else	770	else
380	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	771	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
381	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	772	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
382	}	773	}
383		774
384	static SV *	775	static SV *
385	encode_cbor (SV *scalar, CBOR *cbor)	776	encode_cbor (SV *scalar, CBOR *cbor)
386	{	777	{
387	enc_t enc;	778	enc_t enc = { 0 };
388		779
389	enc.cbor = *cbor;	780	enc.cbor = *cbor;
390	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	781	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
391	enc.cur = SvPVX (enc.sv);	782	enc.cur = SvPVX (enc.sv);
392	enc.end = SvEND (enc.sv);	783	enc.end = SvEND (enc.sv);
393	enc.depth = 0;
394		784
395	SvPOK_only (enc.sv);	785	SvPOK_only (enc.sv);
		786
		787	if (cbor->flags & F_PACK_STRINGS)
		788	{
		789	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		790	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		791	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		792	}
		793
396	encode_sv (&enc, scalar);	794	encode_sv (&enc, scalar);
397		795
398	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	796	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
399	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	797	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
400		798
…		…
414	U8 *end; // end of input string	812	U8 *end; // end of input string
415	const char *err; // parse error, if != 0	813	const char *err; // parse error, if != 0
416	CBOR cbor;	814	CBOR cbor;
417	U32 depth; // recursion depth	815	U32 depth; // recursion depth
418	U32 maxdepth; // recursion depth limit	816	U32 maxdepth; // recursion depth limit
		817	AV *shareable;
		818	AV *stringref;
		819	SV *decode_tagged;
		820	SV *err_sv; // optional sv for error, needs to be freed
419	} dec_t;	821	} dec_t;
420		822
421	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	823	// set dec->err to ERRSV
		824	ecb_cold static void
		825	err_errsv (dec_t *dec)
		826	{
		827	if (!dec->err)
		828	{
		829	dec->err_sv = newSVsv (ERRSV);
422		830
423	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	831	// chop off the trailing \n
		832	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		833	*SvEND (dec->err_sv) = 0;
424		834
		835	dec->err = SvPVutf8_nolen (dec->err_sv);
		836	}
		837	}
		838
		839	// the following functions are used to reduce code size and help the compiler to optimise
		840	ecb_cold static void
		841	err_set (dec_t *dec, const char *reason)
		842	{
		843	if (!dec->err)
		844	dec->err = reason;
		845	}
		846
		847	ecb_cold static void
		848	err_unexpected_end (dec_t *dec)
		849	{
		850	err_set (dec, "unexpected end of CBOR data");
		851	}
		852
		853	#define ERR_DO(do) SB do; goto fail; SE
		854	#define ERR(reason) ERR_DO (err_set (dec, reason))
		855	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		856
		857	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		858
425	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	859	#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED)
426	#define DEC_DEC_DEPTH --dec->depth	860	#define DEC_DEC_DEPTH --dec->depth
427		861
428	static UV	862	static UV
429	decode_uint (dec_t *dec)	863	decode_uint (dec_t *dec)
430	{	864	{
431	switch (*dec->cur & 31)	865	U8 m = *dec->cur & MINOR_MASK;
432	{	866	++dec->cur;
433	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
434	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
435	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
436	return *dec->cur++ & 31;
437		867
438	case 24:	868	if (ecb_expect_true (m < LENGTH_EXT1))
		869	return m;
		870	else if (ecb_expect_true (m == LENGTH_EXT1))
		871	{
439	WANT (2);	872	WANT (1);
440	dec->cur += 2;	873	dec->cur += 1;
441	return dec->cur[-1];	874	return dec->cur[-1];
442		875	}
443	case 25:	876	else if (ecb_expect_true (m == LENGTH_EXT2))
		877	{
444	WANT (3);	878	WANT (2);
445	dec->cur += 3;	879	dec->cur += 2;
446	return (((UV)dec->cur[-2]) << 8)	880	return (((UV)dec->cur[-2]) << 8)
447	| ((UV)dec->cur[-1]);	881	| ((UV)dec->cur[-1]);
448		882	}
449	case 26:	883	else if (ecb_expect_true (m == LENGTH_EXT4))
		884	{
450	WANT (5);	885	WANT (4);
451	dec->cur += 5;	886	dec->cur += 4;
452	return (((UV)dec->cur[-4]) << 24)	887	return (((UV)dec->cur[-4]) << 24)
453	| (((UV)dec->cur[-3]) << 16)	888	| (((UV)dec->cur[-3]) << 16)
454	| (((UV)dec->cur[-2]) << 8)	889	| (((UV)dec->cur[-2]) << 8)
455	| ((UV)dec->cur[-1]);	890	| ((UV)dec->cur[-1]);
456		891	}
457	case 27:	892	else if (ecb_expect_true (m == LENGTH_EXT8))
		893	{
458	WANT (9);	894	WANT (8);
459	dec->cur += 9;	895	dec->cur += 8;
		896
		897	return
		898	#if UVSIZE < 8
		899	0
		900	#else
460	return (((UV)dec->cur[-8]) << 56)	901	(((UV)dec->cur[-8]) << 56)
461	| (((UV)dec->cur[-7]) << 48)	902	| (((UV)dec->cur[-7]) << 48)
462	| (((UV)dec->cur[-6]) << 40)	903	| (((UV)dec->cur[-6]) << 40)
463	| (((UV)dec->cur[-5]) << 32)	904	| (((UV)dec->cur[-5]) << 32)
		905	#endif
464	| (((UV)dec->cur[-4]) << 24)	906	| (((UV)dec->cur[-4]) << 24)
465	| (((UV)dec->cur[-3]) << 16)	907	| (((UV)dec->cur[-3]) << 16)
466	| (((UV)dec->cur[-2]) << 8)	908	| (((UV)dec->cur[-2]) << 8)
467	| ((UV)dec->cur[-1]);	909	| ((UV)dec->cur[-1]);
468		910	}
469	default:	911	else
470	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	912	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
471	}
472		913
473	fail:	914	fail:
474	return 0;	915	return 0;
475	}	916	}
476		917
…		…
481	{	922	{
482	AV *av = newAV ();	923	AV *av = newAV ();
483		924
484	DEC_INC_DEPTH;	925	DEC_INC_DEPTH;
485		926
486	if ((*dec->cur & 31) == 31)	927	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
487	{	928	{
488	++dec->cur;	929	++dec->cur;
489		930
490	for (;;)	931	for (;;)
491	{	932	{
492	WANT (1);	933	WANT (1);
493		934
494	if (*dec->cur == (0xe0 | 31))	935	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
495	{	936	{
496	++dec->cur;	937	++dec->cur;
497	break;	938	break;
498	}	939	}
499		940
500	av_push (av, decode_sv (dec));	941	av_push (av, decode_sv (dec));
501	}	942	}
502	}	943	}
503	else	944	else
504	{	945	{
505	int i, len = decode_uint (dec);	946	UV i, len = decode_uint (dec);
506		947
		948	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
507	av_fill (av, len - 1);	949	av_fill (av, len - 1);
508		950
509	for (i = 0; i < len; ++i)	951	for (i = 0; i < len; ++i)
510	AvARRAY (av)[i] = decode_sv (dec);	952	AvARRAY (av)[i] = decode_sv (dec);
511	}	953	}
512		954
513	DEC_DEC_DEPTH;	955	DEC_DEC_DEPTH;
514	return newRV_noinc ((SV *)av);	956	return newRV_noinc ((SV *)av);
515		957
516	fail:	958	fail:
517	SvREFCNT_dec (av);	959	SvREFCNT_dec_NN (av);
518	DEC_DEC_DEPTH;	960	DEC_DEC_DEPTH;
519	return &PL_sv_undef;	961	return &PL_sv_undef;
520	}	962	}
521		963
		964	static void
		965	decode_he (dec_t *dec, HV *hv)
		966	{
		967	// for speed reasons, we specialcase single-string
		968	// byte or utf-8 strings as keys, but only when !stringref
		969
		970	if (ecb_expect_true (!dec->stringref))
		971	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		972	{
		973	STRLEN len = decode_uint (dec);
		974	char *key = (char *)dec->cur;
		975
		976	WANT (len);
		977	dec->cur += len;
		978
		979	hv_store (hv, key, len, decode_sv (dec), 0);
		980
		981	return;
		982	}
		983	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		984	{
		985	STRLEN len = decode_uint (dec);
		986	char *key = (char *)dec->cur;
		987
		988	WANT (len);
		989	dec->cur += len;
		990
		991	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		992	if (!is_utf8_string (key, len))
		993	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		994
		995	hv_store (hv, key, -len, decode_sv (dec), 0);
		996
		997	return;
		998	}
		999
		1000	SV *k = decode_sv (dec);
		1001	SV *v = decode_sv (dec);
		1002
		1003	// we leak memory if uncaught exceptions are thrown by random magical
		1004	// methods, and this is hopefully the only place where it can happen,
		1005	// so if there is a chance of an exception, take the very slow path.
		1006	// since catching exceptions is "undocumented/internal/forbidden" by
		1007	// the new p5p powers, we need to call out to a perl function :/
		1008	if (ecb_expect_false (SvAMAGIC (k)))
		1009	{
		1010	dSP;
		1011
		1012	ENTER; SAVETMPS;
		1013	PUSHMARK (SP);
		1014	EXTEND (SP, 3);
		1015	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		1016	PUSHs (sv_2mortal (k));
		1017	PUSHs (sv_2mortal (v));
		1018
		1019	PUTBACK;
		1020	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		1021	SPAGAIN;
		1022
		1023	FREETMPS; LEAVE;
		1024
		1025	if (SvTRUE (ERRSV))
		1026	ERR_ERRSV;
		1027
		1028	return;
		1029	}
		1030
		1031	hv_store_ent (hv, k, v, 0);
		1032	SvREFCNT_dec_NN (k);
		1033
		1034	fail:
		1035	;
		1036	}
		1037
522	static SV *	1038	static SV *
523	decode_hv (dec_t *dec)	1039	decode_hv (dec_t *dec)
524	{	1040	{
525	HV *hv = newHV ();	1041	HV *hv = newHV ();
526		1042
527	DEC_INC_DEPTH;	1043	DEC_INC_DEPTH;
528		1044
529	if ((*dec->cur & 31) == 31)	1045	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
530	{	1046	{
531	++dec->cur;	1047	++dec->cur;
532		1048
533	for (;;)	1049	for (;;)
534	{	1050	{
535	WANT (1);	1051	WANT (1);
536		1052
537	if (*dec->cur == (0xe0 | 31))	1053	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
538	{	1054	{
539	++dec->cur;	1055	++dec->cur;
540	break;	1056	break;
541	}	1057	}
542		1058
543	SV *k = decode_sv (dec);	1059	decode_he (dec, hv);
544	SV *v = decode_sv (dec);
545
546	hv_store_ent (hv, k, v, 0);
547	}	1060	}
548	}	1061	}
549	else	1062	else
550	{	1063	{
551	int len = decode_uint (dec);	1064	UV pairs = decode_uint (dec);
552		1065
		1066	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1067
553	while (len--)	1068	while (pairs--)
554	{	1069	decode_he (dec, hv);
555	SV *k = decode_sv (dec);
556	SV *v = decode_sv (dec);
557
558	hv_store_ent (hv, k, v, 0);
559	}
560	}	1070	}
561		1071
562	DEC_DEC_DEPTH;	1072	DEC_DEC_DEPTH;
563	return newRV_noinc ((SV *)hv);	1073	return newRV_noinc ((SV *)hv);
564		1074
565	#if 0	1075	fail:
566	SV *sv;	1076	SvREFCNT_dec_NN (hv);
567	HV *hv = newHV ();
568
569	DEC_INC_DEPTH;	1077	DEC_DEC_DEPTH;
570	decode_ws (dec);	1078	return &PL_sv_undef;
		1079	}
571		1080
572	for (;;)	1081	static SV *
573	{	1082	decode_str (dec_t *dec, int utf8)
574	// heuristic: assume that	1083	{
575	// a) decode_str + hv_store_ent are abysmally slow.	1084	SV *sv = 0;
576	// b) most hash keys are short, simple ascii text.	1085
577	// => try to "fast-match" such strings to avoid	1086	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
578	// the overhead of decode_str + hv_store_ent.
579	{	1087	{
580	SV *value;	1088	// indefinite length strings
581	char *p = dec->cur;	1089	++dec->cur;
582	char *e = p + 24; // only try up to 24 bytes
583		1090
		1091	U8 major = *dec->cur & MAJOR_MISC;
		1092
		1093	sv = newSVpvn ("", 0);
		1094
584	for (;;)	1095	for (;;)
585	{	1096	{
586	// the >= 0x80 is false on most architectures	1097	WANT (1);
587	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')	1098
		1099	if ((*dec->cur - major) > LENGTH_EXT8)
		1100	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
588	{	1101	{
589	// slow path, back up and use decode_str	1102	++dec->cur;
590	SV *key = decode_str (dec);
591	if (!key)
592	goto fail;
593
594	decode_ws (dec); EXPECT_CH (':');
595
596	decode_ws (dec);
597	value = decode_sv (dec);
598	if (!value)
599	{
600	SvREFCNT_dec (key);
601	goto fail;
602	}
603
604	hv_store_ent (hv, key, value, 0);
605	SvREFCNT_dec (key);
606
607	break;	1103	break;
608	}	1104	}
609	else if (*p == '"')
610	{
611	// fast path, got a simple key
612	char *key = dec->cur;
613	int len = p - key;
614	dec->cur = p + 1;
615
616	decode_ws (dec); EXPECT_CH (':');
617
618	decode_ws (dec);
619	value = decode_sv (dec);
620	if (!value)
621	goto fail;
622
623	hv_store (hv, key, len, value, 0);
624
625	break;
626	}
627
628	++p;
629	}
630	}
631
632	decode_ws (dec);
633
634	if (*dec->cur == '}')
635	{
636	++dec->cur;
637	break;
638	}
639
640	if (*dec->cur != ',')
641	ERR (", or } expected while parsing object/hash");
642
643	++dec->cur;
644
645	decode_ws (dec);
646
647	if (*dec->cur == '}' && dec->cbor.flags & F_RELAXED)
648	{
649	++dec->cur;
650	break;
651	}
652	}
653
654	DEC_DEC_DEPTH;
655	sv = newRV_noinc ((SV *)hv);
656
657	// check filter callbacks
658	if (dec->cbor.flags & F_HOOK)
659	{
660	if (dec->cbor.cb_sk_object && HvKEYS (hv) == 1)
661	{
662	HE *cb, *he;
663
664	hv_iterinit (hv);
665	he = hv_iternext (hv);
666	hv_iterinit (hv);
667
668	// the next line creates a mortal sv each time its called.
669	// might want to optimise this for common cases.
670	cb = hv_fetch_ent (dec->cbor.cb_sk_object, hv_iterkeysv (he), 0, 0);
671
672	if (cb)
673	{	1105	else
674	dSP;	1106	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
675	int count;
676		1107
677	ENTER; SAVETMPS; PUSHMARK (SP);	1108	STRLEN len = decode_uint (dec);
678	XPUSHs (HeVAL (he));
679	sv_2mortal (sv);
680		1109
681	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
682
683	if (count == 1)
684	{
685	sv = newSVsv (POPs);
686	FREETMPS; LEAVE;
687	return sv;
688	}
689
690	SvREFCNT_inc (sv);
691	FREETMPS; LEAVE;
692	}
693	}
694
695	if (dec->cbor.cb_object)
696	{
697	dSP;
698	int count;
699
700	ENTER; SAVETMPS; PUSHMARK (SP);
701	XPUSHs (sv_2mortal (sv));
702
703	PUTBACK; count = call_sv (dec->cbor.cb_object, G_ARRAY); SPAGAIN;
704
705	if (count == 1)
706	{
707	sv = newSVsv (POPs);
708	FREETMPS; LEAVE;
709	return sv;
710	}
711
712	SvREFCNT_inc (sv);
713	FREETMPS; LEAVE;
714	}
715	}
716
717	return sv;
718	#endif
719
720	fail:
721	SvREFCNT_dec (hv);
722	DEC_DEC_DEPTH;
723	return &PL_sv_undef;
724	}
725
726	static SV *
727	decode_str (dec_t *dec, int utf8)
728	{
729	SV *sv;
730
731	if ((*dec->cur & 31) == 31)
732	{
733	++dec->cur;
734
735	sv = newSVpvn ("", 0);
736
737	// not very fast, and certainly not robust against illegal input
738	for (;;)
739	{
740	WANT (1);	1110	WANT (len);
741		1111	sv_catpvn (sv, dec->cur, len);
742	if (*dec->cur == (0xe0 | 31))	1112	dec->cur += len;
743	{
744	++dec->cur;
745	break;
746	}
747
748	SV *sv2 = decode_sv (dec);
749	sv_catsv (sv, sv2);
750	}	1113	}
751	}	1114	}
752	else	1115	else
753	{	1116	{
754	STRLEN len = decode_uint (dec);	1117	STRLEN len = decode_uint (dec);
755		1118
756	WANT (len);	1119	WANT (len);
757	sv = newSVpvn (dec->cur, len);	1120	sv = newSVpvn (dec->cur, len);
758	dec->cur += len;	1121	dec->cur += len;
		1122
		1123	if (ecb_expect_false (dec->stringref)
		1124	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		1125	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
759	}	1126	}
760		1127
761	if (utf8)	1128	if (utf8)
		1129	{
		1130	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		1131	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		1132	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		1133
762	SvUTF8_on (sv);	1134	SvUTF8_on (sv);
		1135	}
763		1136
764	return sv;	1137	return sv;
765		1138
766	fail:	1139	fail:
		1140	SvREFCNT_dec (sv);
767	return &PL_sv_undef;	1141	return &PL_sv_undef;
768	}	1142	}
769		1143
770	static SV *	1144	static SV *
771	decode_tagged (dec_t *dec)	1145	decode_tagged (dec_t *dec)
772	{	1146	{
		1147	SV *sv = 0;
773	UV tag = decode_uint (dec);	1148	UV tag = decode_uint (dec);
		1149
		1150	WANT (1);
		1151
		1152	switch (tag)
		1153	{
		1154	case CBOR_TAG_MAGIC:
774	SV *sv = decode_sv (dec);	1155	sv = decode_sv (dec);
		1156	break;
775		1157
776	if (tag == 55799) // 2.4.5 Self-Describe CBOR	1158	case CBOR_TAG_INDIRECTION:
		1159	sv = newRV_noinc (decode_sv (dec));
		1160	break;
		1161
		1162	case CBOR_TAG_STRINGREF_NAMESPACE:
		1163	{
		1164	// do not use SAVETMPS/FREETMPS, as these will
		1165	// erase mortalised caches, e.g. "shareable"
		1166	ENTER;
		1167
		1168	SAVESPTR (dec->stringref);
		1169	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1170
		1171	sv = decode_sv (dec);
		1172
		1173	LEAVE;
		1174	}
		1175	break;
		1176
		1177	case CBOR_TAG_STRINGREF:
		1178	{
		1179	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1180	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1181
		1182	UV idx = decode_uint (dec);
		1183
		1184	if (!dec->stringref || idx >= (UV)(1 + AvFILLp (dec->stringref)))
		1185	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1186
		1187	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1188	}
		1189	break;
		1190
		1191	case CBOR_TAG_VALUE_SHAREABLE:
		1192	{
		1193	if (ecb_expect_false (!dec->shareable))
		1194	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1195
		1196	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1197	{
		1198	sv = newSV (0);
		1199	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1200
		1201	SV *osv = decode_sv (dec);
		1202	sv_setsv (sv, osv);
		1203	SvREFCNT_dec_NN (osv);
		1204	}
		1205	else
		1206	{
		1207	av_push (dec->shareable, &PL_sv_undef);
		1208	int idx = AvFILLp (dec->shareable);
		1209	sv = decode_sv (dec);
		1210	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1211	}
		1212	}
		1213	break;
		1214
		1215	case CBOR_TAG_VALUE_SHAREDREF:
		1216	{
		1217	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1218	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1219
		1220	UV idx = decode_uint (dec);
		1221
		1222	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
		1223	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1224
		1225	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1226
		1227	if (sv == &PL_sv_undef)
		1228	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1229	}
		1230	break;
		1231
		1232	case CBOR_TAG_PERL_OBJECT:
		1233	{
		1234	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1235	goto filter;
		1236
		1237	sv = decode_sv (dec);
		1238
		1239	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1240	ERR ("corrupted CBOR data (non-array perl object)");
		1241
		1242	AV *av = (AV *)SvRV (sv);
		1243	int len = av_len (av) + 1;
		1244	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1245
		1246	if (!stash)
		1247	ERR ("cannot decode perl-object (package does not exist)");
		1248
		1249	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1250
		1251	if (!method)
		1252	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1253
		1254	dSP;
		1255
		1256	ENTER; SAVETMPS;
		1257	PUSHMARK (SP);
		1258	EXTEND (SP, len + 1);
		1259	// we re-bless the reference to get overload and other niceties right
		1260	PUSHs (*av_fetch (av, 0, 1));
		1261	PUSHs (sv_cbor);
		1262
		1263	int i;
		1264
		1265	for (i = 1; i < len; ++i)
		1266	PUSHs (*av_fetch (av, i, 1));
		1267
		1268	PUTBACK;
		1269	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1270	SPAGAIN;
		1271
		1272	if (SvTRUE (ERRSV))
		1273	{
		1274	FREETMPS; LEAVE;
		1275	ERR_ERRSV;
		1276	}
		1277
		1278	SvREFCNT_dec_NN (sv);
		1279	sv = SvREFCNT_inc (POPs);
		1280
		1281	PUTBACK;
		1282
		1283	FREETMPS; LEAVE;
		1284	}
		1285	break;
		1286
		1287	default:
		1288	filter:
		1289	{
		1290	SV *tag_sv = newSVuv (tag);
		1291
		1292	sv = decode_sv (dec);
		1293
		1294	dSP;
		1295	ENTER; SAVETMPS;
		1296	PUSHMARK (SP);
		1297	EXTEND (SP, 2);
		1298	PUSHs (tag_sv);
		1299	PUSHs (sv);
		1300
		1301	PUTBACK;
		1302	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1303	SPAGAIN;
		1304
		1305	if (SvTRUE (ERRSV))
		1306	{
		1307	SvREFCNT_dec_NN (tag_sv);
		1308	FREETMPS; LEAVE;
		1309	ERR_ERRSV;
		1310	}
		1311
		1312	if (count)
		1313	{
		1314	SvREFCNT_dec_NN (tag_sv);
		1315	SvREFCNT_dec_NN (sv);
		1316	sv = SvREFCNT_inc_NN (TOPs);
		1317	SP -= count;
		1318	}
		1319	else
		1320	{
		1321	AV *av = newAV ();
		1322	av_push (av, tag_sv);
		1323	av_push (av, sv);
		1324
		1325	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1326	? cbor_tagged_stash
		1327	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1328	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1329	}
		1330
		1331	PUTBACK;
		1332
		1333	FREETMPS; LEAVE;
		1334	}
		1335	break;
		1336	}
		1337
777	return sv;	1338	return sv;
778		1339
779	AV *av = newAV ();	1340	fail:
780	av_push (av, newSVuv (tag));	1341	SvREFCNT_dec (sv);
781	av_push (av, sv);	1342	return &PL_sv_undef;
782	return newRV_noinc ((SV *)av);
783	}	1343	}
784		1344
785	static SV *	1345	static SV *
786	decode_sv (dec_t *dec)	1346	decode_sv (dec_t *dec)
787	{	1347	{
788	WANT (1);	1348	WANT (1);
789		1349
790	switch (*dec->cur >> 5)	1350	switch (*dec->cur >> MAJOR_SHIFT)
791	{	1351	{
792	case 0: // unsigned int	1352	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
793	//TODO: 64 bit values on 3 2bit perls	1353	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
794	return newSVuv (decode_uint (dec));	1354	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
795	case 1: // negative int	1355	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
796	return newSViv (-1 - (IV)decode_uint (dec));	1356	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
797	case 2: // octet string	1357	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
798	return decode_str (dec, 0);	1358	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
799	case 3: // utf-8 string	1359
800	return decode_str (dec, 1);	1360	case MAJOR_MISC >> MAJOR_SHIFT:
801	case 4: // array
802	return decode_av (dec);
803	case 5: // map
804	return decode_hv (dec);
805	case 6: // tag
806	return decode_tagged (dec);
807	case 7: // misc
808	switch (*dec->cur++ & 31)	1361	switch (*dec->cur++ & MINOR_MASK)
809	{	1362	{
810	case 20:	1363	case SIMPLE_FALSE:
811	#if CBOR_SLOW	1364	#if CBOR_SLOW
812	cbor_false = get_bool ("CBOR::XS::false");	1365	types_false = get_bool ("Types::Serialiser::false");
813	#endif	1366	#endif
814	return newSVsv (cbor_false);	1367	return newSVsv (types_false);
815	case 21:	1368	case SIMPLE_TRUE:
816	#if CBOR_SLOW	1369	#if CBOR_SLOW
817	cbor_true = get_bool ("CBOR::XS::true");	1370	types_true = get_bool ("Types::Serialiser::true");
818	#endif	1371	#endif
819	return newSVsv (cbor_true);	1372	return newSVsv (types_true);
820	case 22:	1373	case SIMPLE_NULL:
821	return newSVsv (&PL_sv_undef);	1374	return newSVsv (&PL_sv_undef);
		1375	case SIMPLE_UNDEF:
		1376	#if CBOR_SLOW
		1377	types_error = get_bool ("Types::Serialiser::error");
		1378	#endif
		1379	return newSVsv (types_error);
822		1380
823	case 25:	1381	case MISC_FLOAT16:
824	{	1382	{
825	WANT (2);	1383	WANT (2);
826		1384
827	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1385	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
828	dec->cur += 2;	1386	dec->cur += 2;
829		1387
830	return newSVnv (ecb_binary16_to_float (fp));	1388	return newSVnv (ecb_binary16_to_float (fp));
831	}	1389	}
832		1390
833	case 26:	1391	case MISC_FLOAT32:
834	{	1392	{
835	uint32_t fp;	1393	uint32_t fp;
836	WANT (4);	1394	WANT (4);
837	memcpy (&fp, dec->cur, 4);	1395	memcpy (&fp, dec->cur, 4);
838	dec->cur += 4;	1396	dec->cur += 4;
…		…
841	fp = ecb_bswap32 (fp);	1399	fp = ecb_bswap32 (fp);
842		1400
843	return newSVnv (ecb_binary32_to_float (fp));	1401	return newSVnv (ecb_binary32_to_float (fp));
844	}	1402	}
845		1403
846	case 27:	1404	case MISC_FLOAT64:
847	{	1405	{
848	uint64_t fp;	1406	uint64_t fp;
849	WANT (8);	1407	WANT (8);
850	memcpy (&fp, dec->cur, 8);	1408	memcpy (&fp, dec->cur, 8);
851	dec->cur += 8;	1409	dec->cur += 8;
…		…
854	fp = ecb_bswap64 (fp);	1412	fp = ecb_bswap64 (fp);
855		1413
856	return newSVnv (ecb_binary64_to_double (fp));	1414	return newSVnv (ecb_binary64_to_double (fp));
857	}	1415	}
858		1416
859	// 0..19 unassigned	1417	// 0..19 unassigned simple
860	// 24 reserved + unassigned (reserved values are not encodable)	1418	// 24 reserved + unassigned simple (reserved values are not encodable)
		1419	// 28-30 unassigned misc
		1420	// 31 break code
861	default:	1421	default:
862	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1422	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
863	}	1423	}
864		1424
865	break;	1425	break;
866	}	1426	}
867	#if 0
868	switch (*dec->cur)
869	{
870	//case '"': ++dec->cur; return decode_str (dec);
871	case '[': ++dec->cur; return decode_av (dec);
872	case '{': ++dec->cur; return decode_hv (dec);
873
874	case '-':
875	case '0': case '1': case '2': case '3': case '4':
876	case '5': case '6': case '7': case '8': case '9':
877	//TODO return decode_num (dec);
878
879	case 't':
880	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
881	{
882	dec->cur += 4;
883	#if CBOR_SLOW
884	cbor_true = get_bool ("CBOR::XS::true");
885	#endif
886	return newSVsv (cbor_true);
887	}
888	else
889	ERR ("'true' expected");
890
891	break;
892
893	case 'f':
894	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
895	{
896	dec->cur += 5;
897	#if CBOR_SLOW
898	cbor_false = get_bool ("CBOR::XS::false");
899	#endif
900	return newSVsv (cbor_false);
901	}
902	else
903	ERR ("'false' expected");
904
905	break;
906
907	case 'n':
908	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
909	{
910	dec->cur += 4;
911	return newSVsv (&PL_sv_undef);
912	}
913	else
914	ERR ("'null' expected");
915
916	break;
917
918	default:
919	ERR ("malformed CBOR string, neither array, object, number, string or atom");
920	break;
921	}
922	#endif
923		1427
924	fail:	1428	fail:
925	return &PL_sv_undef;	1429	return &PL_sv_undef;
926	}	1430	}
927		1431
928	static SV *	1432	static SV *
929	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1433	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
930	{	1434	{
931	dec_t dec;	1435	dec_t dec = { 0 };
932	SV *sv;	1436	SV *sv;
		1437	STRLEN len;
		1438	char *data = SvPVbyte (string, len);
933		1439
934	/* work around bugs in 5.10 where manipulating magic values
935	* makes perl ignore the magic in subsequent accesses.
936	* also make a copy of non-PV values, to get them into a clean
937	* state (SvPV should do that, but it's buggy, see below).
938	*/
939	/*SvGETMAGIC (string);*/
940	if (SvMAGICAL (string) || !SvPOK (string))
941	string = sv_2mortal (newSVsv (string));
942
943	SvUPGRADE (string, SVt_PV);
944
945	/* work around a bug in perl 5.10, which causes SvCUR to fail an
946	* assertion with -DDEBUGGING, although SvCUR is documented to
947	* return the xpv_cur field which certainly exists after upgrading.
948	* according to nicholas clark, calling SvPOK fixes this.
949	* But it doesn't fix it, so try another workaround, call SvPV_nolen
950	* and hope for the best.
951	* Damnit, SvPV_nolen still trips over yet another assertion. This
952	* assertion business is seriously broken, try yet another workaround
953	* for the broken -DDEBUGGING.
954	*/
955	{
956	#ifdef DEBUGGING
957	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
958	#else
959	STRLEN offset = SvCUR (string);
960	#endif
961
962	if (offset > cbor->max_size && cbor->max_size)	1440	if (len > cbor->max_size && cbor->max_size)
963	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1441	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
964	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1442	(unsigned long)len, (unsigned long)cbor->max_size);
965	}
966
967	sv_utf8_downgrade (string, 0);
968		1443
969	dec.cbor = *cbor;	1444	dec.cbor = *cbor;
970	dec.cur = (U8 *)SvPVX (string);	1445	dec.cur = (U8 *)data;
971	dec.end = (U8 *)SvEND (string);	1446	dec.end = (U8 *)data + len;
972	dec.err = 0;
973	dec.depth = 0;
974
975	if (dec.cbor.cb_object || dec.cbor.cb_sk_object)
976	;//TODO dec.cbor.flags |= F_HOOK;
977		1447
978	sv = decode_sv (&dec);	1448	sv = decode_sv (&dec);
979		1449
980	if (offset_return)	1450	if (offset_return)
981	*offset_return = dec.cur;	1451	*offset_return = dec.cur;
…		…
984	if (dec.cur != dec.end && !dec.err)	1454	if (dec.cur != dec.end && !dec.err)
985	dec.err = "garbage after CBOR object";	1455	dec.err = "garbage after CBOR object";
986		1456
987	if (dec.err)	1457	if (dec.err)
988	{	1458	{
		1459	if (dec.shareable)
		1460	{
		1461	// need to break cyclic links, which would all be in shareable
		1462	int i;
		1463	SV **svp;
		1464
		1465	for (i = av_len (dec.shareable) + 1; i--; )
		1466	if ((svp = av_fetch (dec.shareable, i, 0)))
		1467	sv_setsv (*svp, &PL_sv_undef);
		1468	}
		1469
989	SvREFCNT_dec (sv);	1470	SvREFCNT_dec_NN (sv);
		1471
		1472	if (dec.err_sv)
		1473	sv_2mortal (dec.err_sv);
		1474
990	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1475	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
991	}	1476	}
992		1477
993	sv = sv_2mortal (sv);	1478	sv = sv_2mortal (sv);
994		1479
995	return sv;	1480	return sv;
996	}	1481	}
997		1482
		1483	/////////////////////////////////////////////////////////////////////////////
		1484	// incremental parser
		1485
		1486	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1487
		1488	// returns 0 for notyet, 1 for success or error
		1489	static int
		1490	incr_parse (CBOR *self, SV *cborstr)
		1491	{
		1492	STRLEN cur;
		1493	SvPV (cborstr, cur);
		1494
		1495	while (ecb_expect_true (self->incr_need <= cur))
		1496	{
		1497	// table of integer count bytes
		1498	static I8 incr_len[MINOR_MASK + 1] = {
		1499	0, 0, 0, 0, 0, 0, 0, 0,
		1500	0, 0, 0, 0, 0, 0, 0, 0,
		1501	0, 0, 0, 0, 0, 0, 0, 0,
		1502	1, 2, 4, 8,-1,-1,-1,-2
		1503	};
		1504
		1505	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1506	U8 m = *p & MINOR_MASK;
		1507	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1508	I8 ilen = incr_len[m];
		1509
		1510	self->incr_need = self->incr_pos + 1;
		1511
		1512	if (ecb_expect_false (ilen < 0))
		1513	{
		1514	if (m != MINOR_INDEF)
		1515	return 1; // error
		1516
		1517	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1518	{
		1519	if (count >= 0)
		1520	return 1; // error
		1521
		1522	count = 1;
		1523	}
		1524	else
		1525	{
		1526	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1527	count = -1;
		1528	}
		1529	}
		1530	else
		1531	{
		1532	self->incr_need += ilen;
		1533	if (ecb_expect_false (self->incr_need > cur))
		1534	return 0;
		1535
		1536	int major = *p >> MAJOR_SHIFT;
		1537
		1538	switch (major)
		1539	{
		1540	case MAJOR_TAG >> MAJOR_SHIFT:
		1541	++count; // tags merely prefix another value
		1542	break;
		1543
		1544	case MAJOR_BYTES >> MAJOR_SHIFT:
		1545	case MAJOR_TEXT >> MAJOR_SHIFT:
		1546	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1547	case MAJOR_MAP >> MAJOR_SHIFT:
		1548	{
		1549	UV len;
		1550
		1551	if (ecb_expect_false (ilen))
		1552	{
		1553	len = 0;
		1554
		1555	do {
		1556	len = (len << 8) | *++p;
		1557	} while (--ilen);
		1558	}
		1559	else
		1560	len = m;
		1561
		1562	switch (major)
		1563	{
		1564	case MAJOR_BYTES >> MAJOR_SHIFT:
		1565	case MAJOR_TEXT >> MAJOR_SHIFT:
		1566	self->incr_need += len;
		1567	if (ecb_expect_false (self->incr_need > cur))
		1568	return 0;
		1569
		1570	break;
		1571
		1572	case MAJOR_MAP >> MAJOR_SHIFT:
		1573	len <<= 1;
		1574	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1575	if (len)
		1576	{
		1577	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1578	count = len + 1;
		1579	}
		1580	break;
		1581	}
		1582	}
		1583	}
		1584	}
		1585
		1586	self->incr_pos = self->incr_need;
		1587
		1588	if (count > 0)
		1589	{
		1590	while (!--count)
		1591	{
		1592	if (!AvFILLp (self->incr_count))
		1593	return 1; // done
		1594
		1595	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1596	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1597	}
		1598
		1599	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1600	}
		1601	}
		1602
		1603	return 0;
		1604	}
		1605
		1606
998	/////////////////////////////////////////////////////////////////////////////	1607	/////////////////////////////////////////////////////////////////////////////
999	// XS interface functions	1608	// XS interface functions
1000		1609
1001	MODULE = CBOR::XS PACKAGE = CBOR::XS	1610	MODULE = CBOR::XS PACKAGE = CBOR::XS
1002		1611
1003	BOOT:	1612	BOOT:
1004	{	1613	{
1005	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1614	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1006	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1615	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1007		1616
1008	cbor_true = get_bool ("CBOR::XS::true");	1617	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1009	cbor_false = get_bool ("CBOR::XS::false");	1618	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1619
		1620	types_true = get_bool ("Types::Serialiser::true" );
		1621	types_false = get_bool ("Types::Serialiser::false");
		1622	types_error = get_bool ("Types::Serialiser::error");
		1623
		1624	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1625
		1626	sv_cbor = newSVpv ("CBOR", 0);
		1627	SvREADONLY_on (sv_cbor);
		1628
		1629	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
1010	}	1630	}
1011		1631
1012	PROTOTYPES: DISABLE	1632	PROTOTYPES: DISABLE
1013		1633
1014	void CLONE (...)	1634	void CLONE (...)
1015	CODE:	1635	CODE:
1016	cbor_stash = 0;	1636	cbor_stash = 0;
		1637	cbor_tagged_stash = 0;
		1638	types_error_stash = 0;
1017	cbor_boolean_stash = 0;	1639	types_boolean_stash = 0;
1018		1640
1019	void new (char *klass)	1641	void new (char *klass)
1020	PPCODE:	1642	PPCODE:
1021	{	1643	{
1022	SV *pv = NEWSV (0, sizeof (CBOR));	1644	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1030		1652
1031	void shrink (CBOR *self, int enable = 1)	1653	void shrink (CBOR *self, int enable = 1)
1032	ALIAS:	1654	ALIAS:
1033	shrink = F_SHRINK	1655	shrink = F_SHRINK
1034	allow_unknown = F_ALLOW_UNKNOWN	1656	allow_unknown = F_ALLOW_UNKNOWN
		1657	allow_sharing = F_ALLOW_SHARING
		1658	allow_cycles = F_ALLOW_CYCLES
		1659	forbid_objects = F_FORBID_OBJECTS
		1660	pack_strings = F_PACK_STRINGS
		1661	text_keys = F_TEXT_KEYS
		1662	text_strings = F_TEXT_STRINGS
		1663	validate_utf8 = F_VALIDATE_UTF8
1035	PPCODE:	1664	PPCODE:
1036	{	1665	{
1037	if (enable)	1666	if (enable)
1038	self->flags |= ix;	1667	self->flags |= ix;
1039	else	1668	else
…		…
1044		1673
1045	void get_shrink (CBOR *self)	1674	void get_shrink (CBOR *self)
1046	ALIAS:	1675	ALIAS:
1047	get_shrink = F_SHRINK	1676	get_shrink = F_SHRINK
1048	get_allow_unknown = F_ALLOW_UNKNOWN	1677	get_allow_unknown = F_ALLOW_UNKNOWN
		1678	get_allow_sharing = F_ALLOW_SHARING
		1679	get_allow_cycles = F_ALLOW_CYCLES
		1680	get_forbid_objects = F_FORBID_OBJECTS
		1681	get_pack_strings = F_PACK_STRINGS
		1682	get_text_keys = F_TEXT_KEYS
		1683	get_text_strings = F_TEXT_STRINGS
		1684	get_validate_utf8 = F_VALIDATE_UTF8
1049	PPCODE:	1685	PPCODE:
1050	XPUSHs (boolSV (self->flags & ix));	1686	XPUSHs (boolSV (self->flags & ix));
1051		1687
1052	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1688	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1053	PPCODE:	1689	PPCODE:
…		…
1069	CODE:	1705	CODE:
1070	RETVAL = self->max_size;	1706	RETVAL = self->max_size;
1071	OUTPUT:	1707	OUTPUT:
1072	RETVAL	1708	RETVAL
1073		1709
1074	#if 0 //TODO	1710	void filter (CBOR *self, SV *filter = 0)
1075
1076	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1077	PPCODE:	1711	PPCODE:
1078	{
1079	SvREFCNT_dec (self->cb_object);	1712	SvREFCNT_dec (self->filter);
1080	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1713	self->filter = filter ? newSVsv (filter) : filter;
1081
1082	XPUSHs (ST (0));	1714	XPUSHs (ST (0));
1083	}
1084		1715
1085	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1716	SV *get_filter (CBOR *self)
1086	PPCODE:	1717	CODE:
1087	{	1718	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1088	if (!self->cb_sk_object)	1719	OUTPUT:
1089	self->cb_sk_object = newHV ();	1720	RETVAL
1090
1091	if (SvOK (cb))
1092	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1093	else
1094	{
1095	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1096
1097	if (!HvKEYS (self->cb_sk_object))
1098	{
1099	SvREFCNT_dec (self->cb_sk_object);
1100	self->cb_sk_object = 0;
1101	}
1102	}
1103
1104	XPUSHs (ST (0));
1105	}
1106
1107	#endif
1108		1721
1109	void encode (CBOR *self, SV *scalar)	1722	void encode (CBOR *self, SV *scalar)
1110	PPCODE:	1723	PPCODE:
1111	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1724	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1112	XPUSHs (scalar);	1725	XPUSHs (scalar);
…		…
1125	EXTEND (SP, 2);	1738	EXTEND (SP, 2);
1126	PUSHs (sv);	1739	PUSHs (sv);
1127	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1740	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1128	}	1741	}
1129		1742
		1743	void incr_parse (CBOR *self, SV *cborstr)
		1744	ALIAS:
		1745	incr_parse_multiple = 1
		1746	PPCODE:
		1747	{
		1748	if (SvUTF8 (cborstr))
		1749	sv_utf8_downgrade (cborstr, 0);
		1750
		1751	if (!self->incr_count)
		1752	{
		1753	self->incr_count = newAV ();
		1754	self->incr_pos = 0;
		1755	self->incr_need = 1;
		1756
		1757	av_push (self->incr_count, newSViv (1));
		1758	}
		1759
		1760	do
		1761	{
		1762	if (!incr_parse (self, cborstr))
		1763	{
		1764	if (self->incr_need > self->max_size && self->max_size)
		1765	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1766	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1767
		1768	break;
		1769	}
		1770
		1771	SV *sv;
		1772	char *offset;
		1773
		1774	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1775	XPUSHs (sv);
		1776
		1777	sv_chop (cborstr, offset);
		1778
		1779	av_clear (self->incr_count);
		1780	av_push (self->incr_count, newSViv (1));
		1781
		1782	self->incr_pos = 0;
		1783	self->incr_need = self->incr_pos + 1;
		1784	}
		1785	while (ix);
		1786	}
		1787
		1788	void incr_reset (CBOR *self)
		1789	CODE:
		1790	{
		1791	SvREFCNT_dec (self->incr_count);
		1792	self->incr_count = 0;
		1793	}
		1794
1130	void DESTROY (CBOR *self)	1795	void DESTROY (CBOR *self)
1131	CODE:	1796	PPCODE:
1132	SvREFCNT_dec (self->cb_sk_object);	1797	cbor_free (self);
1133	SvREFCNT_dec (self->cb_object);
1134		1798
1135	PROTOTYPES: ENABLE	1799	PROTOTYPES: ENABLE
1136		1800
1137	void encode_cbor (SV *scalar)	1801	void encode_cbor (SV *scalar)
		1802	ALIAS:
		1803	encode_cbor = 0
		1804	encode_cbor_sharing = F_ALLOW_SHARING
1138	PPCODE:	1805	PPCODE:
1139	{	1806	{
1140	CBOR cbor;	1807	CBOR cbor;
1141	cbor_init (&cbor);	1808	cbor_init (&cbor);
		1809	cbor.flags |= ix;
1142	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1810	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1143	XPUSHs (scalar);	1811	XPUSHs (scalar);
1144	}	1812	}
1145		1813
1146	void decode_cbor (SV *cborstr)	1814	void decode_cbor (SV *cborstr)
…		…
1150	cbor_init (&cbor);	1818	cbor_init (&cbor);
1151	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1819	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1152	XPUSHs (cborstr);	1820	XPUSHs (cborstr);
1153	}	1821	}
1154		1822
		1823	#ifdef __AFL_COMPILER
		1824
		1825	void
		1826	afl_init ()
		1827	CODE:
		1828	__AFL_INIT ();
		1829
		1830	int
		1831	afl_loop (unsigned int count = 10000)
		1832	CODE:
		1833	RETVAL = __AFL_LOOP (count);
		1834	OUTPUT:
		1835	RETVAL
		1836
		1837	#endif
		1838

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