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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.6 by root, Sat Oct 26 22:25:47 2013 UTC vs.
Revision 1.71 by root, Fri Mar 19 17:30:27 2021 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_tagged_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;
		155
		156	// for the incremental parser
		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.
43	} CBOR;	160	} CBOR;
44		161
45	ecb_inline void	162	ecb_inline void
46	cbor_init (CBOR *cbor)	163	cbor_init (CBOR *cbor)
47	{	164	{
48	Zero (cbor, 1, CBOR);	165	Zero (cbor, 1, CBOR);
49	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);
50	}	174	}
51		175
52	/////////////////////////////////////////////////////////////////////////////	176	/////////////////////////////////////////////////////////////////////////////
53	// utility functions	177	// utility functions
54		178
…		…
76	SvPV_renew (sv, SvCUR (sv) + 1);	200	SvPV_renew (sv, SvCUR (sv) + 1);
77	#endif	201	#endif
78	}	202	}
79	}	203	}
80		204
81	/////////////////////////////////////////////////////////////////////////////	205	// minimum length of a string to be registered for stringref
82	// fp hell	206	ecb_inline STRLEN
83		207	minimum_string_length (UV idx)
84	//TODO	208	{
		209	return idx <= 23 ? 3
		210	: idx <= 0xffU ? 4
		211	: idx <= 0xffffU ? 5
		212	: idx <= 0xffffffffU ? 7
		213	: 11;
		214	}
85		215
86	/////////////////////////////////////////////////////////////////////////////	216	/////////////////////////////////////////////////////////////////////////////
87	// encoder	217	// encoder
88		218
89	// structure used for encoding CBOR	219	// structure used for encoding CBOR
…		…
92	char *cur; // SvPVX (sv) + current output position	222	char *cur; // SvPVX (sv) + current output position
93	char *end; // SvEND (sv)	223	char *end; // SvEND (sv)
94	SV *sv; // result scalar	224	SV *sv; // result scalar
95	CBOR cbor;	225	CBOR cbor;
96	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;
97	} enc_t;	231	} enc_t;
98		232
99	ecb_inline void	233	ecb_inline void
100	need (enc_t *enc, STRLEN len)	234	need (enc_t *enc, STRLEN len)
101	{	235	{
102	if (ecb_expect_false (enc->cur + len >= enc->end))	236	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
103	{	237	{
104	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	238	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
105	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	239	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
106	enc->cur = SvPVX (enc->sv) + cur;	240	enc->cur = SvPVX (enc->sv) + cur;
107	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	241	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
108	}	242	}
109	}	243	}
110		244
		245	static void encode_sv (enc_t *enc, SV *sv);
		246
111	ecb_inline void	247	ecb_inline void
112	encode_ch (enc_t *enc, char ch)	248	encode_ch (enc_t *enc, char ch)
113	{	249	{
114	need (enc, 1);	250	need (enc, 1);
115	*enc->cur++ = ch;	251	*enc->cur++ = ch;
116	}	252	}
117		253
		254	// used for tags, intregers, element counts and so on
118	static void	255	static void
119	encode_uint (enc_t *enc, int major, UV len)	256	encode_uint (enc_t *enc, int major, UV len)
120	{	257	{
121	need (enc, 9);	258	need (enc, 9);
122		259
123	if (len < 24)	260	if (ecb_expect_true (len < LENGTH_EXT1))
124	*enc->cur++ = major | len;	261	*enc->cur++ = major | len;
125	else if (len <= 0xff)	262	else if (ecb_expect_true (len <= 0xffU))
126	{	263	{
127	*enc->cur++ = major | 24;	264	*enc->cur++ = major | LENGTH_EXT1;
128	*enc->cur++ = len;	265	*enc->cur++ = len;
129	}	266	}
130	else if (len <= 0xffff)	267	else if (len <= 0xffffU)
131	{	268	{
132	*enc->cur++ = major | 25;	269	*enc->cur++ = major | LENGTH_EXT2;
133	*enc->cur++ = len >> 8;	270	*enc->cur++ = len >> 8;
134	*enc->cur++ = len;	271	*enc->cur++ = len;
135	}	272	}
136	else if (len <= 0xffffffff)	273	else if (len <= 0xffffffffU)
137	{	274	{
138	*enc->cur++ = major | 26;	275	*enc->cur++ = major | LENGTH_EXT4;
139	*enc->cur++ = len >> 24;	276	*enc->cur++ = len >> 24;
140	*enc->cur++ = len >> 16;	277	*enc->cur++ = len >> 16;
141	*enc->cur++ = len >> 8;	278	*enc->cur++ = len >> 8;
142	*enc->cur++ = len;	279	*enc->cur++ = len;
143	}	280	}
144	else	281	else
145	{	282	{
146	*enc->cur++ = major | 27;	283	*enc->cur++ = major | LENGTH_EXT8;
147	*enc->cur++ = len >> 56;	284	*enc->cur++ = len >> 56;
148	*enc->cur++ = len >> 48;	285	*enc->cur++ = len >> 48;
149	*enc->cur++ = len >> 40;	286	*enc->cur++ = len >> 40;
150	*enc->cur++ = len >> 32;	287	*enc->cur++ = len >> 32;
151	*enc->cur++ = len >> 24;	288	*enc->cur++ = len >> 24;
…		…
153	*enc->cur++ = len >> 8;	290	*enc->cur++ = len >> 8;
154	*enc->cur++ = len;	291	*enc->cur++ = len;
155	}	292	}
156	}	293	}
157		294
158	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
159	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	315	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
160	{	316	{
161	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);
162	need (enc, len);	347	need (enc, len);
163	memcpy (enc->cur, str, len);	348	memcpy (enc->cur, str, len);
164	enc->cur += len;	349	enc->cur += len;
165	}	350	}
166		351
167	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	}
168		507
169	static void	508	static void
170	encode_av (enc_t *enc, AV *av)	509	encode_av (enc_t *enc, AV *av)
171	{	510	{
172	int i, len = av_len (av);	511	int i, len = av_len (av);
…		…
174	if (enc->depth >= enc->cbor.max_depth)	513	if (enc->depth >= enc->cbor.max_depth)
175	croak (ERR_NESTING_EXCEEDED);	514	croak (ERR_NESTING_EXCEEDED);
176		515
177	++enc->depth;	516	++enc->depth;
178		517
179	encode_uint (enc, 0x80, len + 1);	518	encode_uint (enc, MAJOR_ARRAY, len + 1);
180		519
		520	if (ecb_expect_false (SvMAGICAL (av)))
181	for (i = 0; i <= len; ++i)	521	for (i = 0; i <= len; ++i)
182	{	522	{
183	SV **svp = av_fetch (av, i, 0);	523	SV **svp = av_fetch (av, i, 0);
184	encode_sv (enc, svp ? *svp : &PL_sv_undef);	524	encode_sv (enc, svp ? *svp : &PL_sv_undef);
185	}	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	}
186		532
187	--enc->depth;	533	--enc->depth;
188	}	534	}
189		535
190	static void	536	static void
…		…
198	++enc->depth;	544	++enc->depth;
199		545
200	int pairs = hv_iterinit (hv);	546	int pairs = hv_iterinit (hv);
201	int mg = SvMAGICAL (hv);	547	int mg = SvMAGICAL (hv);
202		548
203	if (mg)	549	if (ecb_expect_false (mg))
204	encode_ch (enc, 0xa0 | 31);	550	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
205	else	551	else
206	encode_uint (enc, 0xa0, pairs);	552	encode_uint (enc, MAJOR_MAP, pairs);
207		553
208	while ((he = hv_iternext (hv)))	554	while ((he = hv_iternext (hv)))
209	{	555	{
210	if (HeKLEN (he) == HEf_SVKEY)	556	if (HeKLEN (he) == HEf_SVKEY)
211	encode_sv (enc, HeSVKEY (he));	557	encode_sv (enc, HeSVKEY (he));
212	else	558	else
213	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));
214		560
215	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));
216	}	562	}
217		563
218	if (mg)	564	if (ecb_expect_false (mg))
219	encode_ch (enc, 0xe0 | 31);	565	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
220		566
221	--enc->depth;	567	--enc->depth;
222	}	568	}
223		569
224	// encode objects, arrays and special \0=false and \1=true values.	570	// encode objects, arrays and special \0=false and \1=true values.
225	static void	571	static void
226	encode_rv (enc_t *enc, SV *sv)	572	encode_rv (enc_t *enc, SV *sv)
227	{	573	{
228	svtype svt;
229
230	SvGETMAGIC (sv);	574	SvGETMAGIC (sv);
		575
231	svt = SvTYPE (sv);	576	svtype svt = SvTYPE (sv);
232		577
233	if (ecb_expect_false (SvOBJECT (sv)))	578	if (ecb_expect_false (SvOBJECT (sv)))
234	{	579	{
235	HV *boolean_stash = !CBOR_SLOW || cbor_boolean_stash	580	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
236	? cbor_boolean_stash	581	? types_boolean_stash
237	: gv_stashpv ("CBOR::XS::Boolean", 1);	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);
238	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	586	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
239	? cbor_tagged_stash	587	? cbor_tagged_stash
240	: gv_stashpv ("CBOR::XS::Tagged" , 1);	588	: gv_stashpv ("CBOR::XS::Tagged" , 1);
241		589
		590	HV *stash = SvSTASH (sv);
		591
242	if (SvSTASH (sv) == boolean_stash)	592	if (stash == boolean_stash)
243	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	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	}
244	else if (SvSTASH (sv) == tagged_stash)	602	else if (stash == tagged_stash)
245	{	603	{
246	if (svt != SVt_PVAV)	604	if (svt != SVt_PVAV)
247	croak ("encountered CBOR::XS::Tagged object that isn't an array");	605	croak ("encountered CBOR::XS::Tagged object that isn't an array");
248		606
		607	switch (av_len ((AV *)sv))
		608	{
		609	case 2-1:
		610	// actually a tagged value
249	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	611	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
250	encode_sv (enc, *av_fetch ((AV *)sv, 1, 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;
251	}	641	}
252	else	642	else
253	{	643	{
		644	sv_setuv (*svp, enc->shareable_idx);
		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)))
		659	{
		660	dSP;
		661
		662	ENTER; SAVETMPS;
		663	PUSHMARK (SP);
254	// 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
255	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
256
257	if (to_cbor)
258	{
259	dSP;
260
261	ENTER; SAVETMPS; PUSHMARK (SP);
262	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	665	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
263		666
264	// calling with G_SCALAR ensures that we always get a 1 return value
265	PUTBACK;	667	PUTBACK;
		668	// G_SCALAR ensures that return value is 1
266	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	669	call_sv ((SV *)GvCV (method), G_SCALAR);
267	SPAGAIN;	670	SPAGAIN;
268		671
269	// catch this surprisingly common error	672	// catch this surprisingly common error
270	if (SvROK (TOPs) && SvRV (TOPs) == sv)	673	if (SvROK (TOPs) && SvRV (TOPs) == sv)
271	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));
272		675
273	sv = POPs;	676	encode_sv (enc, POPs);
		677
274	PUTBACK;	678	PUTBACK;
275		679
276	encode_sv (enc, sv);
277
278	FREETMPS; LEAVE;	680	FREETMPS; LEAVE;
		681	}
		682	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
		683	{
		684	dSP;
		685
		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;
279	}	712	}
		713
		714	PUTBACK;
		715
		716	FREETMPS; LEAVE;
		717	}
280	else	718	else
281	croak ("encountered object '%s', but no TO_CBOR method available on it",	719	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
282	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	720	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
283	}
284	}	721	}
285	else if (svt == SVt_PVHV)	722	else if (svt == SVt_PVHV)
286	encode_hv (enc, (HV *)sv);	723	encode_hv (enc, (HV *)sv);
287	else if (svt == SVt_PVAV)	724	else if (svt == SVt_PVAV)
288	encode_av (enc, (AV *)sv);	725	encode_av (enc, (AV *)sv);
289	else if (svt < SVt_PVAV)
290	{
291	STRLEN len = 0;
292	char *pv = svt ? SvPV (sv, len) : 0;
293
294	if (len == 1 && *pv == '1')
295	encode_ch (enc, 0xe0 | 21);
296	else if (len == 1 && *pv == '0')
297	encode_ch (enc, 0xe0 | 20);
298	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
299	encode_ch (enc, 0xe0 | 23);
300	else
301	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
302	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
303	}
304	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
305	encode_ch (enc, 0xe0 | 23);
306	else	726	else
307	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	727	{
308	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	728	encode_tag (enc, CBOR_TAG_INDIRECTION);
		729	encode_sv (enc, sv);
		730	}
309	}	731	}
310		732
311	static void	733	static void
312	encode_nv (enc_t *enc, SV *sv)	734	encode_nv (enc_t *enc, SV *sv)
313	{	735	{
314	double nv = SvNVX (sv);	736	double nv = SvNVX (sv);
315		737
316	need (enc, 9);	738	need (enc, 9);
317		739
318	if (ecb_expect_false (nv == (U32)nv))	740	if (ecb_expect_false (nv == (NV)(U32)nv))
319	encode_uint (enc, 0x00, (U32)nv);	741	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
320	//TODO: maybe I32?	742	//TODO: maybe I32?
321	else if (ecb_expect_false (nv == (float)nv))	743	else if (ecb_expect_false (nv == (float)nv))
322	{	744	encode_float32 (enc, nv);
323	uint32_t fp = ecb_float_to_binary32 (nv);
324
325	*enc->cur++ = 0xe0 | 26;
326
327	if (!ecb_big_endian ())
328	fp = ecb_bswap32 (fp);
329
330	memcpy (enc->cur, &fp, 4);
331	enc->cur += 4;
332	}
333	else	745	else
334	{	746	encode_float64 (enc, nv);
335	uint64_t fp = ecb_double_to_binary64 (nv);
336
337	*enc->cur++ = 0xe0 | 27;
338
339	if (!ecb_big_endian ())
340	fp = ecb_bswap64 (fp);
341
342	memcpy (enc->cur, &fp, 8);
343	enc->cur += 8;
344	}
345	}	747	}
346		748
347	static void	749	static void
348	encode_sv (enc_t *enc, SV *sv)	750	encode_sv (enc_t *enc, SV *sv)
349	{	751	{
…		…
351		753
352	if (SvPOKp (sv))	754	if (SvPOKp (sv))
353	{	755	{
354	STRLEN len;	756	STRLEN len;
355	char *str = SvPV (sv, len);	757	char *str = SvPV (sv, len);
356	encode_str (enc, SvUTF8 (sv), str, len);	758	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
357	}	759	}
358	else if (SvNOKp (sv))	760	else if (SvNOKp (sv))
359	encode_nv (enc, sv);	761	encode_nv (enc, sv);
360	else if (SvIOKp (sv))	762	else if (SvIOKp (sv))
361	{	763	encode_int (enc, sv);
362	if (SvIsUV (sv))
363	encode_uint (enc, 0x00, SvUVX (sv));
364	else if (SvIVX (sv) >= 0)
365	encode_uint (enc, 0x00, SvIVX (sv));
366	else
367	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
368	}
369	else if (SvROK (sv))	764	else if (SvROK (sv))
370	encode_rv (enc, SvRV (sv));	765	encode_rv (enc, SvRV (sv));
371	else if (!SvOK (sv))	766	else if (!SvOK (sv))
372	encode_ch (enc, 0xe0 | 22);	767	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
373	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	768	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
374	encode_ch (enc, 0xe0 | 23);	769	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
375	else	770	else
376	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",
377	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	772	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
378	}	773	}
379		774
380	static SV *	775	static SV *
381	encode_cbor (SV *scalar, CBOR *cbor)	776	encode_cbor (SV *scalar, CBOR *cbor)
382	{	777	{
383	enc_t enc;	778	enc_t enc = { 0 };
384		779
385	enc.cbor = *cbor;	780	enc.cbor = *cbor;
386	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	781	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
387	enc.cur = SvPVX (enc.sv);	782	enc.cur = SvPVX (enc.sv);
388	enc.end = SvEND (enc.sv);	783	enc.end = SvEND (enc.sv);
389	enc.depth = 0;
390		784
391	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
392	encode_sv (&enc, scalar);	794	encode_sv (&enc, scalar);
393		795
394	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	796	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
395	*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
396		798
…		…
410	U8 *end; // end of input string	812	U8 *end; // end of input string
411	const char *err; // parse error, if != 0	813	const char *err; // parse error, if != 0
412	CBOR cbor;	814	CBOR cbor;
413	U32 depth; // recursion depth	815	U32 depth; // recursion depth
414	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
415	} dec_t;	821	} dec_t;
416		822
417	#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);
418		830
419	#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;
420		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
421	#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)
422	#define DEC_DEC_DEPTH --dec->depth	860	#define DEC_DEC_DEPTH --dec->depth
423		861
424	static UV	862	static UV
425	decode_uint (dec_t *dec)	863	decode_uint (dec_t *dec)
426	{	864	{
427	switch (*dec->cur & 31)	865	U8 m = *dec->cur & MINOR_MASK;
428	{	866	++dec->cur;
429	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
430	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
431	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
432	return *dec->cur++ & 31;
433		867
434	case 24:	868	if (ecb_expect_true (m < LENGTH_EXT1))
		869	return m;
		870	else if (ecb_expect_true (m == LENGTH_EXT1))
		871	{
435	WANT (2);	872	WANT (1);
436	dec->cur += 2;	873	dec->cur += 1;
437	return dec->cur[-1];	874	return dec->cur[-1];
438		875	}
439	case 25:	876	else if (ecb_expect_true (m == LENGTH_EXT2))
		877	{
440	WANT (3);	878	WANT (2);
441	dec->cur += 3;	879	dec->cur += 2;
442	return (((UV)dec->cur[-2]) << 8)	880	return (((UV)dec->cur[-2]) << 8)
443	| ((UV)dec->cur[-1]);	881	| ((UV)dec->cur[-1]);
444		882	}
445	case 26:	883	else if (ecb_expect_true (m == LENGTH_EXT4))
		884	{
446	WANT (5);	885	WANT (4);
447	dec->cur += 5;	886	dec->cur += 4;
448	return (((UV)dec->cur[-4]) << 24)	887	return (((UV)dec->cur[-4]) << 24)
449	| (((UV)dec->cur[-3]) << 16)	888	| (((UV)dec->cur[-3]) << 16)
450	| (((UV)dec->cur[-2]) << 8)	889	| (((UV)dec->cur[-2]) << 8)
451	| ((UV)dec->cur[-1]);	890	| ((UV)dec->cur[-1]);
452		891	}
453	case 27:	892	else if (ecb_expect_true (m == LENGTH_EXT8))
		893	{
454	WANT (9);	894	WANT (8);
455	dec->cur += 9;	895	dec->cur += 8;
		896
		897	return
		898	#if UVSIZE < 8
		899	0
		900	#else
456	return (((UV)dec->cur[-8]) << 56)	901	(((UV)dec->cur[-8]) << 56)
457	| (((UV)dec->cur[-7]) << 48)	902	| (((UV)dec->cur[-7]) << 48)
458	| (((UV)dec->cur[-6]) << 40)	903	| (((UV)dec->cur[-6]) << 40)
459	| (((UV)dec->cur[-5]) << 32)	904	| (((UV)dec->cur[-5]) << 32)
		905	#endif
460	| (((UV)dec->cur[-4]) << 24)	906	| (((UV)dec->cur[-4]) << 24)
461	| (((UV)dec->cur[-3]) << 16)	907	| (((UV)dec->cur[-3]) << 16)
462	| (((UV)dec->cur[-2]) << 8)	908	| (((UV)dec->cur[-2]) << 8)
463	| ((UV)dec->cur[-1]);	909	| ((UV)dec->cur[-1]);
464		910	}
465	default:	911	else
466	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	912	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
467	}
468		913
469	fail:	914	fail:
470	return 0;	915	return 0;
471	}	916	}
472		917
…		…
477	{	922	{
478	AV *av = newAV ();	923	AV *av = newAV ();
479		924
480	DEC_INC_DEPTH;	925	DEC_INC_DEPTH;
481		926
482	if ((*dec->cur & 31) == 31)	927	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
483	{	928	{
484	++dec->cur;	929	++dec->cur;
485		930
486	for (;;)	931	for (;;)
487	{	932	{
488	WANT (1);	933	WANT (1);
489		934
490	if (*dec->cur == (0xe0 | 31))	935	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
491	{	936	{
492	++dec->cur;	937	++dec->cur;
493	break;	938	break;
494	}	939	}
495		940
496	av_push (av, decode_sv (dec));	941	av_push (av, decode_sv (dec));
497	}	942	}
498	}	943	}
499	else	944	else
500	{	945	{
501	int i, len = decode_uint (dec);	946	UV i, len = decode_uint (dec);
502		947
		948	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
503	av_fill (av, len - 1);	949	av_fill (av, len - 1);
504		950
505	for (i = 0; i < len; ++i)	951	for (i = 0; i < len; ++i)
506	AvARRAY (av)[i] = decode_sv (dec);	952	AvARRAY (av)[i] = decode_sv (dec);
507	}	953	}
508		954
509	DEC_DEC_DEPTH;	955	DEC_DEC_DEPTH;
510	return newRV_noinc ((SV *)av);	956	return newRV_noinc ((SV *)av);
511		957
512	fail:	958	fail:
513	SvREFCNT_dec (av);	959	SvREFCNT_dec_NN (av);
514	DEC_DEC_DEPTH;	960	DEC_DEC_DEPTH;
515	return &PL_sv_undef;	961	return &PL_sv_undef;
516	}	962	}
517		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 ((U8 *)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
518	static SV *	1038	static SV *
519	decode_hv (dec_t *dec)	1039	decode_hv (dec_t *dec)
520	{	1040	{
521	HV *hv = newHV ();	1041	HV *hv = newHV ();
522		1042
523	DEC_INC_DEPTH;	1043	DEC_INC_DEPTH;
524		1044
525	if ((*dec->cur & 31) == 31)	1045	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
526	{	1046	{
527	++dec->cur;	1047	++dec->cur;
528		1048
529	for (;;)	1049	for (;;)
530	{	1050	{
531	WANT (1);	1051	WANT (1);
532		1052
533	if (*dec->cur == (0xe0 | 31))	1053	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
534	{	1054	{
535	++dec->cur;	1055	++dec->cur;
536	break;	1056	break;
537	}	1057	}
538		1058
539	SV *k = decode_sv (dec);	1059	decode_he (dec, hv);
540	SV *v = decode_sv (dec);
541
542	hv_store_ent (hv, k, v, 0);
543	}	1060	}
544	}	1061	}
545	else	1062	else
546	{	1063	{
547	int len = decode_uint (dec);	1064	UV pairs = decode_uint (dec);
548		1065
		1066	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1067
549	while (len--)	1068	while (pairs--)
550	{	1069	decode_he (dec, hv);
551	SV *k = decode_sv (dec);
552	SV *v = decode_sv (dec);
553
554	hv_store_ent (hv, k, v, 0);
555	}
556	}	1070	}
557		1071
558	DEC_DEC_DEPTH;	1072	DEC_DEC_DEPTH;
559	return newRV_noinc ((SV *)hv);	1073	return newRV_noinc ((SV *)hv);
560		1074
561	fail:	1075	fail:
562	SvREFCNT_dec (hv);	1076	SvREFCNT_dec_NN (hv);
563	DEC_DEC_DEPTH;	1077	DEC_DEC_DEPTH;
564	return &PL_sv_undef;	1078	return &PL_sv_undef;
565	}	1079	}
566		1080
567	static SV *	1081	static SV *
568	decode_str (dec_t *dec, int utf8)	1082	decode_str (dec_t *dec, int utf8)
569	{	1083	{
570	SV *sv = 0;	1084	SV *sv = 0;
571		1085
572	if ((*dec->cur & 31) == 31)	1086	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
573	{	1087	{
		1088	// indefinite length strings
574	++dec->cur;	1089	++dec->cur;
575		1090
		1091	U8 major = *dec->cur & MAJOR_MISC;
		1092
576	sv = newSVpvn ("", 0);	1093	sv = newSVpvn ("", 0);
577		1094
578	// not very fast, and certainly not robust against illegal input
579	for (;;)	1095	for (;;)
580	{	1096	{
581	WANT (1);	1097	WANT (1);
582		1098
583	if (*dec->cur == (0xe0 | 31))	1099	if ((*dec->cur - major) > LENGTH_EXT8)
		1100	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
584	{	1101	{
585	++dec->cur;	1102	++dec->cur;
586	break;	1103	break;
587	}	1104	}
		1105	else
		1106	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
588		1107
589	sv_catsv (sv, decode_sv (dec));	1108	STRLEN len = decode_uint (dec);
		1109
		1110	WANT (len);
		1111	sv_catpvn (sv, dec->cur, len);
		1112	dec->cur += len;
590	}	1113	}
591	}	1114	}
592	else	1115	else
593	{	1116	{
594	STRLEN len = decode_uint (dec);	1117	STRLEN len = decode_uint (dec);
595		1118
596	WANT (len);	1119	WANT (len);
597	sv = newSVpvn (dec->cur, len);	1120	sv = newSVpvn (dec->cur, len);
598	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));
599	}	1126	}
600		1127
601	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
602	SvUTF8_on (sv);	1134	SvUTF8_on (sv);
		1135	}
603		1136
604	return sv;	1137	return sv;
605		1138
606	fail:	1139	fail:
607	SvREFCNT_dec (sv);	1140	SvREFCNT_dec (sv);
…		…
609	}	1142	}
610		1143
611	static SV *	1144	static SV *
612	decode_tagged (dec_t *dec)	1145	decode_tagged (dec_t *dec)
613	{	1146	{
		1147	SV *sv = 0;
614	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:
615	SV *sv = decode_sv (dec);	1155	sv = decode_sv (dec);
		1156	break;
616		1157
617	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
618	return sv;	1338	return sv;
619		1339
620	AV *av = newAV ();	1340	fail:
621	av_push (av, newSVuv (tag));	1341	SvREFCNT_dec (sv);
622	av_push (av, sv);	1342	return &PL_sv_undef;
623	return newRV_noinc ((SV *)av);
624	}	1343	}
625		1344
626	static SV *	1345	static SV *
627	decode_sv (dec_t *dec)	1346	decode_sv (dec_t *dec)
628	{	1347	{
629	WANT (1);	1348	WANT (1);
630		1349
631	switch (*dec->cur >> 5)	1350	switch (*dec->cur >> MAJOR_SHIFT)
632	{	1351	{
633	case 0: // unsigned int	1352	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
634	return newSVuv (decode_uint (dec));	1353	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
635	case 1: // negative int	1354	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
636	return newSViv (-1 - (IV)decode_uint (dec));	1355	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
637	case 2: // octet string	1356	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
638	return decode_str (dec, 0);	1357	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
639	case 3: // utf-8 string	1358	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
640	return decode_str (dec, 1);	1359
641	case 4: // array	1360	case MAJOR_MISC >> MAJOR_SHIFT:
642	return decode_av (dec);
643	case 5: // map
644	return decode_hv (dec);
645	case 6: // tag
646	return decode_tagged (dec);
647	case 7: // misc
648	switch (*dec->cur++ & 31)	1361	switch (*dec->cur++ & MINOR_MASK)
649	{	1362	{
650	case 20:	1363	case SIMPLE_FALSE:
651	#if CBOR_SLOW	1364	#if CBOR_SLOW
652	cbor_false = get_bool ("CBOR::XS::false");	1365	types_false = get_bool ("Types::Serialiser::false");
653	#endif	1366	#endif
654	return newSVsv (cbor_false);	1367	return newSVsv (types_false);
655	case 21:	1368	case SIMPLE_TRUE:
656	#if CBOR_SLOW	1369	#if CBOR_SLOW
657	cbor_true = get_bool ("CBOR::XS::true");	1370	types_true = get_bool ("Types::Serialiser::true");
658	#endif	1371	#endif
659	return newSVsv (cbor_true);	1372	return newSVsv (types_true);
660	case 22:	1373	case SIMPLE_NULL:
661	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);
662		1380
663	case 25:	1381	case MISC_FLOAT16:
664	{	1382	{
665	WANT (2);	1383	WANT (2);
666		1384
667	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1385	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
668	dec->cur += 2;	1386	dec->cur += 2;
669		1387
670	return newSVnv (ecb_binary16_to_float (fp));	1388	return newSVnv (ecb_binary16_to_float (fp));
671	}	1389	}
672		1390
673	case 26:	1391	case MISC_FLOAT32:
674	{	1392	{
675	uint32_t fp;	1393	uint32_t fp;
676	WANT (4);	1394	WANT (4);
677	memcpy (&fp, dec->cur, 4);	1395	memcpy (&fp, dec->cur, 4);
678	dec->cur += 4;	1396	dec->cur += 4;
…		…
681	fp = ecb_bswap32 (fp);	1399	fp = ecb_bswap32 (fp);
682		1400
683	return newSVnv (ecb_binary32_to_float (fp));	1401	return newSVnv (ecb_binary32_to_float (fp));
684	}	1402	}
685		1403
686	case 27:	1404	case MISC_FLOAT64:
687	{	1405	{
688	uint64_t fp;	1406	uint64_t fp;
689	WANT (8);	1407	WANT (8);
690	memcpy (&fp, dec->cur, 8);	1408	memcpy (&fp, dec->cur, 8);
691	dec->cur += 8;	1409	dec->cur += 8;
…		…
694	fp = ecb_bswap64 (fp);	1412	fp = ecb_bswap64 (fp);
695		1413
696	return newSVnv (ecb_binary64_to_double (fp));	1414	return newSVnv (ecb_binary64_to_double (fp));
697	}	1415	}
698		1416
699	// 0..19 unassigned	1417	// 0..19 unassigned simple
700	// 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
701	default:	1421	default:
702	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1422	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
703	}	1423	}
704		1424
705	break;	1425	break;
706	}	1426	}
707		1427
…		…
710	}	1430	}
711		1431
712	static SV *	1432	static SV *
713	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1433	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
714	{	1434	{
715	dec_t dec;	1435	dec_t dec = { 0 };
716	SV *sv;	1436	SV *sv;
		1437	STRLEN len;
		1438	char *data = SvPVbyte (string, len);
717		1439
718	/* work around bugs in 5.10 where manipulating magic values
719	* makes perl ignore the magic in subsequent accesses.
720	* also make a copy of non-PV values, to get them into a clean
721	* state (SvPV should do that, but it's buggy, see below).
722	*/
723	/*SvGETMAGIC (string);*/
724	if (SvMAGICAL (string) || !SvPOK (string))
725	string = sv_2mortal (newSVsv (string));
726
727	SvUPGRADE (string, SVt_PV);
728
729	/* work around a bug in perl 5.10, which causes SvCUR to fail an
730	* assertion with -DDEBUGGING, although SvCUR is documented to
731	* return the xpv_cur field which certainly exists after upgrading.
732	* according to nicholas clark, calling SvPOK fixes this.
733	* But it doesn't fix it, so try another workaround, call SvPV_nolen
734	* and hope for the best.
735	* Damnit, SvPV_nolen still trips over yet another assertion. This
736	* assertion business is seriously broken, try yet another workaround
737	* for the broken -DDEBUGGING.
738	*/
739	{
740	#ifdef DEBUGGING
741	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
742	#else
743	STRLEN offset = SvCUR (string);
744	#endif
745
746	if (offset > cbor->max_size && cbor->max_size)	1440	if (len > cbor->max_size && cbor->max_size)
747	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",
748	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1442	(unsigned long)len, (unsigned long)cbor->max_size);
749	}
750
751	sv_utf8_downgrade (string, 0);
752		1443
753	dec.cbor = *cbor;	1444	dec.cbor = *cbor;
754	dec.cur = (U8 *)SvPVX (string);	1445	dec.cur = (U8 *)data;
755	dec.end = (U8 *)SvEND (string);	1446	dec.end = (U8 *)data + len;
756	dec.err = 0;
757	dec.depth = 0;
758		1447
759	sv = decode_sv (&dec);	1448	sv = decode_sv (&dec);
760		1449
761	if (offset_return)	1450	if (offset_return)
762	*offset_return = dec.cur;	1451	*offset_return = dec.cur;
…		…
765	if (dec.cur != dec.end && !dec.err)	1454	if (dec.cur != dec.end && !dec.err)
766	dec.err = "garbage after CBOR object";	1455	dec.err = "garbage after CBOR object";
767		1456
768	if (dec.err)	1457	if (dec.err)
769	{	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
770	SvREFCNT_dec (sv);	1470	SvREFCNT_dec_NN (sv);
		1471
		1472	if (dec.err_sv)
		1473	sv_2mortal (dec.err_sv);
		1474
771	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);
772	}	1476	}
773		1477
774	sv = sv_2mortal (sv);	1478	sv = sv_2mortal (sv);
775		1479
776	return sv;	1480	return sv;
777	}	1481	}
778		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	/* FALLTHROUGH */
		1575	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1576	if (len)
		1577	{
		1578	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1579	count = len + 1;
		1580	}
		1581	break;
		1582	}
		1583	}
		1584	}
		1585	}
		1586
		1587	self->incr_pos = self->incr_need;
		1588
		1589	if (count > 0)
		1590	{
		1591	while (!--count)
		1592	{
		1593	if (!AvFILLp (self->incr_count))
		1594	return 1; // done
		1595
		1596	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1597	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1598	}
		1599
		1600	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1601	}
		1602	}
		1603
		1604	return 0;
		1605	}
		1606
		1607
779	/////////////////////////////////////////////////////////////////////////////	1608	/////////////////////////////////////////////////////////////////////////////
780	// XS interface functions	1609	// XS interface functions
781		1610
782	MODULE = CBOR::XS PACKAGE = CBOR::XS	1611	MODULE = CBOR::XS PACKAGE = CBOR::XS
783		1612
784	BOOT:	1613	BOOT:
785	{	1614	{
786	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1615	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
787	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);
788	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);	1616	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
789		1617
790	cbor_true = get_bool ("CBOR::XS::true");	1618	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
791	cbor_false = get_bool ("CBOR::XS::false");	1619	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1620
		1621	types_true = get_bool ("Types::Serialiser::true" );
		1622	types_false = get_bool ("Types::Serialiser::false");
		1623	types_error = get_bool ("Types::Serialiser::error");
		1624
		1625	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1626
		1627	sv_cbor = newSVpv ("CBOR", 0);
		1628	SvREADONLY_on (sv_cbor);
		1629
		1630	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
792	}	1631	}
793		1632
794	PROTOTYPES: DISABLE	1633	PROTOTYPES: DISABLE
795		1634
796	void CLONE (...)	1635	void CLONE (...)
797	CODE:	1636	CODE:
798	cbor_stash = 0;	1637	cbor_stash = 0;
799	cbor_boolean_stash = 0;
800	cbor_tagged_stash = 0;	1638	cbor_tagged_stash = 0;
		1639	types_error_stash = 0;
		1640	types_boolean_stash = 0;
801		1641
802	void new (char *klass)	1642	void new (char *klass)
803	PPCODE:	1643	PPCODE:
804	{	1644	{
805	SV *pv = NEWSV (0, sizeof (CBOR));	1645	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
813		1653
814	void shrink (CBOR *self, int enable = 1)	1654	void shrink (CBOR *self, int enable = 1)
815	ALIAS:	1655	ALIAS:
816	shrink = F_SHRINK	1656	shrink = F_SHRINK
817	allow_unknown = F_ALLOW_UNKNOWN	1657	allow_unknown = F_ALLOW_UNKNOWN
		1658	allow_sharing = F_ALLOW_SHARING
		1659	allow_cycles = F_ALLOW_CYCLES
		1660	forbid_objects = F_FORBID_OBJECTS
		1661	pack_strings = F_PACK_STRINGS
		1662	text_keys = F_TEXT_KEYS
		1663	text_strings = F_TEXT_STRINGS
		1664	validate_utf8 = F_VALIDATE_UTF8
818	PPCODE:	1665	PPCODE:
819	{	1666	{
820	if (enable)	1667	if (enable)
821	self->flags |= ix;	1668	self->flags |= ix;
822	else	1669	else
…		…
827		1674
828	void get_shrink (CBOR *self)	1675	void get_shrink (CBOR *self)
829	ALIAS:	1676	ALIAS:
830	get_shrink = F_SHRINK	1677	get_shrink = F_SHRINK
831	get_allow_unknown = F_ALLOW_UNKNOWN	1678	get_allow_unknown = F_ALLOW_UNKNOWN
		1679	get_allow_sharing = F_ALLOW_SHARING
		1680	get_allow_cycles = F_ALLOW_CYCLES
		1681	get_forbid_objects = F_FORBID_OBJECTS
		1682	get_pack_strings = F_PACK_STRINGS
		1683	get_text_keys = F_TEXT_KEYS
		1684	get_text_strings = F_TEXT_STRINGS
		1685	get_validate_utf8 = F_VALIDATE_UTF8
832	PPCODE:	1686	PPCODE:
833	XPUSHs (boolSV (self->flags & ix));	1687	XPUSHs (boolSV (self->flags & ix));
834		1688
835	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1689	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
836	PPCODE:	1690	PPCODE:
…		…
852	CODE:	1706	CODE:
853	RETVAL = self->max_size;	1707	RETVAL = self->max_size;
854	OUTPUT:	1708	OUTPUT:
855	RETVAL	1709	RETVAL
856		1710
857	#if 0 //TODO	1711	void filter (CBOR *self, SV *filter = 0)
858
859	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
860	PPCODE:	1712	PPCODE:
861	{
862	SvREFCNT_dec (self->cb_object);	1713	SvREFCNT_dec (self->filter);
863	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1714	self->filter = filter ? newSVsv (filter) : filter;
864
865	XPUSHs (ST (0));	1715	XPUSHs (ST (0));
866	}
867		1716
868	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1717	SV *get_filter (CBOR *self)
869	PPCODE:	1718	CODE:
870	{	1719	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
871	if (!self->cb_sk_object)	1720	OUTPUT:
872	self->cb_sk_object = newHV ();	1721	RETVAL
873
874	if (SvOK (cb))
875	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
876	else
877	{
878	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
879
880	if (!HvKEYS (self->cb_sk_object))
881	{
882	SvREFCNT_dec (self->cb_sk_object);
883	self->cb_sk_object = 0;
884	}
885	}
886
887	XPUSHs (ST (0));
888	}
889
890	#endif
891		1722
892	void encode (CBOR *self, SV *scalar)	1723	void encode (CBOR *self, SV *scalar)
893	PPCODE:	1724	PPCODE:
894	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1725	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
895	XPUSHs (scalar);	1726	XPUSHs (scalar);
…		…
908	EXTEND (SP, 2);	1739	EXTEND (SP, 2);
909	PUSHs (sv);	1740	PUSHs (sv);
910	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1741	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
911	}	1742	}
912		1743
913	#if 0	1744	void incr_parse (CBOR *self, SV *cborstr)
		1745	ALIAS:
		1746	incr_parse_multiple = 1
		1747	PPCODE:
		1748	{
		1749	if (SvUTF8 (cborstr))
		1750	sv_utf8_downgrade (cborstr, 0);
		1751
		1752	if (!self->incr_count)
		1753	{
		1754	self->incr_count = newAV ();
		1755	self->incr_pos = 0;
		1756	self->incr_need = 1;
		1757
		1758	av_push (self->incr_count, newSViv (1));
		1759	}
		1760
		1761	do
		1762	{
		1763	if (!incr_parse (self, cborstr))
		1764	{
		1765	if (self->incr_need > self->max_size && self->max_size)
		1766	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1767	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1768
		1769	break;
		1770	}
		1771
		1772	SV *sv;
		1773	char *offset;
		1774
		1775	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1776	XPUSHs (sv);
		1777
		1778	sv_chop (cborstr, offset);
		1779
		1780	av_clear (self->incr_count);
		1781	av_push (self->incr_count, newSViv (1));
		1782
		1783	self->incr_pos = 0;
		1784	self->incr_need = self->incr_pos + 1;
		1785	}
		1786	while (ix);
		1787	}
		1788
		1789	void incr_reset (CBOR *self)
		1790	CODE:
		1791	{
		1792	SvREFCNT_dec (self->incr_count);
		1793	self->incr_count = 0;
		1794	}
914		1795
915	void DESTROY (CBOR *self)	1796	void DESTROY (CBOR *self)
916	CODE:	1797	PPCODE:
917	SvREFCNT_dec (self->cb_sk_object);	1798	cbor_free (self);
918	SvREFCNT_dec (self->cb_object);
919
920	#endif
921		1799
922	PROTOTYPES: ENABLE	1800	PROTOTYPES: ENABLE
923		1801
924	void encode_cbor (SV *scalar)	1802	void encode_cbor (SV *scalar)
		1803	ALIAS:
		1804	encode_cbor = 0
		1805	encode_cbor_sharing = F_ALLOW_SHARING
925	PPCODE:	1806	PPCODE:
926	{	1807	{
927	CBOR cbor;	1808	CBOR cbor;
928	cbor_init (&cbor);	1809	cbor_init (&cbor);
		1810	cbor.flags |= ix;
929	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1811	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
930	XPUSHs (scalar);	1812	XPUSHs (scalar);
931	}	1813	}
932		1814
933	void decode_cbor (SV *cborstr)	1815	void decode_cbor (SV *cborstr)
…		…
937	cbor_init (&cbor);	1819	cbor_init (&cbor);
938	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1820	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
939	XPUSHs (cborstr);	1821	XPUSHs (cborstr);
940	}	1822	}
941		1823
		1824	#ifdef __AFL_COMPILER
		1825
		1826	void
		1827	afl_init ()
		1828	CODE:
		1829	__AFL_INIT ();
		1830
		1831	int
		1832	afl_loop (unsigned int count = 10000)
		1833	CODE:
		1834	RETVAL = __AFL_LOOP (count);
		1835	OUTPUT:
		1836	RETVAL
		1837
		1838	#endif
		1839

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