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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.16 by root, Tue Oct 29 20:59:16 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
14	// compatibility with perl <5.18	16	// compatibility with perl <5.18
15	#ifndef HvNAMELEN_get	17	#ifndef HvNAMELEN_get
16	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))	18	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
…		…
19	# define HvNAMELEN(hv) HvNAMELEN_get (hv)	21	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
20	#endif	22	#endif
21	#ifndef HvNAMEUTF8	23	#ifndef HvNAMEUTF8
22	# define HvNAMEUTF8(hv) 0	24	# define HvNAMEUTF8(hv) 0
23	#endif	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	};
24		69
25	// known tags	70	// known tags
26	enum cbor_tag	71	enum cbor_tag
27	{	72	{
28	// inofficial extensions (pending iana registration)	73	// extensions
29	CBOR_TAG_PERL_OBJECT = 256,	74	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
30	CBOR_TAG_GENERIC_OBJECT = 257,	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
31		81
32	// rfc7049	82	// rfc7049
33	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	83	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
34	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	84	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
35	CBOR_TAG_POS_BIGNUM = 2, // byte string	85	CBOR_TAG_POS_BIGNUM = 2, // byte string
36	CBOR_TAG_NEG_BIGNUM = 3, // byte string	86	CBOR_TAG_NEG_BIGNUM = 3, // byte string
37	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	87	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
38	CBOR_TAG_BIGFLOAT = 5, // array	88	CBOR_TAG_BIGFLOAT = 5, // array
39		89
40	CBOR_TAG_CONV_B64U = 21, // base64url, any	90	CBOR_TAG_CONV_B64U = 21, // base64url, any
41	CBOR_TAG_CONV_B64 = 22, // base64, any	91	CBOR_TAG_CONV_B64 = 22, // base64, any
42	CBOR_TAG_CONV_HEX = 23, // base16, any	92	CBOR_TAG_CONV_HEX = 23, // base16, any
43	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	93	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
44		94
45	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	95	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
46	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	96	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
47	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	97	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
48	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	98	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
49	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	99	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
50		100
51	CBOR_TAG_MAGIC = 55799 // self-describe cbor	101	CBOR_TAG_MAGIC = 55799, // self-describe cbor
52	};	102	};
53		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
54	#define F_SHRINK 0x00000200UL	118	#define F_SHRINK 0x00000001UL
55	#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
56		127
57	#define INIT_SIZE 32 // initial scalar size to be allocated	128	#define INIT_SIZE 32 // initial scalar size to be allocated
58		129
59	#define SB do {	130	#define SB do {
60	#define SE } while (0)	131	#define SE } while (0)
…		…
72	# define CBOR_SLOW 0	143	# define CBOR_SLOW 0
73	# define CBOR_STASH cbor_stash	144	# define CBOR_STASH cbor_stash
74	#endif	145	#endif
75		146
76	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::	147	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
77	static SV *types_true, *types_false, *types_error, *sv_cbor;	148	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
78		149
79	typedef struct {	150	typedef struct {
80	U32 flags;	151	U32 flags;
81	U32 max_depth;	152	U32 max_depth;
82	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.
83	} CBOR;	160	} CBOR;
84		161
85	ecb_inline void	162	ecb_inline void
86	cbor_init (CBOR *cbor)	163	cbor_init (CBOR *cbor)
87	{	164	{
88	Zero (cbor, 1, CBOR);	165	Zero (cbor, 1, CBOR);
89	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);
90	}	174	}
91		175
92	/////////////////////////////////////////////////////////////////////////////	176	/////////////////////////////////////////////////////////////////////////////
93	// utility functions	177	// utility functions
94		178
…		…
116	SvPV_renew (sv, SvCUR (sv) + 1);	200	SvPV_renew (sv, SvCUR (sv) + 1);
117	#endif	201	#endif
118	}	202	}
119	}	203	}
120		204
121	/////////////////////////////////////////////////////////////////////////////	205	// minimum length of a string to be registered for stringref
122	// fp hell	206	ecb_inline int
123		207	minimum_string_length (UV idx)
124	//TODO	208	{
		209	return idx <= 23 ? 3
		210	: idx <= 0xffU ? 4
		211	: idx <= 0xffffU ? 5
		212	: idx <= 0xffffffffU ? 7
		213	: 11;
		214	}
125		215
126	/////////////////////////////////////////////////////////////////////////////	216	/////////////////////////////////////////////////////////////////////////////
127	// encoder	217	// encoder
128		218
129	// structure used for encoding CBOR	219	// structure used for encoding CBOR
…		…
132	char *cur; // SvPVX (sv) + current output position	222	char *cur; // SvPVX (sv) + current output position
133	char *end; // SvEND (sv)	223	char *end; // SvEND (sv)
134	SV *sv; // result scalar	224	SV *sv; // result scalar
135	CBOR cbor;	225	CBOR cbor;
136	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;
137	} enc_t;	231	} enc_t;
138		232
139	ecb_inline void	233	ecb_inline void
140	need (enc_t *enc, STRLEN len)	234	need (enc_t *enc, STRLEN len)
141	{	235	{
142	if (ecb_expect_false (enc->cur + len >= enc->end))	236	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
143	{	237	{
144	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	238	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
145	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	239	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
146	enc->cur = SvPVX (enc->sv) + cur;	240	enc->cur = SvPVX (enc->sv) + cur;
147	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	241	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
148	}	242	}
149	}	243	}
150		244
		245	static void encode_sv (enc_t *enc, SV *sv);
		246
151	ecb_inline void	247	ecb_inline void
152	encode_ch (enc_t *enc, char ch)	248	encode_ch (enc_t *enc, char ch)
153	{	249	{
154	need (enc, 1);	250	need (enc, 1);
155	*enc->cur++ = ch;	251	*enc->cur++ = ch;
156	}	252	}
157		253
		254	// used for tags, intregers, element counts and so on
158	static void	255	static void
159	encode_uint (enc_t *enc, int major, UV len)	256	encode_uint (enc_t *enc, int major, UV len)
160	{	257	{
161	need (enc, 9);	258	need (enc, 9);
162		259
163	if (len < 24)	260	if (ecb_expect_true (len < LENGTH_EXT1))
164	*enc->cur++ = major | len;	261	*enc->cur++ = major | len;
165	else if (len <= 0xff)	262	else if (ecb_expect_true (len <= 0xffU))
166	{	263	{
167	*enc->cur++ = major | 24;	264	*enc->cur++ = major | LENGTH_EXT1;
168	*enc->cur++ = len;	265	*enc->cur++ = len;
169	}	266	}
170	else if (len <= 0xffff)	267	else if (len <= 0xffffU)
171	{	268	{
172	*enc->cur++ = major | 25;	269	*enc->cur++ = major | LENGTH_EXT2;
173	*enc->cur++ = len >> 8;	270	*enc->cur++ = len >> 8;
174	*enc->cur++ = len;	271	*enc->cur++ = len;
175	}	272	}
176	else if (len <= 0xffffffff)	273	else if (len <= 0xffffffffU)
177	{	274	{
178	*enc->cur++ = major | 26;	275	*enc->cur++ = major | LENGTH_EXT4;
179	*enc->cur++ = len >> 24;	276	*enc->cur++ = len >> 24;
180	*enc->cur++ = len >> 16;	277	*enc->cur++ = len >> 16;
181	*enc->cur++ = len >> 8;	278	*enc->cur++ = len >> 8;
182	*enc->cur++ = len;	279	*enc->cur++ = len;
183	}	280	}
184	else	281	else
185	{	282	{
186	*enc->cur++ = major | 27;	283	*enc->cur++ = major | LENGTH_EXT8;
187	*enc->cur++ = len >> 56;	284	*enc->cur++ = len >> 56;
188	*enc->cur++ = len >> 48;	285	*enc->cur++ = len >> 48;
189	*enc->cur++ = len >> 40;	286	*enc->cur++ = len >> 40;
190	*enc->cur++ = len >> 32;	287	*enc->cur++ = len >> 32;
191	*enc->cur++ = len >> 24;	288	*enc->cur++ = len >> 24;
…		…
193	*enc->cur++ = len >> 8;	290	*enc->cur++ = len >> 8;
194	*enc->cur++ = len;	291	*enc->cur++ = len;
195	}	292	}
196	}	293	}
197		294
198	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
199	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	315	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
200	{	316	{
201	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);
202	need (enc, len);	347	need (enc, len);
203	memcpy (enc->cur, str, len);	348	memcpy (enc->cur, str, len);
204	enc->cur += len;	349	enc->cur += len;
205	}	350	}
206		351
207	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	}
208		507
209	static void	508	static void
210	encode_av (enc_t *enc, AV *av)	509	encode_av (enc_t *enc, AV *av)
211	{	510	{
212	int i, len = av_len (av);	511	int i, len = av_len (av);
…		…
214	if (enc->depth >= enc->cbor.max_depth)	513	if (enc->depth >= enc->cbor.max_depth)
215	croak (ERR_NESTING_EXCEEDED);	514	croak (ERR_NESTING_EXCEEDED);
216		515
217	++enc->depth;	516	++enc->depth;
218		517
219	encode_uint (enc, 0x80, len + 1);	518	encode_uint (enc, MAJOR_ARRAY, len + 1);
220		519
		520	if (ecb_expect_false (SvMAGICAL (av)))
221	for (i = 0; i <= len; ++i)	521	for (i = 0; i <= len; ++i)
222	{	522	{
223	SV **svp = av_fetch (av, i, 0);	523	SV **svp = av_fetch (av, i, 0);
224	encode_sv (enc, svp ? *svp : &PL_sv_undef);	524	encode_sv (enc, svp ? *svp : &PL_sv_undef);
225	}	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	}
226		532
227	--enc->depth;	533	--enc->depth;
228	}	534	}
229		535
230	static void	536	static void
…		…
238	++enc->depth;	544	++enc->depth;
239		545
240	int pairs = hv_iterinit (hv);	546	int pairs = hv_iterinit (hv);
241	int mg = SvMAGICAL (hv);	547	int mg = SvMAGICAL (hv);
242		548
243	if (mg)	549	if (ecb_expect_false (mg))
244	encode_ch (enc, 0xa0 | 31);	550	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
245	else	551	else
246	encode_uint (enc, 0xa0, pairs);	552	encode_uint (enc, MAJOR_MAP, pairs);
247		553
248	while ((he = hv_iternext (hv)))	554	while ((he = hv_iternext (hv)))
249	{	555	{
250	if (HeKLEN (he) == HEf_SVKEY)	556	if (HeKLEN (he) == HEf_SVKEY)
251	encode_sv (enc, HeSVKEY (he));	557	encode_sv (enc, HeSVKEY (he));
252	else	558	else
253	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));
254		560
255	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));
256	}	562	}
257		563
258	if (mg)	564	if (ecb_expect_false (mg))
259	encode_ch (enc, 0xe0 | 31);	565	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
260		566
261	--enc->depth;	567	--enc->depth;
262	}	568	}
263		569
264	// encode objects, arrays and special \0=false and \1=true values.	570	// encode objects, arrays and special \0=false and \1=true values.
265	static void	571	static void
266	encode_rv (enc_t *enc, SV *sv)	572	encode_rv (enc_t *enc, SV *sv)
267	{	573	{
268	svtype svt;
269
270	SvGETMAGIC (sv);	574	SvGETMAGIC (sv);
		575
271	svt = SvTYPE (sv);	576	svtype svt = SvTYPE (sv);
272		577
273	if (ecb_expect_false (SvOBJECT (sv)))	578	if (ecb_expect_false (SvOBJECT (sv)))
274	{	579	{
275	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash	580	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
276	? types_boolean_stash	581	? types_boolean_stash
…		…
281	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	586	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
282	? cbor_tagged_stash	587	? cbor_tagged_stash
283	: gv_stashpv ("CBOR::XS::Tagged" , 1);	588	: gv_stashpv ("CBOR::XS::Tagged" , 1);
284		589
285	HV *stash = SvSTASH (sv);	590	HV *stash = SvSTASH (sv);
286	GV *method;
287		591
288	if (stash == boolean_stash)	592	if (stash == boolean_stash)
289	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	593	{
		594	encode_bool (enc, SvIV (sv));
		595	return;
		596	}
290	else if (stash == error_stash)	597	else if (stash == error_stash)
291	encode_ch (enc, 0xe0 | 23);	598	{
		599	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		600	return;
		601	}
292	else if (stash == tagged_stash)	602	else if (stash == tagged_stash)
293	{	603	{
294	if (svt != SVt_PVAV)	604	if (svt != SVt_PVAV)
295	croak ("encountered CBOR::XS::Tagged object that isn't an array");	605	croak ("encountered CBOR::XS::Tagged object that isn't an array");
296		606
		607	switch (av_len ((AV *)sv))
		608	{
		609	case 2-1:
		610	// actually a tagged value
297	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	611	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
298	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))
299	}	637	{
		638	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		639	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		640	return;
		641	}
		642	else
		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))));
300	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))	658	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
301	{	659	{
302	dSP;	660	dSP;
303		661
304	ENTER; SAVETMPS; PUSHMARK (SP);	662	ENTER; SAVETMPS;
		663	PUSHMARK (SP);
305	// 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
306	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	665	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
307		666
308	PUTBACK;	667	PUTBACK;
309	// G_SCALAR ensures that return value is 1	668	// G_SCALAR ensures that return value is 1
…		…
322	}	681	}
323	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)	682	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
324	{	683	{
325	dSP;	684	dSP;
326		685
327	ENTER; SAVETMPS; PUSHMARK (SP);	686	ENTER; SAVETMPS;
		687	PUSHMARK (SP);
328	EXTEND (SP, 2);	688	EXTEND (SP, 2);
329	// we re-bless the reference to get overload and other niceties right	689	// we re-bless the reference to get overload and other niceties right
330	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	690	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
331	PUSHs (sv_cbor);	691	PUSHs (sv_cbor);
332		692
…		…
336		696
337	// catch this surprisingly common error	697	// catch this surprisingly common error
338	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)	698	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
339	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));	699	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
340		700
341	encode_uint (enc, 0xc0, CBOR_TAG_PERL_OBJECT);	701	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
342	encode_uint (enc, 0x80, count + 1);	702	encode_uint (enc, MAJOR_ARRAY, count + 1);
343	encode_str (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));	703	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
344		704
345	while (count)	705	{
		706	int i;
		707
		708	for (i = 0; i < count; ++i)
346	encode_sv (enc, SP[1 - count--]);	709	encode_sv (enc, SP[i + 1 - count]);
		710
		711	SP -= count;
		712	}
347		713
348	PUTBACK;	714	PUTBACK;
349		715
350	FREETMPS; LEAVE;	716	FREETMPS; LEAVE;
351	}	717	}
…		…
355	}	721	}
356	else if (svt == SVt_PVHV)	722	else if (svt == SVt_PVHV)
357	encode_hv (enc, (HV *)sv);	723	encode_hv (enc, (HV *)sv);
358	else if (svt == SVt_PVAV)	724	else if (svt == SVt_PVAV)
359	encode_av (enc, (AV *)sv);	725	encode_av (enc, (AV *)sv);
360	else if (svt < SVt_PVAV)
361	{
362	STRLEN len = 0;
363	char *pv = svt ? SvPV (sv, len) : 0;
364
365	if (len == 1 && *pv == '1')
366	encode_ch (enc, 0xe0 | 21);
367	else if (len == 1 && *pv == '0')
368	encode_ch (enc, 0xe0 | 20);
369	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
370	encode_ch (enc, 0xe0 | 23);
371	else
372	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
373	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
374	}
375	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
376	encode_ch (enc, 0xe0 | 23);
377	else	726	else
378	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	727	{
379	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	728	encode_tag (enc, CBOR_TAG_INDIRECTION);
		729	encode_sv (enc, sv);
		730	}
380	}	731	}
381		732
382	static void	733	static void
383	encode_nv (enc_t *enc, SV *sv)	734	encode_nv (enc_t *enc, SV *sv)
384	{	735	{
385	double nv = SvNVX (sv);	736	double nv = SvNVX (sv);
386		737
387	need (enc, 9);	738	need (enc, 9);
388		739
389	if (ecb_expect_false (nv == (U32)nv))	740	if (ecb_expect_false (nv == (NV)(U32)nv))
390	encode_uint (enc, 0x00, (U32)nv);	741	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
391	//TODO: maybe I32?	742	//TODO: maybe I32?
392	else if (ecb_expect_false (nv == (float)nv))	743	else if (ecb_expect_false (nv == (float)nv))
393	{	744	encode_float32 (enc, nv);
394	uint32_t fp = ecb_float_to_binary32 (nv);
395
396	*enc->cur++ = 0xe0 | 26;
397
398	if (!ecb_big_endian ())
399	fp = ecb_bswap32 (fp);
400
401	memcpy (enc->cur, &fp, 4);
402	enc->cur += 4;
403	}
404	else	745	else
405	{	746	encode_float64 (enc, nv);
406	uint64_t fp = ecb_double_to_binary64 (nv);
407
408	*enc->cur++ = 0xe0 | 27;
409
410	if (!ecb_big_endian ())
411	fp = ecb_bswap64 (fp);
412
413	memcpy (enc->cur, &fp, 8);
414	enc->cur += 8;
415	}
416	}	747	}
417		748
418	static void	749	static void
419	encode_sv (enc_t *enc, SV *sv)	750	encode_sv (enc_t *enc, SV *sv)
420	{	751	{
…		…
422		753
423	if (SvPOKp (sv))	754	if (SvPOKp (sv))
424	{	755	{
425	STRLEN len;	756	STRLEN len;
426	char *str = SvPV (sv, len);	757	char *str = SvPV (sv, len);
427	encode_str (enc, SvUTF8 (sv), str, len);	758	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
428	}	759	}
429	else if (SvNOKp (sv))	760	else if (SvNOKp (sv))
430	encode_nv (enc, sv);	761	encode_nv (enc, sv);
431	else if (SvIOKp (sv))	762	else if (SvIOKp (sv))
432	{	763	encode_int (enc, sv);
433	if (SvIsUV (sv))
434	encode_uint (enc, 0x00, SvUVX (sv));
435	else if (SvIVX (sv) >= 0)
436	encode_uint (enc, 0x00, SvIVX (sv));
437	else
438	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
439	}
440	else if (SvROK (sv))	764	else if (SvROK (sv))
441	encode_rv (enc, SvRV (sv));	765	encode_rv (enc, SvRV (sv));
442	else if (!SvOK (sv))	766	else if (!SvOK (sv))
443	encode_ch (enc, 0xe0 | 22);	767	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
444	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	768	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
445	encode_ch (enc, 0xe0 | 23);	769	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
446	else	770	else
447	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",
448	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	772	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
449	}	773	}
450		774
451	static SV *	775	static SV *
452	encode_cbor (SV *scalar, CBOR *cbor)	776	encode_cbor (SV *scalar, CBOR *cbor)
453	{	777	{
454	enc_t enc;	778	enc_t enc = { 0 };
455		779
456	enc.cbor = *cbor;	780	enc.cbor = *cbor;
457	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	781	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
458	enc.cur = SvPVX (enc.sv);	782	enc.cur = SvPVX (enc.sv);
459	enc.end = SvEND (enc.sv);	783	enc.end = SvEND (enc.sv);
460	enc.depth = 0;
461		784
462	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
463	encode_sv (&enc, scalar);	794	encode_sv (&enc, scalar);
464		795
465	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	796	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
466	*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
467		798
…		…
481	U8 *end; // end of input string	812	U8 *end; // end of input string
482	const char *err; // parse error, if != 0	813	const char *err; // parse error, if != 0
483	CBOR cbor;	814	CBOR cbor;
484	U32 depth; // recursion depth	815	U32 depth; // recursion depth
485	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
486	} dec_t;	821	} dec_t;
487		822
488	#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);
489		830
490	#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;
491		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
492	#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)
493	#define DEC_DEC_DEPTH --dec->depth	860	#define DEC_DEC_DEPTH --dec->depth
494		861
495	static UV	862	static UV
496	decode_uint (dec_t *dec)	863	decode_uint (dec_t *dec)
497	{	864	{
498	switch (*dec->cur & 31)	865	U8 m = *dec->cur & MINOR_MASK;
499	{	866	++dec->cur;
500	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
501	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
502	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
503	return *dec->cur++ & 31;
504		867
505	case 24:	868	if (ecb_expect_true (m < LENGTH_EXT1))
		869	return m;
		870	else if (ecb_expect_true (m == LENGTH_EXT1))
		871	{
506	WANT (2);	872	WANT (1);
507	dec->cur += 2;	873	dec->cur += 1;
508	return dec->cur[-1];	874	return dec->cur[-1];
509		875	}
510	case 25:	876	else if (ecb_expect_true (m == LENGTH_EXT2))
		877	{
511	WANT (3);	878	WANT (2);
512	dec->cur += 3;	879	dec->cur += 2;
513	return (((UV)dec->cur[-2]) << 8)	880	return (((UV)dec->cur[-2]) << 8)
514	| ((UV)dec->cur[-1]);	881	| ((UV)dec->cur[-1]);
515		882	}
516	case 26:	883	else if (ecb_expect_true (m == LENGTH_EXT4))
		884	{
517	WANT (5);	885	WANT (4);
518	dec->cur += 5;	886	dec->cur += 4;
519	return (((UV)dec->cur[-4]) << 24)	887	return (((UV)dec->cur[-4]) << 24)
520	| (((UV)dec->cur[-3]) << 16)	888	| (((UV)dec->cur[-3]) << 16)
521	| (((UV)dec->cur[-2]) << 8)	889	| (((UV)dec->cur[-2]) << 8)
522	| ((UV)dec->cur[-1]);	890	| ((UV)dec->cur[-1]);
523		891	}
524	case 27:	892	else if (ecb_expect_true (m == LENGTH_EXT8))
		893	{
525	WANT (9);	894	WANT (8);
526	dec->cur += 9;	895	dec->cur += 8;
		896
		897	return
		898	#if UVSIZE < 8
		899	0
		900	#else
527	return (((UV)dec->cur[-8]) << 56)	901	(((UV)dec->cur[-8]) << 56)
528	| (((UV)dec->cur[-7]) << 48)	902	| (((UV)dec->cur[-7]) << 48)
529	| (((UV)dec->cur[-6]) << 40)	903	| (((UV)dec->cur[-6]) << 40)
530	| (((UV)dec->cur[-5]) << 32)	904	| (((UV)dec->cur[-5]) << 32)
		905	#endif
531	| (((UV)dec->cur[-4]) << 24)	906	| (((UV)dec->cur[-4]) << 24)
532	| (((UV)dec->cur[-3]) << 16)	907	| (((UV)dec->cur[-3]) << 16)
533	| (((UV)dec->cur[-2]) << 8)	908	| (((UV)dec->cur[-2]) << 8)
534	| ((UV)dec->cur[-1]);	909	| ((UV)dec->cur[-1]);
535		910	}
536	default:	911	else
537	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	912	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
538	}
539		913
540	fail:	914	fail:
541	return 0;	915	return 0;
542	}	916	}
543		917
…		…
548	{	922	{
549	AV *av = newAV ();	923	AV *av = newAV ();
550		924
551	DEC_INC_DEPTH;	925	DEC_INC_DEPTH;
552		926
553	if ((*dec->cur & 31) == 31)	927	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
554	{	928	{
555	++dec->cur;	929	++dec->cur;
556		930
557	for (;;)	931	for (;;)
558	{	932	{
559	WANT (1);	933	WANT (1);
560		934
561	if (*dec->cur == (0xe0 | 31))	935	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
562	{	936	{
563	++dec->cur;	937	++dec->cur;
564	break;	938	break;
565	}	939	}
566		940
567	av_push (av, decode_sv (dec));	941	av_push (av, decode_sv (dec));
568	}	942	}
569	}	943	}
570	else	944	else
571	{	945	{
572	int i, len = decode_uint (dec);	946	UV i, len = decode_uint (dec);
573		947
		948	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
574	av_fill (av, len - 1);	949	av_fill (av, len - 1);
575		950
576	for (i = 0; i < len; ++i)	951	for (i = 0; i < len; ++i)
577	AvARRAY (av)[i] = decode_sv (dec);	952	AvARRAY (av)[i] = decode_sv (dec);
578	}	953	}
579		954
580	DEC_DEC_DEPTH;	955	DEC_DEC_DEPTH;
581	return newRV_noinc ((SV *)av);	956	return newRV_noinc ((SV *)av);
582		957
583	fail:	958	fail:
584	SvREFCNT_dec (av);	959	SvREFCNT_dec_NN (av);
585	DEC_DEC_DEPTH;	960	DEC_DEC_DEPTH;
586	return &PL_sv_undef;	961	return &PL_sv_undef;
587	}	962	}
588		963
589	static void	964	static void
590	decode_he (dec_t *dec, HV *hv)	965	decode_he (dec_t *dec, HV *hv)
591	{	966	{
592	// for speed reasons, we specialcase single-string	967	// for speed reasons, we specialcase single-string
593	// byte or utf-8 strings as keys.	968	// byte or utf-8 strings as keys, but only when !stringref
594		969
595	if (*dec->cur >= 0x40 && *dec->cur <= 0x40 + 27)	970	if (ecb_expect_true (!dec->stringref))
		971	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
596	{	972	{
597	I32 len = decode_uint (dec);	973	STRLEN len = decode_uint (dec);
598	char *key = (char *)dec->cur;	974	char *key = (char *)dec->cur;
599		975
		976	WANT (len);
600	dec->cur += len;	977	dec->cur += len;
601		978
602	hv_store (hv, key, len, decode_sv (dec), 0);	979	hv_store (hv, key, len, decode_sv (dec), 0);
		980
		981	return;
603	}	982	}
604	else if (*dec->cur >= 0x60 && *dec->cur <= 0x60 + 27)	983	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
605	{	984	{
606	I32 len = decode_uint (dec);	985	STRLEN len = decode_uint (dec);
607	char *key = (char *)dec->cur;	986	char *key = (char *)dec->cur;
608		987
		988	WANT (len);
609	dec->cur += len;	989	dec->cur += len;
610		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
611	hv_store (hv, key, -len, decode_sv (dec), 0);	995	hv_store (hv, key, -len, decode_sv (dec), 0);
		996
		997	return;
612	}	998	}
613	else	999
614	{
615	SV *k = decode_sv (dec);	1000	SV *k = decode_sv (dec);
616	SV *v = decode_sv (dec);	1001	SV *v = decode_sv (dec);
617		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
618	hv_store_ent (hv, k, v, 0);	1031	hv_store_ent (hv, k, v, 0);
619	SvREFCNT_dec (k);	1032	SvREFCNT_dec_NN (k);
620	}	1033
		1034	fail:
		1035	;
621	}	1036	}
622		1037
623	static SV *	1038	static SV *
624	decode_hv (dec_t *dec)	1039	decode_hv (dec_t *dec)
625	{	1040	{
626	HV *hv = newHV ();	1041	HV *hv = newHV ();
627		1042
628	DEC_INC_DEPTH;	1043	DEC_INC_DEPTH;
629		1044
630	if ((*dec->cur & 31) == 31)	1045	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
631	{	1046	{
632	++dec->cur;	1047	++dec->cur;
633		1048
634	for (;;)	1049	for (;;)
635	{	1050	{
636	WANT (1);	1051	WANT (1);
637		1052
638	if (*dec->cur == (0xe0 | 31))	1053	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
639	{	1054	{
640	++dec->cur;	1055	++dec->cur;
641	break;	1056	break;
642	}	1057	}
643		1058
644	decode_he (dec, hv);	1059	decode_he (dec, hv);
645	}	1060	}
646	}	1061	}
647	else	1062	else
648	{	1063	{
649	int pairs = decode_uint (dec);	1064	UV pairs = decode_uint (dec);
		1065
		1066	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
650		1067
651	while (pairs--)	1068	while (pairs--)
652	decode_he (dec, hv);	1069	decode_he (dec, hv);
653	}	1070	}
654		1071
655	DEC_DEC_DEPTH;	1072	DEC_DEC_DEPTH;
656	return newRV_noinc ((SV *)hv);	1073	return newRV_noinc ((SV *)hv);
657		1074
658	fail:	1075	fail:
659	SvREFCNT_dec (hv);	1076	SvREFCNT_dec_NN (hv);
660	DEC_DEC_DEPTH;	1077	DEC_DEC_DEPTH;
661	return &PL_sv_undef;	1078	return &PL_sv_undef;
662	}	1079	}
663		1080
664	static SV *	1081	static SV *
665	decode_str (dec_t *dec, int utf8)	1082	decode_str (dec_t *dec, int utf8)
666	{	1083	{
667	SV *sv = 0;	1084	SV *sv = 0;
668		1085
669	if ((*dec->cur & 31) == 31)	1086	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
670	{	1087	{
		1088	// indefinite length strings
671	++dec->cur;	1089	++dec->cur;
672		1090
		1091	U8 major = *dec->cur & MAJOR_MISC;
		1092
673	sv = newSVpvn ("", 0);	1093	sv = newSVpvn ("", 0);
674		1094
675	// not very fast, and certainly not robust against illegal input
676	for (;;)	1095	for (;;)
677	{	1096	{
678	WANT (1);	1097	WANT (1);
679		1098
680	if (*dec->cur == (0xe0 | 31))	1099	if ((*dec->cur - major) > LENGTH_EXT8)
		1100	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
681	{	1101	{
682	++dec->cur;	1102	++dec->cur;
683	break;	1103	break;
684	}	1104	}
		1105	else
		1106	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
685		1107
686	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;
687	}	1113	}
688	}	1114	}
689	else	1115	else
690	{	1116	{
691	STRLEN len = decode_uint (dec);	1117	STRLEN len = decode_uint (dec);
692		1118
693	WANT (len);	1119	WANT (len);
694	sv = newSVpvn (dec->cur, len);	1120	sv = newSVpvn (dec->cur, len);
695	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));
696	}	1126	}
697		1127
698	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
699	SvUTF8_on (sv);	1134	SvUTF8_on (sv);
		1135	}
700		1136
701	return sv;	1137	return sv;
702		1138
703	fail:	1139	fail:
704	SvREFCNT_dec (sv);	1140	SvREFCNT_dec (sv);
…		…
706	}	1142	}
707		1143
708	static SV *	1144	static SV *
709	decode_tagged (dec_t *dec)	1145	decode_tagged (dec_t *dec)
710	{	1146	{
		1147	SV *sv = 0;
711	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:
712	SV *sv = decode_sv (dec);	1155	sv = decode_sv (dec);
		1156	break;
713		1157
714	if (tag == CBOR_TAG_MAGIC)	1158	case CBOR_TAG_INDIRECTION:
715	return sv;	1159	sv = newRV_noinc (decode_sv (dec));
716	else if (tag == CBOR_TAG_PERL_OBJECT)	1160	break;
717	{	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
718	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)	1239	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
719	ERR ("corrupted CBOR data (non-array perl object)");	1240	ERR ("corrupted CBOR data (non-array perl object)");
720		1241
721	AV *av = (AV *)SvRV (sv);	1242	AV *av = (AV *)SvRV (sv);
722	int len = av_len (av) + 1;	1243	int len = av_len (av) + 1;
723	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);	1244	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
724		1245
725	if (!stash)	1246	if (!stash)
726	ERR ("cannot decode perl-object (package does not exist)");	1247	ERR ("cannot decode perl-object (package does not exist)");
727		1248
728	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);	1249	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
729		1250
730	if (!method)	1251	if (!method)
731	ERR ("cannot decode perl-object (package does not have a THAW method)");	1252	ERR ("cannot decode perl-object (package does not have a THAW method)");
732		1253
733	dSP;	1254	dSP;
734		1255
735	ENTER; SAVETMPS; PUSHMARK (SP);	1256	ENTER; SAVETMPS;
		1257	PUSHMARK (SP);
736	EXTEND (SP, len + 1);	1258	EXTEND (SP, len + 1);
737	// we re-bless the reference to get overload and other niceties right	1259	// we re-bless the reference to get overload and other niceties right
738	PUSHs (*av_fetch (av, 0, 1));	1260	PUSHs (*av_fetch (av, 0, 1));
739	PUSHs (sv_cbor);	1261	PUSHs (sv_cbor);
740		1262
741	int i;	1263	int i;
742		1264
743	for (i = 1; i < len; ++i)	1265	for (i = 1; i < len; ++i)
744	PUSHs (*av_fetch (av, i, 1));	1266	PUSHs (*av_fetch (av, i, 1));
745		1267
746	PUTBACK;	1268	PUTBACK;
747	call_sv ((SV *)GvCV (method), G_SCALAR);	1269	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
748	SPAGAIN;	1270	SPAGAIN;
749		1271
		1272	if (SvTRUE (ERRSV))
		1273	{
		1274	FREETMPS; LEAVE;
		1275	ERR_ERRSV;
		1276	}
		1277
750	SvREFCNT_dec (sv);	1278	SvREFCNT_dec_NN (sv);
751	sv = SvREFCNT_inc (POPs);	1279	sv = SvREFCNT_inc (POPs);
752		1280
753	PUTBACK;	1281	PUTBACK;
754		1282
755	FREETMPS; LEAVE;	1283	FREETMPS; LEAVE;
		1284	}
		1285	break;
756		1286
757	return sv;	1287	default:
758	}	1288	filter:
759	else	1289	{
760	{	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	{
761	AV *av = newAV ();	1321	AV *av = newAV ();
762	av_push (av, newSVuv (tag));	1322	av_push (av, tag_sv);
763	av_push (av, sv);	1323	av_push (av, sv);
764		1324
765	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	1325	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
766	? cbor_tagged_stash	1326	? cbor_tagged_stash
767	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1327	: gv_stashpv ("CBOR::XS::Tagged" , 1);
768
769	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);	1328	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1329	}
		1330
		1331	PUTBACK;
		1332
		1333	FREETMPS; LEAVE;
		1334	}
		1335	break;
770	}	1336	}
		1337
		1338	return sv;
771		1339
772	fail:	1340	fail:
773	SvREFCNT_dec (sv);	1341	SvREFCNT_dec (sv);
774	return &PL_sv_undef;	1342	return &PL_sv_undef;
775	}	1343	}
…		…
777	static SV *	1345	static SV *
778	decode_sv (dec_t *dec)	1346	decode_sv (dec_t *dec)
779	{	1347	{
780	WANT (1);	1348	WANT (1);
781		1349
782	switch (*dec->cur >> 5)	1350	switch (*dec->cur >> MAJOR_SHIFT)
783	{	1351	{
784	case 0: // unsigned int	1352	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
785	return newSVuv (decode_uint (dec));	1353	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
786	case 1: // negative int	1354	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
787	return newSViv (-1 - (IV)decode_uint (dec));	1355	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
788	case 2: // octet string	1356	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
789	return decode_str (dec, 0);	1357	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
790	case 3: // utf-8 string	1358	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
791	return decode_str (dec, 1);	1359
792	case 4: // array	1360	case MAJOR_MISC >> MAJOR_SHIFT:
793	return decode_av (dec);
794	case 5: // map
795	return decode_hv (dec);
796	case 6: // tag
797	return decode_tagged (dec);
798	case 7: // misc
799	switch (*dec->cur++ & 31)	1361	switch (*dec->cur++ & MINOR_MASK)
800	{	1362	{
801	case 20:	1363	case SIMPLE_FALSE:
802	#if CBOR_SLOW	1364	#if CBOR_SLOW
803	types_false = get_bool ("Types::Serialiser::false");	1365	types_false = get_bool ("Types::Serialiser::false");
804	#endif	1366	#endif
805	return newSVsv (types_false);	1367	return newSVsv (types_false);
806	case 21:	1368	case SIMPLE_TRUE:
807	#if CBOR_SLOW	1369	#if CBOR_SLOW
808	types_true = get_bool ("Types::Serialiser::true");	1370	types_true = get_bool ("Types::Serialiser::true");
809	#endif	1371	#endif
810	return newSVsv (types_true);	1372	return newSVsv (types_true);
811	case 22:	1373	case SIMPLE_NULL:
812	return newSVsv (&PL_sv_undef);	1374	return newSVsv (&PL_sv_undef);
813	case 23:	1375	case SIMPLE_UNDEF:
814	#if CBOR_SLOW	1376	#if CBOR_SLOW
815	types_error = get_bool ("Types::Serialiser::error");	1377	types_error = get_bool ("Types::Serialiser::error");
816	#endif	1378	#endif
817	return newSVsv (types_error);	1379	return newSVsv (types_error);
818		1380
819	case 25:	1381	case MISC_FLOAT16:
820	{	1382	{
821	WANT (2);	1383	WANT (2);
822		1384
823	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1385	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
824	dec->cur += 2;	1386	dec->cur += 2;
825		1387
826	return newSVnv (ecb_binary16_to_float (fp));	1388	return newSVnv (ecb_binary16_to_float (fp));
827	}	1389	}
828		1390
829	case 26:	1391	case MISC_FLOAT32:
830	{	1392	{
831	uint32_t fp;	1393	uint32_t fp;
832	WANT (4);	1394	WANT (4);
833	memcpy (&fp, dec->cur, 4);	1395	memcpy (&fp, dec->cur, 4);
834	dec->cur += 4;	1396	dec->cur += 4;
…		…
837	fp = ecb_bswap32 (fp);	1399	fp = ecb_bswap32 (fp);
838		1400
839	return newSVnv (ecb_binary32_to_float (fp));	1401	return newSVnv (ecb_binary32_to_float (fp));
840	}	1402	}
841		1403
842	case 27:	1404	case MISC_FLOAT64:
843	{	1405	{
844	uint64_t fp;	1406	uint64_t fp;
845	WANT (8);	1407	WANT (8);
846	memcpy (&fp, dec->cur, 8);	1408	memcpy (&fp, dec->cur, 8);
847	dec->cur += 8;	1409	dec->cur += 8;
…		…
850	fp = ecb_bswap64 (fp);	1412	fp = ecb_bswap64 (fp);
851		1413
852	return newSVnv (ecb_binary64_to_double (fp));	1414	return newSVnv (ecb_binary64_to_double (fp));
853	}	1415	}
854		1416
855	// 0..19 unassigned	1417	// 0..19 unassigned simple
856	// 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
857	default:	1421	default:
858	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1422	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
859	}	1423	}
860		1424
861	break;	1425	break;
862	}	1426	}
863		1427
…		…
866	}	1430	}
867		1431
868	static SV *	1432	static SV *
869	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1433	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
870	{	1434	{
871	dec_t dec;	1435	dec_t dec = { 0 };
872	SV *sv;	1436	SV *sv;
873	STRLEN len;	1437	STRLEN len;
874	char *data = SvPVbyte (string, len);	1438	char *data = SvPVbyte (string, len);
875		1439
876	if (len > cbor->max_size && cbor->max_size)	1440	if (len > cbor->max_size && cbor->max_size)
…		…
878	(unsigned long)len, (unsigned long)cbor->max_size);	1442	(unsigned long)len, (unsigned long)cbor->max_size);
879		1443
880	dec.cbor = *cbor;	1444	dec.cbor = *cbor;
881	dec.cur = (U8 *)data;	1445	dec.cur = (U8 *)data;
882	dec.end = (U8 *)data + len;	1446	dec.end = (U8 *)data + len;
883	dec.err = 0;
884	dec.depth = 0;
885		1447
886	sv = decode_sv (&dec);	1448	sv = decode_sv (&dec);
887		1449
888	if (offset_return)	1450	if (offset_return)
889	*offset_return = dec.cur;	1451	*offset_return = dec.cur;
…		…
892	if (dec.cur != dec.end && !dec.err)	1454	if (dec.cur != dec.end && !dec.err)
893	dec.err = "garbage after CBOR object";	1455	dec.err = "garbage after CBOR object";
894		1456
895	if (dec.err)	1457	if (dec.err)
896	{	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
897	SvREFCNT_dec (sv);	1470	SvREFCNT_dec_NN (sv);
		1471
		1472	if (dec.err_sv)
		1473	sv_2mortal (dec.err_sv);
		1474
898	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (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);
899	}	1476	}
900		1477
901	sv = sv_2mortal (sv);	1478	sv = sv_2mortal (sv);
902		1479
903	return sv;	1480	return sv;
904	}	1481	}
905		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
906	/////////////////////////////////////////////////////////////////////////////	1607	/////////////////////////////////////////////////////////////////////////////
907	// XS interface functions	1608	// XS interface functions
908		1609
909	MODULE = CBOR::XS PACKAGE = CBOR::XS	1610	MODULE = CBOR::XS PACKAGE = CBOR::XS
910		1611
…		…
918		1619
919	types_true = get_bool ("Types::Serialiser::true" );	1620	types_true = get_bool ("Types::Serialiser::true" );
920	types_false = get_bool ("Types::Serialiser::false");	1621	types_false = get_bool ("Types::Serialiser::false");
921	types_error = get_bool ("Types::Serialiser::error");	1622	types_error = get_bool ("Types::Serialiser::error");
922		1623
		1624	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1625
923	sv_cbor = newSVpv ("CBOR", 0);	1626	sv_cbor = newSVpv ("CBOR", 0);
924	SvREADONLY_on (sv_cbor);	1627	SvREADONLY_on (sv_cbor);
		1628
		1629	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
925	}	1630	}
926		1631
927	PROTOTYPES: DISABLE	1632	PROTOTYPES: DISABLE
928		1633
929	void CLONE (...)	1634	void CLONE (...)
…		…
947		1652
948	void shrink (CBOR *self, int enable = 1)	1653	void shrink (CBOR *self, int enable = 1)
949	ALIAS:	1654	ALIAS:
950	shrink = F_SHRINK	1655	shrink = F_SHRINK
951	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
952	PPCODE:	1664	PPCODE:
953	{	1665	{
954	if (enable)	1666	if (enable)
955	self->flags |= ix;	1667	self->flags |= ix;
956	else	1668	else
…		…
961		1673
962	void get_shrink (CBOR *self)	1674	void get_shrink (CBOR *self)
963	ALIAS:	1675	ALIAS:
964	get_shrink = F_SHRINK	1676	get_shrink = F_SHRINK
965	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
966	PPCODE:	1685	PPCODE:
967	XPUSHs (boolSV (self->flags & ix));	1686	XPUSHs (boolSV (self->flags & ix));
968		1687
969	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1688	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
970	PPCODE:	1689	PPCODE:
…		…
983	XPUSHs (ST (0));	1702	XPUSHs (ST (0));
984		1703
985	int get_max_size (CBOR *self)	1704	int get_max_size (CBOR *self)
986	CODE:	1705	CODE:
987	RETVAL = self->max_size;	1706	RETVAL = self->max_size;
		1707	OUTPUT:
		1708	RETVAL
		1709
		1710	void filter (CBOR *self, SV *filter = 0)
		1711	PPCODE:
		1712	SvREFCNT_dec (self->filter);
		1713	self->filter = filter ? newSVsv (filter) : filter;
		1714	XPUSHs (ST (0));
		1715
		1716	SV *get_filter (CBOR *self)
		1717	CODE:
		1718	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
988	OUTPUT:	1719	OUTPUT:
989	RETVAL	1720	RETVAL
990		1721
991	void encode (CBOR *self, SV *scalar)	1722	void encode (CBOR *self, SV *scalar)
992	PPCODE:	1723	PPCODE:
…		…
1007	EXTEND (SP, 2);	1738	EXTEND (SP, 2);
1008	PUSHs (sv);	1739	PUSHs (sv);
1009	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1740	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1010	}	1741	}
1011		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
		1795	void DESTROY (CBOR *self)
		1796	PPCODE:
		1797	cbor_free (self);
		1798
1012	PROTOTYPES: ENABLE	1799	PROTOTYPES: ENABLE
1013		1800
1014	void encode_cbor (SV *scalar)	1801	void encode_cbor (SV *scalar)
		1802	ALIAS:
		1803	encode_cbor = 0
		1804	encode_cbor_sharing = F_ALLOW_SHARING
1015	PPCODE:	1805	PPCODE:
1016	{	1806	{
1017	CBOR cbor;	1807	CBOR cbor;
1018	cbor_init (&cbor);	1808	cbor_init (&cbor);
		1809	cbor.flags |= ix;
1019	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1810	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1020	XPUSHs (scalar);	1811	XPUSHs (scalar);
1021	}	1812	}
1022		1813
1023	void decode_cbor (SV *cborstr)	1814	void decode_cbor (SV *cborstr)
…		…
1027	cbor_init (&cbor);	1818	cbor_init (&cbor);
1028	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1819	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1029	XPUSHs (cborstr);	1820	XPUSHs (cborstr);
1030	}	1821	}
1031		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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