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Comparing cvsroot/CBOR-XS/XS.xs (file contents):
Revision 1.4 by root, Sat Oct 26 21:06:37 2013 UTC vs.
Revision 1.60 by root, Sat Nov 26 00:47:02 2016 UTC

…		…
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		11
		12	#define ECB_NO_THREADS 1
12	#include "ecb.h"	13	#include "ecb.h"
13		14
		15	// compatibility with perl <5.18
		16	#ifndef HvNAMELEN_get
		17	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		18	#endif
		19	#ifndef HvNAMELEN
		20	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		21	#endif
		22	#ifndef HvNAMEUTF8
		23	# define HvNAMEUTF8(hv) 0
		24	#endif
		25	#ifndef SvREFCNT_dec_NN
		26	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		27	#endif
		28
		29	// known major and minor types
		30	enum cbor_type
		31	{
		32	MAJOR_SHIFT = 5,
		33	MINOR_MASK = 0x1f,
		34
		35	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		36	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		37	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		38	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		39	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		40	MAJOR_MAP = 5 << MAJOR_SHIFT,
		41	MAJOR_TAG = 6 << MAJOR_SHIFT,
		42	MAJOR_MISC = 7 << MAJOR_SHIFT,
		43
		44	// INT/STRING/ARRAY/MAP subtypes
		45	LENGTH_EXT1 = 24,
		46	LENGTH_EXT2 = 25,
		47	LENGTH_EXT4 = 26,
		48	LENGTH_EXT8 = 27,
		49
		50	// SIMPLE types (effectively MISC subtypes)
		51	SIMPLE_FALSE = 20,
		52	SIMPLE_TRUE = 21,
		53	SIMPLE_NULL = 22,
		54	SIMPLE_UNDEF = 23,
		55
		56	// MISC subtype (unused)
		57	MISC_EXT1 = 24,
		58	MISC_FLOAT16 = 25,
		59	MISC_FLOAT32 = 26,
		60	MISC_FLOAT64 = 27,
		61
		62	// BYTES/TEXT/ARRAY/MAP
		63	MINOR_INDEF = 31,
		64	};
		65
		66	// known tags
		67	enum cbor_tag
		68	{
		69	// extensions
		70	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
		71	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
		72	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
		73	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
		74	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
		75	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
		76	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
		77
		78	// rfc7049
		79	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
		80	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
		81	CBOR_TAG_POS_BIGNUM = 2, // byte string
		82	CBOR_TAG_NEG_BIGNUM = 3, // byte string
		83	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
		84	CBOR_TAG_BIGFLOAT = 5, // array
		85
		86	CBOR_TAG_CONV_B64U = 21, // base64url, any
		87	CBOR_TAG_CONV_B64 = 22, // base64, any
		88	CBOR_TAG_CONV_HEX = 23, // base16, any
		89	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
		90
		91	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
		92	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
		93	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
		94	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
		95	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
		96
		97	CBOR_TAG_MAGIC = 55799, // self-describe cbor
		98	};
		99
14	#define F_SHRINK 0x00000200UL	100	#define F_SHRINK 0x00000001UL
15	#define F_ALLOW_UNKNOWN 0x00002000UL	101	#define F_ALLOW_UNKNOWN 0x00000002UL
		102	#define F_ALLOW_SHARING 0x00000004UL
		103	#define F_ALLOW_CYCLES 0x00000008UL
		104	#define F_FORBID_OBJECTS 0x00000010UL
		105	#define F_PACK_STRINGS 0x00000020UL
		106	#define F_TEXT_KEYS 0x00000040UL
		107	#define F_TEXT_STRINGS 0x00000080UL
		108	#define F_VALIDATE_UTF8 0x00000100UL
16		109
17	#define INIT_SIZE 32 // initial scalar size to be allocated	110	#define INIT_SIZE 32 // initial scalar size to be allocated
18		111
19	#define SB do {	112	#define SB do {
20	#define SE } while (0)	113	#define SE } while (0)
21
22	#if __GNUC__ >= 3
23	# define expect(expr,value) __builtin_expect ((expr), (value))
24	# define INLINE static inline
25	#else
26	# define expect(expr,value) (expr)
27	# define INLINE static
28	#endif
29
30	#define expect_false(expr) expect ((expr) != 0, 0)
31	#define expect_true(expr) expect ((expr) != 0, 1)
32		114
33	#define IN_RANGE_INC(type,val,beg,end) \	115	#define IN_RANGE_INC(type,val,beg,end) \
34	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \	116	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
35	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))	117	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
36		118
…		…
42	#else	124	#else
43	# define CBOR_SLOW 0	125	# define CBOR_SLOW 0
44	# define CBOR_STASH cbor_stash	126	# define CBOR_STASH cbor_stash
45	#endif	127	#endif
46		128
47	static HV *cbor_stash, *cbor_boolean_stash; // CBOR::XS::	129	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
48	static SV *cbor_true, *cbor_false;	130	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
49		131
50	typedef struct {	132	typedef struct {
51	U32 flags;	133	U32 flags;
52	U32 max_depth;	134	U32 max_depth;
53	STRLEN max_size;	135	STRLEN max_size;
		136	SV *filter;
54		137
55	SV *cb_object;	138	// for the incremental parser
56	HV *cb_sk_object;	139	STRLEN incr_pos; // the current offset into the text
		140	STRLEN incr_need; // minimum bytes needed to decode
		141	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
57	} CBOR;	142	} CBOR;
58		143
59	INLINE void	144	ecb_inline void
60	cbor_init (CBOR *cbor)	145	cbor_init (CBOR *cbor)
61	{	146	{
62	Zero (cbor, 1, CBOR);	147	Zero (cbor, 1, CBOR);
63	cbor->max_depth = 512;	148	cbor->max_depth = 512;
64	}	149	}
65		150
		151	ecb_inline void
		152	cbor_free (CBOR *cbor)
		153	{
		154	SvREFCNT_dec (cbor->filter);
		155	SvREFCNT_dec (cbor->incr_count);
		156	}
		157
66	/////////////////////////////////////////////////////////////////////////////	158	/////////////////////////////////////////////////////////////////////////////
67	// utility functions	159	// utility functions
68		160
69	INLINE SV *	161	ecb_inline SV *
70	get_bool (const char *name)	162	get_bool (const char *name)
71	{	163	{
72	SV *sv = get_sv (name, 1);	164	SV *sv = get_sv (name, 1);
73		165
74	SvREADONLY_on (sv);	166	SvREADONLY_on (sv);
75	SvREADONLY_on (SvRV (sv));	167	SvREADONLY_on (SvRV (sv));
76		168
77	return sv;	169	return sv;
78	}	170	}
79		171
80	INLINE void	172	ecb_inline void
81	shrink (SV *sv)	173	shrink (SV *sv)
82	{	174	{
83	sv_utf8_downgrade (sv, 1);	175	sv_utf8_downgrade (sv, 1);
84		176
85	if (SvLEN (sv) > SvCUR (sv) + 1)	177	if (SvLEN (sv) > SvCUR (sv) + 1)
…		…
90	SvPV_renew (sv, SvCUR (sv) + 1);	182	SvPV_renew (sv, SvCUR (sv) + 1);
91	#endif	183	#endif
92	}	184	}
93	}	185	}
94		186
95	/////////////////////////////////////////////////////////////////////////////	187	// minimum length of a string to be registered for stringref
96	// fp hell	188	ecb_inline int
97		189	minimum_string_length (UV idx)
98	//TODO	190	{
		191	return idx > 23
		192	? idx > 0xffU
		193	? idx > 0xffffU
		194	? idx > 0xffffffffU
		195	? 11
		196	: 7
		197	: 5
		198	: 4
		199	: 3;
		200	}
99		201
100	/////////////////////////////////////////////////////////////////////////////	202	/////////////////////////////////////////////////////////////////////////////
101	// encoder	203	// encoder
102		204
103	// structure used for encoding CBOR	205	// structure used for encoding CBOR
…		…
106	char *cur; // SvPVX (sv) + current output position	208	char *cur; // SvPVX (sv) + current output position
107	char *end; // SvEND (sv)	209	char *end; // SvEND (sv)
108	SV *sv; // result scalar	210	SV *sv; // result scalar
109	CBOR cbor;	211	CBOR cbor;
110	U32 depth; // recursion level	212	U32 depth; // recursion level
		213	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		214	UV stringref_idx;
		215	HV *shareable; // ptr => index, or 0
		216	UV shareable_idx;
111	} enc_t;	217	} enc_t;
112		218
113	INLINE void	219	ecb_inline void
114	need (enc_t *enc, STRLEN len)	220	need (enc_t *enc, STRLEN len)
115	{	221	{
116	if (expect_false (enc->cur + len >= enc->end))	222	if (ecb_expect_false (enc->cur + len >= enc->end))
117	{	223	{
118	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	224	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
119	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	225	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
120	enc->cur = SvPVX (enc->sv) + cur;	226	enc->cur = SvPVX (enc->sv) + cur;
121	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	227	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
122	}	228	}
123	}	229	}
124		230
125	INLINE void	231	ecb_inline void
126	encode_ch (enc_t *enc, char ch)	232	encode_ch (enc_t *enc, char ch)
127	{	233	{
128	need (enc, 1);	234	need (enc, 1);
129	*enc->cur++ = ch;	235	*enc->cur++ = ch;
130	}	236	}
…		…
132	static void	238	static void
133	encode_uint (enc_t *enc, int major, UV len)	239	encode_uint (enc_t *enc, int major, UV len)
134	{	240	{
135	need (enc, 9);	241	need (enc, 9);
136		242
137	if (len < 24)	243	if (ecb_expect_true (len < LENGTH_EXT1))
138	*enc->cur++ = major | len;	244	*enc->cur++ = major | len;
139	else if (len <= 0xff)	245	else if (ecb_expect_true (len <= 0xffU))
140	{	246	{
141	*enc->cur++ = major | 24;	247	*enc->cur++ = major | LENGTH_EXT1;
142	*enc->cur++ = len;	248	*enc->cur++ = len;
143	}	249	}
144	else if (len <= 0xffff)	250	else if (len <= 0xffffU)
145	{	251	{
146	*enc->cur++ = major | 25;	252	*enc->cur++ = major | LENGTH_EXT2;
147	*enc->cur++ = len >> 8;	253	*enc->cur++ = len >> 8;
148	*enc->cur++ = len;	254	*enc->cur++ = len;
149	}	255	}
150	else if (len <= 0xffffffff)	256	else if (len <= 0xffffffffU)
151	{	257	{
152	*enc->cur++ = major | 26;	258	*enc->cur++ = major | LENGTH_EXT4;
153	*enc->cur++ = len >> 24;	259	*enc->cur++ = len >> 24;
154	*enc->cur++ = len >> 16;	260	*enc->cur++ = len >> 16;
155	*enc->cur++ = len >> 8;	261	*enc->cur++ = len >> 8;
156	*enc->cur++ = len;	262	*enc->cur++ = len;
157	}	263	}
158	else	264	else
159	{	265	{
160	*enc->cur++ = major | 27;	266	*enc->cur++ = major | LENGTH_EXT8;
161	*enc->cur++ = len >> 56;	267	*enc->cur++ = len >> 56;
162	*enc->cur++ = len >> 48;	268	*enc->cur++ = len >> 48;
163	*enc->cur++ = len >> 40;	269	*enc->cur++ = len >> 40;
164	*enc->cur++ = len >> 32;	270	*enc->cur++ = len >> 32;
165	*enc->cur++ = len >> 24;	271	*enc->cur++ = len >> 24;
…		…
167	*enc->cur++ = len >> 8;	273	*enc->cur++ = len >> 8;
168	*enc->cur++ = len;	274	*enc->cur++ = len;
169	}	275	}
170	}	276	}
171		277
172	static void	278	ecb_inline void
		279	encode_tag (enc_t *enc, UV tag)
		280	{
		281	encode_uint (enc, MAJOR_TAG, tag);
		282	}
		283
		284	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		285	ecb_noinline static void
173	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	286	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
174	{	287	{
175	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	288	STRLEN ulen = len;
		289	U8 *p, *pend = (U8 *)str + len;
		290
		291	for (p = (U8 *)str; p < pend; ++p)
		292	ulen += *p >> 7; // count set high bits
		293
		294	encode_uint (enc, MAJOR_TEXT, ulen);
		295
		296	need (enc, ulen);
		297	for (p = (U8 *)str; p < pend; ++p)
		298	if (*p < 0x80)
		299	*enc->cur++ = *p;
		300	else
		301	{
		302	*enc->cur++ = 0xc0 + (*p >> 6);
		303	*enc->cur++ = 0x80 + (*p & 63);
		304	}
		305	}
		306
		307	ecb_inline void
		308	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		309	{
		310	if (ecb_expect_false (upgrade_utf8))
		311	if (!utf8)
		312	{
		313	encode_str_utf8 (enc, utf8, str, len);
		314	return;
		315	}
		316
		317	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
176	need (enc, len);	318	need (enc, len);
177	memcpy (enc->cur, str, len);	319	memcpy (enc->cur, str, len);
178	enc->cur += len;	320	enc->cur += len;
179	}	321	}
180		322
		323	ecb_inline void
		324	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		325	{
		326	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		327	{
		328	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		329
		330	if (SvOK (*svp))
		331	{
		332	// already registered, use stringref
		333	encode_tag (enc, CBOR_TAG_STRINGREF);
		334	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		335	return;
		336	}
		337	else if (len >= minimum_string_length (enc->stringref_idx))
		338	{
		339	// register only
		340	sv_setuv (*svp, enc->stringref_idx);
		341	++enc->stringref_idx;
		342	}
		343	}
		344
		345	encode_str (enc, upgrade_utf8, utf8, str, len);
		346	}
		347
181	static void encode_sv (enc_t *enc, SV *sv);	348	static void encode_sv (enc_t *enc, SV *sv);
182		349
183	static void	350	static void
184	encode_av (enc_t *enc, AV *av)	351	encode_av (enc_t *enc, AV *av)
185	{	352	{
…		…
188	if (enc->depth >= enc->cbor.max_depth)	355	if (enc->depth >= enc->cbor.max_depth)
189	croak (ERR_NESTING_EXCEEDED);	356	croak (ERR_NESTING_EXCEEDED);
190		357
191	++enc->depth;	358	++enc->depth;
192		359
193	encode_uint (enc, 0x80, len + 1);	360	encode_uint (enc, MAJOR_ARRAY, len + 1);
194		361
		362	if (SvMAGICAL (av))
195	for (i = 0; i <= len; ++i)	363	for (i = 0; i <= len; ++i)
196	{	364	{
197	SV **svp = av_fetch (av, i, 0);	365	SV **svp = av_fetch (av, i, 0);
198	encode_sv (enc, svp ? *svp : &PL_sv_undef);	366	encode_sv (enc, svp ? *svp : &PL_sv_undef);
199	}	367	}
		368	else
		369	for (i = 0; i <= len; ++i)
		370	{
		371	SV *sv = AvARRAY (av)[i];
		372	encode_sv (enc, sv ? sv : &PL_sv_undef);
		373	}
200		374
201	--enc->depth;	375	--enc->depth;
202	}	376	}
203		377
204	static void	378	static void
…		…
213		387
214	int pairs = hv_iterinit (hv);	388	int pairs = hv_iterinit (hv);
215	int mg = SvMAGICAL (hv);	389	int mg = SvMAGICAL (hv);
216		390
217	if (mg)	391	if (mg)
218	encode_ch (enc, 0xa0 | 31);	392	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
219	else	393	else
220	encode_uint (enc, 0xa0, pairs);	394	encode_uint (enc, MAJOR_MAP, pairs);
221		395
222	while ((he = hv_iternext (hv)))	396	while ((he = hv_iternext (hv)))
223	{	397	{
224	if (HeKLEN (he) == HEf_SVKEY)	398	if (HeKLEN (he) == HEf_SVKEY)
225	encode_sv (enc, HeSVKEY (he));	399	encode_sv (enc, HeSVKEY (he));
226	else	400	else
227	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	401	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
228		402
229	encode_sv (enc, expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	403	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
230	}	404	}
231		405
232	if (mg)	406	if (mg)
233	encode_ch (enc, 0xe0 | 31);	407	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
234		408
235	--enc->depth;	409	--enc->depth;
236	}	410	}
237		411
238	// encode objects, arrays and special \0=false and \1=true values.	412	// encode objects, arrays and special \0=false and \1=true values.
239	static void	413	static void
240	encode_rv (enc_t *enc, SV *sv)	414	encode_rv (enc_t *enc, SV *sv)
241	{	415	{
242	svtype svt;
243
244	SvGETMAGIC (sv);	416	SvGETMAGIC (sv);
		417
245	svt = SvTYPE (sv);	418	svtype svt = SvTYPE (sv);
246		419
247	if (expect_false (SvOBJECT (sv)))	420	if (ecb_expect_false (SvOBJECT (sv)))
248	{	421	{
249	HV *stash = !CBOR_SLOW || cbor_boolean_stash	422	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
250	? cbor_boolean_stash	423	? types_boolean_stash
		424	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		425	HV *error_stash = !CBOR_SLOW || types_error_stash
		426	? types_error_stash
		427	: gv_stashpv ("Types::Serialiser::Error", 1);
		428	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		429	? cbor_tagged_stash
251	: gv_stashpv ("CBOR::XS::Boolean", 1);	430	: gv_stashpv ("CBOR::XS::Tagged" , 1);
252		431
253	if (SvSTASH (sv) == stash)	432	HV *stash = SvSTASH (sv);
254	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	433
		434	if (stash == boolean_stash)
		435	{
		436	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		437	return;
		438	}
		439	else if (stash == error_stash)
		440	{
		441	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		442	return;
		443	}
		444	else if (stash == tagged_stash)
		445	{
		446	if (svt != SVt_PVAV)
		447	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		448
		449	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
		450	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		451
		452	return;
		453	}
		454	}
		455
		456	if (ecb_expect_false (SvREFCNT (sv) > 1)
		457	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		458	{
		459	if (!enc->shareable)
		460	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		461
		462	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		463
		464	if (SvOK (*svp))
		465	{
		466	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		467	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		468	return;
		469	}
255	else	470	else
256	{	471	{
257	#if 0 //TODO	472	sv_setuv (*svp, enc->shareable_idx);
258	if (enc->cbor.flags & F_CONV_BLESSED)	473	++enc->shareable_idx;
		474	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		475	}
		476	}
		477
		478	if (ecb_expect_false (SvOBJECT (sv)))
		479	{
		480	HV *stash = SvSTASH (sv);
		481	GV *method;
		482
		483	if (enc->cbor.flags & F_FORBID_OBJECTS)
		484	croak ("encountered object '%s', but forbid_objects is enabled",
		485	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		486	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
259	{	487	{
		488	dSP;
		489
		490	ENTER; SAVETMPS;
		491	PUSHMARK (SP);
260	// we re-bless the reference to get overload and other niceties right	492	// we re-bless the reference to get overload and other niceties right
261	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
262
263	if (to_cbor)
264	{
265	dSP;
266
267	ENTER; SAVETMPS; PUSHMARK (SP);
268	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	493	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
269		494
270	// calling with G_SCALAR ensures that we always get a 1 return value
271	PUTBACK;	495	PUTBACK;
		496	// G_SCALAR ensures that return value is 1
272	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	497	call_sv ((SV *)GvCV (method), G_SCALAR);
273	SPAGAIN;	498	SPAGAIN;
274		499
275	// catch this surprisingly common error	500	// catch this surprisingly common error
276	if (SvROK (TOPs) && SvRV (TOPs) == sv)	501	if (SvROK (TOPs) && SvRV (TOPs) == sv)
277	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	502	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
278		503
279	sv = POPs;
280	PUTBACK;
281
282	encode_sv (enc, sv);	504	encode_sv (enc, POPs);
283		505
		506	PUTBACK;
		507
284	FREETMPS; LEAVE;	508	FREETMPS; LEAVE;
285	}
286	else if (enc->cbor.flags & F_ALLOW_BLESSED)
287	encode_str (enc, "null", 4, 0);
288	else
289	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it",
290	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
291	}	509	}
292	else if (enc->cbor.flags & F_ALLOW_BLESSED)	510	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
293	encode_str (enc, "null", 4, 0);	511	{
		512	dSP;
		513
		514	ENTER; SAVETMPS;
		515	SAVESTACK_POS ();
		516	PUSHMARK (SP);
		517	EXTEND (SP, 2);
		518	// we re-bless the reference to get overload and other niceties right
		519	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		520	PUSHs (sv_cbor);
		521
		522	PUTBACK;
		523	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		524	SPAGAIN;
		525
		526	// catch this surprisingly common error
		527	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		528	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		529
		530	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		531	encode_uint (enc, MAJOR_ARRAY, count + 1);
		532	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		533
		534	while (count)
		535	encode_sv (enc, SP[1 - count--]);
		536
		537	PUTBACK;
		538
		539	FREETMPS; LEAVE;
		540	}
294	else	541	else
295	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	542	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
296	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	543	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
297	#endif
298	}
299	}	544	}
300	else if (svt == SVt_PVHV)	545	else if (svt == SVt_PVHV)
301	encode_hv (enc, (HV *)sv);	546	encode_hv (enc, (HV *)sv);
302	else if (svt == SVt_PVAV)	547	else if (svt == SVt_PVAV)
303	encode_av (enc, (AV *)sv);	548	encode_av (enc, (AV *)sv);
304	else if (svt < SVt_PVAV)
305	{
306	STRLEN len = 0;
307	char *pv = svt ? SvPV (sv, len) : 0;
308
309	if (len == 1 && *pv == '1')
310	encode_ch (enc, 0xe0 | 21);
311	else if (len == 1 && *pv == '0')
312	encode_ch (enc, 0xe0 | 20);
313	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
314	encode_ch (enc, 0xe0 | 23);
315	else
316	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
317	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
318	}
319	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
320	encode_ch (enc, 0xe0 | 23);
321	else	549	else
322	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	550	{
323	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	551	encode_tag (enc, CBOR_TAG_INDIRECTION);
		552	encode_sv (enc, sv);
		553	}
324	}	554	}
325		555
326	static void	556	static void
327	encode_nv (enc_t *enc, SV *sv)	557	encode_nv (enc_t *enc, SV *sv)
328	{	558	{
329	double nv = SvNVX (sv);	559	double nv = SvNVX (sv);
330		560
331	need (enc, 9);	561	need (enc, 9);
332		562
333	if (expect_false (nv == (U32)nv))	563	if (ecb_expect_false (nv == (NV)(U32)nv))
334	encode_uint (enc, 0x00, (U32)nv);	564	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
335	//TODO: maybe I32?	565	//TODO: maybe I32?
336	else if (expect_false (nv == (float)nv))	566	else if (ecb_expect_false (nv == (float)nv))
337	{	567	{
338	uint32_t fp = ecb_float_to_binary32 (nv);	568	uint32_t fp = ecb_float_to_binary32 (nv);
339		569
340	*enc->cur++ = 0xe0 | 26;	570	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
341		571
342	if (!ecb_big_endian ())	572	if (!ecb_big_endian ())
343	fp = ecb_bswap32 (fp);	573	fp = ecb_bswap32 (fp);
344		574
345	memcpy (enc->cur, &fp, 4);	575	memcpy (enc->cur, &fp, 4);
…		…
347	}	577	}
348	else	578	else
349	{	579	{
350	uint64_t fp = ecb_double_to_binary64 (nv);	580	uint64_t fp = ecb_double_to_binary64 (nv);
351		581
352	*enc->cur++ = 0xe0 | 27;	582	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
353		583
354	if (!ecb_big_endian ())	584	if (!ecb_big_endian ())
355	fp = ecb_bswap64 (fp);	585	fp = ecb_bswap64 (fp);
356		586
357	memcpy (enc->cur, &fp, 8);	587	memcpy (enc->cur, &fp, 8);
…		…
366		596
367	if (SvPOKp (sv))	597	if (SvPOKp (sv))
368	{	598	{
369	STRLEN len;	599	STRLEN len;
370	char *str = SvPV (sv, len);	600	char *str = SvPV (sv, len);
371	encode_str (enc, SvUTF8 (sv), str, len);	601	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
372	}	602	}
373	else if (SvNOKp (sv))	603	else if (SvNOKp (sv))
374	encode_nv (enc, sv);	604	encode_nv (enc, sv);
375	else if (SvIOKp (sv))	605	else if (SvIOKp (sv))
376	{	606	{
377	if (SvIsUV (sv))	607	if (SvIsUV (sv))
378	encode_uint (enc, 0x00, SvUVX (sv));	608	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
379	else if (SvIVX (sv) >= 0)	609	else if (SvIVX (sv) >= 0)
380	encode_uint (enc, 0x00, SvIVX (sv));	610	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
381	else	611	else
382	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	612	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
383	}	613	}
384	else if (SvROK (sv))	614	else if (SvROK (sv))
385	encode_rv (enc, SvRV (sv));	615	encode_rv (enc, SvRV (sv));
386	else if (!SvOK (sv))	616	else if (!SvOK (sv))
387	encode_ch (enc, 0xe0 | 22);	617	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
388	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	618	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
389	encode_ch (enc, 0xe0 | 23);	619	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
390	else	620	else
391	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	621	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
392	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	622	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
393	}	623	}
394		624
395	static SV *	625	static SV *
396	encode_cbor (SV *scalar, CBOR *cbor)	626	encode_cbor (SV *scalar, CBOR *cbor)
397	{	627	{
398	enc_t enc;	628	enc_t enc = { 0 };
399		629
400	enc.cbor = *cbor;	630	enc.cbor = *cbor;
401	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	631	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
402	enc.cur = SvPVX (enc.sv);	632	enc.cur = SvPVX (enc.sv);
403	enc.end = SvEND (enc.sv);	633	enc.end = SvEND (enc.sv);
404	enc.depth = 0;
405		634
406	SvPOK_only (enc.sv);	635	SvPOK_only (enc.sv);
		636
		637	if (cbor->flags & F_PACK_STRINGS)
		638	{
		639	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		640	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		641	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		642	}
		643
407	encode_sv (&enc, scalar);	644	encode_sv (&enc, scalar);
408		645
409	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	646	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
410	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	647	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
411		648
…		…
425	U8 *end; // end of input string	662	U8 *end; // end of input string
426	const char *err; // parse error, if != 0	663	const char *err; // parse error, if != 0
427	CBOR cbor;	664	CBOR cbor;
428	U32 depth; // recursion depth	665	U32 depth; // recursion depth
429	U32 maxdepth; // recursion depth limit	666	U32 maxdepth; // recursion depth limit
		667	AV *shareable;
		668	AV *stringref;
		669	SV *decode_tagged;
		670	SV *err_sv; // optional sv for error, needs to be freed
430	} dec_t;	671	} dec_t;
431		672
432	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	673	// set dec->err to ERRSV
		674	ecb_cold static void
		675	err_errsv (dec_t *dec)
		676	{
		677	if (!dec->err)
		678	{
		679	dec->err_sv = newSVsv (ERRSV);
433		680
434	#define WANT(len) if (expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data");	681	// chop off the trailing \n
		682	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		683	*SvEND (dec->err_sv) = 0;
435		684
		685	dec->err = SvPVutf8_nolen (dec->err_sv);
		686	}
		687	}
		688
		689	// the following functions are used to reduce code size and help the compiler to optimise
		690	ecb_cold static void
		691	err_set (dec_t *dec, const char *reason)
		692	{
		693	if (!dec->err)
		694	dec->err = reason;
		695	}
		696
		697	ecb_cold static void
		698	err_unexpected_end (dec_t *dec)
		699	{
		700	err_set (dec, "unexpected end of CBOR data");
		701	}
		702
		703	ecb_cold static void
		704	err_nesting_exceeded (dec_t *dec)
		705	{
		706	err_set (dec, ERR_NESTING_EXCEEDED);
		707	}
		708
		709	#define ERR_DO(do) SB do; goto fail; SE
		710	#define ERR(reason) ERR_DO (err_set (dec, reason))
		711	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		712
		713	#define WANT(len) if (ecb_expect_false ((UV)(dec->end - dec->cur) < (UV)len)) ERR_DO (err_unexpected_end (dec))
		714
436	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	715	#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED)
437	#define DEC_DEC_DEPTH --dec->depth	716	#define DEC_DEC_DEPTH --dec->depth
438		717
439	static UV	718	static UV
440	decode_uint (dec_t *dec)	719	decode_uint (dec_t *dec)
441	{	720	{
442	switch (*dec->cur & 31)	721	U8 m = *dec->cur & MINOR_MASK;
443	{	722	++dec->cur;
444	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
445	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
446	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
447	return *dec->cur++ & 31;
448		723
449	case 24:	724	if (ecb_expect_true (m < LENGTH_EXT1))
		725	return m;
		726	else if (ecb_expect_true (m == LENGTH_EXT1))
		727	{
450	WANT (2);	728	WANT (1);
451	dec->cur += 2;	729	dec->cur += 1;
452	return dec->cur[-1];	730	return dec->cur[-1];
453		731	}
454	case 25:	732	else if (ecb_expect_true (m == LENGTH_EXT2))
		733	{
455	WANT (3);	734	WANT (2);
456	dec->cur += 3;	735	dec->cur += 2;
457	return (((UV)dec->cur[-2]) << 8)	736	return (((UV)dec->cur[-2]) << 8)
458	| ((UV)dec->cur[-1]);	737	| ((UV)dec->cur[-1]);
459		738	}
460	case 26:	739	else if (ecb_expect_true (m == LENGTH_EXT4))
		740	{
461	WANT (5);	741	WANT (4);
462	dec->cur += 5;	742	dec->cur += 4;
463	return (((UV)dec->cur[-4]) << 24)	743	return (((UV)dec->cur[-4]) << 24)
464	| (((UV)dec->cur[-3]) << 16)	744	| (((UV)dec->cur[-3]) << 16)
465	| (((UV)dec->cur[-2]) << 8)	745	| (((UV)dec->cur[-2]) << 8)
466	| ((UV)dec->cur[-1]);	746	| ((UV)dec->cur[-1]);
467		747	}
468	case 27:	748	else if (ecb_expect_true (m == LENGTH_EXT8))
		749	{
469	WANT (9);	750	WANT (8);
470	dec->cur += 9;	751	dec->cur += 8;
		752
		753	return
		754	#if UVSIZE < 8
		755	0
		756	#else
471	return (((UV)dec->cur[-8]) << 56)	757	(((UV)dec->cur[-8]) << 56)
472	| (((UV)dec->cur[-7]) << 48)	758	| (((UV)dec->cur[-7]) << 48)
473	| (((UV)dec->cur[-6]) << 40)	759	| (((UV)dec->cur[-6]) << 40)
474	| (((UV)dec->cur[-5]) << 32)	760	| (((UV)dec->cur[-5]) << 32)
		761	#endif
475	| (((UV)dec->cur[-4]) << 24)	762	| (((UV)dec->cur[-4]) << 24)
476	| (((UV)dec->cur[-3]) << 16)	763	| (((UV)dec->cur[-3]) << 16)
477	| (((UV)dec->cur[-2]) << 8)	764	| (((UV)dec->cur[-2]) << 8)
478	| ((UV)dec->cur[-1]);	765	| ((UV)dec->cur[-1]);
479		766	}
480	default:	767	else
481	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	768	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
482	}
483		769
484	fail:	770	fail:
485	return 0;	771	return 0;
486	}	772	}
487		773
…		…
492	{	778	{
493	AV *av = newAV ();	779	AV *av = newAV ();
494		780
495	DEC_INC_DEPTH;	781	DEC_INC_DEPTH;
496		782
497	if ((*dec->cur & 31) == 31)	783	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
498	{	784	{
499	++dec->cur;	785	++dec->cur;
500		786
501	for (;;)	787	for (;;)
502	{	788	{
503	WANT (1);	789	WANT (1);
504		790
505	if (*dec->cur == (0xe0 | 31))	791	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
506	{	792	{
507	++dec->cur;	793	++dec->cur;
508	break;	794	break;
509	}	795	}
510		796
511	av_push (av, decode_sv (dec));	797	av_push (av, decode_sv (dec));
512	}	798	}
513	}	799	}
514	else	800	else
515	{	801	{
516	int i, len = decode_uint (dec);	802	UV i, len = decode_uint (dec);
517		803
		804	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
518	av_fill (av, len - 1);	805	av_fill (av, len - 1);
519		806
520	for (i = 0; i < len; ++i)	807	for (i = 0; i < len; ++i)
521	AvARRAY (av)[i] = decode_sv (dec);	808	AvARRAY (av)[i] = decode_sv (dec);
522	}	809	}
…		…
528	SvREFCNT_dec (av);	815	SvREFCNT_dec (av);
529	DEC_DEC_DEPTH;	816	DEC_DEC_DEPTH;
530	return &PL_sv_undef;	817	return &PL_sv_undef;
531	}	818	}
532		819
		820	static void
		821	decode_he (dec_t *dec, HV *hv)
		822	{
		823	// for speed reasons, we specialcase single-string
		824	// byte or utf-8 strings as keys, but only when !stringref
		825
		826	if (ecb_expect_true (!dec->stringref))
		827	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		828	{
		829	STRLEN len = decode_uint (dec);
		830	char *key = (char *)dec->cur;
		831
		832	WANT (len);
		833	dec->cur += len;
		834
		835	hv_store (hv, key, len, decode_sv (dec), 0);
		836
		837	return;
		838	}
		839	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		840	{
		841	STRLEN len = decode_uint (dec);
		842	char *key = (char *)dec->cur;
		843
		844	WANT (len);
		845	dec->cur += len;
		846
		847	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		848	if (!is_utf8_string (key, len))
		849	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		850
		851	hv_store (hv, key, -len, decode_sv (dec), 0);
		852
		853	return;
		854	}
		855
		856	SV *k = decode_sv (dec);
		857	SV *v = decode_sv (dec);
		858
		859	// we leak memory if uncaught exceptions are thrown by random magical
		860	// methods, and this is hopefully the only place where it can happen,
		861	// so if there is a chance of an exception, take the very slow path.
		862	// since catching exceptions is "undocumented/internal/forbidden" by
		863	// the new p5p powers, we need to call out to a perl function :/
		864	if (ecb_expect_false (SvAMAGIC (k)))
		865	{
		866	dSP;
		867
		868	ENTER; SAVETMPS;
		869	PUSHMARK (SP);
		870	EXTEND (SP, 3);
		871	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		872	PUSHs (sv_2mortal (k));
		873	PUSHs (sv_2mortal (v));
		874
		875	PUTBACK;
		876	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		877	SPAGAIN;
		878
		879	FREETMPS; LEAVE;
		880
		881	if (SvTRUE (ERRSV))
		882	ERR_ERRSV;
		883
		884	return;
		885	}
		886
		887	hv_store_ent (hv, k, v, 0);
		888	SvREFCNT_dec (k);
		889
		890	fail:
		891	;
		892	}
		893
533	static SV *	894	static SV *
534	decode_hv (dec_t *dec)	895	decode_hv (dec_t *dec)
535	{	896	{
536	HV *hv = newHV ();	897	HV *hv = newHV ();
537		898
538	DEC_INC_DEPTH;	899	DEC_INC_DEPTH;
539		900
540	if ((*dec->cur & 31) == 31)	901	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
541	{	902	{
542	++dec->cur;	903	++dec->cur;
543		904
544	for (;;)	905	for (;;)
545	{	906	{
546	WANT (1);	907	WANT (1);
547		908
548	if (*dec->cur == (0xe0 | 31))	909	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
549	{	910	{
550	++dec->cur;	911	++dec->cur;
551	break;	912	break;
552	}	913	}
553		914
554	SV *k = decode_sv (dec);	915	decode_he (dec, hv);
555	SV *v = decode_sv (dec);
556
557	hv_store_ent (hv, k, v, 0);
558	}	916	}
559	}	917	}
560	else	918	else
561	{	919	{
562	int len = decode_uint (dec);	920	UV pairs = decode_uint (dec);
563		921
		922	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		923
564	while (len--)	924	while (pairs--)
565	{	925	decode_he (dec, hv);
566	SV *k = decode_sv (dec);
567	SV *v = decode_sv (dec);
568
569	hv_store_ent (hv, k, v, 0);
570	}
571	}	926	}
572		927
573	DEC_DEC_DEPTH;	928	DEC_DEC_DEPTH;
574	return newRV_noinc ((SV *)hv);	929	return newRV_noinc ((SV *)hv);
575
576	#if 0
577	SV *sv;
578	HV *hv = newHV ();
579
580	DEC_INC_DEPTH;
581	decode_ws (dec);
582
583	for (;;)
584	{
585	// heuristic: assume that
586	// a) decode_str + hv_store_ent are abysmally slow.
587	// b) most hash keys are short, simple ascii text.
588	// => try to "fast-match" such strings to avoid
589	// the overhead of decode_str + hv_store_ent.
590	{
591	SV *value;
592	char *p = dec->cur;
593	char *e = p + 24; // only try up to 24 bytes
594
595	for (;;)
596	{
597	// the >= 0x80 is false on most architectures
598	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
599	{
600	// slow path, back up and use decode_str
601	SV *key = decode_str (dec);
602	if (!key)
603	goto fail;
604
605	decode_ws (dec); EXPECT_CH (':');
606
607	decode_ws (dec);
608	value = decode_sv (dec);
609	if (!value)
610	{
611	SvREFCNT_dec (key);
612	goto fail;
613	}
614
615	hv_store_ent (hv, key, value, 0);
616	SvREFCNT_dec (key);
617
618	break;
619	}
620	else if (*p == '"')
621	{
622	// fast path, got a simple key
623	char *key = dec->cur;
624	int len = p - key;
625	dec->cur = p + 1;
626
627	decode_ws (dec); EXPECT_CH (':');
628
629	decode_ws (dec);
630	value = decode_sv (dec);
631	if (!value)
632	goto fail;
633
634	hv_store (hv, key, len, value, 0);
635
636	break;
637	}
638
639	++p;
640	}
641	}
642
643	decode_ws (dec);
644
645	if (*dec->cur == '}')
646	{
647	++dec->cur;
648	break;
649	}
650
651	if (*dec->cur != ',')
652	ERR (", or } expected while parsing object/hash");
653
654	++dec->cur;
655
656	decode_ws (dec);
657
658	if (*dec->cur == '}' && dec->cbor.flags & F_RELAXED)
659	{
660	++dec->cur;
661	break;
662	}
663	}
664
665	DEC_DEC_DEPTH;
666	sv = newRV_noinc ((SV *)hv);
667
668	// check filter callbacks
669	if (dec->cbor.flags & F_HOOK)
670	{
671	if (dec->cbor.cb_sk_object && HvKEYS (hv) == 1)
672	{
673	HE *cb, *he;
674
675	hv_iterinit (hv);
676	he = hv_iternext (hv);
677	hv_iterinit (hv);
678
679	// the next line creates a mortal sv each time its called.
680	// might want to optimise this for common cases.
681	cb = hv_fetch_ent (dec->cbor.cb_sk_object, hv_iterkeysv (he), 0, 0);
682
683	if (cb)
684	{
685	dSP;
686	int count;
687
688	ENTER; SAVETMPS; PUSHMARK (SP);
689	XPUSHs (HeVAL (he));
690	sv_2mortal (sv);
691
692	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
693
694	if (count == 1)
695	{
696	sv = newSVsv (POPs);
697	FREETMPS; LEAVE;
698	return sv;
699	}
700
701	SvREFCNT_inc (sv);
702	FREETMPS; LEAVE;
703	}
704	}
705
706	if (dec->cbor.cb_object)
707	{
708	dSP;
709	int count;
710
711	ENTER; SAVETMPS; PUSHMARK (SP);
712	XPUSHs (sv_2mortal (sv));
713
714	PUTBACK; count = call_sv (dec->cbor.cb_object, G_ARRAY); SPAGAIN;
715
716	if (count == 1)
717	{
718	sv = newSVsv (POPs);
719	FREETMPS; LEAVE;
720	return sv;
721	}
722
723	SvREFCNT_inc (sv);
724	FREETMPS; LEAVE;
725	}
726	}
727
728	return sv;
729	#endif
730		930
731	fail:	931	fail:
732	SvREFCNT_dec (hv);	932	SvREFCNT_dec (hv);
733	DEC_DEC_DEPTH;	933	DEC_DEC_DEPTH;
734	return &PL_sv_undef;	934	return &PL_sv_undef;
735	}	935	}
736		936
737	static SV *	937	static SV *
738	decode_str (dec_t *dec, int utf8)	938	decode_str (dec_t *dec, int utf8)
739	{	939	{
740	SV *sv;	940	SV *sv = 0;
741		941
742	if ((*dec->cur & 31) == 31)	942	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
743	{	943	{
		944	// indefinite length strings
744	++dec->cur;	945	++dec->cur;
745		946
		947	U8 major = *dec->cur & MAJOR_MISC;
		948
746	sv = newSVpvn ("", 0);	949	sv = newSVpvn ("", 0);
747		950
748	// not very fast, and certainly not robust against illegal input
749	for (;;)	951	for (;;)
750	{	952	{
751	WANT (1);	953	WANT (1);
752		954
753	if (*dec->cur == (0xe0 | 31))	955	if ((*dec->cur - major) > LENGTH_EXT8)
		956	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
754	{	957	{
755	++dec->cur;	958	++dec->cur;
756	break;	959	break;
757	}	960	}
		961	else
		962	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
758		963
759	SV *sv2 = decode_sv (dec);	964	STRLEN len = decode_uint (dec);
760	sv_catsv (sv, sv2);	965
		966	WANT (len);
		967	sv_catpvn (sv, dec->cur, len);
		968	dec->cur += len;
761	}	969	}
762	}	970	}
763	else	971	else
764	{	972	{
765	STRLEN len = decode_uint (dec);	973	STRLEN len = decode_uint (dec);
766		974
767	WANT (len);	975	WANT (len);
768	sv = newSVpvn (dec->cur, len);	976	sv = newSVpvn (dec->cur, len);
769	dec->cur += len;	977	dec->cur += len;
		978
		979	if (ecb_expect_false (dec->stringref)
		980	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		981	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
770	}	982	}
771		983
772	if (utf8)	984	if (utf8)
		985	{
		986	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		987	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		988	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		989
773	SvUTF8_on (sv);	990	SvUTF8_on (sv);
		991	}
774		992
775	return sv;	993	return sv;
776		994
777	fail:	995	fail:
		996	SvREFCNT_dec (sv);
778	return &PL_sv_undef;	997	return &PL_sv_undef;
779	}	998	}
780		999
781	static SV *	1000	static SV *
782	decode_tagged (dec_t *dec)	1001	decode_tagged (dec_t *dec)
783	{	1002	{
		1003	SV *sv = 0;
784	UV tag = decode_uint (dec);	1004	UV tag = decode_uint (dec);
		1005
		1006	WANT (1);
		1007
		1008	switch (tag)
		1009	{
		1010	case CBOR_TAG_MAGIC:
785	SV *sv = decode_sv (dec);	1011	sv = decode_sv (dec);
		1012	break;
786		1013
787	if (tag == 55799) // 2.4.5 Self-Describe CBOR	1014	case CBOR_TAG_INDIRECTION:
		1015	sv = newRV_noinc (decode_sv (dec));
		1016	break;
		1017
		1018	case CBOR_TAG_STRINGREF_NAMESPACE:
		1019	{
		1020	// do nmot use SAVETMPS/FREETMPS, as these will
		1021	// erase mortalised caches, e.g. "shareable"
		1022	ENTER;
		1023
		1024	SAVESPTR (dec->stringref);
		1025	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1026
		1027	sv = decode_sv (dec);
		1028
		1029	LEAVE;
		1030	}
		1031	break;
		1032
		1033	case CBOR_TAG_STRINGREF:
		1034	{
		1035	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1036	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1037
		1038	UV idx = decode_uint (dec);
		1039
		1040	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		1041	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1042
		1043	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1044	}
		1045	break;
		1046
		1047	case CBOR_TAG_VALUE_SHAREABLE:
		1048	{
		1049	if (ecb_expect_false (!dec->shareable))
		1050	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1051
		1052	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1053	{
		1054	sv = newSV (0);
		1055	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1056
		1057	SV *osv = decode_sv (dec);
		1058	sv_setsv (sv, osv);
		1059	SvREFCNT_dec_NN (osv);
		1060	}
		1061	else
		1062	{
		1063	av_push (dec->shareable, &PL_sv_undef);
		1064	int idx = AvFILLp (dec->shareable);
		1065	sv = decode_sv (dec);
		1066	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1067	}
		1068	}
		1069	break;
		1070
		1071	case CBOR_TAG_VALUE_SHAREDREF:
		1072	{
		1073	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1074	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1075
		1076	UV idx = decode_uint (dec);
		1077
		1078	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		1079	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1080
		1081	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1082
		1083	if (sv == &PL_sv_undef)
		1084	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1085	}
		1086	break;
		1087
		1088	case CBOR_TAG_PERL_OBJECT:
		1089	{
		1090	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1091	goto filter;
		1092
		1093	sv = decode_sv (dec);
		1094
		1095	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1096	ERR ("corrupted CBOR data (non-array perl object)");
		1097
		1098	AV *av = (AV *)SvRV (sv);
		1099	int len = av_len (av) + 1;
		1100	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1101
		1102	if (!stash)
		1103	ERR ("cannot decode perl-object (package does not exist)");
		1104
		1105	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1106
		1107	if (!method)
		1108	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1109
		1110	dSP;
		1111
		1112	ENTER; SAVETMPS;
		1113	PUSHMARK (SP);
		1114	EXTEND (SP, len + 1);
		1115	// we re-bless the reference to get overload and other niceties right
		1116	PUSHs (*av_fetch (av, 0, 1));
		1117	PUSHs (sv_cbor);
		1118
		1119	int i;
		1120
		1121	for (i = 1; i < len; ++i)
		1122	PUSHs (*av_fetch (av, i, 1));
		1123
		1124	PUTBACK;
		1125	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1126	SPAGAIN;
		1127
		1128	if (SvTRUE (ERRSV))
		1129	{
		1130	FREETMPS; LEAVE;
		1131	ERR_ERRSV;
		1132	}
		1133
		1134	SvREFCNT_dec (sv);
		1135	sv = SvREFCNT_inc (POPs);
		1136
		1137	PUTBACK;
		1138
		1139	FREETMPS; LEAVE;
		1140	}
		1141	break;
		1142
		1143	default:
		1144	filter:
		1145	{
		1146	SV *tag_sv = newSVuv (tag);
		1147
		1148	sv = decode_sv (dec);
		1149
		1150	dSP;
		1151	ENTER; SAVETMPS;
		1152	SAVESTACK_POS ();
		1153	PUSHMARK (SP);
		1154	EXTEND (SP, 2);
		1155	PUSHs (tag_sv);
		1156	PUSHs (sv);
		1157
		1158	PUTBACK;
		1159	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1160	SPAGAIN;
		1161
		1162	if (SvTRUE (ERRSV))
		1163	{
		1164	SvREFCNT_dec (tag_sv);
		1165	FREETMPS; LEAVE;
		1166	ERR_ERRSV;
		1167	}
		1168
		1169	if (count)
		1170	{
		1171	SvREFCNT_dec (tag_sv);
		1172	SvREFCNT_dec (sv);
		1173	sv = SvREFCNT_inc (POPs);
		1174	}
		1175	else
		1176	{
		1177	AV *av = newAV ();
		1178	av_push (av, tag_sv);
		1179	av_push (av, sv);
		1180
		1181	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1182	? cbor_tagged_stash
		1183	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1184	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1185	}
		1186
		1187	PUTBACK;
		1188
		1189	FREETMPS; LEAVE;
		1190	}
		1191	break;
		1192	}
		1193
788	return sv;	1194	return sv;
789		1195
790	AV *av = newAV ();	1196	fail:
791	av_push (av, newSVuv (tag));	1197	SvREFCNT_dec (sv);
792	av_push (av, sv);	1198	return &PL_sv_undef;
793	return newRV_noinc ((SV *)av);
794	}	1199	}
795		1200
796	static SV *	1201	static SV *
797	decode_sv (dec_t *dec)	1202	decode_sv (dec_t *dec)
798	{	1203	{
799	WANT (1);	1204	WANT (1);
800		1205
801	switch (*dec->cur >> 5)	1206	switch (*dec->cur >> MAJOR_SHIFT)
802	{	1207	{
803	case 0: // unsigned int	1208	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
804	//TODO: 64 bit values on 3 2bit perls	1209	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
805	return newSVuv (decode_uint (dec));	1210	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
806	case 1: // negative int	1211	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
807	return newSViv (-1 - (IV)decode_uint (dec));	1212	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
808	case 2: // octet string	1213	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
809	return decode_str (dec, 0);	1214	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
810	case 3: // utf-8 string	1215
811	return decode_str (dec, 1);	1216	case MAJOR_MISC >> MAJOR_SHIFT:
812	case 4: // array
813	return decode_av (dec);
814	case 5: // map
815	return decode_hv (dec);
816	case 6: // tag
817	return decode_tagged (dec);
818	case 7: // misc
819	switch (*dec->cur++ & 31)	1217	switch (*dec->cur++ & MINOR_MASK)
820	{	1218	{
821	case 20:	1219	case SIMPLE_FALSE:
822	#if CBOR_SLOW	1220	#if CBOR_SLOW
823	cbor_false = get_bool ("CBOR::XS::false");	1221	types_false = get_bool ("Types::Serialiser::false");
824	#endif	1222	#endif
825	return newSVsv (cbor_false);	1223	return newSVsv (types_false);
826	case 21:	1224	case SIMPLE_TRUE:
827	#if CBOR_SLOW	1225	#if CBOR_SLOW
828	cbor_true = get_bool ("CBOR::XS::true");	1226	types_true = get_bool ("Types::Serialiser::true");
829	#endif	1227	#endif
830	return newSVsv (cbor_true);	1228	return newSVsv (types_true);
831	case 22:	1229	case SIMPLE_NULL:
832	return newSVsv (&PL_sv_undef);	1230	return newSVsv (&PL_sv_undef);
		1231	case SIMPLE_UNDEF:
		1232	#if CBOR_SLOW
		1233	types_error = get_bool ("Types::Serialiser::error");
		1234	#endif
		1235	return newSVsv (types_error);
833		1236
834	case 25:	1237	case MISC_FLOAT16:
835	{	1238	{
836	WANT (2);	1239	WANT (2);
837		1240
838	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1241	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
839	dec->cur += 2;	1242	dec->cur += 2;
840		1243
841	return newSVnv (ecb_binary16_to_float (fp));	1244	return newSVnv (ecb_binary16_to_float (fp));
842	}	1245	}
843		1246
844	case 26:	1247	case MISC_FLOAT32:
845	{	1248	{
846	uint32_t fp;	1249	uint32_t fp;
847	WANT (4);	1250	WANT (4);
848	memcpy (&fp, dec->cur, 4);	1251	memcpy (&fp, dec->cur, 4);
849	dec->cur += 4;	1252	dec->cur += 4;
…		…
852	fp = ecb_bswap32 (fp);	1255	fp = ecb_bswap32 (fp);
853		1256
854	return newSVnv (ecb_binary32_to_float (fp));	1257	return newSVnv (ecb_binary32_to_float (fp));
855	}	1258	}
856		1259
857	case 27:	1260	case MISC_FLOAT64:
858	{	1261	{
859	uint64_t fp;	1262	uint64_t fp;
860	WANT (8);	1263	WANT (8);
861	memcpy (&fp, dec->cur, 8);	1264	memcpy (&fp, dec->cur, 8);
862	dec->cur += 8;	1265	dec->cur += 8;
…		…
865	fp = ecb_bswap64 (fp);	1268	fp = ecb_bswap64 (fp);
866		1269
867	return newSVnv (ecb_binary64_to_double (fp));	1270	return newSVnv (ecb_binary64_to_double (fp));
868	}	1271	}
869		1272
870	// 0..19 unassigned	1273	// 0..19 unassigned simple
871	// 24 reserved + unassigned (reserved values are not encodable)	1274	// 24 reserved + unassigned simple (reserved values are not encodable)
		1275	// 28-30 unassigned misc
		1276	// 31 break code
872	default:	1277	default:
873	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1278	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
874	}	1279	}
875		1280
876	break;	1281	break;
877	}	1282	}
878	#if 0
879	switch (*dec->cur)
880	{
881	//case '"': ++dec->cur; return decode_str (dec);
882	case '[': ++dec->cur; return decode_av (dec);
883	case '{': ++dec->cur; return decode_hv (dec);
884
885	case '-':
886	case '0': case '1': case '2': case '3': case '4':
887	case '5': case '6': case '7': case '8': case '9':
888	//TODO return decode_num (dec);
889
890	case 't':
891	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
892	{
893	dec->cur += 4;
894	#if CBOR_SLOW
895	cbor_true = get_bool ("CBOR::XS::true");
896	#endif
897	return newSVsv (cbor_true);
898	}
899	else
900	ERR ("'true' expected");
901
902	break;
903
904	case 'f':
905	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
906	{
907	dec->cur += 5;
908	#if CBOR_SLOW
909	cbor_false = get_bool ("CBOR::XS::false");
910	#endif
911	return newSVsv (cbor_false);
912	}
913	else
914	ERR ("'false' expected");
915
916	break;
917
918	case 'n':
919	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
920	{
921	dec->cur += 4;
922	return newSVsv (&PL_sv_undef);
923	}
924	else
925	ERR ("'null' expected");
926
927	break;
928
929	default:
930	ERR ("malformed CBOR string, neither array, object, number, string or atom");
931	break;
932	}
933	#endif
934		1283
935	fail:	1284	fail:
936	return &PL_sv_undef;	1285	return &PL_sv_undef;
937	}	1286	}
938		1287
939	static SV *	1288	static SV *
940	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1289	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
941	{	1290	{
942	dec_t dec;	1291	dec_t dec = { 0 };
943	SV *sv;	1292	SV *sv;
		1293	STRLEN len;
		1294	char *data = SvPVbyte (string, len);
944		1295
945	/* work around bugs in 5.10 where manipulating magic values
946	* makes perl ignore the magic in subsequent accesses.
947	* also make a copy of non-PV values, to get them into a clean
948	* state (SvPV should do that, but it's buggy, see below).
949	*/
950	/*SvGETMAGIC (string);*/
951	if (SvMAGICAL (string) || !SvPOK (string))
952	string = sv_2mortal (newSVsv (string));
953
954	SvUPGRADE (string, SVt_PV);
955
956	/* work around a bug in perl 5.10, which causes SvCUR to fail an
957	* assertion with -DDEBUGGING, although SvCUR is documented to
958	* return the xpv_cur field which certainly exists after upgrading.
959	* according to nicholas clark, calling SvPOK fixes this.
960	* But it doesn't fix it, so try another workaround, call SvPV_nolen
961	* and hope for the best.
962	* Damnit, SvPV_nolen still trips over yet another assertion. This
963	* assertion business is seriously broken, try yet another workaround
964	* for the broken -DDEBUGGING.
965	*/
966	{
967	#ifdef DEBUGGING
968	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
969	#else
970	STRLEN offset = SvCUR (string);
971	#endif
972
973	if (offset > cbor->max_size && cbor->max_size)	1296	if (len > cbor->max_size && cbor->max_size)
974	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1297	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
975	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1298	(unsigned long)len, (unsigned long)cbor->max_size);
976	}
977
978	sv_utf8_downgrade (string, 0);
979		1299
980	dec.cbor = *cbor;	1300	dec.cbor = *cbor;
981	dec.cur = (U8 *)SvPVX (string);	1301	dec.cur = (U8 *)data;
982	dec.end = (U8 *)SvEND (string);	1302	dec.end = (U8 *)data + len;
983	dec.err = 0;
984	dec.depth = 0;
985
986	if (dec.cbor.cb_object || dec.cbor.cb_sk_object)
987	;//TODO dec.cbor.flags |= F_HOOK;
988		1303
989	sv = decode_sv (&dec);	1304	sv = decode_sv (&dec);
990		1305
991	if (offset_return)	1306	if (offset_return)
992	*offset_return = dec.cur;	1307	*offset_return = dec.cur;
…		…
995	if (dec.cur != dec.end && !dec.err)	1310	if (dec.cur != dec.end && !dec.err)
996	dec.err = "garbage after CBOR object";	1311	dec.err = "garbage after CBOR object";
997		1312
998	if (dec.err)	1313	if (dec.err)
999	{	1314	{
		1315	if (dec.shareable)
		1316	{
		1317	// need to break cyclic links, which would all be in shareable
		1318	int i;
		1319	SV **svp;
		1320
		1321	for (i = av_len (dec.shareable) + 1; i--; )
		1322	if ((svp = av_fetch (dec.shareable, i, 0)))
		1323	sv_setsv (*svp, &PL_sv_undef);
		1324	}
		1325
1000	SvREFCNT_dec (sv);	1326	SvREFCNT_dec (sv);
		1327
		1328	if (dec.err_sv)
		1329	sv_2mortal (dec.err_sv);
		1330
1001	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1331	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
1002	}	1332	}
1003		1333
1004	sv = sv_2mortal (sv);	1334	sv = sv_2mortal (sv);
1005		1335
1006	return sv;	1336	return sv;
1007	}	1337	}
1008		1338
		1339	/////////////////////////////////////////////////////////////////////////////
		1340	// incremental parser
		1341
		1342	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1343
		1344	// returns 0 for notyet, 1 for success or error
		1345	static int
		1346	incr_parse (CBOR *self, SV *cborstr)
		1347	{
		1348	STRLEN cur;
		1349	SvPV (cborstr, cur);
		1350
		1351	while (ecb_expect_true (self->incr_need <= cur))
		1352	{
		1353	// table of integer count bytes
		1354	static I8 incr_len[MINOR_MASK + 1] = {
		1355	0, 0, 0, 0, 0, 0, 0, 0,
		1356	0, 0, 0, 0, 0, 0, 0, 0,
		1357	0, 0, 0, 0, 0, 0, 0, 0,
		1358	1, 2, 4, 8,-1,-1,-1,-2
		1359	};
		1360
		1361	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1362	U8 m = *p & MINOR_MASK;
		1363	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1364	I8 ilen = incr_len[m];
		1365
		1366	self->incr_need = self->incr_pos + 1;
		1367
		1368	if (ecb_expect_false (ilen < 0))
		1369	{
		1370	if (m != MINOR_INDEF)
		1371	return 1; // error
		1372
		1373	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1374	{
		1375	if (count >= 0)
		1376	return 1; // error
		1377
		1378	count = 1;
		1379	}
		1380	else
		1381	{
		1382	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1383	count = -1;
		1384	}
		1385	}
		1386	else
		1387	{
		1388	self->incr_need += ilen;
		1389	if (ecb_expect_false (self->incr_need > cur))
		1390	return 0;
		1391
		1392	int major = *p >> MAJOR_SHIFT;
		1393
		1394	switch (major)
		1395	{
		1396	case MAJOR_TAG >> MAJOR_SHIFT:
		1397	++count; // tags merely prefix another value
		1398	break;
		1399
		1400	case MAJOR_BYTES >> MAJOR_SHIFT:
		1401	case MAJOR_TEXT >> MAJOR_SHIFT:
		1402	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1403	case MAJOR_MAP >> MAJOR_SHIFT:
		1404	{
		1405	UV len;
		1406
		1407	if (ecb_expect_false (ilen))
		1408	{
		1409	len = 0;
		1410
		1411	do {
		1412	len = (len << 8) | *++p;
		1413	} while (--ilen);
		1414	}
		1415	else
		1416	len = m;
		1417
		1418	switch (major)
		1419	{
		1420	case MAJOR_BYTES >> MAJOR_SHIFT:
		1421	case MAJOR_TEXT >> MAJOR_SHIFT:
		1422	self->incr_need += len;
		1423	if (ecb_expect_false (self->incr_need > cur))
		1424	return 0;
		1425
		1426	break;
		1427
		1428	case MAJOR_MAP >> MAJOR_SHIFT:
		1429	len <<= 1;
		1430	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1431	if (len)
		1432	{
		1433	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1434	count = len + 1;
		1435	}
		1436	break;
		1437	}
		1438	}
		1439	}
		1440	}
		1441
		1442	self->incr_pos = self->incr_need;
		1443
		1444	if (count > 0)
		1445	{
		1446	while (!--count)
		1447	{
		1448	if (!AvFILLp (self->incr_count))
		1449	return 1; // done
		1450
		1451	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1452	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1453	}
		1454
		1455	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1456	}
		1457	}
		1458
		1459	return 0;
		1460	}
		1461
		1462
1009	/////////////////////////////////////////////////////////////////////////////	1463	/////////////////////////////////////////////////////////////////////////////
1010	// XS interface functions	1464	// XS interface functions
1011		1465
1012	MODULE = CBOR::XS PACKAGE = CBOR::XS	1466	MODULE = CBOR::XS PACKAGE = CBOR::XS
1013		1467
1014	BOOT:	1468	BOOT:
1015	{	1469	{
1016	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1470	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1017	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1471	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1018		1472
1019	cbor_true = get_bool ("CBOR::XS::true");	1473	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1020	cbor_false = get_bool ("CBOR::XS::false");	1474	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1475
		1476	types_true = get_bool ("Types::Serialiser::true" );
		1477	types_false = get_bool ("Types::Serialiser::false");
		1478	types_error = get_bool ("Types::Serialiser::error");
		1479
		1480	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1481
		1482	sv_cbor = newSVpv ("CBOR", 0);
		1483	SvREADONLY_on (sv_cbor);
		1484
		1485	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
1021	}	1486	}
1022		1487
1023	PROTOTYPES: DISABLE	1488	PROTOTYPES: DISABLE
1024		1489
1025	void CLONE (...)	1490	void CLONE (...)
1026	CODE:	1491	CODE:
1027	cbor_stash = 0;	1492	cbor_stash = 0;
		1493	cbor_tagged_stash = 0;
		1494	types_error_stash = 0;
1028	cbor_boolean_stash = 0;	1495	types_boolean_stash = 0;
1029		1496
1030	void new (char *klass)	1497	void new (char *klass)
1031	PPCODE:	1498	PPCODE:
1032	{	1499	{
1033	SV *pv = NEWSV (0, sizeof (CBOR));	1500	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1041		1508
1042	void shrink (CBOR *self, int enable = 1)	1509	void shrink (CBOR *self, int enable = 1)
1043	ALIAS:	1510	ALIAS:
1044	shrink = F_SHRINK	1511	shrink = F_SHRINK
1045	allow_unknown = F_ALLOW_UNKNOWN	1512	allow_unknown = F_ALLOW_UNKNOWN
		1513	allow_sharing = F_ALLOW_SHARING
		1514	allow_cycles = F_ALLOW_CYCLES
		1515	forbid_objects = F_FORBID_OBJECTS
		1516	pack_strings = F_PACK_STRINGS
		1517	text_keys = F_TEXT_KEYS
		1518	text_strings = F_TEXT_STRINGS
		1519	validate_utf8 = F_VALIDATE_UTF8
1046	PPCODE:	1520	PPCODE:
1047	{	1521	{
1048	if (enable)	1522	if (enable)
1049	self->flags |= ix;	1523	self->flags |= ix;
1050	else	1524	else
…		…
1055		1529
1056	void get_shrink (CBOR *self)	1530	void get_shrink (CBOR *self)
1057	ALIAS:	1531	ALIAS:
1058	get_shrink = F_SHRINK	1532	get_shrink = F_SHRINK
1059	get_allow_unknown = F_ALLOW_UNKNOWN	1533	get_allow_unknown = F_ALLOW_UNKNOWN
		1534	get_allow_sharing = F_ALLOW_SHARING
		1535	get_allow_cycles = F_ALLOW_CYCLES
		1536	get_forbid_objects = F_FORBID_OBJECTS
		1537	get_pack_strings = F_PACK_STRINGS
		1538	get_text_keys = F_TEXT_KEYS
		1539	get_text_strings = F_TEXT_STRINGS
		1540	get_validate_utf8 = F_VALIDATE_UTF8
1060	PPCODE:	1541	PPCODE:
1061	XPUSHs (boolSV (self->flags & ix));	1542	XPUSHs (boolSV (self->flags & ix));
1062		1543
1063	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1544	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1064	PPCODE:	1545	PPCODE:
…		…
1080	CODE:	1561	CODE:
1081	RETVAL = self->max_size;	1562	RETVAL = self->max_size;
1082	OUTPUT:	1563	OUTPUT:
1083	RETVAL	1564	RETVAL
1084		1565
1085	#if 0 //TODO	1566	void filter (CBOR *self, SV *filter = 0)
1086
1087	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1088	PPCODE:	1567	PPCODE:
1089	{
1090	SvREFCNT_dec (self->cb_object);	1568	SvREFCNT_dec (self->filter);
1091	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1569	self->filter = filter ? newSVsv (filter) : filter;
1092
1093	XPUSHs (ST (0));	1570	XPUSHs (ST (0));
1094	}
1095		1571
1096	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1572	SV *get_filter (CBOR *self)
1097	PPCODE:	1573	CODE:
1098	{	1574	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1099	if (!self->cb_sk_object)	1575	OUTPUT:
1100	self->cb_sk_object = newHV ();	1576	RETVAL
1101
1102	if (SvOK (cb))
1103	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1104	else
1105	{
1106	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1107
1108	if (!HvKEYS (self->cb_sk_object))
1109	{
1110	SvREFCNT_dec (self->cb_sk_object);
1111	self->cb_sk_object = 0;
1112	}
1113	}
1114
1115	XPUSHs (ST (0));
1116	}
1117
1118	#endif
1119		1577
1120	void encode (CBOR *self, SV *scalar)	1578	void encode (CBOR *self, SV *scalar)
1121	PPCODE:	1579	PPCODE:
1122	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1580	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1123	XPUSHs (scalar);	1581	XPUSHs (scalar);
…		…
1136	EXTEND (SP, 2);	1594	EXTEND (SP, 2);
1137	PUSHs (sv);	1595	PUSHs (sv);
1138	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1596	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1139	}	1597	}
1140		1598
		1599	void incr_parse (CBOR *self, SV *cborstr)
		1600	ALIAS:
		1601	incr_parse_multiple = 1
		1602	PPCODE:
		1603	{
		1604	if (SvUTF8 (cborstr))
		1605	sv_utf8_downgrade (cborstr, 0);
		1606
		1607	if (!self->incr_count)
		1608	{
		1609	self->incr_count = newAV ();
		1610	self->incr_pos = 0;
		1611	self->incr_need = 1;
		1612
		1613	av_push (self->incr_count, newSViv (1));
		1614	}
		1615
		1616	do
		1617	{
		1618	if (!incr_parse (self, cborstr))
		1619	{
		1620	if (self->incr_need > self->max_size && self->max_size)
		1621	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1622	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1623
		1624	break;
		1625	}
		1626
		1627	SV *sv;
		1628	char *offset;
		1629
		1630	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1631	XPUSHs (sv);
		1632
		1633	sv_chop (cborstr, offset);
		1634
		1635	av_clear (self->incr_count);
		1636	av_push (self->incr_count, newSViv (1));
		1637
		1638	self->incr_pos = 0;
		1639	self->incr_need = self->incr_pos + 1;
		1640	}
		1641	while (ix);
		1642	}
		1643
		1644	void incr_reset (CBOR *self)
		1645	CODE:
		1646	{
		1647	SvREFCNT_dec (self->incr_count);
		1648	self->incr_count = 0;
		1649	}
		1650
1141	void DESTROY (CBOR *self)	1651	void DESTROY (CBOR *self)
1142	CODE:	1652	PPCODE:
1143	SvREFCNT_dec (self->cb_sk_object);	1653	cbor_free (self);
1144	SvREFCNT_dec (self->cb_object);
1145		1654
1146	PROTOTYPES: ENABLE	1655	PROTOTYPES: ENABLE
1147		1656
1148	void encode_cbor (SV *scalar)	1657	void encode_cbor (SV *scalar)
		1658	ALIAS:
		1659	encode_cbor = 0
		1660	encode_cbor_sharing = F_ALLOW_SHARING
1149	PPCODE:	1661	PPCODE:
1150	{	1662	{
1151	CBOR cbor;	1663	CBOR cbor;
1152	cbor_init (&cbor);	1664	cbor_init (&cbor);
		1665	cbor.flags |= ix;
1153	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1666	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1154	XPUSHs (scalar);	1667	XPUSHs (scalar);
1155	}	1668	}
1156		1669
1157	void decode_cbor (SV *cborstr)	1670	void decode_cbor (SV *cborstr)

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