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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.2 by root, Sat Oct 26 10:41:12 2013 UTC vs.
Revision 1.59 by root, Fri Nov 25 23:37:27 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
14	#if defined(__BORLANDC__) || defined(_MSC_VER)	15	// compatibility with perl <5.18
15	# define snprintf _snprintf // C compilers have this in stdio.h	16	#ifndef HvNAMELEN_get
		17	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
16	#endif	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
17		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
18	#define F_SHRINK 0x00000200UL	100	#define F_SHRINK 0x00000001UL
19	#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_PACK_STRINGS 0x00000010UL
		105	#define F_TEXT_KEYS 0x00000020UL
		106	#define F_TEXT_STRINGS 0x00000040UL
		107	#define F_VALIDATE_UTF8 0x00000080UL
20		108
21	#define INIT_SIZE 32 // initial scalar size to be allocated	109	#define INIT_SIZE 32 // initial scalar size to be allocated
22		110
23	#define SB do {	111	#define SB do {
24	#define SE } while (0)	112	#define SE } while (0)
25
26	#if __GNUC__ >= 3
27	# define expect(expr,value) __builtin_expect ((expr), (value))
28	# define INLINE static inline
29	#else
30	# define expect(expr,value) (expr)
31	# define INLINE static
32	#endif
33
34	#define expect_false(expr) expect ((expr) != 0, 0)
35	#define expect_true(expr) expect ((expr) != 0, 1)
36		113
37	#define IN_RANGE_INC(type,val,beg,end) \	114	#define IN_RANGE_INC(type,val,beg,end) \
38	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \	115	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
39	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))	116	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
40		117
…		…
46	#else	123	#else
47	# define CBOR_SLOW 0	124	# define CBOR_SLOW 0
48	# define CBOR_STASH cbor_stash	125	# define CBOR_STASH cbor_stash
49	#endif	126	#endif
50		127
51	static HV *cbor_stash, *cbor_boolean_stash; // CBOR::XS::	128	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
52	static SV *cbor_true, *cbor_false;	129	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
53		130
54	typedef struct {	131	typedef struct {
55	U32 flags;	132	U32 flags;
56	U32 max_depth;	133	U32 max_depth;
57	STRLEN max_size;	134	STRLEN max_size;
		135	SV *filter;
58		136
59	SV *cb_object;	137	// for the incremental parser
60	HV *cb_sk_object;	138	STRLEN incr_pos; // the current offset into the text
		139	STRLEN incr_need; // minimum bytes needed to decode
		140	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
61	} CBOR;	141	} CBOR;
62		142
63	INLINE void	143	ecb_inline void
64	cbor_init (CBOR *cbor)	144	cbor_init (CBOR *cbor)
65	{	145	{
66	Zero (cbor, 1, CBOR);	146	Zero (cbor, 1, CBOR);
67	cbor->max_depth = 512;	147	cbor->max_depth = 512;
68	}	148	}
69		149
		150	ecb_inline void
		151	cbor_free (CBOR *cbor)
		152	{
		153	SvREFCNT_dec (cbor->filter);
		154	SvREFCNT_dec (cbor->incr_count);
		155	}
		156
70	/////////////////////////////////////////////////////////////////////////////	157	/////////////////////////////////////////////////////////////////////////////
71	// utility functions	158	// utility functions
72		159
73	INLINE SV *	160	ecb_inline SV *
74	get_bool (const char *name)	161	get_bool (const char *name)
75	{	162	{
76	SV *sv = get_sv (name, 1);	163	SV *sv = get_sv (name, 1);
77		164
78	SvREADONLY_on (sv);	165	SvREADONLY_on (sv);
79	SvREADONLY_on (SvRV (sv));	166	SvREADONLY_on (SvRV (sv));
80		167
81	return sv;	168	return sv;
82	}	169	}
83		170
84	INLINE void	171	ecb_inline void
85	shrink (SV *sv)	172	shrink (SV *sv)
86	{	173	{
87	sv_utf8_downgrade (sv, 1);	174	sv_utf8_downgrade (sv, 1);
88		175
89	if (SvLEN (sv) > SvCUR (sv) + 1)	176	if (SvLEN (sv) > SvCUR (sv) + 1)
…		…
94	SvPV_renew (sv, SvCUR (sv) + 1);	181	SvPV_renew (sv, SvCUR (sv) + 1);
95	#endif	182	#endif
96	}	183	}
97	}	184	}
98		185
99	/////////////////////////////////////////////////////////////////////////////	186	// minimum length of a string to be registered for stringref
100	// fp hell	187	ecb_inline int
101		188	minimum_string_length (UV idx)
102	//TODO	189	{
		190	return idx > 23
		191	? idx > 0xffU
		192	? idx > 0xffffU
		193	? idx > 0xffffffffU
		194	? 11
		195	: 7
		196	: 5
		197	: 4
		198	: 3;
		199	}
103		200
104	/////////////////////////////////////////////////////////////////////////////	201	/////////////////////////////////////////////////////////////////////////////
105	// encoder	202	// encoder
106		203
107	// structure used for encoding CBOR	204	// structure used for encoding CBOR
…		…
110	char *cur; // SvPVX (sv) + current output position	207	char *cur; // SvPVX (sv) + current output position
111	char *end; // SvEND (sv)	208	char *end; // SvEND (sv)
112	SV *sv; // result scalar	209	SV *sv; // result scalar
113	CBOR cbor;	210	CBOR cbor;
114	U32 depth; // recursion level	211	U32 depth; // recursion level
		212	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		213	UV stringref_idx;
		214	HV *shareable; // ptr => index, or 0
		215	UV shareable_idx;
115	} enc_t;	216	} enc_t;
116		217
117	INLINE void	218	ecb_inline void
118	need (enc_t *enc, STRLEN len)	219	need (enc_t *enc, STRLEN len)
119	{	220	{
120	if (expect_false (enc->cur + len >= enc->end))	221	if (ecb_expect_false (enc->cur + len >= enc->end))
121	{	222	{
122	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	223	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
123	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	224	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
124	enc->cur = SvPVX (enc->sv) + cur;	225	enc->cur = SvPVX (enc->sv) + cur;
125	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	226	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
126	}	227	}
127	}	228	}
128		229
129	INLINE void	230	ecb_inline void
130	encode_ch (enc_t *enc, char ch)	231	encode_ch (enc_t *enc, char ch)
131	{	232	{
132	need (enc, 1);	233	need (enc, 1);
133	*enc->cur++ = ch;	234	*enc->cur++ = ch;
134	}	235	}
…		…
136	static void	237	static void
137	encode_uint (enc_t *enc, int major, UV len)	238	encode_uint (enc_t *enc, int major, UV len)
138	{	239	{
139	need (enc, 9);	240	need (enc, 9);
140		241
141	if (len < 24)	242	if (ecb_expect_true (len < LENGTH_EXT1))
142	*enc->cur++ = major | len;	243	*enc->cur++ = major | len;
143	else if (len < 0x100)	244	else if (ecb_expect_true (len <= 0xffU))
144	{	245	{
145	*enc->cur++ = major | 24;	246	*enc->cur++ = major | LENGTH_EXT1;
146	*enc->cur++ = len;	247	*enc->cur++ = len;
147	}	248	}
148	else if (len < 0x10000)	249	else if (len <= 0xffffU)
149	{	250	{
150	*enc->cur++ = major | 25;	251	*enc->cur++ = major | LENGTH_EXT2;
151	*enc->cur++ = len >> 8;	252	*enc->cur++ = len >> 8;
152	*enc->cur++ = len;	253	*enc->cur++ = len;
153	}	254	}
154	else if (len < 0x100000000)	255	else if (len <= 0xffffffffU)
155	{	256	{
156	*enc->cur++ = major | 26;	257	*enc->cur++ = major | LENGTH_EXT4;
157	*enc->cur++ = len >> 24;	258	*enc->cur++ = len >> 24;
158	*enc->cur++ = len >> 16;	259	*enc->cur++ = len >> 16;
159	*enc->cur++ = len >> 8;	260	*enc->cur++ = len >> 8;
160	*enc->cur++ = len;	261	*enc->cur++ = len;
161	}	262	}
162	else if (len)	263	else
163	{	264	{
164	*enc->cur++ = major | 27;	265	*enc->cur++ = major | LENGTH_EXT8;
165	*enc->cur++ = len >> 56;	266	*enc->cur++ = len >> 56;
166	*enc->cur++ = len >> 48;	267	*enc->cur++ = len >> 48;
167	*enc->cur++ = len >> 40;	268	*enc->cur++ = len >> 40;
168	*enc->cur++ = len >> 32;	269	*enc->cur++ = len >> 32;
169	*enc->cur++ = len >> 24;	270	*enc->cur++ = len >> 24;
…		…
171	*enc->cur++ = len >> 8;	272	*enc->cur++ = len >> 8;
172	*enc->cur++ = len;	273	*enc->cur++ = len;
173	}	274	}
174	}	275	}
175		276
176	static void	277	ecb_inline void
		278	encode_tag (enc_t *enc, UV tag)
		279	{
		280	encode_uint (enc, MAJOR_TAG, tag);
		281	}
		282
		283	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		284	ecb_noinline static void
177	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	285	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
178	{	286	{
179	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	287	STRLEN ulen = len;
		288	U8 *p, *pend = (U8 *)str + len;
		289
		290	for (p = (U8 *)str; p < pend; ++p)
		291	ulen += *p >> 7; // count set high bits
		292
		293	encode_uint (enc, MAJOR_TEXT, ulen);
		294
		295	need (enc, ulen);
		296	for (p = (U8 *)str; p < pend; ++p)
		297	if (*p < 0x80)
		298	*enc->cur++ = *p;
		299	else
		300	{
		301	*enc->cur++ = 0xc0 + (*p >> 6);
		302	*enc->cur++ = 0x80 + (*p & 63);
		303	}
		304	}
		305
		306	ecb_inline void
		307	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		308	{
		309	if (ecb_expect_false (upgrade_utf8))
		310	if (!utf8)
		311	{
		312	encode_str_utf8 (enc, utf8, str, len);
		313	return;
		314	}
		315
		316	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
180	need (enc, len);	317	need (enc, len);
181	memcpy (enc->cur, str, len);	318	memcpy (enc->cur, str, len);
182	enc->cur += len;	319	enc->cur += len;
183	}	320	}
184		321
		322	ecb_inline void
		323	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		324	{
		325	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		326	{
		327	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		328
		329	if (SvOK (*svp))
		330	{
		331	// already registered, use stringref
		332	encode_tag (enc, CBOR_TAG_STRINGREF);
		333	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		334	return;
		335	}
		336	else if (len >= minimum_string_length (enc->stringref_idx))
		337	{
		338	// register only
		339	sv_setuv (*svp, enc->stringref_idx);
		340	++enc->stringref_idx;
		341	}
		342	}
		343
		344	encode_str (enc, upgrade_utf8, utf8, str, len);
		345	}
		346
185	static void encode_sv (enc_t *enc, SV *sv);	347	static void encode_sv (enc_t *enc, SV *sv);
186		348
187	static void	349	static void
188	encode_av (enc_t *enc, AV *av)	350	encode_av (enc_t *enc, AV *av)
189	{	351	{
…		…
192	if (enc->depth >= enc->cbor.max_depth)	354	if (enc->depth >= enc->cbor.max_depth)
193	croak (ERR_NESTING_EXCEEDED);	355	croak (ERR_NESTING_EXCEEDED);
194		356
195	++enc->depth;	357	++enc->depth;
196		358
197	encode_uint (enc, 0x80, len + 1);	359	encode_uint (enc, MAJOR_ARRAY, len + 1);
198		360
		361	if (SvMAGICAL (av))
199	for (i = 0; i <= len; ++i)	362	for (i = 0; i <= len; ++i)
200	{	363	{
201	SV **svp = av_fetch (av, i, 0);	364	SV **svp = av_fetch (av, i, 0);
202	encode_sv (enc, svp ? *svp : &PL_sv_undef);	365	encode_sv (enc, svp ? *svp : &PL_sv_undef);
203	}	366	}
		367	else
		368	for (i = 0; i <= len; ++i)
		369	{
		370	SV *sv = AvARRAY (av)[i];
		371	encode_sv (enc, sv ? sv : &PL_sv_undef);
		372	}
204		373
205	--enc->depth;	374	--enc->depth;
206	}	375	}
207		376
208	static void	377	static void
…		…
217		386
218	int pairs = hv_iterinit (hv);	387	int pairs = hv_iterinit (hv);
219	int mg = SvMAGICAL (hv);	388	int mg = SvMAGICAL (hv);
220		389
221	if (mg)	390	if (mg)
222	encode_ch (enc, 0xa0 | 31);	391	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
223	else	392	else
224	encode_uint (enc, 0xa0, pairs);	393	encode_uint (enc, MAJOR_MAP, pairs);
225		394
226	while ((he = hv_iternext (hv)))	395	while ((he = hv_iternext (hv)))
227	{	396	{
228	if (HeKLEN (he) == HEf_SVKEY)	397	if (HeKLEN (he) == HEf_SVKEY)
229	encode_sv (enc, HeSVKEY (he));	398	encode_sv (enc, HeSVKEY (he));
230	else	399	else
231	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	400	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
232		401
233	encode_sv (enc, expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	402	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
234	}	403	}
235		404
236	if (mg)	405	if (mg)
237	encode_ch (enc, 0xe0 | 31);	406	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
238		407
239	--enc->depth;	408	--enc->depth;
240	}	409	}
241		410
242	// encode objects, arrays and special \0=false and \1=true values.	411	// encode objects, arrays and special \0=false and \1=true values.
243	static void	412	static void
244	encode_rv (enc_t *enc, SV *sv)	413	encode_rv (enc_t *enc, SV *sv)
245	{	414	{
246	svtype svt;
247
248	SvGETMAGIC (sv);	415	SvGETMAGIC (sv);
		416
249	svt = SvTYPE (sv);	417	svtype svt = SvTYPE (sv);
250		418
251	if (expect_false (SvOBJECT (sv)))	419	if (ecb_expect_false (SvOBJECT (sv)))
252	{	420	{
253	HV *stash = !CBOR_SLOW || cbor_boolean_stash	421	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
254	? cbor_boolean_stash	422	? types_boolean_stash
		423	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		424	HV *error_stash = !CBOR_SLOW || types_error_stash
		425	? types_error_stash
		426	: gv_stashpv ("Types::Serialiser::Error", 1);
		427	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		428	? cbor_tagged_stash
255	: gv_stashpv ("CBOR::XS::Boolean", 1);	429	: gv_stashpv ("CBOR::XS::Tagged" , 1);
256		430
257	if (SvSTASH (sv) == stash)	431	HV *stash = SvSTASH (sv);
258	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	432
		433	if (stash == boolean_stash)
		434	{
		435	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		436	return;
		437	}
		438	else if (stash == error_stash)
		439	{
		440	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		441	return;
		442	}
		443	else if (stash == tagged_stash)
		444	{
		445	if (svt != SVt_PVAV)
		446	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		447
		448	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
		449	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		450
		451	return;
		452	}
		453	}
		454
		455	if (ecb_expect_false (SvREFCNT (sv) > 1)
		456	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		457	{
		458	if (!enc->shareable)
		459	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		460
		461	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		462
		463	if (SvOK (*svp))
		464	{
		465	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		466	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		467	return;
		468	}
259	else	469	else
260	{	470	{
261	#if 0 //TODO	471	sv_setuv (*svp, enc->shareable_idx);
262	if (enc->cbor.flags & F_CONV_BLESSED)	472	++enc->shareable_idx;
		473	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		474	}
		475	}
		476
		477	if (ecb_expect_false (SvOBJECT (sv)))
		478	{
		479	HV *stash = SvSTASH (sv);
		480	GV *method;
		481
		482	if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
263	{	483	{
		484	dSP;
		485
		486	ENTER; SAVETMPS;
		487	PUSHMARK (SP);
264	// we re-bless the reference to get overload and other niceties right	488	// we re-bless the reference to get overload and other niceties right
265	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
266
267	if (to_cbor)
268	{
269	dSP;
270
271	ENTER; SAVETMPS; PUSHMARK (SP);
272	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	489	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
273		490
274	// calling with G_SCALAR ensures that we always get a 1 return value
275	PUTBACK;	491	PUTBACK;
		492	// G_SCALAR ensures that return value is 1
276	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	493	call_sv ((SV *)GvCV (method), G_SCALAR);
277	SPAGAIN;	494	SPAGAIN;
278		495
279	// catch this surprisingly common error	496	// catch this surprisingly common error
280	if (SvROK (TOPs) && SvRV (TOPs) == sv)	497	if (SvROK (TOPs) && SvRV (TOPs) == sv)
281	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	498	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
282		499
283	sv = POPs;
284	PUTBACK;
285
286	encode_sv (enc, sv);	500	encode_sv (enc, POPs);
287		501
		502	PUTBACK;
		503
288	FREETMPS; LEAVE;	504	FREETMPS; LEAVE;
289	}
290	else if (enc->cbor.flags & F_ALLOW_BLESSED)
291	encode_str (enc, "null", 4, 0);
292	else
293	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it",
294	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
295	}	505	}
296	else if (enc->cbor.flags & F_ALLOW_BLESSED)	506	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
297	encode_str (enc, "null", 4, 0);	507	{
		508	dSP;
		509
		510	ENTER; SAVETMPS;
		511	SAVESTACK_POS ();
		512	PUSHMARK (SP);
		513	EXTEND (SP, 2);
		514	// we re-bless the reference to get overload and other niceties right
		515	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		516	PUSHs (sv_cbor);
		517
		518	PUTBACK;
		519	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		520	SPAGAIN;
		521
		522	// catch this surprisingly common error
		523	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		524	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		525
		526	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		527	encode_uint (enc, MAJOR_ARRAY, count + 1);
		528	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		529
		530	while (count)
		531	encode_sv (enc, SP[1 - count--]);
		532
		533	PUTBACK;
		534
		535	FREETMPS; LEAVE;
		536	}
298	else	537	else
299	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	538	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
300	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	539	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
301	#endif
302	}
303	}	540	}
304	else if (svt == SVt_PVHV)	541	else if (svt == SVt_PVHV)
305	encode_hv (enc, (HV *)sv);	542	encode_hv (enc, (HV *)sv);
306	else if (svt == SVt_PVAV)	543	else if (svt == SVt_PVAV)
307	encode_av (enc, (AV *)sv);	544	encode_av (enc, (AV *)sv);
308	else if (svt < SVt_PVAV)
309	{
310	STRLEN len = 0;
311	char *pv = svt ? SvPV (sv, len) : 0;
312
313	if (len == 1 && *pv == '1')
314	encode_ch (enc, 0xe0 | 21);
315	else if (len == 1 && *pv == '0')
316	encode_ch (enc, 0xe0 | 20);
317	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
318	encode_ch (enc, 0xe0 | 23);
319	else
320	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
321	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
322	}
323	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
324	encode_ch (enc, 0xe0 | 23);
325	else	545	else
326	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	546	{
327	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	547	encode_tag (enc, CBOR_TAG_INDIRECTION);
		548	encode_sv (enc, sv);
		549	}
328	}	550	}
329		551
330	static void	552	static void
331	encode_nv (enc_t *enc, SV *sv)	553	encode_nv (enc_t *enc, SV *sv)
332	{	554	{
333	double nv = SvNVX (sv);	555	double nv = SvNVX (sv);
334		556
335	need (enc, 9);	557	need (enc, 9);
336		558
337	if (expect_false (nv == (U32)nv))	559	if (ecb_expect_false (nv == (NV)(U32)nv))
338	encode_uint (enc, 0x00, (U32)nv);	560	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
339	//TODO: maybe I32?	561	//TODO: maybe I32?
340	else if (expect_false (nv == (float)nv))	562	else if (ecb_expect_false (nv == (float)nv))
341	{	563	{
342	uint32_t fp = ecb_float_to_binary32 (nv);	564	uint32_t fp = ecb_float_to_binary32 (nv);
343		565
344	*enc->cur++ = 0xe0 | 26;	566	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
345		567
346	if (!ecb_big_endian ())	568	if (!ecb_big_endian ())
347	fp = ecb_bswap32 (fp);	569	fp = ecb_bswap32 (fp);
348		570
349	memcpy (enc->cur, &fp, 4);	571	memcpy (enc->cur, &fp, 4);
…		…
351	}	573	}
352	else	574	else
353	{	575	{
354	uint64_t fp = ecb_double_to_binary64 (nv);	576	uint64_t fp = ecb_double_to_binary64 (nv);
355		577
356	*enc->cur++ = 0xe0 | 27;	578	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
357		579
358	if (!ecb_big_endian ())	580	if (!ecb_big_endian ())
359	fp = ecb_bswap64 (fp);	581	fp = ecb_bswap64 (fp);
360		582
361	memcpy (enc->cur, &fp, 8);	583	memcpy (enc->cur, &fp, 8);
…		…
370		592
371	if (SvPOKp (sv))	593	if (SvPOKp (sv))
372	{	594	{
373	STRLEN len;	595	STRLEN len;
374	char *str = SvPV (sv, len);	596	char *str = SvPV (sv, len);
375	encode_str (enc, SvUTF8 (sv), str, len);	597	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
376	}	598	}
377	else if (SvNOKp (sv))	599	else if (SvNOKp (sv))
378	encode_nv (enc, sv);	600	encode_nv (enc, sv);
379	else if (SvIOKp (sv))	601	else if (SvIOKp (sv))
380	{	602	{
381	if (SvIsUV (sv))	603	if (SvIsUV (sv))
382	encode_uint (enc, 0x00, SvUVX (sv));	604	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
383	else if (SvIVX (sv) >= 0)	605	else if (SvIVX (sv) >= 0)
384	encode_uint (enc, 0x00, SvIVX (sv));	606	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
385	else	607	else
386	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	608	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
387	}	609	}
388	else if (SvROK (sv))	610	else if (SvROK (sv))
389	encode_rv (enc, SvRV (sv));	611	encode_rv (enc, SvRV (sv));
390	else if (!SvOK (sv))	612	else if (!SvOK (sv))
391	encode_ch (enc, 0xe0 | 22);	613	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
392	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	614	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
393	encode_ch (enc, 0xe0 | 23);	615	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
394	else	616	else
395	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	617	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
396	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	618	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
397	}	619	}
398		620
399	static SV *	621	static SV *
400	encode_cbor (SV *scalar, CBOR *cbor)	622	encode_cbor (SV *scalar, CBOR *cbor)
401	{	623	{
402	enc_t enc;	624	enc_t enc = { 0 };
403		625
404	enc.cbor = *cbor;	626	enc.cbor = *cbor;
405	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	627	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
406	enc.cur = SvPVX (enc.sv);	628	enc.cur = SvPVX (enc.sv);
407	enc.end = SvEND (enc.sv);	629	enc.end = SvEND (enc.sv);
408	enc.depth = 0;
409		630
410	SvPOK_only (enc.sv);	631	SvPOK_only (enc.sv);
		632
		633	if (cbor->flags & F_PACK_STRINGS)
		634	{
		635	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		636	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		637	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		638	}
		639
411	encode_sv (&enc, scalar);	640	encode_sv (&enc, scalar);
412		641
413	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	642	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
414	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	643	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
415		644
…		…
429	U8 *end; // end of input string	658	U8 *end; // end of input string
430	const char *err; // parse error, if != 0	659	const char *err; // parse error, if != 0
431	CBOR cbor;	660	CBOR cbor;
432	U32 depth; // recursion depth	661	U32 depth; // recursion depth
433	U32 maxdepth; // recursion depth limit	662	U32 maxdepth; // recursion depth limit
		663	AV *shareable;
		664	AV *stringref;
		665	SV *decode_tagged;
		666	SV *err_sv; // optional sv for error, needs to be freed
434	} dec_t;	667	} dec_t;
435		668
436	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	669	// set dec->err to ERRSV
		670	ecb_cold static void
		671	err_errsv (dec_t *dec)
		672	{
		673	if (!dec->err)
		674	{
		675	dec->err_sv = newSVsv (ERRSV);
437		676
438	#define WANT(len) if (expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data");	677	// chop off the trailing \n
		678	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		679	*SvEND (dec->err_sv) = 0;
439		680
		681	dec->err = SvPVutf8_nolen (dec->err_sv);
		682	}
		683	}
		684
		685	// the following functions are used to reduce code size and help the compiler to optimise
		686	ecb_cold static void
		687	err_set (dec_t *dec, const char *reason)
		688	{
		689	if (!dec->err)
		690	dec->err = reason;
		691	}
		692
		693	ecb_cold static void
		694	err_unexpected_end (dec_t *dec)
		695	{
		696	err_set (dec, "unexpected end of CBOR data");
		697	}
		698
		699	ecb_cold static void
		700	err_nesting_exceeded (dec_t *dec)
		701	{
		702	err_set (dec, ERR_NESTING_EXCEEDED);
		703	}
		704
		705	#define ERR_DO(do) SB do; goto fail; SE
		706	#define ERR(reason) ERR_DO (err_set (dec, reason))
		707	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		708
		709	#define WANT(len) if (ecb_expect_false ((UV)(dec->end - dec->cur) < (UV)len)) ERR_DO (err_unexpected_end (dec))
		710
440	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	711	#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED)
441	#define DEC_DEC_DEPTH --dec->depth	712	#define DEC_DEC_DEPTH --dec->depth
442		713
443	static UV	714	static UV
444	decode_uint (dec_t *dec)	715	decode_uint (dec_t *dec)
445	{	716	{
446	switch (*dec->cur & 31)	717	U8 m = *dec->cur & MINOR_MASK;
447	{	718	++dec->cur;
448	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
449	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
450	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
451	return *dec->cur++ & 31;
452		719
453	case 24:	720	if (ecb_expect_true (m < LENGTH_EXT1))
		721	return m;
		722	else if (ecb_expect_true (m == LENGTH_EXT1))
		723	{
454	WANT (2);	724	WANT (1);
455	dec->cur += 2;	725	dec->cur += 1;
456	return dec->cur[-1];	726	return dec->cur[-1];
457		727	}
458	case 25:	728	else if (ecb_expect_true (m == LENGTH_EXT2))
		729	{
459	WANT (3);	730	WANT (2);
460	dec->cur += 3;	731	dec->cur += 2;
461	return (((UV)dec->cur[-2]) << 8)	732	return (((UV)dec->cur[-2]) << 8)
462	| ((UV)dec->cur[-1]);	733	| ((UV)dec->cur[-1]);
463		734	}
464	case 26:	735	else if (ecb_expect_true (m == LENGTH_EXT4))
		736	{
465	WANT (5);	737	WANT (4);
466	dec->cur += 5;	738	dec->cur += 4;
467	return (((UV)dec->cur[-4]) << 24)	739	return (((UV)dec->cur[-4]) << 24)
468	| (((UV)dec->cur[-3]) << 16)	740	| (((UV)dec->cur[-3]) << 16)
469	| (((UV)dec->cur[-2]) << 8)	741	| (((UV)dec->cur[-2]) << 8)
470	| ((UV)dec->cur[-1]);	742	| ((UV)dec->cur[-1]);
471		743	}
472	case 27:	744	else if (ecb_expect_true (m == LENGTH_EXT8))
		745	{
473	WANT (9);	746	WANT (8);
474	dec->cur += 9;	747	dec->cur += 8;
		748
		749	return
		750	#if UVSIZE < 8
		751	0
		752	#else
475	return (((UV)dec->cur[-8]) << 56)	753	(((UV)dec->cur[-8]) << 56)
476	| (((UV)dec->cur[-7]) << 48)	754	| (((UV)dec->cur[-7]) << 48)
477	| (((UV)dec->cur[-6]) << 40)	755	| (((UV)dec->cur[-6]) << 40)
478	| (((UV)dec->cur[-5]) << 32)	756	| (((UV)dec->cur[-5]) << 32)
		757	#endif
479	| (((UV)dec->cur[-4]) << 24)	758	| (((UV)dec->cur[-4]) << 24)
480	| (((UV)dec->cur[-3]) << 16)	759	| (((UV)dec->cur[-3]) << 16)
481	| (((UV)dec->cur[-2]) << 8)	760	| (((UV)dec->cur[-2]) << 8)
482	| ((UV)dec->cur[-1]);	761	| ((UV)dec->cur[-1]);
483		762	}
484	default:	763	else
485	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	764	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
486	}
487		765
488	fail:	766	fail:
489	return 0;	767	return 0;
490	}	768	}
491		769
…		…
496	{	774	{
497	AV *av = newAV ();	775	AV *av = newAV ();
498		776
499	DEC_INC_DEPTH;	777	DEC_INC_DEPTH;
500		778
501	if ((*dec->cur & 31) == 31)	779	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
502	{	780	{
503	++dec->cur;	781	++dec->cur;
504		782
505	for (;;)	783	for (;;)
506	{	784	{
507	WANT (1);	785	WANT (1);
508		786
509	if (*dec->cur == (0xe0 | 31))	787	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
510	{	788	{
511	++dec->cur;	789	++dec->cur;
512	break;	790	break;
513	}	791	}
514		792
515	av_push (av, decode_sv (dec));	793	av_push (av, decode_sv (dec));
516	}	794	}
517	}	795	}
518	else	796	else
519	{	797	{
520	int i, len = decode_uint (dec);	798	UV i, len = decode_uint (dec);
521		799
		800	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
522	av_fill (av, len - 1);	801	av_fill (av, len - 1);
523		802
524	for (i = 0; i < len; ++i)	803	for (i = 0; i < len; ++i)
525	AvARRAY (av)[i] = decode_sv (dec);	804	AvARRAY (av)[i] = decode_sv (dec);
526	}	805	}
…		…
532	SvREFCNT_dec (av);	811	SvREFCNT_dec (av);
533	DEC_DEC_DEPTH;	812	DEC_DEC_DEPTH;
534	return &PL_sv_undef;	813	return &PL_sv_undef;
535	}	814	}
536		815
		816	static void
		817	decode_he (dec_t *dec, HV *hv)
		818	{
		819	// for speed reasons, we specialcase single-string
		820	// byte or utf-8 strings as keys, but only when !stringref
		821
		822	if (ecb_expect_true (!dec->stringref))
		823	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		824	{
		825	STRLEN len = decode_uint (dec);
		826	char *key = (char *)dec->cur;
		827
		828	WANT (len);
		829	dec->cur += len;
		830
		831	hv_store (hv, key, len, decode_sv (dec), 0);
		832
		833	return;
		834	}
		835	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		836	{
		837	STRLEN len = decode_uint (dec);
		838	char *key = (char *)dec->cur;
		839
		840	WANT (len);
		841	dec->cur += len;
		842
		843	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		844	if (!is_utf8_string (key, len))
		845	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		846
		847	hv_store (hv, key, -len, decode_sv (dec), 0);
		848
		849	return;
		850	}
		851
		852	SV *k = decode_sv (dec);
		853	SV *v = decode_sv (dec);
		854
		855	// we leak memory if uncaught exceptions are thrown by random magical
		856	// methods, and this is hopefully the only place where it can happen,
		857	// so if there is a chance of an exception, take the very slow path.
		858	// since catching exceptions is "undocumented/internal/forbidden" by
		859	// the new p5p powers, we need to call out to a perl function :/
		860	if (ecb_expect_false (SvAMAGIC (k)))
		861	{
		862	dSP;
		863
		864	ENTER; SAVETMPS;
		865	PUSHMARK (SP);
		866	EXTEND (SP, 3);
		867	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		868	PUSHs (sv_2mortal (k));
		869	PUSHs (sv_2mortal (v));
		870
		871	PUTBACK;
		872	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		873	SPAGAIN;
		874
		875	FREETMPS; LEAVE;
		876
		877	if (SvTRUE (ERRSV))
		878	ERR_ERRSV;
		879
		880	return;
		881	}
		882
		883	hv_store_ent (hv, k, v, 0);
		884	SvREFCNT_dec (k);
		885
		886	fail:
		887	;
		888	}
		889
537	static SV *	890	static SV *
538	decode_hv (dec_t *dec)	891	decode_hv (dec_t *dec)
539	{	892	{
540	HV *hv = newHV ();	893	HV *hv = newHV ();
541		894
542	DEC_INC_DEPTH;	895	DEC_INC_DEPTH;
543		896
544	if ((*dec->cur & 31) == 31)	897	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
545	{	898	{
546	++dec->cur;	899	++dec->cur;
547		900
548	for (;;)	901	for (;;)
549	{	902	{
550	WANT (1);	903	WANT (1);
551		904
552	if (*dec->cur == (0xe0 | 31))	905	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
553	{	906	{
554	++dec->cur;	907	++dec->cur;
555	break;	908	break;
556	}	909	}
557		910
558	SV *k = decode_sv (dec);	911	decode_he (dec, hv);
559	SV *v = decode_sv (dec);
560
561	hv_store_ent (hv, k, v, 0);
562	}	912	}
563	}	913	}
564	else	914	else
565	{	915	{
566	int len = decode_uint (dec);	916	UV pairs = decode_uint (dec);
567		917
		918	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		919
568	while (len--)	920	while (pairs--)
569	{	921	decode_he (dec, hv);
570	SV *k = decode_sv (dec);
571	SV *v = decode_sv (dec);
572
573	hv_store_ent (hv, k, v, 0);
574	}
575	}	922	}
576		923
577	DEC_DEC_DEPTH;	924	DEC_DEC_DEPTH;
578	return newRV_noinc ((SV *)hv);	925	return newRV_noinc ((SV *)hv);
579
580	#if 0
581	SV *sv;
582	HV *hv = newHV ();
583
584	DEC_INC_DEPTH;
585	decode_ws (dec);
586
587	for (;;)
588	{
589	// heuristic: assume that
590	// a) decode_str + hv_store_ent are abysmally slow.
591	// b) most hash keys are short, simple ascii text.
592	// => try to "fast-match" such strings to avoid
593	// the overhead of decode_str + hv_store_ent.
594	{
595	SV *value;
596	char *p = dec->cur;
597	char *e = p + 24; // only try up to 24 bytes
598
599	for (;;)
600	{
601	// the >= 0x80 is false on most architectures
602	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
603	{
604	// slow path, back up and use decode_str
605	SV *key = decode_str (dec);
606	if (!key)
607	goto fail;
608
609	decode_ws (dec); EXPECT_CH (':');
610
611	decode_ws (dec);
612	value = decode_sv (dec);
613	if (!value)
614	{
615	SvREFCNT_dec (key);
616	goto fail;
617	}
618
619	hv_store_ent (hv, key, value, 0);
620	SvREFCNT_dec (key);
621
622	break;
623	}
624	else if (*p == '"')
625	{
626	// fast path, got a simple key
627	char *key = dec->cur;
628	int len = p - key;
629	dec->cur = p + 1;
630
631	decode_ws (dec); EXPECT_CH (':');
632
633	decode_ws (dec);
634	value = decode_sv (dec);
635	if (!value)
636	goto fail;
637
638	hv_store (hv, key, len, value, 0);
639
640	break;
641	}
642
643	++p;
644	}
645	}
646
647	decode_ws (dec);
648
649	if (*dec->cur == '}')
650	{
651	++dec->cur;
652	break;
653	}
654
655	if (*dec->cur != ',')
656	ERR (", or } expected while parsing object/hash");
657
658	++dec->cur;
659
660	decode_ws (dec);
661
662	if (*dec->cur == '}' && dec->cbor.flags & F_RELAXED)
663	{
664	++dec->cur;
665	break;
666	}
667	}
668
669	DEC_DEC_DEPTH;
670	sv = newRV_noinc ((SV *)hv);
671
672	// check filter callbacks
673	if (dec->cbor.flags & F_HOOK)
674	{
675	if (dec->cbor.cb_sk_object && HvKEYS (hv) == 1)
676	{
677	HE *cb, *he;
678
679	hv_iterinit (hv);
680	he = hv_iternext (hv);
681	hv_iterinit (hv);
682
683	// the next line creates a mortal sv each time its called.
684	// might want to optimise this for common cases.
685	cb = hv_fetch_ent (dec->cbor.cb_sk_object, hv_iterkeysv (he), 0, 0);
686
687	if (cb)
688	{
689	dSP;
690	int count;
691
692	ENTER; SAVETMPS; PUSHMARK (SP);
693	XPUSHs (HeVAL (he));
694	sv_2mortal (sv);
695
696	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
697
698	if (count == 1)
699	{
700	sv = newSVsv (POPs);
701	FREETMPS; LEAVE;
702	return sv;
703	}
704
705	SvREFCNT_inc (sv);
706	FREETMPS; LEAVE;
707	}
708	}
709
710	if (dec->cbor.cb_object)
711	{
712	dSP;
713	int count;
714
715	ENTER; SAVETMPS; PUSHMARK (SP);
716	XPUSHs (sv_2mortal (sv));
717
718	PUTBACK; count = call_sv (dec->cbor.cb_object, G_ARRAY); SPAGAIN;
719
720	if (count == 1)
721	{
722	sv = newSVsv (POPs);
723	FREETMPS; LEAVE;
724	return sv;
725	}
726
727	SvREFCNT_inc (sv);
728	FREETMPS; LEAVE;
729	}
730	}
731
732	return sv;
733	#endif
734		926
735	fail:	927	fail:
736	SvREFCNT_dec (hv);	928	SvREFCNT_dec (hv);
737	DEC_DEC_DEPTH;	929	DEC_DEC_DEPTH;
738	return &PL_sv_undef;	930	return &PL_sv_undef;
739	}	931	}
740		932
741	static SV *	933	static SV *
742	decode_str (dec_t *dec, int utf8)	934	decode_str (dec_t *dec, int utf8)
743	{	935	{
744	SV *sv;	936	SV *sv = 0;
745		937
746	if ((*dec->cur & 31) == 31)	938	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
747	{	939	{
		940	// indefinite length strings
748	++dec->cur;	941	++dec->cur;
749		942
		943	U8 major = *dec->cur & MAJOR_MISC;
		944
750	sv = newSVpvn ("", 0);	945	sv = newSVpvn ("", 0);
751		946
752	// not very fast, and certainly not robust against illegal input
753	for (;;)	947	for (;;)
754	{	948	{
755	WANT (1);	949	WANT (1);
756		950
757	if (*dec->cur == (0xe0 | 31))	951	if ((*dec->cur - major) > LENGTH_EXT8)
		952	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
758	{	953	{
759	++dec->cur;	954	++dec->cur;
760	break;	955	break;
761	}	956	}
		957	else
		958	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
762		959
763	SV *sv2 = decode_sv (dec);	960	STRLEN len = decode_uint (dec);
764	sv_catsv (sv, sv2);	961
		962	WANT (len);
		963	sv_catpvn (sv, dec->cur, len);
		964	dec->cur += len;
765	}	965	}
766	}	966	}
767	else	967	else
768	{	968	{
769	STRLEN len = decode_uint (dec);	969	STRLEN len = decode_uint (dec);
770		970
771	WANT (len);	971	WANT (len);
772	sv = newSVpvn (dec->cur, len);	972	sv = newSVpvn (dec->cur, len);
773	dec->cur += len;	973	dec->cur += len;
		974
		975	if (ecb_expect_false (dec->stringref)
		976	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		977	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
774	}	978	}
775		979
776	if (utf8)	980	if (utf8)
		981	{
		982	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		983	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		984	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		985
777	SvUTF8_on (sv);	986	SvUTF8_on (sv);
		987	}
778		988
779	return sv;	989	return sv;
780		990
781	fail:	991	fail:
		992	SvREFCNT_dec (sv);
		993	return &PL_sv_undef;
		994	}
		995
		996	static SV *
		997	decode_tagged (dec_t *dec)
		998	{
		999	SV *sv = 0;
		1000	UV tag = decode_uint (dec);
		1001
		1002	WANT (1);
		1003
		1004	switch (tag)
		1005	{
		1006	case CBOR_TAG_MAGIC:
		1007	sv = decode_sv (dec);
		1008	break;
		1009
		1010	case CBOR_TAG_INDIRECTION:
		1011	sv = newRV_noinc (decode_sv (dec));
		1012	break;
		1013
		1014	case CBOR_TAG_STRINGREF_NAMESPACE:
		1015	{
		1016	// do nmot use SAVETMPS/FREETMPS, as these will
		1017	// erase mortalised caches, e.g. "shareable"
		1018	ENTER;
		1019
		1020	SAVESPTR (dec->stringref);
		1021	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1022
		1023	sv = decode_sv (dec);
		1024
		1025	LEAVE;
		1026	}
		1027	break;
		1028
		1029	case CBOR_TAG_STRINGREF:
		1030	{
		1031	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1032	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1033
		1034	UV idx = decode_uint (dec);
		1035
		1036	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		1037	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1038
		1039	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1040	}
		1041	break;
		1042
		1043	case CBOR_TAG_VALUE_SHAREABLE:
		1044	{
		1045	if (ecb_expect_false (!dec->shareable))
		1046	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1047
		1048	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1049	{
		1050	sv = newSV (0);
		1051	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1052
		1053	SV *osv = decode_sv (dec);
		1054	sv_setsv (sv, osv);
		1055	SvREFCNT_dec_NN (osv);
		1056	}
		1057	else
		1058	{
		1059	av_push (dec->shareable, &PL_sv_undef);
		1060	int idx = AvFILLp (dec->shareable);
		1061	sv = decode_sv (dec);
		1062	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1063	}
		1064	}
		1065	break;
		1066
		1067	case CBOR_TAG_VALUE_SHAREDREF:
		1068	{
		1069	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1070	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1071
		1072	UV idx = decode_uint (dec);
		1073
		1074	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		1075	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1076
		1077	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1078
		1079	if (sv == &PL_sv_undef)
		1080	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1081	}
		1082	break;
		1083
		1084	case CBOR_TAG_PERL_OBJECT:
		1085	{
		1086	sv = decode_sv (dec);
		1087
		1088	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1089	ERR ("corrupted CBOR data (non-array perl object)");
		1090
		1091	AV *av = (AV *)SvRV (sv);
		1092	int len = av_len (av) + 1;
		1093	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1094
		1095	if (!stash)
		1096	ERR ("cannot decode perl-object (package does not exist)");
		1097
		1098	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1099
		1100	if (!method)
		1101	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1102
		1103	dSP;
		1104
		1105	ENTER; SAVETMPS;
		1106	PUSHMARK (SP);
		1107	EXTEND (SP, len + 1);
		1108	// we re-bless the reference to get overload and other niceties right
		1109	PUSHs (*av_fetch (av, 0, 1));
		1110	PUSHs (sv_cbor);
		1111
		1112	int i;
		1113
		1114	for (i = 1; i < len; ++i)
		1115	PUSHs (*av_fetch (av, i, 1));
		1116
		1117	PUTBACK;
		1118	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1119	SPAGAIN;
		1120
		1121	if (SvTRUE (ERRSV))
		1122	{
		1123	FREETMPS; LEAVE;
		1124	ERR_ERRSV;
		1125	}
		1126
		1127	SvREFCNT_dec (sv);
		1128	sv = SvREFCNT_inc (POPs);
		1129
		1130	PUTBACK;
		1131
		1132	FREETMPS; LEAVE;
		1133	}
		1134	break;
		1135
		1136	default:
		1137	{
		1138	SV *tag_sv = newSVuv (tag);
		1139
		1140	sv = decode_sv (dec);
		1141
		1142	dSP;
		1143	ENTER; SAVETMPS;
		1144	SAVESTACK_POS ();
		1145	PUSHMARK (SP);
		1146	EXTEND (SP, 2);
		1147	PUSHs (tag_sv);
		1148	PUSHs (sv);
		1149
		1150	PUTBACK;
		1151	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1152	SPAGAIN;
		1153
		1154	if (SvTRUE (ERRSV))
		1155	{
		1156	SvREFCNT_dec (tag_sv);
		1157	FREETMPS; LEAVE;
		1158	ERR_ERRSV;
		1159	}
		1160
		1161	if (count)
		1162	{
		1163	SvREFCNT_dec (tag_sv);
		1164	SvREFCNT_dec (sv);
		1165	sv = SvREFCNT_inc (POPs);
		1166	}
		1167	else
		1168	{
		1169	AV *av = newAV ();
		1170	av_push (av, tag_sv);
		1171	av_push (av, sv);
		1172
		1173	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1174	? cbor_tagged_stash
		1175	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1176	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1177	}
		1178
		1179	PUTBACK;
		1180
		1181	FREETMPS; LEAVE;
		1182	}
		1183	break;
		1184	}
		1185
		1186	return sv;
		1187
		1188	fail:
		1189	SvREFCNT_dec (sv);
782	return &PL_sv_undef;	1190	return &PL_sv_undef;
783	}	1191	}
784		1192
785	static SV *	1193	static SV *
786	decode_sv (dec_t *dec)	1194	decode_sv (dec_t *dec)
787	{	1195	{
788	WANT (1);	1196	WANT (1);
789		1197
790	switch (*dec->cur >> 5)	1198	switch (*dec->cur >> MAJOR_SHIFT)
791	{	1199	{
792	case 0: // unsigned int	1200	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
793	//TODO: 64 bit values on 3 2bit perls	1201	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
794	return newSVuv (decode_uint (dec));	1202	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
795	case 1: // negative int	1203	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
796	return newSViv (-1 - (IV)decode_uint (dec));	1204	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
797	case 2: // octet string	1205	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
798	return decode_str (dec, 0);	1206	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
799	case 3: // utf-8 string	1207
800	return decode_str (dec, 1);	1208	case MAJOR_MISC >> MAJOR_SHIFT:
801	case 4: // array
802	return decode_av (dec);
803	case 5: // map
804	return decode_hv (dec);
805	case 6: // tag
806	abort ();
807	break;
808	case 7: // misc
809	switch (*dec->cur++ & 31)	1209	switch (*dec->cur++ & MINOR_MASK)
810	{	1210	{
811	case 20:	1211	case SIMPLE_FALSE:
812	#if CBOR_SLOW	1212	#if CBOR_SLOW
813	cbor_false = get_bool ("CBOR::XS::false");	1213	types_false = get_bool ("Types::Serialiser::false");
814	#endif	1214	#endif
815	return newSVsv (cbor_false);	1215	return newSVsv (types_false);
816	case 21:	1216	case SIMPLE_TRUE:
817	#if CBOR_SLOW	1217	#if CBOR_SLOW
818	cbor_true = get_bool ("CBOR::XS::true");	1218	types_true = get_bool ("Types::Serialiser::true");
819	#endif	1219	#endif
820	return newSVsv (cbor_true);	1220	return newSVsv (types_true);
821	case 22:	1221	case SIMPLE_NULL:
822	return newSVsv (&PL_sv_undef);	1222	return newSVsv (&PL_sv_undef);
		1223	case SIMPLE_UNDEF:
		1224	#if CBOR_SLOW
		1225	types_error = get_bool ("Types::Serialiser::error");
		1226	#endif
		1227	return newSVsv (types_error);
823		1228
824	case 25:	1229	case MISC_FLOAT16:
825	{	1230	{
826	WANT (2);	1231	WANT (2);
827		1232
828	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1233	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
829	dec->cur += 2;	1234	dec->cur += 2;
830		1235
831	return newSVnv (ecb_binary16_to_float (fp));	1236	return newSVnv (ecb_binary16_to_float (fp));
832	}	1237	}
833		1238
834	case 26:	1239	case MISC_FLOAT32:
835	{	1240	{
836	uint32_t fp;	1241	uint32_t fp;
837	WANT (4);	1242	WANT (4);
838	memcpy (&fp, dec->cur, 4);	1243	memcpy (&fp, dec->cur, 4);
839	dec->cur += 4;	1244	dec->cur += 4;
…		…
842	fp = ecb_bswap32 (fp);	1247	fp = ecb_bswap32 (fp);
843		1248
844	return newSVnv (ecb_binary32_to_float (fp));	1249	return newSVnv (ecb_binary32_to_float (fp));
845	}	1250	}
846		1251
847	case 27:	1252	case MISC_FLOAT64:
848	{	1253	{
849	uint64_t fp;	1254	uint64_t fp;
850	WANT (8);	1255	WANT (8);
851	memcpy (&fp, dec->cur, 8);	1256	memcpy (&fp, dec->cur, 8);
852	dec->cur += 8;	1257	dec->cur += 8;
…		…
855	fp = ecb_bswap64 (fp);	1260	fp = ecb_bswap64 (fp);
856		1261
857	return newSVnv (ecb_binary64_to_double (fp));	1262	return newSVnv (ecb_binary64_to_double (fp));
858	}	1263	}
859		1264
860	// 0..19 unassigned	1265	// 0..19 unassigned simple
861	// 24 reserved + unassigned (reserved values are not encodable)	1266	// 24 reserved + unassigned simple (reserved values are not encodable)
		1267	// 28-30 unassigned misc
		1268	// 31 break code
862	default:	1269	default:
863	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1270	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
864	}	1271	}
865		1272
866	break;	1273	break;
867	}	1274	}
868	#if 0
869	switch (*dec->cur)
870	{
871	//case '"': ++dec->cur; return decode_str (dec);
872	case '[': ++dec->cur; return decode_av (dec);
873	case '{': ++dec->cur; return decode_hv (dec);
874
875	case '-':
876	case '0': case '1': case '2': case '3': case '4':
877	case '5': case '6': case '7': case '8': case '9':
878	//TODO return decode_num (dec);
879
880	case 't':
881	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
882	{
883	dec->cur += 4;
884	#if CBOR_SLOW
885	cbor_true = get_bool ("CBOR::XS::true");
886	#endif
887	return newSVsv (cbor_true);
888	}
889	else
890	ERR ("'true' expected");
891
892	break;
893
894	case 'f':
895	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
896	{
897	dec->cur += 5;
898	#if CBOR_SLOW
899	cbor_false = get_bool ("CBOR::XS::false");
900	#endif
901	return newSVsv (cbor_false);
902	}
903	else
904	ERR ("'false' expected");
905
906	break;
907
908	case 'n':
909	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
910	{
911	dec->cur += 4;
912	return newSVsv (&PL_sv_undef);
913	}
914	else
915	ERR ("'null' expected");
916
917	break;
918
919	default:
920	ERR ("malformed CBOR string, neither array, object, number, string or atom");
921	break;
922	}
923	#endif
924		1275
925	fail:	1276	fail:
926	return &PL_sv_undef;	1277	return &PL_sv_undef;
927	}	1278	}
928		1279
929	static SV *	1280	static SV *
930	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1281	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
931	{	1282	{
932	dec_t dec;	1283	dec_t dec = { 0 };
933	SV *sv;	1284	SV *sv;
		1285	STRLEN len;
		1286	char *data = SvPVbyte (string, len);
934		1287
935	/* work around bugs in 5.10 where manipulating magic values
936	* makes perl ignore the magic in subsequent accesses.
937	* also make a copy of non-PV values, to get them into a clean
938	* state (SvPV should do that, but it's buggy, see below).
939	*/
940	/*SvGETMAGIC (string);*/
941	if (SvMAGICAL (string) || !SvPOK (string))
942	string = sv_2mortal (newSVsv (string));
943
944	SvUPGRADE (string, SVt_PV);
945
946	/* work around a bug in perl 5.10, which causes SvCUR to fail an
947	* assertion with -DDEBUGGING, although SvCUR is documented to
948	* return the xpv_cur field which certainly exists after upgrading.
949	* according to nicholas clark, calling SvPOK fixes this.
950	* But it doesn't fix it, so try another workaround, call SvPV_nolen
951	* and hope for the best.
952	* Damnit, SvPV_nolen still trips over yet another assertion. This
953	* assertion business is seriously broken, try yet another workaround
954	* for the broken -DDEBUGGING.
955	*/
956	{
957	#ifdef DEBUGGING
958	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
959	#else
960	STRLEN offset = SvCUR (string);
961	#endif
962
963	if (offset > cbor->max_size && cbor->max_size)	1288	if (len > cbor->max_size && cbor->max_size)
964	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1289	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
965	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1290	(unsigned long)len, (unsigned long)cbor->max_size);
966	}
967
968	sv_utf8_downgrade (string, 0);
969		1291
970	dec.cbor = *cbor;	1292	dec.cbor = *cbor;
971	dec.cur = (U8 *)SvPVX (string);	1293	dec.cur = (U8 *)data;
972	dec.end = (U8 *)SvEND (string);	1294	dec.end = (U8 *)data + len;
973	dec.err = 0;
974	dec.depth = 0;
975
976	if (dec.cbor.cb_object || dec.cbor.cb_sk_object)
977	;//TODO dec.cbor.flags |= F_HOOK;
978		1295
979	sv = decode_sv (&dec);	1296	sv = decode_sv (&dec);
980		1297
981	if (offset_return)	1298	if (offset_return)
982	*offset_return = dec.cur;	1299	*offset_return = dec.cur;
…		…
985	if (dec.cur != dec.end && !dec.err)	1302	if (dec.cur != dec.end && !dec.err)
986	dec.err = "garbage after CBOR object";	1303	dec.err = "garbage after CBOR object";
987		1304
988	if (dec.err)	1305	if (dec.err)
989	{	1306	{
		1307	if (dec.shareable)
		1308	{
		1309	// need to break cyclic links, which would all be in shareable
		1310	int i;
		1311	SV **svp;
		1312
		1313	for (i = av_len (dec.shareable) + 1; i--; )
		1314	if ((svp = av_fetch (dec.shareable, i, 0)))
		1315	sv_setsv (*svp, &PL_sv_undef);
		1316	}
		1317
990	SvREFCNT_dec (sv);	1318	SvREFCNT_dec (sv);
		1319
		1320	if (dec.err_sv)
		1321	sv_2mortal (dec.err_sv);
		1322
991	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1323	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
992	}	1324	}
993		1325
994	sv = sv_2mortal (sv);	1326	sv = sv_2mortal (sv);
995		1327
996	return sv;	1328	return sv;
997	}	1329	}
998		1330
		1331	/////////////////////////////////////////////////////////////////////////////
		1332	// incremental parser
		1333
		1334	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1335
		1336	// returns 0 for notyet, 1 for success or error
		1337	static int
		1338	incr_parse (CBOR *self, SV *cborstr)
		1339	{
		1340	STRLEN cur;
		1341	SvPV (cborstr, cur);
		1342
		1343	while (ecb_expect_true (self->incr_need <= cur))
		1344	{
		1345	// table of integer count bytes
		1346	static I8 incr_len[MINOR_MASK + 1] = {
		1347	0, 0, 0, 0, 0, 0, 0, 0,
		1348	0, 0, 0, 0, 0, 0, 0, 0,
		1349	0, 0, 0, 0, 0, 0, 0, 0,
		1350	1, 2, 4, 8,-1,-1,-1,-2
		1351	};
		1352
		1353	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1354	U8 m = *p & MINOR_MASK;
		1355	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1356	I8 ilen = incr_len[m];
		1357
		1358	self->incr_need = self->incr_pos + 1;
		1359
		1360	if (ecb_expect_false (ilen < 0))
		1361	{
		1362	if (m != MINOR_INDEF)
		1363	return 1; // error
		1364
		1365	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1366	{
		1367	if (count >= 0)
		1368	return 1; // error
		1369
		1370	count = 1;
		1371	}
		1372	else
		1373	{
		1374	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1375	count = -1;
		1376	}
		1377	}
		1378	else
		1379	{
		1380	self->incr_need += ilen;
		1381	if (ecb_expect_false (self->incr_need > cur))
		1382	return 0;
		1383
		1384	int major = *p >> MAJOR_SHIFT;
		1385
		1386	switch (major)
		1387	{
		1388	case MAJOR_TAG >> MAJOR_SHIFT:
		1389	++count; // tags merely prefix another value
		1390	break;
		1391
		1392	case MAJOR_BYTES >> MAJOR_SHIFT:
		1393	case MAJOR_TEXT >> MAJOR_SHIFT:
		1394	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1395	case MAJOR_MAP >> MAJOR_SHIFT:
		1396	{
		1397	UV len;
		1398
		1399	if (ecb_expect_false (ilen))
		1400	{
		1401	len = 0;
		1402
		1403	do {
		1404	len = (len << 8) | *++p;
		1405	} while (--ilen);
		1406	}
		1407	else
		1408	len = m;
		1409
		1410	switch (major)
		1411	{
		1412	case MAJOR_BYTES >> MAJOR_SHIFT:
		1413	case MAJOR_TEXT >> MAJOR_SHIFT:
		1414	self->incr_need += len;
		1415	if (ecb_expect_false (self->incr_need > cur))
		1416	return 0;
		1417
		1418	break;
		1419
		1420	case MAJOR_MAP >> MAJOR_SHIFT:
		1421	len <<= 1;
		1422	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1423	if (len)
		1424	{
		1425	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1426	count = len + 1;
		1427	}
		1428	break;
		1429	}
		1430	}
		1431	}
		1432	}
		1433
		1434	self->incr_pos = self->incr_need;
		1435
		1436	if (count > 0)
		1437	{
		1438	while (!--count)
		1439	{
		1440	if (!AvFILLp (self->incr_count))
		1441	return 1; // done
		1442
		1443	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1444	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1445	}
		1446
		1447	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1448	}
		1449	}
		1450
		1451	return 0;
		1452	}
		1453
		1454
999	/////////////////////////////////////////////////////////////////////////////	1455	/////////////////////////////////////////////////////////////////////////////
1000	// XS interface functions	1456	// XS interface functions
1001		1457
1002	MODULE = CBOR::XS PACKAGE = CBOR::XS	1458	MODULE = CBOR::XS PACKAGE = CBOR::XS
1003		1459
1004	BOOT:	1460	BOOT:
1005	{	1461	{
1006	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1462	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1007	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1463	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1008		1464
1009	cbor_true = get_bool ("CBOR::XS::true");	1465	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1010	cbor_false = get_bool ("CBOR::XS::false");	1466	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1467
		1468	types_true = get_bool ("Types::Serialiser::true" );
		1469	types_false = get_bool ("Types::Serialiser::false");
		1470	types_error = get_bool ("Types::Serialiser::error");
		1471
		1472	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1473
		1474	sv_cbor = newSVpv ("CBOR", 0);
		1475	SvREADONLY_on (sv_cbor);
		1476
		1477	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
1011	}	1478	}
1012		1479
1013	PROTOTYPES: DISABLE	1480	PROTOTYPES: DISABLE
1014		1481
1015	void CLONE (...)	1482	void CLONE (...)
1016	CODE:	1483	CODE:
1017	cbor_stash = 0;	1484	cbor_stash = 0;
		1485	cbor_tagged_stash = 0;
		1486	types_error_stash = 0;
1018	cbor_boolean_stash = 0;	1487	types_boolean_stash = 0;
1019		1488
1020	void new (char *klass)	1489	void new (char *klass)
1021	PPCODE:	1490	PPCODE:
1022	{	1491	{
1023	SV *pv = NEWSV (0, sizeof (CBOR));	1492	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1031		1500
1032	void shrink (CBOR *self, int enable = 1)	1501	void shrink (CBOR *self, int enable = 1)
1033	ALIAS:	1502	ALIAS:
1034	shrink = F_SHRINK	1503	shrink = F_SHRINK
1035	allow_unknown = F_ALLOW_UNKNOWN	1504	allow_unknown = F_ALLOW_UNKNOWN
		1505	allow_sharing = F_ALLOW_SHARING
		1506	allow_cycles = F_ALLOW_CYCLES
		1507	pack_strings = F_PACK_STRINGS
		1508	text_keys = F_TEXT_KEYS
		1509	text_strings = F_TEXT_STRINGS
		1510	validate_utf8 = F_VALIDATE_UTF8
1036	PPCODE:	1511	PPCODE:
1037	{	1512	{
1038	if (enable)	1513	if (enable)
1039	self->flags |= ix;	1514	self->flags |= ix;
1040	else	1515	else
…		…
1045		1520
1046	void get_shrink (CBOR *self)	1521	void get_shrink (CBOR *self)
1047	ALIAS:	1522	ALIAS:
1048	get_shrink = F_SHRINK	1523	get_shrink = F_SHRINK
1049	get_allow_unknown = F_ALLOW_UNKNOWN	1524	get_allow_unknown = F_ALLOW_UNKNOWN
		1525	get_allow_sharing = F_ALLOW_SHARING
		1526	get_allow_cycles = F_ALLOW_CYCLES
		1527	get_pack_strings = F_PACK_STRINGS
		1528	get_text_keys = F_TEXT_KEYS
		1529	get_text_strings = F_TEXT_STRINGS
		1530	get_validate_utf8 = F_VALIDATE_UTF8
1050	PPCODE:	1531	PPCODE:
1051	XPUSHs (boolSV (self->flags & ix));	1532	XPUSHs (boolSV (self->flags & ix));
1052		1533
1053	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1534	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1054	PPCODE:	1535	PPCODE:
…		…
1070	CODE:	1551	CODE:
1071	RETVAL = self->max_size;	1552	RETVAL = self->max_size;
1072	OUTPUT:	1553	OUTPUT:
1073	RETVAL	1554	RETVAL
1074		1555
1075	#if 0 //TODO	1556	void filter (CBOR *self, SV *filter = 0)
1076
1077	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1078	PPCODE:	1557	PPCODE:
1079	{
1080	SvREFCNT_dec (self->cb_object);	1558	SvREFCNT_dec (self->filter);
1081	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1559	self->filter = filter ? newSVsv (filter) : filter;
1082
1083	XPUSHs (ST (0));	1560	XPUSHs (ST (0));
1084	}
1085		1561
1086	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1562	SV *get_filter (CBOR *self)
1087	PPCODE:	1563	CODE:
1088	{	1564	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1089	if (!self->cb_sk_object)	1565	OUTPUT:
1090	self->cb_sk_object = newHV ();	1566	RETVAL
1091
1092	if (SvOK (cb))
1093	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1094	else
1095	{
1096	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1097
1098	if (!HvKEYS (self->cb_sk_object))
1099	{
1100	SvREFCNT_dec (self->cb_sk_object);
1101	self->cb_sk_object = 0;
1102	}
1103	}
1104
1105	XPUSHs (ST (0));
1106	}
1107
1108	#endif
1109		1567
1110	void encode (CBOR *self, SV *scalar)	1568	void encode (CBOR *self, SV *scalar)
1111	PPCODE:	1569	PPCODE:
1112	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1570	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1113	XPUSHs (scalar);	1571	XPUSHs (scalar);
…		…
1126	EXTEND (SP, 2);	1584	EXTEND (SP, 2);
1127	PUSHs (sv);	1585	PUSHs (sv);
1128	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1586	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1129	}	1587	}
1130		1588
		1589	void incr_parse (CBOR *self, SV *cborstr)
		1590	ALIAS:
		1591	incr_parse_multiple = 1
		1592	PPCODE:
		1593	{
		1594	if (SvUTF8 (cborstr))
		1595	sv_utf8_downgrade (cborstr, 0);
		1596
		1597	if (!self->incr_count)
		1598	{
		1599	self->incr_count = newAV ();
		1600	self->incr_pos = 0;
		1601	self->incr_need = 1;
		1602
		1603	av_push (self->incr_count, newSViv (1));
		1604	}
		1605
		1606	do
		1607	{
		1608	if (!incr_parse (self, cborstr))
		1609	{
		1610	if (self->incr_need > self->max_size && self->max_size)
		1611	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1612	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1613
		1614	break;
		1615	}
		1616
		1617	SV *sv;
		1618	char *offset;
		1619
		1620	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1621	XPUSHs (sv);
		1622
		1623	sv_chop (cborstr, offset);
		1624
		1625	av_clear (self->incr_count);
		1626	av_push (self->incr_count, newSViv (1));
		1627
		1628	self->incr_pos = 0;
		1629	self->incr_need = self->incr_pos + 1;
		1630	}
		1631	while (ix);
		1632	}
		1633
		1634	void incr_reset (CBOR *self)
		1635	CODE:
		1636	{
		1637	SvREFCNT_dec (self->incr_count);
		1638	self->incr_count = 0;
		1639	}
		1640
1131	void DESTROY (CBOR *self)	1641	void DESTROY (CBOR *self)
1132	CODE:	1642	PPCODE:
1133	SvREFCNT_dec (self->cb_sk_object);	1643	cbor_free (self);
1134	SvREFCNT_dec (self->cb_object);
1135		1644
1136	PROTOTYPES: ENABLE	1645	PROTOTYPES: ENABLE
1137		1646
1138	void encode_cbor (SV *scalar)	1647	void encode_cbor (SV *scalar)
		1648	ALIAS:
		1649	encode_cbor = 0
		1650	encode_cbor_sharing = F_ALLOW_SHARING
1139	PPCODE:	1651	PPCODE:
1140	{	1652	{
1141	CBOR cbor;	1653	CBOR cbor;
1142	cbor_init (&cbor);	1654	cbor_init (&cbor);
		1655	cbor.flags |= ix;
1143	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1656	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1144	XPUSHs (scalar);	1657	XPUSHs (scalar);
1145	}	1658	}
1146		1659
1147	void decode_cbor (SV *cborstr)	1660	void decode_cbor (SV *cborstr)

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