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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.1 by root, Fri Oct 25 23:09:45 2013 UTC vs.
Revision 1.61 by root, Sat Nov 26 02:10:19 2016 UTC

…		…
6	#include <string.h>	6	#include <string.h>
7	#include <stdlib.h>	7	#include <stdlib.h>
8	#include <stdio.h>	8	#include <stdio.h>
9	#include <limits.h>	9	#include <limits.h>
10	#include <float.h>	10	#include <float.h>
		11	#include <inttypes.h>
11		12
		13	#define ECB_NO_THREADS 1
12	#include "ecb.h"	14	#include "ecb.h"
13		15
14	#if defined(__BORLANDC__) || defined(_MSC_VER)	16	// compatibility with perl <5.18
15	# define snprintf _snprintf // C compilers have this in stdio.h	17	#ifndef HvNAMELEN_get
		18	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
16	#endif	19	#endif
		20	#ifndef HvNAMELEN
		21	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		22	#endif
		23	#ifndef HvNAMEUTF8
		24	# define HvNAMEUTF8(hv) 0
		25	#endif
		26	#ifndef SvREFCNT_dec_NN
		27	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		28	#endif
17		29
		30	// known major and minor types
		31	enum cbor_type
		32	{
		33	MAJOR_SHIFT = 5,
		34	MINOR_MASK = 0x1f,
		35
		36	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		37	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		38	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		39	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		40	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		41	MAJOR_MAP = 5 << MAJOR_SHIFT,
		42	MAJOR_TAG = 6 << MAJOR_SHIFT,
		43	MAJOR_MISC = 7 << MAJOR_SHIFT,
		44
		45	// INT/STRING/ARRAY/MAP subtypes
		46	LENGTH_EXT1 = 24,
		47	LENGTH_EXT2 = 25,
		48	LENGTH_EXT4 = 26,
		49	LENGTH_EXT8 = 27,
		50
		51	// SIMPLE types (effectively MISC subtypes)
		52	SIMPLE_FALSE = 20,
		53	SIMPLE_TRUE = 21,
		54	SIMPLE_NULL = 22,
		55	SIMPLE_UNDEF = 23,
		56
		57	// MISC subtype (unused)
		58	MISC_EXT1 = 24,
		59	MISC_FLOAT16 = 25,
		60	MISC_FLOAT32 = 26,
		61	MISC_FLOAT64 = 27,
		62
		63	// BYTES/TEXT/ARRAY/MAP
		64	MINOR_INDEF = 31,
		65	};
		66
		67	// known tags
		68	enum cbor_tag
		69	{
		70	// extensions
		71	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
		72	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
		73	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
		74	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
		75	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
		76	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
		77	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
		78
		79	// rfc7049
		80	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
		81	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
		82	CBOR_TAG_POS_BIGNUM = 2, // byte string
		83	CBOR_TAG_NEG_BIGNUM = 3, // byte string
		84	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
		85	CBOR_TAG_BIGFLOAT = 5, // array
		86
		87	CBOR_TAG_CONV_B64U = 21, // base64url, any
		88	CBOR_TAG_CONV_B64 = 22, // base64, any
		89	CBOR_TAG_CONV_HEX = 23, // base16, any
		90	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
		91
		92	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
		93	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
		94	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
		95	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
		96	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
		97
		98	CBOR_TAG_MAGIC = 55799, // self-describe cbor
		99	};
		100
18	#define F_SHRINK 0x00000200UL	101	#define F_SHRINK 0x00000001UL
19	#define F_ALLOW_UNKNOWN 0x00002000UL	102	#define F_ALLOW_UNKNOWN 0x00000002UL
		103	#define F_ALLOW_SHARING 0x00000004UL
		104	#define F_ALLOW_CYCLES 0x00000008UL
		105	#define F_FORBID_OBJECTS 0x00000010UL
		106	#define F_PACK_STRINGS 0x00000020UL
		107	#define F_TEXT_KEYS 0x00000040UL
		108	#define F_TEXT_STRINGS 0x00000080UL
		109	#define F_VALIDATE_UTF8 0x00000100UL
20		110
21	#define INIT_SIZE 32 // initial scalar size to be allocated	111	#define INIT_SIZE 32 // initial scalar size to be allocated
22		112
23	#define SB do {	113	#define SB do {
24	#define SE } while (0)	114	#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		115
37	#define IN_RANGE_INC(type,val,beg,end) \	116	#define IN_RANGE_INC(type,val,beg,end) \
38	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \	117	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
39	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))	118	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
40		119
…		…
46	#else	125	#else
47	# define CBOR_SLOW 0	126	# define CBOR_SLOW 0
48	# define CBOR_STASH cbor_stash	127	# define CBOR_STASH cbor_stash
49	#endif	128	#endif
50		129
51	static HV *cbor_stash, *cbor_boolean_stash; // CBOR::XS::	130	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
52	static SV *cbor_true, *cbor_false;	131	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
53		132
54	typedef struct {	133	typedef struct {
55	U32 flags;	134	U32 flags;
56	U32 max_depth;	135	U32 max_depth;
57	STRLEN max_size;	136	STRLEN max_size;
		137	SV *filter;
58		138
59	SV *cb_object;	139	// for the incremental parser
60	HV *cb_sk_object;	140	STRLEN incr_pos; // the current offset into the text
		141	STRLEN incr_need; // minimum bytes needed to decode
		142	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
61	} CBOR;	143	} CBOR;
62		144
63	INLINE void	145	ecb_inline void
64	cbor_init (CBOR *cbor)	146	cbor_init (CBOR *cbor)
65	{	147	{
66	Zero (cbor, 1, CBOR);	148	Zero (cbor, 1, CBOR);
67	cbor->max_depth = 512;	149	cbor->max_depth = 512;
68	}	150	}
69		151
		152	ecb_inline void
		153	cbor_free (CBOR *cbor)
		154	{
		155	SvREFCNT_dec (cbor->filter);
		156	SvREFCNT_dec (cbor->incr_count);
		157	}
		158
70	/////////////////////////////////////////////////////////////////////////////	159	/////////////////////////////////////////////////////////////////////////////
71	// utility functions	160	// utility functions
72		161
73	INLINE SV *	162	ecb_inline SV *
74	get_bool (const char *name)	163	get_bool (const char *name)
75	{	164	{
76	SV *sv = get_sv (name, 1);	165	SV *sv = get_sv (name, 1);
77		166
78	SvREADONLY_on (sv);	167	SvREADONLY_on (sv);
79	SvREADONLY_on (SvRV (sv));	168	SvREADONLY_on (SvRV (sv));
80		169
81	return sv;	170	return sv;
82	}	171	}
83		172
84	INLINE void	173	ecb_inline void
85	shrink (SV *sv)	174	shrink (SV *sv)
86	{	175	{
87	sv_utf8_downgrade (sv, 1);	176	sv_utf8_downgrade (sv, 1);
88		177
89	if (SvLEN (sv) > SvCUR (sv) + 1)	178	if (SvLEN (sv) > SvCUR (sv) + 1)
…		…
94	SvPV_renew (sv, SvCUR (sv) + 1);	183	SvPV_renew (sv, SvCUR (sv) + 1);
95	#endif	184	#endif
96	}	185	}
97	}	186	}
98		187
99	/////////////////////////////////////////////////////////////////////////////	188	// minimum length of a string to be registered for stringref
100	// fp hell	189	ecb_inline int
		190	minimum_string_length (UV idx)
		191	{
101		192
102	//TODO	193	return idx <= 23 ? 3
		194	: idx <= 0xffU ? 4
		195	: idx <= 0xffffU ? 5
		196	: idx <= 0xffffffffU ? 7
		197	: 11;
		198	}
103		199
104	/////////////////////////////////////////////////////////////////////////////	200	/////////////////////////////////////////////////////////////////////////////
105	// encoder	201	// encoder
106		202
107	// structure used for encoding CBOR	203	// structure used for encoding CBOR
…		…
110	char *cur; // SvPVX (sv) + current output position	206	char *cur; // SvPVX (sv) + current output position
111	char *end; // SvEND (sv)	207	char *end; // SvEND (sv)
112	SV *sv; // result scalar	208	SV *sv; // result scalar
113	CBOR cbor;	209	CBOR cbor;
114	U32 depth; // recursion level	210	U32 depth; // recursion level
		211	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		212	UV stringref_idx;
		213	HV *shareable; // ptr => index, or 0
		214	UV shareable_idx;
115	} enc_t;	215	} enc_t;
116		216
117	INLINE void	217	ecb_inline void
118	need (enc_t *enc, STRLEN len)	218	need (enc_t *enc, STRLEN len)
119	{	219	{
120	if (expect_false (enc->cur + len >= enc->end))	220	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
121	{	221	{
122	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	222	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
123	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	223	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
124	enc->cur = SvPVX (enc->sv) + cur;	224	enc->cur = SvPVX (enc->sv) + cur;
125	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	225	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
126	}	226	}
127	}	227	}
128		228
129	INLINE void	229	ecb_inline void
130	encode_ch (enc_t *enc, char ch)	230	encode_ch (enc_t *enc, char ch)
131	{	231	{
132	need (enc, 1);	232	need (enc, 1);
133	*enc->cur++ = ch;	233	*enc->cur++ = ch;
134	}	234	}
…		…
136	static void	236	static void
137	encode_uint (enc_t *enc, int major, UV len)	237	encode_uint (enc_t *enc, int major, UV len)
138	{	238	{
139	need (enc, 9);	239	need (enc, 9);
140		240
141	if (len < 24)	241	if (ecb_expect_true (len < LENGTH_EXT1))
142	*enc->cur++ = major | len;	242	*enc->cur++ = major | len;
143	else if (len < 0x100)	243	else if (ecb_expect_true (len <= 0xffU))
144	{	244	{
145	*enc->cur++ = major | 24;	245	*enc->cur++ = major | LENGTH_EXT1;
146	*enc->cur++ = len;	246	*enc->cur++ = len;
147	}	247	}
148	else if (len < 0x10000)	248	else if (len <= 0xffffU)
149	{	249	{
150	*enc->cur++ = major | 25;	250	*enc->cur++ = major | LENGTH_EXT2;
151	*enc->cur++ = len >> 8;	251	*enc->cur++ = len >> 8;
152	*enc->cur++ = len;	252	*enc->cur++ = len;
153	}	253	}
154	else if (len < 0x100000000)	254	else if (len <= 0xffffffffU)
155	{	255	{
156	*enc->cur++ = major | 26;	256	*enc->cur++ = major | LENGTH_EXT4;
157	*enc->cur++ = len >> 24;	257	*enc->cur++ = len >> 24;
158	*enc->cur++ = len >> 16;	258	*enc->cur++ = len >> 16;
159	*enc->cur++ = len >> 8;	259	*enc->cur++ = len >> 8;
160	*enc->cur++ = len;	260	*enc->cur++ = len;
161	}	261	}
162	else if (len)	262	else
163	{	263	{
164	*enc->cur++ = major | 27;	264	*enc->cur++ = major | LENGTH_EXT8;
165	*enc->cur++ = len >> 56;	265	*enc->cur++ = len >> 56;
166	*enc->cur++ = len >> 48;	266	*enc->cur++ = len >> 48;
167	*enc->cur++ = len >> 40;	267	*enc->cur++ = len >> 40;
168	*enc->cur++ = len >> 32;	268	*enc->cur++ = len >> 32;
169	*enc->cur++ = len >> 24;	269	*enc->cur++ = len >> 24;
…		…
171	*enc->cur++ = len >> 8;	271	*enc->cur++ = len >> 8;
172	*enc->cur++ = len;	272	*enc->cur++ = len;
173	}	273	}
174	}	274	}
175		275
176	static void	276	ecb_inline void
		277	encode_tag (enc_t *enc, UV tag)
		278	{
		279	encode_uint (enc, MAJOR_TAG, tag);
		280	}
		281
		282	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		283	ecb_noinline static void
177	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	284	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
178	{	285	{
179	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	286	STRLEN ulen = len;
		287	U8 *p, *pend = (U8 *)str + len;
		288
		289	for (p = (U8 *)str; p < pend; ++p)
		290	ulen += *p >> 7; // count set high bits
		291
		292	encode_uint (enc, MAJOR_TEXT, ulen);
		293
		294	need (enc, ulen);
		295	for (p = (U8 *)str; p < pend; ++p)
		296	if (*p < 0x80)
		297	*enc->cur++ = *p;
		298	else
		299	{
		300	*enc->cur++ = 0xc0 + (*p >> 6);
		301	*enc->cur++ = 0x80 + (*p & 63);
		302	}
		303	}
		304
		305	ecb_inline void
		306	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		307	{
		308	if (ecb_expect_false (upgrade_utf8))
		309	if (!utf8)
		310	{
		311	encode_str_utf8 (enc, utf8, str, len);
		312	return;
		313	}
		314
		315	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
180	need (enc, len);	316	need (enc, len);
181	memcpy (enc->cur, str, len);	317	memcpy (enc->cur, str, len);
182	enc->cur += len;	318	enc->cur += len;
183	}	319	}
184		320
		321	ecb_inline void
		322	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		323	{
		324	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		325	{
		326	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		327
		328	if (SvOK (*svp))
		329	{
		330	// already registered, use stringref
		331	encode_tag (enc, CBOR_TAG_STRINGREF);
		332	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		333	return;
		334	}
		335	else if (len >= minimum_string_length (enc->stringref_idx))
		336	{
		337	// register only
		338	sv_setuv (*svp, enc->stringref_idx);
		339	++enc->stringref_idx;
		340	}
		341	}
		342
		343	encode_str (enc, upgrade_utf8, utf8, str, len);
		344	}
		345
185	static void encode_sv (enc_t *enc, SV *sv);	346	static void encode_sv (enc_t *enc, SV *sv);
186		347
187	static void	348	static void
188	encode_av (enc_t *enc, AV *av)	349	encode_av (enc_t *enc, AV *av)
189	{	350	{
…		…
192	if (enc->depth >= enc->cbor.max_depth)	353	if (enc->depth >= enc->cbor.max_depth)
193	croak (ERR_NESTING_EXCEEDED);	354	croak (ERR_NESTING_EXCEEDED);
194		355
195	++enc->depth;	356	++enc->depth;
196		357
197	encode_uint (enc, 0x80, len + 1);	358	encode_uint (enc, MAJOR_ARRAY, len + 1);
198		359
		360	if (SvMAGICAL (av))
199	for (i = 0; i <= len; ++i)	361	for (i = 0; i <= len; ++i)
200	{	362	{
201	SV **svp = av_fetch (av, i, 0);	363	SV **svp = av_fetch (av, i, 0);
202	encode_sv (enc, svp ? *svp : &PL_sv_undef);	364	encode_sv (enc, svp ? *svp : &PL_sv_undef);
203	}	365	}
		366	else
		367	for (i = 0; i <= len; ++i)
		368	{
		369	SV *sv = AvARRAY (av)[i];
		370	encode_sv (enc, sv ? sv : &PL_sv_undef);
		371	}
204		372
205	--enc->depth;	373	--enc->depth;
206	}	374	}
207		375
208	static void	376	static void
…		…
217		385
218	int pairs = hv_iterinit (hv);	386	int pairs = hv_iterinit (hv);
219	int mg = SvMAGICAL (hv);	387	int mg = SvMAGICAL (hv);
220		388
221	if (mg)	389	if (mg)
222	encode_ch (enc, 0xa0 | 31);	390	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
223	else	391	else
224	encode_uint (enc, 0xa0, pairs);	392	encode_uint (enc, MAJOR_MAP, pairs);
225		393
226	while ((he = hv_iternext (hv)))	394	while ((he = hv_iternext (hv)))
227	{	395	{
228	if (HeKLEN (he) == HEf_SVKEY)	396	if (HeKLEN (he) == HEf_SVKEY)
229	encode_sv (enc, HeSVKEY (he));	397	encode_sv (enc, HeSVKEY (he));
230	else	398	else
231	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	399	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
232		400
233	encode_sv (enc, expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	401	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
234	}	402	}
235		403
236	if (mg)	404	if (mg)
237	encode_ch (enc, 0xe0 | 31);	405	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
238		406
239	--enc->depth;	407	--enc->depth;
240	}	408	}
241		409
242	// encode objects, arrays and special \0=false and \1=true values.	410	// encode objects, arrays and special \0=false and \1=true values.
243	static void	411	static void
244	encode_rv (enc_t *enc, SV *sv)	412	encode_rv (enc_t *enc, SV *sv)
245	{	413	{
246	svtype svt;
247
248	SvGETMAGIC (sv);	414	SvGETMAGIC (sv);
		415
249	svt = SvTYPE (sv);	416	svtype svt = SvTYPE (sv);
250		417
251	if (expect_false (SvOBJECT (sv)))	418	if (ecb_expect_false (SvOBJECT (sv)))
252	{	419	{
253	HV *stash = !CBOR_SLOW || cbor_boolean_stash	420	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
254	? cbor_boolean_stash	421	? types_boolean_stash
		422	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		423	HV *error_stash = !CBOR_SLOW || types_error_stash
		424	? types_error_stash
		425	: gv_stashpv ("Types::Serialiser::Error", 1);
		426	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		427	? cbor_tagged_stash
255	: gv_stashpv ("CBOR::XS::Boolean", 1);	428	: gv_stashpv ("CBOR::XS::Tagged" , 1);
256		429
257	if (SvSTASH (sv) == stash)	430	HV *stash = SvSTASH (sv);
258	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	431
		432	if (stash == boolean_stash)
		433	{
		434	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		435	return;
		436	}
		437	else if (stash == error_stash)
		438	{
		439	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		440	return;
		441	}
		442	else if (stash == tagged_stash)
		443	{
		444	if (svt != SVt_PVAV)
		445	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		446
		447	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
		448	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		449
		450	return;
		451	}
		452	}
		453
		454	if (ecb_expect_false (SvREFCNT (sv) > 1)
		455	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		456	{
		457	if (!enc->shareable)
		458	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		459
		460	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		461
		462	if (SvOK (*svp))
		463	{
		464	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		465	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		466	return;
		467	}
259	else	468	else
260	{	469	{
261	#if 0 //TODO	470	sv_setuv (*svp, enc->shareable_idx);
262	if (enc->cbor.flags & F_CONV_BLESSED)	471	++enc->shareable_idx;
		472	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		473	}
		474	}
		475
		476	if (ecb_expect_false (SvOBJECT (sv)))
		477	{
		478	HV *stash = SvSTASH (sv);
		479	GV *method;
		480
		481	if (enc->cbor.flags & F_FORBID_OBJECTS)
		482	croak ("encountered object '%s', but forbid_objects is enabled",
		483	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		484	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
263	{	485	{
		486	dSP;
		487
		488	ENTER; SAVETMPS;
		489	PUSHMARK (SP);
264	// we re-bless the reference to get overload and other niceties right	490	// 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)));	491	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
273		492
274	// calling with G_SCALAR ensures that we always get a 1 return value
275	PUTBACK;	493	PUTBACK;
		494	// G_SCALAR ensures that return value is 1
276	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	495	call_sv ((SV *)GvCV (method), G_SCALAR);
277	SPAGAIN;	496	SPAGAIN;
278		497
279	// catch this surprisingly common error	498	// catch this surprisingly common error
280	if (SvROK (TOPs) && SvRV (TOPs) == sv)	499	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)));	500	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
282		501
283	sv = POPs;
284	PUTBACK;
285
286	encode_sv (enc, sv);	502	encode_sv (enc, POPs);
287		503
		504	PUTBACK;
		505
288	FREETMPS; LEAVE;	506	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	}	507	}
296	else if (enc->cbor.flags & F_ALLOW_BLESSED)	508	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
297	encode_str (enc, "null", 4, 0);	509	{
		510	dSP;
		511
		512	ENTER; SAVETMPS;
		513	SAVESTACK_POS ();
		514	PUSHMARK (SP);
		515	EXTEND (SP, 2);
		516	// we re-bless the reference to get overload and other niceties right
		517	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		518	PUSHs (sv_cbor);
		519
		520	PUTBACK;
		521	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		522	SPAGAIN;
		523
		524	// catch this surprisingly common error
		525	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		526	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		527
		528	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		529	encode_uint (enc, MAJOR_ARRAY, count + 1);
		530	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		531
		532	while (count)
		533	encode_sv (enc, SP[1 - count--]);
		534
		535	PUTBACK;
		536
		537	FREETMPS; LEAVE;
		538	}
298	else	539	else
299	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	540	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
300	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	541	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
301	#endif
302	}
303	}	542	}
304	else if (svt == SVt_PVHV)	543	else if (svt == SVt_PVHV)
305	encode_hv (enc, (HV *)sv);	544	encode_hv (enc, (HV *)sv);
306	else if (svt == SVt_PVAV)	545	else if (svt == SVt_PVAV)
307	encode_av (enc, (AV *)sv);	546	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	547	else
326	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	548	{
327	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	549	encode_tag (enc, CBOR_TAG_INDIRECTION);
		550	encode_sv (enc, sv);
		551	}
328	}	552	}
329		553
330	static void	554	static void
331	encode_nv (enc_t *enc, SV *sv)	555	encode_nv (enc_t *enc, SV *sv)
332	{	556	{
333	double nv = SvNVX (sv);	557	double nv = SvNVX (sv);
334		558
335	need (enc, 9);	559	need (enc, 9);
336		560
337	if (expect_false (nv == (U32)nv))	561	if (ecb_expect_false (nv == (NV)(U32)nv))
338	encode_uint (enc, 0x00, (U32)nv);	562	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
339	//TODO: maybe I32?	563	//TODO: maybe I32?
340	else if (expect_false (nv == (float)nv))	564	else if (ecb_expect_false (nv == (float)nv))
341	{	565	{
342	uint32_t fp = ecb_float_to_binary32 (nv);	566	uint32_t fp = ecb_float_to_binary32 (nv);
343		567
344	*enc->cur++ = 0xe0 | 26;	568	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
345		569
346	if (!ecb_big_endian ())	570	if (!ecb_big_endian ())
347	fp = ecb_bswap32 (fp);	571	fp = ecb_bswap32 (fp);
348		572
349	memcpy (enc->cur, &fp, 4);	573	memcpy (enc->cur, &fp, 4);
…		…
351	}	575	}
352	else	576	else
353	{	577	{
354	uint64_t fp = ecb_double_to_binary64 (nv);	578	uint64_t fp = ecb_double_to_binary64 (nv);
355		579
356	*enc->cur++ = 0xe0 | 27;	580	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
357		581
358	if (!ecb_big_endian ())	582	if (!ecb_big_endian ())
359	fp = ecb_bswap64 (fp);	583	fp = ecb_bswap64 (fp);
360		584
361	memcpy (enc->cur, &fp, 8);	585	memcpy (enc->cur, &fp, 8);
…		…
370		594
371	if (SvPOKp (sv))	595	if (SvPOKp (sv))
372	{	596	{
373	STRLEN len;	597	STRLEN len;
374	char *str = SvPV (sv, len);	598	char *str = SvPV (sv, len);
375	encode_str (enc, SvUTF8 (sv), str, len);	599	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
376	}	600	}
377	else if (SvNOKp (sv))	601	else if (SvNOKp (sv))
378	encode_nv (enc, sv);	602	encode_nv (enc, sv);
379	else if (SvIOKp (sv))	603	else if (SvIOKp (sv))
380	{	604	{
381	if (SvIsUV (sv))	605	if (SvIsUV (sv))
382	encode_uint (enc, 0x00, SvUVX (sv));	606	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
383	else if (SvIVX (sv) >= 0)	607	else if (SvIVX (sv) >= 0)
384	encode_uint (enc, 0x00, SvIVX (sv));	608	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
385	else	609	else
386	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	610	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
387	}	611	}
388	else if (SvROK (sv))	612	else if (SvROK (sv))
389	encode_rv (enc, SvRV (sv));	613	encode_rv (enc, SvRV (sv));
390	else if (!SvOK (sv))	614	else if (!SvOK (sv))
391	encode_ch (enc, 0xe0 | 22);	615	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
392	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	616	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
393	encode_ch (enc, 0xe0 | 23);	617	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
394	else	618	else
395	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	619	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
396	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	620	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
397	}	621	}
398		622
399	static SV *	623	static SV *
400	encode_cbor (SV *scalar, CBOR *cbor)	624	encode_cbor (SV *scalar, CBOR *cbor)
401	{	625	{
402	enc_t enc;	626	enc_t enc = { 0 };
403		627
404	enc.cbor = *cbor;	628	enc.cbor = *cbor;
405	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	629	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
406	enc.cur = SvPVX (enc.sv);	630	enc.cur = SvPVX (enc.sv);
407	enc.end = SvEND (enc.sv);	631	enc.end = SvEND (enc.sv);
408	enc.depth = 0;
409		632
410	SvPOK_only (enc.sv);	633	SvPOK_only (enc.sv);
		634
		635	if (cbor->flags & F_PACK_STRINGS)
		636	{
		637	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		638	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		639	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		640	}
		641
411	encode_sv (&enc, scalar);	642	encode_sv (&enc, scalar);
412		643
413	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	644	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
414	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	645	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
415		646
…		…
429	U8 *end; // end of input string	660	U8 *end; // end of input string
430	const char *err; // parse error, if != 0	661	const char *err; // parse error, if != 0
431	CBOR cbor;	662	CBOR cbor;
432	U32 depth; // recursion depth	663	U32 depth; // recursion depth
433	U32 maxdepth; // recursion depth limit	664	U32 maxdepth; // recursion depth limit
		665	AV *shareable;
		666	AV *stringref;
		667	SV *decode_tagged;
		668	SV *err_sv; // optional sv for error, needs to be freed
434	} dec_t;	669	} dec_t;
435		670
436	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	671	// set dec->err to ERRSV
		672	ecb_cold static void
		673	err_errsv (dec_t *dec)
		674	{
		675	if (!dec->err)
		676	{
		677	dec->err_sv = newSVsv (ERRSV);
437		678
438	#define WANT(len) if (expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data");	679	// chop off the trailing \n
		680	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		681	*SvEND (dec->err_sv) = 0;
439		682
		683	dec->err = SvPVutf8_nolen (dec->err_sv);
		684	}
		685	}
		686
		687	// the following functions are used to reduce code size and help the compiler to optimise
		688	ecb_cold static void
		689	err_set (dec_t *dec, const char *reason)
		690	{
		691	if (!dec->err)
		692	dec->err = reason;
		693	}
		694
		695	ecb_cold static void
		696	err_unexpected_end (dec_t *dec)
		697	{
		698	err_set (dec, "unexpected end of CBOR data");
		699	}
		700
		701	ecb_cold static void
		702	err_nesting_exceeded (dec_t *dec)
		703	{
		704	err_set (dec, ERR_NESTING_EXCEEDED);
		705	}
		706
		707	#define ERR_DO(do) SB do; goto fail; SE
		708	#define ERR(reason) ERR_DO (err_set (dec, reason))
		709	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		710
		711	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		712
440	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	713	#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	714	#define DEC_DEC_DEPTH --dec->depth
442		715
443	static UV	716	static UV
444	decode_uint (dec_t *dec)	717	decode_uint (dec_t *dec)
445	{	718	{
446	switch (*dec->cur & 31)	719	U8 m = *dec->cur & MINOR_MASK;
447	{	720	++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		721
453	case 24:	722	if (ecb_expect_true (m < LENGTH_EXT1))
		723	return m;
		724	else if (ecb_expect_true (m == LENGTH_EXT1))
		725	{
454	WANT (2);	726	WANT (1);
455	dec->cur += 2;	727	dec->cur += 1;
456	return dec->cur[-1];	728	return dec->cur[-1];
457		729	}
458	case 25:	730	else if (ecb_expect_true (m == LENGTH_EXT2))
		731	{
459	WANT (3);	732	WANT (2);
460	dec->cur += 3;	733	dec->cur += 2;
461	return (((UV)dec->cur[-2]) << 8)	734	return (((UV)dec->cur[-2]) << 8)
462	| ((UV)dec->cur[-1]);	735	| ((UV)dec->cur[-1]);
463		736	}
464	case 26:	737	else if (ecb_expect_true (m == LENGTH_EXT4))
		738	{
465	WANT (5);	739	WANT (4);
466	dec->cur += 5;	740	dec->cur += 4;
467	return (((UV)dec->cur[-4]) << 24)	741	return (((UV)dec->cur[-4]) << 24)
468	| (((UV)dec->cur[-3]) << 16)	742	| (((UV)dec->cur[-3]) << 16)
469	| (((UV)dec->cur[-2]) << 8)	743	| (((UV)dec->cur[-2]) << 8)
470	| ((UV)dec->cur[-1]);	744	| ((UV)dec->cur[-1]);
471		745	}
472	case 27:	746	else if (ecb_expect_true (m == LENGTH_EXT8))
		747	{
473	WANT (9);	748	WANT (8);
474	dec->cur += 9;	749	dec->cur += 8;
		750
		751	return
		752	#if UVSIZE < 8
		753	0
		754	#else
475	return (((UV)dec->cur[-8]) << 56)	755	(((UV)dec->cur[-8]) << 56)
476	| (((UV)dec->cur[-7]) << 48)	756	| (((UV)dec->cur[-7]) << 48)
477	| (((UV)dec->cur[-6]) << 40)	757	| (((UV)dec->cur[-6]) << 40)
478	| (((UV)dec->cur[-5]) << 32)	758	| (((UV)dec->cur[-5]) << 32)
		759	#endif
479	| (((UV)dec->cur[-4]) << 24)	760	| (((UV)dec->cur[-4]) << 24)
480	| (((UV)dec->cur[-3]) << 16)	761	| (((UV)dec->cur[-3]) << 16)
481	| (((UV)dec->cur[-2]) << 8)	762	| (((UV)dec->cur[-2]) << 8)
482	| ((UV)dec->cur[-1]);	763	| ((UV)dec->cur[-1]);
483		764	}
484	default:	765	else
485	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	766	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
486	}
487		767
488	fail:	768	fail:
489	return 0;	769	return 0;
490	}	770	}
491		771
…		…
496	{	776	{
497	AV *av = newAV ();	777	AV *av = newAV ();
498		778
499	DEC_INC_DEPTH;	779	DEC_INC_DEPTH;
500		780
501	if ((*dec->cur & 31) == 31)	781	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
502	{	782	{
503	++dec->cur;	783	++dec->cur;
504		784
505	for (;;)	785	for (;;)
506	{	786	{
507	WANT (1);	787	WANT (1);
508		788
509	if (*dec->cur == 0xe0 | 31)	789	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
510	{	790	{
511	++dec->cur;	791	++dec->cur;
512	break;	792	break;
513	}	793	}
514		794
515	av_push (av, decode_sv (dec));	795	av_push (av, decode_sv (dec));
516	}	796	}
517	}	797	}
518	else	798	else
519	{	799	{
520	int i, len = decode_uint (dec);	800	UV i, len = decode_uint (dec);
521		801
		802	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);	803	av_fill (av, len - 1);
523		804
524	for (i = 0; i < len; ++i)	805	for (i = 0; i < len; ++i)
525	AvARRAY (av)[i] = decode_sv (dec);	806	AvARRAY (av)[i] = decode_sv (dec);
526	}	807	}
…		…
532	SvREFCNT_dec (av);	813	SvREFCNT_dec (av);
533	DEC_DEC_DEPTH;	814	DEC_DEC_DEPTH;
534	return &PL_sv_undef;	815	return &PL_sv_undef;
535	}	816	}
536		817
		818	static void
		819	decode_he (dec_t *dec, HV *hv)
		820	{
		821	// for speed reasons, we specialcase single-string
		822	// byte or utf-8 strings as keys, but only when !stringref
		823
		824	if (ecb_expect_true (!dec->stringref))
		825	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		826	{
		827	STRLEN len = decode_uint (dec);
		828	char *key = (char *)dec->cur;
		829
		830	WANT (len);
		831	dec->cur += len;
		832
		833	hv_store (hv, key, len, decode_sv (dec), 0);
		834
		835	return;
		836	}
		837	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		838	{
		839	STRLEN len = decode_uint (dec);
		840	char *key = (char *)dec->cur;
		841
		842	WANT (len);
		843	dec->cur += len;
		844
		845	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		846	if (!is_utf8_string (key, len))
		847	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		848
		849	hv_store (hv, key, -len, decode_sv (dec), 0);
		850
		851	return;
		852	}
		853
		854	SV *k = decode_sv (dec);
		855	SV *v = decode_sv (dec);
		856
		857	// we leak memory if uncaught exceptions are thrown by random magical
		858	// methods, and this is hopefully the only place where it can happen,
		859	// so if there is a chance of an exception, take the very slow path.
		860	// since catching exceptions is "undocumented/internal/forbidden" by
		861	// the new p5p powers, we need to call out to a perl function :/
		862	if (ecb_expect_false (SvAMAGIC (k)))
		863	{
		864	dSP;
		865
		866	ENTER; SAVETMPS;
		867	PUSHMARK (SP);
		868	EXTEND (SP, 3);
		869	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		870	PUSHs (sv_2mortal (k));
		871	PUSHs (sv_2mortal (v));
		872
		873	PUTBACK;
		874	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		875	SPAGAIN;
		876
		877	FREETMPS; LEAVE;
		878
		879	if (SvTRUE (ERRSV))
		880	ERR_ERRSV;
		881
		882	return;
		883	}
		884
		885	hv_store_ent (hv, k, v, 0);
		886	SvREFCNT_dec (k);
		887
		888	fail:
		889	;
		890	}
		891
537	static SV *	892	static SV *
538	decode_hv (dec_t *dec)	893	decode_hv (dec_t *dec)
539	{	894	{
540	HV *hv = newHV ();	895	HV *hv = newHV ();
541		896
542	DEC_INC_DEPTH;	897	DEC_INC_DEPTH;
543		898
544	if ((*dec->cur & 31) == 31)	899	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
545	{	900	{
546	++dec->cur;	901	++dec->cur;
547		902
548	for (;;)	903	for (;;)
549	{	904	{
550	WANT (1);	905	WANT (1);
551		906
552	if (*dec->cur == 0xe0 | 31)	907	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
553	{	908	{
554	++dec->cur;	909	++dec->cur;
555	break;	910	break;
556	}	911	}
557		912
558	SV *k = decode_sv (dec);	913	decode_he (dec, hv);
559	SV *v = decode_sv (dec);
560
561	hv_store_ent (hv, k, v, 0);
562	}	914	}
563	}	915	}
564	else	916	else
565	{	917	{
566	int len = decode_uint (dec);	918	UV pairs = decode_uint (dec);
567		919
		920	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		921
568	while (len--)	922	while (pairs--)
569	{	923	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	}	924	}
576		925
577	DEC_DEC_DEPTH;	926	DEC_DEC_DEPTH;
578	return newRV_noinc ((SV *)hv);	927	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		928
735	fail:	929	fail:
736	SvREFCNT_dec (hv);	930	SvREFCNT_dec (hv);
737	DEC_DEC_DEPTH;	931	DEC_DEC_DEPTH;
738	return &PL_sv_undef;	932	return &PL_sv_undef;
739	}	933	}
740		934
741	static SV *	935	static SV *
742	decode_str (dec_t *dec, int utf8)	936	decode_str (dec_t *dec, int utf8)
743	{	937	{
744	SV *sv;	938	SV *sv = 0;
745		939
746	if ((*dec->cur & 31) == 31)	940	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
747	{	941	{
		942	// indefinite length strings
748	++dec->cur;	943	++dec->cur;
749		944
		945	U8 major = *dec->cur & MAJOR_MISC;
		946
750	sv = newSVpvn ("", 0);	947	sv = newSVpvn ("", 0);
751		948
752	// not very fast, and certainly not robust against illegal input
753	for (;;)	949	for (;;)
754	{	950	{
755	WANT (1);	951	WANT (1);
756		952
757	if (*dec->cur == 0xe0 | 31)	953	if ((*dec->cur - major) > LENGTH_EXT8)
		954	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
758	{	955	{
759	++dec->cur;	956	++dec->cur;
760	break;	957	break;
761	}	958	}
		959	else
		960	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
762		961
763	SV *sv2 = decode_sv (dec);	962	STRLEN len = decode_uint (dec);
764	sv_catsv (sv, sv2);	963
		964	WANT (len);
		965	sv_catpvn (sv, dec->cur, len);
		966	dec->cur += len;
765	}	967	}
766	}	968	}
767	else	969	else
768	{	970	{
769	STRLEN len = decode_uint (dec);	971	STRLEN len = decode_uint (dec);
770		972
771	WANT (len);	973	WANT (len);
772	sv = newSVpvn (dec->cur, len);	974	sv = newSVpvn (dec->cur, len);
773	dec->cur += len;	975	dec->cur += len;
		976
		977	if (ecb_expect_false (dec->stringref)
		978	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		979	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
774	}	980	}
775		981
776	if (utf8)	982	if (utf8)
		983	{
		984	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		985	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		986	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		987
777	SvUTF8_on (sv);	988	SvUTF8_on (sv);
		989	}
778		990
779	return sv;	991	return sv;
780		992
781	fail:	993	fail:
		994	SvREFCNT_dec (sv);
		995	return &PL_sv_undef;
		996	}
		997
		998	static SV *
		999	decode_tagged (dec_t *dec)
		1000	{
		1001	SV *sv = 0;
		1002	UV tag = decode_uint (dec);
		1003
		1004	WANT (1);
		1005
		1006	switch (tag)
		1007	{
		1008	case CBOR_TAG_MAGIC:
		1009	sv = decode_sv (dec);
		1010	break;
		1011
		1012	case CBOR_TAG_INDIRECTION:
		1013	sv = newRV_noinc (decode_sv (dec));
		1014	break;
		1015
		1016	case CBOR_TAG_STRINGREF_NAMESPACE:
		1017	{
		1018	// do nmot use SAVETMPS/FREETMPS, as these will
		1019	// erase mortalised caches, e.g. "shareable"
		1020	ENTER;
		1021
		1022	SAVESPTR (dec->stringref);
		1023	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1024
		1025	sv = decode_sv (dec);
		1026
		1027	LEAVE;
		1028	}
		1029	break;
		1030
		1031	case CBOR_TAG_STRINGREF:
		1032	{
		1033	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1034	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1035
		1036	UV idx = decode_uint (dec);
		1037
		1038	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		1039	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1040
		1041	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1042	}
		1043	break;
		1044
		1045	case CBOR_TAG_VALUE_SHAREABLE:
		1046	{
		1047	if (ecb_expect_false (!dec->shareable))
		1048	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1049
		1050	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1051	{
		1052	sv = newSV (0);
		1053	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1054
		1055	SV *osv = decode_sv (dec);
		1056	sv_setsv (sv, osv);
		1057	SvREFCNT_dec_NN (osv);
		1058	}
		1059	else
		1060	{
		1061	av_push (dec->shareable, &PL_sv_undef);
		1062	int idx = AvFILLp (dec->shareable);
		1063	sv = decode_sv (dec);
		1064	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1065	}
		1066	}
		1067	break;
		1068
		1069	case CBOR_TAG_VALUE_SHAREDREF:
		1070	{
		1071	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1072	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1073
		1074	UV idx = decode_uint (dec);
		1075
		1076	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		1077	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1078
		1079	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1080
		1081	if (sv == &PL_sv_undef)
		1082	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1083	}
		1084	break;
		1085
		1086	case CBOR_TAG_PERL_OBJECT:
		1087	{
		1088	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1089	goto filter;
		1090
		1091	sv = decode_sv (dec);
		1092
		1093	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1094	ERR ("corrupted CBOR data (non-array perl object)");
		1095
		1096	AV *av = (AV *)SvRV (sv);
		1097	int len = av_len (av) + 1;
		1098	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1099
		1100	if (!stash)
		1101	ERR ("cannot decode perl-object (package does not exist)");
		1102
		1103	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1104
		1105	if (!method)
		1106	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1107
		1108	dSP;
		1109
		1110	ENTER; SAVETMPS;
		1111	PUSHMARK (SP);
		1112	EXTEND (SP, len + 1);
		1113	// we re-bless the reference to get overload and other niceties right
		1114	PUSHs (*av_fetch (av, 0, 1));
		1115	PUSHs (sv_cbor);
		1116
		1117	int i;
		1118
		1119	for (i = 1; i < len; ++i)
		1120	PUSHs (*av_fetch (av, i, 1));
		1121
		1122	PUTBACK;
		1123	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1124	SPAGAIN;
		1125
		1126	if (SvTRUE (ERRSV))
		1127	{
		1128	FREETMPS; LEAVE;
		1129	ERR_ERRSV;
		1130	}
		1131
		1132	SvREFCNT_dec (sv);
		1133	sv = SvREFCNT_inc (POPs);
		1134
		1135	PUTBACK;
		1136
		1137	FREETMPS; LEAVE;
		1138	}
		1139	break;
		1140
		1141	default:
		1142	filter:
		1143	{
		1144	SV *tag_sv = newSVuv (tag);
		1145
		1146	sv = decode_sv (dec);
		1147
		1148	dSP;
		1149	ENTER; SAVETMPS;
		1150	SAVESTACK_POS ();
		1151	PUSHMARK (SP);
		1152	EXTEND (SP, 2);
		1153	PUSHs (tag_sv);
		1154	PUSHs (sv);
		1155
		1156	PUTBACK;
		1157	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1158	SPAGAIN;
		1159
		1160	if (SvTRUE (ERRSV))
		1161	{
		1162	SvREFCNT_dec (tag_sv);
		1163	FREETMPS; LEAVE;
		1164	ERR_ERRSV;
		1165	}
		1166
		1167	if (count)
		1168	{
		1169	SvREFCNT_dec (tag_sv);
		1170	SvREFCNT_dec (sv);
		1171	sv = SvREFCNT_inc (POPs);
		1172	}
		1173	else
		1174	{
		1175	AV *av = newAV ();
		1176	av_push (av, tag_sv);
		1177	av_push (av, sv);
		1178
		1179	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1180	? cbor_tagged_stash
		1181	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1182	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1183	}
		1184
		1185	PUTBACK;
		1186
		1187	FREETMPS; LEAVE;
		1188	}
		1189	break;
		1190	}
		1191
		1192	return sv;
		1193
		1194	fail:
		1195	SvREFCNT_dec (sv);
782	return &PL_sv_undef;	1196	return &PL_sv_undef;
783	}	1197	}
784		1198
785	static SV *	1199	static SV *
786	decode_sv (dec_t *dec)	1200	decode_sv (dec_t *dec)
787	{	1201	{
788	WANT (1);	1202	WANT (1);
789		1203
790	switch (*dec->cur >> 5)	1204	switch (*dec->cur >> MAJOR_SHIFT)
791	{	1205	{
792	case 0: // unsigned int	1206	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
793	//TODO: 64 bit values on 3 2bit perls	1207	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
794	return newSVuv (decode_uint (dec));	1208	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
795	case 1: // negative int	1209	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
796	return newSViv (-1 - (IV)decode_uint (dec));	1210	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
797	case 2: // octet string	1211	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
798	return decode_str (dec, 0);	1212	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
799	case 3: // utf-8 string	1213
800	return decode_str (dec, 1);	1214	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)	1215	switch (*dec->cur++ & MINOR_MASK)
810	{	1216	{
811	case 20:	1217	case SIMPLE_FALSE:
812	#if CBOR_SLOW	1218	#if CBOR_SLOW
813	cbor_false = get_bool ("CBOR::XS::false");	1219	types_false = get_bool ("Types::Serialiser::false");
814	#endif	1220	#endif
815	return newSVsv (cbor_false);	1221	return newSVsv (types_false);
816	case 21:	1222	case SIMPLE_TRUE:
817	#if CBOR_SLOW	1223	#if CBOR_SLOW
818	cbor_true = get_bool ("CBOR::XS::true");	1224	types_true = get_bool ("Types::Serialiser::true");
819	#endif	1225	#endif
820	return newSVsv (cbor_true);	1226	return newSVsv (types_true);
821	case 22:	1227	case SIMPLE_NULL:
822	return newSVsv (&PL_sv_undef);	1228	return newSVsv (&PL_sv_undef);
		1229	case SIMPLE_UNDEF:
		1230	#if CBOR_SLOW
		1231	types_error = get_bool ("Types::Serialiser::error");
		1232	#endif
		1233	return newSVsv (types_error);
823		1234
824	case 25:	1235	case MISC_FLOAT16:
825	// half float
826	abort ();
827	break;	1236	{
		1237	WANT (2);
828		1238
		1239	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
		1240	dec->cur += 2;
		1241
		1242	return newSVnv (ecb_binary16_to_float (fp));
		1243	}
		1244
829	case 26:	1245	case MISC_FLOAT32:
830	{	1246	{
831	uint32_t fp;	1247	uint32_t fp;
832	WANT (4);	1248	WANT (4);
833	memcpy (&fp, dec->cur, 4);	1249	memcpy (&fp, dec->cur, 4);
834	dec->cur += 4;	1250	dec->cur += 4;
…		…
837	fp = ecb_bswap32 (fp);	1253	fp = ecb_bswap32 (fp);
838		1254
839	return newSVnv (ecb_binary32_to_float (fp));	1255	return newSVnv (ecb_binary32_to_float (fp));
840	}	1256	}
841		1257
842	case 27:	1258	case MISC_FLOAT64:
843	{	1259	{
844	uint64_t fp;	1260	uint64_t fp;
845	WANT (8);	1261	WANT (8);
846	memcpy (&fp, dec->cur, 8);	1262	memcpy (&fp, dec->cur, 8);
847	dec->cur += 8;	1263	dec->cur += 8;
…		…
850	fp = ecb_bswap64 (fp);	1266	fp = ecb_bswap64 (fp);
851		1267
852	return newSVnv (ecb_binary64_to_double (fp));	1268	return newSVnv (ecb_binary64_to_double (fp));
853	}	1269	}
854		1270
855	// 0..19 unassigned	1271	// 0..19 unassigned simple
856	// 24 reserved + unassigned (reserved values are not encodable)	1272	// 24 reserved + unassigned simple (reserved values are not encodable)
		1273	// 28-30 unassigned misc
		1274	// 31 break code
857	default:	1275	default:
858	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1276	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
859	}	1277	}
860		1278
861	break;	1279	break;
862	}	1280	}
863	#if 0
864	switch (*dec->cur)
865	{
866	//case '"': ++dec->cur; return decode_str (dec);
867	case '[': ++dec->cur; return decode_av (dec);
868	case '{': ++dec->cur; return decode_hv (dec);
869
870	case '-':
871	case '0': case '1': case '2': case '3': case '4':
872	case '5': case '6': case '7': case '8': case '9':
873	//TODO return decode_num (dec);
874
875	case 't':
876	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
877	{
878	dec->cur += 4;
879	#if CBOR_SLOW
880	cbor_true = get_bool ("CBOR::XS::true");
881	#endif
882	return newSVsv (cbor_true);
883	}
884	else
885	ERR ("'true' expected");
886
887	break;
888
889	case 'f':
890	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
891	{
892	dec->cur += 5;
893	#if CBOR_SLOW
894	cbor_false = get_bool ("CBOR::XS::false");
895	#endif
896	return newSVsv (cbor_false);
897	}
898	else
899	ERR ("'false' expected");
900
901	break;
902
903	case 'n':
904	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
905	{
906	dec->cur += 4;
907	return newSVsv (&PL_sv_undef);
908	}
909	else
910	ERR ("'null' expected");
911
912	break;
913
914	default:
915	ERR ("malformed CBOR string, neither array, object, number, string or atom");
916	break;
917	}
918	#endif
919		1281
920	fail:	1282	fail:
921	return &PL_sv_undef;	1283	return &PL_sv_undef;
922	}	1284	}
923		1285
924	static SV *	1286	static SV *
925	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1287	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
926	{	1288	{
927	dec_t dec;	1289	dec_t dec = { 0 };
928	SV *sv;	1290	SV *sv;
		1291	STRLEN len;
		1292	char *data = SvPVbyte (string, len);
929		1293
930	/* work around bugs in 5.10 where manipulating magic values
931	* makes perl ignore the magic in subsequent accesses.
932	* also make a copy of non-PV values, to get them into a clean
933	* state (SvPV should do that, but it's buggy, see below).
934	*/
935	/*SvGETMAGIC (string);*/
936	if (SvMAGICAL (string) || !SvPOK (string))
937	string = sv_2mortal (newSVsv (string));
938
939	SvUPGRADE (string, SVt_PV);
940
941	/* work around a bug in perl 5.10, which causes SvCUR to fail an
942	* assertion with -DDEBUGGING, although SvCUR is documented to
943	* return the xpv_cur field which certainly exists after upgrading.
944	* according to nicholas clark, calling SvPOK fixes this.
945	* But it doesn't fix it, so try another workaround, call SvPV_nolen
946	* and hope for the best.
947	* Damnit, SvPV_nolen still trips over yet another assertion. This
948	* assertion business is seriously broken, try yet another workaround
949	* for the broken -DDEBUGGING.
950	*/
951	{
952	#ifdef DEBUGGING
953	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
954	#else
955	STRLEN offset = SvCUR (string);
956	#endif
957
958	if (offset > cbor->max_size && cbor->max_size)	1294	if (len > cbor->max_size && cbor->max_size)
959	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1295	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
960	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1296	(unsigned long)len, (unsigned long)cbor->max_size);
961	}
962
963	sv_utf8_downgrade (string, 0);
964		1297
965	dec.cbor = *cbor;	1298	dec.cbor = *cbor;
966	dec.cur = (U8 *)SvPVX (string);	1299	dec.cur = (U8 *)data;
967	dec.end = (U8 *)SvEND (string);	1300	dec.end = (U8 *)data + len;
968	dec.err = 0;
969	dec.depth = 0;
970
971	if (dec.cbor.cb_object || dec.cbor.cb_sk_object)
972	;//TODO dec.cbor.flags |= F_HOOK;
973		1301
974	sv = decode_sv (&dec);	1302	sv = decode_sv (&dec);
975		1303
976	if (offset_return)	1304	if (offset_return)
977	*offset_return = dec.cur;	1305	*offset_return = dec.cur;
978		1306
979	if (!(offset_return || !sv))	1307	if (!(offset_return || !sv))
980	{
981	if (*dec.cur && !dec.err)	1308	if (dec.cur != dec.end && !dec.err)
982	{
983	dec.err = "garbage after CBOR object";	1309	dec.err = "garbage after CBOR object";
		1310
		1311	if (dec.err)
		1312	{
		1313	if (dec.shareable)
		1314	{
		1315	// need to break cyclic links, which would all be in shareable
		1316	int i;
		1317	SV **svp;
		1318
		1319	for (i = av_len (dec.shareable) + 1; i--; )
		1320	if ((svp = av_fetch (dec.shareable, i, 0)))
		1321	sv_setsv (*svp, &PL_sv_undef);
		1322	}
		1323
984	SvREFCNT_dec (sv);	1324	SvREFCNT_dec (sv);
985	sv = 0;
986	}
987	}
988		1325
989	if (!sv)	1326	if (dec.err_sv)
		1327	sv_2mortal (dec.err_sv);
		1328
990	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1329	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
		1330	}
991		1331
992	sv = sv_2mortal (sv);	1332	sv = sv_2mortal (sv);
993		1333
994	return sv;	1334	return sv;
995	}	1335	}
996		1336
		1337	/////////////////////////////////////////////////////////////////////////////
		1338	// incremental parser
		1339
		1340	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1341
		1342	// returns 0 for notyet, 1 for success or error
		1343	static int
		1344	incr_parse (CBOR *self, SV *cborstr)
		1345	{
		1346	STRLEN cur;
		1347	SvPV (cborstr, cur);
		1348
		1349	while (ecb_expect_true (self->incr_need <= cur))
		1350	{
		1351	// table of integer count bytes
		1352	static I8 incr_len[MINOR_MASK + 1] = {
		1353	0, 0, 0, 0, 0, 0, 0, 0,
		1354	0, 0, 0, 0, 0, 0, 0, 0,
		1355	0, 0, 0, 0, 0, 0, 0, 0,
		1356	1, 2, 4, 8,-1,-1,-1,-2
		1357	};
		1358
		1359	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1360	U8 m = *p & MINOR_MASK;
		1361	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1362	I8 ilen = incr_len[m];
		1363
		1364	self->incr_need = self->incr_pos + 1;
		1365
		1366	if (ecb_expect_false (ilen < 0))
		1367	{
		1368	if (m != MINOR_INDEF)
		1369	return 1; // error
		1370
		1371	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1372	{
		1373	if (count >= 0)
		1374	return 1; // error
		1375
		1376	count = 1;
		1377	}
		1378	else
		1379	{
		1380	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1381	count = -1;
		1382	}
		1383	}
		1384	else
		1385	{
		1386	self->incr_need += ilen;
		1387	if (ecb_expect_false (self->incr_need > cur))
		1388	return 0;
		1389
		1390	int major = *p >> MAJOR_SHIFT;
		1391
		1392	switch (major)
		1393	{
		1394	case MAJOR_TAG >> MAJOR_SHIFT:
		1395	++count; // tags merely prefix another value
		1396	break;
		1397
		1398	case MAJOR_BYTES >> MAJOR_SHIFT:
		1399	case MAJOR_TEXT >> MAJOR_SHIFT:
		1400	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1401	case MAJOR_MAP >> MAJOR_SHIFT:
		1402	{
		1403	UV len;
		1404
		1405	if (ecb_expect_false (ilen))
		1406	{
		1407	len = 0;
		1408
		1409	do {
		1410	len = (len << 8) | *++p;
		1411	} while (--ilen);
		1412	}
		1413	else
		1414	len = m;
		1415
		1416	switch (major)
		1417	{
		1418	case MAJOR_BYTES >> MAJOR_SHIFT:
		1419	case MAJOR_TEXT >> MAJOR_SHIFT:
		1420	self->incr_need += len;
		1421	if (ecb_expect_false (self->incr_need > cur))
		1422	return 0;
		1423
		1424	break;
		1425
		1426	case MAJOR_MAP >> MAJOR_SHIFT:
		1427	len <<= 1;
		1428	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1429	if (len)
		1430	{
		1431	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1432	count = len + 1;
		1433	}
		1434	break;
		1435	}
		1436	}
		1437	}
		1438	}
		1439
		1440	self->incr_pos = self->incr_need;
		1441
		1442	if (count > 0)
		1443	{
		1444	while (!--count)
		1445	{
		1446	if (!AvFILLp (self->incr_count))
		1447	return 1; // done
		1448
		1449	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1450	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1451	}
		1452
		1453	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1454	}
		1455	}
		1456
		1457	return 0;
		1458	}
		1459
		1460
997	/////////////////////////////////////////////////////////////////////////////	1461	/////////////////////////////////////////////////////////////////////////////
998	// XS interface functions	1462	// XS interface functions
999		1463
1000	MODULE = CBOR::XS PACKAGE = CBOR::XS	1464	MODULE = CBOR::XS PACKAGE = CBOR::XS
1001		1465
1002	BOOT:	1466	BOOT:
1003	{	1467	{
1004	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1468	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1005	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1469	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1006		1470
1007	cbor_true = get_bool ("CBOR::XS::true");	1471	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1008	cbor_false = get_bool ("CBOR::XS::false");	1472	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1473
		1474	types_true = get_bool ("Types::Serialiser::true" );
		1475	types_false = get_bool ("Types::Serialiser::false");
		1476	types_error = get_bool ("Types::Serialiser::error");
		1477
		1478	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1479
		1480	sv_cbor = newSVpv ("CBOR", 0);
		1481	SvREADONLY_on (sv_cbor);
		1482
		1483	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
1009	}	1484	}
1010		1485
1011	PROTOTYPES: DISABLE	1486	PROTOTYPES: DISABLE
1012		1487
1013	void CLONE (...)	1488	void CLONE (...)
1014	CODE:	1489	CODE:
1015	cbor_stash = 0;	1490	cbor_stash = 0;
		1491	cbor_tagged_stash = 0;
		1492	types_error_stash = 0;
1016	cbor_boolean_stash = 0;	1493	types_boolean_stash = 0;
1017		1494
1018	void new (char *klass)	1495	void new (char *klass)
1019	PPCODE:	1496	PPCODE:
1020	{	1497	{
1021	SV *pv = NEWSV (0, sizeof (CBOR));	1498	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1029		1506
1030	void shrink (CBOR *self, int enable = 1)	1507	void shrink (CBOR *self, int enable = 1)
1031	ALIAS:	1508	ALIAS:
1032	shrink = F_SHRINK	1509	shrink = F_SHRINK
1033	allow_unknown = F_ALLOW_UNKNOWN	1510	allow_unknown = F_ALLOW_UNKNOWN
		1511	allow_sharing = F_ALLOW_SHARING
		1512	allow_cycles = F_ALLOW_CYCLES
		1513	forbid_objects = F_FORBID_OBJECTS
		1514	pack_strings = F_PACK_STRINGS
		1515	text_keys = F_TEXT_KEYS
		1516	text_strings = F_TEXT_STRINGS
		1517	validate_utf8 = F_VALIDATE_UTF8
1034	PPCODE:	1518	PPCODE:
1035	{	1519	{
1036	if (enable)	1520	if (enable)
1037	self->flags |= ix;	1521	self->flags |= ix;
1038	else	1522	else
…		…
1043		1527
1044	void get_shrink (CBOR *self)	1528	void get_shrink (CBOR *self)
1045	ALIAS:	1529	ALIAS:
1046	get_shrink = F_SHRINK	1530	get_shrink = F_SHRINK
1047	get_allow_unknown = F_ALLOW_UNKNOWN	1531	get_allow_unknown = F_ALLOW_UNKNOWN
		1532	get_allow_sharing = F_ALLOW_SHARING
		1533	get_allow_cycles = F_ALLOW_CYCLES
		1534	get_forbid_objects = F_FORBID_OBJECTS
		1535	get_pack_strings = F_PACK_STRINGS
		1536	get_text_keys = F_TEXT_KEYS
		1537	get_text_strings = F_TEXT_STRINGS
		1538	get_validate_utf8 = F_VALIDATE_UTF8
1048	PPCODE:	1539	PPCODE:
1049	XPUSHs (boolSV (self->flags & ix));	1540	XPUSHs (boolSV (self->flags & ix));
1050		1541
1051	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1542	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1052	PPCODE:	1543	PPCODE:
…		…
1068	CODE:	1559	CODE:
1069	RETVAL = self->max_size;	1560	RETVAL = self->max_size;
1070	OUTPUT:	1561	OUTPUT:
1071	RETVAL	1562	RETVAL
1072		1563
1073	#if 0 //TODO	1564	void filter (CBOR *self, SV *filter = 0)
1074
1075	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1076	PPCODE:	1565	PPCODE:
1077	{
1078	SvREFCNT_dec (self->cb_object);	1566	SvREFCNT_dec (self->filter);
1079	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1567	self->filter = filter ? newSVsv (filter) : filter;
1080
1081	XPUSHs (ST (0));	1568	XPUSHs (ST (0));
1082	}
1083		1569
1084	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1570	SV *get_filter (CBOR *self)
1085	PPCODE:	1571	CODE:
1086	{	1572	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1087	if (!self->cb_sk_object)	1573	OUTPUT:
1088	self->cb_sk_object = newHV ();	1574	RETVAL
1089
1090	if (SvOK (cb))
1091	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1092	else
1093	{
1094	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1095
1096	if (!HvKEYS (self->cb_sk_object))
1097	{
1098	SvREFCNT_dec (self->cb_sk_object);
1099	self->cb_sk_object = 0;
1100	}
1101	}
1102
1103	XPUSHs (ST (0));
1104	}
1105
1106	#endif
1107		1575
1108	void encode (CBOR *self, SV *scalar)	1576	void encode (CBOR *self, SV *scalar)
1109	PPCODE:	1577	PPCODE:
1110	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1578	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1111	XPUSHs (scalar);	1579	XPUSHs (scalar);
…		…
1124	EXTEND (SP, 2);	1592	EXTEND (SP, 2);
1125	PUSHs (sv);	1593	PUSHs (sv);
1126	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1594	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1127	}	1595	}
1128		1596
		1597	void incr_parse (CBOR *self, SV *cborstr)
		1598	ALIAS:
		1599	incr_parse_multiple = 1
		1600	PPCODE:
		1601	{
		1602	if (SvUTF8 (cborstr))
		1603	sv_utf8_downgrade (cborstr, 0);
		1604
		1605	if (!self->incr_count)
		1606	{
		1607	self->incr_count = newAV ();
		1608	self->incr_pos = 0;
		1609	self->incr_need = 1;
		1610
		1611	av_push (self->incr_count, newSViv (1));
		1612	}
		1613
		1614	do
		1615	{
		1616	if (!incr_parse (self, cborstr))
		1617	{
		1618	if (self->incr_need > self->max_size && self->max_size)
		1619	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1620	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1621
		1622	break;
		1623	}
		1624
		1625	SV *sv;
		1626	char *offset;
		1627
		1628	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1629	XPUSHs (sv);
		1630
		1631	sv_chop (cborstr, offset);
		1632
		1633	av_clear (self->incr_count);
		1634	av_push (self->incr_count, newSViv (1));
		1635
		1636	self->incr_pos = 0;
		1637	self->incr_need = self->incr_pos + 1;
		1638	}
		1639	while (ix);
		1640	}
		1641
		1642	void incr_reset (CBOR *self)
		1643	CODE:
		1644	{
		1645	SvREFCNT_dec (self->incr_count);
		1646	self->incr_count = 0;
		1647	}
		1648
1129	void DESTROY (CBOR *self)	1649	void DESTROY (CBOR *self)
1130	CODE:	1650	PPCODE:
1131	SvREFCNT_dec (self->cb_sk_object);	1651	cbor_free (self);
1132	SvREFCNT_dec (self->cb_object);
1133		1652
1134	PROTOTYPES: ENABLE	1653	PROTOTYPES: ENABLE
1135		1654
1136	void encode_cbor (SV *scalar)	1655	void encode_cbor (SV *scalar)
		1656	ALIAS:
		1657	encode_cbor = 0
		1658	encode_cbor_sharing = F_ALLOW_SHARING
1137	PPCODE:	1659	PPCODE:
1138	{	1660	{
1139	CBOR cbor;	1661	CBOR cbor;
1140	cbor_init (&cbor);	1662	cbor_init (&cbor);
		1663	cbor.flags |= ix;
1141	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1664	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1142	XPUSHs (scalar);	1665	XPUSHs (scalar);
1143	}	1666	}
1144		1667
1145	void decode_cbor (SV *cborstr)	1668	void decode_cbor (SV *cborstr)

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