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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.3 by root, Sat Oct 26 11:08:34 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
		16	// compatibility with perl <5.18
		17	#ifndef HvNAMELEN_get
		18	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		19	#endif
		20	#ifndef HvNAMELEN
		21	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		22	#endif
		23	#ifndef HvNAMEUTF8
		24	# define HvNAMEUTF8(hv) 0
		25	#endif
		26	#ifndef SvREFCNT_dec_NN
		27	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		28	#endif
		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
14	#define F_SHRINK 0x00000200UL	101	#define F_SHRINK 0x00000001UL
15	#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
16		110
17	#define INIT_SIZE 32 // initial scalar size to be allocated	111	#define INIT_SIZE 32 // initial scalar size to be allocated
18		112
19	#define SB do {	113	#define SB do {
20	#define SE } while (0)	114	#define SE } while (0)
21
22	#if __GNUC__ >= 3
23	# define expect(expr,value) __builtin_expect ((expr), (value))
24	# define INLINE static inline
25	#else
26	# define expect(expr,value) (expr)
27	# define INLINE static
28	#endif
29
30	#define expect_false(expr) expect ((expr) != 0, 0)
31	#define expect_true(expr) expect ((expr) != 0, 1)
32		115
33	#define IN_RANGE_INC(type,val,beg,end) \	116	#define IN_RANGE_INC(type,val,beg,end) \
34	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \	117	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
35	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))	118	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
36		119
…		…
42	#else	125	#else
43	# define CBOR_SLOW 0	126	# define CBOR_SLOW 0
44	# define CBOR_STASH cbor_stash	127	# define CBOR_STASH cbor_stash
45	#endif	128	#endif
46		129
47	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::
48	static SV *cbor_true, *cbor_false;	131	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
49		132
50	typedef struct {	133	typedef struct {
51	U32 flags;	134	U32 flags;
52	U32 max_depth;	135	U32 max_depth;
53	STRLEN max_size;	136	STRLEN max_size;
		137	SV *filter;
54		138
55	SV *cb_object;	139	// for the incremental parser
56	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.
57	} CBOR;	143	} CBOR;
58		144
59	INLINE void	145	ecb_inline void
60	cbor_init (CBOR *cbor)	146	cbor_init (CBOR *cbor)
61	{	147	{
62	Zero (cbor, 1, CBOR);	148	Zero (cbor, 1, CBOR);
63	cbor->max_depth = 512;	149	cbor->max_depth = 512;
64	}	150	}
65		151
		152	ecb_inline void
		153	cbor_free (CBOR *cbor)
		154	{
		155	SvREFCNT_dec (cbor->filter);
		156	SvREFCNT_dec (cbor->incr_count);
		157	}
		158
66	/////////////////////////////////////////////////////////////////////////////	159	/////////////////////////////////////////////////////////////////////////////
67	// utility functions	160	// utility functions
68		161
69	INLINE SV *	162	ecb_inline SV *
70	get_bool (const char *name)	163	get_bool (const char *name)
71	{	164	{
72	SV *sv = get_sv (name, 1);	165	SV *sv = get_sv (name, 1);
73		166
74	SvREADONLY_on (sv);	167	SvREADONLY_on (sv);
75	SvREADONLY_on (SvRV (sv));	168	SvREADONLY_on (SvRV (sv));
76		169
77	return sv;	170	return sv;
78	}	171	}
79		172
80	INLINE void	173	ecb_inline void
81	shrink (SV *sv)	174	shrink (SV *sv)
82	{	175	{
83	sv_utf8_downgrade (sv, 1);	176	sv_utf8_downgrade (sv, 1);
84		177
85	if (SvLEN (sv) > SvCUR (sv) + 1)	178	if (SvLEN (sv) > SvCUR (sv) + 1)
…		…
90	SvPV_renew (sv, SvCUR (sv) + 1);	183	SvPV_renew (sv, SvCUR (sv) + 1);
91	#endif	184	#endif
92	}	185	}
93	}	186	}
94		187
95	/////////////////////////////////////////////////////////////////////////////	188	// minimum length of a string to be registered for stringref
96	// fp hell	189	ecb_inline int
		190	minimum_string_length (UV idx)
		191	{
97		192
98	//TODO	193	return idx <= 23 ? 3
		194	: idx <= 0xffU ? 4
		195	: idx <= 0xffffU ? 5
		196	: idx <= 0xffffffffU ? 7
		197	: 11;
		198	}
99		199
100	/////////////////////////////////////////////////////////////////////////////	200	/////////////////////////////////////////////////////////////////////////////
101	// encoder	201	// encoder
102		202
103	// structure used for encoding CBOR	203	// structure used for encoding CBOR
…		…
106	char *cur; // SvPVX (sv) + current output position	206	char *cur; // SvPVX (sv) + current output position
107	char *end; // SvEND (sv)	207	char *end; // SvEND (sv)
108	SV *sv; // result scalar	208	SV *sv; // result scalar
109	CBOR cbor;	209	CBOR cbor;
110	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;
111	} enc_t;	215	} enc_t;
112		216
113	INLINE void	217	ecb_inline void
114	need (enc_t *enc, STRLEN len)	218	need (enc_t *enc, STRLEN len)
115	{	219	{
116	if (expect_false (enc->cur + len >= enc->end))	220	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
117	{	221	{
118	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	222	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
119	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	223	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
120	enc->cur = SvPVX (enc->sv) + cur;	224	enc->cur = SvPVX (enc->sv) + cur;
121	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	225	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
122	}	226	}
123	}	227	}
124		228
125	INLINE void	229	ecb_inline void
126	encode_ch (enc_t *enc, char ch)	230	encode_ch (enc_t *enc, char ch)
127	{	231	{
128	need (enc, 1);	232	need (enc, 1);
129	*enc->cur++ = ch;	233	*enc->cur++ = ch;
130	}	234	}
…		…
132	static void	236	static void
133	encode_uint (enc_t *enc, int major, UV len)	237	encode_uint (enc_t *enc, int major, UV len)
134	{	238	{
135	need (enc, 9);	239	need (enc, 9);
136		240
137	if (len < 24)	241	if (ecb_expect_true (len < LENGTH_EXT1))
138	*enc->cur++ = major | len;	242	*enc->cur++ = major | len;
139	else if (len < 0x100)	243	else if (ecb_expect_true (len <= 0xffU))
140	{	244	{
141	*enc->cur++ = major | 24;	245	*enc->cur++ = major | LENGTH_EXT1;
142	*enc->cur++ = len;	246	*enc->cur++ = len;
143	}	247	}
144	else if (len < 0x10000)	248	else if (len <= 0xffffU)
145	{	249	{
146	*enc->cur++ = major | 25;	250	*enc->cur++ = major | LENGTH_EXT2;
147	*enc->cur++ = len >> 8;	251	*enc->cur++ = len >> 8;
148	*enc->cur++ = len;	252	*enc->cur++ = len;
149	}	253	}
150	else if (len < 0x100000000)	254	else if (len <= 0xffffffffU)
151	{	255	{
152	*enc->cur++ = major | 26;	256	*enc->cur++ = major | LENGTH_EXT4;
153	*enc->cur++ = len >> 24;	257	*enc->cur++ = len >> 24;
154	*enc->cur++ = len >> 16;	258	*enc->cur++ = len >> 16;
155	*enc->cur++ = len >> 8;	259	*enc->cur++ = len >> 8;
156	*enc->cur++ = len;	260	*enc->cur++ = len;
157	}	261	}
158	else if (len)	262	else
159	{	263	{
160	*enc->cur++ = major | 27;	264	*enc->cur++ = major | LENGTH_EXT8;
161	*enc->cur++ = len >> 56;	265	*enc->cur++ = len >> 56;
162	*enc->cur++ = len >> 48;	266	*enc->cur++ = len >> 48;
163	*enc->cur++ = len >> 40;	267	*enc->cur++ = len >> 40;
164	*enc->cur++ = len >> 32;	268	*enc->cur++ = len >> 32;
165	*enc->cur++ = len >> 24;	269	*enc->cur++ = len >> 24;
…		…
167	*enc->cur++ = len >> 8;	271	*enc->cur++ = len >> 8;
168	*enc->cur++ = len;	272	*enc->cur++ = len;
169	}	273	}
170	}	274	}
171		275
172	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
173	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	284	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
174	{	285	{
175	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);
176	need (enc, len);	316	need (enc, len);
177	memcpy (enc->cur, str, len);	317	memcpy (enc->cur, str, len);
178	enc->cur += len;	318	enc->cur += len;
179	}	319	}
180		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
181	static void encode_sv (enc_t *enc, SV *sv);	346	static void encode_sv (enc_t *enc, SV *sv);
182		347
183	static void	348	static void
184	encode_av (enc_t *enc, AV *av)	349	encode_av (enc_t *enc, AV *av)
185	{	350	{
…		…
188	if (enc->depth >= enc->cbor.max_depth)	353	if (enc->depth >= enc->cbor.max_depth)
189	croak (ERR_NESTING_EXCEEDED);	354	croak (ERR_NESTING_EXCEEDED);
190		355
191	++enc->depth;	356	++enc->depth;
192		357
193	encode_uint (enc, 0x80, len + 1);	358	encode_uint (enc, MAJOR_ARRAY, len + 1);
194		359
		360	if (SvMAGICAL (av))
195	for (i = 0; i <= len; ++i)	361	for (i = 0; i <= len; ++i)
196	{	362	{
197	SV **svp = av_fetch (av, i, 0);	363	SV **svp = av_fetch (av, i, 0);
198	encode_sv (enc, svp ? *svp : &PL_sv_undef);	364	encode_sv (enc, svp ? *svp : &PL_sv_undef);
199	}	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	}
200		372
201	--enc->depth;	373	--enc->depth;
202	}	374	}
203		375
204	static void	376	static void
…		…
213		385
214	int pairs = hv_iterinit (hv);	386	int pairs = hv_iterinit (hv);
215	int mg = SvMAGICAL (hv);	387	int mg = SvMAGICAL (hv);
216		388
217	if (mg)	389	if (mg)
218	encode_ch (enc, 0xa0 | 31);	390	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
219	else	391	else
220	encode_uint (enc, 0xa0, pairs);	392	encode_uint (enc, MAJOR_MAP, pairs);
221		393
222	while ((he = hv_iternext (hv)))	394	while ((he = hv_iternext (hv)))
223	{	395	{
224	if (HeKLEN (he) == HEf_SVKEY)	396	if (HeKLEN (he) == HEf_SVKEY)
225	encode_sv (enc, HeSVKEY (he));	397	encode_sv (enc, HeSVKEY (he));
226	else	398	else
227	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));
228		400
229	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));
230	}	402	}
231		403
232	if (mg)	404	if (mg)
233	encode_ch (enc, 0xe0 | 31);	405	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
234		406
235	--enc->depth;	407	--enc->depth;
236	}	408	}
237		409
238	// encode objects, arrays and special \0=false and \1=true values.	410	// encode objects, arrays and special \0=false and \1=true values.
239	static void	411	static void
240	encode_rv (enc_t *enc, SV *sv)	412	encode_rv (enc_t *enc, SV *sv)
241	{	413	{
242	svtype svt;
243
244	SvGETMAGIC (sv);	414	SvGETMAGIC (sv);
		415
245	svt = SvTYPE (sv);	416	svtype svt = SvTYPE (sv);
246		417
247	if (expect_false (SvOBJECT (sv)))	418	if (ecb_expect_false (SvOBJECT (sv)))
248	{	419	{
249	HV *stash = !CBOR_SLOW || cbor_boolean_stash	420	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
250	? 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
251	: gv_stashpv ("CBOR::XS::Boolean", 1);	428	: gv_stashpv ("CBOR::XS::Tagged" , 1);
252		429
253	if (SvSTASH (sv) == stash)	430	HV *stash = SvSTASH (sv);
254	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	}
255	else	468	else
256	{	469	{
257	#if 0 //TODO	470	sv_setuv (*svp, enc->shareable_idx);
258	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)))
259	{	485	{
		486	dSP;
		487
		488	ENTER; SAVETMPS;
		489	PUSHMARK (SP);
260	// 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
261	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
262
263	if (to_cbor)
264	{
265	dSP;
266
267	ENTER; SAVETMPS; PUSHMARK (SP);
268	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	491	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
269		492
270	// calling with G_SCALAR ensures that we always get a 1 return value
271	PUTBACK;	493	PUTBACK;
		494	// G_SCALAR ensures that return value is 1
272	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	495	call_sv ((SV *)GvCV (method), G_SCALAR);
273	SPAGAIN;	496	SPAGAIN;
274		497
275	// catch this surprisingly common error	498	// catch this surprisingly common error
276	if (SvROK (TOPs) && SvRV (TOPs) == sv)	499	if (SvROK (TOPs) && SvRV (TOPs) == sv)
277	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	500	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
278		501
279	sv = POPs;
280	PUTBACK;
281
282	encode_sv (enc, sv);	502	encode_sv (enc, POPs);
283		503
		504	PUTBACK;
		505
284	FREETMPS; LEAVE;	506	FREETMPS; LEAVE;
285	}
286	else if (enc->cbor.flags & F_ALLOW_BLESSED)
287	encode_str (enc, "null", 4, 0);
288	else
289	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it",
290	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
291	}	507	}
292	else if (enc->cbor.flags & F_ALLOW_BLESSED)	508	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
293	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	}
294	else	539	else
295	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",
296	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	541	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
297	#endif
298	}
299	}	542	}
300	else if (svt == SVt_PVHV)	543	else if (svt == SVt_PVHV)
301	encode_hv (enc, (HV *)sv);	544	encode_hv (enc, (HV *)sv);
302	else if (svt == SVt_PVAV)	545	else if (svt == SVt_PVAV)
303	encode_av (enc, (AV *)sv);	546	encode_av (enc, (AV *)sv);
304	else if (svt < SVt_PVAV)
305	{
306	STRLEN len = 0;
307	char *pv = svt ? SvPV (sv, len) : 0;
308
309	if (len == 1 && *pv == '1')
310	encode_ch (enc, 0xe0 | 21);
311	else if (len == 1 && *pv == '0')
312	encode_ch (enc, 0xe0 | 20);
313	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
314	encode_ch (enc, 0xe0 | 23);
315	else
316	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
317	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
318	}
319	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
320	encode_ch (enc, 0xe0 | 23);
321	else	547	else
322	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	548	{
323	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	549	encode_tag (enc, CBOR_TAG_INDIRECTION);
		550	encode_sv (enc, sv);
		551	}
324	}	552	}
325		553
326	static void	554	static void
327	encode_nv (enc_t *enc, SV *sv)	555	encode_nv (enc_t *enc, SV *sv)
328	{	556	{
329	double nv = SvNVX (sv);	557	double nv = SvNVX (sv);
330		558
331	need (enc, 9);	559	need (enc, 9);
332		560
333	if (expect_false (nv == (U32)nv))	561	if (ecb_expect_false (nv == (NV)(U32)nv))
334	encode_uint (enc, 0x00, (U32)nv);	562	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
335	//TODO: maybe I32?	563	//TODO: maybe I32?
336	else if (expect_false (nv == (float)nv))	564	else if (ecb_expect_false (nv == (float)nv))
337	{	565	{
338	uint32_t fp = ecb_float_to_binary32 (nv);	566	uint32_t fp = ecb_float_to_binary32 (nv);
339		567
340	*enc->cur++ = 0xe0 | 26;	568	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
341		569
342	if (!ecb_big_endian ())	570	if (!ecb_big_endian ())
343	fp = ecb_bswap32 (fp);	571	fp = ecb_bswap32 (fp);
344		572
345	memcpy (enc->cur, &fp, 4);	573	memcpy (enc->cur, &fp, 4);
…		…
347	}	575	}
348	else	576	else
349	{	577	{
350	uint64_t fp = ecb_double_to_binary64 (nv);	578	uint64_t fp = ecb_double_to_binary64 (nv);
351		579
352	*enc->cur++ = 0xe0 | 27;	580	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
353		581
354	if (!ecb_big_endian ())	582	if (!ecb_big_endian ())
355	fp = ecb_bswap64 (fp);	583	fp = ecb_bswap64 (fp);
356		584
357	memcpy (enc->cur, &fp, 8);	585	memcpy (enc->cur, &fp, 8);
…		…
366		594
367	if (SvPOKp (sv))	595	if (SvPOKp (sv))
368	{	596	{
369	STRLEN len;	597	STRLEN len;
370	char *str = SvPV (sv, len);	598	char *str = SvPV (sv, len);
371	encode_str (enc, SvUTF8 (sv), str, len);	599	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
372	}	600	}
373	else if (SvNOKp (sv))	601	else if (SvNOKp (sv))
374	encode_nv (enc, sv);	602	encode_nv (enc, sv);
375	else if (SvIOKp (sv))	603	else if (SvIOKp (sv))
376	{	604	{
377	if (SvIsUV (sv))	605	if (SvIsUV (sv))
378	encode_uint (enc, 0x00, SvUVX (sv));	606	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
379	else if (SvIVX (sv) >= 0)	607	else if (SvIVX (sv) >= 0)
380	encode_uint (enc, 0x00, SvIVX (sv));	608	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
381	else	609	else
382	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	610	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
383	}	611	}
384	else if (SvROK (sv))	612	else if (SvROK (sv))
385	encode_rv (enc, SvRV (sv));	613	encode_rv (enc, SvRV (sv));
386	else if (!SvOK (sv))	614	else if (!SvOK (sv))
387	encode_ch (enc, 0xe0 | 22);	615	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
388	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	616	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
389	encode_ch (enc, 0xe0 | 23);	617	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
390	else	618	else
391	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",
392	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	620	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
393	}	621	}
394		622
395	static SV *	623	static SV *
396	encode_cbor (SV *scalar, CBOR *cbor)	624	encode_cbor (SV *scalar, CBOR *cbor)
397	{	625	{
398	enc_t enc;	626	enc_t enc = { 0 };
399		627
400	enc.cbor = *cbor;	628	enc.cbor = *cbor;
401	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	629	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
402	enc.cur = SvPVX (enc.sv);	630	enc.cur = SvPVX (enc.sv);
403	enc.end = SvEND (enc.sv);	631	enc.end = SvEND (enc.sv);
404	enc.depth = 0;
405		632
406	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
407	encode_sv (&enc, scalar);	642	encode_sv (&enc, scalar);
408		643
409	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	644	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
410	*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
411		646
…		…
425	U8 *end; // end of input string	660	U8 *end; // end of input string
426	const char *err; // parse error, if != 0	661	const char *err; // parse error, if != 0
427	CBOR cbor;	662	CBOR cbor;
428	U32 depth; // recursion depth	663	U32 depth; // recursion depth
429	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
430	} dec_t;	669	} dec_t;
431		670
432	#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);
433		678
434	#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;
435		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
436	#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)
437	#define DEC_DEC_DEPTH --dec->depth	714	#define DEC_DEC_DEPTH --dec->depth
438		715
439	static UV	716	static UV
440	decode_uint (dec_t *dec)	717	decode_uint (dec_t *dec)
441	{	718	{
442	switch (*dec->cur & 31)	719	U8 m = *dec->cur & MINOR_MASK;
443	{	720	++dec->cur;
444	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
445	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
446	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
447	return *dec->cur++ & 31;
448		721
449	case 24:	722	if (ecb_expect_true (m < LENGTH_EXT1))
		723	return m;
		724	else if (ecb_expect_true (m == LENGTH_EXT1))
		725	{
450	WANT (2);	726	WANT (1);
451	dec->cur += 2;	727	dec->cur += 1;
452	return dec->cur[-1];	728	return dec->cur[-1];
453		729	}
454	case 25:	730	else if (ecb_expect_true (m == LENGTH_EXT2))
		731	{
455	WANT (3);	732	WANT (2);
456	dec->cur += 3;	733	dec->cur += 2;
457	return (((UV)dec->cur[-2]) << 8)	734	return (((UV)dec->cur[-2]) << 8)
458	| ((UV)dec->cur[-1]);	735	| ((UV)dec->cur[-1]);
459		736	}
460	case 26:	737	else if (ecb_expect_true (m == LENGTH_EXT4))
		738	{
461	WANT (5);	739	WANT (4);
462	dec->cur += 5;	740	dec->cur += 4;
463	return (((UV)dec->cur[-4]) << 24)	741	return (((UV)dec->cur[-4]) << 24)
464	| (((UV)dec->cur[-3]) << 16)	742	| (((UV)dec->cur[-3]) << 16)
465	| (((UV)dec->cur[-2]) << 8)	743	| (((UV)dec->cur[-2]) << 8)
466	| ((UV)dec->cur[-1]);	744	| ((UV)dec->cur[-1]);
467		745	}
468	case 27:	746	else if (ecb_expect_true (m == LENGTH_EXT8))
		747	{
469	WANT (9);	748	WANT (8);
470	dec->cur += 9;	749	dec->cur += 8;
		750
		751	return
		752	#if UVSIZE < 8
		753	0
		754	#else
471	return (((UV)dec->cur[-8]) << 56)	755	(((UV)dec->cur[-8]) << 56)
472	| (((UV)dec->cur[-7]) << 48)	756	| (((UV)dec->cur[-7]) << 48)
473	| (((UV)dec->cur[-6]) << 40)	757	| (((UV)dec->cur[-6]) << 40)
474	| (((UV)dec->cur[-5]) << 32)	758	| (((UV)dec->cur[-5]) << 32)
		759	#endif
475	| (((UV)dec->cur[-4]) << 24)	760	| (((UV)dec->cur[-4]) << 24)
476	| (((UV)dec->cur[-3]) << 16)	761	| (((UV)dec->cur[-3]) << 16)
477	| (((UV)dec->cur[-2]) << 8)	762	| (((UV)dec->cur[-2]) << 8)
478	| ((UV)dec->cur[-1]);	763	| ((UV)dec->cur[-1]);
479		764	}
480	default:	765	else
481	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	766	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
482	}
483		767
484	fail:	768	fail:
485	return 0;	769	return 0;
486	}	770	}
487		771
…		…
492	{	776	{
493	AV *av = newAV ();	777	AV *av = newAV ();
494		778
495	DEC_INC_DEPTH;	779	DEC_INC_DEPTH;
496		780
497	if ((*dec->cur & 31) == 31)	781	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
498	{	782	{
499	++dec->cur;	783	++dec->cur;
500		784
501	for (;;)	785	for (;;)
502	{	786	{
503	WANT (1);	787	WANT (1);
504		788
505	if (*dec->cur == (0xe0 | 31))	789	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
506	{	790	{
507	++dec->cur;	791	++dec->cur;
508	break;	792	break;
509	}	793	}
510		794
511	av_push (av, decode_sv (dec));	795	av_push (av, decode_sv (dec));
512	}	796	}
513	}	797	}
514	else	798	else
515	{	799	{
516	int i, len = decode_uint (dec);	800	UV i, len = decode_uint (dec);
517		801
		802	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
518	av_fill (av, len - 1);	803	av_fill (av, len - 1);
519		804
520	for (i = 0; i < len; ++i)	805	for (i = 0; i < len; ++i)
521	AvARRAY (av)[i] = decode_sv (dec);	806	AvARRAY (av)[i] = decode_sv (dec);
522	}	807	}
…		…
528	SvREFCNT_dec (av);	813	SvREFCNT_dec (av);
529	DEC_DEC_DEPTH;	814	DEC_DEC_DEPTH;
530	return &PL_sv_undef;	815	return &PL_sv_undef;
531	}	816	}
532		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
533	static SV *	892	static SV *
534	decode_hv (dec_t *dec)	893	decode_hv (dec_t *dec)
535	{	894	{
536	HV *hv = newHV ();	895	HV *hv = newHV ();
537		896
538	DEC_INC_DEPTH;	897	DEC_INC_DEPTH;
539		898
540	if ((*dec->cur & 31) == 31)	899	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
541	{	900	{
542	++dec->cur;	901	++dec->cur;
543		902
544	for (;;)	903	for (;;)
545	{	904	{
546	WANT (1);	905	WANT (1);
547		906
548	if (*dec->cur == (0xe0 | 31))	907	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
549	{	908	{
550	++dec->cur;	909	++dec->cur;
551	break;	910	break;
552	}	911	}
553		912
554	SV *k = decode_sv (dec);	913	decode_he (dec, hv);
555	SV *v = decode_sv (dec);
556
557	hv_store_ent (hv, k, v, 0);
558	}	914	}
559	}	915	}
560	else	916	else
561	{	917	{
562	int len = decode_uint (dec);	918	UV pairs = decode_uint (dec);
563		919
		920	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		921
564	while (len--)	922	while (pairs--)
565	{	923	decode_he (dec, hv);
566	SV *k = decode_sv (dec);
567	SV *v = decode_sv (dec);
568
569	hv_store_ent (hv, k, v, 0);
570	}
571	}	924	}
572		925
573	DEC_DEC_DEPTH;	926	DEC_DEC_DEPTH;
574	return newRV_noinc ((SV *)hv);	927	return newRV_noinc ((SV *)hv);
575
576	#if 0
577	SV *sv;
578	HV *hv = newHV ();
579
580	DEC_INC_DEPTH;
581	decode_ws (dec);
582
583	for (;;)
584	{
585	// heuristic: assume that
586	// a) decode_str + hv_store_ent are abysmally slow.
587	// b) most hash keys are short, simple ascii text.
588	// => try to "fast-match" such strings to avoid
589	// the overhead of decode_str + hv_store_ent.
590	{
591	SV *value;
592	char *p = dec->cur;
593	char *e = p + 24; // only try up to 24 bytes
594
595	for (;;)
596	{
597	// the >= 0x80 is false on most architectures
598	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
599	{
600	// slow path, back up and use decode_str
601	SV *key = decode_str (dec);
602	if (!key)
603	goto fail;
604
605	decode_ws (dec); EXPECT_CH (':');
606
607	decode_ws (dec);
608	value = decode_sv (dec);
609	if (!value)
610	{
611	SvREFCNT_dec (key);
612	goto fail;
613	}
614
615	hv_store_ent (hv, key, value, 0);
616	SvREFCNT_dec (key);
617
618	break;
619	}
620	else if (*p == '"')
621	{
622	// fast path, got a simple key
623	char *key = dec->cur;
624	int len = p - key;
625	dec->cur = p + 1;
626
627	decode_ws (dec); EXPECT_CH (':');
628
629	decode_ws (dec);
630	value = decode_sv (dec);
631	if (!value)
632	goto fail;
633
634	hv_store (hv, key, len, value, 0);
635
636	break;
637	}
638
639	++p;
640	}
641	}
642
643	decode_ws (dec);
644
645	if (*dec->cur == '}')
646	{
647	++dec->cur;
648	break;
649	}
650
651	if (*dec->cur != ',')
652	ERR (", or } expected while parsing object/hash");
653
654	++dec->cur;
655
656	decode_ws (dec);
657
658	if (*dec->cur == '}' && dec->cbor.flags & F_RELAXED)
659	{
660	++dec->cur;
661	break;
662	}
663	}
664
665	DEC_DEC_DEPTH;
666	sv = newRV_noinc ((SV *)hv);
667
668	// check filter callbacks
669	if (dec->cbor.flags & F_HOOK)
670	{
671	if (dec->cbor.cb_sk_object && HvKEYS (hv) == 1)
672	{
673	HE *cb, *he;
674
675	hv_iterinit (hv);
676	he = hv_iternext (hv);
677	hv_iterinit (hv);
678
679	// the next line creates a mortal sv each time its called.
680	// might want to optimise this for common cases.
681	cb = hv_fetch_ent (dec->cbor.cb_sk_object, hv_iterkeysv (he), 0, 0);
682
683	if (cb)
684	{
685	dSP;
686	int count;
687
688	ENTER; SAVETMPS; PUSHMARK (SP);
689	XPUSHs (HeVAL (he));
690	sv_2mortal (sv);
691
692	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
693
694	if (count == 1)
695	{
696	sv = newSVsv (POPs);
697	FREETMPS; LEAVE;
698	return sv;
699	}
700
701	SvREFCNT_inc (sv);
702	FREETMPS; LEAVE;
703	}
704	}
705
706	if (dec->cbor.cb_object)
707	{
708	dSP;
709	int count;
710
711	ENTER; SAVETMPS; PUSHMARK (SP);
712	XPUSHs (sv_2mortal (sv));
713
714	PUTBACK; count = call_sv (dec->cbor.cb_object, G_ARRAY); SPAGAIN;
715
716	if (count == 1)
717	{
718	sv = newSVsv (POPs);
719	FREETMPS; LEAVE;
720	return sv;
721	}
722
723	SvREFCNT_inc (sv);
724	FREETMPS; LEAVE;
725	}
726	}
727
728	return sv;
729	#endif
730		928
731	fail:	929	fail:
732	SvREFCNT_dec (hv);	930	SvREFCNT_dec (hv);
733	DEC_DEC_DEPTH;	931	DEC_DEC_DEPTH;
734	return &PL_sv_undef;	932	return &PL_sv_undef;
735	}	933	}
736		934
737	static SV *	935	static SV *
738	decode_str (dec_t *dec, int utf8)	936	decode_str (dec_t *dec, int utf8)
739	{	937	{
740	SV *sv;	938	SV *sv = 0;
741		939
742	if ((*dec->cur & 31) == 31)	940	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
743	{	941	{
		942	// indefinite length strings
744	++dec->cur;	943	++dec->cur;
745		944
		945	U8 major = *dec->cur & MAJOR_MISC;
		946
746	sv = newSVpvn ("", 0);	947	sv = newSVpvn ("", 0);
747		948
748	// not very fast, and certainly not robust against illegal input
749	for (;;)	949	for (;;)
750	{	950	{
751	WANT (1);	951	WANT (1);
752		952
753	if (*dec->cur == (0xe0 | 31))	953	if ((*dec->cur - major) > LENGTH_EXT8)
		954	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
754	{	955	{
755	++dec->cur;	956	++dec->cur;
756	break;	957	break;
757	}	958	}
		959	else
		960	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
758		961
759	SV *sv2 = decode_sv (dec);	962	STRLEN len = decode_uint (dec);
760	sv_catsv (sv, sv2);	963
		964	WANT (len);
		965	sv_catpvn (sv, dec->cur, len);
		966	dec->cur += len;
761	}	967	}
762	}	968	}
763	else	969	else
764	{	970	{
765	STRLEN len = decode_uint (dec);	971	STRLEN len = decode_uint (dec);
766		972
767	WANT (len);	973	WANT (len);
768	sv = newSVpvn (dec->cur, len);	974	sv = newSVpvn (dec->cur, len);
769	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));
770	}	980	}
771		981
772	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
773	SvUTF8_on (sv);	988	SvUTF8_on (sv);
		989	}
774		990
775	return sv;	991	return sv;
776		992
777	fail:	993	fail:
		994	SvREFCNT_dec (sv);
778	return &PL_sv_undef;	995	return &PL_sv_undef;
779	}	996	}
780		997
781	static SV *	998	static SV *
782	decode_tagged (dec_t *dec)	999	decode_tagged (dec_t *dec)
783	{	1000	{
		1001	SV *sv = 0;
784	UV tag = decode_uint (dec);	1002	UV tag = decode_uint (dec);
		1003
		1004	WANT (1);
		1005
		1006	switch (tag)
		1007	{
		1008	case CBOR_TAG_MAGIC:
785	SV *sv = decode_sv (dec);	1009	sv = decode_sv (dec);
		1010	break;
786		1011
787	if (tag == 55799) // 2.4.5 Self-Describe CBOR	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
788	return sv;	1192	return sv;
789		1193
790	AV *av = newAV ();	1194	fail:
791	av_push (av, newSVuv (tag));	1195	SvREFCNT_dec (sv);
792	av_push (av, sv);	1196	return &PL_sv_undef;
793	return newRV_noinc ((SV *)av);
794	}	1197	}
795		1198
796	static SV *	1199	static SV *
797	decode_sv (dec_t *dec)	1200	decode_sv (dec_t *dec)
798	{	1201	{
799	WANT (1);	1202	WANT (1);
800		1203
801	switch (*dec->cur >> 5)	1204	switch (*dec->cur >> MAJOR_SHIFT)
802	{	1205	{
803	case 0: // unsigned int	1206	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
804	//TODO: 64 bit values on 3 2bit perls	1207	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
805	return newSVuv (decode_uint (dec));	1208	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
806	case 1: // negative int	1209	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
807	return newSViv (-1 - (IV)decode_uint (dec));	1210	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
808	case 2: // octet string	1211	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
809	return decode_str (dec, 0);	1212	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
810	case 3: // utf-8 string	1213
811	return decode_str (dec, 1);	1214	case MAJOR_MISC >> MAJOR_SHIFT:
812	case 4: // array
813	return decode_av (dec);
814	case 5: // map
815	return decode_hv (dec);
816	case 6: // tag
817	return decode_tagged (dec);
818	case 7: // misc
819	switch (*dec->cur++ & 31)	1215	switch (*dec->cur++ & MINOR_MASK)
820	{	1216	{
821	case 20:	1217	case SIMPLE_FALSE:
822	#if CBOR_SLOW	1218	#if CBOR_SLOW
823	cbor_false = get_bool ("CBOR::XS::false");	1219	types_false = get_bool ("Types::Serialiser::false");
824	#endif	1220	#endif
825	return newSVsv (cbor_false);	1221	return newSVsv (types_false);
826	case 21:	1222	case SIMPLE_TRUE:
827	#if CBOR_SLOW	1223	#if CBOR_SLOW
828	cbor_true = get_bool ("CBOR::XS::true");	1224	types_true = get_bool ("Types::Serialiser::true");
829	#endif	1225	#endif
830	return newSVsv (cbor_true);	1226	return newSVsv (types_true);
831	case 22:	1227	case SIMPLE_NULL:
832	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);
833		1234
834	case 25:	1235	case MISC_FLOAT16:
835	{	1236	{
836	WANT (2);	1237	WANT (2);
837		1238
838	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1239	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
839	dec->cur += 2;	1240	dec->cur += 2;
840		1241
841	return newSVnv (ecb_binary16_to_float (fp));	1242	return newSVnv (ecb_binary16_to_float (fp));
842	}	1243	}
843		1244
844	case 26:	1245	case MISC_FLOAT32:
845	{	1246	{
846	uint32_t fp;	1247	uint32_t fp;
847	WANT (4);	1248	WANT (4);
848	memcpy (&fp, dec->cur, 4);	1249	memcpy (&fp, dec->cur, 4);
849	dec->cur += 4;	1250	dec->cur += 4;
…		…
852	fp = ecb_bswap32 (fp);	1253	fp = ecb_bswap32 (fp);
853		1254
854	return newSVnv (ecb_binary32_to_float (fp));	1255	return newSVnv (ecb_binary32_to_float (fp));
855	}	1256	}
856		1257
857	case 27:	1258	case MISC_FLOAT64:
858	{	1259	{
859	uint64_t fp;	1260	uint64_t fp;
860	WANT (8);	1261	WANT (8);
861	memcpy (&fp, dec->cur, 8);	1262	memcpy (&fp, dec->cur, 8);
862	dec->cur += 8;	1263	dec->cur += 8;
…		…
865	fp = ecb_bswap64 (fp);	1266	fp = ecb_bswap64 (fp);
866		1267
867	return newSVnv (ecb_binary64_to_double (fp));	1268	return newSVnv (ecb_binary64_to_double (fp));
868	}	1269	}
869		1270
870	// 0..19 unassigned	1271	// 0..19 unassigned simple
871	// 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
872	default:	1275	default:
873	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1276	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
874	}	1277	}
875		1278
876	break;	1279	break;
877	}	1280	}
878	#if 0
879	switch (*dec->cur)
880	{
881	//case '"': ++dec->cur; return decode_str (dec);
882	case '[': ++dec->cur; return decode_av (dec);
883	case '{': ++dec->cur; return decode_hv (dec);
884
885	case '-':
886	case '0': case '1': case '2': case '3': case '4':
887	case '5': case '6': case '7': case '8': case '9':
888	//TODO return decode_num (dec);
889
890	case 't':
891	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
892	{
893	dec->cur += 4;
894	#if CBOR_SLOW
895	cbor_true = get_bool ("CBOR::XS::true");
896	#endif
897	return newSVsv (cbor_true);
898	}
899	else
900	ERR ("'true' expected");
901
902	break;
903
904	case 'f':
905	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
906	{
907	dec->cur += 5;
908	#if CBOR_SLOW
909	cbor_false = get_bool ("CBOR::XS::false");
910	#endif
911	return newSVsv (cbor_false);
912	}
913	else
914	ERR ("'false' expected");
915
916	break;
917
918	case 'n':
919	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
920	{
921	dec->cur += 4;
922	return newSVsv (&PL_sv_undef);
923	}
924	else
925	ERR ("'null' expected");
926
927	break;
928
929	default:
930	ERR ("malformed CBOR string, neither array, object, number, string or atom");
931	break;
932	}
933	#endif
934		1281
935	fail:	1282	fail:
936	return &PL_sv_undef;	1283	return &PL_sv_undef;
937	}	1284	}
938		1285
939	static SV *	1286	static SV *
940	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1287	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
941	{	1288	{
942	dec_t dec;	1289	dec_t dec = { 0 };
943	SV *sv;	1290	SV *sv;
		1291	STRLEN len;
		1292	char *data = SvPVbyte (string, len);
944		1293
945	/* work around bugs in 5.10 where manipulating magic values
946	* makes perl ignore the magic in subsequent accesses.
947	* also make a copy of non-PV values, to get them into a clean
948	* state (SvPV should do that, but it's buggy, see below).
949	*/
950	/*SvGETMAGIC (string);*/
951	if (SvMAGICAL (string) || !SvPOK (string))
952	string = sv_2mortal (newSVsv (string));
953
954	SvUPGRADE (string, SVt_PV);
955
956	/* work around a bug in perl 5.10, which causes SvCUR to fail an
957	* assertion with -DDEBUGGING, although SvCUR is documented to
958	* return the xpv_cur field which certainly exists after upgrading.
959	* according to nicholas clark, calling SvPOK fixes this.
960	* But it doesn't fix it, so try another workaround, call SvPV_nolen
961	* and hope for the best.
962	* Damnit, SvPV_nolen still trips over yet another assertion. This
963	* assertion business is seriously broken, try yet another workaround
964	* for the broken -DDEBUGGING.
965	*/
966	{
967	#ifdef DEBUGGING
968	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
969	#else
970	STRLEN offset = SvCUR (string);
971	#endif
972
973	if (offset > cbor->max_size && cbor->max_size)	1294	if (len > cbor->max_size && cbor->max_size)
974	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1295	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
975	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1296	(unsigned long)len, (unsigned long)cbor->max_size);
976	}
977
978	sv_utf8_downgrade (string, 0);
979		1297
980	dec.cbor = *cbor;	1298	dec.cbor = *cbor;
981	dec.cur = (U8 *)SvPVX (string);	1299	dec.cur = (U8 *)data;
982	dec.end = (U8 *)SvEND (string);	1300	dec.end = (U8 *)data + len;
983	dec.err = 0;
984	dec.depth = 0;
985
986	if (dec.cbor.cb_object || dec.cbor.cb_sk_object)
987	;//TODO dec.cbor.flags |= F_HOOK;
988		1301
989	sv = decode_sv (&dec);	1302	sv = decode_sv (&dec);
990		1303
991	if (offset_return)	1304	if (offset_return)
992	*offset_return = dec.cur;	1305	*offset_return = dec.cur;
…		…
995	if (dec.cur != dec.end && !dec.err)	1308	if (dec.cur != dec.end && !dec.err)
996	dec.err = "garbage after CBOR object";	1309	dec.err = "garbage after CBOR object";
997		1310
998	if (dec.err)	1311	if (dec.err)
999	{	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
1000	SvREFCNT_dec (sv);	1324	SvREFCNT_dec (sv);
		1325
		1326	if (dec.err_sv)
		1327	sv_2mortal (dec.err_sv);
		1328
1001	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);
1002	}	1330	}
1003		1331
1004	sv = sv_2mortal (sv);	1332	sv = sv_2mortal (sv);
1005		1333
1006	return sv;	1334	return sv;
1007	}	1335	}
1008		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
1009	/////////////////////////////////////////////////////////////////////////////	1461	/////////////////////////////////////////////////////////////////////////////
1010	// XS interface functions	1462	// XS interface functions
1011		1463
1012	MODULE = CBOR::XS PACKAGE = CBOR::XS	1464	MODULE = CBOR::XS PACKAGE = CBOR::XS
1013		1465
1014	BOOT:	1466	BOOT:
1015	{	1467	{
1016	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1468	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1017	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1469	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1018		1470
1019	cbor_true = get_bool ("CBOR::XS::true");	1471	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1020	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));
1021	}	1484	}
1022		1485
1023	PROTOTYPES: DISABLE	1486	PROTOTYPES: DISABLE
1024		1487
1025	void CLONE (...)	1488	void CLONE (...)
1026	CODE:	1489	CODE:
1027	cbor_stash = 0;	1490	cbor_stash = 0;
		1491	cbor_tagged_stash = 0;
		1492	types_error_stash = 0;
1028	cbor_boolean_stash = 0;	1493	types_boolean_stash = 0;
1029		1494
1030	void new (char *klass)	1495	void new (char *klass)
1031	PPCODE:	1496	PPCODE:
1032	{	1497	{
1033	SV *pv = NEWSV (0, sizeof (CBOR));	1498	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1041		1506
1042	void shrink (CBOR *self, int enable = 1)	1507	void shrink (CBOR *self, int enable = 1)
1043	ALIAS:	1508	ALIAS:
1044	shrink = F_SHRINK	1509	shrink = F_SHRINK
1045	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
1046	PPCODE:	1518	PPCODE:
1047	{	1519	{
1048	if (enable)	1520	if (enable)
1049	self->flags |= ix;	1521	self->flags |= ix;
1050	else	1522	else
…		…
1055		1527
1056	void get_shrink (CBOR *self)	1528	void get_shrink (CBOR *self)
1057	ALIAS:	1529	ALIAS:
1058	get_shrink = F_SHRINK	1530	get_shrink = F_SHRINK
1059	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
1060	PPCODE:	1539	PPCODE:
1061	XPUSHs (boolSV (self->flags & ix));	1540	XPUSHs (boolSV (self->flags & ix));
1062		1541
1063	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1542	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1064	PPCODE:	1543	PPCODE:
…		…
1080	CODE:	1559	CODE:
1081	RETVAL = self->max_size;	1560	RETVAL = self->max_size;
1082	OUTPUT:	1561	OUTPUT:
1083	RETVAL	1562	RETVAL
1084		1563
1085	#if 0 //TODO	1564	void filter (CBOR *self, SV *filter = 0)
1086
1087	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1088	PPCODE:	1565	PPCODE:
1089	{
1090	SvREFCNT_dec (self->cb_object);	1566	SvREFCNT_dec (self->filter);
1091	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1567	self->filter = filter ? newSVsv (filter) : filter;
1092
1093	XPUSHs (ST (0));	1568	XPUSHs (ST (0));
1094	}
1095		1569
1096	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1570	SV *get_filter (CBOR *self)
1097	PPCODE:	1571	CODE:
1098	{	1572	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1099	if (!self->cb_sk_object)	1573	OUTPUT:
1100	self->cb_sk_object = newHV ();	1574	RETVAL
1101
1102	if (SvOK (cb))
1103	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1104	else
1105	{
1106	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1107
1108	if (!HvKEYS (self->cb_sk_object))
1109	{
1110	SvREFCNT_dec (self->cb_sk_object);
1111	self->cb_sk_object = 0;
1112	}
1113	}
1114
1115	XPUSHs (ST (0));
1116	}
1117
1118	#endif
1119		1575
1120	void encode (CBOR *self, SV *scalar)	1576	void encode (CBOR *self, SV *scalar)
1121	PPCODE:	1577	PPCODE:
1122	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1578	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1123	XPUSHs (scalar);	1579	XPUSHs (scalar);
…		…
1136	EXTEND (SP, 2);	1592	EXTEND (SP, 2);
1137	PUSHs (sv);	1593	PUSHs (sv);
1138	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1594	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1139	}	1595	}
1140		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
1141	void DESTROY (CBOR *self)	1649	void DESTROY (CBOR *self)
1142	CODE:	1650	PPCODE:
1143	SvREFCNT_dec (self->cb_sk_object);	1651	cbor_free (self);
1144	SvREFCNT_dec (self->cb_object);
1145		1652
1146	PROTOTYPES: ENABLE	1653	PROTOTYPES: ENABLE
1147		1654
1148	void encode_cbor (SV *scalar)	1655	void encode_cbor (SV *scalar)
		1656	ALIAS:
		1657	encode_cbor = 0
		1658	encode_cbor_sharing = F_ALLOW_SHARING
1149	PPCODE:	1659	PPCODE:
1150	{	1660	{
1151	CBOR cbor;	1661	CBOR cbor;
1152	cbor_init (&cbor);	1662	cbor_init (&cbor);
		1663	cbor.flags |= ix;
1153	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1664	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1154	XPUSHs (scalar);	1665	XPUSHs (scalar);
1155	}	1666	}
1156		1667
1157	void decode_cbor (SV *cborstr)	1668	void decode_cbor (SV *cborstr)

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