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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 1.64 by root, Tue Jun 27 02:03:24 2017 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_inc_NN
		27	# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
		28	#endif
		29	#ifndef SvREFCNT_dec_NN
		30	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		31	#endif
17		32
		33	// known major and minor types
		34	enum cbor_type
		35	{
		36	MAJOR_SHIFT = 5,
		37	MINOR_MASK = 0x1f,
		38
		39	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		40	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		41	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		42	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		43	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		44	MAJOR_MAP = 5 << MAJOR_SHIFT,
		45	MAJOR_TAG = 6 << MAJOR_SHIFT,
		46	MAJOR_MISC = 7 << MAJOR_SHIFT,
		47
		48	// INT/STRING/ARRAY/MAP subtypes
		49	LENGTH_EXT1 = 24,
		50	LENGTH_EXT2 = 25,
		51	LENGTH_EXT4 = 26,
		52	LENGTH_EXT8 = 27,
		53
		54	// SIMPLE types (effectively MISC subtypes)
		55	SIMPLE_FALSE = 20,
		56	SIMPLE_TRUE = 21,
		57	SIMPLE_NULL = 22,
		58	SIMPLE_UNDEF = 23,
		59
		60	// MISC subtype (unused)
		61	MISC_EXT1 = 24,
		62	MISC_FLOAT16 = 25,
		63	MISC_FLOAT32 = 26,
		64	MISC_FLOAT64 = 27,
		65
		66	// BYTES/TEXT/ARRAY/MAP
		67	MINOR_INDEF = 31,
		68	};
		69
		70	// known tags
		71	enum cbor_tag
		72	{
		73	// extensions
		74	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
		75	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
		76	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
		77	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
		78	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
		79	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
		80	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
		81
		82	// rfc7049
		83	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
		84	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
		85	CBOR_TAG_POS_BIGNUM = 2, // byte string
		86	CBOR_TAG_NEG_BIGNUM = 3, // byte string
		87	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
		88	CBOR_TAG_BIGFLOAT = 5, // array
		89
		90	CBOR_TAG_CONV_B64U = 21, // base64url, any
		91	CBOR_TAG_CONV_B64 = 22, // base64, any
		92	CBOR_TAG_CONV_HEX = 23, // base16, any
		93	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
		94
		95	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
		96	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
		97	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
		98	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
		99	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
		100
		101	CBOR_TAG_MAGIC = 55799, // self-describe cbor
		102	};
		103
18	#define F_SHRINK 0x00000200UL	104	#define F_SHRINK 0x00000001UL
19	#define F_ALLOW_UNKNOWN 0x00002000UL	105	#define F_ALLOW_UNKNOWN 0x00000002UL
		106	#define F_ALLOW_SHARING 0x00000004UL
		107	#define F_ALLOW_CYCLES 0x00000008UL
		108	#define F_FORBID_OBJECTS 0x00000010UL
		109	#define F_PACK_STRINGS 0x00000020UL
		110	#define F_TEXT_KEYS 0x00000040UL
		111	#define F_TEXT_STRINGS 0x00000080UL
		112	#define F_VALIDATE_UTF8 0x00000100UL
20		113
21	#define INIT_SIZE 32 // initial scalar size to be allocated	114	#define INIT_SIZE 32 // initial scalar size to be allocated
22		115
23	#define SB do {	116	#define SB do {
24	#define SE } while (0)	117	#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		118
37	#define IN_RANGE_INC(type,val,beg,end) \	119	#define IN_RANGE_INC(type,val,beg,end) \
38	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \	120	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
39	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))	121	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
40		122
…		…
46	#else	128	#else
47	# define CBOR_SLOW 0	129	# define CBOR_SLOW 0
48	# define CBOR_STASH cbor_stash	130	# define CBOR_STASH cbor_stash
49	#endif	131	#endif
50		132
51	static HV *cbor_stash, *cbor_boolean_stash; // CBOR::XS::	133	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
52	static SV *cbor_true, *cbor_false;	134	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
53		135
54	typedef struct {	136	typedef struct {
55	U32 flags;	137	U32 flags;
56	U32 max_depth;	138	U32 max_depth;
57	STRLEN max_size;	139	STRLEN max_size;
		140	SV *filter;
58		141
59	SV *cb_object;	142	// for the incremental parser
60	HV *cb_sk_object;	143	STRLEN incr_pos; // the current offset into the text
		144	STRLEN incr_need; // minimum bytes needed to decode
		145	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
61	} CBOR;	146	} CBOR;
62		147
63	INLINE void	148	ecb_inline void
64	cbor_init (CBOR *cbor)	149	cbor_init (CBOR *cbor)
65	{	150	{
66	Zero (cbor, 1, CBOR);	151	Zero (cbor, 1, CBOR);
67	cbor->max_depth = 512;	152	cbor->max_depth = 512;
68	}	153	}
69		154
		155	ecb_inline void
		156	cbor_free (CBOR *cbor)
		157	{
		158	SvREFCNT_dec (cbor->filter);
		159	SvREFCNT_dec (cbor->incr_count);
		160	}
		161
70	/////////////////////////////////////////////////////////////////////////////	162	/////////////////////////////////////////////////////////////////////////////
71	// utility functions	163	// utility functions
72		164
73	INLINE SV *	165	ecb_inline SV *
74	get_bool (const char *name)	166	get_bool (const char *name)
75	{	167	{
76	SV *sv = get_sv (name, 1);	168	SV *sv = get_sv (name, 1);
77		169
78	SvREADONLY_on (sv);	170	SvREADONLY_on (sv);
79	SvREADONLY_on (SvRV (sv));	171	SvREADONLY_on (SvRV (sv));
80		172
81	return sv;	173	return sv;
82	}	174	}
83		175
84	INLINE void	176	ecb_inline void
85	shrink (SV *sv)	177	shrink (SV *sv)
86	{	178	{
87	sv_utf8_downgrade (sv, 1);	179	sv_utf8_downgrade (sv, 1);
88		180
89	if (SvLEN (sv) > SvCUR (sv) + 1)	181	if (SvLEN (sv) > SvCUR (sv) + 1)
…		…
94	SvPV_renew (sv, SvCUR (sv) + 1);	186	SvPV_renew (sv, SvCUR (sv) + 1);
95	#endif	187	#endif
96	}	188	}
97	}	189	}
98		190
99	/////////////////////////////////////////////////////////////////////////////	191	// minimum length of a string to be registered for stringref
100	// fp hell	192	ecb_inline int
101		193	minimum_string_length (UV idx)
102	//TODO	194	{
		195	return idx <= 23 ? 3
		196	: idx <= 0xffU ? 4
		197	: idx <= 0xffffU ? 5
		198	: idx <= 0xffffffffU ? 7
		199	: 11;
		200	}
103		201
104	/////////////////////////////////////////////////////////////////////////////	202	/////////////////////////////////////////////////////////////////////////////
105	// encoder	203	// encoder
106		204
107	// structure used for encoding CBOR	205	// structure used for encoding CBOR
…		…
110	char *cur; // SvPVX (sv) + current output position	208	char *cur; // SvPVX (sv) + current output position
111	char *end; // SvEND (sv)	209	char *end; // SvEND (sv)
112	SV *sv; // result scalar	210	SV *sv; // result scalar
113	CBOR cbor;	211	CBOR cbor;
114	U32 depth; // recursion level	212	U32 depth; // recursion level
		213	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		214	UV stringref_idx;
		215	HV *shareable; // ptr => index, or 0
		216	UV shareable_idx;
115	} enc_t;	217	} enc_t;
116		218
117	INLINE void	219	ecb_inline void
118	need (enc_t *enc, STRLEN len)	220	need (enc_t *enc, STRLEN len)
119	{	221	{
120	if (expect_false (enc->cur + len >= enc->end))	222	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
121	{	223	{
122	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	224	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
123	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	225	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
124	enc->cur = SvPVX (enc->sv) + cur;	226	enc->cur = SvPVX (enc->sv) + cur;
125	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	227	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
126	}	228	}
127	}	229	}
128		230
129	INLINE void	231	ecb_inline void
130	encode_ch (enc_t *enc, char ch)	232	encode_ch (enc_t *enc, char ch)
131	{	233	{
132	need (enc, 1);	234	need (enc, 1);
133	*enc->cur++ = ch;	235	*enc->cur++ = ch;
134	}	236	}
…		…
136	static void	238	static void
137	encode_uint (enc_t *enc, int major, UV len)	239	encode_uint (enc_t *enc, int major, UV len)
138	{	240	{
139	need (enc, 9);	241	need (enc, 9);
140		242
141	if (len < 24)	243	if (ecb_expect_true (len < LENGTH_EXT1))
142	*enc->cur++ = major | len;	244	*enc->cur++ = major | len;
143	else if (len < 0x100)	245	else if (ecb_expect_true (len <= 0xffU))
144	{	246	{
145	*enc->cur++ = major | 24;	247	*enc->cur++ = major | LENGTH_EXT1;
146	*enc->cur++ = len;	248	*enc->cur++ = len;
147	}	249	}
148	else if (len < 0x10000)	250	else if (len <= 0xffffU)
149	{	251	{
150	*enc->cur++ = major | 25;	252	*enc->cur++ = major | LENGTH_EXT2;
151	*enc->cur++ = len >> 8;	253	*enc->cur++ = len >> 8;
152	*enc->cur++ = len;	254	*enc->cur++ = len;
153	}	255	}
154	else if (len < 0x100000000)	256	else if (len <= 0xffffffffU)
155	{	257	{
156	*enc->cur++ = major | 26;	258	*enc->cur++ = major | LENGTH_EXT4;
157	*enc->cur++ = len >> 24;	259	*enc->cur++ = len >> 24;
158	*enc->cur++ = len >> 16;	260	*enc->cur++ = len >> 16;
159	*enc->cur++ = len >> 8;	261	*enc->cur++ = len >> 8;
160	*enc->cur++ = len;	262	*enc->cur++ = len;
161	}	263	}
162	else if (len)	264	else
163	{	265	{
164	*enc->cur++ = major | 27;	266	*enc->cur++ = major | LENGTH_EXT8;
165	*enc->cur++ = len >> 56;	267	*enc->cur++ = len >> 56;
166	*enc->cur++ = len >> 48;	268	*enc->cur++ = len >> 48;
167	*enc->cur++ = len >> 40;	269	*enc->cur++ = len >> 40;
168	*enc->cur++ = len >> 32;	270	*enc->cur++ = len >> 32;
169	*enc->cur++ = len >> 24;	271	*enc->cur++ = len >> 24;
…		…
171	*enc->cur++ = len >> 8;	273	*enc->cur++ = len >> 8;
172	*enc->cur++ = len;	274	*enc->cur++ = len;
173	}	275	}
174	}	276	}
175		277
176	static void	278	ecb_inline void
		279	encode_tag (enc_t *enc, UV tag)
		280	{
		281	encode_uint (enc, MAJOR_TAG, tag);
		282	}
		283
		284	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		285	ecb_noinline static void
177	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	286	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
178	{	287	{
179	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	288	STRLEN ulen = len;
		289	U8 *p, *pend = (U8 *)str + len;
		290
		291	for (p = (U8 *)str; p < pend; ++p)
		292	ulen += *p >> 7; // count set high bits
		293
		294	encode_uint (enc, MAJOR_TEXT, ulen);
		295
		296	need (enc, ulen);
		297	for (p = (U8 *)str; p < pend; ++p)
		298	if (*p < 0x80)
		299	*enc->cur++ = *p;
		300	else
		301	{
		302	*enc->cur++ = 0xc0 + (*p >> 6);
		303	*enc->cur++ = 0x80 + (*p & 63);
		304	}
		305	}
		306
		307	ecb_inline void
		308	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		309	{
		310	if (ecb_expect_false (upgrade_utf8))
		311	if (!utf8)
		312	{
		313	encode_str_utf8 (enc, utf8, str, len);
		314	return;
		315	}
		316
		317	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
180	need (enc, len);	318	need (enc, len);
181	memcpy (enc->cur, str, len);	319	memcpy (enc->cur, str, len);
182	enc->cur += len;	320	enc->cur += len;
183	}	321	}
184		322
		323	ecb_inline void
		324	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		325	{
		326	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		327	{
		328	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		329
		330	if (SvOK (*svp))
		331	{
		332	// already registered, use stringref
		333	encode_tag (enc, CBOR_TAG_STRINGREF);
		334	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		335	return;
		336	}
		337	else if (len >= minimum_string_length (enc->stringref_idx))
		338	{
		339	// register only
		340	sv_setuv (*svp, enc->stringref_idx);
		341	++enc->stringref_idx;
		342	}
		343	}
		344
		345	encode_str (enc, upgrade_utf8, utf8, str, len);
		346	}
		347
185	static void encode_sv (enc_t *enc, SV *sv);	348	static void encode_sv (enc_t *enc, SV *sv);
186		349
187	static void	350	static void
188	encode_av (enc_t *enc, AV *av)	351	encode_av (enc_t *enc, AV *av)
189	{	352	{
…		…
192	if (enc->depth >= enc->cbor.max_depth)	355	if (enc->depth >= enc->cbor.max_depth)
193	croak (ERR_NESTING_EXCEEDED);	356	croak (ERR_NESTING_EXCEEDED);
194		357
195	++enc->depth;	358	++enc->depth;
196		359
197	encode_uint (enc, 0x80, len + 1);	360	encode_uint (enc, MAJOR_ARRAY, len + 1);
198		361
		362	if (ecb_expect_false (SvMAGICAL (av)))
199	for (i = 0; i <= len; ++i)	363	for (i = 0; i <= len; ++i)
200	{	364	{
201	SV **svp = av_fetch (av, i, 0);	365	SV **svp = av_fetch (av, i, 0);
202	encode_sv (enc, svp ? *svp : &PL_sv_undef);	366	encode_sv (enc, svp ? *svp : &PL_sv_undef);
203	}	367	}
		368	else
		369	for (i = 0; i <= len; ++i)
		370	{
		371	SV *sv = AvARRAY (av)[i];
		372	encode_sv (enc, sv ? sv : &PL_sv_undef);
		373	}
204		374
205	--enc->depth;	375	--enc->depth;
206	}	376	}
207		377
208	static void	378	static void
…		…
216	++enc->depth;	386	++enc->depth;
217		387
218	int pairs = hv_iterinit (hv);	388	int pairs = hv_iterinit (hv);
219	int mg = SvMAGICAL (hv);	389	int mg = SvMAGICAL (hv);
220		390
221	if (mg)	391	if (ecb_expect_false (mg))
222	encode_ch (enc, 0xa0 | 31);	392	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
223	else	393	else
224	encode_uint (enc, 0xa0, pairs);	394	encode_uint (enc, MAJOR_MAP, pairs);
225		395
226	while ((he = hv_iternext (hv)))	396	while ((he = hv_iternext (hv)))
227	{	397	{
228	if (HeKLEN (he) == HEf_SVKEY)	398	if (HeKLEN (he) == HEf_SVKEY)
229	encode_sv (enc, HeSVKEY (he));	399	encode_sv (enc, HeSVKEY (he));
230	else	400	else
231	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	401	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
232		402
233	encode_sv (enc, expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	403	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
234	}	404	}
235		405
236	if (mg)	406	if (ecb_expect_false (mg))
237	encode_ch (enc, 0xe0 | 31);	407	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
238		408
239	--enc->depth;	409	--enc->depth;
240	}	410	}
241		411
242	// encode objects, arrays and special \0=false and \1=true values.	412	// encode objects, arrays and special \0=false and \1=true values.
243	static void	413	static void
244	encode_rv (enc_t *enc, SV *sv)	414	encode_rv (enc_t *enc, SV *sv)
245	{	415	{
246	svtype svt;
247
248	SvGETMAGIC (sv);	416	SvGETMAGIC (sv);
		417
249	svt = SvTYPE (sv);	418	svtype svt = SvTYPE (sv);
250		419
251	if (expect_false (SvOBJECT (sv)))	420	if (ecb_expect_false (SvOBJECT (sv)))
252	{	421	{
253	HV *stash = !CBOR_SLOW || cbor_boolean_stash	422	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
254	? cbor_boolean_stash	423	? types_boolean_stash
		424	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		425	HV *error_stash = !CBOR_SLOW || types_error_stash
		426	? types_error_stash
		427	: gv_stashpv ("Types::Serialiser::Error", 1);
		428	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		429	? cbor_tagged_stash
255	: gv_stashpv ("CBOR::XS::Boolean", 1);	430	: gv_stashpv ("CBOR::XS::Tagged" , 1);
256		431
257	if (SvSTASH (sv) == stash)	432	HV *stash = SvSTASH (sv);
258	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	433
		434	if (stash == boolean_stash)
		435	{
		436	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		437	return;
		438	}
		439	else if (stash == error_stash)
		440	{
		441	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		442	return;
		443	}
		444	else if (stash == tagged_stash)
		445	{
		446	if (svt != SVt_PVAV)
		447	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		448
		449	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
		450	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		451
		452	return;
		453	}
		454	}
		455
		456	if (ecb_expect_false (SvREFCNT (sv) > 1)
		457	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		458	{
		459	if (ecb_expect_false (!enc->shareable))
		460	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		461
		462	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		463
		464	if (SvOK (*svp))
		465	{
		466	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		467	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		468	return;
		469	}
259	else	470	else
260	{	471	{
261	#if 0 //TODO	472	sv_setuv (*svp, enc->shareable_idx);
262	if (enc->cbor.flags & F_CONV_BLESSED)	473	++enc->shareable_idx;
		474	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		475	}
		476	}
		477
		478	if (ecb_expect_false (SvOBJECT (sv)))
		479	{
		480	HV *stash = SvSTASH (sv);
		481	GV *method;
		482
		483	if (enc->cbor.flags & F_FORBID_OBJECTS)
		484	croak ("encountered object '%s', but forbid_objects is enabled",
		485	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		486	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
263	{	487	{
		488	dSP;
		489
		490	ENTER; SAVETMPS;
		491	PUSHMARK (SP);
264	// we re-bless the reference to get overload and other niceties right	492	// we re-bless the reference to get overload and other niceties right
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)));	493	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
273		494
274	// calling with G_SCALAR ensures that we always get a 1 return value
275	PUTBACK;	495	PUTBACK;
		496	// G_SCALAR ensures that return value is 1
276	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	497	call_sv ((SV *)GvCV (method), G_SCALAR);
277	SPAGAIN;	498	SPAGAIN;
278		499
279	// catch this surprisingly common error	500	// catch this surprisingly common error
280	if (SvROK (TOPs) && SvRV (TOPs) == sv)	501	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)));	502	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
282		503
283	sv = POPs;
284	PUTBACK;
285
286	encode_sv (enc, sv);	504	encode_sv (enc, POPs);
287		505
		506	PUTBACK;
		507
288	FREETMPS; LEAVE;	508	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	}	509	}
296	else if (enc->cbor.flags & F_ALLOW_BLESSED)	510	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
297	encode_str (enc, "null", 4, 0);	511	{
		512	dSP;
		513
		514	ENTER; SAVETMPS;
		515	SAVESTACK_POS ();
		516	PUSHMARK (SP);
		517	EXTEND (SP, 2);
		518	// we re-bless the reference to get overload and other niceties right
		519	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		520	PUSHs (sv_cbor);
		521
		522	PUTBACK;
		523	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		524	SPAGAIN;
		525
		526	// catch this surprisingly common error
		527	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		528	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		529
		530	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		531	encode_uint (enc, MAJOR_ARRAY, count + 1);
		532	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		533
		534	while (count)
		535	encode_sv (enc, SP[1 - count--]);
		536
		537	PUTBACK;
		538
		539	FREETMPS; LEAVE;
		540	}
298	else	541	else
299	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	542	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
300	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	543	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
301	#endif
302	}
303	}	544	}
304	else if (svt == SVt_PVHV)	545	else if (svt == SVt_PVHV)
305	encode_hv (enc, (HV *)sv);	546	encode_hv (enc, (HV *)sv);
306	else if (svt == SVt_PVAV)	547	else if (svt == SVt_PVAV)
307	encode_av (enc, (AV *)sv);	548	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	549	else
326	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	550	{
327	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	551	encode_tag (enc, CBOR_TAG_INDIRECTION);
		552	encode_sv (enc, sv);
		553	}
328	}	554	}
329		555
330	static void	556	static void
331	encode_nv (enc_t *enc, SV *sv)	557	encode_nv (enc_t *enc, SV *sv)
332	{	558	{
333	double nv = SvNVX (sv);	559	double nv = SvNVX (sv);
334		560
335	need (enc, 9);	561	need (enc, 9);
336		562
337	if (expect_false (nv == (U32)nv))	563	if (ecb_expect_false (nv == (NV)(U32)nv))
338	encode_uint (enc, 0x00, (U32)nv);	564	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
339	//TODO: maybe I32?	565	//TODO: maybe I32?
340	else if (expect_false (nv == (float)nv))	566	else if (ecb_expect_false (nv == (float)nv))
341	{	567	{
		568	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
		569
342	uint32_t fp = ecb_float_to_binary32 (nv);	570	uint32_t fp = ecb_float_to_binary32 (nv);
343
344	*enc->cur++ = 0xe0 | 26;
345		571
346	if (!ecb_big_endian ())	572	if (!ecb_big_endian ())
347	fp = ecb_bswap32 (fp);	573	fp = ecb_bswap32 (fp);
348		574
349	memcpy (enc->cur, &fp, 4);	575	memcpy (enc->cur, &fp, 4);
350	enc->cur += 4;	576	enc->cur += 4;
351	}	577	}
352	else	578	else
353	{	579	{
		580	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
		581
354	uint64_t fp = ecb_double_to_binary64 (nv);	582	uint64_t fp = ecb_double_to_binary64 (nv);
355
356	*enc->cur++ = 0xe0 | 27;
357		583
358	if (!ecb_big_endian ())	584	if (!ecb_big_endian ())
359	fp = ecb_bswap64 (fp);	585	fp = ecb_bswap64 (fp);
360		586
361	memcpy (enc->cur, &fp, 8);	587	memcpy (enc->cur, &fp, 8);
…		…
370		596
371	if (SvPOKp (sv))	597	if (SvPOKp (sv))
372	{	598	{
373	STRLEN len;	599	STRLEN len;
374	char *str = SvPV (sv, len);	600	char *str = SvPV (sv, len);
375	encode_str (enc, SvUTF8 (sv), str, len);	601	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
376	}	602	}
377	else if (SvNOKp (sv))	603	else if (SvNOKp (sv))
378	encode_nv (enc, sv);	604	encode_nv (enc, sv);
379	else if (SvIOKp (sv))	605	else if (SvIOKp (sv))
380	{	606	{
381	if (SvIsUV (sv))	607	if (SvIsUV (sv))
382	encode_uint (enc, 0x00, SvUVX (sv));	608	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
383	else if (SvIVX (sv) >= 0)	609	else if (SvIVX (sv) >= 0)
384	encode_uint (enc, 0x00, SvIVX (sv));	610	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
385	else	611	else
386	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	612	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
387	}	613	}
388	else if (SvROK (sv))	614	else if (SvROK (sv))
389	encode_rv (enc, SvRV (sv));	615	encode_rv (enc, SvRV (sv));
390	else if (!SvOK (sv))	616	else if (!SvOK (sv))
391	encode_ch (enc, 0xe0 | 22);	617	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
392	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	618	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
393	encode_ch (enc, 0xe0 | 23);	619	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
394	else	620	else
395	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	621	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
396	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	622	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
397	}	623	}
398		624
399	static SV *	625	static SV *
400	encode_cbor (SV *scalar, CBOR *cbor)	626	encode_cbor (SV *scalar, CBOR *cbor)
401	{	627	{
402	enc_t enc;	628	enc_t enc = { 0 };
403		629
404	enc.cbor = *cbor;	630	enc.cbor = *cbor;
405	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	631	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
406	enc.cur = SvPVX (enc.sv);	632	enc.cur = SvPVX (enc.sv);
407	enc.end = SvEND (enc.sv);	633	enc.end = SvEND (enc.sv);
408	enc.depth = 0;
409		634
410	SvPOK_only (enc.sv);	635	SvPOK_only (enc.sv);
		636
		637	if (cbor->flags & F_PACK_STRINGS)
		638	{
		639	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		640	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		641	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		642	}
		643
411	encode_sv (&enc, scalar);	644	encode_sv (&enc, scalar);
412		645
413	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	646	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
414	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	647	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
415		648
…		…
429	U8 *end; // end of input string	662	U8 *end; // end of input string
430	const char *err; // parse error, if != 0	663	const char *err; // parse error, if != 0
431	CBOR cbor;	664	CBOR cbor;
432	U32 depth; // recursion depth	665	U32 depth; // recursion depth
433	U32 maxdepth; // recursion depth limit	666	U32 maxdepth; // recursion depth limit
		667	AV *shareable;
		668	AV *stringref;
		669	SV *decode_tagged;
		670	SV *err_sv; // optional sv for error, needs to be freed
434	} dec_t;	671	} dec_t;
435		672
436	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	673	// set dec->err to ERRSV
		674	ecb_cold static void
		675	err_errsv (dec_t *dec)
		676	{
		677	if (!dec->err)
		678	{
		679	dec->err_sv = newSVsv (ERRSV);
437		680
438	#define WANT(len) if (expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data");	681	// chop off the trailing \n
		682	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		683	*SvEND (dec->err_sv) = 0;
439		684
		685	dec->err = SvPVutf8_nolen (dec->err_sv);
		686	}
		687	}
		688
		689	// the following functions are used to reduce code size and help the compiler to optimise
		690	ecb_cold static void
		691	err_set (dec_t *dec, const char *reason)
		692	{
		693	if (!dec->err)
		694	dec->err = reason;
		695	}
		696
		697	ecb_cold static void
		698	err_unexpected_end (dec_t *dec)
		699	{
		700	err_set (dec, "unexpected end of CBOR data");
		701	}
		702
		703	#define ERR_DO(do) SB do; goto fail; SE
		704	#define ERR(reason) ERR_DO (err_set (dec, reason))
		705	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		706
		707	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		708
440	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	709	#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	710	#define DEC_DEC_DEPTH --dec->depth
442		711
443	static UV	712	static UV
444	decode_uint (dec_t *dec)	713	decode_uint (dec_t *dec)
445	{	714	{
446	switch (*dec->cur & 31)	715	U8 m = *dec->cur & MINOR_MASK;
447	{	716	++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		717
453	case 24:	718	if (ecb_expect_true (m < LENGTH_EXT1))
		719	return m;
		720	else if (ecb_expect_true (m == LENGTH_EXT1))
		721	{
454	WANT (2);	722	WANT (1);
455	dec->cur += 2;	723	dec->cur += 1;
456	return dec->cur[-1];	724	return dec->cur[-1];
457		725	}
458	case 25:	726	else if (ecb_expect_true (m == LENGTH_EXT2))
		727	{
459	WANT (3);	728	WANT (2);
460	dec->cur += 3;	729	dec->cur += 2;
461	return (((UV)dec->cur[-2]) << 8)	730	return (((UV)dec->cur[-2]) << 8)
462	| ((UV)dec->cur[-1]);	731	| ((UV)dec->cur[-1]);
463		732	}
464	case 26:	733	else if (ecb_expect_true (m == LENGTH_EXT4))
		734	{
465	WANT (5);	735	WANT (4);
466	dec->cur += 5;	736	dec->cur += 4;
467	return (((UV)dec->cur[-4]) << 24)	737	return (((UV)dec->cur[-4]) << 24)
468	| (((UV)dec->cur[-3]) << 16)	738	| (((UV)dec->cur[-3]) << 16)
469	| (((UV)dec->cur[-2]) << 8)	739	| (((UV)dec->cur[-2]) << 8)
470	| ((UV)dec->cur[-1]);	740	| ((UV)dec->cur[-1]);
471		741	}
472	case 27:	742	else if (ecb_expect_true (m == LENGTH_EXT8))
		743	{
473	WANT (9);	744	WANT (8);
474	dec->cur += 9;	745	dec->cur += 8;
		746
		747	return
		748	#if UVSIZE < 8
		749	0
		750	#else
475	return (((UV)dec->cur[-8]) << 56)	751	(((UV)dec->cur[-8]) << 56)
476	| (((UV)dec->cur[-7]) << 48)	752	| (((UV)dec->cur[-7]) << 48)
477	| (((UV)dec->cur[-6]) << 40)	753	| (((UV)dec->cur[-6]) << 40)
478	| (((UV)dec->cur[-5]) << 32)	754	| (((UV)dec->cur[-5]) << 32)
		755	#endif
479	| (((UV)dec->cur[-4]) << 24)	756	| (((UV)dec->cur[-4]) << 24)
480	| (((UV)dec->cur[-3]) << 16)	757	| (((UV)dec->cur[-3]) << 16)
481	| (((UV)dec->cur[-2]) << 8)	758	| (((UV)dec->cur[-2]) << 8)
482	| ((UV)dec->cur[-1]);	759	| ((UV)dec->cur[-1]);
483		760	}
484	default:	761	else
485	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	762	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
486	}
487		763
488	fail:	764	fail:
489	return 0;	765	return 0;
490	}	766	}
491		767
…		…
496	{	772	{
497	AV *av = newAV ();	773	AV *av = newAV ();
498		774
499	DEC_INC_DEPTH;	775	DEC_INC_DEPTH;
500		776
501	if ((*dec->cur & 31) == 31)	777	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
502	{	778	{
503	++dec->cur;	779	++dec->cur;
504		780
505	for (;;)	781	for (;;)
506	{	782	{
507	WANT (1);	783	WANT (1);
508		784
509	if (*dec->cur == 0xe0 | 31)	785	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
510	{	786	{
511	++dec->cur;	787	++dec->cur;
512	break;	788	break;
513	}	789	}
514		790
515	av_push (av, decode_sv (dec));	791	av_push (av, decode_sv (dec));
516	}	792	}
517	}	793	}
518	else	794	else
519	{	795	{
520	int i, len = decode_uint (dec);	796	UV i, len = decode_uint (dec);
521		797
		798	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);	799	av_fill (av, len - 1);
523		800
524	for (i = 0; i < len; ++i)	801	for (i = 0; i < len; ++i)
525	AvARRAY (av)[i] = decode_sv (dec);	802	AvARRAY (av)[i] = decode_sv (dec);
526	}	803	}
527		804
528	DEC_DEC_DEPTH;	805	DEC_DEC_DEPTH;
529	return newRV_noinc ((SV *)av);	806	return newRV_noinc ((SV *)av);
530		807
531	fail:	808	fail:
532	SvREFCNT_dec (av);	809	SvREFCNT_dec_NN (av);
533	DEC_DEC_DEPTH;	810	DEC_DEC_DEPTH;
534	return &PL_sv_undef;	811	return &PL_sv_undef;
535	}	812	}
536		813
		814	static void
		815	decode_he (dec_t *dec, HV *hv)
		816	{
		817	// for speed reasons, we specialcase single-string
		818	// byte or utf-8 strings as keys, but only when !stringref
		819
		820	if (ecb_expect_true (!dec->stringref))
		821	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		822	{
		823	STRLEN len = decode_uint (dec);
		824	char *key = (char *)dec->cur;
		825
		826	WANT (len);
		827	dec->cur += len;
		828
		829	hv_store (hv, key, len, decode_sv (dec), 0);
		830
		831	return;
		832	}
		833	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		834	{
		835	STRLEN len = decode_uint (dec);
		836	char *key = (char *)dec->cur;
		837
		838	WANT (len);
		839	dec->cur += len;
		840
		841	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		842	if (!is_utf8_string (key, len))
		843	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		844
		845	hv_store (hv, key, -len, decode_sv (dec), 0);
		846
		847	return;
		848	}
		849
		850	SV *k = decode_sv (dec);
		851	SV *v = decode_sv (dec);
		852
		853	// we leak memory if uncaught exceptions are thrown by random magical
		854	// methods, and this is hopefully the only place where it can happen,
		855	// so if there is a chance of an exception, take the very slow path.
		856	// since catching exceptions is "undocumented/internal/forbidden" by
		857	// the new p5p powers, we need to call out to a perl function :/
		858	if (ecb_expect_false (SvAMAGIC (k)))
		859	{
		860	dSP;
		861
		862	ENTER; SAVETMPS;
		863	PUSHMARK (SP);
		864	EXTEND (SP, 3);
		865	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		866	PUSHs (sv_2mortal (k));
		867	PUSHs (sv_2mortal (v));
		868
		869	PUTBACK;
		870	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		871	SPAGAIN;
		872
		873	FREETMPS; LEAVE;
		874
		875	if (SvTRUE (ERRSV))
		876	ERR_ERRSV;
		877
		878	return;
		879	}
		880
		881	hv_store_ent (hv, k, v, 0);
		882	SvREFCNT_dec_NN (k);
		883
		884	fail:
		885	;
		886	}
		887
537	static SV *	888	static SV *
538	decode_hv (dec_t *dec)	889	decode_hv (dec_t *dec)
539	{	890	{
540	HV *hv = newHV ();	891	HV *hv = newHV ();
541		892
542	DEC_INC_DEPTH;	893	DEC_INC_DEPTH;
543		894
544	if ((*dec->cur & 31) == 31)	895	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
545	{	896	{
546	++dec->cur;	897	++dec->cur;
547		898
548	for (;;)	899	for (;;)
549	{	900	{
550	WANT (1);	901	WANT (1);
551		902
552	if (*dec->cur == 0xe0 | 31)	903	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
553	{	904	{
554	++dec->cur;	905	++dec->cur;
555	break;	906	break;
556	}	907	}
557		908
558	SV *k = decode_sv (dec);	909	decode_he (dec, hv);
559	SV *v = decode_sv (dec);
560
561	hv_store_ent (hv, k, v, 0);
562	}	910	}
563	}	911	}
564	else	912	else
565	{	913	{
566	int len = decode_uint (dec);	914	UV pairs = decode_uint (dec);
567		915
		916	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		917
568	while (len--)	918	while (pairs--)
569	{	919	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	}	920	}
576		921
577	DEC_DEC_DEPTH;	922	DEC_DEC_DEPTH;
578	return newRV_noinc ((SV *)hv);	923	return newRV_noinc ((SV *)hv);
579		924
580	#if 0	925	fail:
581	SV *sv;	926	SvREFCNT_dec_NN (hv);
582	HV *hv = newHV ();
583
584	DEC_INC_DEPTH;	927	DEC_DEC_DEPTH;
585	decode_ws (dec);	928	return &PL_sv_undef;
		929	}
586		930
587	for (;;)	931	static SV *
588	{	932	decode_str (dec_t *dec, int utf8)
589	// heuristic: assume that	933	{
590	// a) decode_str + hv_store_ent are abysmally slow.	934	SV *sv = 0;
591	// b) most hash keys are short, simple ascii text.	935
592	// => try to "fast-match" such strings to avoid	936	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
593	// the overhead of decode_str + hv_store_ent.
594	{	937	{
595	SV *value;	938	// indefinite length strings
596	char *p = dec->cur;	939	++dec->cur;
597	char *e = p + 24; // only try up to 24 bytes
598		940
		941	U8 major = *dec->cur & MAJOR_MISC;
		942
		943	sv = newSVpvn ("", 0);
		944
599	for (;;)	945	for (;;)
600	{	946	{
601	// the >= 0x80 is false on most architectures	947	WANT (1);
602	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')	948
		949	if ((*dec->cur - major) > LENGTH_EXT8)
		950	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
603	{	951	{
604	// slow path, back up and use decode_str	952	++dec->cur;
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;	953	break;
623	}	954	}
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	{	955	else
689	dSP;	956	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
690	int count;
691		957
692	ENTER; SAVETMPS; PUSHMARK (SP);	958	STRLEN len = decode_uint (dec);
693	XPUSHs (HeVAL (he));
694	sv_2mortal (sv);
695		959
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
735	fail:
736	SvREFCNT_dec (hv);
737	DEC_DEC_DEPTH;
738	return &PL_sv_undef;
739	}
740
741	static SV *
742	decode_str (dec_t *dec, int utf8)
743	{
744	SV *sv;
745
746	if ((*dec->cur & 31) == 31)
747	{
748	++dec->cur;
749
750	sv = newSVpvn ("", 0);
751
752	// not very fast, and certainly not robust against illegal input
753	for (;;)
754	{
755	WANT (1);	960	WANT (len);
756		961	sv_catpvn (sv, dec->cur, len);
757	if (*dec->cur == 0xe0 | 31)	962	dec->cur += len;
758	{
759	++dec->cur;
760	break;
761	}
762
763	SV *sv2 = decode_sv (dec);
764	sv_catsv (sv, sv2);
765	}	963	}
766	}	964	}
767	else	965	else
768	{	966	{
769	STRLEN len = decode_uint (dec);	967	STRLEN len = decode_uint (dec);
770		968
771	WANT (len);	969	WANT (len);
772	sv = newSVpvn (dec->cur, len);	970	sv = newSVpvn (dec->cur, len);
773	dec->cur += len;	971	dec->cur += len;
		972
		973	if (ecb_expect_false (dec->stringref)
		974	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		975	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
774	}	976	}
775		977
776	if (utf8)	978	if (utf8)
		979	{
		980	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		981	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		982	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		983
777	SvUTF8_on (sv);	984	SvUTF8_on (sv);
		985	}
778		986
779	return sv;	987	return sv;
780		988
781	fail:	989	fail:
		990	SvREFCNT_dec (sv);
		991	return &PL_sv_undef;
		992	}
		993
		994	static SV *
		995	decode_tagged (dec_t *dec)
		996	{
		997	SV *sv = 0;
		998	UV tag = decode_uint (dec);
		999
		1000	WANT (1);
		1001
		1002	switch (tag)
		1003	{
		1004	case CBOR_TAG_MAGIC:
		1005	sv = decode_sv (dec);
		1006	break;
		1007
		1008	case CBOR_TAG_INDIRECTION:
		1009	sv = newRV_noinc (decode_sv (dec));
		1010	break;
		1011
		1012	case CBOR_TAG_STRINGREF_NAMESPACE:
		1013	{
		1014	// do not use SAVETMPS/FREETMPS, as these will
		1015	// erase mortalised caches, e.g. "shareable"
		1016	ENTER;
		1017
		1018	SAVESPTR (dec->stringref);
		1019	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1020
		1021	sv = decode_sv (dec);
		1022
		1023	LEAVE;
		1024	}
		1025	break;
		1026
		1027	case CBOR_TAG_STRINGREF:
		1028	{
		1029	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1030	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1031
		1032	UV idx = decode_uint (dec);
		1033
		1034	if (!dec->stringref || idx >= (UV)(1 + AvFILLp (dec->stringref)))
		1035	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1036
		1037	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1038	}
		1039	break;
		1040
		1041	case CBOR_TAG_VALUE_SHAREABLE:
		1042	{
		1043	if (ecb_expect_false (!dec->shareable))
		1044	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1045
		1046	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1047	{
		1048	sv = newSV (0);
		1049	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1050
		1051	SV *osv = decode_sv (dec);
		1052	sv_setsv (sv, osv);
		1053	SvREFCNT_dec_NN (osv);
		1054	}
		1055	else
		1056	{
		1057	av_push (dec->shareable, &PL_sv_undef);
		1058	int idx = AvFILLp (dec->shareable);
		1059	sv = decode_sv (dec);
		1060	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1061	}
		1062	}
		1063	break;
		1064
		1065	case CBOR_TAG_VALUE_SHAREDREF:
		1066	{
		1067	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1068	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1069
		1070	UV idx = decode_uint (dec);
		1071
		1072	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
		1073	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1074
		1075	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1076
		1077	if (sv == &PL_sv_undef)
		1078	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1079	}
		1080	break;
		1081
		1082	case CBOR_TAG_PERL_OBJECT:
		1083	{
		1084	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1085	goto filter;
		1086
		1087	sv = decode_sv (dec);
		1088
		1089	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1090	ERR ("corrupted CBOR data (non-array perl object)");
		1091
		1092	AV *av = (AV *)SvRV (sv);
		1093	int len = av_len (av) + 1;
		1094	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1095
		1096	if (!stash)
		1097	ERR ("cannot decode perl-object (package does not exist)");
		1098
		1099	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1100
		1101	if (!method)
		1102	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1103
		1104	dSP;
		1105
		1106	ENTER; SAVETMPS;
		1107	PUSHMARK (SP);
		1108	EXTEND (SP, len + 1);
		1109	// we re-bless the reference to get overload and other niceties right
		1110	PUSHs (*av_fetch (av, 0, 1));
		1111	PUSHs (sv_cbor);
		1112
		1113	int i;
		1114
		1115	for (i = 1; i < len; ++i)
		1116	PUSHs (*av_fetch (av, i, 1));
		1117
		1118	PUTBACK;
		1119	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1120	SPAGAIN;
		1121
		1122	if (SvTRUE (ERRSV))
		1123	{
		1124	FREETMPS; LEAVE;
		1125	ERR_ERRSV;
		1126	}
		1127
		1128	SvREFCNT_dec_NN (sv);
		1129	sv = SvREFCNT_inc (POPs);
		1130
		1131	PUTBACK;
		1132
		1133	FREETMPS; LEAVE;
		1134	}
		1135	break;
		1136
		1137	default:
		1138	filter:
		1139	{
		1140	SV *tag_sv = newSVuv (tag);
		1141
		1142	sv = decode_sv (dec);
		1143
		1144	dSP;
		1145	ENTER; SAVETMPS;
		1146	SAVESTACK_POS ();
		1147	PUSHMARK (SP);
		1148	EXTEND (SP, 2);
		1149	PUSHs (tag_sv);
		1150	PUSHs (sv);
		1151
		1152	PUTBACK;
		1153	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1154	SPAGAIN;
		1155
		1156	if (SvTRUE (ERRSV))
		1157	{
		1158	SvREFCNT_dec_NN (tag_sv);
		1159	FREETMPS; LEAVE;
		1160	ERR_ERRSV;
		1161	}
		1162
		1163	if (count)
		1164	{
		1165	SvREFCNT_dec_NN (tag_sv);
		1166	SvREFCNT_dec_NN (sv);
		1167	sv = SvREFCNT_inc_NN (POPs);
		1168	}
		1169	else
		1170	{
		1171	AV *av = newAV ();
		1172	av_push (av, tag_sv);
		1173	av_push (av, sv);
		1174
		1175	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1176	? cbor_tagged_stash
		1177	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1178	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1179	}
		1180
		1181	PUTBACK;
		1182
		1183	FREETMPS; LEAVE;
		1184	}
		1185	break;
		1186	}
		1187
		1188	return sv;
		1189
		1190	fail:
		1191	SvREFCNT_dec (sv);
782	return &PL_sv_undef;	1192	return &PL_sv_undef;
783	}	1193	}
784		1194
785	static SV *	1195	static SV *
786	decode_sv (dec_t *dec)	1196	decode_sv (dec_t *dec)
787	{	1197	{
788	WANT (1);	1198	WANT (1);
789		1199
790	switch (*dec->cur >> 5)	1200	switch (*dec->cur >> MAJOR_SHIFT)
791	{	1201	{
792	case 0: // unsigned int	1202	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
793	//TODO: 64 bit values on 3 2bit perls	1203	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
794	return newSVuv (decode_uint (dec));	1204	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
795	case 1: // negative int	1205	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
796	return newSViv (-1 - (IV)decode_uint (dec));	1206	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
797	case 2: // octet string	1207	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
798	return decode_str (dec, 0);	1208	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
799	case 3: // utf-8 string	1209
800	return decode_str (dec, 1);	1210	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)	1211	switch (*dec->cur++ & MINOR_MASK)
810	{	1212	{
811	case 20:	1213	case SIMPLE_FALSE:
812	#if CBOR_SLOW	1214	#if CBOR_SLOW
813	cbor_false = get_bool ("CBOR::XS::false");	1215	types_false = get_bool ("Types::Serialiser::false");
814	#endif	1216	#endif
815	return newSVsv (cbor_false);	1217	return newSVsv (types_false);
816	case 21:	1218	case SIMPLE_TRUE:
817	#if CBOR_SLOW	1219	#if CBOR_SLOW
818	cbor_true = get_bool ("CBOR::XS::true");	1220	types_true = get_bool ("Types::Serialiser::true");
819	#endif	1221	#endif
820	return newSVsv (cbor_true);	1222	return newSVsv (types_true);
821	case 22:	1223	case SIMPLE_NULL:
822	return newSVsv (&PL_sv_undef);	1224	return newSVsv (&PL_sv_undef);
		1225	case SIMPLE_UNDEF:
		1226	#if CBOR_SLOW
		1227	types_error = get_bool ("Types::Serialiser::error");
		1228	#endif
		1229	return newSVsv (types_error);
823		1230
824	case 25:	1231	case MISC_FLOAT16:
825	// half float
826	abort ();
827	break;	1232	{
		1233	WANT (2);
828		1234
		1235	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
		1236	dec->cur += 2;
		1237
		1238	return newSVnv (ecb_binary16_to_float (fp));
		1239	}
		1240
829	case 26:	1241	case MISC_FLOAT32:
830	{	1242	{
831	uint32_t fp;	1243	uint32_t fp;
832	WANT (4);	1244	WANT (4);
833	memcpy (&fp, dec->cur, 4);	1245	memcpy (&fp, dec->cur, 4);
834	dec->cur += 4;	1246	dec->cur += 4;
…		…
837	fp = ecb_bswap32 (fp);	1249	fp = ecb_bswap32 (fp);
838		1250
839	return newSVnv (ecb_binary32_to_float (fp));	1251	return newSVnv (ecb_binary32_to_float (fp));
840	}	1252	}
841		1253
842	case 27:	1254	case MISC_FLOAT64:
843	{	1255	{
844	uint64_t fp;	1256	uint64_t fp;
845	WANT (8);	1257	WANT (8);
846	memcpy (&fp, dec->cur, 8);	1258	memcpy (&fp, dec->cur, 8);
847	dec->cur += 8;	1259	dec->cur += 8;
…		…
850	fp = ecb_bswap64 (fp);	1262	fp = ecb_bswap64 (fp);
851		1263
852	return newSVnv (ecb_binary64_to_double (fp));	1264	return newSVnv (ecb_binary64_to_double (fp));
853	}	1265	}
854		1266
855	// 0..19 unassigned	1267	// 0..19 unassigned simple
856	// 24 reserved + unassigned (reserved values are not encodable)	1268	// 24 reserved + unassigned simple (reserved values are not encodable)
		1269	// 28-30 unassigned misc
		1270	// 31 break code
857	default:	1271	default:
858	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1272	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
859	}	1273	}
860		1274
861	break;	1275	break;
862	}	1276	}
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		1277
920	fail:	1278	fail:
921	return &PL_sv_undef;	1279	return &PL_sv_undef;
922	}	1280	}
923		1281
924	static SV *	1282	static SV *
925	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1283	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
926	{	1284	{
927	dec_t dec;	1285	dec_t dec = { 0 };
928	SV *sv;	1286	SV *sv;
		1287	STRLEN len;
		1288	char *data = SvPVbyte (string, len);
929		1289
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)	1290	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",	1291	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);	1292	(unsigned long)len, (unsigned long)cbor->max_size);
961	}
962
963	sv_utf8_downgrade (string, 0);
964		1293
965	dec.cbor = *cbor;	1294	dec.cbor = *cbor;
966	dec.cur = (U8 *)SvPVX (string);	1295	dec.cur = (U8 *)data;
967	dec.end = (U8 *)SvEND (string);	1296	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		1297
974	sv = decode_sv (&dec);	1298	sv = decode_sv (&dec);
975		1299
976	if (offset_return)	1300	if (offset_return)
977	*offset_return = dec.cur;	1301	*offset_return = dec.cur;
978		1302
979	if (!(offset_return || !sv))	1303	if (!(offset_return || !sv))
980	{
981	if (*dec.cur && !dec.err)	1304	if (dec.cur != dec.end && !dec.err)
982	{
983	dec.err = "garbage after CBOR object";	1305	dec.err = "garbage after CBOR object";
984	SvREFCNT_dec (sv);	1306
985	sv = 0;	1307	if (dec.err)
		1308	{
		1309	if (dec.shareable)
986	}	1310	{
987	}	1311	// need to break cyclic links, which would all be in shareable
		1312	int i;
		1313	SV **svp;
988		1314
989	if (!sv)	1315	for (i = av_len (dec.shareable) + 1; i--; )
		1316	if ((svp = av_fetch (dec.shareable, i, 0)))
		1317	sv_setsv (*svp, &PL_sv_undef);
		1318	}
		1319
		1320	SvREFCNT_dec_NN (sv);
		1321
		1322	if (dec.err_sv)
		1323	sv_2mortal (dec.err_sv);
		1324
990	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1325	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
		1326	}
991		1327
992	sv = sv_2mortal (sv);	1328	sv = sv_2mortal (sv);
993		1329
994	return sv;	1330	return sv;
995	}	1331	}
996		1332
		1333	/////////////////////////////////////////////////////////////////////////////
		1334	// incremental parser
		1335
		1336	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1337
		1338	// returns 0 for notyet, 1 for success or error
		1339	static int
		1340	incr_parse (CBOR *self, SV *cborstr)
		1341	{
		1342	STRLEN cur;
		1343	SvPV (cborstr, cur);
		1344
		1345	while (ecb_expect_true (self->incr_need <= cur))
		1346	{
		1347	// table of integer count bytes
		1348	static I8 incr_len[MINOR_MASK + 1] = {
		1349	0, 0, 0, 0, 0, 0, 0, 0,
		1350	0, 0, 0, 0, 0, 0, 0, 0,
		1351	0, 0, 0, 0, 0, 0, 0, 0,
		1352	1, 2, 4, 8,-1,-1,-1,-2
		1353	};
		1354
		1355	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1356	U8 m = *p & MINOR_MASK;
		1357	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1358	I8 ilen = incr_len[m];
		1359
		1360	self->incr_need = self->incr_pos + 1;
		1361
		1362	if (ecb_expect_false (ilen < 0))
		1363	{
		1364	if (m != MINOR_INDEF)
		1365	return 1; // error
		1366
		1367	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1368	{
		1369	if (count >= 0)
		1370	return 1; // error
		1371
		1372	count = 1;
		1373	}
		1374	else
		1375	{
		1376	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1377	count = -1;
		1378	}
		1379	}
		1380	else
		1381	{
		1382	self->incr_need += ilen;
		1383	if (ecb_expect_false (self->incr_need > cur))
		1384	return 0;
		1385
		1386	int major = *p >> MAJOR_SHIFT;
		1387
		1388	switch (major)
		1389	{
		1390	case MAJOR_TAG >> MAJOR_SHIFT:
		1391	++count; // tags merely prefix another value
		1392	break;
		1393
		1394	case MAJOR_BYTES >> MAJOR_SHIFT:
		1395	case MAJOR_TEXT >> MAJOR_SHIFT:
		1396	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1397	case MAJOR_MAP >> MAJOR_SHIFT:
		1398	{
		1399	UV len;
		1400
		1401	if (ecb_expect_false (ilen))
		1402	{
		1403	len = 0;
		1404
		1405	do {
		1406	len = (len << 8) | *++p;
		1407	} while (--ilen);
		1408	}
		1409	else
		1410	len = m;
		1411
		1412	switch (major)
		1413	{
		1414	case MAJOR_BYTES >> MAJOR_SHIFT:
		1415	case MAJOR_TEXT >> MAJOR_SHIFT:
		1416	self->incr_need += len;
		1417	if (ecb_expect_false (self->incr_need > cur))
		1418	return 0;
		1419
		1420	break;
		1421
		1422	case MAJOR_MAP >> MAJOR_SHIFT:
		1423	len <<= 1;
		1424	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1425	if (len)
		1426	{
		1427	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1428	count = len + 1;
		1429	}
		1430	break;
		1431	}
		1432	}
		1433	}
		1434	}
		1435
		1436	self->incr_pos = self->incr_need;
		1437
		1438	if (count > 0)
		1439	{
		1440	while (!--count)
		1441	{
		1442	if (!AvFILLp (self->incr_count))
		1443	return 1; // done
		1444
		1445	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1446	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1447	}
		1448
		1449	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1450	}
		1451	}
		1452
		1453	return 0;
		1454	}
		1455
		1456
997	/////////////////////////////////////////////////////////////////////////////	1457	/////////////////////////////////////////////////////////////////////////////
998	// XS interface functions	1458	// XS interface functions
999		1459
1000	MODULE = CBOR::XS PACKAGE = CBOR::XS	1460	MODULE = CBOR::XS PACKAGE = CBOR::XS
1001		1461
1002	BOOT:	1462	BOOT:
1003	{	1463	{
1004	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1464	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1005	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1465	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1006		1466
1007	cbor_true = get_bool ("CBOR::XS::true");	1467	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1008	cbor_false = get_bool ("CBOR::XS::false");	1468	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1469
		1470	types_true = get_bool ("Types::Serialiser::true" );
		1471	types_false = get_bool ("Types::Serialiser::false");
		1472	types_error = get_bool ("Types::Serialiser::error");
		1473
		1474	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1475
		1476	sv_cbor = newSVpv ("CBOR", 0);
		1477	SvREADONLY_on (sv_cbor);
		1478
		1479	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
1009	}	1480	}
1010		1481
1011	PROTOTYPES: DISABLE	1482	PROTOTYPES: DISABLE
1012		1483
1013	void CLONE (...)	1484	void CLONE (...)
1014	CODE:	1485	CODE:
1015	cbor_stash = 0;	1486	cbor_stash = 0;
		1487	cbor_tagged_stash = 0;
		1488	types_error_stash = 0;
1016	cbor_boolean_stash = 0;	1489	types_boolean_stash = 0;
1017		1490
1018	void new (char *klass)	1491	void new (char *klass)
1019	PPCODE:	1492	PPCODE:
1020	{	1493	{
1021	SV *pv = NEWSV (0, sizeof (CBOR));	1494	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1029		1502
1030	void shrink (CBOR *self, int enable = 1)	1503	void shrink (CBOR *self, int enable = 1)
1031	ALIAS:	1504	ALIAS:
1032	shrink = F_SHRINK	1505	shrink = F_SHRINK
1033	allow_unknown = F_ALLOW_UNKNOWN	1506	allow_unknown = F_ALLOW_UNKNOWN
		1507	allow_sharing = F_ALLOW_SHARING
		1508	allow_cycles = F_ALLOW_CYCLES
		1509	forbid_objects = F_FORBID_OBJECTS
		1510	pack_strings = F_PACK_STRINGS
		1511	text_keys = F_TEXT_KEYS
		1512	text_strings = F_TEXT_STRINGS
		1513	validate_utf8 = F_VALIDATE_UTF8
1034	PPCODE:	1514	PPCODE:
1035	{	1515	{
1036	if (enable)	1516	if (enable)
1037	self->flags |= ix;	1517	self->flags |= ix;
1038	else	1518	else
…		…
1043		1523
1044	void get_shrink (CBOR *self)	1524	void get_shrink (CBOR *self)
1045	ALIAS:	1525	ALIAS:
1046	get_shrink = F_SHRINK	1526	get_shrink = F_SHRINK
1047	get_allow_unknown = F_ALLOW_UNKNOWN	1527	get_allow_unknown = F_ALLOW_UNKNOWN
		1528	get_allow_sharing = F_ALLOW_SHARING
		1529	get_allow_cycles = F_ALLOW_CYCLES
		1530	get_forbid_objects = F_FORBID_OBJECTS
		1531	get_pack_strings = F_PACK_STRINGS
		1532	get_text_keys = F_TEXT_KEYS
		1533	get_text_strings = F_TEXT_STRINGS
		1534	get_validate_utf8 = F_VALIDATE_UTF8
1048	PPCODE:	1535	PPCODE:
1049	XPUSHs (boolSV (self->flags & ix));	1536	XPUSHs (boolSV (self->flags & ix));
1050		1537
1051	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1538	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1052	PPCODE:	1539	PPCODE:
…		…
1068	CODE:	1555	CODE:
1069	RETVAL = self->max_size;	1556	RETVAL = self->max_size;
1070	OUTPUT:	1557	OUTPUT:
1071	RETVAL	1558	RETVAL
1072		1559
1073	#if 0 //TODO	1560	void filter (CBOR *self, SV *filter = 0)
1074
1075	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1076	PPCODE:	1561	PPCODE:
1077	{
1078	SvREFCNT_dec (self->cb_object);	1562	SvREFCNT_dec (self->filter);
1079	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1563	self->filter = filter ? newSVsv (filter) : filter;
1080
1081	XPUSHs (ST (0));	1564	XPUSHs (ST (0));
1082	}
1083		1565
1084	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1566	SV *get_filter (CBOR *self)
1085	PPCODE:	1567	CODE:
1086	{	1568	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1087	if (!self->cb_sk_object)	1569	OUTPUT:
1088	self->cb_sk_object = newHV ();	1570	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		1571
1108	void encode (CBOR *self, SV *scalar)	1572	void encode (CBOR *self, SV *scalar)
1109	PPCODE:	1573	PPCODE:
1110	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1574	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1111	XPUSHs (scalar);	1575	XPUSHs (scalar);
…		…
1124	EXTEND (SP, 2);	1588	EXTEND (SP, 2);
1125	PUSHs (sv);	1589	PUSHs (sv);
1126	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1590	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1127	}	1591	}
1128		1592
		1593	void incr_parse (CBOR *self, SV *cborstr)
		1594	ALIAS:
		1595	incr_parse_multiple = 1
		1596	PPCODE:
		1597	{
		1598	if (SvUTF8 (cborstr))
		1599	sv_utf8_downgrade (cborstr, 0);
		1600
		1601	if (!self->incr_count)
		1602	{
		1603	self->incr_count = newAV ();
		1604	self->incr_pos = 0;
		1605	self->incr_need = 1;
		1606
		1607	av_push (self->incr_count, newSViv (1));
		1608	}
		1609
		1610	do
		1611	{
		1612	if (!incr_parse (self, cborstr))
		1613	{
		1614	if (self->incr_need > self->max_size && self->max_size)
		1615	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1616	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1617
		1618	break;
		1619	}
		1620
		1621	SV *sv;
		1622	char *offset;
		1623
		1624	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1625	XPUSHs (sv);
		1626
		1627	sv_chop (cborstr, offset);
		1628
		1629	av_clear (self->incr_count);
		1630	av_push (self->incr_count, newSViv (1));
		1631
		1632	self->incr_pos = 0;
		1633	self->incr_need = self->incr_pos + 1;
		1634	}
		1635	while (ix);
		1636	}
		1637
		1638	void incr_reset (CBOR *self)
		1639	CODE:
		1640	{
		1641	SvREFCNT_dec (self->incr_count);
		1642	self->incr_count = 0;
		1643	}
		1644
1129	void DESTROY (CBOR *self)	1645	void DESTROY (CBOR *self)
1130	CODE:	1646	PPCODE:
1131	SvREFCNT_dec (self->cb_sk_object);	1647	cbor_free (self);
1132	SvREFCNT_dec (self->cb_object);
1133		1648
1134	PROTOTYPES: ENABLE	1649	PROTOTYPES: ENABLE
1135		1650
1136	void encode_cbor (SV *scalar)	1651	void encode_cbor (SV *scalar)
		1652	ALIAS:
		1653	encode_cbor = 0
		1654	encode_cbor_sharing = F_ALLOW_SHARING
1137	PPCODE:	1655	PPCODE:
1138	{	1656	{
1139	CBOR cbor;	1657	CBOR cbor;
1140	cbor_init (&cbor);	1658	cbor_init (&cbor);
		1659	cbor.flags |= ix;
1141	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1660	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1142	XPUSHs (scalar);	1661	XPUSHs (scalar);
1143	}	1662	}
1144		1663
1145	void decode_cbor (SV *cborstr)	1664	void decode_cbor (SV *cborstr)
…		…
1149	cbor_init (&cbor);	1668	cbor_init (&cbor);
1150	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1669	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1151	XPUSHs (cborstr);	1670	XPUSHs (cborstr);
1152	}	1671	}
1153		1672
		1673	#ifdef __AFL_COMPILER
		1674
		1675	void
		1676	afl_init ()
		1677	CODE:
		1678	__AFL_INIT ();
		1679
		1680	int
		1681	afl_loop (unsigned int count = 10000)
		1682	CODE:
		1683	RETVAL = __AFL_LOOP (count);
		1684	OUTPUT:
		1685	RETVAL
		1686
		1687	#endif
		1688

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