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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.2 by root, Sat Oct 26 10:41:12 2013 UTC vs.
Revision 1.55 by root, Fri Nov 25 06:13:16 2016 UTC

…		…
7	#include <stdlib.h>	7	#include <stdlib.h>
8	#include <stdio.h>	8	#include <stdio.h>
9	#include <limits.h>	9	#include <limits.h>
10	#include <float.h>	10	#include <float.h>
11		11
		12	#define ECB_NO_THREADS 1
12	#include "ecb.h"	13	#include "ecb.h"
13		14
14	#if defined(__BORLANDC__) || defined(_MSC_VER)	15	// compatibility with perl <5.18
15	# define snprintf _snprintf // C compilers have this in stdio.h	16	#ifndef HvNAMELEN_get
		17	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
16	#endif	18	#endif
		19	#ifndef HvNAMELEN
		20	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		21	#endif
		22	#ifndef HvNAMEUTF8
		23	# define HvNAMEUTF8(hv) 0
		24	#endif
		25	#ifndef SvREFCNT_dec_NN
		26	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		27	#endif
17		28
		29	// known major and minor types
		30	enum cbor_type
		31	{
		32	MAJOR_SHIFT = 5,
		33	MINOR_MASK = 0x1f,
		34
		35	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		36	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		37	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		38	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		39	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		40	MAJOR_MAP = 5 << MAJOR_SHIFT,
		41	MAJOR_TAG = 6 << MAJOR_SHIFT,
		42	MAJOR_MISC = 7 << MAJOR_SHIFT,
		43
		44	// INT/STRING/ARRAY/MAP subtypes
		45	LENGTH_EXT1 = 24,
		46	LENGTH_EXT2 = 25,
		47	LENGTH_EXT4 = 26,
		48	LENGTH_EXT8 = 27,
		49
		50	// SIMPLE types (effectively MISC subtypes)
		51	SIMPLE_FALSE = 20,
		52	SIMPLE_TRUE = 21,
		53	SIMPLE_NULL = 22,
		54	SIMPLE_UNDEF = 23,
		55
		56	// MISC subtype (unused)
		57	MISC_EXT1 = 24,
		58	MISC_FLOAT16 = 25,
		59	MISC_FLOAT32 = 26,
		60	MISC_FLOAT64 = 27,
		61
		62	// BYTES/TEXT/ARRAY/MAP
		63	MINOR_INDEF = 31,
		64	};
		65
		66	// known tags
		67	enum cbor_tag
		68	{
		69	// extensions
		70	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
		71	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
		72	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
		73	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
		74	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
		75	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
		76	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
		77
		78	// rfc7049
		79	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
		80	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
		81	CBOR_TAG_POS_BIGNUM = 2, // byte string
		82	CBOR_TAG_NEG_BIGNUM = 3, // byte string
		83	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
		84	CBOR_TAG_BIGFLOAT = 5, // array
		85
		86	CBOR_TAG_CONV_B64U = 21, // base64url, any
		87	CBOR_TAG_CONV_B64 = 22, // base64, any
		88	CBOR_TAG_CONV_HEX = 23, // base16, any
		89	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
		90
		91	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
		92	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
		93	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
		94	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
		95	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
		96
		97	CBOR_TAG_MAGIC = 55799, // self-describe cbor
		98	};
		99
18	#define F_SHRINK 0x00000200UL	100	#define F_SHRINK 0x00000001UL
19	#define F_ALLOW_UNKNOWN 0x00002000UL	101	#define F_ALLOW_UNKNOWN 0x00000002UL
		102	#define F_ALLOW_SHARING 0x00000004UL
		103	#define F_ALLOW_CYCLES 0x00000008UL
		104	#define F_PACK_STRINGS 0x00000010UL
		105	#define F_TEXT_KEYS 0x00000020UL
		106	#define F_TEXT_STRINGS 0x00000040UL
		107	#define F_VALIDATE_UTF8 0x00000080UL
20		108
21	#define INIT_SIZE 32 // initial scalar size to be allocated	109	#define INIT_SIZE 32 // initial scalar size to be allocated
22		110
23	#define SB do {	111	#define SB do {
24	#define SE } while (0)	112	#define SE } while (0)
25
26	#if __GNUC__ >= 3
27	# define expect(expr,value) __builtin_expect ((expr), (value))
28	# define INLINE static inline
29	#else
30	# define expect(expr,value) (expr)
31	# define INLINE static
32	#endif
33
34	#define expect_false(expr) expect ((expr) != 0, 0)
35	#define expect_true(expr) expect ((expr) != 0, 1)
36		113
37	#define IN_RANGE_INC(type,val,beg,end) \	114	#define IN_RANGE_INC(type,val,beg,end) \
38	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \	115	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
39	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))	116	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
40		117
…		…
46	#else	123	#else
47	# define CBOR_SLOW 0	124	# define CBOR_SLOW 0
48	# define CBOR_STASH cbor_stash	125	# define CBOR_STASH cbor_stash
49	#endif	126	#endif
50		127
51	static HV *cbor_stash, *cbor_boolean_stash; // CBOR::XS::	128	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
52	static SV *cbor_true, *cbor_false;	129	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
53		130
54	typedef struct {	131	typedef struct {
55	U32 flags;	132	U32 flags;
56	U32 max_depth;	133	U32 max_depth;
57	STRLEN max_size;	134	STRLEN max_size;
		135	SV *filter;
58		136
59	SV *cb_object;	137	// for the incremental parser
60	HV *cb_sk_object;	138	STRLEN incr_pos; // the current offset into the text
		139	STRLEN incr_need; // minimum bytes needed to decode
		140	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
61	} CBOR;	141	} CBOR;
62		142
63	INLINE void	143	ecb_inline void
64	cbor_init (CBOR *cbor)	144	cbor_init (CBOR *cbor)
65	{	145	{
66	Zero (cbor, 1, CBOR);	146	Zero (cbor, 1, CBOR);
67	cbor->max_depth = 512;	147	cbor->max_depth = 512;
68	}	148	}
69		149
		150	ecb_inline void
		151	cbor_free (CBOR *cbor)
		152	{
		153	SvREFCNT_dec (cbor->filter);
		154	SvREFCNT_dec (cbor->incr_count);
		155	}
		156
70	/////////////////////////////////////////////////////////////////////////////	157	/////////////////////////////////////////////////////////////////////////////
71	// utility functions	158	// utility functions
72		159
73	INLINE SV *	160	ecb_inline SV *
74	get_bool (const char *name)	161	get_bool (const char *name)
75	{	162	{
76	SV *sv = get_sv (name, 1);	163	SV *sv = get_sv (name, 1);
77		164
78	SvREADONLY_on (sv);	165	SvREADONLY_on (sv);
79	SvREADONLY_on (SvRV (sv));	166	SvREADONLY_on (SvRV (sv));
80		167
81	return sv;	168	return sv;
82	}	169	}
83		170
84	INLINE void	171	ecb_inline void
85	shrink (SV *sv)	172	shrink (SV *sv)
86	{	173	{
87	sv_utf8_downgrade (sv, 1);	174	sv_utf8_downgrade (sv, 1);
88		175
89	if (SvLEN (sv) > SvCUR (sv) + 1)	176	if (SvLEN (sv) > SvCUR (sv) + 1)
…		…
94	SvPV_renew (sv, SvCUR (sv) + 1);	181	SvPV_renew (sv, SvCUR (sv) + 1);
95	#endif	182	#endif
96	}	183	}
97	}	184	}
98		185
99	/////////////////////////////////////////////////////////////////////////////	186	// minimum length of a string to be registered for stringref
100	// fp hell	187	ecb_inline int
101		188	minimum_string_length (UV idx)
102	//TODO	189	{
		190	return idx > 23
		191	? idx > 0xffU
		192	? idx > 0xffffU
		193	? idx > 0xffffffffU
		194	? 11
		195	: 7
		196	: 5
		197	: 4
		198	: 3;
		199	}
103		200
104	/////////////////////////////////////////////////////////////////////////////	201	/////////////////////////////////////////////////////////////////////////////
105	// encoder	202	// encoder
106		203
107	// structure used for encoding CBOR	204	// structure used for encoding CBOR
…		…
110	char *cur; // SvPVX (sv) + current output position	207	char *cur; // SvPVX (sv) + current output position
111	char *end; // SvEND (sv)	208	char *end; // SvEND (sv)
112	SV *sv; // result scalar	209	SV *sv; // result scalar
113	CBOR cbor;	210	CBOR cbor;
114	U32 depth; // recursion level	211	U32 depth; // recursion level
		212	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		213	UV stringref_idx;
		214	HV *shareable; // ptr => index, or 0
		215	UV shareable_idx;
115	} enc_t;	216	} enc_t;
116		217
117	INLINE void	218	ecb_inline void
118	need (enc_t *enc, STRLEN len)	219	need (enc_t *enc, STRLEN len)
119	{	220	{
120	if (expect_false (enc->cur + len >= enc->end))	221	if (ecb_expect_false (enc->cur + len >= enc->end))
121	{	222	{
122	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	223	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
123	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	224	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
124	enc->cur = SvPVX (enc->sv) + cur;	225	enc->cur = SvPVX (enc->sv) + cur;
125	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	226	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
126	}	227	}
127	}	228	}
128		229
129	INLINE void	230	ecb_inline void
130	encode_ch (enc_t *enc, char ch)	231	encode_ch (enc_t *enc, char ch)
131	{	232	{
132	need (enc, 1);	233	need (enc, 1);
133	*enc->cur++ = ch;	234	*enc->cur++ = ch;
134	}	235	}
…		…
136	static void	237	static void
137	encode_uint (enc_t *enc, int major, UV len)	238	encode_uint (enc_t *enc, int major, UV len)
138	{	239	{
139	need (enc, 9);	240	need (enc, 9);
140		241
141	if (len < 24)	242	if (ecb_expect_true (len < LENGTH_EXT1))
142	*enc->cur++ = major | len;	243	*enc->cur++ = major | len;
143	else if (len < 0x100)	244	else if (ecb_expect_true (len <= 0xffU))
144	{	245	{
145	*enc->cur++ = major | 24;	246	*enc->cur++ = major | LENGTH_EXT1;
146	*enc->cur++ = len;	247	*enc->cur++ = len;
147	}	248	}
148	else if (len < 0x10000)	249	else if (len <= 0xffffU)
149	{	250	{
150	*enc->cur++ = major | 25;	251	*enc->cur++ = major | LENGTH_EXT2;
151	*enc->cur++ = len >> 8;	252	*enc->cur++ = len >> 8;
152	*enc->cur++ = len;	253	*enc->cur++ = len;
153	}	254	}
154	else if (len < 0x100000000)	255	else if (len <= 0xffffffffU)
155	{	256	{
156	*enc->cur++ = major | 26;	257	*enc->cur++ = major | LENGTH_EXT4;
157	*enc->cur++ = len >> 24;	258	*enc->cur++ = len >> 24;
158	*enc->cur++ = len >> 16;	259	*enc->cur++ = len >> 16;
159	*enc->cur++ = len >> 8;	260	*enc->cur++ = len >> 8;
160	*enc->cur++ = len;	261	*enc->cur++ = len;
161	}	262	}
162	else if (len)	263	else
163	{	264	{
164	*enc->cur++ = major | 27;	265	*enc->cur++ = major | LENGTH_EXT8;
165	*enc->cur++ = len >> 56;	266	*enc->cur++ = len >> 56;
166	*enc->cur++ = len >> 48;	267	*enc->cur++ = len >> 48;
167	*enc->cur++ = len >> 40;	268	*enc->cur++ = len >> 40;
168	*enc->cur++ = len >> 32;	269	*enc->cur++ = len >> 32;
169	*enc->cur++ = len >> 24;	270	*enc->cur++ = len >> 24;
…		…
171	*enc->cur++ = len >> 8;	272	*enc->cur++ = len >> 8;
172	*enc->cur++ = len;	273	*enc->cur++ = len;
173	}	274	}
174	}	275	}
175		276
176	static void	277	ecb_inline void
		278	encode_tag (enc_t *enc, UV tag)
		279	{
		280	encode_uint (enc, MAJOR_TAG, tag);
		281	}
		282
		283	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		284	ecb_noinline static void
177	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	285	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
178	{	286	{
179	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	287	STRLEN ulen = len;
		288	U8 *p, *pend = (U8 *)str + len;
		289
		290	for (p = (U8 *)str; p < pend; ++p)
		291	ulen += *p >> 7; // count set high bits
		292
		293	encode_uint (enc, MAJOR_TEXT, ulen);
		294
		295	need (enc, ulen);
		296	for (p = (U8 *)str; p < pend; ++p)
		297	if (*p < 0x80)
		298	*enc->cur++ = *p;
		299	else
		300	{
		301	*enc->cur++ = 0xc0 + (*p >> 6);
		302	*enc->cur++ = 0x80 + (*p & 63);
		303	}
		304	}
		305
		306	ecb_inline void
		307	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		308	{
		309	if (ecb_expect_false (upgrade_utf8))
		310	if (!utf8)
		311	{
		312	encode_str_utf8 (enc, utf8, str, len);
		313	return;
		314	}
		315
		316	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
180	need (enc, len);	317	need (enc, len);
181	memcpy (enc->cur, str, len);	318	memcpy (enc->cur, str, len);
182	enc->cur += len;	319	enc->cur += len;
183	}	320	}
184		321
		322	ecb_inline void
		323	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		324	{
		325	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		326	{
		327	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		328
		329	if (SvOK (*svp))
		330	{
		331	// already registered, use stringref
		332	encode_tag (enc, CBOR_TAG_STRINGREF);
		333	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		334	return;
		335	}
		336	else if (len >= minimum_string_length (enc->stringref_idx))
		337	{
		338	// register only
		339	sv_setuv (*svp, enc->stringref_idx);
		340	++enc->stringref_idx;
		341	}
		342	}
		343
		344	encode_str (enc, upgrade_utf8, utf8, str, len);
		345	}
		346
185	static void encode_sv (enc_t *enc, SV *sv);	347	static void encode_sv (enc_t *enc, SV *sv);
186		348
187	static void	349	static void
188	encode_av (enc_t *enc, AV *av)	350	encode_av (enc_t *enc, AV *av)
189	{	351	{
…		…
192	if (enc->depth >= enc->cbor.max_depth)	354	if (enc->depth >= enc->cbor.max_depth)
193	croak (ERR_NESTING_EXCEEDED);	355	croak (ERR_NESTING_EXCEEDED);
194		356
195	++enc->depth;	357	++enc->depth;
196		358
197	encode_uint (enc, 0x80, len + 1);	359	encode_uint (enc, MAJOR_ARRAY, len + 1);
198		360
		361	if (SvMAGICAL (av))
199	for (i = 0; i <= len; ++i)	362	for (i = 0; i <= len; ++i)
200	{	363	{
201	SV **svp = av_fetch (av, i, 0);	364	SV **svp = av_fetch (av, i, 0);
202	encode_sv (enc, svp ? *svp : &PL_sv_undef);	365	encode_sv (enc, svp ? *svp : &PL_sv_undef);
203	}	366	}
		367	else
		368	for (i = 0; i <= len; ++i)
		369	{
		370	SV *sv = AvARRAY (av)[i];
		371	encode_sv (enc, sv ? sv : &PL_sv_undef);
		372	}
204		373
205	--enc->depth;	374	--enc->depth;
206	}	375	}
207		376
208	static void	377	static void
…		…
217		386
218	int pairs = hv_iterinit (hv);	387	int pairs = hv_iterinit (hv);
219	int mg = SvMAGICAL (hv);	388	int mg = SvMAGICAL (hv);
220		389
221	if (mg)	390	if (mg)
222	encode_ch (enc, 0xa0 | 31);	391	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
223	else	392	else
224	encode_uint (enc, 0xa0, pairs);	393	encode_uint (enc, MAJOR_MAP, pairs);
225		394
226	while ((he = hv_iternext (hv)))	395	while ((he = hv_iternext (hv)))
227	{	396	{
228	if (HeKLEN (he) == HEf_SVKEY)	397	if (HeKLEN (he) == HEf_SVKEY)
229	encode_sv (enc, HeSVKEY (he));	398	encode_sv (enc, HeSVKEY (he));
230	else	399	else
231	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	400	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
232		401
233	encode_sv (enc, expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	402	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
234	}	403	}
235		404
236	if (mg)	405	if (mg)
237	encode_ch (enc, 0xe0 | 31);	406	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
238		407
239	--enc->depth;	408	--enc->depth;
240	}	409	}
241		410
242	// encode objects, arrays and special \0=false and \1=true values.	411	// encode objects, arrays and special \0=false and \1=true values.
243	static void	412	static void
244	encode_rv (enc_t *enc, SV *sv)	413	encode_rv (enc_t *enc, SV *sv)
245	{	414	{
246	svtype svt;
247
248	SvGETMAGIC (sv);	415	SvGETMAGIC (sv);
		416
249	svt = SvTYPE (sv);	417	svtype svt = SvTYPE (sv);
250		418
251	if (expect_false (SvOBJECT (sv)))	419	if (ecb_expect_false (SvOBJECT (sv)))
252	{	420	{
253	HV *stash = !CBOR_SLOW || cbor_boolean_stash	421	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
254	? cbor_boolean_stash	422	? types_boolean_stash
		423	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		424	HV *error_stash = !CBOR_SLOW || types_error_stash
		425	? types_error_stash
		426	: gv_stashpv ("Types::Serialiser::Error", 1);
		427	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		428	? cbor_tagged_stash
255	: gv_stashpv ("CBOR::XS::Boolean", 1);	429	: gv_stashpv ("CBOR::XS::Tagged" , 1);
256		430
257	if (SvSTASH (sv) == stash)	431	HV *stash = SvSTASH (sv);
258	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	432
		433	if (stash == boolean_stash)
		434	{
		435	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		436	return;
		437	}
		438	else if (stash == error_stash)
		439	{
		440	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		441	return;
		442	}
		443	else if (stash == tagged_stash)
		444	{
		445	if (svt != SVt_PVAV)
		446	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		447
		448	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
		449	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		450
		451	return;
		452	}
		453	}
		454
		455	if (ecb_expect_false (SvREFCNT (sv) > 1)
		456	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		457	{
		458	if (!enc->shareable)
		459	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		460
		461	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		462
		463	if (SvOK (*svp))
		464	{
		465	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		466	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		467	return;
		468	}
259	else	469	else
260	{	470	{
261	#if 0 //TODO	471	sv_setuv (*svp, enc->shareable_idx);
262	if (enc->cbor.flags & F_CONV_BLESSED)	472	++enc->shareable_idx;
		473	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		474	}
		475	}
		476
		477	if (ecb_expect_false (SvOBJECT (sv)))
		478	{
		479	HV *stash = SvSTASH (sv);
		480	GV *method;
		481
		482	if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
263	{	483	{
		484	dSP;
		485
		486	ENTER; SAVETMPS;
		487	PUSHMARK (SP);
264	// we re-bless the reference to get overload and other niceties right	488	// we re-bless the reference to get overload and other niceties right
265	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
266
267	if (to_cbor)
268	{
269	dSP;
270
271	ENTER; SAVETMPS; PUSHMARK (SP);
272	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	489	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
273		490
274	// calling with G_SCALAR ensures that we always get a 1 return value
275	PUTBACK;	491	PUTBACK;
		492	// G_SCALAR ensures that return value is 1
276	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	493	call_sv ((SV *)GvCV (method), G_SCALAR);
277	SPAGAIN;	494	SPAGAIN;
278		495
279	// catch this surprisingly common error	496	// catch this surprisingly common error
280	if (SvROK (TOPs) && SvRV (TOPs) == sv)	497	if (SvROK (TOPs) && SvRV (TOPs) == sv)
281	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	498	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
282		499
283	sv = POPs;
284	PUTBACK;
285
286	encode_sv (enc, sv);	500	encode_sv (enc, POPs);
287		501
		502	PUTBACK;
		503
288	FREETMPS; LEAVE;	504	FREETMPS; LEAVE;
289	}
290	else if (enc->cbor.flags & F_ALLOW_BLESSED)
291	encode_str (enc, "null", 4, 0);
292	else
293	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it",
294	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
295	}	505	}
296	else if (enc->cbor.flags & F_ALLOW_BLESSED)	506	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
297	encode_str (enc, "null", 4, 0);	507	{
		508	dSP;
		509
		510	ENTER; SAVETMPS;
		511	SAVESTACK_POS ();
		512	PUSHMARK (SP);
		513	EXTEND (SP, 2);
		514	// we re-bless the reference to get overload and other niceties right
		515	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		516	PUSHs (sv_cbor);
		517
		518	PUTBACK;
		519	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		520	SPAGAIN;
		521
		522	// catch this surprisingly common error
		523	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		524	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		525
		526	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		527	encode_uint (enc, MAJOR_ARRAY, count + 1);
		528	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		529
		530	while (count)
		531	encode_sv (enc, SP[1 - count--]);
		532
		533	PUTBACK;
		534
		535	FREETMPS; LEAVE;
		536	}
298	else	537	else
299	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	538	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
300	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	539	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
301	#endif
302	}
303	}	540	}
304	else if (svt == SVt_PVHV)	541	else if (svt == SVt_PVHV)
305	encode_hv (enc, (HV *)sv);	542	encode_hv (enc, (HV *)sv);
306	else if (svt == SVt_PVAV)	543	else if (svt == SVt_PVAV)
307	encode_av (enc, (AV *)sv);	544	encode_av (enc, (AV *)sv);
308	else if (svt < SVt_PVAV)
309	{
310	STRLEN len = 0;
311	char *pv = svt ? SvPV (sv, len) : 0;
312
313	if (len == 1 && *pv == '1')
314	encode_ch (enc, 0xe0 | 21);
315	else if (len == 1 && *pv == '0')
316	encode_ch (enc, 0xe0 | 20);
317	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
318	encode_ch (enc, 0xe0 | 23);
319	else
320	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
321	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
322	}
323	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
324	encode_ch (enc, 0xe0 | 23);
325	else	545	else
326	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	546	{
327	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	547	encode_tag (enc, CBOR_TAG_INDIRECTION);
		548	encode_sv (enc, sv);
		549	}
328	}	550	}
329		551
330	static void	552	static void
331	encode_nv (enc_t *enc, SV *sv)	553	encode_nv (enc_t *enc, SV *sv)
332	{	554	{
333	double nv = SvNVX (sv);	555	double nv = SvNVX (sv);
334		556
335	need (enc, 9);	557	need (enc, 9);
336		558
337	if (expect_false (nv == (U32)nv))	559	if (ecb_expect_false (nv == (NV)(U32)nv))
338	encode_uint (enc, 0x00, (U32)nv);	560	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
339	//TODO: maybe I32?	561	//TODO: maybe I32?
340	else if (expect_false (nv == (float)nv))	562	else if (ecb_expect_false (nv == (float)nv))
341	{	563	{
342	uint32_t fp = ecb_float_to_binary32 (nv);	564	uint32_t fp = ecb_float_to_binary32 (nv);
343		565
344	*enc->cur++ = 0xe0 | 26;	566	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
345		567
346	if (!ecb_big_endian ())	568	if (!ecb_big_endian ())
347	fp = ecb_bswap32 (fp);	569	fp = ecb_bswap32 (fp);
348		570
349	memcpy (enc->cur, &fp, 4);	571	memcpy (enc->cur, &fp, 4);
…		…
351	}	573	}
352	else	574	else
353	{	575	{
354	uint64_t fp = ecb_double_to_binary64 (nv);	576	uint64_t fp = ecb_double_to_binary64 (nv);
355		577
356	*enc->cur++ = 0xe0 | 27;	578	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
357		579
358	if (!ecb_big_endian ())	580	if (!ecb_big_endian ())
359	fp = ecb_bswap64 (fp);	581	fp = ecb_bswap64 (fp);
360		582
361	memcpy (enc->cur, &fp, 8);	583	memcpy (enc->cur, &fp, 8);
…		…
370		592
371	if (SvPOKp (sv))	593	if (SvPOKp (sv))
372	{	594	{
373	STRLEN len;	595	STRLEN len;
374	char *str = SvPV (sv, len);	596	char *str = SvPV (sv, len);
375	encode_str (enc, SvUTF8 (sv), str, len);	597	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
376	}	598	}
377	else if (SvNOKp (sv))	599	else if (SvNOKp (sv))
378	encode_nv (enc, sv);	600	encode_nv (enc, sv);
379	else if (SvIOKp (sv))	601	else if (SvIOKp (sv))
380	{	602	{
381	if (SvIsUV (sv))	603	if (SvIsUV (sv))
382	encode_uint (enc, 0x00, SvUVX (sv));	604	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
383	else if (SvIVX (sv) >= 0)	605	else if (SvIVX (sv) >= 0)
384	encode_uint (enc, 0x00, SvIVX (sv));	606	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
385	else	607	else
386	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	608	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
387	}	609	}
388	else if (SvROK (sv))	610	else if (SvROK (sv))
389	encode_rv (enc, SvRV (sv));	611	encode_rv (enc, SvRV (sv));
390	else if (!SvOK (sv))	612	else if (!SvOK (sv))
391	encode_ch (enc, 0xe0 | 22);	613	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
392	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	614	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
393	encode_ch (enc, 0xe0 | 23);	615	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
394	else	616	else
395	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	617	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
396	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	618	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
397	}	619	}
398		620
399	static SV *	621	static SV *
400	encode_cbor (SV *scalar, CBOR *cbor)	622	encode_cbor (SV *scalar, CBOR *cbor)
401	{	623	{
402	enc_t enc;	624	enc_t enc = { 0 };
403		625
404	enc.cbor = *cbor;	626	enc.cbor = *cbor;
405	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	627	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
406	enc.cur = SvPVX (enc.sv);	628	enc.cur = SvPVX (enc.sv);
407	enc.end = SvEND (enc.sv);	629	enc.end = SvEND (enc.sv);
408	enc.depth = 0;
409		630
410	SvPOK_only (enc.sv);	631	SvPOK_only (enc.sv);
		632
		633	if (cbor->flags & F_PACK_STRINGS)
		634	{
		635	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		636	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		637	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		638	}
		639
411	encode_sv (&enc, scalar);	640	encode_sv (&enc, scalar);
412		641
413	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	642	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
414	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	643	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
415		644
…		…
429	U8 *end; // end of input string	658	U8 *end; // end of input string
430	const char *err; // parse error, if != 0	659	const char *err; // parse error, if != 0
431	CBOR cbor;	660	CBOR cbor;
432	U32 depth; // recursion depth	661	U32 depth; // recursion depth
433	U32 maxdepth; // recursion depth limit	662	U32 maxdepth; // recursion depth limit
		663	AV *shareable;
		664	AV *stringref;
		665	SV *decode_tagged;
434	} dec_t;	666	} dec_t;
435		667
436	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	668	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE
437		669
438	#define WANT(len) if (expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data");	670	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")
439		671
440	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	672	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)
441	#define DEC_DEC_DEPTH --dec->depth	673	#define DEC_DEC_DEPTH --dec->depth
442		674
443	static UV	675	static UV
444	decode_uint (dec_t *dec)	676	decode_uint (dec_t *dec)
445	{	677	{
446	switch (*dec->cur & 31)	678	U8 m = *dec->cur & MINOR_MASK;
447	{	679	++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		680
453	case 24:	681	if (ecb_expect_true (m < LENGTH_EXT1))
		682	return m;
		683	else if (ecb_expect_true (m == LENGTH_EXT1))
		684	{
454	WANT (2);	685	WANT (1);
455	dec->cur += 2;	686	dec->cur += 1;
456	return dec->cur[-1];	687	return dec->cur[-1];
457		688	}
458	case 25:	689	else if (ecb_expect_true (m == LENGTH_EXT2))
		690	{
459	WANT (3);	691	WANT (2);
460	dec->cur += 3;	692	dec->cur += 2;
461	return (((UV)dec->cur[-2]) << 8)	693	return (((UV)dec->cur[-2]) << 8)
462	| ((UV)dec->cur[-1]);	694	| ((UV)dec->cur[-1]);
463		695	}
464	case 26:	696	else if (ecb_expect_true (m == LENGTH_EXT4))
		697	{
465	WANT (5);	698	WANT (4);
466	dec->cur += 5;	699	dec->cur += 4;
467	return (((UV)dec->cur[-4]) << 24)	700	return (((UV)dec->cur[-4]) << 24)
468	| (((UV)dec->cur[-3]) << 16)	701	| (((UV)dec->cur[-3]) << 16)
469	| (((UV)dec->cur[-2]) << 8)	702	| (((UV)dec->cur[-2]) << 8)
470	| ((UV)dec->cur[-1]);	703	| ((UV)dec->cur[-1]);
471		704	}
472	case 27:	705	else if (ecb_expect_true (m == LENGTH_EXT8))
		706	{
473	WANT (9);	707	WANT (8);
474	dec->cur += 9;	708	dec->cur += 8;
		709
		710	return
		711	#if UVSIZE < 8
		712	0
		713	#else
475	return (((UV)dec->cur[-8]) << 56)	714	(((UV)dec->cur[-8]) << 56)
476	| (((UV)dec->cur[-7]) << 48)	715	| (((UV)dec->cur[-7]) << 48)
477	| (((UV)dec->cur[-6]) << 40)	716	| (((UV)dec->cur[-6]) << 40)
478	| (((UV)dec->cur[-5]) << 32)	717	| (((UV)dec->cur[-5]) << 32)
		718	#endif
479	| (((UV)dec->cur[-4]) << 24)	719	| (((UV)dec->cur[-4]) << 24)
480	| (((UV)dec->cur[-3]) << 16)	720	| (((UV)dec->cur[-3]) << 16)
481	| (((UV)dec->cur[-2]) << 8)	721	| (((UV)dec->cur[-2]) << 8)
482	| ((UV)dec->cur[-1]);	722	| ((UV)dec->cur[-1]);
483		723	}
484	default:	724	else
485	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	725	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
486	}
487		726
488	fail:	727	fail:
489	return 0;	728	return 0;
490	}	729	}
491		730
…		…
496	{	735	{
497	AV *av = newAV ();	736	AV *av = newAV ();
498		737
499	DEC_INC_DEPTH;	738	DEC_INC_DEPTH;
500		739
501	if ((*dec->cur & 31) == 31)	740	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
502	{	741	{
503	++dec->cur;	742	++dec->cur;
504		743
505	for (;;)	744	for (;;)
506	{	745	{
507	WANT (1);	746	WANT (1);
508		747
509	if (*dec->cur == (0xe0 | 31))	748	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
510	{	749	{
511	++dec->cur;	750	++dec->cur;
512	break;	751	break;
513	}	752	}
514		753
…		…
517	}	756	}
518	else	757	else
519	{	758	{
520	int i, len = decode_uint (dec);	759	int i, len = decode_uint (dec);
521		760
		761	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);	762	av_fill (av, len - 1);
523		763
524	for (i = 0; i < len; ++i)	764	for (i = 0; i < len; ++i)
525	AvARRAY (av)[i] = decode_sv (dec);	765	AvARRAY (av)[i] = decode_sv (dec);
526	}	766	}
…		…
532	SvREFCNT_dec (av);	772	SvREFCNT_dec (av);
533	DEC_DEC_DEPTH;	773	DEC_DEC_DEPTH;
534	return &PL_sv_undef;	774	return &PL_sv_undef;
535	}	775	}
536		776
		777	static void
		778	decode_he (dec_t *dec, HV *hv)
		779	{
		780	// for speed reasons, we specialcase single-string
		781	// byte or utf-8 strings as keys, but only when !stringref
		782
		783	if (ecb_expect_true (!dec->stringref))
		784	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		785	{
		786	I32 len = decode_uint (dec);
		787	char *key = (char *)dec->cur;
		788
		789	WANT (len);
		790	dec->cur += len;
		791
		792	hv_store (hv, key, len, decode_sv (dec), 0);
		793
		794	return;
		795	}
		796	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		797	{
		798	I32 len = decode_uint (dec);
		799	char *key = (char *)dec->cur;
		800
		801	WANT (len);
		802	dec->cur += len;
		803
		804	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		805	if (!is_utf8_string (key, len))
		806	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		807
		808	hv_store (hv, key, -len, decode_sv (dec), 0);
		809
		810	return;
		811	}
		812
		813	SV *k = decode_sv (dec);
		814	SV *v = decode_sv (dec);
		815
		816	hv_store_ent (hv, k, v, 0);
		817	SvREFCNT_dec (k);
		818
		819	fail:
		820	;
		821	}
		822
537	static SV *	823	static SV *
538	decode_hv (dec_t *dec)	824	decode_hv (dec_t *dec)
539	{	825	{
540	HV *hv = newHV ();	826	HV *hv = newHV ();
541		827
542	DEC_INC_DEPTH;	828	DEC_INC_DEPTH;
543		829
544	if ((*dec->cur & 31) == 31)	830	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
545	{	831	{
546	++dec->cur;	832	++dec->cur;
547		833
548	for (;;)	834	for (;;)
549	{	835	{
550	WANT (1);	836	WANT (1);
551		837
552	if (*dec->cur == (0xe0 | 31))	838	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
553	{	839	{
554	++dec->cur;	840	++dec->cur;
555	break;	841	break;
556	}	842	}
557		843
558	SV *k = decode_sv (dec);	844	decode_he (dec, hv);
559	SV *v = decode_sv (dec);
560
561	hv_store_ent (hv, k, v, 0);
562	}	845	}
563	}	846	}
564	else	847	else
565	{	848	{
566	int len = decode_uint (dec);	849	int pairs = decode_uint (dec);
567		850
568	while (len--)	851	while (pairs--)
569	{	852	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	}	853	}
576		854
577	DEC_DEC_DEPTH;	855	DEC_DEC_DEPTH;
578	return newRV_noinc ((SV *)hv);	856	return newRV_noinc ((SV *)hv);
579
580	#if 0
581	SV *sv;
582	HV *hv = newHV ();
583
584	DEC_INC_DEPTH;
585	decode_ws (dec);
586
587	for (;;)
588	{
589	// heuristic: assume that
590	// a) decode_str + hv_store_ent are abysmally slow.
591	// b) most hash keys are short, simple ascii text.
592	// => try to "fast-match" such strings to avoid
593	// the overhead of decode_str + hv_store_ent.
594	{
595	SV *value;
596	char *p = dec->cur;
597	char *e = p + 24; // only try up to 24 bytes
598
599	for (;;)
600	{
601	// the >= 0x80 is false on most architectures
602	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
603	{
604	// slow path, back up and use decode_str
605	SV *key = decode_str (dec);
606	if (!key)
607	goto fail;
608
609	decode_ws (dec); EXPECT_CH (':');
610
611	decode_ws (dec);
612	value = decode_sv (dec);
613	if (!value)
614	{
615	SvREFCNT_dec (key);
616	goto fail;
617	}
618
619	hv_store_ent (hv, key, value, 0);
620	SvREFCNT_dec (key);
621
622	break;
623	}
624	else if (*p == '"')
625	{
626	// fast path, got a simple key
627	char *key = dec->cur;
628	int len = p - key;
629	dec->cur = p + 1;
630
631	decode_ws (dec); EXPECT_CH (':');
632
633	decode_ws (dec);
634	value = decode_sv (dec);
635	if (!value)
636	goto fail;
637
638	hv_store (hv, key, len, value, 0);
639
640	break;
641	}
642
643	++p;
644	}
645	}
646
647	decode_ws (dec);
648
649	if (*dec->cur == '}')
650	{
651	++dec->cur;
652	break;
653	}
654
655	if (*dec->cur != ',')
656	ERR (", or } expected while parsing object/hash");
657
658	++dec->cur;
659
660	decode_ws (dec);
661
662	if (*dec->cur == '}' && dec->cbor.flags & F_RELAXED)
663	{
664	++dec->cur;
665	break;
666	}
667	}
668
669	DEC_DEC_DEPTH;
670	sv = newRV_noinc ((SV *)hv);
671
672	// check filter callbacks
673	if (dec->cbor.flags & F_HOOK)
674	{
675	if (dec->cbor.cb_sk_object && HvKEYS (hv) == 1)
676	{
677	HE *cb, *he;
678
679	hv_iterinit (hv);
680	he = hv_iternext (hv);
681	hv_iterinit (hv);
682
683	// the next line creates a mortal sv each time its called.
684	// might want to optimise this for common cases.
685	cb = hv_fetch_ent (dec->cbor.cb_sk_object, hv_iterkeysv (he), 0, 0);
686
687	if (cb)
688	{
689	dSP;
690	int count;
691
692	ENTER; SAVETMPS; PUSHMARK (SP);
693	XPUSHs (HeVAL (he));
694	sv_2mortal (sv);
695
696	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
697
698	if (count == 1)
699	{
700	sv = newSVsv (POPs);
701	FREETMPS; LEAVE;
702	return sv;
703	}
704
705	SvREFCNT_inc (sv);
706	FREETMPS; LEAVE;
707	}
708	}
709
710	if (dec->cbor.cb_object)
711	{
712	dSP;
713	int count;
714
715	ENTER; SAVETMPS; PUSHMARK (SP);
716	XPUSHs (sv_2mortal (sv));
717
718	PUTBACK; count = call_sv (dec->cbor.cb_object, G_ARRAY); SPAGAIN;
719
720	if (count == 1)
721	{
722	sv = newSVsv (POPs);
723	FREETMPS; LEAVE;
724	return sv;
725	}
726
727	SvREFCNT_inc (sv);
728	FREETMPS; LEAVE;
729	}
730	}
731
732	return sv;
733	#endif
734		857
735	fail:	858	fail:
736	SvREFCNT_dec (hv);	859	SvREFCNT_dec (hv);
737	DEC_DEC_DEPTH;	860	DEC_DEC_DEPTH;
738	return &PL_sv_undef;	861	return &PL_sv_undef;
739	}	862	}
740		863
741	static SV *	864	static SV *
742	decode_str (dec_t *dec, int utf8)	865	decode_str (dec_t *dec, int utf8)
743	{	866	{
744	SV *sv;	867	SV *sv = 0;
745		868
746	if ((*dec->cur & 31) == 31)	869	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
747	{	870	{
		871	// indefinite length strings
748	++dec->cur;	872	++dec->cur;
749		873
		874	U8 major = *dec->cur & MAJOR_MISC;
		875
750	sv = newSVpvn ("", 0);	876	sv = newSVpvn ("", 0);
751		877
752	// not very fast, and certainly not robust against illegal input
753	for (;;)	878	for (;;)
754	{	879	{
755	WANT (1);	880	WANT (1);
756		881
757	if (*dec->cur == (0xe0 | 31))	882	if ((*dec->cur - major) > LENGTH_EXT8)
		883	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
758	{	884	{
759	++dec->cur;	885	++dec->cur;
760	break;	886	break;
761	}	887	}
		888	else
		889	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
762		890
763	SV *sv2 = decode_sv (dec);	891	STRLEN len = decode_uint (dec);
764	sv_catsv (sv, sv2);	892
		893	WANT (len);
		894	sv_catpvn (sv, dec->cur, len);
		895	dec->cur += len;
765	}	896	}
766	}	897	}
767	else	898	else
768	{	899	{
769	STRLEN len = decode_uint (dec);	900	STRLEN len = decode_uint (dec);
770		901
771	WANT (len);	902	WANT (len);
772	sv = newSVpvn (dec->cur, len);	903	sv = newSVpvn (dec->cur, len);
773	dec->cur += len;	904	dec->cur += len;
		905
		906	if (ecb_expect_false (dec->stringref)
		907	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		908	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
774	}	909	}
775		910
776	if (utf8)	911	if (utf8)
		912	{
		913	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		914	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		915	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		916
777	SvUTF8_on (sv);	917	SvUTF8_on (sv);
		918	}
778		919
779	return sv;	920	return sv;
780		921
781	fail:	922	fail:
		923	SvREFCNT_dec (sv);
		924	return &PL_sv_undef;
		925	}
		926
		927	static SV *
		928	decode_tagged (dec_t *dec)
		929	{
		930	SV *sv = 0;
		931	UV tag = decode_uint (dec);
		932
		933	WANT (1);
		934
		935	switch (tag)
		936	{
		937	case CBOR_TAG_MAGIC:
		938	sv = decode_sv (dec);
		939	break;
		940
		941	case CBOR_TAG_INDIRECTION:
		942	sv = newRV_noinc (decode_sv (dec));
		943	break;
		944
		945	case CBOR_TAG_STRINGREF_NAMESPACE:
		946	{
		947	// do nmot use SAVETMPS/FREETMPS, as these will
		948	// erase mortalised caches, e.g. "shareable"
		949	ENTER;
		950
		951	SAVESPTR (dec->stringref);
		952	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		953
		954	sv = decode_sv (dec);
		955
		956	LEAVE;
		957	}
		958	break;
		959
		960	case CBOR_TAG_STRINGREF:
		961	{
		962	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		963	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		964
		965	UV idx = decode_uint (dec);
		966
		967	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		968	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		969
		970	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		971	}
		972	break;
		973
		974	case CBOR_TAG_VALUE_SHAREABLE:
		975	{
		976	if (ecb_expect_false (!dec->shareable))
		977	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		978
		979	if (dec->cbor.flags & F_ALLOW_CYCLES)
		980	{
		981	sv = newSV (0);
		982	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		983
		984	SV *osv = decode_sv (dec);
		985	sv_setsv (sv, osv);
		986	SvREFCNT_dec_NN (osv);
		987	}
		988	else
		989	{
		990	av_push (dec->shareable, &PL_sv_undef);
		991	int idx = AvFILLp (dec->shareable);
		992	sv = decode_sv (dec);
		993	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		994	}
		995	}
		996	break;
		997
		998	case CBOR_TAG_VALUE_SHAREDREF:
		999	{
		1000	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1001	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1002
		1003	UV idx = decode_uint (dec);
		1004
		1005	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		1006	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1007
		1008	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1009
		1010	if (sv == &PL_sv_undef)
		1011	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1012	}
		1013	break;
		1014
		1015	case CBOR_TAG_PERL_OBJECT:
		1016	{
		1017	sv = decode_sv (dec);
		1018
		1019	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1020	ERR ("corrupted CBOR data (non-array perl object)");
		1021
		1022	AV *av = (AV *)SvRV (sv);
		1023	int len = av_len (av) + 1;
		1024	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1025
		1026	if (!stash)
		1027	ERR ("cannot decode perl-object (package does not exist)");
		1028
		1029	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1030
		1031	if (!method)
		1032	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1033
		1034	dSP;
		1035
		1036	ENTER; SAVETMPS;
		1037	PUSHMARK (SP);
		1038	EXTEND (SP, len + 1);
		1039	// we re-bless the reference to get overload and other niceties right
		1040	PUSHs (*av_fetch (av, 0, 1));
		1041	PUSHs (sv_cbor);
		1042
		1043	int i;
		1044
		1045	for (i = 1; i < len; ++i)
		1046	PUSHs (*av_fetch (av, i, 1));
		1047
		1048	PUTBACK;
		1049	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1050	SPAGAIN;
		1051
		1052	if (SvTRUE (ERRSV))
		1053	{
		1054	FREETMPS; LEAVE;
		1055	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1056	}
		1057
		1058	SvREFCNT_dec (sv);
		1059	sv = SvREFCNT_inc (POPs);
		1060
		1061	PUTBACK;
		1062
		1063	FREETMPS; LEAVE;
		1064	}
		1065	break;
		1066
		1067	default:
		1068	{
		1069	sv = decode_sv (dec);
		1070
		1071	dSP;
		1072	ENTER; SAVETMPS;
		1073	SAVESTACK_POS ();
		1074	PUSHMARK (SP);
		1075	EXTEND (SP, 2);
		1076	PUSHs (newSVuv (tag));
		1077	PUSHs (sv);
		1078
		1079	PUTBACK;
		1080	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1081	SPAGAIN;
		1082
		1083	if (SvTRUE (ERRSV))
		1084	{
		1085	FREETMPS; LEAVE;
		1086	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1087	}
		1088
		1089	if (count)
		1090	{
		1091	SvREFCNT_dec (sv);
		1092	sv = SvREFCNT_inc (POPs);
		1093	}
		1094	else
		1095	{
		1096	AV *av = newAV ();
		1097	av_push (av, newSVuv (tag));
		1098	av_push (av, sv);
		1099
		1100	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1101	? cbor_tagged_stash
		1102	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1103	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1104	}
		1105
		1106	PUTBACK;
		1107
		1108	FREETMPS; LEAVE;
		1109	}
		1110	break;
		1111	}
		1112
		1113	return sv;
		1114
		1115	fail:
		1116	SvREFCNT_dec (sv);
782	return &PL_sv_undef;	1117	return &PL_sv_undef;
783	}	1118	}
784		1119
785	static SV *	1120	static SV *
786	decode_sv (dec_t *dec)	1121	decode_sv (dec_t *dec)
787	{	1122	{
788	WANT (1);	1123	WANT (1);
789		1124
790	switch (*dec->cur >> 5)	1125	switch (*dec->cur >> MAJOR_SHIFT)
791	{	1126	{
792	case 0: // unsigned int	1127	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
793	//TODO: 64 bit values on 3 2bit perls	1128	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
794	return newSVuv (decode_uint (dec));	1129	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
795	case 1: // negative int	1130	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
796	return newSViv (-1 - (IV)decode_uint (dec));	1131	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
797	case 2: // octet string	1132	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
798	return decode_str (dec, 0);	1133	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
799	case 3: // utf-8 string	1134
800	return decode_str (dec, 1);	1135	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)	1136	switch (*dec->cur++ & MINOR_MASK)
810	{	1137	{
811	case 20:	1138	case SIMPLE_FALSE:
812	#if CBOR_SLOW	1139	#if CBOR_SLOW
813	cbor_false = get_bool ("CBOR::XS::false");	1140	types_false = get_bool ("Types::Serialiser::false");
814	#endif	1141	#endif
815	return newSVsv (cbor_false);	1142	return newSVsv (types_false);
816	case 21:	1143	case SIMPLE_TRUE:
817	#if CBOR_SLOW	1144	#if CBOR_SLOW
818	cbor_true = get_bool ("CBOR::XS::true");	1145	types_true = get_bool ("Types::Serialiser::true");
819	#endif	1146	#endif
820	return newSVsv (cbor_true);	1147	return newSVsv (types_true);
821	case 22:	1148	case SIMPLE_NULL:
822	return newSVsv (&PL_sv_undef);	1149	return newSVsv (&PL_sv_undef);
		1150	case SIMPLE_UNDEF:
		1151	#if CBOR_SLOW
		1152	types_error = get_bool ("Types::Serialiser::error");
		1153	#endif
		1154	return newSVsv (types_error);
823		1155
824	case 25:	1156	case MISC_FLOAT16:
825	{	1157	{
826	WANT (2);	1158	WANT (2);
827		1159
828	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1160	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
829	dec->cur += 2;	1161	dec->cur += 2;
830		1162
831	return newSVnv (ecb_binary16_to_float (fp));	1163	return newSVnv (ecb_binary16_to_float (fp));
832	}	1164	}
833		1165
834	case 26:	1166	case MISC_FLOAT32:
835	{	1167	{
836	uint32_t fp;	1168	uint32_t fp;
837	WANT (4);	1169	WANT (4);
838	memcpy (&fp, dec->cur, 4);	1170	memcpy (&fp, dec->cur, 4);
839	dec->cur += 4;	1171	dec->cur += 4;
…		…
842	fp = ecb_bswap32 (fp);	1174	fp = ecb_bswap32 (fp);
843		1175
844	return newSVnv (ecb_binary32_to_float (fp));	1176	return newSVnv (ecb_binary32_to_float (fp));
845	}	1177	}
846		1178
847	case 27:	1179	case MISC_FLOAT64:
848	{	1180	{
849	uint64_t fp;	1181	uint64_t fp;
850	WANT (8);	1182	WANT (8);
851	memcpy (&fp, dec->cur, 8);	1183	memcpy (&fp, dec->cur, 8);
852	dec->cur += 8;	1184	dec->cur += 8;
…		…
855	fp = ecb_bswap64 (fp);	1187	fp = ecb_bswap64 (fp);
856		1188
857	return newSVnv (ecb_binary64_to_double (fp));	1189	return newSVnv (ecb_binary64_to_double (fp));
858	}	1190	}
859		1191
860	// 0..19 unassigned	1192	// 0..19 unassigned simple
861	// 24 reserved + unassigned (reserved values are not encodable)	1193	// 24 reserved + unassigned simple (reserved values are not encodable)
		1194	// 28-30 unassigned misc
		1195	// 31 break code
862	default:	1196	default:
863	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1197	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
864	}	1198	}
865		1199
866	break;	1200	break;
867	}	1201	}
868	#if 0
869	switch (*dec->cur)
870	{
871	//case '"': ++dec->cur; return decode_str (dec);
872	case '[': ++dec->cur; return decode_av (dec);
873	case '{': ++dec->cur; return decode_hv (dec);
874
875	case '-':
876	case '0': case '1': case '2': case '3': case '4':
877	case '5': case '6': case '7': case '8': case '9':
878	//TODO return decode_num (dec);
879
880	case 't':
881	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
882	{
883	dec->cur += 4;
884	#if CBOR_SLOW
885	cbor_true = get_bool ("CBOR::XS::true");
886	#endif
887	return newSVsv (cbor_true);
888	}
889	else
890	ERR ("'true' expected");
891
892	break;
893
894	case 'f':
895	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
896	{
897	dec->cur += 5;
898	#if CBOR_SLOW
899	cbor_false = get_bool ("CBOR::XS::false");
900	#endif
901	return newSVsv (cbor_false);
902	}
903	else
904	ERR ("'false' expected");
905
906	break;
907
908	case 'n':
909	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
910	{
911	dec->cur += 4;
912	return newSVsv (&PL_sv_undef);
913	}
914	else
915	ERR ("'null' expected");
916
917	break;
918
919	default:
920	ERR ("malformed CBOR string, neither array, object, number, string or atom");
921	break;
922	}
923	#endif
924		1202
925	fail:	1203	fail:
926	return &PL_sv_undef;	1204	return &PL_sv_undef;
927	}	1205	}
928		1206
929	static SV *	1207	static SV *
930	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1208	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
931	{	1209	{
932	dec_t dec;	1210	dec_t dec = { 0 };
933	SV *sv;	1211	SV *sv;
		1212	STRLEN len;
		1213	char *data = SvPVbyte (string, len);
934		1214
935	/* work around bugs in 5.10 where manipulating magic values
936	* makes perl ignore the magic in subsequent accesses.
937	* also make a copy of non-PV values, to get them into a clean
938	* state (SvPV should do that, but it's buggy, see below).
939	*/
940	/*SvGETMAGIC (string);*/
941	if (SvMAGICAL (string) || !SvPOK (string))
942	string = sv_2mortal (newSVsv (string));
943
944	SvUPGRADE (string, SVt_PV);
945
946	/* work around a bug in perl 5.10, which causes SvCUR to fail an
947	* assertion with -DDEBUGGING, although SvCUR is documented to
948	* return the xpv_cur field which certainly exists after upgrading.
949	* according to nicholas clark, calling SvPOK fixes this.
950	* But it doesn't fix it, so try another workaround, call SvPV_nolen
951	* and hope for the best.
952	* Damnit, SvPV_nolen still trips over yet another assertion. This
953	* assertion business is seriously broken, try yet another workaround
954	* for the broken -DDEBUGGING.
955	*/
956	{
957	#ifdef DEBUGGING
958	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
959	#else
960	STRLEN offset = SvCUR (string);
961	#endif
962
963	if (offset > cbor->max_size && cbor->max_size)	1215	if (len > cbor->max_size && cbor->max_size)
964	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1216	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
965	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1217	(unsigned long)len, (unsigned long)cbor->max_size);
966	}
967
968	sv_utf8_downgrade (string, 0);
969		1218
970	dec.cbor = *cbor;	1219	dec.cbor = *cbor;
971	dec.cur = (U8 *)SvPVX (string);	1220	dec.cur = (U8 *)data;
972	dec.end = (U8 *)SvEND (string);	1221	dec.end = (U8 *)data + len;
973	dec.err = 0;
974	dec.depth = 0;
975
976	if (dec.cbor.cb_object || dec.cbor.cb_sk_object)
977	;//TODO dec.cbor.flags |= F_HOOK;
978		1222
979	sv = decode_sv (&dec);	1223	sv = decode_sv (&dec);
980		1224
981	if (offset_return)	1225	if (offset_return)
982	*offset_return = dec.cur;	1226	*offset_return = dec.cur;
…		…
985	if (dec.cur != dec.end && !dec.err)	1229	if (dec.cur != dec.end && !dec.err)
986	dec.err = "garbage after CBOR object";	1230	dec.err = "garbage after CBOR object";
987		1231
988	if (dec.err)	1232	if (dec.err)
989	{	1233	{
		1234	if (dec.shareable)
		1235	{
		1236	// need to break cyclic links, which whould all be in shareable
		1237	int i;
		1238	SV **svp;
		1239
		1240	for (i = av_len (dec.shareable) + 1; i--; )
		1241	if ((svp = av_fetch (dec.shareable, i, 0)))
		1242	sv_setsv (*svp, &PL_sv_undef);
		1243	}
		1244
990	SvREFCNT_dec (sv);	1245	SvREFCNT_dec (sv);
991	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1246	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
992	}	1247	}
993		1248
994	sv = sv_2mortal (sv);	1249	sv = sv_2mortal (sv);
995		1250
996	return sv;	1251	return sv;
997	}	1252	}
998		1253
		1254	/////////////////////////////////////////////////////////////////////////////
		1255	// incremental parser
		1256
		1257	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1258
		1259	// returns 0 for notyet, 1 for success or error
		1260	static int
		1261	incr_parse (CBOR *self, SV *cborstr)
		1262	{
		1263	STRLEN cur;
		1264	SvPV (cborstr, cur);
		1265
		1266	while (ecb_expect_true (self->incr_need <= cur))
		1267	{
		1268	// table of integer count bytes
		1269	static I8 incr_len[MINOR_MASK + 1] = {
		1270	0, 0, 0, 0, 0, 0, 0, 0,
		1271	0, 0, 0, 0, 0, 0, 0, 0,
		1272	0, 0, 0, 0, 0, 0, 0, 0,
		1273	1, 2, 4, 8,-1,-1,-1,-2
		1274	};
		1275
		1276	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1277	U8 m = *p & MINOR_MASK;
		1278	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1279	I8 ilen = incr_len[m];
		1280
		1281	self->incr_need = self->incr_pos + 1;
		1282
		1283	if (ecb_expect_false (ilen < 0))
		1284	{
		1285	if (m != MINOR_INDEF)
		1286	return 1; // error
		1287
		1288	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1289	{
		1290	if (count >= 0)
		1291	return 1; // error
		1292
		1293	count = 1;
		1294	}
		1295	else
		1296	{
		1297	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1298	count = -1;
		1299	}
		1300	}
		1301	else
		1302	{
		1303	self->incr_need += ilen;
		1304	if (ecb_expect_false (self->incr_need > cur))
		1305	return 0;
		1306
		1307	int major = *p >> MAJOR_SHIFT;
		1308
		1309	switch (major)
		1310	{
		1311	case MAJOR_TAG >> MAJOR_SHIFT:
		1312	++count; // tags merely prefix another value
		1313	break;
		1314
		1315	case MAJOR_BYTES >> MAJOR_SHIFT:
		1316	case MAJOR_TEXT >> MAJOR_SHIFT:
		1317	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1318	case MAJOR_MAP >> MAJOR_SHIFT:
		1319	{
		1320	UV len;
		1321
		1322	if (ecb_expect_false (ilen))
		1323	{
		1324	len = 0;
		1325
		1326	do {
		1327	len = (len << 8) | *++p;
		1328	} while (--ilen);
		1329	}
		1330	else
		1331	len = m;
		1332
		1333	switch (major)
		1334	{
		1335	case MAJOR_BYTES >> MAJOR_SHIFT:
		1336	case MAJOR_TEXT >> MAJOR_SHIFT:
		1337	self->incr_need += len;
		1338	if (ecb_expect_false (self->incr_need > cur))
		1339	return 0;
		1340
		1341	break;
		1342
		1343	case MAJOR_MAP >> MAJOR_SHIFT:
		1344	len <<= 1;
		1345	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1346	if (len)
		1347	{
		1348	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1349	count = len + 1;
		1350	}
		1351	break;
		1352	}
		1353	}
		1354	}
		1355	}
		1356
		1357	self->incr_pos = self->incr_need;
		1358
		1359	if (count > 0)
		1360	{
		1361	while (!--count)
		1362	{
		1363	if (!AvFILLp (self->incr_count))
		1364	return 1; // done
		1365
		1366	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1367	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1368	}
		1369
		1370	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1371	}
		1372	}
		1373
		1374	return 0;
		1375	}
		1376
		1377
999	/////////////////////////////////////////////////////////////////////////////	1378	/////////////////////////////////////////////////////////////////////////////
1000	// XS interface functions	1379	// XS interface functions
1001		1380
1002	MODULE = CBOR::XS PACKAGE = CBOR::XS	1381	MODULE = CBOR::XS PACKAGE = CBOR::XS
1003		1382
1004	BOOT:	1383	BOOT:
1005	{	1384	{
1006	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1385	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1007	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1386	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1008		1387
1009	cbor_true = get_bool ("CBOR::XS::true");	1388	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1010	cbor_false = get_bool ("CBOR::XS::false");	1389	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1390
		1391	types_true = get_bool ("Types::Serialiser::true" );
		1392	types_false = get_bool ("Types::Serialiser::false");
		1393	types_error = get_bool ("Types::Serialiser::error");
		1394
		1395	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1396
		1397	sv_cbor = newSVpv ("CBOR", 0);
		1398	SvREADONLY_on (sv_cbor);
1011	}	1399	}
1012		1400
1013	PROTOTYPES: DISABLE	1401	PROTOTYPES: DISABLE
1014		1402
1015	void CLONE (...)	1403	void CLONE (...)
1016	CODE:	1404	CODE:
1017	cbor_stash = 0;	1405	cbor_stash = 0;
		1406	cbor_tagged_stash = 0;
		1407	types_error_stash = 0;
1018	cbor_boolean_stash = 0;	1408	types_boolean_stash = 0;
1019		1409
1020	void new (char *klass)	1410	void new (char *klass)
1021	PPCODE:	1411	PPCODE:
1022	{	1412	{
1023	SV *pv = NEWSV (0, sizeof (CBOR));	1413	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1031		1421
1032	void shrink (CBOR *self, int enable = 1)	1422	void shrink (CBOR *self, int enable = 1)
1033	ALIAS:	1423	ALIAS:
1034	shrink = F_SHRINK	1424	shrink = F_SHRINK
1035	allow_unknown = F_ALLOW_UNKNOWN	1425	allow_unknown = F_ALLOW_UNKNOWN
		1426	allow_sharing = F_ALLOW_SHARING
		1427	allow_cycles = F_ALLOW_CYCLES
		1428	pack_strings = F_PACK_STRINGS
		1429	text_keys = F_TEXT_KEYS
		1430	text_strings = F_TEXT_STRINGS
		1431	validate_utf8 = F_VALIDATE_UTF8
1036	PPCODE:	1432	PPCODE:
1037	{	1433	{
1038	if (enable)	1434	if (enable)
1039	self->flags |= ix;	1435	self->flags |= ix;
1040	else	1436	else
…		…
1045		1441
1046	void get_shrink (CBOR *self)	1442	void get_shrink (CBOR *self)
1047	ALIAS:	1443	ALIAS:
1048	get_shrink = F_SHRINK	1444	get_shrink = F_SHRINK
1049	get_allow_unknown = F_ALLOW_UNKNOWN	1445	get_allow_unknown = F_ALLOW_UNKNOWN
		1446	get_allow_sharing = F_ALLOW_SHARING
		1447	get_allow_cycles = F_ALLOW_CYCLES
		1448	get_pack_strings = F_PACK_STRINGS
		1449	get_text_keys = F_TEXT_KEYS
		1450	get_text_strings = F_TEXT_STRINGS
		1451	get_validate_utf8 = F_VALIDATE_UTF8
1050	PPCODE:	1452	PPCODE:
1051	XPUSHs (boolSV (self->flags & ix));	1453	XPUSHs (boolSV (self->flags & ix));
1052		1454
1053	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1455	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1054	PPCODE:	1456	PPCODE:
…		…
1070	CODE:	1472	CODE:
1071	RETVAL = self->max_size;	1473	RETVAL = self->max_size;
1072	OUTPUT:	1474	OUTPUT:
1073	RETVAL	1475	RETVAL
1074		1476
1075	#if 0 //TODO	1477	void filter (CBOR *self, SV *filter = 0)
1076
1077	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1078	PPCODE:	1478	PPCODE:
1079	{
1080	SvREFCNT_dec (self->cb_object);	1479	SvREFCNT_dec (self->filter);
1081	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1480	self->filter = filter ? newSVsv (filter) : filter;
1082
1083	XPUSHs (ST (0));	1481	XPUSHs (ST (0));
1084	}
1085		1482
1086	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1483	SV *get_filter (CBOR *self)
1087	PPCODE:	1484	CODE:
1088	{	1485	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1089	if (!self->cb_sk_object)	1486	OUTPUT:
1090	self->cb_sk_object = newHV ();	1487	RETVAL
1091
1092	if (SvOK (cb))
1093	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1094	else
1095	{
1096	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1097
1098	if (!HvKEYS (self->cb_sk_object))
1099	{
1100	SvREFCNT_dec (self->cb_sk_object);
1101	self->cb_sk_object = 0;
1102	}
1103	}
1104
1105	XPUSHs (ST (0));
1106	}
1107
1108	#endif
1109		1488
1110	void encode (CBOR *self, SV *scalar)	1489	void encode (CBOR *self, SV *scalar)
1111	PPCODE:	1490	PPCODE:
1112	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1491	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1113	XPUSHs (scalar);	1492	XPUSHs (scalar);
…		…
1126	EXTEND (SP, 2);	1505	EXTEND (SP, 2);
1127	PUSHs (sv);	1506	PUSHs (sv);
1128	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1507	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1129	}	1508	}
1130		1509
		1510	void incr_parse (CBOR *self, SV *cborstr)
		1511	ALIAS:
		1512	incr_parse_multiple = 1
		1513	PPCODE:
		1514	{
		1515	if (SvUTF8 (cborstr))
		1516	sv_utf8_downgrade (cborstr, 0);
		1517
		1518	if (!self->incr_count)
		1519	{
		1520	self->incr_count = newAV ();
		1521	self->incr_pos = 0;
		1522	self->incr_need = 1;
		1523
		1524	av_push (self->incr_count, newSViv (1));
		1525	}
		1526
		1527	do
		1528	{
		1529	if (!incr_parse (self, cborstr))
		1530	{
		1531	if (self->incr_need > self->max_size && self->max_size)
		1532	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1533	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1534
		1535	break;
		1536	}
		1537
		1538	SV *sv;
		1539	char *offset;
		1540
		1541	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1542	XPUSHs (sv);
		1543
		1544	sv_chop (cborstr, offset);
		1545
		1546	av_clear (self->incr_count);
		1547	av_push (self->incr_count, newSViv (1));
		1548
		1549	self->incr_pos = 0;
		1550	self->incr_need = self->incr_pos + 1;
		1551	}
		1552	while (ix);
		1553	}
		1554
		1555	void incr_reset (CBOR *self)
		1556	CODE:
		1557	{
		1558	SvREFCNT_dec (self->incr_count);
		1559	self->incr_count = 0;
		1560	}
		1561
1131	void DESTROY (CBOR *self)	1562	void DESTROY (CBOR *self)
1132	CODE:	1563	PPCODE:
1133	SvREFCNT_dec (self->cb_sk_object);	1564	cbor_free (self);
1134	SvREFCNT_dec (self->cb_object);
1135		1565
1136	PROTOTYPES: ENABLE	1566	PROTOTYPES: ENABLE
1137		1567
1138	void encode_cbor (SV *scalar)	1568	void encode_cbor (SV *scalar)
		1569	ALIAS:
		1570	encode_cbor = 0
		1571	encode_cbor_sharing = F_ALLOW_SHARING
1139	PPCODE:	1572	PPCODE:
1140	{	1573	{
1141	CBOR cbor;	1574	CBOR cbor;
1142	cbor_init (&cbor);	1575	cbor_init (&cbor);
		1576	cbor.flags |= ix;
1143	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1577	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1144	XPUSHs (scalar);	1578	XPUSHs (scalar);
1145	}	1579	}
1146		1580
1147	void decode_cbor (SV *cborstr)	1581	void decode_cbor (SV *cborstr)

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