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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 1.57 by root, Fri Nov 25 12:16:12 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 ((UV)(dec->end - dec->cur) < (UV)len)) 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 (ecb_expect_false (++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
515	av_push (av, decode_sv (dec));	754	av_push (av, decode_sv (dec));
516	}	755	}
517	}	756	}
518	else	757	else
519	{	758	{
520	int i, len = decode_uint (dec);	759	UV 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	STRLEN 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	STRLEN 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	UV pairs = decode_uint (dec);
567		850
		851	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		852
568	while (len--)	853	while (pairs--)
569	{	854	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	}	855	}
576		856
577	DEC_DEC_DEPTH;	857	DEC_DEC_DEPTH;
578	return newRV_noinc ((SV *)hv);	858	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		859
735	fail:	860	fail:
736	SvREFCNT_dec (hv);	861	SvREFCNT_dec (hv);
737	DEC_DEC_DEPTH;	862	DEC_DEC_DEPTH;
738	return &PL_sv_undef;	863	return &PL_sv_undef;
739	}	864	}
740		865
741	static SV *	866	static SV *
742	decode_str (dec_t *dec, int utf8)	867	decode_str (dec_t *dec, int utf8)
743	{	868	{
744	SV *sv;	869	SV *sv = 0;
745		870
746	if ((*dec->cur & 31) == 31)	871	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
747	{	872	{
		873	// indefinite length strings
748	++dec->cur;	874	++dec->cur;
749		875
		876	U8 major = *dec->cur & MAJOR_MISC;
		877
750	sv = newSVpvn ("", 0);	878	sv = newSVpvn ("", 0);
751		879
752	// not very fast, and certainly not robust against illegal input
753	for (;;)	880	for (;;)
754	{	881	{
755	WANT (1);	882	WANT (1);
756		883
757	if (*dec->cur == 0xe0 | 31)	884	if ((*dec->cur - major) > LENGTH_EXT8)
		885	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
758	{	886	{
759	++dec->cur;	887	++dec->cur;
760	break;	888	break;
761	}	889	}
		890	else
		891	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
762		892
763	SV *sv2 = decode_sv (dec);	893	STRLEN len = decode_uint (dec);
764	sv_catsv (sv, sv2);	894
		895	WANT (len);
		896	sv_catpvn (sv, dec->cur, len);
		897	dec->cur += len;
765	}	898	}
766	}	899	}
767	else	900	else
768	{	901	{
769	STRLEN len = decode_uint (dec);	902	STRLEN len = decode_uint (dec);
770		903
771	WANT (len);	904	WANT (len);
772	sv = newSVpvn (dec->cur, len);	905	sv = newSVpvn (dec->cur, len);
773	dec->cur += len;	906	dec->cur += len;
		907
		908	if (ecb_expect_false (dec->stringref)
		909	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		910	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
774	}	911	}
775		912
776	if (utf8)	913	if (utf8)
		914	{
		915	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		916	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		917	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		918
777	SvUTF8_on (sv);	919	SvUTF8_on (sv);
		920	}
778		921
779	return sv;	922	return sv;
780		923
781	fail:	924	fail:
		925	SvREFCNT_dec (sv);
		926	return &PL_sv_undef;
		927	}
		928
		929	static SV *
		930	decode_tagged (dec_t *dec)
		931	{
		932	SV *sv = 0;
		933	UV tag = decode_uint (dec);
		934
		935	WANT (1);
		936
		937	switch (tag)
		938	{
		939	case CBOR_TAG_MAGIC:
		940	sv = decode_sv (dec);
		941	break;
		942
		943	case CBOR_TAG_INDIRECTION:
		944	sv = newRV_noinc (decode_sv (dec));
		945	break;
		946
		947	case CBOR_TAG_STRINGREF_NAMESPACE:
		948	{
		949	// do nmot use SAVETMPS/FREETMPS, as these will
		950	// erase mortalised caches, e.g. "shareable"
		951	ENTER;
		952
		953	SAVESPTR (dec->stringref);
		954	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		955
		956	sv = decode_sv (dec);
		957
		958	LEAVE;
		959	}
		960	break;
		961
		962	case CBOR_TAG_STRINGREF:
		963	{
		964	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		965	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		966
		967	UV idx = decode_uint (dec);
		968
		969	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		970	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		971
		972	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		973	}
		974	break;
		975
		976	case CBOR_TAG_VALUE_SHAREABLE:
		977	{
		978	if (ecb_expect_false (!dec->shareable))
		979	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		980
		981	if (dec->cbor.flags & F_ALLOW_CYCLES)
		982	{
		983	sv = newSV (0);
		984	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		985
		986	SV *osv = decode_sv (dec);
		987	sv_setsv (sv, osv);
		988	SvREFCNT_dec_NN (osv);
		989	}
		990	else
		991	{
		992	av_push (dec->shareable, &PL_sv_undef);
		993	int idx = AvFILLp (dec->shareable);
		994	sv = decode_sv (dec);
		995	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		996	}
		997	}
		998	break;
		999
		1000	case CBOR_TAG_VALUE_SHAREDREF:
		1001	{
		1002	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1003	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1004
		1005	UV idx = decode_uint (dec);
		1006
		1007	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		1008	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1009
		1010	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1011
		1012	if (sv == &PL_sv_undef)
		1013	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1014	}
		1015	break;
		1016
		1017	case CBOR_TAG_PERL_OBJECT:
		1018	{
		1019	sv = decode_sv (dec);
		1020
		1021	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1022	ERR ("corrupted CBOR data (non-array perl object)");
		1023
		1024	AV *av = (AV *)SvRV (sv);
		1025	int len = av_len (av) + 1;
		1026	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1027
		1028	if (!stash)
		1029	ERR ("cannot decode perl-object (package does not exist)");
		1030
		1031	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1032
		1033	if (!method)
		1034	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1035
		1036	dSP;
		1037
		1038	ENTER; SAVETMPS;
		1039	PUSHMARK (SP);
		1040	EXTEND (SP, len + 1);
		1041	// we re-bless the reference to get overload and other niceties right
		1042	PUSHs (*av_fetch (av, 0, 1));
		1043	PUSHs (sv_cbor);
		1044
		1045	int i;
		1046
		1047	for (i = 1; i < len; ++i)
		1048	PUSHs (*av_fetch (av, i, 1));
		1049
		1050	PUTBACK;
		1051	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1052	SPAGAIN;
		1053
		1054	if (SvTRUE (ERRSV))
		1055	{
		1056	FREETMPS; LEAVE;
		1057	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1058	}
		1059
		1060	SvREFCNT_dec (sv);
		1061	sv = SvREFCNT_inc (POPs);
		1062
		1063	PUTBACK;
		1064
		1065	FREETMPS; LEAVE;
		1066	}
		1067	break;
		1068
		1069	default:
		1070	{
		1071	sv = decode_sv (dec);
		1072
		1073	dSP;
		1074	ENTER; SAVETMPS;
		1075	SAVESTACK_POS ();
		1076	PUSHMARK (SP);
		1077	EXTEND (SP, 2);
		1078	PUSHs (newSVuv (tag));
		1079	PUSHs (sv);
		1080
		1081	PUTBACK;
		1082	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1083	SPAGAIN;
		1084
		1085	if (SvTRUE (ERRSV))
		1086	{
		1087	FREETMPS; LEAVE;
		1088	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1089	}
		1090
		1091	if (count)
		1092	{
		1093	SvREFCNT_dec (sv);
		1094	sv = SvREFCNT_inc (POPs);
		1095	}
		1096	else
		1097	{
		1098	AV *av = newAV ();
		1099	av_push (av, newSVuv (tag));
		1100	av_push (av, sv);
		1101
		1102	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1103	? cbor_tagged_stash
		1104	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1105	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1106	}
		1107
		1108	PUTBACK;
		1109
		1110	FREETMPS; LEAVE;
		1111	}
		1112	break;
		1113	}
		1114
		1115	return sv;
		1116
		1117	fail:
		1118	SvREFCNT_dec (sv);
782	return &PL_sv_undef;	1119	return &PL_sv_undef;
783	}	1120	}
784		1121
785	static SV *	1122	static SV *
786	decode_sv (dec_t *dec)	1123	decode_sv (dec_t *dec)
787	{	1124	{
788	WANT (1);	1125	WANT (1);
789		1126
790	switch (*dec->cur >> 5)	1127	switch (*dec->cur >> MAJOR_SHIFT)
791	{	1128	{
792	case 0: // unsigned int	1129	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
793	//TODO: 64 bit values on 3 2bit perls	1130	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
794	return newSVuv (decode_uint (dec));	1131	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
795	case 1: // negative int	1132	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
796	return newSViv (-1 - (IV)decode_uint (dec));	1133	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
797	case 2: // octet string	1134	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
798	return decode_str (dec, 0);	1135	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
799	case 3: // utf-8 string	1136
800	return decode_str (dec, 1);	1137	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)	1138	switch (*dec->cur++ & MINOR_MASK)
810	{	1139	{
811	case 20:	1140	case SIMPLE_FALSE:
812	#if CBOR_SLOW	1141	#if CBOR_SLOW
813	cbor_false = get_bool ("CBOR::XS::false");	1142	types_false = get_bool ("Types::Serialiser::false");
814	#endif	1143	#endif
815	return newSVsv (cbor_false);	1144	return newSVsv (types_false);
816	case 21:	1145	case SIMPLE_TRUE:
817	#if CBOR_SLOW	1146	#if CBOR_SLOW
818	cbor_true = get_bool ("CBOR::XS::true");	1147	types_true = get_bool ("Types::Serialiser::true");
819	#endif	1148	#endif
820	return newSVsv (cbor_true);	1149	return newSVsv (types_true);
821	case 22:	1150	case SIMPLE_NULL:
822	return newSVsv (&PL_sv_undef);	1151	return newSVsv (&PL_sv_undef);
		1152	case SIMPLE_UNDEF:
		1153	#if CBOR_SLOW
		1154	types_error = get_bool ("Types::Serialiser::error");
		1155	#endif
		1156	return newSVsv (types_error);
823		1157
824	case 25:	1158	case MISC_FLOAT16:
825	// half float
826	abort ();
827	break;	1159	{
		1160	WANT (2);
828		1161
		1162	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
		1163	dec->cur += 2;
		1164
		1165	return newSVnv (ecb_binary16_to_float (fp));
		1166	}
		1167
829	case 26:	1168	case MISC_FLOAT32:
830	{	1169	{
831	uint32_t fp;	1170	uint32_t fp;
832	WANT (4);	1171	WANT (4);
833	memcpy (&fp, dec->cur, 4);	1172	memcpy (&fp, dec->cur, 4);
834	dec->cur += 4;	1173	dec->cur += 4;
…		…
837	fp = ecb_bswap32 (fp);	1176	fp = ecb_bswap32 (fp);
838		1177
839	return newSVnv (ecb_binary32_to_float (fp));	1178	return newSVnv (ecb_binary32_to_float (fp));
840	}	1179	}
841		1180
842	case 27:	1181	case MISC_FLOAT64:
843	{	1182	{
844	uint64_t fp;	1183	uint64_t fp;
845	WANT (8);	1184	WANT (8);
846	memcpy (&fp, dec->cur, 8);	1185	memcpy (&fp, dec->cur, 8);
847	dec->cur += 8;	1186	dec->cur += 8;
…		…
850	fp = ecb_bswap64 (fp);	1189	fp = ecb_bswap64 (fp);
851		1190
852	return newSVnv (ecb_binary64_to_double (fp));	1191	return newSVnv (ecb_binary64_to_double (fp));
853	}	1192	}
854		1193
855	// 0..19 unassigned	1194	// 0..19 unassigned simple
856	// 24 reserved + unassigned (reserved values are not encodable)	1195	// 24 reserved + unassigned simple (reserved values are not encodable)
		1196	// 28-30 unassigned misc
		1197	// 31 break code
857	default:	1198	default:
858	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1199	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
859	}	1200	}
860		1201
861	break;	1202	break;
862	}	1203	}
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		1204
920	fail:	1205	fail:
921	return &PL_sv_undef;	1206	return &PL_sv_undef;
922	}	1207	}
923		1208
924	static SV *	1209	static SV *
925	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1210	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
926	{	1211	{
927	dec_t dec;	1212	dec_t dec = { 0 };
928	SV *sv;	1213	SV *sv;
		1214	STRLEN len;
		1215	char *data = SvPVbyte (string, len);
929		1216
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)	1217	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",	1218	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);	1219	(unsigned long)len, (unsigned long)cbor->max_size);
961	}
962
963	sv_utf8_downgrade (string, 0);
964		1220
965	dec.cbor = *cbor;	1221	dec.cbor = *cbor;
966	dec.cur = (U8 *)SvPVX (string);	1222	dec.cur = (U8 *)data;
967	dec.end = (U8 *)SvEND (string);	1223	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		1224
974	sv = decode_sv (&dec);	1225	sv = decode_sv (&dec);
975		1226
976	if (offset_return)	1227	if (offset_return)
977	*offset_return = dec.cur;	1228	*offset_return = dec.cur;
978		1229
979	if (!(offset_return || !sv))	1230	if (!(offset_return || !sv))
980	{
981	if (*dec.cur && !dec.err)	1231	if (dec.cur != dec.end && !dec.err)
982	{
983	dec.err = "garbage after CBOR object";	1232	dec.err = "garbage after CBOR object";
		1233
		1234	if (dec.err)
		1235	{
		1236	if (dec.shareable)
		1237	{
		1238	// need to break cyclic links, which whould all be in shareable
		1239	int i;
		1240	SV **svp;
		1241
		1242	for (i = av_len (dec.shareable) + 1; i--; )
		1243	if ((svp = av_fetch (dec.shareable, i, 0)))
		1244	sv_setsv (*svp, &PL_sv_undef);
		1245	}
		1246
984	SvREFCNT_dec (sv);	1247	SvREFCNT_dec (sv);
985	sv = 0;
986	}
987	}
988
989	if (!sv)
990	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1248	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
		1249	}
991		1250
992	sv = sv_2mortal (sv);	1251	sv = sv_2mortal (sv);
993		1252
994	return sv;	1253	return sv;
995	}	1254	}
996		1255
		1256	/////////////////////////////////////////////////////////////////////////////
		1257	// incremental parser
		1258
		1259	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1260
		1261	// returns 0 for notyet, 1 for success or error
		1262	static int
		1263	incr_parse (CBOR *self, SV *cborstr)
		1264	{
		1265	STRLEN cur;
		1266	SvPV (cborstr, cur);
		1267
		1268	while (ecb_expect_true (self->incr_need <= cur))
		1269	{
		1270	// table of integer count bytes
		1271	static I8 incr_len[MINOR_MASK + 1] = {
		1272	0, 0, 0, 0, 0, 0, 0, 0,
		1273	0, 0, 0, 0, 0, 0, 0, 0,
		1274	0, 0, 0, 0, 0, 0, 0, 0,
		1275	1, 2, 4, 8,-1,-1,-1,-2
		1276	};
		1277
		1278	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1279	U8 m = *p & MINOR_MASK;
		1280	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1281	I8 ilen = incr_len[m];
		1282
		1283	self->incr_need = self->incr_pos + 1;
		1284
		1285	if (ecb_expect_false (ilen < 0))
		1286	{
		1287	if (m != MINOR_INDEF)
		1288	return 1; // error
		1289
		1290	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1291	{
		1292	if (count >= 0)
		1293	return 1; // error
		1294
		1295	count = 1;
		1296	}
		1297	else
		1298	{
		1299	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1300	count = -1;
		1301	}
		1302	}
		1303	else
		1304	{
		1305	self->incr_need += ilen;
		1306	if (ecb_expect_false (self->incr_need > cur))
		1307	return 0;
		1308
		1309	int major = *p >> MAJOR_SHIFT;
		1310
		1311	switch (major)
		1312	{
		1313	case MAJOR_TAG >> MAJOR_SHIFT:
		1314	++count; // tags merely prefix another value
		1315	break;
		1316
		1317	case MAJOR_BYTES >> MAJOR_SHIFT:
		1318	case MAJOR_TEXT >> MAJOR_SHIFT:
		1319	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1320	case MAJOR_MAP >> MAJOR_SHIFT:
		1321	{
		1322	UV len;
		1323
		1324	if (ecb_expect_false (ilen))
		1325	{
		1326	len = 0;
		1327
		1328	do {
		1329	len = (len << 8) | *++p;
		1330	} while (--ilen);
		1331	}
		1332	else
		1333	len = m;
		1334
		1335	switch (major)
		1336	{
		1337	case MAJOR_BYTES >> MAJOR_SHIFT:
		1338	case MAJOR_TEXT >> MAJOR_SHIFT:
		1339	self->incr_need += len;
		1340	if (ecb_expect_false (self->incr_need > cur))
		1341	return 0;
		1342
		1343	break;
		1344
		1345	case MAJOR_MAP >> MAJOR_SHIFT:
		1346	len <<= 1;
		1347	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1348	if (len)
		1349	{
		1350	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1351	count = len + 1;
		1352	}
		1353	break;
		1354	}
		1355	}
		1356	}
		1357	}
		1358
		1359	self->incr_pos = self->incr_need;
		1360
		1361	if (count > 0)
		1362	{
		1363	while (!--count)
		1364	{
		1365	if (!AvFILLp (self->incr_count))
		1366	return 1; // done
		1367
		1368	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1369	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1370	}
		1371
		1372	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1373	}
		1374	}
		1375
		1376	return 0;
		1377	}
		1378
		1379
997	/////////////////////////////////////////////////////////////////////////////	1380	/////////////////////////////////////////////////////////////////////////////
998	// XS interface functions	1381	// XS interface functions
999		1382
1000	MODULE = CBOR::XS PACKAGE = CBOR::XS	1383	MODULE = CBOR::XS PACKAGE = CBOR::XS
1001		1384
1002	BOOT:	1385	BOOT:
1003	{	1386	{
1004	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1387	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1005	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1388	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1006		1389
1007	cbor_true = get_bool ("CBOR::XS::true");	1390	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1008	cbor_false = get_bool ("CBOR::XS::false");	1391	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1392
		1393	types_true = get_bool ("Types::Serialiser::true" );
		1394	types_false = get_bool ("Types::Serialiser::false");
		1395	types_error = get_bool ("Types::Serialiser::error");
		1396
		1397	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1398
		1399	sv_cbor = newSVpv ("CBOR", 0);
		1400	SvREADONLY_on (sv_cbor);
		1401
		1402	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
1009	}	1403	}
1010		1404
1011	PROTOTYPES: DISABLE	1405	PROTOTYPES: DISABLE
1012		1406
1013	void CLONE (...)	1407	void CLONE (...)
1014	CODE:	1408	CODE:
1015	cbor_stash = 0;	1409	cbor_stash = 0;
		1410	cbor_tagged_stash = 0;
		1411	types_error_stash = 0;
1016	cbor_boolean_stash = 0;	1412	types_boolean_stash = 0;
1017		1413
1018	void new (char *klass)	1414	void new (char *klass)
1019	PPCODE:	1415	PPCODE:
1020	{	1416	{
1021	SV *pv = NEWSV (0, sizeof (CBOR));	1417	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1029		1425
1030	void shrink (CBOR *self, int enable = 1)	1426	void shrink (CBOR *self, int enable = 1)
1031	ALIAS:	1427	ALIAS:
1032	shrink = F_SHRINK	1428	shrink = F_SHRINK
1033	allow_unknown = F_ALLOW_UNKNOWN	1429	allow_unknown = F_ALLOW_UNKNOWN
		1430	allow_sharing = F_ALLOW_SHARING
		1431	allow_cycles = F_ALLOW_CYCLES
		1432	pack_strings = F_PACK_STRINGS
		1433	text_keys = F_TEXT_KEYS
		1434	text_strings = F_TEXT_STRINGS
		1435	validate_utf8 = F_VALIDATE_UTF8
1034	PPCODE:	1436	PPCODE:
1035	{	1437	{
1036	if (enable)	1438	if (enable)
1037	self->flags |= ix;	1439	self->flags |= ix;
1038	else	1440	else
…		…
1043		1445
1044	void get_shrink (CBOR *self)	1446	void get_shrink (CBOR *self)
1045	ALIAS:	1447	ALIAS:
1046	get_shrink = F_SHRINK	1448	get_shrink = F_SHRINK
1047	get_allow_unknown = F_ALLOW_UNKNOWN	1449	get_allow_unknown = F_ALLOW_UNKNOWN
		1450	get_allow_sharing = F_ALLOW_SHARING
		1451	get_allow_cycles = F_ALLOW_CYCLES
		1452	get_pack_strings = F_PACK_STRINGS
		1453	get_text_keys = F_TEXT_KEYS
		1454	get_text_strings = F_TEXT_STRINGS
		1455	get_validate_utf8 = F_VALIDATE_UTF8
1048	PPCODE:	1456	PPCODE:
1049	XPUSHs (boolSV (self->flags & ix));	1457	XPUSHs (boolSV (self->flags & ix));
1050		1458
1051	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1459	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1052	PPCODE:	1460	PPCODE:
…		…
1068	CODE:	1476	CODE:
1069	RETVAL = self->max_size;	1477	RETVAL = self->max_size;
1070	OUTPUT:	1478	OUTPUT:
1071	RETVAL	1479	RETVAL
1072		1480
1073	#if 0 //TODO	1481	void filter (CBOR *self, SV *filter = 0)
1074
1075	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1076	PPCODE:	1482	PPCODE:
1077	{
1078	SvREFCNT_dec (self->cb_object);	1483	SvREFCNT_dec (self->filter);
1079	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1484	self->filter = filter ? newSVsv (filter) : filter;
1080
1081	XPUSHs (ST (0));	1485	XPUSHs (ST (0));
1082	}
1083		1486
1084	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1487	SV *get_filter (CBOR *self)
1085	PPCODE:	1488	CODE:
1086	{	1489	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1087	if (!self->cb_sk_object)	1490	OUTPUT:
1088	self->cb_sk_object = newHV ();	1491	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		1492
1108	void encode (CBOR *self, SV *scalar)	1493	void encode (CBOR *self, SV *scalar)
1109	PPCODE:	1494	PPCODE:
1110	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1495	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1111	XPUSHs (scalar);	1496	XPUSHs (scalar);
…		…
1124	EXTEND (SP, 2);	1509	EXTEND (SP, 2);
1125	PUSHs (sv);	1510	PUSHs (sv);
1126	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1511	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1127	}	1512	}
1128		1513
		1514	void incr_parse (CBOR *self, SV *cborstr)
		1515	ALIAS:
		1516	incr_parse_multiple = 1
		1517	PPCODE:
		1518	{
		1519	if (SvUTF8 (cborstr))
		1520	sv_utf8_downgrade (cborstr, 0);
		1521
		1522	if (!self->incr_count)
		1523	{
		1524	self->incr_count = newAV ();
		1525	self->incr_pos = 0;
		1526	self->incr_need = 1;
		1527
		1528	av_push (self->incr_count, newSViv (1));
		1529	}
		1530
		1531	do
		1532	{
		1533	if (!incr_parse (self, cborstr))
		1534	{
		1535	if (self->incr_need > self->max_size && self->max_size)
		1536	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1537	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1538
		1539	break;
		1540	}
		1541
		1542	SV *sv;
		1543	char *offset;
		1544
		1545	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1546	XPUSHs (sv);
		1547
		1548	sv_chop (cborstr, offset);
		1549
		1550	av_clear (self->incr_count);
		1551	av_push (self->incr_count, newSViv (1));
		1552
		1553	self->incr_pos = 0;
		1554	self->incr_need = self->incr_pos + 1;
		1555	}
		1556	while (ix);
		1557	}
		1558
		1559	void incr_reset (CBOR *self)
		1560	CODE:
		1561	{
		1562	SvREFCNT_dec (self->incr_count);
		1563	self->incr_count = 0;
		1564	}
		1565
1129	void DESTROY (CBOR *self)	1566	void DESTROY (CBOR *self)
1130	CODE:	1567	PPCODE:
1131	SvREFCNT_dec (self->cb_sk_object);	1568	cbor_free (self);
1132	SvREFCNT_dec (self->cb_object);
1133		1569
1134	PROTOTYPES: ENABLE	1570	PROTOTYPES: ENABLE
1135		1571
1136	void encode_cbor (SV *scalar)	1572	void encode_cbor (SV *scalar)
		1573	ALIAS:
		1574	encode_cbor = 0
		1575	encode_cbor_sharing = F_ALLOW_SHARING
1137	PPCODE:	1576	PPCODE:
1138	{	1577	{
1139	CBOR cbor;	1578	CBOR cbor;
1140	cbor_init (&cbor);	1579	cbor_init (&cbor);
		1580	cbor.flags |= ix;
1141	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1581	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1142	XPUSHs (scalar);	1582	XPUSHs (scalar);
1143	}	1583	}
1144		1584
1145	void decode_cbor (SV *cborstr)	1585	void decode_cbor (SV *cborstr)

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