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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.4 by root, Sat Oct 26 21:06:37 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
		15	// compatibility with perl <5.18
		16	#ifndef HvNAMELEN_get
		17	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		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
		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
14	#define F_SHRINK 0x00000200UL	100	#define F_SHRINK 0x00000001UL
15	#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
16		108
17	#define INIT_SIZE 32 // initial scalar size to be allocated	109	#define INIT_SIZE 32 // initial scalar size to be allocated
18		110
19	#define SB do {	111	#define SB do {
20	#define SE } while (0)	112	#define SE } while (0)
21
22	#if __GNUC__ >= 3
23	# define expect(expr,value) __builtin_expect ((expr), (value))
24	# define INLINE static inline
25	#else
26	# define expect(expr,value) (expr)
27	# define INLINE static
28	#endif
29
30	#define expect_false(expr) expect ((expr) != 0, 0)
31	#define expect_true(expr) expect ((expr) != 0, 1)
32		113
33	#define IN_RANGE_INC(type,val,beg,end) \	114	#define IN_RANGE_INC(type,val,beg,end) \
34	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \	115	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
35	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))	116	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
36		117
…		…
42	#else	123	#else
43	# define CBOR_SLOW 0	124	# define CBOR_SLOW 0
44	# define CBOR_STASH cbor_stash	125	# define CBOR_STASH cbor_stash
45	#endif	126	#endif
46		127
47	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::
48	static SV *cbor_true, *cbor_false;	129	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
49		130
50	typedef struct {	131	typedef struct {
51	U32 flags;	132	U32 flags;
52	U32 max_depth;	133	U32 max_depth;
53	STRLEN max_size;	134	STRLEN max_size;
		135	SV *filter;
54		136
55	SV *cb_object;	137	// for the incremental parser
56	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.
57	} CBOR;	141	} CBOR;
58		142
59	INLINE void	143	ecb_inline void
60	cbor_init (CBOR *cbor)	144	cbor_init (CBOR *cbor)
61	{	145	{
62	Zero (cbor, 1, CBOR);	146	Zero (cbor, 1, CBOR);
63	cbor->max_depth = 512;	147	cbor->max_depth = 512;
64	}	148	}
65		149
		150	ecb_inline void
		151	cbor_free (CBOR *cbor)
		152	{
		153	SvREFCNT_dec (cbor->filter);
		154	SvREFCNT_dec (cbor->incr_count);
		155	}
		156
66	/////////////////////////////////////////////////////////////////////////////	157	/////////////////////////////////////////////////////////////////////////////
67	// utility functions	158	// utility functions
68		159
69	INLINE SV *	160	ecb_inline SV *
70	get_bool (const char *name)	161	get_bool (const char *name)
71	{	162	{
72	SV *sv = get_sv (name, 1);	163	SV *sv = get_sv (name, 1);
73		164
74	SvREADONLY_on (sv);	165	SvREADONLY_on (sv);
75	SvREADONLY_on (SvRV (sv));	166	SvREADONLY_on (SvRV (sv));
76		167
77	return sv;	168	return sv;
78	}	169	}
79		170
80	INLINE void	171	ecb_inline void
81	shrink (SV *sv)	172	shrink (SV *sv)
82	{	173	{
83	sv_utf8_downgrade (sv, 1);	174	sv_utf8_downgrade (sv, 1);
84		175
85	if (SvLEN (sv) > SvCUR (sv) + 1)	176	if (SvLEN (sv) > SvCUR (sv) + 1)
…		…
90	SvPV_renew (sv, SvCUR (sv) + 1);	181	SvPV_renew (sv, SvCUR (sv) + 1);
91	#endif	182	#endif
92	}	183	}
93	}	184	}
94		185
95	/////////////////////////////////////////////////////////////////////////////	186	// minimum length of a string to be registered for stringref
96	// fp hell	187	ecb_inline int
97		188	minimum_string_length (UV idx)
98	//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	}
99		200
100	/////////////////////////////////////////////////////////////////////////////	201	/////////////////////////////////////////////////////////////////////////////
101	// encoder	202	// encoder
102		203
103	// structure used for encoding CBOR	204	// structure used for encoding CBOR
…		…
106	char *cur; // SvPVX (sv) + current output position	207	char *cur; // SvPVX (sv) + current output position
107	char *end; // SvEND (sv)	208	char *end; // SvEND (sv)
108	SV *sv; // result scalar	209	SV *sv; // result scalar
109	CBOR cbor;	210	CBOR cbor;
110	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;
111	} enc_t;	216	} enc_t;
112		217
113	INLINE void	218	ecb_inline void
114	need (enc_t *enc, STRLEN len)	219	need (enc_t *enc, STRLEN len)
115	{	220	{
116	if (expect_false (enc->cur + len >= enc->end))	221	if (ecb_expect_false (enc->cur + len >= enc->end))
117	{	222	{
118	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	223	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
119	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	224	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
120	enc->cur = SvPVX (enc->sv) + cur;	225	enc->cur = SvPVX (enc->sv) + cur;
121	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	226	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
122	}	227	}
123	}	228	}
124		229
125	INLINE void	230	ecb_inline void
126	encode_ch (enc_t *enc, char ch)	231	encode_ch (enc_t *enc, char ch)
127	{	232	{
128	need (enc, 1);	233	need (enc, 1);
129	*enc->cur++ = ch;	234	*enc->cur++ = ch;
130	}	235	}
…		…
132	static void	237	static void
133	encode_uint (enc_t *enc, int major, UV len)	238	encode_uint (enc_t *enc, int major, UV len)
134	{	239	{
135	need (enc, 9);	240	need (enc, 9);
136		241
137	if (len < 24)	242	if (ecb_expect_true (len < LENGTH_EXT1))
138	*enc->cur++ = major | len;	243	*enc->cur++ = major | len;
139	else if (len <= 0xff)	244	else if (ecb_expect_true (len <= 0xffU))
140	{	245	{
141	*enc->cur++ = major | 24;	246	*enc->cur++ = major | LENGTH_EXT1;
142	*enc->cur++ = len;	247	*enc->cur++ = len;
143	}	248	}
144	else if (len <= 0xffff)	249	else if (len <= 0xffffU)
145	{	250	{
146	*enc->cur++ = major | 25;	251	*enc->cur++ = major | LENGTH_EXT2;
147	*enc->cur++ = len >> 8;	252	*enc->cur++ = len >> 8;
148	*enc->cur++ = len;	253	*enc->cur++ = len;
149	}	254	}
150	else if (len <= 0xffffffff)	255	else if (len <= 0xffffffffU)
151	{	256	{
152	*enc->cur++ = major | 26;	257	*enc->cur++ = major | LENGTH_EXT4;
153	*enc->cur++ = len >> 24;	258	*enc->cur++ = len >> 24;
154	*enc->cur++ = len >> 16;	259	*enc->cur++ = len >> 16;
155	*enc->cur++ = len >> 8;	260	*enc->cur++ = len >> 8;
156	*enc->cur++ = len;	261	*enc->cur++ = len;
157	}	262	}
158	else	263	else
159	{	264	{
160	*enc->cur++ = major | 27;	265	*enc->cur++ = major | LENGTH_EXT8;
161	*enc->cur++ = len >> 56;	266	*enc->cur++ = len >> 56;
162	*enc->cur++ = len >> 48;	267	*enc->cur++ = len >> 48;
163	*enc->cur++ = len >> 40;	268	*enc->cur++ = len >> 40;
164	*enc->cur++ = len >> 32;	269	*enc->cur++ = len >> 32;
165	*enc->cur++ = len >> 24;	270	*enc->cur++ = len >> 24;
…		…
167	*enc->cur++ = len >> 8;	272	*enc->cur++ = len >> 8;
168	*enc->cur++ = len;	273	*enc->cur++ = len;
169	}	274	}
170	}	275	}
171		276
172	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
173	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	285	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
174	{	286	{
175	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);
176	need (enc, len);	317	need (enc, len);
177	memcpy (enc->cur, str, len);	318	memcpy (enc->cur, str, len);
178	enc->cur += len;	319	enc->cur += len;
179	}	320	}
180		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
181	static void encode_sv (enc_t *enc, SV *sv);	347	static void encode_sv (enc_t *enc, SV *sv);
182		348
183	static void	349	static void
184	encode_av (enc_t *enc, AV *av)	350	encode_av (enc_t *enc, AV *av)
185	{	351	{
…		…
188	if (enc->depth >= enc->cbor.max_depth)	354	if (enc->depth >= enc->cbor.max_depth)
189	croak (ERR_NESTING_EXCEEDED);	355	croak (ERR_NESTING_EXCEEDED);
190		356
191	++enc->depth;	357	++enc->depth;
192		358
193	encode_uint (enc, 0x80, len + 1);	359	encode_uint (enc, MAJOR_ARRAY, len + 1);
194		360
		361	if (SvMAGICAL (av))
195	for (i = 0; i <= len; ++i)	362	for (i = 0; i <= len; ++i)
196	{	363	{
197	SV **svp = av_fetch (av, i, 0);	364	SV **svp = av_fetch (av, i, 0);
198	encode_sv (enc, svp ? *svp : &PL_sv_undef);	365	encode_sv (enc, svp ? *svp : &PL_sv_undef);
199	}	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	}
200		373
201	--enc->depth;	374	--enc->depth;
202	}	375	}
203		376
204	static void	377	static void
…		…
213		386
214	int pairs = hv_iterinit (hv);	387	int pairs = hv_iterinit (hv);
215	int mg = SvMAGICAL (hv);	388	int mg = SvMAGICAL (hv);
216		389
217	if (mg)	390	if (mg)
218	encode_ch (enc, 0xa0 | 31);	391	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
219	else	392	else
220	encode_uint (enc, 0xa0, pairs);	393	encode_uint (enc, MAJOR_MAP, pairs);
221		394
222	while ((he = hv_iternext (hv)))	395	while ((he = hv_iternext (hv)))
223	{	396	{
224	if (HeKLEN (he) == HEf_SVKEY)	397	if (HeKLEN (he) == HEf_SVKEY)
225	encode_sv (enc, HeSVKEY (he));	398	encode_sv (enc, HeSVKEY (he));
226	else	399	else
227	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));
228		401
229	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));
230	}	403	}
231		404
232	if (mg)	405	if (mg)
233	encode_ch (enc, 0xe0 | 31);	406	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
234		407
235	--enc->depth;	408	--enc->depth;
236	}	409	}
237		410
238	// encode objects, arrays and special \0=false and \1=true values.	411	// encode objects, arrays and special \0=false and \1=true values.
239	static void	412	static void
240	encode_rv (enc_t *enc, SV *sv)	413	encode_rv (enc_t *enc, SV *sv)
241	{	414	{
242	svtype svt;
243
244	SvGETMAGIC (sv);	415	SvGETMAGIC (sv);
		416
245	svt = SvTYPE (sv);	417	svtype svt = SvTYPE (sv);
246		418
247	if (expect_false (SvOBJECT (sv)))	419	if (ecb_expect_false (SvOBJECT (sv)))
248	{	420	{
249	HV *stash = !CBOR_SLOW || cbor_boolean_stash	421	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
250	? 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
251	: gv_stashpv ("CBOR::XS::Boolean", 1);	429	: gv_stashpv ("CBOR::XS::Tagged" , 1);
252		430
253	if (SvSTASH (sv) == stash)	431	HV *stash = SvSTASH (sv);
254	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	}
255	else	469	else
256	{	470	{
257	#if 0 //TODO	471	sv_setuv (*svp, enc->shareable_idx);
258	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)))
259	{	483	{
		484	dSP;
		485
		486	ENTER; SAVETMPS;
		487	PUSHMARK (SP);
260	// 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
261	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
262
263	if (to_cbor)
264	{
265	dSP;
266
267	ENTER; SAVETMPS; PUSHMARK (SP);
268	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	489	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
269		490
270	// calling with G_SCALAR ensures that we always get a 1 return value
271	PUTBACK;	491	PUTBACK;
		492	// G_SCALAR ensures that return value is 1
272	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	493	call_sv ((SV *)GvCV (method), G_SCALAR);
273	SPAGAIN;	494	SPAGAIN;
274		495
275	// catch this surprisingly common error	496	// catch this surprisingly common error
276	if (SvROK (TOPs) && SvRV (TOPs) == sv)	497	if (SvROK (TOPs) && SvRV (TOPs) == sv)
277	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	498	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
278		499
279	sv = POPs;
280	PUTBACK;
281
282	encode_sv (enc, sv);	500	encode_sv (enc, POPs);
283		501
		502	PUTBACK;
		503
284	FREETMPS; LEAVE;	504	FREETMPS; LEAVE;
285	}
286	else if (enc->cbor.flags & F_ALLOW_BLESSED)
287	encode_str (enc, "null", 4, 0);
288	else
289	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it",
290	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
291	}	505	}
292	else if (enc->cbor.flags & F_ALLOW_BLESSED)	506	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
293	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	}
294	else	537	else
295	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",
296	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	539	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
297	#endif
298	}
299	}	540	}
300	else if (svt == SVt_PVHV)	541	else if (svt == SVt_PVHV)
301	encode_hv (enc, (HV *)sv);	542	encode_hv (enc, (HV *)sv);
302	else if (svt == SVt_PVAV)	543	else if (svt == SVt_PVAV)
303	encode_av (enc, (AV *)sv);	544	encode_av (enc, (AV *)sv);
304	else if (svt < SVt_PVAV)
305	{
306	STRLEN len = 0;
307	char *pv = svt ? SvPV (sv, len) : 0;
308
309	if (len == 1 && *pv == '1')
310	encode_ch (enc, 0xe0 | 21);
311	else if (len == 1 && *pv == '0')
312	encode_ch (enc, 0xe0 | 20);
313	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
314	encode_ch (enc, 0xe0 | 23);
315	else
316	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
317	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
318	}
319	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
320	encode_ch (enc, 0xe0 | 23);
321	else	545	else
322	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	546	{
323	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	547	encode_tag (enc, CBOR_TAG_INDIRECTION);
		548	encode_sv (enc, sv);
		549	}
324	}	550	}
325		551
326	static void	552	static void
327	encode_nv (enc_t *enc, SV *sv)	553	encode_nv (enc_t *enc, SV *sv)
328	{	554	{
329	double nv = SvNVX (sv);	555	double nv = SvNVX (sv);
330		556
331	need (enc, 9);	557	need (enc, 9);
332		558
333	if (expect_false (nv == (U32)nv))	559	if (ecb_expect_false (nv == (NV)(U32)nv))
334	encode_uint (enc, 0x00, (U32)nv);	560	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
335	//TODO: maybe I32?	561	//TODO: maybe I32?
336	else if (expect_false (nv == (float)nv))	562	else if (ecb_expect_false (nv == (float)nv))
337	{	563	{
338	uint32_t fp = ecb_float_to_binary32 (nv);	564	uint32_t fp = ecb_float_to_binary32 (nv);
339		565
340	*enc->cur++ = 0xe0 | 26;	566	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
341		567
342	if (!ecb_big_endian ())	568	if (!ecb_big_endian ())
343	fp = ecb_bswap32 (fp);	569	fp = ecb_bswap32 (fp);
344		570
345	memcpy (enc->cur, &fp, 4);	571	memcpy (enc->cur, &fp, 4);
…		…
347	}	573	}
348	else	574	else
349	{	575	{
350	uint64_t fp = ecb_double_to_binary64 (nv);	576	uint64_t fp = ecb_double_to_binary64 (nv);
351		577
352	*enc->cur++ = 0xe0 | 27;	578	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
353		579
354	if (!ecb_big_endian ())	580	if (!ecb_big_endian ())
355	fp = ecb_bswap64 (fp);	581	fp = ecb_bswap64 (fp);
356		582
357	memcpy (enc->cur, &fp, 8);	583	memcpy (enc->cur, &fp, 8);
…		…
366		592
367	if (SvPOKp (sv))	593	if (SvPOKp (sv))
368	{	594	{
369	STRLEN len;	595	STRLEN len;
370	char *str = SvPV (sv, len);	596	char *str = SvPV (sv, len);
371	encode_str (enc, SvUTF8 (sv), str, len);	597	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
372	}	598	}
373	else if (SvNOKp (sv))	599	else if (SvNOKp (sv))
374	encode_nv (enc, sv);	600	encode_nv (enc, sv);
375	else if (SvIOKp (sv))	601	else if (SvIOKp (sv))
376	{	602	{
377	if (SvIsUV (sv))	603	if (SvIsUV (sv))
378	encode_uint (enc, 0x00, SvUVX (sv));	604	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
379	else if (SvIVX (sv) >= 0)	605	else if (SvIVX (sv) >= 0)
380	encode_uint (enc, 0x00, SvIVX (sv));	606	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
381	else	607	else
382	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	608	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
383	}	609	}
384	else if (SvROK (sv))	610	else if (SvROK (sv))
385	encode_rv (enc, SvRV (sv));	611	encode_rv (enc, SvRV (sv));
386	else if (!SvOK (sv))	612	else if (!SvOK (sv))
387	encode_ch (enc, 0xe0 | 22);	613	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
388	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	614	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
389	encode_ch (enc, 0xe0 | 23);	615	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
390	else	616	else
391	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",
392	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	618	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
393	}	619	}
394		620
395	static SV *	621	static SV *
396	encode_cbor (SV *scalar, CBOR *cbor)	622	encode_cbor (SV *scalar, CBOR *cbor)
397	{	623	{
398	enc_t enc;	624	enc_t enc = { 0 };
399		625
400	enc.cbor = *cbor;	626	enc.cbor = *cbor;
401	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	627	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
402	enc.cur = SvPVX (enc.sv);	628	enc.cur = SvPVX (enc.sv);
403	enc.end = SvEND (enc.sv);	629	enc.end = SvEND (enc.sv);
404	enc.depth = 0;
405		630
406	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
407	encode_sv (&enc, scalar);	640	encode_sv (&enc, scalar);
408		641
409	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	642	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
410	*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
411		644
…		…
425	U8 *end; // end of input string	658	U8 *end; // end of input string
426	const char *err; // parse error, if != 0	659	const char *err; // parse error, if != 0
427	CBOR cbor;	660	CBOR cbor;
428	U32 depth; // recursion depth	661	U32 depth; // recursion depth
429	U32 maxdepth; // recursion depth limit	662	U32 maxdepth; // recursion depth limit
		663	AV *shareable;
		664	AV *stringref;
		665	SV *decode_tagged;
430	} dec_t;	666	} dec_t;
431		667
432	#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
433		669
434	#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")
435		671
436	#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)
437	#define DEC_DEC_DEPTH --dec->depth	673	#define DEC_DEC_DEPTH --dec->depth
438		674
439	static UV	675	static UV
440	decode_uint (dec_t *dec)	676	decode_uint (dec_t *dec)
441	{	677	{
442	switch (*dec->cur & 31)	678	U8 m = *dec->cur & MINOR_MASK;
443	{	679	++dec->cur;
444	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
445	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
446	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
447	return *dec->cur++ & 31;
448		680
449	case 24:	681	if (ecb_expect_true (m < LENGTH_EXT1))
		682	return m;
		683	else if (ecb_expect_true (m == LENGTH_EXT1))
		684	{
450	WANT (2);	685	WANT (1);
451	dec->cur += 2;	686	dec->cur += 1;
452	return dec->cur[-1];	687	return dec->cur[-1];
453		688	}
454	case 25:	689	else if (ecb_expect_true (m == LENGTH_EXT2))
		690	{
455	WANT (3);	691	WANT (2);
456	dec->cur += 3;	692	dec->cur += 2;
457	return (((UV)dec->cur[-2]) << 8)	693	return (((UV)dec->cur[-2]) << 8)
458	| ((UV)dec->cur[-1]);	694	| ((UV)dec->cur[-1]);
459		695	}
460	case 26:	696	else if (ecb_expect_true (m == LENGTH_EXT4))
		697	{
461	WANT (5);	698	WANT (4);
462	dec->cur += 5;	699	dec->cur += 4;
463	return (((UV)dec->cur[-4]) << 24)	700	return (((UV)dec->cur[-4]) << 24)
464	| (((UV)dec->cur[-3]) << 16)	701	| (((UV)dec->cur[-3]) << 16)
465	| (((UV)dec->cur[-2]) << 8)	702	| (((UV)dec->cur[-2]) << 8)
466	| ((UV)dec->cur[-1]);	703	| ((UV)dec->cur[-1]);
467		704	}
468	case 27:	705	else if (ecb_expect_true (m == LENGTH_EXT8))
		706	{
469	WANT (9);	707	WANT (8);
470	dec->cur += 9;	708	dec->cur += 8;
		709
		710	return
		711	#if UVSIZE < 8
		712	0
		713	#else
471	return (((UV)dec->cur[-8]) << 56)	714	(((UV)dec->cur[-8]) << 56)
472	| (((UV)dec->cur[-7]) << 48)	715	| (((UV)dec->cur[-7]) << 48)
473	| (((UV)dec->cur[-6]) << 40)	716	| (((UV)dec->cur[-6]) << 40)
474	| (((UV)dec->cur[-5]) << 32)	717	| (((UV)dec->cur[-5]) << 32)
		718	#endif
475	| (((UV)dec->cur[-4]) << 24)	719	| (((UV)dec->cur[-4]) << 24)
476	| (((UV)dec->cur[-3]) << 16)	720	| (((UV)dec->cur[-3]) << 16)
477	| (((UV)dec->cur[-2]) << 8)	721	| (((UV)dec->cur[-2]) << 8)
478	| ((UV)dec->cur[-1]);	722	| ((UV)dec->cur[-1]);
479		723	}
480	default:	724	else
481	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	725	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
482	}
483		726
484	fail:	727	fail:
485	return 0;	728	return 0;
486	}	729	}
487		730
…		…
492	{	735	{
493	AV *av = newAV ();	736	AV *av = newAV ();
494		737
495	DEC_INC_DEPTH;	738	DEC_INC_DEPTH;
496		739
497	if ((*dec->cur & 31) == 31)	740	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
498	{	741	{
499	++dec->cur;	742	++dec->cur;
500		743
501	for (;;)	744	for (;;)
502	{	745	{
503	WANT (1);	746	WANT (1);
504		747
505	if (*dec->cur == (0xe0 | 31))	748	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
506	{	749	{
507	++dec->cur;	750	++dec->cur;
508	break;	751	break;
509	}	752	}
510		753
511	av_push (av, decode_sv (dec));	754	av_push (av, decode_sv (dec));
512	}	755	}
513	}	756	}
514	else	757	else
515	{	758	{
516	int i, len = decode_uint (dec);	759	UV i, len = decode_uint (dec);
517		760
		761	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
518	av_fill (av, len - 1);	762	av_fill (av, len - 1);
519		763
520	for (i = 0; i < len; ++i)	764	for (i = 0; i < len; ++i)
521	AvARRAY (av)[i] = decode_sv (dec);	765	AvARRAY (av)[i] = decode_sv (dec);
522	}	766	}
…		…
528	SvREFCNT_dec (av);	772	SvREFCNT_dec (av);
529	DEC_DEC_DEPTH;	773	DEC_DEC_DEPTH;
530	return &PL_sv_undef;	774	return &PL_sv_undef;
531	}	775	}
532		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
533	static SV *	823	static SV *
534	decode_hv (dec_t *dec)	824	decode_hv (dec_t *dec)
535	{	825	{
536	HV *hv = newHV ();	826	HV *hv = newHV ();
537		827
538	DEC_INC_DEPTH;	828	DEC_INC_DEPTH;
539		829
540	if ((*dec->cur & 31) == 31)	830	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
541	{	831	{
542	++dec->cur;	832	++dec->cur;
543		833
544	for (;;)	834	for (;;)
545	{	835	{
546	WANT (1);	836	WANT (1);
547		837
548	if (*dec->cur == (0xe0 | 31))	838	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
549	{	839	{
550	++dec->cur;	840	++dec->cur;
551	break;	841	break;
552	}	842	}
553		843
554	SV *k = decode_sv (dec);	844	decode_he (dec, hv);
555	SV *v = decode_sv (dec);
556
557	hv_store_ent (hv, k, v, 0);
558	}	845	}
559	}	846	}
560	else	847	else
561	{	848	{
562	int len = decode_uint (dec);	849	UV pairs = decode_uint (dec);
563		850
		851	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		852
564	while (len--)	853	while (pairs--)
565	{	854	decode_he (dec, hv);
566	SV *k = decode_sv (dec);
567	SV *v = decode_sv (dec);
568
569	hv_store_ent (hv, k, v, 0);
570	}
571	}	855	}
572		856
573	DEC_DEC_DEPTH;	857	DEC_DEC_DEPTH;
574	return newRV_noinc ((SV *)hv);	858	return newRV_noinc ((SV *)hv);
575
576	#if 0
577	SV *sv;
578	HV *hv = newHV ();
579
580	DEC_INC_DEPTH;
581	decode_ws (dec);
582
583	for (;;)
584	{
585	// heuristic: assume that
586	// a) decode_str + hv_store_ent are abysmally slow.
587	// b) most hash keys are short, simple ascii text.
588	// => try to "fast-match" such strings to avoid
589	// the overhead of decode_str + hv_store_ent.
590	{
591	SV *value;
592	char *p = dec->cur;
593	char *e = p + 24; // only try up to 24 bytes
594
595	for (;;)
596	{
597	// the >= 0x80 is false on most architectures
598	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
599	{
600	// slow path, back up and use decode_str
601	SV *key = decode_str (dec);
602	if (!key)
603	goto fail;
604
605	decode_ws (dec); EXPECT_CH (':');
606
607	decode_ws (dec);
608	value = decode_sv (dec);
609	if (!value)
610	{
611	SvREFCNT_dec (key);
612	goto fail;
613	}
614
615	hv_store_ent (hv, key, value, 0);
616	SvREFCNT_dec (key);
617
618	break;
619	}
620	else if (*p == '"')
621	{
622	// fast path, got a simple key
623	char *key = dec->cur;
624	int len = p - key;
625	dec->cur = p + 1;
626
627	decode_ws (dec); EXPECT_CH (':');
628
629	decode_ws (dec);
630	value = decode_sv (dec);
631	if (!value)
632	goto fail;
633
634	hv_store (hv, key, len, value, 0);
635
636	break;
637	}
638
639	++p;
640	}
641	}
642
643	decode_ws (dec);
644
645	if (*dec->cur == '}')
646	{
647	++dec->cur;
648	break;
649	}
650
651	if (*dec->cur != ',')
652	ERR (", or } expected while parsing object/hash");
653
654	++dec->cur;
655
656	decode_ws (dec);
657
658	if (*dec->cur == '}' && dec->cbor.flags & F_RELAXED)
659	{
660	++dec->cur;
661	break;
662	}
663	}
664
665	DEC_DEC_DEPTH;
666	sv = newRV_noinc ((SV *)hv);
667
668	// check filter callbacks
669	if (dec->cbor.flags & F_HOOK)
670	{
671	if (dec->cbor.cb_sk_object && HvKEYS (hv) == 1)
672	{
673	HE *cb, *he;
674
675	hv_iterinit (hv);
676	he = hv_iternext (hv);
677	hv_iterinit (hv);
678
679	// the next line creates a mortal sv each time its called.
680	// might want to optimise this for common cases.
681	cb = hv_fetch_ent (dec->cbor.cb_sk_object, hv_iterkeysv (he), 0, 0);
682
683	if (cb)
684	{
685	dSP;
686	int count;
687
688	ENTER; SAVETMPS; PUSHMARK (SP);
689	XPUSHs (HeVAL (he));
690	sv_2mortal (sv);
691
692	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
693
694	if (count == 1)
695	{
696	sv = newSVsv (POPs);
697	FREETMPS; LEAVE;
698	return sv;
699	}
700
701	SvREFCNT_inc (sv);
702	FREETMPS; LEAVE;
703	}
704	}
705
706	if (dec->cbor.cb_object)
707	{
708	dSP;
709	int count;
710
711	ENTER; SAVETMPS; PUSHMARK (SP);
712	XPUSHs (sv_2mortal (sv));
713
714	PUTBACK; count = call_sv (dec->cbor.cb_object, G_ARRAY); SPAGAIN;
715
716	if (count == 1)
717	{
718	sv = newSVsv (POPs);
719	FREETMPS; LEAVE;
720	return sv;
721	}
722
723	SvREFCNT_inc (sv);
724	FREETMPS; LEAVE;
725	}
726	}
727
728	return sv;
729	#endif
730		859
731	fail:	860	fail:
732	SvREFCNT_dec (hv);	861	SvREFCNT_dec (hv);
733	DEC_DEC_DEPTH;	862	DEC_DEC_DEPTH;
734	return &PL_sv_undef;	863	return &PL_sv_undef;
735	}	864	}
736		865
737	static SV *	866	static SV *
738	decode_str (dec_t *dec, int utf8)	867	decode_str (dec_t *dec, int utf8)
739	{	868	{
740	SV *sv;	869	SV *sv = 0;
741		870
742	if ((*dec->cur & 31) == 31)	871	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
743	{	872	{
		873	// indefinite length strings
744	++dec->cur;	874	++dec->cur;
745		875
		876	U8 major = *dec->cur & MAJOR_MISC;
		877
746	sv = newSVpvn ("", 0);	878	sv = newSVpvn ("", 0);
747		879
748	// not very fast, and certainly not robust against illegal input
749	for (;;)	880	for (;;)
750	{	881	{
751	WANT (1);	882	WANT (1);
752		883
753	if (*dec->cur == (0xe0 | 31))	884	if ((*dec->cur - major) > LENGTH_EXT8)
		885	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
754	{	886	{
755	++dec->cur;	887	++dec->cur;
756	break;	888	break;
757	}	889	}
		890	else
		891	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
758		892
759	SV *sv2 = decode_sv (dec);	893	STRLEN len = decode_uint (dec);
760	sv_catsv (sv, sv2);	894
		895	WANT (len);
		896	sv_catpvn (sv, dec->cur, len);
		897	dec->cur += len;
761	}	898	}
762	}	899	}
763	else	900	else
764	{	901	{
765	STRLEN len = decode_uint (dec);	902	STRLEN len = decode_uint (dec);
766		903
767	WANT (len);	904	WANT (len);
768	sv = newSVpvn (dec->cur, len);	905	sv = newSVpvn (dec->cur, len);
769	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));
770	}	911	}
771		912
772	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
773	SvUTF8_on (sv);	919	SvUTF8_on (sv);
		920	}
774		921
775	return sv;	922	return sv;
776		923
777	fail:	924	fail:
		925	SvREFCNT_dec (sv);
778	return &PL_sv_undef;	926	return &PL_sv_undef;
779	}	927	}
780		928
781	static SV *	929	static SV *
782	decode_tagged (dec_t *dec)	930	decode_tagged (dec_t *dec)
783	{	931	{
		932	SV *sv = 0;
784	UV tag = decode_uint (dec);	933	UV tag = decode_uint (dec);
		934
		935	WANT (1);
		936
		937	switch (tag)
		938	{
		939	case CBOR_TAG_MAGIC:
785	SV *sv = decode_sv (dec);	940	sv = decode_sv (dec);
		941	break;
786		942
787	if (tag == 55799) // 2.4.5 Self-Describe CBOR	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
788	return sv;	1115	return sv;
789		1116
790	AV *av = newAV ();	1117	fail:
791	av_push (av, newSVuv (tag));	1118	SvREFCNT_dec (sv);
792	av_push (av, sv);	1119	return &PL_sv_undef;
793	return newRV_noinc ((SV *)av);
794	}	1120	}
795		1121
796	static SV *	1122	static SV *
797	decode_sv (dec_t *dec)	1123	decode_sv (dec_t *dec)
798	{	1124	{
799	WANT (1);	1125	WANT (1);
800		1126
801	switch (*dec->cur >> 5)	1127	switch (*dec->cur >> MAJOR_SHIFT)
802	{	1128	{
803	case 0: // unsigned int	1129	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
804	//TODO: 64 bit values on 3 2bit perls	1130	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
805	return newSVuv (decode_uint (dec));	1131	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
806	case 1: // negative int	1132	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
807	return newSViv (-1 - (IV)decode_uint (dec));	1133	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
808	case 2: // octet string	1134	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
809	return decode_str (dec, 0);	1135	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
810	case 3: // utf-8 string	1136
811	return decode_str (dec, 1);	1137	case MAJOR_MISC >> MAJOR_SHIFT:
812	case 4: // array
813	return decode_av (dec);
814	case 5: // map
815	return decode_hv (dec);
816	case 6: // tag
817	return decode_tagged (dec);
818	case 7: // misc
819	switch (*dec->cur++ & 31)	1138	switch (*dec->cur++ & MINOR_MASK)
820	{	1139	{
821	case 20:	1140	case SIMPLE_FALSE:
822	#if CBOR_SLOW	1141	#if CBOR_SLOW
823	cbor_false = get_bool ("CBOR::XS::false");	1142	types_false = get_bool ("Types::Serialiser::false");
824	#endif	1143	#endif
825	return newSVsv (cbor_false);	1144	return newSVsv (types_false);
826	case 21:	1145	case SIMPLE_TRUE:
827	#if CBOR_SLOW	1146	#if CBOR_SLOW
828	cbor_true = get_bool ("CBOR::XS::true");	1147	types_true = get_bool ("Types::Serialiser::true");
829	#endif	1148	#endif
830	return newSVsv (cbor_true);	1149	return newSVsv (types_true);
831	case 22:	1150	case SIMPLE_NULL:
832	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);
833		1157
834	case 25:	1158	case MISC_FLOAT16:
835	{	1159	{
836	WANT (2);	1160	WANT (2);
837		1161
838	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1162	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
839	dec->cur += 2;	1163	dec->cur += 2;
840		1164
841	return newSVnv (ecb_binary16_to_float (fp));	1165	return newSVnv (ecb_binary16_to_float (fp));
842	}	1166	}
843		1167
844	case 26:	1168	case MISC_FLOAT32:
845	{	1169	{
846	uint32_t fp;	1170	uint32_t fp;
847	WANT (4);	1171	WANT (4);
848	memcpy (&fp, dec->cur, 4);	1172	memcpy (&fp, dec->cur, 4);
849	dec->cur += 4;	1173	dec->cur += 4;
…		…
852	fp = ecb_bswap32 (fp);	1176	fp = ecb_bswap32 (fp);
853		1177
854	return newSVnv (ecb_binary32_to_float (fp));	1178	return newSVnv (ecb_binary32_to_float (fp));
855	}	1179	}
856		1180
857	case 27:	1181	case MISC_FLOAT64:
858	{	1182	{
859	uint64_t fp;	1183	uint64_t fp;
860	WANT (8);	1184	WANT (8);
861	memcpy (&fp, dec->cur, 8);	1185	memcpy (&fp, dec->cur, 8);
862	dec->cur += 8;	1186	dec->cur += 8;
…		…
865	fp = ecb_bswap64 (fp);	1189	fp = ecb_bswap64 (fp);
866		1190
867	return newSVnv (ecb_binary64_to_double (fp));	1191	return newSVnv (ecb_binary64_to_double (fp));
868	}	1192	}
869		1193
870	// 0..19 unassigned	1194	// 0..19 unassigned simple
871	// 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
872	default:	1198	default:
873	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1199	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
874	}	1200	}
875		1201
876	break;	1202	break;
877	}	1203	}
878	#if 0
879	switch (*dec->cur)
880	{
881	//case '"': ++dec->cur; return decode_str (dec);
882	case '[': ++dec->cur; return decode_av (dec);
883	case '{': ++dec->cur; return decode_hv (dec);
884
885	case '-':
886	case '0': case '1': case '2': case '3': case '4':
887	case '5': case '6': case '7': case '8': case '9':
888	//TODO return decode_num (dec);
889
890	case 't':
891	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
892	{
893	dec->cur += 4;
894	#if CBOR_SLOW
895	cbor_true = get_bool ("CBOR::XS::true");
896	#endif
897	return newSVsv (cbor_true);
898	}
899	else
900	ERR ("'true' expected");
901
902	break;
903
904	case 'f':
905	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
906	{
907	dec->cur += 5;
908	#if CBOR_SLOW
909	cbor_false = get_bool ("CBOR::XS::false");
910	#endif
911	return newSVsv (cbor_false);
912	}
913	else
914	ERR ("'false' expected");
915
916	break;
917
918	case 'n':
919	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
920	{
921	dec->cur += 4;
922	return newSVsv (&PL_sv_undef);
923	}
924	else
925	ERR ("'null' expected");
926
927	break;
928
929	default:
930	ERR ("malformed CBOR string, neither array, object, number, string or atom");
931	break;
932	}
933	#endif
934		1204
935	fail:	1205	fail:
936	return &PL_sv_undef;	1206	return &PL_sv_undef;
937	}	1207	}
938		1208
939	static SV *	1209	static SV *
940	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1210	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
941	{	1211	{
942	dec_t dec;	1212	dec_t dec = { 0 };
943	SV *sv;	1213	SV *sv;
		1214	STRLEN len;
		1215	char *data = SvPVbyte (string, len);
944		1216
945	/* work around bugs in 5.10 where manipulating magic values
946	* makes perl ignore the magic in subsequent accesses.
947	* also make a copy of non-PV values, to get them into a clean
948	* state (SvPV should do that, but it's buggy, see below).
949	*/
950	/*SvGETMAGIC (string);*/
951	if (SvMAGICAL (string) || !SvPOK (string))
952	string = sv_2mortal (newSVsv (string));
953
954	SvUPGRADE (string, SVt_PV);
955
956	/* work around a bug in perl 5.10, which causes SvCUR to fail an
957	* assertion with -DDEBUGGING, although SvCUR is documented to
958	* return the xpv_cur field which certainly exists after upgrading.
959	* according to nicholas clark, calling SvPOK fixes this.
960	* But it doesn't fix it, so try another workaround, call SvPV_nolen
961	* and hope for the best.
962	* Damnit, SvPV_nolen still trips over yet another assertion. This
963	* assertion business is seriously broken, try yet another workaround
964	* for the broken -DDEBUGGING.
965	*/
966	{
967	#ifdef DEBUGGING
968	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
969	#else
970	STRLEN offset = SvCUR (string);
971	#endif
972
973	if (offset > cbor->max_size && cbor->max_size)	1217	if (len > cbor->max_size && cbor->max_size)
974	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1218	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
975	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1219	(unsigned long)len, (unsigned long)cbor->max_size);
976	}
977
978	sv_utf8_downgrade (string, 0);
979		1220
980	dec.cbor = *cbor;	1221	dec.cbor = *cbor;
981	dec.cur = (U8 *)SvPVX (string);	1222	dec.cur = (U8 *)data;
982	dec.end = (U8 *)SvEND (string);	1223	dec.end = (U8 *)data + len;
983	dec.err = 0;
984	dec.depth = 0;
985
986	if (dec.cbor.cb_object || dec.cbor.cb_sk_object)
987	;//TODO dec.cbor.flags |= F_HOOK;
988		1224
989	sv = decode_sv (&dec);	1225	sv = decode_sv (&dec);
990		1226
991	if (offset_return)	1227	if (offset_return)
992	*offset_return = dec.cur;	1228	*offset_return = dec.cur;
…		…
995	if (dec.cur != dec.end && !dec.err)	1231	if (dec.cur != dec.end && !dec.err)
996	dec.err = "garbage after CBOR object";	1232	dec.err = "garbage after CBOR object";
997		1233
998	if (dec.err)	1234	if (dec.err)
999	{	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
1000	SvREFCNT_dec (sv);	1247	SvREFCNT_dec (sv);
1001	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);
1002	}	1249	}
1003		1250
1004	sv = sv_2mortal (sv);	1251	sv = sv_2mortal (sv);
1005		1252
1006	return sv;	1253	return sv;
1007	}	1254	}
1008		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
1009	/////////////////////////////////////////////////////////////////////////////	1380	/////////////////////////////////////////////////////////////////////////////
1010	// XS interface functions	1381	// XS interface functions
1011		1382
1012	MODULE = CBOR::XS PACKAGE = CBOR::XS	1383	MODULE = CBOR::XS PACKAGE = CBOR::XS
1013		1384
1014	BOOT:	1385	BOOT:
1015	{	1386	{
1016	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1387	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1017	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1388	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1018		1389
1019	cbor_true = get_bool ("CBOR::XS::true");	1390	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1020	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));
1021	}	1403	}
1022		1404
1023	PROTOTYPES: DISABLE	1405	PROTOTYPES: DISABLE
1024		1406
1025	void CLONE (...)	1407	void CLONE (...)
1026	CODE:	1408	CODE:
1027	cbor_stash = 0;	1409	cbor_stash = 0;
		1410	cbor_tagged_stash = 0;
		1411	types_error_stash = 0;
1028	cbor_boolean_stash = 0;	1412	types_boolean_stash = 0;
1029		1413
1030	void new (char *klass)	1414	void new (char *klass)
1031	PPCODE:	1415	PPCODE:
1032	{	1416	{
1033	SV *pv = NEWSV (0, sizeof (CBOR));	1417	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1041		1425
1042	void shrink (CBOR *self, int enable = 1)	1426	void shrink (CBOR *self, int enable = 1)
1043	ALIAS:	1427	ALIAS:
1044	shrink = F_SHRINK	1428	shrink = F_SHRINK
1045	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
1046	PPCODE:	1436	PPCODE:
1047	{	1437	{
1048	if (enable)	1438	if (enable)
1049	self->flags |= ix;	1439	self->flags |= ix;
1050	else	1440	else
…		…
1055		1445
1056	void get_shrink (CBOR *self)	1446	void get_shrink (CBOR *self)
1057	ALIAS:	1447	ALIAS:
1058	get_shrink = F_SHRINK	1448	get_shrink = F_SHRINK
1059	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
1060	PPCODE:	1456	PPCODE:
1061	XPUSHs (boolSV (self->flags & ix));	1457	XPUSHs (boolSV (self->flags & ix));
1062		1458
1063	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1459	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1064	PPCODE:	1460	PPCODE:
…		…
1080	CODE:	1476	CODE:
1081	RETVAL = self->max_size;	1477	RETVAL = self->max_size;
1082	OUTPUT:	1478	OUTPUT:
1083	RETVAL	1479	RETVAL
1084		1480
1085	#if 0 //TODO	1481	void filter (CBOR *self, SV *filter = 0)
1086
1087	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1088	PPCODE:	1482	PPCODE:
1089	{
1090	SvREFCNT_dec (self->cb_object);	1483	SvREFCNT_dec (self->filter);
1091	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1484	self->filter = filter ? newSVsv (filter) : filter;
1092
1093	XPUSHs (ST (0));	1485	XPUSHs (ST (0));
1094	}
1095		1486
1096	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1487	SV *get_filter (CBOR *self)
1097	PPCODE:	1488	CODE:
1098	{	1489	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1099	if (!self->cb_sk_object)	1490	OUTPUT:
1100	self->cb_sk_object = newHV ();	1491	RETVAL
1101
1102	if (SvOK (cb))
1103	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1104	else
1105	{
1106	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1107
1108	if (!HvKEYS (self->cb_sk_object))
1109	{
1110	SvREFCNT_dec (self->cb_sk_object);
1111	self->cb_sk_object = 0;
1112	}
1113	}
1114
1115	XPUSHs (ST (0));
1116	}
1117
1118	#endif
1119		1492
1120	void encode (CBOR *self, SV *scalar)	1493	void encode (CBOR *self, SV *scalar)
1121	PPCODE:	1494	PPCODE:
1122	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1495	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1123	XPUSHs (scalar);	1496	XPUSHs (scalar);
…		…
1136	EXTEND (SP, 2);	1509	EXTEND (SP, 2);
1137	PUSHs (sv);	1510	PUSHs (sv);
1138	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1511	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1139	}	1512	}
1140		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
1141	void DESTROY (CBOR *self)	1566	void DESTROY (CBOR *self)
1142	CODE:	1567	PPCODE:
1143	SvREFCNT_dec (self->cb_sk_object);	1568	cbor_free (self);
1144	SvREFCNT_dec (self->cb_object);
1145		1569
1146	PROTOTYPES: ENABLE	1570	PROTOTYPES: ENABLE
1147		1571
1148	void encode_cbor (SV *scalar)	1572	void encode_cbor (SV *scalar)
		1573	ALIAS:
		1574	encode_cbor = 0
		1575	encode_cbor_sharing = F_ALLOW_SHARING
1149	PPCODE:	1576	PPCODE:
1150	{	1577	{
1151	CBOR cbor;	1578	CBOR cbor;
1152	cbor_init (&cbor);	1579	cbor_init (&cbor);
		1580	cbor.flags |= ix;
1153	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1581	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1154	XPUSHs (scalar);	1582	XPUSHs (scalar);
1155	}	1583	}
1156		1584
1157	void decode_cbor (SV *cborstr)	1585	void decode_cbor (SV *cborstr)

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