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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.3 by root, Sat Oct 26 11:08:34 2013 UTC vs.
Revision 1.36 by root, Sat Nov 30 17:37:45 2013 UTC

…		…
9	#include <limits.h>	9	#include <limits.h>
10	#include <float.h>	10	#include <float.h>
11		11
12	#include "ecb.h"	12	#include "ecb.h"
13		13
		14	// compatibility with perl <5.18
		15	#ifndef HvNAMELEN_get
		16	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		17	#endif
		18	#ifndef HvNAMELEN
		19	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		20	#endif
		21	#ifndef HvNAMEUTF8
		22	# define HvNAMEUTF8(hv) 0
		23	#endif
		24	#ifndef SvREFCNT_dec_NN
		25	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		26	#endif
		27
		28	// known major and minor types
		29	enum cbor_type
		30	{
		31	MAJOR_SHIFT = 5,
		32	MINOR_MASK = 0x1f,
		33
		34	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		35	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		36	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		37	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		38	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		39	MAJOR_MAP = 5 << MAJOR_SHIFT,
		40	MAJOR_TAG = 6 << MAJOR_SHIFT,
		41	MAJOR_MISC = 7 << MAJOR_SHIFT,
		42
		43	// INT/STRING/ARRAY/MAP subtypes
		44	LENGTH_EXT1 = 24,
		45	LENGTH_EXT2 = 25,
		46	LENGTH_EXT4 = 26,
		47	LENGTH_EXT8 = 27,
		48
		49	// SIMPLE types (effectively MISC subtypes)
		50	SIMPLE_FALSE = 20,
		51	SIMPLE_TRUE = 21,
		52	SIMPLE_NULL = 22,
		53	SIMPLE_UNDEF = 23,
		54
		55	// MISC subtype (unused)
		56	MISC_EXT1 = 24,
		57	MISC_FLOAT16 = 25,
		58	MISC_FLOAT32 = 26,
		59	MISC_FLOAT64 = 27,
		60
		61	// BYTES/TEXT/ARRAY/MAP
		62	MINOR_INDEF = 31,
		63	};
		64
		65	// known tags
		66	enum cbor_tag
		67	{
		68	// extensions
		69	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
		70	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
		71	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
		72	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
		73	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
		74	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
		75	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
		76
		77	// rfc7049
		78	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
		79	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
		80	CBOR_TAG_POS_BIGNUM = 2, // byte string
		81	CBOR_TAG_NEG_BIGNUM = 3, // byte string
		82	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
		83	CBOR_TAG_BIGFLOAT = 5, // array
		84
		85	CBOR_TAG_CONV_B64U = 21, // base64url, any
		86	CBOR_TAG_CONV_B64 = 22, // base64, any
		87	CBOR_TAG_CONV_HEX = 23, // base16, any
		88	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
		89
		90	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
		91	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
		92	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
		93	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
		94	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
		95
		96	CBOR_TAG_MAGIC = 55799, // self-describe cbor
		97	};
		98
14	#define F_SHRINK 0x00000200UL	99	#define F_SHRINK 0x00000001UL
15	#define F_ALLOW_UNKNOWN 0x00002000UL	100	#define F_ALLOW_UNKNOWN 0x00000002UL
		101	#define F_ALLOW_SHARING 0x00000004UL
		102	#define F_PACK_STRINGS 0x00000008UL
16		103
17	#define INIT_SIZE 32 // initial scalar size to be allocated	104	#define INIT_SIZE 32 // initial scalar size to be allocated
18		105
19	#define SB do {	106	#define SB do {
20	#define SE } while (0)	107	#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		108
33	#define IN_RANGE_INC(type,val,beg,end) \	109	#define IN_RANGE_INC(type,val,beg,end) \
34	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \	110	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
35	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))	111	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
36		112
…		…
42	#else	118	#else
43	# define CBOR_SLOW 0	119	# define CBOR_SLOW 0
44	# define CBOR_STASH cbor_stash	120	# define CBOR_STASH cbor_stash
45	#endif	121	#endif
46		122
47	static HV *cbor_stash, *cbor_boolean_stash; // CBOR::XS::	123	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
48	static SV *cbor_true, *cbor_false;	124	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
49		125
50	typedef struct {	126	typedef struct {
51	U32 flags;	127	U32 flags;
52	U32 max_depth;	128	U32 max_depth;
53	STRLEN max_size;	129	STRLEN max_size;
54		130	SV *filter;
55	SV *cb_object;
56	HV *cb_sk_object;
57	} CBOR;	131	} CBOR;
58		132
59	INLINE void	133	ecb_inline void
60	cbor_init (CBOR *cbor)	134	cbor_init (CBOR *cbor)
61	{	135	{
62	Zero (cbor, 1, CBOR);	136	Zero (cbor, 1, CBOR);
63	cbor->max_depth = 512;	137	cbor->max_depth = 512;
64	}	138	}
65		139
		140	ecb_inline void
		141	cbor_free (CBOR *cbor)
		142	{
		143	SvREFCNT_dec (cbor->filter);
		144	}
		145
66	/////////////////////////////////////////////////////////////////////////////	146	/////////////////////////////////////////////////////////////////////////////
67	// utility functions	147	// utility functions
68		148
69	INLINE SV *	149	ecb_inline SV *
70	get_bool (const char *name)	150	get_bool (const char *name)
71	{	151	{
72	SV *sv = get_sv (name, 1);	152	SV *sv = get_sv (name, 1);
73		153
74	SvREADONLY_on (sv);	154	SvREADONLY_on (sv);
75	SvREADONLY_on (SvRV (sv));	155	SvREADONLY_on (SvRV (sv));
76		156
77	return sv;	157	return sv;
78	}	158	}
79		159
80	INLINE void	160	ecb_inline void
81	shrink (SV *sv)	161	shrink (SV *sv)
82	{	162	{
83	sv_utf8_downgrade (sv, 1);	163	sv_utf8_downgrade (sv, 1);
84		164
85	if (SvLEN (sv) > SvCUR (sv) + 1)	165	if (SvLEN (sv) > SvCUR (sv) + 1)
…		…
90	SvPV_renew (sv, SvCUR (sv) + 1);	170	SvPV_renew (sv, SvCUR (sv) + 1);
91	#endif	171	#endif
92	}	172	}
93	}	173	}
94		174
95	/////////////////////////////////////////////////////////////////////////////	175	// minimum length of a string to be registered for stringref
96	// fp hell	176	ecb_inline int
97		177	minimum_string_length (UV idx)
98	//TODO	178	{
		179	return idx > 23
		180	? idx > 0xffU
		181	? idx > 0xffffU
		182	? idx > 0xffffffffU
		183	? 11
		184	: 7
		185	: 5
		186	: 4
		187	: 3;
		188	}
99		189
100	/////////////////////////////////////////////////////////////////////////////	190	/////////////////////////////////////////////////////////////////////////////
101	// encoder	191	// encoder
102		192
103	// structure used for encoding CBOR	193	// structure used for encoding CBOR
…		…
106	char *cur; // SvPVX (sv) + current output position	196	char *cur; // SvPVX (sv) + current output position
107	char *end; // SvEND (sv)	197	char *end; // SvEND (sv)
108	SV *sv; // result scalar	198	SV *sv; // result scalar
109	CBOR cbor;	199	CBOR cbor;
110	U32 depth; // recursion level	200	U32 depth; // recursion level
		201	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		202	UV stringref_idx;
		203	HV *shareable; // ptr => index, or 0
		204	UV shareable_idx;
111	} enc_t;	205	} enc_t;
112		206
113	INLINE void	207	ecb_inline void
114	need (enc_t *enc, STRLEN len)	208	need (enc_t *enc, STRLEN len)
115	{	209	{
116	if (expect_false (enc->cur + len >= enc->end))	210	if (ecb_expect_false (enc->cur + len >= enc->end))
117	{	211	{
118	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	212	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
119	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	213	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
120	enc->cur = SvPVX (enc->sv) + cur;	214	enc->cur = SvPVX (enc->sv) + cur;
121	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	215	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
122	}	216	}
123	}	217	}
124		218
125	INLINE void	219	ecb_inline void
126	encode_ch (enc_t *enc, char ch)	220	encode_ch (enc_t *enc, char ch)
127	{	221	{
128	need (enc, 1);	222	need (enc, 1);
129	*enc->cur++ = ch;	223	*enc->cur++ = ch;
130	}	224	}
…		…
132	static void	226	static void
133	encode_uint (enc_t *enc, int major, UV len)	227	encode_uint (enc_t *enc, int major, UV len)
134	{	228	{
135	need (enc, 9);	229	need (enc, 9);
136		230
137	if (len < 24)	231	if (ecb_expect_true (len < LENGTH_EXT1))
138	*enc->cur++ = major | len;	232	*enc->cur++ = major | len;
139	else if (len < 0x100)	233	else if (ecb_expect_true (len <= 0xffU))
140	{	234	{
141	*enc->cur++ = major | 24;	235	*enc->cur++ = major | LENGTH_EXT1;
142	*enc->cur++ = len;	236	*enc->cur++ = len;
143	}	237	}
144	else if (len < 0x10000)	238	else if (len <= 0xffffU)
145	{	239	{
146	*enc->cur++ = major | 25;	240	*enc->cur++ = major | LENGTH_EXT2;
147	*enc->cur++ = len >> 8;	241	*enc->cur++ = len >> 8;
148	*enc->cur++ = len;	242	*enc->cur++ = len;
149	}	243	}
150	else if (len < 0x100000000)	244	else if (len <= 0xffffffffU)
151	{	245	{
152	*enc->cur++ = major | 26;	246	*enc->cur++ = major | LENGTH_EXT4;
153	*enc->cur++ = len >> 24;	247	*enc->cur++ = len >> 24;
154	*enc->cur++ = len >> 16;	248	*enc->cur++ = len >> 16;
155	*enc->cur++ = len >> 8;	249	*enc->cur++ = len >> 8;
156	*enc->cur++ = len;	250	*enc->cur++ = len;
157	}	251	}
158	else if (len)	252	else
159	{	253	{
160	*enc->cur++ = major | 27;	254	*enc->cur++ = major | LENGTH_EXT8;
161	*enc->cur++ = len >> 56;	255	*enc->cur++ = len >> 56;
162	*enc->cur++ = len >> 48;	256	*enc->cur++ = len >> 48;
163	*enc->cur++ = len >> 40;	257	*enc->cur++ = len >> 40;
164	*enc->cur++ = len >> 32;	258	*enc->cur++ = len >> 32;
165	*enc->cur++ = len >> 24;	259	*enc->cur++ = len >> 24;
…		…
167	*enc->cur++ = len >> 8;	261	*enc->cur++ = len >> 8;
168	*enc->cur++ = len;	262	*enc->cur++ = len;
169	}	263	}
170	}	264	}
171		265
172	static void	266	ecb_inline void
		267	encode_tag (enc_t *enc, UV tag)
		268	{
		269	encode_uint (enc, MAJOR_TAG, tag);
		270	}
		271
		272	ecb_inline void
173	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	273	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)
174	{	274	{
175	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	275	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
176	need (enc, len);	276	need (enc, len);
177	memcpy (enc->cur, str, len);	277	memcpy (enc->cur, str, len);
178	enc->cur += len;	278	enc->cur += len;
179	}	279	}
180		280
		281	static void
		282	encode_strref (enc_t *enc, int utf8, char *str, STRLEN len)
		283	{
		284	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		285	{
		286	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		287
		288	if (SvOK (*svp))
		289	{
		290	// already registered, use stringref
		291	encode_tag (enc, CBOR_TAG_STRINGREF);
		292	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		293	return;
		294	}
		295	else if (len >= minimum_string_length (enc->stringref_idx))
		296	{
		297	// register only
		298	sv_setuv (*svp, enc->stringref_idx);
		299	++enc->stringref_idx;
		300	}
		301	}
		302
		303	encode_str (enc, utf8, str, len);
		304	}
		305
181	static void encode_sv (enc_t *enc, SV *sv);	306	static void encode_sv (enc_t *enc, SV *sv);
182		307
183	static void	308	static void
184	encode_av (enc_t *enc, AV *av)	309	encode_av (enc_t *enc, AV *av)
185	{	310	{
…		…
188	if (enc->depth >= enc->cbor.max_depth)	313	if (enc->depth >= enc->cbor.max_depth)
189	croak (ERR_NESTING_EXCEEDED);	314	croak (ERR_NESTING_EXCEEDED);
190		315
191	++enc->depth;	316	++enc->depth;
192		317
193	encode_uint (enc, 0x80, len + 1);	318	encode_uint (enc, MAJOR_ARRAY, len + 1);
194		319
195	for (i = 0; i <= len; ++i)	320	for (i = 0; i <= len; ++i)
196	{	321	{
197	SV **svp = av_fetch (av, i, 0);	322	SV **svp = av_fetch (av, i, 0);
198	encode_sv (enc, svp ? *svp : &PL_sv_undef);	323	encode_sv (enc, svp ? *svp : &PL_sv_undef);
…		…
213		338
214	int pairs = hv_iterinit (hv);	339	int pairs = hv_iterinit (hv);
215	int mg = SvMAGICAL (hv);	340	int mg = SvMAGICAL (hv);
216		341
217	if (mg)	342	if (mg)
218	encode_ch (enc, 0xa0 | 31);	343	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
219	else	344	else
220	encode_uint (enc, 0xa0, pairs);	345	encode_uint (enc, MAJOR_MAP, pairs);
221		346
222	while ((he = hv_iternext (hv)))	347	while ((he = hv_iternext (hv)))
223	{	348	{
224	if (HeKLEN (he) == HEf_SVKEY)	349	if (HeKLEN (he) == HEf_SVKEY)
225	encode_sv (enc, HeSVKEY (he));	350	encode_sv (enc, HeSVKEY (he));
226	else	351	else
227	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	352	encode_strref (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));
228		353
229	encode_sv (enc, expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	354	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
230	}	355	}
231		356
232	if (mg)	357	if (mg)
233	encode_ch (enc, 0xe0 | 31);	358	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
234		359
235	--enc->depth;	360	--enc->depth;
236	}	361	}
237		362
238	// encode objects, arrays and special \0=false and \1=true values.	363	// encode objects, arrays and special \0=false and \1=true values.
239	static void	364	static void
240	encode_rv (enc_t *enc, SV *sv)	365	encode_rv (enc_t *enc, SV *sv)
241	{	366	{
242	svtype svt;
243
244	SvGETMAGIC (sv);	367	SvGETMAGIC (sv);
		368
245	svt = SvTYPE (sv);	369	svtype svt = SvTYPE (sv);
246		370
247	if (expect_false (SvOBJECT (sv)))	371	if (ecb_expect_false (SvOBJECT (sv)))
248	{	372	{
249	HV *stash = !CBOR_SLOW || cbor_boolean_stash	373	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
250	? cbor_boolean_stash	374	? types_boolean_stash
		375	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		376	HV *error_stash = !CBOR_SLOW || types_error_stash
		377	? types_error_stash
		378	: gv_stashpv ("Types::Serialiser::Error", 1);
		379	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		380	? cbor_tagged_stash
251	: gv_stashpv ("CBOR::XS::Boolean", 1);	381	: gv_stashpv ("CBOR::XS::Tagged" , 1);
252		382
253	if (SvSTASH (sv) == stash)	383	HV *stash = SvSTASH (sv);
254	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	384
		385	if (stash == boolean_stash)
		386	{
		387	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		388	return;
		389	}
		390	else if (stash == error_stash)
		391	{
		392	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		393	return;
		394	}
		395	else if (stash == tagged_stash)
		396	{
		397	if (svt != SVt_PVAV)
		398	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		399
		400	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
		401	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		402
		403	return;
		404	}
		405	}
		406
		407	if (ecb_expect_false (SvREFCNT (sv) > 1)
		408	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		409	{
		410	if (!enc->shareable)
		411	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		412
		413	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		414
		415	if (SvOK (*svp))
		416	{
		417	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		418	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		419	return;
		420	}
255	else	421	else
256	{	422	{
257	#if 0 //TODO	423	sv_setuv (*svp, enc->shareable_idx);
258	if (enc->cbor.flags & F_CONV_BLESSED)	424	++enc->shareable_idx;
		425	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		426	}
		427	}
		428
		429	if (ecb_expect_false (SvOBJECT (sv)))
		430	{
		431	HV *stash = SvSTASH (sv);
		432	GV *method;
		433
		434	if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
259	{	435	{
		436	dSP;
		437
		438	ENTER; SAVETMPS; PUSHMARK (SP);
260	// we re-bless the reference to get overload and other niceties right	439	// 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)));	440	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
269		441
270	// calling with G_SCALAR ensures that we always get a 1 return value
271	PUTBACK;	442	PUTBACK;
		443	// G_SCALAR ensures that return value is 1
272	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	444	call_sv ((SV *)GvCV (method), G_SCALAR);
273	SPAGAIN;	445	SPAGAIN;
274		446
275	// catch this surprisingly common error	447	// catch this surprisingly common error
276	if (SvROK (TOPs) && SvRV (TOPs) == sv)	448	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)));	449	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
278		450
279	sv = POPs;
280	PUTBACK;
281
282	encode_sv (enc, sv);	451	encode_sv (enc, POPs);
283		452
		453	PUTBACK;
		454
284	FREETMPS; LEAVE;	455	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	}	456	}
292	else if (enc->cbor.flags & F_ALLOW_BLESSED)	457	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
293	encode_str (enc, "null", 4, 0);	458	{
		459	dSP;
		460
		461	ENTER; SAVETMPS; PUSHMARK (SP);
		462	EXTEND (SP, 2);
		463	// we re-bless the reference to get overload and other niceties right
		464	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		465	PUSHs (sv_cbor);
		466
		467	PUTBACK;
		468	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		469	SPAGAIN;
		470
		471	// catch this surprisingly common error
		472	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		473	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		474
		475	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		476	encode_uint (enc, MAJOR_ARRAY, count + 1);
		477	encode_strref (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		478
		479	while (count)
		480	encode_sv (enc, SP[1 - count--]);
		481
		482	PUTBACK;
		483
		484	FREETMPS; LEAVE;
		485	}
294	else	486	else
295	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	487	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
296	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	488	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
297	#endif
298	}
299	}	489	}
300	else if (svt == SVt_PVHV)	490	else if (svt == SVt_PVHV)
301	encode_hv (enc, (HV *)sv);	491	encode_hv (enc, (HV *)sv);
302	else if (svt == SVt_PVAV)	492	else if (svt == SVt_PVAV)
303	encode_av (enc, (AV *)sv);	493	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	494	else
322	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	495	{
323	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	496	encode_tag (enc, CBOR_TAG_INDIRECTION);
		497	encode_sv (enc, sv);
		498	}
324	}	499	}
325		500
326	static void	501	static void
327	encode_nv (enc_t *enc, SV *sv)	502	encode_nv (enc_t *enc, SV *sv)
328	{	503	{
329	double nv = SvNVX (sv);	504	double nv = SvNVX (sv);
330		505
331	need (enc, 9);	506	need (enc, 9);
332		507
333	if (expect_false (nv == (U32)nv))	508	if (ecb_expect_false (nv == (NV)(U32)nv))
334	encode_uint (enc, 0x00, (U32)nv);	509	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
335	//TODO: maybe I32?	510	//TODO: maybe I32?
336	else if (expect_false (nv == (float)nv))	511	else if (ecb_expect_false (nv == (float)nv))
337	{	512	{
338	uint32_t fp = ecb_float_to_binary32 (nv);	513	uint32_t fp = ecb_float_to_binary32 (nv);
339		514
340	*enc->cur++ = 0xe0 | 26;	515	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
341		516
342	if (!ecb_big_endian ())	517	if (!ecb_big_endian ())
343	fp = ecb_bswap32 (fp);	518	fp = ecb_bswap32 (fp);
344		519
345	memcpy (enc->cur, &fp, 4);	520	memcpy (enc->cur, &fp, 4);
…		…
347	}	522	}
348	else	523	else
349	{	524	{
350	uint64_t fp = ecb_double_to_binary64 (nv);	525	uint64_t fp = ecb_double_to_binary64 (nv);
351		526
352	*enc->cur++ = 0xe0 | 27;	527	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
353		528
354	if (!ecb_big_endian ())	529	if (!ecb_big_endian ())
355	fp = ecb_bswap64 (fp);	530	fp = ecb_bswap64 (fp);
356		531
357	memcpy (enc->cur, &fp, 8);	532	memcpy (enc->cur, &fp, 8);
…		…
366		541
367	if (SvPOKp (sv))	542	if (SvPOKp (sv))
368	{	543	{
369	STRLEN len;	544	STRLEN len;
370	char *str = SvPV (sv, len);	545	char *str = SvPV (sv, len);
371	encode_str (enc, SvUTF8 (sv), str, len);	546	encode_strref (enc, SvUTF8 (sv), str, len);
372	}	547	}
373	else if (SvNOKp (sv))	548	else if (SvNOKp (sv))
374	encode_nv (enc, sv);	549	encode_nv (enc, sv);
375	else if (SvIOKp (sv))	550	else if (SvIOKp (sv))
376	{	551	{
377	if (SvIsUV (sv))	552	if (SvIsUV (sv))
378	encode_uint (enc, 0x00, SvUVX (sv));	553	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
379	else if (SvIVX (sv) >= 0)	554	else if (SvIVX (sv) >= 0)
380	encode_uint (enc, 0x00, SvIVX (sv));	555	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
381	else	556	else
382	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	557	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
383	}	558	}
384	else if (SvROK (sv))	559	else if (SvROK (sv))
385	encode_rv (enc, SvRV (sv));	560	encode_rv (enc, SvRV (sv));
386	else if (!SvOK (sv))	561	else if (!SvOK (sv))
387	encode_ch (enc, 0xe0 | 22);	562	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
388	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	563	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
389	encode_ch (enc, 0xe0 | 23);	564	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
390	else	565	else
391	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	566	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
392	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	567	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
393	}	568	}
394		569
395	static SV *	570	static SV *
396	encode_cbor (SV *scalar, CBOR *cbor)	571	encode_cbor (SV *scalar, CBOR *cbor)
397	{	572	{
398	enc_t enc;	573	enc_t enc = { };
399		574
400	enc.cbor = *cbor;	575	enc.cbor = *cbor;
401	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	576	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
402	enc.cur = SvPVX (enc.sv);	577	enc.cur = SvPVX (enc.sv);
403	enc.end = SvEND (enc.sv);	578	enc.end = SvEND (enc.sv);
404	enc.depth = 0;
405		579
406	SvPOK_only (enc.sv);	580	SvPOK_only (enc.sv);
		581
		582	if (cbor->flags & F_PACK_STRINGS)
		583	{
		584	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		585	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		586	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		587	}
		588
407	encode_sv (&enc, scalar);	589	encode_sv (&enc, scalar);
408		590
409	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	591	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
410	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	592	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
411		593
…		…
425	U8 *end; // end of input string	607	U8 *end; // end of input string
426	const char *err; // parse error, if != 0	608	const char *err; // parse error, if != 0
427	CBOR cbor;	609	CBOR cbor;
428	U32 depth; // recursion depth	610	U32 depth; // recursion depth
429	U32 maxdepth; // recursion depth limit	611	U32 maxdepth; // recursion depth limit
		612	AV *shareable;
		613	AV *stringref;
		614	SV *decode_tagged;
430	} dec_t;	615	} dec_t;
431		616
432	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	617	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE
433		618
434	#define WANT(len) if (expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data");	619	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")
435		620
436	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	621	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)
437	#define DEC_DEC_DEPTH --dec->depth	622	#define DEC_DEC_DEPTH --dec->depth
438		623
439	static UV	624	static UV
440	decode_uint (dec_t *dec)	625	decode_uint (dec_t *dec)
441	{	626	{
442	switch (*dec->cur & 31)	627	U8 m = *dec->cur & MINOR_MASK;
443	{	628	++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		629
449	case 24:	630	if (ecb_expect_true (m < LENGTH_EXT1))
		631	return m;
		632	else if (ecb_expect_true (m == LENGTH_EXT1))
		633	{
450	WANT (2);	634	WANT (1);
451	dec->cur += 2;	635	dec->cur += 1;
452	return dec->cur[-1];	636	return dec->cur[-1];
453		637	}
454	case 25:	638	else if (ecb_expect_true (m == LENGTH_EXT2))
		639	{
455	WANT (3);	640	WANT (2);
456	dec->cur += 3;	641	dec->cur += 2;
457	return (((UV)dec->cur[-2]) << 8)	642	return (((UV)dec->cur[-2]) << 8)
458	| ((UV)dec->cur[-1]);	643	| ((UV)dec->cur[-1]);
459		644	}
460	case 26:	645	else if (ecb_expect_true (m == LENGTH_EXT4))
		646	{
461	WANT (5);	647	WANT (4);
462	dec->cur += 5;	648	dec->cur += 4;
463	return (((UV)dec->cur[-4]) << 24)	649	return (((UV)dec->cur[-4]) << 24)
464	| (((UV)dec->cur[-3]) << 16)	650	| (((UV)dec->cur[-3]) << 16)
465	| (((UV)dec->cur[-2]) << 8)	651	| (((UV)dec->cur[-2]) << 8)
466	| ((UV)dec->cur[-1]);	652	| ((UV)dec->cur[-1]);
467		653	}
468	case 27:	654	else if (ecb_expect_true (m == LENGTH_EXT8))
		655	{
469	WANT (9);	656	WANT (8);
470	dec->cur += 9;	657	dec->cur += 8;
		658
		659	return
		660	#if UVSIZE < 8
		661	0
		662	#else
471	return (((UV)dec->cur[-8]) << 56)	663	(((UV)dec->cur[-8]) << 56)
472	| (((UV)dec->cur[-7]) << 48)	664	| (((UV)dec->cur[-7]) << 48)
473	| (((UV)dec->cur[-6]) << 40)	665	| (((UV)dec->cur[-6]) << 40)
474	| (((UV)dec->cur[-5]) << 32)	666	| (((UV)dec->cur[-5]) << 32)
		667	#endif
475	| (((UV)dec->cur[-4]) << 24)	668	| (((UV)dec->cur[-4]) << 24)
476	| (((UV)dec->cur[-3]) << 16)	669	| (((UV)dec->cur[-3]) << 16)
477	| (((UV)dec->cur[-2]) << 8)	670	| (((UV)dec->cur[-2]) << 8)
478	| ((UV)dec->cur[-1]);	671	| ((UV)dec->cur[-1]);
479		672	}
480	default:	673	else
481	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	674	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
482	}
483		675
484	fail:	676	fail:
485	return 0;	677	return 0;
486	}	678	}
487		679
…		…
492	{	684	{
493	AV *av = newAV ();	685	AV *av = newAV ();
494		686
495	DEC_INC_DEPTH;	687	DEC_INC_DEPTH;
496		688
497	if ((*dec->cur & 31) == 31)	689	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
498	{	690	{
499	++dec->cur;	691	++dec->cur;
500		692
501	for (;;)	693	for (;;)
502	{	694	{
503	WANT (1);	695	WANT (1);
504		696
505	if (*dec->cur == (0xe0 | 31))	697	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
506	{	698	{
507	++dec->cur;	699	++dec->cur;
508	break;	700	break;
509	}	701	}
510		702
…		…
513	}	705	}
514	else	706	else
515	{	707	{
516	int i, len = decode_uint (dec);	708	int i, len = decode_uint (dec);
517		709
		710	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);	711	av_fill (av, len - 1);
519		712
520	for (i = 0; i < len; ++i)	713	for (i = 0; i < len; ++i)
521	AvARRAY (av)[i] = decode_sv (dec);	714	AvARRAY (av)[i] = decode_sv (dec);
522	}	715	}
…		…
528	SvREFCNT_dec (av);	721	SvREFCNT_dec (av);
529	DEC_DEC_DEPTH;	722	DEC_DEC_DEPTH;
530	return &PL_sv_undef;	723	return &PL_sv_undef;
531	}	724	}
532		725
		726	static void
		727	decode_he (dec_t *dec, HV *hv)
		728	{
		729	// for speed reasons, we specialcase single-string
		730	// byte or utf-8 strings as keys, but only when !stringref
		731
		732	if (ecb_expect_true (!dec->stringref))
		733	if (ecb_expect_true ((*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		734	{
		735	I32 len = decode_uint (dec);
		736	char *key = (char *)dec->cur;
		737
		738	dec->cur += len;
		739
		740	if (ecb_expect_false (dec->stringref))
		741	av_push (dec->stringref, newSVpvn (key, len));
		742
		743	hv_store (hv, key, len, decode_sv (dec), 0);
		744
		745	return;
		746	}
		747	else if (ecb_expect_true ((*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		748	{
		749	I32 len = decode_uint (dec);
		750	char *key = (char *)dec->cur;
		751
		752	dec->cur += len;
		753
		754	if (ecb_expect_false (dec->stringref))
		755	av_push (dec->stringref, newSVpvn_utf8 (key, len, 1));
		756
		757	hv_store (hv, key, -len, decode_sv (dec), 0);
		758
		759	return;
		760	}
		761
		762	SV *k = decode_sv (dec);
		763	SV *v = decode_sv (dec);
		764
		765	hv_store_ent (hv, k, v, 0);
		766	SvREFCNT_dec (k);
		767	}
		768
533	static SV *	769	static SV *
534	decode_hv (dec_t *dec)	770	decode_hv (dec_t *dec)
535	{	771	{
536	HV *hv = newHV ();	772	HV *hv = newHV ();
537		773
538	DEC_INC_DEPTH;	774	DEC_INC_DEPTH;
539		775
540	if ((*dec->cur & 31) == 31)	776	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
541	{	777	{
542	++dec->cur;	778	++dec->cur;
543		779
544	for (;;)	780	for (;;)
545	{	781	{
546	WANT (1);	782	WANT (1);
547		783
548	if (*dec->cur == (0xe0 | 31))	784	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
549	{	785	{
550	++dec->cur;	786	++dec->cur;
551	break;	787	break;
552	}	788	}
553		789
554	SV *k = decode_sv (dec);	790	decode_he (dec, hv);
555	SV *v = decode_sv (dec);
556
557	hv_store_ent (hv, k, v, 0);
558	}	791	}
559	}	792	}
560	else	793	else
561	{	794	{
562	int len = decode_uint (dec);	795	int pairs = decode_uint (dec);
563		796
564	while (len--)	797	while (pairs--)
565	{	798	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	}	799	}
572		800
573	DEC_DEC_DEPTH;	801	DEC_DEC_DEPTH;
574	return newRV_noinc ((SV *)hv);	802	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		803
731	fail:	804	fail:
732	SvREFCNT_dec (hv);	805	SvREFCNT_dec (hv);
733	DEC_DEC_DEPTH;	806	DEC_DEC_DEPTH;
734	return &PL_sv_undef;	807	return &PL_sv_undef;
735	}	808	}
736		809
737	static SV *	810	static SV *
738	decode_str (dec_t *dec, int utf8)	811	decode_str (dec_t *dec, int utf8)
739	{	812	{
740	SV *sv;	813	SV *sv = 0;
741		814
742	if ((*dec->cur & 31) == 31)	815	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
743	{	816	{
		817	// indefinite length strings
744	++dec->cur;	818	++dec->cur;
745		819
		820	U8 major = *dec->cur & MAJOR_MISC;
		821
746	sv = newSVpvn ("", 0);	822	sv = newSVpvn ("", 0);
747		823
748	// not very fast, and certainly not robust against illegal input
749	for (;;)	824	for (;;)
750	{	825	{
751	WANT (1);	826	WANT (1);
752		827
753	if (*dec->cur == (0xe0 | 31))	828	if ((*dec->cur - major) > LENGTH_EXT8)
		829	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
754	{	830	{
755	++dec->cur;	831	++dec->cur;
756	break;	832	break;
757	}	833	}
		834	else
		835	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
758		836
759	SV *sv2 = decode_sv (dec);	837	STRLEN len = decode_uint (dec);
760	sv_catsv (sv, sv2);	838
		839	WANT (len);
		840	sv_catpvn (sv, dec->cur, len);
		841	dec->cur += len;
761	}	842	}
762	}	843	}
763	else	844	else
764	{	845	{
765	STRLEN len = decode_uint (dec);	846	STRLEN len = decode_uint (dec);
766		847
767	WANT (len);	848	WANT (len);
768	sv = newSVpvn (dec->cur, len);	849	sv = newSVpvn (dec->cur, len);
769	dec->cur += len;	850	dec->cur += len;
		851
		852	if (ecb_expect_false (dec->stringref)
		853	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		854	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
770	}	855	}
771		856
772	if (utf8)	857	if (utf8)
773	SvUTF8_on (sv);	858	SvUTF8_on (sv);
774		859
775	return sv;	860	return sv;
776		861
777	fail:	862	fail:
		863	SvREFCNT_dec (sv);
778	return &PL_sv_undef;	864	return &PL_sv_undef;
779	}	865	}
780		866
781	static SV *	867	static SV *
782	decode_tagged (dec_t *dec)	868	decode_tagged (dec_t *dec)
783	{	869	{
		870	SV *sv = 0;
784	UV tag = decode_uint (dec);	871	UV tag = decode_uint (dec);
		872
		873	WANT (1);
		874
		875	switch (tag)
		876	{
		877	case CBOR_TAG_MAGIC:
		878	sv = decode_sv (dec);
		879	break;
		880
		881	case CBOR_TAG_INDIRECTION:
		882	sv = newRV_noinc (decode_sv (dec));
		883	break;
		884
		885	case CBOR_TAG_STRINGREF_NAMESPACE:
		886	{
		887	ENTER; SAVETMPS;
		888
		889	SAVESPTR (dec->stringref);
		890	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		891
		892	sv = decode_sv (dec);
		893
		894	FREETMPS; LEAVE;
		895	}
		896	break;
		897
		898	case CBOR_TAG_STRINGREF:
		899	{
		900	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		901	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		902
		903	UV idx = decode_uint (dec);
		904
		905	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		906	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		907
		908	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		909	}
		910	break;
		911
		912	case CBOR_TAG_VALUE_SHAREABLE:
		913	{
		914	if (ecb_expect_false (!dec->shareable))
		915	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		916
		917	sv = newSV (0);
		918	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		919
785	SV *sv = decode_sv (dec);	920	SV *osv = decode_sv (dec);
		921	sv_setsv (sv, osv);
		922	SvREFCNT_dec_NN (osv);
		923	}
		924	break;
786		925
787	if (tag == 55799) // 2.4.5 Self-Describe CBOR	926	case CBOR_TAG_VALUE_SHAREDREF:
		927	{
		928	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		929	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		930
		931	UV idx = decode_uint (dec);
		932
		933	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		934	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		935
		936	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		937	}
		938	break;
		939
		940	case CBOR_TAG_PERL_OBJECT:
		941	{
		942	sv = decode_sv (dec);
		943
		944	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		945	ERR ("corrupted CBOR data (non-array perl object)");
		946
		947	AV *av = (AV *)SvRV (sv);
		948	int len = av_len (av) + 1;
		949	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		950
		951	if (!stash)
		952	ERR ("cannot decode perl-object (package does not exist)");
		953
		954	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		955
		956	if (!method)
		957	ERR ("cannot decode perl-object (package does not have a THAW method)");
		958
		959	dSP;
		960
		961	ENTER; SAVETMPS; PUSHMARK (SP);
		962	EXTEND (SP, len + 1);
		963	// we re-bless the reference to get overload and other niceties right
		964	PUSHs (*av_fetch (av, 0, 1));
		965	PUSHs (sv_cbor);
		966
		967	int i;
		968
		969	for (i = 1; i < len; ++i)
		970	PUSHs (*av_fetch (av, i, 1));
		971
		972	PUTBACK;
		973	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		974	SPAGAIN;
		975
		976	if (SvTRUE (ERRSV))
		977	{
		978	FREETMPS; LEAVE;
		979	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		980	}
		981
		982	SvREFCNT_dec (sv);
		983	sv = SvREFCNT_inc (POPs);
		984
		985	PUTBACK;
		986
		987	FREETMPS; LEAVE;
		988	}
		989	break;
		990
		991	default:
		992	{
		993	sv = decode_sv (dec);
		994
		995	dSP;
		996	ENTER; SAVETMPS; PUSHMARK (SP);
		997	EXTEND (SP, 2);
		998	PUSHs (newSVuv (tag));
		999	PUSHs (sv);
		1000
		1001	PUTBACK;
		1002	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1003	SPAGAIN;
		1004
		1005	if (SvTRUE (ERRSV))
		1006	{
		1007	FREETMPS; LEAVE;
		1008	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1009	}
		1010
		1011	if (count)
		1012	{
		1013	SvREFCNT_dec (sv);
		1014	sv = SvREFCNT_inc (POPs);
		1015	}
		1016	else
		1017	{
		1018	AV *av = newAV ();
		1019	av_push (av, newSVuv (tag));
		1020	av_push (av, sv);
		1021
		1022	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1023	? cbor_tagged_stash
		1024	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1025	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1026	}
		1027
		1028	PUTBACK;
		1029
		1030	FREETMPS; LEAVE;
		1031	}
		1032	break;
		1033	}
		1034
788	return sv;	1035	return sv;
789		1036
790	AV *av = newAV ();	1037	fail:
791	av_push (av, newSVuv (tag));	1038	SvREFCNT_dec (sv);
792	av_push (av, sv);	1039	return &PL_sv_undef;
793	return newRV_noinc ((SV *)av);
794	}	1040	}
795		1041
796	static SV *	1042	static SV *
797	decode_sv (dec_t *dec)	1043	decode_sv (dec_t *dec)
798	{	1044	{
799	WANT (1);	1045	WANT (1);
800		1046
801	switch (*dec->cur >> 5)	1047	switch (*dec->cur >> MAJOR_SHIFT)
802	{	1048	{
803	case 0: // unsigned int	1049	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
804	//TODO: 64 bit values on 3 2bit perls	1050	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
805	return newSVuv (decode_uint (dec));	1051	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
806	case 1: // negative int	1052	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
807	return newSViv (-1 - (IV)decode_uint (dec));	1053	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
808	case 2: // octet string	1054	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
809	return decode_str (dec, 0);	1055	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
810	case 3: // utf-8 string	1056
811	return decode_str (dec, 1);	1057	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)	1058	switch (*dec->cur++ & MINOR_MASK)
820	{	1059	{
821	case 20:	1060	case SIMPLE_FALSE:
822	#if CBOR_SLOW	1061	#if CBOR_SLOW
823	cbor_false = get_bool ("CBOR::XS::false");	1062	types_false = get_bool ("Types::Serialiser::false");
824	#endif	1063	#endif
825	return newSVsv (cbor_false);	1064	return newSVsv (types_false);
826	case 21:	1065	case SIMPLE_TRUE:
827	#if CBOR_SLOW	1066	#if CBOR_SLOW
828	cbor_true = get_bool ("CBOR::XS::true");	1067	types_true = get_bool ("Types::Serialiser::true");
829	#endif	1068	#endif
830	return newSVsv (cbor_true);	1069	return newSVsv (types_true);
831	case 22:	1070	case SIMPLE_NULL:
832	return newSVsv (&PL_sv_undef);	1071	return newSVsv (&PL_sv_undef);
		1072	case SIMPLE_UNDEF:
		1073	#if CBOR_SLOW
		1074	types_error = get_bool ("Types::Serialiser::error");
		1075	#endif
		1076	return newSVsv (types_error);
833		1077
834	case 25:	1078	case MISC_FLOAT16:
835	{	1079	{
836	WANT (2);	1080	WANT (2);
837		1081
838	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1082	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
839	dec->cur += 2;	1083	dec->cur += 2;
840		1084
841	return newSVnv (ecb_binary16_to_float (fp));	1085	return newSVnv (ecb_binary16_to_float (fp));
842	}	1086	}
843		1087
844	case 26:	1088	case MISC_FLOAT32:
845	{	1089	{
846	uint32_t fp;	1090	uint32_t fp;
847	WANT (4);	1091	WANT (4);
848	memcpy (&fp, dec->cur, 4);	1092	memcpy (&fp, dec->cur, 4);
849	dec->cur += 4;	1093	dec->cur += 4;
…		…
852	fp = ecb_bswap32 (fp);	1096	fp = ecb_bswap32 (fp);
853		1097
854	return newSVnv (ecb_binary32_to_float (fp));	1098	return newSVnv (ecb_binary32_to_float (fp));
855	}	1099	}
856		1100
857	case 27:	1101	case MISC_FLOAT64:
858	{	1102	{
859	uint64_t fp;	1103	uint64_t fp;
860	WANT (8);	1104	WANT (8);
861	memcpy (&fp, dec->cur, 8);	1105	memcpy (&fp, dec->cur, 8);
862	dec->cur += 8;	1106	dec->cur += 8;
…		…
865	fp = ecb_bswap64 (fp);	1109	fp = ecb_bswap64 (fp);
866		1110
867	return newSVnv (ecb_binary64_to_double (fp));	1111	return newSVnv (ecb_binary64_to_double (fp));
868	}	1112	}
869		1113
870	// 0..19 unassigned	1114	// 0..19 unassigned simple
871	// 24 reserved + unassigned (reserved values are not encodable)	1115	// 24 reserved + unassigned (reserved values are not encodable)
872	default:	1116	default:
873	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1117	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");
874	}	1118	}
875		1119
876	break;	1120	break;
877	}	1121	}
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		1122
935	fail:	1123	fail:
936	return &PL_sv_undef;	1124	return &PL_sv_undef;
937	}	1125	}
938		1126
939	static SV *	1127	static SV *
940	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1128	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
941	{	1129	{
942	dec_t dec;	1130	dec_t dec = { };
943	SV *sv;	1131	SV *sv;
		1132	STRLEN len;
		1133	char *data = SvPVbyte (string, len);
944		1134
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)	1135	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",	1136	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);	1137	(unsigned long)len, (unsigned long)cbor->max_size);
976	}
977
978	sv_utf8_downgrade (string, 0);
979		1138
980	dec.cbor = *cbor;	1139	dec.cbor = *cbor;
981	dec.cur = (U8 *)SvPVX (string);	1140	dec.cur = (U8 *)data;
982	dec.end = (U8 *)SvEND (string);	1141	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		1142
989	sv = decode_sv (&dec);	1143	sv = decode_sv (&dec);
990		1144
991	if (offset_return)	1145	if (offset_return)
992	*offset_return = dec.cur;	1146	*offset_return = dec.cur;
…		…
996	dec.err = "garbage after CBOR object";	1150	dec.err = "garbage after CBOR object";
997		1151
998	if (dec.err)	1152	if (dec.err)
999	{	1153	{
1000	SvREFCNT_dec (sv);	1154	SvREFCNT_dec (sv);
1001	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1155	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
1002	}	1156	}
1003		1157
1004	sv = sv_2mortal (sv);	1158	sv = sv_2mortal (sv);
1005		1159
1006	return sv;	1160	return sv;
…		…
1012	MODULE = CBOR::XS PACKAGE = CBOR::XS	1166	MODULE = CBOR::XS PACKAGE = CBOR::XS
1013		1167
1014	BOOT:	1168	BOOT:
1015	{	1169	{
1016	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1170	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1017	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1171	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1018		1172
1019	cbor_true = get_bool ("CBOR::XS::true");	1173	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1020	cbor_false = get_bool ("CBOR::XS::false");	1174	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1175
		1176	types_true = get_bool ("Types::Serialiser::true" );
		1177	types_false = get_bool ("Types::Serialiser::false");
		1178	types_error = get_bool ("Types::Serialiser::error");
		1179
		1180	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1181
		1182	sv_cbor = newSVpv ("CBOR", 0);
		1183	SvREADONLY_on (sv_cbor);
1021	}	1184	}
1022		1185
1023	PROTOTYPES: DISABLE	1186	PROTOTYPES: DISABLE
1024		1187
1025	void CLONE (...)	1188	void CLONE (...)
1026	CODE:	1189	CODE:
1027	cbor_stash = 0;	1190	cbor_stash = 0;
		1191	cbor_tagged_stash = 0;
		1192	types_error_stash = 0;
1028	cbor_boolean_stash = 0;	1193	types_boolean_stash = 0;
1029		1194
1030	void new (char *klass)	1195	void new (char *klass)
1031	PPCODE:	1196	PPCODE:
1032	{	1197	{
1033	SV *pv = NEWSV (0, sizeof (CBOR));	1198	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1041		1206
1042	void shrink (CBOR *self, int enable = 1)	1207	void shrink (CBOR *self, int enable = 1)
1043	ALIAS:	1208	ALIAS:
1044	shrink = F_SHRINK	1209	shrink = F_SHRINK
1045	allow_unknown = F_ALLOW_UNKNOWN	1210	allow_unknown = F_ALLOW_UNKNOWN
		1211	allow_sharing = F_ALLOW_SHARING
		1212	pack_strings = F_PACK_STRINGS
1046	PPCODE:	1213	PPCODE:
1047	{	1214	{
1048	if (enable)	1215	if (enable)
1049	self->flags |= ix;	1216	self->flags |= ix;
1050	else	1217	else
…		…
1055		1222
1056	void get_shrink (CBOR *self)	1223	void get_shrink (CBOR *self)
1057	ALIAS:	1224	ALIAS:
1058	get_shrink = F_SHRINK	1225	get_shrink = F_SHRINK
1059	get_allow_unknown = F_ALLOW_UNKNOWN	1226	get_allow_unknown = F_ALLOW_UNKNOWN
		1227	get_allow_sharing = F_ALLOW_SHARING
		1228	get_pack_strings = F_PACK_STRINGS
1060	PPCODE:	1229	PPCODE:
1061	XPUSHs (boolSV (self->flags & ix));	1230	XPUSHs (boolSV (self->flags & ix));
1062		1231
1063	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1232	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1064	PPCODE:	1233	PPCODE:
…		…
1080	CODE:	1249	CODE:
1081	RETVAL = self->max_size;	1250	RETVAL = self->max_size;
1082	OUTPUT:	1251	OUTPUT:
1083	RETVAL	1252	RETVAL
1084		1253
1085	#if 0 //TODO	1254	void filter (CBOR *self, SV *filter = 0)
1086
1087	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1088	PPCODE:	1255	PPCODE:
1089	{
1090	SvREFCNT_dec (self->cb_object);	1256	SvREFCNT_dec (self->filter);
1091	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1257	self->filter = filter ? newSVsv (filter) : filter;
1092
1093	XPUSHs (ST (0));	1258	XPUSHs (ST (0));
1094	}
1095		1259
1096	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1260	SV *get_filter (CBOR *self)
1097	PPCODE:	1261	CODE:
1098	{	1262	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1099	if (!self->cb_sk_object)	1263	OUTPUT:
1100	self->cb_sk_object = newHV ();	1264	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		1265
1120	void encode (CBOR *self, SV *scalar)	1266	void encode (CBOR *self, SV *scalar)
1121	PPCODE:	1267	PPCODE:
1122	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1268	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1123	XPUSHs (scalar);	1269	XPUSHs (scalar);
…		…
1137	PUSHs (sv);	1283	PUSHs (sv);
1138	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1284	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1139	}	1285	}
1140		1286
1141	void DESTROY (CBOR *self)	1287	void DESTROY (CBOR *self)
1142	CODE:	1288	PPCODE:
1143	SvREFCNT_dec (self->cb_sk_object);	1289	cbor_free (self);
1144	SvREFCNT_dec (self->cb_object);
1145		1290
1146	PROTOTYPES: ENABLE	1291	PROTOTYPES: ENABLE
1147		1292
1148	void encode_cbor (SV *scalar)	1293	void encode_cbor (SV *scalar)
		1294	ALIAS:
		1295	encode_cbor = 0
		1296	encode_cbor_sharing = F_ALLOW_SHARING
1149	PPCODE:	1297	PPCODE:
1150	{	1298	{
1151	CBOR cbor;	1299	CBOR cbor;
1152	cbor_init (&cbor);	1300	cbor_init (&cbor);
		1301	cbor.flags |= ix;
1153	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1302	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1154	XPUSHs (scalar);	1303	XPUSHs (scalar);
1155	}	1304	}
1156		1305
1157	void decode_cbor (SV *cborstr)	1306	void decode_cbor (SV *cborstr)

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