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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.5 by root, Sat Oct 26 21:14:20 2013 UTC vs.
Revision 1.37 by root, Sat Nov 30 18:13:53 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_ALLOW_CYCLES 0x00000008UL
		103	#define F_PACK_STRINGS 0x00000010UL
16		104
17	#define INIT_SIZE 32 // initial scalar size to be allocated	105	#define INIT_SIZE 32 // initial scalar size to be allocated
18		106
19	#define SB do {	107	#define SB do {
20	#define SE } while (0)	108	#define SE } while (0)
…		…
31	#else	119	#else
32	# define CBOR_SLOW 0	120	# define CBOR_SLOW 0
33	# define CBOR_STASH cbor_stash	121	# define CBOR_STASH cbor_stash
34	#endif	122	#endif
35		123
36	static HV *cbor_stash, *cbor_boolean_stash; // CBOR::XS::	124	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
37	static SV *cbor_true, *cbor_false;	125	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
38		126
39	typedef struct {	127	typedef struct {
40	U32 flags;	128	U32 flags;
41	U32 max_depth;	129	U32 max_depth;
42	STRLEN max_size;	130	STRLEN max_size;
43		131	SV *filter;
44	SV *cb_object;
45	HV *cb_sk_object;
46	} CBOR;	132	} CBOR;
47		133
48	ecb_inline void	134	ecb_inline void
49	cbor_init (CBOR *cbor)	135	cbor_init (CBOR *cbor)
50	{	136	{
51	Zero (cbor, 1, CBOR);	137	Zero (cbor, 1, CBOR);
52	cbor->max_depth = 512;	138	cbor->max_depth = 512;
		139	}
		140
		141	ecb_inline void
		142	cbor_free (CBOR *cbor)
		143	{
		144	SvREFCNT_dec (cbor->filter);
53	}	145	}
54		146
55	/////////////////////////////////////////////////////////////////////////////	147	/////////////////////////////////////////////////////////////////////////////
56	// utility functions	148	// utility functions
57		149
…		…
79	SvPV_renew (sv, SvCUR (sv) + 1);	171	SvPV_renew (sv, SvCUR (sv) + 1);
80	#endif	172	#endif
81	}	173	}
82	}	174	}
83		175
84	/////////////////////////////////////////////////////////////////////////////	176	// minimum length of a string to be registered for stringref
85	// fp hell	177	ecb_inline int
86		178	minimum_string_length (UV idx)
87	//TODO	179	{
		180	return idx > 23
		181	? idx > 0xffU
		182	? idx > 0xffffU
		183	? idx > 0xffffffffU
		184	? 11
		185	: 7
		186	: 5
		187	: 4
		188	: 3;
		189	}
88		190
89	/////////////////////////////////////////////////////////////////////////////	191	/////////////////////////////////////////////////////////////////////////////
90	// encoder	192	// encoder
91		193
92	// structure used for encoding CBOR	194	// structure used for encoding CBOR
…		…
95	char *cur; // SvPVX (sv) + current output position	197	char *cur; // SvPVX (sv) + current output position
96	char *end; // SvEND (sv)	198	char *end; // SvEND (sv)
97	SV *sv; // result scalar	199	SV *sv; // result scalar
98	CBOR cbor;	200	CBOR cbor;
99	U32 depth; // recursion level	201	U32 depth; // recursion level
		202	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		203	UV stringref_idx;
		204	HV *shareable; // ptr => index, or 0
		205	UV shareable_idx;
100	} enc_t;	206	} enc_t;
101		207
102	ecb_inline void	208	ecb_inline void
103	need (enc_t *enc, STRLEN len)	209	need (enc_t *enc, STRLEN len)
104	{	210	{
…		…
121	static void	227	static void
122	encode_uint (enc_t *enc, int major, UV len)	228	encode_uint (enc_t *enc, int major, UV len)
123	{	229	{
124	need (enc, 9);	230	need (enc, 9);
125		231
126	if (len < 24)	232	if (ecb_expect_true (len < LENGTH_EXT1))
127	*enc->cur++ = major | len;	233	*enc->cur++ = major | len;
128	else if (len <= 0xff)	234	else if (ecb_expect_true (len <= 0xffU))
129	{	235	{
130	*enc->cur++ = major | 24;	236	*enc->cur++ = major | LENGTH_EXT1;
131	*enc->cur++ = len;	237	*enc->cur++ = len;
132	}	238	}
133	else if (len <= 0xffff)	239	else if (len <= 0xffffU)
134	{	240	{
135	*enc->cur++ = major | 25;	241	*enc->cur++ = major | LENGTH_EXT2;
136	*enc->cur++ = len >> 8;	242	*enc->cur++ = len >> 8;
137	*enc->cur++ = len;	243	*enc->cur++ = len;
138	}	244	}
139	else if (len <= 0xffffffff)	245	else if (len <= 0xffffffffU)
140	{	246	{
141	*enc->cur++ = major | 26;	247	*enc->cur++ = major | LENGTH_EXT4;
142	*enc->cur++ = len >> 24;	248	*enc->cur++ = len >> 24;
143	*enc->cur++ = len >> 16;	249	*enc->cur++ = len >> 16;
144	*enc->cur++ = len >> 8;	250	*enc->cur++ = len >> 8;
145	*enc->cur++ = len;	251	*enc->cur++ = len;
146	}	252	}
147	else	253	else
148	{	254	{
149	*enc->cur++ = major | 27;	255	*enc->cur++ = major | LENGTH_EXT8;
150	*enc->cur++ = len >> 56;	256	*enc->cur++ = len >> 56;
151	*enc->cur++ = len >> 48;	257	*enc->cur++ = len >> 48;
152	*enc->cur++ = len >> 40;	258	*enc->cur++ = len >> 40;
153	*enc->cur++ = len >> 32;	259	*enc->cur++ = len >> 32;
154	*enc->cur++ = len >> 24;	260	*enc->cur++ = len >> 24;
…		…
156	*enc->cur++ = len >> 8;	262	*enc->cur++ = len >> 8;
157	*enc->cur++ = len;	263	*enc->cur++ = len;
158	}	264	}
159	}	265	}
160		266
161	static void	267	ecb_inline void
		268	encode_tag (enc_t *enc, UV tag)
		269	{
		270	encode_uint (enc, MAJOR_TAG, tag);
		271	}
		272
		273	ecb_inline void
162	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	274	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)
163	{	275	{
164	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	276	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
165	need (enc, len);	277	need (enc, len);
166	memcpy (enc->cur, str, len);	278	memcpy (enc->cur, str, len);
167	enc->cur += len;	279	enc->cur += len;
168	}	280	}
169		281
		282	static void
		283	encode_strref (enc_t *enc, int utf8, char *str, STRLEN len)
		284	{
		285	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		286	{
		287	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		288
		289	if (SvOK (*svp))
		290	{
		291	// already registered, use stringref
		292	encode_tag (enc, CBOR_TAG_STRINGREF);
		293	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		294	return;
		295	}
		296	else if (len >= minimum_string_length (enc->stringref_idx))
		297	{
		298	// register only
		299	sv_setuv (*svp, enc->stringref_idx);
		300	++enc->stringref_idx;
		301	}
		302	}
		303
		304	encode_str (enc, utf8, str, len);
		305	}
		306
170	static void encode_sv (enc_t *enc, SV *sv);	307	static void encode_sv (enc_t *enc, SV *sv);
171		308
172	static void	309	static void
173	encode_av (enc_t *enc, AV *av)	310	encode_av (enc_t *enc, AV *av)
174	{	311	{
…		…
177	if (enc->depth >= enc->cbor.max_depth)	314	if (enc->depth >= enc->cbor.max_depth)
178	croak (ERR_NESTING_EXCEEDED);	315	croak (ERR_NESTING_EXCEEDED);
179		316
180	++enc->depth;	317	++enc->depth;
181		318
182	encode_uint (enc, 0x80, len + 1);	319	encode_uint (enc, MAJOR_ARRAY, len + 1);
183		320
184	for (i = 0; i <= len; ++i)	321	for (i = 0; i <= len; ++i)
185	{	322	{
186	SV **svp = av_fetch (av, i, 0);	323	SV **svp = av_fetch (av, i, 0);
187	encode_sv (enc, svp ? *svp : &PL_sv_undef);	324	encode_sv (enc, svp ? *svp : &PL_sv_undef);
…		…
202		339
203	int pairs = hv_iterinit (hv);	340	int pairs = hv_iterinit (hv);
204	int mg = SvMAGICAL (hv);	341	int mg = SvMAGICAL (hv);
205		342
206	if (mg)	343	if (mg)
207	encode_ch (enc, 0xa0 | 31);	344	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
208	else	345	else
209	encode_uint (enc, 0xa0, pairs);	346	encode_uint (enc, MAJOR_MAP, pairs);
210		347
211	while ((he = hv_iternext (hv)))	348	while ((he = hv_iternext (hv)))
212	{	349	{
213	if (HeKLEN (he) == HEf_SVKEY)	350	if (HeKLEN (he) == HEf_SVKEY)
214	encode_sv (enc, HeSVKEY (he));	351	encode_sv (enc, HeSVKEY (he));
215	else	352	else
216	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	353	encode_strref (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));
217		354
218	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	355	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
219	}	356	}
220		357
221	if (mg)	358	if (mg)
222	encode_ch (enc, 0xe0 | 31);	359	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
223		360
224	--enc->depth;	361	--enc->depth;
225	}	362	}
226		363
227	// encode objects, arrays and special \0=false and \1=true values.	364	// encode objects, arrays and special \0=false and \1=true values.
228	static void	365	static void
229	encode_rv (enc_t *enc, SV *sv)	366	encode_rv (enc_t *enc, SV *sv)
230	{	367	{
231	svtype svt;
232
233	SvGETMAGIC (sv);	368	SvGETMAGIC (sv);
		369
234	svt = SvTYPE (sv);	370	svtype svt = SvTYPE (sv);
235		371
236	if (ecb_expect_false (SvOBJECT (sv)))	372	if (ecb_expect_false (SvOBJECT (sv)))
237	{	373	{
238	HV *stash = !CBOR_SLOW || cbor_boolean_stash	374	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
239	? cbor_boolean_stash	375	? types_boolean_stash
		376	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		377	HV *error_stash = !CBOR_SLOW || types_error_stash
		378	? types_error_stash
		379	: gv_stashpv ("Types::Serialiser::Error", 1);
		380	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		381	? cbor_tagged_stash
240	: gv_stashpv ("CBOR::XS::Boolean", 1);	382	: gv_stashpv ("CBOR::XS::Tagged" , 1);
241		383
242	if (SvSTASH (sv) == stash)	384	HV *stash = SvSTASH (sv);
243	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	385
		386	if (stash == boolean_stash)
		387	{
		388	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		389	return;
		390	}
		391	else if (stash == error_stash)
		392	{
		393	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		394	return;
		395	}
		396	else if (stash == tagged_stash)
		397	{
		398	if (svt != SVt_PVAV)
		399	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		400
		401	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
		402	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		403
		404	return;
		405	}
		406	}
		407
		408	if (ecb_expect_false (SvREFCNT (sv) > 1)
		409	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		410	{
		411	if (!enc->shareable)
		412	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		413
		414	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		415
		416	if (SvOK (*svp))
		417	{
		418	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		419	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		420	return;
		421	}
244	else	422	else
245	{	423	{
246	#if 0 //TODO	424	sv_setuv (*svp, enc->shareable_idx);
247	if (enc->cbor.flags & F_CONV_BLESSED)	425	++enc->shareable_idx;
		426	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		427	}
		428	}
		429
		430	if (ecb_expect_false (SvOBJECT (sv)))
		431	{
		432	HV *stash = SvSTASH (sv);
		433	GV *method;
		434
		435	if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
248	{	436	{
		437	dSP;
		438
		439	ENTER; SAVETMPS; PUSHMARK (SP);
249	// we re-bless the reference to get overload and other niceties right	440	// we re-bless the reference to get overload and other niceties right
250	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
251
252	if (to_cbor)
253	{
254	dSP;
255
256	ENTER; SAVETMPS; PUSHMARK (SP);
257	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	441	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
258		442
259	// calling with G_SCALAR ensures that we always get a 1 return value
260	PUTBACK;	443	PUTBACK;
		444	// G_SCALAR ensures that return value is 1
261	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	445	call_sv ((SV *)GvCV (method), G_SCALAR);
262	SPAGAIN;	446	SPAGAIN;
263		447
264	// catch this surprisingly common error	448	// catch this surprisingly common error
265	if (SvROK (TOPs) && SvRV (TOPs) == sv)	449	if (SvROK (TOPs) && SvRV (TOPs) == sv)
266	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	450	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
267		451
268	sv = POPs;
269	PUTBACK;
270
271	encode_sv (enc, sv);	452	encode_sv (enc, POPs);
272		453
		454	PUTBACK;
		455
273	FREETMPS; LEAVE;	456	FREETMPS; LEAVE;
274	}
275	else if (enc->cbor.flags & F_ALLOW_BLESSED)
276	encode_str (enc, "null", 4, 0);
277	else
278	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it",
279	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
280	}	457	}
281	else if (enc->cbor.flags & F_ALLOW_BLESSED)	458	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
282	encode_str (enc, "null", 4, 0);	459	{
		460	dSP;
		461
		462	ENTER; SAVETMPS; PUSHMARK (SP);
		463	EXTEND (SP, 2);
		464	// we re-bless the reference to get overload and other niceties right
		465	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		466	PUSHs (sv_cbor);
		467
		468	PUTBACK;
		469	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		470	SPAGAIN;
		471
		472	// catch this surprisingly common error
		473	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		474	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		475
		476	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		477	encode_uint (enc, MAJOR_ARRAY, count + 1);
		478	encode_strref (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		479
		480	while (count)
		481	encode_sv (enc, SP[1 - count--]);
		482
		483	PUTBACK;
		484
		485	FREETMPS; LEAVE;
		486	}
283	else	487	else
284	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	488	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
285	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	489	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
286	#endif
287	}
288	}	490	}
289	else if (svt == SVt_PVHV)	491	else if (svt == SVt_PVHV)
290	encode_hv (enc, (HV *)sv);	492	encode_hv (enc, (HV *)sv);
291	else if (svt == SVt_PVAV)	493	else if (svt == SVt_PVAV)
292	encode_av (enc, (AV *)sv);	494	encode_av (enc, (AV *)sv);
293	else if (svt < SVt_PVAV)
294	{
295	STRLEN len = 0;
296	char *pv = svt ? SvPV (sv, len) : 0;
297
298	if (len == 1 && *pv == '1')
299	encode_ch (enc, 0xe0 | 21);
300	else if (len == 1 && *pv == '0')
301	encode_ch (enc, 0xe0 | 20);
302	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
303	encode_ch (enc, 0xe0 | 23);
304	else
305	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
306	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
307	}
308	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
309	encode_ch (enc, 0xe0 | 23);
310	else	495	else
311	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	496	{
312	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	497	encode_tag (enc, CBOR_TAG_INDIRECTION);
		498	encode_sv (enc, sv);
		499	}
313	}	500	}
314		501
315	static void	502	static void
316	encode_nv (enc_t *enc, SV *sv)	503	encode_nv (enc_t *enc, SV *sv)
317	{	504	{
318	double nv = SvNVX (sv);	505	double nv = SvNVX (sv);
319		506
320	need (enc, 9);	507	need (enc, 9);
321		508
322	if (ecb_expect_false (nv == (U32)nv))	509	if (ecb_expect_false (nv == (NV)(U32)nv))
323	encode_uint (enc, 0x00, (U32)nv);	510	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
324	//TODO: maybe I32?	511	//TODO: maybe I32?
325	else if (ecb_expect_false (nv == (float)nv))	512	else if (ecb_expect_false (nv == (float)nv))
326	{	513	{
327	uint32_t fp = ecb_float_to_binary32 (nv);	514	uint32_t fp = ecb_float_to_binary32 (nv);
328		515
329	*enc->cur++ = 0xe0 | 26;	516	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
330		517
331	if (!ecb_big_endian ())	518	if (!ecb_big_endian ())
332	fp = ecb_bswap32 (fp);	519	fp = ecb_bswap32 (fp);
333		520
334	memcpy (enc->cur, &fp, 4);	521	memcpy (enc->cur, &fp, 4);
…		…
336	}	523	}
337	else	524	else
338	{	525	{
339	uint64_t fp = ecb_double_to_binary64 (nv);	526	uint64_t fp = ecb_double_to_binary64 (nv);
340		527
341	*enc->cur++ = 0xe0 | 27;	528	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
342		529
343	if (!ecb_big_endian ())	530	if (!ecb_big_endian ())
344	fp = ecb_bswap64 (fp);	531	fp = ecb_bswap64 (fp);
345		532
346	memcpy (enc->cur, &fp, 8);	533	memcpy (enc->cur, &fp, 8);
…		…
355		542
356	if (SvPOKp (sv))	543	if (SvPOKp (sv))
357	{	544	{
358	STRLEN len;	545	STRLEN len;
359	char *str = SvPV (sv, len);	546	char *str = SvPV (sv, len);
360	encode_str (enc, SvUTF8 (sv), str, len);	547	encode_strref (enc, SvUTF8 (sv), str, len);
361	}	548	}
362	else if (SvNOKp (sv))	549	else if (SvNOKp (sv))
363	encode_nv (enc, sv);	550	encode_nv (enc, sv);
364	else if (SvIOKp (sv))	551	else if (SvIOKp (sv))
365	{	552	{
366	if (SvIsUV (sv))	553	if (SvIsUV (sv))
367	encode_uint (enc, 0x00, SvUVX (sv));	554	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
368	else if (SvIVX (sv) >= 0)	555	else if (SvIVX (sv) >= 0)
369	encode_uint (enc, 0x00, SvIVX (sv));	556	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
370	else	557	else
371	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	558	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
372	}	559	}
373	else if (SvROK (sv))	560	else if (SvROK (sv))
374	encode_rv (enc, SvRV (sv));	561	encode_rv (enc, SvRV (sv));
375	else if (!SvOK (sv))	562	else if (!SvOK (sv))
376	encode_ch (enc, 0xe0 | 22);	563	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
377	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	564	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
378	encode_ch (enc, 0xe0 | 23);	565	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
379	else	566	else
380	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	567	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
381	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	568	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
382	}	569	}
383		570
384	static SV *	571	static SV *
385	encode_cbor (SV *scalar, CBOR *cbor)	572	encode_cbor (SV *scalar, CBOR *cbor)
386	{	573	{
387	enc_t enc;	574	enc_t enc = { };
388		575
389	enc.cbor = *cbor;	576	enc.cbor = *cbor;
390	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	577	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
391	enc.cur = SvPVX (enc.sv);	578	enc.cur = SvPVX (enc.sv);
392	enc.end = SvEND (enc.sv);	579	enc.end = SvEND (enc.sv);
393	enc.depth = 0;
394		580
395	SvPOK_only (enc.sv);	581	SvPOK_only (enc.sv);
		582
		583	if (cbor->flags & F_PACK_STRINGS)
		584	{
		585	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		586	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		587	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		588	}
		589
396	encode_sv (&enc, scalar);	590	encode_sv (&enc, scalar);
397		591
398	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	592	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
399	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	593	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
400		594
…		…
414	U8 *end; // end of input string	608	U8 *end; // end of input string
415	const char *err; // parse error, if != 0	609	const char *err; // parse error, if != 0
416	CBOR cbor;	610	CBOR cbor;
417	U32 depth; // recursion depth	611	U32 depth; // recursion depth
418	U32 maxdepth; // recursion depth limit	612	U32 maxdepth; // recursion depth limit
		613	AV *shareable;
		614	AV *stringref;
		615	SV *decode_tagged;
419	} dec_t;	616	} dec_t;
420		617
421	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	618	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE
422		619
423	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	620	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")
…		…
426	#define DEC_DEC_DEPTH --dec->depth	623	#define DEC_DEC_DEPTH --dec->depth
427		624
428	static UV	625	static UV
429	decode_uint (dec_t *dec)	626	decode_uint (dec_t *dec)
430	{	627	{
431	switch (*dec->cur & 31)	628	U8 m = *dec->cur & MINOR_MASK;
432	{	629	++dec->cur;
433	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
434	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
435	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
436	return *dec->cur++ & 31;
437		630
438	case 24:	631	if (ecb_expect_true (m < LENGTH_EXT1))
		632	return m;
		633	else if (ecb_expect_true (m == LENGTH_EXT1))
		634	{
439	WANT (2);	635	WANT (1);
440	dec->cur += 2;	636	dec->cur += 1;
441	return dec->cur[-1];	637	return dec->cur[-1];
442		638	}
443	case 25:	639	else if (ecb_expect_true (m == LENGTH_EXT2))
		640	{
444	WANT (3);	641	WANT (2);
445	dec->cur += 3;	642	dec->cur += 2;
446	return (((UV)dec->cur[-2]) << 8)	643	return (((UV)dec->cur[-2]) << 8)
447	| ((UV)dec->cur[-1]);	644	| ((UV)dec->cur[-1]);
448		645	}
449	case 26:	646	else if (ecb_expect_true (m == LENGTH_EXT4))
		647	{
450	WANT (5);	648	WANT (4);
451	dec->cur += 5;	649	dec->cur += 4;
452	return (((UV)dec->cur[-4]) << 24)	650	return (((UV)dec->cur[-4]) << 24)
453	| (((UV)dec->cur[-3]) << 16)	651	| (((UV)dec->cur[-3]) << 16)
454	| (((UV)dec->cur[-2]) << 8)	652	| (((UV)dec->cur[-2]) << 8)
455	| ((UV)dec->cur[-1]);	653	| ((UV)dec->cur[-1]);
456		654	}
457	case 27:	655	else if (ecb_expect_true (m == LENGTH_EXT8))
		656	{
458	WANT (9);	657	WANT (8);
459	dec->cur += 9;	658	dec->cur += 8;
		659
		660	return
		661	#if UVSIZE < 8
		662	0
		663	#else
460	return (((UV)dec->cur[-8]) << 56)	664	(((UV)dec->cur[-8]) << 56)
461	| (((UV)dec->cur[-7]) << 48)	665	| (((UV)dec->cur[-7]) << 48)
462	| (((UV)dec->cur[-6]) << 40)	666	| (((UV)dec->cur[-6]) << 40)
463	| (((UV)dec->cur[-5]) << 32)	667	| (((UV)dec->cur[-5]) << 32)
		668	#endif
464	| (((UV)dec->cur[-4]) << 24)	669	| (((UV)dec->cur[-4]) << 24)
465	| (((UV)dec->cur[-3]) << 16)	670	| (((UV)dec->cur[-3]) << 16)
466	| (((UV)dec->cur[-2]) << 8)	671	| (((UV)dec->cur[-2]) << 8)
467	| ((UV)dec->cur[-1]);	672	| ((UV)dec->cur[-1]);
468		673	}
469	default:	674	else
470	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	675	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
471	}
472		676
473	fail:	677	fail:
474	return 0;	678	return 0;
475	}	679	}
476		680
…		…
481	{	685	{
482	AV *av = newAV ();	686	AV *av = newAV ();
483		687
484	DEC_INC_DEPTH;	688	DEC_INC_DEPTH;
485		689
486	if ((*dec->cur & 31) == 31)	690	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
487	{	691	{
488	++dec->cur;	692	++dec->cur;
489		693
490	for (;;)	694	for (;;)
491	{	695	{
492	WANT (1);	696	WANT (1);
493		697
494	if (*dec->cur == (0xe0 | 31))	698	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
495	{	699	{
496	++dec->cur;	700	++dec->cur;
497	break;	701	break;
498	}	702	}
499		703
…		…
502	}	706	}
503	else	707	else
504	{	708	{
505	int i, len = decode_uint (dec);	709	int i, len = decode_uint (dec);
506		710
		711	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
507	av_fill (av, len - 1);	712	av_fill (av, len - 1);
508		713
509	for (i = 0; i < len; ++i)	714	for (i = 0; i < len; ++i)
510	AvARRAY (av)[i] = decode_sv (dec);	715	AvARRAY (av)[i] = decode_sv (dec);
511	}	716	}
…		…
517	SvREFCNT_dec (av);	722	SvREFCNT_dec (av);
518	DEC_DEC_DEPTH;	723	DEC_DEC_DEPTH;
519	return &PL_sv_undef;	724	return &PL_sv_undef;
520	}	725	}
521		726
		727	static void
		728	decode_he (dec_t *dec, HV *hv)
		729	{
		730	// for speed reasons, we specialcase single-string
		731	// byte or utf-8 strings as keys, but only when !stringref
		732
		733	if (ecb_expect_true (!dec->stringref))
		734	if (ecb_expect_true ((*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		735	{
		736	I32 len = decode_uint (dec);
		737	char *key = (char *)dec->cur;
		738
		739	dec->cur += len;
		740
		741	if (ecb_expect_false (dec->stringref))
		742	av_push (dec->stringref, newSVpvn (key, len));
		743
		744	hv_store (hv, key, len, decode_sv (dec), 0);
		745
		746	return;
		747	}
		748	else if (ecb_expect_true ((*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		749	{
		750	I32 len = decode_uint (dec);
		751	char *key = (char *)dec->cur;
		752
		753	dec->cur += len;
		754
		755	if (ecb_expect_false (dec->stringref))
		756	av_push (dec->stringref, newSVpvn_utf8 (key, len, 1));
		757
		758	hv_store (hv, key, -len, decode_sv (dec), 0);
		759
		760	return;
		761	}
		762
		763	SV *k = decode_sv (dec);
		764	SV *v = decode_sv (dec);
		765
		766	hv_store_ent (hv, k, v, 0);
		767	SvREFCNT_dec (k);
		768	}
		769
522	static SV *	770	static SV *
523	decode_hv (dec_t *dec)	771	decode_hv (dec_t *dec)
524	{	772	{
525	HV *hv = newHV ();	773	HV *hv = newHV ();
526		774
527	DEC_INC_DEPTH;	775	DEC_INC_DEPTH;
528		776
529	if ((*dec->cur & 31) == 31)	777	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
530	{	778	{
531	++dec->cur;	779	++dec->cur;
532		780
533	for (;;)	781	for (;;)
534	{	782	{
535	WANT (1);	783	WANT (1);
536		784
537	if (*dec->cur == (0xe0 | 31))	785	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
538	{	786	{
539	++dec->cur;	787	++dec->cur;
540	break;	788	break;
541	}	789	}
542		790
543	SV *k = decode_sv (dec);	791	decode_he (dec, hv);
544	SV *v = decode_sv (dec);
545
546	hv_store_ent (hv, k, v, 0);
547	}	792	}
548	}	793	}
549	else	794	else
550	{	795	{
551	int len = decode_uint (dec);	796	int pairs = decode_uint (dec);
552		797
553	while (len--)	798	while (pairs--)
554	{	799	decode_he (dec, hv);
555	SV *k = decode_sv (dec);
556	SV *v = decode_sv (dec);
557
558	hv_store_ent (hv, k, v, 0);
559	}
560	}	800	}
561		801
562	DEC_DEC_DEPTH;	802	DEC_DEC_DEPTH;
563	return newRV_noinc ((SV *)hv);	803	return newRV_noinc ((SV *)hv);
564
565	#if 0
566	SV *sv;
567	HV *hv = newHV ();
568
569	DEC_INC_DEPTH;
570	decode_ws (dec);
571
572	for (;;)
573	{
574	// heuristic: assume that
575	// a) decode_str + hv_store_ent are abysmally slow.
576	// b) most hash keys are short, simple ascii text.
577	// => try to "fast-match" such strings to avoid
578	// the overhead of decode_str + hv_store_ent.
579	{
580	SV *value;
581	char *p = dec->cur;
582	char *e = p + 24; // only try up to 24 bytes
583
584	for (;;)
585	{
586	// the >= 0x80 is false on most architectures
587	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
588	{
589	// slow path, back up and use decode_str
590	SV *key = decode_str (dec);
591	if (!key)
592	goto fail;
593
594	decode_ws (dec); EXPECT_CH (':');
595
596	decode_ws (dec);
597	value = decode_sv (dec);
598	if (!value)
599	{
600	SvREFCNT_dec (key);
601	goto fail;
602	}
603
604	hv_store_ent (hv, key, value, 0);
605	SvREFCNT_dec (key);
606
607	break;
608	}
609	else if (*p == '"')
610	{
611	// fast path, got a simple key
612	char *key = dec->cur;
613	int len = p - key;
614	dec->cur = p + 1;
615
616	decode_ws (dec); EXPECT_CH (':');
617
618	decode_ws (dec);
619	value = decode_sv (dec);
620	if (!value)
621	goto fail;
622
623	hv_store (hv, key, len, value, 0);
624
625	break;
626	}
627
628	++p;
629	}
630	}
631
632	decode_ws (dec);
633
634	if (*dec->cur == '}')
635	{
636	++dec->cur;
637	break;
638	}
639
640	if (*dec->cur != ',')
641	ERR (", or } expected while parsing object/hash");
642
643	++dec->cur;
644
645	decode_ws (dec);
646
647	if (*dec->cur == '}' && dec->cbor.flags & F_RELAXED)
648	{
649	++dec->cur;
650	break;
651	}
652	}
653
654	DEC_DEC_DEPTH;
655	sv = newRV_noinc ((SV *)hv);
656
657	// check filter callbacks
658	if (dec->cbor.flags & F_HOOK)
659	{
660	if (dec->cbor.cb_sk_object && HvKEYS (hv) == 1)
661	{
662	HE *cb, *he;
663
664	hv_iterinit (hv);
665	he = hv_iternext (hv);
666	hv_iterinit (hv);
667
668	// the next line creates a mortal sv each time its called.
669	// might want to optimise this for common cases.
670	cb = hv_fetch_ent (dec->cbor.cb_sk_object, hv_iterkeysv (he), 0, 0);
671
672	if (cb)
673	{
674	dSP;
675	int count;
676
677	ENTER; SAVETMPS; PUSHMARK (SP);
678	XPUSHs (HeVAL (he));
679	sv_2mortal (sv);
680
681	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
682
683	if (count == 1)
684	{
685	sv = newSVsv (POPs);
686	FREETMPS; LEAVE;
687	return sv;
688	}
689
690	SvREFCNT_inc (sv);
691	FREETMPS; LEAVE;
692	}
693	}
694
695	if (dec->cbor.cb_object)
696	{
697	dSP;
698	int count;
699
700	ENTER; SAVETMPS; PUSHMARK (SP);
701	XPUSHs (sv_2mortal (sv));
702
703	PUTBACK; count = call_sv (dec->cbor.cb_object, G_ARRAY); SPAGAIN;
704
705	if (count == 1)
706	{
707	sv = newSVsv (POPs);
708	FREETMPS; LEAVE;
709	return sv;
710	}
711
712	SvREFCNT_inc (sv);
713	FREETMPS; LEAVE;
714	}
715	}
716
717	return sv;
718	#endif
719		804
720	fail:	805	fail:
721	SvREFCNT_dec (hv);	806	SvREFCNT_dec (hv);
722	DEC_DEC_DEPTH;	807	DEC_DEC_DEPTH;
723	return &PL_sv_undef;	808	return &PL_sv_undef;
724	}	809	}
725		810
726	static SV *	811	static SV *
727	decode_str (dec_t *dec, int utf8)	812	decode_str (dec_t *dec, int utf8)
728	{	813	{
729	SV *sv;	814	SV *sv = 0;
730		815
731	if ((*dec->cur & 31) == 31)	816	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
732	{	817	{
		818	// indefinite length strings
733	++dec->cur;	819	++dec->cur;
734		820
		821	U8 major = *dec->cur & MAJOR_MISC;
		822
735	sv = newSVpvn ("", 0);	823	sv = newSVpvn ("", 0);
736		824
737	// not very fast, and certainly not robust against illegal input
738	for (;;)	825	for (;;)
739	{	826	{
740	WANT (1);	827	WANT (1);
741		828
742	if (*dec->cur == (0xe0 | 31))	829	if ((*dec->cur - major) > LENGTH_EXT8)
		830	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
743	{	831	{
744	++dec->cur;	832	++dec->cur;
745	break;	833	break;
746	}	834	}
		835	else
		836	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
747		837
748	SV *sv2 = decode_sv (dec);	838	STRLEN len = decode_uint (dec);
749	sv_catsv (sv, sv2);	839
		840	WANT (len);
		841	sv_catpvn (sv, dec->cur, len);
		842	dec->cur += len;
750	}	843	}
751	}	844	}
752	else	845	else
753	{	846	{
754	STRLEN len = decode_uint (dec);	847	STRLEN len = decode_uint (dec);
755		848
756	WANT (len);	849	WANT (len);
757	sv = newSVpvn (dec->cur, len);	850	sv = newSVpvn (dec->cur, len);
758	dec->cur += len;	851	dec->cur += len;
		852
		853	if (ecb_expect_false (dec->stringref)
		854	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		855	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
759	}	856	}
760		857
761	if (utf8)	858	if (utf8)
762	SvUTF8_on (sv);	859	SvUTF8_on (sv);
763		860
764	return sv;	861	return sv;
765		862
766	fail:	863	fail:
		864	SvREFCNT_dec (sv);
767	return &PL_sv_undef;	865	return &PL_sv_undef;
768	}	866	}
769		867
770	static SV *	868	static SV *
771	decode_tagged (dec_t *dec)	869	decode_tagged (dec_t *dec)
772	{	870	{
		871	SV *sv = 0;
773	UV tag = decode_uint (dec);	872	UV tag = decode_uint (dec);
		873
		874	WANT (1);
		875
		876	switch (tag)
		877	{
		878	case CBOR_TAG_MAGIC:
774	SV *sv = decode_sv (dec);	879	sv = decode_sv (dec);
		880	break;
775		881
776	if (tag == 55799) // 2.4.5 Self-Describe CBOR	882	case CBOR_TAG_INDIRECTION:
		883	sv = newRV_noinc (decode_sv (dec));
		884	break;
		885
		886	case CBOR_TAG_STRINGREF_NAMESPACE:
		887	{
		888	ENTER; SAVETMPS;
		889
		890	SAVESPTR (dec->stringref);
		891	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		892
		893	sv = decode_sv (dec);
		894
		895	FREETMPS; LEAVE;
		896	}
		897	break;
		898
		899	case CBOR_TAG_STRINGREF:
		900	{
		901	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		902	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		903
		904	UV idx = decode_uint (dec);
		905
		906	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		907	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		908
		909	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		910	}
		911	break;
		912
		913	case CBOR_TAG_VALUE_SHAREABLE:
		914	{
		915	if (ecb_expect_false (!dec->shareable))
		916	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		917
		918	if (dec->cbor.flags & F_ALLOW_CYCLES)
		919	{
		920	sv = newSV (0);
		921	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		922
		923	SV *osv = decode_sv (dec);
		924	sv_setsv (sv, osv);
		925	SvREFCNT_dec_NN (osv);
		926	}
		927	else
		928	{
		929	av_push (dec->shareable, &PL_sv_undef);
		930	int idx = AvFILLp (dec->shareable);
		931	sv = decode_sv (dec);
		932	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		933	}
		934	}
		935	break;
		936
		937	case CBOR_TAG_VALUE_SHAREDREF:
		938	{
		939	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		940	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		941
		942	UV idx = decode_uint (dec);
		943
		944	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		945	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		946
		947	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		948
		949	if (sv == &PL_sv_undef)
		950	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		951	}
		952	break;
		953
		954	case CBOR_TAG_PERL_OBJECT:
		955	{
		956	sv = decode_sv (dec);
		957
		958	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		959	ERR ("corrupted CBOR data (non-array perl object)");
		960
		961	AV *av = (AV *)SvRV (sv);
		962	int len = av_len (av) + 1;
		963	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		964
		965	if (!stash)
		966	ERR ("cannot decode perl-object (package does not exist)");
		967
		968	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		969
		970	if (!method)
		971	ERR ("cannot decode perl-object (package does not have a THAW method)");
		972
		973	dSP;
		974
		975	ENTER; SAVETMPS; PUSHMARK (SP);
		976	EXTEND (SP, len + 1);
		977	// we re-bless the reference to get overload and other niceties right
		978	PUSHs (*av_fetch (av, 0, 1));
		979	PUSHs (sv_cbor);
		980
		981	int i;
		982
		983	for (i = 1; i < len; ++i)
		984	PUSHs (*av_fetch (av, i, 1));
		985
		986	PUTBACK;
		987	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		988	SPAGAIN;
		989
		990	if (SvTRUE (ERRSV))
		991	{
		992	FREETMPS; LEAVE;
		993	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		994	}
		995
		996	SvREFCNT_dec (sv);
		997	sv = SvREFCNT_inc (POPs);
		998
		999	PUTBACK;
		1000
		1001	FREETMPS; LEAVE;
		1002	}
		1003	break;
		1004
		1005	default:
		1006	{
		1007	sv = decode_sv (dec);
		1008
		1009	dSP;
		1010	ENTER; SAVETMPS; PUSHMARK (SP);
		1011	EXTEND (SP, 2);
		1012	PUSHs (newSVuv (tag));
		1013	PUSHs (sv);
		1014
		1015	PUTBACK;
		1016	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1017	SPAGAIN;
		1018
		1019	if (SvTRUE (ERRSV))
		1020	{
		1021	FREETMPS; LEAVE;
		1022	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1023	}
		1024
		1025	if (count)
		1026	{
		1027	SvREFCNT_dec (sv);
		1028	sv = SvREFCNT_inc (POPs);
		1029	}
		1030	else
		1031	{
		1032	AV *av = newAV ();
		1033	av_push (av, newSVuv (tag));
		1034	av_push (av, sv);
		1035
		1036	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1037	? cbor_tagged_stash
		1038	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1039	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1040	}
		1041
		1042	PUTBACK;
		1043
		1044	FREETMPS; LEAVE;
		1045	}
		1046	break;
		1047	}
		1048
777	return sv;	1049	return sv;
778		1050
779	AV *av = newAV ();	1051	fail:
780	av_push (av, newSVuv (tag));	1052	SvREFCNT_dec (sv);
781	av_push (av, sv);	1053	return &PL_sv_undef;
782	return newRV_noinc ((SV *)av);
783	}	1054	}
784		1055
785	static SV *	1056	static SV *
786	decode_sv (dec_t *dec)	1057	decode_sv (dec_t *dec)
787	{	1058	{
788	WANT (1);	1059	WANT (1);
789		1060
790	switch (*dec->cur >> 5)	1061	switch (*dec->cur >> MAJOR_SHIFT)
791	{	1062	{
792	case 0: // unsigned int	1063	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
793	//TODO: 64 bit values on 3 2bit perls	1064	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
794	return newSVuv (decode_uint (dec));	1065	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
795	case 1: // negative int	1066	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
796	return newSViv (-1 - (IV)decode_uint (dec));	1067	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
797	case 2: // octet string	1068	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
798	return decode_str (dec, 0);	1069	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
799	case 3: // utf-8 string	1070
800	return decode_str (dec, 1);	1071	case MAJOR_MISC >> MAJOR_SHIFT:
801	case 4: // array
802	return decode_av (dec);
803	case 5: // map
804	return decode_hv (dec);
805	case 6: // tag
806	return decode_tagged (dec);
807	case 7: // misc
808	switch (*dec->cur++ & 31)	1072	switch (*dec->cur++ & MINOR_MASK)
809	{	1073	{
810	case 20:	1074	case SIMPLE_FALSE:
811	#if CBOR_SLOW	1075	#if CBOR_SLOW
812	cbor_false = get_bool ("CBOR::XS::false");	1076	types_false = get_bool ("Types::Serialiser::false");
813	#endif	1077	#endif
814	return newSVsv (cbor_false);	1078	return newSVsv (types_false);
815	case 21:	1079	case SIMPLE_TRUE:
816	#if CBOR_SLOW	1080	#if CBOR_SLOW
817	cbor_true = get_bool ("CBOR::XS::true");	1081	types_true = get_bool ("Types::Serialiser::true");
818	#endif	1082	#endif
819	return newSVsv (cbor_true);	1083	return newSVsv (types_true);
820	case 22:	1084	case SIMPLE_NULL:
821	return newSVsv (&PL_sv_undef);	1085	return newSVsv (&PL_sv_undef);
		1086	case SIMPLE_UNDEF:
		1087	#if CBOR_SLOW
		1088	types_error = get_bool ("Types::Serialiser::error");
		1089	#endif
		1090	return newSVsv (types_error);
822		1091
823	case 25:	1092	case MISC_FLOAT16:
824	{	1093	{
825	WANT (2);	1094	WANT (2);
826		1095
827	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1096	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
828	dec->cur += 2;	1097	dec->cur += 2;
829		1098
830	return newSVnv (ecb_binary16_to_float (fp));	1099	return newSVnv (ecb_binary16_to_float (fp));
831	}	1100	}
832		1101
833	case 26:	1102	case MISC_FLOAT32:
834	{	1103	{
835	uint32_t fp;	1104	uint32_t fp;
836	WANT (4);	1105	WANT (4);
837	memcpy (&fp, dec->cur, 4);	1106	memcpy (&fp, dec->cur, 4);
838	dec->cur += 4;	1107	dec->cur += 4;
…		…
841	fp = ecb_bswap32 (fp);	1110	fp = ecb_bswap32 (fp);
842		1111
843	return newSVnv (ecb_binary32_to_float (fp));	1112	return newSVnv (ecb_binary32_to_float (fp));
844	}	1113	}
845		1114
846	case 27:	1115	case MISC_FLOAT64:
847	{	1116	{
848	uint64_t fp;	1117	uint64_t fp;
849	WANT (8);	1118	WANT (8);
850	memcpy (&fp, dec->cur, 8);	1119	memcpy (&fp, dec->cur, 8);
851	dec->cur += 8;	1120	dec->cur += 8;
…		…
854	fp = ecb_bswap64 (fp);	1123	fp = ecb_bswap64 (fp);
855		1124
856	return newSVnv (ecb_binary64_to_double (fp));	1125	return newSVnv (ecb_binary64_to_double (fp));
857	}	1126	}
858		1127
859	// 0..19 unassigned	1128	// 0..19 unassigned simple
860	// 24 reserved + unassigned (reserved values are not encodable)	1129	// 24 reserved + unassigned (reserved values are not encodable)
861	default:	1130	default:
862	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1131	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");
863	}	1132	}
864		1133
865	break;	1134	break;
866	}	1135	}
867	#if 0
868	switch (*dec->cur)
869	{
870	//case '"': ++dec->cur; return decode_str (dec);
871	case '[': ++dec->cur; return decode_av (dec);
872	case '{': ++dec->cur; return decode_hv (dec);
873
874	case '-':
875	case '0': case '1': case '2': case '3': case '4':
876	case '5': case '6': case '7': case '8': case '9':
877	//TODO return decode_num (dec);
878
879	case 't':
880	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
881	{
882	dec->cur += 4;
883	#if CBOR_SLOW
884	cbor_true = get_bool ("CBOR::XS::true");
885	#endif
886	return newSVsv (cbor_true);
887	}
888	else
889	ERR ("'true' expected");
890
891	break;
892
893	case 'f':
894	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
895	{
896	dec->cur += 5;
897	#if CBOR_SLOW
898	cbor_false = get_bool ("CBOR::XS::false");
899	#endif
900	return newSVsv (cbor_false);
901	}
902	else
903	ERR ("'false' expected");
904
905	break;
906
907	case 'n':
908	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
909	{
910	dec->cur += 4;
911	return newSVsv (&PL_sv_undef);
912	}
913	else
914	ERR ("'null' expected");
915
916	break;
917
918	default:
919	ERR ("malformed CBOR string, neither array, object, number, string or atom");
920	break;
921	}
922	#endif
923		1136
924	fail:	1137	fail:
925	return &PL_sv_undef;	1138	return &PL_sv_undef;
926	}	1139	}
927		1140
928	static SV *	1141	static SV *
929	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1142	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
930	{	1143	{
931	dec_t dec;	1144	dec_t dec = { };
932	SV *sv;	1145	SV *sv;
		1146	STRLEN len;
		1147	char *data = SvPVbyte (string, len);
933		1148
934	/* work around bugs in 5.10 where manipulating magic values
935	* makes perl ignore the magic in subsequent accesses.
936	* also make a copy of non-PV values, to get them into a clean
937	* state (SvPV should do that, but it's buggy, see below).
938	*/
939	/*SvGETMAGIC (string);*/
940	if (SvMAGICAL (string) || !SvPOK (string))
941	string = sv_2mortal (newSVsv (string));
942
943	SvUPGRADE (string, SVt_PV);
944
945	/* work around a bug in perl 5.10, which causes SvCUR to fail an
946	* assertion with -DDEBUGGING, although SvCUR is documented to
947	* return the xpv_cur field which certainly exists after upgrading.
948	* according to nicholas clark, calling SvPOK fixes this.
949	* But it doesn't fix it, so try another workaround, call SvPV_nolen
950	* and hope for the best.
951	* Damnit, SvPV_nolen still trips over yet another assertion. This
952	* assertion business is seriously broken, try yet another workaround
953	* for the broken -DDEBUGGING.
954	*/
955	{
956	#ifdef DEBUGGING
957	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
958	#else
959	STRLEN offset = SvCUR (string);
960	#endif
961
962	if (offset > cbor->max_size && cbor->max_size)	1149	if (len > cbor->max_size && cbor->max_size)
963	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1150	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
964	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1151	(unsigned long)len, (unsigned long)cbor->max_size);
965	}
966
967	sv_utf8_downgrade (string, 0);
968		1152
969	dec.cbor = *cbor;	1153	dec.cbor = *cbor;
970	dec.cur = (U8 *)SvPVX (string);	1154	dec.cur = (U8 *)data;
971	dec.end = (U8 *)SvEND (string);	1155	dec.end = (U8 *)data + len;
972	dec.err = 0;
973	dec.depth = 0;
974
975	if (dec.cbor.cb_object || dec.cbor.cb_sk_object)
976	;//TODO dec.cbor.flags |= F_HOOK;
977		1156
978	sv = decode_sv (&dec);	1157	sv = decode_sv (&dec);
979		1158
980	if (offset_return)	1159	if (offset_return)
981	*offset_return = dec.cur;	1160	*offset_return = dec.cur;
…		…
985	dec.err = "garbage after CBOR object";	1164	dec.err = "garbage after CBOR object";
986		1165
987	if (dec.err)	1166	if (dec.err)
988	{	1167	{
989	SvREFCNT_dec (sv);	1168	SvREFCNT_dec (sv);
990	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1169	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
991	}	1170	}
992		1171
993	sv = sv_2mortal (sv);	1172	sv = sv_2mortal (sv);
994		1173
995	return sv;	1174	return sv;
…		…
1001	MODULE = CBOR::XS PACKAGE = CBOR::XS	1180	MODULE = CBOR::XS PACKAGE = CBOR::XS
1002		1181
1003	BOOT:	1182	BOOT:
1004	{	1183	{
1005	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1184	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1006	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1185	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1007		1186
1008	cbor_true = get_bool ("CBOR::XS::true");	1187	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1009	cbor_false = get_bool ("CBOR::XS::false");	1188	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1189
		1190	types_true = get_bool ("Types::Serialiser::true" );
		1191	types_false = get_bool ("Types::Serialiser::false");
		1192	types_error = get_bool ("Types::Serialiser::error");
		1193
		1194	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1195
		1196	sv_cbor = newSVpv ("CBOR", 0);
		1197	SvREADONLY_on (sv_cbor);
1010	}	1198	}
1011		1199
1012	PROTOTYPES: DISABLE	1200	PROTOTYPES: DISABLE
1013		1201
1014	void CLONE (...)	1202	void CLONE (...)
1015	CODE:	1203	CODE:
1016	cbor_stash = 0;	1204	cbor_stash = 0;
		1205	cbor_tagged_stash = 0;
		1206	types_error_stash = 0;
1017	cbor_boolean_stash = 0;	1207	types_boolean_stash = 0;
1018		1208
1019	void new (char *klass)	1209	void new (char *klass)
1020	PPCODE:	1210	PPCODE:
1021	{	1211	{
1022	SV *pv = NEWSV (0, sizeof (CBOR));	1212	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1030		1220
1031	void shrink (CBOR *self, int enable = 1)	1221	void shrink (CBOR *self, int enable = 1)
1032	ALIAS:	1222	ALIAS:
1033	shrink = F_SHRINK	1223	shrink = F_SHRINK
1034	allow_unknown = F_ALLOW_UNKNOWN	1224	allow_unknown = F_ALLOW_UNKNOWN
		1225	allow_sharing = F_ALLOW_SHARING
		1226	allow_cycles = F_ALLOW_CYCLES
		1227	pack_strings = F_PACK_STRINGS
1035	PPCODE:	1228	PPCODE:
1036	{	1229	{
1037	if (enable)	1230	if (enable)
1038	self->flags |= ix;	1231	self->flags |= ix;
1039	else	1232	else
…		…
1044		1237
1045	void get_shrink (CBOR *self)	1238	void get_shrink (CBOR *self)
1046	ALIAS:	1239	ALIAS:
1047	get_shrink = F_SHRINK	1240	get_shrink = F_SHRINK
1048	get_allow_unknown = F_ALLOW_UNKNOWN	1241	get_allow_unknown = F_ALLOW_UNKNOWN
		1242	get_allow_sharing = F_ALLOW_SHARING
		1243	get_allow_cycles = F_ALLOW_CYCLES
		1244	get_pack_strings = F_PACK_STRINGS
1049	PPCODE:	1245	PPCODE:
1050	XPUSHs (boolSV (self->flags & ix));	1246	XPUSHs (boolSV (self->flags & ix));
1051		1247
1052	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1248	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1053	PPCODE:	1249	PPCODE:
…		…
1069	CODE:	1265	CODE:
1070	RETVAL = self->max_size;	1266	RETVAL = self->max_size;
1071	OUTPUT:	1267	OUTPUT:
1072	RETVAL	1268	RETVAL
1073		1269
1074	#if 0 //TODO	1270	void filter (CBOR *self, SV *filter = 0)
1075
1076	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1077	PPCODE:	1271	PPCODE:
1078	{
1079	SvREFCNT_dec (self->cb_object);	1272	SvREFCNT_dec (self->filter);
1080	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1273	self->filter = filter ? newSVsv (filter) : filter;
1081
1082	XPUSHs (ST (0));	1274	XPUSHs (ST (0));
1083	}
1084		1275
1085	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1276	SV *get_filter (CBOR *self)
1086	PPCODE:	1277	CODE:
1087	{	1278	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1088	if (!self->cb_sk_object)	1279	OUTPUT:
1089	self->cb_sk_object = newHV ();	1280	RETVAL
1090
1091	if (SvOK (cb))
1092	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1093	else
1094	{
1095	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1096
1097	if (!HvKEYS (self->cb_sk_object))
1098	{
1099	SvREFCNT_dec (self->cb_sk_object);
1100	self->cb_sk_object = 0;
1101	}
1102	}
1103
1104	XPUSHs (ST (0));
1105	}
1106
1107	#endif
1108		1281
1109	void encode (CBOR *self, SV *scalar)	1282	void encode (CBOR *self, SV *scalar)
1110	PPCODE:	1283	PPCODE:
1111	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1284	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1112	XPUSHs (scalar);	1285	XPUSHs (scalar);
…		…
1126	PUSHs (sv);	1299	PUSHs (sv);
1127	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1300	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1128	}	1301	}
1129		1302
1130	void DESTROY (CBOR *self)	1303	void DESTROY (CBOR *self)
1131	CODE:	1304	PPCODE:
1132	SvREFCNT_dec (self->cb_sk_object);	1305	cbor_free (self);
1133	SvREFCNT_dec (self->cb_object);
1134		1306
1135	PROTOTYPES: ENABLE	1307	PROTOTYPES: ENABLE
1136		1308
1137	void encode_cbor (SV *scalar)	1309	void encode_cbor (SV *scalar)
		1310	ALIAS:
		1311	encode_cbor = 0
		1312	encode_cbor_sharing = F_ALLOW_SHARING
1138	PPCODE:	1313	PPCODE:
1139	{	1314	{
1140	CBOR cbor;	1315	CBOR cbor;
1141	cbor_init (&cbor);	1316	cbor_init (&cbor);
		1317	cbor.flags |= ix;
1142	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1318	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1143	XPUSHs (scalar);	1319	XPUSHs (scalar);
1144	}	1320	}
1145		1321
1146	void decode_cbor (SV *cborstr)	1322	void decode_cbor (SV *cborstr)

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