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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.1 by root, Fri Oct 25 23:09:45 2013 UTC vs.
Revision 1.35 by root, Sat Nov 30 17:19:34 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	#if defined(__BORLANDC__) || defined(_MSC_VER)	14	// compatibility with perl <5.18
15	# define snprintf _snprintf // C compilers have this in stdio.h	15	#ifndef HvNAMELEN_get
		16	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
16	#endif	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
17		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
18	#define F_SHRINK 0x00000200UL	99	#define F_SHRINK 0x00000001UL
19	#define F_ALLOW_UNKNOWN 0x00002000UL	100	#define F_ALLOW_UNKNOWN 0x00000002UL
		101	#define F_ALLOW_SHARING 0x00000004UL
		102	#define F_PACK_STRINGS 0x00000008UL
20		103
21	#define INIT_SIZE 32 // initial scalar size to be allocated	104	#define INIT_SIZE 32 // initial scalar size to be allocated
22		105
23	#define SB do {	106	#define SB do {
24	#define SE } while (0)	107	#define SE } while (0)
25
26	#if __GNUC__ >= 3
27	# define expect(expr,value) __builtin_expect ((expr), (value))
28	# define INLINE static inline
29	#else
30	# define expect(expr,value) (expr)
31	# define INLINE static
32	#endif
33
34	#define expect_false(expr) expect ((expr) != 0, 0)
35	#define expect_true(expr) expect ((expr) != 0, 1)
36		108
37	#define IN_RANGE_INC(type,val,beg,end) \	109	#define IN_RANGE_INC(type,val,beg,end) \
38	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \	110	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
39	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))	111	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
40		112
…		…
46	#else	118	#else
47	# define CBOR_SLOW 0	119	# define CBOR_SLOW 0
48	# define CBOR_STASH cbor_stash	120	# define CBOR_STASH cbor_stash
49	#endif	121	#endif
50		122
51	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::
52	static SV *cbor_true, *cbor_false;	124	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
53		125
54	typedef struct {	126	typedef struct {
55	U32 flags;	127	U32 flags;
56	U32 max_depth;	128	U32 max_depth;
57	STRLEN max_size;	129	STRLEN max_size;
58		130	SV *filter;
59	SV *cb_object;
60	HV *cb_sk_object;
61	} CBOR;	131	} CBOR;
62		132
63	INLINE void	133	ecb_inline void
64	cbor_init (CBOR *cbor)	134	cbor_init (CBOR *cbor)
65	{	135	{
66	Zero (cbor, 1, CBOR);	136	Zero (cbor, 1, CBOR);
67	cbor->max_depth = 512;	137	cbor->max_depth = 512;
68	}	138	}
69		139
		140	ecb_inline void
		141	cbor_free (CBOR *cbor)
		142	{
		143	SvREFCNT_dec (cbor->filter);
		144	}
		145
70	/////////////////////////////////////////////////////////////////////////////	146	/////////////////////////////////////////////////////////////////////////////
71	// utility functions	147	// utility functions
72		148
73	INLINE SV *	149	ecb_inline SV *
74	get_bool (const char *name)	150	get_bool (const char *name)
75	{	151	{
76	SV *sv = get_sv (name, 1);	152	SV *sv = get_sv (name, 1);
77		153
78	SvREADONLY_on (sv);	154	SvREADONLY_on (sv);
79	SvREADONLY_on (SvRV (sv));	155	SvREADONLY_on (SvRV (sv));
80		156
81	return sv;	157	return sv;
82	}	158	}
83		159
84	INLINE void	160	ecb_inline void
85	shrink (SV *sv)	161	shrink (SV *sv)
86	{	162	{
87	sv_utf8_downgrade (sv, 1);	163	sv_utf8_downgrade (sv, 1);
88		164
89	if (SvLEN (sv) > SvCUR (sv) + 1)	165	if (SvLEN (sv) > SvCUR (sv) + 1)
…		…
94	SvPV_renew (sv, SvCUR (sv) + 1);	170	SvPV_renew (sv, SvCUR (sv) + 1);
95	#endif	171	#endif
96	}	172	}
97	}	173	}
98		174
99	/////////////////////////////////////////////////////////////////////////////	175	// minimum length of a string to be registered for stringref
100	// fp hell	176	ecb_inline int
101		177	minimum_string_length (UV idx)
102	//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	}
103		189
104	/////////////////////////////////////////////////////////////////////////////	190	/////////////////////////////////////////////////////////////////////////////
105	// encoder	191	// encoder
106		192
107	// structure used for encoding CBOR	193	// structure used for encoding CBOR
…		…
110	char *cur; // SvPVX (sv) + current output position	196	char *cur; // SvPVX (sv) + current output position
111	char *end; // SvEND (sv)	197	char *end; // SvEND (sv)
112	SV *sv; // result scalar	198	SV *sv; // result scalar
113	CBOR cbor;	199	CBOR cbor;
114	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;
115	} enc_t;	205	} enc_t;
116		206
117	INLINE void	207	ecb_inline void
118	need (enc_t *enc, STRLEN len)	208	need (enc_t *enc, STRLEN len)
119	{	209	{
120	if (expect_false (enc->cur + len >= enc->end))	210	if (ecb_expect_false (enc->cur + len >= enc->end))
121	{	211	{
122	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	212	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
123	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	213	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
124	enc->cur = SvPVX (enc->sv) + cur;	214	enc->cur = SvPVX (enc->sv) + cur;
125	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	215	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
126	}	216	}
127	}	217	}
128		218
129	INLINE void	219	ecb_inline void
130	encode_ch (enc_t *enc, char ch)	220	encode_ch (enc_t *enc, char ch)
131	{	221	{
132	need (enc, 1);	222	need (enc, 1);
133	*enc->cur++ = ch;	223	*enc->cur++ = ch;
134	}	224	}
…		…
136	static void	226	static void
137	encode_uint (enc_t *enc, int major, UV len)	227	encode_uint (enc_t *enc, int major, UV len)
138	{	228	{
139	need (enc, 9);	229	need (enc, 9);
140		230
141	if (len < 24)	231	if (ecb_expect_true (len < LENGTH_EXT1))
142	*enc->cur++ = major | len;	232	*enc->cur++ = major | len;
143	else if (len < 0x100)	233	else if (ecb_expect_true (len <= 0xff))
144	{	234	{
145	*enc->cur++ = major | 24;	235	*enc->cur++ = major | LENGTH_EXT1;
146	*enc->cur++ = len;	236	*enc->cur++ = len;
147	}	237	}
148	else if (len < 0x10000)	238	else if (len <= 0xffff)
149	{	239	{
150	*enc->cur++ = major | 25;	240	*enc->cur++ = major | LENGTH_EXT2;
151	*enc->cur++ = len >> 8;	241	*enc->cur++ = len >> 8;
152	*enc->cur++ = len;	242	*enc->cur++ = len;
153	}	243	}
154	else if (len < 0x100000000)	244	else if (len <= 0xffffffff)
155	{	245	{
156	*enc->cur++ = major | 26;	246	*enc->cur++ = major | LENGTH_EXT4;
157	*enc->cur++ = len >> 24;	247	*enc->cur++ = len >> 24;
158	*enc->cur++ = len >> 16;	248	*enc->cur++ = len >> 16;
159	*enc->cur++ = len >> 8;	249	*enc->cur++ = len >> 8;
160	*enc->cur++ = len;	250	*enc->cur++ = len;
161	}	251	}
162	else if (len)	252	else
163	{	253	{
164	*enc->cur++ = major | 27;	254	*enc->cur++ = major | LENGTH_EXT8;
165	*enc->cur++ = len >> 56;	255	*enc->cur++ = len >> 56;
166	*enc->cur++ = len >> 48;	256	*enc->cur++ = len >> 48;
167	*enc->cur++ = len >> 40;	257	*enc->cur++ = len >> 40;
168	*enc->cur++ = len >> 32;	258	*enc->cur++ = len >> 32;
169	*enc->cur++ = len >> 24;	259	*enc->cur++ = len >> 24;
…		…
171	*enc->cur++ = len >> 8;	261	*enc->cur++ = len >> 8;
172	*enc->cur++ = len;	262	*enc->cur++ = len;
173	}	263	}
174	}	264	}
175		265
176	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
177	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	273	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)
178	{	274	{
179	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	275	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
180	need (enc, len);	276	need (enc, len);
181	memcpy (enc->cur, str, len);	277	memcpy (enc->cur, str, len);
182	enc->cur += len;	278	enc->cur += len;
183	}	279	}
184		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
185	static void encode_sv (enc_t *enc, SV *sv);	306	static void encode_sv (enc_t *enc, SV *sv);
186		307
187	static void	308	static void
188	encode_av (enc_t *enc, AV *av)	309	encode_av (enc_t *enc, AV *av)
189	{	310	{
…		…
192	if (enc->depth >= enc->cbor.max_depth)	313	if (enc->depth >= enc->cbor.max_depth)
193	croak (ERR_NESTING_EXCEEDED);	314	croak (ERR_NESTING_EXCEEDED);
194		315
195	++enc->depth;	316	++enc->depth;
196		317
197	encode_uint (enc, 0x80, len + 1);	318	encode_uint (enc, MAJOR_ARRAY, len + 1);
198		319
199	for (i = 0; i <= len; ++i)	320	for (i = 0; i <= len; ++i)
200	{	321	{
201	SV **svp = av_fetch (av, i, 0);	322	SV **svp = av_fetch (av, i, 0);
202	encode_sv (enc, svp ? *svp : &PL_sv_undef);	323	encode_sv (enc, svp ? *svp : &PL_sv_undef);
…		…
217		338
218	int pairs = hv_iterinit (hv);	339	int pairs = hv_iterinit (hv);
219	int mg = SvMAGICAL (hv);	340	int mg = SvMAGICAL (hv);
220		341
221	if (mg)	342	if (mg)
222	encode_ch (enc, 0xa0 | 31);	343	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
223	else	344	else
224	encode_uint (enc, 0xa0, pairs);	345	encode_uint (enc, MAJOR_MAP, pairs);
225		346
226	while ((he = hv_iternext (hv)))	347	while ((he = hv_iternext (hv)))
227	{	348	{
228	if (HeKLEN (he) == HEf_SVKEY)	349	if (HeKLEN (he) == HEf_SVKEY)
229	encode_sv (enc, HeSVKEY (he));	350	encode_sv (enc, HeSVKEY (he));
230	else	351	else
231	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	352	encode_strref (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));
232		353
233	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));
234	}	355	}
235		356
236	if (mg)	357	if (mg)
237	encode_ch (enc, 0xe0 | 31);	358	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
238		359
239	--enc->depth;	360	--enc->depth;
240	}	361	}
241		362
242	// encode objects, arrays and special \0=false and \1=true values.	363	// encode objects, arrays and special \0=false and \1=true values.
243	static void	364	static void
244	encode_rv (enc_t *enc, SV *sv)	365	encode_rv (enc_t *enc, SV *sv)
245	{	366	{
246	svtype svt;
247
248	SvGETMAGIC (sv);	367	SvGETMAGIC (sv);
		368
249	svt = SvTYPE (sv);	369	svtype svt = SvTYPE (sv);
250		370
251	if (expect_false (SvOBJECT (sv)))	371	if (ecb_expect_false (SvOBJECT (sv)))
252	{	372	{
253	HV *stash = !CBOR_SLOW || cbor_boolean_stash	373	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
254	? 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
255	: gv_stashpv ("CBOR::XS::Boolean", 1);	381	: gv_stashpv ("CBOR::XS::Tagged" , 1);
256		382
257	if (SvSTASH (sv) == stash)	383	HV *stash = SvSTASH (sv);
258	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	}
259	else	421	else
260	{	422	{
261	#if 0 //TODO	423	sv_setuv (*svp, enc->shareable_idx);
262	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)))
263	{	435	{
		436	dSP;
		437
		438	ENTER; SAVETMPS; PUSHMARK (SP);
264	// 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
265	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
266
267	if (to_cbor)
268	{
269	dSP;
270
271	ENTER; SAVETMPS; PUSHMARK (SP);
272	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	440	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
273		441
274	// calling with G_SCALAR ensures that we always get a 1 return value
275	PUTBACK;	442	PUTBACK;
		443	// G_SCALAR ensures that return value is 1
276	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	444	call_sv ((SV *)GvCV (method), G_SCALAR);
277	SPAGAIN;	445	SPAGAIN;
278		446
279	// catch this surprisingly common error	447	// catch this surprisingly common error
280	if (SvROK (TOPs) && SvRV (TOPs) == sv)	448	if (SvROK (TOPs) && SvRV (TOPs) == sv)
281	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	449	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
282		450
283	sv = POPs;
284	PUTBACK;
285
286	encode_sv (enc, sv);	451	encode_sv (enc, POPs);
287		452
		453	PUTBACK;
		454
288	FREETMPS; LEAVE;	455	FREETMPS; LEAVE;
289	}
290	else if (enc->cbor.flags & F_ALLOW_BLESSED)
291	encode_str (enc, "null", 4, 0);
292	else
293	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it",
294	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
295	}	456	}
296	else if (enc->cbor.flags & F_ALLOW_BLESSED)	457	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
297	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	}
298	else	486	else
299	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",
300	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	488	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
301	#endif
302	}
303	}	489	}
304	else if (svt == SVt_PVHV)	490	else if (svt == SVt_PVHV)
305	encode_hv (enc, (HV *)sv);	491	encode_hv (enc, (HV *)sv);
306	else if (svt == SVt_PVAV)	492	else if (svt == SVt_PVAV)
307	encode_av (enc, (AV *)sv);	493	encode_av (enc, (AV *)sv);
308	else if (svt < SVt_PVAV)
309	{
310	STRLEN len = 0;
311	char *pv = svt ? SvPV (sv, len) : 0;
312
313	if (len == 1 && *pv == '1')
314	encode_ch (enc, 0xe0 | 21);
315	else if (len == 1 && *pv == '0')
316	encode_ch (enc, 0xe0 | 20);
317	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
318	encode_ch (enc, 0xe0 | 23);
319	else
320	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
321	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
322	}
323	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
324	encode_ch (enc, 0xe0 | 23);
325	else	494	else
326	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	495	{
327	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	496	encode_tag (enc, CBOR_TAG_INDIRECTION);
		497	encode_sv (enc, sv);
		498	}
328	}	499	}
329		500
330	static void	501	static void
331	encode_nv (enc_t *enc, SV *sv)	502	encode_nv (enc_t *enc, SV *sv)
332	{	503	{
333	double nv = SvNVX (sv);	504	double nv = SvNVX (sv);
334		505
335	need (enc, 9);	506	need (enc, 9);
336		507
337	if (expect_false (nv == (U32)nv))	508	if (ecb_expect_false (nv == (NV)(U32)nv))
338	encode_uint (enc, 0x00, (U32)nv);	509	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
339	//TODO: maybe I32?	510	//TODO: maybe I32?
340	else if (expect_false (nv == (float)nv))	511	else if (ecb_expect_false (nv == (float)nv))
341	{	512	{
342	uint32_t fp = ecb_float_to_binary32 (nv);	513	uint32_t fp = ecb_float_to_binary32 (nv);
343		514
344	*enc->cur++ = 0xe0 | 26;	515	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
345		516
346	if (!ecb_big_endian ())	517	if (!ecb_big_endian ())
347	fp = ecb_bswap32 (fp);	518	fp = ecb_bswap32 (fp);
348		519
349	memcpy (enc->cur, &fp, 4);	520	memcpy (enc->cur, &fp, 4);
…		…
351	}	522	}
352	else	523	else
353	{	524	{
354	uint64_t fp = ecb_double_to_binary64 (nv);	525	uint64_t fp = ecb_double_to_binary64 (nv);
355		526
356	*enc->cur++ = 0xe0 | 27;	527	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
357		528
358	if (!ecb_big_endian ())	529	if (!ecb_big_endian ())
359	fp = ecb_bswap64 (fp);	530	fp = ecb_bswap64 (fp);
360		531
361	memcpy (enc->cur, &fp, 8);	532	memcpy (enc->cur, &fp, 8);
…		…
370		541
371	if (SvPOKp (sv))	542	if (SvPOKp (sv))
372	{	543	{
373	STRLEN len;	544	STRLEN len;
374	char *str = SvPV (sv, len);	545	char *str = SvPV (sv, len);
375	encode_str (enc, SvUTF8 (sv), str, len);	546	encode_strref (enc, SvUTF8 (sv), str, len);
376	}	547	}
377	else if (SvNOKp (sv))	548	else if (SvNOKp (sv))
378	encode_nv (enc, sv);	549	encode_nv (enc, sv);
379	else if (SvIOKp (sv))	550	else if (SvIOKp (sv))
380	{	551	{
381	if (SvIsUV (sv))	552	if (SvIsUV (sv))
382	encode_uint (enc, 0x00, SvUVX (sv));	553	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
383	else if (SvIVX (sv) >= 0)	554	else if (SvIVX (sv) >= 0)
384	encode_uint (enc, 0x00, SvIVX (sv));	555	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
385	else	556	else
386	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	557	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
387	}	558	}
388	else if (SvROK (sv))	559	else if (SvROK (sv))
389	encode_rv (enc, SvRV (sv));	560	encode_rv (enc, SvRV (sv));
390	else if (!SvOK (sv))	561	else if (!SvOK (sv))
391	encode_ch (enc, 0xe0 | 22);	562	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
392	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	563	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
393	encode_ch (enc, 0xe0 | 23);	564	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
394	else	565	else
395	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",
396	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	567	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
397	}	568	}
398		569
399	static SV *	570	static SV *
400	encode_cbor (SV *scalar, CBOR *cbor)	571	encode_cbor (SV *scalar, CBOR *cbor)
401	{	572	{
402	enc_t enc;	573	enc_t enc = { };
403		574
404	enc.cbor = *cbor;	575	enc.cbor = *cbor;
405	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	576	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
406	enc.cur = SvPVX (enc.sv);	577	enc.cur = SvPVX (enc.sv);
407	enc.end = SvEND (enc.sv);	578	enc.end = SvEND (enc.sv);
408	enc.depth = 0;
409		579
410	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
411	encode_sv (&enc, scalar);	589	encode_sv (&enc, scalar);
412		590
413	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	591	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
414	*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
415		593
…		…
429	U8 *end; // end of input string	607	U8 *end; // end of input string
430	const char *err; // parse error, if != 0	608	const char *err; // parse error, if != 0
431	CBOR cbor;	609	CBOR cbor;
432	U32 depth; // recursion depth	610	U32 depth; // recursion depth
433	U32 maxdepth; // recursion depth limit	611	U32 maxdepth; // recursion depth limit
		612	AV *shareable;
		613	AV *stringref;
		614	SV *decode_tagged;
434	} dec_t;	615	} dec_t;
435		616
436	#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
437		618
438	#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")
439		620
440	#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)
441	#define DEC_DEC_DEPTH --dec->depth	622	#define DEC_DEC_DEPTH --dec->depth
442		623
443	static UV	624	static UV
444	decode_uint (dec_t *dec)	625	decode_uint (dec_t *dec)
445	{	626	{
446	switch (*dec->cur & 31)	627	U8 m = *dec->cur & MINOR_MASK;
		628	++dec->cur;
		629
		630	if (ecb_expect_true (m < LENGTH_EXT1))
		631	return m;
		632
		633	switch (m)
447	{	634	{
448	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:	635	case LENGTH_EXT1:
449	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:	636	WANT (1);
450	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:	637	dec->cur += 1;
451	return *dec->cur++ & 31;	638	return dec->cur[-1];
452		639
453	case 24:	640	case LENGTH_EXT2:
454	WANT (2);	641	WANT (2);
455	dec->cur += 2;	642	dec->cur += 2;
456	return dec->cur[-1];
457
458	case 25:
459	WANT (3);
460	dec->cur += 3;
461	return (((UV)dec->cur[-2]) << 8)	643	return (((UV)dec->cur[-2]) << 8)
462	| ((UV)dec->cur[-1]);	644	| ((UV)dec->cur[-1]);
463		645
464	case 26:	646	case LENGTH_EXT4:
465	WANT (5);	647	WANT (4);
466	dec->cur += 5;	648	dec->cur += 4;
467	return (((UV)dec->cur[-4]) << 24)	649	return (((UV)dec->cur[-4]) << 24)
468	| (((UV)dec->cur[-3]) << 16)	650	| (((UV)dec->cur[-3]) << 16)
469	| (((UV)dec->cur[-2]) << 8)	651	| (((UV)dec->cur[-2]) << 8)
470	| ((UV)dec->cur[-1]);	652	| ((UV)dec->cur[-1]);
471		653
472	case 27:	654	case LENGTH_EXT8:
473	WANT (9);	655	WANT (8);
474	dec->cur += 9;	656	dec->cur += 8;
		657
		658	return
		659	#if UVSIZE < 8
		660	0
		661	#else
475	return (((UV)dec->cur[-8]) << 56)	662	(((UV)dec->cur[-8]) << 56)
476	| (((UV)dec->cur[-7]) << 48)	663	| (((UV)dec->cur[-7]) << 48)
477	| (((UV)dec->cur[-6]) << 40)	664	| (((UV)dec->cur[-6]) << 40)
478	| (((UV)dec->cur[-5]) << 32)	665	| (((UV)dec->cur[-5]) << 32)
		666	#endif
479	| (((UV)dec->cur[-4]) << 24)	667	| (((UV)dec->cur[-4]) << 24)
480	| (((UV)dec->cur[-3]) << 16)	668	| (((UV)dec->cur[-3]) << 16)
481	| (((UV)dec->cur[-2]) << 8)	669	| (((UV)dec->cur[-2]) << 8)
482	| ((UV)dec->cur[-1]);	670	| ((UV)dec->cur[-1]);
483		671
…		…
496	{	684	{
497	AV *av = newAV ();	685	AV *av = newAV ();
498		686
499	DEC_INC_DEPTH;	687	DEC_INC_DEPTH;
500		688
501	if ((*dec->cur & 31) == 31)	689	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
502	{	690	{
503	++dec->cur;	691	++dec->cur;
504		692
505	for (;;)	693	for (;;)
506	{	694	{
507	WANT (1);	695	WANT (1);
508		696
509	if (*dec->cur == 0xe0 | 31)	697	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
510	{	698	{
511	++dec->cur;	699	++dec->cur;
512	break;	700	break;
513	}	701	}
514		702
…		…
532	SvREFCNT_dec (av);	720	SvREFCNT_dec (av);
533	DEC_DEC_DEPTH;	721	DEC_DEC_DEPTH;
534	return &PL_sv_undef;	722	return &PL_sv_undef;
535	}	723	}
536		724
		725	static void
		726	decode_he (dec_t *dec, HV *hv)
		727	{
		728	// for speed reasons, we specialcase single-string
		729	// byte or utf-8 strings as keys, but only when !stringref
		730
		731	if (ecb_expect_true (!dec->stringref))
		732	if ((*dec->cur - MAJOR_BYTES) <= 27)
		733	{
		734	I32 len = decode_uint (dec);
		735	char *key = (char *)dec->cur;
		736
		737	dec->cur += len;
		738
		739	if (ecb_expect_false (dec->stringref))
		740	av_push (dec->stringref, newSVpvn (key, len));
		741
		742	hv_store (hv, key, len, decode_sv (dec), 0);
		743
		744	return;
		745	}
		746	else if ((*dec->cur - MAJOR_TEXT) <= 27)
		747	{
		748	I32 len = decode_uint (dec);
		749	char *key = (char *)dec->cur;
		750
		751	dec->cur += len;
		752
		753	if (ecb_expect_false (dec->stringref))
		754	av_push (dec->stringref, newSVpvn_utf8 (key, len, 1));
		755
		756	hv_store (hv, key, -len, decode_sv (dec), 0);
		757
		758	return;
		759	}
		760
		761	SV *k = decode_sv (dec);
		762	SV *v = decode_sv (dec);
		763
		764	hv_store_ent (hv, k, v, 0);
		765	SvREFCNT_dec (k);
		766	}
		767
537	static SV *	768	static SV *
538	decode_hv (dec_t *dec)	769	decode_hv (dec_t *dec)
539	{	770	{
540	HV *hv = newHV ();	771	HV *hv = newHV ();
541		772
542	DEC_INC_DEPTH;	773	DEC_INC_DEPTH;
543		774
544	if ((*dec->cur & 31) == 31)	775	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
545	{	776	{
546	++dec->cur;	777	++dec->cur;
547		778
548	for (;;)	779	for (;;)
549	{	780	{
550	WANT (1);	781	WANT (1);
551		782
552	if (*dec->cur == 0xe0 | 31)	783	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
553	{	784	{
554	++dec->cur;	785	++dec->cur;
555	break;	786	break;
556	}	787	}
557		788
558	SV *k = decode_sv (dec);	789	decode_he (dec, hv);
559	SV *v = decode_sv (dec);
560
561	hv_store_ent (hv, k, v, 0);
562	}	790	}
563	}	791	}
564	else	792	else
565	{	793	{
566	int len = decode_uint (dec);	794	int pairs = decode_uint (dec);
567		795
568	while (len--)	796	while (pairs--)
569	{	797	decode_he (dec, hv);
570	SV *k = decode_sv (dec);
571	SV *v = decode_sv (dec);
572
573	hv_store_ent (hv, k, v, 0);
574	}
575	}	798	}
576		799
577	DEC_DEC_DEPTH;	800	DEC_DEC_DEPTH;
578	return newRV_noinc ((SV *)hv);	801	return newRV_noinc ((SV *)hv);
579
580	#if 0
581	SV *sv;
582	HV *hv = newHV ();
583
584	DEC_INC_DEPTH;
585	decode_ws (dec);
586
587	for (;;)
588	{
589	// heuristic: assume that
590	// a) decode_str + hv_store_ent are abysmally slow.
591	// b) most hash keys are short, simple ascii text.
592	// => try to "fast-match" such strings to avoid
593	// the overhead of decode_str + hv_store_ent.
594	{
595	SV *value;
596	char *p = dec->cur;
597	char *e = p + 24; // only try up to 24 bytes
598
599	for (;;)
600	{
601	// the >= 0x80 is false on most architectures
602	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
603	{
604	// slow path, back up and use decode_str
605	SV *key = decode_str (dec);
606	if (!key)
607	goto fail;
608
609	decode_ws (dec); EXPECT_CH (':');
610
611	decode_ws (dec);
612	value = decode_sv (dec);
613	if (!value)
614	{
615	SvREFCNT_dec (key);
616	goto fail;
617	}
618
619	hv_store_ent (hv, key, value, 0);
620	SvREFCNT_dec (key);
621
622	break;
623	}
624	else if (*p == '"')
625	{
626	// fast path, got a simple key
627	char *key = dec->cur;
628	int len = p - key;
629	dec->cur = p + 1;
630
631	decode_ws (dec); EXPECT_CH (':');
632
633	decode_ws (dec);
634	value = decode_sv (dec);
635	if (!value)
636	goto fail;
637
638	hv_store (hv, key, len, value, 0);
639
640	break;
641	}
642
643	++p;
644	}
645	}
646
647	decode_ws (dec);
648
649	if (*dec->cur == '}')
650	{
651	++dec->cur;
652	break;
653	}
654
655	if (*dec->cur != ',')
656	ERR (", or } expected while parsing object/hash");
657
658	++dec->cur;
659
660	decode_ws (dec);
661
662	if (*dec->cur == '}' && dec->cbor.flags & F_RELAXED)
663	{
664	++dec->cur;
665	break;
666	}
667	}
668
669	DEC_DEC_DEPTH;
670	sv = newRV_noinc ((SV *)hv);
671
672	// check filter callbacks
673	if (dec->cbor.flags & F_HOOK)
674	{
675	if (dec->cbor.cb_sk_object && HvKEYS (hv) == 1)
676	{
677	HE *cb, *he;
678
679	hv_iterinit (hv);
680	he = hv_iternext (hv);
681	hv_iterinit (hv);
682
683	// the next line creates a mortal sv each time its called.
684	// might want to optimise this for common cases.
685	cb = hv_fetch_ent (dec->cbor.cb_sk_object, hv_iterkeysv (he), 0, 0);
686
687	if (cb)
688	{
689	dSP;
690	int count;
691
692	ENTER; SAVETMPS; PUSHMARK (SP);
693	XPUSHs (HeVAL (he));
694	sv_2mortal (sv);
695
696	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
697
698	if (count == 1)
699	{
700	sv = newSVsv (POPs);
701	FREETMPS; LEAVE;
702	return sv;
703	}
704
705	SvREFCNT_inc (sv);
706	FREETMPS; LEAVE;
707	}
708	}
709
710	if (dec->cbor.cb_object)
711	{
712	dSP;
713	int count;
714
715	ENTER; SAVETMPS; PUSHMARK (SP);
716	XPUSHs (sv_2mortal (sv));
717
718	PUTBACK; count = call_sv (dec->cbor.cb_object, G_ARRAY); SPAGAIN;
719
720	if (count == 1)
721	{
722	sv = newSVsv (POPs);
723	FREETMPS; LEAVE;
724	return sv;
725	}
726
727	SvREFCNT_inc (sv);
728	FREETMPS; LEAVE;
729	}
730	}
731
732	return sv;
733	#endif
734		802
735	fail:	803	fail:
736	SvREFCNT_dec (hv);	804	SvREFCNT_dec (hv);
737	DEC_DEC_DEPTH;	805	DEC_DEC_DEPTH;
738	return &PL_sv_undef;	806	return &PL_sv_undef;
739	}	807	}
740		808
741	static SV *	809	static SV *
742	decode_str (dec_t *dec, int utf8)	810	decode_str (dec_t *dec, int utf8)
743	{	811	{
744	SV *sv;	812	SV *sv = 0;
745		813
746	if ((*dec->cur & 31) == 31)	814	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
747	{	815	{
		816	// indefinite length strings
748	++dec->cur;	817	++dec->cur;
749		818
		819	U8 major = *dec->cur & MAJOR_MISC;
		820
750	sv = newSVpvn ("", 0);	821	sv = newSVpvn ("", 0);
751		822
752	// not very fast, and certainly not robust against illegal input
753	for (;;)	823	for (;;)
754	{	824	{
755	WANT (1);	825	WANT (1);
756		826
757	if (*dec->cur == 0xe0 | 31)	827	if ((*dec->cur - major) > LENGTH_EXT8)
		828	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
758	{	829	{
759	++dec->cur;	830	++dec->cur;
760	break;	831	break;
761	}	832	}
		833	else
		834	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
762		835
763	SV *sv2 = decode_sv (dec);	836	STRLEN len = decode_uint (dec);
764	sv_catsv (sv, sv2);	837
		838	WANT (len);
		839	sv_catpvn (sv, dec->cur, len);
		840	dec->cur += len;
765	}	841	}
766	}	842	}
767	else	843	else
768	{	844	{
769	STRLEN len = decode_uint (dec);	845	STRLEN len = decode_uint (dec);
770		846
771	WANT (len);	847	WANT (len);
772	sv = newSVpvn (dec->cur, len);	848	sv = newSVpvn (dec->cur, len);
773	dec->cur += len;	849	dec->cur += len;
		850
		851	if (ecb_expect_false (dec->stringref)
		852	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		853	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
774	}	854	}
775		855
776	if (utf8)	856	if (utf8)
777	SvUTF8_on (sv);	857	SvUTF8_on (sv);
778		858
779	return sv;	859	return sv;
780		860
781	fail:	861	fail:
		862	SvREFCNT_dec (sv);
		863	return &PL_sv_undef;
		864	}
		865
		866	static SV *
		867	decode_tagged (dec_t *dec)
		868	{
		869	SV *sv = 0;
		870	UV tag = decode_uint (dec);
		871
		872	WANT (1);
		873
		874	switch (tag)
		875	{
		876	case CBOR_TAG_MAGIC:
		877	sv = decode_sv (dec);
		878	break;
		879
		880	case CBOR_TAG_INDIRECTION:
		881	sv = newRV_noinc (decode_sv (dec));
		882	break;
		883
		884	case CBOR_TAG_STRINGREF_NAMESPACE:
		885	{
		886	ENTER; SAVETMPS;
		887
		888	SAVESPTR (dec->stringref);
		889	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		890
		891	sv = decode_sv (dec);
		892
		893	FREETMPS; LEAVE;
		894	}
		895	break;
		896
		897	case CBOR_TAG_STRINGREF:
		898	{
		899	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		900	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		901
		902	UV idx = decode_uint (dec);
		903
		904	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		905	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		906
		907	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		908	}
		909	break;
		910
		911	case CBOR_TAG_VALUE_SHAREABLE:
		912	{
		913	if (ecb_expect_false (!dec->shareable))
		914	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		915
		916	sv = newSV (0);
		917	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		918
		919	SV *osv = decode_sv (dec);
		920	sv_setsv (sv, osv);
		921	SvREFCNT_dec_NN (osv);
		922	}
		923	break;
		924
		925	case CBOR_TAG_VALUE_SHAREDREF:
		926	{
		927	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		928	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		929
		930	UV idx = decode_uint (dec);
		931
		932	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		933	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		934
		935	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		936	}
		937	break;
		938
		939	case CBOR_TAG_PERL_OBJECT:
		940	{
		941	sv = decode_sv (dec);
		942
		943	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		944	ERR ("corrupted CBOR data (non-array perl object)");
		945
		946	AV *av = (AV *)SvRV (sv);
		947	int len = av_len (av) + 1;
		948	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		949
		950	if (!stash)
		951	ERR ("cannot decode perl-object (package does not exist)");
		952
		953	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		954
		955	if (!method)
		956	ERR ("cannot decode perl-object (package does not have a THAW method)");
		957
		958	dSP;
		959
		960	ENTER; SAVETMPS; PUSHMARK (SP);
		961	EXTEND (SP, len + 1);
		962	// we re-bless the reference to get overload and other niceties right
		963	PUSHs (*av_fetch (av, 0, 1));
		964	PUSHs (sv_cbor);
		965
		966	int i;
		967
		968	for (i = 1; i < len; ++i)
		969	PUSHs (*av_fetch (av, i, 1));
		970
		971	PUTBACK;
		972	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		973	SPAGAIN;
		974
		975	if (SvTRUE (ERRSV))
		976	{
		977	FREETMPS; LEAVE;
		978	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		979	}
		980
		981	SvREFCNT_dec (sv);
		982	sv = SvREFCNT_inc (POPs);
		983
		984	PUTBACK;
		985
		986	FREETMPS; LEAVE;
		987	}
		988	break;
		989
		990	default:
		991	{
		992	sv = decode_sv (dec);
		993
		994	dSP;
		995	ENTER; SAVETMPS; PUSHMARK (SP);
		996	EXTEND (SP, 2);
		997	PUSHs (newSVuv (tag));
		998	PUSHs (sv);
		999
		1000	PUTBACK;
		1001	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1002	SPAGAIN;
		1003
		1004	if (SvTRUE (ERRSV))
		1005	{
		1006	FREETMPS; LEAVE;
		1007	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1008	}
		1009
		1010	if (count)
		1011	{
		1012	SvREFCNT_dec (sv);
		1013	sv = SvREFCNT_inc (POPs);
		1014	}
		1015	else
		1016	{
		1017	AV *av = newAV ();
		1018	av_push (av, newSVuv (tag));
		1019	av_push (av, sv);
		1020
		1021	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1022	? cbor_tagged_stash
		1023	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1024	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1025	}
		1026
		1027	PUTBACK;
		1028
		1029	FREETMPS; LEAVE;
		1030	}
		1031	break;
		1032	}
		1033
		1034	return sv;
		1035
		1036	fail:
		1037	SvREFCNT_dec (sv);
782	return &PL_sv_undef;	1038	return &PL_sv_undef;
783	}	1039	}
784		1040
785	static SV *	1041	static SV *
786	decode_sv (dec_t *dec)	1042	decode_sv (dec_t *dec)
787	{	1043	{
788	WANT (1);	1044	WANT (1);
789		1045
790	switch (*dec->cur >> 5)	1046	switch (*dec->cur >> MAJOR_SHIFT)
791	{	1047	{
792	case 0: // unsigned int	1048	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
793	//TODO: 64 bit values on 3 2bit perls	1049	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
794	return newSVuv (decode_uint (dec));	1050	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
795	case 1: // negative int	1051	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
796	return newSViv (-1 - (IV)decode_uint (dec));	1052	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
797	case 2: // octet string	1053	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
798	return decode_str (dec, 0);	1054	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
799	case 3: // utf-8 string	1055
800	return decode_str (dec, 1);	1056	case MAJOR_MISC >> MAJOR_SHIFT:
801	case 4: // array
802	return decode_av (dec);
803	case 5: // map
804	return decode_hv (dec);
805	case 6: // tag
806	abort ();
807	break;
808	case 7: // misc
809	switch (*dec->cur++ & 31)	1057	switch (*dec->cur++ & MINOR_MASK)
810	{	1058	{
811	case 20:	1059	case SIMPLE_FALSE:
812	#if CBOR_SLOW	1060	#if CBOR_SLOW
813	cbor_false = get_bool ("CBOR::XS::false");	1061	types_false = get_bool ("Types::Serialiser::false");
814	#endif	1062	#endif
815	return newSVsv (cbor_false);	1063	return newSVsv (types_false);
816	case 21:	1064	case SIMPLE_TRUE:
817	#if CBOR_SLOW	1065	#if CBOR_SLOW
818	cbor_true = get_bool ("CBOR::XS::true");	1066	types_true = get_bool ("Types::Serialiser::true");
819	#endif	1067	#endif
820	return newSVsv (cbor_true);	1068	return newSVsv (types_true);
821	case 22:	1069	case SIMPLE_NULL:
822	return newSVsv (&PL_sv_undef);	1070	return newSVsv (&PL_sv_undef);
		1071	case SIMPLE_UNDEF:
		1072	#if CBOR_SLOW
		1073	types_error = get_bool ("Types::Serialiser::error");
		1074	#endif
		1075	return newSVsv (types_error);
823		1076
824	case 25:	1077	case MISC_FLOAT16:
825	// half float
826	abort ();
827	break;	1078	{
		1079	WANT (2);
828		1080
		1081	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
		1082	dec->cur += 2;
		1083
		1084	return newSVnv (ecb_binary16_to_float (fp));
		1085	}
		1086
829	case 26:	1087	case MISC_FLOAT32:
830	{	1088	{
831	uint32_t fp;	1089	uint32_t fp;
832	WANT (4);	1090	WANT (4);
833	memcpy (&fp, dec->cur, 4);	1091	memcpy (&fp, dec->cur, 4);
834	dec->cur += 4;	1092	dec->cur += 4;
…		…
837	fp = ecb_bswap32 (fp);	1095	fp = ecb_bswap32 (fp);
838		1096
839	return newSVnv (ecb_binary32_to_float (fp));	1097	return newSVnv (ecb_binary32_to_float (fp));
840	}	1098	}
841		1099
842	case 27:	1100	case MISC_FLOAT64:
843	{	1101	{
844	uint64_t fp;	1102	uint64_t fp;
845	WANT (8);	1103	WANT (8);
846	memcpy (&fp, dec->cur, 8);	1104	memcpy (&fp, dec->cur, 8);
847	dec->cur += 8;	1105	dec->cur += 8;
…		…
850	fp = ecb_bswap64 (fp);	1108	fp = ecb_bswap64 (fp);
851		1109
852	return newSVnv (ecb_binary64_to_double (fp));	1110	return newSVnv (ecb_binary64_to_double (fp));
853	}	1111	}
854		1112
855	// 0..19 unassigned	1113	// 0..19 unassigned simple
856	// 24 reserved + unassigned (reserved values are not encodable)	1114	// 24 reserved + unassigned (reserved values are not encodable)
857	default:	1115	default:
858	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1116	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");
859	}	1117	}
860		1118
861	break;	1119	break;
862	}	1120	}
863	#if 0
864	switch (*dec->cur)
865	{
866	//case '"': ++dec->cur; return decode_str (dec);
867	case '[': ++dec->cur; return decode_av (dec);
868	case '{': ++dec->cur; return decode_hv (dec);
869
870	case '-':
871	case '0': case '1': case '2': case '3': case '4':
872	case '5': case '6': case '7': case '8': case '9':
873	//TODO return decode_num (dec);
874
875	case 't':
876	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
877	{
878	dec->cur += 4;
879	#if CBOR_SLOW
880	cbor_true = get_bool ("CBOR::XS::true");
881	#endif
882	return newSVsv (cbor_true);
883	}
884	else
885	ERR ("'true' expected");
886
887	break;
888
889	case 'f':
890	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
891	{
892	dec->cur += 5;
893	#if CBOR_SLOW
894	cbor_false = get_bool ("CBOR::XS::false");
895	#endif
896	return newSVsv (cbor_false);
897	}
898	else
899	ERR ("'false' expected");
900
901	break;
902
903	case 'n':
904	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
905	{
906	dec->cur += 4;
907	return newSVsv (&PL_sv_undef);
908	}
909	else
910	ERR ("'null' expected");
911
912	break;
913
914	default:
915	ERR ("malformed CBOR string, neither array, object, number, string or atom");
916	break;
917	}
918	#endif
919		1121
920	fail:	1122	fail:
921	return &PL_sv_undef;	1123	return &PL_sv_undef;
922	}	1124	}
923		1125
924	static SV *	1126	static SV *
925	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1127	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
926	{	1128	{
927	dec_t dec;	1129	dec_t dec = { };
928	SV *sv;	1130	SV *sv;
		1131	STRLEN len;
		1132	char *data = SvPVbyte (string, len);
929		1133
930	/* work around bugs in 5.10 where manipulating magic values
931	* makes perl ignore the magic in subsequent accesses.
932	* also make a copy of non-PV values, to get them into a clean
933	* state (SvPV should do that, but it's buggy, see below).
934	*/
935	/*SvGETMAGIC (string);*/
936	if (SvMAGICAL (string) || !SvPOK (string))
937	string = sv_2mortal (newSVsv (string));
938
939	SvUPGRADE (string, SVt_PV);
940
941	/* work around a bug in perl 5.10, which causes SvCUR to fail an
942	* assertion with -DDEBUGGING, although SvCUR is documented to
943	* return the xpv_cur field which certainly exists after upgrading.
944	* according to nicholas clark, calling SvPOK fixes this.
945	* But it doesn't fix it, so try another workaround, call SvPV_nolen
946	* and hope for the best.
947	* Damnit, SvPV_nolen still trips over yet another assertion. This
948	* assertion business is seriously broken, try yet another workaround
949	* for the broken -DDEBUGGING.
950	*/
951	{
952	#ifdef DEBUGGING
953	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
954	#else
955	STRLEN offset = SvCUR (string);
956	#endif
957
958	if (offset > cbor->max_size && cbor->max_size)	1134	if (len > cbor->max_size && cbor->max_size)
959	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1135	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
960	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1136	(unsigned long)len, (unsigned long)cbor->max_size);
961	}
962
963	sv_utf8_downgrade (string, 0);
964		1137
965	dec.cbor = *cbor;	1138	dec.cbor = *cbor;
966	dec.cur = (U8 *)SvPVX (string);	1139	dec.cur = (U8 *)data;
967	dec.end = (U8 *)SvEND (string);	1140	dec.end = (U8 *)data + len;
968	dec.err = 0;
969	dec.depth = 0;
970
971	if (dec.cbor.cb_object || dec.cbor.cb_sk_object)
972	;//TODO dec.cbor.flags |= F_HOOK;
973		1141
974	sv = decode_sv (&dec);	1142	sv = decode_sv (&dec);
975		1143
976	if (offset_return)	1144	if (offset_return)
977	*offset_return = dec.cur;	1145	*offset_return = dec.cur;
978		1146
979	if (!(offset_return || !sv))	1147	if (!(offset_return || !sv))
980	{
981	if (*dec.cur && !dec.err)	1148	if (dec.cur != dec.end && !dec.err)
982	{
983	dec.err = "garbage after CBOR object";	1149	dec.err = "garbage after CBOR object";
		1150
		1151	if (dec.err)
		1152	{
984	SvREFCNT_dec (sv);	1153	SvREFCNT_dec (sv);
985	sv = 0;
986	}
987	}
988
989	if (!sv)
990	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1154	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
		1155	}
991		1156
992	sv = sv_2mortal (sv);	1157	sv = sv_2mortal (sv);
993		1158
994	return sv;	1159	return sv;
995	}	1160	}
…		…
1000	MODULE = CBOR::XS PACKAGE = CBOR::XS	1165	MODULE = CBOR::XS PACKAGE = CBOR::XS
1001		1166
1002	BOOT:	1167	BOOT:
1003	{	1168	{
1004	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1169	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1005	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1170	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1006		1171
1007	cbor_true = get_bool ("CBOR::XS::true");	1172	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1008	cbor_false = get_bool ("CBOR::XS::false");	1173	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1174
		1175	types_true = get_bool ("Types::Serialiser::true" );
		1176	types_false = get_bool ("Types::Serialiser::false");
		1177	types_error = get_bool ("Types::Serialiser::error");
		1178
		1179	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1180
		1181	sv_cbor = newSVpv ("CBOR", 0);
		1182	SvREADONLY_on (sv_cbor);
1009	}	1183	}
1010		1184
1011	PROTOTYPES: DISABLE	1185	PROTOTYPES: DISABLE
1012		1186
1013	void CLONE (...)	1187	void CLONE (...)
1014	CODE:	1188	CODE:
1015	cbor_stash = 0;	1189	cbor_stash = 0;
		1190	cbor_tagged_stash = 0;
		1191	types_error_stash = 0;
1016	cbor_boolean_stash = 0;	1192	types_boolean_stash = 0;
1017		1193
1018	void new (char *klass)	1194	void new (char *klass)
1019	PPCODE:	1195	PPCODE:
1020	{	1196	{
1021	SV *pv = NEWSV (0, sizeof (CBOR));	1197	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1029		1205
1030	void shrink (CBOR *self, int enable = 1)	1206	void shrink (CBOR *self, int enable = 1)
1031	ALIAS:	1207	ALIAS:
1032	shrink = F_SHRINK	1208	shrink = F_SHRINK
1033	allow_unknown = F_ALLOW_UNKNOWN	1209	allow_unknown = F_ALLOW_UNKNOWN
		1210	allow_sharing = F_ALLOW_SHARING
		1211	pack_strings = F_PACK_STRINGS
1034	PPCODE:	1212	PPCODE:
1035	{	1213	{
1036	if (enable)	1214	if (enable)
1037	self->flags |= ix;	1215	self->flags |= ix;
1038	else	1216	else
…		…
1043		1221
1044	void get_shrink (CBOR *self)	1222	void get_shrink (CBOR *self)
1045	ALIAS:	1223	ALIAS:
1046	get_shrink = F_SHRINK	1224	get_shrink = F_SHRINK
1047	get_allow_unknown = F_ALLOW_UNKNOWN	1225	get_allow_unknown = F_ALLOW_UNKNOWN
		1226	get_allow_sharing = F_ALLOW_SHARING
		1227	get_pack_strings = F_PACK_STRINGS
1048	PPCODE:	1228	PPCODE:
1049	XPUSHs (boolSV (self->flags & ix));	1229	XPUSHs (boolSV (self->flags & ix));
1050		1230
1051	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1231	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1052	PPCODE:	1232	PPCODE:
…		…
1068	CODE:	1248	CODE:
1069	RETVAL = self->max_size;	1249	RETVAL = self->max_size;
1070	OUTPUT:	1250	OUTPUT:
1071	RETVAL	1251	RETVAL
1072		1252
1073	#if 0 //TODO	1253	void filter (CBOR *self, SV *filter = 0)
1074
1075	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1076	PPCODE:	1254	PPCODE:
1077	{
1078	SvREFCNT_dec (self->cb_object);	1255	SvREFCNT_dec (self->filter);
1079	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1256	self->filter = filter ? newSVsv (filter) : filter;
1080
1081	XPUSHs (ST (0));	1257	XPUSHs (ST (0));
1082	}
1083		1258
1084	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1259	SV *get_filter (CBOR *self)
1085	PPCODE:	1260	CODE:
1086	{	1261	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1087	if (!self->cb_sk_object)	1262	OUTPUT:
1088	self->cb_sk_object = newHV ();	1263	RETVAL
1089
1090	if (SvOK (cb))
1091	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1092	else
1093	{
1094	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1095
1096	if (!HvKEYS (self->cb_sk_object))
1097	{
1098	SvREFCNT_dec (self->cb_sk_object);
1099	self->cb_sk_object = 0;
1100	}
1101	}
1102
1103	XPUSHs (ST (0));
1104	}
1105
1106	#endif
1107		1264
1108	void encode (CBOR *self, SV *scalar)	1265	void encode (CBOR *self, SV *scalar)
1109	PPCODE:	1266	PPCODE:
1110	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1267	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1111	XPUSHs (scalar);	1268	XPUSHs (scalar);
…		…
1125	PUSHs (sv);	1282	PUSHs (sv);
1126	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1283	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1127	}	1284	}
1128		1285
1129	void DESTROY (CBOR *self)	1286	void DESTROY (CBOR *self)
1130	CODE:	1287	PPCODE:
1131	SvREFCNT_dec (self->cb_sk_object);	1288	cbor_free (self);
1132	SvREFCNT_dec (self->cb_object);
1133		1289
1134	PROTOTYPES: ENABLE	1290	PROTOTYPES: ENABLE
1135		1291
1136	void encode_cbor (SV *scalar)	1292	void encode_cbor (SV *scalar)
1137	PPCODE:	1293	PPCODE:

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