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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.17 by root, Tue Oct 29 22:04:52 2013 UTC vs.
Revision 1.52 by root, Sun Apr 24 19:31:55 2016 UTC

…		…
7	#include <stdlib.h>	7	#include <stdlib.h>
8	#include <stdio.h>	8	#include <stdio.h>
9	#include <limits.h>	9	#include <limits.h>
10	#include <float.h>	10	#include <float.h>
11		11
		12	#define ECB_NO_THREADS 1
12	#include "ecb.h"	13	#include "ecb.h"
13		14
14	// compatibility with perl <5.18	15	// compatibility with perl <5.18
15	#ifndef HvNAMELEN_get	16	#ifndef HvNAMELEN_get
16	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))	17	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
…		…
19	# define HvNAMELEN(hv) HvNAMELEN_get (hv)	20	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
20	#endif	21	#endif
21	#ifndef HvNAMEUTF8	22	#ifndef HvNAMEUTF8
22	# define HvNAMEUTF8(hv) 0	23	# define HvNAMEUTF8(hv) 0
23	#endif	24	#endif
		25	#ifndef SvREFCNT_dec_NN
		26	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		27	#endif
		28
		29	// known major and minor types
		30	enum cbor_type
		31	{
		32	MAJOR_SHIFT = 5,
		33	MINOR_MASK = 0x1f,
		34
		35	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		36	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		37	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		38	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		39	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		40	MAJOR_MAP = 5 << MAJOR_SHIFT,
		41	MAJOR_TAG = 6 << MAJOR_SHIFT,
		42	MAJOR_MISC = 7 << MAJOR_SHIFT,
		43
		44	// INT/STRING/ARRAY/MAP subtypes
		45	LENGTH_EXT1 = 24,
		46	LENGTH_EXT2 = 25,
		47	LENGTH_EXT4 = 26,
		48	LENGTH_EXT8 = 27,
		49
		50	// SIMPLE types (effectively MISC subtypes)
		51	SIMPLE_FALSE = 20,
		52	SIMPLE_TRUE = 21,
		53	SIMPLE_NULL = 22,
		54	SIMPLE_UNDEF = 23,
		55
		56	// MISC subtype (unused)
		57	MISC_EXT1 = 24,
		58	MISC_FLOAT16 = 25,
		59	MISC_FLOAT32 = 26,
		60	MISC_FLOAT64 = 27,
		61
		62	// BYTES/TEXT/ARRAY/MAP
		63	MINOR_INDEF = 31,
		64	};
24		65
25	// known tags	66	// known tags
26	enum cbor_tag	67	enum cbor_tag
27	{	68	{
28	// inofficial extensions (pending iana registration)	69	// extensions
29	CBOR_TAG_PERL_OBJECT = 256,	70	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
30	CBOR_TAG_GENERIC_OBJECT = 257,	71	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
		72	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
		73	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
		74	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
		75	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
		76	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
31		77
32	// rfc7049	78	// rfc7049
33	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	79	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
34	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	80	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
35	CBOR_TAG_POS_BIGNUM = 2, // byte string	81	CBOR_TAG_POS_BIGNUM = 2, // byte string
36	CBOR_TAG_NEG_BIGNUM = 3, // byte string	82	CBOR_TAG_NEG_BIGNUM = 3, // byte string
37	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	83	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
38	CBOR_TAG_BIGFLOAT = 5, // array	84	CBOR_TAG_BIGFLOAT = 5, // array
39		85
40	CBOR_TAG_CONV_B64U = 21, // base64url, any	86	CBOR_TAG_CONV_B64U = 21, // base64url, any
41	CBOR_TAG_CONV_B64 = 22, // base64, any	87	CBOR_TAG_CONV_B64 = 22, // base64, any
42	CBOR_TAG_CONV_HEX = 23, // base16, any	88	CBOR_TAG_CONV_HEX = 23, // base16, any
43	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	89	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
44		90
45	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	91	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
46	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	92	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
47	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	93	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
48	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	94	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
49	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	95	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
50		96
51	CBOR_TAG_MAGIC = 55799 // self-describe cbor	97	CBOR_TAG_MAGIC = 55799, // self-describe cbor
52	};	98	};
53		99
54	#define F_SHRINK 0x00000200UL	100	#define F_SHRINK 0x00000001UL
55	#define F_ALLOW_UNKNOWN 0x00002000UL	101	#define F_ALLOW_UNKNOWN 0x00000002UL
		102	#define F_ALLOW_SHARING 0x00000004UL
		103	#define F_ALLOW_CYCLES 0x00000008UL
		104	#define F_PACK_STRINGS 0x00000010UL
		105	#define F_UTF8_STRINGS 0x00000020UL
		106	#define F_VALIDATE_UTF8 0x00000040UL
56		107
57	#define INIT_SIZE 32 // initial scalar size to be allocated	108	#define INIT_SIZE 32 // initial scalar size to be allocated
58		109
59	#define SB do {	110	#define SB do {
60	#define SE } while (0)	111	#define SE } while (0)
…		…
72	# define CBOR_SLOW 0	123	# define CBOR_SLOW 0
73	# define CBOR_STASH cbor_stash	124	# define CBOR_STASH cbor_stash
74	#endif	125	#endif
75		126
76	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::	127	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
77	static SV *types_true, *types_false, *types_error, *sv_cbor;	128	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
78		129
79	typedef struct {	130	typedef struct {
80	U32 flags;	131	U32 flags;
81	U32 max_depth;	132	U32 max_depth;
82	STRLEN max_size;	133	STRLEN max_size;
		134	SV *filter;
		135
		136	// for the incremental parser
		137	STRLEN incr_pos; // the current offset into the text
		138	STRLEN incr_need; // minimum bytes needed to decode
		139	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
83	} CBOR;	140	} CBOR;
84		141
85	ecb_inline void	142	ecb_inline void
86	cbor_init (CBOR *cbor)	143	cbor_init (CBOR *cbor)
87	{	144	{
88	Zero (cbor, 1, CBOR);	145	Zero (cbor, 1, CBOR);
89	cbor->max_depth = 512;	146	cbor->max_depth = 512;
		147	}
		148
		149	ecb_inline void
		150	cbor_free (CBOR *cbor)
		151	{
		152	SvREFCNT_dec (cbor->filter);
		153	SvREFCNT_dec (cbor->incr_count);
90	}	154	}
91		155
92	/////////////////////////////////////////////////////////////////////////////	156	/////////////////////////////////////////////////////////////////////////////
93	// utility functions	157	// utility functions
94		158
…		…
116	SvPV_renew (sv, SvCUR (sv) + 1);	180	SvPV_renew (sv, SvCUR (sv) + 1);
117	#endif	181	#endif
118	}	182	}
119	}	183	}
120		184
121	/////////////////////////////////////////////////////////////////////////////	185	// minimum length of a string to be registered for stringref
122	// fp hell	186	ecb_inline int
123		187	minimum_string_length (UV idx)
124	//TODO	188	{
		189	return idx > 23
		190	? idx > 0xffU
		191	? idx > 0xffffU
		192	? idx > 0xffffffffU
		193	? 11
		194	: 7
		195	: 5
		196	: 4
		197	: 3;
		198	}
125		199
126	/////////////////////////////////////////////////////////////////////////////	200	/////////////////////////////////////////////////////////////////////////////
127	// encoder	201	// encoder
128		202
129	// structure used for encoding CBOR	203	// structure used for encoding CBOR
…		…
132	char *cur; // SvPVX (sv) + current output position	206	char *cur; // SvPVX (sv) + current output position
133	char *end; // SvEND (sv)	207	char *end; // SvEND (sv)
134	SV *sv; // result scalar	208	SV *sv; // result scalar
135	CBOR cbor;	209	CBOR cbor;
136	U32 depth; // recursion level	210	U32 depth; // recursion level
		211	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		212	UV stringref_idx;
		213	HV *shareable; // ptr => index, or 0
		214	UV shareable_idx;
137	} enc_t;	215	} enc_t;
138		216
139	ecb_inline void	217	ecb_inline void
140	need (enc_t *enc, STRLEN len)	218	need (enc_t *enc, STRLEN len)
141	{	219	{
…		…
158	static void	236	static void
159	encode_uint (enc_t *enc, int major, UV len)	237	encode_uint (enc_t *enc, int major, UV len)
160	{	238	{
161	need (enc, 9);	239	need (enc, 9);
162		240
163	if (len < 24)	241	if (ecb_expect_true (len < LENGTH_EXT1))
164	*enc->cur++ = major | len;	242	*enc->cur++ = major | len;
165	else if (len <= 0xff)	243	else if (ecb_expect_true (len <= 0xffU))
166	{	244	{
167	*enc->cur++ = major | 24;	245	*enc->cur++ = major | LENGTH_EXT1;
168	*enc->cur++ = len;	246	*enc->cur++ = len;
169	}	247	}
170	else if (len <= 0xffff)	248	else if (len <= 0xffffU)
171	{	249	{
172	*enc->cur++ = major | 25;	250	*enc->cur++ = major | LENGTH_EXT2;
173	*enc->cur++ = len >> 8;	251	*enc->cur++ = len >> 8;
174	*enc->cur++ = len;	252	*enc->cur++ = len;
175	}	253	}
176	else if (len <= 0xffffffff)	254	else if (len <= 0xffffffffU)
177	{	255	{
178	*enc->cur++ = major | 26;	256	*enc->cur++ = major | LENGTH_EXT4;
179	*enc->cur++ = len >> 24;	257	*enc->cur++ = len >> 24;
180	*enc->cur++ = len >> 16;	258	*enc->cur++ = len >> 16;
181	*enc->cur++ = len >> 8;	259	*enc->cur++ = len >> 8;
182	*enc->cur++ = len;	260	*enc->cur++ = len;
183	}	261	}
184	else	262	else
185	{	263	{
186	*enc->cur++ = major | 27;	264	*enc->cur++ = major | LENGTH_EXT8;
187	*enc->cur++ = len >> 56;	265	*enc->cur++ = len >> 56;
188	*enc->cur++ = len >> 48;	266	*enc->cur++ = len >> 48;
189	*enc->cur++ = len >> 40;	267	*enc->cur++ = len >> 40;
190	*enc->cur++ = len >> 32;	268	*enc->cur++ = len >> 32;
191	*enc->cur++ = len >> 24;	269	*enc->cur++ = len >> 24;
…		…
193	*enc->cur++ = len >> 8;	271	*enc->cur++ = len >> 8;
194	*enc->cur++ = len;	272	*enc->cur++ = len;
195	}	273	}
196	}	274	}
197		275
198	static void	276	ecb_inline void
		277	encode_tag (enc_t *enc, UV tag)
		278	{
		279	encode_uint (enc, MAJOR_TAG, tag);
		280	}
		281
		282	ecb_inline void
199	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	283	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)
200	{	284	{
201	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	285	if (ecb_expect_false (enc->cbor.flags & F_UTF8_STRINGS))
		286	if (!utf8)
		287	{
		288	// exceptional path for bytze strings that need to be utf8-encoded
		289	STRLEN ulen = len;
		290	U8 *p, *pend = (U8 *)str + len;
		291
		292	for (p = (U8 *)str; p < pend; ++p)
		293	ulen += *p >> 7; // count set high bits
		294
		295	encode_uint (enc, MAJOR_TEXT, ulen);
		296
		297	need (enc, ulen);
		298	for (p = (U8 *)str; p < pend; ++p)
		299	if (*p < 0x80)
		300	*enc->cur++ = *p;
		301	else
		302	{
		303	*enc->cur++ = 0xc0 + (*p >> 6);
		304	*enc->cur++ = 0x80 + (*p & 63);
		305	}
		306
		307	return;
		308	}
		309
		310	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
202	need (enc, len);	311	need (enc, len);
203	memcpy (enc->cur, str, len);	312	memcpy (enc->cur, str, len);
204	enc->cur += len;	313	enc->cur += len;
205	}	314	}
206		315
		316	static void
		317	encode_strref (enc_t *enc, int utf8, char *str, STRLEN len)
		318	{
		319	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		320	{
		321	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		322
		323	if (SvOK (*svp))
		324	{
		325	// already registered, use stringref
		326	encode_tag (enc, CBOR_TAG_STRINGREF);
		327	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		328	return;
		329	}
		330	else if (len >= minimum_string_length (enc->stringref_idx))
		331	{
		332	// register only
		333	sv_setuv (*svp, enc->stringref_idx);
		334	++enc->stringref_idx;
		335	}
		336	}
		337
		338	encode_str (enc, utf8, str, len);
		339	}
		340
207	static void encode_sv (enc_t *enc, SV *sv);	341	static void encode_sv (enc_t *enc, SV *sv);
208		342
209	static void	343	static void
210	encode_av (enc_t *enc, AV *av)	344	encode_av (enc_t *enc, AV *av)
211	{	345	{
…		…
214	if (enc->depth >= enc->cbor.max_depth)	348	if (enc->depth >= enc->cbor.max_depth)
215	croak (ERR_NESTING_EXCEEDED);	349	croak (ERR_NESTING_EXCEEDED);
216		350
217	++enc->depth;	351	++enc->depth;
218		352
219	encode_uint (enc, 0x80, len + 1);	353	encode_uint (enc, MAJOR_ARRAY, len + 1);
220		354
		355	if (SvMAGICAL (av))
221	for (i = 0; i <= len; ++i)	356	for (i = 0; i <= len; ++i)
222	{	357	{
223	SV **svp = av_fetch (av, i, 0);	358	SV **svp = av_fetch (av, i, 0);
224	encode_sv (enc, svp ? *svp : &PL_sv_undef);	359	encode_sv (enc, svp ? *svp : &PL_sv_undef);
225	}	360	}
		361	else
		362	for (i = 0; i <= len; ++i)
		363	{
		364	SV *sv = AvARRAY (av)[i];
		365	encode_sv (enc, sv ? sv : &PL_sv_undef);
		366	}
226		367
227	--enc->depth;	368	--enc->depth;
228	}	369	}
229		370
230	static void	371	static void
…		…
239		380
240	int pairs = hv_iterinit (hv);	381	int pairs = hv_iterinit (hv);
241	int mg = SvMAGICAL (hv);	382	int mg = SvMAGICAL (hv);
242		383
243	if (mg)	384	if (mg)
244	encode_ch (enc, 0xa0 | 31);	385	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
245	else	386	else
246	encode_uint (enc, 0xa0, pairs);	387	encode_uint (enc, MAJOR_MAP, pairs);
247		388
248	while ((he = hv_iternext (hv)))	389	while ((he = hv_iternext (hv)))
249	{	390	{
250	if (HeKLEN (he) == HEf_SVKEY)	391	if (HeKLEN (he) == HEf_SVKEY)
251	encode_sv (enc, HeSVKEY (he));	392	encode_sv (enc, HeSVKEY (he));
252	else	393	else
253	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	394	encode_strref (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));
254		395
255	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	396	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
256	}	397	}
257		398
258	if (mg)	399	if (mg)
259	encode_ch (enc, 0xe0 | 31);	400	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
260		401
261	--enc->depth;	402	--enc->depth;
262	}	403	}
263		404
264	// encode objects, arrays and special \0=false and \1=true values.	405	// encode objects, arrays and special \0=false and \1=true values.
265	static void	406	static void
266	encode_rv (enc_t *enc, SV *sv)	407	encode_rv (enc_t *enc, SV *sv)
267	{	408	{
268	svtype svt;
269
270	SvGETMAGIC (sv);	409	SvGETMAGIC (sv);
		410
271	svt = SvTYPE (sv);	411	svtype svt = SvTYPE (sv);
272		412
273	if (ecb_expect_false (SvOBJECT (sv)))	413	if (ecb_expect_false (SvOBJECT (sv)))
274	{	414	{
275	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash	415	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
276	? types_boolean_stash	416	? types_boolean_stash
…		…
281	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	421	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
282	? cbor_tagged_stash	422	? cbor_tagged_stash
283	: gv_stashpv ("CBOR::XS::Tagged" , 1);	423	: gv_stashpv ("CBOR::XS::Tagged" , 1);
284		424
285	HV *stash = SvSTASH (sv);	425	HV *stash = SvSTASH (sv);
286	GV *method;
287		426
288	if (stash == boolean_stash)	427	if (stash == boolean_stash)
289	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	428	{
		429	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		430	return;
		431	}
290	else if (stash == error_stash)	432	else if (stash == error_stash)
291	encode_ch (enc, 0xe0 | 23);	433	{
		434	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		435	return;
		436	}
292	else if (stash == tagged_stash)	437	else if (stash == tagged_stash)
293	{	438	{
294	if (svt != SVt_PVAV)	439	if (svt != SVt_PVAV)
295	croak ("encountered CBOR::XS::Tagged object that isn't an array");	440	croak ("encountered CBOR::XS::Tagged object that isn't an array");
296		441
297	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	442	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
298	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));	443	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		444
		445	return;
		446	}
		447	}
		448
		449	if (ecb_expect_false (SvREFCNT (sv) > 1)
		450	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		451	{
		452	if (!enc->shareable)
		453	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		454
		455	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		456
		457	if (SvOK (*svp))
299	}	458	{
		459	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		460	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		461	return;
		462	}
		463	else
		464	{
		465	sv_setuv (*svp, enc->shareable_idx);
		466	++enc->shareable_idx;
		467	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		468	}
		469	}
		470
		471	if (ecb_expect_false (SvOBJECT (sv)))
		472	{
		473	HV *stash = SvSTASH (sv);
		474	GV *method;
		475
300	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))	476	if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
301	{	477	{
302	dSP;	478	dSP;
303		479
304	ENTER; SAVETMPS; PUSHMARK (SP);	480	ENTER; SAVETMPS;
		481	PUSHMARK (SP);
305	// we re-bless the reference to get overload and other niceties right	482	// we re-bless the reference to get overload and other niceties right
306	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	483	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
307		484
308	PUTBACK;	485	PUTBACK;
309	// G_SCALAR ensures that return value is 1	486	// G_SCALAR ensures that return value is 1
…		…
322	}	499	}
323	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)	500	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
324	{	501	{
325	dSP;	502	dSP;
326		503
327	ENTER; SAVETMPS; PUSHMARK (SP);	504	ENTER; SAVETMPS;
		505	SAVESTACK_POS ();
		506	PUSHMARK (SP);
328	EXTEND (SP, 2);	507	EXTEND (SP, 2);
329	// we re-bless the reference to get overload and other niceties right	508	// we re-bless the reference to get overload and other niceties right
330	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	509	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
331	PUSHs (sv_cbor);	510	PUSHs (sv_cbor);
332		511
…		…
336		515
337	// catch this surprisingly common error	516	// catch this surprisingly common error
338	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)	517	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
339	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));	518	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
340		519
341	encode_uint (enc, 0xc0, CBOR_TAG_PERL_OBJECT);	520	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
342	encode_uint (enc, 0x80, count + 1);	521	encode_uint (enc, MAJOR_ARRAY, count + 1);
343	encode_str (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));	522	encode_strref (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
344		523
345	while (count)	524	while (count)
346	encode_sv (enc, SP[1 - count--]);	525	encode_sv (enc, SP[1 - count--]);
347		526
348	PUTBACK;	527	PUTBACK;
…		…
355	}	534	}
356	else if (svt == SVt_PVHV)	535	else if (svt == SVt_PVHV)
357	encode_hv (enc, (HV *)sv);	536	encode_hv (enc, (HV *)sv);
358	else if (svt == SVt_PVAV)	537	else if (svt == SVt_PVAV)
359	encode_av (enc, (AV *)sv);	538	encode_av (enc, (AV *)sv);
360	else if (svt < SVt_PVAV)
361	{
362	STRLEN len = 0;
363	char *pv = svt ? SvPV (sv, len) : 0;
364
365	if (len == 1 && *pv == '1')
366	encode_ch (enc, 0xe0 | 21);
367	else if (len == 1 && *pv == '0')
368	encode_ch (enc, 0xe0 | 20);
369	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
370	encode_ch (enc, 0xe0 | 23);
371	else
372	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
373	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
374	}
375	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
376	encode_ch (enc, 0xe0 | 23);
377	else	539	else
378	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	540	{
379	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	541	encode_tag (enc, CBOR_TAG_INDIRECTION);
		542	encode_sv (enc, sv);
		543	}
380	}	544	}
381		545
382	static void	546	static void
383	encode_nv (enc_t *enc, SV *sv)	547	encode_nv (enc_t *enc, SV *sv)
384	{	548	{
385	double nv = SvNVX (sv);	549	double nv = SvNVX (sv);
386		550
387	need (enc, 9);	551	need (enc, 9);
388		552
389	if (ecb_expect_false (nv == (U32)nv))	553	if (ecb_expect_false (nv == (NV)(U32)nv))
390	encode_uint (enc, 0x00, (U32)nv);	554	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
391	//TODO: maybe I32?	555	//TODO: maybe I32?
392	else if (ecb_expect_false (nv == (float)nv))	556	else if (ecb_expect_false (nv == (float)nv))
393	{	557	{
394	uint32_t fp = ecb_float_to_binary32 (nv);	558	uint32_t fp = ecb_float_to_binary32 (nv);
395		559
396	*enc->cur++ = 0xe0 | 26;	560	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
397		561
398	if (!ecb_big_endian ())	562	if (!ecb_big_endian ())
399	fp = ecb_bswap32 (fp);	563	fp = ecb_bswap32 (fp);
400		564
401	memcpy (enc->cur, &fp, 4);	565	memcpy (enc->cur, &fp, 4);
…		…
403	}	567	}
404	else	568	else
405	{	569	{
406	uint64_t fp = ecb_double_to_binary64 (nv);	570	uint64_t fp = ecb_double_to_binary64 (nv);
407		571
408	*enc->cur++ = 0xe0 | 27;	572	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
409		573
410	if (!ecb_big_endian ())	574	if (!ecb_big_endian ())
411	fp = ecb_bswap64 (fp);	575	fp = ecb_bswap64 (fp);
412		576
413	memcpy (enc->cur, &fp, 8);	577	memcpy (enc->cur, &fp, 8);
…		…
422		586
423	if (SvPOKp (sv))	587	if (SvPOKp (sv))
424	{	588	{
425	STRLEN len;	589	STRLEN len;
426	char *str = SvPV (sv, len);	590	char *str = SvPV (sv, len);
427	encode_str (enc, SvUTF8 (sv), str, len);	591	encode_strref (enc, SvUTF8 (sv), str, len);
428	}	592	}
429	else if (SvNOKp (sv))	593	else if (SvNOKp (sv))
430	encode_nv (enc, sv);	594	encode_nv (enc, sv);
431	else if (SvIOKp (sv))	595	else if (SvIOKp (sv))
432	{	596	{
433	if (SvIsUV (sv))	597	if (SvIsUV (sv))
434	encode_uint (enc, 0x00, SvUVX (sv));	598	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
435	else if (SvIVX (sv) >= 0)	599	else if (SvIVX (sv) >= 0)
436	encode_uint (enc, 0x00, SvIVX (sv));	600	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
437	else	601	else
438	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	602	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
439	}	603	}
440	else if (SvROK (sv))	604	else if (SvROK (sv))
441	encode_rv (enc, SvRV (sv));	605	encode_rv (enc, SvRV (sv));
442	else if (!SvOK (sv))	606	else if (!SvOK (sv))
443	encode_ch (enc, 0xe0 | 22);	607	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
444	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	608	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
445	encode_ch (enc, 0xe0 | 23);	609	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
446	else	610	else
447	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	611	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
448	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	612	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
449	}	613	}
450		614
451	static SV *	615	static SV *
452	encode_cbor (SV *scalar, CBOR *cbor)	616	encode_cbor (SV *scalar, CBOR *cbor)
453	{	617	{
454	enc_t enc;	618	enc_t enc = { 0 };
455		619
456	enc.cbor = *cbor;	620	enc.cbor = *cbor;
457	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	621	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
458	enc.cur = SvPVX (enc.sv);	622	enc.cur = SvPVX (enc.sv);
459	enc.end = SvEND (enc.sv);	623	enc.end = SvEND (enc.sv);
460	enc.depth = 0;
461		624
462	SvPOK_only (enc.sv);	625	SvPOK_only (enc.sv);
		626
		627	if (cbor->flags & F_PACK_STRINGS)
		628	{
		629	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		630	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		631	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		632	}
		633
463	encode_sv (&enc, scalar);	634	encode_sv (&enc, scalar);
464		635
465	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	636	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
466	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	637	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
467		638
…		…
481	U8 *end; // end of input string	652	U8 *end; // end of input string
482	const char *err; // parse error, if != 0	653	const char *err; // parse error, if != 0
483	CBOR cbor;	654	CBOR cbor;
484	U32 depth; // recursion depth	655	U32 depth; // recursion depth
485	U32 maxdepth; // recursion depth limit	656	U32 maxdepth; // recursion depth limit
		657	AV *shareable;
		658	AV *stringref;
		659	SV *decode_tagged;
486	} dec_t;	660	} dec_t;
487		661
488	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	662	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE
489		663
490	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	664	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")
…		…
493	#define DEC_DEC_DEPTH --dec->depth	667	#define DEC_DEC_DEPTH --dec->depth
494		668
495	static UV	669	static UV
496	decode_uint (dec_t *dec)	670	decode_uint (dec_t *dec)
497	{	671	{
498	switch (*dec->cur & 31)	672	U8 m = *dec->cur & MINOR_MASK;
499	{	673	++dec->cur;
500	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
501	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
502	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
503	return *dec->cur++ & 31;
504		674
505	case 24:	675	if (ecb_expect_true (m < LENGTH_EXT1))
		676	return m;
		677	else if (ecb_expect_true (m == LENGTH_EXT1))
		678	{
506	WANT (2);	679	WANT (1);
507	dec->cur += 2;	680	dec->cur += 1;
508	return dec->cur[-1];	681	return dec->cur[-1];
509		682	}
510	case 25:	683	else if (ecb_expect_true (m == LENGTH_EXT2))
		684	{
511	WANT (3);	685	WANT (2);
512	dec->cur += 3;	686	dec->cur += 2;
513	return (((UV)dec->cur[-2]) << 8)	687	return (((UV)dec->cur[-2]) << 8)
514	| ((UV)dec->cur[-1]);	688	| ((UV)dec->cur[-1]);
515		689	}
516	case 26:	690	else if (ecb_expect_true (m == LENGTH_EXT4))
		691	{
517	WANT (5);	692	WANT (4);
518	dec->cur += 5;	693	dec->cur += 4;
519	return (((UV)dec->cur[-4]) << 24)	694	return (((UV)dec->cur[-4]) << 24)
520	| (((UV)dec->cur[-3]) << 16)	695	| (((UV)dec->cur[-3]) << 16)
521	| (((UV)dec->cur[-2]) << 8)	696	| (((UV)dec->cur[-2]) << 8)
522	| ((UV)dec->cur[-1]);	697	| ((UV)dec->cur[-1]);
523		698	}
524	case 27:	699	else if (ecb_expect_true (m == LENGTH_EXT8))
		700	{
525	WANT (9);	701	WANT (8);
526	dec->cur += 9;	702	dec->cur += 8;
		703
		704	return
		705	#if UVSIZE < 8
		706	0
		707	#else
527	return (((UV)dec->cur[-8]) << 56)	708	(((UV)dec->cur[-8]) << 56)
528	| (((UV)dec->cur[-7]) << 48)	709	| (((UV)dec->cur[-7]) << 48)
529	| (((UV)dec->cur[-6]) << 40)	710	| (((UV)dec->cur[-6]) << 40)
530	| (((UV)dec->cur[-5]) << 32)	711	| (((UV)dec->cur[-5]) << 32)
		712	#endif
531	| (((UV)dec->cur[-4]) << 24)	713	| (((UV)dec->cur[-4]) << 24)
532	| (((UV)dec->cur[-3]) << 16)	714	| (((UV)dec->cur[-3]) << 16)
533	| (((UV)dec->cur[-2]) << 8)	715	| (((UV)dec->cur[-2]) << 8)
534	| ((UV)dec->cur[-1]);	716	| ((UV)dec->cur[-1]);
535		717	}
536	default:	718	else
537	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	719	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
538	}
539		720
540	fail:	721	fail:
541	return 0;	722	return 0;
542	}	723	}
543		724
…		…
548	{	729	{
549	AV *av = newAV ();	730	AV *av = newAV ();
550		731
551	DEC_INC_DEPTH;	732	DEC_INC_DEPTH;
552		733
553	if ((*dec->cur & 31) == 31)	734	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
554	{	735	{
555	++dec->cur;	736	++dec->cur;
556		737
557	for (;;)	738	for (;;)
558	{	739	{
559	WANT (1);	740	WANT (1);
560		741
561	if (*dec->cur == (0xe0 | 31))	742	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
562	{	743	{
563	++dec->cur;	744	++dec->cur;
564	break;	745	break;
565	}	746	}
566		747
…		…
569	}	750	}
570	else	751	else
571	{	752	{
572	int i, len = decode_uint (dec);	753	int i, len = decode_uint (dec);
573		754
		755	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
574	av_fill (av, len - 1);	756	av_fill (av, len - 1);
575		757
576	for (i = 0; i < len; ++i)	758	for (i = 0; i < len; ++i)
577	AvARRAY (av)[i] = decode_sv (dec);	759	AvARRAY (av)[i] = decode_sv (dec);
578	}	760	}
…		…
588		770
589	static void	771	static void
590	decode_he (dec_t *dec, HV *hv)	772	decode_he (dec_t *dec, HV *hv)
591	{	773	{
592	// for speed reasons, we specialcase single-string	774	// for speed reasons, we specialcase single-string
593	// byte or utf-8 strings as keys.	775	// byte or utf-8 strings as keys, but only when !stringref
594		776
595	if (*dec->cur >= 0x40 && *dec->cur <= 0x40 + 27)	777	if (ecb_expect_true (!dec->stringref))
		778	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
596	{	779	{
597	I32 len = decode_uint (dec);	780	I32 len = decode_uint (dec);
598	char *key = (char *)dec->cur;	781	char *key = (char *)dec->cur;
599		782
		783	WANT (len);
600	dec->cur += len;	784	dec->cur += len;
601		785
602	hv_store (hv, key, len, decode_sv (dec), 0);	786	hv_store (hv, key, len, decode_sv (dec), 0);
		787
		788	return;
603	}	789	}
604	else if (*dec->cur >= 0x60 && *dec->cur <= 0x60 + 27)	790	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
605	{	791	{
606	I32 len = decode_uint (dec);	792	I32 len = decode_uint (dec);
607	char *key = (char *)dec->cur;	793	char *key = (char *)dec->cur;
608		794
		795	WANT (len);
609	dec->cur += len;	796	dec->cur += len;
610		797
		798	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		799	if (!is_utf8_string (key, len))
		800	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		801
611	hv_store (hv, key, -len, decode_sv (dec), 0);	802	hv_store (hv, key, -len, decode_sv (dec), 0);
		803
		804	return;
612	}	805	}
613	else	806
614	{
615	SV *k = decode_sv (dec);	807	SV *k = decode_sv (dec);
616	SV *v = decode_sv (dec);	808	SV *v = decode_sv (dec);
617		809
618	hv_store_ent (hv, k, v, 0);	810	hv_store_ent (hv, k, v, 0);
619	SvREFCNT_dec (k);	811	SvREFCNT_dec (k);
620	}	812
		813	fail:
		814	;
621	}	815	}
622		816
623	static SV *	817	static SV *
624	decode_hv (dec_t *dec)	818	decode_hv (dec_t *dec)
625	{	819	{
626	HV *hv = newHV ();	820	HV *hv = newHV ();
627		821
628	DEC_INC_DEPTH;	822	DEC_INC_DEPTH;
629		823
630	if ((*dec->cur & 31) == 31)	824	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
631	{	825	{
632	++dec->cur;	826	++dec->cur;
633		827
634	for (;;)	828	for (;;)
635	{	829	{
636	WANT (1);	830	WANT (1);
637		831
638	if (*dec->cur == (0xe0 | 31))	832	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
639	{	833	{
640	++dec->cur;	834	++dec->cur;
641	break;	835	break;
642	}	836	}
643		837
…		…
664	static SV *	858	static SV *
665	decode_str (dec_t *dec, int utf8)	859	decode_str (dec_t *dec, int utf8)
666	{	860	{
667	SV *sv = 0;	861	SV *sv = 0;
668		862
669	if ((*dec->cur & 31) == 31)	863	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
670	{	864	{
		865	// indefinite length strings
671	++dec->cur;	866	++dec->cur;
672		867
		868	U8 major = *dec->cur & MAJOR_MISC;
		869
673	sv = newSVpvn ("", 0);	870	sv = newSVpvn ("", 0);
674		871
675	// not very fast, and certainly not robust against illegal input
676	for (;;)	872	for (;;)
677	{	873	{
678	WANT (1);	874	WANT (1);
679		875
680	if (*dec->cur == (0xe0 | 31))	876	if ((*dec->cur - major) > LENGTH_EXT8)
		877	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
681	{	878	{
682	++dec->cur;	879	++dec->cur;
683	break;	880	break;
684	}	881	}
		882	else
		883	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
685		884
686	sv_catsv (sv, decode_sv (dec));	885	STRLEN len = decode_uint (dec);
		886
		887	WANT (len);
		888	sv_catpvn (sv, dec->cur, len);
		889	dec->cur += len;
687	}	890	}
688	}	891	}
689	else	892	else
690	{	893	{
691	STRLEN len = decode_uint (dec);	894	STRLEN len = decode_uint (dec);
692		895
693	WANT (len);	896	WANT (len);
694	sv = newSVpvn (dec->cur, len);	897	sv = newSVpvn (dec->cur, len);
695	dec->cur += len;	898	dec->cur += len;
		899
		900	if (ecb_expect_false (dec->stringref)
		901	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		902	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
696	}	903	}
697		904
698	if (utf8)	905	if (utf8)
		906	{
		907	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		908	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		909	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		910
699	SvUTF8_on (sv);	911	SvUTF8_on (sv);
		912	}
700		913
701	return sv;	914	return sv;
702		915
703	fail:	916	fail:
704	SvREFCNT_dec (sv);	917	SvREFCNT_dec (sv);
…		…
706	}	919	}
707		920
708	static SV *	921	static SV *
709	decode_tagged (dec_t *dec)	922	decode_tagged (dec_t *dec)
710	{	923	{
		924	SV *sv = 0;
711	UV tag = decode_uint (dec);	925	UV tag = decode_uint (dec);
		926
		927	WANT (1);
		928
		929	switch (tag)
		930	{
		931	case CBOR_TAG_MAGIC:
712	SV *sv = decode_sv (dec);	932	sv = decode_sv (dec);
		933	break;
713		934
714	if (tag == CBOR_TAG_MAGIC)	935	case CBOR_TAG_INDIRECTION:
715	return sv;	936	sv = newRV_noinc (decode_sv (dec));
716	else if (tag == CBOR_TAG_PERL_OBJECT)	937	break;
717	{
718	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
719	ERR ("corrupted CBOR data (non-array perl object)");
720		938
721	AV *av = (AV *)SvRV (sv);	939	case CBOR_TAG_STRINGREF_NAMESPACE:
722	int len = av_len (av) + 1;
723	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
724
725	if (!stash)
726	ERR ("cannot decode perl-object (package does not exist)");
727
728	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
729		940	{
730	if (!method)	941	ENTER; SAVETMPS;
731	ERR ("cannot decode perl-object (package does not have a THAW method)");
732
733	dSP;
734		942
735	ENTER; SAVETMPS; PUSHMARK (SP);	943	SAVESPTR (dec->stringref);
736	EXTEND (SP, len + 1);	944	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
737	// we re-bless the reference to get overload and other niceties right
738	PUSHs (*av_fetch (av, 0, 1));
739	PUSHs (sv_cbor);
740		945
741	int i;	946	sv = decode_sv (dec);
742		947
743	for (i = 1; i < len; ++i)
744	PUSHs (*av_fetch (av, i, 1));
745
746	PUTBACK;
747	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
748	SPAGAIN;
749
750	if (SvTRUE (ERRSV))
751	{
752	FREETMPS; LEAVE;	948	FREETMPS; LEAVE;
		949	}
		950	break;
		951
		952	case CBOR_TAG_STRINGREF:
		953	{
		954	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		955	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		956
		957	UV idx = decode_uint (dec);
		958
		959	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		960	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		961
		962	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		963	}
		964	break;
		965
		966	case CBOR_TAG_VALUE_SHAREABLE:
		967	{
		968	if (ecb_expect_false (!dec->shareable))
		969	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		970
		971	if (dec->cbor.flags & F_ALLOW_CYCLES)
		972	{
		973	sv = newSV (0);
		974	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		975
		976	SV *osv = decode_sv (dec);
		977	sv_setsv (sv, osv);
		978	SvREFCNT_dec_NN (osv);
		979	}
		980	else
		981	{
		982	av_push (dec->shareable, &PL_sv_undef);
		983	int idx = AvFILLp (dec->shareable);
		984	sv = decode_sv (dec);
		985	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		986	}
		987	}
		988	break;
		989
		990	case CBOR_TAG_VALUE_SHAREDREF:
		991	{
		992	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		993	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		994
		995	UV idx = decode_uint (dec);
		996
		997	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		998	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		999
		1000	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1001
		1002	if (sv == &PL_sv_undef)
		1003	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1004	}
		1005	break;
		1006
		1007	case CBOR_TAG_PERL_OBJECT:
		1008	{
		1009	sv = decode_sv (dec);
		1010
		1011	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1012	ERR ("corrupted CBOR data (non-array perl object)");
		1013
		1014	AV *av = (AV *)SvRV (sv);
		1015	int len = av_len (av) + 1;
		1016	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1017
		1018	if (!stash)
		1019	ERR ("cannot decode perl-object (package does not exist)");
		1020
		1021	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1022
		1023	if (!method)
		1024	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1025
		1026	dSP;
		1027
		1028	ENTER; SAVETMPS;
		1029	PUSHMARK (SP);
		1030	EXTEND (SP, len + 1);
		1031	// we re-bless the reference to get overload and other niceties right
		1032	PUSHs (*av_fetch (av, 0, 1));
		1033	PUSHs (sv_cbor);
		1034
		1035	int i;
		1036
		1037	for (i = 1; i < len; ++i)
		1038	PUSHs (*av_fetch (av, i, 1));
		1039
		1040	PUTBACK;
		1041	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1042	SPAGAIN;
		1043
		1044	if (SvTRUE (ERRSV))
		1045	{
		1046	FREETMPS; LEAVE;
753	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));	1047	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
754	}	1048	}
755		1049
756	SvREFCNT_dec (sv);	1050	SvREFCNT_dec (sv);
757	sv = SvREFCNT_inc (POPs);	1051	sv = SvREFCNT_inc (POPs);
758		1052
759	PUTBACK;	1053	PUTBACK;
760		1054
761	FREETMPS; LEAVE;	1055	FREETMPS; LEAVE;
		1056	}
		1057	break;
762		1058
763	return sv;	1059	default:
764	}	1060	{
765	else	1061	sv = decode_sv (dec);
766	{	1062
		1063	dSP;
		1064	ENTER; SAVETMPS;
		1065	SAVESTACK_POS ();
		1066	PUSHMARK (SP);
		1067	EXTEND (SP, 2);
		1068	PUSHs (newSVuv (tag));
		1069	PUSHs (sv);
		1070
		1071	PUTBACK;
		1072	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1073	SPAGAIN;
		1074
		1075	if (SvTRUE (ERRSV))
		1076	{
		1077	FREETMPS; LEAVE;
		1078	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1079	}
		1080
		1081	if (count)
		1082	{
		1083	SvREFCNT_dec (sv);
		1084	sv = SvREFCNT_inc (POPs);
		1085	}
		1086	else
		1087	{
767	AV *av = newAV ();	1088	AV *av = newAV ();
768	av_push (av, newSVuv (tag));	1089	av_push (av, newSVuv (tag));
769	av_push (av, sv);	1090	av_push (av, sv);
770		1091
771	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	1092	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
772	? cbor_tagged_stash	1093	? cbor_tagged_stash
773	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1094	: gv_stashpv ("CBOR::XS::Tagged" , 1);
774
775	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);	1095	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1096	}
		1097
		1098	PUTBACK;
		1099
		1100	FREETMPS; LEAVE;
		1101	}
		1102	break;
776	}	1103	}
		1104
		1105	return sv;
777		1106
778	fail:	1107	fail:
779	SvREFCNT_dec (sv);	1108	SvREFCNT_dec (sv);
780	return &PL_sv_undef;	1109	return &PL_sv_undef;
781	}	1110	}
…		…
783	static SV *	1112	static SV *
784	decode_sv (dec_t *dec)	1113	decode_sv (dec_t *dec)
785	{	1114	{
786	WANT (1);	1115	WANT (1);
787		1116
788	switch (*dec->cur >> 5)	1117	switch (*dec->cur >> MAJOR_SHIFT)
789	{	1118	{
790	case 0: // unsigned int	1119	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
791	return newSVuv (decode_uint (dec));	1120	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
792	case 1: // negative int	1121	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
793	return newSViv (-1 - (IV)decode_uint (dec));	1122	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
794	case 2: // octet string	1123	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
795	return decode_str (dec, 0);	1124	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
796	case 3: // utf-8 string	1125	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
797	return decode_str (dec, 1);	1126
798	case 4: // array	1127	case MAJOR_MISC >> MAJOR_SHIFT:
799	return decode_av (dec);
800	case 5: // map
801	return decode_hv (dec);
802	case 6: // tag
803	return decode_tagged (dec);
804	case 7: // misc
805	switch (*dec->cur++ & 31)	1128	switch (*dec->cur++ & MINOR_MASK)
806	{	1129	{
807	case 20:	1130	case SIMPLE_FALSE:
808	#if CBOR_SLOW	1131	#if CBOR_SLOW
809	types_false = get_bool ("Types::Serialiser::false");	1132	types_false = get_bool ("Types::Serialiser::false");
810	#endif	1133	#endif
811	return newSVsv (types_false);	1134	return newSVsv (types_false);
812	case 21:	1135	case SIMPLE_TRUE:
813	#if CBOR_SLOW	1136	#if CBOR_SLOW
814	types_true = get_bool ("Types::Serialiser::true");	1137	types_true = get_bool ("Types::Serialiser::true");
815	#endif	1138	#endif
816	return newSVsv (types_true);	1139	return newSVsv (types_true);
817	case 22:	1140	case SIMPLE_NULL:
818	return newSVsv (&PL_sv_undef);	1141	return newSVsv (&PL_sv_undef);
819	case 23:	1142	case SIMPLE_UNDEF:
820	#if CBOR_SLOW	1143	#if CBOR_SLOW
821	types_error = get_bool ("Types::Serialiser::error");	1144	types_error = get_bool ("Types::Serialiser::error");
822	#endif	1145	#endif
823	return newSVsv (types_error);	1146	return newSVsv (types_error);
824		1147
825	case 25:	1148	case MISC_FLOAT16:
826	{	1149	{
827	WANT (2);	1150	WANT (2);
828		1151
829	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1152	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
830	dec->cur += 2;	1153	dec->cur += 2;
831		1154
832	return newSVnv (ecb_binary16_to_float (fp));	1155	return newSVnv (ecb_binary16_to_float (fp));
833	}	1156	}
834		1157
835	case 26:	1158	case MISC_FLOAT32:
836	{	1159	{
837	uint32_t fp;	1160	uint32_t fp;
838	WANT (4);	1161	WANT (4);
839	memcpy (&fp, dec->cur, 4);	1162	memcpy (&fp, dec->cur, 4);
840	dec->cur += 4;	1163	dec->cur += 4;
…		…
843	fp = ecb_bswap32 (fp);	1166	fp = ecb_bswap32 (fp);
844		1167
845	return newSVnv (ecb_binary32_to_float (fp));	1168	return newSVnv (ecb_binary32_to_float (fp));
846	}	1169	}
847		1170
848	case 27:	1171	case MISC_FLOAT64:
849	{	1172	{
850	uint64_t fp;	1173	uint64_t fp;
851	WANT (8);	1174	WANT (8);
852	memcpy (&fp, dec->cur, 8);	1175	memcpy (&fp, dec->cur, 8);
853	dec->cur += 8;	1176	dec->cur += 8;
…		…
856	fp = ecb_bswap64 (fp);	1179	fp = ecb_bswap64 (fp);
857		1180
858	return newSVnv (ecb_binary64_to_double (fp));	1181	return newSVnv (ecb_binary64_to_double (fp));
859	}	1182	}
860		1183
861	// 0..19 unassigned	1184	// 0..19 unassigned simple
862	// 24 reserved + unassigned (reserved values are not encodable)	1185	// 24 reserved + unassigned simple (reserved values are not encodable)
		1186	// 28-30 unassigned misc
		1187	// 31 break code
863	default:	1188	default:
864	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1189	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
865	}	1190	}
866		1191
867	break;	1192	break;
868	}	1193	}
869		1194
…		…
872	}	1197	}
873		1198
874	static SV *	1199	static SV *
875	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1200	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
876	{	1201	{
877	dec_t dec;	1202	dec_t dec = { 0 };
878	SV *sv;	1203	SV *sv;
879	STRLEN len;	1204	STRLEN len;
880	char *data = SvPVbyte (string, len);	1205	char *data = SvPVbyte (string, len);
881		1206
882	if (len > cbor->max_size && cbor->max_size)	1207	if (len > cbor->max_size && cbor->max_size)
…		…
884	(unsigned long)len, (unsigned long)cbor->max_size);	1209	(unsigned long)len, (unsigned long)cbor->max_size);
885		1210
886	dec.cbor = *cbor;	1211	dec.cbor = *cbor;
887	dec.cur = (U8 *)data;	1212	dec.cur = (U8 *)data;
888	dec.end = (U8 *)data + len;	1213	dec.end = (U8 *)data + len;
889	dec.err = 0;
890	dec.depth = 0;
891		1214
892	sv = decode_sv (&dec);	1215	sv = decode_sv (&dec);
893		1216
894	if (offset_return)	1217	if (offset_return)
895	*offset_return = dec.cur;	1218	*offset_return = dec.cur;
…		…
898	if (dec.cur != dec.end && !dec.err)	1221	if (dec.cur != dec.end && !dec.err)
899	dec.err = "garbage after CBOR object";	1222	dec.err = "garbage after CBOR object";
900		1223
901	if (dec.err)	1224	if (dec.err)
902	{	1225	{
		1226	if (dec.shareable)
		1227	{
		1228	// need to break cyclic links, which whould all be in shareable
		1229	int i;
		1230	SV **svp;
		1231
		1232	for (i = av_len (dec.shareable) + 1; i--; )
		1233	if ((svp = av_fetch (dec.shareable, i, 0)))
		1234	sv_setsv (*svp, &PL_sv_undef);
		1235	}
		1236
903	SvREFCNT_dec (sv);	1237	SvREFCNT_dec (sv);
904	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);	1238	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
905	}	1239	}
906		1240
907	sv = sv_2mortal (sv);	1241	sv = sv_2mortal (sv);
908		1242
909	return sv;	1243	return sv;
910	}	1244	}
911		1245
		1246	/////////////////////////////////////////////////////////////////////////////
		1247	// incremental parser
		1248
		1249	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1250
		1251	// returns 0 for notyet, 1 for success or error
		1252	static int
		1253	incr_parse (CBOR *self, SV *cborstr)
		1254	{
		1255	STRLEN cur;
		1256	SvPV (cborstr, cur);
		1257
		1258	while (ecb_expect_true (self->incr_need <= cur))
		1259	{
		1260	// table of integer count bytes
		1261	static I8 incr_len[MINOR_MASK + 1] = {
		1262	0, 0, 0, 0, 0, 0, 0, 0,
		1263	0, 0, 0, 0, 0, 0, 0, 0,
		1264	0, 0, 0, 0, 0, 0, 0, 0,
		1265	1, 2, 4, 8,-1,-1,-1,-2
		1266	};
		1267
		1268	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1269	U8 m = *p & MINOR_MASK;
		1270	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1271	I8 ilen = incr_len[m];
		1272
		1273	self->incr_need = self->incr_pos + 1;
		1274
		1275	if (ecb_expect_false (ilen < 0))
		1276	{
		1277	if (m != MINOR_INDEF)
		1278	return 1; // error
		1279
		1280	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1281	{
		1282	if (count >= 0)
		1283	return 1; // error
		1284
		1285	count = 1;
		1286	}
		1287	else
		1288	{
		1289	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1290	count = -1;
		1291	}
		1292	}
		1293	else
		1294	{
		1295	self->incr_need += ilen;
		1296	if (ecb_expect_false (self->incr_need > cur))
		1297	return 0;
		1298
		1299	int major = *p >> MAJOR_SHIFT;
		1300
		1301	switch (major)
		1302	{
		1303	case MAJOR_TAG >> MAJOR_SHIFT:
		1304	++count; // tags merely prefix another value
		1305	break;
		1306
		1307	case MAJOR_BYTES >> MAJOR_SHIFT:
		1308	case MAJOR_TEXT >> MAJOR_SHIFT:
		1309	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1310	case MAJOR_MAP >> MAJOR_SHIFT:
		1311	{
		1312	UV len;
		1313
		1314	if (ecb_expect_false (ilen))
		1315	{
		1316	len = 0;
		1317
		1318	do {
		1319	len = (len << 8) | *++p;
		1320	} while (--ilen);
		1321	}
		1322	else
		1323	len = m;
		1324
		1325	switch (major)
		1326	{
		1327	case MAJOR_BYTES >> MAJOR_SHIFT:
		1328	case MAJOR_TEXT >> MAJOR_SHIFT:
		1329	self->incr_need += len;
		1330	if (ecb_expect_false (self->incr_need > cur))
		1331	return 0;
		1332
		1333	break;
		1334
		1335	case MAJOR_MAP >> MAJOR_SHIFT:
		1336	len <<= 1;
		1337	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1338	if (len)
		1339	{
		1340	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1341	count = len + 1;
		1342	}
		1343	break;
		1344	}
		1345	}
		1346	}
		1347	}
		1348
		1349	self->incr_pos = self->incr_need;
		1350
		1351	if (count > 0)
		1352	{
		1353	while (!--count)
		1354	{
		1355	if (!AvFILLp (self->incr_count))
		1356	return 1; // done
		1357
		1358	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1359	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1360	}
		1361
		1362	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1363	}
		1364	}
		1365
		1366	return 0;
		1367	}
		1368
		1369
912	/////////////////////////////////////////////////////////////////////////////	1370	/////////////////////////////////////////////////////////////////////////////
913	// XS interface functions	1371	// XS interface functions
914		1372
915	MODULE = CBOR::XS PACKAGE = CBOR::XS	1373	MODULE = CBOR::XS PACKAGE = CBOR::XS
916		1374
…		…
923	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);	1381	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
924		1382
925	types_true = get_bool ("Types::Serialiser::true" );	1383	types_true = get_bool ("Types::Serialiser::true" );
926	types_false = get_bool ("Types::Serialiser::false");	1384	types_false = get_bool ("Types::Serialiser::false");
927	types_error = get_bool ("Types::Serialiser::error");	1385	types_error = get_bool ("Types::Serialiser::error");
		1386
		1387	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
928		1388
929	sv_cbor = newSVpv ("CBOR", 0);	1389	sv_cbor = newSVpv ("CBOR", 0);
930	SvREADONLY_on (sv_cbor);	1390	SvREADONLY_on (sv_cbor);
931	}	1391	}
932		1392
…		…
953		1413
954	void shrink (CBOR *self, int enable = 1)	1414	void shrink (CBOR *self, int enable = 1)
955	ALIAS:	1415	ALIAS:
956	shrink = F_SHRINK	1416	shrink = F_SHRINK
957	allow_unknown = F_ALLOW_UNKNOWN	1417	allow_unknown = F_ALLOW_UNKNOWN
		1418	allow_sharing = F_ALLOW_SHARING
		1419	allow_cycles = F_ALLOW_CYCLES
		1420	pack_strings = F_PACK_STRINGS
		1421	utf8_strings = F_UTF8_STRINGS
		1422	validate_utf8 = F_VALIDATE_UTF8
958	PPCODE:	1423	PPCODE:
959	{	1424	{
960	if (enable)	1425	if (enable)
961	self->flags |= ix;	1426	self->flags |= ix;
962	else	1427	else
…		…
967		1432
968	void get_shrink (CBOR *self)	1433	void get_shrink (CBOR *self)
969	ALIAS:	1434	ALIAS:
970	get_shrink = F_SHRINK	1435	get_shrink = F_SHRINK
971	get_allow_unknown = F_ALLOW_UNKNOWN	1436	get_allow_unknown = F_ALLOW_UNKNOWN
		1437	get_allow_sharing = F_ALLOW_SHARING
		1438	get_allow_cycles = F_ALLOW_CYCLES
		1439	get_pack_strings = F_PACK_STRINGS
		1440	get_validate_utf8 = F_VALIDATE_UTF8
972	PPCODE:	1441	PPCODE:
973	XPUSHs (boolSV (self->flags & ix));	1442	XPUSHs (boolSV (self->flags & ix));
974		1443
975	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1444	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
976	PPCODE:	1445	PPCODE:
…		…
989	XPUSHs (ST (0));	1458	XPUSHs (ST (0));
990		1459
991	int get_max_size (CBOR *self)	1460	int get_max_size (CBOR *self)
992	CODE:	1461	CODE:
993	RETVAL = self->max_size;	1462	RETVAL = self->max_size;
		1463	OUTPUT:
		1464	RETVAL
		1465
		1466	void filter (CBOR *self, SV *filter = 0)
		1467	PPCODE:
		1468	SvREFCNT_dec (self->filter);
		1469	self->filter = filter ? newSVsv (filter) : filter;
		1470	XPUSHs (ST (0));
		1471
		1472	SV *get_filter (CBOR *self)
		1473	CODE:
		1474	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
994	OUTPUT:	1475	OUTPUT:
995	RETVAL	1476	RETVAL
996		1477
997	void encode (CBOR *self, SV *scalar)	1478	void encode (CBOR *self, SV *scalar)
998	PPCODE:	1479	PPCODE:
…		…
1013	EXTEND (SP, 2);	1494	EXTEND (SP, 2);
1014	PUSHs (sv);	1495	PUSHs (sv);
1015	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1496	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1016	}	1497	}
1017		1498
		1499	void incr_parse (CBOR *self, SV *cborstr)
		1500	ALIAS:
		1501	incr_parse_multiple = 1
		1502	PPCODE:
		1503	{
		1504	if (SvUTF8 (cborstr))
		1505	sv_utf8_downgrade (cborstr, 0);
		1506
		1507	if (!self->incr_count)
		1508	{
		1509	self->incr_count = newAV ();
		1510	self->incr_pos = 0;
		1511	self->incr_need = 1;
		1512
		1513	av_push (self->incr_count, newSViv (1));
		1514	}
		1515
		1516	do
		1517	{
		1518	if (!incr_parse (self, cborstr))
		1519	{
		1520	if (self->incr_need > self->max_size && self->max_size)
		1521	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1522	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1523
		1524	break;
		1525	}
		1526
		1527	SV *sv;
		1528	char *offset;
		1529
		1530	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1531	XPUSHs (sv);
		1532
		1533	sv_chop (cborstr, offset);
		1534
		1535	av_clear (self->incr_count);
		1536	av_push (self->incr_count, newSViv (1));
		1537
		1538	self->incr_pos = 0;
		1539	self->incr_need = self->incr_pos + 1;
		1540	}
		1541	while (ix);
		1542	}
		1543
		1544	void incr_reset (CBOR *self)
		1545	CODE:
		1546	{
		1547	SvREFCNT_dec (self->incr_count);
		1548	self->incr_count = 0;
		1549	}
		1550
		1551	void DESTROY (CBOR *self)
		1552	PPCODE:
		1553	cbor_free (self);
		1554
1018	PROTOTYPES: ENABLE	1555	PROTOTYPES: ENABLE
1019		1556
1020	void encode_cbor (SV *scalar)	1557	void encode_cbor (SV *scalar)
		1558	ALIAS:
		1559	encode_cbor = 0
		1560	encode_cbor_sharing = F_ALLOW_SHARING
1021	PPCODE:	1561	PPCODE:
1022	{	1562	{
1023	CBOR cbor;	1563	CBOR cbor;
1024	cbor_init (&cbor);	1564	cbor_init (&cbor);
		1565	cbor.flags |= ix;
1025	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1566	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1026	XPUSHs (scalar);	1567	XPUSHs (scalar);
1027	}	1568	}
1028		1569
1029	void decode_cbor (SV *cborstr)	1570	void decode_cbor (SV *cborstr)

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