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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.12 by root, Mon Oct 28 19:06:45 2013 UTC vs.
Revision 1.50 by root, Thu Feb 25 02:29:22 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"
		14
		15	// compatibility with perl <5.18
		16	#ifndef HvNAMELEN_get
		17	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		18	#endif
		19	#ifndef HvNAMELEN
		20	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		21	#endif
		22	#ifndef HvNAMEUTF8
		23	# define HvNAMEUTF8(hv) 0
		24	#endif
		25	#ifndef SvREFCNT_dec_NN
		26	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		27	#endif
		28
		29	// known major and minor types
		30	enum cbor_type
		31	{
		32	MAJOR_SHIFT = 5,
		33	MINOR_MASK = 0x1f,
		34
		35	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		36	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		37	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		38	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		39	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		40	MAJOR_MAP = 5 << MAJOR_SHIFT,
		41	MAJOR_TAG = 6 << MAJOR_SHIFT,
		42	MAJOR_MISC = 7 << MAJOR_SHIFT,
		43
		44	// INT/STRING/ARRAY/MAP subtypes
		45	LENGTH_EXT1 = 24,
		46	LENGTH_EXT2 = 25,
		47	LENGTH_EXT4 = 26,
		48	LENGTH_EXT8 = 27,
		49
		50	// SIMPLE types (effectively MISC subtypes)
		51	SIMPLE_FALSE = 20,
		52	SIMPLE_TRUE = 21,
		53	SIMPLE_NULL = 22,
		54	SIMPLE_UNDEF = 23,
		55
		56	// MISC subtype (unused)
		57	MISC_EXT1 = 24,
		58	MISC_FLOAT16 = 25,
		59	MISC_FLOAT32 = 26,
		60	MISC_FLOAT64 = 27,
		61
		62	// BYTES/TEXT/ARRAY/MAP
		63	MINOR_INDEF = 31,
		64	};
13		65
14	// known tags	66	// known tags
15	enum cbor_tag	67	enum cbor_tag
16	{	68	{
17	// inofficial extensions (pending iana registration)	69	// extensions
18	CBOR_TAG_PERL_OBJECT = 256,	70	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
19	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
20		77
21	// rfc7049	78	// rfc7049
22	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	79	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
23	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	80	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
24	CBOR_TAG_POS_BIGNUM = 2, // byte string	81	CBOR_TAG_POS_BIGNUM = 2, // byte string
25	CBOR_TAG_NEG_BIGNUM = 3, // byte string	82	CBOR_TAG_NEG_BIGNUM = 3, // byte string
26	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	83	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
27	CBOR_TAG_BIGFLOAT = 5, // array	84	CBOR_TAG_BIGFLOAT = 5, // array
28		85
29	CBOR_TAG_CONV_B64U = 21, // base64url, any	86	CBOR_TAG_CONV_B64U = 21, // base64url, any
30	CBOR_TAG_CONV_B64 = 22, // base64, any	87	CBOR_TAG_CONV_B64 = 22, // base64, any
31	CBOR_TAG_CONV_HEX = 23, // base16, any	88	CBOR_TAG_CONV_HEX = 23, // base16, any
32	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	89	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
33		90
34	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	91	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
35	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	92	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
36	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	93	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
37	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	94	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
38	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	95	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
39		96
40	CBOR_TAG_MAGIC = 55799 // self-describe cbor	97	CBOR_TAG_MAGIC = 55799, // self-describe cbor
41	};	98	};
42		99
43	#define F_SHRINK 0x00000200UL	100	#define F_SHRINK 0x00000001UL
44	#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_VALIDATE_UTF8 0x00000020UL
45		106
46	#define INIT_SIZE 32 // initial scalar size to be allocated	107	#define INIT_SIZE 32 // initial scalar size to be allocated
47		108
48	#define SB do {	109	#define SB do {
49	#define SE } while (0)	110	#define SE } while (0)
…		…
61	# define CBOR_SLOW 0	122	# define CBOR_SLOW 0
62	# define CBOR_STASH cbor_stash	123	# define CBOR_STASH cbor_stash
63	#endif	124	#endif
64		125
65	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::	126	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
66	static SV *types_true, *types_false, *types_error, *sv_cbor;	127	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
67		128
68	typedef struct {	129	typedef struct {
69	U32 flags;	130	U32 flags;
70	U32 max_depth;	131	U32 max_depth;
71	STRLEN max_size;	132	STRLEN max_size;
		133	SV *filter;
		134
		135	// for the incremental parser
		136	STRLEN incr_pos; // the current offset into the text
		137	STRLEN incr_need; // minimum bytes needed to decode
		138	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
72	} CBOR;	139	} CBOR;
73		140
74	ecb_inline void	141	ecb_inline void
75	cbor_init (CBOR *cbor)	142	cbor_init (CBOR *cbor)
76	{	143	{
77	Zero (cbor, 1, CBOR);	144	Zero (cbor, 1, CBOR);
78	cbor->max_depth = 512;	145	cbor->max_depth = 512;
		146	}
		147
		148	ecb_inline void
		149	cbor_free (CBOR *cbor)
		150	{
		151	SvREFCNT_dec (cbor->filter);
		152	SvREFCNT_dec (cbor->incr_count);
79	}	153	}
80		154
81	/////////////////////////////////////////////////////////////////////////////	155	/////////////////////////////////////////////////////////////////////////////
82	// utility functions	156	// utility functions
83		157
…		…
105	SvPV_renew (sv, SvCUR (sv) + 1);	179	SvPV_renew (sv, SvCUR (sv) + 1);
106	#endif	180	#endif
107	}	181	}
108	}	182	}
109		183
110	/////////////////////////////////////////////////////////////////////////////	184	// minimum length of a string to be registered for stringref
111	// fp hell	185	ecb_inline int
112		186	minimum_string_length (UV idx)
113	//TODO	187	{
		188	return idx > 23
		189	? idx > 0xffU
		190	? idx > 0xffffU
		191	? idx > 0xffffffffU
		192	? 11
		193	: 7
		194	: 5
		195	: 4
		196	: 3;
		197	}
114		198
115	/////////////////////////////////////////////////////////////////////////////	199	/////////////////////////////////////////////////////////////////////////////
116	// encoder	200	// encoder
117		201
118	// structure used for encoding CBOR	202	// structure used for encoding CBOR
…		…
121	char *cur; // SvPVX (sv) + current output position	205	char *cur; // SvPVX (sv) + current output position
122	char *end; // SvEND (sv)	206	char *end; // SvEND (sv)
123	SV *sv; // result scalar	207	SV *sv; // result scalar
124	CBOR cbor;	208	CBOR cbor;
125	U32 depth; // recursion level	209	U32 depth; // recursion level
		210	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		211	UV stringref_idx;
		212	HV *shareable; // ptr => index, or 0
		213	UV shareable_idx;
126	} enc_t;	214	} enc_t;
127		215
128	ecb_inline void	216	ecb_inline void
129	need (enc_t *enc, STRLEN len)	217	need (enc_t *enc, STRLEN len)
130	{	218	{
…		…
147	static void	235	static void
148	encode_uint (enc_t *enc, int major, UV len)	236	encode_uint (enc_t *enc, int major, UV len)
149	{	237	{
150	need (enc, 9);	238	need (enc, 9);
151		239
152	if (len < 24)	240	if (ecb_expect_true (len < LENGTH_EXT1))
153	*enc->cur++ = major | len;	241	*enc->cur++ = major | len;
154	else if (len <= 0xff)	242	else if (ecb_expect_true (len <= 0xffU))
155	{	243	{
156	*enc->cur++ = major | 24;	244	*enc->cur++ = major | LENGTH_EXT1;
157	*enc->cur++ = len;	245	*enc->cur++ = len;
158	}	246	}
159	else if (len <= 0xffff)	247	else if (len <= 0xffffU)
160	{	248	{
161	*enc->cur++ = major | 25;	249	*enc->cur++ = major | LENGTH_EXT2;
162	*enc->cur++ = len >> 8;	250	*enc->cur++ = len >> 8;
163	*enc->cur++ = len;	251	*enc->cur++ = len;
164	}	252	}
165	else if (len <= 0xffffffff)	253	else if (len <= 0xffffffffU)
166	{	254	{
167	*enc->cur++ = major | 26;	255	*enc->cur++ = major | LENGTH_EXT4;
168	*enc->cur++ = len >> 24;	256	*enc->cur++ = len >> 24;
169	*enc->cur++ = len >> 16;	257	*enc->cur++ = len >> 16;
170	*enc->cur++ = len >> 8;	258	*enc->cur++ = len >> 8;
171	*enc->cur++ = len;	259	*enc->cur++ = len;
172	}	260	}
173	else	261	else
174	{	262	{
175	*enc->cur++ = major | 27;	263	*enc->cur++ = major | LENGTH_EXT8;
176	*enc->cur++ = len >> 56;	264	*enc->cur++ = len >> 56;
177	*enc->cur++ = len >> 48;	265	*enc->cur++ = len >> 48;
178	*enc->cur++ = len >> 40;	266	*enc->cur++ = len >> 40;
179	*enc->cur++ = len >> 32;	267	*enc->cur++ = len >> 32;
180	*enc->cur++ = len >> 24;	268	*enc->cur++ = len >> 24;
…		…
182	*enc->cur++ = len >> 8;	270	*enc->cur++ = len >> 8;
183	*enc->cur++ = len;	271	*enc->cur++ = len;
184	}	272	}
185	}	273	}
186		274
187	static void	275	ecb_inline void
		276	encode_tag (enc_t *enc, UV tag)
		277	{
		278	encode_uint (enc, MAJOR_TAG, tag);
		279	}
		280
		281	ecb_inline void
188	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	282	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)
189	{	283	{
190	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	284	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
191	need (enc, len);	285	need (enc, len);
192	memcpy (enc->cur, str, len);	286	memcpy (enc->cur, str, len);
193	enc->cur += len;	287	enc->cur += len;
194	}	288	}
195		289
		290	static void
		291	encode_strref (enc_t *enc, int utf8, char *str, STRLEN len)
		292	{
		293	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		294	{
		295	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		296
		297	if (SvOK (*svp))
		298	{
		299	// already registered, use stringref
		300	encode_tag (enc, CBOR_TAG_STRINGREF);
		301	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		302	return;
		303	}
		304	else if (len >= minimum_string_length (enc->stringref_idx))
		305	{
		306	// register only
		307	sv_setuv (*svp, enc->stringref_idx);
		308	++enc->stringref_idx;
		309	}
		310	}
		311
		312	encode_str (enc, utf8, str, len);
		313	}
		314
196	static void encode_sv (enc_t *enc, SV *sv);	315	static void encode_sv (enc_t *enc, SV *sv);
197		316
198	static void	317	static void
199	encode_av (enc_t *enc, AV *av)	318	encode_av (enc_t *enc, AV *av)
200	{	319	{
…		…
203	if (enc->depth >= enc->cbor.max_depth)	322	if (enc->depth >= enc->cbor.max_depth)
204	croak (ERR_NESTING_EXCEEDED);	323	croak (ERR_NESTING_EXCEEDED);
205		324
206	++enc->depth;	325	++enc->depth;
207		326
208	encode_uint (enc, 0x80, len + 1);	327	encode_uint (enc, MAJOR_ARRAY, len + 1);
209		328
		329	if (SvMAGICAL (av))
210	for (i = 0; i <= len; ++i)	330	for (i = 0; i <= len; ++i)
211	{	331	{
212	SV **svp = av_fetch (av, i, 0);	332	SV **svp = av_fetch (av, i, 0);
213	encode_sv (enc, svp ? *svp : &PL_sv_undef);	333	encode_sv (enc, svp ? *svp : &PL_sv_undef);
214	}	334	}
		335	else
		336	for (i = 0; i <= len; ++i)
		337	{
		338	SV *sv = AvARRAY (av)[i];
		339	encode_sv (enc, sv ? sv : &PL_sv_undef);
		340	}
215		341
216	--enc->depth;	342	--enc->depth;
217	}	343	}
218		344
219	static void	345	static void
…		…
228		354
229	int pairs = hv_iterinit (hv);	355	int pairs = hv_iterinit (hv);
230	int mg = SvMAGICAL (hv);	356	int mg = SvMAGICAL (hv);
231		357
232	if (mg)	358	if (mg)
233	encode_ch (enc, 0xa0 | 31);	359	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
234	else	360	else
235	encode_uint (enc, 0xa0, pairs);	361	encode_uint (enc, MAJOR_MAP, pairs);
236		362
237	while ((he = hv_iternext (hv)))	363	while ((he = hv_iternext (hv)))
238	{	364	{
239	if (HeKLEN (he) == HEf_SVKEY)	365	if (HeKLEN (he) == HEf_SVKEY)
240	encode_sv (enc, HeSVKEY (he));	366	encode_sv (enc, HeSVKEY (he));
241	else	367	else
242	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	368	encode_strref (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));
243		369
244	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	370	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
245	}	371	}
246		372
247	if (mg)	373	if (mg)
248	encode_ch (enc, 0xe0 | 31);	374	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
249		375
250	--enc->depth;	376	--enc->depth;
251	}	377	}
252		378
253	// encode objects, arrays and special \0=false and \1=true values.	379	// encode objects, arrays and special \0=false and \1=true values.
254	static void	380	static void
255	encode_rv (enc_t *enc, SV *sv)	381	encode_rv (enc_t *enc, SV *sv)
256	{	382	{
257	svtype svt;
258
259	SvGETMAGIC (sv);	383	SvGETMAGIC (sv);
		384
260	svt = SvTYPE (sv);	385	svtype svt = SvTYPE (sv);
261		386
262	if (ecb_expect_false (SvOBJECT (sv)))	387	if (ecb_expect_false (SvOBJECT (sv)))
263	{	388	{
264	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash	389	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
265	? types_boolean_stash	390	? types_boolean_stash
…		…
270	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	395	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
271	? cbor_tagged_stash	396	? cbor_tagged_stash
272	: gv_stashpv ("CBOR::XS::Tagged" , 1);	397	: gv_stashpv ("CBOR::XS::Tagged" , 1);
273		398
274	HV *stash = SvSTASH (sv);	399	HV *stash = SvSTASH (sv);
275	GV *method;
276		400
277	if (stash == boolean_stash)	401	if (stash == boolean_stash)
278	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	402	{
		403	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		404	return;
		405	}
279	else if (stash == error_stash)	406	else if (stash == error_stash)
280	encode_ch (enc, 0xe0 | 23);	407	{
		408	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		409	return;
		410	}
281	else if (stash == tagged_stash)	411	else if (stash == tagged_stash)
282	{	412	{
283	if (svt != SVt_PVAV)	413	if (svt != SVt_PVAV)
284	croak ("encountered CBOR::XS::Tagged object that isn't an array");	414	croak ("encountered CBOR::XS::Tagged object that isn't an array");
285		415
286	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	416	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
287	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));	417	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		418
		419	return;
		420	}
		421	}
		422
		423	if (ecb_expect_false (SvREFCNT (sv) > 1)
		424	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		425	{
		426	if (!enc->shareable)
		427	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		428
		429	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		430
		431	if (SvOK (*svp))
288	}	432	{
		433	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		434	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		435	return;
		436	}
		437	else
		438	{
		439	sv_setuv (*svp, enc->shareable_idx);
		440	++enc->shareable_idx;
		441	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		442	}
		443	}
		444
		445	if (ecb_expect_false (SvOBJECT (sv)))
		446	{
		447	HV *stash = SvSTASH (sv);
		448	GV *method;
		449
289	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))	450	if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
290	{	451	{
291	dSP;	452	dSP;
292		453
293	ENTER; SAVETMPS; PUSHMARK (SP);	454	ENTER; SAVETMPS;
		455	PUSHMARK (SP);
294	// we re-bless the reference to get overload and other niceties right	456	// we re-bless the reference to get overload and other niceties right
295	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	457	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
296		458
297	PUTBACK;	459	PUTBACK;
298	// G_SCALAR ensures that return value is 1	460	// G_SCALAR ensures that return value is 1
…		…
311	}	473	}
312	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)	474	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
313	{	475	{
314	dSP;	476	dSP;
315		477
316	ENTER; SAVETMPS; PUSHMARK (SP);	478	ENTER; SAVETMPS;
		479	SAVESTACK_POS ();
		480	PUSHMARK (SP);
317	EXTEND (SP, 2);	481	EXTEND (SP, 2);
318	// 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
319	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	483	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
320	PUSHs (sv_cbor);	484	PUSHs (sv_cbor);
321		485
…		…
325		489
326	// catch this surprisingly common error	490	// catch this surprisingly common error
327	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)	491	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
328	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));	492	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
329		493
330	encode_uint (enc, 0xc0, CBOR_TAG_PERL_OBJECT);	494	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
331	encode_uint (enc, 0x80, count + 1);	495	encode_uint (enc, MAJOR_ARRAY, count + 1);
332	encode_str (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));	496	encode_strref (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
333		497
334	while (count)	498	while (count)
335	encode_sv (enc, SP[1 - count--]);	499	encode_sv (enc, SP[1 - count--]);
336		500
337	PUTBACK;	501	PUTBACK;
…		…
344	}	508	}
345	else if (svt == SVt_PVHV)	509	else if (svt == SVt_PVHV)
346	encode_hv (enc, (HV *)sv);	510	encode_hv (enc, (HV *)sv);
347	else if (svt == SVt_PVAV)	511	else if (svt == SVt_PVAV)
348	encode_av (enc, (AV *)sv);	512	encode_av (enc, (AV *)sv);
349	else if (svt < SVt_PVAV)
350	{
351	STRLEN len = 0;
352	char *pv = svt ? SvPV (sv, len) : 0;
353
354	if (len == 1 && *pv == '1')
355	encode_ch (enc, 0xe0 | 21);
356	else if (len == 1 && *pv == '0')
357	encode_ch (enc, 0xe0 | 20);
358	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
359	encode_ch (enc, 0xe0 | 23);
360	else
361	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
362	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
363	}
364	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
365	encode_ch (enc, 0xe0 | 23);
366	else	513	else
367	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	514	{
368	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	515	encode_tag (enc, CBOR_TAG_INDIRECTION);
		516	encode_sv (enc, sv);
		517	}
369	}	518	}
370		519
371	static void	520	static void
372	encode_nv (enc_t *enc, SV *sv)	521	encode_nv (enc_t *enc, SV *sv)
373	{	522	{
374	double nv = SvNVX (sv);	523	double nv = SvNVX (sv);
375		524
376	need (enc, 9);	525	need (enc, 9);
377		526
378	if (ecb_expect_false (nv == (U32)nv))	527	if (ecb_expect_false (nv == (NV)(U32)nv))
379	encode_uint (enc, 0x00, (U32)nv);	528	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
380	//TODO: maybe I32?	529	//TODO: maybe I32?
381	else if (ecb_expect_false (nv == (float)nv))	530	else if (ecb_expect_false (nv == (float)nv))
382	{	531	{
383	uint32_t fp = ecb_float_to_binary32 (nv);	532	uint32_t fp = ecb_float_to_binary32 (nv);
384		533
385	*enc->cur++ = 0xe0 | 26;	534	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
386		535
387	if (!ecb_big_endian ())	536	if (!ecb_big_endian ())
388	fp = ecb_bswap32 (fp);	537	fp = ecb_bswap32 (fp);
389		538
390	memcpy (enc->cur, &fp, 4);	539	memcpy (enc->cur, &fp, 4);
…		…
392	}	541	}
393	else	542	else
394	{	543	{
395	uint64_t fp = ecb_double_to_binary64 (nv);	544	uint64_t fp = ecb_double_to_binary64 (nv);
396		545
397	*enc->cur++ = 0xe0 | 27;	546	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
398		547
399	if (!ecb_big_endian ())	548	if (!ecb_big_endian ())
400	fp = ecb_bswap64 (fp);	549	fp = ecb_bswap64 (fp);
401		550
402	memcpy (enc->cur, &fp, 8);	551	memcpy (enc->cur, &fp, 8);
…		…
411		560
412	if (SvPOKp (sv))	561	if (SvPOKp (sv))
413	{	562	{
414	STRLEN len;	563	STRLEN len;
415	char *str = SvPV (sv, len);	564	char *str = SvPV (sv, len);
416	encode_str (enc, SvUTF8 (sv), str, len);	565	encode_strref (enc, SvUTF8 (sv), str, len);
417	}	566	}
418	else if (SvNOKp (sv))	567	else if (SvNOKp (sv))
419	encode_nv (enc, sv);	568	encode_nv (enc, sv);
420	else if (SvIOKp (sv))	569	else if (SvIOKp (sv))
421	{	570	{
422	if (SvIsUV (sv))	571	if (SvIsUV (sv))
423	encode_uint (enc, 0x00, SvUVX (sv));	572	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
424	else if (SvIVX (sv) >= 0)	573	else if (SvIVX (sv) >= 0)
425	encode_uint (enc, 0x00, SvIVX (sv));	574	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
426	else	575	else
427	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	576	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
428	}	577	}
429	else if (SvROK (sv))	578	else if (SvROK (sv))
430	encode_rv (enc, SvRV (sv));	579	encode_rv (enc, SvRV (sv));
431	else if (!SvOK (sv))	580	else if (!SvOK (sv))
432	encode_ch (enc, 0xe0 | 22);	581	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
433	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	582	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
434	encode_ch (enc, 0xe0 | 23);	583	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
435	else	584	else
436	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	585	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
437	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	586	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
438	}	587	}
439		588
440	static SV *	589	static SV *
441	encode_cbor (SV *scalar, CBOR *cbor)	590	encode_cbor (SV *scalar, CBOR *cbor)
442	{	591	{
443	enc_t enc;	592	enc_t enc = { 0 };
444		593
445	enc.cbor = *cbor;	594	enc.cbor = *cbor;
446	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	595	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
447	enc.cur = SvPVX (enc.sv);	596	enc.cur = SvPVX (enc.sv);
448	enc.end = SvEND (enc.sv);	597	enc.end = SvEND (enc.sv);
449	enc.depth = 0;
450		598
451	SvPOK_only (enc.sv);	599	SvPOK_only (enc.sv);
		600
		601	if (cbor->flags & F_PACK_STRINGS)
		602	{
		603	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		604	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		605	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		606	}
		607
452	encode_sv (&enc, scalar);	608	encode_sv (&enc, scalar);
453		609
454	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	610	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
455	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	611	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
456		612
…		…
470	U8 *end; // end of input string	626	U8 *end; // end of input string
471	const char *err; // parse error, if != 0	627	const char *err; // parse error, if != 0
472	CBOR cbor;	628	CBOR cbor;
473	U32 depth; // recursion depth	629	U32 depth; // recursion depth
474	U32 maxdepth; // recursion depth limit	630	U32 maxdepth; // recursion depth limit
		631	AV *shareable;
		632	AV *stringref;
		633	SV *decode_tagged;
475	} dec_t;	634	} dec_t;
476		635
477	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	636	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE
478		637
479	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	638	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")
…		…
482	#define DEC_DEC_DEPTH --dec->depth	641	#define DEC_DEC_DEPTH --dec->depth
483		642
484	static UV	643	static UV
485	decode_uint (dec_t *dec)	644	decode_uint (dec_t *dec)
486	{	645	{
487	switch (*dec->cur & 31)	646	U8 m = *dec->cur & MINOR_MASK;
488	{	647	++dec->cur;
489	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
490	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
491	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
492	return *dec->cur++ & 31;
493		648
494	case 24:	649	if (ecb_expect_true (m < LENGTH_EXT1))
		650	return m;
		651	else if (ecb_expect_true (m == LENGTH_EXT1))
		652	{
495	WANT (2);	653	WANT (1);
496	dec->cur += 2;	654	dec->cur += 1;
497	return dec->cur[-1];	655	return dec->cur[-1];
498		656	}
499	case 25:	657	else if (ecb_expect_true (m == LENGTH_EXT2))
		658	{
500	WANT (3);	659	WANT (2);
501	dec->cur += 3;	660	dec->cur += 2;
502	return (((UV)dec->cur[-2]) << 8)	661	return (((UV)dec->cur[-2]) << 8)
503	| ((UV)dec->cur[-1]);	662	| ((UV)dec->cur[-1]);
504		663	}
505	case 26:	664	else if (ecb_expect_true (m == LENGTH_EXT4))
		665	{
506	WANT (5);	666	WANT (4);
507	dec->cur += 5;	667	dec->cur += 4;
508	return (((UV)dec->cur[-4]) << 24)	668	return (((UV)dec->cur[-4]) << 24)
509	| (((UV)dec->cur[-3]) << 16)	669	| (((UV)dec->cur[-3]) << 16)
510	| (((UV)dec->cur[-2]) << 8)	670	| (((UV)dec->cur[-2]) << 8)
511	| ((UV)dec->cur[-1]);	671	| ((UV)dec->cur[-1]);
512		672	}
513	case 27:	673	else if (ecb_expect_true (m == LENGTH_EXT8))
		674	{
514	WANT (9);	675	WANT (8);
515	dec->cur += 9;	676	dec->cur += 8;
		677
		678	return
		679	#if UVSIZE < 8
		680	0
		681	#else
516	return (((UV)dec->cur[-8]) << 56)	682	(((UV)dec->cur[-8]) << 56)
517	| (((UV)dec->cur[-7]) << 48)	683	| (((UV)dec->cur[-7]) << 48)
518	| (((UV)dec->cur[-6]) << 40)	684	| (((UV)dec->cur[-6]) << 40)
519	| (((UV)dec->cur[-5]) << 32)	685	| (((UV)dec->cur[-5]) << 32)
		686	#endif
520	| (((UV)dec->cur[-4]) << 24)	687	| (((UV)dec->cur[-4]) << 24)
521	| (((UV)dec->cur[-3]) << 16)	688	| (((UV)dec->cur[-3]) << 16)
522	| (((UV)dec->cur[-2]) << 8)	689	| (((UV)dec->cur[-2]) << 8)
523	| ((UV)dec->cur[-1]);	690	| ((UV)dec->cur[-1]);
524		691	}
525	default:	692	else
526	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	693	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
527	}
528		694
529	fail:	695	fail:
530	return 0;	696	return 0;
531	}	697	}
532		698
…		…
537	{	703	{
538	AV *av = newAV ();	704	AV *av = newAV ();
539		705
540	DEC_INC_DEPTH;	706	DEC_INC_DEPTH;
541		707
542	if ((*dec->cur & 31) == 31)	708	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
543	{	709	{
544	++dec->cur;	710	++dec->cur;
545		711
546	for (;;)	712	for (;;)
547	{	713	{
548	WANT (1);	714	WANT (1);
549		715
550	if (*dec->cur == (0xe0 | 31))	716	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
551	{	717	{
552	++dec->cur;	718	++dec->cur;
553	break;	719	break;
554	}	720	}
555		721
…		…
558	}	724	}
559	else	725	else
560	{	726	{
561	int i, len = decode_uint (dec);	727	int i, len = decode_uint (dec);
562		728
		729	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
563	av_fill (av, len - 1);	730	av_fill (av, len - 1);
564		731
565	for (i = 0; i < len; ++i)	732	for (i = 0; i < len; ++i)
566	AvARRAY (av)[i] = decode_sv (dec);	733	AvARRAY (av)[i] = decode_sv (dec);
567	}	734	}
…		…
573	SvREFCNT_dec (av);	740	SvREFCNT_dec (av);
574	DEC_DEC_DEPTH;	741	DEC_DEC_DEPTH;
575	return &PL_sv_undef;	742	return &PL_sv_undef;
576	}	743	}
577		744
		745	static void
		746	decode_he (dec_t *dec, HV *hv)
		747	{
		748	// for speed reasons, we specialcase single-string
		749	// byte or utf-8 strings as keys, but only when !stringref
		750
		751	if (ecb_expect_true (!dec->stringref))
		752	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		753	{
		754	I32 len = decode_uint (dec);
		755	char *key = (char *)dec->cur;
		756
		757	WANT (len);
		758	dec->cur += len;
		759
		760	hv_store (hv, key, len, decode_sv (dec), 0);
		761
		762	return;
		763	}
		764	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		765	{
		766	I32 len = decode_uint (dec);
		767	char *key = (char *)dec->cur;
		768
		769	WANT (len);
		770	dec->cur += len;
		771
		772	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		773	if (!is_utf8_string (key, len))
		774	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		775
		776	hv_store (hv, key, -len, decode_sv (dec), 0);
		777
		778	return;
		779	}
		780
		781	SV *k = decode_sv (dec);
		782	SV *v = decode_sv (dec);
		783
		784	hv_store_ent (hv, k, v, 0);
		785	SvREFCNT_dec (k);
		786
		787	fail:
		788	;
		789	}
		790
578	static SV *	791	static SV *
579	decode_hv (dec_t *dec)	792	decode_hv (dec_t *dec)
580	{	793	{
581	HV *hv = newHV ();	794	HV *hv = newHV ();
582		795
583	DEC_INC_DEPTH;	796	DEC_INC_DEPTH;
584		797
585	if ((*dec->cur & 31) == 31)	798	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
586	{	799	{
587	++dec->cur;	800	++dec->cur;
588		801
589	for (;;)	802	for (;;)
590	{	803	{
591	WANT (1);	804	WANT (1);
592		805
593	if (*dec->cur == (0xe0 | 31))	806	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
594	{	807	{
595	++dec->cur;	808	++dec->cur;
596	break;	809	break;
597	}	810	}
598		811
599	SV *k = decode_sv (dec);	812	decode_he (dec, hv);
600	SV *v = decode_sv (dec);
601
602	hv_store_ent (hv, k, v, 0);
603	SvREFCNT_dec (k);
604	}	813	}
605	}	814	}
606	else	815	else
607	{	816	{
608	int len = decode_uint (dec);	817	int pairs = decode_uint (dec);
609		818
610	while (len--)	819	while (pairs--)
611	{	820	decode_he (dec, hv);
612	SV *k = decode_sv (dec);
613	SV *v = decode_sv (dec);
614
615	hv_store_ent (hv, k, v, 0);
616	SvREFCNT_dec (k);
617	}
618	}	821	}
619		822
620	DEC_DEC_DEPTH;	823	DEC_DEC_DEPTH;
621	return newRV_noinc ((SV *)hv);	824	return newRV_noinc ((SV *)hv);
622		825
…		…
629	static SV *	832	static SV *
630	decode_str (dec_t *dec, int utf8)	833	decode_str (dec_t *dec, int utf8)
631	{	834	{
632	SV *sv = 0;	835	SV *sv = 0;
633		836
634	if ((*dec->cur & 31) == 31)	837	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
635	{	838	{
		839	// indefinite length strings
636	++dec->cur;	840	++dec->cur;
637		841
		842	U8 major = *dec->cur & MAJOR_MISC;
		843
638	sv = newSVpvn ("", 0);	844	sv = newSVpvn ("", 0);
639		845
640	// not very fast, and certainly not robust against illegal input
641	for (;;)	846	for (;;)
642	{	847	{
643	WANT (1);	848	WANT (1);
644		849
645	if (*dec->cur == (0xe0 | 31))	850	if ((*dec->cur - major) > LENGTH_EXT8)
		851	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
646	{	852	{
647	++dec->cur;	853	++dec->cur;
648	break;	854	break;
649	}	855	}
		856	else
		857	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
650		858
651	sv_catsv (sv, decode_sv (dec));	859	STRLEN len = decode_uint (dec);
		860
		861	WANT (len);
		862	sv_catpvn (sv, dec->cur, len);
		863	dec->cur += len;
652	}	864	}
653	}	865	}
654	else	866	else
655	{	867	{
656	STRLEN len = decode_uint (dec);	868	STRLEN len = decode_uint (dec);
657		869
658	WANT (len);	870	WANT (len);
659	sv = newSVpvn (dec->cur, len);	871	sv = newSVpvn (dec->cur, len);
660	dec->cur += len;	872	dec->cur += len;
		873
		874	if (ecb_expect_false (dec->stringref)
		875	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		876	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
661	}	877	}
662		878
663	if (utf8)	879	if (utf8)
		880	{
		881	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		882	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		883	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		884
664	SvUTF8_on (sv);	885	SvUTF8_on (sv);
		886	}
665		887
666	return sv;	888	return sv;
667		889
668	fail:	890	fail:
669	SvREFCNT_dec (sv);	891	SvREFCNT_dec (sv);
…		…
671	}	893	}
672		894
673	static SV *	895	static SV *
674	decode_tagged (dec_t *dec)	896	decode_tagged (dec_t *dec)
675	{	897	{
		898	SV *sv = 0;
676	UV tag = decode_uint (dec);	899	UV tag = decode_uint (dec);
		900
		901	WANT (1);
		902
		903	switch (tag)
		904	{
		905	case CBOR_TAG_MAGIC:
677	SV *sv = decode_sv (dec);	906	sv = decode_sv (dec);
		907	break;
678		908
679	if (tag == CBOR_TAG_MAGIC)	909	case CBOR_TAG_INDIRECTION:
680	return sv;	910	sv = newRV_noinc (decode_sv (dec));
681	else if (tag == CBOR_TAG_PERL_OBJECT)	911	break;
682	{	912
		913	case CBOR_TAG_STRINGREF_NAMESPACE:
		914	{
		915	ENTER; SAVETMPS;
		916
		917	SAVESPTR (dec->stringref);
		918	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		919
		920	sv = decode_sv (dec);
		921
		922	FREETMPS; LEAVE;
		923	}
		924	break;
		925
		926	case CBOR_TAG_STRINGREF:
		927	{
		928	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		929	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		930
		931	UV idx = decode_uint (dec);
		932
		933	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		934	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		935
		936	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		937	}
		938	break;
		939
		940	case CBOR_TAG_VALUE_SHAREABLE:
		941	{
		942	if (ecb_expect_false (!dec->shareable))
		943	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		944
		945	if (dec->cbor.flags & F_ALLOW_CYCLES)
		946	{
		947	sv = newSV (0);
		948	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		949
		950	SV *osv = decode_sv (dec);
		951	sv_setsv (sv, osv);
		952	SvREFCNT_dec_NN (osv);
		953	}
		954	else
		955	{
		956	av_push (dec->shareable, &PL_sv_undef);
		957	int idx = AvFILLp (dec->shareable);
		958	sv = decode_sv (dec);
		959	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		960	}
		961	}
		962	break;
		963
		964	case CBOR_TAG_VALUE_SHAREDREF:
		965	{
		966	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		967	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		968
		969	UV idx = decode_uint (dec);
		970
		971	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		972	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		973
		974	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		975
		976	if (sv == &PL_sv_undef)
		977	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		978	}
		979	break;
		980
		981	case CBOR_TAG_PERL_OBJECT:
		982	{
		983	sv = decode_sv (dec);
		984
683	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)	985	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
684	ERR ("corrupted CBOR data (non-array perl object)");	986	ERR ("corrupted CBOR data (non-array perl object)");
685		987
686	AV *av = (AV *)SvRV (sv);	988	AV *av = (AV *)SvRV (sv);
687	int len = av_len (av) + 1;	989	int len = av_len (av) + 1;
688	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);	990	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
689		991
690	if (!stash)	992	if (!stash)
691	ERR ("cannot decode perl-object (package does not exist)");	993	ERR ("cannot decode perl-object (package does not exist)");
692		994
693	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);	995	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
694		996
695	if (!method)	997	if (!method)
696	ERR ("cannot decode perl-object (package does not have a THAW method)");	998	ERR ("cannot decode perl-object (package does not have a THAW method)");
697		999
698	dSP;	1000	dSP;
699		1001
700	ENTER; SAVETMPS; PUSHMARK (SP);	1002	ENTER; SAVETMPS;
		1003	PUSHMARK (SP);
701	EXTEND (SP, len + 1);	1004	EXTEND (SP, len + 1);
702	// we re-bless the reference to get overload and other niceties right	1005	// we re-bless the reference to get overload and other niceties right
703	PUSHs (*av_fetch (av, 0, 1));	1006	PUSHs (*av_fetch (av, 0, 1));
704	PUSHs (sv_cbor);	1007	PUSHs (sv_cbor);
705		1008
706	int i;	1009	int i;
707		1010
708	for (i = 1; i < len; ++i)	1011	for (i = 1; i < len; ++i)
709	PUSHs (*av_fetch (av, i, 1));	1012	PUSHs (*av_fetch (av, i, 1));
710		1013
711	PUTBACK;	1014	PUTBACK;
712	call_sv ((SV *)GvCV (method), G_SCALAR);	1015	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
713	SPAGAIN;	1016	SPAGAIN;
714		1017
		1018	if (SvTRUE (ERRSV))
		1019	{
		1020	FREETMPS; LEAVE;
		1021	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1022	}
		1023
		1024	SvREFCNT_dec (sv);
715	sv = SvREFCNT_inc (POPs);	1025	sv = SvREFCNT_inc (POPs);
716		1026
717	PUTBACK;	1027	PUTBACK;
718		1028
719	FREETMPS; LEAVE;	1029	FREETMPS; LEAVE;
		1030	}
		1031	break;
720		1032
721	return sv;	1033	default:
722	}	1034	{
723	else	1035	sv = decode_sv (dec);
724	{	1036
		1037	dSP;
		1038	ENTER; SAVETMPS;
		1039	SAVESTACK_POS ();
		1040	PUSHMARK (SP);
		1041	EXTEND (SP, 2);
		1042	PUSHs (newSVuv (tag));
		1043	PUSHs (sv);
		1044
		1045	PUTBACK;
		1046	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1047	SPAGAIN;
		1048
		1049	if (SvTRUE (ERRSV))
		1050	{
		1051	FREETMPS; LEAVE;
		1052	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1053	}
		1054
		1055	if (count)
		1056	{
		1057	SvREFCNT_dec (sv);
		1058	sv = SvREFCNT_inc (POPs);
		1059	}
		1060	else
		1061	{
725	AV *av = newAV ();	1062	AV *av = newAV ();
726	av_push (av, newSVuv (tag));	1063	av_push (av, newSVuv (tag));
727	av_push (av, sv);	1064	av_push (av, sv);
728		1065
729	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	1066	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
730	? cbor_tagged_stash	1067	? cbor_tagged_stash
731	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1068	: gv_stashpv ("CBOR::XS::Tagged" , 1);
732
733	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);	1069	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1070	}
		1071
		1072	PUTBACK;
		1073
		1074	FREETMPS; LEAVE;
		1075	}
		1076	break;
734	}	1077	}
		1078
		1079	return sv;
735		1080
736	fail:	1081	fail:
737	SvREFCNT_dec (sv);	1082	SvREFCNT_dec (sv);
738	return &PL_sv_undef;	1083	return &PL_sv_undef;
739	}	1084	}
…		…
741	static SV *	1086	static SV *
742	decode_sv (dec_t *dec)	1087	decode_sv (dec_t *dec)
743	{	1088	{
744	WANT (1);	1089	WANT (1);
745		1090
746	switch (*dec->cur >> 5)	1091	switch (*dec->cur >> MAJOR_SHIFT)
747	{	1092	{
748	case 0: // unsigned int	1093	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
749	return newSVuv (decode_uint (dec));	1094	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
750	case 1: // negative int	1095	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
751	return newSViv (-1 - (IV)decode_uint (dec));	1096	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
752	case 2: // octet string	1097	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
753	return decode_str (dec, 0);	1098	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
754	case 3: // utf-8 string	1099	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
755	return decode_str (dec, 1);	1100
756	case 4: // array	1101	case MAJOR_MISC >> MAJOR_SHIFT:
757	return decode_av (dec);
758	case 5: // map
759	return decode_hv (dec);
760	case 6: // tag
761	return decode_tagged (dec);
762	case 7: // misc
763	switch (*dec->cur++ & 31)	1102	switch (*dec->cur++ & MINOR_MASK)
764	{	1103	{
765	case 20:	1104	case SIMPLE_FALSE:
766	#if CBOR_SLOW	1105	#if CBOR_SLOW
767	types_false = get_bool ("Types::Serialiser::false");	1106	types_false = get_bool ("Types::Serialiser::false");
768	#endif	1107	#endif
769	return newSVsv (types_false);	1108	return newSVsv (types_false);
770	case 21:	1109	case SIMPLE_TRUE:
771	#if CBOR_SLOW	1110	#if CBOR_SLOW
772	types_true = get_bool ("Types::Serialiser::true");	1111	types_true = get_bool ("Types::Serialiser::true");
773	#endif	1112	#endif
774	return newSVsv (types_true);	1113	return newSVsv (types_true);
775	case 22:	1114	case SIMPLE_NULL:
776	return newSVsv (&PL_sv_undef);	1115	return newSVsv (&PL_sv_undef);
777	case 23:	1116	case SIMPLE_UNDEF:
778	#if CBOR_SLOW	1117	#if CBOR_SLOW
779	types_error = get_bool ("Types::Serialiser::error");	1118	types_error = get_bool ("Types::Serialiser::error");
780	#endif	1119	#endif
781	return newSVsv (types_error);	1120	return newSVsv (types_error);
782		1121
783	case 25:	1122	case MISC_FLOAT16:
784	{	1123	{
785	WANT (2);	1124	WANT (2);
786		1125
787	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1126	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
788	dec->cur += 2;	1127	dec->cur += 2;
789		1128
790	return newSVnv (ecb_binary16_to_float (fp));	1129	return newSVnv (ecb_binary16_to_float (fp));
791	}	1130	}
792		1131
793	case 26:	1132	case MISC_FLOAT32:
794	{	1133	{
795	uint32_t fp;	1134	uint32_t fp;
796	WANT (4);	1135	WANT (4);
797	memcpy (&fp, dec->cur, 4);	1136	memcpy (&fp, dec->cur, 4);
798	dec->cur += 4;	1137	dec->cur += 4;
…		…
801	fp = ecb_bswap32 (fp);	1140	fp = ecb_bswap32 (fp);
802		1141
803	return newSVnv (ecb_binary32_to_float (fp));	1142	return newSVnv (ecb_binary32_to_float (fp));
804	}	1143	}
805		1144
806	case 27:	1145	case MISC_FLOAT64:
807	{	1146	{
808	uint64_t fp;	1147	uint64_t fp;
809	WANT (8);	1148	WANT (8);
810	memcpy (&fp, dec->cur, 8);	1149	memcpy (&fp, dec->cur, 8);
811	dec->cur += 8;	1150	dec->cur += 8;
…		…
814	fp = ecb_bswap64 (fp);	1153	fp = ecb_bswap64 (fp);
815		1154
816	return newSVnv (ecb_binary64_to_double (fp));	1155	return newSVnv (ecb_binary64_to_double (fp));
817	}	1156	}
818		1157
819	// 0..19 unassigned	1158	// 0..19 unassigned simple
820	// 24 reserved + unassigned (reserved values are not encodable)	1159	// 24 reserved + unassigned simple (reserved values are not encodable)
		1160	// 28-30 unassigned misc
		1161	// 31 break code
821	default:	1162	default:
822	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1163	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
823	}	1164	}
824		1165
825	break;	1166	break;
826	}	1167	}
827		1168
…		…
830	}	1171	}
831		1172
832	static SV *	1173	static SV *
833	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1174	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
834	{	1175	{
835	dec_t dec;	1176	dec_t dec = { 0 };
836	SV *sv;	1177	SV *sv;
		1178	STRLEN len;
		1179	char *data = SvPVbyte (string, len);
837		1180
838	/* work around bugs in 5.10 where manipulating magic values
839	* makes perl ignore the magic in subsequent accesses.
840	* also make a copy of non-PV values, to get them into a clean
841	* state (SvPV should do that, but it's buggy, see below).
842	*/
843	/*SvGETMAGIC (string);*/
844	if (SvMAGICAL (string) || !SvPOK (string))
845	string = sv_2mortal (newSVsv (string));
846
847	SvUPGRADE (string, SVt_PV);
848
849	/* work around a bug in perl 5.10, which causes SvCUR to fail an
850	* assertion with -DDEBUGGING, although SvCUR is documented to
851	* return the xpv_cur field which certainly exists after upgrading.
852	* according to nicholas clark, calling SvPOK fixes this.
853	* But it doesn't fix it, so try another workaround, call SvPV_nolen
854	* and hope for the best.
855	* Damnit, SvPV_nolen still trips over yet another assertion. This
856	* assertion business is seriously broken, try yet another workaround
857	* for the broken -DDEBUGGING.
858	*/
859	{
860	#ifdef DEBUGGING
861	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
862	#else
863	STRLEN offset = SvCUR (string);
864	#endif
865
866	if (offset > cbor->max_size && cbor->max_size)	1181	if (len > cbor->max_size && cbor->max_size)
867	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1182	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
868	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1183	(unsigned long)len, (unsigned long)cbor->max_size);
869	}
870
871	sv_utf8_downgrade (string, 0);
872		1184
873	dec.cbor = *cbor;	1185	dec.cbor = *cbor;
874	dec.cur = (U8 *)SvPVX (string);	1186	dec.cur = (U8 *)data;
875	dec.end = (U8 *)SvEND (string);	1187	dec.end = (U8 *)data + len;
876	dec.err = 0;
877	dec.depth = 0;
878		1188
879	sv = decode_sv (&dec);	1189	sv = decode_sv (&dec);
880		1190
881	if (offset_return)	1191	if (offset_return)
882	*offset_return = dec.cur;	1192	*offset_return = dec.cur;
…		…
885	if (dec.cur != dec.end && !dec.err)	1195	if (dec.cur != dec.end && !dec.err)
886	dec.err = "garbage after CBOR object";	1196	dec.err = "garbage after CBOR object";
887		1197
888	if (dec.err)	1198	if (dec.err)
889	{	1199	{
		1200	if (dec.shareable)
		1201	{
		1202	// need to break cyclic links, which whould all be in shareable
		1203	int i;
		1204	SV **svp;
		1205
		1206	for (i = av_len (dec.shareable) + 1; i--; )
		1207	if ((svp = av_fetch (dec.shareable, i, 0)))
		1208	sv_setsv (*svp, &PL_sv_undef);
		1209	}
		1210
890	SvREFCNT_dec (sv);	1211	SvREFCNT_dec (sv);
891	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1212	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
892	}	1213	}
893		1214
894	sv = sv_2mortal (sv);	1215	sv = sv_2mortal (sv);
895		1216
896	return sv;	1217	return sv;
897	}	1218	}
898		1219
		1220	/////////////////////////////////////////////////////////////////////////////
		1221	// incremental parser
		1222
		1223	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1224
		1225	// returns 0 for notyet, 1 for success or error
		1226	static int
		1227	incr_parse (CBOR *self, SV *cborstr)
		1228	{
		1229	STRLEN cur;
		1230	SvPV (cborstr, cur);
		1231
		1232	while (ecb_expect_true (self->incr_need <= cur))
		1233	{
		1234	// table of integer count bytes
		1235	static I8 incr_len[MINOR_MASK + 1] = {
		1236	0, 0, 0, 0, 0, 0, 0, 0,
		1237	0, 0, 0, 0, 0, 0, 0, 0,
		1238	0, 0, 0, 0, 0, 0, 0, 0,
		1239	1, 2, 4, 8,-1,-1,-1,-2
		1240	};
		1241
		1242	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1243	U8 m = *p & MINOR_MASK;
		1244	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1245	I8 ilen = incr_len[m];
		1246
		1247	self->incr_need = self->incr_pos + 1;
		1248
		1249	if (ecb_expect_false (ilen < 0))
		1250	{
		1251	if (m != MINOR_INDEF)
		1252	return 1; // error
		1253
		1254	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1255	{
		1256	if (count >= 0)
		1257	return 1; // error
		1258
		1259	count = 1;
		1260	}
		1261	else
		1262	{
		1263	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1264	count = -1;
		1265	}
		1266	}
		1267	else
		1268	{
		1269	self->incr_need += ilen;
		1270	if (ecb_expect_false (self->incr_need > cur))
		1271	return 0;
		1272
		1273	int major = *p >> MAJOR_SHIFT;
		1274
		1275	switch (major)
		1276	{
		1277	case MAJOR_TAG >> MAJOR_SHIFT:
		1278	++count; // tags merely prefix another value
		1279	break;
		1280
		1281	case MAJOR_BYTES >> MAJOR_SHIFT:
		1282	case MAJOR_TEXT >> MAJOR_SHIFT:
		1283	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1284	case MAJOR_MAP >> MAJOR_SHIFT:
		1285	{
		1286	UV len;
		1287
		1288	if (ecb_expect_false (ilen))
		1289	{
		1290	len = 0;
		1291
		1292	do {
		1293	len = (len << 8) | *++p;
		1294	} while (--ilen);
		1295	}
		1296	else
		1297	len = m;
		1298
		1299	switch (major)
		1300	{
		1301	case MAJOR_BYTES >> MAJOR_SHIFT:
		1302	case MAJOR_TEXT >> MAJOR_SHIFT:
		1303	self->incr_need += len;
		1304	if (ecb_expect_false (self->incr_need > cur))
		1305	return 0;
		1306
		1307	break;
		1308
		1309	case MAJOR_MAP >> MAJOR_SHIFT:
		1310	len <<= 1;
		1311	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1312	if (len)
		1313	{
		1314	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1315	count = len + 1;
		1316	}
		1317	break;
		1318	}
		1319	}
		1320	}
		1321	}
		1322
		1323	self->incr_pos = self->incr_need;
		1324
		1325	if (count > 0)
		1326	{
		1327	while (!--count)
		1328	{
		1329	if (!AvFILLp (self->incr_count))
		1330	return 1; // done
		1331
		1332	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1333	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1334	}
		1335
		1336	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1337	}
		1338	}
		1339
		1340	return 0;
		1341	}
		1342
		1343
899	/////////////////////////////////////////////////////////////////////////////	1344	/////////////////////////////////////////////////////////////////////////////
900	// XS interface functions	1345	// XS interface functions
901		1346
902	MODULE = CBOR::XS PACKAGE = CBOR::XS	1347	MODULE = CBOR::XS PACKAGE = CBOR::XS
903		1348
…		…
910	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);	1355	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
911		1356
912	types_true = get_bool ("Types::Serialiser::true" );	1357	types_true = get_bool ("Types::Serialiser::true" );
913	types_false = get_bool ("Types::Serialiser::false");	1358	types_false = get_bool ("Types::Serialiser::false");
914	types_error = get_bool ("Types::Serialiser::error");	1359	types_error = get_bool ("Types::Serialiser::error");
		1360
		1361	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
915		1362
916	sv_cbor = newSVpv ("CBOR", 0);	1363	sv_cbor = newSVpv ("CBOR", 0);
917	SvREADONLY_on (sv_cbor);	1364	SvREADONLY_on (sv_cbor);
918	}	1365	}
919		1366
…		…
940		1387
941	void shrink (CBOR *self, int enable = 1)	1388	void shrink (CBOR *self, int enable = 1)
942	ALIAS:	1389	ALIAS:
943	shrink = F_SHRINK	1390	shrink = F_SHRINK
944	allow_unknown = F_ALLOW_UNKNOWN	1391	allow_unknown = F_ALLOW_UNKNOWN
		1392	allow_sharing = F_ALLOW_SHARING
		1393	allow_cycles = F_ALLOW_CYCLES
		1394	pack_strings = F_PACK_STRINGS
		1395	validate_utf8 = F_VALIDATE_UTF8
945	PPCODE:	1396	PPCODE:
946	{	1397	{
947	if (enable)	1398	if (enable)
948	self->flags |= ix;	1399	self->flags |= ix;
949	else	1400	else
…		…
954		1405
955	void get_shrink (CBOR *self)	1406	void get_shrink (CBOR *self)
956	ALIAS:	1407	ALIAS:
957	get_shrink = F_SHRINK	1408	get_shrink = F_SHRINK
958	get_allow_unknown = F_ALLOW_UNKNOWN	1409	get_allow_unknown = F_ALLOW_UNKNOWN
		1410	get_allow_sharing = F_ALLOW_SHARING
		1411	get_allow_cycles = F_ALLOW_CYCLES
		1412	get_pack_strings = F_PACK_STRINGS
		1413	get_validate_utf8 = F_VALIDATE_UTF8
959	PPCODE:	1414	PPCODE:
960	XPUSHs (boolSV (self->flags & ix));	1415	XPUSHs (boolSV (self->flags & ix));
961		1416
962	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1417	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
963	PPCODE:	1418	PPCODE:
…		…
979	CODE:	1434	CODE:
980	RETVAL = self->max_size;	1435	RETVAL = self->max_size;
981	OUTPUT:	1436	OUTPUT:
982	RETVAL	1437	RETVAL
983		1438
984	#if 0 //TODO	1439	void filter (CBOR *self, SV *filter = 0)
985
986	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
987	PPCODE:	1440	PPCODE:
988	{
989	SvREFCNT_dec (self->cb_object);	1441	SvREFCNT_dec (self->filter);
990	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1442	self->filter = filter ? newSVsv (filter) : filter;
991
992	XPUSHs (ST (0));	1443	XPUSHs (ST (0));
993	}
994		1444
995	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1445	SV *get_filter (CBOR *self)
996	PPCODE:	1446	CODE:
997	{	1447	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
998	if (!self->cb_sk_object)	1448	OUTPUT:
999	self->cb_sk_object = newHV ();	1449	RETVAL
1000
1001	if (SvOK (cb))
1002	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1003	else
1004	{
1005	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1006
1007	if (!HvKEYS (self->cb_sk_object))
1008	{
1009	SvREFCNT_dec (self->cb_sk_object);
1010	self->cb_sk_object = 0;
1011	}
1012	}
1013
1014	XPUSHs (ST (0));
1015	}
1016
1017	#endif
1018		1450
1019	void encode (CBOR *self, SV *scalar)	1451	void encode (CBOR *self, SV *scalar)
1020	PPCODE:	1452	PPCODE:
1021	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1453	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1022	XPUSHs (scalar);	1454	XPUSHs (scalar);
…		…
1035	EXTEND (SP, 2);	1467	EXTEND (SP, 2);
1036	PUSHs (sv);	1468	PUSHs (sv);
1037	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1469	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1038	}	1470	}
1039		1471
1040	#if 0	1472	void incr_parse (CBOR *self, SV *cborstr)
		1473	ALIAS:
		1474	incr_parse_multiple = 1
		1475	PPCODE:
		1476	{
		1477	if (SvUTF8 (cborstr))
		1478	sv_utf8_downgrade (cborstr, 0);
		1479
		1480	if (!self->incr_count)
		1481	{
		1482	self->incr_count = newAV ();
		1483	self->incr_pos = 0;
		1484	self->incr_need = 1;
		1485
		1486	av_push (self->incr_count, newSViv (1));
		1487	}
		1488
		1489	do
		1490	{
		1491	if (!incr_parse (self, cborstr))
		1492	{
		1493	if (self->incr_need > self->max_size && self->max_size)
		1494	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1495	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1496
		1497	break;
		1498	}
		1499
		1500	SV *sv;
		1501	char *offset;
		1502
		1503	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1504	XPUSHs (sv);
		1505
		1506	sv_chop (cborstr, offset);
		1507
		1508	av_clear (self->incr_count);
		1509	av_push (self->incr_count, newSViv (1));
		1510
		1511	self->incr_pos = 0;
		1512	self->incr_need = self->incr_pos + 1;
		1513	}
		1514	while (ix);
		1515	}
		1516
		1517	void incr_reset (CBOR *self)
		1518	CODE:
		1519	{
		1520	SvREFCNT_dec (self->incr_count);
		1521	self->incr_count = 0;
		1522	}
1041		1523
1042	void DESTROY (CBOR *self)	1524	void DESTROY (CBOR *self)
1043	CODE:	1525	PPCODE:
1044	SvREFCNT_dec (self->cb_sk_object);	1526	cbor_free (self);
1045	SvREFCNT_dec (self->cb_object);
1046
1047	#endif
1048		1527
1049	PROTOTYPES: ENABLE	1528	PROTOTYPES: ENABLE
1050		1529
1051	void encode_cbor (SV *scalar)	1530	void encode_cbor (SV *scalar)
		1531	ALIAS:
		1532	encode_cbor = 0
		1533	encode_cbor_sharing = F_ALLOW_SHARING
1052	PPCODE:	1534	PPCODE:
1053	{	1535	{
1054	CBOR cbor;	1536	CBOR cbor;
1055	cbor_init (&cbor);	1537	cbor_init (&cbor);
		1538	cbor.flags |= ix;
1056	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1539	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1057	XPUSHs (scalar);	1540	XPUSHs (scalar);
1058	}	1541	}
1059		1542
1060	void decode_cbor (SV *cborstr)	1543	void decode_cbor (SV *cborstr)

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