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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.8 by root, Sun Oct 27 10:12:01 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"
13		14
14	// known tags, rfc7049	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	};
		65
		66	// known tags
15	enum cbor_tag	67	enum cbor_tag
16	{	68	{
		69	// extensions
		70	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
		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
		77
		78	// rfc7049
17	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	79	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
18	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	80	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
19	CBOR_TAG_POS_BIGNUM = 2, // byte string	81	CBOR_TAG_POS_BIGNUM = 2, // byte string
20	CBOR_TAG_NEG_BIGNUM = 3, // byte string	82	CBOR_TAG_NEG_BIGNUM = 3, // byte string
21	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	83	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
22	CBOR_TAG_BIGFLOAT = 5, // array	84	CBOR_TAG_BIGFLOAT = 5, // array
23		85
24	CBOR_TAG_CONV_B64U = 21, // base64url, any	86	CBOR_TAG_CONV_B64U = 21, // base64url, any
25	CBOR_TAG_CONV_B64 = 22, // base64, any	87	CBOR_TAG_CONV_B64 = 22, // base64, any
26	CBOR_TAG_CONV_HEX = 23, // base16, any	88	CBOR_TAG_CONV_HEX = 23, // base16, any
27	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	89	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
28		90
29	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	91	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
30	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	92	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
31	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	93	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
32	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	94	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
33	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	95	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
34		96
35	CBOR_TAG_MAGIC = 55799	97	CBOR_TAG_MAGIC = 55799, // self-describe cbor
36	};	98	};
37		99
38	#define F_SHRINK 0x00000200UL	100	#define F_SHRINK 0x00000001UL
39	#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
40		106
41	#define INIT_SIZE 32 // initial scalar size to be allocated	107	#define INIT_SIZE 32 // initial scalar size to be allocated
42		108
43	#define SB do {	109	#define SB do {
44	#define SE } while (0)	110	#define SE } while (0)
…		…
55	#else	121	#else
56	# define CBOR_SLOW 0	122	# define CBOR_SLOW 0
57	# define CBOR_STASH cbor_stash	123	# define CBOR_STASH cbor_stash
58	#endif	124	#endif
59		125
60	static HV *cbor_stash, *cbor_boolean_stash, *cbor_tagged_stash; // CBOR::XS::	126	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
61	static SV *cbor_true, *cbor_false;	127	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
62		128
63	typedef struct {	129	typedef struct {
64	U32 flags;	130	U32 flags;
65	U32 max_depth;	131	U32 max_depth;
66	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.
67	} CBOR;	139	} CBOR;
68		140
69	ecb_inline void	141	ecb_inline void
70	cbor_init (CBOR *cbor)	142	cbor_init (CBOR *cbor)
71	{	143	{
72	Zero (cbor, 1, CBOR);	144	Zero (cbor, 1, CBOR);
73	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);
74	}	153	}
75		154
76	/////////////////////////////////////////////////////////////////////////////	155	/////////////////////////////////////////////////////////////////////////////
77	// utility functions	156	// utility functions
78		157
…		…
100	SvPV_renew (sv, SvCUR (sv) + 1);	179	SvPV_renew (sv, SvCUR (sv) + 1);
101	#endif	180	#endif
102	}	181	}
103	}	182	}
104		183
105	/////////////////////////////////////////////////////////////////////////////	184	// minimum length of a string to be registered for stringref
106	// fp hell	185	ecb_inline int
107		186	minimum_string_length (UV idx)
108	//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	}
109		198
110	/////////////////////////////////////////////////////////////////////////////	199	/////////////////////////////////////////////////////////////////////////////
111	// encoder	200	// encoder
112		201
113	// structure used for encoding CBOR	202	// structure used for encoding CBOR
…		…
116	char *cur; // SvPVX (sv) + current output position	205	char *cur; // SvPVX (sv) + current output position
117	char *end; // SvEND (sv)	206	char *end; // SvEND (sv)
118	SV *sv; // result scalar	207	SV *sv; // result scalar
119	CBOR cbor;	208	CBOR cbor;
120	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;
121	} enc_t;	214	} enc_t;
122		215
123	ecb_inline void	216	ecb_inline void
124	need (enc_t *enc, STRLEN len)	217	need (enc_t *enc, STRLEN len)
125	{	218	{
…		…
142	static void	235	static void
143	encode_uint (enc_t *enc, int major, UV len)	236	encode_uint (enc_t *enc, int major, UV len)
144	{	237	{
145	need (enc, 9);	238	need (enc, 9);
146		239
147	if (len < 24)	240	if (ecb_expect_true (len < LENGTH_EXT1))
148	*enc->cur++ = major | len;	241	*enc->cur++ = major | len;
149	else if (len <= 0xff)	242	else if (ecb_expect_true (len <= 0xffU))
150	{	243	{
151	*enc->cur++ = major | 24;	244	*enc->cur++ = major | LENGTH_EXT1;
152	*enc->cur++ = len;	245	*enc->cur++ = len;
153	}	246	}
154	else if (len <= 0xffff)	247	else if (len <= 0xffffU)
155	{	248	{
156	*enc->cur++ = major | 25;	249	*enc->cur++ = major | LENGTH_EXT2;
157	*enc->cur++ = len >> 8;	250	*enc->cur++ = len >> 8;
158	*enc->cur++ = len;	251	*enc->cur++ = len;
159	}	252	}
160	else if (len <= 0xffffffff)	253	else if (len <= 0xffffffffU)
161	{	254	{
162	*enc->cur++ = major | 26;	255	*enc->cur++ = major | LENGTH_EXT4;
163	*enc->cur++ = len >> 24;	256	*enc->cur++ = len >> 24;
164	*enc->cur++ = len >> 16;	257	*enc->cur++ = len >> 16;
165	*enc->cur++ = len >> 8;	258	*enc->cur++ = len >> 8;
166	*enc->cur++ = len;	259	*enc->cur++ = len;
167	}	260	}
168	else	261	else
169	{	262	{
170	*enc->cur++ = major | 27;	263	*enc->cur++ = major | LENGTH_EXT8;
171	*enc->cur++ = len >> 56;	264	*enc->cur++ = len >> 56;
172	*enc->cur++ = len >> 48;	265	*enc->cur++ = len >> 48;
173	*enc->cur++ = len >> 40;	266	*enc->cur++ = len >> 40;
174	*enc->cur++ = len >> 32;	267	*enc->cur++ = len >> 32;
175	*enc->cur++ = len >> 24;	268	*enc->cur++ = len >> 24;
…		…
177	*enc->cur++ = len >> 8;	270	*enc->cur++ = len >> 8;
178	*enc->cur++ = len;	271	*enc->cur++ = len;
179	}	272	}
180	}	273	}
181		274
182	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
183	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	282	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)
184	{	283	{
185	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	284	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
186	need (enc, len);	285	need (enc, len);
187	memcpy (enc->cur, str, len);	286	memcpy (enc->cur, str, len);
188	enc->cur += len;	287	enc->cur += len;
189	}	288	}
190		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
191	static void encode_sv (enc_t *enc, SV *sv);	315	static void encode_sv (enc_t *enc, SV *sv);
192		316
193	static void	317	static void
194	encode_av (enc_t *enc, AV *av)	318	encode_av (enc_t *enc, AV *av)
195	{	319	{
…		…
198	if (enc->depth >= enc->cbor.max_depth)	322	if (enc->depth >= enc->cbor.max_depth)
199	croak (ERR_NESTING_EXCEEDED);	323	croak (ERR_NESTING_EXCEEDED);
200		324
201	++enc->depth;	325	++enc->depth;
202		326
203	encode_uint (enc, 0x80, len + 1);	327	encode_uint (enc, MAJOR_ARRAY, len + 1);
204		328
		329	if (SvMAGICAL (av))
205	for (i = 0; i <= len; ++i)	330	for (i = 0; i <= len; ++i)
206	{	331	{
207	SV **svp = av_fetch (av, i, 0);	332	SV **svp = av_fetch (av, i, 0);
208	encode_sv (enc, svp ? *svp : &PL_sv_undef);	333	encode_sv (enc, svp ? *svp : &PL_sv_undef);
209	}	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	}
210		341
211	--enc->depth;	342	--enc->depth;
212	}	343	}
213		344
214	static void	345	static void
…		…
223		354
224	int pairs = hv_iterinit (hv);	355	int pairs = hv_iterinit (hv);
225	int mg = SvMAGICAL (hv);	356	int mg = SvMAGICAL (hv);
226		357
227	if (mg)	358	if (mg)
228	encode_ch (enc, 0xa0 | 31);	359	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
229	else	360	else
230	encode_uint (enc, 0xa0, pairs);	361	encode_uint (enc, MAJOR_MAP, pairs);
231		362
232	while ((he = hv_iternext (hv)))	363	while ((he = hv_iternext (hv)))
233	{	364	{
234	if (HeKLEN (he) == HEf_SVKEY)	365	if (HeKLEN (he) == HEf_SVKEY)
235	encode_sv (enc, HeSVKEY (he));	366	encode_sv (enc, HeSVKEY (he));
236	else	367	else
237	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	368	encode_strref (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));
238		369
239	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));
240	}	371	}
241		372
242	if (mg)	373	if (mg)
243	encode_ch (enc, 0xe0 | 31);	374	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
244		375
245	--enc->depth;	376	--enc->depth;
246	}	377	}
247		378
248	// encode objects, arrays and special \0=false and \1=true values.	379	// encode objects, arrays and special \0=false and \1=true values.
249	static void	380	static void
250	encode_rv (enc_t *enc, SV *sv)	381	encode_rv (enc_t *enc, SV *sv)
251	{	382	{
252	svtype svt;
253
254	SvGETMAGIC (sv);	383	SvGETMAGIC (sv);
		384
255	svt = SvTYPE (sv);	385	svtype svt = SvTYPE (sv);
256		386
257	if (ecb_expect_false (SvOBJECT (sv)))	387	if (ecb_expect_false (SvOBJECT (sv)))
258	{	388	{
259	HV *boolean_stash = !CBOR_SLOW || cbor_boolean_stash	389	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
260	? cbor_boolean_stash	390	? types_boolean_stash
261	: gv_stashpv ("CBOR::XS::Boolean", 1);	391	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		392	HV *error_stash = !CBOR_SLOW || types_error_stash
		393	? types_error_stash
		394	: gv_stashpv ("Types::Serialiser::Error", 1);
262	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	395	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
263	? cbor_tagged_stash	396	? cbor_tagged_stash
264	: gv_stashpv ("CBOR::XS::Tagged" , 1);	397	: gv_stashpv ("CBOR::XS::Tagged" , 1);
265		398
		399	HV *stash = SvSTASH (sv);
		400
266	if (SvSTASH (sv) == boolean_stash)	401	if (stash == boolean_stash)
267	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	}
		406	else if (stash == error_stash)
		407	{
		408	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		409	return;
		410	}
268	else if (SvSTASH (sv) == tagged_stash)	411	else if (stash == tagged_stash)
269	{	412	{
270	if (svt != SVt_PVAV)	413	if (svt != SVt_PVAV)
271	croak ("encountered CBOR::XS::Tagged object that isn't an array");	414	croak ("encountered CBOR::XS::Tagged object that isn't an array");
272		415
273	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	416	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
274	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))
		432	{
		433	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		434	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		435	return;
275	}	436	}
276	else	437	else
277	{	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
		450	if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
		451	{
		452	dSP;
		453
		454	ENTER; SAVETMPS;
		455	PUSHMARK (SP);
278	// 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
279	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
280
281	if (to_cbor)
282	{
283	dSP;
284
285	ENTER; SAVETMPS; PUSHMARK (SP);
286	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	457	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
287		458
288	// calling with G_SCALAR ensures that we always get a 1 return value
289	PUTBACK;	459	PUTBACK;
		460	// G_SCALAR ensures that return value is 1
290	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	461	call_sv ((SV *)GvCV (method), G_SCALAR);
291	SPAGAIN;	462	SPAGAIN;
292		463
293	// catch this surprisingly common error	464	// catch this surprisingly common error
294	if (SvROK (TOPs) && SvRV (TOPs) == sv)	465	if (SvROK (TOPs) && SvRV (TOPs) == sv)
295	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	466	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
296		467
297	sv = POPs;	468	encode_sv (enc, POPs);
		469
298	PUTBACK;	470	PUTBACK;
299		471
300	encode_sv (enc, sv);
301
302	FREETMPS; LEAVE;	472	FREETMPS; LEAVE;
303	}	473	}
		474	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
		475	{
		476	dSP;
		477
		478	ENTER; SAVETMPS;
		479	SAVESTACK_POS ();
		480	PUSHMARK (SP);
		481	EXTEND (SP, 2);
		482	// we re-bless the reference to get overload and other niceties right
		483	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		484	PUSHs (sv_cbor);
		485
		486	PUTBACK;
		487	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		488	SPAGAIN;
		489
		490	// catch this surprisingly common error
		491	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		492	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		493
		494	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		495	encode_uint (enc, MAJOR_ARRAY, count + 1);
		496	encode_strref (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		497
		498	while (count)
		499	encode_sv (enc, SP[1 - count--]);
		500
		501	PUTBACK;
		502
		503	FREETMPS; LEAVE;
		504	}
304	else	505	else
305	croak ("encountered object '%s', but no TO_CBOR method available on it",	506	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
306	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	507	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
307	}
308	}	508	}
309	else if (svt == SVt_PVHV)	509	else if (svt == SVt_PVHV)
310	encode_hv (enc, (HV *)sv);	510	encode_hv (enc, (HV *)sv);
311	else if (svt == SVt_PVAV)	511	else if (svt == SVt_PVAV)
312	encode_av (enc, (AV *)sv);	512	encode_av (enc, (AV *)sv);
313	else if (svt < SVt_PVAV)
314	{
315	STRLEN len = 0;
316	char *pv = svt ? SvPV (sv, len) : 0;
317
318	if (len == 1 && *pv == '1')
319	encode_ch (enc, 0xe0 | 21);
320	else if (len == 1 && *pv == '0')
321	encode_ch (enc, 0xe0 | 20);
322	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
323	encode_ch (enc, 0xe0 | 23);
324	else
325	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
326	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
327	}
328	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
329	encode_ch (enc, 0xe0 | 23);
330	else	513	else
331	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	514	{
332	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	515	encode_tag (enc, CBOR_TAG_INDIRECTION);
		516	encode_sv (enc, sv);
		517	}
333	}	518	}
334		519
335	static void	520	static void
336	encode_nv (enc_t *enc, SV *sv)	521	encode_nv (enc_t *enc, SV *sv)
337	{	522	{
338	double nv = SvNVX (sv);	523	double nv = SvNVX (sv);
339		524
340	need (enc, 9);	525	need (enc, 9);
341		526
342	if (ecb_expect_false (nv == (U32)nv))	527	if (ecb_expect_false (nv == (NV)(U32)nv))
343	encode_uint (enc, 0x00, (U32)nv);	528	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
344	//TODO: maybe I32?	529	//TODO: maybe I32?
345	else if (ecb_expect_false (nv == (float)nv))	530	else if (ecb_expect_false (nv == (float)nv))
346	{	531	{
347	uint32_t fp = ecb_float_to_binary32 (nv);	532	uint32_t fp = ecb_float_to_binary32 (nv);
348		533
349	*enc->cur++ = 0xe0 | 26;	534	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
350		535
351	if (!ecb_big_endian ())	536	if (!ecb_big_endian ())
352	fp = ecb_bswap32 (fp);	537	fp = ecb_bswap32 (fp);
353		538
354	memcpy (enc->cur, &fp, 4);	539	memcpy (enc->cur, &fp, 4);
…		…
356	}	541	}
357	else	542	else
358	{	543	{
359	uint64_t fp = ecb_double_to_binary64 (nv);	544	uint64_t fp = ecb_double_to_binary64 (nv);
360		545
361	*enc->cur++ = 0xe0 | 27;	546	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
362		547
363	if (!ecb_big_endian ())	548	if (!ecb_big_endian ())
364	fp = ecb_bswap64 (fp);	549	fp = ecb_bswap64 (fp);
365		550
366	memcpy (enc->cur, &fp, 8);	551	memcpy (enc->cur, &fp, 8);
…		…
375		560
376	if (SvPOKp (sv))	561	if (SvPOKp (sv))
377	{	562	{
378	STRLEN len;	563	STRLEN len;
379	char *str = SvPV (sv, len);	564	char *str = SvPV (sv, len);
380	encode_str (enc, SvUTF8 (sv), str, len);	565	encode_strref (enc, SvUTF8 (sv), str, len);
381	}	566	}
382	else if (SvNOKp (sv))	567	else if (SvNOKp (sv))
383	encode_nv (enc, sv);	568	encode_nv (enc, sv);
384	else if (SvIOKp (sv))	569	else if (SvIOKp (sv))
385	{	570	{
386	if (SvIsUV (sv))	571	if (SvIsUV (sv))
387	encode_uint (enc, 0x00, SvUVX (sv));	572	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
388	else if (SvIVX (sv) >= 0)	573	else if (SvIVX (sv) >= 0)
389	encode_uint (enc, 0x00, SvIVX (sv));	574	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
390	else	575	else
391	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	576	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
392	}	577	}
393	else if (SvROK (sv))	578	else if (SvROK (sv))
394	encode_rv (enc, SvRV (sv));	579	encode_rv (enc, SvRV (sv));
395	else if (!SvOK (sv))	580	else if (!SvOK (sv))
396	encode_ch (enc, 0xe0 | 22);	581	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
397	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	582	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
398	encode_ch (enc, 0xe0 | 23);	583	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
399	else	584	else
400	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",
401	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	586	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
402	}	587	}
403		588
404	static SV *	589	static SV *
405	encode_cbor (SV *scalar, CBOR *cbor)	590	encode_cbor (SV *scalar, CBOR *cbor)
406	{	591	{
407	enc_t enc;	592	enc_t enc = { 0 };
408		593
409	enc.cbor = *cbor;	594	enc.cbor = *cbor;
410	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	595	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
411	enc.cur = SvPVX (enc.sv);	596	enc.cur = SvPVX (enc.sv);
412	enc.end = SvEND (enc.sv);	597	enc.end = SvEND (enc.sv);
413	enc.depth = 0;
414		598
415	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
416	encode_sv (&enc, scalar);	608	encode_sv (&enc, scalar);
417		609
418	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	610	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
419	*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
420		612
…		…
434	U8 *end; // end of input string	626	U8 *end; // end of input string
435	const char *err; // parse error, if != 0	627	const char *err; // parse error, if != 0
436	CBOR cbor;	628	CBOR cbor;
437	U32 depth; // recursion depth	629	U32 depth; // recursion depth
438	U32 maxdepth; // recursion depth limit	630	U32 maxdepth; // recursion depth limit
		631	AV *shareable;
		632	AV *stringref;
		633	SV *decode_tagged;
439	} dec_t;	634	} dec_t;
440		635
441	#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
442		637
443	#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")
…		…
446	#define DEC_DEC_DEPTH --dec->depth	641	#define DEC_DEC_DEPTH --dec->depth
447		642
448	static UV	643	static UV
449	decode_uint (dec_t *dec)	644	decode_uint (dec_t *dec)
450	{	645	{
451	switch (*dec->cur & 31)	646	U8 m = *dec->cur & MINOR_MASK;
452	{	647	++dec->cur;
453	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
454	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
455	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
456	return *dec->cur++ & 31;
457		648
458	case 24:	649	if (ecb_expect_true (m < LENGTH_EXT1))
		650	return m;
		651	else if (ecb_expect_true (m == LENGTH_EXT1))
		652	{
459	WANT (2);	653	WANT (1);
460	dec->cur += 2;	654	dec->cur += 1;
461	return dec->cur[-1];	655	return dec->cur[-1];
462		656	}
463	case 25:	657	else if (ecb_expect_true (m == LENGTH_EXT2))
		658	{
464	WANT (3);	659	WANT (2);
465	dec->cur += 3;	660	dec->cur += 2;
466	return (((UV)dec->cur[-2]) << 8)	661	return (((UV)dec->cur[-2]) << 8)
467	| ((UV)dec->cur[-1]);	662	| ((UV)dec->cur[-1]);
468		663	}
469	case 26:	664	else if (ecb_expect_true (m == LENGTH_EXT4))
		665	{
470	WANT (5);	666	WANT (4);
471	dec->cur += 5;	667	dec->cur += 4;
472	return (((UV)dec->cur[-4]) << 24)	668	return (((UV)dec->cur[-4]) << 24)
473	| (((UV)dec->cur[-3]) << 16)	669	| (((UV)dec->cur[-3]) << 16)
474	| (((UV)dec->cur[-2]) << 8)	670	| (((UV)dec->cur[-2]) << 8)
475	| ((UV)dec->cur[-1]);	671	| ((UV)dec->cur[-1]);
476		672	}
477	case 27:	673	else if (ecb_expect_true (m == LENGTH_EXT8))
		674	{
478	WANT (9);	675	WANT (8);
479	dec->cur += 9;	676	dec->cur += 8;
		677
		678	return
		679	#if UVSIZE < 8
		680	0
		681	#else
480	return (((UV)dec->cur[-8]) << 56)	682	(((UV)dec->cur[-8]) << 56)
481	| (((UV)dec->cur[-7]) << 48)	683	| (((UV)dec->cur[-7]) << 48)
482	| (((UV)dec->cur[-6]) << 40)	684	| (((UV)dec->cur[-6]) << 40)
483	| (((UV)dec->cur[-5]) << 32)	685	| (((UV)dec->cur[-5]) << 32)
		686	#endif
484	| (((UV)dec->cur[-4]) << 24)	687	| (((UV)dec->cur[-4]) << 24)
485	| (((UV)dec->cur[-3]) << 16)	688	| (((UV)dec->cur[-3]) << 16)
486	| (((UV)dec->cur[-2]) << 8)	689	| (((UV)dec->cur[-2]) << 8)
487	| ((UV)dec->cur[-1]);	690	| ((UV)dec->cur[-1]);
488		691	}
489	default:	692	else
490	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	693	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
491	}
492		694
493	fail:	695	fail:
494	return 0;	696	return 0;
495	}	697	}
496		698
…		…
501	{	703	{
502	AV *av = newAV ();	704	AV *av = newAV ();
503		705
504	DEC_INC_DEPTH;	706	DEC_INC_DEPTH;
505		707
506	if ((*dec->cur & 31) == 31)	708	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
507	{	709	{
508	++dec->cur;	710	++dec->cur;
509		711
510	for (;;)	712	for (;;)
511	{	713	{
512	WANT (1);	714	WANT (1);
513		715
514	if (*dec->cur == (0xe0 | 31))	716	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
515	{	717	{
516	++dec->cur;	718	++dec->cur;
517	break;	719	break;
518	}	720	}
519		721
…		…
522	}	724	}
523	else	725	else
524	{	726	{
525	int i, len = decode_uint (dec);	727	int i, len = decode_uint (dec);
526		728
		729	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
527	av_fill (av, len - 1);	730	av_fill (av, len - 1);
528		731
529	for (i = 0; i < len; ++i)	732	for (i = 0; i < len; ++i)
530	AvARRAY (av)[i] = decode_sv (dec);	733	AvARRAY (av)[i] = decode_sv (dec);
531	}	734	}
…		…
537	SvREFCNT_dec (av);	740	SvREFCNT_dec (av);
538	DEC_DEC_DEPTH;	741	DEC_DEC_DEPTH;
539	return &PL_sv_undef;	742	return &PL_sv_undef;
540	}	743	}
541		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
542	static SV *	791	static SV *
543	decode_hv (dec_t *dec)	792	decode_hv (dec_t *dec)
544	{	793	{
545	HV *hv = newHV ();	794	HV *hv = newHV ();
546		795
547	DEC_INC_DEPTH;	796	DEC_INC_DEPTH;
548		797
549	if ((*dec->cur & 31) == 31)	798	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
550	{	799	{
551	++dec->cur;	800	++dec->cur;
552		801
553	for (;;)	802	for (;;)
554	{	803	{
555	WANT (1);	804	WANT (1);
556		805
557	if (*dec->cur == (0xe0 | 31))	806	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
558	{	807	{
559	++dec->cur;	808	++dec->cur;
560	break;	809	break;
561	}	810	}
562		811
563	SV *k = decode_sv (dec);	812	decode_he (dec, hv);
564	SV *v = decode_sv (dec);
565
566	hv_store_ent (hv, k, v, 0);
567	}	813	}
568	}	814	}
569	else	815	else
570	{	816	{
571	int len = decode_uint (dec);	817	int pairs = decode_uint (dec);
572		818
573	while (len--)	819	while (pairs--)
574	{	820	decode_he (dec, hv);
575	SV *k = decode_sv (dec);
576	SV *v = decode_sv (dec);
577
578	hv_store_ent (hv, k, v, 0);
579	}
580	}	821	}
581		822
582	DEC_DEC_DEPTH;	823	DEC_DEC_DEPTH;
583	return newRV_noinc ((SV *)hv);	824	return newRV_noinc ((SV *)hv);
584		825
…		…
591	static SV *	832	static SV *
592	decode_str (dec_t *dec, int utf8)	833	decode_str (dec_t *dec, int utf8)
593	{	834	{
594	SV *sv = 0;	835	SV *sv = 0;
595		836
596	if ((*dec->cur & 31) == 31)	837	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
597	{	838	{
		839	// indefinite length strings
598	++dec->cur;	840	++dec->cur;
599		841
		842	U8 major = *dec->cur & MAJOR_MISC;
		843
600	sv = newSVpvn ("", 0);	844	sv = newSVpvn ("", 0);
601		845
602	// not very fast, and certainly not robust against illegal input
603	for (;;)	846	for (;;)
604	{	847	{
605	WANT (1);	848	WANT (1);
606		849
607	if (*dec->cur == (0xe0 | 31))	850	if ((*dec->cur - major) > LENGTH_EXT8)
		851	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
608	{	852	{
609	++dec->cur;	853	++dec->cur;
610	break;	854	break;
611	}	855	}
		856	else
		857	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
612		858
613	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;
614	}	864	}
615	}	865	}
616	else	866	else
617	{	867	{
618	STRLEN len = decode_uint (dec);	868	STRLEN len = decode_uint (dec);
619		869
620	WANT (len);	870	WANT (len);
621	sv = newSVpvn (dec->cur, len);	871	sv = newSVpvn (dec->cur, len);
622	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));
623	}	877	}
624		878
625	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
626	SvUTF8_on (sv);	885	SvUTF8_on (sv);
		886	}
627		887
628	return sv;	888	return sv;
629		889
630	fail:	890	fail:
631	SvREFCNT_dec (sv);	891	SvREFCNT_dec (sv);
…		…
633	}	893	}
634		894
635	static SV *	895	static SV *
636	decode_tagged (dec_t *dec)	896	decode_tagged (dec_t *dec)
637	{	897	{
		898	SV *sv = 0;
638	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:
639	SV *sv = decode_sv (dec);	906	sv = decode_sv (dec);
		907	break;
640		908
641	if (tag == CBOR_TAG_MAGIC) // 2.4.5 Self-Describe CBOR	909	case CBOR_TAG_INDIRECTION:
		910	sv = newRV_noinc (decode_sv (dec));
		911	break;
		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
		985	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		986	ERR ("corrupted CBOR data (non-array perl object)");
		987
		988	AV *av = (AV *)SvRV (sv);
		989	int len = av_len (av) + 1;
		990	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		991
		992	if (!stash)
		993	ERR ("cannot decode perl-object (package does not exist)");
		994
		995	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		996
		997	if (!method)
		998	ERR ("cannot decode perl-object (package does not have a THAW method)");
		999
		1000	dSP;
		1001
		1002	ENTER; SAVETMPS;
		1003	PUSHMARK (SP);
		1004	EXTEND (SP, len + 1);
		1005	// we re-bless the reference to get overload and other niceties right
		1006	PUSHs (*av_fetch (av, 0, 1));
		1007	PUSHs (sv_cbor);
		1008
		1009	int i;
		1010
		1011	for (i = 1; i < len; ++i)
		1012	PUSHs (*av_fetch (av, i, 1));
		1013
		1014	PUTBACK;
		1015	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1016	SPAGAIN;
		1017
		1018	if (SvTRUE (ERRSV))
		1019	{
		1020	FREETMPS; LEAVE;
		1021	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1022	}
		1023
		1024	SvREFCNT_dec (sv);
		1025	sv = SvREFCNT_inc (POPs);
		1026
		1027	PUTBACK;
		1028
		1029	FREETMPS; LEAVE;
		1030	}
		1031	break;
		1032
		1033	default:
		1034	{
		1035	sv = decode_sv (dec);
		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	{
		1062	AV *av = newAV ();
		1063	av_push (av, newSVuv (tag));
		1064	av_push (av, sv);
		1065
		1066	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1067	? cbor_tagged_stash
		1068	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1069	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1070	}
		1071
		1072	PUTBACK;
		1073
		1074	FREETMPS; LEAVE;
		1075	}
		1076	break;
		1077	}
		1078
642	return sv;	1079	return sv;
643		1080
644	AV *av = newAV ();	1081	fail:
645	av_push (av, newSVuv (tag));	1082	SvREFCNT_dec (sv);
646	av_push (av, sv);	1083	return &PL_sv_undef;
647
648	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
649	? cbor_tagged_stash
650	: gv_stashpv ("CBOR::XS::Tagged" , 1);
651
652	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);
653	}	1084	}
654		1085
655	static SV *	1086	static SV *
656	decode_sv (dec_t *dec)	1087	decode_sv (dec_t *dec)
657	{	1088	{
658	WANT (1);	1089	WANT (1);
659		1090
660	switch (*dec->cur >> 5)	1091	switch (*dec->cur >> MAJOR_SHIFT)
661	{	1092	{
662	case 0: // unsigned int	1093	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
663	return newSVuv (decode_uint (dec));	1094	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
664	case 1: // negative int	1095	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
665	return newSViv (-1 - (IV)decode_uint (dec));	1096	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
666	case 2: // octet string	1097	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
667	return decode_str (dec, 0);	1098	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
668	case 3: // utf-8 string	1099	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
669	return decode_str (dec, 1);	1100
670	case 4: // array	1101	case MAJOR_MISC >> MAJOR_SHIFT:
671	return decode_av (dec);
672	case 5: // map
673	return decode_hv (dec);
674	case 6: // tag
675	return decode_tagged (dec);
676	case 7: // misc
677	switch (*dec->cur++ & 31)	1102	switch (*dec->cur++ & MINOR_MASK)
678	{	1103	{
679	case 20:	1104	case SIMPLE_FALSE:
680	#if CBOR_SLOW	1105	#if CBOR_SLOW
681	cbor_false = get_bool ("CBOR::XS::false");	1106	types_false = get_bool ("Types::Serialiser::false");
682	#endif	1107	#endif
683	return newSVsv (cbor_false);	1108	return newSVsv (types_false);
684	case 21:	1109	case SIMPLE_TRUE:
685	#if CBOR_SLOW	1110	#if CBOR_SLOW
686	cbor_true = get_bool ("CBOR::XS::true");	1111	types_true = get_bool ("Types::Serialiser::true");
687	#endif	1112	#endif
688	return newSVsv (cbor_true);	1113	return newSVsv (types_true);
689	case 22:	1114	case SIMPLE_NULL:
690	return newSVsv (&PL_sv_undef);	1115	return newSVsv (&PL_sv_undef);
		1116	case SIMPLE_UNDEF:
		1117	#if CBOR_SLOW
		1118	types_error = get_bool ("Types::Serialiser::error");
		1119	#endif
		1120	return newSVsv (types_error);
691		1121
692	case 25:	1122	case MISC_FLOAT16:
693	{	1123	{
694	WANT (2);	1124	WANT (2);
695		1125
696	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1126	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
697	dec->cur += 2;	1127	dec->cur += 2;
698		1128
699	return newSVnv (ecb_binary16_to_float (fp));	1129	return newSVnv (ecb_binary16_to_float (fp));
700	}	1130	}
701		1131
702	case 26:	1132	case MISC_FLOAT32:
703	{	1133	{
704	uint32_t fp;	1134	uint32_t fp;
705	WANT (4);	1135	WANT (4);
706	memcpy (&fp, dec->cur, 4);	1136	memcpy (&fp, dec->cur, 4);
707	dec->cur += 4;	1137	dec->cur += 4;
…		…
710	fp = ecb_bswap32 (fp);	1140	fp = ecb_bswap32 (fp);
711		1141
712	return newSVnv (ecb_binary32_to_float (fp));	1142	return newSVnv (ecb_binary32_to_float (fp));
713	}	1143	}
714		1144
715	case 27:	1145	case MISC_FLOAT64:
716	{	1146	{
717	uint64_t fp;	1147	uint64_t fp;
718	WANT (8);	1148	WANT (8);
719	memcpy (&fp, dec->cur, 8);	1149	memcpy (&fp, dec->cur, 8);
720	dec->cur += 8;	1150	dec->cur += 8;
…		…
723	fp = ecb_bswap64 (fp);	1153	fp = ecb_bswap64 (fp);
724		1154
725	return newSVnv (ecb_binary64_to_double (fp));	1155	return newSVnv (ecb_binary64_to_double (fp));
726	}	1156	}
727		1157
728	// 0..19 unassigned	1158	// 0..19 unassigned simple
729	// 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
730	default:	1162	default:
731	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1163	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
732	}	1164	}
733		1165
734	break;	1166	break;
735	}	1167	}
736		1168
…		…
739	}	1171	}
740		1172
741	static SV *	1173	static SV *
742	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1174	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
743	{	1175	{
744	dec_t dec;	1176	dec_t dec = { 0 };
745	SV *sv;	1177	SV *sv;
		1178	STRLEN len;
		1179	char *data = SvPVbyte (string, len);
746		1180
747	/* work around bugs in 5.10 where manipulating magic values
748	* makes perl ignore the magic in subsequent accesses.
749	* also make a copy of non-PV values, to get them into a clean
750	* state (SvPV should do that, but it's buggy, see below).
751	*/
752	/*SvGETMAGIC (string);*/
753	if (SvMAGICAL (string) || !SvPOK (string))
754	string = sv_2mortal (newSVsv (string));
755
756	SvUPGRADE (string, SVt_PV);
757
758	/* work around a bug in perl 5.10, which causes SvCUR to fail an
759	* assertion with -DDEBUGGING, although SvCUR is documented to
760	* return the xpv_cur field which certainly exists after upgrading.
761	* according to nicholas clark, calling SvPOK fixes this.
762	* But it doesn't fix it, so try another workaround, call SvPV_nolen
763	* and hope for the best.
764	* Damnit, SvPV_nolen still trips over yet another assertion. This
765	* assertion business is seriously broken, try yet another workaround
766	* for the broken -DDEBUGGING.
767	*/
768	{
769	#ifdef DEBUGGING
770	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
771	#else
772	STRLEN offset = SvCUR (string);
773	#endif
774
775	if (offset > cbor->max_size && cbor->max_size)	1181	if (len > cbor->max_size && cbor->max_size)
776	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",
777	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1183	(unsigned long)len, (unsigned long)cbor->max_size);
778	}
779
780	sv_utf8_downgrade (string, 0);
781		1184
782	dec.cbor = *cbor;	1185	dec.cbor = *cbor;
783	dec.cur = (U8 *)SvPVX (string);	1186	dec.cur = (U8 *)data;
784	dec.end = (U8 *)SvEND (string);	1187	dec.end = (U8 *)data + len;
785	dec.err = 0;
786	dec.depth = 0;
787		1188
788	sv = decode_sv (&dec);	1189	sv = decode_sv (&dec);
789		1190
790	if (offset_return)	1191	if (offset_return)
791	*offset_return = dec.cur;	1192	*offset_return = dec.cur;
…		…
794	if (dec.cur != dec.end && !dec.err)	1195	if (dec.cur != dec.end && !dec.err)
795	dec.err = "garbage after CBOR object";	1196	dec.err = "garbage after CBOR object";
796		1197
797	if (dec.err)	1198	if (dec.err)
798	{	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
799	SvREFCNT_dec (sv);	1211	SvREFCNT_dec (sv);
800	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);
801	}	1213	}
802		1214
803	sv = sv_2mortal (sv);	1215	sv = sv_2mortal (sv);
804		1216
805	return sv;	1217	return sv;
806	}	1218	}
807		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
808	/////////////////////////////////////////////////////////////////////////////	1344	/////////////////////////////////////////////////////////////////////////////
809	// XS interface functions	1345	// XS interface functions
810		1346
811	MODULE = CBOR::XS PACKAGE = CBOR::XS	1347	MODULE = CBOR::XS PACKAGE = CBOR::XS
812		1348
813	BOOT:	1349	BOOT:
814	{	1350	{
815	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1351	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
816	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);
817	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);	1352	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
818		1353
819	cbor_true = get_bool ("CBOR::XS::true");	1354	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
820	cbor_false = get_bool ("CBOR::XS::false");	1355	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1356
		1357	types_true = get_bool ("Types::Serialiser::true" );
		1358	types_false = get_bool ("Types::Serialiser::false");
		1359	types_error = get_bool ("Types::Serialiser::error");
		1360
		1361	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1362
		1363	sv_cbor = newSVpv ("CBOR", 0);
		1364	SvREADONLY_on (sv_cbor);
821	}	1365	}
822		1366
823	PROTOTYPES: DISABLE	1367	PROTOTYPES: DISABLE
824		1368
825	void CLONE (...)	1369	void CLONE (...)
826	CODE:	1370	CODE:
827	cbor_stash = 0;	1371	cbor_stash = 0;
828	cbor_boolean_stash = 0;
829	cbor_tagged_stash = 0;	1372	cbor_tagged_stash = 0;
		1373	types_error_stash = 0;
		1374	types_boolean_stash = 0;
830		1375
831	void new (char *klass)	1376	void new (char *klass)
832	PPCODE:	1377	PPCODE:
833	{	1378	{
834	SV *pv = NEWSV (0, sizeof (CBOR));	1379	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
842		1387
843	void shrink (CBOR *self, int enable = 1)	1388	void shrink (CBOR *self, int enable = 1)
844	ALIAS:	1389	ALIAS:
845	shrink = F_SHRINK	1390	shrink = F_SHRINK
846	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
847	PPCODE:	1396	PPCODE:
848	{	1397	{
849	if (enable)	1398	if (enable)
850	self->flags |= ix;	1399	self->flags |= ix;
851	else	1400	else
…		…
856		1405
857	void get_shrink (CBOR *self)	1406	void get_shrink (CBOR *self)
858	ALIAS:	1407	ALIAS:
859	get_shrink = F_SHRINK	1408	get_shrink = F_SHRINK
860	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
861	PPCODE:	1414	PPCODE:
862	XPUSHs (boolSV (self->flags & ix));	1415	XPUSHs (boolSV (self->flags & ix));
863		1416
864	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1417	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
865	PPCODE:	1418	PPCODE:
…		…
881	CODE:	1434	CODE:
882	RETVAL = self->max_size;	1435	RETVAL = self->max_size;
883	OUTPUT:	1436	OUTPUT:
884	RETVAL	1437	RETVAL
885		1438
886	#if 0 //TODO	1439	void filter (CBOR *self, SV *filter = 0)
887
888	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
889	PPCODE:	1440	PPCODE:
890	{
891	SvREFCNT_dec (self->cb_object);	1441	SvREFCNT_dec (self->filter);
892	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1442	self->filter = filter ? newSVsv (filter) : filter;
893
894	XPUSHs (ST (0));	1443	XPUSHs (ST (0));
895	}
896		1444
897	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1445	SV *get_filter (CBOR *self)
898	PPCODE:	1446	CODE:
899	{	1447	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
900	if (!self->cb_sk_object)	1448	OUTPUT:
901	self->cb_sk_object = newHV ();	1449	RETVAL
902
903	if (SvOK (cb))
904	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
905	else
906	{
907	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
908
909	if (!HvKEYS (self->cb_sk_object))
910	{
911	SvREFCNT_dec (self->cb_sk_object);
912	self->cb_sk_object = 0;
913	}
914	}
915
916	XPUSHs (ST (0));
917	}
918
919	#endif
920		1450
921	void encode (CBOR *self, SV *scalar)	1451	void encode (CBOR *self, SV *scalar)
922	PPCODE:	1452	PPCODE:
923	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1453	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
924	XPUSHs (scalar);	1454	XPUSHs (scalar);
…		…
937	EXTEND (SP, 2);	1467	EXTEND (SP, 2);
938	PUSHs (sv);	1468	PUSHs (sv);
939	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1469	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
940	}	1470	}
941		1471
942	#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	}
943		1523
944	void DESTROY (CBOR *self)	1524	void DESTROY (CBOR *self)
945	CODE:	1525	PPCODE:
946	SvREFCNT_dec (self->cb_sk_object);	1526	cbor_free (self);
947	SvREFCNT_dec (self->cb_object);
948
949	#endif
950		1527
951	PROTOTYPES: ENABLE	1528	PROTOTYPES: ENABLE
952		1529
953	void encode_cbor (SV *scalar)	1530	void encode_cbor (SV *scalar)
		1531	ALIAS:
		1532	encode_cbor = 0
		1533	encode_cbor_sharing = F_ALLOW_SHARING
954	PPCODE:	1534	PPCODE:
955	{	1535	{
956	CBOR cbor;	1536	CBOR cbor;
957	cbor_init (&cbor);	1537	cbor_init (&cbor);
		1538	cbor.flags |= ix;
958	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1539	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
959	XPUSHs (scalar);	1540	XPUSHs (scalar);
960	}	1541	}
961		1542
962	void decode_cbor (SV *cborstr)	1543	void decode_cbor (SV *cborstr)

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