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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.9 by root, Sun Oct 27 10:17:12 2013 UTC vs.
Revision 1.48 by root, Sun Sep 20 23:25:53 2015 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)
…		…
60	#else	121	#else
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, *cbor_boolean_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 *cbor_true, *cbor_false;	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 || cbor_boolean_stash	389	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
265	? cbor_boolean_stash	390	? types_boolean_stash
266	: 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);
267	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	395	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
268	? cbor_tagged_stash	396	? cbor_tagged_stash
269	: gv_stashpv ("CBOR::XS::Tagged" , 1);	397	: gv_stashpv ("CBOR::XS::Tagged" , 1);
270		398
		399	HV *stash = SvSTASH (sv);
		400
271	if (SvSTASH (sv) == boolean_stash)	401	if (stash == boolean_stash)
272	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	}
273	else if (SvSTASH (sv) == tagged_stash)	411	else if (stash == tagged_stash)
274	{	412	{
275	if (svt != SVt_PVAV)	413	if (svt != SVt_PVAV)
276	croak ("encountered CBOR::XS::Tagged object that isn't an array");	414	croak ("encountered CBOR::XS::Tagged object that isn't an array");
277		415
278	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	416	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
279	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;
280	}	436	}
281	else	437	else
282	{	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; PUSHMARK (SP);
283	// we re-bless the reference to get overload and other niceties right	455	// we re-bless the reference to get overload and other niceties right
284	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
285
286	if (to_cbor)
287	{
288	dSP;
289
290	ENTER; SAVETMPS; PUSHMARK (SP);
291	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	456	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
292		457
293	// calling with G_SCALAR ensures that we always get a 1 return value
294	PUTBACK;	458	PUTBACK;
		459	// G_SCALAR ensures that return value is 1
295	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	460	call_sv ((SV *)GvCV (method), G_SCALAR);
296	SPAGAIN;	461	SPAGAIN;
297		462
298	// catch this surprisingly common error	463	// catch this surprisingly common error
299	if (SvROK (TOPs) && SvRV (TOPs) == sv)	464	if (SvROK (TOPs) && SvRV (TOPs) == sv)
300	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	465	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
301		466
302	sv = POPs;	467	encode_sv (enc, POPs);
		468
303	PUTBACK;	469	PUTBACK;
304		470
305	encode_sv (enc, sv);
306
307	FREETMPS; LEAVE;	471	FREETMPS; LEAVE;
308	}	472	}
		473	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
		474	{
		475	dSP;
		476
		477	ENTER; SAVETMPS; PUSHMARK (SP);
		478	EXTEND (SP, 2);
		479	// we re-bless the reference to get overload and other niceties right
		480	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		481	PUSHs (sv_cbor);
		482
		483	PUTBACK;
		484	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		485	SPAGAIN;
		486
		487	// catch this surprisingly common error
		488	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		489	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		490
		491	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		492	encode_uint (enc, MAJOR_ARRAY, count + 1);
		493	encode_strref (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		494
		495	while (count)
		496	encode_sv (enc, SP[1 - count--]);
		497
		498	PUTBACK;
		499
		500	FREETMPS; LEAVE;
		501	}
309	else	502	else
310	croak ("encountered object '%s', but no TO_CBOR method available on it",	503	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
311	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	504	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
312	}
313	}	505	}
314	else if (svt == SVt_PVHV)	506	else if (svt == SVt_PVHV)
315	encode_hv (enc, (HV *)sv);	507	encode_hv (enc, (HV *)sv);
316	else if (svt == SVt_PVAV)	508	else if (svt == SVt_PVAV)
317	encode_av (enc, (AV *)sv);	509	encode_av (enc, (AV *)sv);
318	else if (svt < SVt_PVAV)
319	{
320	STRLEN len = 0;
321	char *pv = svt ? SvPV (sv, len) : 0;
322
323	if (len == 1 && *pv == '1')
324	encode_ch (enc, 0xe0 | 21);
325	else if (len == 1 && *pv == '0')
326	encode_ch (enc, 0xe0 | 20);
327	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
328	encode_ch (enc, 0xe0 | 23);
329	else
330	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
331	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
332	}
333	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
334	encode_ch (enc, 0xe0 | 23);
335	else	510	else
336	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	511	{
337	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	512	encode_tag (enc, CBOR_TAG_INDIRECTION);
		513	encode_sv (enc, sv);
		514	}
338	}	515	}
339		516
340	static void	517	static void
341	encode_nv (enc_t *enc, SV *sv)	518	encode_nv (enc_t *enc, SV *sv)
342	{	519	{
343	double nv = SvNVX (sv);	520	double nv = SvNVX (sv);
344		521
345	need (enc, 9);	522	need (enc, 9);
346		523
347	if (ecb_expect_false (nv == (U32)nv))	524	if (ecb_expect_false (nv == (NV)(U32)nv))
348	encode_uint (enc, 0x00, (U32)nv);	525	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
349	//TODO: maybe I32?	526	//TODO: maybe I32?
350	else if (ecb_expect_false (nv == (float)nv))	527	else if (ecb_expect_false (nv == (float)nv))
351	{	528	{
352	uint32_t fp = ecb_float_to_binary32 (nv);	529	uint32_t fp = ecb_float_to_binary32 (nv);
353		530
354	*enc->cur++ = 0xe0 | 26;	531	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
355		532
356	if (!ecb_big_endian ())	533	if (!ecb_big_endian ())
357	fp = ecb_bswap32 (fp);	534	fp = ecb_bswap32 (fp);
358		535
359	memcpy (enc->cur, &fp, 4);	536	memcpy (enc->cur, &fp, 4);
…		…
361	}	538	}
362	else	539	else
363	{	540	{
364	uint64_t fp = ecb_double_to_binary64 (nv);	541	uint64_t fp = ecb_double_to_binary64 (nv);
365		542
366	*enc->cur++ = 0xe0 | 27;	543	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
367		544
368	if (!ecb_big_endian ())	545	if (!ecb_big_endian ())
369	fp = ecb_bswap64 (fp);	546	fp = ecb_bswap64 (fp);
370		547
371	memcpy (enc->cur, &fp, 8);	548	memcpy (enc->cur, &fp, 8);
…		…
380		557
381	if (SvPOKp (sv))	558	if (SvPOKp (sv))
382	{	559	{
383	STRLEN len;	560	STRLEN len;
384	char *str = SvPV (sv, len);	561	char *str = SvPV (sv, len);
385	encode_str (enc, SvUTF8 (sv), str, len);	562	encode_strref (enc, SvUTF8 (sv), str, len);
386	}	563	}
387	else if (SvNOKp (sv))	564	else if (SvNOKp (sv))
388	encode_nv (enc, sv);	565	encode_nv (enc, sv);
389	else if (SvIOKp (sv))	566	else if (SvIOKp (sv))
390	{	567	{
391	if (SvIsUV (sv))	568	if (SvIsUV (sv))
392	encode_uint (enc, 0x00, SvUVX (sv));	569	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
393	else if (SvIVX (sv) >= 0)	570	else if (SvIVX (sv) >= 0)
394	encode_uint (enc, 0x00, SvIVX (sv));	571	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
395	else	572	else
396	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	573	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
397	}	574	}
398	else if (SvROK (sv))	575	else if (SvROK (sv))
399	encode_rv (enc, SvRV (sv));	576	encode_rv (enc, SvRV (sv));
400	else if (!SvOK (sv))	577	else if (!SvOK (sv))
401	encode_ch (enc, 0xe0 | 22);	578	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
402	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	579	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
403	encode_ch (enc, 0xe0 | 23);	580	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
404	else	581	else
405	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	582	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
406	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	583	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
407	}	584	}
408		585
409	static SV *	586	static SV *
410	encode_cbor (SV *scalar, CBOR *cbor)	587	encode_cbor (SV *scalar, CBOR *cbor)
411	{	588	{
412	enc_t enc;	589	enc_t enc = { 0 };
413		590
414	enc.cbor = *cbor;	591	enc.cbor = *cbor;
415	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	592	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
416	enc.cur = SvPVX (enc.sv);	593	enc.cur = SvPVX (enc.sv);
417	enc.end = SvEND (enc.sv);	594	enc.end = SvEND (enc.sv);
418	enc.depth = 0;
419		595
420	SvPOK_only (enc.sv);	596	SvPOK_only (enc.sv);
		597
		598	if (cbor->flags & F_PACK_STRINGS)
		599	{
		600	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		601	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		602	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		603	}
		604
421	encode_sv (&enc, scalar);	605	encode_sv (&enc, scalar);
422		606
423	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	607	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
424	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	608	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
425		609
…		…
439	U8 *end; // end of input string	623	U8 *end; // end of input string
440	const char *err; // parse error, if != 0	624	const char *err; // parse error, if != 0
441	CBOR cbor;	625	CBOR cbor;
442	U32 depth; // recursion depth	626	U32 depth; // recursion depth
443	U32 maxdepth; // recursion depth limit	627	U32 maxdepth; // recursion depth limit
		628	AV *shareable;
		629	AV *stringref;
		630	SV *decode_tagged;
444	} dec_t;	631	} dec_t;
445		632
446	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	633	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE
447		634
448	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	635	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")
…		…
451	#define DEC_DEC_DEPTH --dec->depth	638	#define DEC_DEC_DEPTH --dec->depth
452		639
453	static UV	640	static UV
454	decode_uint (dec_t *dec)	641	decode_uint (dec_t *dec)
455	{	642	{
456	switch (*dec->cur & 31)	643	U8 m = *dec->cur & MINOR_MASK;
457	{	644	++dec->cur;
458	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
459	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
460	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
461	return *dec->cur++ & 31;
462		645
463	case 24:	646	if (ecb_expect_true (m < LENGTH_EXT1))
		647	return m;
		648	else if (ecb_expect_true (m == LENGTH_EXT1))
		649	{
464	WANT (2);	650	WANT (1);
465	dec->cur += 2;	651	dec->cur += 1;
466	return dec->cur[-1];	652	return dec->cur[-1];
467		653	}
468	case 25:	654	else if (ecb_expect_true (m == LENGTH_EXT2))
		655	{
469	WANT (3);	656	WANT (2);
470	dec->cur += 3;	657	dec->cur += 2;
471	return (((UV)dec->cur[-2]) << 8)	658	return (((UV)dec->cur[-2]) << 8)
472	| ((UV)dec->cur[-1]);	659	| ((UV)dec->cur[-1]);
473		660	}
474	case 26:	661	else if (ecb_expect_true (m == LENGTH_EXT4))
		662	{
475	WANT (5);	663	WANT (4);
476	dec->cur += 5;	664	dec->cur += 4;
477	return (((UV)dec->cur[-4]) << 24)	665	return (((UV)dec->cur[-4]) << 24)
478	| (((UV)dec->cur[-3]) << 16)	666	| (((UV)dec->cur[-3]) << 16)
479	| (((UV)dec->cur[-2]) << 8)	667	| (((UV)dec->cur[-2]) << 8)
480	| ((UV)dec->cur[-1]);	668	| ((UV)dec->cur[-1]);
481		669	}
482	case 27:	670	else if (ecb_expect_true (m == LENGTH_EXT8))
		671	{
483	WANT (9);	672	WANT (8);
484	dec->cur += 9;	673	dec->cur += 8;
		674
		675	return
		676	#if UVSIZE < 8
		677	0
		678	#else
485	return (((UV)dec->cur[-8]) << 56)	679	(((UV)dec->cur[-8]) << 56)
486	| (((UV)dec->cur[-7]) << 48)	680	| (((UV)dec->cur[-7]) << 48)
487	| (((UV)dec->cur[-6]) << 40)	681	| (((UV)dec->cur[-6]) << 40)
488	| (((UV)dec->cur[-5]) << 32)	682	| (((UV)dec->cur[-5]) << 32)
		683	#endif
489	| (((UV)dec->cur[-4]) << 24)	684	| (((UV)dec->cur[-4]) << 24)
490	| (((UV)dec->cur[-3]) << 16)	685	| (((UV)dec->cur[-3]) << 16)
491	| (((UV)dec->cur[-2]) << 8)	686	| (((UV)dec->cur[-2]) << 8)
492	| ((UV)dec->cur[-1]);	687	| ((UV)dec->cur[-1]);
493		688	}
494	default:	689	else
495	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	690	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
496	}
497		691
498	fail:	692	fail:
499	return 0;	693	return 0;
500	}	694	}
501		695
…		…
506	{	700	{
507	AV *av = newAV ();	701	AV *av = newAV ();
508		702
509	DEC_INC_DEPTH;	703	DEC_INC_DEPTH;
510		704
511	if ((*dec->cur & 31) == 31)	705	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
512	{	706	{
513	++dec->cur;	707	++dec->cur;
514		708
515	for (;;)	709	for (;;)
516	{	710	{
517	WANT (1);	711	WANT (1);
518		712
519	if (*dec->cur == (0xe0 | 31))	713	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
520	{	714	{
521	++dec->cur;	715	++dec->cur;
522	break;	716	break;
523	}	717	}
524		718
…		…
527	}	721	}
528	else	722	else
529	{	723	{
530	int i, len = decode_uint (dec);	724	int i, len = decode_uint (dec);
531		725
		726	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
532	av_fill (av, len - 1);	727	av_fill (av, len - 1);
533		728
534	for (i = 0; i < len; ++i)	729	for (i = 0; i < len; ++i)
535	AvARRAY (av)[i] = decode_sv (dec);	730	AvARRAY (av)[i] = decode_sv (dec);
536	}	731	}
…		…
542	SvREFCNT_dec (av);	737	SvREFCNT_dec (av);
543	DEC_DEC_DEPTH;	738	DEC_DEC_DEPTH;
544	return &PL_sv_undef;	739	return &PL_sv_undef;
545	}	740	}
546		741
		742	static void
		743	decode_he (dec_t *dec, HV *hv)
		744	{
		745	// for speed reasons, we specialcase single-string
		746	// byte or utf-8 strings as keys, but only when !stringref
		747
		748	if (ecb_expect_true (!dec->stringref))
		749	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		750	{
		751	I32 len = decode_uint (dec);
		752	char *key = (char *)dec->cur;
		753
		754	dec->cur += len;
		755
		756	hv_store (hv, key, len, decode_sv (dec), 0);
		757
		758	return;
		759	}
		760	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		761	{
		762	I32 len = decode_uint (dec);
		763	char *key = (char *)dec->cur;
		764
		765	dec->cur += len;
		766
		767	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		768	if (!is_utf8_string (key, len))
		769	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		770
		771	hv_store (hv, key, -len, decode_sv (dec), 0);
		772
		773	return;
		774	}
		775
		776	SV *k = decode_sv (dec);
		777	SV *v = decode_sv (dec);
		778
		779	hv_store_ent (hv, k, v, 0);
		780	SvREFCNT_dec (k);
		781
		782	fail:
		783	;
		784	}
		785
547	static SV *	786	static SV *
548	decode_hv (dec_t *dec)	787	decode_hv (dec_t *dec)
549	{	788	{
550	HV *hv = newHV ();	789	HV *hv = newHV ();
551		790
552	DEC_INC_DEPTH;	791	DEC_INC_DEPTH;
553		792
554	if ((*dec->cur & 31) == 31)	793	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
555	{	794	{
556	++dec->cur;	795	++dec->cur;
557		796
558	for (;;)	797	for (;;)
559	{	798	{
560	WANT (1);	799	WANT (1);
561		800
562	if (*dec->cur == (0xe0 | 31))	801	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
563	{	802	{
564	++dec->cur;	803	++dec->cur;
565	break;	804	break;
566	}	805	}
567		806
568	SV *k = decode_sv (dec);	807	decode_he (dec, hv);
569	SV *v = decode_sv (dec);
570
571	hv_store_ent (hv, k, v, 0);
572	}	808	}
573	}	809	}
574	else	810	else
575	{	811	{
576	int len = decode_uint (dec);	812	int pairs = decode_uint (dec);
577		813
578	while (len--)	814	while (pairs--)
579	{	815	decode_he (dec, hv);
580	SV *k = decode_sv (dec);
581	SV *v = decode_sv (dec);
582
583	hv_store_ent (hv, k, v, 0);
584	}
585	}	816	}
586		817
587	DEC_DEC_DEPTH;	818	DEC_DEC_DEPTH;
588	return newRV_noinc ((SV *)hv);	819	return newRV_noinc ((SV *)hv);
589		820
…		…
596	static SV *	827	static SV *
597	decode_str (dec_t *dec, int utf8)	828	decode_str (dec_t *dec, int utf8)
598	{	829	{
599	SV *sv = 0;	830	SV *sv = 0;
600		831
601	if ((*dec->cur & 31) == 31)	832	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
602	{	833	{
		834	// indefinite length strings
603	++dec->cur;	835	++dec->cur;
604		836
		837	U8 major = *dec->cur & MAJOR_MISC;
		838
605	sv = newSVpvn ("", 0);	839	sv = newSVpvn ("", 0);
606		840
607	// not very fast, and certainly not robust against illegal input
608	for (;;)	841	for (;;)
609	{	842	{
610	WANT (1);	843	WANT (1);
611		844
612	if (*dec->cur == (0xe0 | 31))	845	if ((*dec->cur - major) > LENGTH_EXT8)
		846	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
613	{	847	{
614	++dec->cur;	848	++dec->cur;
615	break;	849	break;
616	}	850	}
		851	else
		852	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
617		853
618	sv_catsv (sv, decode_sv (dec));	854	STRLEN len = decode_uint (dec);
		855
		856	WANT (len);
		857	sv_catpvn (sv, dec->cur, len);
		858	dec->cur += len;
619	}	859	}
620	}	860	}
621	else	861	else
622	{	862	{
623	STRLEN len = decode_uint (dec);	863	STRLEN len = decode_uint (dec);
624		864
625	WANT (len);	865	WANT (len);
626	sv = newSVpvn (dec->cur, len);	866	sv = newSVpvn (dec->cur, len);
627	dec->cur += len;	867	dec->cur += len;
		868
		869	if (ecb_expect_false (dec->stringref)
		870	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		871	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
628	}	872	}
629		873
630	if (utf8)	874	if (utf8)
		875	{
		876	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		877	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		878	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		879
631	SvUTF8_on (sv);	880	SvUTF8_on (sv);
		881	}
632		882
633	return sv;	883	return sv;
634		884
635	fail:	885	fail:
636	SvREFCNT_dec (sv);	886	SvREFCNT_dec (sv);
…		…
638	}	888	}
639		889
640	static SV *	890	static SV *
641	decode_tagged (dec_t *dec)	891	decode_tagged (dec_t *dec)
642	{	892	{
		893	SV *sv = 0;
643	UV tag = decode_uint (dec);	894	UV tag = decode_uint (dec);
		895
		896	WANT (1);
		897
		898	switch (tag)
		899	{
		900	case CBOR_TAG_MAGIC:
644	SV *sv = decode_sv (dec);	901	sv = decode_sv (dec);
		902	break;
645		903
646	if (tag == CBOR_TAG_MAGIC)	904	case CBOR_TAG_INDIRECTION:
647	return sv;	905	sv = newRV_noinc (decode_sv (dec));
		906	break;
648		907
649	if (tag == CBOR_TAG_PERL_OBJECT)	908	case CBOR_TAG_STRINGREF_NAMESPACE:
650	{	909	{
		910	ENTER; SAVETMPS;
		911
		912	SAVESPTR (dec->stringref);
		913	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		914
		915	sv = decode_sv (dec);
		916
		917	FREETMPS; LEAVE;
		918	}
		919	break;
		920
		921	case CBOR_TAG_STRINGREF:
		922	{
		923	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		924	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		925
		926	UV idx = decode_uint (dec);
		927
		928	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		929	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		930
		931	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		932	}
		933	break;
		934
		935	case CBOR_TAG_VALUE_SHAREABLE:
		936	{
		937	if (ecb_expect_false (!dec->shareable))
		938	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		939
		940	if (dec->cbor.flags & F_ALLOW_CYCLES)
		941	{
		942	sv = newSV (0);
		943	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		944
		945	SV *osv = decode_sv (dec);
		946	sv_setsv (sv, osv);
		947	SvREFCNT_dec_NN (osv);
		948	}
		949	else
		950	{
		951	av_push (dec->shareable, &PL_sv_undef);
		952	int idx = AvFILLp (dec->shareable);
		953	sv = decode_sv (dec);
		954	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		955	}
		956	}
		957	break;
		958
		959	case CBOR_TAG_VALUE_SHAREDREF:
		960	{
		961	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		962	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		963
		964	UV idx = decode_uint (dec);
		965
		966	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		967	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		968
		969	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		970
		971	if (sv == &PL_sv_undef)
		972	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		973	}
		974	break;
		975
		976	case CBOR_TAG_PERL_OBJECT:
		977	{
		978	sv = decode_sv (dec);
		979
651	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)	980	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
652	ERR ("corrupted CBOR data (non-array perl object)");	981	ERR ("corrupted CBOR data (non-array perl object)");
		982
		983	AV *av = (AV *)SvRV (sv);
		984	int len = av_len (av) + 1;
		985	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		986
		987	if (!stash)
		988	ERR ("cannot decode perl-object (package does not exist)");
		989
		990	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		991
		992	if (!method)
		993	ERR ("cannot decode perl-object (package does not have a THAW method)");
		994
		995	dSP;
		996
		997	ENTER; SAVETMPS; PUSHMARK (SP);
		998	EXTEND (SP, len + 1);
		999	// we re-bless the reference to get overload and other niceties right
		1000	PUSHs (*av_fetch (av, 0, 1));
		1001	PUSHs (sv_cbor);
		1002
		1003	int i;
		1004
		1005	for (i = 1; i < len; ++i)
		1006	PUSHs (*av_fetch (av, i, 1));
		1007
		1008	PUTBACK;
		1009	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1010	SPAGAIN;
		1011
		1012	if (SvTRUE (ERRSV))
		1013	{
		1014	FREETMPS; LEAVE;
		1015	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1016	}
		1017
		1018	SvREFCNT_dec (sv);
		1019	sv = SvREFCNT_inc (POPs);
		1020
		1021	PUTBACK;
		1022
		1023	FREETMPS; LEAVE;
653		1024	}
654	// TODO	1025	break;
655	}
656		1026
		1027	default:
		1028	{
		1029	sv = decode_sv (dec);
		1030
		1031	dSP;
		1032	ENTER; SAVETMPS; PUSHMARK (SP);
		1033	EXTEND (SP, 2);
		1034	PUSHs (newSVuv (tag));
		1035	PUSHs (sv);
		1036
		1037	PUTBACK;
		1038	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1039	SPAGAIN;
		1040
		1041	if (SvTRUE (ERRSV))
		1042	{
		1043	FREETMPS; LEAVE;
		1044	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1045	}
		1046
		1047	if (count)
		1048	{
		1049	SvREFCNT_dec (sv);
		1050	sv = SvREFCNT_inc (POPs);
		1051	}
		1052	else
		1053	{
657	AV *av = newAV ();	1054	AV *av = newAV ();
658	av_push (av, newSVuv (tag));	1055	av_push (av, newSVuv (tag));
659	av_push (av, sv);	1056	av_push (av, sv);
660		1057
661	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	1058	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
662	? cbor_tagged_stash	1059	? cbor_tagged_stash
663	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1060	: gv_stashpv ("CBOR::XS::Tagged" , 1);
664
665	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);	1061	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1062	}
		1063
		1064	PUTBACK;
		1065
		1066	FREETMPS; LEAVE;
		1067	}
		1068	break;
		1069	}
		1070
		1071	return sv;
666		1072
667	fail:	1073	fail:
668	SvREFCNT_dec (sv);	1074	SvREFCNT_dec (sv);
669	return &PL_sv_undef;	1075	return &PL_sv_undef;
670	}	1076	}
…		…
672	static SV *	1078	static SV *
673	decode_sv (dec_t *dec)	1079	decode_sv (dec_t *dec)
674	{	1080	{
675	WANT (1);	1081	WANT (1);
676		1082
677	switch (*dec->cur >> 5)	1083	switch (*dec->cur >> MAJOR_SHIFT)
678	{	1084	{
679	case 0: // unsigned int	1085	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
680	return newSVuv (decode_uint (dec));	1086	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
681	case 1: // negative int	1087	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
682	return newSViv (-1 - (IV)decode_uint (dec));	1088	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
683	case 2: // octet string	1089	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
684	return decode_str (dec, 0);	1090	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
685	case 3: // utf-8 string	1091	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
686	return decode_str (dec, 1);	1092
687	case 4: // array	1093	case MAJOR_MISC >> MAJOR_SHIFT:
688	return decode_av (dec);
689	case 5: // map
690	return decode_hv (dec);
691	case 6: // tag
692	return decode_tagged (dec);
693	case 7: // misc
694	switch (*dec->cur++ & 31)	1094	switch (*dec->cur++ & MINOR_MASK)
695	{	1095	{
696	case 20:	1096	case SIMPLE_FALSE:
697	#if CBOR_SLOW	1097	#if CBOR_SLOW
698	cbor_false = get_bool ("CBOR::XS::false");	1098	types_false = get_bool ("Types::Serialiser::false");
699	#endif	1099	#endif
700	return newSVsv (cbor_false);	1100	return newSVsv (types_false);
701	case 21:	1101	case SIMPLE_TRUE:
702	#if CBOR_SLOW	1102	#if CBOR_SLOW
703	cbor_true = get_bool ("CBOR::XS::true");	1103	types_true = get_bool ("Types::Serialiser::true");
704	#endif	1104	#endif
705	return newSVsv (cbor_true);	1105	return newSVsv (types_true);
706	case 22:	1106	case SIMPLE_NULL:
707	return newSVsv (&PL_sv_undef);	1107	return newSVsv (&PL_sv_undef);
		1108	case SIMPLE_UNDEF:
		1109	#if CBOR_SLOW
		1110	types_error = get_bool ("Types::Serialiser::error");
		1111	#endif
		1112	return newSVsv (types_error);
708		1113
709	case 25:	1114	case MISC_FLOAT16:
710	{	1115	{
711	WANT (2);	1116	WANT (2);
712		1117
713	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1118	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
714	dec->cur += 2;	1119	dec->cur += 2;
715		1120
716	return newSVnv (ecb_binary16_to_float (fp));	1121	return newSVnv (ecb_binary16_to_float (fp));
717	}	1122	}
718		1123
719	case 26:	1124	case MISC_FLOAT32:
720	{	1125	{
721	uint32_t fp;	1126	uint32_t fp;
722	WANT (4);	1127	WANT (4);
723	memcpy (&fp, dec->cur, 4);	1128	memcpy (&fp, dec->cur, 4);
724	dec->cur += 4;	1129	dec->cur += 4;
…		…
727	fp = ecb_bswap32 (fp);	1132	fp = ecb_bswap32 (fp);
728		1133
729	return newSVnv (ecb_binary32_to_float (fp));	1134	return newSVnv (ecb_binary32_to_float (fp));
730	}	1135	}
731		1136
732	case 27:	1137	case MISC_FLOAT64:
733	{	1138	{
734	uint64_t fp;	1139	uint64_t fp;
735	WANT (8);	1140	WANT (8);
736	memcpy (&fp, dec->cur, 8);	1141	memcpy (&fp, dec->cur, 8);
737	dec->cur += 8;	1142	dec->cur += 8;
…		…
740	fp = ecb_bswap64 (fp);	1145	fp = ecb_bswap64 (fp);
741		1146
742	return newSVnv (ecb_binary64_to_double (fp));	1147	return newSVnv (ecb_binary64_to_double (fp));
743	}	1148	}
744		1149
745	// 0..19 unassigned	1150	// 0..19 unassigned simple
746	// 24 reserved + unassigned (reserved values are not encodable)	1151	// 24 reserved + unassigned simple (reserved values are not encodable)
		1152	// 28-30 unassigned misc
		1153	// 31 break code
747	default:	1154	default:
748	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1155	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
749	}	1156	}
750		1157
751	break;	1158	break;
752	}	1159	}
753		1160
…		…
756	}	1163	}
757		1164
758	static SV *	1165	static SV *
759	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1166	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
760	{	1167	{
761	dec_t dec;	1168	dec_t dec = { 0 };
762	SV *sv;	1169	SV *sv;
		1170	STRLEN len;
		1171	char *data = SvPVbyte (string, len);
763		1172
764	/* work around bugs in 5.10 where manipulating magic values
765	* makes perl ignore the magic in subsequent accesses.
766	* also make a copy of non-PV values, to get them into a clean
767	* state (SvPV should do that, but it's buggy, see below).
768	*/
769	/*SvGETMAGIC (string);*/
770	if (SvMAGICAL (string) || !SvPOK (string))
771	string = sv_2mortal (newSVsv (string));
772
773	SvUPGRADE (string, SVt_PV);
774
775	/* work around a bug in perl 5.10, which causes SvCUR to fail an
776	* assertion with -DDEBUGGING, although SvCUR is documented to
777	* return the xpv_cur field which certainly exists after upgrading.
778	* according to nicholas clark, calling SvPOK fixes this.
779	* But it doesn't fix it, so try another workaround, call SvPV_nolen
780	* and hope for the best.
781	* Damnit, SvPV_nolen still trips over yet another assertion. This
782	* assertion business is seriously broken, try yet another workaround
783	* for the broken -DDEBUGGING.
784	*/
785	{
786	#ifdef DEBUGGING
787	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
788	#else
789	STRLEN offset = SvCUR (string);
790	#endif
791
792	if (offset > cbor->max_size && cbor->max_size)	1173	if (len > cbor->max_size && cbor->max_size)
793	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1174	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
794	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1175	(unsigned long)len, (unsigned long)cbor->max_size);
795	}
796
797	sv_utf8_downgrade (string, 0);
798		1176
799	dec.cbor = *cbor;	1177	dec.cbor = *cbor;
800	dec.cur = (U8 *)SvPVX (string);	1178	dec.cur = (U8 *)data;
801	dec.end = (U8 *)SvEND (string);	1179	dec.end = (U8 *)data + len;
802	dec.err = 0;
803	dec.depth = 0;
804		1180
805	sv = decode_sv (&dec);	1181	sv = decode_sv (&dec);
806		1182
807	if (offset_return)	1183	if (offset_return)
808	*offset_return = dec.cur;	1184	*offset_return = dec.cur;
…		…
811	if (dec.cur != dec.end && !dec.err)	1187	if (dec.cur != dec.end && !dec.err)
812	dec.err = "garbage after CBOR object";	1188	dec.err = "garbage after CBOR object";
813		1189
814	if (dec.err)	1190	if (dec.err)
815	{	1191	{
		1192	if (dec.shareable)
		1193	{
		1194	// need to break cyclic links, which whould all be in shareable
		1195	int i;
		1196	SV **svp;
		1197
		1198	for (i = av_len (dec.shareable) + 1; i--; )
		1199	if ((svp = av_fetch (dec.shareable, i, 0)))
		1200	sv_setsv (*svp, &PL_sv_undef);
		1201	}
		1202
816	SvREFCNT_dec (sv);	1203	SvREFCNT_dec (sv);
817	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1204	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
818	}	1205	}
819		1206
820	sv = sv_2mortal (sv);	1207	sv = sv_2mortal (sv);
821		1208
822	return sv;	1209	return sv;
823	}	1210	}
824		1211
		1212	/////////////////////////////////////////////////////////////////////////////
		1213	// incremental parser
		1214
		1215	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1216
		1217	// returns 0 for notyet, 1 for success or error
		1218	static int
		1219	incr_parse (CBOR *self, SV *cborstr)
		1220	{
		1221	STRLEN cur;
		1222	SvPV (cborstr, cur);
		1223
		1224	while (ecb_expect_true (self->incr_need <= cur))
		1225	{
		1226	// table of integer count bytes
		1227	static I8 incr_len[MINOR_MASK + 1] = {
		1228	0, 0, 0, 0, 0, 0, 0, 0,
		1229	0, 0, 0, 0, 0, 0, 0, 0,
		1230	0, 0, 0, 0, 0, 0, 0, 0,
		1231	1, 2, 4, 8,-1,-1,-1,-2
		1232	};
		1233
		1234	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1235	U8 m = *p & MINOR_MASK;
		1236	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1237	I8 ilen = incr_len[m];
		1238
		1239	self->incr_need = self->incr_pos + 1;
		1240
		1241	if (ecb_expect_false (ilen < 0))
		1242	{
		1243	if (m != MINOR_INDEF)
		1244	return 1; // error
		1245
		1246	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1247	{
		1248	if (count >= 0)
		1249	return 1; // error
		1250
		1251	count = 1;
		1252	}
		1253	else
		1254	{
		1255	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1256	count = -1;
		1257	}
		1258	}
		1259	else
		1260	{
		1261	self->incr_need += ilen;
		1262	if (ecb_expect_false (self->incr_need > cur))
		1263	return 0;
		1264
		1265	int major = *p >> MAJOR_SHIFT;
		1266
		1267	switch (major)
		1268	{
		1269	case MAJOR_TAG >> MAJOR_SHIFT:
		1270	++count; // tags merely prefix another value
		1271	break;
		1272
		1273	case MAJOR_BYTES >> MAJOR_SHIFT:
		1274	case MAJOR_TEXT >> MAJOR_SHIFT:
		1275	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1276	case MAJOR_MAP >> MAJOR_SHIFT:
		1277	{
		1278	UV len;
		1279
		1280	if (ecb_expect_false (ilen))
		1281	{
		1282	len = 0;
		1283
		1284	do {
		1285	len = (len << 8) | *++p;
		1286	} while (--ilen);
		1287	}
		1288	else
		1289	len = m;
		1290
		1291	switch (major)
		1292	{
		1293	case MAJOR_BYTES >> MAJOR_SHIFT:
		1294	case MAJOR_TEXT >> MAJOR_SHIFT:
		1295	self->incr_need += len;
		1296	if (ecb_expect_false (self->incr_need > cur))
		1297	return 0;
		1298
		1299	break;
		1300
		1301	case MAJOR_MAP >> MAJOR_SHIFT:
		1302	len <<= 1;
		1303	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1304	if (len)
		1305	{
		1306	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1307	count = len + 1;
		1308	}
		1309	break;
		1310	}
		1311	}
		1312	}
		1313	}
		1314
		1315	self->incr_pos = self->incr_need;
		1316
		1317	if (count > 0)
		1318	{
		1319	while (!--count)
		1320	{
		1321	if (!AvFILLp (self->incr_count))
		1322	return 1; // done
		1323
		1324	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1325	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1326	}
		1327
		1328	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1329	}
		1330	}
		1331
		1332	return 0;
		1333	}
		1334
		1335
825	/////////////////////////////////////////////////////////////////////////////	1336	/////////////////////////////////////////////////////////////////////////////
826	// XS interface functions	1337	// XS interface functions
827		1338
828	MODULE = CBOR::XS PACKAGE = CBOR::XS	1339	MODULE = CBOR::XS PACKAGE = CBOR::XS
829		1340
830	BOOT:	1341	BOOT:
831	{	1342	{
832	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1343	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
833	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);
834	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);	1344	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
835		1345
836	cbor_true = get_bool ("CBOR::XS::true");	1346	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
837	cbor_false = get_bool ("CBOR::XS::false");	1347	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1348
		1349	types_true = get_bool ("Types::Serialiser::true" );
		1350	types_false = get_bool ("Types::Serialiser::false");
		1351	types_error = get_bool ("Types::Serialiser::error");
		1352
		1353	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1354
		1355	sv_cbor = newSVpv ("CBOR", 0);
		1356	SvREADONLY_on (sv_cbor);
838	}	1357	}
839		1358
840	PROTOTYPES: DISABLE	1359	PROTOTYPES: DISABLE
841		1360
842	void CLONE (...)	1361	void CLONE (...)
843	CODE:	1362	CODE:
844	cbor_stash = 0;	1363	cbor_stash = 0;
845	cbor_boolean_stash = 0;
846	cbor_tagged_stash = 0;	1364	cbor_tagged_stash = 0;
		1365	types_error_stash = 0;
		1366	types_boolean_stash = 0;
847		1367
848	void new (char *klass)	1368	void new (char *klass)
849	PPCODE:	1369	PPCODE:
850	{	1370	{
851	SV *pv = NEWSV (0, sizeof (CBOR));	1371	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
859		1379
860	void shrink (CBOR *self, int enable = 1)	1380	void shrink (CBOR *self, int enable = 1)
861	ALIAS:	1381	ALIAS:
862	shrink = F_SHRINK	1382	shrink = F_SHRINK
863	allow_unknown = F_ALLOW_UNKNOWN	1383	allow_unknown = F_ALLOW_UNKNOWN
		1384	allow_sharing = F_ALLOW_SHARING
		1385	allow_cycles = F_ALLOW_CYCLES
		1386	pack_strings = F_PACK_STRINGS
		1387	validate_utf8 = F_VALIDATE_UTF8
864	PPCODE:	1388	PPCODE:
865	{	1389	{
866	if (enable)	1390	if (enable)
867	self->flags |= ix;	1391	self->flags |= ix;
868	else	1392	else
…		…
873		1397
874	void get_shrink (CBOR *self)	1398	void get_shrink (CBOR *self)
875	ALIAS:	1399	ALIAS:
876	get_shrink = F_SHRINK	1400	get_shrink = F_SHRINK
877	get_allow_unknown = F_ALLOW_UNKNOWN	1401	get_allow_unknown = F_ALLOW_UNKNOWN
		1402	get_allow_sharing = F_ALLOW_SHARING
		1403	get_allow_cycles = F_ALLOW_CYCLES
		1404	get_pack_strings = F_PACK_STRINGS
		1405	get_validate_utf8 = F_VALIDATE_UTF8
878	PPCODE:	1406	PPCODE:
879	XPUSHs (boolSV (self->flags & ix));	1407	XPUSHs (boolSV (self->flags & ix));
880		1408
881	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1409	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
882	PPCODE:	1410	PPCODE:
…		…
898	CODE:	1426	CODE:
899	RETVAL = self->max_size;	1427	RETVAL = self->max_size;
900	OUTPUT:	1428	OUTPUT:
901	RETVAL	1429	RETVAL
902		1430
903	#if 0 //TODO	1431	void filter (CBOR *self, SV *filter = 0)
904
905	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
906	PPCODE:	1432	PPCODE:
907	{
908	SvREFCNT_dec (self->cb_object);	1433	SvREFCNT_dec (self->filter);
909	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1434	self->filter = filter ? newSVsv (filter) : filter;
910
911	XPUSHs (ST (0));	1435	XPUSHs (ST (0));
912	}
913		1436
914	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1437	SV *get_filter (CBOR *self)
915	PPCODE:	1438	CODE:
916	{	1439	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
917	if (!self->cb_sk_object)	1440	OUTPUT:
918	self->cb_sk_object = newHV ();	1441	RETVAL
919
920	if (SvOK (cb))
921	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
922	else
923	{
924	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
925
926	if (!HvKEYS (self->cb_sk_object))
927	{
928	SvREFCNT_dec (self->cb_sk_object);
929	self->cb_sk_object = 0;
930	}
931	}
932
933	XPUSHs (ST (0));
934	}
935
936	#endif
937		1442
938	void encode (CBOR *self, SV *scalar)	1443	void encode (CBOR *self, SV *scalar)
939	PPCODE:	1444	PPCODE:
940	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1445	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
941	XPUSHs (scalar);	1446	XPUSHs (scalar);
…		…
954	EXTEND (SP, 2);	1459	EXTEND (SP, 2);
955	PUSHs (sv);	1460	PUSHs (sv);
956	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1461	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
957	}	1462	}
958		1463
959	#if 0	1464	void incr_parse (CBOR *self, SV *cborstr)
		1465	ALIAS:
		1466	incr_parse_multiple = 1
		1467	PPCODE:
		1468	{
		1469	if (SvUTF8 (cborstr))
		1470	sv_utf8_downgrade (cborstr, 0);
		1471
		1472	if (!self->incr_count)
		1473	{
		1474	self->incr_count = newAV ();
		1475	self->incr_pos = 0;
		1476	self->incr_need = 1;
		1477
		1478	av_push (self->incr_count, newSViv (1));
		1479	}
		1480
		1481	do
		1482	{
		1483	if (!incr_parse (self, cborstr))
		1484	{
		1485	if (self->incr_need > self->max_size && self->max_size)
		1486	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1487	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1488
		1489	break;
		1490	}
		1491
		1492	SV *sv;
		1493	char *offset;
		1494
		1495	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1496	XPUSHs (sv);
		1497
		1498	sv_chop (cborstr, offset);
		1499
		1500	av_clear (self->incr_count);
		1501	av_push (self->incr_count, newSViv (1));
		1502
		1503	self->incr_pos = 0;
		1504	self->incr_need = self->incr_pos + 1;
		1505	}
		1506	while (ix);
		1507	}
		1508
		1509	void incr_reset (CBOR *self)
		1510	CODE:
		1511	{
		1512	SvREFCNT_dec (self->incr_count);
		1513	self->incr_count = 0;
		1514	}
960		1515
961	void DESTROY (CBOR *self)	1516	void DESTROY (CBOR *self)
962	CODE:	1517	PPCODE:
963	SvREFCNT_dec (self->cb_sk_object);	1518	cbor_free (self);
964	SvREFCNT_dec (self->cb_object);
965
966	#endif
967		1519
968	PROTOTYPES: ENABLE	1520	PROTOTYPES: ENABLE
969		1521
970	void encode_cbor (SV *scalar)	1522	void encode_cbor (SV *scalar)
		1523	ALIAS:
		1524	encode_cbor = 0
		1525	encode_cbor_sharing = F_ALLOW_SHARING
971	PPCODE:	1526	PPCODE:
972	{	1527	{
973	CBOR cbor;	1528	CBOR cbor;
974	cbor_init (&cbor);	1529	cbor_init (&cbor);
		1530	cbor.flags |= ix;
975	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1531	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
976	XPUSHs (scalar);	1532	XPUSHs (scalar);
977	}	1533	}
978		1534
979	void decode_cbor (SV *cborstr)	1535	void decode_cbor (SV *cborstr)

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