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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 1.49 by root, Mon Feb 8 04:11:11 2016 UTC

…		…
7	#include <stdlib.h>	7	#include <stdlib.h>
8	#include <stdio.h>	8	#include <stdio.h>
9	#include <limits.h>	9	#include <limits.h>
10	#include <float.h>	10	#include <float.h>
11		11
		12	#define ECB_NO_THREADS 1
12	#include "ecb.h"	13	#include "ecb.h"
		14
		15	// compatibility with perl <5.18
		16	#ifndef HvNAMELEN_get
		17	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		18	#endif
		19	#ifndef HvNAMELEN
		20	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		21	#endif
		22	#ifndef HvNAMEUTF8
		23	# define HvNAMEUTF8(hv) 0
		24	#endif
		25	#ifndef SvREFCNT_dec_NN
		26	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		27	#endif
		28
		29	// known major and minor types
		30	enum cbor_type
		31	{
		32	MAJOR_SHIFT = 5,
		33	MINOR_MASK = 0x1f,
		34
		35	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		36	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		37	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		38	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		39	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		40	MAJOR_MAP = 5 << MAJOR_SHIFT,
		41	MAJOR_TAG = 6 << MAJOR_SHIFT,
		42	MAJOR_MISC = 7 << MAJOR_SHIFT,
		43
		44	// INT/STRING/ARRAY/MAP subtypes
		45	LENGTH_EXT1 = 24,
		46	LENGTH_EXT2 = 25,
		47	LENGTH_EXT4 = 26,
		48	LENGTH_EXT8 = 27,
		49
		50	// SIMPLE types (effectively MISC subtypes)
		51	SIMPLE_FALSE = 20,
		52	SIMPLE_TRUE = 21,
		53	SIMPLE_NULL = 22,
		54	SIMPLE_UNDEF = 23,
		55
		56	// MISC subtype (unused)
		57	MISC_EXT1 = 24,
		58	MISC_FLOAT16 = 25,
		59	MISC_FLOAT32 = 26,
		60	MISC_FLOAT64 = 27,
		61
		62	// BYTES/TEXT/ARRAY/MAP
		63	MINOR_INDEF = 31,
		64	};
13		65
14	// known tags	66	// known tags
15	enum cbor_tag	67	enum cbor_tag
16	{	68	{
17	// inofficial extensions (pending iana registration)	69	// extensions
18	CBOR_TAG_PERL_OBJECT = 256,	70	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
19	CBOR_TAG_GENERIC_OBJECT = 257,	71	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
		72	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
		73	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
		74	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
		75	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
		76	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
20		77
21	// rfc7049	78	// rfc7049
22	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	79	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
23	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	80	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
24	CBOR_TAG_POS_BIGNUM = 2, // byte string	81	CBOR_TAG_POS_BIGNUM = 2, // byte string
25	CBOR_TAG_NEG_BIGNUM = 3, // byte string	82	CBOR_TAG_NEG_BIGNUM = 3, // byte string
26	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	83	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
27	CBOR_TAG_BIGFLOAT = 5, // array	84	CBOR_TAG_BIGFLOAT = 5, // array
28		85
29	CBOR_TAG_CONV_B64U = 21, // base64url, any	86	CBOR_TAG_CONV_B64U = 21, // base64url, any
30	CBOR_TAG_CONV_B64 = 22, // base64, any	87	CBOR_TAG_CONV_B64 = 22, // base64, any
31	CBOR_TAG_CONV_HEX = 23, // base16, any	88	CBOR_TAG_CONV_HEX = 23, // base16, any
32	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	89	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
33		90
34	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	91	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
35	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	92	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
36	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	93	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
37	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	94	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
38	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	95	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
39		96
40	CBOR_TAG_MAGIC = 55799 // self-describe cbor	97	CBOR_TAG_MAGIC = 55799, // self-describe cbor
41	};	98	};
42		99
43	#define F_SHRINK 0x00000200UL	100	#define F_SHRINK 0x00000001UL
44	#define F_ALLOW_UNKNOWN 0x00002000UL	101	#define F_ALLOW_UNKNOWN 0x00000002UL
		102	#define F_ALLOW_SHARING 0x00000004UL
		103	#define F_ALLOW_CYCLES 0x00000008UL
		104	#define F_PACK_STRINGS 0x00000010UL
		105	#define F_VALIDATE_UTF8 0x00000020UL
45		106
46	#define INIT_SIZE 32 // initial scalar size to be allocated	107	#define INIT_SIZE 32 // initial scalar size to be allocated
47		108
48	#define SB do {	109	#define SB do {
49	#define SE } while (0)	110	#define SE } while (0)
…		…
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	WANT (len);
		755	dec->cur += len;
		756
		757	hv_store (hv, key, len, decode_sv (dec), 0);
		758
		759	return;
		760	}
		761	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		762	{
		763	I32 len = decode_uint (dec);
		764	char *key = (char *)dec->cur;
		765
		766	WANT (len);
		767	dec->cur += len;
		768
		769	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		770	if (!is_utf8_string (key, len))
		771	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		772
		773	hv_store (hv, key, -len, decode_sv (dec), 0);
		774
		775	return;
		776	}
		777
		778	SV *k = decode_sv (dec);
		779	SV *v = decode_sv (dec);
		780
		781	hv_store_ent (hv, k, v, 0);
		782	SvREFCNT_dec (k);
		783
		784	fail:
		785	;
		786	}
		787
547	static SV *	788	static SV *
548	decode_hv (dec_t *dec)	789	decode_hv (dec_t *dec)
549	{	790	{
550	HV *hv = newHV ();	791	HV *hv = newHV ();
551		792
552	DEC_INC_DEPTH;	793	DEC_INC_DEPTH;
553		794
554	if ((*dec->cur & 31) == 31)	795	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
555	{	796	{
556	++dec->cur;	797	++dec->cur;
557		798
558	for (;;)	799	for (;;)
559	{	800	{
560	WANT (1);	801	WANT (1);
561		802
562	if (*dec->cur == (0xe0 | 31))	803	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
563	{	804	{
564	++dec->cur;	805	++dec->cur;
565	break;	806	break;
566	}	807	}
567		808
568	SV *k = decode_sv (dec);	809	decode_he (dec, hv);
569	SV *v = decode_sv (dec);
570
571	hv_store_ent (hv, k, v, 0);
572	}	810	}
573	}	811	}
574	else	812	else
575	{	813	{
576	int len = decode_uint (dec);	814	int pairs = decode_uint (dec);
577		815
578	while (len--)	816	while (pairs--)
579	{	817	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	}	818	}
586		819
587	DEC_DEC_DEPTH;	820	DEC_DEC_DEPTH;
588	return newRV_noinc ((SV *)hv);	821	return newRV_noinc ((SV *)hv);
589		822
…		…
596	static SV *	829	static SV *
597	decode_str (dec_t *dec, int utf8)	830	decode_str (dec_t *dec, int utf8)
598	{	831	{
599	SV *sv = 0;	832	SV *sv = 0;
600		833
601	if ((*dec->cur & 31) == 31)	834	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
602	{	835	{
		836	// indefinite length strings
603	++dec->cur;	837	++dec->cur;
604		838
		839	U8 major = *dec->cur & MAJOR_MISC;
		840
605	sv = newSVpvn ("", 0);	841	sv = newSVpvn ("", 0);
606		842
607	// not very fast, and certainly not robust against illegal input
608	for (;;)	843	for (;;)
609	{	844	{
610	WANT (1);	845	WANT (1);
611		846
612	if (*dec->cur == (0xe0 | 31))	847	if ((*dec->cur - major) > LENGTH_EXT8)
		848	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
613	{	849	{
614	++dec->cur;	850	++dec->cur;
615	break;	851	break;
616	}	852	}
		853	else
		854	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
617		855
618	sv_catsv (sv, decode_sv (dec));	856	STRLEN len = decode_uint (dec);
		857
		858	WANT (len);
		859	sv_catpvn (sv, dec->cur, len);
		860	dec->cur += len;
619	}	861	}
620	}	862	}
621	else	863	else
622	{	864	{
623	STRLEN len = decode_uint (dec);	865	STRLEN len = decode_uint (dec);
624		866
625	WANT (len);	867	WANT (len);
626	sv = newSVpvn (dec->cur, len);	868	sv = newSVpvn (dec->cur, len);
627	dec->cur += len;	869	dec->cur += len;
		870
		871	if (ecb_expect_false (dec->stringref)
		872	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		873	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
628	}	874	}
629		875
630	if (utf8)	876	if (utf8)
		877	{
		878	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		879	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		880	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		881
631	SvUTF8_on (sv);	882	SvUTF8_on (sv);
		883	}
632		884
633	return sv;	885	return sv;
634		886
635	fail:	887	fail:
636	SvREFCNT_dec (sv);	888	SvREFCNT_dec (sv);
…		…
638	}	890	}
639		891
640	static SV *	892	static SV *
641	decode_tagged (dec_t *dec)	893	decode_tagged (dec_t *dec)
642	{	894	{
		895	SV *sv = 0;
643	UV tag = decode_uint (dec);	896	UV tag = decode_uint (dec);
		897
		898	WANT (1);
		899
		900	switch (tag)
		901	{
		902	case CBOR_TAG_MAGIC:
644	SV *sv = decode_sv (dec);	903	sv = decode_sv (dec);
		904	break;
645		905
646	if (tag == CBOR_TAG_MAGIC)	906	case CBOR_TAG_INDIRECTION:
647	return sv;	907	sv = newRV_noinc (decode_sv (dec));
		908	break;
648		909
649	if (tag == CBOR_TAG_PERL_OBJECT)	910	case CBOR_TAG_STRINGREF_NAMESPACE:
650	{	911	{
		912	ENTER; SAVETMPS;
		913
		914	SAVESPTR (dec->stringref);
		915	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		916
		917	sv = decode_sv (dec);
		918
		919	FREETMPS; LEAVE;
		920	}
		921	break;
		922
		923	case CBOR_TAG_STRINGREF:
		924	{
		925	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		926	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		927
		928	UV idx = decode_uint (dec);
		929
		930	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		931	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		932
		933	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		934	}
		935	break;
		936
		937	case CBOR_TAG_VALUE_SHAREABLE:
		938	{
		939	if (ecb_expect_false (!dec->shareable))
		940	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		941
		942	if (dec->cbor.flags & F_ALLOW_CYCLES)
		943	{
		944	sv = newSV (0);
		945	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		946
		947	SV *osv = decode_sv (dec);
		948	sv_setsv (sv, osv);
		949	SvREFCNT_dec_NN (osv);
		950	}
		951	else
		952	{
		953	av_push (dec->shareable, &PL_sv_undef);
		954	int idx = AvFILLp (dec->shareable);
		955	sv = decode_sv (dec);
		956	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		957	}
		958	}
		959	break;
		960
		961	case CBOR_TAG_VALUE_SHAREDREF:
		962	{
		963	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		964	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		965
		966	UV idx = decode_uint (dec);
		967
		968	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		969	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		970
		971	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		972
		973	if (sv == &PL_sv_undef)
		974	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		975	}
		976	break;
		977
		978	case CBOR_TAG_PERL_OBJECT:
		979	{
		980	sv = decode_sv (dec);
		981
651	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)	982	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
652	ERR ("corrupted CBOR data (non-array perl object)");	983	ERR ("corrupted CBOR data (non-array perl object)");
		984
		985	AV *av = (AV *)SvRV (sv);
		986	int len = av_len (av) + 1;
		987	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		988
		989	if (!stash)
		990	ERR ("cannot decode perl-object (package does not exist)");
		991
		992	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		993
		994	if (!method)
		995	ERR ("cannot decode perl-object (package does not have a THAW method)");
		996
		997	dSP;
		998
		999	ENTER; SAVETMPS; PUSHMARK (SP);
		1000	EXTEND (SP, len + 1);
		1001	// we re-bless the reference to get overload and other niceties right
		1002	PUSHs (*av_fetch (av, 0, 1));
		1003	PUSHs (sv_cbor);
		1004
		1005	int i;
		1006
		1007	for (i = 1; i < len; ++i)
		1008	PUSHs (*av_fetch (av, i, 1));
		1009
		1010	PUTBACK;
		1011	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1012	SPAGAIN;
		1013
		1014	if (SvTRUE (ERRSV))
		1015	{
		1016	FREETMPS; LEAVE;
		1017	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1018	}
		1019
		1020	SvREFCNT_dec (sv);
		1021	sv = SvREFCNT_inc (POPs);
		1022
		1023	PUTBACK;
		1024
		1025	FREETMPS; LEAVE;
653		1026	}
654	// TODO	1027	break;
655	}
656		1028
		1029	default:
		1030	{
		1031	sv = decode_sv (dec);
		1032
		1033	dSP;
		1034	ENTER; SAVETMPS; PUSHMARK (SP);
		1035	EXTEND (SP, 2);
		1036	PUSHs (newSVuv (tag));
		1037	PUSHs (sv);
		1038
		1039	PUTBACK;
		1040	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1041	SPAGAIN;
		1042
		1043	if (SvTRUE (ERRSV))
		1044	{
		1045	FREETMPS; LEAVE;
		1046	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
		1047	}
		1048
		1049	if (count)
		1050	{
		1051	SvREFCNT_dec (sv);
		1052	sv = SvREFCNT_inc (POPs);
		1053	}
		1054	else
		1055	{
657	AV *av = newAV ();	1056	AV *av = newAV ();
658	av_push (av, newSVuv (tag));	1057	av_push (av, newSVuv (tag));
659	av_push (av, sv);	1058	av_push (av, sv);
660		1059
661	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	1060	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
662	? cbor_tagged_stash	1061	? cbor_tagged_stash
663	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1062	: gv_stashpv ("CBOR::XS::Tagged" , 1);
664
665	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);	1063	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1064	}
		1065
		1066	PUTBACK;
		1067
		1068	FREETMPS; LEAVE;
		1069	}
		1070	break;
		1071	}
		1072
		1073	return sv;
666		1074
667	fail:	1075	fail:
668	SvREFCNT_dec (sv);	1076	SvREFCNT_dec (sv);
669	return &PL_sv_undef;	1077	return &PL_sv_undef;
670	}	1078	}
…		…
672	static SV *	1080	static SV *
673	decode_sv (dec_t *dec)	1081	decode_sv (dec_t *dec)
674	{	1082	{
675	WANT (1);	1083	WANT (1);
676		1084
677	switch (*dec->cur >> 5)	1085	switch (*dec->cur >> MAJOR_SHIFT)
678	{	1086	{
679	case 0: // unsigned int	1087	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
680	return newSVuv (decode_uint (dec));	1088	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
681	case 1: // negative int	1089	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
682	return newSViv (-1 - (IV)decode_uint (dec));	1090	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
683	case 2: // octet string	1091	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
684	return decode_str (dec, 0);	1092	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
685	case 3: // utf-8 string	1093	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
686	return decode_str (dec, 1);	1094
687	case 4: // array	1095	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)	1096	switch (*dec->cur++ & MINOR_MASK)
695	{	1097	{
696	case 20:	1098	case SIMPLE_FALSE:
697	#if CBOR_SLOW	1099	#if CBOR_SLOW
698	cbor_false = get_bool ("CBOR::XS::false");	1100	types_false = get_bool ("Types::Serialiser::false");
699	#endif	1101	#endif
700	return newSVsv (cbor_false);	1102	return newSVsv (types_false);
701	case 21:	1103	case SIMPLE_TRUE:
702	#if CBOR_SLOW	1104	#if CBOR_SLOW
703	cbor_true = get_bool ("CBOR::XS::true");	1105	types_true = get_bool ("Types::Serialiser::true");
704	#endif	1106	#endif
705	return newSVsv (cbor_true);	1107	return newSVsv (types_true);
706	case 22:	1108	case SIMPLE_NULL:
707	return newSVsv (&PL_sv_undef);	1109	return newSVsv (&PL_sv_undef);
		1110	case SIMPLE_UNDEF:
		1111	#if CBOR_SLOW
		1112	types_error = get_bool ("Types::Serialiser::error");
		1113	#endif
		1114	return newSVsv (types_error);
708		1115
709	case 25:	1116	case MISC_FLOAT16:
710	{	1117	{
711	WANT (2);	1118	WANT (2);
712		1119
713	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1120	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
714	dec->cur += 2;	1121	dec->cur += 2;
715		1122
716	return newSVnv (ecb_binary16_to_float (fp));	1123	return newSVnv (ecb_binary16_to_float (fp));
717	}	1124	}
718		1125
719	case 26:	1126	case MISC_FLOAT32:
720	{	1127	{
721	uint32_t fp;	1128	uint32_t fp;
722	WANT (4);	1129	WANT (4);
723	memcpy (&fp, dec->cur, 4);	1130	memcpy (&fp, dec->cur, 4);
724	dec->cur += 4;	1131	dec->cur += 4;
…		…
727	fp = ecb_bswap32 (fp);	1134	fp = ecb_bswap32 (fp);
728		1135
729	return newSVnv (ecb_binary32_to_float (fp));	1136	return newSVnv (ecb_binary32_to_float (fp));
730	}	1137	}
731		1138
732	case 27:	1139	case MISC_FLOAT64:
733	{	1140	{
734	uint64_t fp;	1141	uint64_t fp;
735	WANT (8);	1142	WANT (8);
736	memcpy (&fp, dec->cur, 8);	1143	memcpy (&fp, dec->cur, 8);
737	dec->cur += 8;	1144	dec->cur += 8;
…		…
740	fp = ecb_bswap64 (fp);	1147	fp = ecb_bswap64 (fp);
741		1148
742	return newSVnv (ecb_binary64_to_double (fp));	1149	return newSVnv (ecb_binary64_to_double (fp));
743	}	1150	}
744		1151
745	// 0..19 unassigned	1152	// 0..19 unassigned simple
746	// 24 reserved + unassigned (reserved values are not encodable)	1153	// 24 reserved + unassigned simple (reserved values are not encodable)
		1154	// 28-30 unassigned misc
		1155	// 31 break code
747	default:	1156	default:
748	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1157	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
749	}	1158	}
750		1159
751	break;	1160	break;
752	}	1161	}
753		1162
…		…
756	}	1165	}
757		1166
758	static SV *	1167	static SV *
759	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1168	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
760	{	1169	{
761	dec_t dec;	1170	dec_t dec = { 0 };
762	SV *sv;	1171	SV *sv;
		1172	STRLEN len;
		1173	char *data = SvPVbyte (string, len);
763		1174
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)	1175	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",	1176	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);	1177	(unsigned long)len, (unsigned long)cbor->max_size);
795	}
796
797	sv_utf8_downgrade (string, 0);
798		1178
799	dec.cbor = *cbor;	1179	dec.cbor = *cbor;
800	dec.cur = (U8 *)SvPVX (string);	1180	dec.cur = (U8 *)data;
801	dec.end = (U8 *)SvEND (string);	1181	dec.end = (U8 *)data + len;
802	dec.err = 0;
803	dec.depth = 0;
804		1182
805	sv = decode_sv (&dec);	1183	sv = decode_sv (&dec);
806		1184
807	if (offset_return)	1185	if (offset_return)
808	*offset_return = dec.cur;	1186	*offset_return = dec.cur;
…		…
811	if (dec.cur != dec.end && !dec.err)	1189	if (dec.cur != dec.end && !dec.err)
812	dec.err = "garbage after CBOR object";	1190	dec.err = "garbage after CBOR object";
813		1191
814	if (dec.err)	1192	if (dec.err)
815	{	1193	{
		1194	if (dec.shareable)
		1195	{
		1196	// need to break cyclic links, which whould all be in shareable
		1197	int i;
		1198	SV **svp;
		1199
		1200	for (i = av_len (dec.shareable) + 1; i--; )
		1201	if ((svp = av_fetch (dec.shareable, i, 0)))
		1202	sv_setsv (*svp, &PL_sv_undef);
		1203	}
		1204
816	SvREFCNT_dec (sv);	1205	SvREFCNT_dec (sv);
817	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1206	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
818	}	1207	}
819		1208
820	sv = sv_2mortal (sv);	1209	sv = sv_2mortal (sv);
821		1210
822	return sv;	1211	return sv;
823	}	1212	}
824		1213
		1214	/////////////////////////////////////////////////////////////////////////////
		1215	// incremental parser
		1216
		1217	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1218
		1219	// returns 0 for notyet, 1 for success or error
		1220	static int
		1221	incr_parse (CBOR *self, SV *cborstr)
		1222	{
		1223	STRLEN cur;
		1224	SvPV (cborstr, cur);
		1225
		1226	while (ecb_expect_true (self->incr_need <= cur))
		1227	{
		1228	// table of integer count bytes
		1229	static I8 incr_len[MINOR_MASK + 1] = {
		1230	0, 0, 0, 0, 0, 0, 0, 0,
		1231	0, 0, 0, 0, 0, 0, 0, 0,
		1232	0, 0, 0, 0, 0, 0, 0, 0,
		1233	1, 2, 4, 8,-1,-1,-1,-2
		1234	};
		1235
		1236	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1237	U8 m = *p & MINOR_MASK;
		1238	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1239	I8 ilen = incr_len[m];
		1240
		1241	self->incr_need = self->incr_pos + 1;
		1242
		1243	if (ecb_expect_false (ilen < 0))
		1244	{
		1245	if (m != MINOR_INDEF)
		1246	return 1; // error
		1247
		1248	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1249	{
		1250	if (count >= 0)
		1251	return 1; // error
		1252
		1253	count = 1;
		1254	}
		1255	else
		1256	{
		1257	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1258	count = -1;
		1259	}
		1260	}
		1261	else
		1262	{
		1263	self->incr_need += ilen;
		1264	if (ecb_expect_false (self->incr_need > cur))
		1265	return 0;
		1266
		1267	int major = *p >> MAJOR_SHIFT;
		1268
		1269	switch (major)
		1270	{
		1271	case MAJOR_TAG >> MAJOR_SHIFT:
		1272	++count; // tags merely prefix another value
		1273	break;
		1274
		1275	case MAJOR_BYTES >> MAJOR_SHIFT:
		1276	case MAJOR_TEXT >> MAJOR_SHIFT:
		1277	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1278	case MAJOR_MAP >> MAJOR_SHIFT:
		1279	{
		1280	UV len;
		1281
		1282	if (ecb_expect_false (ilen))
		1283	{
		1284	len = 0;
		1285
		1286	do {
		1287	len = (len << 8) | *++p;
		1288	} while (--ilen);
		1289	}
		1290	else
		1291	len = m;
		1292
		1293	switch (major)
		1294	{
		1295	case MAJOR_BYTES >> MAJOR_SHIFT:
		1296	case MAJOR_TEXT >> MAJOR_SHIFT:
		1297	self->incr_need += len;
		1298	if (ecb_expect_false (self->incr_need > cur))
		1299	return 0;
		1300
		1301	break;
		1302
		1303	case MAJOR_MAP >> MAJOR_SHIFT:
		1304	len <<= 1;
		1305	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1306	if (len)
		1307	{
		1308	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1309	count = len + 1;
		1310	}
		1311	break;
		1312	}
		1313	}
		1314	}
		1315	}
		1316
		1317	self->incr_pos = self->incr_need;
		1318
		1319	if (count > 0)
		1320	{
		1321	while (!--count)
		1322	{
		1323	if (!AvFILLp (self->incr_count))
		1324	return 1; // done
		1325
		1326	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1327	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1328	}
		1329
		1330	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1331	}
		1332	}
		1333
		1334	return 0;
		1335	}
		1336
		1337
825	/////////////////////////////////////////////////////////////////////////////	1338	/////////////////////////////////////////////////////////////////////////////
826	// XS interface functions	1339	// XS interface functions
827		1340
828	MODULE = CBOR::XS PACKAGE = CBOR::XS	1341	MODULE = CBOR::XS PACKAGE = CBOR::XS
829		1342
830	BOOT:	1343	BOOT:
831	{	1344	{
832	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1345	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);	1346	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
835		1347
836	cbor_true = get_bool ("CBOR::XS::true");	1348	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
837	cbor_false = get_bool ("CBOR::XS::false");	1349	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1350
		1351	types_true = get_bool ("Types::Serialiser::true" );
		1352	types_false = get_bool ("Types::Serialiser::false");
		1353	types_error = get_bool ("Types::Serialiser::error");
		1354
		1355	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1356
		1357	sv_cbor = newSVpv ("CBOR", 0);
		1358	SvREADONLY_on (sv_cbor);
838	}	1359	}
839		1360
840	PROTOTYPES: DISABLE	1361	PROTOTYPES: DISABLE
841		1362
842	void CLONE (...)	1363	void CLONE (...)
843	CODE:	1364	CODE:
844	cbor_stash = 0;	1365	cbor_stash = 0;
845	cbor_boolean_stash = 0;
846	cbor_tagged_stash = 0;	1366	cbor_tagged_stash = 0;
		1367	types_error_stash = 0;
		1368	types_boolean_stash = 0;
847		1369
848	void new (char *klass)	1370	void new (char *klass)
849	PPCODE:	1371	PPCODE:
850	{	1372	{
851	SV *pv = NEWSV (0, sizeof (CBOR));	1373	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
859		1381
860	void shrink (CBOR *self, int enable = 1)	1382	void shrink (CBOR *self, int enable = 1)
861	ALIAS:	1383	ALIAS:
862	shrink = F_SHRINK	1384	shrink = F_SHRINK
863	allow_unknown = F_ALLOW_UNKNOWN	1385	allow_unknown = F_ALLOW_UNKNOWN
		1386	allow_sharing = F_ALLOW_SHARING
		1387	allow_cycles = F_ALLOW_CYCLES
		1388	pack_strings = F_PACK_STRINGS
		1389	validate_utf8 = F_VALIDATE_UTF8
864	PPCODE:	1390	PPCODE:
865	{	1391	{
866	if (enable)	1392	if (enable)
867	self->flags |= ix;	1393	self->flags |= ix;
868	else	1394	else
…		…
873		1399
874	void get_shrink (CBOR *self)	1400	void get_shrink (CBOR *self)
875	ALIAS:	1401	ALIAS:
876	get_shrink = F_SHRINK	1402	get_shrink = F_SHRINK
877	get_allow_unknown = F_ALLOW_UNKNOWN	1403	get_allow_unknown = F_ALLOW_UNKNOWN
		1404	get_allow_sharing = F_ALLOW_SHARING
		1405	get_allow_cycles = F_ALLOW_CYCLES
		1406	get_pack_strings = F_PACK_STRINGS
		1407	get_validate_utf8 = F_VALIDATE_UTF8
878	PPCODE:	1408	PPCODE:
879	XPUSHs (boolSV (self->flags & ix));	1409	XPUSHs (boolSV (self->flags & ix));
880		1410
881	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1411	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
882	PPCODE:	1412	PPCODE:
…		…
898	CODE:	1428	CODE:
899	RETVAL = self->max_size;	1429	RETVAL = self->max_size;
900	OUTPUT:	1430	OUTPUT:
901	RETVAL	1431	RETVAL
902		1432
903	#if 0 //TODO	1433	void filter (CBOR *self, SV *filter = 0)
904
905	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
906	PPCODE:	1434	PPCODE:
907	{
908	SvREFCNT_dec (self->cb_object);	1435	SvREFCNT_dec (self->filter);
909	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1436	self->filter = filter ? newSVsv (filter) : filter;
910
911	XPUSHs (ST (0));	1437	XPUSHs (ST (0));
912	}
913		1438
914	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1439	SV *get_filter (CBOR *self)
915	PPCODE:	1440	CODE:
916	{	1441	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
917	if (!self->cb_sk_object)	1442	OUTPUT:
918	self->cb_sk_object = newHV ();	1443	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		1444
938	void encode (CBOR *self, SV *scalar)	1445	void encode (CBOR *self, SV *scalar)
939	PPCODE:	1446	PPCODE:
940	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1447	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
941	XPUSHs (scalar);	1448	XPUSHs (scalar);
…		…
954	EXTEND (SP, 2);	1461	EXTEND (SP, 2);
955	PUSHs (sv);	1462	PUSHs (sv);
956	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1463	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
957	}	1464	}
958		1465
959	#if 0	1466	void incr_parse (CBOR *self, SV *cborstr)
		1467	ALIAS:
		1468	incr_parse_multiple = 1
		1469	PPCODE:
		1470	{
		1471	if (SvUTF8 (cborstr))
		1472	sv_utf8_downgrade (cborstr, 0);
		1473
		1474	if (!self->incr_count)
		1475	{
		1476	self->incr_count = newAV ();
		1477	self->incr_pos = 0;
		1478	self->incr_need = 1;
		1479
		1480	av_push (self->incr_count, newSViv (1));
		1481	}
		1482
		1483	do
		1484	{
		1485	if (!incr_parse (self, cborstr))
		1486	{
		1487	if (self->incr_need > self->max_size && self->max_size)
		1488	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1489	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1490
		1491	break;
		1492	}
		1493
		1494	SV *sv;
		1495	char *offset;
		1496
		1497	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1498	XPUSHs (sv);
		1499
		1500	sv_chop (cborstr, offset);
		1501
		1502	av_clear (self->incr_count);
		1503	av_push (self->incr_count, newSViv (1));
		1504
		1505	self->incr_pos = 0;
		1506	self->incr_need = self->incr_pos + 1;
		1507	}
		1508	while (ix);
		1509	}
		1510
		1511	void incr_reset (CBOR *self)
		1512	CODE:
		1513	{
		1514	SvREFCNT_dec (self->incr_count);
		1515	self->incr_count = 0;
		1516	}
960		1517
961	void DESTROY (CBOR *self)	1518	void DESTROY (CBOR *self)
962	CODE:	1519	PPCODE:
963	SvREFCNT_dec (self->cb_sk_object);	1520	cbor_free (self);
964	SvREFCNT_dec (self->cb_object);
965
966	#endif
967		1521
968	PROTOTYPES: ENABLE	1522	PROTOTYPES: ENABLE
969		1523
970	void encode_cbor (SV *scalar)	1524	void encode_cbor (SV *scalar)
		1525	ALIAS:
		1526	encode_cbor = 0
		1527	encode_cbor_sharing = F_ALLOW_SHARING
971	PPCODE:	1528	PPCODE:
972	{	1529	{
973	CBOR cbor;	1530	CBOR cbor;
974	cbor_init (&cbor);	1531	cbor_init (&cbor);
		1532	cbor.flags |= ix;
975	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1533	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
976	XPUSHs (scalar);	1534	XPUSHs (scalar);
977	}	1535	}
978		1536
979	void decode_cbor (SV *cborstr)	1537	void decode_cbor (SV *cborstr)

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