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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.18 by root, Wed Nov 20 01:09:46 2013 UTC vs.
Revision 1.59 by root, Fri Nov 25 23:37:27 2016 UTC

…		…
7	#include <stdlib.h>	7	#include <stdlib.h>
8	#include <stdio.h>	8	#include <stdio.h>
9	#include <limits.h>	9	#include <limits.h>
10	#include <float.h>	10	#include <float.h>
11		11
		12	#define ECB_NO_THREADS 1
12	#include "ecb.h"	13	#include "ecb.h"
13		14
14	// compatibility with perl <5.18	15	// compatibility with perl <5.18
15	#ifndef HvNAMELEN_get	16	#ifndef HvNAMELEN_get
16	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))	17	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
…		…
19	# define HvNAMELEN(hv) HvNAMELEN_get (hv)	20	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
20	#endif	21	#endif
21	#ifndef HvNAMEUTF8	22	#ifndef HvNAMEUTF8
22	# define HvNAMEUTF8(hv) 0	23	# define HvNAMEUTF8(hv) 0
23	#endif	24	#endif
		25	#ifndef SvREFCNT_dec_NN
		26	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		27	#endif
		28
		29	// known major and minor types
		30	enum cbor_type
		31	{
		32	MAJOR_SHIFT = 5,
		33	MINOR_MASK = 0x1f,
		34
		35	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		36	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		37	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		38	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		39	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		40	MAJOR_MAP = 5 << MAJOR_SHIFT,
		41	MAJOR_TAG = 6 << MAJOR_SHIFT,
		42	MAJOR_MISC = 7 << MAJOR_SHIFT,
		43
		44	// INT/STRING/ARRAY/MAP subtypes
		45	LENGTH_EXT1 = 24,
		46	LENGTH_EXT2 = 25,
		47	LENGTH_EXT4 = 26,
		48	LENGTH_EXT8 = 27,
		49
		50	// SIMPLE types (effectively MISC subtypes)
		51	SIMPLE_FALSE = 20,
		52	SIMPLE_TRUE = 21,
		53	SIMPLE_NULL = 22,
		54	SIMPLE_UNDEF = 23,
		55
		56	// MISC subtype (unused)
		57	MISC_EXT1 = 24,
		58	MISC_FLOAT16 = 25,
		59	MISC_FLOAT32 = 26,
		60	MISC_FLOAT64 = 27,
		61
		62	// BYTES/TEXT/ARRAY/MAP
		63	MINOR_INDEF = 31,
		64	};
24		65
25	// known tags	66	// known tags
26	enum cbor_tag	67	enum cbor_tag
27	{	68	{
28	// inofficial extensions (pending iana registration)	69	// extensions
		70	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
29	CBOR_TAG_PERL_OBJECT = 24, // http://cbor.schmorp.de/perl-object	71	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
30	CBOR_TAG_GENERIC_OBJECT = 25, // http://cbor.schmorp.de/generic-object	72	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
31	CBOR_TAG_VALUE_SHARABLE = 26, // http://cbor.schmorp.de/value-sharing	73	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
32	CBOR_TAG_VALUE_SHAREDREF = 27, // http://cbor.schmorp.de/value-sharing	74	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
33	CBOR_TAG_STRINGREF_NAMESPACE = 65537, // http://cbor.schmorp.de/stringref	75	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
34	CBOR_TAG_STRINGREF = 28, // http://cbor.schmorp.de/stringref
35	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection	76	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
36		77
37	// rfc7049	78	// rfc7049
38	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	79	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
39	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	80	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
40	CBOR_TAG_POS_BIGNUM = 2, // byte string	81	CBOR_TAG_POS_BIGNUM = 2, // byte string
41	CBOR_TAG_NEG_BIGNUM = 3, // byte string	82	CBOR_TAG_NEG_BIGNUM = 3, // byte string
42	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	83	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
43	CBOR_TAG_BIGFLOAT = 5, // array	84	CBOR_TAG_BIGFLOAT = 5, // array
44		85
45	CBOR_TAG_CONV_B64U = 21, // base64url, any	86	CBOR_TAG_CONV_B64U = 21, // base64url, any
46	CBOR_TAG_CONV_B64 = 22, // base64, any	87	CBOR_TAG_CONV_B64 = 22, // base64, any
47	CBOR_TAG_CONV_HEX = 23, // base16, any	88	CBOR_TAG_CONV_HEX = 23, // base16, any
48	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	89	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
49		90
50	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	91	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
51	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	92	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
52	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	93	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
53	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	94	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
54	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	95	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
55		96
56	CBOR_TAG_MAGIC = 55799 // self-describe cbor	97	CBOR_TAG_MAGIC = 55799, // self-describe cbor
57	};	98	};
58		99
59	#define F_SHRINK 0x00000001UL	100	#define F_SHRINK 0x00000001UL
60	#define F_ALLOW_UNKNOWN 0x00000002UL	101	#define F_ALLOW_UNKNOWN 0x00000002UL
61	#define F_ALLOW_SHARING 0x00000004UL //TODO	102	#define F_ALLOW_SHARING 0x00000004UL
		103	#define F_ALLOW_CYCLES 0x00000008UL
62	#define F_DEDUP_STRINGS 0x00000008UL //TODO	104	#define F_PACK_STRINGS 0x00000010UL
63	#define F_DEDUP_KEYS 0x00000010UL //TODO	105	#define F_TEXT_KEYS 0x00000020UL
		106	#define F_TEXT_STRINGS 0x00000040UL
		107	#define F_VALIDATE_UTF8 0x00000080UL
64		108
65	#define INIT_SIZE 32 // initial scalar size to be allocated	109	#define INIT_SIZE 32 // initial scalar size to be allocated
66		110
67	#define SB do {	111	#define SB do {
68	#define SE } while (0)	112	#define SE } while (0)
…		…
80	# define CBOR_SLOW 0	124	# define CBOR_SLOW 0
81	# define CBOR_STASH cbor_stash	125	# define CBOR_STASH cbor_stash
82	#endif	126	#endif
83		127
84	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::	128	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
85	static SV *types_true, *types_false, *types_error, *sv_cbor;	129	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
86		130
87	typedef struct {	131	typedef struct {
88	U32 flags;	132	U32 flags;
89	U32 max_depth;	133	U32 max_depth;
90	STRLEN max_size;	134	STRLEN max_size;
		135	SV *filter;
		136
		137	// for the incremental parser
		138	STRLEN incr_pos; // the current offset into the text
		139	STRLEN incr_need; // minimum bytes needed to decode
		140	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
91	} CBOR;	141	} CBOR;
92		142
93	ecb_inline void	143	ecb_inline void
94	cbor_init (CBOR *cbor)	144	cbor_init (CBOR *cbor)
95	{	145	{
96	Zero (cbor, 1, CBOR);	146	Zero (cbor, 1, CBOR);
97	cbor->max_depth = 512;	147	cbor->max_depth = 512;
		148	}
		149
		150	ecb_inline void
		151	cbor_free (CBOR *cbor)
		152	{
		153	SvREFCNT_dec (cbor->filter);
		154	SvREFCNT_dec (cbor->incr_count);
98	}	155	}
99		156
100	/////////////////////////////////////////////////////////////////////////////	157	/////////////////////////////////////////////////////////////////////////////
101	// utility functions	158	// utility functions
102		159
…		…
124	SvPV_renew (sv, SvCUR (sv) + 1);	181	SvPV_renew (sv, SvCUR (sv) + 1);
125	#endif	182	#endif
126	}	183	}
127	}	184	}
128		185
		186	// minimum length of a string to be registered for stringref
		187	ecb_inline int
		188	minimum_string_length (UV idx)
		189	{
		190	return idx > 23
		191	? idx > 0xffU
		192	? idx > 0xffffU
		193	? idx > 0xffffffffU
		194	? 11
		195	: 7
		196	: 5
		197	: 4
		198	: 3;
		199	}
		200
129	/////////////////////////////////////////////////////////////////////////////	201	/////////////////////////////////////////////////////////////////////////////
130	// encoder	202	// encoder
131		203
132	// structure used for encoding CBOR	204	// structure used for encoding CBOR
133	typedef struct	205	typedef struct
…		…
135	char *cur; // SvPVX (sv) + current output position	207	char *cur; // SvPVX (sv) + current output position
136	char *end; // SvEND (sv)	208	char *end; // SvEND (sv)
137	SV *sv; // result scalar	209	SV *sv; // result scalar
138	CBOR cbor;	210	CBOR cbor;
139	U32 depth; // recursion level	211	U32 depth; // recursion level
140	HV *stringref; // string => index, or 0	212	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		213	UV stringref_idx;
141	HV *sharable; // ptr => index, or 0	214	HV *shareable; // ptr => index, or 0
142	HV *sharable_idx;	215	UV shareable_idx;
143	} enc_t;	216	} enc_t;
144		217
145	ecb_inline void	218	ecb_inline void
146	need (enc_t *enc, STRLEN len)	219	need (enc_t *enc, STRLEN len)
147	{	220	{
…		…
164	static void	237	static void
165	encode_uint (enc_t *enc, int major, UV len)	238	encode_uint (enc_t *enc, int major, UV len)
166	{	239	{
167	need (enc, 9);	240	need (enc, 9);
168		241
169	if (len < 24)	242	if (ecb_expect_true (len < LENGTH_EXT1))
170	*enc->cur++ = major | len;	243	*enc->cur++ = major | len;
171	else if (len <= 0xff)	244	else if (ecb_expect_true (len <= 0xffU))
172	{	245	{
173	*enc->cur++ = major | 24;	246	*enc->cur++ = major | LENGTH_EXT1;
174	*enc->cur++ = len;	247	*enc->cur++ = len;
175	}	248	}
176	else if (len <= 0xffff)	249	else if (len <= 0xffffU)
177	{	250	{
178	*enc->cur++ = major | 25;	251	*enc->cur++ = major | LENGTH_EXT2;
179	*enc->cur++ = len >> 8;	252	*enc->cur++ = len >> 8;
180	*enc->cur++ = len;	253	*enc->cur++ = len;
181	}	254	}
182	else if (len <= 0xffffffff)	255	else if (len <= 0xffffffffU)
183	{	256	{
184	*enc->cur++ = major | 26;	257	*enc->cur++ = major | LENGTH_EXT4;
185	*enc->cur++ = len >> 24;	258	*enc->cur++ = len >> 24;
186	*enc->cur++ = len >> 16;	259	*enc->cur++ = len >> 16;
187	*enc->cur++ = len >> 8;	260	*enc->cur++ = len >> 8;
188	*enc->cur++ = len;	261	*enc->cur++ = len;
189	}	262	}
190	else	263	else
191	{	264	{
192	*enc->cur++ = major | 27;	265	*enc->cur++ = major | LENGTH_EXT8;
193	*enc->cur++ = len >> 56;	266	*enc->cur++ = len >> 56;
194	*enc->cur++ = len >> 48;	267	*enc->cur++ = len >> 48;
195	*enc->cur++ = len >> 40;	268	*enc->cur++ = len >> 40;
196	*enc->cur++ = len >> 32;	269	*enc->cur++ = len >> 32;
197	*enc->cur++ = len >> 24;	270	*enc->cur++ = len >> 24;
…		…
199	*enc->cur++ = len >> 8;	272	*enc->cur++ = len >> 8;
200	*enc->cur++ = len;	273	*enc->cur++ = len;
201	}	274	}
202	}	275	}
203		276
204	static void	277	ecb_inline void
		278	encode_tag (enc_t *enc, UV tag)
		279	{
		280	encode_uint (enc, MAJOR_TAG, tag);
		281	}
		282
		283	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		284	ecb_noinline static void
205	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	285	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
206	{	286	{
207	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	287	STRLEN ulen = len;
		288	U8 *p, *pend = (U8 *)str + len;
		289
		290	for (p = (U8 *)str; p < pend; ++p)
		291	ulen += *p >> 7; // count set high bits
		292
		293	encode_uint (enc, MAJOR_TEXT, ulen);
		294
		295	need (enc, ulen);
		296	for (p = (U8 *)str; p < pend; ++p)
		297	if (*p < 0x80)
		298	*enc->cur++ = *p;
		299	else
		300	{
		301	*enc->cur++ = 0xc0 + (*p >> 6);
		302	*enc->cur++ = 0x80 + (*p & 63);
		303	}
		304	}
		305
		306	ecb_inline void
		307	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		308	{
		309	if (ecb_expect_false (upgrade_utf8))
		310	if (!utf8)
		311	{
		312	encode_str_utf8 (enc, utf8, str, len);
		313	return;
		314	}
		315
		316	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
208	need (enc, len);	317	need (enc, len);
209	memcpy (enc->cur, str, len);	318	memcpy (enc->cur, str, len);
210	enc->cur += len;	319	enc->cur += len;
211	}	320	}
212		321
213	ecb_inline void	322	ecb_inline void
214	encode_tag (enc_t *enc, UV tag)	323	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
215	{	324	{
216	encode_uint (enc, 0xc0, tag);	325	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
217	}	326	{
		327	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
218		328
219	static int
220	encode_sharable2 (enc_t *enc, SV *sv)
221	{
222	if (!enc->sharable)
223	enc->sharable = (HV *)sv_2mortal ((SV *)newHV ());
224
225	SV **svp = hv_fetch (enc->sharable, &sv, sizeof (sv), 1);
226
227	if (SvOK (*svp))	329	if (SvOK (*svp))
228	{	330	{
		331	// already registered, use stringref
229	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);	332	encode_tag (enc, CBOR_TAG_STRINGREF);
230	encode_uint (enc, 0x00, SvUV (*svp));	333	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
231
232	return 1;	334	return;
233	}	335	}
234	else	336	else if (len >= minimum_string_length (enc->stringref_idx))
235	{	337	{
		338	// register only
236	sv_setuv (*svp, enc->sharable_idx++);	339	sv_setuv (*svp, enc->stringref_idx);
237	encode_tag (enc, CBOR_TAG_VALUE_SHARABLE);	340	++enc->stringref_idx;
238		341	}
239	return 0;
240	}	342	}
241	}
242		343
243	ecb_inline int	344	encode_str (enc, upgrade_utf8, utf8, str, len);
244	encode_sharable (enc_t *enc, SV *sv)
245	{
246	if (ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING)
247	&& ecb_expect_false (SvREFCNT (sv) > 1))
248	return encode_sharable2 (enc, sv);
249
250	return 0;
251	}	345	}
252		346
253	static void encode_sv (enc_t *enc, SV *sv);	347	static void encode_sv (enc_t *enc, SV *sv);
254		348
255	static void	349	static void
…		…
260	if (enc->depth >= enc->cbor.max_depth)	354	if (enc->depth >= enc->cbor.max_depth)
261	croak (ERR_NESTING_EXCEEDED);	355	croak (ERR_NESTING_EXCEEDED);
262		356
263	++enc->depth;	357	++enc->depth;
264		358
265	encode_uint (enc, 0x80, len + 1);	359	encode_uint (enc, MAJOR_ARRAY, len + 1);
266		360
		361	if (SvMAGICAL (av))
267	for (i = 0; i <= len; ++i)	362	for (i = 0; i <= len; ++i)
268	{	363	{
269	SV **svp = av_fetch (av, i, 0);	364	SV **svp = av_fetch (av, i, 0);
270	encode_sv (enc, svp ? *svp : &PL_sv_undef);	365	encode_sv (enc, svp ? *svp : &PL_sv_undef);
271	}	366	}
		367	else
		368	for (i = 0; i <= len; ++i)
		369	{
		370	SV *sv = AvARRAY (av)[i];
		371	encode_sv (enc, sv ? sv : &PL_sv_undef);
		372	}
272		373
273	--enc->depth;	374	--enc->depth;
274	}	375	}
275		376
276	static void	377	static void
…		…
285		386
286	int pairs = hv_iterinit (hv);	387	int pairs = hv_iterinit (hv);
287	int mg = SvMAGICAL (hv);	388	int mg = SvMAGICAL (hv);
288		389
289	if (mg)	390	if (mg)
290	encode_ch (enc, 0xa0 | 31);	391	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
291	else	392	else
292	encode_uint (enc, 0xa0, pairs);	393	encode_uint (enc, MAJOR_MAP, pairs);
293		394
294	while ((he = hv_iternext (hv)))	395	while ((he = hv_iternext (hv)))
295	{	396	{
296	if (HeKLEN (he) == HEf_SVKEY)	397	if (HeKLEN (he) == HEf_SVKEY)
297	encode_sv (enc, HeSVKEY (he));	398	encode_sv (enc, HeSVKEY (he));
298	else	399	else
299	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	400	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
300		401
301	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	402	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
302	}	403	}
303		404
304	if (mg)	405	if (mg)
305	encode_ch (enc, 0xe0 | 31);	406	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
306		407
307	--enc->depth;	408	--enc->depth;
308	}	409	}
309		410
310	// encode objects, arrays and special \0=false and \1=true values.	411	// encode objects, arrays and special \0=false and \1=true values.
311	static void	412	static void
312	encode_rv (enc_t *enc, SV *sv)	413	encode_rv (enc_t *enc, SV *sv)
313	{	414	{
314	svtype svt;
315
316	SvGETMAGIC (sv);	415	SvGETMAGIC (sv);
		416
317	svt = SvTYPE (sv);	417	svtype svt = SvTYPE (sv);
318
319	if (encode_sharable (enc, sv))
320	return;
321		418
322	if (ecb_expect_false (SvOBJECT (sv)))	419	if (ecb_expect_false (SvOBJECT (sv)))
323	{	420	{
324	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash	421	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
325	? types_boolean_stash	422	? types_boolean_stash
…		…
330	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	427	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
331	? cbor_tagged_stash	428	? cbor_tagged_stash
332	: gv_stashpv ("CBOR::XS::Tagged" , 1);	429	: gv_stashpv ("CBOR::XS::Tagged" , 1);
333		430
334	HV *stash = SvSTASH (sv);	431	HV *stash = SvSTASH (sv);
335	GV *method;
336		432
337	if (stash == boolean_stash)	433	if (stash == boolean_stash)
338	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	434	{
		435	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		436	return;
		437	}
339	else if (stash == error_stash)	438	else if (stash == error_stash)
340	encode_ch (enc, 0xe0 | 23);	439	{
		440	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		441	return;
		442	}
341	else if (stash == tagged_stash)	443	else if (stash == tagged_stash)
342	{	444	{
343	if (svt != SVt_PVAV)	445	if (svt != SVt_PVAV)
344	croak ("encountered CBOR::XS::Tagged object that isn't an array");	446	croak ("encountered CBOR::XS::Tagged object that isn't an array");
345		447
346	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	448	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
347	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));	449	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		450
		451	return;
		452	}
		453	}
		454
		455	if (ecb_expect_false (SvREFCNT (sv) > 1)
		456	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		457	{
		458	if (!enc->shareable)
		459	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		460
		461	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		462
		463	if (SvOK (*svp))
348	}	464	{
		465	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		466	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		467	return;
		468	}
		469	else
		470	{
		471	sv_setuv (*svp, enc->shareable_idx);
		472	++enc->shareable_idx;
		473	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		474	}
		475	}
		476
		477	if (ecb_expect_false (SvOBJECT (sv)))
		478	{
		479	HV *stash = SvSTASH (sv);
		480	GV *method;
		481
349	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))	482	if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
350	{	483	{
351	dSP;	484	dSP;
352		485
353	ENTER; SAVETMPS; PUSHMARK (SP);	486	ENTER; SAVETMPS;
		487	PUSHMARK (SP);
354	// we re-bless the reference to get overload and other niceties right	488	// we re-bless the reference to get overload and other niceties right
355	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	489	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
356		490
357	PUTBACK;	491	PUTBACK;
358	// G_SCALAR ensures that return value is 1	492	// G_SCALAR ensures that return value is 1
…		…
371	}	505	}
372	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)	506	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
373	{	507	{
374	dSP;	508	dSP;
375		509
376	ENTER; SAVETMPS; PUSHMARK (SP);	510	ENTER; SAVETMPS;
		511	SAVESTACK_POS ();
		512	PUSHMARK (SP);
377	EXTEND (SP, 2);	513	EXTEND (SP, 2);
378	// we re-bless the reference to get overload and other niceties right	514	// we re-bless the reference to get overload and other niceties right
379	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	515	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
380	PUSHs (sv_cbor);	516	PUSHs (sv_cbor);
381		517
…		…
386	// catch this surprisingly common error	522	// catch this surprisingly common error
387	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)	523	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
388	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));	524	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
389		525
390	encode_tag (enc, CBOR_TAG_PERL_OBJECT);	526	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
391	encode_uint (enc, 0x80, count + 1);	527	encode_uint (enc, MAJOR_ARRAY, count + 1);
392	encode_str (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));	528	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
393		529
394	while (count)	530	while (count)
395	encode_sv (enc, SP[1 - count--]);	531	encode_sv (enc, SP[1 - count--]);
396		532
397	PUTBACK;	533	PUTBACK;
…		…
418	{	554	{
419	double nv = SvNVX (sv);	555	double nv = SvNVX (sv);
420		556
421	need (enc, 9);	557	need (enc, 9);
422		558
423	if (ecb_expect_false (nv == (U32)nv))	559	if (ecb_expect_false (nv == (NV)(U32)nv))
424	encode_uint (enc, 0x00, (U32)nv);	560	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
425	//TODO: maybe I32?	561	//TODO: maybe I32?
426	else if (ecb_expect_false (nv == (float)nv))	562	else if (ecb_expect_false (nv == (float)nv))
427	{	563	{
428	uint32_t fp = ecb_float_to_binary32 (nv);	564	uint32_t fp = ecb_float_to_binary32 (nv);
429		565
430	*enc->cur++ = 0xe0 | 26;	566	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
431		567
432	if (!ecb_big_endian ())	568	if (!ecb_big_endian ())
433	fp = ecb_bswap32 (fp);	569	fp = ecb_bswap32 (fp);
434		570
435	memcpy (enc->cur, &fp, 4);	571	memcpy (enc->cur, &fp, 4);
…		…
437	}	573	}
438	else	574	else
439	{	575	{
440	uint64_t fp = ecb_double_to_binary64 (nv);	576	uint64_t fp = ecb_double_to_binary64 (nv);
441		577
442	*enc->cur++ = 0xe0 | 27;	578	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
443		579
444	if (!ecb_big_endian ())	580	if (!ecb_big_endian ())
445	fp = ecb_bswap64 (fp);	581	fp = ecb_bswap64 (fp);
446		582
447	memcpy (enc->cur, &fp, 8);	583	memcpy (enc->cur, &fp, 8);
…		…
452	static void	588	static void
453	encode_sv (enc_t *enc, SV *sv)	589	encode_sv (enc_t *enc, SV *sv)
454	{	590	{
455	SvGETMAGIC (sv);	591	SvGETMAGIC (sv);
456		592
457	if (encode_sharable (enc, sv))
458	return;
459
460	if (SvPOKp (sv))	593	if (SvPOKp (sv))
461	{	594	{
462	STRLEN len;	595	STRLEN len;
463	char *str = SvPV (sv, len);	596	char *str = SvPV (sv, len);
464	encode_str (enc, SvUTF8 (sv), str, len);	597	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
465	}	598	}
466	else if (SvNOKp (sv))	599	else if (SvNOKp (sv))
467	encode_nv (enc, sv);	600	encode_nv (enc, sv);
468	else if (SvIOKp (sv))	601	else if (SvIOKp (sv))
469	{	602	{
470	if (SvIsUV (sv))	603	if (SvIsUV (sv))
471	encode_uint (enc, 0x00, SvUVX (sv));	604	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
472	else if (SvIVX (sv) >= 0)	605	else if (SvIVX (sv) >= 0)
473	encode_uint (enc, 0x00, SvIVX (sv));	606	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
474	else	607	else
475	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	608	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
476	}	609	}
477	else if (SvROK (sv))	610	else if (SvROK (sv))
478	encode_rv (enc, SvRV (sv));	611	encode_rv (enc, SvRV (sv));
479	else if (!SvOK (sv))	612	else if (!SvOK (sv))
480	encode_ch (enc, 0xe0 | 22);	613	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
481	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	614	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
482	encode_ch (enc, 0xe0 | 23);	615	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
483	else	616	else
484	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	617	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
485	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	618	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
486	}	619	}
487		620
488	static SV *	621	static SV *
489	encode_cbor (SV *scalar, CBOR *cbor)	622	encode_cbor (SV *scalar, CBOR *cbor)
490	{	623	{
491	enc_t enc = { };	624	enc_t enc = { 0 };
492		625
493	enc.cbor = *cbor;	626	enc.cbor = *cbor;
494	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	627	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
495	enc.cur = SvPVX (enc.sv);	628	enc.cur = SvPVX (enc.sv);
496	enc.end = SvEND (enc.sv);	629	enc.end = SvEND (enc.sv);
497		630
498	SvPOK_only (enc.sv);	631	SvPOK_only (enc.sv);
		632
		633	if (cbor->flags & F_PACK_STRINGS)
		634	{
		635	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		636	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		637	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		638	}
		639
499	encode_sv (&enc, scalar);	640	encode_sv (&enc, scalar);
500		641
501	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	642	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
502	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	643	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
503		644
…		…
517	U8 *end; // end of input string	658	U8 *end; // end of input string
518	const char *err; // parse error, if != 0	659	const char *err; // parse error, if != 0
519	CBOR cbor;	660	CBOR cbor;
520	U32 depth; // recursion depth	661	U32 depth; // recursion depth
521	U32 maxdepth; // recursion depth limit	662	U32 maxdepth; // recursion depth limit
522	AV *sharable;	663	AV *shareable;
		664	AV *stringref;
		665	SV *decode_tagged;
		666	SV *err_sv; // optional sv for error, needs to be freed
523	} dec_t;	667	} dec_t;
524		668
525	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	669	// set dec->err to ERRSV
		670	ecb_cold static void
		671	err_errsv (dec_t *dec)
		672	{
		673	if (!dec->err)
		674	{
		675	dec->err_sv = newSVsv (ERRSV);
526		676
527	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	677	// chop off the trailing \n
		678	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		679	*SvEND (dec->err_sv) = 0;
528		680
		681	dec->err = SvPVutf8_nolen (dec->err_sv);
		682	}
		683	}
		684
		685	// the following functions are used to reduce code size and help the compiler to optimise
		686	ecb_cold static void
		687	err_set (dec_t *dec, const char *reason)
		688	{
		689	if (!dec->err)
		690	dec->err = reason;
		691	}
		692
		693	ecb_cold static void
		694	err_unexpected_end (dec_t *dec)
		695	{
		696	err_set (dec, "unexpected end of CBOR data");
		697	}
		698
		699	ecb_cold static void
		700	err_nesting_exceeded (dec_t *dec)
		701	{
		702	err_set (dec, ERR_NESTING_EXCEEDED);
		703	}
		704
		705	#define ERR_DO(do) SB do; goto fail; SE
		706	#define ERR(reason) ERR_DO (err_set (dec, reason))
		707	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		708
		709	#define WANT(len) if (ecb_expect_false ((UV)(dec->end - dec->cur) < (UV)len)) ERR_DO (err_unexpected_end (dec))
		710
529	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	711	#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED)
530	#define DEC_DEC_DEPTH --dec->depth	712	#define DEC_DEC_DEPTH --dec->depth
531		713
532	static UV	714	static UV
533	decode_uint (dec_t *dec)	715	decode_uint (dec_t *dec)
534	{	716	{
535	switch (*dec->cur & 31)	717	U8 m = *dec->cur & MINOR_MASK;
536	{	718	++dec->cur;
537	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
538	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
539	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
540	return *dec->cur++ & 31;
541		719
542	case 24:	720	if (ecb_expect_true (m < LENGTH_EXT1))
		721	return m;
		722	else if (ecb_expect_true (m == LENGTH_EXT1))
		723	{
543	WANT (2);	724	WANT (1);
544	dec->cur += 2;	725	dec->cur += 1;
545	return dec->cur[-1];	726	return dec->cur[-1];
546		727	}
547	case 25:	728	else if (ecb_expect_true (m == LENGTH_EXT2))
		729	{
548	WANT (3);	730	WANT (2);
549	dec->cur += 3;	731	dec->cur += 2;
550	return (((UV)dec->cur[-2]) << 8)	732	return (((UV)dec->cur[-2]) << 8)
551	| ((UV)dec->cur[-1]);	733	| ((UV)dec->cur[-1]);
552		734	}
553	case 26:	735	else if (ecb_expect_true (m == LENGTH_EXT4))
		736	{
554	WANT (5);	737	WANT (4);
555	dec->cur += 5;	738	dec->cur += 4;
556	return (((UV)dec->cur[-4]) << 24)	739	return (((UV)dec->cur[-4]) << 24)
557	| (((UV)dec->cur[-3]) << 16)	740	| (((UV)dec->cur[-3]) << 16)
558	| (((UV)dec->cur[-2]) << 8)	741	| (((UV)dec->cur[-2]) << 8)
559	| ((UV)dec->cur[-1]);	742	| ((UV)dec->cur[-1]);
560		743	}
561	case 27:	744	else if (ecb_expect_true (m == LENGTH_EXT8))
		745	{
562	WANT (9);	746	WANT (8);
563	dec->cur += 9;	747	dec->cur += 8;
		748
		749	return
		750	#if UVSIZE < 8
		751	0
		752	#else
564	return (((UV)dec->cur[-8]) << 56)	753	(((UV)dec->cur[-8]) << 56)
565	| (((UV)dec->cur[-7]) << 48)	754	| (((UV)dec->cur[-7]) << 48)
566	| (((UV)dec->cur[-6]) << 40)	755	| (((UV)dec->cur[-6]) << 40)
567	| (((UV)dec->cur[-5]) << 32)	756	| (((UV)dec->cur[-5]) << 32)
		757	#endif
568	| (((UV)dec->cur[-4]) << 24)	758	| (((UV)dec->cur[-4]) << 24)
569	| (((UV)dec->cur[-3]) << 16)	759	| (((UV)dec->cur[-3]) << 16)
570	| (((UV)dec->cur[-2]) << 8)	760	| (((UV)dec->cur[-2]) << 8)
571	| ((UV)dec->cur[-1]);	761	| ((UV)dec->cur[-1]);
572		762	}
573	default:	763	else
574	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	764	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
575	}
576		765
577	fail:	766	fail:
578	return 0;	767	return 0;
579	}	768	}
580		769
…		…
585	{	774	{
586	AV *av = newAV ();	775	AV *av = newAV ();
587		776
588	DEC_INC_DEPTH;	777	DEC_INC_DEPTH;
589		778
590	if ((*dec->cur & 31) == 31)	779	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
591	{	780	{
592	++dec->cur;	781	++dec->cur;
593		782
594	for (;;)	783	for (;;)
595	{	784	{
596	WANT (1);	785	WANT (1);
597		786
598	if (*dec->cur == (0xe0 | 31))	787	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
599	{	788	{
600	++dec->cur;	789	++dec->cur;
601	break;	790	break;
602	}	791	}
603		792
604	av_push (av, decode_sv (dec));	793	av_push (av, decode_sv (dec));
605	}	794	}
606	}	795	}
607	else	796	else
608	{	797	{
609	int i, len = decode_uint (dec);	798	UV i, len = decode_uint (dec);
610		799
		800	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
611	av_fill (av, len - 1);	801	av_fill (av, len - 1);
612		802
613	for (i = 0; i < len; ++i)	803	for (i = 0; i < len; ++i)
614	AvARRAY (av)[i] = decode_sv (dec);	804	AvARRAY (av)[i] = decode_sv (dec);
615	}	805	}
…		…
625		815
626	static void	816	static void
627	decode_he (dec_t *dec, HV *hv)	817	decode_he (dec_t *dec, HV *hv)
628	{	818	{
629	// for speed reasons, we specialcase single-string	819	// for speed reasons, we specialcase single-string
630	// byte or utf-8 strings as keys.	820	// byte or utf-8 strings as keys, but only when !stringref
631		821
632	if (*dec->cur >= 0x40 && *dec->cur <= 0x40 + 27)	822	if (ecb_expect_true (!dec->stringref))
		823	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
633	{	824	{
634	I32 len = decode_uint (dec);	825	STRLEN len = decode_uint (dec);
635	char *key = (char *)dec->cur;	826	char *key = (char *)dec->cur;
636		827
		828	WANT (len);
637	dec->cur += len;	829	dec->cur += len;
638		830
639	hv_store (hv, key, len, decode_sv (dec), 0);	831	hv_store (hv, key, len, decode_sv (dec), 0);
		832
		833	return;
640	}	834	}
641	else if (*dec->cur >= 0x60 && *dec->cur <= 0x60 + 27)	835	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
642	{	836	{
643	I32 len = decode_uint (dec);	837	STRLEN len = decode_uint (dec);
644	char *key = (char *)dec->cur;	838	char *key = (char *)dec->cur;
645		839
		840	WANT (len);
646	dec->cur += len;	841	dec->cur += len;
647		842
		843	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		844	if (!is_utf8_string (key, len))
		845	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		846
648	hv_store (hv, key, -len, decode_sv (dec), 0);	847	hv_store (hv, key, -len, decode_sv (dec), 0);
		848
		849	return;
649	}	850	}
650	else	851
651	{
652	SV *k = decode_sv (dec);	852	SV *k = decode_sv (dec);
653	SV *v = decode_sv (dec);	853	SV *v = decode_sv (dec);
654		854
		855	// we leak memory if uncaught exceptions are thrown by random magical
		856	// methods, and this is hopefully the only place where it can happen,
		857	// so if there is a chance of an exception, take the very slow path.
		858	// since catching exceptions is "undocumented/internal/forbidden" by
		859	// the new p5p powers, we need to call out to a perl function :/
		860	if (ecb_expect_false (SvAMAGIC (k)))
		861	{
		862	dSP;
		863
		864	ENTER; SAVETMPS;
		865	PUSHMARK (SP);
		866	EXTEND (SP, 3);
		867	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		868	PUSHs (sv_2mortal (k));
		869	PUSHs (sv_2mortal (v));
		870
		871	PUTBACK;
		872	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		873	SPAGAIN;
		874
		875	FREETMPS; LEAVE;
		876
		877	if (SvTRUE (ERRSV))
		878	ERR_ERRSV;
		879
		880	return;
		881	}
		882
655	hv_store_ent (hv, k, v, 0);	883	hv_store_ent (hv, k, v, 0);
656	SvREFCNT_dec (k);	884	SvREFCNT_dec (k);
657	}	885
		886	fail:
		887	;
658	}	888	}
659		889
660	static SV *	890	static SV *
661	decode_hv (dec_t *dec)	891	decode_hv (dec_t *dec)
662	{	892	{
663	HV *hv = newHV ();	893	HV *hv = newHV ();
664		894
665	DEC_INC_DEPTH;	895	DEC_INC_DEPTH;
666		896
667	if ((*dec->cur & 31) == 31)	897	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
668	{	898	{
669	++dec->cur;	899	++dec->cur;
670		900
671	for (;;)	901	for (;;)
672	{	902	{
673	WANT (1);	903	WANT (1);
674		904
675	if (*dec->cur == (0xe0 | 31))	905	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
676	{	906	{
677	++dec->cur;	907	++dec->cur;
678	break;	908	break;
679	}	909	}
680		910
681	decode_he (dec, hv);	911	decode_he (dec, hv);
682	}	912	}
683	}	913	}
684	else	914	else
685	{	915	{
686	int pairs = decode_uint (dec);	916	UV pairs = decode_uint (dec);
		917
		918	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
687		919
688	while (pairs--)	920	while (pairs--)
689	decode_he (dec, hv);	921	decode_he (dec, hv);
690	}	922	}
691		923
…		…
701	static SV *	933	static SV *
702	decode_str (dec_t *dec, int utf8)	934	decode_str (dec_t *dec, int utf8)
703	{	935	{
704	SV *sv = 0;	936	SV *sv = 0;
705		937
706	if ((*dec->cur & 31) == 31)	938	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
707	{	939	{
		940	// indefinite length strings
708	++dec->cur;	941	++dec->cur;
709		942
		943	U8 major = *dec->cur & MAJOR_MISC;
		944
710	sv = newSVpvn ("", 0);	945	sv = newSVpvn ("", 0);
711		946
712	// not very fast, and certainly not robust against illegal input
713	for (;;)	947	for (;;)
714	{	948	{
715	WANT (1);	949	WANT (1);
716		950
717	if (*dec->cur == (0xe0 | 31))	951	if ((*dec->cur - major) > LENGTH_EXT8)
		952	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
718	{	953	{
719	++dec->cur;	954	++dec->cur;
720	break;	955	break;
721	}	956	}
		957	else
		958	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
722		959
723	sv_catsv (sv, decode_sv (dec));	960	STRLEN len = decode_uint (dec);
		961
		962	WANT (len);
		963	sv_catpvn (sv, dec->cur, len);
		964	dec->cur += len;
724	}	965	}
725	}	966	}
726	else	967	else
727	{	968	{
728	STRLEN len = decode_uint (dec);	969	STRLEN len = decode_uint (dec);
729		970
730	WANT (len);	971	WANT (len);
731	sv = newSVpvn (dec->cur, len);	972	sv = newSVpvn (dec->cur, len);
732	dec->cur += len;	973	dec->cur += len;
		974
		975	if (ecb_expect_false (dec->stringref)
		976	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		977	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
733	}	978	}
734		979
735	if (utf8)	980	if (utf8)
		981	{
		982	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		983	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		984	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		985
736	SvUTF8_on (sv);	986	SvUTF8_on (sv);
		987	}
737		988
738	return sv;	989	return sv;
739		990
740	fail:	991	fail:
741	SvREFCNT_dec (sv);	992	SvREFCNT_dec (sv);
…		…
743	}	994	}
744		995
745	static SV *	996	static SV *
746	decode_tagged (dec_t *dec)	997	decode_tagged (dec_t *dec)
747	{	998	{
		999	SV *sv = 0;
748	UV tag = decode_uint (dec);	1000	UV tag = decode_uint (dec);
749	SV *sv = decode_sv (dec);	1001
		1002	WANT (1);
750		1003
751	switch (tag)	1004	switch (tag)
752	{	1005	{
753	case CBOR_TAG_MAGIC:	1006	case CBOR_TAG_MAGIC:
754	return sv;	1007	sv = decode_sv (dec);
		1008	break;
755		1009
756	case CBOR_TAG_INDIRECTION:	1010	case CBOR_TAG_INDIRECTION:
757	return newRV_noinc (sv);	1011	sv = newRV_noinc (decode_sv (dec));
		1012	break;
758		1013
		1014	case CBOR_TAG_STRINGREF_NAMESPACE:
		1015	{
		1016	// do nmot use SAVETMPS/FREETMPS, as these will
		1017	// erase mortalised caches, e.g. "shareable"
		1018	ENTER;
		1019
		1020	SAVESPTR (dec->stringref);
		1021	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1022
		1023	sv = decode_sv (dec);
		1024
		1025	LEAVE;
		1026	}
		1027	break;
		1028
		1029	case CBOR_TAG_STRINGREF:
		1030	{
		1031	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1032	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1033
		1034	UV idx = decode_uint (dec);
		1035
		1036	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		1037	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1038
		1039	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1040	}
		1041	break;
		1042
759	case CBOR_TAG_VALUE_SHARABLE:	1043	case CBOR_TAG_VALUE_SHAREABLE:
		1044	{
760	if (ecb_expect_false (!dec->sharable))	1045	if (ecb_expect_false (!dec->shareable))
761	dec->sharable = (AV *)sv_2mortal ((SV *)newAV ());	1046	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
762		1047
		1048	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1049	{
		1050	sv = newSV (0);
763	av_push (dec->sharable, SvREFCNT_inc_NN (sv));	1051	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
764		1052
765	return sv;	1053	SV *osv = decode_sv (dec);
		1054	sv_setsv (sv, osv);
		1055	SvREFCNT_dec_NN (osv);
		1056	}
		1057	else
		1058	{
		1059	av_push (dec->shareable, &PL_sv_undef);
		1060	int idx = AvFILLp (dec->shareable);
		1061	sv = decode_sv (dec);
		1062	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1063	}
		1064	}
		1065	break;
766		1066
767	case CBOR_TAG_VALUE_SHAREDREF:	1067	case CBOR_TAG_VALUE_SHAREDREF:
768	{	1068	{
769	// TODO: should verify that the sv atcually was a CBOR unsigned integer	1069	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
770	UV idx = SvUV (sv);	1070	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
771		1071
		1072	UV idx = decode_uint (dec);
		1073
772	if (!dec->sharable || idx > AvFILLp (dec->sharable))	1074	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
773	ERR ("corrupted CBOR data (sharedref index out of bounds)");	1075	ERR ("corrupted CBOR data (sharedref index out of bounds)");
774		1076
775	SvREFCNT_dec (sv);
776
777	return SvREFCNT_inc_NN (AvARRAY (dec->sharable)[idx]);	1077	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1078
		1079	if (sv == &PL_sv_undef)
		1080	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
778	}	1081	}
		1082	break;
779		1083
780	case CBOR_TAG_PERL_OBJECT:	1084	case CBOR_TAG_PERL_OBJECT:
781	{	1085	{
		1086	sv = decode_sv (dec);
		1087
782	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)	1088	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
783	ERR ("corrupted CBOR data (non-array perl object)");	1089	ERR ("corrupted CBOR data (non-array perl object)");
784		1090
785	AV *av = (AV *)SvRV (sv);	1091	AV *av = (AV *)SvRV (sv);
786	int len = av_len (av) + 1;	1092	int len = av_len (av) + 1;
…		…
794	if (!method)	1100	if (!method)
795	ERR ("cannot decode perl-object (package does not have a THAW method)");	1101	ERR ("cannot decode perl-object (package does not have a THAW method)");
796		1102
797	dSP;	1103	dSP;
798		1104
799	ENTER; SAVETMPS; PUSHMARK (SP);	1105	ENTER; SAVETMPS;
		1106	PUSHMARK (SP);
800	EXTEND (SP, len + 1);	1107	EXTEND (SP, len + 1);
801	// we re-bless the reference to get overload and other niceties right	1108	// we re-bless the reference to get overload and other niceties right
802	PUSHs (*av_fetch (av, 0, 1));	1109	PUSHs (*av_fetch (av, 0, 1));
803	PUSHs (sv_cbor);	1110	PUSHs (sv_cbor);
804		1111
…		…
812	SPAGAIN;	1119	SPAGAIN;
813		1120
814	if (SvTRUE (ERRSV))	1121	if (SvTRUE (ERRSV))
815	{	1122	{
816	FREETMPS; LEAVE;	1123	FREETMPS; LEAVE;
817	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));	1124	ERR_ERRSV;
818	}	1125	}
819		1126
820	SvREFCNT_dec (sv);	1127	SvREFCNT_dec (sv);
821	sv = SvREFCNT_inc (POPs);	1128	sv = SvREFCNT_inc (POPs);
822		1129
823	PUTBACK;	1130	PUTBACK;
824		1131
825	FREETMPS; LEAVE;	1132	FREETMPS; LEAVE;
826
827	return sv;
828	}	1133	}
		1134	break;
829		1135
830	default:	1136	default:
831	{	1137	{
		1138	SV *tag_sv = newSVuv (tag);
		1139
		1140	sv = decode_sv (dec);
		1141
		1142	dSP;
		1143	ENTER; SAVETMPS;
		1144	SAVESTACK_POS ();
		1145	PUSHMARK (SP);
		1146	EXTEND (SP, 2);
		1147	PUSHs (tag_sv);
		1148	PUSHs (sv);
		1149
		1150	PUTBACK;
		1151	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1152	SPAGAIN;
		1153
		1154	if (SvTRUE (ERRSV))
		1155	{
		1156	SvREFCNT_dec (tag_sv);
		1157	FREETMPS; LEAVE;
		1158	ERR_ERRSV;
		1159	}
		1160
		1161	if (count)
		1162	{
		1163	SvREFCNT_dec (tag_sv);
		1164	SvREFCNT_dec (sv);
		1165	sv = SvREFCNT_inc (POPs);
		1166	}
		1167	else
		1168	{
832	AV *av = newAV ();	1169	AV *av = newAV ();
833	av_push (av, newSVuv (tag));	1170	av_push (av, tag_sv);
834	av_push (av, sv);	1171	av_push (av, sv);
835		1172
836	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	1173	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
837	? cbor_tagged_stash	1174	? cbor_tagged_stash
838	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1175	: gv_stashpv ("CBOR::XS::Tagged" , 1);
839
840	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);	1176	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
841	}	1177	}
		1178
		1179	PUTBACK;
		1180
		1181	FREETMPS; LEAVE;
		1182	}
		1183	break;
842	}	1184	}
		1185
		1186	return sv;
843		1187
844	fail:	1188	fail:
845	SvREFCNT_dec (sv);	1189	SvREFCNT_dec (sv);
846	return &PL_sv_undef;	1190	return &PL_sv_undef;
847	}	1191	}
…		…
849	static SV *	1193	static SV *
850	decode_sv (dec_t *dec)	1194	decode_sv (dec_t *dec)
851	{	1195	{
852	WANT (1);	1196	WANT (1);
853		1197
854	switch (*dec->cur >> 5)	1198	switch (*dec->cur >> MAJOR_SHIFT)
855	{	1199	{
856	case 0: // unsigned int	1200	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
857	return newSVuv (decode_uint (dec));	1201	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
858	case 1: // negative int	1202	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
859	return newSViv (-1 - (IV)decode_uint (dec));	1203	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
860	case 2: // octet string	1204	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
861	return decode_str (dec, 0);	1205	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
862	case 3: // utf-8 string	1206	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
863	return decode_str (dec, 1);	1207
864	case 4: // array	1208	case MAJOR_MISC >> MAJOR_SHIFT:
865	return decode_av (dec);
866	case 5: // map
867	return decode_hv (dec);
868	case 6: // tag
869	return decode_tagged (dec);
870	case 7: // misc
871	switch (*dec->cur++ & 31)	1209	switch (*dec->cur++ & MINOR_MASK)
872	{	1210	{
873	case 20:	1211	case SIMPLE_FALSE:
874	#if CBOR_SLOW	1212	#if CBOR_SLOW
875	types_false = get_bool ("Types::Serialiser::false");	1213	types_false = get_bool ("Types::Serialiser::false");
876	#endif	1214	#endif
877	return newSVsv (types_false);	1215	return newSVsv (types_false);
878	case 21:	1216	case SIMPLE_TRUE:
879	#if CBOR_SLOW	1217	#if CBOR_SLOW
880	types_true = get_bool ("Types::Serialiser::true");	1218	types_true = get_bool ("Types::Serialiser::true");
881	#endif	1219	#endif
882	return newSVsv (types_true);	1220	return newSVsv (types_true);
883	case 22:	1221	case SIMPLE_NULL:
884	return newSVsv (&PL_sv_undef);	1222	return newSVsv (&PL_sv_undef);
885	case 23:	1223	case SIMPLE_UNDEF:
886	#if CBOR_SLOW	1224	#if CBOR_SLOW
887	types_error = get_bool ("Types::Serialiser::error");	1225	types_error = get_bool ("Types::Serialiser::error");
888	#endif	1226	#endif
889	return newSVsv (types_error);	1227	return newSVsv (types_error);
890		1228
891	case 25:	1229	case MISC_FLOAT16:
892	{	1230	{
893	WANT (2);	1231	WANT (2);
894		1232
895	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1233	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
896	dec->cur += 2;	1234	dec->cur += 2;
897		1235
898	return newSVnv (ecb_binary16_to_float (fp));	1236	return newSVnv (ecb_binary16_to_float (fp));
899	}	1237	}
900		1238
901	case 26:	1239	case MISC_FLOAT32:
902	{	1240	{
903	uint32_t fp;	1241	uint32_t fp;
904	WANT (4);	1242	WANT (4);
905	memcpy (&fp, dec->cur, 4);	1243	memcpy (&fp, dec->cur, 4);
906	dec->cur += 4;	1244	dec->cur += 4;
…		…
909	fp = ecb_bswap32 (fp);	1247	fp = ecb_bswap32 (fp);
910		1248
911	return newSVnv (ecb_binary32_to_float (fp));	1249	return newSVnv (ecb_binary32_to_float (fp));
912	}	1250	}
913		1251
914	case 27:	1252	case MISC_FLOAT64:
915	{	1253	{
916	uint64_t fp;	1254	uint64_t fp;
917	WANT (8);	1255	WANT (8);
918	memcpy (&fp, dec->cur, 8);	1256	memcpy (&fp, dec->cur, 8);
919	dec->cur += 8;	1257	dec->cur += 8;
…		…
922	fp = ecb_bswap64 (fp);	1260	fp = ecb_bswap64 (fp);
923		1261
924	return newSVnv (ecb_binary64_to_double (fp));	1262	return newSVnv (ecb_binary64_to_double (fp));
925	}	1263	}
926		1264
927	// 0..19 unassigned	1265	// 0..19 unassigned simple
928	// 24 reserved + unassigned (reserved values are not encodable)	1266	// 24 reserved + unassigned simple (reserved values are not encodable)
		1267	// 28-30 unassigned misc
		1268	// 31 break code
929	default:	1269	default:
930	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1270	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
931	}	1271	}
932		1272
933	break;	1273	break;
934	}	1274	}
935		1275
…		…
938	}	1278	}
939		1279
940	static SV *	1280	static SV *
941	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1281	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
942	{	1282	{
943	dec_t dec = { };	1283	dec_t dec = { 0 };
944	SV *sv;	1284	SV *sv;
945	STRLEN len;	1285	STRLEN len;
946	char *data = SvPVbyte (string, len);	1286	char *data = SvPVbyte (string, len);
947		1287
948	if (len > cbor->max_size && cbor->max_size)	1288	if (len > cbor->max_size && cbor->max_size)
…		…
962	if (dec.cur != dec.end && !dec.err)	1302	if (dec.cur != dec.end && !dec.err)
963	dec.err = "garbage after CBOR object";	1303	dec.err = "garbage after CBOR object";
964		1304
965	if (dec.err)	1305	if (dec.err)
966	{	1306	{
		1307	if (dec.shareable)
		1308	{
		1309	// need to break cyclic links, which would all be in shareable
		1310	int i;
		1311	SV **svp;
		1312
		1313	for (i = av_len (dec.shareable) + 1; i--; )
		1314	if ((svp = av_fetch (dec.shareable, i, 0)))
		1315	sv_setsv (*svp, &PL_sv_undef);
		1316	}
		1317
967	SvREFCNT_dec (sv);	1318	SvREFCNT_dec (sv);
		1319
		1320	if (dec.err_sv)
		1321	sv_2mortal (dec.err_sv);
		1322
968	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);	1323	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
969	}	1324	}
970		1325
971	sv = sv_2mortal (sv);	1326	sv = sv_2mortal (sv);
972		1327
973	return sv;	1328	return sv;
974	}	1329	}
975		1330
		1331	/////////////////////////////////////////////////////////////////////////////
		1332	// incremental parser
		1333
		1334	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1335
		1336	// returns 0 for notyet, 1 for success or error
		1337	static int
		1338	incr_parse (CBOR *self, SV *cborstr)
		1339	{
		1340	STRLEN cur;
		1341	SvPV (cborstr, cur);
		1342
		1343	while (ecb_expect_true (self->incr_need <= cur))
		1344	{
		1345	// table of integer count bytes
		1346	static I8 incr_len[MINOR_MASK + 1] = {
		1347	0, 0, 0, 0, 0, 0, 0, 0,
		1348	0, 0, 0, 0, 0, 0, 0, 0,
		1349	0, 0, 0, 0, 0, 0, 0, 0,
		1350	1, 2, 4, 8,-1,-1,-1,-2
		1351	};
		1352
		1353	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1354	U8 m = *p & MINOR_MASK;
		1355	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1356	I8 ilen = incr_len[m];
		1357
		1358	self->incr_need = self->incr_pos + 1;
		1359
		1360	if (ecb_expect_false (ilen < 0))
		1361	{
		1362	if (m != MINOR_INDEF)
		1363	return 1; // error
		1364
		1365	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1366	{
		1367	if (count >= 0)
		1368	return 1; // error
		1369
		1370	count = 1;
		1371	}
		1372	else
		1373	{
		1374	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1375	count = -1;
		1376	}
		1377	}
		1378	else
		1379	{
		1380	self->incr_need += ilen;
		1381	if (ecb_expect_false (self->incr_need > cur))
		1382	return 0;
		1383
		1384	int major = *p >> MAJOR_SHIFT;
		1385
		1386	switch (major)
		1387	{
		1388	case MAJOR_TAG >> MAJOR_SHIFT:
		1389	++count; // tags merely prefix another value
		1390	break;
		1391
		1392	case MAJOR_BYTES >> MAJOR_SHIFT:
		1393	case MAJOR_TEXT >> MAJOR_SHIFT:
		1394	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1395	case MAJOR_MAP >> MAJOR_SHIFT:
		1396	{
		1397	UV len;
		1398
		1399	if (ecb_expect_false (ilen))
		1400	{
		1401	len = 0;
		1402
		1403	do {
		1404	len = (len << 8) | *++p;
		1405	} while (--ilen);
		1406	}
		1407	else
		1408	len = m;
		1409
		1410	switch (major)
		1411	{
		1412	case MAJOR_BYTES >> MAJOR_SHIFT:
		1413	case MAJOR_TEXT >> MAJOR_SHIFT:
		1414	self->incr_need += len;
		1415	if (ecb_expect_false (self->incr_need > cur))
		1416	return 0;
		1417
		1418	break;
		1419
		1420	case MAJOR_MAP >> MAJOR_SHIFT:
		1421	len <<= 1;
		1422	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1423	if (len)
		1424	{
		1425	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1426	count = len + 1;
		1427	}
		1428	break;
		1429	}
		1430	}
		1431	}
		1432	}
		1433
		1434	self->incr_pos = self->incr_need;
		1435
		1436	if (count > 0)
		1437	{
		1438	while (!--count)
		1439	{
		1440	if (!AvFILLp (self->incr_count))
		1441	return 1; // done
		1442
		1443	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1444	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1445	}
		1446
		1447	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1448	}
		1449	}
		1450
		1451	return 0;
		1452	}
		1453
		1454
976	/////////////////////////////////////////////////////////////////////////////	1455	/////////////////////////////////////////////////////////////////////////////
977	// XS interface functions	1456	// XS interface functions
978		1457
979	MODULE = CBOR::XS PACKAGE = CBOR::XS	1458	MODULE = CBOR::XS PACKAGE = CBOR::XS
980		1459
…		…
988		1467
989	types_true = get_bool ("Types::Serialiser::true" );	1468	types_true = get_bool ("Types::Serialiser::true" );
990	types_false = get_bool ("Types::Serialiser::false");	1469	types_false = get_bool ("Types::Serialiser::false");
991	types_error = get_bool ("Types::Serialiser::error");	1470	types_error = get_bool ("Types::Serialiser::error");
992		1471
		1472	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1473
993	sv_cbor = newSVpv ("CBOR", 0);	1474	sv_cbor = newSVpv ("CBOR", 0);
994	SvREADONLY_on (sv_cbor);	1475	SvREADONLY_on (sv_cbor);
		1476
		1477	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
995	}	1478	}
996		1479
997	PROTOTYPES: DISABLE	1480	PROTOTYPES: DISABLE
998		1481
999	void CLONE (...)	1482	void CLONE (...)
…		…
1018	void shrink (CBOR *self, int enable = 1)	1501	void shrink (CBOR *self, int enable = 1)
1019	ALIAS:	1502	ALIAS:
1020	shrink = F_SHRINK	1503	shrink = F_SHRINK
1021	allow_unknown = F_ALLOW_UNKNOWN	1504	allow_unknown = F_ALLOW_UNKNOWN
1022	allow_sharing = F_ALLOW_SHARING	1505	allow_sharing = F_ALLOW_SHARING
1023	dedup_keys = F_DEDUP_KEYS	1506	allow_cycles = F_ALLOW_CYCLES
1024	dedup_strings = F_DEDUP_STRINGS	1507	pack_strings = F_PACK_STRINGS
		1508	text_keys = F_TEXT_KEYS
		1509	text_strings = F_TEXT_STRINGS
		1510	validate_utf8 = F_VALIDATE_UTF8
1025	PPCODE:	1511	PPCODE:
1026	{	1512	{
1027	if (enable)	1513	if (enable)
1028	self->flags |= ix;	1514	self->flags |= ix;
1029	else	1515	else
…		…
1035	void get_shrink (CBOR *self)	1521	void get_shrink (CBOR *self)
1036	ALIAS:	1522	ALIAS:
1037	get_shrink = F_SHRINK	1523	get_shrink = F_SHRINK
1038	get_allow_unknown = F_ALLOW_UNKNOWN	1524	get_allow_unknown = F_ALLOW_UNKNOWN
1039	get_allow_sharing = F_ALLOW_SHARING	1525	get_allow_sharing = F_ALLOW_SHARING
1040	get_dedup_keys = F_DEDUP_KEYS	1526	get_allow_cycles = F_ALLOW_CYCLES
1041	get_dedup_strings = F_DEDUP_STRINGS	1527	get_pack_strings = F_PACK_STRINGS
		1528	get_text_keys = F_TEXT_KEYS
		1529	get_text_strings = F_TEXT_STRINGS
		1530	get_validate_utf8 = F_VALIDATE_UTF8
1042	PPCODE:	1531	PPCODE:
1043	XPUSHs (boolSV (self->flags & ix));	1532	XPUSHs (boolSV (self->flags & ix));
1044		1533
1045	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1534	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1046	PPCODE:	1535	PPCODE:
…		…
1059	XPUSHs (ST (0));	1548	XPUSHs (ST (0));
1060		1549
1061	int get_max_size (CBOR *self)	1550	int get_max_size (CBOR *self)
1062	CODE:	1551	CODE:
1063	RETVAL = self->max_size;	1552	RETVAL = self->max_size;
		1553	OUTPUT:
		1554	RETVAL
		1555
		1556	void filter (CBOR *self, SV *filter = 0)
		1557	PPCODE:
		1558	SvREFCNT_dec (self->filter);
		1559	self->filter = filter ? newSVsv (filter) : filter;
		1560	XPUSHs (ST (0));
		1561
		1562	SV *get_filter (CBOR *self)
		1563	CODE:
		1564	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1064	OUTPUT:	1565	OUTPUT:
1065	RETVAL	1566	RETVAL
1066		1567
1067	void encode (CBOR *self, SV *scalar)	1568	void encode (CBOR *self, SV *scalar)
1068	PPCODE:	1569	PPCODE:
…		…
1083	EXTEND (SP, 2);	1584	EXTEND (SP, 2);
1084	PUSHs (sv);	1585	PUSHs (sv);
1085	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1586	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1086	}	1587	}
1087		1588
		1589	void incr_parse (CBOR *self, SV *cborstr)
		1590	ALIAS:
		1591	incr_parse_multiple = 1
		1592	PPCODE:
		1593	{
		1594	if (SvUTF8 (cborstr))
		1595	sv_utf8_downgrade (cborstr, 0);
		1596
		1597	if (!self->incr_count)
		1598	{
		1599	self->incr_count = newAV ();
		1600	self->incr_pos = 0;
		1601	self->incr_need = 1;
		1602
		1603	av_push (self->incr_count, newSViv (1));
		1604	}
		1605
		1606	do
		1607	{
		1608	if (!incr_parse (self, cborstr))
		1609	{
		1610	if (self->incr_need > self->max_size && self->max_size)
		1611	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1612	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1613
		1614	break;
		1615	}
		1616
		1617	SV *sv;
		1618	char *offset;
		1619
		1620	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1621	XPUSHs (sv);
		1622
		1623	sv_chop (cborstr, offset);
		1624
		1625	av_clear (self->incr_count);
		1626	av_push (self->incr_count, newSViv (1));
		1627
		1628	self->incr_pos = 0;
		1629	self->incr_need = self->incr_pos + 1;
		1630	}
		1631	while (ix);
		1632	}
		1633
		1634	void incr_reset (CBOR *self)
		1635	CODE:
		1636	{
		1637	SvREFCNT_dec (self->incr_count);
		1638	self->incr_count = 0;
		1639	}
		1640
		1641	void DESTROY (CBOR *self)
		1642	PPCODE:
		1643	cbor_free (self);
		1644
1088	PROTOTYPES: ENABLE	1645	PROTOTYPES: ENABLE
1089		1646
1090	void encode_cbor (SV *scalar)	1647	void encode_cbor (SV *scalar)
		1648	ALIAS:
		1649	encode_cbor = 0
		1650	encode_cbor_sharing = F_ALLOW_SHARING
1091	PPCODE:	1651	PPCODE:
1092	{	1652	{
1093	CBOR cbor;	1653	CBOR cbor;
1094	cbor_init (&cbor);	1654	cbor_init (&cbor);
		1655	cbor.flags |= ix;
1095	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1656	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1096	XPUSHs (scalar);	1657	XPUSHs (scalar);
1097	}	1658	}
1098		1659
1099	void decode_cbor (SV *cborstr)	1660	void decode_cbor (SV *cborstr)

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