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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.16 by root, Tue Oct 29 20:59:16 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
29	CBOR_TAG_PERL_OBJECT = 256,	70	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
30	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
31		77
32	// rfc7049	78	// rfc7049
33	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	79	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
34	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	80	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
35	CBOR_TAG_POS_BIGNUM = 2, // byte string	81	CBOR_TAG_POS_BIGNUM = 2, // byte string
36	CBOR_TAG_NEG_BIGNUM = 3, // byte string	82	CBOR_TAG_NEG_BIGNUM = 3, // byte string
37	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	83	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
38	CBOR_TAG_BIGFLOAT = 5, // array	84	CBOR_TAG_BIGFLOAT = 5, // array
39		85
40	CBOR_TAG_CONV_B64U = 21, // base64url, any	86	CBOR_TAG_CONV_B64U = 21, // base64url, any
41	CBOR_TAG_CONV_B64 = 22, // base64, any	87	CBOR_TAG_CONV_B64 = 22, // base64, any
42	CBOR_TAG_CONV_HEX = 23, // base16, any	88	CBOR_TAG_CONV_HEX = 23, // base16, any
43	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	89	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
44		90
45	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	91	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
46	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	92	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
47	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	93	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
48	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	94	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
49	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	95	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
50		96
51	CBOR_TAG_MAGIC = 55799 // self-describe cbor	97	CBOR_TAG_MAGIC = 55799, // self-describe cbor
52	};	98	};
53		99
54	#define F_SHRINK 0x00000200UL	100	#define F_SHRINK 0x00000001UL
55	#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_TEXT_KEYS 0x00000020UL
		106	#define F_TEXT_STRINGS 0x00000040UL
		107	#define F_VALIDATE_UTF8 0x00000080UL
56		108
57	#define INIT_SIZE 32 // initial scalar size to be allocated	109	#define INIT_SIZE 32 // initial scalar size to be allocated
58		110
59	#define SB do {	111	#define SB do {
60	#define SE } while (0)	112	#define SE } while (0)
…		…
72	# define CBOR_SLOW 0	124	# define CBOR_SLOW 0
73	# define CBOR_STASH cbor_stash	125	# define CBOR_STASH cbor_stash
74	#endif	126	#endif
75		127
76	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::
77	static SV *types_true, *types_false, *types_error, *sv_cbor;	129	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
78		130
79	typedef struct {	131	typedef struct {
80	U32 flags;	132	U32 flags;
81	U32 max_depth;	133	U32 max_depth;
82	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.
83	} CBOR;	141	} CBOR;
84		142
85	ecb_inline void	143	ecb_inline void
86	cbor_init (CBOR *cbor)	144	cbor_init (CBOR *cbor)
87	{	145	{
88	Zero (cbor, 1, CBOR);	146	Zero (cbor, 1, CBOR);
89	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);
90	}	155	}
91		156
92	/////////////////////////////////////////////////////////////////////////////	157	/////////////////////////////////////////////////////////////////////////////
93	// utility functions	158	// utility functions
94		159
…		…
116	SvPV_renew (sv, SvCUR (sv) + 1);	181	SvPV_renew (sv, SvCUR (sv) + 1);
117	#endif	182	#endif
118	}	183	}
119	}	184	}
120		185
121	/////////////////////////////////////////////////////////////////////////////	186	// minimum length of a string to be registered for stringref
122	// fp hell	187	ecb_inline int
123		188	minimum_string_length (UV idx)
124	//TODO	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	}
125		200
126	/////////////////////////////////////////////////////////////////////////////	201	/////////////////////////////////////////////////////////////////////////////
127	// encoder	202	// encoder
128		203
129	// structure used for encoding CBOR	204	// structure used for encoding CBOR
…		…
132	char *cur; // SvPVX (sv) + current output position	207	char *cur; // SvPVX (sv) + current output position
133	char *end; // SvEND (sv)	208	char *end; // SvEND (sv)
134	SV *sv; // result scalar	209	SV *sv; // result scalar
135	CBOR cbor;	210	CBOR cbor;
136	U32 depth; // recursion level	211	U32 depth; // recursion level
		212	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		213	UV stringref_idx;
		214	HV *shareable; // ptr => index, or 0
		215	UV shareable_idx;
137	} enc_t;	216	} enc_t;
138		217
139	ecb_inline void	218	ecb_inline void
140	need (enc_t *enc, STRLEN len)	219	need (enc_t *enc, STRLEN len)
141	{	220	{
…		…
158	static void	237	static void
159	encode_uint (enc_t *enc, int major, UV len)	238	encode_uint (enc_t *enc, int major, UV len)
160	{	239	{
161	need (enc, 9);	240	need (enc, 9);
162		241
163	if (len < 24)	242	if (ecb_expect_true (len < LENGTH_EXT1))
164	*enc->cur++ = major | len;	243	*enc->cur++ = major | len;
165	else if (len <= 0xff)	244	else if (ecb_expect_true (len <= 0xffU))
166	{	245	{
167	*enc->cur++ = major | 24;	246	*enc->cur++ = major | LENGTH_EXT1;
168	*enc->cur++ = len;	247	*enc->cur++ = len;
169	}	248	}
170	else if (len <= 0xffff)	249	else if (len <= 0xffffU)
171	{	250	{
172	*enc->cur++ = major | 25;	251	*enc->cur++ = major | LENGTH_EXT2;
173	*enc->cur++ = len >> 8;	252	*enc->cur++ = len >> 8;
174	*enc->cur++ = len;	253	*enc->cur++ = len;
175	}	254	}
176	else if (len <= 0xffffffff)	255	else if (len <= 0xffffffffU)
177	{	256	{
178	*enc->cur++ = major | 26;	257	*enc->cur++ = major | LENGTH_EXT4;
179	*enc->cur++ = len >> 24;	258	*enc->cur++ = len >> 24;
180	*enc->cur++ = len >> 16;	259	*enc->cur++ = len >> 16;
181	*enc->cur++ = len >> 8;	260	*enc->cur++ = len >> 8;
182	*enc->cur++ = len;	261	*enc->cur++ = len;
183	}	262	}
184	else	263	else
185	{	264	{
186	*enc->cur++ = major | 27;	265	*enc->cur++ = major | LENGTH_EXT8;
187	*enc->cur++ = len >> 56;	266	*enc->cur++ = len >> 56;
188	*enc->cur++ = len >> 48;	267	*enc->cur++ = len >> 48;
189	*enc->cur++ = len >> 40;	268	*enc->cur++ = len >> 40;
190	*enc->cur++ = len >> 32;	269	*enc->cur++ = len >> 32;
191	*enc->cur++ = len >> 24;	270	*enc->cur++ = len >> 24;
…		…
193	*enc->cur++ = len >> 8;	272	*enc->cur++ = len >> 8;
194	*enc->cur++ = len;	273	*enc->cur++ = len;
195	}	274	}
196	}	275	}
197		276
198	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
199	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	285	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
200	{	286	{
201	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);
202	need (enc, len);	317	need (enc, len);
203	memcpy (enc->cur, str, len);	318	memcpy (enc->cur, str, len);
204	enc->cur += len;	319	enc->cur += len;
205	}	320	}
206		321
		322	ecb_inline void
		323	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		324	{
		325	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		326	{
		327	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		328
		329	if (SvOK (*svp))
		330	{
		331	// already registered, use stringref
		332	encode_tag (enc, CBOR_TAG_STRINGREF);
		333	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		334	return;
		335	}
		336	else if (len >= minimum_string_length (enc->stringref_idx))
		337	{
		338	// register only
		339	sv_setuv (*svp, enc->stringref_idx);
		340	++enc->stringref_idx;
		341	}
		342	}
		343
		344	encode_str (enc, upgrade_utf8, utf8, str, len);
		345	}
		346
207	static void encode_sv (enc_t *enc, SV *sv);	347	static void encode_sv (enc_t *enc, SV *sv);
208		348
209	static void	349	static void
210	encode_av (enc_t *enc, AV *av)	350	encode_av (enc_t *enc, AV *av)
211	{	351	{
…		…
214	if (enc->depth >= enc->cbor.max_depth)	354	if (enc->depth >= enc->cbor.max_depth)
215	croak (ERR_NESTING_EXCEEDED);	355	croak (ERR_NESTING_EXCEEDED);
216		356
217	++enc->depth;	357	++enc->depth;
218		358
219	encode_uint (enc, 0x80, len + 1);	359	encode_uint (enc, MAJOR_ARRAY, len + 1);
220		360
		361	if (SvMAGICAL (av))
221	for (i = 0; i <= len; ++i)	362	for (i = 0; i <= len; ++i)
222	{	363	{
223	SV **svp = av_fetch (av, i, 0);	364	SV **svp = av_fetch (av, i, 0);
224	encode_sv (enc, svp ? *svp : &PL_sv_undef);	365	encode_sv (enc, svp ? *svp : &PL_sv_undef);
225	}	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	}
226		373
227	--enc->depth;	374	--enc->depth;
228	}	375	}
229		376
230	static void	377	static void
…		…
239		386
240	int pairs = hv_iterinit (hv);	387	int pairs = hv_iterinit (hv);
241	int mg = SvMAGICAL (hv);	388	int mg = SvMAGICAL (hv);
242		389
243	if (mg)	390	if (mg)
244	encode_ch (enc, 0xa0 | 31);	391	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
245	else	392	else
246	encode_uint (enc, 0xa0, pairs);	393	encode_uint (enc, MAJOR_MAP, pairs);
247		394
248	while ((he = hv_iternext (hv)))	395	while ((he = hv_iternext (hv)))
249	{	396	{
250	if (HeKLEN (he) == HEf_SVKEY)	397	if (HeKLEN (he) == HEf_SVKEY)
251	encode_sv (enc, HeSVKEY (he));	398	encode_sv (enc, HeSVKEY (he));
252	else	399	else
253	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));
254		401
255	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));
256	}	403	}
257		404
258	if (mg)	405	if (mg)
259	encode_ch (enc, 0xe0 | 31);	406	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
260		407
261	--enc->depth;	408	--enc->depth;
262	}	409	}
263		410
264	// encode objects, arrays and special \0=false and \1=true values.	411	// encode objects, arrays and special \0=false and \1=true values.
265	static void	412	static void
266	encode_rv (enc_t *enc, SV *sv)	413	encode_rv (enc_t *enc, SV *sv)
267	{	414	{
268	svtype svt;
269
270	SvGETMAGIC (sv);	415	SvGETMAGIC (sv);
		416
271	svt = SvTYPE (sv);	417	svtype svt = SvTYPE (sv);
272		418
273	if (ecb_expect_false (SvOBJECT (sv)))	419	if (ecb_expect_false (SvOBJECT (sv)))
274	{	420	{
275	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash	421	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
276	? types_boolean_stash	422	? types_boolean_stash
…		…
281	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	427	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
282	? cbor_tagged_stash	428	? cbor_tagged_stash
283	: gv_stashpv ("CBOR::XS::Tagged" , 1);	429	: gv_stashpv ("CBOR::XS::Tagged" , 1);
284		430
285	HV *stash = SvSTASH (sv);	431	HV *stash = SvSTASH (sv);
286	GV *method;
287		432
288	if (stash == boolean_stash)	433	if (stash == boolean_stash)
289	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	}
290	else if (stash == error_stash)	438	else if (stash == error_stash)
291	encode_ch (enc, 0xe0 | 23);	439	{
		440	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		441	return;
		442	}
292	else if (stash == tagged_stash)	443	else if (stash == tagged_stash)
293	{	444	{
294	if (svt != SVt_PVAV)	445	if (svt != SVt_PVAV)
295	croak ("encountered CBOR::XS::Tagged object that isn't an array");	446	croak ("encountered CBOR::XS::Tagged object that isn't an array");
296		447
297	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	448	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
298	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))
299	}	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
300	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))	482	if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
301	{	483	{
302	dSP;	484	dSP;
303		485
304	ENTER; SAVETMPS; PUSHMARK (SP);	486	ENTER; SAVETMPS;
		487	PUSHMARK (SP);
305	// 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
306	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	489	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
307		490
308	PUTBACK;	491	PUTBACK;
309	// G_SCALAR ensures that return value is 1	492	// G_SCALAR ensures that return value is 1
…		…
322	}	505	}
323	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)	506	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
324	{	507	{
325	dSP;	508	dSP;
326		509
327	ENTER; SAVETMPS; PUSHMARK (SP);	510	ENTER; SAVETMPS;
		511	SAVESTACK_POS ();
		512	PUSHMARK (SP);
328	EXTEND (SP, 2);	513	EXTEND (SP, 2);
329	// 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
330	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	515	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
331	PUSHs (sv_cbor);	516	PUSHs (sv_cbor);
332		517
…		…
336		521
337	// catch this surprisingly common error	522	// catch this surprisingly common error
338	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)	523	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
339	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));
340		525
341	encode_uint (enc, 0xc0, CBOR_TAG_PERL_OBJECT);	526	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
342	encode_uint (enc, 0x80, count + 1);	527	encode_uint (enc, MAJOR_ARRAY, count + 1);
343	encode_str (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));	528	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
344		529
345	while (count)	530	while (count)
346	encode_sv (enc, SP[1 - count--]);	531	encode_sv (enc, SP[1 - count--]);
347		532
348	PUTBACK;	533	PUTBACK;
…		…
355	}	540	}
356	else if (svt == SVt_PVHV)	541	else if (svt == SVt_PVHV)
357	encode_hv (enc, (HV *)sv);	542	encode_hv (enc, (HV *)sv);
358	else if (svt == SVt_PVAV)	543	else if (svt == SVt_PVAV)
359	encode_av (enc, (AV *)sv);	544	encode_av (enc, (AV *)sv);
360	else if (svt < SVt_PVAV)
361	{
362	STRLEN len = 0;
363	char *pv = svt ? SvPV (sv, len) : 0;
364
365	if (len == 1 && *pv == '1')
366	encode_ch (enc, 0xe0 | 21);
367	else if (len == 1 && *pv == '0')
368	encode_ch (enc, 0xe0 | 20);
369	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
370	encode_ch (enc, 0xe0 | 23);
371	else
372	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
373	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
374	}
375	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
376	encode_ch (enc, 0xe0 | 23);
377	else	545	else
378	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	546	{
379	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	547	encode_tag (enc, CBOR_TAG_INDIRECTION);
		548	encode_sv (enc, sv);
		549	}
380	}	550	}
381		551
382	static void	552	static void
383	encode_nv (enc_t *enc, SV *sv)	553	encode_nv (enc_t *enc, SV *sv)
384	{	554	{
385	double nv = SvNVX (sv);	555	double nv = SvNVX (sv);
386		556
387	need (enc, 9);	557	need (enc, 9);
388		558
389	if (ecb_expect_false (nv == (U32)nv))	559	if (ecb_expect_false (nv == (NV)(U32)nv))
390	encode_uint (enc, 0x00, (U32)nv);	560	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
391	//TODO: maybe I32?	561	//TODO: maybe I32?
392	else if (ecb_expect_false (nv == (float)nv))	562	else if (ecb_expect_false (nv == (float)nv))
393	{	563	{
394	uint32_t fp = ecb_float_to_binary32 (nv);	564	uint32_t fp = ecb_float_to_binary32 (nv);
395		565
396	*enc->cur++ = 0xe0 | 26;	566	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
397		567
398	if (!ecb_big_endian ())	568	if (!ecb_big_endian ())
399	fp = ecb_bswap32 (fp);	569	fp = ecb_bswap32 (fp);
400		570
401	memcpy (enc->cur, &fp, 4);	571	memcpy (enc->cur, &fp, 4);
…		…
403	}	573	}
404	else	574	else
405	{	575	{
406	uint64_t fp = ecb_double_to_binary64 (nv);	576	uint64_t fp = ecb_double_to_binary64 (nv);
407		577
408	*enc->cur++ = 0xe0 | 27;	578	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
409		579
410	if (!ecb_big_endian ())	580	if (!ecb_big_endian ())
411	fp = ecb_bswap64 (fp);	581	fp = ecb_bswap64 (fp);
412		582
413	memcpy (enc->cur, &fp, 8);	583	memcpy (enc->cur, &fp, 8);
…		…
422		592
423	if (SvPOKp (sv))	593	if (SvPOKp (sv))
424	{	594	{
425	STRLEN len;	595	STRLEN len;
426	char *str = SvPV (sv, len);	596	char *str = SvPV (sv, len);
427	encode_str (enc, SvUTF8 (sv), str, len);	597	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
428	}	598	}
429	else if (SvNOKp (sv))	599	else if (SvNOKp (sv))
430	encode_nv (enc, sv);	600	encode_nv (enc, sv);
431	else if (SvIOKp (sv))	601	else if (SvIOKp (sv))
432	{	602	{
433	if (SvIsUV (sv))	603	if (SvIsUV (sv))
434	encode_uint (enc, 0x00, SvUVX (sv));	604	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
435	else if (SvIVX (sv) >= 0)	605	else if (SvIVX (sv) >= 0)
436	encode_uint (enc, 0x00, SvIVX (sv));	606	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
437	else	607	else
438	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	608	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
439	}	609	}
440	else if (SvROK (sv))	610	else if (SvROK (sv))
441	encode_rv (enc, SvRV (sv));	611	encode_rv (enc, SvRV (sv));
442	else if (!SvOK (sv))	612	else if (!SvOK (sv))
443	encode_ch (enc, 0xe0 | 22);	613	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
444	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	614	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
445	encode_ch (enc, 0xe0 | 23);	615	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
446	else	616	else
447	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",
448	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	618	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
449	}	619	}
450		620
451	static SV *	621	static SV *
452	encode_cbor (SV *scalar, CBOR *cbor)	622	encode_cbor (SV *scalar, CBOR *cbor)
453	{	623	{
454	enc_t enc;	624	enc_t enc = { 0 };
455		625
456	enc.cbor = *cbor;	626	enc.cbor = *cbor;
457	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	627	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
458	enc.cur = SvPVX (enc.sv);	628	enc.cur = SvPVX (enc.sv);
459	enc.end = SvEND (enc.sv);	629	enc.end = SvEND (enc.sv);
460	enc.depth = 0;
461		630
462	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
463	encode_sv (&enc, scalar);	640	encode_sv (&enc, scalar);
464		641
465	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	642	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
466	*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
467		644
…		…
481	U8 *end; // end of input string	658	U8 *end; // end of input string
482	const char *err; // parse error, if != 0	659	const char *err; // parse error, if != 0
483	CBOR cbor;	660	CBOR cbor;
484	U32 depth; // recursion depth	661	U32 depth; // recursion depth
485	U32 maxdepth; // recursion depth limit	662	U32 maxdepth; // recursion depth limit
		663	AV *shareable;
		664	AV *stringref;
		665	SV *decode_tagged;
		666	SV *err_sv; // optional sv for error, needs to be freed
486	} dec_t;	667	} dec_t;
487		668
488	#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);
489		676
490	#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;
491		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
492	#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)
493	#define DEC_DEC_DEPTH --dec->depth	712	#define DEC_DEC_DEPTH --dec->depth
494		713
495	static UV	714	static UV
496	decode_uint (dec_t *dec)	715	decode_uint (dec_t *dec)
497	{	716	{
498	switch (*dec->cur & 31)	717	U8 m = *dec->cur & MINOR_MASK;
499	{	718	++dec->cur;
500	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
501	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
502	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
503	return *dec->cur++ & 31;
504		719
505	case 24:	720	if (ecb_expect_true (m < LENGTH_EXT1))
		721	return m;
		722	else if (ecb_expect_true (m == LENGTH_EXT1))
		723	{
506	WANT (2);	724	WANT (1);
507	dec->cur += 2;	725	dec->cur += 1;
508	return dec->cur[-1];	726	return dec->cur[-1];
509		727	}
510	case 25:	728	else if (ecb_expect_true (m == LENGTH_EXT2))
		729	{
511	WANT (3);	730	WANT (2);
512	dec->cur += 3;	731	dec->cur += 2;
513	return (((UV)dec->cur[-2]) << 8)	732	return (((UV)dec->cur[-2]) << 8)
514	| ((UV)dec->cur[-1]);	733	| ((UV)dec->cur[-1]);
515		734	}
516	case 26:	735	else if (ecb_expect_true (m == LENGTH_EXT4))
		736	{
517	WANT (5);	737	WANT (4);
518	dec->cur += 5;	738	dec->cur += 4;
519	return (((UV)dec->cur[-4]) << 24)	739	return (((UV)dec->cur[-4]) << 24)
520	| (((UV)dec->cur[-3]) << 16)	740	| (((UV)dec->cur[-3]) << 16)
521	| (((UV)dec->cur[-2]) << 8)	741	| (((UV)dec->cur[-2]) << 8)
522	| ((UV)dec->cur[-1]);	742	| ((UV)dec->cur[-1]);
523		743	}
524	case 27:	744	else if (ecb_expect_true (m == LENGTH_EXT8))
		745	{
525	WANT (9);	746	WANT (8);
526	dec->cur += 9;	747	dec->cur += 8;
		748
		749	return
		750	#if UVSIZE < 8
		751	0
		752	#else
527	return (((UV)dec->cur[-8]) << 56)	753	(((UV)dec->cur[-8]) << 56)
528	| (((UV)dec->cur[-7]) << 48)	754	| (((UV)dec->cur[-7]) << 48)
529	| (((UV)dec->cur[-6]) << 40)	755	| (((UV)dec->cur[-6]) << 40)
530	| (((UV)dec->cur[-5]) << 32)	756	| (((UV)dec->cur[-5]) << 32)
		757	#endif
531	| (((UV)dec->cur[-4]) << 24)	758	| (((UV)dec->cur[-4]) << 24)
532	| (((UV)dec->cur[-3]) << 16)	759	| (((UV)dec->cur[-3]) << 16)
533	| (((UV)dec->cur[-2]) << 8)	760	| (((UV)dec->cur[-2]) << 8)
534	| ((UV)dec->cur[-1]);	761	| ((UV)dec->cur[-1]);
535		762	}
536	default:	763	else
537	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	764	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
538	}
539		765
540	fail:	766	fail:
541	return 0;	767	return 0;
542	}	768	}
543		769
…		…
548	{	774	{
549	AV *av = newAV ();	775	AV *av = newAV ();
550		776
551	DEC_INC_DEPTH;	777	DEC_INC_DEPTH;
552		778
553	if ((*dec->cur & 31) == 31)	779	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
554	{	780	{
555	++dec->cur;	781	++dec->cur;
556		782
557	for (;;)	783	for (;;)
558	{	784	{
559	WANT (1);	785	WANT (1);
560		786
561	if (*dec->cur == (0xe0 | 31))	787	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
562	{	788	{
563	++dec->cur;	789	++dec->cur;
564	break;	790	break;
565	}	791	}
566		792
567	av_push (av, decode_sv (dec));	793	av_push (av, decode_sv (dec));
568	}	794	}
569	}	795	}
570	else	796	else
571	{	797	{
572	int i, len = decode_uint (dec);	798	UV i, len = decode_uint (dec);
573		799
		800	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
574	av_fill (av, len - 1);	801	av_fill (av, len - 1);
575		802
576	for (i = 0; i < len; ++i)	803	for (i = 0; i < len; ++i)
577	AvARRAY (av)[i] = decode_sv (dec);	804	AvARRAY (av)[i] = decode_sv (dec);
578	}	805	}
…		…
588		815
589	static void	816	static void
590	decode_he (dec_t *dec, HV *hv)	817	decode_he (dec_t *dec, HV *hv)
591	{	818	{
592	// for speed reasons, we specialcase single-string	819	// for speed reasons, we specialcase single-string
593	// byte or utf-8 strings as keys.	820	// byte or utf-8 strings as keys, but only when !stringref
594		821
595	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))
596	{	824	{
597	I32 len = decode_uint (dec);	825	STRLEN len = decode_uint (dec);
598	char *key = (char *)dec->cur;	826	char *key = (char *)dec->cur;
599		827
		828	WANT (len);
600	dec->cur += len;	829	dec->cur += len;
601		830
602	hv_store (hv, key, len, decode_sv (dec), 0);	831	hv_store (hv, key, len, decode_sv (dec), 0);
		832
		833	return;
603	}	834	}
604	else if (*dec->cur >= 0x60 && *dec->cur <= 0x60 + 27)	835	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
605	{	836	{
606	I32 len = decode_uint (dec);	837	STRLEN len = decode_uint (dec);
607	char *key = (char *)dec->cur;	838	char *key = (char *)dec->cur;
608		839
		840	WANT (len);
609	dec->cur += len;	841	dec->cur += len;
610		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
611	hv_store (hv, key, -len, decode_sv (dec), 0);	847	hv_store (hv, key, -len, decode_sv (dec), 0);
		848
		849	return;
612	}	850	}
613	else	851
614	{
615	SV *k = decode_sv (dec);	852	SV *k = decode_sv (dec);
616	SV *v = decode_sv (dec);	853	SV *v = decode_sv (dec);
617		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
618	hv_store_ent (hv, k, v, 0);	883	hv_store_ent (hv, k, v, 0);
619	SvREFCNT_dec (k);	884	SvREFCNT_dec (k);
620	}	885
		886	fail:
		887	;
621	}	888	}
622		889
623	static SV *	890	static SV *
624	decode_hv (dec_t *dec)	891	decode_hv (dec_t *dec)
625	{	892	{
626	HV *hv = newHV ();	893	HV *hv = newHV ();
627		894
628	DEC_INC_DEPTH;	895	DEC_INC_DEPTH;
629		896
630	if ((*dec->cur & 31) == 31)	897	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
631	{	898	{
632	++dec->cur;	899	++dec->cur;
633		900
634	for (;;)	901	for (;;)
635	{	902	{
636	WANT (1);	903	WANT (1);
637		904
638	if (*dec->cur == (0xe0 | 31))	905	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
639	{	906	{
640	++dec->cur;	907	++dec->cur;
641	break;	908	break;
642	}	909	}
643		910
644	decode_he (dec, hv);	911	decode_he (dec, hv);
645	}	912	}
646	}	913	}
647	else	914	else
648	{	915	{
649	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
650		919
651	while (pairs--)	920	while (pairs--)
652	decode_he (dec, hv);	921	decode_he (dec, hv);
653	}	922	}
654		923
…		…
664	static SV *	933	static SV *
665	decode_str (dec_t *dec, int utf8)	934	decode_str (dec_t *dec, int utf8)
666	{	935	{
667	SV *sv = 0;	936	SV *sv = 0;
668		937
669	if ((*dec->cur & 31) == 31)	938	if ((*dec->cur & MINOR_MASK) == MINOR_INDEF)
670	{	939	{
		940	// indefinite length strings
671	++dec->cur;	941	++dec->cur;
672		942
		943	U8 major = *dec->cur & MAJOR_MISC;
		944
673	sv = newSVpvn ("", 0);	945	sv = newSVpvn ("", 0);
674		946
675	// not very fast, and certainly not robust against illegal input
676	for (;;)	947	for (;;)
677	{	948	{
678	WANT (1);	949	WANT (1);
679		950
680	if (*dec->cur == (0xe0 | 31))	951	if ((*dec->cur - major) > LENGTH_EXT8)
		952	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
681	{	953	{
682	++dec->cur;	954	++dec->cur;
683	break;	955	break;
684	}	956	}
		957	else
		958	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
685		959
686	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;
687	}	965	}
688	}	966	}
689	else	967	else
690	{	968	{
691	STRLEN len = decode_uint (dec);	969	STRLEN len = decode_uint (dec);
692		970
693	WANT (len);	971	WANT (len);
694	sv = newSVpvn (dec->cur, len);	972	sv = newSVpvn (dec->cur, len);
695	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));
696	}	978	}
697		979
698	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
699	SvUTF8_on (sv);	986	SvUTF8_on (sv);
		987	}
700		988
701	return sv;	989	return sv;
702		990
703	fail:	991	fail:
704	SvREFCNT_dec (sv);	992	SvREFCNT_dec (sv);
…		…
706	}	994	}
707		995
708	static SV *	996	static SV *
709	decode_tagged (dec_t *dec)	997	decode_tagged (dec_t *dec)
710	{	998	{
		999	SV *sv = 0;
711	UV tag = decode_uint (dec);	1000	UV tag = decode_uint (dec);
		1001
		1002	WANT (1);
		1003
		1004	switch (tag)
		1005	{
		1006	case CBOR_TAG_MAGIC:
712	SV *sv = decode_sv (dec);	1007	sv = decode_sv (dec);
		1008	break;
713		1009
714	if (tag == CBOR_TAG_MAGIC)	1010	case CBOR_TAG_INDIRECTION:
715	return sv;	1011	sv = newRV_noinc (decode_sv (dec));
716	else if (tag == CBOR_TAG_PERL_OBJECT)	1012	break;
717	{	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
		1043	case CBOR_TAG_VALUE_SHAREABLE:
		1044	{
		1045	if (ecb_expect_false (!dec->shareable))
		1046	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1047
		1048	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1049	{
		1050	sv = newSV (0);
		1051	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1052
		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;
		1066
		1067	case CBOR_TAG_VALUE_SHAREDREF:
		1068	{
		1069	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1070	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1071
		1072	UV idx = decode_uint (dec);
		1073
		1074	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		1075	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1076
		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");
		1081	}
		1082	break;
		1083
		1084	case CBOR_TAG_PERL_OBJECT:
		1085	{
		1086	sv = decode_sv (dec);
		1087
718	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)	1088	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
719	ERR ("corrupted CBOR data (non-array perl object)");	1089	ERR ("corrupted CBOR data (non-array perl object)");
720		1090
721	AV *av = (AV *)SvRV (sv);	1091	AV *av = (AV *)SvRV (sv);
722	int len = av_len (av) + 1;	1092	int len = av_len (av) + 1;
723	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);	1093	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
724		1094
725	if (!stash)	1095	if (!stash)
726	ERR ("cannot decode perl-object (package does not exist)");	1096	ERR ("cannot decode perl-object (package does not exist)");
727		1097
728	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);	1098	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
729		1099
730	if (!method)	1100	if (!method)
731	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)");
732		1102
733	dSP;	1103	dSP;
734		1104
735	ENTER; SAVETMPS; PUSHMARK (SP);	1105	ENTER; SAVETMPS;
		1106	PUSHMARK (SP);
736	EXTEND (SP, len + 1);	1107	EXTEND (SP, len + 1);
737	// 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
738	PUSHs (*av_fetch (av, 0, 1));	1109	PUSHs (*av_fetch (av, 0, 1));
739	PUSHs (sv_cbor);	1110	PUSHs (sv_cbor);
740		1111
741	int i;	1112	int i;
742		1113
743	for (i = 1; i < len; ++i)	1114	for (i = 1; i < len; ++i)
744	PUSHs (*av_fetch (av, i, 1));	1115	PUSHs (*av_fetch (av, i, 1));
745		1116
746	PUTBACK;	1117	PUTBACK;
747	call_sv ((SV *)GvCV (method), G_SCALAR);	1118	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
748	SPAGAIN;	1119	SPAGAIN;
749		1120
		1121	if (SvTRUE (ERRSV))
		1122	{
		1123	FREETMPS; LEAVE;
		1124	ERR_ERRSV;
		1125	}
		1126
750	SvREFCNT_dec (sv);	1127	SvREFCNT_dec (sv);
751	sv = SvREFCNT_inc (POPs);	1128	sv = SvREFCNT_inc (POPs);
752		1129
753	PUTBACK;	1130	PUTBACK;
754		1131
755	FREETMPS; LEAVE;	1132	FREETMPS; LEAVE;
		1133	}
		1134	break;
756		1135
757	return sv;	1136	default:
758	}	1137	{
759	else	1138	SV *tag_sv = newSVuv (tag);
760	{	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	{
761	AV *av = newAV ();	1169	AV *av = newAV ();
762	av_push (av, newSVuv (tag));	1170	av_push (av, tag_sv);
763	av_push (av, sv);	1171	av_push (av, sv);
764		1172
765	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	1173	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
766	? cbor_tagged_stash	1174	? cbor_tagged_stash
767	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1175	: gv_stashpv ("CBOR::XS::Tagged" , 1);
768
769	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);	1176	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1177	}
		1178
		1179	PUTBACK;
		1180
		1181	FREETMPS; LEAVE;
		1182	}
		1183	break;
770	}	1184	}
		1185
		1186	return sv;
771		1187
772	fail:	1188	fail:
773	SvREFCNT_dec (sv);	1189	SvREFCNT_dec (sv);
774	return &PL_sv_undef;	1190	return &PL_sv_undef;
775	}	1191	}
…		…
777	static SV *	1193	static SV *
778	decode_sv (dec_t *dec)	1194	decode_sv (dec_t *dec)
779	{	1195	{
780	WANT (1);	1196	WANT (1);
781		1197
782	switch (*dec->cur >> 5)	1198	switch (*dec->cur >> MAJOR_SHIFT)
783	{	1199	{
784	case 0: // unsigned int	1200	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
785	return newSVuv (decode_uint (dec));	1201	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
786	case 1: // negative int	1202	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
787	return newSViv (-1 - (IV)decode_uint (dec));	1203	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
788	case 2: // octet string	1204	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
789	return decode_str (dec, 0);	1205	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
790	case 3: // utf-8 string	1206	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
791	return decode_str (dec, 1);	1207
792	case 4: // array	1208	case MAJOR_MISC >> MAJOR_SHIFT:
793	return decode_av (dec);
794	case 5: // map
795	return decode_hv (dec);
796	case 6: // tag
797	return decode_tagged (dec);
798	case 7: // misc
799	switch (*dec->cur++ & 31)	1209	switch (*dec->cur++ & MINOR_MASK)
800	{	1210	{
801	case 20:	1211	case SIMPLE_FALSE:
802	#if CBOR_SLOW	1212	#if CBOR_SLOW
803	types_false = get_bool ("Types::Serialiser::false");	1213	types_false = get_bool ("Types::Serialiser::false");
804	#endif	1214	#endif
805	return newSVsv (types_false);	1215	return newSVsv (types_false);
806	case 21:	1216	case SIMPLE_TRUE:
807	#if CBOR_SLOW	1217	#if CBOR_SLOW
808	types_true = get_bool ("Types::Serialiser::true");	1218	types_true = get_bool ("Types::Serialiser::true");
809	#endif	1219	#endif
810	return newSVsv (types_true);	1220	return newSVsv (types_true);
811	case 22:	1221	case SIMPLE_NULL:
812	return newSVsv (&PL_sv_undef);	1222	return newSVsv (&PL_sv_undef);
813	case 23:	1223	case SIMPLE_UNDEF:
814	#if CBOR_SLOW	1224	#if CBOR_SLOW
815	types_error = get_bool ("Types::Serialiser::error");	1225	types_error = get_bool ("Types::Serialiser::error");
816	#endif	1226	#endif
817	return newSVsv (types_error);	1227	return newSVsv (types_error);
818		1228
819	case 25:	1229	case MISC_FLOAT16:
820	{	1230	{
821	WANT (2);	1231	WANT (2);
822		1232
823	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1233	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
824	dec->cur += 2;	1234	dec->cur += 2;
825		1235
826	return newSVnv (ecb_binary16_to_float (fp));	1236	return newSVnv (ecb_binary16_to_float (fp));
827	}	1237	}
828		1238
829	case 26:	1239	case MISC_FLOAT32:
830	{	1240	{
831	uint32_t fp;	1241	uint32_t fp;
832	WANT (4);	1242	WANT (4);
833	memcpy (&fp, dec->cur, 4);	1243	memcpy (&fp, dec->cur, 4);
834	dec->cur += 4;	1244	dec->cur += 4;
…		…
837	fp = ecb_bswap32 (fp);	1247	fp = ecb_bswap32 (fp);
838		1248
839	return newSVnv (ecb_binary32_to_float (fp));	1249	return newSVnv (ecb_binary32_to_float (fp));
840	}	1250	}
841		1251
842	case 27:	1252	case MISC_FLOAT64:
843	{	1253	{
844	uint64_t fp;	1254	uint64_t fp;
845	WANT (8);	1255	WANT (8);
846	memcpy (&fp, dec->cur, 8);	1256	memcpy (&fp, dec->cur, 8);
847	dec->cur += 8;	1257	dec->cur += 8;
…		…
850	fp = ecb_bswap64 (fp);	1260	fp = ecb_bswap64 (fp);
851		1261
852	return newSVnv (ecb_binary64_to_double (fp));	1262	return newSVnv (ecb_binary64_to_double (fp));
853	}	1263	}
854		1264
855	// 0..19 unassigned	1265	// 0..19 unassigned simple
856	// 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
857	default:	1269	default:
858	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1270	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
859	}	1271	}
860		1272
861	break;	1273	break;
862	}	1274	}
863		1275
…		…
866	}	1278	}
867		1279
868	static SV *	1280	static SV *
869	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1281	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
870	{	1282	{
871	dec_t dec;	1283	dec_t dec = { 0 };
872	SV *sv;	1284	SV *sv;
873	STRLEN len;	1285	STRLEN len;
874	char *data = SvPVbyte (string, len);	1286	char *data = SvPVbyte (string, len);
875		1287
876	if (len > cbor->max_size && cbor->max_size)	1288	if (len > cbor->max_size && cbor->max_size)
…		…
878	(unsigned long)len, (unsigned long)cbor->max_size);	1290	(unsigned long)len, (unsigned long)cbor->max_size);
879		1291
880	dec.cbor = *cbor;	1292	dec.cbor = *cbor;
881	dec.cur = (U8 *)data;	1293	dec.cur = (U8 *)data;
882	dec.end = (U8 *)data + len;	1294	dec.end = (U8 *)data + len;
883	dec.err = 0;
884	dec.depth = 0;
885		1295
886	sv = decode_sv (&dec);	1296	sv = decode_sv (&dec);
887		1297
888	if (offset_return)	1298	if (offset_return)
889	*offset_return = dec.cur;	1299	*offset_return = dec.cur;
…		…
892	if (dec.cur != dec.end && !dec.err)	1302	if (dec.cur != dec.end && !dec.err)
893	dec.err = "garbage after CBOR object";	1303	dec.err = "garbage after CBOR object";
894		1304
895	if (dec.err)	1305	if (dec.err)
896	{	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
897	SvREFCNT_dec (sv);	1318	SvREFCNT_dec (sv);
		1319
		1320	if (dec.err_sv)
		1321	sv_2mortal (dec.err_sv);
		1322
898	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);
899	}	1324	}
900		1325
901	sv = sv_2mortal (sv);	1326	sv = sv_2mortal (sv);
902		1327
903	return sv;	1328	return sv;
904	}	1329	}
905		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
906	/////////////////////////////////////////////////////////////////////////////	1455	/////////////////////////////////////////////////////////////////////////////
907	// XS interface functions	1456	// XS interface functions
908		1457
909	MODULE = CBOR::XS PACKAGE = CBOR::XS	1458	MODULE = CBOR::XS PACKAGE = CBOR::XS
910		1459
…		…
918		1467
919	types_true = get_bool ("Types::Serialiser::true" );	1468	types_true = get_bool ("Types::Serialiser::true" );
920	types_false = get_bool ("Types::Serialiser::false");	1469	types_false = get_bool ("Types::Serialiser::false");
921	types_error = get_bool ("Types::Serialiser::error");	1470	types_error = get_bool ("Types::Serialiser::error");
922		1471
		1472	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1473
923	sv_cbor = newSVpv ("CBOR", 0);	1474	sv_cbor = newSVpv ("CBOR", 0);
924	SvREADONLY_on (sv_cbor);	1475	SvREADONLY_on (sv_cbor);
		1476
		1477	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
925	}	1478	}
926		1479
927	PROTOTYPES: DISABLE	1480	PROTOTYPES: DISABLE
928		1481
929	void CLONE (...)	1482	void CLONE (...)
…		…
947		1500
948	void shrink (CBOR *self, int enable = 1)	1501	void shrink (CBOR *self, int enable = 1)
949	ALIAS:	1502	ALIAS:
950	shrink = F_SHRINK	1503	shrink = F_SHRINK
951	allow_unknown = F_ALLOW_UNKNOWN	1504	allow_unknown = F_ALLOW_UNKNOWN
		1505	allow_sharing = F_ALLOW_SHARING
		1506	allow_cycles = F_ALLOW_CYCLES
		1507	pack_strings = F_PACK_STRINGS
		1508	text_keys = F_TEXT_KEYS
		1509	text_strings = F_TEXT_STRINGS
		1510	validate_utf8 = F_VALIDATE_UTF8
952	PPCODE:	1511	PPCODE:
953	{	1512	{
954	if (enable)	1513	if (enable)
955	self->flags |= ix;	1514	self->flags |= ix;
956	else	1515	else
…		…
961		1520
962	void get_shrink (CBOR *self)	1521	void get_shrink (CBOR *self)
963	ALIAS:	1522	ALIAS:
964	get_shrink = F_SHRINK	1523	get_shrink = F_SHRINK
965	get_allow_unknown = F_ALLOW_UNKNOWN	1524	get_allow_unknown = F_ALLOW_UNKNOWN
		1525	get_allow_sharing = F_ALLOW_SHARING
		1526	get_allow_cycles = F_ALLOW_CYCLES
		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
966	PPCODE:	1531	PPCODE:
967	XPUSHs (boolSV (self->flags & ix));	1532	XPUSHs (boolSV (self->flags & ix));
968		1533
969	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1534	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
970	PPCODE:	1535	PPCODE:
…		…
983	XPUSHs (ST (0));	1548	XPUSHs (ST (0));
984		1549
985	int get_max_size (CBOR *self)	1550	int get_max_size (CBOR *self)
986	CODE:	1551	CODE:
987	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);
988	OUTPUT:	1565	OUTPUT:
989	RETVAL	1566	RETVAL
990		1567
991	void encode (CBOR *self, SV *scalar)	1568	void encode (CBOR *self, SV *scalar)
992	PPCODE:	1569	PPCODE:
…		…
1007	EXTEND (SP, 2);	1584	EXTEND (SP, 2);
1008	PUSHs (sv);	1585	PUSHs (sv);
1009	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1586	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1010	}	1587	}
1011		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
1012	PROTOTYPES: ENABLE	1645	PROTOTYPES: ENABLE
1013		1646
1014	void encode_cbor (SV *scalar)	1647	void encode_cbor (SV *scalar)
		1648	ALIAS:
		1649	encode_cbor = 0
		1650	encode_cbor_sharing = F_ALLOW_SHARING
1015	PPCODE:	1651	PPCODE:
1016	{	1652	{
1017	CBOR cbor;	1653	CBOR cbor;
1018	cbor_init (&cbor);	1654	cbor_init (&cbor);
		1655	cbor.flags |= ix;
1019	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1656	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1020	XPUSHs (scalar);	1657	XPUSHs (scalar);
1021	}	1658	}
1022		1659
1023	void decode_cbor (SV *cborstr)	1660	void decode_cbor (SV *cborstr)

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