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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.5 by root, Sat Oct 26 21:14:20 2013 UTC vs.
Revision 1.63 by root, Sat Nov 26 04:50:58 2016 UTC

…		…
6	#include <string.h>	6	#include <string.h>
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	#include <inttypes.h>
11		12
		13	#define ECB_NO_THREADS 1
12	#include "ecb.h"	14	#include "ecb.h"
13		15
		16	// compatibility with perl <5.18
		17	#ifndef HvNAMELEN_get
		18	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		19	#endif
		20	#ifndef HvNAMELEN
		21	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		22	#endif
		23	#ifndef HvNAMEUTF8
		24	# define HvNAMEUTF8(hv) 0
		25	#endif
		26	#ifndef SvREFCNT_inc_NN
		27	# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
		28	#endif
		29	#ifndef SvREFCNT_dec_NN
		30	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		31	#endif
		32
		33	// known major and minor types
		34	enum cbor_type
		35	{
		36	MAJOR_SHIFT = 5,
		37	MINOR_MASK = 0x1f,
		38
		39	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		40	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		41	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		42	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		43	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		44	MAJOR_MAP = 5 << MAJOR_SHIFT,
		45	MAJOR_TAG = 6 << MAJOR_SHIFT,
		46	MAJOR_MISC = 7 << MAJOR_SHIFT,
		47
		48	// INT/STRING/ARRAY/MAP subtypes
		49	LENGTH_EXT1 = 24,
		50	LENGTH_EXT2 = 25,
		51	LENGTH_EXT4 = 26,
		52	LENGTH_EXT8 = 27,
		53
		54	// SIMPLE types (effectively MISC subtypes)
		55	SIMPLE_FALSE = 20,
		56	SIMPLE_TRUE = 21,
		57	SIMPLE_NULL = 22,
		58	SIMPLE_UNDEF = 23,
		59
		60	// MISC subtype (unused)
		61	MISC_EXT1 = 24,
		62	MISC_FLOAT16 = 25,
		63	MISC_FLOAT32 = 26,
		64	MISC_FLOAT64 = 27,
		65
		66	// BYTES/TEXT/ARRAY/MAP
		67	MINOR_INDEF = 31,
		68	};
		69
		70	// known tags
		71	enum cbor_tag
		72	{
		73	// extensions
		74	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
		75	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
		76	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
		77	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
		78	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
		79	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
		80	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
		81
		82	// rfc7049
		83	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
		84	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
		85	CBOR_TAG_POS_BIGNUM = 2, // byte string
		86	CBOR_TAG_NEG_BIGNUM = 3, // byte string
		87	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
		88	CBOR_TAG_BIGFLOAT = 5, // array
		89
		90	CBOR_TAG_CONV_B64U = 21, // base64url, any
		91	CBOR_TAG_CONV_B64 = 22, // base64, any
		92	CBOR_TAG_CONV_HEX = 23, // base16, any
		93	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
		94
		95	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
		96	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
		97	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
		98	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
		99	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
		100
		101	CBOR_TAG_MAGIC = 55799, // self-describe cbor
		102	};
		103
14	#define F_SHRINK 0x00000200UL	104	#define F_SHRINK 0x00000001UL
15	#define F_ALLOW_UNKNOWN 0x00002000UL	105	#define F_ALLOW_UNKNOWN 0x00000002UL
		106	#define F_ALLOW_SHARING 0x00000004UL
		107	#define F_ALLOW_CYCLES 0x00000008UL
		108	#define F_FORBID_OBJECTS 0x00000010UL
		109	#define F_PACK_STRINGS 0x00000020UL
		110	#define F_TEXT_KEYS 0x00000040UL
		111	#define F_TEXT_STRINGS 0x00000080UL
		112	#define F_VALIDATE_UTF8 0x00000100UL
16		113
17	#define INIT_SIZE 32 // initial scalar size to be allocated	114	#define INIT_SIZE 32 // initial scalar size to be allocated
18		115
19	#define SB do {	116	#define SB do {
20	#define SE } while (0)	117	#define SE } while (0)
…		…
31	#else	128	#else
32	# define CBOR_SLOW 0	129	# define CBOR_SLOW 0
33	# define CBOR_STASH cbor_stash	130	# define CBOR_STASH cbor_stash
34	#endif	131	#endif
35		132
36	static HV *cbor_stash, *cbor_boolean_stash; // CBOR::XS::	133	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
37	static SV *cbor_true, *cbor_false;	134	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
38		135
39	typedef struct {	136	typedef struct {
40	U32 flags;	137	U32 flags;
41	U32 max_depth;	138	U32 max_depth;
42	STRLEN max_size;	139	STRLEN max_size;
		140	SV *filter;
43		141
44	SV *cb_object;	142	// for the incremental parser
45	HV *cb_sk_object;	143	STRLEN incr_pos; // the current offset into the text
		144	STRLEN incr_need; // minimum bytes needed to decode
		145	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
46	} CBOR;	146	} CBOR;
47		147
48	ecb_inline void	148	ecb_inline void
49	cbor_init (CBOR *cbor)	149	cbor_init (CBOR *cbor)
50	{	150	{
51	Zero (cbor, 1, CBOR);	151	Zero (cbor, 1, CBOR);
52	cbor->max_depth = 512;	152	cbor->max_depth = 512;
		153	}
		154
		155	ecb_inline void
		156	cbor_free (CBOR *cbor)
		157	{
		158	SvREFCNT_dec (cbor->filter);
		159	SvREFCNT_dec (cbor->incr_count);
53	}	160	}
54		161
55	/////////////////////////////////////////////////////////////////////////////	162	/////////////////////////////////////////////////////////////////////////////
56	// utility functions	163	// utility functions
57		164
…		…
79	SvPV_renew (sv, SvCUR (sv) + 1);	186	SvPV_renew (sv, SvCUR (sv) + 1);
80	#endif	187	#endif
81	}	188	}
82	}	189	}
83		190
84	/////////////////////////////////////////////////////////////////////////////	191	// minimum length of a string to be registered for stringref
85	// fp hell	192	ecb_inline int
86		193	minimum_string_length (UV idx)
87	//TODO	194	{
		195	return idx <= 23 ? 3
		196	: idx <= 0xffU ? 4
		197	: idx <= 0xffffU ? 5
		198	: idx <= 0xffffffffU ? 7
		199	: 11;
		200	}
88		201
89	/////////////////////////////////////////////////////////////////////////////	202	/////////////////////////////////////////////////////////////////////////////
90	// encoder	203	// encoder
91		204
92	// structure used for encoding CBOR	205	// structure used for encoding CBOR
…		…
95	char *cur; // SvPVX (sv) + current output position	208	char *cur; // SvPVX (sv) + current output position
96	char *end; // SvEND (sv)	209	char *end; // SvEND (sv)
97	SV *sv; // result scalar	210	SV *sv; // result scalar
98	CBOR cbor;	211	CBOR cbor;
99	U32 depth; // recursion level	212	U32 depth; // recursion level
		213	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		214	UV stringref_idx;
		215	HV *shareable; // ptr => index, or 0
		216	UV shareable_idx;
100	} enc_t;	217	} enc_t;
101		218
102	ecb_inline void	219	ecb_inline void
103	need (enc_t *enc, STRLEN len)	220	need (enc_t *enc, STRLEN len)
104	{	221	{
105	if (ecb_expect_false (enc->cur + len >= enc->end))	222	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
106	{	223	{
107	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	224	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
108	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	225	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
109	enc->cur = SvPVX (enc->sv) + cur;	226	enc->cur = SvPVX (enc->sv) + cur;
110	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	227	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
…		…
121	static void	238	static void
122	encode_uint (enc_t *enc, int major, UV len)	239	encode_uint (enc_t *enc, int major, UV len)
123	{	240	{
124	need (enc, 9);	241	need (enc, 9);
125		242
126	if (len < 24)	243	if (ecb_expect_true (len < LENGTH_EXT1))
127	*enc->cur++ = major | len;	244	*enc->cur++ = major | len;
128	else if (len <= 0xff)	245	else if (ecb_expect_true (len <= 0xffU))
129	{	246	{
130	*enc->cur++ = major | 24;	247	*enc->cur++ = major | LENGTH_EXT1;
131	*enc->cur++ = len;	248	*enc->cur++ = len;
132	}	249	}
133	else if (len <= 0xffff)	250	else if (len <= 0xffffU)
134	{	251	{
135	*enc->cur++ = major | 25;	252	*enc->cur++ = major | LENGTH_EXT2;
136	*enc->cur++ = len >> 8;	253	*enc->cur++ = len >> 8;
137	*enc->cur++ = len;	254	*enc->cur++ = len;
138	}	255	}
139	else if (len <= 0xffffffff)	256	else if (len <= 0xffffffffU)
140	{	257	{
141	*enc->cur++ = major | 26;	258	*enc->cur++ = major | LENGTH_EXT4;
142	*enc->cur++ = len >> 24;	259	*enc->cur++ = len >> 24;
143	*enc->cur++ = len >> 16;	260	*enc->cur++ = len >> 16;
144	*enc->cur++ = len >> 8;	261	*enc->cur++ = len >> 8;
145	*enc->cur++ = len;	262	*enc->cur++ = len;
146	}	263	}
147	else	264	else
148	{	265	{
149	*enc->cur++ = major | 27;	266	*enc->cur++ = major | LENGTH_EXT8;
150	*enc->cur++ = len >> 56;	267	*enc->cur++ = len >> 56;
151	*enc->cur++ = len >> 48;	268	*enc->cur++ = len >> 48;
152	*enc->cur++ = len >> 40;	269	*enc->cur++ = len >> 40;
153	*enc->cur++ = len >> 32;	270	*enc->cur++ = len >> 32;
154	*enc->cur++ = len >> 24;	271	*enc->cur++ = len >> 24;
…		…
156	*enc->cur++ = len >> 8;	273	*enc->cur++ = len >> 8;
157	*enc->cur++ = len;	274	*enc->cur++ = len;
158	}	275	}
159	}	276	}
160		277
161	static void	278	ecb_inline void
		279	encode_tag (enc_t *enc, UV tag)
		280	{
		281	encode_uint (enc, MAJOR_TAG, tag);
		282	}
		283
		284	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		285	ecb_noinline static void
162	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	286	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
163	{	287	{
164	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	288	STRLEN ulen = len;
		289	U8 *p, *pend = (U8 *)str + len;
		290
		291	for (p = (U8 *)str; p < pend; ++p)
		292	ulen += *p >> 7; // count set high bits
		293
		294	encode_uint (enc, MAJOR_TEXT, ulen);
		295
		296	need (enc, ulen);
		297	for (p = (U8 *)str; p < pend; ++p)
		298	if (*p < 0x80)
		299	*enc->cur++ = *p;
		300	else
		301	{
		302	*enc->cur++ = 0xc0 + (*p >> 6);
		303	*enc->cur++ = 0x80 + (*p & 63);
		304	}
		305	}
		306
		307	ecb_inline void
		308	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		309	{
		310	if (ecb_expect_false (upgrade_utf8))
		311	if (!utf8)
		312	{
		313	encode_str_utf8 (enc, utf8, str, len);
		314	return;
		315	}
		316
		317	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
165	need (enc, len);	318	need (enc, len);
166	memcpy (enc->cur, str, len);	319	memcpy (enc->cur, str, len);
167	enc->cur += len;	320	enc->cur += len;
168	}	321	}
169		322
		323	ecb_inline void
		324	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		325	{
		326	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		327	{
		328	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		329
		330	if (SvOK (*svp))
		331	{
		332	// already registered, use stringref
		333	encode_tag (enc, CBOR_TAG_STRINGREF);
		334	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		335	return;
		336	}
		337	else if (len >= minimum_string_length (enc->stringref_idx))
		338	{
		339	// register only
		340	sv_setuv (*svp, enc->stringref_idx);
		341	++enc->stringref_idx;
		342	}
		343	}
		344
		345	encode_str (enc, upgrade_utf8, utf8, str, len);
		346	}
		347
170	static void encode_sv (enc_t *enc, SV *sv);	348	static void encode_sv (enc_t *enc, SV *sv);
171		349
172	static void	350	static void
173	encode_av (enc_t *enc, AV *av)	351	encode_av (enc_t *enc, AV *av)
174	{	352	{
…		…
177	if (enc->depth >= enc->cbor.max_depth)	355	if (enc->depth >= enc->cbor.max_depth)
178	croak (ERR_NESTING_EXCEEDED);	356	croak (ERR_NESTING_EXCEEDED);
179		357
180	++enc->depth;	358	++enc->depth;
181		359
182	encode_uint (enc, 0x80, len + 1);	360	encode_uint (enc, MAJOR_ARRAY, len + 1);
183		361
		362	if (ecb_expect_false (SvMAGICAL (av)))
184	for (i = 0; i <= len; ++i)	363	for (i = 0; i <= len; ++i)
185	{	364	{
186	SV **svp = av_fetch (av, i, 0);	365	SV **svp = av_fetch (av, i, 0);
187	encode_sv (enc, svp ? *svp : &PL_sv_undef);	366	encode_sv (enc, svp ? *svp : &PL_sv_undef);
188	}	367	}
		368	else
		369	for (i = 0; i <= len; ++i)
		370	{
		371	SV *sv = AvARRAY (av)[i];
		372	encode_sv (enc, sv ? sv : &PL_sv_undef);
		373	}
189		374
190	--enc->depth;	375	--enc->depth;
191	}	376	}
192		377
193	static void	378	static void
…		…
201	++enc->depth;	386	++enc->depth;
202		387
203	int pairs = hv_iterinit (hv);	388	int pairs = hv_iterinit (hv);
204	int mg = SvMAGICAL (hv);	389	int mg = SvMAGICAL (hv);
205		390
206	if (mg)	391	if (ecb_expect_false (mg))
207	encode_ch (enc, 0xa0 | 31);	392	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
208	else	393	else
209	encode_uint (enc, 0xa0, pairs);	394	encode_uint (enc, MAJOR_MAP, pairs);
210		395
211	while ((he = hv_iternext (hv)))	396	while ((he = hv_iternext (hv)))
212	{	397	{
213	if (HeKLEN (he) == HEf_SVKEY)	398	if (HeKLEN (he) == HEf_SVKEY)
214	encode_sv (enc, HeSVKEY (he));	399	encode_sv (enc, HeSVKEY (he));
215	else	400	else
216	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	401	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
217		402
218	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	403	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
219	}	404	}
220		405
221	if (mg)	406	if (ecb_expect_false (mg))
222	encode_ch (enc, 0xe0 | 31);	407	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
223		408
224	--enc->depth;	409	--enc->depth;
225	}	410	}
226		411
227	// encode objects, arrays and special \0=false and \1=true values.	412	// encode objects, arrays and special \0=false and \1=true values.
228	static void	413	static void
229	encode_rv (enc_t *enc, SV *sv)	414	encode_rv (enc_t *enc, SV *sv)
230	{	415	{
231	svtype svt;
232
233	SvGETMAGIC (sv);	416	SvGETMAGIC (sv);
		417
234	svt = SvTYPE (sv);	418	svtype svt = SvTYPE (sv);
235		419
236	if (ecb_expect_false (SvOBJECT (sv)))	420	if (ecb_expect_false (SvOBJECT (sv)))
237	{	421	{
238	HV *stash = !CBOR_SLOW || cbor_boolean_stash	422	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
239	? cbor_boolean_stash	423	? types_boolean_stash
		424	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		425	HV *error_stash = !CBOR_SLOW || types_error_stash
		426	? types_error_stash
		427	: gv_stashpv ("Types::Serialiser::Error", 1);
		428	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		429	? cbor_tagged_stash
240	: gv_stashpv ("CBOR::XS::Boolean", 1);	430	: gv_stashpv ("CBOR::XS::Tagged" , 1);
241		431
242	if (SvSTASH (sv) == stash)	432	HV *stash = SvSTASH (sv);
243	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	433
		434	if (stash == boolean_stash)
		435	{
		436	encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		437	return;
		438	}
		439	else if (stash == error_stash)
		440	{
		441	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		442	return;
		443	}
		444	else if (stash == tagged_stash)
		445	{
		446	if (svt != SVt_PVAV)
		447	croak ("encountered CBOR::XS::Tagged object that isn't an array");
		448
		449	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
		450	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		451
		452	return;
		453	}
		454	}
		455
		456	if (ecb_expect_false (SvREFCNT (sv) > 1)
		457	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		458	{
		459	if (ecb_expect_false (!enc->shareable))
		460	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		461
		462	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		463
		464	if (SvOK (*svp))
		465	{
		466	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		467	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		468	return;
		469	}
244	else	470	else
245	{	471	{
246	#if 0 //TODO	472	sv_setuv (*svp, enc->shareable_idx);
247	if (enc->cbor.flags & F_CONV_BLESSED)	473	++enc->shareable_idx;
		474	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		475	}
		476	}
		477
		478	if (ecb_expect_false (SvOBJECT (sv)))
		479	{
		480	HV *stash = SvSTASH (sv);
		481	GV *method;
		482
		483	if (enc->cbor.flags & F_FORBID_OBJECTS)
		484	croak ("encountered object '%s', but forbid_objects is enabled",
		485	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		486	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
248	{	487	{
		488	dSP;
		489
		490	ENTER; SAVETMPS;
		491	PUSHMARK (SP);
249	// we re-bless the reference to get overload and other niceties right	492	// we re-bless the reference to get overload and other niceties right
250	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
251
252	if (to_cbor)
253	{
254	dSP;
255
256	ENTER; SAVETMPS; PUSHMARK (SP);
257	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	493	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
258		494
259	// calling with G_SCALAR ensures that we always get a 1 return value
260	PUTBACK;	495	PUTBACK;
		496	// G_SCALAR ensures that return value is 1
261	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	497	call_sv ((SV *)GvCV (method), G_SCALAR);
262	SPAGAIN;	498	SPAGAIN;
263		499
264	// catch this surprisingly common error	500	// catch this surprisingly common error
265	if (SvROK (TOPs) && SvRV (TOPs) == sv)	501	if (SvROK (TOPs) && SvRV (TOPs) == sv)
266	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	502	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
267		503
268	sv = POPs;
269	PUTBACK;
270
271	encode_sv (enc, sv);	504	encode_sv (enc, POPs);
272		505
		506	PUTBACK;
		507
273	FREETMPS; LEAVE;	508	FREETMPS; LEAVE;
274	}
275	else if (enc->cbor.flags & F_ALLOW_BLESSED)
276	encode_str (enc, "null", 4, 0);
277	else
278	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it",
279	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
280	}	509	}
281	else if (enc->cbor.flags & F_ALLOW_BLESSED)	510	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
282	encode_str (enc, "null", 4, 0);	511	{
		512	dSP;
		513
		514	ENTER; SAVETMPS;
		515	SAVESTACK_POS ();
		516	PUSHMARK (SP);
		517	EXTEND (SP, 2);
		518	// we re-bless the reference to get overload and other niceties right
		519	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		520	PUSHs (sv_cbor);
		521
		522	PUTBACK;
		523	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		524	SPAGAIN;
		525
		526	// catch this surprisingly common error
		527	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		528	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		529
		530	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		531	encode_uint (enc, MAJOR_ARRAY, count + 1);
		532	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		533
		534	while (count)
		535	encode_sv (enc, SP[1 - count--]);
		536
		537	PUTBACK;
		538
		539	FREETMPS; LEAVE;
		540	}
283	else	541	else
284	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	542	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
285	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	543	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
286	#endif
287	}
288	}	544	}
289	else if (svt == SVt_PVHV)	545	else if (svt == SVt_PVHV)
290	encode_hv (enc, (HV *)sv);	546	encode_hv (enc, (HV *)sv);
291	else if (svt == SVt_PVAV)	547	else if (svt == SVt_PVAV)
292	encode_av (enc, (AV *)sv);	548	encode_av (enc, (AV *)sv);
293	else if (svt < SVt_PVAV)
294	{
295	STRLEN len = 0;
296	char *pv = svt ? SvPV (sv, len) : 0;
297
298	if (len == 1 && *pv == '1')
299	encode_ch (enc, 0xe0 | 21);
300	else if (len == 1 && *pv == '0')
301	encode_ch (enc, 0xe0 | 20);
302	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
303	encode_ch (enc, 0xe0 | 23);
304	else
305	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
306	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
307	}
308	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
309	encode_ch (enc, 0xe0 | 23);
310	else	549	else
311	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	550	{
312	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	551	encode_tag (enc, CBOR_TAG_INDIRECTION);
		552	encode_sv (enc, sv);
		553	}
313	}	554	}
314		555
315	static void	556	static void
316	encode_nv (enc_t *enc, SV *sv)	557	encode_nv (enc_t *enc, SV *sv)
317	{	558	{
318	double nv = SvNVX (sv);	559	double nv = SvNVX (sv);
319		560
320	need (enc, 9);	561	need (enc, 9);
321		562
322	if (ecb_expect_false (nv == (U32)nv))	563	if (ecb_expect_false (nv == (NV)(U32)nv))
323	encode_uint (enc, 0x00, (U32)nv);	564	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
324	//TODO: maybe I32?	565	//TODO: maybe I32?
325	else if (ecb_expect_false (nv == (float)nv))	566	else if (ecb_expect_false (nv == (float)nv))
326	{	567	{
		568	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
		569
327	uint32_t fp = ecb_float_to_binary32 (nv);	570	uint32_t fp = ecb_float_to_binary32 (nv);
328
329	*enc->cur++ = 0xe0 | 26;
330		571
331	if (!ecb_big_endian ())	572	if (!ecb_big_endian ())
332	fp = ecb_bswap32 (fp);	573	fp = ecb_bswap32 (fp);
333		574
334	memcpy (enc->cur, &fp, 4);	575	memcpy (enc->cur, &fp, 4);
335	enc->cur += 4;	576	enc->cur += 4;
336	}	577	}
337	else	578	else
338	{	579	{
		580	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
		581
339	uint64_t fp = ecb_double_to_binary64 (nv);	582	uint64_t fp = ecb_double_to_binary64 (nv);
340
341	*enc->cur++ = 0xe0 | 27;
342		583
343	if (!ecb_big_endian ())	584	if (!ecb_big_endian ())
344	fp = ecb_bswap64 (fp);	585	fp = ecb_bswap64 (fp);
345		586
346	memcpy (enc->cur, &fp, 8);	587	memcpy (enc->cur, &fp, 8);
…		…
355		596
356	if (SvPOKp (sv))	597	if (SvPOKp (sv))
357	{	598	{
358	STRLEN len;	599	STRLEN len;
359	char *str = SvPV (sv, len);	600	char *str = SvPV (sv, len);
360	encode_str (enc, SvUTF8 (sv), str, len);	601	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
361	}	602	}
362	else if (SvNOKp (sv))	603	else if (SvNOKp (sv))
363	encode_nv (enc, sv);	604	encode_nv (enc, sv);
364	else if (SvIOKp (sv))	605	else if (SvIOKp (sv))
365	{	606	{
366	if (SvIsUV (sv))	607	if (SvIsUV (sv))
367	encode_uint (enc, 0x00, SvUVX (sv));	608	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
368	else if (SvIVX (sv) >= 0)	609	else if (SvIVX (sv) >= 0)
369	encode_uint (enc, 0x00, SvIVX (sv));	610	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
370	else	611	else
371	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));	612	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
372	}	613	}
373	else if (SvROK (sv))	614	else if (SvROK (sv))
374	encode_rv (enc, SvRV (sv));	615	encode_rv (enc, SvRV (sv));
375	else if (!SvOK (sv))	616	else if (!SvOK (sv))
376	encode_ch (enc, 0xe0 | 22);	617	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
377	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	618	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
378	encode_ch (enc, 0xe0 | 23);	619	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
379	else	620	else
380	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	621	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
381	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	622	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
382	}	623	}
383		624
384	static SV *	625	static SV *
385	encode_cbor (SV *scalar, CBOR *cbor)	626	encode_cbor (SV *scalar, CBOR *cbor)
386	{	627	{
387	enc_t enc;	628	enc_t enc = { 0 };
388		629
389	enc.cbor = *cbor;	630	enc.cbor = *cbor;
390	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	631	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
391	enc.cur = SvPVX (enc.sv);	632	enc.cur = SvPVX (enc.sv);
392	enc.end = SvEND (enc.sv);	633	enc.end = SvEND (enc.sv);
393	enc.depth = 0;
394		634
395	SvPOK_only (enc.sv);	635	SvPOK_only (enc.sv);
		636
		637	if (cbor->flags & F_PACK_STRINGS)
		638	{
		639	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		640	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		641	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		642	}
		643
396	encode_sv (&enc, scalar);	644	encode_sv (&enc, scalar);
397		645
398	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	646	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
399	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	647	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
400		648
…		…
414	U8 *end; // end of input string	662	U8 *end; // end of input string
415	const char *err; // parse error, if != 0	663	const char *err; // parse error, if != 0
416	CBOR cbor;	664	CBOR cbor;
417	U32 depth; // recursion depth	665	U32 depth; // recursion depth
418	U32 maxdepth; // recursion depth limit	666	U32 maxdepth; // recursion depth limit
		667	AV *shareable;
		668	AV *stringref;
		669	SV *decode_tagged;
		670	SV *err_sv; // optional sv for error, needs to be freed
419	} dec_t;	671	} dec_t;
420		672
421	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	673	// set dec->err to ERRSV
		674	ecb_cold static void
		675	err_errsv (dec_t *dec)
		676	{
		677	if (!dec->err)
		678	{
		679	dec->err_sv = newSVsv (ERRSV);
422		680
423	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	681	// chop off the trailing \n
		682	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		683	*SvEND (dec->err_sv) = 0;
424		684
		685	dec->err = SvPVutf8_nolen (dec->err_sv);
		686	}
		687	}
		688
		689	// the following functions are used to reduce code size and help the compiler to optimise
		690	ecb_cold static void
		691	err_set (dec_t *dec, const char *reason)
		692	{
		693	if (!dec->err)
		694	dec->err = reason;
		695	}
		696
		697	ecb_cold static void
		698	err_unexpected_end (dec_t *dec)
		699	{
		700	err_set (dec, "unexpected end of CBOR data");
		701	}
		702
		703	#define ERR_DO(do) SB do; goto fail; SE
		704	#define ERR(reason) ERR_DO (err_set (dec, reason))
		705	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		706
		707	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		708
425	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	709	#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED)
426	#define DEC_DEC_DEPTH --dec->depth	710	#define DEC_DEC_DEPTH --dec->depth
427		711
428	static UV	712	static UV
429	decode_uint (dec_t *dec)	713	decode_uint (dec_t *dec)
430	{	714	{
431	switch (*dec->cur & 31)	715	U8 m = *dec->cur & MINOR_MASK;
432	{	716	++dec->cur;
433	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
434	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
435	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
436	return *dec->cur++ & 31;
437		717
438	case 24:	718	if (ecb_expect_true (m < LENGTH_EXT1))
		719	return m;
		720	else if (ecb_expect_true (m == LENGTH_EXT1))
		721	{
439	WANT (2);	722	WANT (1);
440	dec->cur += 2;	723	dec->cur += 1;
441	return dec->cur[-1];	724	return dec->cur[-1];
442		725	}
443	case 25:	726	else if (ecb_expect_true (m == LENGTH_EXT2))
		727	{
444	WANT (3);	728	WANT (2);
445	dec->cur += 3;	729	dec->cur += 2;
446	return (((UV)dec->cur[-2]) << 8)	730	return (((UV)dec->cur[-2]) << 8)
447	| ((UV)dec->cur[-1]);	731	| ((UV)dec->cur[-1]);
448		732	}
449	case 26:	733	else if (ecb_expect_true (m == LENGTH_EXT4))
		734	{
450	WANT (5);	735	WANT (4);
451	dec->cur += 5;	736	dec->cur += 4;
452	return (((UV)dec->cur[-4]) << 24)	737	return (((UV)dec->cur[-4]) << 24)
453	| (((UV)dec->cur[-3]) << 16)	738	| (((UV)dec->cur[-3]) << 16)
454	| (((UV)dec->cur[-2]) << 8)	739	| (((UV)dec->cur[-2]) << 8)
455	| ((UV)dec->cur[-1]);	740	| ((UV)dec->cur[-1]);
456		741	}
457	case 27:	742	else if (ecb_expect_true (m == LENGTH_EXT8))
		743	{
458	WANT (9);	744	WANT (8);
459	dec->cur += 9;	745	dec->cur += 8;
		746
		747	return
		748	#if UVSIZE < 8
		749	0
		750	#else
460	return (((UV)dec->cur[-8]) << 56)	751	(((UV)dec->cur[-8]) << 56)
461	| (((UV)dec->cur[-7]) << 48)	752	| (((UV)dec->cur[-7]) << 48)
462	| (((UV)dec->cur[-6]) << 40)	753	| (((UV)dec->cur[-6]) << 40)
463	| (((UV)dec->cur[-5]) << 32)	754	| (((UV)dec->cur[-5]) << 32)
		755	#endif
464	| (((UV)dec->cur[-4]) << 24)	756	| (((UV)dec->cur[-4]) << 24)
465	| (((UV)dec->cur[-3]) << 16)	757	| (((UV)dec->cur[-3]) << 16)
466	| (((UV)dec->cur[-2]) << 8)	758	| (((UV)dec->cur[-2]) << 8)
467	| ((UV)dec->cur[-1]);	759	| ((UV)dec->cur[-1]);
468		760	}
469	default:	761	else
470	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	762	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
471	}
472		763
473	fail:	764	fail:
474	return 0;	765	return 0;
475	}	766	}
476		767
…		…
481	{	772	{
482	AV *av = newAV ();	773	AV *av = newAV ();
483		774
484	DEC_INC_DEPTH;	775	DEC_INC_DEPTH;
485		776
486	if ((*dec->cur & 31) == 31)	777	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
487	{	778	{
488	++dec->cur;	779	++dec->cur;
489		780
490	for (;;)	781	for (;;)
491	{	782	{
492	WANT (1);	783	WANT (1);
493		784
494	if (*dec->cur == (0xe0 | 31))	785	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
495	{	786	{
496	++dec->cur;	787	++dec->cur;
497	break;	788	break;
498	}	789	}
499		790
500	av_push (av, decode_sv (dec));	791	av_push (av, decode_sv (dec));
501	}	792	}
502	}	793	}
503	else	794	else
504	{	795	{
505	int i, len = decode_uint (dec);	796	UV i, len = decode_uint (dec);
506		797
		798	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
507	av_fill (av, len - 1);	799	av_fill (av, len - 1);
508		800
509	for (i = 0; i < len; ++i)	801	for (i = 0; i < len; ++i)
510	AvARRAY (av)[i] = decode_sv (dec);	802	AvARRAY (av)[i] = decode_sv (dec);
511	}	803	}
512		804
513	DEC_DEC_DEPTH;	805	DEC_DEC_DEPTH;
514	return newRV_noinc ((SV *)av);	806	return newRV_noinc ((SV *)av);
515		807
516	fail:	808	fail:
517	SvREFCNT_dec (av);	809	SvREFCNT_dec_NN (av);
518	DEC_DEC_DEPTH;	810	DEC_DEC_DEPTH;
519	return &PL_sv_undef;	811	return &PL_sv_undef;
520	}	812	}
521		813
		814	static void
		815	decode_he (dec_t *dec, HV *hv)
		816	{
		817	// for speed reasons, we specialcase single-string
		818	// byte or utf-8 strings as keys, but only when !stringref
		819
		820	if (ecb_expect_true (!dec->stringref))
		821	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		822	{
		823	STRLEN len = decode_uint (dec);
		824	char *key = (char *)dec->cur;
		825
		826	WANT (len);
		827	dec->cur += len;
		828
		829	hv_store (hv, key, len, decode_sv (dec), 0);
		830
		831	return;
		832	}
		833	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		834	{
		835	STRLEN len = decode_uint (dec);
		836	char *key = (char *)dec->cur;
		837
		838	WANT (len);
		839	dec->cur += len;
		840
		841	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		842	if (!is_utf8_string (key, len))
		843	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		844
		845	hv_store (hv, key, -len, decode_sv (dec), 0);
		846
		847	return;
		848	}
		849
		850	SV *k = decode_sv (dec);
		851	SV *v = decode_sv (dec);
		852
		853	// we leak memory if uncaught exceptions are thrown by random magical
		854	// methods, and this is hopefully the only place where it can happen,
		855	// so if there is a chance of an exception, take the very slow path.
		856	// since catching exceptions is "undocumented/internal/forbidden" by
		857	// the new p5p powers, we need to call out to a perl function :/
		858	if (ecb_expect_false (SvAMAGIC (k)))
		859	{
		860	dSP;
		861
		862	ENTER; SAVETMPS;
		863	PUSHMARK (SP);
		864	EXTEND (SP, 3);
		865	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		866	PUSHs (sv_2mortal (k));
		867	PUSHs (sv_2mortal (v));
		868
		869	PUTBACK;
		870	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		871	SPAGAIN;
		872
		873	FREETMPS; LEAVE;
		874
		875	if (SvTRUE (ERRSV))
		876	ERR_ERRSV;
		877
		878	return;
		879	}
		880
		881	hv_store_ent (hv, k, v, 0);
		882	SvREFCNT_dec_NN (k);
		883
		884	fail:
		885	;
		886	}
		887
522	static SV *	888	static SV *
523	decode_hv (dec_t *dec)	889	decode_hv (dec_t *dec)
524	{	890	{
525	HV *hv = newHV ();	891	HV *hv = newHV ();
526		892
527	DEC_INC_DEPTH;	893	DEC_INC_DEPTH;
528		894
529	if ((*dec->cur & 31) == 31)	895	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
530	{	896	{
531	++dec->cur;	897	++dec->cur;
532		898
533	for (;;)	899	for (;;)
534	{	900	{
535	WANT (1);	901	WANT (1);
536		902
537	if (*dec->cur == (0xe0 | 31))	903	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
538	{	904	{
539	++dec->cur;	905	++dec->cur;
540	break;	906	break;
541	}	907	}
542		908
543	SV *k = decode_sv (dec);	909	decode_he (dec, hv);
544	SV *v = decode_sv (dec);
545
546	hv_store_ent (hv, k, v, 0);
547	}	910	}
548	}	911	}
549	else	912	else
550	{	913	{
551	int len = decode_uint (dec);	914	UV pairs = decode_uint (dec);
552		915
		916	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		917
553	while (len--)	918	while (pairs--)
554	{	919	decode_he (dec, hv);
555	SV *k = decode_sv (dec);
556	SV *v = decode_sv (dec);
557
558	hv_store_ent (hv, k, v, 0);
559	}
560	}	920	}
561		921
562	DEC_DEC_DEPTH;	922	DEC_DEC_DEPTH;
563	return newRV_noinc ((SV *)hv);	923	return newRV_noinc ((SV *)hv);
564		924
565	#if 0	925	fail:
566	SV *sv;	926	SvREFCNT_dec_NN (hv);
567	HV *hv = newHV ();
568
569	DEC_INC_DEPTH;	927	DEC_DEC_DEPTH;
570	decode_ws (dec);	928	return &PL_sv_undef;
		929	}
571		930
572	for (;;)	931	static SV *
573	{	932	decode_str (dec_t *dec, int utf8)
574	// heuristic: assume that	933	{
575	// a) decode_str + hv_store_ent are abysmally slow.	934	SV *sv = 0;
576	// b) most hash keys are short, simple ascii text.	935
577	// => try to "fast-match" such strings to avoid	936	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
578	// the overhead of decode_str + hv_store_ent.
579	{	937	{
580	SV *value;	938	// indefinite length strings
581	char *p = dec->cur;	939	++dec->cur;
582	char *e = p + 24; // only try up to 24 bytes
583		940
		941	U8 major = *dec->cur & MAJOR_MISC;
		942
		943	sv = newSVpvn ("", 0);
		944
584	for (;;)	945	for (;;)
585	{	946	{
586	// the >= 0x80 is false on most architectures	947	WANT (1);
587	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')	948
		949	if ((*dec->cur - major) > LENGTH_EXT8)
		950	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
588	{	951	{
589	// slow path, back up and use decode_str	952	++dec->cur;
590	SV *key = decode_str (dec);
591	if (!key)
592	goto fail;
593
594	decode_ws (dec); EXPECT_CH (':');
595
596	decode_ws (dec);
597	value = decode_sv (dec);
598	if (!value)
599	{
600	SvREFCNT_dec (key);
601	goto fail;
602	}
603
604	hv_store_ent (hv, key, value, 0);
605	SvREFCNT_dec (key);
606
607	break;	953	break;
608	}	954	}
609	else if (*p == '"')
610	{
611	// fast path, got a simple key
612	char *key = dec->cur;
613	int len = p - key;
614	dec->cur = p + 1;
615
616	decode_ws (dec); EXPECT_CH (':');
617
618	decode_ws (dec);
619	value = decode_sv (dec);
620	if (!value)
621	goto fail;
622
623	hv_store (hv, key, len, value, 0);
624
625	break;
626	}
627
628	++p;
629	}
630	}
631
632	decode_ws (dec);
633
634	if (*dec->cur == '}')
635	{
636	++dec->cur;
637	break;
638	}
639
640	if (*dec->cur != ',')
641	ERR (", or } expected while parsing object/hash");
642
643	++dec->cur;
644
645	decode_ws (dec);
646
647	if (*dec->cur == '}' && dec->cbor.flags & F_RELAXED)
648	{
649	++dec->cur;
650	break;
651	}
652	}
653
654	DEC_DEC_DEPTH;
655	sv = newRV_noinc ((SV *)hv);
656
657	// check filter callbacks
658	if (dec->cbor.flags & F_HOOK)
659	{
660	if (dec->cbor.cb_sk_object && HvKEYS (hv) == 1)
661	{
662	HE *cb, *he;
663
664	hv_iterinit (hv);
665	he = hv_iternext (hv);
666	hv_iterinit (hv);
667
668	// the next line creates a mortal sv each time its called.
669	// might want to optimise this for common cases.
670	cb = hv_fetch_ent (dec->cbor.cb_sk_object, hv_iterkeysv (he), 0, 0);
671
672	if (cb)
673	{	955	else
674	dSP;	956	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
675	int count;
676		957
677	ENTER; SAVETMPS; PUSHMARK (SP);	958	STRLEN len = decode_uint (dec);
678	XPUSHs (HeVAL (he));
679	sv_2mortal (sv);
680		959
681	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
682
683	if (count == 1)
684	{
685	sv = newSVsv (POPs);
686	FREETMPS; LEAVE;
687	return sv;
688	}
689
690	SvREFCNT_inc (sv);
691	FREETMPS; LEAVE;
692	}
693	}
694
695	if (dec->cbor.cb_object)
696	{
697	dSP;
698	int count;
699
700	ENTER; SAVETMPS; PUSHMARK (SP);
701	XPUSHs (sv_2mortal (sv));
702
703	PUTBACK; count = call_sv (dec->cbor.cb_object, G_ARRAY); SPAGAIN;
704
705	if (count == 1)
706	{
707	sv = newSVsv (POPs);
708	FREETMPS; LEAVE;
709	return sv;
710	}
711
712	SvREFCNT_inc (sv);
713	FREETMPS; LEAVE;
714	}
715	}
716
717	return sv;
718	#endif
719
720	fail:
721	SvREFCNT_dec (hv);
722	DEC_DEC_DEPTH;
723	return &PL_sv_undef;
724	}
725
726	static SV *
727	decode_str (dec_t *dec, int utf8)
728	{
729	SV *sv;
730
731	if ((*dec->cur & 31) == 31)
732	{
733	++dec->cur;
734
735	sv = newSVpvn ("", 0);
736
737	// not very fast, and certainly not robust against illegal input
738	for (;;)
739	{
740	WANT (1);	960	WANT (len);
741		961	sv_catpvn (sv, dec->cur, len);
742	if (*dec->cur == (0xe0 | 31))	962	dec->cur += len;
743	{
744	++dec->cur;
745	break;
746	}
747
748	SV *sv2 = decode_sv (dec);
749	sv_catsv (sv, sv2);
750	}	963	}
751	}	964	}
752	else	965	else
753	{	966	{
754	STRLEN len = decode_uint (dec);	967	STRLEN len = decode_uint (dec);
755		968
756	WANT (len);	969	WANT (len);
757	sv = newSVpvn (dec->cur, len);	970	sv = newSVpvn (dec->cur, len);
758	dec->cur += len;	971	dec->cur += len;
		972
		973	if (ecb_expect_false (dec->stringref)
		974	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		975	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
759	}	976	}
760		977
761	if (utf8)	978	if (utf8)
		979	{
		980	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		981	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		982	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		983
762	SvUTF8_on (sv);	984	SvUTF8_on (sv);
		985	}
763		986
764	return sv;	987	return sv;
765		988
766	fail:	989	fail:
		990	SvREFCNT_dec (sv);
767	return &PL_sv_undef;	991	return &PL_sv_undef;
768	}	992	}
769		993
770	static SV *	994	static SV *
771	decode_tagged (dec_t *dec)	995	decode_tagged (dec_t *dec)
772	{	996	{
		997	SV *sv = 0;
773	UV tag = decode_uint (dec);	998	UV tag = decode_uint (dec);
		999
		1000	WANT (1);
		1001
		1002	switch (tag)
		1003	{
		1004	case CBOR_TAG_MAGIC:
774	SV *sv = decode_sv (dec);	1005	sv = decode_sv (dec);
		1006	break;
775		1007
776	if (tag == 55799) // 2.4.5 Self-Describe CBOR	1008	case CBOR_TAG_INDIRECTION:
		1009	sv = newRV_noinc (decode_sv (dec));
		1010	break;
		1011
		1012	case CBOR_TAG_STRINGREF_NAMESPACE:
		1013	{
		1014	// do not use SAVETMPS/FREETMPS, as these will
		1015	// erase mortalised caches, e.g. "shareable"
		1016	ENTER;
		1017
		1018	SAVESPTR (dec->stringref);
		1019	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1020
		1021	sv = decode_sv (dec);
		1022
		1023	LEAVE;
		1024	}
		1025	break;
		1026
		1027	case CBOR_TAG_STRINGREF:
		1028	{
		1029	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1030	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1031
		1032	UV idx = decode_uint (dec);
		1033
		1034	if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
		1035	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1036
		1037	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1038	}
		1039	break;
		1040
		1041	case CBOR_TAG_VALUE_SHAREABLE:
		1042	{
		1043	if (ecb_expect_false (!dec->shareable))
		1044	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1045
		1046	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1047	{
		1048	sv = newSV (0);
		1049	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1050
		1051	SV *osv = decode_sv (dec);
		1052	sv_setsv (sv, osv);
		1053	SvREFCNT_dec_NN (osv);
		1054	}
		1055	else
		1056	{
		1057	av_push (dec->shareable, &PL_sv_undef);
		1058	int idx = AvFILLp (dec->shareable);
		1059	sv = decode_sv (dec);
		1060	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1061	}
		1062	}
		1063	break;
		1064
		1065	case CBOR_TAG_VALUE_SHAREDREF:
		1066	{
		1067	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1068	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1069
		1070	UV idx = decode_uint (dec);
		1071
		1072	if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
		1073	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1074
		1075	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1076
		1077	if (sv == &PL_sv_undef)
		1078	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1079	}
		1080	break;
		1081
		1082	case CBOR_TAG_PERL_OBJECT:
		1083	{
		1084	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1085	goto filter;
		1086
		1087	sv = decode_sv (dec);
		1088
		1089	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1090	ERR ("corrupted CBOR data (non-array perl object)");
		1091
		1092	AV *av = (AV *)SvRV (sv);
		1093	int len = av_len (av) + 1;
		1094	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1095
		1096	if (!stash)
		1097	ERR ("cannot decode perl-object (package does not exist)");
		1098
		1099	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1100
		1101	if (!method)
		1102	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1103
		1104	dSP;
		1105
		1106	ENTER; SAVETMPS;
		1107	PUSHMARK (SP);
		1108	EXTEND (SP, len + 1);
		1109	// we re-bless the reference to get overload and other niceties right
		1110	PUSHs (*av_fetch (av, 0, 1));
		1111	PUSHs (sv_cbor);
		1112
		1113	int i;
		1114
		1115	for (i = 1; i < len; ++i)
		1116	PUSHs (*av_fetch (av, i, 1));
		1117
		1118	PUTBACK;
		1119	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1120	SPAGAIN;
		1121
		1122	if (SvTRUE (ERRSV))
		1123	{
		1124	FREETMPS; LEAVE;
		1125	ERR_ERRSV;
		1126	}
		1127
		1128	SvREFCNT_dec_NN (sv);
		1129	sv = SvREFCNT_inc (POPs);
		1130
		1131	PUTBACK;
		1132
		1133	FREETMPS; LEAVE;
		1134	}
		1135	break;
		1136
		1137	default:
		1138	filter:
		1139	{
		1140	SV *tag_sv = newSVuv (tag);
		1141
		1142	sv = decode_sv (dec);
		1143
		1144	dSP;
		1145	ENTER; SAVETMPS;
		1146	SAVESTACK_POS ();
		1147	PUSHMARK (SP);
		1148	EXTEND (SP, 2);
		1149	PUSHs (tag_sv);
		1150	PUSHs (sv);
		1151
		1152	PUTBACK;
		1153	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1154	SPAGAIN;
		1155
		1156	if (SvTRUE (ERRSV))
		1157	{
		1158	SvREFCNT_dec_NN (tag_sv);
		1159	FREETMPS; LEAVE;
		1160	ERR_ERRSV;
		1161	}
		1162
		1163	if (count)
		1164	{
		1165	SvREFCNT_dec_NN (tag_sv);
		1166	SvREFCNT_dec_NN (sv);
		1167	sv = SvREFCNT_inc_NN (POPs);
		1168	}
		1169	else
		1170	{
		1171	AV *av = newAV ();
		1172	av_push (av, tag_sv);
		1173	av_push (av, sv);
		1174
		1175	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1176	? cbor_tagged_stash
		1177	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1178	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1179	}
		1180
		1181	PUTBACK;
		1182
		1183	FREETMPS; LEAVE;
		1184	}
		1185	break;
		1186	}
		1187
777	return sv;	1188	return sv;
778		1189
779	AV *av = newAV ();	1190	fail:
780	av_push (av, newSVuv (tag));	1191	SvREFCNT_dec (sv);
781	av_push (av, sv);	1192	return &PL_sv_undef;
782	return newRV_noinc ((SV *)av);
783	}	1193	}
784		1194
785	static SV *	1195	static SV *
786	decode_sv (dec_t *dec)	1196	decode_sv (dec_t *dec)
787	{	1197	{
788	WANT (1);	1198	WANT (1);
789		1199
790	switch (*dec->cur >> 5)	1200	switch (*dec->cur >> MAJOR_SHIFT)
791	{	1201	{
792	case 0: // unsigned int	1202	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
793	//TODO: 64 bit values on 3 2bit perls	1203	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
794	return newSVuv (decode_uint (dec));	1204	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
795	case 1: // negative int	1205	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
796	return newSViv (-1 - (IV)decode_uint (dec));	1206	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
797	case 2: // octet string	1207	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
798	return decode_str (dec, 0);	1208	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
799	case 3: // utf-8 string	1209
800	return decode_str (dec, 1);	1210	case MAJOR_MISC >> MAJOR_SHIFT:
801	case 4: // array
802	return decode_av (dec);
803	case 5: // map
804	return decode_hv (dec);
805	case 6: // tag
806	return decode_tagged (dec);
807	case 7: // misc
808	switch (*dec->cur++ & 31)	1211	switch (*dec->cur++ & MINOR_MASK)
809	{	1212	{
810	case 20:	1213	case SIMPLE_FALSE:
811	#if CBOR_SLOW	1214	#if CBOR_SLOW
812	cbor_false = get_bool ("CBOR::XS::false");	1215	types_false = get_bool ("Types::Serialiser::false");
813	#endif	1216	#endif
814	return newSVsv (cbor_false);	1217	return newSVsv (types_false);
815	case 21:	1218	case SIMPLE_TRUE:
816	#if CBOR_SLOW	1219	#if CBOR_SLOW
817	cbor_true = get_bool ("CBOR::XS::true");	1220	types_true = get_bool ("Types::Serialiser::true");
818	#endif	1221	#endif
819	return newSVsv (cbor_true);	1222	return newSVsv (types_true);
820	case 22:	1223	case SIMPLE_NULL:
821	return newSVsv (&PL_sv_undef);	1224	return newSVsv (&PL_sv_undef);
		1225	case SIMPLE_UNDEF:
		1226	#if CBOR_SLOW
		1227	types_error = get_bool ("Types::Serialiser::error");
		1228	#endif
		1229	return newSVsv (types_error);
822		1230
823	case 25:	1231	case MISC_FLOAT16:
824	{	1232	{
825	WANT (2);	1233	WANT (2);
826		1234
827	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1235	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
828	dec->cur += 2;	1236	dec->cur += 2;
829		1237
830	return newSVnv (ecb_binary16_to_float (fp));	1238	return newSVnv (ecb_binary16_to_float (fp));
831	}	1239	}
832		1240
833	case 26:	1241	case MISC_FLOAT32:
834	{	1242	{
835	uint32_t fp;	1243	uint32_t fp;
836	WANT (4);	1244	WANT (4);
837	memcpy (&fp, dec->cur, 4);	1245	memcpy (&fp, dec->cur, 4);
838	dec->cur += 4;	1246	dec->cur += 4;
…		…
841	fp = ecb_bswap32 (fp);	1249	fp = ecb_bswap32 (fp);
842		1250
843	return newSVnv (ecb_binary32_to_float (fp));	1251	return newSVnv (ecb_binary32_to_float (fp));
844	}	1252	}
845		1253
846	case 27:	1254	case MISC_FLOAT64:
847	{	1255	{
848	uint64_t fp;	1256	uint64_t fp;
849	WANT (8);	1257	WANT (8);
850	memcpy (&fp, dec->cur, 8);	1258	memcpy (&fp, dec->cur, 8);
851	dec->cur += 8;	1259	dec->cur += 8;
…		…
854	fp = ecb_bswap64 (fp);	1262	fp = ecb_bswap64 (fp);
855		1263
856	return newSVnv (ecb_binary64_to_double (fp));	1264	return newSVnv (ecb_binary64_to_double (fp));
857	}	1265	}
858		1266
859	// 0..19 unassigned	1267	// 0..19 unassigned simple
860	// 24 reserved + unassigned (reserved values are not encodable)	1268	// 24 reserved + unassigned simple (reserved values are not encodable)
		1269	// 28-30 unassigned misc
		1270	// 31 break code
861	default:	1271	default:
862	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1272	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
863	}	1273	}
864		1274
865	break;	1275	break;
866	}	1276	}
867	#if 0
868	switch (*dec->cur)
869	{
870	//case '"': ++dec->cur; return decode_str (dec);
871	case '[': ++dec->cur; return decode_av (dec);
872	case '{': ++dec->cur; return decode_hv (dec);
873
874	case '-':
875	case '0': case '1': case '2': case '3': case '4':
876	case '5': case '6': case '7': case '8': case '9':
877	//TODO return decode_num (dec);
878
879	case 't':
880	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
881	{
882	dec->cur += 4;
883	#if CBOR_SLOW
884	cbor_true = get_bool ("CBOR::XS::true");
885	#endif
886	return newSVsv (cbor_true);
887	}
888	else
889	ERR ("'true' expected");
890
891	break;
892
893	case 'f':
894	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
895	{
896	dec->cur += 5;
897	#if CBOR_SLOW
898	cbor_false = get_bool ("CBOR::XS::false");
899	#endif
900	return newSVsv (cbor_false);
901	}
902	else
903	ERR ("'false' expected");
904
905	break;
906
907	case 'n':
908	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
909	{
910	dec->cur += 4;
911	return newSVsv (&PL_sv_undef);
912	}
913	else
914	ERR ("'null' expected");
915
916	break;
917
918	default:
919	ERR ("malformed CBOR string, neither array, object, number, string or atom");
920	break;
921	}
922	#endif
923		1277
924	fail:	1278	fail:
925	return &PL_sv_undef;	1279	return &PL_sv_undef;
926	}	1280	}
927		1281
928	static SV *	1282	static SV *
929	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1283	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
930	{	1284	{
931	dec_t dec;	1285	dec_t dec = { 0 };
932	SV *sv;	1286	SV *sv;
		1287	STRLEN len;
		1288	char *data = SvPVbyte (string, len);
933		1289
934	/* work around bugs in 5.10 where manipulating magic values
935	* makes perl ignore the magic in subsequent accesses.
936	* also make a copy of non-PV values, to get them into a clean
937	* state (SvPV should do that, but it's buggy, see below).
938	*/
939	/*SvGETMAGIC (string);*/
940	if (SvMAGICAL (string) || !SvPOK (string))
941	string = sv_2mortal (newSVsv (string));
942
943	SvUPGRADE (string, SVt_PV);
944
945	/* work around a bug in perl 5.10, which causes SvCUR to fail an
946	* assertion with -DDEBUGGING, although SvCUR is documented to
947	* return the xpv_cur field which certainly exists after upgrading.
948	* according to nicholas clark, calling SvPOK fixes this.
949	* But it doesn't fix it, so try another workaround, call SvPV_nolen
950	* and hope for the best.
951	* Damnit, SvPV_nolen still trips over yet another assertion. This
952	* assertion business is seriously broken, try yet another workaround
953	* for the broken -DDEBUGGING.
954	*/
955	{
956	#ifdef DEBUGGING
957	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
958	#else
959	STRLEN offset = SvCUR (string);
960	#endif
961
962	if (offset > cbor->max_size && cbor->max_size)	1290	if (len > cbor->max_size && cbor->max_size)
963	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1291	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
964	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1292	(unsigned long)len, (unsigned long)cbor->max_size);
965	}
966
967	sv_utf8_downgrade (string, 0);
968		1293
969	dec.cbor = *cbor;	1294	dec.cbor = *cbor;
970	dec.cur = (U8 *)SvPVX (string);	1295	dec.cur = (U8 *)data;
971	dec.end = (U8 *)SvEND (string);	1296	dec.end = (U8 *)data + len;
972	dec.err = 0;
973	dec.depth = 0;
974
975	if (dec.cbor.cb_object || dec.cbor.cb_sk_object)
976	;//TODO dec.cbor.flags |= F_HOOK;
977		1297
978	sv = decode_sv (&dec);	1298	sv = decode_sv (&dec);
979		1299
980	if (offset_return)	1300	if (offset_return)
981	*offset_return = dec.cur;	1301	*offset_return = dec.cur;
…		…
984	if (dec.cur != dec.end && !dec.err)	1304	if (dec.cur != dec.end && !dec.err)
985	dec.err = "garbage after CBOR object";	1305	dec.err = "garbage after CBOR object";
986		1306
987	if (dec.err)	1307	if (dec.err)
988	{	1308	{
		1309	if (dec.shareable)
		1310	{
		1311	// need to break cyclic links, which would all be in shareable
		1312	int i;
		1313	SV **svp;
		1314
		1315	for (i = av_len (dec.shareable) + 1; i--; )
		1316	if ((svp = av_fetch (dec.shareable, i, 0)))
		1317	sv_setsv (*svp, &PL_sv_undef);
		1318	}
		1319
989	SvREFCNT_dec (sv);	1320	SvREFCNT_dec_NN (sv);
		1321
		1322	if (dec.err_sv)
		1323	sv_2mortal (dec.err_sv);
		1324
990	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1325	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
991	}	1326	}
992		1327
993	sv = sv_2mortal (sv);	1328	sv = sv_2mortal (sv);
994		1329
995	return sv;	1330	return sv;
996	}	1331	}
997		1332
		1333	/////////////////////////////////////////////////////////////////////////////
		1334	// incremental parser
		1335
		1336	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1337
		1338	// returns 0 for notyet, 1 for success or error
		1339	static int
		1340	incr_parse (CBOR *self, SV *cborstr)
		1341	{
		1342	STRLEN cur;
		1343	SvPV (cborstr, cur);
		1344
		1345	while (ecb_expect_true (self->incr_need <= cur))
		1346	{
		1347	// table of integer count bytes
		1348	static I8 incr_len[MINOR_MASK + 1] = {
		1349	0, 0, 0, 0, 0, 0, 0, 0,
		1350	0, 0, 0, 0, 0, 0, 0, 0,
		1351	0, 0, 0, 0, 0, 0, 0, 0,
		1352	1, 2, 4, 8,-1,-1,-1,-2
		1353	};
		1354
		1355	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1356	U8 m = *p & MINOR_MASK;
		1357	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1358	I8 ilen = incr_len[m];
		1359
		1360	self->incr_need = self->incr_pos + 1;
		1361
		1362	if (ecb_expect_false (ilen < 0))
		1363	{
		1364	if (m != MINOR_INDEF)
		1365	return 1; // error
		1366
		1367	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1368	{
		1369	if (count >= 0)
		1370	return 1; // error
		1371
		1372	count = 1;
		1373	}
		1374	else
		1375	{
		1376	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1377	count = -1;
		1378	}
		1379	}
		1380	else
		1381	{
		1382	self->incr_need += ilen;
		1383	if (ecb_expect_false (self->incr_need > cur))
		1384	return 0;
		1385
		1386	int major = *p >> MAJOR_SHIFT;
		1387
		1388	switch (major)
		1389	{
		1390	case MAJOR_TAG >> MAJOR_SHIFT:
		1391	++count; // tags merely prefix another value
		1392	break;
		1393
		1394	case MAJOR_BYTES >> MAJOR_SHIFT:
		1395	case MAJOR_TEXT >> MAJOR_SHIFT:
		1396	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1397	case MAJOR_MAP >> MAJOR_SHIFT:
		1398	{
		1399	UV len;
		1400
		1401	if (ecb_expect_false (ilen))
		1402	{
		1403	len = 0;
		1404
		1405	do {
		1406	len = (len << 8) | *++p;
		1407	} while (--ilen);
		1408	}
		1409	else
		1410	len = m;
		1411
		1412	switch (major)
		1413	{
		1414	case MAJOR_BYTES >> MAJOR_SHIFT:
		1415	case MAJOR_TEXT >> MAJOR_SHIFT:
		1416	self->incr_need += len;
		1417	if (ecb_expect_false (self->incr_need > cur))
		1418	return 0;
		1419
		1420	break;
		1421
		1422	case MAJOR_MAP >> MAJOR_SHIFT:
		1423	len <<= 1;
		1424	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1425	if (len)
		1426	{
		1427	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1428	count = len + 1;
		1429	}
		1430	break;
		1431	}
		1432	}
		1433	}
		1434	}
		1435
		1436	self->incr_pos = self->incr_need;
		1437
		1438	if (count > 0)
		1439	{
		1440	while (!--count)
		1441	{
		1442	if (!AvFILLp (self->incr_count))
		1443	return 1; // done
		1444
		1445	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1446	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1447	}
		1448
		1449	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1450	}
		1451	}
		1452
		1453	return 0;
		1454	}
		1455
		1456
998	/////////////////////////////////////////////////////////////////////////////	1457	/////////////////////////////////////////////////////////////////////////////
999	// XS interface functions	1458	// XS interface functions
1000		1459
1001	MODULE = CBOR::XS PACKAGE = CBOR::XS	1460	MODULE = CBOR::XS PACKAGE = CBOR::XS
1002		1461
1003	BOOT:	1462	BOOT:
1004	{	1463	{
1005	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1464	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
1006	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);	1465	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
1007		1466
1008	cbor_true = get_bool ("CBOR::XS::true");	1467	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1009	cbor_false = get_bool ("CBOR::XS::false");	1468	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1469
		1470	types_true = get_bool ("Types::Serialiser::true" );
		1471	types_false = get_bool ("Types::Serialiser::false");
		1472	types_error = get_bool ("Types::Serialiser::error");
		1473
		1474	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1475
		1476	sv_cbor = newSVpv ("CBOR", 0);
		1477	SvREADONLY_on (sv_cbor);
		1478
		1479	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
1010	}	1480	}
1011		1481
1012	PROTOTYPES: DISABLE	1482	PROTOTYPES: DISABLE
1013		1483
1014	void CLONE (...)	1484	void CLONE (...)
1015	CODE:	1485	CODE:
1016	cbor_stash = 0;	1486	cbor_stash = 0;
		1487	cbor_tagged_stash = 0;
		1488	types_error_stash = 0;
1017	cbor_boolean_stash = 0;	1489	types_boolean_stash = 0;
1018		1490
1019	void new (char *klass)	1491	void new (char *klass)
1020	PPCODE:	1492	PPCODE:
1021	{	1493	{
1022	SV *pv = NEWSV (0, sizeof (CBOR));	1494	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
1030		1502
1031	void shrink (CBOR *self, int enable = 1)	1503	void shrink (CBOR *self, int enable = 1)
1032	ALIAS:	1504	ALIAS:
1033	shrink = F_SHRINK	1505	shrink = F_SHRINK
1034	allow_unknown = F_ALLOW_UNKNOWN	1506	allow_unknown = F_ALLOW_UNKNOWN
		1507	allow_sharing = F_ALLOW_SHARING
		1508	allow_cycles = F_ALLOW_CYCLES
		1509	forbid_objects = F_FORBID_OBJECTS
		1510	pack_strings = F_PACK_STRINGS
		1511	text_keys = F_TEXT_KEYS
		1512	text_strings = F_TEXT_STRINGS
		1513	validate_utf8 = F_VALIDATE_UTF8
1035	PPCODE:	1514	PPCODE:
1036	{	1515	{
1037	if (enable)	1516	if (enable)
1038	self->flags |= ix;	1517	self->flags |= ix;
1039	else	1518	else
…		…
1044		1523
1045	void get_shrink (CBOR *self)	1524	void get_shrink (CBOR *self)
1046	ALIAS:	1525	ALIAS:
1047	get_shrink = F_SHRINK	1526	get_shrink = F_SHRINK
1048	get_allow_unknown = F_ALLOW_UNKNOWN	1527	get_allow_unknown = F_ALLOW_UNKNOWN
		1528	get_allow_sharing = F_ALLOW_SHARING
		1529	get_allow_cycles = F_ALLOW_CYCLES
		1530	get_forbid_objects = F_FORBID_OBJECTS
		1531	get_pack_strings = F_PACK_STRINGS
		1532	get_text_keys = F_TEXT_KEYS
		1533	get_text_strings = F_TEXT_STRINGS
		1534	get_validate_utf8 = F_VALIDATE_UTF8
1049	PPCODE:	1535	PPCODE:
1050	XPUSHs (boolSV (self->flags & ix));	1536	XPUSHs (boolSV (self->flags & ix));
1051		1537
1052	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1538	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1053	PPCODE:	1539	PPCODE:
…		…
1069	CODE:	1555	CODE:
1070	RETVAL = self->max_size;	1556	RETVAL = self->max_size;
1071	OUTPUT:	1557	OUTPUT:
1072	RETVAL	1558	RETVAL
1073		1559
1074	#if 0 //TODO	1560	void filter (CBOR *self, SV *filter = 0)
1075
1076	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
1077	PPCODE:	1561	PPCODE:
1078	{
1079	SvREFCNT_dec (self->cb_object);	1562	SvREFCNT_dec (self->filter);
1080	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1563	self->filter = filter ? newSVsv (filter) : filter;
1081
1082	XPUSHs (ST (0));	1564	XPUSHs (ST (0));
1083	}
1084		1565
1085	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1566	SV *get_filter (CBOR *self)
1086	PPCODE:	1567	CODE:
1087	{	1568	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1088	if (!self->cb_sk_object)	1569	OUTPUT:
1089	self->cb_sk_object = newHV ();	1570	RETVAL
1090
1091	if (SvOK (cb))
1092	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1093	else
1094	{
1095	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1096
1097	if (!HvKEYS (self->cb_sk_object))
1098	{
1099	SvREFCNT_dec (self->cb_sk_object);
1100	self->cb_sk_object = 0;
1101	}
1102	}
1103
1104	XPUSHs (ST (0));
1105	}
1106
1107	#endif
1108		1571
1109	void encode (CBOR *self, SV *scalar)	1572	void encode (CBOR *self, SV *scalar)
1110	PPCODE:	1573	PPCODE:
1111	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1574	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
1112	XPUSHs (scalar);	1575	XPUSHs (scalar);
…		…
1125	EXTEND (SP, 2);	1588	EXTEND (SP, 2);
1126	PUSHs (sv);	1589	PUSHs (sv);
1127	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1590	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1128	}	1591	}
1129		1592
		1593	void incr_parse (CBOR *self, SV *cborstr)
		1594	ALIAS:
		1595	incr_parse_multiple = 1
		1596	PPCODE:
		1597	{
		1598	if (SvUTF8 (cborstr))
		1599	sv_utf8_downgrade (cborstr, 0);
		1600
		1601	if (!self->incr_count)
		1602	{
		1603	self->incr_count = newAV ();
		1604	self->incr_pos = 0;
		1605	self->incr_need = 1;
		1606
		1607	av_push (self->incr_count, newSViv (1));
		1608	}
		1609
		1610	do
		1611	{
		1612	if (!incr_parse (self, cborstr))
		1613	{
		1614	if (self->incr_need > self->max_size && self->max_size)
		1615	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1616	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1617
		1618	break;
		1619	}
		1620
		1621	SV *sv;
		1622	char *offset;
		1623
		1624	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1625	XPUSHs (sv);
		1626
		1627	sv_chop (cborstr, offset);
		1628
		1629	av_clear (self->incr_count);
		1630	av_push (self->incr_count, newSViv (1));
		1631
		1632	self->incr_pos = 0;
		1633	self->incr_need = self->incr_pos + 1;
		1634	}
		1635	while (ix);
		1636	}
		1637
		1638	void incr_reset (CBOR *self)
		1639	CODE:
		1640	{
		1641	SvREFCNT_dec (self->incr_count);
		1642	self->incr_count = 0;
		1643	}
		1644
1130	void DESTROY (CBOR *self)	1645	void DESTROY (CBOR *self)
1131	CODE:	1646	PPCODE:
1132	SvREFCNT_dec (self->cb_sk_object);	1647	cbor_free (self);
1133	SvREFCNT_dec (self->cb_object);
1134		1648
1135	PROTOTYPES: ENABLE	1649	PROTOTYPES: ENABLE
1136		1650
1137	void encode_cbor (SV *scalar)	1651	void encode_cbor (SV *scalar)
		1652	ALIAS:
		1653	encode_cbor = 0
		1654	encode_cbor_sharing = F_ALLOW_SHARING
1138	PPCODE:	1655	PPCODE:
1139	{	1656	{
1140	CBOR cbor;	1657	CBOR cbor;
1141	cbor_init (&cbor);	1658	cbor_init (&cbor);
		1659	cbor.flags |= ix;
1142	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1660	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1143	XPUSHs (scalar);	1661	XPUSHs (scalar);
1144	}	1662	}
1145		1663
1146	void decode_cbor (SV *cborstr)	1664	void decode_cbor (SV *cborstr)

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