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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.17 by root, Tue Oct 29 22:04:52 2013 UTC vs.
Revision 1.69 by root, Mon Nov 30 20:38:25 2020 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
14	// compatibility with perl <5.18	16	// compatibility with perl <5.18
15	#ifndef HvNAMELEN_get	17	#ifndef HvNAMELEN_get
16	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))	18	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
…		…
19	# define HvNAMELEN(hv) HvNAMELEN_get (hv)	21	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
20	#endif	22	#endif
21	#ifndef HvNAMEUTF8	23	#ifndef HvNAMEUTF8
22	# define HvNAMEUTF8(hv) 0	24	# define HvNAMEUTF8(hv) 0
23	#endif	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	};
24		69
25	// known tags	70	// known tags
26	enum cbor_tag	71	enum cbor_tag
27	{	72	{
28	// inofficial extensions (pending iana registration)	73	// extensions
29	CBOR_TAG_PERL_OBJECT = 256,	74	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
30	CBOR_TAG_GENERIC_OBJECT = 257,	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
31		81
32	// rfc7049	82	// rfc7049
33	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	83	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
34	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	84	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
35	CBOR_TAG_POS_BIGNUM = 2, // byte string	85	CBOR_TAG_POS_BIGNUM = 2, // byte string
36	CBOR_TAG_NEG_BIGNUM = 3, // byte string	86	CBOR_TAG_NEG_BIGNUM = 3, // byte string
37	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	87	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
38	CBOR_TAG_BIGFLOAT = 5, // array	88	CBOR_TAG_BIGFLOAT = 5, // array
39		89
40	CBOR_TAG_CONV_B64U = 21, // base64url, any	90	CBOR_TAG_CONV_B64U = 21, // base64url, any
41	CBOR_TAG_CONV_B64 = 22, // base64, any	91	CBOR_TAG_CONV_B64 = 22, // base64, any
42	CBOR_TAG_CONV_HEX = 23, // base16, any	92	CBOR_TAG_CONV_HEX = 23, // base16, any
43	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	93	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
44		94
45	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	95	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
46	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	96	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
47	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	97	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
48	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	98	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
49	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	99	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
50		100
51	CBOR_TAG_MAGIC = 55799 // self-describe cbor	101	CBOR_TAG_MAGIC = 55799, // self-describe cbor
52	};	102	};
53		103
		104	// known forced types, also hardcoded in CBOR.pm
		105	enum
		106	{
		107	AS_CBOR = 0,
		108	AS_INT = 1,
		109	AS_BYTES = 2,
		110	AS_TEXT = 3,
		111	AS_FLOAT16 = 4,
		112	AS_FLOAT32 = 5,
		113	AS_FLOAT64 = 6,
		114	// possibly future enhancements: (generic) float, (generic) string
		115	};
		116
54	#define F_SHRINK 0x00000200UL	117	#define F_SHRINK 0x00000001UL
55	#define F_ALLOW_UNKNOWN 0x00002000UL	118	#define F_ALLOW_UNKNOWN 0x00000002UL
		119	#define F_ALLOW_SHARING 0x00000004UL
		120	#define F_ALLOW_CYCLES 0x00000008UL
		121	#define F_FORBID_OBJECTS 0x00000010UL
		122	#define F_PACK_STRINGS 0x00000020UL
		123	#define F_TEXT_KEYS 0x00000040UL
		124	#define F_TEXT_STRINGS 0x00000080UL
		125	#define F_VALIDATE_UTF8 0x00000100UL
56		126
57	#define INIT_SIZE 32 // initial scalar size to be allocated	127	#define INIT_SIZE 32 // initial scalar size to be allocated
58		128
59	#define SB do {	129	#define SB do {
60	#define SE } while (0)	130	#define SE } while (0)
…		…
72	# define CBOR_SLOW 0	142	# define CBOR_SLOW 0
73	# define CBOR_STASH cbor_stash	143	# define CBOR_STASH cbor_stash
74	#endif	144	#endif
75		145
76	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::	146	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;	147	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
78		148
79	typedef struct {	149	typedef struct {
80	U32 flags;	150	U32 flags;
81	U32 max_depth;	151	U32 max_depth;
82	STRLEN max_size;	152	STRLEN max_size;
		153	SV *filter;
		154
		155	// for the incremental parser
		156	STRLEN incr_pos; // the current offset into the text
		157	STRLEN incr_need; // minimum bytes needed to decode
		158	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
83	} CBOR;	159	} CBOR;
84		160
85	ecb_inline void	161	ecb_inline void
86	cbor_init (CBOR *cbor)	162	cbor_init (CBOR *cbor)
87	{	163	{
88	Zero (cbor, 1, CBOR);	164	Zero (cbor, 1, CBOR);
89	cbor->max_depth = 512;	165	cbor->max_depth = 512;
		166	}
		167
		168	ecb_inline void
		169	cbor_free (CBOR *cbor)
		170	{
		171	SvREFCNT_dec (cbor->filter);
		172	SvREFCNT_dec (cbor->incr_count);
90	}	173	}
91		174
92	/////////////////////////////////////////////////////////////////////////////	175	/////////////////////////////////////////////////////////////////////////////
93	// utility functions	176	// utility functions
94		177
…		…
116	SvPV_renew (sv, SvCUR (sv) + 1);	199	SvPV_renew (sv, SvCUR (sv) + 1);
117	#endif	200	#endif
118	}	201	}
119	}	202	}
120		203
121	/////////////////////////////////////////////////////////////////////////////	204	// minimum length of a string to be registered for stringref
122	// fp hell	205	ecb_inline int
123		206	minimum_string_length (UV idx)
124	//TODO	207	{
		208	return idx <= 23 ? 3
		209	: idx <= 0xffU ? 4
		210	: idx <= 0xffffU ? 5
		211	: idx <= 0xffffffffU ? 7
		212	: 11;
		213	}
125		214
126	/////////////////////////////////////////////////////////////////////////////	215	/////////////////////////////////////////////////////////////////////////////
127	// encoder	216	// encoder
128		217
129	// structure used for encoding CBOR	218	// structure used for encoding CBOR
…		…
132	char *cur; // SvPVX (sv) + current output position	221	char *cur; // SvPVX (sv) + current output position
133	char *end; // SvEND (sv)	222	char *end; // SvEND (sv)
134	SV *sv; // result scalar	223	SV *sv; // result scalar
135	CBOR cbor;	224	CBOR cbor;
136	U32 depth; // recursion level	225	U32 depth; // recursion level
		226	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		227	UV stringref_idx;
		228	HV *shareable; // ptr => index, or 0
		229	UV shareable_idx;
137	} enc_t;	230	} enc_t;
138		231
139	ecb_inline void	232	ecb_inline void
140	need (enc_t *enc, STRLEN len)	233	need (enc_t *enc, STRLEN len)
141	{	234	{
142	if (ecb_expect_false (enc->cur + len >= enc->end))	235	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
143	{	236	{
144	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	237	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
145	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	238	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
146	enc->cur = SvPVX (enc->sv) + cur;	239	enc->cur = SvPVX (enc->sv) + cur;
147	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	240	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
…		…
153	{	246	{
154	need (enc, 1);	247	need (enc, 1);
155	*enc->cur++ = ch;	248	*enc->cur++ = ch;
156	}	249	}
157		250
		251	// used for tags, intregers, element counts and so on
158	static void	252	static void
159	encode_uint (enc_t *enc, int major, UV len)	253	encode_uint (enc_t *enc, int major, UV len)
160	{	254	{
161	need (enc, 9);	255	need (enc, 9);
162		256
163	if (len < 24)	257	if (ecb_expect_true (len < LENGTH_EXT1))
164	*enc->cur++ = major | len;	258	*enc->cur++ = major | len;
165	else if (len <= 0xff)	259	else if (ecb_expect_true (len <= 0xffU))
166	{	260	{
167	*enc->cur++ = major | 24;	261	*enc->cur++ = major | LENGTH_EXT1;
168	*enc->cur++ = len;	262	*enc->cur++ = len;
169	}	263	}
170	else if (len <= 0xffff)	264	else if (len <= 0xffffU)
171	{	265	{
172	*enc->cur++ = major | 25;	266	*enc->cur++ = major | LENGTH_EXT2;
173	*enc->cur++ = len >> 8;	267	*enc->cur++ = len >> 8;
174	*enc->cur++ = len;	268	*enc->cur++ = len;
175	}	269	}
176	else if (len <= 0xffffffff)	270	else if (len <= 0xffffffffU)
177	{	271	{
178	*enc->cur++ = major | 26;	272	*enc->cur++ = major | LENGTH_EXT4;
179	*enc->cur++ = len >> 24;	273	*enc->cur++ = len >> 24;
180	*enc->cur++ = len >> 16;	274	*enc->cur++ = len >> 16;
181	*enc->cur++ = len >> 8;	275	*enc->cur++ = len >> 8;
182	*enc->cur++ = len;	276	*enc->cur++ = len;
183	}	277	}
184	else	278	else
185	{	279	{
186	*enc->cur++ = major | 27;	280	*enc->cur++ = major | LENGTH_EXT8;
187	*enc->cur++ = len >> 56;	281	*enc->cur++ = len >> 56;
188	*enc->cur++ = len >> 48;	282	*enc->cur++ = len >> 48;
189	*enc->cur++ = len >> 40;	283	*enc->cur++ = len >> 40;
190	*enc->cur++ = len >> 32;	284	*enc->cur++ = len >> 32;
191	*enc->cur++ = len >> 24;	285	*enc->cur++ = len >> 24;
…		…
193	*enc->cur++ = len >> 8;	287	*enc->cur++ = len >> 8;
194	*enc->cur++ = len;	288	*enc->cur++ = len;
195	}	289	}
196	}	290	}
197		291
198	static void	292	// encodes a perl value into a CBOR integer
		293	ecb_inline void
		294	encode_int (enc_t *enc, SV *sv)
		295	{
		296	if (SvIsUV (sv))
		297	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
		298	else if (SvIVX (sv) >= 0)
		299	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
		300	else
		301	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
		302	}
		303
		304	ecb_inline void
		305	encode_tag (enc_t *enc, UV tag)
		306	{
		307	encode_uint (enc, MAJOR_TAG, tag);
		308	}
		309
		310	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		311	ecb_noinline static void
199	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	312	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
200	{	313	{
201	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	314	STRLEN ulen = len;
		315	U8 *p, *pend = (U8 *)str + len;
		316
		317	for (p = (U8 *)str; p < pend; ++p)
		318	ulen += *p >> 7; // count set high bits
		319
		320	encode_uint (enc, MAJOR_TEXT, ulen);
		321
		322	need (enc, ulen);
		323	for (p = (U8 *)str; p < pend; ++p)
		324	if (*p < 0x80)
		325	*enc->cur++ = *p;
		326	else
		327	{
		328	*enc->cur++ = 0xc0 + (*p >> 6);
		329	*enc->cur++ = 0x80 + (*p & 63);
		330	}
		331	}
		332
		333	ecb_inline void
		334	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		335	{
		336	if (ecb_expect_false (upgrade_utf8))
		337	if (!utf8)
		338	{
		339	encode_str_utf8 (enc, utf8, str, len);
		340	return;
		341	}
		342
		343	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
202	need (enc, len);	344	need (enc, len);
203	memcpy (enc->cur, str, len);	345	memcpy (enc->cur, str, len);
204	enc->cur += len;	346	enc->cur += len;
205	}	347	}
206		348
		349	ecb_inline void
		350	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		351	{
		352	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		353	{
		354	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		355
		356	if (SvOK (*svp))
		357	{
		358	// already registered, use stringref
		359	encode_tag (enc, CBOR_TAG_STRINGREF);
		360	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		361	return;
		362	}
		363	else if (len >= minimum_string_length (enc->stringref_idx))
		364	{
		365	// register only
		366	sv_setuv (*svp, enc->stringref_idx);
		367	++enc->stringref_idx;
		368	}
		369	}
		370
		371	encode_str (enc, upgrade_utf8, utf8, str, len);
		372	}
		373
		374	ecb_inline void
		375	encode_float16 (enc_t *enc, NV nv)
		376	{
		377	need (enc, 1+2);
		378
		379	*enc->cur++ = MAJOR_MISC | MISC_FLOAT16;
		380
		381	uint16_t fp = ecb_float_to_binary16 (nv);
		382
		383	if (!ecb_big_endian ())
		384	fp = ecb_bswap16 (fp);
		385
		386	memcpy (enc->cur, &fp, 2);
		387	enc->cur += 2;
		388	}
		389
		390	ecb_inline void
		391	encode_float32 (enc_t *enc, NV nv)
		392	{
		393	need (enc, 1+4);
		394
		395	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
		396
		397	uint32_t fp = ecb_float_to_binary32 (nv);
		398
		399	if (!ecb_big_endian ())
		400	fp = ecb_bswap32 (fp);
		401
		402	memcpy (enc->cur, &fp, 4);
		403	enc->cur += 4;
		404	}
		405
		406	ecb_inline void
		407	encode_float64 (enc_t *enc, NV nv)
		408	{
		409	need (enc, 1+8);
		410
		411	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
		412
		413	uint64_t fp = ecb_double_to_binary64 (nv);
		414
		415	if (!ecb_big_endian ())
		416	fp = ecb_bswap64 (fp);
		417
		418	memcpy (enc->cur, &fp, 8);
		419	enc->cur += 8;
		420	}
		421
		422	ecb_inline void
		423	encode_bool (enc_t *enc, int istrue)
		424	{
		425	encode_ch (enc, istrue ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		426	}
		427
		428	ecb_inline void
		429	encode_forced (enc_t *enc, UV type, SV *sv)
		430	{
		431	switch (type)
		432	{
		433	case AS_CBOR:
		434	{
		435	STRLEN len;
		436	char *str = SvPVbyte (sv, len);
		437
		438	need (enc, len);
		439	memcpy (enc->cur, str, len);
		440	enc->cur += len;
		441	}
		442	break;
		443
		444	case AS_BYTES:
		445	{
		446	STRLEN len;
		447	char *str = SvPVbyte (sv, len);
		448	encode_strref (enc, 0, 0, str, len);
		449	}
		450	break;
		451
		452	case AS_TEXT:
		453	{
		454	STRLEN len;
		455	char *str = SvPVutf8 (sv, len);
		456	encode_strref (enc, 1, 1, str, len);
		457	}
		458	break;
		459
		460	case AS_INT: encode_int (enc, sv); break;
		461
		462	case AS_FLOAT16: encode_float16 (enc, SvNV (sv)); break;
		463	case AS_FLOAT32: encode_float32 (enc, SvNV (sv)); break;
		464	case AS_FLOAT64: encode_float64 (enc, SvNV (sv)); break;
		465
		466	default:
		467	croak ("encountered malformed CBOR::XS::Tagged object");
		468	}
		469	}
		470
207	static void encode_sv (enc_t *enc, SV *sv);	471	static void encode_sv (enc_t *enc, SV *sv);
208		472
209	static void	473	static void
210	encode_av (enc_t *enc, AV *av)	474	encode_av (enc_t *enc, AV *av)
211	{	475	{
…		…
214	if (enc->depth >= enc->cbor.max_depth)	478	if (enc->depth >= enc->cbor.max_depth)
215	croak (ERR_NESTING_EXCEEDED);	479	croak (ERR_NESTING_EXCEEDED);
216		480
217	++enc->depth;	481	++enc->depth;
218		482
219	encode_uint (enc, 0x80, len + 1);	483	encode_uint (enc, MAJOR_ARRAY, len + 1);
220		484
		485	if (ecb_expect_false (SvMAGICAL (av)))
221	for (i = 0; i <= len; ++i)	486	for (i = 0; i <= len; ++i)
222	{	487	{
223	SV **svp = av_fetch (av, i, 0);	488	SV **svp = av_fetch (av, i, 0);
224	encode_sv (enc, svp ? *svp : &PL_sv_undef);	489	encode_sv (enc, svp ? *svp : &PL_sv_undef);
225	}	490	}
		491	else
		492	for (i = 0; i <= len; ++i)
		493	{
		494	SV *sv = AvARRAY (av)[i];
		495	encode_sv (enc, sv ? sv : &PL_sv_undef);
		496	}
226		497
227	--enc->depth;	498	--enc->depth;
228	}	499	}
229		500
230	static void	501	static void
…		…
238	++enc->depth;	509	++enc->depth;
239		510
240	int pairs = hv_iterinit (hv);	511	int pairs = hv_iterinit (hv);
241	int mg = SvMAGICAL (hv);	512	int mg = SvMAGICAL (hv);
242		513
243	if (mg)	514	if (ecb_expect_false (mg))
244	encode_ch (enc, 0xa0 | 31);	515	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
245	else	516	else
246	encode_uint (enc, 0xa0, pairs);	517	encode_uint (enc, MAJOR_MAP, pairs);
247		518
248	while ((he = hv_iternext (hv)))	519	while ((he = hv_iternext (hv)))
249	{	520	{
250	if (HeKLEN (he) == HEf_SVKEY)	521	if (HeKLEN (he) == HEf_SVKEY)
251	encode_sv (enc, HeSVKEY (he));	522	encode_sv (enc, HeSVKEY (he));
252	else	523	else
253	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	524	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
254		525
255	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	526	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
256	}	527	}
257		528
258	if (mg)	529	if (ecb_expect_false (mg))
259	encode_ch (enc, 0xe0 | 31);	530	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
260		531
261	--enc->depth;	532	--enc->depth;
262	}	533	}
263		534
264	// encode objects, arrays and special \0=false and \1=true values.	535	// encode objects, arrays and special \0=false and \1=true values.
265	static void	536	static void
266	encode_rv (enc_t *enc, SV *sv)	537	encode_rv (enc_t *enc, SV *sv)
267	{	538	{
268	svtype svt;
269
270	SvGETMAGIC (sv);	539	SvGETMAGIC (sv);
		540
271	svt = SvTYPE (sv);	541	svtype svt = SvTYPE (sv);
272		542
273	if (ecb_expect_false (SvOBJECT (sv)))	543	if (ecb_expect_false (SvOBJECT (sv)))
274	{	544	{
275	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash	545	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
276	? types_boolean_stash	546	? types_boolean_stash
…		…
281	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	551	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
282	? cbor_tagged_stash	552	? cbor_tagged_stash
283	: gv_stashpv ("CBOR::XS::Tagged" , 1);	553	: gv_stashpv ("CBOR::XS::Tagged" , 1);
284		554
285	HV *stash = SvSTASH (sv);	555	HV *stash = SvSTASH (sv);
286	GV *method;
287		556
288	if (stash == boolean_stash)	557	if (stash == boolean_stash)
289	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	558	{
		559	encode_bool (enc, SvIV (sv));
		560	return;
		561	}
290	else if (stash == error_stash)	562	else if (stash == error_stash)
291	encode_ch (enc, 0xe0 | 23);	563	{
		564	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		565	return;
		566	}
292	else if (stash == tagged_stash)	567	else if (stash == tagged_stash)
293	{	568	{
294	if (svt != SVt_PVAV)	569	if (svt != SVt_PVAV)
295	croak ("encountered CBOR::XS::Tagged object that isn't an array");	570	croak ("encountered CBOR::XS::Tagged object that isn't an array");
296		571
		572	switch (av_len ((AV *)sv))
		573	{
		574	case 2-1:
		575	// actually a tagged value
297	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	576	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
298	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));	577	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		578	break;
		579
		580	case 3-1:
		581	// a forced type [value, type, undef]
		582	encode_forced (enc, SvUV (*av_fetch ((AV *)sv, 1, 1)), *av_fetch ((AV *)sv, 0, 1));
		583	break;
		584
		585	default:
		586	croak ("encountered malformed CBOR::XS::Tagged object");
		587	}
		588
		589	return;
		590	}
		591	}
		592
		593	if (ecb_expect_false (SvREFCNT (sv) > 1)
		594	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		595	{
		596	if (ecb_expect_false (!enc->shareable))
		597	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		598
		599	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		600
		601	if (SvOK (*svp))
299	}	602	{
		603	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		604	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		605	return;
		606	}
		607	else
		608	{
		609	sv_setuv (*svp, enc->shareable_idx);
		610	++enc->shareable_idx;
		611	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		612	}
		613	}
		614
		615	if (ecb_expect_false (SvOBJECT (sv)))
		616	{
		617	HV *stash = SvSTASH (sv);
		618	GV *method;
		619
		620	if (enc->cbor.flags & F_FORBID_OBJECTS)
		621	croak ("encountered object '%s', but forbid_objects is enabled",
		622	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
300	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))	623	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
301	{	624	{
302	dSP;	625	dSP;
303		626
304	ENTER; SAVETMPS; PUSHMARK (SP);	627	ENTER; SAVETMPS;
		628	PUSHMARK (SP);
305	// we re-bless the reference to get overload and other niceties right	629	// we re-bless the reference to get overload and other niceties right
306	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	630	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
307		631
308	PUTBACK;	632	PUTBACK;
309	// G_SCALAR ensures that return value is 1	633	// G_SCALAR ensures that return value is 1
…		…
322	}	646	}
323	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)	647	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
324	{	648	{
325	dSP;	649	dSP;
326		650
327	ENTER; SAVETMPS; PUSHMARK (SP);	651	ENTER; SAVETMPS;
		652	PUSHMARK (SP);
328	EXTEND (SP, 2);	653	EXTEND (SP, 2);
329	// we re-bless the reference to get overload and other niceties right	654	// we re-bless the reference to get overload and other niceties right
330	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	655	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
331	PUSHs (sv_cbor);	656	PUSHs (sv_cbor);
332		657
…		…
336		661
337	// catch this surprisingly common error	662	// catch this surprisingly common error
338	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)	663	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));	664	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
340		665
341	encode_uint (enc, 0xc0, CBOR_TAG_PERL_OBJECT);	666	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
342	encode_uint (enc, 0x80, count + 1);	667	encode_uint (enc, MAJOR_ARRAY, count + 1);
343	encode_str (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));	668	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
344		669
345	while (count)	670	{
		671	int i;
		672
		673	for (i = 0; i < count; ++i)
346	encode_sv (enc, SP[1 - count--]);	674	encode_sv (enc, SP[i + 1 - count]);
		675
		676	SP -= count;
		677	}
347		678
348	PUTBACK;	679	PUTBACK;
349		680
350	FREETMPS; LEAVE;	681	FREETMPS; LEAVE;
351	}	682	}
…		…
355	}	686	}
356	else if (svt == SVt_PVHV)	687	else if (svt == SVt_PVHV)
357	encode_hv (enc, (HV *)sv);	688	encode_hv (enc, (HV *)sv);
358	else if (svt == SVt_PVAV)	689	else if (svt == SVt_PVAV)
359	encode_av (enc, (AV *)sv);	690	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	691	else
378	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	692	{
379	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	693	encode_tag (enc, CBOR_TAG_INDIRECTION);
		694	encode_sv (enc, sv);
		695	}
380	}	696	}
381		697
382	static void	698	static void
383	encode_nv (enc_t *enc, SV *sv)	699	encode_nv (enc_t *enc, SV *sv)
384	{	700	{
385	double nv = SvNVX (sv);	701	double nv = SvNVX (sv);
386		702
387	need (enc, 9);	703	need (enc, 9);
388		704
389	if (ecb_expect_false (nv == (U32)nv))	705	if (ecb_expect_false (nv == (NV)(U32)nv))
390	encode_uint (enc, 0x00, (U32)nv);	706	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
391	//TODO: maybe I32?	707	//TODO: maybe I32?
392	else if (ecb_expect_false (nv == (float)nv))	708	else if (ecb_expect_false (nv == (float)nv))
393	{	709	encode_float32 (enc, nv);
394	uint32_t fp = ecb_float_to_binary32 (nv);
395
396	*enc->cur++ = 0xe0 | 26;
397
398	if (!ecb_big_endian ())
399	fp = ecb_bswap32 (fp);
400
401	memcpy (enc->cur, &fp, 4);
402	enc->cur += 4;
403	}
404	else	710	else
405	{	711	encode_float64 (enc, nv);
406	uint64_t fp = ecb_double_to_binary64 (nv);
407
408	*enc->cur++ = 0xe0 | 27;
409
410	if (!ecb_big_endian ())
411	fp = ecb_bswap64 (fp);
412
413	memcpy (enc->cur, &fp, 8);
414	enc->cur += 8;
415	}
416	}	712	}
417		713
418	static void	714	static void
419	encode_sv (enc_t *enc, SV *sv)	715	encode_sv (enc_t *enc, SV *sv)
420	{	716	{
…		…
422		718
423	if (SvPOKp (sv))	719	if (SvPOKp (sv))
424	{	720	{
425	STRLEN len;	721	STRLEN len;
426	char *str = SvPV (sv, len);	722	char *str = SvPV (sv, len);
427	encode_str (enc, SvUTF8 (sv), str, len);	723	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
428	}	724	}
429	else if (SvNOKp (sv))	725	else if (SvNOKp (sv))
430	encode_nv (enc, sv);	726	encode_nv (enc, sv);
431	else if (SvIOKp (sv))	727	else if (SvIOKp (sv))
432	{	728	encode_int (enc, sv);
433	if (SvIsUV (sv))
434	encode_uint (enc, 0x00, SvUVX (sv));
435	else if (SvIVX (sv) >= 0)
436	encode_uint (enc, 0x00, SvIVX (sv));
437	else
438	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
439	}
440	else if (SvROK (sv))	729	else if (SvROK (sv))
441	encode_rv (enc, SvRV (sv));	730	encode_rv (enc, SvRV (sv));
442	else if (!SvOK (sv))	731	else if (!SvOK (sv))
443	encode_ch (enc, 0xe0 | 22);	732	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
444	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	733	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
445	encode_ch (enc, 0xe0 | 23);	734	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
446	else	735	else
447	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	736	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
448	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	737	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
449	}	738	}
450		739
451	static SV *	740	static SV *
452	encode_cbor (SV *scalar, CBOR *cbor)	741	encode_cbor (SV *scalar, CBOR *cbor)
453	{	742	{
454	enc_t enc;	743	enc_t enc = { 0 };
455		744
456	enc.cbor = *cbor;	745	enc.cbor = *cbor;
457	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	746	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
458	enc.cur = SvPVX (enc.sv);	747	enc.cur = SvPVX (enc.sv);
459	enc.end = SvEND (enc.sv);	748	enc.end = SvEND (enc.sv);
460	enc.depth = 0;
461		749
462	SvPOK_only (enc.sv);	750	SvPOK_only (enc.sv);
		751
		752	if (cbor->flags & F_PACK_STRINGS)
		753	{
		754	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		755	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		756	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		757	}
		758
463	encode_sv (&enc, scalar);	759	encode_sv (&enc, scalar);
464		760
465	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	761	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
466	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	762	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
467		763
…		…
481	U8 *end; // end of input string	777	U8 *end; // end of input string
482	const char *err; // parse error, if != 0	778	const char *err; // parse error, if != 0
483	CBOR cbor;	779	CBOR cbor;
484	U32 depth; // recursion depth	780	U32 depth; // recursion depth
485	U32 maxdepth; // recursion depth limit	781	U32 maxdepth; // recursion depth limit
		782	AV *shareable;
		783	AV *stringref;
		784	SV *decode_tagged;
		785	SV *err_sv; // optional sv for error, needs to be freed
486	} dec_t;	786	} dec_t;
487		787
488	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	788	// set dec->err to ERRSV
		789	ecb_cold static void
		790	err_errsv (dec_t *dec)
		791	{
		792	if (!dec->err)
		793	{
		794	dec->err_sv = newSVsv (ERRSV);
489		795
490	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	796	// chop off the trailing \n
		797	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		798	*SvEND (dec->err_sv) = 0;
491		799
		800	dec->err = SvPVutf8_nolen (dec->err_sv);
		801	}
		802	}
		803
		804	// the following functions are used to reduce code size and help the compiler to optimise
		805	ecb_cold static void
		806	err_set (dec_t *dec, const char *reason)
		807	{
		808	if (!dec->err)
		809	dec->err = reason;
		810	}
		811
		812	ecb_cold static void
		813	err_unexpected_end (dec_t *dec)
		814	{
		815	err_set (dec, "unexpected end of CBOR data");
		816	}
		817
		818	#define ERR_DO(do) SB do; goto fail; SE
		819	#define ERR(reason) ERR_DO (err_set (dec, reason))
		820	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		821
		822	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		823
492	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	824	#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	825	#define DEC_DEC_DEPTH --dec->depth
494		826
495	static UV	827	static UV
496	decode_uint (dec_t *dec)	828	decode_uint (dec_t *dec)
497	{	829	{
498	switch (*dec->cur & 31)	830	U8 m = *dec->cur & MINOR_MASK;
499	{	831	++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		832
505	case 24:	833	if (ecb_expect_true (m < LENGTH_EXT1))
		834	return m;
		835	else if (ecb_expect_true (m == LENGTH_EXT1))
		836	{
506	WANT (2);	837	WANT (1);
507	dec->cur += 2;	838	dec->cur += 1;
508	return dec->cur[-1];	839	return dec->cur[-1];
509		840	}
510	case 25:	841	else if (ecb_expect_true (m == LENGTH_EXT2))
		842	{
511	WANT (3);	843	WANT (2);
512	dec->cur += 3;	844	dec->cur += 2;
513	return (((UV)dec->cur[-2]) << 8)	845	return (((UV)dec->cur[-2]) << 8)
514	| ((UV)dec->cur[-1]);	846	| ((UV)dec->cur[-1]);
515		847	}
516	case 26:	848	else if (ecb_expect_true (m == LENGTH_EXT4))
		849	{
517	WANT (5);	850	WANT (4);
518	dec->cur += 5;	851	dec->cur += 4;
519	return (((UV)dec->cur[-4]) << 24)	852	return (((UV)dec->cur[-4]) << 24)
520	| (((UV)dec->cur[-3]) << 16)	853	| (((UV)dec->cur[-3]) << 16)
521	| (((UV)dec->cur[-2]) << 8)	854	| (((UV)dec->cur[-2]) << 8)
522	| ((UV)dec->cur[-1]);	855	| ((UV)dec->cur[-1]);
523		856	}
524	case 27:	857	else if (ecb_expect_true (m == LENGTH_EXT8))
		858	{
525	WANT (9);	859	WANT (8);
526	dec->cur += 9;	860	dec->cur += 8;
		861
		862	return
		863	#if UVSIZE < 8
		864	0
		865	#else
527	return (((UV)dec->cur[-8]) << 56)	866	(((UV)dec->cur[-8]) << 56)
528	| (((UV)dec->cur[-7]) << 48)	867	| (((UV)dec->cur[-7]) << 48)
529	| (((UV)dec->cur[-6]) << 40)	868	| (((UV)dec->cur[-6]) << 40)
530	| (((UV)dec->cur[-5]) << 32)	869	| (((UV)dec->cur[-5]) << 32)
		870	#endif
531	| (((UV)dec->cur[-4]) << 24)	871	| (((UV)dec->cur[-4]) << 24)
532	| (((UV)dec->cur[-3]) << 16)	872	| (((UV)dec->cur[-3]) << 16)
533	| (((UV)dec->cur[-2]) << 8)	873	| (((UV)dec->cur[-2]) << 8)
534	| ((UV)dec->cur[-1]);	874	| ((UV)dec->cur[-1]);
535		875	}
536	default:	876	else
537	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	877	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
538	}
539		878
540	fail:	879	fail:
541	return 0;	880	return 0;
542	}	881	}
543		882
…		…
548	{	887	{
549	AV *av = newAV ();	888	AV *av = newAV ();
550		889
551	DEC_INC_DEPTH;	890	DEC_INC_DEPTH;
552		891
553	if ((*dec->cur & 31) == 31)	892	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
554	{	893	{
555	++dec->cur;	894	++dec->cur;
556		895
557	for (;;)	896	for (;;)
558	{	897	{
559	WANT (1);	898	WANT (1);
560		899
561	if (*dec->cur == (0xe0 | 31))	900	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
562	{	901	{
563	++dec->cur;	902	++dec->cur;
564	break;	903	break;
565	}	904	}
566		905
567	av_push (av, decode_sv (dec));	906	av_push (av, decode_sv (dec));
568	}	907	}
569	}	908	}
570	else	909	else
571	{	910	{
572	int i, len = decode_uint (dec);	911	UV i, len = decode_uint (dec);
573		912
		913	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);	914	av_fill (av, len - 1);
575		915
576	for (i = 0; i < len; ++i)	916	for (i = 0; i < len; ++i)
577	AvARRAY (av)[i] = decode_sv (dec);	917	AvARRAY (av)[i] = decode_sv (dec);
578	}	918	}
579		919
580	DEC_DEC_DEPTH;	920	DEC_DEC_DEPTH;
581	return newRV_noinc ((SV *)av);	921	return newRV_noinc ((SV *)av);
582		922
583	fail:	923	fail:
584	SvREFCNT_dec (av);	924	SvREFCNT_dec_NN (av);
585	DEC_DEC_DEPTH;	925	DEC_DEC_DEPTH;
586	return &PL_sv_undef;	926	return &PL_sv_undef;
587	}	927	}
588		928
589	static void	929	static void
590	decode_he (dec_t *dec, HV *hv)	930	decode_he (dec_t *dec, HV *hv)
591	{	931	{
592	// for speed reasons, we specialcase single-string	932	// for speed reasons, we specialcase single-string
593	// byte or utf-8 strings as keys.	933	// byte or utf-8 strings as keys, but only when !stringref
594		934
595	if (*dec->cur >= 0x40 && *dec->cur <= 0x40 + 27)	935	if (ecb_expect_true (!dec->stringref))
		936	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
596	{	937	{
597	I32 len = decode_uint (dec);	938	STRLEN len = decode_uint (dec);
598	char *key = (char *)dec->cur;	939	char *key = (char *)dec->cur;
599		940
		941	WANT (len);
600	dec->cur += len;	942	dec->cur += len;
601		943
602	hv_store (hv, key, len, decode_sv (dec), 0);	944	hv_store (hv, key, len, decode_sv (dec), 0);
		945
		946	return;
603	}	947	}
604	else if (*dec->cur >= 0x60 && *dec->cur <= 0x60 + 27)	948	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
605	{	949	{
606	I32 len = decode_uint (dec);	950	STRLEN len = decode_uint (dec);
607	char *key = (char *)dec->cur;	951	char *key = (char *)dec->cur;
608		952
		953	WANT (len);
609	dec->cur += len;	954	dec->cur += len;
610		955
		956	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		957	if (!is_utf8_string (key, len))
		958	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		959
611	hv_store (hv, key, -len, decode_sv (dec), 0);	960	hv_store (hv, key, -len, decode_sv (dec), 0);
		961
		962	return;
612	}	963	}
613	else	964
614	{
615	SV *k = decode_sv (dec);	965	SV *k = decode_sv (dec);
616	SV *v = decode_sv (dec);	966	SV *v = decode_sv (dec);
617		967
		968	// we leak memory if uncaught exceptions are thrown by random magical
		969	// methods, and this is hopefully the only place where it can happen,
		970	// so if there is a chance of an exception, take the very slow path.
		971	// since catching exceptions is "undocumented/internal/forbidden" by
		972	// the new p5p powers, we need to call out to a perl function :/
		973	if (ecb_expect_false (SvAMAGIC (k)))
		974	{
		975	dSP;
		976
		977	ENTER; SAVETMPS;
		978	PUSHMARK (SP);
		979	EXTEND (SP, 3);
		980	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		981	PUSHs (sv_2mortal (k));
		982	PUSHs (sv_2mortal (v));
		983
		984	PUTBACK;
		985	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		986	SPAGAIN;
		987
		988	FREETMPS; LEAVE;
		989
		990	if (SvTRUE (ERRSV))
		991	ERR_ERRSV;
		992
		993	return;
		994	}
		995
618	hv_store_ent (hv, k, v, 0);	996	hv_store_ent (hv, k, v, 0);
619	SvREFCNT_dec (k);	997	SvREFCNT_dec_NN (k);
620	}	998
		999	fail:
		1000	;
621	}	1001	}
622		1002
623	static SV *	1003	static SV *
624	decode_hv (dec_t *dec)	1004	decode_hv (dec_t *dec)
625	{	1005	{
626	HV *hv = newHV ();	1006	HV *hv = newHV ();
627		1007
628	DEC_INC_DEPTH;	1008	DEC_INC_DEPTH;
629		1009
630	if ((*dec->cur & 31) == 31)	1010	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
631	{	1011	{
632	++dec->cur;	1012	++dec->cur;
633		1013
634	for (;;)	1014	for (;;)
635	{	1015	{
636	WANT (1);	1016	WANT (1);
637		1017
638	if (*dec->cur == (0xe0 | 31))	1018	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
639	{	1019	{
640	++dec->cur;	1020	++dec->cur;
641	break;	1021	break;
642	}	1022	}
643		1023
644	decode_he (dec, hv);	1024	decode_he (dec, hv);
645	}	1025	}
646	}	1026	}
647	else	1027	else
648	{	1028	{
649	int pairs = decode_uint (dec);	1029	UV pairs = decode_uint (dec);
		1030
		1031	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
650		1032
651	while (pairs--)	1033	while (pairs--)
652	decode_he (dec, hv);	1034	decode_he (dec, hv);
653	}	1035	}
654		1036
655	DEC_DEC_DEPTH;	1037	DEC_DEC_DEPTH;
656	return newRV_noinc ((SV *)hv);	1038	return newRV_noinc ((SV *)hv);
657		1039
658	fail:	1040	fail:
659	SvREFCNT_dec (hv);	1041	SvREFCNT_dec_NN (hv);
660	DEC_DEC_DEPTH;	1042	DEC_DEC_DEPTH;
661	return &PL_sv_undef;	1043	return &PL_sv_undef;
662	}	1044	}
663		1045
664	static SV *	1046	static SV *
665	decode_str (dec_t *dec, int utf8)	1047	decode_str (dec_t *dec, int utf8)
666	{	1048	{
667	SV *sv = 0;	1049	SV *sv = 0;
668		1050
669	if ((*dec->cur & 31) == 31)	1051	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
670	{	1052	{
		1053	// indefinite length strings
671	++dec->cur;	1054	++dec->cur;
672		1055
		1056	U8 major = *dec->cur & MAJOR_MISC;
		1057
673	sv = newSVpvn ("", 0);	1058	sv = newSVpvn ("", 0);
674		1059
675	// not very fast, and certainly not robust against illegal input
676	for (;;)	1060	for (;;)
677	{	1061	{
678	WANT (1);	1062	WANT (1);
679		1063
680	if (*dec->cur == (0xe0 | 31))	1064	if ((*dec->cur - major) > LENGTH_EXT8)
		1065	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
681	{	1066	{
682	++dec->cur;	1067	++dec->cur;
683	break;	1068	break;
684	}	1069	}
		1070	else
		1071	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
685		1072
686	sv_catsv (sv, decode_sv (dec));	1073	STRLEN len = decode_uint (dec);
		1074
		1075	WANT (len);
		1076	sv_catpvn (sv, dec->cur, len);
		1077	dec->cur += len;
687	}	1078	}
688	}	1079	}
689	else	1080	else
690	{	1081	{
691	STRLEN len = decode_uint (dec);	1082	STRLEN len = decode_uint (dec);
692		1083
693	WANT (len);	1084	WANT (len);
694	sv = newSVpvn (dec->cur, len);	1085	sv = newSVpvn (dec->cur, len);
695	dec->cur += len;	1086	dec->cur += len;
		1087
		1088	if (ecb_expect_false (dec->stringref)
		1089	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		1090	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
696	}	1091	}
697		1092
698	if (utf8)	1093	if (utf8)
		1094	{
		1095	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		1096	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		1097	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		1098
699	SvUTF8_on (sv);	1099	SvUTF8_on (sv);
		1100	}
700		1101
701	return sv;	1102	return sv;
702		1103
703	fail:	1104	fail:
704	SvREFCNT_dec (sv);	1105	SvREFCNT_dec (sv);
…		…
706	}	1107	}
707		1108
708	static SV *	1109	static SV *
709	decode_tagged (dec_t *dec)	1110	decode_tagged (dec_t *dec)
710	{	1111	{
		1112	SV *sv = 0;
711	UV tag = decode_uint (dec);	1113	UV tag = decode_uint (dec);
		1114
		1115	WANT (1);
		1116
		1117	switch (tag)
		1118	{
		1119	case CBOR_TAG_MAGIC:
712	SV *sv = decode_sv (dec);	1120	sv = decode_sv (dec);
		1121	break;
713		1122
714	if (tag == CBOR_TAG_MAGIC)	1123	case CBOR_TAG_INDIRECTION:
715	return sv;	1124	sv = newRV_noinc (decode_sv (dec));
716	else if (tag == CBOR_TAG_PERL_OBJECT)	1125	break;
717	{	1126
		1127	case CBOR_TAG_STRINGREF_NAMESPACE:
		1128	{
		1129	// do not use SAVETMPS/FREETMPS, as these will
		1130	// erase mortalised caches, e.g. "shareable"
		1131	ENTER;
		1132
		1133	SAVESPTR (dec->stringref);
		1134	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1135
		1136	sv = decode_sv (dec);
		1137
		1138	LEAVE;
		1139	}
		1140	break;
		1141
		1142	case CBOR_TAG_STRINGREF:
		1143	{
		1144	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1145	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1146
		1147	UV idx = decode_uint (dec);
		1148
		1149	if (!dec->stringref || idx >= (UV)(1 + AvFILLp (dec->stringref)))
		1150	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1151
		1152	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1153	}
		1154	break;
		1155
		1156	case CBOR_TAG_VALUE_SHAREABLE:
		1157	{
		1158	if (ecb_expect_false (!dec->shareable))
		1159	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1160
		1161	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1162	{
		1163	sv = newSV (0);
		1164	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1165
		1166	SV *osv = decode_sv (dec);
		1167	sv_setsv (sv, osv);
		1168	SvREFCNT_dec_NN (osv);
		1169	}
		1170	else
		1171	{
		1172	av_push (dec->shareable, &PL_sv_undef);
		1173	int idx = AvFILLp (dec->shareable);
		1174	sv = decode_sv (dec);
		1175	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1176	}
		1177	}
		1178	break;
		1179
		1180	case CBOR_TAG_VALUE_SHAREDREF:
		1181	{
		1182	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1183	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1184
		1185	UV idx = decode_uint (dec);
		1186
		1187	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
		1188	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1189
		1190	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1191
		1192	if (sv == &PL_sv_undef)
		1193	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1194	}
		1195	break;
		1196
		1197	case CBOR_TAG_PERL_OBJECT:
		1198	{
		1199	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1200	goto filter;
		1201
		1202	sv = decode_sv (dec);
		1203
718	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)	1204	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
719	ERR ("corrupted CBOR data (non-array perl object)");	1205	ERR ("corrupted CBOR data (non-array perl object)");
720		1206
721	AV *av = (AV *)SvRV (sv);	1207	AV *av = (AV *)SvRV (sv);
722	int len = av_len (av) + 1;	1208	int len = av_len (av) + 1;
723	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);	1209	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
724		1210
725	if (!stash)	1211	if (!stash)
726	ERR ("cannot decode perl-object (package does not exist)");	1212	ERR ("cannot decode perl-object (package does not exist)");
727		1213
728	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);	1214	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
729		1215
730	if (!method)	1216	if (!method)
731	ERR ("cannot decode perl-object (package does not have a THAW method)");	1217	ERR ("cannot decode perl-object (package does not have a THAW method)");
732		1218
733	dSP;	1219	dSP;
734		1220
735	ENTER; SAVETMPS; PUSHMARK (SP);	1221	ENTER; SAVETMPS;
		1222	PUSHMARK (SP);
736	EXTEND (SP, len + 1);	1223	EXTEND (SP, len + 1);
737	// we re-bless the reference to get overload and other niceties right	1224	// we re-bless the reference to get overload and other niceties right
738	PUSHs (*av_fetch (av, 0, 1));	1225	PUSHs (*av_fetch (av, 0, 1));
739	PUSHs (sv_cbor);	1226	PUSHs (sv_cbor);
740		1227
741	int i;	1228	int i;
742		1229
743	for (i = 1; i < len; ++i)	1230	for (i = 1; i < len; ++i)
744	PUSHs (*av_fetch (av, i, 1));	1231	PUSHs (*av_fetch (av, i, 1));
745		1232
746	PUTBACK;	1233	PUTBACK;
747	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);	1234	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
748	SPAGAIN;	1235	SPAGAIN;
749		1236
750	if (SvTRUE (ERRSV))	1237	if (SvTRUE (ERRSV))
751	{	1238	{
		1239	FREETMPS; LEAVE;
		1240	ERR_ERRSV;
		1241	}
		1242
		1243	SvREFCNT_dec_NN (sv);
		1244	sv = SvREFCNT_inc (POPs);
		1245
		1246	PUTBACK;
		1247
752	FREETMPS; LEAVE;	1248	FREETMPS; LEAVE;
753	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));	1249	}
		1250	break;
		1251
		1252	default:
		1253	filter:
754	}	1254	{
		1255	SV *tag_sv = newSVuv (tag);
755		1256
756	SvREFCNT_dec (sv);	1257	sv = decode_sv (dec);
757	sv = SvREFCNT_inc (POPs);
758		1258
		1259	dSP;
		1260	ENTER; SAVETMPS;
		1261	PUSHMARK (SP);
		1262	EXTEND (SP, 2);
		1263	PUSHs (tag_sv);
		1264	PUSHs (sv);
		1265
759	PUTBACK;	1266	PUTBACK;
		1267	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1268	SPAGAIN;
760		1269
		1270	if (SvTRUE (ERRSV))
		1271	{
		1272	SvREFCNT_dec_NN (tag_sv);
761	FREETMPS; LEAVE;	1273	FREETMPS; LEAVE;
		1274	ERR_ERRSV;
		1275	}
762		1276
763	return sv;	1277	if (count)
764	}	1278	{
765	else	1279	SvREFCNT_dec_NN (tag_sv);
766	{	1280	SvREFCNT_dec_NN (sv);
		1281	sv = SvREFCNT_inc_NN (TOPs);
		1282	SP -= count;
		1283	}
		1284	else
		1285	{
767	AV *av = newAV ();	1286	AV *av = newAV ();
768	av_push (av, newSVuv (tag));	1287	av_push (av, tag_sv);
769	av_push (av, sv);	1288	av_push (av, sv);
770		1289
771	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	1290	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
772	? cbor_tagged_stash	1291	? cbor_tagged_stash
773	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1292	: gv_stashpv ("CBOR::XS::Tagged" , 1);
774
775	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);	1293	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1294	}
		1295
		1296	PUTBACK;
		1297
		1298	FREETMPS; LEAVE;
		1299	}
		1300	break;
776	}	1301	}
		1302
		1303	return sv;
777		1304
778	fail:	1305	fail:
779	SvREFCNT_dec (sv);	1306	SvREFCNT_dec (sv);
780	return &PL_sv_undef;	1307	return &PL_sv_undef;
781	}	1308	}
…		…
783	static SV *	1310	static SV *
784	decode_sv (dec_t *dec)	1311	decode_sv (dec_t *dec)
785	{	1312	{
786	WANT (1);	1313	WANT (1);
787		1314
788	switch (*dec->cur >> 5)	1315	switch (*dec->cur >> MAJOR_SHIFT)
789	{	1316	{
790	case 0: // unsigned int	1317	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
791	return newSVuv (decode_uint (dec));	1318	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
792	case 1: // negative int	1319	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
793	return newSViv (-1 - (IV)decode_uint (dec));	1320	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
794	case 2: // octet string	1321	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
795	return decode_str (dec, 0);	1322	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
796	case 3: // utf-8 string	1323	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
797	return decode_str (dec, 1);	1324
798	case 4: // array	1325	case MAJOR_MISC >> MAJOR_SHIFT:
799	return decode_av (dec);
800	case 5: // map
801	return decode_hv (dec);
802	case 6: // tag
803	return decode_tagged (dec);
804	case 7: // misc
805	switch (*dec->cur++ & 31)	1326	switch (*dec->cur++ & MINOR_MASK)
806	{	1327	{
807	case 20:	1328	case SIMPLE_FALSE:
808	#if CBOR_SLOW	1329	#if CBOR_SLOW
809	types_false = get_bool ("Types::Serialiser::false");	1330	types_false = get_bool ("Types::Serialiser::false");
810	#endif	1331	#endif
811	return newSVsv (types_false);	1332	return newSVsv (types_false);
812	case 21:	1333	case SIMPLE_TRUE:
813	#if CBOR_SLOW	1334	#if CBOR_SLOW
814	types_true = get_bool ("Types::Serialiser::true");	1335	types_true = get_bool ("Types::Serialiser::true");
815	#endif	1336	#endif
816	return newSVsv (types_true);	1337	return newSVsv (types_true);
817	case 22:	1338	case SIMPLE_NULL:
818	return newSVsv (&PL_sv_undef);	1339	return newSVsv (&PL_sv_undef);
819	case 23:	1340	case SIMPLE_UNDEF:
820	#if CBOR_SLOW	1341	#if CBOR_SLOW
821	types_error = get_bool ("Types::Serialiser::error");	1342	types_error = get_bool ("Types::Serialiser::error");
822	#endif	1343	#endif
823	return newSVsv (types_error);	1344	return newSVsv (types_error);
824		1345
825	case 25:	1346	case MISC_FLOAT16:
826	{	1347	{
827	WANT (2);	1348	WANT (2);
828		1349
829	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1350	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
830	dec->cur += 2;	1351	dec->cur += 2;
831		1352
832	return newSVnv (ecb_binary16_to_float (fp));	1353	return newSVnv (ecb_binary16_to_float (fp));
833	}	1354	}
834		1355
835	case 26:	1356	case MISC_FLOAT32:
836	{	1357	{
837	uint32_t fp;	1358	uint32_t fp;
838	WANT (4);	1359	WANT (4);
839	memcpy (&fp, dec->cur, 4);	1360	memcpy (&fp, dec->cur, 4);
840	dec->cur += 4;	1361	dec->cur += 4;
…		…
843	fp = ecb_bswap32 (fp);	1364	fp = ecb_bswap32 (fp);
844		1365
845	return newSVnv (ecb_binary32_to_float (fp));	1366	return newSVnv (ecb_binary32_to_float (fp));
846	}	1367	}
847		1368
848	case 27:	1369	case MISC_FLOAT64:
849	{	1370	{
850	uint64_t fp;	1371	uint64_t fp;
851	WANT (8);	1372	WANT (8);
852	memcpy (&fp, dec->cur, 8);	1373	memcpy (&fp, dec->cur, 8);
853	dec->cur += 8;	1374	dec->cur += 8;
…		…
856	fp = ecb_bswap64 (fp);	1377	fp = ecb_bswap64 (fp);
857		1378
858	return newSVnv (ecb_binary64_to_double (fp));	1379	return newSVnv (ecb_binary64_to_double (fp));
859	}	1380	}
860		1381
861	// 0..19 unassigned	1382	// 0..19 unassigned simple
862	// 24 reserved + unassigned (reserved values are not encodable)	1383	// 24 reserved + unassigned simple (reserved values are not encodable)
		1384	// 28-30 unassigned misc
		1385	// 31 break code
863	default:	1386	default:
864	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1387	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
865	}	1388	}
866		1389
867	break;	1390	break;
868	}	1391	}
869		1392
…		…
872	}	1395	}
873		1396
874	static SV *	1397	static SV *
875	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1398	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
876	{	1399	{
877	dec_t dec;	1400	dec_t dec = { 0 };
878	SV *sv;	1401	SV *sv;
879	STRLEN len;	1402	STRLEN len;
880	char *data = SvPVbyte (string, len);	1403	char *data = SvPVbyte (string, len);
881		1404
882	if (len > cbor->max_size && cbor->max_size)	1405	if (len > cbor->max_size && cbor->max_size)
…		…
884	(unsigned long)len, (unsigned long)cbor->max_size);	1407	(unsigned long)len, (unsigned long)cbor->max_size);
885		1408
886	dec.cbor = *cbor;	1409	dec.cbor = *cbor;
887	dec.cur = (U8 *)data;	1410	dec.cur = (U8 *)data;
888	dec.end = (U8 *)data + len;	1411	dec.end = (U8 *)data + len;
889	dec.err = 0;
890	dec.depth = 0;
891		1412
892	sv = decode_sv (&dec);	1413	sv = decode_sv (&dec);
893		1414
894	if (offset_return)	1415	if (offset_return)
895	*offset_return = dec.cur;	1416	*offset_return = dec.cur;
…		…
898	if (dec.cur != dec.end && !dec.err)	1419	if (dec.cur != dec.end && !dec.err)
899	dec.err = "garbage after CBOR object";	1420	dec.err = "garbage after CBOR object";
900		1421
901	if (dec.err)	1422	if (dec.err)
902	{	1423	{
		1424	if (dec.shareable)
		1425	{
		1426	// need to break cyclic links, which would all be in shareable
		1427	int i;
		1428	SV **svp;
		1429
		1430	for (i = av_len (dec.shareable) + 1; i--; )
		1431	if ((svp = av_fetch (dec.shareable, i, 0)))
		1432	sv_setsv (*svp, &PL_sv_undef);
		1433	}
		1434
903	SvREFCNT_dec (sv);	1435	SvREFCNT_dec_NN (sv);
		1436
		1437	if (dec.err_sv)
		1438	sv_2mortal (dec.err_sv);
		1439
904	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);	1440	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
905	}	1441	}
906		1442
907	sv = sv_2mortal (sv);	1443	sv = sv_2mortal (sv);
908		1444
909	return sv;	1445	return sv;
910	}	1446	}
911		1447
		1448	/////////////////////////////////////////////////////////////////////////////
		1449	// incremental parser
		1450
		1451	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1452
		1453	// returns 0 for notyet, 1 for success or error
		1454	static int
		1455	incr_parse (CBOR *self, SV *cborstr)
		1456	{
		1457	STRLEN cur;
		1458	SvPV (cborstr, cur);
		1459
		1460	while (ecb_expect_true (self->incr_need <= cur))
		1461	{
		1462	// table of integer count bytes
		1463	static I8 incr_len[MINOR_MASK + 1] = {
		1464	0, 0, 0, 0, 0, 0, 0, 0,
		1465	0, 0, 0, 0, 0, 0, 0, 0,
		1466	0, 0, 0, 0, 0, 0, 0, 0,
		1467	1, 2, 4, 8,-1,-1,-1,-2
		1468	};
		1469
		1470	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1471	U8 m = *p & MINOR_MASK;
		1472	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1473	I8 ilen = incr_len[m];
		1474
		1475	self->incr_need = self->incr_pos + 1;
		1476
		1477	if (ecb_expect_false (ilen < 0))
		1478	{
		1479	if (m != MINOR_INDEF)
		1480	return 1; // error
		1481
		1482	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1483	{
		1484	if (count >= 0)
		1485	return 1; // error
		1486
		1487	count = 1;
		1488	}
		1489	else
		1490	{
		1491	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1492	count = -1;
		1493	}
		1494	}
		1495	else
		1496	{
		1497	self->incr_need += ilen;
		1498	if (ecb_expect_false (self->incr_need > cur))
		1499	return 0;
		1500
		1501	int major = *p >> MAJOR_SHIFT;
		1502
		1503	switch (major)
		1504	{
		1505	case MAJOR_TAG >> MAJOR_SHIFT:
		1506	++count; // tags merely prefix another value
		1507	break;
		1508
		1509	case MAJOR_BYTES >> MAJOR_SHIFT:
		1510	case MAJOR_TEXT >> MAJOR_SHIFT:
		1511	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1512	case MAJOR_MAP >> MAJOR_SHIFT:
		1513	{
		1514	UV len;
		1515
		1516	if (ecb_expect_false (ilen))
		1517	{
		1518	len = 0;
		1519
		1520	do {
		1521	len = (len << 8) | *++p;
		1522	} while (--ilen);
		1523	}
		1524	else
		1525	len = m;
		1526
		1527	switch (major)
		1528	{
		1529	case MAJOR_BYTES >> MAJOR_SHIFT:
		1530	case MAJOR_TEXT >> MAJOR_SHIFT:
		1531	self->incr_need += len;
		1532	if (ecb_expect_false (self->incr_need > cur))
		1533	return 0;
		1534
		1535	break;
		1536
		1537	case MAJOR_MAP >> MAJOR_SHIFT:
		1538	len <<= 1;
		1539	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1540	if (len)
		1541	{
		1542	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1543	count = len + 1;
		1544	}
		1545	break;
		1546	}
		1547	}
		1548	}
		1549	}
		1550
		1551	self->incr_pos = self->incr_need;
		1552
		1553	if (count > 0)
		1554	{
		1555	while (!--count)
		1556	{
		1557	if (!AvFILLp (self->incr_count))
		1558	return 1; // done
		1559
		1560	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1561	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1562	}
		1563
		1564	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1565	}
		1566	}
		1567
		1568	return 0;
		1569	}
		1570
		1571
912	/////////////////////////////////////////////////////////////////////////////	1572	/////////////////////////////////////////////////////////////////////////////
913	// XS interface functions	1573	// XS interface functions
914		1574
915	MODULE = CBOR::XS PACKAGE = CBOR::XS	1575	MODULE = CBOR::XS PACKAGE = CBOR::XS
916		1576
…		…
924		1584
925	types_true = get_bool ("Types::Serialiser::true" );	1585	types_true = get_bool ("Types::Serialiser::true" );
926	types_false = get_bool ("Types::Serialiser::false");	1586	types_false = get_bool ("Types::Serialiser::false");
927	types_error = get_bool ("Types::Serialiser::error");	1587	types_error = get_bool ("Types::Serialiser::error");
928		1588
		1589	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1590
929	sv_cbor = newSVpv ("CBOR", 0);	1591	sv_cbor = newSVpv ("CBOR", 0);
930	SvREADONLY_on (sv_cbor);	1592	SvREADONLY_on (sv_cbor);
		1593
		1594	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
931	}	1595	}
932		1596
933	PROTOTYPES: DISABLE	1597	PROTOTYPES: DISABLE
934		1598
935	void CLONE (...)	1599	void CLONE (...)
…		…
953		1617
954	void shrink (CBOR *self, int enable = 1)	1618	void shrink (CBOR *self, int enable = 1)
955	ALIAS:	1619	ALIAS:
956	shrink = F_SHRINK	1620	shrink = F_SHRINK
957	allow_unknown = F_ALLOW_UNKNOWN	1621	allow_unknown = F_ALLOW_UNKNOWN
		1622	allow_sharing = F_ALLOW_SHARING
		1623	allow_cycles = F_ALLOW_CYCLES
		1624	forbid_objects = F_FORBID_OBJECTS
		1625	pack_strings = F_PACK_STRINGS
		1626	text_keys = F_TEXT_KEYS
		1627	text_strings = F_TEXT_STRINGS
		1628	validate_utf8 = F_VALIDATE_UTF8
958	PPCODE:	1629	PPCODE:
959	{	1630	{
960	if (enable)	1631	if (enable)
961	self->flags |= ix;	1632	self->flags |= ix;
962	else	1633	else
…		…
967		1638
968	void get_shrink (CBOR *self)	1639	void get_shrink (CBOR *self)
969	ALIAS:	1640	ALIAS:
970	get_shrink = F_SHRINK	1641	get_shrink = F_SHRINK
971	get_allow_unknown = F_ALLOW_UNKNOWN	1642	get_allow_unknown = F_ALLOW_UNKNOWN
		1643	get_allow_sharing = F_ALLOW_SHARING
		1644	get_allow_cycles = F_ALLOW_CYCLES
		1645	get_forbid_objects = F_FORBID_OBJECTS
		1646	get_pack_strings = F_PACK_STRINGS
		1647	get_text_keys = F_TEXT_KEYS
		1648	get_text_strings = F_TEXT_STRINGS
		1649	get_validate_utf8 = F_VALIDATE_UTF8
972	PPCODE:	1650	PPCODE:
973	XPUSHs (boolSV (self->flags & ix));	1651	XPUSHs (boolSV (self->flags & ix));
974		1652
975	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1653	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
976	PPCODE:	1654	PPCODE:
…		…
989	XPUSHs (ST (0));	1667	XPUSHs (ST (0));
990		1668
991	int get_max_size (CBOR *self)	1669	int get_max_size (CBOR *self)
992	CODE:	1670	CODE:
993	RETVAL = self->max_size;	1671	RETVAL = self->max_size;
		1672	OUTPUT:
		1673	RETVAL
		1674
		1675	void filter (CBOR *self, SV *filter = 0)
		1676	PPCODE:
		1677	SvREFCNT_dec (self->filter);
		1678	self->filter = filter ? newSVsv (filter) : filter;
		1679	XPUSHs (ST (0));
		1680
		1681	SV *get_filter (CBOR *self)
		1682	CODE:
		1683	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
994	OUTPUT:	1684	OUTPUT:
995	RETVAL	1685	RETVAL
996		1686
997	void encode (CBOR *self, SV *scalar)	1687	void encode (CBOR *self, SV *scalar)
998	PPCODE:	1688	PPCODE:
…		…
1013	EXTEND (SP, 2);	1703	EXTEND (SP, 2);
1014	PUSHs (sv);	1704	PUSHs (sv);
1015	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1705	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1016	}	1706	}
1017		1707
		1708	void incr_parse (CBOR *self, SV *cborstr)
		1709	ALIAS:
		1710	incr_parse_multiple = 1
		1711	PPCODE:
		1712	{
		1713	if (SvUTF8 (cborstr))
		1714	sv_utf8_downgrade (cborstr, 0);
		1715
		1716	if (!self->incr_count)
		1717	{
		1718	self->incr_count = newAV ();
		1719	self->incr_pos = 0;
		1720	self->incr_need = 1;
		1721
		1722	av_push (self->incr_count, newSViv (1));
		1723	}
		1724
		1725	do
		1726	{
		1727	if (!incr_parse (self, cborstr))
		1728	{
		1729	if (self->incr_need > self->max_size && self->max_size)
		1730	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1731	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1732
		1733	break;
		1734	}
		1735
		1736	SV *sv;
		1737	char *offset;
		1738
		1739	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1740	XPUSHs (sv);
		1741
		1742	sv_chop (cborstr, offset);
		1743
		1744	av_clear (self->incr_count);
		1745	av_push (self->incr_count, newSViv (1));
		1746
		1747	self->incr_pos = 0;
		1748	self->incr_need = self->incr_pos + 1;
		1749	}
		1750	while (ix);
		1751	}
		1752
		1753	void incr_reset (CBOR *self)
		1754	CODE:
		1755	{
		1756	SvREFCNT_dec (self->incr_count);
		1757	self->incr_count = 0;
		1758	}
		1759
		1760	void DESTROY (CBOR *self)
		1761	PPCODE:
		1762	cbor_free (self);
		1763
1018	PROTOTYPES: ENABLE	1764	PROTOTYPES: ENABLE
1019		1765
1020	void encode_cbor (SV *scalar)	1766	void encode_cbor (SV *scalar)
		1767	ALIAS:
		1768	encode_cbor = 0
		1769	encode_cbor_sharing = F_ALLOW_SHARING
1021	PPCODE:	1770	PPCODE:
1022	{	1771	{
1023	CBOR cbor;	1772	CBOR cbor;
1024	cbor_init (&cbor);	1773	cbor_init (&cbor);
		1774	cbor.flags |= ix;
1025	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1775	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1026	XPUSHs (scalar);	1776	XPUSHs (scalar);
1027	}	1777	}
1028		1778
1029	void decode_cbor (SV *cborstr)	1779	void decode_cbor (SV *cborstr)
…		…
1033	cbor_init (&cbor);	1783	cbor_init (&cbor);
1034	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1784	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1035	XPUSHs (cborstr);	1785	XPUSHs (cborstr);
1036	}	1786	}
1037		1787
		1788	#ifdef __AFL_COMPILER
		1789
		1790	void
		1791	afl_init ()
		1792	CODE:
		1793	__AFL_INIT ();
		1794
		1795	int
		1796	afl_loop (unsigned int count = 10000)
		1797	CODE:
		1798	RETVAL = __AFL_LOOP (count);
		1799	OUTPUT:
		1800	RETVAL
		1801
		1802	#endif
		1803

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