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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.19 by root, Wed Nov 20 02:03:09 2013 UTC vs.
Revision 1.75 by root, Thu Sep 7 23:52:24 2023 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	// perl's is_utf8_string interprets len=0 as "calculate len", but we want it to mean 0
		34	#define cbor_is_utf8_string(str,len) (!(len) || is_utf8_string ((str), (len)))
		35
		36	// known major and minor types
		37	enum cbor_type
		38	{
		39	MAJOR_SHIFT = 5,
		40	MINOR_MASK = 0x1f,
		41
		42	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		43	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		44	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		45	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		46	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		47	MAJOR_MAP = 5 << MAJOR_SHIFT,
		48	MAJOR_TAG = 6 << MAJOR_SHIFT,
		49	MAJOR_MISC = 7 << MAJOR_SHIFT,
		50
		51	// INT/STRING/ARRAY/MAP subtypes
		52	LENGTH_EXT1 = 24,
		53	LENGTH_EXT2 = 25,
		54	LENGTH_EXT4 = 26,
		55	LENGTH_EXT8 = 27,
		56
		57	// SIMPLE types (effectively MISC subtypes)
		58	SIMPLE_FALSE = 20,
		59	SIMPLE_TRUE = 21,
		60	SIMPLE_NULL = 22,
		61	SIMPLE_UNDEF = 23,
		62
		63	// MISC subtype (unused)
		64	MISC_EXT1 = 24,
		65	MISC_FLOAT16 = 25,
		66	MISC_FLOAT32 = 26,
		67	MISC_FLOAT64 = 27,
		68
		69	// BYTES/TEXT/ARRAY/MAP
		70	MINOR_INDEF = 31,
		71	};
24		72
25	// known tags	73	// known tags
26	enum cbor_tag	74	enum cbor_tag
27	{	75	{
28	// inofficial extensions (pending iana registration)	76	// extensions
		77	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
29	CBOR_TAG_PERL_OBJECT = 24, // http://cbor.schmorp.de/perl-object	78	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
30	CBOR_TAG_GENERIC_OBJECT = 25, // http://cbor.schmorp.de/generic-object	79	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
31	CBOR_TAG_VALUE_SHAREABLE = 26, // http://cbor.schmorp.de/value-sharing	80	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
32	CBOR_TAG_VALUE_SHAREDREF = 27, // http://cbor.schmorp.de/value-sharing	81	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
33	CBOR_TAG_STRINGREF_NAMESPACE = 65537, // http://cbor.schmorp.de/stringref	82	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
34	CBOR_TAG_STRINGREF = 28, // http://cbor.schmorp.de/stringref
35	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection	83	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
36		84
37	// rfc7049	85	// rfc7049
38	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	86	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
39	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	87	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
40	CBOR_TAG_POS_BIGNUM = 2, // byte string	88	CBOR_TAG_POS_BIGNUM = 2, // byte string
41	CBOR_TAG_NEG_BIGNUM = 3, // byte string	89	CBOR_TAG_NEG_BIGNUM = 3, // byte string
42	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	90	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
43	CBOR_TAG_BIGFLOAT = 5, // array	91	CBOR_TAG_BIGFLOAT = 5, // array
44		92
45	CBOR_TAG_CONV_B64U = 21, // base64url, any	93	CBOR_TAG_CONV_B64U = 21, // base64url, any
46	CBOR_TAG_CONV_B64 = 22, // base64, any	94	CBOR_TAG_CONV_B64 = 22, // base64, any
47	CBOR_TAG_CONV_HEX = 23, // base16, any	95	CBOR_TAG_CONV_HEX = 23, // base16, any
48	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	96	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
49		97
50	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	98	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
51	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	99	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
52	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	100	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
53	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	101	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
54	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	102	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
55		103
56	CBOR_TAG_MAGIC = 55799 // self-describe cbor	104	CBOR_TAG_MAGIC = 55799, // self-describe cbor
57	};	105	};
58		106
		107	// known forced types, also hardcoded in CBOR.pm
		108	enum
		109	{
		110	AS_CBOR = 0,
		111	AS_INT = 1,
		112	AS_BYTES = 2,
		113	AS_TEXT = 3,
		114	AS_FLOAT16 = 4,
		115	AS_FLOAT32 = 5,
		116	AS_FLOAT64 = 6,
		117	AS_MAP = 7,
		118	// possibly future enhancements: (generic) float, (generic) string
		119	};
		120
59	#define F_SHRINK 0x00000001UL	121	#define F_SHRINK 0x00000001UL
60	#define F_ALLOW_UNKNOWN 0x00000002UL	122	#define F_ALLOW_UNKNOWN 0x00000002UL
61	#define F_ALLOW_SHARING 0x00000004UL //TODO	123	#define F_ALLOW_SHARING 0x00000004UL
		124	#define F_ALLOW_CYCLES 0x00000008UL
		125	#define F_FORBID_OBJECTS 0x00000010UL
62	#define F_DEDUP_STRINGS 0x00000008UL //TODO	126	#define F_PACK_STRINGS 0x00000020UL
63	#define F_DEDUP_KEYS 0x00000010UL //TODO	127	#define F_TEXT_KEYS 0x00000040UL
		128	#define F_TEXT_STRINGS 0x00000080UL
		129	#define F_VALIDATE_UTF8 0x00000100UL
64		130
65	#define INIT_SIZE 32 // initial scalar size to be allocated	131	#define INIT_SIZE 32 // initial scalar size to be allocated
66		132
67	#define SB do {	133	#define SB do {
68	#define SE } while (0)	134	#define SE } while (0)
…		…
80	# define CBOR_SLOW 0	146	# define CBOR_SLOW 0
81	# define CBOR_STASH cbor_stash	147	# define CBOR_STASH cbor_stash
82	#endif	148	#endif
83		149
84	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::	150	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
85	static SV *types_true, *types_false, *types_error, *sv_cbor;	151	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
86		152
87	typedef struct {	153	typedef struct {
88	U32 flags;	154	U32 flags;
89	U32 max_depth;	155	U32 max_depth;
90	STRLEN max_size;	156	STRLEN max_size;
		157	SV *filter;
		158
		159	// for the incremental parser
		160	STRLEN incr_pos; // the current offset into the text
		161	STRLEN incr_need; // minimum bytes needed to decode
		162	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
91	} CBOR;	163	} CBOR;
92		164
93	ecb_inline void	165	ecb_inline void
94	cbor_init (CBOR *cbor)	166	cbor_init (CBOR *cbor)
95	{	167	{
96	Zero (cbor, 1, CBOR);	168	Zero (cbor, 1, CBOR);
97	cbor->max_depth = 512;	169	cbor->max_depth = 512;
		170	}
		171
		172	ecb_inline void
		173	cbor_free (CBOR *cbor)
		174	{
		175	SvREFCNT_dec (cbor->filter);
		176	SvREFCNT_dec (cbor->incr_count);
98	}	177	}
99		178
100	/////////////////////////////////////////////////////////////////////////////	179	/////////////////////////////////////////////////////////////////////////////
101	// utility functions	180	// utility functions
102		181
…		…
124	SvPV_renew (sv, SvCUR (sv) + 1);	203	SvPV_renew (sv, SvCUR (sv) + 1);
125	#endif	204	#endif
126	}	205	}
127	}	206	}
128		207
		208	// minimum length of a string to be registered for stringref
		209	ecb_inline STRLEN
		210	minimum_string_length (UV idx)
		211	{
		212	return idx <= 23 ? 3
		213	: idx <= 0xffU ? 4
		214	: idx <= 0xffffU ? 5
		215	: idx <= 0xffffffffU ? 7
		216	: 11;
		217	}
		218
129	/////////////////////////////////////////////////////////////////////////////	219	/////////////////////////////////////////////////////////////////////////////
130	// encoder	220	// encoder
131		221
132	// structure used for encoding CBOR	222	// structure used for encoding CBOR
133	typedef struct	223	typedef struct
…		…
135	char *cur; // SvPVX (sv) + current output position	225	char *cur; // SvPVX (sv) + current output position
136	char *end; // SvEND (sv)	226	char *end; // SvEND (sv)
137	SV *sv; // result scalar	227	SV *sv; // result scalar
138	CBOR cbor;	228	CBOR cbor;
139	U32 depth; // recursion level	229	U32 depth; // recursion level
140	HV *stringref; // string => index, or 0	230	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		231	UV stringref_idx;
141	HV *shareable; // ptr => index, or 0	232	HV *shareable; // ptr => index, or 0
142	UV shareable_idx;	233	UV shareable_idx;
143	} enc_t;	234	} enc_t;
144		235
145	ecb_inline void	236	ecb_inline void
146	need (enc_t *enc, STRLEN len)	237	need (enc_t *enc, STRLEN len)
147	{	238	{
148	if (ecb_expect_false (enc->cur + len >= enc->end))	239	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
149	{	240	{
150	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	241	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
151	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	242	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
152	enc->cur = SvPVX (enc->sv) + cur;	243	enc->cur = SvPVX (enc->sv) + cur;
153	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	244	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
154	}	245	}
155	}	246	}
156		247
		248	static void encode_sv (enc_t *enc, SV *sv);
		249
157	ecb_inline void	250	ecb_inline void
158	encode_ch (enc_t *enc, char ch)	251	encode_ch (enc_t *enc, char ch)
159	{	252	{
160	need (enc, 1);	253	need (enc, 1);
161	*enc->cur++ = ch;	254	*enc->cur++ = ch;
162	}	255	}
163		256
		257	// used for tags, intregers, element counts and so on
164	static void	258	static void
165	encode_uint (enc_t *enc, int major, UV len)	259	encode_uint (enc_t *enc, int major, UV len)
166	{	260	{
167	need (enc, 9);	261	need (enc, 9);
168		262
169	if (len < 24)	263	if (ecb_expect_true (len < LENGTH_EXT1))
170	*enc->cur++ = major | len;	264	*enc->cur++ = major | len;
171	else if (len <= 0xff)	265	else if (ecb_expect_true (len <= 0xffU))
172	{	266	{
173	*enc->cur++ = major | 24;	267	*enc->cur++ = major | LENGTH_EXT1;
174	*enc->cur++ = len;	268	*enc->cur++ = len;
175	}	269	}
176	else if (len <= 0xffff)	270	else if (len <= 0xffffU)
177	{	271	{
178	*enc->cur++ = major | 25;	272	*enc->cur++ = major | LENGTH_EXT2;
179	*enc->cur++ = len >> 8;	273	*enc->cur++ = len >> 8;
180	*enc->cur++ = len;	274	*enc->cur++ = len;
181	}	275	}
182	else if (len <= 0xffffffff)	276	else if (len <= 0xffffffffU)
183	{	277	{
184	*enc->cur++ = major | 26;	278	*enc->cur++ = major | LENGTH_EXT4;
185	*enc->cur++ = len >> 24;	279	*enc->cur++ = len >> 24;
186	*enc->cur++ = len >> 16;	280	*enc->cur++ = len >> 16;
187	*enc->cur++ = len >> 8;	281	*enc->cur++ = len >> 8;
188	*enc->cur++ = len;	282	*enc->cur++ = len;
189	}	283	}
190	else	284	else
191	{	285	{
192	*enc->cur++ = major | 27;	286	*enc->cur++ = major | LENGTH_EXT8;
193	*enc->cur++ = len >> 56;	287	*enc->cur++ = len >> 56;
194	*enc->cur++ = len >> 48;	288	*enc->cur++ = len >> 48;
195	*enc->cur++ = len >> 40;	289	*enc->cur++ = len >> 40;
196	*enc->cur++ = len >> 32;	290	*enc->cur++ = len >> 32;
197	*enc->cur++ = len >> 24;	291	*enc->cur++ = len >> 24;
…		…
199	*enc->cur++ = len >> 8;	293	*enc->cur++ = len >> 8;
200	*enc->cur++ = len;	294	*enc->cur++ = len;
201	}	295	}
202	}	296	}
203		297
204	static void	298	// encodes a perl value into a CBOR integer
		299	ecb_inline void
		300	encode_int (enc_t *enc, SV *sv)
		301	{
		302	if (SvIsUV (sv))
		303	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
		304	else if (SvIVX (sv) >= 0)
		305	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
		306	else
		307	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
		308	}
		309
		310	ecb_inline void
		311	encode_tag (enc_t *enc, UV tag)
		312	{
		313	encode_uint (enc, MAJOR_TAG, tag);
		314	}
		315
		316	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		317	ecb_noinline static void
205	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	318	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
206	{	319	{
207	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	320	STRLEN ulen = len;
		321	U8 *p, *pend = (U8 *)str + len;
		322
		323	for (p = (U8 *)str; p < pend; ++p)
		324	ulen += *p >> 7; // count set high bits
		325
		326	encode_uint (enc, MAJOR_TEXT, ulen);
		327
		328	need (enc, ulen);
		329	for (p = (U8 *)str; p < pend; ++p)
		330	if (*p < 0x80)
		331	*enc->cur++ = *p;
		332	else
		333	{
		334	*enc->cur++ = 0xc0 + (*p >> 6);
		335	*enc->cur++ = 0x80 + (*p & 63);
		336	}
		337	}
		338
		339	ecb_inline void
		340	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		341	{
		342	if (ecb_expect_false (upgrade_utf8))
		343	if (!utf8)
		344	{
		345	encode_str_utf8 (enc, utf8, str, len);
		346	return;
		347	}
		348
		349	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
208	need (enc, len);	350	need (enc, len);
209	memcpy (enc->cur, str, len);	351	memcpy (enc->cur, str, len);
210	enc->cur += len;	352	enc->cur += len;
211	}	353	}
212		354
213	ecb_inline void	355	ecb_inline void
		356	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		357	{
		358	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		359	{
		360	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		361
		362	if (SvOK (*svp))
		363	{
		364	// already registered, use stringref
		365	encode_tag (enc, CBOR_TAG_STRINGREF);
		366	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		367	return;
		368	}
		369	else if (len >= minimum_string_length (enc->stringref_idx))
		370	{
		371	// register only
		372	sv_setuv (*svp, enc->stringref_idx);
		373	++enc->stringref_idx;
		374	}
		375	}
		376
		377	encode_str (enc, upgrade_utf8, utf8, str, len);
		378	}
		379
		380	ecb_inline void
214	encode_tag (enc_t *enc, UV tag)	381	encode_float16 (enc_t *enc, NV nv)
215	{	382	{
216	encode_uint (enc, 0xc0, tag);	383	need (enc, 1+2);
217	}
218		384
219	static void encode_sv (enc_t *enc, SV *sv);	385	*enc->cur++ = MAJOR_MISC | MISC_FLOAT16;
		386
		387	uint16_t fp = ecb_float_to_binary16 (nv);
		388
		389	if (!ecb_big_endian ())
		390	fp = ecb_bswap16 (fp);
		391
		392	memcpy (enc->cur, &fp, 2);
		393	enc->cur += 2;
		394	}
		395
		396	ecb_inline void
		397	encode_float32 (enc_t *enc, NV nv)
		398	{
		399	need (enc, 1+4);
		400
		401	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
		402
		403	uint32_t fp = ecb_float_to_binary32 (nv);
		404
		405	if (!ecb_big_endian ())
		406	fp = ecb_bswap32 (fp);
		407
		408	memcpy (enc->cur, &fp, 4);
		409	enc->cur += 4;
		410	}
		411
		412	ecb_inline void
		413	encode_float64 (enc_t *enc, NV nv)
		414	{
		415	need (enc, 1+8);
		416
		417	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
		418
		419	uint64_t fp = ecb_double_to_binary64 (nv);
		420
		421	if (!ecb_big_endian ())
		422	fp = ecb_bswap64 (fp);
		423
		424	memcpy (enc->cur, &fp, 8);
		425	enc->cur += 8;
		426	}
		427
		428	ecb_inline void
		429	encode_bool (enc_t *enc, int istrue)
		430	{
		431	encode_ch (enc, istrue ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		432	}
		433
		434	// encodes an arrayref containing key-value pairs as CBOR map
		435	ecb_inline void
		436	encode_array_as_map (enc_t *enc, SV *sv)
		437	{
		438	if (enc->depth >= enc->cbor.max_depth)
		439	croak (ERR_NESTING_EXCEEDED);
		440
		441	++enc->depth;
		442
		443	// as_map does error checking for us, but we re-check in case
		444	// things have changed.
		445
		446	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		447	croak ("CBOR::XS::as_map requires an array reference (did you change the array after calling as_map?)");
		448
		449	AV *av = (AV *)SvRV (sv);
		450	int i, len = av_len (av);
		451
		452	if (!(len & 1))
		453	croak ("CBOR::XS::as_map requires an even number of elements (did you change the array after calling as_map?)");
		454
		455	encode_uint (enc, MAJOR_MAP, (len + 1) >> 1);
		456
		457	for (i = 0; i <= len; ++i)
		458	{
		459	SV **svp = av_fetch (av, i, 0);
		460	encode_sv (enc, svp ? *svp : &PL_sv_undef);
		461	}
		462
		463	--enc->depth;
		464	}
		465
		466	ecb_inline void
		467	encode_forced (enc_t *enc, UV type, SV *sv)
		468	{
		469	switch (type)
		470	{
		471	case AS_CBOR:
		472	{
		473	STRLEN len;
		474	char *str = SvPVbyte (sv, len);
		475
		476	need (enc, len);
		477	memcpy (enc->cur, str, len);
		478	enc->cur += len;
		479	}
		480	break;
		481
		482	case AS_BYTES:
		483	{
		484	STRLEN len;
		485	char *str = SvPVbyte (sv, len);
		486	encode_strref (enc, 0, 0, str, len);
		487	}
		488	break;
		489
		490	case AS_TEXT:
		491	{
		492	STRLEN len;
		493	char *str = SvPVutf8 (sv, len);
		494	encode_strref (enc, 1, 1, str, len);
		495	}
		496	break;
		497
		498	case AS_INT: encode_int (enc, sv); break;
		499
		500	case AS_FLOAT16: encode_float16 (enc, SvNV (sv)); break;
		501	case AS_FLOAT32: encode_float32 (enc, SvNV (sv)); break;
		502	case AS_FLOAT64: encode_float64 (enc, SvNV (sv)); break;
		503
		504	case AS_MAP: encode_array_as_map (enc, sv); break;
		505
		506	default:
		507	croak ("encountered malformed CBOR::XS::Tagged object");
		508	}
		509	}
220		510
221	static void	511	static void
222	encode_av (enc_t *enc, AV *av)	512	encode_av (enc_t *enc, AV *av)
223	{	513	{
224	int i, len = av_len (av);	514	int i, len = av_len (av);
…		…
226	if (enc->depth >= enc->cbor.max_depth)	516	if (enc->depth >= enc->cbor.max_depth)
227	croak (ERR_NESTING_EXCEEDED);	517	croak (ERR_NESTING_EXCEEDED);
228		518
229	++enc->depth;	519	++enc->depth;
230		520
231	encode_uint (enc, 0x80, len + 1);	521	encode_uint (enc, MAJOR_ARRAY, len + 1);
232		522
		523	if (ecb_expect_false (SvMAGICAL (av)))
233	for (i = 0; i <= len; ++i)	524	for (i = 0; i <= len; ++i)
234	{	525	{
235	SV **svp = av_fetch (av, i, 0);	526	SV **svp = av_fetch (av, i, 0);
236	encode_sv (enc, svp ? *svp : &PL_sv_undef);	527	encode_sv (enc, svp ? *svp : &PL_sv_undef);
237	}	528	}
		529	else
		530	for (i = 0; i <= len; ++i)
		531	{
		532	SV *sv = AvARRAY (av)[i];
		533	encode_sv (enc, sv ? sv : &PL_sv_undef);
		534	}
238		535
239	--enc->depth;	536	--enc->depth;
240	}	537	}
241		538
242	static void	539	static void
…		…
250	++enc->depth;	547	++enc->depth;
251		548
252	int pairs = hv_iterinit (hv);	549	int pairs = hv_iterinit (hv);
253	int mg = SvMAGICAL (hv);	550	int mg = SvMAGICAL (hv);
254		551
255	if (mg)	552	if (ecb_expect_false (mg))
256	encode_ch (enc, 0xa0 | 31);	553	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
257	else	554	else
258	encode_uint (enc, 0xa0, pairs);	555	encode_uint (enc, MAJOR_MAP, pairs);
259		556
260	while ((he = hv_iternext (hv)))	557	while ((he = hv_iternext (hv)))
261	{	558	{
262	if (HeKLEN (he) == HEf_SVKEY)	559	if (HeKLEN (he) == HEf_SVKEY)
263	encode_sv (enc, HeSVKEY (he));	560	encode_sv (enc, HeSVKEY (he));
264	else	561	else
265	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	562	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
266		563
267	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	564	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
268	}	565	}
269		566
270	if (mg)	567	if (ecb_expect_false (mg))
271	encode_ch (enc, 0xe0 | 31);	568	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
272		569
273	--enc->depth;	570	--enc->depth;
274	}	571	}
275		572
276	// encode objects, arrays and special \0=false and \1=true values.	573	// encode objects, arrays and special \0=false and \1=true values.
277	static void	574	static void
278	encode_rv (enc_t *enc, SV *sv)	575	encode_rv (enc_t *enc, SV *sv)
279	{	576	{
280	SvGETMAGIC (sv);	577	SvGETMAGIC (sv);
281
282	if (ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING)
283	&& ecb_expect_false (SvREFCNT (sv) > 1))
284	{
285	if (!enc->shareable)
286	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
287
288	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
289
290	if (SvOK (*svp))
291	{
292	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
293	encode_uint (enc, 0x00, SvUV (*svp));
294	return;
295	}
296	else
297	{
298	sv_setuv (*svp, enc->shareable_idx);
299	++enc->shareable_idx;
300	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
301	}
302	}
303		578
304	svtype svt = SvTYPE (sv);	579	svtype svt = SvTYPE (sv);
305		580
306	if (ecb_expect_false (SvOBJECT (sv)))	581	if (ecb_expect_false (SvOBJECT (sv)))
307	{	582	{
…		…
314	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	589	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
315	? cbor_tagged_stash	590	? cbor_tagged_stash
316	: gv_stashpv ("CBOR::XS::Tagged" , 1);	591	: gv_stashpv ("CBOR::XS::Tagged" , 1);
317		592
318	HV *stash = SvSTASH (sv);	593	HV *stash = SvSTASH (sv);
319	GV *method;
320		594
321	if (stash == boolean_stash)	595	if (stash == boolean_stash)
322	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	596	{
		597	encode_bool (enc, SvIV (sv));
		598	return;
		599	}
323	else if (stash == error_stash)	600	else if (stash == error_stash)
324	encode_ch (enc, 0xe0 | 23);	601	{
		602	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		603	return;
		604	}
325	else if (stash == tagged_stash)	605	else if (stash == tagged_stash)
326	{	606	{
327	if (svt != SVt_PVAV)	607	if (svt != SVt_PVAV)
328	croak ("encountered CBOR::XS::Tagged object that isn't an array");	608	croak ("encountered CBOR::XS::Tagged object that isn't an array");
329		609
		610	switch (av_len ((AV *)sv))
		611	{
		612	case 2-1:
		613	// actually a tagged value
330	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	614	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
331	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));	615	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		616	break;
		617
		618	case 3-1:
		619	// a forced type [value, type, undef]
		620	encode_forced (enc, SvUV (*av_fetch ((AV *)sv, 1, 1)), *av_fetch ((AV *)sv, 0, 1));
		621	break;
		622
		623	default:
		624	croak ("encountered malformed CBOR::XS::Tagged object");
		625	}
		626
		627	return;
		628	}
		629	}
		630
		631	if (ecb_expect_false (SvREFCNT (sv) > 1)
		632	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		633	{
		634	if (ecb_expect_false (!enc->shareable))
		635	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		636
		637	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		638
		639	if (SvOK (*svp))
332	}	640	{
		641	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		642	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		643	return;
		644	}
		645	else
		646	{
		647	sv_setuv (*svp, enc->shareable_idx);
		648	++enc->shareable_idx;
		649	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		650	}
		651	}
		652
		653	if (ecb_expect_false (SvOBJECT (sv)))
		654	{
		655	HV *stash = SvSTASH (sv);
		656	GV *method;
		657
		658	if (enc->cbor.flags & F_FORBID_OBJECTS)
		659	croak ("encountered object '%s', but forbid_objects is enabled",
		660	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
333	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))	661	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
334	{	662	{
335	dSP;	663	dSP;
336		664
337	ENTER; SAVETMPS; PUSHMARK (SP);	665	ENTER; SAVETMPS;
		666	PUSHMARK (SP);
338	// we re-bless the reference to get overload and other niceties right	667	// we re-bless the reference to get overload and other niceties right
339	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	668	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
340		669
341	PUTBACK;	670	PUTBACK;
342	// G_SCALAR ensures that return value is 1	671	// G_SCALAR ensures that return value is 1
…		…
355	}	684	}
356	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)	685	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
357	{	686	{
358	dSP;	687	dSP;
359		688
360	ENTER; SAVETMPS; PUSHMARK (SP);	689	ENTER; SAVETMPS;
		690	PUSHMARK (SP);
361	EXTEND (SP, 2);	691	EXTEND (SP, 2);
362	// we re-bless the reference to get overload and other niceties right	692	// we re-bless the reference to get overload and other niceties right
363	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	693	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
364	PUSHs (sv_cbor);	694	PUSHs (sv_cbor);
365		695
…		…
370	// catch this surprisingly common error	700	// catch this surprisingly common error
371	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)	701	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
372	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));	702	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
373		703
374	encode_tag (enc, CBOR_TAG_PERL_OBJECT);	704	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
375	encode_uint (enc, 0x80, count + 1);	705	encode_uint (enc, MAJOR_ARRAY, count + 1);
376	encode_str (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));	706	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
377		707
378	while (count)	708	{
		709	int i;
		710
		711	for (i = 0; i < count; ++i)
379	encode_sv (enc, SP[1 - count--]);	712	encode_sv (enc, SP[i + 1 - count]);
		713
		714	SP -= count;
		715	}
380		716
381	PUTBACK;	717	PUTBACK;
382		718
383	FREETMPS; LEAVE;	719	FREETMPS; LEAVE;
384	}	720	}
…		…
402	{	738	{
403	double nv = SvNVX (sv);	739	double nv = SvNVX (sv);
404		740
405	need (enc, 9);	741	need (enc, 9);
406		742
407	if (ecb_expect_false (nv == (U32)nv))	743	if (ecb_expect_false (nv == (NV)(U32)nv))
408	encode_uint (enc, 0x00, (U32)nv);	744	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
409	//TODO: maybe I32?	745	//TODO: maybe I32?
410	else if (ecb_expect_false (nv == (float)nv))	746	else if (ecb_expect_false (nv == (float)nv))
411	{	747	encode_float32 (enc, nv);
412	uint32_t fp = ecb_float_to_binary32 (nv);
413
414	*enc->cur++ = 0xe0 | 26;
415
416	if (!ecb_big_endian ())
417	fp = ecb_bswap32 (fp);
418
419	memcpy (enc->cur, &fp, 4);
420	enc->cur += 4;
421	}
422	else	748	else
423	{	749	encode_float64 (enc, nv);
424	uint64_t fp = ecb_double_to_binary64 (nv);
425
426	*enc->cur++ = 0xe0 | 27;
427
428	if (!ecb_big_endian ())
429	fp = ecb_bswap64 (fp);
430
431	memcpy (enc->cur, &fp, 8);
432	enc->cur += 8;
433	}
434	}	750	}
435		751
436	static void	752	static void
437	encode_sv (enc_t *enc, SV *sv)	753	encode_sv (enc_t *enc, SV *sv)
438	{	754	{
…		…
440		756
441	if (SvPOKp (sv))	757	if (SvPOKp (sv))
442	{	758	{
443	STRLEN len;	759	STRLEN len;
444	char *str = SvPV (sv, len);	760	char *str = SvPV (sv, len);
445	encode_str (enc, SvUTF8 (sv), str, len);	761	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
446	}	762	}
447	else if (SvNOKp (sv))	763	else if (SvNOKp (sv))
448	encode_nv (enc, sv);	764	encode_nv (enc, sv);
449	else if (SvIOKp (sv))	765	else if (SvIOKp (sv))
450	{	766	encode_int (enc, sv);
451	if (SvIsUV (sv))
452	encode_uint (enc, 0x00, SvUVX (sv));
453	else if (SvIVX (sv) >= 0)
454	encode_uint (enc, 0x00, SvIVX (sv));
455	else
456	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
457	}
458	else if (SvROK (sv))	767	else if (SvROK (sv))
459	encode_rv (enc, SvRV (sv));	768	encode_rv (enc, SvRV (sv));
460	else if (!SvOK (sv))	769	else if (!SvOK (sv))
461	encode_ch (enc, 0xe0 | 22);	770	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
462	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	771	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
463	encode_ch (enc, 0xe0 | 23);	772	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
464	else	773	else
465	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	774	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
466	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	775	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
467	}	776	}
468		777
469	static SV *	778	static SV *
470	encode_cbor (SV *scalar, CBOR *cbor)	779	encode_cbor (SV *scalar, CBOR *cbor)
471	{	780	{
472	enc_t enc = { };	781	enc_t enc = { 0 };
473		782
474	enc.cbor = *cbor;	783	enc.cbor = *cbor;
475	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	784	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
476	enc.cur = SvPVX (enc.sv);	785	enc.cur = SvPVX (enc.sv);
477	enc.end = SvEND (enc.sv);	786	enc.end = SvEND (enc.sv);
478		787
479	SvPOK_only (enc.sv);	788	SvPOK_only (enc.sv);
		789
		790	if (cbor->flags & F_PACK_STRINGS)
		791	{
		792	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		793	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		794	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		795	}
		796
480	encode_sv (&enc, scalar);	797	encode_sv (&enc, scalar);
481		798
482	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	799	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
483	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	800	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
484		801
…		…
499	const char *err; // parse error, if != 0	816	const char *err; // parse error, if != 0
500	CBOR cbor;	817	CBOR cbor;
501	U32 depth; // recursion depth	818	U32 depth; // recursion depth
502	U32 maxdepth; // recursion depth limit	819	U32 maxdepth; // recursion depth limit
503	AV *shareable;	820	AV *shareable;
		821	AV *stringref;
		822	SV *decode_tagged;
		823	SV *err_sv; // optional sv for error, needs to be freed
504	} dec_t;	824	} dec_t;
505		825
506	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	826	// set dec->err to ERRSV
		827	ecb_cold static void
		828	err_errsv (dec_t *dec)
		829	{
		830	if (!dec->err)
		831	{
		832	dec->err_sv = newSVsv (ERRSV);
507		833
508	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	834	// chop off the trailing \n
		835	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		836	*SvEND (dec->err_sv) = 0;
509		837
		838	dec->err = SvPVutf8_nolen (dec->err_sv);
		839	}
		840	}
		841
		842	// the following functions are used to reduce code size and help the compiler to optimise
		843	ecb_cold static void
		844	err_set (dec_t *dec, const char *reason)
		845	{
		846	if (!dec->err)
		847	dec->err = reason;
		848	}
		849
		850	ecb_cold static void
		851	err_unexpected_end (dec_t *dec)
		852	{
		853	err_set (dec, "unexpected end of CBOR data");
		854	}
		855
		856	#define ERR_DO(do) SB do; goto fail; SE
		857	#define ERR(reason) ERR_DO (err_set (dec, reason))
		858	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		859
		860	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		861
510	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	862	#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED)
511	#define DEC_DEC_DEPTH --dec->depth	863	#define DEC_DEC_DEPTH --dec->depth
512		864
513	static UV	865	static UV
514	decode_uint (dec_t *dec)	866	decode_uint (dec_t *dec)
515	{	867	{
516	switch (*dec->cur & 31)	868	U8 m = *dec->cur & MINOR_MASK;
517	{	869	++dec->cur;
518	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
519	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
520	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
521	return *dec->cur++ & 31;
522		870
523	case 24:	871	if (ecb_expect_true (m < LENGTH_EXT1))
		872	return m;
		873	else if (ecb_expect_true (m == LENGTH_EXT1))
		874	{
524	WANT (2);	875	WANT (1);
525	dec->cur += 2;	876	dec->cur += 1;
526	return dec->cur[-1];	877	return dec->cur[-1];
527		878	}
528	case 25:	879	else if (ecb_expect_true (m == LENGTH_EXT2))
		880	{
529	WANT (3);	881	WANT (2);
530	dec->cur += 3;	882	dec->cur += 2;
531	return (((UV)dec->cur[-2]) << 8)	883	return (((UV)dec->cur[-2]) << 8)
532	| ((UV)dec->cur[-1]);	884	| ((UV)dec->cur[-1]);
533		885	}
534	case 26:	886	else if (ecb_expect_true (m == LENGTH_EXT4))
		887	{
535	WANT (5);	888	WANT (4);
536	dec->cur += 5;	889	dec->cur += 4;
537	return (((UV)dec->cur[-4]) << 24)	890	return (((UV)dec->cur[-4]) << 24)
538	| (((UV)dec->cur[-3]) << 16)	891	| (((UV)dec->cur[-3]) << 16)
539	| (((UV)dec->cur[-2]) << 8)	892	| (((UV)dec->cur[-2]) << 8)
540	| ((UV)dec->cur[-1]);	893	| ((UV)dec->cur[-1]);
541		894	}
542	case 27:	895	else if (ecb_expect_true (m == LENGTH_EXT8))
		896	{
543	WANT (9);	897	WANT (8);
544	dec->cur += 9;	898	dec->cur += 8;
		899
		900	return
		901	#if UVSIZE < 8
		902	0
		903	#else
545	return (((UV)dec->cur[-8]) << 56)	904	(((UV)dec->cur[-8]) << 56)
546	| (((UV)dec->cur[-7]) << 48)	905	| (((UV)dec->cur[-7]) << 48)
547	| (((UV)dec->cur[-6]) << 40)	906	| (((UV)dec->cur[-6]) << 40)
548	| (((UV)dec->cur[-5]) << 32)	907	| (((UV)dec->cur[-5]) << 32)
		908	#endif
549	| (((UV)dec->cur[-4]) << 24)	909	| (((UV)dec->cur[-4]) << 24)
550	| (((UV)dec->cur[-3]) << 16)	910	| (((UV)dec->cur[-3]) << 16)
551	| (((UV)dec->cur[-2]) << 8)	911	| (((UV)dec->cur[-2]) << 8)
552	| ((UV)dec->cur[-1]);	912	| ((UV)dec->cur[-1]);
553		913	}
554	default:	914	else
555	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	915	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
556	}
557		916
558	fail:	917	fail:
559	return 0;	918	return 0;
560	}	919	}
561		920
…		…
566	{	925	{
567	AV *av = newAV ();	926	AV *av = newAV ();
568		927
569	DEC_INC_DEPTH;	928	DEC_INC_DEPTH;
570		929
571	if ((*dec->cur & 31) == 31)	930	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
572	{	931	{
573	++dec->cur;	932	++dec->cur;
574		933
575	for (;;)	934	for (;;)
576	{	935	{
577	WANT (1);	936	WANT (1);
578		937
579	if (*dec->cur == (0xe0 | 31))	938	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
580	{	939	{
581	++dec->cur;	940	++dec->cur;
582	break;	941	break;
583	}	942	}
584		943
585	av_push (av, decode_sv (dec));	944	av_push (av, decode_sv (dec));
586	}	945	}
587	}	946	}
588	else	947	else
589	{	948	{
590	int i, len = decode_uint (dec);	949	UV i, len = decode_uint (dec);
591		950
		951	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
592	av_fill (av, len - 1);	952	av_fill (av, len - 1);
593		953
594	for (i = 0; i < len; ++i)	954	for (i = 0; i < len; ++i)
595	AvARRAY (av)[i] = decode_sv (dec);	955	AvARRAY (av)[i] = decode_sv (dec);
596	}	956	}
597		957
598	DEC_DEC_DEPTH;	958	DEC_DEC_DEPTH;
599	return newRV_noinc ((SV *)av);	959	return newRV_noinc ((SV *)av);
600		960
601	fail:	961	fail:
602	SvREFCNT_dec (av);	962	SvREFCNT_dec_NN (av);
603	DEC_DEC_DEPTH;	963	DEC_DEC_DEPTH;
604	return &PL_sv_undef;	964	return &PL_sv_undef;
605	}	965	}
606		966
607	static void	967	static void
608	decode_he (dec_t *dec, HV *hv)	968	decode_he (dec_t *dec, HV *hv)
609	{	969	{
610	// for speed reasons, we specialcase single-string	970	// for speed reasons, we specialcase single-string
611	// byte or utf-8 strings as keys.	971	// byte or utf-8 strings as keys, but only when !stringref
612		972
613	if (*dec->cur >= 0x40 && *dec->cur <= 0x40 + 27)	973	if (ecb_expect_true (!dec->stringref))
		974	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
614	{	975	{
615	I32 len = decode_uint (dec);	976	STRLEN len = decode_uint (dec);
616	char *key = (char *)dec->cur;	977	char *key = (char *)dec->cur;
617		978
		979	WANT (len);
618	dec->cur += len;	980	dec->cur += len;
619		981
620	hv_store (hv, key, len, decode_sv (dec), 0);	982	hv_store (hv, key, len, decode_sv (dec), 0);
		983
		984	return;
621	}	985	}
622	else if (*dec->cur >= 0x60 && *dec->cur <= 0x60 + 27)	986	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
623	{	987	{
624	I32 len = decode_uint (dec);	988	STRLEN len = decode_uint (dec);
625	char *key = (char *)dec->cur;	989	char *key = (char *)dec->cur;
626		990
		991	WANT (len);
627	dec->cur += len;	992	dec->cur += len;
628		993
		994	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		995	if (!cbor_is_utf8_string ((U8 *)key, len))
		996	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		997
629	hv_store (hv, key, -len, decode_sv (dec), 0);	998	hv_store (hv, key, -len, decode_sv (dec), 0);
		999
		1000	return;
630	}	1001	}
631	else	1002
632	{
633	SV *k = decode_sv (dec);	1003	SV *k = decode_sv (dec);
634	SV *v = decode_sv (dec);	1004	SV *v = decode_sv (dec);
635		1005
		1006	// we leak memory if uncaught exceptions are thrown by random magical
		1007	// methods, and this is hopefully the only place where it can happen,
		1008	// so if there is a chance of an exception, take the very slow path.
		1009	// since catching exceptions is "undocumented/internal/forbidden" by
		1010	// the new p5p powers, we need to call out to a perl function :/
		1011	if (ecb_expect_false (SvAMAGIC (k)))
		1012	{
		1013	dSP;
		1014
		1015	ENTER; SAVETMPS;
		1016	PUSHMARK (SP);
		1017	EXTEND (SP, 3);
		1018	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		1019	PUSHs (sv_2mortal (k));
		1020	PUSHs (sv_2mortal (v));
		1021
		1022	PUTBACK;
		1023	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		1024	SPAGAIN;
		1025
		1026	FREETMPS; LEAVE;
		1027
		1028	if (SvTRUE (ERRSV))
		1029	ERR_ERRSV;
		1030
		1031	return;
		1032	}
		1033
636	hv_store_ent (hv, k, v, 0);	1034	hv_store_ent (hv, k, v, 0);
637	SvREFCNT_dec (k);	1035	SvREFCNT_dec_NN (k);
638	}	1036
		1037	fail:
		1038	;
639	}	1039	}
640		1040
641	static SV *	1041	static SV *
642	decode_hv (dec_t *dec)	1042	decode_hv (dec_t *dec)
643	{	1043	{
644	HV *hv = newHV ();	1044	HV *hv = newHV ();
645		1045
646	DEC_INC_DEPTH;	1046	DEC_INC_DEPTH;
647		1047
648	if ((*dec->cur & 31) == 31)	1048	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
649	{	1049	{
650	++dec->cur;	1050	++dec->cur;
651		1051
652	for (;;)	1052	for (;;)
653	{	1053	{
654	WANT (1);	1054	WANT (1);
655		1055
656	if (*dec->cur == (0xe0 | 31))	1056	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
657	{	1057	{
658	++dec->cur;	1058	++dec->cur;
659	break;	1059	break;
660	}	1060	}
661		1061
662	decode_he (dec, hv);	1062	decode_he (dec, hv);
663	}	1063	}
664	}	1064	}
665	else	1065	else
666	{	1066	{
667	int pairs = decode_uint (dec);	1067	UV pairs = decode_uint (dec);
		1068
		1069	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
668		1070
669	while (pairs--)	1071	while (pairs--)
670	decode_he (dec, hv);	1072	decode_he (dec, hv);
671	}	1073	}
672		1074
673	DEC_DEC_DEPTH;	1075	DEC_DEC_DEPTH;
674	return newRV_noinc ((SV *)hv);	1076	return newRV_noinc ((SV *)hv);
675		1077
676	fail:	1078	fail:
677	SvREFCNT_dec (hv);	1079	SvREFCNT_dec_NN (hv);
678	DEC_DEC_DEPTH;	1080	DEC_DEC_DEPTH;
679	return &PL_sv_undef;	1081	return &PL_sv_undef;
680	}	1082	}
681		1083
682	static SV *	1084	static SV *
683	decode_str (dec_t *dec, int utf8)	1085	decode_str (dec_t *dec, int utf8)
684	{	1086	{
685	SV *sv = 0;	1087	SV *sv = 0;
686		1088
687	if ((*dec->cur & 31) == 31)	1089	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
688	{	1090	{
		1091	// indefinite length strings
689	++dec->cur;	1092	++dec->cur;
690		1093
		1094	U8 major = *dec->cur & MAJOR_MISC;
		1095
691	sv = newSVpvn ("", 0);	1096	sv = newSVpvn ("", 0);
692		1097
693	// not very fast, and certainly not robust against illegal input
694	for (;;)	1098	for (;;)
695	{	1099	{
696	WANT (1);	1100	WANT (1);
697		1101
698	if (*dec->cur == (0xe0 | 31))	1102	if ((*dec->cur - major) > LENGTH_EXT8)
		1103	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
699	{	1104	{
700	++dec->cur;	1105	++dec->cur;
701	break;	1106	break;
702	}	1107	}
		1108	else
		1109	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
703		1110
704	sv_catsv (sv, decode_sv (dec));	1111	STRLEN len = decode_uint (dec);
		1112
		1113	WANT (len);
		1114	sv_catpvn (sv, dec->cur, len);
		1115	dec->cur += len;
705	}	1116	}
706	}	1117	}
707	else	1118	else
708	{	1119	{
709	STRLEN len = decode_uint (dec);	1120	STRLEN len = decode_uint (dec);
710		1121
711	WANT (len);	1122	WANT (len);
712	sv = newSVpvn (dec->cur, len);	1123	sv = newSVpvn (dec->cur, len);
713	dec->cur += len;	1124	dec->cur += len;
		1125
		1126	if (ecb_expect_false (dec->stringref)
		1127	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		1128	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
714	}	1129	}
715		1130
716	if (utf8)	1131	if (utf8)
		1132	{
		1133	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		1134	if (!cbor_is_utf8_string (SvPVX (sv), SvCUR (sv)))
		1135	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		1136
717	SvUTF8_on (sv);	1137	SvUTF8_on (sv);
		1138	}
718		1139
719	return sv;	1140	return sv;
720		1141
721	fail:	1142	fail:
722	SvREFCNT_dec (sv);	1143	SvREFCNT_dec (sv);
…		…
732	WANT (1);	1153	WANT (1);
733		1154
734	switch (tag)	1155	switch (tag)
735	{	1156	{
736	case CBOR_TAG_MAGIC:	1157	case CBOR_TAG_MAGIC:
737	return decode_sv (dec);	1158	sv = decode_sv (dec);
		1159	break;
738		1160
739	case CBOR_TAG_INDIRECTION:	1161	case CBOR_TAG_INDIRECTION:
740	return newRV_noinc (decode_sv (dec));	1162	sv = newRV_noinc (decode_sv (dec));
		1163	break;
		1164
		1165	case CBOR_TAG_STRINGREF_NAMESPACE:
		1166	{
		1167	// do not use SAVETMPS/FREETMPS, as these will
		1168	// erase mortalised caches, e.g. "shareable"
		1169	ENTER;
		1170
		1171	SAVESPTR (dec->stringref);
		1172	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1173
		1174	sv = decode_sv (dec);
		1175
		1176	LEAVE;
		1177	}
		1178	break;
		1179
		1180	case CBOR_TAG_STRINGREF:
		1181	{
		1182	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1183	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1184
		1185	UV idx = decode_uint (dec);
		1186
		1187	if (!dec->stringref || idx >= (UV)(1 + AvFILLp (dec->stringref)))
		1188	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1189
		1190	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1191	}
		1192	break;
741		1193
742	case CBOR_TAG_VALUE_SHAREABLE:	1194	case CBOR_TAG_VALUE_SHAREABLE:
743	{	1195	{
744	if (ecb_expect_false (!dec->shareable))	1196	if (ecb_expect_false (!dec->shareable))
745	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());	1197	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
746		1198
		1199	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1200	{
747	sv = newSV (0);	1201	sv = newSV (0);
748	av_push (dec->shareable, SvREFCNT_inc_NN (sv));	1202	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
749		1203
750	SV *osv = decode_sv (dec);	1204	SV *osv = decode_sv (dec);
751	sv_setsv (sv, osv);	1205	sv_setsv (sv, osv);
752	SvREFCNT_dec_NN (osv);	1206	SvREFCNT_dec_NN (osv);
753	}	1207	}
754		1208	else
755	return sv;	1209	{
		1210	av_push (dec->shareable, &PL_sv_undef);
		1211	int idx = AvFILLp (dec->shareable);
		1212	sv = decode_sv (dec);
		1213	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1214	}
		1215	}
		1216	break;
756		1217
757	case CBOR_TAG_VALUE_SHAREDREF:	1218	case CBOR_TAG_VALUE_SHAREDREF:
758	{	1219	{
759	if ((*dec->cur >> 5) != 0)	1220	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
760	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");	1221	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
761		1222
762	UV idx = decode_uint (dec);	1223	UV idx = decode_uint (dec);
763		1224
764	if (!dec->shareable || idx > AvFILLp (dec->shareable))	1225	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
765	ERR ("corrupted CBOR data (sharedref index out of bounds)");	1226	ERR ("corrupted CBOR data (sharedref index out of bounds)");
766		1227
767	return SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);	1228	sv = newRV_inc (AvARRAY (dec->shareable)[idx]);
		1229
		1230	if (sv == &PL_sv_undef)
		1231	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
768	}	1232	}
		1233	break;
769		1234
770	case CBOR_TAG_PERL_OBJECT:	1235	case CBOR_TAG_PERL_OBJECT:
771	{	1236	{
		1237	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1238	goto filter;
		1239
772	sv = decode_sv (dec);	1240	sv = decode_sv (dec);
773		1241
774	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)	1242	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
775	ERR ("corrupted CBOR data (non-array perl object)");	1243	ERR ("corrupted CBOR data (non-array perl object)");
776		1244
…		…
786	if (!method)	1254	if (!method)
787	ERR ("cannot decode perl-object (package does not have a THAW method)");	1255	ERR ("cannot decode perl-object (package does not have a THAW method)");
788		1256
789	dSP;	1257	dSP;
790		1258
791	ENTER; SAVETMPS; PUSHMARK (SP);	1259	ENTER; SAVETMPS;
		1260	PUSHMARK (SP);
792	EXTEND (SP, len + 1);	1261	EXTEND (SP, len + 1);
793	// we re-bless the reference to get overload and other niceties right	1262	// we re-bless the reference to get overload and other niceties right
794	PUSHs (*av_fetch (av, 0, 1));	1263	PUSHs (*av_fetch (av, 0, 1));
795	PUSHs (sv_cbor);	1264	PUSHs (sv_cbor);
796		1265
…		…
804	SPAGAIN;	1273	SPAGAIN;
805		1274
806	if (SvTRUE (ERRSV))	1275	if (SvTRUE (ERRSV))
807	{	1276	{
808	FREETMPS; LEAVE;	1277	FREETMPS; LEAVE;
809	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));	1278	ERR_ERRSV;
810	}	1279	}
811		1280
812	SvREFCNT_dec (sv);	1281	SvREFCNT_dec_NN (sv);
813	sv = SvREFCNT_inc (POPs);	1282	sv = SvREFCNT_inc (POPs);
814		1283
815	PUTBACK;	1284	PUTBACK;
816		1285
817	FREETMPS; LEAVE;	1286	FREETMPS; LEAVE;
818
819	return sv;
820	}	1287	}
		1288	break;
821		1289
822	default:	1290	default:
		1291	filter:
823	{	1292	{
		1293	SV *tag_sv = newSVuv (tag);
		1294
824	sv = decode_sv (dec);	1295	sv = decode_sv (dec);
825		1296
		1297	dSP;
		1298	ENTER; SAVETMPS;
		1299	PUSHMARK (SP);
		1300	EXTEND (SP, 2);
		1301	PUSHs (tag_sv);
		1302	PUSHs (sv);
		1303
		1304	PUTBACK;
		1305	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1306	SPAGAIN;
		1307
		1308	if (SvTRUE (ERRSV))
		1309	{
		1310	SvREFCNT_dec_NN (tag_sv);
		1311	FREETMPS; LEAVE;
		1312	ERR_ERRSV;
		1313	}
		1314
		1315	if (count)
		1316	{
		1317	SvREFCNT_dec_NN (tag_sv);
		1318	SvREFCNT_dec_NN (sv);
		1319	sv = SvREFCNT_inc_NN (TOPs);
		1320	SP -= count;
		1321	}
		1322	else
		1323	{
826	AV *av = newAV ();	1324	AV *av = newAV ();
827	av_push (av, newSVuv (tag));	1325	av_push (av, tag_sv);
828	av_push (av, sv);	1326	av_push (av, sv);
829		1327
830	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	1328	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
831	? cbor_tagged_stash	1329	? cbor_tagged_stash
832	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1330	: gv_stashpv ("CBOR::XS::Tagged" , 1);
833
834	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);	1331	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
835	}	1332	}
		1333
		1334	PUTBACK;
		1335
		1336	FREETMPS; LEAVE;
		1337	}
		1338	break;
836	}	1339	}
		1340
		1341	return sv;
837		1342
838	fail:	1343	fail:
839	SvREFCNT_dec (sv);	1344	SvREFCNT_dec (sv);
840	return &PL_sv_undef;	1345	return &PL_sv_undef;
841	}	1346	}
…		…
843	static SV *	1348	static SV *
844	decode_sv (dec_t *dec)	1349	decode_sv (dec_t *dec)
845	{	1350	{
846	WANT (1);	1351	WANT (1);
847		1352
848	switch (*dec->cur >> 5)	1353	switch (*dec->cur >> MAJOR_SHIFT)
849	{	1354	{
850	case 0: // unsigned int	1355	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
851	return newSVuv (decode_uint (dec));	1356	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
852	case 1: // negative int	1357	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
853	return newSViv (-1 - (IV)decode_uint (dec));	1358	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
854	case 2: // octet string	1359	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
855	return decode_str (dec, 0);	1360	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
856	case 3: // utf-8 string	1361	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
857	return decode_str (dec, 1);	1362
858	case 4: // array	1363	case MAJOR_MISC >> MAJOR_SHIFT:
859	return decode_av (dec);
860	case 5: // map
861	return decode_hv (dec);
862	case 6: // tag
863	return decode_tagged (dec);
864	case 7: // misc
865	switch (*dec->cur++ & 31)	1364	switch (*dec->cur++ & MINOR_MASK)
866	{	1365	{
867	case 20:	1366	case SIMPLE_FALSE:
868	#if CBOR_SLOW	1367	#if CBOR_SLOW
869	types_false = get_bool ("Types::Serialiser::false");	1368	types_false = get_bool ("Types::Serialiser::false");
870	#endif	1369	#endif
871	return newSVsv (types_false);	1370	return newSVsv (types_false);
872	case 21:	1371	case SIMPLE_TRUE:
873	#if CBOR_SLOW	1372	#if CBOR_SLOW
874	types_true = get_bool ("Types::Serialiser::true");	1373	types_true = get_bool ("Types::Serialiser::true");
875	#endif	1374	#endif
876	return newSVsv (types_true);	1375	return newSVsv (types_true);
877	case 22:	1376	case SIMPLE_NULL:
878	return newSVsv (&PL_sv_undef);	1377	return newSVsv (&PL_sv_undef);
879	case 23:	1378	case SIMPLE_UNDEF:
880	#if CBOR_SLOW	1379	#if CBOR_SLOW
881	types_error = get_bool ("Types::Serialiser::error");	1380	types_error = get_bool ("Types::Serialiser::error");
882	#endif	1381	#endif
883	return newSVsv (types_error);	1382	return newSVsv (types_error);
884		1383
885	case 25:	1384	case MISC_FLOAT16:
886	{	1385	{
887	WANT (2);	1386	WANT (2);
888		1387
889	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1388	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
890	dec->cur += 2;	1389	dec->cur += 2;
891		1390
892	return newSVnv (ecb_binary16_to_float (fp));	1391	return newSVnv (ecb_binary16_to_float (fp));
893	}	1392	}
894		1393
895	case 26:	1394	case MISC_FLOAT32:
896	{	1395	{
897	uint32_t fp;	1396	uint32_t fp;
898	WANT (4);	1397	WANT (4);
899	memcpy (&fp, dec->cur, 4);	1398	memcpy (&fp, dec->cur, 4);
900	dec->cur += 4;	1399	dec->cur += 4;
…		…
903	fp = ecb_bswap32 (fp);	1402	fp = ecb_bswap32 (fp);
904		1403
905	return newSVnv (ecb_binary32_to_float (fp));	1404	return newSVnv (ecb_binary32_to_float (fp));
906	}	1405	}
907		1406
908	case 27:	1407	case MISC_FLOAT64:
909	{	1408	{
910	uint64_t fp;	1409	uint64_t fp;
911	WANT (8);	1410	WANT (8);
912	memcpy (&fp, dec->cur, 8);	1411	memcpy (&fp, dec->cur, 8);
913	dec->cur += 8;	1412	dec->cur += 8;
…		…
916	fp = ecb_bswap64 (fp);	1415	fp = ecb_bswap64 (fp);
917		1416
918	return newSVnv (ecb_binary64_to_double (fp));	1417	return newSVnv (ecb_binary64_to_double (fp));
919	}	1418	}
920		1419
921	// 0..19 unassigned	1420	// 0..19 unassigned simple
922	// 24 reserved + unassigned (reserved values are not encodable)	1421	// 24 reserved + unassigned simple (reserved values are not encodable)
		1422	// 28-30 unassigned misc
		1423	// 31 break code
923	default:	1424	default:
924	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1425	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
925	}	1426	}
926		1427
927	break;	1428	break;
928	}	1429	}
929		1430
…		…
932	}	1433	}
933		1434
934	static SV *	1435	static SV *
935	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1436	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
936	{	1437	{
937	dec_t dec = { };	1438	dec_t dec = { 0 };
938	SV *sv;	1439	SV *sv;
939	STRLEN len;	1440	STRLEN len;
940	char *data = SvPVbyte (string, len);	1441	char *data = SvPVbyte (string, len);
941		1442
942	if (len > cbor->max_size && cbor->max_size)	1443	if (len > cbor->max_size && cbor->max_size)
…		…
956	if (dec.cur != dec.end && !dec.err)	1457	if (dec.cur != dec.end && !dec.err)
957	dec.err = "garbage after CBOR object";	1458	dec.err = "garbage after CBOR object";
958		1459
959	if (dec.err)	1460	if (dec.err)
960	{	1461	{
		1462	if (dec.shareable)
		1463	{
		1464	// need to break cyclic links, which would all be in shareable
		1465	int i;
		1466	SV **svp;
		1467
		1468	for (i = av_len (dec.shareable) + 1; i--; )
		1469	if ((svp = av_fetch (dec.shareable, i, 0)))
		1470	sv_setsv (*svp, &PL_sv_undef);
		1471	}
		1472
961	SvREFCNT_dec (sv);	1473	SvREFCNT_dec_NN (sv);
		1474
		1475	if (dec.err_sv)
		1476	sv_2mortal (dec.err_sv);
		1477
962	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);	1478	croak ("%s, at offset %ld (octet 0x%02x)", dec.err, (long)(dec.cur - (U8 *)data), (int)(uint8_t)*dec.cur);
963	}	1479	}
964		1480
965	sv = sv_2mortal (sv);	1481	sv = sv_2mortal (sv);
966		1482
967	return sv;	1483	return sv;
968	}	1484	}
969		1485
		1486	/////////////////////////////////////////////////////////////////////////////
		1487	// incremental parser
		1488
		1489	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1490
		1491	// returns 0 for notyet, 1 for success or error
		1492	static int
		1493	incr_parse (CBOR *self, SV *cborstr)
		1494	{
		1495	STRLEN cur;
		1496	SvPV (cborstr, cur);
		1497
		1498	while (ecb_expect_true (self->incr_need <= cur))
		1499	{
		1500	// table of integer count bytes
		1501	static I8 incr_len[MINOR_MASK + 1] = {
		1502	0, 0, 0, 0, 0, 0, 0, 0,
		1503	0, 0, 0, 0, 0, 0, 0, 0,
		1504	0, 0, 0, 0, 0, 0, 0, 0,
		1505	1, 2, 4, 8,-1,-1,-1,-2
		1506	};
		1507
		1508	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1509	U8 m = *p & MINOR_MASK;
		1510	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1511	I8 ilen = incr_len[m];
		1512
		1513	self->incr_need = self->incr_pos + 1;
		1514
		1515	if (ecb_expect_false (ilen < 0))
		1516	{
		1517	if (m != MINOR_INDEF)
		1518	return 1; // error
		1519
		1520	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1521	{
		1522	if (count >= 0)
		1523	return 1; // error
		1524
		1525	count = 1;
		1526	}
		1527	else
		1528	{
		1529	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1530	count = -1;
		1531	}
		1532	}
		1533	else
		1534	{
		1535	self->incr_need += ilen;
		1536	if (ecb_expect_false (self->incr_need > cur))
		1537	return 0;
		1538
		1539	int major = *p >> MAJOR_SHIFT;
		1540
		1541	switch (major)
		1542	{
		1543	case MAJOR_TAG >> MAJOR_SHIFT:
		1544	++count; // tags merely prefix another value
		1545	break;
		1546
		1547	case MAJOR_BYTES >> MAJOR_SHIFT:
		1548	case MAJOR_TEXT >> MAJOR_SHIFT:
		1549	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1550	case MAJOR_MAP >> MAJOR_SHIFT:
		1551	{
		1552	UV len;
		1553
		1554	if (ecb_expect_false (ilen))
		1555	{
		1556	len = 0;
		1557
		1558	do {
		1559	len = (len << 8) | *++p;
		1560	} while (--ilen);
		1561	}
		1562	else
		1563	len = m;
		1564
		1565	switch (major)
		1566	{
		1567	case MAJOR_BYTES >> MAJOR_SHIFT:
		1568	case MAJOR_TEXT >> MAJOR_SHIFT:
		1569	self->incr_need += len;
		1570	if (ecb_expect_false (self->incr_need > cur))
		1571	return 0;
		1572
		1573	break;
		1574
		1575	case MAJOR_MAP >> MAJOR_SHIFT:
		1576	len <<= 1;
		1577	/* FALLTHROUGH */
		1578	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1579	if (len)
		1580	{
		1581	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1582	count = len + 1;
		1583	}
		1584	break;
		1585	}
		1586	}
		1587	}
		1588	}
		1589
		1590	self->incr_pos = self->incr_need;
		1591
		1592	if (count > 0)
		1593	{
		1594	while (!--count)
		1595	{
		1596	if (!AvFILLp (self->incr_count))
		1597	return 1; // done
		1598
		1599	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1600	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1601	}
		1602
		1603	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1604	}
		1605	}
		1606
		1607	return 0;
		1608	}
		1609
		1610
970	/////////////////////////////////////////////////////////////////////////////	1611	/////////////////////////////////////////////////////////////////////////////
971	// XS interface functions	1612	// XS interface functions
972		1613
973	MODULE = CBOR::XS PACKAGE = CBOR::XS	1614	MODULE = CBOR::XS PACKAGE = CBOR::XS
974		1615
…		…
982		1623
983	types_true = get_bool ("Types::Serialiser::true" );	1624	types_true = get_bool ("Types::Serialiser::true" );
984	types_false = get_bool ("Types::Serialiser::false");	1625	types_false = get_bool ("Types::Serialiser::false");
985	types_error = get_bool ("Types::Serialiser::error");	1626	types_error = get_bool ("Types::Serialiser::error");
986		1627
		1628	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1629
987	sv_cbor = newSVpv ("CBOR", 0);	1630	sv_cbor = newSVpv ("CBOR", 0);
988	SvREADONLY_on (sv_cbor);	1631	SvREADONLY_on (sv_cbor);
		1632
		1633	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
989	}	1634	}
990		1635
991	PROTOTYPES: DISABLE	1636	PROTOTYPES: DISABLE
992		1637
993	void CLONE (...)	1638	void CLONE (...)
…		…
1012	void shrink (CBOR *self, int enable = 1)	1657	void shrink (CBOR *self, int enable = 1)
1013	ALIAS:	1658	ALIAS:
1014	shrink = F_SHRINK	1659	shrink = F_SHRINK
1015	allow_unknown = F_ALLOW_UNKNOWN	1660	allow_unknown = F_ALLOW_UNKNOWN
1016	allow_sharing = F_ALLOW_SHARING	1661	allow_sharing = F_ALLOW_SHARING
1017	dedup_keys = F_DEDUP_KEYS	1662	allow_cycles = F_ALLOW_CYCLES
		1663	forbid_objects = F_FORBID_OBJECTS
1018	dedup_strings = F_DEDUP_STRINGS	1664	pack_strings = F_PACK_STRINGS
		1665	text_keys = F_TEXT_KEYS
		1666	text_strings = F_TEXT_STRINGS
		1667	validate_utf8 = F_VALIDATE_UTF8
1019	PPCODE:	1668	PPCODE:
1020	{	1669	{
1021	if (enable)	1670	if (enable)
1022	self->flags |= ix;	1671	self->flags |= ix;
1023	else	1672	else
…		…
1029	void get_shrink (CBOR *self)	1678	void get_shrink (CBOR *self)
1030	ALIAS:	1679	ALIAS:
1031	get_shrink = F_SHRINK	1680	get_shrink = F_SHRINK
1032	get_allow_unknown = F_ALLOW_UNKNOWN	1681	get_allow_unknown = F_ALLOW_UNKNOWN
1033	get_allow_sharing = F_ALLOW_SHARING	1682	get_allow_sharing = F_ALLOW_SHARING
1034	get_dedup_keys = F_DEDUP_KEYS	1683	get_allow_cycles = F_ALLOW_CYCLES
		1684	get_forbid_objects = F_FORBID_OBJECTS
1035	get_dedup_strings = F_DEDUP_STRINGS	1685	get_pack_strings = F_PACK_STRINGS
		1686	get_text_keys = F_TEXT_KEYS
		1687	get_text_strings = F_TEXT_STRINGS
		1688	get_validate_utf8 = F_VALIDATE_UTF8
1036	PPCODE:	1689	PPCODE:
1037	XPUSHs (boolSV (self->flags & ix));	1690	XPUSHs (boolSV (self->flags & ix));
1038		1691
1039	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1692	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1040	PPCODE:	1693	PPCODE:
…		…
1053	XPUSHs (ST (0));	1706	XPUSHs (ST (0));
1054		1707
1055	int get_max_size (CBOR *self)	1708	int get_max_size (CBOR *self)
1056	CODE:	1709	CODE:
1057	RETVAL = self->max_size;	1710	RETVAL = self->max_size;
		1711	OUTPUT:
		1712	RETVAL
		1713
		1714	void filter (CBOR *self, SV *filter = 0)
		1715	PPCODE:
		1716	SvREFCNT_dec (self->filter);
		1717	self->filter = filter ? newSVsv (filter) : filter;
		1718	XPUSHs (ST (0));
		1719
		1720	SV *get_filter (CBOR *self)
		1721	CODE:
		1722	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1058	OUTPUT:	1723	OUTPUT:
1059	RETVAL	1724	RETVAL
1060		1725
1061	void encode (CBOR *self, SV *scalar)	1726	void encode (CBOR *self, SV *scalar)
1062	PPCODE:	1727	PPCODE:
…		…
1077	EXTEND (SP, 2);	1742	EXTEND (SP, 2);
1078	PUSHs (sv);	1743	PUSHs (sv);
1079	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1744	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1080	}	1745	}
1081		1746
		1747	void incr_parse (CBOR *self, SV *cborstr)
		1748	ALIAS:
		1749	incr_parse_multiple = 1
		1750	PPCODE:
		1751	{
		1752	if (SvUTF8 (cborstr))
		1753	sv_utf8_downgrade (cborstr, 0);
		1754
		1755	if (!self->incr_count)
		1756	{
		1757	self->incr_count = newAV ();
		1758	self->incr_pos = 0;
		1759	self->incr_need = 1;
		1760
		1761	av_push (self->incr_count, newSViv (1));
		1762	}
		1763
		1764	do
		1765	{
		1766	if (!incr_parse (self, cborstr))
		1767	{
		1768	if (self->incr_need > self->max_size && self->max_size)
		1769	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1770	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1771
		1772	break;
		1773	}
		1774
		1775	SV *sv;
		1776	char *offset;
		1777
		1778	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1779	XPUSHs (sv);
		1780
		1781	sv_chop (cborstr, offset);
		1782
		1783	av_clear (self->incr_count);
		1784	av_push (self->incr_count, newSViv (1));
		1785
		1786	self->incr_pos = 0;
		1787	self->incr_need = self->incr_pos + 1;
		1788	}
		1789	while (ix);
		1790	}
		1791
		1792	void incr_reset (CBOR *self)
		1793	CODE:
		1794	{
		1795	SvREFCNT_dec (self->incr_count);
		1796	self->incr_count = 0;
		1797	}
		1798
		1799	void DESTROY (CBOR *self)
		1800	PPCODE:
		1801	cbor_free (self);
		1802
1082	PROTOTYPES: ENABLE	1803	PROTOTYPES: ENABLE
1083		1804
1084	void encode_cbor (SV *scalar)	1805	void encode_cbor (SV *scalar)
		1806	ALIAS:
		1807	encode_cbor = 0
		1808	encode_cbor_sharing = F_ALLOW_SHARING
1085	PPCODE:	1809	PPCODE:
1086	{	1810	{
1087	CBOR cbor;	1811	CBOR cbor;
1088	cbor_init (&cbor);	1812	cbor_init (&cbor);
		1813	cbor.flags |= ix;
1089	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1814	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1090	XPUSHs (scalar);	1815	XPUSHs (scalar);
1091	}	1816	}
1092		1817
1093	void decode_cbor (SV *cborstr)	1818	void decode_cbor (SV *cborstr)
…		…
1097	cbor_init (&cbor);	1822	cbor_init (&cbor);
1098	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1823	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1099	XPUSHs (cborstr);	1824	XPUSHs (cborstr);
1100	}	1825	}
1101		1826
		1827	#ifdef __AFL_COMPILER
		1828
		1829	void
		1830	afl_init ()
		1831	CODE:
		1832	__AFL_INIT ();
		1833
		1834	int
		1835	afl_loop (unsigned int count = 10000)
		1836	CODE:
		1837	RETVAL = __AFL_LOOP (count);
		1838	OUTPUT:
		1839	RETVAL
		1840
		1841	#endif
		1842

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