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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.18 by root, Wed Nov 20 01:09:46 2013 UTC vs.
Revision 1.71 by root, Fri Mar 19 17:30:27 2021 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
		74	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
29	CBOR_TAG_PERL_OBJECT = 24, // http://cbor.schmorp.de/perl-object	75	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
30	CBOR_TAG_GENERIC_OBJECT = 25, // http://cbor.schmorp.de/generic-object	76	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
31	CBOR_TAG_VALUE_SHARABLE = 26, // http://cbor.schmorp.de/value-sharing	77	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
32	CBOR_TAG_VALUE_SHAREDREF = 27, // http://cbor.schmorp.de/value-sharing	78	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
33	CBOR_TAG_STRINGREF_NAMESPACE = 65537, // http://cbor.schmorp.de/stringref	79	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	80	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
36		81
37	// rfc7049	82	// rfc7049
38	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	83	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
39	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	84	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
40	CBOR_TAG_POS_BIGNUM = 2, // byte string	85	CBOR_TAG_POS_BIGNUM = 2, // byte string
41	CBOR_TAG_NEG_BIGNUM = 3, // byte string	86	CBOR_TAG_NEG_BIGNUM = 3, // byte string
42	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	87	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
43	CBOR_TAG_BIGFLOAT = 5, // array	88	CBOR_TAG_BIGFLOAT = 5, // array
44		89
45	CBOR_TAG_CONV_B64U = 21, // base64url, any	90	CBOR_TAG_CONV_B64U = 21, // base64url, any
46	CBOR_TAG_CONV_B64 = 22, // base64, any	91	CBOR_TAG_CONV_B64 = 22, // base64, any
47	CBOR_TAG_CONV_HEX = 23, // base16, any	92	CBOR_TAG_CONV_HEX = 23, // base16, any
48	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	93	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
49		94
50	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	95	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
51	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	96	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
52	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	97	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
53	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	98	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
54	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	99	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
55		100
56	CBOR_TAG_MAGIC = 55799 // self-describe cbor	101	CBOR_TAG_MAGIC = 55799, // self-describe cbor
57	};	102	};
58		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	AS_MAP = 7,
		115	// possibly future enhancements: (generic) float, (generic) string
		116	};
		117
59	#define F_SHRINK 0x00000001UL	118	#define F_SHRINK 0x00000001UL
60	#define F_ALLOW_UNKNOWN 0x00000002UL	119	#define F_ALLOW_UNKNOWN 0x00000002UL
61	#define F_ALLOW_SHARING 0x00000004UL //TODO	120	#define F_ALLOW_SHARING 0x00000004UL
		121	#define F_ALLOW_CYCLES 0x00000008UL
		122	#define F_FORBID_OBJECTS 0x00000010UL
62	#define F_DEDUP_STRINGS 0x00000008UL //TODO	123	#define F_PACK_STRINGS 0x00000020UL
63	#define F_DEDUP_KEYS 0x00000010UL //TODO	124	#define F_TEXT_KEYS 0x00000040UL
		125	#define F_TEXT_STRINGS 0x00000080UL
		126	#define F_VALIDATE_UTF8 0x00000100UL
64		127
65	#define INIT_SIZE 32 // initial scalar size to be allocated	128	#define INIT_SIZE 32 // initial scalar size to be allocated
66		129
67	#define SB do {	130	#define SB do {
68	#define SE } while (0)	131	#define SE } while (0)
…		…
80	# define CBOR_SLOW 0	143	# define CBOR_SLOW 0
81	# define CBOR_STASH cbor_stash	144	# define CBOR_STASH cbor_stash
82	#endif	145	#endif
83		146
84	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::	147	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;	148	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
86		149
87	typedef struct {	150	typedef struct {
88	U32 flags;	151	U32 flags;
89	U32 max_depth;	152	U32 max_depth;
90	STRLEN max_size;	153	STRLEN max_size;
		154	SV *filter;
		155
		156	// for the incremental parser
		157	STRLEN incr_pos; // the current offset into the text
		158	STRLEN incr_need; // minimum bytes needed to decode
		159	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
91	} CBOR;	160	} CBOR;
92		161
93	ecb_inline void	162	ecb_inline void
94	cbor_init (CBOR *cbor)	163	cbor_init (CBOR *cbor)
95	{	164	{
96	Zero (cbor, 1, CBOR);	165	Zero (cbor, 1, CBOR);
97	cbor->max_depth = 512;	166	cbor->max_depth = 512;
		167	}
		168
		169	ecb_inline void
		170	cbor_free (CBOR *cbor)
		171	{
		172	SvREFCNT_dec (cbor->filter);
		173	SvREFCNT_dec (cbor->incr_count);
98	}	174	}
99		175
100	/////////////////////////////////////////////////////////////////////////////	176	/////////////////////////////////////////////////////////////////////////////
101	// utility functions	177	// utility functions
102		178
…		…
124	SvPV_renew (sv, SvCUR (sv) + 1);	200	SvPV_renew (sv, SvCUR (sv) + 1);
125	#endif	201	#endif
126	}	202	}
127	}	203	}
128		204
		205	// minimum length of a string to be registered for stringref
		206	ecb_inline STRLEN
		207	minimum_string_length (UV idx)
		208	{
		209	return idx <= 23 ? 3
		210	: idx <= 0xffU ? 4
		211	: idx <= 0xffffU ? 5
		212	: idx <= 0xffffffffU ? 7
		213	: 11;
		214	}
		215
129	/////////////////////////////////////////////////////////////////////////////	216	/////////////////////////////////////////////////////////////////////////////
130	// encoder	217	// encoder
131		218
132	// structure used for encoding CBOR	219	// structure used for encoding CBOR
133	typedef struct	220	typedef struct
…		…
135	char *cur; // SvPVX (sv) + current output position	222	char *cur; // SvPVX (sv) + current output position
136	char *end; // SvEND (sv)	223	char *end; // SvEND (sv)
137	SV *sv; // result scalar	224	SV *sv; // result scalar
138	CBOR cbor;	225	CBOR cbor;
139	U32 depth; // recursion level	226	U32 depth; // recursion level
140	HV *stringref; // string => index, or 0	227	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		228	UV stringref_idx;
141	HV *sharable; // ptr => index, or 0	229	HV *shareable; // ptr => index, or 0
142	HV *sharable_idx;	230	UV shareable_idx;
143	} enc_t;	231	} enc_t;
144		232
145	ecb_inline void	233	ecb_inline void
146	need (enc_t *enc, STRLEN len)	234	need (enc_t *enc, STRLEN len)
147	{	235	{
148	if (ecb_expect_false (enc->cur + len >= enc->end))	236	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
149	{	237	{
150	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	238	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
151	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	239	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
152	enc->cur = SvPVX (enc->sv) + cur;	240	enc->cur = SvPVX (enc->sv) + cur;
153	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	241	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
154	}	242	}
155	}	243	}
156		244
		245	static void encode_sv (enc_t *enc, SV *sv);
		246
157	ecb_inline void	247	ecb_inline void
158	encode_ch (enc_t *enc, char ch)	248	encode_ch (enc_t *enc, char ch)
159	{	249	{
160	need (enc, 1);	250	need (enc, 1);
161	*enc->cur++ = ch;	251	*enc->cur++ = ch;
162	}	252	}
163		253
		254	// used for tags, intregers, element counts and so on
164	static void	255	static void
165	encode_uint (enc_t *enc, int major, UV len)	256	encode_uint (enc_t *enc, int major, UV len)
166	{	257	{
167	need (enc, 9);	258	need (enc, 9);
168		259
169	if (len < 24)	260	if (ecb_expect_true (len < LENGTH_EXT1))
170	*enc->cur++ = major | len;	261	*enc->cur++ = major | len;
171	else if (len <= 0xff)	262	else if (ecb_expect_true (len <= 0xffU))
172	{	263	{
173	*enc->cur++ = major | 24;	264	*enc->cur++ = major | LENGTH_EXT1;
174	*enc->cur++ = len;	265	*enc->cur++ = len;
175	}	266	}
176	else if (len <= 0xffff)	267	else if (len <= 0xffffU)
177	{	268	{
178	*enc->cur++ = major | 25;	269	*enc->cur++ = major | LENGTH_EXT2;
179	*enc->cur++ = len >> 8;	270	*enc->cur++ = len >> 8;
180	*enc->cur++ = len;	271	*enc->cur++ = len;
181	}	272	}
182	else if (len <= 0xffffffff)	273	else if (len <= 0xffffffffU)
183	{	274	{
184	*enc->cur++ = major | 26;	275	*enc->cur++ = major | LENGTH_EXT4;
185	*enc->cur++ = len >> 24;	276	*enc->cur++ = len >> 24;
186	*enc->cur++ = len >> 16;	277	*enc->cur++ = len >> 16;
187	*enc->cur++ = len >> 8;	278	*enc->cur++ = len >> 8;
188	*enc->cur++ = len;	279	*enc->cur++ = len;
189	}	280	}
190	else	281	else
191	{	282	{
192	*enc->cur++ = major | 27;	283	*enc->cur++ = major | LENGTH_EXT8;
193	*enc->cur++ = len >> 56;	284	*enc->cur++ = len >> 56;
194	*enc->cur++ = len >> 48;	285	*enc->cur++ = len >> 48;
195	*enc->cur++ = len >> 40;	286	*enc->cur++ = len >> 40;
196	*enc->cur++ = len >> 32;	287	*enc->cur++ = len >> 32;
197	*enc->cur++ = len >> 24;	288	*enc->cur++ = len >> 24;
…		…
199	*enc->cur++ = len >> 8;	290	*enc->cur++ = len >> 8;
200	*enc->cur++ = len;	291	*enc->cur++ = len;
201	}	292	}
202	}	293	}
203		294
204	static void	295	// encodes a perl value into a CBOR integer
		296	ecb_inline void
		297	encode_int (enc_t *enc, SV *sv)
		298	{
		299	if (SvIsUV (sv))
		300	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
		301	else if (SvIVX (sv) >= 0)
		302	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
		303	else
		304	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
		305	}
		306
		307	ecb_inline void
		308	encode_tag (enc_t *enc, UV tag)
		309	{
		310	encode_uint (enc, MAJOR_TAG, tag);
		311	}
		312
		313	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		314	ecb_noinline static void
205	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	315	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
206	{	316	{
207	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	317	STRLEN ulen = len;
		318	U8 *p, *pend = (U8 *)str + len;
		319
		320	for (p = (U8 *)str; p < pend; ++p)
		321	ulen += *p >> 7; // count set high bits
		322
		323	encode_uint (enc, MAJOR_TEXT, ulen);
		324
		325	need (enc, ulen);
		326	for (p = (U8 *)str; p < pend; ++p)
		327	if (*p < 0x80)
		328	*enc->cur++ = *p;
		329	else
		330	{
		331	*enc->cur++ = 0xc0 + (*p >> 6);
		332	*enc->cur++ = 0x80 + (*p & 63);
		333	}
		334	}
		335
		336	ecb_inline void
		337	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		338	{
		339	if (ecb_expect_false (upgrade_utf8))
		340	if (!utf8)
		341	{
		342	encode_str_utf8 (enc, utf8, str, len);
		343	return;
		344	}
		345
		346	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
208	need (enc, len);	347	need (enc, len);
209	memcpy (enc->cur, str, len);	348	memcpy (enc->cur, str, len);
210	enc->cur += len;	349	enc->cur += len;
211	}	350	}
212		351
213	ecb_inline void	352	ecb_inline void
214	encode_tag (enc_t *enc, UV tag)	353	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
215	{	354	{
216	encode_uint (enc, 0xc0, tag);	355	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
217	}	356	{
		357	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
218		358
219	static int
220	encode_sharable2 (enc_t *enc, SV *sv)
221	{
222	if (!enc->sharable)
223	enc->sharable = (HV *)sv_2mortal ((SV *)newHV ());
224
225	SV **svp = hv_fetch (enc->sharable, &sv, sizeof (sv), 1);
226
227	if (SvOK (*svp))	359	if (SvOK (*svp))
228	{	360	{
		361	// already registered, use stringref
229	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);	362	encode_tag (enc, CBOR_TAG_STRINGREF);
230	encode_uint (enc, 0x00, SvUV (*svp));	363	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
231
232	return 1;	364	return;
233	}	365	}
234	else	366	else if (len >= minimum_string_length (enc->stringref_idx))
235	{	367	{
		368	// register only
236	sv_setuv (*svp, enc->sharable_idx++);	369	sv_setuv (*svp, enc->stringref_idx);
237	encode_tag (enc, CBOR_TAG_VALUE_SHARABLE);	370	++enc->stringref_idx;
238		371	}
239	return 0;
240	}	372	}
241	}
242		373
		374	encode_str (enc, upgrade_utf8, utf8, str, len);
		375	}
		376
243	ecb_inline int	377	ecb_inline void
		378	encode_float16 (enc_t *enc, NV nv)
		379	{
		380	need (enc, 1+2);
		381
		382	*enc->cur++ = MAJOR_MISC | MISC_FLOAT16;
		383
		384	uint16_t fp = ecb_float_to_binary16 (nv);
		385
		386	if (!ecb_big_endian ())
		387	fp = ecb_bswap16 (fp);
		388
		389	memcpy (enc->cur, &fp, 2);
		390	enc->cur += 2;
		391	}
		392
		393	ecb_inline void
		394	encode_float32 (enc_t *enc, NV nv)
		395	{
		396	need (enc, 1+4);
		397
		398	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
		399
		400	uint32_t fp = ecb_float_to_binary32 (nv);
		401
		402	if (!ecb_big_endian ())
		403	fp = ecb_bswap32 (fp);
		404
		405	memcpy (enc->cur, &fp, 4);
		406	enc->cur += 4;
		407	}
		408
		409	ecb_inline void
		410	encode_float64 (enc_t *enc, NV nv)
		411	{
		412	need (enc, 1+8);
		413
		414	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
		415
		416	uint64_t fp = ecb_double_to_binary64 (nv);
		417
		418	if (!ecb_big_endian ())
		419	fp = ecb_bswap64 (fp);
		420
		421	memcpy (enc->cur, &fp, 8);
		422	enc->cur += 8;
		423	}
		424
		425	ecb_inline void
		426	encode_bool (enc_t *enc, int istrue)
		427	{
		428	encode_ch (enc, istrue ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		429	}
		430
		431	// encodes an arrayref containing key-value pairs as CBOR map
		432	ecb_inline void
244	encode_sharable (enc_t *enc, SV *sv)	433	encode_array_as_map (enc_t *enc, SV *sv)
245	{	434	{
246	if (ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING)	435	if (enc->depth >= enc->cbor.max_depth)
247	&& ecb_expect_false (SvREFCNT (sv) > 1))	436	croak (ERR_NESTING_EXCEEDED);
248	return encode_sharable2 (enc, sv);
249		437
250	return 0;	438	++enc->depth;
251	}
252		439
253	static void encode_sv (enc_t *enc, SV *sv);	440	// as_map does error checking for us, but we re-check in case
		441	// things have changed.
		442
		443	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		444	croak ("CBOR::XS::as_map requires an array reference (did you change the array after calling as_map?)");
		445
		446	AV *av = (AV *)SvRV (sv);
		447	int i, len = av_len (av);
		448
		449	if (!(len & 1))
		450	croak ("CBOR::XS::as_map requires an even number of elements (did you change the array after calling as_map?)");
		451
		452	encode_uint (enc, MAJOR_MAP, (len + 1) >> 1);
		453
		454	for (i = 0; i <= len; ++i)
		455	{
		456	SV **svp = av_fetch (av, i, 0);
		457	encode_sv (enc, svp ? *svp : &PL_sv_undef);
		458	}
		459
		460	--enc->depth;
		461	}
		462
		463	ecb_inline void
		464	encode_forced (enc_t *enc, UV type, SV *sv)
		465	{
		466	switch (type)
		467	{
		468	case AS_CBOR:
		469	{
		470	STRLEN len;
		471	char *str = SvPVbyte (sv, len);
		472
		473	need (enc, len);
		474	memcpy (enc->cur, str, len);
		475	enc->cur += len;
		476	}
		477	break;
		478
		479	case AS_BYTES:
		480	{
		481	STRLEN len;
		482	char *str = SvPVbyte (sv, len);
		483	encode_strref (enc, 0, 0, str, len);
		484	}
		485	break;
		486
		487	case AS_TEXT:
		488	{
		489	STRLEN len;
		490	char *str = SvPVutf8 (sv, len);
		491	encode_strref (enc, 1, 1, str, len);
		492	}
		493	break;
		494
		495	case AS_INT: encode_int (enc, sv); break;
		496
		497	case AS_FLOAT16: encode_float16 (enc, SvNV (sv)); break;
		498	case AS_FLOAT32: encode_float32 (enc, SvNV (sv)); break;
		499	case AS_FLOAT64: encode_float64 (enc, SvNV (sv)); break;
		500
		501	case AS_MAP: encode_array_as_map (enc, sv); break;
		502
		503	default:
		504	croak ("encountered malformed CBOR::XS::Tagged object");
		505	}
		506	}
254		507
255	static void	508	static void
256	encode_av (enc_t *enc, AV *av)	509	encode_av (enc_t *enc, AV *av)
257	{	510	{
258	int i, len = av_len (av);	511	int i, len = av_len (av);
…		…
260	if (enc->depth >= enc->cbor.max_depth)	513	if (enc->depth >= enc->cbor.max_depth)
261	croak (ERR_NESTING_EXCEEDED);	514	croak (ERR_NESTING_EXCEEDED);
262		515
263	++enc->depth;	516	++enc->depth;
264		517
265	encode_uint (enc, 0x80, len + 1);	518	encode_uint (enc, MAJOR_ARRAY, len + 1);
266		519
		520	if (ecb_expect_false (SvMAGICAL (av)))
267	for (i = 0; i <= len; ++i)	521	for (i = 0; i <= len; ++i)
268	{	522	{
269	SV **svp = av_fetch (av, i, 0);	523	SV **svp = av_fetch (av, i, 0);
270	encode_sv (enc, svp ? *svp : &PL_sv_undef);	524	encode_sv (enc, svp ? *svp : &PL_sv_undef);
271	}	525	}
		526	else
		527	for (i = 0; i <= len; ++i)
		528	{
		529	SV *sv = AvARRAY (av)[i];
		530	encode_sv (enc, sv ? sv : &PL_sv_undef);
		531	}
272		532
273	--enc->depth;	533	--enc->depth;
274	}	534	}
275		535
276	static void	536	static void
…		…
284	++enc->depth;	544	++enc->depth;
285		545
286	int pairs = hv_iterinit (hv);	546	int pairs = hv_iterinit (hv);
287	int mg = SvMAGICAL (hv);	547	int mg = SvMAGICAL (hv);
288		548
289	if (mg)	549	if (ecb_expect_false (mg))
290	encode_ch (enc, 0xa0 | 31);	550	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
291	else	551	else
292	encode_uint (enc, 0xa0, pairs);	552	encode_uint (enc, MAJOR_MAP, pairs);
293		553
294	while ((he = hv_iternext (hv)))	554	while ((he = hv_iternext (hv)))
295	{	555	{
296	if (HeKLEN (he) == HEf_SVKEY)	556	if (HeKLEN (he) == HEf_SVKEY)
297	encode_sv (enc, HeSVKEY (he));	557	encode_sv (enc, HeSVKEY (he));
298	else	558	else
299	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	559	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
300		560
301	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	561	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
302	}	562	}
303		563
304	if (mg)	564	if (ecb_expect_false (mg))
305	encode_ch (enc, 0xe0 | 31);	565	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
306		566
307	--enc->depth;	567	--enc->depth;
308	}	568	}
309		569
310	// encode objects, arrays and special \0=false and \1=true values.	570	// encode objects, arrays and special \0=false and \1=true values.
311	static void	571	static void
312	encode_rv (enc_t *enc, SV *sv)	572	encode_rv (enc_t *enc, SV *sv)
313	{	573	{
314	svtype svt;
315
316	SvGETMAGIC (sv);	574	SvGETMAGIC (sv);
		575
317	svt = SvTYPE (sv);	576	svtype svt = SvTYPE (sv);
318
319	if (encode_sharable (enc, sv))
320	return;
321		577
322	if (ecb_expect_false (SvOBJECT (sv)))	578	if (ecb_expect_false (SvOBJECT (sv)))
323	{	579	{
324	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash	580	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
325	? types_boolean_stash	581	? types_boolean_stash
…		…
330	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	586	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
331	? cbor_tagged_stash	587	? cbor_tagged_stash
332	: gv_stashpv ("CBOR::XS::Tagged" , 1);	588	: gv_stashpv ("CBOR::XS::Tagged" , 1);
333		589
334	HV *stash = SvSTASH (sv);	590	HV *stash = SvSTASH (sv);
335	GV *method;
336		591
337	if (stash == boolean_stash)	592	if (stash == boolean_stash)
338	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	593	{
		594	encode_bool (enc, SvIV (sv));
		595	return;
		596	}
339	else if (stash == error_stash)	597	else if (stash == error_stash)
340	encode_ch (enc, 0xe0 | 23);	598	{
		599	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		600	return;
		601	}
341	else if (stash == tagged_stash)	602	else if (stash == tagged_stash)
342	{	603	{
343	if (svt != SVt_PVAV)	604	if (svt != SVt_PVAV)
344	croak ("encountered CBOR::XS::Tagged object that isn't an array");	605	croak ("encountered CBOR::XS::Tagged object that isn't an array");
345		606
		607	switch (av_len ((AV *)sv))
		608	{
		609	case 2-1:
		610	// actually a tagged value
346	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	611	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
347	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));	612	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		613	break;
		614
		615	case 3-1:
		616	// a forced type [value, type, undef]
		617	encode_forced (enc, SvUV (*av_fetch ((AV *)sv, 1, 1)), *av_fetch ((AV *)sv, 0, 1));
		618	break;
		619
		620	default:
		621	croak ("encountered malformed CBOR::XS::Tagged object");
		622	}
		623
		624	return;
		625	}
		626	}
		627
		628	if (ecb_expect_false (SvREFCNT (sv) > 1)
		629	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		630	{
		631	if (ecb_expect_false (!enc->shareable))
		632	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		633
		634	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		635
		636	if (SvOK (*svp))
348	}	637	{
		638	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		639	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		640	return;
		641	}
		642	else
		643	{
		644	sv_setuv (*svp, enc->shareable_idx);
		645	++enc->shareable_idx;
		646	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		647	}
		648	}
		649
		650	if (ecb_expect_false (SvOBJECT (sv)))
		651	{
		652	HV *stash = SvSTASH (sv);
		653	GV *method;
		654
		655	if (enc->cbor.flags & F_FORBID_OBJECTS)
		656	croak ("encountered object '%s', but forbid_objects is enabled",
		657	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
349	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))	658	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
350	{	659	{
351	dSP;	660	dSP;
352		661
353	ENTER; SAVETMPS; PUSHMARK (SP);	662	ENTER; SAVETMPS;
		663	PUSHMARK (SP);
354	// we re-bless the reference to get overload and other niceties right	664	// we re-bless the reference to get overload and other niceties right
355	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	665	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
356		666
357	PUTBACK;	667	PUTBACK;
358	// G_SCALAR ensures that return value is 1	668	// G_SCALAR ensures that return value is 1
…		…
371	}	681	}
372	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)	682	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
373	{	683	{
374	dSP;	684	dSP;
375		685
376	ENTER; SAVETMPS; PUSHMARK (SP);	686	ENTER; SAVETMPS;
		687	PUSHMARK (SP);
377	EXTEND (SP, 2);	688	EXTEND (SP, 2);
378	// we re-bless the reference to get overload and other niceties right	689	// we re-bless the reference to get overload and other niceties right
379	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));	690	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
380	PUSHs (sv_cbor);	691	PUSHs (sv_cbor);
381		692
…		…
386	// catch this surprisingly common error	697	// catch this surprisingly common error
387	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)	698	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
388	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));	699	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
389		700
390	encode_tag (enc, CBOR_TAG_PERL_OBJECT);	701	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
391	encode_uint (enc, 0x80, count + 1);	702	encode_uint (enc, MAJOR_ARRAY, count + 1);
392	encode_str (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));	703	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
393		704
394	while (count)	705	{
		706	int i;
		707
		708	for (i = 0; i < count; ++i)
395	encode_sv (enc, SP[1 - count--]);	709	encode_sv (enc, SP[i + 1 - count]);
		710
		711	SP -= count;
		712	}
396		713
397	PUTBACK;	714	PUTBACK;
398		715
399	FREETMPS; LEAVE;	716	FREETMPS; LEAVE;
400	}	717	}
…		…
418	{	735	{
419	double nv = SvNVX (sv);	736	double nv = SvNVX (sv);
420		737
421	need (enc, 9);	738	need (enc, 9);
422		739
423	if (ecb_expect_false (nv == (U32)nv))	740	if (ecb_expect_false (nv == (NV)(U32)nv))
424	encode_uint (enc, 0x00, (U32)nv);	741	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
425	//TODO: maybe I32?	742	//TODO: maybe I32?
426	else if (ecb_expect_false (nv == (float)nv))	743	else if (ecb_expect_false (nv == (float)nv))
427	{	744	encode_float32 (enc, nv);
428	uint32_t fp = ecb_float_to_binary32 (nv);
429
430	*enc->cur++ = 0xe0 | 26;
431
432	if (!ecb_big_endian ())
433	fp = ecb_bswap32 (fp);
434
435	memcpy (enc->cur, &fp, 4);
436	enc->cur += 4;
437	}
438	else	745	else
439	{	746	encode_float64 (enc, nv);
440	uint64_t fp = ecb_double_to_binary64 (nv);
441
442	*enc->cur++ = 0xe0 | 27;
443
444	if (!ecb_big_endian ())
445	fp = ecb_bswap64 (fp);
446
447	memcpy (enc->cur, &fp, 8);
448	enc->cur += 8;
449	}
450	}	747	}
451		748
452	static void	749	static void
453	encode_sv (enc_t *enc, SV *sv)	750	encode_sv (enc_t *enc, SV *sv)
454	{	751	{
455	SvGETMAGIC (sv);	752	SvGETMAGIC (sv);
456		753
457	if (encode_sharable (enc, sv))
458	return;
459
460	if (SvPOKp (sv))	754	if (SvPOKp (sv))
461	{	755	{
462	STRLEN len;	756	STRLEN len;
463	char *str = SvPV (sv, len);	757	char *str = SvPV (sv, len);
464	encode_str (enc, SvUTF8 (sv), str, len);	758	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
465	}	759	}
466	else if (SvNOKp (sv))	760	else if (SvNOKp (sv))
467	encode_nv (enc, sv);	761	encode_nv (enc, sv);
468	else if (SvIOKp (sv))	762	else if (SvIOKp (sv))
469	{	763	encode_int (enc, sv);
470	if (SvIsUV (sv))
471	encode_uint (enc, 0x00, SvUVX (sv));
472	else if (SvIVX (sv) >= 0)
473	encode_uint (enc, 0x00, SvIVX (sv));
474	else
475	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
476	}
477	else if (SvROK (sv))	764	else if (SvROK (sv))
478	encode_rv (enc, SvRV (sv));	765	encode_rv (enc, SvRV (sv));
479	else if (!SvOK (sv))	766	else if (!SvOK (sv))
480	encode_ch (enc, 0xe0 | 22);	767	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
481	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	768	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
482	encode_ch (enc, 0xe0 | 23);	769	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
483	else	770	else
484	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	771	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
485	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	772	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
486	}	773	}
487		774
488	static SV *	775	static SV *
489	encode_cbor (SV *scalar, CBOR *cbor)	776	encode_cbor (SV *scalar, CBOR *cbor)
490	{	777	{
491	enc_t enc = { };	778	enc_t enc = { 0 };
492		779
493	enc.cbor = *cbor;	780	enc.cbor = *cbor;
494	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	781	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
495	enc.cur = SvPVX (enc.sv);	782	enc.cur = SvPVX (enc.sv);
496	enc.end = SvEND (enc.sv);	783	enc.end = SvEND (enc.sv);
497		784
498	SvPOK_only (enc.sv);	785	SvPOK_only (enc.sv);
		786
		787	if (cbor->flags & F_PACK_STRINGS)
		788	{
		789	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		790	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		791	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		792	}
		793
499	encode_sv (&enc, scalar);	794	encode_sv (&enc, scalar);
500		795
501	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	796	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
502	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	797	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
503		798
…		…
517	U8 *end; // end of input string	812	U8 *end; // end of input string
518	const char *err; // parse error, if != 0	813	const char *err; // parse error, if != 0
519	CBOR cbor;	814	CBOR cbor;
520	U32 depth; // recursion depth	815	U32 depth; // recursion depth
521	U32 maxdepth; // recursion depth limit	816	U32 maxdepth; // recursion depth limit
522	AV *sharable;	817	AV *shareable;
		818	AV *stringref;
		819	SV *decode_tagged;
		820	SV *err_sv; // optional sv for error, needs to be freed
523	} dec_t;	821	} dec_t;
524		822
525	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	823	// set dec->err to ERRSV
		824	ecb_cold static void
		825	err_errsv (dec_t *dec)
		826	{
		827	if (!dec->err)
		828	{
		829	dec->err_sv = newSVsv (ERRSV);
526		830
527	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	831	// chop off the trailing \n
		832	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		833	*SvEND (dec->err_sv) = 0;
528		834
		835	dec->err = SvPVutf8_nolen (dec->err_sv);
		836	}
		837	}
		838
		839	// the following functions are used to reduce code size and help the compiler to optimise
		840	ecb_cold static void
		841	err_set (dec_t *dec, const char *reason)
		842	{
		843	if (!dec->err)
		844	dec->err = reason;
		845	}
		846
		847	ecb_cold static void
		848	err_unexpected_end (dec_t *dec)
		849	{
		850	err_set (dec, "unexpected end of CBOR data");
		851	}
		852
		853	#define ERR_DO(do) SB do; goto fail; SE
		854	#define ERR(reason) ERR_DO (err_set (dec, reason))
		855	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		856
		857	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		858
529	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	859	#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED)
530	#define DEC_DEC_DEPTH --dec->depth	860	#define DEC_DEC_DEPTH --dec->depth
531		861
532	static UV	862	static UV
533	decode_uint (dec_t *dec)	863	decode_uint (dec_t *dec)
534	{	864	{
535	switch (*dec->cur & 31)	865	U8 m = *dec->cur & MINOR_MASK;
536	{	866	++dec->cur;
537	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
538	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
539	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
540	return *dec->cur++ & 31;
541		867
542	case 24:	868	if (ecb_expect_true (m < LENGTH_EXT1))
		869	return m;
		870	else if (ecb_expect_true (m == LENGTH_EXT1))
		871	{
543	WANT (2);	872	WANT (1);
544	dec->cur += 2;	873	dec->cur += 1;
545	return dec->cur[-1];	874	return dec->cur[-1];
546		875	}
547	case 25:	876	else if (ecb_expect_true (m == LENGTH_EXT2))
		877	{
548	WANT (3);	878	WANT (2);
549	dec->cur += 3;	879	dec->cur += 2;
550	return (((UV)dec->cur[-2]) << 8)	880	return (((UV)dec->cur[-2]) << 8)
551	| ((UV)dec->cur[-1]);	881	| ((UV)dec->cur[-1]);
552		882	}
553	case 26:	883	else if (ecb_expect_true (m == LENGTH_EXT4))
		884	{
554	WANT (5);	885	WANT (4);
555	dec->cur += 5;	886	dec->cur += 4;
556	return (((UV)dec->cur[-4]) << 24)	887	return (((UV)dec->cur[-4]) << 24)
557	| (((UV)dec->cur[-3]) << 16)	888	| (((UV)dec->cur[-3]) << 16)
558	| (((UV)dec->cur[-2]) << 8)	889	| (((UV)dec->cur[-2]) << 8)
559	| ((UV)dec->cur[-1]);	890	| ((UV)dec->cur[-1]);
560		891	}
561	case 27:	892	else if (ecb_expect_true (m == LENGTH_EXT8))
		893	{
562	WANT (9);	894	WANT (8);
563	dec->cur += 9;	895	dec->cur += 8;
		896
		897	return
		898	#if UVSIZE < 8
		899	0
		900	#else
564	return (((UV)dec->cur[-8]) << 56)	901	(((UV)dec->cur[-8]) << 56)
565	| (((UV)dec->cur[-7]) << 48)	902	| (((UV)dec->cur[-7]) << 48)
566	| (((UV)dec->cur[-6]) << 40)	903	| (((UV)dec->cur[-6]) << 40)
567	| (((UV)dec->cur[-5]) << 32)	904	| (((UV)dec->cur[-5]) << 32)
		905	#endif
568	| (((UV)dec->cur[-4]) << 24)	906	| (((UV)dec->cur[-4]) << 24)
569	| (((UV)dec->cur[-3]) << 16)	907	| (((UV)dec->cur[-3]) << 16)
570	| (((UV)dec->cur[-2]) << 8)	908	| (((UV)dec->cur[-2]) << 8)
571	| ((UV)dec->cur[-1]);	909	| ((UV)dec->cur[-1]);
572		910	}
573	default:	911	else
574	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	912	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
575	}
576		913
577	fail:	914	fail:
578	return 0;	915	return 0;
579	}	916	}
580		917
…		…
585	{	922	{
586	AV *av = newAV ();	923	AV *av = newAV ();
587		924
588	DEC_INC_DEPTH;	925	DEC_INC_DEPTH;
589		926
590	if ((*dec->cur & 31) == 31)	927	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
591	{	928	{
592	++dec->cur;	929	++dec->cur;
593		930
594	for (;;)	931	for (;;)
595	{	932	{
596	WANT (1);	933	WANT (1);
597		934
598	if (*dec->cur == (0xe0 | 31))	935	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
599	{	936	{
600	++dec->cur;	937	++dec->cur;
601	break;	938	break;
602	}	939	}
603		940
604	av_push (av, decode_sv (dec));	941	av_push (av, decode_sv (dec));
605	}	942	}
606	}	943	}
607	else	944	else
608	{	945	{
609	int i, len = decode_uint (dec);	946	UV i, len = decode_uint (dec);
610		947
		948	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
611	av_fill (av, len - 1);	949	av_fill (av, len - 1);
612		950
613	for (i = 0; i < len; ++i)	951	for (i = 0; i < len; ++i)
614	AvARRAY (av)[i] = decode_sv (dec);	952	AvARRAY (av)[i] = decode_sv (dec);
615	}	953	}
616		954
617	DEC_DEC_DEPTH;	955	DEC_DEC_DEPTH;
618	return newRV_noinc ((SV *)av);	956	return newRV_noinc ((SV *)av);
619		957
620	fail:	958	fail:
621	SvREFCNT_dec (av);	959	SvREFCNT_dec_NN (av);
622	DEC_DEC_DEPTH;	960	DEC_DEC_DEPTH;
623	return &PL_sv_undef;	961	return &PL_sv_undef;
624	}	962	}
625		963
626	static void	964	static void
627	decode_he (dec_t *dec, HV *hv)	965	decode_he (dec_t *dec, HV *hv)
628	{	966	{
629	// for speed reasons, we specialcase single-string	967	// for speed reasons, we specialcase single-string
630	// byte or utf-8 strings as keys.	968	// byte or utf-8 strings as keys, but only when !stringref
631		969
632	if (*dec->cur >= 0x40 && *dec->cur <= 0x40 + 27)	970	if (ecb_expect_true (!dec->stringref))
		971	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
633	{	972	{
634	I32 len = decode_uint (dec);	973	STRLEN len = decode_uint (dec);
635	char *key = (char *)dec->cur;	974	char *key = (char *)dec->cur;
636		975
		976	WANT (len);
637	dec->cur += len;	977	dec->cur += len;
638		978
639	hv_store (hv, key, len, decode_sv (dec), 0);	979	hv_store (hv, key, len, decode_sv (dec), 0);
		980
		981	return;
640	}	982	}
641	else if (*dec->cur >= 0x60 && *dec->cur <= 0x60 + 27)	983	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
642	{	984	{
643	I32 len = decode_uint (dec);	985	STRLEN len = decode_uint (dec);
644	char *key = (char *)dec->cur;	986	char *key = (char *)dec->cur;
645		987
		988	WANT (len);
646	dec->cur += len;	989	dec->cur += len;
647		990
		991	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		992	if (!is_utf8_string ((U8 *)key, len))
		993	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		994
648	hv_store (hv, key, -len, decode_sv (dec), 0);	995	hv_store (hv, key, -len, decode_sv (dec), 0);
		996
		997	return;
649	}	998	}
650	else	999
651	{
652	SV *k = decode_sv (dec);	1000	SV *k = decode_sv (dec);
653	SV *v = decode_sv (dec);	1001	SV *v = decode_sv (dec);
654		1002
		1003	// we leak memory if uncaught exceptions are thrown by random magical
		1004	// methods, and this is hopefully the only place where it can happen,
		1005	// so if there is a chance of an exception, take the very slow path.
		1006	// since catching exceptions is "undocumented/internal/forbidden" by
		1007	// the new p5p powers, we need to call out to a perl function :/
		1008	if (ecb_expect_false (SvAMAGIC (k)))
		1009	{
		1010	dSP;
		1011
		1012	ENTER; SAVETMPS;
		1013	PUSHMARK (SP);
		1014	EXTEND (SP, 3);
		1015	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		1016	PUSHs (sv_2mortal (k));
		1017	PUSHs (sv_2mortal (v));
		1018
		1019	PUTBACK;
		1020	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		1021	SPAGAIN;
		1022
		1023	FREETMPS; LEAVE;
		1024
		1025	if (SvTRUE (ERRSV))
		1026	ERR_ERRSV;
		1027
		1028	return;
		1029	}
		1030
655	hv_store_ent (hv, k, v, 0);	1031	hv_store_ent (hv, k, v, 0);
656	SvREFCNT_dec (k);	1032	SvREFCNT_dec_NN (k);
657	}	1033
		1034	fail:
		1035	;
658	}	1036	}
659		1037
660	static SV *	1038	static SV *
661	decode_hv (dec_t *dec)	1039	decode_hv (dec_t *dec)
662	{	1040	{
663	HV *hv = newHV ();	1041	HV *hv = newHV ();
664		1042
665	DEC_INC_DEPTH;	1043	DEC_INC_DEPTH;
666		1044
667	if ((*dec->cur & 31) == 31)	1045	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
668	{	1046	{
669	++dec->cur;	1047	++dec->cur;
670		1048
671	for (;;)	1049	for (;;)
672	{	1050	{
673	WANT (1);	1051	WANT (1);
674		1052
675	if (*dec->cur == (0xe0 | 31))	1053	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
676	{	1054	{
677	++dec->cur;	1055	++dec->cur;
678	break;	1056	break;
679	}	1057	}
680		1058
681	decode_he (dec, hv);	1059	decode_he (dec, hv);
682	}	1060	}
683	}	1061	}
684	else	1062	else
685	{	1063	{
686	int pairs = decode_uint (dec);	1064	UV pairs = decode_uint (dec);
		1065
		1066	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
687		1067
688	while (pairs--)	1068	while (pairs--)
689	decode_he (dec, hv);	1069	decode_he (dec, hv);
690	}	1070	}
691		1071
692	DEC_DEC_DEPTH;	1072	DEC_DEC_DEPTH;
693	return newRV_noinc ((SV *)hv);	1073	return newRV_noinc ((SV *)hv);
694		1074
695	fail:	1075	fail:
696	SvREFCNT_dec (hv);	1076	SvREFCNT_dec_NN (hv);
697	DEC_DEC_DEPTH;	1077	DEC_DEC_DEPTH;
698	return &PL_sv_undef;	1078	return &PL_sv_undef;
699	}	1079	}
700		1080
701	static SV *	1081	static SV *
702	decode_str (dec_t *dec, int utf8)	1082	decode_str (dec_t *dec, int utf8)
703	{	1083	{
704	SV *sv = 0;	1084	SV *sv = 0;
705		1085
706	if ((*dec->cur & 31) == 31)	1086	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
707	{	1087	{
		1088	// indefinite length strings
708	++dec->cur;	1089	++dec->cur;
709		1090
		1091	U8 major = *dec->cur & MAJOR_MISC;
		1092
710	sv = newSVpvn ("", 0);	1093	sv = newSVpvn ("", 0);
711		1094
712	// not very fast, and certainly not robust against illegal input
713	for (;;)	1095	for (;;)
714	{	1096	{
715	WANT (1);	1097	WANT (1);
716		1098
717	if (*dec->cur == (0xe0 | 31))	1099	if ((*dec->cur - major) > LENGTH_EXT8)
		1100	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
718	{	1101	{
719	++dec->cur;	1102	++dec->cur;
720	break;	1103	break;
721	}	1104	}
		1105	else
		1106	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
722		1107
723	sv_catsv (sv, decode_sv (dec));	1108	STRLEN len = decode_uint (dec);
		1109
		1110	WANT (len);
		1111	sv_catpvn (sv, dec->cur, len);
		1112	dec->cur += len;
724	}	1113	}
725	}	1114	}
726	else	1115	else
727	{	1116	{
728	STRLEN len = decode_uint (dec);	1117	STRLEN len = decode_uint (dec);
729		1118
730	WANT (len);	1119	WANT (len);
731	sv = newSVpvn (dec->cur, len);	1120	sv = newSVpvn (dec->cur, len);
732	dec->cur += len;	1121	dec->cur += len;
		1122
		1123	if (ecb_expect_false (dec->stringref)
		1124	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		1125	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
733	}	1126	}
734		1127
735	if (utf8)	1128	if (utf8)
		1129	{
		1130	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		1131	if (!is_utf8_string (SvPVX (sv), SvCUR (sv)))
		1132	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		1133
736	SvUTF8_on (sv);	1134	SvUTF8_on (sv);
		1135	}
737		1136
738	return sv;	1137	return sv;
739		1138
740	fail:	1139	fail:
741	SvREFCNT_dec (sv);	1140	SvREFCNT_dec (sv);
…		…
743	}	1142	}
744		1143
745	static SV *	1144	static SV *
746	decode_tagged (dec_t *dec)	1145	decode_tagged (dec_t *dec)
747	{	1146	{
		1147	SV *sv = 0;
748	UV tag = decode_uint (dec);	1148	UV tag = decode_uint (dec);
749	SV *sv = decode_sv (dec);	1149
		1150	WANT (1);
750		1151
751	switch (tag)	1152	switch (tag)
752	{	1153	{
753	case CBOR_TAG_MAGIC:	1154	case CBOR_TAG_MAGIC:
754	return sv;	1155	sv = decode_sv (dec);
		1156	break;
755		1157
756	case CBOR_TAG_INDIRECTION:	1158	case CBOR_TAG_INDIRECTION:
757	return newRV_noinc (sv);	1159	sv = newRV_noinc (decode_sv (dec));
		1160	break;
758		1161
		1162	case CBOR_TAG_STRINGREF_NAMESPACE:
		1163	{
		1164	// do not use SAVETMPS/FREETMPS, as these will
		1165	// erase mortalised caches, e.g. "shareable"
		1166	ENTER;
		1167
		1168	SAVESPTR (dec->stringref);
		1169	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1170
		1171	sv = decode_sv (dec);
		1172
		1173	LEAVE;
		1174	}
		1175	break;
		1176
		1177	case CBOR_TAG_STRINGREF:
		1178	{
		1179	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1180	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1181
		1182	UV idx = decode_uint (dec);
		1183
		1184	if (!dec->stringref || idx >= (UV)(1 + AvFILLp (dec->stringref)))
		1185	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1186
		1187	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1188	}
		1189	break;
		1190
759	case CBOR_TAG_VALUE_SHARABLE:	1191	case CBOR_TAG_VALUE_SHAREABLE:
		1192	{
760	if (ecb_expect_false (!dec->sharable))	1193	if (ecb_expect_false (!dec->shareable))
761	dec->sharable = (AV *)sv_2mortal ((SV *)newAV ());	1194	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
762		1195
		1196	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1197	{
		1198	sv = newSV (0);
763	av_push (dec->sharable, SvREFCNT_inc_NN (sv));	1199	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
764		1200
765	return sv;	1201	SV *osv = decode_sv (dec);
		1202	sv_setsv (sv, osv);
		1203	SvREFCNT_dec_NN (osv);
		1204	}
		1205	else
		1206	{
		1207	av_push (dec->shareable, &PL_sv_undef);
		1208	int idx = AvFILLp (dec->shareable);
		1209	sv = decode_sv (dec);
		1210	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1211	}
		1212	}
		1213	break;
766		1214
767	case CBOR_TAG_VALUE_SHAREDREF:	1215	case CBOR_TAG_VALUE_SHAREDREF:
768	{	1216	{
769	// TODO: should verify that the sv atcually was a CBOR unsigned integer	1217	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
770	UV idx = SvUV (sv);	1218	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
771		1219
		1220	UV idx = decode_uint (dec);
		1221
772	if (!dec->sharable || idx > AvFILLp (dec->sharable))	1222	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
773	ERR ("corrupted CBOR data (sharedref index out of bounds)");	1223	ERR ("corrupted CBOR data (sharedref index out of bounds)");
774		1224
775	SvREFCNT_dec (sv);
776
777	return SvREFCNT_inc_NN (AvARRAY (dec->sharable)[idx]);	1225	sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
		1226
		1227	if (sv == &PL_sv_undef)
		1228	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
778	}	1229	}
		1230	break;
779		1231
780	case CBOR_TAG_PERL_OBJECT:	1232	case CBOR_TAG_PERL_OBJECT:
781	{	1233	{
		1234	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1235	goto filter;
		1236
		1237	sv = decode_sv (dec);
		1238
782	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)	1239	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
783	ERR ("corrupted CBOR data (non-array perl object)");	1240	ERR ("corrupted CBOR data (non-array perl object)");
784		1241
785	AV *av = (AV *)SvRV (sv);	1242	AV *av = (AV *)SvRV (sv);
786	int len = av_len (av) + 1;	1243	int len = av_len (av) + 1;
…		…
794	if (!method)	1251	if (!method)
795	ERR ("cannot decode perl-object (package does not have a THAW method)");	1252	ERR ("cannot decode perl-object (package does not have a THAW method)");
796		1253
797	dSP;	1254	dSP;
798		1255
799	ENTER; SAVETMPS; PUSHMARK (SP);	1256	ENTER; SAVETMPS;
		1257	PUSHMARK (SP);
800	EXTEND (SP, len + 1);	1258	EXTEND (SP, len + 1);
801	// we re-bless the reference to get overload and other niceties right	1259	// we re-bless the reference to get overload and other niceties right
802	PUSHs (*av_fetch (av, 0, 1));	1260	PUSHs (*av_fetch (av, 0, 1));
803	PUSHs (sv_cbor);	1261	PUSHs (sv_cbor);
804		1262
…		…
812	SPAGAIN;	1270	SPAGAIN;
813		1271
814	if (SvTRUE (ERRSV))	1272	if (SvTRUE (ERRSV))
815	{	1273	{
816	FREETMPS; LEAVE;	1274	FREETMPS; LEAVE;
817	ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));	1275	ERR_ERRSV;
818	}	1276	}
819		1277
820	SvREFCNT_dec (sv);	1278	SvREFCNT_dec_NN (sv);
821	sv = SvREFCNT_inc (POPs);	1279	sv = SvREFCNT_inc (POPs);
822		1280
823	PUTBACK;	1281	PUTBACK;
824		1282
825	FREETMPS; LEAVE;	1283	FREETMPS; LEAVE;
826
827	return sv;
828	}	1284	}
		1285	break;
829		1286
830	default:	1287	default:
		1288	filter:
		1289	{
		1290	SV *tag_sv = newSVuv (tag);
		1291
		1292	sv = decode_sv (dec);
		1293
		1294	dSP;
		1295	ENTER; SAVETMPS;
		1296	PUSHMARK (SP);
		1297	EXTEND (SP, 2);
		1298	PUSHs (tag_sv);
		1299	PUSHs (sv);
		1300
		1301	PUTBACK;
		1302	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1303	SPAGAIN;
		1304
		1305	if (SvTRUE (ERRSV))
831	{	1306	{
		1307	SvREFCNT_dec_NN (tag_sv);
		1308	FREETMPS; LEAVE;
		1309	ERR_ERRSV;
		1310	}
		1311
		1312	if (count)
		1313	{
		1314	SvREFCNT_dec_NN (tag_sv);
		1315	SvREFCNT_dec_NN (sv);
		1316	sv = SvREFCNT_inc_NN (TOPs);
		1317	SP -= count;
		1318	}
		1319	else
		1320	{
832	AV *av = newAV ();	1321	AV *av = newAV ();
833	av_push (av, newSVuv (tag));	1322	av_push (av, tag_sv);
834	av_push (av, sv);	1323	av_push (av, sv);
835		1324
836	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	1325	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
837	? cbor_tagged_stash	1326	? cbor_tagged_stash
838	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1327	: gv_stashpv ("CBOR::XS::Tagged" , 1);
839
840	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);	1328	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
841	}	1329	}
		1330
		1331	PUTBACK;
		1332
		1333	FREETMPS; LEAVE;
		1334	}
		1335	break;
842	}	1336	}
		1337
		1338	return sv;
843		1339
844	fail:	1340	fail:
845	SvREFCNT_dec (sv);	1341	SvREFCNT_dec (sv);
846	return &PL_sv_undef;	1342	return &PL_sv_undef;
847	}	1343	}
…		…
849	static SV *	1345	static SV *
850	decode_sv (dec_t *dec)	1346	decode_sv (dec_t *dec)
851	{	1347	{
852	WANT (1);	1348	WANT (1);
853		1349
854	switch (*dec->cur >> 5)	1350	switch (*dec->cur >> MAJOR_SHIFT)
855	{	1351	{
856	case 0: // unsigned int	1352	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
857	return newSVuv (decode_uint (dec));	1353	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
858	case 1: // negative int	1354	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
859	return newSViv (-1 - (IV)decode_uint (dec));	1355	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
860	case 2: // octet string	1356	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
861	return decode_str (dec, 0);	1357	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
862	case 3: // utf-8 string	1358	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
863	return decode_str (dec, 1);	1359
864	case 4: // array	1360	case MAJOR_MISC >> MAJOR_SHIFT:
865	return decode_av (dec);
866	case 5: // map
867	return decode_hv (dec);
868	case 6: // tag
869	return decode_tagged (dec);
870	case 7: // misc
871	switch (*dec->cur++ & 31)	1361	switch (*dec->cur++ & MINOR_MASK)
872	{	1362	{
873	case 20:	1363	case SIMPLE_FALSE:
874	#if CBOR_SLOW	1364	#if CBOR_SLOW
875	types_false = get_bool ("Types::Serialiser::false");	1365	types_false = get_bool ("Types::Serialiser::false");
876	#endif	1366	#endif
877	return newSVsv (types_false);	1367	return newSVsv (types_false);
878	case 21:	1368	case SIMPLE_TRUE:
879	#if CBOR_SLOW	1369	#if CBOR_SLOW
880	types_true = get_bool ("Types::Serialiser::true");	1370	types_true = get_bool ("Types::Serialiser::true");
881	#endif	1371	#endif
882	return newSVsv (types_true);	1372	return newSVsv (types_true);
883	case 22:	1373	case SIMPLE_NULL:
884	return newSVsv (&PL_sv_undef);	1374	return newSVsv (&PL_sv_undef);
885	case 23:	1375	case SIMPLE_UNDEF:
886	#if CBOR_SLOW	1376	#if CBOR_SLOW
887	types_error = get_bool ("Types::Serialiser::error");	1377	types_error = get_bool ("Types::Serialiser::error");
888	#endif	1378	#endif
889	return newSVsv (types_error);	1379	return newSVsv (types_error);
890		1380
891	case 25:	1381	case MISC_FLOAT16:
892	{	1382	{
893	WANT (2);	1383	WANT (2);
894		1384
895	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1385	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
896	dec->cur += 2;	1386	dec->cur += 2;
897		1387
898	return newSVnv (ecb_binary16_to_float (fp));	1388	return newSVnv (ecb_binary16_to_float (fp));
899	}	1389	}
900		1390
901	case 26:	1391	case MISC_FLOAT32:
902	{	1392	{
903	uint32_t fp;	1393	uint32_t fp;
904	WANT (4);	1394	WANT (4);
905	memcpy (&fp, dec->cur, 4);	1395	memcpy (&fp, dec->cur, 4);
906	dec->cur += 4;	1396	dec->cur += 4;
…		…
909	fp = ecb_bswap32 (fp);	1399	fp = ecb_bswap32 (fp);
910		1400
911	return newSVnv (ecb_binary32_to_float (fp));	1401	return newSVnv (ecb_binary32_to_float (fp));
912	}	1402	}
913		1403
914	case 27:	1404	case MISC_FLOAT64:
915	{	1405	{
916	uint64_t fp;	1406	uint64_t fp;
917	WANT (8);	1407	WANT (8);
918	memcpy (&fp, dec->cur, 8);	1408	memcpy (&fp, dec->cur, 8);
919	dec->cur += 8;	1409	dec->cur += 8;
…		…
922	fp = ecb_bswap64 (fp);	1412	fp = ecb_bswap64 (fp);
923		1413
924	return newSVnv (ecb_binary64_to_double (fp));	1414	return newSVnv (ecb_binary64_to_double (fp));
925	}	1415	}
926		1416
927	// 0..19 unassigned	1417	// 0..19 unassigned simple
928	// 24 reserved + unassigned (reserved values are not encodable)	1418	// 24 reserved + unassigned simple (reserved values are not encodable)
		1419	// 28-30 unassigned misc
		1420	// 31 break code
929	default:	1421	default:
930	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1422	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
931	}	1423	}
932		1424
933	break;	1425	break;
934	}	1426	}
935		1427
…		…
938	}	1430	}
939		1431
940	static SV *	1432	static SV *
941	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1433	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
942	{	1434	{
943	dec_t dec = { };	1435	dec_t dec = { 0 };
944	SV *sv;	1436	SV *sv;
945	STRLEN len;	1437	STRLEN len;
946	char *data = SvPVbyte (string, len);	1438	char *data = SvPVbyte (string, len);
947		1439
948	if (len > cbor->max_size && cbor->max_size)	1440	if (len > cbor->max_size && cbor->max_size)
…		…
962	if (dec.cur != dec.end && !dec.err)	1454	if (dec.cur != dec.end && !dec.err)
963	dec.err = "garbage after CBOR object";	1455	dec.err = "garbage after CBOR object";
964		1456
965	if (dec.err)	1457	if (dec.err)
966	{	1458	{
		1459	if (dec.shareable)
		1460	{
		1461	// need to break cyclic links, which would all be in shareable
		1462	int i;
		1463	SV **svp;
		1464
		1465	for (i = av_len (dec.shareable) + 1; i--; )
		1466	if ((svp = av_fetch (dec.shareable, i, 0)))
		1467	sv_setsv (*svp, &PL_sv_undef);
		1468	}
		1469
967	SvREFCNT_dec (sv);	1470	SvREFCNT_dec_NN (sv);
		1471
		1472	if (dec.err_sv)
		1473	sv_2mortal (dec.err_sv);
		1474
968	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);	1475	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
969	}	1476	}
970		1477
971	sv = sv_2mortal (sv);	1478	sv = sv_2mortal (sv);
972		1479
973	return sv;	1480	return sv;
974	}	1481	}
975		1482
		1483	/////////////////////////////////////////////////////////////////////////////
		1484	// incremental parser
		1485
		1486	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1487
		1488	// returns 0 for notyet, 1 for success or error
		1489	static int
		1490	incr_parse (CBOR *self, SV *cborstr)
		1491	{
		1492	STRLEN cur;
		1493	SvPV (cborstr, cur);
		1494
		1495	while (ecb_expect_true (self->incr_need <= cur))
		1496	{
		1497	// table of integer count bytes
		1498	static I8 incr_len[MINOR_MASK + 1] = {
		1499	0, 0, 0, 0, 0, 0, 0, 0,
		1500	0, 0, 0, 0, 0, 0, 0, 0,
		1501	0, 0, 0, 0, 0, 0, 0, 0,
		1502	1, 2, 4, 8,-1,-1,-1,-2
		1503	};
		1504
		1505	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1506	U8 m = *p & MINOR_MASK;
		1507	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1508	I8 ilen = incr_len[m];
		1509
		1510	self->incr_need = self->incr_pos + 1;
		1511
		1512	if (ecb_expect_false (ilen < 0))
		1513	{
		1514	if (m != MINOR_INDEF)
		1515	return 1; // error
		1516
		1517	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1518	{
		1519	if (count >= 0)
		1520	return 1; // error
		1521
		1522	count = 1;
		1523	}
		1524	else
		1525	{
		1526	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1527	count = -1;
		1528	}
		1529	}
		1530	else
		1531	{
		1532	self->incr_need += ilen;
		1533	if (ecb_expect_false (self->incr_need > cur))
		1534	return 0;
		1535
		1536	int major = *p >> MAJOR_SHIFT;
		1537
		1538	switch (major)
		1539	{
		1540	case MAJOR_TAG >> MAJOR_SHIFT:
		1541	++count; // tags merely prefix another value
		1542	break;
		1543
		1544	case MAJOR_BYTES >> MAJOR_SHIFT:
		1545	case MAJOR_TEXT >> MAJOR_SHIFT:
		1546	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1547	case MAJOR_MAP >> MAJOR_SHIFT:
		1548	{
		1549	UV len;
		1550
		1551	if (ecb_expect_false (ilen))
		1552	{
		1553	len = 0;
		1554
		1555	do {
		1556	len = (len << 8) | *++p;
		1557	} while (--ilen);
		1558	}
		1559	else
		1560	len = m;
		1561
		1562	switch (major)
		1563	{
		1564	case MAJOR_BYTES >> MAJOR_SHIFT:
		1565	case MAJOR_TEXT >> MAJOR_SHIFT:
		1566	self->incr_need += len;
		1567	if (ecb_expect_false (self->incr_need > cur))
		1568	return 0;
		1569
		1570	break;
		1571
		1572	case MAJOR_MAP >> MAJOR_SHIFT:
		1573	len <<= 1;
		1574	/* FALLTHROUGH */
		1575	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1576	if (len)
		1577	{
		1578	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1579	count = len + 1;
		1580	}
		1581	break;
		1582	}
		1583	}
		1584	}
		1585	}
		1586
		1587	self->incr_pos = self->incr_need;
		1588
		1589	if (count > 0)
		1590	{
		1591	while (!--count)
		1592	{
		1593	if (!AvFILLp (self->incr_count))
		1594	return 1; // done
		1595
		1596	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1597	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1598	}
		1599
		1600	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1601	}
		1602	}
		1603
		1604	return 0;
		1605	}
		1606
		1607
976	/////////////////////////////////////////////////////////////////////////////	1608	/////////////////////////////////////////////////////////////////////////////
977	// XS interface functions	1609	// XS interface functions
978		1610
979	MODULE = CBOR::XS PACKAGE = CBOR::XS	1611	MODULE = CBOR::XS PACKAGE = CBOR::XS
980		1612
…		…
988		1620
989	types_true = get_bool ("Types::Serialiser::true" );	1621	types_true = get_bool ("Types::Serialiser::true" );
990	types_false = get_bool ("Types::Serialiser::false");	1622	types_false = get_bool ("Types::Serialiser::false");
991	types_error = get_bool ("Types::Serialiser::error");	1623	types_error = get_bool ("Types::Serialiser::error");
992		1624
		1625	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1626
993	sv_cbor = newSVpv ("CBOR", 0);	1627	sv_cbor = newSVpv ("CBOR", 0);
994	SvREADONLY_on (sv_cbor);	1628	SvREADONLY_on (sv_cbor);
		1629
		1630	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
995	}	1631	}
996		1632
997	PROTOTYPES: DISABLE	1633	PROTOTYPES: DISABLE
998		1634
999	void CLONE (...)	1635	void CLONE (...)
…		…
1018	void shrink (CBOR *self, int enable = 1)	1654	void shrink (CBOR *self, int enable = 1)
1019	ALIAS:	1655	ALIAS:
1020	shrink = F_SHRINK	1656	shrink = F_SHRINK
1021	allow_unknown = F_ALLOW_UNKNOWN	1657	allow_unknown = F_ALLOW_UNKNOWN
1022	allow_sharing = F_ALLOW_SHARING	1658	allow_sharing = F_ALLOW_SHARING
1023	dedup_keys = F_DEDUP_KEYS	1659	allow_cycles = F_ALLOW_CYCLES
		1660	forbid_objects = F_FORBID_OBJECTS
1024	dedup_strings = F_DEDUP_STRINGS	1661	pack_strings = F_PACK_STRINGS
		1662	text_keys = F_TEXT_KEYS
		1663	text_strings = F_TEXT_STRINGS
		1664	validate_utf8 = F_VALIDATE_UTF8
1025	PPCODE:	1665	PPCODE:
1026	{	1666	{
1027	if (enable)	1667	if (enable)
1028	self->flags |= ix;	1668	self->flags |= ix;
1029	else	1669	else
…		…
1035	void get_shrink (CBOR *self)	1675	void get_shrink (CBOR *self)
1036	ALIAS:	1676	ALIAS:
1037	get_shrink = F_SHRINK	1677	get_shrink = F_SHRINK
1038	get_allow_unknown = F_ALLOW_UNKNOWN	1678	get_allow_unknown = F_ALLOW_UNKNOWN
1039	get_allow_sharing = F_ALLOW_SHARING	1679	get_allow_sharing = F_ALLOW_SHARING
1040	get_dedup_keys = F_DEDUP_KEYS	1680	get_allow_cycles = F_ALLOW_CYCLES
		1681	get_forbid_objects = F_FORBID_OBJECTS
1041	get_dedup_strings = F_DEDUP_STRINGS	1682	get_pack_strings = F_PACK_STRINGS
		1683	get_text_keys = F_TEXT_KEYS
		1684	get_text_strings = F_TEXT_STRINGS
		1685	get_validate_utf8 = F_VALIDATE_UTF8
1042	PPCODE:	1686	PPCODE:
1043	XPUSHs (boolSV (self->flags & ix));	1687	XPUSHs (boolSV (self->flags & ix));
1044		1688
1045	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1689	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
1046	PPCODE:	1690	PPCODE:
…		…
1059	XPUSHs (ST (0));	1703	XPUSHs (ST (0));
1060		1704
1061	int get_max_size (CBOR *self)	1705	int get_max_size (CBOR *self)
1062	CODE:	1706	CODE:
1063	RETVAL = self->max_size;	1707	RETVAL = self->max_size;
		1708	OUTPUT:
		1709	RETVAL
		1710
		1711	void filter (CBOR *self, SV *filter = 0)
		1712	PPCODE:
		1713	SvREFCNT_dec (self->filter);
		1714	self->filter = filter ? newSVsv (filter) : filter;
		1715	XPUSHs (ST (0));
		1716
		1717	SV *get_filter (CBOR *self)
		1718	CODE:
		1719	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
1064	OUTPUT:	1720	OUTPUT:
1065	RETVAL	1721	RETVAL
1066		1722
1067	void encode (CBOR *self, SV *scalar)	1723	void encode (CBOR *self, SV *scalar)
1068	PPCODE:	1724	PPCODE:
…		…
1083	EXTEND (SP, 2);	1739	EXTEND (SP, 2);
1084	PUSHs (sv);	1740	PUSHs (sv);
1085	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1741	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
1086	}	1742	}
1087		1743
		1744	void incr_parse (CBOR *self, SV *cborstr)
		1745	ALIAS:
		1746	incr_parse_multiple = 1
		1747	PPCODE:
		1748	{
		1749	if (SvUTF8 (cborstr))
		1750	sv_utf8_downgrade (cborstr, 0);
		1751
		1752	if (!self->incr_count)
		1753	{
		1754	self->incr_count = newAV ();
		1755	self->incr_pos = 0;
		1756	self->incr_need = 1;
		1757
		1758	av_push (self->incr_count, newSViv (1));
		1759	}
		1760
		1761	do
		1762	{
		1763	if (!incr_parse (self, cborstr))
		1764	{
		1765	if (self->incr_need > self->max_size && self->max_size)
		1766	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1767	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1768
		1769	break;
		1770	}
		1771
		1772	SV *sv;
		1773	char *offset;
		1774
		1775	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1776	XPUSHs (sv);
		1777
		1778	sv_chop (cborstr, offset);
		1779
		1780	av_clear (self->incr_count);
		1781	av_push (self->incr_count, newSViv (1));
		1782
		1783	self->incr_pos = 0;
		1784	self->incr_need = self->incr_pos + 1;
		1785	}
		1786	while (ix);
		1787	}
		1788
		1789	void incr_reset (CBOR *self)
		1790	CODE:
		1791	{
		1792	SvREFCNT_dec (self->incr_count);
		1793	self->incr_count = 0;
		1794	}
		1795
		1796	void DESTROY (CBOR *self)
		1797	PPCODE:
		1798	cbor_free (self);
		1799
1088	PROTOTYPES: ENABLE	1800	PROTOTYPES: ENABLE
1089		1801
1090	void encode_cbor (SV *scalar)	1802	void encode_cbor (SV *scalar)
		1803	ALIAS:
		1804	encode_cbor = 0
		1805	encode_cbor_sharing = F_ALLOW_SHARING
1091	PPCODE:	1806	PPCODE:
1092	{	1807	{
1093	CBOR cbor;	1808	CBOR cbor;
1094	cbor_init (&cbor);	1809	cbor_init (&cbor);
		1810	cbor.flags |= ix;
1095	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1811	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
1096	XPUSHs (scalar);	1812	XPUSHs (scalar);
1097	}	1813	}
1098		1814
1099	void decode_cbor (SV *cborstr)	1815	void decode_cbor (SV *cborstr)
…		…
1103	cbor_init (&cbor);	1819	cbor_init (&cbor);
1104	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1820	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1105	XPUSHs (cborstr);	1821	XPUSHs (cborstr);
1106	}	1822	}
1107		1823
		1824	#ifdef __AFL_COMPILER
		1825
		1826	void
		1827	afl_init ()
		1828	CODE:
		1829	__AFL_INIT ();
		1830
		1831	int
		1832	afl_loop (unsigned int count = 10000)
		1833	CODE:
		1834	RETVAL = __AFL_LOOP (count);
		1835	OUTPUT:
		1836	RETVAL
		1837
		1838	#endif
		1839

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