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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.9 by root, Sun Oct 27 10:17:12 2013 UTC vs.
Revision 1.70 by root, Fri Dec 4 02:57:14 2020 UTC

…		…
6	#include <string.h>	6	#include <string.h>
7	#include <stdlib.h>	7	#include <stdlib.h>
8	#include <stdio.h>	8	#include <stdio.h>
9	#include <limits.h>	9	#include <limits.h>
10	#include <float.h>	10	#include <float.h>
		11	#include <inttypes.h>
11		12
		13	#define ECB_NO_THREADS 1
12	#include "ecb.h"	14	#include "ecb.h"
		15
		16	// compatibility with perl <5.18
		17	#ifndef HvNAMELEN_get
		18	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		19	#endif
		20	#ifndef HvNAMELEN
		21	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		22	#endif
		23	#ifndef HvNAMEUTF8
		24	# define HvNAMEUTF8(hv) 0
		25	#endif
		26	#ifndef SvREFCNT_inc_NN
		27	# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
		28	#endif
		29	#ifndef SvREFCNT_dec_NN
		30	# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
		31	#endif
		32
		33	// known major and minor types
		34	enum cbor_type
		35	{
		36	MAJOR_SHIFT = 5,
		37	MINOR_MASK = 0x1f,
		38
		39	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		40	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		41	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		42	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		43	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		44	MAJOR_MAP = 5 << MAJOR_SHIFT,
		45	MAJOR_TAG = 6 << MAJOR_SHIFT,
		46	MAJOR_MISC = 7 << MAJOR_SHIFT,
		47
		48	// INT/STRING/ARRAY/MAP subtypes
		49	LENGTH_EXT1 = 24,
		50	LENGTH_EXT2 = 25,
		51	LENGTH_EXT4 = 26,
		52	LENGTH_EXT8 = 27,
		53
		54	// SIMPLE types (effectively MISC subtypes)
		55	SIMPLE_FALSE = 20,
		56	SIMPLE_TRUE = 21,
		57	SIMPLE_NULL = 22,
		58	SIMPLE_UNDEF = 23,
		59
		60	// MISC subtype (unused)
		61	MISC_EXT1 = 24,
		62	MISC_FLOAT16 = 25,
		63	MISC_FLOAT32 = 26,
		64	MISC_FLOAT64 = 27,
		65
		66	// BYTES/TEXT/ARRAY/MAP
		67	MINOR_INDEF = 31,
		68	};
13		69
14	// known tags	70	// known tags
15	enum cbor_tag	71	enum cbor_tag
16	{	72	{
17	// inofficial extensions (pending iana registration)	73	// extensions
18	CBOR_TAG_PERL_OBJECT = 256,	74	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
19	CBOR_TAG_GENERIC_OBJECT = 257,	75	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
		76	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
		77	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
		78	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
		79	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
		80	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
20		81
21	// rfc7049	82	// rfc7049
22	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	83	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
23	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	84	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
24	CBOR_TAG_POS_BIGNUM = 2, // byte string	85	CBOR_TAG_POS_BIGNUM = 2, // byte string
25	CBOR_TAG_NEG_BIGNUM = 3, // byte string	86	CBOR_TAG_NEG_BIGNUM = 3, // byte string
26	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	87	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
27	CBOR_TAG_BIGFLOAT = 5, // array	88	CBOR_TAG_BIGFLOAT = 5, // array
28		89
29	CBOR_TAG_CONV_B64U = 21, // base64url, any	90	CBOR_TAG_CONV_B64U = 21, // base64url, any
30	CBOR_TAG_CONV_B64 = 22, // base64, any	91	CBOR_TAG_CONV_B64 = 22, // base64, any
31	CBOR_TAG_CONV_HEX = 23, // base16, any	92	CBOR_TAG_CONV_HEX = 23, // base16, any
32	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	93	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
33		94
34	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	95	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
35	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	96	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
36	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	97	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
37	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	98	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
38	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	99	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
39		100
40	CBOR_TAG_MAGIC = 55799 // self-describe cbor	101	CBOR_TAG_MAGIC = 55799, // self-describe cbor
41	};	102	};
42		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
43	#define F_SHRINK 0x00000200UL	118	#define F_SHRINK 0x00000001UL
44	#define F_ALLOW_UNKNOWN 0x00002000UL	119	#define F_ALLOW_UNKNOWN 0x00000002UL
		120	#define F_ALLOW_SHARING 0x00000004UL
		121	#define F_ALLOW_CYCLES 0x00000008UL
		122	#define F_FORBID_OBJECTS 0x00000010UL
		123	#define F_PACK_STRINGS 0x00000020UL
		124	#define F_TEXT_KEYS 0x00000040UL
		125	#define F_TEXT_STRINGS 0x00000080UL
		126	#define F_VALIDATE_UTF8 0x00000100UL
45		127
46	#define INIT_SIZE 32 // initial scalar size to be allocated	128	#define INIT_SIZE 32 // initial scalar size to be allocated
47		129
48	#define SB do {	130	#define SB do {
49	#define SE } while (0)	131	#define SE } while (0)
…		…
60	#else	142	#else
61	# define CBOR_SLOW 0	143	# define CBOR_SLOW 0
62	# define CBOR_STASH cbor_stash	144	# define CBOR_STASH cbor_stash
63	#endif	145	#endif
64		146
65	static HV *cbor_stash, *cbor_boolean_stash, *cbor_tagged_stash; // CBOR::XS::	147	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
66	static SV *cbor_true, *cbor_false;	148	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
67		149
68	typedef struct {	150	typedef struct {
69	U32 flags;	151	U32 flags;
70	U32 max_depth;	152	U32 max_depth;
71	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.
72	} CBOR;	160	} CBOR;
73		161
74	ecb_inline void	162	ecb_inline void
75	cbor_init (CBOR *cbor)	163	cbor_init (CBOR *cbor)
76	{	164	{
77	Zero (cbor, 1, CBOR);	165	Zero (cbor, 1, CBOR);
78	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);
79	}	174	}
80		175
81	/////////////////////////////////////////////////////////////////////////////	176	/////////////////////////////////////////////////////////////////////////////
82	// utility functions	177	// utility functions
83		178
…		…
105	SvPV_renew (sv, SvCUR (sv) + 1);	200	SvPV_renew (sv, SvCUR (sv) + 1);
106	#endif	201	#endif
107	}	202	}
108	}	203	}
109		204
110	/////////////////////////////////////////////////////////////////////////////	205	// minimum length of a string to be registered for stringref
111	// fp hell	206	ecb_inline int
112		207	minimum_string_length (UV idx)
113	//TODO	208	{
		209	return idx <= 23 ? 3
		210	: idx <= 0xffU ? 4
		211	: idx <= 0xffffU ? 5
		212	: idx <= 0xffffffffU ? 7
		213	: 11;
		214	}
114		215
115	/////////////////////////////////////////////////////////////////////////////	216	/////////////////////////////////////////////////////////////////////////////
116	// encoder	217	// encoder
117		218
118	// structure used for encoding CBOR	219	// structure used for encoding CBOR
…		…
121	char *cur; // SvPVX (sv) + current output position	222	char *cur; // SvPVX (sv) + current output position
122	char *end; // SvEND (sv)	223	char *end; // SvEND (sv)
123	SV *sv; // result scalar	224	SV *sv; // result scalar
124	CBOR cbor;	225	CBOR cbor;
125	U32 depth; // recursion level	226	U32 depth; // recursion level
		227	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		228	UV stringref_idx;
		229	HV *shareable; // ptr => index, or 0
		230	UV shareable_idx;
126	} enc_t;	231	} enc_t;
127		232
128	ecb_inline void	233	ecb_inline void
129	need (enc_t *enc, STRLEN len)	234	need (enc_t *enc, STRLEN len)
130	{	235	{
131	if (ecb_expect_false (enc->cur + len >= enc->end))	236	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
132	{	237	{
133	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	238	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
134	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	239	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
135	enc->cur = SvPVX (enc->sv) + cur;	240	enc->cur = SvPVX (enc->sv) + cur;
136	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	241	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
137	}	242	}
138	}	243	}
139		244
		245	static void encode_sv (enc_t *enc, SV *sv);
		246
140	ecb_inline void	247	ecb_inline void
141	encode_ch (enc_t *enc, char ch)	248	encode_ch (enc_t *enc, char ch)
142	{	249	{
143	need (enc, 1);	250	need (enc, 1);
144	*enc->cur++ = ch;	251	*enc->cur++ = ch;
145	}	252	}
146		253
		254	// used for tags, intregers, element counts and so on
147	static void	255	static void
148	encode_uint (enc_t *enc, int major, UV len)	256	encode_uint (enc_t *enc, int major, UV len)
149	{	257	{
150	need (enc, 9);	258	need (enc, 9);
151		259
152	if (len < 24)	260	if (ecb_expect_true (len < LENGTH_EXT1))
153	*enc->cur++ = major | len;	261	*enc->cur++ = major | len;
154	else if (len <= 0xff)	262	else if (ecb_expect_true (len <= 0xffU))
155	{	263	{
156	*enc->cur++ = major | 24;	264	*enc->cur++ = major | LENGTH_EXT1;
157	*enc->cur++ = len;	265	*enc->cur++ = len;
158	}	266	}
159	else if (len <= 0xffff)	267	else if (len <= 0xffffU)
160	{	268	{
161	*enc->cur++ = major | 25;	269	*enc->cur++ = major | LENGTH_EXT2;
162	*enc->cur++ = len >> 8;	270	*enc->cur++ = len >> 8;
163	*enc->cur++ = len;	271	*enc->cur++ = len;
164	}	272	}
165	else if (len <= 0xffffffff)	273	else if (len <= 0xffffffffU)
166	{	274	{
167	*enc->cur++ = major | 26;	275	*enc->cur++ = major | LENGTH_EXT4;
168	*enc->cur++ = len >> 24;	276	*enc->cur++ = len >> 24;
169	*enc->cur++ = len >> 16;	277	*enc->cur++ = len >> 16;
170	*enc->cur++ = len >> 8;	278	*enc->cur++ = len >> 8;
171	*enc->cur++ = len;	279	*enc->cur++ = len;
172	}	280	}
173	else	281	else
174	{	282	{
175	*enc->cur++ = major | 27;	283	*enc->cur++ = major | LENGTH_EXT8;
176	*enc->cur++ = len >> 56;	284	*enc->cur++ = len >> 56;
177	*enc->cur++ = len >> 48;	285	*enc->cur++ = len >> 48;
178	*enc->cur++ = len >> 40;	286	*enc->cur++ = len >> 40;
179	*enc->cur++ = len >> 32;	287	*enc->cur++ = len >> 32;
180	*enc->cur++ = len >> 24;	288	*enc->cur++ = len >> 24;
…		…
182	*enc->cur++ = len >> 8;	290	*enc->cur++ = len >> 8;
183	*enc->cur++ = len;	291	*enc->cur++ = len;
184	}	292	}
185	}	293	}
186		294
187	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
188	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	315	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
189	{	316	{
190	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);
191	need (enc, len);	347	need (enc, len);
192	memcpy (enc->cur, str, len);	348	memcpy (enc->cur, str, len);
193	enc->cur += len;	349	enc->cur += len;
194	}	350	}
195		351
196	static void encode_sv (enc_t *enc, SV *sv);	352	ecb_inline void
		353	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		354	{
		355	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		356	{
		357	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		358
		359	if (SvOK (*svp))
		360	{
		361	// already registered, use stringref
		362	encode_tag (enc, CBOR_TAG_STRINGREF);
		363	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		364	return;
		365	}
		366	else if (len >= minimum_string_length (enc->stringref_idx))
		367	{
		368	// register only
		369	sv_setuv (*svp, enc->stringref_idx);
		370	++enc->stringref_idx;
		371	}
		372	}
		373
		374	encode_str (enc, upgrade_utf8, utf8, str, len);
		375	}
		376
		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
		433	encode_array_as_map (enc_t *enc, SV *sv)
		434	{
		435	if (enc->depth >= enc->cbor.max_depth)
		436	croak (ERR_NESTING_EXCEEDED);
		437
		438	++enc->depth;
		439
		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	}
197		507
198	static void	508	static void
199	encode_av (enc_t *enc, AV *av)	509	encode_av (enc_t *enc, AV *av)
200	{	510	{
201	int i, len = av_len (av);	511	int i, len = av_len (av);
…		…
203	if (enc->depth >= enc->cbor.max_depth)	513	if (enc->depth >= enc->cbor.max_depth)
204	croak (ERR_NESTING_EXCEEDED);	514	croak (ERR_NESTING_EXCEEDED);
205		515
206	++enc->depth;	516	++enc->depth;
207		517
208	encode_uint (enc, 0x80, len + 1);	518	encode_uint (enc, MAJOR_ARRAY, len + 1);
209		519
		520	if (ecb_expect_false (SvMAGICAL (av)))
210	for (i = 0; i <= len; ++i)	521	for (i = 0; i <= len; ++i)
211	{	522	{
212	SV **svp = av_fetch (av, i, 0);	523	SV **svp = av_fetch (av, i, 0);
213	encode_sv (enc, svp ? *svp : &PL_sv_undef);	524	encode_sv (enc, svp ? *svp : &PL_sv_undef);
214	}	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	}
215		532
216	--enc->depth;	533	--enc->depth;
217	}	534	}
218		535
219	static void	536	static void
…		…
227	++enc->depth;	544	++enc->depth;
228		545
229	int pairs = hv_iterinit (hv);	546	int pairs = hv_iterinit (hv);
230	int mg = SvMAGICAL (hv);	547	int mg = SvMAGICAL (hv);
231		548
232	if (mg)	549	if (ecb_expect_false (mg))
233	encode_ch (enc, 0xa0 | 31);	550	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
234	else	551	else
235	encode_uint (enc, 0xa0, pairs);	552	encode_uint (enc, MAJOR_MAP, pairs);
236		553
237	while ((he = hv_iternext (hv)))	554	while ((he = hv_iternext (hv)))
238	{	555	{
239	if (HeKLEN (he) == HEf_SVKEY)	556	if (HeKLEN (he) == HEf_SVKEY)
240	encode_sv (enc, HeSVKEY (he));	557	encode_sv (enc, HeSVKEY (he));
241	else	558	else
242	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));
243		560
244	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));
245	}	562	}
246		563
247	if (mg)	564	if (ecb_expect_false (mg))
248	encode_ch (enc, 0xe0 | 31);	565	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
249		566
250	--enc->depth;	567	--enc->depth;
251	}	568	}
252		569
253	// encode objects, arrays and special \0=false and \1=true values.	570	// encode objects, arrays and special \0=false and \1=true values.
254	static void	571	static void
255	encode_rv (enc_t *enc, SV *sv)	572	encode_rv (enc_t *enc, SV *sv)
256	{	573	{
257	svtype svt;
258
259	SvGETMAGIC (sv);	574	SvGETMAGIC (sv);
		575
260	svt = SvTYPE (sv);	576	svtype svt = SvTYPE (sv);
261		577
262	if (ecb_expect_false (SvOBJECT (sv)))	578	if (ecb_expect_false (SvOBJECT (sv)))
263	{	579	{
264	HV *boolean_stash = !CBOR_SLOW || cbor_boolean_stash	580	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
265	? cbor_boolean_stash	581	? types_boolean_stash
266	: gv_stashpv ("CBOR::XS::Boolean", 1);	582	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		583	HV *error_stash = !CBOR_SLOW || types_error_stash
		584	? types_error_stash
		585	: gv_stashpv ("Types::Serialiser::Error", 1);
267	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	586	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
268	? cbor_tagged_stash	587	? cbor_tagged_stash
269	: gv_stashpv ("CBOR::XS::Tagged" , 1);	588	: gv_stashpv ("CBOR::XS::Tagged" , 1);
270		589
		590	HV *stash = SvSTASH (sv);
		591
271	if (SvSTASH (sv) == boolean_stash)	592	if (stash == boolean_stash)
272	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	593	{
		594	encode_bool (enc, SvIV (sv));
		595	return;
		596	}
		597	else if (stash == error_stash)
		598	{
		599	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		600	return;
		601	}
273	else if (SvSTASH (sv) == tagged_stash)	602	else if (stash == tagged_stash)
274	{	603	{
275	if (svt != SVt_PVAV)	604	if (svt != SVt_PVAV)
276	croak ("encountered CBOR::XS::Tagged object that isn't an array");	605	croak ("encountered CBOR::XS::Tagged object that isn't an array");
277		606
		607	switch (av_len ((AV *)sv))
		608	{
		609	case 2-1:
		610	// actually a tagged value
278	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	611	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
279	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))
		637	{
		638	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		639	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		640	return;
280	}	641	}
281	else	642	else
282	{	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))));
		658	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
		659	{
		660	dSP;
		661
		662	ENTER; SAVETMPS;
		663	PUSHMARK (SP);
283	// 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
284	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
285
286	if (to_cbor)
287	{
288	dSP;
289
290	ENTER; SAVETMPS; PUSHMARK (SP);
291	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	665	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
292		666
293	// calling with G_SCALAR ensures that we always get a 1 return value
294	PUTBACK;	667	PUTBACK;
		668	// G_SCALAR ensures that return value is 1
295	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	669	call_sv ((SV *)GvCV (method), G_SCALAR);
296	SPAGAIN;	670	SPAGAIN;
297		671
298	// catch this surprisingly common error	672	// catch this surprisingly common error
299	if (SvROK (TOPs) && SvRV (TOPs) == sv)	673	if (SvROK (TOPs) && SvRV (TOPs) == sv)
300	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	674	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
301		675
302	sv = POPs;	676	encode_sv (enc, POPs);
		677
303	PUTBACK;	678	PUTBACK;
304		679
305	encode_sv (enc, sv);
306
307	FREETMPS; LEAVE;	680	FREETMPS; LEAVE;
		681	}
		682	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
		683	{
		684	dSP;
		685
		686	ENTER; SAVETMPS;
		687	PUSHMARK (SP);
		688	EXTEND (SP, 2);
		689	// we re-bless the reference to get overload and other niceties right
		690	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		691	PUSHs (sv_cbor);
		692
		693	PUTBACK;
		694	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		695	SPAGAIN;
		696
		697	// catch this surprisingly common error
		698	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		699	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		700
		701	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		702	encode_uint (enc, MAJOR_ARRAY, count + 1);
		703	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		704
		705	{
		706	int i;
		707
		708	for (i = 0; i < count; ++i)
		709	encode_sv (enc, SP[i + 1 - count]);
		710
		711	SP -= count;
308	}	712	}
		713
		714	PUTBACK;
		715
		716	FREETMPS; LEAVE;
		717	}
309	else	718	else
310	croak ("encountered object '%s', but no TO_CBOR method available on it",	719	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
311	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	720	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
312	}
313	}	721	}
314	else if (svt == SVt_PVHV)	722	else if (svt == SVt_PVHV)
315	encode_hv (enc, (HV *)sv);	723	encode_hv (enc, (HV *)sv);
316	else if (svt == SVt_PVAV)	724	else if (svt == SVt_PVAV)
317	encode_av (enc, (AV *)sv);	725	encode_av (enc, (AV *)sv);
318	else if (svt < SVt_PVAV)
319	{
320	STRLEN len = 0;
321	char *pv = svt ? SvPV (sv, len) : 0;
322
323	if (len == 1 && *pv == '1')
324	encode_ch (enc, 0xe0 | 21);
325	else if (len == 1 && *pv == '0')
326	encode_ch (enc, 0xe0 | 20);
327	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
328	encode_ch (enc, 0xe0 | 23);
329	else
330	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
331	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
332	}
333	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
334	encode_ch (enc, 0xe0 | 23);
335	else	726	else
336	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	727	{
337	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	728	encode_tag (enc, CBOR_TAG_INDIRECTION);
		729	encode_sv (enc, sv);
		730	}
338	}	731	}
339		732
340	static void	733	static void
341	encode_nv (enc_t *enc, SV *sv)	734	encode_nv (enc_t *enc, SV *sv)
342	{	735	{
343	double nv = SvNVX (sv);	736	double nv = SvNVX (sv);
344		737
345	need (enc, 9);	738	need (enc, 9);
346		739
347	if (ecb_expect_false (nv == (U32)nv))	740	if (ecb_expect_false (nv == (NV)(U32)nv))
348	encode_uint (enc, 0x00, (U32)nv);	741	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
349	//TODO: maybe I32?	742	//TODO: maybe I32?
350	else if (ecb_expect_false (nv == (float)nv))	743	else if (ecb_expect_false (nv == (float)nv))
351	{	744	encode_float32 (enc, nv);
352	uint32_t fp = ecb_float_to_binary32 (nv);
353
354	*enc->cur++ = 0xe0 | 26;
355
356	if (!ecb_big_endian ())
357	fp = ecb_bswap32 (fp);
358
359	memcpy (enc->cur, &fp, 4);
360	enc->cur += 4;
361	}
362	else	745	else
363	{	746	encode_float64 (enc, nv);
364	uint64_t fp = ecb_double_to_binary64 (nv);
365
366	*enc->cur++ = 0xe0 | 27;
367
368	if (!ecb_big_endian ())
369	fp = ecb_bswap64 (fp);
370
371	memcpy (enc->cur, &fp, 8);
372	enc->cur += 8;
373	}
374	}	747	}
375		748
376	static void	749	static void
377	encode_sv (enc_t *enc, SV *sv)	750	encode_sv (enc_t *enc, SV *sv)
378	{	751	{
…		…
380		753
381	if (SvPOKp (sv))	754	if (SvPOKp (sv))
382	{	755	{
383	STRLEN len;	756	STRLEN len;
384	char *str = SvPV (sv, len);	757	char *str = SvPV (sv, len);
385	encode_str (enc, SvUTF8 (sv), str, len);	758	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
386	}	759	}
387	else if (SvNOKp (sv))	760	else if (SvNOKp (sv))
388	encode_nv (enc, sv);	761	encode_nv (enc, sv);
389	else if (SvIOKp (sv))	762	else if (SvIOKp (sv))
390	{	763	encode_int (enc, sv);
391	if (SvIsUV (sv))
392	encode_uint (enc, 0x00, SvUVX (sv));
393	else if (SvIVX (sv) >= 0)
394	encode_uint (enc, 0x00, SvIVX (sv));
395	else
396	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
397	}
398	else if (SvROK (sv))	764	else if (SvROK (sv))
399	encode_rv (enc, SvRV (sv));	765	encode_rv (enc, SvRV (sv));
400	else if (!SvOK (sv))	766	else if (!SvOK (sv))
401	encode_ch (enc, 0xe0 | 22);	767	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
402	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	768	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
403	encode_ch (enc, 0xe0 | 23);	769	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
404	else	770	else
405	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",
406	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	772	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
407	}	773	}
408		774
409	static SV *	775	static SV *
410	encode_cbor (SV *scalar, CBOR *cbor)	776	encode_cbor (SV *scalar, CBOR *cbor)
411	{	777	{
412	enc_t enc;	778	enc_t enc = { 0 };
413		779
414	enc.cbor = *cbor;	780	enc.cbor = *cbor;
415	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	781	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
416	enc.cur = SvPVX (enc.sv);	782	enc.cur = SvPVX (enc.sv);
417	enc.end = SvEND (enc.sv);	783	enc.end = SvEND (enc.sv);
418	enc.depth = 0;
419		784
420	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
421	encode_sv (&enc, scalar);	794	encode_sv (&enc, scalar);
422		795
423	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	796	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
424	*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
425		798
…		…
439	U8 *end; // end of input string	812	U8 *end; // end of input string
440	const char *err; // parse error, if != 0	813	const char *err; // parse error, if != 0
441	CBOR cbor;	814	CBOR cbor;
442	U32 depth; // recursion depth	815	U32 depth; // recursion depth
443	U32 maxdepth; // recursion depth limit	816	U32 maxdepth; // recursion depth limit
		817	AV *shareable;
		818	AV *stringref;
		819	SV *decode_tagged;
		820	SV *err_sv; // optional sv for error, needs to be freed
444	} dec_t;	821	} dec_t;
445		822
446	#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);
447		830
448	#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;
449		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
450	#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)
451	#define DEC_DEC_DEPTH --dec->depth	860	#define DEC_DEC_DEPTH --dec->depth
452		861
453	static UV	862	static UV
454	decode_uint (dec_t *dec)	863	decode_uint (dec_t *dec)
455	{	864	{
456	switch (*dec->cur & 31)	865	U8 m = *dec->cur & MINOR_MASK;
457	{	866	++dec->cur;
458	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
459	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
460	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
461	return *dec->cur++ & 31;
462		867
463	case 24:	868	if (ecb_expect_true (m < LENGTH_EXT1))
		869	return m;
		870	else if (ecb_expect_true (m == LENGTH_EXT1))
		871	{
464	WANT (2);	872	WANT (1);
465	dec->cur += 2;	873	dec->cur += 1;
466	return dec->cur[-1];	874	return dec->cur[-1];
467		875	}
468	case 25:	876	else if (ecb_expect_true (m == LENGTH_EXT2))
		877	{
469	WANT (3);	878	WANT (2);
470	dec->cur += 3;	879	dec->cur += 2;
471	return (((UV)dec->cur[-2]) << 8)	880	return (((UV)dec->cur[-2]) << 8)
472	| ((UV)dec->cur[-1]);	881	| ((UV)dec->cur[-1]);
473		882	}
474	case 26:	883	else if (ecb_expect_true (m == LENGTH_EXT4))
		884	{
475	WANT (5);	885	WANT (4);
476	dec->cur += 5;	886	dec->cur += 4;
477	return (((UV)dec->cur[-4]) << 24)	887	return (((UV)dec->cur[-4]) << 24)
478	| (((UV)dec->cur[-3]) << 16)	888	| (((UV)dec->cur[-3]) << 16)
479	| (((UV)dec->cur[-2]) << 8)	889	| (((UV)dec->cur[-2]) << 8)
480	| ((UV)dec->cur[-1]);	890	| ((UV)dec->cur[-1]);
481		891	}
482	case 27:	892	else if (ecb_expect_true (m == LENGTH_EXT8))
		893	{
483	WANT (9);	894	WANT (8);
484	dec->cur += 9;	895	dec->cur += 8;
		896
		897	return
		898	#if UVSIZE < 8
		899	0
		900	#else
485	return (((UV)dec->cur[-8]) << 56)	901	(((UV)dec->cur[-8]) << 56)
486	| (((UV)dec->cur[-7]) << 48)	902	| (((UV)dec->cur[-7]) << 48)
487	| (((UV)dec->cur[-6]) << 40)	903	| (((UV)dec->cur[-6]) << 40)
488	| (((UV)dec->cur[-5]) << 32)	904	| (((UV)dec->cur[-5]) << 32)
		905	#endif
489	| (((UV)dec->cur[-4]) << 24)	906	| (((UV)dec->cur[-4]) << 24)
490	| (((UV)dec->cur[-3]) << 16)	907	| (((UV)dec->cur[-3]) << 16)
491	| (((UV)dec->cur[-2]) << 8)	908	| (((UV)dec->cur[-2]) << 8)
492	| ((UV)dec->cur[-1]);	909	| ((UV)dec->cur[-1]);
493		910	}
494	default:	911	else
495	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	912	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
496	}
497		913
498	fail:	914	fail:
499	return 0;	915	return 0;
500	}	916	}
501		917
…		…
506	{	922	{
507	AV *av = newAV ();	923	AV *av = newAV ();
508		924
509	DEC_INC_DEPTH;	925	DEC_INC_DEPTH;
510		926
511	if ((*dec->cur & 31) == 31)	927	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
512	{	928	{
513	++dec->cur;	929	++dec->cur;
514		930
515	for (;;)	931	for (;;)
516	{	932	{
517	WANT (1);	933	WANT (1);
518		934
519	if (*dec->cur == (0xe0 | 31))	935	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
520	{	936	{
521	++dec->cur;	937	++dec->cur;
522	break;	938	break;
523	}	939	}
524		940
525	av_push (av, decode_sv (dec));	941	av_push (av, decode_sv (dec));
526	}	942	}
527	}	943	}
528	else	944	else
529	{	945	{
530	int i, len = decode_uint (dec);	946	UV i, len = decode_uint (dec);
531		947
		948	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
532	av_fill (av, len - 1);	949	av_fill (av, len - 1);
533		950
534	for (i = 0; i < len; ++i)	951	for (i = 0; i < len; ++i)
535	AvARRAY (av)[i] = decode_sv (dec);	952	AvARRAY (av)[i] = decode_sv (dec);
536	}	953	}
537		954
538	DEC_DEC_DEPTH;	955	DEC_DEC_DEPTH;
539	return newRV_noinc ((SV *)av);	956	return newRV_noinc ((SV *)av);
540		957
541	fail:	958	fail:
542	SvREFCNT_dec (av);	959	SvREFCNT_dec_NN (av);
543	DEC_DEC_DEPTH;	960	DEC_DEC_DEPTH;
544	return &PL_sv_undef;	961	return &PL_sv_undef;
545	}	962	}
546		963
		964	static void
		965	decode_he (dec_t *dec, HV *hv)
		966	{
		967	// for speed reasons, we specialcase single-string
		968	// byte or utf-8 strings as keys, but only when !stringref
		969
		970	if (ecb_expect_true (!dec->stringref))
		971	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		972	{
		973	STRLEN len = decode_uint (dec);
		974	char *key = (char *)dec->cur;
		975
		976	WANT (len);
		977	dec->cur += len;
		978
		979	hv_store (hv, key, len, decode_sv (dec), 0);
		980
		981	return;
		982	}
		983	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		984	{
		985	STRLEN len = decode_uint (dec);
		986	char *key = (char *)dec->cur;
		987
		988	WANT (len);
		989	dec->cur += len;
		990
		991	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		992	if (!is_utf8_string (key, len))
		993	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		994
		995	hv_store (hv, key, -len, decode_sv (dec), 0);
		996
		997	return;
		998	}
		999
		1000	SV *k = decode_sv (dec);
		1001	SV *v = decode_sv (dec);
		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
		1031	hv_store_ent (hv, k, v, 0);
		1032	SvREFCNT_dec_NN (k);
		1033
		1034	fail:
		1035	;
		1036	}
		1037
547	static SV *	1038	static SV *
548	decode_hv (dec_t *dec)	1039	decode_hv (dec_t *dec)
549	{	1040	{
550	HV *hv = newHV ();	1041	HV *hv = newHV ();
551		1042
552	DEC_INC_DEPTH;	1043	DEC_INC_DEPTH;
553		1044
554	if ((*dec->cur & 31) == 31)	1045	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
555	{	1046	{
556	++dec->cur;	1047	++dec->cur;
557		1048
558	for (;;)	1049	for (;;)
559	{	1050	{
560	WANT (1);	1051	WANT (1);
561		1052
562	if (*dec->cur == (0xe0 | 31))	1053	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
563	{	1054	{
564	++dec->cur;	1055	++dec->cur;
565	break;	1056	break;
566	}	1057	}
567		1058
568	SV *k = decode_sv (dec);	1059	decode_he (dec, hv);
569	SV *v = decode_sv (dec);
570
571	hv_store_ent (hv, k, v, 0);
572	}	1060	}
573	}	1061	}
574	else	1062	else
575	{	1063	{
576	int len = decode_uint (dec);	1064	UV pairs = decode_uint (dec);
577		1065
		1066	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1067
578	while (len--)	1068	while (pairs--)
579	{	1069	decode_he (dec, hv);
580	SV *k = decode_sv (dec);
581	SV *v = decode_sv (dec);
582
583	hv_store_ent (hv, k, v, 0);
584	}
585	}	1070	}
586		1071
587	DEC_DEC_DEPTH;	1072	DEC_DEC_DEPTH;
588	return newRV_noinc ((SV *)hv);	1073	return newRV_noinc ((SV *)hv);
589		1074
590	fail:	1075	fail:
591	SvREFCNT_dec (hv);	1076	SvREFCNT_dec_NN (hv);
592	DEC_DEC_DEPTH;	1077	DEC_DEC_DEPTH;
593	return &PL_sv_undef;	1078	return &PL_sv_undef;
594	}	1079	}
595		1080
596	static SV *	1081	static SV *
597	decode_str (dec_t *dec, int utf8)	1082	decode_str (dec_t *dec, int utf8)
598	{	1083	{
599	SV *sv = 0;	1084	SV *sv = 0;
600		1085
601	if ((*dec->cur & 31) == 31)	1086	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
602	{	1087	{
		1088	// indefinite length strings
603	++dec->cur;	1089	++dec->cur;
604		1090
		1091	U8 major = *dec->cur & MAJOR_MISC;
		1092
605	sv = newSVpvn ("", 0);	1093	sv = newSVpvn ("", 0);
606		1094
607	// not very fast, and certainly not robust against illegal input
608	for (;;)	1095	for (;;)
609	{	1096	{
610	WANT (1);	1097	WANT (1);
611		1098
612	if (*dec->cur == (0xe0 | 31))	1099	if ((*dec->cur - major) > LENGTH_EXT8)
		1100	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
613	{	1101	{
614	++dec->cur;	1102	++dec->cur;
615	break;	1103	break;
616	}	1104	}
		1105	else
		1106	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
617		1107
618	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;
619	}	1113	}
620	}	1114	}
621	else	1115	else
622	{	1116	{
623	STRLEN len = decode_uint (dec);	1117	STRLEN len = decode_uint (dec);
624		1118
625	WANT (len);	1119	WANT (len);
626	sv = newSVpvn (dec->cur, len);	1120	sv = newSVpvn (dec->cur, len);
627	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));
628	}	1126	}
629		1127
630	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
631	SvUTF8_on (sv);	1134	SvUTF8_on (sv);
		1135	}
632		1136
633	return sv;	1137	return sv;
634		1138
635	fail:	1139	fail:
636	SvREFCNT_dec (sv);	1140	SvREFCNT_dec (sv);
…		…
638	}	1142	}
639		1143
640	static SV *	1144	static SV *
641	decode_tagged (dec_t *dec)	1145	decode_tagged (dec_t *dec)
642	{	1146	{
		1147	SV *sv = 0;
643	UV tag = decode_uint (dec);	1148	UV tag = decode_uint (dec);
		1149
		1150	WANT (1);
		1151
		1152	switch (tag)
		1153	{
		1154	case CBOR_TAG_MAGIC:
644	SV *sv = decode_sv (dec);	1155	sv = decode_sv (dec);
		1156	break;
645		1157
646	if (tag == CBOR_TAG_MAGIC)	1158	case CBOR_TAG_INDIRECTION:
647	return sv;	1159	sv = newRV_noinc (decode_sv (dec));
		1160	break;
648		1161
649	if (tag == CBOR_TAG_PERL_OBJECT)	1162	case CBOR_TAG_STRINGREF_NAMESPACE:
650	{	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
		1191	case CBOR_TAG_VALUE_SHAREABLE:
		1192	{
		1193	if (ecb_expect_false (!dec->shareable))
		1194	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1195
		1196	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1197	{
		1198	sv = newSV (0);
		1199	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1200
		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;
		1214
		1215	case CBOR_TAG_VALUE_SHAREDREF:
		1216	{
		1217	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1218	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1219
		1220	UV idx = decode_uint (dec);
		1221
		1222	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
		1223	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1224
		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");
		1229	}
		1230	break;
		1231
		1232	case CBOR_TAG_PERL_OBJECT:
		1233	{
		1234	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1235	goto filter;
		1236
		1237	sv = decode_sv (dec);
		1238
651	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)	1239	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
652	ERR ("corrupted CBOR data (non-array perl object)");	1240	ERR ("corrupted CBOR data (non-array perl object)");
		1241
		1242	AV *av = (AV *)SvRV (sv);
		1243	int len = av_len (av) + 1;
		1244	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1245
		1246	if (!stash)
		1247	ERR ("cannot decode perl-object (package does not exist)");
		1248
		1249	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1250
		1251	if (!method)
		1252	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1253
		1254	dSP;
		1255
		1256	ENTER; SAVETMPS;
		1257	PUSHMARK (SP);
		1258	EXTEND (SP, len + 1);
		1259	// we re-bless the reference to get overload and other niceties right
		1260	PUSHs (*av_fetch (av, 0, 1));
		1261	PUSHs (sv_cbor);
		1262
		1263	int i;
		1264
		1265	for (i = 1; i < len; ++i)
		1266	PUSHs (*av_fetch (av, i, 1));
		1267
		1268	PUTBACK;
		1269	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1270	SPAGAIN;
		1271
		1272	if (SvTRUE (ERRSV))
		1273	{
		1274	FREETMPS; LEAVE;
		1275	ERR_ERRSV;
		1276	}
		1277
		1278	SvREFCNT_dec_NN (sv);
		1279	sv = SvREFCNT_inc (POPs);
		1280
		1281	PUTBACK;
		1282
		1283	FREETMPS; LEAVE;
653		1284	}
654	// TODO	1285	break;
655	}
656		1286
		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))
		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	{
657	AV *av = newAV ();	1321	AV *av = newAV ();
658	av_push (av, newSVuv (tag));	1322	av_push (av, tag_sv);
659	av_push (av, sv);	1323	av_push (av, sv);
660		1324
661	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	1325	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
662	? cbor_tagged_stash	1326	? cbor_tagged_stash
663	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1327	: gv_stashpv ("CBOR::XS::Tagged" , 1);
664
665	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);	1328	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1329	}
		1330
		1331	PUTBACK;
		1332
		1333	FREETMPS; LEAVE;
		1334	}
		1335	break;
		1336	}
		1337
		1338	return sv;
666		1339
667	fail:	1340	fail:
668	SvREFCNT_dec (sv);	1341	SvREFCNT_dec (sv);
669	return &PL_sv_undef;	1342	return &PL_sv_undef;
670	}	1343	}
…		…
672	static SV *	1345	static SV *
673	decode_sv (dec_t *dec)	1346	decode_sv (dec_t *dec)
674	{	1347	{
675	WANT (1);	1348	WANT (1);
676		1349
677	switch (*dec->cur >> 5)	1350	switch (*dec->cur >> MAJOR_SHIFT)
678	{	1351	{
679	case 0: // unsigned int	1352	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
680	return newSVuv (decode_uint (dec));	1353	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
681	case 1: // negative int	1354	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
682	return newSViv (-1 - (IV)decode_uint (dec));	1355	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
683	case 2: // octet string	1356	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
684	return decode_str (dec, 0);	1357	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
685	case 3: // utf-8 string	1358	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
686	return decode_str (dec, 1);	1359
687	case 4: // array	1360	case MAJOR_MISC >> MAJOR_SHIFT:
688	return decode_av (dec);
689	case 5: // map
690	return decode_hv (dec);
691	case 6: // tag
692	return decode_tagged (dec);
693	case 7: // misc
694	switch (*dec->cur++ & 31)	1361	switch (*dec->cur++ & MINOR_MASK)
695	{	1362	{
696	case 20:	1363	case SIMPLE_FALSE:
697	#if CBOR_SLOW	1364	#if CBOR_SLOW
698	cbor_false = get_bool ("CBOR::XS::false");	1365	types_false = get_bool ("Types::Serialiser::false");
699	#endif	1366	#endif
700	return newSVsv (cbor_false);	1367	return newSVsv (types_false);
701	case 21:	1368	case SIMPLE_TRUE:
702	#if CBOR_SLOW	1369	#if CBOR_SLOW
703	cbor_true = get_bool ("CBOR::XS::true");	1370	types_true = get_bool ("Types::Serialiser::true");
704	#endif	1371	#endif
705	return newSVsv (cbor_true);	1372	return newSVsv (types_true);
706	case 22:	1373	case SIMPLE_NULL:
707	return newSVsv (&PL_sv_undef);	1374	return newSVsv (&PL_sv_undef);
		1375	case SIMPLE_UNDEF:
		1376	#if CBOR_SLOW
		1377	types_error = get_bool ("Types::Serialiser::error");
		1378	#endif
		1379	return newSVsv (types_error);
708		1380
709	case 25:	1381	case MISC_FLOAT16:
710	{	1382	{
711	WANT (2);	1383	WANT (2);
712		1384
713	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1385	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
714	dec->cur += 2;	1386	dec->cur += 2;
715		1387
716	return newSVnv (ecb_binary16_to_float (fp));	1388	return newSVnv (ecb_binary16_to_float (fp));
717	}	1389	}
718		1390
719	case 26:	1391	case MISC_FLOAT32:
720	{	1392	{
721	uint32_t fp;	1393	uint32_t fp;
722	WANT (4);	1394	WANT (4);
723	memcpy (&fp, dec->cur, 4);	1395	memcpy (&fp, dec->cur, 4);
724	dec->cur += 4;	1396	dec->cur += 4;
…		…
727	fp = ecb_bswap32 (fp);	1399	fp = ecb_bswap32 (fp);
728		1400
729	return newSVnv (ecb_binary32_to_float (fp));	1401	return newSVnv (ecb_binary32_to_float (fp));
730	}	1402	}
731		1403
732	case 27:	1404	case MISC_FLOAT64:
733	{	1405	{
734	uint64_t fp;	1406	uint64_t fp;
735	WANT (8);	1407	WANT (8);
736	memcpy (&fp, dec->cur, 8);	1408	memcpy (&fp, dec->cur, 8);
737	dec->cur += 8;	1409	dec->cur += 8;
…		…
740	fp = ecb_bswap64 (fp);	1412	fp = ecb_bswap64 (fp);
741		1413
742	return newSVnv (ecb_binary64_to_double (fp));	1414	return newSVnv (ecb_binary64_to_double (fp));
743	}	1415	}
744		1416
745	// 0..19 unassigned	1417	// 0..19 unassigned simple
746	// 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
747	default:	1421	default:
748	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1422	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
749	}	1423	}
750		1424
751	break;	1425	break;
752	}	1426	}
753		1427
…		…
756	}	1430	}
757		1431
758	static SV *	1432	static SV *
759	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1433	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
760	{	1434	{
761	dec_t dec;	1435	dec_t dec = { 0 };
762	SV *sv;	1436	SV *sv;
		1437	STRLEN len;
		1438	char *data = SvPVbyte (string, len);
763		1439
764	/* work around bugs in 5.10 where manipulating magic values
765	* makes perl ignore the magic in subsequent accesses.
766	* also make a copy of non-PV values, to get them into a clean
767	* state (SvPV should do that, but it's buggy, see below).
768	*/
769	/*SvGETMAGIC (string);*/
770	if (SvMAGICAL (string) || !SvPOK (string))
771	string = sv_2mortal (newSVsv (string));
772
773	SvUPGRADE (string, SVt_PV);
774
775	/* work around a bug in perl 5.10, which causes SvCUR to fail an
776	* assertion with -DDEBUGGING, although SvCUR is documented to
777	* return the xpv_cur field which certainly exists after upgrading.
778	* according to nicholas clark, calling SvPOK fixes this.
779	* But it doesn't fix it, so try another workaround, call SvPV_nolen
780	* and hope for the best.
781	* Damnit, SvPV_nolen still trips over yet another assertion. This
782	* assertion business is seriously broken, try yet another workaround
783	* for the broken -DDEBUGGING.
784	*/
785	{
786	#ifdef DEBUGGING
787	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
788	#else
789	STRLEN offset = SvCUR (string);
790	#endif
791
792	if (offset > cbor->max_size && cbor->max_size)	1440	if (len > cbor->max_size && cbor->max_size)
793	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1441	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
794	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1442	(unsigned long)len, (unsigned long)cbor->max_size);
795	}
796
797	sv_utf8_downgrade (string, 0);
798		1443
799	dec.cbor = *cbor;	1444	dec.cbor = *cbor;
800	dec.cur = (U8 *)SvPVX (string);	1445	dec.cur = (U8 *)data;
801	dec.end = (U8 *)SvEND (string);	1446	dec.end = (U8 *)data + len;
802	dec.err = 0;
803	dec.depth = 0;
804		1447
805	sv = decode_sv (&dec);	1448	sv = decode_sv (&dec);
806		1449
807	if (offset_return)	1450	if (offset_return)
808	*offset_return = dec.cur;	1451	*offset_return = dec.cur;
…		…
811	if (dec.cur != dec.end && !dec.err)	1454	if (dec.cur != dec.end && !dec.err)
812	dec.err = "garbage after CBOR object";	1455	dec.err = "garbage after CBOR object";
813		1456
814	if (dec.err)	1457	if (dec.err)
815	{	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
816	SvREFCNT_dec (sv);	1470	SvREFCNT_dec_NN (sv);
		1471
		1472	if (dec.err_sv)
		1473	sv_2mortal (dec.err_sv);
		1474
817	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (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);
818	}	1476	}
819		1477
820	sv = sv_2mortal (sv);	1478	sv = sv_2mortal (sv);
821		1479
822	return sv;	1480	return sv;
823	}	1481	}
824		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	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1575	if (len)
		1576	{
		1577	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1578	count = len + 1;
		1579	}
		1580	break;
		1581	}
		1582	}
		1583	}
		1584	}
		1585
		1586	self->incr_pos = self->incr_need;
		1587
		1588	if (count > 0)
		1589	{
		1590	while (!--count)
		1591	{
		1592	if (!AvFILLp (self->incr_count))
		1593	return 1; // done
		1594
		1595	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1596	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1597	}
		1598
		1599	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1600	}
		1601	}
		1602
		1603	return 0;
		1604	}
		1605
		1606
825	/////////////////////////////////////////////////////////////////////////////	1607	/////////////////////////////////////////////////////////////////////////////
826	// XS interface functions	1608	// XS interface functions
827		1609
828	MODULE = CBOR::XS PACKAGE = CBOR::XS	1610	MODULE = CBOR::XS PACKAGE = CBOR::XS
829		1611
830	BOOT:	1612	BOOT:
831	{	1613	{
832	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1614	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
833	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);
834	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);	1615	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
835		1616
836	cbor_true = get_bool ("CBOR::XS::true");	1617	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
837	cbor_false = get_bool ("CBOR::XS::false");	1618	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1619
		1620	types_true = get_bool ("Types::Serialiser::true" );
		1621	types_false = get_bool ("Types::Serialiser::false");
		1622	types_error = get_bool ("Types::Serialiser::error");
		1623
		1624	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1625
		1626	sv_cbor = newSVpv ("CBOR", 0);
		1627	SvREADONLY_on (sv_cbor);
		1628
		1629	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
838	}	1630	}
839		1631
840	PROTOTYPES: DISABLE	1632	PROTOTYPES: DISABLE
841		1633
842	void CLONE (...)	1634	void CLONE (...)
843	CODE:	1635	CODE:
844	cbor_stash = 0;	1636	cbor_stash = 0;
845	cbor_boolean_stash = 0;
846	cbor_tagged_stash = 0;	1637	cbor_tagged_stash = 0;
		1638	types_error_stash = 0;
		1639	types_boolean_stash = 0;
847		1640
848	void new (char *klass)	1641	void new (char *klass)
849	PPCODE:	1642	PPCODE:
850	{	1643	{
851	SV *pv = NEWSV (0, sizeof (CBOR));	1644	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
859		1652
860	void shrink (CBOR *self, int enable = 1)	1653	void shrink (CBOR *self, int enable = 1)
861	ALIAS:	1654	ALIAS:
862	shrink = F_SHRINK	1655	shrink = F_SHRINK
863	allow_unknown = F_ALLOW_UNKNOWN	1656	allow_unknown = F_ALLOW_UNKNOWN
		1657	allow_sharing = F_ALLOW_SHARING
		1658	allow_cycles = F_ALLOW_CYCLES
		1659	forbid_objects = F_FORBID_OBJECTS
		1660	pack_strings = F_PACK_STRINGS
		1661	text_keys = F_TEXT_KEYS
		1662	text_strings = F_TEXT_STRINGS
		1663	validate_utf8 = F_VALIDATE_UTF8
864	PPCODE:	1664	PPCODE:
865	{	1665	{
866	if (enable)	1666	if (enable)
867	self->flags |= ix;	1667	self->flags |= ix;
868	else	1668	else
…		…
873		1673
874	void get_shrink (CBOR *self)	1674	void get_shrink (CBOR *self)
875	ALIAS:	1675	ALIAS:
876	get_shrink = F_SHRINK	1676	get_shrink = F_SHRINK
877	get_allow_unknown = F_ALLOW_UNKNOWN	1677	get_allow_unknown = F_ALLOW_UNKNOWN
		1678	get_allow_sharing = F_ALLOW_SHARING
		1679	get_allow_cycles = F_ALLOW_CYCLES
		1680	get_forbid_objects = F_FORBID_OBJECTS
		1681	get_pack_strings = F_PACK_STRINGS
		1682	get_text_keys = F_TEXT_KEYS
		1683	get_text_strings = F_TEXT_STRINGS
		1684	get_validate_utf8 = F_VALIDATE_UTF8
878	PPCODE:	1685	PPCODE:
879	XPUSHs (boolSV (self->flags & ix));	1686	XPUSHs (boolSV (self->flags & ix));
880		1687
881	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1688	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
882	PPCODE:	1689	PPCODE:
…		…
898	CODE:	1705	CODE:
899	RETVAL = self->max_size;	1706	RETVAL = self->max_size;
900	OUTPUT:	1707	OUTPUT:
901	RETVAL	1708	RETVAL
902		1709
903	#if 0 //TODO	1710	void filter (CBOR *self, SV *filter = 0)
904
905	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
906	PPCODE:	1711	PPCODE:
907	{
908	SvREFCNT_dec (self->cb_object);	1712	SvREFCNT_dec (self->filter);
909	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1713	self->filter = filter ? newSVsv (filter) : filter;
910
911	XPUSHs (ST (0));	1714	XPUSHs (ST (0));
912	}
913		1715
914	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1716	SV *get_filter (CBOR *self)
915	PPCODE:	1717	CODE:
916	{	1718	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
917	if (!self->cb_sk_object)	1719	OUTPUT:
918	self->cb_sk_object = newHV ();	1720	RETVAL
919
920	if (SvOK (cb))
921	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
922	else
923	{
924	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
925
926	if (!HvKEYS (self->cb_sk_object))
927	{
928	SvREFCNT_dec (self->cb_sk_object);
929	self->cb_sk_object = 0;
930	}
931	}
932
933	XPUSHs (ST (0));
934	}
935
936	#endif
937		1721
938	void encode (CBOR *self, SV *scalar)	1722	void encode (CBOR *self, SV *scalar)
939	PPCODE:	1723	PPCODE:
940	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1724	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
941	XPUSHs (scalar);	1725	XPUSHs (scalar);
…		…
954	EXTEND (SP, 2);	1738	EXTEND (SP, 2);
955	PUSHs (sv);	1739	PUSHs (sv);
956	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1740	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
957	}	1741	}
958		1742
959	#if 0	1743	void incr_parse (CBOR *self, SV *cborstr)
		1744	ALIAS:
		1745	incr_parse_multiple = 1
		1746	PPCODE:
		1747	{
		1748	if (SvUTF8 (cborstr))
		1749	sv_utf8_downgrade (cborstr, 0);
		1750
		1751	if (!self->incr_count)
		1752	{
		1753	self->incr_count = newAV ();
		1754	self->incr_pos = 0;
		1755	self->incr_need = 1;
		1756
		1757	av_push (self->incr_count, newSViv (1));
		1758	}
		1759
		1760	do
		1761	{
		1762	if (!incr_parse (self, cborstr))
		1763	{
		1764	if (self->incr_need > self->max_size && self->max_size)
		1765	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1766	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1767
		1768	break;
		1769	}
		1770
		1771	SV *sv;
		1772	char *offset;
		1773
		1774	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1775	XPUSHs (sv);
		1776
		1777	sv_chop (cborstr, offset);
		1778
		1779	av_clear (self->incr_count);
		1780	av_push (self->incr_count, newSViv (1));
		1781
		1782	self->incr_pos = 0;
		1783	self->incr_need = self->incr_pos + 1;
		1784	}
		1785	while (ix);
		1786	}
		1787
		1788	void incr_reset (CBOR *self)
		1789	CODE:
		1790	{
		1791	SvREFCNT_dec (self->incr_count);
		1792	self->incr_count = 0;
		1793	}
960		1794
961	void DESTROY (CBOR *self)	1795	void DESTROY (CBOR *self)
962	CODE:	1796	PPCODE:
963	SvREFCNT_dec (self->cb_sk_object);	1797	cbor_free (self);
964	SvREFCNT_dec (self->cb_object);
965
966	#endif
967		1798
968	PROTOTYPES: ENABLE	1799	PROTOTYPES: ENABLE
969		1800
970	void encode_cbor (SV *scalar)	1801	void encode_cbor (SV *scalar)
		1802	ALIAS:
		1803	encode_cbor = 0
		1804	encode_cbor_sharing = F_ALLOW_SHARING
971	PPCODE:	1805	PPCODE:
972	{	1806	{
973	CBOR cbor;	1807	CBOR cbor;
974	cbor_init (&cbor);	1808	cbor_init (&cbor);
		1809	cbor.flags |= ix;
975	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1810	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
976	XPUSHs (scalar);	1811	XPUSHs (scalar);
977	}	1812	}
978		1813
979	void decode_cbor (SV *cborstr)	1814	void decode_cbor (SV *cborstr)
…		…
983	cbor_init (&cbor);	1818	cbor_init (&cbor);
984	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1819	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
985	XPUSHs (cborstr);	1820	XPUSHs (cborstr);
986	}	1821	}
987		1822
		1823	#ifdef __AFL_COMPILER
		1824
		1825	void
		1826	afl_init ()
		1827	CODE:
		1828	__AFL_INIT ();
		1829
		1830	int
		1831	afl_loop (unsigned int count = 10000)
		1832	CODE:
		1833	RETVAL = __AFL_LOOP (count);
		1834	OUTPUT:
		1835	RETVAL
		1836
		1837	#endif
		1838

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