ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/CBOR-XS/XS.xs

Comparing CBOR-XS/XS.xs (file contents):
Revision 1.8 by root, Sun Oct 27 10:12:01 2013 UTC vs.
Revision 1.76 by root, Thu Sep 7 23:57:58 2023 UTC

…		…
6	#include <string.h>	6	#include <string.h>
7	#include <stdlib.h>	7	#include <stdlib.h>
8	#include <stdio.h>	8	#include <stdio.h>
9	#include <limits.h>	9	#include <limits.h>
10	#include <float.h>	10	#include <float.h>
		11	#include <inttypes.h>
11		12
		13	#define ECB_NO_THREADS 1
12	#include "ecb.h"	14	#include "ecb.h"
13		15
14	// known tags, rfc7049	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	// perl's is_utf8_string interprets len=0 as "calculate len", but we want it to mean 0
		34	#define cbor_is_utf8_string(str,len) (!(len) || is_utf8_string ((str), (len)))
		35
		36	// known major and minor types
		37	enum cbor_type
		38	{
		39	MAJOR_SHIFT = 5,
		40	MINOR_MASK = 0x1f,
		41
		42	MAJOR_POS_INT = 0 << MAJOR_SHIFT,
		43	MAJOR_NEG_INT = 1 << MAJOR_SHIFT,
		44	MAJOR_BYTES = 2 << MAJOR_SHIFT,
		45	MAJOR_TEXT = 3 << MAJOR_SHIFT,
		46	MAJOR_ARRAY = 4 << MAJOR_SHIFT,
		47	MAJOR_MAP = 5 << MAJOR_SHIFT,
		48	MAJOR_TAG = 6 << MAJOR_SHIFT,
		49	MAJOR_MISC = 7 << MAJOR_SHIFT,
		50
		51	// INT/STRING/ARRAY/MAP subtypes
		52	LENGTH_EXT1 = 24,
		53	LENGTH_EXT2 = 25,
		54	LENGTH_EXT4 = 26,
		55	LENGTH_EXT8 = 27,
		56
		57	// SIMPLE types (effectively MISC subtypes)
		58	SIMPLE_FALSE = 20,
		59	SIMPLE_TRUE = 21,
		60	SIMPLE_NULL = 22,
		61	SIMPLE_UNDEF = 23,
		62
		63	// MISC subtype (unused)
		64	MISC_EXT1 = 24,
		65	MISC_FLOAT16 = 25,
		66	MISC_FLOAT32 = 26,
		67	MISC_FLOAT64 = 27,
		68
		69	// BYTES/TEXT/ARRAY/MAP
		70	MINOR_INDEF = 31,
		71	};
		72
		73	// known tags
15	enum cbor_tag	74	enum cbor_tag
16	{	75	{
		76	// extensions
		77	CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
		78	CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
		79	CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
		80	CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
		81	CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
		82	CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
		83	CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
		84
		85	// rfc7049
17	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8	86	CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
18	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any	87	CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
19	CBOR_TAG_POS_BIGNUM = 2, // byte string	88	CBOR_TAG_POS_BIGNUM = 2, // byte string
20	CBOR_TAG_NEG_BIGNUM = 3, // byte string	89	CBOR_TAG_NEG_BIGNUM = 3, // byte string
21	CBOR_TAG_DECIMAL = 4, // decimal fraction, array	90	CBOR_TAG_DECIMAL = 4, // decimal fraction, array
22	CBOR_TAG_BIGFLOAT = 5, // array	91	CBOR_TAG_BIGFLOAT = 5, // array
23		92
24	CBOR_TAG_CONV_B64U = 21, // base64url, any	93	CBOR_TAG_CONV_B64U = 21, // base64url, any
25	CBOR_TAG_CONV_B64 = 22, // base64, any	94	CBOR_TAG_CONV_B64 = 22, // base64, any
26	CBOR_TAG_CONV_HEX = 23, // base16, any	95	CBOR_TAG_CONV_HEX = 23, // base16, any
27	CBOR_TAG_CBOR = 24, // embedded cbor, byte string	96	CBOR_TAG_CBOR = 24, // embedded cbor, byte string
28		97
29	CBOR_TAG_URI = 32, // URI rfc3986, utf-8	98	CBOR_TAG_URI = 32, // URI rfc3986, utf-8
30	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8	99	CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
31	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8	100	CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
32	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8	101	CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
33	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8	102	CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
34		103
35	CBOR_TAG_MAGIC = 55799	104	CBOR_TAG_MAGIC = 55799, // self-describe cbor
36	};	105	};
37		106
		107	// known forced types, also hardcoded in CBOR.pm
		108	enum
		109	{
		110	AS_CBOR = 0,
		111	AS_INT = 1,
		112	AS_BYTES = 2,
		113	AS_TEXT = 3,
		114	AS_FLOAT16 = 4,
		115	AS_FLOAT32 = 5,
		116	AS_FLOAT64 = 6,
		117	AS_MAP = 7,
		118	// possibly future enhancements: (generic) float, (generic) string
		119	};
		120
38	#define F_SHRINK 0x00000200UL	121	#define F_SHRINK 0x00000001UL
39	#define F_ALLOW_UNKNOWN 0x00002000UL	122	#define F_ALLOW_UNKNOWN 0x00000002UL
		123	#define F_ALLOW_SHARING 0x00000004UL
		124	#define F_ALLOW_CYCLES 0x00000008UL
		125	#define F_FORBID_OBJECTS 0x00000010UL
		126	#define F_PACK_STRINGS 0x00000020UL
		127	#define F_TEXT_KEYS 0x00000040UL
		128	#define F_TEXT_STRINGS 0x00000080UL
		129	#define F_VALIDATE_UTF8 0x00000100UL
40		130
41	#define INIT_SIZE 32 // initial scalar size to be allocated	131	#define INIT_SIZE 32 // initial scalar size to be allocated
42		132
43	#define SB do {	133	#define SB do {
44	#define SE } while (0)	134	#define SE } while (0)
…		…
55	#else	145	#else
56	# define CBOR_SLOW 0	146	# define CBOR_SLOW 0
57	# define CBOR_STASH cbor_stash	147	# define CBOR_STASH cbor_stash
58	#endif	148	#endif
59		149
60	static HV *cbor_stash, *cbor_boolean_stash, *cbor_tagged_stash; // CBOR::XS::	150	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
61	static SV *cbor_true, *cbor_false;	151	static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
62		152
63	typedef struct {	153	typedef struct {
64	U32 flags;	154	U32 flags;
65	U32 max_depth;	155	U32 max_depth;
66	STRLEN max_size;	156	STRLEN max_size;
		157	SV *filter;
		158
		159	// for the incremental parser
		160	STRLEN incr_pos; // the current offset into the text
		161	STRLEN incr_need; // minimum bytes needed to decode
		162	AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef.
67	} CBOR;	163	} CBOR;
68		164
69	ecb_inline void	165	ecb_inline void
70	cbor_init (CBOR *cbor)	166	cbor_init (CBOR *cbor)
71	{	167	{
72	Zero (cbor, 1, CBOR);	168	Zero (cbor, 1, CBOR);
73	cbor->max_depth = 512;	169	cbor->max_depth = 512;
		170	}
		171
		172	ecb_inline void
		173	cbor_free (CBOR *cbor)
		174	{
		175	SvREFCNT_dec (cbor->filter);
		176	SvREFCNT_dec (cbor->incr_count);
74	}	177	}
75		178
76	/////////////////////////////////////////////////////////////////////////////	179	/////////////////////////////////////////////////////////////////////////////
77	// utility functions	180	// utility functions
78		181
…		…
100	SvPV_renew (sv, SvCUR (sv) + 1);	203	SvPV_renew (sv, SvCUR (sv) + 1);
101	#endif	204	#endif
102	}	205	}
103	}	206	}
104		207
105	/////////////////////////////////////////////////////////////////////////////	208	// minimum length of a string to be registered for stringref
106	// fp hell	209	ecb_inline STRLEN
107		210	minimum_string_length (UV idx)
108	//TODO	211	{
		212	return idx <= 23 ? 3
		213	: idx <= 0xffU ? 4
		214	: idx <= 0xffffU ? 5
		215	: idx <= 0xffffffffU ? 7
		216	: 11;
		217	}
109		218
110	/////////////////////////////////////////////////////////////////////////////	219	/////////////////////////////////////////////////////////////////////////////
111	// encoder	220	// encoder
112		221
113	// structure used for encoding CBOR	222	// structure used for encoding CBOR
…		…
116	char *cur; // SvPVX (sv) + current output position	225	char *cur; // SvPVX (sv) + current output position
117	char *end; // SvEND (sv)	226	char *end; // SvEND (sv)
118	SV *sv; // result scalar	227	SV *sv; // result scalar
119	CBOR cbor;	228	CBOR cbor;
120	U32 depth; // recursion level	229	U32 depth; // recursion level
		230	HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
		231	UV stringref_idx;
		232	HV *shareable; // ptr => index, or 0
		233	UV shareable_idx;
121	} enc_t;	234	} enc_t;
122		235
123	ecb_inline void	236	ecb_inline void
124	need (enc_t *enc, STRLEN len)	237	need (enc_t *enc, STRLEN len)
125	{	238	{
126	if (ecb_expect_false (enc->cur + len >= enc->end))	239	if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
127	{	240	{
128	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);	241	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
129	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);	242	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
130	enc->cur = SvPVX (enc->sv) + cur;	243	enc->cur = SvPVX (enc->sv) + cur;
131	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	244	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
132	}	245	}
133	}	246	}
134		247
		248	static void encode_sv (enc_t *enc, SV *sv);
		249
135	ecb_inline void	250	ecb_inline void
136	encode_ch (enc_t *enc, char ch)	251	encode_ch (enc_t *enc, char ch)
137	{	252	{
138	need (enc, 1);	253	need (enc, 1);
139	*enc->cur++ = ch;	254	*enc->cur++ = ch;
140	}	255	}
141		256
		257	// used for tags, intregers, element counts and so on
142	static void	258	static void
143	encode_uint (enc_t *enc, int major, UV len)	259	encode_uint (enc_t *enc, int major, UV len)
144	{	260	{
145	need (enc, 9);	261	need (enc, 9);
146		262
147	if (len < 24)	263	if (ecb_expect_true (len < LENGTH_EXT1))
148	*enc->cur++ = major | len;	264	*enc->cur++ = major | len;
149	else if (len <= 0xff)	265	else if (ecb_expect_true (len <= 0xffU))
150	{	266	{
151	*enc->cur++ = major | 24;	267	*enc->cur++ = major | LENGTH_EXT1;
152	*enc->cur++ = len;	268	*enc->cur++ = len;
153	}	269	}
154	else if (len <= 0xffff)	270	else if (len <= 0xffffU)
155	{	271	{
156	*enc->cur++ = major | 25;	272	*enc->cur++ = major | LENGTH_EXT2;
157	*enc->cur++ = len >> 8;	273	*enc->cur++ = len >> 8;
158	*enc->cur++ = len;	274	*enc->cur++ = len;
159	}	275	}
160	else if (len <= 0xffffffff)	276	else if (len <= 0xffffffffU)
161	{	277	{
162	*enc->cur++ = major | 26;	278	*enc->cur++ = major | LENGTH_EXT4;
163	*enc->cur++ = len >> 24;	279	*enc->cur++ = len >> 24;
164	*enc->cur++ = len >> 16;	280	*enc->cur++ = len >> 16;
165	*enc->cur++ = len >> 8;	281	*enc->cur++ = len >> 8;
166	*enc->cur++ = len;	282	*enc->cur++ = len;
167	}	283	}
168	else	284	else
169	{	285	{
170	*enc->cur++ = major | 27;	286	*enc->cur++ = major | LENGTH_EXT8;
171	*enc->cur++ = len >> 56;	287	*enc->cur++ = len >> 56;
172	*enc->cur++ = len >> 48;	288	*enc->cur++ = len >> 48;
173	*enc->cur++ = len >> 40;	289	*enc->cur++ = len >> 40;
174	*enc->cur++ = len >> 32;	290	*enc->cur++ = len >> 32;
175	*enc->cur++ = len >> 24;	291	*enc->cur++ = len >> 24;
…		…
177	*enc->cur++ = len >> 8;	293	*enc->cur++ = len >> 8;
178	*enc->cur++ = len;	294	*enc->cur++ = len;
179	}	295	}
180	}	296	}
181		297
182	static void	298	// encodes a perl value into a CBOR integer
		299	ecb_inline void
		300	encode_int (enc_t *enc, SV *sv)
		301	{
		302	if (SvIsUV (sv))
		303	encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
		304	else if (SvIVX (sv) >= 0)
		305	encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
		306	else
		307	encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
		308	}
		309
		310	ecb_inline void
		311	encode_tag (enc_t *enc, UV tag)
		312	{
		313	encode_uint (enc, MAJOR_TAG, tag);
		314	}
		315
		316	// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
		317	ecb_noinline static void
183	encode_str (enc_t *enc, int utf8, char *str, STRLEN len)	318	encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
184	{	319	{
185	encode_uint (enc, utf8 ? 0x60 : 0x40, len);	320	STRLEN ulen = len;
		321	U8 *p, *pend = (U8 *)str + len;
		322
		323	for (p = (U8 *)str; p < pend; ++p)
		324	ulen += *p >> 7; // count set high bits
		325
		326	encode_uint (enc, MAJOR_TEXT, ulen);
		327
		328	need (enc, ulen);
		329	for (p = (U8 *)str; p < pend; ++p)
		330	if (*p < 0x80)
		331	*enc->cur++ = *p;
		332	else
		333	{
		334	*enc->cur++ = 0xc0 + (*p >> 6);
		335	*enc->cur++ = 0x80 + (*p & 63);
		336	}
		337	}
		338
		339	ecb_inline void
		340	encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		341	{
		342	if (ecb_expect_false (upgrade_utf8))
		343	if (!utf8)
		344	{
		345	encode_str_utf8 (enc, utf8, str, len);
		346	return;
		347	}
		348
		349	encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
186	need (enc, len);	350	need (enc, len);
187	memcpy (enc->cur, str, len);	351	memcpy (enc->cur, str, len);
188	enc->cur += len;	352	enc->cur += len;
189	}	353	}
190		354
191	static void encode_sv (enc_t *enc, SV *sv);	355	ecb_inline void
		356	encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
		357	{
		358	if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
		359	{
		360	SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
		361
		362	if (SvOK (*svp))
		363	{
		364	// already registered, use stringref
		365	encode_tag (enc, CBOR_TAG_STRINGREF);
		366	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		367	return;
		368	}
		369	else if (len >= minimum_string_length (enc->stringref_idx))
		370	{
		371	// register only
		372	sv_setuv (*svp, enc->stringref_idx);
		373	++enc->stringref_idx;
		374	}
		375	}
		376
		377	encode_str (enc, upgrade_utf8, utf8, str, len);
		378	}
		379
		380	ecb_inline void
		381	encode_float16 (enc_t *enc, NV nv)
		382	{
		383	need (enc, 1+2);
		384
		385	*enc->cur++ = MAJOR_MISC | MISC_FLOAT16;
		386
		387	uint16_t fp = ecb_float_to_binary16 (nv);
		388
		389	if (!ecb_big_endian ())
		390	fp = ecb_bswap16 (fp);
		391
		392	memcpy (enc->cur, &fp, 2);
		393	enc->cur += 2;
		394	}
		395
		396	ecb_inline void
		397	encode_float32 (enc_t *enc, NV nv)
		398	{
		399	need (enc, 1+4);
		400
		401	*enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
		402
		403	uint32_t fp = ecb_float_to_binary32 (nv);
		404
		405	if (!ecb_big_endian ())
		406	fp = ecb_bswap32 (fp);
		407
		408	memcpy (enc->cur, &fp, 4);
		409	enc->cur += 4;
		410	}
		411
		412	ecb_inline void
		413	encode_float64 (enc_t *enc, NV nv)
		414	{
		415	need (enc, 1+8);
		416
		417	*enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
		418
		419	uint64_t fp = ecb_double_to_binary64 (nv);
		420
		421	if (!ecb_big_endian ())
		422	fp = ecb_bswap64 (fp);
		423
		424	memcpy (enc->cur, &fp, 8);
		425	enc->cur += 8;
		426	}
		427
		428	ecb_inline void
		429	encode_bool (enc_t *enc, int istrue)
		430	{
		431	encode_ch (enc, istrue ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
		432	}
		433
		434	// encodes an arrayref containing key-value pairs as CBOR map
		435	ecb_inline void
		436	encode_array_as_map (enc_t *enc, SV *sv)
		437	{
		438	if (enc->depth >= enc->cbor.max_depth)
		439	croak (ERR_NESTING_EXCEEDED);
		440
		441	++enc->depth;
		442
		443	// as_map does error checking for us, but we re-check in case
		444	// things have changed.
		445
		446	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		447	croak ("CBOR::XS::as_map requires an array reference (did you change the array after calling as_map?)");
		448
		449	AV *av = (AV *)SvRV (sv);
		450	int i, len = av_len (av);
		451
		452	if (!(len & 1))
		453	croak ("CBOR::XS::as_map requires an even number of elements (did you change the array after calling as_map?)");
		454
		455	encode_uint (enc, MAJOR_MAP, (len + 1) >> 1);
		456
		457	for (i = 0; i <= len; ++i)
		458	{
		459	SV **svp = av_fetch (av, i, 0);
		460	encode_sv (enc, svp ? *svp : &PL_sv_undef);
		461	}
		462
		463	--enc->depth;
		464	}
		465
		466	ecb_inline void
		467	encode_forced (enc_t *enc, UV type, SV *sv)
		468	{
		469	switch (type)
		470	{
		471	case AS_CBOR:
		472	{
		473	STRLEN len;
		474	char *str = SvPVbyte (sv, len);
		475
		476	need (enc, len);
		477	memcpy (enc->cur, str, len);
		478	enc->cur += len;
		479	}
		480	break;
		481
		482	case AS_BYTES:
		483	{
		484	STRLEN len;
		485	char *str = SvPVbyte (sv, len);
		486	encode_strref (enc, 0, 0, str, len);
		487	}
		488	break;
		489
		490	case AS_TEXT:
		491	{
		492	STRLEN len;
		493	char *str = SvPVutf8 (sv, len);
		494	encode_strref (enc, 1, 1, str, len);
		495	}
		496	break;
		497
		498	case AS_INT: encode_int (enc, sv); break;
		499
		500	case AS_FLOAT16: encode_float16 (enc, SvNV (sv)); break;
		501	case AS_FLOAT32: encode_float32 (enc, SvNV (sv)); break;
		502	case AS_FLOAT64: encode_float64 (enc, SvNV (sv)); break;
		503
		504	case AS_MAP: encode_array_as_map (enc, sv); break;
		505
		506	default:
		507	croak ("encountered malformed CBOR::XS::Tagged object");
		508	}
		509	}
192		510
193	static void	511	static void
194	encode_av (enc_t *enc, AV *av)	512	encode_av (enc_t *enc, AV *av)
195	{	513	{
196	int i, len = av_len (av);	514	int i, len = av_len (av);
…		…
198	if (enc->depth >= enc->cbor.max_depth)	516	if (enc->depth >= enc->cbor.max_depth)
199	croak (ERR_NESTING_EXCEEDED);	517	croak (ERR_NESTING_EXCEEDED);
200		518
201	++enc->depth;	519	++enc->depth;
202		520
203	encode_uint (enc, 0x80, len + 1);	521	encode_uint (enc, MAJOR_ARRAY, len + 1);
204		522
		523	if (ecb_expect_false (SvMAGICAL (av)))
205	for (i = 0; i <= len; ++i)	524	for (i = 0; i <= len; ++i)
206	{	525	{
207	SV **svp = av_fetch (av, i, 0);	526	SV **svp = av_fetch (av, i, 0);
208	encode_sv (enc, svp ? *svp : &PL_sv_undef);	527	encode_sv (enc, svp ? *svp : &PL_sv_undef);
209	}	528	}
		529	else
		530	for (i = 0; i <= len; ++i)
		531	{
		532	SV *sv = AvARRAY (av)[i];
		533	encode_sv (enc, sv ? sv : &PL_sv_undef);
		534	}
210		535
211	--enc->depth;	536	--enc->depth;
212	}	537	}
213		538
214	static void	539	static void
…		…
222	++enc->depth;	547	++enc->depth;
223		548
224	int pairs = hv_iterinit (hv);	549	int pairs = hv_iterinit (hv);
225	int mg = SvMAGICAL (hv);	550	int mg = SvMAGICAL (hv);
226		551
227	if (mg)	552	if (ecb_expect_false (mg))
228	encode_ch (enc, 0xa0 | 31);	553	encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
229	else	554	else
230	encode_uint (enc, 0xa0, pairs);	555	encode_uint (enc, MAJOR_MAP, pairs);
231		556
232	while ((he = hv_iternext (hv)))	557	while ((he = hv_iternext (hv)))
233	{	558	{
234	if (HeKLEN (he) == HEf_SVKEY)	559	if (HeKLEN (he) == HEf_SVKEY)
235	encode_sv (enc, HeSVKEY (he));	560	encode_sv (enc, HeSVKEY (he));
236	else	561	else
237	encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));	562	encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
238		563
239	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));	564	encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
240	}	565	}
241		566
242	if (mg)	567	if (ecb_expect_false (mg))
243	encode_ch (enc, 0xe0 | 31);	568	encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
244		569
245	--enc->depth;	570	--enc->depth;
246	}	571	}
247		572
248	// encode objects, arrays and special \0=false and \1=true values.	573	// encode objects, arrays and special \0=false and \1=true values.
249	static void	574	static void
250	encode_rv (enc_t *enc, SV *sv)	575	encode_rv (enc_t *enc, SV *sv)
251	{	576	{
252	svtype svt;
253
254	SvGETMAGIC (sv);	577	SvGETMAGIC (sv);
		578
255	svt = SvTYPE (sv);	579	svtype svt = SvTYPE (sv);
256		580
257	if (ecb_expect_false (SvOBJECT (sv)))	581	if (ecb_expect_false (SvOBJECT (sv)))
258	{	582	{
259	HV *boolean_stash = !CBOR_SLOW || cbor_boolean_stash	583	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
260	? cbor_boolean_stash	584	? types_boolean_stash
261	: gv_stashpv ("CBOR::XS::Boolean", 1);	585	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		586	HV *error_stash = !CBOR_SLOW || types_error_stash
		587	? types_error_stash
		588	: gv_stashpv ("Types::Serialiser::Error", 1);
262	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	589	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
263	? cbor_tagged_stash	590	? cbor_tagged_stash
264	: gv_stashpv ("CBOR::XS::Tagged" , 1);	591	: gv_stashpv ("CBOR::XS::Tagged" , 1);
265		592
		593	HV *stash = SvSTASH (sv);
		594
266	if (SvSTASH (sv) == boolean_stash)	595	if (stash == boolean_stash)
267	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	596	{
		597	encode_bool (enc, SvIV (sv));
		598	return;
		599	}
		600	else if (stash == error_stash)
		601	{
		602	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		603	return;
		604	}
268	else if (SvSTASH (sv) == tagged_stash)	605	else if (stash == tagged_stash)
269	{	606	{
270	if (svt != SVt_PVAV)	607	if (svt != SVt_PVAV)
271	croak ("encountered CBOR::XS::Tagged object that isn't an array");	608	croak ("encountered CBOR::XS::Tagged object that isn't an array");
272		609
		610	switch (av_len ((AV *)sv))
		611	{
		612	case 2-1:
		613	// actually a tagged value
273	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	614	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
274	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));	615	encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
		616	break;
		617
		618	case 3-1:
		619	// a forced type [value, type, undef]
		620	encode_forced (enc, SvUV (*av_fetch ((AV *)sv, 1, 1)), *av_fetch ((AV *)sv, 0, 1));
		621	break;
		622
		623	default:
		624	croak ("encountered malformed CBOR::XS::Tagged object");
		625	}
		626
		627	return;
		628	}
		629	}
		630
		631	if (ecb_expect_false (SvREFCNT (sv) > 1)
		632	&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
		633	{
		634	if (ecb_expect_false (!enc->shareable))
		635	enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
		636
		637	SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
		638
		639	if (SvOK (*svp))
		640	{
		641	encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
		642	encode_uint (enc, MAJOR_POS_INT, SvUV (*svp));
		643	return;
275	}	644	}
276	else	645	else
277	{	646	{
		647	sv_setuv (*svp, enc->shareable_idx);
		648	++enc->shareable_idx;
		649	encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
		650	}
		651	}
		652
		653	if (ecb_expect_false (SvOBJECT (sv)))
		654	{
		655	HV *stash = SvSTASH (sv);
		656	GV *method;
		657
		658	if (enc->cbor.flags & F_FORBID_OBJECTS)
		659	croak ("encountered object '%s', but forbid_objects is enabled",
		660	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		661	else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
		662	{
		663	dSP;
		664
		665	ENTER; SAVETMPS;
		666	PUSHMARK (SP);
278	// we re-bless the reference to get overload and other niceties right	667	// we re-bless the reference to get overload and other niceties right
279	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
280
281	if (to_cbor)
282	{
283	dSP;
284
285	ENTER; SAVETMPS; PUSHMARK (SP);
286	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	668	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
287		669
288	// calling with G_SCALAR ensures that we always get a 1 return value
289	PUTBACK;	670	PUTBACK;
		671	// G_SCALAR ensures that return value is 1
290	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	672	call_sv ((SV *)GvCV (method), G_SCALAR);
291	SPAGAIN;	673	SPAGAIN;
292		674
293	// catch this surprisingly common error	675	// catch this surprisingly common error
294	if (SvROK (TOPs) && SvRV (TOPs) == sv)	676	if (SvROK (TOPs) && SvRV (TOPs) == sv)
295	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	677	croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
296		678
297	sv = POPs;	679	encode_sv (enc, POPs);
		680
298	PUTBACK;	681	PUTBACK;
299		682
300	encode_sv (enc, sv);
301
302	FREETMPS; LEAVE;	683	FREETMPS; LEAVE;
		684	}
		685	else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
		686	{
		687	dSP;
		688
		689	ENTER; SAVETMPS;
		690	PUSHMARK (SP);
		691	EXTEND (SP, 2);
		692	// we re-bless the reference to get overload and other niceties right
		693	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		694	PUSHs (sv_cbor);
		695
		696	PUTBACK;
		697	int count = call_sv ((SV *)GvCV (method), G_ARRAY);
		698	SPAGAIN;
		699
		700	// catch this surprisingly common error
		701	if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
		702	croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
		703
		704	encode_tag (enc, CBOR_TAG_PERL_OBJECT);
		705	encode_uint (enc, MAJOR_ARRAY, count + 1);
		706	encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
		707
		708	{
		709	int i;
		710
		711	for (i = 0; i < count; ++i)
		712	encode_sv (enc, SP[i + 1 - count]);
		713
		714	SP -= count;
303	}	715	}
		716
		717	PUTBACK;
		718
		719	FREETMPS; LEAVE;
		720	}
304	else	721	else
305	croak ("encountered object '%s', but no TO_CBOR method available on it",	722	croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
306	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	723	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
307	}
308	}	724	}
309	else if (svt == SVt_PVHV)	725	else if (svt == SVt_PVHV)
310	encode_hv (enc, (HV *)sv);	726	encode_hv (enc, (HV *)sv);
311	else if (svt == SVt_PVAV)	727	else if (svt == SVt_PVAV)
312	encode_av (enc, (AV *)sv);	728	encode_av (enc, (AV *)sv);
313	else if (svt < SVt_PVAV)
314	{
315	STRLEN len = 0;
316	char *pv = svt ? SvPV (sv, len) : 0;
317
318	if (len == 1 && *pv == '1')
319	encode_ch (enc, 0xe0 | 21);
320	else if (len == 1 && *pv == '0')
321	encode_ch (enc, 0xe0 | 20);
322	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
323	encode_ch (enc, 0xe0 | 23);
324	else
325	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
326	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
327	}
328	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
329	encode_ch (enc, 0xe0 | 23);
330	else	729	else
331	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	730	{
332	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	731	encode_tag (enc, CBOR_TAG_INDIRECTION);
		732	encode_sv (enc, sv);
		733	}
333	}	734	}
334		735
335	static void	736	static void
336	encode_nv (enc_t *enc, SV *sv)	737	encode_nv (enc_t *enc, SV *sv)
337	{	738	{
338	double nv = SvNVX (sv);	739	double nv = SvNVX (sv);
339		740
340	need (enc, 9);	741	need (enc, 9);
341		742
342	if (ecb_expect_false (nv == (U32)nv))	743	if (ecb_expect_false (nv == (NV)(U32)nv))
343	encode_uint (enc, 0x00, (U32)nv);	744	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
344	//TODO: maybe I32?	745	//TODO: maybe I32?
345	else if (ecb_expect_false (nv == (float)nv))	746	else if (ecb_expect_false (nv == (float)nv))
346	{	747	encode_float32 (enc, nv);
347	uint32_t fp = ecb_float_to_binary32 (nv);
348
349	*enc->cur++ = 0xe0 | 26;
350
351	if (!ecb_big_endian ())
352	fp = ecb_bswap32 (fp);
353
354	memcpy (enc->cur, &fp, 4);
355	enc->cur += 4;
356	}
357	else	748	else
358	{	749	encode_float64 (enc, nv);
359	uint64_t fp = ecb_double_to_binary64 (nv);
360
361	*enc->cur++ = 0xe0 | 27;
362
363	if (!ecb_big_endian ())
364	fp = ecb_bswap64 (fp);
365
366	memcpy (enc->cur, &fp, 8);
367	enc->cur += 8;
368	}
369	}	750	}
370		751
371	static void	752	static void
372	encode_sv (enc_t *enc, SV *sv)	753	encode_sv (enc_t *enc, SV *sv)
373	{	754	{
…		…
375		756
376	if (SvPOKp (sv))	757	if (SvPOKp (sv))
377	{	758	{
378	STRLEN len;	759	STRLEN len;
379	char *str = SvPV (sv, len);	760	char *str = SvPV (sv, len);
380	encode_str (enc, SvUTF8 (sv), str, len);	761	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
381	}	762	}
382	else if (SvNOKp (sv))	763	else if (SvNOKp (sv))
383	encode_nv (enc, sv);	764	encode_nv (enc, sv);
384	else if (SvIOKp (sv))	765	else if (SvIOKp (sv))
385	{	766	encode_int (enc, sv);
386	if (SvIsUV (sv))
387	encode_uint (enc, 0x00, SvUVX (sv));
388	else if (SvIVX (sv) >= 0)
389	encode_uint (enc, 0x00, SvIVX (sv));
390	else
391	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
392	}
393	else if (SvROK (sv))	767	else if (SvROK (sv))
394	encode_rv (enc, SvRV (sv));	768	encode_rv (enc, SvRV (sv));
395	else if (!SvOK (sv))	769	else if (!SvOK (sv))
396	encode_ch (enc, 0xe0 | 22);	770	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
397	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	771	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
398	encode_ch (enc, 0xe0 | 23);	772	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
399	else	773	else
400	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",	774	croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data",
401	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	775	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
402	}	776	}
403		777
404	static SV *	778	static SV *
405	encode_cbor (SV *scalar, CBOR *cbor)	779	encode_cbor (SV *scalar, CBOR *cbor)
406	{	780	{
407	enc_t enc;	781	enc_t enc = { 0 };
408		782
409	enc.cbor = *cbor;	783	enc.cbor = *cbor;
410	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	784	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
411	enc.cur = SvPVX (enc.sv);	785	enc.cur = SvPVX (enc.sv);
412	enc.end = SvEND (enc.sv);	786	enc.end = SvEND (enc.sv);
413	enc.depth = 0;
414		787
415	SvPOK_only (enc.sv);	788	SvPOK_only (enc.sv);
		789
		790	if (cbor->flags & F_PACK_STRINGS)
		791	{
		792	encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
		793	enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
		794	enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
		795	}
		796
416	encode_sv (&enc, scalar);	797	encode_sv (&enc, scalar);
417		798
418	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	799	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
419	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	800	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
420		801
…		…
434	U8 *end; // end of input string	815	U8 *end; // end of input string
435	const char *err; // parse error, if != 0	816	const char *err; // parse error, if != 0
436	CBOR cbor;	817	CBOR cbor;
437	U32 depth; // recursion depth	818	U32 depth; // recursion depth
438	U32 maxdepth; // recursion depth limit	819	U32 maxdepth; // recursion depth limit
		820	AV *shareable;
		821	AV *stringref;
		822	SV *decode_tagged;
		823	SV *err_sv; // optional sv for error, needs to be freed
439	} dec_t;	824	} dec_t;
440		825
441	#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE	826	// set dec->err to ERRSV
		827	ecb_cold static void
		828	err_errsv (dec_t *dec)
		829	{
		830	if (!dec->err)
		831	{
		832	dec->err_sv = newSVsv (ERRSV);
442		833
443	#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")	834	// chop off the trailing \n
		835	SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
		836	*SvEND (dec->err_sv) = 0;
444		837
		838	dec->err = SvPVutf8_nolen (dec->err_sv);
		839	}
		840	}
		841
		842	// the following functions are used to reduce code size and help the compiler to optimise
		843	ecb_cold static void
		844	err_set (dec_t *dec, const char *reason)
		845	{
		846	if (!dec->err)
		847	dec->err = reason;
		848	}
		849
		850	ecb_cold static void
		851	err_unexpected_end (dec_t *dec)
		852	{
		853	err_set (dec, "unexpected end of CBOR data");
		854	}
		855
		856	#define ERR_DO(do) SB do; goto fail; SE
		857	#define ERR(reason) ERR_DO (err_set (dec, reason))
		858	#define ERR_ERRSV ERR_DO (err_errsv (dec))
		859
		860	#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
		861
445	#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED)	862	#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED)
446	#define DEC_DEC_DEPTH --dec->depth	863	#define DEC_DEC_DEPTH --dec->depth
447		864
448	static UV	865	static UV
449	decode_uint (dec_t *dec)	866	decode_uint (dec_t *dec)
450	{	867	{
451	switch (*dec->cur & 31)	868	U8 m = *dec->cur & MINOR_MASK;
452	{	869	++dec->cur;
453	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
454	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
455	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
456	return *dec->cur++ & 31;
457		870
458	case 24:	871	if (ecb_expect_true (m < LENGTH_EXT1))
		872	return m;
		873	else if (ecb_expect_true (m == LENGTH_EXT1))
		874	{
459	WANT (2);	875	WANT (1);
460	dec->cur += 2;	876	dec->cur += 1;
461	return dec->cur[-1];	877	return dec->cur[-1];
462		878	}
463	case 25:	879	else if (ecb_expect_true (m == LENGTH_EXT2))
		880	{
464	WANT (3);	881	WANT (2);
465	dec->cur += 3;	882	dec->cur += 2;
466	return (((UV)dec->cur[-2]) << 8)	883	return (((UV)dec->cur[-2]) << 8)
467	| ((UV)dec->cur[-1]);	884	| ((UV)dec->cur[-1]);
468		885	}
469	case 26:	886	else if (ecb_expect_true (m == LENGTH_EXT4))
		887	{
470	WANT (5);	888	WANT (4);
471	dec->cur += 5;	889	dec->cur += 4;
472	return (((UV)dec->cur[-4]) << 24)	890	return (((UV)dec->cur[-4]) << 24)
473	| (((UV)dec->cur[-3]) << 16)	891	| (((UV)dec->cur[-3]) << 16)
474	| (((UV)dec->cur[-2]) << 8)	892	| (((UV)dec->cur[-2]) << 8)
475	| ((UV)dec->cur[-1]);	893	| ((UV)dec->cur[-1]);
476		894	}
477	case 27:	895	else if (ecb_expect_true (m == LENGTH_EXT8))
		896	{
478	WANT (9);	897	WANT (8);
479	dec->cur += 9;	898	dec->cur += 8;
		899
		900	return
		901	#if UVSIZE < 8
		902	0
		903	#else
480	return (((UV)dec->cur[-8]) << 56)	904	(((UV)dec->cur[-8]) << 56)
481	| (((UV)dec->cur[-7]) << 48)	905	| (((UV)dec->cur[-7]) << 48)
482	| (((UV)dec->cur[-6]) << 40)	906	| (((UV)dec->cur[-6]) << 40)
483	| (((UV)dec->cur[-5]) << 32)	907	| (((UV)dec->cur[-5]) << 32)
		908	#endif
484	| (((UV)dec->cur[-4]) << 24)	909	| (((UV)dec->cur[-4]) << 24)
485	| (((UV)dec->cur[-3]) << 16)	910	| (((UV)dec->cur[-3]) << 16)
486	| (((UV)dec->cur[-2]) << 8)	911	| (((UV)dec->cur[-2]) << 8)
487	| ((UV)dec->cur[-1]);	912	| ((UV)dec->cur[-1]);
488		913	}
489	default:	914	else
490	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	915	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
491	}
492		916
493	fail:	917	fail:
494	return 0;	918	return 0;
495	}	919	}
496		920
…		…
501	{	925	{
502	AV *av = newAV ();	926	AV *av = newAV ();
503		927
504	DEC_INC_DEPTH;	928	DEC_INC_DEPTH;
505		929
506	if ((*dec->cur & 31) == 31)	930	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
507	{	931	{
508	++dec->cur;	932	++dec->cur;
509		933
510	for (;;)	934	for (;;)
511	{	935	{
512	WANT (1);	936	WANT (1);
513		937
514	if (*dec->cur == (0xe0 | 31))	938	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
515	{	939	{
516	++dec->cur;	940	++dec->cur;
517	break;	941	break;
518	}	942	}
519		943
520	av_push (av, decode_sv (dec));	944	av_push (av, decode_sv (dec));
521	}	945	}
522	}	946	}
523	else	947	else
524	{	948	{
525	int i, len = decode_uint (dec);	949	UV i, len = decode_uint (dec);
526		950
		951	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
527	av_fill (av, len - 1);	952	av_fill (av, len - 1);
528		953
529	for (i = 0; i < len; ++i)	954	for (i = 0; i < len; ++i)
530	AvARRAY (av)[i] = decode_sv (dec);	955	AvARRAY (av)[i] = decode_sv (dec);
531	}	956	}
532		957
533	DEC_DEC_DEPTH;	958	DEC_DEC_DEPTH;
534	return newRV_noinc ((SV *)av);	959	return newRV_noinc ((SV *)av);
535		960
536	fail:	961	fail:
537	SvREFCNT_dec (av);	962	SvREFCNT_dec_NN (av);
538	DEC_DEC_DEPTH;	963	DEC_DEC_DEPTH;
539	return &PL_sv_undef;	964	return &PL_sv_undef;
540	}	965	}
541		966
		967	static void
		968	decode_he (dec_t *dec, HV *hv)
		969	{
		970	// for speed reasons, we specialcase single-string
		971	// byte or utf-8 strings as keys, but only when !stringref
		972
		973	if (ecb_expect_true (!dec->stringref))
		974	if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
		975	{
		976	STRLEN len = decode_uint (dec);
		977	char *key = (char *)dec->cur;
		978
		979	WANT (len);
		980	dec->cur += len;
		981
		982	hv_store (hv, key, len, decode_sv (dec), 0);
		983
		984	return;
		985	}
		986	else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
		987	{
		988	STRLEN len = decode_uint (dec);
		989	char *key = (char *)dec->cur;
		990
		991	WANT (len);
		992	dec->cur += len;
		993
		994	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		995	if (!cbor_is_utf8_string ((U8 *)key, len))
		996	ERR ("corrupted CBOR data (invalid UTF-8 in map key)");
		997
		998	hv_store (hv, key, -len, decode_sv (dec), 0);
		999
		1000	return;
		1001	}
		1002
		1003	SV *k = decode_sv (dec);
		1004	SV *v = decode_sv (dec);
		1005
		1006	// we leak memory if uncaught exceptions are thrown by random magical
		1007	// methods, and this is hopefully the only place where it can happen,
		1008	// so if there is a chance of an exception, take the very slow path.
		1009	// since catching exceptions is "undocumented/internal/forbidden" by
		1010	// the new p5p powers, we need to call out to a perl function :/
		1011	if (ecb_expect_false (SvAMAGIC (k)))
		1012	{
		1013	dSP;
		1014
		1015	ENTER; SAVETMPS;
		1016	PUSHMARK (SP);
		1017	EXTEND (SP, 3);
		1018	PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
		1019	PUSHs (sv_2mortal (k));
		1020	PUSHs (sv_2mortal (v));
		1021
		1022	PUTBACK;
		1023	call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
		1024	SPAGAIN;
		1025
		1026	FREETMPS; LEAVE;
		1027
		1028	if (SvTRUE (ERRSV))
		1029	ERR_ERRSV;
		1030
		1031	return;
		1032	}
		1033
		1034	hv_store_ent (hv, k, v, 0);
		1035	SvREFCNT_dec_NN (k);
		1036
		1037	fail:
		1038	;
		1039	}
		1040
542	static SV *	1041	static SV *
543	decode_hv (dec_t *dec)	1042	decode_hv (dec_t *dec)
544	{	1043	{
545	HV *hv = newHV ();	1044	HV *hv = newHV ();
546		1045
547	DEC_INC_DEPTH;	1046	DEC_INC_DEPTH;
548		1047
549	if ((*dec->cur & 31) == 31)	1048	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
550	{	1049	{
551	++dec->cur;	1050	++dec->cur;
552		1051
553	for (;;)	1052	for (;;)
554	{	1053	{
555	WANT (1);	1054	WANT (1);
556		1055
557	if (*dec->cur == (0xe0 | 31))	1056	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
558	{	1057	{
559	++dec->cur;	1058	++dec->cur;
560	break;	1059	break;
561	}	1060	}
562		1061
563	SV *k = decode_sv (dec);	1062	decode_he (dec, hv);
564	SV *v = decode_sv (dec);
565
566	hv_store_ent (hv, k, v, 0);
567	}	1063	}
568	}	1064	}
569	else	1065	else
570	{	1066	{
571	int len = decode_uint (dec);	1067	UV pairs = decode_uint (dec);
572		1068
		1069	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1070
573	while (len--)	1071	while (pairs--)
574	{	1072	decode_he (dec, hv);
575	SV *k = decode_sv (dec);
576	SV *v = decode_sv (dec);
577
578	hv_store_ent (hv, k, v, 0);
579	}
580	}	1073	}
581		1074
582	DEC_DEC_DEPTH;	1075	DEC_DEC_DEPTH;
583	return newRV_noinc ((SV *)hv);	1076	return newRV_noinc ((SV *)hv);
584		1077
585	fail:	1078	fail:
586	SvREFCNT_dec (hv);	1079	SvREFCNT_dec_NN (hv);
587	DEC_DEC_DEPTH;	1080	DEC_DEC_DEPTH;
588	return &PL_sv_undef;	1081	return &PL_sv_undef;
589	}	1082	}
590		1083
591	static SV *	1084	static SV *
592	decode_str (dec_t *dec, int utf8)	1085	decode_str (dec_t *dec, int utf8)
593	{	1086	{
594	SV *sv = 0;	1087	SV *sv = 0;
595		1088
596	if ((*dec->cur & 31) == 31)	1089	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
597	{	1090	{
		1091	// indefinite length strings
598	++dec->cur;	1092	++dec->cur;
599		1093
		1094	U8 major = *dec->cur & MAJOR_MISC;
		1095
600	sv = newSVpvn ("", 0);	1096	sv = newSVpvn ("", 0);
601		1097
602	// not very fast, and certainly not robust against illegal input
603	for (;;)	1098	for (;;)
604	{	1099	{
605	WANT (1);	1100	WANT (1);
606		1101
607	if (*dec->cur == (0xe0 | 31))	1102	if ((*dec->cur - major) > LENGTH_EXT8)
		1103	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
608	{	1104	{
609	++dec->cur;	1105	++dec->cur;
610	break;	1106	break;
611	}	1107	}
		1108	else
		1109	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
612		1110
613	sv_catsv (sv, decode_sv (dec));	1111	STRLEN len = decode_uint (dec);
		1112
		1113	WANT (len);
		1114	sv_catpvn (sv, dec->cur, len);
		1115	dec->cur += len;
614	}	1116	}
615	}	1117	}
616	else	1118	else
617	{	1119	{
618	STRLEN len = decode_uint (dec);	1120	STRLEN len = decode_uint (dec);
619		1121
620	WANT (len);	1122	WANT (len);
621	sv = newSVpvn (dec->cur, len);	1123	sv = newSVpvn (dec->cur, len);
622	dec->cur += len;	1124	dec->cur += len;
		1125
		1126	if (ecb_expect_false (dec->stringref)
		1127	&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
		1128	av_push (dec->stringref, SvREFCNT_inc_NN (sv));
623	}	1129	}
624		1130
625	if (utf8)	1131	if (utf8)
		1132	{
		1133	if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8))
		1134	if (!cbor_is_utf8_string (SvPVX (sv), SvCUR (sv)))
		1135	ERR ("corrupted CBOR data (invalid UTF-8 in text string)");
		1136
626	SvUTF8_on (sv);	1137	SvUTF8_on (sv);
		1138	}
627		1139
628	return sv;	1140	return sv;
629		1141
630	fail:	1142	fail:
631	SvREFCNT_dec (sv);	1143	SvREFCNT_dec (sv);
…		…
633	}	1145	}
634		1146
635	static SV *	1147	static SV *
636	decode_tagged (dec_t *dec)	1148	decode_tagged (dec_t *dec)
637	{	1149	{
		1150	SV *sv = 0;
638	UV tag = decode_uint (dec);	1151	UV tag = decode_uint (dec);
		1152
		1153	WANT (1);
		1154
		1155	switch (tag)
		1156	{
		1157	case CBOR_TAG_MAGIC:
639	SV *sv = decode_sv (dec);	1158	sv = decode_sv (dec);
		1159	break;
640		1160
641	if (tag == CBOR_TAG_MAGIC) // 2.4.5 Self-Describe CBOR	1161	case CBOR_TAG_INDIRECTION:
		1162	sv = newRV_noinc (decode_sv (dec));
		1163	break;
		1164
		1165	case CBOR_TAG_STRINGREF_NAMESPACE:
		1166	{
		1167	// do not use SAVETMPS/FREETMPS, as these will
		1168	// erase mortalised caches, e.g. "shareable"
		1169	ENTER;
		1170
		1171	SAVESPTR (dec->stringref);
		1172	dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
		1173
		1174	sv = decode_sv (dec);
		1175
		1176	LEAVE;
		1177	}
		1178	break;
		1179
		1180	case CBOR_TAG_STRINGREF:
		1181	{
		1182	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1183	ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
		1184
		1185	UV idx = decode_uint (dec);
		1186
		1187	if (!dec->stringref || idx >= (UV)(1 + AvFILLp (dec->stringref)))
		1188	ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
		1189
		1190	sv = newSVsv (AvARRAY (dec->stringref)[idx]);
		1191	}
		1192	break;
		1193
		1194	case CBOR_TAG_VALUE_SHAREABLE:
		1195	{
		1196	if (ecb_expect_false (!dec->shareable))
		1197	dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
		1198
		1199	if (dec->cbor.flags & F_ALLOW_CYCLES)
		1200	{
		1201	sv = newSV (0);
		1202	av_push (dec->shareable, SvREFCNT_inc_NN (sv));
		1203
		1204	SV *osv = decode_sv (dec);
		1205	sv_setsv (sv, osv);
		1206	SvREFCNT_dec_NN (osv);
		1207	}
		1208	else
		1209	{
		1210	av_push (dec->shareable, &PL_sv_undef);
		1211	int idx = AvFILLp (dec->shareable);
		1212	sv = decode_sv (dec);
		1213	av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv));
		1214	}
		1215	}
		1216	break;
		1217
		1218	case CBOR_TAG_VALUE_SHAREDREF:
		1219	{
		1220	if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
		1221	ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
		1222
		1223	UV idx = decode_uint (dec);
		1224
		1225	if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
		1226	ERR ("corrupted CBOR data (sharedref index out of bounds)");
		1227
		1228	sv = newSVsv (AvARRAY (dec->shareable)[idx]);
		1229
		1230	if (sv == &PL_sv_undef)
		1231	ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled");
		1232	}
		1233	break;
		1234
		1235	case CBOR_TAG_PERL_OBJECT:
		1236	{
		1237	if (dec->cbor.flags & F_FORBID_OBJECTS)
		1238	goto filter;
		1239
		1240	sv = decode_sv (dec);
		1241
		1242	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
		1243	ERR ("corrupted CBOR data (non-array perl object)");
		1244
		1245	AV *av = (AV *)SvRV (sv);
		1246	int len = av_len (av) + 1;
		1247	HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
		1248
		1249	if (!stash)
		1250	ERR ("cannot decode perl-object (package does not exist)");
		1251
		1252	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1253
		1254	if (!method)
		1255	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1256
		1257	dSP;
		1258
		1259	ENTER; SAVETMPS;
		1260	PUSHMARK (SP);
		1261	EXTEND (SP, len + 1);
		1262	// we re-bless the reference to get overload and other niceties right
		1263	PUSHs (*av_fetch (av, 0, 1));
		1264	PUSHs (sv_cbor);
		1265
		1266	int i;
		1267
		1268	for (i = 1; i < len; ++i)
		1269	PUSHs (*av_fetch (av, i, 1));
		1270
		1271	PUTBACK;
		1272	call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
		1273	SPAGAIN;
		1274
		1275	if (SvTRUE (ERRSV))
		1276	{
		1277	FREETMPS; LEAVE;
		1278	ERR_ERRSV;
		1279	}
		1280
		1281	SvREFCNT_dec_NN (sv);
		1282	sv = SvREFCNT_inc (POPs);
		1283
		1284	PUTBACK;
		1285
		1286	FREETMPS; LEAVE;
		1287	}
		1288	break;
		1289
		1290	default:
		1291	filter:
		1292	{
		1293	SV *tag_sv = newSVuv (tag);
		1294
		1295	sv = decode_sv (dec);
		1296
		1297	dSP;
		1298	ENTER; SAVETMPS;
		1299	PUSHMARK (SP);
		1300	EXTEND (SP, 2);
		1301	PUSHs (tag_sv);
		1302	PUSHs (sv);
		1303
		1304	PUTBACK;
		1305	int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
		1306	SPAGAIN;
		1307
		1308	if (SvTRUE (ERRSV))
		1309	{
		1310	SvREFCNT_dec_NN (tag_sv);
		1311	FREETMPS; LEAVE;
		1312	ERR_ERRSV;
		1313	}
		1314
		1315	if (count)
		1316	{
		1317	SvREFCNT_dec_NN (tag_sv);
		1318	SvREFCNT_dec_NN (sv);
		1319	sv = SvREFCNT_inc_NN (TOPs);
		1320	SP -= count;
		1321	}
		1322	else
		1323	{
		1324	AV *av = newAV ();
		1325	av_push (av, tag_sv);
		1326	av_push (av, sv);
		1327
		1328	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
		1329	? cbor_tagged_stash
		1330	: gv_stashpv ("CBOR::XS::Tagged" , 1);
		1331	sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
		1332	}
		1333
		1334	PUTBACK;
		1335
		1336	FREETMPS; LEAVE;
		1337	}
		1338	break;
		1339	}
		1340
642	return sv;	1341	return sv;
643		1342
644	AV *av = newAV ();	1343	fail:
645	av_push (av, newSVuv (tag));	1344	SvREFCNT_dec (sv);
646	av_push (av, sv);	1345	return &PL_sv_undef;
647
648	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
649	? cbor_tagged_stash
650	: gv_stashpv ("CBOR::XS::Tagged" , 1);
651
652	return sv_bless (newRV_noinc ((SV *)av), tagged_stash);
653	}	1346	}
654		1347
655	static SV *	1348	static SV *
656	decode_sv (dec_t *dec)	1349	decode_sv (dec_t *dec)
657	{	1350	{
658	WANT (1);	1351	WANT (1);
659		1352
660	switch (*dec->cur >> 5)	1353	switch (*dec->cur >> MAJOR_SHIFT)
661	{	1354	{
662	case 0: // unsigned int	1355	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
663	return newSVuv (decode_uint (dec));	1356	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
664	case 1: // negative int	1357	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
665	return newSViv (-1 - (IV)decode_uint (dec));	1358	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
666	case 2: // octet string	1359	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
667	return decode_str (dec, 0);	1360	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
668	case 3: // utf-8 string	1361	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
669	return decode_str (dec, 1);	1362
670	case 4: // array	1363	case MAJOR_MISC >> MAJOR_SHIFT:
671	return decode_av (dec);
672	case 5: // map
673	return decode_hv (dec);
674	case 6: // tag
675	return decode_tagged (dec);
676	case 7: // misc
677	switch (*dec->cur++ & 31)	1364	switch (*dec->cur++ & MINOR_MASK)
678	{	1365	{
679	case 20:	1366	case SIMPLE_FALSE:
680	#if CBOR_SLOW	1367	#if CBOR_SLOW
681	cbor_false = get_bool ("CBOR::XS::false");	1368	types_false = get_bool ("Types::Serialiser::false");
682	#endif	1369	#endif
683	return newSVsv (cbor_false);	1370	return newSVsv (types_false);
684	case 21:	1371	case SIMPLE_TRUE:
685	#if CBOR_SLOW	1372	#if CBOR_SLOW
686	cbor_true = get_bool ("CBOR::XS::true");	1373	types_true = get_bool ("Types::Serialiser::true");
687	#endif	1374	#endif
688	return newSVsv (cbor_true);	1375	return newSVsv (types_true);
689	case 22:	1376	case SIMPLE_NULL:
690	return newSVsv (&PL_sv_undef);	1377	return newSVsv (&PL_sv_undef);
		1378	case SIMPLE_UNDEF:
		1379	#if CBOR_SLOW
		1380	types_error = get_bool ("Types::Serialiser::error");
		1381	#endif
		1382	return newSVsv (types_error);
691		1383
692	case 25:	1384	case MISC_FLOAT16:
693	{	1385	{
694	WANT (2);	1386	WANT (2);
695		1387
696	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1388	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
697	dec->cur += 2;	1389	dec->cur += 2;
698		1390
699	return newSVnv (ecb_binary16_to_float (fp));	1391	return newSVnv (ecb_binary16_to_float (fp));
700	}	1392	}
701		1393
702	case 26:	1394	case MISC_FLOAT32:
703	{	1395	{
704	uint32_t fp;	1396	uint32_t fp;
705	WANT (4);	1397	WANT (4);
706	memcpy (&fp, dec->cur, 4);	1398	memcpy (&fp, dec->cur, 4);
707	dec->cur += 4;	1399	dec->cur += 4;
…		…
710	fp = ecb_bswap32 (fp);	1402	fp = ecb_bswap32 (fp);
711		1403
712	return newSVnv (ecb_binary32_to_float (fp));	1404	return newSVnv (ecb_binary32_to_float (fp));
713	}	1405	}
714		1406
715	case 27:	1407	case MISC_FLOAT64:
716	{	1408	{
717	uint64_t fp;	1409	uint64_t fp;
718	WANT (8);	1410	WANT (8);
719	memcpy (&fp, dec->cur, 8);	1411	memcpy (&fp, dec->cur, 8);
720	dec->cur += 8;	1412	dec->cur += 8;
…		…
723	fp = ecb_bswap64 (fp);	1415	fp = ecb_bswap64 (fp);
724		1416
725	return newSVnv (ecb_binary64_to_double (fp));	1417	return newSVnv (ecb_binary64_to_double (fp));
726	}	1418	}
727		1419
728	// 0..19 unassigned	1420	// 0..19 unassigned simple
729	// 24 reserved + unassigned (reserved values are not encodable)	1421	// 24 reserved + unassigned simple (reserved values are not encodable)
		1422	// 28-30 unassigned misc
		1423	// 31 break code
730	default:	1424	default:
731	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1425	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
732	}	1426	}
733		1427
734	break;	1428	break;
735	}	1429	}
736		1430
…		…
739	}	1433	}
740		1434
741	static SV *	1435	static SV *
742	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1436	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
743	{	1437	{
744	dec_t dec;	1438	dec_t dec = { 0 };
745	SV *sv;	1439	SV *sv;
		1440	STRLEN len;
		1441	char *data = SvPVbyte (string, len);
746		1442
747	/* work around bugs in 5.10 where manipulating magic values
748	* makes perl ignore the magic in subsequent accesses.
749	* also make a copy of non-PV values, to get them into a clean
750	* state (SvPV should do that, but it's buggy, see below).
751	*/
752	/*SvGETMAGIC (string);*/
753	if (SvMAGICAL (string) || !SvPOK (string))
754	string = sv_2mortal (newSVsv (string));
755
756	SvUPGRADE (string, SVt_PV);
757
758	/* work around a bug in perl 5.10, which causes SvCUR to fail an
759	* assertion with -DDEBUGGING, although SvCUR is documented to
760	* return the xpv_cur field which certainly exists after upgrading.
761	* according to nicholas clark, calling SvPOK fixes this.
762	* But it doesn't fix it, so try another workaround, call SvPV_nolen
763	* and hope for the best.
764	* Damnit, SvPV_nolen still trips over yet another assertion. This
765	* assertion business is seriously broken, try yet another workaround
766	* for the broken -DDEBUGGING.
767	*/
768	{
769	#ifdef DEBUGGING
770	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
771	#else
772	STRLEN offset = SvCUR (string);
773	#endif
774
775	if (offset > cbor->max_size && cbor->max_size)	1443	if (len > cbor->max_size && cbor->max_size)
776	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",	1444	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
777	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1445	(unsigned long)len, (unsigned long)cbor->max_size);
778	}
779
780	sv_utf8_downgrade (string, 0);
781		1446
782	dec.cbor = *cbor;	1447	dec.cbor = *cbor;
783	dec.cur = (U8 *)SvPVX (string);	1448	dec.cur = (U8 *)data;
784	dec.end = (U8 *)SvEND (string);	1449	dec.end = (U8 *)data + len;
785	dec.err = 0;
786	dec.depth = 0;
787		1450
788	sv = decode_sv (&dec);	1451	sv = decode_sv (&dec);
789		1452
790	if (offset_return)	1453	if (offset_return)
791	*offset_return = dec.cur;	1454	*offset_return = dec.cur;
…		…
794	if (dec.cur != dec.end && !dec.err)	1457	if (dec.cur != dec.end && !dec.err)
795	dec.err = "garbage after CBOR object";	1458	dec.err = "garbage after CBOR object";
796		1459
797	if (dec.err)	1460	if (dec.err)
798	{	1461	{
		1462	if (dec.shareable)
		1463	{
		1464	// need to break cyclic links, which would all be in shareable
		1465	int i;
		1466	SV **svp;
		1467
		1468	for (i = av_len (dec.shareable) + 1; i--; )
		1469	if ((svp = av_fetch (dec.shareable, i, 0)))
		1470	sv_setsv (*svp, &PL_sv_undef);
		1471	}
		1472
799	SvREFCNT_dec (sv);	1473	SvREFCNT_dec_NN (sv);
		1474
		1475	if (dec.err_sv)
		1476	sv_2mortal (dec.err_sv);
		1477
800	croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur);	1478	croak ("%s, at offset %ld (octet 0x%02x)", dec.err, (long)(dec.cur - (U8 *)data), (int)(uint8_t)*dec.cur);
801	}	1479	}
802		1480
803	sv = sv_2mortal (sv);	1481	sv = sv_2mortal (sv);
804		1482
805	return sv;	1483	return sv;
806	}	1484	}
807		1485
		1486	/////////////////////////////////////////////////////////////////////////////
		1487	// incremental parser
		1488
		1489	#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0)
		1490
		1491	// returns 0 for notyet, 1 for success or error
		1492	static int
		1493	incr_parse (CBOR *self, SV *cborstr)
		1494	{
		1495	STRLEN cur;
		1496	SvPV (cborstr, cur);
		1497
		1498	while (ecb_expect_true (self->incr_need <= cur))
		1499	{
		1500	// table of integer count bytes
		1501	static I8 incr_len[MINOR_MASK + 1] = {
		1502	0, 0, 0, 0, 0, 0, 0, 0,
		1503	0, 0, 0, 0, 0, 0, 0, 0,
		1504	0, 0, 0, 0, 0, 0, 0, 0,
		1505	1, 2, 4, 8,-1,-1,-1,-2
		1506	};
		1507
		1508	const U8 *p = SvPVX (cborstr) + self->incr_pos;
		1509	U8 m = *p & MINOR_MASK;
		1510	IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1511	I8 ilen = incr_len[m];
		1512
		1513	self->incr_need = self->incr_pos + 1;
		1514
		1515	if (ecb_expect_false (ilen < 0))
		1516	{
		1517	if (m != MINOR_INDEF)
		1518	return 1; // error
		1519
		1520	if (*p == (MAJOR_MISC | MINOR_INDEF))
		1521	{
		1522	if (count >= 0)
		1523	return 1; // error
		1524
		1525	count = 1;
		1526	}
		1527	else
		1528	{
		1529	av_push (self->incr_count, newSViv (-1)); //TODO: nest
		1530	count = -1;
		1531	}
		1532	}
		1533	else
		1534	{
		1535	self->incr_need += ilen;
		1536	if (ecb_expect_false (self->incr_need > cur))
		1537	return 0;
		1538
		1539	int major = *p >> MAJOR_SHIFT;
		1540
		1541	switch (major)
		1542	{
		1543	case MAJOR_TAG >> MAJOR_SHIFT:
		1544	++count; // tags merely prefix another value
		1545	break;
		1546
		1547	case MAJOR_BYTES >> MAJOR_SHIFT:
		1548	case MAJOR_TEXT >> MAJOR_SHIFT:
		1549	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1550	case MAJOR_MAP >> MAJOR_SHIFT:
		1551	{
		1552	UV len;
		1553
		1554	if (ecb_expect_false (ilen))
		1555	{
		1556	len = 0;
		1557
		1558	do {
		1559	len = (len << 8) | *++p;
		1560	} while (--ilen);
		1561	}
		1562	else
		1563	len = m;
		1564
		1565	switch (major)
		1566	{
		1567	case MAJOR_BYTES >> MAJOR_SHIFT:
		1568	case MAJOR_TEXT >> MAJOR_SHIFT:
		1569	self->incr_need += len;
		1570	if (ecb_expect_false (self->incr_need > cur))
		1571	return 0;
		1572
		1573	break;
		1574
		1575	case MAJOR_MAP >> MAJOR_SHIFT:
		1576	len <<= 1;
		1577	/* FALLTHROUGH */
		1578	case MAJOR_ARRAY >> MAJOR_SHIFT:
		1579	if (len)
		1580	{
		1581	av_push (self->incr_count, newSViv (len + 1)); //TODO: nest
		1582	count = len + 1;
		1583	}
		1584	break;
		1585	}
		1586	}
		1587	}
		1588	}
		1589
		1590	self->incr_pos = self->incr_need;
		1591
		1592	if (count > 0)
		1593	{
		1594	while (!--count)
		1595	{
		1596	if (!AvFILLp (self->incr_count))
		1597	return 1; // done
		1598
		1599	SvREFCNT_dec_NN (av_pop (self->incr_count));
		1600	count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]);
		1601	}
		1602
		1603	SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count;
		1604	}
		1605	}
		1606
		1607	return 0;
		1608	}
		1609
		1610
808	/////////////////////////////////////////////////////////////////////////////	1611	/////////////////////////////////////////////////////////////////////////////
809	// XS interface functions	1612	// XS interface functions
810		1613
811	MODULE = CBOR::XS PACKAGE = CBOR::XS	1614	MODULE = CBOR::XS PACKAGE = CBOR::XS
812		1615
813	BOOT:	1616	BOOT:
814	{	1617	{
815	cbor_stash = gv_stashpv ("CBOR::XS" , 1);	1618	cbor_stash = gv_stashpv ("CBOR::XS" , 1);
816	cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);
817	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);	1619	cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
818		1620
819	cbor_true = get_bool ("CBOR::XS::true");	1621	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
820	cbor_false = get_bool ("CBOR::XS::false");	1622	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
		1623
		1624	types_true = get_bool ("Types::Serialiser::true" );
		1625	types_false = get_bool ("Types::Serialiser::false");
		1626	types_error = get_bool ("Types::Serialiser::error");
		1627
		1628	default_filter = newSVpv ("CBOR::XS::default_filter", 0);
		1629
		1630	sv_cbor = newSVpv ("CBOR", 0);
		1631	SvREADONLY_on (sv_cbor);
		1632
		1633	assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
821	}	1634	}
822		1635
823	PROTOTYPES: DISABLE	1636	PROTOTYPES: DISABLE
824		1637
825	void CLONE (...)	1638	void CLONE (...)
826	CODE:	1639	CODE:
827	cbor_stash = 0;	1640	cbor_stash = 0;
828	cbor_boolean_stash = 0;
829	cbor_tagged_stash = 0;	1641	cbor_tagged_stash = 0;
		1642	types_error_stash = 0;
		1643	types_boolean_stash = 0;
830		1644
831	void new (char *klass)	1645	void new (char *klass)
832	PPCODE:	1646	PPCODE:
833	{	1647	{
834	SV *pv = NEWSV (0, sizeof (CBOR));	1648	SV *pv = NEWSV (0, sizeof (CBOR));
…		…
842		1656
843	void shrink (CBOR *self, int enable = 1)	1657	void shrink (CBOR *self, int enable = 1)
844	ALIAS:	1658	ALIAS:
845	shrink = F_SHRINK	1659	shrink = F_SHRINK
846	allow_unknown = F_ALLOW_UNKNOWN	1660	allow_unknown = F_ALLOW_UNKNOWN
		1661	allow_sharing = F_ALLOW_SHARING
		1662	allow_cycles = F_ALLOW_CYCLES
		1663	forbid_objects = F_FORBID_OBJECTS
		1664	pack_strings = F_PACK_STRINGS
		1665	text_keys = F_TEXT_KEYS
		1666	text_strings = F_TEXT_STRINGS
		1667	validate_utf8 = F_VALIDATE_UTF8
847	PPCODE:	1668	PPCODE:
848	{	1669	{
849	if (enable)	1670	if (enable)
850	self->flags |= ix;	1671	self->flags |= ix;
851	else	1672	else
…		…
856		1677
857	void get_shrink (CBOR *self)	1678	void get_shrink (CBOR *self)
858	ALIAS:	1679	ALIAS:
859	get_shrink = F_SHRINK	1680	get_shrink = F_SHRINK
860	get_allow_unknown = F_ALLOW_UNKNOWN	1681	get_allow_unknown = F_ALLOW_UNKNOWN
		1682	get_allow_sharing = F_ALLOW_SHARING
		1683	get_allow_cycles = F_ALLOW_CYCLES
		1684	get_forbid_objects = F_FORBID_OBJECTS
		1685	get_pack_strings = F_PACK_STRINGS
		1686	get_text_keys = F_TEXT_KEYS
		1687	get_text_strings = F_TEXT_STRINGS
		1688	get_validate_utf8 = F_VALIDATE_UTF8
861	PPCODE:	1689	PPCODE:
862	XPUSHs (boolSV (self->flags & ix));	1690	XPUSHs (boolSV (self->flags & ix));
863		1691
864	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1692	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
865	PPCODE:	1693	PPCODE:
…		…
881	CODE:	1709	CODE:
882	RETVAL = self->max_size;	1710	RETVAL = self->max_size;
883	OUTPUT:	1711	OUTPUT:
884	RETVAL	1712	RETVAL
885		1713
886	#if 0 //TODO	1714	void filter (CBOR *self, SV *filter = 0)
887
888	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
889	PPCODE:	1715	PPCODE:
890	{
891	SvREFCNT_dec (self->cb_object);	1716	SvREFCNT_dec (self->filter);
892	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1717	self->filter = filter ? newSVsv (filter) : filter;
893
894	XPUSHs (ST (0));	1718	XPUSHs (ST (0));
895	}
896		1719
897	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1720	SV *get_filter (CBOR *self)
898	PPCODE:	1721	CODE:
899	{	1722	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
900	if (!self->cb_sk_object)	1723	OUTPUT:
901	self->cb_sk_object = newHV ();	1724	RETVAL
902
903	if (SvOK (cb))
904	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
905	else
906	{
907	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
908
909	if (!HvKEYS (self->cb_sk_object))
910	{
911	SvREFCNT_dec (self->cb_sk_object);
912	self->cb_sk_object = 0;
913	}
914	}
915
916	XPUSHs (ST (0));
917	}
918
919	#endif
920		1725
921	void encode (CBOR *self, SV *scalar)	1726	void encode (CBOR *self, SV *scalar)
922	PPCODE:	1727	PPCODE:
923	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1728	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
924	XPUSHs (scalar);	1729	XPUSHs (scalar);
…		…
937	EXTEND (SP, 2);	1742	EXTEND (SP, 2);
938	PUSHs (sv);	1743	PUSHs (sv);
939	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1744	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
940	}	1745	}
941		1746
942	#if 0	1747	void incr_parse (CBOR *self, SV *cborstr)
		1748	ALIAS:
		1749	incr_parse_multiple = 1
		1750	PPCODE:
		1751	{
		1752	if (SvUTF8 (cborstr))
		1753	sv_utf8_downgrade (cborstr, 0);
		1754
		1755	if (!self->incr_count)
		1756	{
		1757	self->incr_count = newAV ();
		1758	self->incr_pos = 0;
		1759	self->incr_need = 1;
		1760
		1761	av_push (self->incr_count, newSViv (1));
		1762	}
		1763
		1764	do
		1765	{
		1766	if (!incr_parse (self, cborstr))
		1767	{
		1768	if (self->incr_need > self->max_size && self->max_size)
		1769	croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
		1770	(unsigned long)self->incr_need, (unsigned long)self->max_size);
		1771
		1772	break;
		1773	}
		1774
		1775	SV *sv;
		1776	char *offset;
		1777
		1778	PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN;
		1779	XPUSHs (sv);
		1780
		1781	sv_chop (cborstr, offset);
		1782
		1783	av_clear (self->incr_count);
		1784	av_push (self->incr_count, newSViv (1));
		1785
		1786	self->incr_pos = 0;
		1787	self->incr_need = self->incr_pos + 1;
		1788	}
		1789	while (ix);
		1790	}
		1791
		1792	void incr_reset (CBOR *self)
		1793	CODE:
		1794	{
		1795	SvREFCNT_dec (self->incr_count);
		1796	self->incr_count = 0;
		1797	}
943		1798
944	void DESTROY (CBOR *self)	1799	void DESTROY (CBOR *self)
945	CODE:	1800	PPCODE:
946	SvREFCNT_dec (self->cb_sk_object);	1801	cbor_free (self);
947	SvREFCNT_dec (self->cb_object);
948
949	#endif
950		1802
951	PROTOTYPES: ENABLE	1803	PROTOTYPES: ENABLE
952		1804
953	void encode_cbor (SV *scalar)	1805	void encode_cbor (SV *scalar)
		1806	ALIAS:
		1807	encode_cbor = 0
		1808	encode_cbor_sharing = F_ALLOW_SHARING
954	PPCODE:	1809	PPCODE:
955	{	1810	{
956	CBOR cbor;	1811	CBOR cbor;
957	cbor_init (&cbor);	1812	cbor_init (&cbor);
		1813	cbor.flags |= ix;
958	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1814	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
959	XPUSHs (scalar);	1815	XPUSHs (scalar);
960	}	1816	}
961		1817
962	void decode_cbor (SV *cborstr)	1818	void decode_cbor (SV *cborstr)
…		…
966	cbor_init (&cbor);	1822	cbor_init (&cbor);
967	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1823	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
968	XPUSHs (cborstr);	1824	XPUSHs (cborstr);
969	}	1825	}
970		1826
		1827	#ifdef __AFL_COMPILER
		1828
		1829	void
		1830	afl_init ()
		1831	CODE:
		1832	__AFL_INIT ();
		1833
		1834	int
		1835	afl_loop (unsigned int count = 10000)
		1836	CODE:
		1837	RETVAL = __AFL_LOOP (count);
		1838	OUTPUT:
		1839	RETVAL
		1840
		1841	#endif
		1842

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines