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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.10 by root, Sun Oct 27 20:40:25 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)
…		…
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, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::	147	static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
66	static SV *types_true, *types_false, *types_error;	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 || types_boolean_stash	580	HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
265	? types_boolean_stash	581	? types_boolean_stash
…		…
269	: gv_stashpv ("Types::Serialiser::Error", 1);	585	: gv_stashpv ("Types::Serialiser::Error", 1);
270	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	586	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
271	? cbor_tagged_stash	587	? cbor_tagged_stash
272	: gv_stashpv ("CBOR::XS::Tagged" , 1);	588	: gv_stashpv ("CBOR::XS::Tagged" , 1);
273		589
		590	HV *stash = SvSTASH (sv);
		591
274	if (SvSTASH (sv) == boolean_stash)	592	if (stash == boolean_stash)
275	encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);	593	{
		594	encode_bool (enc, SvIV (sv));
		595	return;
		596	}
276	else if (SvSTASH (sv) == error_stash)	597	else if (stash == error_stash)
277	encode_ch (enc, 0xe0 | 23);	598	{
		599	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
		600	return;
		601	}
278	else if (SvSTASH (sv) == tagged_stash)	602	else if (stash == tagged_stash)
279	{	603	{
280	if (svt != SVt_PVAV)	604	if (svt != SVt_PVAV)
281	croak ("encountered CBOR::XS::Tagged object that isn't an array");	605	croak ("encountered CBOR::XS::Tagged object that isn't an array");
282		606
		607	switch (av_len ((AV *)sv))
		608	{
		609	case 2-1:
		610	// actually a tagged value
283	encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));	611	encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
284	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;
285	}	641	}
286	else	642	else
287	{	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);
288	// 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
289	GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
290
291	if (to_cbor)
292	{
293	dSP;
294
295	ENTER; SAVETMPS; PUSHMARK (SP);
296	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	665	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
297		666
298	// calling with G_SCALAR ensures that we always get a 1 return value
299	PUTBACK;	667	PUTBACK;
		668	// G_SCALAR ensures that return value is 1
300	call_sv ((SV *)GvCV (to_cbor), G_SCALAR);	669	call_sv ((SV *)GvCV (method), G_SCALAR);
301	SPAGAIN;	670	SPAGAIN;
302		671
303	// catch this surprisingly common error	672	// catch this surprisingly common error
304	if (SvROK (TOPs) && SvRV (TOPs) == sv)	673	if (SvROK (TOPs) && SvRV (TOPs) == sv)
305	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));
306		675
307	sv = POPs;	676	encode_sv (enc, POPs);
		677
308	PUTBACK;	678	PUTBACK;
309		679
310	encode_sv (enc, sv);
311
312	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;
313	}	712	}
		713
		714	PUTBACK;
		715
		716	FREETMPS; LEAVE;
		717	}
314	else	718	else
315	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",
316	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	720	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
317	}
318	}	721	}
319	else if (svt == SVt_PVHV)	722	else if (svt == SVt_PVHV)
320	encode_hv (enc, (HV *)sv);	723	encode_hv (enc, (HV *)sv);
321	else if (svt == SVt_PVAV)	724	else if (svt == SVt_PVAV)
322	encode_av (enc, (AV *)sv);	725	encode_av (enc, (AV *)sv);
323	else if (svt < SVt_PVAV)
324	{
325	STRLEN len = 0;
326	char *pv = svt ? SvPV (sv, len) : 0;
327
328	if (len == 1 && *pv == '1')
329	encode_ch (enc, 0xe0 | 21);
330	else if (len == 1 && *pv == '0')
331	encode_ch (enc, 0xe0 | 20);
332	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
333	encode_ch (enc, 0xe0 | 23);
334	else
335	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
336	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
337	}
338	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
339	encode_ch (enc, 0xe0 | 23);
340	else	726	else
341	croak ("encountered %s, but CBOR can only represent references to arrays or hashes",	727	{
342	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	728	encode_tag (enc, CBOR_TAG_INDIRECTION);
		729	encode_sv (enc, sv);
		730	}
343	}	731	}
344		732
345	static void	733	static void
346	encode_nv (enc_t *enc, SV *sv)	734	encode_nv (enc_t *enc, SV *sv)
347	{	735	{
348	double nv = SvNVX (sv);	736	double nv = SvNVX (sv);
349		737
350	need (enc, 9);	738	need (enc, 9);
351		739
352	if (ecb_expect_false (nv == (U32)nv))	740	if (ecb_expect_false (nv == (NV)(U32)nv))
353	encode_uint (enc, 0x00, (U32)nv);	741	encode_uint (enc, MAJOR_POS_INT, (U32)nv);
354	//TODO: maybe I32?	742	//TODO: maybe I32?
355	else if (ecb_expect_false (nv == (float)nv))	743	else if (ecb_expect_false (nv == (float)nv))
356	{	744	encode_float32 (enc, nv);
357	uint32_t fp = ecb_float_to_binary32 (nv);
358
359	*enc->cur++ = 0xe0 | 26;
360
361	if (!ecb_big_endian ())
362	fp = ecb_bswap32 (fp);
363
364	memcpy (enc->cur, &fp, 4);
365	enc->cur += 4;
366	}
367	else	745	else
368	{	746	encode_float64 (enc, nv);
369	uint64_t fp = ecb_double_to_binary64 (nv);
370
371	*enc->cur++ = 0xe0 | 27;
372
373	if (!ecb_big_endian ())
374	fp = ecb_bswap64 (fp);
375
376	memcpy (enc->cur, &fp, 8);
377	enc->cur += 8;
378	}
379	}	747	}
380		748
381	static void	749	static void
382	encode_sv (enc_t *enc, SV *sv)	750	encode_sv (enc_t *enc, SV *sv)
383	{	751	{
…		…
385		753
386	if (SvPOKp (sv))	754	if (SvPOKp (sv))
387	{	755	{
388	STRLEN len;	756	STRLEN len;
389	char *str = SvPV (sv, len);	757	char *str = SvPV (sv, len);
390	encode_str (enc, SvUTF8 (sv), str, len);	758	encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
391	}	759	}
392	else if (SvNOKp (sv))	760	else if (SvNOKp (sv))
393	encode_nv (enc, sv);	761	encode_nv (enc, sv);
394	else if (SvIOKp (sv))	762	else if (SvIOKp (sv))
395	{	763	encode_int (enc, sv);
396	if (SvIsUV (sv))
397	encode_uint (enc, 0x00, SvUVX (sv));
398	else if (SvIVX (sv) >= 0)
399	encode_uint (enc, 0x00, SvIVX (sv));
400	else
401	encode_uint (enc, 0x20, -(SvIVX (sv) + 1));
402	}
403	else if (SvROK (sv))	764	else if (SvROK (sv))
404	encode_rv (enc, SvRV (sv));	765	encode_rv (enc, SvRV (sv));
405	else if (!SvOK (sv))	766	else if (!SvOK (sv))
406	encode_ch (enc, 0xe0 | 22);	767	encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
407	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)	768	else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
408	encode_ch (enc, 0xe0 | 23);	769	encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
409	else	770	else
410	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",
411	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));	772	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
412	}	773	}
413		774
414	static SV *	775	static SV *
415	encode_cbor (SV *scalar, CBOR *cbor)	776	encode_cbor (SV *scalar, CBOR *cbor)
416	{	777	{
417	enc_t enc;	778	enc_t enc = { 0 };
418		779
419	enc.cbor = *cbor;	780	enc.cbor = *cbor;
420	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	781	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
421	enc.cur = SvPVX (enc.sv);	782	enc.cur = SvPVX (enc.sv);
422	enc.end = SvEND (enc.sv);	783	enc.end = SvEND (enc.sv);
423	enc.depth = 0;
424		784
425	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
426	encode_sv (&enc, scalar);	794	encode_sv (&enc, scalar);
427		795
428	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	796	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
429	*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
430		798
…		…
444	U8 *end; // end of input string	812	U8 *end; // end of input string
445	const char *err; // parse error, if != 0	813	const char *err; // parse error, if != 0
446	CBOR cbor;	814	CBOR cbor;
447	U32 depth; // recursion depth	815	U32 depth; // recursion depth
448	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
449	} dec_t;	821	} dec_t;
450		822
451	#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);
452		830
453	#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;
454		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
455	#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)
456	#define DEC_DEC_DEPTH --dec->depth	860	#define DEC_DEC_DEPTH --dec->depth
457		861
458	static UV	862	static UV
459	decode_uint (dec_t *dec)	863	decode_uint (dec_t *dec)
460	{	864	{
461	switch (*dec->cur & 31)	865	U8 m = *dec->cur & MINOR_MASK;
462	{	866	++dec->cur;
463	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
464	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
465	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
466	return *dec->cur++ & 31;
467		867
468	case 24:	868	if (ecb_expect_true (m < LENGTH_EXT1))
		869	return m;
		870	else if (ecb_expect_true (m == LENGTH_EXT1))
		871	{
469	WANT (2);	872	WANT (1);
470	dec->cur += 2;	873	dec->cur += 1;
471	return dec->cur[-1];	874	return dec->cur[-1];
472		875	}
473	case 25:	876	else if (ecb_expect_true (m == LENGTH_EXT2))
		877	{
474	WANT (3);	878	WANT (2);
475	dec->cur += 3;	879	dec->cur += 2;
476	return (((UV)dec->cur[-2]) << 8)	880	return (((UV)dec->cur[-2]) << 8)
477	| ((UV)dec->cur[-1]);	881	| ((UV)dec->cur[-1]);
478		882	}
479	case 26:	883	else if (ecb_expect_true (m == LENGTH_EXT4))
		884	{
480	WANT (5);	885	WANT (4);
481	dec->cur += 5;	886	dec->cur += 4;
482	return (((UV)dec->cur[-4]) << 24)	887	return (((UV)dec->cur[-4]) << 24)
483	| (((UV)dec->cur[-3]) << 16)	888	| (((UV)dec->cur[-3]) << 16)
484	| (((UV)dec->cur[-2]) << 8)	889	| (((UV)dec->cur[-2]) << 8)
485	| ((UV)dec->cur[-1]);	890	| ((UV)dec->cur[-1]);
486		891	}
487	case 27:	892	else if (ecb_expect_true (m == LENGTH_EXT8))
		893	{
488	WANT (9);	894	WANT (8);
489	dec->cur += 9;	895	dec->cur += 8;
		896
		897	return
		898	#if UVSIZE < 8
		899	0
		900	#else
490	return (((UV)dec->cur[-8]) << 56)	901	(((UV)dec->cur[-8]) << 56)
491	| (((UV)dec->cur[-7]) << 48)	902	| (((UV)dec->cur[-7]) << 48)
492	| (((UV)dec->cur[-6]) << 40)	903	| (((UV)dec->cur[-6]) << 40)
493	| (((UV)dec->cur[-5]) << 32)	904	| (((UV)dec->cur[-5]) << 32)
		905	#endif
494	| (((UV)dec->cur[-4]) << 24)	906	| (((UV)dec->cur[-4]) << 24)
495	| (((UV)dec->cur[-3]) << 16)	907	| (((UV)dec->cur[-3]) << 16)
496	| (((UV)dec->cur[-2]) << 8)	908	| (((UV)dec->cur[-2]) << 8)
497	| ((UV)dec->cur[-1]);	909	| ((UV)dec->cur[-1]);
498		910	}
499	default:	911	else
500	ERR ("corrupted CBOR data (unsupported integer minor encoding)");	912	ERR ("corrupted CBOR data (unsupported integer minor encoding)");
501	}
502		913
503	fail:	914	fail:
504	return 0;	915	return 0;
505	}	916	}
506		917
…		…
511	{	922	{
512	AV *av = newAV ();	923	AV *av = newAV ();
513		924
514	DEC_INC_DEPTH;	925	DEC_INC_DEPTH;
515		926
516	if ((*dec->cur & 31) == 31)	927	if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF))
517	{	928	{
518	++dec->cur;	929	++dec->cur;
519		930
520	for (;;)	931	for (;;)
521	{	932	{
522	WANT (1);	933	WANT (1);
523		934
524	if (*dec->cur == (0xe0 | 31))	935	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
525	{	936	{
526	++dec->cur;	937	++dec->cur;
527	break;	938	break;
528	}	939	}
529		940
530	av_push (av, decode_sv (dec));	941	av_push (av, decode_sv (dec));
531	}	942	}
532	}	943	}
533	else	944	else
534	{	945	{
535	int i, len = decode_uint (dec);	946	UV i, len = decode_uint (dec);
536		947
		948	WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
537	av_fill (av, len - 1);	949	av_fill (av, len - 1);
538		950
539	for (i = 0; i < len; ++i)	951	for (i = 0; i < len; ++i)
540	AvARRAY (av)[i] = decode_sv (dec);	952	AvARRAY (av)[i] = decode_sv (dec);
541	}	953	}
542		954
543	DEC_DEC_DEPTH;	955	DEC_DEC_DEPTH;
544	return newRV_noinc ((SV *)av);	956	return newRV_noinc ((SV *)av);
545		957
546	fail:	958	fail:
547	SvREFCNT_dec (av);	959	SvREFCNT_dec_NN (av);
548	DEC_DEC_DEPTH;	960	DEC_DEC_DEPTH;
549	return &PL_sv_undef;	961	return &PL_sv_undef;
550	}	962	}
551		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
552	static SV *	1038	static SV *
553	decode_hv (dec_t *dec)	1039	decode_hv (dec_t *dec)
554	{	1040	{
555	HV *hv = newHV ();	1041	HV *hv = newHV ();
556		1042
557	DEC_INC_DEPTH;	1043	DEC_INC_DEPTH;
558		1044
559	if ((*dec->cur & 31) == 31)	1045	if (*dec->cur == (MAJOR_MAP | MINOR_INDEF))
560	{	1046	{
561	++dec->cur;	1047	++dec->cur;
562		1048
563	for (;;)	1049	for (;;)
564	{	1050	{
565	WANT (1);	1051	WANT (1);
566		1052
567	if (*dec->cur == (0xe0 | 31))	1053	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
568	{	1054	{
569	++dec->cur;	1055	++dec->cur;
570	break;	1056	break;
571	}	1057	}
572		1058
573	SV *k = decode_sv (dec);	1059	decode_he (dec, hv);
574	SV *v = decode_sv (dec);
575
576	hv_store_ent (hv, k, v, 0);
577	}	1060	}
578	}	1061	}
579	else	1062	else
580	{	1063	{
581	int len = decode_uint (dec);	1064	UV pairs = decode_uint (dec);
582		1065
		1066	WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
		1067
583	while (len--)	1068	while (pairs--)
584	{	1069	decode_he (dec, hv);
585	SV *k = decode_sv (dec);
586	SV *v = decode_sv (dec);
587
588	hv_store_ent (hv, k, v, 0);
589	}
590	}	1070	}
591		1071
592	DEC_DEC_DEPTH;	1072	DEC_DEC_DEPTH;
593	return newRV_noinc ((SV *)hv);	1073	return newRV_noinc ((SV *)hv);
594		1074
595	fail:	1075	fail:
596	SvREFCNT_dec (hv);	1076	SvREFCNT_dec_NN (hv);
597	DEC_DEC_DEPTH;	1077	DEC_DEC_DEPTH;
598	return &PL_sv_undef;	1078	return &PL_sv_undef;
599	}	1079	}
600		1080
601	static SV *	1081	static SV *
602	decode_str (dec_t *dec, int utf8)	1082	decode_str (dec_t *dec, int utf8)
603	{	1083	{
604	SV *sv = 0;	1084	SV *sv = 0;
605		1085
606	if ((*dec->cur & 31) == 31)	1086	if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
607	{	1087	{
		1088	// indefinite length strings
608	++dec->cur;	1089	++dec->cur;
609		1090
		1091	U8 major = *dec->cur & MAJOR_MISC;
		1092
610	sv = newSVpvn ("", 0);	1093	sv = newSVpvn ("", 0);
611		1094
612	// not very fast, and certainly not robust against illegal input
613	for (;;)	1095	for (;;)
614	{	1096	{
615	WANT (1);	1097	WANT (1);
616		1098
617	if (*dec->cur == (0xe0 | 31))	1099	if ((*dec->cur - major) > LENGTH_EXT8)
		1100	if (*dec->cur == (MAJOR_MISC | MINOR_INDEF))
618	{	1101	{
619	++dec->cur;	1102	++dec->cur;
620	break;	1103	break;
621	}	1104	}
		1105	else
		1106	ERR ("corrupted CBOR data (invalid chunks in indefinite length string)");
622		1107
623	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;
624	}	1113	}
625	}	1114	}
626	else	1115	else
627	{	1116	{
628	STRLEN len = decode_uint (dec);	1117	STRLEN len = decode_uint (dec);
629		1118
630	WANT (len);	1119	WANT (len);
631	sv = newSVpvn (dec->cur, len);	1120	sv = newSVpvn (dec->cur, len);
632	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));
633	}	1126	}
634		1127
635	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
636	SvUTF8_on (sv);	1134	SvUTF8_on (sv);
		1135	}
637		1136
638	return sv;	1137	return sv;
639		1138
640	fail:	1139	fail:
641	SvREFCNT_dec (sv);	1140	SvREFCNT_dec (sv);
…		…
643	}	1142	}
644		1143
645	static SV *	1144	static SV *
646	decode_tagged (dec_t *dec)	1145	decode_tagged (dec_t *dec)
647	{	1146	{
		1147	SV *sv = 0;
648	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:
649	SV *sv = decode_sv (dec);	1155	sv = decode_sv (dec);
		1156	break;
650		1157
651	if (tag == CBOR_TAG_MAGIC)	1158	case CBOR_TAG_INDIRECTION:
652	return sv;	1159	sv = newRV_noinc (decode_sv (dec));
		1160	break;
653		1161
654	if (tag == CBOR_TAG_PERL_OBJECT)	1162	case CBOR_TAG_STRINGREF_NAMESPACE:
655	{	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
656	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)	1239	if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
657	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;
658		1284	}
659	// TODO	1285	break;
660	}
661		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	{
662	AV *av = newAV ();	1321	AV *av = newAV ();
663	av_push (av, newSVuv (tag));	1322	av_push (av, tag_sv);
664	av_push (av, sv);	1323	av_push (av, sv);
665		1324
666	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash	1325	HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
667	? cbor_tagged_stash	1326	? cbor_tagged_stash
668	: gv_stashpv ("CBOR::XS::Tagged" , 1);	1327	: gv_stashpv ("CBOR::XS::Tagged" , 1);
669
670	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;
671		1339
672	fail:	1340	fail:
673	SvREFCNT_dec (sv);	1341	SvREFCNT_dec (sv);
674	return &PL_sv_undef;	1342	return &PL_sv_undef;
675	}	1343	}
…		…
677	static SV *	1345	static SV *
678	decode_sv (dec_t *dec)	1346	decode_sv (dec_t *dec)
679	{	1347	{
680	WANT (1);	1348	WANT (1);
681		1349
682	switch (*dec->cur >> 5)	1350	switch (*dec->cur >> MAJOR_SHIFT)
683	{	1351	{
684	case 0: // unsigned int	1352	case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec));
685	return newSVuv (decode_uint (dec));	1353	case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec));
686	case 1: // negative int	1354	case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0);
687	return newSViv (-1 - (IV)decode_uint (dec));	1355	case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1);
688	case 2: // octet string	1356	case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec);
689	return decode_str (dec, 0);	1357	case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec);
690	case 3: // utf-8 string	1358	case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec);
691	return decode_str (dec, 1);	1359
692	case 4: // array	1360	case MAJOR_MISC >> MAJOR_SHIFT:
693	return decode_av (dec);
694	case 5: // map
695	return decode_hv (dec);
696	case 6: // tag
697	return decode_tagged (dec);
698	case 7: // misc
699	switch (*dec->cur++ & 31)	1361	switch (*dec->cur++ & MINOR_MASK)
700	{	1362	{
701	case 20:	1363	case SIMPLE_FALSE:
702	#if CBOR_SLOW	1364	#if CBOR_SLOW
703	types_false = get_bool ("Types::Serialiser::false");	1365	types_false = get_bool ("Types::Serialiser::false");
704	#endif	1366	#endif
705	return newSVsv (types_false);	1367	return newSVsv (types_false);
706	case 21:	1368	case SIMPLE_TRUE:
707	#if CBOR_SLOW	1369	#if CBOR_SLOW
708	types_true = get_bool ("Types::Serialiser::true");	1370	types_true = get_bool ("Types::Serialiser::true");
709	#endif	1371	#endif
710	return newSVsv (types_true);	1372	return newSVsv (types_true);
711	case 22:	1373	case SIMPLE_NULL:
712	return newSVsv (&PL_sv_undef);	1374	return newSVsv (&PL_sv_undef);
713	case 23:	1375	case SIMPLE_UNDEF:
714	#if CBOR_SLOW	1376	#if CBOR_SLOW
715	types_error = get_bool ("Types::Serialiser::error");	1377	types_error = get_bool ("Types::Serialiser::error");
716	#endif	1378	#endif
717	return newSVsv (types_error);	1379	return newSVsv (types_error);
718		1380
719	case 25:	1381	case MISC_FLOAT16:
720	{	1382	{
721	WANT (2);	1383	WANT (2);
722		1384
723	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];	1385	uint16_t fp = (dec->cur[0] << 8) | dec->cur[1];
724	dec->cur += 2;	1386	dec->cur += 2;
725		1387
726	return newSVnv (ecb_binary16_to_float (fp));	1388	return newSVnv (ecb_binary16_to_float (fp));
727	}	1389	}
728		1390
729	case 26:	1391	case MISC_FLOAT32:
730	{	1392	{
731	uint32_t fp;	1393	uint32_t fp;
732	WANT (4);	1394	WANT (4);
733	memcpy (&fp, dec->cur, 4);	1395	memcpy (&fp, dec->cur, 4);
734	dec->cur += 4;	1396	dec->cur += 4;
…		…
737	fp = ecb_bswap32 (fp);	1399	fp = ecb_bswap32 (fp);
738		1400
739	return newSVnv (ecb_binary32_to_float (fp));	1401	return newSVnv (ecb_binary32_to_float (fp));
740	}	1402	}
741		1403
742	case 27:	1404	case MISC_FLOAT64:
743	{	1405	{
744	uint64_t fp;	1406	uint64_t fp;
745	WANT (8);	1407	WANT (8);
746	memcpy (&fp, dec->cur, 8);	1408	memcpy (&fp, dec->cur, 8);
747	dec->cur += 8;	1409	dec->cur += 8;
…		…
750	fp = ecb_bswap64 (fp);	1412	fp = ecb_bswap64 (fp);
751		1413
752	return newSVnv (ecb_binary64_to_double (fp));	1414	return newSVnv (ecb_binary64_to_double (fp));
753	}	1415	}
754		1416
755	// 0..19 unassigned	1417	// 0..19 unassigned simple
756	// 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
757	default:	1421	default:
758	ERR ("corrupted CBOR data (reserved/unassigned major 7 value)");	1422	ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)");
759	}	1423	}
760		1424
761	break;	1425	break;
762	}	1426	}
763		1427
…		…
766	}	1430	}
767		1431
768	static SV *	1432	static SV *
769	decode_cbor (SV *string, CBOR *cbor, char **offset_return)	1433	decode_cbor (SV *string, CBOR *cbor, char **offset_return)
770	{	1434	{
771	dec_t dec;	1435	dec_t dec = { 0 };
772	SV *sv;	1436	SV *sv;
		1437	STRLEN len;
		1438	char *data = SvPVbyte (string, len);
773		1439
774	/* work around bugs in 5.10 where manipulating magic values
775	* makes perl ignore the magic in subsequent accesses.
776	* also make a copy of non-PV values, to get them into a clean
777	* state (SvPV should do that, but it's buggy, see below).
778	*/
779	/*SvGETMAGIC (string);*/
780	if (SvMAGICAL (string) || !SvPOK (string))
781	string = sv_2mortal (newSVsv (string));
782
783	SvUPGRADE (string, SVt_PV);
784
785	/* work around a bug in perl 5.10, which causes SvCUR to fail an
786	* assertion with -DDEBUGGING, although SvCUR is documented to
787	* return the xpv_cur field which certainly exists after upgrading.
788	* according to nicholas clark, calling SvPOK fixes this.
789	* But it doesn't fix it, so try another workaround, call SvPV_nolen
790	* and hope for the best.
791	* Damnit, SvPV_nolen still trips over yet another assertion. This
792	* assertion business is seriously broken, try yet another workaround
793	* for the broken -DDEBUGGING.
794	*/
795	{
796	#ifdef DEBUGGING
797	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
798	#else
799	STRLEN offset = SvCUR (string);
800	#endif
801
802	if (offset > cbor->max_size && cbor->max_size)	1440	if (len > cbor->max_size && cbor->max_size)
803	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",
804	(unsigned long)SvCUR (string), (unsigned long)cbor->max_size);	1442	(unsigned long)len, (unsigned long)cbor->max_size);
805	}
806
807	sv_utf8_downgrade (string, 0);
808		1443
809	dec.cbor = *cbor;	1444	dec.cbor = *cbor;
810	dec.cur = (U8 *)SvPVX (string);	1445	dec.cur = (U8 *)data;
811	dec.end = (U8 *)SvEND (string);	1446	dec.end = (U8 *)data + len;
812	dec.err = 0;
813	dec.depth = 0;
814		1447
815	sv = decode_sv (&dec);	1448	sv = decode_sv (&dec);
816		1449
817	if (offset_return)	1450	if (offset_return)
818	*offset_return = dec.cur;	1451	*offset_return = dec.cur;
…		…
821	if (dec.cur != dec.end && !dec.err)	1454	if (dec.cur != dec.end && !dec.err)
822	dec.err = "garbage after CBOR object";	1455	dec.err = "garbage after CBOR object";
823		1456
824	if (dec.err)	1457	if (dec.err)
825	{	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
826	SvREFCNT_dec (sv);	1470	SvREFCNT_dec_NN (sv);
		1471
		1472	if (dec.err_sv)
		1473	sv_2mortal (dec.err_sv);
		1474
827	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);
828	}	1476	}
829		1477
830	sv = sv_2mortal (sv);	1478	sv = sv_2mortal (sv);
831		1479
832	return sv;	1480	return sv;
833	}	1481	}
834		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
835	/////////////////////////////////////////////////////////////////////////////	1607	/////////////////////////////////////////////////////////////////////////////
836	// XS interface functions	1608	// XS interface functions
837		1609
838	MODULE = CBOR::XS PACKAGE = CBOR::XS	1610	MODULE = CBOR::XS PACKAGE = CBOR::XS
839		1611
…		…
846	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);	1618	types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
847		1619
848	types_true = get_bool ("Types::Serialiser::true" );	1620	types_true = get_bool ("Types::Serialiser::true" );
849	types_false = get_bool ("Types::Serialiser::false");	1621	types_false = get_bool ("Types::Serialiser::false");
850	types_error = get_bool ("Types::Serialiser::error");	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));
851	}	1630	}
852		1631
853	PROTOTYPES: DISABLE	1632	PROTOTYPES: DISABLE
854		1633
855	void CLONE (...)	1634	void CLONE (...)
…		…
873		1652
874	void shrink (CBOR *self, int enable = 1)	1653	void shrink (CBOR *self, int enable = 1)
875	ALIAS:	1654	ALIAS:
876	shrink = F_SHRINK	1655	shrink = F_SHRINK
877	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
878	PPCODE:	1664	PPCODE:
879	{	1665	{
880	if (enable)	1666	if (enable)
881	self->flags |= ix;	1667	self->flags |= ix;
882	else	1668	else
…		…
887		1673
888	void get_shrink (CBOR *self)	1674	void get_shrink (CBOR *self)
889	ALIAS:	1675	ALIAS:
890	get_shrink = F_SHRINK	1676	get_shrink = F_SHRINK
891	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
892	PPCODE:	1685	PPCODE:
893	XPUSHs (boolSV (self->flags & ix));	1686	XPUSHs (boolSV (self->flags & ix));
894		1687
895	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)	1688	void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
896	PPCODE:	1689	PPCODE:
…		…
912	CODE:	1705	CODE:
913	RETVAL = self->max_size;	1706	RETVAL = self->max_size;
914	OUTPUT:	1707	OUTPUT:
915	RETVAL	1708	RETVAL
916		1709
917	#if 0 //TODO	1710	void filter (CBOR *self, SV *filter = 0)
918
919	void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
920	PPCODE:	1711	PPCODE:
921	{
922	SvREFCNT_dec (self->cb_object);	1712	SvREFCNT_dec (self->filter);
923	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;	1713	self->filter = filter ? newSVsv (filter) : filter;
924
925	XPUSHs (ST (0));	1714	XPUSHs (ST (0));
926	}
927		1715
928	void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef)	1716	SV *get_filter (CBOR *self)
929	PPCODE:	1717	CODE:
930	{	1718	RETVAL = self->filter ? self->filter : NEWSV (0, 0);
931	if (!self->cb_sk_object)	1719	OUTPUT:
932	self->cb_sk_object = newHV ();	1720	RETVAL
933
934	if (SvOK (cb))
935	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
936	else
937	{
938	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
939
940	if (!HvKEYS (self->cb_sk_object))
941	{
942	SvREFCNT_dec (self->cb_sk_object);
943	self->cb_sk_object = 0;
944	}
945	}
946
947	XPUSHs (ST (0));
948	}
949
950	#endif
951		1721
952	void encode (CBOR *self, SV *scalar)	1722	void encode (CBOR *self, SV *scalar)
953	PPCODE:	1723	PPCODE:
954	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;	1724	PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
955	XPUSHs (scalar);	1725	XPUSHs (scalar);
…		…
968	EXTEND (SP, 2);	1738	EXTEND (SP, 2);
969	PUSHs (sv);	1739	PUSHs (sv);
970	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));	1740	PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
971	}	1741	}
972		1742
973	#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	}
974		1794
975	void DESTROY (CBOR *self)	1795	void DESTROY (CBOR *self)
976	CODE:	1796	PPCODE:
977	SvREFCNT_dec (self->cb_sk_object);	1797	cbor_free (self);
978	SvREFCNT_dec (self->cb_object);
979
980	#endif
981		1798
982	PROTOTYPES: ENABLE	1799	PROTOTYPES: ENABLE
983		1800
984	void encode_cbor (SV *scalar)	1801	void encode_cbor (SV *scalar)
		1802	ALIAS:
		1803	encode_cbor = 0
		1804	encode_cbor_sharing = F_ALLOW_SHARING
985	PPCODE:	1805	PPCODE:
986	{	1806	{
987	CBOR cbor;	1807	CBOR cbor;
988	cbor_init (&cbor);	1808	cbor_init (&cbor);
		1809	cbor.flags |= ix;
989	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;	1810	PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN;
990	XPUSHs (scalar);	1811	XPUSHs (scalar);
991	}	1812	}
992		1813
993	void decode_cbor (SV *cborstr)	1814	void decode_cbor (SV *cborstr)
…		…
997	cbor_init (&cbor);	1818	cbor_init (&cbor);
998	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;	1819	PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
999	XPUSHs (cborstr);	1820	XPUSHs (cborstr);
1000	}	1821	}
1001		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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