[ViewVC] Diff of: cvs/JSON-XS/XS.xs

Comparing JSON-XS/XS.xs (file contents):
Revision 1.75 by root, Wed Mar 19 15:37:54 2008 UTC vs.
Revision 1.119 by root, Mon Oct 28 23:19:54 2013 UTC

…		…
12	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)	12	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)
13	# define snprintf _snprintf // C compilers have this in stdio.h	13	# define snprintf _snprintf // C compilers have this in stdio.h
14	#endif	14	#endif
15		15
16	// some old perls do not have this, try to make it work, no	16	// some old perls do not have this, try to make it work, no
17	// guarentees, though. if it breaks, you get to keep the pieces.	17	// guarantees, though. if it breaks, you get to keep the pieces.
18	#ifndef UTF8_MAXBYTES	18	#ifndef UTF8_MAXBYTES
19	# define UTF8_MAXBYTES 13	19	# define UTF8_MAXBYTES 13
20	#endif	20	#endif
21		21
		22	// three extra for rounding, sign, and end of string
22	#define IVUV_MAXCHARS (sizeof (UV) * CHAR_BIT * 28 / 93 + 2)	23	#define IVUV_MAXCHARS (sizeof (UV) * CHAR_BIT * 28 / 93 + 3)
23		24
24	#define F_ASCII 0x00000001UL	25	#define F_ASCII 0x00000001UL
25	#define F_LATIN1 0x00000002UL	26	#define F_LATIN1 0x00000002UL
26	#define F_UTF8 0x00000004UL	27	#define F_UTF8 0x00000004UL
27	#define F_INDENT 0x00000008UL	28	#define F_INDENT 0x00000008UL
…		…
31	#define F_ALLOW_NONREF 0x00000100UL	32	#define F_ALLOW_NONREF 0x00000100UL
32	#define F_SHRINK 0x00000200UL	33	#define F_SHRINK 0x00000200UL
33	#define F_ALLOW_BLESSED 0x00000400UL	34	#define F_ALLOW_BLESSED 0x00000400UL
34	#define F_CONV_BLESSED 0x00000800UL	35	#define F_CONV_BLESSED 0x00000800UL
35	#define F_RELAXED 0x00001000UL	36	#define F_RELAXED 0x00001000UL
36		37	#define F_ALLOW_UNKNOWN 0x00002000UL
37	#define F_MAXDEPTH 0xf8000000UL	38	#define F_ALLOW_TAGS 0x00004000UL
38	#define S_MAXDEPTH 27
39	#define F_MAXSIZE 0x01f00000UL
40	#define S_MAXSIZE 20
41	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing	39	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
42		40
43	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
44	#define DEC_SIZE(flags) (1UL << ((flags & F_MAXSIZE ) >> S_MAXSIZE ))
45
46	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER	41	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER
47	#define F_DEFAULT (9UL << S_MAXDEPTH)
48		42
49	#define INIT_SIZE 32 // initial scalar size to be allocated	43	#define INIT_SIZE 32 // initial scalar size to be allocated
50	#define INDENT_STEP 3 // spaces per indentation level	44	#define INDENT_STEP 3 // spaces per indentation level
51		45
52	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size	46	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size
		47
		48	#define DECODE_WANTS_OCTETS(json) ((json)->flags & F_UTF8)
53		49
54	#define SB do {	50	#define SB do {
55	#define SE } while (0)	51	#define SE } while (0)
56		52
57	#if __GNUC__ >= 3	53	#if __GNUC__ >= 3
…		…
67		63
68	#define IN_RANGE_INC(type,val,beg,end) \	64	#define IN_RANGE_INC(type,val,beg,end) \
69	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \	65	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
70	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))	66	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
71		67
		68	#define ERR_NESTING_EXCEEDED "json text or perl structure exceeds maximum nesting level (max_depth set too low?)"
		69
72	#ifdef USE_ITHREADS	70	#ifdef USE_ITHREADS
73	# define JSON_SLOW 1	71	# define JSON_SLOW 1
74	# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1))	72	# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1))
75	#else	73	#else
76	# define JSON_SLOW 0	74	# define JSON_SLOW 0
77	# define JSON_STASH json_stash	75	# define JSON_STASH json_stash
78	#endif	76	#endif
79		77
		78	// the amount of HEs to allocate on the stack, when sorting keys
		79	#define STACK_HES 64
		80
80	static HV json_stash, json_boolean_stash; // JSON::XS::	81	static HV json_stash, types_boolean_stash; // JSON::XS::
81	static SV json_true, json_false;	82	static SV types_true, types_false, *sv_json;
		83
		84	enum {
		85	INCR_M_WS = 0, // initial whitespace skipping, must be 0
		86	INCR_M_STR, // inside string
		87	INCR_M_BS, // inside backslash
		88	INCR_M_C0, // inside comment in initial whitespace sequence
		89	INCR_M_C1, // inside comment in other places
		90	INCR_M_JSON // outside anything, count nesting
		91	};
		92
		93	#define INCR_DONE(json) ((json)->incr_nest <= 0 && (json)->incr_mode == INCR_M_JSON)
82		94
83	typedef struct {	95	typedef struct {
84	U32 flags;	96	U32 flags;
		97	U32 max_depth;
		98	STRLEN max_size;
		99
85	SV *cb_object;	100	SV *cb_object;
86	HV *cb_sk_object;	101	HV *cb_sk_object;
		102
		103	// for the incremental parser
		104	SV *incr_text; // the source text so far
		105	STRLEN incr_pos; // the current offset into the text
		106	int incr_nest; // {[]}-nesting level
		107	unsigned char incr_mode;
87	} JSON;	108	} JSON;
		109
		110	INLINE void
		111	json_init (JSON *json)
		112	{
		113	Zero (json, 1, JSON);
		114	json->max_depth = 512;
		115	}
88		116
89	/////////////////////////////////////////////////////////////////////////////	117	/////////////////////////////////////////////////////////////////////////////
90	// utility functions	118	// utility functions
91		119
		120	INLINE SV *
		121	get_bool (const char *name)
		122	{
		123	SV *sv = get_sv (name, 1);
		124
		125	SvREADONLY_on (sv);
		126	SvREADONLY_on (SvRV (sv));
		127
		128	return sv;
		129	}
		130
92	INLINE void	131	INLINE void
93	shrink (SV *sv)	132	shrink (SV *sv)
94	{	133	{
95	sv_utf8_downgrade (sv, 1);	134	sv_utf8_downgrade (sv, 1);
		135
96	if (SvLEN (sv) > SvCUR (sv) + 1)	136	if (SvLEN (sv) > SvCUR (sv) + 1)
97	{	137	{
98	#ifdef SvPV_shrink_to_cur	138	#ifdef SvPV_shrink_to_cur
99	SvPV_shrink_to_cur (sv);	139	SvPV_shrink_to_cur (sv);
100	#elif defined (SvPV_renew)	140	#elif defined (SvPV_renew)
…		…
144	*s++ = 0x80 \| ( ch & 0x3f);	184	*s++ = 0x80 \| ( ch & 0x3f);
145		185
146	return s;	186	return s;
147	}	187	}
148		188
		189	// convert offset pointer to character index, sv must be string
		190	static STRLEN
		191	ptr_to_index (SV sv, char offset)
		192	{
		193	return SvUTF8 (sv)
		194	? utf8_distance (offset, SvPVX (sv))
		195	: offset - SvPVX (sv);
		196	}
		197
		198	/////////////////////////////////////////////////////////////////////////////
		199	// fp hell
		200
		201	// scan a group of digits, and a trailing exponent
		202	static void
		203	json_atof_scan1 (const char s, NV accum, int *expo, int postdp, int maxdepth)
		204	{
		205	UV uaccum = 0;
		206	int eaccum = 0;
		207
		208	// if we recurse too deep, skip all remaining digits
		209	// to avoid a stack overflow attack
		210	if (expect_false (--maxdepth <= 0))
		211	while (((U8)*s - '0') < 10)
		212	++s;
		213
		214	for (;;)
		215	{
		216	U8 dig = (U8)*s - '0';
		217
		218	if (expect_false (dig >= 10))
		219	{
		220	if (dig == (U8)((U8)'.' - (U8)'0'))
		221	{
		222	++s;
		223	json_atof_scan1 (s, accum, expo, 1, maxdepth);
		224	}
		225	else if ((dig \| ' ') == 'e' - '0')
		226	{
		227	int exp2 = 0;
		228	int neg = 0;
		229
		230	++s;
		231
		232	if (*s == '-')
		233	{
		234	++s;
		235	neg = 1;
		236	}
		237	else if (*s == '+')
		238	++s;
		239
		240	while ((dig = (U8)*s - '0') < 10)
		241	exp2 = exp2 * 10 + *s++ - '0';
		242
		243	*expo += neg ? -exp2 : exp2;
		244	}
		245
		246	break;
		247	}
		248
		249	++s;
		250
		251	uaccum = uaccum * 10 + dig;
		252	++eaccum;
		253
		254	// if we have too many digits, then recurse for more
		255	// we actually do this for rather few digits
		256	if (uaccum >= (UV_MAX - 9) / 10)
		257	{
		258	if (postdp) *expo -= eaccum;
		259	json_atof_scan1 (s, accum, expo, postdp, maxdepth);
		260	if (postdp) *expo += eaccum;
		261
		262	break;
		263	}
		264	}
		265
		266	// this relies greatly on the quality of the pow ()
		267	// implementation of the platform, but a good
		268	// implementation is hard to beat.
		269	// (IEEE 754 conformant ones are required to be exact)
		270	if (postdp) *expo -= eaccum;
		271	accum += uaccum Perl_pow (10., *expo);
		272	*expo += eaccum;
		273	}
		274
		275	static NV
		276	json_atof (const char *s)
		277	{
		278	NV accum = 0.;
		279	int expo = 0;
		280	int neg = 0;
		281
		282	if (*s == '-')
		283	{
		284	++s;
		285	neg = 1;
		286	}
		287
		288	// a recursion depth of ten gives us >>500 bits
		289	json_atof_scan1 (s, &accum, &expo, 0, 10);
		290
		291	return neg ? -accum : accum;
		292	}
149	/////////////////////////////////////////////////////////////////////////////	293	/////////////////////////////////////////////////////////////////////////////
150	// encoder	294	// encoder
151		295
152	// structure used for encoding JSON	296	// structure used for encoding JSON
153	typedef struct	297	typedef struct
…		…
155	char *cur; // SvPVX (sv) + current output position	299	char *cur; // SvPVX (sv) + current output position
156	char *end; // SvEND (sv)	300	char *end; // SvEND (sv)
157	SV *sv; // result scalar	301	SV *sv; // result scalar
158	JSON json;	302	JSON json;
159	U32 indent; // indentation level	303	U32 indent; // indentation level
160	U32 maxdepth; // max. indentation/recursion level
161	UV limit; // escape character values >= this value when encoding	304	UV limit; // escape character values >= this value when encoding
162	} enc_t;	305	} enc_t;
163		306
164	INLINE void	307	INLINE void
165	need (enc_t *enc, STRLEN len)	308	need (enc_t *enc, STRLEN len)
166	{	309	{
167	if (expect_false (enc->cur + len >= enc->end))	310	if (expect_false (enc->cur + len >= enc->end))
168	{	311	{
169	STRLEN cur = enc->cur - SvPVX (enc->sv);	312	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
170	SvGROW (enc->sv, cur + len + 1);	313	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
171	enc->cur = SvPVX (enc->sv) + cur;	314	enc->cur = SvPVX (enc->sv) + cur;
172	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	315	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
173	}	316	}
174	}	317	}
175		318
…		…
250	(int)((uch - 0x10000) % 0x400 + 0xDC00));	393	(int)((uch - 0x10000) % 0x400 + 0xDC00));
251	enc->cur += 12;	394	enc->cur += 12;
252	}	395	}
253	else	396	else
254	{	397	{
255	static char hexdigit [16] = "0123456789abcdef";
256	need (enc, len += 5);	398	need (enc, len += 5);
257	*enc->cur++ = '\\';	399	*enc->cur++ = '\\';
258	*enc->cur++ = 'u';	400	*enc->cur++ = 'u';
259	*enc->cur++ = hexdigit [ uch >> 12 ];	401	*enc->cur++ = PL_hexdigit [ uch >> 12 ];
260	*enc->cur++ = hexdigit [(uch >> 8) & 15];	402	*enc->cur++ = PL_hexdigit [(uch >> 8) & 15];
261	*enc->cur++ = hexdigit [(uch >> 4) & 15];	403	*enc->cur++ = PL_hexdigit [(uch >> 4) & 15];
262	*enc->cur++ = hexdigit [(uch >> 0) & 15];	404	*enc->cur++ = PL_hexdigit [(uch >> 0) & 15];
263	}	405	}
264		406
265	str += clen;	407	str += clen;
266	}	408	}
267	else if (enc->json.flags & F_LATIN1)	409	else if (enc->json.flags & F_LATIN1)
…		…
338	static void	480	static void
339	encode_av (enc_t enc, AV av)	481	encode_av (enc_t enc, AV av)
340	{	482	{
341	int i, len = av_len (av);	483	int i, len = av_len (av);
342		484
343	if (enc->indent >= enc->maxdepth)	485	if (enc->indent >= enc->json.max_depth)
344	croak ("data structure too deep (hit recursion limit)");	486	croak (ERR_NESTING_EXCEEDED);
345		487
346	encode_ch (enc, '[');	488	encode_ch (enc, '[');
347		489
348	if (len >= 0)	490	if (len >= 0)
349	{	491	{
350	encode_nl (enc); ++enc->indent;	492	encode_nl (enc); ++enc->indent;
351		493
352	for (i = 0; i <= len; ++i)	494	for (i = 0; i <= len; ++i)
…		…
364	encode_comma (enc);	506	encode_comma (enc);
365	}	507	}
366		508
367	encode_nl (enc); --enc->indent; encode_indent (enc);	509	encode_nl (enc); --enc->indent; encode_indent (enc);
368	}	510	}
369		511
370	encode_ch (enc, ']');	512	encode_ch (enc, ']');
371	}	513	}
372		514
373	static void	515	static void
374	encode_hk (enc_t enc, HE he)	516	encode_hk (enc_t enc, HE he)
…		…
378	if (HeKLEN (he) == HEf_SVKEY)	520	if (HeKLEN (he) == HEf_SVKEY)
379	{	521	{
380	SV *sv = HeSVKEY (he);	522	SV *sv = HeSVKEY (he);
381	STRLEN len;	523	STRLEN len;
382	char *str;	524	char *str;
383		525
384	SvGETMAGIC (sv);	526	SvGETMAGIC (sv);
385	str = SvPV (sv, len);	527	str = SvPV (sv, len);
386		528
387	encode_str (enc, str, len, SvUTF8 (sv));	529	encode_str (enc, str, len, SvUTF8 (sv));
388	}	530	}
…		…
423		565
424	static void	566	static void
425	encode_hv (enc_t enc, HV hv)	567	encode_hv (enc_t enc, HV hv)
426	{	568	{
427	HE *he;	569	HE *he;
428	int count;
429		570
430	if (enc->indent >= enc->maxdepth)	571	if (enc->indent >= enc->json.max_depth)
431	croak ("data structure too deep (hit recursion limit)");	572	croak (ERR_NESTING_EXCEEDED);
432		573
433	encode_ch (enc, '{');	574	encode_ch (enc, '{');
434		575
435	// for canonical output we have to sort by keys first	576	// for canonical output we have to sort by keys first
436	// actually, this is mostly due to the stupid so-called	577	// actually, this is mostly due to the stupid so-called
437	// security workaround added somewhere in 5.8.x.	578	// security workaround added somewhere in 5.8.x
438	// that randomises hash orderings	579	// that randomises hash orderings
439	if (enc->json.flags & F_CANONICAL)	580	if (enc->json.flags & F_CANONICAL && !SvRMAGICAL (hv))
440	{	581	{
441	int count = hv_iterinit (hv);	582	int count = hv_iterinit (hv);
442		583
443	if (SvMAGICAL (hv))	584	if (SvMAGICAL (hv))
444	{	585	{
…		…
455	}	596	}
456		597
457	if (count)	598	if (count)
458	{	599	{
459	int i, fast = 1;	600	int i, fast = 1;
460	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)	601	HE *hes_stack [STACK_HES];
461	HE *hes = _alloca (count sizeof (HE));	602	HE **hes = hes_stack;
462	#else	603
463	HE *hes [count]; // if your compiler dies here, you need to enable C99 mode	604	// allocate larger arrays on the heap
464	#endif	605	if (count > STACK_HES)
		606	{
		607	SV sv = sv_2mortal (NEWSV (0, count sizeof (*hes)));
		608	hes = (HE **)SvPVX (sv);
		609	}
465		610
466	i = 0;	611	i = 0;
467	while ((he = hv_iternext (hv)))	612	while ((he = hv_iternext (hv)))
468	{	613	{
469	hes [i++] = he;	614	hes [i++] = he;
…		…
544	SvGETMAGIC (sv);	689	SvGETMAGIC (sv);
545	svt = SvTYPE (sv);	690	svt = SvTYPE (sv);
546		691
547	if (expect_false (SvOBJECT (sv)))	692	if (expect_false (SvOBJECT (sv)))
548	{	693	{
549	HV *stash = !JSON_SLOW \|\| json_boolean_stash	694	HV *boolean_stash = !JSON_SLOW \|\| types_boolean_stash
550	? json_boolean_stash	695	? types_boolean_stash
551	: gv_stashpv ("JSON::XS::Boolean", 1);	696	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		697	HV *stash = SvSTASH (sv);
552		698
553	if (SvSTASH (sv) == stash)	699	if (stash == boolean_stash)
554	{	700	{
555	if (SvIV (sv))	701	if (SvIV (sv))
556	encode_str (enc, "true", 4, 0);	702	encode_str (enc, "true", 4, 0);
557	else	703	else
558	encode_str (enc, "false", 5, 0);	704	encode_str (enc, "false", 5, 0);
559	}	705	}
560	else	706	else if (enc->json.flags & F_CONV_BLESSED)
561	{	707	{
562	#if 0	708	GV *to_json = gv_fetchmethod_autoload (stash, "TO_JSON", 0);
563	if (0 && sv_derived_from (rv, "JSON::Literal"))	709
564	{	710	if (to_json)
565	// not yet
566	}	711	{
567	#endif
568	if (enc->json.flags & F_CONV_BLESSED)
569	{	712	dSP;
		713
		714	ENTER; SAVETMPS; PUSHMARK (SP);
570	// we re-bless the reference to get overload and other niceties right	715	// we re-bless the reference to get overload and other niceties right
571	GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 0);
572
573	if (to_json)
574	{
575	dSP;
576
577	ENTER; SAVETMPS; PUSHMARK (SP);
578	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));	716	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
579		717
580	// calling with G_SCALAR ensures that we always get a 1 return value	718	// calling with G_SCALAR ensures that we always get a 1 return value
581	PUTBACK;	719	PUTBACK;
582	call_sv ((SV *)GvCV (to_json), G_SCALAR);	720	call_sv ((SV *)GvCV (to_json), G_SCALAR);
583	SPAGAIN;	721	SPAGAIN;
584		722
585	// catch this surprisingly common error	723	// catch this surprisingly common error
586	if (SvROK (TOPs) && SvRV (TOPs) == sv)	724	if (SvROK (TOPs) && SvRV (TOPs) == sv)
587	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));	725	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
588		726
589	sv = POPs;	727	sv = POPs;
590	PUTBACK;	728	PUTBACK;
591		729
592	encode_sv (enc, sv);	730	encode_sv (enc, sv);
593		731
594	FREETMPS; LEAVE;	732	FREETMPS; LEAVE;
595	}
596	else if (enc->json.flags & F_ALLOW_BLESSED)
597	encode_str (enc, "null", 4, 0);
598	else
599	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
600	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
601	}	733	}
602	else if (enc->json.flags & F_ALLOW_BLESSED)	734	else if (enc->json.flags & F_ALLOW_BLESSED)
603	encode_str (enc, "null", 4, 0);	735	encode_str (enc, "null", 4, 0);
604	else	736	else
605	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	737	croak ("encountered object '%s' when conv_object is enabled, but TO_JSON is missing and allow_blessed disabled",
606	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	738	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
607	}	739	}
		740	else if (enc->json.flags & F_ALLOW_TAGS)
		741	{
		742	GV *method = gv_fetchmethod_autoload (stash, "FREEZE", 0);
		743
		744	if (method)
		745	{
		746	int count;
		747	dSP;
		748
		749	ENTER; SAVETMPS; PUSHMARK (SP);
		750	EXTEND (SP, 2);
		751	// we re-bless the reference to get overload and other niceties right
		752	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		753	PUSHs (sv_json);
		754
		755	PUTBACK;
		756	count = call_sv ((SV *)GvCV (method), G_ARRAY);
		757	SPAGAIN;
		758
		759	// catch this surprisingly common error
		760	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		761	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		762
		763	encode_ch (enc, '(');
		764	encode_ch (enc, '"');
		765	encode_str (enc, HvNAME (stash), HvNAMELEN (stash), HvNAMEUTF8 (stash));
		766	encode_ch (enc, '"');
		767	encode_ch (enc, ')');
		768	encode_ch (enc, '[');
		769
		770	while (count)
		771	{
		772	encode_sv (enc, SP[1 - count--]);
		773
		774	if (count)
		775	encode_ch (enc, ',');
		776	}
		777
		778	encode_ch (enc, ']');
		779
		780	PUTBACK;
		781
		782	FREETMPS; LEAVE;
		783	}
		784	else if (enc->json.flags & F_ALLOW_BLESSED)
		785	encode_str (enc, "null", 4, 0);
		786	else
		787	croak ("encountered object '%s' when allow_tags is enabled, but FREEZE is missing and allow_blessed disabled",
		788	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		789	}
		790	else if (enc->json.flags & F_ALLOW_BLESSED)
		791	encode_str (enc, "null", 4, 0);
		792	else
		793	croak ("encountered object '%s', but neither allow_blessed, convert_blessed nor allow_tags settings are enabled",
		794	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
608	}	795	}
609	else if (svt == SVt_PVHV)	796	else if (svt == SVt_PVHV)
610	encode_hv (enc, (HV *)sv);	797	encode_hv (enc, (HV *)sv);
611	else if (svt == SVt_PVAV)	798	else if (svt == SVt_PVAV)
612	encode_av (enc, (AV *)sv);	799	encode_av (enc, (AV *)sv);
…		…
617		804
618	if (len == 1 && *pv == '1')	805	if (len == 1 && *pv == '1')
619	encode_str (enc, "true", 4, 0);	806	encode_str (enc, "true", 4, 0);
620	else if (len == 1 && *pv == '0')	807	else if (len == 1 && *pv == '0')
621	encode_str (enc, "false", 5, 0);	808	encode_str (enc, "false", 5, 0);
		809	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		810	encode_str (enc, "null", 4, 0);
622	else	811	else
623	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",	812	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
624	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	813	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
625	}	814	}
		815	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		816	encode_str (enc, "null", 4, 0);
626	else	817	else
627	croak ("encountered %s, but JSON can only represent references to arrays or hashes",	818	croak ("encountered %s, but JSON can only represent references to arrays or hashes",
628	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	819	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
629	}	820	}
630		821
…		…
684	}	875	}
685	else	876	else
686	{	877	{
687	// large integer, use the (rather slow) snprintf way.	878	// large integer, use the (rather slow) snprintf way.
688	need (enc, IVUV_MAXCHARS);	879	need (enc, IVUV_MAXCHARS);
689	enc->cur +=	880	enc->cur +=
690	SvIsUV(sv)	881	SvIsUV(sv)
691	? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv))	882	? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv))
692	: snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv));	883	: snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv));
693	}	884	}
694	}	885	}
695	else if (SvROK (sv))	886	else if (SvROK (sv))
696	encode_rv (enc, SvRV (sv));	887	encode_rv (enc, SvRV (sv));
697	else if (!SvOK (sv))	888	else if (!SvOK (sv) \|\| enc->json.flags & F_ALLOW_UNKNOWN)
698	encode_str (enc, "null", 4, 0);	889	encode_str (enc, "null", 4, 0);
699	else	890	else
700	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",	891	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, check your input data",
701	SvPV_nolen (sv), SvFLAGS (sv));	892	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
702	}	893	}
703		894
704	static SV *	895	static SV *
705	encode_json (SV scalar, JSON json)	896	encode_json (SV scalar, JSON json)
706	{	897	{
…		…
712	enc.json = *json;	903	enc.json = *json;
713	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	904	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
714	enc.cur = SvPVX (enc.sv);	905	enc.cur = SvPVX (enc.sv);
715	enc.end = SvEND (enc.sv);	906	enc.end = SvEND (enc.sv);
716	enc.indent = 0;	907	enc.indent = 0;
717	enc.maxdepth = DEC_DEPTH (enc.json.flags);
718	enc.limit = enc.json.flags & F_ASCII ? 0x000080UL	908	enc.limit = enc.json.flags & F_ASCII ? 0x000080UL
719	: enc.json.flags & F_LATIN1 ? 0x000100UL	909	: enc.json.flags & F_LATIN1 ? 0x000100UL
720	: 0x110000UL;	910	: 0x110000UL;
721		911
722	SvPOK_only (enc.sv);	912	SvPOK_only (enc.sv);
723	encode_sv (&enc, scalar);	913	encode_sv (&enc, scalar);
		914	encode_nl (&enc);
724		915
725	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	916	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
726	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	917	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
727		918
728	if (!(enc.json.flags & (F_ASCII \| F_LATIN1 \| F_UTF8)))	919	if (!(enc.json.flags & (F_ASCII \| F_LATIN1 \| F_UTF8)))
…		…
789	if (*dec->cur != ch) \	980	if (*dec->cur != ch) \
790	ERR (# ch " expected"); \	981	ERR (# ch " expected"); \
791	++dec->cur; \	982	++dec->cur; \
792	SE	983	SE
793		984
794	#define DEC_INC_DEPTH if (++dec->depth > dec->maxdepth) ERR ("json datastructure exceeds maximum nesting level (set a higher max_depth)")	985	#define DEC_INC_DEPTH if (++dec->depth > dec->json.max_depth) ERR (ERR_NESTING_EXCEEDED)
795	#define DEC_DEC_DEPTH --dec->depth	986	#define DEC_DEC_DEPTH --dec->depth
796		987
797	static SV decode_sv (dec_t dec);	988	static SV decode_sv (dec_t dec);
798		989
799	static signed char decode_hexdigit[256];	990	static signed char decode_hexdigit[256];
…		…
908	else if (expect_true (ch >= 0x20 && ch < 0x80))	1099	else if (expect_true (ch >= 0x20 && ch < 0x80))
909	*cur++ = ch;	1100	*cur++ = ch;
910	else if (ch >= 0x80)	1101	else if (ch >= 0x80)
911	{	1102	{
912	STRLEN clen;	1103	STRLEN clen;
913	UV uch;
914		1104
915	--dec_cur;	1105	--dec_cur;
916		1106
917	uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen);	1107	decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
918	if (clen == (STRLEN)-1)	1108	if (clen == (STRLEN)-1)
919	ERR ("malformed UTF-8 character in JSON string");	1109	ERR ("malformed UTF-8 character in JSON string");
920		1110
921	do	1111	do
922	cur++ = dec_cur++;	1112	cur++ = dec_cur++;
…		…
939	{	1129	{
940	STRLEN len = cur - buf;	1130	STRLEN len = cur - buf;
941		1131
942	if (sv)	1132	if (sv)
943	{	1133	{
944	SvGROW (sv, SvCUR (sv) + len + 1);	1134	STRLEN cur = SvCUR (sv);
		1135
		1136	if (SvLEN (sv) <= cur + len)
		1137	SvGROW (sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
		1138
945	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);	1139	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);
946	SvCUR_set (sv, SvCUR (sv) + len);	1140	SvCUR_set (sv, SvCUR (sv) + len);
947	}	1141	}
948	else	1142	else
949	sv = newSVpvn (buf, len);	1143	sv = newSVpvn (buf, len);
…		…
1040		1234
1041	// special case the rather common 1..5-digit-int case	1235	// special case the rather common 1..5-digit-int case
1042	if (*start == '-')	1236	if (*start == '-')
1043	switch (len)	1237	switch (len)
1044	{	1238	{
1045	case 2: return newSViv (-( start [1] - '0' * 1));	1239	case 2: return newSViv (-(IV)( start [1] - '0' * 1));
1046	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));	1240	case 3: return newSViv (-(IV)( start [1] * 10 + start [2] - '0' * 11));
1047	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));	1241	case 4: return newSViv (-(IV)( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
1048	case 5: return newSViv (-( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));	1242	case 5: return newSViv (-(IV)( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
1049	case 6: return newSViv (-(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));	1243	case 6: return newSViv (-(IV)(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));
1050	}	1244	}
1051	else	1245	else
1052	switch (len)	1246	switch (len)
1053	{	1247	{
1054	case 1: return newSViv ( start [0] - '0' * 1);	1248	case 1: return newSViv ( start [0] - '0' * 1);
1055	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);	1249	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
1056	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);	1250	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
1057	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);	1251	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
1058	case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);	1252	case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);
1059	}	1253	}
1060		1254
1061	{	1255	{
1062	UV uv;	1256	UV uv;
1063	int numtype = grok_number (start, len, &uv);	1257	int numtype = grok_number (start, len, &uv);
…		…
1072	}	1266	}
1073		1267
1074	len -= *start == '-' ? 1 : 0;	1268	len -= *start == '-' ? 1 : 0;
1075		1269
1076	// does not fit into IV or UV, try NV	1270	// does not fit into IV or UV, try NV
1077	if ((sizeof (NV) == sizeof (double) && DBL_DIG >= len)	1271	if (len <= NV_DIG)
1078	#if defined (LDBL_DIG)
1079	\|\| (sizeof (NV) == sizeof (long double) && LDBL_DIG >= len)
1080	#endif
1081	)
1082	// fits into NV without loss of precision	1272	// fits into NV without loss of precision
1083	return newSVnv (Atof (start));	1273	return newSVnv (json_atof (start));
1084		1274
1085	// everything else fails, convert it to a string	1275	// everything else fails, convert it to a string
1086	return newSVpvn (start, dec->cur - start);	1276	return newSVpvn (start, dec->cur - start);
1087	}	1277	}
1088		1278
1089	// loss of precision here	1279	// loss of precision here
1090	return newSVnv (Atof (start));	1280	return newSVnv (json_atof (start));
1091		1281
1092	fail:	1282	fail:
1093	return 0;	1283	return 0;
1094	}	1284	}
1095		1285
…		…
1119	if (*dec->cur == ']')	1309	if (*dec->cur == ']')
1120	{	1310	{
1121	++dec->cur;	1311	++dec->cur;
1122	break;	1312	break;
1123	}	1313	}
1124		1314
1125	if (*dec->cur != ',')	1315	if (*dec->cur != ',')
1126	ERR (", or ] expected while parsing array");	1316	ERR (", or ] expected while parsing array");
1127		1317
1128	++dec->cur;	1318	++dec->cur;
1129		1319
…		…
1171	char *p = dec->cur;	1361	char *p = dec->cur;
1172	char *e = p + 24; // only try up to 24 bytes	1362	char *e = p + 24; // only try up to 24 bytes
1173		1363
1174	for (;;)	1364	for (;;)
1175	{	1365	{
1176	// the >= 0x80 is true on most architectures	1366	// the >= 0x80 is false on most architectures
1177	if (p == e \|\| p < 0x20 \|\| p >= 0x80 \|\| *p == '\\')	1367	if (p == e \|\| p < 0x20 \|\| p >= 0x80 \|\| *p == '\\')
1178	{	1368	{
1179	// slow path, back up and use decode_str	1369	// slow path, back up and use decode_str
1180	SV *key = decode_str (dec);	1370	SV *key = decode_str (dec);
1181	if (!key)	1371	if (!key)
…		…
1264	dSP;	1454	dSP;
1265	int count;	1455	int count;
1266		1456
1267	ENTER; SAVETMPS; PUSHMARK (SP);	1457	ENTER; SAVETMPS; PUSHMARK (SP);
1268	XPUSHs (HeVAL (he));	1458	XPUSHs (HeVAL (he));
		1459	sv_2mortal (sv);
1269		1460
1270	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;	1461	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
1271		1462
1272	if (count == 1)	1463	if (count == 1)
1273	{	1464	{
1274	sv = newSVsv (POPs);	1465	sv = newSVsv (POPs);
1275	FREETMPS; LEAVE;	1466	FREETMPS; LEAVE;
1276	return sv;	1467	return sv;
1277	}	1468	}
1278		1469
		1470	SvREFCNT_inc (sv);
1279	FREETMPS; LEAVE;	1471	FREETMPS; LEAVE;
1280	}	1472	}
1281	}	1473	}
1282		1474
1283	if (dec->json.cb_object)	1475	if (dec->json.cb_object)
…		…
1309	DEC_DEC_DEPTH;	1501	DEC_DEC_DEPTH;
1310	return 0;	1502	return 0;
1311	}	1503	}
1312		1504
1313	static SV *	1505	static SV *
		1506	decode_tag (dec_t *dec)
		1507	{
		1508	SV *tag = 0;
		1509	SV *val = 0;
		1510
		1511	if (!(dec->json.flags & F_ALLOW_TAGS))
		1512	ERR ("malformed JSON string, neither array, object, number, string or atom");
		1513
		1514	++dec->cur;
		1515
		1516	tag = decode_sv (dec);
		1517	if (!tag)
		1518	goto fail;
		1519
		1520	if (!SvPOK (tag))
		1521	ERR ("malformed JSON string, (tag) must be a string");
		1522
		1523	if (*dec->cur != ')')
		1524	ERR (") expected after tag");
		1525
		1526	++dec->cur;
		1527
		1528	val = decode_sv (dec);
		1529	if (!val)
		1530	goto fail;
		1531
		1532	if (!SvROK (val) \|\| SvTYPE (SvRV (val)) != SVt_PVAV)
		1533	ERR ("malformed JSON string, tag value must be an array");
		1534
		1535	{
		1536	AV av = (AV )SvRV (val);
		1537	int i, len = av_len (av) + 1;
		1538	HV *stash = gv_stashsv (tag, 0);
		1539	SV *sv;
		1540
		1541	if (!stash)
		1542	ERR ("cannot decode perl-object (package does not exist)");
		1543
		1544	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1545
		1546	if (!method)
		1547	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1548
		1549	dSP;
		1550
		1551	ENTER; SAVETMPS; PUSHMARK (SP);
		1552	EXTEND (SP, len + 2);
		1553	// we re-bless the reference to get overload and other niceties right
		1554	PUSHs (tag);
		1555	PUSHs (sv_json);
		1556
		1557	for (i = 0; i < len; ++i)
		1558	PUSHs (*av_fetch (av, i, 1));
		1559
		1560	PUTBACK;
		1561	call_sv ((SV *)GvCV (method), G_SCALAR);
		1562	SPAGAIN;
		1563
		1564	SvREFCNT_dec (tag);
		1565	SvREFCNT_dec (val);
		1566	sv = SvREFCNT_inc (POPs);
		1567
		1568	PUTBACK;
		1569
		1570	FREETMPS; LEAVE;
		1571
		1572	return sv;
		1573	}
		1574
		1575	fail:
		1576	SvREFCNT_dec (tag);
		1577	SvREFCNT_dec (val);
		1578	return 0;
		1579	}
		1580
		1581	static SV *
1314	decode_sv (dec_t *dec)	1582	decode_sv (dec_t *dec)
1315	{	1583	{
1316	// the beauty of JSON: you need exactly one character lookahead	1584	// the beauty of JSON: you need exactly one character lookahead
1317	// to parse everything.	1585	// to parse everything.
1318	switch (*dec->cur)	1586	switch (*dec->cur)
1319	{	1587	{
1320	case '"': ++dec->cur; return decode_str (dec);	1588	case '"': ++dec->cur; return decode_str (dec);
1321	case '[': ++dec->cur; return decode_av (dec);	1589	case '[': ++dec->cur; return decode_av (dec);
1322	case '{': ++dec->cur; return decode_hv (dec);	1590	case '{': ++dec->cur; return decode_hv (dec);
		1591	case '(': return decode_tag (dec);
1323		1592
1324	case '-':	1593	case '-':
1325	case '0': case '1': case '2': case '3': case '4':	1594	case '0': case '1': case '2': case '3': case '4':
1326	case '5': case '6': case '7': case '8': case '9':	1595	case '5': case '6': case '7': case '8': case '9':
1327	return decode_num (dec);	1596	return decode_num (dec);
…		…
1329	case 't':	1598	case 't':
1330	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1599	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
1331	{	1600	{
1332	dec->cur += 4;	1601	dec->cur += 4;
1333	#if JSON_SLOW	1602	#if JSON_SLOW
1334	json_true = get_sv ("JSON::XS::true", 1); SvREADONLY_on (json_true);	1603	types_true = get_bool ("Types::Serialiser::true");
1335	#endif	1604	#endif
1336	return SvREFCNT_inc (json_true);	1605	return newSVsv (types_true);
1337	}	1606	}
1338	else	1607	else
1339	ERR ("'true' expected");	1608	ERR ("'true' expected");
1340		1609
1341	break;	1610	break;
…		…
1343	case 'f':	1612	case 'f':
1344	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))	1613	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
1345	{	1614	{
1346	dec->cur += 5;	1615	dec->cur += 5;
1347	#if JSON_SLOW	1616	#if JSON_SLOW
1348	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);	1617	types_false = get_bool ("Types::Serialiser::false");
1349	#endif	1618	#endif
1350	return SvREFCNT_inc (json_false);	1619	return newSVsv (types_false);
1351	}	1620	}
1352	else	1621	else
1353	ERR ("'false' expected");	1622	ERR ("'false' expected");
1354		1623
1355	break;	1624	break;
…		…
1364	ERR ("'null' expected");	1633	ERR ("'null' expected");
1365		1634
1366	break;	1635	break;
1367		1636
1368	default:	1637	default:
1369	ERR ("malformed JSON string, neither array, object, number, string or atom");	1638	ERR ("malformed JSON string, neither tag, array, object, number, string or atom");
1370	break;	1639	break;
1371	}	1640	}
1372		1641
1373	fail:	1642	fail:
1374	return 0;	1643	return 0;
1375	}	1644	}
1376		1645
1377	static SV *	1646	static SV *
1378	decode_json (SV string, JSON json, UV *offset_return)	1647	decode_json (SV string, JSON json, char **offset_return)
1379	{	1648	{
1380	dec_t dec;	1649	dec_t dec;
1381	UV offset;
1382	SV *sv;	1650	SV *sv;
1383		1651
		1652	/* work around bugs in 5.10 where manipulating magic values
		1653	* makes perl ignore the magic in subsequent accesses.
		1654	* also make a copy of non-PV values, to get them into a clean
		1655	* state (SvPV should do that, but it's buggy, see below).
		1656	*/
1384	SvGETMAGIC (string);	1657	/SvGETMAGIC (string);/
		1658	if (SvMAGICAL (string) \|\| !SvPOK (string))
		1659	string = sv_2mortal (newSVsv (string));
		1660
1385	SvUPGRADE (string, SVt_PV);	1661	SvUPGRADE (string, SVt_PV);
1386		1662
1387	if (json->flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (json->flags))	1663	/* work around a bug in perl 5.10, which causes SvCUR to fail an
		1664	* assertion with -DDEBUGGING, although SvCUR is documented to
		1665	* return the xpv_cur field which certainly exists after upgrading.
		1666	* according to nicholas clark, calling SvPOK fixes this.
		1667	* But it doesn't fix it, so try another workaround, call SvPV_nolen
		1668	* and hope for the best.
		1669	* Damnit, SvPV_nolen still trips over yet another assertion. This
		1670	* assertion business is seriously broken, try yet another workaround
		1671	* for the broken -DDEBUGGING.
		1672	*/
		1673	{
		1674	#ifdef DEBUGGING
		1675	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
		1676	#else
		1677	STRLEN offset = SvCUR (string);
		1678	#endif
		1679
		1680	if (offset > json->max_size && json->max_size)
1388	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",	1681	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
1389	(unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (json->flags));	1682	(unsigned long)SvCUR (string), (unsigned long)json->max_size);
		1683	}
1390		1684
1391	if (json->flags & F_UTF8)	1685	if (DECODE_WANTS_OCTETS (json))
1392	sv_utf8_downgrade (string, 0);	1686	sv_utf8_downgrade (string, 0);
1393	else	1687	else
1394	sv_utf8_upgrade (string);	1688	sv_utf8_upgrade (string);
1395		1689
1396	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1690	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
1397		1691
1398	dec.json = *json;	1692	dec.json = *json;
1399	dec.cur = SvPVX (string);	1693	dec.cur = SvPVX (string);
1400	dec.end = SvEND (string);	1694	dec.end = SvEND (string);
1401	dec.err = 0;	1695	dec.err = 0;
1402	dec.depth = 0;	1696	dec.depth = 0;
1403	dec.maxdepth = DEC_DEPTH (dec.json.flags);
1404		1697
1405	if (dec.json.cb_object \|\| dec.json.cb_sk_object)	1698	if (dec.json.cb_object \|\| dec.json.cb_sk_object)
1406	dec.json.flags \|= F_HOOK;	1699	dec.json.flags \|= F_HOOK;
1407		1700
1408	*dec.end = 0; // this should basically be a nop, too, but make sure it's there	1701	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
1409		1702
1410	decode_ws (&dec);	1703	decode_ws (&dec);
1411	sv = decode_sv (&dec);	1704	sv = decode_sv (&dec);
		1705
		1706	if (offset_return)
		1707	*offset_return = dec.cur;
1412		1708
1413	if (!(offset_return \|\| !sv))	1709	if (!(offset_return \|\| !sv))
1414	{	1710	{
1415	// check for trailing garbage	1711	// check for trailing garbage
1416	decode_ws (&dec);	1712	decode_ws (&dec);
…		…
1419	{	1715	{
1420	dec.err = "garbage after JSON object";	1716	dec.err = "garbage after JSON object";
1421	SvREFCNT_dec (sv);	1717	SvREFCNT_dec (sv);
1422	sv = 0;	1718	sv = 0;
1423	}	1719	}
1424	}
1425
1426	if (offset_return \|\| !sv)
1427	{
1428	offset = dec.json.flags & F_UTF8
1429	? dec.cur - SvPVX (string)
1430	: utf8_distance (dec.cur, SvPVX (string));
1431
1432	if (offset_return)
1433	*offset_return = offset;
1434	}	1720	}
1435		1721
1436	if (!sv)	1722	if (!sv)
1437	{	1723	{
1438	SV *uni = sv_newmortal ();	1724	SV *uni = sv_newmortal ();
…		…
1444	SAVEVPTR (PL_curcop);	1730	SAVEVPTR (PL_curcop);
1445	PL_curcop = &cop;	1731	PL_curcop = &cop;
1446	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);	1732	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);
1447	LEAVE;	1733	LEAVE;
1448		1734
1449	croak ("%s, at character offset %d [\"%s\"]",	1735	croak ("%s, at character offset %d (before \"%s\")",
1450	dec.err,	1736	dec.err,
1451	(int)offset,	1737	(int)ptr_to_index (string, dec.cur),
1452	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1738	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
1453	}	1739	}
1454		1740
1455	sv = sv_2mortal (sv);	1741	sv = sv_2mortal (sv);
1456		1742
1457	if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))	1743	if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))
1458	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");	1744	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
1459		1745
1460	return sv;	1746	return sv;
		1747	}
		1748
		1749	/////////////////////////////////////////////////////////////////////////////
		1750	// incremental parser
		1751
		1752	static void
		1753	incr_parse (JSON *self)
		1754	{
		1755	const char *p = SvPVX (self->incr_text) + self->incr_pos;
		1756
		1757	// the state machine here is a bit convoluted and could be simplified a lot
		1758	// but this would make it slower, so...
		1759
		1760	for (;;)
		1761	{
		1762	//printf ("loop pod %d p<%c><%s>, mode %d nest %d\n", p - SvPVX (self->incr_text), p, p, self->incr_mode, self->incr_nest);//D
		1763	switch (self->incr_mode)
		1764	{
		1765	// only used for initial whitespace skipping
		1766	case INCR_M_WS:
		1767	for (;;)
		1768	{
		1769	if (*p > 0x20)
		1770	{
		1771	if (*p == '#')
		1772	{
		1773	self->incr_mode = INCR_M_C0;
		1774	goto incr_m_c;
		1775	}
		1776	else
		1777	{
		1778	self->incr_mode = INCR_M_JSON;
		1779	goto incr_m_json;
		1780	}
		1781	}
		1782	else if (!*p)
		1783	goto interrupt;
		1784
		1785	++p;
		1786	}
		1787
		1788	// skip a single char inside a string (for \\-processing)
		1789	case INCR_M_BS:
		1790	if (!*p)
		1791	goto interrupt;
		1792
		1793	++p;
		1794	self->incr_mode = INCR_M_STR;
		1795	goto incr_m_str;
		1796
		1797	// inside #-style comments
		1798	case INCR_M_C0:
		1799	case INCR_M_C1:
		1800	incr_m_c:
		1801	for (;;)
		1802	{
		1803	if (*p == '\n')
		1804	{
		1805	self->incr_mode = self->incr_mode == INCR_M_C0 ? INCR_M_WS : INCR_M_JSON;
		1806	break;
		1807	}
		1808	else if (!*p)
		1809	goto interrupt;
		1810
		1811	++p;
		1812	}
		1813
		1814	break;
		1815
		1816	// inside a string
		1817	case INCR_M_STR:
		1818	incr_m_str:
		1819	for (;;)
		1820	{
		1821	if (*p == '"')
		1822	{
		1823	++p;
		1824	self->incr_mode = INCR_M_JSON;
		1825
		1826	if (!self->incr_nest)
		1827	goto interrupt;
		1828
		1829	goto incr_m_json;
		1830	}
		1831	else if (*p == '\\')
		1832	{
		1833	++p; // "virtually" consumes character after \
		1834
		1835	if (!*p) // if at end of string we have to switch modes
		1836	{
		1837	self->incr_mode = INCR_M_BS;
		1838	goto interrupt;
		1839	}
		1840	}
		1841	else if (!*p)
		1842	goto interrupt;
		1843
		1844	++p;
		1845	}
		1846
		1847	// after initial ws, outside string
		1848	case INCR_M_JSON:
		1849	incr_m_json:
		1850	for (;;)
		1851	{
		1852	switch (*p++)
		1853	{
		1854	case 0:
		1855	--p;
		1856	goto interrupt;
		1857
		1858	case 0x09:
		1859	case 0x0a:
		1860	case 0x0d:
		1861	case 0x20:
		1862	if (!self->incr_nest)
		1863	{
		1864	--p; // do not eat the whitespace, let the next round do it
		1865	goto interrupt;
		1866	}
		1867	break;
		1868
		1869	case '"':
		1870	self->incr_mode = INCR_M_STR;
		1871	goto incr_m_str;
		1872
		1873	case '[':
		1874	case '{':
		1875	case '(':
		1876	if (++self->incr_nest > self->max_depth)
		1877	croak (ERR_NESTING_EXCEEDED);
		1878	break;
		1879
		1880	case ']':
		1881	case '}':
		1882	if (--self->incr_nest <= 0)
		1883	goto interrupt;
		1884	break;
		1885
		1886	case ')':
		1887	--self->incr_nest;
		1888	break;
		1889
		1890	case '#':
		1891	self->incr_mode = INCR_M_C1;
		1892	goto incr_m_c;
		1893	}
		1894	}
		1895	}
		1896
		1897	modechange:
		1898	;
		1899	}
		1900
		1901	interrupt:
		1902	self->incr_pos = p - SvPVX (self->incr_text);
		1903	//printf ("interrupt<%.*s>\n", self->incr_pos, SvPVX(self->incr_text));//D
		1904	//printf ("return pos %d mode %d nest %d\n", self->incr_pos, self->incr_mode, self->incr_nest);//D
1461	}	1905	}
1462		1906
1463	/////////////////////////////////////////////////////////////////////////////	1907	/////////////////////////////////////////////////////////////////////////////
1464	// XS interface functions	1908	// XS interface functions
1465		1909
…		…
1474	i >= '0' && i <= '9' ? i - '0'	1918	i >= '0' && i <= '9' ? i - '0'
1475	: i >= 'a' && i <= 'f' ? i - 'a' + 10	1919	: i >= 'a' && i <= 'f' ? i - 'a' + 10
1476	: i >= 'A' && i <= 'F' ? i - 'A' + 10	1920	: i >= 'A' && i <= 'F' ? i - 'A' + 10
1477	: -1;	1921	: -1;
1478		1922
1479	json_stash = gv_stashpv ("JSON::XS" , 1);	1923	json_stash = gv_stashpv ("JSON::XS" , 1);
1480	json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);	1924	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1481		1925
1482	json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true );	1926	types_true = get_bool ("Types::Serialiser::true");
1483	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);	1927	types_false = get_bool ("Types::Serialiser::false");
		1928
		1929	sv_json = newSVpv ("JSON", 0);
		1930	SvREADONLY_on (sv_json);
		1931
		1932	CvNODEBUG_on (get_cv ("JSON::XS::incr_text", 0)); /* the debugger completely breaks lvalue subs */
1484	}	1933	}
1485		1934
1486	PROTOTYPES: DISABLE	1935	PROTOTYPES: DISABLE
1487		1936
1488	void CLONE (...)	1937	void CLONE (...)
1489	CODE:	1938	CODE:
1490	json_stash = 0;	1939	json_stash = 0;
1491	json_boolean_stash = 0;	1940	types_boolean_stash = 0;
1492		1941
1493	void new (char *klass)	1942	void new (char *klass)
1494	PPCODE:	1943	PPCODE:
1495	{	1944	{
1496	SV *pv = NEWSV (0, sizeof (JSON));	1945	SV *pv = NEWSV (0, sizeof (JSON));
1497	SvPOK_only (pv);	1946	SvPOK_only (pv);
1498	Zero (SvPVX (pv), 1, JSON);	1947	json_init ((JSON *)SvPVX (pv));
1499	((JSON *)SvPVX (pv))->flags = F_DEFAULT;
1500	XPUSHs (sv_2mortal (sv_bless (	1948	XPUSHs (sv_2mortal (sv_bless (
1501	newRV_noinc (pv),	1949	newRV_noinc (pv),
1502	strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)	1950	strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)
1503	)));	1951	)));
1504	}	1952	}
…		…
1516	allow_nonref = F_ALLOW_NONREF	1964	allow_nonref = F_ALLOW_NONREF
1517	shrink = F_SHRINK	1965	shrink = F_SHRINK
1518	allow_blessed = F_ALLOW_BLESSED	1966	allow_blessed = F_ALLOW_BLESSED
1519	convert_blessed = F_CONV_BLESSED	1967	convert_blessed = F_CONV_BLESSED
1520	relaxed = F_RELAXED	1968	relaxed = F_RELAXED
		1969	allow_unknown = F_ALLOW_UNKNOWN
		1970	allow_tags = F_ALLOW_TAGS
1521	PPCODE:	1971	PPCODE:
1522	{	1972	{
1523	if (enable)	1973	if (enable)
1524	self->flags \|= ix;	1974	self->flags \|= ix;
1525	else	1975	else
…		…
1540	get_allow_nonref = F_ALLOW_NONREF	1990	get_allow_nonref = F_ALLOW_NONREF
1541	get_shrink = F_SHRINK	1991	get_shrink = F_SHRINK
1542	get_allow_blessed = F_ALLOW_BLESSED	1992	get_allow_blessed = F_ALLOW_BLESSED
1543	get_convert_blessed = F_CONV_BLESSED	1993	get_convert_blessed = F_CONV_BLESSED
1544	get_relaxed = F_RELAXED	1994	get_relaxed = F_RELAXED
		1995	get_allow_unknown = F_ALLOW_UNKNOWN
		1996	get_allow_tags = F_ALLOW_TAGS
1545	PPCODE:	1997	PPCODE:
1546	XPUSHs (boolSV (self->flags & ix));	1998	XPUSHs (boolSV (self->flags & ix));
1547		1999
1548	void max_depth (JSON *self, UV max_depth = 0x80000000UL)	2000	void max_depth (JSON *self, U32 max_depth = 0x80000000UL)
1549	PPCODE:	2001	PPCODE:
1550	{	2002	self->max_depth = max_depth;
1551	UV log2 = 0;
1552
1553	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;
1554
1555	while ((1UL << log2) < max_depth)
1556	++log2;
1557
1558	self->flags = self->flags & ~F_MAXDEPTH \| (log2 << S_MAXDEPTH);
1559
1560	XPUSHs (ST (0));	2003	XPUSHs (ST (0));
1561	}
1562		2004
1563	U32 get_max_depth (JSON *self)	2005	U32 get_max_depth (JSON *self)
1564	CODE:	2006	CODE:
1565	RETVAL = DEC_DEPTH (self->flags);	2007	RETVAL = self->max_depth;
1566	OUTPUT:	2008	OUTPUT:
1567	RETVAL	2009	RETVAL
1568		2010
1569	void max_size (JSON *self, UV max_size = 0)	2011	void max_size (JSON *self, U32 max_size = 0)
1570	PPCODE:	2012	PPCODE:
1571	{	2013	self->max_size = max_size;
1572	UV log2 = 0;
1573
1574	if (max_size > 0x80000000UL) max_size = 0x80000000UL;
1575	if (max_size == 1) max_size = 2;
1576
1577	while ((1UL << log2) < max_size)
1578	++log2;
1579
1580	self->flags = self->flags & ~F_MAXSIZE \| (log2 << S_MAXSIZE);
1581
1582	XPUSHs (ST (0));	2014	XPUSHs (ST (0));
1583	}
1584		2015
1585	int get_max_size (JSON *self)	2016	int get_max_size (JSON *self)
1586	CODE:	2017	CODE:
1587	RETVAL = DEC_SIZE (self->flags);	2018	RETVAL = self->max_size;
1588	OUTPUT:	2019	OUTPUT:
1589	RETVAL	2020	RETVAL
1590		2021
1591	void filter_json_object (JSON self, SV cb = &PL_sv_undef)	2022	void filter_json_object (JSON self, SV cb = &PL_sv_undef)
1592	PPCODE:	2023	PPCODE:
…		…
1598	}	2029	}
1599		2030
1600	void filter_json_single_key_object (JSON self, SV key, SV *cb = &PL_sv_undef)	2031	void filter_json_single_key_object (JSON self, SV key, SV *cb = &PL_sv_undef)
1601	PPCODE:	2032	PPCODE:
1602	{	2033	{
1603	if (!self->cb_sk_object)	2034	if (!self->cb_sk_object)
1604	self->cb_sk_object = newHV ();	2035	self->cb_sk_object = newHV ();
1605		2036
1606	if (SvOK (cb))	2037	if (SvOK (cb))
1607	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);	2038	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1608	else	2039	else
…		…
1619	XPUSHs (ST (0));	2050	XPUSHs (ST (0));
1620	}	2051	}
1621		2052
1622	void encode (JSON self, SV scalar)	2053	void encode (JSON self, SV scalar)
1623	PPCODE:	2054	PPCODE:
1624	XPUSHs (encode_json (scalar, self));	2055	PUTBACK; scalar = encode_json (scalar, self); SPAGAIN;
		2056	XPUSHs (scalar);
1625		2057
1626	void decode (JSON self, SV jsonstr)	2058	void decode (JSON self, SV jsonstr)
1627	PPCODE:	2059	PPCODE:
1628	XPUSHs (decode_json (jsonstr, self, 0));	2060	PUTBACK; jsonstr = decode_json (jsonstr, self, 0); SPAGAIN;
		2061	XPUSHs (jsonstr);
1629		2062
1630	void decode_prefix (JSON self, SV jsonstr)	2063	void decode_prefix (JSON self, SV jsonstr)
1631	PPCODE:	2064	PPCODE:
1632	{	2065	{
1633	UV offset;	2066	SV *sv;
		2067	char *offset;
		2068	PUTBACK; sv = decode_json (jsonstr, self, &offset); SPAGAIN;
1634	EXTEND (SP, 2);	2069	EXTEND (SP, 2);
1635	PUSHs (decode_json (jsonstr, self, &offset));	2070	PUSHs (sv);
1636	PUSHs (sv_2mortal (newSVuv (offset)));	2071	PUSHs (sv_2mortal (newSVuv (ptr_to_index (jsonstr, offset))));
		2072	}
		2073
		2074	void incr_parse (JSON self, SV jsonstr = 0)
		2075	PPCODE:
		2076	{
		2077	if (!self->incr_text)
		2078	self->incr_text = newSVpvn ("", 0);
		2079
		2080	/* if utf8-ness doesn't match the decoder, need to upgrade/downgrade */
		2081	if (!DECODE_WANTS_OCTETS (self) == !SvUTF8 (self->incr_text))
		2082	if (DECODE_WANTS_OCTETS (self))
		2083	{
		2084	if (self->incr_pos)
		2085	self->incr_pos = utf8_length ((U8 *)SvPVX (self->incr_text),
		2086	(U8 *)SvPVX (self->incr_text) + self->incr_pos);
		2087
		2088	sv_utf8_downgrade (self->incr_text, 0);
		2089	}
		2090	else
		2091	{
		2092	sv_utf8_upgrade (self->incr_text);
		2093
		2094	if (self->incr_pos)
		2095	self->incr_pos = utf8_hop ((U8 *)SvPVX (self->incr_text), self->incr_pos)
		2096	- (U8 *)SvPVX (self->incr_text);
		2097	}
		2098
		2099	// append data, if any
		2100	if (jsonstr)
		2101	{
		2102	/* make sure both strings have same encoding */
		2103	if (SvUTF8 (jsonstr) != SvUTF8 (self->incr_text))
		2104	if (SvUTF8 (jsonstr))
		2105	sv_utf8_downgrade (jsonstr, 0);
		2106	else
		2107	sv_utf8_upgrade (jsonstr);
		2108
		2109	/* and then just blindly append */
		2110	{
		2111	STRLEN len;
		2112	const char *str = SvPV (jsonstr, len);
		2113	STRLEN cur = SvCUR (self->incr_text);
		2114
		2115	if (SvLEN (self->incr_text) <= cur + len)
		2116	SvGROW (self->incr_text, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
		2117
		2118	Move (str, SvEND (self->incr_text), len, char);
		2119	SvCUR_set (self->incr_text, SvCUR (self->incr_text) + len);
		2120	*SvEND (self->incr_text) = 0; // this should basically be a nop, too, but make sure it's there
		2121	}
		2122	}
		2123
		2124	if (GIMME_V != G_VOID)
		2125	do
		2126	{
		2127	SV *sv;
		2128	char *offset;
		2129
		2130	if (!INCR_DONE (self))
		2131	{
		2132	incr_parse (self);
		2133
		2134	if (self->incr_pos > self->max_size && self->max_size)
		2135	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		2136	(unsigned long)self->incr_pos, (unsigned long)self->max_size);
		2137
		2138	if (!INCR_DONE (self))
		2139	{
		2140	// as an optimisation, do not accumulate white space in the incr buffer
		2141	if (self->incr_mode == INCR_M_WS && self->incr_pos)
		2142	{
		2143	self->incr_pos = 0;
		2144	SvCUR_set (self->incr_text, 0);
		2145	}
		2146
		2147	break;
		2148	}
		2149	}
		2150
		2151	PUTBACK; sv = decode_json (self->incr_text, self, &offset); SPAGAIN;
		2152	XPUSHs (sv);
		2153
		2154	self->incr_pos -= offset - SvPVX (self->incr_text);
		2155	self->incr_nest = 0;
		2156	self->incr_mode = 0;
		2157
		2158	sv_chop (self->incr_text, offset);
		2159	}
		2160	while (GIMME_V == G_ARRAY);
		2161	}
		2162
		2163	SV incr_text (JSON self)
		2164	ATTRS: lvalue
		2165	CODE:
		2166	{
		2167	if (self->incr_pos)
		2168	croak ("incr_text can not be called when the incremental parser already started parsing");
		2169
		2170	RETVAL = self->incr_text ? SvREFCNT_inc (self->incr_text) : &PL_sv_undef;
		2171	}
		2172	OUTPUT:
		2173	RETVAL
		2174
		2175	void incr_skip (JSON *self)
		2176	CODE:
		2177	{
		2178	if (self->incr_pos)
		2179	{
		2180	sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + self->incr_pos);
		2181	self->incr_pos = 0;
		2182	self->incr_nest = 0;
		2183	self->incr_mode = 0;
		2184	}
		2185	}
		2186
		2187	void incr_reset (JSON *self)
		2188	CODE:
		2189	{
		2190	SvREFCNT_dec (self->incr_text);
		2191	self->incr_text = 0;
		2192	self->incr_pos = 0;
		2193	self->incr_nest = 0;
		2194	self->incr_mode = 0;
1637	}	2195	}
1638		2196
1639	void DESTROY (JSON *self)	2197	void DESTROY (JSON *self)
1640	CODE:	2198	CODE:
1641	SvREFCNT_dec (self->cb_sk_object);	2199	SvREFCNT_dec (self->cb_sk_object);
1642	SvREFCNT_dec (self->cb_object);	2200	SvREFCNT_dec (self->cb_object);
		2201	SvREFCNT_dec (self->incr_text);
1643		2202
1644	PROTOTYPES: ENABLE	2203	PROTOTYPES: ENABLE
1645		2204
1646	void encode_json (SV *scalar)	2205	void encode_json (SV *scalar)
1647	PPCODE:	2206	PPCODE:
1648	{	2207	{
1649	JSON json = { F_DEFAULT \| F_UTF8 };	2208	JSON json;
1650	XPUSHs (encode_json (scalar, &json));	2209	json_init (&json);
		2210	json.flags \|= F_UTF8;
		2211	PUTBACK; scalar = encode_json (scalar, &json); SPAGAIN;
		2212	XPUSHs (scalar);
1651	}	2213	}
1652		2214
1653	void decode_json (SV *jsonstr)	2215	void decode_json (SV *jsonstr)
1654	PPCODE:	2216	PPCODE:
1655	{	2217	{
1656	JSON json = { F_DEFAULT \| F_UTF8 };	2218	JSON json;
1657	XPUSHs (decode_json (jsonstr, &json, 0));	2219	json_init (&json);
		2220	json.flags \|= F_UTF8;
		2221	PUTBACK; jsonstr = decode_json (jsonstr, &json, 0); SPAGAIN;
		2222	XPUSHs (jsonstr);
1658	}	2223	}
1659		2224

Diff Legend

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

Comparing JSON-XS/XS.xs (file contents): Revision 1.75 by root, Wed Mar 19 15:37:54 2008 UTC vs. Revision 1.119 by root, Mon Oct 28 23:19:54 2013 UTC

Diff Legend

Comparing JSON-XS/XS.xs (file contents):
Revision 1.75 by root, Wed Mar 19 15:37:54 2008 UTC vs.
Revision 1.119 by root, Mon Oct 28 23:19:54 2013 UTC