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

Comparing JSON-XS/XS.xs (file contents):
Revision 1.73 by root, Wed Mar 19 13:44:43 2008 UTC vs.
Revision 1.125 by root, Sun Feb 21 15:37:53 2016 UTC

…		…
4		4
5	#include <assert.h>	5	#include <assert.h>
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 <float.h>	10	#include <float.h>
10		11
11	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)	12	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)
12	# define snprintf _snprintf // C compilers have this in stdio.h	13	# define snprintf _snprintf // C compilers have this in stdio.h
13	#endif	14	#endif
14		15
15	// 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
16	// guarentees, though. if it breaks, you get to keep the pieces.	17	// guarantees, though. if it breaks, you get to keep the pieces.
17	#ifndef UTF8_MAXBYTES	18	#ifndef UTF8_MAXBYTES
18	# define UTF8_MAXBYTES 13	19	# define UTF8_MAXBYTES 13
19	#endif	20	#endif
		21
		22	// compatibility with perl <5.18
		23	#ifndef HvNAMELEN_get
		24	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		25	#endif
		26	#ifndef HvNAMELEN
		27	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		28	#endif
		29	#ifndef HvNAMEUTF8
		30	# define HvNAMEUTF8(hv) 0
		31	#endif
		32
		33	// three extra for rounding, sign, and end of string
		34	#define IVUV_MAXCHARS (sizeof (UV) * CHAR_BIT * 28 / 93 + 3)
20		35
21	#define F_ASCII 0x00000001UL	36	#define F_ASCII 0x00000001UL
22	#define F_LATIN1 0x00000002UL	37	#define F_LATIN1 0x00000002UL
23	#define F_UTF8 0x00000004UL	38	#define F_UTF8 0x00000004UL
24	#define F_INDENT 0x00000008UL	39	#define F_INDENT 0x00000008UL
…		…
28	#define F_ALLOW_NONREF 0x00000100UL	43	#define F_ALLOW_NONREF 0x00000100UL
29	#define F_SHRINK 0x00000200UL	44	#define F_SHRINK 0x00000200UL
30	#define F_ALLOW_BLESSED 0x00000400UL	45	#define F_ALLOW_BLESSED 0x00000400UL
31	#define F_CONV_BLESSED 0x00000800UL	46	#define F_CONV_BLESSED 0x00000800UL
32	#define F_RELAXED 0x00001000UL	47	#define F_RELAXED 0x00001000UL
33		48	#define F_ALLOW_UNKNOWN 0x00002000UL
34	#define F_MAXDEPTH 0xf8000000UL	49	#define F_ALLOW_TAGS 0x00004000UL
35	#define S_MAXDEPTH 27
36	#define F_MAXSIZE 0x01f00000UL
37	#define S_MAXSIZE 20
38	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing	50	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
39		51
40	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
41	#define DEC_SIZE(flags) (1UL << ((flags & F_MAXSIZE ) >> S_MAXSIZE ))
42
43	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER	52	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER
44	#define F_DEFAULT (9UL << S_MAXDEPTH)
45		53
46	#define INIT_SIZE 32 // initial scalar size to be allocated	54	#define INIT_SIZE 32 // initial scalar size to be allocated
47	#define INDENT_STEP 3 // spaces per indentation level	55	#define INDENT_STEP 3 // spaces per indentation level
48		56
49	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size	57	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size
		58
		59	#define DECODE_WANTS_OCTETS(json) ((json)->flags & F_UTF8)
50		60
51	#define SB do {	61	#define SB do {
52	#define SE } while (0)	62	#define SE } while (0)
53		63
54	#if __GNUC__ >= 3	64	#if __GNUC__ >= 3
…		…
64		74
65	#define IN_RANGE_INC(type,val,beg,end) \	75	#define IN_RANGE_INC(type,val,beg,end) \
66	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \	76	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
67	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))	77	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
68		78
		79	#define ERR_NESTING_EXCEEDED "json text or perl structure exceeds maximum nesting level (max_depth set too low?)"
		80
69	#ifdef USE_ITHREADS	81	#ifdef USE_ITHREADS
70	# define JSON_SLOW 1	82	# define JSON_SLOW 1
71	# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1))	83	# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1))
72	#else	84	#else
73	# define JSON_SLOW 0	85	# define JSON_SLOW 0
74	# define JSON_STASH json_stash	86	# define JSON_STASH json_stash
75	#endif	87	#endif
76		88
		89	// the amount of HEs to allocate on the stack, when sorting keys
		90	#define STACK_HES 64
		91
77	static HV json_stash, json_boolean_stash; // JSON::XS::	92	static HV json_stash, types_boolean_stash; // JSON::XS::
78	static SV json_true, json_false;	93	static SV types_true, types_false, *sv_json;
		94
		95	enum {
		96	INCR_M_WS = 0, // initial whitespace skipping, must be 0
		97	INCR_M_STR, // inside string
		98	INCR_M_BS, // inside backslash
		99	INCR_M_C0, // inside comment in initial whitespace sequence
		100	INCR_M_C1, // inside comment in other places
		101	INCR_M_JSON // outside anything, count nesting
		102	};
		103
		104	#define INCR_DONE(json) ((json)->incr_nest <= 0 && (json)->incr_mode == INCR_M_JSON)
79		105
80	typedef struct {	106	typedef struct {
81	U32 flags;	107	U32 flags;
		108	U32 max_depth;
		109	STRLEN max_size;
		110
82	SV *cb_object;	111	SV *cb_object;
83	HV *cb_sk_object;	112	HV *cb_sk_object;
		113
		114	// for the incremental parser
		115	SV *incr_text; // the source text so far
		116	STRLEN incr_pos; // the current offset into the text
		117	int incr_nest; // {[]}-nesting level
		118	unsigned char incr_mode;
84	} JSON;	119	} JSON;
		120
		121	INLINE void
		122	json_init (JSON *json)
		123	{
		124	Zero (json, 1, JSON);
		125	json->max_depth = 512;
		126	}
85		127
86	/////////////////////////////////////////////////////////////////////////////	128	/////////////////////////////////////////////////////////////////////////////
87	// utility functions	129	// utility functions
88		130
		131	INLINE SV *
		132	get_bool (const char *name)
		133	{
		134	SV *sv = get_sv (name, 1);
		135
		136	SvREADONLY_on (sv);
		137	SvREADONLY_on (SvRV (sv));
		138
		139	return sv;
		140	}
		141
89	INLINE void	142	INLINE void
90	shrink (SV *sv)	143	shrink (SV *sv)
91	{	144	{
92	sv_utf8_downgrade (sv, 1);	145	sv_utf8_downgrade (sv, 1);
		146
93	if (SvLEN (sv) > SvCUR (sv) + 1)	147	if (SvLEN (sv) > SvCUR (sv) + 1)
94	{	148	{
95	#ifdef SvPV_shrink_to_cur	149	#ifdef SvPV_shrink_to_cur
96	SvPV_shrink_to_cur (sv);	150	SvPV_shrink_to_cur (sv);
97	#elif defined (SvPV_renew)	151	#elif defined (SvPV_renew)
…		…
123	// this function takes advantage of this fact, although current gccs	177	// this function takes advantage of this fact, although current gccs
124	// seem to optimise the check for >= 0x80 away anyways	178	// seem to optimise the check for >= 0x80 away anyways
125	INLINE unsigned char *	179	INLINE unsigned char *
126	encode_utf8 (unsigned char *s, UV ch)	180	encode_utf8 (unsigned char *s, UV ch)
127	{	181	{
128	if (ch <= 0x7FF)	182	if (expect_false (ch < 0x000080))
129	{	183	*s++ = ch;
130	*s++ = (ch >> 6) \| 0xc0;	184	else if (expect_true (ch < 0x000800))
131	*s++ = (ch & 0x3f) \| 0x80;	185	*s++ = 0xc0 \| ( ch >> 6),
132	}	186	*s++ = 0x80 \| ( ch & 0x3f);
133	else	187	else if ( ch < 0x010000)
134	s = uvuni_to_utf8_flags (s, ch, 0);	188	*s++ = 0xe0 \| ( ch >> 12),
		189	*s++ = 0x80 \| ((ch >> 6) & 0x3f),
		190	*s++ = 0x80 \| ( ch & 0x3f);
		191	else if ( ch < 0x110000)
		192	*s++ = 0xf0 \| ( ch >> 18),
		193	*s++ = 0x80 \| ((ch >> 12) & 0x3f),
		194	*s++ = 0x80 \| ((ch >> 6) & 0x3f),
		195	*s++ = 0x80 \| ( ch & 0x3f);
135		196
136	return s;	197	return s;
137	}	198	}
138		199
		200	// convert offset pointer to character index, sv must be string
		201	static STRLEN
		202	ptr_to_index (SV sv, char offset)
		203	{
		204	return SvUTF8 (sv)
		205	? utf8_distance (offset, SvPVX (sv))
		206	: offset - SvPVX (sv);
		207	}
		208
		209	/////////////////////////////////////////////////////////////////////////////
		210	// fp hell
		211
		212	// scan a group of digits, and a trailing exponent
		213	static void
		214	json_atof_scan1 (const char s, NV accum, int *expo, int postdp, int maxdepth)
		215	{
		216	UV uaccum = 0;
		217	int eaccum = 0;
		218
		219	// if we recurse too deep, skip all remaining digits
		220	// to avoid a stack overflow attack
		221	if (expect_false (--maxdepth <= 0))
		222	while (((U8)*s - '0') < 10)
		223	++s;
		224
		225	for (;;)
		226	{
		227	U8 dig = (U8)*s - '0';
		228
		229	if (expect_false (dig >= 10))
		230	{
		231	if (dig == (U8)((U8)'.' - (U8)'0'))
		232	{
		233	++s;
		234	json_atof_scan1 (s, accum, expo, 1, maxdepth);
		235	}
		236	else if ((dig \| ' ') == 'e' - '0')
		237	{
		238	int exp2 = 0;
		239	int neg = 0;
		240
		241	++s;
		242
		243	if (*s == '-')
		244	{
		245	++s;
		246	neg = 1;
		247	}
		248	else if (*s == '+')
		249	++s;
		250
		251	while ((dig = (U8)*s - '0') < 10)
		252	exp2 = exp2 * 10 + *s++ - '0';
		253
		254	*expo += neg ? -exp2 : exp2;
		255	}
		256
		257	break;
		258	}
		259
		260	++s;
		261
		262	uaccum = uaccum * 10 + dig;
		263	++eaccum;
		264
		265	// if we have too many digits, then recurse for more
		266	// we actually do this for rather few digits
		267	if (uaccum >= (UV_MAX - 9) / 10)
		268	{
		269	if (postdp) *expo -= eaccum;
		270	json_atof_scan1 (s, accum, expo, postdp, maxdepth);
		271	if (postdp) *expo += eaccum;
		272
		273	break;
		274	}
		275	}
		276
		277	// this relies greatly on the quality of the pow ()
		278	// implementation of the platform, but a good
		279	// implementation is hard to beat.
		280	// (IEEE 754 conformant ones are required to be exact)
		281	if (postdp) *expo -= eaccum;
		282	accum += uaccum Perl_pow (10., *expo);
		283	*expo += eaccum;
		284	}
		285
		286	static NV
		287	json_atof (const char *s)
		288	{
		289	NV accum = 0.;
		290	int expo = 0;
		291	int neg = 0;
		292
		293	if (*s == '-')
		294	{
		295	++s;
		296	neg = 1;
		297	}
		298
		299	// a recursion depth of ten gives us >>500 bits
		300	json_atof_scan1 (s, &accum, &expo, 0, 10);
		301
		302	return neg ? -accum : accum;
		303	}
139	/////////////////////////////////////////////////////////////////////////////	304	/////////////////////////////////////////////////////////////////////////////
140	// encoder	305	// encoder
141		306
142	// structure used for encoding JSON	307	// structure used for encoding JSON
143	typedef struct	308	typedef struct
…		…
145	char *cur; // SvPVX (sv) + current output position	310	char *cur; // SvPVX (sv) + current output position
146	char *end; // SvEND (sv)	311	char *end; // SvEND (sv)
147	SV *sv; // result scalar	312	SV *sv; // result scalar
148	JSON json;	313	JSON json;
149	U32 indent; // indentation level	314	U32 indent; // indentation level
150	U32 maxdepth; // max. indentation/recursion level
151	UV limit; // escape character values >= this value when encoding	315	UV limit; // escape character values >= this value when encoding
152	} enc_t;	316	} enc_t;
153		317
154	INLINE void	318	INLINE void
155	need (enc_t *enc, STRLEN len)	319	need (enc_t *enc, STRLEN len)
156	{	320	{
157	if (expect_false (enc->cur + len >= enc->end))	321	if (expect_false (enc->cur + len >= enc->end))
158	{	322	{
159	STRLEN cur = enc->cur - SvPVX (enc->sv);	323	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
160	SvGROW (enc->sv, cur + len + 1);	324	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
161	enc->cur = SvPVX (enc->sv) + cur;	325	enc->cur = SvPVX (enc->sv) + cur;
162	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	326	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
163	}	327	}
164	}	328	}
165		329
…		…
227	clen = 1;	391	clen = 1;
228	}	392	}
229		393
230	if (uch < 0x80/0x20/ \|\| uch >= enc->limit)	394	if (uch < 0x80/0x20/ \|\| uch >= enc->limit)
231	{	395	{
232	if (uch > 0xFFFFUL)	396	if (uch >= 0x10000UL)
233	{	397	{
234	if (uch > 0x10FFFFUL)	398	if (uch >= 0x110000UL)
235	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);	399	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
236		400
237	need (enc, len += 11);	401	need (enc, len += 11);
238	sprintf (enc->cur, "\\u%04x\\u%04x",	402	sprintf (enc->cur, "\\u%04x\\u%04x",
239	(int)((uch - 0x10000) / 0x400 + 0xD800),	403	(int)((uch - 0x10000) / 0x400 + 0xD800),
240	(int)((uch - 0x10000) % 0x400 + 0xDC00));	404	(int)((uch - 0x10000) % 0x400 + 0xDC00));
241	enc->cur += 12;	405	enc->cur += 12;
242	}	406	}
243	else	407	else
244	{	408	{
245	static char hexdigit [16] = "0123456789abcdef";
246	need (enc, len += 5);	409	need (enc, len += 5);
247	*enc->cur++ = '\\';	410	*enc->cur++ = '\\';
248	*enc->cur++ = 'u';	411	*enc->cur++ = 'u';
249	*enc->cur++ = hexdigit [ uch >> 12 ];	412	*enc->cur++ = PL_hexdigit [ uch >> 12 ];
250	*enc->cur++ = hexdigit [(uch >> 8) & 15];	413	*enc->cur++ = PL_hexdigit [(uch >> 8) & 15];
251	*enc->cur++ = hexdigit [(uch >> 4) & 15];	414	*enc->cur++ = PL_hexdigit [(uch >> 4) & 15];
252	*enc->cur++ = hexdigit [(uch >> 0) & 15];	415	*enc->cur++ = PL_hexdigit [(uch >> 0) & 15];
253	}	416	}
254		417
255	str += clen;	418	str += clen;
256	}	419	}
257	else if (enc->json.flags & F_LATIN1)	420	else if (enc->json.flags & F_LATIN1)
…		…
328	static void	491	static void
329	encode_av (enc_t enc, AV av)	492	encode_av (enc_t enc, AV av)
330	{	493	{
331	int i, len = av_len (av);	494	int i, len = av_len (av);
332		495
333	if (enc->indent >= enc->maxdepth)	496	if (enc->indent >= enc->json.max_depth)
334	croak ("data structure too deep (hit recursion limit)");	497	croak (ERR_NESTING_EXCEEDED);
335		498
336	encode_ch (enc, '[');	499	encode_ch (enc, '[');
337		500
338	if (len >= 0)	501	if (len >= 0)
339	{	502	{
340	encode_nl (enc); ++enc->indent;	503	encode_nl (enc); ++enc->indent;
341		504
342	for (i = 0; i <= len; ++i)	505	for (i = 0; i <= len; ++i)
…		…
354	encode_comma (enc);	517	encode_comma (enc);
355	}	518	}
356		519
357	encode_nl (enc); --enc->indent; encode_indent (enc);	520	encode_nl (enc); --enc->indent; encode_indent (enc);
358	}	521	}
359		522
360	encode_ch (enc, ']');	523	encode_ch (enc, ']');
361	}	524	}
362		525
363	static void	526	static void
364	encode_hk (enc_t enc, HE he)	527	encode_hk (enc_t enc, HE he)
…		…
368	if (HeKLEN (he) == HEf_SVKEY)	531	if (HeKLEN (he) == HEf_SVKEY)
369	{	532	{
370	SV *sv = HeSVKEY (he);	533	SV *sv = HeSVKEY (he);
371	STRLEN len;	534	STRLEN len;
372	char *str;	535	char *str;
373		536
374	SvGETMAGIC (sv);	537	SvGETMAGIC (sv);
375	str = SvPV (sv, len);	538	str = SvPV (sv, len);
376		539
377	encode_str (enc, str, len, SvUTF8 (sv));	540	encode_str (enc, str, len, SvUTF8 (sv));
378	}	541	}
…		…
413		576
414	static void	577	static void
415	encode_hv (enc_t enc, HV hv)	578	encode_hv (enc_t enc, HV hv)
416	{	579	{
417	HE *he;	580	HE *he;
418	int count;
419		581
420	if (enc->indent >= enc->maxdepth)	582	if (enc->indent >= enc->json.max_depth)
421	croak ("data structure too deep (hit recursion limit)");	583	croak (ERR_NESTING_EXCEEDED);
422		584
423	encode_ch (enc, '{');	585	encode_ch (enc, '{');
424		586
425	// for canonical output we have to sort by keys first	587	// for canonical output we have to sort by keys first
426	// actually, this is mostly due to the stupid so-called	588	// actually, this is mostly due to the stupid so-called
427	// security workaround added somewhere in 5.8.x.	589	// security workaround added somewhere in 5.8.x
428	// that randomises hash orderings	590	// that randomises hash orderings
429	if (enc->json.flags & F_CANONICAL)	591	if (enc->json.flags & F_CANONICAL && !SvRMAGICAL (hv))
430	{	592	{
431	int count = hv_iterinit (hv);	593	int count = hv_iterinit (hv);
432		594
433	if (SvMAGICAL (hv))	595	if (SvMAGICAL (hv))
434	{	596	{
…		…
445	}	607	}
446		608
447	if (count)	609	if (count)
448	{	610	{
449	int i, fast = 1;	611	int i, fast = 1;
450	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)	612	HE *hes_stack [STACK_HES];
451	HE *hes = _alloca (count sizeof (HE));	613	HE **hes = hes_stack;
452	#else	614
453	HE *hes [count]; // if your compiler dies here, you need to enable C99 mode	615	// allocate larger arrays on the heap
454	#endif	616	if (count > STACK_HES)
		617	{
		618	SV sv = sv_2mortal (NEWSV (0, count sizeof (*hes)));
		619	hes = (HE **)SvPVX (sv);
		620	}
455		621
456	i = 0;	622	i = 0;
457	while ((he = hv_iternext (hv)))	623	while ((he = hv_iternext (hv)))
458	{	624	{
459	hes [i++] = he;	625	hes [i++] = he;
…		…
528	// encode objects, arrays and special \0=false and \1=true values.	694	// encode objects, arrays and special \0=false and \1=true values.
529	static void	695	static void
530	encode_rv (enc_t enc, SV sv)	696	encode_rv (enc_t enc, SV sv)
531	{	697	{
532	svtype svt;	698	svtype svt;
		699	GV *method;
533		700
534	SvGETMAGIC (sv);	701	SvGETMAGIC (sv);
535	svt = SvTYPE (sv);	702	svt = SvTYPE (sv);
536		703
537	if (expect_false (SvOBJECT (sv)))	704	if (expect_false (SvOBJECT (sv)))
538	{	705	{
539	HV *stash = !JSON_SLOW \|\| json_boolean_stash	706	HV *boolean_stash = !JSON_SLOW \|\| types_boolean_stash
540	? json_boolean_stash	707	? types_boolean_stash
541	: gv_stashpv ("JSON::XS::Boolean", 1);	708	: gv_stashpv ("Types::Serialiser::Boolean", 1);
		709	HV *stash = SvSTASH (sv);
542		710
543	if (SvSTASH (sv) == stash)	711	if (stash == boolean_stash)
544	{	712	{
545	if (SvIV (sv))	713	if (SvIV (sv))
546	encode_str (enc, "true", 4, 0);	714	encode_str (enc, "true", 4, 0);
547	else	715	else
548	encode_str (enc, "false", 5, 0);	716	encode_str (enc, "false", 5, 0);
549	}	717	}
		718	else if ((enc->json.flags & F_ALLOW_TAGS) && (method = gv_fetchmethod_autoload (stash, "FREEZE", 0)))
		719	{
		720	int count;
		721	dSP;
		722
		723	ENTER; SAVETMPS;
		724	SAVESTACK_POS ();
		725	PUSHMARK (SP);
		726	EXTEND (SP, 2);
		727	// we re-bless the reference to get overload and other niceties right
		728	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		729	PUSHs (sv_json);
		730
		731	PUTBACK;
		732	count = call_sv ((SV *)GvCV (method), G_ARRAY);
		733	SPAGAIN;
		734
		735	// catch this surprisingly common error
		736	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		737	croak ("%s::FREEZE method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		738
		739	encode_ch (enc, '(');
		740	encode_ch (enc, '"');
		741	encode_str (enc, HvNAME (stash), HvNAMELEN (stash), HvNAMEUTF8 (stash));
		742	encode_ch (enc, '"');
		743	encode_ch (enc, ')');
		744	encode_ch (enc, '[');
		745
		746	while (count)
		747	{
		748	encode_sv (enc, SP[1 - count--]);
		749
		750	if (count)
		751	encode_ch (enc, ',');
		752	}
		753
		754	encode_ch (enc, ']');
		755
		756	FREETMPS; LEAVE;
		757	}
		758	else if ((enc->json.flags & F_CONV_BLESSED) && (method = gv_fetchmethod_autoload (stash, "TO_JSON", 0)))
		759	{
		760	dSP;
		761
		762	ENTER; SAVETMPS;
		763	PUSHMARK (SP);
		764	// we re-bless the reference to get overload and other niceties right
		765	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		766
		767	// calling with G_SCALAR ensures that we always get a 1 return value
		768	PUTBACK;
		769	call_sv ((SV *)GvCV (method), G_SCALAR);
		770	SPAGAIN;
		771
		772	// catch this surprisingly common error
		773	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		774	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		775
		776	sv = POPs;
		777	PUTBACK;
		778
		779	encode_sv (enc, sv);
		780
		781	FREETMPS; LEAVE;
		782	}
		783	else if (enc->json.flags & F_ALLOW_BLESSED)
		784	encode_str (enc, "null", 4, 0);
550	else	785	else
551	{
552	#if 0
553	if (0 && sv_derived_from (rv, "JSON::Literal"))
554	{
555	// not yet
556	}
557	#endif
558	if (enc->json.flags & F_CONV_BLESSED)
559	{
560	// we re-bless the reference to get overload and other niceties right
561	GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 0);
562
563	if (to_json)
564	{
565	dSP;
566
567	ENTER; SAVETMPS; PUSHMARK (SP);
568	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
569
570	// calling with G_SCALAR ensures that we always get a 1 return value
571	PUTBACK;
572	call_sv ((SV *)GvCV (to_json), G_SCALAR);
573	SPAGAIN;
574
575	// catch this surprisingly common error
576	if (SvROK (TOPs) && SvRV (TOPs) == sv)
577	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
578
579	sv = POPs;
580	PUTBACK;
581
582	encode_sv (enc, sv);
583
584	FREETMPS; LEAVE;
585	}
586	else if (enc->json.flags & F_ALLOW_BLESSED)
587	encode_str (enc, "null", 4, 0);
588	else
589	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
590	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
591	}
592	else if (enc->json.flags & F_ALLOW_BLESSED)
593	encode_str (enc, "null", 4, 0);
594	else
595	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	786	croak ("encountered object '%s', but neither allow_blessed, convert_blessed nor allow_tags settings are enabled (or TO_JSON/FREEZE method missing)",
596	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	787	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
597	}
598	}	788	}
599	else if (svt == SVt_PVHV)	789	else if (svt == SVt_PVHV)
600	encode_hv (enc, (HV *)sv);	790	encode_hv (enc, (HV *)sv);
601	else if (svt == SVt_PVAV)	791	else if (svt == SVt_PVAV)
602	encode_av (enc, (AV *)sv);	792	encode_av (enc, (AV *)sv);
…		…
607		797
608	if (len == 1 && *pv == '1')	798	if (len == 1 && *pv == '1')
609	encode_str (enc, "true", 4, 0);	799	encode_str (enc, "true", 4, 0);
610	else if (len == 1 && *pv == '0')	800	else if (len == 1 && *pv == '0')
611	encode_str (enc, "false", 5, 0);	801	encode_str (enc, "false", 5, 0);
		802	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		803	encode_str (enc, "null", 4, 0);
612	else	804	else
613	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",	805	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
614	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	806	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
615	}	807	}
		808	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		809	encode_str (enc, "null", 4, 0);
616	else	810	else
617	croak ("encountered %s, but JSON can only represent references to arrays or hashes",	811	croak ("encountered %s, but JSON can only represent references to arrays or hashes",
618	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	812	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
619	}	813	}
620		814
…		…
638	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);	832	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
639	enc->cur += strlen (enc->cur);	833	enc->cur += strlen (enc->cur);
640	}	834	}
641	else if (SvIOKp (sv))	835	else if (SvIOKp (sv))
642	{	836	{
643	// we assume we can always read an IV as a UV	837	// we assume we can always read an IV as a UV and vice versa
644	if (SvUV (sv) & ~(UV)0x7fff)	838	// we assume two's complement
645	{	839	// we assume no aliasing issues in the union
646	// large integer, use the (rather slow) snprintf way.	840	if (SvIsUV (sv) ? SvUVX (sv) <= 59000
647	need (enc, sizeof (UV) * 3);	841	: SvIVX (sv) <= 59000 && SvIVX (sv) >= -59000)
648	enc->cur +=
649	SvIsUV(sv)
650	? snprintf (enc->cur, sizeof (UV) * 3, "%"UVuf, (UV)SvUVX (sv))
651	: snprintf (enc->cur, sizeof (UV) * 3, "%"IVdf, (IV)SvIVX (sv));
652	}
653	else
654	{	842	{
655	// optimise the "small number case"	843	// optimise the "small number case"
656	// code will likely be branchless and use only a single multiplication	844	// code will likely be branchless and use only a single multiplication
		845	// works for numbers up to 59074
657	I32 i = SvIV (sv);	846	I32 i = SvIVX (sv);
658	U32 u;	847	U32 u;
659	char digit, nz = 0;	848	char digit, nz = 0;
660		849
661	need (enc, 6);	850	need (enc, 6);
662		851
…		…
668		857
669	// now output digit by digit, each time masking out the integer part	858	// now output digit by digit, each time masking out the integer part
670	// and multiplying by 5 while moving the decimal point one to the right,	859	// and multiplying by 5 while moving the decimal point one to the right,
671	// resulting in a net multiplication by 10.	860	// resulting in a net multiplication by 10.
672	// we always write the digit to memory but conditionally increment	861	// we always write the digit to memory but conditionally increment
673	// the pointer, to ease the usage of conditional move instructions.	862	// the pointer, to enable the use of conditional move instructions.
674	digit = u >> 28; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0xfffffff) 5;	863	digit = u >> 28; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0xfffffffUL) 5;
675	digit = u >> 27; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x7ffffff) 5;	864	digit = u >> 27; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x7ffffffUL) 5;
676	digit = u >> 26; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x3ffffff) 5;	865	digit = u >> 26; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x3ffffffUL) 5;
677	digit = u >> 25; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x1ffffff) 5;	866	digit = u >> 25; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x1ffffffUL) 5;
678	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'	867	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
679	}	868	}
		869	else
		870	{
		871	// large integer, use the (rather slow) snprintf way.
		872	need (enc, IVUV_MAXCHARS);
		873	enc->cur +=
		874	SvIsUV(sv)
		875	? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv))
		876	: snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv));
		877	}
680	}	878	}
681	else if (SvROK (sv))	879	else if (SvROK (sv))
682	encode_rv (enc, SvRV (sv));	880	encode_rv (enc, SvRV (sv));
683	else if (!SvOK (sv))	881	else if (!SvOK (sv) \|\| enc->json.flags & F_ALLOW_UNKNOWN)
684	encode_str (enc, "null", 4, 0);	882	encode_str (enc, "null", 4, 0);
685	else	883	else
686	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",	884	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, check your input data",
687	SvPV_nolen (sv), SvFLAGS (sv));	885	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
		886	}
		887
		888	static int
		889	json_scalar (SV *scalar)
		890	{
		891	return 0;//D
		892	if (!SvROK (scalar))
		893	return 1;
688	}	894	}
689		895
690	static SV *	896	static SV *
691	encode_json (SV scalar, JSON json)	897	encode_json (SV scalar, JSON json)
692	{	898	{
693	enc_t enc;	899	enc_t enc;
694		900
695	if (!(json->flags & F_ALLOW_NONREF) && !SvROK (scalar))	901	if (!(json->flags & F_ALLOW_NONREF) && json_scalar (scalar))
696	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");	902	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
697		903
698	enc.json = *json;	904	enc.json = *json;
699	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	905	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
700	enc.cur = SvPVX (enc.sv);	906	enc.cur = SvPVX (enc.sv);
701	enc.end = SvEND (enc.sv);	907	enc.end = SvEND (enc.sv);
702	enc.indent = 0;	908	enc.indent = 0;
703	enc.maxdepth = DEC_DEPTH (enc.json.flags);
704	enc.limit = enc.json.flags & F_ASCII ? 0x000080UL	909	enc.limit = enc.json.flags & F_ASCII ? 0x000080UL
705	: enc.json.flags & F_LATIN1 ? 0x000100UL	910	: enc.json.flags & F_LATIN1 ? 0x000100UL
706	: 0x10FFFFUL;	911	: 0x110000UL;
707		912
708	SvPOK_only (enc.sv);	913	SvPOK_only (enc.sv);
709	encode_sv (&enc, scalar);	914	encode_sv (&enc, scalar);
		915	encode_nl (&enc);
710		916
711	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	917	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
712	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	918	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
713		919
714	if (!(enc.json.flags & (F_ASCII \| F_LATIN1 \| F_UTF8)))	920	if (!(enc.json.flags & (F_ASCII \| F_LATIN1 \| F_UTF8)))
…		…
775	if (*dec->cur != ch) \	981	if (*dec->cur != ch) \
776	ERR (# ch " expected"); \	982	ERR (# ch " expected"); \
777	++dec->cur; \	983	++dec->cur; \
778	SE	984	SE
779		985
780	#define DEC_INC_DEPTH if (++dec->depth > dec->maxdepth) ERR ("json datastructure exceeds maximum nesting level (set a higher max_depth)")	986	#define DEC_INC_DEPTH if (++dec->depth > dec->json.max_depth) ERR (ERR_NESTING_EXCEEDED)
781	#define DEC_DEC_DEPTH --dec->depth	987	#define DEC_DEC_DEPTH --dec->depth
782		988
783	static SV decode_sv (dec_t dec);	989	static SV decode_sv (dec_t dec);
784		990
785	static signed char decode_hexdigit[256];	991	static signed char decode_hexdigit[256];
…		…
889	default:	1095	default:
890	--dec_cur;	1096	--dec_cur;
891	ERR ("illegal backslash escape sequence in string");	1097	ERR ("illegal backslash escape sequence in string");
892	}	1098	}
893	}	1099	}
894	else if (expect_true (ch >= 0x20 && ch <= 0x7f))	1100	else if (expect_true (ch >= 0x20 && ch < 0x80))
895	*cur++ = ch;	1101	*cur++ = ch;
896	else if (ch >= 0x80)	1102	else if (ch >= 0x80)
897	{	1103	{
898	STRLEN clen;	1104	STRLEN clen;
899	UV uch;
900		1105
901	--dec_cur;	1106	--dec_cur;
902		1107
903	uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen);	1108	decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
904	if (clen == (STRLEN)-1)	1109	if (clen == (STRLEN)-1)
905	ERR ("malformed UTF-8 character in JSON string");	1110	ERR ("malformed UTF-8 character in JSON string");
906		1111
907	do	1112	do
908	cur++ = dec_cur++;	1113	cur++ = dec_cur++;
909	while (--clen);	1114	while (--clen);
910		1115
911	utf8 = 1;	1116	utf8 = 1;
912	}	1117	}
		1118	else if (ch == '\t' && dec->json.flags & F_RELAXED)
		1119	*cur++ = ch;
913	else	1120	else
914	{	1121	{
915	--dec_cur;	1122	--dec_cur;
916		1123
917	if (!ch)	1124	if (!ch)
…		…
925	{	1132	{
926	STRLEN len = cur - buf;	1133	STRLEN len = cur - buf;
927		1134
928	if (sv)	1135	if (sv)
929	{	1136	{
930	SvGROW (sv, SvCUR (sv) + len + 1);	1137	STRLEN cur = SvCUR (sv);
		1138
		1139	if (SvLEN (sv) <= cur + len)
		1140	SvGROW (sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
		1141
931	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);	1142	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);
932	SvCUR_set (sv, SvCUR (sv) + len);	1143	SvCUR_set (sv, SvCUR (sv) + len);
933	}	1144	}
934	else	1145	else
935	sv = newSVpvn (buf, len);	1146	sv = newSVpvn (buf, len);
…		…
1026		1237
1027	// special case the rather common 1..5-digit-int case	1238	// special case the rather common 1..5-digit-int case
1028	if (*start == '-')	1239	if (*start == '-')
1029	switch (len)	1240	switch (len)
1030	{	1241	{
1031	case 2: return newSViv (-( start [1] - '0' * 1));	1242	case 2: return newSViv (-(IV)( start [1] - '0' * 1));
1032	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));	1243	case 3: return newSViv (-(IV)( start [1] * 10 + start [2] - '0' * 11));
1033	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));	1244	case 4: return newSViv (-(IV)( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
1034	case 5: return newSViv (-( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));	1245	case 5: return newSViv (-(IV)( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
1035	case 6: return newSViv (-(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));	1246	case 6: return newSViv (-(IV)(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));
1036	}	1247	}
1037	else	1248	else
1038	switch (len)	1249	switch (len)
1039	{	1250	{
1040	case 1: return newSViv ( start [0] - '0' * 1);	1251	case 1: return newSViv ( start [0] - '0' * 1);
1041	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);	1252	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
1042	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);	1253	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
1043	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);	1254	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
1044	case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);	1255	case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);
1045	}	1256	}
1046		1257
1047	{	1258	{
1048	UV uv;	1259	UV uv;
1049	int numtype = grok_number (start, len, &uv);	1260	int numtype = grok_number (start, len, &uv);
…		…
1058	}	1269	}
1059		1270
1060	len -= *start == '-' ? 1 : 0;	1271	len -= *start == '-' ? 1 : 0;
1061		1272
1062	// does not fit into IV or UV, try NV	1273	// does not fit into IV or UV, try NV
1063	if ((sizeof (NV) == sizeof (double) && DBL_DIG >= len)	1274	if (len <= NV_DIG)
1064	#if defined (LDBL_DIG)
1065	\|\| (sizeof (NV) == sizeof (long double) && LDBL_DIG >= len)
1066	#endif
1067	)
1068	// fits into NV without loss of precision	1275	// fits into NV without loss of precision
1069	return newSVnv (Atof (start));	1276	return newSVnv (json_atof (start));
1070		1277
1071	// everything else fails, convert it to a string	1278	// everything else fails, convert it to a string
1072	return newSVpvn (start, dec->cur - start);	1279	return newSVpvn (start, dec->cur - start);
1073	}	1280	}
1074		1281
1075	// loss of precision here	1282	// loss of precision here
1076	return newSVnv (Atof (start));	1283	return newSVnv (json_atof (start));
1077		1284
1078	fail:	1285	fail:
1079	return 0;	1286	return 0;
1080	}	1287	}
1081		1288
…		…
1105	if (*dec->cur == ']')	1312	if (*dec->cur == ']')
1106	{	1313	{
1107	++dec->cur;	1314	++dec->cur;
1108	break;	1315	break;
1109	}	1316	}
1110		1317
1111	if (*dec->cur != ',')	1318	if (*dec->cur != ',')
1112	ERR (", or ] expected while parsing array");	1319	ERR (", or ] expected while parsing array");
1113		1320
1114	++dec->cur;	1321	++dec->cur;
1115		1322
…		…
1157	char *p = dec->cur;	1364	char *p = dec->cur;
1158	char *e = p + 24; // only try up to 24 bytes	1365	char *e = p + 24; // only try up to 24 bytes
1159		1366
1160	for (;;)	1367	for (;;)
1161	{	1368	{
1162	// the >= 0x80 is true on most architectures	1369	// the >= 0x80 is false on most architectures
1163	if (p == e \|\| p < 0x20 \|\| p >= 0x80 \|\| *p == '\\')	1370	if (p == e \|\| p < 0x20 \|\| p >= 0x80 \|\| *p == '\\')
1164	{	1371	{
1165	// slow path, back up and use decode_str	1372	// slow path, back up and use decode_str
1166	SV *key = decode_str (dec);	1373	SV *key = decode_str (dec);
1167	if (!key)	1374	if (!key)
…		…
1239		1446
1240	hv_iterinit (hv);	1447	hv_iterinit (hv);
1241	he = hv_iternext (hv);	1448	he = hv_iternext (hv);
1242	hv_iterinit (hv);	1449	hv_iterinit (hv);
1243		1450
1244	// the next line creates a mortal sv each time its called.	1451	// the next line creates a mortal sv each time it's called.
1245	// might want to optimise this for common cases.	1452	// might want to optimise this for common cases.
1246	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);	1453	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);
1247		1454
1248	if (cb)	1455	if (cb)
1249	{	1456	{
1250	dSP;	1457	dSP;
1251	int count;	1458	int count;
1252		1459
1253	ENTER; SAVETMPS; PUSHMARK (SP);	1460	ENTER; SAVETMPS;
		1461	SAVESTACK_POS ();
		1462	PUSHMARK (SP);
1254	XPUSHs (HeVAL (he));	1463	XPUSHs (HeVAL (he));
		1464	sv_2mortal (sv);
1255		1465
1256	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;	1466	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
1257		1467
1258	if (count == 1)	1468	if (count == 1)
1259	{	1469	{
1260	sv = newSVsv (POPs);	1470	sv = newSVsv (POPs);
1261	FREETMPS; LEAVE;	1471	FREETMPS; LEAVE;
1262	return sv;	1472	return sv;
1263	}	1473	}
1264		1474
		1475	SvREFCNT_inc (sv);
1265	FREETMPS; LEAVE;	1476	FREETMPS; LEAVE;
1266	}	1477	}
1267	}	1478	}
1268		1479
1269	if (dec->json.cb_object)	1480	if (dec->json.cb_object)
1270	{	1481	{
1271	dSP;	1482	dSP;
1272	int count;	1483	int count;
1273		1484
1274	ENTER; SAVETMPS; PUSHMARK (SP);	1485	ENTER; SAVETMPS;
		1486	SAVESTACK_POS ();
		1487	PUSHMARK (SP);
1275	XPUSHs (sv_2mortal (sv));	1488	XPUSHs (sv_2mortal (sv));
1276		1489
1277	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;	1490	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;
1278		1491
1279	if (count == 1)	1492	if (count == 1)
…		…
1295	DEC_DEC_DEPTH;	1508	DEC_DEC_DEPTH;
1296	return 0;	1509	return 0;
1297	}	1510	}
1298		1511
1299	static SV *	1512	static SV *
		1513	decode_tag (dec_t *dec)
		1514	{
		1515	SV *tag = 0;
		1516	SV *val = 0;
		1517
		1518	if (!(dec->json.flags & F_ALLOW_TAGS))
		1519	ERR ("malformed JSON string, neither array, object, number, string or atom");
		1520
		1521	++dec->cur;
		1522
		1523	decode_ws (dec);
		1524
		1525	tag = decode_sv (dec);
		1526	if (!tag)
		1527	goto fail;
		1528
		1529	if (!SvPOK (tag))
		1530	ERR ("malformed JSON string, (tag) must be a string");
		1531
		1532	decode_ws (dec);
		1533
		1534	if (*dec->cur != ')')
		1535	ERR (") expected after tag");
		1536
		1537	++dec->cur;
		1538
		1539	decode_ws (dec);
		1540
		1541	val = decode_sv (dec);
		1542	if (!val)
		1543	goto fail;
		1544
		1545	if (!SvROK (val) \|\| SvTYPE (SvRV (val)) != SVt_PVAV)
		1546	ERR ("malformed JSON string, tag value must be an array");
		1547
		1548	{
		1549	AV av = (AV )SvRV (val);
		1550	int i, len = av_len (av) + 1;
		1551	HV *stash = gv_stashsv (tag, 0);
		1552	SV *sv;
		1553
		1554	if (!stash)
		1555	ERR ("cannot decode perl-object (package does not exist)");
		1556
		1557	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1558
		1559	if (!method)
		1560	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1561
		1562	dSP;
		1563
		1564	ENTER; SAVETMPS;
		1565	PUSHMARK (SP);
		1566	EXTEND (SP, len + 2);
		1567	// we re-bless the reference to get overload and other niceties right
		1568	PUSHs (tag);
		1569	PUSHs (sv_json);
		1570
		1571	for (i = 0; i < len; ++i)
		1572	PUSHs (*av_fetch (av, i, 1));
		1573
		1574	PUTBACK;
		1575	call_sv ((SV *)GvCV (method), G_SCALAR);
		1576	SPAGAIN;
		1577
		1578	SvREFCNT_dec (tag);
		1579	SvREFCNT_dec (val);
		1580	sv = SvREFCNT_inc (POPs);
		1581
		1582	PUTBACK;
		1583
		1584	FREETMPS; LEAVE;
		1585
		1586	return sv;
		1587	}
		1588
		1589	fail:
		1590	SvREFCNT_dec (tag);
		1591	SvREFCNT_dec (val);
		1592	return 0;
		1593	}
		1594
		1595	static SV *
1300	decode_sv (dec_t *dec)	1596	decode_sv (dec_t *dec)
1301	{	1597	{
1302	// the beauty of JSON: you need exactly one character lookahead	1598	// the beauty of JSON: you need exactly one character lookahead
1303	// to parse everything.	1599	// to parse everything.
1304	switch (*dec->cur)	1600	switch (*dec->cur)
1305	{	1601	{
1306	case '"': ++dec->cur; return decode_str (dec);	1602	case '"': ++dec->cur; return decode_str (dec);
1307	case '[': ++dec->cur; return decode_av (dec);	1603	case '[': ++dec->cur; return decode_av (dec);
1308	case '{': ++dec->cur; return decode_hv (dec);	1604	case '{': ++dec->cur; return decode_hv (dec);
		1605	case '(': return decode_tag (dec);
1309		1606
1310	case '-':	1607	case '-':
1311	case '0': case '1': case '2': case '3': case '4':	1608	case '0': case '1': case '2': case '3': case '4':
1312	case '5': case '6': case '7': case '8': case '9':	1609	case '5': case '6': case '7': case '8': case '9':
1313	return decode_num (dec);	1610	return decode_num (dec);
…		…
1315	case 't':	1612	case 't':
1316	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1613	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
1317	{	1614	{
1318	dec->cur += 4;	1615	dec->cur += 4;
1319	#if JSON_SLOW	1616	#if JSON_SLOW
1320	json_true = get_sv ("JSON::XS::true", 1); SvREADONLY_on (json_true);	1617	types_true = get_bool ("Types::Serialiser::true");
1321	#endif	1618	#endif
1322	return SvREFCNT_inc (json_true);	1619	return newSVsv (types_true);
1323	}	1620	}
1324	else	1621	else
1325	ERR ("'true' expected");	1622	ERR ("'true' expected");
1326		1623
1327	break;	1624	break;
…		…
1329	case 'f':	1626	case 'f':
1330	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))	1627	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
1331	{	1628	{
1332	dec->cur += 5;	1629	dec->cur += 5;
1333	#if JSON_SLOW	1630	#if JSON_SLOW
1334	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);	1631	types_false = get_bool ("Types::Serialiser::false");
1335	#endif	1632	#endif
1336	return SvREFCNT_inc (json_false);	1633	return newSVsv (types_false);
1337	}	1634	}
1338	else	1635	else
1339	ERR ("'false' expected");	1636	ERR ("'false' expected");
1340		1637
1341	break;	1638	break;
…		…
1350	ERR ("'null' expected");	1647	ERR ("'null' expected");
1351		1648
1352	break;	1649	break;
1353		1650
1354	default:	1651	default:
1355	ERR ("malformed JSON string, neither array, object, number, string or atom");	1652	ERR ("malformed JSON string, neither tag, array, object, number, string or atom");
1356	break;	1653	break;
1357	}	1654	}
1358		1655
1359	fail:	1656	fail:
1360	return 0;	1657	return 0;
1361	}	1658	}
1362		1659
1363	static SV *	1660	static SV *
1364	decode_json (SV string, JSON json, UV *offset_return)	1661	decode_json (SV string, JSON json, char **offset_return)
1365	{	1662	{
1366	dec_t dec;	1663	dec_t dec;
1367	UV offset;
1368	SV *sv;	1664	SV *sv;
1369		1665
		1666	/* work around bugs in 5.10 where manipulating magic values
		1667	* makes perl ignore the magic in subsequent accesses.
		1668	* also make a copy of non-PV values, to get them into a clean
		1669	* state (SvPV should do that, but it's buggy, see below).
		1670	*/
1370	SvGETMAGIC (string);	1671	/SvGETMAGIC (string);/
		1672	if (SvMAGICAL (string) \|\| !SvPOK (string))
		1673	string = sv_2mortal (newSVsv (string));
		1674
1371	SvUPGRADE (string, SVt_PV);	1675	SvUPGRADE (string, SVt_PV);
1372		1676
1373	if (json->flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (json->flags))	1677	/* work around a bug in perl 5.10, which causes SvCUR to fail an
		1678	* assertion with -DDEBUGGING, although SvCUR is documented to
		1679	* return the xpv_cur field which certainly exists after upgrading.
		1680	* according to nicholas clark, calling SvPOK fixes this.
		1681	* But it doesn't fix it, so try another workaround, call SvPV_nolen
		1682	* and hope for the best.
		1683	* Damnit, SvPV_nolen still trips over yet another assertion. This
		1684	* assertion business is seriously broken, try yet another workaround
		1685	* for the broken -DDEBUGGING.
		1686	*/
		1687	{
		1688	#ifdef DEBUGGING
		1689	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
		1690	#else
		1691	STRLEN offset = SvCUR (string);
		1692	#endif
		1693
		1694	if (offset > json->max_size && json->max_size)
1374	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",	1695	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
1375	(unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (json->flags));	1696	(unsigned long)SvCUR (string), (unsigned long)json->max_size);
		1697	}
1376		1698
1377	if (json->flags & F_UTF8)	1699	if (DECODE_WANTS_OCTETS (json))
1378	sv_utf8_downgrade (string, 0);	1700	sv_utf8_downgrade (string, 0);
1379	else	1701	else
1380	sv_utf8_upgrade (string);	1702	sv_utf8_upgrade (string);
1381		1703
1382	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1704	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
1383		1705
1384	dec.json = *json;	1706	dec.json = *json;
1385	dec.cur = SvPVX (string);	1707	dec.cur = SvPVX (string);
1386	dec.end = SvEND (string);	1708	dec.end = SvEND (string);
1387	dec.err = 0;	1709	dec.err = 0;
1388	dec.depth = 0;	1710	dec.depth = 0;
1389	dec.maxdepth = DEC_DEPTH (dec.json.flags);
1390		1711
1391	if (dec.json.cb_object \|\| dec.json.cb_sk_object)	1712	if (dec.json.cb_object \|\| dec.json.cb_sk_object)
1392	dec.json.flags \|= F_HOOK;	1713	dec.json.flags \|= F_HOOK;
1393		1714
1394	*dec.end = 0; // this should basically be a nop, too, but make sure it's there	1715	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
1395		1716
1396	decode_ws (&dec);	1717	decode_ws (&dec);
1397	sv = decode_sv (&dec);	1718	sv = decode_sv (&dec);
		1719
		1720	if (offset_return)
		1721	*offset_return = dec.cur;
1398		1722
1399	if (!(offset_return \|\| !sv))	1723	if (!(offset_return \|\| !sv))
1400	{	1724	{
1401	// check for trailing garbage	1725	// check for trailing garbage
1402	decode_ws (&dec);	1726	decode_ws (&dec);
…		…
1405	{	1729	{
1406	dec.err = "garbage after JSON object";	1730	dec.err = "garbage after JSON object";
1407	SvREFCNT_dec (sv);	1731	SvREFCNT_dec (sv);
1408	sv = 0;	1732	sv = 0;
1409	}	1733	}
1410	}
1411
1412	if (offset_return \|\| !sv)
1413	{
1414	offset = dec.json.flags & F_UTF8
1415	? dec.cur - SvPVX (string)
1416	: utf8_distance (dec.cur, SvPVX (string));
1417
1418	if (offset_return)
1419	*offset_return = offset;
1420	}	1734	}
1421		1735
1422	if (!sv)	1736	if (!sv)
1423	{	1737	{
1424	SV *uni = sv_newmortal ();	1738	SV *uni = sv_newmortal ();
…		…
1430	SAVEVPTR (PL_curcop);	1744	SAVEVPTR (PL_curcop);
1431	PL_curcop = &cop;	1745	PL_curcop = &cop;
1432	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);	1746	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);
1433	LEAVE;	1747	LEAVE;
1434		1748
1435	croak ("%s, at character offset %d [\"%s\"]",	1749	croak ("%s, at character offset %d (before \"%s\")",
1436	dec.err,	1750	dec.err,
1437	(int)offset,	1751	(int)ptr_to_index (string, dec.cur),
1438	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1752	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
1439	}	1753	}
1440		1754
1441	sv = sv_2mortal (sv);	1755	sv = sv_2mortal (sv);
1442		1756
1443	if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))	1757	if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))
1444	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");	1758	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
1445		1759
1446	return sv;	1760	return sv;
		1761	}
		1762
		1763	/////////////////////////////////////////////////////////////////////////////
		1764	// incremental parser
		1765
		1766	static void
		1767	incr_parse (JSON *self)
		1768	{
		1769	const char *p = SvPVX (self->incr_text) + self->incr_pos;
		1770
		1771	// the state machine here is a bit convoluted and could be simplified a lot
		1772	// but this would make it slower, so...
		1773
		1774	for (;;)
		1775	{
		1776	//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
		1777	switch (self->incr_mode)
		1778	{
		1779	// only used for initial whitespace skipping
		1780	case INCR_M_WS:
		1781	for (;;)
		1782	{
		1783	if (*p > 0x20)
		1784	{
		1785	if (*p == '#')
		1786	{
		1787	self->incr_mode = INCR_M_C0;
		1788	goto incr_m_c;
		1789	}
		1790	else
		1791	{
		1792	self->incr_mode = INCR_M_JSON;
		1793	goto incr_m_json;
		1794	}
		1795	}
		1796	else if (!*p)
		1797	goto interrupt;
		1798
		1799	++p;
		1800	}
		1801
		1802	// skip a single char inside a string (for \\-processing)
		1803	case INCR_M_BS:
		1804	if (!*p)
		1805	goto interrupt;
		1806
		1807	++p;
		1808	self->incr_mode = INCR_M_STR;
		1809	goto incr_m_str;
		1810
		1811	// inside #-style comments
		1812	case INCR_M_C0:
		1813	case INCR_M_C1:
		1814	incr_m_c:
		1815	for (;;)
		1816	{
		1817	if (*p == '\n')
		1818	{
		1819	self->incr_mode = self->incr_mode == INCR_M_C0 ? INCR_M_WS : INCR_M_JSON;
		1820	break;
		1821	}
		1822	else if (!*p)
		1823	goto interrupt;
		1824
		1825	++p;
		1826	}
		1827
		1828	break;
		1829
		1830	// inside a string
		1831	case INCR_M_STR:
		1832	incr_m_str:
		1833	for (;;)
		1834	{
		1835	if (*p == '"')
		1836	{
		1837	++p;
		1838	self->incr_mode = INCR_M_JSON;
		1839
		1840	if (!self->incr_nest)
		1841	goto interrupt;
		1842
		1843	goto incr_m_json;
		1844	}
		1845	else if (*p == '\\')
		1846	{
		1847	++p; // "virtually" consumes character after \
		1848
		1849	if (!*p) // if at end of string we have to switch modes
		1850	{
		1851	self->incr_mode = INCR_M_BS;
		1852	goto interrupt;
		1853	}
		1854	}
		1855	else if (!*p)
		1856	goto interrupt;
		1857
		1858	++p;
		1859	}
		1860
		1861	// after initial ws, outside string
		1862	case INCR_M_JSON:
		1863	incr_m_json:
		1864	for (;;)
		1865	{
		1866	switch (*p++)
		1867	{
		1868	case 0:
		1869	--p;
		1870	goto interrupt;
		1871
		1872	case 0x09:
		1873	case 0x0a:
		1874	case 0x0d:
		1875	case 0x20:
		1876	if (!self->incr_nest)
		1877	{
		1878	--p; // do not eat the whitespace, let the next round do it
		1879	goto interrupt;
		1880	}
		1881	break;
		1882
		1883	case '"':
		1884	self->incr_mode = INCR_M_STR;
		1885	goto incr_m_str;
		1886
		1887	case '[':
		1888	case '{':
		1889	case '(':
		1890	if (++self->incr_nest > self->max_depth)
		1891	croak (ERR_NESTING_EXCEEDED);
		1892	break;
		1893
		1894	case ']':
		1895	case '}':
		1896	if (--self->incr_nest <= 0)
		1897	goto interrupt;
		1898	break;
		1899
		1900	case ')':
		1901	--self->incr_nest;
		1902	break;
		1903
		1904	case '#':
		1905	self->incr_mode = INCR_M_C1;
		1906	goto incr_m_c;
		1907	}
		1908	}
		1909	}
		1910
		1911	modechange:
		1912	;
		1913	}
		1914
		1915	interrupt:
		1916	self->incr_pos = p - SvPVX (self->incr_text);
		1917	//printf ("interrupt<%.*s>\n", self->incr_pos, SvPVX(self->incr_text));//D
		1918	//printf ("return pos %d mode %d nest %d\n", self->incr_pos, self->incr_mode, self->incr_nest);//D
1447	}	1919	}
1448		1920
1449	/////////////////////////////////////////////////////////////////////////////	1921	/////////////////////////////////////////////////////////////////////////////
1450	// XS interface functions	1922	// XS interface functions
1451		1923
…		…
1460	i >= '0' && i <= '9' ? i - '0'	1932	i >= '0' && i <= '9' ? i - '0'
1461	: i >= 'a' && i <= 'f' ? i - 'a' + 10	1933	: i >= 'a' && i <= 'f' ? i - 'a' + 10
1462	: i >= 'A' && i <= 'F' ? i - 'A' + 10	1934	: i >= 'A' && i <= 'F' ? i - 'A' + 10
1463	: -1;	1935	: -1;
1464		1936
1465	json_stash = gv_stashpv ("JSON::XS" , 1);	1937	json_stash = gv_stashpv ("JSON::XS" , 1);
1466	json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);	1938	types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1467		1939
1468	json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true );	1940	types_true = get_bool ("Types::Serialiser::true");
1469	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);	1941	types_false = get_bool ("Types::Serialiser::false");
		1942
		1943	sv_json = newSVpv ("JSON", 0);
		1944	SvREADONLY_on (sv_json);
		1945
		1946	CvNODEBUG_on (get_cv ("JSON::XS::incr_text", 0)); /* the debugger completely breaks lvalue subs */
1470	}	1947	}
1471		1948
1472	PROTOTYPES: DISABLE	1949	PROTOTYPES: DISABLE
1473		1950
1474	void CLONE (...)	1951	void CLONE (...)
1475	CODE:	1952	CODE:
1476	json_stash = 0;	1953	json_stash = 0;
1477	json_boolean_stash = 0;	1954	types_boolean_stash = 0;
1478		1955
1479	void new (char *klass)	1956	void new (char *klass)
1480	PPCODE:	1957	PPCODE:
1481	{	1958	{
1482	SV *pv = NEWSV (0, sizeof (JSON));	1959	SV *pv = NEWSV (0, sizeof (JSON));
1483	SvPOK_only (pv);	1960	SvPOK_only (pv);
1484	Zero (SvPVX (pv), 1, JSON);	1961	json_init ((JSON *)SvPVX (pv));
1485	((JSON *)SvPVX (pv))->flags = F_DEFAULT;
1486	XPUSHs (sv_2mortal (sv_bless (	1962	XPUSHs (sv_2mortal (sv_bless (
1487	newRV_noinc (pv),	1963	newRV_noinc (pv),
1488	strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)	1964	strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)
1489	)));	1965	)));
1490	}	1966	}
…		…
1502	allow_nonref = F_ALLOW_NONREF	1978	allow_nonref = F_ALLOW_NONREF
1503	shrink = F_SHRINK	1979	shrink = F_SHRINK
1504	allow_blessed = F_ALLOW_BLESSED	1980	allow_blessed = F_ALLOW_BLESSED
1505	convert_blessed = F_CONV_BLESSED	1981	convert_blessed = F_CONV_BLESSED
1506	relaxed = F_RELAXED	1982	relaxed = F_RELAXED
		1983	allow_unknown = F_ALLOW_UNKNOWN
		1984	allow_tags = F_ALLOW_TAGS
1507	PPCODE:	1985	PPCODE:
1508	{	1986	{
1509	if (enable)	1987	if (enable)
1510	self->flags \|= ix;	1988	self->flags \|= ix;
1511	else	1989	else
…		…
1526	get_allow_nonref = F_ALLOW_NONREF	2004	get_allow_nonref = F_ALLOW_NONREF
1527	get_shrink = F_SHRINK	2005	get_shrink = F_SHRINK
1528	get_allow_blessed = F_ALLOW_BLESSED	2006	get_allow_blessed = F_ALLOW_BLESSED
1529	get_convert_blessed = F_CONV_BLESSED	2007	get_convert_blessed = F_CONV_BLESSED
1530	get_relaxed = F_RELAXED	2008	get_relaxed = F_RELAXED
		2009	get_allow_unknown = F_ALLOW_UNKNOWN
		2010	get_allow_tags = F_ALLOW_TAGS
1531	PPCODE:	2011	PPCODE:
1532	XPUSHs (boolSV (self->flags & ix));	2012	XPUSHs (boolSV (self->flags & ix));
1533		2013
1534	void max_depth (JSON *self, UV max_depth = 0x80000000UL)	2014	void max_depth (JSON *self, U32 max_depth = 0x80000000UL)
1535	PPCODE:	2015	PPCODE:
1536	{	2016	self->max_depth = max_depth;
1537	UV log2 = 0;
1538
1539	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;
1540
1541	while ((1UL << log2) < max_depth)
1542	++log2;
1543
1544	self->flags = self->flags & ~F_MAXDEPTH \| (log2 << S_MAXDEPTH);
1545
1546	XPUSHs (ST (0));	2017	XPUSHs (ST (0));
1547	}
1548		2018
1549	U32 get_max_depth (JSON *self)	2019	U32 get_max_depth (JSON *self)
1550	CODE:	2020	CODE:
1551	RETVAL = DEC_DEPTH (self->flags);	2021	RETVAL = self->max_depth;
1552	OUTPUT:	2022	OUTPUT:
1553	RETVAL	2023	RETVAL
1554		2024
1555	void max_size (JSON *self, UV max_size = 0)	2025	void max_size (JSON *self, U32 max_size = 0)
1556	PPCODE:	2026	PPCODE:
1557	{	2027	self->max_size = max_size;
1558	UV log2 = 0;
1559
1560	if (max_size > 0x80000000UL) max_size = 0x80000000UL;
1561	if (max_size == 1) max_size = 2;
1562
1563	while ((1UL << log2) < max_size)
1564	++log2;
1565
1566	self->flags = self->flags & ~F_MAXSIZE \| (log2 << S_MAXSIZE);
1567
1568	XPUSHs (ST (0));	2028	XPUSHs (ST (0));
1569	}
1570		2029
1571	int get_max_size (JSON *self)	2030	int get_max_size (JSON *self)
1572	CODE:	2031	CODE:
1573	RETVAL = DEC_SIZE (self->flags);	2032	RETVAL = self->max_size;
1574	OUTPUT:	2033	OUTPUT:
1575	RETVAL	2034	RETVAL
1576		2035
1577	void filter_json_object (JSON self, SV cb = &PL_sv_undef)	2036	void filter_json_object (JSON self, SV cb = &PL_sv_undef)
1578	PPCODE:	2037	PPCODE:
…		…
1584	}	2043	}
1585		2044
1586	void filter_json_single_key_object (JSON self, SV key, SV *cb = &PL_sv_undef)	2045	void filter_json_single_key_object (JSON self, SV key, SV *cb = &PL_sv_undef)
1587	PPCODE:	2046	PPCODE:
1588	{	2047	{
1589	if (!self->cb_sk_object)	2048	if (!self->cb_sk_object)
1590	self->cb_sk_object = newHV ();	2049	self->cb_sk_object = newHV ();
1591		2050
1592	if (SvOK (cb))	2051	if (SvOK (cb))
1593	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);	2052	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1594	else	2053	else
…		…
1605	XPUSHs (ST (0));	2064	XPUSHs (ST (0));
1606	}	2065	}
1607		2066
1608	void encode (JSON self, SV scalar)	2067	void encode (JSON self, SV scalar)
1609	PPCODE:	2068	PPCODE:
1610	XPUSHs (encode_json (scalar, self));	2069	PUTBACK; scalar = encode_json (scalar, self); SPAGAIN;
		2070	XPUSHs (scalar);
1611		2071
1612	void decode (JSON self, SV jsonstr)	2072	void decode (JSON self, SV jsonstr)
1613	PPCODE:	2073	PPCODE:
1614	XPUSHs (decode_json (jsonstr, self, 0));	2074	PUTBACK; jsonstr = decode_json (jsonstr, self, 0); SPAGAIN;
		2075	XPUSHs (jsonstr);
1615		2076
1616	void decode_prefix (JSON self, SV jsonstr)	2077	void decode_prefix (JSON self, SV jsonstr)
1617	PPCODE:	2078	PPCODE:
1618	{	2079	{
1619	UV offset;	2080	SV *sv;
		2081	char *offset;
		2082	PUTBACK; sv = decode_json (jsonstr, self, &offset); SPAGAIN;
1620	EXTEND (SP, 2);	2083	EXTEND (SP, 2);
1621	PUSHs (decode_json (jsonstr, self, &offset));	2084	PUSHs (sv);
1622	PUSHs (sv_2mortal (newSVuv (offset)));	2085	PUSHs (sv_2mortal (newSVuv (ptr_to_index (jsonstr, offset))));
		2086	}
		2087
		2088	void incr_parse (JSON self, SV jsonstr = 0)
		2089	PPCODE:
		2090	{
		2091	if (!self->incr_text)
		2092	self->incr_text = newSVpvn ("", 0);
		2093
		2094	/* if utf8-ness doesn't match the decoder, need to upgrade/downgrade */
		2095	if (!DECODE_WANTS_OCTETS (self) == !SvUTF8 (self->incr_text))
		2096	if (DECODE_WANTS_OCTETS (self))
		2097	{
		2098	if (self->incr_pos)
		2099	self->incr_pos = utf8_length ((U8 *)SvPVX (self->incr_text),
		2100	(U8 *)SvPVX (self->incr_text) + self->incr_pos);
		2101
		2102	sv_utf8_downgrade (self->incr_text, 0);
		2103	}
		2104	else
		2105	{
		2106	sv_utf8_upgrade (self->incr_text);
		2107
		2108	if (self->incr_pos)
		2109	self->incr_pos = utf8_hop ((U8 *)SvPVX (self->incr_text), self->incr_pos)
		2110	- (U8 *)SvPVX (self->incr_text);
		2111	}
		2112
		2113	// append data, if any
		2114	if (jsonstr)
		2115	{
		2116	/* make sure both strings have same encoding */
		2117	if (SvUTF8 (jsonstr) != SvUTF8 (self->incr_text))
		2118	if (SvUTF8 (jsonstr))
		2119	sv_utf8_downgrade (jsonstr, 0);
		2120	else
		2121	sv_utf8_upgrade (jsonstr);
		2122
		2123	/* and then just blindly append */
		2124	{
		2125	STRLEN len;
		2126	const char *str = SvPV (jsonstr, len);
		2127	STRLEN cur = SvCUR (self->incr_text);
		2128
		2129	if (SvLEN (self->incr_text) <= cur + len)
		2130	SvGROW (self->incr_text, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
		2131
		2132	Move (str, SvEND (self->incr_text), len, char);
		2133	SvCUR_set (self->incr_text, SvCUR (self->incr_text) + len);
		2134	*SvEND (self->incr_text) = 0; // this should basically be a nop, too, but make sure it's there
		2135	}
		2136	}
		2137
		2138	if (GIMME_V != G_VOID)
		2139	do
		2140	{
		2141	SV *sv;
		2142	char *offset;
		2143
		2144	if (!INCR_DONE (self))
		2145	{
		2146	incr_parse (self);
		2147
		2148	if (self->incr_pos > self->max_size && self->max_size)
		2149	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		2150	(unsigned long)self->incr_pos, (unsigned long)self->max_size);
		2151
		2152	if (!INCR_DONE (self))
		2153	{
		2154	// as an optimisation, do not accumulate white space in the incr buffer
		2155	if (self->incr_mode == INCR_M_WS && self->incr_pos)
		2156	{
		2157	self->incr_pos = 0;
		2158	SvCUR_set (self->incr_text, 0);
		2159	}
		2160
		2161	break;
		2162	}
		2163	}
		2164
		2165	PUTBACK; sv = decode_json (self->incr_text, self, &offset); SPAGAIN;
		2166	XPUSHs (sv);
		2167
		2168	self->incr_pos -= offset - SvPVX (self->incr_text);
		2169	self->incr_nest = 0;
		2170	self->incr_mode = 0;
		2171
		2172	sv_chop (self->incr_text, offset);
		2173	}
		2174	while (GIMME_V == G_ARRAY);
		2175	}
		2176
		2177	SV incr_text (JSON self)
		2178	ATTRS: lvalue
		2179	CODE:
		2180	{
		2181	if (self->incr_pos)
		2182	croak ("incr_text can not be called when the incremental parser already started parsing");
		2183
		2184	RETVAL = self->incr_text ? SvREFCNT_inc (self->incr_text) : &PL_sv_undef;
		2185	}
		2186	OUTPUT:
		2187	RETVAL
		2188
		2189	void incr_skip (JSON *self)
		2190	CODE:
		2191	{
		2192	if (self->incr_pos)
		2193	{
		2194	sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + self->incr_pos);
		2195	self->incr_pos = 0;
		2196	self->incr_nest = 0;
		2197	self->incr_mode = 0;
		2198	}
		2199	}
		2200
		2201	void incr_reset (JSON *self)
		2202	CODE:
		2203	{
		2204	SvREFCNT_dec (self->incr_text);
		2205	self->incr_text = 0;
		2206	self->incr_pos = 0;
		2207	self->incr_nest = 0;
		2208	self->incr_mode = 0;
1623	}	2209	}
1624		2210
1625	void DESTROY (JSON *self)	2211	void DESTROY (JSON *self)
1626	CODE:	2212	CODE:
1627	SvREFCNT_dec (self->cb_sk_object);	2213	SvREFCNT_dec (self->cb_sk_object);
1628	SvREFCNT_dec (self->cb_object);	2214	SvREFCNT_dec (self->cb_object);
		2215	SvREFCNT_dec (self->incr_text);
1629		2216
1630	PROTOTYPES: ENABLE	2217	PROTOTYPES: ENABLE
1631		2218
1632	void encode_json (SV *scalar)	2219	void encode_json (SV *scalar)
1633	PPCODE:	2220	PPCODE:
1634	{	2221	{
1635	JSON json = { F_DEFAULT \| F_UTF8 };	2222	JSON json;
1636	XPUSHs (encode_json (scalar, &json));	2223	json_init (&json);
		2224	json.flags \|= F_UTF8;
		2225	PUTBACK; scalar = encode_json (scalar, &json); SPAGAIN;
		2226	XPUSHs (scalar);
1637	}	2227	}
1638		2228
1639	void decode_json (SV *jsonstr)	2229	void decode_json (SV *jsonstr)
1640	PPCODE:	2230	PPCODE:
1641	{	2231	{
1642	JSON json = { F_DEFAULT \| F_UTF8 };	2232	JSON json;
1643	XPUSHs (decode_json (jsonstr, &json, 0));	2233	json_init (&json);
		2234	json.flags \|= F_UTF8;
		2235	PUTBACK; jsonstr = decode_json (jsonstr, &json, 0); SPAGAIN;
		2236	XPUSHs (jsonstr);
1644	}	2237	}
1645		2238

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Comparing JSON-XS/XS.xs (file contents): Revision 1.73 by root, Wed Mar 19 13:44:43 2008 UTC vs. Revision 1.125 by root, Sun Feb 21 15:37:53 2016 UTC

Diff Legend

Comparing JSON-XS/XS.xs (file contents):
Revision 1.73 by root, Wed Mar 19 13:44:43 2008 UTC vs.
Revision 1.125 by root, Sun Feb 21 15:37:53 2016 UTC