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Comparing JSON-XS/XS.xs (file contents):
Revision 1.38 by root, Mon Jun 11 03:18:07 2007 UTC vs.
Revision 1.90 by root, Sun Jul 20 17:55:19 2008 UTC

1	#include "EXTERN.h"	1	#include "EXTERN.h"
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
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>
		10	#include <float.h>
9		11
10	#if defined(__BORLANDC__) || defined(_MSC_VER)	12	#if defined(__BORLANDC__) || defined(_MSC_VER)
11	# define snprintf _snprintf // C compilers have this in stdio.h	13	# define snprintf _snprintf // C compilers have this in stdio.h
12	#endif	14	#endif
13		15
		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.
		18	#ifndef UTF8_MAXBYTES
		19	# define UTF8_MAXBYTES 13
		20	#endif
		21
		22	#define IVUV_MAXCHARS (sizeof (UV) * CHAR_BIT * 28 / 93 + 2)
		23
14	#define F_ASCII 0x00000001UL	24	#define F_ASCII 0x00000001UL
15	#define F_LATIN1 0x00000002UL	25	#define F_LATIN1 0x00000002UL
16	#define F_UTF8 0x00000004UL	26	#define F_UTF8 0x00000004UL
17	#define F_INDENT 0x00000008UL	27	#define F_INDENT 0x00000008UL
18	#define F_CANONICAL 0x00000010UL	28	#define F_CANONICAL 0x00000010UL
19	#define F_SPACE_BEFORE 0x00000020UL	29	#define F_SPACE_BEFORE 0x00000020UL
20	#define F_SPACE_AFTER 0x00000040UL	30	#define F_SPACE_AFTER 0x00000040UL
21	#define F_ALLOW_NONREF 0x00000100UL	31	#define F_ALLOW_NONREF 0x00000100UL
22	#define F_SHRINK 0x00000200UL	32	#define F_SHRINK 0x00000200UL
		33	#define F_ALLOW_BLESSED 0x00000400UL
		34	#define F_CONV_BLESSED 0x00000800UL
23	#define F_MAXDEPTH 0xf8000000UL	35	#define F_RELAXED 0x00001000UL
24	#define S_MAXDEPTH 27	36	#define F_ALLOW_UNKNOWN 0x00002000UL
25		37	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
26	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
27
28	// F_SELFCONVERT? <=> to_json/toJson
29	// F_BLESSED? <=> { $__class__$ => }
30		38
31	#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER	39	#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER
32	#define F_DEFAULT (9UL << S_MAXDEPTH)
33		40
34	#define INIT_SIZE 32 // initial scalar size to be allocated	41	#define INIT_SIZE 32 // initial scalar size to be allocated
35	#define INDENT_STEP 3 // spaces per indentation level	42	#define INDENT_STEP 3 // spaces per indentation level
36		43
37	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size	44	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size
38		45
39	#define SB do {	46	#define SB do {
40	#define SE } while (0)	47	#define SE } while (0)
41		48
42	#if __GNUC__ >= 3	49	#if __GNUC__ >= 3
43	# define expect(expr,value) __builtin_expect ((expr),(value))	50	# define expect(expr,value) __builtin_expect ((expr), (value))
44	# define inline inline	51	# define INLINE static inline
45	#else	52	#else
46	# define expect(expr,value) (expr)	53	# define expect(expr,value) (expr)
47	# define inline static	54	# define INLINE static
48	#endif	55	#endif
49		56
50	#define expect_false(expr) expect ((expr) != 0, 0)	57	#define expect_false(expr) expect ((expr) != 0, 0)
51	#define expect_true(expr) expect ((expr) != 0, 1)	58	#define expect_true(expr) expect ((expr) != 0, 1)
52		59
		60	#define IN_RANGE_INC(type,val,beg,end) \
		61	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
		62	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
		63
		64	#define ERR_NESTING_EXCEEDED "json text or perl structure exceeds maximum nesting level (max_depth set too low?)"
		65
		66	#ifdef USE_ITHREADS
		67	# define JSON_SLOW 1
		68	# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1))
		69	#else
		70	# define JSON_SLOW 0
		71	# define JSON_STASH json_stash
		72	#endif
		73
53	static HV *json_stash; // JSON::XS::	74	static HV *json_stash, *json_boolean_stash; // JSON::XS::
		75	static SV *json_true, *json_false;
		76
		77	enum {
		78	INCR_M_WS = 0, // initial whitespace skipping, must be 0
		79	INCR_M_STR, // inside string
		80	INCR_M_BS, // inside backslash
		81	INCR_M_JSON // outside anything, count nesting
		82	};
		83
		84	#define INCR_DONE(json) ((json)->incr_nest <= 0 && (json)->incr_mode == INCR_M_JSON)
		85
		86	typedef struct {
		87	U32 flags;
		88	U32 max_depth;
		89	STRLEN max_size;
		90
		91	SV *cb_object;
		92	HV *cb_sk_object;
		93
		94	// for the incremental parser
		95	SV *incr_text; // the source text so far
		96	STRLEN incr_pos; // the current offset into the text
		97	int incr_nest; // {[]}-nesting level
		98	unsigned char incr_mode;
		99	} JSON;
		100
		101	INLINE void
		102	json_init (JSON *json)
		103	{
		104	Zero (json, 1, JSON);
		105	json->max_depth = 512;
		106	}
54		107
55	/////////////////////////////////////////////////////////////////////////////	108	/////////////////////////////////////////////////////////////////////////////
56	// utility functions	109	// utility functions
57		110
58	static UV *	111	INLINE SV *
59	SvJSON (SV *sv)	112	get_bool (const char *name)
60	{	113	{
61	if (!(SvROK (sv) && SvOBJECT (SvRV (sv)) && SvSTASH (SvRV (sv)) == json_stash))	114	SV *sv = get_sv (name, 1);
62	croak ("object is not of type JSON::XS");
63		115
64	return &SvUVX (SvRV (sv));	116	SvREADONLY_on (sv);
65	}	117	SvREADONLY_on (SvRV (sv));
66		118
67	static void	119	return sv;
		120	}
		121
		122	INLINE void
68	shrink (SV *sv)	123	shrink (SV *sv)
69	{	124	{
70	sv_utf8_downgrade (sv, 1);	125	sv_utf8_downgrade (sv, 1);
		126
71	if (SvLEN (sv) > SvCUR (sv) + 1)	127	if (SvLEN (sv) > SvCUR (sv) + 1)
72	{	128	{
73	#ifdef SvPV_shrink_to_cur	129	#ifdef SvPV_shrink_to_cur
74	SvPV_shrink_to_cur (sv);	130	SvPV_shrink_to_cur (sv);
75	#elif defined (SvPV_renew)	131	#elif defined (SvPV_renew)
…		…
81	// decode an utf-8 character and return it, or (UV)-1 in	137	// decode an utf-8 character and return it, or (UV)-1 in
82	// case of an error.	138	// case of an error.
83	// we special-case "safe" characters from U+80 .. U+7FF,	139	// we special-case "safe" characters from U+80 .. U+7FF,
84	// but use the very good perl function to parse anything else.	140	// but use the very good perl function to parse anything else.
85	// note that we never call this function for a ascii codepoints	141	// note that we never call this function for a ascii codepoints
86	inline UV	142	INLINE UV
87	decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)	143	decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)
88	{	144	{
89	if (expect_false (s[0] > 0xdf || s[0] < 0xc2))	145	if (expect_true (len >= 2
90	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);	146	&& IN_RANGE_INC (char, s[0], 0xc2, 0xdf)
91	else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf)	147	&& IN_RANGE_INC (char, s[1], 0x80, 0xbf)))
92	{	148	{
93	*clen = 2;	149	*clen = 2;
94	return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);	150	return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);
95	}	151	}
96	else	152	else
97	{	153	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);
98	*clen = (STRLEN)-1;	154	}
99	return (UV)-1;	155
100	}	156	// likewise for encoding, also never called for ascii codepoints
		157	// this function takes advantage of this fact, although current gccs
		158	// seem to optimise the check for >= 0x80 away anyways
		159	INLINE unsigned char *
		160	encode_utf8 (unsigned char *s, UV ch)
		161	{
		162	if (expect_false (ch < 0x000080))
		163	*s++ = ch;
		164	else if (expect_true (ch < 0x000800))
		165	*s++ = 0xc0 | ( ch >> 6),
		166	*s++ = 0x80 | ( ch & 0x3f);
		167	else if ( ch < 0x010000)
		168	*s++ = 0xe0 | ( ch >> 12),
		169	*s++ = 0x80 | ((ch >> 6) & 0x3f),
		170	*s++ = 0x80 | ( ch & 0x3f);
		171	else if ( ch < 0x110000)
		172	*s++ = 0xf0 | ( ch >> 18),
		173	*s++ = 0x80 | ((ch >> 12) & 0x3f),
		174	*s++ = 0x80 | ((ch >> 6) & 0x3f),
		175	*s++ = 0x80 | ( ch & 0x3f);
		176
		177	return s;
101	}	178	}
102		179
103	/////////////////////////////////////////////////////////////////////////////	180	/////////////////////////////////////////////////////////////////////////////
104	// encoder	181	// encoder
105		182
…		…
107	typedef struct	184	typedef struct
108	{	185	{
109	char *cur; // SvPVX (sv) + current output position	186	char *cur; // SvPVX (sv) + current output position
110	char *end; // SvEND (sv)	187	char *end; // SvEND (sv)
111	SV *sv; // result scalar	188	SV *sv; // result scalar
112	U32 flags; // F_*	189	JSON json;
113	U32 indent; // indentation level	190	U32 indent; // indentation level
114	U32 maxdepth; // max. indentation/recursion level	191	UV limit; // escape character values >= this value when encoding
115	} enc_t;	192	} enc_t;
116		193
117	inline void	194	INLINE void
118	need (enc_t *enc, STRLEN len)	195	need (enc_t *enc, STRLEN len)
119	{	196	{
120	if (expect_false (enc->cur + len >= enc->end))	197	if (expect_false (enc->cur + len >= enc->end))
121	{	198	{
122	STRLEN cur = enc->cur - SvPVX (enc->sv);	199	STRLEN cur = enc->cur - SvPVX (enc->sv);
…		…
124	enc->cur = SvPVX (enc->sv) + cur;	201	enc->cur = SvPVX (enc->sv) + cur;
125	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	202	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
126	}	203	}
127	}	204	}
128		205
129	inline void	206	INLINE void
130	encode_ch (enc_t *enc, char ch)	207	encode_ch (enc_t *enc, char ch)
131	{	208	{
132	need (enc, 1);	209	need (enc, 1);
133	*enc->cur++ = ch;	210	*enc->cur++ = ch;
134	}	211	}
…		…
178	STRLEN clen;	255	STRLEN clen;
179	UV uch;	256	UV uch;
180		257
181	if (is_utf8)	258	if (is_utf8)
182	{	259	{
183	//uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY);
184	uch = decode_utf8 (str, end - str, &clen);	260	uch = decode_utf8 (str, end - str, &clen);
185	if (clen == (STRLEN)-1)	261	if (clen == (STRLEN)-1)
186	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);	262	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);
187	}	263	}
188	else	264	else
189	{	265	{
190	uch = ch;	266	uch = ch;
191	clen = 1;	267	clen = 1;
192	}	268	}
193		269
194	if (uch > 0x10FFFFUL)	270	if (uch < 0x80/*0x20*/ || uch >= enc->limit)
195	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
196
197	if (uch < 0x80 || enc->flags & F_ASCII || (enc->flags & F_LATIN1 && uch > 0xFF))
198	{	271	{
199	if (uch > 0xFFFFUL)	272	if (uch >= 0x10000UL)
200	{	273	{
		274	if (uch >= 0x110000UL)
		275	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
		276
201	need (enc, len += 11);	277	need (enc, len += 11);
202	sprintf (enc->cur, "\\u%04x\\u%04x",	278	sprintf (enc->cur, "\\u%04x\\u%04x",
203	(int)((uch - 0x10000) / 0x400 + 0xD800),	279	(int)((uch - 0x10000) / 0x400 + 0xD800),
204	(int)((uch - 0x10000) % 0x400 + 0xDC00));	280	(int)((uch - 0x10000) % 0x400 + 0xDC00));
205	enc->cur += 12;	281	enc->cur += 12;
…		…
216	*enc->cur++ = hexdigit [(uch >> 0) & 15];	292	*enc->cur++ = hexdigit [(uch >> 0) & 15];
217	}	293	}
218		294
219	str += clen;	295	str += clen;
220	}	296	}
221	else if (enc->flags & F_LATIN1)	297	else if (enc->json.flags & F_LATIN1)
222	{	298	{
223	*enc->cur++ = uch;	299	*enc->cur++ = uch;
224	str += clen;	300	str += clen;
225	}	301	}
226	else if (is_utf8)	302	else if (is_utf8)
…		…
233	while (--clen);	309	while (--clen);
234	}	310	}
235	else	311	else
236	{	312	{
237	need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed	313	need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed
238	enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0);	314	enc->cur = encode_utf8 (enc->cur, uch);
239	++str;	315	++str;
240	}	316	}
241	}	317	}
242	}	318	}
243	}	319	}
244		320
245	--len;	321	--len;
246	}	322	}
247	}	323	}
248		324
249	inline void	325	INLINE void
250	encode_indent (enc_t *enc)	326	encode_indent (enc_t *enc)
251	{	327	{
252	if (enc->flags & F_INDENT)	328	if (enc->json.flags & F_INDENT)
253	{	329	{
254	int spaces = enc->indent * INDENT_STEP;	330	int spaces = enc->indent * INDENT_STEP;
255		331
256	need (enc, spaces);	332	need (enc, spaces);
257	memset (enc->cur, ' ', spaces);	333	memset (enc->cur, ' ', spaces);
258	enc->cur += spaces;	334	enc->cur += spaces;
259	}	335	}
260	}	336	}
261		337
262	inline void	338	INLINE void
263	encode_space (enc_t *enc)	339	encode_space (enc_t *enc)
264	{	340	{
265	need (enc, 1);	341	need (enc, 1);
266	encode_ch (enc, ' ');	342	encode_ch (enc, ' ');
267	}	343	}
268		344
269	inline void	345	INLINE void
270	encode_nl (enc_t *enc)	346	encode_nl (enc_t *enc)
271	{	347	{
272	if (enc->flags & F_INDENT)	348	if (enc->json.flags & F_INDENT)
273	{	349	{
274	need (enc, 1);	350	need (enc, 1);
275	encode_ch (enc, '\n');	351	encode_ch (enc, '\n');
276	}	352	}
277	}	353	}
278		354
279	inline void	355	INLINE void
280	encode_comma (enc_t *enc)	356	encode_comma (enc_t *enc)
281	{	357	{
282	encode_ch (enc, ',');	358	encode_ch (enc, ',');
283		359
284	if (enc->flags & F_INDENT)	360	if (enc->json.flags & F_INDENT)
285	encode_nl (enc);	361	encode_nl (enc);
286	else if (enc->flags & F_SPACE_AFTER)	362	else if (enc->json.flags & F_SPACE_AFTER)
287	encode_space (enc);	363	encode_space (enc);
288	}	364	}
289		365
290	static void encode_sv (enc_t *enc, SV *sv);	366	static void encode_sv (enc_t *enc, SV *sv);
291		367
292	static void	368	static void
293	encode_av (enc_t *enc, AV *av)	369	encode_av (enc_t *enc, AV *av)
294	{	370	{
295	int i, len = av_len (av);	371	int i, len = av_len (av);
296		372
297	if (enc->indent >= enc->maxdepth)	373	if (enc->indent >= enc->json.max_depth)
298	croak ("data structure too deep (hit recursion limit)");	374	croak (ERR_NESTING_EXCEEDED);
299		375
300	encode_ch (enc, '['); encode_nl (enc);	376	encode_ch (enc, '[');
301	++enc->indent;	377
		378	if (len >= 0)
		379	{
		380	encode_nl (enc); ++enc->indent;
302		381
303	for (i = 0; i <= len; ++i)	382	for (i = 0; i <= len; ++i)
304	{	383	{
		384	SV **svp = av_fetch (av, i, 0);
		385
305	encode_indent (enc);	386	encode_indent (enc);
306	encode_sv (enc, *av_fetch (av, i, 0));
307		387
		388	if (svp)
		389	encode_sv (enc, *svp);
		390	else
		391	encode_str (enc, "null", 4, 0);
		392
308	if (i < len)	393	if (i < len)
309	encode_comma (enc);	394	encode_comma (enc);
310	}	395	}
311		396
		397	encode_nl (enc); --enc->indent; encode_indent (enc);
		398	}
		399
312	encode_nl (enc);	400	encode_ch (enc, ']');
313
314	--enc->indent;
315	encode_indent (enc); encode_ch (enc, ']');
316	}	401	}
317		402
318	static void	403	static void
319	encode_he (enc_t *enc, HE *he)	404	encode_hk (enc_t *enc, HE *he)
320	{	405	{
321	encode_ch (enc, '"');	406	encode_ch (enc, '"');
322		407
323	if (HeKLEN (he) == HEf_SVKEY)	408	if (HeKLEN (he) == HEf_SVKEY)
324	{	409	{
…		…
334	else	419	else
335	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));	420	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));
336		421
337	encode_ch (enc, '"');	422	encode_ch (enc, '"');
338		423
339	if (enc->flags & F_SPACE_BEFORE) encode_space (enc);	424	if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);
340	encode_ch (enc, ':');	425	encode_ch (enc, ':');
341	if (enc->flags & F_SPACE_AFTER ) encode_space (enc);	426	if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);
342	encode_sv (enc, HeVAL (he));
343	}	427	}
344		428
345	// compare hash entries, used when all keys are bytestrings	429	// compare hash entries, used when all keys are bytestrings
346	static int	430	static int
347	he_cmp_fast (const void *a_, const void *b_)	431	he_cmp_fast (const void *a_, const void *b_)
…		…
352	HE *b = *(HE **)b_;	436	HE *b = *(HE **)b_;
353		437
354	STRLEN la = HeKLEN (a);	438	STRLEN la = HeKLEN (a);
355	STRLEN lb = HeKLEN (b);	439	STRLEN lb = HeKLEN (b);
356		440
357	if (!(cmp = memcmp (HeKEY (a), HeKEY (b), la < lb ? la : lb)))	441	if (!(cmp = memcmp (HeKEY (b), HeKEY (a), lb < la ? lb : la)))
358	cmp = la - lb;	442	cmp = lb - la;
359		443
360	return cmp;	444	return cmp;
361	}	445	}
362		446
363	// compare hash entries, used when some keys are sv's or utf-x	447	// compare hash entries, used when some keys are sv's or utf-x
364	static int	448	static int
365	he_cmp_slow (const void *a, const void *b)	449	he_cmp_slow (const void *a, const void *b)
366	{	450	{
367	return sv_cmp (HeSVKEY_force (*(HE **)a), HeSVKEY_force (*(HE **)b));	451	return sv_cmp (HeSVKEY_force (*(HE **)b), HeSVKEY_force (*(HE **)a));
368	}	452	}
369		453
370	static void	454	static void
371	encode_hv (enc_t *enc, HV *hv)	455	encode_hv (enc_t *enc, HV *hv)
372	{	456	{
373	int count, i;	457	HE *he;
374		458
375	if (enc->indent >= enc->maxdepth)	459	if (enc->indent >= enc->json.max_depth)
376	croak ("data structure too deep (hit recursion limit)");	460	croak (ERR_NESTING_EXCEEDED);
377		461
378	encode_ch (enc, '{'); encode_nl (enc); ++enc->indent;	462	encode_ch (enc, '{');
379		463
380	if ((count = hv_iterinit (hv)))
381	{
382	// for canonical output we have to sort by keys first	464	// for canonical output we have to sort by keys first
383	// actually, this is mostly due to the stupid so-called	465	// actually, this is mostly due to the stupid so-called
384	// security workaround added somewhere in 5.8.x.	466	// security workaround added somewhere in 5.8.x.
385	// that randomises hash orderings	467	// that randomises hash orderings
386	if (enc->flags & F_CANONICAL)	468	if (enc->json.flags & F_CANONICAL)
		469	{
		470	int count = hv_iterinit (hv);
		471
		472	if (SvMAGICAL (hv))
387	{	473	{
		474	// need to count by iterating. could improve by dynamically building the vector below
		475	// but I don't care for the speed of this special case.
		476	// note also that we will run into undefined behaviour when the two iterations
		477	// do not result in the same count, something I might care for in some later release.
		478
		479	count = 0;
		480	while (hv_iternext (hv))
		481	++count;
		482
		483	hv_iterinit (hv);
		484	}
		485
		486	if (count)
		487	{
388	int fast = 1;	488	int i, fast = 1;
389	HE *he;
390	#if defined(__BORLANDC__) || defined(_MSC_VER)	489	#if defined(__BORLANDC__) || defined(_MSC_VER)
391	HE **hes = _alloca (count * sizeof (HE));	490	HE **hes = _alloca (count * sizeof (HE));
392	#else	491	#else
393	HE *hes [count]; // if your compiler dies here, you need to enable C99 mode	492	HE *hes [count]; // if your compiler dies here, you need to enable C99 mode
394	#endif	493	#endif
…		…
421		520
422	FREETMPS;	521	FREETMPS;
423	LEAVE;	522	LEAVE;
424	}	523	}
425		524
426	for (i = 0; i < count; ++i)	525	encode_nl (enc); ++enc->indent;
		526
		527	while (count--)
427	{	528	{
428	encode_indent (enc);	529	encode_indent (enc);
		530	he = hes [count];
429	encode_he (enc, hes [i]);	531	encode_hk (enc, he);
		532	encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
430		533
431	if (i < count - 1)	534	if (count)
432	encode_comma (enc);	535	encode_comma (enc);
433	}	536	}
434		537
		538	encode_nl (enc); --enc->indent; encode_indent (enc);
		539	}
		540	}
		541	else
		542	{
		543	if (hv_iterinit (hv) || SvMAGICAL (hv))
		544	if ((he = hv_iternext (hv)))
		545	{
		546	encode_nl (enc); ++enc->indent;
		547
		548	for (;;)
		549	{
435	encode_nl (enc);	550	encode_indent (enc);
		551	encode_hk (enc, he);
		552	encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
		553
		554	if (!(he = hv_iternext (hv)))
		555	break;
		556
		557	encode_comma (enc);
		558	}
		559
		560	encode_nl (enc); --enc->indent; encode_indent (enc);
		561	}
		562	}
		563
		564	encode_ch (enc, '}');
		565	}
		566
		567	// encode objects, arrays and special \0=false and \1=true values.
		568	static void
		569	encode_rv (enc_t *enc, SV *sv)
		570	{
		571	svtype svt;
		572
		573	SvGETMAGIC (sv);
		574	svt = SvTYPE (sv);
		575
		576	if (expect_false (SvOBJECT (sv)))
		577	{
		578	HV *stash = !JSON_SLOW || json_boolean_stash
		579	? json_boolean_stash
		580	: gv_stashpv ("JSON::XS::Boolean", 1);
		581
		582	if (SvSTASH (sv) == stash)
		583	{
		584	if (SvIV (sv))
		585	encode_str (enc, "true", 4, 0);
		586	else
		587	encode_str (enc, "false", 5, 0);
436	}	588	}
437	else	589	else
438	{	590	{
439	HE *he = hv_iternext (hv);	591	#if 0
440		592	if (0 && sv_derived_from (rv, "JSON::Literal"))
441	for (;;)
442	{	593	{
443	encode_indent (enc);	594	// not yet
444	encode_he (enc, he);
445
446	if (!(he = hv_iternext (hv)))
447	break;
448
449	encode_comma (enc);
450	}	595	}
		596	#endif
		597	if (enc->json.flags & F_CONV_BLESSED)
		598	{
		599	// we re-bless the reference to get overload and other niceties right
		600	GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 0);
451		601
		602	if (to_json)
		603	{
		604	dSP;
		605
		606	ENTER; SAVETMPS; PUSHMARK (SP);
		607	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
		608
		609	// calling with G_SCALAR ensures that we always get a 1 return value
		610	PUTBACK;
		611	call_sv ((SV *)GvCV (to_json), G_SCALAR);
		612	SPAGAIN;
		613
		614	// catch this surprisingly common error
		615	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		616	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		617
		618	sv = POPs;
		619	PUTBACK;
		620
452	encode_nl (enc);	621	encode_sv (enc, sv);
		622
		623	FREETMPS; LEAVE;
		624	}
		625	else if (enc->json.flags & F_ALLOW_BLESSED)
		626	encode_str (enc, "null", 4, 0);
		627	else
		628	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
		629	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		630	}
		631	else if (enc->json.flags & F_ALLOW_BLESSED)
		632	encode_str (enc, "null", 4, 0);
		633	else
		634	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",
		635	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
453	}	636	}
454	}	637	}
455
456	--enc->indent; encode_indent (enc); encode_ch (enc, '}');
457	}
458
459	// encode objects, arrays and special \0=false and \1=true values.
460	static void
461	encode_rv (enc_t *enc, SV *sv)
462	{
463	svtype svt;
464
465	SvGETMAGIC (sv);
466	svt = SvTYPE (sv);
467
468	if (svt == SVt_PVHV)	638	else if (svt == SVt_PVHV)
469	encode_hv (enc, (HV *)sv);	639	encode_hv (enc, (HV *)sv);
470	else if (svt == SVt_PVAV)	640	else if (svt == SVt_PVAV)
471	encode_av (enc, (AV *)sv);	641	encode_av (enc, (AV *)sv);
472	else if (svt < SVt_PVAV)	642	else if (svt < SVt_PVAV)
473	{	643	{
474	if (SvNIOK (sv) && SvIV (sv) == 0)	644	STRLEN len = 0;
		645	char *pv = svt ? SvPV (sv, len) : 0;
		646
		647	if (len == 1 && *pv == '1')
		648	encode_str (enc, "true", 4, 0);
		649	else if (len == 1 && *pv == '0')
475	encode_str (enc, "false", 5, 0);	650	encode_str (enc, "false", 5, 0);
476	else if (SvNIOK (sv) && SvIV (sv) == 1)	651	else if (enc->json.flags & F_ALLOW_UNKNOWN)
477	encode_str (enc, "true", 4, 0);	652	encode_str (enc, "null", 4, 0);
478	else	653	else
479	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",	654	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
480	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	655	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
481	}	656	}
		657	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		658	encode_str (enc, "null", 4, 0);
482	else	659	else
483	croak ("encountered %s, but JSON can only represent references to arrays or hashes",	660	croak ("encountered %s, but JSON can only represent references to arrays or hashes",
484	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	661	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
485	}	662	}
486		663
…		…
497	encode_str (enc, str, len, SvUTF8 (sv));	674	encode_str (enc, str, len, SvUTF8 (sv));
498	encode_ch (enc, '"');	675	encode_ch (enc, '"');
499	}	676	}
500	else if (SvNOKp (sv))	677	else if (SvNOKp (sv))
501	{	678	{
		679	// trust that perl will do the right thing w.r.t. JSON syntax.
502	need (enc, NV_DIG + 32);	680	need (enc, NV_DIG + 32);
503	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);	681	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
504	enc->cur += strlen (enc->cur);	682	enc->cur += strlen (enc->cur);
505	}	683	}
506	else if (SvIOKp (sv))	684	else if (SvIOKp (sv))
507	{	685	{
508	// we assume we can always read an IV as a UV	686	// we assume we can always read an IV as a UV and vice versa
509	if (SvUV (sv) & ~(UV)0x7fff)	687	// we assume two's complement
		688	// we assume no aliasing issues in the union
		689	if (SvIsUV (sv) ? SvUVX (sv) <= 59000
		690	: SvIVX (sv) <= 59000 && SvIVX (sv) >= -59000)
510	{	691	{
511	need (enc, sizeof (UV) * 3);	692	// optimise the "small number case"
512	enc->cur +=	693	// code will likely be branchless and use only a single multiplication
513	SvIsUV(sv)	694	// works for numbers up to 59074
514	? snprintf (enc->cur, sizeof (UV) * 3, "%"UVuf, (UV)SvUVX (sv))	695	I32 i = SvIVX (sv);
515	: snprintf (enc->cur, sizeof (UV) * 3, "%"IVdf, (IV)SvIVX (sv));	696	U32 u;
		697	char digit, nz = 0;
		698
		699	need (enc, 6);
		700
		701	*enc->cur = '-'; enc->cur += i < 0 ? 1 : 0;
		702	u = i < 0 ? -i : i;
		703
		704	// convert to 4.28 fixed-point representation
		705	u = u * ((0xfffffff + 10000) / 10000); // 10**5, 5 fractional digits
		706
		707	// now output digit by digit, each time masking out the integer part
		708	// and multiplying by 5 while moving the decimal point one to the right,
		709	// resulting in a net multiplication by 10.
		710	// we always write the digit to memory but conditionally increment
		711	// the pointer, to enable the use of conditional move instructions.
		712	digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffffUL) * 5;
		713	digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffffUL) * 5;
		714	digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffffUL) * 5;
		715	digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffffUL) * 5;
		716	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
516	}	717	}
517	else	718	else
518	{	719	{
519	// optimise the "small number case"	720	// large integer, use the (rather slow) snprintf way.
520	// code will likely be branchless and use only a single multiplication
521	I32 i = SvIV (sv);
522	U32 u;
523
524	need (enc, 6);	721	need (enc, IVUV_MAXCHARS);
525		722	enc->cur +=
526	*enc->cur = '-'; enc->cur += i < 0 ? 1 : 0;	723	SvIsUV(sv)
527	u = i < 0 ? -i : i;	724	? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv))
528		725	: snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv));
529	// convert to 4.28 fixed-point representation
530	u = u * ((0xfffffff + 10000) / 10000); // 10**5, 5 fractional digits
531
532	char digit, nz = 0;
533
534	digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffff) * 5;
535	digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffff) * 5;
536	digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffff) * 5;
537	digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffff) * 5;
538	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1;
539	}	726	}
540	}	727	}
541	else if (SvROK (sv))	728	else if (SvROK (sv))
542	encode_rv (enc, SvRV (sv));	729	encode_rv (enc, SvRV (sv));
543	else if (!SvOK (sv))	730	else if (!SvOK (sv) || enc->json.flags & F_ALLOW_UNKNOWN)
544	encode_str (enc, "null", 4, 0);	731	encode_str (enc, "null", 4, 0);
545	else	732	else
546	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",	733	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",
547	SvPV_nolen (sv), SvFLAGS (sv));	734	SvPV_nolen (sv), SvFLAGS (sv));
548	}	735	}
549		736
550	static SV *	737	static SV *
551	encode_json (SV *scalar, U32 flags)	738	encode_json (SV *scalar, JSON *json)
552	{	739	{
553	enc_t enc;	740	enc_t enc;
554		741
555	if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar))	742	if (!(json->flags & F_ALLOW_NONREF) && !SvROK (scalar))
556	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");	743	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
557		744
558	enc.flags = flags;	745	enc.json = *json;
559	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	746	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
560	enc.cur = SvPVX (enc.sv);	747	enc.cur = SvPVX (enc.sv);
561	enc.end = SvEND (enc.sv);	748	enc.end = SvEND (enc.sv);
562	enc.indent = 0;	749	enc.indent = 0;
563	enc.maxdepth = DEC_DEPTH (flags);	750	enc.limit = enc.json.flags & F_ASCII ? 0x000080UL
		751	: enc.json.flags & F_LATIN1 ? 0x000100UL
		752	: 0x110000UL;
564		753
565	SvPOK_only (enc.sv);	754	SvPOK_only (enc.sv);
566	encode_sv (&enc, scalar);	755	encode_sv (&enc, scalar);
567		756
568	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	757	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
569	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	758	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
570		759
571	if (!(flags & (F_ASCII | F_LATIN1 | F_UTF8)))	760	if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8)))
572	SvUTF8_on (enc.sv);	761	SvUTF8_on (enc.sv);
573		762
574	if (enc.flags & F_SHRINK)	763	if (enc.json.flags & F_SHRINK)
575	shrink (enc.sv);	764	shrink (enc.sv);
576		765
577	return enc.sv;	766	return enc.sv;
578	}	767	}
579		768
…		…
584	typedef struct	773	typedef struct
585	{	774	{
586	char *cur; // current parser pointer	775	char *cur; // current parser pointer
587	char *end; // end of input string	776	char *end; // end of input string
588	const char *err; // parse error, if != 0	777	const char *err; // parse error, if != 0
589	U32 flags; // F_*	778	JSON json;
590	U32 depth; // recursion depth	779	U32 depth; // recursion depth
591	U32 maxdepth; // recursion depth limit	780	U32 maxdepth; // recursion depth limit
592	} dec_t;	781	} dec_t;
593		782
594	inline void	783	INLINE void
		784	decode_comment (dec_t *dec)
		785	{
		786	// only '#'-style comments allowed a.t.m.
		787
		788	while (*dec->cur && *dec->cur != 0x0a && *dec->cur != 0x0d)
		789	++dec->cur;
		790	}
		791
		792	INLINE void
595	decode_ws (dec_t *dec)	793	decode_ws (dec_t *dec)
596	{	794	{
597	for (;;)	795	for (;;)
598	{	796	{
599	char ch = *dec->cur;	797	char ch = *dec->cur;
600		798
601	if (ch > 0x20	799	if (ch > 0x20)
		800	{
		801	if (expect_false (ch == '#'))
		802	{
		803	if (dec->json.flags & F_RELAXED)
		804	decode_comment (dec);
		805	else
		806	break;
		807	}
		808	else
		809	break;
		810	}
602	|| (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09))	811	else if (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)
603	break;	812	break; // parse error, but let higher level handle it, gives better error messages
604		813
605	++dec->cur;	814	++dec->cur;
606	}	815	}
607	}	816	}
608		817
…		…
612	if (*dec->cur != ch) \	821	if (*dec->cur != ch) \
613	ERR (# ch " expected"); \	822	ERR (# ch " expected"); \
614	++dec->cur; \	823	++dec->cur; \
615	SE	824	SE
616		825
617	#define DEC_INC_DEPTH if (++dec->depth > dec->maxdepth) ERR ("json datastructure exceeds maximum nesting level (set a higher max_depth)")	826	#define DEC_INC_DEPTH if (++dec->depth > dec->json.max_depth) ERR (ERR_NESTING_EXCEEDED)
618	#define DEC_DEC_DEPTH --dec->depth	827	#define DEC_DEC_DEPTH --dec->depth
619		828
620	static SV *decode_sv (dec_t *dec);	829	static SV *decode_sv (dec_t *dec);
621		830
622	static signed char decode_hexdigit[256];	831	static signed char decode_hexdigit[256];
…		…
625	decode_4hex (dec_t *dec)	834	decode_4hex (dec_t *dec)
626	{	835	{
627	signed char d1, d2, d3, d4;	836	signed char d1, d2, d3, d4;
628	unsigned char *cur = (unsigned char *)dec->cur;	837	unsigned char *cur = (unsigned char *)dec->cur;
629		838
630	d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("four hexadecimal digits expected");	839	d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("exactly four hexadecimal digits expected");
631	d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("four hexadecimal digits expected");	840	d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("exactly four hexadecimal digits expected");
632	d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("four hexadecimal digits expected");	841	d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("exactly four hexadecimal digits expected");
633	d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("four hexadecimal digits expected");	842	d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("exactly four hexadecimal digits expected");
634		843
635	dec->cur += 4;	844	dec->cur += 4;
636		845
637	return ((UV)d1) << 12	846	return ((UV)d1) << 12
638	| ((UV)d2) << 8	847	| ((UV)d2) << 8
…		…
714		923
715	if (hi >= 0x80)	924	if (hi >= 0x80)
716	{	925	{
717	utf8 = 1;	926	utf8 = 1;
718		927
719	cur = (char *)uvuni_to_utf8_flags (cur, hi, 0);	928	cur = encode_utf8 (cur, hi);
720	}	929	}
721	else	930	else
722	*cur++ = hi;	931	*cur++ = hi;
723	}	932	}
724	break;	933	break;
…		…
726	default:	935	default:
727	--dec_cur;	936	--dec_cur;
728	ERR ("illegal backslash escape sequence in string");	937	ERR ("illegal backslash escape sequence in string");
729	}	938	}
730	}	939	}
731	else if (expect_true (ch >= 0x20 && ch <= 0x7f))	940	else if (expect_true (ch >= 0x20 && ch < 0x80))
732	*cur++ = ch;	941	*cur++ = ch;
733	else if (ch >= 0x80)	942	else if (ch >= 0x80)
734	{	943	{
735	STRLEN clen;	944	STRLEN clen;
736	UV uch;	945	UV uch;
…		…
857	is_nv = 1;	1066	is_nv = 1;
858	}	1067	}
859		1068
860	if (!is_nv)	1069	if (!is_nv)
861	{	1070	{
		1071	int len = dec->cur - start;
		1072
862	// special case the rather common 1..4-digit-int case, assumes 32 bit ints or so	1073	// special case the rather common 1..5-digit-int case
863	if (*start == '-')	1074	if (*start == '-')
864	switch (dec->cur - start)	1075	switch (len)
865	{	1076	{
866	case 2: return newSViv (-( start [1] - '0' ));	1077	case 2: return newSViv (-( start [1] - '0' * 1));
867	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));	1078	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));
868	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));	1079	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
869	case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));	1080	case 5: return newSViv (-( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
		1081	case 6: return newSViv (-(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));
870	}	1082	}
871	else	1083	else
872	switch (dec->cur - start)	1084	switch (len)
873	{	1085	{
874	case 1: return newSViv ( start [0] - '0' );	1086	case 1: return newSViv ( start [0] - '0' * 1);
875	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);	1087	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
876	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);	1088	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
877	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);	1089	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
		1090	case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);
878	}	1091	}
879		1092
880	{	1093	{
881	UV uv;	1094	UV uv;
882	int numtype = grok_number (start, dec->cur - start, &uv);	1095	int numtype = grok_number (start, len, &uv);
883	if (numtype & IS_NUMBER_IN_UV)	1096	if (numtype & IS_NUMBER_IN_UV)
884	if (numtype & IS_NUMBER_NEG)	1097	if (numtype & IS_NUMBER_NEG)
885	{	1098	{
886	if (uv < (UV)IV_MIN)	1099	if (uv < (UV)IV_MIN)
887	return newSViv (-(IV)uv);	1100	return newSViv (-(IV)uv);
888	}	1101	}
889	else	1102	else
890	return newSVuv (uv);	1103	return newSVuv (uv);
891	}	1104	}
892	}
893		1105
		1106	len -= *start == '-' ? 1 : 0;
		1107
		1108	// does not fit into IV or UV, try NV
		1109	if ((sizeof (NV) == sizeof (double) && DBL_DIG >= len)
		1110	#if defined (LDBL_DIG)
		1111	|| (sizeof (NV) == sizeof (long double) && LDBL_DIG >= len)
		1112	#endif
		1113	)
		1114	// fits into NV without loss of precision
		1115	return newSVnv (Atof (start));
		1116
		1117	// everything else fails, convert it to a string
		1118	return newSVpvn (start, dec->cur - start);
		1119	}
		1120
		1121	// loss of precision here
894	return newSVnv (Atof (start));	1122	return newSVnv (Atof (start));
895		1123
896	fail:	1124	fail:
897	return 0;	1125	return 0;
898	}	1126	}
…		…
928		1156
929	if (*dec->cur != ',')	1157	if (*dec->cur != ',')
930	ERR (", or ] expected while parsing array");	1158	ERR (", or ] expected while parsing array");
931		1159
932	++dec->cur;	1160	++dec->cur;
		1161
		1162	decode_ws (dec);
		1163
		1164	if (*dec->cur == ']' && dec->json.flags & F_RELAXED)
		1165	{
		1166	++dec->cur;
		1167	break;
		1168	}
933	}	1169	}
934		1170
935	DEC_DEC_DEPTH;	1171	DEC_DEC_DEPTH;
936	return newRV_noinc ((SV *)av);	1172	return newRV_noinc ((SV *)av);
937		1173
…		…
942	}	1178	}
943		1179
944	static SV *	1180	static SV *
945	decode_hv (dec_t *dec)	1181	decode_hv (dec_t *dec)
946	{	1182	{
		1183	SV *sv;
947	HV *hv = newHV ();	1184	HV *hv = newHV ();
948		1185
949	DEC_INC_DEPTH;	1186	DEC_INC_DEPTH;
950	decode_ws (dec);	1187	decode_ws (dec);
951		1188
952	if (*dec->cur == '}')	1189	if (*dec->cur == '}')
953	++dec->cur;	1190	++dec->cur;
954	else	1191	else
955	for (;;)	1192	for (;;)
956	{	1193	{
		1194	EXPECT_CH ('"');
		1195
		1196	// heuristic: assume that
		1197	// a) decode_str + hv_store_ent are abysmally slow.
		1198	// b) most hash keys are short, simple ascii text.
		1199	// => try to "fast-match" such strings to avoid
		1200	// the overhead of decode_str + hv_store_ent.
		1201	{
957	SV *key, *value;	1202	SV *value;
		1203	char *p = dec->cur;
		1204	char *e = p + 24; // only try up to 24 bytes
958		1205
959	decode_ws (dec); EXPECT_CH ('"');	1206	for (;;)
960
961	key = decode_str (dec);
962	if (!key)
963	goto fail;
964
965	decode_ws (dec); EXPECT_CH (':');
966
967	value = decode_sv (dec);
968	if (!value)
969	{	1207	{
		1208	// the >= 0x80 is false on most architectures
		1209	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
		1210	{
		1211	// slow path, back up and use decode_str
		1212	SV *key = decode_str (dec);
		1213	if (!key)
		1214	goto fail;
		1215
		1216	decode_ws (dec); EXPECT_CH (':');
		1217
		1218	decode_ws (dec);
		1219	value = decode_sv (dec);
		1220	if (!value)
		1221	{
		1222	SvREFCNT_dec (key);
		1223	goto fail;
		1224	}
		1225
		1226	hv_store_ent (hv, key, value, 0);
970	SvREFCNT_dec (key);	1227	SvREFCNT_dec (key);
		1228
		1229	break;
		1230	}
		1231	else if (*p == '"')
		1232	{
		1233	// fast path, got a simple key
		1234	char *key = dec->cur;
		1235	int len = p - key;
		1236	dec->cur = p + 1;
		1237
		1238	decode_ws (dec); EXPECT_CH (':');
		1239
		1240	decode_ws (dec);
		1241	value = decode_sv (dec);
		1242	if (!value)
971	goto fail;	1243	goto fail;
		1244
		1245	hv_store (hv, key, len, value, 0);
		1246
		1247	break;
		1248	}
		1249
		1250	++p;
972	}	1251	}
973		1252	}
974	hv_store_ent (hv, key, value, 0);
975	SvREFCNT_dec (key);
976		1253
977	decode_ws (dec);	1254	decode_ws (dec);
978		1255
979	if (*dec->cur == '}')	1256	if (*dec->cur == '}')
980	{	1257	{
…		…
984		1261
985	if (*dec->cur != ',')	1262	if (*dec->cur != ',')
986	ERR (", or } expected while parsing object/hash");	1263	ERR (", or } expected while parsing object/hash");
987		1264
988	++dec->cur;	1265	++dec->cur;
		1266
		1267	decode_ws (dec);
		1268
		1269	if (*dec->cur == '}' && dec->json.flags & F_RELAXED)
		1270	{
		1271	++dec->cur;
		1272	break;
		1273	}
989	}	1274	}
990		1275
991	DEC_DEC_DEPTH;	1276	DEC_DEC_DEPTH;
992	return newRV_noinc ((SV *)hv);	1277	sv = newRV_noinc ((SV *)hv);
		1278
		1279	// check filter callbacks
		1280	if (dec->json.flags & F_HOOK)
		1281	{
		1282	if (dec->json.cb_sk_object && HvKEYS (hv) == 1)
		1283	{
		1284	HE *cb, *he;
		1285
		1286	hv_iterinit (hv);
		1287	he = hv_iternext (hv);
		1288	hv_iterinit (hv);
		1289
		1290	// the next line creates a mortal sv each time its called.
		1291	// might want to optimise this for common cases.
		1292	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);
		1293
		1294	if (cb)
		1295	{
		1296	dSP;
		1297	int count;
		1298
		1299	ENTER; SAVETMPS; PUSHMARK (SP);
		1300	XPUSHs (HeVAL (he));
		1301
		1302	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
		1303
		1304	if (count == 1)
		1305	{
		1306	sv = newSVsv (POPs);
		1307	FREETMPS; LEAVE;
		1308	return sv;
		1309	}
		1310
		1311	FREETMPS; LEAVE;
		1312	}
		1313	}
		1314
		1315	if (dec->json.cb_object)
		1316	{
		1317	dSP;
		1318	int count;
		1319
		1320	ENTER; SAVETMPS; PUSHMARK (SP);
		1321	XPUSHs (sv_2mortal (sv));
		1322
		1323	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;
		1324
		1325	if (count == 1)
		1326	{
		1327	sv = newSVsv (POPs);
		1328	FREETMPS; LEAVE;
		1329	return sv;
		1330	}
		1331
		1332	SvREFCNT_inc (sv);
		1333	FREETMPS; LEAVE;
		1334	}
		1335	}
		1336
		1337	return sv;
993		1338
994	fail:	1339	fail:
995	SvREFCNT_dec (hv);	1340	SvREFCNT_dec (hv);
996	DEC_DEC_DEPTH;	1341	DEC_DEC_DEPTH;
997	return 0;	1342	return 0;
998	}	1343	}
999		1344
1000	static SV *	1345	static SV *
1001	decode_sv (dec_t *dec)	1346	decode_sv (dec_t *dec)
1002	{	1347	{
1003	decode_ws (dec);	1348	// the beauty of JSON: you need exactly one character lookahead
		1349	// to parse everything.
1004	switch (*dec->cur)	1350	switch (*dec->cur)
1005	{	1351	{
1006	case '"': ++dec->cur; return decode_str (dec);	1352	case '"': ++dec->cur; return decode_str (dec);
1007	case '[': ++dec->cur; return decode_av (dec);	1353	case '[': ++dec->cur; return decode_av (dec);
1008	case '{': ++dec->cur; return decode_hv (dec);	1354	case '{': ++dec->cur; return decode_hv (dec);
1009		1355
1010	case '-':	1356	case '-':
1011	case '0': case '1': case '2': case '3': case '4':	1357	case '0': case '1': case '2': case '3': case '4':
1012	case '5': case '6': case '7': case '8': case '9':	1358	case '5': case '6': case '7': case '8': case '9':
1013	return decode_num (dec);	1359	return decode_num (dec);
1014		1360
1015	case 't':	1361	case 't':
1016	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1362	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
1017	{	1363	{
1018	dec->cur += 4;	1364	dec->cur += 4;
		1365	#if JSON_SLOW
		1366	json_true = get_bool ("JSON::XS::true");
		1367	#endif
1019	return newSViv (1);	1368	return newSVsv (json_true);
1020	}	1369	}
1021	else	1370	else
1022	ERR ("'true' expected");	1371	ERR ("'true' expected");
1023		1372
1024	break;	1373	break;
1025		1374
1026	case 'f':	1375	case 'f':
1027	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))	1376	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
1028	{	1377	{
1029	dec->cur += 5;	1378	dec->cur += 5;
		1379	#if JSON_SLOW
		1380	json_false = get_bool ("JSON::XS::false");
		1381	#endif
1030	return newSViv (0);	1382	return newSVsv (json_false);
1031	}	1383	}
1032	else	1384	else
1033	ERR ("'false' expected");	1385	ERR ("'false' expected");
1034		1386
1035	break;	1387	break;
…		…
1053	fail:	1405	fail:
1054	return 0;	1406	return 0;
1055	}	1407	}
1056		1408
1057	static SV *	1409	static SV *
1058	decode_json (SV *string, U32 flags, UV *offset_return)	1410	decode_json (SV *string, JSON *json, STRLEN *offset_return)
1059	{	1411	{
1060	dec_t dec;	1412	dec_t dec;
1061	UV offset;	1413	STRLEN offset;
1062	SV *sv;	1414	SV *sv;
1063		1415
1064	SvGETMAGIC (string);	1416	SvGETMAGIC (string);
1065	SvUPGRADE (string, SVt_PV);	1417	SvUPGRADE (string, SVt_PV);
1066		1418
		1419	/* work around a bug in perl 5.10, which causes SvCUR to fail an
		1420	* assertion with -DDEBUGGING, although SvCUR is documented to
		1421	* return the xpv_cur field which certainly exists after upgrading.
		1422	* according to nicholas clark, calling SvPOK fixes this.
		1423	* But it doesn't fix it, so try another workaround, call SvPV_nolen
		1424	* and hope for the best.
		1425	* Damnit, SvPV_nolen still trips over yet another assertion. This
		1426	* assertion business is seriously broken, try yet another workaround
		1427	* for the broken -DDEBUGGING.
		1428	*/
		1429	#ifdef DEBUGGING
		1430	offset = SvOK (string) ? sv_len (string) : 0;
		1431	#else
		1432	offset = SvCUR (string);
		1433	#endif
		1434
		1435	if (offset > json->max_size && json->max_size)
		1436	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		1437	(unsigned long)SvCUR (string), (unsigned long)json->max_size);
		1438
1067	if (flags & F_UTF8)	1439	if (json->flags & F_UTF8)
1068	sv_utf8_downgrade (string, 0);	1440	sv_utf8_downgrade (string, 0);
1069	else	1441	else
1070	sv_utf8_upgrade (string);	1442	sv_utf8_upgrade (string);
1071		1443
1072	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1444	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
1073		1445
1074	dec.flags = flags;	1446	dec.json = *json;
1075	dec.cur = SvPVX (string);	1447	dec.cur = SvPVX (string);
1076	dec.end = SvEND (string);	1448	dec.end = SvEND (string);
1077	dec.err = 0;	1449	dec.err = 0;
1078	dec.depth = 0;	1450	dec.depth = 0;
1079	dec.maxdepth = DEC_DEPTH (dec.flags);	1451
		1452	if (dec.json.cb_object || dec.json.cb_sk_object)
		1453	dec.json.flags |= F_HOOK;
1080		1454
1081	*dec.end = 0; // this should basically be a nop, too, but make sure it's there	1455	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
		1456
		1457	decode_ws (&dec);
1082	sv = decode_sv (&dec);	1458	sv = decode_sv (&dec);
1083		1459
1084	if (!(offset_return || !sv))	1460	if (!(offset_return || !sv))
1085	{	1461	{
1086	// check for trailing garbage	1462	// check for trailing garbage
…		…
1094	}	1470	}
1095	}	1471	}
1096		1472
1097	if (offset_return || !sv)	1473	if (offset_return || !sv)
1098	{	1474	{
1099	offset = dec.flags & F_UTF8	1475	offset = dec.json.flags & F_UTF8
1100	? dec.cur - SvPVX (string)	1476	? dec.cur - SvPVX (string)
1101	: utf8_distance (dec.cur, SvPVX (string));	1477	: utf8_distance (dec.cur, SvPVX (string));
1102		1478
1103	if (offset_return)	1479	if (offset_return)
1104	*offset_return = offset;	1480	*offset_return = offset;
…		…
1123	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1499	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
1124	}	1500	}
1125		1501
1126	sv = sv_2mortal (sv);	1502	sv = sv_2mortal (sv);
1127		1503
1128	if (!(dec.flags & F_ALLOW_NONREF) && !SvROK (sv))	1504	if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))
1129	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");	1505	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
1130		1506
1131	return sv;	1507	return sv;
		1508	}
		1509
		1510	/////////////////////////////////////////////////////////////////////////////
		1511	// incremental parser
		1512
		1513	static void
		1514	incr_parse (JSON *self)
		1515	{
		1516	const char *p = SvPVX (self->incr_text) + self->incr_pos;
		1517
		1518	for (;;)
		1519	{
		1520	//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
		1521	switch (self->incr_mode)
		1522	{
		1523	// only used for intiial whitespace skipping
		1524	case INCR_M_WS:
		1525	for (;;)
		1526	{
		1527	if (*p > 0x20)
		1528	{
		1529	self->incr_mode = INCR_M_JSON;
		1530	goto incr_m_json;
		1531	}
		1532	else if (!*p)
		1533	goto interrupt;
		1534
		1535	++p;
		1536	}
		1537
		1538	// skip a single char inside a string (for \\-processing)
		1539	case INCR_M_BS:
		1540	if (!*p)
		1541	goto interrupt;
		1542
		1543	++p;
		1544	self->incr_mode = INCR_M_STR;
		1545	goto incr_m_str;
		1546
		1547	// inside a string
		1548	case INCR_M_STR:
		1549	incr_m_str:
		1550	for (;;)
		1551	{
		1552	if (*p == '"')
		1553	{
		1554	++p;
		1555	self->incr_mode = INCR_M_JSON;
		1556
		1557	if (!self->incr_nest)
		1558	goto interrupt;
		1559
		1560	goto incr_m_json;
		1561	}
		1562	else if (*p == '\\')
		1563	{
		1564	++p; // "virtually" consumes character after \
		1565
		1566	if (!*p) // if at end of string we have to switch modes
		1567	{
		1568	self->incr_mode = INCR_M_BS;
		1569	goto interrupt;
		1570	}
		1571	}
		1572	else if (!*p)
		1573	goto interrupt;
		1574
		1575	++p;
		1576	}
		1577
		1578	// after initial ws, outside string
		1579	case INCR_M_JSON:
		1580	incr_m_json:
		1581	for (;;)
		1582	{
		1583	switch (*p++)
		1584	{
		1585	case 0:
		1586	--p;
		1587	goto interrupt;
		1588
		1589	case 0x09:
		1590	case 0x0a:
		1591	case 0x0d:
		1592	case 0x20:
		1593	if (!self->incr_nest)
		1594	{
		1595	--p; // do not eat the whitespace, let the next round do it
		1596	goto interrupt;
		1597	}
		1598	break;
		1599
		1600	case '"':
		1601	self->incr_mode = INCR_M_STR;
		1602	goto incr_m_str;
		1603
		1604	case '[':
		1605	case '{':
		1606	if (++self->incr_nest > self->max_depth)
		1607	croak (ERR_NESTING_EXCEEDED);
		1608	break;
		1609
		1610	case ']':
		1611	case '}':
		1612	if (--self->incr_nest <= 0)
		1613	goto interrupt;
		1614	}
		1615	}
		1616	}
		1617
		1618	modechange:
		1619	;
		1620	}
		1621
		1622	interrupt:
		1623	self->incr_pos = p - SvPVX (self->incr_text);
		1624	//printf ("return pos %d mode %d nest %d\n", self->incr_pos, self->incr_mode, self->incr_nest);//D
1132	}	1625	}
1133		1626
1134	/////////////////////////////////////////////////////////////////////////////	1627	/////////////////////////////////////////////////////////////////////////////
1135	// XS interface functions	1628	// XS interface functions
1136		1629
1137	MODULE = JSON::XS PACKAGE = JSON::XS	1630	MODULE = JSON::XS PACKAGE = JSON::XS
1138		1631
1139	BOOT:	1632	BOOT:
1140	{	1633	{
1141	int i;	1634	int i;
1142
1143	memset (decode_hexdigit, 0xff, 256);
1144		1635
1145	for (i = 0; i < 256; ++i)	1636	for (i = 0; i < 256; ++i)
1146	decode_hexdigit [i] =	1637	decode_hexdigit [i] =
1147	i >= '0' && i <= '9' ? i - '0'	1638	i >= '0' && i <= '9' ? i - '0'
1148	: i >= 'a' && i <= 'f' ? i - 'a' + 10	1639	: i >= 'a' && i <= 'f' ? i - 'a' + 10
1149	: i >= 'A' && i <= 'F' ? i - 'A' + 10	1640	: i >= 'A' && i <= 'F' ? i - 'A' + 10
1150	: -1;	1641	: -1;
1151		1642
1152	json_stash = gv_stashpv ("JSON::XS", 1);	1643	json_stash = gv_stashpv ("JSON::XS" , 1);
		1644	json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);
		1645
		1646	json_true = get_bool ("JSON::XS::true");
		1647	json_false = get_bool ("JSON::XS::false");
1153	}	1648	}
1154		1649
1155	PROTOTYPES: DISABLE	1650	PROTOTYPES: DISABLE
1156		1651
1157	SV *new (char *dummy)	1652	void CLONE (...)
1158	CODE:	1653	CODE:
1159	RETVAL = sv_bless (newRV_noinc (newSVuv (F_DEFAULT)), json_stash);	1654	json_stash = 0;
		1655	json_boolean_stash = 0;
		1656
		1657	void new (char *klass)
		1658	PPCODE:
		1659	{
		1660	SV *pv = NEWSV (0, sizeof (JSON));
		1661	SvPOK_only (pv);
		1662	json_init ((JSON *)SvPVX (pv));
		1663	XPUSHs (sv_2mortal (sv_bless (
		1664	newRV_noinc (pv),
		1665	strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)
		1666	)));
		1667	}
		1668
		1669	void ascii (JSON *self, int enable = 1)
		1670	ALIAS:
		1671	ascii = F_ASCII
		1672	latin1 = F_LATIN1
		1673	utf8 = F_UTF8
		1674	indent = F_INDENT
		1675	canonical = F_CANONICAL
		1676	space_before = F_SPACE_BEFORE
		1677	space_after = F_SPACE_AFTER
		1678	pretty = F_PRETTY
		1679	allow_nonref = F_ALLOW_NONREF
		1680	shrink = F_SHRINK
		1681	allow_blessed = F_ALLOW_BLESSED
		1682	convert_blessed = F_CONV_BLESSED
		1683	relaxed = F_RELAXED
		1684	allow_unknown = F_ALLOW_UNKNOWN
		1685	PPCODE:
		1686	{
		1687	if (enable)
		1688	self->flags |= ix;
		1689	else
		1690	self->flags &= ~ix;
		1691
		1692	XPUSHs (ST (0));
		1693	}
		1694
		1695	void get_ascii (JSON *self)
		1696	ALIAS:
		1697	get_ascii = F_ASCII
		1698	get_latin1 = F_LATIN1
		1699	get_utf8 = F_UTF8
		1700	get_indent = F_INDENT
		1701	get_canonical = F_CANONICAL
		1702	get_space_before = F_SPACE_BEFORE
		1703	get_space_after = F_SPACE_AFTER
		1704	get_allow_nonref = F_ALLOW_NONREF
		1705	get_shrink = F_SHRINK
		1706	get_allow_blessed = F_ALLOW_BLESSED
		1707	get_convert_blessed = F_CONV_BLESSED
		1708	get_relaxed = F_RELAXED
		1709	get_allow_unknown = F_ALLOW_UNKNOWN
		1710	PPCODE:
		1711	XPUSHs (boolSV (self->flags & ix));
		1712
		1713	void max_depth (JSON *self, U32 max_depth = 0x80000000UL)
		1714	PPCODE:
		1715	self->max_depth = max_depth;
		1716	XPUSHs (ST (0));
		1717
		1718	U32 get_max_depth (JSON *self)
		1719	CODE:
		1720	RETVAL = self->max_depth;
1160	OUTPUT:	1721	OUTPUT:
1161	RETVAL	1722	RETVAL
1162		1723
1163	SV *ascii (SV *self, int enable = 1)	1724	void max_size (JSON *self, U32 max_size = 0)
1164	ALIAS:	1725	PPCODE:
1165	ascii = F_ASCII	1726	self->max_size = max_size;
1166	latin1 = F_LATIN1	1727	XPUSHs (ST (0));
1167	utf8 = F_UTF8	1728
1168	indent = F_INDENT	1729	int get_max_size (JSON *self)
1169	canonical = F_CANONICAL
1170	space_before = F_SPACE_BEFORE
1171	space_after = F_SPACE_AFTER
1172	pretty = F_PRETTY
1173	allow_nonref = F_ALLOW_NONREF
1174	shrink = F_SHRINK
1175	CODE:	1730	CODE:
1176	{	1731	RETVAL = self->max_size;
1177	UV *uv = SvJSON (self);
1178	if (enable)
1179	*uv |= ix;
1180	else
1181	*uv &= ~ix;
1182
1183	RETVAL = newSVsv (self);
1184	}
1185	OUTPUT:	1732	OUTPUT:
1186	RETVAL	1733	RETVAL
1187		1734
1188	SV *max_depth (SV *self, UV max_depth = 0x80000000UL)	1735	void filter_json_object (JSON *self, SV *cb = &PL_sv_undef)
		1736	PPCODE:
		1737	{
		1738	SvREFCNT_dec (self->cb_object);
		1739	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;
		1740
		1741	XPUSHs (ST (0));
		1742	}
		1743
		1744	void filter_json_single_key_object (JSON *self, SV *key, SV *cb = &PL_sv_undef)
		1745	PPCODE:
		1746	{
		1747	if (!self->cb_sk_object)
		1748	self->cb_sk_object = newHV ();
		1749
		1750	if (SvOK (cb))
		1751	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
		1752	else
		1753	{
		1754	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
		1755
		1756	if (!HvKEYS (self->cb_sk_object))
		1757	{
		1758	SvREFCNT_dec (self->cb_sk_object);
		1759	self->cb_sk_object = 0;
		1760	}
		1761	}
		1762
		1763	XPUSHs (ST (0));
		1764	}
		1765
		1766	void encode (JSON *self, SV *scalar)
		1767	PPCODE:
		1768	XPUSHs (encode_json (scalar, self));
		1769
		1770	void decode (JSON *self, SV *jsonstr)
		1771	PPCODE:
		1772	XPUSHs (decode_json (jsonstr, self, 0));
		1773
		1774	void decode_prefix (JSON *self, SV *jsonstr)
		1775	PPCODE:
		1776	{
		1777	STRLEN offset;
		1778	EXTEND (SP, 2);
		1779	PUSHs (decode_json (jsonstr, self, &offset));
		1780	PUSHs (sv_2mortal (newSVuv (offset)));
		1781	}
		1782
		1783	void incr_parse (JSON *self, SV *jsonstr = 0)
		1784	PPCODE:
		1785	{
		1786	if (!self->incr_text)
		1787	self->incr_text = newSVpvn ("", 0);
		1788
		1789	// append data, if any
		1790	if (jsonstr)
		1791	{
		1792	if (SvUTF8 (jsonstr) && !SvUTF8 (self->incr_text))
		1793	{
		1794	/* utf-8-ness differs, need to upgrade */
		1795	sv_utf8_upgrade (self->incr_text);
		1796
		1797	if (self->incr_pos)
		1798	self->incr_pos = utf8_hop ((U8 *)SvPVX (self->incr_text), self->incr_pos)
		1799	- (U8 *)SvPVX (self->incr_text);
		1800	}
		1801
		1802	{
		1803	STRLEN len;
		1804	const char *str = SvPV (jsonstr, len);
		1805	SvGROW (self->incr_text, SvCUR (self->incr_text) + len + 1);
		1806	Move (str, SvEND (self->incr_text), len, char);
		1807	SvCUR_set (self->incr_text, SvCUR (self->incr_text) + len);
		1808	*SvEND (self->incr_text) = 0; // this should basically be a nop, too, but make sure it's there
		1809	}
		1810	}
		1811
		1812	if (GIMME_V != G_VOID)
		1813	do
		1814	{
		1815	STRLEN offset;
		1816
		1817	if (!INCR_DONE (self))
		1818	{
		1819	incr_parse (self);
		1820
		1821	if (self->incr_pos > self->max_size && self->max_size)
		1822	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		1823	(unsigned long)self->incr_pos, (unsigned long)self->max_size);
		1824
		1825	if (!INCR_DONE (self))
		1826	break;
		1827	}
		1828
		1829	XPUSHs (decode_json (self->incr_text, self, &offset));
		1830
		1831	sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + offset);
		1832	self->incr_pos -= offset;
		1833	self->incr_nest = 0;
		1834	self->incr_mode = 0;
		1835	}
		1836	while (GIMME_V == G_ARRAY);
		1837	}
		1838
		1839	SV *incr_text (JSON *self)
		1840	ATTRS: lvalue
1189	CODE:	1841	CODE:
1190	{	1842	{
1191	UV *uv = SvJSON (self);	1843	if (self->incr_pos)
1192	UV log2 = 0;	1844	croak ("incr_text can not be called when the incremental parser already started parsing");
1193		1845
1194	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;	1846	RETVAL = self->incr_text ? SvREFCNT_inc (self->incr_text) : &PL_sv_undef;
1195
1196	while ((1UL << log2) < max_depth)
1197	++log2;
1198
1199	*uv = *uv & ~F_MAXDEPTH | (log2 << S_MAXDEPTH);
1200
1201	RETVAL = newSVsv (self);
1202	}	1847	}
1203	OUTPUT:	1848	OUTPUT:
1204	RETVAL	1849	RETVAL
1205		1850
		1851	void incr_skip (JSON *self)
		1852	CODE:
		1853	{
		1854	if (self->incr_pos)
		1855	{
		1856	sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + self->incr_pos);
		1857	self->incr_pos = 0;
		1858	self->incr_nest = 0;
		1859	self->incr_mode = 0;
		1860	}
		1861	}
		1862
		1863	void incr_reset (JSON *self)
		1864	CODE:
		1865	{
		1866	SvREFCNT_dec (self->incr_text);
		1867	self->incr_text = 0;
		1868	self->incr_pos = 0;
		1869	self->incr_nest = 0;
		1870	self->incr_mode = 0;
		1871	}
		1872
		1873	void DESTROY (JSON *self)
		1874	CODE:
		1875	SvREFCNT_dec (self->cb_sk_object);
		1876	SvREFCNT_dec (self->cb_object);
		1877	SvREFCNT_dec (self->incr_text);
		1878
		1879	PROTOTYPES: ENABLE
		1880
1206	void encode (SV *self, SV *scalar)	1881	void encode_json (SV *scalar)
		1882	ALIAS:
		1883	to_json_ = 0
		1884	encode_json = F_UTF8
1207	PPCODE:	1885	PPCODE:
		1886	{
		1887	JSON json;
		1888	json_init (&json);
		1889	json.flags |= ix;
1208	XPUSHs (encode_json (scalar, *SvJSON (self)));	1890	XPUSHs (encode_json (scalar, &json));
		1891	}
1209		1892
1210	void decode (SV *self, SV *jsonstr)	1893	void decode_json (SV *jsonstr)
		1894	ALIAS:
		1895	from_json_ = 0
		1896	decode_json = F_UTF8
1211	PPCODE:	1897	PPCODE:
		1898	{
		1899	JSON json;
		1900	json_init (&json);
		1901	json.flags |= ix;
1212	XPUSHs (decode_json (jsonstr, *SvJSON (self), 0));	1902	XPUSHs (decode_json (jsonstr, &json, 0));
1213
1214	void decode_prefix (SV *self, SV *jsonstr)
1215	PPCODE:
1216	{
1217	UV offset;
1218	EXTEND (SP, 2);
1219	PUSHs (decode_json (jsonstr, *SvJSON (self), &offset));
1220	PUSHs (sv_2mortal (newSVuv (offset)));
1221	}	1903	}
1222		1904
1223	PROTOTYPES: ENABLE
1224		1905
1225	void to_json (SV *scalar)
1226	ALIAS:
1227	objToJson = 0
1228	PPCODE:
1229	XPUSHs (encode_json (scalar, F_DEFAULT | F_UTF8));
1230
1231	void from_json (SV *jsonstr)
1232	ALIAS:
1233	jsonToObj = 0
1234	PPCODE:
1235	XPUSHs (decode_json (jsonstr, F_DEFAULT | F_UTF8, 0));
1236

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