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Comparing JSON-XS/XS.xs (file contents):
Revision 1.26 by root, Fri Apr 6 21:17:09 2007 UTC vs.
Revision 1.80 by root, Wed Mar 26 01:32:53 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
		25	#define F_LATIN1 0x00000002UL
15	#define F_UTF8 0x00000002UL	26	#define F_UTF8 0x00000004UL
16	#define F_INDENT 0x00000004UL	27	#define F_INDENT 0x00000008UL
17	#define F_CANONICAL 0x00000008UL	28	#define F_CANONICAL 0x00000010UL
18	#define F_SPACE_BEFORE 0x00000010UL	29	#define F_SPACE_BEFORE 0x00000020UL
19	#define F_SPACE_AFTER 0x00000020UL	30	#define F_SPACE_AFTER 0x00000040UL
20	#define F_ALLOW_NONREF 0x00000080UL	31	#define F_ALLOW_NONREF 0x00000100UL
21	#define F_SHRINK 0x00000100UL	32	#define F_SHRINK 0x00000200UL
		33	#define F_ALLOW_BLESSED 0x00000400UL
		34	#define F_CONV_BLESSED 0x00000800UL
		35	#define F_RELAXED 0x00001000UL
		36
22	#define F_MAXDEPTH 0xf8000000UL	37	#define F_MAXDEPTH 0xf8000000UL
23	#define S_MAXDEPTH 27	38	#define S_MAXDEPTH 27
		39	#define F_MAXSIZE 0x01f00000UL
		40	#define S_MAXSIZE 20
		41	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
24		42
25	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))	43	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
26		44	#define DEC_SIZE(flags) (1UL << ((flags & F_MAXSIZE ) >> S_MAXSIZE ))
27	// F_SELFCONVERT? <=> to_json/toJson
28	// F_BLESSED? <=> { $__class__$ => }
29		45
30	#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER	46	#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER
31	#define F_DEFAULT (9UL << S_MAXDEPTH)	47	#define F_DEFAULT (9UL << S_MAXDEPTH)
32		48
33	#define INIT_SIZE 32 // initial scalar size to be allocated	49	#define INIT_SIZE 32 // initial scalar size to be allocated
34	#define INDENT_STEP 3 // spaces per indentation level	50	#define INDENT_STEP 3 // spaces per indentation level
35		51
36	#define UTF8_MAX_LEN 11 // for perls UTF-X: max. number of octets per character
37	#define SHORT_STRING_LEN 512 // special-case strings of up to this size	52	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size
38		53
39	#define SB do {	54	#define SB do {
40	#define SE } while (0)	55	#define SE } while (0)
41		56
		57	#if __GNUC__ >= 3
		58	# define expect(expr,value) __builtin_expect ((expr), (value))
		59	# define INLINE static inline
		60	#else
		61	# define expect(expr,value) (expr)
		62	# define INLINE static
		63	#endif
		64
		65	#define expect_false(expr) expect ((expr) != 0, 0)
		66	#define expect_true(expr) expect ((expr) != 0, 1)
		67
		68	#define IN_RANGE_INC(type,val,beg,end) \
		69	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
		70	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
		71
		72	#ifdef USE_ITHREADS
		73	# define JSON_SLOW 1
		74	# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1))
		75	#else
		76	# define JSON_SLOW 0
		77	# define JSON_STASH json_stash
		78	#endif
		79
42	static HV *json_stash; // JSON::XS::	80	static HV *json_stash, *json_boolean_stash; // JSON::XS::
		81	static SV *json_true, *json_false;
		82
		83	enum {
		84	INCR_M_WS = 0, // initial whitespace skipping, must be 0
		85	INCR_M_STR, // inside string
		86	INCR_M_BS, // inside backslash
		87	INCR_M_JSON // outside anything, count nesting
		88	};
		89
		90	#define INCR_DONE(json) (!(json)->incr_nest && (json)->incr_mode == INCR_M_JSON)
		91
		92	typedef struct {
		93	U32 flags;
		94	SV *cb_object;
		95	HV *cb_sk_object;
		96
		97	// for the incremental parser
		98	SV *incr_text; // the source text so far
		99	STRLEN incr_pos; // the current offset into the text
		100	int incr_nest; // {[]}-nesting level
		101	int incr_mode;
		102	} JSON;
43		103
44	/////////////////////////////////////////////////////////////////////////////	104	/////////////////////////////////////////////////////////////////////////////
45	// utility functions	105	// utility functions
46		106
47	static UV *	107	INLINE void
48	SvJSON (SV *sv)
49	{
50	if (!(SvROK (sv) && SvOBJECT (SvRV (sv)) && SvSTASH (SvRV (sv)) == json_stash))
51	croak ("object is not of type JSON::XS");
52
53	return &SvUVX (SvRV (sv));
54	}
55
56	static void
57	shrink (SV *sv)	108	shrink (SV *sv)
58	{	109	{
59	sv_utf8_downgrade (sv, 1);	110	sv_utf8_downgrade (sv, 1);
60	if (SvLEN (sv) > SvCUR (sv) + 1)	111	if (SvLEN (sv) > SvCUR (sv) + 1)
61	{	112	{
…		…
70	// decode an utf-8 character and return it, or (UV)-1 in	121	// decode an utf-8 character and return it, or (UV)-1 in
71	// case of an error.	122	// case of an error.
72	// we special-case "safe" characters from U+80 .. U+7FF,	123	// we special-case "safe" characters from U+80 .. U+7FF,
73	// but use the very good perl function to parse anything else.	124	// but use the very good perl function to parse anything else.
74	// note that we never call this function for a ascii codepoints	125	// note that we never call this function for a ascii codepoints
75	static UV	126	INLINE UV
76	decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)	127	decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)
77	{	128	{
78	if (s[0] > 0xdf || s[0] < 0xc2)	129	if (expect_true (len >= 2
79	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);	130	&& IN_RANGE_INC (char, s[0], 0xc2, 0xdf)
80	else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf)	131	&& IN_RANGE_INC (char, s[1], 0x80, 0xbf)))
81	{	132	{
82	*clen = 2;	133	*clen = 2;
83	return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);	134	return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);
84	}	135	}
85	else	136	else
86	{	137	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);
87	*clen = (STRLEN)-1;	138	}
88	return (UV)-1;	139
89	}	140	// likewise for encoding, also never called for ascii codepoints
		141	// this function takes advantage of this fact, although current gccs
		142	// seem to optimise the check for >= 0x80 away anyways
		143	INLINE unsigned char *
		144	encode_utf8 (unsigned char *s, UV ch)
		145	{
		146	if (expect_false (ch < 0x000080))
		147	*s++ = ch;
		148	else if (expect_true (ch < 0x000800))
		149	*s++ = 0xc0 | ( ch >> 6),
		150	*s++ = 0x80 | ( ch & 0x3f);
		151	else if ( ch < 0x010000)
		152	*s++ = 0xe0 | ( ch >> 12),
		153	*s++ = 0x80 | ((ch >> 6) & 0x3f),
		154	*s++ = 0x80 | ( ch & 0x3f);
		155	else if ( ch < 0x110000)
		156	*s++ = 0xf0 | ( ch >> 18),
		157	*s++ = 0x80 | ((ch >> 12) & 0x3f),
		158	*s++ = 0x80 | ((ch >> 6) & 0x3f),
		159	*s++ = 0x80 | ( ch & 0x3f);
		160
		161	return s;
90	}	162	}
91		163
92	/////////////////////////////////////////////////////////////////////////////	164	/////////////////////////////////////////////////////////////////////////////
93	// encoder	165	// encoder
94		166
…		…
96	typedef struct	168	typedef struct
97	{	169	{
98	char *cur; // SvPVX (sv) + current output position	170	char *cur; // SvPVX (sv) + current output position
99	char *end; // SvEND (sv)	171	char *end; // SvEND (sv)
100	SV *sv; // result scalar	172	SV *sv; // result scalar
101	U32 flags; // F_*	173	JSON json;
102	U32 indent; // indentation level	174	U32 indent; // indentation level
103	U32 maxdepth; // max. indentation/recursion level	175	U32 maxdepth; // max. indentation/recursion level
		176	UV limit; // escape character values >= this value when encoding
104	} enc_t;	177	} enc_t;
105		178
106	static void	179	INLINE void
107	need (enc_t *enc, STRLEN len)	180	need (enc_t *enc, STRLEN len)
108	{	181	{
109	if (enc->cur + len >= enc->end)	182	if (expect_false (enc->cur + len >= enc->end))
110	{	183	{
111	STRLEN cur = enc->cur - SvPVX (enc->sv);	184	STRLEN cur = enc->cur - SvPVX (enc->sv);
112	SvGROW (enc->sv, cur + len + 1);	185	SvGROW (enc->sv, cur + len + 1);
113	enc->cur = SvPVX (enc->sv) + cur;	186	enc->cur = SvPVX (enc->sv) + cur;
114	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv);	187	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
115	}	188	}
116	}	189	}
117		190
118	static void	191	INLINE void
119	encode_ch (enc_t *enc, char ch)	192	encode_ch (enc_t *enc, char ch)
120	{	193	{
121	need (enc, 1);	194	need (enc, 1);
122	*enc->cur++ = ch;	195	*enc->cur++ = ch;
123	}	196	}
…		…
131		204
132	while (str < end)	205	while (str < end)
133	{	206	{
134	unsigned char ch = *(unsigned char *)str;	207	unsigned char ch = *(unsigned char *)str;
135		208
136	if (ch >= 0x20 && ch < 0x80) // most common case	209	if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case
137	{	210	{
138	if (ch == '"') // but with slow exceptions	211	if (expect_false (ch == '"')) // but with slow exceptions
139	{	212	{
140	need (enc, len += 1);	213	need (enc, len += 1);
141	*enc->cur++ = '\\';	214	*enc->cur++ = '\\';
142	*enc->cur++ = '"';	215	*enc->cur++ = '"';
143	}	216	}
144	else if (ch == '\\')	217	else if (expect_false (ch == '\\'))
145	{	218	{
146	need (enc, len += 1);	219	need (enc, len += 1);
147	*enc->cur++ = '\\';	220	*enc->cur++ = '\\';
148	*enc->cur++ = '\\';	221	*enc->cur++ = '\\';
149	}	222	}
…		…
167	STRLEN clen;	240	STRLEN clen;
168	UV uch;	241	UV uch;
169		242
170	if (is_utf8)	243	if (is_utf8)
171	{	244	{
172	//uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY);
173	uch = decode_utf8 (str, end - str, &clen);	245	uch = decode_utf8 (str, end - str, &clen);
174	if (clen == (STRLEN)-1)	246	if (clen == (STRLEN)-1)
175	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);	247	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);
176	}	248	}
177	else	249	else
178	{	250	{
179	uch = ch;	251	uch = ch;
180	clen = 1;	252	clen = 1;
181	}	253	}
182		254
183	if (uch > 0x10FFFFUL)	255	if (uch < 0x80/*0x20*/ || uch >= enc->limit)
184	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
185
186	if (uch < 0x80 || enc->flags & F_ASCII)
187	{	256	{
188	if (uch > 0xFFFFUL)	257	if (uch >= 0x10000UL)
189	{	258	{
		259	if (uch >= 0x110000UL)
		260	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
		261
190	need (enc, len += 11);	262	need (enc, len += 11);
191	sprintf (enc->cur, "\\u%04x\\u%04x",	263	sprintf (enc->cur, "\\u%04x\\u%04x",
192	(int)((uch - 0x10000) / 0x400 + 0xD800),	264	(int)((uch - 0x10000) / 0x400 + 0xD800),
193	(int)((uch - 0x10000) % 0x400 + 0xDC00));	265	(int)((uch - 0x10000) % 0x400 + 0xDC00));
194	enc->cur += 12;	266	enc->cur += 12;
…		…
205	*enc->cur++ = hexdigit [(uch >> 0) & 15];	277	*enc->cur++ = hexdigit [(uch >> 0) & 15];
206	}	278	}
207		279
208	str += clen;	280	str += clen;
209	}	281	}
		282	else if (enc->json.flags & F_LATIN1)
		283	{
		284	*enc->cur++ = uch;
		285	str += clen;
		286	}
210	else if (is_utf8)	287	else if (is_utf8)
211	{	288	{
212	need (enc, len += clen);	289	need (enc, len += clen);
213	do	290	do
214	{	291	{
…		…
216	}	293	}
217	while (--clen);	294	while (--clen);
218	}	295	}
219	else	296	else
220	{	297	{
221	need (enc, len += UTF8_MAX_LEN - 1); // never more than 11 bytes needed	298	need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed
222	enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0);	299	enc->cur = encode_utf8 (enc->cur, uch);
223	++str;	300	++str;
224	}	301	}
225	}	302	}
226	}	303	}
227	}	304	}
228		305
229	--len;	306	--len;
230	}	307	}
231	}	308	}
232		309
233	static void	310	INLINE void
234	encode_indent (enc_t *enc)	311	encode_indent (enc_t *enc)
235	{	312	{
236	if (enc->flags & F_INDENT)	313	if (enc->json.flags & F_INDENT)
237	{	314	{
238	int spaces = enc->indent * INDENT_STEP;	315	int spaces = enc->indent * INDENT_STEP;
239		316
240	need (enc, spaces);	317	need (enc, spaces);
241	memset (enc->cur, ' ', spaces);	318	memset (enc->cur, ' ', spaces);
242	enc->cur += spaces;	319	enc->cur += spaces;
243	}	320	}
244	}	321	}
245		322
246	static void	323	INLINE void
247	encode_space (enc_t *enc)	324	encode_space (enc_t *enc)
248	{	325	{
249	need (enc, 1);	326	need (enc, 1);
250	encode_ch (enc, ' ');	327	encode_ch (enc, ' ');
251	}	328	}
252		329
253	static void	330	INLINE void
254	encode_nl (enc_t *enc)	331	encode_nl (enc_t *enc)
255	{	332	{
256	if (enc->flags & F_INDENT)	333	if (enc->json.flags & F_INDENT)
257	{	334	{
258	need (enc, 1);	335	need (enc, 1);
259	encode_ch (enc, '\n');	336	encode_ch (enc, '\n');
260	}	337	}
261	}	338	}
262		339
263	static void	340	INLINE void
264	encode_comma (enc_t *enc)	341	encode_comma (enc_t *enc)
265	{	342	{
266	encode_ch (enc, ',');	343	encode_ch (enc, ',');
267		344
268	if (enc->flags & F_INDENT)	345	if (enc->json.flags & F_INDENT)
269	encode_nl (enc);	346	encode_nl (enc);
270	else if (enc->flags & F_SPACE_AFTER)	347	else if (enc->json.flags & F_SPACE_AFTER)
271	encode_space (enc);	348	encode_space (enc);
272	}	349	}
273		350
274	static void encode_sv (enc_t *enc, SV *sv);	351	static void encode_sv (enc_t *enc, SV *sv);
275		352
…		…
279	int i, len = av_len (av);	356	int i, len = av_len (av);
280		357
281	if (enc->indent >= enc->maxdepth)	358	if (enc->indent >= enc->maxdepth)
282	croak ("data structure too deep (hit recursion limit)");	359	croak ("data structure too deep (hit recursion limit)");
283		360
284	encode_ch (enc, '['); encode_nl (enc);	361	encode_ch (enc, '[');
285	++enc->indent;	362
		363	if (len >= 0)
		364	{
		365	encode_nl (enc); ++enc->indent;
286		366
287	for (i = 0; i <= len; ++i)	367	for (i = 0; i <= len; ++i)
288	{	368	{
		369	SV **svp = av_fetch (av, i, 0);
		370
289	encode_indent (enc);	371	encode_indent (enc);
290	encode_sv (enc, *av_fetch (av, i, 0));
291		372
		373	if (svp)
		374	encode_sv (enc, *svp);
		375	else
		376	encode_str (enc, "null", 4, 0);
		377
292	if (i < len)	378	if (i < len)
293	encode_comma (enc);	379	encode_comma (enc);
294	}	380	}
295		381
		382	encode_nl (enc); --enc->indent; encode_indent (enc);
		383	}
		384
296	encode_nl (enc);	385	encode_ch (enc, ']');
297
298	--enc->indent;
299	encode_indent (enc); encode_ch (enc, ']');
300	}	386	}
301		387
302	static void	388	static void
303	encode_he (enc_t *enc, HE *he)	389	encode_hk (enc_t *enc, HE *he)
304	{	390	{
305	encode_ch (enc, '"');	391	encode_ch (enc, '"');
306		392
307	if (HeKLEN (he) == HEf_SVKEY)	393	if (HeKLEN (he) == HEf_SVKEY)
308	{	394	{
…		…
318	else	404	else
319	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));	405	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));
320		406
321	encode_ch (enc, '"');	407	encode_ch (enc, '"');
322		408
323	if (enc->flags & F_SPACE_BEFORE) encode_space (enc);	409	if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);
324	encode_ch (enc, ':');	410	encode_ch (enc, ':');
325	if (enc->flags & F_SPACE_AFTER ) encode_space (enc);	411	if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);
326	encode_sv (enc, HeVAL (he));
327	}	412	}
328		413
329	// compare hash entries, used when all keys are bytestrings	414	// compare hash entries, used when all keys are bytestrings
330	static int	415	static int
331	he_cmp_fast (const void *a_, const void *b_)	416	he_cmp_fast (const void *a_, const void *b_)
…		…
336	HE *b = *(HE **)b_;	421	HE *b = *(HE **)b_;
337		422
338	STRLEN la = HeKLEN (a);	423	STRLEN la = HeKLEN (a);
339	STRLEN lb = HeKLEN (b);	424	STRLEN lb = HeKLEN (b);
340		425
341	if (!(cmp = memcmp (HeKEY (a), HeKEY (b), la < lb ? la : lb)))	426	if (!(cmp = memcmp (HeKEY (b), HeKEY (a), lb < la ? lb : la)))
342	cmp = la - lb;	427	cmp = lb - la;
343		428
344	return cmp;	429	return cmp;
345	}	430	}
346		431
347	// compare hash entries, used when some keys are sv's or utf-x	432	// compare hash entries, used when some keys are sv's or utf-x
348	static int	433	static int
349	he_cmp_slow (const void *a, const void *b)	434	he_cmp_slow (const void *a, const void *b)
350	{	435	{
351	return sv_cmp (HeSVKEY_force (*(HE **)a), HeSVKEY_force (*(HE **)b));	436	return sv_cmp (HeSVKEY_force (*(HE **)b), HeSVKEY_force (*(HE **)a));
352	}	437	}
353		438
354	static void	439	static void
355	encode_hv (enc_t *enc, HV *hv)	440	encode_hv (enc_t *enc, HV *hv)
356	{	441	{
357	int count, i;	442	HE *he;
358		443
359	if (enc->indent >= enc->maxdepth)	444	if (enc->indent >= enc->maxdepth)
360	croak ("data structure too deep (hit recursion limit)");	445	croak ("data structure too deep (hit recursion limit)");
361		446
362	encode_ch (enc, '{'); encode_nl (enc); ++enc->indent;	447	encode_ch (enc, '{');
363		448
364	if ((count = hv_iterinit (hv)))
365	{
366	// for canonical output we have to sort by keys first	449	// for canonical output we have to sort by keys first
367	// actually, this is mostly due to the stupid so-called	450	// actually, this is mostly due to the stupid so-called
368	// security workaround added somewhere in 5.8.x.	451	// security workaround added somewhere in 5.8.x.
369	// that randomises hash orderings	452	// that randomises hash orderings
370	if (enc->flags & F_CANONICAL)	453	if (enc->json.flags & F_CANONICAL)
		454	{
		455	int count = hv_iterinit (hv);
		456
		457	if (SvMAGICAL (hv))
371	{	458	{
		459	// need to count by iterating. could improve by dynamically building the vector below
		460	// but I don't care for the speed of this special case.
		461	// note also that we will run into undefined behaviour when the two iterations
		462	// do not result in the same count, something I might care for in some later release.
		463
		464	count = 0;
		465	while (hv_iternext (hv))
		466	++count;
		467
		468	hv_iterinit (hv);
		469	}
		470
		471	if (count)
		472	{
		473	int i, fast = 1;
		474	#if defined(__BORLANDC__) || defined(_MSC_VER)
		475	HE **hes = _alloca (count * sizeof (HE));
		476	#else
372	HE *he, *hes [count]; // if your compiler dies here, you need to enable C99 mode	477	HE *hes [count]; // if your compiler dies here, you need to enable C99 mode
373	int fast = 1;	478	#endif
374		479
375	i = 0;	480	i = 0;
376	while ((he = hv_iternext (hv)))	481	while ((he = hv_iternext (hv)))
377	{	482	{
378	hes [i++] = he;	483	hes [i++] = he;
…		…
400		505
401	FREETMPS;	506	FREETMPS;
402	LEAVE;	507	LEAVE;
403	}	508	}
404		509
405	for (i = 0; i < count; ++i)	510	encode_nl (enc); ++enc->indent;
		511
		512	while (count--)
406	{	513	{
407	encode_indent (enc);	514	encode_indent (enc);
		515	he = hes [count];
408	encode_he (enc, hes [i]);	516	encode_hk (enc, he);
		517	encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
409		518
410	if (i < count - 1)	519	if (count)
411	encode_comma (enc);	520	encode_comma (enc);
412	}	521	}
413		522
		523	encode_nl (enc); --enc->indent; encode_indent (enc);
		524	}
		525	}
		526	else
		527	{
		528	if (hv_iterinit (hv) || SvMAGICAL (hv))
		529	if ((he = hv_iternext (hv)))
		530	{
		531	encode_nl (enc); ++enc->indent;
		532
		533	for (;;)
		534	{
414	encode_nl (enc);	535	encode_indent (enc);
		536	encode_hk (enc, he);
		537	encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
		538
		539	if (!(he = hv_iternext (hv)))
		540	break;
		541
		542	encode_comma (enc);
		543	}
		544
		545	encode_nl (enc); --enc->indent; encode_indent (enc);
		546	}
		547	}
		548
		549	encode_ch (enc, '}');
		550	}
		551
		552	// encode objects, arrays and special \0=false and \1=true values.
		553	static void
		554	encode_rv (enc_t *enc, SV *sv)
		555	{
		556	svtype svt;
		557
		558	SvGETMAGIC (sv);
		559	svt = SvTYPE (sv);
		560
		561	if (expect_false (SvOBJECT (sv)))
		562	{
		563	HV *stash = !JSON_SLOW || json_boolean_stash
		564	? json_boolean_stash
		565	: gv_stashpv ("JSON::XS::Boolean", 1);
		566
		567	if (SvSTASH (sv) == stash)
		568	{
		569	if (SvIV (sv))
		570	encode_str (enc, "true", 4, 0);
		571	else
		572	encode_str (enc, "false", 5, 0);
415	}	573	}
416	else	574	else
417	{	575	{
418	HE *he = hv_iternext (hv);	576	#if 0
419		577	if (0 && sv_derived_from (rv, "JSON::Literal"))
420	for (;;)
421	{	578	{
422	encode_indent (enc);	579	// not yet
423	encode_he (enc, he);
424
425	if (!(he = hv_iternext (hv)))
426	break;
427
428	encode_comma (enc);
429	}	580	}
		581	#endif
		582	if (enc->json.flags & F_CONV_BLESSED)
		583	{
		584	// we re-bless the reference to get overload and other niceties right
		585	GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 0);
430		586
		587	if (to_json)
		588	{
		589	dSP;
		590
		591	ENTER; SAVETMPS; PUSHMARK (SP);
		592	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
		593
		594	// calling with G_SCALAR ensures that we always get a 1 return value
		595	PUTBACK;
		596	call_sv ((SV *)GvCV (to_json), G_SCALAR);
		597	SPAGAIN;
		598
		599	// catch this surprisingly common error
		600	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		601	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		602
		603	sv = POPs;
		604	PUTBACK;
		605
431	encode_nl (enc);	606	encode_sv (enc, sv);
		607
		608	FREETMPS; LEAVE;
		609	}
		610	else if (enc->json.flags & F_ALLOW_BLESSED)
		611	encode_str (enc, "null", 4, 0);
		612	else
		613	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
		614	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		615	}
		616	else if (enc->json.flags & F_ALLOW_BLESSED)
		617	encode_str (enc, "null", 4, 0);
		618	else
		619	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",
		620	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
432	}	621	}
433	}	622	}
434
435	--enc->indent; encode_indent (enc); encode_ch (enc, '}');
436	}
437
438	// encode objects, arrays and special \0=false and \1=true values.
439	static void
440	encode_rv (enc_t *enc, SV *sv)
441	{
442	svtype svt;
443
444	SvGETMAGIC (sv);
445	svt = SvTYPE (sv);
446
447	if (svt == SVt_PVHV)	623	else if (svt == SVt_PVHV)
448	encode_hv (enc, (HV *)sv);	624	encode_hv (enc, (HV *)sv);
449	else if (svt == SVt_PVAV)	625	else if (svt == SVt_PVAV)
450	encode_av (enc, (AV *)sv);	626	encode_av (enc, (AV *)sv);
451	else if (svt < SVt_PVAV)	627	else if (svt < SVt_PVAV)
452	{	628	{
453	if (SvNIOK (sv) && SvIV (sv) == 0)	629	STRLEN len = 0;
		630	char *pv = svt ? SvPV (sv, len) : 0;
		631
		632	if (len == 1 && *pv == '1')
		633	encode_str (enc, "true", 4, 0);
		634	else if (len == 1 && *pv == '0')
454	encode_str (enc, "false", 5, 0);	635	encode_str (enc, "false", 5, 0);
455	else if (SvNIOK (sv) && SvIV (sv) == 1)
456	encode_str (enc, "true", 4, 0);
457	else	636	else
458	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",	637	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
459	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	638	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
460	}	639	}
461	else	640	else
…		…
476	encode_str (enc, str, len, SvUTF8 (sv));	655	encode_str (enc, str, len, SvUTF8 (sv));
477	encode_ch (enc, '"');	656	encode_ch (enc, '"');
478	}	657	}
479	else if (SvNOKp (sv))	658	else if (SvNOKp (sv))
480	{	659	{
		660	// trust that perl will do the right thing w.r.t. JSON syntax.
481	need (enc, NV_DIG + 32);	661	need (enc, NV_DIG + 32);
482	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);	662	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
483	enc->cur += strlen (enc->cur);	663	enc->cur += strlen (enc->cur);
484	}	664	}
485	else if (SvIOKp (sv))	665	else if (SvIOKp (sv))
486	{	666	{
		667	// we assume we can always read an IV as a UV and vice versa
		668	// we assume two's complement
		669	// we assume no aliasing issues in the union
		670	if (SvIsUV (sv) ? SvUVX (sv) <= 59000
		671	: SvIVX (sv) <= 59000 && SvIVX (sv) >= -59000)
		672	{
		673	// optimise the "small number case"
		674	// code will likely be branchless and use only a single multiplication
		675	// works for numbers up to 59074
		676	I32 i = SvIVX (sv);
		677	U32 u;
		678	char digit, nz = 0;
		679
487	need (enc, 64);	680	need (enc, 6);
		681
		682	*enc->cur = '-'; enc->cur += i < 0 ? 1 : 0;
		683	u = i < 0 ? -i : i;
		684
		685	// convert to 4.28 fixed-point representation
		686	u = u * ((0xfffffff + 10000) / 10000); // 10**5, 5 fractional digits
		687
		688	// now output digit by digit, each time masking out the integer part
		689	// and multiplying by 5 while moving the decimal point one to the right,
		690	// resulting in a net multiplication by 10.
		691	// we always write the digit to memory but conditionally increment
		692	// the pointer, to enable the use of conditional move instructions.
		693	digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffffUL) * 5;
		694	digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffffUL) * 5;
		695	digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffffUL) * 5;
		696	digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffffUL) * 5;
		697	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
		698	}
		699	else
		700	{
		701	// large integer, use the (rather slow) snprintf way.
		702	need (enc, IVUV_MAXCHARS);
488	enc->cur +=	703	enc->cur +=
489	SvIsUV(sv)	704	SvIsUV(sv)
490	? snprintf (enc->cur, 64, "%"UVuf, (UV)SvUVX (sv))	705	? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv))
491	: snprintf (enc->cur, 64, "%"IVdf, (IV)SvIVX (sv));	706	: snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv));
		707	}
492	}	708	}
493	else if (SvROK (sv))	709	else if (SvROK (sv))
494	encode_rv (enc, SvRV (sv));	710	encode_rv (enc, SvRV (sv));
495	else if (!SvOK (sv))	711	else if (!SvOK (sv))
496	encode_str (enc, "null", 4, 0);	712	encode_str (enc, "null", 4, 0);
…		…
498	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",	714	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",
499	SvPV_nolen (sv), SvFLAGS (sv));	715	SvPV_nolen (sv), SvFLAGS (sv));
500	}	716	}
501		717
502	static SV *	718	static SV *
503	encode_json (SV *scalar, U32 flags)	719	encode_json (SV *scalar, JSON *json)
504	{	720	{
505	enc_t enc;	721	enc_t enc;
506		722
507	if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar))	723	if (!(json->flags & F_ALLOW_NONREF) && !SvROK (scalar))
508	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");	724	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
509		725
510	enc.flags = flags;	726	enc.json = *json;
511	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	727	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
512	enc.cur = SvPVX (enc.sv);	728	enc.cur = SvPVX (enc.sv);
513	enc.end = SvEND (enc.sv);	729	enc.end = SvEND (enc.sv);
514	enc.indent = 0;	730	enc.indent = 0;
515	enc.maxdepth = DEC_DEPTH (flags);	731	enc.maxdepth = DEC_DEPTH (enc.json.flags);
		732	enc.limit = enc.json.flags & F_ASCII ? 0x000080UL
		733	: enc.json.flags & F_LATIN1 ? 0x000100UL
		734	: 0x110000UL;
516		735
517	SvPOK_only (enc.sv);	736	SvPOK_only (enc.sv);
518	encode_sv (&enc, scalar);	737	encode_sv (&enc, scalar);
519		738
		739	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
		740	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
		741
520	if (!(flags & (F_ASCII | F_UTF8)))	742	if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8)))
521	SvUTF8_on (enc.sv);	743	SvUTF8_on (enc.sv);
522		744
523	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
524
525	if (enc.flags & F_SHRINK)	745	if (enc.json.flags & F_SHRINK)
526	shrink (enc.sv);	746	shrink (enc.sv);
527		747
528	return enc.sv;	748	return enc.sv;
529	}	749	}
530		750
…		…
535	typedef struct	755	typedef struct
536	{	756	{
537	char *cur; // current parser pointer	757	char *cur; // current parser pointer
538	char *end; // end of input string	758	char *end; // end of input string
539	const char *err; // parse error, if != 0	759	const char *err; // parse error, if != 0
540	U32 flags; // F_*	760	JSON json;
541	U32 depth; // recursion depth	761	U32 depth; // recursion depth
542	U32 maxdepth; // recursion depth limit	762	U32 maxdepth; // recursion depth limit
543	} dec_t;	763	} dec_t;
544		764
545	static void	765	INLINE void
		766	decode_comment (dec_t *dec)
		767	{
		768	// only '#'-style comments allowed a.t.m.
		769
		770	while (*dec->cur && *dec->cur != 0x0a && *dec->cur != 0x0d)
		771	++dec->cur;
		772	}
		773
		774	INLINE void
546	decode_ws (dec_t *dec)	775	decode_ws (dec_t *dec)
547	{	776	{
548	for (;;)	777	for (;;)
549	{	778	{
550	char ch = *dec->cur;	779	char ch = *dec->cur;
551		780
552	if (ch > 0x20	781	if (ch > 0x20)
		782	{
		783	if (expect_false (ch == '#'))
		784	{
		785	if (dec->json.flags & F_RELAXED)
		786	decode_comment (dec);
		787	else
		788	break;
		789	}
		790	else
		791	break;
		792	}
553	|| (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09))	793	else if (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)
554	break;	794	break; // parse error, but let higher level handle it, gives better error messages
555		795
556	++dec->cur;	796	++dec->cur;
557	}	797	}
558	}	798	}
559		799
…		…
576	decode_4hex (dec_t *dec)	816	decode_4hex (dec_t *dec)
577	{	817	{
578	signed char d1, d2, d3, d4;	818	signed char d1, d2, d3, d4;
579	unsigned char *cur = (unsigned char *)dec->cur;	819	unsigned char *cur = (unsigned char *)dec->cur;
580		820
581	d1 = decode_hexdigit [cur [0]]; if (d1 < 0) ERR ("four hexadecimal digits expected");	821	d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("exactly four hexadecimal digits expected");
582	d2 = decode_hexdigit [cur [1]]; if (d2 < 0) ERR ("four hexadecimal digits expected");	822	d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("exactly four hexadecimal digits expected");
583	d3 = decode_hexdigit [cur [2]]; if (d3 < 0) ERR ("four hexadecimal digits expected");	823	d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("exactly four hexadecimal digits expected");
584	d4 = decode_hexdigit [cur [3]]; if (d4 < 0) ERR ("four hexadecimal digits expected");	824	d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("exactly four hexadecimal digits expected");
585		825
586	dec->cur += 4;	826	dec->cur += 4;
587		827
588	return ((UV)d1) << 12	828	return ((UV)d1) << 12
589	| ((UV)d2) << 8	829	| ((UV)d2) << 8
…		…
597	static SV *	837	static SV *
598	decode_str (dec_t *dec)	838	decode_str (dec_t *dec)
599	{	839	{
600	SV *sv = 0;	840	SV *sv = 0;
601	int utf8 = 0;	841	int utf8 = 0;
		842	char *dec_cur = dec->cur;
602		843
603	do	844	do
604	{	845	{
605	char buf [SHORT_STRING_LEN + UTF8_MAX_LEN];	846	char buf [SHORT_STRING_LEN + UTF8_MAXBYTES];
606	char *cur = buf;	847	char *cur = buf;
607		848
608	do	849	do
609	{	850	{
610	unsigned char ch = *(unsigned char *)dec->cur++;	851	unsigned char ch = *(unsigned char *)dec_cur++;
611		852
612	if (ch == '"')	853	if (expect_false (ch == '"'))
613	{	854	{
614	--dec->cur;	855	--dec_cur;
615	break;	856	break;
616	}	857	}
617	else if (ch == '\\')	858	else if (expect_false (ch == '\\'))
618	{	859	{
619	switch (*dec->cur)	860	switch (*dec_cur)
620	{	861	{
621	case '\\':	862	case '\\':
622	case '/':	863	case '/':
623	case '"': *cur++ = *dec->cur++; break;	864	case '"': *cur++ = *dec_cur++; break;
624		865
625	case 'b': ++dec->cur; *cur++ = '\010'; break;	866	case 'b': ++dec_cur; *cur++ = '\010'; break;
626	case 't': ++dec->cur; *cur++ = '\011'; break;	867	case 't': ++dec_cur; *cur++ = '\011'; break;
627	case 'n': ++dec->cur; *cur++ = '\012'; break;	868	case 'n': ++dec_cur; *cur++ = '\012'; break;
628	case 'f': ++dec->cur; *cur++ = '\014'; break;	869	case 'f': ++dec_cur; *cur++ = '\014'; break;
629	case 'r': ++dec->cur; *cur++ = '\015'; break;	870	case 'r': ++dec_cur; *cur++ = '\015'; break;
630		871
631	case 'u':	872	case 'u':
632	{	873	{
633	UV lo, hi;	874	UV lo, hi;
634	++dec->cur;	875	++dec_cur;
635		876
		877	dec->cur = dec_cur;
636	hi = decode_4hex (dec);	878	hi = decode_4hex (dec);
		879	dec_cur = dec->cur;
637	if (hi == (UV)-1)	880	if (hi == (UV)-1)
638	goto fail;	881	goto fail;
639		882
640	// possibly a surrogate pair	883	// possibly a surrogate pair
641	if (hi >= 0xd800)	884	if (hi >= 0xd800)
642	if (hi < 0xdc00)	885	if (hi < 0xdc00)
643	{	886	{
644	if (dec->cur [0] != '\\' || dec->cur [1] != 'u')	887	if (dec_cur [0] != '\\' || dec_cur [1] != 'u')
645	ERR ("missing low surrogate character in surrogate pair");	888	ERR ("missing low surrogate character in surrogate pair");
646		889
647	dec->cur += 2;	890	dec_cur += 2;
648		891
		892	dec->cur = dec_cur;
649	lo = decode_4hex (dec);	893	lo = decode_4hex (dec);
		894	dec_cur = dec->cur;
650	if (lo == (UV)-1)	895	if (lo == (UV)-1)
651	goto fail;	896	goto fail;
652		897
653	if (lo < 0xdc00 || lo >= 0xe000)	898	if (lo < 0xdc00 || lo >= 0xe000)
654	ERR ("surrogate pair expected");	899	ERR ("surrogate pair expected");
…		…
660		905
661	if (hi >= 0x80)	906	if (hi >= 0x80)
662	{	907	{
663	utf8 = 1;	908	utf8 = 1;
664		909
665	cur = (char *)uvuni_to_utf8_flags (cur, hi, 0);	910	cur = encode_utf8 (cur, hi);
666	}	911	}
667	else	912	else
668	*cur++ = hi;	913	*cur++ = hi;
669	}	914	}
670	break;	915	break;
671		916
672	default:	917	default:
673	--dec->cur;	918	--dec_cur;
674	ERR ("illegal backslash escape sequence in string");	919	ERR ("illegal backslash escape sequence in string");
675	}	920	}
676	}	921	}
677	else if (ch >= 0x20 && ch <= 0x7f)	922	else if (expect_true (ch >= 0x20 && ch < 0x80))
678	*cur++ = ch;	923	*cur++ = ch;
679	else if (ch >= 0x80)	924	else if (ch >= 0x80)
680	{	925	{
681	STRLEN clen;	926	STRLEN clen;
682	UV uch;	927	UV uch;
683		928
684	--dec->cur;	929	--dec_cur;
685		930
686	uch = decode_utf8 (dec->cur, dec->end - dec->cur, &clen);	931	uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
687	if (clen == (STRLEN)-1)	932	if (clen == (STRLEN)-1)
688	ERR ("malformed UTF-8 character in JSON string");	933	ERR ("malformed UTF-8 character in JSON string");
689		934
690	do	935	do
691	*cur++ = *dec->cur++;	936	*cur++ = *dec_cur++;
692	while (--clen);	937	while (--clen);
693		938
694	utf8 = 1;	939	utf8 = 1;
695	}	940	}
696	else	941	else
697	{	942	{
698	--dec->cur;	943	--dec_cur;
699		944
700	if (!ch)	945	if (!ch)
701	ERR ("unexpected end of string while parsing JSON string");	946	ERR ("unexpected end of string while parsing JSON string");
702	else	947	else
703	ERR ("invalid character encountered while parsing JSON string");	948	ERR ("invalid character encountered while parsing JSON string");
…		…
716	}	961	}
717	else	962	else
718	sv = newSVpvn (buf, len);	963	sv = newSVpvn (buf, len);
719	}	964	}
720	}	965	}
721	while (*dec->cur != '"');	966	while (*dec_cur != '"');
722		967
723	++dec->cur;	968	++dec_cur;
724		969
725	if (sv)	970	if (sv)
726	{	971	{
727	SvPOK_only (sv);	972	SvPOK_only (sv);
728	*SvEND (sv) = 0;	973	*SvEND (sv) = 0;
…		…
731	SvUTF8_on (sv);	976	SvUTF8_on (sv);
732	}	977	}
733	else	978	else
734	sv = newSVpvn ("", 0);	979	sv = newSVpvn ("", 0);
735		980
		981	dec->cur = dec_cur;
736	return sv;	982	return sv;
737		983
738	fail:	984	fail:
		985	dec->cur = dec_cur;
739	return 0;	986	return 0;
740	}	987	}
741		988
742	static SV *	989	static SV *
743	decode_num (dec_t *dec)	990	decode_num (dec_t *dec)
…		…
801	is_nv = 1;	1048	is_nv = 1;
802	}	1049	}
803		1050
804	if (!is_nv)	1051	if (!is_nv)
805	{	1052	{
806	UV uv;	1053	int len = dec->cur - start;
807	int numtype = grok_number (start, dec->cur - start, &uv);	1054
808	if (numtype & IS_NUMBER_IN_UV)	1055	// special case the rather common 1..5-digit-int case
809	if (numtype & IS_NUMBER_NEG)	1056	if (*start == '-')
		1057	switch (len)
810	{	1058	{
811	if (uv < (UV)IV_MIN)	1059	case 2: return newSViv (-( start [1] - '0' * 1));
812	return newSViv (-(IV)uv);	1060	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));
		1061	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
		1062	case 5: return newSViv (-( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
		1063	case 6: return newSViv (-(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));
813	}	1064	}
		1065	else
		1066	switch (len)
		1067	{
		1068	case 1: return newSViv ( start [0] - '0' * 1);
		1069	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
		1070	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
		1071	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
		1072	case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);
		1073	}
		1074
		1075	{
		1076	UV uv;
		1077	int numtype = grok_number (start, len, &uv);
		1078	if (numtype & IS_NUMBER_IN_UV)
		1079	if (numtype & IS_NUMBER_NEG)
		1080	{
		1081	if (uv < (UV)IV_MIN)
		1082	return newSViv (-(IV)uv);
		1083	}
814	else	1084	else
815	return newSVuv (uv);	1085	return newSVuv (uv);
816	}	1086	}
817		1087
		1088	len -= *start == '-' ? 1 : 0;
		1089
		1090	// does not fit into IV or UV, try NV
		1091	if ((sizeof (NV) == sizeof (double) && DBL_DIG >= len)
		1092	#if defined (LDBL_DIG)
		1093	|| (sizeof (NV) == sizeof (long double) && LDBL_DIG >= len)
		1094	#endif
		1095	)
		1096	// fits into NV without loss of precision
		1097	return newSVnv (Atof (start));
		1098
		1099	// everything else fails, convert it to a string
		1100	return newSVpvn (start, dec->cur - start);
		1101	}
		1102
		1103	// loss of precision here
818	return newSVnv (Atof (start));	1104	return newSVnv (Atof (start));
819		1105
820	fail:	1106	fail:
821	return 0;	1107	return 0;
822	}	1108	}
…		…
852		1138
853	if (*dec->cur != ',')	1139	if (*dec->cur != ',')
854	ERR (", or ] expected while parsing array");	1140	ERR (", or ] expected while parsing array");
855		1141
856	++dec->cur;	1142	++dec->cur;
		1143
		1144	decode_ws (dec);
		1145
		1146	if (*dec->cur == ']' && dec->json.flags & F_RELAXED)
		1147	{
		1148	++dec->cur;
		1149	break;
		1150	}
857	}	1151	}
858		1152
859	DEC_DEC_DEPTH;	1153	DEC_DEC_DEPTH;
860	return newRV_noinc ((SV *)av);	1154	return newRV_noinc ((SV *)av);
861		1155
…		…
866	}	1160	}
867		1161
868	static SV *	1162	static SV *
869	decode_hv (dec_t *dec)	1163	decode_hv (dec_t *dec)
870	{	1164	{
		1165	SV *sv;
871	HV *hv = newHV ();	1166	HV *hv = newHV ();
872		1167
873	DEC_INC_DEPTH;	1168	DEC_INC_DEPTH;
874	decode_ws (dec);	1169	decode_ws (dec);
875		1170
876	if (*dec->cur == '}')	1171	if (*dec->cur == '}')
877	++dec->cur;	1172	++dec->cur;
878	else	1173	else
879	for (;;)	1174	for (;;)
880	{	1175	{
		1176	EXPECT_CH ('"');
		1177
		1178	// heuristic: assume that
		1179	// a) decode_str + hv_store_ent are abysmally slow.
		1180	// b) most hash keys are short, simple ascii text.
		1181	// => try to "fast-match" such strings to avoid
		1182	// the overhead of decode_str + hv_store_ent.
		1183	{
881	SV *key, *value;	1184	SV *value;
		1185	char *p = dec->cur;
		1186	char *e = p + 24; // only try up to 24 bytes
882		1187
883	decode_ws (dec); EXPECT_CH ('"');	1188	for (;;)
884
885	key = decode_str (dec);
886	if (!key)
887	goto fail;
888
889	decode_ws (dec); EXPECT_CH (':');
890
891	value = decode_sv (dec);
892	if (!value)
893	{	1189	{
		1190	// the >= 0x80 is false on most architectures
		1191	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
		1192	{
		1193	// slow path, back up and use decode_str
		1194	SV *key = decode_str (dec);
		1195	if (!key)
		1196	goto fail;
		1197
		1198	decode_ws (dec); EXPECT_CH (':');
		1199
		1200	decode_ws (dec);
		1201	value = decode_sv (dec);
		1202	if (!value)
		1203	{
		1204	SvREFCNT_dec (key);
		1205	goto fail;
		1206	}
		1207
		1208	hv_store_ent (hv, key, value, 0);
894	SvREFCNT_dec (key);	1209	SvREFCNT_dec (key);
		1210
		1211	break;
		1212	}
		1213	else if (*p == '"')
		1214	{
		1215	// fast path, got a simple key
		1216	char *key = dec->cur;
		1217	int len = p - key;
		1218	dec->cur = p + 1;
		1219
		1220	decode_ws (dec); EXPECT_CH (':');
		1221
		1222	decode_ws (dec);
		1223	value = decode_sv (dec);
		1224	if (!value)
895	goto fail;	1225	goto fail;
		1226
		1227	hv_store (hv, key, len, value, 0);
		1228
		1229	break;
		1230	}
		1231
		1232	++p;
896	}	1233	}
897		1234	}
898	hv_store_ent (hv, key, value, 0);
899	SvREFCNT_dec (key);
900		1235
901	decode_ws (dec);	1236	decode_ws (dec);
902		1237
903	if (*dec->cur == '}')	1238	if (*dec->cur == '}')
904	{	1239	{
…		…
908		1243
909	if (*dec->cur != ',')	1244	if (*dec->cur != ',')
910	ERR (", or } expected while parsing object/hash");	1245	ERR (", or } expected while parsing object/hash");
911		1246
912	++dec->cur;	1247	++dec->cur;
		1248
		1249	decode_ws (dec);
		1250
		1251	if (*dec->cur == '}' && dec->json.flags & F_RELAXED)
		1252	{
		1253	++dec->cur;
		1254	break;
		1255	}
913	}	1256	}
914		1257
915	DEC_DEC_DEPTH;	1258	DEC_DEC_DEPTH;
916	return newRV_noinc ((SV *)hv);	1259	sv = newRV_noinc ((SV *)hv);
		1260
		1261	// check filter callbacks
		1262	if (dec->json.flags & F_HOOK)
		1263	{
		1264	if (dec->json.cb_sk_object && HvKEYS (hv) == 1)
		1265	{
		1266	HE *cb, *he;
		1267
		1268	hv_iterinit (hv);
		1269	he = hv_iternext (hv);
		1270	hv_iterinit (hv);
		1271
		1272	// the next line creates a mortal sv each time its called.
		1273	// might want to optimise this for common cases.
		1274	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);
		1275
		1276	if (cb)
		1277	{
		1278	dSP;
		1279	int count;
		1280
		1281	ENTER; SAVETMPS; PUSHMARK (SP);
		1282	XPUSHs (HeVAL (he));
		1283
		1284	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
		1285
		1286	if (count == 1)
		1287	{
		1288	sv = newSVsv (POPs);
		1289	FREETMPS; LEAVE;
		1290	return sv;
		1291	}
		1292
		1293	FREETMPS; LEAVE;
		1294	}
		1295	}
		1296
		1297	if (dec->json.cb_object)
		1298	{
		1299	dSP;
		1300	int count;
		1301
		1302	ENTER; SAVETMPS; PUSHMARK (SP);
		1303	XPUSHs (sv_2mortal (sv));
		1304
		1305	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;
		1306
		1307	if (count == 1)
		1308	{
		1309	sv = newSVsv (POPs);
		1310	FREETMPS; LEAVE;
		1311	return sv;
		1312	}
		1313
		1314	SvREFCNT_inc (sv);
		1315	FREETMPS; LEAVE;
		1316	}
		1317	}
		1318
		1319	return sv;
917		1320
918	fail:	1321	fail:
919	SvREFCNT_dec (hv);	1322	SvREFCNT_dec (hv);
920	DEC_DEC_DEPTH;	1323	DEC_DEC_DEPTH;
921	return 0;	1324	return 0;
922	}	1325	}
923		1326
924	static SV *	1327	static SV *
925	decode_sv (dec_t *dec)	1328	decode_sv (dec_t *dec)
926	{	1329	{
927	decode_ws (dec);	1330	// the beauty of JSON: you need exactly one character lookahead
		1331	// to parse everything.
928	switch (*dec->cur)	1332	switch (*dec->cur)
929	{	1333	{
930	case '"': ++dec->cur; return decode_str (dec);	1334	case '"': ++dec->cur; return decode_str (dec);
931	case '[': ++dec->cur; return decode_av (dec);	1335	case '[': ++dec->cur; return decode_av (dec);
932	case '{': ++dec->cur; return decode_hv (dec);	1336	case '{': ++dec->cur; return decode_hv (dec);
933		1337
934	case '-':	1338	case '-':
935	case '0': case '1': case '2': case '3': case '4':	1339	case '0': case '1': case '2': case '3': case '4':
936	case '5': case '6': case '7': case '8': case '9':	1340	case '5': case '6': case '7': case '8': case '9':
937	return decode_num (dec);	1341	return decode_num (dec);
938		1342
939	case 't':	1343	case 't':
940	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1344	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
941	{	1345	{
942	dec->cur += 4;	1346	dec->cur += 4;
943	return newSViv (1);	1347	#if JSON_SLOW
		1348	json_true = get_sv ("JSON::XS::true", 1); SvREADONLY_on (json_true);
		1349	#endif
		1350	return SvREFCNT_inc (json_true);
944	}	1351	}
945	else	1352	else
946	ERR ("'true' expected");	1353	ERR ("'true' expected");
947		1354
948	break;	1355	break;
949		1356
950	case 'f':	1357	case 'f':
951	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))	1358	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
952	{	1359	{
953	dec->cur += 5;	1360	dec->cur += 5;
954	return newSViv (0);	1361	#if JSON_SLOW
		1362	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);
		1363	#endif
		1364	return SvREFCNT_inc (json_false);
955	}	1365	}
956	else	1366	else
957	ERR ("'false' expected");	1367	ERR ("'false' expected");
958		1368
959	break;	1369	break;
…		…
977	fail:	1387	fail:
978	return 0;	1388	return 0;
979	}	1389	}
980		1390
981	static SV *	1391	static SV *
982	decode_json (SV *string, U32 flags)	1392	decode_json (SV *string, JSON *json, STRLEN *offset_return)
983	{	1393	{
984	dec_t dec;	1394	dec_t dec;
		1395	STRLEN offset;
985	SV *sv;	1396	SV *sv;
986		1397
		1398	SvGETMAGIC (string);
987	SvUPGRADE (string, SVt_PV);	1399	SvUPGRADE (string, SVt_PV);
988		1400
		1401	if (json->flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (json->flags))
		1402	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		1403	(unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (json->flags));
		1404
989	if (flags & F_UTF8)	1405	if (json->flags & F_UTF8)
990	sv_utf8_downgrade (string, 0);	1406	sv_utf8_downgrade (string, 0);
991	else	1407	else
992	sv_utf8_upgrade (string);	1408	sv_utf8_upgrade (string);
993		1409
994	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1410	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
995		1411
996	dec.flags = flags;	1412	dec.json = *json;
997	dec.cur = SvPVX (string);	1413	dec.cur = SvPVX (string);
998	dec.end = SvEND (string);	1414	dec.end = SvEND (string);
999	dec.err = 0;	1415	dec.err = 0;
1000	dec.depth = 0;	1416	dec.depth = 0;
1001	dec.maxdepth = DEC_DEPTH (dec.flags);	1417	dec.maxdepth = DEC_DEPTH (dec.json.flags);
1002		1418
		1419	if (dec.json.cb_object || dec.json.cb_sk_object)
		1420	dec.json.flags |= F_HOOK;
		1421
1003	*dec.end = 0; // this should basically be a nop, too, but make sure its there	1422	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
		1423
		1424	decode_ws (&dec);
1004	sv = decode_sv (&dec);	1425	sv = decode_sv (&dec);
1005		1426
		1427	if (!(offset_return || !sv))
		1428	{
		1429	// check for trailing garbage
		1430	decode_ws (&dec);
		1431
		1432	if (*dec.cur)
		1433	{
		1434	dec.err = "garbage after JSON object";
		1435	SvREFCNT_dec (sv);
		1436	sv = 0;
		1437	}
		1438	}
		1439
		1440	if (offset_return || !sv)
		1441	{
		1442	offset = dec.json.flags & F_UTF8
		1443	? dec.cur - SvPVX (string)
		1444	: utf8_distance (dec.cur, SvPVX (string));
		1445
		1446	if (offset_return)
		1447	*offset_return = offset;
		1448	}
		1449
1006	if (!sv)	1450	if (!sv)
1007	{	1451	{
1008	IV offset = dec.flags & F_UTF8
1009	? dec.cur - SvPVX (string)
1010	: utf8_distance (dec.cur, SvPVX (string));
1011	SV *uni = sv_newmortal ();	1452	SV *uni = sv_newmortal ();
1012		1453
1013	// horrible hack to silence warning inside pv_uni_display	1454	// horrible hack to silence warning inside pv_uni_display
1014	COP cop = *PL_curcop;	1455	COP cop = *PL_curcop;
1015	cop.cop_warnings = pWARN_NONE;	1456	cop.cop_warnings = pWARN_NONE;
…		…
1025	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1466	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
1026	}	1467	}
1027		1468
1028	sv = sv_2mortal (sv);	1469	sv = sv_2mortal (sv);
1029		1470
1030	if (!(dec.flags & F_ALLOW_NONREF) && !SvROK (sv))	1471	if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))
1031	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");	1472	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
1032		1473
1033	return sv;	1474	return sv;
		1475	}
		1476
		1477	/////////////////////////////////////////////////////////////////////////////
		1478	// incremental parser
		1479
		1480	static void
		1481	incr_parse (JSON *self)
		1482	{
		1483	const char *p = SvPVX (self->incr_text) + self->incr_pos;
		1484
		1485	for (;;)
		1486	{
		1487	//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
		1488	switch (self->incr_mode)
		1489	{
		1490	// only used for intiial whitespace skipping
		1491	case INCR_M_WS:
		1492	for (;;)
		1493	{
		1494	if (*p > 0x20)
		1495	{
		1496	self->incr_mode = INCR_M_JSON;
		1497	goto incr_m_json;
		1498	}
		1499	else if (!*p)
		1500	goto interrupt;
		1501
		1502	++p;
		1503	}
		1504
		1505	// skip a single char inside a string (for \\-processing)
		1506	case INCR_M_BS:
		1507	if (!*p)
		1508	goto interrupt;
		1509
		1510	++p;
		1511	self->incr_mode = INCR_M_STR;
		1512	goto incr_m_str;
		1513
		1514	// inside a string
		1515	case INCR_M_STR:
		1516	incr_m_str:
		1517	for (;;)
		1518	{
		1519	if (*p == '"')
		1520	{
		1521	++p;
		1522	self->incr_mode = INCR_M_JSON;
		1523
		1524	if (!self->incr_nest)
		1525	goto interrupt;
		1526
		1527	goto incr_m_json;
		1528	}
		1529	else if (*p == '\\')
		1530	{
		1531	++p; // "virtually" consumes character after \
		1532
		1533	if (!*p) // if at end of string we have to switch modes
		1534	{
		1535	self->incr_mode = INCR_M_BS;
		1536	goto interrupt;
		1537	}
		1538	}
		1539	else if (!*p)
		1540	goto interrupt;
		1541
		1542	++p;
		1543	}
		1544
		1545	// after initial ws, outside string
		1546	case INCR_M_JSON:
		1547	incr_m_json:
		1548	for (;;)
		1549	{
		1550	switch (*p++)
		1551	{
		1552	case 0:
		1553	--p;
		1554	goto interrupt;
		1555
		1556	case 0x09:
		1557	case 0x0a:
		1558	case 0x0d:
		1559	case 0x20:
		1560	if (!self->incr_nest)
		1561	{
		1562	--p; // do not eat the whitespace, let the next round do it
		1563	goto interrupt;
		1564	}
		1565	break;
		1566
		1567	case '"':
		1568	self->incr_mode = INCR_M_STR;
		1569	goto incr_m_str;
		1570
		1571	case '[':
		1572	case '{':
		1573	++self->incr_nest;
		1574	break;
		1575
		1576	case ']':
		1577	case '}':
		1578	if (!--self->incr_nest)
		1579	goto interrupt;
		1580	}
		1581	}
		1582	}
		1583
		1584	modechange:
		1585	;
		1586	}
		1587
		1588	interrupt:
		1589	self->incr_pos = p - SvPVX (self->incr_text);
		1590	//printf ("return pos %d mode %d nest %d\n", self->incr_pos, self->incr_mode, self->incr_nest);//D
1034	}	1591	}
1035		1592
1036	/////////////////////////////////////////////////////////////////////////////	1593	/////////////////////////////////////////////////////////////////////////////
1037	// XS interface functions	1594	// XS interface functions
1038		1595
1039	MODULE = JSON::XS PACKAGE = JSON::XS	1596	MODULE = JSON::XS PACKAGE = JSON::XS
1040		1597
1041	BOOT:	1598	BOOT:
1042	{	1599	{
1043	int i;	1600	int i;
1044
1045	memset (decode_hexdigit, 0xff, 256);
1046		1601
1047	for (i = 0; i < 256; ++i)	1602	for (i = 0; i < 256; ++i)
1048	decode_hexdigit [i] =	1603	decode_hexdigit [i] =
1049	i >= '0' && i <= '9' ? i - '0'	1604	i >= '0' && i <= '9' ? i - '0'
1050	: i >= 'a' && i <= 'f' ? i - 'a' + 10	1605	: i >= 'a' && i <= 'f' ? i - 'a' + 10
1051	: i >= 'A' && i <= 'F' ? i - 'A' + 10	1606	: i >= 'A' && i <= 'F' ? i - 'A' + 10
1052	: -1;	1607	: -1;
1053		1608
1054	json_stash = gv_stashpv ("JSON::XS", 1);	1609	json_stash = gv_stashpv ("JSON::XS" , 1);
		1610	json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);
		1611
		1612	json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true );
		1613	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);
1055	}	1614	}
1056		1615
1057	PROTOTYPES: DISABLE	1616	PROTOTYPES: DISABLE
1058		1617
1059	SV *new (char *dummy)	1618	void CLONE (...)
1060	CODE:	1619	CODE:
1061	RETVAL = sv_bless (newRV_noinc (newSVuv (F_DEFAULT)), json_stash);	1620	json_stash = 0;
		1621	json_boolean_stash = 0;
		1622
		1623	void new (char *klass)
		1624	PPCODE:
		1625	{
		1626	SV *pv = NEWSV (0, sizeof (JSON));
		1627	SvPOK_only (pv);
		1628	Zero (SvPVX (pv), 1, JSON);
		1629	((JSON *)SvPVX (pv))->flags = F_DEFAULT;
		1630	XPUSHs (sv_2mortal (sv_bless (
		1631	newRV_noinc (pv),
		1632	strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)
		1633	)));
		1634	}
		1635
		1636	void ascii (JSON *self, int enable = 1)
		1637	ALIAS:
		1638	ascii = F_ASCII
		1639	latin1 = F_LATIN1
		1640	utf8 = F_UTF8
		1641	indent = F_INDENT
		1642	canonical = F_CANONICAL
		1643	space_before = F_SPACE_BEFORE
		1644	space_after = F_SPACE_AFTER
		1645	pretty = F_PRETTY
		1646	allow_nonref = F_ALLOW_NONREF
		1647	shrink = F_SHRINK
		1648	allow_blessed = F_ALLOW_BLESSED
		1649	convert_blessed = F_CONV_BLESSED
		1650	relaxed = F_RELAXED
		1651	PPCODE:
		1652	{
		1653	if (enable)
		1654	self->flags |= ix;
		1655	else
		1656	self->flags &= ~ix;
		1657
		1658	XPUSHs (ST (0));
		1659	}
		1660
		1661	void get_ascii (JSON *self)
		1662	ALIAS:
		1663	get_ascii = F_ASCII
		1664	get_latin1 = F_LATIN1
		1665	get_utf8 = F_UTF8
		1666	get_indent = F_INDENT
		1667	get_canonical = F_CANONICAL
		1668	get_space_before = F_SPACE_BEFORE
		1669	get_space_after = F_SPACE_AFTER
		1670	get_allow_nonref = F_ALLOW_NONREF
		1671	get_shrink = F_SHRINK
		1672	get_allow_blessed = F_ALLOW_BLESSED
		1673	get_convert_blessed = F_CONV_BLESSED
		1674	get_relaxed = F_RELAXED
		1675	PPCODE:
		1676	XPUSHs (boolSV (self->flags & ix));
		1677
		1678	void max_depth (JSON *self, UV max_depth = 0x80000000UL)
		1679	PPCODE:
		1680	{
		1681	UV log2 = 0;
		1682
		1683	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;
		1684
		1685	while ((1UL << log2) < max_depth)
		1686	++log2;
		1687
		1688	self->flags = self->flags & ~F_MAXDEPTH | (log2 << S_MAXDEPTH);
		1689
		1690	XPUSHs (ST (0));
		1691	}
		1692
		1693	U32 get_max_depth (JSON *self)
		1694	CODE:
		1695	RETVAL = DEC_DEPTH (self->flags);
1062	OUTPUT:	1696	OUTPUT:
1063	RETVAL	1697	RETVAL
1064		1698
1065	SV *ascii (SV *self, int enable = 1)	1699	void max_size (JSON *self, UV max_size = 0)
1066	ALIAS:	1700	PPCODE:
1067	ascii = F_ASCII	1701	{
1068	utf8 = F_UTF8	1702	UV log2 = 0;
1069	indent = F_INDENT	1703
1070	canonical = F_CANONICAL	1704	if (max_size > 0x80000000UL) max_size = 0x80000000UL;
1071	space_before = F_SPACE_BEFORE	1705	if (max_size == 1) max_size = 2;
1072	space_after = F_SPACE_AFTER	1706
1073	pretty = F_PRETTY	1707	while ((1UL << log2) < max_size)
1074	allow_nonref = F_ALLOW_NONREF	1708	++log2;
1075	shrink = F_SHRINK	1709
		1710	self->flags = self->flags & ~F_MAXSIZE | (log2 << S_MAXSIZE);
		1711
		1712	XPUSHs (ST (0));
		1713	}
		1714
		1715	int get_max_size (JSON *self)
1076	CODE:	1716	CODE:
1077	{	1717	RETVAL = DEC_SIZE (self->flags);
1078	UV *uv = SvJSON (self);
1079	if (enable)
1080	*uv |= ix;
1081	else
1082	*uv &= ~ix;
1083
1084	RETVAL = newSVsv (self);
1085	}
1086	OUTPUT:	1718	OUTPUT:
1087	RETVAL	1719	RETVAL
1088		1720
1089	SV *max_depth (SV *self, UV max_depth = 0x80000000UL)	1721	void filter_json_object (JSON *self, SV *cb = &PL_sv_undef)
		1722	PPCODE:
		1723	{
		1724	SvREFCNT_dec (self->cb_object);
		1725	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;
		1726
		1727	XPUSHs (ST (0));
		1728	}
		1729
		1730	void filter_json_single_key_object (JSON *self, SV *key, SV *cb = &PL_sv_undef)
		1731	PPCODE:
		1732	{
		1733	if (!self->cb_sk_object)
		1734	self->cb_sk_object = newHV ();
		1735
		1736	if (SvOK (cb))
		1737	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
		1738	else
		1739	{
		1740	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
		1741
		1742	if (!HvKEYS (self->cb_sk_object))
		1743	{
		1744	SvREFCNT_dec (self->cb_sk_object);
		1745	self->cb_sk_object = 0;
		1746	}
		1747	}
		1748
		1749	XPUSHs (ST (0));
		1750	}
		1751
		1752	void encode (JSON *self, SV *scalar)
		1753	PPCODE:
		1754	XPUSHs (encode_json (scalar, self));
		1755
		1756	void decode (JSON *self, SV *jsonstr)
		1757	PPCODE:
		1758	XPUSHs (decode_json (jsonstr, self, 0));
		1759
		1760	void decode_prefix (JSON *self, SV *jsonstr)
		1761	PPCODE:
		1762	{
		1763	STRLEN offset;
		1764	EXTEND (SP, 2);
		1765	PUSHs (decode_json (jsonstr, self, &offset));
		1766	PUSHs (sv_2mortal (newSVuv (offset)));
		1767	}
		1768
		1769	void incr_parse (JSON *self, SV *jsonstr = 0)
		1770	PPCODE:
		1771	{
		1772	if (!self->incr_text)
		1773	self->incr_text = newSVpvn ("", 0);
		1774
		1775	// append data, if any
		1776	if (jsonstr)
		1777	{
		1778	if (SvUTF8 (jsonstr) && !SvUTF8 (self->incr_text))
		1779	{
		1780	/* utf-8-ness differs, need to upgrade */
		1781	sv_utf8_upgrade (self->incr_text);
		1782
		1783	if (self->incr_pos)
		1784	self->incr_pos = utf8_hop ((U8 *)SvPVX (self->incr_text), self->incr_pos)
		1785	- (U8 *)SvPVX (self->incr_text);
		1786	}
		1787
		1788	{
		1789	STRLEN len;
		1790	const char *str = SvPV (jsonstr, len);
		1791	SvGROW (self->incr_text, SvCUR (self->incr_text) + len + 1);
		1792	Move (str, SvEND (self->incr_text), len, char);
		1793	SvCUR_set (self->incr_text, SvCUR (self->incr_text) + len);
		1794	*SvEND (self->incr_text) = 0; // this should basically be a nop, too, but make sure it's there
		1795	}
		1796	}
		1797
		1798	if (GIMME_V != G_VOID)
		1799	do
		1800	{
		1801	STRLEN offset;
		1802
		1803	incr_parse (self);
		1804
		1805	if (!INCR_DONE (self))
		1806	break;
		1807
		1808	XPUSHs (decode_json (self->incr_text, self, &offset));
		1809
		1810	sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + offset);
		1811	self->incr_pos -= offset;
		1812	self->incr_nest = 0;
		1813	self->incr_mode = 0;
		1814	}
		1815	while (GIMME_V == G_ARRAY);
		1816	}
		1817
		1818	SV *incr_text (JSON *self)
		1819	ATTRS: lvalue
1090	CODE:	1820	CODE:
1091	{	1821	{
1092	UV *uv = SvJSON (self);	1822	if (self->incr_pos)
1093	UV log2 = 0;	1823	croak ("incr_text can only be called after a successful incr_parse call in scalar context");
1094		1824
1095	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;	1825	RETVAL = self->incr_text ? SvREFCNT_inc (self->incr_text) : &PL_sv_undef;
1096
1097	while ((1UL << log2) < max_depth)
1098	++log2;
1099
1100	*uv = *uv & ~F_MAXDEPTH | (log2 << S_MAXDEPTH);
1101
1102	RETVAL = newSVsv (self);
1103	}	1826	}
1104	OUTPUT:	1827	OUTPUT:
1105	RETVAL	1828	RETVAL
1106		1829
		1830	void incr_skip (JSON *self)
		1831	CODE:
		1832	{
		1833	sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + self->incr_pos);
		1834	self->incr_pos = 0;
		1835	self->incr_nest = 0;
		1836	self->incr_mode = 0;
		1837	}
		1838
		1839	void DESTROY (JSON *self)
		1840	CODE:
		1841	SvREFCNT_dec (self->cb_sk_object);
		1842	SvREFCNT_dec (self->cb_object);
		1843	SvREFCNT_dec (self->incr_text);
		1844
		1845	PROTOTYPES: ENABLE
		1846
1107	void encode (SV *self, SV *scalar)	1847	void encode_json (SV *scalar)
		1848	ALIAS:
		1849	to_json_ = 0
		1850	encode_json = F_UTF8
1108	PPCODE:	1851	PPCODE:
		1852	{
		1853	JSON json = { F_DEFAULT | ix };
1109	XPUSHs (encode_json (scalar, *SvJSON (self)));	1854	XPUSHs (encode_json (scalar, &json));
		1855	}
1110		1856
1111	void decode (SV *self, SV *jsonstr)	1857	void decode_json (SV *jsonstr)
		1858	ALIAS:
		1859	from_json_ = 0
		1860	decode_json = F_UTF8
1112	PPCODE:	1861	PPCODE:
		1862	{
		1863	JSON json = { F_DEFAULT | ix };
1113	XPUSHs (decode_json (jsonstr, *SvJSON (self)));	1864	XPUSHs (decode_json (jsonstr, &json, 0));
		1865	}
1114		1866
1115	PROTOTYPES: ENABLE
1116		1867
1117	void to_json (SV *scalar)
1118	ALIAS:
1119	objToJson = 0
1120	PPCODE:
1121	XPUSHs (encode_json (scalar, F_DEFAULT | F_UTF8));
1122
1123	void from_json (SV *jsonstr)
1124	ALIAS:
1125	jsonToObj = 0
1126	PPCODE:
1127	XPUSHs (decode_json (jsonstr, F_DEFAULT | F_UTF8));
1128

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