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Comparing JSON-XS/XS.xs (file contents):
Revision 1.16 by root, Sun Mar 25 02:37:00 2007 UTC vs.
Revision 1.95 by root, Sun Feb 22 06:55:28 2009 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>
		9	#include <limits.h>
		10	#include <float.h>
8		11
		12	#if defined(__BORLANDC__) || defined(_MSC_VER)
		13	# define snprintf _snprintf // C compilers have this in stdio.h
		14	#endif
		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
9	#define F_ASCII 0x00000001	24	#define F_ASCII 0x00000001UL
		25	#define F_LATIN1 0x00000002UL
10	#define F_UTF8 0x00000002	26	#define F_UTF8 0x00000004UL
11	#define F_INDENT 0x00000004	27	#define F_INDENT 0x00000008UL
12	#define F_CANONICAL 0x00000008	28	#define F_CANONICAL 0x00000010UL
13	#define F_SPACE_BEFORE 0x00000010	29	#define F_SPACE_BEFORE 0x00000020UL
14	#define F_SPACE_AFTER 0x00000020	30	#define F_SPACE_AFTER 0x00000040UL
15	#define F_ALLOW_NONREF 0x00000080	31	#define F_ALLOW_NONREF 0x00000100UL
16	#define F_SHRINK 0x00000100	32	#define F_SHRINK 0x00000200UL
17		33	#define F_ALLOW_BLESSED 0x00000400UL
18	// F_SKIPINVALID?	34	#define F_CONV_BLESSED 0x00000800UL
19	// F_EXECCODEREF?	35	#define F_RELAXED 0x00001000UL
20	// F_SELFCONVERT?	36	#define F_ALLOW_UNKNOWN 0x00002000UL
		37	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
21		38
22	#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER	39	#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER
23	#define F_DEFAULT 0
24		40
25	#define INIT_SIZE 32 // initial scalar size to be allocated	41	#define INIT_SIZE 32 // initial scalar size to be allocated
26	#define INDENT_STEP 3 // spaces per indentation level	42	#define INDENT_STEP 3 // spaces per indentation level
27		43
28	#define UTF8_MAX_LEN 11 // for perls UTF-X: max. number of octets per character
29	#define SHORT_STRING_LEN 512 // special-case strings of up to this size	44	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size
30		45
31	#define SB do {	46	#define SB do {
32	#define SE } while (0)	47	#define SE } while (0)
33		48
		49	#if __GNUC__ >= 3
		50	# define expect(expr,value) __builtin_expect ((expr), (value))
		51	# define INLINE static inline
		52	#else
		53	# define expect(expr,value) (expr)
		54	# define INLINE static
		55	#endif
		56
		57	#define expect_false(expr) expect ((expr) != 0, 0)
		58	#define expect_true(expr) expect ((expr) != 0, 1)
		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
34	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	}
35		107
36	/////////////////////////////////////////////////////////////////////////////	108	/////////////////////////////////////////////////////////////////////////////
37	// utility functions	109	// utility functions
38		110
39	static UV *	111	INLINE SV *
40	SvJSON (SV *sv)	112	get_bool (const char *name)
41	{	113	{
42	if (!(SvROK (sv) && SvOBJECT (SvRV (sv)) && SvSTASH (SvRV (sv)) == json_stash))	114	SV *sv = get_sv (name, 1);
43	croak ("object is not of type JSON::XS");
44		115
45	return &SvUVX (SvRV (sv));	116	SvREADONLY_on (sv);
46	}	117	SvREADONLY_on (SvRV (sv));
47		118
48	static void	119	return sv;
		120	}
		121
		122	INLINE void
49	shrink (SV *sv)	123	shrink (SV *sv)
50	{	124	{
51	sv_utf8_downgrade (sv, 1);	125	sv_utf8_downgrade (sv, 1);
		126
52	if (SvLEN (sv) > SvCUR (sv) + 1)	127	if (SvLEN (sv) > SvCUR (sv) + 1)
53	{	128	{
54	#ifdef SvPV_shrink_to_cur	129	#ifdef SvPV_shrink_to_cur
55	SvPV_shrink_to_cur (sv);	130	SvPV_shrink_to_cur (sv);
56	#elif defined (SvPV_renew)	131	#elif defined (SvPV_renew)
…		…
62	// 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
63	// case of an error.	138	// case of an error.
64	// we special-case "safe" characters from U+80 .. U+7FF,	139	// we special-case "safe" characters from U+80 .. U+7FF,
65	// but use the very good perl function to parse anything else.	140	// but use the very good perl function to parse anything else.
66	// note that we never call this function for a ascii codepoints	141	// note that we never call this function for a ascii codepoints
67	static UV	142	INLINE UV
68	decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)	143	decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)
69	{	144	{
70	if (s[0] > 0xdf || s[0] < 0xc2)	145	if (expect_true (len >= 2
71	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);	146	&& IN_RANGE_INC (char, s[0], 0xc2, 0xdf)
72	else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf)	147	&& IN_RANGE_INC (char, s[1], 0x80, 0xbf)))
73	{	148	{
74	*clen = 2;	149	*clen = 2;
75	return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);	150	return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);
76	}	151	}
77	else	152	else
78	return (UV)-1;	153	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);
		154	}
		155
		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;
79	}	178	}
80		179
81	/////////////////////////////////////////////////////////////////////////////	180	/////////////////////////////////////////////////////////////////////////////
82	// encoder	181	// encoder
83		182
…		…
85	typedef struct	184	typedef struct
86	{	185	{
87	char *cur; // SvPVX (sv) + current output position	186	char *cur; // SvPVX (sv) + current output position
88	char *end; // SvEND (sv)	187	char *end; // SvEND (sv)
89	SV *sv; // result scalar	188	SV *sv; // result scalar
90	UV flags; // F_*	189	JSON json;
91	int indent; // indentation level	190	U32 indent; // indentation level
92	int max_depth; // max. recursion level	191	UV limit; // escape character values >= this value when encoding
93	} enc_t;	192	} enc_t;
94		193
95	static void	194	INLINE void
96	need (enc_t *enc, STRLEN len)	195	need (enc_t *enc, STRLEN len)
97	{	196	{
98	if (enc->cur + len >= enc->end)	197	if (expect_false (enc->cur + len >= enc->end))
99	{	198	{
100	STRLEN cur = enc->cur - SvPVX (enc->sv);	199	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
101	SvGROW (enc->sv, cur + len + 1);	200	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
102	enc->cur = SvPVX (enc->sv) + cur;	201	enc->cur = SvPVX (enc->sv) + cur;
103	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv);	202	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
104	}	203	}
105	}	204	}
106		205
107	static void	206	INLINE void
108	encode_ch (enc_t *enc, char ch)	207	encode_ch (enc_t *enc, char ch)
109	{	208	{
110	need (enc, 1);	209	need (enc, 1);
111	*enc->cur++ = ch;	210	*enc->cur++ = ch;
112	}	211	}
…		…
120		219
121	while (str < end)	220	while (str < end)
122	{	221	{
123	unsigned char ch = *(unsigned char *)str;	222	unsigned char ch = *(unsigned char *)str;
124		223
125	if (ch >= 0x20 && ch < 0x80) // most common case	224	if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case
126	{	225	{
127	if (ch == '"') // but with slow exceptions	226	if (expect_false (ch == '"')) // but with slow exceptions
128	{	227	{
129	need (enc, len += 1);	228	need (enc, len += 1);
130	*enc->cur++ = '\\';	229	*enc->cur++ = '\\';
131	*enc->cur++ = '"';	230	*enc->cur++ = '"';
132	}	231	}
133	else if (ch == '\\')	232	else if (expect_false (ch == '\\'))
134	{	233	{
135	need (enc, len += 1);	234	need (enc, len += 1);
136	*enc->cur++ = '\\';	235	*enc->cur++ = '\\';
137	*enc->cur++ = '\\';	236	*enc->cur++ = '\\';
138	}	237	}
…		…
156	STRLEN clen;	255	STRLEN clen;
157	UV uch;	256	UV uch;
158		257
159	if (is_utf8)	258	if (is_utf8)
160	{	259	{
161	//uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY);
162	uch = decode_utf8 (str, end - str, &clen);	260	uch = decode_utf8 (str, end - str, &clen);
163	if (clen == (STRLEN)-1)	261	if (clen == (STRLEN)-1)
164	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);
165	}	263	}
166	else	264	else
167	{	265	{
168	uch = ch;	266	uch = ch;
169	clen = 1;	267	clen = 1;
170	}	268	}
171		269
172	if (uch > 0x10FFFFUL)	270	if (uch < 0x80/*0x20*/ || uch >= enc->limit)
173	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
174
175	if (uch < 0x80 || enc->flags & F_ASCII)
176	{	271	{
177	if (uch > 0xFFFFUL)	272	if (uch >= 0x10000UL)
178	{	273	{
		274	if (uch >= 0x110000UL)
		275	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
		276
179	need (enc, len += 11);	277	need (enc, len += 11);
180	sprintf (enc->cur, "\\u%04x\\u%04x",	278	sprintf (enc->cur, "\\u%04x\\u%04x",
181	(int)((uch - 0x10000) / 0x400 + 0xD800),	279	(int)((uch - 0x10000) / 0x400 + 0xD800),
182	(int)((uch - 0x10000) % 0x400 + 0xDC00));	280	(int)((uch - 0x10000) % 0x400 + 0xDC00));
183	enc->cur += 12;	281	enc->cur += 12;
184	}	282	}
185	else	283	else
186	{	284	{
187	static char hexdigit [16] = "0123456789abcdef";
188	need (enc, len += 5);	285	need (enc, len += 5);
189	*enc->cur++ = '\\';	286	*enc->cur++ = '\\';
190	*enc->cur++ = 'u';	287	*enc->cur++ = 'u';
191	*enc->cur++ = hexdigit [ uch >> 12 ];	288	*enc->cur++ = PL_hexdigit [ uch >> 12 ];
192	*enc->cur++ = hexdigit [(uch >> 8) & 15];	289	*enc->cur++ = PL_hexdigit [(uch >> 8) & 15];
193	*enc->cur++ = hexdigit [(uch >> 4) & 15];	290	*enc->cur++ = PL_hexdigit [(uch >> 4) & 15];
194	*enc->cur++ = hexdigit [(uch >> 0) & 15];	291	*enc->cur++ = PL_hexdigit [(uch >> 0) & 15];
195	}	292	}
196		293
		294	str += clen;
		295	}
		296	else if (enc->json.flags & F_LATIN1)
		297	{
		298	*enc->cur++ = uch;
197	str += clen;	299	str += clen;
198	}	300	}
199	else if (is_utf8)	301	else if (is_utf8)
200	{	302	{
201	need (enc, len += clen);	303	need (enc, len += clen);
…		…
205	}	307	}
206	while (--clen);	308	while (--clen);
207	}	309	}
208	else	310	else
209	{	311	{
210	need (enc, len += UTF8_MAX_LEN - 1); // never more than 11 bytes needed	312	need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed
211	enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0);	313	enc->cur = encode_utf8 (enc->cur, uch);
212	++str;	314	++str;
213	}	315	}
214	}	316	}
215	}	317	}
216	}	318	}
217		319
218	--len;	320	--len;
219	}	321	}
220	}	322	}
221		323
222	static void	324	INLINE void
223	encode_indent (enc_t *enc)	325	encode_indent (enc_t *enc)
224	{	326	{
225	if (enc->flags & F_INDENT)	327	if (enc->json.flags & F_INDENT)
226	{	328	{
227	int spaces = enc->indent * INDENT_STEP;	329	int spaces = enc->indent * INDENT_STEP;
228		330
229	need (enc, spaces);	331	need (enc, spaces);
230	memset (enc->cur, ' ', spaces);	332	memset (enc->cur, ' ', spaces);
231	enc->cur += spaces;	333	enc->cur += spaces;
232	}	334	}
233	}	335	}
234		336
235	static void	337	INLINE void
236	encode_space (enc_t *enc)	338	encode_space (enc_t *enc)
237	{	339	{
238	need (enc, 1);	340	need (enc, 1);
239	encode_ch (enc, ' ');	341	encode_ch (enc, ' ');
240	}	342	}
241		343
242	static void	344	INLINE void
243	encode_nl (enc_t *enc)	345	encode_nl (enc_t *enc)
244	{	346	{
245	if (enc->flags & F_INDENT)	347	if (enc->json.flags & F_INDENT)
246	{	348	{
247	need (enc, 1);	349	need (enc, 1);
248	encode_ch (enc, '\n');	350	encode_ch (enc, '\n');
249	}	351	}
250	}	352	}
251		353
252	static void	354	INLINE void
253	encode_comma (enc_t *enc)	355	encode_comma (enc_t *enc)
254	{	356	{
255	encode_ch (enc, ',');	357	encode_ch (enc, ',');
256		358
257	if (enc->flags & F_INDENT)	359	if (enc->json.flags & F_INDENT)
258	encode_nl (enc);	360	encode_nl (enc);
259	else if (enc->flags & F_SPACE_AFTER)	361	else if (enc->json.flags & F_SPACE_AFTER)
260	encode_space (enc);	362	encode_space (enc);
261	}	363	}
262		364
263	static void encode_sv (enc_t *enc, SV *sv);	365	static void encode_sv (enc_t *enc, SV *sv);
264		366
265	static void	367	static void
266	encode_av (enc_t *enc, AV *av)	368	encode_av (enc_t *enc, AV *av)
267	{	369	{
268	int i, len = av_len (av);	370	int i, len = av_len (av);
269		371
270	encode_ch (enc, '['); encode_nl (enc);	372	if (enc->indent >= enc->json.max_depth)
271	++enc->indent;	373	croak (ERR_NESTING_EXCEEDED);
272		374
		375	encode_ch (enc, '[');
		376
		377	if (len >= 0)
		378	{
		379	encode_nl (enc); ++enc->indent;
		380
273	for (i = 0; i <= len; ++i)	381	for (i = 0; i <= len; ++i)
274	{	382	{
		383	SV **svp = av_fetch (av, i, 0);
		384
275	encode_indent (enc);	385	encode_indent (enc);
276	encode_sv (enc, *av_fetch (av, i, 0));
277		386
		387	if (svp)
		388	encode_sv (enc, *svp);
		389	else
		390	encode_str (enc, "null", 4, 0);
		391
278	if (i < len)	392	if (i < len)
279	encode_comma (enc);	393	encode_comma (enc);
280	}	394	}
281		395
		396	encode_nl (enc); --enc->indent; encode_indent (enc);
		397	}
		398
282	encode_nl (enc);	399	encode_ch (enc, ']');
283
284	--enc->indent;
285	encode_indent (enc); encode_ch (enc, ']');
286	}	400	}
287		401
288	static void	402	static void
289	encode_he (enc_t *enc, HE *he)	403	encode_hk (enc_t *enc, HE *he)
290	{	404	{
291	encode_ch (enc, '"');	405	encode_ch (enc, '"');
292		406
293	if (HeKLEN (he) == HEf_SVKEY)	407	if (HeKLEN (he) == HEf_SVKEY)
294	{	408	{
…		…
304	else	418	else
305	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));	419	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));
306		420
307	encode_ch (enc, '"');	421	encode_ch (enc, '"');
308		422
309	if (enc->flags & F_SPACE_BEFORE) encode_space (enc);	423	if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);
310	encode_ch (enc, ':');	424	encode_ch (enc, ':');
311	if (enc->flags & F_SPACE_AFTER ) encode_space (enc);	425	if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);
312	encode_sv (enc, HeVAL (he));
313	}	426	}
314		427
315	// compare hash entries, used when all keys are bytestrings	428	// compare hash entries, used when all keys are bytestrings
316	static int	429	static int
317	he_cmp_fast (const void *a_, const void *b_)	430	he_cmp_fast (const void *a_, const void *b_)
…		…
322	HE *b = *(HE **)b_;	435	HE *b = *(HE **)b_;
323		436
324	STRLEN la = HeKLEN (a);	437	STRLEN la = HeKLEN (a);
325	STRLEN lb = HeKLEN (b);	438	STRLEN lb = HeKLEN (b);
326		439
327	if (!(cmp = memcmp (HeKEY (a), HeKEY (b), la < lb ? la : lb)))	440	if (!(cmp = memcmp (HeKEY (b), HeKEY (a), lb < la ? lb : la)))
328	cmp = la - lb;	441	cmp = lb - la;
329		442
330	return cmp;	443	return cmp;
331	}	444	}
332		445
333	// compare hash entries, used when some keys are sv's or utf-x	446	// compare hash entries, used when some keys are sv's or utf-x
334	static int	447	static int
335	he_cmp_slow (const void *a, const void *b)	448	he_cmp_slow (const void *a, const void *b)
336	{	449	{
337	return sv_cmp (HeSVKEY_force (*(HE **)a), HeSVKEY_force (*(HE **)b));	450	return sv_cmp (HeSVKEY_force (*(HE **)b), HeSVKEY_force (*(HE **)a));
338	}	451	}
339		452
340	static void	453	static void
341	encode_hv (enc_t *enc, HV *hv)	454	encode_hv (enc_t *enc, HV *hv)
342	{	455	{
343	int count, i;	456	HE *he;
344		457
345	encode_ch (enc, '{'); encode_nl (enc); ++enc->indent;	458	if (enc->indent >= enc->json.max_depth)
		459	croak (ERR_NESTING_EXCEEDED);
346		460
347	if ((count = hv_iterinit (hv)))	461	encode_ch (enc, '{');
348	{	462
349	// for canonical output we have to sort by keys first	463	// for canonical output we have to sort by keys first
350	// actually, this is mostly due to the stupid so-called	464	// actually, this is mostly due to the stupid so-called
351	// security workaround added somewhere in 5.8.x.	465	// security workaround added somewhere in 5.8.x
352	// that randomises hash orderings	466	// that randomises hash orderings
353	if (enc->flags & F_CANONICAL)	467	if (enc->json.flags & F_CANONICAL)
		468	{
		469	int count = hv_iterinit (hv);
		470
		471	if (SvMAGICAL (hv))
354	{	472	{
		473	// need to count by iterating. could improve by dynamically building the vector below
		474	// but I don't care for the speed of this special case.
		475	// note also that we will run into undefined behaviour when the two iterations
		476	// do not result in the same count, something I might care for in some later release.
		477
		478	count = 0;
		479	while (hv_iternext (hv))
		480	++count;
		481
		482	hv_iterinit (hv);
		483	}
		484
		485	if (count)
		486	{
		487	int i, fast = 1;
		488	#if defined(__BORLANDC__) || defined(_MSC_VER)
		489	HE **hes = _alloca (count * sizeof (HE));
		490	#else
355	HE *he, *hes [count]; // if your compiler dies here, you need to enable C99 mode	491	HE *hes [count]; // if your compiler dies here, you need to enable C99 mode
356	int fast = 1;	492	#endif
357		493
358	i = 0;	494	i = 0;
359	while ((he = hv_iternext (hv)))	495	while ((he = hv_iternext (hv)))
360	{	496	{
361	hes [i++] = he;	497	hes [i++] = he;
…		…
383		519
384	FREETMPS;	520	FREETMPS;
385	LEAVE;	521	LEAVE;
386	}	522	}
387		523
388	for (i = 0; i < count; ++i)	524	encode_nl (enc); ++enc->indent;
		525
		526	while (count--)
389	{	527	{
390	encode_indent (enc);	528	encode_indent (enc);
		529	he = hes [count];
391	encode_he (enc, hes [i]);	530	encode_hk (enc, he);
		531	encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
392		532
393	if (i < count - 1)	533	if (count)
394	encode_comma (enc);	534	encode_comma (enc);
395	}	535	}
396		536
		537	encode_nl (enc); --enc->indent; encode_indent (enc);
		538	}
		539	}
		540	else
		541	{
		542	if (hv_iterinit (hv) || SvMAGICAL (hv))
		543	if ((he = hv_iternext (hv)))
		544	{
		545	encode_nl (enc); ++enc->indent;
		546
		547	for (;;)
		548	{
397	encode_nl (enc);	549	encode_indent (enc);
		550	encode_hk (enc, he);
		551	encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
		552
		553	if (!(he = hv_iternext (hv)))
		554	break;
		555
		556	encode_comma (enc);
		557	}
		558
		559	encode_nl (enc); --enc->indent; encode_indent (enc);
		560	}
		561	}
		562
		563	encode_ch (enc, '}');
		564	}
		565
		566	// encode objects, arrays and special \0=false and \1=true values.
		567	static void
		568	encode_rv (enc_t *enc, SV *sv)
		569	{
		570	svtype svt;
		571
		572	SvGETMAGIC (sv);
		573	svt = SvTYPE (sv);
		574
		575	if (expect_false (SvOBJECT (sv)))
		576	{
		577	HV *stash = !JSON_SLOW || json_boolean_stash
		578	? json_boolean_stash
		579	: gv_stashpv ("JSON::XS::Boolean", 1);
		580
		581	if (SvSTASH (sv) == stash)
		582	{
		583	if (SvIV (sv))
		584	encode_str (enc, "true", 4, 0);
		585	else
		586	encode_str (enc, "false", 5, 0);
398	}	587	}
399	else	588	else
400	{	589	{
401	SV *sv;	590	#if 0
402	HE *he = hv_iternext (hv);	591	if (0 && sv_derived_from (rv, "JSON::Literal"))
403
404	for (;;)
405	{	592	{
406	encode_indent (enc);	593	// not yet
407	encode_he (enc, he);
408
409	if (!(he = hv_iternext (hv)))
410	break;
411
412	encode_comma (enc);
413	}	594	}
		595	#endif
		596	if (enc->json.flags & F_CONV_BLESSED)
		597	{
		598	// we re-bless the reference to get overload and other niceties right
		599	GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 0);
414		600
		601	if (to_json)
		602	{
		603	dSP;
		604
		605	ENTER; SAVETMPS; PUSHMARK (SP);
		606	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
		607
		608	// calling with G_SCALAR ensures that we always get a 1 return value
		609	PUTBACK;
		610	call_sv ((SV *)GvCV (to_json), G_SCALAR);
		611	SPAGAIN;
		612
		613	// catch this surprisingly common error
		614	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		615	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		616
		617	sv = POPs;
		618	PUTBACK;
		619
415	encode_nl (enc);	620	encode_sv (enc, sv);
		621
		622	FREETMPS; LEAVE;
		623	}
		624	else if (enc->json.flags & F_ALLOW_BLESSED)
		625	encode_str (enc, "null", 4, 0);
		626	else
		627	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
		628	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		629	}
		630	else if (enc->json.flags & F_ALLOW_BLESSED)
		631	encode_str (enc, "null", 4, 0);
		632	else
		633	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",
		634	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
416	}	635	}
417	}	636	}
		637	else if (svt == SVt_PVHV)
		638	encode_hv (enc, (HV *)sv);
		639	else if (svt == SVt_PVAV)
		640	encode_av (enc, (AV *)sv);
		641	else if (svt < SVt_PVAV)
		642	{
		643	STRLEN len = 0;
		644	char *pv = svt ? SvPV (sv, len) : 0;
418		645
419	--enc->indent; encode_indent (enc); encode_ch (enc, '}');	646	if (len == 1 && *pv == '1')
		647	encode_str (enc, "true", 4, 0);
		648	else if (len == 1 && *pv == '0')
		649	encode_str (enc, "false", 5, 0);
		650	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		651	encode_str (enc, "null", 4, 0);
		652	else
		653	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
		654	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		655	}
		656	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		657	encode_str (enc, "null", 4, 0);
		658	else
		659	croak ("encountered %s, but JSON can only represent references to arrays or hashes",
		660	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
420	}	661	}
421		662
422	static void	663	static void
423	encode_sv (enc_t *enc, SV *sv)	664	encode_sv (enc_t *enc, SV *sv)
424	{	665	{
…		…
432	encode_str (enc, str, len, SvUTF8 (sv));	673	encode_str (enc, str, len, SvUTF8 (sv));
433	encode_ch (enc, '"');	674	encode_ch (enc, '"');
434	}	675	}
435	else if (SvNOKp (sv))	676	else if (SvNOKp (sv))
436	{	677	{
		678	// trust that perl will do the right thing w.r.t. JSON syntax.
437	need (enc, NV_DIG + 32);	679	need (enc, NV_DIG + 32);
438	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);	680	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
439	enc->cur += strlen (enc->cur);	681	enc->cur += strlen (enc->cur);
440	}	682	}
441	else if (SvIOKp (sv))	683	else if (SvIOKp (sv))
442	{	684	{
		685	// we assume we can always read an IV as a UV and vice versa
		686	// we assume two's complement
		687	// we assume no aliasing issues in the union
		688	if (SvIsUV (sv) ? SvUVX (sv) <= 59000
		689	: SvIVX (sv) <= 59000 && SvIVX (sv) >= -59000)
		690	{
		691	// optimise the "small number case"
		692	// code will likely be branchless and use only a single multiplication
		693	// works for numbers up to 59074
		694	I32 i = SvIVX (sv);
		695	U32 u;
		696	char digit, nz = 0;
		697
443	need (enc, 64);	698	need (enc, 6);
		699
		700	*enc->cur = '-'; enc->cur += i < 0 ? 1 : 0;
		701	u = i < 0 ? -i : i;
		702
		703	// convert to 4.28 fixed-point representation
		704	u = u * ((0xfffffff + 10000) / 10000); // 10**5, 5 fractional digits
		705
		706	// now output digit by digit, each time masking out the integer part
		707	// and multiplying by 5 while moving the decimal point one to the right,
		708	// resulting in a net multiplication by 10.
		709	// we always write the digit to memory but conditionally increment
		710	// the pointer, to enable the use of conditional move instructions.
		711	digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffffUL) * 5;
		712	digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffffUL) * 5;
		713	digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffffUL) * 5;
		714	digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffffUL) * 5;
		715	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
		716	}
		717	else
		718	{
		719	// large integer, use the (rather slow) snprintf way.
		720	need (enc, IVUV_MAXCHARS);
444	enc->cur +=	721	enc->cur +=
445	SvIsUV(sv)	722	SvIsUV(sv)
446	? snprintf (enc->cur, 64, "%"UVuf, (UV)SvUVX (sv))	723	? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv))
447	: snprintf (enc->cur, 64, "%"IVdf, (IV)SvIVX (sv));	724	: snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv));
		725	}
448	}	726	}
449	else if (SvROK (sv))	727	else if (SvROK (sv))
450	{	728	encode_rv (enc, SvRV (sv));
451	SV *rv = SvRV (sv);	729	else if (!SvOK (sv) || enc->json.flags & F_ALLOW_UNKNOWN)
452
453	if (enc->indent >= enc->max_depth)
454	croak ("data structure too deep (hit recursion limit)");
455
456	switch (SvTYPE (rv))
457	{
458	case SVt_PVAV: encode_av (enc, (AV *)rv); break;
459	case SVt_PVHV: encode_hv (enc, (HV *)rv); break;
460
461	default:
462	croak ("encountered %s, but JSON can only represent references to arrays or hashes",
463	SvPV_nolen (sv));
464	}
465	}
466	else if (!SvOK (sv))
467	encode_str (enc, "null", 4, 0);	730	encode_str (enc, "null", 4, 0);
468	else	731	else
469	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",	732	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",
470	SvPV_nolen (sv), SvFLAGS (sv));	733	SvPV_nolen (sv), SvFLAGS (sv));
471	}	734	}
472		735
473	static SV *	736	static SV *
474	encode_json (SV *scalar, UV flags)	737	encode_json (SV *scalar, JSON *json)
475	{	738	{
		739	enc_t enc;
		740
476	if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar))	741	if (!(json->flags & F_ALLOW_NONREF) && !SvROK (scalar))
477	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");	742	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
478		743
479	enc_t enc;	744	enc.json = *json;
480	enc.flags = flags;
481	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	745	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
482	enc.cur = SvPVX (enc.sv);	746	enc.cur = SvPVX (enc.sv);
483	enc.end = SvEND (enc.sv);	747	enc.end = SvEND (enc.sv);
484	enc.indent = 0;	748	enc.indent = 0;
485	enc.max_depth = 0x7fffffffUL;	749	enc.limit = enc.json.flags & F_ASCII ? 0x000080UL
		750	: enc.json.flags & F_LATIN1 ? 0x000100UL
		751	: 0x110000UL;
486		752
487	SvPOK_only (enc.sv);	753	SvPOK_only (enc.sv);
488	encode_sv (&enc, scalar);	754	encode_sv (&enc, scalar);
489		755
		756	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
		757	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
		758
490	if (!(flags & (F_ASCII | F_UTF8)))	759	if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8)))
491	SvUTF8_on (enc.sv);	760	SvUTF8_on (enc.sv);
492		761
493	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
494
495	if (enc.flags & F_SHRINK)	762	if (enc.json.flags & F_SHRINK)
496	shrink (enc.sv);	763	shrink (enc.sv);
497		764
498	return enc.sv;	765	return enc.sv;
499	}	766	}
500		767
…		…
505	typedef struct	772	typedef struct
506	{	773	{
507	char *cur; // current parser pointer	774	char *cur; // current parser pointer
508	char *end; // end of input string	775	char *end; // end of input string
509	const char *err; // parse error, if != 0	776	const char *err; // parse error, if != 0
510	UV flags; // F_*	777	JSON json;
		778	U32 depth; // recursion depth
		779	U32 maxdepth; // recursion depth limit
511	} dec_t;	780	} dec_t;
512		781
513	static void	782	INLINE void
		783	decode_comment (dec_t *dec)
		784	{
		785	// only '#'-style comments allowed a.t.m.
		786
		787	while (*dec->cur && *dec->cur != 0x0a && *dec->cur != 0x0d)
		788	++dec->cur;
		789	}
		790
		791	INLINE void
514	decode_ws (dec_t *dec)	792	decode_ws (dec_t *dec)
515	{	793	{
516	for (;;)	794	for (;;)
517	{	795	{
518	char ch = *dec->cur;	796	char ch = *dec->cur;
519		797
520	if (ch > 0x20	798	if (ch > 0x20)
		799	{
		800	if (expect_false (ch == '#'))
		801	{
		802	if (dec->json.flags & F_RELAXED)
		803	decode_comment (dec);
		804	else
		805	break;
		806	}
		807	else
		808	break;
		809	}
521	|| (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09))	810	else if (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)
522	break;	811	break; // parse error, but let higher level handle it, gives better error messages
523		812
524	++dec->cur;	813	++dec->cur;
525	}	814	}
526	}	815	}
527		816
528	#define ERR(reason) SB dec->err = reason; goto fail; SE	817	#define ERR(reason) SB dec->err = reason; goto fail; SE
		818
529	#define EXPECT_CH(ch) SB \	819	#define EXPECT_CH(ch) SB \
530	if (*dec->cur != ch) \	820	if (*dec->cur != ch) \
531	ERR (# ch " expected"); \	821	ERR (# ch " expected"); \
532	++dec->cur; \	822	++dec->cur; \
533	SE	823	SE
534		824
		825	#define DEC_INC_DEPTH if (++dec->depth > dec->json.max_depth) ERR (ERR_NESTING_EXCEEDED)
		826	#define DEC_DEC_DEPTH --dec->depth
		827
535	static SV *decode_sv (dec_t *dec);	828	static SV *decode_sv (dec_t *dec);
536		829
537	static signed char decode_hexdigit[256];	830	static signed char decode_hexdigit[256];
538		831
539	static UV	832	static UV
540	decode_4hex (dec_t *dec)	833	decode_4hex (dec_t *dec)
541	{	834	{
542	signed char d1, d2, d3, d4;	835	signed char d1, d2, d3, d4;
543	unsigned char *cur = (unsigned char *)dec->cur;	836	unsigned char *cur = (unsigned char *)dec->cur;
544		837
545	d1 = decode_hexdigit [cur [0]]; if (d1 < 0) ERR ("four hexadecimal digits expected");	838	d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("exactly four hexadecimal digits expected");
546	d2 = decode_hexdigit [cur [1]]; if (d2 < 0) ERR ("four hexadecimal digits expected");	839	d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("exactly four hexadecimal digits expected");
547	d3 = decode_hexdigit [cur [2]]; if (d3 < 0) ERR ("four hexadecimal digits expected");	840	d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("exactly four hexadecimal digits expected");
548	d4 = decode_hexdigit [cur [3]]; if (d4 < 0) ERR ("four hexadecimal digits expected");	841	d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("exactly four hexadecimal digits expected");
549		842
550	dec->cur += 4;	843	dec->cur += 4;
551		844
552	return ((UV)d1) << 12	845	return ((UV)d1) << 12
553	| ((UV)d2) << 8	846	| ((UV)d2) << 8
…		…
561	static SV *	854	static SV *
562	decode_str (dec_t *dec)	855	decode_str (dec_t *dec)
563	{	856	{
564	SV *sv = 0;	857	SV *sv = 0;
565	int utf8 = 0;	858	int utf8 = 0;
		859	char *dec_cur = dec->cur;
566		860
567	do	861	do
568	{	862	{
569	char buf [SHORT_STRING_LEN + UTF8_MAX_LEN];	863	char buf [SHORT_STRING_LEN + UTF8_MAXBYTES];
570	char *cur = buf;	864	char *cur = buf;
571		865
572	do	866	do
573	{	867	{
574	unsigned char ch = *(unsigned char *)dec->cur++;	868	unsigned char ch = *(unsigned char *)dec_cur++;
575		869
576	if (ch == '"')	870	if (expect_false (ch == '"'))
577	{	871	{
578	--dec->cur;	872	--dec_cur;
579	break;	873	break;
580	}	874	}
581	else if (ch == '\\')	875	else if (expect_false (ch == '\\'))
582	{	876	{
583	switch (*dec->cur)	877	switch (*dec_cur)
584	{	878	{
585	case '\\':	879	case '\\':
586	case '/':	880	case '/':
587	case '"': *cur++ = *dec->cur++; break;	881	case '"': *cur++ = *dec_cur++; break;
588		882
589	case 'b': ++dec->cur; *cur++ = '\010'; break;	883	case 'b': ++dec_cur; *cur++ = '\010'; break;
590	case 't': ++dec->cur; *cur++ = '\011'; break;	884	case 't': ++dec_cur; *cur++ = '\011'; break;
591	case 'n': ++dec->cur; *cur++ = '\012'; break;	885	case 'n': ++dec_cur; *cur++ = '\012'; break;
592	case 'f': ++dec->cur; *cur++ = '\014'; break;	886	case 'f': ++dec_cur; *cur++ = '\014'; break;
593	case 'r': ++dec->cur; *cur++ = '\015'; break;	887	case 'r': ++dec_cur; *cur++ = '\015'; break;
594		888
595	case 'u':	889	case 'u':
596	{	890	{
597	UV lo, hi;	891	UV lo, hi;
598	++dec->cur;	892	++dec_cur;
599		893
		894	dec->cur = dec_cur;
600	hi = decode_4hex (dec);	895	hi = decode_4hex (dec);
		896	dec_cur = dec->cur;
601	if (hi == (UV)-1)	897	if (hi == (UV)-1)
602	goto fail;	898	goto fail;
603		899
604	// possibly a surrogate pair	900	// possibly a surrogate pair
605	if (hi >= 0xd800)	901	if (hi >= 0xd800)
606	if (hi < 0xdc00)	902	if (hi < 0xdc00)
607	{	903	{
608	if (dec->cur [0] != '\\' || dec->cur [1] != 'u')	904	if (dec_cur [0] != '\\' || dec_cur [1] != 'u')
609	ERR ("missing low surrogate character in surrogate pair");	905	ERR ("missing low surrogate character in surrogate pair");
610		906
611	dec->cur += 2;	907	dec_cur += 2;
612		908
		909	dec->cur = dec_cur;
613	lo = decode_4hex (dec);	910	lo = decode_4hex (dec);
		911	dec_cur = dec->cur;
614	if (lo == (UV)-1)	912	if (lo == (UV)-1)
615	goto fail;	913	goto fail;
616		914
617	if (lo < 0xdc00 || lo >= 0xe000)	915	if (lo < 0xdc00 || lo >= 0xe000)
618	ERR ("surrogate pair expected");	916	ERR ("surrogate pair expected");
…		…
624		922
625	if (hi >= 0x80)	923	if (hi >= 0x80)
626	{	924	{
627	utf8 = 1;	925	utf8 = 1;
628		926
629	cur = (char *)uvuni_to_utf8_flags (cur, hi, 0);	927	cur = encode_utf8 (cur, hi);
630	}	928	}
631	else	929	else
632	*cur++ = hi;	930	*cur++ = hi;
633	}	931	}
634	break;	932	break;
635		933
636	default:	934	default:
637	--dec->cur;	935	--dec_cur;
638	ERR ("illegal backslash escape sequence in string");	936	ERR ("illegal backslash escape sequence in string");
639	}	937	}
640	}	938	}
641	else if (ch >= 0x20 && ch <= 0x7f)	939	else if (expect_true (ch >= 0x20 && ch < 0x80))
642	*cur++ = ch;	940	*cur++ = ch;
643	else if (ch >= 0x80)	941	else if (ch >= 0x80)
644	{	942	{
645	--dec->cur;
646
647	STRLEN clen;	943	STRLEN clen;
		944	UV uch;
		945
		946	--dec_cur;
		947
648	UV uch = decode_utf8 (dec->cur, dec->end - dec->cur, &clen);	948	uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
649	if (clen == (STRLEN)-1)	949	if (clen == (STRLEN)-1)
650	ERR ("malformed UTF-8 character in JSON string");	950	ERR ("malformed UTF-8 character in JSON string");
651		951
652	do	952	do
653	{
654	*cur++ = *dec->cur++;	953	*cur++ = *dec_cur++;
655	}
656	while (--clen);	954	while (--clen);
657		955
658	utf8 = 1;	956	utf8 = 1;
659	}	957	}
660	else if (!ch)
661	ERR ("unexpected end of string while parsing json string");
662	else	958	else
		959	{
		960	--dec_cur;
		961
		962	if (!ch)
		963	ERR ("unexpected end of string while parsing JSON string");
		964	else
663	ERR ("invalid character encountered");	965	ERR ("invalid character encountered while parsing JSON string");
664		966	}
665	}	967	}
666	while (cur < buf + SHORT_STRING_LEN);	968	while (cur < buf + SHORT_STRING_LEN);
667		969
		970	{
668	STRLEN len = cur - buf;	971	STRLEN len = cur - buf;
669		972
670	if (sv)	973	if (sv)
671	{	974	{
672	SvGROW (sv, SvCUR (sv) + len + 1);	975	STRLEN cur = SvCUR (sv);
		976
		977	if (SvLEN (sv) <= cur + len)
		978	SvGROW (sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
		979
673	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);	980	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);
674	SvCUR_set (sv, SvCUR (sv) + len);	981	SvCUR_set (sv, SvCUR (sv) + len);
675	}	982	}
676	else	983	else
677	sv = newSVpvn (buf, len);	984	sv = newSVpvn (buf, len);
678	}	985	}
		986	}
679	while (*dec->cur != '"');	987	while (*dec_cur != '"');
680		988
681	++dec->cur;	989	++dec_cur;
682		990
683	if (sv)	991	if (sv)
684	{	992	{
685	SvPOK_only (sv);	993	SvPOK_only (sv);
686	*SvEND (sv) = 0;	994	*SvEND (sv) = 0;
…		…
689	SvUTF8_on (sv);	997	SvUTF8_on (sv);
690	}	998	}
691	else	999	else
692	sv = newSVpvn ("", 0);	1000	sv = newSVpvn ("", 0);
693		1001
		1002	dec->cur = dec_cur;
694	return sv;	1003	return sv;
695		1004
696	fail:	1005	fail:
		1006	dec->cur = dec_cur;
697	return 0;	1007	return 0;
698	}	1008	}
699		1009
700	static SV *	1010	static SV *
701	decode_num (dec_t *dec)	1011	decode_num (dec_t *dec)
…		…
759	is_nv = 1;	1069	is_nv = 1;
760	}	1070	}
761		1071
762	if (!is_nv)	1072	if (!is_nv)
763	{	1073	{
764	UV uv;	1074	int len = dec->cur - start;
765	int numtype = grok_number (start, dec->cur - start, &uv);	1075
766	if (numtype & IS_NUMBER_IN_UV)	1076	// special case the rather common 1..5-digit-int case
767	if (numtype & IS_NUMBER_NEG)	1077	if (*start == '-')
		1078	switch (len)
768	{	1079	{
769	if (uv < (UV)IV_MIN)	1080	case 2: return newSViv (-( start [1] - '0' * 1));
770	return newSViv (-(IV)uv);	1081	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));
		1082	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
		1083	case 5: return newSViv (-( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
		1084	case 6: return newSViv (-(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));
771	}	1085	}
		1086	else
		1087	switch (len)
		1088	{
		1089	case 1: return newSViv ( start [0] - '0' * 1);
		1090	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
		1091	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
		1092	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
		1093	case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);
		1094	}
		1095
		1096	{
		1097	UV uv;
		1098	int numtype = grok_number (start, len, &uv);
		1099	if (numtype & IS_NUMBER_IN_UV)
		1100	if (numtype & IS_NUMBER_NEG)
		1101	{
		1102	if (uv < (UV)IV_MIN)
		1103	return newSViv (-(IV)uv);
		1104	}
772	else	1105	else
773	return newSVuv (uv);	1106	return newSVuv (uv);
774	}	1107	}
775		1108
		1109	len -= *start == '-' ? 1 : 0;
		1110
		1111	// does not fit into IV or UV, try NV
		1112	if ((sizeof (NV) == sizeof (double) && DBL_DIG >= len)
		1113	#if defined (LDBL_DIG)
		1114	|| (sizeof (NV) == sizeof (long double) && LDBL_DIG >= len)
		1115	#endif
		1116	)
		1117	// fits into NV without loss of precision
		1118	return newSVnv (Atof (start));
		1119
		1120	// everything else fails, convert it to a string
		1121	return newSVpvn (start, dec->cur - start);
		1122	}
		1123
		1124	// loss of precision here
776	return newSVnv (Atof (start));	1125	return newSVnv (Atof (start));
777		1126
778	fail:	1127	fail:
779	return 0;	1128	return 0;
780	}	1129	}
…		…
782	static SV *	1131	static SV *
783	decode_av (dec_t *dec)	1132	decode_av (dec_t *dec)
784	{	1133	{
785	AV *av = newAV ();	1134	AV *av = newAV ();
786		1135
		1136	DEC_INC_DEPTH;
787	decode_ws (dec);	1137	decode_ws (dec);
		1138
788	if (*dec->cur == ']')	1139	if (*dec->cur == ']')
789	++dec->cur;	1140	++dec->cur;
790	else	1141	else
791	for (;;)	1142	for (;;)
792	{	1143	{
…		…
808		1159
809	if (*dec->cur != ',')	1160	if (*dec->cur != ',')
810	ERR (", or ] expected while parsing array");	1161	ERR (", or ] expected while parsing array");
811		1162
812	++dec->cur;	1163	++dec->cur;
		1164
		1165	decode_ws (dec);
		1166
		1167	if (*dec->cur == ']' && dec->json.flags & F_RELAXED)
		1168	{
		1169	++dec->cur;
		1170	break;
		1171	}
813	}	1172	}
814		1173
		1174	DEC_DEC_DEPTH;
815	return newRV_noinc ((SV *)av);	1175	return newRV_noinc ((SV *)av);
816		1176
817	fail:	1177	fail:
818	SvREFCNT_dec (av);	1178	SvREFCNT_dec (av);
		1179	DEC_DEC_DEPTH;
819	return 0;	1180	return 0;
820	}	1181	}
821		1182
822	static SV *	1183	static SV *
823	decode_hv (dec_t *dec)	1184	decode_hv (dec_t *dec)
824	{	1185	{
		1186	SV *sv;
825	HV *hv = newHV ();	1187	HV *hv = newHV ();
826		1188
		1189	DEC_INC_DEPTH;
827	decode_ws (dec);	1190	decode_ws (dec);
		1191
828	if (*dec->cur == '}')	1192	if (*dec->cur == '}')
829	++dec->cur;	1193	++dec->cur;
830	else	1194	else
831	for (;;)	1195	for (;;)
832	{	1196	{
		1197	EXPECT_CH ('"');
		1198
		1199	// heuristic: assume that
		1200	// a) decode_str + hv_store_ent are abysmally slow.
		1201	// b) most hash keys are short, simple ascii text.
		1202	// => try to "fast-match" such strings to avoid
		1203	// the overhead of decode_str + hv_store_ent.
		1204	{
833	SV *key, *value;	1205	SV *value;
		1206	char *p = dec->cur;
		1207	char *e = p + 24; // only try up to 24 bytes
834		1208
835	decode_ws (dec); EXPECT_CH ('"');	1209	for (;;)
836
837	key = decode_str (dec);
838	if (!key)
839	goto fail;
840
841	decode_ws (dec); EXPECT_CH (':');
842
843	value = decode_sv (dec);
844	if (!value)
845	{	1210	{
		1211	// the >= 0x80 is false on most architectures
		1212	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
		1213	{
		1214	// slow path, back up and use decode_str
		1215	SV *key = decode_str (dec);
		1216	if (!key)
		1217	goto fail;
		1218
		1219	decode_ws (dec); EXPECT_CH (':');
		1220
		1221	decode_ws (dec);
		1222	value = decode_sv (dec);
		1223	if (!value)
		1224	{
		1225	SvREFCNT_dec (key);
		1226	goto fail;
		1227	}
		1228
		1229	hv_store_ent (hv, key, value, 0);
846	SvREFCNT_dec (key);	1230	SvREFCNT_dec (key);
		1231
		1232	break;
		1233	}
		1234	else if (*p == '"')
		1235	{
		1236	// fast path, got a simple key
		1237	char *key = dec->cur;
		1238	int len = p - key;
		1239	dec->cur = p + 1;
		1240
		1241	decode_ws (dec); EXPECT_CH (':');
		1242
		1243	decode_ws (dec);
		1244	value = decode_sv (dec);
		1245	if (!value)
847	goto fail;	1246	goto fail;
		1247
		1248	hv_store (hv, key, len, value, 0);
		1249
		1250	break;
		1251	}
		1252
		1253	++p;
848	}	1254	}
849		1255	}
850	//TODO: optimise
851	hv_store_ent (hv, key, value, 0);
852		1256
853	decode_ws (dec);	1257	decode_ws (dec);
854		1258
855	if (*dec->cur == '}')	1259	if (*dec->cur == '}')
856	{	1260	{
…		…
860		1264
861	if (*dec->cur != ',')	1265	if (*dec->cur != ',')
862	ERR (", or } expected while parsing object/hash");	1266	ERR (", or } expected while parsing object/hash");
863		1267
864	++dec->cur;	1268	++dec->cur;
		1269
		1270	decode_ws (dec);
		1271
		1272	if (*dec->cur == '}' && dec->json.flags & F_RELAXED)
		1273	{
		1274	++dec->cur;
		1275	break;
		1276	}
865	}	1277	}
866		1278
		1279	DEC_DEC_DEPTH;
867	return newRV_noinc ((SV *)hv);	1280	sv = newRV_noinc ((SV *)hv);
		1281
		1282	// check filter callbacks
		1283	if (dec->json.flags & F_HOOK)
		1284	{
		1285	if (dec->json.cb_sk_object && HvKEYS (hv) == 1)
		1286	{
		1287	HE *cb, *he;
		1288
		1289	hv_iterinit (hv);
		1290	he = hv_iternext (hv);
		1291	hv_iterinit (hv);
		1292
		1293	// the next line creates a mortal sv each time its called.
		1294	// might want to optimise this for common cases.
		1295	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);
		1296
		1297	if (cb)
		1298	{
		1299	dSP;
		1300	int count;
		1301
		1302	ENTER; SAVETMPS; PUSHMARK (SP);
		1303	XPUSHs (HeVAL (he));
		1304
		1305	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
		1306
		1307	if (count == 1)
		1308	{
		1309	sv = newSVsv (POPs);
		1310	FREETMPS; LEAVE;
		1311	return sv;
		1312	}
		1313
		1314	FREETMPS; LEAVE;
		1315	}
		1316	}
		1317
		1318	if (dec->json.cb_object)
		1319	{
		1320	dSP;
		1321	int count;
		1322
		1323	ENTER; SAVETMPS; PUSHMARK (SP);
		1324	XPUSHs (sv_2mortal (sv));
		1325
		1326	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;
		1327
		1328	if (count == 1)
		1329	{
		1330	sv = newSVsv (POPs);
		1331	FREETMPS; LEAVE;
		1332	return sv;
		1333	}
		1334
		1335	SvREFCNT_inc (sv);
		1336	FREETMPS; LEAVE;
		1337	}
		1338	}
		1339
		1340	return sv;
868		1341
869	fail:	1342	fail:
870	SvREFCNT_dec (hv);	1343	SvREFCNT_dec (hv);
		1344	DEC_DEC_DEPTH;
871	return 0;	1345	return 0;
872	}	1346	}
873		1347
874	static SV *	1348	static SV *
875	decode_sv (dec_t *dec)	1349	decode_sv (dec_t *dec)
876	{	1350	{
877	decode_ws (dec);	1351	// the beauty of JSON: you need exactly one character lookahead
		1352	// to parse everything.
878	switch (*dec->cur)	1353	switch (*dec->cur)
879	{	1354	{
880	case '"': ++dec->cur; return decode_str (dec);	1355	case '"': ++dec->cur; return decode_str (dec);
881	case '[': ++dec->cur; return decode_av (dec);	1356	case '[': ++dec->cur; return decode_av (dec);
882	case '{': ++dec->cur; return decode_hv (dec);	1357	case '{': ++dec->cur; return decode_hv (dec);
883		1358
884	case '-':	1359	case '-':
885	case '0': case '1': case '2': case '3': case '4':	1360	case '0': case '1': case '2': case '3': case '4':
886	case '5': case '6': case '7': case '8': case '9':	1361	case '5': case '6': case '7': case '8': case '9':
887	return decode_num (dec);	1362	return decode_num (dec);
888		1363
889	case 't':	1364	case 't':
890	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1365	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
891	{	1366	{
892	dec->cur += 4;	1367	dec->cur += 4;
		1368	#if JSON_SLOW
		1369	json_true = get_bool ("JSON::XS::true");
		1370	#endif
893	return newSViv (1);	1371	return newSVsv (json_true);
894	}	1372	}
895	else	1373	else
896	ERR ("'true' expected");	1374	ERR ("'true' expected");
897		1375
898	break;	1376	break;
899		1377
900	case 'f':	1378	case 'f':
901	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))	1379	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
902	{	1380	{
903	dec->cur += 5;	1381	dec->cur += 5;
		1382	#if JSON_SLOW
		1383	json_false = get_bool ("JSON::XS::false");
		1384	#endif
904	return newSViv (0);	1385	return newSVsv (json_false);
905	}	1386	}
906	else	1387	else
907	ERR ("'false' expected");	1388	ERR ("'false' expected");
908		1389
909	break;	1390	break;
…		…
918	ERR ("'null' expected");	1399	ERR ("'null' expected");
919		1400
920	break;	1401	break;
921		1402
922	default:	1403	default:
923	ERR ("malformed json string, neither array, object, number, string or atom");	1404	ERR ("malformed JSON string, neither array, object, number, string or atom");
924	break;	1405	break;
925	}	1406	}
926		1407
927	fail:	1408	fail:
928	return 0;	1409	return 0;
929	}	1410	}
930		1411
931	static SV *	1412	static SV *
932	decode_json (SV *string, UV flags)	1413	decode_json (SV *string, JSON *json, STRLEN *offset_return)
933	{	1414	{
		1415	dec_t dec;
		1416	STRLEN offset;
934	SV *sv;	1417	SV *sv;
935		1418
		1419	/* work around bugs in 5.10 where manipulating magic values
		1420	* will perl ignore the magic in subsequent accesses
		1421	*/
		1422	/*SvGETMAGIC (string);*/
		1423	if (SvMAGICAL (string))
		1424	string = sv_2mortal (newSVsv (string));
		1425
		1426	SvUPGRADE (string, SVt_PV);
		1427
		1428	/* work around a bug in perl 5.10, which causes SvCUR to fail an
		1429	* assertion with -DDEBUGGING, although SvCUR is documented to
		1430	* return the xpv_cur field which certainly exists after upgrading.
		1431	* according to nicholas clark, calling SvPOK fixes this.
		1432	* But it doesn't fix it, so try another workaround, call SvPV_nolen
		1433	* and hope for the best.
		1434	* Damnit, SvPV_nolen still trips over yet another assertion. This
		1435	* assertion business is seriously broken, try yet another workaround
		1436	* for the broken -DDEBUGGING.
		1437	*/
		1438	#ifdef DEBUGGING
		1439	offset = SvOK (string) ? sv_len (string) : 0;
		1440	#else
		1441	offset = SvCUR (string);
		1442	#endif
		1443
		1444	if (offset > json->max_size && json->max_size)
		1445	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		1446	(unsigned long)SvCUR (string), (unsigned long)json->max_size);
		1447
936	if (flags & F_UTF8)	1448	if (json->flags & F_UTF8)
937	sv_utf8_downgrade (string, 0);	1449	sv_utf8_downgrade (string, 0);
938	else	1450	else
939	sv_utf8_upgrade (string);	1451	sv_utf8_upgrade (string);
940		1452
941	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1453	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
942		1454
943	dec_t dec;	1455	dec.json = *json;
944	dec.flags = flags;
945	dec.cur = SvPVX (string);	1456	dec.cur = SvPVX (string);
946	dec.end = SvEND (string);	1457	dec.end = SvEND (string);
947	dec.err = 0;	1458	dec.err = 0;
		1459	dec.depth = 0;
948		1460
		1461	if (dec.json.cb_object || dec.json.cb_sk_object)
		1462	dec.json.flags |= F_HOOK;
		1463
		1464	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
		1465
		1466	decode_ws (&dec);
949	sv = decode_sv (&dec);	1467	sv = decode_sv (&dec);
950		1468
		1469	if (!(offset_return || !sv))
		1470	{
		1471	// check for trailing garbage
		1472	decode_ws (&dec);
		1473
		1474	if (*dec.cur)
		1475	{
		1476	dec.err = "garbage after JSON object";
		1477	SvREFCNT_dec (sv);
		1478	sv = 0;
		1479	}
		1480	}
		1481
		1482	if (offset_return || !sv)
		1483	{
		1484	offset = dec.json.flags & F_UTF8
		1485	? dec.cur - SvPVX (string)
		1486	: utf8_distance (dec.cur, SvPVX (string));
		1487
		1488	if (offset_return)
		1489	*offset_return = offset;
		1490	}
		1491
951	if (!sv)	1492	if (!sv)
952	{	1493	{
953	IV offset = dec.flags & F_UTF8
954	? dec.cur - SvPVX (string)
955	: utf8_distance (dec.cur, SvPVX (string));
956	SV *uni = sv_newmortal ();	1494	SV *uni = sv_newmortal ();
957		1495
958	// horrible hack to silence warning inside pv_uni_display	1496	// horrible hack to silence warning inside pv_uni_display
959	COP cop = *PL_curcop;	1497	COP cop = *PL_curcop;
960	cop.cop_warnings = pWARN_NONE;	1498	cop.cop_warnings = pWARN_NONE;
…		…
962	SAVEVPTR (PL_curcop);	1500	SAVEVPTR (PL_curcop);
963	PL_curcop = &cop;	1501	PL_curcop = &cop;
964	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);	1502	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);
965	LEAVE;	1503	LEAVE;
966		1504
967	croak ("%s, at character offset %d (%s)",	1505	croak ("%s, at character offset %d [\"%s\"]",
968	dec.err,	1506	dec.err,
969	(int)offset,	1507	(int)offset,
970	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1508	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
971	}	1509	}
972		1510
973	sv = sv_2mortal (sv);	1511	sv = sv_2mortal (sv);
974		1512
975	if (!(dec.flags & F_ALLOW_NONREF) && !SvROK (sv))	1513	if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))
976	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");	1514	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
977		1515
978	return sv;	1516	return sv;
		1517	}
		1518
		1519	/////////////////////////////////////////////////////////////////////////////
		1520	// incremental parser
		1521
		1522	static void
		1523	incr_parse (JSON *self)
		1524	{
		1525	const char *p = SvPVX (self->incr_text) + self->incr_pos;
		1526
		1527	for (;;)
		1528	{
		1529	//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
		1530	switch (self->incr_mode)
		1531	{
		1532	// only used for intiial whitespace skipping
		1533	case INCR_M_WS:
		1534	for (;;)
		1535	{
		1536	if (*p > 0x20)
		1537	{
		1538	self->incr_mode = INCR_M_JSON;
		1539	goto incr_m_json;
		1540	}
		1541	else if (!*p)
		1542	goto interrupt;
		1543
		1544	++p;
		1545	}
		1546
		1547	// skip a single char inside a string (for \\-processing)
		1548	case INCR_M_BS:
		1549	if (!*p)
		1550	goto interrupt;
		1551
		1552	++p;
		1553	self->incr_mode = INCR_M_STR;
		1554	goto incr_m_str;
		1555
		1556	// inside a string
		1557	case INCR_M_STR:
		1558	incr_m_str:
		1559	for (;;)
		1560	{
		1561	if (*p == '"')
		1562	{
		1563	++p;
		1564	self->incr_mode = INCR_M_JSON;
		1565
		1566	if (!self->incr_nest)
		1567	goto interrupt;
		1568
		1569	goto incr_m_json;
		1570	}
		1571	else if (*p == '\\')
		1572	{
		1573	++p; // "virtually" consumes character after \
		1574
		1575	if (!*p) // if at end of string we have to switch modes
		1576	{
		1577	self->incr_mode = INCR_M_BS;
		1578	goto interrupt;
		1579	}
		1580	}
		1581	else if (!*p)
		1582	goto interrupt;
		1583
		1584	++p;
		1585	}
		1586
		1587	// after initial ws, outside string
		1588	case INCR_M_JSON:
		1589	incr_m_json:
		1590	for (;;)
		1591	{
		1592	switch (*p++)
		1593	{
		1594	case 0:
		1595	--p;
		1596	goto interrupt;
		1597
		1598	case 0x09:
		1599	case 0x0a:
		1600	case 0x0d:
		1601	case 0x20:
		1602	if (!self->incr_nest)
		1603	{
		1604	--p; // do not eat the whitespace, let the next round do it
		1605	goto interrupt;
		1606	}
		1607	break;
		1608
		1609	case '"':
		1610	self->incr_mode = INCR_M_STR;
		1611	goto incr_m_str;
		1612
		1613	case '[':
		1614	case '{':
		1615	if (++self->incr_nest > self->max_depth)
		1616	croak (ERR_NESTING_EXCEEDED);
		1617	break;
		1618
		1619	case ']':
		1620	case '}':
		1621	if (--self->incr_nest <= 0)
		1622	goto interrupt;
		1623	}
		1624	}
		1625	}
		1626
		1627	modechange:
		1628	;
		1629	}
		1630
		1631	interrupt:
		1632	self->incr_pos = p - SvPVX (self->incr_text);
		1633	//printf ("return pos %d mode %d nest %d\n", self->incr_pos, self->incr_mode, self->incr_nest);//D
979	}	1634	}
980		1635
981	/////////////////////////////////////////////////////////////////////////////	1636	/////////////////////////////////////////////////////////////////////////////
982	// XS interface functions	1637	// XS interface functions
983		1638
…		…
985		1640
986	BOOT:	1641	BOOT:
987	{	1642	{
988	int i;	1643	int i;
989		1644
990	memset (decode_hexdigit, 0xff, 256);
991	for (i = 10; i--; )	1645	for (i = 0; i < 256; ++i)
992	decode_hexdigit ['0' + i] = i;	1646	decode_hexdigit [i] =
		1647	i >= '0' && i <= '9' ? i - '0'
		1648	: i >= 'a' && i <= 'f' ? i - 'a' + 10
		1649	: i >= 'A' && i <= 'F' ? i - 'A' + 10
		1650	: -1;
993		1651
994	for (i = 7; i--; )
995	{
996	decode_hexdigit ['a' + i] = 10 + i;
997	decode_hexdigit ['A' + i] = 10 + i;
998	}
999
1000	json_stash = gv_stashpv ("JSON::XS", 1);	1652	json_stash = gv_stashpv ("JSON::XS" , 1);
		1653	json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);
		1654
		1655	json_true = get_bool ("JSON::XS::true");
		1656	json_false = get_bool ("JSON::XS::false");
1001	}	1657	}
1002		1658
1003	PROTOTYPES: DISABLE	1659	PROTOTYPES: DISABLE
1004		1660
1005	SV *new (char *dummy)	1661	void CLONE (...)
1006	CODE:	1662	CODE:
1007	RETVAL = sv_bless (newRV_noinc (newSVuv (F_DEFAULT)), json_stash);	1663	json_stash = 0;
		1664	json_boolean_stash = 0;
		1665
		1666	void new (char *klass)
		1667	PPCODE:
		1668	{
		1669	SV *pv = NEWSV (0, sizeof (JSON));
		1670	SvPOK_only (pv);
		1671	json_init ((JSON *)SvPVX (pv));
		1672	XPUSHs (sv_2mortal (sv_bless (
		1673	newRV_noinc (pv),
		1674	strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)
		1675	)));
		1676	}
		1677
		1678	void ascii (JSON *self, int enable = 1)
		1679	ALIAS:
		1680	ascii = F_ASCII
		1681	latin1 = F_LATIN1
		1682	utf8 = F_UTF8
		1683	indent = F_INDENT
		1684	canonical = F_CANONICAL
		1685	space_before = F_SPACE_BEFORE
		1686	space_after = F_SPACE_AFTER
		1687	pretty = F_PRETTY
		1688	allow_nonref = F_ALLOW_NONREF
		1689	shrink = F_SHRINK
		1690	allow_blessed = F_ALLOW_BLESSED
		1691	convert_blessed = F_CONV_BLESSED
		1692	relaxed = F_RELAXED
		1693	allow_unknown = F_ALLOW_UNKNOWN
		1694	PPCODE:
		1695	{
		1696	if (enable)
		1697	self->flags |= ix;
		1698	else
		1699	self->flags &= ~ix;
		1700
		1701	XPUSHs (ST (0));
		1702	}
		1703
		1704	void get_ascii (JSON *self)
		1705	ALIAS:
		1706	get_ascii = F_ASCII
		1707	get_latin1 = F_LATIN1
		1708	get_utf8 = F_UTF8
		1709	get_indent = F_INDENT
		1710	get_canonical = F_CANONICAL
		1711	get_space_before = F_SPACE_BEFORE
		1712	get_space_after = F_SPACE_AFTER
		1713	get_allow_nonref = F_ALLOW_NONREF
		1714	get_shrink = F_SHRINK
		1715	get_allow_blessed = F_ALLOW_BLESSED
		1716	get_convert_blessed = F_CONV_BLESSED
		1717	get_relaxed = F_RELAXED
		1718	get_allow_unknown = F_ALLOW_UNKNOWN
		1719	PPCODE:
		1720	XPUSHs (boolSV (self->flags & ix));
		1721
		1722	void max_depth (JSON *self, U32 max_depth = 0x80000000UL)
		1723	PPCODE:
		1724	self->max_depth = max_depth;
		1725	XPUSHs (ST (0));
		1726
		1727	U32 get_max_depth (JSON *self)
		1728	CODE:
		1729	RETVAL = self->max_depth;
1008	OUTPUT:	1730	OUTPUT:
1009	RETVAL	1731	RETVAL
1010		1732
1011	SV *ascii (SV *self, int enable = 1)	1733	void max_size (JSON *self, U32 max_size = 0)
1012	ALIAS:	1734	PPCODE:
1013	ascii = F_ASCII	1735	self->max_size = max_size;
1014	utf8 = F_UTF8	1736	XPUSHs (ST (0));
1015	indent = F_INDENT	1737
1016	canonical = F_CANONICAL	1738	int get_max_size (JSON *self)
1017	space_before = F_SPACE_BEFORE
1018	space_after = F_SPACE_AFTER
1019	pretty = F_PRETTY
1020	allow_nonref = F_ALLOW_NONREF
1021	shrink = F_SHRINK
1022	CODE:	1739	CODE:
1023	{	1740	RETVAL = self->max_size;
1024	UV *uv = SvJSON (self);
1025	if (enable)
1026	*uv |= ix;
1027	else
1028	*uv &= ~ix;
1029
1030	RETVAL = newSVsv (self);
1031	}
1032	OUTPUT:	1741	OUTPUT:
1033	RETVAL	1742	RETVAL
1034		1743
1035	void encode (SV *self, SV *scalar)	1744	void filter_json_object (JSON *self, SV *cb = &PL_sv_undef)
1036	PPCODE:	1745	PPCODE:
1037	XPUSHs (encode_json (scalar, *SvJSON (self)));	1746	{
		1747	SvREFCNT_dec (self->cb_object);
		1748	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;
1038		1749
1039	void decode (SV *self, SV *jsonstr)	1750	XPUSHs (ST (0));
		1751	}
		1752
		1753	void filter_json_single_key_object (JSON *self, SV *key, SV *cb = &PL_sv_undef)
1040	PPCODE:	1754	PPCODE:
		1755	{
		1756	if (!self->cb_sk_object)
		1757	self->cb_sk_object = newHV ();
		1758
		1759	if (SvOK (cb))
		1760	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
		1761	else
		1762	{
		1763	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
		1764
		1765	if (!HvKEYS (self->cb_sk_object))
		1766	{
		1767	SvREFCNT_dec (self->cb_sk_object);
		1768	self->cb_sk_object = 0;
		1769	}
		1770	}
		1771
		1772	XPUSHs (ST (0));
		1773	}
		1774
		1775	void encode (JSON *self, SV *scalar)
		1776	PPCODE:
		1777	XPUSHs (encode_json (scalar, self));
		1778
		1779	void decode (JSON *self, SV *jsonstr)
		1780	PPCODE:
1041	XPUSHs (decode_json (jsonstr, *SvJSON (self)));	1781	XPUSHs (decode_json (jsonstr, self, 0));
		1782
		1783	void decode_prefix (JSON *self, SV *jsonstr)
		1784	PPCODE:
		1785	{
		1786	STRLEN offset;
		1787	EXTEND (SP, 2);
		1788	PUSHs (decode_json (jsonstr, self, &offset));
		1789	PUSHs (sv_2mortal (newSVuv (offset)));
		1790	}
		1791
		1792	void incr_parse (JSON *self, SV *jsonstr = 0)
		1793	PPCODE:
		1794	{
		1795	if (!self->incr_text)
		1796	self->incr_text = newSVpvn ("", 0);
		1797
		1798	// append data, if any
		1799	if (jsonstr)
		1800	{
		1801	if (SvUTF8 (jsonstr) && !SvUTF8 (self->incr_text))
		1802	{
		1803	/* utf-8-ness differs, need to upgrade */
		1804	sv_utf8_upgrade (self->incr_text);
		1805
		1806	if (self->incr_pos)
		1807	self->incr_pos = utf8_hop ((U8 *)SvPVX (self->incr_text), self->incr_pos)
		1808	- (U8 *)SvPVX (self->incr_text);
		1809	}
		1810
		1811	{
		1812	STRLEN len;
		1813	const char *str = SvPV (jsonstr, len);
		1814	STRLEN cur = SvCUR (self->incr_text);
		1815
		1816	if (SvLEN (self->incr_text) <= cur + len)
		1817	SvGROW (self->incr_text, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
		1818
		1819	Move (str, SvEND (self->incr_text), len, char);
		1820	SvCUR_set (self->incr_text, SvCUR (self->incr_text) + len);
		1821	*SvEND (self->incr_text) = 0; // this should basically be a nop, too, but make sure it's there
		1822	}
		1823	}
		1824
		1825	if (GIMME_V != G_VOID)
		1826	do
		1827	{
		1828	STRLEN offset;
		1829
		1830	if (!INCR_DONE (self))
		1831	{
		1832	incr_parse (self);
		1833
		1834	if (self->incr_pos > self->max_size && self->max_size)
		1835	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		1836	(unsigned long)self->incr_pos, (unsigned long)self->max_size);
		1837
		1838	if (!INCR_DONE (self))
		1839	break;
		1840	}
		1841
		1842	XPUSHs (decode_json (self->incr_text, self, &offset));
		1843
		1844	sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + offset);
		1845	self->incr_pos -= offset;
		1846	self->incr_nest = 0;
		1847	self->incr_mode = 0;
		1848	}
		1849	while (GIMME_V == G_ARRAY);
		1850	}
		1851
		1852	SV *incr_text (JSON *self)
		1853	ATTRS: lvalue
		1854	CODE:
		1855	{
		1856	if (self->incr_pos)
		1857	croak ("incr_text can not be called when the incremental parser already started parsing");
		1858
		1859	RETVAL = self->incr_text ? SvREFCNT_inc (self->incr_text) : &PL_sv_undef;
		1860	}
		1861	OUTPUT:
		1862	RETVAL
		1863
		1864	void incr_skip (JSON *self)
		1865	CODE:
		1866	{
		1867	if (self->incr_pos)
		1868	{
		1869	sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + self->incr_pos);
		1870	self->incr_pos = 0;
		1871	self->incr_nest = 0;
		1872	self->incr_mode = 0;
		1873	}
		1874	}
		1875
		1876	void incr_reset (JSON *self)
		1877	CODE:
		1878	{
		1879	SvREFCNT_dec (self->incr_text);
		1880	self->incr_text = 0;
		1881	self->incr_pos = 0;
		1882	self->incr_nest = 0;
		1883	self->incr_mode = 0;
		1884	}
		1885
		1886	void DESTROY (JSON *self)
		1887	CODE:
		1888	SvREFCNT_dec (self->cb_sk_object);
		1889	SvREFCNT_dec (self->cb_object);
		1890	SvREFCNT_dec (self->incr_text);
1042		1891
1043	PROTOTYPES: ENABLE	1892	PROTOTYPES: ENABLE
1044		1893
1045	void to_json (SV *scalar)	1894	void encode_json (SV *scalar)
1046	ALIAS:	1895	ALIAS:
1047	objToJson = 0	1896	to_json_ = 0
		1897	encode_json = F_UTF8
1048	PPCODE:	1898	PPCODE:
		1899	{
		1900	JSON json;
		1901	json_init (&json);
		1902	json.flags |= ix;
1049	XPUSHs (encode_json (scalar, F_UTF8));	1903	XPUSHs (encode_json (scalar, &json));
		1904	}
1050		1905
1051	void from_json (SV *jsonstr)	1906	void decode_json (SV *jsonstr)
1052	ALIAS:	1907	ALIAS:
1053	jsonToObj = 0	1908	from_json_ = 0
		1909	decode_json = F_UTF8
1054	PPCODE:	1910	PPCODE:
		1911	{
		1912	JSON json;
		1913	json_init (&json);
		1914	json.flags |= ix;
1055	XPUSHs (decode_json (jsonstr, F_UTF8));	1915	XPUSHs (decode_json (jsonstr, &json, 0));
		1916	}
1056		1917
		1918

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