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

Comparing JSON-XS/XS.xs (file contents):
Revision 1.25 by root, Fri Apr 6 20:37:22 2007 UTC vs.
Revision 1.53 by root, Tue Jul 10 15:45:34 2007 UTC

…		…
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		9
		10	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)
		11	# define snprintf _snprintf // C compilers have this in stdio.h
		12	#endif
		13
		14	// some old perls do not have this, try to make it work, no
		15	// guarentees, though. if it breaks, you get to keep the pieces.
		16	#ifndef UTF8_MAXBYTES
		17	# define UTF8_MAXBYTES 13
		18	#endif
		19
9	#define F_ASCII 0x00000001UL	20	#define F_ASCII 0x00000001UL
		21	#define F_LATIN1 0x00000002UL
10	#define F_UTF8 0x00000002UL	22	#define F_UTF8 0x00000004UL
11	#define F_INDENT 0x00000004UL	23	#define F_INDENT 0x00000008UL
12	#define F_CANONICAL 0x00000008UL	24	#define F_CANONICAL 0x00000010UL
13	#define F_SPACE_BEFORE 0x00000010UL	25	#define F_SPACE_BEFORE 0x00000020UL
14	#define F_SPACE_AFTER 0x00000020UL	26	#define F_SPACE_AFTER 0x00000040UL
15	#define F_ALLOW_NONREF 0x00000080UL	27	#define F_ALLOW_NONREF 0x00000100UL
16	#define F_SHRINK 0x00000100UL	28	#define F_SHRINK 0x00000200UL
		29	#define F_ALLOW_BLESSED 0x00000400UL
		30	#define F_CONV_BLESSED 0x00000800UL
17	#define F_MAXDEPTH 0xf8000000UL	31	#define F_MAXDEPTH 0xf8000000UL
18	#define S_MAXDEPTH 27	32	#define S_MAXDEPTH 27
		33	#define F_MAXSIZE 0x01f00000UL
		34	#define S_MAXSIZE 20
		35	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
19		36
20	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))	37	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
21		38	#define DEC_SIZE(flags) (1UL << ((flags & F_MAXSIZE ) >> S_MAXSIZE ))
22	// F_SELFCONVERT? <=> to_json/toJson
23	// F_BLESSED? <=> { $__class__$ => }
24		39
25	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER	40	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER
26	#define F_DEFAULT (9UL << S_MAXDEPTH)	41	#define F_DEFAULT (9UL << S_MAXDEPTH)
27		42
28	#define INIT_SIZE 32 // initial scalar size to be allocated	43	#define INIT_SIZE 32 // initial scalar size to be allocated
29	#define INDENT_STEP 3 // spaces per indentation level	44	#define INDENT_STEP 3 // spaces per indentation level
30		45
31	#define UTF8_MAX_LEN 11 // for perls UTF-X: max. number of octets per character
32	#define SHORT_STRING_LEN 512 // special-case strings of up to this size	46	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size
33		47
34	#define SB do {	48	#define SB do {
35	#define SE } while (0)	49	#define SE } while (0)
36		50
		51	#if __GNUC__ >= 3
		52	# define expect(expr,value) __builtin_expect ((expr),(value))
		53	# define inline inline
		54	#else
		55	# define expect(expr,value) (expr)
		56	# define inline static
		57	#endif
		58
		59	#define expect_false(expr) expect ((expr) != 0, 0)
		60	#define expect_true(expr) expect ((expr) != 0, 1)
		61
37	static HV *json_stash; // JSON::XS::	62	static HV json_stash, json_boolean_stash; // JSON::XS::
		63	static SV json_true, json_false;
		64
		65	typedef struct {
		66	U32 flags;
		67	SV *cb_object;
		68	HV *cb_sk_object;
		69	} JSON;
38		70
39	/////////////////////////////////////////////////////////////////////////////	71	/////////////////////////////////////////////////////////////////////////////
40	// utility functions	72	// utility functions
41		73
42	static UV *	74	inline void
43	SvJSON (SV *sv)
44	{
45	if (!(SvROK (sv) && SvOBJECT (SvRV (sv)) && SvSTASH (SvRV (sv)) == json_stash))
46	croak ("object is not of type JSON::XS");
47
48	return &SvUVX (SvRV (sv));
49	}
50
51	static void
52	shrink (SV *sv)	75	shrink (SV *sv)
53	{	76	{
54	sv_utf8_downgrade (sv, 1);	77	sv_utf8_downgrade (sv, 1);
55	if (SvLEN (sv) > SvCUR (sv) + 1)	78	if (SvLEN (sv) > SvCUR (sv) + 1)
56	{	79	{
…		…
65	// decode an utf-8 character and return it, or (UV)-1 in	88	// decode an utf-8 character and return it, or (UV)-1 in
66	// case of an error.	89	// case of an error.
67	// we special-case "safe" characters from U+80 .. U+7FF,	90	// we special-case "safe" characters from U+80 .. U+7FF,
68	// but use the very good perl function to parse anything else.	91	// but use the very good perl function to parse anything else.
69	// note that we never call this function for a ascii codepoints	92	// note that we never call this function for a ascii codepoints
70	static UV	93	inline UV
71	decode_utf8 (unsigned char s, STRLEN len, STRLEN clen)	94	decode_utf8 (unsigned char s, STRLEN len, STRLEN clen)
72	{	95	{
73	if (s[0] > 0xdf \|\| s[0] < 0xc2)	96	if (expect_false (s[0] > 0xdf \|\| s[0] < 0xc2))
74	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);	97	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);
75	else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf)	98	else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf)
76	{	99	{
77	*clen = 2;	100	*clen = 2;
78	return ((s[0] & 0x1f) << 6) \| (s[1] & 0x3f);	101	return ((s[0] & 0x1f) << 6) \| (s[1] & 0x3f);
…		…
91	typedef struct	114	typedef struct
92	{	115	{
93	char *cur; // SvPVX (sv) + current output position	116	char *cur; // SvPVX (sv) + current output position
94	char *end; // SvEND (sv)	117	char *end; // SvEND (sv)
95	SV *sv; // result scalar	118	SV *sv; // result scalar
96	U32 flags; // F_*	119	JSON json;
97	U32 indent; // indentation level	120	U32 indent; // indentation level
98	U32 maxdepth; // max. indentation/recursion level	121	U32 maxdepth; // max. indentation/recursion level
99	} enc_t;	122	} enc_t;
100		123
101	static void	124	inline void
102	need (enc_t *enc, STRLEN len)	125	need (enc_t *enc, STRLEN len)
103	{	126	{
104	if (enc->cur + len >= enc->end)	127	if (expect_false (enc->cur + len >= enc->end))
105	{	128	{
106	STRLEN cur = enc->cur - SvPVX (enc->sv);	129	STRLEN cur = enc->cur - SvPVX (enc->sv);
107	SvGROW (enc->sv, cur + len + 1);	130	SvGROW (enc->sv, cur + len + 1);
108	enc->cur = SvPVX (enc->sv) + cur;	131	enc->cur = SvPVX (enc->sv) + cur;
109	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv);	132	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
110	}	133	}
111	}	134	}
112		135
113	static void	136	inline void
114	encode_ch (enc_t *enc, char ch)	137	encode_ch (enc_t *enc, char ch)
115	{	138	{
116	need (enc, 1);	139	need (enc, 1);
117	*enc->cur++ = ch;	140	*enc->cur++ = ch;
118	}	141	}
…		…
126		149
127	while (str < end)	150	while (str < end)
128	{	151	{
129	unsigned char ch = (unsigned char )str;	152	unsigned char ch = (unsigned char )str;
130		153
131	if (ch >= 0x20 && ch < 0x80) // most common case	154	if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case
132	{	155	{
133	if (ch == '"') // but with slow exceptions	156	if (expect_false (ch == '"')) // but with slow exceptions
134	{	157	{
135	need (enc, len += 1);	158	need (enc, len += 1);
136	*enc->cur++ = '\\';	159	*enc->cur++ = '\\';
137	*enc->cur++ = '"';	160	*enc->cur++ = '"';
138	}	161	}
139	else if (ch == '\\')	162	else if (expect_false (ch == '\\'))
140	{	163	{
141	need (enc, len += 1);	164	need (enc, len += 1);
142	*enc->cur++ = '\\';	165	*enc->cur++ = '\\';
143	*enc->cur++ = '\\';	166	*enc->cur++ = '\\';
144	}	167	}
…		…
162	STRLEN clen;	185	STRLEN clen;
163	UV uch;	186	UV uch;
164		187
165	if (is_utf8)	188	if (is_utf8)
166	{	189	{
167	//uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY);
168	uch = decode_utf8 (str, end - str, &clen);	190	uch = decode_utf8 (str, end - str, &clen);
169	if (clen == (STRLEN)-1)	191	if (clen == (STRLEN)-1)
170	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);	192	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);
171	}	193	}
172	else	194	else
…		…
176	}	198	}
177		199
178	if (uch > 0x10FFFFUL)	200	if (uch > 0x10FFFFUL)
179	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);	201	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
180		202
181	if (uch < 0x80 \|\| enc->flags & F_ASCII)	203	if (uch < 0x80 \|\| enc->json.flags & F_ASCII \|\| (enc->json.flags & F_LATIN1 && uch > 0xFF))
182	{	204	{
183	if (uch > 0xFFFFUL)	205	if (uch > 0xFFFFUL)
184	{	206	{
185	need (enc, len += 11);	207	need (enc, len += 11);
186	sprintf (enc->cur, "\\u%04x\\u%04x",	208	sprintf (enc->cur, "\\u%04x\\u%04x",
…		…
200	*enc->cur++ = hexdigit [(uch >> 0) & 15];	222	*enc->cur++ = hexdigit [(uch >> 0) & 15];
201	}	223	}
202		224
203	str += clen;	225	str += clen;
204	}	226	}
		227	else if (enc->json.flags & F_LATIN1)
		228	{
		229	*enc->cur++ = uch;
		230	str += clen;
		231	}
205	else if (is_utf8)	232	else if (is_utf8)
206	{	233	{
207	need (enc, len += clen);	234	need (enc, len += clen);
208	do	235	do
209	{	236	{
…		…
211	}	238	}
212	while (--clen);	239	while (--clen);
213	}	240	}
214	else	241	else
215	{	242	{
216	need (enc, len += UTF8_MAX_LEN - 1); // never more than 11 bytes needed	243	need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed
217	enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0);	244	enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0);
218	++str;	245	++str;
219	}	246	}
220	}	247	}
221	}	248	}
…		…
223		250
224	--len;	251	--len;
225	}	252	}
226	}	253	}
227		254
228	static void	255	inline void
229	encode_indent (enc_t *enc)	256	encode_indent (enc_t *enc)
230	{	257	{
231	if (enc->flags & F_INDENT)	258	if (enc->json.flags & F_INDENT)
232	{	259	{
233	int spaces = enc->indent * INDENT_STEP;	260	int spaces = enc->indent * INDENT_STEP;
234		261
235	need (enc, spaces);	262	need (enc, spaces);
236	memset (enc->cur, ' ', spaces);	263	memset (enc->cur, ' ', spaces);
237	enc->cur += spaces;	264	enc->cur += spaces;
238	}	265	}
239	}	266	}
240		267
241	static void	268	inline void
242	encode_space (enc_t *enc)	269	encode_space (enc_t *enc)
243	{	270	{
244	need (enc, 1);	271	need (enc, 1);
245	encode_ch (enc, ' ');	272	encode_ch (enc, ' ');
246	}	273	}
247		274
248	static void	275	inline void
249	encode_nl (enc_t *enc)	276	encode_nl (enc_t *enc)
250	{	277	{
251	if (enc->flags & F_INDENT)	278	if (enc->json.flags & F_INDENT)
252	{	279	{
253	need (enc, 1);	280	need (enc, 1);
254	encode_ch (enc, '\n');	281	encode_ch (enc, '\n');
255	}	282	}
256	}	283	}
257		284
258	static void	285	inline void
259	encode_comma (enc_t *enc)	286	encode_comma (enc_t *enc)
260	{	287	{
261	encode_ch (enc, ',');	288	encode_ch (enc, ',');
262		289
263	if (enc->flags & F_INDENT)	290	if (enc->json.flags & F_INDENT)
264	encode_nl (enc);	291	encode_nl (enc);
265	else if (enc->flags & F_SPACE_AFTER)	292	else if (enc->json.flags & F_SPACE_AFTER)
266	encode_space (enc);	293	encode_space (enc);
267	}	294	}
268		295
269	static void encode_sv (enc_t enc, SV sv);	296	static void encode_sv (enc_t enc, SV sv);
270		297
…		…
313	else	340	else
314	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));	341	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));
315		342
316	encode_ch (enc, '"');	343	encode_ch (enc, '"');
317		344
318	if (enc->flags & F_SPACE_BEFORE) encode_space (enc);	345	if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);
319	encode_ch (enc, ':');	346	encode_ch (enc, ':');
320	if (enc->flags & F_SPACE_AFTER ) encode_space (enc);	347	if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);
321	encode_sv (enc, HeVAL (he));	348	encode_sv (enc, HeVAL (he));
322	}	349	}
323		350
324	// compare hash entries, used when all keys are bytestrings	351	// compare hash entries, used when all keys are bytestrings
325	static int	352	static int
…		…
360	{	387	{
361	// for canonical output we have to sort by keys first	388	// for canonical output we have to sort by keys first
362	// actually, this is mostly due to the stupid so-called	389	// actually, this is mostly due to the stupid so-called
363	// security workaround added somewhere in 5.8.x.	390	// security workaround added somewhere in 5.8.x.
364	// that randomises hash orderings	391	// that randomises hash orderings
365	if (enc->flags & F_CANONICAL)	392	if (enc->json.flags & F_CANONICAL)
366	{	393	{
367	HE he, hes [count]; // if your compiler dies here, you need to enable C99 mode
368	int fast = 1;	394	int fast = 1;
		395	HE *he;
		396	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)
		397	HE *hes = _alloca (count sizeof (HE));
		398	#else
		399	HE *hes [count]; // if your compiler dies here, you need to enable C99 mode
		400	#endif
369		401
370	i = 0;	402	i = 0;
371	while ((he = hv_iternext (hv)))	403	while ((he = hv_iternext (hv)))
372	{	404	{
373	hes [i++] = he;	405	hes [i++] = he;
…		…
437	svtype svt;	469	svtype svt;
438		470
439	SvGETMAGIC (sv);	471	SvGETMAGIC (sv);
440	svt = SvTYPE (sv);	472	svt = SvTYPE (sv);
441		473
		474	if (expect_false (SvOBJECT (sv)))
		475	{
		476	if (SvSTASH (sv) == json_boolean_stash)
		477	{
		478	if (SvIV (sv))
		479	encode_str (enc, "true", 4, 0);
		480	else
		481	encode_str (enc, "false", 5, 0);
		482	}
		483	else
		484	{
		485	#if 0
		486	if (0 && sv_derived_from (rv, "JSON::Literal"))
		487	{
		488	// not yet
		489	}
		490	#endif
		491	if (enc->json.flags & F_CONV_BLESSED)
		492	{
		493	// we re-bless the reference to get overload and other niceties right
		494	GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 0);
		495
		496	if (to_json)
		497	{
		498	dSP;
		499
		500	ENTER; SAVETMPS; PUSHMARK (SP);
		501	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
		502
		503	// calling with G_SCALAR ensures that we always get a 1 return value
		504	// check anyways.
		505	PUTBACK;
		506	assert (1 == call_sv ((SV *)GvCV (to_json), G_SCALAR));
		507	SPAGAIN;
		508
		509	// catch this surprisingly common error
		510	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		511	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		512
		513	sv = POPs;
		514	PUTBACK;
		515
		516	encode_sv (enc, sv);
		517
		518	FREETMPS; LEAVE;
		519	}
		520	else if (enc->json.flags & F_ALLOW_BLESSED)
		521	encode_str (enc, "null", 4, 0);
		522	else
		523	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
		524	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		525	}
		526	else if (enc->json.flags & F_ALLOW_BLESSED)
		527	encode_str (enc, "null", 4, 0);
		528	else
		529	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",
		530	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		531	}
		532	}
442	if (svt == SVt_PVHV)	533	else if (svt == SVt_PVHV)
443	encode_hv (enc, (HV *)sv);	534	encode_hv (enc, (HV *)sv);
444	else if (svt == SVt_PVAV)	535	else if (svt == SVt_PVAV)
445	encode_av (enc, (AV *)sv);	536	encode_av (enc, (AV *)sv);
446	else if (svt < SVt_PVAV)	537	else if (svt < SVt_PVAV)
447	{	538	{
448	if (SvNIOK (sv) && SvIV (sv) == 0)	539	STRLEN len = 0;
		540	char *pv = svt ? SvPV (sv, len) : 0;
		541
		542	if (len == 1 && *pv == '1')
		543	encode_str (enc, "true", 4, 0);
		544	else if (len == 1 && *pv == '0')
449	encode_str (enc, "false", 5, 0);	545	encode_str (enc, "false", 5, 0);
450	else if (SvNIOK (sv) && SvIV (sv) == 1)
451	encode_str (enc, "true", 4, 0);
452	else	546	else
453	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",	547	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
454	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	548	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
455	}	549	}
456	else	550	else
…		…
471	encode_str (enc, str, len, SvUTF8 (sv));	565	encode_str (enc, str, len, SvUTF8 (sv));
472	encode_ch (enc, '"');	566	encode_ch (enc, '"');
473	}	567	}
474	else if (SvNOKp (sv))	568	else if (SvNOKp (sv))
475	{	569	{
		570	// trust that perl will do the right thing w.r.t. JSON syntax.
476	need (enc, NV_DIG + 32);	571	need (enc, NV_DIG + 32);
477	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);	572	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
478	enc->cur += strlen (enc->cur);	573	enc->cur += strlen (enc->cur);
479	}	574	}
480	else if (SvIOKp (sv))	575	else if (SvIOKp (sv))
481	{	576	{
482	need (enc, 64);	577	// we assume we can always read an IV as a UV
		578	if (SvUV (sv) & ~(UV)0x7fff)
		579	{
		580	// large integer, use the (rather slow) snprintf way.
		581	need (enc, sizeof (UV) * 3);
483	enc->cur +=	582	enc->cur +=
484	SvIsUV(sv)	583	SvIsUV(sv)
485	? snprintf (enc->cur, 64, "%"UVuf, (UV)SvUVX (sv))	584	? snprintf (enc->cur, sizeof (UV) * 3, "%"UVuf, (UV)SvUVX (sv))
486	: snprintf (enc->cur, 64, "%"IVdf, (IV)SvIVX (sv));	585	: snprintf (enc->cur, sizeof (UV) * 3, "%"IVdf, (IV)SvIVX (sv));
		586	}
		587	else
		588	{
		589	// optimise the "small number case"
		590	// code will likely be branchless and use only a single multiplication
		591	I32 i = SvIV (sv);
		592	U32 u;
		593	char digit, nz = 0;
		594
		595	need (enc, 6);
		596
		597	*enc->cur = '-'; enc->cur += i < 0 ? 1 : 0;
		598	u = i < 0 ? -i : i;
		599
		600	// convert to 4.28 fixed-point representation
		601	u = u * ((0xfffffff + 10000) / 10000); // 10**5, 5 fractional digits
		602
		603	// now output digit by digit, each time masking out the integer part
		604	// and multiplying by 5 while moving the decimal point one to the right,
		605	// resulting in a net multiplication by 10.
		606	// we always write the digit to memory but conditionally increment
		607	// the pointer, to ease the usage of conditional move instructions.
		608	digit = u >> 28; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0xfffffff) 5;
		609	digit = u >> 27; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x7ffffff) 5;
		610	digit = u >> 26; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x3ffffff) 5;
		611	digit = u >> 25; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x1ffffff) 5;
		612	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
		613	}
487	}	614	}
488	else if (SvROK (sv))	615	else if (SvROK (sv))
489	encode_rv (enc, SvRV (sv));	616	encode_rv (enc, SvRV (sv));
490	else if (!SvOK (sv))	617	else if (!SvOK (sv))
491	encode_str (enc, "null", 4, 0);	618	encode_str (enc, "null", 4, 0);
…		…
493	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",	620	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",
494	SvPV_nolen (sv), SvFLAGS (sv));	621	SvPV_nolen (sv), SvFLAGS (sv));
495	}	622	}
496		623
497	static SV *	624	static SV *
498	encode_json (SV *scalar, U32 flags)	625	encode_json (SV scalar, JSON json)
499	{	626	{
500	enc_t enc;	627	enc_t enc;
501		628
502	if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar))	629	if (!(json->flags & F_ALLOW_NONREF) && !SvROK (scalar))
503	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");	630	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
504		631
505	enc.flags = flags;	632	enc.json = *json;
506	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	633	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
507	enc.cur = SvPVX (enc.sv);	634	enc.cur = SvPVX (enc.sv);
508	enc.end = SvEND (enc.sv);	635	enc.end = SvEND (enc.sv);
509	enc.indent = 0;	636	enc.indent = 0;
510	enc.maxdepth = DEC_DEPTH (flags);	637	enc.maxdepth = DEC_DEPTH (enc.json.flags);
511		638
512	SvPOK_only (enc.sv);	639	SvPOK_only (enc.sv);
513	encode_sv (&enc, scalar);	640	encode_sv (&enc, scalar);
514		641
		642	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
		643	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
		644
515	if (!(flags & (F_ASCII \| F_UTF8)))	645	if (!(enc.json.flags & (F_ASCII \| F_LATIN1 \| F_UTF8)))
516	SvUTF8_on (enc.sv);	646	SvUTF8_on (enc.sv);
517		647
518	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
519
520	if (enc.flags & F_SHRINK)	648	if (enc.json.flags & F_SHRINK)
521	shrink (enc.sv);	649	shrink (enc.sv);
522		650
523	return enc.sv;	651	return enc.sv;
524	}	652	}
525		653
…		…
530	typedef struct	658	typedef struct
531	{	659	{
532	char *cur; // current parser pointer	660	char *cur; // current parser pointer
533	char *end; // end of input string	661	char *end; // end of input string
534	const char *err; // parse error, if != 0	662	const char *err; // parse error, if != 0
535	U32 flags; // F_*	663	JSON json;
536	U32 depth; // recursion depth	664	U32 depth; // recursion depth
537	U32 maxdepth; // recursion depth limit	665	U32 maxdepth; // recursion depth limit
538	} dec_t;	666	} dec_t;
539		667
540	static void	668	inline void
541	decode_ws (dec_t *dec)	669	decode_ws (dec_t *dec)
542	{	670	{
543	for (;;)	671	for (;;)
544	{	672	{
545	char ch = *dec->cur;	673	char ch = *dec->cur;
…		…
571	decode_4hex (dec_t *dec)	699	decode_4hex (dec_t *dec)
572	{	700	{
573	signed char d1, d2, d3, d4;	701	signed char d1, d2, d3, d4;
574	unsigned char cur = (unsigned char )dec->cur;	702	unsigned char cur = (unsigned char )dec->cur;
575		703
576	d1 = decode_hexdigit [cur [0]]; if (d1 < 0) ERR ("four hexadecimal digits expected");	704	d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("exactly four hexadecimal digits expected");
577	d2 = decode_hexdigit [cur [1]]; if (d2 < 0) ERR ("four hexadecimal digits expected");	705	d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("exactly four hexadecimal digits expected");
578	d3 = decode_hexdigit [cur [2]]; if (d3 < 0) ERR ("four hexadecimal digits expected");	706	d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("exactly four hexadecimal digits expected");
579	d4 = decode_hexdigit [cur [3]]; if (d4 < 0) ERR ("four hexadecimal digits expected");	707	d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("exactly four hexadecimal digits expected");
580		708
581	dec->cur += 4;	709	dec->cur += 4;
582		710
583	return ((UV)d1) << 12	711	return ((UV)d1) << 12
584	\| ((UV)d2) << 8	712	\| ((UV)d2) << 8
…		…
592	static SV *	720	static SV *
593	decode_str (dec_t *dec)	721	decode_str (dec_t *dec)
594	{	722	{
595	SV *sv = 0;	723	SV *sv = 0;
596	int utf8 = 0;	724	int utf8 = 0;
		725	char *dec_cur = dec->cur;
597		726
598	do	727	do
599	{	728	{
600	char buf [SHORT_STRING_LEN + UTF8_MAX_LEN];	729	char buf [SHORT_STRING_LEN + UTF8_MAXBYTES];
601	char *cur = buf;	730	char *cur = buf;
602		731
603	do	732	do
604	{	733	{
605	unsigned char ch = (unsigned char )dec->cur++;	734	unsigned char ch = (unsigned char )dec_cur++;
606		735
607	if (ch == '"')	736	if (expect_false (ch == '"'))
608	{	737	{
609	--dec->cur;	738	--dec_cur;
610	break;	739	break;
611	}	740	}
612	else if (ch == '\\')	741	else if (expect_false (ch == '\\'))
613	{	742	{
614	switch (*dec->cur)	743	switch (*dec_cur)
615	{	744	{
616	case '\\':	745	case '\\':
617	case '/':	746	case '/':
618	case '"': cur++ = dec->cur++; break;	747	case '"': cur++ = dec_cur++; break;
619		748
620	case 'b': ++dec->cur; *cur++ = '\010'; break;	749	case 'b': ++dec_cur; *cur++ = '\010'; break;
621	case 't': ++dec->cur; *cur++ = '\011'; break;	750	case 't': ++dec_cur; *cur++ = '\011'; break;
622	case 'n': ++dec->cur; *cur++ = '\012'; break;	751	case 'n': ++dec_cur; *cur++ = '\012'; break;
623	case 'f': ++dec->cur; *cur++ = '\014'; break;	752	case 'f': ++dec_cur; *cur++ = '\014'; break;
624	case 'r': ++dec->cur; *cur++ = '\015'; break;	753	case 'r': ++dec_cur; *cur++ = '\015'; break;
625		754
626	case 'u':	755	case 'u':
627	{	756	{
628	UV lo, hi;	757	UV lo, hi;
629	++dec->cur;	758	++dec_cur;
630		759
		760	dec->cur = dec_cur;
631	hi = decode_4hex (dec);	761	hi = decode_4hex (dec);
		762	dec_cur = dec->cur;
632	if (hi == (UV)-1)	763	if (hi == (UV)-1)
633	goto fail;	764	goto fail;
634		765
635	// possibly a surrogate pair	766	// possibly a surrogate pair
636	if (hi >= 0xd800)	767	if (hi >= 0xd800)
637	if (hi < 0xdc00)	768	if (hi < 0xdc00)
638	{	769	{
639	if (dec->cur [0] != '\\' \|\| dec->cur [1] != 'u')	770	if (dec_cur [0] != '\\' \|\| dec_cur [1] != 'u')
640	ERR ("missing low surrogate character in surrogate pair");	771	ERR ("missing low surrogate character in surrogate pair");
641		772
642	dec->cur += 2;	773	dec_cur += 2;
643		774
		775	dec->cur = dec_cur;
644	lo = decode_4hex (dec);	776	lo = decode_4hex (dec);
		777	dec_cur = dec->cur;
645	if (lo == (UV)-1)	778	if (lo == (UV)-1)
646	goto fail;	779	goto fail;
647		780
648	if (lo < 0xdc00 \|\| lo >= 0xe000)	781	if (lo < 0xdc00 \|\| lo >= 0xe000)
649	ERR ("surrogate pair expected");	782	ERR ("surrogate pair expected");
…		…
663	*cur++ = hi;	796	*cur++ = hi;
664	}	797	}
665	break;	798	break;
666		799
667	default:	800	default:
668	--dec->cur;	801	--dec_cur;
669	ERR ("illegal backslash escape sequence in string");	802	ERR ("illegal backslash escape sequence in string");
670	}	803	}
671	}	804	}
672	else if (ch >= 0x20 && ch <= 0x7f)	805	else if (expect_true (ch >= 0x20 && ch <= 0x7f))
673	*cur++ = ch;	806	*cur++ = ch;
674	else if (ch >= 0x80)	807	else if (ch >= 0x80)
675	{	808	{
676	STRLEN clen;	809	STRLEN clen;
677	UV uch;	810	UV uch;
678		811
679	--dec->cur;	812	--dec_cur;
680		813
681	uch = decode_utf8 (dec->cur, dec->end - dec->cur, &clen);	814	uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
682	if (clen == (STRLEN)-1)	815	if (clen == (STRLEN)-1)
683	ERR ("malformed UTF-8 character in JSON string");	816	ERR ("malformed UTF-8 character in JSON string");
684		817
685	do	818	do
686	cur++ = dec->cur++;	819	cur++ = dec_cur++;
687	while (--clen);	820	while (--clen);
688		821
689	utf8 = 1;	822	utf8 = 1;
690	}	823	}
691	else	824	else
692	{	825	{
693	--dec->cur;	826	--dec_cur;
694		827
695	if (!ch)	828	if (!ch)
696	ERR ("unexpected end of string while parsing JSON string");	829	ERR ("unexpected end of string while parsing JSON string");
697	else	830	else
698	ERR ("invalid character encountered while parsing JSON string");	831	ERR ("invalid character encountered while parsing JSON string");
…		…
711	}	844	}
712	else	845	else
713	sv = newSVpvn (buf, len);	846	sv = newSVpvn (buf, len);
714	}	847	}
715	}	848	}
716	while (*dec->cur != '"');	849	while (*dec_cur != '"');
717		850
718	++dec->cur;	851	++dec_cur;
719		852
720	if (sv)	853	if (sv)
721	{	854	{
722	SvPOK_only (sv);	855	SvPOK_only (sv);
723	*SvEND (sv) = 0;	856	*SvEND (sv) = 0;
…		…
726	SvUTF8_on (sv);	859	SvUTF8_on (sv);
727	}	860	}
728	else	861	else
729	sv = newSVpvn ("", 0);	862	sv = newSVpvn ("", 0);
730		863
		864	dec->cur = dec_cur;
731	return sv;	865	return sv;
732		866
733	fail:	867	fail:
		868	dec->cur = dec_cur;
734	return 0;	869	return 0;
735	}	870	}
736		871
737	static SV *	872	static SV *
738	decode_num (dec_t *dec)	873	decode_num (dec_t *dec)
…		…
796	is_nv = 1;	931	is_nv = 1;
797	}	932	}
798		933
799	if (!is_nv)	934	if (!is_nv)
800	{	935	{
801	UV uv;	936	// special case the rather common 1..4-digit-int case, assumes 32 bit ints or so
802	int numtype = grok_number (start, dec->cur - start, &uv);	937	if (*start == '-')
803	if (numtype & IS_NUMBER_IN_UV)	938	switch (dec->cur - start)
804	if (numtype & IS_NUMBER_NEG)
805	{	939	{
806	if (uv < (UV)IV_MIN)	940	case 2: return newSViv (-( start [1] - '0' * 1));
807	return newSViv (-(IV)uv);	941	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));
		942	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
		943	case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
808	}	944	}
		945	else
		946	switch (dec->cur - start)
		947	{
		948	case 1: return newSViv ( start [0] - '0' * 1);
		949	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
		950	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
		951	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
		952	}
		953
		954	{
		955	UV uv;
		956	int numtype = grok_number (start, dec->cur - start, &uv);
		957	if (numtype & IS_NUMBER_IN_UV)
		958	if (numtype & IS_NUMBER_NEG)
		959	{
		960	if (uv < (UV)IV_MIN)
		961	return newSViv (-(IV)uv);
		962	}
809	else	963	else
810	return newSVuv (uv);	964	return newSVuv (uv);
		965
		966	// here would likely be the place for bigint support
811	}	967	}
		968	}
812		969
		970	// if we ever support bigint or bigfloat, this is the place for bigfloat
813	return newSVnv (Atof (start));	971	return newSVnv (Atof (start));
814		972
815	fail:	973	fail:
816	return 0;	974	return 0;
817	}	975	}
…		…
861	}	1019	}
862		1020
863	static SV *	1021	static SV *
864	decode_hv (dec_t *dec)	1022	decode_hv (dec_t *dec)
865	{	1023	{
		1024	SV *sv;
866	HV *hv = newHV ();	1025	HV *hv = newHV ();
867		1026
868	DEC_INC_DEPTH;	1027	DEC_INC_DEPTH;
869	decode_ws (dec);	1028	decode_ws (dec);
870		1029
871	if (*dec->cur == '}')	1030	if (*dec->cur == '}')
872	++dec->cur;	1031	++dec->cur;
873	else	1032	else
874	for (;;)	1033	for (;;)
875	{	1034	{
876	SV key, value;
877
878	decode_ws (dec); EXPECT_CH ('"');	1035	decode_ws (dec); EXPECT_CH ('"');
879		1036
880	key = decode_str (dec);	1037	// heuristic: assume that
881	if (!key)	1038	// a) decode_str + hv_store_ent are abysmally slow.
882	goto fail;	1039	// b) most hash keys are short, simple ascii text.
		1040	// => try to "fast-match" such strings to avoid
		1041	// the overhead of decode_str + hv_store_ent.
		1042	{
		1043	SV *value;
		1044	char *p = dec->cur;
		1045	char *e = p + 24; // only try up to 24 bytes
883		1046
884	decode_ws (dec); EXPECT_CH (':');	1047	for (;;)
885
886	value = decode_sv (dec);
887	if (!value)
888	{	1048	{
		1049	// the >= 0x80 is true on most architectures
		1050	if (p == e \|\| p < 0x20 \|\| p >= 0x80 \|\| *p == '\\')
		1051	{
		1052	// slow path, back up and use decode_str
		1053	SV *key = decode_str (dec);
		1054	if (!key)
		1055	goto fail;
		1056
		1057	decode_ws (dec); EXPECT_CH (':');
		1058
		1059	value = decode_sv (dec);
		1060	if (!value)
		1061	{
		1062	SvREFCNT_dec (key);
		1063	goto fail;
		1064	}
		1065
		1066	hv_store_ent (hv, key, value, 0);
889	SvREFCNT_dec (key);	1067	SvREFCNT_dec (key);
		1068
		1069	break;
		1070	}
		1071	else if (*p == '"')
		1072	{
		1073	// fast path, got a simple key
		1074	char *key = dec->cur;
		1075	int len = p - key;
		1076	dec->cur = p + 1;
		1077
		1078	decode_ws (dec); EXPECT_CH (':');
		1079
		1080	value = decode_sv (dec);
		1081	if (!value)
890	goto fail;	1082	goto fail;
		1083
		1084	hv_store (hv, key, len, value, 0);
		1085
		1086	break;
		1087	}
		1088
		1089	++p;
891	}	1090	}
892		1091	}
893	hv_store_ent (hv, key, value, 0);
894	SvREFCNT_dec (key);
895		1092
896	decode_ws (dec);	1093	decode_ws (dec);
897		1094
898	if (*dec->cur == '}')	1095	if (*dec->cur == '}')
899	{	1096	{
…		…
906		1103
907	++dec->cur;	1104	++dec->cur;
908	}	1105	}
909		1106
910	DEC_DEC_DEPTH;	1107	DEC_DEC_DEPTH;
911	return newRV_noinc ((SV *)hv);	1108	sv = newRV_noinc ((SV *)hv);
		1109
		1110	// check filter callbacks
		1111	if (dec->json.flags & F_HOOK)
		1112	{
		1113	if (dec->json.cb_sk_object && HvKEYS (hv) == 1)
		1114	{
		1115	HE cb, he;
		1116
		1117	hv_iterinit (hv);
		1118	he = hv_iternext (hv);
		1119	hv_iterinit (hv);
		1120
		1121	// the next line creates a mortal sv each time its called.
		1122	// might want to optimise this for common cases.
		1123	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);
		1124
		1125	if (cb)
		1126	{
		1127	dSP;
		1128	int count;
		1129
		1130	ENTER; SAVETMPS; PUSHMARK (SP);
		1131	XPUSHs (HeVAL (he));
		1132
		1133	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
		1134
		1135	if (count == 1)
		1136	{
		1137	sv = newSVsv (POPs);
		1138	FREETMPS; LEAVE;
		1139	return sv;
		1140	}
		1141
		1142	FREETMPS; LEAVE;
		1143	}
		1144	}
		1145
		1146	if (dec->json.cb_object)
		1147	{
		1148	dSP;
		1149	int count;
		1150
		1151	ENTER; SAVETMPS; PUSHMARK (SP);
		1152	XPUSHs (sv_2mortal (sv));
		1153
		1154	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;
		1155
		1156	if (count == 1)
		1157	{
		1158	sv = newSVsv (POPs);
		1159	FREETMPS; LEAVE;
		1160	return sv;
		1161	}
		1162
		1163	SvREFCNT_inc (sv);
		1164	FREETMPS; LEAVE;
		1165	}
		1166	}
		1167
		1168	return sv;
912		1169
913	fail:	1170	fail:
914	SvREFCNT_dec (hv);	1171	SvREFCNT_dec (hv);
915	DEC_DEC_DEPTH;	1172	DEC_DEC_DEPTH;
916	return 0;	1173	return 0;
…		…
918		1175
919	static SV *	1176	static SV *
920	decode_sv (dec_t *dec)	1177	decode_sv (dec_t *dec)
921	{	1178	{
922	decode_ws (dec);	1179	decode_ws (dec);
		1180
		1181	// the beauty of JSON: you need exactly one character lookahead
		1182	// to parse anything.
923	switch (*dec->cur)	1183	switch (*dec->cur)
924	{	1184	{
925	case '"': ++dec->cur; return decode_str (dec);	1185	case '"': ++dec->cur; return decode_str (dec);
926	case '[': ++dec->cur; return decode_av (dec);	1186	case '[': ++dec->cur; return decode_av (dec);
927	case '{': ++dec->cur; return decode_hv (dec);	1187	case '{': ++dec->cur; return decode_hv (dec);
…		…
933		1193
934	case 't':	1194	case 't':
935	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1195	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
936	{	1196	{
937	dec->cur += 4;	1197	dec->cur += 4;
938	return newSViv (1);	1198	return SvREFCNT_inc (json_true);
939	}	1199	}
940	else	1200	else
941	ERR ("'true' expected");	1201	ERR ("'true' expected");
942		1202
943	break;	1203	break;
944		1204
945	case 'f':	1205	case 'f':
946	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))	1206	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
947	{	1207	{
948	dec->cur += 5;	1208	dec->cur += 5;
949	return newSViv (0);	1209	return SvREFCNT_inc (json_false);
950	}	1210	}
951	else	1211	else
952	ERR ("'false' expected");	1212	ERR ("'false' expected");
953		1213
954	break;	1214	break;
…		…
972	fail:	1232	fail:
973	return 0;	1233	return 0;
974	}	1234	}
975		1235
976	static SV *	1236	static SV *
977	decode_json (SV *string, U32 flags)	1237	decode_json (SV string, JSON json, UV *offset_return)
978	{	1238	{
979	dec_t dec;	1239	dec_t dec;
		1240	UV offset;
980	SV *sv;	1241	SV *sv;
981		1242
		1243	SvGETMAGIC (string);
982	SvUPGRADE (string, SVt_PV);	1244	SvUPGRADE (string, SVt_PV);
983		1245
		1246	if (json->flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (json->flags))
		1247	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		1248	(unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (json->flags));
		1249
984	if (flags & F_UTF8)	1250	if (json->flags & F_UTF8)
985	sv_utf8_downgrade (string, 0);	1251	sv_utf8_downgrade (string, 0);
986	else	1252	else
987	sv_utf8_upgrade (string);	1253	sv_utf8_upgrade (string);
988		1254
989	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1255	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
990		1256
991	dec.flags = flags;	1257	dec.json = *json;
992	dec.cur = SvPVX (string);	1258	dec.cur = SvPVX (string);
993	dec.end = SvEND (string);	1259	dec.end = SvEND (string);
994	dec.err = 0;	1260	dec.err = 0;
995	dec.depth = 0;	1261	dec.depth = 0;
996	dec.maxdepth = DEC_DEPTH (dec.flags);	1262	dec.maxdepth = DEC_DEPTH (dec.json.flags);
997		1263
		1264	if (dec.json.cb_object \|\| dec.json.cb_sk_object)
		1265	dec.json.flags \|= F_HOOK;
		1266
998	*dec.end = 0; // this should basically be a nop, too, but make sure its there	1267	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
999	sv = decode_sv (&dec);	1268	sv = decode_sv (&dec);
1000		1269
		1270	if (!(offset_return \|\| !sv))
		1271	{
		1272	// check for trailing garbage
		1273	decode_ws (&dec);
		1274
		1275	if (*dec.cur)
		1276	{
		1277	dec.err = "garbage after JSON object";
		1278	SvREFCNT_dec (sv);
		1279	sv = 0;
		1280	}
		1281	}
		1282
		1283	if (offset_return \|\| !sv)
		1284	{
		1285	offset = dec.json.flags & F_UTF8
		1286	? dec.cur - SvPVX (string)
		1287	: utf8_distance (dec.cur, SvPVX (string));
		1288
		1289	if (offset_return)
		1290	*offset_return = offset;
		1291	}
		1292
1001	if (!sv)	1293	if (!sv)
1002	{	1294	{
1003	IV offset = dec.flags & F_UTF8
1004	? dec.cur - SvPVX (string)
1005	: utf8_distance (dec.cur, SvPVX (string));
1006	SV *uni = sv_newmortal ();	1295	SV *uni = sv_newmortal ();
1007		1296
1008	// horrible hack to silence warning inside pv_uni_display	1297	// horrible hack to silence warning inside pv_uni_display
1009	COP cop = *PL_curcop;	1298	COP cop = *PL_curcop;
1010	cop.cop_warnings = pWARN_NONE;	1299	cop.cop_warnings = pWARN_NONE;
…		…
1020	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1309	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
1021	}	1310	}
1022		1311
1023	sv = sv_2mortal (sv);	1312	sv = sv_2mortal (sv);
1024		1313
1025	if (!(dec.flags & F_ALLOW_NONREF) && !SvROK (sv))	1314	if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))
1026	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");	1315	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
1027		1316
1028	return sv;	1317	return sv;
1029	}	1318	}
1030		1319
…		…
1034	MODULE = JSON::XS PACKAGE = JSON::XS	1323	MODULE = JSON::XS PACKAGE = JSON::XS
1035		1324
1036	BOOT:	1325	BOOT:
1037	{	1326	{
1038	int i;	1327	int i;
1039
1040	memset (decode_hexdigit, 0xff, 256);
1041		1328
1042	for (i = 0; i < 256; ++i)	1329	for (i = 0; i < 256; ++i)
1043	decode_hexdigit [i] =	1330	decode_hexdigit [i] =
1044	i >= '0' && i <= '9' ? i - '0'	1331	i >= '0' && i <= '9' ? i - '0'
1045	: i >= 'a' && i <= 'f' ? i - 'a' + 10	1332	: i >= 'a' && i <= 'f' ? i - 'a' + 10
1046	: i >= 'A' && i <= 'F' ? i - 'A' + 10	1333	: i >= 'A' && i <= 'F' ? i - 'A' + 10
1047	: -1;	1334	: -1;
1048		1335
1049	json_stash = gv_stashpv ("JSON::XS", 1);	1336	json_stash = gv_stashpv ("JSON::XS" , 1);
		1337	json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);
		1338
		1339	json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true );
		1340	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);
1050	}	1341	}
1051		1342
1052	PROTOTYPES: DISABLE	1343	PROTOTYPES: DISABLE
1053		1344
1054	SV new (char dummy)	1345	void new (char *klass)
1055	CODE:	1346	PPCODE:
1056	RETVAL = sv_bless (newRV_noinc (newSVuv (F_DEFAULT)), json_stash);	1347	{
1057	OUTPUT:	1348	SV *pv = NEWSV (0, sizeof (JSON));
1058	RETVAL	1349	SvPOK_only (pv);
		1350	Zero (SvPVX (pv), 1, JSON);
		1351	((JSON *)SvPVX (pv))->flags = F_DEFAULT;
		1352	XPUSHs (sv_2mortal (sv_bless (newRV_noinc (pv), json_stash)));
		1353	}
1059		1354
1060	SV ascii (SV self, int enable = 1)	1355	void ascii (JSON *self, int enable = 1)
1061	ALIAS:	1356	ALIAS:
1062	ascii = F_ASCII	1357	ascii = F_ASCII
		1358	latin1 = F_LATIN1
1063	utf8 = F_UTF8	1359	utf8 = F_UTF8
1064	indent = F_INDENT	1360	indent = F_INDENT
1065	canonical = F_CANONICAL	1361	canonical = F_CANONICAL
1066	space_before = F_SPACE_BEFORE	1362	space_before = F_SPACE_BEFORE
1067	space_after = F_SPACE_AFTER	1363	space_after = F_SPACE_AFTER
1068	pretty = F_PRETTY	1364	pretty = F_PRETTY
1069	allow_nonref = F_ALLOW_NONREF	1365	allow_nonref = F_ALLOW_NONREF
1070	shrink = F_SHRINK	1366	shrink = F_SHRINK
		1367	allow_blessed = F_ALLOW_BLESSED
		1368	convert_blessed = F_CONV_BLESSED
1071	CODE:	1369	PPCODE:
1072	{	1370	{
1073	UV *uv = SvJSON (self);
1074	if (enable)	1371	if (enable)
1075	*uv \|= ix;	1372	self->flags \|= ix;
1076	else	1373	else
1077	*uv &= ~ix;	1374	self->flags &= ~ix;
1078		1375
1079	RETVAL = newSVsv (self);	1376	XPUSHs (ST (0));
1080	}	1377	}
1081	OUTPUT:
1082	RETVAL
1083		1378
1084	SV max_depth (SV self, UV max_depth = 0x80000000UL)	1379	void max_depth (JSON *self, UV max_depth = 0x80000000UL)
1085	CODE:	1380	PPCODE:
1086	{	1381	{
1087	UV *uv = SvJSON (self);
1088	UV log2 = 0;	1382	UV log2 = 0;
1089		1383
1090	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;	1384	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;
1091		1385
1092	while ((1UL << log2) < max_depth)	1386	while ((1UL << log2) < max_depth)
1093	++log2;	1387	++log2;
1094		1388
1095	uv = uv & ~F_MAXDEPTH \| (log2 << S_MAXDEPTH);	1389	self->flags = self->flags & ~F_MAXDEPTH \| (log2 << S_MAXDEPTH);
1096		1390
1097	RETVAL = newSVsv (self);	1391	XPUSHs (ST (0));
1098	}	1392	}
1099	OUTPUT:
1100	RETVAL
1101		1393
1102	void encode (SV self, SV scalar)	1394	void max_size (JSON *self, UV max_size = 0)
1103	PPCODE:	1395	PPCODE:
1104	XPUSHs (encode_json (scalar, *SvJSON (self)));	1396	{
		1397	UV log2 = 0;
1105		1398
1106	void decode (SV self, SV jsonstr)	1399	if (max_size > 0x80000000UL) max_size = 0x80000000UL;
		1400	if (max_size == 1) max_size = 2;
		1401
		1402	while ((1UL << log2) < max_size)
		1403	++log2;
		1404
		1405	self->flags = self->flags & ~F_MAXSIZE \| (log2 << S_MAXSIZE);
		1406
		1407	XPUSHs (ST (0));
		1408	}
		1409
		1410	void filter_json_object (JSON self, SV cb = &PL_sv_undef)
1107	PPCODE:	1411	PPCODE:
		1412	{
		1413	SvREFCNT_dec (self->cb_object);
		1414	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;
		1415
		1416	XPUSHs (ST (0));
		1417	}
		1418
		1419	void filter_json_single_key_object (JSON self, SV key, SV *cb = &PL_sv_undef)
		1420	PPCODE:
		1421	{
		1422	if (!self->cb_sk_object)
		1423	self->cb_sk_object = newHV ();
		1424
		1425	if (SvOK (cb))
		1426	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
		1427	else
		1428	{
		1429	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
		1430
		1431	if (!HvKEYS (self->cb_sk_object))
		1432	{
		1433	SvREFCNT_dec (self->cb_sk_object);
		1434	self->cb_sk_object = 0;
		1435	}
		1436	}
		1437
		1438	XPUSHs (ST (0));
		1439	}
		1440
		1441	void encode (JSON self, SV scalar)
		1442	PPCODE:
		1443	XPUSHs (encode_json (scalar, self));
		1444
		1445	void decode (JSON self, SV jsonstr)
		1446	PPCODE:
1108	XPUSHs (decode_json (jsonstr, *SvJSON (self)));	1447	XPUSHs (decode_json (jsonstr, self, 0));
		1448
		1449	void decode_prefix (JSON self, SV jsonstr)
		1450	PPCODE:
		1451	{
		1452	UV offset;
		1453	EXTEND (SP, 2);
		1454	PUSHs (decode_json (jsonstr, self, &offset));
		1455	PUSHs (sv_2mortal (newSVuv (offset)));
		1456	}
		1457
		1458	void DESTROY (JSON *self)
		1459	CODE:
		1460	SvREFCNT_dec (self->cb_sk_object);
		1461	SvREFCNT_dec (self->cb_object);
1109		1462
1110	PROTOTYPES: ENABLE	1463	PROTOTYPES: ENABLE
1111		1464
1112	void to_json (SV *scalar)	1465	void to_json (SV *scalar)
1113	ALIAS:
1114	objToJson = 0
1115	PPCODE:	1466	PPCODE:
		1467	{
		1468	JSON json = { F_DEFAULT \| F_UTF8 };
1116	XPUSHs (encode_json (scalar, F_DEFAULT \| F_UTF8));	1469	XPUSHs (encode_json (scalar, &json));
		1470	}
1117		1471
1118	void from_json (SV *jsonstr)	1472	void from_json (SV *jsonstr)
1119	ALIAS:
1120	jsonToObj = 0
1121	PPCODE:	1473	PPCODE:
		1474	{
		1475	JSON json = { F_DEFAULT \| F_UTF8 };
1122	XPUSHs (decode_json (jsonstr, F_DEFAULT \| F_UTF8));	1476	XPUSHs (decode_json (jsonstr, &json, 0));
		1477	}
1123		1478

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Comparing JSON-XS/XS.xs (file contents): Revision 1.25 by root, Fri Apr 6 20:37:22 2007 UTC vs. Revision 1.53 by root, Tue Jul 10 15:45:34 2007 UTC

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Comparing JSON-XS/XS.xs (file contents):
Revision 1.25 by root, Fri Apr 6 20:37:22 2007 UTC vs.
Revision 1.53 by root, Tue Jul 10 15:45:34 2007 UTC