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

Comparing JSON-XS/XS.xs (file contents):
Revision 1.27 by root, Mon Apr 9 05:09:57 2007 UTC vs.
Revision 1.57 by root, Mon Aug 13 16:05:42 2007 UTC

…		…
1	#include "EXTERN.h"	1	#include "EXTERN.h"
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
4		4
5	#include "assert.h"	5	#include <assert.h>
6	#include "string.h"	6	#include <string.h>
7	#include "stdlib.h"	7	#include <stdlib.h>
8	#include "stdio.h"	8	#include <stdio.h>
		9	#include <float.h>
9		10
10	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)	11	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)
11	# define snprintf _snprintf // C compilers have this in stdio.h	12	# define snprintf _snprintf // C compilers have this in stdio.h
12	#endif	13	#endif
13		14
		15	// some old perls do not have this, try to make it work, no
		16	// guarentees, though. if it breaks, you get to keep the pieces.
		17	#ifndef UTF8_MAXBYTES
		18	# define UTF8_MAXBYTES 13
		19	#endif
		20
14	#define F_ASCII 0x00000001UL	21	#define F_ASCII 0x00000001UL
		22	#define F_LATIN1 0x00000002UL
15	#define F_UTF8 0x00000002UL	23	#define F_UTF8 0x00000004UL
16	#define F_INDENT 0x00000004UL	24	#define F_INDENT 0x00000008UL
17	#define F_CANONICAL 0x00000008UL	25	#define F_CANONICAL 0x00000010UL
18	#define F_SPACE_BEFORE 0x00000010UL	26	#define F_SPACE_BEFORE 0x00000020UL
19	#define F_SPACE_AFTER 0x00000020UL	27	#define F_SPACE_AFTER 0x00000040UL
20	#define F_ALLOW_NONREF 0x00000080UL	28	#define F_ALLOW_NONREF 0x00000100UL
21	#define F_SHRINK 0x00000100UL	29	#define F_SHRINK 0x00000200UL
		30	#define F_ALLOW_BLESSED 0x00000400UL
		31	#define F_CONV_BLESSED 0x00000800UL
22	#define F_MAXDEPTH 0xf8000000UL	32	#define F_MAXDEPTH 0xf8000000UL
23	#define S_MAXDEPTH 27	33	#define S_MAXDEPTH 27
		34	#define F_MAXSIZE 0x01f00000UL
		35	#define S_MAXSIZE 20
		36	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
24		37
25	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))	38	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
26		39	#define DEC_SIZE(flags) (1UL << ((flags & F_MAXSIZE ) >> S_MAXSIZE ))
27	// F_SELFCONVERT? <=> to_json/toJson
28	// F_BLESSED? <=> { $__class__$ => }
29		40
30	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER	41	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER
31	#define F_DEFAULT (9UL << S_MAXDEPTH)	42	#define F_DEFAULT (9UL << S_MAXDEPTH)
32		43
33	#define INIT_SIZE 32 // initial scalar size to be allocated	44	#define INIT_SIZE 32 // initial scalar size to be allocated
34	#define INDENT_STEP 3 // spaces per indentation level	45	#define INDENT_STEP 3 // spaces per indentation level
35		46
36	#define UTF8_MAX_LEN 11 // for perls UTF-X: max. number of octets per character
37	#define SHORT_STRING_LEN 512 // special-case strings of up to this size	47	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size
38		48
39	#define SB do {	49	#define SB do {
40	#define SE } while (0)	50	#define SE } while (0)
41		51
		52	#if __GNUC__ >= 3
		53	# define expect(expr,value) __builtin_expect ((expr),(value))
		54	# define inline inline
		55	#else
		56	# define expect(expr,value) (expr)
		57	# define inline static
		58	#endif
		59
		60	#define expect_false(expr) expect ((expr) != 0, 0)
		61	#define expect_true(expr) expect ((expr) != 0, 1)
		62
		63	#ifdef USE_ITHREADS
		64	# define JSON_SLOW 1
		65	#else
		66	# define JSON_SLOW 1
		67	#endif
		68
42	static HV *json_stash; // JSON::XS::	69	static HV json_stash, json_boolean_stash; // JSON::XS::
		70	static SV json_true, json_false;
		71
		72	typedef struct {
		73	U32 flags;
		74	SV *cb_object;
		75	HV *cb_sk_object;
		76	} JSON;
43		77
44	/////////////////////////////////////////////////////////////////////////////	78	/////////////////////////////////////////////////////////////////////////////
45	// utility functions	79	// utility functions
46		80
47	static UV *	81	inline void
48	SvJSON (SV *sv)
49	{
50	if (!(SvROK (sv) && SvOBJECT (SvRV (sv)) && SvSTASH (SvRV (sv)) == json_stash))
51	croak ("object is not of type JSON::XS");
52
53	return &SvUVX (SvRV (sv));
54	}
55
56	static void
57	shrink (SV *sv)	82	shrink (SV *sv)
58	{	83	{
59	sv_utf8_downgrade (sv, 1);	84	sv_utf8_downgrade (sv, 1);
60	if (SvLEN (sv) > SvCUR (sv) + 1)	85	if (SvLEN (sv) > SvCUR (sv) + 1)
61	{	86	{
70	// decode an utf-8 character and return it, or (UV)-1 in	95	// decode an utf-8 character and return it, or (UV)-1 in
71	// case of an error.	96	// case of an error.
72	// we special-case "safe" characters from U+80 .. U+7FF,	97	// we special-case "safe" characters from U+80 .. U+7FF,
73	// but use the very good perl function to parse anything else.	98	// but use the very good perl function to parse anything else.
74	// note that we never call this function for a ascii codepoints	99	// note that we never call this function for a ascii codepoints
75	static UV	100	inline UV
76	decode_utf8 (unsigned char s, STRLEN len, STRLEN clen)	101	decode_utf8 (unsigned char s, STRLEN len, STRLEN clen)
77	{	102	{
78	if (s[0] > 0xdf \|\| s[0] < 0xc2)	103	if (expect_false (s[0] > 0xdf \|\| s[0] < 0xc2))
79	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);	104	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);
80	else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf)	105	else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf)
81	{	106	{
82	*clen = 2;	107	*clen = 2;
83	return ((s[0] & 0x1f) << 6) \| (s[1] & 0x3f);	108	return ((s[0] & 0x1f) << 6) \| (s[1] & 0x3f);
…		…
96	typedef struct	121	typedef struct
97	{	122	{
98	char *cur; // SvPVX (sv) + current output position	123	char *cur; // SvPVX (sv) + current output position
99	char *end; // SvEND (sv)	124	char *end; // SvEND (sv)
100	SV *sv; // result scalar	125	SV *sv; // result scalar
101	U32 flags; // F_*	126	JSON json;
102	U32 indent; // indentation level	127	U32 indent; // indentation level
103	U32 maxdepth; // max. indentation/recursion level	128	U32 maxdepth; // max. indentation/recursion level
104	} enc_t;	129	} enc_t;
105		130
106	static void	131	inline void
107	need (enc_t *enc, STRLEN len)	132	need (enc_t *enc, STRLEN len)
108	{	133	{
109	if (enc->cur + len >= enc->end)	134	if (expect_false (enc->cur + len >= enc->end))
110	{	135	{
111	STRLEN cur = enc->cur - SvPVX (enc->sv);	136	STRLEN cur = enc->cur - SvPVX (enc->sv);
112	SvGROW (enc->sv, cur + len + 1);	137	SvGROW (enc->sv, cur + len + 1);
113	enc->cur = SvPVX (enc->sv) + cur;	138	enc->cur = SvPVX (enc->sv) + cur;
114	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	139	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
115	}	140	}
116	}	141	}
117		142
118	static void	143	inline void
119	encode_ch (enc_t *enc, char ch)	144	encode_ch (enc_t *enc, char ch)
120	{	145	{
121	need (enc, 1);	146	need (enc, 1);
122	*enc->cur++ = ch;	147	*enc->cur++ = ch;
123	}	148	}
…		…
131		156
132	while (str < end)	157	while (str < end)
133	{	158	{
134	unsigned char ch = (unsigned char )str;	159	unsigned char ch = (unsigned char )str;
135		160
136	if (ch >= 0x20 && ch < 0x80) // most common case	161	if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case
137	{	162	{
138	if (ch == '"') // but with slow exceptions	163	if (expect_false (ch == '"')) // but with slow exceptions
139	{	164	{
140	need (enc, len += 1);	165	need (enc, len += 1);
141	*enc->cur++ = '\\';	166	*enc->cur++ = '\\';
142	*enc->cur++ = '"';	167	*enc->cur++ = '"';
143	}	168	}
144	else if (ch == '\\')	169	else if (expect_false (ch == '\\'))
145	{	170	{
146	need (enc, len += 1);	171	need (enc, len += 1);
147	*enc->cur++ = '\\';	172	*enc->cur++ = '\\';
148	*enc->cur++ = '\\';	173	*enc->cur++ = '\\';
149	}	174	}
…		…
167	STRLEN clen;	192	STRLEN clen;
168	UV uch;	193	UV uch;
169		194
170	if (is_utf8)	195	if (is_utf8)
171	{	196	{
172	//uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY);
173	uch = decode_utf8 (str, end - str, &clen);	197	uch = decode_utf8 (str, end - str, &clen);
174	if (clen == (STRLEN)-1)	198	if (clen == (STRLEN)-1)
175	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);	199	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);
176	}	200	}
177	else	201	else
…		…
181	}	205	}
182		206
183	if (uch > 0x10FFFFUL)	207	if (uch > 0x10FFFFUL)
184	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);	208	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
185		209
186	if (uch < 0x80 \|\| enc->flags & F_ASCII)	210	if (uch < 0x80 \|\| enc->json.flags & F_ASCII \|\| (enc->json.flags & F_LATIN1 && uch > 0xFF))
187	{	211	{
188	if (uch > 0xFFFFUL)	212	if (uch > 0xFFFFUL)
189	{	213	{
190	need (enc, len += 11);	214	need (enc, len += 11);
191	sprintf (enc->cur, "\\u%04x\\u%04x",	215	sprintf (enc->cur, "\\u%04x\\u%04x",
…		…
205	*enc->cur++ = hexdigit [(uch >> 0) & 15];	229	*enc->cur++ = hexdigit [(uch >> 0) & 15];
206	}	230	}
207		231
208	str += clen;	232	str += clen;
209	}	233	}
		234	else if (enc->json.flags & F_LATIN1)
		235	{
		236	*enc->cur++ = uch;
		237	str += clen;
		238	}
210	else if (is_utf8)	239	else if (is_utf8)
211	{	240	{
212	need (enc, len += clen);	241	need (enc, len += clen);
213	do	242	do
214	{	243	{
…		…
216	}	245	}
217	while (--clen);	246	while (--clen);
218	}	247	}
219	else	248	else
220	{	249	{
221	need (enc, len += UTF8_MAX_LEN - 1); // never more than 11 bytes needed	250	need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed
222	enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0);	251	enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0);
223	++str;	252	++str;
224	}	253	}
225	}	254	}
226	}	255	}
…		…
228		257
229	--len;	258	--len;
230	}	259	}
231	}	260	}
232		261
233	static void	262	inline void
234	encode_indent (enc_t *enc)	263	encode_indent (enc_t *enc)
235	{	264	{
236	if (enc->flags & F_INDENT)	265	if (enc->json.flags & F_INDENT)
237	{	266	{
238	int spaces = enc->indent * INDENT_STEP;	267	int spaces = enc->indent * INDENT_STEP;
239		268
240	need (enc, spaces);	269	need (enc, spaces);
241	memset (enc->cur, ' ', spaces);	270	memset (enc->cur, ' ', spaces);
242	enc->cur += spaces;	271	enc->cur += spaces;
243	}	272	}
244	}	273	}
245		274
246	static void	275	inline void
247	encode_space (enc_t *enc)	276	encode_space (enc_t *enc)
248	{	277	{
249	need (enc, 1);	278	need (enc, 1);
250	encode_ch (enc, ' ');	279	encode_ch (enc, ' ');
251	}	280	}
252		281
253	static void	282	inline void
254	encode_nl (enc_t *enc)	283	encode_nl (enc_t *enc)
255	{	284	{
256	if (enc->flags & F_INDENT)	285	if (enc->json.flags & F_INDENT)
257	{	286	{
258	need (enc, 1);	287	need (enc, 1);
259	encode_ch (enc, '\n');	288	encode_ch (enc, '\n');
260	}	289	}
261	}	290	}
262		291
263	static void	292	inline void
264	encode_comma (enc_t *enc)	293	encode_comma (enc_t *enc)
265	{	294	{
266	encode_ch (enc, ',');	295	encode_ch (enc, ',');
267		296
268	if (enc->flags & F_INDENT)	297	if (enc->json.flags & F_INDENT)
269	encode_nl (enc);	298	encode_nl (enc);
270	else if (enc->flags & F_SPACE_AFTER)	299	else if (enc->json.flags & F_SPACE_AFTER)
271	encode_space (enc);	300	encode_space (enc);
272	}	301	}
273		302
274	static void encode_sv (enc_t enc, SV sv);	303	static void encode_sv (enc_t enc, SV sv);
275		304
…		…
284	encode_ch (enc, '['); encode_nl (enc);	313	encode_ch (enc, '['); encode_nl (enc);
285	++enc->indent;	314	++enc->indent;
286		315
287	for (i = 0; i <= len; ++i)	316	for (i = 0; i <= len; ++i)
288	{	317	{
		318	SV **svp = av_fetch (av, i, 0);
		319
289	encode_indent (enc);	320	encode_indent (enc);
290	encode_sv (enc, *av_fetch (av, i, 0));	321
		322	if (svp)
		323	encode_sv (enc, *svp);
		324	else
		325	encode_str (enc, "null", 4, 0);
291		326
292	if (i < len)	327	if (i < len)
293	encode_comma (enc);	328	encode_comma (enc);
294	}	329	}
295		330
…		…
318	else	353	else
319	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));	354	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));
320		355
321	encode_ch (enc, '"');	356	encode_ch (enc, '"');
322		357
323	if (enc->flags & F_SPACE_BEFORE) encode_space (enc);	358	if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);
324	encode_ch (enc, ':');	359	encode_ch (enc, ':');
325	if (enc->flags & F_SPACE_AFTER ) encode_space (enc);	360	if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);
326	encode_sv (enc, HeVAL (he));	361	encode_sv (enc, HeVAL (he));
327	}	362	}
328		363
329	// compare hash entries, used when all keys are bytestrings	364	// compare hash entries, used when all keys are bytestrings
330	static int	365	static int
…		…
365	{	400	{
366	// for canonical output we have to sort by keys first	401	// for canonical output we have to sort by keys first
367	// actually, this is mostly due to the stupid so-called	402	// actually, this is mostly due to the stupid so-called
368	// security workaround added somewhere in 5.8.x.	403	// security workaround added somewhere in 5.8.x.
369	// that randomises hash orderings	404	// that randomises hash orderings
370	if (enc->flags & F_CANONICAL)	405	if (enc->json.flags & F_CANONICAL)
371	{	406	{
372	HE he, hes [count]; // if your compiler dies here, you need to enable C99 mode
373	int fast = 1;	407	int fast = 1;
		408	HE *he;
		409	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)
		410	HE *hes = _alloca (count sizeof (HE));
		411	#else
		412	HE *hes [count]; // if your compiler dies here, you need to enable C99 mode
		413	#endif
374		414
375	i = 0;	415	i = 0;
376	while ((he = hv_iternext (hv)))	416	while ((he = hv_iternext (hv)))
377	{	417	{
378	hes [i++] = he;	418	hes [i++] = he;
…		…
442	svtype svt;	482	svtype svt;
443		483
444	SvGETMAGIC (sv);	484	SvGETMAGIC (sv);
445	svt = SvTYPE (sv);	485	svt = SvTYPE (sv);
446		486
		487	if (expect_false (SvOBJECT (sv)))
		488	{
		489	HV *stash = !JSON_SLOW \|\| json_boolean_stash
		490	? json_boolean_stash
		491	: gv_stashpv ("JSON::XS::Boolean", 1);
		492
		493	if (SvSTASH (sv) == stash)
		494	{
		495	if (SvIV (sv))
		496	encode_str (enc, "true", 4, 0);
		497	else
		498	encode_str (enc, "false", 5, 0);
		499	}
		500	else
		501	{
		502	#if 0
		503	if (0 && sv_derived_from (rv, "JSON::Literal"))
		504	{
		505	// not yet
		506	}
		507	#endif
		508	if (enc->json.flags & F_CONV_BLESSED)
		509	{
		510	// we re-bless the reference to get overload and other niceties right
		511	GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 0);
		512
		513	if (to_json)
		514	{
		515	int count;
		516	dSP;
		517
		518	ENTER; SAVETMPS; PUSHMARK (SP);
		519	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
		520
		521	// calling with G_SCALAR ensures that we always get a 1 return value
		522	PUTBACK;
		523	call_sv ((SV *)GvCV (to_json), G_SCALAR);
		524	SPAGAIN;
		525
		526	// catch this surprisingly common error
		527	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		528	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		529
		530	sv = POPs;
		531	PUTBACK;
		532
		533	encode_sv (enc, sv);
		534
		535	FREETMPS; LEAVE;
		536	}
		537	else if (enc->json.flags & F_ALLOW_BLESSED)
		538	encode_str (enc, "null", 4, 0);
		539	else
		540	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
		541	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		542	}
		543	else if (enc->json.flags & F_ALLOW_BLESSED)
		544	encode_str (enc, "null", 4, 0);
		545	else
		546	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",
		547	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		548	}
		549	}
447	if (svt == SVt_PVHV)	550	else if (svt == SVt_PVHV)
448	encode_hv (enc, (HV *)sv);	551	encode_hv (enc, (HV *)sv);
449	else if (svt == SVt_PVAV)	552	else if (svt == SVt_PVAV)
450	encode_av (enc, (AV *)sv);	553	encode_av (enc, (AV *)sv);
451	else if (svt < SVt_PVAV)	554	else if (svt < SVt_PVAV)
452	{	555	{
453	if (SvNIOK (sv) && SvIV (sv) == 0)	556	STRLEN len = 0;
		557	char *pv = svt ? SvPV (sv, len) : 0;
		558
		559	if (len == 1 && *pv == '1')
		560	encode_str (enc, "true", 4, 0);
		561	else if (len == 1 && *pv == '0')
454	encode_str (enc, "false", 5, 0);	562	encode_str (enc, "false", 5, 0);
455	else if (SvNIOK (sv) && SvIV (sv) == 1)
456	encode_str (enc, "true", 4, 0);
457	else	563	else
458	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",	564	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
459	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	565	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
460	}	566	}
461	else	567	else
…		…
476	encode_str (enc, str, len, SvUTF8 (sv));	582	encode_str (enc, str, len, SvUTF8 (sv));
477	encode_ch (enc, '"');	583	encode_ch (enc, '"');
478	}	584	}
479	else if (SvNOKp (sv))	585	else if (SvNOKp (sv))
480	{	586	{
		587	// trust that perl will do the right thing w.r.t. JSON syntax.
481	need (enc, NV_DIG + 32);	588	need (enc, NV_DIG + 32);
482	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);	589	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
483	enc->cur += strlen (enc->cur);	590	enc->cur += strlen (enc->cur);
484	}	591	}
485	else if (SvIOKp (sv))	592	else if (SvIOKp (sv))
486	{	593	{
487	need (enc, 64);	594	// we assume we can always read an IV as a UV
		595	if (SvUV (sv) & ~(UV)0x7fff)
		596	{
		597	// large integer, use the (rather slow) snprintf way.
		598	need (enc, sizeof (UV) * 3);
488	enc->cur +=	599	enc->cur +=
489	SvIsUV(sv)	600	SvIsUV(sv)
490	? snprintf (enc->cur, 64, "%"UVuf, (UV)SvUVX (sv))	601	? snprintf (enc->cur, sizeof (UV) * 3, "%"UVuf, (UV)SvUVX (sv))
491	: snprintf (enc->cur, 64, "%"IVdf, (IV)SvIVX (sv));	602	: snprintf (enc->cur, sizeof (UV) * 3, "%"IVdf, (IV)SvIVX (sv));
		603	}
		604	else
		605	{
		606	// optimise the "small number case"
		607	// code will likely be branchless and use only a single multiplication
		608	I32 i = SvIV (sv);
		609	U32 u;
		610	char digit, nz = 0;
		611
		612	need (enc, 6);
		613
		614	*enc->cur = '-'; enc->cur += i < 0 ? 1 : 0;
		615	u = i < 0 ? -i : i;
		616
		617	// convert to 4.28 fixed-point representation
		618	u = u * ((0xfffffff + 10000) / 10000); // 10**5, 5 fractional digits
		619
		620	// now output digit by digit, each time masking out the integer part
		621	// and multiplying by 5 while moving the decimal point one to the right,
		622	// resulting in a net multiplication by 10.
		623	// we always write the digit to memory but conditionally increment
		624	// the pointer, to ease the usage of conditional move instructions.
		625	digit = u >> 28; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0xfffffff) 5;
		626	digit = u >> 27; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x7ffffff) 5;
		627	digit = u >> 26; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x3ffffff) 5;
		628	digit = u >> 25; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x1ffffff) 5;
		629	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
		630	}
492	}	631	}
493	else if (SvROK (sv))	632	else if (SvROK (sv))
494	encode_rv (enc, SvRV (sv));	633	encode_rv (enc, SvRV (sv));
495	else if (!SvOK (sv))	634	else if (!SvOK (sv))
496	encode_str (enc, "null", 4, 0);	635	encode_str (enc, "null", 4, 0);
…		…
498	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",	637	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",
499	SvPV_nolen (sv), SvFLAGS (sv));	638	SvPV_nolen (sv), SvFLAGS (sv));
500	}	639	}
501		640
502	static SV *	641	static SV *
503	encode_json (SV *scalar, U32 flags)	642	encode_json (SV scalar, JSON json)
504	{	643	{
505	enc_t enc;	644	enc_t enc;
506		645
507	if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar))	646	if (!(json->flags & F_ALLOW_NONREF) && !SvROK (scalar))
508	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");	647	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
509		648
510	enc.flags = flags;	649	enc.json = *json;
511	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	650	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
512	enc.cur = SvPVX (enc.sv);	651	enc.cur = SvPVX (enc.sv);
513	enc.end = SvEND (enc.sv);	652	enc.end = SvEND (enc.sv);
514	enc.indent = 0;	653	enc.indent = 0;
515	enc.maxdepth = DEC_DEPTH (flags);	654	enc.maxdepth = DEC_DEPTH (enc.json.flags);
516		655
517	SvPOK_only (enc.sv);	656	SvPOK_only (enc.sv);
518	encode_sv (&enc, scalar);	657	encode_sv (&enc, scalar);
519		658
520	if (!(flags & (F_ASCII \| F_UTF8)))
521	SvUTF8_on (enc.sv);
522
523	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	659	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
524	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	660	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
525		661
		662	if (!(enc.json.flags & (F_ASCII \| F_LATIN1 \| F_UTF8)))
		663	SvUTF8_on (enc.sv);
		664
526	if (enc.flags & F_SHRINK)	665	if (enc.json.flags & F_SHRINK)
527	shrink (enc.sv);	666	shrink (enc.sv);
528		667
529	return enc.sv;	668	return enc.sv;
530	}	669	}
531		670
…		…
536	typedef struct	675	typedef struct
537	{	676	{
538	char *cur; // current parser pointer	677	char *cur; // current parser pointer
539	char *end; // end of input string	678	char *end; // end of input string
540	const char *err; // parse error, if != 0	679	const char *err; // parse error, if != 0
541	U32 flags; // F_*	680	JSON json;
542	U32 depth; // recursion depth	681	U32 depth; // recursion depth
543	U32 maxdepth; // recursion depth limit	682	U32 maxdepth; // recursion depth limit
544	} dec_t;	683	} dec_t;
545		684
546	static void	685	inline void
547	decode_ws (dec_t *dec)	686	decode_ws (dec_t *dec)
548	{	687	{
549	for (;;)	688	for (;;)
550	{	689	{
551	char ch = *dec->cur;	690	char ch = *dec->cur;
…		…
577	decode_4hex (dec_t *dec)	716	decode_4hex (dec_t *dec)
578	{	717	{
579	signed char d1, d2, d3, d4;	718	signed char d1, d2, d3, d4;
580	unsigned char cur = (unsigned char )dec->cur;	719	unsigned char cur = (unsigned char )dec->cur;
581		720
582	d1 = decode_hexdigit [cur [0]]; if (d1 < 0) ERR ("four hexadecimal digits expected");	721	d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("exactly four hexadecimal digits expected");
583	d2 = decode_hexdigit [cur [1]]; if (d2 < 0) ERR ("four hexadecimal digits expected");	722	d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("exactly four hexadecimal digits expected");
584	d3 = decode_hexdigit [cur [2]]; if (d3 < 0) ERR ("four hexadecimal digits expected");	723	d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("exactly four hexadecimal digits expected");
585	d4 = decode_hexdigit [cur [3]]; if (d4 < 0) ERR ("four hexadecimal digits expected");	724	d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("exactly four hexadecimal digits expected");
586		725
587	dec->cur += 4;	726	dec->cur += 4;
588		727
589	return ((UV)d1) << 12	728	return ((UV)d1) << 12
590	\| ((UV)d2) << 8	729	\| ((UV)d2) << 8
…		…
598	static SV *	737	static SV *
599	decode_str (dec_t *dec)	738	decode_str (dec_t *dec)
600	{	739	{
601	SV *sv = 0;	740	SV *sv = 0;
602	int utf8 = 0;	741	int utf8 = 0;
		742	char *dec_cur = dec->cur;
603		743
604	do	744	do
605	{	745	{
606	char buf [SHORT_STRING_LEN + UTF8_MAX_LEN];	746	char buf [SHORT_STRING_LEN + UTF8_MAXBYTES];
607	char *cur = buf;	747	char *cur = buf;
608		748
609	do	749	do
610	{	750	{
611	unsigned char ch = (unsigned char )dec->cur++;	751	unsigned char ch = (unsigned char )dec_cur++;
612		752
613	if (ch == '"')	753	if (expect_false (ch == '"'))
614	{	754	{
615	--dec->cur;	755	--dec_cur;
616	break;	756	break;
617	}	757	}
618	else if (ch == '\\')	758	else if (expect_false (ch == '\\'))
619	{	759	{
620	switch (*dec->cur)	760	switch (*dec_cur)
621	{	761	{
622	case '\\':	762	case '\\':
623	case '/':	763	case '/':
624	case '"': cur++ = dec->cur++; break;	764	case '"': cur++ = dec_cur++; break;
625		765
626	case 'b': ++dec->cur; *cur++ = '\010'; break;	766	case 'b': ++dec_cur; *cur++ = '\010'; break;
627	case 't': ++dec->cur; *cur++ = '\011'; break;	767	case 't': ++dec_cur; *cur++ = '\011'; break;
628	case 'n': ++dec->cur; *cur++ = '\012'; break;	768	case 'n': ++dec_cur; *cur++ = '\012'; break;
629	case 'f': ++dec->cur; *cur++ = '\014'; break;	769	case 'f': ++dec_cur; *cur++ = '\014'; break;
630	case 'r': ++dec->cur; *cur++ = '\015'; break;	770	case 'r': ++dec_cur; *cur++ = '\015'; break;
631		771
632	case 'u':	772	case 'u':
633	{	773	{
634	UV lo, hi;	774	UV lo, hi;
635	++dec->cur;	775	++dec_cur;
636		776
		777	dec->cur = dec_cur;
637	hi = decode_4hex (dec);	778	hi = decode_4hex (dec);
		779	dec_cur = dec->cur;
638	if (hi == (UV)-1)	780	if (hi == (UV)-1)
639	goto fail;	781	goto fail;
640		782
641	// possibly a surrogate pair	783	// possibly a surrogate pair
642	if (hi >= 0xd800)	784	if (hi >= 0xd800)
643	if (hi < 0xdc00)	785	if (hi < 0xdc00)
644	{	786	{
645	if (dec->cur [0] != '\\' \|\| dec->cur [1] != 'u')	787	if (dec_cur [0] != '\\' \|\| dec_cur [1] != 'u')
646	ERR ("missing low surrogate character in surrogate pair");	788	ERR ("missing low surrogate character in surrogate pair");
647		789
648	dec->cur += 2;	790	dec_cur += 2;
649		791
		792	dec->cur = dec_cur;
650	lo = decode_4hex (dec);	793	lo = decode_4hex (dec);
		794	dec_cur = dec->cur;
651	if (lo == (UV)-1)	795	if (lo == (UV)-1)
652	goto fail;	796	goto fail;
653		797
654	if (lo < 0xdc00 \|\| lo >= 0xe000)	798	if (lo < 0xdc00 \|\| lo >= 0xe000)
655	ERR ("surrogate pair expected");	799	ERR ("surrogate pair expected");
…		…
669	*cur++ = hi;	813	*cur++ = hi;
670	}	814	}
671	break;	815	break;
672		816
673	default:	817	default:
674	--dec->cur;	818	--dec_cur;
675	ERR ("illegal backslash escape sequence in string");	819	ERR ("illegal backslash escape sequence in string");
676	}	820	}
677	}	821	}
678	else if (ch >= 0x20 && ch <= 0x7f)	822	else if (expect_true (ch >= 0x20 && ch <= 0x7f))
679	*cur++ = ch;	823	*cur++ = ch;
680	else if (ch >= 0x80)	824	else if (ch >= 0x80)
681	{	825	{
682	STRLEN clen;	826	STRLEN clen;
683	UV uch;	827	UV uch;
684		828
685	--dec->cur;	829	--dec_cur;
686		830
687	uch = decode_utf8 (dec->cur, dec->end - dec->cur, &clen);	831	uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
688	if (clen == (STRLEN)-1)	832	if (clen == (STRLEN)-1)
689	ERR ("malformed UTF-8 character in JSON string");	833	ERR ("malformed UTF-8 character in JSON string");
690		834
691	do	835	do
692	cur++ = dec->cur++;	836	cur++ = dec_cur++;
693	while (--clen);	837	while (--clen);
694		838
695	utf8 = 1;	839	utf8 = 1;
696	}	840	}
697	else	841	else
698	{	842	{
699	--dec->cur;	843	--dec_cur;
700		844
701	if (!ch)	845	if (!ch)
702	ERR ("unexpected end of string while parsing JSON string");	846	ERR ("unexpected end of string while parsing JSON string");
703	else	847	else
704	ERR ("invalid character encountered while parsing JSON string");	848	ERR ("invalid character encountered while parsing JSON string");
…		…
717	}	861	}
718	else	862	else
719	sv = newSVpvn (buf, len);	863	sv = newSVpvn (buf, len);
720	}	864	}
721	}	865	}
722	while (*dec->cur != '"');	866	while (*dec_cur != '"');
723		867
724	++dec->cur;	868	++dec_cur;
725		869
726	if (sv)	870	if (sv)
727	{	871	{
728	SvPOK_only (sv);	872	SvPOK_only (sv);
729	*SvEND (sv) = 0;	873	*SvEND (sv) = 0;
…		…
732	SvUTF8_on (sv);	876	SvUTF8_on (sv);
733	}	877	}
734	else	878	else
735	sv = newSVpvn ("", 0);	879	sv = newSVpvn ("", 0);
736		880
		881	dec->cur = dec_cur;
737	return sv;	882	return sv;
738		883
739	fail:	884	fail:
		885	dec->cur = dec_cur;
740	return 0;	886	return 0;
741	}	887	}
742		888
743	static SV *	889	static SV *
744	decode_num (dec_t *dec)	890	decode_num (dec_t *dec)
…		…
802	is_nv = 1;	948	is_nv = 1;
803	}	949	}
804		950
805	if (!is_nv)	951	if (!is_nv)
806	{	952	{
807	UV uv;	953	int len = dec->cur - start;
808	int numtype = grok_number (start, dec->cur - start, &uv);	954
809	if (numtype & IS_NUMBER_IN_UV)	955	// special case the rather common 1..4-digit-int case, assumes 32 bit ints or so
810	if (numtype & IS_NUMBER_NEG)	956	if (*start == '-')
		957	switch (len)
811	{	958	{
812	if (uv < (UV)IV_MIN)	959	case 2: return newSViv (-( start [1] - '0' * 1));
813	return newSViv (-(IV)uv);	960	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));
		961	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
		962	case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
814	}	963	}
		964	else
		965	switch (len)
		966	{
		967	case 1: return newSViv ( start [0] - '0' * 1);
		968	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
		969	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
		970	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
		971	}
		972
		973	{
		974	UV uv;
		975	int numtype = grok_number (start, len, &uv);
		976	if (numtype & IS_NUMBER_IN_UV)
		977	if (numtype & IS_NUMBER_NEG)
		978	{
		979	if (uv < (UV)IV_MIN)
		980	return newSViv (-(IV)uv);
		981	}
815	else	982	else
816	return newSVuv (uv);	983	return newSVuv (uv);
817	}	984	}
818		985
		986	len -= *start == '-' ? 1 : 0;
		987
		988	// does not fit into IV or UV, try NV
		989	if ((sizeof (NV) == sizeof (double) && DBL_DIG >= len)
		990	#if defined (LDBL_DIG)
		991	\|\| (sizeof (NV) == sizeof (long double) && LDBL_DIG >= len)
		992	#endif
		993	)
		994	// fits into NV without loss of precision
		995	return newSVnv (Atof (start));
		996
		997	// everything else fails, convert it to a string
		998	return newSVpvn (start, dec->cur - start);
		999	}
		1000
		1001	// loss of precision here
819	return newSVnv (Atof (start));	1002	return newSVnv (Atof (start));
820		1003
821	fail:	1004	fail:
822	return 0;	1005	return 0;
823	}	1006	}
…		…
867	}	1050	}
868		1051
869	static SV *	1052	static SV *
870	decode_hv (dec_t *dec)	1053	decode_hv (dec_t *dec)
871	{	1054	{
		1055	SV *sv;
872	HV *hv = newHV ();	1056	HV *hv = newHV ();
873		1057
874	DEC_INC_DEPTH;	1058	DEC_INC_DEPTH;
875	decode_ws (dec);	1059	decode_ws (dec);
876		1060
877	if (*dec->cur == '}')	1061	if (*dec->cur == '}')
878	++dec->cur;	1062	++dec->cur;
879	else	1063	else
880	for (;;)	1064	for (;;)
881	{	1065	{
882	SV key, value;
883
884	decode_ws (dec); EXPECT_CH ('"');	1066	decode_ws (dec); EXPECT_CH ('"');
885		1067
886	key = decode_str (dec);	1068	// heuristic: assume that
887	if (!key)	1069	// a) decode_str + hv_store_ent are abysmally slow.
888	goto fail;	1070	// b) most hash keys are short, simple ascii text.
		1071	// => try to "fast-match" such strings to avoid
		1072	// the overhead of decode_str + hv_store_ent.
		1073	{
		1074	SV *value;
		1075	char *p = dec->cur;
		1076	char *e = p + 24; // only try up to 24 bytes
889		1077
890	decode_ws (dec); EXPECT_CH (':');	1078	for (;;)
891
892	value = decode_sv (dec);
893	if (!value)
894	{	1079	{
		1080	// the >= 0x80 is true on most architectures
		1081	if (p == e \|\| p < 0x20 \|\| p >= 0x80 \|\| *p == '\\')
		1082	{
		1083	// slow path, back up and use decode_str
		1084	SV *key = decode_str (dec);
		1085	if (!key)
		1086	goto fail;
		1087
		1088	decode_ws (dec); EXPECT_CH (':');
		1089
		1090	value = decode_sv (dec);
		1091	if (!value)
		1092	{
		1093	SvREFCNT_dec (key);
		1094	goto fail;
		1095	}
		1096
		1097	hv_store_ent (hv, key, value, 0);
895	SvREFCNT_dec (key);	1098	SvREFCNT_dec (key);
		1099
		1100	break;
		1101	}
		1102	else if (*p == '"')
		1103	{
		1104	// fast path, got a simple key
		1105	char *key = dec->cur;
		1106	int len = p - key;
		1107	dec->cur = p + 1;
		1108
		1109	decode_ws (dec); EXPECT_CH (':');
		1110
		1111	value = decode_sv (dec);
		1112	if (!value)
896	goto fail;	1113	goto fail;
		1114
		1115	hv_store (hv, key, len, value, 0);
		1116
		1117	break;
		1118	}
		1119
		1120	++p;
897	}	1121	}
898		1122	}
899	hv_store_ent (hv, key, value, 0);
900	SvREFCNT_dec (key);
901		1123
902	decode_ws (dec);	1124	decode_ws (dec);
903		1125
904	if (*dec->cur == '}')	1126	if (*dec->cur == '}')
905	{	1127	{
…		…
912		1134
913	++dec->cur;	1135	++dec->cur;
914	}	1136	}
915		1137
916	DEC_DEC_DEPTH;	1138	DEC_DEC_DEPTH;
917	return newRV_noinc ((SV *)hv);	1139	sv = newRV_noinc ((SV *)hv);
		1140
		1141	// check filter callbacks
		1142	if (dec->json.flags & F_HOOK)
		1143	{
		1144	if (dec->json.cb_sk_object && HvKEYS (hv) == 1)
		1145	{
		1146	HE cb, he;
		1147
		1148	hv_iterinit (hv);
		1149	he = hv_iternext (hv);
		1150	hv_iterinit (hv);
		1151
		1152	// the next line creates a mortal sv each time its called.
		1153	// might want to optimise this for common cases.
		1154	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);
		1155
		1156	if (cb)
		1157	{
		1158	dSP;
		1159	int count;
		1160
		1161	ENTER; SAVETMPS; PUSHMARK (SP);
		1162	XPUSHs (HeVAL (he));
		1163
		1164	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
		1165
		1166	if (count == 1)
		1167	{
		1168	sv = newSVsv (POPs);
		1169	FREETMPS; LEAVE;
		1170	return sv;
		1171	}
		1172
		1173	FREETMPS; LEAVE;
		1174	}
		1175	}
		1176
		1177	if (dec->json.cb_object)
		1178	{
		1179	dSP;
		1180	int count;
		1181
		1182	ENTER; SAVETMPS; PUSHMARK (SP);
		1183	XPUSHs (sv_2mortal (sv));
		1184
		1185	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;
		1186
		1187	if (count == 1)
		1188	{
		1189	sv = newSVsv (POPs);
		1190	FREETMPS; LEAVE;
		1191	return sv;
		1192	}
		1193
		1194	SvREFCNT_inc (sv);
		1195	FREETMPS; LEAVE;
		1196	}
		1197	}
		1198
		1199	return sv;
918		1200
919	fail:	1201	fail:
920	SvREFCNT_dec (hv);	1202	SvREFCNT_dec (hv);
921	DEC_DEC_DEPTH;	1203	DEC_DEC_DEPTH;
922	return 0;	1204	return 0;
…		…
924		1206
925	static SV *	1207	static SV *
926	decode_sv (dec_t *dec)	1208	decode_sv (dec_t *dec)
927	{	1209	{
928	decode_ws (dec);	1210	decode_ws (dec);
		1211
		1212	// the beauty of JSON: you need exactly one character lookahead
		1213	// to parse anything.
929	switch (*dec->cur)	1214	switch (*dec->cur)
930	{	1215	{
931	case '"': ++dec->cur; return decode_str (dec);	1216	case '"': ++dec->cur; return decode_str (dec);
932	case '[': ++dec->cur; return decode_av (dec);	1217	case '[': ++dec->cur; return decode_av (dec);
933	case '{': ++dec->cur; return decode_hv (dec);	1218	case '{': ++dec->cur; return decode_hv (dec);
…		…
939		1224
940	case 't':	1225	case 't':
941	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1226	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
942	{	1227	{
943	dec->cur += 4;	1228	dec->cur += 4;
944	return newSViv (1);	1229	return SvREFCNT_inc (json_true);
945	}	1230	}
946	else	1231	else
947	ERR ("'true' expected");	1232	ERR ("'true' expected");
948		1233
949	break;	1234	break;
950		1235
951	case 'f':	1236	case 'f':
952	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))	1237	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
953	{	1238	{
954	dec->cur += 5;	1239	dec->cur += 5;
955	return newSViv (0);	1240	return SvREFCNT_inc (json_false);
956	}	1241	}
957	else	1242	else
958	ERR ("'false' expected");	1243	ERR ("'false' expected");
959		1244
960	break;	1245	break;
…		…
978	fail:	1263	fail:
979	return 0;	1264	return 0;
980	}	1265	}
981		1266
982	static SV *	1267	static SV *
983	decode_json (SV *string, U32 flags)	1268	decode_json (SV string, JSON json, UV *offset_return)
984	{	1269	{
985	dec_t dec;	1270	dec_t dec;
		1271	UV offset;
986	SV *sv;	1272	SV *sv;
987		1273
		1274	SvGETMAGIC (string);
988	SvUPGRADE (string, SVt_PV);	1275	SvUPGRADE (string, SVt_PV);
989		1276
		1277	if (json->flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (json->flags))
		1278	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		1279	(unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (json->flags));
		1280
990	if (flags & F_UTF8)	1281	if (json->flags & F_UTF8)
991	sv_utf8_downgrade (string, 0);	1282	sv_utf8_downgrade (string, 0);
992	else	1283	else
993	sv_utf8_upgrade (string);	1284	sv_utf8_upgrade (string);
994		1285
995	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1286	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
996		1287
997	dec.flags = flags;	1288	dec.json = *json;
998	dec.cur = SvPVX (string);	1289	dec.cur = SvPVX (string);
999	dec.end = SvEND (string);	1290	dec.end = SvEND (string);
1000	dec.err = 0;	1291	dec.err = 0;
1001	dec.depth = 0;	1292	dec.depth = 0;
1002	dec.maxdepth = DEC_DEPTH (dec.flags);	1293	dec.maxdepth = DEC_DEPTH (dec.json.flags);
1003		1294
		1295	if (dec.json.cb_object \|\| dec.json.cb_sk_object)
		1296	dec.json.flags \|= F_HOOK;
		1297
1004	*dec.end = 0; // this should basically be a nop, too, but make sure its there	1298	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
1005	sv = decode_sv (&dec);	1299	sv = decode_sv (&dec);
1006		1300
		1301	if (!(offset_return \|\| !sv))
		1302	{
		1303	// check for trailing garbage
		1304	decode_ws (&dec);
		1305
		1306	if (*dec.cur)
		1307	{
		1308	dec.err = "garbage after JSON object";
		1309	SvREFCNT_dec (sv);
		1310	sv = 0;
		1311	}
		1312	}
		1313
		1314	if (offset_return \|\| !sv)
		1315	{
		1316	offset = dec.json.flags & F_UTF8
		1317	? dec.cur - SvPVX (string)
		1318	: utf8_distance (dec.cur, SvPVX (string));
		1319
		1320	if (offset_return)
		1321	*offset_return = offset;
		1322	}
		1323
1007	if (!sv)	1324	if (!sv)
1008	{	1325	{
1009	IV offset = dec.flags & F_UTF8
1010	? dec.cur - SvPVX (string)
1011	: utf8_distance (dec.cur, SvPVX (string));
1012	SV *uni = sv_newmortal ();	1326	SV *uni = sv_newmortal ();
1013		1327
1014	// horrible hack to silence warning inside pv_uni_display	1328	// horrible hack to silence warning inside pv_uni_display
1015	COP cop = *PL_curcop;	1329	COP cop = *PL_curcop;
1016	cop.cop_warnings = pWARN_NONE;	1330	cop.cop_warnings = pWARN_NONE;
…		…
1026	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1340	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
1027	}	1341	}
1028		1342
1029	sv = sv_2mortal (sv);	1343	sv = sv_2mortal (sv);
1030		1344
1031	if (!(dec.flags & F_ALLOW_NONREF) && !SvROK (sv))	1345	if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))
1032	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");	1346	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
1033		1347
1034	return sv;	1348	return sv;
1035	}	1349	}
1036		1350
…		…
1040	MODULE = JSON::XS PACKAGE = JSON::XS	1354	MODULE = JSON::XS PACKAGE = JSON::XS
1041		1355
1042	BOOT:	1356	BOOT:
1043	{	1357	{
1044	int i;	1358	int i;
1045
1046	memset (decode_hexdigit, 0xff, 256);
1047		1359
1048	for (i = 0; i < 256; ++i)	1360	for (i = 0; i < 256; ++i)
1049	decode_hexdigit [i] =	1361	decode_hexdigit [i] =
1050	i >= '0' && i <= '9' ? i - '0'	1362	i >= '0' && i <= '9' ? i - '0'
1051	: i >= 'a' && i <= 'f' ? i - 'a' + 10	1363	: i >= 'a' && i <= 'f' ? i - 'a' + 10
1052	: i >= 'A' && i <= 'F' ? i - 'A' + 10	1364	: i >= 'A' && i <= 'F' ? i - 'A' + 10
1053	: -1;	1365	: -1;
1054		1366
1055	json_stash = gv_stashpv ("JSON::XS", 1);	1367	json_stash = gv_stashpv ("JSON::XS" , 1);
		1368	json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);
		1369
		1370	json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true );
		1371	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);
1056	}	1372	}
1057		1373
1058	PROTOTYPES: DISABLE	1374	PROTOTYPES: DISABLE
1059		1375
1060	SV new (char dummy)	1376	void CLONE (...)
1061	CODE:	1377	CODE:
1062	RETVAL = sv_bless (newRV_noinc (newSVuv (F_DEFAULT)), json_stash);	1378	json_stash = 0;
1063	OUTPUT:	1379	json_boolean_stash = 0;
1064	RETVAL
1065		1380
		1381	void new (char *klass)
		1382	PPCODE:
		1383	{
		1384	HV *stash = !JSON_SLOW \|\| json_stash
		1385	? json_stash
		1386	: gv_stashpv ("JSON::XS", 1);
		1387	SV *pv = NEWSV (0, sizeof (JSON));
		1388	SvPOK_only (pv);
		1389	Zero (SvPVX (pv), 1, JSON);
		1390	((JSON *)SvPVX (pv))->flags = F_DEFAULT;
		1391	XPUSHs (sv_2mortal (sv_bless (newRV_noinc (pv), stash)));
		1392	}
		1393
1066	SV ascii (SV self, int enable = 1)	1394	void ascii (JSON *self, int enable = 1)
1067	ALIAS:	1395	ALIAS:
1068	ascii = F_ASCII	1396	ascii = F_ASCII
		1397	latin1 = F_LATIN1
1069	utf8 = F_UTF8	1398	utf8 = F_UTF8
1070	indent = F_INDENT	1399	indent = F_INDENT
1071	canonical = F_CANONICAL	1400	canonical = F_CANONICAL
1072	space_before = F_SPACE_BEFORE	1401	space_before = F_SPACE_BEFORE
1073	space_after = F_SPACE_AFTER	1402	space_after = F_SPACE_AFTER
1074	pretty = F_PRETTY	1403	pretty = F_PRETTY
1075	allow_nonref = F_ALLOW_NONREF	1404	allow_nonref = F_ALLOW_NONREF
1076	shrink = F_SHRINK	1405	shrink = F_SHRINK
		1406	allow_blessed = F_ALLOW_BLESSED
		1407	convert_blessed = F_CONV_BLESSED
1077	CODE:	1408	PPCODE:
1078	{	1409	{
1079	UV *uv = SvJSON (self);
1080	if (enable)	1410	if (enable)
1081	*uv \|= ix;	1411	self->flags \|= ix;
1082	else	1412	else
1083	*uv &= ~ix;	1413	self->flags &= ~ix;
1084		1414
1085	RETVAL = newSVsv (self);	1415	XPUSHs (ST (0));
1086	}	1416	}
1087	OUTPUT:
1088	RETVAL
1089		1417
1090	SV max_depth (SV self, UV max_depth = 0x80000000UL)	1418	void max_depth (JSON *self, UV max_depth = 0x80000000UL)
1091	CODE:	1419	PPCODE:
1092	{	1420	{
1093	UV *uv = SvJSON (self);
1094	UV log2 = 0;	1421	UV log2 = 0;
1095		1422
1096	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;	1423	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;
1097		1424
1098	while ((1UL << log2) < max_depth)	1425	while ((1UL << log2) < max_depth)
1099	++log2;	1426	++log2;
1100		1427
1101	uv = uv & ~F_MAXDEPTH \| (log2 << S_MAXDEPTH);	1428	self->flags = self->flags & ~F_MAXDEPTH \| (log2 << S_MAXDEPTH);
1102		1429
1103	RETVAL = newSVsv (self);	1430	XPUSHs (ST (0));
1104	}	1431	}
1105	OUTPUT:
1106	RETVAL
1107		1432
1108	void encode (SV self, SV scalar)	1433	void max_size (JSON *self, UV max_size = 0)
1109	PPCODE:	1434	PPCODE:
1110	XPUSHs (encode_json (scalar, *SvJSON (self)));	1435	{
		1436	UV log2 = 0;
1111		1437
1112	void decode (SV self, SV jsonstr)	1438	if (max_size > 0x80000000UL) max_size = 0x80000000UL;
		1439	if (max_size == 1) max_size = 2;
		1440
		1441	while ((1UL << log2) < max_size)
		1442	++log2;
		1443
		1444	self->flags = self->flags & ~F_MAXSIZE \| (log2 << S_MAXSIZE);
		1445
		1446	XPUSHs (ST (0));
		1447	}
		1448
		1449	void filter_json_object (JSON self, SV cb = &PL_sv_undef)
1113	PPCODE:	1450	PPCODE:
		1451	{
		1452	SvREFCNT_dec (self->cb_object);
		1453	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;
		1454
		1455	XPUSHs (ST (0));
		1456	}
		1457
		1458	void filter_json_single_key_object (JSON self, SV key, SV *cb = &PL_sv_undef)
		1459	PPCODE:
		1460	{
		1461	if (!self->cb_sk_object)
		1462	self->cb_sk_object = newHV ();
		1463
		1464	if (SvOK (cb))
		1465	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
		1466	else
		1467	{
		1468	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
		1469
		1470	if (!HvKEYS (self->cb_sk_object))
		1471	{
		1472	SvREFCNT_dec (self->cb_sk_object);
		1473	self->cb_sk_object = 0;
		1474	}
		1475	}
		1476
		1477	XPUSHs (ST (0));
		1478	}
		1479
		1480	void encode (JSON self, SV scalar)
		1481	PPCODE:
		1482	XPUSHs (encode_json (scalar, self));
		1483
		1484	void decode (JSON self, SV jsonstr)
		1485	PPCODE:
1114	XPUSHs (decode_json (jsonstr, *SvJSON (self)));	1486	XPUSHs (decode_json (jsonstr, self, 0));
		1487
		1488	void decode_prefix (JSON self, SV jsonstr)
		1489	PPCODE:
		1490	{
		1491	UV offset;
		1492	EXTEND (SP, 2);
		1493	PUSHs (decode_json (jsonstr, self, &offset));
		1494	PUSHs (sv_2mortal (newSVuv (offset)));
		1495	}
		1496
		1497	void DESTROY (JSON *self)
		1498	CODE:
		1499	SvREFCNT_dec (self->cb_sk_object);
		1500	SvREFCNT_dec (self->cb_object);
1115		1501
1116	PROTOTYPES: ENABLE	1502	PROTOTYPES: ENABLE
1117		1503
1118	void to_json (SV *scalar)	1504	void to_json (SV *scalar)
1119	ALIAS:
1120	objToJson = 0
1121	PPCODE:	1505	PPCODE:
		1506	{
		1507	JSON json = { F_DEFAULT \| F_UTF8 };
1122	XPUSHs (encode_json (scalar, F_DEFAULT \| F_UTF8));	1508	XPUSHs (encode_json (scalar, &json));
		1509	}
1123		1510
1124	void from_json (SV *jsonstr)	1511	void from_json (SV *jsonstr)
1125	ALIAS:
1126	jsonToObj = 0
1127	PPCODE:	1512	PPCODE:
		1513	{
		1514	JSON json = { F_DEFAULT \| F_UTF8 };
1128	XPUSHs (decode_json (jsonstr, F_DEFAULT \| F_UTF8));	1515	XPUSHs (decode_json (jsonstr, &json, 0));
		1516	}
1129		1517

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Comparing JSON-XS/XS.xs (file contents): Revision 1.27 by root, Mon Apr 9 05:09:57 2007 UTC vs. Revision 1.57 by root, Mon Aug 13 16:05:42 2007 UTC

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Comparing JSON-XS/XS.xs (file contents):
Revision 1.27 by root, Mon Apr 9 05:09:57 2007 UTC vs.
Revision 1.57 by root, Mon Aug 13 16:05:42 2007 UTC