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

Comparing JSON-XS/XS.xs (file contents):
Revision 1.40 by root, Tue Jun 12 01:27:02 2007 UTC vs.
Revision 1.62 by root, Sun Aug 26 22:27:32 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
15	#define F_LATIN1 0x00000002UL	22	#define F_LATIN1 0x00000002UL
16	#define F_UTF8 0x00000004UL	23	#define F_UTF8 0x00000004UL
17	#define F_INDENT 0x00000008UL	24	#define F_INDENT 0x00000008UL
18	#define F_CANONICAL 0x00000010UL	25	#define F_CANONICAL 0x00000010UL
19	#define F_SPACE_BEFORE 0x00000020UL	26	#define F_SPACE_BEFORE 0x00000020UL
20	#define F_SPACE_AFTER 0x00000040UL	27	#define F_SPACE_AFTER 0x00000040UL
21	#define F_ALLOW_NONREF 0x00000100UL	28	#define F_ALLOW_NONREF 0x00000100UL
22	#define F_SHRINK 0x00000200UL	29	#define F_SHRINK 0x00000200UL
		30	#define F_ALLOW_BLESSED 0x00000400UL
		31	#define F_CONV_BLESSED 0x00000800UL
23	#define F_MAXDEPTH 0xf8000000UL	32	#define F_MAXDEPTH 0xf8000000UL
24	#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
25		37
26	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))	38	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
27		39	#define DEC_SIZE(flags) (1UL << ((flags & F_MAXSIZE ) >> S_MAXSIZE ))
28	// F_SELFCONVERT? <=> to_json/toJson
29	// F_BLESSED? <=> { $__class__$ => }
30		40
31	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER	41	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER
32	#define F_DEFAULT (9UL << S_MAXDEPTH)	42	#define F_DEFAULT (9UL << S_MAXDEPTH)
33		43
34	#define INIT_SIZE 32 // initial scalar size to be allocated	44	#define INIT_SIZE 32 // initial scalar size to be allocated
48	#endif	58	#endif
49		59
50	#define expect_false(expr) expect ((expr) != 0, 0)	60	#define expect_false(expr) expect ((expr) != 0, 0)
51	#define expect_true(expr) expect ((expr) != 0, 1)	61	#define expect_true(expr) expect ((expr) != 0, 1)
52		62
		63	#ifdef USE_ITHREADS
		64	# define JSON_SLOW 1
		65	# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1))
		66	#else
		67	# define JSON_SLOW 0
		68	# define JSON_STASH json_stash
		69	#endif
		70
53	static HV *json_stash; // JSON::XS::	71	static HV json_stash, json_boolean_stash; // JSON::XS::
		72	static SV json_true, json_false;
		73
		74	typedef struct {
		75	U32 flags;
		76	SV *cb_object;
		77	HV *cb_sk_object;
		78	} JSON;
54		79
55	/////////////////////////////////////////////////////////////////////////////	80	/////////////////////////////////////////////////////////////////////////////
56	// utility functions	81	// utility functions
57		82
58	static UV *	83	inline void
59	SvJSON (SV *sv)
60	{
61	if (!(SvROK (sv) && SvOBJECT (SvRV (sv)) && SvSTASH (SvRV (sv)) == json_stash))
62	croak ("object is not of type JSON::XS");
63
64	return &SvUVX (SvRV (sv));
65	}
66
67	static void
68	shrink (SV *sv)	84	shrink (SV *sv)
69	{	85	{
70	sv_utf8_downgrade (sv, 1);	86	sv_utf8_downgrade (sv, 1);
71	if (SvLEN (sv) > SvCUR (sv) + 1)	87	if (SvLEN (sv) > SvCUR (sv) + 1)
72	{	88	{
…		…
107	typedef struct	123	typedef struct
108	{	124	{
109	char *cur; // SvPVX (sv) + current output position	125	char *cur; // SvPVX (sv) + current output position
110	char *end; // SvEND (sv)	126	char *end; // SvEND (sv)
111	SV *sv; // result scalar	127	SV *sv; // result scalar
112	U32 flags; // F_*	128	JSON json;
113	U32 indent; // indentation level	129	U32 indent; // indentation level
114	U32 maxdepth; // max. indentation/recursion level	130	U32 maxdepth; // max. indentation/recursion level
115	} enc_t;	131	} enc_t;
116		132
117	inline void	133	inline void
…		…
191	}	207	}
192		208
193	if (uch > 0x10FFFFUL)	209	if (uch > 0x10FFFFUL)
194	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);	210	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
195		211
196	if (uch < 0x80 \|\| enc->flags & F_ASCII \|\| (enc->flags & F_LATIN1 && uch > 0xFF))	212	if (uch < 0x80 \|\| enc->json.flags & F_ASCII \|\| (enc->json.flags & F_LATIN1 && uch > 0xFF))
197	{	213	{
198	if (uch > 0xFFFFUL)	214	if (uch > 0xFFFFUL)
199	{	215	{
200	need (enc, len += 11);	216	need (enc, len += 11);
201	sprintf (enc->cur, "\\u%04x\\u%04x",	217	sprintf (enc->cur, "\\u%04x\\u%04x",
…		…
215	*enc->cur++ = hexdigit [(uch >> 0) & 15];	231	*enc->cur++ = hexdigit [(uch >> 0) & 15];
216	}	232	}
217		233
218	str += clen;	234	str += clen;
219	}	235	}
220	else if (enc->flags & F_LATIN1)	236	else if (enc->json.flags & F_LATIN1)
221	{	237	{
222	*enc->cur++ = uch;	238	*enc->cur++ = uch;
223	str += clen;	239	str += clen;
224	}	240	}
225	else if (is_utf8)	241	else if (is_utf8)
…		…
246	}	262	}
247		263
248	inline void	264	inline void
249	encode_indent (enc_t *enc)	265	encode_indent (enc_t *enc)
250	{	266	{
251	if (enc->flags & F_INDENT)	267	if (enc->json.flags & F_INDENT)
252	{	268	{
253	int spaces = enc->indent * INDENT_STEP;	269	int spaces = enc->indent * INDENT_STEP;
254		270
255	need (enc, spaces);	271	need (enc, spaces);
256	memset (enc->cur, ' ', spaces);	272	memset (enc->cur, ' ', spaces);
…		…
266	}	282	}
267		283
268	inline void	284	inline void
269	encode_nl (enc_t *enc)	285	encode_nl (enc_t *enc)
270	{	286	{
271	if (enc->flags & F_INDENT)	287	if (enc->json.flags & F_INDENT)
272	{	288	{
273	need (enc, 1);	289	need (enc, 1);
274	encode_ch (enc, '\n');	290	encode_ch (enc, '\n');
275	}	291	}
276	}	292	}
…		…
278	inline void	294	inline void
279	encode_comma (enc_t *enc)	295	encode_comma (enc_t *enc)
280	{	296	{
281	encode_ch (enc, ',');	297	encode_ch (enc, ',');
282		298
283	if (enc->flags & F_INDENT)	299	if (enc->json.flags & F_INDENT)
284	encode_nl (enc);	300	encode_nl (enc);
285	else if (enc->flags & F_SPACE_AFTER)	301	else if (enc->json.flags & F_SPACE_AFTER)
286	encode_space (enc);	302	encode_space (enc);
287	}	303	}
288		304
289	static void encode_sv (enc_t enc, SV sv);	305	static void encode_sv (enc_t enc, SV sv);
290		306
…		…
299	encode_ch (enc, '['); encode_nl (enc);	315	encode_ch (enc, '['); encode_nl (enc);
300	++enc->indent;	316	++enc->indent;
301		317
302	for (i = 0; i <= len; ++i)	318	for (i = 0; i <= len; ++i)
303	{	319	{
		320	SV **svp = av_fetch (av, i, 0);
		321
304	encode_indent (enc);	322	encode_indent (enc);
305	encode_sv (enc, *av_fetch (av, i, 0));	323
		324	if (svp)
		325	encode_sv (enc, *svp);
		326	else
		327	encode_str (enc, "null", 4, 0);
306		328
307	if (i < len)	329	if (i < len)
308	encode_comma (enc);	330	encode_comma (enc);
309	}	331	}
310		332
…		…
313	--enc->indent;	335	--enc->indent;
314	encode_indent (enc); encode_ch (enc, ']');	336	encode_indent (enc); encode_ch (enc, ']');
315	}	337	}
316		338
317	static void	339	static void
318	encode_he (enc_t enc, HE he)	340	encode_hk (enc_t enc, HE he)
319	{	341	{
320	encode_ch (enc, '"');	342	encode_ch (enc, '"');
321		343
322	if (HeKLEN (he) == HEf_SVKEY)	344	if (HeKLEN (he) == HEf_SVKEY)
323	{	345	{
…		…
333	else	355	else
334	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));	356	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));
335		357
336	encode_ch (enc, '"');	358	encode_ch (enc, '"');
337		359
338	if (enc->flags & F_SPACE_BEFORE) encode_space (enc);	360	if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);
339	encode_ch (enc, ':');	361	encode_ch (enc, ':');
340	if (enc->flags & F_SPACE_AFTER ) encode_space (enc);	362	if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);
341	encode_sv (enc, HeVAL (he));
342	}	363	}
343		364
344	// compare hash entries, used when all keys are bytestrings	365	// compare hash entries, used when all keys are bytestrings
345	static int	366	static int
346	he_cmp_fast (const void a_, const void b_)	367	he_cmp_fast (const void a_, const void b_)
…		…
351	HE b = (HE **)b_;	372	HE b = (HE **)b_;
352		373
353	STRLEN la = HeKLEN (a);	374	STRLEN la = HeKLEN (a);
354	STRLEN lb = HeKLEN (b);	375	STRLEN lb = HeKLEN (b);
355		376
356	if (!(cmp = memcmp (HeKEY (a), HeKEY (b), la < lb ? la : lb)))	377	if (!(cmp = memcmp (HeKEY (b), HeKEY (a), lb < la ? lb : la)))
357	cmp = la - lb;	378	cmp = lb - la;
358		379
359	return cmp;	380	return cmp;
360	}	381	}
361		382
362	// compare hash entries, used when some keys are sv's or utf-x	383	// compare hash entries, used when some keys are sv's or utf-x
363	static int	384	static int
364	he_cmp_slow (const void a, const void b)	385	he_cmp_slow (const void a, const void b)
365	{	386	{
366	return sv_cmp (HeSVKEY_force ((HE )a), HeSVKEY_force ((HE **)b));	387	return sv_cmp (HeSVKEY_force ((HE )b), HeSVKEY_force ((HE **)a));
367	}	388	}
368		389
369	static void	390	static void
370	encode_hv (enc_t enc, HV hv)	391	encode_hv (enc_t enc, HV hv)
371	{	392	{
		393	HE *he;
372	int count, i;	394	int count;
373		395
374	if (enc->indent >= enc->maxdepth)	396	if (enc->indent >= enc->maxdepth)
375	croak ("data structure too deep (hit recursion limit)");	397	croak ("data structure too deep (hit recursion limit)");
376		398
377	encode_ch (enc, '{'); encode_nl (enc); ++enc->indent;	399	encode_ch (enc, '{'); encode_nl (enc); ++enc->indent;
378		400
379	if ((count = hv_iterinit (hv)))
380	{
381	// for canonical output we have to sort by keys first	401	// for canonical output we have to sort by keys first
382	// actually, this is mostly due to the stupid so-called	402	// actually, this is mostly due to the stupid so-called
383	// security workaround added somewhere in 5.8.x.	403	// security workaround added somewhere in 5.8.x.
384	// that randomises hash orderings	404	// that randomises hash orderings
385	if (enc->flags & F_CANONICAL)	405	if (enc->json.flags & F_CANONICAL)
		406	{
		407	int count = hv_iterinit (hv);
		408
		409	if (SvMAGICAL (hv))
386	{	410	{
		411	// need to count by iterating. could improve by dynamically building the vector below
		412	// but I don't care for the speed of this special case.
		413	// note also that we will run into undefined behaviour when the two iterations
		414	// do not result in the same count, something I might care for in some later release.
		415
		416	count = 0;
		417	while (hv_iternext (hv))
		418	++count;
		419
		420	hv_iterinit (hv);
		421	}
		422
		423	if (count)
		424	{
387	int fast = 1;	425	int i, fast = 1;
388	HE *he;
389	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)	426	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)
390	HE *hes = _alloca (count sizeof (HE));	427	HE *hes = _alloca (count sizeof (HE));
391	#else	428	#else
392	HE *hes [count]; // if your compiler dies here, you need to enable C99 mode	429	HE *hes [count]; // if your compiler dies here, you need to enable C99 mode
393	#endif	430	#endif
…		…
420		457
421	FREETMPS;	458	FREETMPS;
422	LEAVE;	459	LEAVE;
423	}	460	}
424		461
425	for (i = 0; i < count; ++i)	462	while (count--)
426	{	463	{
427	encode_indent (enc);	464	encode_indent (enc);
		465	he = hes [count];
428	encode_he (enc, hes [i]);	466	encode_hk (enc, he);
		467	encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
429		468
430	if (i < count - 1)	469	if (count)
431	encode_comma (enc);	470	encode_comma (enc);
432	}	471	}
433		472	}
		473	}
		474	else
		475	{
		476	if (hv_iterinit (hv) \|\| SvMAGICAL (hv))
		477	if ((he = hv_iternext (hv)))
		478	for (;;)
		479	{
434	encode_nl (enc);	480	encode_indent (enc);
		481	encode_hk (enc, he);
		482	encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
		483
		484	if (!(he = hv_iternext (hv)))
		485	break;
		486
		487	encode_comma (enc);
		488	}
		489	}
		490
		491	encode_nl (enc);
		492
		493	--enc->indent; encode_indent (enc); encode_ch (enc, '}');
		494	}
		495
		496	// encode objects, arrays and special \0=false and \1=true values.
		497	static void
		498	encode_rv (enc_t enc, SV sv)
		499	{
		500	svtype svt;
		501
		502	SvGETMAGIC (sv);
		503	svt = SvTYPE (sv);
		504
		505	if (expect_false (SvOBJECT (sv)))
		506	{
		507	HV *stash = !JSON_SLOW \|\| json_boolean_stash
		508	? json_boolean_stash
		509	: gv_stashpv ("JSON::XS::Boolean", 1);
		510
		511	if (SvSTASH (sv) == stash)
		512	{
		513	if (SvIV (sv))
		514	encode_str (enc, "true", 4, 0);
		515	else
		516	encode_str (enc, "false", 5, 0);
435	}	517	}
436	else	518	else
437	{	519	{
438	HE *he = hv_iternext (hv);	520	#if 0
439		521	if (0 && sv_derived_from (rv, "JSON::Literal"))
440	for (;;)
441	{
442	encode_indent (enc);
443	encode_he (enc, he);
444
445	if (!(he = hv_iternext (hv)))
446	break;
447
448	encode_comma (enc);
449	}	522	{
		523	// not yet
		524	}
		525	#endif
		526	if (enc->json.flags & F_CONV_BLESSED)
		527	{
		528	// we re-bless the reference to get overload and other niceties right
		529	GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 0);
450		530
		531	if (to_json)
		532	{
		533	dSP;
		534
		535	ENTER; SAVETMPS; PUSHMARK (SP);
		536	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
		537
		538	// calling with G_SCALAR ensures that we always get a 1 return value
		539	PUTBACK;
		540	call_sv ((SV *)GvCV (to_json), G_SCALAR);
		541	SPAGAIN;
		542
		543	// catch this surprisingly common error
		544	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		545	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		546
		547	sv = POPs;
		548	PUTBACK;
		549
451	encode_nl (enc);	550	encode_sv (enc, sv);
		551
		552	FREETMPS; LEAVE;
		553	}
		554	else if (enc->json.flags & F_ALLOW_BLESSED)
		555	encode_str (enc, "null", 4, 0);
		556	else
		557	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
		558	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		559	}
		560	else if (enc->json.flags & F_ALLOW_BLESSED)
		561	encode_str (enc, "null", 4, 0);
		562	else
		563	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",
		564	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
452	}	565	}
453	}	566	}
454
455	--enc->indent; encode_indent (enc); encode_ch (enc, '}');
456	}
457
458	// encode objects, arrays and special \0=false and \1=true values.
459	static void
460	encode_rv (enc_t enc, SV sv)
461	{
462	svtype svt;
463
464	SvGETMAGIC (sv);
465	svt = SvTYPE (sv);
466
467	if (svt == SVt_PVHV)	567	else if (svt == SVt_PVHV)
468	encode_hv (enc, (HV *)sv);	568	encode_hv (enc, (HV *)sv);
469	else if (svt == SVt_PVAV)	569	else if (svt == SVt_PVAV)
470	encode_av (enc, (AV *)sv);	570	encode_av (enc, (AV *)sv);
471	else if (svt < SVt_PVAV)	571	else if (svt < SVt_PVAV)
472	{	572	{
473	if (SvNIOK (sv) && SvIV (sv) == 0)	573	STRLEN len = 0;
		574	char *pv = svt ? SvPV (sv, len) : 0;
		575
		576	if (len == 1 && *pv == '1')
		577	encode_str (enc, "true", 4, 0);
		578	else if (len == 1 && *pv == '0')
474	encode_str (enc, "false", 5, 0);	579	encode_str (enc, "false", 5, 0);
475	else if (SvNIOK (sv) && SvIV (sv) == 1)
476	encode_str (enc, "true", 4, 0);
477	else	580	else
478	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",	581	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
479	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	582	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
480	}	583	}
481	else	584	else
…		…
551	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",	654	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",
552	SvPV_nolen (sv), SvFLAGS (sv));	655	SvPV_nolen (sv), SvFLAGS (sv));
553	}	656	}
554		657
555	static SV *	658	static SV *
556	encode_json (SV *scalar, U32 flags)	659	encode_json (SV scalar, JSON json)
557	{	660	{
558	enc_t enc;	661	enc_t enc;
559		662
560	if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar))	663	if (!(json->flags & F_ALLOW_NONREF) && !SvROK (scalar))
561	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");	664	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
562		665
563	enc.flags = flags;	666	enc.json = *json;
564	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	667	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
565	enc.cur = SvPVX (enc.sv);	668	enc.cur = SvPVX (enc.sv);
566	enc.end = SvEND (enc.sv);	669	enc.end = SvEND (enc.sv);
567	enc.indent = 0;	670	enc.indent = 0;
568	enc.maxdepth = DEC_DEPTH (flags);	671	enc.maxdepth = DEC_DEPTH (enc.json.flags);
569		672
570	SvPOK_only (enc.sv);	673	SvPOK_only (enc.sv);
571	encode_sv (&enc, scalar);	674	encode_sv (&enc, scalar);
572		675
573	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	676	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
574	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	677	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
575		678
576	if (!(flags & (F_ASCII \| F_LATIN1 \| F_UTF8)))	679	if (!(enc.json.flags & (F_ASCII \| F_LATIN1 \| F_UTF8)))
577	SvUTF8_on (enc.sv);	680	SvUTF8_on (enc.sv);
578		681
579	if (enc.flags & F_SHRINK)	682	if (enc.json.flags & F_SHRINK)
580	shrink (enc.sv);	683	shrink (enc.sv);
581		684
582	return enc.sv;	685	return enc.sv;
583	}	686	}
584		687
…		…
589	typedef struct	692	typedef struct
590	{	693	{
591	char *cur; // current parser pointer	694	char *cur; // current parser pointer
592	char *end; // end of input string	695	char *end; // end of input string
593	const char *err; // parse error, if != 0	696	const char *err; // parse error, if != 0
594	U32 flags; // F_*	697	JSON json;
595	U32 depth; // recursion depth	698	U32 depth; // recursion depth
596	U32 maxdepth; // recursion depth limit	699	U32 maxdepth; // recursion depth limit
597	} dec_t;	700	} dec_t;
598		701
599	inline void	702	inline void
…		…
862	is_nv = 1;	965	is_nv = 1;
863	}	966	}
864		967
865	if (!is_nv)	968	if (!is_nv)
866	{	969	{
		970	int len = dec->cur - start;
		971
867	// special case the rather common 1..4-digit-int case, assumes 32 bit ints or so	972	// special case the rather common 1..4-digit-int case, assumes 32 bit ints or so
868	if (*start == '-')	973	if (*start == '-')
869	switch (dec->cur - start)	974	switch (len)
870	{	975	{
871	case 2: return newSViv (-( start [1] - '0' * 1));	976	case 2: return newSViv (-( start [1] - '0' * 1));
872	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));	977	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));
873	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));	978	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
874	case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));	979	case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
875	}	980	}
876	else	981	else
877	switch (dec->cur - start)	982	switch (len)
878	{	983	{
879	case 1: return newSViv ( start [0] - '0' * 1);	984	case 1: return newSViv ( start [0] - '0' * 1);
880	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);	985	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
881	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);	986	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
882	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);	987	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
883	}	988	}
884		989
885	{	990	{
886	UV uv;	991	UV uv;
887	int numtype = grok_number (start, dec->cur - start, &uv);	992	int numtype = grok_number (start, len, &uv);
888	if (numtype & IS_NUMBER_IN_UV)	993	if (numtype & IS_NUMBER_IN_UV)
889	if (numtype & IS_NUMBER_NEG)	994	if (numtype & IS_NUMBER_NEG)
890	{	995	{
891	if (uv < (UV)IV_MIN)	996	if (uv < (UV)IV_MIN)
892	return newSViv (-(IV)uv);	997	return newSViv (-(IV)uv);
893	}	998	}
894	else	999	else
895	return newSVuv (uv);	1000	return newSVuv (uv);
896
897	// here would likely be the place for bigint support
898	}	1001	}
899	}
900		1002
901	// if we ever support bigint or bigfloat, this is the place for bigfloat	1003	len -= *start == '-' ? 1 : 0;
		1004
		1005	// does not fit into IV or UV, try NV
		1006	if ((sizeof (NV) == sizeof (double) && DBL_DIG >= len)
		1007	#if defined (LDBL_DIG)
		1008	\|\| (sizeof (NV) == sizeof (long double) && LDBL_DIG >= len)
		1009	#endif
		1010	)
		1011	// fits into NV without loss of precision
		1012	return newSVnv (Atof (start));
		1013
		1014	// everything else fails, convert it to a string
		1015	return newSVpvn (start, dec->cur - start);
		1016	}
		1017
		1018	// loss of precision here
902	return newSVnv (Atof (start));	1019	return newSVnv (Atof (start));
903		1020
904	fail:	1021	fail:
905	return 0;	1022	return 0;
906	}	1023	}
…		…
950	}	1067	}
951		1068
952	static SV *	1069	static SV *
953	decode_hv (dec_t *dec)	1070	decode_hv (dec_t *dec)
954	{	1071	{
		1072	SV *sv;
955	HV *hv = newHV ();	1073	HV *hv = newHV ();
956		1074
957	DEC_INC_DEPTH;	1075	DEC_INC_DEPTH;
958	decode_ws (dec);	1076	decode_ws (dec);
959		1077
960	if (*dec->cur == '}')	1078	if (*dec->cur == '}')
961	++dec->cur;	1079	++dec->cur;
962	else	1080	else
963	for (;;)	1081	for (;;)
964	{	1082	{
965	SV key, value;
966
967	decode_ws (dec); EXPECT_CH ('"');	1083	decode_ws (dec); EXPECT_CH ('"');
968		1084
969	key = decode_str (dec);	1085	// heuristic: assume that
970	if (!key)	1086	// a) decode_str + hv_store_ent are abysmally slow.
971	goto fail;	1087	// b) most hash keys are short, simple ascii text.
		1088	// => try to "fast-match" such strings to avoid
		1089	// the overhead of decode_str + hv_store_ent.
		1090	{
		1091	SV *value;
		1092	char *p = dec->cur;
		1093	char *e = p + 24; // only try up to 24 bytes
972		1094
973	decode_ws (dec); EXPECT_CH (':');	1095	for (;;)
974
975	value = decode_sv (dec);
976	if (!value)
977	{	1096	{
		1097	// the >= 0x80 is true on most architectures
		1098	if (p == e \|\| p < 0x20 \|\| p >= 0x80 \|\| *p == '\\')
		1099	{
		1100	// slow path, back up and use decode_str
		1101	SV *key = decode_str (dec);
		1102	if (!key)
		1103	goto fail;
		1104
		1105	decode_ws (dec); EXPECT_CH (':');
		1106
		1107	value = decode_sv (dec);
		1108	if (!value)
		1109	{
		1110	SvREFCNT_dec (key);
		1111	goto fail;
		1112	}
		1113
		1114	hv_store_ent (hv, key, value, 0);
978	SvREFCNT_dec (key);	1115	SvREFCNT_dec (key);
		1116
		1117	break;
		1118	}
		1119	else if (*p == '"')
		1120	{
		1121	// fast path, got a simple key
		1122	char *key = dec->cur;
		1123	int len = p - key;
		1124	dec->cur = p + 1;
		1125
		1126	decode_ws (dec); EXPECT_CH (':');
		1127
		1128	value = decode_sv (dec);
		1129	if (!value)
979	goto fail;	1130	goto fail;
		1131
		1132	hv_store (hv, key, len, value, 0);
		1133
		1134	break;
		1135	}
		1136
		1137	++p;
980	}	1138	}
981		1139	}
982	hv_store_ent (hv, key, value, 0);
983	SvREFCNT_dec (key);
984		1140
985	decode_ws (dec);	1141	decode_ws (dec);
986		1142
987	if (*dec->cur == '}')	1143	if (*dec->cur == '}')
988	{	1144	{
…		…
995		1151
996	++dec->cur;	1152	++dec->cur;
997	}	1153	}
998		1154
999	DEC_DEC_DEPTH;	1155	DEC_DEC_DEPTH;
1000	return newRV_noinc ((SV *)hv);	1156	sv = newRV_noinc ((SV *)hv);
		1157
		1158	// check filter callbacks
		1159	if (dec->json.flags & F_HOOK)
		1160	{
		1161	if (dec->json.cb_sk_object && HvKEYS (hv) == 1)
		1162	{
		1163	HE cb, he;
		1164
		1165	hv_iterinit (hv);
		1166	he = hv_iternext (hv);
		1167	hv_iterinit (hv);
		1168
		1169	// the next line creates a mortal sv each time its called.
		1170	// might want to optimise this for common cases.
		1171	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);
		1172
		1173	if (cb)
		1174	{
		1175	dSP;
		1176	int count;
		1177
		1178	ENTER; SAVETMPS; PUSHMARK (SP);
		1179	XPUSHs (HeVAL (he));
		1180
		1181	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
		1182
		1183	if (count == 1)
		1184	{
		1185	sv = newSVsv (POPs);
		1186	FREETMPS; LEAVE;
		1187	return sv;
		1188	}
		1189
		1190	FREETMPS; LEAVE;
		1191	}
		1192	}
		1193
		1194	if (dec->json.cb_object)
		1195	{
		1196	dSP;
		1197	int count;
		1198
		1199	ENTER; SAVETMPS; PUSHMARK (SP);
		1200	XPUSHs (sv_2mortal (sv));
		1201
		1202	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;
		1203
		1204	if (count == 1)
		1205	{
		1206	sv = newSVsv (POPs);
		1207	FREETMPS; LEAVE;
		1208	return sv;
		1209	}
		1210
		1211	SvREFCNT_inc (sv);
		1212	FREETMPS; LEAVE;
		1213	}
		1214	}
		1215
		1216	return sv;
1001		1217
1002	fail:	1218	fail:
1003	SvREFCNT_dec (hv);	1219	SvREFCNT_dec (hv);
1004	DEC_DEC_DEPTH;	1220	DEC_DEC_DEPTH;
1005	return 0;	1221	return 0;
…		…
1025		1241
1026	case 't':	1242	case 't':
1027	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1243	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
1028	{	1244	{
1029	dec->cur += 4;	1245	dec->cur += 4;
1030	return newSViv (1);	1246	#if JSON_SLOW
		1247	json_true = get_sv ("JSON::XS::true", 1); SvREADONLY_on (json_true);
		1248	#endif
		1249	return SvREFCNT_inc (json_true);
1031	}	1250	}
1032	else	1251	else
1033	ERR ("'true' expected");	1252	ERR ("'true' expected");
1034		1253
1035	break;	1254	break;
1036		1255
1037	case 'f':	1256	case 'f':
1038	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))	1257	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
1039	{	1258	{
1040	dec->cur += 5;	1259	dec->cur += 5;
1041	return newSViv (0);	1260	#if JSON_SLOW
		1261	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);
		1262	#endif
		1263	return SvREFCNT_inc (json_false);
1042	}	1264	}
1043	else	1265	else
1044	ERR ("'false' expected");	1266	ERR ("'false' expected");
1045		1267
1046	break;	1268	break;
…		…
1064	fail:	1286	fail:
1065	return 0;	1287	return 0;
1066	}	1288	}
1067		1289
1068	static SV *	1290	static SV *
1069	decode_json (SV string, U32 flags, UV offset_return)	1291	decode_json (SV string, JSON json, UV *offset_return)
1070	{	1292	{
1071	dec_t dec;	1293	dec_t dec;
1072	UV offset;	1294	UV offset;
1073	SV *sv;	1295	SV *sv;
1074		1296
1075	SvGETMAGIC (string);	1297	SvGETMAGIC (string);
1076	SvUPGRADE (string, SVt_PV);	1298	SvUPGRADE (string, SVt_PV);
1077		1299
		1300	if (json->flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (json->flags))
		1301	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		1302	(unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (json->flags));
		1303
1078	if (flags & F_UTF8)	1304	if (json->flags & F_UTF8)
1079	sv_utf8_downgrade (string, 0);	1305	sv_utf8_downgrade (string, 0);
1080	else	1306	else
1081	sv_utf8_upgrade (string);	1307	sv_utf8_upgrade (string);
1082		1308
1083	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1309	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
1084		1310
1085	dec.flags = flags;	1311	dec.json = *json;
1086	dec.cur = SvPVX (string);	1312	dec.cur = SvPVX (string);
1087	dec.end = SvEND (string);	1313	dec.end = SvEND (string);
1088	dec.err = 0;	1314	dec.err = 0;
1089	dec.depth = 0;	1315	dec.depth = 0;
1090	dec.maxdepth = DEC_DEPTH (dec.flags);	1316	dec.maxdepth = DEC_DEPTH (dec.json.flags);
		1317
		1318	if (dec.json.cb_object \|\| dec.json.cb_sk_object)
		1319	dec.json.flags \|= F_HOOK;
1091		1320
1092	*dec.end = 0; // this should basically be a nop, too, but make sure it's there	1321	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
1093	sv = decode_sv (&dec);	1322	sv = decode_sv (&dec);
1094		1323
1095	if (!(offset_return \|\| !sv))	1324	if (!(offset_return \|\| !sv))
…		…
1105	}	1334	}
1106	}	1335	}
1107		1336
1108	if (offset_return \|\| !sv)	1337	if (offset_return \|\| !sv)
1109	{	1338	{
1110	offset = dec.flags & F_UTF8	1339	offset = dec.json.flags & F_UTF8
1111	? dec.cur - SvPVX (string)	1340	? dec.cur - SvPVX (string)
1112	: utf8_distance (dec.cur, SvPVX (string));	1341	: utf8_distance (dec.cur, SvPVX (string));
1113		1342
1114	if (offset_return)	1343	if (offset_return)
1115	*offset_return = offset;	1344	*offset_return = offset;
…		…
1134	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1363	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
1135	}	1364	}
1136		1365
1137	sv = sv_2mortal (sv);	1366	sv = sv_2mortal (sv);
1138		1367
1139	if (!(dec.flags & F_ALLOW_NONREF) && !SvROK (sv))	1368	if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))
1140	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");	1369	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
1141		1370
1142	return sv;	1371	return sv;
1143	}	1372	}
1144		1373
…		…
1156	i >= '0' && i <= '9' ? i - '0'	1385	i >= '0' && i <= '9' ? i - '0'
1157	: i >= 'a' && i <= 'f' ? i - 'a' + 10	1386	: i >= 'a' && i <= 'f' ? i - 'a' + 10
1158	: i >= 'A' && i <= 'F' ? i - 'A' + 10	1387	: i >= 'A' && i <= 'F' ? i - 'A' + 10
1159	: -1;	1388	: -1;
1160		1389
1161	json_stash = gv_stashpv ("JSON::XS", 1);	1390	json_stash = gv_stashpv ("JSON::XS" , 1);
		1391	json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);
		1392
		1393	json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true );
		1394	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);
1162	}	1395	}
1163		1396
1164	PROTOTYPES: DISABLE	1397	PROTOTYPES: DISABLE
1165		1398
1166	SV new (char dummy)	1399	void CLONE (...)
1167	CODE:	1400	CODE:
1168	RETVAL = sv_bless (newRV_noinc (newSVuv (F_DEFAULT)), json_stash);	1401	json_stash = 0;
1169	OUTPUT:	1402	json_boolean_stash = 0;
1170	RETVAL
1171		1403
		1404	void new (char *klass)
		1405	PPCODE:
		1406	{
		1407	SV *pv = NEWSV (0, sizeof (JSON));
		1408	SvPOK_only (pv);
		1409	Zero (SvPVX (pv), 1, JSON);
		1410	((JSON *)SvPVX (pv))->flags = F_DEFAULT;
		1411	XPUSHs (sv_2mortal (sv_bless (newRV_noinc (pv), JSON_STASH)));
		1412	}
		1413
1172	SV ascii (SV self, int enable = 1)	1414	void ascii (JSON *self, int enable = 1)
1173	ALIAS:	1415	ALIAS:
1174	ascii = F_ASCII	1416	ascii = F_ASCII
1175	latin1 = F_LATIN1	1417	latin1 = F_LATIN1
1176	utf8 = F_UTF8	1418	utf8 = F_UTF8
1177	indent = F_INDENT	1419	indent = F_INDENT
1178	canonical = F_CANONICAL	1420	canonical = F_CANONICAL
1179	space_before = F_SPACE_BEFORE	1421	space_before = F_SPACE_BEFORE
1180	space_after = F_SPACE_AFTER	1422	space_after = F_SPACE_AFTER
1181	pretty = F_PRETTY	1423	pretty = F_PRETTY
1182	allow_nonref = F_ALLOW_NONREF	1424	allow_nonref = F_ALLOW_NONREF
1183	shrink = F_SHRINK	1425	shrink = F_SHRINK
		1426	allow_blessed = F_ALLOW_BLESSED
		1427	convert_blessed = F_CONV_BLESSED
1184	CODE:	1428	PPCODE:
1185	{	1429	{
1186	UV *uv = SvJSON (self);
1187	if (enable)	1430	if (enable)
1188	*uv \|= ix;	1431	self->flags \|= ix;
1189	else	1432	else
1190	*uv &= ~ix;	1433	self->flags &= ~ix;
1191		1434
1192	RETVAL = newSVsv (self);	1435	XPUSHs (ST (0));
1193	}	1436	}
1194	OUTPUT:
1195	RETVAL
1196		1437
1197	SV max_depth (SV self, UV max_depth = 0x80000000UL)	1438	void max_depth (JSON *self, UV max_depth = 0x80000000UL)
1198	CODE:	1439	PPCODE:
1199	{	1440	{
1200	UV *uv = SvJSON (self);
1201	UV log2 = 0;	1441	UV log2 = 0;
1202		1442
1203	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;	1443	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;
1204		1444
1205	while ((1UL << log2) < max_depth)	1445	while ((1UL << log2) < max_depth)
1206	++log2;	1446	++log2;
1207		1447
1208	uv = uv & ~F_MAXDEPTH \| (log2 << S_MAXDEPTH);	1448	self->flags = self->flags & ~F_MAXDEPTH \| (log2 << S_MAXDEPTH);
1209		1449
1210	RETVAL = newSVsv (self);	1450	XPUSHs (ST (0));
1211	}	1451	}
1212	OUTPUT:
1213	RETVAL
1214		1452
1215	void encode (SV self, SV scalar)	1453	void max_size (JSON *self, UV max_size = 0)
1216	PPCODE:	1454	PPCODE:
1217	XPUSHs (encode_json (scalar, *SvJSON (self)));	1455	{
		1456	UV log2 = 0;
1218		1457
1219	void decode (SV self, SV jsonstr)	1458	if (max_size > 0x80000000UL) max_size = 0x80000000UL;
		1459	if (max_size == 1) max_size = 2;
		1460
		1461	while ((1UL << log2) < max_size)
		1462	++log2;
		1463
		1464	self->flags = self->flags & ~F_MAXSIZE \| (log2 << S_MAXSIZE);
		1465
		1466	XPUSHs (ST (0));
		1467	}
		1468
		1469	void filter_json_object (JSON self, SV cb = &PL_sv_undef)
1220	PPCODE:	1470	PPCODE:
		1471	{
		1472	SvREFCNT_dec (self->cb_object);
		1473	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;
		1474
		1475	XPUSHs (ST (0));
		1476	}
		1477
		1478	void filter_json_single_key_object (JSON self, SV key, SV *cb = &PL_sv_undef)
		1479	PPCODE:
		1480	{
		1481	if (!self->cb_sk_object)
		1482	self->cb_sk_object = newHV ();
		1483
		1484	if (SvOK (cb))
		1485	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
		1486	else
		1487	{
		1488	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
		1489
		1490	if (!HvKEYS (self->cb_sk_object))
		1491	{
		1492	SvREFCNT_dec (self->cb_sk_object);
		1493	self->cb_sk_object = 0;
		1494	}
		1495	}
		1496
		1497	XPUSHs (ST (0));
		1498	}
		1499
		1500	void encode (JSON self, SV scalar)
		1501	PPCODE:
		1502	XPUSHs (encode_json (scalar, self));
		1503
		1504	void decode (JSON self, SV jsonstr)
		1505	PPCODE:
1221	XPUSHs (decode_json (jsonstr, *SvJSON (self), 0));	1506	XPUSHs (decode_json (jsonstr, self, 0));
1222		1507
1223	void decode_prefix (SV self, SV jsonstr)	1508	void decode_prefix (JSON self, SV jsonstr)
1224	PPCODE:	1509	PPCODE:
1225	{	1510	{
1226	UV offset;	1511	UV offset;
1227	EXTEND (SP, 2);	1512	EXTEND (SP, 2);
1228	PUSHs (decode_json (jsonstr, *SvJSON (self), &offset));	1513	PUSHs (decode_json (jsonstr, self, &offset));
1229	PUSHs (sv_2mortal (newSVuv (offset)));	1514	PUSHs (sv_2mortal (newSVuv (offset)));
1230	}	1515	}
1231		1516
		1517	void DESTROY (JSON *self)
		1518	CODE:
		1519	SvREFCNT_dec (self->cb_sk_object);
		1520	SvREFCNT_dec (self->cb_object);
		1521
1232	PROTOTYPES: ENABLE	1522	PROTOTYPES: ENABLE
1233		1523
1234	void to_json (SV *scalar)	1524	void to_json (SV *scalar)
1235	ALIAS:
1236	objToJson = 0
1237	PPCODE:	1525	PPCODE:
		1526	{
		1527	JSON json = { F_DEFAULT \| F_UTF8 };
1238	XPUSHs (encode_json (scalar, F_DEFAULT \| F_UTF8));	1528	XPUSHs (encode_json (scalar, &json));
		1529	}
1239		1530
1240	void from_json (SV *jsonstr)	1531	void from_json (SV *jsonstr)
1241	ALIAS:
1242	jsonToObj = 0
1243	PPCODE:	1532	PPCODE:
		1533	{
		1534	JSON json = { F_DEFAULT \| F_UTF8 };
1244	XPUSHs (decode_json (jsonstr, F_DEFAULT \| F_UTF8, 0));	1535	XPUSHs (decode_json (jsonstr, &json, 0));
		1536	}
1245		1537

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Comparing JSON-XS/XS.xs (file contents): Revision 1.40 by root, Tue Jun 12 01:27:02 2007 UTC vs. Revision 1.62 by root, Sun Aug 26 22:27:32 2007 UTC

Diff Legend

Comparing JSON-XS/XS.xs (file contents):
Revision 1.40 by root, Tue Jun 12 01:27:02 2007 UTC vs.
Revision 1.62 by root, Sun Aug 26 22:27:32 2007 UTC