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

Comparing JSON-XS/XS.xs (file contents):
Revision 1.12 by root, Sat Mar 24 22:10:08 2007 UTC vs.
Revision 1.39 by root, Mon Jun 11 03:42:57 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
9	#define F_ASCII 0x00000001	14	#define F_ASCII 0x00000001UL
		15	#define F_LATIN1 0x00000002UL
10	#define F_UTF8 0x00000002	16	#define F_UTF8 0x00000004UL
11	#define F_INDENT 0x00000004	17	#define F_INDENT 0x00000008UL
12	#define F_CANONICAL 0x00000008	18	#define F_CANONICAL 0x00000010UL
13	#define F_SPACE_BEFORE 0x00000010	19	#define F_SPACE_BEFORE 0x00000020UL
14	#define F_SPACE_AFTER 0x00000020	20	#define F_SPACE_AFTER 0x00000040UL
15	#define F_ALLOW_NONREF 0x00000080	21	#define F_ALLOW_NONREF 0x00000100UL
16	#define F_SHRINK 0x00000100	22	#define F_SHRINK 0x00000200UL
		23	#define F_MAXDEPTH 0xf8000000UL
		24	#define S_MAXDEPTH 27
		25
		26	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
		27
		28	// F_SELFCONVERT? <=> to_json/toJson
		29	// F_BLESSED? <=> { $__class__$ => }
17		30
18	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER	31	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER
19	#define F_DEFAULT 0	32	#define F_DEFAULT (9UL << S_MAXDEPTH)
20		33
21	#define INIT_SIZE 32 // initial scalar size to be allocated	34	#define INIT_SIZE 32 // initial scalar size to be allocated
22	#define INDENT_STEP 3 // spaces per indentation level	35	#define INDENT_STEP 3 // spaces per indentation level
23		36
24	#define UTF8_MAX_LEN 11 // for perls UTF-X: max. number of octets per character
25	#define SHORT_STRING_LEN 256 // special-case strings of up to this size	37	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size
26		38
27	#define SB do {	39	#define SB do {
28	#define SE } while (0)	40	#define SE } while (0)
		41
		42	#if __GNUC__ >= 3
		43	# define expect(expr,value) __builtin_expect ((expr),(value))
		44	# define inline inline
		45	#else
		46	# define expect(expr,value) (expr)
		47	# define inline static
		48	#endif
		49
		50	#define expect_false(expr) expect ((expr) != 0, 0)
		51	#define expect_true(expr) expect ((expr) != 0, 1)
29		52
30	static HV *json_stash; // JSON::XS::	53	static HV *json_stash; // JSON::XS::
31		54
32	/////////////////////////////////////////////////////////////////////////////	55	/////////////////////////////////////////////////////////////////////////////
33	// utility functions	56	// utility functions
…		…
53	SvPV_renew (sv, SvCUR (sv) + 1);	76	SvPV_renew (sv, SvCUR (sv) + 1);
54	#endif	77	#endif
55	}	78	}
56	}	79	}
57		80
		81	// decode an utf-8 character and return it, or (UV)-1 in
		82	// case of an error.
		83	// we special-case "safe" characters from U+80 .. U+7FF,
		84	// but use the very good perl function to parse anything else.
		85	// note that we never call this function for a ascii codepoints
		86	inline UV
		87	decode_utf8 (unsigned char s, STRLEN len, STRLEN clen)
		88	{
		89	if (expect_false (s[0] > 0xdf \|\| s[0] < 0xc2))
		90	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);
		91	else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf)
		92	{
		93	*clen = 2;
		94	return ((s[0] & 0x1f) << 6) \| (s[1] & 0x3f);
		95	}
		96	else
		97	{
		98	*clen = (STRLEN)-1;
		99	return (UV)-1;
		100	}
		101	}
		102
58	/////////////////////////////////////////////////////////////////////////////	103	/////////////////////////////////////////////////////////////////////////////
59	// encoder	104	// encoder
60		105
61	// structure used for encoding JSON	106	// structure used for encoding JSON
62	typedef struct	107	typedef struct
63	{	108	{
64	char *cur; // SvPVX (sv) + current output position	109	char *cur; // SvPVX (sv) + current output position
65	char *end; // SvEND (sv)	110	char *end; // SvEND (sv)
66	SV *sv; // result scalar	111	SV *sv; // result scalar
67	UV flags; // F_*	112	U32 flags; // F_*
68	int indent; // indentation level	113	U32 indent; // indentation level
69	int max_depth; // max. recursion level	114	U32 maxdepth; // max. indentation/recursion level
70	} enc_t;	115	} enc_t;
71		116
72	static void	117	inline void
73	need (enc_t *enc, STRLEN len)	118	need (enc_t *enc, STRLEN len)
74	{	119	{
75	if (enc->cur + len >= enc->end)	120	if (expect_false (enc->cur + len >= enc->end))
76	{	121	{
77	STRLEN cur = enc->cur - SvPVX (enc->sv);	122	STRLEN cur = enc->cur - SvPVX (enc->sv);
78	SvGROW (enc->sv, cur + len + 1);	123	SvGROW (enc->sv, cur + len + 1);
79	enc->cur = SvPVX (enc->sv) + cur;	124	enc->cur = SvPVX (enc->sv) + cur;
80	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv);	125	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
81	}	126	}
82	}	127	}
83		128
84	static void	129	inline void
85	encode_ch (enc_t *enc, char ch)	130	encode_ch (enc_t *enc, char ch)
86	{	131	{
87	need (enc, 1);	132	need (enc, 1);
88	*enc->cur++ = ch;	133	*enc->cur++ = ch;
89	}	134	}
…		…
97		142
98	while (str < end)	143	while (str < end)
99	{	144	{
100	unsigned char ch = (unsigned char )str;	145	unsigned char ch = (unsigned char )str;
101		146
102	if (ch >= 0x20 && ch < 0x80) // most common case	147	if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case
103	{	148	{
104	if (ch == '"') // but with slow exceptions	149	if (expect_false (ch == '"')) // but with slow exceptions
105	{	150	{
106	need (enc, len += 1);	151	need (enc, len += 1);
107	*enc->cur++ = '\\';	152	*enc->cur++ = '\\';
108	*enc->cur++ = '"';	153	*enc->cur++ = '"';
109	}	154	}
110	else if (ch == '\\')	155	else if (expect_false (ch == '\\'))
111	{	156	{
112	need (enc, len += 1);	157	need (enc, len += 1);
113	*enc->cur++ = '\\';	158	*enc->cur++ = '\\';
114	*enc->cur++ = '\\';	159	*enc->cur++ = '\\';
115	}	160	}
…		…
133	STRLEN clen;	178	STRLEN clen;
134	UV uch;	179	UV uch;
135		180
136	if (is_utf8)	181	if (is_utf8)
137	{	182	{
138	uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY);	183	//uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY);
		184	uch = decode_utf8 (str, end - str, &clen);
139	if (clen == (STRLEN)-1)	185	if (clen == (STRLEN)-1)
140	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);	186	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);
141	}	187	}
142	else	188	else
143	{	189	{
…		…
146	}	192	}
147		193
148	if (uch > 0x10FFFFUL)	194	if (uch > 0x10FFFFUL)
149	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);	195	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
150		196
151	if (uch < 0x80 \|\| enc->flags & F_ASCII)	197	if (uch < 0x80 \|\| enc->flags & F_ASCII \|\| (enc->flags & F_LATIN1 && uch > 0xFF))
152	{	198	{
153	if (uch > 0xFFFFUL)	199	if (uch > 0xFFFFUL)
154	{	200	{
155	need (enc, len += 11);	201	need (enc, len += 11);
156	sprintf (enc->cur, "\\u%04x\\u%04x",	202	sprintf (enc->cur, "\\u%04x\\u%04x",
…		…
170	*enc->cur++ = hexdigit [(uch >> 0) & 15];	216	*enc->cur++ = hexdigit [(uch >> 0) & 15];
171	}	217	}
172		218
173	str += clen;	219	str += clen;
174	}	220	}
		221	else if (enc->flags & F_LATIN1)
		222	{
		223	*enc->cur++ = uch;
		224	str += clen;
		225	}
175	else if (is_utf8)	226	else if (is_utf8)
176	{	227	{
177	need (enc, len += clen);	228	need (enc, len += clen);
178	do	229	do
179	{	230	{
…		…
181	}	232	}
182	while (--clen);	233	while (--clen);
183	}	234	}
184	else	235	else
185	{	236	{
186	need (enc, len += UTF8_MAX_LEN - 1); // never more than 11 bytes needed	237	need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed
187	enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0);	238	enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0);
188	++str;	239	++str;
189	}	240	}
190	}	241	}
191	}	242	}
…		…
193		244
194	--len;	245	--len;
195	}	246	}
196	}	247	}
197		248
198	static void	249	inline void
199	encode_indent (enc_t *enc)	250	encode_indent (enc_t *enc)
200	{	251	{
201	if (enc->flags & F_INDENT)	252	if (enc->flags & F_INDENT)
202	{	253	{
203	int spaces = enc->indent * INDENT_STEP;	254	int spaces = enc->indent * INDENT_STEP;
…		…
206	memset (enc->cur, ' ', spaces);	257	memset (enc->cur, ' ', spaces);
207	enc->cur += spaces;	258	enc->cur += spaces;
208	}	259	}
209	}	260	}
210		261
211	static void	262	inline void
212	encode_space (enc_t *enc)	263	encode_space (enc_t *enc)
213	{	264	{
214	need (enc, 1);	265	need (enc, 1);
215	encode_ch (enc, ' ');	266	encode_ch (enc, ' ');
216	}	267	}
217		268
218	static void	269	inline void
219	encode_nl (enc_t *enc)	270	encode_nl (enc_t *enc)
220	{	271	{
221	if (enc->flags & F_INDENT)	272	if (enc->flags & F_INDENT)
222	{	273	{
223	need (enc, 1);	274	need (enc, 1);
224	encode_ch (enc, '\n');	275	encode_ch (enc, '\n');
225	}	276	}
226	}	277	}
227		278
228	static void	279	inline void
229	encode_comma (enc_t *enc)	280	encode_comma (enc_t *enc)
230	{	281	{
231	encode_ch (enc, ',');	282	encode_ch (enc, ',');
232		283
233	if (enc->flags & F_INDENT)	284	if (enc->flags & F_INDENT)
…		…
240		291
241	static void	292	static void
242	encode_av (enc_t enc, AV av)	293	encode_av (enc_t enc, AV av)
243	{	294	{
244	int i, len = av_len (av);	295	int i, len = av_len (av);
		296
		297	if (enc->indent >= enc->maxdepth)
		298	croak ("data structure too deep (hit recursion limit)");
245		299
246	encode_ch (enc, '['); encode_nl (enc);	300	encode_ch (enc, '['); encode_nl (enc);
247	++enc->indent;	301	++enc->indent;
248		302
249	for (i = 0; i <= len; ++i)	303	for (i = 0; i <= len; ++i)
…		…
316	static void	370	static void
317	encode_hv (enc_t enc, HV hv)	371	encode_hv (enc_t enc, HV hv)
318	{	372	{
319	int count, i;	373	int count, i;
320		374
		375	if (enc->indent >= enc->maxdepth)
		376	croak ("data structure too deep (hit recursion limit)");
		377
321	encode_ch (enc, '{'); encode_nl (enc); ++enc->indent;	378	encode_ch (enc, '{'); encode_nl (enc); ++enc->indent;
322		379
323	if ((count = hv_iterinit (hv)))	380	if ((count = hv_iterinit (hv)))
324	{	381	{
325	// for canonical output we have to sort by keys first	382	// for canonical output we have to sort by keys first
326	// actually, this is mostly due to the stupid so-called	383	// actually, this is mostly due to the stupid so-called
327	// security workaround added somewhere in 5.8.x.	384	// security workaround added somewhere in 5.8.x.
328	// that randomises hash orderings	385	// that randomises hash orderings
329	if (enc->flags & F_CANONICAL)	386	if (enc->flags & F_CANONICAL)
330	{	387	{
331	HE he, hes [count]; // if your compiler dies here, you need to enable C99 mode
332	int fast = 1;	388	int fast = 1;
		389	HE *he;
		390	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)
		391	HE *hes = _alloca (count sizeof (HE));
		392	#else
		393	HE *hes [count]; // if your compiler dies here, you need to enable C99 mode
		394	#endif
333		395
334	i = 0;	396	i = 0;
335	while ((he = hv_iternext (hv)))	397	while ((he = hv_iternext (hv)))
336	{	398	{
337	hes [i++] = he;	399	hes [i++] = he;
…		…
372		434
373	encode_nl (enc);	435	encode_nl (enc);
374	}	436	}
375	else	437	else
376	{	438	{
377	SV *sv;
378	HE *he = hv_iternext (hv);	439	HE *he = hv_iternext (hv);
379		440
380	for (;;)	441	for (;;)
381	{	442	{
382	encode_indent (enc);	443	encode_indent (enc);
…		…
391	encode_nl (enc);	452	encode_nl (enc);
392	}	453	}
393	}	454	}
394		455
395	--enc->indent; encode_indent (enc); encode_ch (enc, '}');	456	--enc->indent; encode_indent (enc); encode_ch (enc, '}');
		457	}
		458
		459	// encode objects, arrays and special \0=false and \1=true values.
		460	static void
		461	encode_rv (enc_t enc, SV sv)
		462	{
		463	svtype svt;
		464
		465	SvGETMAGIC (sv);
		466	svt = SvTYPE (sv);
		467
		468	if (svt == SVt_PVHV)
		469	encode_hv (enc, (HV *)sv);
		470	else if (svt == SVt_PVAV)
		471	encode_av (enc, (AV *)sv);
		472	else if (svt < SVt_PVAV)
		473	{
		474	if (SvNIOK (sv) && SvIV (sv) == 0)
		475	encode_str (enc, "false", 5, 0);
		476	else if (SvNIOK (sv) && SvIV (sv) == 1)
		477	encode_str (enc, "true", 4, 0);
		478	else
		479	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
		480	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		481	}
		482	else
		483	croak ("encountered %s, but JSON can only represent references to arrays or hashes",
		484	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
396	}	485	}
397		486
398	static void	487	static void
399	encode_sv (enc_t enc, SV sv)	488	encode_sv (enc_t enc, SV sv)
400	{	489	{
…		…
408	encode_str (enc, str, len, SvUTF8 (sv));	497	encode_str (enc, str, len, SvUTF8 (sv));
409	encode_ch (enc, '"');	498	encode_ch (enc, '"');
410	}	499	}
411	else if (SvNOKp (sv))	500	else if (SvNOKp (sv))
412	{	501	{
		502	// trust that perl will do the right thing w.r.t. JSON syntax.
413	need (enc, NV_DIG + 32);	503	need (enc, NV_DIG + 32);
414	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);	504	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
415	enc->cur += strlen (enc->cur);	505	enc->cur += strlen (enc->cur);
416	}	506	}
417	else if (SvIOKp (sv))	507	else if (SvIOKp (sv))
418	{	508	{
419	need (enc, 64);	509	// we assume we can always read an IV as a UV
		510	if (SvUV (sv) & ~(UV)0x7fff)
		511	{
		512	// large integer, use the (rather slow) snprintf way.
		513	need (enc, sizeof (UV) * 3);
420	enc->cur +=	514	enc->cur +=
421	SvIsUV(sv)	515	SvIsUV(sv)
422	? snprintf (enc->cur, 64, "%"UVuf, (UV)SvUVX (sv))	516	? snprintf (enc->cur, sizeof (UV) * 3, "%"UVuf, (UV)SvUVX (sv))
423	: snprintf (enc->cur, 64, "%"IVdf, (IV)SvIVX (sv));	517	: snprintf (enc->cur, sizeof (UV) * 3, "%"IVdf, (IV)SvIVX (sv));
		518	}
		519	else
		520	{
		521	// optimise the "small number case"
		522	// code will likely be branchless and use only a single multiplication
		523	I32 i = SvIV (sv);
		524	U32 u;
		525	char digit, nz = 0;
		526
		527	need (enc, 6);
		528
		529	*enc->cur = '-'; enc->cur += i < 0 ? 1 : 0;
		530	u = i < 0 ? -i : i;
		531
		532	// convert to 4.28 fixed-point representation
		533	u = u * ((0xfffffff + 10000) / 10000); // 10**5, 5 fractional digits
		534
		535	// now output digit by digit, each time masking out the integer part
		536	// and multiplying by 5 while moving the decimal point one to the right,
		537	// resulting in a net multiplication by 10.
		538	// we always write the digit to memory but conditionally increment
		539	// the pointer, to ease the usage of conditional move instructions.
		540	digit = u >> 28; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0xfffffff) 5;
		541	digit = u >> 27; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x7ffffff) 5;
		542	digit = u >> 26; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x3ffffff) 5;
		543	digit = u >> 25; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x1ffffff) 5;
		544	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
		545	}
424	}	546	}
425	else if (SvROK (sv))	547	else if (SvROK (sv))
426	{	548	encode_rv (enc, SvRV (sv));
427	SV *rv = SvRV (sv);
428
429	if (enc->indent >= enc->max_depth)
430	croak ("data structure too deep (hit recursion limit)");
431
432	switch (SvTYPE (rv))
433	{
434	case SVt_PVAV: encode_av (enc, (AV *)rv); break;
435	case SVt_PVHV: encode_hv (enc, (HV *)rv); break;
436
437	default:
438	croak ("encountered %s, but JSON can only represent references to arrays or hashes",
439	SvPV_nolen (sv));
440	}
441	}
442	else if (!SvOK (sv))	549	else if (!SvOK (sv))
443	encode_str (enc, "null", 4, 0);	550	encode_str (enc, "null", 4, 0);
444	else	551	else
445	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",	552	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",
446	SvPV_nolen (sv), SvFLAGS (sv));	553	SvPV_nolen (sv), SvFLAGS (sv));
447	}	554	}
448		555
449	static SV *	556	static SV *
450	encode_json (SV *scalar, UV flags)	557	encode_json (SV *scalar, U32 flags)
451	{	558	{
		559	enc_t enc;
		560
452	if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar))	561	if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar))
453	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");	562	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
454		563
455	enc_t enc;
456	enc.flags = flags;	564	enc.flags = flags;
457	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	565	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
458	enc.cur = SvPVX (enc.sv);	566	enc.cur = SvPVX (enc.sv);
459	enc.end = SvEND (enc.sv);	567	enc.end = SvEND (enc.sv);
460	enc.indent = 0;	568	enc.indent = 0;
461	enc.max_depth = 0x7fffffffUL;	569	enc.maxdepth = DEC_DEPTH (flags);
462		570
463	SvPOK_only (enc.sv);	571	SvPOK_only (enc.sv);
464	encode_sv (&enc, scalar);	572	encode_sv (&enc, scalar);
465		573
		574	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
		575	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
		576
466	if (!(flags & (F_ASCII \| F_UTF8)))	577	if (!(flags & (F_ASCII \| F_LATIN1 \| F_UTF8)))
467	SvUTF8_on (enc.sv);	578	SvUTF8_on (enc.sv);
468
469	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
470		579
471	if (enc.flags & F_SHRINK)	580	if (enc.flags & F_SHRINK)
472	shrink (enc.sv);	581	shrink (enc.sv);
473		582
474	return enc.sv;	583	return enc.sv;
…		…
481	typedef struct	590	typedef struct
482	{	591	{
483	char *cur; // current parser pointer	592	char *cur; // current parser pointer
484	char *end; // end of input string	593	char *end; // end of input string
485	const char *err; // parse error, if != 0	594	const char *err; // parse error, if != 0
486	UV flags; // F_*	595	U32 flags; // F_*
		596	U32 depth; // recursion depth
		597	U32 maxdepth; // recursion depth limit
487	} dec_t;	598	} dec_t;
488		599
489	static void	600	inline void
490	decode_ws (dec_t *dec)	601	decode_ws (dec_t *dec)
491	{	602	{
492	for (;;)	603	for (;;)
493	{	604	{
494	char ch = *dec->cur;	605	char ch = *dec->cur;
…		…
500	++dec->cur;	611	++dec->cur;
501	}	612	}
502	}	613	}
503		614
504	#define ERR(reason) SB dec->err = reason; goto fail; SE	615	#define ERR(reason) SB dec->err = reason; goto fail; SE
		616
505	#define EXPECT_CH(ch) SB \	617	#define EXPECT_CH(ch) SB \
506	if (*dec->cur != ch) \	618	if (*dec->cur != ch) \
507	ERR (# ch " expected"); \	619	ERR (# ch " expected"); \
508	++dec->cur; \	620	++dec->cur; \
509	SE	621	SE
510		622
		623	#define DEC_INC_DEPTH if (++dec->depth > dec->maxdepth) ERR ("json datastructure exceeds maximum nesting level (set a higher max_depth)")
		624	#define DEC_DEC_DEPTH --dec->depth
		625
511	static SV decode_sv (dec_t dec);	626	static SV decode_sv (dec_t dec);
512		627
513	static signed char decode_hexdigit[256];	628	static signed char decode_hexdigit[256];
514		629
515	static UV	630	static UV
516	decode_4hex (dec_t *dec)	631	decode_4hex (dec_t *dec)
517	{	632	{
518	signed char d1, d2, d3, d4;	633	signed char d1, d2, d3, d4;
519	unsigned char cur = (unsigned char )dec->cur;	634	unsigned char cur = (unsigned char )dec->cur;
520		635
521	d1 = decode_hexdigit [cur [0]]; if (d1 < 0) ERR ("four hexadecimal digits expected");	636	d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("four hexadecimal digits expected");
522	d2 = decode_hexdigit [cur [1]]; if (d2 < 0) ERR ("four hexadecimal digits expected");	637	d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("four hexadecimal digits expected");
523	d3 = decode_hexdigit [cur [2]]; if (d3 < 0) ERR ("four hexadecimal digits expected");	638	d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("four hexadecimal digits expected");
524	d4 = decode_hexdigit [cur [3]]; if (d4 < 0) ERR ("four hexadecimal digits expected");	639	d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("four hexadecimal digits expected");
525		640
526	dec->cur += 4;	641	dec->cur += 4;
527		642
528	return ((UV)d1) << 12	643	return ((UV)d1) << 12
529	\| ((UV)d2) << 8	644	\| ((UV)d2) << 8
…		…
537	static SV *	652	static SV *
538	decode_str (dec_t *dec)	653	decode_str (dec_t *dec)
539	{	654	{
540	SV *sv = 0;	655	SV *sv = 0;
541	int utf8 = 0;	656	int utf8 = 0;
		657	char *dec_cur = dec->cur;
542		658
543	do	659	do
544	{	660	{
545	char buf [SHORT_STRING_LEN + UTF8_MAX_LEN];	661	char buf [SHORT_STRING_LEN + UTF8_MAXBYTES];
546	char *cur = buf;	662	char *cur = buf;
547		663
548	do	664	do
549	{	665	{
550	unsigned char ch = (unsigned char )dec->cur++;	666	unsigned char ch = (unsigned char )dec_cur++;
551		667
552	if (ch == '"')	668	if (expect_false (ch == '"'))
553	{	669	{
554	--dec->cur;	670	--dec_cur;
555	break;	671	break;
556	}	672	}
557	else if (ch == '\\')	673	else if (expect_false (ch == '\\'))
558	{	674	{
559	switch (*dec->cur)	675	switch (*dec_cur)
560	{	676	{
561	case '\\':	677	case '\\':
562	case '/':	678	case '/':
563	case '"': cur++ = dec->cur++; break;	679	case '"': cur++ = dec_cur++; break;
564		680
565	case 'b': ++dec->cur; *cur++ = '\010'; break;	681	case 'b': ++dec_cur; *cur++ = '\010'; break;
566	case 't': ++dec->cur; *cur++ = '\011'; break;	682	case 't': ++dec_cur; *cur++ = '\011'; break;
567	case 'n': ++dec->cur; *cur++ = '\012'; break;	683	case 'n': ++dec_cur; *cur++ = '\012'; break;
568	case 'f': ++dec->cur; *cur++ = '\014'; break;	684	case 'f': ++dec_cur; *cur++ = '\014'; break;
569	case 'r': ++dec->cur; *cur++ = '\015'; break;	685	case 'r': ++dec_cur; *cur++ = '\015'; break;
570		686
571	case 'u':	687	case 'u':
572	{	688	{
573	UV lo, hi;	689	UV lo, hi;
574	++dec->cur;	690	++dec_cur;
575		691
		692	dec->cur = dec_cur;
576	hi = decode_4hex (dec);	693	hi = decode_4hex (dec);
		694	dec_cur = dec->cur;
577	if (hi == (UV)-1)	695	if (hi == (UV)-1)
578	goto fail;	696	goto fail;
579		697
580	// possibly a surrogate pair	698	// possibly a surrogate pair
581	if (hi >= 0xd800)	699	if (hi >= 0xd800)
582	if (hi < 0xdc00)	700	if (hi < 0xdc00)
583	{	701	{
584	if (dec->cur [0] != '\\' \|\| dec->cur [1] != 'u')	702	if (dec_cur [0] != '\\' \|\| dec_cur [1] != 'u')
585	ERR ("missing low surrogate character in surrogate pair");	703	ERR ("missing low surrogate character in surrogate pair");
586		704
587	dec->cur += 2;	705	dec_cur += 2;
588		706
		707	dec->cur = dec_cur;
589	lo = decode_4hex (dec);	708	lo = decode_4hex (dec);
		709	dec_cur = dec->cur;
590	if (lo == (UV)-1)	710	if (lo == (UV)-1)
591	goto fail;	711	goto fail;
592		712
593	if (lo < 0xdc00 \|\| lo >= 0xe000)	713	if (lo < 0xdc00 \|\| lo >= 0xe000)
594	ERR ("surrogate pair expected");	714	ERR ("surrogate pair expected");
…		…
608	*cur++ = hi;	728	*cur++ = hi;
609	}	729	}
610	break;	730	break;
611		731
612	default:	732	default:
613	--dec->cur;	733	--dec_cur;
614	ERR ("illegal backslash escape sequence in string");	734	ERR ("illegal backslash escape sequence in string");
615	}	735	}
616	}	736	}
617	else if (ch >= 0x20 && ch <= 0x7f)	737	else if (expect_true (ch >= 0x20 && ch <= 0x7f))
618	*cur++ = ch;	738	*cur++ = ch;
619	else if (ch >= 0x80)	739	else if (ch >= 0x80)
620	{	740	{
621	--dec->cur;
622
623	STRLEN clen;	741	STRLEN clen;
624	UV uch = utf8n_to_uvuni (dec->cur, dec->end - dec->cur, &clen, UTF8_CHECK_ONLY);	742	UV uch;
		743
		744	--dec_cur;
		745
		746	uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
625	if (clen == (STRLEN)-1)	747	if (clen == (STRLEN)-1)
626	ERR ("malformed UTF-8 character in JSON string");	748	ERR ("malformed UTF-8 character in JSON string");
627		749
628	do	750	do
629	{
630	cur++ = dec->cur++;	751	cur++ = dec_cur++;
631	}
632	while (--clen);	752	while (--clen);
633		753
634	utf8 = 1;	754	utf8 = 1;
635	}	755	}
636	else if (!ch)
637	ERR ("unexpected end of string while parsing json string");
638	else	756	else
		757	{
		758	--dec_cur;
		759
		760	if (!ch)
		761	ERR ("unexpected end of string while parsing JSON string");
		762	else
639	ERR ("invalid character encountered");	763	ERR ("invalid character encountered while parsing JSON string");
640		764	}
641	}	765	}
642	while (cur < buf + SHORT_STRING_LEN);	766	while (cur < buf + SHORT_STRING_LEN);
643		767
		768	{
644	STRLEN len = cur - buf;	769	STRLEN len = cur - buf;
645		770
646	if (sv)	771	if (sv)
647	{	772	{
648	SvGROW (sv, SvCUR (sv) + len + 1);	773	SvGROW (sv, SvCUR (sv) + len + 1);
649	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);	774	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);
650	SvCUR_set (sv, SvCUR (sv) + len);	775	SvCUR_set (sv, SvCUR (sv) + len);
651	}	776	}
652	else	777	else
653	sv = newSVpvn (buf, len);	778	sv = newSVpvn (buf, len);
654	}	779	}
		780	}
655	while (*dec->cur != '"');	781	while (*dec_cur != '"');
656		782
657	++dec->cur;	783	++dec_cur;
658		784
659	if (sv)	785	if (sv)
660	{	786	{
661	SvPOK_only (sv);	787	SvPOK_only (sv);
662	*SvEND (sv) = 0;	788	*SvEND (sv) = 0;
…		…
665	SvUTF8_on (sv);	791	SvUTF8_on (sv);
666	}	792	}
667	else	793	else
668	sv = newSVpvn ("", 0);	794	sv = newSVpvn ("", 0);
669		795
		796	dec->cur = dec_cur;
670	return sv;	797	return sv;
671		798
672	fail:	799	fail:
		800	dec->cur = dec_cur;
673	return 0;	801	return 0;
674	}	802	}
675		803
676	static SV *	804	static SV *
677	decode_num (dec_t *dec)	805	decode_num (dec_t *dec)
…		…
735	is_nv = 1;	863	is_nv = 1;
736	}	864	}
737		865
738	if (!is_nv)	866	if (!is_nv)
739	{	867	{
740	UV uv;	868	// special case the rather common 1..4-digit-int case, assumes 32 bit ints or so
741	int numtype = grok_number (start, dec->cur - start, &uv);	869	if (*start == '-')
742	if (numtype & IS_NUMBER_IN_UV)	870	switch (dec->cur - start)
743	if (numtype & IS_NUMBER_NEG)
744	{	871	{
745	if (uv < (UV)IV_MIN)	872	case 2: return newSViv (-( start [1] - '0' ));
746	return newSViv (-(IV)uv);	873	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));
		874	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
		875	case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
747	}	876	}
		877	else
		878	switch (dec->cur - start)
		879	{
		880	case 1: return newSViv ( start [0] - '0' );
		881	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
		882	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
		883	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
		884	}
		885
		886	{
		887	UV uv;
		888	int numtype = grok_number (start, dec->cur - start, &uv);
		889	if (numtype & IS_NUMBER_IN_UV)
		890	if (numtype & IS_NUMBER_NEG)
		891	{
		892	if (uv < (UV)IV_MIN)
		893	return newSViv (-(IV)uv);
		894	}
748	else	895	else
749	return newSVuv (uv);	896	return newSVuv (uv);
		897	}
750	}	898	}
751		899
752	return newSVnv (Atof (start));	900	return newSVnv (Atof (start));
753		901
754	fail:	902	fail:
…		…
758	static SV *	906	static SV *
759	decode_av (dec_t *dec)	907	decode_av (dec_t *dec)
760	{	908	{
761	AV *av = newAV ();	909	AV *av = newAV ();
762		910
		911	DEC_INC_DEPTH;
763	decode_ws (dec);	912	decode_ws (dec);
		913
764	if (*dec->cur == ']')	914	if (*dec->cur == ']')
765	++dec->cur;	915	++dec->cur;
766	else	916	else
767	for (;;)	917	for (;;)
768	{	918	{
…		…
786	ERR (", or ] expected while parsing array");	936	ERR (", or ] expected while parsing array");
787		937
788	++dec->cur;	938	++dec->cur;
789	}	939	}
790		940
		941	DEC_DEC_DEPTH;
791	return newRV_noinc ((SV *)av);	942	return newRV_noinc ((SV *)av);
792		943
793	fail:	944	fail:
794	SvREFCNT_dec (av);	945	SvREFCNT_dec (av);
		946	DEC_DEC_DEPTH;
795	return 0;	947	return 0;
796	}	948	}
797		949
798	static SV *	950	static SV *
799	decode_hv (dec_t *dec)	951	decode_hv (dec_t *dec)
800	{	952	{
801	HV *hv = newHV ();	953	HV *hv = newHV ();
802		954
		955	DEC_INC_DEPTH;
803	decode_ws (dec);	956	decode_ws (dec);
		957
804	if (*dec->cur == '}')	958	if (*dec->cur == '}')
805	++dec->cur;	959	++dec->cur;
806	else	960	else
807	for (;;)	961	for (;;)
808	{	962	{
…		…
821	{	975	{
822	SvREFCNT_dec (key);	976	SvREFCNT_dec (key);
823	goto fail;	977	goto fail;
824	}	978	}
825		979
826	//TODO: optimise
827	hv_store_ent (hv, key, value, 0);	980	hv_store_ent (hv, key, value, 0);
		981	SvREFCNT_dec (key);
828		982
829	decode_ws (dec);	983	decode_ws (dec);
830		984
831	if (*dec->cur == '}')	985	if (*dec->cur == '}')
832	{	986	{
…		…
838	ERR (", or } expected while parsing object/hash");	992	ERR (", or } expected while parsing object/hash");
839		993
840	++dec->cur;	994	++dec->cur;
841	}	995	}
842		996
		997	DEC_DEC_DEPTH;
843	return newRV_noinc ((SV *)hv);	998	return newRV_noinc ((SV *)hv);
844		999
845	fail:	1000	fail:
846	SvREFCNT_dec (hv);	1001	SvREFCNT_dec (hv);
		1002	DEC_DEC_DEPTH;
847	return 0;	1003	return 0;
848	}	1004	}
849		1005
850	static SV *	1006	static SV *
851	decode_sv (dec_t *dec)	1007	decode_sv (dec_t *dec)
…		…
894	ERR ("'null' expected");	1050	ERR ("'null' expected");
895		1051
896	break;	1052	break;
897		1053
898	default:	1054	default:
899	ERR ("malformed json string, neither array, object, number, string or atom");	1055	ERR ("malformed JSON string, neither array, object, number, string or atom");
900	break;	1056	break;
901	}	1057	}
902		1058
903	fail:	1059	fail:
904	return 0;	1060	return 0;
905	}	1061	}
906		1062
907	static SV *	1063	static SV *
908	decode_json (SV *string, UV flags)	1064	decode_json (SV string, U32 flags, UV offset_return)
909	{	1065	{
		1066	dec_t dec;
		1067	UV offset;
910	SV *sv;	1068	SV *sv;
		1069
		1070	SvGETMAGIC (string);
		1071	SvUPGRADE (string, SVt_PV);
911		1072
912	if (flags & F_UTF8)	1073	if (flags & F_UTF8)
913	sv_utf8_downgrade (string, 0);	1074	sv_utf8_downgrade (string, 0);
914	else	1075	else
915	sv_utf8_upgrade (string);	1076	sv_utf8_upgrade (string);
916		1077
917	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1078	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
918		1079
919	dec_t dec;
920	dec.flags = flags;	1080	dec.flags = flags;
921	dec.cur = SvPVX (string);	1081	dec.cur = SvPVX (string);
922	dec.end = SvEND (string);	1082	dec.end = SvEND (string);
923	dec.err = 0;	1083	dec.err = 0;
		1084	dec.depth = 0;
		1085	dec.maxdepth = DEC_DEPTH (dec.flags);
924		1086
		1087	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
925	sv = decode_sv (&dec);	1088	sv = decode_sv (&dec);
926		1089
		1090	if (!(offset_return \|\| !sv))
		1091	{
		1092	// check for trailing garbage
		1093	decode_ws (&dec);
		1094
		1095	if (*dec.cur)
		1096	{
		1097	dec.err = "garbage after JSON object";
		1098	SvREFCNT_dec (sv);
		1099	sv = 0;
		1100	}
		1101	}
		1102
		1103	if (offset_return \|\| !sv)
		1104	{
		1105	offset = dec.flags & F_UTF8
		1106	? dec.cur - SvPVX (string)
		1107	: utf8_distance (dec.cur, SvPVX (string));
		1108
		1109	if (offset_return)
		1110	*offset_return = offset;
		1111	}
		1112
927	if (!sv)	1113	if (!sv)
928	{	1114	{
929	IV offset = dec.flags & F_UTF8
930	? dec.cur - SvPVX (string)
931	: utf8_distance (dec.cur, SvPVX (string));
932	SV *uni = sv_newmortal ();	1115	SV *uni = sv_newmortal ();
933		1116
934	// horrible hack to silence warning inside pv_uni_display	1117	// horrible hack to silence warning inside pv_uni_display
935	COP cop = *PL_curcop;	1118	COP cop = *PL_curcop;
936	cop.cop_warnings = pWARN_NONE;	1119	cop.cop_warnings = pWARN_NONE;
…		…
938	SAVEVPTR (PL_curcop);	1121	SAVEVPTR (PL_curcop);
939	PL_curcop = &cop;	1122	PL_curcop = &cop;
940	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);	1123	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);
941	LEAVE;	1124	LEAVE;
942		1125
943	croak ("%s, at character offset %d (%s)",	1126	croak ("%s, at character offset %d [\"%s\"]",
944	dec.err,	1127	dec.err,
945	(int)offset,	1128	(int)offset,
946	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1129	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
947	}	1130	}
948		1131
…		…
962	BOOT:	1145	BOOT:
963	{	1146	{
964	int i;	1147	int i;
965		1148
966	memset (decode_hexdigit, 0xff, 256);	1149	memset (decode_hexdigit, 0xff, 256);
		1150
967	for (i = 10; i--; )	1151	for (i = 0; i < 256; ++i)
968	decode_hexdigit ['0' + i] = i;	1152	decode_hexdigit [i] =
969		1153	i >= '0' && i <= '9' ? i - '0'
970	for (i = 7; i--; )	1154	: i >= 'a' && i <= 'f' ? i - 'a' + 10
971	{	1155	: i >= 'A' && i <= 'F' ? i - 'A' + 10
972	decode_hexdigit ['a' + i] = 10 + i;	1156	: -1;
973	decode_hexdigit ['A' + i] = 10 + i;
974	}
975		1157
976	json_stash = gv_stashpv ("JSON::XS", 1);	1158	json_stash = gv_stashpv ("JSON::XS", 1);
977	}	1159	}
978		1160
979	PROTOTYPES: DISABLE	1161	PROTOTYPES: DISABLE
…		…
985	RETVAL	1167	RETVAL
986		1168
987	SV ascii (SV self, int enable = 1)	1169	SV ascii (SV self, int enable = 1)
988	ALIAS:	1170	ALIAS:
989	ascii = F_ASCII	1171	ascii = F_ASCII
		1172	latin1 = F_LATIN1
990	utf8 = F_UTF8	1173	utf8 = F_UTF8
991	indent = F_INDENT	1174	indent = F_INDENT
992	canonical = F_CANONICAL	1175	canonical = F_CANONICAL
993	space_before = F_SPACE_BEFORE	1176	space_before = F_SPACE_BEFORE
994	space_after = F_SPACE_AFTER	1177	space_after = F_SPACE_AFTER
…		…
1006	RETVAL = newSVsv (self);	1189	RETVAL = newSVsv (self);
1007	}	1190	}
1008	OUTPUT:	1191	OUTPUT:
1009	RETVAL	1192	RETVAL
1010		1193
		1194	SV max_depth (SV self, UV max_depth = 0x80000000UL)
		1195	CODE:
		1196	{
		1197	UV *uv = SvJSON (self);
		1198	UV log2 = 0;
		1199
		1200	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;
		1201
		1202	while ((1UL << log2) < max_depth)
		1203	++log2;
		1204
		1205	uv = uv & ~F_MAXDEPTH \| (log2 << S_MAXDEPTH);
		1206
		1207	RETVAL = newSVsv (self);
		1208	}
		1209	OUTPUT:
		1210	RETVAL
		1211
1011	void encode (SV self, SV scalar)	1212	void encode (SV self, SV scalar)
1012	PPCODE:	1213	PPCODE:
1013	XPUSHs (encode_json (scalar, *SvJSON (self)));	1214	XPUSHs (encode_json (scalar, *SvJSON (self)));
1014		1215
1015	void decode (SV self, SV jsonstr)	1216	void decode (SV self, SV jsonstr)
1016	PPCODE:	1217	PPCODE:
1017	XPUSHs (decode_json (jsonstr, *SvJSON (self)));	1218	XPUSHs (decode_json (jsonstr, *SvJSON (self), 0));
		1219
		1220	void decode_prefix (SV self, SV jsonstr)
		1221	PPCODE:
		1222	{
		1223	UV offset;
		1224	EXTEND (SP, 2);
		1225	PUSHs (decode_json (jsonstr, *SvJSON (self), &offset));
		1226	PUSHs (sv_2mortal (newSVuv (offset)));
		1227	}
1018		1228
1019	PROTOTYPES: ENABLE	1229	PROTOTYPES: ENABLE
1020		1230
1021	void to_json (SV *scalar)	1231	void to_json (SV *scalar)
		1232	ALIAS:
		1233	objToJson = 0
1022	PPCODE:	1234	PPCODE:
1023	XPUSHs (encode_json (scalar, F_UTF8));	1235	XPUSHs (encode_json (scalar, F_DEFAULT \| F_UTF8));
1024		1236
1025	void from_json (SV *jsonstr)	1237	void from_json (SV *jsonstr)
		1238	ALIAS:
		1239	jsonToObj = 0
1026	PPCODE:	1240	PPCODE:
1027	XPUSHs (decode_json (jsonstr, F_UTF8));	1241	XPUSHs (decode_json (jsonstr, F_DEFAULT \| F_UTF8, 0));
1028		1242

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Comparing JSON-XS/XS.xs (file contents): Revision 1.12 by root, Sat Mar 24 22:10:08 2007 UTC vs. Revision 1.39 by root, Mon Jun 11 03:42:57 2007 UTC

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Comparing JSON-XS/XS.xs (file contents):
Revision 1.12 by root, Sat Mar 24 22:10:08 2007 UTC vs.
Revision 1.39 by root, Mon Jun 11 03:42:57 2007 UTC