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

Comparing JSON-XS/XS.xs (file contents):
Revision 1.29 by root, Wed May 9 15:34:04 2007 UTC vs.
Revision 1.56 by root, Thu Jul 26 11:33:35 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 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
37		48
38	#define SB do {	49	#define SB do {
39	#define SE } while (0)	50	#define SE } while (0)
40		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
41	static HV *json_stash; // JSON::XS::	63	static HV json_stash, json_boolean_stash; // JSON::XS::
		64	static SV json_true, json_false;
		65
		66	typedef struct {
		67	U32 flags;
		68	SV *cb_object;
		69	HV *cb_sk_object;
		70	} JSON;
42		71
43	/////////////////////////////////////////////////////////////////////////////	72	/////////////////////////////////////////////////////////////////////////////
44	// utility functions	73	// utility functions
45		74
46	static UV *	75	inline void
47	SvJSON (SV *sv)
48	{
49	if (!(SvROK (sv) && SvOBJECT (SvRV (sv)) && SvSTASH (SvRV (sv)) == json_stash))
50	croak ("object is not of type JSON::XS");
51
52	return &SvUVX (SvRV (sv));
53	}
54
55	static void
56	shrink (SV *sv)	76	shrink (SV *sv)
57	{	77	{
58	sv_utf8_downgrade (sv, 1);	78	sv_utf8_downgrade (sv, 1);
59	if (SvLEN (sv) > SvCUR (sv) + 1)	79	if (SvLEN (sv) > SvCUR (sv) + 1)
60	{	80	{
69	// decode an utf-8 character and return it, or (UV)-1 in	89	// decode an utf-8 character and return it, or (UV)-1 in
70	// case of an error.	90	// case of an error.
71	// we special-case "safe" characters from U+80 .. U+7FF,	91	// we special-case "safe" characters from U+80 .. U+7FF,
72	// but use the very good perl function to parse anything else.	92	// but use the very good perl function to parse anything else.
73	// note that we never call this function for a ascii codepoints	93	// note that we never call this function for a ascii codepoints
74	static UV	94	inline UV
75	decode_utf8 (unsigned char s, STRLEN len, STRLEN clen)	95	decode_utf8 (unsigned char s, STRLEN len, STRLEN clen)
76	{	96	{
77	if (s[0] > 0xdf \|\| s[0] < 0xc2)	97	if (expect_false (s[0] > 0xdf \|\| s[0] < 0xc2))
78	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);	98	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);
79	else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf)	99	else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf)
80	{	100	{
81	*clen = 2;	101	*clen = 2;
82	return ((s[0] & 0x1f) << 6) \| (s[1] & 0x3f);	102	return ((s[0] & 0x1f) << 6) \| (s[1] & 0x3f);
…		…
95	typedef struct	115	typedef struct
96	{	116	{
97	char *cur; // SvPVX (sv) + current output position	117	char *cur; // SvPVX (sv) + current output position
98	char *end; // SvEND (sv)	118	char *end; // SvEND (sv)
99	SV *sv; // result scalar	119	SV *sv; // result scalar
100	U32 flags; // F_*	120	JSON json;
101	U32 indent; // indentation level	121	U32 indent; // indentation level
102	U32 maxdepth; // max. indentation/recursion level	122	U32 maxdepth; // max. indentation/recursion level
103	} enc_t;	123	} enc_t;
104		124
105	static void	125	inline void
106	need (enc_t *enc, STRLEN len)	126	need (enc_t *enc, STRLEN len)
107	{	127	{
108	if (enc->cur + len >= enc->end)	128	if (expect_false (enc->cur + len >= enc->end))
109	{	129	{
110	STRLEN cur = enc->cur - SvPVX (enc->sv);	130	STRLEN cur = enc->cur - SvPVX (enc->sv);
111	SvGROW (enc->sv, cur + len + 1);	131	SvGROW (enc->sv, cur + len + 1);
112	enc->cur = SvPVX (enc->sv) + cur;	132	enc->cur = SvPVX (enc->sv) + cur;
113	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	133	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
114	}	134	}
115	}	135	}
116		136
117	static void	137	inline void
118	encode_ch (enc_t *enc, char ch)	138	encode_ch (enc_t *enc, char ch)
119	{	139	{
120	need (enc, 1);	140	need (enc, 1);
121	*enc->cur++ = ch;	141	*enc->cur++ = ch;
122	}	142	}
…		…
130		150
131	while (str < end)	151	while (str < end)
132	{	152	{
133	unsigned char ch = (unsigned char )str;	153	unsigned char ch = (unsigned char )str;
134		154
135	if (ch >= 0x20 && ch < 0x80) // most common case	155	if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case
136	{	156	{
137	if (ch == '"') // but with slow exceptions	157	if (expect_false (ch == '"')) // but with slow exceptions
138	{	158	{
139	need (enc, len += 1);	159	need (enc, len += 1);
140	*enc->cur++ = '\\';	160	*enc->cur++ = '\\';
141	*enc->cur++ = '"';	161	*enc->cur++ = '"';
142	}	162	}
143	else if (ch == '\\')	163	else if (expect_false (ch == '\\'))
144	{	164	{
145	need (enc, len += 1);	165	need (enc, len += 1);
146	*enc->cur++ = '\\';	166	*enc->cur++ = '\\';
147	*enc->cur++ = '\\';	167	*enc->cur++ = '\\';
148	}	168	}
…		…
166	STRLEN clen;	186	STRLEN clen;
167	UV uch;	187	UV uch;
168		188
169	if (is_utf8)	189	if (is_utf8)
170	{	190	{
171	//uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY);
172	uch = decode_utf8 (str, end - str, &clen);	191	uch = decode_utf8 (str, end - str, &clen);
173	if (clen == (STRLEN)-1)	192	if (clen == (STRLEN)-1)
174	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);	193	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);
175	}	194	}
176	else	195	else
…		…
180	}	199	}
181		200
182	if (uch > 0x10FFFFUL)	201	if (uch > 0x10FFFFUL)
183	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);	202	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
184		203
185	if (uch < 0x80 \|\| enc->flags & F_ASCII)	204	if (uch < 0x80 \|\| enc->json.flags & F_ASCII \|\| (enc->json.flags & F_LATIN1 && uch > 0xFF))
186	{	205	{
187	if (uch > 0xFFFFUL)	206	if (uch > 0xFFFFUL)
188	{	207	{
189	need (enc, len += 11);	208	need (enc, len += 11);
190	sprintf (enc->cur, "\\u%04x\\u%04x",	209	sprintf (enc->cur, "\\u%04x\\u%04x",
…		…
204	*enc->cur++ = hexdigit [(uch >> 0) & 15];	223	*enc->cur++ = hexdigit [(uch >> 0) & 15];
205	}	224	}
206		225
207	str += clen;	226	str += clen;
208	}	227	}
		228	else if (enc->json.flags & F_LATIN1)
		229	{
		230	*enc->cur++ = uch;
		231	str += clen;
		232	}
209	else if (is_utf8)	233	else if (is_utf8)
210	{	234	{
211	need (enc, len += clen);	235	need (enc, len += clen);
212	do	236	do
213	{	237	{
…		…
227		251
228	--len;	252	--len;
229	}	253	}
230	}	254	}
231		255
232	static void	256	inline void
233	encode_indent (enc_t *enc)	257	encode_indent (enc_t *enc)
234	{	258	{
235	if (enc->flags & F_INDENT)	259	if (enc->json.flags & F_INDENT)
236	{	260	{
237	int spaces = enc->indent * INDENT_STEP;	261	int spaces = enc->indent * INDENT_STEP;
238		262
239	need (enc, spaces);	263	need (enc, spaces);
240	memset (enc->cur, ' ', spaces);	264	memset (enc->cur, ' ', spaces);
241	enc->cur += spaces;	265	enc->cur += spaces;
242	}	266	}
243	}	267	}
244		268
245	static void	269	inline void
246	encode_space (enc_t *enc)	270	encode_space (enc_t *enc)
247	{	271	{
248	need (enc, 1);	272	need (enc, 1);
249	encode_ch (enc, ' ');	273	encode_ch (enc, ' ');
250	}	274	}
251		275
252	static void	276	inline void
253	encode_nl (enc_t *enc)	277	encode_nl (enc_t *enc)
254	{	278	{
255	if (enc->flags & F_INDENT)	279	if (enc->json.flags & F_INDENT)
256	{	280	{
257	need (enc, 1);	281	need (enc, 1);
258	encode_ch (enc, '\n');	282	encode_ch (enc, '\n');
259	}	283	}
260	}	284	}
261		285
262	static void	286	inline void
263	encode_comma (enc_t *enc)	287	encode_comma (enc_t *enc)
264	{	288	{
265	encode_ch (enc, ',');	289	encode_ch (enc, ',');
266		290
267	if (enc->flags & F_INDENT)	291	if (enc->json.flags & F_INDENT)
268	encode_nl (enc);	292	encode_nl (enc);
269	else if (enc->flags & F_SPACE_AFTER)	293	else if (enc->json.flags & F_SPACE_AFTER)
270	encode_space (enc);	294	encode_space (enc);
271	}	295	}
272		296
273	static void encode_sv (enc_t enc, SV sv);	297	static void encode_sv (enc_t enc, SV sv);
274		298
…		…
283	encode_ch (enc, '['); encode_nl (enc);	307	encode_ch (enc, '['); encode_nl (enc);
284	++enc->indent;	308	++enc->indent;
285		309
286	for (i = 0; i <= len; ++i)	310	for (i = 0; i <= len; ++i)
287	{	311	{
		312	SV **svp = av_fetch (av, i, 0);
		313
288	encode_indent (enc);	314	encode_indent (enc);
289	encode_sv (enc, *av_fetch (av, i, 0));	315
		316	if (svp)
		317	encode_sv (enc, *svp);
		318	else
		319	encode_str (enc, "null", 4, 0);
290		320
291	if (i < len)	321	if (i < len)
292	encode_comma (enc);	322	encode_comma (enc);
293	}	323	}
294		324
…		…
317	else	347	else
318	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));	348	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));
319		349
320	encode_ch (enc, '"');	350	encode_ch (enc, '"');
321		351
322	if (enc->flags & F_SPACE_BEFORE) encode_space (enc);	352	if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);
323	encode_ch (enc, ':');	353	encode_ch (enc, ':');
324	if (enc->flags & F_SPACE_AFTER ) encode_space (enc);	354	if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);
325	encode_sv (enc, HeVAL (he));	355	encode_sv (enc, HeVAL (he));
326	}	356	}
327		357
328	// compare hash entries, used when all keys are bytestrings	358	// compare hash entries, used when all keys are bytestrings
329	static int	359	static int
…		…
364	{	394	{
365	// for canonical output we have to sort by keys first	395	// for canonical output we have to sort by keys first
366	// actually, this is mostly due to the stupid so-called	396	// actually, this is mostly due to the stupid so-called
367	// security workaround added somewhere in 5.8.x.	397	// security workaround added somewhere in 5.8.x.
368	// that randomises hash orderings	398	// that randomises hash orderings
369	if (enc->flags & F_CANONICAL)	399	if (enc->json.flags & F_CANONICAL)
370	{	400	{
371	HE he, hes [count]; // if your compiler dies here, you need to enable C99 mode
372	int fast = 1;	401	int fast = 1;
		402	HE *he;
		403	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)
		404	HE *hes = _alloca (count sizeof (HE));
		405	#else
		406	HE *hes [count]; // if your compiler dies here, you need to enable C99 mode
		407	#endif
373		408
374	i = 0;	409	i = 0;
375	while ((he = hv_iternext (hv)))	410	while ((he = hv_iternext (hv)))
376	{	411	{
377	hes [i++] = he;	412	hes [i++] = he;
…		…
441	svtype svt;	476	svtype svt;
442		477
443	SvGETMAGIC (sv);	478	SvGETMAGIC (sv);
444	svt = SvTYPE (sv);	479	svt = SvTYPE (sv);
445		480
		481	if (expect_false (SvOBJECT (sv)))
		482	{
		483	if (SvSTASH (sv) == json_boolean_stash)
		484	{
		485	if (SvIV (sv))
		486	encode_str (enc, "true", 4, 0);
		487	else
		488	encode_str (enc, "false", 5, 0);
		489	}
		490	else
		491	{
		492	#if 0
		493	if (0 && sv_derived_from (rv, "JSON::Literal"))
		494	{
		495	// not yet
		496	}
		497	#endif
		498	if (enc->json.flags & F_CONV_BLESSED)
		499	{
		500	// we re-bless the reference to get overload and other niceties right
		501	GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 0);
		502
		503	if (to_json)
		504	{
		505	int count;
		506	dSP;
		507
		508	ENTER; SAVETMPS; PUSHMARK (SP);
		509	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
		510
		511	// calling with G_SCALAR ensures that we always get a 1 return value
		512	PUTBACK;
		513	call_sv ((SV *)GvCV (to_json), G_SCALAR);
		514	SPAGAIN;
		515
		516	// catch this surprisingly common error
		517	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		518	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		519
		520	sv = POPs;
		521	PUTBACK;
		522
		523	encode_sv (enc, sv);
		524
		525	FREETMPS; LEAVE;
		526	}
		527	else if (enc->json.flags & F_ALLOW_BLESSED)
		528	encode_str (enc, "null", 4, 0);
		529	else
		530	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
		531	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		532	}
		533	else if (enc->json.flags & F_ALLOW_BLESSED)
		534	encode_str (enc, "null", 4, 0);
		535	else
		536	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",
		537	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		538	}
		539	}
446	if (svt == SVt_PVHV)	540	else if (svt == SVt_PVHV)
447	encode_hv (enc, (HV *)sv);	541	encode_hv (enc, (HV *)sv);
448	else if (svt == SVt_PVAV)	542	else if (svt == SVt_PVAV)
449	encode_av (enc, (AV *)sv);	543	encode_av (enc, (AV *)sv);
450	else if (svt < SVt_PVAV)	544	else if (svt < SVt_PVAV)
451	{	545	{
452	if (SvNIOK (sv) && SvIV (sv) == 0)	546	STRLEN len = 0;
		547	char *pv = svt ? SvPV (sv, len) : 0;
		548
		549	if (len == 1 && *pv == '1')
		550	encode_str (enc, "true", 4, 0);
		551	else if (len == 1 && *pv == '0')
453	encode_str (enc, "false", 5, 0);	552	encode_str (enc, "false", 5, 0);
454	else if (SvNIOK (sv) && SvIV (sv) == 1)
455	encode_str (enc, "true", 4, 0);
456	else	553	else
457	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",	554	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
458	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	555	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
459	}	556	}
460	else	557	else
…		…
475	encode_str (enc, str, len, SvUTF8 (sv));	572	encode_str (enc, str, len, SvUTF8 (sv));
476	encode_ch (enc, '"');	573	encode_ch (enc, '"');
477	}	574	}
478	else if (SvNOKp (sv))	575	else if (SvNOKp (sv))
479	{	576	{
		577	// trust that perl will do the right thing w.r.t. JSON syntax.
480	need (enc, NV_DIG + 32);	578	need (enc, NV_DIG + 32);
481	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);	579	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
482	enc->cur += strlen (enc->cur);	580	enc->cur += strlen (enc->cur);
483	}	581	}
484	else if (SvIOKp (sv))	582	else if (SvIOKp (sv))
485	{	583	{
486	need (enc, 64);	584	// we assume we can always read an IV as a UV
		585	if (SvUV (sv) & ~(UV)0x7fff)
		586	{
		587	// large integer, use the (rather slow) snprintf way.
		588	need (enc, sizeof (UV) * 3);
487	enc->cur +=	589	enc->cur +=
488	SvIsUV(sv)	590	SvIsUV(sv)
489	? snprintf (enc->cur, 64, "%"UVuf, (UV)SvUVX (sv))	591	? snprintf (enc->cur, sizeof (UV) * 3, "%"UVuf, (UV)SvUVX (sv))
490	: snprintf (enc->cur, 64, "%"IVdf, (IV)SvIVX (sv));	592	: snprintf (enc->cur, sizeof (UV) * 3, "%"IVdf, (IV)SvIVX (sv));
		593	}
		594	else
		595	{
		596	// optimise the "small number case"
		597	// code will likely be branchless and use only a single multiplication
		598	I32 i = SvIV (sv);
		599	U32 u;
		600	char digit, nz = 0;
		601
		602	need (enc, 6);
		603
		604	*enc->cur = '-'; enc->cur += i < 0 ? 1 : 0;
		605	u = i < 0 ? -i : i;
		606
		607	// convert to 4.28 fixed-point representation
		608	u = u * ((0xfffffff + 10000) / 10000); // 10**5, 5 fractional digits
		609
		610	// now output digit by digit, each time masking out the integer part
		611	// and multiplying by 5 while moving the decimal point one to the right,
		612	// resulting in a net multiplication by 10.
		613	// we always write the digit to memory but conditionally increment
		614	// the pointer, to ease the usage of conditional move instructions.
		615	digit = u >> 28; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0xfffffff) 5;
		616	digit = u >> 27; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x7ffffff) 5;
		617	digit = u >> 26; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x3ffffff) 5;
		618	digit = u >> 25; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x1ffffff) 5;
		619	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
		620	}
491	}	621	}
492	else if (SvROK (sv))	622	else if (SvROK (sv))
493	encode_rv (enc, SvRV (sv));	623	encode_rv (enc, SvRV (sv));
494	else if (!SvOK (sv))	624	else if (!SvOK (sv))
495	encode_str (enc, "null", 4, 0);	625	encode_str (enc, "null", 4, 0);
…		…
497	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",	627	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",
498	SvPV_nolen (sv), SvFLAGS (sv));	628	SvPV_nolen (sv), SvFLAGS (sv));
499	}	629	}
500		630
501	static SV *	631	static SV *
502	encode_json (SV *scalar, U32 flags)	632	encode_json (SV scalar, JSON json)
503	{	633	{
504	enc_t enc;	634	enc_t enc;
505		635
506	if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar))	636	if (!(json->flags & F_ALLOW_NONREF) && !SvROK (scalar))
507	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");	637	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
508		638
509	enc.flags = flags;	639	enc.json = *json;
510	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	640	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
511	enc.cur = SvPVX (enc.sv);	641	enc.cur = SvPVX (enc.sv);
512	enc.end = SvEND (enc.sv);	642	enc.end = SvEND (enc.sv);
513	enc.indent = 0;	643	enc.indent = 0;
514	enc.maxdepth = DEC_DEPTH (flags);	644	enc.maxdepth = DEC_DEPTH (enc.json.flags);
515		645
516	SvPOK_only (enc.sv);	646	SvPOK_only (enc.sv);
517	encode_sv (&enc, scalar);	647	encode_sv (&enc, scalar);
518		648
519	if (!(flags & (F_ASCII \| F_UTF8)))
520	SvUTF8_on (enc.sv);
521
522	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	649	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
523	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	650	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
524		651
		652	if (!(enc.json.flags & (F_ASCII \| F_LATIN1 \| F_UTF8)))
		653	SvUTF8_on (enc.sv);
		654
525	if (enc.flags & F_SHRINK)	655	if (enc.json.flags & F_SHRINK)
526	shrink (enc.sv);	656	shrink (enc.sv);
527		657
528	return enc.sv;	658	return enc.sv;
529	}	659	}
530		660
…		…
535	typedef struct	665	typedef struct
536	{	666	{
537	char *cur; // current parser pointer	667	char *cur; // current parser pointer
538	char *end; // end of input string	668	char *end; // end of input string
539	const char *err; // parse error, if != 0	669	const char *err; // parse error, if != 0
540	U32 flags; // F_*	670	JSON json;
541	U32 depth; // recursion depth	671	U32 depth; // recursion depth
542	U32 maxdepth; // recursion depth limit	672	U32 maxdepth; // recursion depth limit
543	} dec_t;	673	} dec_t;
544		674
545	static void	675	inline void
546	decode_ws (dec_t *dec)	676	decode_ws (dec_t *dec)
547	{	677	{
548	for (;;)	678	for (;;)
549	{	679	{
550	char ch = *dec->cur;	680	char ch = *dec->cur;
…		…
576	decode_4hex (dec_t *dec)	706	decode_4hex (dec_t *dec)
577	{	707	{
578	signed char d1, d2, d3, d4;	708	signed char d1, d2, d3, d4;
579	unsigned char cur = (unsigned char )dec->cur;	709	unsigned char cur = (unsigned char )dec->cur;
580		710
581	d1 = decode_hexdigit [cur [0]]; if (d1 < 0) ERR ("four hexadecimal digits expected");	711	d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("exactly four hexadecimal digits expected");
582	d2 = decode_hexdigit [cur [1]]; if (d2 < 0) ERR ("four hexadecimal digits expected");	712	d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("exactly four hexadecimal digits expected");
583	d3 = decode_hexdigit [cur [2]]; if (d3 < 0) ERR ("four hexadecimal digits expected");	713	d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("exactly four hexadecimal digits expected");
584	d4 = decode_hexdigit [cur [3]]; if (d4 < 0) ERR ("four hexadecimal digits expected");	714	d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("exactly four hexadecimal digits expected");
585		715
586	dec->cur += 4;	716	dec->cur += 4;
587		717
588	return ((UV)d1) << 12	718	return ((UV)d1) << 12
589	\| ((UV)d2) << 8	719	\| ((UV)d2) << 8
…		…
597	static SV *	727	static SV *
598	decode_str (dec_t *dec)	728	decode_str (dec_t *dec)
599	{	729	{
600	SV *sv = 0;	730	SV *sv = 0;
601	int utf8 = 0;	731	int utf8 = 0;
		732	char *dec_cur = dec->cur;
602		733
603	do	734	do
604	{	735	{
605	char buf [SHORT_STRING_LEN + UTF8_MAXBYTES];	736	char buf [SHORT_STRING_LEN + UTF8_MAXBYTES];
606	char *cur = buf;	737	char *cur = buf;
607		738
608	do	739	do
609	{	740	{
610	unsigned char ch = (unsigned char )dec->cur++;	741	unsigned char ch = (unsigned char )dec_cur++;
611		742
612	if (ch == '"')	743	if (expect_false (ch == '"'))
613	{	744	{
614	--dec->cur;	745	--dec_cur;
615	break;	746	break;
616	}	747	}
617	else if (ch == '\\')	748	else if (expect_false (ch == '\\'))
618	{	749	{
619	switch (*dec->cur)	750	switch (*dec_cur)
620	{	751	{
621	case '\\':	752	case '\\':
622	case '/':	753	case '/':
623	case '"': cur++ = dec->cur++; break;	754	case '"': cur++ = dec_cur++; break;
624		755
625	case 'b': ++dec->cur; *cur++ = '\010'; break;	756	case 'b': ++dec_cur; *cur++ = '\010'; break;
626	case 't': ++dec->cur; *cur++ = '\011'; break;	757	case 't': ++dec_cur; *cur++ = '\011'; break;
627	case 'n': ++dec->cur; *cur++ = '\012'; break;	758	case 'n': ++dec_cur; *cur++ = '\012'; break;
628	case 'f': ++dec->cur; *cur++ = '\014'; break;	759	case 'f': ++dec_cur; *cur++ = '\014'; break;
629	case 'r': ++dec->cur; *cur++ = '\015'; break;	760	case 'r': ++dec_cur; *cur++ = '\015'; break;
630		761
631	case 'u':	762	case 'u':
632	{	763	{
633	UV lo, hi;	764	UV lo, hi;
634	++dec->cur;	765	++dec_cur;
635		766
		767	dec->cur = dec_cur;
636	hi = decode_4hex (dec);	768	hi = decode_4hex (dec);
		769	dec_cur = dec->cur;
637	if (hi == (UV)-1)	770	if (hi == (UV)-1)
638	goto fail;	771	goto fail;
639		772
640	// possibly a surrogate pair	773	// possibly a surrogate pair
641	if (hi >= 0xd800)	774	if (hi >= 0xd800)
642	if (hi < 0xdc00)	775	if (hi < 0xdc00)
643	{	776	{
644	if (dec->cur [0] != '\\' \|\| dec->cur [1] != 'u')	777	if (dec_cur [0] != '\\' \|\| dec_cur [1] != 'u')
645	ERR ("missing low surrogate character in surrogate pair");	778	ERR ("missing low surrogate character in surrogate pair");
646		779
647	dec->cur += 2;	780	dec_cur += 2;
648		781
		782	dec->cur = dec_cur;
649	lo = decode_4hex (dec);	783	lo = decode_4hex (dec);
		784	dec_cur = dec->cur;
650	if (lo == (UV)-1)	785	if (lo == (UV)-1)
651	goto fail;	786	goto fail;
652		787
653	if (lo < 0xdc00 \|\| lo >= 0xe000)	788	if (lo < 0xdc00 \|\| lo >= 0xe000)
654	ERR ("surrogate pair expected");	789	ERR ("surrogate pair expected");
…		…
668	*cur++ = hi;	803	*cur++ = hi;
669	}	804	}
670	break;	805	break;
671		806
672	default:	807	default:
673	--dec->cur;	808	--dec_cur;
674	ERR ("illegal backslash escape sequence in string");	809	ERR ("illegal backslash escape sequence in string");
675	}	810	}
676	}	811	}
677	else if (ch >= 0x20 && ch <= 0x7f)	812	else if (expect_true (ch >= 0x20 && ch <= 0x7f))
678	*cur++ = ch;	813	*cur++ = ch;
679	else if (ch >= 0x80)	814	else if (ch >= 0x80)
680	{	815	{
681	STRLEN clen;	816	STRLEN clen;
682	UV uch;	817	UV uch;
683		818
684	--dec->cur;	819	--dec_cur;
685		820
686	uch = decode_utf8 (dec->cur, dec->end - dec->cur, &clen);	821	uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
687	if (clen == (STRLEN)-1)	822	if (clen == (STRLEN)-1)
688	ERR ("malformed UTF-8 character in JSON string");	823	ERR ("malformed UTF-8 character in JSON string");
689		824
690	do	825	do
691	cur++ = dec->cur++;	826	cur++ = dec_cur++;
692	while (--clen);	827	while (--clen);
693		828
694	utf8 = 1;	829	utf8 = 1;
695	}	830	}
696	else	831	else
697	{	832	{
698	--dec->cur;	833	--dec_cur;
699		834
700	if (!ch)	835	if (!ch)
701	ERR ("unexpected end of string while parsing JSON string");	836	ERR ("unexpected end of string while parsing JSON string");
702	else	837	else
703	ERR ("invalid character encountered while parsing JSON string");	838	ERR ("invalid character encountered while parsing JSON string");
…		…
716	}	851	}
717	else	852	else
718	sv = newSVpvn (buf, len);	853	sv = newSVpvn (buf, len);
719	}	854	}
720	}	855	}
721	while (*dec->cur != '"');	856	while (*dec_cur != '"');
722		857
723	++dec->cur;	858	++dec_cur;
724		859
725	if (sv)	860	if (sv)
726	{	861	{
727	SvPOK_only (sv);	862	SvPOK_only (sv);
728	*SvEND (sv) = 0;	863	*SvEND (sv) = 0;
…		…
731	SvUTF8_on (sv);	866	SvUTF8_on (sv);
732	}	867	}
733	else	868	else
734	sv = newSVpvn ("", 0);	869	sv = newSVpvn ("", 0);
735		870
		871	dec->cur = dec_cur;
736	return sv;	872	return sv;
737		873
738	fail:	874	fail:
		875	dec->cur = dec_cur;
739	return 0;	876	return 0;
740	}	877	}
741		878
742	static SV *	879	static SV *
743	decode_num (dec_t *dec)	880	decode_num (dec_t *dec)
…		…
801	is_nv = 1;	938	is_nv = 1;
802	}	939	}
803		940
804	if (!is_nv)	941	if (!is_nv)
805	{	942	{
806	UV uv;	943	int len = dec->cur - start;
807	int numtype = grok_number (start, dec->cur - start, &uv);	944
808	if (numtype & IS_NUMBER_IN_UV)	945	// special case the rather common 1..4-digit-int case, assumes 32 bit ints or so
809	if (numtype & IS_NUMBER_NEG)	946	if (*start == '-')
		947	switch (len)
810	{	948	{
811	if (uv < (UV)IV_MIN)	949	case 2: return newSViv (-( start [1] - '0' * 1));
812	return newSViv (-(IV)uv);	950	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));
		951	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
		952	case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
813	}	953	}
		954	else
		955	switch (len)
		956	{
		957	case 1: return newSViv ( start [0] - '0' * 1);
		958	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
		959	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
		960	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
		961	}
		962
		963	{
		964	UV uv;
		965	int numtype = grok_number (start, len, &uv);
		966	if (numtype & IS_NUMBER_IN_UV)
		967	if (numtype & IS_NUMBER_NEG)
		968	{
		969	if (uv < (UV)IV_MIN)
		970	return newSViv (-(IV)uv);
		971	}
814	else	972	else
815	return newSVuv (uv);	973	return newSVuv (uv);
816	}	974	}
817		975
		976	len -= *start == '-' ? 1 : 0;
		977
		978	// does not fit into IV or UV, try NV
		979	if ((sizeof (NV) == sizeof (double) && DBL_DIG >= len)
		980	#if defined (LDBL_DIG)
		981	\|\| (sizeof (NV) == sizeof (long double) && LDBL_DIG >= len)
		982	#endif
		983	)
		984	// fits into NV without loss of precision
		985	return newSVnv (Atof (start));
		986
		987	// everything else fails, convert it to a string
		988	return newSVpvn (start, dec->cur - start);
		989	}
		990
		991	// loss of precision here
818	return newSVnv (Atof (start));	992	return newSVnv (Atof (start));
819		993
820	fail:	994	fail:
821	return 0;	995	return 0;
822	}	996	}
…		…
866	}	1040	}
867		1041
868	static SV *	1042	static SV *
869	decode_hv (dec_t *dec)	1043	decode_hv (dec_t *dec)
870	{	1044	{
		1045	SV *sv;
871	HV *hv = newHV ();	1046	HV *hv = newHV ();
872		1047
873	DEC_INC_DEPTH;	1048	DEC_INC_DEPTH;
874	decode_ws (dec);	1049	decode_ws (dec);
875		1050
876	if (*dec->cur == '}')	1051	if (*dec->cur == '}')
877	++dec->cur;	1052	++dec->cur;
878	else	1053	else
879	for (;;)	1054	for (;;)
880	{	1055	{
881	SV key, value;
882
883	decode_ws (dec); EXPECT_CH ('"');	1056	decode_ws (dec); EXPECT_CH ('"');
884		1057
885	key = decode_str (dec);	1058	// heuristic: assume that
886	if (!key)	1059	// a) decode_str + hv_store_ent are abysmally slow.
887	goto fail;	1060	// b) most hash keys are short, simple ascii text.
		1061	// => try to "fast-match" such strings to avoid
		1062	// the overhead of decode_str + hv_store_ent.
		1063	{
		1064	SV *value;
		1065	char *p = dec->cur;
		1066	char *e = p + 24; // only try up to 24 bytes
888		1067
889	decode_ws (dec); EXPECT_CH (':');	1068	for (;;)
890
891	value = decode_sv (dec);
892	if (!value)
893	{	1069	{
		1070	// the >= 0x80 is true on most architectures
		1071	if (p == e \|\| p < 0x20 \|\| p >= 0x80 \|\| *p == '\\')
		1072	{
		1073	// slow path, back up and use decode_str
		1074	SV *key = decode_str (dec);
		1075	if (!key)
		1076	goto fail;
		1077
		1078	decode_ws (dec); EXPECT_CH (':');
		1079
		1080	value = decode_sv (dec);
		1081	if (!value)
		1082	{
		1083	SvREFCNT_dec (key);
		1084	goto fail;
		1085	}
		1086
		1087	hv_store_ent (hv, key, value, 0);
894	SvREFCNT_dec (key);	1088	SvREFCNT_dec (key);
		1089
		1090	break;
		1091	}
		1092	else if (*p == '"')
		1093	{
		1094	// fast path, got a simple key
		1095	char *key = dec->cur;
		1096	int len = p - key;
		1097	dec->cur = p + 1;
		1098
		1099	decode_ws (dec); EXPECT_CH (':');
		1100
		1101	value = decode_sv (dec);
		1102	if (!value)
895	goto fail;	1103	goto fail;
		1104
		1105	hv_store (hv, key, len, value, 0);
		1106
		1107	break;
		1108	}
		1109
		1110	++p;
896	}	1111	}
897		1112	}
898	hv_store_ent (hv, key, value, 0);
899	SvREFCNT_dec (key);
900		1113
901	decode_ws (dec);	1114	decode_ws (dec);
902		1115
903	if (*dec->cur == '}')	1116	if (*dec->cur == '}')
904	{	1117	{
…		…
911		1124
912	++dec->cur;	1125	++dec->cur;
913	}	1126	}
914		1127
915	DEC_DEC_DEPTH;	1128	DEC_DEC_DEPTH;
916	return newRV_noinc ((SV *)hv);	1129	sv = newRV_noinc ((SV *)hv);
		1130
		1131	// check filter callbacks
		1132	if (dec->json.flags & F_HOOK)
		1133	{
		1134	if (dec->json.cb_sk_object && HvKEYS (hv) == 1)
		1135	{
		1136	HE cb, he;
		1137
		1138	hv_iterinit (hv);
		1139	he = hv_iternext (hv);
		1140	hv_iterinit (hv);
		1141
		1142	// the next line creates a mortal sv each time its called.
		1143	// might want to optimise this for common cases.
		1144	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);
		1145
		1146	if (cb)
		1147	{
		1148	dSP;
		1149	int count;
		1150
		1151	ENTER; SAVETMPS; PUSHMARK (SP);
		1152	XPUSHs (HeVAL (he));
		1153
		1154	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
		1155
		1156	if (count == 1)
		1157	{
		1158	sv = newSVsv (POPs);
		1159	FREETMPS; LEAVE;
		1160	return sv;
		1161	}
		1162
		1163	FREETMPS; LEAVE;
		1164	}
		1165	}
		1166
		1167	if (dec->json.cb_object)
		1168	{
		1169	dSP;
		1170	int count;
		1171
		1172	ENTER; SAVETMPS; PUSHMARK (SP);
		1173	XPUSHs (sv_2mortal (sv));
		1174
		1175	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;
		1176
		1177	if (count == 1)
		1178	{
		1179	sv = newSVsv (POPs);
		1180	FREETMPS; LEAVE;
		1181	return sv;
		1182	}
		1183
		1184	SvREFCNT_inc (sv);
		1185	FREETMPS; LEAVE;
		1186	}
		1187	}
		1188
		1189	return sv;
917		1190
918	fail:	1191	fail:
919	SvREFCNT_dec (hv);	1192	SvREFCNT_dec (hv);
920	DEC_DEC_DEPTH;	1193	DEC_DEC_DEPTH;
921	return 0;	1194	return 0;
…		…
923		1196
924	static SV *	1197	static SV *
925	decode_sv (dec_t *dec)	1198	decode_sv (dec_t *dec)
926	{	1199	{
927	decode_ws (dec);	1200	decode_ws (dec);
		1201
		1202	// the beauty of JSON: you need exactly one character lookahead
		1203	// to parse anything.
928	switch (*dec->cur)	1204	switch (*dec->cur)
929	{	1205	{
930	case '"': ++dec->cur; return decode_str (dec);	1206	case '"': ++dec->cur; return decode_str (dec);
931	case '[': ++dec->cur; return decode_av (dec);	1207	case '[': ++dec->cur; return decode_av (dec);
932	case '{': ++dec->cur; return decode_hv (dec);	1208	case '{': ++dec->cur; return decode_hv (dec);
…		…
938		1214
939	case 't':	1215	case 't':
940	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1216	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
941	{	1217	{
942	dec->cur += 4;	1218	dec->cur += 4;
943	return newSViv (1);	1219	return SvREFCNT_inc (json_true);
944	}	1220	}
945	else	1221	else
946	ERR ("'true' expected");	1222	ERR ("'true' expected");
947		1223
948	break;	1224	break;
949		1225
950	case 'f':	1226	case 'f':
951	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))	1227	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
952	{	1228	{
953	dec->cur += 5;	1229	dec->cur += 5;
954	return newSViv (0);	1230	return SvREFCNT_inc (json_false);
955	}	1231	}
956	else	1232	else
957	ERR ("'false' expected");	1233	ERR ("'false' expected");
958		1234
959	break;	1235	break;
…		…
977	fail:	1253	fail:
978	return 0;	1254	return 0;
979	}	1255	}
980		1256
981	static SV *	1257	static SV *
982	decode_json (SV *string, U32 flags)	1258	decode_json (SV string, JSON json, UV *offset_return)
983	{	1259	{
984	dec_t dec;	1260	dec_t dec;
		1261	UV offset;
985	SV *sv;	1262	SV *sv;
986		1263
987	SvGETMAGIC (string);	1264	SvGETMAGIC (string);
988	SvUPGRADE (string, SVt_PV);	1265	SvUPGRADE (string, SVt_PV);
989		1266
		1267	if (json->flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (json->flags))
		1268	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		1269	(unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (json->flags));
		1270
990	if (flags & F_UTF8)	1271	if (json->flags & F_UTF8)
991	sv_utf8_downgrade (string, 0);	1272	sv_utf8_downgrade (string, 0);
992	else	1273	else
993	sv_utf8_upgrade (string);	1274	sv_utf8_upgrade (string);
994		1275
995	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1276	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
996		1277
997	dec.flags = flags;	1278	dec.json = *json;
998	dec.cur = SvPVX (string);	1279	dec.cur = SvPVX (string);
999	dec.end = SvEND (string);	1280	dec.end = SvEND (string);
1000	dec.err = 0;	1281	dec.err = 0;
1001	dec.depth = 0;	1282	dec.depth = 0;
1002	dec.maxdepth = DEC_DEPTH (dec.flags);	1283	dec.maxdepth = DEC_DEPTH (dec.json.flags);
1003		1284
		1285	if (dec.json.cb_object \|\| dec.json.cb_sk_object)
		1286	dec.json.flags \|= F_HOOK;
		1287
1004	*dec.end = 0; // this should basically be a nop, too, but make sure its there	1288	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
1005	sv = decode_sv (&dec);	1289	sv = decode_sv (&dec);
1006		1290
		1291	if (!(offset_return \|\| !sv))
		1292	{
		1293	// check for trailing garbage
		1294	decode_ws (&dec);
		1295
		1296	if (*dec.cur)
		1297	{
		1298	dec.err = "garbage after JSON object";
		1299	SvREFCNT_dec (sv);
		1300	sv = 0;
		1301	}
		1302	}
		1303
		1304	if (offset_return \|\| !sv)
		1305	{
		1306	offset = dec.json.flags & F_UTF8
		1307	? dec.cur - SvPVX (string)
		1308	: utf8_distance (dec.cur, SvPVX (string));
		1309
		1310	if (offset_return)
		1311	*offset_return = offset;
		1312	}
		1313
1007	if (!sv)	1314	if (!sv)
1008	{	1315	{
1009	IV offset = dec.flags & F_UTF8
1010	? dec.cur - SvPVX (string)
1011	: utf8_distance (dec.cur, SvPVX (string));
1012	SV *uni = sv_newmortal ();	1316	SV *uni = sv_newmortal ();
1013		1317
1014	// horrible hack to silence warning inside pv_uni_display	1318	// horrible hack to silence warning inside pv_uni_display
1015	COP cop = *PL_curcop;	1319	COP cop = *PL_curcop;
1016	cop.cop_warnings = pWARN_NONE;	1320	cop.cop_warnings = pWARN_NONE;
…		…
1026	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1330	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
1027	}	1331	}
1028		1332
1029	sv = sv_2mortal (sv);	1333	sv = sv_2mortal (sv);
1030		1334
1031	if (!(dec.flags & F_ALLOW_NONREF) && !SvROK (sv))	1335	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)");	1336	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
1033		1337
1034	return sv;	1338	return sv;
1035	}	1339	}
1036		1340
…		…
1040	MODULE = JSON::XS PACKAGE = JSON::XS	1344	MODULE = JSON::XS PACKAGE = JSON::XS
1041		1345
1042	BOOT:	1346	BOOT:
1043	{	1347	{
1044	int i;	1348	int i;
1045
1046	memset (decode_hexdigit, 0xff, 256);
1047		1349
1048	for (i = 0; i < 256; ++i)	1350	for (i = 0; i < 256; ++i)
1049	decode_hexdigit [i] =	1351	decode_hexdigit [i] =
1050	i >= '0' && i <= '9' ? i - '0'	1352	i >= '0' && i <= '9' ? i - '0'
1051	: i >= 'a' && i <= 'f' ? i - 'a' + 10	1353	: i >= 'a' && i <= 'f' ? i - 'a' + 10
1052	: i >= 'A' && i <= 'F' ? i - 'A' + 10	1354	: i >= 'A' && i <= 'F' ? i - 'A' + 10
1053	: -1;	1355	: -1;
1054		1356
1055	json_stash = gv_stashpv ("JSON::XS", 1);	1357	json_stash = gv_stashpv ("JSON::XS" , 1);
		1358	json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);
		1359
		1360	json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true );
		1361	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);
1056	}	1362	}
1057		1363
1058	PROTOTYPES: DISABLE	1364	PROTOTYPES: DISABLE
1059		1365
1060	SV new (char dummy)	1366	void new (char *klass)
1061	CODE:	1367	PPCODE:
1062	RETVAL = sv_bless (newRV_noinc (newSVuv (F_DEFAULT)), json_stash);	1368	{
1063	OUTPUT:	1369	SV *pv = NEWSV (0, sizeof (JSON));
1064	RETVAL	1370	SvPOK_only (pv);
		1371	Zero (SvPVX (pv), 1, JSON);
		1372	((JSON *)SvPVX (pv))->flags = F_DEFAULT;
		1373	XPUSHs (sv_2mortal (sv_bless (newRV_noinc (pv), json_stash)));
		1374	}
1065		1375
1066	SV ascii (SV self, int enable = 1)	1376	void ascii (JSON *self, int enable = 1)
1067	ALIAS:	1377	ALIAS:
1068	ascii = F_ASCII	1378	ascii = F_ASCII
		1379	latin1 = F_LATIN1
1069	utf8 = F_UTF8	1380	utf8 = F_UTF8
1070	indent = F_INDENT	1381	indent = F_INDENT
1071	canonical = F_CANONICAL	1382	canonical = F_CANONICAL
1072	space_before = F_SPACE_BEFORE	1383	space_before = F_SPACE_BEFORE
1073	space_after = F_SPACE_AFTER	1384	space_after = F_SPACE_AFTER
1074	pretty = F_PRETTY	1385	pretty = F_PRETTY
1075	allow_nonref = F_ALLOW_NONREF	1386	allow_nonref = F_ALLOW_NONREF
1076	shrink = F_SHRINK	1387	shrink = F_SHRINK
		1388	allow_blessed = F_ALLOW_BLESSED
		1389	convert_blessed = F_CONV_BLESSED
1077	CODE:	1390	PPCODE:
1078	{	1391	{
1079	UV *uv = SvJSON (self);
1080	if (enable)	1392	if (enable)
1081	*uv \|= ix;	1393	self->flags \|= ix;
1082	else	1394	else
1083	*uv &= ~ix;	1395	self->flags &= ~ix;
1084		1396
1085	RETVAL = newSVsv (self);	1397	XPUSHs (ST (0));
1086	}	1398	}
1087	OUTPUT:
1088	RETVAL
1089		1399
1090	SV max_depth (SV self, UV max_depth = 0x80000000UL)	1400	void max_depth (JSON *self, UV max_depth = 0x80000000UL)
1091	CODE:	1401	PPCODE:
1092	{	1402	{
1093	UV *uv = SvJSON (self);
1094	UV log2 = 0;	1403	UV log2 = 0;
1095		1404
1096	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;	1405	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;
1097		1406
1098	while ((1UL << log2) < max_depth)	1407	while ((1UL << log2) < max_depth)
1099	++log2;	1408	++log2;
1100		1409
1101	uv = uv & ~F_MAXDEPTH \| (log2 << S_MAXDEPTH);	1410	self->flags = self->flags & ~F_MAXDEPTH \| (log2 << S_MAXDEPTH);
1102		1411
1103	RETVAL = newSVsv (self);	1412	XPUSHs (ST (0));
1104	}	1413	}
1105	OUTPUT:
1106	RETVAL
1107		1414
1108	void encode (SV self, SV scalar)	1415	void max_size (JSON *self, UV max_size = 0)
1109	PPCODE:	1416	PPCODE:
1110	XPUSHs (encode_json (scalar, *SvJSON (self)));	1417	{
		1418	UV log2 = 0;
1111		1419
1112	void decode (SV self, SV jsonstr)	1420	if (max_size > 0x80000000UL) max_size = 0x80000000UL;
		1421	if (max_size == 1) max_size = 2;
		1422
		1423	while ((1UL << log2) < max_size)
		1424	++log2;
		1425
		1426	self->flags = self->flags & ~F_MAXSIZE \| (log2 << S_MAXSIZE);
		1427
		1428	XPUSHs (ST (0));
		1429	}
		1430
		1431	void filter_json_object (JSON self, SV cb = &PL_sv_undef)
1113	PPCODE:	1432	PPCODE:
		1433	{
		1434	SvREFCNT_dec (self->cb_object);
		1435	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;
		1436
		1437	XPUSHs (ST (0));
		1438	}
		1439
		1440	void filter_json_single_key_object (JSON self, SV key, SV *cb = &PL_sv_undef)
		1441	PPCODE:
		1442	{
		1443	if (!self->cb_sk_object)
		1444	self->cb_sk_object = newHV ();
		1445
		1446	if (SvOK (cb))
		1447	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
		1448	else
		1449	{
		1450	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
		1451
		1452	if (!HvKEYS (self->cb_sk_object))
		1453	{
		1454	SvREFCNT_dec (self->cb_sk_object);
		1455	self->cb_sk_object = 0;
		1456	}
		1457	}
		1458
		1459	XPUSHs (ST (0));
		1460	}
		1461
		1462	void encode (JSON self, SV scalar)
		1463	PPCODE:
		1464	XPUSHs (encode_json (scalar, self));
		1465
		1466	void decode (JSON self, SV jsonstr)
		1467	PPCODE:
1114	XPUSHs (decode_json (jsonstr, *SvJSON (self)));	1468	XPUSHs (decode_json (jsonstr, self, 0));
		1469
		1470	void decode_prefix (JSON self, SV jsonstr)
		1471	PPCODE:
		1472	{
		1473	UV offset;
		1474	EXTEND (SP, 2);
		1475	PUSHs (decode_json (jsonstr, self, &offset));
		1476	PUSHs (sv_2mortal (newSVuv (offset)));
		1477	}
		1478
		1479	void DESTROY (JSON *self)
		1480	CODE:
		1481	SvREFCNT_dec (self->cb_sk_object);
		1482	SvREFCNT_dec (self->cb_object);
1115		1483
1116	PROTOTYPES: ENABLE	1484	PROTOTYPES: ENABLE
1117		1485
1118	void to_json (SV *scalar)	1486	void to_json (SV *scalar)
1119	ALIAS:
1120	objToJson = 0
1121	PPCODE:	1487	PPCODE:
		1488	{
		1489	JSON json = { F_DEFAULT \| F_UTF8 };
1122	XPUSHs (encode_json (scalar, F_DEFAULT \| F_UTF8));	1490	XPUSHs (encode_json (scalar, &json));
		1491	}
1123		1492
1124	void from_json (SV *jsonstr)	1493	void from_json (SV *jsonstr)
1125	ALIAS:
1126	jsonToObj = 0
1127	PPCODE:	1494	PPCODE:
		1495	{
		1496	JSON json = { F_DEFAULT \| F_UTF8 };
1128	XPUSHs (decode_json (jsonstr, F_DEFAULT \| F_UTF8));	1497	XPUSHs (decode_json (jsonstr, &json, 0));
		1498	}
1129		1499

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Comparing JSON-XS/XS.xs (file contents): Revision 1.29 by root, Wed May 9 15:34:04 2007 UTC vs. Revision 1.56 by root, Thu Jul 26 11:33:35 2007 UTC

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Comparing JSON-XS/XS.xs (file contents):
Revision 1.29 by root, Wed May 9 15:34:04 2007 UTC vs.
Revision 1.56 by root, Thu Jul 26 11:33:35 2007 UTC