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

Comparing JSON-XS/XS.xs (file contents):
Revision 1.34 by root, Wed May 23 22:07:13 2007 UTC vs.
Revision 1.46 by root, Mon Jun 25 22:11:39 2007 UTC

…		…
9		9
10	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)	10	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)
11	# define snprintf _snprintf // C compilers have this in stdio.h	11	# define snprintf _snprintf // C compilers have this in stdio.h
12	#endif	12	#endif
13		13
		14	// some old perls do not have this, try to make it work, no
		15	// guarentees, though. if it breaks, you get to keep the pieces.
		16	#ifndef UTF8_MAXBYTES
		17	# define UTF8_MAXBYTES 13
		18	#endif
		19
14	#define F_ASCII 0x00000001UL	20	#define F_ASCII 0x00000001UL
15	#define F_LATIN1 0x00000002UL	21	#define F_LATIN1 0x00000002UL
16	#define F_UTF8 0x00000004UL	22	#define F_UTF8 0x00000004UL
17	#define F_INDENT 0x00000008UL	23	#define F_INDENT 0x00000008UL
18	#define F_CANONICAL 0x00000010UL	24	#define F_CANONICAL 0x00000010UL
19	#define F_SPACE_BEFORE 0x00000020UL	25	#define F_SPACE_BEFORE 0x00000020UL
20	#define F_SPACE_AFTER 0x00000040UL	26	#define F_SPACE_AFTER 0x00000040UL
21	#define F_ALLOW_NONREF 0x00000100UL	27	#define F_ALLOW_NONREF 0x00000100UL
22	#define F_SHRINK 0x00000200UL	28	#define F_SHRINK 0x00000200UL
		29	#define F_ALLOW_BLESSED 0x00000400UL
		30	#define F_CONV_BLESSED 0x00000800UL // NYI
23	#define F_MAXDEPTH 0xf8000000UL	31	#define F_MAXDEPTH 0xf8000000UL
24	#define S_MAXDEPTH 27	32	#define S_MAXDEPTH 27
		33	#define F_MAXSIZE 0x01f00000UL
		34	#define S_MAXSIZE 20
25		35
26	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))	36	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
27		37	#define DEC_SIZE(flags) (1UL << ((flags & F_MAXSIZE ) >> S_MAXSIZE ))
28	// F_SELFCONVERT? <=> to_json/toJson
29	// F_BLESSED? <=> { $__class__$ => }
30		38
31	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER	39	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER
32	#define F_DEFAULT (9UL << S_MAXDEPTH)	40	#define F_DEFAULT (9UL << S_MAXDEPTH)
33		41
34	#define INIT_SIZE 32 // initial scalar size to be allocated	42	#define INIT_SIZE 32 // initial scalar size to be allocated
35	#define INDENT_STEP 3 // spaces per indentation level	43	#define INDENT_STEP 3 // spaces per indentation level
36		44
37	#define SHORT_STRING_LEN 512 // special-case strings of up to this size	45	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size
38		46
39	#define SB do {	47	#define SB do {
40	#define SE } while (0)	48	#define SE } while (0)
41		49
		50	#if __GNUC__ >= 3
		51	# define expect(expr,value) __builtin_expect ((expr),(value))
		52	# define inline inline
		53	#else
		54	# define expect(expr,value) (expr)
		55	# define inline static
		56	#endif
		57
		58	#define expect_false(expr) expect ((expr) != 0, 0)
		59	#define expect_true(expr) expect ((expr) != 0, 1)
		60
42	static HV *json_stash; // JSON::XS::	61	static HV json_stash, json_boolean_stash; // JSON::XS::
		62	static SV json_true, json_false;
43		63
44	/////////////////////////////////////////////////////////////////////////////	64	/////////////////////////////////////////////////////////////////////////////
45	// utility functions	65	// utility functions
46		66
47	static UV *	67	static UV *
…		…
70	// decode an utf-8 character and return it, or (UV)-1 in	90	// decode an utf-8 character and return it, or (UV)-1 in
71	// case of an error.	91	// case of an error.
72	// we special-case "safe" characters from U+80 .. U+7FF,	92	// we special-case "safe" characters from U+80 .. U+7FF,
73	// but use the very good perl function to parse anything else.	93	// but use the very good perl function to parse anything else.
74	// note that we never call this function for a ascii codepoints	94	// note that we never call this function for a ascii codepoints
75	static UV	95	inline UV
76	decode_utf8 (unsigned char s, STRLEN len, STRLEN clen)	96	decode_utf8 (unsigned char s, STRLEN len, STRLEN clen)
77	{	97	{
78	if (s[0] > 0xdf \|\| s[0] < 0xc2)	98	if (expect_false (s[0] > 0xdf \|\| s[0] < 0xc2))
79	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);	99	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);
80	else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf)	100	else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf)
81	{	101	{
82	*clen = 2;	102	*clen = 2;
83	return ((s[0] & 0x1f) << 6) \| (s[1] & 0x3f);	103	return ((s[0] & 0x1f) << 6) \| (s[1] & 0x3f);
…		…
101	U32 flags; // F_*	121	U32 flags; // F_*
102	U32 indent; // indentation level	122	U32 indent; // indentation level
103	U32 maxdepth; // max. indentation/recursion level	123	U32 maxdepth; // max. indentation/recursion level
104	} enc_t;	124	} enc_t;
105		125
106	static void	126	inline void
107	need (enc_t *enc, STRLEN len)	127	need (enc_t *enc, STRLEN len)
108	{	128	{
109	if (enc->cur + len >= enc->end)	129	if (expect_false (enc->cur + len >= enc->end))
110	{	130	{
111	STRLEN cur = enc->cur - SvPVX (enc->sv);	131	STRLEN cur = enc->cur - SvPVX (enc->sv);
112	SvGROW (enc->sv, cur + len + 1);	132	SvGROW (enc->sv, cur + len + 1);
113	enc->cur = SvPVX (enc->sv) + cur;	133	enc->cur = SvPVX (enc->sv) + cur;
114	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	134	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
115	}	135	}
116	}	136	}
117		137
118	static void	138	inline void
119	encode_ch (enc_t *enc, char ch)	139	encode_ch (enc_t *enc, char ch)
120	{	140	{
121	need (enc, 1);	141	need (enc, 1);
122	*enc->cur++ = ch;	142	*enc->cur++ = ch;
123	}	143	}
…		…
131		151
132	while (str < end)	152	while (str < end)
133	{	153	{
134	unsigned char ch = (unsigned char )str;	154	unsigned char ch = (unsigned char )str;
135		155
136	if (ch >= 0x20 && ch < 0x80) // most common case	156	if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case
137	{	157	{
138	if (ch == '"') // but with slow exceptions	158	if (expect_false (ch == '"')) // but with slow exceptions
139	{	159	{
140	need (enc, len += 1);	160	need (enc, len += 1);
141	*enc->cur++ = '\\';	161	*enc->cur++ = '\\';
142	*enc->cur++ = '"';	162	*enc->cur++ = '"';
143	}	163	}
144	else if (ch == '\\')	164	else if (expect_false (ch == '\\'))
145	{	165	{
146	need (enc, len += 1);	166	need (enc, len += 1);
147	*enc->cur++ = '\\';	167	*enc->cur++ = '\\';
148	*enc->cur++ = '\\';	168	*enc->cur++ = '\\';
149	}	169	}
…		…
167	STRLEN clen;	187	STRLEN clen;
168	UV uch;	188	UV uch;
169		189
170	if (is_utf8)	190	if (is_utf8)
171	{	191	{
172	//uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY);
173	uch = decode_utf8 (str, end - str, &clen);	192	uch = decode_utf8 (str, end - str, &clen);
174	if (clen == (STRLEN)-1)	193	if (clen == (STRLEN)-1)
175	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);	194	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);
176	}	195	}
177	else	196	else
…		…
233		252
234	--len;	253	--len;
235	}	254	}
236	}	255	}
237		256
238	static void	257	inline void
239	encode_indent (enc_t *enc)	258	encode_indent (enc_t *enc)
240	{	259	{
241	if (enc->flags & F_INDENT)	260	if (enc->flags & F_INDENT)
242	{	261	{
243	int spaces = enc->indent * INDENT_STEP;	262	int spaces = enc->indent * INDENT_STEP;
…		…
246	memset (enc->cur, ' ', spaces);	265	memset (enc->cur, ' ', spaces);
247	enc->cur += spaces;	266	enc->cur += spaces;
248	}	267	}
249	}	268	}
250		269
251	static void	270	inline void
252	encode_space (enc_t *enc)	271	encode_space (enc_t *enc)
253	{	272	{
254	need (enc, 1);	273	need (enc, 1);
255	encode_ch (enc, ' ');	274	encode_ch (enc, ' ');
256	}	275	}
257		276
258	static void	277	inline void
259	encode_nl (enc_t *enc)	278	encode_nl (enc_t *enc)
260	{	279	{
261	if (enc->flags & F_INDENT)	280	if (enc->flags & F_INDENT)
262	{	281	{
263	need (enc, 1);	282	need (enc, 1);
264	encode_ch (enc, '\n');	283	encode_ch (enc, '\n');
265	}	284	}
266	}	285	}
267		286
268	static void	287	inline void
269	encode_comma (enc_t *enc)	288	encode_comma (enc_t *enc)
270	{	289	{
271	encode_ch (enc, ',');	290	encode_ch (enc, ',');
272		291
273	if (enc->flags & F_INDENT)	292	if (enc->flags & F_INDENT)
…		…
452	svtype svt;	471	svtype svt;
453		472
454	SvGETMAGIC (sv);	473	SvGETMAGIC (sv);
455	svt = SvTYPE (sv);	474	svt = SvTYPE (sv);
456		475
		476	if (expect_false (SvOBJECT (sv)))
		477	{
		478	if (SvSTASH (sv) == json_boolean_stash)
		479	{
		480	if (SvIV (sv) == 0)
		481	encode_str (enc, "false", 5, 0);
		482	else
		483	encode_str (enc, "true", 4, 0);
		484	}
		485	else
		486	{
		487	#if 0
		488	if (0 && sv_derived_from (rv, "JSON::Literal"))
		489	{
		490	// not yet
		491	}
		492	#endif
		493	if (enc->flags & F_CONV_BLESSED)
		494	{
		495	// we re-bless the reference to get overload and other niceties right
		496	GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 1);
		497
		498	if (to_json)
		499	{
		500	dSP;
		501	ENTER;
		502	SAVETMPS;
		503	PUSHMARK (SP);
		504	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
		505
		506	// calling with G_SCALAR ensures that we always get a 1 reutrn value
		507	// check anyways.
		508	PUTBACK;
		509	assert (1 == call_sv ((SV *)GvCV (to_json), G_SCALAR));
		510	SPAGAIN;
		511
		512	encode_sv (enc, POPs);
		513
		514	FREETMPS;
		515	LEAVE;
		516	}
		517	else if (enc->flags & F_ALLOW_BLESSED)
		518	encode_str (enc, "null", 4, 0);
		519	else
		520	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
		521	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		522	}
		523	else if (enc->flags & F_ALLOW_BLESSED)
		524	encode_str (enc, "null", 4, 0);
		525	else
		526	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",
		527	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		528	}
		529	}
457	if (svt == SVt_PVHV)	530	else if (svt == SVt_PVHV)
458	encode_hv (enc, (HV *)sv);	531	encode_hv (enc, (HV *)sv);
459	else if (svt == SVt_PVAV)	532	else if (svt == SVt_PVAV)
460	encode_av (enc, (AV *)sv);	533	encode_av (enc, (AV *)sv);
461	else if (svt < SVt_PVAV)	534	else if (svt < SVt_PVAV)
462	{	535	{
…		…
486	encode_str (enc, str, len, SvUTF8 (sv));	559	encode_str (enc, str, len, SvUTF8 (sv));
487	encode_ch (enc, '"');	560	encode_ch (enc, '"');
488	}	561	}
489	else if (SvNOKp (sv))	562	else if (SvNOKp (sv))
490	{	563	{
		564	// trust that perl will do the right thing w.r.t. JSON syntax.
491	need (enc, NV_DIG + 32);	565	need (enc, NV_DIG + 32);
492	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);	566	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
493	enc->cur += strlen (enc->cur);	567	enc->cur += strlen (enc->cur);
494	}	568	}
495	else if (SvIOKp (sv))	569	else if (SvIOKp (sv))
496	{	570	{
497	need (enc, 64);	571	// we assume we can always read an IV as a UV
		572	if (SvUV (sv) & ~(UV)0x7fff)
		573	{
		574	// large integer, use the (rather slow) snprintf way.
		575	need (enc, sizeof (UV) * 3);
498	enc->cur +=	576	enc->cur +=
499	SvIsUV(sv)	577	SvIsUV(sv)
500	? snprintf (enc->cur, 64, "%"UVuf, (UV)SvUVX (sv))	578	? snprintf (enc->cur, sizeof (UV) * 3, "%"UVuf, (UV)SvUVX (sv))
501	: snprintf (enc->cur, 64, "%"IVdf, (IV)SvIVX (sv));	579	: snprintf (enc->cur, sizeof (UV) * 3, "%"IVdf, (IV)SvIVX (sv));
		580	}
		581	else
		582	{
		583	// optimise the "small number case"
		584	// code will likely be branchless and use only a single multiplication
		585	I32 i = SvIV (sv);
		586	U32 u;
		587	char digit, nz = 0;
		588
		589	need (enc, 6);
		590
		591	*enc->cur = '-'; enc->cur += i < 0 ? 1 : 0;
		592	u = i < 0 ? -i : i;
		593
		594	// convert to 4.28 fixed-point representation
		595	u = u * ((0xfffffff + 10000) / 10000); // 10**5, 5 fractional digits
		596
		597	// now output digit by digit, each time masking out the integer part
		598	// and multiplying by 5 while moving the decimal point one to the right,
		599	// resulting in a net multiplication by 10.
		600	// we always write the digit to memory but conditionally increment
		601	// the pointer, to ease the usage of conditional move instructions.
		602	digit = u >> 28; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0xfffffff) 5;
		603	digit = u >> 27; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x7ffffff) 5;
		604	digit = u >> 26; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x3ffffff) 5;
		605	digit = u >> 25; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x1ffffff) 5;
		606	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
		607	}
502	}	608	}
503	else if (SvROK (sv))	609	else if (SvROK (sv))
504	encode_rv (enc, SvRV (sv));	610	encode_rv (enc, SvRV (sv));
505	else if (!SvOK (sv))	611	else if (!SvOK (sv))
506	encode_str (enc, "null", 4, 0);	612	encode_str (enc, "null", 4, 0);
…		…
551	U32 flags; // F_*	657	U32 flags; // F_*
552	U32 depth; // recursion depth	658	U32 depth; // recursion depth
553	U32 maxdepth; // recursion depth limit	659	U32 maxdepth; // recursion depth limit
554	} dec_t;	660	} dec_t;
555		661
556	static void	662	inline void
557	decode_ws (dec_t *dec)	663	decode_ws (dec_t *dec)
558	{	664	{
559	for (;;)	665	for (;;)
560	{	666	{
561	char ch = *dec->cur;	667	char ch = *dec->cur;
…		…
587	decode_4hex (dec_t *dec)	693	decode_4hex (dec_t *dec)
588	{	694	{
589	signed char d1, d2, d3, d4;	695	signed char d1, d2, d3, d4;
590	unsigned char cur = (unsigned char )dec->cur;	696	unsigned char cur = (unsigned char )dec->cur;
591		697
592	d1 = decode_hexdigit [cur [0]]; if (d1 < 0) ERR ("four hexadecimal digits expected");	698	d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("exactly four hexadecimal digits expected");
593	d2 = decode_hexdigit [cur [1]]; if (d2 < 0) ERR ("four hexadecimal digits expected");	699	d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("exactly four hexadecimal digits expected");
594	d3 = decode_hexdigit [cur [2]]; if (d3 < 0) ERR ("four hexadecimal digits expected");	700	d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("exactly four hexadecimal digits expected");
595	d4 = decode_hexdigit [cur [3]]; if (d4 < 0) ERR ("four hexadecimal digits expected");	701	d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("exactly four hexadecimal digits expected");
596		702
597	dec->cur += 4;	703	dec->cur += 4;
598		704
599	return ((UV)d1) << 12	705	return ((UV)d1) << 12
600	\| ((UV)d2) << 8	706	\| ((UV)d2) << 8
…		…
608	static SV *	714	static SV *
609	decode_str (dec_t *dec)	715	decode_str (dec_t *dec)
610	{	716	{
611	SV *sv = 0;	717	SV *sv = 0;
612	int utf8 = 0;	718	int utf8 = 0;
		719	char *dec_cur = dec->cur;
613		720
614	do	721	do
615	{	722	{
616	char buf [SHORT_STRING_LEN + UTF8_MAXBYTES];	723	char buf [SHORT_STRING_LEN + UTF8_MAXBYTES];
617	char *cur = buf;	724	char *cur = buf;
618		725
619	do	726	do
620	{	727	{
621	unsigned char ch = (unsigned char )dec->cur++;	728	unsigned char ch = (unsigned char )dec_cur++;
622		729
623	if (ch == '"')	730	if (expect_false (ch == '"'))
624	{	731	{
625	--dec->cur;	732	--dec_cur;
626	break;	733	break;
627	}	734	}
628	else if (ch == '\\')	735	else if (expect_false (ch == '\\'))
629	{	736	{
630	switch (*dec->cur)	737	switch (*dec_cur)
631	{	738	{
632	case '\\':	739	case '\\':
633	case '/':	740	case '/':
634	case '"': cur++ = dec->cur++; break;	741	case '"': cur++ = dec_cur++; break;
635		742
636	case 'b': ++dec->cur; *cur++ = '\010'; break;	743	case 'b': ++dec_cur; *cur++ = '\010'; break;
637	case 't': ++dec->cur; *cur++ = '\011'; break;	744	case 't': ++dec_cur; *cur++ = '\011'; break;
638	case 'n': ++dec->cur; *cur++ = '\012'; break;	745	case 'n': ++dec_cur; *cur++ = '\012'; break;
639	case 'f': ++dec->cur; *cur++ = '\014'; break;	746	case 'f': ++dec_cur; *cur++ = '\014'; break;
640	case 'r': ++dec->cur; *cur++ = '\015'; break;	747	case 'r': ++dec_cur; *cur++ = '\015'; break;
641		748
642	case 'u':	749	case 'u':
643	{	750	{
644	UV lo, hi;	751	UV lo, hi;
645	++dec->cur;	752	++dec_cur;
646		753
		754	dec->cur = dec_cur;
647	hi = decode_4hex (dec);	755	hi = decode_4hex (dec);
		756	dec_cur = dec->cur;
648	if (hi == (UV)-1)	757	if (hi == (UV)-1)
649	goto fail;	758	goto fail;
650		759
651	// possibly a surrogate pair	760	// possibly a surrogate pair
652	if (hi >= 0xd800)	761	if (hi >= 0xd800)
653	if (hi < 0xdc00)	762	if (hi < 0xdc00)
654	{	763	{
655	if (dec->cur [0] != '\\' \|\| dec->cur [1] != 'u')	764	if (dec_cur [0] != '\\' \|\| dec_cur [1] != 'u')
656	ERR ("missing low surrogate character in surrogate pair");	765	ERR ("missing low surrogate character in surrogate pair");
657		766
658	dec->cur += 2;	767	dec_cur += 2;
659		768
		769	dec->cur = dec_cur;
660	lo = decode_4hex (dec);	770	lo = decode_4hex (dec);
		771	dec_cur = dec->cur;
661	if (lo == (UV)-1)	772	if (lo == (UV)-1)
662	goto fail;	773	goto fail;
663		774
664	if (lo < 0xdc00 \|\| lo >= 0xe000)	775	if (lo < 0xdc00 \|\| lo >= 0xe000)
665	ERR ("surrogate pair expected");	776	ERR ("surrogate pair expected");
…		…
679	*cur++ = hi;	790	*cur++ = hi;
680	}	791	}
681	break;	792	break;
682		793
683	default:	794	default:
684	--dec->cur;	795	--dec_cur;
685	ERR ("illegal backslash escape sequence in string");	796	ERR ("illegal backslash escape sequence in string");
686	}	797	}
687	}	798	}
688	else if (ch >= 0x20 && ch <= 0x7f)	799	else if (expect_true (ch >= 0x20 && ch <= 0x7f))
689	*cur++ = ch;	800	*cur++ = ch;
690	else if (ch >= 0x80)	801	else if (ch >= 0x80)
691	{	802	{
692	STRLEN clen;	803	STRLEN clen;
693	UV uch;	804	UV uch;
694		805
695	--dec->cur;	806	--dec_cur;
696		807
697	uch = decode_utf8 (dec->cur, dec->end - dec->cur, &clen);	808	uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
698	if (clen == (STRLEN)-1)	809	if (clen == (STRLEN)-1)
699	ERR ("malformed UTF-8 character in JSON string");	810	ERR ("malformed UTF-8 character in JSON string");
700		811
701	do	812	do
702	cur++ = dec->cur++;	813	cur++ = dec_cur++;
703	while (--clen);	814	while (--clen);
704		815
705	utf8 = 1;	816	utf8 = 1;
706	}	817	}
707	else	818	else
708	{	819	{
709	--dec->cur;	820	--dec_cur;
710		821
711	if (!ch)	822	if (!ch)
712	ERR ("unexpected end of string while parsing JSON string");	823	ERR ("unexpected end of string while parsing JSON string");
713	else	824	else
714	ERR ("invalid character encountered while parsing JSON string");	825	ERR ("invalid character encountered while parsing JSON string");
…		…
727	}	838	}
728	else	839	else
729	sv = newSVpvn (buf, len);	840	sv = newSVpvn (buf, len);
730	}	841	}
731	}	842	}
732	while (*dec->cur != '"');	843	while (*dec_cur != '"');
733		844
734	++dec->cur;	845	++dec_cur;
735		846
736	if (sv)	847	if (sv)
737	{	848	{
738	SvPOK_only (sv);	849	SvPOK_only (sv);
739	*SvEND (sv) = 0;	850	*SvEND (sv) = 0;
…		…
742	SvUTF8_on (sv);	853	SvUTF8_on (sv);
743	}	854	}
744	else	855	else
745	sv = newSVpvn ("", 0);	856	sv = newSVpvn ("", 0);
746		857
		858	dec->cur = dec_cur;
747	return sv;	859	return sv;
748		860
749	fail:	861	fail:
		862	dec->cur = dec_cur;
750	return 0;	863	return 0;
751	}	864	}
752		865
753	static SV *	866	static SV *
754	decode_num (dec_t *dec)	867	decode_num (dec_t *dec)
…		…
812	is_nv = 1;	925	is_nv = 1;
813	}	926	}
814		927
815	if (!is_nv)	928	if (!is_nv)
816	{	929	{
817	UV uv;	930	// special case the rather common 1..4-digit-int case, assumes 32 bit ints or so
818	int numtype = grok_number (start, dec->cur - start, &uv);	931	if (*start == '-')
819	if (numtype & IS_NUMBER_IN_UV)	932	switch (dec->cur - start)
820	if (numtype & IS_NUMBER_NEG)
821	{	933	{
822	if (uv < (UV)IV_MIN)	934	case 2: return newSViv (-( start [1] - '0' * 1));
823	return newSViv (-(IV)uv);	935	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));
		936	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
		937	case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
824	}	938	}
		939	else
		940	switch (dec->cur - start)
		941	{
		942	case 1: return newSViv ( start [0] - '0' * 1);
		943	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
		944	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
		945	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
		946	}
		947
		948	{
		949	UV uv;
		950	int numtype = grok_number (start, dec->cur - start, &uv);
		951	if (numtype & IS_NUMBER_IN_UV)
		952	if (numtype & IS_NUMBER_NEG)
		953	{
		954	if (uv < (UV)IV_MIN)
		955	return newSViv (-(IV)uv);
		956	}
825	else	957	else
826	return newSVuv (uv);	958	return newSVuv (uv);
		959
		960	// here would likely be the place for bigint support
827	}	961	}
		962	}
828		963
		964	// if we ever support bigint or bigfloat, this is the place for bigfloat
829	return newSVnv (Atof (start));	965	return newSVnv (Atof (start));
830		966
831	fail:	967	fail:
832	return 0;	968	return 0;
833	}	969	}
…		…
887	if (*dec->cur == '}')	1023	if (*dec->cur == '}')
888	++dec->cur;	1024	++dec->cur;
889	else	1025	else
890	for (;;)	1026	for (;;)
891	{	1027	{
892	SV key, value;
893
894	decode_ws (dec); EXPECT_CH ('"');	1028	decode_ws (dec); EXPECT_CH ('"');
895		1029
896	key = decode_str (dec);	1030	// heuristic: assume that
897	if (!key)	1031	// a) decode_str + hv_store_ent are abysmally slow
898	goto fail;	1032	// b) most hash keys are short, simple ascii text
		1033	// so try to "fast-match" such strings to avoid
		1034	// the overhead of hv_store_ent.
		1035	{
		1036	SV *value;
		1037	char *p = dec->cur;
		1038	char *e = p + 24; // only try up to 24 bytes
899		1039
900	decode_ws (dec); EXPECT_CH (':');	1040	for (;;)
901
902	value = decode_sv (dec);
903	if (!value)
904	{	1041	{
		1042	if (p == e \|\| p < 0x20 \|\| p >= 0x80 \|\| *p == '\\')
		1043	{
		1044	// slow path, back up and use decode_str
		1045	SV *key = decode_str (dec);
		1046	if (!key)
		1047	goto fail;
		1048
		1049	decode_ws (dec); EXPECT_CH (':');
		1050
		1051	value = decode_sv (dec);
		1052	if (!value)
		1053	{
		1054	SvREFCNT_dec (key);
		1055	goto fail;
		1056	}
		1057
		1058	hv_store_ent (hv, key, value, 0);
905	SvREFCNT_dec (key);	1059	SvREFCNT_dec (key);
		1060
		1061	break;
		1062	}
		1063	else if (*p == '"')
		1064	{
		1065	// fast path, got a simple key
		1066	char *key = dec->cur;
		1067	int len = p - key;
		1068	dec->cur = p + 1;
		1069
		1070	decode_ws (dec); EXPECT_CH (':');
		1071
		1072	value = decode_sv (dec);
		1073	if (!value)
906	goto fail;	1074	goto fail;
		1075
		1076	hv_store (hv, key, len, value, 0);
		1077
		1078	break;
		1079	}
		1080
		1081	++p;
907	}	1082	}
908		1083	}
909	hv_store_ent (hv, key, value, 0);
910	SvREFCNT_dec (key);
911		1084
912	decode_ws (dec);	1085	decode_ws (dec);
913		1086
914	if (*dec->cur == '}')	1087	if (*dec->cur == '}')
915	{	1088	{
…		…
934		1107
935	static SV *	1108	static SV *
936	decode_sv (dec_t *dec)	1109	decode_sv (dec_t *dec)
937	{	1110	{
938	decode_ws (dec);	1111	decode_ws (dec);
		1112
		1113	// the beauty of JSON: you need exactly one character lookahead
		1114	// to parse anything.
939	switch (*dec->cur)	1115	switch (*dec->cur)
940	{	1116	{
941	case '"': ++dec->cur; return decode_str (dec);	1117	case '"': ++dec->cur; return decode_str (dec);
942	case '[': ++dec->cur; return decode_av (dec);	1118	case '[': ++dec->cur; return decode_av (dec);
943	case '{': ++dec->cur; return decode_hv (dec);	1119	case '{': ++dec->cur; return decode_hv (dec);
…		…
949		1125
950	case 't':	1126	case 't':
951	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1127	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
952	{	1128	{
953	dec->cur += 4;	1129	dec->cur += 4;
954	return newSViv (1);	1130	return SvREFCNT_inc (json_true);
955	}	1131	}
956	else	1132	else
957	ERR ("'true' expected");	1133	ERR ("'true' expected");
958		1134
959	break;	1135	break;
960		1136
961	case 'f':	1137	case 'f':
962	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))	1138	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
963	{	1139	{
964	dec->cur += 5;	1140	dec->cur += 5;
965	return newSViv (0);	1141	return SvREFCNT_inc (json_false);
966	}	1142	}
967	else	1143	else
968	ERR ("'false' expected");	1144	ERR ("'false' expected");
969		1145
970	break;	1146	break;
…		…
997	SV *sv;	1173	SV *sv;
998		1174
999	SvGETMAGIC (string);	1175	SvGETMAGIC (string);
1000	SvUPGRADE (string, SVt_PV);	1176	SvUPGRADE (string, SVt_PV);
1001		1177
		1178	if (flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (flags))
		1179	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		1180	(unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (flags));
		1181
1002	if (flags & F_UTF8)	1182	if (flags & F_UTF8)
1003	sv_utf8_downgrade (string, 0);	1183	sv_utf8_downgrade (string, 0);
1004	else	1184	else
1005	sv_utf8_upgrade (string);	1185	sv_utf8_upgrade (string);
1006		1186
…		…
1073		1253
1074	BOOT:	1254	BOOT:
1075	{	1255	{
1076	int i;	1256	int i;
1077		1257
1078	memset (decode_hexdigit, 0xff, 256);
1079
1080	for (i = 0; i < 256; ++i)	1258	for (i = 0; i < 256; ++i)
1081	decode_hexdigit [i] =	1259	decode_hexdigit [i] =
1082	i >= '0' && i <= '9' ? i - '0'	1260	i >= '0' && i <= '9' ? i - '0'
1083	: i >= 'a' && i <= 'f' ? i - 'a' + 10	1261	: i >= 'a' && i <= 'f' ? i - 'a' + 10
1084	: i >= 'A' && i <= 'F' ? i - 'A' + 10	1262	: i >= 'A' && i <= 'F' ? i - 'A' + 10
1085	: -1;	1263	: -1;
1086		1264
1087	json_stash = gv_stashpv ("JSON::XS", 1);	1265	json_stash = gv_stashpv ("JSON::XS" , 1);
		1266	json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);
		1267
		1268	json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true );
		1269	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);
1088	}	1270	}
1089		1271
1090	PROTOTYPES: DISABLE	1272	PROTOTYPES: DISABLE
1091		1273
1092	SV new (char dummy)	1274	SV new (char dummy)
…		…
1095	OUTPUT:	1277	OUTPUT:
1096	RETVAL	1278	RETVAL
1097		1279
1098	SV ascii (SV self, int enable = 1)	1280	SV ascii (SV self, int enable = 1)
1099	ALIAS:	1281	ALIAS:
1100	ascii = F_ASCII	1282	ascii = F_ASCII
1101	latin1 = F_LATIN1	1283	latin1 = F_LATIN1
1102	utf8 = F_UTF8	1284	utf8 = F_UTF8
1103	indent = F_INDENT	1285	indent = F_INDENT
1104	canonical = F_CANONICAL	1286	canonical = F_CANONICAL
1105	space_before = F_SPACE_BEFORE	1287	space_before = F_SPACE_BEFORE
1106	space_after = F_SPACE_AFTER	1288	space_after = F_SPACE_AFTER
1107	pretty = F_PRETTY	1289	pretty = F_PRETTY
1108	allow_nonref = F_ALLOW_NONREF	1290	allow_nonref = F_ALLOW_NONREF
1109	shrink = F_SHRINK	1291	shrink = F_SHRINK
		1292	allow_blessed = F_ALLOW_BLESSED
		1293	convert_blessed = F_CONV_BLESSED
1110	CODE:	1294	CODE:
1111	{	1295	{
1112	UV *uv = SvJSON (self);	1296	UV *uv = SvJSON (self);
1113	if (enable)	1297	if (enable)
1114	*uv \|= ix;	1298	*uv \|= ix;
…		…
1136	RETVAL = newSVsv (self);	1320	RETVAL = newSVsv (self);
1137	}	1321	}
1138	OUTPUT:	1322	OUTPUT:
1139	RETVAL	1323	RETVAL
1140		1324
		1325	SV max_size (SV self, UV max_size = 0)
		1326	CODE:
		1327	{
		1328	UV *uv = SvJSON (self);
		1329	UV log2 = 0;
		1330
		1331	if (max_size > 0x80000000UL) max_size = 0x80000000UL;
		1332	if (max_size == 1) max_size = 2;
		1333
		1334	while ((1UL << log2) < max_size)
		1335	++log2;
		1336
		1337	uv = uv & ~F_MAXSIZE \| (log2 << S_MAXSIZE);
		1338
		1339	RETVAL = newSVsv (self);
		1340	}
		1341	OUTPUT:
		1342	RETVAL
		1343
1141	void encode (SV self, SV scalar)	1344	void encode (SV self, SV scalar)
1142	PPCODE:	1345	PPCODE:
1143	XPUSHs (encode_json (scalar, *SvJSON (self)));	1346	XPUSHs (encode_json (scalar, *SvJSON (self)));
1144		1347
1145	void decode (SV self, SV jsonstr)	1348	void decode (SV self, SV jsonstr)

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Comparing JSON-XS/XS.xs (file contents): Revision 1.34 by root, Wed May 23 22:07:13 2007 UTC vs. Revision 1.46 by root, Mon Jun 25 22:11:39 2007 UTC

Diff Legend

Comparing JSON-XS/XS.xs (file contents):
Revision 1.34 by root, Wed May 23 22:07:13 2007 UTC vs.
Revision 1.46 by root, Mon Jun 25 22:11:39 2007 UTC