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

Comparing JSON-XS/XS.xs (file contents):
Revision 1.72 by root, Wed Mar 19 04:08:22 2008 UTC vs.
Revision 1.107 by root, Wed Mar 17 01:45:43 2010 UTC

…		…
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 <limits.h>
9	#include <float.h>	10	#include <float.h>
10		11
11	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)	12	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)
12	# define snprintf _snprintf // C compilers have this in stdio.h	13	# define snprintf _snprintf // C compilers have this in stdio.h
13	#endif	14	#endif
14		15
15	// some old perls do not have this, try to make it work, no	16	// 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	// guarantees, though. if it breaks, you get to keep the pieces.
17	#ifndef UTF8_MAXBYTES	18	#ifndef UTF8_MAXBYTES
18	# define UTF8_MAXBYTES 13	19	# define UTF8_MAXBYTES 13
19	#endif	20	#endif
		21
		22	// three extra for rounding, sign, and end of string
		23	#define IVUV_MAXCHARS (sizeof (UV) * CHAR_BIT * 28 / 93 + 3)
20		24
21	#define F_ASCII 0x00000001UL	25	#define F_ASCII 0x00000001UL
22	#define F_LATIN1 0x00000002UL	26	#define F_LATIN1 0x00000002UL
23	#define F_UTF8 0x00000004UL	27	#define F_UTF8 0x00000004UL
24	#define F_INDENT 0x00000008UL	28	#define F_INDENT 0x00000008UL
…		…
28	#define F_ALLOW_NONREF 0x00000100UL	32	#define F_ALLOW_NONREF 0x00000100UL
29	#define F_SHRINK 0x00000200UL	33	#define F_SHRINK 0x00000200UL
30	#define F_ALLOW_BLESSED 0x00000400UL	34	#define F_ALLOW_BLESSED 0x00000400UL
31	#define F_CONV_BLESSED 0x00000800UL	35	#define F_CONV_BLESSED 0x00000800UL
32	#define F_RELAXED 0x00001000UL	36	#define F_RELAXED 0x00001000UL
33		37	#define F_ALLOW_UNKNOWN 0x00002000UL
34	#define F_MAXDEPTH 0xf8000000UL
35	#define S_MAXDEPTH 27
36	#define F_MAXSIZE 0x01f00000UL
37	#define S_MAXSIZE 20
38	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing	38	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
39		39
40	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
41	#define DEC_SIZE(flags) (1UL << ((flags & F_MAXSIZE ) >> S_MAXSIZE ))
42
43	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER	40	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER
44	#define F_DEFAULT (9UL << S_MAXDEPTH)
45		41
46	#define INIT_SIZE 32 // initial scalar size to be allocated	42	#define INIT_SIZE 32 // initial scalar size to be allocated
47	#define INDENT_STEP 3 // spaces per indentation level	43	#define INDENT_STEP 3 // spaces per indentation level
48		44
49	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size	45	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size
…		…
64		60
65	#define IN_RANGE_INC(type,val,beg,end) \	61	#define IN_RANGE_INC(type,val,beg,end) \
66	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \	62	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
67	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))	63	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
68		64
		65	#define ERR_NESTING_EXCEEDED "json text or perl structure exceeds maximum nesting level (max_depth set too low?)"
		66
69	#ifdef USE_ITHREADS	67	#ifdef USE_ITHREADS
70	# define JSON_SLOW 1	68	# define JSON_SLOW 1
71	# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1))	69	# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1))
72	#else	70	#else
73	# define JSON_SLOW 0	71	# define JSON_SLOW 0
…		…
75	#endif	73	#endif
76		74
77	static HV json_stash, json_boolean_stash; // JSON::XS::	75	static HV json_stash, json_boolean_stash; // JSON::XS::
78	static SV json_true, json_false;	76	static SV json_true, json_false;
79		77
		78	enum {
		79	INCR_M_WS = 0, // initial whitespace skipping, must be 0
		80	INCR_M_STR, // inside string
		81	INCR_M_BS, // inside backslash
		82	INCR_M_C0, // inside comment in initial whitespace sequence
		83	INCR_M_C1, // inside comment in other places
		84	INCR_M_JSON // outside anything, count nesting
		85	};
		86
		87	#define INCR_DONE(json) ((json)->incr_nest <= 0 && (json)->incr_mode == INCR_M_JSON)
		88
80	typedef struct {	89	typedef struct {
81	U32 flags;	90	U32 flags;
		91	U32 max_depth;
		92	STRLEN max_size;
		93
82	SV *cb_object;	94	SV *cb_object;
83	HV *cb_sk_object;	95	HV *cb_sk_object;
		96
		97	// for the incremental parser
		98	SV *incr_text; // the source text so far
		99	STRLEN incr_pos; // the current offset into the text
		100	int incr_nest; // {[]}-nesting level
		101	unsigned char incr_mode;
84	} JSON;	102	} JSON;
		103
		104	INLINE void
		105	json_init (JSON *json)
		106	{
		107	Zero (json, 1, JSON);
		108	json->max_depth = 512;
		109	}
85		110
86	/////////////////////////////////////////////////////////////////////////////	111	/////////////////////////////////////////////////////////////////////////////
87	// utility functions	112	// utility functions
88		113
		114	INLINE SV *
		115	get_bool (const char *name)
		116	{
		117	SV *sv = get_sv (name, 1);
		118
		119	SvREADONLY_on (sv);
		120	SvREADONLY_on (SvRV (sv));
		121
		122	return sv;
		123	}
		124
89	INLINE void	125	INLINE void
90	shrink (SV *sv)	126	shrink (SV *sv)
91	{	127	{
92	sv_utf8_downgrade (sv, 1);	128	sv_utf8_downgrade (sv, 1);
		129
93	if (SvLEN (sv) > SvCUR (sv) + 1)	130	if (SvLEN (sv) > SvCUR (sv) + 1)
94	{	131	{
95	#ifdef SvPV_shrink_to_cur	132	#ifdef SvPV_shrink_to_cur
96	SvPV_shrink_to_cur (sv);	133	SvPV_shrink_to_cur (sv);
97	#elif defined (SvPV_renew)	134	#elif defined (SvPV_renew)
…		…
123	// this function takes advantage of this fact, although current gccs	160	// this function takes advantage of this fact, although current gccs
124	// seem to optimise the check for >= 0x80 away anyways	161	// seem to optimise the check for >= 0x80 away anyways
125	INLINE unsigned char *	162	INLINE unsigned char *
126	encode_utf8 (unsigned char *s, UV ch)	163	encode_utf8 (unsigned char *s, UV ch)
127	{	164	{
128	if (ch <= 0x7FF)	165	if (expect_false (ch < 0x000080))
129	{	166	*s++ = ch;
130	*s++ = (ch >> 6) \| 0xc0;	167	else if (expect_true (ch < 0x000800))
131	*s++ = (ch & 0x3f) \| 0x80;	168	*s++ = 0xc0 \| ( ch >> 6),
132	}	169	*s++ = 0x80 \| ( ch & 0x3f);
133	else	170	else if ( ch < 0x010000)
134	s = uvuni_to_utf8_flags (s, ch, 0);	171	*s++ = 0xe0 \| ( ch >> 12),
		172	*s++ = 0x80 \| ((ch >> 6) & 0x3f),
		173	*s++ = 0x80 \| ( ch & 0x3f);
		174	else if ( ch < 0x110000)
		175	*s++ = 0xf0 \| ( ch >> 18),
		176	*s++ = 0x80 \| ((ch >> 12) & 0x3f),
		177	*s++ = 0x80 \| ((ch >> 6) & 0x3f),
		178	*s++ = 0x80 \| ( ch & 0x3f);
135		179
136	return s;	180	return s;
137	}	181	}
138		182
		183	// convert offset pointer to character index, sv must be string
		184	static STRLEN
		185	ptr_to_index (SV sv, char offset)
		186	{
		187	return SvUTF8 (sv)
		188	? utf8_distance (offset, SvPVX (sv))
		189	: offset - SvPVX (sv);
		190	}
		191
		192	/////////////////////////////////////////////////////////////////////////////
		193	// fp hell
		194
		195	// scan a group of digits, and a trailing exponent
		196	static void
		197	json_atof_scan1 (const char s, NV accum, int *expo, int postdp, int maxdepth)
		198	{
		199	UV uaccum = 0;
		200	int eaccum = 0;
		201
		202	// if we recurse too deep, skip all remaining digits
		203	// to avoid a stack overflow attack
		204	if (expect_false (--maxdepth <= 0))
		205	while (((U8)*s - '0') < 10)
		206	++s;
		207
		208	for (;;)
		209	{
		210	U8 dig = (U8)*s - '0';
		211
		212	if (expect_false (dig >= 10))
		213	{
		214	if (dig == (U8)((U8)'.' - (U8)'0'))
		215	{
		216	++s;
		217	json_atof_scan1 (s, accum, expo, 1, maxdepth);
		218	}
		219	else if ((dig \| ' ') == 'e' - '0')
		220	{
		221	int exp2 = 0;
		222	int neg = 0;
		223
		224	++s;
		225
		226	if (*s == '-')
		227	{
		228	++s;
		229	neg = 1;
		230	}
		231	else if (*s == '+')
		232	++s;
		233
		234	while ((dig = (U8)*s - '0') < 10)
		235	exp2 = exp2 * 10 + *s++ - '0';
		236
		237	*expo += neg ? -exp2 : exp2;
		238	}
		239
		240	break;
		241	}
		242
		243	++s;
		244
		245	uaccum = uaccum * 10 + dig;
		246	++eaccum;
		247
		248	// if we have too many digits, then recurse for more
		249	// we actually do this for rather few digits
		250	if (uaccum >= (UV_MAX - 9) / 10)
		251	{
		252	if (postdp) *expo -= eaccum;
		253	json_atof_scan1 (s, accum, expo, postdp, maxdepth);
		254	if (postdp) *expo += eaccum;
		255
		256	break;
		257	}
		258	}
		259
		260	// this relies greatly on the quality of the pow ()
		261	// implementation of the platform, but a good
		262	// implementation is hard to beat.
		263	if (postdp) *expo -= eaccum;
		264	accum += uaccum Perl_pow (10., *expo);
		265	*expo += eaccum;
		266	}
		267
		268	static NV
		269	json_atof (const char *s)
		270	{
		271	NV accum = 0.;
		272	int expo = 0;
		273	int neg = 0;
		274
		275	if (*s == '-')
		276	{
		277	++s;
		278	neg = 1;
		279	}
		280
		281	// a recursion depth of ten gives us >>500 bits
		282	json_atof_scan1 (s, &accum, &expo, 0, 10);
		283
		284	return neg ? -accum : accum;
		285	}
139	/////////////////////////////////////////////////////////////////////////////	286	/////////////////////////////////////////////////////////////////////////////
140	// encoder	287	// encoder
141		288
142	// structure used for encoding JSON	289	// structure used for encoding JSON
143	typedef struct	290	typedef struct
…		…
145	char *cur; // SvPVX (sv) + current output position	292	char *cur; // SvPVX (sv) + current output position
146	char *end; // SvEND (sv)	293	char *end; // SvEND (sv)
147	SV *sv; // result scalar	294	SV *sv; // result scalar
148	JSON json;	295	JSON json;
149	U32 indent; // indentation level	296	U32 indent; // indentation level
150	U32 maxdepth; // max. indentation/recursion level
151	UV limit; // escape character values >= this value when encoding	297	UV limit; // escape character values >= this value when encoding
152	} enc_t;	298	} enc_t;
153		299
154	INLINE void	300	INLINE void
155	need (enc_t *enc, STRLEN len)	301	need (enc_t *enc, STRLEN len)
156	{	302	{
157	if (expect_false (enc->cur + len >= enc->end))	303	if (expect_false (enc->cur + len >= enc->end))
158	{	304	{
159	STRLEN cur = enc->cur - SvPVX (enc->sv);	305	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
160	SvGROW (enc->sv, cur + len + 1);	306	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
161	enc->cur = SvPVX (enc->sv) + cur;	307	enc->cur = SvPVX (enc->sv) + cur;
162	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	308	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
163	}	309	}
164	}	310	}
165		311
…		…
227	clen = 1;	373	clen = 1;
228	}	374	}
229		375
230	if (uch < 0x80/0x20/ \|\| uch >= enc->limit)	376	if (uch < 0x80/0x20/ \|\| uch >= enc->limit)
231	{	377	{
232	if (uch > 0xFFFFUL)	378	if (uch >= 0x10000UL)
233	{	379	{
234	if (uch > 0x10FFFFUL)	380	if (uch >= 0x110000UL)
235	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);	381	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
236		382
237	need (enc, len += 11);	383	need (enc, len += 11);
238	sprintf (enc->cur, "\\u%04x\\u%04x",	384	sprintf (enc->cur, "\\u%04x\\u%04x",
239	(int)((uch - 0x10000) / 0x400 + 0xD800),	385	(int)((uch - 0x10000) / 0x400 + 0xD800),
240	(int)((uch - 0x10000) % 0x400 + 0xDC00));	386	(int)((uch - 0x10000) % 0x400 + 0xDC00));
241	enc->cur += 12;	387	enc->cur += 12;
242	}	388	}
243	else	389	else
244	{	390	{
245	static char hexdigit [16] = "0123456789abcdef";
246	need (enc, len += 5);	391	need (enc, len += 5);
247	*enc->cur++ = '\\';	392	*enc->cur++ = '\\';
248	*enc->cur++ = 'u';	393	*enc->cur++ = 'u';
249	*enc->cur++ = hexdigit [ uch >> 12 ];	394	*enc->cur++ = PL_hexdigit [ uch >> 12 ];
250	*enc->cur++ = hexdigit [(uch >> 8) & 15];	395	*enc->cur++ = PL_hexdigit [(uch >> 8) & 15];
251	*enc->cur++ = hexdigit [(uch >> 4) & 15];	396	*enc->cur++ = PL_hexdigit [(uch >> 4) & 15];
252	*enc->cur++ = hexdigit [(uch >> 0) & 15];	397	*enc->cur++ = PL_hexdigit [(uch >> 0) & 15];
253	}	398	}
254		399
255	str += clen;	400	str += clen;
256	}	401	}
257	else if (enc->json.flags & F_LATIN1)	402	else if (enc->json.flags & F_LATIN1)
…		…
328	static void	473	static void
329	encode_av (enc_t enc, AV av)	474	encode_av (enc_t enc, AV av)
330	{	475	{
331	int i, len = av_len (av);	476	int i, len = av_len (av);
332		477
333	if (enc->indent >= enc->maxdepth)	478	if (enc->indent >= enc->json.max_depth)
334	croak ("data structure too deep (hit recursion limit)");	479	croak (ERR_NESTING_EXCEEDED);
335		480
336	encode_ch (enc, '[');	481	encode_ch (enc, '[');
337		482
338	if (len >= 0)	483	if (len >= 0)
339	{	484	{
…		…
413		558
414	static void	559	static void
415	encode_hv (enc_t enc, HV hv)	560	encode_hv (enc_t enc, HV hv)
416	{	561	{
417	HE *he;	562	HE *he;
418	int count;
419		563
420	if (enc->indent >= enc->maxdepth)	564	if (enc->indent >= enc->json.max_depth)
421	croak ("data structure too deep (hit recursion limit)");	565	croak (ERR_NESTING_EXCEEDED);
422		566
423	encode_ch (enc, '{');	567	encode_ch (enc, '{');
424		568
425	// for canonical output we have to sort by keys first	569	// for canonical output we have to sort by keys first
426	// actually, this is mostly due to the stupid so-called	570	// actually, this is mostly due to the stupid so-called
427	// security workaround added somewhere in 5.8.x.	571	// security workaround added somewhere in 5.8.x
428	// that randomises hash orderings	572	// that randomises hash orderings
429	if (enc->json.flags & F_CANONICAL)	573	if (enc->json.flags & F_CANONICAL && !SvRMAGICAL (hv))
430	{	574	{
431	int count = hv_iterinit (hv);	575	int count = hv_iterinit (hv);
432		576
433	if (SvMAGICAL (hv))	577	if (SvMAGICAL (hv))
434	{	578	{
…		…
607		751
608	if (len == 1 && *pv == '1')	752	if (len == 1 && *pv == '1')
609	encode_str (enc, "true", 4, 0);	753	encode_str (enc, "true", 4, 0);
610	else if (len == 1 && *pv == '0')	754	else if (len == 1 && *pv == '0')
611	encode_str (enc, "false", 5, 0);	755	encode_str (enc, "false", 5, 0);
		756	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		757	encode_str (enc, "null", 4, 0);
612	else	758	else
613	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",	759	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
614	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	760	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
615	}	761	}
		762	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		763	encode_str (enc, "null", 4, 0);
616	else	764	else
617	croak ("encountered %s, but JSON can only represent references to arrays or hashes",	765	croak ("encountered %s, but JSON can only represent references to arrays or hashes",
618	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	766	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
619	}	767	}
620		768
…		…
638	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);	786	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
639	enc->cur += strlen (enc->cur);	787	enc->cur += strlen (enc->cur);
640	}	788	}
641	else if (SvIOKp (sv))	789	else if (SvIOKp (sv))
642	{	790	{
643	// we assume we can always read an IV as a UV	791	// we assume we can always read an IV as a UV and vice versa
644	if (SvUV (sv) & ~(UV)0x7fff)	792	// we assume two's complement
645	{	793	// we assume no aliasing issues in the union
646	// large integer, use the (rather slow) snprintf way.	794	if (SvIsUV (sv) ? SvUVX (sv) <= 59000
647	need (enc, sizeof (UV) * 3);	795	: SvIVX (sv) <= 59000 && SvIVX (sv) >= -59000)
648	enc->cur +=
649	SvIsUV(sv)
650	? snprintf (enc->cur, sizeof (UV) * 3, "%"UVuf, (UV)SvUVX (sv))
651	: snprintf (enc->cur, sizeof (UV) * 3, "%"IVdf, (IV)SvIVX (sv));
652	}
653	else
654	{	796	{
655	// optimise the "small number case"	797	// optimise the "small number case"
656	// code will likely be branchless and use only a single multiplication	798	// code will likely be branchless and use only a single multiplication
		799	// works for numbers up to 59074
657	I32 i = SvIV (sv);	800	I32 i = SvIVX (sv);
658	U32 u;	801	U32 u;
659	char digit, nz = 0;	802	char digit, nz = 0;
660		803
661	need (enc, 6);	804	need (enc, 6);
662		805
…		…
668		811
669	// now output digit by digit, each time masking out the integer part	812	// now output digit by digit, each time masking out the integer part
670	// and multiplying by 5 while moving the decimal point one to the right,	813	// and multiplying by 5 while moving the decimal point one to the right,
671	// resulting in a net multiplication by 10.	814	// resulting in a net multiplication by 10.
672	// we always write the digit to memory but conditionally increment	815	// we always write the digit to memory but conditionally increment
673	// the pointer, to ease the usage of conditional move instructions.	816	// the pointer, to enable the use of conditional move instructions.
674	digit = u >> 28; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0xfffffff) 5;	817	digit = u >> 28; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0xfffffffUL) 5;
675	digit = u >> 27; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x7ffffff) 5;	818	digit = u >> 27; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x7ffffffUL) 5;
676	digit = u >> 26; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x3ffffff) 5;	819	digit = u >> 26; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x3ffffffUL) 5;
677	digit = u >> 25; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x1ffffff) 5;	820	digit = u >> 25; enc->cur = digit + '0'; enc->cur += (nz = nz \|\| digit); u = (u & 0x1ffffffUL) 5;
678	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'	821	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
679	}	822	}
		823	else
		824	{
		825	// large integer, use the (rather slow) snprintf way.
		826	need (enc, IVUV_MAXCHARS);
		827	enc->cur +=
		828	SvIsUV(sv)
		829	? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv))
		830	: snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv));
		831	}
680	}	832	}
681	else if (SvROK (sv))	833	else if (SvROK (sv))
682	encode_rv (enc, SvRV (sv));	834	encode_rv (enc, SvRV (sv));
683	else if (!SvOK (sv))	835	else if (!SvOK (sv) \|\| enc->json.flags & F_ALLOW_UNKNOWN)
684	encode_str (enc, "null", 4, 0);	836	encode_str (enc, "null", 4, 0);
685	else	837	else
686	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",	838	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",
687	SvPV_nolen (sv), SvFLAGS (sv));	839	SvPV_nolen (sv), SvFLAGS (sv));
688	}	840	}
…		…
698	enc.json = *json;	850	enc.json = *json;
699	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	851	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
700	enc.cur = SvPVX (enc.sv);	852	enc.cur = SvPVX (enc.sv);
701	enc.end = SvEND (enc.sv);	853	enc.end = SvEND (enc.sv);
702	enc.indent = 0;	854	enc.indent = 0;
703	enc.maxdepth = DEC_DEPTH (enc.json.flags);
704	enc.limit = enc.json.flags & F_ASCII ? 0x000080UL	855	enc.limit = enc.json.flags & F_ASCII ? 0x000080UL
705	: enc.json.flags & F_LATIN1 ? 0x000100UL	856	: enc.json.flags & F_LATIN1 ? 0x000100UL
706	: 0x10FFFFUL;	857	: 0x110000UL;
707		858
708	SvPOK_only (enc.sv);	859	SvPOK_only (enc.sv);
709	encode_sv (&enc, scalar);	860	encode_sv (&enc, scalar);
		861	encode_nl (&enc);
710		862
711	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	863	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
712	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	864	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
713		865
714	if (!(enc.json.flags & (F_ASCII \| F_LATIN1 \| F_UTF8)))	866	if (!(enc.json.flags & (F_ASCII \| F_LATIN1 \| F_UTF8)))
…		…
775	if (*dec->cur != ch) \	927	if (*dec->cur != ch) \
776	ERR (# ch " expected"); \	928	ERR (# ch " expected"); \
777	++dec->cur; \	929	++dec->cur; \
778	SE	930	SE
779		931
780	#define DEC_INC_DEPTH if (++dec->depth > dec->maxdepth) ERR ("json datastructure exceeds maximum nesting level (set a higher max_depth)")	932	#define DEC_INC_DEPTH if (++dec->depth > dec->json.max_depth) ERR (ERR_NESTING_EXCEEDED)
781	#define DEC_DEC_DEPTH --dec->depth	933	#define DEC_DEC_DEPTH --dec->depth
782		934
783	static SV decode_sv (dec_t dec);	935	static SV decode_sv (dec_t dec);
784		936
785	static signed char decode_hexdigit[256];	937	static signed char decode_hexdigit[256];
…		…
889	default:	1041	default:
890	--dec_cur;	1042	--dec_cur;
891	ERR ("illegal backslash escape sequence in string");	1043	ERR ("illegal backslash escape sequence in string");
892	}	1044	}
893	}	1045	}
894	else if (expect_true (ch >= 0x20 && ch <= 0x7f))	1046	else if (expect_true (ch >= 0x20 && ch < 0x80))
895	*cur++ = ch;	1047	*cur++ = ch;
896	else if (ch >= 0x80)	1048	else if (ch >= 0x80)
897	{	1049	{
898	STRLEN clen;	1050	STRLEN clen;
899	UV uch;
900		1051
901	--dec_cur;	1052	--dec_cur;
902		1053
903	uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen);	1054	decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
904	if (clen == (STRLEN)-1)	1055	if (clen == (STRLEN)-1)
905	ERR ("malformed UTF-8 character in JSON string");	1056	ERR ("malformed UTF-8 character in JSON string");
906		1057
907	do	1058	do
908	cur++ = dec_cur++;	1059	cur++ = dec_cur++;
…		…
925	{	1076	{
926	STRLEN len = cur - buf;	1077	STRLEN len = cur - buf;
927		1078
928	if (sv)	1079	if (sv)
929	{	1080	{
930	SvGROW (sv, SvCUR (sv) + len + 1);	1081	STRLEN cur = SvCUR (sv);
		1082
		1083	if (SvLEN (sv) <= cur + len)
		1084	SvGROW (sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
		1085
931	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);	1086	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);
932	SvCUR_set (sv, SvCUR (sv) + len);	1087	SvCUR_set (sv, SvCUR (sv) + len);
933	}	1088	}
934	else	1089	else
935	sv = newSVpvn (buf, len);	1090	sv = newSVpvn (buf, len);
…		…
1026		1181
1027	// special case the rather common 1..5-digit-int case	1182	// special case the rather common 1..5-digit-int case
1028	if (*start == '-')	1183	if (*start == '-')
1029	switch (len)	1184	switch (len)
1030	{	1185	{
1031	case 2: return newSViv (-( start [1] - '0' * 1));	1186	case 2: return newSViv (-(IV)( start [1] - '0' * 1));
1032	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));	1187	case 3: return newSViv (-(IV)( start [1] * 10 + start [2] - '0' * 11));
1033	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));	1188	case 4: return newSViv (-(IV)( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
1034	case 5: return newSViv (-( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));	1189	case 5: return newSViv (-(IV)( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
1035	case 6: return newSViv (-(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));	1190	case 6: return newSViv (-(IV)(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));
1036	}	1191	}
1037	else	1192	else
1038	switch (len)	1193	switch (len)
1039	{	1194	{
1040	case 1: return newSViv ( start [0] - '0' * 1);	1195	case 1: return newSViv ( start [0] - '0' * 1);
1041	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);	1196	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
1042	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);	1197	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
1043	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);	1198	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
1044	case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);	1199	case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);
1045	}	1200	}
1046		1201
1047	{	1202	{
1048	UV uv;	1203	UV uv;
1049	int numtype = grok_number (start, len, &uv);	1204	int numtype = grok_number (start, len, &uv);
…		…
1058	}	1213	}
1059		1214
1060	len -= *start == '-' ? 1 : 0;	1215	len -= *start == '-' ? 1 : 0;
1061		1216
1062	// does not fit into IV or UV, try NV	1217	// does not fit into IV or UV, try NV
1063	if ((sizeof (NV) == sizeof (double) && DBL_DIG >= len)	1218	if (len <= NV_DIG)
1064	#if defined (LDBL_DIG)
1065	\|\| (sizeof (NV) == sizeof (long double) && LDBL_DIG >= len)
1066	#endif
1067	)
1068	// fits into NV without loss of precision	1219	// fits into NV without loss of precision
1069	return newSVnv (Atof (start));	1220	return newSVnv (json_atof (start));
1070		1221
1071	// everything else fails, convert it to a string	1222	// everything else fails, convert it to a string
1072	return newSVpvn (start, dec->cur - start);	1223	return newSVpvn (start, dec->cur - start);
1073	}	1224	}
1074		1225
1075	// loss of precision here	1226	// loss of precision here
1076	return newSVnv (Atof (start));	1227	return newSVnv (json_atof (start));
1077		1228
1078	fail:	1229	fail:
1079	return 0;	1230	return 0;
1080	}	1231	}
1081		1232
…		…
1157	char *p = dec->cur;	1308	char *p = dec->cur;
1158	char *e = p + 24; // only try up to 24 bytes	1309	char *e = p + 24; // only try up to 24 bytes
1159		1310
1160	for (;;)	1311	for (;;)
1161	{	1312	{
1162	// the >= 0x80 is true on most architectures	1313	// the >= 0x80 is false on most architectures
1163	if (p == e \|\| p < 0x20 \|\| p >= 0x80 \|\| *p == '\\')	1314	if (p == e \|\| p < 0x20 \|\| p >= 0x80 \|\| *p == '\\')
1164	{	1315	{
1165	// slow path, back up and use decode_str	1316	// slow path, back up and use decode_str
1166	SV *key = decode_str (dec);	1317	SV *key = decode_str (dec);
1167	if (!key)	1318	if (!key)
…		…
1250	dSP;	1401	dSP;
1251	int count;	1402	int count;
1252		1403
1253	ENTER; SAVETMPS; PUSHMARK (SP);	1404	ENTER; SAVETMPS; PUSHMARK (SP);
1254	XPUSHs (HeVAL (he));	1405	XPUSHs (HeVAL (he));
		1406	sv_2mortal (sv);
1255		1407
1256	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;	1408	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
1257		1409
1258	if (count == 1)	1410	if (count == 1)
1259	{	1411	{
1260	sv = newSVsv (POPs);	1412	sv = newSVsv (POPs);
1261	FREETMPS; LEAVE;	1413	FREETMPS; LEAVE;
1262	return sv;	1414	return sv;
1263	}	1415	}
1264		1416
		1417	SvREFCNT_inc (sv);
1265	FREETMPS; LEAVE;	1418	FREETMPS; LEAVE;
1266	}	1419	}
1267	}	1420	}
1268		1421
1269	if (dec->json.cb_object)	1422	if (dec->json.cb_object)
…		…
1298		1451
1299	static SV *	1452	static SV *
1300	decode_sv (dec_t *dec)	1453	decode_sv (dec_t *dec)
1301	{	1454	{
1302	// the beauty of JSON: you need exactly one character lookahead	1455	// the beauty of JSON: you need exactly one character lookahead
1303	// to parse anything.	1456	// to parse everything.
1304	switch (*dec->cur)	1457	switch (*dec->cur)
1305	{	1458	{
1306	case '"': ++dec->cur; return decode_str (dec);	1459	case '"': ++dec->cur; return decode_str (dec);
1307	case '[': ++dec->cur; return decode_av (dec);	1460	case '[': ++dec->cur; return decode_av (dec);
1308	case '{': ++dec->cur; return decode_hv (dec);	1461	case '{': ++dec->cur; return decode_hv (dec);
1309		1462
1310	case '-':	1463	case '-':
1311	case '0': case '1': case '2': case '3': case '4':	1464	case '0': case '1': case '2': case '3': case '4':
1312	case '5': case '6': case '7': case '8': case '9':	1465	case '5': case '6': case '7': case '8': case '9':
1313	return decode_num (dec);	1466	return decode_num (dec);
…		…
1315	case 't':	1468	case 't':
1316	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1469	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
1317	{	1470	{
1318	dec->cur += 4;	1471	dec->cur += 4;
1319	#if JSON_SLOW	1472	#if JSON_SLOW
1320	json_true = get_sv ("JSON::XS::true", 1); SvREADONLY_on (json_true);	1473	json_true = get_bool ("JSON::XS::true");
1321	#endif	1474	#endif
1322	return SvREFCNT_inc (json_true);	1475	return newSVsv (json_true);
1323	}	1476	}
1324	else	1477	else
1325	ERR ("'true' expected");	1478	ERR ("'true' expected");
1326		1479
1327	break;	1480	break;
…		…
1329	case 'f':	1482	case 'f':
1330	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))	1483	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
1331	{	1484	{
1332	dec->cur += 5;	1485	dec->cur += 5;
1333	#if JSON_SLOW	1486	#if JSON_SLOW
1334	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);	1487	json_false = get_bool ("JSON::XS::false");
1335	#endif	1488	#endif
1336	return SvREFCNT_inc (json_false);	1489	return newSVsv (json_false);
1337	}	1490	}
1338	else	1491	else
1339	ERR ("'false' expected");	1492	ERR ("'false' expected");
1340		1493
1341	break;	1494	break;
…		…
1359	fail:	1512	fail:
1360	return 0;	1513	return 0;
1361	}	1514	}
1362		1515
1363	static SV *	1516	static SV *
1364	decode_json (SV string, JSON json, UV *offset_return)	1517	decode_json (SV string, JSON json, char **offset_return)
1365	{	1518	{
1366	dec_t dec;	1519	dec_t dec;
1367	UV offset;
1368	SV *sv;	1520	SV *sv;
1369		1521
		1522	/* work around bugs in 5.10 where manipulating magic values
		1523	* will perl ignore the magic in subsequent accesses
		1524	*/
1370	SvGETMAGIC (string);	1525	/SvGETMAGIC (string);/
		1526	if (SvMAGICAL (string))
		1527	string = sv_2mortal (newSVsv (string));
		1528
1371	SvUPGRADE (string, SVt_PV);	1529	SvUPGRADE (string, SVt_PV);
1372		1530
1373	if (json->flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (json->flags))	1531	/* work around a bug in perl 5.10, which causes SvCUR to fail an
		1532	* assertion with -DDEBUGGING, although SvCUR is documented to
		1533	* return the xpv_cur field which certainly exists after upgrading.
		1534	* according to nicholas clark, calling SvPOK fixes this.
		1535	* But it doesn't fix it, so try another workaround, call SvPV_nolen
		1536	* and hope for the best.
		1537	* Damnit, SvPV_nolen still trips over yet another assertion. This
		1538	* assertion business is seriously broken, try yet another workaround
		1539	* for the broken -DDEBUGGING.
		1540	*/
		1541	{
		1542	#ifdef DEBUGGING
		1543	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
		1544	#else
		1545	STRLEN offset = SvCUR (string);
		1546	#endif
		1547
		1548	if (offset > json->max_size && json->max_size)
1374	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",	1549	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
1375	(unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (json->flags));	1550	(unsigned long)SvCUR (string), (unsigned long)json->max_size);
		1551	}
1376		1552
1377	if (json->flags & F_UTF8)	1553	if (json->flags & F_UTF8)
1378	sv_utf8_downgrade (string, 0);	1554	sv_utf8_downgrade (string, 0);
1379	else	1555	else
1380	sv_utf8_upgrade (string);	1556	sv_utf8_upgrade (string);
1381		1557
1382	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1558	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
1383		1559
1384	dec.json = *json;	1560	dec.json = *json;
1385	dec.cur = SvPVX (string);	1561	dec.cur = SvPVX (string);
1386	dec.end = SvEND (string);	1562	dec.end = SvEND (string);
1387	dec.err = 0;	1563	dec.err = 0;
1388	dec.depth = 0;	1564	dec.depth = 0;
1389	dec.maxdepth = DEC_DEPTH (dec.json.flags);
1390		1565
1391	if (dec.json.cb_object \|\| dec.json.cb_sk_object)	1566	if (dec.json.cb_object \|\| dec.json.cb_sk_object)
1392	dec.json.flags \|= F_HOOK;	1567	dec.json.flags \|= F_HOOK;
1393		1568
1394	*dec.end = 0; // this should basically be a nop, too, but make sure it's there	1569	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
1395		1570
1396	decode_ws (&dec);	1571	decode_ws (&dec);
1397	sv = decode_sv (&dec);	1572	sv = decode_sv (&dec);
		1573
		1574	if (offset_return)
		1575	*offset_return = dec.cur;
1398		1576
1399	if (!(offset_return \|\| !sv))	1577	if (!(offset_return \|\| !sv))
1400	{	1578	{
1401	// check for trailing garbage	1579	// check for trailing garbage
1402	decode_ws (&dec);	1580	decode_ws (&dec);
…		…
1405	{	1583	{
1406	dec.err = "garbage after JSON object";	1584	dec.err = "garbage after JSON object";
1407	SvREFCNT_dec (sv);	1585	SvREFCNT_dec (sv);
1408	sv = 0;	1586	sv = 0;
1409	}	1587	}
1410	}
1411
1412	if (offset_return \|\| !sv)
1413	{
1414	offset = dec.json.flags & F_UTF8
1415	? dec.cur - SvPVX (string)
1416	: utf8_distance (dec.cur, SvPVX (string));
1417
1418	if (offset_return)
1419	*offset_return = offset;
1420	}	1588	}
1421		1589
1422	if (!sv)	1590	if (!sv)
1423	{	1591	{
1424	SV *uni = sv_newmortal ();	1592	SV *uni = sv_newmortal ();
…		…
1430	SAVEVPTR (PL_curcop);	1598	SAVEVPTR (PL_curcop);
1431	PL_curcop = &cop;	1599	PL_curcop = &cop;
1432	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);	1600	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);
1433	LEAVE;	1601	LEAVE;
1434		1602
1435	croak ("%s, at character offset %d [\"%s\"]",	1603	croak ("%s, at character offset %d (before \"%s\")",
1436	dec.err,	1604	dec.err,
1437	(int)offset,	1605	ptr_to_index (string, dec.cur),
1438	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1606	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
1439	}	1607	}
1440		1608
1441	sv = sv_2mortal (sv);	1609	sv = sv_2mortal (sv);
1442		1610
1443	if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))	1611	if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))
1444	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");	1612	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
1445		1613
1446	return sv;	1614	return sv;
		1615	}
		1616
		1617	/////////////////////////////////////////////////////////////////////////////
		1618	// incremental parser
		1619
		1620	static void
		1621	incr_parse (JSON *self)
		1622	{
		1623	const char *p = SvPVX (self->incr_text) + self->incr_pos;
		1624
		1625	// the state machine here is a bit convoluted and could be simplified a lot
		1626	// but this would make it slower, so...
		1627
		1628	for (;;)
		1629	{
		1630	//printf ("loop pod %d p<%c><%s>, mode %d nest %d\n", p - SvPVX (self->incr_text), p, p, self->incr_mode, self->incr_nest);//D
		1631	switch (self->incr_mode)
		1632	{
		1633	// only used for initial whitespace skipping
		1634	case INCR_M_WS:
		1635	for (;;)
		1636	{
		1637	if (*p > 0x20)
		1638	{
		1639	if (*p == '#')
		1640	{
		1641	self->incr_mode = INCR_M_C0;
		1642	goto incr_m_c;
		1643	}
		1644	else
		1645	{
		1646	self->incr_mode = INCR_M_JSON;
		1647	goto incr_m_json;
		1648	}
		1649	}
		1650	else if (!*p)
		1651	goto interrupt;
		1652
		1653	++p;
		1654	}
		1655
		1656	// skip a single char inside a string (for \\-processing)
		1657	case INCR_M_BS:
		1658	if (!*p)
		1659	goto interrupt;
		1660
		1661	++p;
		1662	self->incr_mode = INCR_M_STR;
		1663	goto incr_m_str;
		1664
		1665	// inside #-style comments
		1666	case INCR_M_C0:
		1667	case INCR_M_C1:
		1668	incr_m_c:
		1669	for (;;)
		1670	{
		1671	if (*p == '\n')
		1672	{
		1673	self->incr_mode = self->incr_mode == INCR_M_C0 ? INCR_M_WS : INCR_M_JSON;
		1674	break;
		1675	}
		1676	else if (!*p)
		1677	goto interrupt;
		1678
		1679	++p;
		1680	}
		1681
		1682	break;
		1683
		1684	// inside a string
		1685	case INCR_M_STR:
		1686	incr_m_str:
		1687	for (;;)
		1688	{
		1689	if (*p == '"')
		1690	{
		1691	++p;
		1692	self->incr_mode = INCR_M_JSON;
		1693
		1694	if (!self->incr_nest)
		1695	goto interrupt;
		1696
		1697	goto incr_m_json;
		1698	}
		1699	else if (*p == '\\')
		1700	{
		1701	++p; // "virtually" consumes character after \
		1702
		1703	if (!*p) // if at end of string we have to switch modes
		1704	{
		1705	self->incr_mode = INCR_M_BS;
		1706	goto interrupt;
		1707	}
		1708	}
		1709	else if (!*p)
		1710	goto interrupt;
		1711
		1712	++p;
		1713	}
		1714
		1715	// after initial ws, outside string
		1716	case INCR_M_JSON:
		1717	incr_m_json:
		1718	for (;;)
		1719	{
		1720	switch (*p++)
		1721	{
		1722	case 0:
		1723	--p;
		1724	goto interrupt;
		1725
		1726	case 0x09:
		1727	case 0x0a:
		1728	case 0x0d:
		1729	case 0x20:
		1730	if (!self->incr_nest)
		1731	{
		1732	--p; // do not eat the whitespace, let the next round do it
		1733	goto interrupt;
		1734	}
		1735	break;
		1736
		1737	case '"':
		1738	self->incr_mode = INCR_M_STR;
		1739	goto incr_m_str;
		1740
		1741	case '[':
		1742	case '{':
		1743	if (++self->incr_nest > self->max_depth)
		1744	croak (ERR_NESTING_EXCEEDED);
		1745	break;
		1746
		1747	case ']':
		1748	case '}':
		1749	if (--self->incr_nest <= 0)
		1750	goto interrupt;
		1751	break;
		1752
		1753	case '#':
		1754	self->incr_mode = INCR_M_C1;
		1755	goto incr_m_c;
		1756	}
		1757	}
		1758	}
		1759
		1760	modechange:
		1761	;
		1762	}
		1763
		1764	interrupt:
		1765	self->incr_pos = p - SvPVX (self->incr_text);
		1766	//printf ("interrupt<%.*s>\n", self->incr_pos, SvPVX(self->incr_text));//D
		1767	//printf ("return pos %d mode %d nest %d\n", self->incr_pos, self->incr_mode, self->incr_nest);//D
1447	}	1768	}
1448		1769
1449	/////////////////////////////////////////////////////////////////////////////	1770	/////////////////////////////////////////////////////////////////////////////
1450	// XS interface functions	1771	// XS interface functions
1451		1772
…		…
1463	: -1;	1784	: -1;
1464		1785
1465	json_stash = gv_stashpv ("JSON::XS" , 1);	1786	json_stash = gv_stashpv ("JSON::XS" , 1);
1466	json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);	1787	json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);
1467		1788
1468	json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true );	1789	json_true = get_bool ("JSON::XS::true");
1469	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);	1790	json_false = get_bool ("JSON::XS::false");
		1791
		1792	CvNODEBUG_on (get_cv ("JSON::XS::incr_text", 0)); /* the debugger completely breaks lvalue subs */
1470	}	1793	}
1471		1794
1472	PROTOTYPES: DISABLE	1795	PROTOTYPES: DISABLE
1473		1796
1474	void CLONE (...)	1797	void CLONE (...)
…		…
1479	void new (char *klass)	1802	void new (char *klass)
1480	PPCODE:	1803	PPCODE:
1481	{	1804	{
1482	SV *pv = NEWSV (0, sizeof (JSON));	1805	SV *pv = NEWSV (0, sizeof (JSON));
1483	SvPOK_only (pv);	1806	SvPOK_only (pv);
1484	Zero (SvPVX (pv), 1, JSON);	1807	json_init ((JSON *)SvPVX (pv));
1485	((JSON *)SvPVX (pv))->flags = F_DEFAULT;
1486	XPUSHs (sv_2mortal (sv_bless (	1808	XPUSHs (sv_2mortal (sv_bless (
1487	newRV_noinc (pv),	1809	newRV_noinc (pv),
1488	strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)	1810	strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)
1489	)));	1811	)));
1490	}	1812	}
…		…
1502	allow_nonref = F_ALLOW_NONREF	1824	allow_nonref = F_ALLOW_NONREF
1503	shrink = F_SHRINK	1825	shrink = F_SHRINK
1504	allow_blessed = F_ALLOW_BLESSED	1826	allow_blessed = F_ALLOW_BLESSED
1505	convert_blessed = F_CONV_BLESSED	1827	convert_blessed = F_CONV_BLESSED
1506	relaxed = F_RELAXED	1828	relaxed = F_RELAXED
		1829	allow_unknown = F_ALLOW_UNKNOWN
1507	PPCODE:	1830	PPCODE:
1508	{	1831	{
1509	if (enable)	1832	if (enable)
1510	self->flags \|= ix;	1833	self->flags \|= ix;
1511	else	1834	else
…		…
1526	get_allow_nonref = F_ALLOW_NONREF	1849	get_allow_nonref = F_ALLOW_NONREF
1527	get_shrink = F_SHRINK	1850	get_shrink = F_SHRINK
1528	get_allow_blessed = F_ALLOW_BLESSED	1851	get_allow_blessed = F_ALLOW_BLESSED
1529	get_convert_blessed = F_CONV_BLESSED	1852	get_convert_blessed = F_CONV_BLESSED
1530	get_relaxed = F_RELAXED	1853	get_relaxed = F_RELAXED
		1854	get_allow_unknown = F_ALLOW_UNKNOWN
1531	PPCODE:	1855	PPCODE:
1532	XPUSHs (boolSV (self->flags & ix));	1856	XPUSHs (boolSV (self->flags & ix));
1533		1857
1534	void max_depth (JSON *self, UV max_depth = 0x80000000UL)	1858	void max_depth (JSON *self, U32 max_depth = 0x80000000UL)
1535	PPCODE:	1859	PPCODE:
1536	{	1860	self->max_depth = max_depth;
1537	UV log2 = 0;
1538
1539	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;
1540
1541	while ((1UL << log2) < max_depth)
1542	++log2;
1543
1544	self->flags = self->flags & ~F_MAXDEPTH \| (log2 << S_MAXDEPTH);
1545
1546	XPUSHs (ST (0));	1861	XPUSHs (ST (0));
1547	}
1548		1862
1549	U32 get_max_depth (JSON *self)	1863	U32 get_max_depth (JSON *self)
1550	CODE:	1864	CODE:
1551	RETVAL = DEC_DEPTH (self->flags);	1865	RETVAL = self->max_depth;
1552	OUTPUT:	1866	OUTPUT:
1553	RETVAL	1867	RETVAL
1554		1868
1555	void max_size (JSON *self, UV max_size = 0)	1869	void max_size (JSON *self, U32 max_size = 0)
1556	PPCODE:	1870	PPCODE:
1557	{	1871	self->max_size = max_size;
1558	UV log2 = 0;
1559
1560	if (max_size > 0x80000000UL) max_size = 0x80000000UL;
1561	if (max_size == 1) max_size = 2;
1562
1563	while ((1UL << log2) < max_size)
1564	++log2;
1565
1566	self->flags = self->flags & ~F_MAXSIZE \| (log2 << S_MAXSIZE);
1567
1568	XPUSHs (ST (0));	1872	XPUSHs (ST (0));
1569	}
1570		1873
1571	int get_max_size (JSON *self)	1874	int get_max_size (JSON *self)
1572	CODE:	1875	CODE:
1573	RETVAL = DEC_SIZE (self->flags);	1876	RETVAL = self->max_size;
1574	OUTPUT:	1877	OUTPUT:
1575	RETVAL	1878	RETVAL
1576		1879
1577	void filter_json_object (JSON self, SV cb = &PL_sv_undef)	1880	void filter_json_object (JSON self, SV cb = &PL_sv_undef)
1578	PPCODE:	1881	PPCODE:
…		…
1614	XPUSHs (decode_json (jsonstr, self, 0));	1917	XPUSHs (decode_json (jsonstr, self, 0));
1615		1918
1616	void decode_prefix (JSON self, SV jsonstr)	1919	void decode_prefix (JSON self, SV jsonstr)
1617	PPCODE:	1920	PPCODE:
1618	{	1921	{
1619	UV offset;	1922	char *offset;
1620	EXTEND (SP, 2);	1923	EXTEND (SP, 2);
1621	PUSHs (decode_json (jsonstr, self, &offset));	1924	PUSHs (decode_json (jsonstr, self, &offset));
1622	PUSHs (sv_2mortal (newSVuv (offset)));	1925	PUSHs (sv_2mortal (newSVuv (ptr_to_index (jsonstr, offset))));
		1926	}
		1927
		1928	void incr_parse (JSON self, SV jsonstr = 0)
		1929	PPCODE:
		1930	{
		1931	if (!self->incr_text)
		1932	self->incr_text = newSVpvn ("", 0);
		1933
		1934	// append data, if any
		1935	if (jsonstr)
		1936	{
		1937	if (SvUTF8 (jsonstr))
		1938	{
		1939	if (!SvUTF8 (self->incr_text))
		1940	{
		1941	/* utf-8-ness differs, need to upgrade */
		1942	sv_utf8_upgrade (self->incr_text);
		1943
		1944	if (self->incr_pos)
		1945	self->incr_pos = utf8_hop ((U8 *)SvPVX (self->incr_text), self->incr_pos)
		1946	- (U8 *)SvPVX (self->incr_text);
		1947	}
		1948	}
		1949	else if (SvUTF8 (self->incr_text))
		1950	sv_utf8_upgrade (jsonstr);
		1951
		1952	{
		1953	STRLEN len;
		1954	const char *str = SvPV (jsonstr, len);
		1955	STRLEN cur = SvCUR (self->incr_text);
		1956
		1957	if (SvLEN (self->incr_text) <= cur + len)
		1958	SvGROW (self->incr_text, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
		1959
		1960	Move (str, SvEND (self->incr_text), len, char);
		1961	SvCUR_set (self->incr_text, SvCUR (self->incr_text) + len);
		1962	*SvEND (self->incr_text) = 0; // this should basically be a nop, too, but make sure it's there
		1963	}
		1964	}
		1965
		1966	if (GIMME_V != G_VOID)
		1967	do
		1968	{
		1969	char *offset;
		1970
		1971	if (!INCR_DONE (self))
		1972	{
		1973	incr_parse (self);
		1974
		1975	if (self->incr_pos > self->max_size && self->max_size)
		1976	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		1977	(unsigned long)self->incr_pos, (unsigned long)self->max_size);
		1978
		1979	if (!INCR_DONE (self))
		1980	break;
		1981	}
		1982
		1983	XPUSHs (decode_json (self->incr_text, self, &offset));
		1984
		1985	self->incr_pos -= offset - SvPVX (self->incr_text);
		1986	self->incr_nest = 0;
		1987	self->incr_mode = 0;
		1988
		1989	sv_chop (self->incr_text, offset);
		1990	}
		1991	while (GIMME_V == G_ARRAY);
		1992	}
		1993
		1994	SV incr_text (JSON self)
		1995	ATTRS: lvalue
		1996	CODE:
		1997	{
		1998	if (self->incr_pos)
		1999	croak ("incr_text can not be called when the incremental parser already started parsing");
		2000
		2001	RETVAL = self->incr_text ? SvREFCNT_inc (self->incr_text) : &PL_sv_undef;
		2002	}
		2003	OUTPUT:
		2004	RETVAL
		2005
		2006	void incr_skip (JSON *self)
		2007	CODE:
		2008	{
		2009	if (self->incr_pos)
		2010	{
		2011	sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + self->incr_pos);
		2012	self->incr_pos = 0;
		2013	self->incr_nest = 0;
		2014	self->incr_mode = 0;
		2015	}
		2016	}
		2017
		2018	void incr_reset (JSON *self)
		2019	CODE:
		2020	{
		2021	SvREFCNT_dec (self->incr_text);
		2022	self->incr_text = 0;
		2023	self->incr_pos = 0;
		2024	self->incr_nest = 0;
		2025	self->incr_mode = 0;
1623	}	2026	}
1624		2027
1625	void DESTROY (JSON *self)	2028	void DESTROY (JSON *self)
1626	CODE:	2029	CODE:
1627	SvREFCNT_dec (self->cb_sk_object);	2030	SvREFCNT_dec (self->cb_sk_object);
1628	SvREFCNT_dec (self->cb_object);	2031	SvREFCNT_dec (self->cb_object);
		2032	SvREFCNT_dec (self->incr_text);
1629		2033
1630	PROTOTYPES: ENABLE	2034	PROTOTYPES: ENABLE
1631		2035
1632	void encode_json (SV *scalar)	2036	void encode_json (SV *scalar)
		2037	ALIAS:
		2038	to_json_ = 0
		2039	encode_json = F_UTF8
1633	PPCODE:	2040	PPCODE:
1634	{	2041	{
1635	JSON json = { F_DEFAULT \| F_UTF8 };	2042	JSON json;
		2043	json_init (&json);
		2044	json.flags \|= ix;
1636	XPUSHs (encode_json (scalar, &json));	2045	XPUSHs (encode_json (scalar, &json));
1637	}	2046	}
1638		2047
1639	void decode_json (SV *jsonstr)	2048	void decode_json (SV *jsonstr)
		2049	ALIAS:
		2050	from_json_ = 0
		2051	decode_json = F_UTF8
1640	PPCODE:	2052	PPCODE:
1641	{	2053	{
1642	JSON json = { F_DEFAULT \| F_UTF8 };	2054	JSON json;
		2055	json_init (&json);
		2056	json.flags \|= ix;
1643	XPUSHs (decode_json (jsonstr, &json, 0));	2057	XPUSHs (decode_json (jsonstr, &json, 0));
1644	}	2058	}
1645		2059

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing JSON-XS/XS.xs (file contents): Revision 1.72 by root, Wed Mar 19 04:08:22 2008 UTC vs. Revision 1.107 by root, Wed Mar 17 01:45:43 2010 UTC

Diff Legend

Comparing JSON-XS/XS.xs (file contents):
Revision 1.72 by root, Wed Mar 19 04:08:22 2008 UTC vs.
Revision 1.107 by root, Wed Mar 17 01:45:43 2010 UTC