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

Comparing JSON-XS/XS.xs (file contents):
Revision 1.75 by root, Wed Mar 19 15:37:54 2008 UTC vs.
Revision 1.133 by root, Tue Aug 28 16:16:17 2018 UTC

…		…
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 <limits.h>
10	#include <float.h>	10	#include <float.h>
		11	#include <inttypes.h>
11		12
12	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)	13	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)
13	# define snprintf _snprintf // C compilers have this in stdio.h	14	# define snprintf _snprintf // C compilers have this in stdio.h
14	#endif	15	#endif
15		16
16	// some old perls do not have this, try to make it work, no	17	// some old perls do not have this, try to make it work, no
17	// guarentees, though. if it breaks, you get to keep the pieces.	18	// guarantees, though. if it breaks, you get to keep the pieces.
18	#ifndef UTF8_MAXBYTES	19	#ifndef UTF8_MAXBYTES
19	# define UTF8_MAXBYTES 13	20	# define UTF8_MAXBYTES 13
20	#endif	21	#endif
21		22
		23	// compatibility with perl <5.18
		24	#ifndef HvNAMELEN_get
		25	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		26	#endif
		27	#ifndef HvNAMELEN
		28	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		29	#endif
		30	#ifndef HvNAMEUTF8
		31	# define HvNAMEUTF8(hv) 0
		32	#endif
		33
		34	// three extra for rounding, sign, and end of string
22	#define IVUV_MAXCHARS (sizeof (UV) * CHAR_BIT * 28 / 93 + 2)	35	#define IVUV_MAXCHARS (sizeof (UV) * CHAR_BIT * 28 / 93 + 3)
23		36
24	#define F_ASCII 0x00000001UL	37	#define F_ASCII 0x00000001UL
25	#define F_LATIN1 0x00000002UL	38	#define F_LATIN1 0x00000002UL
26	#define F_UTF8 0x00000004UL	39	#define F_UTF8 0x00000004UL
27	#define F_INDENT 0x00000008UL	40	#define F_INDENT 0x00000008UL
…		…
31	#define F_ALLOW_NONREF 0x00000100UL	44	#define F_ALLOW_NONREF 0x00000100UL
32	#define F_SHRINK 0x00000200UL	45	#define F_SHRINK 0x00000200UL
33	#define F_ALLOW_BLESSED 0x00000400UL	46	#define F_ALLOW_BLESSED 0x00000400UL
34	#define F_CONV_BLESSED 0x00000800UL	47	#define F_CONV_BLESSED 0x00000800UL
35	#define F_RELAXED 0x00001000UL	48	#define F_RELAXED 0x00001000UL
36		49	#define F_ALLOW_UNKNOWN 0x00002000UL
37	#define F_MAXDEPTH 0xf8000000UL	50	#define F_ALLOW_TAGS 0x00004000UL
38	#define S_MAXDEPTH 27
39	#define F_MAXSIZE 0x01f00000UL
40	#define S_MAXSIZE 20
41	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing	51	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
42		52
43	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
44	#define DEC_SIZE(flags) (1UL << ((flags & F_MAXSIZE ) >> S_MAXSIZE ))
45
46	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER	53	#define F_PRETTY F_INDENT \| F_SPACE_BEFORE \| F_SPACE_AFTER
47	#define F_DEFAULT (9UL << S_MAXDEPTH)
48		54
49	#define INIT_SIZE 32 // initial scalar size to be allocated	55	#define INIT_SIZE 32 // initial scalar size to be allocated
50	#define INDENT_STEP 3 // spaces per indentation level	56	#define INDENT_STEP 3 // spaces per indentation level
51		57
52	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size	58	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size
		59
		60	#define DECODE_WANTS_OCTETS(json) ((json)->flags & F_UTF8)
53		61
54	#define SB do {	62	#define SB do {
55	#define SE } while (0)	63	#define SE } while (0)
56		64
57	#if __GNUC__ >= 3	65	#if __GNUC__ >= 3
…		…
67		75
68	#define IN_RANGE_INC(type,val,beg,end) \	76	#define IN_RANGE_INC(type,val,beg,end) \
69	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \	77	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
70	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))	78	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
71		79
		80	#define ERR_NESTING_EXCEEDED "json text or perl structure exceeds maximum nesting level (max_depth set too low?)"
		81
72	#ifdef USE_ITHREADS	82	#ifdef USE_ITHREADS
73	# define JSON_SLOW 1
74	# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1))	83	# define JSON_STASH (expect_true (json_stash) ? json_stash : gv_stashpv ("JSON::XS", 1))
		84	# define BOOL_STASH (expect_true (bool_stash) ? bool_stash : gv_stashpv ("Types::Serialiser::Boolean", 1))
		85	# define GET_BOOL(value) (expect_true (bool_ ## value) ? bool_ ## value : get_bool ("Types::Serialiser::" # value))
75	#else	86	#else
76	# define JSON_SLOW 0
77	# define JSON_STASH json_stash	87	# define JSON_STASH json_stash
		88	# define BOOL_STASH bool_stash
		89	# define GET_BOOL(value) bool_ ## value
78	#endif	90	#endif
79		91
80	static HV json_stash, json_boolean_stash; // JSON::XS::	92	// the amount of HEs to allocate on the stack, when sorting keys
81	static SV json_true, json_false;	93	#define STACK_HES 64
		94
		95	static HV json_stash, bool_stash; // JSON::XS::, Types::Serialiser::Boolean::
		96	static SV bool_false, bool_true;
		97	static SV *sv_json;
		98
		99	enum {
		100	INCR_M_WS = 0, // initial whitespace skipping, must be 0
		101	INCR_M_STR, // inside string
		102	INCR_M_BS, // inside backslash
		103	INCR_M_C0, // inside comment in initial whitespace sequence
		104	INCR_M_C1, // inside comment in other places
		105	INCR_M_JSON // outside anything, count nesting
		106	};
		107
		108	#define INCR_DONE(json) ((json)->incr_nest <= 0 && (json)->incr_mode == INCR_M_JSON)
82		109
83	typedef struct {	110	typedef struct {
84	U32 flags;	111	U32 flags;
		112	U32 max_depth;
		113	STRLEN max_size;
		114
85	SV *cb_object;	115	SV *cb_object;
86	HV *cb_sk_object;	116	HV *cb_sk_object;
		117
		118	// for the incremental parser
		119	SV *incr_text; // the source text so far
		120	STRLEN incr_pos; // the current offset into the text
		121	int incr_nest; // {[]}-nesting level
		122	unsigned char incr_mode;
		123
		124	SV v_false, v_true;
87	} JSON;	125	} JSON;
		126
		127	INLINE void
		128	json_init (JSON *json)
		129	{
		130	Zero (json, 1, JSON);
		131	json->max_depth = 512;
		132	}
88		133
89	/////////////////////////////////////////////////////////////////////////////	134	/////////////////////////////////////////////////////////////////////////////
90	// utility functions	135	// utility functions
91		136
		137	INLINE SV *
		138	get_bool (const char *name)
		139	{
		140	SV *sv = get_sv (name, 1);
		141
		142	SvREADONLY_on (sv);
		143	SvREADONLY_on (SvRV (sv));
		144
		145	return sv;
		146	}
		147
92	INLINE void	148	INLINE void
93	shrink (SV *sv)	149	shrink (SV *sv)
94	{	150	{
95	sv_utf8_downgrade (sv, 1);	151	sv_utf8_downgrade (sv, 1);
		152
96	if (SvLEN (sv) > SvCUR (sv) + 1)	153	if (SvLEN (sv) > SvCUR (sv) + 1)
97	{	154	{
98	#ifdef SvPV_shrink_to_cur	155	#ifdef SvPV_shrink_to_cur
99	SvPV_shrink_to_cur (sv);	156	SvPV_shrink_to_cur (sv);
100	#elif defined (SvPV_renew)	157	#elif defined (SvPV_renew)
101	SvPV_renew (sv, SvCUR (sv) + 1);	158	SvPV_renew (sv, SvCUR (sv) + 1);
102	#endif	159	#endif
103	}	160	}
104	}	161	}
105		162
		163	/* adds two STRLENs together, slow, and with paranoia */
		164	STRLEN
		165	strlen_sum (STRLEN l1, STRLEN l2)
		166	{
		167	size_t sum = l1 + l2;
		168
		169	if (sum < (size_t)l2 \|\| sum != (size_t)(STRLEN)sum)
		170	croak ("JSON::XS: string size overflow");
		171
		172	return sum;
		173	}
		174
		175	/* similar to SvGROW, but somewhat safer and guarantees exponential realloc strategy */
		176	static char *
		177	json_sv_grow (SV *sv, size_t len1, size_t len2)
		178	{
		179	len1 = strlen_sum (len1, len2);
		180	len1 = strlen_sum (len1, len1 >> 1);
		181
		182	if (len1 > 4096 - 24)
		183	len1 = (len1 \| 4095) - 24;
		184
		185	return SvGROW (sv, len1);
		186	}
		187
106	// decode an utf-8 character and return it, or (UV)-1 in	188	// decode a utf-8 character and return it, or (UV)-1 in
107	// case of an error.	189	// case of an error.
108	// we special-case "safe" characters from U+80 .. U+7FF,	190	// we special-case "safe" characters from U+80 .. U+7FF,
109	// but use the very good perl function to parse anything else.	191	// but use the very good perl function to parse anything else.
110	// note that we never call this function for a ascii codepoints	192	// note that we never call this function for a ascii codepoints
111	INLINE UV	193	INLINE UV
…		…
144	*s++ = 0x80 \| ( ch & 0x3f);	226	*s++ = 0x80 \| ( ch & 0x3f);
145		227
146	return s;	228	return s;
147	}	229	}
148		230
		231	// convert offset pointer to character index, sv must be string
		232	static STRLEN
		233	ptr_to_index (SV sv, char offset)
		234	{
		235	return SvUTF8 (sv)
		236	? utf8_distance (offset, SvPVX (sv))
		237	: offset - SvPVX (sv);
		238	}
		239
		240	/////////////////////////////////////////////////////////////////////////////
		241	// fp hell
		242
		243	// scan a group of digits, and a trailing exponent
		244	static void
		245	json_atof_scan1 (const char s, NV accum, int *expo, int postdp, int maxdepth)
		246	{
		247	UV uaccum = 0;
		248	int eaccum = 0;
		249
		250	// if we recurse too deep, skip all remaining digits
		251	// to avoid a stack overflow attack
		252	if (expect_false (--maxdepth <= 0))
		253	while (((U8)*s - '0') < 10)
		254	++s;
		255
		256	for (;;)
		257	{
		258	U8 dig = (U8)*s - '0';
		259
		260	if (expect_false (dig >= 10))
		261	{
		262	if (dig == (U8)((U8)'.' - (U8)'0'))
		263	{
		264	++s;
		265	json_atof_scan1 (s, accum, expo, 1, maxdepth);
		266	}
		267	else if ((dig \| ' ') == 'e' - '0')
		268	{
		269	int exp2 = 0;
		270	int neg = 0;
		271
		272	++s;
		273
		274	if (*s == '-')
		275	{
		276	++s;
		277	neg = 1;
		278	}
		279	else if (*s == '+')
		280	++s;
		281
		282	while ((dig = (U8)*s - '0') < 10)
		283	exp2 = exp2 * 10 + *s++ - '0';
		284
		285	*expo += neg ? -exp2 : exp2;
		286	}
		287
		288	break;
		289	}
		290
		291	++s;
		292
		293	uaccum = uaccum * 10 + dig;
		294	++eaccum;
		295
		296	// if we have too many digits, then recurse for more
		297	// we actually do this for rather few digits
		298	if (uaccum >= (UV_MAX - 9) / 10)
		299	{
		300	if (postdp) *expo -= eaccum;
		301	json_atof_scan1 (s, accum, expo, postdp, maxdepth);
		302	if (postdp) *expo += eaccum;
		303
		304	break;
		305	}
		306	}
		307
		308	// this relies greatly on the quality of the pow ()
		309	// implementation of the platform, but a good
		310	// implementation is hard to beat.
		311	// (IEEE 754 conformant ones are required to be exact)
		312	if (postdp) *expo -= eaccum;
		313	accum += uaccum Perl_pow (10., *expo);
		314	*expo += eaccum;
		315	}
		316
		317	static NV
		318	json_atof (const char *s)
		319	{
		320	NV accum = 0.;
		321	int expo = 0;
		322	int neg = 0;
		323
		324	if (*s == '-')
		325	{
		326	++s;
		327	neg = 1;
		328	}
		329
		330	// a recursion depth of ten gives us >>500 bits
		331	json_atof_scan1 (s, &accum, &expo, 0, 10);
		332
		333	return neg ? -accum : accum;
		334	}
		335
		336	// target of scalar reference is bool? -1 == nope, 0 == false, 1 == true
		337	static int
		338	ref_bool_type (SV *sv)
		339	{
		340	svtype svt = SvTYPE (sv);
		341
		342	if (svt < SVt_PVAV)
		343	{
		344	STRLEN len = 0;
		345	char *pv = svt ? SvPV (sv, len) : 0;
		346
		347	if (len == 1)
		348	if (*pv == '1')
		349	return 1;
		350	else if (*pv == '0')
		351	return 0;
		352	}
		353
		354	return -1;
		355	}
		356
		357	// returns whether scalar is not a reference in the sense of allow_nonref
		358	static int
		359	json_nonref (SV *scalar)
		360	{
		361	if (!SvROK (scalar))
		362	return 1;
		363
		364	scalar = SvRV (scalar);
		365
		366	if (SvTYPE (scalar) >= SVt_PVMG)
		367	{
		368	if (SvSTASH (scalar) == bool_stash)
		369	return 1;
		370
		371	if (!SvOBJECT (scalar) && ref_bool_type (scalar) >= 0)
		372	return 1;
		373	}
		374
		375	return 0;
		376	}
		377
149	/////////////////////////////////////////////////////////////////////////////	378	/////////////////////////////////////////////////////////////////////////////
150	// encoder	379	// encoder
151		380
152	// structure used for encoding JSON	381	// structure used for encoding JSON
153	typedef struct	382	typedef struct
…		…
155	char *cur; // SvPVX (sv) + current output position	384	char *cur; // SvPVX (sv) + current output position
156	char *end; // SvEND (sv)	385	char *end; // SvEND (sv)
157	SV *sv; // result scalar	386	SV *sv; // result scalar
158	JSON json;	387	JSON json;
159	U32 indent; // indentation level	388	U32 indent; // indentation level
160	U32 maxdepth; // max. indentation/recursion level
161	UV limit; // escape character values >= this value when encoding	389	UV limit; // escape character values >= this value when encoding
162	} enc_t;	390	} enc_t;
163		391
164	INLINE void	392	INLINE void
165	need (enc_t *enc, STRLEN len)	393	need (enc_t *enc, STRLEN len)
166	{	394	{
167	if (expect_false (enc->cur + len >= enc->end))	395	if (expect_false ((uintptr_t)(enc->end - enc->cur) < len))
168	{	396	{
169	STRLEN cur = enc->cur - SvPVX (enc->sv);	397	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
170	SvGROW (enc->sv, cur + len + 1);	398	char *buf = json_sv_grow (enc->sv, cur, len);
171	enc->cur = SvPVX (enc->sv) + cur;	399	enc->cur = buf + cur;
172	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	400	enc->end = buf + SvLEN (enc->sv) - 1;
173	}	401	}
174	}	402	}
175		403
176	INLINE void	404	INLINE void
177	encode_ch (enc_t *enc, char ch)	405	encode_ch (enc_t *enc, char ch)
…		…
193		421
194	if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case	422	if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case
195	{	423	{
196	if (expect_false (ch == '"')) // but with slow exceptions	424	if (expect_false (ch == '"')) // but with slow exceptions
197	{	425	{
198	need (enc, len += 1);	426	need (enc, len + 1);
199	*enc->cur++ = '\\';	427	*enc->cur++ = '\\';
200	*enc->cur++ = '"';	428	*enc->cur++ = '"';
201	}	429	}
202	else if (expect_false (ch == '\\'))	430	else if (expect_false (ch == '\\'))
203	{	431	{
204	need (enc, len += 1);	432	need (enc, len + 1);
205	*enc->cur++ = '\\';	433	*enc->cur++ = '\\';
206	*enc->cur++ = '\\';	434	*enc->cur++ = '\\';
207	}	435	}
208	else	436	else
209	*enc->cur++ = ch;	437	*enc->cur++ = ch;
…		…
212	}	440	}
213	else	441	else
214	{	442	{
215	switch (ch)	443	switch (ch)
216	{	444	{
217	case '\010': need (enc, len += 1); enc->cur++ = '\\'; enc->cur++ = 'b'; ++str; break;	445	case '\010': need (enc, len + 1); enc->cur++ = '\\'; enc->cur++ = 'b'; ++str; break;
218	case '\011': need (enc, len += 1); enc->cur++ = '\\'; enc->cur++ = 't'; ++str; break;	446	case '\011': need (enc, len + 1); enc->cur++ = '\\'; enc->cur++ = 't'; ++str; break;
219	case '\012': need (enc, len += 1); enc->cur++ = '\\'; enc->cur++ = 'n'; ++str; break;	447	case '\012': need (enc, len + 1); enc->cur++ = '\\'; enc->cur++ = 'n'; ++str; break;
220	case '\014': need (enc, len += 1); enc->cur++ = '\\'; enc->cur++ = 'f'; ++str; break;	448	case '\014': need (enc, len + 1); enc->cur++ = '\\'; enc->cur++ = 'f'; ++str; break;
221	case '\015': need (enc, len += 1); enc->cur++ = '\\'; enc->cur++ = 'r'; ++str; break;	449	case '\015': need (enc, len + 1); enc->cur++ = '\\'; enc->cur++ = 'r'; ++str; break;
222		450
223	default:	451	default:
224	{	452	{
225	STRLEN clen;	453	STRLEN clen;
226	UV uch;	454	UV uch;
…		…
242	if (uch >= 0x10000UL)	470	if (uch >= 0x10000UL)
243	{	471	{
244	if (uch >= 0x110000UL)	472	if (uch >= 0x110000UL)
245	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);	473	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
246		474
247	need (enc, len += 11);	475	need (enc, len + 11);
248	sprintf (enc->cur, "\\u%04x\\u%04x",	476	sprintf (enc->cur, "\\u%04x\\u%04x",
249	(int)((uch - 0x10000) / 0x400 + 0xD800),	477	(int)((uch - 0x10000) / 0x400 + 0xD800),
250	(int)((uch - 0x10000) % 0x400 + 0xDC00));	478	(int)((uch - 0x10000) % 0x400 + 0xDC00));
251	enc->cur += 12;	479	enc->cur += 12;
252	}	480	}
253	else	481	else
254	{	482	{
255	static char hexdigit [16] = "0123456789abcdef";
256	need (enc, len += 5);	483	need (enc, len + 5);
257	*enc->cur++ = '\\';	484	*enc->cur++ = '\\';
258	*enc->cur++ = 'u';	485	*enc->cur++ = 'u';
259	*enc->cur++ = hexdigit [ uch >> 12 ];	486	*enc->cur++ = PL_hexdigit [ uch >> 12 ];
260	*enc->cur++ = hexdigit [(uch >> 8) & 15];	487	*enc->cur++ = PL_hexdigit [(uch >> 8) & 15];
261	*enc->cur++ = hexdigit [(uch >> 4) & 15];	488	*enc->cur++ = PL_hexdigit [(uch >> 4) & 15];
262	*enc->cur++ = hexdigit [(uch >> 0) & 15];	489	*enc->cur++ = PL_hexdigit [(uch >> 0) & 15];
263	}	490	}
264		491
265	str += clen;	492	str += clen;
266	}	493	}
267	else if (enc->json.flags & F_LATIN1)	494	else if (enc->json.flags & F_LATIN1)
…		…
269	*enc->cur++ = uch;	496	*enc->cur++ = uch;
270	str += clen;	497	str += clen;
271	}	498	}
272	else if (is_utf8)	499	else if (is_utf8)
273	{	500	{
274	need (enc, len += clen);	501	need (enc, len + clen);
275	do	502	do
276	{	503	{
277	enc->cur++ = str++;	504	enc->cur++ = str++;
278	}	505	}
279	while (--clen);	506	while (--clen);
280	}	507	}
281	else	508	else
282	{	509	{
283	need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed	510	need (enc, len + UTF8_MAXBYTES - 1); // never more than 11 bytes needed
284	enc->cur = encode_utf8 (enc->cur, uch);	511	enc->cur = encode_utf8 (enc->cur, uch);
285	++str;	512	++str;
286	}	513	}
287	}	514	}
288	}	515	}
…		…
338	static void	565	static void
339	encode_av (enc_t enc, AV av)	566	encode_av (enc_t enc, AV av)
340	{	567	{
341	int i, len = av_len (av);	568	int i, len = av_len (av);
342		569
343	if (enc->indent >= enc->maxdepth)	570	if (enc->indent >= enc->json.max_depth)
344	croak ("data structure too deep (hit recursion limit)");	571	croak (ERR_NESTING_EXCEEDED);
345		572
346	encode_ch (enc, '[');	573	encode_ch (enc, '[');
347		574
348	if (len >= 0)	575	if (len >= 0)
349	{	576	{
350	encode_nl (enc); ++enc->indent;	577	encode_nl (enc); ++enc->indent;
351		578
352	for (i = 0; i <= len; ++i)	579	for (i = 0; i <= len; ++i)
…		…
364	encode_comma (enc);	591	encode_comma (enc);
365	}	592	}
366		593
367	encode_nl (enc); --enc->indent; encode_indent (enc);	594	encode_nl (enc); --enc->indent; encode_indent (enc);
368	}	595	}
369		596
370	encode_ch (enc, ']');	597	encode_ch (enc, ']');
371	}	598	}
372		599
373	static void	600	static void
374	encode_hk (enc_t enc, HE he)	601	encode_hk (enc_t enc, HE he)
…		…
378	if (HeKLEN (he) == HEf_SVKEY)	605	if (HeKLEN (he) == HEf_SVKEY)
379	{	606	{
380	SV *sv = HeSVKEY (he);	607	SV *sv = HeSVKEY (he);
381	STRLEN len;	608	STRLEN len;
382	char *str;	609	char *str;
383		610
384	SvGETMAGIC (sv);	611	SvGETMAGIC (sv);
385	str = SvPV (sv, len);	612	str = SvPV (sv, len);
386		613
387	encode_str (enc, str, len, SvUTF8 (sv));	614	encode_str (enc, str, len, SvUTF8 (sv));
388	}	615	}
…		…
423		650
424	static void	651	static void
425	encode_hv (enc_t enc, HV hv)	652	encode_hv (enc_t enc, HV hv)
426	{	653	{
427	HE *he;	654	HE *he;
428	int count;
429		655
430	if (enc->indent >= enc->maxdepth)	656	if (enc->indent >= enc->json.max_depth)
431	croak ("data structure too deep (hit recursion limit)");	657	croak (ERR_NESTING_EXCEEDED);
432		658
433	encode_ch (enc, '{');	659	encode_ch (enc, '{');
434		660
435	// for canonical output we have to sort by keys first	661	// for canonical output we have to sort by keys first
436	// actually, this is mostly due to the stupid so-called	662	// actually, this is mostly due to the stupid so-called
437	// security workaround added somewhere in 5.8.x.	663	// security workaround added somewhere in 5.8.x
438	// that randomises hash orderings	664	// that randomises hash orderings
439	if (enc->json.flags & F_CANONICAL)	665	if (enc->json.flags & F_CANONICAL && !SvRMAGICAL (hv))
440	{	666	{
441	int count = hv_iterinit (hv);	667	int count = hv_iterinit (hv);
442		668
443	if (SvMAGICAL (hv))	669	if (SvMAGICAL (hv))
444	{	670	{
…		…
455	}	681	}
456		682
457	if (count)	683	if (count)
458	{	684	{
459	int i, fast = 1;	685	int i, fast = 1;
460	#if defined(__BORLANDC__) \|\| defined(_MSC_VER)	686	HE *hes_stack [STACK_HES];
461	HE *hes = _alloca (count sizeof (HE));	687	HE **hes = hes_stack;
462	#else	688
463	HE *hes [count]; // if your compiler dies here, you need to enable C99 mode	689	// allocate larger arrays on the heap
464	#endif	690	if (count > STACK_HES)
		691	{
		692	SV sv = sv_2mortal (NEWSV (0, count sizeof (*hes)));
		693	hes = (HE **)SvPVX (sv);
		694	}
465		695
466	i = 0;	696	i = 0;
467	while ((he = hv_iternext (hv)))	697	while ((he = hv_iternext (hv)))
468	{	698	{
469	hes [i++] = he;	699	hes [i++] = he;
…		…
538	// encode objects, arrays and special \0=false and \1=true values.	768	// encode objects, arrays and special \0=false and \1=true values.
539	static void	769	static void
540	encode_rv (enc_t enc, SV sv)	770	encode_rv (enc_t enc, SV sv)
541	{	771	{
542	svtype svt;	772	svtype svt;
		773	GV *method;
543		774
544	SvGETMAGIC (sv);	775	SvGETMAGIC (sv);
545	svt = SvTYPE (sv);	776	svt = SvTYPE (sv);
546		777
547	if (expect_false (SvOBJECT (sv)))	778	if (expect_false (SvOBJECT (sv)))
548	{	779	{
549	HV *stash = !JSON_SLOW \|\| json_boolean_stash	780	HV *stash = SvSTASH (sv);
550	? json_boolean_stash
551	: gv_stashpv ("JSON::XS::Boolean", 1);
552		781
553	if (SvSTASH (sv) == stash)	782	if (stash == bool_stash)
554	{	783	{
555	if (SvIV (sv))
556	encode_str (enc, "true", 4, 0);	784	if (SvIV (sv)) encode_str (enc, "true" , 4, 0);
557	else
558	encode_str (enc, "false", 5, 0);	785	else encode_str (enc, "false", 5, 0);
559	}	786	}
		787	else if ((enc->json.flags & F_ALLOW_TAGS) && (method = gv_fetchmethod_autoload (stash, "FREEZE", 0)))
		788	{
		789	int count;
		790	dSP;
		791
		792	ENTER; SAVETMPS;
		793	SAVESTACK_POS ();
		794	PUSHMARK (SP);
		795	EXTEND (SP, 2);
		796	// we re-bless the reference to get overload and other niceties right
		797	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		798	PUSHs (sv_json);
		799
		800	PUTBACK;
		801	count = call_sv ((SV *)GvCV (method), G_ARRAY);
		802	SPAGAIN;
		803
		804	// catch this surprisingly common error
		805	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		806	croak ("%s::FREEZE method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		807
		808	encode_ch (enc, '(');
		809	encode_ch (enc, '"');
		810	encode_str (enc, HvNAME (stash), HvNAMELEN (stash), HvNAMEUTF8 (stash));
		811	encode_ch (enc, '"');
		812	encode_ch (enc, ')');
		813	encode_ch (enc, '[');
		814
		815	while (count)
		816	{
		817	encode_sv (enc, SP[1 - count--]);
		818
		819	if (count)
		820	encode_ch (enc, ',');
		821	}
		822
		823	encode_ch (enc, ']');
		824
		825	FREETMPS; LEAVE;
		826	}
		827	else if ((enc->json.flags & F_CONV_BLESSED) && (method = gv_fetchmethod_autoload (stash, "TO_JSON", 0)))
		828	{
		829	dSP;
		830
		831	ENTER; SAVETMPS;
		832	PUSHMARK (SP);
		833	// we re-bless the reference to get overload and other niceties right
		834	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		835
		836	// calling with G_SCALAR ensures that we always get a 1 return value
		837	PUTBACK;
		838	call_sv ((SV *)GvCV (method), G_SCALAR);
		839	SPAGAIN;
		840
		841	// catch this surprisingly common error
		842	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		843	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		844
		845	sv = POPs;
		846	PUTBACK;
		847
		848	encode_sv (enc, sv);
		849
		850	FREETMPS; LEAVE;
		851	}
		852	else if (enc->json.flags & F_ALLOW_BLESSED)
		853	encode_str (enc, "null", 4, 0);
560	else	854	else
561	{
562	#if 0
563	if (0 && sv_derived_from (rv, "JSON::Literal"))
564	{
565	// not yet
566	}
567	#endif
568	if (enc->json.flags & F_CONV_BLESSED)
569	{
570	// we re-bless the reference to get overload and other niceties right
571	GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 0);
572
573	if (to_json)
574	{
575	dSP;
576
577	ENTER; SAVETMPS; PUSHMARK (SP);
578	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
579
580	// calling with G_SCALAR ensures that we always get a 1 return value
581	PUTBACK;
582	call_sv ((SV *)GvCV (to_json), G_SCALAR);
583	SPAGAIN;
584
585	// catch this surprisingly common error
586	if (SvROK (TOPs) && SvRV (TOPs) == sv)
587	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
588
589	sv = POPs;
590	PUTBACK;
591
592	encode_sv (enc, sv);
593
594	FREETMPS; LEAVE;
595	}
596	else if (enc->json.flags & F_ALLOW_BLESSED)
597	encode_str (enc, "null", 4, 0);
598	else
599	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
600	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
601	}
602	else if (enc->json.flags & F_ALLOW_BLESSED)
603	encode_str (enc, "null", 4, 0);
604	else
605	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	855	croak ("encountered object '%s', but neither allow_blessed, convert_blessed nor allow_tags settings are enabled (or TO_JSON/FREEZE method missing)",
606	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	856	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
607	}
608	}	857	}
609	else if (svt == SVt_PVHV)	858	else if (svt == SVt_PVHV)
610	encode_hv (enc, (HV *)sv);	859	encode_hv (enc, (HV *)sv);
611	else if (svt == SVt_PVAV)	860	else if (svt == SVt_PVAV)
612	encode_av (enc, (AV *)sv);	861	encode_av (enc, (AV *)sv);
613	else if (svt < SVt_PVAV)	862	else if (svt < SVt_PVAV)
614	{	863	{
615	STRLEN len = 0;	864	int bool_type = ref_bool_type (sv);
616	char *pv = svt ? SvPV (sv, len) : 0;
617		865
618	if (len == 1 && *pv == '1')	866	if (bool_type == 1)
619	encode_str (enc, "true", 4, 0);	867	encode_str (enc, "true", 4, 0);
620	else if (len == 1 && *pv == '0')	868	else if (bool_type == 0)
621	encode_str (enc, "false", 5, 0);	869	encode_str (enc, "false", 5, 0);
		870	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		871	encode_str (enc, "null", 4, 0);
622	else	872	else
623	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",	873	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
624	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	874	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
625	}	875	}
		876	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		877	encode_str (enc, "null", 4, 0);
626	else	878	else
627	croak ("encountered %s, but JSON can only represent references to arrays or hashes",	879	croak ("encountered %s, but JSON can only represent references to arrays or hashes",
628	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	880	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
629	}	881	}
630		882
…		…
684	}	936	}
685	else	937	else
686	{	938	{
687	// large integer, use the (rather slow) snprintf way.	939	// large integer, use the (rather slow) snprintf way.
688	need (enc, IVUV_MAXCHARS);	940	need (enc, IVUV_MAXCHARS);
689	enc->cur +=	941	enc->cur +=
690	SvIsUV(sv)	942	SvIsUV(sv)
691	? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv))	943	? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv))
692	: snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv));	944	: snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv));
693	}	945	}
694	}	946	}
695	else if (SvROK (sv))	947	else if (SvROK (sv))
696	encode_rv (enc, SvRV (sv));	948	encode_rv (enc, SvRV (sv));
697	else if (!SvOK (sv))	949	else if (!SvOK (sv) \|\| enc->json.flags & F_ALLOW_UNKNOWN)
698	encode_str (enc, "null", 4, 0);	950	encode_str (enc, "null", 4, 0);
699	else	951	else
700	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",	952	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, check your input data",
701	SvPV_nolen (sv), SvFLAGS (sv));	953	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
702	}	954	}
703		955
704	static SV *	956	static SV *
705	encode_json (SV scalar, JSON json)	957	encode_json (SV scalar, JSON json)
706	{	958	{
707	enc_t enc;	959	enc_t enc;
708		960
709	if (!(json->flags & F_ALLOW_NONREF) && !SvROK (scalar))	961	if (!(json->flags & F_ALLOW_NONREF) && json_nonref (scalar))
710	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");	962	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
711		963
712	enc.json = *json;	964	enc.json = *json;
713	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	965	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
714	enc.cur = SvPVX (enc.sv);	966	enc.cur = SvPVX (enc.sv);
715	enc.end = SvEND (enc.sv);	967	enc.end = SvEND (enc.sv);
716	enc.indent = 0;	968	enc.indent = 0;
717	enc.maxdepth = DEC_DEPTH (enc.json.flags);
718	enc.limit = enc.json.flags & F_ASCII ? 0x000080UL	969	enc.limit = enc.json.flags & F_ASCII ? 0x000080UL
719	: enc.json.flags & F_LATIN1 ? 0x000100UL	970	: enc.json.flags & F_LATIN1 ? 0x000100UL
720	: 0x110000UL;	971	: 0x110000UL;
721		972
722	SvPOK_only (enc.sv);	973	SvPOK_only (enc.sv);
723	encode_sv (&enc, scalar);	974	encode_sv (&enc, scalar);
		975	encode_nl (&enc);
724		976
725	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	977	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
726	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	978	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
727		979
728	if (!(enc.json.flags & (F_ASCII \| F_LATIN1 \| F_UTF8)))	980	if (!(enc.json.flags & (F_ASCII \| F_LATIN1 \| F_UTF8)))
…		…
789	if (*dec->cur != ch) \	1041	if (*dec->cur != ch) \
790	ERR (# ch " expected"); \	1042	ERR (# ch " expected"); \
791	++dec->cur; \	1043	++dec->cur; \
792	SE	1044	SE
793		1045
794	#define DEC_INC_DEPTH if (++dec->depth > dec->maxdepth) ERR ("json datastructure exceeds maximum nesting level (set a higher max_depth)")	1046	#define DEC_INC_DEPTH if (++dec->depth > dec->json.max_depth) ERR (ERR_NESTING_EXCEEDED)
795	#define DEC_DEC_DEPTH --dec->depth	1047	#define DEC_DEC_DEPTH --dec->depth
796		1048
797	static SV decode_sv (dec_t dec);	1049	static SV decode_sv (dec_t dec);
798		1050
799	static signed char decode_hexdigit[256];	1051	static signed char decode_hexdigit[256];
…		…
908	else if (expect_true (ch >= 0x20 && ch < 0x80))	1160	else if (expect_true (ch >= 0x20 && ch < 0x80))
909	*cur++ = ch;	1161	*cur++ = ch;
910	else if (ch >= 0x80)	1162	else if (ch >= 0x80)
911	{	1163	{
912	STRLEN clen;	1164	STRLEN clen;
913	UV uch;
914		1165
915	--dec_cur;	1166	--dec_cur;
916		1167
917	uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen);	1168	decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
918	if (clen == (STRLEN)-1)	1169	if (clen == (STRLEN)-1)
919	ERR ("malformed UTF-8 character in JSON string");	1170	ERR ("malformed UTF-8 character in JSON string");
920		1171
921	do	1172	do
922	cur++ = dec_cur++;	1173	cur++ = dec_cur++;
923	while (--clen);	1174	while (--clen);
924		1175
925	utf8 = 1;	1176	utf8 = 1;
926	}	1177	}
		1178	else if (ch == '\t' && dec->json.flags & F_RELAXED)
		1179	*cur++ = ch;
927	else	1180	else
928	{	1181	{
929	--dec_cur;	1182	--dec_cur;
930		1183
931	if (!ch)	1184	if (!ch)
…		…
939	{	1192	{
940	STRLEN len = cur - buf;	1193	STRLEN len = cur - buf;
941		1194
942	if (sv)	1195	if (sv)
943	{	1196	{
944	SvGROW (sv, SvCUR (sv) + len + 1);	1197	STRLEN cur = SvCUR (sv);
		1198
		1199	if (SvLEN (sv) - cur <= len)
		1200	json_sv_grow (sv, cur, len);
		1201
945	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);	1202	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);
946	SvCUR_set (sv, SvCUR (sv) + len);	1203	SvCUR_set (sv, SvCUR (sv) + len);
947	}	1204	}
948	else	1205	else
949	sv = newSVpvn (buf, len);	1206	sv = newSVpvn (buf, len);
…		…
1040		1297
1041	// special case the rather common 1..5-digit-int case	1298	// special case the rather common 1..5-digit-int case
1042	if (*start == '-')	1299	if (*start == '-')
1043	switch (len)	1300	switch (len)
1044	{	1301	{
1045	case 2: return newSViv (-( start [1] - '0' * 1));	1302	case 2: return newSViv (-(IV)( start [1] - '0' * 1));
1046	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));	1303	case 3: return newSViv (-(IV)( start [1] * 10 + start [2] - '0' * 11));
1047	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));	1304	case 4: return newSViv (-(IV)( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
1048	case 5: return newSViv (-( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));	1305	case 5: return newSViv (-(IV)( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
1049	case 6: return newSViv (-(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));	1306	case 6: return newSViv (-(IV)(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));
1050	}	1307	}
1051	else	1308	else
1052	switch (len)	1309	switch (len)
1053	{	1310	{
1054	case 1: return newSViv ( start [0] - '0' * 1);	1311	case 1: return newSViv ( start [0] - '0' * 1);
1055	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);	1312	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
1056	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);	1313	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
1057	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);	1314	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
1058	case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);	1315	case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);
1059	}	1316	}
1060		1317
1061	{	1318	{
1062	UV uv;	1319	UV uv;
1063	int numtype = grok_number (start, len, &uv);	1320	int numtype = grok_number (start, len, &uv);
…		…
1072	}	1329	}
1073		1330
1074	len -= *start == '-' ? 1 : 0;	1331	len -= *start == '-' ? 1 : 0;
1075		1332
1076	// does not fit into IV or UV, try NV	1333	// does not fit into IV or UV, try NV
1077	if ((sizeof (NV) == sizeof (double) && DBL_DIG >= len)	1334	if (len <= NV_DIG)
1078	#if defined (LDBL_DIG)
1079	\|\| (sizeof (NV) == sizeof (long double) && LDBL_DIG >= len)
1080	#endif
1081	)
1082	// fits into NV without loss of precision	1335	// fits into NV without loss of precision
1083	return newSVnv (Atof (start));	1336	return newSVnv (json_atof (start));
1084		1337
1085	// everything else fails, convert it to a string	1338	// everything else fails, convert it to a string
1086	return newSVpvn (start, dec->cur - start);	1339	return newSVpvn (start, dec->cur - start);
1087	}	1340	}
1088		1341
1089	// loss of precision here	1342	// loss of precision here
1090	return newSVnv (Atof (start));	1343	return newSVnv (json_atof (start));
1091		1344
1092	fail:	1345	fail:
1093	return 0;	1346	return 0;
1094	}	1347	}
1095		1348
…		…
1119	if (*dec->cur == ']')	1372	if (*dec->cur == ']')
1120	{	1373	{
1121	++dec->cur;	1374	++dec->cur;
1122	break;	1375	break;
1123	}	1376	}
1124		1377
1125	if (*dec->cur != ',')	1378	if (*dec->cur != ',')
1126	ERR (", or ] expected while parsing array");	1379	ERR (", or ] expected while parsing array");
1127		1380
1128	++dec->cur;	1381	++dec->cur;
1129		1382
…		…
1171	char *p = dec->cur;	1424	char *p = dec->cur;
1172	char *e = p + 24; // only try up to 24 bytes	1425	char *e = p + 24; // only try up to 24 bytes
1173		1426
1174	for (;;)	1427	for (;;)
1175	{	1428	{
1176	// the >= 0x80 is true on most architectures	1429	// the >= 0x80 is false on most architectures
1177	if (p == e \|\| p < 0x20 \|\| p >= 0x80 \|\| *p == '\\')	1430	if (p == e \|\| p < 0x20 \|\| p >= 0x80 \|\| *p == '\\')
1178	{	1431	{
1179	// slow path, back up and use decode_str	1432	// slow path, back up and use decode_str
1180	SV *key = decode_str (dec);	1433	SV *key = decode_str (dec);
1181	if (!key)	1434	if (!key)
…		…
1253		1506
1254	hv_iterinit (hv);	1507	hv_iterinit (hv);
1255	he = hv_iternext (hv);	1508	he = hv_iternext (hv);
1256	hv_iterinit (hv);	1509	hv_iterinit (hv);
1257		1510
1258	// the next line creates a mortal sv each time its called.	1511	// the next line creates a mortal sv each time it's called.
1259	// might want to optimise this for common cases.	1512	// might want to optimise this for common cases.
1260	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);	1513	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);
1261		1514
1262	if (cb)	1515	if (cb)
1263	{	1516	{
1264	dSP;	1517	dSP;
1265	int count;	1518	int count;
1266		1519
1267	ENTER; SAVETMPS; PUSHMARK (SP);	1520	ENTER; SAVETMPS;
		1521	SAVESTACK_POS ();
		1522	PUSHMARK (SP);
1268	XPUSHs (HeVAL (he));	1523	XPUSHs (HeVAL (he));
		1524	sv_2mortal (sv);
1269		1525
1270	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;	1526	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
1271		1527
1272	if (count == 1)	1528	if (count == 1)
1273	{	1529	{
1274	sv = newSVsv (POPs);	1530	sv = newSVsv (POPs);
1275	FREETMPS; LEAVE;	1531	FREETMPS; LEAVE;
1276	return sv;	1532	return sv;
1277	}	1533	}
1278		1534
		1535	SvREFCNT_inc (sv);
1279	FREETMPS; LEAVE;	1536	FREETMPS; LEAVE;
1280	}	1537	}
1281	}	1538	}
1282		1539
1283	if (dec->json.cb_object)	1540	if (dec->json.cb_object)
1284	{	1541	{
1285	dSP;	1542	dSP;
1286	int count;	1543	int count;
1287		1544
1288	ENTER; SAVETMPS; PUSHMARK (SP);	1545	ENTER; SAVETMPS;
		1546	SAVESTACK_POS ();
		1547	PUSHMARK (SP);
1289	XPUSHs (sv_2mortal (sv));	1548	XPUSHs (sv_2mortal (sv));
1290		1549
1291	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;	1550	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;
1292		1551
1293	if (count == 1)	1552	if (count == 1)
…		…
1309	DEC_DEC_DEPTH;	1568	DEC_DEC_DEPTH;
1310	return 0;	1569	return 0;
1311	}	1570	}
1312		1571
1313	static SV *	1572	static SV *
		1573	decode_tag (dec_t *dec)
		1574	{
		1575	SV *tag = 0;
		1576	SV *val = 0;
		1577
		1578	if (!(dec->json.flags & F_ALLOW_TAGS))
		1579	ERR ("malformed JSON string, neither array, object, number, string or atom");
		1580
		1581	++dec->cur;
		1582
		1583	decode_ws (dec);
		1584
		1585	tag = decode_sv (dec);
		1586	if (!tag)
		1587	goto fail;
		1588
		1589	if (!SvPOK (tag))
		1590	ERR ("malformed JSON string, (tag) must be a string");
		1591
		1592	decode_ws (dec);
		1593
		1594	if (*dec->cur != ')')
		1595	ERR (") expected after tag");
		1596
		1597	++dec->cur;
		1598
		1599	decode_ws (dec);
		1600
		1601	val = decode_sv (dec);
		1602	if (!val)
		1603	goto fail;
		1604
		1605	if (!SvROK (val) \|\| SvTYPE (SvRV (val)) != SVt_PVAV)
		1606	ERR ("malformed JSON string, tag value must be an array");
		1607
		1608	{
		1609	AV av = (AV )SvRV (val);
		1610	int i, len = av_len (av) + 1;
		1611	HV *stash = gv_stashsv (tag, 0);
		1612	SV *sv;
		1613
		1614	if (!stash)
		1615	ERR ("cannot decode perl-object (package does not exist)");
		1616
		1617	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1618
		1619	if (!method)
		1620	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1621
		1622	dSP;
		1623
		1624	ENTER; SAVETMPS;
		1625	PUSHMARK (SP);
		1626	EXTEND (SP, len + 2);
		1627	// we re-bless the reference to get overload and other niceties right
		1628	PUSHs (tag);
		1629	PUSHs (sv_json);
		1630
		1631	for (i = 0; i < len; ++i)
		1632	PUSHs (*av_fetch (av, i, 1));
		1633
		1634	PUTBACK;
		1635	call_sv ((SV *)GvCV (method), G_SCALAR);
		1636	SPAGAIN;
		1637
		1638	SvREFCNT_dec (tag);
		1639	SvREFCNT_dec (val);
		1640	sv = SvREFCNT_inc (POPs);
		1641
		1642	PUTBACK;
		1643
		1644	FREETMPS; LEAVE;
		1645
		1646	return sv;
		1647	}
		1648
		1649	fail:
		1650	SvREFCNT_dec (tag);
		1651	SvREFCNT_dec (val);
		1652	return 0;
		1653	}
		1654
		1655	static SV *
1314	decode_sv (dec_t *dec)	1656	decode_sv (dec_t *dec)
1315	{	1657	{
1316	// the beauty of JSON: you need exactly one character lookahead	1658	// the beauty of JSON: you need exactly one character lookahead
1317	// to parse everything.	1659	// to parse everything.
1318	switch (*dec->cur)	1660	switch (*dec->cur)
1319	{	1661	{
1320	case '"': ++dec->cur; return decode_str (dec);	1662	case '"': ++dec->cur; return decode_str (dec);
1321	case '[': ++dec->cur; return decode_av (dec);	1663	case '[': ++dec->cur; return decode_av (dec);
1322	case '{': ++dec->cur; return decode_hv (dec);	1664	case '{': ++dec->cur; return decode_hv (dec);
		1665	case '(': return decode_tag (dec);
1323		1666
1324	case '-':	1667	case '-':
1325	case '0': case '1': case '2': case '3': case '4':	1668	case '0': case '1': case '2': case '3': case '4':
1326	case '5': case '6': case '7': case '8': case '9':	1669	case '5': case '6': case '7': case '8': case '9':
1327	return decode_num (dec);	1670	return decode_num (dec);
1328		1671
		1672	case 'f':
		1673	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
		1674	{
		1675	dec->cur += 5;
		1676
		1677	if (expect_false (!dec->json.v_false))
		1678	dec->json.v_false = GET_BOOL (false);
		1679
		1680	return newSVsv (dec->json.v_false);
		1681	}
		1682	else
		1683	ERR ("'false' expected");
		1684
		1685	break;
		1686
1329	case 't':	1687	case 't':
1330	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1688	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
1331	{	1689	{
1332	dec->cur += 4;	1690	dec->cur += 4;
1333	#if JSON_SLOW	1691
1334	json_true = get_sv ("JSON::XS::true", 1); SvREADONLY_on (json_true);	1692	if (expect_false (!dec->json.v_true))
1335	#endif	1693	dec->json.v_true = GET_BOOL (true);
1336	return SvREFCNT_inc (json_true);	1694
		1695	return newSVsv (dec->json.v_true);
1337	}	1696	}
1338	else	1697	else
1339	ERR ("'true' expected");	1698	ERR ("'true' expected");
1340
1341	break;
1342
1343	case 'f':
1344	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
1345	{
1346	dec->cur += 5;
1347	#if JSON_SLOW
1348	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);
1349	#endif
1350	return SvREFCNT_inc (json_false);
1351	}
1352	else
1353	ERR ("'false' expected");
1354		1699
1355	break;	1700	break;
1356		1701
1357	case 'n':	1702	case 'n':
1358	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))	1703	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
…		…
1364	ERR ("'null' expected");	1709	ERR ("'null' expected");
1365		1710
1366	break;	1711	break;
1367		1712
1368	default:	1713	default:
1369	ERR ("malformed JSON string, neither array, object, number, string or atom");	1714	ERR ("malformed JSON string, neither tag, array, object, number, string or atom");
1370	break;	1715	break;
1371	}	1716	}
1372		1717
1373	fail:	1718	fail:
1374	return 0;	1719	return 0;
1375	}	1720	}
1376		1721
1377	static SV *	1722	static SV *
1378	decode_json (SV string, JSON json, UV *offset_return)	1723	decode_json (SV string, JSON json, STRLEN *offset_return)
1379	{	1724	{
1380	dec_t dec;	1725	dec_t dec;
1381	UV offset;
1382	SV *sv;	1726	SV *sv;
1383		1727
		1728	/* work around bugs in 5.10 where manipulating magic values
		1729	* makes perl ignore the magic in subsequent accesses.
		1730	* also make a copy of non-PV values, to get them into a clean
		1731	* state (SvPV should do that, but it's buggy, see below).
		1732	*
		1733	* SvIsCOW_shared_hash works around a bug in perl (possibly 5.16),
		1734	* as reported by Reini Urban.
		1735	*/
1384	SvGETMAGIC (string);	1736	/SvGETMAGIC (string);/
		1737	if (SvMAGICAL (string) \|\| !SvPOK (string) \|\| SvIsCOW_shared_hash (string))
		1738	string = sv_2mortal (newSVsv (string));
		1739
1385	SvUPGRADE (string, SVt_PV);	1740	SvUPGRADE (string, SVt_PV);
1386		1741
1387	if (json->flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (json->flags))	1742	/* work around a bug in perl 5.10, which causes SvCUR to fail an
		1743	* assertion with -DDEBUGGING, although SvCUR is documented to
		1744	* return the xpv_cur field which certainly exists after upgrading.
		1745	* according to nicholas clark, calling SvPOK fixes this.
		1746	* But it doesn't fix it, so try another workaround, call SvPV_nolen
		1747	* and hope for the best.
		1748	* Damnit, SvPV_nolen still trips over yet another assertion. This
		1749	* assertion business is seriously broken, try yet another workaround
		1750	* for the broken -DDEBUGGING.
		1751	*/
		1752	{
		1753	#ifdef DEBUGGING
		1754	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
		1755	#else
		1756	STRLEN offset = SvCUR (string);
		1757	#endif
		1758
		1759	if (offset > json->max_size && json->max_size)
1388	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",	1760	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
1389	(unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (json->flags));	1761	(unsigned long)SvCUR (string), (unsigned long)json->max_size);
		1762	}
1390		1763
1391	if (json->flags & F_UTF8)	1764	if (DECODE_WANTS_OCTETS (json))
1392	sv_utf8_downgrade (string, 0);	1765	sv_utf8_downgrade (string, 0);
1393	else	1766	else
1394	sv_utf8_upgrade (string);	1767	sv_utf8_upgrade (string);
1395		1768
1396	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1769	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
1397		1770
1398	dec.json = *json;	1771	dec.json = *json;
1399	dec.cur = SvPVX (string);	1772	dec.cur = SvPVX (string);
1400	dec.end = SvEND (string);	1773	dec.end = SvEND (string);
1401	dec.err = 0;	1774	dec.err = 0;
1402	dec.depth = 0;	1775	dec.depth = 0;
1403	dec.maxdepth = DEC_DEPTH (dec.json.flags);
1404		1776
1405	if (dec.json.cb_object \|\| dec.json.cb_sk_object)	1777	if (dec.json.cb_object \|\| dec.json.cb_sk_object)
1406	dec.json.flags \|= F_HOOK;	1778	dec.json.flags \|= F_HOOK;
1407		1779
1408	*dec.end = 0; // this should basically be a nop, too, but make sure it's there	1780	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
1409		1781
1410	decode_ws (&dec);	1782	decode_ws (&dec);
1411	sv = decode_sv (&dec);	1783	sv = decode_sv (&dec);
1412		1784
1413	if (!(offset_return \|\| !sv))	1785	if (offset_return)
		1786	*offset_return = dec.cur - SvPVX (string);
		1787	else if (sv)
1414	{	1788	{
1415	// check for trailing garbage	1789	// check for trailing garbage
1416	decode_ws (&dec);	1790	decode_ws (&dec);
1417		1791
1418	if (*dec.cur)	1792	if (*dec.cur)
1419	{	1793	{
1420	dec.err = "garbage after JSON object";	1794	dec.err = "garbage after JSON object";
1421	SvREFCNT_dec (sv);	1795	SvREFCNT_dec (sv);
1422	sv = 0;	1796	sv = 0;
1423	}	1797	}
1424	}
1425
1426	if (offset_return \|\| !sv)
1427	{
1428	offset = dec.json.flags & F_UTF8
1429	? dec.cur - SvPVX (string)
1430	: utf8_distance (dec.cur, SvPVX (string));
1431
1432	if (offset_return)
1433	*offset_return = offset;
1434	}	1798	}
1435		1799
1436	if (!sv)	1800	if (!sv)
1437	{	1801	{
1438	SV *uni = sv_newmortal ();	1802	SV *uni = sv_newmortal ();
…		…
1444	SAVEVPTR (PL_curcop);	1808	SAVEVPTR (PL_curcop);
1445	PL_curcop = &cop;	1809	PL_curcop = &cop;
1446	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);	1810	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);
1447	LEAVE;	1811	LEAVE;
1448		1812
1449	croak ("%s, at character offset %d [\"%s\"]",	1813	croak ("%s, at character offset %d (before \"%s\")",
1450	dec.err,	1814	dec.err,
1451	(int)offset,	1815	(int)ptr_to_index (string, dec.cur),
1452	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1816	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
1453	}	1817	}
1454		1818
1455	sv = sv_2mortal (sv);	1819	sv = sv_2mortal (sv);
1456		1820
1457	if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))	1821	if (!(dec.json.flags & F_ALLOW_NONREF) && json_nonref (sv))
1458	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");	1822	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
1459		1823
1460	return sv;	1824	return sv;
		1825	}
		1826
		1827	/////////////////////////////////////////////////////////////////////////////
		1828	// incremental parser
		1829
		1830	static void
		1831	incr_parse (JSON *self)
		1832	{
		1833	const char *p = SvPVX (self->incr_text) + self->incr_pos;
		1834
		1835	// the state machine here is a bit convoluted and could be simplified a lot
		1836	// but this would make it slower, so...
		1837
		1838	for (;;)
		1839	{
		1840	//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
		1841	switch (self->incr_mode)
		1842	{
		1843	// only used for initial whitespace skipping
		1844	case INCR_M_WS:
		1845	for (;;)
		1846	{
		1847	if (*p > 0x20)
		1848	{
		1849	if (*p == '#')
		1850	{
		1851	self->incr_mode = INCR_M_C0;
		1852	goto incr_m_c;
		1853	}
		1854	else
		1855	{
		1856	self->incr_mode = INCR_M_JSON;
		1857	goto incr_m_json;
		1858	}
		1859	}
		1860	else if (!*p)
		1861	goto interrupt;
		1862
		1863	++p;
		1864	}
		1865
		1866	// skip a single char inside a string (for \\-processing)
		1867	case INCR_M_BS:
		1868	if (!*p)
		1869	goto interrupt;
		1870
		1871	++p;
		1872	self->incr_mode = INCR_M_STR;
		1873	goto incr_m_str;
		1874
		1875	// inside #-style comments
		1876	case INCR_M_C0:
		1877	case INCR_M_C1:
		1878	incr_m_c:
		1879	for (;;)
		1880	{
		1881	if (*p == '\n')
		1882	{
		1883	self->incr_mode = self->incr_mode == INCR_M_C0 ? INCR_M_WS : INCR_M_JSON;
		1884	break;
		1885	}
		1886	else if (!*p)
		1887	goto interrupt;
		1888
		1889	++p;
		1890	}
		1891
		1892	break;
		1893
		1894	// inside a string
		1895	case INCR_M_STR:
		1896	incr_m_str:
		1897	for (;;)
		1898	{
		1899	if (*p == '"')
		1900	{
		1901	++p;
		1902	self->incr_mode = INCR_M_JSON;
		1903
		1904	if (!self->incr_nest)
		1905	goto interrupt;
		1906
		1907	goto incr_m_json;
		1908	}
		1909	else if (*p == '\\')
		1910	{
		1911	++p; // "virtually" consumes character after \
		1912
		1913	if (!*p) // if at end of string we have to switch modes
		1914	{
		1915	self->incr_mode = INCR_M_BS;
		1916	goto interrupt;
		1917	}
		1918	}
		1919	else if (!*p)
		1920	goto interrupt;
		1921
		1922	++p;
		1923	}
		1924
		1925	// after initial ws, outside string
		1926	case INCR_M_JSON:
		1927	incr_m_json:
		1928	for (;;)
		1929	{
		1930	switch (*p++)
		1931	{
		1932	case 0:
		1933	--p;
		1934	goto interrupt;
		1935
		1936	case 0x09:
		1937	case 0x0a:
		1938	case 0x0d:
		1939	case 0x20:
		1940	if (!self->incr_nest)
		1941	{
		1942	--p; // do not eat the whitespace, let the next round do it
		1943	goto interrupt;
		1944	}
		1945	break;
		1946
		1947	case '"':
		1948	self->incr_mode = INCR_M_STR;
		1949	goto incr_m_str;
		1950
		1951	case '[':
		1952	case '{':
		1953	case '(':
		1954	if (++self->incr_nest > self->max_depth)
		1955	croak (ERR_NESTING_EXCEEDED);
		1956	break;
		1957
		1958	case ']':
		1959	case '}':
		1960	if (--self->incr_nest <= 0)
		1961	goto interrupt;
		1962	break;
		1963
		1964	case ')':
		1965	--self->incr_nest;
		1966	break;
		1967
		1968	case '#':
		1969	self->incr_mode = INCR_M_C1;
		1970	goto incr_m_c;
		1971	}
		1972	}
		1973	}
		1974
		1975	modechange:
		1976	;
		1977	}
		1978
		1979	interrupt:
		1980	self->incr_pos = p - SvPVX (self->incr_text);
		1981	//printf ("interrupt<%.*s>\n", self->incr_pos, SvPVX(self->incr_text));//D
		1982	//printf ("return pos %d mode %d nest %d\n", self->incr_pos, self->incr_mode, self->incr_nest);//D
1461	}	1983	}
1462		1984
1463	/////////////////////////////////////////////////////////////////////////////	1985	/////////////////////////////////////////////////////////////////////////////
1464	// XS interface functions	1986	// XS interface functions
1465		1987
…		…
1474	i >= '0' && i <= '9' ? i - '0'	1996	i >= '0' && i <= '9' ? i - '0'
1475	: i >= 'a' && i <= 'f' ? i - 'a' + 10	1997	: i >= 'a' && i <= 'f' ? i - 'a' + 10
1476	: i >= 'A' && i <= 'F' ? i - 'A' + 10	1998	: i >= 'A' && i <= 'F' ? i - 'A' + 10
1477	: -1;	1999	: -1;
1478		2000
1479	json_stash = gv_stashpv ("JSON::XS" , 1);	2001	json_stash = gv_stashpv ("JSON::XS" , 1);
1480	json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);	2002	bool_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
		2003	bool_false = get_bool ("Types::Serialiser::false");
		2004	bool_true = get_bool ("Types::Serialiser::true");
1481		2005
1482	json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true );	2006	sv_json = newSVpv ("JSON", 0);
1483	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);	2007	SvREADONLY_on (sv_json);
		2008
		2009	CvNODEBUG_on (get_cv ("JSON::XS::incr_text", 0)); /* the debugger completely breaks lvalue subs */
1484	}	2010	}
1485		2011
1486	PROTOTYPES: DISABLE	2012	PROTOTYPES: DISABLE
1487		2013
1488	void CLONE (...)	2014	void CLONE (...)
1489	CODE:	2015	CODE:
		2016	// as long as these writes are atomic, the race should not matter
		2017	// as existing threads either already use 0, or use the old value,
		2018	// which is sitll correct for the initial thread.
1490	json_stash = 0;	2019	json_stash = 0;
1491	json_boolean_stash = 0;	2020	bool_stash = 0;
		2021	bool_false = 0;
		2022	bool_true = 0;
1492		2023
1493	void new (char *klass)	2024	void new (char *klass)
1494	PPCODE:	2025	PPCODE:
1495	{	2026	{
1496	SV *pv = NEWSV (0, sizeof (JSON));	2027	SV *pv = NEWSV (0, sizeof (JSON));
1497	SvPOK_only (pv);	2028	SvPOK_only (pv);
1498	Zero (SvPVX (pv), 1, JSON);	2029	json_init ((JSON *)SvPVX (pv));
1499	((JSON *)SvPVX (pv))->flags = F_DEFAULT;
1500	XPUSHs (sv_2mortal (sv_bless (	2030	XPUSHs (sv_2mortal (sv_bless (
1501	newRV_noinc (pv),	2031	newRV_noinc (pv),
1502	strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)	2032	strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)
1503	)));	2033	)));
1504	}	2034	}
		2035
		2036	void boolean_values (JSON self, SV v_false = 0, SV *v_true = 0)
		2037	PPCODE:
		2038	self->v_false = newSVsv (v_false);
		2039	self->v_true = newSVsv (v_true);
		2040	XPUSHs (ST (0));
		2041
		2042	void get_boolean_values (JSON *self)
		2043	PPCODE:
		2044	if (self->v_false && self->v_true)
		2045	{
		2046	EXTEND (SP, 2);
		2047	PUSHs (self->v_false);
		2048	PUSHs (self->v_true);
		2049	}
1505		2050
1506	void ascii (JSON *self, int enable = 1)	2051	void ascii (JSON *self, int enable = 1)
1507	ALIAS:	2052	ALIAS:
1508	ascii = F_ASCII	2053	ascii = F_ASCII
1509	latin1 = F_LATIN1	2054	latin1 = F_LATIN1
…		…
1516	allow_nonref = F_ALLOW_NONREF	2061	allow_nonref = F_ALLOW_NONREF
1517	shrink = F_SHRINK	2062	shrink = F_SHRINK
1518	allow_blessed = F_ALLOW_BLESSED	2063	allow_blessed = F_ALLOW_BLESSED
1519	convert_blessed = F_CONV_BLESSED	2064	convert_blessed = F_CONV_BLESSED
1520	relaxed = F_RELAXED	2065	relaxed = F_RELAXED
		2066	allow_unknown = F_ALLOW_UNKNOWN
		2067	allow_tags = F_ALLOW_TAGS
1521	PPCODE:	2068	PPCODE:
1522	{	2069	{
1523	if (enable)	2070	if (enable)
1524	self->flags \|= ix;	2071	self->flags \|= ix;
1525	else	2072	else
…		…
1540	get_allow_nonref = F_ALLOW_NONREF	2087	get_allow_nonref = F_ALLOW_NONREF
1541	get_shrink = F_SHRINK	2088	get_shrink = F_SHRINK
1542	get_allow_blessed = F_ALLOW_BLESSED	2089	get_allow_blessed = F_ALLOW_BLESSED
1543	get_convert_blessed = F_CONV_BLESSED	2090	get_convert_blessed = F_CONV_BLESSED
1544	get_relaxed = F_RELAXED	2091	get_relaxed = F_RELAXED
		2092	get_allow_unknown = F_ALLOW_UNKNOWN
		2093	get_allow_tags = F_ALLOW_TAGS
1545	PPCODE:	2094	PPCODE:
1546	XPUSHs (boolSV (self->flags & ix));	2095	XPUSHs (boolSV (self->flags & ix));
1547		2096
1548	void max_depth (JSON *self, UV max_depth = 0x80000000UL)	2097	void max_depth (JSON *self, U32 max_depth = 0x80000000UL)
1549	PPCODE:	2098	PPCODE:
1550	{	2099	self->max_depth = max_depth;
1551	UV log2 = 0;
1552
1553	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;
1554
1555	while ((1UL << log2) < max_depth)
1556	++log2;
1557
1558	self->flags = self->flags & ~F_MAXDEPTH \| (log2 << S_MAXDEPTH);
1559
1560	XPUSHs (ST (0));	2100	XPUSHs (ST (0));
1561	}
1562		2101
1563	U32 get_max_depth (JSON *self)	2102	U32 get_max_depth (JSON *self)
1564	CODE:	2103	CODE:
1565	RETVAL = DEC_DEPTH (self->flags);	2104	RETVAL = self->max_depth;
1566	OUTPUT:	2105	OUTPUT:
1567	RETVAL	2106	RETVAL
1568		2107
1569	void max_size (JSON *self, UV max_size = 0)	2108	void max_size (JSON *self, U32 max_size = 0)
1570	PPCODE:	2109	PPCODE:
1571	{	2110	self->max_size = max_size;
1572	UV log2 = 0;
1573
1574	if (max_size > 0x80000000UL) max_size = 0x80000000UL;
1575	if (max_size == 1) max_size = 2;
1576
1577	while ((1UL << log2) < max_size)
1578	++log2;
1579
1580	self->flags = self->flags & ~F_MAXSIZE \| (log2 << S_MAXSIZE);
1581
1582	XPUSHs (ST (0));	2111	XPUSHs (ST (0));
1583	}
1584		2112
1585	int get_max_size (JSON *self)	2113	int get_max_size (JSON *self)
1586	CODE:	2114	CODE:
1587	RETVAL = DEC_SIZE (self->flags);	2115	RETVAL = self->max_size;
1588	OUTPUT:	2116	OUTPUT:
1589	RETVAL	2117	RETVAL
1590		2118
1591	void filter_json_object (JSON self, SV cb = &PL_sv_undef)	2119	void filter_json_object (JSON self, SV cb = &PL_sv_undef)
1592	PPCODE:	2120	PPCODE:
…		…
1598	}	2126	}
1599		2127
1600	void filter_json_single_key_object (JSON self, SV key, SV *cb = &PL_sv_undef)	2128	void filter_json_single_key_object (JSON self, SV key, SV *cb = &PL_sv_undef)
1601	PPCODE:	2129	PPCODE:
1602	{	2130	{
1603	if (!self->cb_sk_object)	2131	if (!self->cb_sk_object)
1604	self->cb_sk_object = newHV ();	2132	self->cb_sk_object = newHV ();
1605		2133
1606	if (SvOK (cb))	2134	if (SvOK (cb))
1607	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);	2135	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1608	else	2136	else
…		…
1619	XPUSHs (ST (0));	2147	XPUSHs (ST (0));
1620	}	2148	}
1621		2149
1622	void encode (JSON self, SV scalar)	2150	void encode (JSON self, SV scalar)
1623	PPCODE:	2151	PPCODE:
1624	XPUSHs (encode_json (scalar, self));	2152	PUTBACK; scalar = encode_json (scalar, self); SPAGAIN;
		2153	XPUSHs (scalar);
1625		2154
1626	void decode (JSON self, SV jsonstr)	2155	void decode (JSON self, SV jsonstr)
1627	PPCODE:	2156	PPCODE:
1628	XPUSHs (decode_json (jsonstr, self, 0));	2157	PUTBACK; jsonstr = decode_json (jsonstr, self, 0); SPAGAIN;
		2158	XPUSHs (jsonstr);
1629		2159
1630	void decode_prefix (JSON self, SV jsonstr)	2160	void decode_prefix (JSON self, SV jsonstr)
1631	PPCODE:	2161	PPCODE:
1632	{	2162	{
1633	UV offset;	2163	SV *sv;
		2164	STRLEN offset;
		2165	PUTBACK; sv = decode_json (jsonstr, self, &offset); SPAGAIN;
1634	EXTEND (SP, 2);	2166	EXTEND (SP, 2);
1635	PUSHs (decode_json (jsonstr, self, &offset));	2167	PUSHs (sv);
1636	PUSHs (sv_2mortal (newSVuv (offset)));	2168	PUSHs (sv_2mortal (newSVuv (ptr_to_index (jsonstr, SvPV_nolen (jsonstr) + offset))));
		2169	}
		2170
		2171	void incr_parse (JSON self, SV jsonstr = 0)
		2172	PPCODE:
		2173	{
		2174	if (!self->incr_text)
		2175	self->incr_text = newSVpvn ("", 0);
		2176
		2177	/* if utf8-ness doesn't match the decoder, need to upgrade/downgrade */
		2178	if (!DECODE_WANTS_OCTETS (self) == !SvUTF8 (self->incr_text))
		2179	if (DECODE_WANTS_OCTETS (self))
		2180	{
		2181	if (self->incr_pos)
		2182	self->incr_pos = utf8_length ((U8 *)SvPVX (self->incr_text),
		2183	(U8 *)SvPVX (self->incr_text) + self->incr_pos);
		2184
		2185	sv_utf8_downgrade (self->incr_text, 0);
		2186	}
		2187	else
		2188	{
		2189	sv_utf8_upgrade (self->incr_text);
		2190
		2191	if (self->incr_pos)
		2192	self->incr_pos = utf8_hop ((U8 *)SvPVX (self->incr_text), self->incr_pos)
		2193	- (U8 *)SvPVX (self->incr_text);
		2194	}
		2195
		2196	// append data, if any
		2197	if (jsonstr)
		2198	{
		2199	/* make sure both strings have same encoding */
		2200	if (SvUTF8 (jsonstr) != SvUTF8 (self->incr_text))
		2201	if (SvUTF8 (jsonstr))
		2202	sv_utf8_downgrade (jsonstr, 0);
		2203	else
		2204	sv_utf8_upgrade (jsonstr);
		2205
		2206	/* and then just blindly append */
		2207	{
		2208	STRLEN len;
		2209	const char *str = SvPV (jsonstr, len);
		2210	STRLEN cur = SvCUR (self->incr_text);
		2211
		2212	if (SvLEN (self->incr_text) - cur <= len)
		2213	json_sv_grow (self->incr_text, cur, len);
		2214
		2215	Move (str, SvEND (self->incr_text), len, char);
		2216	SvCUR_set (self->incr_text, SvCUR (self->incr_text) + len);
		2217	*SvEND (self->incr_text) = 0; // this should basically be a nop, too, but make sure it's there
		2218	}
		2219	}
		2220
		2221	if (GIMME_V != G_VOID)
		2222	do
		2223	{
		2224	SV *sv;
		2225	STRLEN offset;
		2226
		2227	if (!INCR_DONE (self))
		2228	{
		2229	incr_parse (self);
		2230
		2231	if (self->incr_pos > self->max_size && self->max_size)
		2232	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		2233	(unsigned long)self->incr_pos, (unsigned long)self->max_size);
		2234
		2235	if (!INCR_DONE (self))
		2236	{
		2237	// as an optimisation, do not accumulate white space in the incr buffer
		2238	if (self->incr_mode == INCR_M_WS && self->incr_pos)
		2239	{
		2240	self->incr_pos = 0;
		2241	SvCUR_set (self->incr_text, 0);
		2242	}
		2243
		2244	break;
		2245	}
		2246	}
		2247
		2248	PUTBACK; sv = decode_json (self->incr_text, self, &offset); SPAGAIN;
		2249	XPUSHs (sv);
		2250
		2251	self->incr_pos -= offset;
		2252	self->incr_nest = 0;
		2253	self->incr_mode = 0;
		2254
		2255	sv_chop (self->incr_text, SvPVX (self->incr_text) + offset);
		2256	}
		2257	while (GIMME_V == G_ARRAY);
		2258	}
		2259
		2260	SV incr_text (JSON self)
		2261	ATTRS: lvalue
		2262	CODE:
		2263	{
		2264	if (self->incr_pos)
		2265	croak ("incr_text can not be called when the incremental parser already started parsing");
		2266
		2267	RETVAL = self->incr_text ? SvREFCNT_inc (self->incr_text) : &PL_sv_undef;
		2268	}
		2269	OUTPUT:
		2270	RETVAL
		2271
		2272	void incr_skip (JSON *self)
		2273	CODE:
		2274	{
		2275	if (self->incr_pos)
		2276	{
		2277	sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + self->incr_pos);
		2278	self->incr_pos = 0;
		2279	self->incr_nest = 0;
		2280	self->incr_mode = 0;
		2281	}
		2282	}
		2283
		2284	void incr_reset (JSON *self)
		2285	CODE:
		2286	{
		2287	SvREFCNT_dec (self->incr_text);
		2288	self->incr_text = 0;
		2289	self->incr_pos = 0;
		2290	self->incr_nest = 0;
		2291	self->incr_mode = 0;
1637	}	2292	}
1638		2293
1639	void DESTROY (JSON *self)	2294	void DESTROY (JSON *self)
1640	CODE:	2295	CODE:
		2296	SvREFCNT_dec (self->v_false);
		2297	SvREFCNT_dec (self->v_true);
1641	SvREFCNT_dec (self->cb_sk_object);	2298	SvREFCNT_dec (self->cb_sk_object);
1642	SvREFCNT_dec (self->cb_object);	2299	SvREFCNT_dec (self->cb_object);
		2300	SvREFCNT_dec (self->incr_text);
1643		2301
1644	PROTOTYPES: ENABLE	2302	PROTOTYPES: ENABLE
1645		2303
1646	void encode_json (SV *scalar)	2304	void encode_json (SV *scalar)
1647	PPCODE:	2305	PPCODE:
1648	{	2306	{
1649	JSON json = { F_DEFAULT \| F_UTF8 };	2307	JSON json;
1650	XPUSHs (encode_json (scalar, &json));	2308	json_init (&json);
		2309	json.flags \|= F_UTF8;
		2310	PUTBACK; scalar = encode_json (scalar, &json); SPAGAIN;
		2311	XPUSHs (scalar);
1651	}	2312	}
1652		2313
1653	void decode_json (SV *jsonstr)	2314	void decode_json (SV *jsonstr)
1654	PPCODE:	2315	PPCODE:
1655	{	2316	{
1656	JSON json = { F_DEFAULT \| F_UTF8 };	2317	JSON json;
1657	XPUSHs (decode_json (jsonstr, &json, 0));	2318	json_init (&json);
		2319	json.flags \|= F_UTF8;
		2320	PUTBACK; jsonstr = decode_json (jsonstr, &json, 0); SPAGAIN;
		2321	XPUSHs (jsonstr);
1658	}	2322	}
1659		2323

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Comparing JSON-XS/XS.xs (file contents): Revision 1.75 by root, Wed Mar 19 15:37:54 2008 UTC vs. Revision 1.133 by root, Tue Aug 28 16:16:17 2018 UTC

Diff Legend

Comparing JSON-XS/XS.xs (file contents):
Revision 1.75 by root, Wed Mar 19 15:37:54 2008 UTC vs.
Revision 1.133 by root, Tue Aug 28 16:16:17 2018 UTC