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Comparing JSON-XS/XS.xs (file contents):
Revision 1.59 by root, Mon Aug 13 16:14:20 2007 UTC vs.
Revision 1.131 by root, Thu Aug 17 01:42:20 2017 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>
		11	#include <inttypes.h>
10		12
11	#if defined(__BORLANDC__) || defined(_MSC_VER)	13	#if defined(__BORLANDC__) || defined(_MSC_VER)
12	# define snprintf _snprintf // C compilers have this in stdio.h	14	# define snprintf _snprintf // C compilers have this in stdio.h
13	#endif	15	#endif
14		16
15	// 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
16	// guarentees, though. if it breaks, you get to keep the pieces.	18	// guarantees, though. if it breaks, you get to keep the pieces.
17	#ifndef UTF8_MAXBYTES	19	#ifndef UTF8_MAXBYTES
18	# define UTF8_MAXBYTES 13	20	# define UTF8_MAXBYTES 13
19	#endif	21	#endif
		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
		35	#define IVUV_MAXCHARS (sizeof (UV) * CHAR_BIT * 28 / 93 + 3)
20		36
21	#define F_ASCII 0x00000001UL	37	#define F_ASCII 0x00000001UL
22	#define F_LATIN1 0x00000002UL	38	#define F_LATIN1 0x00000002UL
23	#define F_UTF8 0x00000004UL	39	#define F_UTF8 0x00000004UL
24	#define F_INDENT 0x00000008UL	40	#define F_INDENT 0x00000008UL
…		…
27	#define F_SPACE_AFTER 0x00000040UL	43	#define F_SPACE_AFTER 0x00000040UL
28	#define F_ALLOW_NONREF 0x00000100UL	44	#define F_ALLOW_NONREF 0x00000100UL
29	#define F_SHRINK 0x00000200UL	45	#define F_SHRINK 0x00000200UL
30	#define F_ALLOW_BLESSED 0x00000400UL	46	#define F_ALLOW_BLESSED 0x00000400UL
31	#define F_CONV_BLESSED 0x00000800UL	47	#define F_CONV_BLESSED 0x00000800UL
32	#define F_MAXDEPTH 0xf8000000UL
33	#define S_MAXDEPTH 27
34	#define F_MAXSIZE 0x01f00000UL	48	#define F_RELAXED 0x00001000UL
35	#define S_MAXSIZE 20	49	#define F_ALLOW_UNKNOWN 0x00002000UL
		50	#define F_ALLOW_TAGS 0x00004000UL
36	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing	51	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
37		52
38	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
39	#define DEC_SIZE(flags) (1UL << ((flags & F_MAXSIZE ) >> S_MAXSIZE ))
40
41	#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER	53	#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER
42	#define F_DEFAULT (9UL << S_MAXDEPTH)
43		54
44	#define INIT_SIZE 32 // initial scalar size to be allocated	55	#define INIT_SIZE 32 // initial scalar size to be allocated
45	#define INDENT_STEP 3 // spaces per indentation level	56	#define INDENT_STEP 3 // spaces per indentation level
46		57
47	#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
48		59
		60	#define DECODE_WANTS_OCTETS(json) ((json)->flags & F_UTF8)
		61
49	#define SB do {	62	#define SB do {
50	#define SE } while (0)	63	#define SE } while (0)
51		64
52	#if __GNUC__ >= 3	65	#if __GNUC__ >= 3
53	# define expect(expr,value) __builtin_expect ((expr),(value))	66	# define expect(expr,value) __builtin_expect ((expr), (value))
54	# define inline inline	67	# define INLINE static inline
55	#else	68	#else
56	# define expect(expr,value) (expr)	69	# define expect(expr,value) (expr)
57	# define inline static	70	# define INLINE static
58	#endif	71	#endif
59		72
60	#define expect_false(expr) expect ((expr) != 0, 0)	73	#define expect_false(expr) expect ((expr) != 0, 0)
61	#define expect_true(expr) expect ((expr) != 0, 1)	74	#define expect_true(expr) expect ((expr) != 0, 1)
		75
		76	#define IN_RANGE_INC(type,val,beg,end) \
		77	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
		78	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
		79
		80	#define ERR_NESTING_EXCEEDED "json text or perl structure exceeds maximum nesting level (max_depth set too low?)"
62		81
63	#ifdef USE_ITHREADS	82	#ifdef USE_ITHREADS
64	# define JSON_SLOW 1	83	# define JSON_SLOW 1
65	# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1))	84	# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1))
		85	# define BOOL_STASH (bool_stash ? bool_stash : gv_stashpv ("Types::Serialiser::Boolean", 1))
66	#else	86	#else
67	# define JSON_SLOW 0	87	# define JSON_SLOW 0
68	# define JSON_STASH json_stash	88	# define JSON_STASH json_stash
		89	# define BOOL_STASH bool_stash
69	#endif	90	#endif
70		91
71	static HV *json_stash, *json_boolean_stash; // JSON::XS::	92	// the amount of HEs to allocate on the stack, when sorting keys
72	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_true, *bool_false, *sv_json;
		97
		98	enum {
		99	INCR_M_WS = 0, // initial whitespace skipping, must be 0
		100	INCR_M_STR, // inside string
		101	INCR_M_BS, // inside backslash
		102	INCR_M_C0, // inside comment in initial whitespace sequence
		103	INCR_M_C1, // inside comment in other places
		104	INCR_M_JSON // outside anything, count nesting
		105	};
		106
		107	#define INCR_DONE(json) ((json)->incr_nest <= 0 && (json)->incr_mode == INCR_M_JSON)
73		108
74	typedef struct {	109	typedef struct {
75	U32 flags;	110	U32 flags;
		111	U32 max_depth;
		112	STRLEN max_size;
		113
76	SV *cb_object;	114	SV *cb_object;
77	HV *cb_sk_object;	115	HV *cb_sk_object;
		116
		117	// for the incremental parser
		118	SV *incr_text; // the source text so far
		119	STRLEN incr_pos; // the current offset into the text
		120	int incr_nest; // {[]}-nesting level
		121	unsigned char incr_mode;
78	} JSON;	122	} JSON;
		123
		124	INLINE void
		125	json_init (JSON *json)
		126	{
		127	Zero (json, 1, JSON);
		128	json->max_depth = 512;
		129	}
79		130
80	/////////////////////////////////////////////////////////////////////////////	131	/////////////////////////////////////////////////////////////////////////////
81	// utility functions	132	// utility functions
82		133
83	inline void	134	INLINE SV *
		135	get_bool (const char *name)
		136	{
		137	SV *sv = get_sv (name, 1);
		138
		139	SvREADONLY_on (sv);
		140	SvREADONLY_on (SvRV (sv));
		141
		142	return sv;
		143	}
		144
		145	INLINE void
84	shrink (SV *sv)	146	shrink (SV *sv)
85	{	147	{
86	sv_utf8_downgrade (sv, 1);	148	sv_utf8_downgrade (sv, 1);
		149
87	if (SvLEN (sv) > SvCUR (sv) + 1)	150	if (SvLEN (sv) > SvCUR (sv) + 1)
88	{	151	{
89	#ifdef SvPV_shrink_to_cur	152	#ifdef SvPV_shrink_to_cur
90	SvPV_shrink_to_cur (sv);	153	SvPV_shrink_to_cur (sv);
91	#elif defined (SvPV_renew)	154	#elif defined (SvPV_renew)
92	SvPV_renew (sv, SvCUR (sv) + 1);	155	SvPV_renew (sv, SvCUR (sv) + 1);
93	#endif	156	#endif
94	}	157	}
95	}	158	}
96		159
		160	/* adds two STRLENs together, slow, and with paranoia */
		161	STRLEN
		162	strlen_sum (STRLEN l1, STRLEN l2)
		163	{
		164	size_t sum = l1 + l2;
		165
		166	if (sum < (size_t)l2 || sum != (size_t)(STRLEN)sum)
		167	croak ("JSON::XS: string size overflow");
		168
		169	return sum;
		170	}
		171
		172	/* similar to SvGROW, but somewhat safer and guarantees exponential realloc strategy */
		173	static char *
		174	json_sv_grow (SV *sv, size_t len1, size_t len2)
		175	{
		176	len1 = strlen_sum (len1, len2);
		177	len1 = strlen_sum (len1, len1 >> 1);
		178
		179	if (len1 > 4096 - 24)
		180	len1 = (len1 | 4095) - 24;
		181
		182	return SvGROW (sv, len1);
		183	}
		184
97	// decode an utf-8 character and return it, or (UV)-1 in	185	// decode an utf-8 character and return it, or (UV)-1 in
98	// case of an error.	186	// case of an error.
99	// we special-case "safe" characters from U+80 .. U+7FF,	187	// we special-case "safe" characters from U+80 .. U+7FF,
100	// but use the very good perl function to parse anything else.	188	// but use the very good perl function to parse anything else.
101	// note that we never call this function for a ascii codepoints	189	// note that we never call this function for a ascii codepoints
102	inline UV	190	INLINE UV
103	decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)	191	decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)
104	{	192	{
105	if (expect_false (s[0] > 0xdf || s[0] < 0xc2))	193	if (expect_true (len >= 2
106	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);	194	&& IN_RANGE_INC (char, s[0], 0xc2, 0xdf)
107	else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf)	195	&& IN_RANGE_INC (char, s[1], 0x80, 0xbf)))
108	{	196	{
109	*clen = 2;	197	*clen = 2;
110	return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);	198	return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);
111	}	199	}
112	else	200	else
		201	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);
		202	}
		203
		204	// likewise for encoding, also never called for ascii codepoints
		205	// this function takes advantage of this fact, although current gccs
		206	// seem to optimise the check for >= 0x80 away anyways
		207	INLINE unsigned char *
		208	encode_utf8 (unsigned char *s, UV ch)
		209	{
		210	if (expect_false (ch < 0x000080))
		211	*s++ = ch;
		212	else if (expect_true (ch < 0x000800))
		213	*s++ = 0xc0 | ( ch >> 6),
		214	*s++ = 0x80 | ( ch & 0x3f);
		215	else if ( ch < 0x010000)
		216	*s++ = 0xe0 | ( ch >> 12),
		217	*s++ = 0x80 | ((ch >> 6) & 0x3f),
		218	*s++ = 0x80 | ( ch & 0x3f);
		219	else if ( ch < 0x110000)
		220	*s++ = 0xf0 | ( ch >> 18),
		221	*s++ = 0x80 | ((ch >> 12) & 0x3f),
		222	*s++ = 0x80 | ((ch >> 6) & 0x3f),
		223	*s++ = 0x80 | ( ch & 0x3f);
		224
		225	return s;
		226	}
		227
		228	// convert offset pointer to character index, sv must be string
		229	static STRLEN
		230	ptr_to_index (SV *sv, char *offset)
		231	{
		232	return SvUTF8 (sv)
		233	? utf8_distance (offset, SvPVX (sv))
		234	: offset - SvPVX (sv);
		235	}
		236
		237	/////////////////////////////////////////////////////////////////////////////
		238	// fp hell
		239
		240	// scan a group of digits, and a trailing exponent
		241	static void
		242	json_atof_scan1 (const char *s, NV *accum, int *expo, int postdp, int maxdepth)
		243	{
		244	UV uaccum = 0;
		245	int eaccum = 0;
		246
		247	// if we recurse too deep, skip all remaining digits
		248	// to avoid a stack overflow attack
		249	if (expect_false (--maxdepth <= 0))
		250	while (((U8)*s - '0') < 10)
		251	++s;
		252
		253	for (;;)
		254	{
		255	U8 dig = (U8)*s - '0';
		256
		257	if (expect_false (dig >= 10))
		258	{
		259	if (dig == (U8)((U8)'.' - (U8)'0'))
		260	{
		261	++s;
		262	json_atof_scan1 (s, accum, expo, 1, maxdepth);
		263	}
		264	else if ((dig | ' ') == 'e' - '0')
		265	{
		266	int exp2 = 0;
		267	int neg = 0;
		268
		269	++s;
		270
		271	if (*s == '-')
		272	{
		273	++s;
		274	neg = 1;
		275	}
		276	else if (*s == '+')
		277	++s;
		278
		279	while ((dig = (U8)*s - '0') < 10)
		280	exp2 = exp2 * 10 + *s++ - '0';
		281
		282	*expo += neg ? -exp2 : exp2;
		283	}
		284
		285	break;
		286	}
		287
		288	++s;
		289
		290	uaccum = uaccum * 10 + dig;
		291	++eaccum;
		292
		293	// if we have too many digits, then recurse for more
		294	// we actually do this for rather few digits
		295	if (uaccum >= (UV_MAX - 9) / 10)
		296	{
		297	if (postdp) *expo -= eaccum;
		298	json_atof_scan1 (s, accum, expo, postdp, maxdepth);
		299	if (postdp) *expo += eaccum;
		300
		301	break;
		302	}
113	{	303	}
114	*clen = (STRLEN)-1;	304
		305	// this relies greatly on the quality of the pow ()
		306	// implementation of the platform, but a good
		307	// implementation is hard to beat.
		308	// (IEEE 754 conformant ones are required to be exact)
		309	if (postdp) *expo -= eaccum;
		310	*accum += uaccum * Perl_pow (10., *expo);
		311	*expo += eaccum;
		312	}
		313
		314	static NV
		315	json_atof (const char *s)
		316	{
		317	NV accum = 0.;
		318	int expo = 0;
		319	int neg = 0;
		320
		321	if (*s == '-')
		322	{
		323	++s;
		324	neg = 1;
		325	}
		326
		327	// a recursion depth of ten gives us >>500 bits
		328	json_atof_scan1 (s, &accum, &expo, 0, 10);
		329
		330	return neg ? -accum : accum;
		331	}
		332
		333	// target of scalar reference is bool? -1 == nope, 0 == false, 1 == true
		334	static int
		335	ref_bool_type (SV *sv)
		336	{
		337	svtype svt = SvTYPE (sv);
		338
		339	if (svt < SVt_PVAV)
		340	{
		341	STRLEN len = 0;
		342	char *pv = svt ? SvPV (sv, len) : 0;
		343
		344	if (len == 1)
		345	if (*pv == '1')
		346	return 1;
		347	else if (*pv == '0')
		348	return 0;
		349	}
		350
		351	return -1;
		352	}
		353
		354	// returns whether scalar is not a reference in the sense of allow_nonref
		355	static int
		356	json_nonref (SV *scalar)
		357	{
		358	if (!SvROK (scalar))
		359	return 1;
		360
		361	scalar = SvRV (scalar);
		362
		363	if (SvTYPE (scalar) >= SVt_PVMG)
		364	{
		365	if (SvSTASH (scalar) == bool_stash)
115	return (UV)-1;	366	return 1;
		367
		368	if (!SvOBJECT (scalar) && ref_bool_type (scalar) >= 0)
		369	return 1;
116	}	370	}
		371
		372	return 0;
117	}	373	}
118		374
119	/////////////////////////////////////////////////////////////////////////////	375	/////////////////////////////////////////////////////////////////////////////
120	// encoder	376	// encoder
121		377
…		…
125	char *cur; // SvPVX (sv) + current output position	381	char *cur; // SvPVX (sv) + current output position
126	char *end; // SvEND (sv)	382	char *end; // SvEND (sv)
127	SV *sv; // result scalar	383	SV *sv; // result scalar
128	JSON json;	384	JSON json;
129	U32 indent; // indentation level	385	U32 indent; // indentation level
130	U32 maxdepth; // max. indentation/recursion level	386	UV limit; // escape character values >= this value when encoding
131	} enc_t;	387	} enc_t;
132		388
133	inline void	389	INLINE void
134	need (enc_t *enc, STRLEN len)	390	need (enc_t *enc, STRLEN len)
135	{	391	{
136	if (expect_false (enc->cur + len >= enc->end))	392	if (expect_false ((uintptr_t)(enc->end - enc->cur) < len))
137	{	393	{
138	STRLEN cur = enc->cur - SvPVX (enc->sv);	394	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
139	SvGROW (enc->sv, cur + len + 1);	395	char *buf = json_sv_grow (enc->sv, cur, len);
140	enc->cur = SvPVX (enc->sv) + cur;	396	enc->cur = buf + cur;
141	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	397	enc->end = buf + SvLEN (enc->sv) - 1;
142	}	398	}
143	}	399	}
144		400
145	inline void	401	INLINE void
146	encode_ch (enc_t *enc, char ch)	402	encode_ch (enc_t *enc, char ch)
147	{	403	{
148	need (enc, 1);	404	need (enc, 1);
149	*enc->cur++ = ch;	405	*enc->cur++ = ch;
150	}	406	}
…		…
162		418
163	if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case	419	if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case
164	{	420	{
165	if (expect_false (ch == '"')) // but with slow exceptions	421	if (expect_false (ch == '"')) // but with slow exceptions
166	{	422	{
167	need (enc, len += 1);	423	need (enc, len + 1);
168	*enc->cur++ = '\\';	424	*enc->cur++ = '\\';
169	*enc->cur++ = '"';	425	*enc->cur++ = '"';
170	}	426	}
171	else if (expect_false (ch == '\\'))	427	else if (expect_false (ch == '\\'))
172	{	428	{
173	need (enc, len += 1);	429	need (enc, len + 1);
174	*enc->cur++ = '\\';	430	*enc->cur++ = '\\';
175	*enc->cur++ = '\\';	431	*enc->cur++ = '\\';
176	}	432	}
177	else	433	else
178	*enc->cur++ = ch;	434	*enc->cur++ = ch;
…		…
181	}	437	}
182	else	438	else
183	{	439	{
184	switch (ch)	440	switch (ch)
185	{	441	{
186	case '\010': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'b'; ++str; break;	442	case '\010': need (enc, len + 1); *enc->cur++ = '\\'; *enc->cur++ = 'b'; ++str; break;
187	case '\011': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 't'; ++str; break;	443	case '\011': need (enc, len + 1); *enc->cur++ = '\\'; *enc->cur++ = 't'; ++str; break;
188	case '\012': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'n'; ++str; break;	444	case '\012': need (enc, len + 1); *enc->cur++ = '\\'; *enc->cur++ = 'n'; ++str; break;
189	case '\014': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'f'; ++str; break;	445	case '\014': need (enc, len + 1); *enc->cur++ = '\\'; *enc->cur++ = 'f'; ++str; break;
190	case '\015': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'r'; ++str; break;	446	case '\015': need (enc, len + 1); *enc->cur++ = '\\'; *enc->cur++ = 'r'; ++str; break;
191		447
192	default:	448	default:
193	{	449	{
194	STRLEN clen;	450	STRLEN clen;
195	UV uch;	451	UV uch;
…		…
204	{	460	{
205	uch = ch;	461	uch = ch;
206	clen = 1;	462	clen = 1;
207	}	463	}
208		464
209	if (uch > 0x10FFFFUL)	465	if (uch < 0x80/*0x20*/ || uch >= enc->limit)
210	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
211
212	if (uch < 0x80 || enc->json.flags & F_ASCII || (enc->json.flags & F_LATIN1 && uch > 0xFF))
213	{	466	{
214	if (uch > 0xFFFFUL)	467	if (uch >= 0x10000UL)
215	{	468	{
		469	if (uch >= 0x110000UL)
		470	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
		471
216	need (enc, len += 11);	472	need (enc, len + 11);
217	sprintf (enc->cur, "\\u%04x\\u%04x",	473	sprintf (enc->cur, "\\u%04x\\u%04x",
218	(int)((uch - 0x10000) / 0x400 + 0xD800),	474	(int)((uch - 0x10000) / 0x400 + 0xD800),
219	(int)((uch - 0x10000) % 0x400 + 0xDC00));	475	(int)((uch - 0x10000) % 0x400 + 0xDC00));
220	enc->cur += 12;	476	enc->cur += 12;
221	}	477	}
222	else	478	else
223	{	479	{
224	static char hexdigit [16] = "0123456789abcdef";
225	need (enc, len += 5);	480	need (enc, len + 5);
226	*enc->cur++ = '\\';	481	*enc->cur++ = '\\';
227	*enc->cur++ = 'u';	482	*enc->cur++ = 'u';
228	*enc->cur++ = hexdigit [ uch >> 12 ];	483	*enc->cur++ = PL_hexdigit [ uch >> 12 ];
229	*enc->cur++ = hexdigit [(uch >> 8) & 15];	484	*enc->cur++ = PL_hexdigit [(uch >> 8) & 15];
230	*enc->cur++ = hexdigit [(uch >> 4) & 15];	485	*enc->cur++ = PL_hexdigit [(uch >> 4) & 15];
231	*enc->cur++ = hexdigit [(uch >> 0) & 15];	486	*enc->cur++ = PL_hexdigit [(uch >> 0) & 15];
232	}	487	}
233		488
234	str += clen;	489	str += clen;
235	}	490	}
236	else if (enc->json.flags & F_LATIN1)	491	else if (enc->json.flags & F_LATIN1)
…		…
238	*enc->cur++ = uch;	493	*enc->cur++ = uch;
239	str += clen;	494	str += clen;
240	}	495	}
241	else if (is_utf8)	496	else if (is_utf8)
242	{	497	{
243	need (enc, len += clen);	498	need (enc, len + clen);
244	do	499	do
245	{	500	{
246	*enc->cur++ = *str++;	501	*enc->cur++ = *str++;
247	}	502	}
248	while (--clen);	503	while (--clen);
249	}	504	}
250	else	505	else
251	{	506	{
252	need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed	507	need (enc, len + UTF8_MAXBYTES - 1); // never more than 11 bytes needed
253	enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0);	508	enc->cur = encode_utf8 (enc->cur, uch);
254	++str;	509	++str;
255	}	510	}
256	}	511	}
257	}	512	}
258	}	513	}
259		514
260	--len;	515	--len;
261	}	516	}
262	}	517	}
263		518
264	inline void	519	INLINE void
265	encode_indent (enc_t *enc)	520	encode_indent (enc_t *enc)
266	{	521	{
267	if (enc->json.flags & F_INDENT)	522	if (enc->json.flags & F_INDENT)
268	{	523	{
269	int spaces = enc->indent * INDENT_STEP;	524	int spaces = enc->indent * INDENT_STEP;
…		…
272	memset (enc->cur, ' ', spaces);	527	memset (enc->cur, ' ', spaces);
273	enc->cur += spaces;	528	enc->cur += spaces;
274	}	529	}
275	}	530	}
276		531
277	inline void	532	INLINE void
278	encode_space (enc_t *enc)	533	encode_space (enc_t *enc)
279	{	534	{
280	need (enc, 1);	535	need (enc, 1);
281	encode_ch (enc, ' ');	536	encode_ch (enc, ' ');
282	}	537	}
283		538
284	inline void	539	INLINE void
285	encode_nl (enc_t *enc)	540	encode_nl (enc_t *enc)
286	{	541	{
287	if (enc->json.flags & F_INDENT)	542	if (enc->json.flags & F_INDENT)
288	{	543	{
289	need (enc, 1);	544	need (enc, 1);
290	encode_ch (enc, '\n');	545	encode_ch (enc, '\n');
291	}	546	}
292	}	547	}
293		548
294	inline void	549	INLINE void
295	encode_comma (enc_t *enc)	550	encode_comma (enc_t *enc)
296	{	551	{
297	encode_ch (enc, ',');	552	encode_ch (enc, ',');
298		553
299	if (enc->json.flags & F_INDENT)	554	if (enc->json.flags & F_INDENT)
…		…
307	static void	562	static void
308	encode_av (enc_t *enc, AV *av)	563	encode_av (enc_t *enc, AV *av)
309	{	564	{
310	int i, len = av_len (av);	565	int i, len = av_len (av);
311		566
312	if (enc->indent >= enc->maxdepth)	567	if (enc->indent >= enc->json.max_depth)
313	croak ("data structure too deep (hit recursion limit)");	568	croak (ERR_NESTING_EXCEEDED);
314		569
315	encode_ch (enc, '['); encode_nl (enc);	570	encode_ch (enc, '[');
316	++enc->indent;
317		571
		572	if (len >= 0)
		573	{
		574	encode_nl (enc); ++enc->indent;
		575
318	for (i = 0; i <= len; ++i)	576	for (i = 0; i <= len; ++i)
319	{	577	{
320	SV **svp = av_fetch (av, i, 0);	578	SV **svp = av_fetch (av, i, 0);
321		579
322	encode_indent (enc);	580	encode_indent (enc);
323		581
324	if (svp)	582	if (svp)
325	encode_sv (enc, *svp);	583	encode_sv (enc, *svp);
326	else	584	else
327	encode_str (enc, "null", 4, 0);	585	encode_str (enc, "null", 4, 0);
328		586
329	if (i < len)	587	if (i < len)
330	encode_comma (enc);	588	encode_comma (enc);
331	}	589	}
332		590
		591	encode_nl (enc); --enc->indent; encode_indent (enc);
		592	}
		593
333	encode_nl (enc);	594	encode_ch (enc, ']');
334
335	--enc->indent;
336	encode_indent (enc); encode_ch (enc, ']');
337	}	595	}
338		596
339	static void	597	static void
340	encode_he (enc_t *enc, HE *he)	598	encode_hk (enc_t *enc, HE *he)
341	{	599	{
342	encode_ch (enc, '"');	600	encode_ch (enc, '"');
343		601
344	if (HeKLEN (he) == HEf_SVKEY)	602	if (HeKLEN (he) == HEf_SVKEY)
345	{	603	{
346	SV *sv = HeSVKEY (he);	604	SV *sv = HeSVKEY (he);
347	STRLEN len;	605	STRLEN len;
348	char *str;	606	char *str;
349		607
350	SvGETMAGIC (sv);	608	SvGETMAGIC (sv);
351	str = SvPV (sv, len);	609	str = SvPV (sv, len);
352		610
353	encode_str (enc, str, len, SvUTF8 (sv));	611	encode_str (enc, str, len, SvUTF8 (sv));
354	}	612	}
…		…
358	encode_ch (enc, '"');	616	encode_ch (enc, '"');
359		617
360	if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);	618	if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);
361	encode_ch (enc, ':');	619	encode_ch (enc, ':');
362	if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);	620	if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);
363	encode_sv (enc, HeVAL (he));
364	}	621	}
365		622
366	// compare hash entries, used when all keys are bytestrings	623	// compare hash entries, used when all keys are bytestrings
367	static int	624	static int
368	he_cmp_fast (const void *a_, const void *b_)	625	he_cmp_fast (const void *a_, const void *b_)
…		…
373	HE *b = *(HE **)b_;	630	HE *b = *(HE **)b_;
374		631
375	STRLEN la = HeKLEN (a);	632	STRLEN la = HeKLEN (a);
376	STRLEN lb = HeKLEN (b);	633	STRLEN lb = HeKLEN (b);
377		634
378	if (!(cmp = memcmp (HeKEY (a), HeKEY (b), la < lb ? la : lb)))	635	if (!(cmp = memcmp (HeKEY (b), HeKEY (a), lb < la ? lb : la)))
379	cmp = la - lb;	636	cmp = lb - la;
380		637
381	return cmp;	638	return cmp;
382	}	639	}
383		640
384	// compare hash entries, used when some keys are sv's or utf-x	641	// compare hash entries, used when some keys are sv's or utf-x
385	static int	642	static int
386	he_cmp_slow (const void *a, const void *b)	643	he_cmp_slow (const void *a, const void *b)
387	{	644	{
388	return sv_cmp (HeSVKEY_force (*(HE **)a), HeSVKEY_force (*(HE **)b));	645	return sv_cmp (HeSVKEY_force (*(HE **)b), HeSVKEY_force (*(HE **)a));
389	}	646	}
390		647
391	static void	648	static void
392	encode_hv (enc_t *enc, HV *hv)	649	encode_hv (enc_t *enc, HV *hv)
393	{	650	{
394	int count, i;	651	HE *he;
395		652
396	if (enc->indent >= enc->maxdepth)	653	if (enc->indent >= enc->json.max_depth)
397	croak ("data structure too deep (hit recursion limit)");	654	croak (ERR_NESTING_EXCEEDED);
398		655
399	encode_ch (enc, '{'); encode_nl (enc); ++enc->indent;	656	encode_ch (enc, '{');
400		657
401	if ((count = hv_iterinit (hv)))
402	{
403	// for canonical output we have to sort by keys first	658	// for canonical output we have to sort by keys first
404	// actually, this is mostly due to the stupid so-called	659	// actually, this is mostly due to the stupid so-called
405	// security workaround added somewhere in 5.8.x.	660	// security workaround added somewhere in 5.8.x
406	// that randomises hash orderings	661	// that randomises hash orderings
407	if (enc->json.flags & F_CANONICAL)	662	if (enc->json.flags & F_CANONICAL && !SvRMAGICAL (hv))
		663	{
		664	int count = hv_iterinit (hv);
		665
		666	if (SvMAGICAL (hv))
408	{	667	{
		668	// need to count by iterating. could improve by dynamically building the vector below
		669	// but I don't care for the speed of this special case.
		670	// note also that we will run into undefined behaviour when the two iterations
		671	// do not result in the same count, something I might care for in some later release.
		672
		673	count = 0;
		674	while (hv_iternext (hv))
		675	++count;
		676
		677	hv_iterinit (hv);
		678	}
		679
		680	if (count)
		681	{
409	int fast = 1;	682	int i, fast = 1;
410	HE *he;	683	HE *hes_stack [STACK_HES];
411	#if defined(__BORLANDC__) || defined(_MSC_VER)	684	HE **hes = hes_stack;
412	HE **hes = _alloca (count * sizeof (HE));	685
413	#else	686	// allocate larger arrays on the heap
414	HE *hes [count]; // if your compiler dies here, you need to enable C99 mode	687	if (count > STACK_HES)
415	#endif	688	{
		689	SV *sv = sv_2mortal (NEWSV (0, count * sizeof (*hes)));
		690	hes = (HE **)SvPVX (sv);
		691	}
416		692
417	i = 0;	693	i = 0;
418	while ((he = hv_iternext (hv)))	694	while ((he = hv_iternext (hv)))
419	{	695	{
420	hes [i++] = he;	696	hes [i++] = he;
…		…
442		718
443	FREETMPS;	719	FREETMPS;
444	LEAVE;	720	LEAVE;
445	}	721	}
446		722
447	for (i = 0; i < count; ++i)	723	encode_nl (enc); ++enc->indent;
		724
		725	while (count--)
448	{	726	{
449	encode_indent (enc);	727	encode_indent (enc);
		728	he = hes [count];
450	encode_he (enc, hes [i]);	729	encode_hk (enc, he);
		730	encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
451		731
452	if (i < count - 1)	732	if (count)
453	encode_comma (enc);	733	encode_comma (enc);
454	}	734	}
455		735
456	encode_nl (enc);	736	encode_nl (enc); --enc->indent; encode_indent (enc);
457	}	737	}
		738	}
458	else	739	else
		740	{
		741	if (hv_iterinit (hv) || SvMAGICAL (hv))
		742	if ((he = hv_iternext (hv)))
459	{	743	{
460	HE *he = hv_iternext (hv);	744	encode_nl (enc); ++enc->indent;
461		745
462	for (;;)	746	for (;;)
463	{	747	{
464	encode_indent (enc);	748	encode_indent (enc);
465	encode_he (enc, he);	749	encode_hk (enc, he);
		750	encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
466		751
467	if (!(he = hv_iternext (hv)))	752	if (!(he = hv_iternext (hv)))
468	break;	753	break;
469		754
470	encode_comma (enc);	755	encode_comma (enc);
471	}	756	}
472		757
473	encode_nl (enc);	758	encode_nl (enc); --enc->indent; encode_indent (enc);
474	}	759	}
475	}	760	}
476		761
477	--enc->indent; encode_indent (enc); encode_ch (enc, '}');	762	encode_ch (enc, '}');
478	}	763	}
479		764
480	// encode objects, arrays and special \0=false and \1=true values.	765	// encode objects, arrays and special \0=false and \1=true values.
481	static void	766	static void
482	encode_rv (enc_t *enc, SV *sv)	767	encode_rv (enc_t *enc, SV *sv)
483	{	768	{
484	svtype svt;	769	svtype svt;
		770	GV *method;
485		771
486	SvGETMAGIC (sv);	772	SvGETMAGIC (sv);
487	svt = SvTYPE (sv);	773	svt = SvTYPE (sv);
488		774
489	if (expect_false (SvOBJECT (sv)))	775	if (expect_false (SvOBJECT (sv)))
490	{	776	{
491	HV *stash = !JSON_SLOW || json_boolean_stash	777	HV *stash = SvSTASH (sv);
492	? json_boolean_stash
493	: gv_stashpv ("JSON::XS::Boolean", 1);
494		778
495	if (SvSTASH (sv) == stash)	779	if (stash == bool_stash)
496	{	780	{
497	if (SvIV (sv))	781	if (SvIV (sv))
498	encode_str (enc, "true", 4, 0);	782	encode_str (enc, "true", 4, 0);
499	else	783	else
500	encode_str (enc, "false", 5, 0);	784	encode_str (enc, "false", 5, 0);
501	}	785	}
		786	else if ((enc->json.flags & F_ALLOW_TAGS) && (method = gv_fetchmethod_autoload (stash, "FREEZE", 0)))
		787	{
		788	int count;
		789	dSP;
		790
		791	ENTER; SAVETMPS;
		792	SAVESTACK_POS ();
		793	PUSHMARK (SP);
		794	EXTEND (SP, 2);
		795	// we re-bless the reference to get overload and other niceties right
		796	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		797	PUSHs (sv_json);
		798
		799	PUTBACK;
		800	count = call_sv ((SV *)GvCV (method), G_ARRAY);
		801	SPAGAIN;
		802
		803	// catch this surprisingly common error
		804	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		805	croak ("%s::FREEZE method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		806
		807	encode_ch (enc, '(');
		808	encode_ch (enc, '"');
		809	encode_str (enc, HvNAME (stash), HvNAMELEN (stash), HvNAMEUTF8 (stash));
		810	encode_ch (enc, '"');
		811	encode_ch (enc, ')');
		812	encode_ch (enc, '[');
		813
		814	while (count)
		815	{
		816	encode_sv (enc, SP[1 - count--]);
		817
		818	if (count)
		819	encode_ch (enc, ',');
		820	}
		821
		822	encode_ch (enc, ']');
		823
		824	FREETMPS; LEAVE;
		825	}
		826	else if ((enc->json.flags & F_CONV_BLESSED) && (method = gv_fetchmethod_autoload (stash, "TO_JSON", 0)))
		827	{
		828	dSP;
		829
		830	ENTER; SAVETMPS;
		831	PUSHMARK (SP);
		832	// we re-bless the reference to get overload and other niceties right
		833	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		834
		835	// calling with G_SCALAR ensures that we always get a 1 return value
		836	PUTBACK;
		837	call_sv ((SV *)GvCV (method), G_SCALAR);
		838	SPAGAIN;
		839
		840	// catch this surprisingly common error
		841	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		842	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		843
		844	sv = POPs;
		845	PUTBACK;
		846
		847	encode_sv (enc, sv);
		848
		849	FREETMPS; LEAVE;
		850	}
		851	else if (enc->json.flags & F_ALLOW_BLESSED)
		852	encode_str (enc, "null", 4, 0);
502	else	853	else
503	{
504	#if 0
505	if (0 && sv_derived_from (rv, "JSON::Literal"))
506	{
507	// not yet
508	}
509	#endif
510	if (enc->json.flags & F_CONV_BLESSED)
511	{
512	// we re-bless the reference to get overload and other niceties right
513	GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 0);
514
515	if (to_json)
516	{
517	dSP;
518
519	ENTER; SAVETMPS; PUSHMARK (SP);
520	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
521
522	// calling with G_SCALAR ensures that we always get a 1 return value
523	PUTBACK;
524	call_sv ((SV *)GvCV (to_json), G_SCALAR);
525	SPAGAIN;
526
527	// catch this surprisingly common error
528	if (SvROK (TOPs) && SvRV (TOPs) == sv)
529	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
530
531	sv = POPs;
532	PUTBACK;
533
534	encode_sv (enc, sv);
535
536	FREETMPS; LEAVE;
537	}
538	else if (enc->json.flags & F_ALLOW_BLESSED)
539	encode_str (enc, "null", 4, 0);
540	else
541	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
542	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
543	}
544	else if (enc->json.flags & F_ALLOW_BLESSED)
545	encode_str (enc, "null", 4, 0);
546	else
547	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	854	croak ("encountered object '%s', but neither allow_blessed, convert_blessed nor allow_tags settings are enabled (or TO_JSON/FREEZE method missing)",
548	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	855	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
549	}
550	}	856	}
551	else if (svt == SVt_PVHV)	857	else if (svt == SVt_PVHV)
552	encode_hv (enc, (HV *)sv);	858	encode_hv (enc, (HV *)sv);
553	else if (svt == SVt_PVAV)	859	else if (svt == SVt_PVAV)
554	encode_av (enc, (AV *)sv);	860	encode_av (enc, (AV *)sv);
555	else if (svt < SVt_PVAV)	861	else if (svt < SVt_PVAV)
556	{	862	{
557	STRLEN len = 0;	863	int bool_type = ref_bool_type (sv);
558	char *pv = svt ? SvPV (sv, len) : 0;
559		864
560	if (len == 1 && *pv == '1')	865	if (bool_type == 1)
561	encode_str (enc, "true", 4, 0);	866	encode_str (enc, "true", 4, 0);
562	else if (len == 1 && *pv == '0')	867	else if (bool_type == 0)
563	encode_str (enc, "false", 5, 0);	868	encode_str (enc, "false", 5, 0);
		869	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		870	encode_str (enc, "null", 4, 0);
564	else	871	else
565	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",	872	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
566	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	873	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
567	}	874	}
		875	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		876	encode_str (enc, "null", 4, 0);
568	else	877	else
569	croak ("encountered %s, but JSON can only represent references to arrays or hashes",	878	croak ("encountered %s, but JSON can only represent references to arrays or hashes",
570	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	879	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
571	}	880	}
572		881
…		…
590	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);	899	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
591	enc->cur += strlen (enc->cur);	900	enc->cur += strlen (enc->cur);
592	}	901	}
593	else if (SvIOKp (sv))	902	else if (SvIOKp (sv))
594	{	903	{
595	// we assume we can always read an IV as a UV	904	// we assume we can always read an IV as a UV and vice versa
596	if (SvUV (sv) & ~(UV)0x7fff)	905	// we assume two's complement
597	{	906	// we assume no aliasing issues in the union
598	// large integer, use the (rather slow) snprintf way.	907	if (SvIsUV (sv) ? SvUVX (sv) <= 59000
599	need (enc, sizeof (UV) * 3);	908	: SvIVX (sv) <= 59000 && SvIVX (sv) >= -59000)
600	enc->cur +=
601	SvIsUV(sv)
602	? snprintf (enc->cur, sizeof (UV) * 3, "%"UVuf, (UV)SvUVX (sv))
603	: snprintf (enc->cur, sizeof (UV) * 3, "%"IVdf, (IV)SvIVX (sv));
604	}
605	else
606	{	909	{
607	// optimise the "small number case"	910	// optimise the "small number case"
608	// code will likely be branchless and use only a single multiplication	911	// code will likely be branchless and use only a single multiplication
		912	// works for numbers up to 59074
609	I32 i = SvIV (sv);	913	I32 i = SvIVX (sv);
610	U32 u;	914	U32 u;
611	char digit, nz = 0;	915	char digit, nz = 0;
612		916
613	need (enc, 6);	917	need (enc, 6);
614		918
…		…
620		924
621	// now output digit by digit, each time masking out the integer part	925	// now output digit by digit, each time masking out the integer part
622	// and multiplying by 5 while moving the decimal point one to the right,	926	// and multiplying by 5 while moving the decimal point one to the right,
623	// resulting in a net multiplication by 10.	927	// resulting in a net multiplication by 10.
624	// we always write the digit to memory but conditionally increment	928	// we always write the digit to memory but conditionally increment
625	// the pointer, to ease the usage of conditional move instructions.	929	// the pointer, to enable the use of conditional move instructions.
626	digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffff) * 5;	930	digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffffUL) * 5;
627	digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffff) * 5;	931	digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffffUL) * 5;
628	digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffff) * 5;	932	digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffffUL) * 5;
629	digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffff) * 5;	933	digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffffUL) * 5;
630	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'	934	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
631	}	935	}
		936	else
		937	{
		938	// large integer, use the (rather slow) snprintf way.
		939	need (enc, IVUV_MAXCHARS);
		940	enc->cur +=
		941	SvIsUV(sv)
		942	? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv))
		943	: snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv));
		944	}
632	}	945	}
633	else if (SvROK (sv))	946	else if (SvROK (sv))
634	encode_rv (enc, SvRV (sv));	947	encode_rv (enc, SvRV (sv));
635	else if (!SvOK (sv))	948	else if (!SvOK (sv) || enc->json.flags & F_ALLOW_UNKNOWN)
636	encode_str (enc, "null", 4, 0);	949	encode_str (enc, "null", 4, 0);
637	else	950	else
638	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",	951	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, check your input data",
639	SvPV_nolen (sv), SvFLAGS (sv));	952	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
640	}	953	}
641		954
642	static SV *	955	static SV *
643	encode_json (SV *scalar, JSON *json)	956	encode_json (SV *scalar, JSON *json)
644	{	957	{
645	enc_t enc;	958	enc_t enc;
646		959
647	if (!(json->flags & F_ALLOW_NONREF) && !SvROK (scalar))	960	if (!(json->flags & F_ALLOW_NONREF) && json_nonref (scalar))
648	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");	961	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
649		962
650	enc.json = *json;	963	enc.json = *json;
651	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	964	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
652	enc.cur = SvPVX (enc.sv);	965	enc.cur = SvPVX (enc.sv);
653	enc.end = SvEND (enc.sv);	966	enc.end = SvEND (enc.sv);
654	enc.indent = 0;	967	enc.indent = 0;
655	enc.maxdepth = DEC_DEPTH (enc.json.flags);	968	enc.limit = enc.json.flags & F_ASCII ? 0x000080UL
		969	: enc.json.flags & F_LATIN1 ? 0x000100UL
		970	: 0x110000UL;
656		971
657	SvPOK_only (enc.sv);	972	SvPOK_only (enc.sv);
658	encode_sv (&enc, scalar);	973	encode_sv (&enc, scalar);
		974	encode_nl (&enc);
659		975
660	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	976	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
661	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	977	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
662		978
663	if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8)))	979	if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8)))
…		…
681	JSON json;	997	JSON json;
682	U32 depth; // recursion depth	998	U32 depth; // recursion depth
683	U32 maxdepth; // recursion depth limit	999	U32 maxdepth; // recursion depth limit
684	} dec_t;	1000	} dec_t;
685		1001
686	inline void	1002	INLINE void
		1003	decode_comment (dec_t *dec)
		1004	{
		1005	// only '#'-style comments allowed a.t.m.
		1006
		1007	while (*dec->cur && *dec->cur != 0x0a && *dec->cur != 0x0d)
		1008	++dec->cur;
		1009	}
		1010
		1011	INLINE void
687	decode_ws (dec_t *dec)	1012	decode_ws (dec_t *dec)
688	{	1013	{
689	for (;;)	1014	for (;;)
690	{	1015	{
691	char ch = *dec->cur;	1016	char ch = *dec->cur;
692		1017
693	if (ch > 0x20	1018	if (ch > 0x20)
		1019	{
		1020	if (expect_false (ch == '#'))
		1021	{
		1022	if (dec->json.flags & F_RELAXED)
		1023	decode_comment (dec);
		1024	else
		1025	break;
		1026	}
		1027	else
		1028	break;
		1029	}
694	|| (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09))	1030	else if (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)
695	break;	1031	break; // parse error, but let higher level handle it, gives better error messages
696		1032
697	++dec->cur;	1033	++dec->cur;
698	}	1034	}
699	}	1035	}
700		1036
…		…
704	if (*dec->cur != ch) \	1040	if (*dec->cur != ch) \
705	ERR (# ch " expected"); \	1041	ERR (# ch " expected"); \
706	++dec->cur; \	1042	++dec->cur; \
707	SE	1043	SE
708		1044
709	#define DEC_INC_DEPTH if (++dec->depth > dec->maxdepth) ERR ("json datastructure exceeds maximum nesting level (set a higher max_depth)")	1045	#define DEC_INC_DEPTH if (++dec->depth > dec->json.max_depth) ERR (ERR_NESTING_EXCEEDED)
710	#define DEC_DEC_DEPTH --dec->depth	1046	#define DEC_DEC_DEPTH --dec->depth
711		1047
712	static SV *decode_sv (dec_t *dec);	1048	static SV *decode_sv (dec_t *dec);
713		1049
714	static signed char decode_hexdigit[256];	1050	static signed char decode_hexdigit[256];
…		…
806		1142
807	if (hi >= 0x80)	1143	if (hi >= 0x80)
808	{	1144	{
809	utf8 = 1;	1145	utf8 = 1;
810		1146
811	cur = (char *)uvuni_to_utf8_flags (cur, hi, 0);	1147	cur = encode_utf8 (cur, hi);
812	}	1148	}
813	else	1149	else
814	*cur++ = hi;	1150	*cur++ = hi;
815	}	1151	}
816	break;	1152	break;
…		…
818	default:	1154	default:
819	--dec_cur;	1155	--dec_cur;
820	ERR ("illegal backslash escape sequence in string");	1156	ERR ("illegal backslash escape sequence in string");
821	}	1157	}
822	}	1158	}
823	else if (expect_true (ch >= 0x20 && ch <= 0x7f))	1159	else if (expect_true (ch >= 0x20 && ch < 0x80))
824	*cur++ = ch;	1160	*cur++ = ch;
825	else if (ch >= 0x80)	1161	else if (ch >= 0x80)
826	{	1162	{
827	STRLEN clen;	1163	STRLEN clen;
828	UV uch;
829		1164
830	--dec_cur;	1165	--dec_cur;
831		1166
832	uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen);	1167	decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
833	if (clen == (STRLEN)-1)	1168	if (clen == (STRLEN)-1)
834	ERR ("malformed UTF-8 character in JSON string");	1169	ERR ("malformed UTF-8 character in JSON string");
835		1170
836	do	1171	do
837	*cur++ = *dec_cur++;	1172	*cur++ = *dec_cur++;
838	while (--clen);	1173	while (--clen);
839		1174
840	utf8 = 1;	1175	utf8 = 1;
841	}	1176	}
		1177	else if (ch == '\t' && dec->json.flags & F_RELAXED)
		1178	*cur++ = ch;
842	else	1179	else
843	{	1180	{
844	--dec_cur;	1181	--dec_cur;
845		1182
846	if (!ch)	1183	if (!ch)
…		…
854	{	1191	{
855	STRLEN len = cur - buf;	1192	STRLEN len = cur - buf;
856		1193
857	if (sv)	1194	if (sv)
858	{	1195	{
859	SvGROW (sv, SvCUR (sv) + len + 1);	1196	STRLEN cur = SvCUR (sv);
		1197
		1198	if (SvLEN (sv) - cur <= len)
		1199	json_sv_grow (sv, cur, len);
		1200
860	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);	1201	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);
861	SvCUR_set (sv, SvCUR (sv) + len);	1202	SvCUR_set (sv, SvCUR (sv) + len);
862	}	1203	}
863	else	1204	else
864	sv = newSVpvn (buf, len);	1205	sv = newSVpvn (buf, len);
…		…
951		1292
952	if (!is_nv)	1293	if (!is_nv)
953	{	1294	{
954	int len = dec->cur - start;	1295	int len = dec->cur - start;
955		1296
956	// special case the rather common 1..4-digit-int case, assumes 32 bit ints or so	1297	// special case the rather common 1..5-digit-int case
957	if (*start == '-')	1298	if (*start == '-')
958	switch (len)	1299	switch (len)
959	{	1300	{
960	case 2: return newSViv (-( start [1] - '0' * 1));	1301	case 2: return newSViv (-(IV)( start [1] - '0' * 1));
961	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));	1302	case 3: return newSViv (-(IV)( start [1] * 10 + start [2] - '0' * 11));
962	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));	1303	case 4: return newSViv (-(IV)( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
963	case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));	1304	case 5: return newSViv (-(IV)( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
		1305	case 6: return newSViv (-(IV)(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));
964	}	1306	}
965	else	1307	else
966	switch (len)	1308	switch (len)
967	{	1309	{
968	case 1: return newSViv ( start [0] - '0' * 1);	1310	case 1: return newSViv ( start [0] - '0' * 1);
969	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);	1311	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
970	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);	1312	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
971	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);	1313	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
		1314	case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);
972	}	1315	}
973		1316
974	{	1317	{
975	UV uv;	1318	UV uv;
976	int numtype = grok_number (start, len, &uv);	1319	int numtype = grok_number (start, len, &uv);
…		…
985	}	1328	}
986		1329
987	len -= *start == '-' ? 1 : 0;	1330	len -= *start == '-' ? 1 : 0;
988		1331
989	// does not fit into IV or UV, try NV	1332	// does not fit into IV or UV, try NV
990	if ((sizeof (NV) == sizeof (double) && DBL_DIG >= len)	1333	if (len <= NV_DIG)
991	#if defined (LDBL_DIG)
992	|| (sizeof (NV) == sizeof (long double) && LDBL_DIG >= len)
993	#endif
994	)
995	// fits into NV without loss of precision	1334	// fits into NV without loss of precision
996	return newSVnv (Atof (start));	1335	return newSVnv (json_atof (start));
997		1336
998	// everything else fails, convert it to a string	1337	// everything else fails, convert it to a string
999	return newSVpvn (start, dec->cur - start);	1338	return newSVpvn (start, dec->cur - start);
1000	}	1339	}
1001		1340
1002	// loss of precision here	1341	// loss of precision here
1003	return newSVnv (Atof (start));	1342	return newSVnv (json_atof (start));
1004		1343
1005	fail:	1344	fail:
1006	return 0;	1345	return 0;
1007	}	1346	}
1008		1347
…		…
1032	if (*dec->cur == ']')	1371	if (*dec->cur == ']')
1033	{	1372	{
1034	++dec->cur;	1373	++dec->cur;
1035	break;	1374	break;
1036	}	1375	}
1037		1376
1038	if (*dec->cur != ',')	1377	if (*dec->cur != ',')
1039	ERR (", or ] expected while parsing array");	1378	ERR (", or ] expected while parsing array");
1040		1379
1041	++dec->cur;	1380	++dec->cur;
		1381
		1382	decode_ws (dec);
		1383
		1384	if (*dec->cur == ']' && dec->json.flags & F_RELAXED)
		1385	{
		1386	++dec->cur;
		1387	break;
		1388	}
1042	}	1389	}
1043		1390
1044	DEC_DEC_DEPTH;	1391	DEC_DEC_DEPTH;
1045	return newRV_noinc ((SV *)av);	1392	return newRV_noinc ((SV *)av);
1046		1393
…		…
1062	if (*dec->cur == '}')	1409	if (*dec->cur == '}')
1063	++dec->cur;	1410	++dec->cur;
1064	else	1411	else
1065	for (;;)	1412	for (;;)
1066	{	1413	{
1067	decode_ws (dec); EXPECT_CH ('"');	1414	EXPECT_CH ('"');
1068		1415
1069	// heuristic: assume that	1416	// heuristic: assume that
1070	// a) decode_str + hv_store_ent are abysmally slow.	1417	// a) decode_str + hv_store_ent are abysmally slow.
1071	// b) most hash keys are short, simple ascii text.	1418	// b) most hash keys are short, simple ascii text.
1072	// => try to "fast-match" such strings to avoid	1419	// => try to "fast-match" such strings to avoid
…		…
1076	char *p = dec->cur;	1423	char *p = dec->cur;
1077	char *e = p + 24; // only try up to 24 bytes	1424	char *e = p + 24; // only try up to 24 bytes
1078		1425
1079	for (;;)	1426	for (;;)
1080	{	1427	{
1081	// the >= 0x80 is true on most architectures	1428	// the >= 0x80 is false on most architectures
1082	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')	1429	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
1083	{	1430	{
1084	// slow path, back up and use decode_str	1431	// slow path, back up and use decode_str
1085	SV *key = decode_str (dec);	1432	SV *key = decode_str (dec);
1086	if (!key)	1433	if (!key)
1087	goto fail;	1434	goto fail;
1088		1435
1089	decode_ws (dec); EXPECT_CH (':');	1436	decode_ws (dec); EXPECT_CH (':');
1090		1437
		1438	decode_ws (dec);
1091	value = decode_sv (dec);	1439	value = decode_sv (dec);
1092	if (!value)	1440	if (!value)
1093	{	1441	{
1094	SvREFCNT_dec (key);	1442	SvREFCNT_dec (key);
1095	goto fail;	1443	goto fail;
…		…
1107	int len = p - key;	1455	int len = p - key;
1108	dec->cur = p + 1;	1456	dec->cur = p + 1;
1109		1457
1110	decode_ws (dec); EXPECT_CH (':');	1458	decode_ws (dec); EXPECT_CH (':');
1111		1459
		1460	decode_ws (dec);
1112	value = decode_sv (dec);	1461	value = decode_sv (dec);
1113	if (!value)	1462	if (!value)
1114	goto fail;	1463	goto fail;
1115		1464
1116	hv_store (hv, key, len, value, 0);	1465	hv_store (hv, key, len, value, 0);
…		…
1132		1481
1133	if (*dec->cur != ',')	1482	if (*dec->cur != ',')
1134	ERR (", or } expected while parsing object/hash");	1483	ERR (", or } expected while parsing object/hash");
1135		1484
1136	++dec->cur;	1485	++dec->cur;
		1486
		1487	decode_ws (dec);
		1488
		1489	if (*dec->cur == '}' && dec->json.flags & F_RELAXED)
		1490	{
		1491	++dec->cur;
		1492	break;
		1493	}
1137	}	1494	}
1138		1495
1139	DEC_DEC_DEPTH;	1496	DEC_DEC_DEPTH;
1140	sv = newRV_noinc ((SV *)hv);	1497	sv = newRV_noinc ((SV *)hv);
1141		1498
…		…
1148		1505
1149	hv_iterinit (hv);	1506	hv_iterinit (hv);
1150	he = hv_iternext (hv);	1507	he = hv_iternext (hv);
1151	hv_iterinit (hv);	1508	hv_iterinit (hv);
1152		1509
1153	// the next line creates a mortal sv each time its called.	1510	// the next line creates a mortal sv each time it's called.
1154	// might want to optimise this for common cases.	1511	// might want to optimise this for common cases.
1155	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);	1512	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);
1156		1513
1157	if (cb)	1514	if (cb)
1158	{	1515	{
1159	dSP;	1516	dSP;
1160	int count;	1517	int count;
1161		1518
1162	ENTER; SAVETMPS; PUSHMARK (SP);	1519	ENTER; SAVETMPS;
		1520	SAVESTACK_POS ();
		1521	PUSHMARK (SP);
1163	XPUSHs (HeVAL (he));	1522	XPUSHs (HeVAL (he));
		1523	sv_2mortal (sv);
1164		1524
1165	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;	1525	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
1166		1526
1167	if (count == 1)	1527	if (count == 1)
1168	{	1528	{
1169	sv = newSVsv (POPs);	1529	sv = newSVsv (POPs);
1170	FREETMPS; LEAVE;	1530	FREETMPS; LEAVE;
1171	return sv;	1531	return sv;
1172	}	1532	}
1173		1533
		1534	SvREFCNT_inc (sv);
1174	FREETMPS; LEAVE;	1535	FREETMPS; LEAVE;
1175	}	1536	}
1176	}	1537	}
1177		1538
1178	if (dec->json.cb_object)	1539	if (dec->json.cb_object)
1179	{	1540	{
1180	dSP;	1541	dSP;
1181	int count;	1542	int count;
1182		1543
1183	ENTER; SAVETMPS; PUSHMARK (SP);	1544	ENTER; SAVETMPS;
		1545	SAVESTACK_POS ();
		1546	PUSHMARK (SP);
1184	XPUSHs (sv_2mortal (sv));	1547	XPUSHs (sv_2mortal (sv));
1185		1548
1186	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;	1549	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;
1187		1550
1188	if (count == 1)	1551	if (count == 1)
…		…
1204	DEC_DEC_DEPTH;	1567	DEC_DEC_DEPTH;
1205	return 0;	1568	return 0;
1206	}	1569	}
1207		1570
1208	static SV *	1571	static SV *
		1572	decode_tag (dec_t *dec)
		1573	{
		1574	SV *tag = 0;
		1575	SV *val = 0;
		1576
		1577	if (!(dec->json.flags & F_ALLOW_TAGS))
		1578	ERR ("malformed JSON string, neither array, object, number, string or atom");
		1579
		1580	++dec->cur;
		1581
		1582	decode_ws (dec);
		1583
		1584	tag = decode_sv (dec);
		1585	if (!tag)
		1586	goto fail;
		1587
		1588	if (!SvPOK (tag))
		1589	ERR ("malformed JSON string, (tag) must be a string");
		1590
		1591	decode_ws (dec);
		1592
		1593	if (*dec->cur != ')')
		1594	ERR (") expected after tag");
		1595
		1596	++dec->cur;
		1597
		1598	decode_ws (dec);
		1599
		1600	val = decode_sv (dec);
		1601	if (!val)
		1602	goto fail;
		1603
		1604	if (!SvROK (val) || SvTYPE (SvRV (val)) != SVt_PVAV)
		1605	ERR ("malformed JSON string, tag value must be an array");
		1606
		1607	{
		1608	AV *av = (AV *)SvRV (val);
		1609	int i, len = av_len (av) + 1;
		1610	HV *stash = gv_stashsv (tag, 0);
		1611	SV *sv;
		1612
		1613	if (!stash)
		1614	ERR ("cannot decode perl-object (package does not exist)");
		1615
		1616	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1617
		1618	if (!method)
		1619	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1620
		1621	dSP;
		1622
		1623	ENTER; SAVETMPS;
		1624	PUSHMARK (SP);
		1625	EXTEND (SP, len + 2);
		1626	// we re-bless the reference to get overload and other niceties right
		1627	PUSHs (tag);
		1628	PUSHs (sv_json);
		1629
		1630	for (i = 0; i < len; ++i)
		1631	PUSHs (*av_fetch (av, i, 1));
		1632
		1633	PUTBACK;
		1634	call_sv ((SV *)GvCV (method), G_SCALAR);
		1635	SPAGAIN;
		1636
		1637	SvREFCNT_dec (tag);
		1638	SvREFCNT_dec (val);
		1639	sv = SvREFCNT_inc (POPs);
		1640
		1641	PUTBACK;
		1642
		1643	FREETMPS; LEAVE;
		1644
		1645	return sv;
		1646	}
		1647
		1648	fail:
		1649	SvREFCNT_dec (tag);
		1650	SvREFCNT_dec (val);
		1651	return 0;
		1652	}
		1653
		1654	static SV *
1209	decode_sv (dec_t *dec)	1655	decode_sv (dec_t *dec)
1210	{	1656	{
1211	decode_ws (dec);
1212
1213	// the beauty of JSON: you need exactly one character lookahead	1657	// the beauty of JSON: you need exactly one character lookahead
1214	// to parse anything.	1658	// to parse everything.
1215	switch (*dec->cur)	1659	switch (*dec->cur)
1216	{	1660	{
1217	case '"': ++dec->cur; return decode_str (dec);	1661	case '"': ++dec->cur; return decode_str (dec);
1218	case '[': ++dec->cur; return decode_av (dec);	1662	case '[': ++dec->cur; return decode_av (dec);
1219	case '{': ++dec->cur; return decode_hv (dec);	1663	case '{': ++dec->cur; return decode_hv (dec);
		1664	case '(': return decode_tag (dec);
1220		1665
1221	case '-':	1666	case '-':
1222	case '0': case '1': case '2': case '3': case '4':	1667	case '0': case '1': case '2': case '3': case '4':
1223	case '5': case '6': case '7': case '8': case '9':	1668	case '5': case '6': case '7': case '8': case '9':
1224	return decode_num (dec);	1669	return decode_num (dec);
1225		1670
1226	case 't':	1671	case 't':
1227	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1672	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
1228	{	1673	{
1229	dec->cur += 4;	1674	dec->cur += 4;
1230	return SvREFCNT_inc (json_true);	1675	#if JSON_SLOW
		1676	bool_true = get_bool ("Types::Serialiser::true");
		1677	#endif
		1678	return newSVsv (bool_true);
1231	}	1679	}
1232	else	1680	else
1233	ERR ("'true' expected");	1681	ERR ("'true' expected");
1234		1682
1235	break;	1683	break;
1236		1684
1237	case 'f':	1685	case 'f':
1238	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))	1686	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
1239	{	1687	{
1240	dec->cur += 5;	1688	dec->cur += 5;
		1689	#if JSON_SLOW
		1690	bool_false = get_bool ("Types::Serialiser::false");
		1691	#endif
1241	return SvREFCNT_inc (json_false);	1692	return newSVsv (bool_false);
1242	}	1693	}
1243	else	1694	else
1244	ERR ("'false' expected");	1695	ERR ("'false' expected");
1245		1696
1246	break;	1697	break;
…		…
1255	ERR ("'null' expected");	1706	ERR ("'null' expected");
1256		1707
1257	break;	1708	break;
1258		1709
1259	default:	1710	default:
1260	ERR ("malformed JSON string, neither array, object, number, string or atom");	1711	ERR ("malformed JSON string, neither tag, array, object, number, string or atom");
1261	break;	1712	break;
1262	}	1713	}
1263		1714
1264	fail:	1715	fail:
1265	return 0;	1716	return 0;
1266	}	1717	}
1267		1718
1268	static SV *	1719	static SV *
1269	decode_json (SV *string, JSON *json, UV *offset_return)	1720	decode_json (SV *string, JSON *json, STRLEN *offset_return)
1270	{	1721	{
1271	dec_t dec;	1722	dec_t dec;
1272	UV offset;
1273	SV *sv;	1723	SV *sv;
1274		1724
		1725	/* work around bugs in 5.10 where manipulating magic values
		1726	* makes perl ignore the magic in subsequent accesses.
		1727	* also make a copy of non-PV values, to get them into a clean
		1728	* state (SvPV should do that, but it's buggy, see below).
		1729	*
		1730	* SvIsCOW_shared_hash works around a bug in perl (possibly 5.16),
		1731	* as reported by Reini Urban.
		1732	*/
1275	SvGETMAGIC (string);	1733	/*SvGETMAGIC (string);*/
		1734	if (SvMAGICAL (string) || !SvPOK (string) || SvIsCOW_shared_hash (string))
		1735	string = sv_2mortal (newSVsv (string));
		1736
1276	SvUPGRADE (string, SVt_PV);	1737	SvUPGRADE (string, SVt_PV);
1277		1738
1278	if (json->flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (json->flags))	1739	/* work around a bug in perl 5.10, which causes SvCUR to fail an
		1740	* assertion with -DDEBUGGING, although SvCUR is documented to
		1741	* return the xpv_cur field which certainly exists after upgrading.
		1742	* according to nicholas clark, calling SvPOK fixes this.
		1743	* But it doesn't fix it, so try another workaround, call SvPV_nolen
		1744	* and hope for the best.
		1745	* Damnit, SvPV_nolen still trips over yet another assertion. This
		1746	* assertion business is seriously broken, try yet another workaround
		1747	* for the broken -DDEBUGGING.
		1748	*/
		1749	{
		1750	#ifdef DEBUGGING
		1751	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
		1752	#else
		1753	STRLEN offset = SvCUR (string);
		1754	#endif
		1755
		1756	if (offset > json->max_size && json->max_size)
1279	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",	1757	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
1280	(unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (json->flags));	1758	(unsigned long)SvCUR (string), (unsigned long)json->max_size);
		1759	}
1281		1760
1282	if (json->flags & F_UTF8)	1761	if (DECODE_WANTS_OCTETS (json))
1283	sv_utf8_downgrade (string, 0);	1762	sv_utf8_downgrade (string, 0);
1284	else	1763	else
1285	sv_utf8_upgrade (string);	1764	sv_utf8_upgrade (string);
1286		1765
1287	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1766	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
1288		1767
1289	dec.json = *json;	1768	dec.json = *json;
1290	dec.cur = SvPVX (string);	1769	dec.cur = SvPVX (string);
1291	dec.end = SvEND (string);	1770	dec.end = SvEND (string);
1292	dec.err = 0;	1771	dec.err = 0;
1293	dec.depth = 0;	1772	dec.depth = 0;
1294	dec.maxdepth = DEC_DEPTH (dec.json.flags);
1295		1773
1296	if (dec.json.cb_object || dec.json.cb_sk_object)	1774	if (dec.json.cb_object || dec.json.cb_sk_object)
1297	dec.json.flags |= F_HOOK;	1775	dec.json.flags |= F_HOOK;
1298		1776
1299	*dec.end = 0; // this should basically be a nop, too, but make sure it's there	1777	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
		1778
		1779	decode_ws (&dec);
1300	sv = decode_sv (&dec);	1780	sv = decode_sv (&dec);
1301		1781
1302	if (!(offset_return || !sv))	1782	if (offset_return)
		1783	*offset_return = dec.cur - SvPVX (string);
		1784	else if (sv)
1303	{	1785	{
1304	// check for trailing garbage	1786	// check for trailing garbage
1305	decode_ws (&dec);	1787	decode_ws (&dec);
1306		1788
1307	if (*dec.cur)	1789	if (*dec.cur)
1308	{	1790	{
1309	dec.err = "garbage after JSON object";	1791	dec.err = "garbage after JSON object";
1310	SvREFCNT_dec (sv);	1792	SvREFCNT_dec (sv);
1311	sv = 0;	1793	sv = 0;
1312	}	1794	}
1313	}
1314
1315	if (offset_return || !sv)
1316	{
1317	offset = dec.json.flags & F_UTF8
1318	? dec.cur - SvPVX (string)
1319	: utf8_distance (dec.cur, SvPVX (string));
1320
1321	if (offset_return)
1322	*offset_return = offset;
1323	}	1795	}
1324		1796
1325	if (!sv)	1797	if (!sv)
1326	{	1798	{
1327	SV *uni = sv_newmortal ();	1799	SV *uni = sv_newmortal ();
…		…
1333	SAVEVPTR (PL_curcop);	1805	SAVEVPTR (PL_curcop);
1334	PL_curcop = &cop;	1806	PL_curcop = &cop;
1335	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);	1807	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);
1336	LEAVE;	1808	LEAVE;
1337		1809
1338	croak ("%s, at character offset %d [\"%s\"]",	1810	croak ("%s, at character offset %d (before \"%s\")",
1339	dec.err,	1811	dec.err,
1340	(int)offset,	1812	(int)ptr_to_index (string, dec.cur),
1341	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1813	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
1342	}	1814	}
1343		1815
1344	sv = sv_2mortal (sv);	1816	sv = sv_2mortal (sv);
1345		1817
1346	if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))	1818	if (!(dec.json.flags & F_ALLOW_NONREF) && json_nonref (sv))
1347	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");	1819	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
1348		1820
1349	return sv;	1821	return sv;
		1822	}
		1823
		1824	/////////////////////////////////////////////////////////////////////////////
		1825	// incremental parser
		1826
		1827	static void
		1828	incr_parse (JSON *self)
		1829	{
		1830	const char *p = SvPVX (self->incr_text) + self->incr_pos;
		1831
		1832	// the state machine here is a bit convoluted and could be simplified a lot
		1833	// but this would make it slower, so...
		1834
		1835	for (;;)
		1836	{
		1837	//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
		1838	switch (self->incr_mode)
		1839	{
		1840	// only used for initial whitespace skipping
		1841	case INCR_M_WS:
		1842	for (;;)
		1843	{
		1844	if (*p > 0x20)
		1845	{
		1846	if (*p == '#')
		1847	{
		1848	self->incr_mode = INCR_M_C0;
		1849	goto incr_m_c;
		1850	}
		1851	else
		1852	{
		1853	self->incr_mode = INCR_M_JSON;
		1854	goto incr_m_json;
		1855	}
		1856	}
		1857	else if (!*p)
		1858	goto interrupt;
		1859
		1860	++p;
		1861	}
		1862
		1863	// skip a single char inside a string (for \\-processing)
		1864	case INCR_M_BS:
		1865	if (!*p)
		1866	goto interrupt;
		1867
		1868	++p;
		1869	self->incr_mode = INCR_M_STR;
		1870	goto incr_m_str;
		1871
		1872	// inside #-style comments
		1873	case INCR_M_C0:
		1874	case INCR_M_C1:
		1875	incr_m_c:
		1876	for (;;)
		1877	{
		1878	if (*p == '\n')
		1879	{
		1880	self->incr_mode = self->incr_mode == INCR_M_C0 ? INCR_M_WS : INCR_M_JSON;
		1881	break;
		1882	}
		1883	else if (!*p)
		1884	goto interrupt;
		1885
		1886	++p;
		1887	}
		1888
		1889	break;
		1890
		1891	// inside a string
		1892	case INCR_M_STR:
		1893	incr_m_str:
		1894	for (;;)
		1895	{
		1896	if (*p == '"')
		1897	{
		1898	++p;
		1899	self->incr_mode = INCR_M_JSON;
		1900
		1901	if (!self->incr_nest)
		1902	goto interrupt;
		1903
		1904	goto incr_m_json;
		1905	}
		1906	else if (*p == '\\')
		1907	{
		1908	++p; // "virtually" consumes character after \
		1909
		1910	if (!*p) // if at end of string we have to switch modes
		1911	{
		1912	self->incr_mode = INCR_M_BS;
		1913	goto interrupt;
		1914	}
		1915	}
		1916	else if (!*p)
		1917	goto interrupt;
		1918
		1919	++p;
		1920	}
		1921
		1922	// after initial ws, outside string
		1923	case INCR_M_JSON:
		1924	incr_m_json:
		1925	for (;;)
		1926	{
		1927	switch (*p++)
		1928	{
		1929	case 0:
		1930	--p;
		1931	goto interrupt;
		1932
		1933	case 0x09:
		1934	case 0x0a:
		1935	case 0x0d:
		1936	case 0x20:
		1937	if (!self->incr_nest)
		1938	{
		1939	--p; // do not eat the whitespace, let the next round do it
		1940	goto interrupt;
		1941	}
		1942	break;
		1943
		1944	case '"':
		1945	self->incr_mode = INCR_M_STR;
		1946	goto incr_m_str;
		1947
		1948	case '[':
		1949	case '{':
		1950	case '(':
		1951	if (++self->incr_nest > self->max_depth)
		1952	croak (ERR_NESTING_EXCEEDED);
		1953	break;
		1954
		1955	case ']':
		1956	case '}':
		1957	if (--self->incr_nest <= 0)
		1958	goto interrupt;
		1959	break;
		1960
		1961	case ')':
		1962	--self->incr_nest;
		1963	break;
		1964
		1965	case '#':
		1966	self->incr_mode = INCR_M_C1;
		1967	goto incr_m_c;
		1968	}
		1969	}
		1970	}
		1971
		1972	modechange:
		1973	;
		1974	}
		1975
		1976	interrupt:
		1977	self->incr_pos = p - SvPVX (self->incr_text);
		1978	//printf ("interrupt<%.*s>\n", self->incr_pos, SvPVX(self->incr_text));//D
		1979	//printf ("return pos %d mode %d nest %d\n", self->incr_pos, self->incr_mode, self->incr_nest);//D
1350	}	1980	}
1351		1981
1352	/////////////////////////////////////////////////////////////////////////////	1982	/////////////////////////////////////////////////////////////////////////////
1353	// XS interface functions	1983	// XS interface functions
1354		1984
…		…
1363	i >= '0' && i <= '9' ? i - '0'	1993	i >= '0' && i <= '9' ? i - '0'
1364	: i >= 'a' && i <= 'f' ? i - 'a' + 10	1994	: i >= 'a' && i <= 'f' ? i - 'a' + 10
1365	: i >= 'A' && i <= 'F' ? i - 'A' + 10	1995	: i >= 'A' && i <= 'F' ? i - 'A' + 10
1366	: -1;	1996	: -1;
1367		1997
1368	json_stash = gv_stashpv ("JSON::XS" , 1);	1998	json_stash = gv_stashpv ("JSON::XS" , 1);
1369	json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);	1999	bool_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
		2000	bool_true = get_bool ("Types::Serialiser::true");
		2001	bool_false = get_bool ("Types::Serialiser::false");
1370		2002
1371	json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true );	2003	sv_json = newSVpv ("JSON", 0);
1372	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);	2004	SvREADONLY_on (sv_json);
		2005
		2006	CvNODEBUG_on (get_cv ("JSON::XS::incr_text", 0)); /* the debugger completely breaks lvalue subs */
1373	}	2007	}
1374		2008
1375	PROTOTYPES: DISABLE	2009	PROTOTYPES: DISABLE
1376		2010
1377	void CLONE (...)	2011	void CLONE (...)
1378	CODE:	2012	CODE:
1379	json_stash = 0;	2013	json_stash = 0;
1380	json_boolean_stash = 0;	2014	bool_stash = 0;
1381		2015
1382	void new (char *klass)	2016	void new (char *klass)
1383	PPCODE:	2017	PPCODE:
1384	{	2018	{
1385	SV *pv = NEWSV (0, sizeof (JSON));	2019	SV *pv = NEWSV (0, sizeof (JSON));
1386	SvPOK_only (pv);	2020	SvPOK_only (pv);
1387	Zero (SvPVX (pv), 1, JSON);	2021	json_init ((JSON *)SvPVX (pv));
1388	((JSON *)SvPVX (pv))->flags = F_DEFAULT;	2022	XPUSHs (sv_2mortal (sv_bless (
1389	XPUSHs (sv_2mortal (sv_bless (newRV_noinc (pv), JSON_STASH)));	2023	newRV_noinc (pv),
		2024	strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)
		2025	)));
1390	}	2026	}
1391		2027
1392	void ascii (JSON *self, int enable = 1)	2028	void ascii (JSON *self, int enable = 1)
1393	ALIAS:	2029	ALIAS:
1394	ascii = F_ASCII	2030	ascii = F_ASCII
…		…
1401	pretty = F_PRETTY	2037	pretty = F_PRETTY
1402	allow_nonref = F_ALLOW_NONREF	2038	allow_nonref = F_ALLOW_NONREF
1403	shrink = F_SHRINK	2039	shrink = F_SHRINK
1404	allow_blessed = F_ALLOW_BLESSED	2040	allow_blessed = F_ALLOW_BLESSED
1405	convert_blessed = F_CONV_BLESSED	2041	convert_blessed = F_CONV_BLESSED
		2042	relaxed = F_RELAXED
		2043	allow_unknown = F_ALLOW_UNKNOWN
		2044	allow_tags = F_ALLOW_TAGS
1406	PPCODE:	2045	PPCODE:
1407	{	2046	{
1408	if (enable)	2047	if (enable)
1409	self->flags |= ix;	2048	self->flags |= ix;
1410	else	2049	else
1411	self->flags &= ~ix;	2050	self->flags &= ~ix;
1412		2051
1413	XPUSHs (ST (0));	2052	XPUSHs (ST (0));
1414	}	2053	}
1415		2054
1416	void max_depth (JSON *self, UV max_depth = 0x80000000UL)	2055	void get_ascii (JSON *self)
		2056	ALIAS:
		2057	get_ascii = F_ASCII
		2058	get_latin1 = F_LATIN1
		2059	get_utf8 = F_UTF8
		2060	get_indent = F_INDENT
		2061	get_canonical = F_CANONICAL
		2062	get_space_before = F_SPACE_BEFORE
		2063	get_space_after = F_SPACE_AFTER
		2064	get_allow_nonref = F_ALLOW_NONREF
		2065	get_shrink = F_SHRINK
		2066	get_allow_blessed = F_ALLOW_BLESSED
		2067	get_convert_blessed = F_CONV_BLESSED
		2068	get_relaxed = F_RELAXED
		2069	get_allow_unknown = F_ALLOW_UNKNOWN
		2070	get_allow_tags = F_ALLOW_TAGS
1417	PPCODE:	2071	PPCODE:
1418	{	2072	XPUSHs (boolSV (self->flags & ix));
1419	UV log2 = 0;
1420		2073
1421	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;	2074	void max_depth (JSON *self, U32 max_depth = 0x80000000UL)
1422		2075	PPCODE:
1423	while ((1UL << log2) < max_depth)	2076	self->max_depth = max_depth;
1424	++log2;
1425
1426	self->flags = self->flags & ~F_MAXDEPTH | (log2 << S_MAXDEPTH);
1427
1428	XPUSHs (ST (0));	2077	XPUSHs (ST (0));
1429	}
1430		2078
		2079	U32 get_max_depth (JSON *self)
		2080	CODE:
		2081	RETVAL = self->max_depth;
		2082	OUTPUT:
		2083	RETVAL
		2084
1431	void max_size (JSON *self, UV max_size = 0)	2085	void max_size (JSON *self, U32 max_size = 0)
1432	PPCODE:	2086	PPCODE:
1433	{	2087	self->max_size = max_size;
1434	UV log2 = 0;
1435
1436	if (max_size > 0x80000000UL) max_size = 0x80000000UL;
1437	if (max_size == 1) max_size = 2;
1438
1439	while ((1UL << log2) < max_size)
1440	++log2;
1441
1442	self->flags = self->flags & ~F_MAXSIZE | (log2 << S_MAXSIZE);
1443
1444	XPUSHs (ST (0));	2088	XPUSHs (ST (0));
1445	}	2089
		2090	int get_max_size (JSON *self)
		2091	CODE:
		2092	RETVAL = self->max_size;
		2093	OUTPUT:
		2094	RETVAL
1446		2095
1447	void filter_json_object (JSON *self, SV *cb = &PL_sv_undef)	2096	void filter_json_object (JSON *self, SV *cb = &PL_sv_undef)
1448	PPCODE:	2097	PPCODE:
1449	{	2098	{
1450	SvREFCNT_dec (self->cb_object);	2099	SvREFCNT_dec (self->cb_object);
…		…
1454	}	2103	}
1455		2104
1456	void filter_json_single_key_object (JSON *self, SV *key, SV *cb = &PL_sv_undef)	2105	void filter_json_single_key_object (JSON *self, SV *key, SV *cb = &PL_sv_undef)
1457	PPCODE:	2106	PPCODE:
1458	{	2107	{
1459	if (!self->cb_sk_object)	2108	if (!self->cb_sk_object)
1460	self->cb_sk_object = newHV ();	2109	self->cb_sk_object = newHV ();
1461		2110
1462	if (SvOK (cb))	2111	if (SvOK (cb))
1463	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);	2112	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1464	else	2113	else
…		…
1475	XPUSHs (ST (0));	2124	XPUSHs (ST (0));
1476	}	2125	}
1477		2126
1478	void encode (JSON *self, SV *scalar)	2127	void encode (JSON *self, SV *scalar)
1479	PPCODE:	2128	PPCODE:
1480	XPUSHs (encode_json (scalar, self));	2129	PUTBACK; scalar = encode_json (scalar, self); SPAGAIN;
		2130	XPUSHs (scalar);
1481		2131
1482	void decode (JSON *self, SV *jsonstr)	2132	void decode (JSON *self, SV *jsonstr)
1483	PPCODE:	2133	PPCODE:
1484	XPUSHs (decode_json (jsonstr, self, 0));	2134	PUTBACK; jsonstr = decode_json (jsonstr, self, 0); SPAGAIN;
		2135	XPUSHs (jsonstr);
1485		2136
1486	void decode_prefix (JSON *self, SV *jsonstr)	2137	void decode_prefix (JSON *self, SV *jsonstr)
1487	PPCODE:	2138	PPCODE:
1488	{	2139	{
1489	UV offset;	2140	SV *sv;
		2141	STRLEN offset;
		2142	PUTBACK; sv = decode_json (jsonstr, self, &offset); SPAGAIN;
1490	EXTEND (SP, 2);	2143	EXTEND (SP, 2);
1491	PUSHs (decode_json (jsonstr, self, &offset));	2144	PUSHs (sv);
1492	PUSHs (sv_2mortal (newSVuv (offset)));	2145	PUSHs (sv_2mortal (newSVuv (ptr_to_index (jsonstr, SvPV_nolen (jsonstr) + offset))));
		2146	}
		2147
		2148	void incr_parse (JSON *self, SV *jsonstr = 0)
		2149	PPCODE:
		2150	{
		2151	if (!self->incr_text)
		2152	self->incr_text = newSVpvn ("", 0);
		2153
		2154	/* if utf8-ness doesn't match the decoder, need to upgrade/downgrade */
		2155	if (!DECODE_WANTS_OCTETS (self) == !SvUTF8 (self->incr_text))
		2156	if (DECODE_WANTS_OCTETS (self))
		2157	{
		2158	if (self->incr_pos)
		2159	self->incr_pos = utf8_length ((U8 *)SvPVX (self->incr_text),
		2160	(U8 *)SvPVX (self->incr_text) + self->incr_pos);
		2161
		2162	sv_utf8_downgrade (self->incr_text, 0);
		2163	}
		2164	else
		2165	{
		2166	sv_utf8_upgrade (self->incr_text);
		2167
		2168	if (self->incr_pos)
		2169	self->incr_pos = utf8_hop ((U8 *)SvPVX (self->incr_text), self->incr_pos)
		2170	- (U8 *)SvPVX (self->incr_text);
		2171	}
		2172
		2173	// append data, if any
		2174	if (jsonstr)
		2175	{
		2176	/* make sure both strings have same encoding */
		2177	if (SvUTF8 (jsonstr) != SvUTF8 (self->incr_text))
		2178	if (SvUTF8 (jsonstr))
		2179	sv_utf8_downgrade (jsonstr, 0);
		2180	else
		2181	sv_utf8_upgrade (jsonstr);
		2182
		2183	/* and then just blindly append */
		2184	{
		2185	STRLEN len;
		2186	const char *str = SvPV (jsonstr, len);
		2187	STRLEN cur = SvCUR (self->incr_text);
		2188
		2189	if (SvLEN (self->incr_text) - cur <= len)
		2190	json_sv_grow (self->incr_text, cur, len);
		2191
		2192	Move (str, SvEND (self->incr_text), len, char);
		2193	SvCUR_set (self->incr_text, SvCUR (self->incr_text) + len);
		2194	*SvEND (self->incr_text) = 0; // this should basically be a nop, too, but make sure it's there
		2195	}
		2196	}
		2197
		2198	if (GIMME_V != G_VOID)
		2199	do
		2200	{
		2201	SV *sv;
		2202	STRLEN offset;
		2203
		2204	if (!INCR_DONE (self))
		2205	{
		2206	incr_parse (self);
		2207
		2208	if (self->incr_pos > self->max_size && self->max_size)
		2209	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		2210	(unsigned long)self->incr_pos, (unsigned long)self->max_size);
		2211
		2212	if (!INCR_DONE (self))
		2213	{
		2214	// as an optimisation, do not accumulate white space in the incr buffer
		2215	if (self->incr_mode == INCR_M_WS && self->incr_pos)
		2216	{
		2217	self->incr_pos = 0;
		2218	SvCUR_set (self->incr_text, 0);
		2219	}
		2220
		2221	break;
		2222	}
		2223	}
		2224
		2225	PUTBACK; sv = decode_json (self->incr_text, self, &offset); SPAGAIN;
		2226	XPUSHs (sv);
		2227
		2228	self->incr_pos -= offset;
		2229	self->incr_nest = 0;
		2230	self->incr_mode = 0;
		2231
		2232	sv_chop (self->incr_text, SvPVX (self->incr_text) + offset);
		2233	}
		2234	while (GIMME_V == G_ARRAY);
		2235	}
		2236
		2237	SV *incr_text (JSON *self)
		2238	ATTRS: lvalue
		2239	CODE:
		2240	{
		2241	if (self->incr_pos)
		2242	croak ("incr_text can not be called when the incremental parser already started parsing");
		2243
		2244	RETVAL = self->incr_text ? SvREFCNT_inc (self->incr_text) : &PL_sv_undef;
		2245	}
		2246	OUTPUT:
		2247	RETVAL
		2248
		2249	void incr_skip (JSON *self)
		2250	CODE:
		2251	{
		2252	if (self->incr_pos)
		2253	{
		2254	sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + self->incr_pos);
		2255	self->incr_pos = 0;
		2256	self->incr_nest = 0;
		2257	self->incr_mode = 0;
		2258	}
		2259	}
		2260
		2261	void incr_reset (JSON *self)
		2262	CODE:
		2263	{
		2264	SvREFCNT_dec (self->incr_text);
		2265	self->incr_text = 0;
		2266	self->incr_pos = 0;
		2267	self->incr_nest = 0;
		2268	self->incr_mode = 0;
1493	}	2269	}
1494		2270
1495	void DESTROY (JSON *self)	2271	void DESTROY (JSON *self)
1496	CODE:	2272	CODE:
1497	SvREFCNT_dec (self->cb_sk_object);	2273	SvREFCNT_dec (self->cb_sk_object);
1498	SvREFCNT_dec (self->cb_object);	2274	SvREFCNT_dec (self->cb_object);
		2275	SvREFCNT_dec (self->incr_text);
1499		2276
1500	PROTOTYPES: ENABLE	2277	PROTOTYPES: ENABLE
1501		2278
1502	void to_json (SV *scalar)	2279	void encode_json (SV *scalar)
1503	PPCODE:	2280	PPCODE:
1504	{	2281	{
1505	JSON json = { F_DEFAULT | F_UTF8 };	2282	JSON json;
1506	XPUSHs (encode_json (scalar, &json));	2283	json_init (&json);
		2284	json.flags |= F_UTF8;
		2285	PUTBACK; scalar = encode_json (scalar, &json); SPAGAIN;
		2286	XPUSHs (scalar);
1507	}	2287	}
1508		2288
1509	void from_json (SV *jsonstr)	2289	void decode_json (SV *jsonstr)
1510	PPCODE:	2290	PPCODE:
1511	{	2291	{
1512	JSON json = { F_DEFAULT | F_UTF8 };	2292	JSON json;
1513	XPUSHs (decode_json (jsonstr, &json, 0));	2293	json_init (&json);
		2294	json.flags |= F_UTF8;
		2295	PUTBACK; jsonstr = decode_json (jsonstr, &json, 0); SPAGAIN;
		2296	XPUSHs (jsonstr);
1514	}	2297	}
1515		2298

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