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Comparing JSON-XS/XS.xs (file contents):
Revision 1.11 by root, Sat Mar 24 19:42:14 2007 UTC vs.
Revision 1.133 by root, Tue Aug 28 16:16:17 2018 UTC

1	#include "EXTERN.h"	1	#include "EXTERN.h"
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
4		4
5	#include "assert.h"	5	#include <assert.h>
6	#include "string.h"	6	#include <string.h>
7	#include "stdlib.h"	7	#include <stdlib.h>
		8	#include <stdio.h>
		9	#include <limits.h>
		10	#include <float.h>
		11	#include <inttypes.h>
8		12
		13	#if defined(__BORLANDC__) || defined(_MSC_VER)
		14	# define snprintf _snprintf // C compilers have this in stdio.h
		15	#endif
		16
		17	// some old perls do not have this, try to make it work, no
		18	// guarantees, though. if it breaks, you get to keep the pieces.
		19	#ifndef UTF8_MAXBYTES
		20	# define UTF8_MAXBYTES 13
		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)
		36
9	#define F_ASCII 0x00000001	37	#define F_ASCII 0x00000001UL
		38	#define F_LATIN1 0x00000002UL
10	#define F_UTF8 0x00000002	39	#define F_UTF8 0x00000004UL
11	#define F_INDENT 0x00000004	40	#define F_INDENT 0x00000008UL
12	#define F_CANONICAL 0x00000008	41	#define F_CANONICAL 0x00000010UL
13	#define F_SPACE_BEFORE 0x00000010	42	#define F_SPACE_BEFORE 0x00000020UL
14	#define F_SPACE_AFTER 0x00000020	43	#define F_SPACE_AFTER 0x00000040UL
15	#define F_ALLOW_NONREF 0x00000080	44	#define F_ALLOW_NONREF 0x00000100UL
16	#define F_SHRINK 0x00000100	45	#define F_SHRINK 0x00000200UL
		46	#define F_ALLOW_BLESSED 0x00000400UL
		47	#define F_CONV_BLESSED 0x00000800UL
		48	#define F_RELAXED 0x00001000UL
		49	#define F_ALLOW_UNKNOWN 0x00002000UL
		50	#define F_ALLOW_TAGS 0x00004000UL
		51	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
17		52
18	#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER	53	#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER
19	#define F_DEFAULT 0
20		54
21	#define INIT_SIZE 32 // initial scalar size to be allocated	55	#define INIT_SIZE 32 // initial scalar size to be allocated
		56	#define INDENT_STEP 3 // spaces per indentation level
		57
		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)
22		61
23	#define SB do {	62	#define SB do {
24	#define SE } while (0)	63	#define SE } while (0)
25		64
26	static HV *json_stash;	65	#if __GNUC__ >= 3
		66	# define expect(expr,value) __builtin_expect ((expr), (value))
		67	# define INLINE static inline
		68	#else
		69	# define expect(expr,value) (expr)
		70	# define INLINE static
		71	#endif
		72
		73	#define expect_false(expr) expect ((expr) != 0, 0)
		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?)"
		81
		82	#ifdef USE_ITHREADS
		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))
		86	#else
		87	# define JSON_STASH json_stash
		88	# define BOOL_STASH bool_stash
		89	# define GET_BOOL(value) bool_ ## value
		90	#endif
		91
		92	// the amount of HEs to allocate on the stack, when sorting keys
		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)
		109
		110	typedef struct {
		111	U32 flags;
		112	U32 max_depth;
		113	STRLEN max_size;
		114
		115	SV *cb_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;
		125	} JSON;
		126
		127	INLINE void
		128	json_init (JSON *json)
		129	{
		130	Zero (json, 1, JSON);
		131	json->max_depth = 512;
		132	}
		133
		134	/////////////////////////////////////////////////////////////////////////////
		135	// utility functions
		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
		148	INLINE void
		149	shrink (SV *sv)
		150	{
		151	sv_utf8_downgrade (sv, 1);
		152
		153	if (SvLEN (sv) > SvCUR (sv) + 1)
		154	{
		155	#ifdef SvPV_shrink_to_cur
		156	SvPV_shrink_to_cur (sv);
		157	#elif defined (SvPV_renew)
		158	SvPV_renew (sv, SvCUR (sv) + 1);
		159	#endif
		160	}
		161	}
		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
		188	// decode a utf-8 character and return it, or (UV)-1 in
		189	// case of an error.
		190	// we special-case "safe" characters from U+80 .. U+7FF,
		191	// but use the very good perl function to parse anything else.
		192	// note that we never call this function for a ascii codepoints
		193	INLINE UV
		194	decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)
		195	{
		196	if (expect_true (len >= 2
		197	&& IN_RANGE_INC (char, s[0], 0xc2, 0xdf)
		198	&& IN_RANGE_INC (char, s[1], 0x80, 0xbf)))
		199	{
		200	*clen = 2;
		201	return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);
		202	}
		203	else
		204	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);
		205	}
		206
		207	// likewise for encoding, also never called for ascii codepoints
		208	// this function takes advantage of this fact, although current gccs
		209	// seem to optimise the check for >= 0x80 away anyways
		210	INLINE unsigned char *
		211	encode_utf8 (unsigned char *s, UV ch)
		212	{
		213	if (expect_false (ch < 0x000080))
		214	*s++ = ch;
		215	else if (expect_true (ch < 0x000800))
		216	*s++ = 0xc0 | ( ch >> 6),
		217	*s++ = 0x80 | ( ch & 0x3f);
		218	else if ( ch < 0x010000)
		219	*s++ = 0xe0 | ( ch >> 12),
		220	*s++ = 0x80 | ((ch >> 6) & 0x3f),
		221	*s++ = 0x80 | ( ch & 0x3f);
		222	else if ( ch < 0x110000)
		223	*s++ = 0xf0 | ( ch >> 18),
		224	*s++ = 0x80 | ((ch >> 12) & 0x3f),
		225	*s++ = 0x80 | ((ch >> 6) & 0x3f),
		226	*s++ = 0x80 | ( ch & 0x3f);
		227
		228	return s;
		229	}
		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
		378	/////////////////////////////////////////////////////////////////////////////
		379	// encoder
27		380
28	// structure used for encoding JSON	381	// structure used for encoding JSON
29	typedef struct	382	typedef struct
30	{	383	{
31	char *cur;	384	char *cur; // SvPVX (sv) + current output position
32	STRLEN len; // SvLEN (sv)
33	char *end; // SvEND (sv)	385	char *end; // SvEND (sv)
34	SV *sv;	386	SV *sv; // result scalar
35	UV flags;	387	JSON json;
36	int max_recurse;	388	U32 indent; // indentation level
37	int indent;	389	UV limit; // escape character values >= this value when encoding
38	} enc_t;	390	} enc_t;
39		391
40	// structure used for decoding JSON	392	INLINE void
41	typedef struct
42	{
43	char *cur;
44	char *end;
45	const char *err;
46	UV flags;
47	} dec_t;
48
49	static UV *
50	SvJSON (SV *sv)
51	{
52	if (!(SvROK (sv) && SvOBJECT (SvRV (sv)) && SvSTASH (SvRV (sv)) == json_stash))
53	croak ("object is not of type JSON::XS");
54
55	return &SvUVX (SvRV (sv));
56	}
57
58	static void
59	shrink (SV *sv)
60	{
61	sv_utf8_downgrade (sv, 1);
62	#ifdef SvPV_shrink_to_cur
63	SvPV_shrink_to_cur (sv);
64	#endif
65	}
66
67	/////////////////////////////////////////////////////////////////////////////
68
69	static void
70	need (enc_t *enc, STRLEN len)	393	need (enc_t *enc, STRLEN len)
71	{	394	{
72	if (enc->cur + len >= enc->end)	395	if (expect_false ((uintptr_t)(enc->end - enc->cur) < len))
73	{	396	{
74	STRLEN cur = enc->cur - SvPVX (enc->sv);	397	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
75	SvGROW (enc->sv, cur + len + 1);	398	char *buf = json_sv_grow (enc->sv, cur, len);
76	enc->cur = SvPVX (enc->sv) + cur;	399	enc->cur = buf + cur;
77	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv);	400	enc->end = buf + SvLEN (enc->sv) - 1;
78	}	401	}
79	}	402	}
80		403
81	static void	404	INLINE void
82	encode_ch (enc_t *enc, char ch)	405	encode_ch (enc_t *enc, char ch)
83	{	406	{
84	need (enc, 1);	407	need (enc, 1);
85	*enc->cur++ = ch;	408	*enc->cur++ = ch;
86	}	409	}
…		…
94		417
95	while (str < end)	418	while (str < end)
96	{	419	{
97	unsigned char ch = *(unsigned char *)str;	420	unsigned char ch = *(unsigned char *)str;
98		421
99	if (ch >= 0x20 && ch < 0x80) // most common case	422	if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case
100	{	423	{
101	if (ch == '"') // but with slow exceptions	424	if (expect_false (ch == '"')) // but with slow exceptions
102	{	425	{
103	need (enc, len += 1);	426	need (enc, len + 1);
104	*enc->cur++ = '\\';	427	*enc->cur++ = '\\';
105	*enc->cur++ = '"';	428	*enc->cur++ = '"';
106	}	429	}
107	else if (ch == '\\')	430	else if (expect_false (ch == '\\'))
108	{	431	{
109	need (enc, len += 1);	432	need (enc, len + 1);
110	*enc->cur++ = '\\';	433	*enc->cur++ = '\\';
111	*enc->cur++ = '\\';	434	*enc->cur++ = '\\';
112	}	435	}
113	else	436	else
114	*enc->cur++ = ch;	437	*enc->cur++ = ch;
…		…
117	}	440	}
118	else	441	else
119	{	442	{
120	switch (ch)	443	switch (ch)
121	{	444	{
122	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;
123	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;
124	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;
125	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;
126	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;
127		450
128	default:	451	default:
129	{	452	{
130	STRLEN clen;	453	STRLEN clen;
131	UV uch;	454	UV uch;
132		455
133	if (is_utf8)	456	if (is_utf8)
134	{	457	{
135	uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY);	458	uch = decode_utf8 (str, end - str, &clen);
136	if (clen == (STRLEN)-1)	459	if (clen == (STRLEN)-1)
137	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);	460	croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);
138	}	461	}
139	else	462	else
140	{	463	{
141	uch = ch;	464	uch = ch;
142	clen = 1;	465	clen = 1;
143	}	466	}
144		467
145	if (uch > 0x10FFFFUL)	468	if (uch < 0x80/*0x20*/ || uch >= enc->limit)
146	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
147
148	if (uch < 0x80 || enc->flags & F_ASCII)
149	{	469	{
150	if (uch > 0xFFFFUL)	470	if (uch >= 0x10000UL)
151	{	471	{
		472	if (uch >= 0x110000UL)
		473	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
		474
152	need (enc, len += 11);	475	need (enc, len + 11);
153	sprintf (enc->cur, "\\u%04x\\u%04x",	476	sprintf (enc->cur, "\\u%04x\\u%04x",
154	(int)((uch - 0x10000) / 0x400 + 0xD800),	477	(int)((uch - 0x10000) / 0x400 + 0xD800),
155	(int)((uch - 0x10000) % 0x400 + 0xDC00));	478	(int)((uch - 0x10000) % 0x400 + 0xDC00));
156	enc->cur += 12;	479	enc->cur += 12;
157	}	480	}
158	else	481	else
159	{	482	{
160	static char hexdigit [16] = "0123456789abcdef";
161	need (enc, len += 5);	483	need (enc, len + 5);
162	*enc->cur++ = '\\';	484	*enc->cur++ = '\\';
163	*enc->cur++ = 'u';	485	*enc->cur++ = 'u';
164	*enc->cur++ = hexdigit [ uch >> 12 ];	486	*enc->cur++ = PL_hexdigit [ uch >> 12 ];
165	*enc->cur++ = hexdigit [(uch >> 8) & 15];	487	*enc->cur++ = PL_hexdigit [(uch >> 8) & 15];
166	*enc->cur++ = hexdigit [(uch >> 4) & 15];	488	*enc->cur++ = PL_hexdigit [(uch >> 4) & 15];
167	*enc->cur++ = hexdigit [(uch >> 0) & 15];	489	*enc->cur++ = PL_hexdigit [(uch >> 0) & 15];
168	}	490	}
169		491
		492	str += clen;
		493	}
		494	else if (enc->json.flags & F_LATIN1)
		495	{
		496	*enc->cur++ = uch;
170	str += clen;	497	str += clen;
171	}	498	}
172	else if (is_utf8)	499	else if (is_utf8)
173	{	500	{
174	need (enc, len += clen);	501	need (enc, len + clen);
175	do	502	do
176	{	503	{
177	*enc->cur++ = *str++;	504	*enc->cur++ = *str++;
178	}	505	}
179	while (--clen);	506	while (--clen);
180	}	507	}
181	else	508	else
182	{	509	{
183	need (enc, len += 10); // never more than 11 bytes needed	510	need (enc, len + UTF8_MAXBYTES - 1); // never more than 11 bytes needed
184	enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0);	511	enc->cur = encode_utf8 (enc->cur, uch);
185	++str;	512	++str;
186	}	513	}
187	}	514	}
188	}	515	}
189	}	516	}
190		517
191	--len;	518	--len;
192	}	519	}
193	}	520	}
194		521
195	#define INDENT SB \	522	INLINE void
		523	encode_indent (enc_t *enc)
		524	{
196	if (enc->flags & F_INDENT) \	525	if (enc->json.flags & F_INDENT)
197	{ \	526	{
198	int i_; \	527	int spaces = enc->indent * INDENT_STEP;
199	need (enc, enc->indent); \	528
200	for (i_ = enc->indent * 3; i_--; )\	529	need (enc, spaces);
		530	memset (enc->cur, ' ', spaces);
		531	enc->cur += spaces;
		532	}
		533	}
		534
		535	INLINE void
		536	encode_space (enc_t *enc)
		537	{
		538	need (enc, 1);
		539	encode_ch (enc, ' ');
		540	}
		541
		542	INLINE void
		543	encode_nl (enc_t *enc)
		544	{
		545	if (enc->json.flags & F_INDENT)
		546	{
		547	need (enc, 1);
201	encode_ch (enc, ' '); \	548	encode_ch (enc, '\n');
202	} \	549	}
203	SE	550	}
204		551
205	#define SPACE SB need (enc, 1); encode_ch (enc, ' '); SE	552	INLINE void
206	#define NL SB if (enc->flags & F_INDENT) { need (enc, 1); encode_ch (enc, '\n'); } SE	553	encode_comma (enc_t *enc)
207	#define COMMA SB \	554	{
208	encode_ch (enc, ','); \	555	encode_ch (enc, ',');
		556
209	if (enc->flags & F_INDENT) \	557	if (enc->json.flags & F_INDENT)
210	NL; \	558	encode_nl (enc);
211	else if (enc->flags & F_SPACE_AFTER) \	559	else if (enc->json.flags & F_SPACE_AFTER)
212	SPACE; \	560	encode_space (enc);
213	SE	561	}
214		562
215	static void encode_sv (enc_t *enc, SV *sv);	563	static void encode_sv (enc_t *enc, SV *sv);
216		564
217	static void	565	static void
218	encode_av (enc_t *enc, AV *av)	566	encode_av (enc_t *enc, AV *av)
219	{	567	{
220	int i, len = av_len (av);	568	int i, len = av_len (av);
221		569
		570	if (enc->indent >= enc->json.max_depth)
		571	croak (ERR_NESTING_EXCEEDED);
		572
222	encode_ch (enc, '['); NL;	573	encode_ch (enc, '[');
223	++enc->indent;
224		574
		575	if (len >= 0)
		576	{
		577	encode_nl (enc); ++enc->indent;
		578
225	for (i = 0; i <= len; ++i)	579	for (i = 0; i <= len; ++i)
226	{	580	{
227	INDENT;	581	SV **svp = av_fetch (av, i, 0);
228	encode_sv (enc, *av_fetch (av, i, 0));
229		582
		583	encode_indent (enc);
		584
		585	if (svp)
		586	encode_sv (enc, *svp);
		587	else
		588	encode_str (enc, "null", 4, 0);
		589
230	if (i < len)	590	if (i < len)
231	COMMA;	591	encode_comma (enc);
232	}	592	}
233		593
234	NL;	594	encode_nl (enc); --enc->indent; encode_indent (enc);
		595	}
235		596
236	--enc->indent;
237	INDENT; encode_ch (enc, ']');	597	encode_ch (enc, ']');
238	}	598	}
239		599
240	static void	600	static void
241	encode_he (enc_t *enc, HE *he)	601	encode_hk (enc_t *enc, HE *he)
242	{	602	{
243	encode_ch (enc, '"');	603	encode_ch (enc, '"');
244		604
245	if (HeKLEN (he) == HEf_SVKEY)	605	if (HeKLEN (he) == HEf_SVKEY)
246	{	606	{
247	SV *sv = HeSVKEY (he);	607	SV *sv = HeSVKEY (he);
248	STRLEN len;	608	STRLEN len;
249	char *str;	609	char *str;
250		610
251	SvGETMAGIC (sv);	611	SvGETMAGIC (sv);
252	str = SvPV (sv, len);	612	str = SvPV (sv, len);
253		613
254	encode_str (enc, str, len, SvUTF8 (sv));	614	encode_str (enc, str, len, SvUTF8 (sv));
255	}	615	}
256	else	616	else
257	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));	617	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));
258		618
259	encode_ch (enc, '"');	619	encode_ch (enc, '"');
260		620
261	if (enc->flags & F_SPACE_BEFORE) SPACE;	621	if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);
262	encode_ch (enc, ':');	622	encode_ch (enc, ':');
263	if (enc->flags & F_SPACE_AFTER ) SPACE;	623	if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);
264	encode_sv (enc, HeVAL (he));
265	}	624	}
266		625
267	// compare hash entries, used when all keys are bytestrings	626	// compare hash entries, used when all keys are bytestrings
268	static int	627	static int
269	he_cmp_fast (const void *a_, const void *b_)	628	he_cmp_fast (const void *a_, const void *b_)
…		…
274	HE *b = *(HE **)b_;	633	HE *b = *(HE **)b_;
275		634
276	STRLEN la = HeKLEN (a);	635	STRLEN la = HeKLEN (a);
277	STRLEN lb = HeKLEN (b);	636	STRLEN lb = HeKLEN (b);
278		637
279	if (!(cmp = memcmp (HeKEY (a), HeKEY (b), la < lb ? la : lb)))	638	if (!(cmp = memcmp (HeKEY (b), HeKEY (a), lb < la ? lb : la)))
280	cmp = la - lb;	639	cmp = lb - la;
281		640
282	return cmp;	641	return cmp;
283	}	642	}
284		643
285	// compare hash entries, used when some keys are sv's or utf-x	644	// compare hash entries, used when some keys are sv's or utf-x
286	static int	645	static int
287	he_cmp_slow (const void *a, const void *b)	646	he_cmp_slow (const void *a, const void *b)
288	{	647	{
289	return sv_cmp (HeSVKEY_force (*(HE **)a), HeSVKEY_force (*(HE **)b));	648	return sv_cmp (HeSVKEY_force (*(HE **)b), HeSVKEY_force (*(HE **)a));
290	}	649	}
291		650
292	static void	651	static void
293	encode_hv (enc_t *enc, HV *hv)	652	encode_hv (enc_t *enc, HV *hv)
294	{	653	{
295	int count, i;	654	HE *he;
296		655
297	encode_ch (enc, '{'); NL; ++enc->indent;	656	if (enc->indent >= enc->json.max_depth)
		657	croak (ERR_NESTING_EXCEEDED);
298		658
299	if ((count = hv_iterinit (hv)))	659	encode_ch (enc, '{');
300	{	660
301	// for canonical output we have to sort by keys first	661	// for canonical output we have to sort by keys first
302	// actually, this is mostly due to the stupid so-called	662	// actually, this is mostly due to the stupid so-called
303	// security workaround added somewhere in 5.8.x.	663	// security workaround added somewhere in 5.8.x
304	// that randomises hash orderings	664	// that randomises hash orderings
305	if (enc->flags & F_CANONICAL)	665	if (enc->json.flags & F_CANONICAL && !SvRMAGICAL (hv))
		666	{
		667	int count = hv_iterinit (hv);
		668
		669	if (SvMAGICAL (hv))
306	{	670	{
307	HE *he, *hes [count];	671	// need to count by iterating. could improve by dynamically building the vector below
		672	// but I don't care for the speed of this special case.
		673	// note also that we will run into undefined behaviour when the two iterations
		674	// do not result in the same count, something I might care for in some later release.
		675
		676	count = 0;
		677	while (hv_iternext (hv))
		678	++count;
		679
		680	hv_iterinit (hv);
		681	}
		682
		683	if (count)
		684	{
308	int fast = 1;	685	int i, fast = 1;
		686	HE *hes_stack [STACK_HES];
		687	HE **hes = hes_stack;
		688
		689	// allocate larger arrays on the heap
		690	if (count > STACK_HES)
		691	{
		692	SV *sv = sv_2mortal (NEWSV (0, count * sizeof (*hes)));
		693	hes = (HE **)SvPVX (sv);
		694	}
309		695
310	i = 0;	696	i = 0;
311	while ((he = hv_iternext (hv)))	697	while ((he = hv_iternext (hv)))
312	{	698	{
313	hes [i++] = he;	699	hes [i++] = he;
…		…
335		721
336	FREETMPS;	722	FREETMPS;
337	LEAVE;	723	LEAVE;
338	}	724	}
339		725
340	for (i = 0; i < count; ++i)	726	encode_nl (enc); ++enc->indent;
		727
		728	while (count--)
341	{	729	{
342	INDENT;	730	encode_indent (enc);
		731	he = hes [count];
343	encode_he (enc, hes [i]);	732	encode_hk (enc, he);
		733	encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
344		734
345	if (i < count - 1)	735	if (count)
346	COMMA;	736	encode_comma (enc);
347	}	737	}
348		738
349	NL;	739	encode_nl (enc); --enc->indent; encode_indent (enc);
350	}	740	}
		741	}
		742	else
		743	{
		744	if (hv_iterinit (hv) || SvMAGICAL (hv))
		745	if ((he = hv_iternext (hv)))
		746	{
		747	encode_nl (enc); ++enc->indent;
		748
		749	for (;;)
		750	{
		751	encode_indent (enc);
		752	encode_hk (enc, he);
		753	encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
		754
		755	if (!(he = hv_iternext (hv)))
		756	break;
		757
		758	encode_comma (enc);
		759	}
		760
		761	encode_nl (enc); --enc->indent; encode_indent (enc);
		762	}
		763	}
		764
		765	encode_ch (enc, '}');
		766	}
		767
		768	// encode objects, arrays and special \0=false and \1=true values.
		769	static void
		770	encode_rv (enc_t *enc, SV *sv)
		771	{
		772	svtype svt;
		773	GV *method;
		774
		775	SvGETMAGIC (sv);
		776	svt = SvTYPE (sv);
		777
		778	if (expect_false (SvOBJECT (sv)))
		779	{
		780	HV *stash = SvSTASH (sv);
		781
		782	if (stash == bool_stash)
		783	{
		784	if (SvIV (sv)) encode_str (enc, "true" , 4, 0);
		785	else encode_str (enc, "false", 5, 0);
		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);
351	else	854	else
352	{	855	croak ("encountered object '%s', but neither allow_blessed, convert_blessed nor allow_tags settings are enabled (or TO_JSON/FREEZE method missing)",
353	SV *sv;	856	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
354	HE *he = hv_iternext (hv);	857	}
355		858	else if (svt == SVt_PVHV)
356	for (;;)	859	encode_hv (enc, (HV *)sv);
357	{	860	else if (svt == SVt_PVAV)
358	INDENT;	861	encode_av (enc, (AV *)sv);
359	encode_he (enc, he);	862	else if (svt < SVt_PVAV)
360
361	if (!(he = hv_iternext (hv)))
362	break;
363
364	COMMA;
365	}
366
367	NL;
368	}
369	}	863	{
		864	int bool_type = ref_bool_type (sv);
370		865
371	--enc->indent; INDENT; encode_ch (enc, '}');	866	if (bool_type == 1)
		867	encode_str (enc, "true", 4, 0);
		868	else if (bool_type == 0)
		869	encode_str (enc, "false", 5, 0);
		870	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		871	encode_str (enc, "null", 4, 0);
		872	else
		873	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
		874	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		875	}
		876	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		877	encode_str (enc, "null", 4, 0);
		878	else
		879	croak ("encountered %s, but JSON can only represent references to arrays or hashes",
		880	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
372	}	881	}
373		882
374	static void	883	static void
375	encode_sv (enc_t *enc, SV *sv)	884	encode_sv (enc_t *enc, SV *sv)
376	{	885	{
…		…
384	encode_str (enc, str, len, SvUTF8 (sv));	893	encode_str (enc, str, len, SvUTF8 (sv));
385	encode_ch (enc, '"');	894	encode_ch (enc, '"');
386	}	895	}
387	else if (SvNOKp (sv))	896	else if (SvNOKp (sv))
388	{	897	{
		898	// trust that perl will do the right thing w.r.t. JSON syntax.
389	need (enc, NV_DIG + 32);	899	need (enc, NV_DIG + 32);
390	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);	900	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
391	enc->cur += strlen (enc->cur);	901	enc->cur += strlen (enc->cur);
392	}	902	}
393	else if (SvIOKp (sv))	903	else if (SvIOKp (sv))
394	{	904	{
		905	// we assume we can always read an IV as a UV and vice versa
		906	// we assume two's complement
		907	// we assume no aliasing issues in the union
		908	if (SvIsUV (sv) ? SvUVX (sv) <= 59000
		909	: SvIVX (sv) <= 59000 && SvIVX (sv) >= -59000)
		910	{
		911	// optimise the "small number case"
		912	// code will likely be branchless and use only a single multiplication
		913	// works for numbers up to 59074
		914	I32 i = SvIVX (sv);
		915	U32 u;
		916	char digit, nz = 0;
		917
395	need (enc, 64);	918	need (enc, 6);
		919
		920	*enc->cur = '-'; enc->cur += i < 0 ? 1 : 0;
		921	u = i < 0 ? -i : i;
		922
		923	// convert to 4.28 fixed-point representation
		924	u = u * ((0xfffffff + 10000) / 10000); // 10**5, 5 fractional digits
		925
		926	// now output digit by digit, each time masking out the integer part
		927	// and multiplying by 5 while moving the decimal point one to the right,
		928	// resulting in a net multiplication by 10.
		929	// we always write the digit to memory but conditionally increment
		930	// the pointer, to enable the use of conditional move instructions.
		931	digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffffUL) * 5;
		932	digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffffUL) * 5;
		933	digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffffUL) * 5;
		934	digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffffUL) * 5;
		935	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
		936	}
		937	else
		938	{
		939	// large integer, use the (rather slow) snprintf way.
		940	need (enc, IVUV_MAXCHARS);
396	enc->cur +=	941	enc->cur +=
397	SvIsUV(sv)	942	SvIsUV(sv)
398	? snprintf (enc->cur, 64, "%"UVuf, (UV)SvUVX (sv))	943	? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv))
399	: snprintf (enc->cur, 64, "%"IVdf, (IV)SvIVX (sv));	944	: snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv));
		945	}
400	}	946	}
401	else if (SvROK (sv))	947	else if (SvROK (sv))
402	{	948	encode_rv (enc, SvRV (sv));
403	SV *rv = SvRV (sv);	949	else if (!SvOK (sv) || enc->json.flags & F_ALLOW_UNKNOWN)
404
405	if (!--enc->max_recurse)
406	croak ("data structure too deep (hit recursion limit)");
407
408	switch (SvTYPE (rv))
409	{
410	case SVt_PVAV: encode_av (enc, (AV *)rv); break;
411	case SVt_PVHV: encode_hv (enc, (HV *)rv); break;
412
413	default:
414	croak ("encountered %s, but JSON can only represent references to arrays or hashes",
415	SvPV_nolen (sv));
416	}
417	}
418	else if (!SvOK (sv))
419	encode_str (enc, "null", 4, 0);	950	encode_str (enc, "null", 4, 0);
420	else	951	else
421	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",
422	SvPV_nolen (sv), SvFLAGS (sv));	953	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
423	}	954	}
424		955
425	static SV *	956	static SV *
426	encode_json (SV *scalar, UV flags)	957	encode_json (SV *scalar, JSON *json)
427	{	958	{
		959	enc_t enc;
		960
428	if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar))	961	if (!(json->flags & F_ALLOW_NONREF) && json_nonref (scalar))
429	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)");
430		963
431	enc_t enc;	964	enc.json = *json;
432	enc.flags = flags;
433	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	965	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
434	enc.cur = SvPVX (enc.sv);	966	enc.cur = SvPVX (enc.sv);
435	enc.end = SvEND (enc.sv);	967	enc.end = SvEND (enc.sv);
436	enc.max_recurse = 0;
437	enc.indent = 0;	968	enc.indent = 0;
		969	enc.limit = enc.json.flags & F_ASCII ? 0x000080UL
		970	: enc.json.flags & F_LATIN1 ? 0x000100UL
		971	: 0x110000UL;
438		972
439	SvPOK_only (enc.sv);	973	SvPOK_only (enc.sv);
440	encode_sv (&enc, scalar);	974	encode_sv (&enc, scalar);
		975	encode_nl (&enc);
441		976
		977	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
		978	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
		979
442	if (!(flags & (F_ASCII | F_UTF8)))	980	if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8)))
443	SvUTF8_on (enc.sv);	981	SvUTF8_on (enc.sv);
444		982
445	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
446
447	if (enc.flags & F_SHRINK)	983	if (enc.json.flags & F_SHRINK)
448	shrink (enc.sv);	984	shrink (enc.sv);
449		985
450	return enc.sv;	986	return enc.sv;
451	}	987	}
452		988
453	/////////////////////////////////////////////////////////////////////////////	989	/////////////////////////////////////////////////////////////////////////////
		990	// decoder
454		991
455	#define WS \	992	// structure used for decoding JSON
		993	typedef struct
		994	{
		995	char *cur; // current parser pointer
		996	char *end; // end of input string
		997	const char *err; // parse error, if != 0
		998	JSON json;
		999	U32 depth; // recursion depth
		1000	U32 maxdepth; // recursion depth limit
		1001	} dec_t;
		1002
		1003	INLINE void
		1004	decode_comment (dec_t *dec)
		1005	{
		1006	// only '#'-style comments allowed a.t.m.
		1007
		1008	while (*dec->cur && *dec->cur != 0x0a && *dec->cur != 0x0d)
		1009	++dec->cur;
		1010	}
		1011
		1012	INLINE void
		1013	decode_ws (dec_t *dec)
		1014	{
456	for (;;) \	1015	for (;;)
457	{ \	1016	{
458	char ch = *dec->cur; \	1017	char ch = *dec->cur;
		1018
459	if (ch > 0x20 \	1019	if (ch > 0x20)
		1020	{
		1021	if (expect_false (ch == '#'))
		1022	{
		1023	if (dec->json.flags & F_RELAXED)
		1024	decode_comment (dec);
		1025	else
		1026	break;
		1027	}
		1028	else
		1029	break;
		1030	}
460	|| (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)) \	1031	else if (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)
461	break; \	1032	break; // parse error, but let higher level handle it, gives better error messages
		1033
462	++dec->cur; \	1034	++dec->cur;
463	}	1035	}
		1036	}
464		1037
465	#define ERR(reason) SB dec->err = reason; goto fail; SE	1038	#define ERR(reason) SB dec->err = reason; goto fail; SE
		1039
466	#define EXPECT_CH(ch) SB \	1040	#define EXPECT_CH(ch) SB \
467	if (*dec->cur != ch) \	1041	if (*dec->cur != ch) \
468	ERR (# ch " expected"); \	1042	ERR (# ch " expected"); \
469	++dec->cur; \	1043	++dec->cur; \
470	SE	1044	SE
471		1045
		1046	#define DEC_INC_DEPTH if (++dec->depth > dec->json.max_depth) ERR (ERR_NESTING_EXCEEDED)
		1047	#define DEC_DEC_DEPTH --dec->depth
		1048
472	static SV *decode_sv (dec_t *dec);	1049	static SV *decode_sv (dec_t *dec);
473		1050
474	static signed char decode_hexdigit[256];	1051	static signed char decode_hexdigit[256];
475		1052
476	static UV	1053	static UV
477	decode_4hex (dec_t *dec)	1054	decode_4hex (dec_t *dec)
478	{	1055	{
479	signed char d1, d2, d3, d4;	1056	signed char d1, d2, d3, d4;
		1057	unsigned char *cur = (unsigned char *)dec->cur;
480		1058
481	d1 = decode_hexdigit [((unsigned char *)dec->cur) [0]];	1059	d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("exactly four hexadecimal digits expected");
482	if (d1 < 0) ERR ("four hexadecimal digits expected");	1060	d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("exactly four hexadecimal digits expected");
483	d2 = decode_hexdigit [((unsigned char *)dec->cur) [1]];	1061	d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("exactly four hexadecimal digits expected");
484	if (d2 < 0) ERR ("four hexadecimal digits expected");	1062	d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("exactly four hexadecimal digits expected");
485	d3 = decode_hexdigit [((unsigned char *)dec->cur) [2]];
486	if (d3 < 0) ERR ("four hexadecimal digits expected");
487	d4 = decode_hexdigit [((unsigned char *)dec->cur) [3]];
488	if (d4 < 0) ERR ("four hexadecimal digits expected");
489		1063
490	dec->cur += 4;	1064	dec->cur += 4;
491		1065
492	return ((UV)d1) << 12	1066	return ((UV)d1) << 12
493	| ((UV)d2) << 8	1067	| ((UV)d2) << 8
…		…
496		1070
497	fail:	1071	fail:
498	return (UV)-1;	1072	return (UV)-1;
499	}	1073	}
500		1074
501	#define APPEND_GROW(n) SB \
502	if (cur + (n) >= end) \
503	{ \
504	STRLEN ofs = cur - SvPVX (sv); \
505	SvGROW (sv, ofs + (n) + 1); \
506	cur = SvPVX (sv) + ofs; \
507	end = SvEND (sv); \
508	} \
509	SE
510
511	#define APPEND_CH(ch) SB \
512	APPEND_GROW (1); \
513	*cur++ = (ch); \
514	SE
515
516	static SV *	1075	static SV *
517	decode_str (dec_t *dec)	1076	decode_str (dec_t *dec)
518	{	1077	{
519	SV *sv = NEWSV (0,2);	1078	SV *sv = 0;
520	int utf8 = 0;	1079	int utf8 = 0;
521	char *cur = SvPVX (sv);	1080	char *dec_cur = dec->cur;
522	char *end = SvEND (sv);
523		1081
524	for (;;)	1082	do
525	{	1083	{
526	unsigned char ch = *(unsigned char *)dec->cur;	1084	char buf [SHORT_STRING_LEN + UTF8_MAXBYTES];
		1085	char *cur = buf;
527		1086
528	if (ch == '"')	1087	do
529	break;
530	else if (ch == '\\')
531	{	1088	{
532	switch (*++dec->cur)	1089	unsigned char ch = *(unsigned char *)dec_cur++;
		1090
		1091	if (expect_false (ch == '"'))
533	{	1092	{
534	case '\\':	1093	--dec_cur;
535	case '/':	1094	break;
536	case '"': APPEND_CH (*dec->cur++); break;	1095	}
537		1096	else if (expect_false (ch == '\\'))
538	case 'b': APPEND_CH ('\010'); ++dec->cur; break;	1097	{
539	case 't': APPEND_CH ('\011'); ++dec->cur; break;	1098	switch (*dec_cur)
540	case 'n': APPEND_CH ('\012'); ++dec->cur; break;
541	case 'f': APPEND_CH ('\014'); ++dec->cur; break;
542	case 'r': APPEND_CH ('\015'); ++dec->cur; break;
543
544	case 'u':
545	{	1099	{
546	UV lo, hi;	1100	case '\\':
547	++dec->cur;	1101	case '/':
		1102	case '"': *cur++ = *dec_cur++; break;
548		1103
549	hi = decode_4hex (dec);	1104	case 'b': ++dec_cur; *cur++ = '\010'; break;
550	if (hi == (UV)-1)	1105	case 't': ++dec_cur; *cur++ = '\011'; break;
551	goto fail;	1106	case 'n': ++dec_cur; *cur++ = '\012'; break;
		1107	case 'f': ++dec_cur; *cur++ = '\014'; break;
		1108	case 'r': ++dec_cur; *cur++ = '\015'; break;
552		1109
553	// possibly a surrogate pair	1110	case 'u':
554	if (hi >= 0xd800 && hi < 0xdc00)
555	{	1111	{
556	if (dec->cur [0] != '\\' || dec->cur [1] != 'u')	1112	UV lo, hi;
557	ERR ("missing low surrogate character in surrogate pair");	1113	++dec_cur;
558		1114
559	dec->cur += 2;	1115	dec->cur = dec_cur;
560
561	lo = decode_4hex (dec);	1116	hi = decode_4hex (dec);
		1117	dec_cur = dec->cur;
562	if (lo == (UV)-1)	1118	if (hi == (UV)-1)
563	goto fail;	1119	goto fail;
564		1120
		1121	// possibly a surrogate pair
		1122	if (hi >= 0xd800)
		1123	if (hi < 0xdc00)
		1124	{
		1125	if (dec_cur [0] != '\\' || dec_cur [1] != 'u')
		1126	ERR ("missing low surrogate character in surrogate pair");
		1127
		1128	dec_cur += 2;
		1129
		1130	dec->cur = dec_cur;
		1131	lo = decode_4hex (dec);
		1132	dec_cur = dec->cur;
		1133	if (lo == (UV)-1)
		1134	goto fail;
		1135
565	if (lo < 0xdc00 || lo >= 0xe000)	1136	if (lo < 0xdc00 || lo >= 0xe000)
566	ERR ("surrogate pair expected");	1137	ERR ("surrogate pair expected");
567		1138
568	hi = (hi - 0xD800) * 0x400 + (lo - 0xDC00) + 0x10000;	1139	hi = (hi - 0xD800) * 0x400 + (lo - 0xDC00) + 0x10000;
		1140	}
		1141	else if (hi < 0xe000)
		1142	ERR ("missing high surrogate character in surrogate pair");
		1143
		1144	if (hi >= 0x80)
		1145	{
		1146	utf8 = 1;
		1147
		1148	cur = encode_utf8 (cur, hi);
		1149	}
		1150	else
		1151	*cur++ = hi;
569	}	1152	}
570	else if (hi >= 0xdc00 && hi < 0xe000)
571	ERR ("missing high surrogate character in surrogate pair");
572
573	if (hi >= 0x80)
574	{	1153	break;
575	utf8 = 1;
576		1154
577	APPEND_GROW (4); // at most 4 bytes for 21 bits
578	cur = (char *)uvuni_to_utf8_flags (cur, hi, 0);
579	}
580	else	1155	default:
581	APPEND_CH (hi);	1156	--dec_cur;
		1157	ERR ("illegal backslash escape sequence in string");
582	}	1158	}
583	break;	1159	}
		1160	else if (expect_true (ch >= 0x20 && ch < 0x80))
		1161	*cur++ = ch;
		1162	else if (ch >= 0x80)
		1163	{
		1164	STRLEN clen;
584		1165
585	default:
586	--dec->cur;	1166	--dec_cur;
587	ERR ("illegal backslash escape sequence in string");	1167
		1168	decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
		1169	if (clen == (STRLEN)-1)
		1170	ERR ("malformed UTF-8 character in JSON string");
		1171
		1172	do
		1173	*cur++ = *dec_cur++;
		1174	while (--clen);
		1175
		1176	utf8 = 1;
		1177	}
		1178	else if (ch == '\t' && dec->json.flags & F_RELAXED)
		1179	*cur++ = ch;
		1180	else
		1181	{
		1182	--dec_cur;
		1183
		1184	if (!ch)
		1185	ERR ("unexpected end of string while parsing JSON string");
		1186	else
		1187	ERR ("invalid character encountered while parsing JSON string");
588	}	1188	}
589	}	1189	}
590	else if (ch >= 0x20 && ch <= 0x7f)	1190	while (cur < buf + SHORT_STRING_LEN);
591	APPEND_CH (*dec->cur++);	1191
592	else if (ch >= 0x80)
593	{	1192	{
594	STRLEN clen;	1193	STRLEN len = cur - buf;
595	UV uch = utf8n_to_uvuni (dec->cur, dec->end - dec->cur, &clen, UTF8_CHECK_ONLY);
596	if (clen == (STRLEN)-1)
597	ERR ("malformed UTF-8 character in JSON string");
598		1194
599	APPEND_GROW (clen);	1195	if (sv)
600	do
601	{	1196	{
602	*cur++ = *dec->cur++;	1197	STRLEN cur = SvCUR (sv);
		1198
		1199	if (SvLEN (sv) - cur <= len)
		1200	json_sv_grow (sv, cur, len);
		1201
		1202	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);
		1203	SvCUR_set (sv, SvCUR (sv) + len);
603	}	1204	}
604	while (--clen);
605
606	utf8 = 1;
607	}
608	else if (dec->cur == dec->end)
609	ERR ("unexpected end of string while parsing json string");
610	else	1205	else
611	ERR ("invalid character encountered");	1206	sv = newSVpvn (buf, len);
612	}	1207	}
		1208	}
		1209	while (*dec_cur != '"');
613		1210
614	++dec->cur;	1211	++dec_cur;
615		1212
616	SvCUR_set (sv, cur - SvPVX (sv));	1213	if (sv)
617		1214	{
618	SvPOK_only (sv);	1215	SvPOK_only (sv);
619	*SvEND (sv) = 0;	1216	*SvEND (sv) = 0;
620		1217
621	if (utf8)	1218	if (utf8)
622	SvUTF8_on (sv);	1219	SvUTF8_on (sv);
		1220	}
		1221	else
		1222	sv = newSVpvn ("", 0);
623		1223
624	if (dec->flags & F_SHRINK)	1224	dec->cur = dec_cur;
625	shrink (sv);
626
627	return sv;	1225	return sv;
628		1226
629	fail:	1227	fail:
630	SvREFCNT_dec (sv);	1228	dec->cur = dec_cur;
631	return 0;	1229	return 0;
632	}	1230	}
633		1231
634	static SV *	1232	static SV *
635	decode_num (dec_t *dec)	1233	decode_num (dec_t *dec)
…		…
693	is_nv = 1;	1291	is_nv = 1;
694	}	1292	}
695		1293
696	if (!is_nv)	1294	if (!is_nv)
697	{	1295	{
698	UV uv;	1296	int len = dec->cur - start;
699	int numtype = grok_number (start, dec->cur - start, &uv);	1297
700	if (numtype & IS_NUMBER_IN_UV)	1298	// special case the rather common 1..5-digit-int case
701	if (numtype & IS_NUMBER_NEG)	1299	if (*start == '-')
		1300	switch (len)
702	{	1301	{
703	if (uv < (UV)IV_MIN)	1302	case 2: return newSViv (-(IV)( start [1] - '0' * 1));
704	return newSViv (-(IV)uv);	1303	case 3: return newSViv (-(IV)( start [1] * 10 + start [2] - '0' * 11));
		1304	case 4: return newSViv (-(IV)( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
		1305	case 5: return newSViv (-(IV)( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
		1306	case 6: return newSViv (-(IV)(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));
705	}	1307	}
		1308	else
		1309	switch (len)
		1310	{
		1311	case 1: return newSViv ( start [0] - '0' * 1);
		1312	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
		1313	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
		1314	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
		1315	case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);
		1316	}
		1317
		1318	{
		1319	UV uv;
		1320	int numtype = grok_number (start, len, &uv);
		1321	if (numtype & IS_NUMBER_IN_UV)
		1322	if (numtype & IS_NUMBER_NEG)
		1323	{
		1324	if (uv < (UV)IV_MIN)
		1325	return newSViv (-(IV)uv);
		1326	}
706	else	1327	else
707	return newSVuv (uv);	1328	return newSVuv (uv);
708	}	1329	}
709		1330
		1331	len -= *start == '-' ? 1 : 0;
		1332
		1333	// does not fit into IV or UV, try NV
		1334	if (len <= NV_DIG)
		1335	// fits into NV without loss of precision
		1336	return newSVnv (json_atof (start));
		1337
		1338	// everything else fails, convert it to a string
		1339	return newSVpvn (start, dec->cur - start);
		1340	}
		1341
		1342	// loss of precision here
710	return newSVnv (Atof (start));	1343	return newSVnv (json_atof (start));
711		1344
712	fail:	1345	fail:
713	return 0;	1346	return 0;
714	}	1347	}
715		1348
716	static SV *	1349	static SV *
717	decode_av (dec_t *dec)	1350	decode_av (dec_t *dec)
718	{	1351	{
719	AV *av = newAV ();	1352	AV *av = newAV ();
720		1353
721	WS;	1354	DEC_INC_DEPTH;
		1355	decode_ws (dec);
		1356
722	if (*dec->cur == ']')	1357	if (*dec->cur == ']')
723	++dec->cur;	1358	++dec->cur;
724	else	1359	else
725	for (;;)	1360	for (;;)
726	{	1361	{
…		…
730	if (!value)	1365	if (!value)
731	goto fail;	1366	goto fail;
732		1367
733	av_push (av, value);	1368	av_push (av, value);
734		1369
735	WS;	1370	decode_ws (dec);
736		1371
737	if (*dec->cur == ']')	1372	if (*dec->cur == ']')
738	{	1373	{
739	++dec->cur;	1374	++dec->cur;
740	break;	1375	break;
741	}	1376	}
742		1377
743	if (*dec->cur != ',')	1378	if (*dec->cur != ',')
744	ERR (", or ] expected while parsing array");	1379	ERR (", or ] expected while parsing array");
745		1380
746	++dec->cur;	1381	++dec->cur;
		1382
		1383	decode_ws (dec);
		1384
		1385	if (*dec->cur == ']' && dec->json.flags & F_RELAXED)
		1386	{
		1387	++dec->cur;
		1388	break;
		1389	}
747	}	1390	}
748		1391
		1392	DEC_DEC_DEPTH;
749	return newRV_noinc ((SV *)av);	1393	return newRV_noinc ((SV *)av);
750		1394
751	fail:	1395	fail:
752	SvREFCNT_dec (av);	1396	SvREFCNT_dec (av);
		1397	DEC_DEC_DEPTH;
753	return 0;	1398	return 0;
754	}	1399	}
755		1400
756	static SV *	1401	static SV *
757	decode_hv (dec_t *dec)	1402	decode_hv (dec_t *dec)
758	{	1403	{
		1404	SV *sv;
759	HV *hv = newHV ();	1405	HV *hv = newHV ();
760		1406
761	WS;	1407	DEC_INC_DEPTH;
		1408	decode_ws (dec);
		1409
762	if (*dec->cur == '}')	1410	if (*dec->cur == '}')
763	++dec->cur;	1411	++dec->cur;
764	else	1412	else
765	for (;;)	1413	for (;;)
766	{	1414	{
767	SV *key, *value;
768
769	WS; EXPECT_CH ('"');	1415	EXPECT_CH ('"');
770		1416
771	key = decode_str (dec);	1417	// heuristic: assume that
772	if (!key)	1418	// a) decode_str + hv_store_ent are abysmally slow.
773	goto fail;	1419	// b) most hash keys are short, simple ascii text.
		1420	// => try to "fast-match" such strings to avoid
		1421	// the overhead of decode_str + hv_store_ent.
		1422	{
		1423	SV *value;
		1424	char *p = dec->cur;
		1425	char *e = p + 24; // only try up to 24 bytes
774		1426
775	WS; EXPECT_CH (':');	1427	for (;;)
776
777	value = decode_sv (dec);
778	if (!value)
779	{	1428	{
		1429	// the >= 0x80 is false on most architectures
		1430	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
		1431	{
		1432	// slow path, back up and use decode_str
		1433	SV *key = decode_str (dec);
		1434	if (!key)
		1435	goto fail;
		1436
		1437	decode_ws (dec); EXPECT_CH (':');
		1438
		1439	decode_ws (dec);
		1440	value = decode_sv (dec);
		1441	if (!value)
		1442	{
		1443	SvREFCNT_dec (key);
		1444	goto fail;
		1445	}
		1446
		1447	hv_store_ent (hv, key, value, 0);
780	SvREFCNT_dec (key);	1448	SvREFCNT_dec (key);
		1449
		1450	break;
		1451	}
		1452	else if (*p == '"')
		1453	{
		1454	// fast path, got a simple key
		1455	char *key = dec->cur;
		1456	int len = p - key;
		1457	dec->cur = p + 1;
		1458
		1459	decode_ws (dec); EXPECT_CH (':');
		1460
		1461	decode_ws (dec);
		1462	value = decode_sv (dec);
		1463	if (!value)
781	goto fail;	1464	goto fail;
		1465
		1466	hv_store (hv, key, len, value, 0);
		1467
		1468	break;
		1469	}
		1470
		1471	++p;
782	}	1472	}
783
784	//TODO: optimise
785	hv_store_ent (hv, key, value, 0);
786
787	WS;	1473	}
		1474
		1475	decode_ws (dec);
788		1476
789	if (*dec->cur == '}')	1477	if (*dec->cur == '}')
790	{	1478	{
791	++dec->cur;	1479	++dec->cur;
792	break;	1480	break;
…		…
794		1482
795	if (*dec->cur != ',')	1483	if (*dec->cur != ',')
796	ERR (", or } expected while parsing object/hash");	1484	ERR (", or } expected while parsing object/hash");
797		1485
798	++dec->cur;	1486	++dec->cur;
		1487
		1488	decode_ws (dec);
		1489
		1490	if (*dec->cur == '}' && dec->json.flags & F_RELAXED)
		1491	{
		1492	++dec->cur;
		1493	break;
		1494	}
799	}	1495	}
800		1496
		1497	DEC_DEC_DEPTH;
801	return newRV_noinc ((SV *)hv);	1498	sv = newRV_noinc ((SV *)hv);
		1499
		1500	// check filter callbacks
		1501	if (dec->json.flags & F_HOOK)
		1502	{
		1503	if (dec->json.cb_sk_object && HvKEYS (hv) == 1)
		1504	{
		1505	HE *cb, *he;
		1506
		1507	hv_iterinit (hv);
		1508	he = hv_iternext (hv);
		1509	hv_iterinit (hv);
		1510
		1511	// the next line creates a mortal sv each time it's called.
		1512	// might want to optimise this for common cases.
		1513	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);
		1514
		1515	if (cb)
		1516	{
		1517	dSP;
		1518	int count;
		1519
		1520	ENTER; SAVETMPS;
		1521	SAVESTACK_POS ();
		1522	PUSHMARK (SP);
		1523	XPUSHs (HeVAL (he));
		1524	sv_2mortal (sv);
		1525
		1526	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
		1527
		1528	if (count == 1)
		1529	{
		1530	sv = newSVsv (POPs);
		1531	FREETMPS; LEAVE;
		1532	return sv;
		1533	}
		1534
		1535	SvREFCNT_inc (sv);
		1536	FREETMPS; LEAVE;
		1537	}
		1538	}
		1539
		1540	if (dec->json.cb_object)
		1541	{
		1542	dSP;
		1543	int count;
		1544
		1545	ENTER; SAVETMPS;
		1546	SAVESTACK_POS ();
		1547	PUSHMARK (SP);
		1548	XPUSHs (sv_2mortal (sv));
		1549
		1550	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;
		1551
		1552	if (count == 1)
		1553	{
		1554	sv = newSVsv (POPs);
		1555	FREETMPS; LEAVE;
		1556	return sv;
		1557	}
		1558
		1559	SvREFCNT_inc (sv);
		1560	FREETMPS; LEAVE;
		1561	}
		1562	}
		1563
		1564	return sv;
802		1565
803	fail:	1566	fail:
804	SvREFCNT_dec (hv);	1567	SvREFCNT_dec (hv);
		1568	DEC_DEC_DEPTH;
		1569	return 0;
		1570	}
		1571
		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);
805	return 0;	1652	return 0;
806	}	1653	}
807		1654
808	static SV *	1655	static SV *
809	decode_sv (dec_t *dec)	1656	decode_sv (dec_t *dec)
810	{	1657	{
811	WS;	1658	// the beauty of JSON: you need exactly one character lookahead
		1659	// to parse everything.
812	switch (*dec->cur)	1660	switch (*dec->cur)
813	{	1661	{
814	case '"': ++dec->cur; return decode_str (dec);	1662	case '"': ++dec->cur; return decode_str (dec);
815	case '[': ++dec->cur; return decode_av (dec);	1663	case '[': ++dec->cur; return decode_av (dec);
816	case '{': ++dec->cur; return decode_hv (dec);	1664	case '{': ++dec->cur; return decode_hv (dec);
		1665	case '(': return decode_tag (dec);
817		1666
818	case '-':	1667	case '-':
819	case '0': case '1': case '2': case '3': case '4':	1668	case '0': case '1': case '2': case '3': case '4':
820	case '5': case '6': case '7': case '8': case '9':	1669	case '5': case '6': case '7': case '8': case '9':
821	return decode_num (dec);	1670	return decode_num (dec);
822		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
823	case 't':	1687	case 't':
824	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1688	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
825	{	1689	{
826	dec->cur += 4;	1690	dec->cur += 4;
		1691
		1692	if (expect_false (!dec->json.v_true))
		1693	dec->json.v_true = GET_BOOL (true);
		1694
827	return newSViv (1);	1695	return newSVsv (dec->json.v_true);
828	}	1696	}
829	else	1697	else
830	ERR ("'true' expected");	1698	ERR ("'true' expected");
831
832	break;
833
834	case 'f':
835	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
836	{
837	dec->cur += 5;
838	return newSViv (0);
839	}
840	else
841	ERR ("'false' expected");
842		1699
843	break;	1700	break;
844		1701
845	case 'n':	1702	case 'n':
846	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))	1703	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
…		…
852	ERR ("'null' expected");	1709	ERR ("'null' expected");
853		1710
854	break;	1711	break;
855		1712
856	default:	1713	default:
857	ERR ("malformed json string, neither array, object, number, string or atom");	1714	ERR ("malformed JSON string, neither tag, array, object, number, string or atom");
858	break;	1715	break;
859	}	1716	}
860		1717
861	fail:	1718	fail:
862	return 0;	1719	return 0;
863	}	1720	}
864		1721
865	static SV *	1722	static SV *
866	decode_json (SV *string, UV flags)	1723	decode_json (SV *string, JSON *json, STRLEN *offset_return)
867	{	1724	{
		1725	dec_t dec;
868	SV *sv;	1726	SV *sv;
869		1727
870	if (flags & F_UTF8)	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	*/
		1736	/*SvGETMAGIC (string);*/
		1737	if (SvMAGICAL (string) || !SvPOK (string) || SvIsCOW_shared_hash (string))
		1738	string = sv_2mortal (newSVsv (string));
		1739
		1740	SvUPGRADE (string, SVt_PV);
		1741
		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)
		1760	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		1761	(unsigned long)SvCUR (string), (unsigned long)json->max_size);
		1762	}
		1763
		1764	if (DECODE_WANTS_OCTETS (json))
871	sv_utf8_downgrade (string, 0);	1765	sv_utf8_downgrade (string, 0);
872	else	1766	else
873	sv_utf8_upgrade (string);	1767	sv_utf8_upgrade (string);
874		1768
875	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1769	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
876		1770
877	dec_t dec;	1771	dec.json = *json;
878	dec.flags = flags;
879	dec.cur = SvPVX (string);	1772	dec.cur = SvPVX (string);
880	dec.end = SvEND (string);	1773	dec.end = SvEND (string);
881	dec.err = 0;	1774	dec.err = 0;
		1775	dec.depth = 0;
882		1776
		1777	if (dec.json.cb_object || dec.json.cb_sk_object)
		1778	dec.json.flags |= F_HOOK;
		1779
		1780	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
		1781
		1782	decode_ws (&dec);
883	sv = decode_sv (&dec);	1783	sv = decode_sv (&dec);
884		1784
		1785	if (offset_return)
		1786	*offset_return = dec.cur - SvPVX (string);
		1787	else if (sv)
		1788	{
		1789	// check for trailing garbage
		1790	decode_ws (&dec);
		1791
		1792	if (*dec.cur)
		1793	{
		1794	dec.err = "garbage after JSON object";
		1795	SvREFCNT_dec (sv);
		1796	sv = 0;
		1797	}
		1798	}
		1799
885	if (!sv)	1800	if (!sv)
886	{	1801	{
887	IV offset = dec.flags & F_UTF8
888	? dec.cur - SvPVX (string)
889	: utf8_distance (dec.cur, SvPVX (string));
890	SV *uni = sv_newmortal ();	1802	SV *uni = sv_newmortal ();
891		1803
892	// horrible hack to silence warning inside pv_uni_display	1804	// horrible hack to silence warning inside pv_uni_display
893	COP cop = *PL_curcop;	1805	COP cop = *PL_curcop;
894	cop.cop_warnings = pWARN_NONE;	1806	cop.cop_warnings = pWARN_NONE;
…		…
896	SAVEVPTR (PL_curcop);	1808	SAVEVPTR (PL_curcop);
897	PL_curcop = &cop;	1809	PL_curcop = &cop;
898	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);
899	LEAVE;	1811	LEAVE;
900		1812
901	croak ("%s, at character offset %d (%s)",	1813	croak ("%s, at character offset %d (before \"%s\")",
902	dec.err,	1814	dec.err,
903	(int)offset,	1815	(int)ptr_to_index (string, dec.cur),
904	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1816	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
905	}	1817	}
906		1818
907	sv = sv_2mortal (sv);	1819	sv = sv_2mortal (sv);
908		1820
909	if (!(dec.flags & F_ALLOW_NONREF) && !SvROK (sv))	1821	if (!(dec.json.flags & F_ALLOW_NONREF) && json_nonref (sv))
910	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)");
911		1823
912	return sv;	1824	return sv;
913	}	1825	}
914		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
		1983	}
		1984
		1985	/////////////////////////////////////////////////////////////////////////////
		1986	// XS interface functions
		1987
915	MODULE = JSON::XS PACKAGE = JSON::XS	1988	MODULE = JSON::XS PACKAGE = JSON::XS
916		1989
917	BOOT:	1990	BOOT:
918	{	1991	{
919	int i;	1992	int i;
920		1993
921	memset (decode_hexdigit, 0xff, 256);
922	for (i = 10; i--; )	1994	for (i = 0; i < 256; ++i)
923	decode_hexdigit ['0' + i] = i;	1995	decode_hexdigit [i] =
		1996	i >= '0' && i <= '9' ? i - '0'
		1997	: i >= 'a' && i <= 'f' ? i - 'a' + 10
		1998	: i >= 'A' && i <= 'F' ? i - 'A' + 10
		1999	: -1;
924		2000
925	for (i = 7; i--; )	2001	json_stash = gv_stashpv ("JSON::XS" , 1);
926	{	2002	bool_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
927	decode_hexdigit ['a' + i] = 10 + i;	2003	bool_false = get_bool ("Types::Serialiser::false");
928	decode_hexdigit ['A' + i] = 10 + i;	2004	bool_true = get_bool ("Types::Serialiser::true");
		2005
		2006	sv_json = newSVpv ("JSON", 0);
		2007	SvREADONLY_on (sv_json);
		2008
		2009	CvNODEBUG_on (get_cv ("JSON::XS::incr_text", 0)); /* the debugger completely breaks lvalue subs */
		2010	}
		2011
		2012	PROTOTYPES: DISABLE
		2013
		2014	void CLONE (...)
		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.
		2019	json_stash = 0;
		2020	bool_stash = 0;
		2021	bool_false = 0;
		2022	bool_true = 0;
		2023
		2024	void new (char *klass)
		2025	PPCODE:
		2026	{
		2027	SV *pv = NEWSV (0, sizeof (JSON));
		2028	SvPOK_only (pv);
		2029	json_init ((JSON *)SvPVX (pv));
		2030	XPUSHs (sv_2mortal (sv_bless (
		2031	newRV_noinc (pv),
		2032	strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)
		2033	)));
		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);
929	}	2049	}
930		2050
931	json_stash = gv_stashpv ("JSON::XS", 1);	2051	void ascii (JSON *self, int enable = 1)
932	}	2052	ALIAS:
		2053	ascii = F_ASCII
		2054	latin1 = F_LATIN1
		2055	utf8 = F_UTF8
		2056	indent = F_INDENT
		2057	canonical = F_CANONICAL
		2058	space_before = F_SPACE_BEFORE
		2059	space_after = F_SPACE_AFTER
		2060	pretty = F_PRETTY
		2061	allow_nonref = F_ALLOW_NONREF
		2062	shrink = F_SHRINK
		2063	allow_blessed = F_ALLOW_BLESSED
		2064	convert_blessed = F_CONV_BLESSED
		2065	relaxed = F_RELAXED
		2066	allow_unknown = F_ALLOW_UNKNOWN
		2067	allow_tags = F_ALLOW_TAGS
		2068	PPCODE:
		2069	{
		2070	if (enable)
		2071	self->flags |= ix;
		2072	else
		2073	self->flags &= ~ix;
933		2074
934	PROTOTYPES: DISABLE	2075	XPUSHs (ST (0));
		2076	}
935		2077
936	SV *new (char *dummy)	2078	void get_ascii (JSON *self)
		2079	ALIAS:
		2080	get_ascii = F_ASCII
		2081	get_latin1 = F_LATIN1
		2082	get_utf8 = F_UTF8
		2083	get_indent = F_INDENT
		2084	get_canonical = F_CANONICAL
		2085	get_space_before = F_SPACE_BEFORE
		2086	get_space_after = F_SPACE_AFTER
		2087	get_allow_nonref = F_ALLOW_NONREF
		2088	get_shrink = F_SHRINK
		2089	get_allow_blessed = F_ALLOW_BLESSED
		2090	get_convert_blessed = F_CONV_BLESSED
		2091	get_relaxed = F_RELAXED
		2092	get_allow_unknown = F_ALLOW_UNKNOWN
		2093	get_allow_tags = F_ALLOW_TAGS
		2094	PPCODE:
		2095	XPUSHs (boolSV (self->flags & ix));
		2096
		2097	void max_depth (JSON *self, U32 max_depth = 0x80000000UL)
		2098	PPCODE:
		2099	self->max_depth = max_depth;
		2100	XPUSHs (ST (0));
		2101
		2102	U32 get_max_depth (JSON *self)
937	CODE:	2103	CODE:
938	RETVAL = sv_bless (newRV_noinc (newSVuv (F_DEFAULT)), json_stash);	2104	RETVAL = self->max_depth;
939	OUTPUT:	2105	OUTPUT:
940	RETVAL	2106	RETVAL
941		2107
942	SV *ascii (SV *self, int enable = 1)	2108	void max_size (JSON *self, U32 max_size = 0)
943	ALIAS:	2109	PPCODE:
944	ascii = F_ASCII	2110	self->max_size = max_size;
945	utf8 = F_UTF8	2111	XPUSHs (ST (0));
946	indent = F_INDENT	2112
947	canonical = F_CANONICAL	2113	int get_max_size (JSON *self)
948	space_before = F_SPACE_BEFORE
949	space_after = F_SPACE_AFTER
950	pretty = F_PRETTY
951	allow_nonref = F_ALLOW_NONREF
952	shrink = F_SHRINK
953	CODE:	2114	CODE:
954	{	2115	RETVAL = self->max_size;
955	UV *uv = SvJSON (self);
956	if (enable)
957	*uv |= ix;
958	else
959	*uv &= ~ix;
960
961	RETVAL = newSVsv (self);
962	}
963	OUTPUT:	2116	OUTPUT:
964	RETVAL	2117	RETVAL
965		2118
966	void encode (SV *self, SV *scalar)	2119	void filter_json_object (JSON *self, SV *cb = &PL_sv_undef)
967	PPCODE:	2120	PPCODE:
968	XPUSHs (encode_json (scalar, *SvJSON (self)));	2121	{
		2122	SvREFCNT_dec (self->cb_object);
		2123	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;
969		2124
970	void decode (SV *self, SV *jsonstr)	2125	XPUSHs (ST (0));
		2126	}
		2127
		2128	void filter_json_single_key_object (JSON *self, SV *key, SV *cb = &PL_sv_undef)
971	PPCODE:	2129	PPCODE:
972	XPUSHs (decode_json (jsonstr, *SvJSON (self)));	2130	{
		2131	if (!self->cb_sk_object)
		2132	self->cb_sk_object = newHV ();
		2133
		2134	if (SvOK (cb))
		2135	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
		2136	else
		2137	{
		2138	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
		2139
		2140	if (!HvKEYS (self->cb_sk_object))
		2141	{
		2142	SvREFCNT_dec (self->cb_sk_object);
		2143	self->cb_sk_object = 0;
		2144	}
		2145	}
		2146
		2147	XPUSHs (ST (0));
		2148	}
		2149
		2150	void encode (JSON *self, SV *scalar)
		2151	PPCODE:
		2152	PUTBACK; scalar = encode_json (scalar, self); SPAGAIN;
		2153	XPUSHs (scalar);
		2154
		2155	void decode (JSON *self, SV *jsonstr)
		2156	PPCODE:
		2157	PUTBACK; jsonstr = decode_json (jsonstr, self, 0); SPAGAIN;
		2158	XPUSHs (jsonstr);
		2159
		2160	void decode_prefix (JSON *self, SV *jsonstr)
		2161	PPCODE:
		2162	{
		2163	SV *sv;
		2164	STRLEN offset;
		2165	PUTBACK; sv = decode_json (jsonstr, self, &offset); SPAGAIN;
		2166	EXTEND (SP, 2);
		2167	PUSHs (sv);
		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;
		2292	}
		2293
		2294	void DESTROY (JSON *self)
		2295	CODE:
		2296	SvREFCNT_dec (self->v_false);
		2297	SvREFCNT_dec (self->v_true);
		2298	SvREFCNT_dec (self->cb_sk_object);
		2299	SvREFCNT_dec (self->cb_object);
		2300	SvREFCNT_dec (self->incr_text);
973		2301
974	PROTOTYPES: ENABLE	2302	PROTOTYPES: ENABLE
975		2303
976	void to_json (SV *scalar)	2304	void encode_json (SV *scalar)
977	PPCODE:	2305	PPCODE:
978	XPUSHs (encode_json (scalar, F_UTF8));	2306	{
		2307	JSON json;
		2308	json_init (&json);
		2309	json.flags |= F_UTF8;
		2310	PUTBACK; scalar = encode_json (scalar, &json); SPAGAIN;
		2311	XPUSHs (scalar);
		2312	}
979		2313
980	void from_json (SV *jsonstr)	2314	void decode_json (SV *jsonstr)
981	PPCODE:	2315	PPCODE:
982	XPUSHs (decode_json (jsonstr, F_UTF8));	2316	{
		2317	JSON json;
		2318	json_init (&json);
		2319	json.flags |= F_UTF8;
		2320	PUTBACK; jsonstr = decode_json (jsonstr, &json, 0); SPAGAIN;
		2321	XPUSHs (jsonstr);
		2322	}
983		2323

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