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Comparing JSON-XS/XS.xs (file contents):
Revision 1.20 by root, Sun Mar 25 21:53:19 2007 UTC vs.
Revision 1.134 by root, Thu Nov 15 20:13:03 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 0x00000001UL	37	#define F_ASCII 0x00000001UL
		38	#define F_LATIN1 0x00000002UL
10	#define F_UTF8 0x00000002UL	39	#define F_UTF8 0x00000004UL
11	#define F_INDENT 0x00000004UL	40	#define F_INDENT 0x00000008UL
12	#define F_CANONICAL 0x00000008UL	41	#define F_CANONICAL 0x00000010UL
13	#define F_SPACE_BEFORE 0x00000010UL	42	#define F_SPACE_BEFORE 0x00000020UL
14	#define F_SPACE_AFTER 0x00000020UL	43	#define F_SPACE_AFTER 0x00000040UL
15	#define F_ALLOW_NONREF 0x00000080UL	44	#define F_ALLOW_NONREF 0x00000100UL
16	#define F_SHRINK 0x00000100UL	45	#define F_SHRINK 0x00000200UL
		46	#define F_ALLOW_BLESSED 0x00000400UL
		47	#define F_CONV_BLESSED 0x00000800UL
17	#define F_MAXDEPTH 0xf8000000UL	48	#define F_RELAXED 0x00001000UL
18	#define S_MAXDEPTH 27	49	#define F_ALLOW_UNKNOWN 0x00002000UL
19		50	#define F_ALLOW_TAGS 0x00004000UL
20	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))	51	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
21
22	// F_SELFCONVERT? <=> to_json/toJson
23	// F_BLESSED? <=> { $__class__$ => }
24		52
25	#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER	53	#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER
26	#define F_DEFAULT (13UL << S_MAXDEPTH)
27		54
28	#define INIT_SIZE 32 // initial scalar size to be allocated	55	#define INIT_SIZE 64 // initial scalar size to be allocated
29	#define INDENT_STEP 3 // spaces per indentation level	56	#define INDENT_STEP 3 // spaces per indentation level
30		57
31	#define UTF8_MAX_LEN 11 // for perls UTF-X: max. number of octets per character
32	#define SHORT_STRING_LEN 512 // special-case strings of up to this size	58	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size
		59
		60	#define DECODE_WANTS_OCTETS(json) ((json)->flags & F_UTF8)
33		61
34	#define SB do {	62	#define SB do {
35	#define SE } while (0)	63	#define SE } while (0)
36		64
37	static HV *json_stash; // JSON::XS::	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	}
38		133
39	/////////////////////////////////////////////////////////////////////////////	134	/////////////////////////////////////////////////////////////////////////////
40	// utility functions	135	// utility functions
41		136
42	static UV *	137	INLINE SV *
43	SvJSON (SV *sv)	138	get_bool (const char *name)
44	{	139	{
45	if (!(SvROK (sv) && SvOBJECT (SvRV (sv)) && SvSTASH (SvRV (sv)) == json_stash))	140	SV *sv = get_sv (name, 1);
46	croak ("object is not of type JSON::XS");
47		141
48	return &SvUVX (SvRV (sv));	142	SvREADONLY_on (sv);
49	}	143	SvREADONLY_on (SvRV (sv));
50		144
51	static void	145	return sv;
		146	}
		147
		148	INLINE void
52	shrink (SV *sv)	149	shrink (SV *sv)
53	{	150	{
54	sv_utf8_downgrade (sv, 1);	151	sv_utf8_downgrade (sv, 1);
		152
55	if (SvLEN (sv) > SvCUR (sv) + 1)	153	if (SvLEN (sv) > SvCUR (sv) + 1)
56	{	154	{
57	#ifdef SvPV_shrink_to_cur	155	#ifdef SvPV_shrink_to_cur
58	SvPV_shrink_to_cur (sv);	156	SvPV_shrink_to_cur (sv);
59	#elif defined (SvPV_renew)	157	#elif defined (SvPV_renew)
60	SvPV_renew (sv, SvCUR (sv) + 1);	158	SvPV_renew (sv, SvCUR (sv) + 1);
61	#endif	159	#endif
62	}	160	}
63	}	161	}
64		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
65	// decode an utf-8 character and return it, or (UV)-1 in	188	// decode a utf-8 character and return it, or (UV)-1 in
66	// case of an error.	189	// case of an error.
67	// we special-case "safe" characters from U+80 .. U+7FF,	190	// we special-case "safe" characters from U+80 .. U+7FF,
68	// but use the very good perl function to parse anything else.	191	// but use the very good perl function to parse anything else.
69	// note that we never call this function for a ascii codepoints	192	// note that we never call this function for a ascii codepoints
70	static UV	193	INLINE UV
71	decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)	194	decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)
72	{	195	{
73	if (s[0] > 0xdf || s[0] < 0xc2)	196	if (expect_true (len >= 2
74	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);	197	&& IN_RANGE_INC (char, s[0], 0xc2, 0xdf)
75	else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf)	198	&& IN_RANGE_INC (char, s[1], 0x80, 0xbf)))
76	{	199	{
77	*clen = 2;	200	*clen = 2;
78	return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);	201	return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);
79	}	202	}
80	else	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))
81	return (UV)-1;	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;
82	}	376	}
83		377
84	/////////////////////////////////////////////////////////////////////////////	378	/////////////////////////////////////////////////////////////////////////////
85	// encoder	379	// encoder
86		380
…		…
88	typedef struct	382	typedef struct
89	{	383	{
90	char *cur; // SvPVX (sv) + current output position	384	char *cur; // SvPVX (sv) + current output position
91	char *end; // SvEND (sv)	385	char *end; // SvEND (sv)
92	SV *sv; // result scalar	386	SV *sv; // result scalar
93	U32 flags; // F_*	387	JSON json;
94	U32 indent; // indentation level	388	U32 indent; // indentation level
95	U32 maxdepth; // max. indentation/recursion level	389	UV limit; // escape character values >= this value when encoding
96	} enc_t;	390	} enc_t;
97		391
98	static void	392	INLINE void
99	need (enc_t *enc, STRLEN len)	393	need (enc_t *enc, STRLEN len)
100	{	394	{
101	if (enc->cur + len >= enc->end)	395	if (expect_false ((uintptr_t)(enc->end - enc->cur) < len))
102	{	396	{
103	STRLEN cur = enc->cur - SvPVX (enc->sv);	397	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
104	SvGROW (enc->sv, cur + len + 1);	398	char *buf = json_sv_grow (enc->sv, cur, len);
105	enc->cur = SvPVX (enc->sv) + cur;	399	enc->cur = buf + cur;
106	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv);	400	enc->end = buf + SvLEN (enc->sv) - 1;
107	}	401	}
108	}	402	}
109		403
110	static void	404	INLINE void
111	encode_ch (enc_t *enc, char ch)	405	encode_ch (enc_t *enc, char ch)
112	{	406	{
113	need (enc, 1);	407	need (enc, 1);
114	*enc->cur++ = ch;	408	*enc->cur++ = ch;
115	}	409	}
…		…
123		417
124	while (str < end)	418	while (str < end)
125	{	419	{
126	unsigned char ch = *(unsigned char *)str;	420	unsigned char ch = *(unsigned char *)str;
127		421
128	if (ch >= 0x20 && ch < 0x80) // most common case	422	if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case
129	{	423	{
130	if (ch == '"') // but with slow exceptions	424	if (expect_false (ch == '"')) // but with slow exceptions
131	{	425	{
132	need (enc, len += 1);	426	need (enc, len + 1);
133	*enc->cur++ = '\\';	427	*enc->cur++ = '\\';
134	*enc->cur++ = '"';	428	*enc->cur++ = '"';
135	}	429	}
136	else if (ch == '\\')	430	else if (expect_false (ch == '\\'))
137	{	431	{
138	need (enc, len += 1);	432	need (enc, len + 1);
139	*enc->cur++ = '\\';	433	*enc->cur++ = '\\';
140	*enc->cur++ = '\\';	434	*enc->cur++ = '\\';
141	}	435	}
142	else	436	else
143	*enc->cur++ = ch;	437	*enc->cur++ = ch;
…		…
146	}	440	}
147	else	441	else
148	{	442	{
149	switch (ch)	443	switch (ch)
150	{	444	{
151	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;
152	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;
153	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;
154	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;
155	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;
156		450
157	default:	451	default:
158	{	452	{
159	STRLEN clen;	453	STRLEN clen;
160	UV uch;	454	UV uch;
161		455
162	if (is_utf8)	456	if (is_utf8)
163	{	457	{
164	//uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY);
165	uch = decode_utf8 (str, end - str, &clen);	458	uch = decode_utf8 (str, end - str, &clen);
166	if (clen == (STRLEN)-1)	459	if (clen == (STRLEN)-1)
167	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);
168	}	461	}
169	else	462	else
170	{	463	{
171	uch = ch;	464	uch = ch;
172	clen = 1;	465	clen = 1;
173	}	466	}
174		467
175	if (uch > 0x10FFFFUL)	468	if (uch < 0x80/*0x20*/ || uch >= enc->limit)
176	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
177
178	if (uch < 0x80 || enc->flags & F_ASCII)
179	{	469	{
180	if (uch > 0xFFFFUL)	470	if (uch >= 0x10000UL)
181	{	471	{
		472	if (uch >= 0x110000UL)
		473	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
		474
182	need (enc, len += 11);	475	need (enc, len + 11);
183	sprintf (enc->cur, "\\u%04x\\u%04x",	476	sprintf (enc->cur, "\\u%04x\\u%04x",
184	(int)((uch - 0x10000) / 0x400 + 0xD800),	477	(int)((uch - 0x10000) / 0x400 + 0xD800),
185	(int)((uch - 0x10000) % 0x400 + 0xDC00));	478	(int)((uch - 0x10000) % 0x400 + 0xDC00));
186	enc->cur += 12;	479	enc->cur += 12;
187	}	480	}
188	else	481	else
189	{	482	{
190	static char hexdigit [16] = "0123456789abcdef";
191	need (enc, len += 5);	483	need (enc, len + 5);
192	*enc->cur++ = '\\';	484	*enc->cur++ = '\\';
193	*enc->cur++ = 'u';	485	*enc->cur++ = 'u';
194	*enc->cur++ = hexdigit [ uch >> 12 ];	486	*enc->cur++ = PL_hexdigit [ uch >> 12 ];
195	*enc->cur++ = hexdigit [(uch >> 8) & 15];	487	*enc->cur++ = PL_hexdigit [(uch >> 8) & 15];
196	*enc->cur++ = hexdigit [(uch >> 4) & 15];	488	*enc->cur++ = PL_hexdigit [(uch >> 4) & 15];
197	*enc->cur++ = hexdigit [(uch >> 0) & 15];	489	*enc->cur++ = PL_hexdigit [(uch >> 0) & 15];
198	}	490	}
199		491
		492	str += clen;
		493	}
		494	else if (enc->json.flags & F_LATIN1)
		495	{
		496	*enc->cur++ = uch;
200	str += clen;	497	str += clen;
201	}	498	}
202	else if (is_utf8)	499	else if (is_utf8)
203	{	500	{
204	need (enc, len += clen);	501	need (enc, len + clen);
205	do	502	do
206	{	503	{
207	*enc->cur++ = *str++;	504	*enc->cur++ = *str++;
208	}	505	}
209	while (--clen);	506	while (--clen);
210	}	507	}
211	else	508	else
212	{	509	{
213	need (enc, len += UTF8_MAX_LEN - 1); // never more than 11 bytes needed	510	need (enc, len + UTF8_MAXBYTES - 1); // never more than 11 bytes needed
214	enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0);	511	enc->cur = encode_utf8 (enc->cur, uch);
215	++str;	512	++str;
216	}	513	}
217	}	514	}
218	}	515	}
219	}	516	}
220		517
221	--len;	518	--len;
222	}	519	}
223	}	520	}
224		521
225	static void	522	INLINE void
226	encode_indent (enc_t *enc)	523	encode_indent (enc_t *enc)
227	{	524	{
228	if (enc->flags & F_INDENT)	525	if (enc->json.flags & F_INDENT)
229	{	526	{
230	int spaces = enc->indent * INDENT_STEP;	527	int spaces = enc->indent * INDENT_STEP;
231		528
232	need (enc, spaces);	529	need (enc, spaces);
233	memset (enc->cur, ' ', spaces);	530	memset (enc->cur, ' ', spaces);
234	enc->cur += spaces;	531	enc->cur += spaces;
235	}	532	}
236	}	533	}
237		534
238	static void	535	INLINE void
239	encode_space (enc_t *enc)	536	encode_space (enc_t *enc)
240	{	537	{
241	need (enc, 1);	538	need (enc, 1);
242	encode_ch (enc, ' ');	539	encode_ch (enc, ' ');
243	}	540	}
244		541
245	static void	542	INLINE void
246	encode_nl (enc_t *enc)	543	encode_nl (enc_t *enc)
247	{	544	{
248	if (enc->flags & F_INDENT)	545	if (enc->json.flags & F_INDENT)
249	{	546	{
250	need (enc, 1);	547	need (enc, 1);
251	encode_ch (enc, '\n');	548	encode_ch (enc, '\n');
252	}	549	}
253	}	550	}
254		551
255	static void	552	INLINE void
256	encode_comma (enc_t *enc)	553	encode_comma (enc_t *enc)
257	{	554	{
258	encode_ch (enc, ',');	555	encode_ch (enc, ',');
259		556
260	if (enc->flags & F_INDENT)	557	if (enc->json.flags & F_INDENT)
261	encode_nl (enc);	558	encode_nl (enc);
262	else if (enc->flags & F_SPACE_AFTER)	559	else if (enc->json.flags & F_SPACE_AFTER)
263	encode_space (enc);	560	encode_space (enc);
264	}	561	}
265		562
266	static void encode_sv (enc_t *enc, SV *sv);	563	static void encode_sv (enc_t *enc, SV *sv);
267		564
268	static void	565	static void
269	encode_av (enc_t *enc, AV *av)	566	encode_av (enc_t *enc, AV *av)
270	{	567	{
271	int i, len = av_len (av);	568	int i, len = av_len (av);
272		569
273	encode_ch (enc, '['); encode_nl (enc);	570	if (enc->indent >= enc->json.max_depth)
274	++enc->indent;	571	croak (ERR_NESTING_EXCEEDED);
275		572
		573	encode_ch (enc, '[');
		574
		575	if (len >= 0)
		576	{
		577	encode_nl (enc); ++enc->indent;
		578
276	for (i = 0; i <= len; ++i)	579	for (i = 0; i <= len; ++i)
277	{	580	{
		581	SV **svp = av_fetch (av, i, 0);
		582
278	encode_indent (enc);	583	encode_indent (enc);
279	encode_sv (enc, *av_fetch (av, i, 0));
280		584
		585	if (svp)
		586	encode_sv (enc, *svp);
		587	else
		588	encode_str (enc, "null", 4, 0);
		589
281	if (i < len)	590	if (i < len)
282	encode_comma (enc);	591	encode_comma (enc);
283	}	592	}
284		593
		594	encode_nl (enc); --enc->indent; encode_indent (enc);
		595	}
		596
285	encode_nl (enc);	597	encode_ch (enc, ']');
286
287	--enc->indent;
288	encode_indent (enc); encode_ch (enc, ']');
289	}	598	}
290		599
291	static void	600	static void
292	encode_he (enc_t *enc, HE *he)	601	encode_hk (enc_t *enc, HE *he)
293	{	602	{
294	encode_ch (enc, '"');	603	encode_ch (enc, '"');
295		604
296	if (HeKLEN (he) == HEf_SVKEY)	605	if (HeKLEN (he) == HEf_SVKEY)
297	{	606	{
298	SV *sv = HeSVKEY (he);	607	SV *sv = HeSVKEY (he);
299	STRLEN len;	608	STRLEN len;
300	char *str;	609	char *str;
301		610
302	SvGETMAGIC (sv);	611	SvGETMAGIC (sv);
303	str = SvPV (sv, len);	612	str = SvPV (sv, len);
304		613
305	encode_str (enc, str, len, SvUTF8 (sv));	614	encode_str (enc, str, len, SvUTF8 (sv));
306	}	615	}
307	else	616	else
308	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));	617	encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));
309		618
310	encode_ch (enc, '"');	619	encode_ch (enc, '"');
311		620
312	if (enc->flags & F_SPACE_BEFORE) encode_space (enc);	621	if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);
313	encode_ch (enc, ':');	622	encode_ch (enc, ':');
314	if (enc->flags & F_SPACE_AFTER ) encode_space (enc);	623	if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);
315	encode_sv (enc, HeVAL (he));
316	}	624	}
317		625
318	// compare hash entries, used when all keys are bytestrings	626	// compare hash entries, used when all keys are bytestrings
319	static int	627	static int
320	he_cmp_fast (const void *a_, const void *b_)	628	he_cmp_fast (const void *a_, const void *b_)
…		…
325	HE *b = *(HE **)b_;	633	HE *b = *(HE **)b_;
326		634
327	STRLEN la = HeKLEN (a);	635	STRLEN la = HeKLEN (a);
328	STRLEN lb = HeKLEN (b);	636	STRLEN lb = HeKLEN (b);
329		637
330	if (!(cmp = memcmp (HeKEY (a), HeKEY (b), la < lb ? la : lb)))	638	if (!(cmp = memcmp (HeKEY (b), HeKEY (a), lb < la ? lb : la)))
331	cmp = la - lb;	639	cmp = lb - la;
332		640
333	return cmp;	641	return cmp;
334	}	642	}
335		643
336	// 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
337	static int	645	static int
338	he_cmp_slow (const void *a, const void *b)	646	he_cmp_slow (const void *a, const void *b)
339	{	647	{
340	return sv_cmp (HeSVKEY_force (*(HE **)a), HeSVKEY_force (*(HE **)b));	648	return sv_cmp (HeSVKEY_force (*(HE **)b), HeSVKEY_force (*(HE **)a));
341	}	649	}
342		650
343	static void	651	static void
344	encode_hv (enc_t *enc, HV *hv)	652	encode_hv (enc_t *enc, HV *hv)
345	{	653	{
346	int count, i;	654	HE *he;
347		655
348	encode_ch (enc, '{'); encode_nl (enc); ++enc->indent;	656	if (enc->indent >= enc->json.max_depth)
		657	croak (ERR_NESTING_EXCEEDED);
349		658
350	if ((count = hv_iterinit (hv)))	659	encode_ch (enc, '{');
351	{	660
352	// for canonical output we have to sort by keys first	661	// for canonical output we have to sort by keys first
353	// actually, this is mostly due to the stupid so-called	662	// actually, this is mostly due to the stupid so-called
354	// security workaround added somewhere in 5.8.x.	663	// security workaround added somewhere in 5.8.x
355	// that randomises hash orderings	664	// that randomises hash orderings
356	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))
357	{	670	{
358	HE *he, *hes [count]; // if your compiler dies here, you need to enable C99 mode	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	{
359	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	}
360		695
361	i = 0;	696	i = 0;
362	while ((he = hv_iternext (hv)))	697	while ((he = hv_iternext (hv)))
363	{	698	{
364	hes [i++] = he;	699	hes [i++] = he;
…		…
386		721
387	FREETMPS;	722	FREETMPS;
388	LEAVE;	723	LEAVE;
389	}	724	}
390		725
391	for (i = 0; i < count; ++i)	726	encode_nl (enc); ++enc->indent;
		727
		728	while (count--)
392	{	729	{
393	encode_indent (enc);	730	encode_indent (enc);
		731	he = hes [count];
394	encode_he (enc, hes [i]);	732	encode_hk (enc, he);
		733	encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
395		734
396	if (i < count - 1)	735	if (count)
397	encode_comma (enc);	736	encode_comma (enc);
398	}	737	}
399		738
400	encode_nl (enc);	739	encode_nl (enc); --enc->indent; encode_indent (enc);
401	}	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	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	if (count)
		815	{
		816	int i;
		817
		818	for (i = 0; i < count - 1; ++i)
		819	{
		820	encode_sv (enc, SP[i + 1 - count]);
		821	encode_ch (enc, ',');
		822	}
		823
		824	encode_sv (enc, TOPs);
		825	SP -= count;
		826	}
		827
		828	encode_ch (enc, ']');
		829
		830	FREETMPS; LEAVE;
		831	}
		832	else if ((enc->json.flags & F_CONV_BLESSED) && (method = gv_fetchmethod_autoload (stash, "TO_JSON", 0)))
		833	{
		834	dSP;
		835
		836	ENTER; SAVETMPS;
		837	PUSHMARK (SP);
		838	// we re-bless the reference to get overload and other niceties right
		839	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		840
		841	// calling with G_SCALAR ensures that we always get a 1 return value
		842	PUTBACK;
		843	call_sv ((SV *)GvCV (method), G_SCALAR);
		844	SPAGAIN;
		845
		846	// catch this surprisingly common error
		847	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		848	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		849
		850	sv = POPs;
		851	PUTBACK;
		852
		853	encode_sv (enc, sv);
		854
		855	FREETMPS; LEAVE;
		856	}
		857	else if (enc->json.flags & F_ALLOW_BLESSED)
		858	encode_str (enc, "null", 4, 0);
402	else	859	else
403	{	860	croak ("encountered object '%s', but neither allow_blessed, convert_blessed nor allow_tags settings are enabled (or TO_JSON/FREEZE method missing)",
404	SV *sv;	861	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
405	HE *he = hv_iternext (hv);	862	}
406		863	else if (svt == SVt_PVHV)
407	for (;;)	864	encode_hv (enc, (HV *)sv);
408	{	865	else if (svt == SVt_PVAV)
409	encode_indent (enc);	866	encode_av (enc, (AV *)sv);
410	encode_he (enc, he);	867	else if (svt < SVt_PVAV)
411
412	if (!(he = hv_iternext (hv)))
413	break;
414
415	encode_comma (enc);
416	}
417
418	encode_nl (enc);
419	}
420	}	868	{
		869	int bool_type = ref_bool_type (sv);
421		870
422	--enc->indent; encode_indent (enc); encode_ch (enc, '}');	871	if (bool_type == 1)
		872	encode_str (enc, "true", 4, 0);
		873	else if (bool_type == 0)
		874	encode_str (enc, "false", 5, 0);
		875	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		876	encode_str (enc, "null", 4, 0);
		877	else
		878	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
		879	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
		880	}
		881	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		882	encode_str (enc, "null", 4, 0);
		883	else
		884	croak ("encountered %s, but JSON can only represent references to arrays or hashes",
		885	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
423	}	886	}
424		887
425	static void	888	static void
426	encode_sv (enc_t *enc, SV *sv)	889	encode_sv (enc_t *enc, SV *sv)
427	{	890	{
…		…
435	encode_str (enc, str, len, SvUTF8 (sv));	898	encode_str (enc, str, len, SvUTF8 (sv));
436	encode_ch (enc, '"');	899	encode_ch (enc, '"');
437	}	900	}
438	else if (SvNOKp (sv))	901	else if (SvNOKp (sv))
439	{	902	{
		903	// trust that perl will do the right thing w.r.t. JSON syntax.
440	need (enc, NV_DIG + 32);	904	need (enc, NV_DIG + 32);
441	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);	905	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
442	enc->cur += strlen (enc->cur);	906	enc->cur += strlen (enc->cur);
443	}	907	}
444	else if (SvIOKp (sv))	908	else if (SvIOKp (sv))
445	{	909	{
		910	// we assume we can always read an IV as a UV and vice versa
		911	// we assume two's complement
		912	// we assume no aliasing issues in the union
		913	if (SvIsUV (sv) ? SvUVX (sv) <= 59000
		914	: SvIVX (sv) <= 59000 && SvIVX (sv) >= -59000)
		915	{
		916	// optimise the "small number case"
		917	// code will likely be branchless and use only a single multiplication
		918	// works for numbers up to 59074
		919	I32 i = SvIVX (sv);
		920	U32 u;
		921	char digit, nz = 0;
		922
446	need (enc, 64);	923	need (enc, 6);
		924
		925	*enc->cur = '-'; enc->cur += i < 0 ? 1 : 0;
		926	u = i < 0 ? -i : i;
		927
		928	// convert to 4.28 fixed-point representation
		929	u = u * ((0xfffffff + 10000) / 10000); // 10**5, 5 fractional digits
		930
		931	// now output digit by digit, each time masking out the integer part
		932	// and multiplying by 5 while moving the decimal point one to the right,
		933	// resulting in a net multiplication by 10.
		934	// we always write the digit to memory but conditionally increment
		935	// the pointer, to enable the use of conditional move instructions.
		936	digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffffUL) * 5;
		937	digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffffUL) * 5;
		938	digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffffUL) * 5;
		939	digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffffUL) * 5;
		940	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
		941	}
		942	else
		943	{
		944	// large integer, use the (rather slow) snprintf way.
		945	need (enc, IVUV_MAXCHARS);
447	enc->cur +=	946	enc->cur +=
448	SvIsUV(sv)	947	SvIsUV(sv)
449	? snprintf (enc->cur, 64, "%"UVuf, (UV)SvUVX (sv))	948	? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv))
450	: snprintf (enc->cur, 64, "%"IVdf, (IV)SvIVX (sv));	949	: snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv));
		950	}
451	}	951	}
452	else if (SvROK (sv))	952	else if (SvROK (sv))
453	{	953	encode_rv (enc, SvRV (sv));
454	SV *rv = SvRV (sv);	954	else if (!SvOK (sv) || enc->json.flags & F_ALLOW_UNKNOWN)
455
456	if (enc->indent >= enc->maxdepth)
457	croak ("data structure too deep (hit recursion limit)");
458
459	switch (SvTYPE (rv))
460	{
461	case SVt_PVAV: encode_av (enc, (AV *)rv); break;
462	case SVt_PVHV: encode_hv (enc, (HV *)rv); break;
463
464	default:
465	croak ("encountered %s, but JSON can only represent references to arrays or hashes",
466	SvPV_nolen (sv));
467	}
468	}
469	else if (!SvOK (sv))
470	encode_str (enc, "null", 4, 0);	955	encode_str (enc, "null", 4, 0);
471	else	956	else
472	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",	957	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, check your input data",
473	SvPV_nolen (sv), SvFLAGS (sv));	958	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
474	}	959	}
475		960
476	static SV *	961	static SV *
477	encode_json (SV *scalar, U32 flags)	962	encode_json (SV *scalar, JSON *json)
478	{	963	{
		964	enc_t enc;
		965
479	if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar))	966	if (!(json->flags & F_ALLOW_NONREF) && json_nonref (scalar))
480	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");	967	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
481		968
482	enc_t enc;	969	enc.json = *json;
483	enc.flags = flags;
484	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	970	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
485	enc.cur = SvPVX (enc.sv);	971	enc.cur = SvPVX (enc.sv);
486	enc.end = SvEND (enc.sv);	972	enc.end = SvEND (enc.sv);
487	enc.indent = 0;	973	enc.indent = 0;
488	enc.maxdepth = DEC_DEPTH (flags);	974	enc.limit = enc.json.flags & F_ASCII ? 0x000080UL
		975	: enc.json.flags & F_LATIN1 ? 0x000100UL
		976	: 0x110000UL;
489		977
490	SvPOK_only (enc.sv);	978	SvPOK_only (enc.sv);
491	encode_sv (&enc, scalar);	979	encode_sv (&enc, scalar);
		980	encode_nl (&enc);
492		981
		982	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
		983	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
		984
493	if (!(flags & (F_ASCII | F_UTF8)))	985	if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8)))
494	SvUTF8_on (enc.sv);	986	SvUTF8_on (enc.sv);
495		987
496	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
497
498	if (enc.flags & F_SHRINK)	988	if (enc.json.flags & F_SHRINK)
499	shrink (enc.sv);	989	shrink (enc.sv);
500		990
501	return enc.sv;	991	return enc.sv;
502	}	992	}
503		993
…		…
508	typedef struct	998	typedef struct
509	{	999	{
510	char *cur; // current parser pointer	1000	char *cur; // current parser pointer
511	char *end; // end of input string	1001	char *end; // end of input string
512	const char *err; // parse error, if != 0	1002	const char *err; // parse error, if != 0
513	U32 flags; // F_*	1003	JSON json;
514	U32 depth; // recursion depth	1004	U32 depth; // recursion depth
515	U32 maxdepth; // recursion depth limit	1005	U32 maxdepth; // recursion depth limit
516	} dec_t;	1006	} dec_t;
517		1007
518	static void	1008	INLINE void
		1009	decode_comment (dec_t *dec)
		1010	{
		1011	// only '#'-style comments allowed a.t.m.
		1012
		1013	while (*dec->cur && *dec->cur != 0x0a && *dec->cur != 0x0d)
		1014	++dec->cur;
		1015	}
		1016
		1017	INLINE void
519	decode_ws (dec_t *dec)	1018	decode_ws (dec_t *dec)
520	{	1019	{
521	for (;;)	1020	for (;;)
522	{	1021	{
523	char ch = *dec->cur;	1022	char ch = *dec->cur;
524		1023
525	if (ch > 0x20	1024	if (ch > 0x20)
		1025	{
		1026	if (expect_false (ch == '#'))
		1027	{
		1028	if (dec->json.flags & F_RELAXED)
		1029	decode_comment (dec);
		1030	else
		1031	break;
		1032	}
		1033	else
		1034	break;
		1035	}
526	|| (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09))	1036	else if (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)
527	break;	1037	break; // parse error, but let higher level handle it, gives better error messages
528		1038
529	++dec->cur;	1039	++dec->cur;
530	}	1040	}
531	}	1041	}
532		1042
…		…
536	if (*dec->cur != ch) \	1046	if (*dec->cur != ch) \
537	ERR (# ch " expected"); \	1047	ERR (# ch " expected"); \
538	++dec->cur; \	1048	++dec->cur; \
539	SE	1049	SE
540		1050
541	#define DEC_INC_DEPTH if (++dec->depth > dec->maxdepth) ERR ("json datastructure exceeds maximum nesting level (set a higher max_depth)")	1051	#define DEC_INC_DEPTH if (++dec->depth > dec->json.max_depth) ERR (ERR_NESTING_EXCEEDED)
542	#define DEC_DEC_DEPTH --dec->depth	1052	#define DEC_DEC_DEPTH --dec->depth
543		1053
544	static SV *decode_sv (dec_t *dec);	1054	static SV *decode_sv (dec_t *dec);
545		1055
546	static signed char decode_hexdigit[256];	1056	static signed char decode_hexdigit[256];
…		…
549	decode_4hex (dec_t *dec)	1059	decode_4hex (dec_t *dec)
550	{	1060	{
551	signed char d1, d2, d3, d4;	1061	signed char d1, d2, d3, d4;
552	unsigned char *cur = (unsigned char *)dec->cur;	1062	unsigned char *cur = (unsigned char *)dec->cur;
553		1063
554	d1 = decode_hexdigit [cur [0]]; if (d1 < 0) ERR ("four hexadecimal digits expected");	1064	d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("exactly four hexadecimal digits expected");
555	d2 = decode_hexdigit [cur [1]]; if (d2 < 0) ERR ("four hexadecimal digits expected");	1065	d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("exactly four hexadecimal digits expected");
556	d3 = decode_hexdigit [cur [2]]; if (d3 < 0) ERR ("four hexadecimal digits expected");	1066	d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("exactly four hexadecimal digits expected");
557	d4 = decode_hexdigit [cur [3]]; if (d4 < 0) ERR ("four hexadecimal digits expected");	1067	d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("exactly four hexadecimal digits expected");
558		1068
559	dec->cur += 4;	1069	dec->cur += 4;
560		1070
561	return ((UV)d1) << 12	1071	return ((UV)d1) << 12
562	| ((UV)d2) << 8	1072	| ((UV)d2) << 8
…		…
570	static SV *	1080	static SV *
571	decode_str (dec_t *dec)	1081	decode_str (dec_t *dec)
572	{	1082	{
573	SV *sv = 0;	1083	SV *sv = 0;
574	int utf8 = 0;	1084	int utf8 = 0;
		1085	char *dec_cur = dec->cur;
575		1086
576	do	1087	do
577	{	1088	{
578	char buf [SHORT_STRING_LEN + UTF8_MAX_LEN];	1089	char buf [SHORT_STRING_LEN + UTF8_MAXBYTES];
579	char *cur = buf;	1090	char *cur = buf;
580		1091
581	do	1092	do
582	{	1093	{
583	unsigned char ch = *(unsigned char *)dec->cur++;	1094	unsigned char ch = *(unsigned char *)dec_cur++;
584		1095
585	if (ch == '"')	1096	if (expect_false (ch == '"'))
586	{	1097	{
587	--dec->cur;	1098	--dec_cur;
588	break;	1099	break;
589	}	1100	}
590	else if (ch == '\\')	1101	else if (expect_false (ch == '\\'))
591	{	1102	{
592	switch (*dec->cur)	1103	switch (*dec_cur)
593	{	1104	{
594	case '\\':	1105	case '\\':
595	case '/':	1106	case '/':
596	case '"': *cur++ = *dec->cur++; break;	1107	case '"': *cur++ = *dec_cur++; break;
597		1108
598	case 'b': ++dec->cur; *cur++ = '\010'; break;	1109	case 'b': ++dec_cur; *cur++ = '\010'; break;
599	case 't': ++dec->cur; *cur++ = '\011'; break;	1110	case 't': ++dec_cur; *cur++ = '\011'; break;
600	case 'n': ++dec->cur; *cur++ = '\012'; break;	1111	case 'n': ++dec_cur; *cur++ = '\012'; break;
601	case 'f': ++dec->cur; *cur++ = '\014'; break;	1112	case 'f': ++dec_cur; *cur++ = '\014'; break;
602	case 'r': ++dec->cur; *cur++ = '\015'; break;	1113	case 'r': ++dec_cur; *cur++ = '\015'; break;
603		1114
604	case 'u':	1115	case 'u':
605	{	1116	{
606	UV lo, hi;	1117	UV lo, hi;
607	++dec->cur;	1118	++dec_cur;
608		1119
		1120	dec->cur = dec_cur;
609	hi = decode_4hex (dec);	1121	hi = decode_4hex (dec);
		1122	dec_cur = dec->cur;
610	if (hi == (UV)-1)	1123	if (hi == (UV)-1)
611	goto fail;	1124	goto fail;
612		1125
613	// possibly a surrogate pair	1126	// possibly a surrogate pair
614	if (hi >= 0xd800)	1127	if (hi >= 0xd800)
615	if (hi < 0xdc00)	1128	if (hi < 0xdc00)
616	{	1129	{
617	if (dec->cur [0] != '\\' || dec->cur [1] != 'u')	1130	if (dec_cur [0] != '\\' || dec_cur [1] != 'u')
618	ERR ("missing low surrogate character in surrogate pair");	1131	ERR ("missing low surrogate character in surrogate pair");
619		1132
620	dec->cur += 2;	1133	dec_cur += 2;
621		1134
		1135	dec->cur = dec_cur;
622	lo = decode_4hex (dec);	1136	lo = decode_4hex (dec);
		1137	dec_cur = dec->cur;
623	if (lo == (UV)-1)	1138	if (lo == (UV)-1)
624	goto fail;	1139	goto fail;
625		1140
626	if (lo < 0xdc00 || lo >= 0xe000)	1141	if (lo < 0xdc00 || lo >= 0xe000)
627	ERR ("surrogate pair expected");	1142	ERR ("surrogate pair expected");
…		…
633		1148
634	if (hi >= 0x80)	1149	if (hi >= 0x80)
635	{	1150	{
636	utf8 = 1;	1151	utf8 = 1;
637		1152
638	cur = (char *)uvuni_to_utf8_flags (cur, hi, 0);	1153	cur = encode_utf8 (cur, hi);
639	}	1154	}
640	else	1155	else
641	*cur++ = hi;	1156	*cur++ = hi;
642	}	1157	}
643	break;	1158	break;
644		1159
645	default:	1160	default:
646	--dec->cur;	1161	--dec_cur;
647	ERR ("illegal backslash escape sequence in string");	1162	ERR ("illegal backslash escape sequence in string");
648	}	1163	}
649	}	1164	}
650	else if (ch >= 0x20 && ch <= 0x7f)	1165	else if (expect_true (ch >= 0x20 && ch < 0x80))
651	*cur++ = ch;	1166	*cur++ = ch;
652	else if (ch >= 0x80)	1167	else if (ch >= 0x80)
653	{	1168	{
654	--dec->cur;
655
656	STRLEN clen;	1169	STRLEN clen;
		1170
		1171	--dec_cur;
		1172
657	UV uch = decode_utf8 (dec->cur, dec->end - dec->cur, &clen);	1173	decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
658	if (clen == (STRLEN)-1)	1174	if (clen == (STRLEN)-1)
659	ERR ("malformed UTF-8 character in JSON string");	1175	ERR ("malformed UTF-8 character in JSON string");
660		1176
661	do	1177	do
662	{
663	*cur++ = *dec->cur++;	1178	*cur++ = *dec_cur++;
664	}
665	while (--clen);	1179	while (--clen);
666		1180
667	utf8 = 1;	1181	utf8 = 1;
668	}	1182	}
669	else if (!ch)	1183	else if (ch == '\t' && dec->json.flags & F_RELAXED)
670	ERR ("unexpected end of string while parsing json string");	1184	*cur++ = ch;
671	else	1185	else
		1186	{
		1187	--dec_cur;
		1188
		1189	if (!ch)
		1190	ERR ("unexpected end of string while parsing JSON string");
		1191	else
672	ERR ("invalid character encountered");	1192	ERR ("invalid character encountered while parsing JSON string");
673		1193	}
674	}	1194	}
675	while (cur < buf + SHORT_STRING_LEN);	1195	while (cur < buf + SHORT_STRING_LEN);
676		1196
		1197	{
677	STRLEN len = cur - buf;	1198	STRLEN len = cur - buf;
678		1199
679	if (sv)	1200	if (sv)
680	{	1201	{
681	SvGROW (sv, SvCUR (sv) + len + 1);	1202	STRLEN cur = SvCUR (sv);
		1203
		1204	if (SvLEN (sv) - cur <= len)
		1205	json_sv_grow (sv, cur, len);
		1206
682	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);	1207	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);
683	SvCUR_set (sv, SvCUR (sv) + len);	1208	SvCUR_set (sv, SvCUR (sv) + len);
684	}	1209	}
685	else	1210	else
686	sv = newSVpvn (buf, len);	1211	sv = newSVpvn (buf, len);
687	}	1212	}
		1213	}
688	while (*dec->cur != '"');	1214	while (*dec_cur != '"');
689		1215
690	++dec->cur;	1216	++dec_cur;
691		1217
692	if (sv)	1218	if (sv)
693	{	1219	{
694	SvPOK_only (sv);	1220	SvPOK_only (sv);
695	*SvEND (sv) = 0;	1221	*SvEND (sv) = 0;
…		…
698	SvUTF8_on (sv);	1224	SvUTF8_on (sv);
699	}	1225	}
700	else	1226	else
701	sv = newSVpvn ("", 0);	1227	sv = newSVpvn ("", 0);
702		1228
		1229	dec->cur = dec_cur;
703	return sv;	1230	return sv;
704		1231
705	fail:	1232	fail:
		1233	dec->cur = dec_cur;
706	return 0;	1234	return 0;
707	}	1235	}
708		1236
709	static SV *	1237	static SV *
710	decode_num (dec_t *dec)	1238	decode_num (dec_t *dec)
…		…
768	is_nv = 1;	1296	is_nv = 1;
769	}	1297	}
770		1298
771	if (!is_nv)	1299	if (!is_nv)
772	{	1300	{
773	UV uv;	1301	int len = dec->cur - start;
774	int numtype = grok_number (start, dec->cur - start, &uv);	1302
775	if (numtype & IS_NUMBER_IN_UV)	1303	// special case the rather common 1..5-digit-int case
776	if (numtype & IS_NUMBER_NEG)	1304	if (*start == '-')
		1305	switch (len)
777	{	1306	{
778	if (uv < (UV)IV_MIN)	1307	case 2: return newSViv (-(IV)( start [1] - '0' * 1));
779	return newSViv (-(IV)uv);	1308	case 3: return newSViv (-(IV)( start [1] * 10 + start [2] - '0' * 11));
		1309	case 4: return newSViv (-(IV)( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
		1310	case 5: return newSViv (-(IV)( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
		1311	case 6: return newSViv (-(IV)(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));
780	}	1312	}
		1313	else
		1314	switch (len)
		1315	{
		1316	case 1: return newSViv ( start [0] - '0' * 1);
		1317	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
		1318	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
		1319	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
		1320	case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);
		1321	}
		1322
		1323	{
		1324	UV uv;
		1325	int numtype = grok_number (start, len, &uv);
		1326	if (numtype & IS_NUMBER_IN_UV)
		1327	if (numtype & IS_NUMBER_NEG)
		1328	{
		1329	if (uv < (UV)IV_MIN)
		1330	return newSViv (-(IV)uv);
		1331	}
781	else	1332	else
782	return newSVuv (uv);	1333	return newSVuv (uv);
783	}	1334	}
784		1335
		1336	len -= *start == '-' ? 1 : 0;
		1337
		1338	// does not fit into IV or UV, try NV
		1339	if (len <= NV_DIG)
		1340	// fits into NV without loss of precision
		1341	return newSVnv (json_atof (start));
		1342
		1343	// everything else fails, convert it to a string
		1344	return newSVpvn (start, dec->cur - start);
		1345	}
		1346
		1347	// loss of precision here
785	return newSVnv (Atof (start));	1348	return newSVnv (json_atof (start));
786		1349
787	fail:	1350	fail:
788	return 0;	1351	return 0;
789	}	1352	}
790		1353
…		…
814	if (*dec->cur == ']')	1377	if (*dec->cur == ']')
815	{	1378	{
816	++dec->cur;	1379	++dec->cur;
817	break;	1380	break;
818	}	1381	}
819		1382
820	if (*dec->cur != ',')	1383	if (*dec->cur != ',')
821	ERR (", or ] expected while parsing array");	1384	ERR (", or ] expected while parsing array");
822		1385
823	++dec->cur;	1386	++dec->cur;
		1387
		1388	decode_ws (dec);
		1389
		1390	if (*dec->cur == ']' && dec->json.flags & F_RELAXED)
		1391	{
		1392	++dec->cur;
		1393	break;
		1394	}
824	}	1395	}
825		1396
826	DEC_DEC_DEPTH;	1397	DEC_DEC_DEPTH;
827	return newRV_noinc ((SV *)av);	1398	return newRV_noinc ((SV *)av);
828		1399
…		…
833	}	1404	}
834		1405
835	static SV *	1406	static SV *
836	decode_hv (dec_t *dec)	1407	decode_hv (dec_t *dec)
837	{	1408	{
		1409	SV *sv;
838	HV *hv = newHV ();	1410	HV *hv = newHV ();
839		1411
840	DEC_INC_DEPTH;	1412	DEC_INC_DEPTH;
841	decode_ws (dec);	1413	decode_ws (dec);
842		1414
843	if (*dec->cur == '}')	1415	if (*dec->cur == '}')
844	++dec->cur;	1416	++dec->cur;
845	else	1417	else
846	for (;;)	1418	for (;;)
847	{	1419	{
		1420	EXPECT_CH ('"');
		1421
		1422	// heuristic: assume that
		1423	// a) decode_str + hv_store_ent are abysmally slow.
		1424	// b) most hash keys are short, simple ascii text.
		1425	// => try to "fast-match" such strings to avoid
		1426	// the overhead of decode_str + hv_store_ent.
		1427	{
848	SV *key, *value;	1428	SV *value;
		1429	char *p = dec->cur;
		1430	char *e = p + 24; // only try up to 24 bytes
849		1431
850	decode_ws (dec); EXPECT_CH ('"');	1432	for (;;)
851
852	key = decode_str (dec);
853	if (!key)
854	goto fail;
855
856	decode_ws (dec); EXPECT_CH (':');
857
858	value = decode_sv (dec);
859	if (!value)
860	{	1433	{
		1434	// the >= 0x80 is false on most architectures
		1435	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
		1436	{
		1437	// slow path, back up and use decode_str
		1438	SV *key = decode_str (dec);
		1439	if (!key)
		1440	goto fail;
		1441
		1442	decode_ws (dec); EXPECT_CH (':');
		1443
		1444	decode_ws (dec);
		1445	value = decode_sv (dec);
		1446	if (!value)
		1447	{
		1448	SvREFCNT_dec (key);
		1449	goto fail;
		1450	}
		1451
		1452	hv_store_ent (hv, key, value, 0);
861	SvREFCNT_dec (key);	1453	SvREFCNT_dec (key);
		1454
		1455	break;
		1456	}
		1457	else if (*p == '"')
		1458	{
		1459	// fast path, got a simple key
		1460	char *key = dec->cur;
		1461	int len = p - key;
		1462	dec->cur = p + 1;
		1463
		1464	decode_ws (dec); EXPECT_CH (':');
		1465
		1466	decode_ws (dec);
		1467	value = decode_sv (dec);
		1468	if (!value)
862	goto fail;	1469	goto fail;
		1470
		1471	hv_store (hv, key, len, value, 0);
		1472
		1473	break;
		1474	}
		1475
		1476	++p;
863	}	1477	}
864		1478	}
865	hv_store_ent (hv, key, value, 0);
866	SvREFCNT_dec (key);
867		1479
868	decode_ws (dec);	1480	decode_ws (dec);
869		1481
870	if (*dec->cur == '}')	1482	if (*dec->cur == '}')
871	{	1483	{
…		…
875		1487
876	if (*dec->cur != ',')	1488	if (*dec->cur != ',')
877	ERR (", or } expected while parsing object/hash");	1489	ERR (", or } expected while parsing object/hash");
878		1490
879	++dec->cur;	1491	++dec->cur;
		1492
		1493	decode_ws (dec);
		1494
		1495	if (*dec->cur == '}' && dec->json.flags & F_RELAXED)
		1496	{
		1497	++dec->cur;
		1498	break;
		1499	}
880	}	1500	}
881		1501
882	DEC_DEC_DEPTH;	1502	DEC_DEC_DEPTH;
883	return newRV_noinc ((SV *)hv);	1503	sv = newRV_noinc ((SV *)hv);
		1504
		1505	// check filter callbacks
		1506	if (dec->json.flags & F_HOOK)
		1507	{
		1508	if (dec->json.cb_sk_object && HvKEYS (hv) == 1)
		1509	{
		1510	HE *cb, *he;
		1511
		1512	hv_iterinit (hv);
		1513	he = hv_iternext (hv);
		1514	hv_iterinit (hv);
		1515
		1516	// the next line creates a mortal sv each time it's called.
		1517	// might want to optimise this for common cases.
		1518	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);
		1519
		1520	if (cb)
		1521	{
		1522	dSP;
		1523	int count;
		1524
		1525	ENTER; SAVETMPS;
		1526	PUSHMARK (SP);
		1527	XPUSHs (HeVAL (he));
		1528	sv_2mortal (sv);
		1529
		1530	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
		1531
		1532	if (count == 1)
		1533	{
		1534	sv = newSVsv (POPs);
		1535	FREETMPS; LEAVE;
		1536	return sv;
		1537	}
		1538	else if (count)
		1539	croak ("filter_json_single_key_object callbacks must not return more than one scalar");
		1540
		1541	SvREFCNT_inc (sv);
		1542	FREETMPS; LEAVE;
		1543	}
		1544	}
		1545
		1546	if (dec->json.cb_object)
		1547	{
		1548	dSP;
		1549	int count;
		1550
		1551	ENTER; SAVETMPS;
		1552	PUSHMARK (SP);
		1553	XPUSHs (sv_2mortal (sv));
		1554
		1555	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;
		1556
		1557	if (count == 1)
		1558	{
		1559	sv = newSVsv (POPs);
		1560	FREETMPS; LEAVE;
		1561	return sv;
		1562	}
		1563	else if (count)
		1564	croak ("filter_json_object callbacks must not return more than one scalar");
		1565
		1566	SvREFCNT_inc (sv);
		1567	FREETMPS; LEAVE;
		1568	}
		1569	}
		1570
		1571	return sv;
884		1572
885	fail:	1573	fail:
886	SvREFCNT_dec (hv);	1574	SvREFCNT_dec (hv);
887	DEC_DEC_DEPTH;	1575	DEC_DEC_DEPTH;
888	return 0;	1576	return 0;
889	}	1577	}
890		1578
891	static SV *	1579	static SV *
		1580	decode_tag (dec_t *dec)
		1581	{
		1582	SV *tag = 0;
		1583	SV *val = 0;
		1584
		1585	if (!(dec->json.flags & F_ALLOW_TAGS))
		1586	ERR ("malformed JSON string, neither array, object, number, string or atom");
		1587
		1588	++dec->cur;
		1589
		1590	decode_ws (dec);
		1591
		1592	tag = decode_sv (dec);
		1593	if (!tag)
		1594	goto fail;
		1595
		1596	if (!SvPOK (tag))
		1597	ERR ("malformed JSON string, (tag) must be a string");
		1598
		1599	decode_ws (dec);
		1600
		1601	if (*dec->cur != ')')
		1602	ERR (") expected after tag");
		1603
		1604	++dec->cur;
		1605
		1606	decode_ws (dec);
		1607
		1608	val = decode_sv (dec);
		1609	if (!val)
		1610	goto fail;
		1611
		1612	if (!SvROK (val) || SvTYPE (SvRV (val)) != SVt_PVAV)
		1613	ERR ("malformed JSON string, tag value must be an array");
		1614
		1615	{
		1616	AV *av = (AV *)SvRV (val);
		1617	int i, len = av_len (av) + 1;
		1618	HV *stash = gv_stashsv (tag, 0);
		1619	SV *sv;
		1620
		1621	if (!stash)
		1622	ERR ("cannot decode perl-object (package does not exist)");
		1623
		1624	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1625
		1626	if (!method)
		1627	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1628
		1629	dSP;
		1630
		1631	ENTER; SAVETMPS;
		1632	PUSHMARK (SP);
		1633	EXTEND (SP, len + 2);
		1634	// we re-bless the reference to get overload and other niceties right
		1635	PUSHs (tag);
		1636	PUSHs (sv_json);
		1637
		1638	for (i = 0; i < len; ++i)
		1639	PUSHs (*av_fetch (av, i, 1));
		1640
		1641	PUTBACK;
		1642	call_sv ((SV *)GvCV (method), G_SCALAR);
		1643	SPAGAIN;
		1644
		1645	SvREFCNT_dec (tag);
		1646	SvREFCNT_dec (val);
		1647	sv = SvREFCNT_inc (POPs);
		1648
		1649	PUTBACK;
		1650
		1651	FREETMPS; LEAVE;
		1652
		1653	return sv;
		1654	}
		1655
		1656	fail:
		1657	SvREFCNT_dec (tag);
		1658	SvREFCNT_dec (val);
		1659	return 0;
		1660	}
		1661
		1662	static SV *
892	decode_sv (dec_t *dec)	1663	decode_sv (dec_t *dec)
893	{	1664	{
894	decode_ws (dec);	1665	// the beauty of JSON: you need exactly one character lookahead
		1666	// to parse everything.
895	switch (*dec->cur)	1667	switch (*dec->cur)
896	{	1668	{
897	case '"': ++dec->cur; return decode_str (dec);	1669	case '"': ++dec->cur; return decode_str (dec);
898	case '[': ++dec->cur; return decode_av (dec);	1670	case '[': ++dec->cur; return decode_av (dec);
899	case '{': ++dec->cur; return decode_hv (dec);	1671	case '{': ++dec->cur; return decode_hv (dec);
		1672	case '(': return decode_tag (dec);
900		1673
901	case '-':	1674	case '-':
902	case '0': case '1': case '2': case '3': case '4':	1675	case '0': case '1': case '2': case '3': case '4':
903	case '5': case '6': case '7': case '8': case '9':	1676	case '5': case '6': case '7': case '8': case '9':
904	return decode_num (dec);	1677	return decode_num (dec);
905		1678
		1679	case 'f':
		1680	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
		1681	{
		1682	dec->cur += 5;
		1683
		1684	if (expect_false (!dec->json.v_false))
		1685	dec->json.v_false = GET_BOOL (false);
		1686
		1687	return newSVsv (dec->json.v_false);
		1688	}
		1689	else
		1690	ERR ("'false' expected");
		1691
		1692	break;
		1693
906	case 't':	1694	case 't':
907	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1695	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
908	{	1696	{
909	dec->cur += 4;	1697	dec->cur += 4;
		1698
		1699	if (expect_false (!dec->json.v_true))
		1700	dec->json.v_true = GET_BOOL (true);
		1701
910	return newSViv (1);	1702	return newSVsv (dec->json.v_true);
911	}	1703	}
912	else	1704	else
913	ERR ("'true' expected");	1705	ERR ("'true' expected");
914
915	break;
916
917	case 'f':
918	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
919	{
920	dec->cur += 5;
921	return newSViv (0);
922	}
923	else
924	ERR ("'false' expected");
925		1706
926	break;	1707	break;
927		1708
928	case 'n':	1709	case 'n':
929	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))	1710	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
…		…
935	ERR ("'null' expected");	1716	ERR ("'null' expected");
936		1717
937	break;	1718	break;
938		1719
939	default:	1720	default:
940	ERR ("malformed json string, neither array, object, number, string or atom");	1721	ERR ("malformed JSON string, neither tag, array, object, number, string or atom");
941	break;	1722	break;
942	}	1723	}
943		1724
944	fail:	1725	fail:
945	return 0;	1726	return 0;
946	}	1727	}
947		1728
948	static SV *	1729	static SV *
949	decode_json (SV *string, U32 flags)	1730	decode_json (SV *string, JSON *json, STRLEN *offset_return)
950	{	1731	{
		1732	dec_t dec;
951	SV *sv;	1733	SV *sv;
952		1734
953	if (flags & F_UTF8)	1735	/* work around bugs in 5.10 where manipulating magic values
		1736	* makes perl ignore the magic in subsequent accesses.
		1737	* also make a copy of non-PV values, to get them into a clean
		1738	* state (SvPV should do that, but it's buggy, see below).
		1739	*
		1740	* SvIsCOW_shared_hash works around a bug in perl (possibly 5.16),
		1741	* as reported by Reini Urban.
		1742	*/
		1743	/*SvGETMAGIC (string);*/
		1744	if (SvMAGICAL (string) || !SvPOK (string) || SvIsCOW_shared_hash (string))
		1745	string = sv_2mortal (newSVsv (string));
		1746
		1747	SvUPGRADE (string, SVt_PV);
		1748
		1749	/* work around a bug in perl 5.10, which causes SvCUR to fail an
		1750	* assertion with -DDEBUGGING, although SvCUR is documented to
		1751	* return the xpv_cur field which certainly exists after upgrading.
		1752	* according to nicholas clark, calling SvPOK fixes this.
		1753	* But it doesn't fix it, so try another workaround, call SvPV_nolen
		1754	* and hope for the best.
		1755	* Damnit, SvPV_nolen still trips over yet another assertion. This
		1756	* assertion business is seriously broken, try yet another workaround
		1757	* for the broken -DDEBUGGING.
		1758	*/
		1759	{
		1760	#ifdef DEBUGGING
		1761	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
		1762	#else
		1763	STRLEN offset = SvCUR (string);
		1764	#endif
		1765
		1766	if (offset > json->max_size && json->max_size)
		1767	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		1768	(unsigned long)SvCUR (string), (unsigned long)json->max_size);
		1769	}
		1770
		1771	if (DECODE_WANTS_OCTETS (json))
954	sv_utf8_downgrade (string, 0);	1772	sv_utf8_downgrade (string, 0);
955	else	1773	else
956	sv_utf8_upgrade (string);	1774	sv_utf8_upgrade (string);
957		1775
958	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1776	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
959		1777
960	dec_t dec;	1778	dec.json = *json;
961	dec.flags = flags;
962	dec.cur = SvPVX (string);	1779	dec.cur = SvPVX (string);
963	dec.end = SvEND (string);	1780	dec.end = SvEND (string);
964	dec.err = 0;	1781	dec.err = 0;
965	dec.depth = 0;	1782	dec.depth = 0;
966	dec.maxdepth = DEC_DEPTH (dec.flags);
967		1783
		1784	if (dec.json.cb_object || dec.json.cb_sk_object)
		1785	dec.json.flags |= F_HOOK;
		1786
968	*dec.end = 0; // this should basically be a nop, too, but make sure its there	1787	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
		1788
		1789	decode_ws (&dec);
969	sv = decode_sv (&dec);	1790	sv = decode_sv (&dec);
970		1791
		1792	if (offset_return)
		1793	*offset_return = dec.cur - SvPVX (string);
		1794	else if (sv)
		1795	{
		1796	// check for trailing garbage
		1797	decode_ws (&dec);
		1798
		1799	if (*dec.cur)
		1800	{
		1801	dec.err = "garbage after JSON object";
		1802	SvREFCNT_dec (sv);
		1803	sv = 0;
		1804	}
		1805	}
		1806
971	if (!sv)	1807	if (!sv)
972	{	1808	{
973	IV offset = dec.flags & F_UTF8
974	? dec.cur - SvPVX (string)
975	: utf8_distance (dec.cur, SvPVX (string));
976	SV *uni = sv_newmortal ();	1809	SV *uni = sv_newmortal ();
977		1810
978	// horrible hack to silence warning inside pv_uni_display	1811	// horrible hack to silence warning inside pv_uni_display
979	COP cop = *PL_curcop;	1812	COP cop = *PL_curcop;
980	cop.cop_warnings = pWARN_NONE;	1813	cop.cop_warnings = pWARN_NONE;
…		…
982	SAVEVPTR (PL_curcop);	1815	SAVEVPTR (PL_curcop);
983	PL_curcop = &cop;	1816	PL_curcop = &cop;
984	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);	1817	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);
985	LEAVE;	1818	LEAVE;
986		1819
987	croak ("%s, at character offset %d (%s)",	1820	croak ("%s, at character offset %d (before \"%s\")",
988	dec.err,	1821	dec.err,
989	(int)offset,	1822	(int)ptr_to_index (string, dec.cur),
990	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1823	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
991	}	1824	}
992		1825
993	sv = sv_2mortal (sv);	1826	sv = sv_2mortal (sv);
994		1827
995	if (!(dec.flags & F_ALLOW_NONREF) && !SvROK (sv))	1828	if (!(dec.json.flags & F_ALLOW_NONREF) && json_nonref (sv))
996	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");	1829	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
997		1830
998	return sv;	1831	return sv;
		1832	}
		1833
		1834	/////////////////////////////////////////////////////////////////////////////
		1835	// incremental parser
		1836
		1837	static void
		1838	incr_parse (JSON *self)
		1839	{
		1840	const char *p = SvPVX (self->incr_text) + self->incr_pos;
		1841
		1842	// the state machine here is a bit convoluted and could be simplified a lot
		1843	// but this would make it slower, so...
		1844
		1845	for (;;)
		1846	{
		1847	//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
		1848	switch (self->incr_mode)
		1849	{
		1850	// only used for initial whitespace skipping
		1851	case INCR_M_WS:
		1852	for (;;)
		1853	{
		1854	if (*p > 0x20)
		1855	{
		1856	if (*p == '#')
		1857	{
		1858	self->incr_mode = INCR_M_C0;
		1859	goto incr_m_c;
		1860	}
		1861	else
		1862	{
		1863	self->incr_mode = INCR_M_JSON;
		1864	goto incr_m_json;
		1865	}
		1866	}
		1867	else if (!*p)
		1868	goto interrupt;
		1869
		1870	++p;
		1871	}
		1872
		1873	// skip a single char inside a string (for \\-processing)
		1874	case INCR_M_BS:
		1875	if (!*p)
		1876	goto interrupt;
		1877
		1878	++p;
		1879	self->incr_mode = INCR_M_STR;
		1880	goto incr_m_str;
		1881
		1882	// inside #-style comments
		1883	case INCR_M_C0:
		1884	case INCR_M_C1:
		1885	incr_m_c:
		1886	for (;;)
		1887	{
		1888	if (*p == '\n')
		1889	{
		1890	self->incr_mode = self->incr_mode == INCR_M_C0 ? INCR_M_WS : INCR_M_JSON;
		1891	break;
		1892	}
		1893	else if (!*p)
		1894	goto interrupt;
		1895
		1896	++p;
		1897	}
		1898
		1899	break;
		1900
		1901	// inside a string
		1902	case INCR_M_STR:
		1903	incr_m_str:
		1904	for (;;)
		1905	{
		1906	if (*p == '"')
		1907	{
		1908	++p;
		1909	self->incr_mode = INCR_M_JSON;
		1910
		1911	if (!self->incr_nest)
		1912	goto interrupt;
		1913
		1914	goto incr_m_json;
		1915	}
		1916	else if (*p == '\\')
		1917	{
		1918	++p; // "virtually" consumes character after \
		1919
		1920	if (!*p) // if at end of string we have to switch modes
		1921	{
		1922	self->incr_mode = INCR_M_BS;
		1923	goto interrupt;
		1924	}
		1925	}
		1926	else if (!*p)
		1927	goto interrupt;
		1928
		1929	++p;
		1930	}
		1931
		1932	// after initial ws, outside string
		1933	case INCR_M_JSON:
		1934	incr_m_json:
		1935	for (;;)
		1936	{
		1937	switch (*p++)
		1938	{
		1939	case 0:
		1940	--p;
		1941	goto interrupt;
		1942
		1943	case 0x09:
		1944	case 0x0a:
		1945	case 0x0d:
		1946	case 0x20:
		1947	if (!self->incr_nest)
		1948	{
		1949	--p; // do not eat the whitespace, let the next round do it
		1950	goto interrupt;
		1951	}
		1952	break;
		1953
		1954	case '"':
		1955	self->incr_mode = INCR_M_STR;
		1956	goto incr_m_str;
		1957
		1958	case '[':
		1959	case '{':
		1960	case '(':
		1961	if (++self->incr_nest > self->max_depth)
		1962	croak (ERR_NESTING_EXCEEDED);
		1963	break;
		1964
		1965	case ']':
		1966	case '}':
		1967	if (--self->incr_nest <= 0)
		1968	goto interrupt;
		1969	break;
		1970
		1971	case ')':
		1972	--self->incr_nest;
		1973	break;
		1974
		1975	case '#':
		1976	self->incr_mode = INCR_M_C1;
		1977	goto incr_m_c;
		1978	}
		1979	}
		1980	}
		1981
		1982	modechange:
		1983	;
		1984	}
		1985
		1986	interrupt:
		1987	self->incr_pos = p - SvPVX (self->incr_text);
		1988	//printf ("interrupt<%.*s>\n", self->incr_pos, SvPVX(self->incr_text));//D
		1989	//printf ("return pos %d mode %d nest %d\n", self->incr_pos, self->incr_mode, self->incr_nest);//D
999	}	1990	}
1000		1991
1001	/////////////////////////////////////////////////////////////////////////////	1992	/////////////////////////////////////////////////////////////////////////////
1002	// XS interface functions	1993	// XS interface functions
1003		1994
1004	MODULE = JSON::XS PACKAGE = JSON::XS	1995	MODULE = JSON::XS PACKAGE = JSON::XS
1005		1996
1006	BOOT:	1997	BOOT:
1007	{	1998	{
1008	int i;	1999	int i;
1009
1010	memset (decode_hexdigit, 0xff, 256);
1011		2000
1012	for (i = 0; i < 256; ++i)	2001	for (i = 0; i < 256; ++i)
1013	decode_hexdigit [i] =	2002	decode_hexdigit [i] =
1014	i >= '0' && i <= '9' ? i - '0'	2003	i >= '0' && i <= '9' ? i - '0'
1015	: i >= 'a' && i <= 'f' ? i - 'a' + 10	2004	: i >= 'a' && i <= 'f' ? i - 'a' + 10
1016	: i >= 'A' && i <= 'F' ? i - 'A' + 10	2005	: i >= 'A' && i <= 'F' ? i - 'A' + 10
1017	: -1;	2006	: -1;
1018		2007
1019	json_stash = gv_stashpv ("JSON::XS", 1);	2008	json_stash = gv_stashpv ("JSON::XS" , 1);
		2009	bool_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
		2010	bool_false = get_bool ("Types::Serialiser::false");
		2011	bool_true = get_bool ("Types::Serialiser::true");
		2012
		2013	sv_json = newSVpv ("JSON", 0);
		2014	SvREADONLY_on (sv_json);
		2015
		2016	CvNODEBUG_on (get_cv ("JSON::XS::incr_text", 0)); /* the debugger completely breaks lvalue subs */
1020	}	2017	}
1021		2018
1022	PROTOTYPES: DISABLE	2019	PROTOTYPES: DISABLE
1023		2020
1024	SV *new (char *dummy)	2021	void CLONE (...)
1025	CODE:	2022	CODE:
1026	RETVAL = sv_bless (newRV_noinc (newSVuv (F_DEFAULT)), json_stash);	2023	// as long as these writes are atomic, the race should not matter
		2024	// as existing threads either already use 0, or use the old value,
		2025	// which is sitll correct for the initial thread.
		2026	json_stash = 0;
		2027	bool_stash = 0;
		2028	bool_false = 0;
		2029	bool_true = 0;
		2030
		2031	void new (char *klass)
		2032	PPCODE:
		2033	{
		2034	SV *pv = NEWSV (0, sizeof (JSON));
		2035	SvPOK_only (pv);
		2036	json_init ((JSON *)SvPVX (pv));
		2037	XPUSHs (sv_2mortal (sv_bless (
		2038	newRV_noinc (pv),
		2039	strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)
		2040	)));
		2041	}
		2042
		2043	void boolean_values (JSON *self, SV *v_false = 0, SV *v_true = 0)
		2044	PPCODE:
		2045	self->v_false = newSVsv (v_false);
		2046	self->v_true = newSVsv (v_true);
		2047	XPUSHs (ST (0));
		2048
		2049	void get_boolean_values (JSON *self)
		2050	PPCODE:
		2051	if (self->v_false && self->v_true)
		2052	{
		2053	EXTEND (SP, 2);
		2054	PUSHs (self->v_false);
		2055	PUSHs (self->v_true);
		2056	}
		2057
		2058	void ascii (JSON *self, int enable = 1)
		2059	ALIAS:
		2060	ascii = F_ASCII
		2061	latin1 = F_LATIN1
		2062	utf8 = F_UTF8
		2063	indent = F_INDENT
		2064	canonical = F_CANONICAL
		2065	space_before = F_SPACE_BEFORE
		2066	space_after = F_SPACE_AFTER
		2067	pretty = F_PRETTY
		2068	allow_nonref = F_ALLOW_NONREF
		2069	shrink = F_SHRINK
		2070	allow_blessed = F_ALLOW_BLESSED
		2071	convert_blessed = F_CONV_BLESSED
		2072	relaxed = F_RELAXED
		2073	allow_unknown = F_ALLOW_UNKNOWN
		2074	allow_tags = F_ALLOW_TAGS
		2075	PPCODE:
		2076	{
		2077	if (enable)
		2078	self->flags |= ix;
		2079	else
		2080	self->flags &= ~ix;
		2081
		2082	XPUSHs (ST (0));
		2083	}
		2084
		2085	void get_ascii (JSON *self)
		2086	ALIAS:
		2087	get_ascii = F_ASCII
		2088	get_latin1 = F_LATIN1
		2089	get_utf8 = F_UTF8
		2090	get_indent = F_INDENT
		2091	get_canonical = F_CANONICAL
		2092	get_space_before = F_SPACE_BEFORE
		2093	get_space_after = F_SPACE_AFTER
		2094	get_allow_nonref = F_ALLOW_NONREF
		2095	get_shrink = F_SHRINK
		2096	get_allow_blessed = F_ALLOW_BLESSED
		2097	get_convert_blessed = F_CONV_BLESSED
		2098	get_relaxed = F_RELAXED
		2099	get_allow_unknown = F_ALLOW_UNKNOWN
		2100	get_allow_tags = F_ALLOW_TAGS
		2101	PPCODE:
		2102	XPUSHs (boolSV (self->flags & ix));
		2103
		2104	void max_depth (JSON *self, U32 max_depth = 0x80000000UL)
		2105	PPCODE:
		2106	self->max_depth = max_depth;
		2107	XPUSHs (ST (0));
		2108
		2109	U32 get_max_depth (JSON *self)
		2110	CODE:
		2111	RETVAL = self->max_depth;
1027	OUTPUT:	2112	OUTPUT:
1028	RETVAL	2113	RETVAL
1029		2114
1030	SV *ascii (SV *self, int enable = 1)	2115	void max_size (JSON *self, U32 max_size = 0)
1031	ALIAS:	2116	PPCODE:
1032	ascii = F_ASCII	2117	self->max_size = max_size;
1033	utf8 = F_UTF8	2118	XPUSHs (ST (0));
1034	indent = F_INDENT	2119
1035	canonical = F_CANONICAL	2120	int get_max_size (JSON *self)
1036	space_before = F_SPACE_BEFORE
1037	space_after = F_SPACE_AFTER
1038	pretty = F_PRETTY
1039	allow_nonref = F_ALLOW_NONREF
1040	shrink = F_SHRINK
1041	CODE:	2121	CODE:
1042	{	2122	RETVAL = self->max_size;
1043	UV *uv = SvJSON (self);
1044	if (enable)
1045	*uv |= ix;
1046	else
1047	*uv &= ~ix;
1048
1049	RETVAL = newSVsv (self);
1050	}
1051	OUTPUT:	2123	OUTPUT:
1052	RETVAL	2124	RETVAL
1053		2125
1054	SV *max_depth (SV *self, int max_depth = 0x80000000UL)	2126	void filter_json_object (JSON *self, SV *cb = &PL_sv_undef)
		2127	PPCODE:
		2128	{
		2129	SvREFCNT_dec (self->cb_object);
		2130	self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;
		2131
		2132	XPUSHs (ST (0));
		2133	}
		2134
		2135	void filter_json_single_key_object (JSON *self, SV *key, SV *cb = &PL_sv_undef)
		2136	PPCODE:
		2137	{
		2138	if (!self->cb_sk_object)
		2139	self->cb_sk_object = newHV ();
		2140
		2141	if (SvOK (cb))
		2142	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
		2143	else
		2144	{
		2145	hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
		2146
		2147	if (!HvKEYS (self->cb_sk_object))
		2148	{
		2149	SvREFCNT_dec (self->cb_sk_object);
		2150	self->cb_sk_object = 0;
		2151	}
		2152	}
		2153
		2154	XPUSHs (ST (0));
		2155	}
		2156
		2157	void encode (JSON *self, SV *scalar)
		2158	PPCODE:
		2159	PUTBACK; scalar = encode_json (scalar, self); SPAGAIN;
		2160	XPUSHs (scalar);
		2161
		2162	void decode (JSON *self, SV *jsonstr)
		2163	PPCODE:
		2164	PUTBACK; jsonstr = decode_json (jsonstr, self, 0); SPAGAIN;
		2165	XPUSHs (jsonstr);
		2166
		2167	void decode_prefix (JSON *self, SV *jsonstr)
		2168	PPCODE:
		2169	{
		2170	SV *sv;
		2171	STRLEN offset;
		2172	PUTBACK; sv = decode_json (jsonstr, self, &offset); SPAGAIN;
		2173	EXTEND (SP, 2);
		2174	PUSHs (sv);
		2175	PUSHs (sv_2mortal (newSVuv (ptr_to_index (jsonstr, SvPV_nolen (jsonstr) + offset))));
		2176	}
		2177
		2178	void incr_parse (JSON *self, SV *jsonstr = 0)
		2179	PPCODE:
		2180	{
		2181	if (!self->incr_text)
		2182	self->incr_text = newSVpvn ("", 0);
		2183
		2184	/* if utf8-ness doesn't match the decoder, need to upgrade/downgrade */
		2185	if (!DECODE_WANTS_OCTETS (self) == !SvUTF8 (self->incr_text))
		2186	if (DECODE_WANTS_OCTETS (self))
		2187	{
		2188	if (self->incr_pos)
		2189	self->incr_pos = utf8_length ((U8 *)SvPVX (self->incr_text),
		2190	(U8 *)SvPVX (self->incr_text) + self->incr_pos);
		2191
		2192	sv_utf8_downgrade (self->incr_text, 0);
		2193	}
		2194	else
		2195	{
		2196	sv_utf8_upgrade (self->incr_text);
		2197
		2198	if (self->incr_pos)
		2199	self->incr_pos = utf8_hop ((U8 *)SvPVX (self->incr_text), self->incr_pos)
		2200	- (U8 *)SvPVX (self->incr_text);
		2201	}
		2202
		2203	// append data, if any
		2204	if (jsonstr)
		2205	{
		2206	/* make sure both strings have same encoding */
		2207	if (SvUTF8 (jsonstr) != SvUTF8 (self->incr_text))
		2208	if (SvUTF8 (jsonstr))
		2209	sv_utf8_downgrade (jsonstr, 0);
		2210	else
		2211	sv_utf8_upgrade (jsonstr);
		2212
		2213	/* and then just blindly append */
		2214	{
		2215	STRLEN len;
		2216	const char *str = SvPV (jsonstr, len);
		2217	STRLEN cur = SvCUR (self->incr_text);
		2218
		2219	if (SvLEN (self->incr_text) - cur <= len)
		2220	json_sv_grow (self->incr_text, cur, len);
		2221
		2222	Move (str, SvEND (self->incr_text), len, char);
		2223	SvCUR_set (self->incr_text, SvCUR (self->incr_text) + len);
		2224	*SvEND (self->incr_text) = 0; // this should basically be a nop, too, but make sure it's there
		2225	}
		2226	}
		2227
		2228	if (GIMME_V != G_VOID)
		2229	do
		2230	{
		2231	SV *sv;
		2232	STRLEN offset;
		2233
		2234	if (!INCR_DONE (self))
		2235	{
		2236	incr_parse (self);
		2237
		2238	if (self->incr_pos > self->max_size && self->max_size)
		2239	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		2240	(unsigned long)self->incr_pos, (unsigned long)self->max_size);
		2241
		2242	if (!INCR_DONE (self))
		2243	{
		2244	// as an optimisation, do not accumulate white space in the incr buffer
		2245	if (self->incr_mode == INCR_M_WS && self->incr_pos)
		2246	{
		2247	self->incr_pos = 0;
		2248	SvCUR_set (self->incr_text, 0);
		2249	}
		2250
		2251	break;
		2252	}
		2253	}
		2254
		2255	PUTBACK; sv = decode_json (self->incr_text, self, &offset); SPAGAIN;
		2256	XPUSHs (sv);
		2257
		2258	self->incr_pos -= offset;
		2259	self->incr_nest = 0;
		2260	self->incr_mode = 0;
		2261
		2262	sv_chop (self->incr_text, SvPVX (self->incr_text) + offset);
		2263	}
		2264	while (GIMME_V == G_ARRAY);
		2265	}
		2266
		2267	SV *incr_text (JSON *self)
		2268	ATTRS: lvalue
1055	CODE:	2269	CODE:
1056	{	2270	{
1057	UV *uv = SvJSON (self);	2271	if (self->incr_pos)
1058	UV log2 = 0;	2272	croak ("incr_text can not be called when the incremental parser already started parsing");
1059		2273
1060	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;	2274	RETVAL = self->incr_text ? SvREFCNT_inc (self->incr_text) : &PL_sv_undef;
1061
1062	while ((1UL << log2) < max_depth)
1063	++log2;
1064
1065	*uv = *uv & ~F_MAXDEPTH | (log2 << S_MAXDEPTH);
1066
1067	RETVAL = newSVsv (self);
1068	}	2275	}
1069	OUTPUT:	2276	OUTPUT:
1070	RETVAL	2277	RETVAL
1071		2278
		2279	void incr_skip (JSON *self)
		2280	CODE:
		2281	{
		2282	if (self->incr_pos)
		2283	{
		2284	sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + self->incr_pos);
		2285	self->incr_pos = 0;
		2286	self->incr_nest = 0;
		2287	self->incr_mode = 0;
		2288	}
		2289	}
		2290
		2291	void incr_reset (JSON *self)
		2292	CODE:
		2293	{
		2294	SvREFCNT_dec (self->incr_text);
		2295	self->incr_text = 0;
		2296	self->incr_pos = 0;
		2297	self->incr_nest = 0;
		2298	self->incr_mode = 0;
		2299	}
		2300
		2301	void DESTROY (JSON *self)
		2302	CODE:
		2303	SvREFCNT_dec (self->v_false);
		2304	SvREFCNT_dec (self->v_true);
		2305	SvREFCNT_dec (self->cb_sk_object);
		2306	SvREFCNT_dec (self->cb_object);
		2307	SvREFCNT_dec (self->incr_text);
		2308
		2309	PROTOTYPES: ENABLE
		2310
1072	void encode (SV *self, SV *scalar)	2311	void encode_json (SV *scalar)
1073	PPCODE:	2312	PPCODE:
1074	XPUSHs (encode_json (scalar, *SvJSON (self)));	2313	{
		2314	JSON json;
		2315	json_init (&json);
		2316	json.flags |= F_UTF8;
		2317	PUTBACK; scalar = encode_json (scalar, &json); SPAGAIN;
		2318	XPUSHs (scalar);
		2319	}
1075		2320
1076	void decode (SV *self, SV *jsonstr)	2321	void decode_json (SV *jsonstr)
1077	PPCODE:	2322	PPCODE:
1078	XPUSHs (decode_json (jsonstr, *SvJSON (self)));	2323	{
		2324	JSON json;
		2325	json_init (&json);
		2326	json.flags |= F_UTF8;
		2327	PUTBACK; jsonstr = decode_json (jsonstr, &json, 0); SPAGAIN;
		2328	XPUSHs (jsonstr);
		2329	}
1079		2330
1080	PROTOTYPES: ENABLE
1081
1082	void to_json (SV *scalar)
1083	ALIAS:
1084	objToJson = 0
1085	PPCODE:
1086	XPUSHs (encode_json (scalar, F_DEFAULT | F_UTF8));
1087
1088	void from_json (SV *jsonstr)
1089	ALIAS:
1090	jsonToObj = 0
1091	PPCODE:
1092	XPUSHs (decode_json (jsonstr, F_DEFAULT | F_UTF8));
1093

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