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Comparing JSON-XS/XS.xs (file contents):
Revision 1.52 by root, Mon Jul 2 02:57:11 2007 UTC vs.
Revision 1.137 by root, Sun Feb 24 04:21:05 2019 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"	8	#include <stdio.h>
		9	#include <limits.h>
		10	#include <float.h>
		11	#include <inttypes.h>
9		12
10	#if defined(__BORLANDC__) || defined(_MSC_VER)	13	#if defined(__BORLANDC__) || defined(_MSC_VER)
11	# define snprintf _snprintf // C compilers have this in stdio.h	14	# define snprintf _snprintf // C compilers have this in stdio.h
12	#endif	15	#endif
13		16
14	// some old perls do not have this, try to make it work, no	17	// some old perls do not have this, try to make it work, no
15	// guarentees, though. if it breaks, you get to keep the pieces.	18	// guarantees, though. if it breaks, you get to keep the pieces.
16	#ifndef UTF8_MAXBYTES	19	#ifndef UTF8_MAXBYTES
17	# define UTF8_MAXBYTES 13	20	# define UTF8_MAXBYTES 13
18	#endif	21	#endif
		22
		23	// compatibility with perl <5.18
		24	#ifndef HvNAMELEN_get
		25	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		26	#endif
		27	#ifndef HvNAMELEN
		28	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		29	#endif
		30	#ifndef HvNAMEUTF8
		31	# define HvNAMEUTF8(hv) 0
		32	#endif
		33
		34	// three extra for rounding, sign, and end of string
		35	#define IVUV_MAXCHARS (sizeof (UV) * CHAR_BIT * 28 / 93 + 3)
19		36
20	#define F_ASCII 0x00000001UL	37	#define F_ASCII 0x00000001UL
21	#define F_LATIN1 0x00000002UL	38	#define F_LATIN1 0x00000002UL
22	#define F_UTF8 0x00000004UL	39	#define F_UTF8 0x00000004UL
23	#define F_INDENT 0x00000008UL	40	#define F_INDENT 0x00000008UL
…		…
26	#define F_SPACE_AFTER 0x00000040UL	43	#define F_SPACE_AFTER 0x00000040UL
27	#define F_ALLOW_NONREF 0x00000100UL	44	#define F_ALLOW_NONREF 0x00000100UL
28	#define F_SHRINK 0x00000200UL	45	#define F_SHRINK 0x00000200UL
29	#define F_ALLOW_BLESSED 0x00000400UL	46	#define F_ALLOW_BLESSED 0x00000400UL
30	#define F_CONV_BLESSED 0x00000800UL	47	#define F_CONV_BLESSED 0x00000800UL
31	#define F_MAXDEPTH 0xf8000000UL
32	#define S_MAXDEPTH 27
33	#define F_MAXSIZE 0x01f00000UL	48	#define F_RELAXED 0x00001000UL
34	#define S_MAXSIZE 20	49	#define F_ALLOW_UNKNOWN 0x00002000UL
		50	#define F_ALLOW_TAGS 0x00004000UL
35	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing	51	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
36		52
37	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
38	#define DEC_SIZE(flags) (1UL << ((flags & F_MAXSIZE ) >> S_MAXSIZE ))
39
40	#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER	53	#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER
41	#define F_DEFAULT (9UL << S_MAXDEPTH)
42		54
43	#define INIT_SIZE 32 // initial scalar size to be allocated	55	#define INIT_SIZE 64 // initial scalar size to be allocated
44	#define INDENT_STEP 3 // spaces per indentation level	56	#define INDENT_STEP 3 // spaces per indentation level
45		57
46	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size	58	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size
		59
		60	#define DECODE_WANTS_OCTETS(json) ((json)->flags & F_UTF8)
47		61
48	#define SB do {	62	#define SB do {
49	#define SE } while (0)	63	#define SE } while (0)
50		64
51	#if __GNUC__ >= 3	65	#if __GNUC__ >= 3
52	# define expect(expr,value) __builtin_expect ((expr),(value))	66	# define expect(expr,value) __builtin_expect ((expr), (value))
53	# define inline inline	67	# define INLINE static inline
54	#else	68	#else
55	# define expect(expr,value) (expr)	69	# define expect(expr,value) (expr)
56	# define inline static	70	# define INLINE static
57	#endif	71	#endif
58		72
59	#define expect_false(expr) expect ((expr) != 0, 0)	73	#define expect_false(expr) expect ((expr) != 0, 0)
60	#define expect_true(expr) expect ((expr) != 0, 1)	74	#define expect_true(expr) expect ((expr) != 0, 1)
61		75
62	static HV *json_stash, *json_boolean_stash; // JSON::XS::	76	#define IN_RANGE_INC(type,val,beg,end) \
63	static SV *json_true, *json_false;	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_TFN, // inside true/false/null
		102	INCR_M_NUM, // inside number
		103	INCR_M_STR, // inside string
		104	INCR_M_BS, // inside backslash
		105	INCR_M_C0, // inside comment in initial whitespace sequence
		106	INCR_M_C1, // inside comment in other places
		107	INCR_M_JSON // outside anything, count nesting
		108	};
		109
		110	#define INCR_DONE(json) ((json)->incr_nest <= 0 && (json)->incr_mode == INCR_M_JSON)
64		111
65	typedef struct {	112	typedef struct {
66	U32 flags;	113	U32 flags;
		114	U32 max_depth;
		115	STRLEN max_size;
		116
67	SV *cb_object;	117	SV *cb_object;
68	HV *cb_sk_object;	118	HV *cb_sk_object;
		119
		120	// for the incremental parser
		121	SV *incr_text; // the source text so far
		122	STRLEN incr_pos; // the current offset into the text
		123	int incr_nest; // {[]}-nesting level
		124	unsigned char incr_mode;
		125
		126	SV *v_false, *v_true;
69	} JSON;	127	} JSON;
		128
		129	INLINE void
		130	json_init (JSON *json)
		131	{
		132	static const JSON init = { F_ALLOW_NONREF, 512 };
		133
		134	*json = init;
		135	}
70		136
71	/////////////////////////////////////////////////////////////////////////////	137	/////////////////////////////////////////////////////////////////////////////
72	// utility functions	138	// utility functions
73		139
74	inline void	140	INLINE SV *
		141	get_bool (const char *name)
		142	{
		143	SV *sv = get_sv (name, 1);
		144
		145	SvREADONLY_on (sv);
		146	SvREADONLY_on (SvRV (sv));
		147
		148	return sv;
		149	}
		150
		151	INLINE void
75	shrink (SV *sv)	152	shrink (SV *sv)
76	{	153	{
77	sv_utf8_downgrade (sv, 1);	154	sv_utf8_downgrade (sv, 1);
		155
78	if (SvLEN (sv) > SvCUR (sv) + 1)	156	if (SvLEN (sv) > SvCUR (sv) + 1)
79	{	157	{
80	#ifdef SvPV_shrink_to_cur	158	#ifdef SvPV_shrink_to_cur
81	SvPV_shrink_to_cur (sv);	159	SvPV_shrink_to_cur (sv);
82	#elif defined (SvPV_renew)	160	#elif defined (SvPV_renew)
83	SvPV_renew (sv, SvCUR (sv) + 1);	161	SvPV_renew (sv, SvCUR (sv) + 1);
84	#endif	162	#endif
85	}	163	}
86	}	164	}
87		165
		166	/* adds two STRLENs together, slow, and with paranoia */
		167	STRLEN
		168	strlen_sum (STRLEN l1, STRLEN l2)
		169	{
		170	size_t sum = l1 + l2;
		171
		172	if (sum < (size_t)l2 || sum != (size_t)(STRLEN)sum)
		173	croak ("JSON::XS: string size overflow");
		174
		175	return sum;
		176	}
		177
		178	/* similar to SvGROW, but somewhat safer and guarantees exponential realloc strategy */
		179	static char *
		180	json_sv_grow (SV *sv, size_t len1, size_t len2)
		181	{
		182	len1 = strlen_sum (len1, len2);
		183	len1 = strlen_sum (len1, len1 >> 1);
		184
		185	if (len1 > 4096 - 24)
		186	len1 = (len1 | 4095) - 24;
		187
		188	return SvGROW (sv, len1);
		189	}
		190
88	// decode an utf-8 character and return it, or (UV)-1 in	191	// decode a utf-8 character and return it, or (UV)-1 in
89	// case of an error.	192	// case of an error.
90	// we special-case "safe" characters from U+80 .. U+7FF,	193	// we special-case "safe" characters from U+80 .. U+7FF,
91	// but use the very good perl function to parse anything else.	194	// but use the very good perl function to parse anything else.
92	// note that we never call this function for a ascii codepoints	195	// note that we never call this function for a ascii codepoints
93	inline UV	196	INLINE UV
94	decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)	197	decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)
95	{	198	{
96	if (expect_false (s[0] > 0xdf || s[0] < 0xc2))	199	if (expect_true (len >= 2
97	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);	200	&& IN_RANGE_INC (char, s[0], 0xc2, 0xdf)
98	else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf)	201	&& IN_RANGE_INC (char, s[1], 0x80, 0xbf)))
99	{	202	{
100	*clen = 2;	203	*clen = 2;
101	return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);	204	return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);
102	}	205	}
103	else	206	else
		207	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);
		208	}
		209
		210	// likewise for encoding, also never called for ascii codepoints
		211	// this function takes advantage of this fact, although current gccs
		212	// seem to optimise the check for >= 0x80 away anyways
		213	INLINE unsigned char *
		214	encode_utf8 (unsigned char *s, UV ch)
		215	{
		216	if (expect_false (ch < 0x000080))
		217	*s++ = ch;
		218	else if (expect_true (ch < 0x000800))
		219	*s++ = 0xc0 | ( ch >> 6),
		220	*s++ = 0x80 | ( ch & 0x3f);
		221	else if ( ch < 0x010000)
		222	*s++ = 0xe0 | ( ch >> 12),
		223	*s++ = 0x80 | ((ch >> 6) & 0x3f),
		224	*s++ = 0x80 | ( ch & 0x3f);
		225	else if ( ch < 0x110000)
		226	*s++ = 0xf0 | ( ch >> 18),
		227	*s++ = 0x80 | ((ch >> 12) & 0x3f),
		228	*s++ = 0x80 | ((ch >> 6) & 0x3f),
		229	*s++ = 0x80 | ( ch & 0x3f);
		230
		231	return s;
		232	}
		233
		234	// convert offset pointer to character index, sv must be string
		235	static STRLEN
		236	ptr_to_index (SV *sv, char *offset)
		237	{
		238	return SvUTF8 (sv)
		239	? utf8_distance (offset, SvPVX (sv))
		240	: offset - SvPVX (sv);
		241	}
		242
		243	/////////////////////////////////////////////////////////////////////////////
		244	// fp hell
		245
		246	// scan a group of digits, and a trailing exponent
		247	static void
		248	json_atof_scan1 (const char *s, NV *accum, int *expo, int postdp, int maxdepth)
		249	{
		250	UV uaccum = 0;
		251	int eaccum = 0;
		252
		253	// if we recurse too deep, skip all remaining digits
		254	// to avoid a stack overflow attack
		255	if (expect_false (--maxdepth <= 0))
		256	while (((U8)*s - '0') < 10)
		257	++s;
		258
		259	for (;;)
		260	{
		261	U8 dig = (U8)*s - '0';
		262
		263	if (expect_false (dig >= 10))
		264	{
		265	if (dig == (U8)((U8)'.' - (U8)'0'))
		266	{
		267	++s;
		268	json_atof_scan1 (s, accum, expo, 1, maxdepth);
		269	}
		270	else if ((dig | ' ') == 'e' - '0')
		271	{
		272	int exp2 = 0;
		273	int neg = 0;
		274
		275	++s;
		276
		277	if (*s == '-')
		278	{
		279	++s;
		280	neg = 1;
		281	}
		282	else if (*s == '+')
		283	++s;
		284
		285	while ((dig = (U8)*s - '0') < 10)
		286	exp2 = exp2 * 10 + *s++ - '0';
		287
		288	*expo += neg ? -exp2 : exp2;
		289	}
		290
		291	break;
		292	}
		293
		294	++s;
		295
		296	uaccum = uaccum * 10 + dig;
		297	++eaccum;
		298
		299	// if we have too many digits, then recurse for more
		300	// we actually do this for rather few digits
		301	if (uaccum >= (UV_MAX - 9) / 10)
		302	{
		303	if (postdp) *expo -= eaccum;
		304	json_atof_scan1 (s, accum, expo, postdp, maxdepth);
		305	if (postdp) *expo += eaccum;
		306
		307	break;
		308	}
104	{	309	}
105	*clen = (STRLEN)-1;	310
		311	// this relies greatly on the quality of the pow ()
		312	// implementation of the platform, but a good
		313	// implementation is hard to beat.
		314	// (IEEE 754 conformant ones are required to be exact)
		315	if (postdp) *expo -= eaccum;
		316	*accum += uaccum * Perl_pow (10., *expo);
		317	*expo += eaccum;
		318	}
		319
		320	static NV
		321	json_atof (const char *s)
		322	{
		323	NV accum = 0.;
		324	int expo = 0;
		325	int neg = 0;
		326
		327	if (*s == '-')
		328	{
		329	++s;
		330	neg = 1;
		331	}
		332
		333	// a recursion depth of ten gives us >>500 bits
		334	json_atof_scan1 (s, &accum, &expo, 0, 10);
		335
		336	return neg ? -accum : accum;
		337	}
		338
		339	// target of scalar reference is bool? -1 == nope, 0 == false, 1 == true
		340	static int
		341	ref_bool_type (SV *sv)
		342	{
		343	svtype svt = SvTYPE (sv);
		344
		345	if (svt < SVt_PVAV)
		346	{
		347	STRLEN len = 0;
		348	char *pv = svt ? SvPV (sv, len) : 0;
		349
		350	if (len == 1)
		351	if (*pv == '1')
		352	return 1;
		353	else if (*pv == '0')
		354	return 0;
		355	}
		356
		357	return -1;
		358	}
		359
		360	// returns whether scalar is not a reference in the sense of allow_nonref
		361	static int
		362	json_nonref (SV *scalar)
		363	{
		364	if (!SvROK (scalar))
		365	return 1;
		366
		367	scalar = SvRV (scalar);
		368
		369	if (SvTYPE (scalar) >= SVt_PVMG)
		370	{
		371	if (SvSTASH (scalar) == bool_stash)
106	return (UV)-1;	372	return 1;
		373
		374	if (!SvOBJECT (scalar) && ref_bool_type (scalar) >= 0)
		375	return 1;
107	}	376	}
		377
		378	return 0;
108	}	379	}
109		380
110	/////////////////////////////////////////////////////////////////////////////	381	/////////////////////////////////////////////////////////////////////////////
111	// encoder	382	// encoder
112		383
…		…
116	char *cur; // SvPVX (sv) + current output position	387	char *cur; // SvPVX (sv) + current output position
117	char *end; // SvEND (sv)	388	char *end; // SvEND (sv)
118	SV *sv; // result scalar	389	SV *sv; // result scalar
119	JSON json;	390	JSON json;
120	U32 indent; // indentation level	391	U32 indent; // indentation level
121	U32 maxdepth; // max. indentation/recursion level	392	UV limit; // escape character values >= this value when encoding
122	} enc_t;	393	} enc_t;
123		394
124	inline void	395	INLINE void
125	need (enc_t *enc, STRLEN len)	396	need (enc_t *enc, STRLEN len)
126	{	397	{
127	if (expect_false (enc->cur + len >= enc->end))	398	if (expect_false ((uintptr_t)(enc->end - enc->cur) < len))
128	{	399	{
129	STRLEN cur = enc->cur - SvPVX (enc->sv);	400	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
130	SvGROW (enc->sv, cur + len + 1);	401	char *buf = json_sv_grow (enc->sv, cur, len);
131	enc->cur = SvPVX (enc->sv) + cur;	402	enc->cur = buf + cur;
132	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	403	enc->end = buf + SvLEN (enc->sv) - 1;
133	}	404	}
134	}	405	}
135		406
136	inline void	407	INLINE void
137	encode_ch (enc_t *enc, char ch)	408	encode_ch (enc_t *enc, char ch)
138	{	409	{
139	need (enc, 1);	410	need (enc, 1);
140	*enc->cur++ = ch;	411	*enc->cur++ = ch;
141	}	412	}
…		…
153		424
154	if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case	425	if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case
155	{	426	{
156	if (expect_false (ch == '"')) // but with slow exceptions	427	if (expect_false (ch == '"')) // but with slow exceptions
157	{	428	{
158	need (enc, len += 1);	429	need (enc, len + 1);
159	*enc->cur++ = '\\';	430	*enc->cur++ = '\\';
160	*enc->cur++ = '"';	431	*enc->cur++ = '"';
161	}	432	}
162	else if (expect_false (ch == '\\'))	433	else if (expect_false (ch == '\\'))
163	{	434	{
164	need (enc, len += 1);	435	need (enc, len + 1);
165	*enc->cur++ = '\\';	436	*enc->cur++ = '\\';
166	*enc->cur++ = '\\';	437	*enc->cur++ = '\\';
167	}	438	}
168	else	439	else
169	*enc->cur++ = ch;	440	*enc->cur++ = ch;
…		…
172	}	443	}
173	else	444	else
174	{	445	{
175	switch (ch)	446	switch (ch)
176	{	447	{
177	case '\010': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'b'; ++str; break;	448	case '\010': need (enc, len + 1); *enc->cur++ = '\\'; *enc->cur++ = 'b'; ++str; break;
178	case '\011': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 't'; ++str; break;	449	case '\011': need (enc, len + 1); *enc->cur++ = '\\'; *enc->cur++ = 't'; ++str; break;
179	case '\012': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'n'; ++str; break;	450	case '\012': need (enc, len + 1); *enc->cur++ = '\\'; *enc->cur++ = 'n'; ++str; break;
180	case '\014': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'f'; ++str; break;	451	case '\014': need (enc, len + 1); *enc->cur++ = '\\'; *enc->cur++ = 'f'; ++str; break;
181	case '\015': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'r'; ++str; break;	452	case '\015': need (enc, len + 1); *enc->cur++ = '\\'; *enc->cur++ = 'r'; ++str; break;
182		453
183	default:	454	default:
184	{	455	{
185	STRLEN clen;	456	STRLEN clen;
186	UV uch;	457	UV uch;
…		…
195	{	466	{
196	uch = ch;	467	uch = ch;
197	clen = 1;	468	clen = 1;
198	}	469	}
199		470
200	if (uch > 0x10FFFFUL)	471	if (uch < 0x80/*0x20*/ || uch >= enc->limit)
201	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
202
203	if (uch < 0x80 || enc->json.flags & F_ASCII || (enc->json.flags & F_LATIN1 && uch > 0xFF))
204	{	472	{
205	if (uch > 0xFFFFUL)	473	if (uch >= 0x10000UL)
206	{	474	{
		475	if (uch >= 0x110000UL)
		476	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
		477
207	need (enc, len += 11);	478	need (enc, len + 11);
208	sprintf (enc->cur, "\\u%04x\\u%04x",	479	sprintf (enc->cur, "\\u%04x\\u%04x",
209	(int)((uch - 0x10000) / 0x400 + 0xD800),	480	(int)((uch - 0x10000) / 0x400 + 0xD800),
210	(int)((uch - 0x10000) % 0x400 + 0xDC00));	481	(int)((uch - 0x10000) % 0x400 + 0xDC00));
211	enc->cur += 12;	482	enc->cur += 12;
212	}	483	}
213	else	484	else
214	{	485	{
215	static char hexdigit [16] = "0123456789abcdef";
216	need (enc, len += 5);	486	need (enc, len + 5);
217	*enc->cur++ = '\\';	487	*enc->cur++ = '\\';
218	*enc->cur++ = 'u';	488	*enc->cur++ = 'u';
219	*enc->cur++ = hexdigit [ uch >> 12 ];	489	*enc->cur++ = PL_hexdigit [ uch >> 12 ];
220	*enc->cur++ = hexdigit [(uch >> 8) & 15];	490	*enc->cur++ = PL_hexdigit [(uch >> 8) & 15];
221	*enc->cur++ = hexdigit [(uch >> 4) & 15];	491	*enc->cur++ = PL_hexdigit [(uch >> 4) & 15];
222	*enc->cur++ = hexdigit [(uch >> 0) & 15];	492	*enc->cur++ = PL_hexdigit [(uch >> 0) & 15];
223	}	493	}
224		494
225	str += clen;	495	str += clen;
226	}	496	}
227	else if (enc->json.flags & F_LATIN1)	497	else if (enc->json.flags & F_LATIN1)
…		…
229	*enc->cur++ = uch;	499	*enc->cur++ = uch;
230	str += clen;	500	str += clen;
231	}	501	}
232	else if (is_utf8)	502	else if (is_utf8)
233	{	503	{
234	need (enc, len += clen);	504	need (enc, len + clen);
235	do	505	do
236	{	506	{
237	*enc->cur++ = *str++;	507	*enc->cur++ = *str++;
238	}	508	}
239	while (--clen);	509	while (--clen);
240	}	510	}
241	else	511	else
242	{	512	{
243	need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed	513	need (enc, len + UTF8_MAXBYTES - 1); // never more than 11 bytes needed
244	enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0);	514	enc->cur = encode_utf8 (enc->cur, uch);
245	++str;	515	++str;
246	}	516	}
247	}	517	}
248	}	518	}
249	}	519	}
250		520
251	--len;	521	--len;
252	}	522	}
253	}	523	}
254		524
255	inline void	525	INLINE void
256	encode_indent (enc_t *enc)	526	encode_indent (enc_t *enc)
257	{	527	{
258	if (enc->json.flags & F_INDENT)	528	if (enc->json.flags & F_INDENT)
259	{	529	{
260	int spaces = enc->indent * INDENT_STEP;	530	int spaces = enc->indent * INDENT_STEP;
…		…
263	memset (enc->cur, ' ', spaces);	533	memset (enc->cur, ' ', spaces);
264	enc->cur += spaces;	534	enc->cur += spaces;
265	}	535	}
266	}	536	}
267		537
268	inline void	538	INLINE void
269	encode_space (enc_t *enc)	539	encode_space (enc_t *enc)
270	{	540	{
271	need (enc, 1);	541	need (enc, 1);
272	encode_ch (enc, ' ');	542	encode_ch (enc, ' ');
273	}	543	}
274		544
275	inline void	545	INLINE void
276	encode_nl (enc_t *enc)	546	encode_nl (enc_t *enc)
277	{	547	{
278	if (enc->json.flags & F_INDENT)	548	if (enc->json.flags & F_INDENT)
279	{	549	{
280	need (enc, 1);	550	need (enc, 1);
281	encode_ch (enc, '\n');	551	encode_ch (enc, '\n');
282	}	552	}
283	}	553	}
284		554
285	inline void	555	INLINE void
286	encode_comma (enc_t *enc)	556	encode_comma (enc_t *enc)
287	{	557	{
288	encode_ch (enc, ',');	558	encode_ch (enc, ',');
289		559
290	if (enc->json.flags & F_INDENT)	560	if (enc->json.flags & F_INDENT)
…		…
298	static void	568	static void
299	encode_av (enc_t *enc, AV *av)	569	encode_av (enc_t *enc, AV *av)
300	{	570	{
301	int i, len = av_len (av);	571	int i, len = av_len (av);
302		572
303	if (enc->indent >= enc->maxdepth)	573	if (enc->indent >= enc->json.max_depth)
304	croak ("data structure too deep (hit recursion limit)");	574	croak (ERR_NESTING_EXCEEDED);
305		575
306	encode_ch (enc, '['); encode_nl (enc);	576	encode_ch (enc, '[');
307	++enc->indent;
308		577
		578	if (len >= 0)
		579	{
		580	encode_nl (enc); ++enc->indent;
		581
309	for (i = 0; i <= len; ++i)	582	for (i = 0; i <= len; ++i)
310	{	583	{
		584	SV **svp = av_fetch (av, i, 0);
		585
311	encode_indent (enc);	586	encode_indent (enc);
312	encode_sv (enc, *av_fetch (av, i, 0));
313		587
		588	if (svp)
		589	encode_sv (enc, *svp);
		590	else
		591	encode_str (enc, "null", 4, 0);
		592
314	if (i < len)	593	if (i < len)
315	encode_comma (enc);	594	encode_comma (enc);
316	}	595	}
317		596
		597	encode_nl (enc); --enc->indent; encode_indent (enc);
		598	}
		599
318	encode_nl (enc);	600	encode_ch (enc, ']');
319
320	--enc->indent;
321	encode_indent (enc); encode_ch (enc, ']');
322	}	601	}
323		602
324	static void	603	static void
325	encode_he (enc_t *enc, HE *he)	604	encode_hk (enc_t *enc, HE *he)
326	{	605	{
327	encode_ch (enc, '"');	606	encode_ch (enc, '"');
328		607
329	if (HeKLEN (he) == HEf_SVKEY)	608	if (HeKLEN (he) == HEf_SVKEY)
330	{	609	{
331	SV *sv = HeSVKEY (he);	610	SV *sv = HeSVKEY (he);
332	STRLEN len;	611	STRLEN len;
333	char *str;	612	char *str;
334		613
335	SvGETMAGIC (sv);	614	SvGETMAGIC (sv);
336	str = SvPV (sv, len);	615	str = SvPV (sv, len);
337		616
338	encode_str (enc, str, len, SvUTF8 (sv));	617	encode_str (enc, str, len, SvUTF8 (sv));
339	}	618	}
…		…
343	encode_ch (enc, '"');	622	encode_ch (enc, '"');
344		623
345	if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);	624	if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);
346	encode_ch (enc, ':');	625	encode_ch (enc, ':');
347	if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);	626	if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);
348	encode_sv (enc, HeVAL (he));
349	}	627	}
350		628
351	// compare hash entries, used when all keys are bytestrings	629	// compare hash entries, used when all keys are bytestrings
352	static int	630	static int
353	he_cmp_fast (const void *a_, const void *b_)	631	he_cmp_fast (const void *a_, const void *b_)
…		…
358	HE *b = *(HE **)b_;	636	HE *b = *(HE **)b_;
359		637
360	STRLEN la = HeKLEN (a);	638	STRLEN la = HeKLEN (a);
361	STRLEN lb = HeKLEN (b);	639	STRLEN lb = HeKLEN (b);
362		640
363	if (!(cmp = memcmp (HeKEY (a), HeKEY (b), la < lb ? la : lb)))	641	if (!(cmp = memcmp (HeKEY (b), HeKEY (a), lb < la ? lb : la)))
364	cmp = la - lb;	642	cmp = lb - la;
365		643
366	return cmp;	644	return cmp;
367	}	645	}
368		646
369	// compare hash entries, used when some keys are sv's or utf-x	647	// compare hash entries, used when some keys are sv's or utf-x
370	static int	648	static int
371	he_cmp_slow (const void *a, const void *b)	649	he_cmp_slow (const void *a, const void *b)
372	{	650	{
373	return sv_cmp (HeSVKEY_force (*(HE **)a), HeSVKEY_force (*(HE **)b));	651	return sv_cmp (HeSVKEY_force (*(HE **)b), HeSVKEY_force (*(HE **)a));
374	}	652	}
375		653
376	static void	654	static void
377	encode_hv (enc_t *enc, HV *hv)	655	encode_hv (enc_t *enc, HV *hv)
378	{	656	{
379	int count, i;	657	HE *he;
380		658
381	if (enc->indent >= enc->maxdepth)	659	if (enc->indent >= enc->json.max_depth)
382	croak ("data structure too deep (hit recursion limit)");	660	croak (ERR_NESTING_EXCEEDED);
383		661
384	encode_ch (enc, '{'); encode_nl (enc); ++enc->indent;	662	encode_ch (enc, '{');
385		663
386	if ((count = hv_iterinit (hv)))
387	{
388	// for canonical output we have to sort by keys first	664	// for canonical output we have to sort by keys first
389	// actually, this is mostly due to the stupid so-called	665	// actually, this is mostly due to the stupid so-called
390	// security workaround added somewhere in 5.8.x.	666	// security workaround added somewhere in 5.8.x
391	// that randomises hash orderings	667	// that randomises hash orderings
392	if (enc->json.flags & F_CANONICAL)	668	if (enc->json.flags & F_CANONICAL && !SvRMAGICAL (hv))
		669	{
		670	int count = hv_iterinit (hv);
		671
		672	if (SvMAGICAL (hv))
393	{	673	{
		674	// need to count by iterating. could improve by dynamically building the vector below
		675	// but I don't care for the speed of this special case.
		676	// note also that we will run into undefined behaviour when the two iterations
		677	// do not result in the same count, something I might care for in some later release.
		678
		679	count = 0;
		680	while (hv_iternext (hv))
		681	++count;
		682
		683	hv_iterinit (hv);
		684	}
		685
		686	if (count)
		687	{
394	int fast = 1;	688	int i, fast = 1;
395	HE *he;	689	HE *hes_stack [STACK_HES];
396	#if defined(__BORLANDC__) || defined(_MSC_VER)	690	HE **hes = hes_stack;
397	HE **hes = _alloca (count * sizeof (HE));	691
398	#else	692	// allocate larger arrays on the heap
399	HE *hes [count]; // if your compiler dies here, you need to enable C99 mode	693	if (count > STACK_HES)
400	#endif	694	{
		695	SV *sv = sv_2mortal (NEWSV (0, count * sizeof (*hes)));
		696	hes = (HE **)SvPVX (sv);
		697	}
401		698
402	i = 0;	699	i = 0;
403	while ((he = hv_iternext (hv)))	700	while ((he = hv_iternext (hv)))
404	{	701	{
405	hes [i++] = he;	702	hes [i++] = he;
…		…
427		724
428	FREETMPS;	725	FREETMPS;
429	LEAVE;	726	LEAVE;
430	}	727	}
431		728
432	for (i = 0; i < count; ++i)	729	encode_nl (enc); ++enc->indent;
		730
		731	while (count--)
433	{	732	{
434	encode_indent (enc);	733	encode_indent (enc);
		734	he = hes [count];
435	encode_he (enc, hes [i]);	735	encode_hk (enc, he);
		736	encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
436		737
437	if (i < count - 1)	738	if (count)
438	encode_comma (enc);	739	encode_comma (enc);
439	}	740	}
440		741
441	encode_nl (enc);	742	encode_nl (enc); --enc->indent; encode_indent (enc);
442	}	743	}
		744	}
443	else	745	else
		746	{
		747	if (hv_iterinit (hv) || SvMAGICAL (hv))
		748	if ((he = hv_iternext (hv)))
444	{	749	{
445	HE *he = hv_iternext (hv);	750	encode_nl (enc); ++enc->indent;
446		751
447	for (;;)	752	for (;;)
448	{	753	{
449	encode_indent (enc);	754	encode_indent (enc);
450	encode_he (enc, he);	755	encode_hk (enc, he);
		756	encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
451		757
452	if (!(he = hv_iternext (hv)))	758	if (!(he = hv_iternext (hv)))
453	break;	759	break;
454		760
455	encode_comma (enc);	761	encode_comma (enc);
456	}	762	}
457		763
458	encode_nl (enc);	764	encode_nl (enc); --enc->indent; encode_indent (enc);
459	}	765	}
460	}	766	}
461		767
462	--enc->indent; encode_indent (enc); encode_ch (enc, '}');	768	encode_ch (enc, '}');
463	}	769	}
464		770
465	// encode objects, arrays and special \0=false and \1=true values.	771	// encode objects, arrays and special \0=false and \1=true values.
466	static void	772	static void
467	encode_rv (enc_t *enc, SV *sv)	773	encode_rv (enc_t *enc, SV *sv)
468	{	774	{
469	svtype svt;	775	svtype svt;
		776	GV *method;
470		777
471	SvGETMAGIC (sv);	778	SvGETMAGIC (sv);
472	svt = SvTYPE (sv);	779	svt = SvTYPE (sv);
473		780
474	if (expect_false (SvOBJECT (sv)))	781	if (expect_false (SvOBJECT (sv)))
475	{	782	{
476	if (SvSTASH (sv) == json_boolean_stash)	783	HV *stash = SvSTASH (sv);
		784
		785	if (stash == bool_stash)
477	{	786	{
478	if (SvIV (sv))
479	encode_str (enc, "true", 4, 0);	787	if (SvIV (sv)) encode_str (enc, "true" , 4, 0);
480	else
481	encode_str (enc, "false", 5, 0);	788	else encode_str (enc, "false", 5, 0);
482	}	789	}
		790	else if ((enc->json.flags & F_ALLOW_TAGS) && (method = gv_fetchmethod_autoload (stash, "FREEZE", 0)))
		791	{
		792	int count;
		793	dSP;
		794
		795	ENTER; SAVETMPS;
		796	PUSHMARK (SP);
		797	EXTEND (SP, 2);
		798	// we re-bless the reference to get overload and other niceties right
		799	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		800	PUSHs (sv_json);
		801
		802	PUTBACK;
		803	count = call_sv ((SV *)GvCV (method), G_ARRAY);
		804	SPAGAIN;
		805
		806	// catch this surprisingly common error
		807	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		808	croak ("%s::FREEZE method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		809
		810	encode_ch (enc, '(');
		811	encode_ch (enc, '"');
		812	encode_str (enc, HvNAME (stash), HvNAMELEN (stash), HvNAMEUTF8 (stash));
		813	encode_ch (enc, '"');
		814	encode_ch (enc, ')');
		815	encode_ch (enc, '[');
		816
		817	if (count)
		818	{
		819	int i;
		820
		821	for (i = 0; i < count - 1; ++i)
		822	{
		823	encode_sv (enc, SP[i + 1 - count]);
		824	encode_ch (enc, ',');
		825	}
		826
		827	encode_sv (enc, TOPs);
		828	SP -= count;
		829	}
		830
		831	encode_ch (enc, ']');
		832
		833	FREETMPS; LEAVE;
		834	}
		835	else if ((enc->json.flags & F_CONV_BLESSED) && (method = gv_fetchmethod_autoload (stash, "TO_JSON", 0)))
		836	{
		837	dSP;
		838
		839	ENTER; SAVETMPS;
		840	PUSHMARK (SP);
		841	// we re-bless the reference to get overload and other niceties right
		842	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		843
		844	// calling with G_SCALAR ensures that we always get a 1 return value
		845	PUTBACK;
		846	call_sv ((SV *)GvCV (method), G_SCALAR);
		847	SPAGAIN;
		848
		849	// catch this surprisingly common error
		850	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		851	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		852
		853	sv = POPs;
		854	PUTBACK;
		855
		856	encode_sv (enc, sv);
		857
		858	FREETMPS; LEAVE;
		859	}
		860	else if (enc->json.flags & F_ALLOW_BLESSED)
		861	encode_str (enc, "null", 4, 0);
483	else	862	else
484	{
485	#if 0
486	if (0 && sv_derived_from (rv, "JSON::Literal"))
487	{
488	// not yet
489	}
490	#endif
491	if (enc->json.flags & F_CONV_BLESSED)
492	{
493	// we re-bless the reference to get overload and other niceties right
494	GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 1);
495
496	if (to_json)
497	{
498	dSP; ENTER; SAVETMPS; PUSHMARK (SP);
499	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
500
501	// calling with G_SCALAR ensures that we always get a 1 reutrn value
502	// check anyways.
503	PUTBACK;
504	assert (1 == call_sv ((SV *)GvCV (to_json), G_SCALAR));
505	SPAGAIN;
506
507	encode_sv (enc, POPs);
508
509	FREETMPS; LEAVE;
510	}
511	else if (enc->json.flags & F_ALLOW_BLESSED)
512	encode_str (enc, "null", 4, 0);
513	else
514	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
515	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
516	}
517	else if (enc->json.flags & F_ALLOW_BLESSED)
518	encode_str (enc, "null", 4, 0);
519	else
520	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	863	croak ("encountered object '%s', but neither allow_blessed, convert_blessed nor allow_tags settings are enabled (or TO_JSON/FREEZE method missing)",
521	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	864	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
522	}
523	}	865	}
524	else if (svt == SVt_PVHV)	866	else if (svt == SVt_PVHV)
525	encode_hv (enc, (HV *)sv);	867	encode_hv (enc, (HV *)sv);
526	else if (svt == SVt_PVAV)	868	else if (svt == SVt_PVAV)
527	encode_av (enc, (AV *)sv);	869	encode_av (enc, (AV *)sv);
528	else if (svt < SVt_PVAV)	870	else if (svt < SVt_PVAV)
529	{	871	{
530	STRLEN len = 0;	872	int bool_type = ref_bool_type (sv);
531	char *pv = svt ? SvPV (sv, len) : 0;
532		873
533	if (len == 1 && *pv == '1')	874	if (bool_type == 1)
534	encode_str (enc, "true", 4, 0);	875	encode_str (enc, "true", 4, 0);
535	else if (len == 1 && *pv == '0')	876	else if (bool_type == 0)
536	encode_str (enc, "false", 5, 0);	877	encode_str (enc, "false", 5, 0);
		878	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		879	encode_str (enc, "null", 4, 0);
537	else	880	else
538	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",	881	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
539	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	882	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
540	}	883	}
		884	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		885	encode_str (enc, "null", 4, 0);
541	else	886	else
542	croak ("encountered %s, but JSON can only represent references to arrays or hashes",	887	croak ("encountered %s, but JSON can only represent references to arrays or hashes",
543	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	888	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
544	}	889	}
545		890
…		…
563	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);	908	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
564	enc->cur += strlen (enc->cur);	909	enc->cur += strlen (enc->cur);
565	}	910	}
566	else if (SvIOKp (sv))	911	else if (SvIOKp (sv))
567	{	912	{
568	// we assume we can always read an IV as a UV	913	// we assume we can always read an IV as a UV and vice versa
569	if (SvUV (sv) & ~(UV)0x7fff)	914	// we assume two's complement
570	{	915	// we assume no aliasing issues in the union
571	// large integer, use the (rather slow) snprintf way.	916	if (SvIsUV (sv) ? SvUVX (sv) <= 59000
572	need (enc, sizeof (UV) * 3);	917	: SvIVX (sv) <= 59000 && SvIVX (sv) >= -59000)
573	enc->cur +=
574	SvIsUV(sv)
575	? snprintf (enc->cur, sizeof (UV) * 3, "%"UVuf, (UV)SvUVX (sv))
576	: snprintf (enc->cur, sizeof (UV) * 3, "%"IVdf, (IV)SvIVX (sv));
577	}
578	else
579	{	918	{
580	// optimise the "small number case"	919	// optimise the "small number case"
581	// code will likely be branchless and use only a single multiplication	920	// code will likely be branchless and use only a single multiplication
		921	// works for numbers up to 59074
582	I32 i = SvIV (sv);	922	I32 i = SvIVX (sv);
583	U32 u;	923	U32 u;
584	char digit, nz = 0;	924	char digit, nz = 0;
585		925
586	need (enc, 6);	926	need (enc, 6);
587		927
…		…
593		933
594	// now output digit by digit, each time masking out the integer part	934	// now output digit by digit, each time masking out the integer part
595	// and multiplying by 5 while moving the decimal point one to the right,	935	// and multiplying by 5 while moving the decimal point one to the right,
596	// resulting in a net multiplication by 10.	936	// resulting in a net multiplication by 10.
597	// we always write the digit to memory but conditionally increment	937	// we always write the digit to memory but conditionally increment
598	// the pointer, to ease the usage of conditional move instructions.	938	// the pointer, to enable the use of conditional move instructions.
599	digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffff) * 5;	939	digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffffUL) * 5;
600	digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffff) * 5;	940	digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffffUL) * 5;
601	digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffff) * 5;	941	digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffffUL) * 5;
602	digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffff) * 5;	942	digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffffUL) * 5;
603	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'	943	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
604	}	944	}
		945	else
		946	{
		947	// large integer, use the (rather slow) snprintf way.
		948	need (enc, IVUV_MAXCHARS);
		949	enc->cur +=
		950	SvIsUV(sv)
		951	? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv))
		952	: snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv));
		953	}
605	}	954	}
606	else if (SvROK (sv))	955	else if (SvROK (sv))
607	encode_rv (enc, SvRV (sv));	956	encode_rv (enc, SvRV (sv));
608	else if (!SvOK (sv))	957	else if (!SvOK (sv) || enc->json.flags & F_ALLOW_UNKNOWN)
609	encode_str (enc, "null", 4, 0);	958	encode_str (enc, "null", 4, 0);
610	else	959	else
611	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",	960	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, check your input data",
612	SvPV_nolen (sv), SvFLAGS (sv));	961	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
613	}	962	}
614		963
615	static SV *	964	static SV *
616	encode_json (SV *scalar, JSON *json)	965	encode_json (SV *scalar, JSON *json)
617	{	966	{
618	enc_t enc;	967	enc_t enc;
619		968
620	if (!(json->flags & F_ALLOW_NONREF) && !SvROK (scalar))	969	if (!(json->flags & F_ALLOW_NONREF) && json_nonref (scalar))
621	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");	970	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
622		971
623	enc.json = *json;	972	enc.json = *json;
624	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	973	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
625	enc.cur = SvPVX (enc.sv);	974	enc.cur = SvPVX (enc.sv);
626	enc.end = SvEND (enc.sv);	975	enc.end = SvEND (enc.sv);
627	enc.indent = 0;	976	enc.indent = 0;
628	enc.maxdepth = DEC_DEPTH (enc.json.flags);	977	enc.limit = enc.json.flags & F_ASCII ? 0x000080UL
		978	: enc.json.flags & F_LATIN1 ? 0x000100UL
		979	: 0x110000UL;
629		980
630	SvPOK_only (enc.sv);	981	SvPOK_only (enc.sv);
631	encode_sv (&enc, scalar);	982	encode_sv (&enc, scalar);
		983	encode_nl (&enc);
632		984
633	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	985	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
634	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	986	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
635		987
636	if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8)))	988	if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8)))
…		…
654	JSON json;	1006	JSON json;
655	U32 depth; // recursion depth	1007	U32 depth; // recursion depth
656	U32 maxdepth; // recursion depth limit	1008	U32 maxdepth; // recursion depth limit
657	} dec_t;	1009	} dec_t;
658		1010
659	inline void	1011	INLINE void
		1012	decode_comment (dec_t *dec)
		1013	{
		1014	// only '#'-style comments allowed a.t.m.
		1015
		1016	while (*dec->cur && *dec->cur != 0x0a && *dec->cur != 0x0d)
		1017	++dec->cur;
		1018	}
		1019
		1020	INLINE void
660	decode_ws (dec_t *dec)	1021	decode_ws (dec_t *dec)
661	{	1022	{
662	for (;;)	1023	for (;;)
663	{	1024	{
664	char ch = *dec->cur;	1025	char ch = *dec->cur;
665		1026
666	if (ch > 0x20	1027	if (ch > 0x20)
		1028	{
		1029	if (expect_false (ch == '#'))
		1030	{
		1031	if (dec->json.flags & F_RELAXED)
		1032	decode_comment (dec);
		1033	else
		1034	break;
		1035	}
		1036	else
		1037	break;
		1038	}
667	|| (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09))	1039	else if (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)
668	break;	1040	break; // parse error, but let higher level handle it, gives better error messages
669		1041
670	++dec->cur;	1042	++dec->cur;
671	}	1043	}
672	}	1044	}
673		1045
…		…
677	if (*dec->cur != ch) \	1049	if (*dec->cur != ch) \
678	ERR (# ch " expected"); \	1050	ERR (# ch " expected"); \
679	++dec->cur; \	1051	++dec->cur; \
680	SE	1052	SE
681		1053
682	#define DEC_INC_DEPTH if (++dec->depth > dec->maxdepth) ERR ("json datastructure exceeds maximum nesting level (set a higher max_depth)")	1054	#define DEC_INC_DEPTH if (++dec->depth > dec->json.max_depth) ERR (ERR_NESTING_EXCEEDED)
683	#define DEC_DEC_DEPTH --dec->depth	1055	#define DEC_DEC_DEPTH --dec->depth
684		1056
685	static SV *decode_sv (dec_t *dec);	1057	static SV *decode_sv (dec_t *dec);
686		1058
687	static signed char decode_hexdigit[256];	1059	static signed char decode_hexdigit[256];
…		…
779		1151
780	if (hi >= 0x80)	1152	if (hi >= 0x80)
781	{	1153	{
782	utf8 = 1;	1154	utf8 = 1;
783		1155
784	cur = (char *)uvuni_to_utf8_flags (cur, hi, 0);	1156	cur = encode_utf8 (cur, hi);
785	}	1157	}
786	else	1158	else
787	*cur++ = hi;	1159	*cur++ = hi;
788	}	1160	}
789	break;	1161	break;
…		…
791	default:	1163	default:
792	--dec_cur;	1164	--dec_cur;
793	ERR ("illegal backslash escape sequence in string");	1165	ERR ("illegal backslash escape sequence in string");
794	}	1166	}
795	}	1167	}
796	else if (expect_true (ch >= 0x20 && ch <= 0x7f))	1168	else if (expect_true (ch >= 0x20 && ch < 0x80))
797	*cur++ = ch;	1169	*cur++ = ch;
798	else if (ch >= 0x80)	1170	else if (ch >= 0x80)
799	{	1171	{
800	STRLEN clen;	1172	STRLEN clen;
801	UV uch;
802		1173
803	--dec_cur;	1174	--dec_cur;
804		1175
805	uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen);	1176	decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
806	if (clen == (STRLEN)-1)	1177	if (clen == (STRLEN)-1)
807	ERR ("malformed UTF-8 character in JSON string");	1178	ERR ("malformed UTF-8 character in JSON string");
808		1179
809	do	1180	do
810	*cur++ = *dec_cur++;	1181	*cur++ = *dec_cur++;
811	while (--clen);	1182	while (--clen);
812		1183
813	utf8 = 1;	1184	utf8 = 1;
814	}	1185	}
		1186	else if (ch == '\t' && dec->json.flags & F_RELAXED)
		1187	*cur++ = ch;
815	else	1188	else
816	{	1189	{
817	--dec_cur;	1190	--dec_cur;
818		1191
819	if (!ch)	1192	if (!ch)
…		…
827	{	1200	{
828	STRLEN len = cur - buf;	1201	STRLEN len = cur - buf;
829		1202
830	if (sv)	1203	if (sv)
831	{	1204	{
832	SvGROW (sv, SvCUR (sv) + len + 1);	1205	STRLEN cur = SvCUR (sv);
		1206
		1207	if (SvLEN (sv) - cur <= len)
		1208	json_sv_grow (sv, cur, len);
		1209
833	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);	1210	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);
834	SvCUR_set (sv, SvCUR (sv) + len);	1211	SvCUR_set (sv, SvCUR (sv) + len);
835	}	1212	}
836	else	1213	else
837	sv = newSVpvn (buf, len);	1214	sv = newSVpvn (buf, len);
…		…
922	is_nv = 1;	1299	is_nv = 1;
923	}	1300	}
924		1301
925	if (!is_nv)	1302	if (!is_nv)
926	{	1303	{
		1304	int len = dec->cur - start;
		1305
927	// special case the rather common 1..4-digit-int case, assumes 32 bit ints or so	1306	// special case the rather common 1..5-digit-int case
928	if (*start == '-')	1307	if (*start == '-')
929	switch (dec->cur - start)	1308	switch (len)
930	{	1309	{
931	case 2: return newSViv (-( start [1] - '0' * 1));	1310	case 2: return newSViv (-(IV)( start [1] - '0' * 1));
932	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));	1311	case 3: return newSViv (-(IV)( start [1] * 10 + start [2] - '0' * 11));
933	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));	1312	case 4: return newSViv (-(IV)( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
934	case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));	1313	case 5: return newSViv (-(IV)( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
		1314	case 6: return newSViv (-(IV)(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));
935	}	1315	}
936	else	1316	else
937	switch (dec->cur - start)	1317	switch (len)
938	{	1318	{
939	case 1: return newSViv ( start [0] - '0' * 1);	1319	case 1: return newSViv ( start [0] - '0' * 1);
940	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);	1320	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
941	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);	1321	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
942	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);	1322	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
		1323	case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);
943	}	1324	}
944		1325
945	{	1326	{
946	UV uv;	1327	UV uv;
947	int numtype = grok_number (start, dec->cur - start, &uv);	1328	int numtype = grok_number (start, len, &uv);
948	if (numtype & IS_NUMBER_IN_UV)	1329	if (numtype & IS_NUMBER_IN_UV)
949	if (numtype & IS_NUMBER_NEG)	1330	if (numtype & IS_NUMBER_NEG)
950	{	1331	{
951	if (uv < (UV)IV_MIN)	1332	if (uv < (UV)IV_MIN)
952	return newSViv (-(IV)uv);	1333	return newSViv (-(IV)uv);
953	}	1334	}
954	else	1335	else
955	return newSVuv (uv);	1336	return newSVuv (uv);
956
957	// here would likely be the place for bigint support
958	}	1337	}
959	}
960		1338
961	// if we ever support bigint or bigfloat, this is the place for bigfloat	1339	len -= *start == '-' ? 1 : 0;
		1340
		1341	// does not fit into IV or UV, try NV
		1342	if (len <= NV_DIG)
		1343	// fits into NV without loss of precision
		1344	return newSVnv (json_atof (start));
		1345
		1346	// everything else fails, convert it to a string
		1347	return newSVpvn (start, dec->cur - start);
		1348	}
		1349
		1350	// loss of precision here
962	return newSVnv (Atof (start));	1351	return newSVnv (json_atof (start));
963		1352
964	fail:	1353	fail:
965	return 0;	1354	return 0;
966	}	1355	}
967		1356
…		…
991	if (*dec->cur == ']')	1380	if (*dec->cur == ']')
992	{	1381	{
993	++dec->cur;	1382	++dec->cur;
994	break;	1383	break;
995	}	1384	}
996		1385
997	if (*dec->cur != ',')	1386	if (*dec->cur != ',')
998	ERR (", or ] expected while parsing array");	1387	ERR (", or ] expected while parsing array");
999		1388
1000	++dec->cur;	1389	++dec->cur;
		1390
		1391	decode_ws (dec);
		1392
		1393	if (*dec->cur == ']' && dec->json.flags & F_RELAXED)
		1394	{
		1395	++dec->cur;
		1396	break;
		1397	}
1001	}	1398	}
1002		1399
1003	DEC_DEC_DEPTH;	1400	DEC_DEC_DEPTH;
1004	return newRV_noinc ((SV *)av);	1401	return newRV_noinc ((SV *)av);
1005		1402
…		…
1021	if (*dec->cur == '}')	1418	if (*dec->cur == '}')
1022	++dec->cur;	1419	++dec->cur;
1023	else	1420	else
1024	for (;;)	1421	for (;;)
1025	{	1422	{
1026	decode_ws (dec); EXPECT_CH ('"');	1423	EXPECT_CH ('"');
1027		1424
1028	// heuristic: assume that	1425	// heuristic: assume that
1029	// a) decode_str + hv_store_ent are abysmally slow.	1426	// a) decode_str + hv_store_ent are abysmally slow.
1030	// b) most hash keys are short, simple ascii text.	1427	// b) most hash keys are short, simple ascii text.
1031	// => try to "fast-match" such strings to avoid	1428	// => try to "fast-match" such strings to avoid
…		…
1035	char *p = dec->cur;	1432	char *p = dec->cur;
1036	char *e = p + 24; // only try up to 24 bytes	1433	char *e = p + 24; // only try up to 24 bytes
1037		1434
1038	for (;;)	1435	for (;;)
1039	{	1436	{
1040	// the >= 0x80 is true on most architectures	1437	// the >= 0x80 is false on most architectures
1041	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')	1438	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
1042	{	1439	{
1043	// slow path, back up and use decode_str	1440	// slow path, back up and use decode_str
1044	SV *key = decode_str (dec);	1441	SV *key = decode_str (dec);
1045	if (!key)	1442	if (!key)
1046	goto fail;	1443	goto fail;
1047		1444
1048	decode_ws (dec); EXPECT_CH (':');	1445	decode_ws (dec); EXPECT_CH (':');
1049		1446
		1447	decode_ws (dec);
1050	value = decode_sv (dec);	1448	value = decode_sv (dec);
1051	if (!value)	1449	if (!value)
1052	{	1450	{
1053	SvREFCNT_dec (key);	1451	SvREFCNT_dec (key);
1054	goto fail;	1452	goto fail;
…		…
1066	int len = p - key;	1464	int len = p - key;
1067	dec->cur = p + 1;	1465	dec->cur = p + 1;
1068		1466
1069	decode_ws (dec); EXPECT_CH (':');	1467	decode_ws (dec); EXPECT_CH (':');
1070		1468
		1469	decode_ws (dec);
1071	value = decode_sv (dec);	1470	value = decode_sv (dec);
1072	if (!value)	1471	if (!value)
1073	goto fail;	1472	goto fail;
1074		1473
1075	hv_store (hv, key, len, value, 0);	1474	hv_store (hv, key, len, value, 0);
…		…
1091		1490
1092	if (*dec->cur != ',')	1491	if (*dec->cur != ',')
1093	ERR (", or } expected while parsing object/hash");	1492	ERR (", or } expected while parsing object/hash");
1094		1493
1095	++dec->cur;	1494	++dec->cur;
		1495
		1496	decode_ws (dec);
		1497
		1498	if (*dec->cur == '}' && dec->json.flags & F_RELAXED)
		1499	{
		1500	++dec->cur;
		1501	break;
		1502	}
1096	}	1503	}
1097		1504
1098	DEC_DEC_DEPTH;	1505	DEC_DEC_DEPTH;
1099	sv = newRV_noinc ((SV *)hv);	1506	sv = newRV_noinc ((SV *)hv);
1100		1507
1101	// check filter callbacks	1508	// check filter callbacks
1102	if (dec->json.flags & F_HOOK)	1509	if (expect_false (dec->json.flags & F_HOOK))
1103	{	1510	{
1104	if (dec->json.cb_sk_object && HvKEYS (hv) == 1)	1511	if (dec->json.cb_sk_object && HvKEYS (hv) == 1)
1105	{	1512	{
1106	HE *cb, *he;	1513	HE *cb, *he;
1107		1514
1108	hv_iterinit (hv);	1515	hv_iterinit (hv);
1109	he = hv_iternext (hv);	1516	he = hv_iternext (hv);
1110	hv_iterinit (hv);	1517	hv_iterinit (hv);
1111		1518
1112	// the next line creates a mortal sv each time its called.	1519	// the next line creates a mortal sv each time it's called.
1113	// might want to optimise this for common cases.	1520	// might want to optimise this for common cases.
1114	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);	1521	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);
1115		1522
1116	if (cb)	1523	if (cb)
1117	{	1524	{
		1525	dSP;
1118	int count;	1526	int count;
		1527
1119	ENTER; SAVETMPS;	1528	ENTER; SAVETMPS;
1120
1121	dSP; PUSHMARK (SP);	1529	PUSHMARK (SP);
1122	XPUSHs (HeVAL (he));	1530	XPUSHs (HeVAL (he));
		1531	sv_2mortal (sv);
1123		1532
1124	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;	1533	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
1125		1534
1126	if (count == 1)	1535	if (count == 1)
1127	{	1536	{
1128	sv = newSVsv (POPs);	1537	sv = newSVsv (POPs);
1129	FREETMPS; LEAVE;	1538	FREETMPS; LEAVE;
1130	return sv;	1539	return sv;
1131	}	1540	}
		1541	else if (count)
		1542	croak ("filter_json_single_key_object callbacks must not return more than one scalar");
1132		1543
		1544	SvREFCNT_inc (sv);
1133	FREETMPS; LEAVE;	1545	FREETMPS; LEAVE;
1134	}	1546	}
1135	}	1547	}
1136		1548
1137	if (dec->json.cb_object)	1549	if (dec->json.cb_object)
1138	{	1550	{
		1551	dSP;
1139	int count;	1552	int count;
		1553
1140	ENTER; SAVETMPS;	1554	ENTER; SAVETMPS;
1141		1555	PUSHMARK (SP);
1142	dSP; ENTER; SAVETMPS; PUSHMARK (SP);
1143	XPUSHs (sv_2mortal (sv));	1556	XPUSHs (sv_2mortal (sv));
1144		1557
1145	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;	1558	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;
1146		1559
1147	if (count == 1)	1560	if (count == 1)
1148	{
1149	sv = newSVsv (POPs);	1561	sv = newSVsv (POPs);
1150	FREETMPS; LEAVE;	1562	else if (count == 0)
1151	return sv;
1152	}
1153
1154	SvREFCNT_inc (sv);	1563	SvREFCNT_inc (sv);
		1564	else
		1565	croak ("filter_json_object callbacks must not return more than one scalar");
		1566
1155	FREETMPS; LEAVE;	1567	FREETMPS; LEAVE;
1156	}	1568	}
1157	}	1569	}
1158		1570
1159	return sv;	1571	return sv;
…		…
1163	DEC_DEC_DEPTH;	1575	DEC_DEC_DEPTH;
1164	return 0;	1576	return 0;
1165	}	1577	}
1166		1578
1167	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 *
1168	decode_sv (dec_t *dec)	1663	decode_sv (dec_t *dec)
1169	{	1664	{
1170	decode_ws (dec);
1171
1172	// the beauty of JSON: you need exactly one character lookahead	1665	// the beauty of JSON: you need exactly one character lookahead
1173	// to parse anything.	1666	// to parse everything.
1174	switch (*dec->cur)	1667	switch (*dec->cur)
1175	{	1668	{
1176	case '"': ++dec->cur; return decode_str (dec);	1669	case '"': ++dec->cur; return decode_str (dec);
1177	case '[': ++dec->cur; return decode_av (dec);	1670	case '[': ++dec->cur; return decode_av (dec);
1178	case '{': ++dec->cur; return decode_hv (dec);	1671	case '{': ++dec->cur; return decode_hv (dec);
		1672	case '(': return decode_tag (dec);
1179		1673
1180	case '-':	1674	case '-':
1181	case '0': case '1': case '2': case '3': case '4':	1675	case '0': case '1': case '2': case '3': case '4':
1182	case '5': case '6': case '7': case '8': case '9':	1676	case '5': case '6': case '7': case '8': case '9':
1183	return decode_num (dec);	1677	return decode_num (dec);
1184		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
1185	case 't':	1694	case 't':
1186	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1695	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
1187	{	1696	{
1188	dec->cur += 4;	1697	dec->cur += 4;
1189	return SvREFCNT_inc (json_true);	1698
		1699	if (expect_false (!dec->json.v_true))
		1700	dec->json.v_true = GET_BOOL (true);
		1701
		1702	return newSVsv (dec->json.v_true);
1190	}	1703	}
1191	else	1704	else
1192	ERR ("'true' expected");	1705	ERR ("'true' expected");
1193
1194	break;
1195
1196	case 'f':
1197	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
1198	{
1199	dec->cur += 5;
1200	return SvREFCNT_inc (json_false);
1201	}
1202	else
1203	ERR ("'false' expected");
1204		1706
1205	break;	1707	break;
1206		1708
1207	case 'n':	1709	case 'n':
1208	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))	1710	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
…		…
1214	ERR ("'null' expected");	1716	ERR ("'null' expected");
1215		1717
1216	break;	1718	break;
1217		1719
1218	default:	1720	default:
1219	ERR ("malformed JSON string, neither array, object, number, string or atom");	1721	ERR ("malformed JSON string, neither tag, array, object, number, string or atom");
1220	break;	1722	break;
1221	}	1723	}
1222		1724
1223	fail:	1725	fail:
1224	return 0;	1726	return 0;
1225	}	1727	}
1226		1728
1227	static SV *	1729	static SV *
1228	decode_json (SV *string, JSON *json, UV *offset_return)	1730	decode_json (SV *string, JSON *json, STRLEN *offset_return)
1229	{	1731	{
1230	dec_t dec;	1732	dec_t dec;
1231	UV offset;
1232	SV *sv;	1733	SV *sv;
1233		1734
		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	*/
1234	SvGETMAGIC (string);	1743	/*SvGETMAGIC (string);*/
		1744	if (SvMAGICAL (string) || !SvPOK (string) || SvIsCOW_shared_hash (string))
		1745	string = sv_2mortal (newSVsv (string));
		1746
1235	SvUPGRADE (string, SVt_PV);	1747	SvUPGRADE (string, SVt_PV);
1236		1748
1237	if (json->flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (json->flags))	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)
1238	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",	1767	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
1239	(unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (json->flags));	1768	(unsigned long)SvCUR (string), (unsigned long)json->max_size);
		1769	}
1240		1770
1241	if (json->flags & F_UTF8)	1771	if (DECODE_WANTS_OCTETS (json))
1242	sv_utf8_downgrade (string, 0);	1772	sv_utf8_downgrade (string, 0);
1243	else	1773	else
1244	sv_utf8_upgrade (string);	1774	sv_utf8_upgrade (string);
1245		1775
1246	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1776	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
1247		1777
1248	dec.json = *json;	1778	dec.json = *json;
1249	dec.cur = SvPVX (string);	1779	dec.cur = SvPVX (string);
1250	dec.end = SvEND (string);	1780	dec.end = SvEND (string);
1251	dec.err = 0;	1781	dec.err = 0;
1252	dec.depth = 0;	1782	dec.depth = 0;
1253	dec.maxdepth = DEC_DEPTH (dec.json.flags);
1254		1783
1255	if (dec.json.cb_object || dec.json.cb_sk_object)	1784	if (dec.json.cb_object || dec.json.cb_sk_object)
1256	dec.json.flags |= F_HOOK;	1785	dec.json.flags |= F_HOOK;
1257		1786
1258	*dec.end = 0; // this should basically be a nop, too, but make sure it's there	1787	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
		1788
		1789	decode_ws (&dec);
1259	sv = decode_sv (&dec);	1790	sv = decode_sv (&dec);
1260		1791
1261	if (!(offset_return || !sv))	1792	if (offset_return)
		1793	*offset_return = dec.cur - SvPVX (string);
		1794	else if (sv)
1262	{	1795	{
1263	// check for trailing garbage	1796	// check for trailing garbage
1264	decode_ws (&dec);	1797	decode_ws (&dec);
1265		1798
1266	if (*dec.cur)	1799	if (dec.cur != dec.end)
1267	{	1800	{
1268	dec.err = "garbage after JSON object";	1801	dec.err = "garbage after JSON object";
1269	SvREFCNT_dec (sv);	1802	SvREFCNT_dec (sv);
1270	sv = 0;	1803	sv = 0;
1271	}	1804	}
1272	}
1273
1274	if (offset_return || !sv)
1275	{
1276	offset = dec.json.flags & F_UTF8
1277	? dec.cur - SvPVX (string)
1278	: utf8_distance (dec.cur, SvPVX (string));
1279
1280	if (offset_return)
1281	*offset_return = offset;
1282	}	1805	}
1283		1806
1284	if (!sv)	1807	if (!sv)
1285	{	1808	{
1286	SV *uni = sv_newmortal ();	1809	SV *uni = sv_newmortal ();
…		…
1292	SAVEVPTR (PL_curcop);	1815	SAVEVPTR (PL_curcop);
1293	PL_curcop = &cop;	1816	PL_curcop = &cop;
1294	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);
1295	LEAVE;	1818	LEAVE;
1296		1819
1297	croak ("%s, at character offset %d [\"%s\"]",	1820	croak ("%s, at character offset %d (before \"%s\")",
1298	dec.err,	1821	dec.err,
1299	(int)offset,	1822	(int)ptr_to_index (string, dec.cur),
1300	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1823	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
1301	}	1824	}
1302		1825
1303	sv = sv_2mortal (sv);	1826	sv = sv_2mortal (sv);
1304		1827
1305	if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))	1828	if (!(dec.json.flags & F_ALLOW_NONREF) && json_nonref (sv))
1306	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)");
1307		1830
1308	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	switch (self->incr_mode)
		1848	{
		1849	// reached end of a scalar, see if we are inside a nested structure or not
		1850	end_of_scalar:
		1851	self->incr_mode = INCR_M_JSON;
		1852
		1853	if (self->incr_nest) // end of a scalar inside array, object or tag
		1854	goto incr_m_json;
		1855	else // end of scalar outside structure, json text ends here
		1856	goto interrupt;
		1857
		1858	// only used for initial whitespace skipping
		1859	case INCR_M_WS:
		1860	for (;;)
		1861	{
		1862	if (*p > 0x20)
		1863	{
		1864	if (*p == '#')
		1865	{
		1866	self->incr_mode = INCR_M_C0;
		1867	goto incr_m_c;
		1868	}
		1869	else
		1870	{
		1871	self->incr_mode = INCR_M_JSON;
		1872	goto incr_m_json;
		1873	}
		1874	}
		1875	else if (!*p)
		1876	goto interrupt;
		1877
		1878	++p;
		1879	}
		1880
		1881	// skip a single char inside a string (for \\-processing)
		1882	case INCR_M_BS:
		1883	if (!*p)
		1884	goto interrupt;
		1885
		1886	++p;
		1887	self->incr_mode = INCR_M_STR;
		1888	goto incr_m_str;
		1889
		1890	// inside #-style comments
		1891	case INCR_M_C0:
		1892	case INCR_M_C1:
		1893	incr_m_c:
		1894	for (;;)
		1895	{
		1896	if (*p == '\n')
		1897	{
		1898	self->incr_mode = self->incr_mode == INCR_M_C0 ? INCR_M_WS : INCR_M_JSON;
		1899	break;
		1900	}
		1901	else if (!*p)
		1902	goto interrupt;
		1903
		1904	++p;
		1905	}
		1906
		1907	break;
		1908
		1909	// inside true/false/null
		1910	case INCR_M_TFN:
		1911	incr_m_tfn:
		1912	for (;;)
		1913	switch (*p++)
		1914	{
		1915	case 'r': case 'u': case 'e': // tRUE, falsE, nUll
		1916	case 'a': case 'l': case 's': // fALSe, nuLL
		1917	// allowed
		1918	break;
		1919
		1920	default:
		1921	--p;
		1922	goto end_of_scalar;
		1923	}
		1924
		1925	// inside a number
		1926	case INCR_M_NUM:
		1927	incr_m_num:
		1928	for (;;)
		1929	switch (*p++)
		1930	{
		1931	case 'e': case 'E': case '.': case '+':
		1932	case '-':
		1933	case '0': case '1': case '2': case '3': case '4':
		1934	case '5': case '6': case '7': case '8': case '9':
		1935	// allowed
		1936	break;
		1937
		1938	default:
		1939	--p;
		1940	goto end_of_scalar;
		1941	}
		1942
		1943	// inside a string
		1944	case INCR_M_STR:
		1945	incr_m_str:
		1946	for (;;)
		1947	{
		1948	if (*p == '"')
		1949	{
		1950	++p;
		1951	goto end_of_scalar;
		1952	}
		1953	else if (*p == '\\')
		1954	{
		1955	++p; // "virtually" consumes character after \
		1956
		1957	if (!*p) // if at end of string we have to switch modes
		1958	{
		1959	self->incr_mode = INCR_M_BS;
		1960	goto interrupt;
		1961	}
		1962	}
		1963	else if (!*p)
		1964	goto interrupt;
		1965
		1966	++p;
		1967	}
		1968
		1969	// after initial ws, outside string
		1970	case INCR_M_JSON:
		1971	incr_m_json:
		1972	for (;;)
		1973	{
		1974	switch (*p++)
		1975	{
		1976	case 0:
		1977	--p;
		1978	goto interrupt;
		1979
		1980	case 0x09:
		1981	case 0x0a:
		1982	case 0x0d:
		1983	case 0x20:
		1984	if (!self->incr_nest)
		1985	{
		1986	--p; // do not eat the whitespace, let the next round do it
		1987	goto interrupt;
		1988	}
		1989	break;
		1990
		1991	// the following three blocks handle scalars. this makes the parser
		1992	// more strict than required inside arrays or objects, and could
		1993	// be moved to a special case on the toplevel (except strings)
		1994	case 't':
		1995	case 'f':
		1996	case 'n':
		1997	self->incr_mode = INCR_M_TFN;
		1998	goto incr_m_tfn;
		1999
		2000	case '-':
		2001	case '0': case '1': case '2': case '3': case '4':
		2002	case '5': case '6': case '7': case '8': case '9':
		2003	self->incr_mode = INCR_M_NUM;
		2004	goto incr_m_num;
		2005
		2006	case '"':
		2007	self->incr_mode = INCR_M_STR;
		2008	goto incr_m_str;
		2009
		2010	case '[':
		2011	case '{':
		2012	case '(':
		2013	if (++self->incr_nest > self->max_depth)
		2014	croak (ERR_NESTING_EXCEEDED);
		2015	break;
		2016
		2017	case ']':
		2018	case '}':
		2019	if (--self->incr_nest <= 0)
		2020	goto interrupt;
		2021	break;
		2022
		2023	case ')':
		2024	--self->incr_nest;
		2025	break;
		2026
		2027	case '#':
		2028	self->incr_mode = INCR_M_C1;
		2029	goto incr_m_c;
		2030	}
		2031	}
		2032	}
		2033
		2034	modechange:
		2035	;
		2036	}
		2037
		2038	interrupt:
		2039	self->incr_pos = p - SvPVX (self->incr_text);
		2040	//printf ("interrupt<%.*s>\n", self->incr_pos, SvPVX(self->incr_text));//D
		2041	//printf ("return pos %d mode %d nest %d\n", self->incr_pos, self->incr_mode, self->incr_nest);//D
1309	}	2042	}
1310		2043
1311	/////////////////////////////////////////////////////////////////////////////	2044	/////////////////////////////////////////////////////////////////////////////
1312	// XS interface functions	2045	// XS interface functions
1313		2046
…		…
1322	i >= '0' && i <= '9' ? i - '0'	2055	i >= '0' && i <= '9' ? i - '0'
1323	: i >= 'a' && i <= 'f' ? i - 'a' + 10	2056	: i >= 'a' && i <= 'f' ? i - 'a' + 10
1324	: i >= 'A' && i <= 'F' ? i - 'A' + 10	2057	: i >= 'A' && i <= 'F' ? i - 'A' + 10
1325	: -1;	2058	: -1;
1326		2059
1327	json_stash = gv_stashpv ("JSON::XS" , 1);	2060	json_stash = gv_stashpv ("JSON::XS" , 1);
1328	json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);	2061	bool_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
		2062	bool_false = get_bool ("Types::Serialiser::false");
		2063	bool_true = get_bool ("Types::Serialiser::true");
1329		2064
1330	json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true );	2065	sv_json = newSVpv ("JSON", 0);
1331	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);	2066	SvREADONLY_on (sv_json);
		2067
		2068	CvNODEBUG_on (get_cv ("JSON::XS::incr_text", 0)); /* the debugger completely breaks lvalue subs */
1332	}	2069	}
1333		2070
1334	PROTOTYPES: DISABLE	2071	PROTOTYPES: DISABLE
		2072
		2073	void CLONE (...)
		2074	CODE:
		2075	// as long as these writes are atomic, the race should not matter
		2076	// as existing threads either already use 0, or use the old value,
		2077	// which is sitll correct for the initial thread.
		2078	json_stash = 0;
		2079	bool_stash = 0;
		2080	bool_false = 0;
		2081	bool_true = 0;
1335		2082
1336	void new (char *klass)	2083	void new (char *klass)
1337	PPCODE:	2084	PPCODE:
1338	{	2085	{
1339	SV *pv = NEWSV (0, sizeof (JSON));	2086	SV *pv = NEWSV (0, sizeof (JSON));
1340	SvPOK_only (pv);	2087	SvPOK_only (pv);
1341	Zero (SvPVX (pv), 1, JSON);	2088	json_init ((JSON *)SvPVX (pv));
1342	((JSON *)SvPVX (pv))->flags = F_DEFAULT;	2089	XPUSHs (sv_2mortal (sv_bless (
1343	XPUSHs (sv_2mortal (sv_bless (newRV_noinc (pv), json_stash)));	2090	newRV_noinc (pv),
		2091	strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)
		2092	)));
1344	}	2093	}
		2094
		2095	void boolean_values (JSON *self, SV *v_false = 0, SV *v_true = 0)
		2096	PPCODE:
		2097	self->v_false = newSVsv (v_false);
		2098	self->v_true = newSVsv (v_true);
		2099	XPUSHs (ST (0));
		2100
		2101	void get_boolean_values (JSON *self)
		2102	PPCODE:
		2103	if (self->v_false && self->v_true)
		2104	{
		2105	EXTEND (SP, 2);
		2106	PUSHs (self->v_false);
		2107	PUSHs (self->v_true);
		2108	}
1345		2109
1346	void ascii (JSON *self, int enable = 1)	2110	void ascii (JSON *self, int enable = 1)
1347	ALIAS:	2111	ALIAS:
1348	ascii = F_ASCII	2112	ascii = F_ASCII
1349	latin1 = F_LATIN1	2113	latin1 = F_LATIN1
…		…
1355	pretty = F_PRETTY	2119	pretty = F_PRETTY
1356	allow_nonref = F_ALLOW_NONREF	2120	allow_nonref = F_ALLOW_NONREF
1357	shrink = F_SHRINK	2121	shrink = F_SHRINK
1358	allow_blessed = F_ALLOW_BLESSED	2122	allow_blessed = F_ALLOW_BLESSED
1359	convert_blessed = F_CONV_BLESSED	2123	convert_blessed = F_CONV_BLESSED
		2124	relaxed = F_RELAXED
		2125	allow_unknown = F_ALLOW_UNKNOWN
		2126	allow_tags = F_ALLOW_TAGS
1360	PPCODE:	2127	PPCODE:
1361	{	2128	{
1362	if (enable)	2129	if (enable)
1363	self->flags |= ix;	2130	self->flags |= ix;
1364	else	2131	else
1365	self->flags &= ~ix;	2132	self->flags &= ~ix;
1366		2133
1367	XPUSHs (ST (0));	2134	XPUSHs (ST (0));
1368	}	2135	}
1369		2136
1370	void max_depth (JSON *self, UV max_depth = 0x80000000UL)	2137	void get_ascii (JSON *self)
		2138	ALIAS:
		2139	get_ascii = F_ASCII
		2140	get_latin1 = F_LATIN1
		2141	get_utf8 = F_UTF8
		2142	get_indent = F_INDENT
		2143	get_canonical = F_CANONICAL
		2144	get_space_before = F_SPACE_BEFORE
		2145	get_space_after = F_SPACE_AFTER
		2146	get_allow_nonref = F_ALLOW_NONREF
		2147	get_shrink = F_SHRINK
		2148	get_allow_blessed = F_ALLOW_BLESSED
		2149	get_convert_blessed = F_CONV_BLESSED
		2150	get_relaxed = F_RELAXED
		2151	get_allow_unknown = F_ALLOW_UNKNOWN
		2152	get_allow_tags = F_ALLOW_TAGS
1371	PPCODE:	2153	PPCODE:
1372	{	2154	XPUSHs (boolSV (self->flags & ix));
1373	UV log2 = 0;
1374		2155
1375	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;	2156	void max_depth (JSON *self, U32 max_depth = 0x80000000UL)
1376		2157	PPCODE:
1377	while ((1UL << log2) < max_depth)	2158	self->max_depth = max_depth;
1378	++log2;
1379
1380	self->flags = self->flags & ~F_MAXDEPTH | (log2 << S_MAXDEPTH);
1381
1382	XPUSHs (ST (0));	2159	XPUSHs (ST (0));
1383	}
1384		2160
		2161	U32 get_max_depth (JSON *self)
		2162	CODE:
		2163	RETVAL = self->max_depth;
		2164	OUTPUT:
		2165	RETVAL
		2166
1385	void max_size (JSON *self, UV max_size = 0)	2167	void max_size (JSON *self, U32 max_size = 0)
1386	PPCODE:	2168	PPCODE:
1387	{	2169	self->max_size = max_size;
1388	UV log2 = 0;
1389
1390	if (max_size > 0x80000000UL) max_size = 0x80000000UL;
1391	if (max_size == 1) max_size = 2;
1392
1393	while ((1UL << log2) < max_size)
1394	++log2;
1395
1396	self->flags = self->flags & ~F_MAXSIZE | (log2 << S_MAXSIZE);
1397
1398	XPUSHs (ST (0));	2170	XPUSHs (ST (0));
1399	}	2171
		2172	int get_max_size (JSON *self)
		2173	CODE:
		2174	RETVAL = self->max_size;
		2175	OUTPUT:
		2176	RETVAL
1400		2177
1401	void filter_json_object (JSON *self, SV *cb = &PL_sv_undef)	2178	void filter_json_object (JSON *self, SV *cb = &PL_sv_undef)
1402	PPCODE:	2179	PPCODE:
1403	{	2180	{
1404	SvREFCNT_dec (self->cb_object);	2181	SvREFCNT_dec (self->cb_object);
…		…
1408	}	2185	}
1409		2186
1410	void filter_json_single_key_object (JSON *self, SV *key, SV *cb = &PL_sv_undef)	2187	void filter_json_single_key_object (JSON *self, SV *key, SV *cb = &PL_sv_undef)
1411	PPCODE:	2188	PPCODE:
1412	{	2189	{
1413	if (!self->cb_sk_object)	2190	if (!self->cb_sk_object)
1414	self->cb_sk_object = newHV ();	2191	self->cb_sk_object = newHV ();
1415		2192
1416	if (SvOK (cb))	2193	if (SvOK (cb))
1417	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);	2194	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1418	else	2195	else
…		…
1429	XPUSHs (ST (0));	2206	XPUSHs (ST (0));
1430	}	2207	}
1431		2208
1432	void encode (JSON *self, SV *scalar)	2209	void encode (JSON *self, SV *scalar)
1433	PPCODE:	2210	PPCODE:
1434	XPUSHs (encode_json (scalar, self));	2211	PUTBACK; XPUSHs (encode_json (scalar, self));
1435		2212
1436	void decode (JSON *self, SV *jsonstr)	2213	void decode (JSON *self, SV *jsonstr)
1437	PPCODE:	2214	PPCODE:
1438	XPUSHs (decode_json (jsonstr, self, 0));	2215	PUTBACK; XPUSHs (decode_json (jsonstr, self, 0));
1439		2216
1440	void decode_prefix (JSON *self, SV *jsonstr)	2217	void decode_prefix (JSON *self, SV *jsonstr)
1441	PPCODE:	2218	PPCODE:
1442	{	2219	{
1443	UV offset;	2220	SV *sv;
		2221	STRLEN offset;
		2222	PUTBACK; sv = decode_json (jsonstr, self, &offset);
1444	EXTEND (SP, 2);	2223	EXTEND (SP, 2);
1445	PUSHs (decode_json (jsonstr, self, &offset));	2224	PUSHs (sv);
1446	PUSHs (sv_2mortal (newSVuv (offset)));	2225	PUSHs (sv_2mortal (newSVuv (ptr_to_index (jsonstr, SvPV_nolen (jsonstr) + offset))));
		2226	}
		2227
		2228	void incr_parse (JSON *self, SV *jsonstr = 0)
		2229	PPCODE:
		2230	{
		2231	if (!self->incr_text)
		2232	self->incr_text = newSVpvn ("", 0);
		2233
		2234	/* if utf8-ness doesn't match the decoder, need to upgrade/downgrade */
		2235	if (!DECODE_WANTS_OCTETS (self) == !SvUTF8 (self->incr_text))
		2236	if (DECODE_WANTS_OCTETS (self))
		2237	{
		2238	if (self->incr_pos)
		2239	self->incr_pos = utf8_length ((U8 *)SvPVX (self->incr_text),
		2240	(U8 *)SvPVX (self->incr_text) + self->incr_pos);
		2241
		2242	sv_utf8_downgrade (self->incr_text, 0);
		2243	}
		2244	else
		2245	{
		2246	sv_utf8_upgrade (self->incr_text);
		2247
		2248	if (self->incr_pos)
		2249	self->incr_pos = utf8_hop ((U8 *)SvPVX (self->incr_text), self->incr_pos)
		2250	- (U8 *)SvPVX (self->incr_text);
		2251	}
		2252
		2253	// append data, if any
		2254	if (jsonstr)
		2255	{
		2256	/* make sure both strings have same encoding */
		2257	if (SvUTF8 (jsonstr) != SvUTF8 (self->incr_text))
		2258	if (SvUTF8 (jsonstr))
		2259	sv_utf8_downgrade (jsonstr, 0);
		2260	else
		2261	sv_utf8_upgrade (jsonstr);
		2262
		2263	/* and then just blindly append */
		2264	{
		2265	STRLEN len;
		2266	const char *str = SvPV (jsonstr, len);
		2267	STRLEN cur = SvCUR (self->incr_text);
		2268
		2269	if (SvLEN (self->incr_text) - cur <= len)
		2270	json_sv_grow (self->incr_text, cur, len);
		2271
		2272	Move (str, SvEND (self->incr_text), len, char);
		2273	SvCUR_set (self->incr_text, SvCUR (self->incr_text) + len);
		2274	*SvEND (self->incr_text) = 0; // this should basically be a nop, too, but make sure it's there
		2275	}
		2276	}
		2277
		2278	if (GIMME_V != G_VOID)
		2279	do
		2280	{
		2281	SV *sv;
		2282	STRLEN offset;
		2283
		2284	if (!INCR_DONE (self))
		2285	{
		2286	incr_parse (self);
		2287
		2288	if (self->incr_pos > self->max_size && self->max_size)
		2289	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		2290	(unsigned long)self->incr_pos, (unsigned long)self->max_size);
		2291
		2292	if (!INCR_DONE (self))
		2293	{
		2294	// as an optimisation, do not accumulate white space in the incr buffer
		2295	if (self->incr_mode == INCR_M_WS && self->incr_pos)
		2296	{
		2297	self->incr_pos = 0;
		2298	SvCUR_set (self->incr_text, 0);
		2299	}
		2300
		2301	break;
		2302	}
		2303	}
		2304
		2305	PUTBACK; sv = decode_json (self->incr_text, self, &offset);
		2306	XPUSHs (sv);
		2307
		2308	self->incr_pos -= offset;
		2309	self->incr_nest = 0;
		2310	self->incr_mode = 0;
		2311
		2312	sv_chop (self->incr_text, SvPVX (self->incr_text) + offset);
		2313	}
		2314	while (GIMME_V == G_ARRAY);
		2315	}
		2316
		2317	SV *incr_text (JSON *self)
		2318	ATTRS: lvalue
		2319	CODE:
		2320	{
		2321	if (self->incr_pos)
		2322	croak ("incr_text can not be called when the incremental parser already started parsing");
		2323
		2324	RETVAL = self->incr_text ? SvREFCNT_inc (self->incr_text) : &PL_sv_undef;
		2325	}
		2326	OUTPUT:
		2327	RETVAL
		2328
		2329	void incr_skip (JSON *self)
		2330	CODE:
		2331	{
		2332	if (self->incr_pos)
		2333	{
		2334	sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + self->incr_pos);
		2335	self->incr_pos = 0;
		2336	self->incr_nest = 0;
		2337	self->incr_mode = 0;
		2338	}
		2339	}
		2340
		2341	void incr_reset (JSON *self)
		2342	CODE:
		2343	{
		2344	SvREFCNT_dec (self->incr_text);
		2345	self->incr_text = 0;
		2346	self->incr_pos = 0;
		2347	self->incr_nest = 0;
		2348	self->incr_mode = 0;
1447	}	2349	}
1448		2350
1449	void DESTROY (JSON *self)	2351	void DESTROY (JSON *self)
1450	CODE:	2352	CODE:
		2353	SvREFCNT_dec (self->v_false);
		2354	SvREFCNT_dec (self->v_true);
1451	SvREFCNT_dec (self->cb_sk_object);	2355	SvREFCNT_dec (self->cb_sk_object);
1452	SvREFCNT_dec (self->cb_object);	2356	SvREFCNT_dec (self->cb_object);
		2357	SvREFCNT_dec (self->incr_text);
1453		2358
1454	PROTOTYPES: ENABLE	2359	PROTOTYPES: ENABLE
1455		2360
1456	void to_json (SV *scalar)	2361	void encode_json (SV *scalar)
1457	PPCODE:	2362	PPCODE:
1458	{	2363	{
1459	JSON json = { F_DEFAULT | F_UTF8 };	2364	JSON json;
		2365	json_init (&json);
		2366	json.flags |= F_UTF8;
1460	XPUSHs (encode_json (scalar, &json));	2367	PUTBACK; XPUSHs (encode_json (scalar, &json));
1461	}	2368	}
1462		2369
1463	void from_json (SV *jsonstr)	2370	void decode_json (SV *jsonstr)
1464	PPCODE:	2371	PPCODE:
1465	{	2372	{
1466	JSON json = { F_DEFAULT | F_UTF8 };	2373	JSON json;
		2374	json_init (&json);
		2375	json.flags |= F_UTF8;
1467	XPUSHs (decode_json (jsonstr, &json, 0));	2376	PUTBACK; XPUSHs (decode_json (jsonstr, &json, 0));
1468	}	2377	}
1469		2378

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