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Comparing JSON-XS/XS.xs (file contents):
Revision 1.57 by root, Mon Aug 13 16:05:42 2007 UTC vs.
Revision 1.126 by root, Sun Feb 21 16:18:19 2016 UTC

…		…
4		4
5	#include <assert.h>	5	#include <assert.h>
6	#include <string.h>	6	#include <string.h>
7	#include <stdlib.h>	7	#include <stdlib.h>
8	#include <stdio.h>	8	#include <stdio.h>
		9	#include <limits.h>
9	#include <float.h>	10	#include <float.h>
10		11
11	#if defined(__BORLANDC__) || defined(_MSC_VER)	12	#if defined(__BORLANDC__) || defined(_MSC_VER)
12	# define snprintf _snprintf // C compilers have this in stdio.h	13	# define snprintf _snprintf // C compilers have this in stdio.h
13	#endif	14	#endif
14		15
15	// some old perls do not have this, try to make it work, no	16	// some old perls do not have this, try to make it work, no
16	// guarentees, though. if it breaks, you get to keep the pieces.	17	// guarantees, though. if it breaks, you get to keep the pieces.
17	#ifndef UTF8_MAXBYTES	18	#ifndef UTF8_MAXBYTES
18	# define UTF8_MAXBYTES 13	19	# define UTF8_MAXBYTES 13
19	#endif	20	#endif
		21
		22	// compatibility with perl <5.18
		23	#ifndef HvNAMELEN_get
		24	# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
		25	#endif
		26	#ifndef HvNAMELEN
		27	# define HvNAMELEN(hv) HvNAMELEN_get (hv)
		28	#endif
		29	#ifndef HvNAMEUTF8
		30	# define HvNAMEUTF8(hv) 0
		31	#endif
		32
		33	// three extra for rounding, sign, and end of string
		34	#define IVUV_MAXCHARS (sizeof (UV) * CHAR_BIT * 28 / 93 + 3)
20		35
21	#define F_ASCII 0x00000001UL	36	#define F_ASCII 0x00000001UL
22	#define F_LATIN1 0x00000002UL	37	#define F_LATIN1 0x00000002UL
23	#define F_UTF8 0x00000004UL	38	#define F_UTF8 0x00000004UL
24	#define F_INDENT 0x00000008UL	39	#define F_INDENT 0x00000008UL
…		…
27	#define F_SPACE_AFTER 0x00000040UL	42	#define F_SPACE_AFTER 0x00000040UL
28	#define F_ALLOW_NONREF 0x00000100UL	43	#define F_ALLOW_NONREF 0x00000100UL
29	#define F_SHRINK 0x00000200UL	44	#define F_SHRINK 0x00000200UL
30	#define F_ALLOW_BLESSED 0x00000400UL	45	#define F_ALLOW_BLESSED 0x00000400UL
31	#define F_CONV_BLESSED 0x00000800UL	46	#define F_CONV_BLESSED 0x00000800UL
32	#define F_MAXDEPTH 0xf8000000UL
33	#define S_MAXDEPTH 27
34	#define F_MAXSIZE 0x01f00000UL	47	#define F_RELAXED 0x00001000UL
35	#define S_MAXSIZE 20	48	#define F_ALLOW_UNKNOWN 0x00002000UL
		49	#define F_ALLOW_TAGS 0x00004000UL
36	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing	50	#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
37		51
38	#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
39	#define DEC_SIZE(flags) (1UL << ((flags & F_MAXSIZE ) >> S_MAXSIZE ))
40
41	#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER	52	#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER
42	#define F_DEFAULT (9UL << S_MAXDEPTH)
43		53
44	#define INIT_SIZE 32 // initial scalar size to be allocated	54	#define INIT_SIZE 32 // initial scalar size to be allocated
45	#define INDENT_STEP 3 // spaces per indentation level	55	#define INDENT_STEP 3 // spaces per indentation level
46		56
47	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size	57	#define SHORT_STRING_LEN 16384 // special-case strings of up to this size
48		58
		59	#define DECODE_WANTS_OCTETS(json) ((json)->flags & F_UTF8)
		60
49	#define SB do {	61	#define SB do {
50	#define SE } while (0)	62	#define SE } while (0)
51		63
52	#if __GNUC__ >= 3	64	#if __GNUC__ >= 3
53	# define expect(expr,value) __builtin_expect ((expr),(value))	65	# define expect(expr,value) __builtin_expect ((expr), (value))
54	# define inline inline	66	# define INLINE static inline
55	#else	67	#else
56	# define expect(expr,value) (expr)	68	# define expect(expr,value) (expr)
57	# define inline static	69	# define INLINE static
58	#endif	70	#endif
59		71
60	#define expect_false(expr) expect ((expr) != 0, 0)	72	#define expect_false(expr) expect ((expr) != 0, 0)
61	#define expect_true(expr) expect ((expr) != 0, 1)	73	#define expect_true(expr) expect ((expr) != 0, 1)
62		74
		75	#define IN_RANGE_INC(type,val,beg,end) \
		76	((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
		77	<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
		78
		79	#define ERR_NESTING_EXCEEDED "json text or perl structure exceeds maximum nesting level (max_depth set too low?)"
		80
63	#ifdef USE_ITHREADS	81	#ifdef USE_ITHREADS
64	# define JSON_SLOW 1	82	# define JSON_SLOW 1
		83	# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1))
		84	# define BOOL_STASH (bool_stash ? bool_stash : gv_stashpv ("Types::Serialiser::Boolean", 1))
65	#else	85	#else
66	# define JSON_SLOW 1	86	# define JSON_SLOW 0
		87	# define JSON_STASH json_stash
		88	# define BOOL_STASH bool_stash
67	#endif	89	#endif
68		90
69	static HV *json_stash, *json_boolean_stash; // JSON::XS::	91	// the amount of HEs to allocate on the stack, when sorting keys
70	static SV *json_true, *json_false;	92	#define STACK_HES 64
		93
		94	static HV *json_stash, *bool_stash; // JSON::XS::, Types::Serialiser::Boolean::
		95	static SV *bool_true, *bool_false, *sv_json;
		96
		97	enum {
		98	INCR_M_WS = 0, // initial whitespace skipping, must be 0
		99	INCR_M_STR, // inside string
		100	INCR_M_BS, // inside backslash
		101	INCR_M_C0, // inside comment in initial whitespace sequence
		102	INCR_M_C1, // inside comment in other places
		103	INCR_M_JSON // outside anything, count nesting
		104	};
		105
		106	#define INCR_DONE(json) ((json)->incr_nest <= 0 && (json)->incr_mode == INCR_M_JSON)
71		107
72	typedef struct {	108	typedef struct {
73	U32 flags;	109	U32 flags;
		110	U32 max_depth;
		111	STRLEN max_size;
		112
74	SV *cb_object;	113	SV *cb_object;
75	HV *cb_sk_object;	114	HV *cb_sk_object;
		115
		116	// for the incremental parser
		117	SV *incr_text; // the source text so far
		118	STRLEN incr_pos; // the current offset into the text
		119	int incr_nest; // {[]}-nesting level
		120	unsigned char incr_mode;
76	} JSON;	121	} JSON;
		122
		123	INLINE void
		124	json_init (JSON *json)
		125	{
		126	Zero (json, 1, JSON);
		127	json->max_depth = 512;
		128	}
77		129
78	/////////////////////////////////////////////////////////////////////////////	130	/////////////////////////////////////////////////////////////////////////////
79	// utility functions	131	// utility functions
80		132
81	inline void	133	INLINE SV *
		134	get_bool (const char *name)
		135	{
		136	SV *sv = get_sv (name, 1);
		137
		138	SvREADONLY_on (sv);
		139	SvREADONLY_on (SvRV (sv));
		140
		141	return sv;
		142	}
		143
		144	INLINE void
82	shrink (SV *sv)	145	shrink (SV *sv)
83	{	146	{
84	sv_utf8_downgrade (sv, 1);	147	sv_utf8_downgrade (sv, 1);
		148
85	if (SvLEN (sv) > SvCUR (sv) + 1)	149	if (SvLEN (sv) > SvCUR (sv) + 1)
86	{	150	{
87	#ifdef SvPV_shrink_to_cur	151	#ifdef SvPV_shrink_to_cur
88	SvPV_shrink_to_cur (sv);	152	SvPV_shrink_to_cur (sv);
89	#elif defined (SvPV_renew)	153	#elif defined (SvPV_renew)
…		…
95	// decode an utf-8 character and return it, or (UV)-1 in	159	// decode an utf-8 character and return it, or (UV)-1 in
96	// case of an error.	160	// case of an error.
97	// we special-case "safe" characters from U+80 .. U+7FF,	161	// we special-case "safe" characters from U+80 .. U+7FF,
98	// but use the very good perl function to parse anything else.	162	// but use the very good perl function to parse anything else.
99	// note that we never call this function for a ascii codepoints	163	// note that we never call this function for a ascii codepoints
100	inline UV	164	INLINE UV
101	decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)	165	decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)
102	{	166	{
103	if (expect_false (s[0] > 0xdf || s[0] < 0xc2))	167	if (expect_true (len >= 2
104	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);	168	&& IN_RANGE_INC (char, s[0], 0xc2, 0xdf)
105	else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf)	169	&& IN_RANGE_INC (char, s[1], 0x80, 0xbf)))
106	{	170	{
107	*clen = 2;	171	*clen = 2;
108	return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);	172	return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);
109	}	173	}
110	else	174	else
111	{	175	return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);
112	*clen = (STRLEN)-1;	176	}
113	return (UV)-1;	177
		178	// likewise for encoding, also never called for ascii codepoints
		179	// this function takes advantage of this fact, although current gccs
		180	// seem to optimise the check for >= 0x80 away anyways
		181	INLINE unsigned char *
		182	encode_utf8 (unsigned char *s, UV ch)
		183	{
		184	if (expect_false (ch < 0x000080))
		185	*s++ = ch;
		186	else if (expect_true (ch < 0x000800))
		187	*s++ = 0xc0 | ( ch >> 6),
		188	*s++ = 0x80 | ( ch & 0x3f);
		189	else if ( ch < 0x010000)
		190	*s++ = 0xe0 | ( ch >> 12),
		191	*s++ = 0x80 | ((ch >> 6) & 0x3f),
		192	*s++ = 0x80 | ( ch & 0x3f);
		193	else if ( ch < 0x110000)
		194	*s++ = 0xf0 | ( ch >> 18),
		195	*s++ = 0x80 | ((ch >> 12) & 0x3f),
		196	*s++ = 0x80 | ((ch >> 6) & 0x3f),
		197	*s++ = 0x80 | ( ch & 0x3f);
		198
		199	return s;
		200	}
		201
		202	// convert offset pointer to character index, sv must be string
		203	static STRLEN
		204	ptr_to_index (SV *sv, char *offset)
		205	{
		206	return SvUTF8 (sv)
		207	? utf8_distance (offset, SvPVX (sv))
		208	: offset - SvPVX (sv);
		209	}
		210
		211	/////////////////////////////////////////////////////////////////////////////
		212	// fp hell
		213
		214	// scan a group of digits, and a trailing exponent
		215	static void
		216	json_atof_scan1 (const char *s, NV *accum, int *expo, int postdp, int maxdepth)
		217	{
		218	UV uaccum = 0;
		219	int eaccum = 0;
		220
		221	// if we recurse too deep, skip all remaining digits
		222	// to avoid a stack overflow attack
		223	if (expect_false (--maxdepth <= 0))
		224	while (((U8)*s - '0') < 10)
		225	++s;
		226
		227	for (;;)
114	}	228	{
		229	U8 dig = (U8)*s - '0';
		230
		231	if (expect_false (dig >= 10))
		232	{
		233	if (dig == (U8)((U8)'.' - (U8)'0'))
		234	{
		235	++s;
		236	json_atof_scan1 (s, accum, expo, 1, maxdepth);
		237	}
		238	else if ((dig | ' ') == 'e' - '0')
		239	{
		240	int exp2 = 0;
		241	int neg = 0;
		242
		243	++s;
		244
		245	if (*s == '-')
		246	{
		247	++s;
		248	neg = 1;
		249	}
		250	else if (*s == '+')
		251	++s;
		252
		253	while ((dig = (U8)*s - '0') < 10)
		254	exp2 = exp2 * 10 + *s++ - '0';
		255
		256	*expo += neg ? -exp2 : exp2;
		257	}
		258
		259	break;
		260	}
		261
		262	++s;
		263
		264	uaccum = uaccum * 10 + dig;
		265	++eaccum;
		266
		267	// if we have too many digits, then recurse for more
		268	// we actually do this for rather few digits
		269	if (uaccum >= (UV_MAX - 9) / 10)
		270	{
		271	if (postdp) *expo -= eaccum;
		272	json_atof_scan1 (s, accum, expo, postdp, maxdepth);
		273	if (postdp) *expo += eaccum;
		274
		275	break;
		276	}
		277	}
		278
		279	// this relies greatly on the quality of the pow ()
		280	// implementation of the platform, but a good
		281	// implementation is hard to beat.
		282	// (IEEE 754 conformant ones are required to be exact)
		283	if (postdp) *expo -= eaccum;
		284	*accum += uaccum * Perl_pow (10., *expo);
		285	*expo += eaccum;
		286	}
		287
		288	static NV
		289	json_atof (const char *s)
		290	{
		291	NV accum = 0.;
		292	int expo = 0;
		293	int neg = 0;
		294
		295	if (*s == '-')
		296	{
		297	++s;
		298	neg = 1;
		299	}
		300
		301	// a recursion depth of ten gives us >>500 bits
		302	json_atof_scan1 (s, &accum, &expo, 0, 10);
		303
		304	return neg ? -accum : accum;
		305	}
		306
		307	// target of scalar reference is bool? -1 == nope, 0 == false, 1 == true
		308	static int
		309	ref_bool_type (SV *sv)
		310	{
		311	svtype svt = SvTYPE (sv);
		312
		313	if (svt < SVt_PVAV)
		314	{
		315	STRLEN len = 0;
		316	char *pv = svt ? SvPV (sv, len) : 0;
		317
		318	if (len == 1)
		319	if (*pv == '1')
		320	return 1;
		321	else if (*pv == '0')
		322	return 0;
		323
		324	}
		325
		326	return -1;
		327	}
		328
		329	// returns whether scalar is not a reference in the sense of allow_nonref
		330	static int
		331	json_nonref (SV *scalar)
		332	{
		333	if (!SvROK (scalar))
		334	return 1;
		335
		336	scalar = SvRV (scalar);
		337
		338	if (SvSTASH (scalar) == bool_stash)
		339	return 1;
		340
		341	if (!SvOBJECT (scalar) && ref_bool_type (scalar) >= 0)
		342	return 1;
		343
		344	return 0;
115	}	345	}
116		346
117	/////////////////////////////////////////////////////////////////////////////	347	/////////////////////////////////////////////////////////////////////////////
118	// encoder	348	// encoder
119		349
…		…
123	char *cur; // SvPVX (sv) + current output position	353	char *cur; // SvPVX (sv) + current output position
124	char *end; // SvEND (sv)	354	char *end; // SvEND (sv)
125	SV *sv; // result scalar	355	SV *sv; // result scalar
126	JSON json;	356	JSON json;
127	U32 indent; // indentation level	357	U32 indent; // indentation level
128	U32 maxdepth; // max. indentation/recursion level	358	UV limit; // escape character values >= this value when encoding
129	} enc_t;	359	} enc_t;
130		360
131	inline void	361	INLINE void
132	need (enc_t *enc, STRLEN len)	362	need (enc_t *enc, STRLEN len)
133	{	363	{
134	if (expect_false (enc->cur + len >= enc->end))	364	if (expect_false (enc->cur + len >= enc->end))
135	{	365	{
136	STRLEN cur = enc->cur - SvPVX (enc->sv);	366	STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
137	SvGROW (enc->sv, cur + len + 1);	367	SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
138	enc->cur = SvPVX (enc->sv) + cur;	368	enc->cur = SvPVX (enc->sv) + cur;
139	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;	369	enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
140	}	370	}
141	}	371	}
142		372
143	inline void	373	INLINE void
144	encode_ch (enc_t *enc, char ch)	374	encode_ch (enc_t *enc, char ch)
145	{	375	{
146	need (enc, 1);	376	need (enc, 1);
147	*enc->cur++ = ch;	377	*enc->cur++ = ch;
148	}	378	}
…		…
202	{	432	{
203	uch = ch;	433	uch = ch;
204	clen = 1;	434	clen = 1;
205	}	435	}
206		436
207	if (uch > 0x10FFFFUL)	437	if (uch < 0x80/*0x20*/ || uch >= enc->limit)
208	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
209
210	if (uch < 0x80 || enc->json.flags & F_ASCII || (enc->json.flags & F_LATIN1 && uch > 0xFF))
211	{	438	{
212	if (uch > 0xFFFFUL)	439	if (uch >= 0x10000UL)
213	{	440	{
		441	if (uch >= 0x110000UL)
		442	croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
		443
214	need (enc, len += 11);	444	need (enc, len += 11);
215	sprintf (enc->cur, "\\u%04x\\u%04x",	445	sprintf (enc->cur, "\\u%04x\\u%04x",
216	(int)((uch - 0x10000) / 0x400 + 0xD800),	446	(int)((uch - 0x10000) / 0x400 + 0xD800),
217	(int)((uch - 0x10000) % 0x400 + 0xDC00));	447	(int)((uch - 0x10000) % 0x400 + 0xDC00));
218	enc->cur += 12;	448	enc->cur += 12;
219	}	449	}
220	else	450	else
221	{	451	{
222	static char hexdigit [16] = "0123456789abcdef";
223	need (enc, len += 5);	452	need (enc, len += 5);
224	*enc->cur++ = '\\';	453	*enc->cur++ = '\\';
225	*enc->cur++ = 'u';	454	*enc->cur++ = 'u';
226	*enc->cur++ = hexdigit [ uch >> 12 ];	455	*enc->cur++ = PL_hexdigit [ uch >> 12 ];
227	*enc->cur++ = hexdigit [(uch >> 8) & 15];	456	*enc->cur++ = PL_hexdigit [(uch >> 8) & 15];
228	*enc->cur++ = hexdigit [(uch >> 4) & 15];	457	*enc->cur++ = PL_hexdigit [(uch >> 4) & 15];
229	*enc->cur++ = hexdigit [(uch >> 0) & 15];	458	*enc->cur++ = PL_hexdigit [(uch >> 0) & 15];
230	}	459	}
231		460
232	str += clen;	461	str += clen;
233	}	462	}
234	else if (enc->json.flags & F_LATIN1)	463	else if (enc->json.flags & F_LATIN1)
…		…
246	while (--clen);	475	while (--clen);
247	}	476	}
248	else	477	else
249	{	478	{
250	need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed	479	need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed
251	enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0);	480	enc->cur = encode_utf8 (enc->cur, uch);
252	++str;	481	++str;
253	}	482	}
254	}	483	}
255	}	484	}
256	}	485	}
257		486
258	--len;	487	--len;
259	}	488	}
260	}	489	}
261		490
262	inline void	491	INLINE void
263	encode_indent (enc_t *enc)	492	encode_indent (enc_t *enc)
264	{	493	{
265	if (enc->json.flags & F_INDENT)	494	if (enc->json.flags & F_INDENT)
266	{	495	{
267	int spaces = enc->indent * INDENT_STEP;	496	int spaces = enc->indent * INDENT_STEP;
…		…
270	memset (enc->cur, ' ', spaces);	499	memset (enc->cur, ' ', spaces);
271	enc->cur += spaces;	500	enc->cur += spaces;
272	}	501	}
273	}	502	}
274		503
275	inline void	504	INLINE void
276	encode_space (enc_t *enc)	505	encode_space (enc_t *enc)
277	{	506	{
278	need (enc, 1);	507	need (enc, 1);
279	encode_ch (enc, ' ');	508	encode_ch (enc, ' ');
280	}	509	}
281		510
282	inline void	511	INLINE void
283	encode_nl (enc_t *enc)	512	encode_nl (enc_t *enc)
284	{	513	{
285	if (enc->json.flags & F_INDENT)	514	if (enc->json.flags & F_INDENT)
286	{	515	{
287	need (enc, 1);	516	need (enc, 1);
288	encode_ch (enc, '\n');	517	encode_ch (enc, '\n');
289	}	518	}
290	}	519	}
291		520
292	inline void	521	INLINE void
293	encode_comma (enc_t *enc)	522	encode_comma (enc_t *enc)
294	{	523	{
295	encode_ch (enc, ',');	524	encode_ch (enc, ',');
296		525
297	if (enc->json.flags & F_INDENT)	526	if (enc->json.flags & F_INDENT)
…		…
305	static void	534	static void
306	encode_av (enc_t *enc, AV *av)	535	encode_av (enc_t *enc, AV *av)
307	{	536	{
308	int i, len = av_len (av);	537	int i, len = av_len (av);
309		538
310	if (enc->indent >= enc->maxdepth)	539	if (enc->indent >= enc->json.max_depth)
311	croak ("data structure too deep (hit recursion limit)");	540	croak (ERR_NESTING_EXCEEDED);
312		541
313	encode_ch (enc, '['); encode_nl (enc);	542	encode_ch (enc, '[');
314	++enc->indent;
315		543
		544	if (len >= 0)
		545	{
		546	encode_nl (enc); ++enc->indent;
		547
316	for (i = 0; i <= len; ++i)	548	for (i = 0; i <= len; ++i)
317	{	549	{
318	SV **svp = av_fetch (av, i, 0);	550	SV **svp = av_fetch (av, i, 0);
319		551
320	encode_indent (enc);	552	encode_indent (enc);
321		553
322	if (svp)	554	if (svp)
323	encode_sv (enc, *svp);	555	encode_sv (enc, *svp);
324	else	556	else
325	encode_str (enc, "null", 4, 0);	557	encode_str (enc, "null", 4, 0);
326		558
327	if (i < len)	559	if (i < len)
328	encode_comma (enc);	560	encode_comma (enc);
329	}	561	}
330		562
		563	encode_nl (enc); --enc->indent; encode_indent (enc);
		564	}
		565
331	encode_nl (enc);	566	encode_ch (enc, ']');
332
333	--enc->indent;
334	encode_indent (enc); encode_ch (enc, ']');
335	}	567	}
336		568
337	static void	569	static void
338	encode_he (enc_t *enc, HE *he)	570	encode_hk (enc_t *enc, HE *he)
339	{	571	{
340	encode_ch (enc, '"');	572	encode_ch (enc, '"');
341		573
342	if (HeKLEN (he) == HEf_SVKEY)	574	if (HeKLEN (he) == HEf_SVKEY)
343	{	575	{
344	SV *sv = HeSVKEY (he);	576	SV *sv = HeSVKEY (he);
345	STRLEN len;	577	STRLEN len;
346	char *str;	578	char *str;
347		579
348	SvGETMAGIC (sv);	580	SvGETMAGIC (sv);
349	str = SvPV (sv, len);	581	str = SvPV (sv, len);
350		582
351	encode_str (enc, str, len, SvUTF8 (sv));	583	encode_str (enc, str, len, SvUTF8 (sv));
352	}	584	}
…		…
356	encode_ch (enc, '"');	588	encode_ch (enc, '"');
357		589
358	if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);	590	if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);
359	encode_ch (enc, ':');	591	encode_ch (enc, ':');
360	if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);	592	if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);
361	encode_sv (enc, HeVAL (he));
362	}	593	}
363		594
364	// compare hash entries, used when all keys are bytestrings	595	// compare hash entries, used when all keys are bytestrings
365	static int	596	static int
366	he_cmp_fast (const void *a_, const void *b_)	597	he_cmp_fast (const void *a_, const void *b_)
…		…
371	HE *b = *(HE **)b_;	602	HE *b = *(HE **)b_;
372		603
373	STRLEN la = HeKLEN (a);	604	STRLEN la = HeKLEN (a);
374	STRLEN lb = HeKLEN (b);	605	STRLEN lb = HeKLEN (b);
375		606
376	if (!(cmp = memcmp (HeKEY (a), HeKEY (b), la < lb ? la : lb)))	607	if (!(cmp = memcmp (HeKEY (b), HeKEY (a), lb < la ? lb : la)))
377	cmp = la - lb;	608	cmp = lb - la;
378		609
379	return cmp;	610	return cmp;
380	}	611	}
381		612
382	// compare hash entries, used when some keys are sv's or utf-x	613	// compare hash entries, used when some keys are sv's or utf-x
383	static int	614	static int
384	he_cmp_slow (const void *a, const void *b)	615	he_cmp_slow (const void *a, const void *b)
385	{	616	{
386	return sv_cmp (HeSVKEY_force (*(HE **)a), HeSVKEY_force (*(HE **)b));	617	return sv_cmp (HeSVKEY_force (*(HE **)b), HeSVKEY_force (*(HE **)a));
387	}	618	}
388		619
389	static void	620	static void
390	encode_hv (enc_t *enc, HV *hv)	621	encode_hv (enc_t *enc, HV *hv)
391	{	622	{
392	int count, i;	623	HE *he;
393		624
394	if (enc->indent >= enc->maxdepth)	625	if (enc->indent >= enc->json.max_depth)
395	croak ("data structure too deep (hit recursion limit)");	626	croak (ERR_NESTING_EXCEEDED);
396		627
397	encode_ch (enc, '{'); encode_nl (enc); ++enc->indent;	628	encode_ch (enc, '{');
398		629
399	if ((count = hv_iterinit (hv)))
400	{
401	// for canonical output we have to sort by keys first	630	// for canonical output we have to sort by keys first
402	// actually, this is mostly due to the stupid so-called	631	// actually, this is mostly due to the stupid so-called
403	// security workaround added somewhere in 5.8.x.	632	// security workaround added somewhere in 5.8.x
404	// that randomises hash orderings	633	// that randomises hash orderings
405	if (enc->json.flags & F_CANONICAL)	634	if (enc->json.flags & F_CANONICAL && !SvRMAGICAL (hv))
		635	{
		636	int count = hv_iterinit (hv);
		637
		638	if (SvMAGICAL (hv))
406	{	639	{
		640	// need to count by iterating. could improve by dynamically building the vector below
		641	// but I don't care for the speed of this special case.
		642	// note also that we will run into undefined behaviour when the two iterations
		643	// do not result in the same count, something I might care for in some later release.
		644
		645	count = 0;
		646	while (hv_iternext (hv))
		647	++count;
		648
		649	hv_iterinit (hv);
		650	}
		651
		652	if (count)
		653	{
407	int fast = 1;	654	int i, fast = 1;
408	HE *he;	655	HE *hes_stack [STACK_HES];
409	#if defined(__BORLANDC__) || defined(_MSC_VER)	656	HE **hes = hes_stack;
410	HE **hes = _alloca (count * sizeof (HE));	657
411	#else	658	// allocate larger arrays on the heap
412	HE *hes [count]; // if your compiler dies here, you need to enable C99 mode	659	if (count > STACK_HES)
413	#endif	660	{
		661	SV *sv = sv_2mortal (NEWSV (0, count * sizeof (*hes)));
		662	hes = (HE **)SvPVX (sv);
		663	}
414		664
415	i = 0;	665	i = 0;
416	while ((he = hv_iternext (hv)))	666	while ((he = hv_iternext (hv)))
417	{	667	{
418	hes [i++] = he;	668	hes [i++] = he;
…		…
440		690
441	FREETMPS;	691	FREETMPS;
442	LEAVE;	692	LEAVE;
443	}	693	}
444		694
445	for (i = 0; i < count; ++i)	695	encode_nl (enc); ++enc->indent;
		696
		697	while (count--)
446	{	698	{
447	encode_indent (enc);	699	encode_indent (enc);
		700	he = hes [count];
448	encode_he (enc, hes [i]);	701	encode_hk (enc, he);
		702	encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
449		703
450	if (i < count - 1)	704	if (count)
451	encode_comma (enc);	705	encode_comma (enc);
452	}	706	}
453		707
454	encode_nl (enc);	708	encode_nl (enc); --enc->indent; encode_indent (enc);
455	}	709	}
		710	}
456	else	711	else
		712	{
		713	if (hv_iterinit (hv) || SvMAGICAL (hv))
		714	if ((he = hv_iternext (hv)))
457	{	715	{
458	HE *he = hv_iternext (hv);	716	encode_nl (enc); ++enc->indent;
459		717
460	for (;;)	718	for (;;)
461	{	719	{
462	encode_indent (enc);	720	encode_indent (enc);
463	encode_he (enc, he);	721	encode_hk (enc, he);
		722	encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
464		723
465	if (!(he = hv_iternext (hv)))	724	if (!(he = hv_iternext (hv)))
466	break;	725	break;
467		726
468	encode_comma (enc);	727	encode_comma (enc);
469	}	728	}
470		729
471	encode_nl (enc);	730	encode_nl (enc); --enc->indent; encode_indent (enc);
472	}	731	}
473	}	732	}
474		733
475	--enc->indent; encode_indent (enc); encode_ch (enc, '}');	734	encode_ch (enc, '}');
476	}	735	}
477		736
478	// encode objects, arrays and special \0=false and \1=true values.	737	// encode objects, arrays and special \0=false and \1=true values.
479	static void	738	static void
480	encode_rv (enc_t *enc, SV *sv)	739	encode_rv (enc_t *enc, SV *sv)
481	{	740	{
482	svtype svt;	741	svtype svt;
		742	GV *method;
483		743
484	SvGETMAGIC (sv);	744	SvGETMAGIC (sv);
485	svt = SvTYPE (sv);	745	svt = SvTYPE (sv);
486		746
487	if (expect_false (SvOBJECT (sv)))	747	if (expect_false (SvOBJECT (sv)))
488	{	748	{
489	HV *stash = !JSON_SLOW || json_boolean_stash	749	HV *stash = SvSTASH (sv);
490	? json_boolean_stash
491	: gv_stashpv ("JSON::XS::Boolean", 1);
492		750
493	if (SvSTASH (sv) == stash)	751	if (stash == bool_stash)
494	{	752	{
495	if (SvIV (sv))	753	if (SvIV (sv))
496	encode_str (enc, "true", 4, 0);	754	encode_str (enc, "true", 4, 0);
497	else	755	else
498	encode_str (enc, "false", 5, 0);	756	encode_str (enc, "false", 5, 0);
499	}	757	}
		758	else if ((enc->json.flags & F_ALLOW_TAGS) && (method = gv_fetchmethod_autoload (stash, "FREEZE", 0)))
		759	{
		760	int count;
		761	dSP;
		762
		763	ENTER; SAVETMPS;
		764	SAVESTACK_POS ();
		765	PUSHMARK (SP);
		766	EXTEND (SP, 2);
		767	// we re-bless the reference to get overload and other niceties right
		768	PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		769	PUSHs (sv_json);
		770
		771	PUTBACK;
		772	count = call_sv ((SV *)GvCV (method), G_ARRAY);
		773	SPAGAIN;
		774
		775	// catch this surprisingly common error
		776	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		777	croak ("%s::FREEZE method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		778
		779	encode_ch (enc, '(');
		780	encode_ch (enc, '"');
		781	encode_str (enc, HvNAME (stash), HvNAMELEN (stash), HvNAMEUTF8 (stash));
		782	encode_ch (enc, '"');
		783	encode_ch (enc, ')');
		784	encode_ch (enc, '[');
		785
		786	while (count)
		787	{
		788	encode_sv (enc, SP[1 - count--]);
		789
		790	if (count)
		791	encode_ch (enc, ',');
		792	}
		793
		794	encode_ch (enc, ']');
		795
		796	FREETMPS; LEAVE;
		797	}
		798	else if ((enc->json.flags & F_CONV_BLESSED) && (method = gv_fetchmethod_autoload (stash, "TO_JSON", 0)))
		799	{
		800	dSP;
		801
		802	ENTER; SAVETMPS;
		803	PUSHMARK (SP);
		804	// we re-bless the reference to get overload and other niceties right
		805	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
		806
		807	// calling with G_SCALAR ensures that we always get a 1 return value
		808	PUTBACK;
		809	call_sv ((SV *)GvCV (method), G_SCALAR);
		810	SPAGAIN;
		811
		812	// catch this surprisingly common error
		813	if (SvROK (TOPs) && SvRV (TOPs) == sv)
		814	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
		815
		816	sv = POPs;
		817	PUTBACK;
		818
		819	encode_sv (enc, sv);
		820
		821	FREETMPS; LEAVE;
		822	}
		823	else if (enc->json.flags & F_ALLOW_BLESSED)
		824	encode_str (enc, "null", 4, 0);
500	else	825	else
501	{
502	#if 0
503	if (0 && sv_derived_from (rv, "JSON::Literal"))
504	{
505	// not yet
506	}
507	#endif
508	if (enc->json.flags & F_CONV_BLESSED)
509	{
510	// we re-bless the reference to get overload and other niceties right
511	GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 0);
512
513	if (to_json)
514	{
515	int count;
516	dSP;
517
518	ENTER; SAVETMPS; PUSHMARK (SP);
519	XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
520
521	// calling with G_SCALAR ensures that we always get a 1 return value
522	PUTBACK;
523	call_sv ((SV *)GvCV (to_json), G_SCALAR);
524	SPAGAIN;
525
526	// catch this surprisingly common error
527	if (SvROK (TOPs) && SvRV (TOPs) == sv)
528	croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
529
530	sv = POPs;
531	PUTBACK;
532
533	encode_sv (enc, sv);
534
535	FREETMPS; LEAVE;
536	}
537	else if (enc->json.flags & F_ALLOW_BLESSED)
538	encode_str (enc, "null", 4, 0);
539	else
540	croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
541	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
542	}
543	else if (enc->json.flags & F_ALLOW_BLESSED)
544	encode_str (enc, "null", 4, 0);
545	else
546	croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",	826	croak ("encountered object '%s', but neither allow_blessed, convert_blessed nor allow_tags settings are enabled (or TO_JSON/FREEZE method missing)",
547	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	827	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
548	}
549	}	828	}
550	else if (svt == SVt_PVHV)	829	else if (svt == SVt_PVHV)
551	encode_hv (enc, (HV *)sv);	830	encode_hv (enc, (HV *)sv);
552	else if (svt == SVt_PVAV)	831	else if (svt == SVt_PVAV)
553	encode_av (enc, (AV *)sv);	832	encode_av (enc, (AV *)sv);
554	else if (svt < SVt_PVAV)	833	else if (svt < SVt_PVAV)
555	{	834	{
556	STRLEN len = 0;	835	int bool_type = ref_bool_type (sv);
557	char *pv = svt ? SvPV (sv, len) : 0;
558		836
559	if (len == 1 && *pv == '1')	837	if (bool_type == 1)
560	encode_str (enc, "true", 4, 0);	838	encode_str (enc, "true", 4, 0);
561	else if (len == 1 && *pv == '0')	839	else if (bool_type == 0)
562	encode_str (enc, "false", 5, 0);	840	encode_str (enc, "false", 5, 0);
		841	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		842	encode_str (enc, "null", 4, 0);
563	else	843	else
564	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",	844	croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
565	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	845	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
566	}	846	}
		847	else if (enc->json.flags & F_ALLOW_UNKNOWN)
		848	encode_str (enc, "null", 4, 0);
567	else	849	else
568	croak ("encountered %s, but JSON can only represent references to arrays or hashes",	850	croak ("encountered %s, but JSON can only represent references to arrays or hashes",
569	SvPV_nolen (sv_2mortal (newRV_inc (sv))));	851	SvPV_nolen (sv_2mortal (newRV_inc (sv))));
570	}	852	}
571		853
…		…
589	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);	871	Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
590	enc->cur += strlen (enc->cur);	872	enc->cur += strlen (enc->cur);
591	}	873	}
592	else if (SvIOKp (sv))	874	else if (SvIOKp (sv))
593	{	875	{
594	// we assume we can always read an IV as a UV	876	// we assume we can always read an IV as a UV and vice versa
595	if (SvUV (sv) & ~(UV)0x7fff)	877	// we assume two's complement
596	{	878	// we assume no aliasing issues in the union
597	// large integer, use the (rather slow) snprintf way.	879	if (SvIsUV (sv) ? SvUVX (sv) <= 59000
598	need (enc, sizeof (UV) * 3);	880	: SvIVX (sv) <= 59000 && SvIVX (sv) >= -59000)
599	enc->cur +=
600	SvIsUV(sv)
601	? snprintf (enc->cur, sizeof (UV) * 3, "%"UVuf, (UV)SvUVX (sv))
602	: snprintf (enc->cur, sizeof (UV) * 3, "%"IVdf, (IV)SvIVX (sv));
603	}
604	else
605	{	881	{
606	// optimise the "small number case"	882	// optimise the "small number case"
607	// code will likely be branchless and use only a single multiplication	883	// code will likely be branchless and use only a single multiplication
		884	// works for numbers up to 59074
608	I32 i = SvIV (sv);	885	I32 i = SvIVX (sv);
609	U32 u;	886	U32 u;
610	char digit, nz = 0;	887	char digit, nz = 0;
611		888
612	need (enc, 6);	889	need (enc, 6);
613		890
…		…
619		896
620	// now output digit by digit, each time masking out the integer part	897	// now output digit by digit, each time masking out the integer part
621	// and multiplying by 5 while moving the decimal point one to the right,	898	// and multiplying by 5 while moving the decimal point one to the right,
622	// resulting in a net multiplication by 10.	899	// resulting in a net multiplication by 10.
623	// we always write the digit to memory but conditionally increment	900	// we always write the digit to memory but conditionally increment
624	// the pointer, to ease the usage of conditional move instructions.	901	// the pointer, to enable the use of conditional move instructions.
625	digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffff) * 5;	902	digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffffUL) * 5;
626	digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffff) * 5;	903	digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffffUL) * 5;
627	digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffff) * 5;	904	digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffffUL) * 5;
628	digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffff) * 5;	905	digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffffUL) * 5;
629	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'	906	digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
630	}	907	}
		908	else
		909	{
		910	// large integer, use the (rather slow) snprintf way.
		911	need (enc, IVUV_MAXCHARS);
		912	enc->cur +=
		913	SvIsUV(sv)
		914	? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv))
		915	: snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv));
		916	}
631	}	917	}
632	else if (SvROK (sv))	918	else if (SvROK (sv))
633	encode_rv (enc, SvRV (sv));	919	encode_rv (enc, SvRV (sv));
634	else if (!SvOK (sv))	920	else if (!SvOK (sv) || enc->json.flags & F_ALLOW_UNKNOWN)
635	encode_str (enc, "null", 4, 0);	921	encode_str (enc, "null", 4, 0);
636	else	922	else
637	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",	923	croak ("encountered perl type (%s,0x%x) that JSON cannot handle, check your input data",
638	SvPV_nolen (sv), SvFLAGS (sv));	924	SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
639	}	925	}
640		926
641	static SV *	927	static SV *
642	encode_json (SV *scalar, JSON *json)	928	encode_json (SV *scalar, JSON *json)
643	{	929	{
644	enc_t enc;	930	enc_t enc;
645		931
646	if (!(json->flags & F_ALLOW_NONREF) && !SvROK (scalar))	932	if (!(json->flags & F_ALLOW_NONREF) && json_nonref (scalar))
647	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");	933	croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
648		934
649	enc.json = *json;	935	enc.json = *json;
650	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));	936	enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
651	enc.cur = SvPVX (enc.sv);	937	enc.cur = SvPVX (enc.sv);
652	enc.end = SvEND (enc.sv);	938	enc.end = SvEND (enc.sv);
653	enc.indent = 0;	939	enc.indent = 0;
654	enc.maxdepth = DEC_DEPTH (enc.json.flags);	940	enc.limit = enc.json.flags & F_ASCII ? 0x000080UL
		941	: enc.json.flags & F_LATIN1 ? 0x000100UL
		942	: 0x110000UL;
655		943
656	SvPOK_only (enc.sv);	944	SvPOK_only (enc.sv);
657	encode_sv (&enc, scalar);	945	encode_sv (&enc, scalar);
		946	encode_nl (&enc);
658		947
659	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));	948	SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
660	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings	949	*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
661		950
662	if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8)))	951	if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8)))
…		…
680	JSON json;	969	JSON json;
681	U32 depth; // recursion depth	970	U32 depth; // recursion depth
682	U32 maxdepth; // recursion depth limit	971	U32 maxdepth; // recursion depth limit
683	} dec_t;	972	} dec_t;
684		973
685	inline void	974	INLINE void
		975	decode_comment (dec_t *dec)
		976	{
		977	// only '#'-style comments allowed a.t.m.
		978
		979	while (*dec->cur && *dec->cur != 0x0a && *dec->cur != 0x0d)
		980	++dec->cur;
		981	}
		982
		983	INLINE void
686	decode_ws (dec_t *dec)	984	decode_ws (dec_t *dec)
687	{	985	{
688	for (;;)	986	for (;;)
689	{	987	{
690	char ch = *dec->cur;	988	char ch = *dec->cur;
691		989
692	if (ch > 0x20	990	if (ch > 0x20)
		991	{
		992	if (expect_false (ch == '#'))
		993	{
		994	if (dec->json.flags & F_RELAXED)
		995	decode_comment (dec);
		996	else
		997	break;
		998	}
		999	else
		1000	break;
		1001	}
693	|| (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09))	1002	else if (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)
694	break;	1003	break; // parse error, but let higher level handle it, gives better error messages
695		1004
696	++dec->cur;	1005	++dec->cur;
697	}	1006	}
698	}	1007	}
699		1008
…		…
703	if (*dec->cur != ch) \	1012	if (*dec->cur != ch) \
704	ERR (# ch " expected"); \	1013	ERR (# ch " expected"); \
705	++dec->cur; \	1014	++dec->cur; \
706	SE	1015	SE
707		1016
708	#define DEC_INC_DEPTH if (++dec->depth > dec->maxdepth) ERR ("json datastructure exceeds maximum nesting level (set a higher max_depth)")	1017	#define DEC_INC_DEPTH if (++dec->depth > dec->json.max_depth) ERR (ERR_NESTING_EXCEEDED)
709	#define DEC_DEC_DEPTH --dec->depth	1018	#define DEC_DEC_DEPTH --dec->depth
710		1019
711	static SV *decode_sv (dec_t *dec);	1020	static SV *decode_sv (dec_t *dec);
712		1021
713	static signed char decode_hexdigit[256];	1022	static signed char decode_hexdigit[256];
…		…
805		1114
806	if (hi >= 0x80)	1115	if (hi >= 0x80)
807	{	1116	{
808	utf8 = 1;	1117	utf8 = 1;
809		1118
810	cur = (char *)uvuni_to_utf8_flags (cur, hi, 0);	1119	cur = encode_utf8 (cur, hi);
811	}	1120	}
812	else	1121	else
813	*cur++ = hi;	1122	*cur++ = hi;
814	}	1123	}
815	break;	1124	break;
…		…
817	default:	1126	default:
818	--dec_cur;	1127	--dec_cur;
819	ERR ("illegal backslash escape sequence in string");	1128	ERR ("illegal backslash escape sequence in string");
820	}	1129	}
821	}	1130	}
822	else if (expect_true (ch >= 0x20 && ch <= 0x7f))	1131	else if (expect_true (ch >= 0x20 && ch < 0x80))
823	*cur++ = ch;	1132	*cur++ = ch;
824	else if (ch >= 0x80)	1133	else if (ch >= 0x80)
825	{	1134	{
826	STRLEN clen;	1135	STRLEN clen;
827	UV uch;
828		1136
829	--dec_cur;	1137	--dec_cur;
830		1138
831	uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen);	1139	decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
832	if (clen == (STRLEN)-1)	1140	if (clen == (STRLEN)-1)
833	ERR ("malformed UTF-8 character in JSON string");	1141	ERR ("malformed UTF-8 character in JSON string");
834		1142
835	do	1143	do
836	*cur++ = *dec_cur++;	1144	*cur++ = *dec_cur++;
837	while (--clen);	1145	while (--clen);
838		1146
839	utf8 = 1;	1147	utf8 = 1;
840	}	1148	}
		1149	else if (ch == '\t' && dec->json.flags & F_RELAXED)
		1150	*cur++ = ch;
841	else	1151	else
842	{	1152	{
843	--dec_cur;	1153	--dec_cur;
844		1154
845	if (!ch)	1155	if (!ch)
…		…
853	{	1163	{
854	STRLEN len = cur - buf;	1164	STRLEN len = cur - buf;
855		1165
856	if (sv)	1166	if (sv)
857	{	1167	{
858	SvGROW (sv, SvCUR (sv) + len + 1);	1168	STRLEN cur = SvCUR (sv);
		1169
		1170	if (SvLEN (sv) <= cur + len)
		1171	SvGROW (sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
		1172
859	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);	1173	memcpy (SvPVX (sv) + SvCUR (sv), buf, len);
860	SvCUR_set (sv, SvCUR (sv) + len);	1174	SvCUR_set (sv, SvCUR (sv) + len);
861	}	1175	}
862	else	1176	else
863	sv = newSVpvn (buf, len);	1177	sv = newSVpvn (buf, len);
…		…
950		1264
951	if (!is_nv)	1265	if (!is_nv)
952	{	1266	{
953	int len = dec->cur - start;	1267	int len = dec->cur - start;
954		1268
955	// special case the rather common 1..4-digit-int case, assumes 32 bit ints or so	1269	// special case the rather common 1..5-digit-int case
956	if (*start == '-')	1270	if (*start == '-')
957	switch (len)	1271	switch (len)
958	{	1272	{
959	case 2: return newSViv (-( start [1] - '0' * 1));	1273	case 2: return newSViv (-(IV)( start [1] - '0' * 1));
960	case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11));	1274	case 3: return newSViv (-(IV)( start [1] * 10 + start [2] - '0' * 11));
961	case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));	1275	case 4: return newSViv (-(IV)( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
962	case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));	1276	case 5: return newSViv (-(IV)( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
		1277	case 6: return newSViv (-(IV)(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));
963	}	1278	}
964	else	1279	else
965	switch (len)	1280	switch (len)
966	{	1281	{
967	case 1: return newSViv ( start [0] - '0' * 1);	1282	case 1: return newSViv ( start [0] - '0' * 1);
968	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);	1283	case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
969	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);	1284	case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
970	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);	1285	case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
		1286	case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);
971	}	1287	}
972		1288
973	{	1289	{
974	UV uv;	1290	UV uv;
975	int numtype = grok_number (start, len, &uv);	1291	int numtype = grok_number (start, len, &uv);
…		…
984	}	1300	}
985		1301
986	len -= *start == '-' ? 1 : 0;	1302	len -= *start == '-' ? 1 : 0;
987		1303
988	// does not fit into IV or UV, try NV	1304	// does not fit into IV or UV, try NV
989	if ((sizeof (NV) == sizeof (double) && DBL_DIG >= len)	1305	if (len <= NV_DIG)
990	#if defined (LDBL_DIG)
991	|| (sizeof (NV) == sizeof (long double) && LDBL_DIG >= len)
992	#endif
993	)
994	// fits into NV without loss of precision	1306	// fits into NV without loss of precision
995	return newSVnv (Atof (start));	1307	return newSVnv (json_atof (start));
996		1308
997	// everything else fails, convert it to a string	1309	// everything else fails, convert it to a string
998	return newSVpvn (start, dec->cur - start);	1310	return newSVpvn (start, dec->cur - start);
999	}	1311	}
1000		1312
1001	// loss of precision here	1313	// loss of precision here
1002	return newSVnv (Atof (start));	1314	return newSVnv (json_atof (start));
1003		1315
1004	fail:	1316	fail:
1005	return 0;	1317	return 0;
1006	}	1318	}
1007		1319
…		…
1031	if (*dec->cur == ']')	1343	if (*dec->cur == ']')
1032	{	1344	{
1033	++dec->cur;	1345	++dec->cur;
1034	break;	1346	break;
1035	}	1347	}
1036		1348
1037	if (*dec->cur != ',')	1349	if (*dec->cur != ',')
1038	ERR (", or ] expected while parsing array");	1350	ERR (", or ] expected while parsing array");
1039		1351
1040	++dec->cur;	1352	++dec->cur;
		1353
		1354	decode_ws (dec);
		1355
		1356	if (*dec->cur == ']' && dec->json.flags & F_RELAXED)
		1357	{
		1358	++dec->cur;
		1359	break;
		1360	}
1041	}	1361	}
1042		1362
1043	DEC_DEC_DEPTH;	1363	DEC_DEC_DEPTH;
1044	return newRV_noinc ((SV *)av);	1364	return newRV_noinc ((SV *)av);
1045		1365
…		…
1061	if (*dec->cur == '}')	1381	if (*dec->cur == '}')
1062	++dec->cur;	1382	++dec->cur;
1063	else	1383	else
1064	for (;;)	1384	for (;;)
1065	{	1385	{
1066	decode_ws (dec); EXPECT_CH ('"');	1386	EXPECT_CH ('"');
1067		1387
1068	// heuristic: assume that	1388	// heuristic: assume that
1069	// a) decode_str + hv_store_ent are abysmally slow.	1389	// a) decode_str + hv_store_ent are abysmally slow.
1070	// b) most hash keys are short, simple ascii text.	1390	// b) most hash keys are short, simple ascii text.
1071	// => try to "fast-match" such strings to avoid	1391	// => try to "fast-match" such strings to avoid
…		…
1075	char *p = dec->cur;	1395	char *p = dec->cur;
1076	char *e = p + 24; // only try up to 24 bytes	1396	char *e = p + 24; // only try up to 24 bytes
1077		1397
1078	for (;;)	1398	for (;;)
1079	{	1399	{
1080	// the >= 0x80 is true on most architectures	1400	// the >= 0x80 is false on most architectures
1081	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')	1401	if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
1082	{	1402	{
1083	// slow path, back up and use decode_str	1403	// slow path, back up and use decode_str
1084	SV *key = decode_str (dec);	1404	SV *key = decode_str (dec);
1085	if (!key)	1405	if (!key)
1086	goto fail;	1406	goto fail;
1087		1407
1088	decode_ws (dec); EXPECT_CH (':');	1408	decode_ws (dec); EXPECT_CH (':');
1089		1409
		1410	decode_ws (dec);
1090	value = decode_sv (dec);	1411	value = decode_sv (dec);
1091	if (!value)	1412	if (!value)
1092	{	1413	{
1093	SvREFCNT_dec (key);	1414	SvREFCNT_dec (key);
1094	goto fail;	1415	goto fail;
…		…
1106	int len = p - key;	1427	int len = p - key;
1107	dec->cur = p + 1;	1428	dec->cur = p + 1;
1108		1429
1109	decode_ws (dec); EXPECT_CH (':');	1430	decode_ws (dec); EXPECT_CH (':');
1110		1431
		1432	decode_ws (dec);
1111	value = decode_sv (dec);	1433	value = decode_sv (dec);
1112	if (!value)	1434	if (!value)
1113	goto fail;	1435	goto fail;
1114		1436
1115	hv_store (hv, key, len, value, 0);	1437	hv_store (hv, key, len, value, 0);
…		…
1131		1453
1132	if (*dec->cur != ',')	1454	if (*dec->cur != ',')
1133	ERR (", or } expected while parsing object/hash");	1455	ERR (", or } expected while parsing object/hash");
1134		1456
1135	++dec->cur;	1457	++dec->cur;
		1458
		1459	decode_ws (dec);
		1460
		1461	if (*dec->cur == '}' && dec->json.flags & F_RELAXED)
		1462	{
		1463	++dec->cur;
		1464	break;
		1465	}
1136	}	1466	}
1137		1467
1138	DEC_DEC_DEPTH;	1468	DEC_DEC_DEPTH;
1139	sv = newRV_noinc ((SV *)hv);	1469	sv = newRV_noinc ((SV *)hv);
1140		1470
…		…
1147		1477
1148	hv_iterinit (hv);	1478	hv_iterinit (hv);
1149	he = hv_iternext (hv);	1479	he = hv_iternext (hv);
1150	hv_iterinit (hv);	1480	hv_iterinit (hv);
1151		1481
1152	// the next line creates a mortal sv each time its called.	1482	// the next line creates a mortal sv each time it's called.
1153	// might want to optimise this for common cases.	1483	// might want to optimise this for common cases.
1154	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);	1484	cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);
1155		1485
1156	if (cb)	1486	if (cb)
1157	{	1487	{
1158	dSP;	1488	dSP;
1159	int count;	1489	int count;
1160		1490
1161	ENTER; SAVETMPS; PUSHMARK (SP);	1491	ENTER; SAVETMPS;
		1492	SAVESTACK_POS ();
		1493	PUSHMARK (SP);
1162	XPUSHs (HeVAL (he));	1494	XPUSHs (HeVAL (he));
		1495	sv_2mortal (sv);
1163		1496
1164	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;	1497	PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
1165		1498
1166	if (count == 1)	1499	if (count == 1)
1167	{	1500	{
1168	sv = newSVsv (POPs);	1501	sv = newSVsv (POPs);
1169	FREETMPS; LEAVE;	1502	FREETMPS; LEAVE;
1170	return sv;	1503	return sv;
1171	}	1504	}
1172		1505
		1506	SvREFCNT_inc (sv);
1173	FREETMPS; LEAVE;	1507	FREETMPS; LEAVE;
1174	}	1508	}
1175	}	1509	}
1176		1510
1177	if (dec->json.cb_object)	1511	if (dec->json.cb_object)
1178	{	1512	{
1179	dSP;	1513	dSP;
1180	int count;	1514	int count;
1181		1515
1182	ENTER; SAVETMPS; PUSHMARK (SP);	1516	ENTER; SAVETMPS;
		1517	SAVESTACK_POS ();
		1518	PUSHMARK (SP);
1183	XPUSHs (sv_2mortal (sv));	1519	XPUSHs (sv_2mortal (sv));
1184		1520
1185	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;	1521	PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;
1186		1522
1187	if (count == 1)	1523	if (count == 1)
…		…
1203	DEC_DEC_DEPTH;	1539	DEC_DEC_DEPTH;
1204	return 0;	1540	return 0;
1205	}	1541	}
1206		1542
1207	static SV *	1543	static SV *
		1544	decode_tag (dec_t *dec)
		1545	{
		1546	SV *tag = 0;
		1547	SV *val = 0;
		1548
		1549	if (!(dec->json.flags & F_ALLOW_TAGS))
		1550	ERR ("malformed JSON string, neither array, object, number, string or atom");
		1551
		1552	++dec->cur;
		1553
		1554	decode_ws (dec);
		1555
		1556	tag = decode_sv (dec);
		1557	if (!tag)
		1558	goto fail;
		1559
		1560	if (!SvPOK (tag))
		1561	ERR ("malformed JSON string, (tag) must be a string");
		1562
		1563	decode_ws (dec);
		1564
		1565	if (*dec->cur != ')')
		1566	ERR (") expected after tag");
		1567
		1568	++dec->cur;
		1569
		1570	decode_ws (dec);
		1571
		1572	val = decode_sv (dec);
		1573	if (!val)
		1574	goto fail;
		1575
		1576	if (!SvROK (val) || SvTYPE (SvRV (val)) != SVt_PVAV)
		1577	ERR ("malformed JSON string, tag value must be an array");
		1578
		1579	{
		1580	AV *av = (AV *)SvRV (val);
		1581	int i, len = av_len (av) + 1;
		1582	HV *stash = gv_stashsv (tag, 0);
		1583	SV *sv;
		1584
		1585	if (!stash)
		1586	ERR ("cannot decode perl-object (package does not exist)");
		1587
		1588	GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
		1589
		1590	if (!method)
		1591	ERR ("cannot decode perl-object (package does not have a THAW method)");
		1592
		1593	dSP;
		1594
		1595	ENTER; SAVETMPS;
		1596	PUSHMARK (SP);
		1597	EXTEND (SP, len + 2);
		1598	// we re-bless the reference to get overload and other niceties right
		1599	PUSHs (tag);
		1600	PUSHs (sv_json);
		1601
		1602	for (i = 0; i < len; ++i)
		1603	PUSHs (*av_fetch (av, i, 1));
		1604
		1605	PUTBACK;
		1606	call_sv ((SV *)GvCV (method), G_SCALAR);
		1607	SPAGAIN;
		1608
		1609	SvREFCNT_dec (tag);
		1610	SvREFCNT_dec (val);
		1611	sv = SvREFCNT_inc (POPs);
		1612
		1613	PUTBACK;
		1614
		1615	FREETMPS; LEAVE;
		1616
		1617	return sv;
		1618	}
		1619
		1620	fail:
		1621	SvREFCNT_dec (tag);
		1622	SvREFCNT_dec (val);
		1623	return 0;
		1624	}
		1625
		1626	static SV *
1208	decode_sv (dec_t *dec)	1627	decode_sv (dec_t *dec)
1209	{	1628	{
1210	decode_ws (dec);
1211
1212	// the beauty of JSON: you need exactly one character lookahead	1629	// the beauty of JSON: you need exactly one character lookahead
1213	// to parse anything.	1630	// to parse everything.
1214	switch (*dec->cur)	1631	switch (*dec->cur)
1215	{	1632	{
1216	case '"': ++dec->cur; return decode_str (dec);	1633	case '"': ++dec->cur; return decode_str (dec);
1217	case '[': ++dec->cur; return decode_av (dec);	1634	case '[': ++dec->cur; return decode_av (dec);
1218	case '{': ++dec->cur; return decode_hv (dec);	1635	case '{': ++dec->cur; return decode_hv (dec);
		1636	case '(': return decode_tag (dec);
1219		1637
1220	case '-':	1638	case '-':
1221	case '0': case '1': case '2': case '3': case '4':	1639	case '0': case '1': case '2': case '3': case '4':
1222	case '5': case '6': case '7': case '8': case '9':	1640	case '5': case '6': case '7': case '8': case '9':
1223	return decode_num (dec);	1641	return decode_num (dec);
1224		1642
1225	case 't':	1643	case 't':
1226	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))	1644	if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
1227	{	1645	{
1228	dec->cur += 4;	1646	dec->cur += 4;
1229	return SvREFCNT_inc (json_true);	1647	#if JSON_SLOW
		1648	bool_true = get_bool ("Types::Serialiser::true");
		1649	#endif
		1650	return newSVsv (bool_true);
1230	}	1651	}
1231	else	1652	else
1232	ERR ("'true' expected");	1653	ERR ("'true' expected");
1233		1654
1234	break;	1655	break;
1235		1656
1236	case 'f':	1657	case 'f':
1237	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))	1658	if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
1238	{	1659	{
1239	dec->cur += 5;	1660	dec->cur += 5;
		1661	#if JSON_SLOW
		1662	bool_false = get_bool ("Types::Serialiser::false");
		1663	#endif
1240	return SvREFCNT_inc (json_false);	1664	return newSVsv (bool_false);
1241	}	1665	}
1242	else	1666	else
1243	ERR ("'false' expected");	1667	ERR ("'false' expected");
1244		1668
1245	break;	1669	break;
…		…
1254	ERR ("'null' expected");	1678	ERR ("'null' expected");
1255		1679
1256	break;	1680	break;
1257		1681
1258	default:	1682	default:
1259	ERR ("malformed JSON string, neither array, object, number, string or atom");	1683	ERR ("malformed JSON string, neither tag, array, object, number, string or atom");
1260	break;	1684	break;
1261	}	1685	}
1262		1686
1263	fail:	1687	fail:
1264	return 0;	1688	return 0;
1265	}	1689	}
1266		1690
1267	static SV *	1691	static SV *
1268	decode_json (SV *string, JSON *json, UV *offset_return)	1692	decode_json (SV *string, JSON *json, char **offset_return)
1269	{	1693	{
1270	dec_t dec;	1694	dec_t dec;
1271	UV offset;
1272	SV *sv;	1695	SV *sv;
1273		1696
		1697	/* work around bugs in 5.10 where manipulating magic values
		1698	* makes perl ignore the magic in subsequent accesses.
		1699	* also make a copy of non-PV values, to get them into a clean
		1700	* state (SvPV should do that, but it's buggy, see below).
		1701	*/
1274	SvGETMAGIC (string);	1702	/*SvGETMAGIC (string);*/
		1703	if (SvMAGICAL (string) || !SvPOK (string))
		1704	string = sv_2mortal (newSVsv (string));
		1705
1275	SvUPGRADE (string, SVt_PV);	1706	SvUPGRADE (string, SVt_PV);
1276		1707
1277	if (json->flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (json->flags))	1708	/* work around a bug in perl 5.10, which causes SvCUR to fail an
		1709	* assertion with -DDEBUGGING, although SvCUR is documented to
		1710	* return the xpv_cur field which certainly exists after upgrading.
		1711	* according to nicholas clark, calling SvPOK fixes this.
		1712	* But it doesn't fix it, so try another workaround, call SvPV_nolen
		1713	* and hope for the best.
		1714	* Damnit, SvPV_nolen still trips over yet another assertion. This
		1715	* assertion business is seriously broken, try yet another workaround
		1716	* for the broken -DDEBUGGING.
		1717	*/
		1718	{
		1719	#ifdef DEBUGGING
		1720	STRLEN offset = SvOK (string) ? sv_len (string) : 0;
		1721	#else
		1722	STRLEN offset = SvCUR (string);
		1723	#endif
		1724
		1725	if (offset > json->max_size && json->max_size)
1278	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",	1726	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
1279	(unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (json->flags));	1727	(unsigned long)SvCUR (string), (unsigned long)json->max_size);
		1728	}
1280		1729
1281	if (json->flags & F_UTF8)	1730	if (DECODE_WANTS_OCTETS (json))
1282	sv_utf8_downgrade (string, 0);	1731	sv_utf8_downgrade (string, 0);
1283	else	1732	else
1284	sv_utf8_upgrade (string);	1733	sv_utf8_upgrade (string);
1285		1734
1286	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP	1735	SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
1287		1736
1288	dec.json = *json;	1737	dec.json = *json;
1289	dec.cur = SvPVX (string);	1738	dec.cur = SvPVX (string);
1290	dec.end = SvEND (string);	1739	dec.end = SvEND (string);
1291	dec.err = 0;	1740	dec.err = 0;
1292	dec.depth = 0;	1741	dec.depth = 0;
1293	dec.maxdepth = DEC_DEPTH (dec.json.flags);
1294		1742
1295	if (dec.json.cb_object || dec.json.cb_sk_object)	1743	if (dec.json.cb_object || dec.json.cb_sk_object)
1296	dec.json.flags |= F_HOOK;	1744	dec.json.flags |= F_HOOK;
1297		1745
1298	*dec.end = 0; // this should basically be a nop, too, but make sure it's there	1746	*dec.end = 0; // this should basically be a nop, too, but make sure it's there
		1747
		1748	decode_ws (&dec);
1299	sv = decode_sv (&dec);	1749	sv = decode_sv (&dec);
		1750
		1751	if (offset_return)
		1752	*offset_return = dec.cur;
1300		1753
1301	if (!(offset_return || !sv))	1754	if (!(offset_return || !sv))
1302	{	1755	{
1303	// check for trailing garbage	1756	// check for trailing garbage
1304	decode_ws (&dec);	1757	decode_ws (&dec);
…		…
1307	{	1760	{
1308	dec.err = "garbage after JSON object";	1761	dec.err = "garbage after JSON object";
1309	SvREFCNT_dec (sv);	1762	SvREFCNT_dec (sv);
1310	sv = 0;	1763	sv = 0;
1311	}	1764	}
1312	}
1313
1314	if (offset_return || !sv)
1315	{
1316	offset = dec.json.flags & F_UTF8
1317	? dec.cur - SvPVX (string)
1318	: utf8_distance (dec.cur, SvPVX (string));
1319
1320	if (offset_return)
1321	*offset_return = offset;
1322	}	1765	}
1323		1766
1324	if (!sv)	1767	if (!sv)
1325	{	1768	{
1326	SV *uni = sv_newmortal ();	1769	SV *uni = sv_newmortal ();
…		…
1332	SAVEVPTR (PL_curcop);	1775	SAVEVPTR (PL_curcop);
1333	PL_curcop = &cop;	1776	PL_curcop = &cop;
1334	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);	1777	pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);
1335	LEAVE;	1778	LEAVE;
1336		1779
1337	croak ("%s, at character offset %d [\"%s\"]",	1780	croak ("%s, at character offset %d (before \"%s\")",
1338	dec.err,	1781	dec.err,
1339	(int)offset,	1782	(int)ptr_to_index (string, dec.cur),
1340	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");	1783	dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
1341	}	1784	}
1342		1785
1343	sv = sv_2mortal (sv);	1786	sv = sv_2mortal (sv);
1344		1787
1345	if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))	1788	if (!(dec.json.flags & F_ALLOW_NONREF) && json_nonref (sv))
1346	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");	1789	croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
1347		1790
1348	return sv;	1791	return sv;
		1792	}
		1793
		1794	/////////////////////////////////////////////////////////////////////////////
		1795	// incremental parser
		1796
		1797	static void
		1798	incr_parse (JSON *self)
		1799	{
		1800	const char *p = SvPVX (self->incr_text) + self->incr_pos;
		1801
		1802	// the state machine here is a bit convoluted and could be simplified a lot
		1803	// but this would make it slower, so...
		1804
		1805	for (;;)
		1806	{
		1807	//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
		1808	switch (self->incr_mode)
		1809	{
		1810	// only used for initial whitespace skipping
		1811	case INCR_M_WS:
		1812	for (;;)
		1813	{
		1814	if (*p > 0x20)
		1815	{
		1816	if (*p == '#')
		1817	{
		1818	self->incr_mode = INCR_M_C0;
		1819	goto incr_m_c;
		1820	}
		1821	else
		1822	{
		1823	self->incr_mode = INCR_M_JSON;
		1824	goto incr_m_json;
		1825	}
		1826	}
		1827	else if (!*p)
		1828	goto interrupt;
		1829
		1830	++p;
		1831	}
		1832
		1833	// skip a single char inside a string (for \\-processing)
		1834	case INCR_M_BS:
		1835	if (!*p)
		1836	goto interrupt;
		1837
		1838	++p;
		1839	self->incr_mode = INCR_M_STR;
		1840	goto incr_m_str;
		1841
		1842	// inside #-style comments
		1843	case INCR_M_C0:
		1844	case INCR_M_C1:
		1845	incr_m_c:
		1846	for (;;)
		1847	{
		1848	if (*p == '\n')
		1849	{
		1850	self->incr_mode = self->incr_mode == INCR_M_C0 ? INCR_M_WS : INCR_M_JSON;
		1851	break;
		1852	}
		1853	else if (!*p)
		1854	goto interrupt;
		1855
		1856	++p;
		1857	}
		1858
		1859	break;
		1860
		1861	// inside a string
		1862	case INCR_M_STR:
		1863	incr_m_str:
		1864	for (;;)
		1865	{
		1866	if (*p == '"')
		1867	{
		1868	++p;
		1869	self->incr_mode = INCR_M_JSON;
		1870
		1871	if (!self->incr_nest)
		1872	goto interrupt;
		1873
		1874	goto incr_m_json;
		1875	}
		1876	else if (*p == '\\')
		1877	{
		1878	++p; // "virtually" consumes character after \
		1879
		1880	if (!*p) // if at end of string we have to switch modes
		1881	{
		1882	self->incr_mode = INCR_M_BS;
		1883	goto interrupt;
		1884	}
		1885	}
		1886	else if (!*p)
		1887	goto interrupt;
		1888
		1889	++p;
		1890	}
		1891
		1892	// after initial ws, outside string
		1893	case INCR_M_JSON:
		1894	incr_m_json:
		1895	for (;;)
		1896	{
		1897	switch (*p++)
		1898	{
		1899	case 0:
		1900	--p;
		1901	goto interrupt;
		1902
		1903	case 0x09:
		1904	case 0x0a:
		1905	case 0x0d:
		1906	case 0x20:
		1907	if (!self->incr_nest)
		1908	{
		1909	--p; // do not eat the whitespace, let the next round do it
		1910	goto interrupt;
		1911	}
		1912	break;
		1913
		1914	case '"':
		1915	self->incr_mode = INCR_M_STR;
		1916	goto incr_m_str;
		1917
		1918	case '[':
		1919	case '{':
		1920	case '(':
		1921	if (++self->incr_nest > self->max_depth)
		1922	croak (ERR_NESTING_EXCEEDED);
		1923	break;
		1924
		1925	case ']':
		1926	case '}':
		1927	if (--self->incr_nest <= 0)
		1928	goto interrupt;
		1929	break;
		1930
		1931	case ')':
		1932	--self->incr_nest;
		1933	break;
		1934
		1935	case '#':
		1936	self->incr_mode = INCR_M_C1;
		1937	goto incr_m_c;
		1938	}
		1939	}
		1940	}
		1941
		1942	modechange:
		1943	;
		1944	}
		1945
		1946	interrupt:
		1947	self->incr_pos = p - SvPVX (self->incr_text);
		1948	//printf ("interrupt<%.*s>\n", self->incr_pos, SvPVX(self->incr_text));//D
		1949	//printf ("return pos %d mode %d nest %d\n", self->incr_pos, self->incr_mode, self->incr_nest);//D
1349	}	1950	}
1350		1951
1351	/////////////////////////////////////////////////////////////////////////////	1952	/////////////////////////////////////////////////////////////////////////////
1352	// XS interface functions	1953	// XS interface functions
1353		1954
…		…
1362	i >= '0' && i <= '9' ? i - '0'	1963	i >= '0' && i <= '9' ? i - '0'
1363	: i >= 'a' && i <= 'f' ? i - 'a' + 10	1964	: i >= 'a' && i <= 'f' ? i - 'a' + 10
1364	: i >= 'A' && i <= 'F' ? i - 'A' + 10	1965	: i >= 'A' && i <= 'F' ? i - 'A' + 10
1365	: -1;	1966	: -1;
1366		1967
1367	json_stash = gv_stashpv ("JSON::XS" , 1);	1968	json_stash = gv_stashpv ("JSON::XS" , 1);
1368	json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);	1969	bool_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
		1970	bool_true = get_bool ("Types::Serialiser::true");
		1971	bool_false = get_bool ("Types::Serialiser::false");
1369		1972
1370	json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true );	1973	sv_json = newSVpv ("JSON", 0);
1371	json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false);	1974	SvREADONLY_on (sv_json);
		1975
		1976	CvNODEBUG_on (get_cv ("JSON::XS::incr_text", 0)); /* the debugger completely breaks lvalue subs */
1372	}	1977	}
1373		1978
1374	PROTOTYPES: DISABLE	1979	PROTOTYPES: DISABLE
1375		1980
1376	void CLONE (...)	1981	void CLONE (...)
1377	CODE:	1982	CODE:
1378	json_stash = 0;	1983	json_stash = 0;
1379	json_boolean_stash = 0;	1984	bool_stash = 0;
1380		1985
1381	void new (char *klass)	1986	void new (char *klass)
1382	PPCODE:	1987	PPCODE:
1383	{	1988	{
1384	HV *stash = !JSON_SLOW || json_stash
1385	? json_stash
1386	: gv_stashpv ("JSON::XS", 1);
1387	SV *pv = NEWSV (0, sizeof (JSON));	1989	SV *pv = NEWSV (0, sizeof (JSON));
1388	SvPOK_only (pv);	1990	SvPOK_only (pv);
1389	Zero (SvPVX (pv), 1, JSON);	1991	json_init ((JSON *)SvPVX (pv));
1390	((JSON *)SvPVX (pv))->flags = F_DEFAULT;	1992	XPUSHs (sv_2mortal (sv_bless (
1391	XPUSHs (sv_2mortal (sv_bless (newRV_noinc (pv), stash)));	1993	newRV_noinc (pv),
		1994	strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)
		1995	)));
1392	}	1996	}
1393		1997
1394	void ascii (JSON *self, int enable = 1)	1998	void ascii (JSON *self, int enable = 1)
1395	ALIAS:	1999	ALIAS:
1396	ascii = F_ASCII	2000	ascii = F_ASCII
…		…
1403	pretty = F_PRETTY	2007	pretty = F_PRETTY
1404	allow_nonref = F_ALLOW_NONREF	2008	allow_nonref = F_ALLOW_NONREF
1405	shrink = F_SHRINK	2009	shrink = F_SHRINK
1406	allow_blessed = F_ALLOW_BLESSED	2010	allow_blessed = F_ALLOW_BLESSED
1407	convert_blessed = F_CONV_BLESSED	2011	convert_blessed = F_CONV_BLESSED
		2012	relaxed = F_RELAXED
		2013	allow_unknown = F_ALLOW_UNKNOWN
		2014	allow_tags = F_ALLOW_TAGS
1408	PPCODE:	2015	PPCODE:
1409	{	2016	{
1410	if (enable)	2017	if (enable)
1411	self->flags |= ix;	2018	self->flags |= ix;
1412	else	2019	else
1413	self->flags &= ~ix;	2020	self->flags &= ~ix;
1414		2021
1415	XPUSHs (ST (0));	2022	XPUSHs (ST (0));
1416	}	2023	}
1417		2024
1418	void max_depth (JSON *self, UV max_depth = 0x80000000UL)	2025	void get_ascii (JSON *self)
		2026	ALIAS:
		2027	get_ascii = F_ASCII
		2028	get_latin1 = F_LATIN1
		2029	get_utf8 = F_UTF8
		2030	get_indent = F_INDENT
		2031	get_canonical = F_CANONICAL
		2032	get_space_before = F_SPACE_BEFORE
		2033	get_space_after = F_SPACE_AFTER
		2034	get_allow_nonref = F_ALLOW_NONREF
		2035	get_shrink = F_SHRINK
		2036	get_allow_blessed = F_ALLOW_BLESSED
		2037	get_convert_blessed = F_CONV_BLESSED
		2038	get_relaxed = F_RELAXED
		2039	get_allow_unknown = F_ALLOW_UNKNOWN
		2040	get_allow_tags = F_ALLOW_TAGS
1419	PPCODE:	2041	PPCODE:
1420	{	2042	XPUSHs (boolSV (self->flags & ix));
1421	UV log2 = 0;
1422		2043
1423	if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;	2044	void max_depth (JSON *self, U32 max_depth = 0x80000000UL)
1424		2045	PPCODE:
1425	while ((1UL << log2) < max_depth)	2046	self->max_depth = max_depth;
1426	++log2;
1427
1428	self->flags = self->flags & ~F_MAXDEPTH | (log2 << S_MAXDEPTH);
1429
1430	XPUSHs (ST (0));	2047	XPUSHs (ST (0));
1431	}
1432		2048
		2049	U32 get_max_depth (JSON *self)
		2050	CODE:
		2051	RETVAL = self->max_depth;
		2052	OUTPUT:
		2053	RETVAL
		2054
1433	void max_size (JSON *self, UV max_size = 0)	2055	void max_size (JSON *self, U32 max_size = 0)
1434	PPCODE:	2056	PPCODE:
1435	{	2057	self->max_size = max_size;
1436	UV log2 = 0;
1437
1438	if (max_size > 0x80000000UL) max_size = 0x80000000UL;
1439	if (max_size == 1) max_size = 2;
1440
1441	while ((1UL << log2) < max_size)
1442	++log2;
1443
1444	self->flags = self->flags & ~F_MAXSIZE | (log2 << S_MAXSIZE);
1445
1446	XPUSHs (ST (0));	2058	XPUSHs (ST (0));
1447	}	2059
		2060	int get_max_size (JSON *self)
		2061	CODE:
		2062	RETVAL = self->max_size;
		2063	OUTPUT:
		2064	RETVAL
1448		2065
1449	void filter_json_object (JSON *self, SV *cb = &PL_sv_undef)	2066	void filter_json_object (JSON *self, SV *cb = &PL_sv_undef)
1450	PPCODE:	2067	PPCODE:
1451	{	2068	{
1452	SvREFCNT_dec (self->cb_object);	2069	SvREFCNT_dec (self->cb_object);
…		…
1456	}	2073	}
1457		2074
1458	void filter_json_single_key_object (JSON *self, SV *key, SV *cb = &PL_sv_undef)	2075	void filter_json_single_key_object (JSON *self, SV *key, SV *cb = &PL_sv_undef)
1459	PPCODE:	2076	PPCODE:
1460	{	2077	{
1461	if (!self->cb_sk_object)	2078	if (!self->cb_sk_object)
1462	self->cb_sk_object = newHV ();	2079	self->cb_sk_object = newHV ();
1463		2080
1464	if (SvOK (cb))	2081	if (SvOK (cb))
1465	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);	2082	hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1466	else	2083	else
…		…
1477	XPUSHs (ST (0));	2094	XPUSHs (ST (0));
1478	}	2095	}
1479		2096
1480	void encode (JSON *self, SV *scalar)	2097	void encode (JSON *self, SV *scalar)
1481	PPCODE:	2098	PPCODE:
1482	XPUSHs (encode_json (scalar, self));	2099	PUTBACK; scalar = encode_json (scalar, self); SPAGAIN;
		2100	XPUSHs (scalar);
1483		2101
1484	void decode (JSON *self, SV *jsonstr)	2102	void decode (JSON *self, SV *jsonstr)
1485	PPCODE:	2103	PPCODE:
1486	XPUSHs (decode_json (jsonstr, self, 0));	2104	PUTBACK; jsonstr = decode_json (jsonstr, self, 0); SPAGAIN;
		2105	XPUSHs (jsonstr);
1487		2106
1488	void decode_prefix (JSON *self, SV *jsonstr)	2107	void decode_prefix (JSON *self, SV *jsonstr)
1489	PPCODE:	2108	PPCODE:
1490	{	2109	{
1491	UV offset;	2110	SV *sv;
		2111	char *offset;
		2112	PUTBACK; sv = decode_json (jsonstr, self, &offset); SPAGAIN;
1492	EXTEND (SP, 2);	2113	EXTEND (SP, 2);
1493	PUSHs (decode_json (jsonstr, self, &offset));	2114	PUSHs (sv);
1494	PUSHs (sv_2mortal (newSVuv (offset)));	2115	PUSHs (sv_2mortal (newSVuv (ptr_to_index (jsonstr, offset))));
		2116	}
		2117
		2118	void incr_parse (JSON *self, SV *jsonstr = 0)
		2119	PPCODE:
		2120	{
		2121	if (!self->incr_text)
		2122	self->incr_text = newSVpvn ("", 0);
		2123
		2124	/* if utf8-ness doesn't match the decoder, need to upgrade/downgrade */
		2125	if (!DECODE_WANTS_OCTETS (self) == !SvUTF8 (self->incr_text))
		2126	if (DECODE_WANTS_OCTETS (self))
		2127	{
		2128	if (self->incr_pos)
		2129	self->incr_pos = utf8_length ((U8 *)SvPVX (self->incr_text),
		2130	(U8 *)SvPVX (self->incr_text) + self->incr_pos);
		2131
		2132	sv_utf8_downgrade (self->incr_text, 0);
		2133	}
		2134	else
		2135	{
		2136	sv_utf8_upgrade (self->incr_text);
		2137
		2138	if (self->incr_pos)
		2139	self->incr_pos = utf8_hop ((U8 *)SvPVX (self->incr_text), self->incr_pos)
		2140	- (U8 *)SvPVX (self->incr_text);
		2141	}
		2142
		2143	// append data, if any
		2144	if (jsonstr)
		2145	{
		2146	/* make sure both strings have same encoding */
		2147	if (SvUTF8 (jsonstr) != SvUTF8 (self->incr_text))
		2148	if (SvUTF8 (jsonstr))
		2149	sv_utf8_downgrade (jsonstr, 0);
		2150	else
		2151	sv_utf8_upgrade (jsonstr);
		2152
		2153	/* and then just blindly append */
		2154	{
		2155	STRLEN len;
		2156	const char *str = SvPV (jsonstr, len);
		2157	STRLEN cur = SvCUR (self->incr_text);
		2158
		2159	if (SvLEN (self->incr_text) <= cur + len)
		2160	SvGROW (self->incr_text, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
		2161
		2162	Move (str, SvEND (self->incr_text), len, char);
		2163	SvCUR_set (self->incr_text, SvCUR (self->incr_text) + len);
		2164	*SvEND (self->incr_text) = 0; // this should basically be a nop, too, but make sure it's there
		2165	}
		2166	}
		2167
		2168	if (GIMME_V != G_VOID)
		2169	do
		2170	{
		2171	SV *sv;
		2172	char *offset;
		2173
		2174	if (!INCR_DONE (self))
		2175	{
		2176	incr_parse (self);
		2177
		2178	if (self->incr_pos > self->max_size && self->max_size)
		2179	croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
		2180	(unsigned long)self->incr_pos, (unsigned long)self->max_size);
		2181
		2182	if (!INCR_DONE (self))
		2183	{
		2184	// as an optimisation, do not accumulate white space in the incr buffer
		2185	if (self->incr_mode == INCR_M_WS && self->incr_pos)
		2186	{
		2187	self->incr_pos = 0;
		2188	SvCUR_set (self->incr_text, 0);
		2189	}
		2190
		2191	break;
		2192	}
		2193	}
		2194
		2195	PUTBACK; sv = decode_json (self->incr_text, self, &offset); SPAGAIN;
		2196	XPUSHs (sv);
		2197
		2198	self->incr_pos -= offset - SvPVX (self->incr_text);
		2199	self->incr_nest = 0;
		2200	self->incr_mode = 0;
		2201
		2202	sv_chop (self->incr_text, offset);
		2203	}
		2204	while (GIMME_V == G_ARRAY);
		2205	}
		2206
		2207	SV *incr_text (JSON *self)
		2208	ATTRS: lvalue
		2209	CODE:
		2210	{
		2211	if (self->incr_pos)
		2212	croak ("incr_text can not be called when the incremental parser already started parsing");
		2213
		2214	RETVAL = self->incr_text ? SvREFCNT_inc (self->incr_text) : &PL_sv_undef;
		2215	}
		2216	OUTPUT:
		2217	RETVAL
		2218
		2219	void incr_skip (JSON *self)
		2220	CODE:
		2221	{
		2222	if (self->incr_pos)
		2223	{
		2224	sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + self->incr_pos);
		2225	self->incr_pos = 0;
		2226	self->incr_nest = 0;
		2227	self->incr_mode = 0;
		2228	}
		2229	}
		2230
		2231	void incr_reset (JSON *self)
		2232	CODE:
		2233	{
		2234	SvREFCNT_dec (self->incr_text);
		2235	self->incr_text = 0;
		2236	self->incr_pos = 0;
		2237	self->incr_nest = 0;
		2238	self->incr_mode = 0;
1495	}	2239	}
1496		2240
1497	void DESTROY (JSON *self)	2241	void DESTROY (JSON *self)
1498	CODE:	2242	CODE:
1499	SvREFCNT_dec (self->cb_sk_object);	2243	SvREFCNT_dec (self->cb_sk_object);
1500	SvREFCNT_dec (self->cb_object);	2244	SvREFCNT_dec (self->cb_object);
		2245	SvREFCNT_dec (self->incr_text);
1501		2246
1502	PROTOTYPES: ENABLE	2247	PROTOTYPES: ENABLE
1503		2248
1504	void to_json (SV *scalar)	2249	void encode_json (SV *scalar)
1505	PPCODE:	2250	PPCODE:
1506	{	2251	{
1507	JSON json = { F_DEFAULT | F_UTF8 };	2252	JSON json;
1508	XPUSHs (encode_json (scalar, &json));	2253	json_init (&json);
		2254	json.flags |= F_UTF8;
		2255	PUTBACK; scalar = encode_json (scalar, &json); SPAGAIN;
		2256	XPUSHs (scalar);
1509	}	2257	}
1510		2258
1511	void from_json (SV *jsonstr)	2259	void decode_json (SV *jsonstr)
1512	PPCODE:	2260	PPCODE:
1513	{	2261	{
1514	JSON json = { F_DEFAULT | F_UTF8 };	2262	JSON json;
1515	XPUSHs (decode_json (jsonstr, &json, 0));	2263	json_init (&json);
		2264	json.flags |= F_UTF8;
		2265	PUTBACK; jsonstr = decode_json (jsonstr, &json, 0); SPAGAIN;
		2266	XPUSHs (jsonstr);
1516	}	2267	}
1517		2268

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