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Comparing JSON-XS/XS.xs (file contents):
Revision 1.45 by root, Mon Jun 25 06:57:42 2007 UTC vs.
Revision 1.108 by root, Tue Aug 17 23:27:36 2010 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>
9 11
10#if defined(__BORLANDC__) || defined(_MSC_VER) 12#if defined(__BORLANDC__) || defined(_MSC_VER)
11# define snprintf _snprintf // C compilers have this in stdio.h 13# define snprintf _snprintf // C compilers have this in stdio.h
12#endif 14#endif
13 15
14// 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
15// guarentees, though. if it breaks, you get to keep the pieces. 17// guarantees, though. if it breaks, you get to keep the pieces.
16#ifndef UTF8_MAXBYTES 18#ifndef UTF8_MAXBYTES
17# define UTF8_MAXBYTES 13 19# define UTF8_MAXBYTES 13
18#endif 20#endif
21
22// three extra for rounding, sign, and end of string
23#define IVUV_MAXCHARS (sizeof (UV) * CHAR_BIT * 28 / 93 + 3)
19 24
20#define F_ASCII 0x00000001UL 25#define F_ASCII 0x00000001UL
21#define F_LATIN1 0x00000002UL 26#define F_LATIN1 0x00000002UL
22#define F_UTF8 0x00000004UL 27#define F_UTF8 0x00000004UL
23#define F_INDENT 0x00000008UL 28#define F_INDENT 0x00000008UL
… …
25#define F_SPACE_BEFORE 0x00000020UL 30#define F_SPACE_BEFORE 0x00000020UL
26#define F_SPACE_AFTER 0x00000040UL 31#define F_SPACE_AFTER 0x00000040UL
27#define F_ALLOW_NONREF 0x00000100UL 32#define F_ALLOW_NONREF 0x00000100UL
28#define F_SHRINK 0x00000200UL 33#define F_SHRINK 0x00000200UL
29#define F_ALLOW_BLESSED 0x00000400UL 34#define F_ALLOW_BLESSED 0x00000400UL
30#define F_CONV_BLESSED 0x00000800UL // NYI 35#define F_CONV_BLESSED 0x00000800UL
31#define F_MAXDEPTH 0xf8000000UL
32#define S_MAXDEPTH 27
33#define F_MAXSIZE 0x01f00000UL 36#define F_RELAXED 0x00001000UL
34#define S_MAXSIZE 20 37#define F_ALLOW_UNKNOWN 0x00002000UL
35 38#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
36#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
37#define DEC_SIZE(flags) (1UL << ((flags & F_MAXSIZE ) >> S_MAXSIZE ))
38 39
39#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER 40#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER
40#define F_DEFAULT (9UL << S_MAXDEPTH)
41 41
42#define INIT_SIZE 32 // initial scalar size to be allocated 42#define INIT_SIZE 32 // initial scalar size to be allocated
43#define INDENT_STEP 3 // spaces per indentation level 43#define INDENT_STEP 3 // spaces per indentation level
44 44
45#define SHORT_STRING_LEN 16384 // special-case strings of up to this size 45#define SHORT_STRING_LEN 16384 // special-case strings of up to this size
46 46
47#define DECODE_WANTS_OCTETS(json) ((json)->flags & F_UTF8)
48
47#define SB do { 49#define SB do {
48#define SE } while (0) 50#define SE } while (0)
49 51
50#if __GNUC__ >= 3 52#if __GNUC__ >= 3
51# define expect(expr,value) __builtin_expect ((expr),(value)) 53# define expect(expr,value) __builtin_expect ((expr), (value))
52# define inline inline 54# define INLINE static inline
53#else 55#else
54# define expect(expr,value) (expr) 56# define expect(expr,value) (expr)
55# define inline static 57# define INLINE static
56#endif 58#endif
57 59
58#define expect_false(expr) expect ((expr) != 0, 0) 60#define expect_false(expr) expect ((expr) != 0, 0)
59#define expect_true(expr) expect ((expr) != 0, 1) 61#define expect_true(expr) expect ((expr) != 0, 1)
60 62
63#define IN_RANGE_INC(type,val,beg,end) \
64 ((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
65 <= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
66
67#define ERR_NESTING_EXCEEDED "json text or perl structure exceeds maximum nesting level (max_depth set too low?)"
68
69#ifdef USE_ITHREADS
70# define JSON_SLOW 1
71# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1))
72#else
73# define JSON_SLOW 0
74# define JSON_STASH json_stash
75#endif
76
61static HV *json_stash, *json_boolean_stash; // JSON::XS:: 77static HV *json_stash, *json_boolean_stash; // JSON::XS::
62static SV *json_true, *json_false; 78static SV *json_true, *json_false;
63 79
80enum {
81 INCR_M_WS = 0, // initial whitespace skipping, must be 0
82 INCR_M_STR, // inside string
83 INCR_M_BS, // inside backslash
84 INCR_M_C0, // inside comment in initial whitespace sequence
85 INCR_M_C1, // inside comment in other places
86 INCR_M_JSON // outside anything, count nesting
87};
88
89#define INCR_DONE(json) ((json)->incr_nest <= 0 && (json)->incr_mode == INCR_M_JSON)
90
91typedef struct {
92 U32 flags;
93 U32 max_depth;
94 STRLEN max_size;
95
96 SV *cb_object;
97 HV *cb_sk_object;
98
99 // for the incremental parser
100 SV *incr_text; // the source text so far
101 STRLEN incr_pos; // the current offset into the text
102 int incr_nest; // {[]}-nesting level
103 unsigned char incr_mode;
104} JSON;
105
106INLINE void
107json_init (JSON *json)
108{
109 Zero (json, 1, JSON);
110 json->max_depth = 512;
111}
112
64///////////////////////////////////////////////////////////////////////////// 113/////////////////////////////////////////////////////////////////////////////
65// utility functions 114// utility functions
66 115
67static UV * 116INLINE SV *
68SvJSON (SV *sv) 117get_bool (const char *name)
69{ 118{
70 if (!(SvROK (sv) && SvOBJECT (SvRV (sv)) && SvSTASH (SvRV (sv)) == json_stash)) 119 SV *sv = get_sv (name, 1);
71 croak ("object is not of type JSON::XS");
72 120
73 return &SvUVX (SvRV (sv)); 121 SvREADONLY_on (sv);
74} 122 SvREADONLY_on (SvRV (sv));
75 123
76static void 124 return sv;
125}
126
127INLINE void
77shrink (SV *sv) 128shrink (SV *sv)
78{ 129{
79 sv_utf8_downgrade (sv, 1); 130 sv_utf8_downgrade (sv, 1);
131
80 if (SvLEN (sv) > SvCUR (sv) + 1) 132 if (SvLEN (sv) > SvCUR (sv) + 1)
81 { 133 {
82#ifdef SvPV_shrink_to_cur 134#ifdef SvPV_shrink_to_cur
83 SvPV_shrink_to_cur (sv); 135 SvPV_shrink_to_cur (sv);
84#elif defined (SvPV_renew) 136#elif defined (SvPV_renew)
… …
90// decode an utf-8 character and return it, or (UV)-1 in 142// decode an utf-8 character and return it, or (UV)-1 in
91// case of an error. 143// case of an error.
92// we special-case "safe" characters from U+80 .. U+7FF, 144// we special-case "safe" characters from U+80 .. U+7FF,
93// but use the very good perl function to parse anything else. 145// but use the very good perl function to parse anything else.
94// note that we never call this function for a ascii codepoints 146// note that we never call this function for a ascii codepoints
95inline UV 147INLINE UV
96decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen) 148decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)
97{ 149{
98 if (expect_false (s[0] > 0xdf || s[0] < 0xc2)) 150 if (expect_true (len >= 2
99 return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY); 151 && IN_RANGE_INC (char, s[0], 0xc2, 0xdf)
100 else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf) 152 && IN_RANGE_INC (char, s[1], 0x80, 0xbf)))
101 { 153 {
102 *clen = 2; 154 *clen = 2;
103 return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f); 155 return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);
104 } 156 }
105 else 157 else
106 { 158 return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);
107 *clen = (STRLEN)-1; 159}
108 return (UV)-1; 160
161// likewise for encoding, also never called for ascii codepoints
162// this function takes advantage of this fact, although current gccs
163// seem to optimise the check for >= 0x80 away anyways
164INLINE unsigned char *
165encode_utf8 (unsigned char *s, UV ch)
166{
167 if (expect_false (ch < 0x000080))
168 *s++ = ch;
169 else if (expect_true (ch < 0x000800))
170 *s++ = 0xc0 | ( ch >> 6),
171 *s++ = 0x80 | ( ch & 0x3f);
172 else if ( ch < 0x010000)
173 *s++ = 0xe0 | ( ch >> 12),
174 *s++ = 0x80 | ((ch >> 6) & 0x3f),
175 *s++ = 0x80 | ( ch & 0x3f);
176 else if ( ch < 0x110000)
177 *s++ = 0xf0 | ( ch >> 18),
178 *s++ = 0x80 | ((ch >> 12) & 0x3f),
179 *s++ = 0x80 | ((ch >> 6) & 0x3f),
180 *s++ = 0x80 | ( ch & 0x3f);
181
182 return s;
183}
184
185// convert offset pointer to character index, sv must be string
186static STRLEN
187ptr_to_index (SV *sv, char *offset)
188{
189 return SvUTF8 (sv)
190 ? utf8_distance (offset, SvPVX (sv))
191 : offset - SvPVX (sv);
192}
193
194/////////////////////////////////////////////////////////////////////////////
195// fp hell
196
197// scan a group of digits, and a trailing exponent
198static void
199json_atof_scan1 (const char *s, NV *accum, int *expo, int postdp, int maxdepth)
200{
201 UV uaccum = 0;
202 int eaccum = 0;
203
204 // if we recurse too deep, skip all remaining digits
205 // to avoid a stack overflow attack
206 if (expect_false (--maxdepth <= 0))
207 while (((U8)*s - '0') < 10)
208 ++s;
209
210 for (;;)
109 } 211 {
110} 212 U8 dig = (U8)*s - '0';
111 213
214 if (expect_false (dig >= 10))
215 {
216 if (dig == (U8)((U8)'.' - (U8)'0'))
217 {
218 ++s;
219 json_atof_scan1 (s, accum, expo, 1, maxdepth);
220 }
221 else if ((dig | ' ') == 'e' - '0')
222 {
223 int exp2 = 0;
224 int neg = 0;
225
226 ++s;
227
228 if (*s == '-')
229 {
230 ++s;
231 neg = 1;
232 }
233 else if (*s == '+')
234 ++s;
235
236 while ((dig = (U8)*s - '0') < 10)
237 exp2 = exp2 * 10 + *s++ - '0';
238
239 *expo += neg ? -exp2 : exp2;
240 }
241
242 break;
243 }
244
245 ++s;
246
247 uaccum = uaccum * 10 + dig;
248 ++eaccum;
249
250 // if we have too many digits, then recurse for more
251 // we actually do this for rather few digits
252 if (uaccum >= (UV_MAX - 9) / 10)
253 {
254 if (postdp) *expo -= eaccum;
255 json_atof_scan1 (s, accum, expo, postdp, maxdepth);
256 if (postdp) *expo += eaccum;
257
258 break;
259 }
260 }
261
262 // this relies greatly on the quality of the pow ()
263 // implementation of the platform, but a good
264 // implementation is hard to beat.
265 if (postdp) *expo -= eaccum;
266 *accum += uaccum * Perl_pow (10., *expo);
267 *expo += eaccum;
268}
269
270static NV
271json_atof (const char *s)
272{
273 NV accum = 0.;
274 int expo = 0;
275 int neg = 0;
276
277 if (*s == '-')
278 {
279 ++s;
280 neg = 1;
281 }
282
283 // a recursion depth of ten gives us >>500 bits
284 json_atof_scan1 (s, &accum, &expo, 0, 10);
285
286 return neg ? -accum : accum;
287}
112///////////////////////////////////////////////////////////////////////////// 288/////////////////////////////////////////////////////////////////////////////
113// encoder 289// encoder
114 290
115// structure used for encoding JSON 291// structure used for encoding JSON
116typedef struct 292typedef struct
117{ 293{
118 char *cur; // SvPVX (sv) + current output position 294 char *cur; // SvPVX (sv) + current output position
119 char *end; // SvEND (sv) 295 char *end; // SvEND (sv)
120 SV *sv; // result scalar 296 SV *sv; // result scalar
121 U32 flags; // F_* 297 JSON json;
122 U32 indent; // indentation level 298 U32 indent; // indentation level
123 U32 maxdepth; // max. indentation/recursion level 299 UV limit; // escape character values >= this value when encoding
124} enc_t; 300} enc_t;
125 301
126inline void 302INLINE void
127need (enc_t *enc, STRLEN len) 303need (enc_t *enc, STRLEN len)
128{ 304{
129 if (expect_false (enc->cur + len >= enc->end)) 305 if (expect_false (enc->cur + len >= enc->end))
130 { 306 {
131 STRLEN cur = enc->cur - SvPVX (enc->sv); 307 STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
132 SvGROW (enc->sv, cur + len + 1); 308 SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
133 enc->cur = SvPVX (enc->sv) + cur; 309 enc->cur = SvPVX (enc->sv) + cur;
134 enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1; 310 enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
135 } 311 }
136} 312}
137 313
138inline void 314INLINE void
139encode_ch (enc_t *enc, char ch) 315encode_ch (enc_t *enc, char ch)
140{ 316{
141 need (enc, 1); 317 need (enc, 1);
142 *enc->cur++ = ch; 318 *enc->cur++ = ch;
143} 319}
… …
197 { 373 {
198 uch = ch; 374 uch = ch;
199 clen = 1; 375 clen = 1;
200 } 376 }
201 377
202 if (uch > 0x10FFFFUL) 378 if (uch < 0x80/*0x20*/ || uch >= enc->limit)
203 croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
204
205 if (uch < 0x80 || enc->flags & F_ASCII || (enc->flags & F_LATIN1 && uch > 0xFF))
206 { 379 {
207 if (uch > 0xFFFFUL) 380 if (uch >= 0x10000UL)
208 { 381 {
382 if (uch >= 0x110000UL)
383 croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
384
209 need (enc, len += 11); 385 need (enc, len += 11);
210 sprintf (enc->cur, "\\u%04x\\u%04x", 386 sprintf (enc->cur, "\\u%04x\\u%04x",
211 (int)((uch - 0x10000) / 0x400 + 0xD800), 387 (int)((uch - 0x10000) / 0x400 + 0xD800),
212 (int)((uch - 0x10000) % 0x400 + 0xDC00)); 388 (int)((uch - 0x10000) % 0x400 + 0xDC00));
213 enc->cur += 12; 389 enc->cur += 12;
214 } 390 }
215 else 391 else
216 { 392 {
217 static char hexdigit [16] = "0123456789abcdef";
218 need (enc, len += 5); 393 need (enc, len += 5);
219 *enc->cur++ = '\\'; 394 *enc->cur++ = '\\';
220 *enc->cur++ = 'u'; 395 *enc->cur++ = 'u';
221 *enc->cur++ = hexdigit [ uch >> 12 ]; 396 *enc->cur++ = PL_hexdigit [ uch >> 12 ];
222 *enc->cur++ = hexdigit [(uch >> 8) & 15]; 397 *enc->cur++ = PL_hexdigit [(uch >> 8) & 15];
223 *enc->cur++ = hexdigit [(uch >> 4) & 15]; 398 *enc->cur++ = PL_hexdigit [(uch >> 4) & 15];
224 *enc->cur++ = hexdigit [(uch >> 0) & 15]; 399 *enc->cur++ = PL_hexdigit [(uch >> 0) & 15];
225 } 400 }
226 401
227 str += clen; 402 str += clen;
228 } 403 }
229 else if (enc->flags & F_LATIN1) 404 else if (enc->json.flags & F_LATIN1)
230 { 405 {
231 *enc->cur++ = uch; 406 *enc->cur++ = uch;
232 str += clen; 407 str += clen;
233 } 408 }
234 else if (is_utf8) 409 else if (is_utf8)
… …
241 while (--clen); 416 while (--clen);
242 } 417 }
243 else 418 else
244 { 419 {
245 need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed 420 need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed
246 enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0); 421 enc->cur = encode_utf8 (enc->cur, uch);
247 ++str; 422 ++str;
248 } 423 }
249 } 424 }
250 } 425 }
251 } 426 }
252 427
253 --len; 428 --len;
254 } 429 }
255} 430}
256 431
257inline void 432INLINE void
258encode_indent (enc_t *enc) 433encode_indent (enc_t *enc)
259{ 434{
260 if (enc->flags & F_INDENT) 435 if (enc->json.flags & F_INDENT)
261 { 436 {
262 int spaces = enc->indent * INDENT_STEP; 437 int spaces = enc->indent * INDENT_STEP;
263 438
264 need (enc, spaces); 439 need (enc, spaces);
265 memset (enc->cur, ' ', spaces); 440 memset (enc->cur, ' ', spaces);
266 enc->cur += spaces; 441 enc->cur += spaces;
267 } 442 }
268} 443}
269 444
270inline void 445INLINE void
271encode_space (enc_t *enc) 446encode_space (enc_t *enc)
272{ 447{
273 need (enc, 1); 448 need (enc, 1);
274 encode_ch (enc, ' '); 449 encode_ch (enc, ' ');
275} 450}
276 451
277inline void 452INLINE void
278encode_nl (enc_t *enc) 453encode_nl (enc_t *enc)
279{ 454{
280 if (enc->flags & F_INDENT) 455 if (enc->json.flags & F_INDENT)
281 { 456 {
282 need (enc, 1); 457 need (enc, 1);
283 encode_ch (enc, '\n'); 458 encode_ch (enc, '\n');
284 } 459 }
285} 460}
286 461
287inline void 462INLINE void
288encode_comma (enc_t *enc) 463encode_comma (enc_t *enc)
289{ 464{
290 encode_ch (enc, ','); 465 encode_ch (enc, ',');
291 466
292 if (enc->flags & F_INDENT) 467 if (enc->json.flags & F_INDENT)
293 encode_nl (enc); 468 encode_nl (enc);
294 else if (enc->flags & F_SPACE_AFTER) 469 else if (enc->json.flags & F_SPACE_AFTER)
295 encode_space (enc); 470 encode_space (enc);
296} 471}
297 472
298static void encode_sv (enc_t *enc, SV *sv); 473static void encode_sv (enc_t *enc, SV *sv);
299 474
300static void 475static void
301encode_av (enc_t *enc, AV *av) 476encode_av (enc_t *enc, AV *av)
302{ 477{
303 int i, len = av_len (av); 478 int i, len = av_len (av);
304 479
305 if (enc->indent >= enc->maxdepth) 480 if (enc->indent >= enc->json.max_depth)
306 croak ("data structure too deep (hit recursion limit)"); 481 croak (ERR_NESTING_EXCEEDED);
307 482
308 encode_ch (enc, '['); encode_nl (enc); 483 encode_ch (enc, '[');
309 ++enc->indent; 484
485 if (len >= 0)
486 {
487 encode_nl (enc); ++enc->indent;
310 488
311 for (i = 0; i <= len; ++i) 489 for (i = 0; i <= len; ++i)
312 { 490 {
491 SV **svp = av_fetch (av, i, 0);
492
313 encode_indent (enc); 493 encode_indent (enc);
314 encode_sv (enc, *av_fetch (av, i, 0));
315 494
495 if (svp)
496 encode_sv (enc, *svp);
497 else
498 encode_str (enc, "null", 4, 0);
499
316 if (i < len) 500 if (i < len)
317 encode_comma (enc); 501 encode_comma (enc);
318 } 502 }
319 503
504 encode_nl (enc); --enc->indent; encode_indent (enc);
505 }
506
320 encode_nl (enc); 507 encode_ch (enc, ']');
321
322 --enc->indent;
323 encode_indent (enc); encode_ch (enc, ']');
324} 508}
325 509
326static void 510static void
327encode_he (enc_t *enc, HE *he) 511encode_hk (enc_t *enc, HE *he)
328{ 512{
329 encode_ch (enc, '"'); 513 encode_ch (enc, '"');
330 514
331 if (HeKLEN (he) == HEf_SVKEY) 515 if (HeKLEN (he) == HEf_SVKEY)
332 { 516 {
… …
342 else 526 else
343 encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he)); 527 encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));
344 528
345 encode_ch (enc, '"'); 529 encode_ch (enc, '"');
346 530
347 if (enc->flags & F_SPACE_BEFORE) encode_space (enc); 531 if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);
348 encode_ch (enc, ':'); 532 encode_ch (enc, ':');
349 if (enc->flags & F_SPACE_AFTER ) encode_space (enc); 533 if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);
350 encode_sv (enc, HeVAL (he));
351} 534}
352 535
353// compare hash entries, used when all keys are bytestrings 536// compare hash entries, used when all keys are bytestrings
354static int 537static int
355he_cmp_fast (const void *a_, const void *b_) 538he_cmp_fast (const void *a_, const void *b_)
… …
360 HE *b = *(HE **)b_; 543 HE *b = *(HE **)b_;
361 544
362 STRLEN la = HeKLEN (a); 545 STRLEN la = HeKLEN (a);
363 STRLEN lb = HeKLEN (b); 546 STRLEN lb = HeKLEN (b);
364 547
365 if (!(cmp = memcmp (HeKEY (a), HeKEY (b), la < lb ? la : lb))) 548 if (!(cmp = memcmp (HeKEY (b), HeKEY (a), lb < la ? lb : la)))
366 cmp = la - lb; 549 cmp = lb - la;
367 550
368 return cmp; 551 return cmp;
369} 552}
370 553
371// compare hash entries, used when some keys are sv's or utf-x 554// compare hash entries, used when some keys are sv's or utf-x
372static int 555static int
373he_cmp_slow (const void *a, const void *b) 556he_cmp_slow (const void *a, const void *b)
374{ 557{
375 return sv_cmp (HeSVKEY_force (*(HE **)a), HeSVKEY_force (*(HE **)b)); 558 return sv_cmp (HeSVKEY_force (*(HE **)b), HeSVKEY_force (*(HE **)a));
376} 559}
377 560
378static void 561static void
379encode_hv (enc_t *enc, HV *hv) 562encode_hv (enc_t *enc, HV *hv)
380{ 563{
381 int count, i; 564 HE *he;
382 565
383 if (enc->indent >= enc->maxdepth) 566 if (enc->indent >= enc->json.max_depth)
384 croak ("data structure too deep (hit recursion limit)"); 567 croak (ERR_NESTING_EXCEEDED);
385 568
386 encode_ch (enc, '{'); encode_nl (enc); ++enc->indent; 569 encode_ch (enc, '{');
387 570
388 if ((count = hv_iterinit (hv)))
389 {
390 // for canonical output we have to sort by keys first 571 // for canonical output we have to sort by keys first
391 // actually, this is mostly due to the stupid so-called 572 // actually, this is mostly due to the stupid so-called
392 // security workaround added somewhere in 5.8.x. 573 // security workaround added somewhere in 5.8.x
393 // that randomises hash orderings 574 // that randomises hash orderings
394 if (enc->flags & F_CANONICAL) 575 if (enc->json.flags & F_CANONICAL && !SvRMAGICAL (hv))
576 {
577 int count = hv_iterinit (hv);
578
579 if (SvMAGICAL (hv))
395 { 580 {
581 // need to count by iterating. could improve by dynamically building the vector below
582 // but I don't care for the speed of this special case.
583 // note also that we will run into undefined behaviour when the two iterations
584 // do not result in the same count, something I might care for in some later release.
585
586 count = 0;
587 while (hv_iternext (hv))
588 ++count;
589
590 hv_iterinit (hv);
591 }
592
593 if (count)
594 {
396 int fast = 1; 595 int i, fast = 1;
397 HE *he;
398#if defined(__BORLANDC__) || defined(_MSC_VER) 596#if defined(__BORLANDC__) || defined(_MSC_VER)
399 HE **hes = _alloca (count * sizeof (HE)); 597 HE **hes = _alloca (count * sizeof (HE));
400#else 598#else
401 HE *hes [count]; // if your compiler dies here, you need to enable C99 mode 599 HE *hes [count]; // if your compiler dies here, you need to enable C99 mode
402#endif 600#endif
… …
429 627
430 FREETMPS; 628 FREETMPS;
431 LEAVE; 629 LEAVE;
432 } 630 }
433 631
434 for (i = 0; i < count; ++i) 632 encode_nl (enc); ++enc->indent;
633
634 while (count--)
435 { 635 {
436 encode_indent (enc); 636 encode_indent (enc);
637 he = hes [count];
437 encode_he (enc, hes [i]); 638 encode_hk (enc, he);
639 encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
438 640
439 if (i < count - 1) 641 if (count)
440 encode_comma (enc); 642 encode_comma (enc);
441 } 643 }
442 644
443 encode_nl (enc); 645 encode_nl (enc); --enc->indent; encode_indent (enc);
444 } 646 }
647 }
445 else 648 else
649 {
650 if (hv_iterinit (hv) || SvMAGICAL (hv))
651 if ((he = hv_iternext (hv)))
446 { 652 {
447 HE *he = hv_iternext (hv); 653 encode_nl (enc); ++enc->indent;
448 654
449 for (;;) 655 for (;;)
450 { 656 {
451 encode_indent (enc); 657 encode_indent (enc);
452 encode_he (enc, he); 658 encode_hk (enc, he);
659 encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
453 660
454 if (!(he = hv_iternext (hv))) 661 if (!(he = hv_iternext (hv)))
455 break; 662 break;
456 663
457 encode_comma (enc); 664 encode_comma (enc);
458 } 665 }
459 666
460 encode_nl (enc); 667 encode_nl (enc); --enc->indent; encode_indent (enc);
461 } 668 }
462 } 669 }
463 670
464 --enc->indent; encode_indent (enc); encode_ch (enc, '}'); 671 encode_ch (enc, '}');
465} 672}
466 673
467// encode objects, arrays and special \0=false and \1=true values. 674// encode objects, arrays and special \0=false and \1=true values.
468static void 675static void
469encode_rv (enc_t *enc, SV *sv) 676encode_rv (enc_t *enc, SV *sv)
… …
473 SvGETMAGIC (sv); 680 SvGETMAGIC (sv);
474 svt = SvTYPE (sv); 681 svt = SvTYPE (sv);
475 682
476 if (expect_false (SvOBJECT (sv))) 683 if (expect_false (SvOBJECT (sv)))
477 { 684 {
685 HV *stash = !JSON_SLOW || json_boolean_stash
686 ? json_boolean_stash
687 : gv_stashpv ("JSON::XS::Boolean", 1);
688
478 if (SvSTASH (sv) == json_boolean_stash) 689 if (SvSTASH (sv) == stash)
479 { 690 {
480 if (SvIV (sv) == 0) 691 if (SvIV (sv))
692 encode_str (enc, "true", 4, 0);
693 else
481 encode_str (enc, "false", 5, 0); 694 encode_str (enc, "false", 5, 0);
482 else
483 encode_str (enc, "true", 4, 0);
484 } 695 }
485 else 696 else
486 { 697 {
487#if 0 698#if 0
488 if (0 && sv_derived_from (rv, "JSON::Literal")) 699 if (0 && sv_derived_from (rv, "JSON::Literal"))
489 { 700 {
490 // not yet 701 // not yet
491 } 702 }
492#endif 703#endif
493 if (enc->flags & F_CONV_BLESSED) 704 if (enc->json.flags & F_CONV_BLESSED)
494 { 705 {
495 // we re-bless the reference to get overload and other niceties right 706 // we re-bless the reference to get overload and other niceties right
496 GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 1); 707 GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 0);
497 708
498 if (to_json) 709 if (to_json)
499 { 710 {
500 dSP; 711 dSP;
501 ENTER; 712
502 SAVETMPS;
503 PUSHMARK (SP); 713 ENTER; SAVETMPS; PUSHMARK (SP);
504 XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv))); 714 XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
505 715
506 // calling with G_SCALAR ensures that we always get a 1 reutrn value 716 // calling with G_SCALAR ensures that we always get a 1 return value
507 // check anyways.
508 PUTBACK; 717 PUTBACK;
509 assert (1 == call_sv ((SV *)GvCV (to_json), G_SCALAR)); 718 call_sv ((SV *)GvCV (to_json), G_SCALAR);
510 SPAGAIN; 719 SPAGAIN;
511 720
721 // catch this surprisingly common error
722 if (SvROK (TOPs) && SvRV (TOPs) == sv)
723 croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
724
725 sv = POPs;
726 PUTBACK;
727
512 encode_sv (enc, POPs); 728 encode_sv (enc, sv);
513 729
514 FREETMPS; 730 FREETMPS; LEAVE;
515 LEAVE;
516 } 731 }
517 else if (enc->flags & F_ALLOW_BLESSED) 732 else if (enc->json.flags & F_ALLOW_BLESSED)
518 encode_str (enc, "null", 4, 0); 733 encode_str (enc, "null", 4, 0);
519 else 734 else
520 croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it", 735 croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
521 SvPV_nolen (sv_2mortal (newRV_inc (sv)))); 736 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
522 } 737 }
523 else if (enc->flags & F_ALLOW_BLESSED) 738 else if (enc->json.flags & F_ALLOW_BLESSED)
524 encode_str (enc, "null", 4, 0); 739 encode_str (enc, "null", 4, 0);
525 else 740 else
526 croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled", 741 croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",
527 SvPV_nolen (sv_2mortal (newRV_inc (sv)))); 742 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
528 } 743 }
… …
531 encode_hv (enc, (HV *)sv); 746 encode_hv (enc, (HV *)sv);
532 else if (svt == SVt_PVAV) 747 else if (svt == SVt_PVAV)
533 encode_av (enc, (AV *)sv); 748 encode_av (enc, (AV *)sv);
534 else if (svt < SVt_PVAV) 749 else if (svt < SVt_PVAV)
535 { 750 {
536 if (SvNIOK (sv) && SvIV (sv) == 0) 751 STRLEN len = 0;
752 char *pv = svt ? SvPV (sv, len) : 0;
753
754 if (len == 1 && *pv == '1')
755 encode_str (enc, "true", 4, 0);
756 else if (len == 1 && *pv == '0')
537 encode_str (enc, "false", 5, 0); 757 encode_str (enc, "false", 5, 0);
538 else if (SvNIOK (sv) && SvIV (sv) == 1) 758 else if (enc->json.flags & F_ALLOW_UNKNOWN)
539 encode_str (enc, "true", 4, 0); 759 encode_str (enc, "null", 4, 0);
540 else 760 else
541 croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1", 761 croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
542 SvPV_nolen (sv_2mortal (newRV_inc (sv)))); 762 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
543 } 763 }
764 else if (enc->json.flags & F_ALLOW_UNKNOWN)
765 encode_str (enc, "null", 4, 0);
544 else 766 else
545 croak ("encountered %s, but JSON can only represent references to arrays or hashes", 767 croak ("encountered %s, but JSON can only represent references to arrays or hashes",
546 SvPV_nolen (sv_2mortal (newRV_inc (sv)))); 768 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
547} 769}
548 770
… …
566 Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur); 788 Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
567 enc->cur += strlen (enc->cur); 789 enc->cur += strlen (enc->cur);
568 } 790 }
569 else if (SvIOKp (sv)) 791 else if (SvIOKp (sv))
570 { 792 {
571 // we assume we can always read an IV as a UV 793 // we assume we can always read an IV as a UV and vice versa
572 if (SvUV (sv) & ~(UV)0x7fff) 794 // we assume two's complement
573 { 795 // we assume no aliasing issues in the union
574 // large integer, use the (rather slow) snprintf way. 796 if (SvIsUV (sv) ? SvUVX (sv) <= 59000
575 need (enc, sizeof (UV) * 3); 797 : SvIVX (sv) <= 59000 && SvIVX (sv) >= -59000)
576 enc->cur +=
577 SvIsUV(sv)
578 ? snprintf (enc->cur, sizeof (UV) * 3, "%"UVuf, (UV)SvUVX (sv))
579 : snprintf (enc->cur, sizeof (UV) * 3, "%"IVdf, (IV)SvIVX (sv));
580 }
581 else
582 { 798 {
583 // optimise the "small number case" 799 // optimise the "small number case"
584 // code will likely be branchless and use only a single multiplication 800 // code will likely be branchless and use only a single multiplication
801 // works for numbers up to 59074
585 I32 i = SvIV (sv); 802 I32 i = SvIVX (sv);
586 U32 u; 803 U32 u;
587 char digit, nz = 0; 804 char digit, nz = 0;
588 805
589 need (enc, 6); 806 need (enc, 6);
590 807
… …
596 813
597 // now output digit by digit, each time masking out the integer part 814 // now output digit by digit, each time masking out the integer part
598 // and multiplying by 5 while moving the decimal point one to the right, 815 // and multiplying by 5 while moving the decimal point one to the right,
599 // resulting in a net multiplication by 10. 816 // resulting in a net multiplication by 10.
600 // we always write the digit to memory but conditionally increment 817 // we always write the digit to memory but conditionally increment
601 // the pointer, to ease the usage of conditional move instructions. 818 // the pointer, to enable the use of conditional move instructions.
602 digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffff) * 5; 819 digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffffUL) * 5;
603 digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffff) * 5; 820 digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffffUL) * 5;
604 digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffff) * 5; 821 digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffffUL) * 5;
605 digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffff) * 5; 822 digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffffUL) * 5;
606 digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0' 823 digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
607 } 824 }
825 else
826 {
827 // large integer, use the (rather slow) snprintf way.
828 need (enc, IVUV_MAXCHARS);
829 enc->cur +=
830 SvIsUV(sv)
831 ? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv))
832 : snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv));
833 }
608 } 834 }
609 else if (SvROK (sv)) 835 else if (SvROK (sv))
610 encode_rv (enc, SvRV (sv)); 836 encode_rv (enc, SvRV (sv));
611 else if (!SvOK (sv)) 837 else if (!SvOK (sv) || enc->json.flags & F_ALLOW_UNKNOWN)
612 encode_str (enc, "null", 4, 0); 838 encode_str (enc, "null", 4, 0);
613 else 839 else
614 croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this", 840 croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",
615 SvPV_nolen (sv), SvFLAGS (sv)); 841 SvPV_nolen (sv), SvFLAGS (sv));
616} 842}
617 843
618static SV * 844static SV *
619encode_json (SV *scalar, U32 flags) 845encode_json (SV *scalar, JSON *json)
620{ 846{
621 enc_t enc; 847 enc_t enc;
622 848
623 if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar)) 849 if (!(json->flags & F_ALLOW_NONREF) && !SvROK (scalar))
624 croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)"); 850 croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
625 851
626 enc.flags = flags; 852 enc.json = *json;
627 enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); 853 enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
628 enc.cur = SvPVX (enc.sv); 854 enc.cur = SvPVX (enc.sv);
629 enc.end = SvEND (enc.sv); 855 enc.end = SvEND (enc.sv);
630 enc.indent = 0; 856 enc.indent = 0;
631 enc.maxdepth = DEC_DEPTH (flags); 857 enc.limit = enc.json.flags & F_ASCII ? 0x000080UL
858 : enc.json.flags & F_LATIN1 ? 0x000100UL
859 : 0x110000UL;
632 860
633 SvPOK_only (enc.sv); 861 SvPOK_only (enc.sv);
634 encode_sv (&enc, scalar); 862 encode_sv (&enc, scalar);
863 encode_nl (&enc);
635 864
636 SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); 865 SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
637 *SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings 866 *SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
638 867
639 if (!(flags & (F_ASCII | F_LATIN1 | F_UTF8))) 868 if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8)))
640 SvUTF8_on (enc.sv); 869 SvUTF8_on (enc.sv);
641 870
642 if (enc.flags & F_SHRINK) 871 if (enc.json.flags & F_SHRINK)
643 shrink (enc.sv); 872 shrink (enc.sv);
644 873
645 return enc.sv; 874 return enc.sv;
646} 875}
647 876
… …
652typedef struct 881typedef struct
653{ 882{
654 char *cur; // current parser pointer 883 char *cur; // current parser pointer
655 char *end; // end of input string 884 char *end; // end of input string
656 const char *err; // parse error, if != 0 885 const char *err; // parse error, if != 0
657 U32 flags; // F_* 886 JSON json;
658 U32 depth; // recursion depth 887 U32 depth; // recursion depth
659 U32 maxdepth; // recursion depth limit 888 U32 maxdepth; // recursion depth limit
660} dec_t; 889} dec_t;
661 890
662inline void 891INLINE void
892decode_comment (dec_t *dec)
893{
894 // only '#'-style comments allowed a.t.m.
895
896 while (*dec->cur && *dec->cur != 0x0a && *dec->cur != 0x0d)
897 ++dec->cur;
898}
899
900INLINE void
663decode_ws (dec_t *dec) 901decode_ws (dec_t *dec)
664{ 902{
665 for (;;) 903 for (;;)
666 { 904 {
667 char ch = *dec->cur; 905 char ch = *dec->cur;
668 906
669 if (ch > 0x20 907 if (ch > 0x20)
908 {
909 if (expect_false (ch == '#'))
910 {
911 if (dec->json.flags & F_RELAXED)
912 decode_comment (dec);
913 else
914 break;
915 }
916 else
917 break;
918 }
670 || (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)) 919 else if (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)
671 break; 920 break; // parse error, but let higher level handle it, gives better error messages
672 921
673 ++dec->cur; 922 ++dec->cur;
674 } 923 }
675} 924}
676 925
… …
680 if (*dec->cur != ch) \ 929 if (*dec->cur != ch) \
681 ERR (# ch " expected"); \ 930 ERR (# ch " expected"); \
682 ++dec->cur; \ 931 ++dec->cur; \
683 SE 932 SE
684 933
685#define DEC_INC_DEPTH if (++dec->depth > dec->maxdepth) ERR ("json datastructure exceeds maximum nesting level (set a higher max_depth)") 934#define DEC_INC_DEPTH if (++dec->depth > dec->json.max_depth) ERR (ERR_NESTING_EXCEEDED)
686#define DEC_DEC_DEPTH --dec->depth 935#define DEC_DEC_DEPTH --dec->depth
687 936
688static SV *decode_sv (dec_t *dec); 937static SV *decode_sv (dec_t *dec);
689 938
690static signed char decode_hexdigit[256]; 939static signed char decode_hexdigit[256];
… …
782 1031
783 if (hi >= 0x80) 1032 if (hi >= 0x80)
784 { 1033 {
785 utf8 = 1; 1034 utf8 = 1;
786 1035
787 cur = (char *)uvuni_to_utf8_flags (cur, hi, 0); 1036 cur = encode_utf8 (cur, hi);
788 } 1037 }
789 else 1038 else
790 *cur++ = hi; 1039 *cur++ = hi;
791 } 1040 }
792 break; 1041 break;
… …
794 default: 1043 default:
795 --dec_cur; 1044 --dec_cur;
796 ERR ("illegal backslash escape sequence in string"); 1045 ERR ("illegal backslash escape sequence in string");
797 } 1046 }
798 } 1047 }
799 else if (expect_true (ch >= 0x20 && ch <= 0x7f)) 1048 else if (expect_true (ch >= 0x20 && ch < 0x80))
800 *cur++ = ch; 1049 *cur++ = ch;
801 else if (ch >= 0x80) 1050 else if (ch >= 0x80)
802 { 1051 {
803 STRLEN clen; 1052 STRLEN clen;
804 UV uch;
805 1053
806 --dec_cur; 1054 --dec_cur;
807 1055
808 uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen); 1056 decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
809 if (clen == (STRLEN)-1) 1057 if (clen == (STRLEN)-1)
810 ERR ("malformed UTF-8 character in JSON string"); 1058 ERR ("malformed UTF-8 character in JSON string");
811 1059
812 do 1060 do
813 *cur++ = *dec_cur++; 1061 *cur++ = *dec_cur++;
… …
830 { 1078 {
831 STRLEN len = cur - buf; 1079 STRLEN len = cur - buf;
832 1080
833 if (sv) 1081 if (sv)
834 { 1082 {
835 SvGROW (sv, SvCUR (sv) + len + 1); 1083 STRLEN cur = SvCUR (sv);
1084
1085 if (SvLEN (sv) <= cur + len)
1086 SvGROW (sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
1087
836 memcpy (SvPVX (sv) + SvCUR (sv), buf, len); 1088 memcpy (SvPVX (sv) + SvCUR (sv), buf, len);
837 SvCUR_set (sv, SvCUR (sv) + len); 1089 SvCUR_set (sv, SvCUR (sv) + len);
838 } 1090 }
839 else 1091 else
840 sv = newSVpvn (buf, len); 1092 sv = newSVpvn (buf, len);
… …
925 is_nv = 1; 1177 is_nv = 1;
926 } 1178 }
927 1179
928 if (!is_nv) 1180 if (!is_nv)
929 { 1181 {
1182 int len = dec->cur - start;
1183
930 // special case the rather common 1..4-digit-int case, assumes 32 bit ints or so 1184 // special case the rather common 1..5-digit-int case
931 if (*start == '-') 1185 if (*start == '-')
932 switch (dec->cur - start) 1186 switch (len)
933 { 1187 {
934 case 2: return newSViv (-( start [1] - '0' * 1)); 1188 case 2: return newSViv (-(IV)( start [1] - '0' * 1));
935 case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11)); 1189 case 3: return newSViv (-(IV)( start [1] * 10 + start [2] - '0' * 11));
936 case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111)); 1190 case 4: return newSViv (-(IV)( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
937 case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111)); 1191 case 5: return newSViv (-(IV)( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
1192 case 6: return newSViv (-(IV)(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));
938 } 1193 }
939 else 1194 else
940 switch (dec->cur - start) 1195 switch (len)
941 { 1196 {
942 case 1: return newSViv ( start [0] - '0' * 1); 1197 case 1: return newSViv ( start [0] - '0' * 1);
943 case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11); 1198 case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
944 case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111); 1199 case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
945 case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111); 1200 case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
1201 case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);
946 } 1202 }
947 1203
948 { 1204 {
949 UV uv; 1205 UV uv;
950 int numtype = grok_number (start, dec->cur - start, &uv); 1206 int numtype = grok_number (start, len, &uv);
951 if (numtype & IS_NUMBER_IN_UV) 1207 if (numtype & IS_NUMBER_IN_UV)
952 if (numtype & IS_NUMBER_NEG) 1208 if (numtype & IS_NUMBER_NEG)
953 { 1209 {
954 if (uv < (UV)IV_MIN) 1210 if (uv < (UV)IV_MIN)
955 return newSViv (-(IV)uv); 1211 return newSViv (-(IV)uv);
956 } 1212 }
957 else 1213 else
958 return newSVuv (uv); 1214 return newSVuv (uv);
959
960 // here would likely be the place for bigint support
961 } 1215 }
962 }
963 1216
964 // if we ever support bigint or bigfloat, this is the place for bigfloat 1217 len -= *start == '-' ? 1 : 0;
1218
1219 // does not fit into IV or UV, try NV
1220 if (len <= NV_DIG)
1221 // fits into NV without loss of precision
1222 return newSVnv (json_atof (start));
1223
1224 // everything else fails, convert it to a string
1225 return newSVpvn (start, dec->cur - start);
1226 }
1227
1228 // loss of precision here
965 return newSVnv (Atof (start)); 1229 return newSVnv (json_atof (start));
966 1230
967fail: 1231fail:
968 return 0; 1232 return 0;
969} 1233}
970 1234
… …
999 1263
1000 if (*dec->cur != ',') 1264 if (*dec->cur != ',')
1001 ERR (", or ] expected while parsing array"); 1265 ERR (", or ] expected while parsing array");
1002 1266
1003 ++dec->cur; 1267 ++dec->cur;
1268
1269 decode_ws (dec);
1270
1271 if (*dec->cur == ']' && dec->json.flags & F_RELAXED)
1272 {
1273 ++dec->cur;
1274 break;
1275 }
1004 } 1276 }
1005 1277
1006 DEC_DEC_DEPTH; 1278 DEC_DEC_DEPTH;
1007 return newRV_noinc ((SV *)av); 1279 return newRV_noinc ((SV *)av);
1008 1280
… …
1013} 1285}
1014 1286
1015static SV * 1287static SV *
1016decode_hv (dec_t *dec) 1288decode_hv (dec_t *dec)
1017{ 1289{
1290 SV *sv;
1018 HV *hv = newHV (); 1291 HV *hv = newHV ();
1019 1292
1020 DEC_INC_DEPTH; 1293 DEC_INC_DEPTH;
1021 decode_ws (dec); 1294 decode_ws (dec);
1022 1295
1023 if (*dec->cur == '}') 1296 if (*dec->cur == '}')
1024 ++dec->cur; 1297 ++dec->cur;
1025 else 1298 else
1026 for (;;) 1299 for (;;)
1027 { 1300 {
1301 EXPECT_CH ('"');
1302
1303 // heuristic: assume that
1304 // a) decode_str + hv_store_ent are abysmally slow.
1305 // b) most hash keys are short, simple ascii text.
1306 // => try to "fast-match" such strings to avoid
1307 // the overhead of decode_str + hv_store_ent.
1308 {
1028 SV *key, *value; 1309 SV *value;
1310 char *p = dec->cur;
1311 char *e = p + 24; // only try up to 24 bytes
1029 1312
1030 decode_ws (dec); EXPECT_CH ('"'); 1313 for (;;)
1031
1032 key = decode_str (dec);
1033 if (!key)
1034 goto fail;
1035
1036 decode_ws (dec); EXPECT_CH (':');
1037
1038 value = decode_sv (dec);
1039 if (!value)
1040 { 1314 {
1315 // the >= 0x80 is false on most architectures
1316 if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
1317 {
1318 // slow path, back up and use decode_str
1319 SV *key = decode_str (dec);
1320 if (!key)
1321 goto fail;
1322
1323 decode_ws (dec); EXPECT_CH (':');
1324
1325 decode_ws (dec);
1326 value = decode_sv (dec);
1327 if (!value)
1328 {
1329 SvREFCNT_dec (key);
1330 goto fail;
1331 }
1332
1333 hv_store_ent (hv, key, value, 0);
1041 SvREFCNT_dec (key); 1334 SvREFCNT_dec (key);
1335
1336 break;
1337 }
1338 else if (*p == '"')
1339 {
1340 // fast path, got a simple key
1341 char *key = dec->cur;
1342 int len = p - key;
1343 dec->cur = p + 1;
1344
1345 decode_ws (dec); EXPECT_CH (':');
1346
1347 decode_ws (dec);
1348 value = decode_sv (dec);
1349 if (!value)
1042 goto fail; 1350 goto fail;
1351
1352 hv_store (hv, key, len, value, 0);
1353
1354 break;
1355 }
1356
1357 ++p;
1043 } 1358 }
1044 1359 }
1045 hv_store_ent (hv, key, value, 0);
1046 SvREFCNT_dec (key);
1047 1360
1048 decode_ws (dec); 1361 decode_ws (dec);
1049 1362
1050 if (*dec->cur == '}') 1363 if (*dec->cur == '}')
1051 { 1364 {
… …
1055 1368
1056 if (*dec->cur != ',') 1369 if (*dec->cur != ',')
1057 ERR (", or } expected while parsing object/hash"); 1370 ERR (", or } expected while parsing object/hash");
1058 1371
1059 ++dec->cur; 1372 ++dec->cur;
1373
1374 decode_ws (dec);
1375
1376 if (*dec->cur == '}' && dec->json.flags & F_RELAXED)
1377 {
1378 ++dec->cur;
1379 break;
1380 }
1060 } 1381 }
1061 1382
1062 DEC_DEC_DEPTH; 1383 DEC_DEC_DEPTH;
1063 return newRV_noinc ((SV *)hv); 1384 sv = newRV_noinc ((SV *)hv);
1385
1386 // check filter callbacks
1387 if (dec->json.flags & F_HOOK)
1388 {
1389 if (dec->json.cb_sk_object && HvKEYS (hv) == 1)
1390 {
1391 HE *cb, *he;
1392
1393 hv_iterinit (hv);
1394 he = hv_iternext (hv);
1395 hv_iterinit (hv);
1396
1397 // the next line creates a mortal sv each time its called.
1398 // might want to optimise this for common cases.
1399 cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);
1400
1401 if (cb)
1402 {
1403 dSP;
1404 int count;
1405
1406 ENTER; SAVETMPS; PUSHMARK (SP);
1407 XPUSHs (HeVAL (he));
1408 sv_2mortal (sv);
1409
1410 PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
1411
1412 if (count == 1)
1413 {
1414 sv = newSVsv (POPs);
1415 FREETMPS; LEAVE;
1416 return sv;
1417 }
1418
1419 SvREFCNT_inc (sv);
1420 FREETMPS; LEAVE;
1421 }
1422 }
1423
1424 if (dec->json.cb_object)
1425 {
1426 dSP;
1427 int count;
1428
1429 ENTER; SAVETMPS; PUSHMARK (SP);
1430 XPUSHs (sv_2mortal (sv));
1431
1432 PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;
1433
1434 if (count == 1)
1435 {
1436 sv = newSVsv (POPs);
1437 FREETMPS; LEAVE;
1438 return sv;
1439 }
1440
1441 SvREFCNT_inc (sv);
1442 FREETMPS; LEAVE;
1443 }
1444 }
1445
1446 return sv;
1064 1447
1065fail: 1448fail:
1066 SvREFCNT_dec (hv); 1449 SvREFCNT_dec (hv);
1067 DEC_DEC_DEPTH; 1450 DEC_DEC_DEPTH;
1068 return 0; 1451 return 0;
1069} 1452}
1070 1453
1071static SV * 1454static SV *
1072decode_sv (dec_t *dec) 1455decode_sv (dec_t *dec)
1073{ 1456{
1074 decode_ws (dec);
1075
1076 // the beauty of JSON: you need exactly one character lookahead 1457 // the beauty of JSON: you need exactly one character lookahead
1077 // to parse anything. 1458 // to parse everything.
1078 switch (*dec->cur) 1459 switch (*dec->cur)
1079 { 1460 {
1080 case '"': ++dec->cur; return decode_str (dec); 1461 case '"': ++dec->cur; return decode_str (dec);
1081 case '[': ++dec->cur; return decode_av (dec); 1462 case '[': ++dec->cur; return decode_av (dec);
1082 case '{': ++dec->cur; return decode_hv (dec); 1463 case '{': ++dec->cur; return decode_hv (dec);
1083 1464
1084 case '-': 1465 case '-':
1085 case '0': case '1': case '2': case '3': case '4': 1466 case '0': case '1': case '2': case '3': case '4':
1086 case '5': case '6': case '7': case '8': case '9': 1467 case '5': case '6': case '7': case '8': case '9':
1087 return decode_num (dec); 1468 return decode_num (dec);
1088 1469
1089 case 't': 1470 case 't':
1090 if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4)) 1471 if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
1091 { 1472 {
1092 dec->cur += 4; 1473 dec->cur += 4;
1474#if JSON_SLOW
1475 json_true = get_bool ("JSON::XS::true");
1476#endif
1093 return SvREFCNT_inc (json_true); 1477 return newSVsv (json_true);
1094 } 1478 }
1095 else 1479 else
1096 ERR ("'true' expected"); 1480 ERR ("'true' expected");
1097 1481
1098 break; 1482 break;
1099 1483
1100 case 'f': 1484 case 'f':
1101 if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5)) 1485 if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
1102 { 1486 {
1103 dec->cur += 5; 1487 dec->cur += 5;
1488#if JSON_SLOW
1489 json_false = get_bool ("JSON::XS::false");
1490#endif
1104 return SvREFCNT_inc (json_false); 1491 return newSVsv (json_false);
1105 } 1492 }
1106 else 1493 else
1107 ERR ("'false' expected"); 1494 ERR ("'false' expected");
1108 1495
1109 break; 1496 break;
… …
1127fail: 1514fail:
1128 return 0; 1515 return 0;
1129} 1516}
1130 1517
1131static SV * 1518static SV *
1132decode_json (SV *string, U32 flags, UV *offset_return) 1519decode_json (SV *string, JSON *json, char **offset_return)
1133{ 1520{
1134 dec_t dec; 1521 dec_t dec;
1135 UV offset;
1136 SV *sv; 1522 SV *sv;
1137 1523
1524 /* work around bugs in 5.10 where manipulating magic values
1525 * will perl ignore the magic in subsequent accesses
1526 */
1138 SvGETMAGIC (string); 1527 /*SvGETMAGIC (string);*/
1528 if (SvMAGICAL (string))
1529 string = sv_2mortal (newSVsv (string));
1530
1139 SvUPGRADE (string, SVt_PV); 1531 SvUPGRADE (string, SVt_PV);
1140 1532
1141 if (flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (flags)) 1533 /* work around a bug in perl 5.10, which causes SvCUR to fail an
1534 * assertion with -DDEBUGGING, although SvCUR is documented to
1535 * return the xpv_cur field which certainly exists after upgrading.
1536 * according to nicholas clark, calling SvPOK fixes this.
1537 * But it doesn't fix it, so try another workaround, call SvPV_nolen
1538 * and hope for the best.
1539 * Damnit, SvPV_nolen still trips over yet another assertion. This
1540 * assertion business is seriously broken, try yet another workaround
1541 * for the broken -DDEBUGGING.
1542 */
1543 {
1544#ifdef DEBUGGING
1545 STRLEN offset = SvOK (string) ? sv_len (string) : 0;
1546#else
1547 STRLEN offset = SvCUR (string);
1548#endif
1549
1550 if (offset > json->max_size && json->max_size)
1142 croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu", 1551 croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
1143 (unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (flags)); 1552 (unsigned long)SvCUR (string), (unsigned long)json->max_size);
1553 }
1144 1554
1145 if (flags & F_UTF8) 1555 if (DECODE_WANTS_OCTETS (json))
1146 sv_utf8_downgrade (string, 0); 1556 sv_utf8_downgrade (string, 0);
1147 else 1557 else
1148 sv_utf8_upgrade (string); 1558 sv_utf8_upgrade (string);
1149 1559
1150 SvGROW (string, SvCUR (string) + 1); // should basically be a NOP 1560 SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
1151 1561
1152 dec.flags = flags; 1562 dec.json = *json;
1153 dec.cur = SvPVX (string); 1563 dec.cur = SvPVX (string);
1154 dec.end = SvEND (string); 1564 dec.end = SvEND (string);
1155 dec.err = 0; 1565 dec.err = 0;
1156 dec.depth = 0; 1566 dec.depth = 0;
1157 dec.maxdepth = DEC_DEPTH (dec.flags); 1567
1568 if (dec.json.cb_object || dec.json.cb_sk_object)
1569 dec.json.flags |= F_HOOK;
1158 1570
1159 *dec.end = 0; // this should basically be a nop, too, but make sure it's there 1571 *dec.end = 0; // this should basically be a nop, too, but make sure it's there
1572
1573 decode_ws (&dec);
1160 sv = decode_sv (&dec); 1574 sv = decode_sv (&dec);
1575
1576 if (offset_return)
1577 *offset_return = dec.cur;
1161 1578
1162 if (!(offset_return || !sv)) 1579 if (!(offset_return || !sv))
1163 { 1580 {
1164 // check for trailing garbage 1581 // check for trailing garbage
1165 decode_ws (&dec); 1582 decode_ws (&dec);
… …
1168 { 1585 {
1169 dec.err = "garbage after JSON object"; 1586 dec.err = "garbage after JSON object";
1170 SvREFCNT_dec (sv); 1587 SvREFCNT_dec (sv);
1171 sv = 0; 1588 sv = 0;
1172 } 1589 }
1173 }
1174
1175 if (offset_return || !sv)
1176 {
1177 offset = dec.flags & F_UTF8
1178 ? dec.cur - SvPVX (string)
1179 : utf8_distance (dec.cur, SvPVX (string));
1180
1181 if (offset_return)
1182 *offset_return = offset;
1183 } 1590 }
1184 1591
1185 if (!sv) 1592 if (!sv)
1186 { 1593 {
1187 SV *uni = sv_newmortal (); 1594 SV *uni = sv_newmortal ();
… …
1193 SAVEVPTR (PL_curcop); 1600 SAVEVPTR (PL_curcop);
1194 PL_curcop = &cop; 1601 PL_curcop = &cop;
1195 pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ); 1602 pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);
1196 LEAVE; 1603 LEAVE;
1197 1604
1198 croak ("%s, at character offset %d [\"%s\"]", 1605 croak ("%s, at character offset %d (before \"%s\")",
1199 dec.err, 1606 dec.err,
1200 (int)offset, 1607 ptr_to_index (string, dec.cur),
1201 dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)"); 1608 dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
1202 } 1609 }
1203 1610
1204 sv = sv_2mortal (sv); 1611 sv = sv_2mortal (sv);
1205 1612
1206 if (!(dec.flags & F_ALLOW_NONREF) && !SvROK (sv)) 1613 if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))
1207 croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)"); 1614 croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
1208 1615
1209 return sv; 1616 return sv;
1617}
1618
1619/////////////////////////////////////////////////////////////////////////////
1620// incremental parser
1621
1622static void
1623incr_parse (JSON *self)
1624{
1625 const char *p = SvPVX (self->incr_text) + self->incr_pos;
1626
1627 // the state machine here is a bit convoluted and could be simplified a lot
1628 // but this would make it slower, so...
1629
1630 for (;;)
1631 {
1632 //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
1633 switch (self->incr_mode)
1634 {
1635 // only used for initial whitespace skipping
1636 case INCR_M_WS:
1637 for (;;)
1638 {
1639 if (*p > 0x20)
1640 {
1641 if (*p == '#')
1642 {
1643 self->incr_mode = INCR_M_C0;
1644 goto incr_m_c;
1645 }
1646 else
1647 {
1648 self->incr_mode = INCR_M_JSON;
1649 goto incr_m_json;
1650 }
1651 }
1652 else if (!*p)
1653 goto interrupt;
1654
1655 ++p;
1656 }
1657
1658 // skip a single char inside a string (for \\-processing)
1659 case INCR_M_BS:
1660 if (!*p)
1661 goto interrupt;
1662
1663 ++p;
1664 self->incr_mode = INCR_M_STR;
1665 goto incr_m_str;
1666
1667 // inside #-style comments
1668 case INCR_M_C0:
1669 case INCR_M_C1:
1670 incr_m_c:
1671 for (;;)
1672 {
1673 if (*p == '\n')
1674 {
1675 self->incr_mode = self->incr_mode == INCR_M_C0 ? INCR_M_WS : INCR_M_JSON;
1676 break;
1677 }
1678 else if (!*p)
1679 goto interrupt;
1680
1681 ++p;
1682 }
1683
1684 break;
1685
1686 // inside a string
1687 case INCR_M_STR:
1688 incr_m_str:
1689 for (;;)
1690 {
1691 if (*p == '"')
1692 {
1693 ++p;
1694 self->incr_mode = INCR_M_JSON;
1695
1696 if (!self->incr_nest)
1697 goto interrupt;
1698
1699 goto incr_m_json;
1700 }
1701 else if (*p == '\\')
1702 {
1703 ++p; // "virtually" consumes character after \
1704
1705 if (!*p) // if at end of string we have to switch modes
1706 {
1707 self->incr_mode = INCR_M_BS;
1708 goto interrupt;
1709 }
1710 }
1711 else if (!*p)
1712 goto interrupt;
1713
1714 ++p;
1715 }
1716
1717 // after initial ws, outside string
1718 case INCR_M_JSON:
1719 incr_m_json:
1720 for (;;)
1721 {
1722 switch (*p++)
1723 {
1724 case 0:
1725 --p;
1726 goto interrupt;
1727
1728 case 0x09:
1729 case 0x0a:
1730 case 0x0d:
1731 case 0x20:
1732 if (!self->incr_nest)
1733 {
1734 --p; // do not eat the whitespace, let the next round do it
1735 goto interrupt;
1736 }
1737 break;
1738
1739 case '"':
1740 self->incr_mode = INCR_M_STR;
1741 goto incr_m_str;
1742
1743 case '[':
1744 case '{':
1745 if (++self->incr_nest > self->max_depth)
1746 croak (ERR_NESTING_EXCEEDED);
1747 break;
1748
1749 case ']':
1750 case '}':
1751 if (--self->incr_nest <= 0)
1752 goto interrupt;
1753 break;
1754
1755 case '#':
1756 self->incr_mode = INCR_M_C1;
1757 goto incr_m_c;
1758 }
1759 }
1760 }
1761
1762 modechange:
1763 ;
1764 }
1765
1766interrupt:
1767 self->incr_pos = p - SvPVX (self->incr_text);
1768 //printf ("interrupt<%.*s>\n", self->incr_pos, SvPVX(self->incr_text));//D
1769 //printf ("return pos %d mode %d nest %d\n", self->incr_pos, self->incr_mode, self->incr_nest);//D
1210} 1770}
1211 1771
1212///////////////////////////////////////////////////////////////////////////// 1772/////////////////////////////////////////////////////////////////////////////
1213// XS interface functions 1773// XS interface functions
1214 1774
… …
1226 : -1; 1786 : -1;
1227 1787
1228 json_stash = gv_stashpv ("JSON::XS" , 1); 1788 json_stash = gv_stashpv ("JSON::XS" , 1);
1229 json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1); 1789 json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);
1230 1790
1231 json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true ); 1791 json_true = get_bool ("JSON::XS::true");
1232 json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false); 1792 json_false = get_bool ("JSON::XS::false");
1793
1794 CvNODEBUG_on (get_cv ("JSON::XS::incr_text", 0)); /* the debugger completely breaks lvalue subs */
1233} 1795}
1234 1796
1235PROTOTYPES: DISABLE 1797PROTOTYPES: DISABLE
1236 1798
1237SV *new (char *dummy) 1799void CLONE (...)
1238 CODE: 1800 CODE:
1239 RETVAL = sv_bless (newRV_noinc (newSVuv (F_DEFAULT)), json_stash); 1801 json_stash = 0;
1240 OUTPUT: 1802 json_boolean_stash = 0;
1241 RETVAL
1242 1803
1804void new (char *klass)
1805 PPCODE:
1806{
1807 SV *pv = NEWSV (0, sizeof (JSON));
1808 SvPOK_only (pv);
1809 json_init ((JSON *)SvPVX (pv));
1810 XPUSHs (sv_2mortal (sv_bless (
1811 newRV_noinc (pv),
1812 strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)
1813 )));
1814}
1815
1243SV *ascii (SV *self, int enable = 1) 1816void ascii (JSON *self, int enable = 1)
1244 ALIAS: 1817 ALIAS:
1245 ascii = F_ASCII 1818 ascii = F_ASCII
1246 latin1 = F_LATIN1 1819 latin1 = F_LATIN1
1247 utf8 = F_UTF8 1820 utf8 = F_UTF8
1248 indent = F_INDENT 1821 indent = F_INDENT
… …
1252 pretty = F_PRETTY 1825 pretty = F_PRETTY
1253 allow_nonref = F_ALLOW_NONREF 1826 allow_nonref = F_ALLOW_NONREF
1254 shrink = F_SHRINK 1827 shrink = F_SHRINK
1255 allow_blessed = F_ALLOW_BLESSED 1828 allow_blessed = F_ALLOW_BLESSED
1256 convert_blessed = F_CONV_BLESSED 1829 convert_blessed = F_CONV_BLESSED
1830 relaxed = F_RELAXED
1831 allow_unknown = F_ALLOW_UNKNOWN
1832 PPCODE:
1833{
1834 if (enable)
1835 self->flags |= ix;
1836 else
1837 self->flags &= ~ix;
1838
1839 XPUSHs (ST (0));
1840}
1841
1842void get_ascii (JSON *self)
1843 ALIAS:
1844 get_ascii = F_ASCII
1845 get_latin1 = F_LATIN1
1846 get_utf8 = F_UTF8
1847 get_indent = F_INDENT
1848 get_canonical = F_CANONICAL
1849 get_space_before = F_SPACE_BEFORE
1850 get_space_after = F_SPACE_AFTER
1851 get_allow_nonref = F_ALLOW_NONREF
1852 get_shrink = F_SHRINK
1853 get_allow_blessed = F_ALLOW_BLESSED
1854 get_convert_blessed = F_CONV_BLESSED
1855 get_relaxed = F_RELAXED
1856 get_allow_unknown = F_ALLOW_UNKNOWN
1857 PPCODE:
1858 XPUSHs (boolSV (self->flags & ix));
1859
1860void max_depth (JSON *self, U32 max_depth = 0x80000000UL)
1861 PPCODE:
1862 self->max_depth = max_depth;
1863 XPUSHs (ST (0));
1864
1865U32 get_max_depth (JSON *self)
1257 CODE: 1866 CODE:
1258{ 1867 RETVAL = self->max_depth;
1259 UV *uv = SvJSON (self);
1260 if (enable)
1261 *uv |= ix;
1262 else
1263 *uv &= ~ix;
1264
1265 RETVAL = newSVsv (self);
1266}
1267 OUTPUT: 1868 OUTPUT:
1268 RETVAL 1869 RETVAL
1269 1870
1270SV *max_depth (SV *self, UV max_depth = 0x80000000UL) 1871void max_size (JSON *self, U32 max_size = 0)
1872 PPCODE:
1873 self->max_size = max_size;
1874 XPUSHs (ST (0));
1875
1876int get_max_size (JSON *self)
1271 CODE: 1877 CODE:
1272{ 1878 RETVAL = self->max_size;
1273 UV *uv = SvJSON (self);
1274 UV log2 = 0;
1275
1276 if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;
1277
1278 while ((1UL << log2) < max_depth)
1279 ++log2;
1280
1281 *uv = *uv & ~F_MAXDEPTH | (log2 << S_MAXDEPTH);
1282
1283 RETVAL = newSVsv (self);
1284}
1285 OUTPUT: 1879 OUTPUT:
1286 RETVAL 1880 RETVAL
1287 1881
1288SV *max_size (SV *self, UV max_size = 0) 1882void filter_json_object (JSON *self, SV *cb = &PL_sv_undef)
1883 PPCODE:
1884{
1885 SvREFCNT_dec (self->cb_object);
1886 self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;
1887
1888 XPUSHs (ST (0));
1889}
1890
1891void filter_json_single_key_object (JSON *self, SV *key, SV *cb = &PL_sv_undef)
1892 PPCODE:
1893{
1894 if (!self->cb_sk_object)
1895 self->cb_sk_object = newHV ();
1896
1897 if (SvOK (cb))
1898 hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1899 else
1900 {
1901 hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1902
1903 if (!HvKEYS (self->cb_sk_object))
1904 {
1905 SvREFCNT_dec (self->cb_sk_object);
1906 self->cb_sk_object = 0;
1907 }
1908 }
1909
1910 XPUSHs (ST (0));
1911}
1912
1913void encode (JSON *self, SV *scalar)
1914 PPCODE:
1915 XPUSHs (encode_json (scalar, self));
1916
1917void decode (JSON *self, SV *jsonstr)
1918 PPCODE:
1919 XPUSHs (decode_json (jsonstr, self, 0));
1920
1921void decode_prefix (JSON *self, SV *jsonstr)
1922 PPCODE:
1923{
1924 char *offset;
1925 EXTEND (SP, 2);
1926 PUSHs (decode_json (jsonstr, self, &offset));
1927 PUSHs (sv_2mortal (newSVuv (ptr_to_index (jsonstr, offset))));
1928}
1929
1930void incr_parse (JSON *self, SV *jsonstr = 0)
1931 PPCODE:
1932{
1933 if (!self->incr_text)
1934 self->incr_text = newSVpvn ("", 0);
1935
1936 /* if utf8-ness doesn't match the decoder, need to upgrade/downgrade */
1937 if (!DECODE_WANTS_OCTETS (self) == !SvUTF8 (self->incr_text))
1938 if (DECODE_WANTS_OCTETS (self))
1939 {
1940 if (self->incr_pos)
1941 self->incr_pos = utf8_length ((U8 *)SvPVX (self->incr_text),
1942 (U8 *)SvPVX (self->incr_text) + self->incr_pos);
1943
1944 sv_utf8_downgrade (self->incr_text, 0);
1945 }
1946 else
1947 {
1948 sv_utf8_upgrade (self->incr_text);
1949
1950 if (self->incr_pos)
1951 self->incr_pos = utf8_hop ((U8 *)SvPVX (self->incr_text), self->incr_pos)
1952 - (U8 *)SvPVX (self->incr_text);
1953 }
1954
1955 // append data, if any
1956 if (jsonstr)
1957 {
1958 /* make sure both strings have same encoding */
1959 if (SvUTF8 (jsonstr) != SvUTF8 (self->incr_text))
1960 if (SvUTF8 (jsonstr))
1961 sv_utf8_downgrade (jsonstr, 0);
1962 else
1963 sv_utf8_upgrade (jsonstr);
1964
1965 /* and then just blindly append */
1966 {
1967 STRLEN len;
1968 const char *str = SvPV (jsonstr, len);
1969 STRLEN cur = SvCUR (self->incr_text);
1970
1971 if (SvLEN (self->incr_text) <= cur + len)
1972 SvGROW (self->incr_text, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
1973
1974 Move (str, SvEND (self->incr_text), len, char);
1975 SvCUR_set (self->incr_text, SvCUR (self->incr_text) + len);
1976 *SvEND (self->incr_text) = 0; // this should basically be a nop, too, but make sure it's there
1977 }
1978 }
1979
1980 if (GIMME_V != G_VOID)
1981 do
1982 {
1983 char *offset;
1984
1985 if (!INCR_DONE (self))
1986 {
1987 incr_parse (self);
1988
1989 if (self->incr_pos > self->max_size && self->max_size)
1990 croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
1991 (unsigned long)self->incr_pos, (unsigned long)self->max_size);
1992
1993 if (!INCR_DONE (self))
1994 break;
1995 }
1996
1997 XPUSHs (decode_json (self->incr_text, self, &offset));
1998
1999 self->incr_pos -= offset - SvPVX (self->incr_text);
2000 self->incr_nest = 0;
2001 self->incr_mode = 0;
2002
2003 sv_chop (self->incr_text, offset);
2004 }
2005 while (GIMME_V == G_ARRAY);
2006}
2007
2008SV *incr_text (JSON *self)
2009 ATTRS: lvalue
1289 CODE: 2010 CODE:
1290{ 2011{
1291 UV *uv = SvJSON (self); 2012 if (self->incr_pos)
1292 UV log2 = 0; 2013 croak ("incr_text can not be called when the incremental parser already started parsing");
1293 2014
1294 if (max_size > 0x80000000UL) max_size = 0x80000000UL; 2015 RETVAL = self->incr_text ? SvREFCNT_inc (self->incr_text) : &PL_sv_undef;
1295 if (max_size == 1) max_size = 2;
1296
1297 while ((1UL << log2) < max_size)
1298 ++log2;
1299
1300 *uv = *uv & ~F_MAXSIZE | (log2 << S_MAXSIZE);
1301
1302 RETVAL = newSVsv (self);
1303} 2016}
1304 OUTPUT: 2017 OUTPUT:
1305 RETVAL 2018 RETVAL
1306 2019
2020void incr_skip (JSON *self)
2021 CODE:
2022{
2023 if (self->incr_pos)
2024 {
2025 sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + self->incr_pos);
2026 self->incr_pos = 0;
2027 self->incr_nest = 0;
2028 self->incr_mode = 0;
2029 }
2030}
2031
2032void incr_reset (JSON *self)
2033 CODE:
2034{
2035 SvREFCNT_dec (self->incr_text);
2036 self->incr_text = 0;
2037 self->incr_pos = 0;
2038 self->incr_nest = 0;
2039 self->incr_mode = 0;
2040}
2041
2042void DESTROY (JSON *self)
2043 CODE:
2044 SvREFCNT_dec (self->cb_sk_object);
2045 SvREFCNT_dec (self->cb_object);
2046 SvREFCNT_dec (self->incr_text);
2047
2048PROTOTYPES: ENABLE
2049
1307void encode (SV *self, SV *scalar) 2050void encode_json (SV *scalar)
2051 ALIAS:
2052 to_json_ = 0
2053 encode_json = F_UTF8
1308 PPCODE: 2054 PPCODE:
2055{
2056 JSON json;
2057 json_init (&json);
2058 json.flags |= ix;
1309 XPUSHs (encode_json (scalar, *SvJSON (self))); 2059 XPUSHs (encode_json (scalar, &json));
2060}
1310 2061
1311void decode (SV *self, SV *jsonstr) 2062void decode_json (SV *jsonstr)
2063 ALIAS:
2064 from_json_ = 0
2065 decode_json = F_UTF8
1312 PPCODE: 2066 PPCODE:
2067{
2068 JSON json;
2069 json_init (&json);
2070 json.flags |= ix;
1313 XPUSHs (decode_json (jsonstr, *SvJSON (self), 0)); 2071 XPUSHs (decode_json (jsonstr, &json, 0));
1314
1315void decode_prefix (SV *self, SV *jsonstr)
1316 PPCODE:
1317{
1318 UV offset;
1319 EXTEND (SP, 2);
1320 PUSHs (decode_json (jsonstr, *SvJSON (self), &offset));
1321 PUSHs (sv_2mortal (newSVuv (offset)));
1322} 2072}
1323 2073
1324PROTOTYPES: ENABLE
1325
1326void to_json (SV *scalar)
1327 ALIAS:
1328 objToJson = 0
1329 PPCODE:
1330 XPUSHs (encode_json (scalar, F_DEFAULT | F_UTF8));
1331
1332void from_json (SV *jsonstr)
1333 ALIAS:
1334 jsonToObj = 0
1335 PPCODE:
1336 XPUSHs (decode_json (jsonstr, F_DEFAULT | F_UTF8, 0));
1337

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