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Comparing JSON-XS/XS.xs (file contents):
Revision 1.38 by root, Mon Jun 11 03:18:07 2007 UTC vs.
Revision 1.103 by root, Wed Jan 6 08:01:39 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
16// some old perls do not have this, try to make it work, no
17// guarantees, though. if it breaks, you get to keep the pieces.
18#ifndef UTF8_MAXBYTES
19# define UTF8_MAXBYTES 13
20#endif
21
22// three extra for rounding, sign, and end of string
23#define IVUV_MAXCHARS (sizeof (UV) * CHAR_BIT * 28 / 93 + 3)
24
14#define F_ASCII 0x00000001UL 25#define F_ASCII 0x00000001UL
15#define F_LATIN1 0x00000002UL 26#define F_LATIN1 0x00000002UL
16#define F_UTF8 0x00000004UL 27#define F_UTF8 0x00000004UL
17#define F_INDENT 0x00000008UL 28#define F_INDENT 0x00000008UL
18#define F_CANONICAL 0x00000010UL 29#define F_CANONICAL 0x00000010UL
19#define F_SPACE_BEFORE 0x00000020UL 30#define F_SPACE_BEFORE 0x00000020UL
20#define F_SPACE_AFTER 0x00000040UL 31#define F_SPACE_AFTER 0x00000040UL
21#define F_ALLOW_NONREF 0x00000100UL 32#define F_ALLOW_NONREF 0x00000100UL
22#define F_SHRINK 0x00000200UL 33#define F_SHRINK 0x00000200UL
34#define F_ALLOW_BLESSED 0x00000400UL
35#define F_CONV_BLESSED 0x00000800UL
23#define F_MAXDEPTH 0xf8000000UL 36#define F_RELAXED 0x00001000UL
24#define S_MAXDEPTH 27 37#define F_ALLOW_UNKNOWN 0x00002000UL
25 38#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
26#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
27
28// F_SELFCONVERT? <=> to_json/toJson
29// F_BLESSED? <=> { $__class__$ => }
30 39
31#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER 40#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER
32#define F_DEFAULT (9UL << S_MAXDEPTH)
33 41
34#define INIT_SIZE 32 // initial scalar size to be allocated 42#define INIT_SIZE 32 // initial scalar size to be allocated
35#define INDENT_STEP 3 // spaces per indentation level 43#define INDENT_STEP 3 // spaces per indentation level
36 44
37#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
38 46
39#define SB do { 47#define SB do {
40#define SE } while (0) 48#define SE } while (0)
41 49
42#if __GNUC__ >= 3 50#if __GNUC__ >= 3
43# define expect(expr,value) __builtin_expect ((expr),(value)) 51# define expect(expr,value) __builtin_expect ((expr), (value))
44# define inline inline 52# define INLINE static inline
45#else 53#else
46# define expect(expr,value) (expr) 54# define expect(expr,value) (expr)
47# define inline static 55# define INLINE static
48#endif 56#endif
49 57
50#define expect_false(expr) expect ((expr) != 0, 0) 58#define expect_false(expr) expect ((expr) != 0, 0)
51#define expect_true(expr) expect ((expr) != 0, 1) 59#define expect_true(expr) expect ((expr) != 0, 1)
52 60
61#define IN_RANGE_INC(type,val,beg,end) \
62 ((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
63 <= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
64
65#define ERR_NESTING_EXCEEDED "json text or perl structure exceeds maximum nesting level (max_depth set too low?)"
66
67#ifdef USE_ITHREADS
68# define JSON_SLOW 1
69# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1))
70#else
71# define JSON_SLOW 0
72# define JSON_STASH json_stash
73#endif
74
53static HV *json_stash; // JSON::XS:: 75static HV *json_stash, *json_boolean_stash; // JSON::XS::
76static SV *json_true, *json_false;
77
78enum {
79 INCR_M_WS = 0, // initial whitespace skipping, must be 0
80 INCR_M_STR, // inside string
81 INCR_M_BS, // inside backslash
82 INCR_M_C0, // inside comment in initial whitespace sequence
83 INCR_M_C1, // inside comment in other places
84 INCR_M_JSON // outside anything, count nesting
85};
86
87#define INCR_DONE(json) ((json)->incr_nest <= 0 && (json)->incr_mode == INCR_M_JSON)
88
89typedef struct {
90 U32 flags;
91 U32 max_depth;
92 STRLEN max_size;
93
94 SV *cb_object;
95 HV *cb_sk_object;
96
97 // for the incremental parser
98 SV *incr_text; // the source text so far
99 STRLEN incr_pos; // the current offset into the text
100 int incr_nest; // {[]}-nesting level
101 unsigned char incr_mode;
102} JSON;
103
104INLINE void
105json_init (JSON *json)
106{
107 Zero (json, 1, JSON);
108 json->max_depth = 512;
109}
54 110
55///////////////////////////////////////////////////////////////////////////// 111/////////////////////////////////////////////////////////////////////////////
56// utility functions 112// utility functions
57 113
58static UV * 114INLINE SV *
59SvJSON (SV *sv) 115get_bool (const char *name)
60{ 116{
61 if (!(SvROK (sv) && SvOBJECT (SvRV (sv)) && SvSTASH (SvRV (sv)) == json_stash)) 117 SV *sv = get_sv (name, 1);
62 croak ("object is not of type JSON::XS");
63 118
64 return &SvUVX (SvRV (sv)); 119 SvREADONLY_on (sv);
65} 120 SvREADONLY_on (SvRV (sv));
66 121
67static void 122 return sv;
123}
124
125INLINE void
68shrink (SV *sv) 126shrink (SV *sv)
69{ 127{
70 sv_utf8_downgrade (sv, 1); 128 sv_utf8_downgrade (sv, 1);
129
71 if (SvLEN (sv) > SvCUR (sv) + 1) 130 if (SvLEN (sv) > SvCUR (sv) + 1)
72 { 131 {
73#ifdef SvPV_shrink_to_cur 132#ifdef SvPV_shrink_to_cur
74 SvPV_shrink_to_cur (sv); 133 SvPV_shrink_to_cur (sv);
75#elif defined (SvPV_renew) 134#elif defined (SvPV_renew)
… …
81// decode an utf-8 character and return it, or (UV)-1 in 140// decode an utf-8 character and return it, or (UV)-1 in
82// case of an error. 141// case of an error.
83// we special-case "safe" characters from U+80 .. U+7FF, 142// we special-case "safe" characters from U+80 .. U+7FF,
84// but use the very good perl function to parse anything else. 143// but use the very good perl function to parse anything else.
85// note that we never call this function for a ascii codepoints 144// note that we never call this function for a ascii codepoints
86inline UV 145INLINE UV
87decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen) 146decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)
88{ 147{
89 if (expect_false (s[0] > 0xdf || s[0] < 0xc2)) 148 if (expect_true (len >= 2
90 return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY); 149 && IN_RANGE_INC (char, s[0], 0xc2, 0xdf)
91 else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf) 150 && IN_RANGE_INC (char, s[1], 0x80, 0xbf)))
92 { 151 {
93 *clen = 2; 152 *clen = 2;
94 return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f); 153 return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);
95 } 154 }
96 else 155 else
97 { 156 return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);
98 *clen = (STRLEN)-1; 157}
99 return (UV)-1; 158
100 } 159// likewise for encoding, also never called for ascii codepoints
160// this function takes advantage of this fact, although current gccs
161// seem to optimise the check for >= 0x80 away anyways
162INLINE unsigned char *
163encode_utf8 (unsigned char *s, UV ch)
164{
165 if (expect_false (ch < 0x000080))
166 *s++ = ch;
167 else if (expect_true (ch < 0x000800))
168 *s++ = 0xc0 | ( ch >> 6),
169 *s++ = 0x80 | ( ch & 0x3f);
170 else if ( ch < 0x010000)
171 *s++ = 0xe0 | ( ch >> 12),
172 *s++ = 0x80 | ((ch >> 6) & 0x3f),
173 *s++ = 0x80 | ( ch & 0x3f);
174 else if ( ch < 0x110000)
175 *s++ = 0xf0 | ( ch >> 18),
176 *s++ = 0x80 | ((ch >> 12) & 0x3f),
177 *s++ = 0x80 | ((ch >> 6) & 0x3f),
178 *s++ = 0x80 | ( ch & 0x3f);
179
180 return s;
181}
182
183// convert offset pointer to character index, sv must be string
184static STRLEN
185ptr_to_index (SV *sv, char *offset)
186{
187 return SvUTF8 (sv)
188 ? utf8_distance (offset, SvPVX (sv))
189 : offset - SvPVX (sv);
101} 190}
102 191
103///////////////////////////////////////////////////////////////////////////// 192/////////////////////////////////////////////////////////////////////////////
104// encoder 193// encoder
105 194
… …
107typedef struct 196typedef struct
108{ 197{
109 char *cur; // SvPVX (sv) + current output position 198 char *cur; // SvPVX (sv) + current output position
110 char *end; // SvEND (sv) 199 char *end; // SvEND (sv)
111 SV *sv; // result scalar 200 SV *sv; // result scalar
112 U32 flags; // F_* 201 JSON json;
113 U32 indent; // indentation level 202 U32 indent; // indentation level
114 U32 maxdepth; // max. indentation/recursion level 203 UV limit; // escape character values >= this value when encoding
115} enc_t; 204} enc_t;
116 205
117inline void 206INLINE void
118need (enc_t *enc, STRLEN len) 207need (enc_t *enc, STRLEN len)
119{ 208{
120 if (expect_false (enc->cur + len >= enc->end)) 209 if (expect_false (enc->cur + len >= enc->end))
121 { 210 {
122 STRLEN cur = enc->cur - SvPVX (enc->sv); 211 STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
123 SvGROW (enc->sv, cur + len + 1); 212 SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
124 enc->cur = SvPVX (enc->sv) + cur; 213 enc->cur = SvPVX (enc->sv) + cur;
125 enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1; 214 enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
126 } 215 }
127} 216}
128 217
129inline void 218INLINE void
130encode_ch (enc_t *enc, char ch) 219encode_ch (enc_t *enc, char ch)
131{ 220{
132 need (enc, 1); 221 need (enc, 1);
133 *enc->cur++ = ch; 222 *enc->cur++ = ch;
134} 223}
… …
178 STRLEN clen; 267 STRLEN clen;
179 UV uch; 268 UV uch;
180 269
181 if (is_utf8) 270 if (is_utf8)
182 { 271 {
183 //uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY);
184 uch = decode_utf8 (str, end - str, &clen); 272 uch = decode_utf8 (str, end - str, &clen);
185 if (clen == (STRLEN)-1) 273 if (clen == (STRLEN)-1)
186 croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str); 274 croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);
187 } 275 }
188 else 276 else
189 { 277 {
190 uch = ch; 278 uch = ch;
191 clen = 1; 279 clen = 1;
192 } 280 }
193 281
194 if (uch > 0x10FFFFUL) 282 if (uch < 0x80/*0x20*/ || uch >= enc->limit)
195 croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
196
197 if (uch < 0x80 || enc->flags & F_ASCII || (enc->flags & F_LATIN1 && uch > 0xFF))
198 { 283 {
199 if (uch > 0xFFFFUL) 284 if (uch >= 0x10000UL)
200 { 285 {
286 if (uch >= 0x110000UL)
287 croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
288
201 need (enc, len += 11); 289 need (enc, len += 11);
202 sprintf (enc->cur, "\\u%04x\\u%04x", 290 sprintf (enc->cur, "\\u%04x\\u%04x",
203 (int)((uch - 0x10000) / 0x400 + 0xD800), 291 (int)((uch - 0x10000) / 0x400 + 0xD800),
204 (int)((uch - 0x10000) % 0x400 + 0xDC00)); 292 (int)((uch - 0x10000) % 0x400 + 0xDC00));
205 enc->cur += 12; 293 enc->cur += 12;
206 } 294 }
207 else 295 else
208 { 296 {
209 static char hexdigit [16] = "0123456789abcdef";
210 need (enc, len += 5); 297 need (enc, len += 5);
211 *enc->cur++ = '\\'; 298 *enc->cur++ = '\\';
212 *enc->cur++ = 'u'; 299 *enc->cur++ = 'u';
213 *enc->cur++ = hexdigit [ uch >> 12 ]; 300 *enc->cur++ = PL_hexdigit [ uch >> 12 ];
214 *enc->cur++ = hexdigit [(uch >> 8) & 15]; 301 *enc->cur++ = PL_hexdigit [(uch >> 8) & 15];
215 *enc->cur++ = hexdigit [(uch >> 4) & 15]; 302 *enc->cur++ = PL_hexdigit [(uch >> 4) & 15];
216 *enc->cur++ = hexdigit [(uch >> 0) & 15]; 303 *enc->cur++ = PL_hexdigit [(uch >> 0) & 15];
217 } 304 }
218 305
219 str += clen; 306 str += clen;
220 } 307 }
221 else if (enc->flags & F_LATIN1) 308 else if (enc->json.flags & F_LATIN1)
222 { 309 {
223 *enc->cur++ = uch; 310 *enc->cur++ = uch;
224 str += clen; 311 str += clen;
225 } 312 }
226 else if (is_utf8) 313 else if (is_utf8)
… …
233 while (--clen); 320 while (--clen);
234 } 321 }
235 else 322 else
236 { 323 {
237 need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed 324 need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed
238 enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0); 325 enc->cur = encode_utf8 (enc->cur, uch);
239 ++str; 326 ++str;
240 } 327 }
241 } 328 }
242 } 329 }
243 } 330 }
244 331
245 --len; 332 --len;
246 } 333 }
247} 334}
248 335
249inline void 336INLINE void
250encode_indent (enc_t *enc) 337encode_indent (enc_t *enc)
251{ 338{
252 if (enc->flags & F_INDENT) 339 if (enc->json.flags & F_INDENT)
253 { 340 {
254 int spaces = enc->indent * INDENT_STEP; 341 int spaces = enc->indent * INDENT_STEP;
255 342
256 need (enc, spaces); 343 need (enc, spaces);
257 memset (enc->cur, ' ', spaces); 344 memset (enc->cur, ' ', spaces);
258 enc->cur += spaces; 345 enc->cur += spaces;
259 } 346 }
260} 347}
261 348
262inline void 349INLINE void
263encode_space (enc_t *enc) 350encode_space (enc_t *enc)
264{ 351{
265 need (enc, 1); 352 need (enc, 1);
266 encode_ch (enc, ' '); 353 encode_ch (enc, ' ');
267} 354}
268 355
269inline void 356INLINE void
270encode_nl (enc_t *enc) 357encode_nl (enc_t *enc)
271{ 358{
272 if (enc->flags & F_INDENT) 359 if (enc->json.flags & F_INDENT)
273 { 360 {
274 need (enc, 1); 361 need (enc, 1);
275 encode_ch (enc, '\n'); 362 encode_ch (enc, '\n');
276 } 363 }
277} 364}
278 365
279inline void 366INLINE void
280encode_comma (enc_t *enc) 367encode_comma (enc_t *enc)
281{ 368{
282 encode_ch (enc, ','); 369 encode_ch (enc, ',');
283 370
284 if (enc->flags & F_INDENT) 371 if (enc->json.flags & F_INDENT)
285 encode_nl (enc); 372 encode_nl (enc);
286 else if (enc->flags & F_SPACE_AFTER) 373 else if (enc->json.flags & F_SPACE_AFTER)
287 encode_space (enc); 374 encode_space (enc);
288} 375}
289 376
290static void encode_sv (enc_t *enc, SV *sv); 377static void encode_sv (enc_t *enc, SV *sv);
291 378
292static void 379static void
293encode_av (enc_t *enc, AV *av) 380encode_av (enc_t *enc, AV *av)
294{ 381{
295 int i, len = av_len (av); 382 int i, len = av_len (av);
296 383
297 if (enc->indent >= enc->maxdepth) 384 if (enc->indent >= enc->json.max_depth)
298 croak ("data structure too deep (hit recursion limit)"); 385 croak (ERR_NESTING_EXCEEDED);
299 386
300 encode_ch (enc, '['); encode_nl (enc); 387 encode_ch (enc, '[');
301 ++enc->indent; 388
389 if (len >= 0)
390 {
391 encode_nl (enc); ++enc->indent;
302 392
303 for (i = 0; i <= len; ++i) 393 for (i = 0; i <= len; ++i)
304 { 394 {
395 SV **svp = av_fetch (av, i, 0);
396
305 encode_indent (enc); 397 encode_indent (enc);
306 encode_sv (enc, *av_fetch (av, i, 0));
307 398
399 if (svp)
400 encode_sv (enc, *svp);
401 else
402 encode_str (enc, "null", 4, 0);
403
308 if (i < len) 404 if (i < len)
309 encode_comma (enc); 405 encode_comma (enc);
310 } 406 }
311 407
408 encode_nl (enc); --enc->indent; encode_indent (enc);
409 }
410
312 encode_nl (enc); 411 encode_ch (enc, ']');
313
314 --enc->indent;
315 encode_indent (enc); encode_ch (enc, ']');
316} 412}
317 413
318static void 414static void
319encode_he (enc_t *enc, HE *he) 415encode_hk (enc_t *enc, HE *he)
320{ 416{
321 encode_ch (enc, '"'); 417 encode_ch (enc, '"');
322 418
323 if (HeKLEN (he) == HEf_SVKEY) 419 if (HeKLEN (he) == HEf_SVKEY)
324 { 420 {
… …
334 else 430 else
335 encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he)); 431 encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));
336 432
337 encode_ch (enc, '"'); 433 encode_ch (enc, '"');
338 434
339 if (enc->flags & F_SPACE_BEFORE) encode_space (enc); 435 if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);
340 encode_ch (enc, ':'); 436 encode_ch (enc, ':');
341 if (enc->flags & F_SPACE_AFTER ) encode_space (enc); 437 if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);
342 encode_sv (enc, HeVAL (he));
343} 438}
344 439
345// compare hash entries, used when all keys are bytestrings 440// compare hash entries, used when all keys are bytestrings
346static int 441static int
347he_cmp_fast (const void *a_, const void *b_) 442he_cmp_fast (const void *a_, const void *b_)
… …
352 HE *b = *(HE **)b_; 447 HE *b = *(HE **)b_;
353 448
354 STRLEN la = HeKLEN (a); 449 STRLEN la = HeKLEN (a);
355 STRLEN lb = HeKLEN (b); 450 STRLEN lb = HeKLEN (b);
356 451
357 if (!(cmp = memcmp (HeKEY (a), HeKEY (b), la < lb ? la : lb))) 452 if (!(cmp = memcmp (HeKEY (b), HeKEY (a), lb < la ? lb : la)))
358 cmp = la - lb; 453 cmp = lb - la;
359 454
360 return cmp; 455 return cmp;
361} 456}
362 457
363// compare hash entries, used when some keys are sv's or utf-x 458// compare hash entries, used when some keys are sv's or utf-x
364static int 459static int
365he_cmp_slow (const void *a, const void *b) 460he_cmp_slow (const void *a, const void *b)
366{ 461{
367 return sv_cmp (HeSVKEY_force (*(HE **)a), HeSVKEY_force (*(HE **)b)); 462 return sv_cmp (HeSVKEY_force (*(HE **)b), HeSVKEY_force (*(HE **)a));
368} 463}
369 464
370static void 465static void
371encode_hv (enc_t *enc, HV *hv) 466encode_hv (enc_t *enc, HV *hv)
372{ 467{
373 int count, i; 468 HE *he;
374 469
375 if (enc->indent >= enc->maxdepth) 470 if (enc->indent >= enc->json.max_depth)
376 croak ("data structure too deep (hit recursion limit)"); 471 croak (ERR_NESTING_EXCEEDED);
377 472
378 encode_ch (enc, '{'); encode_nl (enc); ++enc->indent; 473 encode_ch (enc, '{');
379 474
380 if ((count = hv_iterinit (hv)))
381 {
382 // for canonical output we have to sort by keys first 475 // for canonical output we have to sort by keys first
383 // actually, this is mostly due to the stupid so-called 476 // actually, this is mostly due to the stupid so-called
384 // security workaround added somewhere in 5.8.x. 477 // security workaround added somewhere in 5.8.x
385 // that randomises hash orderings 478 // that randomises hash orderings
386 if (enc->flags & F_CANONICAL) 479 if (enc->json.flags & F_CANONICAL && !SvRMAGICAL (hv))
480 {
481 int count = hv_iterinit (hv);
482
483 if (SvMAGICAL (hv))
387 { 484 {
485 // need to count by iterating. could improve by dynamically building the vector below
486 // but I don't care for the speed of this special case.
487 // note also that we will run into undefined behaviour when the two iterations
488 // do not result in the same count, something I might care for in some later release.
489
490 count = 0;
491 while (hv_iternext (hv))
492 ++count;
493
494 hv_iterinit (hv);
495 }
496
497 if (count)
498 {
388 int fast = 1; 499 int i, fast = 1;
389 HE *he;
390#if defined(__BORLANDC__) || defined(_MSC_VER) 500#if defined(__BORLANDC__) || defined(_MSC_VER)
391 HE **hes = _alloca (count * sizeof (HE)); 501 HE **hes = _alloca (count * sizeof (HE));
392#else 502#else
393 HE *hes [count]; // if your compiler dies here, you need to enable C99 mode 503 HE *hes [count]; // if your compiler dies here, you need to enable C99 mode
394#endif 504#endif
… …
421 531
422 FREETMPS; 532 FREETMPS;
423 LEAVE; 533 LEAVE;
424 } 534 }
425 535
426 for (i = 0; i < count; ++i) 536 encode_nl (enc); ++enc->indent;
537
538 while (count--)
427 { 539 {
428 encode_indent (enc); 540 encode_indent (enc);
541 he = hes [count];
429 encode_he (enc, hes [i]); 542 encode_hk (enc, he);
543 encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
430 544
431 if (i < count - 1) 545 if (count)
432 encode_comma (enc); 546 encode_comma (enc);
433 } 547 }
434 548
549 encode_nl (enc); --enc->indent; encode_indent (enc);
550 }
551 }
552 else
553 {
554 if (hv_iterinit (hv) || SvMAGICAL (hv))
555 if ((he = hv_iternext (hv)))
556 {
557 encode_nl (enc); ++enc->indent;
558
559 for (;;)
560 {
435 encode_nl (enc); 561 encode_indent (enc);
562 encode_hk (enc, he);
563 encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
564
565 if (!(he = hv_iternext (hv)))
566 break;
567
568 encode_comma (enc);
569 }
570
571 encode_nl (enc); --enc->indent; encode_indent (enc);
572 }
573 }
574
575 encode_ch (enc, '}');
576}
577
578// encode objects, arrays and special \0=false and \1=true values.
579static void
580encode_rv (enc_t *enc, SV *sv)
581{
582 svtype svt;
583
584 SvGETMAGIC (sv);
585 svt = SvTYPE (sv);
586
587 if (expect_false (SvOBJECT (sv)))
588 {
589 HV *stash = !JSON_SLOW || json_boolean_stash
590 ? json_boolean_stash
591 : gv_stashpv ("JSON::XS::Boolean", 1);
592
593 if (SvSTASH (sv) == stash)
594 {
595 if (SvIV (sv))
596 encode_str (enc, "true", 4, 0);
597 else
598 encode_str (enc, "false", 5, 0);
436 } 599 }
437 else 600 else
438 { 601 {
439 HE *he = hv_iternext (hv); 602#if 0
440 603 if (0 && sv_derived_from (rv, "JSON::Literal"))
441 for (;;)
442 { 604 {
443 encode_indent (enc); 605 // not yet
444 encode_he (enc, he);
445
446 if (!(he = hv_iternext (hv)))
447 break;
448
449 encode_comma (enc);
450 } 606 }
607#endif
608 if (enc->json.flags & F_CONV_BLESSED)
609 {
610 // we re-bless the reference to get overload and other niceties right
611 GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 0);
451 612
613 if (to_json)
614 {
615 dSP;
616
617 ENTER; SAVETMPS; PUSHMARK (SP);
618 XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
619
620 // calling with G_SCALAR ensures that we always get a 1 return value
621 PUTBACK;
622 call_sv ((SV *)GvCV (to_json), G_SCALAR);
623 SPAGAIN;
624
625 // catch this surprisingly common error
626 if (SvROK (TOPs) && SvRV (TOPs) == sv)
627 croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
628
629 sv = POPs;
630 PUTBACK;
631
452 encode_nl (enc); 632 encode_sv (enc, sv);
633
634 FREETMPS; LEAVE;
635 }
636 else if (enc->json.flags & F_ALLOW_BLESSED)
637 encode_str (enc, "null", 4, 0);
638 else
639 croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
640 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
641 }
642 else if (enc->json.flags & F_ALLOW_BLESSED)
643 encode_str (enc, "null", 4, 0);
644 else
645 croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled",
646 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
453 } 647 }
454 } 648 }
455
456 --enc->indent; encode_indent (enc); encode_ch (enc, '}');
457}
458
459// encode objects, arrays and special \0=false and \1=true values.
460static void
461encode_rv (enc_t *enc, SV *sv)
462{
463 svtype svt;
464
465 SvGETMAGIC (sv);
466 svt = SvTYPE (sv);
467
468 if (svt == SVt_PVHV) 649 else if (svt == SVt_PVHV)
469 encode_hv (enc, (HV *)sv); 650 encode_hv (enc, (HV *)sv);
470 else if (svt == SVt_PVAV) 651 else if (svt == SVt_PVAV)
471 encode_av (enc, (AV *)sv); 652 encode_av (enc, (AV *)sv);
472 else if (svt < SVt_PVAV) 653 else if (svt < SVt_PVAV)
473 { 654 {
474 if (SvNIOK (sv) && SvIV (sv) == 0) 655 STRLEN len = 0;
656 char *pv = svt ? SvPV (sv, len) : 0;
657
658 if (len == 1 && *pv == '1')
659 encode_str (enc, "true", 4, 0);
660 else if (len == 1 && *pv == '0')
475 encode_str (enc, "false", 5, 0); 661 encode_str (enc, "false", 5, 0);
476 else if (SvNIOK (sv) && SvIV (sv) == 1) 662 else if (enc->json.flags & F_ALLOW_UNKNOWN)
477 encode_str (enc, "true", 4, 0); 663 encode_str (enc, "null", 4, 0);
478 else 664 else
479 croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1", 665 croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
480 SvPV_nolen (sv_2mortal (newRV_inc (sv)))); 666 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
481 } 667 }
668 else if (enc->json.flags & F_ALLOW_UNKNOWN)
669 encode_str (enc, "null", 4, 0);
482 else 670 else
483 croak ("encountered %s, but JSON can only represent references to arrays or hashes", 671 croak ("encountered %s, but JSON can only represent references to arrays or hashes",
484 SvPV_nolen (sv_2mortal (newRV_inc (sv)))); 672 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
485} 673}
486 674
… …
497 encode_str (enc, str, len, SvUTF8 (sv)); 685 encode_str (enc, str, len, SvUTF8 (sv));
498 encode_ch (enc, '"'); 686 encode_ch (enc, '"');
499 } 687 }
500 else if (SvNOKp (sv)) 688 else if (SvNOKp (sv))
501 { 689 {
690 // trust that perl will do the right thing w.r.t. JSON syntax.
502 need (enc, NV_DIG + 32); 691 need (enc, NV_DIG + 32);
503 Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur); 692 Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
504 enc->cur += strlen (enc->cur); 693 enc->cur += strlen (enc->cur);
505 } 694 }
506 else if (SvIOKp (sv)) 695 else if (SvIOKp (sv))
507 { 696 {
508 // we assume we can always read an IV as a UV 697 // we assume we can always read an IV as a UV and vice versa
509 if (SvUV (sv) & ~(UV)0x7fff) 698 // we assume two's complement
699 // we assume no aliasing issues in the union
700 if (SvIsUV (sv) ? SvUVX (sv) <= 59000
701 : SvIVX (sv) <= 59000 && SvIVX (sv) >= -59000)
510 { 702 {
511 need (enc, sizeof (UV) * 3); 703 // optimise the "small number case"
512 enc->cur += 704 // code will likely be branchless and use only a single multiplication
513 SvIsUV(sv) 705 // works for numbers up to 59074
514 ? snprintf (enc->cur, sizeof (UV) * 3, "%"UVuf, (UV)SvUVX (sv)) 706 I32 i = SvIVX (sv);
515 : snprintf (enc->cur, sizeof (UV) * 3, "%"IVdf, (IV)SvIVX (sv)); 707 U32 u;
708 char digit, nz = 0;
709
710 need (enc, 6);
711
712 *enc->cur = '-'; enc->cur += i < 0 ? 1 : 0;
713 u = i < 0 ? -i : i;
714
715 // convert to 4.28 fixed-point representation
716 u = u * ((0xfffffff + 10000) / 10000); // 10**5, 5 fractional digits
717
718 // now output digit by digit, each time masking out the integer part
719 // and multiplying by 5 while moving the decimal point one to the right,
720 // resulting in a net multiplication by 10.
721 // we always write the digit to memory but conditionally increment
722 // the pointer, to enable the use of conditional move instructions.
723 digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffffUL) * 5;
724 digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffffUL) * 5;
725 digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffffUL) * 5;
726 digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffffUL) * 5;
727 digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
516 } 728 }
517 else 729 else
518 { 730 {
519 // optimise the "small number case" 731 // large integer, use the (rather slow) snprintf way.
520 // code will likely be branchless and use only a single multiplication
521 I32 i = SvIV (sv);
522 U32 u;
523
524 need (enc, 6); 732 need (enc, IVUV_MAXCHARS);
525 733 enc->cur +=
526 *enc->cur = '-'; enc->cur += i < 0 ? 1 : 0; 734 SvIsUV(sv)
527 u = i < 0 ? -i : i; 735 ? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv))
528 736 : snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv));
529 // convert to 4.28 fixed-point representation
530 u = u * ((0xfffffff + 10000) / 10000); // 10**5, 5 fractional digits
531
532 char digit, nz = 0;
533
534 digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffff) * 5;
535 digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffff) * 5;
536 digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffff) * 5;
537 digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffff) * 5;
538 digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1;
539 } 737 }
540 } 738 }
541 else if (SvROK (sv)) 739 else if (SvROK (sv))
542 encode_rv (enc, SvRV (sv)); 740 encode_rv (enc, SvRV (sv));
543 else if (!SvOK (sv)) 741 else if (!SvOK (sv) || enc->json.flags & F_ALLOW_UNKNOWN)
544 encode_str (enc, "null", 4, 0); 742 encode_str (enc, "null", 4, 0);
545 else 743 else
546 croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this", 744 croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",
547 SvPV_nolen (sv), SvFLAGS (sv)); 745 SvPV_nolen (sv), SvFLAGS (sv));
548} 746}
549 747
550static SV * 748static SV *
551encode_json (SV *scalar, U32 flags) 749encode_json (SV *scalar, JSON *json)
552{ 750{
553 enc_t enc; 751 enc_t enc;
554 752
555 if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar)) 753 if (!(json->flags & F_ALLOW_NONREF) && !SvROK (scalar))
556 croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)"); 754 croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
557 755
558 enc.flags = flags; 756 enc.json = *json;
559 enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); 757 enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
560 enc.cur = SvPVX (enc.sv); 758 enc.cur = SvPVX (enc.sv);
561 enc.end = SvEND (enc.sv); 759 enc.end = SvEND (enc.sv);
562 enc.indent = 0; 760 enc.indent = 0;
563 enc.maxdepth = DEC_DEPTH (flags); 761 enc.limit = enc.json.flags & F_ASCII ? 0x000080UL
762 : enc.json.flags & F_LATIN1 ? 0x000100UL
763 : 0x110000UL;
564 764
565 SvPOK_only (enc.sv); 765 SvPOK_only (enc.sv);
566 encode_sv (&enc, scalar); 766 encode_sv (&enc, scalar);
767 encode_nl (&enc);
567 768
568 SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); 769 SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
569 *SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings 770 *SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
570 771
571 if (!(flags & (F_ASCII | F_LATIN1 | F_UTF8))) 772 if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8)))
572 SvUTF8_on (enc.sv); 773 SvUTF8_on (enc.sv);
573 774
574 if (enc.flags & F_SHRINK) 775 if (enc.json.flags & F_SHRINK)
575 shrink (enc.sv); 776 shrink (enc.sv);
576 777
577 return enc.sv; 778 return enc.sv;
578} 779}
579 780
… …
584typedef struct 785typedef struct
585{ 786{
586 char *cur; // current parser pointer 787 char *cur; // current parser pointer
587 char *end; // end of input string 788 char *end; // end of input string
588 const char *err; // parse error, if != 0 789 const char *err; // parse error, if != 0
589 U32 flags; // F_* 790 JSON json;
590 U32 depth; // recursion depth 791 U32 depth; // recursion depth
591 U32 maxdepth; // recursion depth limit 792 U32 maxdepth; // recursion depth limit
592} dec_t; 793} dec_t;
593 794
594inline void 795INLINE void
796decode_comment (dec_t *dec)
797{
798 // only '#'-style comments allowed a.t.m.
799
800 while (*dec->cur && *dec->cur != 0x0a && *dec->cur != 0x0d)
801 ++dec->cur;
802}
803
804INLINE void
595decode_ws (dec_t *dec) 805decode_ws (dec_t *dec)
596{ 806{
597 for (;;) 807 for (;;)
598 { 808 {
599 char ch = *dec->cur; 809 char ch = *dec->cur;
600 810
601 if (ch > 0x20 811 if (ch > 0x20)
812 {
813 if (expect_false (ch == '#'))
814 {
815 if (dec->json.flags & F_RELAXED)
816 decode_comment (dec);
817 else
818 break;
819 }
820 else
821 break;
822 }
602 || (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)) 823 else if (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)
603 break; 824 break; // parse error, but let higher level handle it, gives better error messages
604 825
605 ++dec->cur; 826 ++dec->cur;
606 } 827 }
607} 828}
608 829
… …
612 if (*dec->cur != ch) \ 833 if (*dec->cur != ch) \
613 ERR (# ch " expected"); \ 834 ERR (# ch " expected"); \
614 ++dec->cur; \ 835 ++dec->cur; \
615 SE 836 SE
616 837
617#define DEC_INC_DEPTH if (++dec->depth > dec->maxdepth) ERR ("json datastructure exceeds maximum nesting level (set a higher max_depth)") 838#define DEC_INC_DEPTH if (++dec->depth > dec->json.max_depth) ERR (ERR_NESTING_EXCEEDED)
618#define DEC_DEC_DEPTH --dec->depth 839#define DEC_DEC_DEPTH --dec->depth
619 840
620static SV *decode_sv (dec_t *dec); 841static SV *decode_sv (dec_t *dec);
621 842
622static signed char decode_hexdigit[256]; 843static signed char decode_hexdigit[256];
… …
625decode_4hex (dec_t *dec) 846decode_4hex (dec_t *dec)
626{ 847{
627 signed char d1, d2, d3, d4; 848 signed char d1, d2, d3, d4;
628 unsigned char *cur = (unsigned char *)dec->cur; 849 unsigned char *cur = (unsigned char *)dec->cur;
629 850
630 d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("four hexadecimal digits expected"); 851 d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("exactly four hexadecimal digits expected");
631 d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("four hexadecimal digits expected"); 852 d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("exactly four hexadecimal digits expected");
632 d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("four hexadecimal digits expected"); 853 d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("exactly four hexadecimal digits expected");
633 d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("four hexadecimal digits expected"); 854 d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("exactly four hexadecimal digits expected");
634 855
635 dec->cur += 4; 856 dec->cur += 4;
636 857
637 return ((UV)d1) << 12 858 return ((UV)d1) << 12
638 | ((UV)d2) << 8 859 | ((UV)d2) << 8
… …
714 935
715 if (hi >= 0x80) 936 if (hi >= 0x80)
716 { 937 {
717 utf8 = 1; 938 utf8 = 1;
718 939
719 cur = (char *)uvuni_to_utf8_flags (cur, hi, 0); 940 cur = encode_utf8 (cur, hi);
720 } 941 }
721 else 942 else
722 *cur++ = hi; 943 *cur++ = hi;
723 } 944 }
724 break; 945 break;
… …
726 default: 947 default:
727 --dec_cur; 948 --dec_cur;
728 ERR ("illegal backslash escape sequence in string"); 949 ERR ("illegal backslash escape sequence in string");
729 } 950 }
730 } 951 }
731 else if (expect_true (ch >= 0x20 && ch <= 0x7f)) 952 else if (expect_true (ch >= 0x20 && ch < 0x80))
732 *cur++ = ch; 953 *cur++ = ch;
733 else if (ch >= 0x80) 954 else if (ch >= 0x80)
734 { 955 {
735 STRLEN clen; 956 STRLEN clen;
736 UV uch;
737 957
738 --dec_cur; 958 --dec_cur;
739 959
740 uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen); 960 decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
741 if (clen == (STRLEN)-1) 961 if (clen == (STRLEN)-1)
742 ERR ("malformed UTF-8 character in JSON string"); 962 ERR ("malformed UTF-8 character in JSON string");
743 963
744 do 964 do
745 *cur++ = *dec_cur++; 965 *cur++ = *dec_cur++;
… …
762 { 982 {
763 STRLEN len = cur - buf; 983 STRLEN len = cur - buf;
764 984
765 if (sv) 985 if (sv)
766 { 986 {
767 SvGROW (sv, SvCUR (sv) + len + 1); 987 STRLEN cur = SvCUR (sv);
988
989 if (SvLEN (sv) <= cur + len)
990 SvGROW (sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
991
768 memcpy (SvPVX (sv) + SvCUR (sv), buf, len); 992 memcpy (SvPVX (sv) + SvCUR (sv), buf, len);
769 SvCUR_set (sv, SvCUR (sv) + len); 993 SvCUR_set (sv, SvCUR (sv) + len);
770 } 994 }
771 else 995 else
772 sv = newSVpvn (buf, len); 996 sv = newSVpvn (buf, len);
… …
857 is_nv = 1; 1081 is_nv = 1;
858 } 1082 }
859 1083
860 if (!is_nv) 1084 if (!is_nv)
861 { 1085 {
1086 int len = dec->cur - start;
1087
862 // special case the rather common 1..4-digit-int case, assumes 32 bit ints or so 1088 // special case the rather common 1..5-digit-int case
863 if (*start == '-') 1089 if (*start == '-')
864 switch (dec->cur - start) 1090 switch (len)
865 { 1091 {
866 case 2: return newSViv (-( start [1] - '0' )); 1092 case 2: return newSViv (-(IV)( start [1] - '0' * 1));
867 case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11)); 1093 case 3: return newSViv (-(IV)( start [1] * 10 + start [2] - '0' * 11));
868 case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111)); 1094 case 4: return newSViv (-(IV)( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
869 case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111)); 1095 case 5: return newSViv (-(IV)( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
1096 case 6: return newSViv (-(IV)(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));
870 } 1097 }
871 else 1098 else
872 switch (dec->cur - start) 1099 switch (len)
873 { 1100 {
874 case 1: return newSViv ( start [0] - '0' ); 1101 case 1: return newSViv ( start [0] - '0' * 1);
875 case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11); 1102 case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
876 case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111); 1103 case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
877 case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111); 1104 case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
1105 case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);
878 } 1106 }
879 1107
880 { 1108 {
881 UV uv; 1109 UV uv;
882 int numtype = grok_number (start, dec->cur - start, &uv); 1110 int numtype = grok_number (start, len, &uv);
883 if (numtype & IS_NUMBER_IN_UV) 1111 if (numtype & IS_NUMBER_IN_UV)
884 if (numtype & IS_NUMBER_NEG) 1112 if (numtype & IS_NUMBER_NEG)
885 { 1113 {
886 if (uv < (UV)IV_MIN) 1114 if (uv < (UV)IV_MIN)
887 return newSViv (-(IV)uv); 1115 return newSViv (-(IV)uv);
888 } 1116 }
889 else 1117 else
890 return newSVuv (uv); 1118 return newSVuv (uv);
891 } 1119 }
892 }
893 1120
1121 len -= *start == '-' ? 1 : 0;
1122
1123 // does not fit into IV or UV, try NV
1124 if ((sizeof (NV) == sizeof (double) && DBL_DIG >= len)
1125 #if defined (LDBL_DIG)
1126 || (sizeof (NV) == sizeof (long double) && LDBL_DIG >= len)
1127 #endif
1128 )
1129 // fits into NV without loss of precision
1130 return newSVnv (Atof (start));
1131
1132 // everything else fails, convert it to a string
1133 return newSVpvn (start, dec->cur - start);
1134 }
1135
1136 // loss of precision here
894 return newSVnv (Atof (start)); 1137 return newSVnv (Atof (start));
895 1138
896fail: 1139fail:
897 return 0; 1140 return 0;
898} 1141}
… …
928 1171
929 if (*dec->cur != ',') 1172 if (*dec->cur != ',')
930 ERR (", or ] expected while parsing array"); 1173 ERR (", or ] expected while parsing array");
931 1174
932 ++dec->cur; 1175 ++dec->cur;
1176
1177 decode_ws (dec);
1178
1179 if (*dec->cur == ']' && dec->json.flags & F_RELAXED)
1180 {
1181 ++dec->cur;
1182 break;
1183 }
933 } 1184 }
934 1185
935 DEC_DEC_DEPTH; 1186 DEC_DEC_DEPTH;
936 return newRV_noinc ((SV *)av); 1187 return newRV_noinc ((SV *)av);
937 1188
… …
942} 1193}
943 1194
944static SV * 1195static SV *
945decode_hv (dec_t *dec) 1196decode_hv (dec_t *dec)
946{ 1197{
1198 SV *sv;
947 HV *hv = newHV (); 1199 HV *hv = newHV ();
948 1200
949 DEC_INC_DEPTH; 1201 DEC_INC_DEPTH;
950 decode_ws (dec); 1202 decode_ws (dec);
951 1203
952 if (*dec->cur == '}') 1204 if (*dec->cur == '}')
953 ++dec->cur; 1205 ++dec->cur;
954 else 1206 else
955 for (;;) 1207 for (;;)
956 { 1208 {
1209 EXPECT_CH ('"');
1210
1211 // heuristic: assume that
1212 // a) decode_str + hv_store_ent are abysmally slow.
1213 // b) most hash keys are short, simple ascii text.
1214 // => try to "fast-match" such strings to avoid
1215 // the overhead of decode_str + hv_store_ent.
1216 {
957 SV *key, *value; 1217 SV *value;
1218 char *p = dec->cur;
1219 char *e = p + 24; // only try up to 24 bytes
958 1220
959 decode_ws (dec); EXPECT_CH ('"'); 1221 for (;;)
960
961 key = decode_str (dec);
962 if (!key)
963 goto fail;
964
965 decode_ws (dec); EXPECT_CH (':');
966
967 value = decode_sv (dec);
968 if (!value)
969 { 1222 {
1223 // the >= 0x80 is false on most architectures
1224 if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
1225 {
1226 // slow path, back up and use decode_str
1227 SV *key = decode_str (dec);
1228 if (!key)
1229 goto fail;
1230
1231 decode_ws (dec); EXPECT_CH (':');
1232
1233 decode_ws (dec);
1234 value = decode_sv (dec);
1235 if (!value)
1236 {
1237 SvREFCNT_dec (key);
1238 goto fail;
1239 }
1240
1241 hv_store_ent (hv, key, value, 0);
970 SvREFCNT_dec (key); 1242 SvREFCNT_dec (key);
1243
1244 break;
1245 }
1246 else if (*p == '"')
1247 {
1248 // fast path, got a simple key
1249 char *key = dec->cur;
1250 int len = p - key;
1251 dec->cur = p + 1;
1252
1253 decode_ws (dec); EXPECT_CH (':');
1254
1255 decode_ws (dec);
1256 value = decode_sv (dec);
1257 if (!value)
971 goto fail; 1258 goto fail;
1259
1260 hv_store (hv, key, len, value, 0);
1261
1262 break;
1263 }
1264
1265 ++p;
972 } 1266 }
973 1267 }
974 hv_store_ent (hv, key, value, 0);
975 SvREFCNT_dec (key);
976 1268
977 decode_ws (dec); 1269 decode_ws (dec);
978 1270
979 if (*dec->cur == '}') 1271 if (*dec->cur == '}')
980 { 1272 {
… …
984 1276
985 if (*dec->cur != ',') 1277 if (*dec->cur != ',')
986 ERR (", or } expected while parsing object/hash"); 1278 ERR (", or } expected while parsing object/hash");
987 1279
988 ++dec->cur; 1280 ++dec->cur;
1281
1282 decode_ws (dec);
1283
1284 if (*dec->cur == '}' && dec->json.flags & F_RELAXED)
1285 {
1286 ++dec->cur;
1287 break;
1288 }
989 } 1289 }
990 1290
991 DEC_DEC_DEPTH; 1291 DEC_DEC_DEPTH;
992 return newRV_noinc ((SV *)hv); 1292 sv = newRV_noinc ((SV *)hv);
1293
1294 // check filter callbacks
1295 if (dec->json.flags & F_HOOK)
1296 {
1297 if (dec->json.cb_sk_object && HvKEYS (hv) == 1)
1298 {
1299 HE *cb, *he;
1300
1301 hv_iterinit (hv);
1302 he = hv_iternext (hv);
1303 hv_iterinit (hv);
1304
1305 // the next line creates a mortal sv each time its called.
1306 // might want to optimise this for common cases.
1307 cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0);
1308
1309 if (cb)
1310 {
1311 dSP;
1312 int count;
1313
1314 ENTER; SAVETMPS; PUSHMARK (SP);
1315 XPUSHs (HeVAL (he));
1316
1317 PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
1318
1319 if (count == 1)
1320 {
1321 sv = newSVsv (POPs);
1322 FREETMPS; LEAVE;
1323 return sv;
1324 }
1325
1326 FREETMPS; LEAVE;
1327 }
1328 }
1329
1330 if (dec->json.cb_object)
1331 {
1332 dSP;
1333 int count;
1334
1335 ENTER; SAVETMPS; PUSHMARK (SP);
1336 XPUSHs (sv_2mortal (sv));
1337
1338 PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN;
1339
1340 if (count == 1)
1341 {
1342 sv = newSVsv (POPs);
1343 FREETMPS; LEAVE;
1344 return sv;
1345 }
1346
1347 SvREFCNT_inc (sv);
1348 FREETMPS; LEAVE;
1349 }
1350 }
1351
1352 return sv;
993 1353
994fail: 1354fail:
995 SvREFCNT_dec (hv); 1355 SvREFCNT_dec (hv);
996 DEC_DEC_DEPTH; 1356 DEC_DEC_DEPTH;
997 return 0; 1357 return 0;
998} 1358}
999 1359
1000static SV * 1360static SV *
1001decode_sv (dec_t *dec) 1361decode_sv (dec_t *dec)
1002{ 1362{
1003 decode_ws (dec); 1363 // the beauty of JSON: you need exactly one character lookahead
1364 // to parse everything.
1004 switch (*dec->cur) 1365 switch (*dec->cur)
1005 { 1366 {
1006 case '"': ++dec->cur; return decode_str (dec); 1367 case '"': ++dec->cur; return decode_str (dec);
1007 case '[': ++dec->cur; return decode_av (dec); 1368 case '[': ++dec->cur; return decode_av (dec);
1008 case '{': ++dec->cur; return decode_hv (dec); 1369 case '{': ++dec->cur; return decode_hv (dec);
1009 1370
1010 case '-': 1371 case '-':
1011 case '0': case '1': case '2': case '3': case '4': 1372 case '0': case '1': case '2': case '3': case '4':
1012 case '5': case '6': case '7': case '8': case '9': 1373 case '5': case '6': case '7': case '8': case '9':
1013 return decode_num (dec); 1374 return decode_num (dec);
1014 1375
1015 case 't': 1376 case 't':
1016 if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4)) 1377 if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
1017 { 1378 {
1018 dec->cur += 4; 1379 dec->cur += 4;
1380#if JSON_SLOW
1381 json_true = get_bool ("JSON::XS::true");
1382#endif
1019 return newSViv (1); 1383 return newSVsv (json_true);
1020 } 1384 }
1021 else 1385 else
1022 ERR ("'true' expected"); 1386 ERR ("'true' expected");
1023 1387
1024 break; 1388 break;
1025 1389
1026 case 'f': 1390 case 'f':
1027 if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5)) 1391 if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
1028 { 1392 {
1029 dec->cur += 5; 1393 dec->cur += 5;
1394#if JSON_SLOW
1395 json_false = get_bool ("JSON::XS::false");
1396#endif
1030 return newSViv (0); 1397 return newSVsv (json_false);
1031 } 1398 }
1032 else 1399 else
1033 ERR ("'false' expected"); 1400 ERR ("'false' expected");
1034 1401
1035 break; 1402 break;
… …
1053fail: 1420fail:
1054 return 0; 1421 return 0;
1055} 1422}
1056 1423
1057static SV * 1424static SV *
1058decode_json (SV *string, U32 flags, UV *offset_return) 1425decode_json (SV *string, JSON *json, char **offset_return)
1059{ 1426{
1060 dec_t dec; 1427 dec_t dec;
1061 UV offset;
1062 SV *sv; 1428 SV *sv;
1063 1429
1430 /* work around bugs in 5.10 where manipulating magic values
1431 * will perl ignore the magic in subsequent accesses
1432 */
1064 SvGETMAGIC (string); 1433 /*SvGETMAGIC (string);*/
1434 if (SvMAGICAL (string))
1435 string = sv_2mortal (newSVsv (string));
1436
1065 SvUPGRADE (string, SVt_PV); 1437 SvUPGRADE (string, SVt_PV);
1066 1438
1439 /* work around a bug in perl 5.10, which causes SvCUR to fail an
1440 * assertion with -DDEBUGGING, although SvCUR is documented to
1441 * return the xpv_cur field which certainly exists after upgrading.
1442 * according to nicholas clark, calling SvPOK fixes this.
1443 * But it doesn't fix it, so try another workaround, call SvPV_nolen
1444 * and hope for the best.
1445 * Damnit, SvPV_nolen still trips over yet another assertion. This
1446 * assertion business is seriously broken, try yet another workaround
1447 * for the broken -DDEBUGGING.
1448 */
1449 {
1450#ifdef DEBUGGING
1451 STRLEN offset = SvOK (string) ? sv_len (string) : 0;
1452#else
1453 STRLEN offset = SvCUR (string);
1454#endif
1455
1456 if (offset > json->max_size && json->max_size)
1457 croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
1458 (unsigned long)SvCUR (string), (unsigned long)json->max_size);
1459 }
1460
1067 if (flags & F_UTF8) 1461 if (json->flags & F_UTF8)
1068 sv_utf8_downgrade (string, 0); 1462 sv_utf8_downgrade (string, 0);
1069 else 1463 else
1070 sv_utf8_upgrade (string); 1464 sv_utf8_upgrade (string);
1071 1465
1072 SvGROW (string, SvCUR (string) + 1); // should basically be a NOP 1466 SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
1073 1467
1074 dec.flags = flags; 1468 dec.json = *json;
1075 dec.cur = SvPVX (string); 1469 dec.cur = SvPVX (string);
1076 dec.end = SvEND (string); 1470 dec.end = SvEND (string);
1077 dec.err = 0; 1471 dec.err = 0;
1078 dec.depth = 0; 1472 dec.depth = 0;
1079 dec.maxdepth = DEC_DEPTH (dec.flags); 1473
1474 if (dec.json.cb_object || dec.json.cb_sk_object)
1475 dec.json.flags |= F_HOOK;
1080 1476
1081 *dec.end = 0; // this should basically be a nop, too, but make sure it's there 1477 *dec.end = 0; // this should basically be a nop, too, but make sure it's there
1478
1479 decode_ws (&dec);
1082 sv = decode_sv (&dec); 1480 sv = decode_sv (&dec);
1481
1482 if (offset_return)
1483 *offset_return = dec.cur;
1083 1484
1084 if (!(offset_return || !sv)) 1485 if (!(offset_return || !sv))
1085 { 1486 {
1086 // check for trailing garbage 1487 // check for trailing garbage
1087 decode_ws (&dec); 1488 decode_ws (&dec);
… …
1090 { 1491 {
1091 dec.err = "garbage after JSON object"; 1492 dec.err = "garbage after JSON object";
1092 SvREFCNT_dec (sv); 1493 SvREFCNT_dec (sv);
1093 sv = 0; 1494 sv = 0;
1094 } 1495 }
1095 }
1096
1097 if (offset_return || !sv)
1098 {
1099 offset = dec.flags & F_UTF8
1100 ? dec.cur - SvPVX (string)
1101 : utf8_distance (dec.cur, SvPVX (string));
1102
1103 if (offset_return)
1104 *offset_return = offset;
1105 } 1496 }
1106 1497
1107 if (!sv) 1498 if (!sv)
1108 { 1499 {
1109 SV *uni = sv_newmortal (); 1500 SV *uni = sv_newmortal ();
… …
1115 SAVEVPTR (PL_curcop); 1506 SAVEVPTR (PL_curcop);
1116 PL_curcop = &cop; 1507 PL_curcop = &cop;
1117 pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ); 1508 pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);
1118 LEAVE; 1509 LEAVE;
1119 1510
1120 croak ("%s, at character offset %d [\"%s\"]", 1511 croak ("%s, at character offset %d (before \"%s\")",
1121 dec.err, 1512 dec.err,
1122 (int)offset, 1513 ptr_to_index (string, dec.cur),
1123 dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)"); 1514 dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
1124 } 1515 }
1125 1516
1126 sv = sv_2mortal (sv); 1517 sv = sv_2mortal (sv);
1127 1518
1128 if (!(dec.flags & F_ALLOW_NONREF) && !SvROK (sv)) 1519 if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))
1129 croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)"); 1520 croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
1130 1521
1131 return sv; 1522 return sv;
1523}
1524
1525/////////////////////////////////////////////////////////////////////////////
1526// incremental parser
1527
1528static void
1529incr_parse (JSON *self)
1530{
1531 const char *p = SvPVX (self->incr_text) + self->incr_pos;
1532
1533 // the state machine here is a bit convoluted and could be simplified a lot
1534 // but this would make it slower, so...
1535
1536 for (;;)
1537 {
1538 //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
1539 switch (self->incr_mode)
1540 {
1541 // only used for initial whitespace skipping
1542 case INCR_M_WS:
1543 for (;;)
1544 {
1545 if (*p > 0x20)
1546 {
1547 if (*p == '#')
1548 {
1549 self->incr_mode = INCR_M_C0;
1550 goto incr_m_c;
1551 }
1552 else
1553 {
1554 self->incr_mode = INCR_M_JSON;
1555 goto incr_m_json;
1556 }
1557 }
1558 else if (!*p)
1559 goto interrupt;
1560
1561 ++p;
1562 }
1563
1564 // skip a single char inside a string (for \\-processing)
1565 case INCR_M_BS:
1566 if (!*p)
1567 goto interrupt;
1568
1569 ++p;
1570 self->incr_mode = INCR_M_STR;
1571 goto incr_m_str;
1572
1573 // inside #-style comments
1574 case INCR_M_C0:
1575 case INCR_M_C1:
1576 incr_m_c:
1577 for (;;)
1578 {
1579 if (*p == '\n')
1580 {
1581 self->incr_mode = self->incr_mode == INCR_M_C0 ? INCR_M_WS : INCR_M_JSON;
1582 break;
1583 }
1584 else if (!*p)
1585 goto interrupt;
1586
1587 ++p;
1588 }
1589
1590 break;
1591
1592 // inside a string
1593 case INCR_M_STR:
1594 incr_m_str:
1595 for (;;)
1596 {
1597 if (*p == '"')
1598 {
1599 ++p;
1600 self->incr_mode = INCR_M_JSON;
1601
1602 if (!self->incr_nest)
1603 goto interrupt;
1604
1605 goto incr_m_json;
1606 }
1607 else if (*p == '\\')
1608 {
1609 ++p; // "virtually" consumes character after \
1610
1611 if (!*p) // if at end of string we have to switch modes
1612 {
1613 self->incr_mode = INCR_M_BS;
1614 goto interrupt;
1615 }
1616 }
1617 else if (!*p)
1618 goto interrupt;
1619
1620 ++p;
1621 }
1622
1623 // after initial ws, outside string
1624 case INCR_M_JSON:
1625 incr_m_json:
1626 for (;;)
1627 {
1628 switch (*p++)
1629 {
1630 case 0:
1631 --p;
1632 goto interrupt;
1633
1634 case 0x09:
1635 case 0x0a:
1636 case 0x0d:
1637 case 0x20:
1638 if (!self->incr_nest)
1639 {
1640 --p; // do not eat the whitespace, let the next round do it
1641 goto interrupt;
1642 }
1643 break;
1644
1645 case '"':
1646 self->incr_mode = INCR_M_STR;
1647 goto incr_m_str;
1648
1649 case '[':
1650 case '{':
1651 if (++self->incr_nest > self->max_depth)
1652 croak (ERR_NESTING_EXCEEDED);
1653 break;
1654
1655 case ']':
1656 case '}':
1657 if (--self->incr_nest <= 0)
1658 goto interrupt;
1659 break;
1660
1661 case '#':
1662 self->incr_mode = INCR_M_C1;
1663 goto incr_m_c;
1664 }
1665 }
1666 }
1667
1668 modechange:
1669 ;
1670 }
1671
1672interrupt:
1673 self->incr_pos = p - SvPVX (self->incr_text);
1674 //printf ("interrupt<%.*s>\n", self->incr_pos, SvPVX(self->incr_text));//D
1675 //printf ("return pos %d mode %d nest %d\n", self->incr_pos, self->incr_mode, self->incr_nest);//D
1132} 1676}
1133 1677
1134///////////////////////////////////////////////////////////////////////////// 1678/////////////////////////////////////////////////////////////////////////////
1135// XS interface functions 1679// XS interface functions
1136 1680
1137MODULE = JSON::XS PACKAGE = JSON::XS 1681MODULE = JSON::XS PACKAGE = JSON::XS
1138 1682
1139BOOT: 1683BOOT:
1140{ 1684{
1141 int i; 1685 int i;
1142
1143 memset (decode_hexdigit, 0xff, 256);
1144 1686
1145 for (i = 0; i < 256; ++i) 1687 for (i = 0; i < 256; ++i)
1146 decode_hexdigit [i] = 1688 decode_hexdigit [i] =
1147 i >= '0' && i <= '9' ? i - '0' 1689 i >= '0' && i <= '9' ? i - '0'
1148 : i >= 'a' && i <= 'f' ? i - 'a' + 10 1690 : i >= 'a' && i <= 'f' ? i - 'a' + 10
1149 : i >= 'A' && i <= 'F' ? i - 'A' + 10 1691 : i >= 'A' && i <= 'F' ? i - 'A' + 10
1150 : -1; 1692 : -1;
1151 1693
1152 json_stash = gv_stashpv ("JSON::XS", 1); 1694 json_stash = gv_stashpv ("JSON::XS" , 1);
1695 json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1);
1696
1697 json_true = get_bool ("JSON::XS::true");
1698 json_false = get_bool ("JSON::XS::false");
1699
1700 CvNODEBUG_on (get_cv ("JSON::XS::incr_text", 0)); /* the debugger completely breaks lvalue subs */
1153} 1701}
1154 1702
1155PROTOTYPES: DISABLE 1703PROTOTYPES: DISABLE
1156 1704
1157SV *new (char *dummy) 1705void CLONE (...)
1158 CODE: 1706 CODE:
1159 RETVAL = sv_bless (newRV_noinc (newSVuv (F_DEFAULT)), json_stash); 1707 json_stash = 0;
1708 json_boolean_stash = 0;
1709
1710void new (char *klass)
1711 PPCODE:
1712{
1713 SV *pv = NEWSV (0, sizeof (JSON));
1714 SvPOK_only (pv);
1715 json_init ((JSON *)SvPVX (pv));
1716 XPUSHs (sv_2mortal (sv_bless (
1717 newRV_noinc (pv),
1718 strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)
1719 )));
1720}
1721
1722void ascii (JSON *self, int enable = 1)
1723 ALIAS:
1724 ascii = F_ASCII
1725 latin1 = F_LATIN1
1726 utf8 = F_UTF8
1727 indent = F_INDENT
1728 canonical = F_CANONICAL
1729 space_before = F_SPACE_BEFORE
1730 space_after = F_SPACE_AFTER
1731 pretty = F_PRETTY
1732 allow_nonref = F_ALLOW_NONREF
1733 shrink = F_SHRINK
1734 allow_blessed = F_ALLOW_BLESSED
1735 convert_blessed = F_CONV_BLESSED
1736 relaxed = F_RELAXED
1737 allow_unknown = F_ALLOW_UNKNOWN
1738 PPCODE:
1739{
1740 if (enable)
1741 self->flags |= ix;
1742 else
1743 self->flags &= ~ix;
1744
1745 XPUSHs (ST (0));
1746}
1747
1748void get_ascii (JSON *self)
1749 ALIAS:
1750 get_ascii = F_ASCII
1751 get_latin1 = F_LATIN1
1752 get_utf8 = F_UTF8
1753 get_indent = F_INDENT
1754 get_canonical = F_CANONICAL
1755 get_space_before = F_SPACE_BEFORE
1756 get_space_after = F_SPACE_AFTER
1757 get_allow_nonref = F_ALLOW_NONREF
1758 get_shrink = F_SHRINK
1759 get_allow_blessed = F_ALLOW_BLESSED
1760 get_convert_blessed = F_CONV_BLESSED
1761 get_relaxed = F_RELAXED
1762 get_allow_unknown = F_ALLOW_UNKNOWN
1763 PPCODE:
1764 XPUSHs (boolSV (self->flags & ix));
1765
1766void max_depth (JSON *self, U32 max_depth = 0x80000000UL)
1767 PPCODE:
1768 self->max_depth = max_depth;
1769 XPUSHs (ST (0));
1770
1771U32 get_max_depth (JSON *self)
1772 CODE:
1773 RETVAL = self->max_depth;
1160 OUTPUT: 1774 OUTPUT:
1161 RETVAL 1775 RETVAL
1162 1776
1163SV *ascii (SV *self, int enable = 1) 1777void max_size (JSON *self, U32 max_size = 0)
1164 ALIAS: 1778 PPCODE:
1165 ascii = F_ASCII 1779 self->max_size = max_size;
1166 latin1 = F_LATIN1 1780 XPUSHs (ST (0));
1167 utf8 = F_UTF8 1781
1168 indent = F_INDENT 1782int get_max_size (JSON *self)
1169 canonical = F_CANONICAL
1170 space_before = F_SPACE_BEFORE
1171 space_after = F_SPACE_AFTER
1172 pretty = F_PRETTY
1173 allow_nonref = F_ALLOW_NONREF
1174 shrink = F_SHRINK
1175 CODE: 1783 CODE:
1176{ 1784 RETVAL = self->max_size;
1177 UV *uv = SvJSON (self);
1178 if (enable)
1179 *uv |= ix;
1180 else
1181 *uv &= ~ix;
1182
1183 RETVAL = newSVsv (self);
1184}
1185 OUTPUT: 1785 OUTPUT:
1186 RETVAL 1786 RETVAL
1187 1787
1188SV *max_depth (SV *self, UV max_depth = 0x80000000UL) 1788void filter_json_object (JSON *self, SV *cb = &PL_sv_undef)
1789 PPCODE:
1790{
1791 SvREFCNT_dec (self->cb_object);
1792 self->cb_object = SvOK (cb) ? newSVsv (cb) : 0;
1793
1794 XPUSHs (ST (0));
1795}
1796
1797void filter_json_single_key_object (JSON *self, SV *key, SV *cb = &PL_sv_undef)
1798 PPCODE:
1799{
1800 if (!self->cb_sk_object)
1801 self->cb_sk_object = newHV ();
1802
1803 if (SvOK (cb))
1804 hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1805 else
1806 {
1807 hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
1808
1809 if (!HvKEYS (self->cb_sk_object))
1810 {
1811 SvREFCNT_dec (self->cb_sk_object);
1812 self->cb_sk_object = 0;
1813 }
1814 }
1815
1816 XPUSHs (ST (0));
1817}
1818
1819void encode (JSON *self, SV *scalar)
1820 PPCODE:
1821 XPUSHs (encode_json (scalar, self));
1822
1823void decode (JSON *self, SV *jsonstr)
1824 PPCODE:
1825 XPUSHs (decode_json (jsonstr, self, 0));
1826
1827void decode_prefix (JSON *self, SV *jsonstr)
1828 PPCODE:
1829{
1830 char *offset;
1831 EXTEND (SP, 2);
1832 PUSHs (decode_json (jsonstr, self, &offset));
1833 PUSHs (sv_2mortal (newSVuv (ptr_to_index (jsonstr, offset))));
1834}
1835
1836void incr_parse (JSON *self, SV *jsonstr = 0)
1837 PPCODE:
1838{
1839 if (!self->incr_text)
1840 self->incr_text = newSVpvn ("", 0);
1841
1842 // append data, if any
1843 if (jsonstr)
1844 {
1845 if (SvUTF8 (jsonstr))
1846 {
1847 if (!SvUTF8 (self->incr_text))
1848 {
1849 /* utf-8-ness differs, need to upgrade */
1850 sv_utf8_upgrade (self->incr_text);
1851
1852 if (self->incr_pos)
1853 self->incr_pos = utf8_hop ((U8 *)SvPVX (self->incr_text), self->incr_pos)
1854 - (U8 *)SvPVX (self->incr_text);
1855 }
1856 }
1857 else if (SvUTF8 (self->incr_text))
1858 sv_utf8_upgrade (jsonstr);
1859
1860 {
1861 STRLEN len;
1862 const char *str = SvPV (jsonstr, len);
1863 STRLEN cur = SvCUR (self->incr_text);
1864
1865 if (SvLEN (self->incr_text) <= cur + len)
1866 SvGROW (self->incr_text, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
1867
1868 Move (str, SvEND (self->incr_text), len, char);
1869 SvCUR_set (self->incr_text, SvCUR (self->incr_text) + len);
1870 *SvEND (self->incr_text) = 0; // this should basically be a nop, too, but make sure it's there
1871 }
1872 }
1873
1874 if (GIMME_V != G_VOID)
1875 do
1876 {
1877 char *offset;
1878
1879 if (!INCR_DONE (self))
1880 {
1881 incr_parse (self);
1882
1883 if (self->incr_pos > self->max_size && self->max_size)
1884 croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
1885 (unsigned long)self->incr_pos, (unsigned long)self->max_size);
1886
1887 if (!INCR_DONE (self))
1888 break;
1889 }
1890
1891 XPUSHs (decode_json (self->incr_text, self, &offset));
1892
1893 self->incr_pos -= offset - SvPVX (self->incr_text);
1894 self->incr_nest = 0;
1895 self->incr_mode = 0;
1896
1897 sv_chop (self->incr_text, offset);
1898 }
1899 while (GIMME_V == G_ARRAY);
1900}
1901
1902SV *incr_text (JSON *self)
1903 ATTRS: lvalue
1189 CODE: 1904 CODE:
1190{ 1905{
1191 UV *uv = SvJSON (self); 1906 if (self->incr_pos)
1192 UV log2 = 0; 1907 croak ("incr_text can not be called when the incremental parser already started parsing");
1193 1908
1194 if (max_depth > 0x80000000UL) max_depth = 0x80000000UL; 1909 RETVAL = self->incr_text ? SvREFCNT_inc (self->incr_text) : &PL_sv_undef;
1195
1196 while ((1UL << log2) < max_depth)
1197 ++log2;
1198
1199 *uv = *uv & ~F_MAXDEPTH | (log2 << S_MAXDEPTH);
1200
1201 RETVAL = newSVsv (self);
1202} 1910}
1203 OUTPUT: 1911 OUTPUT:
1204 RETVAL 1912 RETVAL
1205 1913
1914void incr_skip (JSON *self)
1915 CODE:
1916{
1917 if (self->incr_pos)
1918 {
1919 sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + self->incr_pos);
1920 self->incr_pos = 0;
1921 self->incr_nest = 0;
1922 self->incr_mode = 0;
1923 }
1924}
1925
1926void incr_reset (JSON *self)
1927 CODE:
1928{
1929 SvREFCNT_dec (self->incr_text);
1930 self->incr_text = 0;
1931 self->incr_pos = 0;
1932 self->incr_nest = 0;
1933 self->incr_mode = 0;
1934}
1935
1936void DESTROY (JSON *self)
1937 CODE:
1938 SvREFCNT_dec (self->cb_sk_object);
1939 SvREFCNT_dec (self->cb_object);
1940 SvREFCNT_dec (self->incr_text);
1941
1942PROTOTYPES: ENABLE
1943
1206void encode (SV *self, SV *scalar) 1944void encode_json (SV *scalar)
1945 ALIAS:
1946 to_json_ = 0
1947 encode_json = F_UTF8
1207 PPCODE: 1948 PPCODE:
1949{
1950 JSON json;
1951 json_init (&json);
1952 json.flags |= ix;
1208 XPUSHs (encode_json (scalar, *SvJSON (self))); 1953 XPUSHs (encode_json (scalar, &json));
1954}
1209 1955
1210void decode (SV *self, SV *jsonstr) 1956void decode_json (SV *jsonstr)
1957 ALIAS:
1958 from_json_ = 0
1959 decode_json = F_UTF8
1211 PPCODE: 1960 PPCODE:
1961{
1962 JSON json;
1963 json_init (&json);
1964 json.flags |= ix;
1212 XPUSHs (decode_json (jsonstr, *SvJSON (self), 0)); 1965 XPUSHs (decode_json (jsonstr, &json, 0));
1213
1214void decode_prefix (SV *self, SV *jsonstr)
1215 PPCODE:
1216{
1217 UV offset;
1218 EXTEND (SP, 2);
1219 PUSHs (decode_json (jsonstr, *SvJSON (self), &offset));
1220 PUSHs (sv_2mortal (newSVuv (offset)));
1221} 1966}
1222 1967
1223PROTOTYPES: ENABLE
1224 1968
1225void to_json (SV *scalar)
1226 ALIAS:
1227 objToJson = 0
1228 PPCODE:
1229 XPUSHs (encode_json (scalar, F_DEFAULT | F_UTF8));
1230
1231void from_json (SV *jsonstr)
1232 ALIAS:
1233 jsonToObj = 0
1234 PPCODE:
1235 XPUSHs (decode_json (jsonstr, F_DEFAULT | F_UTF8, 0));
1236

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