1 |
#include "EXTERN.h" |
2 |
#include "perl.h" |
3 |
#include "XSUB.h" |
4 |
|
5 |
#include <assert.h> |
6 |
#include <string.h> |
7 |
#include <stdlib.h> |
8 |
#include <stdio.h> |
9 |
#include <float.h> |
10 |
|
11 |
#if defined(__BORLANDC__) || defined(_MSC_VER) |
12 |
# define snprintf _snprintf // C compilers have this in stdio.h |
13 |
#endif |
14 |
|
15 |
// some old perls do not have this, try to make it work, no |
16 |
// guarentees, though. if it breaks, you get to keep the pieces. |
17 |
#ifndef UTF8_MAXBYTES |
18 |
# define UTF8_MAXBYTES 13 |
19 |
#endif |
20 |
|
21 |
#define F_ASCII 0x00000001UL |
22 |
#define F_LATIN1 0x00000002UL |
23 |
#define F_UTF8 0x00000004UL |
24 |
#define F_INDENT 0x00000008UL |
25 |
#define F_CANONICAL 0x00000010UL |
26 |
#define F_SPACE_BEFORE 0x00000020UL |
27 |
#define F_SPACE_AFTER 0x00000040UL |
28 |
#define F_ALLOW_NONREF 0x00000100UL |
29 |
#define F_SHRINK 0x00000200UL |
30 |
#define F_ALLOW_BLESSED 0x00000400UL |
31 |
#define F_CONV_BLESSED 0x00000800UL |
32 |
#define F_MAXDEPTH 0xf8000000UL |
33 |
#define S_MAXDEPTH 27 |
34 |
#define F_MAXSIZE 0x01f00000UL |
35 |
#define S_MAXSIZE 20 |
36 |
#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing |
37 |
|
38 |
#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH)) |
39 |
#define DEC_SIZE(flags) (1UL << ((flags & F_MAXSIZE ) >> S_MAXSIZE )) |
40 |
|
41 |
#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER |
42 |
#define F_DEFAULT (9UL << S_MAXDEPTH) |
43 |
|
44 |
#define INIT_SIZE 32 // initial scalar size to be allocated |
45 |
#define INDENT_STEP 3 // spaces per indentation level |
46 |
|
47 |
#define SHORT_STRING_LEN 16384 // special-case strings of up to this size |
48 |
|
49 |
#define SB do { |
50 |
#define SE } while (0) |
51 |
|
52 |
#if __GNUC__ >= 3 |
53 |
# define expect(expr,value) __builtin_expect ((expr),(value)) |
54 |
# define inline inline |
55 |
#else |
56 |
# define expect(expr,value) (expr) |
57 |
# define inline static |
58 |
#endif |
59 |
|
60 |
#define expect_false(expr) expect ((expr) != 0, 0) |
61 |
#define expect_true(expr) expect ((expr) != 0, 1) |
62 |
|
63 |
#ifdef USE_ITHREADS |
64 |
# define JSON_SLOW 1 |
65 |
# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1)) |
66 |
#else |
67 |
# define JSON_SLOW 0 |
68 |
# define JSON_STASH json_stash |
69 |
#endif |
70 |
|
71 |
static HV *json_stash, *json_boolean_stash; // JSON::XS:: |
72 |
static SV *json_true, *json_false; |
73 |
|
74 |
typedef struct { |
75 |
U32 flags; |
76 |
SV *cb_object; |
77 |
HV *cb_sk_object; |
78 |
} JSON; |
79 |
|
80 |
///////////////////////////////////////////////////////////////////////////// |
81 |
// utility functions |
82 |
|
83 |
inline void |
84 |
shrink (SV *sv) |
85 |
{ |
86 |
sv_utf8_downgrade (sv, 1); |
87 |
if (SvLEN (sv) > SvCUR (sv) + 1) |
88 |
{ |
89 |
#ifdef SvPV_shrink_to_cur |
90 |
SvPV_shrink_to_cur (sv); |
91 |
#elif defined (SvPV_renew) |
92 |
SvPV_renew (sv, SvCUR (sv) + 1); |
93 |
#endif |
94 |
} |
95 |
} |
96 |
|
97 |
// decode an utf-8 character and return it, or (UV)-1 in |
98 |
// case of an error. |
99 |
// we special-case "safe" characters from U+80 .. U+7FF, |
100 |
// but use the very good perl function to parse anything else. |
101 |
// note that we never call this function for a ascii codepoints |
102 |
inline UV |
103 |
decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen) |
104 |
{ |
105 |
if (expect_false (s[0] > 0xdf || s[0] < 0xc2)) |
106 |
return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY); |
107 |
else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf) |
108 |
{ |
109 |
*clen = 2; |
110 |
return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f); |
111 |
} |
112 |
else |
113 |
{ |
114 |
*clen = (STRLEN)-1; |
115 |
return (UV)-1; |
116 |
} |
117 |
} |
118 |
|
119 |
///////////////////////////////////////////////////////////////////////////// |
120 |
// encoder |
121 |
|
122 |
// structure used for encoding JSON |
123 |
typedef struct |
124 |
{ |
125 |
char *cur; // SvPVX (sv) + current output position |
126 |
char *end; // SvEND (sv) |
127 |
SV *sv; // result scalar |
128 |
JSON json; |
129 |
U32 indent; // indentation level |
130 |
U32 maxdepth; // max. indentation/recursion level |
131 |
} enc_t; |
132 |
|
133 |
inline void |
134 |
need (enc_t *enc, STRLEN len) |
135 |
{ |
136 |
if (expect_false (enc->cur + len >= enc->end)) |
137 |
{ |
138 |
STRLEN cur = enc->cur - SvPVX (enc->sv); |
139 |
SvGROW (enc->sv, cur + len + 1); |
140 |
enc->cur = SvPVX (enc->sv) + cur; |
141 |
enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1; |
142 |
} |
143 |
} |
144 |
|
145 |
inline void |
146 |
encode_ch (enc_t *enc, char ch) |
147 |
{ |
148 |
need (enc, 1); |
149 |
*enc->cur++ = ch; |
150 |
} |
151 |
|
152 |
static void |
153 |
encode_str (enc_t *enc, char *str, STRLEN len, int is_utf8) |
154 |
{ |
155 |
char *end = str + len; |
156 |
|
157 |
need (enc, len); |
158 |
|
159 |
while (str < end) |
160 |
{ |
161 |
unsigned char ch = *(unsigned char *)str; |
162 |
|
163 |
if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case |
164 |
{ |
165 |
if (expect_false (ch == '"')) // but with slow exceptions |
166 |
{ |
167 |
need (enc, len += 1); |
168 |
*enc->cur++ = '\\'; |
169 |
*enc->cur++ = '"'; |
170 |
} |
171 |
else if (expect_false (ch == '\\')) |
172 |
{ |
173 |
need (enc, len += 1); |
174 |
*enc->cur++ = '\\'; |
175 |
*enc->cur++ = '\\'; |
176 |
} |
177 |
else |
178 |
*enc->cur++ = ch; |
179 |
|
180 |
++str; |
181 |
} |
182 |
else |
183 |
{ |
184 |
switch (ch) |
185 |
{ |
186 |
case '\010': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'b'; ++str; break; |
187 |
case '\011': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 't'; ++str; break; |
188 |
case '\012': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'n'; ++str; break; |
189 |
case '\014': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'f'; ++str; break; |
190 |
case '\015': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'r'; ++str; break; |
191 |
|
192 |
default: |
193 |
{ |
194 |
STRLEN clen; |
195 |
UV uch; |
196 |
|
197 |
if (is_utf8) |
198 |
{ |
199 |
uch = decode_utf8 (str, end - str, &clen); |
200 |
if (clen == (STRLEN)-1) |
201 |
croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str); |
202 |
} |
203 |
else |
204 |
{ |
205 |
uch = ch; |
206 |
clen = 1; |
207 |
} |
208 |
|
209 |
if (uch > 0x10FFFFUL) |
210 |
croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch); |
211 |
|
212 |
if (uch < 0x80 || enc->json.flags & F_ASCII || (enc->json.flags & F_LATIN1 && uch > 0xFF)) |
213 |
{ |
214 |
if (uch > 0xFFFFUL) |
215 |
{ |
216 |
need (enc, len += 11); |
217 |
sprintf (enc->cur, "\\u%04x\\u%04x", |
218 |
(int)((uch - 0x10000) / 0x400 + 0xD800), |
219 |
(int)((uch - 0x10000) % 0x400 + 0xDC00)); |
220 |
enc->cur += 12; |
221 |
} |
222 |
else |
223 |
{ |
224 |
static char hexdigit [16] = "0123456789abcdef"; |
225 |
need (enc, len += 5); |
226 |
*enc->cur++ = '\\'; |
227 |
*enc->cur++ = 'u'; |
228 |
*enc->cur++ = hexdigit [ uch >> 12 ]; |
229 |
*enc->cur++ = hexdigit [(uch >> 8) & 15]; |
230 |
*enc->cur++ = hexdigit [(uch >> 4) & 15]; |
231 |
*enc->cur++ = hexdigit [(uch >> 0) & 15]; |
232 |
} |
233 |
|
234 |
str += clen; |
235 |
} |
236 |
else if (enc->json.flags & F_LATIN1) |
237 |
{ |
238 |
*enc->cur++ = uch; |
239 |
str += clen; |
240 |
} |
241 |
else if (is_utf8) |
242 |
{ |
243 |
need (enc, len += clen); |
244 |
do |
245 |
{ |
246 |
*enc->cur++ = *str++; |
247 |
} |
248 |
while (--clen); |
249 |
} |
250 |
else |
251 |
{ |
252 |
need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed |
253 |
enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0); |
254 |
++str; |
255 |
} |
256 |
} |
257 |
} |
258 |
} |
259 |
|
260 |
--len; |
261 |
} |
262 |
} |
263 |
|
264 |
inline void |
265 |
encode_indent (enc_t *enc) |
266 |
{ |
267 |
if (enc->json.flags & F_INDENT) |
268 |
{ |
269 |
int spaces = enc->indent * INDENT_STEP; |
270 |
|
271 |
need (enc, spaces); |
272 |
memset (enc->cur, ' ', spaces); |
273 |
enc->cur += spaces; |
274 |
} |
275 |
} |
276 |
|
277 |
inline void |
278 |
encode_space (enc_t *enc) |
279 |
{ |
280 |
need (enc, 1); |
281 |
encode_ch (enc, ' '); |
282 |
} |
283 |
|
284 |
inline void |
285 |
encode_nl (enc_t *enc) |
286 |
{ |
287 |
if (enc->json.flags & F_INDENT) |
288 |
{ |
289 |
need (enc, 1); |
290 |
encode_ch (enc, '\n'); |
291 |
} |
292 |
} |
293 |
|
294 |
inline void |
295 |
encode_comma (enc_t *enc) |
296 |
{ |
297 |
encode_ch (enc, ','); |
298 |
|
299 |
if (enc->json.flags & F_INDENT) |
300 |
encode_nl (enc); |
301 |
else if (enc->json.flags & F_SPACE_AFTER) |
302 |
encode_space (enc); |
303 |
} |
304 |
|
305 |
static void encode_sv (enc_t *enc, SV *sv); |
306 |
|
307 |
static void |
308 |
encode_av (enc_t *enc, AV *av) |
309 |
{ |
310 |
int i, len = av_len (av); |
311 |
|
312 |
if (enc->indent >= enc->maxdepth) |
313 |
croak ("data structure too deep (hit recursion limit)"); |
314 |
|
315 |
encode_ch (enc, '['); encode_nl (enc); |
316 |
++enc->indent; |
317 |
|
318 |
for (i = 0; i <= len; ++i) |
319 |
{ |
320 |
SV **svp = av_fetch (av, i, 0); |
321 |
|
322 |
encode_indent (enc); |
323 |
|
324 |
if (svp) |
325 |
encode_sv (enc, *svp); |
326 |
else |
327 |
encode_str (enc, "null", 4, 0); |
328 |
|
329 |
if (i < len) |
330 |
encode_comma (enc); |
331 |
} |
332 |
|
333 |
encode_nl (enc); |
334 |
|
335 |
--enc->indent; |
336 |
encode_indent (enc); encode_ch (enc, ']'); |
337 |
} |
338 |
|
339 |
static void |
340 |
encode_he (enc_t *enc, HE *he) |
341 |
{ |
342 |
encode_ch (enc, '"'); |
343 |
|
344 |
if (HeKLEN (he) == HEf_SVKEY) |
345 |
{ |
346 |
SV *sv = HeSVKEY (he); |
347 |
STRLEN len; |
348 |
char *str; |
349 |
|
350 |
SvGETMAGIC (sv); |
351 |
str = SvPV (sv, len); |
352 |
|
353 |
encode_str (enc, str, len, SvUTF8 (sv)); |
354 |
} |
355 |
else |
356 |
encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he)); |
357 |
|
358 |
encode_ch (enc, '"'); |
359 |
|
360 |
if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc); |
361 |
encode_ch (enc, ':'); |
362 |
if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc); |
363 |
encode_sv (enc, HeVAL (he)); |
364 |
} |
365 |
|
366 |
// compare hash entries, used when all keys are bytestrings |
367 |
static int |
368 |
he_cmp_fast (const void *a_, const void *b_) |
369 |
{ |
370 |
int cmp; |
371 |
|
372 |
HE *a = *(HE **)a_; |
373 |
HE *b = *(HE **)b_; |
374 |
|
375 |
STRLEN la = HeKLEN (a); |
376 |
STRLEN lb = HeKLEN (b); |
377 |
|
378 |
if (!(cmp = memcmp (HeKEY (a), HeKEY (b), la < lb ? la : lb))) |
379 |
cmp = la - lb; |
380 |
|
381 |
return cmp; |
382 |
} |
383 |
|
384 |
// compare hash entries, used when some keys are sv's or utf-x |
385 |
static int |
386 |
he_cmp_slow (const void *a, const void *b) |
387 |
{ |
388 |
return sv_cmp (HeSVKEY_force (*(HE **)a), HeSVKEY_force (*(HE **)b)); |
389 |
} |
390 |
|
391 |
static void |
392 |
encode_hv (enc_t *enc, HV *hv) |
393 |
{ |
394 |
int count, i; |
395 |
|
396 |
if (enc->indent >= enc->maxdepth) |
397 |
croak ("data structure too deep (hit recursion limit)"); |
398 |
|
399 |
encode_ch (enc, '{'); encode_nl (enc); ++enc->indent; |
400 |
|
401 |
if ((count = hv_iterinit (hv))) |
402 |
{ |
403 |
// for canonical output we have to sort by keys first |
404 |
// actually, this is mostly due to the stupid so-called |
405 |
// security workaround added somewhere in 5.8.x. |
406 |
// that randomises hash orderings |
407 |
if (enc->json.flags & F_CANONICAL) |
408 |
{ |
409 |
int fast = 1; |
410 |
HE *he; |
411 |
#if defined(__BORLANDC__) || defined(_MSC_VER) |
412 |
HE **hes = _alloca (count * sizeof (HE)); |
413 |
#else |
414 |
HE *hes [count]; // if your compiler dies here, you need to enable C99 mode |
415 |
#endif |
416 |
|
417 |
i = 0; |
418 |
while ((he = hv_iternext (hv))) |
419 |
{ |
420 |
hes [i++] = he; |
421 |
if (HeKLEN (he) < 0 || HeKUTF8 (he)) |
422 |
fast = 0; |
423 |
} |
424 |
|
425 |
assert (i == count); |
426 |
|
427 |
if (fast) |
428 |
qsort (hes, count, sizeof (HE *), he_cmp_fast); |
429 |
else |
430 |
{ |
431 |
// hack to forcefully disable "use bytes" |
432 |
COP cop = *PL_curcop; |
433 |
cop.op_private = 0; |
434 |
|
435 |
ENTER; |
436 |
SAVETMPS; |
437 |
|
438 |
SAVEVPTR (PL_curcop); |
439 |
PL_curcop = &cop; |
440 |
|
441 |
qsort (hes, count, sizeof (HE *), he_cmp_slow); |
442 |
|
443 |
FREETMPS; |
444 |
LEAVE; |
445 |
} |
446 |
|
447 |
for (i = 0; i < count; ++i) |
448 |
{ |
449 |
encode_indent (enc); |
450 |
encode_he (enc, hes [i]); |
451 |
|
452 |
if (i < count - 1) |
453 |
encode_comma (enc); |
454 |
} |
455 |
|
456 |
encode_nl (enc); |
457 |
} |
458 |
else |
459 |
{ |
460 |
HE *he = hv_iternext (hv); |
461 |
|
462 |
for (;;) |
463 |
{ |
464 |
encode_indent (enc); |
465 |
encode_he (enc, he); |
466 |
|
467 |
if (!(he = hv_iternext (hv))) |
468 |
break; |
469 |
|
470 |
encode_comma (enc); |
471 |
} |
472 |
|
473 |
encode_nl (enc); |
474 |
} |
475 |
} |
476 |
|
477 |
--enc->indent; encode_indent (enc); encode_ch (enc, '}'); |
478 |
} |
479 |
|
480 |
// encode objects, arrays and special \0=false and \1=true values. |
481 |
static void |
482 |
encode_rv (enc_t *enc, SV *sv) |
483 |
{ |
484 |
svtype svt; |
485 |
|
486 |
SvGETMAGIC (sv); |
487 |
svt = SvTYPE (sv); |
488 |
|
489 |
if (expect_false (SvOBJECT (sv))) |
490 |
{ |
491 |
HV *stash = !JSON_SLOW || json_boolean_stash |
492 |
? json_boolean_stash |
493 |
: gv_stashpv ("JSON::XS::Boolean", 1); |
494 |
|
495 |
if (SvSTASH (sv) == stash) |
496 |
{ |
497 |
if (SvIV (sv)) |
498 |
encode_str (enc, "true", 4, 0); |
499 |
else |
500 |
encode_str (enc, "false", 5, 0); |
501 |
} |
502 |
else |
503 |
{ |
504 |
#if 0 |
505 |
if (0 && sv_derived_from (rv, "JSON::Literal")) |
506 |
{ |
507 |
// not yet |
508 |
} |
509 |
#endif |
510 |
if (enc->json.flags & F_CONV_BLESSED) |
511 |
{ |
512 |
// we re-bless the reference to get overload and other niceties right |
513 |
GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 0); |
514 |
|
515 |
if (to_json) |
516 |
{ |
517 |
dSP; |
518 |
|
519 |
ENTER; SAVETMPS; PUSHMARK (SP); |
520 |
XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv))); |
521 |
|
522 |
// calling with G_SCALAR ensures that we always get a 1 return value |
523 |
PUTBACK; |
524 |
call_sv ((SV *)GvCV (to_json), G_SCALAR); |
525 |
SPAGAIN; |
526 |
|
527 |
// catch this surprisingly common error |
528 |
if (SvROK (TOPs) && SvRV (TOPs) == sv) |
529 |
croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv))); |
530 |
|
531 |
sv = POPs; |
532 |
PUTBACK; |
533 |
|
534 |
encode_sv (enc, sv); |
535 |
|
536 |
FREETMPS; LEAVE; |
537 |
} |
538 |
else if (enc->json.flags & F_ALLOW_BLESSED) |
539 |
encode_str (enc, "null", 4, 0); |
540 |
else |
541 |
croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it", |
542 |
SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
543 |
} |
544 |
else if (enc->json.flags & F_ALLOW_BLESSED) |
545 |
encode_str (enc, "null", 4, 0); |
546 |
else |
547 |
croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled", |
548 |
SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
549 |
} |
550 |
} |
551 |
else if (svt == SVt_PVHV) |
552 |
encode_hv (enc, (HV *)sv); |
553 |
else if (svt == SVt_PVAV) |
554 |
encode_av (enc, (AV *)sv); |
555 |
else if (svt < SVt_PVAV) |
556 |
{ |
557 |
STRLEN len = 0; |
558 |
char *pv = svt ? SvPV (sv, len) : 0; |
559 |
|
560 |
if (len == 1 && *pv == '1') |
561 |
encode_str (enc, "true", 4, 0); |
562 |
else if (len == 1 && *pv == '0') |
563 |
encode_str (enc, "false", 5, 0); |
564 |
else |
565 |
croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1", |
566 |
SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
567 |
} |
568 |
else |
569 |
croak ("encountered %s, but JSON can only represent references to arrays or hashes", |
570 |
SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
571 |
} |
572 |
|
573 |
static void |
574 |
encode_sv (enc_t *enc, SV *sv) |
575 |
{ |
576 |
SvGETMAGIC (sv); |
577 |
|
578 |
if (SvPOKp (sv)) |
579 |
{ |
580 |
STRLEN len; |
581 |
char *str = SvPV (sv, len); |
582 |
encode_ch (enc, '"'); |
583 |
encode_str (enc, str, len, SvUTF8 (sv)); |
584 |
encode_ch (enc, '"'); |
585 |
} |
586 |
else if (SvNOKp (sv)) |
587 |
{ |
588 |
// trust that perl will do the right thing w.r.t. JSON syntax. |
589 |
need (enc, NV_DIG + 32); |
590 |
Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur); |
591 |
enc->cur += strlen (enc->cur); |
592 |
} |
593 |
else if (SvIOKp (sv)) |
594 |
{ |
595 |
// we assume we can always read an IV as a UV |
596 |
if (SvUV (sv) & ~(UV)0x7fff) |
597 |
{ |
598 |
// large integer, use the (rather slow) snprintf way. |
599 |
need (enc, sizeof (UV) * 3); |
600 |
enc->cur += |
601 |
SvIsUV(sv) |
602 |
? snprintf (enc->cur, sizeof (UV) * 3, "%"UVuf, (UV)SvUVX (sv)) |
603 |
: snprintf (enc->cur, sizeof (UV) * 3, "%"IVdf, (IV)SvIVX (sv)); |
604 |
} |
605 |
else |
606 |
{ |
607 |
// optimise the "small number case" |
608 |
// code will likely be branchless and use only a single multiplication |
609 |
I32 i = SvIV (sv); |
610 |
U32 u; |
611 |
char digit, nz = 0; |
612 |
|
613 |
need (enc, 6); |
614 |
|
615 |
*enc->cur = '-'; enc->cur += i < 0 ? 1 : 0; |
616 |
u = i < 0 ? -i : i; |
617 |
|
618 |
// convert to 4.28 fixed-point representation |
619 |
u = u * ((0xfffffff + 10000) / 10000); // 10**5, 5 fractional digits |
620 |
|
621 |
// now output digit by digit, each time masking out the integer part |
622 |
// and multiplying by 5 while moving the decimal point one to the right, |
623 |
// resulting in a net multiplication by 10. |
624 |
// we always write the digit to memory but conditionally increment |
625 |
// the pointer, to ease the usage of conditional move instructions. |
626 |
digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffff) * 5; |
627 |
digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffff) * 5; |
628 |
digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffff) * 5; |
629 |
digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffff) * 5; |
630 |
digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0' |
631 |
} |
632 |
} |
633 |
else if (SvROK (sv)) |
634 |
encode_rv (enc, SvRV (sv)); |
635 |
else if (!SvOK (sv)) |
636 |
encode_str (enc, "null", 4, 0); |
637 |
else |
638 |
croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this", |
639 |
SvPV_nolen (sv), SvFLAGS (sv)); |
640 |
} |
641 |
|
642 |
static SV * |
643 |
encode_json (SV *scalar, JSON *json) |
644 |
{ |
645 |
enc_t enc; |
646 |
|
647 |
if (!(json->flags & F_ALLOW_NONREF) && !SvROK (scalar)) |
648 |
croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)"); |
649 |
|
650 |
enc.json = *json; |
651 |
enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); |
652 |
enc.cur = SvPVX (enc.sv); |
653 |
enc.end = SvEND (enc.sv); |
654 |
enc.indent = 0; |
655 |
enc.maxdepth = DEC_DEPTH (enc.json.flags); |
656 |
|
657 |
SvPOK_only (enc.sv); |
658 |
encode_sv (&enc, scalar); |
659 |
|
660 |
SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); |
661 |
*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings |
662 |
|
663 |
if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8))) |
664 |
SvUTF8_on (enc.sv); |
665 |
|
666 |
if (enc.json.flags & F_SHRINK) |
667 |
shrink (enc.sv); |
668 |
|
669 |
return enc.sv; |
670 |
} |
671 |
|
672 |
///////////////////////////////////////////////////////////////////////////// |
673 |
// decoder |
674 |
|
675 |
// structure used for decoding JSON |
676 |
typedef struct |
677 |
{ |
678 |
char *cur; // current parser pointer |
679 |
char *end; // end of input string |
680 |
const char *err; // parse error, if != 0 |
681 |
JSON json; |
682 |
U32 depth; // recursion depth |
683 |
U32 maxdepth; // recursion depth limit |
684 |
} dec_t; |
685 |
|
686 |
inline void |
687 |
decode_ws (dec_t *dec) |
688 |
{ |
689 |
for (;;) |
690 |
{ |
691 |
char ch = *dec->cur; |
692 |
|
693 |
if (ch > 0x20 |
694 |
|| (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)) |
695 |
break; |
696 |
|
697 |
++dec->cur; |
698 |
} |
699 |
} |
700 |
|
701 |
#define ERR(reason) SB dec->err = reason; goto fail; SE |
702 |
|
703 |
#define EXPECT_CH(ch) SB \ |
704 |
if (*dec->cur != ch) \ |
705 |
ERR (# ch " expected"); \ |
706 |
++dec->cur; \ |
707 |
SE |
708 |
|
709 |
#define DEC_INC_DEPTH if (++dec->depth > dec->maxdepth) ERR ("json datastructure exceeds maximum nesting level (set a higher max_depth)") |
710 |
#define DEC_DEC_DEPTH --dec->depth |
711 |
|
712 |
static SV *decode_sv (dec_t *dec); |
713 |
|
714 |
static signed char decode_hexdigit[256]; |
715 |
|
716 |
static UV |
717 |
decode_4hex (dec_t *dec) |
718 |
{ |
719 |
signed char d1, d2, d3, d4; |
720 |
unsigned char *cur = (unsigned char *)dec->cur; |
721 |
|
722 |
d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("exactly four hexadecimal digits expected"); |
723 |
d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("exactly four hexadecimal digits expected"); |
724 |
d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("exactly four hexadecimal digits expected"); |
725 |
d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("exactly four hexadecimal digits expected"); |
726 |
|
727 |
dec->cur += 4; |
728 |
|
729 |
return ((UV)d1) << 12 |
730 |
| ((UV)d2) << 8 |
731 |
| ((UV)d3) << 4 |
732 |
| ((UV)d4); |
733 |
|
734 |
fail: |
735 |
return (UV)-1; |
736 |
} |
737 |
|
738 |
static SV * |
739 |
decode_str (dec_t *dec) |
740 |
{ |
741 |
SV *sv = 0; |
742 |
int utf8 = 0; |
743 |
char *dec_cur = dec->cur; |
744 |
|
745 |
do |
746 |
{ |
747 |
char buf [SHORT_STRING_LEN + UTF8_MAXBYTES]; |
748 |
char *cur = buf; |
749 |
|
750 |
do |
751 |
{ |
752 |
unsigned char ch = *(unsigned char *)dec_cur++; |
753 |
|
754 |
if (expect_false (ch == '"')) |
755 |
{ |
756 |
--dec_cur; |
757 |
break; |
758 |
} |
759 |
else if (expect_false (ch == '\\')) |
760 |
{ |
761 |
switch (*dec_cur) |
762 |
{ |
763 |
case '\\': |
764 |
case '/': |
765 |
case '"': *cur++ = *dec_cur++; break; |
766 |
|
767 |
case 'b': ++dec_cur; *cur++ = '\010'; break; |
768 |
case 't': ++dec_cur; *cur++ = '\011'; break; |
769 |
case 'n': ++dec_cur; *cur++ = '\012'; break; |
770 |
case 'f': ++dec_cur; *cur++ = '\014'; break; |
771 |
case 'r': ++dec_cur; *cur++ = '\015'; break; |
772 |
|
773 |
case 'u': |
774 |
{ |
775 |
UV lo, hi; |
776 |
++dec_cur; |
777 |
|
778 |
dec->cur = dec_cur; |
779 |
hi = decode_4hex (dec); |
780 |
dec_cur = dec->cur; |
781 |
if (hi == (UV)-1) |
782 |
goto fail; |
783 |
|
784 |
// possibly a surrogate pair |
785 |
if (hi >= 0xd800) |
786 |
if (hi < 0xdc00) |
787 |
{ |
788 |
if (dec_cur [0] != '\\' || dec_cur [1] != 'u') |
789 |
ERR ("missing low surrogate character in surrogate pair"); |
790 |
|
791 |
dec_cur += 2; |
792 |
|
793 |
dec->cur = dec_cur; |
794 |
lo = decode_4hex (dec); |
795 |
dec_cur = dec->cur; |
796 |
if (lo == (UV)-1) |
797 |
goto fail; |
798 |
|
799 |
if (lo < 0xdc00 || lo >= 0xe000) |
800 |
ERR ("surrogate pair expected"); |
801 |
|
802 |
hi = (hi - 0xD800) * 0x400 + (lo - 0xDC00) + 0x10000; |
803 |
} |
804 |
else if (hi < 0xe000) |
805 |
ERR ("missing high surrogate character in surrogate pair"); |
806 |
|
807 |
if (hi >= 0x80) |
808 |
{ |
809 |
utf8 = 1; |
810 |
|
811 |
cur = (char *)uvuni_to_utf8_flags (cur, hi, 0); |
812 |
} |
813 |
else |
814 |
*cur++ = hi; |
815 |
} |
816 |
break; |
817 |
|
818 |
default: |
819 |
--dec_cur; |
820 |
ERR ("illegal backslash escape sequence in string"); |
821 |
} |
822 |
} |
823 |
else if (expect_true (ch >= 0x20 && ch <= 0x7f)) |
824 |
*cur++ = ch; |
825 |
else if (ch >= 0x80) |
826 |
{ |
827 |
STRLEN clen; |
828 |
UV uch; |
829 |
|
830 |
--dec_cur; |
831 |
|
832 |
uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen); |
833 |
if (clen == (STRLEN)-1) |
834 |
ERR ("malformed UTF-8 character in JSON string"); |
835 |
|
836 |
do |
837 |
*cur++ = *dec_cur++; |
838 |
while (--clen); |
839 |
|
840 |
utf8 = 1; |
841 |
} |
842 |
else |
843 |
{ |
844 |
--dec_cur; |
845 |
|
846 |
if (!ch) |
847 |
ERR ("unexpected end of string while parsing JSON string"); |
848 |
else |
849 |
ERR ("invalid character encountered while parsing JSON string"); |
850 |
} |
851 |
} |
852 |
while (cur < buf + SHORT_STRING_LEN); |
853 |
|
854 |
{ |
855 |
STRLEN len = cur - buf; |
856 |
|
857 |
if (sv) |
858 |
{ |
859 |
SvGROW (sv, SvCUR (sv) + len + 1); |
860 |
memcpy (SvPVX (sv) + SvCUR (sv), buf, len); |
861 |
SvCUR_set (sv, SvCUR (sv) + len); |
862 |
} |
863 |
else |
864 |
sv = newSVpvn (buf, len); |
865 |
} |
866 |
} |
867 |
while (*dec_cur != '"'); |
868 |
|
869 |
++dec_cur; |
870 |
|
871 |
if (sv) |
872 |
{ |
873 |
SvPOK_only (sv); |
874 |
*SvEND (sv) = 0; |
875 |
|
876 |
if (utf8) |
877 |
SvUTF8_on (sv); |
878 |
} |
879 |
else |
880 |
sv = newSVpvn ("", 0); |
881 |
|
882 |
dec->cur = dec_cur; |
883 |
return sv; |
884 |
|
885 |
fail: |
886 |
dec->cur = dec_cur; |
887 |
return 0; |
888 |
} |
889 |
|
890 |
static SV * |
891 |
decode_num (dec_t *dec) |
892 |
{ |
893 |
int is_nv = 0; |
894 |
char *start = dec->cur; |
895 |
|
896 |
// [minus] |
897 |
if (*dec->cur == '-') |
898 |
++dec->cur; |
899 |
|
900 |
if (*dec->cur == '0') |
901 |
{ |
902 |
++dec->cur; |
903 |
if (*dec->cur >= '0' && *dec->cur <= '9') |
904 |
ERR ("malformed number (leading zero must not be followed by another digit)"); |
905 |
} |
906 |
else if (*dec->cur < '0' || *dec->cur > '9') |
907 |
ERR ("malformed number (no digits after initial minus)"); |
908 |
else |
909 |
do |
910 |
{ |
911 |
++dec->cur; |
912 |
} |
913 |
while (*dec->cur >= '0' && *dec->cur <= '9'); |
914 |
|
915 |
// [frac] |
916 |
if (*dec->cur == '.') |
917 |
{ |
918 |
++dec->cur; |
919 |
|
920 |
if (*dec->cur < '0' || *dec->cur > '9') |
921 |
ERR ("malformed number (no digits after decimal point)"); |
922 |
|
923 |
do |
924 |
{ |
925 |
++dec->cur; |
926 |
} |
927 |
while (*dec->cur >= '0' && *dec->cur <= '9'); |
928 |
|
929 |
is_nv = 1; |
930 |
} |
931 |
|
932 |
// [exp] |
933 |
if (*dec->cur == 'e' || *dec->cur == 'E') |
934 |
{ |
935 |
++dec->cur; |
936 |
|
937 |
if (*dec->cur == '-' || *dec->cur == '+') |
938 |
++dec->cur; |
939 |
|
940 |
if (*dec->cur < '0' || *dec->cur > '9') |
941 |
ERR ("malformed number (no digits after exp sign)"); |
942 |
|
943 |
do |
944 |
{ |
945 |
++dec->cur; |
946 |
} |
947 |
while (*dec->cur >= '0' && *dec->cur <= '9'); |
948 |
|
949 |
is_nv = 1; |
950 |
} |
951 |
|
952 |
if (!is_nv) |
953 |
{ |
954 |
int len = dec->cur - start; |
955 |
|
956 |
// special case the rather common 1..4-digit-int case, assumes 32 bit ints or so |
957 |
if (*start == '-') |
958 |
switch (len) |
959 |
{ |
960 |
case 2: return newSViv (-( start [1] - '0' * 1)); |
961 |
case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11)); |
962 |
case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111)); |
963 |
case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111)); |
964 |
} |
965 |
else |
966 |
switch (len) |
967 |
{ |
968 |
case 1: return newSViv ( start [0] - '0' * 1); |
969 |
case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11); |
970 |
case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111); |
971 |
case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111); |
972 |
} |
973 |
|
974 |
{ |
975 |
UV uv; |
976 |
int numtype = grok_number (start, len, &uv); |
977 |
if (numtype & IS_NUMBER_IN_UV) |
978 |
if (numtype & IS_NUMBER_NEG) |
979 |
{ |
980 |
if (uv < (UV)IV_MIN) |
981 |
return newSViv (-(IV)uv); |
982 |
} |
983 |
else |
984 |
return newSVuv (uv); |
985 |
} |
986 |
|
987 |
len -= *start == '-' ? 1 : 0; |
988 |
|
989 |
// does not fit into IV or UV, try NV |
990 |
if ((sizeof (NV) == sizeof (double) && DBL_DIG >= len) |
991 |
#if defined (LDBL_DIG) |
992 |
|| (sizeof (NV) == sizeof (long double) && LDBL_DIG >= len) |
993 |
#endif |
994 |
) |
995 |
// fits into NV without loss of precision |
996 |
return newSVnv (Atof (start)); |
997 |
|
998 |
// everything else fails, convert it to a string |
999 |
return newSVpvn (start, dec->cur - start); |
1000 |
} |
1001 |
|
1002 |
// loss of precision here |
1003 |
return newSVnv (Atof (start)); |
1004 |
|
1005 |
fail: |
1006 |
return 0; |
1007 |
} |
1008 |
|
1009 |
static SV * |
1010 |
decode_av (dec_t *dec) |
1011 |
{ |
1012 |
AV *av = newAV (); |
1013 |
|
1014 |
DEC_INC_DEPTH; |
1015 |
decode_ws (dec); |
1016 |
|
1017 |
if (*dec->cur == ']') |
1018 |
++dec->cur; |
1019 |
else |
1020 |
for (;;) |
1021 |
{ |
1022 |
SV *value; |
1023 |
|
1024 |
value = decode_sv (dec); |
1025 |
if (!value) |
1026 |
goto fail; |
1027 |
|
1028 |
av_push (av, value); |
1029 |
|
1030 |
decode_ws (dec); |
1031 |
|
1032 |
if (*dec->cur == ']') |
1033 |
{ |
1034 |
++dec->cur; |
1035 |
break; |
1036 |
} |
1037 |
|
1038 |
if (*dec->cur != ',') |
1039 |
ERR (", or ] expected while parsing array"); |
1040 |
|
1041 |
++dec->cur; |
1042 |
} |
1043 |
|
1044 |
DEC_DEC_DEPTH; |
1045 |
return newRV_noinc ((SV *)av); |
1046 |
|
1047 |
fail: |
1048 |
SvREFCNT_dec (av); |
1049 |
DEC_DEC_DEPTH; |
1050 |
return 0; |
1051 |
} |
1052 |
|
1053 |
static SV * |
1054 |
decode_hv (dec_t *dec) |
1055 |
{ |
1056 |
SV *sv; |
1057 |
HV *hv = newHV (); |
1058 |
|
1059 |
DEC_INC_DEPTH; |
1060 |
decode_ws (dec); |
1061 |
|
1062 |
if (*dec->cur == '}') |
1063 |
++dec->cur; |
1064 |
else |
1065 |
for (;;) |
1066 |
{ |
1067 |
decode_ws (dec); EXPECT_CH ('"'); |
1068 |
|
1069 |
// heuristic: assume that |
1070 |
// a) decode_str + hv_store_ent are abysmally slow. |
1071 |
// b) most hash keys are short, simple ascii text. |
1072 |
// => try to "fast-match" such strings to avoid |
1073 |
// the overhead of decode_str + hv_store_ent. |
1074 |
{ |
1075 |
SV *value; |
1076 |
char *p = dec->cur; |
1077 |
char *e = p + 24; // only try up to 24 bytes |
1078 |
|
1079 |
for (;;) |
1080 |
{ |
1081 |
// the >= 0x80 is true on most architectures |
1082 |
if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\') |
1083 |
{ |
1084 |
// slow path, back up and use decode_str |
1085 |
SV *key = decode_str (dec); |
1086 |
if (!key) |
1087 |
goto fail; |
1088 |
|
1089 |
decode_ws (dec); EXPECT_CH (':'); |
1090 |
|
1091 |
value = decode_sv (dec); |
1092 |
if (!value) |
1093 |
{ |
1094 |
SvREFCNT_dec (key); |
1095 |
goto fail; |
1096 |
} |
1097 |
|
1098 |
hv_store_ent (hv, key, value, 0); |
1099 |
SvREFCNT_dec (key); |
1100 |
|
1101 |
break; |
1102 |
} |
1103 |
else if (*p == '"') |
1104 |
{ |
1105 |
// fast path, got a simple key |
1106 |
char *key = dec->cur; |
1107 |
int len = p - key; |
1108 |
dec->cur = p + 1; |
1109 |
|
1110 |
decode_ws (dec); EXPECT_CH (':'); |
1111 |
|
1112 |
value = decode_sv (dec); |
1113 |
if (!value) |
1114 |
goto fail; |
1115 |
|
1116 |
hv_store (hv, key, len, value, 0); |
1117 |
|
1118 |
break; |
1119 |
} |
1120 |
|
1121 |
++p; |
1122 |
} |
1123 |
} |
1124 |
|
1125 |
decode_ws (dec); |
1126 |
|
1127 |
if (*dec->cur == '}') |
1128 |
{ |
1129 |
++dec->cur; |
1130 |
break; |
1131 |
} |
1132 |
|
1133 |
if (*dec->cur != ',') |
1134 |
ERR (", or } expected while parsing object/hash"); |
1135 |
|
1136 |
++dec->cur; |
1137 |
} |
1138 |
|
1139 |
DEC_DEC_DEPTH; |
1140 |
sv = newRV_noinc ((SV *)hv); |
1141 |
|
1142 |
// check filter callbacks |
1143 |
if (dec->json.flags & F_HOOK) |
1144 |
{ |
1145 |
if (dec->json.cb_sk_object && HvKEYS (hv) == 1) |
1146 |
{ |
1147 |
HE *cb, *he; |
1148 |
|
1149 |
hv_iterinit (hv); |
1150 |
he = hv_iternext (hv); |
1151 |
hv_iterinit (hv); |
1152 |
|
1153 |
// the next line creates a mortal sv each time its called. |
1154 |
// might want to optimise this for common cases. |
1155 |
cb = hv_fetch_ent (dec->json.cb_sk_object, hv_iterkeysv (he), 0, 0); |
1156 |
|
1157 |
if (cb) |
1158 |
{ |
1159 |
dSP; |
1160 |
int count; |
1161 |
|
1162 |
ENTER; SAVETMPS; PUSHMARK (SP); |
1163 |
XPUSHs (HeVAL (he)); |
1164 |
|
1165 |
PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN; |
1166 |
|
1167 |
if (count == 1) |
1168 |
{ |
1169 |
sv = newSVsv (POPs); |
1170 |
FREETMPS; LEAVE; |
1171 |
return sv; |
1172 |
} |
1173 |
|
1174 |
FREETMPS; LEAVE; |
1175 |
} |
1176 |
} |
1177 |
|
1178 |
if (dec->json.cb_object) |
1179 |
{ |
1180 |
dSP; |
1181 |
int count; |
1182 |
|
1183 |
ENTER; SAVETMPS; PUSHMARK (SP); |
1184 |
XPUSHs (sv_2mortal (sv)); |
1185 |
|
1186 |
PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN; |
1187 |
|
1188 |
if (count == 1) |
1189 |
{ |
1190 |
sv = newSVsv (POPs); |
1191 |
FREETMPS; LEAVE; |
1192 |
return sv; |
1193 |
} |
1194 |
|
1195 |
SvREFCNT_inc (sv); |
1196 |
FREETMPS; LEAVE; |
1197 |
} |
1198 |
} |
1199 |
|
1200 |
return sv; |
1201 |
|
1202 |
fail: |
1203 |
SvREFCNT_dec (hv); |
1204 |
DEC_DEC_DEPTH; |
1205 |
return 0; |
1206 |
} |
1207 |
|
1208 |
static SV * |
1209 |
decode_sv (dec_t *dec) |
1210 |
{ |
1211 |
decode_ws (dec); |
1212 |
|
1213 |
// the beauty of JSON: you need exactly one character lookahead |
1214 |
// to parse anything. |
1215 |
switch (*dec->cur) |
1216 |
{ |
1217 |
case '"': ++dec->cur; return decode_str (dec); |
1218 |
case '[': ++dec->cur; return decode_av (dec); |
1219 |
case '{': ++dec->cur; return decode_hv (dec); |
1220 |
|
1221 |
case '-': |
1222 |
case '0': case '1': case '2': case '3': case '4': |
1223 |
case '5': case '6': case '7': case '8': case '9': |
1224 |
return decode_num (dec); |
1225 |
|
1226 |
case 't': |
1227 |
if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4)) |
1228 |
{ |
1229 |
dec->cur += 4; |
1230 |
#if JSON_SLOW |
1231 |
json_true = get_sv ("JSON::XS::true", 1); SvREADONLY_on (json_true); |
1232 |
#endif |
1233 |
return SvREFCNT_inc (json_true); |
1234 |
} |
1235 |
else |
1236 |
ERR ("'true' expected"); |
1237 |
|
1238 |
break; |
1239 |
|
1240 |
case 'f': |
1241 |
if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5)) |
1242 |
{ |
1243 |
dec->cur += 5; |
1244 |
#if JSON_SLOW |
1245 |
json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false); |
1246 |
#endif |
1247 |
return SvREFCNT_inc (json_false); |
1248 |
} |
1249 |
else |
1250 |
ERR ("'false' expected"); |
1251 |
|
1252 |
break; |
1253 |
|
1254 |
case 'n': |
1255 |
if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4)) |
1256 |
{ |
1257 |
dec->cur += 4; |
1258 |
return newSVsv (&PL_sv_undef); |
1259 |
} |
1260 |
else |
1261 |
ERR ("'null' expected"); |
1262 |
|
1263 |
break; |
1264 |
|
1265 |
default: |
1266 |
ERR ("malformed JSON string, neither array, object, number, string or atom"); |
1267 |
break; |
1268 |
} |
1269 |
|
1270 |
fail: |
1271 |
return 0; |
1272 |
} |
1273 |
|
1274 |
static SV * |
1275 |
decode_json (SV *string, JSON *json, UV *offset_return) |
1276 |
{ |
1277 |
dec_t dec; |
1278 |
UV offset; |
1279 |
SV *sv; |
1280 |
|
1281 |
SvGETMAGIC (string); |
1282 |
SvUPGRADE (string, SVt_PV); |
1283 |
|
1284 |
if (json->flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (json->flags)) |
1285 |
croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu", |
1286 |
(unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (json->flags)); |
1287 |
|
1288 |
if (json->flags & F_UTF8) |
1289 |
sv_utf8_downgrade (string, 0); |
1290 |
else |
1291 |
sv_utf8_upgrade (string); |
1292 |
|
1293 |
SvGROW (string, SvCUR (string) + 1); // should basically be a NOP |
1294 |
|
1295 |
dec.json = *json; |
1296 |
dec.cur = SvPVX (string); |
1297 |
dec.end = SvEND (string); |
1298 |
dec.err = 0; |
1299 |
dec.depth = 0; |
1300 |
dec.maxdepth = DEC_DEPTH (dec.json.flags); |
1301 |
|
1302 |
if (dec.json.cb_object || dec.json.cb_sk_object) |
1303 |
dec.json.flags |= F_HOOK; |
1304 |
|
1305 |
*dec.end = 0; // this should basically be a nop, too, but make sure it's there |
1306 |
sv = decode_sv (&dec); |
1307 |
|
1308 |
if (!(offset_return || !sv)) |
1309 |
{ |
1310 |
// check for trailing garbage |
1311 |
decode_ws (&dec); |
1312 |
|
1313 |
if (*dec.cur) |
1314 |
{ |
1315 |
dec.err = "garbage after JSON object"; |
1316 |
SvREFCNT_dec (sv); |
1317 |
sv = 0; |
1318 |
} |
1319 |
} |
1320 |
|
1321 |
if (offset_return || !sv) |
1322 |
{ |
1323 |
offset = dec.json.flags & F_UTF8 |
1324 |
? dec.cur - SvPVX (string) |
1325 |
: utf8_distance (dec.cur, SvPVX (string)); |
1326 |
|
1327 |
if (offset_return) |
1328 |
*offset_return = offset; |
1329 |
} |
1330 |
|
1331 |
if (!sv) |
1332 |
{ |
1333 |
SV *uni = sv_newmortal (); |
1334 |
|
1335 |
// horrible hack to silence warning inside pv_uni_display |
1336 |
COP cop = *PL_curcop; |
1337 |
cop.cop_warnings = pWARN_NONE; |
1338 |
ENTER; |
1339 |
SAVEVPTR (PL_curcop); |
1340 |
PL_curcop = &cop; |
1341 |
pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ); |
1342 |
LEAVE; |
1343 |
|
1344 |
croak ("%s, at character offset %d [\"%s\"]", |
1345 |
dec.err, |
1346 |
(int)offset, |
1347 |
dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)"); |
1348 |
} |
1349 |
|
1350 |
sv = sv_2mortal (sv); |
1351 |
|
1352 |
if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv)) |
1353 |
croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)"); |
1354 |
|
1355 |
return sv; |
1356 |
} |
1357 |
|
1358 |
///////////////////////////////////////////////////////////////////////////// |
1359 |
// XS interface functions |
1360 |
|
1361 |
MODULE = JSON::XS PACKAGE = JSON::XS |
1362 |
|
1363 |
BOOT: |
1364 |
{ |
1365 |
int i; |
1366 |
|
1367 |
for (i = 0; i < 256; ++i) |
1368 |
decode_hexdigit [i] = |
1369 |
i >= '0' && i <= '9' ? i - '0' |
1370 |
: i >= 'a' && i <= 'f' ? i - 'a' + 10 |
1371 |
: i >= 'A' && i <= 'F' ? i - 'A' + 10 |
1372 |
: -1; |
1373 |
|
1374 |
json_stash = gv_stashpv ("JSON::XS" , 1); |
1375 |
json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1); |
1376 |
|
1377 |
json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true ); |
1378 |
json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false); |
1379 |
} |
1380 |
|
1381 |
PROTOTYPES: DISABLE |
1382 |
|
1383 |
void CLONE (...) |
1384 |
CODE: |
1385 |
json_stash = 0; |
1386 |
json_boolean_stash = 0; |
1387 |
|
1388 |
void new (char *klass) |
1389 |
PPCODE: |
1390 |
{ |
1391 |
SV *pv = NEWSV (0, sizeof (JSON)); |
1392 |
SvPOK_only (pv); |
1393 |
Zero (SvPVX (pv), 1, JSON); |
1394 |
((JSON *)SvPVX (pv))->flags = F_DEFAULT; |
1395 |
XPUSHs (sv_2mortal (sv_bless (newRV_noinc (pv), JSON_STASH))); |
1396 |
} |
1397 |
|
1398 |
void ascii (JSON *self, int enable = 1) |
1399 |
ALIAS: |
1400 |
ascii = F_ASCII |
1401 |
latin1 = F_LATIN1 |
1402 |
utf8 = F_UTF8 |
1403 |
indent = F_INDENT |
1404 |
canonical = F_CANONICAL |
1405 |
space_before = F_SPACE_BEFORE |
1406 |
space_after = F_SPACE_AFTER |
1407 |
pretty = F_PRETTY |
1408 |
allow_nonref = F_ALLOW_NONREF |
1409 |
shrink = F_SHRINK |
1410 |
allow_blessed = F_ALLOW_BLESSED |
1411 |
convert_blessed = F_CONV_BLESSED |
1412 |
PPCODE: |
1413 |
{ |
1414 |
if (enable) |
1415 |
self->flags |= ix; |
1416 |
else |
1417 |
self->flags &= ~ix; |
1418 |
|
1419 |
XPUSHs (ST (0)); |
1420 |
} |
1421 |
|
1422 |
void max_depth (JSON *self, UV max_depth = 0x80000000UL) |
1423 |
PPCODE: |
1424 |
{ |
1425 |
UV log2 = 0; |
1426 |
|
1427 |
if (max_depth > 0x80000000UL) max_depth = 0x80000000UL; |
1428 |
|
1429 |
while ((1UL << log2) < max_depth) |
1430 |
++log2; |
1431 |
|
1432 |
self->flags = self->flags & ~F_MAXDEPTH | (log2 << S_MAXDEPTH); |
1433 |
|
1434 |
XPUSHs (ST (0)); |
1435 |
} |
1436 |
|
1437 |
void max_size (JSON *self, UV max_size = 0) |
1438 |
PPCODE: |
1439 |
{ |
1440 |
UV log2 = 0; |
1441 |
|
1442 |
if (max_size > 0x80000000UL) max_size = 0x80000000UL; |
1443 |
if (max_size == 1) max_size = 2; |
1444 |
|
1445 |
while ((1UL << log2) < max_size) |
1446 |
++log2; |
1447 |
|
1448 |
self->flags = self->flags & ~F_MAXSIZE | (log2 << S_MAXSIZE); |
1449 |
|
1450 |
XPUSHs (ST (0)); |
1451 |
} |
1452 |
|
1453 |
void filter_json_object (JSON *self, SV *cb = &PL_sv_undef) |
1454 |
PPCODE: |
1455 |
{ |
1456 |
SvREFCNT_dec (self->cb_object); |
1457 |
self->cb_object = SvOK (cb) ? newSVsv (cb) : 0; |
1458 |
|
1459 |
XPUSHs (ST (0)); |
1460 |
} |
1461 |
|
1462 |
void filter_json_single_key_object (JSON *self, SV *key, SV *cb = &PL_sv_undef) |
1463 |
PPCODE: |
1464 |
{ |
1465 |
if (!self->cb_sk_object) |
1466 |
self->cb_sk_object = newHV (); |
1467 |
|
1468 |
if (SvOK (cb)) |
1469 |
hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0); |
1470 |
else |
1471 |
{ |
1472 |
hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0); |
1473 |
|
1474 |
if (!HvKEYS (self->cb_sk_object)) |
1475 |
{ |
1476 |
SvREFCNT_dec (self->cb_sk_object); |
1477 |
self->cb_sk_object = 0; |
1478 |
} |
1479 |
} |
1480 |
|
1481 |
XPUSHs (ST (0)); |
1482 |
} |
1483 |
|
1484 |
void encode (JSON *self, SV *scalar) |
1485 |
PPCODE: |
1486 |
XPUSHs (encode_json (scalar, self)); |
1487 |
|
1488 |
void decode (JSON *self, SV *jsonstr) |
1489 |
PPCODE: |
1490 |
XPUSHs (decode_json (jsonstr, self, 0)); |
1491 |
|
1492 |
void decode_prefix (JSON *self, SV *jsonstr) |
1493 |
PPCODE: |
1494 |
{ |
1495 |
UV offset; |
1496 |
EXTEND (SP, 2); |
1497 |
PUSHs (decode_json (jsonstr, self, &offset)); |
1498 |
PUSHs (sv_2mortal (newSVuv (offset))); |
1499 |
} |
1500 |
|
1501 |
void DESTROY (JSON *self) |
1502 |
CODE: |
1503 |
SvREFCNT_dec (self->cb_sk_object); |
1504 |
SvREFCNT_dec (self->cb_object); |
1505 |
|
1506 |
PROTOTYPES: ENABLE |
1507 |
|
1508 |
void to_json (SV *scalar) |
1509 |
PPCODE: |
1510 |
{ |
1511 |
JSON json = { F_DEFAULT | F_UTF8 }; |
1512 |
XPUSHs (encode_json (scalar, &json)); |
1513 |
} |
1514 |
|
1515 |
void from_json (SV *jsonstr) |
1516 |
PPCODE: |
1517 |
{ |
1518 |
JSON json = { F_DEFAULT | F_UTF8 }; |
1519 |
XPUSHs (decode_json (jsonstr, &json, 0)); |
1520 |
} |
1521 |
|