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 |
|
9 |
#define F_ASCII 0x00000001 |
10 |
#define F_UTF8 0x00000002 |
11 |
#define F_INDENT 0x00000004 |
12 |
#define F_CANONICAL 0x00000008 |
13 |
#define F_SPACE_BEFORE 0x00000010 |
14 |
#define F_SPACE_AFTER 0x00000020 |
15 |
#define F_ALLOW_NONREF 0x00000080 |
16 |
#define F_SHRINK 0x00000100 |
17 |
|
18 |
#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER |
19 |
#define F_DEFAULT 0 |
20 |
|
21 |
#define INIT_SIZE 32 // initial scalar size to be allocated |
22 |
|
23 |
#define SB do { |
24 |
#define SE } while (0) |
25 |
|
26 |
static HV *json_stash; |
27 |
|
28 |
// structure used for encoding JSON |
29 |
typedef struct |
30 |
{ |
31 |
char *cur; |
32 |
STRLEN len; // SvLEN (sv) |
33 |
char *end; // SvEND (sv) |
34 |
SV *sv; |
35 |
UV flags; |
36 |
int max_recurse; |
37 |
int indent; |
38 |
} enc_t; |
39 |
|
40 |
// structure used for decoding JSON |
41 |
typedef struct |
42 |
{ |
43 |
char *cur; |
44 |
char *end; |
45 |
const char *err; |
46 |
UV flags; |
47 |
} dec_t; |
48 |
|
49 |
static UV * |
50 |
SvJSON (SV *sv) |
51 |
{ |
52 |
if (!(SvROK (sv) && SvOBJECT (SvRV (sv)) && SvSTASH (SvRV (sv)) == json_stash)) |
53 |
croak ("object is not of type JSON::XS"); |
54 |
|
55 |
return &SvUVX (SvRV (sv)); |
56 |
} |
57 |
|
58 |
static void |
59 |
shrink (SV *sv) |
60 |
{ |
61 |
sv_utf8_downgrade (sv, 1); |
62 |
#ifdef SvPV_shrink_to_cur |
63 |
SvPV_shrink_to_cur (sv); |
64 |
#endif |
65 |
} |
66 |
|
67 |
///////////////////////////////////////////////////////////////////////////// |
68 |
|
69 |
static void |
70 |
need (enc_t *enc, STRLEN len) |
71 |
{ |
72 |
if (enc->cur + len >= enc->end) |
73 |
{ |
74 |
STRLEN cur = enc->cur - SvPVX (enc->sv); |
75 |
SvGROW (enc->sv, cur + len + 1); |
76 |
enc->cur = SvPVX (enc->sv) + cur; |
77 |
enc->end = SvPVX (enc->sv) + SvLEN (enc->sv); |
78 |
} |
79 |
} |
80 |
|
81 |
static void |
82 |
encode_ch (enc_t *enc, char ch) |
83 |
{ |
84 |
need (enc, 1); |
85 |
*enc->cur++ = ch; |
86 |
} |
87 |
|
88 |
static void |
89 |
encode_str (enc_t *enc, char *str, STRLEN len, int is_utf8) |
90 |
{ |
91 |
char *end = str + len; |
92 |
|
93 |
need (enc, len); |
94 |
|
95 |
while (str < end) |
96 |
{ |
97 |
unsigned char ch = *(unsigned char *)str; |
98 |
|
99 |
if (ch >= 0x20 && ch < 0x80) // most common case |
100 |
{ |
101 |
if (ch == '"') // but with slow exceptions |
102 |
{ |
103 |
need (enc, len += 1); |
104 |
*enc->cur++ = '\\'; |
105 |
*enc->cur++ = '"'; |
106 |
} |
107 |
else if (ch == '\\') |
108 |
{ |
109 |
need (enc, len += 1); |
110 |
*enc->cur++ = '\\'; |
111 |
*enc->cur++ = '\\'; |
112 |
} |
113 |
else |
114 |
*enc->cur++ = ch; |
115 |
|
116 |
++str; |
117 |
} |
118 |
else |
119 |
{ |
120 |
switch (ch) |
121 |
{ |
122 |
case '\010': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'b'; ++str; break; |
123 |
case '\011': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 't'; ++str; break; |
124 |
case '\012': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'n'; ++str; break; |
125 |
case '\014': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'f'; ++str; break; |
126 |
case '\015': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'r'; ++str; break; |
127 |
|
128 |
default: |
129 |
{ |
130 |
STRLEN clen; |
131 |
UV uch; |
132 |
|
133 |
if (is_utf8) |
134 |
{ |
135 |
uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY); |
136 |
if (clen == (STRLEN)-1) |
137 |
croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str); |
138 |
} |
139 |
else |
140 |
{ |
141 |
uch = ch; |
142 |
clen = 1; |
143 |
} |
144 |
|
145 |
if (uch > 0x10FFFFUL) |
146 |
croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch); |
147 |
|
148 |
if (uch < 0x80 || enc->flags & F_ASCII) |
149 |
{ |
150 |
if (uch > 0xFFFFUL) |
151 |
{ |
152 |
need (enc, len += 11); |
153 |
sprintf (enc->cur, "\\u%04x\\u%04x", |
154 |
(int)((uch - 0x10000) / 0x400 + 0xD800), |
155 |
(int)((uch - 0x10000) % 0x400 + 0xDC00)); |
156 |
enc->cur += 12; |
157 |
} |
158 |
else |
159 |
{ |
160 |
static char hexdigit [16] = "0123456789abcdef"; |
161 |
need (enc, len += 5); |
162 |
*enc->cur++ = '\\'; |
163 |
*enc->cur++ = 'u'; |
164 |
*enc->cur++ = hexdigit [ uch >> 12 ]; |
165 |
*enc->cur++ = hexdigit [(uch >> 8) & 15]; |
166 |
*enc->cur++ = hexdigit [(uch >> 4) & 15]; |
167 |
*enc->cur++ = hexdigit [(uch >> 0) & 15]; |
168 |
} |
169 |
|
170 |
str += clen; |
171 |
} |
172 |
else if (is_utf8) |
173 |
{ |
174 |
need (enc, len += clen); |
175 |
do |
176 |
{ |
177 |
*enc->cur++ = *str++; |
178 |
} |
179 |
while (--clen); |
180 |
} |
181 |
else |
182 |
{ |
183 |
need (enc, len += 10); // never more than 11 bytes needed |
184 |
enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0); |
185 |
++str; |
186 |
} |
187 |
} |
188 |
} |
189 |
} |
190 |
|
191 |
--len; |
192 |
} |
193 |
} |
194 |
|
195 |
#define INDENT SB \ |
196 |
if (enc->flags & F_INDENT) \ |
197 |
{ \ |
198 |
int i_; \ |
199 |
need (enc, enc->indent); \ |
200 |
for (i_ = enc->indent * 3; i_--; )\ |
201 |
encode_ch (enc, ' '); \ |
202 |
} \ |
203 |
SE |
204 |
|
205 |
#define SPACE SB need (enc, 1); encode_ch (enc, ' '); SE |
206 |
#define NL SB if (enc->flags & F_INDENT) { need (enc, 1); encode_ch (enc, '\n'); } SE |
207 |
#define COMMA SB \ |
208 |
encode_ch (enc, ','); \ |
209 |
if (enc->flags & F_INDENT) \ |
210 |
NL; \ |
211 |
else if (enc->flags & F_SPACE_AFTER) \ |
212 |
SPACE; \ |
213 |
SE |
214 |
|
215 |
static void encode_sv (enc_t *enc, SV *sv); |
216 |
|
217 |
static void |
218 |
encode_av (enc_t *enc, AV *av) |
219 |
{ |
220 |
int i, len = av_len (av); |
221 |
|
222 |
encode_ch (enc, '['); NL; |
223 |
++enc->indent; |
224 |
|
225 |
for (i = 0; i <= len; ++i) |
226 |
{ |
227 |
INDENT; |
228 |
encode_sv (enc, *av_fetch (av, i, 0)); |
229 |
|
230 |
if (i < len) |
231 |
COMMA; |
232 |
} |
233 |
|
234 |
NL; |
235 |
|
236 |
--enc->indent; |
237 |
INDENT; encode_ch (enc, ']'); |
238 |
} |
239 |
|
240 |
static void |
241 |
encode_he (enc_t *enc, HE *he) |
242 |
{ |
243 |
encode_ch (enc, '"'); |
244 |
|
245 |
if (HeKLEN (he) == HEf_SVKEY) |
246 |
{ |
247 |
SV *sv = HeSVKEY (he); |
248 |
STRLEN len; |
249 |
char *str; |
250 |
|
251 |
SvGETMAGIC (sv); |
252 |
str = SvPV (sv, len); |
253 |
|
254 |
encode_str (enc, str, len, SvUTF8 (sv)); |
255 |
} |
256 |
else |
257 |
encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he)); |
258 |
|
259 |
encode_ch (enc, '"'); |
260 |
|
261 |
if (enc->flags & F_SPACE_BEFORE) SPACE; |
262 |
encode_ch (enc, ':'); |
263 |
if (enc->flags & F_SPACE_AFTER ) SPACE; |
264 |
encode_sv (enc, HeVAL (he)); |
265 |
} |
266 |
|
267 |
// compare hash entries, used when all keys are bytestrings |
268 |
static int |
269 |
he_cmp_fast (const void *a_, const void *b_) |
270 |
{ |
271 |
int cmp; |
272 |
|
273 |
HE *a = *(HE **)a_; |
274 |
HE *b = *(HE **)b_; |
275 |
|
276 |
STRLEN la = HeKLEN (a); |
277 |
STRLEN lb = HeKLEN (b); |
278 |
|
279 |
if (!(cmp = memcmp (HeKEY (a), HeKEY (b), la < lb ? la : lb))) |
280 |
cmp = la - lb; |
281 |
|
282 |
return cmp; |
283 |
} |
284 |
|
285 |
// compare hash entries, used when some keys are sv's or utf-x |
286 |
static int |
287 |
he_cmp_slow (const void *a, const void *b) |
288 |
{ |
289 |
return sv_cmp (HeSVKEY_force (*(HE **)a), HeSVKEY_force (*(HE **)b)); |
290 |
} |
291 |
|
292 |
static void |
293 |
encode_hv (enc_t *enc, HV *hv) |
294 |
{ |
295 |
int count, i; |
296 |
|
297 |
encode_ch (enc, '{'); NL; ++enc->indent; |
298 |
|
299 |
if ((count = hv_iterinit (hv))) |
300 |
{ |
301 |
// for canonical output we have to sort by keys first |
302 |
// actually, this is mostly due to the stupid so-called |
303 |
// security workaround added somewhere in 5.8.x. |
304 |
// that randomises hash orderings |
305 |
if (enc->flags & F_CANONICAL) |
306 |
{ |
307 |
HE *he, *hes [count]; |
308 |
int fast = 1; |
309 |
|
310 |
i = 0; |
311 |
while ((he = hv_iternext (hv))) |
312 |
{ |
313 |
hes [i++] = he; |
314 |
if (HeKLEN (he) < 0 || HeKUTF8 (he)) |
315 |
fast = 0; |
316 |
} |
317 |
|
318 |
assert (i == count); |
319 |
|
320 |
if (fast) |
321 |
qsort (hes, count, sizeof (HE *), he_cmp_fast); |
322 |
else |
323 |
{ |
324 |
// hack to forcefully disable "use bytes" |
325 |
COP cop = *PL_curcop; |
326 |
cop.op_private = 0; |
327 |
|
328 |
ENTER; |
329 |
SAVETMPS; |
330 |
|
331 |
SAVEVPTR (PL_curcop); |
332 |
PL_curcop = &cop; |
333 |
|
334 |
qsort (hes, count, sizeof (HE *), he_cmp_slow); |
335 |
|
336 |
FREETMPS; |
337 |
LEAVE; |
338 |
} |
339 |
|
340 |
for (i = 0; i < count; ++i) |
341 |
{ |
342 |
INDENT; |
343 |
encode_he (enc, hes [i]); |
344 |
|
345 |
if (i < count - 1) |
346 |
COMMA; |
347 |
} |
348 |
|
349 |
NL; |
350 |
} |
351 |
else |
352 |
{ |
353 |
SV *sv; |
354 |
HE *he = hv_iternext (hv); |
355 |
|
356 |
for (;;) |
357 |
{ |
358 |
INDENT; |
359 |
encode_he (enc, he); |
360 |
|
361 |
if (!(he = hv_iternext (hv))) |
362 |
break; |
363 |
|
364 |
COMMA; |
365 |
} |
366 |
|
367 |
NL; |
368 |
} |
369 |
} |
370 |
|
371 |
--enc->indent; INDENT; encode_ch (enc, '}'); |
372 |
} |
373 |
|
374 |
static void |
375 |
encode_sv (enc_t *enc, SV *sv) |
376 |
{ |
377 |
SvGETMAGIC (sv); |
378 |
|
379 |
if (SvPOKp (sv)) |
380 |
{ |
381 |
STRLEN len; |
382 |
char *str = SvPV (sv, len); |
383 |
encode_ch (enc, '"'); |
384 |
encode_str (enc, str, len, SvUTF8 (sv)); |
385 |
encode_ch (enc, '"'); |
386 |
} |
387 |
else if (SvNOKp (sv)) |
388 |
{ |
389 |
need (enc, NV_DIG + 32); |
390 |
Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur); |
391 |
enc->cur += strlen (enc->cur); |
392 |
} |
393 |
else if (SvIOKp (sv)) |
394 |
{ |
395 |
need (enc, 64); |
396 |
enc->cur += |
397 |
SvIsUV(sv) |
398 |
? snprintf (enc->cur, 64, "%"UVuf, (UV)SvUVX (sv)) |
399 |
: snprintf (enc->cur, 64, "%"IVdf, (IV)SvIVX (sv)); |
400 |
} |
401 |
else if (SvROK (sv)) |
402 |
{ |
403 |
SV *rv = SvRV (sv); |
404 |
|
405 |
if (!--enc->max_recurse) |
406 |
croak ("data structure too deep (hit recursion limit)"); |
407 |
|
408 |
switch (SvTYPE (rv)) |
409 |
{ |
410 |
case SVt_PVAV: encode_av (enc, (AV *)rv); break; |
411 |
case SVt_PVHV: encode_hv (enc, (HV *)rv); break; |
412 |
|
413 |
default: |
414 |
croak ("encountered %s, but JSON can only represent references to arrays or hashes", |
415 |
SvPV_nolen (sv)); |
416 |
} |
417 |
} |
418 |
else if (!SvOK (sv)) |
419 |
encode_str (enc, "null", 4, 0); |
420 |
else |
421 |
croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this", |
422 |
SvPV_nolen (sv), SvFLAGS (sv)); |
423 |
} |
424 |
|
425 |
static SV * |
426 |
encode_json (SV *scalar, UV flags) |
427 |
{ |
428 |
if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar)) |
429 |
croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)"); |
430 |
|
431 |
enc_t enc; |
432 |
enc.flags = flags; |
433 |
enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); |
434 |
enc.cur = SvPVX (enc.sv); |
435 |
enc.end = SvEND (enc.sv); |
436 |
enc.max_recurse = 0; |
437 |
enc.indent = 0; |
438 |
|
439 |
SvPOK_only (enc.sv); |
440 |
encode_sv (&enc, scalar); |
441 |
|
442 |
if (!(flags & (F_ASCII | F_UTF8))) |
443 |
SvUTF8_on (enc.sv); |
444 |
|
445 |
SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); |
446 |
|
447 |
if (enc.flags & F_SHRINK) |
448 |
shrink (enc.sv); |
449 |
|
450 |
return enc.sv; |
451 |
} |
452 |
|
453 |
///////////////////////////////////////////////////////////////////////////// |
454 |
|
455 |
#define WS \ |
456 |
for (;;) \ |
457 |
{ \ |
458 |
char ch = *dec->cur; \ |
459 |
if (ch > 0x20 \ |
460 |
|| (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)) \ |
461 |
break; \ |
462 |
++dec->cur; \ |
463 |
} |
464 |
|
465 |
#define ERR(reason) SB dec->err = reason; goto fail; SE |
466 |
#define EXPECT_CH(ch) SB \ |
467 |
if (*dec->cur != ch) \ |
468 |
ERR (# ch " expected"); \ |
469 |
++dec->cur; \ |
470 |
SE |
471 |
|
472 |
static SV *decode_sv (dec_t *dec); |
473 |
|
474 |
static signed char decode_hexdigit[256]; |
475 |
|
476 |
static UV |
477 |
decode_4hex (dec_t *dec) |
478 |
{ |
479 |
signed char d1, d2, d3, d4; |
480 |
|
481 |
d1 = decode_hexdigit [((unsigned char *)dec->cur) [0]]; |
482 |
if (d1 < 0) ERR ("four hexadecimal digits expected"); |
483 |
d2 = decode_hexdigit [((unsigned char *)dec->cur) [1]]; |
484 |
if (d2 < 0) ERR ("four hexadecimal digits expected"); |
485 |
d3 = decode_hexdigit [((unsigned char *)dec->cur) [2]]; |
486 |
if (d3 < 0) ERR ("four hexadecimal digits expected"); |
487 |
d4 = decode_hexdigit [((unsigned char *)dec->cur) [3]]; |
488 |
if (d4 < 0) ERR ("four hexadecimal digits expected"); |
489 |
|
490 |
dec->cur += 4; |
491 |
|
492 |
return ((UV)d1) << 12 |
493 |
| ((UV)d2) << 8 |
494 |
| ((UV)d3) << 4 |
495 |
| ((UV)d4); |
496 |
|
497 |
fail: |
498 |
return (UV)-1; |
499 |
} |
500 |
|
501 |
#define APPEND_GROW(n) SB \ |
502 |
if (cur + (n) >= end) \ |
503 |
{ \ |
504 |
STRLEN ofs = cur - SvPVX (sv); \ |
505 |
SvGROW (sv, ofs + (n) + 1); \ |
506 |
cur = SvPVX (sv) + ofs; \ |
507 |
end = SvEND (sv); \ |
508 |
} \ |
509 |
SE |
510 |
|
511 |
#define APPEND_CH(ch) SB \ |
512 |
APPEND_GROW (1); \ |
513 |
*cur++ = (ch); \ |
514 |
SE |
515 |
|
516 |
static SV * |
517 |
decode_str (dec_t *dec) |
518 |
{ |
519 |
SV *sv = NEWSV (0,2); |
520 |
int utf8 = 0; |
521 |
char *cur = SvPVX (sv); |
522 |
char *end = SvEND (sv); |
523 |
|
524 |
for (;;) |
525 |
{ |
526 |
unsigned char ch = *(unsigned char *)dec->cur; |
527 |
|
528 |
if (ch == '"') |
529 |
break; |
530 |
else if (ch == '\\') |
531 |
{ |
532 |
switch (*++dec->cur) |
533 |
{ |
534 |
case '\\': |
535 |
case '/': |
536 |
case '"': APPEND_CH (*dec->cur++); break; |
537 |
|
538 |
case 'b': APPEND_CH ('\010'); ++dec->cur; break; |
539 |
case 't': APPEND_CH ('\011'); ++dec->cur; break; |
540 |
case 'n': APPEND_CH ('\012'); ++dec->cur; break; |
541 |
case 'f': APPEND_CH ('\014'); ++dec->cur; break; |
542 |
case 'r': APPEND_CH ('\015'); ++dec->cur; break; |
543 |
|
544 |
case 'u': |
545 |
{ |
546 |
UV lo, hi; |
547 |
++dec->cur; |
548 |
|
549 |
hi = decode_4hex (dec); |
550 |
if (hi == (UV)-1) |
551 |
goto fail; |
552 |
|
553 |
// possibly a surrogate pair |
554 |
if (hi >= 0xd800 && hi < 0xdc00) |
555 |
{ |
556 |
if (dec->cur [0] != '\\' || dec->cur [1] != 'u') |
557 |
ERR ("missing low surrogate character in surrogate pair"); |
558 |
|
559 |
dec->cur += 2; |
560 |
|
561 |
lo = decode_4hex (dec); |
562 |
if (lo == (UV)-1) |
563 |
goto fail; |
564 |
|
565 |
if (lo < 0xdc00 || lo >= 0xe000) |
566 |
ERR ("surrogate pair expected"); |
567 |
|
568 |
hi = (hi - 0xD800) * 0x400 + (lo - 0xDC00) + 0x10000; |
569 |
} |
570 |
else if (hi >= 0xdc00 && hi < 0xe000) |
571 |
ERR ("missing high surrogate character in surrogate pair"); |
572 |
|
573 |
if (hi >= 0x80) |
574 |
{ |
575 |
utf8 = 1; |
576 |
|
577 |
APPEND_GROW (4); // at most 4 bytes for 21 bits |
578 |
cur = (char *)uvuni_to_utf8_flags (cur, hi, 0); |
579 |
} |
580 |
else |
581 |
APPEND_CH (hi); |
582 |
} |
583 |
break; |
584 |
|
585 |
default: |
586 |
--dec->cur; |
587 |
ERR ("illegal backslash escape sequence in string"); |
588 |
} |
589 |
} |
590 |
else if (ch >= 0x20 && ch <= 0x7f) |
591 |
APPEND_CH (*dec->cur++); |
592 |
else if (ch >= 0x80) |
593 |
{ |
594 |
STRLEN clen; |
595 |
UV uch = utf8n_to_uvuni (dec->cur, dec->end - dec->cur, &clen, UTF8_CHECK_ONLY); |
596 |
if (clen == (STRLEN)-1) |
597 |
ERR ("malformed UTF-8 character in JSON string"); |
598 |
|
599 |
APPEND_GROW (clen); |
600 |
do |
601 |
{ |
602 |
*cur++ = *dec->cur++; |
603 |
} |
604 |
while (--clen); |
605 |
|
606 |
utf8 = 1; |
607 |
} |
608 |
else if (dec->cur == dec->end) |
609 |
ERR ("unexpected end of string while parsing json string"); |
610 |
else |
611 |
ERR ("invalid character encountered"); |
612 |
} |
613 |
|
614 |
++dec->cur; |
615 |
|
616 |
SvCUR_set (sv, cur - SvPVX (sv)); |
617 |
|
618 |
SvPOK_only (sv); |
619 |
*SvEND (sv) = 0; |
620 |
|
621 |
if (utf8) |
622 |
SvUTF8_on (sv); |
623 |
|
624 |
if (dec->flags & F_SHRINK) |
625 |
shrink (sv); |
626 |
|
627 |
return sv; |
628 |
|
629 |
fail: |
630 |
SvREFCNT_dec (sv); |
631 |
return 0; |
632 |
} |
633 |
|
634 |
static SV * |
635 |
decode_num (dec_t *dec) |
636 |
{ |
637 |
int is_nv = 0; |
638 |
char *start = dec->cur; |
639 |
|
640 |
// [minus] |
641 |
if (*dec->cur == '-') |
642 |
++dec->cur; |
643 |
|
644 |
if (*dec->cur == '0') |
645 |
{ |
646 |
++dec->cur; |
647 |
if (*dec->cur >= '0' && *dec->cur <= '9') |
648 |
ERR ("malformed number (leading zero must not be followed by another digit)"); |
649 |
} |
650 |
else if (*dec->cur < '0' || *dec->cur > '9') |
651 |
ERR ("malformed number (no digits after initial minus)"); |
652 |
else |
653 |
do |
654 |
{ |
655 |
++dec->cur; |
656 |
} |
657 |
while (*dec->cur >= '0' && *dec->cur <= '9'); |
658 |
|
659 |
// [frac] |
660 |
if (*dec->cur == '.') |
661 |
{ |
662 |
++dec->cur; |
663 |
|
664 |
if (*dec->cur < '0' || *dec->cur > '9') |
665 |
ERR ("malformed number (no digits after decimal point)"); |
666 |
|
667 |
do |
668 |
{ |
669 |
++dec->cur; |
670 |
} |
671 |
while (*dec->cur >= '0' && *dec->cur <= '9'); |
672 |
|
673 |
is_nv = 1; |
674 |
} |
675 |
|
676 |
// [exp] |
677 |
if (*dec->cur == 'e' || *dec->cur == 'E') |
678 |
{ |
679 |
++dec->cur; |
680 |
|
681 |
if (*dec->cur == '-' || *dec->cur == '+') |
682 |
++dec->cur; |
683 |
|
684 |
if (*dec->cur < '0' || *dec->cur > '9') |
685 |
ERR ("malformed number (no digits after exp sign)"); |
686 |
|
687 |
do |
688 |
{ |
689 |
++dec->cur; |
690 |
} |
691 |
while (*dec->cur >= '0' && *dec->cur <= '9'); |
692 |
|
693 |
is_nv = 1; |
694 |
} |
695 |
|
696 |
if (!is_nv) |
697 |
{ |
698 |
UV uv; |
699 |
int numtype = grok_number (start, dec->cur - start, &uv); |
700 |
if (numtype & IS_NUMBER_IN_UV) |
701 |
if (numtype & IS_NUMBER_NEG) |
702 |
{ |
703 |
if (uv < (UV)IV_MIN) |
704 |
return newSViv (-(IV)uv); |
705 |
} |
706 |
else |
707 |
return newSVuv (uv); |
708 |
} |
709 |
|
710 |
return newSVnv (Atof (start)); |
711 |
|
712 |
fail: |
713 |
return 0; |
714 |
} |
715 |
|
716 |
static SV * |
717 |
decode_av (dec_t *dec) |
718 |
{ |
719 |
AV *av = newAV (); |
720 |
|
721 |
WS; |
722 |
if (*dec->cur == ']') |
723 |
++dec->cur; |
724 |
else |
725 |
for (;;) |
726 |
{ |
727 |
SV *value; |
728 |
|
729 |
value = decode_sv (dec); |
730 |
if (!value) |
731 |
goto fail; |
732 |
|
733 |
av_push (av, value); |
734 |
|
735 |
WS; |
736 |
|
737 |
if (*dec->cur == ']') |
738 |
{ |
739 |
++dec->cur; |
740 |
break; |
741 |
} |
742 |
|
743 |
if (*dec->cur != ',') |
744 |
ERR (", or ] expected while parsing array"); |
745 |
|
746 |
++dec->cur; |
747 |
} |
748 |
|
749 |
return newRV_noinc ((SV *)av); |
750 |
|
751 |
fail: |
752 |
SvREFCNT_dec (av); |
753 |
return 0; |
754 |
} |
755 |
|
756 |
static SV * |
757 |
decode_hv (dec_t *dec) |
758 |
{ |
759 |
HV *hv = newHV (); |
760 |
|
761 |
WS; |
762 |
if (*dec->cur == '}') |
763 |
++dec->cur; |
764 |
else |
765 |
for (;;) |
766 |
{ |
767 |
SV *key, *value; |
768 |
|
769 |
WS; EXPECT_CH ('"'); |
770 |
|
771 |
key = decode_str (dec); |
772 |
if (!key) |
773 |
goto fail; |
774 |
|
775 |
WS; EXPECT_CH (':'); |
776 |
|
777 |
value = decode_sv (dec); |
778 |
if (!value) |
779 |
{ |
780 |
SvREFCNT_dec (key); |
781 |
goto fail; |
782 |
} |
783 |
|
784 |
//TODO: optimise |
785 |
hv_store_ent (hv, key, value, 0); |
786 |
|
787 |
WS; |
788 |
|
789 |
if (*dec->cur == '}') |
790 |
{ |
791 |
++dec->cur; |
792 |
break; |
793 |
} |
794 |
|
795 |
if (*dec->cur != ',') |
796 |
ERR (", or } expected while parsing object/hash"); |
797 |
|
798 |
++dec->cur; |
799 |
} |
800 |
|
801 |
return newRV_noinc ((SV *)hv); |
802 |
|
803 |
fail: |
804 |
SvREFCNT_dec (hv); |
805 |
return 0; |
806 |
} |
807 |
|
808 |
static SV * |
809 |
decode_sv (dec_t *dec) |
810 |
{ |
811 |
WS; |
812 |
switch (*dec->cur) |
813 |
{ |
814 |
case '"': ++dec->cur; return decode_str (dec); |
815 |
case '[': ++dec->cur; return decode_av (dec); |
816 |
case '{': ++dec->cur; return decode_hv (dec); |
817 |
|
818 |
case '-': |
819 |
case '0': case '1': case '2': case '3': case '4': |
820 |
case '5': case '6': case '7': case '8': case '9': |
821 |
return decode_num (dec); |
822 |
|
823 |
case 't': |
824 |
if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4)) |
825 |
{ |
826 |
dec->cur += 4; |
827 |
return newSViv (1); |
828 |
} |
829 |
else |
830 |
ERR ("'true' expected"); |
831 |
|
832 |
break; |
833 |
|
834 |
case 'f': |
835 |
if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5)) |
836 |
{ |
837 |
dec->cur += 5; |
838 |
return newSViv (0); |
839 |
} |
840 |
else |
841 |
ERR ("'false' expected"); |
842 |
|
843 |
break; |
844 |
|
845 |
case 'n': |
846 |
if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4)) |
847 |
{ |
848 |
dec->cur += 4; |
849 |
return newSVsv (&PL_sv_undef); |
850 |
} |
851 |
else |
852 |
ERR ("'null' expected"); |
853 |
|
854 |
break; |
855 |
|
856 |
default: |
857 |
ERR ("malformed json string, neither array, object, number, string or atom"); |
858 |
break; |
859 |
} |
860 |
|
861 |
fail: |
862 |
return 0; |
863 |
} |
864 |
|
865 |
static SV * |
866 |
decode_json (SV *string, UV flags) |
867 |
{ |
868 |
SV *sv; |
869 |
|
870 |
if (flags & F_UTF8) |
871 |
sv_utf8_downgrade (string, 0); |
872 |
else |
873 |
sv_utf8_upgrade (string); |
874 |
|
875 |
SvGROW (string, SvCUR (string) + 1); // should basically be a NOP |
876 |
|
877 |
dec_t dec; |
878 |
dec.flags = flags; |
879 |
dec.cur = SvPVX (string); |
880 |
dec.end = SvEND (string); |
881 |
dec.err = 0; |
882 |
|
883 |
sv = decode_sv (&dec); |
884 |
|
885 |
if (!sv) |
886 |
{ |
887 |
IV offset = dec.flags & F_UTF8 |
888 |
? dec.cur - SvPVX (string) |
889 |
: utf8_distance (dec.cur, SvPVX (string)); |
890 |
SV *uni = sv_newmortal (); |
891 |
|
892 |
// horrible hack to silence warning inside pv_uni_display |
893 |
COP cop = *PL_curcop; |
894 |
cop.cop_warnings = pWARN_NONE; |
895 |
ENTER; |
896 |
SAVEVPTR (PL_curcop); |
897 |
PL_curcop = &cop; |
898 |
pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ); |
899 |
LEAVE; |
900 |
|
901 |
croak ("%s, at character offset %d (%s)", |
902 |
dec.err, |
903 |
(int)offset, |
904 |
dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)"); |
905 |
} |
906 |
|
907 |
sv = sv_2mortal (sv); |
908 |
|
909 |
if (!(dec.flags & F_ALLOW_NONREF) && !SvROK (sv)) |
910 |
croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)"); |
911 |
|
912 |
return sv; |
913 |
} |
914 |
|
915 |
MODULE = JSON::XS PACKAGE = JSON::XS |
916 |
|
917 |
BOOT: |
918 |
{ |
919 |
int i; |
920 |
|
921 |
memset (decode_hexdigit, 0xff, 256); |
922 |
for (i = 10; i--; ) |
923 |
decode_hexdigit ['0' + i] = i; |
924 |
|
925 |
for (i = 7; i--; ) |
926 |
{ |
927 |
decode_hexdigit ['a' + i] = 10 + i; |
928 |
decode_hexdigit ['A' + i] = 10 + i; |
929 |
} |
930 |
|
931 |
json_stash = gv_stashpv ("JSON::XS", 1); |
932 |
} |
933 |
|
934 |
PROTOTYPES: DISABLE |
935 |
|
936 |
SV *new (char *dummy) |
937 |
CODE: |
938 |
RETVAL = sv_bless (newRV_noinc (newSVuv (F_DEFAULT)), json_stash); |
939 |
OUTPUT: |
940 |
RETVAL |
941 |
|
942 |
SV *ascii (SV *self, int enable = 1) |
943 |
ALIAS: |
944 |
ascii = F_ASCII |
945 |
utf8 = F_UTF8 |
946 |
indent = F_INDENT |
947 |
canonical = F_CANONICAL |
948 |
space_before = F_SPACE_BEFORE |
949 |
space_after = F_SPACE_AFTER |
950 |
pretty = F_PRETTY |
951 |
allow_nonref = F_ALLOW_NONREF |
952 |
shrink = F_SHRINK |
953 |
CODE: |
954 |
{ |
955 |
UV *uv = SvJSON (self); |
956 |
if (enable) |
957 |
*uv |= ix; |
958 |
else |
959 |
*uv &= ~ix; |
960 |
|
961 |
RETVAL = newSVsv (self); |
962 |
} |
963 |
OUTPUT: |
964 |
RETVAL |
965 |
|
966 |
void encode (SV *self, SV *scalar) |
967 |
PPCODE: |
968 |
XPUSHs (encode_json (scalar, *SvJSON (self))); |
969 |
|
970 |
void decode (SV *self, SV *jsonstr) |
971 |
PPCODE: |
972 |
XPUSHs (decode_json (jsonstr, *SvJSON (self))); |
973 |
|
974 |
PROTOTYPES: ENABLE |
975 |
|
976 |
void to_json (SV *scalar) |
977 |
PPCODE: |
978 |
XPUSHs (encode_json (scalar, F_UTF8)); |
979 |
|
980 |
void from_json (SV *jsonstr) |
981 |
PPCODE: |
982 |
XPUSHs (decode_json (jsonstr, F_UTF8)); |
983 |
|