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 <limits.h> |
10 |
#include <float.h> |
11 |
|
12 |
#include "ecb.h" |
13 |
|
14 |
// compatibility with perl <5.18 |
15 |
#ifndef HvNAMELEN_get |
16 |
# define HvNAMELEN_get(hv) strlen (HvNAME (hv)) |
17 |
#endif |
18 |
#ifndef HvNAMELEN |
19 |
# define HvNAMELEN(hv) HvNAMELEN_get (hv) |
20 |
#endif |
21 |
#ifndef HvNAMEUTF8 |
22 |
# define HvNAMEUTF8(hv) 0 |
23 |
#endif |
24 |
#ifndef SvREFCNT_dec_NN |
25 |
# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv) |
26 |
#endif |
27 |
|
28 |
// known major and minor types |
29 |
enum cbor_type |
30 |
{ |
31 |
MAJOR_SHIFT = 5, |
32 |
MINOR_MASK = 0x1f, |
33 |
|
34 |
MAJOR_POS_INT = 0 << MAJOR_SHIFT, |
35 |
MAJOR_NEG_INT = 1 << MAJOR_SHIFT, |
36 |
MAJOR_BYTES = 2 << MAJOR_SHIFT, |
37 |
MAJOR_TEXT = 3 << MAJOR_SHIFT, |
38 |
MAJOR_ARRAY = 4 << MAJOR_SHIFT, |
39 |
MAJOR_MAP = 5 << MAJOR_SHIFT, |
40 |
MAJOR_TAG = 6 << MAJOR_SHIFT, |
41 |
MAJOR_MISC = 7 << MAJOR_SHIFT, |
42 |
|
43 |
// INT/STRING/ARRAY/MAP subtypes |
44 |
LENGTH_EXT1 = 24, |
45 |
LENGTH_EXT2 = 25, |
46 |
LENGTH_EXT4 = 26, |
47 |
LENGTH_EXT8 = 27, |
48 |
|
49 |
// SIMPLE types (effectively MISC subtypes) |
50 |
SIMPLE_FALSE = 20, |
51 |
SIMPLE_TRUE = 21, |
52 |
SIMPLE_NULL = 22, |
53 |
SIMPLE_UNDEF = 23, |
54 |
|
55 |
// MISC subtype (unused) |
56 |
MISC_EXT1 = 24, |
57 |
MISC_FLOAT16 = 25, |
58 |
MISC_FLOAT32 = 26, |
59 |
MISC_FLOAT64 = 27, |
60 |
|
61 |
// BYTES/TEXT/ARRAY/MAP |
62 |
MINOR_INDEF = 31, |
63 |
}; |
64 |
|
65 |
// known tags |
66 |
enum cbor_tag |
67 |
{ |
68 |
// extensions |
69 |
CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref |
70 |
CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object |
71 |
CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object |
72 |
CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing |
73 |
CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing |
74 |
CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref |
75 |
CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection |
76 |
|
77 |
// rfc7049 |
78 |
CBOR_TAG_DATETIME = 0, // rfc4287, utf-8 |
79 |
CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any |
80 |
CBOR_TAG_POS_BIGNUM = 2, // byte string |
81 |
CBOR_TAG_NEG_BIGNUM = 3, // byte string |
82 |
CBOR_TAG_DECIMAL = 4, // decimal fraction, array |
83 |
CBOR_TAG_BIGFLOAT = 5, // array |
84 |
|
85 |
CBOR_TAG_CONV_B64U = 21, // base64url, any |
86 |
CBOR_TAG_CONV_B64 = 22, // base64, any |
87 |
CBOR_TAG_CONV_HEX = 23, // base16, any |
88 |
CBOR_TAG_CBOR = 24, // embedded cbor, byte string |
89 |
|
90 |
CBOR_TAG_URI = 32, // URI rfc3986, utf-8 |
91 |
CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8 |
92 |
CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8 |
93 |
CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8 |
94 |
CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8 |
95 |
|
96 |
CBOR_TAG_MAGIC = 55799, // self-describe cbor |
97 |
}; |
98 |
|
99 |
#define F_SHRINK 0x00000001UL |
100 |
#define F_ALLOW_UNKNOWN 0x00000002UL |
101 |
#define F_ALLOW_SHARING 0x00000004UL |
102 |
#define F_ALLOW_CYCLES 0x00000008UL |
103 |
#define F_PACK_STRINGS 0x00000010UL |
104 |
#define F_VALIDATE_UTF8 0x00000020UL |
105 |
|
106 |
#define INIT_SIZE 32 // initial scalar size to be allocated |
107 |
|
108 |
#define SB do { |
109 |
#define SE } while (0) |
110 |
|
111 |
#define IN_RANGE_INC(type,val,beg,end) \ |
112 |
((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \ |
113 |
<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg))) |
114 |
|
115 |
#define ERR_NESTING_EXCEEDED "cbor text or perl structure exceeds maximum nesting level (max_depth set too low?)" |
116 |
|
117 |
#ifdef USE_ITHREADS |
118 |
# define CBOR_SLOW 1 |
119 |
# define CBOR_STASH (cbor_stash ? cbor_stash : gv_stashpv ("CBOR::XS", 1)) |
120 |
#else |
121 |
# define CBOR_SLOW 0 |
122 |
# define CBOR_STASH cbor_stash |
123 |
#endif |
124 |
|
125 |
static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS:: |
126 |
static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter; |
127 |
|
128 |
typedef struct { |
129 |
U32 flags; |
130 |
U32 max_depth; |
131 |
STRLEN max_size; |
132 |
SV *filter; |
133 |
|
134 |
// for the incremental parser |
135 |
STRLEN incr_pos; // the current offset into the text |
136 |
STRLEN incr_need; // minimum bytes needed to decode |
137 |
AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef. |
138 |
} CBOR; |
139 |
|
140 |
ecb_inline void |
141 |
cbor_init (CBOR *cbor) |
142 |
{ |
143 |
Zero (cbor, 1, CBOR); |
144 |
cbor->max_depth = 512; |
145 |
} |
146 |
|
147 |
ecb_inline void |
148 |
cbor_free (CBOR *cbor) |
149 |
{ |
150 |
SvREFCNT_dec (cbor->filter); |
151 |
SvREFCNT_dec (cbor->incr_count); |
152 |
} |
153 |
|
154 |
///////////////////////////////////////////////////////////////////////////// |
155 |
// utility functions |
156 |
|
157 |
ecb_inline SV * |
158 |
get_bool (const char *name) |
159 |
{ |
160 |
SV *sv = get_sv (name, 1); |
161 |
|
162 |
SvREADONLY_on (sv); |
163 |
SvREADONLY_on (SvRV (sv)); |
164 |
|
165 |
return sv; |
166 |
} |
167 |
|
168 |
ecb_inline void |
169 |
shrink (SV *sv) |
170 |
{ |
171 |
sv_utf8_downgrade (sv, 1); |
172 |
|
173 |
if (SvLEN (sv) > SvCUR (sv) + 1) |
174 |
{ |
175 |
#ifdef SvPV_shrink_to_cur |
176 |
SvPV_shrink_to_cur (sv); |
177 |
#elif defined (SvPV_renew) |
178 |
SvPV_renew (sv, SvCUR (sv) + 1); |
179 |
#endif |
180 |
} |
181 |
} |
182 |
|
183 |
// minimum length of a string to be registered for stringref |
184 |
ecb_inline int |
185 |
minimum_string_length (UV idx) |
186 |
{ |
187 |
return idx > 23 |
188 |
? idx > 0xffU |
189 |
? idx > 0xffffU |
190 |
? idx > 0xffffffffU |
191 |
? 11 |
192 |
: 7 |
193 |
: 5 |
194 |
: 4 |
195 |
: 3; |
196 |
} |
197 |
|
198 |
///////////////////////////////////////////////////////////////////////////// |
199 |
// encoder |
200 |
|
201 |
// structure used for encoding CBOR |
202 |
typedef struct |
203 |
{ |
204 |
char *cur; // SvPVX (sv) + current output position |
205 |
char *end; // SvEND (sv) |
206 |
SV *sv; // result scalar |
207 |
CBOR cbor; |
208 |
U32 depth; // recursion level |
209 |
HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8) |
210 |
UV stringref_idx; |
211 |
HV *shareable; // ptr => index, or 0 |
212 |
UV shareable_idx; |
213 |
} enc_t; |
214 |
|
215 |
ecb_inline void |
216 |
need (enc_t *enc, STRLEN len) |
217 |
{ |
218 |
if (ecb_expect_false (enc->cur + len >= enc->end)) |
219 |
{ |
220 |
STRLEN cur = enc->cur - (char *)SvPVX (enc->sv); |
221 |
SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1); |
222 |
enc->cur = SvPVX (enc->sv) + cur; |
223 |
enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1; |
224 |
} |
225 |
} |
226 |
|
227 |
ecb_inline void |
228 |
encode_ch (enc_t *enc, char ch) |
229 |
{ |
230 |
need (enc, 1); |
231 |
*enc->cur++ = ch; |
232 |
} |
233 |
|
234 |
static void |
235 |
encode_uint (enc_t *enc, int major, UV len) |
236 |
{ |
237 |
need (enc, 9); |
238 |
|
239 |
if (ecb_expect_true (len < LENGTH_EXT1)) |
240 |
*enc->cur++ = major | len; |
241 |
else if (ecb_expect_true (len <= 0xffU)) |
242 |
{ |
243 |
*enc->cur++ = major | LENGTH_EXT1; |
244 |
*enc->cur++ = len; |
245 |
} |
246 |
else if (len <= 0xffffU) |
247 |
{ |
248 |
*enc->cur++ = major | LENGTH_EXT2; |
249 |
*enc->cur++ = len >> 8; |
250 |
*enc->cur++ = len; |
251 |
} |
252 |
else if (len <= 0xffffffffU) |
253 |
{ |
254 |
*enc->cur++ = major | LENGTH_EXT4; |
255 |
*enc->cur++ = len >> 24; |
256 |
*enc->cur++ = len >> 16; |
257 |
*enc->cur++ = len >> 8; |
258 |
*enc->cur++ = len; |
259 |
} |
260 |
else |
261 |
{ |
262 |
*enc->cur++ = major | LENGTH_EXT8; |
263 |
*enc->cur++ = len >> 56; |
264 |
*enc->cur++ = len >> 48; |
265 |
*enc->cur++ = len >> 40; |
266 |
*enc->cur++ = len >> 32; |
267 |
*enc->cur++ = len >> 24; |
268 |
*enc->cur++ = len >> 16; |
269 |
*enc->cur++ = len >> 8; |
270 |
*enc->cur++ = len; |
271 |
} |
272 |
} |
273 |
|
274 |
ecb_inline void |
275 |
encode_tag (enc_t *enc, UV tag) |
276 |
{ |
277 |
encode_uint (enc, MAJOR_TAG, tag); |
278 |
} |
279 |
|
280 |
ecb_inline void |
281 |
encode_str (enc_t *enc, int utf8, char *str, STRLEN len) |
282 |
{ |
283 |
encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len); |
284 |
need (enc, len); |
285 |
memcpy (enc->cur, str, len); |
286 |
enc->cur += len; |
287 |
} |
288 |
|
289 |
static void |
290 |
encode_strref (enc_t *enc, int utf8, char *str, STRLEN len) |
291 |
{ |
292 |
if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS)) |
293 |
{ |
294 |
SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1); |
295 |
|
296 |
if (SvOK (*svp)) |
297 |
{ |
298 |
// already registered, use stringref |
299 |
encode_tag (enc, CBOR_TAG_STRINGREF); |
300 |
encode_uint (enc, MAJOR_POS_INT, SvUV (*svp)); |
301 |
return; |
302 |
} |
303 |
else if (len >= minimum_string_length (enc->stringref_idx)) |
304 |
{ |
305 |
// register only |
306 |
sv_setuv (*svp, enc->stringref_idx); |
307 |
++enc->stringref_idx; |
308 |
} |
309 |
} |
310 |
|
311 |
encode_str (enc, utf8, str, len); |
312 |
} |
313 |
|
314 |
static void encode_sv (enc_t *enc, SV *sv); |
315 |
|
316 |
static void |
317 |
encode_av (enc_t *enc, AV *av) |
318 |
{ |
319 |
int i, len = av_len (av); |
320 |
|
321 |
if (enc->depth >= enc->cbor.max_depth) |
322 |
croak (ERR_NESTING_EXCEEDED); |
323 |
|
324 |
++enc->depth; |
325 |
|
326 |
encode_uint (enc, MAJOR_ARRAY, len + 1); |
327 |
|
328 |
for (i = 0; i <= len; ++i) |
329 |
{ |
330 |
SV **svp = av_fetch (av, i, 0); |
331 |
encode_sv (enc, svp ? *svp : &PL_sv_undef); |
332 |
} |
333 |
|
334 |
--enc->depth; |
335 |
} |
336 |
|
337 |
static void |
338 |
encode_hv (enc_t *enc, HV *hv) |
339 |
{ |
340 |
HE *he; |
341 |
|
342 |
if (enc->depth >= enc->cbor.max_depth) |
343 |
croak (ERR_NESTING_EXCEEDED); |
344 |
|
345 |
++enc->depth; |
346 |
|
347 |
int pairs = hv_iterinit (hv); |
348 |
int mg = SvMAGICAL (hv); |
349 |
|
350 |
if (mg) |
351 |
encode_ch (enc, MAJOR_MAP | MINOR_INDEF); |
352 |
else |
353 |
encode_uint (enc, MAJOR_MAP, pairs); |
354 |
|
355 |
while ((he = hv_iternext (hv))) |
356 |
{ |
357 |
if (HeKLEN (he) == HEf_SVKEY) |
358 |
encode_sv (enc, HeSVKEY (he)); |
359 |
else |
360 |
encode_strref (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he)); |
361 |
|
362 |
encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he)); |
363 |
} |
364 |
|
365 |
if (mg) |
366 |
encode_ch (enc, MAJOR_MISC | MINOR_INDEF); |
367 |
|
368 |
--enc->depth; |
369 |
} |
370 |
|
371 |
// encode objects, arrays and special \0=false and \1=true values. |
372 |
static void |
373 |
encode_rv (enc_t *enc, SV *sv) |
374 |
{ |
375 |
SvGETMAGIC (sv); |
376 |
|
377 |
svtype svt = SvTYPE (sv); |
378 |
|
379 |
if (ecb_expect_false (SvOBJECT (sv))) |
380 |
{ |
381 |
HV *boolean_stash = !CBOR_SLOW || types_boolean_stash |
382 |
? types_boolean_stash |
383 |
: gv_stashpv ("Types::Serialiser::Boolean", 1); |
384 |
HV *error_stash = !CBOR_SLOW || types_error_stash |
385 |
? types_error_stash |
386 |
: gv_stashpv ("Types::Serialiser::Error", 1); |
387 |
HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash |
388 |
? cbor_tagged_stash |
389 |
: gv_stashpv ("CBOR::XS::Tagged" , 1); |
390 |
|
391 |
HV *stash = SvSTASH (sv); |
392 |
|
393 |
if (stash == boolean_stash) |
394 |
{ |
395 |
encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE); |
396 |
return; |
397 |
} |
398 |
else if (stash == error_stash) |
399 |
{ |
400 |
encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF); |
401 |
return; |
402 |
} |
403 |
else if (stash == tagged_stash) |
404 |
{ |
405 |
if (svt != SVt_PVAV) |
406 |
croak ("encountered CBOR::XS::Tagged object that isn't an array"); |
407 |
|
408 |
encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1))); |
409 |
encode_sv (enc, *av_fetch ((AV *)sv, 1, 1)); |
410 |
|
411 |
return; |
412 |
} |
413 |
} |
414 |
|
415 |
if (ecb_expect_false (SvREFCNT (sv) > 1) |
416 |
&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING)) |
417 |
{ |
418 |
if (!enc->shareable) |
419 |
enc->shareable = (HV *)sv_2mortal ((SV *)newHV ()); |
420 |
|
421 |
SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1); |
422 |
|
423 |
if (SvOK (*svp)) |
424 |
{ |
425 |
encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF); |
426 |
encode_uint (enc, MAJOR_POS_INT, SvUV (*svp)); |
427 |
return; |
428 |
} |
429 |
else |
430 |
{ |
431 |
sv_setuv (*svp, enc->shareable_idx); |
432 |
++enc->shareable_idx; |
433 |
encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE); |
434 |
} |
435 |
} |
436 |
|
437 |
if (ecb_expect_false (SvOBJECT (sv))) |
438 |
{ |
439 |
HV *stash = SvSTASH (sv); |
440 |
GV *method; |
441 |
|
442 |
if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0))) |
443 |
{ |
444 |
dSP; |
445 |
|
446 |
ENTER; SAVETMPS; PUSHMARK (SP); |
447 |
// we re-bless the reference to get overload and other niceties right |
448 |
XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash)); |
449 |
|
450 |
PUTBACK; |
451 |
// G_SCALAR ensures that return value is 1 |
452 |
call_sv ((SV *)GvCV (method), G_SCALAR); |
453 |
SPAGAIN; |
454 |
|
455 |
// catch this surprisingly common error |
456 |
if (SvROK (TOPs) && SvRV (TOPs) == sv) |
457 |
croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash)); |
458 |
|
459 |
encode_sv (enc, POPs); |
460 |
|
461 |
PUTBACK; |
462 |
|
463 |
FREETMPS; LEAVE; |
464 |
} |
465 |
else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0) |
466 |
{ |
467 |
dSP; |
468 |
|
469 |
ENTER; SAVETMPS; PUSHMARK (SP); |
470 |
EXTEND (SP, 2); |
471 |
// we re-bless the reference to get overload and other niceties right |
472 |
PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash)); |
473 |
PUSHs (sv_cbor); |
474 |
|
475 |
PUTBACK; |
476 |
int count = call_sv ((SV *)GvCV (method), G_ARRAY); |
477 |
SPAGAIN; |
478 |
|
479 |
// catch this surprisingly common error |
480 |
if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv) |
481 |
croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash)); |
482 |
|
483 |
encode_tag (enc, CBOR_TAG_PERL_OBJECT); |
484 |
encode_uint (enc, MAJOR_ARRAY, count + 1); |
485 |
encode_strref (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash)); |
486 |
|
487 |
while (count) |
488 |
encode_sv (enc, SP[1 - count--]); |
489 |
|
490 |
PUTBACK; |
491 |
|
492 |
FREETMPS; LEAVE; |
493 |
} |
494 |
else |
495 |
croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it", |
496 |
SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
497 |
} |
498 |
else if (svt == SVt_PVHV) |
499 |
encode_hv (enc, (HV *)sv); |
500 |
else if (svt == SVt_PVAV) |
501 |
encode_av (enc, (AV *)sv); |
502 |
else |
503 |
{ |
504 |
encode_tag (enc, CBOR_TAG_INDIRECTION); |
505 |
encode_sv (enc, sv); |
506 |
} |
507 |
} |
508 |
|
509 |
static void |
510 |
encode_nv (enc_t *enc, SV *sv) |
511 |
{ |
512 |
double nv = SvNVX (sv); |
513 |
|
514 |
need (enc, 9); |
515 |
|
516 |
if (ecb_expect_false (nv == (NV)(U32)nv)) |
517 |
encode_uint (enc, MAJOR_POS_INT, (U32)nv); |
518 |
//TODO: maybe I32? |
519 |
else if (ecb_expect_false (nv == (float)nv)) |
520 |
{ |
521 |
uint32_t fp = ecb_float_to_binary32 (nv); |
522 |
|
523 |
*enc->cur++ = MAJOR_MISC | MISC_FLOAT32; |
524 |
|
525 |
if (!ecb_big_endian ()) |
526 |
fp = ecb_bswap32 (fp); |
527 |
|
528 |
memcpy (enc->cur, &fp, 4); |
529 |
enc->cur += 4; |
530 |
} |
531 |
else |
532 |
{ |
533 |
uint64_t fp = ecb_double_to_binary64 (nv); |
534 |
|
535 |
*enc->cur++ = MAJOR_MISC | MISC_FLOAT64; |
536 |
|
537 |
if (!ecb_big_endian ()) |
538 |
fp = ecb_bswap64 (fp); |
539 |
|
540 |
memcpy (enc->cur, &fp, 8); |
541 |
enc->cur += 8; |
542 |
} |
543 |
} |
544 |
|
545 |
static void |
546 |
encode_sv (enc_t *enc, SV *sv) |
547 |
{ |
548 |
SvGETMAGIC (sv); |
549 |
|
550 |
if (SvPOKp (sv)) |
551 |
{ |
552 |
STRLEN len; |
553 |
char *str = SvPV (sv, len); |
554 |
encode_strref (enc, SvUTF8 (sv), str, len); |
555 |
} |
556 |
else if (SvNOKp (sv)) |
557 |
encode_nv (enc, sv); |
558 |
else if (SvIOKp (sv)) |
559 |
{ |
560 |
if (SvIsUV (sv)) |
561 |
encode_uint (enc, MAJOR_POS_INT, SvUVX (sv)); |
562 |
else if (SvIVX (sv) >= 0) |
563 |
encode_uint (enc, MAJOR_POS_INT, SvIVX (sv)); |
564 |
else |
565 |
encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1)); |
566 |
} |
567 |
else if (SvROK (sv)) |
568 |
encode_rv (enc, SvRV (sv)); |
569 |
else if (!SvOK (sv)) |
570 |
encode_ch (enc, MAJOR_MISC | SIMPLE_NULL); |
571 |
else if (enc->cbor.flags & F_ALLOW_UNKNOWN) |
572 |
encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF); |
573 |
else |
574 |
croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data", |
575 |
SvPV_nolen (sv), (unsigned int)SvFLAGS (sv)); |
576 |
} |
577 |
|
578 |
static SV * |
579 |
encode_cbor (SV *scalar, CBOR *cbor) |
580 |
{ |
581 |
enc_t enc = { }; |
582 |
|
583 |
enc.cbor = *cbor; |
584 |
enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); |
585 |
enc.cur = SvPVX (enc.sv); |
586 |
enc.end = SvEND (enc.sv); |
587 |
|
588 |
SvPOK_only (enc.sv); |
589 |
|
590 |
if (cbor->flags & F_PACK_STRINGS) |
591 |
{ |
592 |
encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE); |
593 |
enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ()); |
594 |
enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ()); |
595 |
} |
596 |
|
597 |
encode_sv (&enc, scalar); |
598 |
|
599 |
SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); |
600 |
*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings |
601 |
|
602 |
if (enc.cbor.flags & F_SHRINK) |
603 |
shrink (enc.sv); |
604 |
|
605 |
return enc.sv; |
606 |
} |
607 |
|
608 |
///////////////////////////////////////////////////////////////////////////// |
609 |
// decoder |
610 |
|
611 |
// structure used for decoding CBOR |
612 |
typedef struct |
613 |
{ |
614 |
U8 *cur; // current parser pointer |
615 |
U8 *end; // end of input string |
616 |
const char *err; // parse error, if != 0 |
617 |
CBOR cbor; |
618 |
U32 depth; // recursion depth |
619 |
U32 maxdepth; // recursion depth limit |
620 |
AV *shareable; |
621 |
AV *stringref; |
622 |
SV *decode_tagged; |
623 |
} dec_t; |
624 |
|
625 |
#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE |
626 |
|
627 |
#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data") |
628 |
|
629 |
#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED) |
630 |
#define DEC_DEC_DEPTH --dec->depth |
631 |
|
632 |
static UV |
633 |
decode_uint (dec_t *dec) |
634 |
{ |
635 |
U8 m = *dec->cur & MINOR_MASK; |
636 |
++dec->cur; |
637 |
|
638 |
if (ecb_expect_true (m < LENGTH_EXT1)) |
639 |
return m; |
640 |
else if (ecb_expect_true (m == LENGTH_EXT1)) |
641 |
{ |
642 |
WANT (1); |
643 |
dec->cur += 1; |
644 |
return dec->cur[-1]; |
645 |
} |
646 |
else if (ecb_expect_true (m == LENGTH_EXT2)) |
647 |
{ |
648 |
WANT (2); |
649 |
dec->cur += 2; |
650 |
return (((UV)dec->cur[-2]) << 8) |
651 |
| ((UV)dec->cur[-1]); |
652 |
} |
653 |
else if (ecb_expect_true (m == LENGTH_EXT4)) |
654 |
{ |
655 |
WANT (4); |
656 |
dec->cur += 4; |
657 |
return (((UV)dec->cur[-4]) << 24) |
658 |
| (((UV)dec->cur[-3]) << 16) |
659 |
| (((UV)dec->cur[-2]) << 8) |
660 |
| ((UV)dec->cur[-1]); |
661 |
} |
662 |
else if (ecb_expect_true (m == LENGTH_EXT8)) |
663 |
{ |
664 |
WANT (8); |
665 |
dec->cur += 8; |
666 |
|
667 |
return |
668 |
#if UVSIZE < 8 |
669 |
0 |
670 |
#else |
671 |
(((UV)dec->cur[-8]) << 56) |
672 |
| (((UV)dec->cur[-7]) << 48) |
673 |
| (((UV)dec->cur[-6]) << 40) |
674 |
| (((UV)dec->cur[-5]) << 32) |
675 |
#endif |
676 |
| (((UV)dec->cur[-4]) << 24) |
677 |
| (((UV)dec->cur[-3]) << 16) |
678 |
| (((UV)dec->cur[-2]) << 8) |
679 |
| ((UV)dec->cur[-1]); |
680 |
} |
681 |
else |
682 |
ERR ("corrupted CBOR data (unsupported integer minor encoding)"); |
683 |
|
684 |
fail: |
685 |
return 0; |
686 |
} |
687 |
|
688 |
static SV *decode_sv (dec_t *dec); |
689 |
|
690 |
static SV * |
691 |
decode_av (dec_t *dec) |
692 |
{ |
693 |
AV *av = newAV (); |
694 |
|
695 |
DEC_INC_DEPTH; |
696 |
|
697 |
if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF)) |
698 |
{ |
699 |
++dec->cur; |
700 |
|
701 |
for (;;) |
702 |
{ |
703 |
WANT (1); |
704 |
|
705 |
if (*dec->cur == (MAJOR_MISC | MINOR_INDEF)) |
706 |
{ |
707 |
++dec->cur; |
708 |
break; |
709 |
} |
710 |
|
711 |
av_push (av, decode_sv (dec)); |
712 |
} |
713 |
} |
714 |
else |
715 |
{ |
716 |
int i, len = decode_uint (dec); |
717 |
|
718 |
WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays |
719 |
av_fill (av, len - 1); |
720 |
|
721 |
for (i = 0; i < len; ++i) |
722 |
AvARRAY (av)[i] = decode_sv (dec); |
723 |
} |
724 |
|
725 |
DEC_DEC_DEPTH; |
726 |
return newRV_noinc ((SV *)av); |
727 |
|
728 |
fail: |
729 |
SvREFCNT_dec (av); |
730 |
DEC_DEC_DEPTH; |
731 |
return &PL_sv_undef; |
732 |
} |
733 |
|
734 |
static void |
735 |
decode_he (dec_t *dec, HV *hv) |
736 |
{ |
737 |
// for speed reasons, we specialcase single-string |
738 |
// byte or utf-8 strings as keys, but only when !stringref |
739 |
|
740 |
if (ecb_expect_true (!dec->stringref)) |
741 |
if (ecb_expect_true ((*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8)) |
742 |
{ |
743 |
I32 len = decode_uint (dec); |
744 |
char *key = (char *)dec->cur; |
745 |
|
746 |
dec->cur += len; |
747 |
|
748 |
hv_store (hv, key, len, decode_sv (dec), 0); |
749 |
|
750 |
return; |
751 |
} |
752 |
else if (ecb_expect_true ((*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8)) |
753 |
{ |
754 |
I32 len = decode_uint (dec); |
755 |
char *key = (char *)dec->cur; |
756 |
|
757 |
dec->cur += len; |
758 |
|
759 |
if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8)) |
760 |
if (!is_utf8_string (key, len)) |
761 |
ERR ("corrupted CBOR data (invalid UTF-8 in map key)"); |
762 |
|
763 |
hv_store (hv, key, -len, decode_sv (dec), 0); |
764 |
|
765 |
return; |
766 |
} |
767 |
|
768 |
SV *k = decode_sv (dec); |
769 |
SV *v = decode_sv (dec); |
770 |
|
771 |
hv_store_ent (hv, k, v, 0); |
772 |
SvREFCNT_dec (k); |
773 |
|
774 |
fail: |
775 |
; |
776 |
} |
777 |
|
778 |
static SV * |
779 |
decode_hv (dec_t *dec) |
780 |
{ |
781 |
HV *hv = newHV (); |
782 |
|
783 |
DEC_INC_DEPTH; |
784 |
|
785 |
if (*dec->cur == (MAJOR_MAP | MINOR_INDEF)) |
786 |
{ |
787 |
++dec->cur; |
788 |
|
789 |
for (;;) |
790 |
{ |
791 |
WANT (1); |
792 |
|
793 |
if (*dec->cur == (MAJOR_MISC | MINOR_INDEF)) |
794 |
{ |
795 |
++dec->cur; |
796 |
break; |
797 |
} |
798 |
|
799 |
decode_he (dec, hv); |
800 |
} |
801 |
} |
802 |
else |
803 |
{ |
804 |
int pairs = decode_uint (dec); |
805 |
|
806 |
while (pairs--) |
807 |
decode_he (dec, hv); |
808 |
} |
809 |
|
810 |
DEC_DEC_DEPTH; |
811 |
return newRV_noinc ((SV *)hv); |
812 |
|
813 |
fail: |
814 |
SvREFCNT_dec (hv); |
815 |
DEC_DEC_DEPTH; |
816 |
return &PL_sv_undef; |
817 |
} |
818 |
|
819 |
static SV * |
820 |
decode_str (dec_t *dec, int utf8) |
821 |
{ |
822 |
SV *sv = 0; |
823 |
|
824 |
if ((*dec->cur & MINOR_MASK) == MINOR_INDEF) |
825 |
{ |
826 |
// indefinite length strings |
827 |
++dec->cur; |
828 |
|
829 |
U8 major = *dec->cur & MAJOR_MISC; |
830 |
|
831 |
sv = newSVpvn ("", 0); |
832 |
|
833 |
for (;;) |
834 |
{ |
835 |
WANT (1); |
836 |
|
837 |
if ((*dec->cur - major) > LENGTH_EXT8) |
838 |
if (*dec->cur == (MAJOR_MISC | MINOR_INDEF)) |
839 |
{ |
840 |
++dec->cur; |
841 |
break; |
842 |
} |
843 |
else |
844 |
ERR ("corrupted CBOR data (invalid chunks in indefinite length string)"); |
845 |
|
846 |
STRLEN len = decode_uint (dec); |
847 |
|
848 |
WANT (len); |
849 |
sv_catpvn (sv, dec->cur, len); |
850 |
dec->cur += len; |
851 |
} |
852 |
} |
853 |
else |
854 |
{ |
855 |
STRLEN len = decode_uint (dec); |
856 |
|
857 |
WANT (len); |
858 |
sv = newSVpvn (dec->cur, len); |
859 |
dec->cur += len; |
860 |
|
861 |
if (ecb_expect_false (dec->stringref) |
862 |
&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1)) |
863 |
av_push (dec->stringref, SvREFCNT_inc_NN (sv)); |
864 |
} |
865 |
|
866 |
if (utf8) |
867 |
{ |
868 |
if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8)) |
869 |
if (!is_utf8_string (SvPVX (sv), SvCUR (sv))) |
870 |
ERR ("corrupted CBOR data (invalid UTF-8 in text string)"); |
871 |
|
872 |
SvUTF8_on (sv); |
873 |
} |
874 |
|
875 |
return sv; |
876 |
|
877 |
fail: |
878 |
SvREFCNT_dec (sv); |
879 |
return &PL_sv_undef; |
880 |
} |
881 |
|
882 |
static SV * |
883 |
decode_tagged (dec_t *dec) |
884 |
{ |
885 |
SV *sv = 0; |
886 |
UV tag = decode_uint (dec); |
887 |
|
888 |
WANT (1); |
889 |
|
890 |
switch (tag) |
891 |
{ |
892 |
case CBOR_TAG_MAGIC: |
893 |
sv = decode_sv (dec); |
894 |
break; |
895 |
|
896 |
case CBOR_TAG_INDIRECTION: |
897 |
sv = newRV_noinc (decode_sv (dec)); |
898 |
break; |
899 |
|
900 |
case CBOR_TAG_STRINGREF_NAMESPACE: |
901 |
{ |
902 |
ENTER; SAVETMPS; |
903 |
|
904 |
SAVESPTR (dec->stringref); |
905 |
dec->stringref = (AV *)sv_2mortal ((SV *)newAV ()); |
906 |
|
907 |
sv = decode_sv (dec); |
908 |
|
909 |
FREETMPS; LEAVE; |
910 |
} |
911 |
break; |
912 |
|
913 |
case CBOR_TAG_STRINGREF: |
914 |
{ |
915 |
if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT)) |
916 |
ERR ("corrupted CBOR data (stringref index not an unsigned integer)"); |
917 |
|
918 |
UV idx = decode_uint (dec); |
919 |
|
920 |
if (!dec->stringref || (int)idx > AvFILLp (dec->stringref)) |
921 |
ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)"); |
922 |
|
923 |
sv = newSVsv (AvARRAY (dec->stringref)[idx]); |
924 |
} |
925 |
break; |
926 |
|
927 |
case CBOR_TAG_VALUE_SHAREABLE: |
928 |
{ |
929 |
if (ecb_expect_false (!dec->shareable)) |
930 |
dec->shareable = (AV *)sv_2mortal ((SV *)newAV ()); |
931 |
|
932 |
if (dec->cbor.flags & F_ALLOW_CYCLES) |
933 |
{ |
934 |
sv = newSV (0); |
935 |
av_push (dec->shareable, SvREFCNT_inc_NN (sv)); |
936 |
|
937 |
SV *osv = decode_sv (dec); |
938 |
sv_setsv (sv, osv); |
939 |
SvREFCNT_dec_NN (osv); |
940 |
} |
941 |
else |
942 |
{ |
943 |
av_push (dec->shareable, &PL_sv_undef); |
944 |
int idx = AvFILLp (dec->shareable); |
945 |
sv = decode_sv (dec); |
946 |
av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv)); |
947 |
} |
948 |
} |
949 |
break; |
950 |
|
951 |
case CBOR_TAG_VALUE_SHAREDREF: |
952 |
{ |
953 |
if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT)) |
954 |
ERR ("corrupted CBOR data (sharedref index not an unsigned integer)"); |
955 |
|
956 |
UV idx = decode_uint (dec); |
957 |
|
958 |
if (!dec->shareable || (int)idx > AvFILLp (dec->shareable)) |
959 |
ERR ("corrupted CBOR data (sharedref index out of bounds)"); |
960 |
|
961 |
sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]); |
962 |
|
963 |
if (sv == &PL_sv_undef) |
964 |
ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled"); |
965 |
} |
966 |
break; |
967 |
|
968 |
case CBOR_TAG_PERL_OBJECT: |
969 |
{ |
970 |
sv = decode_sv (dec); |
971 |
|
972 |
if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV) |
973 |
ERR ("corrupted CBOR data (non-array perl object)"); |
974 |
|
975 |
AV *av = (AV *)SvRV (sv); |
976 |
int len = av_len (av) + 1; |
977 |
HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0); |
978 |
|
979 |
if (!stash) |
980 |
ERR ("cannot decode perl-object (package does not exist)"); |
981 |
|
982 |
GV *method = gv_fetchmethod_autoload (stash, "THAW", 0); |
983 |
|
984 |
if (!method) |
985 |
ERR ("cannot decode perl-object (package does not have a THAW method)"); |
986 |
|
987 |
dSP; |
988 |
|
989 |
ENTER; SAVETMPS; PUSHMARK (SP); |
990 |
EXTEND (SP, len + 1); |
991 |
// we re-bless the reference to get overload and other niceties right |
992 |
PUSHs (*av_fetch (av, 0, 1)); |
993 |
PUSHs (sv_cbor); |
994 |
|
995 |
int i; |
996 |
|
997 |
for (i = 1; i < len; ++i) |
998 |
PUSHs (*av_fetch (av, i, 1)); |
999 |
|
1000 |
PUTBACK; |
1001 |
call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL); |
1002 |
SPAGAIN; |
1003 |
|
1004 |
if (SvTRUE (ERRSV)) |
1005 |
{ |
1006 |
FREETMPS; LEAVE; |
1007 |
ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV)))); |
1008 |
} |
1009 |
|
1010 |
SvREFCNT_dec (sv); |
1011 |
sv = SvREFCNT_inc (POPs); |
1012 |
|
1013 |
PUTBACK; |
1014 |
|
1015 |
FREETMPS; LEAVE; |
1016 |
} |
1017 |
break; |
1018 |
|
1019 |
default: |
1020 |
{ |
1021 |
sv = decode_sv (dec); |
1022 |
|
1023 |
dSP; |
1024 |
ENTER; SAVETMPS; PUSHMARK (SP); |
1025 |
EXTEND (SP, 2); |
1026 |
PUSHs (newSVuv (tag)); |
1027 |
PUSHs (sv); |
1028 |
|
1029 |
PUTBACK; |
1030 |
int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL); |
1031 |
SPAGAIN; |
1032 |
|
1033 |
if (SvTRUE (ERRSV)) |
1034 |
{ |
1035 |
FREETMPS; LEAVE; |
1036 |
ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV)))); |
1037 |
} |
1038 |
|
1039 |
if (count) |
1040 |
{ |
1041 |
SvREFCNT_dec (sv); |
1042 |
sv = SvREFCNT_inc (POPs); |
1043 |
} |
1044 |
else |
1045 |
{ |
1046 |
AV *av = newAV (); |
1047 |
av_push (av, newSVuv (tag)); |
1048 |
av_push (av, sv); |
1049 |
|
1050 |
HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash |
1051 |
? cbor_tagged_stash |
1052 |
: gv_stashpv ("CBOR::XS::Tagged" , 1); |
1053 |
sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash); |
1054 |
} |
1055 |
|
1056 |
PUTBACK; |
1057 |
|
1058 |
FREETMPS; LEAVE; |
1059 |
} |
1060 |
break; |
1061 |
} |
1062 |
|
1063 |
return sv; |
1064 |
|
1065 |
fail: |
1066 |
SvREFCNT_dec (sv); |
1067 |
return &PL_sv_undef; |
1068 |
} |
1069 |
|
1070 |
static SV * |
1071 |
decode_sv (dec_t *dec) |
1072 |
{ |
1073 |
WANT (1); |
1074 |
|
1075 |
switch (*dec->cur >> MAJOR_SHIFT) |
1076 |
{ |
1077 |
case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec)); |
1078 |
case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec)); |
1079 |
case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0); |
1080 |
case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1); |
1081 |
case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec); |
1082 |
case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec); |
1083 |
case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec); |
1084 |
|
1085 |
case MAJOR_MISC >> MAJOR_SHIFT: |
1086 |
switch (*dec->cur++ & MINOR_MASK) |
1087 |
{ |
1088 |
case SIMPLE_FALSE: |
1089 |
#if CBOR_SLOW |
1090 |
types_false = get_bool ("Types::Serialiser::false"); |
1091 |
#endif |
1092 |
return newSVsv (types_false); |
1093 |
case SIMPLE_TRUE: |
1094 |
#if CBOR_SLOW |
1095 |
types_true = get_bool ("Types::Serialiser::true"); |
1096 |
#endif |
1097 |
return newSVsv (types_true); |
1098 |
case SIMPLE_NULL: |
1099 |
return newSVsv (&PL_sv_undef); |
1100 |
case SIMPLE_UNDEF: |
1101 |
#if CBOR_SLOW |
1102 |
types_error = get_bool ("Types::Serialiser::error"); |
1103 |
#endif |
1104 |
return newSVsv (types_error); |
1105 |
|
1106 |
case MISC_FLOAT16: |
1107 |
{ |
1108 |
WANT (2); |
1109 |
|
1110 |
uint16_t fp = (dec->cur[0] << 8) | dec->cur[1]; |
1111 |
dec->cur += 2; |
1112 |
|
1113 |
return newSVnv (ecb_binary16_to_float (fp)); |
1114 |
} |
1115 |
|
1116 |
case MISC_FLOAT32: |
1117 |
{ |
1118 |
uint32_t fp; |
1119 |
WANT (4); |
1120 |
memcpy (&fp, dec->cur, 4); |
1121 |
dec->cur += 4; |
1122 |
|
1123 |
if (!ecb_big_endian ()) |
1124 |
fp = ecb_bswap32 (fp); |
1125 |
|
1126 |
return newSVnv (ecb_binary32_to_float (fp)); |
1127 |
} |
1128 |
|
1129 |
case MISC_FLOAT64: |
1130 |
{ |
1131 |
uint64_t fp; |
1132 |
WANT (8); |
1133 |
memcpy (&fp, dec->cur, 8); |
1134 |
dec->cur += 8; |
1135 |
|
1136 |
if (!ecb_big_endian ()) |
1137 |
fp = ecb_bswap64 (fp); |
1138 |
|
1139 |
return newSVnv (ecb_binary64_to_double (fp)); |
1140 |
} |
1141 |
|
1142 |
// 0..19 unassigned simple |
1143 |
// 24 reserved + unassigned simple (reserved values are not encodable) |
1144 |
// 28-30 unassigned misc |
1145 |
// 31 break code |
1146 |
default: |
1147 |
ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)"); |
1148 |
} |
1149 |
|
1150 |
break; |
1151 |
} |
1152 |
|
1153 |
fail: |
1154 |
return &PL_sv_undef; |
1155 |
} |
1156 |
|
1157 |
static SV * |
1158 |
decode_cbor (SV *string, CBOR *cbor, char **offset_return) |
1159 |
{ |
1160 |
dec_t dec = { }; |
1161 |
SV *sv; |
1162 |
STRLEN len; |
1163 |
char *data = SvPVbyte (string, len); |
1164 |
|
1165 |
if (len > cbor->max_size && cbor->max_size) |
1166 |
croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu", |
1167 |
(unsigned long)len, (unsigned long)cbor->max_size); |
1168 |
|
1169 |
dec.cbor = *cbor; |
1170 |
dec.cur = (U8 *)data; |
1171 |
dec.end = (U8 *)data + len; |
1172 |
|
1173 |
sv = decode_sv (&dec); |
1174 |
|
1175 |
if (offset_return) |
1176 |
*offset_return = dec.cur; |
1177 |
|
1178 |
if (!(offset_return || !sv)) |
1179 |
if (dec.cur != dec.end && !dec.err) |
1180 |
dec.err = "garbage after CBOR object"; |
1181 |
|
1182 |
if (dec.err) |
1183 |
{ |
1184 |
if (dec.shareable) |
1185 |
{ |
1186 |
// need to break cyclic links, which whould all be in shareable |
1187 |
int i; |
1188 |
SV **svp; |
1189 |
|
1190 |
for (i = av_len (dec.shareable) + 1; i--; ) |
1191 |
if ((svp = av_fetch (dec.shareable, i, 0))) |
1192 |
sv_setsv (*svp, &PL_sv_undef); |
1193 |
} |
1194 |
|
1195 |
SvREFCNT_dec (sv); |
1196 |
croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur); |
1197 |
} |
1198 |
|
1199 |
sv = sv_2mortal (sv); |
1200 |
|
1201 |
return sv; |
1202 |
} |
1203 |
|
1204 |
///////////////////////////////////////////////////////////////////////////// |
1205 |
// incremental parser |
1206 |
|
1207 |
#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0) |
1208 |
|
1209 |
// returns 0 for notyet, 1 for success or error |
1210 |
static int |
1211 |
incr_parse (CBOR *self, SV *cborstr) |
1212 |
{ |
1213 |
STRLEN cur; |
1214 |
SvPV (cborstr, cur); |
1215 |
|
1216 |
while (ecb_expect_true (self->incr_need <= cur)) |
1217 |
{ |
1218 |
// table of integer count bytes |
1219 |
static I8 incr_len[MINOR_MASK + 1] = { |
1220 |
0, 0, 0, 0, 0, 0, 0, 0, |
1221 |
0, 0, 0, 0, 0, 0, 0, 0, |
1222 |
0, 0, 0, 0, 0, 0, 0, 0, |
1223 |
1, 2, 4, 8,-1,-1,-1,-2 |
1224 |
}; |
1225 |
|
1226 |
const U8 *p = SvPVX (cborstr) + self->incr_pos; |
1227 |
U8 m = *p & MINOR_MASK; |
1228 |
IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]); |
1229 |
I8 ilen = incr_len[m]; |
1230 |
|
1231 |
self->incr_need = self->incr_pos + 1; |
1232 |
|
1233 |
if (ecb_expect_false (ilen < 0)) |
1234 |
{ |
1235 |
if (m != MINOR_INDEF) |
1236 |
return 1; // error |
1237 |
|
1238 |
if (*p == (MAJOR_MISC | MINOR_INDEF)) |
1239 |
{ |
1240 |
if (count >= 0) |
1241 |
return 1; // error |
1242 |
|
1243 |
count = 1; |
1244 |
} |
1245 |
else |
1246 |
{ |
1247 |
av_push (self->incr_count, newSViv (-1)); //TODO: nest |
1248 |
count = -1; |
1249 |
} |
1250 |
} |
1251 |
else |
1252 |
{ |
1253 |
self->incr_need += ilen; |
1254 |
if (ecb_expect_false (self->incr_need > cur)) |
1255 |
return 0; |
1256 |
|
1257 |
int major = *p >> MAJOR_SHIFT; |
1258 |
|
1259 |
switch (major) |
1260 |
{ |
1261 |
case MAJOR_BYTES >> MAJOR_SHIFT: |
1262 |
case MAJOR_TEXT >> MAJOR_SHIFT: |
1263 |
case MAJOR_ARRAY >> MAJOR_SHIFT: |
1264 |
case MAJOR_MAP >> MAJOR_SHIFT: |
1265 |
{ |
1266 |
UV len; |
1267 |
|
1268 |
if (ecb_expect_false (ilen)) |
1269 |
{ |
1270 |
len = 0; |
1271 |
|
1272 |
do { |
1273 |
len = (len << 8) | *++p; |
1274 |
} while (--ilen); |
1275 |
} |
1276 |
else |
1277 |
len = m; |
1278 |
|
1279 |
switch (major) |
1280 |
{ |
1281 |
case MAJOR_BYTES >> MAJOR_SHIFT: |
1282 |
case MAJOR_TEXT >> MAJOR_SHIFT: |
1283 |
self->incr_need += len; |
1284 |
if (ecb_expect_false (self->incr_need > cur)) |
1285 |
return 0; |
1286 |
|
1287 |
break; |
1288 |
|
1289 |
case MAJOR_MAP >> MAJOR_SHIFT: |
1290 |
len <<= 1; |
1291 |
case MAJOR_ARRAY >> MAJOR_SHIFT: |
1292 |
if (len) |
1293 |
{ |
1294 |
av_push (self->incr_count, newSViv (len + 1)); //TODO: nest |
1295 |
count = len + 1; |
1296 |
} |
1297 |
break; |
1298 |
} |
1299 |
} |
1300 |
} |
1301 |
} |
1302 |
|
1303 |
self->incr_pos = self->incr_need; |
1304 |
|
1305 |
if (count > 0) |
1306 |
{ |
1307 |
while (!--count) |
1308 |
{ |
1309 |
if (!AvFILLp (self->incr_count)) |
1310 |
return 1; // done |
1311 |
|
1312 |
SvREFCNT_dec_NN (av_pop (self->incr_count)); |
1313 |
count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]); |
1314 |
} |
1315 |
|
1316 |
SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count; |
1317 |
} |
1318 |
} |
1319 |
|
1320 |
return 0; |
1321 |
} |
1322 |
|
1323 |
|
1324 |
///////////////////////////////////////////////////////////////////////////// |
1325 |
// XS interface functions |
1326 |
|
1327 |
MODULE = CBOR::XS PACKAGE = CBOR::XS |
1328 |
|
1329 |
BOOT: |
1330 |
{ |
1331 |
cbor_stash = gv_stashpv ("CBOR::XS" , 1); |
1332 |
cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1); |
1333 |
|
1334 |
types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1); |
1335 |
types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1); |
1336 |
|
1337 |
types_true = get_bool ("Types::Serialiser::true" ); |
1338 |
types_false = get_bool ("Types::Serialiser::false"); |
1339 |
types_error = get_bool ("Types::Serialiser::error"); |
1340 |
|
1341 |
default_filter = newSVpv ("CBOR::XS::default_filter", 0); |
1342 |
|
1343 |
sv_cbor = newSVpv ("CBOR", 0); |
1344 |
SvREADONLY_on (sv_cbor); |
1345 |
} |
1346 |
|
1347 |
PROTOTYPES: DISABLE |
1348 |
|
1349 |
void CLONE (...) |
1350 |
CODE: |
1351 |
cbor_stash = 0; |
1352 |
cbor_tagged_stash = 0; |
1353 |
types_error_stash = 0; |
1354 |
types_boolean_stash = 0; |
1355 |
|
1356 |
void new (char *klass) |
1357 |
PPCODE: |
1358 |
{ |
1359 |
SV *pv = NEWSV (0, sizeof (CBOR)); |
1360 |
SvPOK_only (pv); |
1361 |
cbor_init ((CBOR *)SvPVX (pv)); |
1362 |
XPUSHs (sv_2mortal (sv_bless ( |
1363 |
newRV_noinc (pv), |
1364 |
strEQ (klass, "CBOR::XS") ? CBOR_STASH : gv_stashpv (klass, 1) |
1365 |
))); |
1366 |
} |
1367 |
|
1368 |
void shrink (CBOR *self, int enable = 1) |
1369 |
ALIAS: |
1370 |
shrink = F_SHRINK |
1371 |
allow_unknown = F_ALLOW_UNKNOWN |
1372 |
allow_sharing = F_ALLOW_SHARING |
1373 |
allow_cycles = F_ALLOW_CYCLES |
1374 |
pack_strings = F_PACK_STRINGS |
1375 |
validate_utf8 = F_VALIDATE_UTF8 |
1376 |
PPCODE: |
1377 |
{ |
1378 |
if (enable) |
1379 |
self->flags |= ix; |
1380 |
else |
1381 |
self->flags &= ~ix; |
1382 |
|
1383 |
XPUSHs (ST (0)); |
1384 |
} |
1385 |
|
1386 |
void get_shrink (CBOR *self) |
1387 |
ALIAS: |
1388 |
get_shrink = F_SHRINK |
1389 |
get_allow_unknown = F_ALLOW_UNKNOWN |
1390 |
get_allow_sharing = F_ALLOW_SHARING |
1391 |
get_allow_cycles = F_ALLOW_CYCLES |
1392 |
get_pack_strings = F_PACK_STRINGS |
1393 |
get_validate_utf8 = F_VALIDATE_UTF8 |
1394 |
PPCODE: |
1395 |
XPUSHs (boolSV (self->flags & ix)); |
1396 |
|
1397 |
void max_depth (CBOR *self, U32 max_depth = 0x80000000UL) |
1398 |
PPCODE: |
1399 |
self->max_depth = max_depth; |
1400 |
XPUSHs (ST (0)); |
1401 |
|
1402 |
U32 get_max_depth (CBOR *self) |
1403 |
CODE: |
1404 |
RETVAL = self->max_depth; |
1405 |
OUTPUT: |
1406 |
RETVAL |
1407 |
|
1408 |
void max_size (CBOR *self, U32 max_size = 0) |
1409 |
PPCODE: |
1410 |
self->max_size = max_size; |
1411 |
XPUSHs (ST (0)); |
1412 |
|
1413 |
int get_max_size (CBOR *self) |
1414 |
CODE: |
1415 |
RETVAL = self->max_size; |
1416 |
OUTPUT: |
1417 |
RETVAL |
1418 |
|
1419 |
void filter (CBOR *self, SV *filter = 0) |
1420 |
PPCODE: |
1421 |
SvREFCNT_dec (self->filter); |
1422 |
self->filter = filter ? newSVsv (filter) : filter; |
1423 |
XPUSHs (ST (0)); |
1424 |
|
1425 |
SV *get_filter (CBOR *self) |
1426 |
CODE: |
1427 |
RETVAL = self->filter ? self->filter : NEWSV (0, 0); |
1428 |
OUTPUT: |
1429 |
RETVAL |
1430 |
|
1431 |
void encode (CBOR *self, SV *scalar) |
1432 |
PPCODE: |
1433 |
PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN; |
1434 |
XPUSHs (scalar); |
1435 |
|
1436 |
void decode (CBOR *self, SV *cborstr) |
1437 |
PPCODE: |
1438 |
PUTBACK; cborstr = decode_cbor (cborstr, self, 0); SPAGAIN; |
1439 |
XPUSHs (cborstr); |
1440 |
|
1441 |
void decode_prefix (CBOR *self, SV *cborstr) |
1442 |
PPCODE: |
1443 |
{ |
1444 |
SV *sv; |
1445 |
char *offset; |
1446 |
PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN; |
1447 |
EXTEND (SP, 2); |
1448 |
PUSHs (sv); |
1449 |
PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr)))); |
1450 |
} |
1451 |
|
1452 |
void incr_parse (CBOR *self, SV *cborstr, int chop = 0) |
1453 |
PPCODE: |
1454 |
{ |
1455 |
if (SvUTF8 (cborstr)) |
1456 |
sv_utf8_downgrade (cborstr, 0); |
1457 |
|
1458 |
if (!self->incr_count) |
1459 |
{ |
1460 |
self->incr_count = newAV (); |
1461 |
self->incr_pos = 0; |
1462 |
self->incr_need = 1; |
1463 |
|
1464 |
av_push (self->incr_count, newSViv (1)); |
1465 |
} |
1466 |
|
1467 |
for (;;) |
1468 |
{ |
1469 |
if (!incr_parse (self, cborstr)) |
1470 |
{ |
1471 |
if (self->incr_need > self->max_size && self->max_size) |
1472 |
croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu", |
1473 |
(unsigned long)self->incr_need, (unsigned long)self->max_size); |
1474 |
|
1475 |
break; |
1476 |
} |
1477 |
|
1478 |
SV *sv; |
1479 |
char *offset; |
1480 |
|
1481 |
PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN; |
1482 |
XPUSHs (sv); |
1483 |
|
1484 |
av_clear (self->incr_count); |
1485 |
av_push (self->incr_count, newSViv (1)); |
1486 |
|
1487 |
if (chop) |
1488 |
{ |
1489 |
self->incr_pos = 0; |
1490 |
sv_chop (cborstr, offset); |
1491 |
} |
1492 |
else |
1493 |
self->incr_pos = offset - SvPVX (cborstr); |
1494 |
|
1495 |
self->incr_need = self->incr_pos + 1; |
1496 |
} |
1497 |
} |
1498 |
|
1499 |
void incr_reset (CBOR *self) |
1500 |
CODE: |
1501 |
{ |
1502 |
SvREFCNT_dec (self->incr_count); |
1503 |
self->incr_count = 0; |
1504 |
} |
1505 |
|
1506 |
void DESTROY (CBOR *self) |
1507 |
PPCODE: |
1508 |
cbor_free (self); |
1509 |
|
1510 |
PROTOTYPES: ENABLE |
1511 |
|
1512 |
void encode_cbor (SV *scalar) |
1513 |
ALIAS: |
1514 |
encode_cbor = 0 |
1515 |
encode_cbor_sharing = F_ALLOW_SHARING |
1516 |
PPCODE: |
1517 |
{ |
1518 |
CBOR cbor; |
1519 |
cbor_init (&cbor); |
1520 |
cbor.flags |= ix; |
1521 |
PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN; |
1522 |
XPUSHs (scalar); |
1523 |
} |
1524 |
|
1525 |
void decode_cbor (SV *cborstr) |
1526 |
PPCODE: |
1527 |
{ |
1528 |
CBOR cbor; |
1529 |
cbor_init (&cbor); |
1530 |
PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN; |
1531 |
XPUSHs (cborstr); |
1532 |
} |
1533 |
|