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 |
#define ECB_NO_THREADS 1 |
13 |
#include "ecb.h" |
14 |
|
15 |
// compatibility with perl <5.18 |
16 |
#ifndef HvNAMELEN_get |
17 |
# define HvNAMELEN_get(hv) strlen (HvNAME (hv)) |
18 |
#endif |
19 |
#ifndef HvNAMELEN |
20 |
# define HvNAMELEN(hv) HvNAMELEN_get (hv) |
21 |
#endif |
22 |
#ifndef HvNAMEUTF8 |
23 |
# define HvNAMEUTF8(hv) 0 |
24 |
#endif |
25 |
#ifndef SvREFCNT_dec_NN |
26 |
# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv) |
27 |
#endif |
28 |
|
29 |
// known major and minor types |
30 |
enum cbor_type |
31 |
{ |
32 |
MAJOR_SHIFT = 5, |
33 |
MINOR_MASK = 0x1f, |
34 |
|
35 |
MAJOR_POS_INT = 0 << MAJOR_SHIFT, |
36 |
MAJOR_NEG_INT = 1 << MAJOR_SHIFT, |
37 |
MAJOR_BYTES = 2 << MAJOR_SHIFT, |
38 |
MAJOR_TEXT = 3 << MAJOR_SHIFT, |
39 |
MAJOR_ARRAY = 4 << MAJOR_SHIFT, |
40 |
MAJOR_MAP = 5 << MAJOR_SHIFT, |
41 |
MAJOR_TAG = 6 << MAJOR_SHIFT, |
42 |
MAJOR_MISC = 7 << MAJOR_SHIFT, |
43 |
|
44 |
// INT/STRING/ARRAY/MAP subtypes |
45 |
LENGTH_EXT1 = 24, |
46 |
LENGTH_EXT2 = 25, |
47 |
LENGTH_EXT4 = 26, |
48 |
LENGTH_EXT8 = 27, |
49 |
|
50 |
// SIMPLE types (effectively MISC subtypes) |
51 |
SIMPLE_FALSE = 20, |
52 |
SIMPLE_TRUE = 21, |
53 |
SIMPLE_NULL = 22, |
54 |
SIMPLE_UNDEF = 23, |
55 |
|
56 |
// MISC subtype (unused) |
57 |
MISC_EXT1 = 24, |
58 |
MISC_FLOAT16 = 25, |
59 |
MISC_FLOAT32 = 26, |
60 |
MISC_FLOAT64 = 27, |
61 |
|
62 |
// BYTES/TEXT/ARRAY/MAP |
63 |
MINOR_INDEF = 31, |
64 |
}; |
65 |
|
66 |
// known tags |
67 |
enum cbor_tag |
68 |
{ |
69 |
// extensions |
70 |
CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref |
71 |
CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object |
72 |
CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object |
73 |
CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing |
74 |
CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing |
75 |
CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref |
76 |
CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection |
77 |
|
78 |
// rfc7049 |
79 |
CBOR_TAG_DATETIME = 0, // rfc4287, utf-8 |
80 |
CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any |
81 |
CBOR_TAG_POS_BIGNUM = 2, // byte string |
82 |
CBOR_TAG_NEG_BIGNUM = 3, // byte string |
83 |
CBOR_TAG_DECIMAL = 4, // decimal fraction, array |
84 |
CBOR_TAG_BIGFLOAT = 5, // array |
85 |
|
86 |
CBOR_TAG_CONV_B64U = 21, // base64url, any |
87 |
CBOR_TAG_CONV_B64 = 22, // base64, any |
88 |
CBOR_TAG_CONV_HEX = 23, // base16, any |
89 |
CBOR_TAG_CBOR = 24, // embedded cbor, byte string |
90 |
|
91 |
CBOR_TAG_URI = 32, // URI rfc3986, utf-8 |
92 |
CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8 |
93 |
CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8 |
94 |
CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8 |
95 |
CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8 |
96 |
|
97 |
CBOR_TAG_MAGIC = 55799, // self-describe cbor |
98 |
}; |
99 |
|
100 |
#define F_SHRINK 0x00000001UL |
101 |
#define F_ALLOW_UNKNOWN 0x00000002UL |
102 |
#define F_ALLOW_SHARING 0x00000004UL |
103 |
#define F_ALLOW_CYCLES 0x00000008UL |
104 |
#define F_FORBID_OBJECTS 0x00000010UL |
105 |
#define F_PACK_STRINGS 0x00000020UL |
106 |
#define F_TEXT_KEYS 0x00000040UL |
107 |
#define F_TEXT_STRINGS 0x00000080UL |
108 |
#define F_VALIDATE_UTF8 0x00000100UL |
109 |
|
110 |
#define INIT_SIZE 32 // initial scalar size to be allocated |
111 |
|
112 |
#define SB do { |
113 |
#define SE } while (0) |
114 |
|
115 |
#define IN_RANGE_INC(type,val,beg,end) \ |
116 |
((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \ |
117 |
<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg))) |
118 |
|
119 |
#define ERR_NESTING_EXCEEDED "cbor text or perl structure exceeds maximum nesting level (max_depth set too low?)" |
120 |
|
121 |
#ifdef USE_ITHREADS |
122 |
# define CBOR_SLOW 1 |
123 |
# define CBOR_STASH (cbor_stash ? cbor_stash : gv_stashpv ("CBOR::XS", 1)) |
124 |
#else |
125 |
# define CBOR_SLOW 0 |
126 |
# define CBOR_STASH cbor_stash |
127 |
#endif |
128 |
|
129 |
static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS:: |
130 |
static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter; |
131 |
|
132 |
typedef struct { |
133 |
U32 flags; |
134 |
U32 max_depth; |
135 |
STRLEN max_size; |
136 |
SV *filter; |
137 |
|
138 |
// for the incremental parser |
139 |
STRLEN incr_pos; // the current offset into the text |
140 |
STRLEN incr_need; // minimum bytes needed to decode |
141 |
AV *incr_count; // for every nesting level, the number of outstanding values, or -1 for indef. |
142 |
} CBOR; |
143 |
|
144 |
ecb_inline void |
145 |
cbor_init (CBOR *cbor) |
146 |
{ |
147 |
Zero (cbor, 1, CBOR); |
148 |
cbor->max_depth = 512; |
149 |
} |
150 |
|
151 |
ecb_inline void |
152 |
cbor_free (CBOR *cbor) |
153 |
{ |
154 |
SvREFCNT_dec (cbor->filter); |
155 |
SvREFCNT_dec (cbor->incr_count); |
156 |
} |
157 |
|
158 |
///////////////////////////////////////////////////////////////////////////// |
159 |
// utility functions |
160 |
|
161 |
ecb_inline SV * |
162 |
get_bool (const char *name) |
163 |
{ |
164 |
SV *sv = get_sv (name, 1); |
165 |
|
166 |
SvREADONLY_on (sv); |
167 |
SvREADONLY_on (SvRV (sv)); |
168 |
|
169 |
return sv; |
170 |
} |
171 |
|
172 |
ecb_inline void |
173 |
shrink (SV *sv) |
174 |
{ |
175 |
sv_utf8_downgrade (sv, 1); |
176 |
|
177 |
if (SvLEN (sv) > SvCUR (sv) + 1) |
178 |
{ |
179 |
#ifdef SvPV_shrink_to_cur |
180 |
SvPV_shrink_to_cur (sv); |
181 |
#elif defined (SvPV_renew) |
182 |
SvPV_renew (sv, SvCUR (sv) + 1); |
183 |
#endif |
184 |
} |
185 |
} |
186 |
|
187 |
// minimum length of a string to be registered for stringref |
188 |
ecb_inline int |
189 |
minimum_string_length (UV idx) |
190 |
{ |
191 |
return idx > 23 |
192 |
? idx > 0xffU |
193 |
? idx > 0xffffU |
194 |
? idx > 0xffffffffU |
195 |
? 11 |
196 |
: 7 |
197 |
: 5 |
198 |
: 4 |
199 |
: 3; |
200 |
} |
201 |
|
202 |
///////////////////////////////////////////////////////////////////////////// |
203 |
// encoder |
204 |
|
205 |
// structure used for encoding CBOR |
206 |
typedef struct |
207 |
{ |
208 |
char *cur; // SvPVX (sv) + current output position |
209 |
char *end; // SvEND (sv) |
210 |
SV *sv; // result scalar |
211 |
CBOR cbor; |
212 |
U32 depth; // recursion level |
213 |
HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8) |
214 |
UV stringref_idx; |
215 |
HV *shareable; // ptr => index, or 0 |
216 |
UV shareable_idx; |
217 |
} enc_t; |
218 |
|
219 |
ecb_inline void |
220 |
need (enc_t *enc, STRLEN len) |
221 |
{ |
222 |
if (ecb_expect_false (enc->cur + len >= enc->end)) |
223 |
{ |
224 |
STRLEN cur = enc->cur - (char *)SvPVX (enc->sv); |
225 |
SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1); |
226 |
enc->cur = SvPVX (enc->sv) + cur; |
227 |
enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1; |
228 |
} |
229 |
} |
230 |
|
231 |
ecb_inline void |
232 |
encode_ch (enc_t *enc, char ch) |
233 |
{ |
234 |
need (enc, 1); |
235 |
*enc->cur++ = ch; |
236 |
} |
237 |
|
238 |
static void |
239 |
encode_uint (enc_t *enc, int major, UV len) |
240 |
{ |
241 |
need (enc, 9); |
242 |
|
243 |
if (ecb_expect_true (len < LENGTH_EXT1)) |
244 |
*enc->cur++ = major | len; |
245 |
else if (ecb_expect_true (len <= 0xffU)) |
246 |
{ |
247 |
*enc->cur++ = major | LENGTH_EXT1; |
248 |
*enc->cur++ = len; |
249 |
} |
250 |
else if (len <= 0xffffU) |
251 |
{ |
252 |
*enc->cur++ = major | LENGTH_EXT2; |
253 |
*enc->cur++ = len >> 8; |
254 |
*enc->cur++ = len; |
255 |
} |
256 |
else if (len <= 0xffffffffU) |
257 |
{ |
258 |
*enc->cur++ = major | LENGTH_EXT4; |
259 |
*enc->cur++ = len >> 24; |
260 |
*enc->cur++ = len >> 16; |
261 |
*enc->cur++ = len >> 8; |
262 |
*enc->cur++ = len; |
263 |
} |
264 |
else |
265 |
{ |
266 |
*enc->cur++ = major | LENGTH_EXT8; |
267 |
*enc->cur++ = len >> 56; |
268 |
*enc->cur++ = len >> 48; |
269 |
*enc->cur++ = len >> 40; |
270 |
*enc->cur++ = len >> 32; |
271 |
*enc->cur++ = len >> 24; |
272 |
*enc->cur++ = len >> 16; |
273 |
*enc->cur++ = len >> 8; |
274 |
*enc->cur++ = len; |
275 |
} |
276 |
} |
277 |
|
278 |
ecb_inline void |
279 |
encode_tag (enc_t *enc, UV tag) |
280 |
{ |
281 |
encode_uint (enc, MAJOR_TAG, tag); |
282 |
} |
283 |
|
284 |
// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded |
285 |
ecb_noinline static void |
286 |
encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len) |
287 |
{ |
288 |
STRLEN ulen = len; |
289 |
U8 *p, *pend = (U8 *)str + len; |
290 |
|
291 |
for (p = (U8 *)str; p < pend; ++p) |
292 |
ulen += *p >> 7; // count set high bits |
293 |
|
294 |
encode_uint (enc, MAJOR_TEXT, ulen); |
295 |
|
296 |
need (enc, ulen); |
297 |
for (p = (U8 *)str; p < pend; ++p) |
298 |
if (*p < 0x80) |
299 |
*enc->cur++ = *p; |
300 |
else |
301 |
{ |
302 |
*enc->cur++ = 0xc0 + (*p >> 6); |
303 |
*enc->cur++ = 0x80 + (*p & 63); |
304 |
} |
305 |
} |
306 |
|
307 |
ecb_inline void |
308 |
encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len) |
309 |
{ |
310 |
if (ecb_expect_false (upgrade_utf8)) |
311 |
if (!utf8) |
312 |
{ |
313 |
encode_str_utf8 (enc, utf8, str, len); |
314 |
return; |
315 |
} |
316 |
|
317 |
encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len); |
318 |
need (enc, len); |
319 |
memcpy (enc->cur, str, len); |
320 |
enc->cur += len; |
321 |
} |
322 |
|
323 |
ecb_inline void |
324 |
encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len) |
325 |
{ |
326 |
if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS)) |
327 |
{ |
328 |
SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1); |
329 |
|
330 |
if (SvOK (*svp)) |
331 |
{ |
332 |
// already registered, use stringref |
333 |
encode_tag (enc, CBOR_TAG_STRINGREF); |
334 |
encode_uint (enc, MAJOR_POS_INT, SvUV (*svp)); |
335 |
return; |
336 |
} |
337 |
else if (len >= minimum_string_length (enc->stringref_idx)) |
338 |
{ |
339 |
// register only |
340 |
sv_setuv (*svp, enc->stringref_idx); |
341 |
++enc->stringref_idx; |
342 |
} |
343 |
} |
344 |
|
345 |
encode_str (enc, upgrade_utf8, utf8, str, len); |
346 |
} |
347 |
|
348 |
static void encode_sv (enc_t *enc, SV *sv); |
349 |
|
350 |
static void |
351 |
encode_av (enc_t *enc, AV *av) |
352 |
{ |
353 |
int i, len = av_len (av); |
354 |
|
355 |
if (enc->depth >= enc->cbor.max_depth) |
356 |
croak (ERR_NESTING_EXCEEDED); |
357 |
|
358 |
++enc->depth; |
359 |
|
360 |
encode_uint (enc, MAJOR_ARRAY, len + 1); |
361 |
|
362 |
if (SvMAGICAL (av)) |
363 |
for (i = 0; i <= len; ++i) |
364 |
{ |
365 |
SV **svp = av_fetch (av, i, 0); |
366 |
encode_sv (enc, svp ? *svp : &PL_sv_undef); |
367 |
} |
368 |
else |
369 |
for (i = 0; i <= len; ++i) |
370 |
{ |
371 |
SV *sv = AvARRAY (av)[i]; |
372 |
encode_sv (enc, sv ? sv : &PL_sv_undef); |
373 |
} |
374 |
|
375 |
--enc->depth; |
376 |
} |
377 |
|
378 |
static void |
379 |
encode_hv (enc_t *enc, HV *hv) |
380 |
{ |
381 |
HE *he; |
382 |
|
383 |
if (enc->depth >= enc->cbor.max_depth) |
384 |
croak (ERR_NESTING_EXCEEDED); |
385 |
|
386 |
++enc->depth; |
387 |
|
388 |
int pairs = hv_iterinit (hv); |
389 |
int mg = SvMAGICAL (hv); |
390 |
|
391 |
if (mg) |
392 |
encode_ch (enc, MAJOR_MAP | MINOR_INDEF); |
393 |
else |
394 |
encode_uint (enc, MAJOR_MAP, pairs); |
395 |
|
396 |
while ((he = hv_iternext (hv))) |
397 |
{ |
398 |
if (HeKLEN (he) == HEf_SVKEY) |
399 |
encode_sv (enc, HeSVKEY (he)); |
400 |
else |
401 |
encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he)); |
402 |
|
403 |
encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he)); |
404 |
} |
405 |
|
406 |
if (mg) |
407 |
encode_ch (enc, MAJOR_MISC | MINOR_INDEF); |
408 |
|
409 |
--enc->depth; |
410 |
} |
411 |
|
412 |
// encode objects, arrays and special \0=false and \1=true values. |
413 |
static void |
414 |
encode_rv (enc_t *enc, SV *sv) |
415 |
{ |
416 |
SvGETMAGIC (sv); |
417 |
|
418 |
svtype svt = SvTYPE (sv); |
419 |
|
420 |
if (ecb_expect_false (SvOBJECT (sv))) |
421 |
{ |
422 |
HV *boolean_stash = !CBOR_SLOW || types_boolean_stash |
423 |
? types_boolean_stash |
424 |
: gv_stashpv ("Types::Serialiser::Boolean", 1); |
425 |
HV *error_stash = !CBOR_SLOW || types_error_stash |
426 |
? types_error_stash |
427 |
: gv_stashpv ("Types::Serialiser::Error", 1); |
428 |
HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash |
429 |
? cbor_tagged_stash |
430 |
: gv_stashpv ("CBOR::XS::Tagged" , 1); |
431 |
|
432 |
HV *stash = SvSTASH (sv); |
433 |
|
434 |
if (stash == boolean_stash) |
435 |
{ |
436 |
encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE); |
437 |
return; |
438 |
} |
439 |
else if (stash == error_stash) |
440 |
{ |
441 |
encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF); |
442 |
return; |
443 |
} |
444 |
else if (stash == tagged_stash) |
445 |
{ |
446 |
if (svt != SVt_PVAV) |
447 |
croak ("encountered CBOR::XS::Tagged object that isn't an array"); |
448 |
|
449 |
encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1))); |
450 |
encode_sv (enc, *av_fetch ((AV *)sv, 1, 1)); |
451 |
|
452 |
return; |
453 |
} |
454 |
} |
455 |
|
456 |
if (ecb_expect_false (SvREFCNT (sv) > 1) |
457 |
&& ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING)) |
458 |
{ |
459 |
if (!enc->shareable) |
460 |
enc->shareable = (HV *)sv_2mortal ((SV *)newHV ()); |
461 |
|
462 |
SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1); |
463 |
|
464 |
if (SvOK (*svp)) |
465 |
{ |
466 |
encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF); |
467 |
encode_uint (enc, MAJOR_POS_INT, SvUV (*svp)); |
468 |
return; |
469 |
} |
470 |
else |
471 |
{ |
472 |
sv_setuv (*svp, enc->shareable_idx); |
473 |
++enc->shareable_idx; |
474 |
encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE); |
475 |
} |
476 |
} |
477 |
|
478 |
if (ecb_expect_false (SvOBJECT (sv))) |
479 |
{ |
480 |
HV *stash = SvSTASH (sv); |
481 |
GV *method; |
482 |
|
483 |
if (enc->cbor.flags & F_FORBID_OBJECTS) |
484 |
croak ("encountered object '%s', but forbid_objects is enabled", |
485 |
SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
486 |
else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0))) |
487 |
{ |
488 |
dSP; |
489 |
|
490 |
ENTER; SAVETMPS; |
491 |
PUSHMARK (SP); |
492 |
// we re-bless the reference to get overload and other niceties right |
493 |
XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash)); |
494 |
|
495 |
PUTBACK; |
496 |
// G_SCALAR ensures that return value is 1 |
497 |
call_sv ((SV *)GvCV (method), G_SCALAR); |
498 |
SPAGAIN; |
499 |
|
500 |
// catch this surprisingly common error |
501 |
if (SvROK (TOPs) && SvRV (TOPs) == sv) |
502 |
croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash)); |
503 |
|
504 |
encode_sv (enc, POPs); |
505 |
|
506 |
PUTBACK; |
507 |
|
508 |
FREETMPS; LEAVE; |
509 |
} |
510 |
else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0) |
511 |
{ |
512 |
dSP; |
513 |
|
514 |
ENTER; SAVETMPS; |
515 |
SAVESTACK_POS (); |
516 |
PUSHMARK (SP); |
517 |
EXTEND (SP, 2); |
518 |
// we re-bless the reference to get overload and other niceties right |
519 |
PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash)); |
520 |
PUSHs (sv_cbor); |
521 |
|
522 |
PUTBACK; |
523 |
int count = call_sv ((SV *)GvCV (method), G_ARRAY); |
524 |
SPAGAIN; |
525 |
|
526 |
// catch this surprisingly common error |
527 |
if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv) |
528 |
croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash)); |
529 |
|
530 |
encode_tag (enc, CBOR_TAG_PERL_OBJECT); |
531 |
encode_uint (enc, MAJOR_ARRAY, count + 1); |
532 |
encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash)); |
533 |
|
534 |
while (count) |
535 |
encode_sv (enc, SP[1 - count--]); |
536 |
|
537 |
PUTBACK; |
538 |
|
539 |
FREETMPS; LEAVE; |
540 |
} |
541 |
else |
542 |
croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it", |
543 |
SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
544 |
} |
545 |
else if (svt == SVt_PVHV) |
546 |
encode_hv (enc, (HV *)sv); |
547 |
else if (svt == SVt_PVAV) |
548 |
encode_av (enc, (AV *)sv); |
549 |
else |
550 |
{ |
551 |
encode_tag (enc, CBOR_TAG_INDIRECTION); |
552 |
encode_sv (enc, sv); |
553 |
} |
554 |
} |
555 |
|
556 |
static void |
557 |
encode_nv (enc_t *enc, SV *sv) |
558 |
{ |
559 |
double nv = SvNVX (sv); |
560 |
|
561 |
need (enc, 9); |
562 |
|
563 |
if (ecb_expect_false (nv == (NV)(U32)nv)) |
564 |
encode_uint (enc, MAJOR_POS_INT, (U32)nv); |
565 |
//TODO: maybe I32? |
566 |
else if (ecb_expect_false (nv == (float)nv)) |
567 |
{ |
568 |
uint32_t fp = ecb_float_to_binary32 (nv); |
569 |
|
570 |
*enc->cur++ = MAJOR_MISC | MISC_FLOAT32; |
571 |
|
572 |
if (!ecb_big_endian ()) |
573 |
fp = ecb_bswap32 (fp); |
574 |
|
575 |
memcpy (enc->cur, &fp, 4); |
576 |
enc->cur += 4; |
577 |
} |
578 |
else |
579 |
{ |
580 |
uint64_t fp = ecb_double_to_binary64 (nv); |
581 |
|
582 |
*enc->cur++ = MAJOR_MISC | MISC_FLOAT64; |
583 |
|
584 |
if (!ecb_big_endian ()) |
585 |
fp = ecb_bswap64 (fp); |
586 |
|
587 |
memcpy (enc->cur, &fp, 8); |
588 |
enc->cur += 8; |
589 |
} |
590 |
} |
591 |
|
592 |
static void |
593 |
encode_sv (enc_t *enc, SV *sv) |
594 |
{ |
595 |
SvGETMAGIC (sv); |
596 |
|
597 |
if (SvPOKp (sv)) |
598 |
{ |
599 |
STRLEN len; |
600 |
char *str = SvPV (sv, len); |
601 |
encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len); |
602 |
} |
603 |
else if (SvNOKp (sv)) |
604 |
encode_nv (enc, sv); |
605 |
else if (SvIOKp (sv)) |
606 |
{ |
607 |
if (SvIsUV (sv)) |
608 |
encode_uint (enc, MAJOR_POS_INT, SvUVX (sv)); |
609 |
else if (SvIVX (sv) >= 0) |
610 |
encode_uint (enc, MAJOR_POS_INT, SvIVX (sv)); |
611 |
else |
612 |
encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1)); |
613 |
} |
614 |
else if (SvROK (sv)) |
615 |
encode_rv (enc, SvRV (sv)); |
616 |
else if (!SvOK (sv)) |
617 |
encode_ch (enc, MAJOR_MISC | SIMPLE_NULL); |
618 |
else if (enc->cbor.flags & F_ALLOW_UNKNOWN) |
619 |
encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF); |
620 |
else |
621 |
croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data", |
622 |
SvPV_nolen (sv), (unsigned int)SvFLAGS (sv)); |
623 |
} |
624 |
|
625 |
static SV * |
626 |
encode_cbor (SV *scalar, CBOR *cbor) |
627 |
{ |
628 |
enc_t enc = { 0 }; |
629 |
|
630 |
enc.cbor = *cbor; |
631 |
enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); |
632 |
enc.cur = SvPVX (enc.sv); |
633 |
enc.end = SvEND (enc.sv); |
634 |
|
635 |
SvPOK_only (enc.sv); |
636 |
|
637 |
if (cbor->flags & F_PACK_STRINGS) |
638 |
{ |
639 |
encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE); |
640 |
enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ()); |
641 |
enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ()); |
642 |
} |
643 |
|
644 |
encode_sv (&enc, scalar); |
645 |
|
646 |
SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); |
647 |
*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings |
648 |
|
649 |
if (enc.cbor.flags & F_SHRINK) |
650 |
shrink (enc.sv); |
651 |
|
652 |
return enc.sv; |
653 |
} |
654 |
|
655 |
///////////////////////////////////////////////////////////////////////////// |
656 |
// decoder |
657 |
|
658 |
// structure used for decoding CBOR |
659 |
typedef struct |
660 |
{ |
661 |
U8 *cur; // current parser pointer |
662 |
U8 *end; // end of input string |
663 |
const char *err; // parse error, if != 0 |
664 |
CBOR cbor; |
665 |
U32 depth; // recursion depth |
666 |
U32 maxdepth; // recursion depth limit |
667 |
AV *shareable; |
668 |
AV *stringref; |
669 |
SV *decode_tagged; |
670 |
SV *err_sv; // optional sv for error, needs to be freed |
671 |
} dec_t; |
672 |
|
673 |
// set dec->err to ERRSV |
674 |
ecb_cold static void |
675 |
err_errsv (dec_t *dec) |
676 |
{ |
677 |
if (!dec->err) |
678 |
{ |
679 |
dec->err_sv = newSVsv (ERRSV); |
680 |
|
681 |
// chop off the trailing \n |
682 |
SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1); |
683 |
*SvEND (dec->err_sv) = 0; |
684 |
|
685 |
dec->err = SvPVutf8_nolen (dec->err_sv); |
686 |
} |
687 |
} |
688 |
|
689 |
// the following functions are used to reduce code size and help the compiler to optimise |
690 |
ecb_cold static void |
691 |
err_set (dec_t *dec, const char *reason) |
692 |
{ |
693 |
if (!dec->err) |
694 |
dec->err = reason; |
695 |
} |
696 |
|
697 |
ecb_cold static void |
698 |
err_unexpected_end (dec_t *dec) |
699 |
{ |
700 |
err_set (dec, "unexpected end of CBOR data"); |
701 |
} |
702 |
|
703 |
ecb_cold static void |
704 |
err_nesting_exceeded (dec_t *dec) |
705 |
{ |
706 |
err_set (dec, ERR_NESTING_EXCEEDED); |
707 |
} |
708 |
|
709 |
#define ERR_DO(do) SB do; goto fail; SE |
710 |
#define ERR(reason) ERR_DO (err_set (dec, reason)) |
711 |
#define ERR_ERRSV ERR_DO (err_errsv (dec)) |
712 |
|
713 |
#define WANT(len) if (ecb_expect_false ((UV)(dec->end - dec->cur) < (UV)len)) ERR_DO (err_unexpected_end (dec)) |
714 |
|
715 |
#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED) |
716 |
#define DEC_DEC_DEPTH --dec->depth |
717 |
|
718 |
static UV |
719 |
decode_uint (dec_t *dec) |
720 |
{ |
721 |
U8 m = *dec->cur & MINOR_MASK; |
722 |
++dec->cur; |
723 |
|
724 |
if (ecb_expect_true (m < LENGTH_EXT1)) |
725 |
return m; |
726 |
else if (ecb_expect_true (m == LENGTH_EXT1)) |
727 |
{ |
728 |
WANT (1); |
729 |
dec->cur += 1; |
730 |
return dec->cur[-1]; |
731 |
} |
732 |
else if (ecb_expect_true (m == LENGTH_EXT2)) |
733 |
{ |
734 |
WANT (2); |
735 |
dec->cur += 2; |
736 |
return (((UV)dec->cur[-2]) << 8) |
737 |
| ((UV)dec->cur[-1]); |
738 |
} |
739 |
else if (ecb_expect_true (m == LENGTH_EXT4)) |
740 |
{ |
741 |
WANT (4); |
742 |
dec->cur += 4; |
743 |
return (((UV)dec->cur[-4]) << 24) |
744 |
| (((UV)dec->cur[-3]) << 16) |
745 |
| (((UV)dec->cur[-2]) << 8) |
746 |
| ((UV)dec->cur[-1]); |
747 |
} |
748 |
else if (ecb_expect_true (m == LENGTH_EXT8)) |
749 |
{ |
750 |
WANT (8); |
751 |
dec->cur += 8; |
752 |
|
753 |
return |
754 |
#if UVSIZE < 8 |
755 |
0 |
756 |
#else |
757 |
(((UV)dec->cur[-8]) << 56) |
758 |
| (((UV)dec->cur[-7]) << 48) |
759 |
| (((UV)dec->cur[-6]) << 40) |
760 |
| (((UV)dec->cur[-5]) << 32) |
761 |
#endif |
762 |
| (((UV)dec->cur[-4]) << 24) |
763 |
| (((UV)dec->cur[-3]) << 16) |
764 |
| (((UV)dec->cur[-2]) << 8) |
765 |
| ((UV)dec->cur[-1]); |
766 |
} |
767 |
else |
768 |
ERR ("corrupted CBOR data (unsupported integer minor encoding)"); |
769 |
|
770 |
fail: |
771 |
return 0; |
772 |
} |
773 |
|
774 |
static SV *decode_sv (dec_t *dec); |
775 |
|
776 |
static SV * |
777 |
decode_av (dec_t *dec) |
778 |
{ |
779 |
AV *av = newAV (); |
780 |
|
781 |
DEC_INC_DEPTH; |
782 |
|
783 |
if (*dec->cur == (MAJOR_ARRAY | MINOR_INDEF)) |
784 |
{ |
785 |
++dec->cur; |
786 |
|
787 |
for (;;) |
788 |
{ |
789 |
WANT (1); |
790 |
|
791 |
if (*dec->cur == (MAJOR_MISC | MINOR_INDEF)) |
792 |
{ |
793 |
++dec->cur; |
794 |
break; |
795 |
} |
796 |
|
797 |
av_push (av, decode_sv (dec)); |
798 |
} |
799 |
} |
800 |
else |
801 |
{ |
802 |
UV i, len = decode_uint (dec); |
803 |
|
804 |
WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays |
805 |
av_fill (av, len - 1); |
806 |
|
807 |
for (i = 0; i < len; ++i) |
808 |
AvARRAY (av)[i] = decode_sv (dec); |
809 |
} |
810 |
|
811 |
DEC_DEC_DEPTH; |
812 |
return newRV_noinc ((SV *)av); |
813 |
|
814 |
fail: |
815 |
SvREFCNT_dec (av); |
816 |
DEC_DEC_DEPTH; |
817 |
return &PL_sv_undef; |
818 |
} |
819 |
|
820 |
static void |
821 |
decode_he (dec_t *dec, HV *hv) |
822 |
{ |
823 |
// for speed reasons, we specialcase single-string |
824 |
// byte or utf-8 strings as keys, but only when !stringref |
825 |
|
826 |
if (ecb_expect_true (!dec->stringref)) |
827 |
if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8)) |
828 |
{ |
829 |
STRLEN len = decode_uint (dec); |
830 |
char *key = (char *)dec->cur; |
831 |
|
832 |
WANT (len); |
833 |
dec->cur += len; |
834 |
|
835 |
hv_store (hv, key, len, decode_sv (dec), 0); |
836 |
|
837 |
return; |
838 |
} |
839 |
else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8)) |
840 |
{ |
841 |
STRLEN len = decode_uint (dec); |
842 |
char *key = (char *)dec->cur; |
843 |
|
844 |
WANT (len); |
845 |
dec->cur += len; |
846 |
|
847 |
if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8)) |
848 |
if (!is_utf8_string (key, len)) |
849 |
ERR ("corrupted CBOR data (invalid UTF-8 in map key)"); |
850 |
|
851 |
hv_store (hv, key, -len, decode_sv (dec), 0); |
852 |
|
853 |
return; |
854 |
} |
855 |
|
856 |
SV *k = decode_sv (dec); |
857 |
SV *v = decode_sv (dec); |
858 |
|
859 |
// we leak memory if uncaught exceptions are thrown by random magical |
860 |
// methods, and this is hopefully the only place where it can happen, |
861 |
// so if there is a chance of an exception, take the very slow path. |
862 |
// since catching exceptions is "undocumented/internal/forbidden" by |
863 |
// the new p5p powers, we need to call out to a perl function :/ |
864 |
if (ecb_expect_false (SvAMAGIC (k))) |
865 |
{ |
866 |
dSP; |
867 |
|
868 |
ENTER; SAVETMPS; |
869 |
PUSHMARK (SP); |
870 |
EXTEND (SP, 3); |
871 |
PUSHs (sv_2mortal (newRV_inc ((SV *)hv))); |
872 |
PUSHs (sv_2mortal (k)); |
873 |
PUSHs (sv_2mortal (v)); |
874 |
|
875 |
PUTBACK; |
876 |
call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL); |
877 |
SPAGAIN; |
878 |
|
879 |
FREETMPS; LEAVE; |
880 |
|
881 |
if (SvTRUE (ERRSV)) |
882 |
ERR_ERRSV; |
883 |
|
884 |
return; |
885 |
} |
886 |
|
887 |
hv_store_ent (hv, k, v, 0); |
888 |
SvREFCNT_dec (k); |
889 |
|
890 |
fail: |
891 |
; |
892 |
} |
893 |
|
894 |
static SV * |
895 |
decode_hv (dec_t *dec) |
896 |
{ |
897 |
HV *hv = newHV (); |
898 |
|
899 |
DEC_INC_DEPTH; |
900 |
|
901 |
if (*dec->cur == (MAJOR_MAP | MINOR_INDEF)) |
902 |
{ |
903 |
++dec->cur; |
904 |
|
905 |
for (;;) |
906 |
{ |
907 |
WANT (1); |
908 |
|
909 |
if (*dec->cur == (MAJOR_MISC | MINOR_INDEF)) |
910 |
{ |
911 |
++dec->cur; |
912 |
break; |
913 |
} |
914 |
|
915 |
decode_he (dec, hv); |
916 |
} |
917 |
} |
918 |
else |
919 |
{ |
920 |
UV pairs = decode_uint (dec); |
921 |
|
922 |
WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes |
923 |
|
924 |
while (pairs--) |
925 |
decode_he (dec, hv); |
926 |
} |
927 |
|
928 |
DEC_DEC_DEPTH; |
929 |
return newRV_noinc ((SV *)hv); |
930 |
|
931 |
fail: |
932 |
SvREFCNT_dec (hv); |
933 |
DEC_DEC_DEPTH; |
934 |
return &PL_sv_undef; |
935 |
} |
936 |
|
937 |
static SV * |
938 |
decode_str (dec_t *dec, int utf8) |
939 |
{ |
940 |
SV *sv = 0; |
941 |
|
942 |
if ((*dec->cur & MINOR_MASK) == MINOR_INDEF) |
943 |
{ |
944 |
// indefinite length strings |
945 |
++dec->cur; |
946 |
|
947 |
U8 major = *dec->cur & MAJOR_MISC; |
948 |
|
949 |
sv = newSVpvn ("", 0); |
950 |
|
951 |
for (;;) |
952 |
{ |
953 |
WANT (1); |
954 |
|
955 |
if ((*dec->cur - major) > LENGTH_EXT8) |
956 |
if (*dec->cur == (MAJOR_MISC | MINOR_INDEF)) |
957 |
{ |
958 |
++dec->cur; |
959 |
break; |
960 |
} |
961 |
else |
962 |
ERR ("corrupted CBOR data (invalid chunks in indefinite length string)"); |
963 |
|
964 |
STRLEN len = decode_uint (dec); |
965 |
|
966 |
WANT (len); |
967 |
sv_catpvn (sv, dec->cur, len); |
968 |
dec->cur += len; |
969 |
} |
970 |
} |
971 |
else |
972 |
{ |
973 |
STRLEN len = decode_uint (dec); |
974 |
|
975 |
WANT (len); |
976 |
sv = newSVpvn (dec->cur, len); |
977 |
dec->cur += len; |
978 |
|
979 |
if (ecb_expect_false (dec->stringref) |
980 |
&& SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1)) |
981 |
av_push (dec->stringref, SvREFCNT_inc_NN (sv)); |
982 |
} |
983 |
|
984 |
if (utf8) |
985 |
{ |
986 |
if (ecb_expect_false (dec->cbor.flags & F_VALIDATE_UTF8)) |
987 |
if (!is_utf8_string (SvPVX (sv), SvCUR (sv))) |
988 |
ERR ("corrupted CBOR data (invalid UTF-8 in text string)"); |
989 |
|
990 |
SvUTF8_on (sv); |
991 |
} |
992 |
|
993 |
return sv; |
994 |
|
995 |
fail: |
996 |
SvREFCNT_dec (sv); |
997 |
return &PL_sv_undef; |
998 |
} |
999 |
|
1000 |
static SV * |
1001 |
decode_tagged (dec_t *dec) |
1002 |
{ |
1003 |
SV *sv = 0; |
1004 |
UV tag = decode_uint (dec); |
1005 |
|
1006 |
WANT (1); |
1007 |
|
1008 |
switch (tag) |
1009 |
{ |
1010 |
case CBOR_TAG_MAGIC: |
1011 |
sv = decode_sv (dec); |
1012 |
break; |
1013 |
|
1014 |
case CBOR_TAG_INDIRECTION: |
1015 |
sv = newRV_noinc (decode_sv (dec)); |
1016 |
break; |
1017 |
|
1018 |
case CBOR_TAG_STRINGREF_NAMESPACE: |
1019 |
{ |
1020 |
// do nmot use SAVETMPS/FREETMPS, as these will |
1021 |
// erase mortalised caches, e.g. "shareable" |
1022 |
ENTER; |
1023 |
|
1024 |
SAVESPTR (dec->stringref); |
1025 |
dec->stringref = (AV *)sv_2mortal ((SV *)newAV ()); |
1026 |
|
1027 |
sv = decode_sv (dec); |
1028 |
|
1029 |
LEAVE; |
1030 |
} |
1031 |
break; |
1032 |
|
1033 |
case CBOR_TAG_STRINGREF: |
1034 |
{ |
1035 |
if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT)) |
1036 |
ERR ("corrupted CBOR data (stringref index not an unsigned integer)"); |
1037 |
|
1038 |
UV idx = decode_uint (dec); |
1039 |
|
1040 |
if (!dec->stringref || (int)idx > AvFILLp (dec->stringref)) |
1041 |
ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)"); |
1042 |
|
1043 |
sv = newSVsv (AvARRAY (dec->stringref)[idx]); |
1044 |
} |
1045 |
break; |
1046 |
|
1047 |
case CBOR_TAG_VALUE_SHAREABLE: |
1048 |
{ |
1049 |
if (ecb_expect_false (!dec->shareable)) |
1050 |
dec->shareable = (AV *)sv_2mortal ((SV *)newAV ()); |
1051 |
|
1052 |
if (dec->cbor.flags & F_ALLOW_CYCLES) |
1053 |
{ |
1054 |
sv = newSV (0); |
1055 |
av_push (dec->shareable, SvREFCNT_inc_NN (sv)); |
1056 |
|
1057 |
SV *osv = decode_sv (dec); |
1058 |
sv_setsv (sv, osv); |
1059 |
SvREFCNT_dec_NN (osv); |
1060 |
} |
1061 |
else |
1062 |
{ |
1063 |
av_push (dec->shareable, &PL_sv_undef); |
1064 |
int idx = AvFILLp (dec->shareable); |
1065 |
sv = decode_sv (dec); |
1066 |
av_store (dec->shareable, idx, SvREFCNT_inc_NN (sv)); |
1067 |
} |
1068 |
} |
1069 |
break; |
1070 |
|
1071 |
case CBOR_TAG_VALUE_SHAREDREF: |
1072 |
{ |
1073 |
if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT)) |
1074 |
ERR ("corrupted CBOR data (sharedref index not an unsigned integer)"); |
1075 |
|
1076 |
UV idx = decode_uint (dec); |
1077 |
|
1078 |
if (!dec->shareable || (int)idx > AvFILLp (dec->shareable)) |
1079 |
ERR ("corrupted CBOR data (sharedref index out of bounds)"); |
1080 |
|
1081 |
sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]); |
1082 |
|
1083 |
if (sv == &PL_sv_undef) |
1084 |
ERR ("cyclic CBOR data structure found, but allow_cycles is not enabled"); |
1085 |
} |
1086 |
break; |
1087 |
|
1088 |
case CBOR_TAG_PERL_OBJECT: |
1089 |
{ |
1090 |
if (dec->cbor.flags & F_FORBID_OBJECTS) |
1091 |
goto filter; |
1092 |
|
1093 |
sv = decode_sv (dec); |
1094 |
|
1095 |
if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV) |
1096 |
ERR ("corrupted CBOR data (non-array perl object)"); |
1097 |
|
1098 |
AV *av = (AV *)SvRV (sv); |
1099 |
int len = av_len (av) + 1; |
1100 |
HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0); |
1101 |
|
1102 |
if (!stash) |
1103 |
ERR ("cannot decode perl-object (package does not exist)"); |
1104 |
|
1105 |
GV *method = gv_fetchmethod_autoload (stash, "THAW", 0); |
1106 |
|
1107 |
if (!method) |
1108 |
ERR ("cannot decode perl-object (package does not have a THAW method)"); |
1109 |
|
1110 |
dSP; |
1111 |
|
1112 |
ENTER; SAVETMPS; |
1113 |
PUSHMARK (SP); |
1114 |
EXTEND (SP, len + 1); |
1115 |
// we re-bless the reference to get overload and other niceties right |
1116 |
PUSHs (*av_fetch (av, 0, 1)); |
1117 |
PUSHs (sv_cbor); |
1118 |
|
1119 |
int i; |
1120 |
|
1121 |
for (i = 1; i < len; ++i) |
1122 |
PUSHs (*av_fetch (av, i, 1)); |
1123 |
|
1124 |
PUTBACK; |
1125 |
call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL); |
1126 |
SPAGAIN; |
1127 |
|
1128 |
if (SvTRUE (ERRSV)) |
1129 |
{ |
1130 |
FREETMPS; LEAVE; |
1131 |
ERR_ERRSV; |
1132 |
} |
1133 |
|
1134 |
SvREFCNT_dec (sv); |
1135 |
sv = SvREFCNT_inc (POPs); |
1136 |
|
1137 |
PUTBACK; |
1138 |
|
1139 |
FREETMPS; LEAVE; |
1140 |
} |
1141 |
break; |
1142 |
|
1143 |
default: |
1144 |
filter: |
1145 |
{ |
1146 |
SV *tag_sv = newSVuv (tag); |
1147 |
|
1148 |
sv = decode_sv (dec); |
1149 |
|
1150 |
dSP; |
1151 |
ENTER; SAVETMPS; |
1152 |
SAVESTACK_POS (); |
1153 |
PUSHMARK (SP); |
1154 |
EXTEND (SP, 2); |
1155 |
PUSHs (tag_sv); |
1156 |
PUSHs (sv); |
1157 |
|
1158 |
PUTBACK; |
1159 |
int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL); |
1160 |
SPAGAIN; |
1161 |
|
1162 |
if (SvTRUE (ERRSV)) |
1163 |
{ |
1164 |
SvREFCNT_dec (tag_sv); |
1165 |
FREETMPS; LEAVE; |
1166 |
ERR_ERRSV; |
1167 |
} |
1168 |
|
1169 |
if (count) |
1170 |
{ |
1171 |
SvREFCNT_dec (tag_sv); |
1172 |
SvREFCNT_dec (sv); |
1173 |
sv = SvREFCNT_inc (POPs); |
1174 |
} |
1175 |
else |
1176 |
{ |
1177 |
AV *av = newAV (); |
1178 |
av_push (av, tag_sv); |
1179 |
av_push (av, sv); |
1180 |
|
1181 |
HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash |
1182 |
? cbor_tagged_stash |
1183 |
: gv_stashpv ("CBOR::XS::Tagged" , 1); |
1184 |
sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash); |
1185 |
} |
1186 |
|
1187 |
PUTBACK; |
1188 |
|
1189 |
FREETMPS; LEAVE; |
1190 |
} |
1191 |
break; |
1192 |
} |
1193 |
|
1194 |
return sv; |
1195 |
|
1196 |
fail: |
1197 |
SvREFCNT_dec (sv); |
1198 |
return &PL_sv_undef; |
1199 |
} |
1200 |
|
1201 |
static SV * |
1202 |
decode_sv (dec_t *dec) |
1203 |
{ |
1204 |
WANT (1); |
1205 |
|
1206 |
switch (*dec->cur >> MAJOR_SHIFT) |
1207 |
{ |
1208 |
case MAJOR_POS_INT >> MAJOR_SHIFT: return newSVuv (decode_uint (dec)); |
1209 |
case MAJOR_NEG_INT >> MAJOR_SHIFT: return newSViv (-1 - (IV)decode_uint (dec)); |
1210 |
case MAJOR_BYTES >> MAJOR_SHIFT: return decode_str (dec, 0); |
1211 |
case MAJOR_TEXT >> MAJOR_SHIFT: return decode_str (dec, 1); |
1212 |
case MAJOR_ARRAY >> MAJOR_SHIFT: return decode_av (dec); |
1213 |
case MAJOR_MAP >> MAJOR_SHIFT: return decode_hv (dec); |
1214 |
case MAJOR_TAG >> MAJOR_SHIFT: return decode_tagged (dec); |
1215 |
|
1216 |
case MAJOR_MISC >> MAJOR_SHIFT: |
1217 |
switch (*dec->cur++ & MINOR_MASK) |
1218 |
{ |
1219 |
case SIMPLE_FALSE: |
1220 |
#if CBOR_SLOW |
1221 |
types_false = get_bool ("Types::Serialiser::false"); |
1222 |
#endif |
1223 |
return newSVsv (types_false); |
1224 |
case SIMPLE_TRUE: |
1225 |
#if CBOR_SLOW |
1226 |
types_true = get_bool ("Types::Serialiser::true"); |
1227 |
#endif |
1228 |
return newSVsv (types_true); |
1229 |
case SIMPLE_NULL: |
1230 |
return newSVsv (&PL_sv_undef); |
1231 |
case SIMPLE_UNDEF: |
1232 |
#if CBOR_SLOW |
1233 |
types_error = get_bool ("Types::Serialiser::error"); |
1234 |
#endif |
1235 |
return newSVsv (types_error); |
1236 |
|
1237 |
case MISC_FLOAT16: |
1238 |
{ |
1239 |
WANT (2); |
1240 |
|
1241 |
uint16_t fp = (dec->cur[0] << 8) | dec->cur[1]; |
1242 |
dec->cur += 2; |
1243 |
|
1244 |
return newSVnv (ecb_binary16_to_float (fp)); |
1245 |
} |
1246 |
|
1247 |
case MISC_FLOAT32: |
1248 |
{ |
1249 |
uint32_t fp; |
1250 |
WANT (4); |
1251 |
memcpy (&fp, dec->cur, 4); |
1252 |
dec->cur += 4; |
1253 |
|
1254 |
if (!ecb_big_endian ()) |
1255 |
fp = ecb_bswap32 (fp); |
1256 |
|
1257 |
return newSVnv (ecb_binary32_to_float (fp)); |
1258 |
} |
1259 |
|
1260 |
case MISC_FLOAT64: |
1261 |
{ |
1262 |
uint64_t fp; |
1263 |
WANT (8); |
1264 |
memcpy (&fp, dec->cur, 8); |
1265 |
dec->cur += 8; |
1266 |
|
1267 |
if (!ecb_big_endian ()) |
1268 |
fp = ecb_bswap64 (fp); |
1269 |
|
1270 |
return newSVnv (ecb_binary64_to_double (fp)); |
1271 |
} |
1272 |
|
1273 |
// 0..19 unassigned simple |
1274 |
// 24 reserved + unassigned simple (reserved values are not encodable) |
1275 |
// 28-30 unassigned misc |
1276 |
// 31 break code |
1277 |
default: |
1278 |
ERR ("corrupted CBOR data (reserved/unassigned/unexpected major 7 value)"); |
1279 |
} |
1280 |
|
1281 |
break; |
1282 |
} |
1283 |
|
1284 |
fail: |
1285 |
return &PL_sv_undef; |
1286 |
} |
1287 |
|
1288 |
static SV * |
1289 |
decode_cbor (SV *string, CBOR *cbor, char **offset_return) |
1290 |
{ |
1291 |
dec_t dec = { 0 }; |
1292 |
SV *sv; |
1293 |
STRLEN len; |
1294 |
char *data = SvPVbyte (string, len); |
1295 |
|
1296 |
if (len > cbor->max_size && cbor->max_size) |
1297 |
croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu", |
1298 |
(unsigned long)len, (unsigned long)cbor->max_size); |
1299 |
|
1300 |
dec.cbor = *cbor; |
1301 |
dec.cur = (U8 *)data; |
1302 |
dec.end = (U8 *)data + len; |
1303 |
|
1304 |
sv = decode_sv (&dec); |
1305 |
|
1306 |
if (offset_return) |
1307 |
*offset_return = dec.cur; |
1308 |
|
1309 |
if (!(offset_return || !sv)) |
1310 |
if (dec.cur != dec.end && !dec.err) |
1311 |
dec.err = "garbage after CBOR object"; |
1312 |
|
1313 |
if (dec.err) |
1314 |
{ |
1315 |
if (dec.shareable) |
1316 |
{ |
1317 |
// need to break cyclic links, which would all be in shareable |
1318 |
int i; |
1319 |
SV **svp; |
1320 |
|
1321 |
for (i = av_len (dec.shareable) + 1; i--; ) |
1322 |
if ((svp = av_fetch (dec.shareable, i, 0))) |
1323 |
sv_setsv (*svp, &PL_sv_undef); |
1324 |
} |
1325 |
|
1326 |
SvREFCNT_dec (sv); |
1327 |
|
1328 |
if (dec.err_sv) |
1329 |
sv_2mortal (dec.err_sv); |
1330 |
|
1331 |
croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur); |
1332 |
} |
1333 |
|
1334 |
sv = sv_2mortal (sv); |
1335 |
|
1336 |
return sv; |
1337 |
} |
1338 |
|
1339 |
///////////////////////////////////////////////////////////////////////////// |
1340 |
// incremental parser |
1341 |
|
1342 |
#define INCR_DONE(cbor) (AvFILLp (cbor->incr_count) < 0) |
1343 |
|
1344 |
// returns 0 for notyet, 1 for success or error |
1345 |
static int |
1346 |
incr_parse (CBOR *self, SV *cborstr) |
1347 |
{ |
1348 |
STRLEN cur; |
1349 |
SvPV (cborstr, cur); |
1350 |
|
1351 |
while (ecb_expect_true (self->incr_need <= cur)) |
1352 |
{ |
1353 |
// table of integer count bytes |
1354 |
static I8 incr_len[MINOR_MASK + 1] = { |
1355 |
0, 0, 0, 0, 0, 0, 0, 0, |
1356 |
0, 0, 0, 0, 0, 0, 0, 0, |
1357 |
0, 0, 0, 0, 0, 0, 0, 0, |
1358 |
1, 2, 4, 8,-1,-1,-1,-2 |
1359 |
}; |
1360 |
|
1361 |
const U8 *p = SvPVX (cborstr) + self->incr_pos; |
1362 |
U8 m = *p & MINOR_MASK; |
1363 |
IV count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]); |
1364 |
I8 ilen = incr_len[m]; |
1365 |
|
1366 |
self->incr_need = self->incr_pos + 1; |
1367 |
|
1368 |
if (ecb_expect_false (ilen < 0)) |
1369 |
{ |
1370 |
if (m != MINOR_INDEF) |
1371 |
return 1; // error |
1372 |
|
1373 |
if (*p == (MAJOR_MISC | MINOR_INDEF)) |
1374 |
{ |
1375 |
if (count >= 0) |
1376 |
return 1; // error |
1377 |
|
1378 |
count = 1; |
1379 |
} |
1380 |
else |
1381 |
{ |
1382 |
av_push (self->incr_count, newSViv (-1)); //TODO: nest |
1383 |
count = -1; |
1384 |
} |
1385 |
} |
1386 |
else |
1387 |
{ |
1388 |
self->incr_need += ilen; |
1389 |
if (ecb_expect_false (self->incr_need > cur)) |
1390 |
return 0; |
1391 |
|
1392 |
int major = *p >> MAJOR_SHIFT; |
1393 |
|
1394 |
switch (major) |
1395 |
{ |
1396 |
case MAJOR_TAG >> MAJOR_SHIFT: |
1397 |
++count; // tags merely prefix another value |
1398 |
break; |
1399 |
|
1400 |
case MAJOR_BYTES >> MAJOR_SHIFT: |
1401 |
case MAJOR_TEXT >> MAJOR_SHIFT: |
1402 |
case MAJOR_ARRAY >> MAJOR_SHIFT: |
1403 |
case MAJOR_MAP >> MAJOR_SHIFT: |
1404 |
{ |
1405 |
UV len; |
1406 |
|
1407 |
if (ecb_expect_false (ilen)) |
1408 |
{ |
1409 |
len = 0; |
1410 |
|
1411 |
do { |
1412 |
len = (len << 8) | *++p; |
1413 |
} while (--ilen); |
1414 |
} |
1415 |
else |
1416 |
len = m; |
1417 |
|
1418 |
switch (major) |
1419 |
{ |
1420 |
case MAJOR_BYTES >> MAJOR_SHIFT: |
1421 |
case MAJOR_TEXT >> MAJOR_SHIFT: |
1422 |
self->incr_need += len; |
1423 |
if (ecb_expect_false (self->incr_need > cur)) |
1424 |
return 0; |
1425 |
|
1426 |
break; |
1427 |
|
1428 |
case MAJOR_MAP >> MAJOR_SHIFT: |
1429 |
len <<= 1; |
1430 |
case MAJOR_ARRAY >> MAJOR_SHIFT: |
1431 |
if (len) |
1432 |
{ |
1433 |
av_push (self->incr_count, newSViv (len + 1)); //TODO: nest |
1434 |
count = len + 1; |
1435 |
} |
1436 |
break; |
1437 |
} |
1438 |
} |
1439 |
} |
1440 |
} |
1441 |
|
1442 |
self->incr_pos = self->incr_need; |
1443 |
|
1444 |
if (count > 0) |
1445 |
{ |
1446 |
while (!--count) |
1447 |
{ |
1448 |
if (!AvFILLp (self->incr_count)) |
1449 |
return 1; // done |
1450 |
|
1451 |
SvREFCNT_dec_NN (av_pop (self->incr_count)); |
1452 |
count = SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]); |
1453 |
} |
1454 |
|
1455 |
SvIVX (AvARRAY (self->incr_count)[AvFILLp (self->incr_count)]) = count; |
1456 |
} |
1457 |
} |
1458 |
|
1459 |
return 0; |
1460 |
} |
1461 |
|
1462 |
|
1463 |
///////////////////////////////////////////////////////////////////////////// |
1464 |
// XS interface functions |
1465 |
|
1466 |
MODULE = CBOR::XS PACKAGE = CBOR::XS |
1467 |
|
1468 |
BOOT: |
1469 |
{ |
1470 |
cbor_stash = gv_stashpv ("CBOR::XS" , 1); |
1471 |
cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1); |
1472 |
|
1473 |
types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1); |
1474 |
types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1); |
1475 |
|
1476 |
types_true = get_bool ("Types::Serialiser::true" ); |
1477 |
types_false = get_bool ("Types::Serialiser::false"); |
1478 |
types_error = get_bool ("Types::Serialiser::error"); |
1479 |
|
1480 |
default_filter = newSVpv ("CBOR::XS::default_filter", 0); |
1481 |
|
1482 |
sv_cbor = newSVpv ("CBOR", 0); |
1483 |
SvREADONLY_on (sv_cbor); |
1484 |
|
1485 |
assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1)); |
1486 |
} |
1487 |
|
1488 |
PROTOTYPES: DISABLE |
1489 |
|
1490 |
void CLONE (...) |
1491 |
CODE: |
1492 |
cbor_stash = 0; |
1493 |
cbor_tagged_stash = 0; |
1494 |
types_error_stash = 0; |
1495 |
types_boolean_stash = 0; |
1496 |
|
1497 |
void new (char *klass) |
1498 |
PPCODE: |
1499 |
{ |
1500 |
SV *pv = NEWSV (0, sizeof (CBOR)); |
1501 |
SvPOK_only (pv); |
1502 |
cbor_init ((CBOR *)SvPVX (pv)); |
1503 |
XPUSHs (sv_2mortal (sv_bless ( |
1504 |
newRV_noinc (pv), |
1505 |
strEQ (klass, "CBOR::XS") ? CBOR_STASH : gv_stashpv (klass, 1) |
1506 |
))); |
1507 |
} |
1508 |
|
1509 |
void shrink (CBOR *self, int enable = 1) |
1510 |
ALIAS: |
1511 |
shrink = F_SHRINK |
1512 |
allow_unknown = F_ALLOW_UNKNOWN |
1513 |
allow_sharing = F_ALLOW_SHARING |
1514 |
allow_cycles = F_ALLOW_CYCLES |
1515 |
forbid_objects = F_FORBID_OBJECTS |
1516 |
pack_strings = F_PACK_STRINGS |
1517 |
text_keys = F_TEXT_KEYS |
1518 |
text_strings = F_TEXT_STRINGS |
1519 |
validate_utf8 = F_VALIDATE_UTF8 |
1520 |
PPCODE: |
1521 |
{ |
1522 |
if (enable) |
1523 |
self->flags |= ix; |
1524 |
else |
1525 |
self->flags &= ~ix; |
1526 |
|
1527 |
XPUSHs (ST (0)); |
1528 |
} |
1529 |
|
1530 |
void get_shrink (CBOR *self) |
1531 |
ALIAS: |
1532 |
get_shrink = F_SHRINK |
1533 |
get_allow_unknown = F_ALLOW_UNKNOWN |
1534 |
get_allow_sharing = F_ALLOW_SHARING |
1535 |
get_allow_cycles = F_ALLOW_CYCLES |
1536 |
get_forbid_objects = F_FORBID_OBJECTS |
1537 |
get_pack_strings = F_PACK_STRINGS |
1538 |
get_text_keys = F_TEXT_KEYS |
1539 |
get_text_strings = F_TEXT_STRINGS |
1540 |
get_validate_utf8 = F_VALIDATE_UTF8 |
1541 |
PPCODE: |
1542 |
XPUSHs (boolSV (self->flags & ix)); |
1543 |
|
1544 |
void max_depth (CBOR *self, U32 max_depth = 0x80000000UL) |
1545 |
PPCODE: |
1546 |
self->max_depth = max_depth; |
1547 |
XPUSHs (ST (0)); |
1548 |
|
1549 |
U32 get_max_depth (CBOR *self) |
1550 |
CODE: |
1551 |
RETVAL = self->max_depth; |
1552 |
OUTPUT: |
1553 |
RETVAL |
1554 |
|
1555 |
void max_size (CBOR *self, U32 max_size = 0) |
1556 |
PPCODE: |
1557 |
self->max_size = max_size; |
1558 |
XPUSHs (ST (0)); |
1559 |
|
1560 |
int get_max_size (CBOR *self) |
1561 |
CODE: |
1562 |
RETVAL = self->max_size; |
1563 |
OUTPUT: |
1564 |
RETVAL |
1565 |
|
1566 |
void filter (CBOR *self, SV *filter = 0) |
1567 |
PPCODE: |
1568 |
SvREFCNT_dec (self->filter); |
1569 |
self->filter = filter ? newSVsv (filter) : filter; |
1570 |
XPUSHs (ST (0)); |
1571 |
|
1572 |
SV *get_filter (CBOR *self) |
1573 |
CODE: |
1574 |
RETVAL = self->filter ? self->filter : NEWSV (0, 0); |
1575 |
OUTPUT: |
1576 |
RETVAL |
1577 |
|
1578 |
void encode (CBOR *self, SV *scalar) |
1579 |
PPCODE: |
1580 |
PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN; |
1581 |
XPUSHs (scalar); |
1582 |
|
1583 |
void decode (CBOR *self, SV *cborstr) |
1584 |
PPCODE: |
1585 |
PUTBACK; cborstr = decode_cbor (cborstr, self, 0); SPAGAIN; |
1586 |
XPUSHs (cborstr); |
1587 |
|
1588 |
void decode_prefix (CBOR *self, SV *cborstr) |
1589 |
PPCODE: |
1590 |
{ |
1591 |
SV *sv; |
1592 |
char *offset; |
1593 |
PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN; |
1594 |
EXTEND (SP, 2); |
1595 |
PUSHs (sv); |
1596 |
PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr)))); |
1597 |
} |
1598 |
|
1599 |
void incr_parse (CBOR *self, SV *cborstr) |
1600 |
ALIAS: |
1601 |
incr_parse_multiple = 1 |
1602 |
PPCODE: |
1603 |
{ |
1604 |
if (SvUTF8 (cborstr)) |
1605 |
sv_utf8_downgrade (cborstr, 0); |
1606 |
|
1607 |
if (!self->incr_count) |
1608 |
{ |
1609 |
self->incr_count = newAV (); |
1610 |
self->incr_pos = 0; |
1611 |
self->incr_need = 1; |
1612 |
|
1613 |
av_push (self->incr_count, newSViv (1)); |
1614 |
} |
1615 |
|
1616 |
do |
1617 |
{ |
1618 |
if (!incr_parse (self, cborstr)) |
1619 |
{ |
1620 |
if (self->incr_need > self->max_size && self->max_size) |
1621 |
croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu", |
1622 |
(unsigned long)self->incr_need, (unsigned long)self->max_size); |
1623 |
|
1624 |
break; |
1625 |
} |
1626 |
|
1627 |
SV *sv; |
1628 |
char *offset; |
1629 |
|
1630 |
PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN; |
1631 |
XPUSHs (sv); |
1632 |
|
1633 |
sv_chop (cborstr, offset); |
1634 |
|
1635 |
av_clear (self->incr_count); |
1636 |
av_push (self->incr_count, newSViv (1)); |
1637 |
|
1638 |
self->incr_pos = 0; |
1639 |
self->incr_need = self->incr_pos + 1; |
1640 |
} |
1641 |
while (ix); |
1642 |
} |
1643 |
|
1644 |
void incr_reset (CBOR *self) |
1645 |
CODE: |
1646 |
{ |
1647 |
SvREFCNT_dec (self->incr_count); |
1648 |
self->incr_count = 0; |
1649 |
} |
1650 |
|
1651 |
void DESTROY (CBOR *self) |
1652 |
PPCODE: |
1653 |
cbor_free (self); |
1654 |
|
1655 |
PROTOTYPES: ENABLE |
1656 |
|
1657 |
void encode_cbor (SV *scalar) |
1658 |
ALIAS: |
1659 |
encode_cbor = 0 |
1660 |
encode_cbor_sharing = F_ALLOW_SHARING |
1661 |
PPCODE: |
1662 |
{ |
1663 |
CBOR cbor; |
1664 |
cbor_init (&cbor); |
1665 |
cbor.flags |= ix; |
1666 |
PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN; |
1667 |
XPUSHs (scalar); |
1668 |
} |
1669 |
|
1670 |
void decode_cbor (SV *cborstr) |
1671 |
PPCODE: |
1672 |
{ |
1673 |
CBOR cbor; |
1674 |
cbor_init (&cbor); |
1675 |
PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN; |
1676 |
XPUSHs (cborstr); |
1677 |
} |
1678 |
|