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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.7 by root, Sat Oct 26 23:02:55 2013 UTC vs.
Revision 1.32 by root, Thu Nov 28 12:08:07 2013 UTC

… …
9#include <limits.h> 9#include <limits.h>
10#include <float.h> 10#include <float.h>
11 11
12#include "ecb.h" 12#include "ecb.h"
13 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 tags
29enum cbor_tag
30{
31 // extensions
32 CBOR_TAG_STRINGREF = 25, // http://cbor.schmorp.de/stringref
33 CBOR_TAG_PERL_OBJECT = 26, // http://cbor.schmorp.de/perl-object
34 CBOR_TAG_GENERIC_OBJECT = 27, // http://cbor.schmorp.de/generic-object
35 CBOR_TAG_VALUE_SHAREABLE = 28, // http://cbor.schmorp.de/value-sharing
36 CBOR_TAG_VALUE_SHAREDREF = 29, // http://cbor.schmorp.de/value-sharing
37 CBOR_TAG_STRINGREF_NAMESPACE = 256, // http://cbor.schmorp.de/stringref
38 CBOR_TAG_INDIRECTION = 22098, // http://cbor.schmorp.de/indirection
39
40 // rfc7049
41 CBOR_TAG_DATETIME = 0, // rfc4287, utf-8
42 CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any
43 CBOR_TAG_POS_BIGNUM = 2, // byte string
44 CBOR_TAG_NEG_BIGNUM = 3, // byte string
45 CBOR_TAG_DECIMAL = 4, // decimal fraction, array
46 CBOR_TAG_BIGFLOAT = 5, // array
47
48 CBOR_TAG_CONV_B64U = 21, // base64url, any
49 CBOR_TAG_CONV_B64 = 22, // base64, any
50 CBOR_TAG_CONV_HEX = 23, // base16, any
51 CBOR_TAG_CBOR = 24, // embedded cbor, byte string
52
53 CBOR_TAG_URI = 32, // URI rfc3986, utf-8
54 CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8
55 CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8
56 CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8
57 CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
58
59 CBOR_TAG_MAGIC = 55799 // self-describe cbor
60};
61
14#define F_SHRINK 0x00000200UL 62#define F_SHRINK 0x00000001UL
15#define F_ALLOW_UNKNOWN 0x00002000UL 63#define F_ALLOW_UNKNOWN 0x00000002UL
64#define F_ALLOW_SHARING 0x00000004UL
65#define F_PACK_STRINGS 0x00000008UL
16 66
17#define INIT_SIZE 32 // initial scalar size to be allocated 67#define INIT_SIZE 32 // initial scalar size to be allocated
18 68
19#define SB do { 69#define SB do {
20#define SE } while (0) 70#define SE } while (0)
… …
31#else 81#else
32# define CBOR_SLOW 0 82# define CBOR_SLOW 0
33# define CBOR_STASH cbor_stash 83# define CBOR_STASH cbor_stash
34#endif 84#endif
35 85
36static HV *cbor_stash, *cbor_boolean_stash, *cbor_tagged_stash; // CBOR::XS:: 86static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS::
37static SV *cbor_true, *cbor_false; 87static SV *types_true, *types_false, *types_error, *sv_cbor, *default_filter;
38 88
39typedef struct { 89typedef struct {
40 U32 flags; 90 U32 flags;
41 U32 max_depth; 91 U32 max_depth;
42 STRLEN max_size; 92 STRLEN max_size;
93 SV *filter;
43} CBOR; 94} CBOR;
44 95
45ecb_inline void 96ecb_inline void
46cbor_init (CBOR *cbor) 97cbor_init (CBOR *cbor)
47{ 98{
48 Zero (cbor, 1, CBOR); 99 Zero (cbor, 1, CBOR);
49 cbor->max_depth = 512; 100 cbor->max_depth = 512;
101}
102
103ecb_inline void
104cbor_free (CBOR *cbor)
105{
106 SvREFCNT_dec (cbor->filter);
50} 107}
51 108
52///////////////////////////////////////////////////////////////////////////// 109/////////////////////////////////////////////////////////////////////////////
53// utility functions 110// utility functions
54 111
… …
76 SvPV_renew (sv, SvCUR (sv) + 1); 133 SvPV_renew (sv, SvCUR (sv) + 1);
77#endif 134#endif
78 } 135 }
79} 136}
80 137
81///////////////////////////////////////////////////////////////////////////// 138// minimum length of a string to be registered for stringref
82// fp hell 139ecb_inline int
83 140minimum_string_length (UV idx)
84//TODO 141{
142 return idx > 23
143 ? idx > 0xffU
144 ? idx > 0xffffU
145 ? idx > 0xffffffffU
146 ? 11
147 : 7
148 : 5
149 : 4
150 : 3;
151}
85 152
86///////////////////////////////////////////////////////////////////////////// 153/////////////////////////////////////////////////////////////////////////////
87// encoder 154// encoder
88 155
89// structure used for encoding CBOR 156// structure used for encoding CBOR
… …
92 char *cur; // SvPVX (sv) + current output position 159 char *cur; // SvPVX (sv) + current output position
93 char *end; // SvEND (sv) 160 char *end; // SvEND (sv)
94 SV *sv; // result scalar 161 SV *sv; // result scalar
95 CBOR cbor; 162 CBOR cbor;
96 U32 depth; // recursion level 163 U32 depth; // recursion level
164 HV *stringref[2]; // string => index, or 0 ([0] = bytes, [1] = utf-8)
165 UV stringref_idx;
166 HV *shareable; // ptr => index, or 0
167 UV shareable_idx;
97} enc_t; 168} enc_t;
98 169
99ecb_inline void 170ecb_inline void
100need (enc_t *enc, STRLEN len) 171need (enc_t *enc, STRLEN len)
101{ 172{
… …
118static void 189static void
119encode_uint (enc_t *enc, int major, UV len) 190encode_uint (enc_t *enc, int major, UV len)
120{ 191{
121 need (enc, 9); 192 need (enc, 9);
122 193
123 if (len < 24) 194 if (ecb_expect_true (len < 24))
124 *enc->cur++ = major | len; 195 *enc->cur++ = major | len;
125 else if (len <= 0xff) 196 else if (ecb_expect_true (len <= 0xff))
126 { 197 {
127 *enc->cur++ = major | 24; 198 *enc->cur++ = major | 24;
128 *enc->cur++ = len; 199 *enc->cur++ = len;
129 } 200 }
130 else if (len <= 0xffff) 201 else if (len <= 0xffff)
… …
153 *enc->cur++ = len >> 8; 224 *enc->cur++ = len >> 8;
154 *enc->cur++ = len; 225 *enc->cur++ = len;
155 } 226 }
156} 227}
157 228
158static void 229ecb_inline void
230encode_tag (enc_t *enc, UV tag)
231{
232 encode_uint (enc, 0xc0, tag);
233}
234
235ecb_inline void
159encode_str (enc_t *enc, int utf8, char *str, STRLEN len) 236encode_str (enc_t *enc, int utf8, char *str, STRLEN len)
160{ 237{
161 encode_uint (enc, utf8 ? 0x60 : 0x40, len); 238 encode_uint (enc, utf8 ? 0x60 : 0x40, len);
162 need (enc, len); 239 need (enc, len);
163 memcpy (enc->cur, str, len); 240 memcpy (enc->cur, str, len);
164 enc->cur += len; 241 enc->cur += len;
165} 242}
166 243
244static void
245encode_strref (enc_t *enc, int utf8, char *str, STRLEN len)
246{
247 if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
248 {
249 SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
250
251 if (SvOK (*svp))
252 {
253 // already registered, use stringref
254 encode_tag (enc, CBOR_TAG_STRINGREF);
255 encode_uint (enc, 0x00, SvUV (*svp));
256 return;
257 }
258 else if (len >= minimum_string_length (enc->stringref_idx))
259 {
260 // register only
261 sv_setuv (*svp, enc->stringref_idx);
262 ++enc->stringref_idx;
263 }
264 }
265
266 encode_str (enc, utf8, str, len);
267}
268
167static void encode_sv (enc_t *enc, SV *sv); 269static void encode_sv (enc_t *enc, SV *sv);
168 270
169static void 271static void
170encode_av (enc_t *enc, AV *av) 272encode_av (enc_t *enc, AV *av)
171{ 273{
… …
208 while ((he = hv_iternext (hv))) 310 while ((he = hv_iternext (hv)))
209 { 311 {
210 if (HeKLEN (he) == HEf_SVKEY) 312 if (HeKLEN (he) == HEf_SVKEY)
211 encode_sv (enc, HeSVKEY (he)); 313 encode_sv (enc, HeSVKEY (he));
212 else 314 else
213 encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he)); 315 encode_strref (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he));
214 316
215 encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he)); 317 encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
216 } 318 }
217 319
218 if (mg) 320 if (mg)
… …
223 325
224// encode objects, arrays and special \0=false and \1=true values. 326// encode objects, arrays and special \0=false and \1=true values.
225static void 327static void
226encode_rv (enc_t *enc, SV *sv) 328encode_rv (enc_t *enc, SV *sv)
227{ 329{
228 svtype svt;
229
230 SvGETMAGIC (sv); 330 SvGETMAGIC (sv);
331
332 if (ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING)
333 && ecb_expect_false (SvREFCNT (sv) > 1))
334 {
335 if (!enc->shareable)
336 enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
337
338 SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
339
340 if (SvOK (*svp))
341 {
342 encode_tag (enc, CBOR_TAG_VALUE_SHAREDREF);
343 encode_uint (enc, 0x00, SvUV (*svp));
344 return;
345 }
346 else
347 {
348 sv_setuv (*svp, enc->shareable_idx);
349 ++enc->shareable_idx;
350 encode_tag (enc, CBOR_TAG_VALUE_SHAREABLE);
351 }
352 }
353
231 svt = SvTYPE (sv); 354 svtype svt = SvTYPE (sv);
232 355
233 if (ecb_expect_false (SvOBJECT (sv))) 356 if (ecb_expect_false (SvOBJECT (sv)))
234 { 357 {
235 HV *boolean_stash = !CBOR_SLOW || cbor_boolean_stash 358 HV *boolean_stash = !CBOR_SLOW || types_boolean_stash
236 ? cbor_boolean_stash 359 ? types_boolean_stash
237 : gv_stashpv ("CBOR::XS::Boolean", 1); 360 : gv_stashpv ("Types::Serialiser::Boolean", 1);
361 HV *error_stash = !CBOR_SLOW || types_error_stash
362 ? types_error_stash
363 : gv_stashpv ("Types::Serialiser::Error", 1);
238 HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash 364 HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
239 ? cbor_tagged_stash 365 ? cbor_tagged_stash
240 : gv_stashpv ("CBOR::XS::Tagged" , 1); 366 : gv_stashpv ("CBOR::XS::Tagged" , 1);
241 367
368 HV *stash = SvSTASH (sv);
369 GV *method;
370
242 if (SvSTASH (sv) == boolean_stash) 371 if (stash == boolean_stash)
243 encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20); 372 encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20);
373 else if (stash == error_stash)
374 encode_ch (enc, 0xe0 | 23);
244 else if (SvSTASH (sv) == tagged_stash) 375 else if (stash == tagged_stash)
245 { 376 {
246 if (svt != SVt_PVAV) 377 if (svt != SVt_PVAV)
247 croak ("encountered CBOR::XS::Tagged object that isn't an array"); 378 croak ("encountered CBOR::XS::Tagged object that isn't an array");
248 379
249 encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1))); 380 encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1)));
250 encode_sv (enc, *av_fetch ((AV *)sv, 1, 1)); 381 encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
251 } 382 }
383 else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
384 {
385 dSP;
386
387 ENTER; SAVETMPS; PUSHMARK (SP);
388 // we re-bless the reference to get overload and other niceties right
389 XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
390
391 PUTBACK;
392 // G_SCALAR ensures that return value is 1
393 call_sv ((SV *)GvCV (method), G_SCALAR);
394 SPAGAIN;
395
396 // catch this surprisingly common error
397 if (SvROK (TOPs) && SvRV (TOPs) == sv)
398 croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash));
399
400 encode_sv (enc, POPs);
401
402 PUTBACK;
403
404 FREETMPS; LEAVE;
405 }
406 else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
407 {
408 dSP;
409
410 ENTER; SAVETMPS; PUSHMARK (SP);
411 EXTEND (SP, 2);
412 // we re-bless the reference to get overload and other niceties right
413 PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
414 PUSHs (sv_cbor);
415
416 PUTBACK;
417 int count = call_sv ((SV *)GvCV (method), G_ARRAY);
418 SPAGAIN;
419
420 // catch this surprisingly common error
421 if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
422 croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
423
424 encode_tag (enc, CBOR_TAG_PERL_OBJECT);
425 encode_uint (enc, 0x80, count + 1);
426 encode_strref (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
427
428 while (count)
429 encode_sv (enc, SP[1 - count--]);
430
431 PUTBACK;
432
433 FREETMPS; LEAVE;
434 }
252 else 435 else
253 {
254 // we re-bless the reference to get overload and other niceties right
255 GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0);
256
257 if (to_cbor)
258 {
259 dSP;
260
261 ENTER; SAVETMPS; PUSHMARK (SP);
262 XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
263
264 // calling with G_SCALAR ensures that we always get a 1 return value
265 PUTBACK;
266 call_sv ((SV *)GvCV (to_cbor), G_SCALAR);
267 SPAGAIN;
268
269 // catch this surprisingly common error
270 if (SvROK (TOPs) && SvRV (TOPs) == sv)
271 croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
272
273 sv = POPs;
274 PUTBACK;
275
276 encode_sv (enc, sv);
277
278 FREETMPS; LEAVE;
279 }
280 else
281 croak ("encountered object '%s', but no TO_CBOR method available on it", 436 croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it",
282 SvPV_nolen (sv_2mortal (newRV_inc (sv)))); 437 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
283 }
284 } 438 }
285 else if (svt == SVt_PVHV) 439 else if (svt == SVt_PVHV)
286 encode_hv (enc, (HV *)sv); 440 encode_hv (enc, (HV *)sv);
287 else if (svt == SVt_PVAV) 441 else if (svt == SVt_PVAV)
288 encode_av (enc, (AV *)sv); 442 encode_av (enc, (AV *)sv);
289 else if (svt < SVt_PVAV)
290 {
291 STRLEN len = 0;
292 char *pv = svt ? SvPV (sv, len) : 0;
293
294 if (len == 1 && *pv == '1')
295 encode_ch (enc, 0xe0 | 21);
296 else if (len == 1 && *pv == '0')
297 encode_ch (enc, 0xe0 | 20);
298 else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
299 encode_ch (enc, 0xe0 | 23);
300 else
301 croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
302 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
303 }
304 else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
305 encode_ch (enc, 0xe0 | 23);
306 else 443 else
307 croak ("encountered %s, but CBOR can only represent references to arrays or hashes", 444 {
308 SvPV_nolen (sv_2mortal (newRV_inc (sv)))); 445 encode_tag (enc, CBOR_TAG_INDIRECTION);
446 encode_sv (enc, sv);
447 }
309} 448}
310 449
311static void 450static void
312encode_nv (enc_t *enc, SV *sv) 451encode_nv (enc_t *enc, SV *sv)
313{ 452{
… …
351 490
352 if (SvPOKp (sv)) 491 if (SvPOKp (sv))
353 { 492 {
354 STRLEN len; 493 STRLEN len;
355 char *str = SvPV (sv, len); 494 char *str = SvPV (sv, len);
356 encode_str (enc, SvUTF8 (sv), str, len); 495 encode_strref (enc, SvUTF8 (sv), str, len);
357 } 496 }
358 else if (SvNOKp (sv)) 497 else if (SvNOKp (sv))
359 encode_nv (enc, sv); 498 encode_nv (enc, sv);
360 else if (SvIOKp (sv)) 499 else if (SvIOKp (sv))
361 { 500 {
… …
378} 517}
379 518
380static SV * 519static SV *
381encode_cbor (SV *scalar, CBOR *cbor) 520encode_cbor (SV *scalar, CBOR *cbor)
382{ 521{
383 enc_t enc; 522 enc_t enc = { };
384 523
385 enc.cbor = *cbor; 524 enc.cbor = *cbor;
386 enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); 525 enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
387 enc.cur = SvPVX (enc.sv); 526 enc.cur = SvPVX (enc.sv);
388 enc.end = SvEND (enc.sv); 527 enc.end = SvEND (enc.sv);
389 enc.depth = 0;
390 528
391 SvPOK_only (enc.sv); 529 SvPOK_only (enc.sv);
530
531 if (cbor->flags & F_PACK_STRINGS)
532 {
533 encode_tag (&enc, CBOR_TAG_STRINGREF_NAMESPACE);
534 enc.stringref[0]= (HV *)sv_2mortal ((SV *)newHV ());
535 enc.stringref[1]= (HV *)sv_2mortal ((SV *)newHV ());
536 }
537
392 encode_sv (&enc, scalar); 538 encode_sv (&enc, scalar);
393 539
394 SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); 540 SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
395 *SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings 541 *SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
396 542
… …
410 U8 *end; // end of input string 556 U8 *end; // end of input string
411 const char *err; // parse error, if != 0 557 const char *err; // parse error, if != 0
412 CBOR cbor; 558 CBOR cbor;
413 U32 depth; // recursion depth 559 U32 depth; // recursion depth
414 U32 maxdepth; // recursion depth limit 560 U32 maxdepth; // recursion depth limit
561 AV *shareable;
562 AV *stringref;
563 SV *decode_tagged;
415} dec_t; 564} dec_t;
416 565
417#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE 566#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE
418 567
419#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data") 568#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data")
… …
513 SvREFCNT_dec (av); 662 SvREFCNT_dec (av);
514 DEC_DEC_DEPTH; 663 DEC_DEC_DEPTH;
515 return &PL_sv_undef; 664 return &PL_sv_undef;
516} 665}
517 666
667static void
668decode_he (dec_t *dec, HV *hv)
669{
670 // for speed reasons, we specialcase single-string
671 // byte or utf-8 strings as keys, but only when !stringref
672
673 if (ecb_expect_true (!dec->stringref))
674 if (*dec->cur >= 0x40 && *dec->cur <= 0x40 + 27)
675 {
676 I32 len = decode_uint (dec);
677 char *key = (char *)dec->cur;
678
679 dec->cur += len;
680
681 if (ecb_expect_false (dec->stringref))
682 av_push (dec->stringref, newSVpvn (key, len));
683
684 hv_store (hv, key, len, decode_sv (dec), 0);
685
686 return;
687 }
688 else if (*dec->cur >= 0x60 && *dec->cur <= 0x60 + 27)
689 {
690 I32 len = decode_uint (dec);
691 char *key = (char *)dec->cur;
692
693 dec->cur += len;
694
695 if (ecb_expect_false (dec->stringref))
696 av_push (dec->stringref, newSVpvn_utf8 (key, len, 1));
697
698 hv_store (hv, key, -len, decode_sv (dec), 0);
699
700 return;
701 }
702
703 SV *k = decode_sv (dec);
704 SV *v = decode_sv (dec);
705
706 hv_store_ent (hv, k, v, 0);
707 SvREFCNT_dec (k);
708}
709
518static SV * 710static SV *
519decode_hv (dec_t *dec) 711decode_hv (dec_t *dec)
520{ 712{
521 HV *hv = newHV (); 713 HV *hv = newHV ();
522 714
… …
534 { 726 {
535 ++dec->cur; 727 ++dec->cur;
536 break; 728 break;
537 } 729 }
538 730
539 SV *k = decode_sv (dec); 731 decode_he (dec, hv);
540 SV *v = decode_sv (dec);
541
542 hv_store_ent (hv, k, v, 0);
543 } 732 }
544 } 733 }
545 else 734 else
546 { 735 {
547 int len = decode_uint (dec); 736 int pairs = decode_uint (dec);
548 737
549 while (len--) 738 while (pairs--)
550 { 739 decode_he (dec, hv);
551 SV *k = decode_sv (dec);
552 SV *v = decode_sv (dec);
553
554 hv_store_ent (hv, k, v, 0);
555 }
556 } 740 }
557 741
558 DEC_DEC_DEPTH; 742 DEC_DEC_DEPTH;
559 return newRV_noinc ((SV *)hv); 743 return newRV_noinc ((SV *)hv);
560 744
… …
594 STRLEN len = decode_uint (dec); 778 STRLEN len = decode_uint (dec);
595 779
596 WANT (len); 780 WANT (len);
597 sv = newSVpvn (dec->cur, len); 781 sv = newSVpvn (dec->cur, len);
598 dec->cur += len; 782 dec->cur += len;
783
784 if (ecb_expect_false (dec->stringref)
785 && SvCUR (sv) >= minimum_string_length (AvFILLp (dec->stringref) + 1))
786 av_push (dec->stringref, SvREFCNT_inc_NN (sv));
599 } 787 }
600 788
601 if (utf8) 789 if (utf8)
602 SvUTF8_on (sv); 790 SvUTF8_on (sv);
603 791
… …
609} 797}
610 798
611static SV * 799static SV *
612decode_tagged (dec_t *dec) 800decode_tagged (dec_t *dec)
613{ 801{
802 SV *sv = 0;
614 UV tag = decode_uint (dec); 803 UV tag = decode_uint (dec);
804
805 WANT (1);
806
807 switch (tag)
808 {
809 case CBOR_TAG_MAGIC:
810 sv = decode_sv (dec);
811 break;
812
813 case CBOR_TAG_INDIRECTION:
814 sv = newRV_noinc (decode_sv (dec));
815 break;
816
817 case CBOR_TAG_STRINGREF_NAMESPACE:
818 {
819 ENTER; SAVETMPS;
820
821 SAVESPTR (dec->stringref);
822 dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
823
824 sv = decode_sv (dec);
825
826 FREETMPS; LEAVE;
827 }
828 break;
829
830 case CBOR_TAG_STRINGREF:
831 {
832 if ((*dec->cur >> 5) != 0)
833 ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
834
835 UV idx = decode_uint (dec);
836
837 if (!dec->stringref || (int)idx > AvFILLp (dec->stringref))
838 ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
839
840 sv = newSVsv (AvARRAY (dec->stringref)[idx]);
841 }
842 break;
843
844 case CBOR_TAG_VALUE_SHAREABLE:
845 {
846 if (ecb_expect_false (!dec->shareable))
847 dec->shareable = (AV *)sv_2mortal ((SV *)newAV ());
848
849 sv = newSV (0);
850 av_push (dec->shareable, SvREFCNT_inc_NN (sv));
851
615 SV *sv = decode_sv (dec); 852 SV *osv = decode_sv (dec);
853 sv_setsv (sv, osv);
854 SvREFCNT_dec_NN (osv);
855 }
856 break;
616 857
617 if (tag == 55799) // 2.4.5 Self-Describe CBOR 858 case CBOR_TAG_VALUE_SHAREDREF:
859 {
860 if ((*dec->cur >> 5) != 0)
861 ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
862
863 UV idx = decode_uint (dec);
864
865 if (!dec->shareable || (int)idx > AvFILLp (dec->shareable))
866 ERR ("corrupted CBOR data (sharedref index out of bounds)");
867
868 sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
869 }
870 break;
871
872 case CBOR_TAG_PERL_OBJECT:
873 {
874 sv = decode_sv (dec);
875
876 if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
877 ERR ("corrupted CBOR data (non-array perl object)");
878
879 AV *av = (AV *)SvRV (sv);
880 int len = av_len (av) + 1;
881 HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0);
882
883 if (!stash)
884 ERR ("cannot decode perl-object (package does not exist)");
885
886 GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
887
888 if (!method)
889 ERR ("cannot decode perl-object (package does not have a THAW method)");
890
891 dSP;
892
893 ENTER; SAVETMPS; PUSHMARK (SP);
894 EXTEND (SP, len + 1);
895 // we re-bless the reference to get overload and other niceties right
896 PUSHs (*av_fetch (av, 0, 1));
897 PUSHs (sv_cbor);
898
899 int i;
900
901 for (i = 1; i < len; ++i)
902 PUSHs (*av_fetch (av, i, 1));
903
904 PUTBACK;
905 call_sv ((SV *)GvCV (method), G_SCALAR | G_EVAL);
906 SPAGAIN;
907
908 if (SvTRUE (ERRSV))
909 {
910 FREETMPS; LEAVE;
911 ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
912 }
913
914 SvREFCNT_dec (sv);
915 sv = SvREFCNT_inc (POPs);
916
917 PUTBACK;
918
919 FREETMPS; LEAVE;
920 }
921 break;
922
923 default:
924 {
925 sv = decode_sv (dec);
926
927 dSP;
928 ENTER; SAVETMPS; PUSHMARK (SP);
929 EXTEND (SP, 2);
930 PUSHs (newSVuv (tag));
931 PUSHs (sv);
932
933 PUTBACK;
934 int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
935 SPAGAIN;
936
937 if (SvTRUE (ERRSV))
938 {
939 FREETMPS; LEAVE;
940 ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV))));
941 }
942
943 if (count)
944 {
945 SvREFCNT_dec (sv);
946 sv = SvREFCNT_inc (POPs);
947 }
948 else
949 {
950 AV *av = newAV ();
951 av_push (av, newSVuv (tag));
952 av_push (av, sv);
953
954 HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
955 ? cbor_tagged_stash
956 : gv_stashpv ("CBOR::XS::Tagged" , 1);
957 sv = sv_bless (newRV_noinc ((SV *)av), tagged_stash);
958 }
959
960 PUTBACK;
961
962 FREETMPS; LEAVE;
963 }
964 break;
965 }
966
618 return sv; 967 return sv;
619 968
620 AV *av = newAV (); 969fail:
621 av_push (av, newSVuv (tag)); 970 SvREFCNT_dec (sv);
622 av_push (av, sv); 971 return &PL_sv_undef;
623
624 HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
625 ? cbor_tagged_stash
626 : gv_stashpv ("CBOR::XS::Tagged" , 1);
627
628 return sv_bless (newRV_noinc ((SV *)av), tagged_stash);
629} 972}
630 973
631static SV * 974static SV *
632decode_sv (dec_t *dec) 975decode_sv (dec_t *dec)
633{ 976{
… …
652 case 7: // misc 995 case 7: // misc
653 switch (*dec->cur++ & 31) 996 switch (*dec->cur++ & 31)
654 { 997 {
655 case 20: 998 case 20:
656#if CBOR_SLOW 999#if CBOR_SLOW
657 cbor_false = get_bool ("CBOR::XS::false"); 1000 types_false = get_bool ("Types::Serialiser::false");
658#endif 1001#endif
659 return newSVsv (cbor_false); 1002 return newSVsv (types_false);
660 case 21: 1003 case 21:
661#if CBOR_SLOW 1004#if CBOR_SLOW
662 cbor_true = get_bool ("CBOR::XS::true"); 1005 types_true = get_bool ("Types::Serialiser::true");
663#endif 1006#endif
664 return newSVsv (cbor_true); 1007 return newSVsv (types_true);
665 case 22: 1008 case 22:
666 return newSVsv (&PL_sv_undef); 1009 return newSVsv (&PL_sv_undef);
1010 case 23:
1011#if CBOR_SLOW
1012 types_error = get_bool ("Types::Serialiser::error");
1013#endif
1014 return newSVsv (types_error);
667 1015
668 case 25: 1016 case 25:
669 { 1017 {
670 WANT (2); 1018 WANT (2);
671 1019
… …
715} 1063}
716 1064
717static SV * 1065static SV *
718decode_cbor (SV *string, CBOR *cbor, char **offset_return) 1066decode_cbor (SV *string, CBOR *cbor, char **offset_return)
719{ 1067{
720 dec_t dec; 1068 dec_t dec = { };
721 SV *sv; 1069 SV *sv;
1070 STRLEN len;
1071 char *data = SvPVbyte (string, len);
722 1072
723 /* work around bugs in 5.10 where manipulating magic values
724 * makes perl ignore the magic in subsequent accesses.
725 * also make a copy of non-PV values, to get them into a clean
726 * state (SvPV should do that, but it's buggy, see below).
727 */
728 /*SvGETMAGIC (string);*/
729 if (SvMAGICAL (string) || !SvPOK (string))
730 string = sv_2mortal (newSVsv (string));
731
732 SvUPGRADE (string, SVt_PV);
733
734 /* work around a bug in perl 5.10, which causes SvCUR to fail an
735 * assertion with -DDEBUGGING, although SvCUR is documented to
736 * return the xpv_cur field which certainly exists after upgrading.
737 * according to nicholas clark, calling SvPOK fixes this.
738 * But it doesn't fix it, so try another workaround, call SvPV_nolen
739 * and hope for the best.
740 * Damnit, SvPV_nolen still trips over yet another assertion. This
741 * assertion business is seriously broken, try yet another workaround
742 * for the broken -DDEBUGGING.
743 */
744 {
745#ifdef DEBUGGING
746 STRLEN offset = SvOK (string) ? sv_len (string) : 0;
747#else
748 STRLEN offset = SvCUR (string);
749#endif
750
751 if (offset > cbor->max_size && cbor->max_size) 1073 if (len > cbor->max_size && cbor->max_size)
752 croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu", 1074 croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu",
753 (unsigned long)SvCUR (string), (unsigned long)cbor->max_size); 1075 (unsigned long)len, (unsigned long)cbor->max_size);
754 }
755
756 sv_utf8_downgrade (string, 0);
757 1076
758 dec.cbor = *cbor; 1077 dec.cbor = *cbor;
759 dec.cur = (U8 *)SvPVX (string); 1078 dec.cur = (U8 *)data;
760 dec.end = (U8 *)SvEND (string); 1079 dec.end = (U8 *)data + len;
761 dec.err = 0;
762 dec.depth = 0;
763 1080
764 sv = decode_sv (&dec); 1081 sv = decode_sv (&dec);
765 1082
766 if (offset_return) 1083 if (offset_return)
767 *offset_return = dec.cur; 1084 *offset_return = dec.cur;
… …
771 dec.err = "garbage after CBOR object"; 1088 dec.err = "garbage after CBOR object";
772 1089
773 if (dec.err) 1090 if (dec.err)
774 { 1091 {
775 SvREFCNT_dec (sv); 1092 SvREFCNT_dec (sv);
776 croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur); 1093 croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
777 } 1094 }
778 1095
779 sv = sv_2mortal (sv); 1096 sv = sv_2mortal (sv);
780 1097
781 return sv; 1098 return sv;
… …
787MODULE = CBOR::XS PACKAGE = CBOR::XS 1104MODULE = CBOR::XS PACKAGE = CBOR::XS
788 1105
789BOOT: 1106BOOT:
790{ 1107{
791 cbor_stash = gv_stashpv ("CBOR::XS" , 1); 1108 cbor_stash = gv_stashpv ("CBOR::XS" , 1);
792 cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1);
793 cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1); 1109 cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1);
794 1110
795 cbor_true = get_bool ("CBOR::XS::true"); 1111 types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
796 cbor_false = get_bool ("CBOR::XS::false"); 1112 types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1);
1113
1114 types_true = get_bool ("Types::Serialiser::true" );
1115 types_false = get_bool ("Types::Serialiser::false");
1116 types_error = get_bool ("Types::Serialiser::error");
1117
1118 default_filter = newSVpv ("CBOR::XS::default_filter", 0);
1119
1120 sv_cbor = newSVpv ("CBOR", 0);
1121 SvREADONLY_on (sv_cbor);
797} 1122}
798 1123
799PROTOTYPES: DISABLE 1124PROTOTYPES: DISABLE
800 1125
801void CLONE (...) 1126void CLONE (...)
802 CODE: 1127 CODE:
803 cbor_stash = 0; 1128 cbor_stash = 0;
804 cbor_boolean_stash = 0;
805 cbor_tagged_stash = 0; 1129 cbor_tagged_stash = 0;
1130 types_error_stash = 0;
1131 types_boolean_stash = 0;
806 1132
807void new (char *klass) 1133void new (char *klass)
808 PPCODE: 1134 PPCODE:
809{ 1135{
810 SV *pv = NEWSV (0, sizeof (CBOR)); 1136 SV *pv = NEWSV (0, sizeof (CBOR));
… …
818 1144
819void shrink (CBOR *self, int enable = 1) 1145void shrink (CBOR *self, int enable = 1)
820 ALIAS: 1146 ALIAS:
821 shrink = F_SHRINK 1147 shrink = F_SHRINK
822 allow_unknown = F_ALLOW_UNKNOWN 1148 allow_unknown = F_ALLOW_UNKNOWN
1149 allow_sharing = F_ALLOW_SHARING
1150 pack_strings = F_PACK_STRINGS
823 PPCODE: 1151 PPCODE:
824{ 1152{
825 if (enable) 1153 if (enable)
826 self->flags |= ix; 1154 self->flags |= ix;
827 else 1155 else
… …
832 1160
833void get_shrink (CBOR *self) 1161void get_shrink (CBOR *self)
834 ALIAS: 1162 ALIAS:
835 get_shrink = F_SHRINK 1163 get_shrink = F_SHRINK
836 get_allow_unknown = F_ALLOW_UNKNOWN 1164 get_allow_unknown = F_ALLOW_UNKNOWN
1165 get_allow_sharing = F_ALLOW_SHARING
1166 get_pack_strings = F_PACK_STRINGS
837 PPCODE: 1167 PPCODE:
838 XPUSHs (boolSV (self->flags & ix)); 1168 XPUSHs (boolSV (self->flags & ix));
839 1169
840void max_depth (CBOR *self, U32 max_depth = 0x80000000UL) 1170void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
841 PPCODE: 1171 PPCODE:
… …
857 CODE: 1187 CODE:
858 RETVAL = self->max_size; 1188 RETVAL = self->max_size;
859 OUTPUT: 1189 OUTPUT:
860 RETVAL 1190 RETVAL
861 1191
862#if 0 //TODO 1192void filter (CBOR *self, SV *filter = 0)
863
864void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef)
865 PPCODE: 1193 PPCODE:
866{
867 SvREFCNT_dec (self->cb_object); 1194 SvREFCNT_dec (self->filter);
868 self->cb_object = SvOK (cb) ? newSVsv (cb) : 0; 1195 self->filter = filter ? newSVsv (filter) : filter;
869
870 XPUSHs (ST (0)); 1196 XPUSHs (ST (0));
871}
872 1197
873void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef) 1198SV *get_filter (CBOR *self)
874 PPCODE: 1199 CODE:
875{ 1200 RETVAL = self->filter ? self->filter : NEWSV (0, 0);
876 if (!self->cb_sk_object) 1201 OUTPUT:
877 self->cb_sk_object = newHV (); 1202 RETVAL
878
879 if (SvOK (cb))
880 hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
881 else
882 {
883 hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0);
884
885 if (!HvKEYS (self->cb_sk_object))
886 {
887 SvREFCNT_dec (self->cb_sk_object);
888 self->cb_sk_object = 0;
889 }
890 }
891
892 XPUSHs (ST (0));
893}
894
895#endif
896 1203
897void encode (CBOR *self, SV *scalar) 1204void encode (CBOR *self, SV *scalar)
898 PPCODE: 1205 PPCODE:
899 PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN; 1206 PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN;
900 XPUSHs (scalar); 1207 XPUSHs (scalar);
… …
913 EXTEND (SP, 2); 1220 EXTEND (SP, 2);
914 PUSHs (sv); 1221 PUSHs (sv);
915 PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr)))); 1222 PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr))));
916} 1223}
917 1224
918#if 0
919
920void DESTROY (CBOR *self) 1225void DESTROY (CBOR *self)
921 CODE: 1226 PPCODE:
922 SvREFCNT_dec (self->cb_sk_object); 1227 cbor_free (self);
923 SvREFCNT_dec (self->cb_object);
924
925#endif
926 1228
927PROTOTYPES: ENABLE 1229PROTOTYPES: ENABLE
928 1230
929void encode_cbor (SV *scalar) 1231void encode_cbor (SV *scalar)
930 PPCODE: 1232 PPCODE:

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