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Comparing CBOR-XS/XS.xs (file contents):
Revision 1.51 by root, Sun Apr 24 13:15:19 2016 UTC vs.
Revision 1.69 by root, Mon Nov 30 20:38:25 2020 UTC

… …
6#include <string.h> 6#include <string.h>
7#include <stdlib.h> 7#include <stdlib.h>
8#include <stdio.h> 8#include <stdio.h>
9#include <limits.h> 9#include <limits.h>
10#include <float.h> 10#include <float.h>
11#include <inttypes.h>
11 12
12#define ECB_NO_THREADS 1 13#define ECB_NO_THREADS 1
13#include "ecb.h" 14#include "ecb.h"
14 15
15// compatibility with perl <5.18 16// compatibility with perl <5.18
… …
20# define HvNAMELEN(hv) HvNAMELEN_get (hv) 21# define HvNAMELEN(hv) HvNAMELEN_get (hv)
21#endif 22#endif
22#ifndef HvNAMEUTF8 23#ifndef HvNAMEUTF8
23# define HvNAMEUTF8(hv) 0 24# define HvNAMEUTF8(hv) 0
24#endif 25#endif
26#ifndef SvREFCNT_inc_NN
27# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
28#endif
25#ifndef SvREFCNT_dec_NN 29#ifndef SvREFCNT_dec_NN
26# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv) 30# define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
27#endif 31#endif
28 32
29// known major and minor types 33// known major and minor types
… …
95 CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8 99 CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8
96 100
97 CBOR_TAG_MAGIC = 55799, // self-describe cbor 101 CBOR_TAG_MAGIC = 55799, // self-describe cbor
98}; 102};
99 103
104// known forced types, also hardcoded in CBOR.pm
105enum
106{
107 AS_CBOR = 0,
108 AS_INT = 1,
109 AS_BYTES = 2,
110 AS_TEXT = 3,
111 AS_FLOAT16 = 4,
112 AS_FLOAT32 = 5,
113 AS_FLOAT64 = 6,
114 // possibly future enhancements: (generic) float, (generic) string
115};
116
100#define F_SHRINK 0x00000001UL 117#define F_SHRINK 0x00000001UL
101#define F_ALLOW_UNKNOWN 0x00000002UL 118#define F_ALLOW_UNKNOWN 0x00000002UL
102#define F_ALLOW_SHARING 0x00000004UL 119#define F_ALLOW_SHARING 0x00000004UL
103#define F_ALLOW_CYCLES 0x00000008UL 120#define F_ALLOW_CYCLES 0x00000008UL
121#define F_FORBID_OBJECTS 0x00000010UL
104#define F_PACK_STRINGS 0x00000010UL 122#define F_PACK_STRINGS 0x00000020UL
123#define F_TEXT_KEYS 0x00000040UL
105#define F_UTF8_STRINGS 0x00000020UL 124#define F_TEXT_STRINGS 0x00000080UL
106#define F_VALIDATE_UTF8 0x00000040UL 125#define F_VALIDATE_UTF8 0x00000100UL
107 126
108#define INIT_SIZE 32 // initial scalar size to be allocated 127#define INIT_SIZE 32 // initial scalar size to be allocated
109 128
110#define SB do { 129#define SB do {
111#define SE } while (0) 130#define SE } while (0)
… …
184 203
185// minimum length of a string to be registered for stringref 204// minimum length of a string to be registered for stringref
186ecb_inline int 205ecb_inline int
187minimum_string_length (UV idx) 206minimum_string_length (UV idx)
188{ 207{
189 return idx > 23 208 return idx <= 23 ? 3
190 ? idx > 0xffU 209 : idx <= 0xffU ? 4
191 ? idx > 0xffffU 210 : idx <= 0xffffU ? 5
192 ? idx > 0xffffffffU 211 : idx <= 0xffffffffU ? 7
193 ? 11 212 : 11;
194 : 7
195 : 5
196 : 4
197 : 3;
198} 213}
199 214
200///////////////////////////////////////////////////////////////////////////// 215/////////////////////////////////////////////////////////////////////////////
201// encoder 216// encoder
202 217
… …
215} enc_t; 230} enc_t;
216 231
217ecb_inline void 232ecb_inline void
218need (enc_t *enc, STRLEN len) 233need (enc_t *enc, STRLEN len)
219{ 234{
220 if (ecb_expect_false (enc->cur + len >= enc->end)) 235 if (ecb_expect_false ((uintptr_t)(enc->end - enc->cur) < len))
221 { 236 {
222 STRLEN cur = enc->cur - (char *)SvPVX (enc->sv); 237 STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
223 SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1); 238 SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
224 enc->cur = SvPVX (enc->sv) + cur; 239 enc->cur = SvPVX (enc->sv) + cur;
225 enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1; 240 enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
… …
231{ 246{
232 need (enc, 1); 247 need (enc, 1);
233 *enc->cur++ = ch; 248 *enc->cur++ = ch;
234} 249}
235 250
251// used for tags, intregers, element counts and so on
236static void 252static void
237encode_uint (enc_t *enc, int major, UV len) 253encode_uint (enc_t *enc, int major, UV len)
238{ 254{
239 need (enc, 9); 255 need (enc, 9);
240 256
… …
271 *enc->cur++ = len >> 8; 287 *enc->cur++ = len >> 8;
272 *enc->cur++ = len; 288 *enc->cur++ = len;
273 } 289 }
274} 290}
275 291
292// encodes a perl value into a CBOR integer
293ecb_inline void
294encode_int (enc_t *enc, SV *sv)
295{
296 if (SvIsUV (sv))
297 encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
298 else if (SvIVX (sv) >= 0)
299 encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
300 else
301 encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
302}
303
276ecb_inline void 304ecb_inline void
277encode_tag (enc_t *enc, UV tag) 305encode_tag (enc_t *enc, UV tag)
278{ 306{
279 encode_uint (enc, MAJOR_TAG, tag); 307 encode_uint (enc, MAJOR_TAG, tag);
280} 308}
281 309
310// exceptional (hopefully) slow path for byte strings that need to be utf8-encoded
311ecb_noinline static void
312encode_str_utf8 (enc_t *enc, int utf8, char *str, STRLEN len)
313{
314 STRLEN ulen = len;
315 U8 *p, *pend = (U8 *)str + len;
316
317 for (p = (U8 *)str; p < pend; ++p)
318 ulen += *p >> 7; // count set high bits
319
320 encode_uint (enc, MAJOR_TEXT, ulen);
321
322 need (enc, ulen);
323 for (p = (U8 *)str; p < pend; ++p)
324 if (*p < 0x80)
325 *enc->cur++ = *p;
326 else
327 {
328 *enc->cur++ = 0xc0 + (*p >> 6);
329 *enc->cur++ = 0x80 + (*p & 63);
330 }
331}
332
282ecb_inline void 333ecb_inline void
283encode_str (enc_t *enc, int utf8, char *str, STRLEN len) 334encode_str (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
284{ 335{
285 if (ecb_expect_false (enc->cbor.flags & F_UTF8_STRINGS)) 336 if (ecb_expect_false (upgrade_utf8))
286 if (!utf8) 337 if (!utf8)
287 { 338 {
288 SV *sv = sv_newmortal ();
289 char *s; STRLEN l;
290
291 sv_setpvn (sv, str, len);
292
293 s = SvPVutf8 (sv, l);
294 encode_str (enc, 1, s, l); 339 encode_str_utf8 (enc, utf8, str, len);
295 return; 340 return;
296 } 341 }
297 342
298 encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len); 343 encode_uint (enc, utf8 ? MAJOR_TEXT : MAJOR_BYTES, len);
299 need (enc, len); 344 need (enc, len);
300 memcpy (enc->cur, str, len); 345 memcpy (enc->cur, str, len);
301 enc->cur += len; 346 enc->cur += len;
302} 347}
303 348
304static void 349ecb_inline void
305encode_strref (enc_t *enc, int utf8, char *str, STRLEN len) 350encode_strref (enc_t *enc, int upgrade_utf8, int utf8, char *str, STRLEN len)
306{ 351{
307 if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS)) 352 if (ecb_expect_false (enc->cbor.flags & F_PACK_STRINGS))
308 { 353 {
309 SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1); 354 SV **svp = hv_fetch (enc->stringref[!!utf8], str, len, 1);
310 355
… …
321 sv_setuv (*svp, enc->stringref_idx); 366 sv_setuv (*svp, enc->stringref_idx);
322 ++enc->stringref_idx; 367 ++enc->stringref_idx;
323 } 368 }
324 } 369 }
325 370
326 encode_str (enc, utf8, str, len); 371 encode_str (enc, upgrade_utf8, utf8, str, len);
372}
373
374ecb_inline void
375encode_float16 (enc_t *enc, NV nv)
376{
377 need (enc, 1+2);
378
379 *enc->cur++ = MAJOR_MISC | MISC_FLOAT16;
380
381 uint16_t fp = ecb_float_to_binary16 (nv);
382
383 if (!ecb_big_endian ())
384 fp = ecb_bswap16 (fp);
385
386 memcpy (enc->cur, &fp, 2);
387 enc->cur += 2;
388}
389
390ecb_inline void
391encode_float32 (enc_t *enc, NV nv)
392{
393 need (enc, 1+4);
394
395 *enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
396
397 uint32_t fp = ecb_float_to_binary32 (nv);
398
399 if (!ecb_big_endian ())
400 fp = ecb_bswap32 (fp);
401
402 memcpy (enc->cur, &fp, 4);
403 enc->cur += 4;
404}
405
406ecb_inline void
407encode_float64 (enc_t *enc, NV nv)
408{
409 need (enc, 1+8);
410
411 *enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
412
413 uint64_t fp = ecb_double_to_binary64 (nv);
414
415 if (!ecb_big_endian ())
416 fp = ecb_bswap64 (fp);
417
418 memcpy (enc->cur, &fp, 8);
419 enc->cur += 8;
420}
421
422ecb_inline void
423encode_bool (enc_t *enc, int istrue)
424{
425 encode_ch (enc, istrue ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE);
426}
427
428ecb_inline void
429encode_forced (enc_t *enc, UV type, SV *sv)
430{
431 switch (type)
432 {
433 case AS_CBOR:
434 {
435 STRLEN len;
436 char *str = SvPVbyte (sv, len);
437
438 need (enc, len);
439 memcpy (enc->cur, str, len);
440 enc->cur += len;
441 }
442 break;
443
444 case AS_BYTES:
445 {
446 STRLEN len;
447 char *str = SvPVbyte (sv, len);
448 encode_strref (enc, 0, 0, str, len);
449 }
450 break;
451
452 case AS_TEXT:
453 {
454 STRLEN len;
455 char *str = SvPVutf8 (sv, len);
456 encode_strref (enc, 1, 1, str, len);
457 }
458 break;
459
460 case AS_INT: encode_int (enc, sv); break;
461
462 case AS_FLOAT16: encode_float16 (enc, SvNV (sv)); break;
463 case AS_FLOAT32: encode_float32 (enc, SvNV (sv)); break;
464 case AS_FLOAT64: encode_float64 (enc, SvNV (sv)); break;
465
466 default:
467 croak ("encountered malformed CBOR::XS::Tagged object");
468 }
327} 469}
328 470
329static void encode_sv (enc_t *enc, SV *sv); 471static void encode_sv (enc_t *enc, SV *sv);
330 472
331static void 473static void
… …
338 480
339 ++enc->depth; 481 ++enc->depth;
340 482
341 encode_uint (enc, MAJOR_ARRAY, len + 1); 483 encode_uint (enc, MAJOR_ARRAY, len + 1);
342 484
343 if (SvMAGICAL (av)) 485 if (ecb_expect_false (SvMAGICAL (av)))
344 for (i = 0; i <= len; ++i) 486 for (i = 0; i <= len; ++i)
345 { 487 {
346 SV **svp = av_fetch (av, i, 0); 488 SV **svp = av_fetch (av, i, 0);
347 encode_sv (enc, svp ? *svp : &PL_sv_undef); 489 encode_sv (enc, svp ? *svp : &PL_sv_undef);
348 } 490 }
… …
367 ++enc->depth; 509 ++enc->depth;
368 510
369 int pairs = hv_iterinit (hv); 511 int pairs = hv_iterinit (hv);
370 int mg = SvMAGICAL (hv); 512 int mg = SvMAGICAL (hv);
371 513
372 if (mg) 514 if (ecb_expect_false (mg))
373 encode_ch (enc, MAJOR_MAP | MINOR_INDEF); 515 encode_ch (enc, MAJOR_MAP | MINOR_INDEF);
374 else 516 else
375 encode_uint (enc, MAJOR_MAP, pairs); 517 encode_uint (enc, MAJOR_MAP, pairs);
376 518
377 while ((he = hv_iternext (hv))) 519 while ((he = hv_iternext (hv)))
378 { 520 {
379 if (HeKLEN (he) == HEf_SVKEY) 521 if (HeKLEN (he) == HEf_SVKEY)
380 encode_sv (enc, HeSVKEY (he)); 522 encode_sv (enc, HeSVKEY (he));
381 else 523 else
382 encode_strref (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he)); 524 encode_strref (enc, enc->cbor.flags & (F_TEXT_KEYS | F_TEXT_STRINGS), HeKUTF8 (he), HeKEY (he), HeKLEN (he));
383 525
384 encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he)); 526 encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he));
385 } 527 }
386 528
387 if (mg) 529 if (ecb_expect_false (mg))
388 encode_ch (enc, MAJOR_MISC | MINOR_INDEF); 530 encode_ch (enc, MAJOR_MISC | MINOR_INDEF);
389 531
390 --enc->depth; 532 --enc->depth;
391} 533}
392 534
… …
412 554
413 HV *stash = SvSTASH (sv); 555 HV *stash = SvSTASH (sv);
414 556
415 if (stash == boolean_stash) 557 if (stash == boolean_stash)
416 { 558 {
417 encode_ch (enc, SvIV (sv) ? MAJOR_MISC | SIMPLE_TRUE : MAJOR_MISC | SIMPLE_FALSE); 559 encode_bool (enc, SvIV (sv));
418 return; 560 return;
419 } 561 }
420 else if (stash == error_stash) 562 else if (stash == error_stash)
421 { 563 {
422 encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF); 564 encode_ch (enc, MAJOR_MISC | SIMPLE_UNDEF);
… …
425 else if (stash == tagged_stash) 567 else if (stash == tagged_stash)
426 { 568 {
427 if (svt != SVt_PVAV) 569 if (svt != SVt_PVAV)
428 croak ("encountered CBOR::XS::Tagged object that isn't an array"); 570 croak ("encountered CBOR::XS::Tagged object that isn't an array");
429 571
572 switch (av_len ((AV *)sv))
573 {
574 case 2-1:
575 // actually a tagged value
430 encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1))); 576 encode_uint (enc, MAJOR_TAG, SvUV (*av_fetch ((AV *)sv, 0, 1)));
431 encode_sv (enc, *av_fetch ((AV *)sv, 1, 1)); 577 encode_sv (enc, *av_fetch ((AV *)sv, 1, 1));
578 break;
579
580 case 3-1:
581 // a forced type [value, type, undef]
582 encode_forced (enc, SvUV (*av_fetch ((AV *)sv, 1, 1)), *av_fetch ((AV *)sv, 0, 1));
583 break;
584
585 default:
586 croak ("encountered malformed CBOR::XS::Tagged object");
587 }
432 588
433 return; 589 return;
434 } 590 }
435 } 591 }
436 592
437 if (ecb_expect_false (SvREFCNT (sv) > 1) 593 if (ecb_expect_false (SvREFCNT (sv) > 1)
438 && ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING)) 594 && ecb_expect_false (enc->cbor.flags & F_ALLOW_SHARING))
439 { 595 {
440 if (!enc->shareable) 596 if (ecb_expect_false (!enc->shareable))
441 enc->shareable = (HV *)sv_2mortal ((SV *)newHV ()); 597 enc->shareable = (HV *)sv_2mortal ((SV *)newHV ());
442 598
443 SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1); 599 SV **svp = hv_fetch (enc->shareable, (char *)&sv, sizeof (sv), 1);
444 600
445 if (SvOK (*svp)) 601 if (SvOK (*svp))
… …
459 if (ecb_expect_false (SvOBJECT (sv))) 615 if (ecb_expect_false (SvOBJECT (sv)))
460 { 616 {
461 HV *stash = SvSTASH (sv); 617 HV *stash = SvSTASH (sv);
462 GV *method; 618 GV *method;
463 619
620 if (enc->cbor.flags & F_FORBID_OBJECTS)
621 croak ("encountered object '%s', but forbid_objects is enabled",
622 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
464 if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0))) 623 else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0)))
465 { 624 {
466 dSP; 625 dSP;
467 626
468 ENTER; SAVETMPS; 627 ENTER; SAVETMPS;
469 PUSHMARK (SP); 628 PUSHMARK (SP);
… …
488 else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0) 647 else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0)
489 { 648 {
490 dSP; 649 dSP;
491 650
492 ENTER; SAVETMPS; 651 ENTER; SAVETMPS;
493 SAVESTACK_POS ();
494 PUSHMARK (SP); 652 PUSHMARK (SP);
495 EXTEND (SP, 2); 653 EXTEND (SP, 2);
496 // we re-bless the reference to get overload and other niceties right 654 // we re-bless the reference to get overload and other niceties right
497 PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash)); 655 PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
498 PUSHs (sv_cbor); 656 PUSHs (sv_cbor);
… …
505 if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv) 663 if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv)
506 croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash)); 664 croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash));
507 665
508 encode_tag (enc, CBOR_TAG_PERL_OBJECT); 666 encode_tag (enc, CBOR_TAG_PERL_OBJECT);
509 encode_uint (enc, MAJOR_ARRAY, count + 1); 667 encode_uint (enc, MAJOR_ARRAY, count + 1);
510 encode_strref (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash)); 668 encode_strref (enc, 0, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash));
511 669
512 while (count) 670 {
671 int i;
672
673 for (i = 0; i < count; ++i)
513 encode_sv (enc, SP[1 - count--]); 674 encode_sv (enc, SP[i + 1 - count]);
675
676 SP -= count;
677 }
514 678
515 PUTBACK; 679 PUTBACK;
516 680
517 FREETMPS; LEAVE; 681 FREETMPS; LEAVE;
518 } 682 }
… …
540 704
541 if (ecb_expect_false (nv == (NV)(U32)nv)) 705 if (ecb_expect_false (nv == (NV)(U32)nv))
542 encode_uint (enc, MAJOR_POS_INT, (U32)nv); 706 encode_uint (enc, MAJOR_POS_INT, (U32)nv);
543 //TODO: maybe I32? 707 //TODO: maybe I32?
544 else if (ecb_expect_false (nv == (float)nv)) 708 else if (ecb_expect_false (nv == (float)nv))
545 { 709 encode_float32 (enc, nv);
546 uint32_t fp = ecb_float_to_binary32 (nv);
547
548 *enc->cur++ = MAJOR_MISC | MISC_FLOAT32;
549
550 if (!ecb_big_endian ())
551 fp = ecb_bswap32 (fp);
552
553 memcpy (enc->cur, &fp, 4);
554 enc->cur += 4;
555 }
556 else 710 else
557 { 711 encode_float64 (enc, nv);
558 uint64_t fp = ecb_double_to_binary64 (nv);
559
560 *enc->cur++ = MAJOR_MISC | MISC_FLOAT64;
561
562 if (!ecb_big_endian ())
563 fp = ecb_bswap64 (fp);
564
565 memcpy (enc->cur, &fp, 8);
566 enc->cur += 8;
567 }
568} 712}
569 713
570static void 714static void
571encode_sv (enc_t *enc, SV *sv) 715encode_sv (enc_t *enc, SV *sv)
572{ 716{
… …
574 718
575 if (SvPOKp (sv)) 719 if (SvPOKp (sv))
576 { 720 {
577 STRLEN len; 721 STRLEN len;
578 char *str = SvPV (sv, len); 722 char *str = SvPV (sv, len);
579 encode_strref (enc, SvUTF8 (sv), str, len); 723 encode_strref (enc, enc->cbor.flags & F_TEXT_STRINGS, SvUTF8 (sv), str, len);
580 } 724 }
581 else if (SvNOKp (sv)) 725 else if (SvNOKp (sv))
582 encode_nv (enc, sv); 726 encode_nv (enc, sv);
583 else if (SvIOKp (sv)) 727 else if (SvIOKp (sv))
584 { 728 encode_int (enc, sv);
585 if (SvIsUV (sv))
586 encode_uint (enc, MAJOR_POS_INT, SvUVX (sv));
587 else if (SvIVX (sv) >= 0)
588 encode_uint (enc, MAJOR_POS_INT, SvIVX (sv));
589 else
590 encode_uint (enc, MAJOR_NEG_INT, -(SvIVX (sv) + 1));
591 }
592 else if (SvROK (sv)) 729 else if (SvROK (sv))
593 encode_rv (enc, SvRV (sv)); 730 encode_rv (enc, SvRV (sv));
594 else if (!SvOK (sv)) 731 else if (!SvOK (sv))
595 encode_ch (enc, MAJOR_MISC | SIMPLE_NULL); 732 encode_ch (enc, MAJOR_MISC | SIMPLE_NULL);
596 else if (enc->cbor.flags & F_ALLOW_UNKNOWN) 733 else if (enc->cbor.flags & F_ALLOW_UNKNOWN)
… …
603static SV * 740static SV *
604encode_cbor (SV *scalar, CBOR *cbor) 741encode_cbor (SV *scalar, CBOR *cbor)
605{ 742{
606 enc_t enc = { 0 }; 743 enc_t enc = { 0 };
607 744
608 enc.cbor = *cbor; 745 enc.cbor = *cbor;
609 enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); 746 enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
610 enc.cur = SvPVX (enc.sv); 747 enc.cur = SvPVX (enc.sv);
611 enc.end = SvEND (enc.sv); 748 enc.end = SvEND (enc.sv);
612 749
613 SvPOK_only (enc.sv); 750 SvPOK_only (enc.sv);
614 751
615 if (cbor->flags & F_PACK_STRINGS) 752 if (cbor->flags & F_PACK_STRINGS)
616 { 753 {
… …
643 U32 depth; // recursion depth 780 U32 depth; // recursion depth
644 U32 maxdepth; // recursion depth limit 781 U32 maxdepth; // recursion depth limit
645 AV *shareable; 782 AV *shareable;
646 AV *stringref; 783 AV *stringref;
647 SV *decode_tagged; 784 SV *decode_tagged;
785 SV *err_sv; // optional sv for error, needs to be freed
648} dec_t; 786} dec_t;
649 787
650#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE 788// set dec->err to ERRSV
789ecb_cold static void
790err_errsv (dec_t *dec)
791{
792 if (!dec->err)
793 {
794 dec->err_sv = newSVsv (ERRSV);
651 795
652#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data") 796 // chop off the trailing \n
797 SvCUR_set (dec->err_sv, SvCUR (dec->err_sv) - 1);
798 *SvEND (dec->err_sv) = 0;
653 799
800 dec->err = SvPVutf8_nolen (dec->err_sv);
801 }
802}
803
804// the following functions are used to reduce code size and help the compiler to optimise
805ecb_cold static void
806err_set (dec_t *dec, const char *reason)
807{
808 if (!dec->err)
809 dec->err = reason;
810}
811
812ecb_cold static void
813err_unexpected_end (dec_t *dec)
814{
815 err_set (dec, "unexpected end of CBOR data");
816}
817
818#define ERR_DO(do) SB do; goto fail; SE
819#define ERR(reason) ERR_DO (err_set (dec, reason))
820#define ERR_ERRSV ERR_DO (err_errsv (dec))
821
822#define WANT(len) if (ecb_expect_false ((uintptr_t)(dec->end - dec->cur) < (STRLEN)len)) ERR_DO (err_unexpected_end (dec))
823
654#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED) 824#define DEC_INC_DEPTH if (ecb_expect_false (++dec->depth > dec->cbor.max_depth)) ERR (ERR_NESTING_EXCEEDED)
655#define DEC_DEC_DEPTH --dec->depth 825#define DEC_DEC_DEPTH --dec->depth
656 826
657static UV 827static UV
658decode_uint (dec_t *dec) 828decode_uint (dec_t *dec)
659{ 829{
… …
725 895
726 for (;;) 896 for (;;)
727 { 897 {
728 WANT (1); 898 WANT (1);
729 899
730 if (*dec->cur == (MAJOR_MISC | MINOR_INDEF)) 900 if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
731 { 901 {
732 ++dec->cur; 902 ++dec->cur;
733 break; 903 break;
734 } 904 }
735 905
736 av_push (av, decode_sv (dec)); 906 av_push (av, decode_sv (dec));
737 } 907 }
738 } 908 }
739 else 909 else
740 { 910 {
741 int i, len = decode_uint (dec); 911 UV i, len = decode_uint (dec);
742 912
743 WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays 913 WANT (len); // complexity check for av_fill - need at least one byte per value, do not allow supersize arrays
744 av_fill (av, len - 1); 914 av_fill (av, len - 1);
745 915
746 for (i = 0; i < len; ++i) 916 for (i = 0; i < len; ++i)
… …
749 919
750 DEC_DEC_DEPTH; 920 DEC_DEC_DEPTH;
751 return newRV_noinc ((SV *)av); 921 return newRV_noinc ((SV *)av);
752 922
753fail: 923fail:
754 SvREFCNT_dec (av); 924 SvREFCNT_dec_NN (av);
755 DEC_DEC_DEPTH; 925 DEC_DEC_DEPTH;
756 return &PL_sv_undef; 926 return &PL_sv_undef;
757} 927}
758 928
759static void 929static void
… …
763 // byte or utf-8 strings as keys, but only when !stringref 933 // byte or utf-8 strings as keys, but only when !stringref
764 934
765 if (ecb_expect_true (!dec->stringref)) 935 if (ecb_expect_true (!dec->stringref))
766 if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8)) 936 if (ecb_expect_true ((U8)(*dec->cur - MAJOR_BYTES) <= LENGTH_EXT8))
767 { 937 {
768 I32 len = decode_uint (dec); 938 STRLEN len = decode_uint (dec);
769 char *key = (char *)dec->cur; 939 char *key = (char *)dec->cur;
770 940
771 WANT (len); 941 WANT (len);
772 dec->cur += len; 942 dec->cur += len;
773 943
… …
775 945
776 return; 946 return;
777 } 947 }
778 else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8)) 948 else if (ecb_expect_true ((U8)(*dec->cur - MAJOR_TEXT) <= LENGTH_EXT8))
779 { 949 {
780 I32 len = decode_uint (dec); 950 STRLEN len = decode_uint (dec);
781 char *key = (char *)dec->cur; 951 char *key = (char *)dec->cur;
782 952
783 WANT (len); 953 WANT (len);
784 dec->cur += len; 954 dec->cur += len;
785 955
… …
793 } 963 }
794 964
795 SV *k = decode_sv (dec); 965 SV *k = decode_sv (dec);
796 SV *v = decode_sv (dec); 966 SV *v = decode_sv (dec);
797 967
968 // we leak memory if uncaught exceptions are thrown by random magical
969 // methods, and this is hopefully the only place where it can happen,
970 // so if there is a chance of an exception, take the very slow path.
971 // since catching exceptions is "undocumented/internal/forbidden" by
972 // the new p5p powers, we need to call out to a perl function :/
973 if (ecb_expect_false (SvAMAGIC (k)))
974 {
975 dSP;
976
977 ENTER; SAVETMPS;
978 PUSHMARK (SP);
979 EXTEND (SP, 3);
980 PUSHs (sv_2mortal (newRV_inc ((SV *)hv)));
981 PUSHs (sv_2mortal (k));
982 PUSHs (sv_2mortal (v));
983
984 PUTBACK;
985 call_pv ("CBOR::XS::_hv_store", G_VOID | G_DISCARD | G_EVAL);
986 SPAGAIN;
987
988 FREETMPS; LEAVE;
989
990 if (SvTRUE (ERRSV))
991 ERR_ERRSV;
992
993 return;
994 }
995
798 hv_store_ent (hv, k, v, 0); 996 hv_store_ent (hv, k, v, 0);
799 SvREFCNT_dec (k); 997 SvREFCNT_dec_NN (k);
800 998
801fail: 999fail:
802 ; 1000 ;
803} 1001}
804 1002
… …
815 1013
816 for (;;) 1014 for (;;)
817 { 1015 {
818 WANT (1); 1016 WANT (1);
819 1017
820 if (*dec->cur == (MAJOR_MISC | MINOR_INDEF)) 1018 if (*dec->cur == (MAJOR_MISC | MINOR_INDEF) || dec->err)
821 { 1019 {
822 ++dec->cur; 1020 ++dec->cur;
823 break; 1021 break;
824 } 1022 }
825 1023
826 decode_he (dec, hv); 1024 decode_he (dec, hv);
827 } 1025 }
828 } 1026 }
829 else 1027 else
830 { 1028 {
831 int pairs = decode_uint (dec); 1029 UV pairs = decode_uint (dec);
1030
1031 WANT (pairs); // complexity check - need at least one byte per value, do not allow supersize hashes
832 1032
833 while (pairs--) 1033 while (pairs--)
834 decode_he (dec, hv); 1034 decode_he (dec, hv);
835 } 1035 }
836 1036
837 DEC_DEC_DEPTH; 1037 DEC_DEC_DEPTH;
838 return newRV_noinc ((SV *)hv); 1038 return newRV_noinc ((SV *)hv);
839 1039
840fail: 1040fail:
841 SvREFCNT_dec (hv); 1041 SvREFCNT_dec_NN (hv);
842 DEC_DEC_DEPTH; 1042 DEC_DEC_DEPTH;
843 return &PL_sv_undef; 1043 return &PL_sv_undef;
844} 1044}
845 1045
846static SV * 1046static SV *
847decode_str (dec_t *dec, int utf8) 1047decode_str (dec_t *dec, int utf8)
848{ 1048{
849 SV *sv = 0; 1049 SV *sv = 0;
850 1050
851 if ((*dec->cur & MINOR_MASK) == MINOR_INDEF) 1051 if (ecb_expect_false ((*dec->cur & MINOR_MASK) == MINOR_INDEF))
852 { 1052 {
853 // indefinite length strings 1053 // indefinite length strings
854 ++dec->cur; 1054 ++dec->cur;
855 1055
856 U8 major = *dec->cur & MAJOR_MISC; 1056 U8 major = *dec->cur & MAJOR_MISC;
… …
924 sv = newRV_noinc (decode_sv (dec)); 1124 sv = newRV_noinc (decode_sv (dec));
925 break; 1125 break;
926 1126
927 case CBOR_TAG_STRINGREF_NAMESPACE: 1127 case CBOR_TAG_STRINGREF_NAMESPACE:
928 { 1128 {
1129 // do not use SAVETMPS/FREETMPS, as these will
1130 // erase mortalised caches, e.g. "shareable"
929 ENTER; SAVETMPS; 1131 ENTER;
930 1132
931 SAVESPTR (dec->stringref); 1133 SAVESPTR (dec->stringref);
932 dec->stringref = (AV *)sv_2mortal ((SV *)newAV ()); 1134 dec->stringref = (AV *)sv_2mortal ((SV *)newAV ());
933 1135
934 sv = decode_sv (dec); 1136 sv = decode_sv (dec);
935 1137
936 FREETMPS; LEAVE; 1138 LEAVE;
937 } 1139 }
938 break; 1140 break;
939 1141
940 case CBOR_TAG_STRINGREF: 1142 case CBOR_TAG_STRINGREF:
941 { 1143 {
942 if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT)) 1144 if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
943 ERR ("corrupted CBOR data (stringref index not an unsigned integer)"); 1145 ERR ("corrupted CBOR data (stringref index not an unsigned integer)");
944 1146
945 UV idx = decode_uint (dec); 1147 UV idx = decode_uint (dec);
946 1148
947 if (!dec->stringref || (int)idx > AvFILLp (dec->stringref)) 1149 if (!dec->stringref || idx >= (UV)(1 + AvFILLp (dec->stringref)))
948 ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)"); 1150 ERR ("corrupted CBOR data (stringref index out of bounds or outside namespace)");
949 1151
950 sv = newSVsv (AvARRAY (dec->stringref)[idx]); 1152 sv = newSVsv (AvARRAY (dec->stringref)[idx]);
951 } 1153 }
952 break; 1154 break;
… …
980 if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT)) 1182 if ((*dec->cur >> MAJOR_SHIFT) != (MAJOR_POS_INT >> MAJOR_SHIFT))
981 ERR ("corrupted CBOR data (sharedref index not an unsigned integer)"); 1183 ERR ("corrupted CBOR data (sharedref index not an unsigned integer)");
982 1184
983 UV idx = decode_uint (dec); 1185 UV idx = decode_uint (dec);
984 1186
985 if (!dec->shareable || (int)idx > AvFILLp (dec->shareable)) 1187 if (!dec->shareable || idx >= (UV)(1 + AvFILLp (dec->shareable)))
986 ERR ("corrupted CBOR data (sharedref index out of bounds)"); 1188 ERR ("corrupted CBOR data (sharedref index out of bounds)");
987 1189
988 sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]); 1190 sv = SvREFCNT_inc_NN (AvARRAY (dec->shareable)[idx]);
989 1191
990 if (sv == &PL_sv_undef) 1192 if (sv == &PL_sv_undef)
… …
992 } 1194 }
993 break; 1195 break;
994 1196
995 case CBOR_TAG_PERL_OBJECT: 1197 case CBOR_TAG_PERL_OBJECT:
996 { 1198 {
1199 if (dec->cbor.flags & F_FORBID_OBJECTS)
1200 goto filter;
1201
997 sv = decode_sv (dec); 1202 sv = decode_sv (dec);
998 1203
999 if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV) 1204 if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
1000 ERR ("corrupted CBOR data (non-array perl object)"); 1205 ERR ("corrupted CBOR data (non-array perl object)");
1001 1206
… …
1030 SPAGAIN; 1235 SPAGAIN;
1031 1236
1032 if (SvTRUE (ERRSV)) 1237 if (SvTRUE (ERRSV))
1033 { 1238 {
1034 FREETMPS; LEAVE; 1239 FREETMPS; LEAVE;
1035 ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV)))); 1240 ERR_ERRSV;
1036 } 1241 }
1037 1242
1038 SvREFCNT_dec (sv); 1243 SvREFCNT_dec_NN (sv);
1039 sv = SvREFCNT_inc (POPs); 1244 sv = SvREFCNT_inc (POPs);
1040 1245
1041 PUTBACK; 1246 PUTBACK;
1042 1247
1043 FREETMPS; LEAVE; 1248 FREETMPS; LEAVE;
1044 } 1249 }
1045 break; 1250 break;
1046 1251
1047 default: 1252 default:
1253 filter:
1048 { 1254 {
1255 SV *tag_sv = newSVuv (tag);
1256
1049 sv = decode_sv (dec); 1257 sv = decode_sv (dec);
1050 1258
1051 dSP; 1259 dSP;
1052 ENTER; SAVETMPS; 1260 ENTER; SAVETMPS;
1053 SAVESTACK_POS ();
1054 PUSHMARK (SP); 1261 PUSHMARK (SP);
1055 EXTEND (SP, 2); 1262 EXTEND (SP, 2);
1056 PUSHs (newSVuv (tag)); 1263 PUSHs (tag_sv);
1057 PUSHs (sv); 1264 PUSHs (sv);
1058 1265
1059 PUTBACK; 1266 PUTBACK;
1060 int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL); 1267 int count = call_sv (dec->cbor.filter ? dec->cbor.filter : default_filter, G_ARRAY | G_EVAL);
1061 SPAGAIN; 1268 SPAGAIN;
1062 1269
1063 if (SvTRUE (ERRSV)) 1270 if (SvTRUE (ERRSV))
1064 { 1271 {
1272 SvREFCNT_dec_NN (tag_sv);
1065 FREETMPS; LEAVE; 1273 FREETMPS; LEAVE;
1066 ERR (SvPVutf8_nolen (sv_2mortal (SvREFCNT_inc (ERRSV)))); 1274 ERR_ERRSV;
1067 } 1275 }
1068 1276
1069 if (count) 1277 if (count)
1070 { 1278 {
1279 SvREFCNT_dec_NN (tag_sv);
1071 SvREFCNT_dec (sv); 1280 SvREFCNT_dec_NN (sv);
1072 sv = SvREFCNT_inc (POPs); 1281 sv = SvREFCNT_inc_NN (TOPs);
1282 SP -= count;
1073 } 1283 }
1074 else 1284 else
1075 { 1285 {
1076 AV *av = newAV (); 1286 AV *av = newAV ();
1077 av_push (av, newSVuv (tag)); 1287 av_push (av, tag_sv);
1078 av_push (av, sv); 1288 av_push (av, sv);
1079 1289
1080 HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash 1290 HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash
1081 ? cbor_tagged_stash 1291 ? cbor_tagged_stash
1082 : gv_stashpv ("CBOR::XS::Tagged" , 1); 1292 : gv_stashpv ("CBOR::XS::Tagged" , 1);
… …
1211 1421
1212 if (dec.err) 1422 if (dec.err)
1213 { 1423 {
1214 if (dec.shareable) 1424 if (dec.shareable)
1215 { 1425 {
1216 // need to break cyclic links, which whould all be in shareable 1426 // need to break cyclic links, which would all be in shareable
1217 int i; 1427 int i;
1218 SV **svp; 1428 SV **svp;
1219 1429
1220 for (i = av_len (dec.shareable) + 1; i--; ) 1430 for (i = av_len (dec.shareable) + 1; i--; )
1221 if ((svp = av_fetch (dec.shareable, i, 0))) 1431 if ((svp = av_fetch (dec.shareable, i, 0)))
1222 sv_setsv (*svp, &PL_sv_undef); 1432 sv_setsv (*svp, &PL_sv_undef);
1223 } 1433 }
1224 1434
1225 SvREFCNT_dec (sv); 1435 SvREFCNT_dec_NN (sv);
1436
1437 if (dec.err_sv)
1438 sv_2mortal (dec.err_sv);
1439
1226 croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur); 1440 croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur);
1227 } 1441 }
1228 1442
1229 sv = sv_2mortal (sv); 1443 sv = sv_2mortal (sv);
1230 1444
… …
1374 1588
1375 default_filter = newSVpv ("CBOR::XS::default_filter", 0); 1589 default_filter = newSVpv ("CBOR::XS::default_filter", 0);
1376 1590
1377 sv_cbor = newSVpv ("CBOR", 0); 1591 sv_cbor = newSVpv ("CBOR", 0);
1378 SvREADONLY_on (sv_cbor); 1592 SvREADONLY_on (sv_cbor);
1593
1594 assert (("STRLEN must be an unsigned type", 0 <= (STRLEN)-1));
1379} 1595}
1380 1596
1381PROTOTYPES: DISABLE 1597PROTOTYPES: DISABLE
1382 1598
1383void CLONE (...) 1599void CLONE (...)
… …
1403 ALIAS: 1619 ALIAS:
1404 shrink = F_SHRINK 1620 shrink = F_SHRINK
1405 allow_unknown = F_ALLOW_UNKNOWN 1621 allow_unknown = F_ALLOW_UNKNOWN
1406 allow_sharing = F_ALLOW_SHARING 1622 allow_sharing = F_ALLOW_SHARING
1407 allow_cycles = F_ALLOW_CYCLES 1623 allow_cycles = F_ALLOW_CYCLES
1624 forbid_objects = F_FORBID_OBJECTS
1408 pack_strings = F_PACK_STRINGS 1625 pack_strings = F_PACK_STRINGS
1626 text_keys = F_TEXT_KEYS
1409 utf8_strings = F_UTF8_STRINGS 1627 text_strings = F_TEXT_STRINGS
1410 validate_utf8 = F_VALIDATE_UTF8 1628 validate_utf8 = F_VALIDATE_UTF8
1411 PPCODE: 1629 PPCODE:
1412{ 1630{
1413 if (enable) 1631 if (enable)
1414 self->flags |= ix; 1632 self->flags |= ix;
… …
1422 ALIAS: 1640 ALIAS:
1423 get_shrink = F_SHRINK 1641 get_shrink = F_SHRINK
1424 get_allow_unknown = F_ALLOW_UNKNOWN 1642 get_allow_unknown = F_ALLOW_UNKNOWN
1425 get_allow_sharing = F_ALLOW_SHARING 1643 get_allow_sharing = F_ALLOW_SHARING
1426 get_allow_cycles = F_ALLOW_CYCLES 1644 get_allow_cycles = F_ALLOW_CYCLES
1645 get_forbid_objects = F_FORBID_OBJECTS
1427 get_pack_strings = F_PACK_STRINGS 1646 get_pack_strings = F_PACK_STRINGS
1647 get_text_keys = F_TEXT_KEYS
1648 get_text_strings = F_TEXT_STRINGS
1428 get_validate_utf8 = F_VALIDATE_UTF8 1649 get_validate_utf8 = F_VALIDATE_UTF8
1429 PPCODE: 1650 PPCODE:
1430 XPUSHs (boolSV (self->flags & ix)); 1651 XPUSHs (boolSV (self->flags & ix));
1431 1652
1432void max_depth (CBOR *self, U32 max_depth = 0x80000000UL) 1653void max_depth (CBOR *self, U32 max_depth = 0x80000000UL)
… …
1562 cbor_init (&cbor); 1783 cbor_init (&cbor);
1563 PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN; 1784 PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN;
1564 XPUSHs (cborstr); 1785 XPUSHs (cborstr);
1565} 1786}
1566 1787
1788#ifdef __AFL_COMPILER
1789
1790void
1791afl_init ()
1792 CODE:
1793 __AFL_INIT ();
1794
1795int
1796afl_loop (unsigned int count = 10000)
1797 CODE:
1798 RETVAL = __AFL_LOOP (count);
1799 OUTPUT:
1800 RETVAL
1801
1802#endif
1803

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