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Comparing JSON-XS/XS.xs (file contents):
Revision 1.15 by root, Sun Mar 25 02:32:40 2007 UTC vs.
Revision 1.32 by root, Wed May 9 16:41:12 2007 UTC

3#include "XSUB.h" 3#include "XSUB.h"
4 4
5#include "assert.h" 5#include "assert.h"
6#include "string.h" 6#include "string.h"
7#include "stdlib.h" 7#include "stdlib.h"
8#include "stdio.h"
8 9
10#if defined(__BORLANDC__) || defined(_MSC_VER)
11# define snprintf _snprintf // C compilers have this in stdio.h
12#endif
13
9#define F_ASCII 0x00000001 14#define F_ASCII 0x00000001UL
15#define F_LATIN1 0x00000002UL
10#define F_UTF8 0x00000002 16#define F_UTF8 0x00000004UL
11#define F_INDENT 0x00000004 17#define F_INDENT 0x00000008UL
12#define F_CANONICAL 0x00000008 18#define F_CANONICAL 0x00000010UL
13#define F_SPACE_BEFORE 0x00000010 19#define F_SPACE_BEFORE 0x00000020UL
14#define F_SPACE_AFTER 0x00000020 20#define F_SPACE_AFTER 0x00000040UL
15#define F_ALLOW_NONREF 0x00000080 21#define F_ALLOW_NONREF 0x00000100UL
16#define F_SHRINK 0x00000100 22#define F_SHRINK 0x00000200UL
23#define F_MAXDEPTH 0xf8000000UL
24#define S_MAXDEPTH 27
25
26#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
27
28// F_SELFCONVERT? <=> to_json/toJson
29// F_BLESSED? <=> { $__class__$ => }
17 30
18#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER 31#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER
19#define F_DEFAULT 0 32#define F_DEFAULT (9UL << S_MAXDEPTH)
20 33
21#define INIT_SIZE 32 // initial scalar size to be allocated 34#define INIT_SIZE 32 // initial scalar size to be allocated
22#define INDENT_STEP 3 // spaces per indentation level 35#define INDENT_STEP 3 // spaces per indentation level
23 36
24#define UTF8_MAX_LEN 11 // for perls UTF-X: max. number of octets per character
25#define SHORT_STRING_LEN 512 // special-case strings of up to this size 37#define SHORT_STRING_LEN 512 // special-case strings of up to this size
26 38
27#define SB do { 39#define SB do {
28#define SE } while (0) 40#define SE } while (0)
29 41
69 { 81 {
70 *clen = 2; 82 *clen = 2;
71 return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f); 83 return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);
72 } 84 }
73 else 85 else
86 {
87 *clen = (STRLEN)-1;
74 return (UV)-1; 88 return (UV)-1;
89 }
75} 90}
76 91
77///////////////////////////////////////////////////////////////////////////// 92/////////////////////////////////////////////////////////////////////////////
78// encoder 93// encoder
79 94
81typedef struct 96typedef struct
82{ 97{
83 char *cur; // SvPVX (sv) + current output position 98 char *cur; // SvPVX (sv) + current output position
84 char *end; // SvEND (sv) 99 char *end; // SvEND (sv)
85 SV *sv; // result scalar 100 SV *sv; // result scalar
86 UV flags; // F_* 101 U32 flags; // F_*
87 int indent; // indentation level 102 U32 indent; // indentation level
88 int max_depth; // max. recursion level 103 U32 maxdepth; // max. indentation/recursion level
89} enc_t; 104} enc_t;
90 105
91static void 106static void
92need (enc_t *enc, STRLEN len) 107need (enc_t *enc, STRLEN len)
93{ 108{
94 if (enc->cur + len >= enc->end) 109 if (enc->cur + len >= enc->end)
95 { 110 {
96 STRLEN cur = enc->cur - SvPVX (enc->sv); 111 STRLEN cur = enc->cur - SvPVX (enc->sv);
97 SvGROW (enc->sv, cur + len + 1); 112 SvGROW (enc->sv, cur + len + 1);
98 enc->cur = SvPVX (enc->sv) + cur; 113 enc->cur = SvPVX (enc->sv) + cur;
99 enc->end = SvPVX (enc->sv) + SvLEN (enc->sv); 114 enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
100 } 115 }
101} 116}
102 117
103static void 118static void
104encode_ch (enc_t *enc, char ch) 119encode_ch (enc_t *enc, char ch)
166 } 181 }
167 182
168 if (uch > 0x10FFFFUL) 183 if (uch > 0x10FFFFUL)
169 croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch); 184 croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
170 185
171 if (uch < 0x80 || enc->flags & F_ASCII) 186 if (uch < 0x80 || enc->flags & F_ASCII || (enc->flags & F_LATIN1 && uch > 0xFF))
172 { 187 {
173 if (uch > 0xFFFFUL) 188 if (uch > 0xFFFFUL)
174 { 189 {
175 need (enc, len += 11); 190 need (enc, len += 11);
176 sprintf (enc->cur, "\\u%04x\\u%04x", 191 sprintf (enc->cur, "\\u%04x\\u%04x",
190 *enc->cur++ = hexdigit [(uch >> 0) & 15]; 205 *enc->cur++ = hexdigit [(uch >> 0) & 15];
191 } 206 }
192 207
193 str += clen; 208 str += clen;
194 } 209 }
210 else if (enc->flags & F_LATIN1)
211 {
212 *enc->cur++ = uch;
213 str += clen;
214 }
195 else if (is_utf8) 215 else if (is_utf8)
196 { 216 {
197 need (enc, len += clen); 217 need (enc, len += clen);
198 do 218 do
199 { 219 {
201 } 221 }
202 while (--clen); 222 while (--clen);
203 } 223 }
204 else 224 else
205 { 225 {
206 need (enc, len += UTF8_MAX_LEN - 1); // never more than 11 bytes needed 226 need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed
207 enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0); 227 enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0);
208 ++str; 228 ++str;
209 } 229 }
210 } 230 }
211 } 231 }
261static void 281static void
262encode_av (enc_t *enc, AV *av) 282encode_av (enc_t *enc, AV *av)
263{ 283{
264 int i, len = av_len (av); 284 int i, len = av_len (av);
265 285
286 if (enc->indent >= enc->maxdepth)
287 croak ("data structure too deep (hit recursion limit)");
288
266 encode_ch (enc, '['); encode_nl (enc); 289 encode_ch (enc, '['); encode_nl (enc);
267 ++enc->indent; 290 ++enc->indent;
268 291
269 for (i = 0; i <= len; ++i) 292 for (i = 0; i <= len; ++i)
270 { 293 {
335 358
336static void 359static void
337encode_hv (enc_t *enc, HV *hv) 360encode_hv (enc_t *enc, HV *hv)
338{ 361{
339 int count, i; 362 int count, i;
363
364 if (enc->indent >= enc->maxdepth)
365 croak ("data structure too deep (hit recursion limit)");
340 366
341 encode_ch (enc, '{'); encode_nl (enc); ++enc->indent; 367 encode_ch (enc, '{'); encode_nl (enc); ++enc->indent;
342 368
343 if ((count = hv_iterinit (hv))) 369 if ((count = hv_iterinit (hv)))
344 { 370 {
392 418
393 encode_nl (enc); 419 encode_nl (enc);
394 } 420 }
395 else 421 else
396 { 422 {
397 SV *sv;
398 HE *he = hv_iternext (hv); 423 HE *he = hv_iternext (hv);
399 424
400 for (;;) 425 for (;;)
401 { 426 {
402 encode_indent (enc); 427 encode_indent (enc);
411 encode_nl (enc); 436 encode_nl (enc);
412 } 437 }
413 } 438 }
414 439
415 --enc->indent; encode_indent (enc); encode_ch (enc, '}'); 440 --enc->indent; encode_indent (enc); encode_ch (enc, '}');
441}
442
443// encode objects, arrays and special \0=false and \1=true values.
444static void
445encode_rv (enc_t *enc, SV *sv)
446{
447 svtype svt;
448
449 SvGETMAGIC (sv);
450 svt = SvTYPE (sv);
451
452 if (svt == SVt_PVHV)
453 encode_hv (enc, (HV *)sv);
454 else if (svt == SVt_PVAV)
455 encode_av (enc, (AV *)sv);
456 else if (svt < SVt_PVAV)
457 {
458 if (SvNIOK (sv) && SvIV (sv) == 0)
459 encode_str (enc, "false", 5, 0);
460 else if (SvNIOK (sv) && SvIV (sv) == 1)
461 encode_str (enc, "true", 4, 0);
462 else
463 croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
464 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
465 }
466 else
467 croak ("encountered %s, but JSON can only represent references to arrays or hashes",
468 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
416} 469}
417 470
418static void 471static void
419encode_sv (enc_t *enc, SV *sv) 472encode_sv (enc_t *enc, SV *sv)
420{ 473{
441 SvIsUV(sv) 494 SvIsUV(sv)
442 ? snprintf (enc->cur, 64, "%"UVuf, (UV)SvUVX (sv)) 495 ? snprintf (enc->cur, 64, "%"UVuf, (UV)SvUVX (sv))
443 : snprintf (enc->cur, 64, "%"IVdf, (IV)SvIVX (sv)); 496 : snprintf (enc->cur, 64, "%"IVdf, (IV)SvIVX (sv));
444 } 497 }
445 else if (SvROK (sv)) 498 else if (SvROK (sv))
446 { 499 encode_rv (enc, SvRV (sv));
447 SV *rv = SvRV (sv);
448
449 if (enc->indent >= enc->max_depth)
450 croak ("data structure too deep (hit recursion limit)");
451
452 switch (SvTYPE (rv))
453 {
454 case SVt_PVAV: encode_av (enc, (AV *)rv); break;
455 case SVt_PVHV: encode_hv (enc, (HV *)rv); break;
456
457 default:
458 croak ("encountered %s, but JSON can only represent references to arrays or hashes",
459 SvPV_nolen (sv));
460 }
461 }
462 else if (!SvOK (sv)) 500 else if (!SvOK (sv))
463 encode_str (enc, "null", 4, 0); 501 encode_str (enc, "null", 4, 0);
464 else 502 else
465 croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this", 503 croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",
466 SvPV_nolen (sv), SvFLAGS (sv)); 504 SvPV_nolen (sv), SvFLAGS (sv));
467} 505}
468 506
469static SV * 507static SV *
470encode_json (SV *scalar, UV flags) 508encode_json (SV *scalar, U32 flags)
471{ 509{
510 enc_t enc;
511
472 if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar)) 512 if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar))
473 croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)"); 513 croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
474 514
475 enc_t enc;
476 enc.flags = flags; 515 enc.flags = flags;
477 enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); 516 enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
478 enc.cur = SvPVX (enc.sv); 517 enc.cur = SvPVX (enc.sv);
479 enc.end = SvEND (enc.sv); 518 enc.end = SvEND (enc.sv);
480 enc.indent = 0; 519 enc.indent = 0;
481 enc.max_depth = 0x7fffffffUL; 520 enc.maxdepth = DEC_DEPTH (flags);
482 521
483 SvPOK_only (enc.sv); 522 SvPOK_only (enc.sv);
484 encode_sv (&enc, scalar); 523 encode_sv (&enc, scalar);
485 524
525 SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
526 *SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
527
486 if (!(flags & (F_ASCII | F_UTF8))) 528 if (!(flags & (F_ASCII | F_LATIN1 | F_UTF8)))
487 SvUTF8_on (enc.sv); 529 SvUTF8_on (enc.sv);
488
489 SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
490 530
491 if (enc.flags & F_SHRINK) 531 if (enc.flags & F_SHRINK)
492 shrink (enc.sv); 532 shrink (enc.sv);
493 533
494 return enc.sv; 534 return enc.sv;
501typedef struct 541typedef struct
502{ 542{
503 char *cur; // current parser pointer 543 char *cur; // current parser pointer
504 char *end; // end of input string 544 char *end; // end of input string
505 const char *err; // parse error, if != 0 545 const char *err; // parse error, if != 0
506 UV flags; // F_* 546 U32 flags; // F_*
547 U32 depth; // recursion depth
548 U32 maxdepth; // recursion depth limit
507} dec_t; 549} dec_t;
508 550
509static void 551static void
510decode_ws (dec_t *dec) 552decode_ws (dec_t *dec)
511{ 553{
520 ++dec->cur; 562 ++dec->cur;
521 } 563 }
522} 564}
523 565
524#define ERR(reason) SB dec->err = reason; goto fail; SE 566#define ERR(reason) SB dec->err = reason; goto fail; SE
567
525#define EXPECT_CH(ch) SB \ 568#define EXPECT_CH(ch) SB \
526 if (*dec->cur != ch) \ 569 if (*dec->cur != ch) \
527 ERR (# ch " expected"); \ 570 ERR (# ch " expected"); \
528 ++dec->cur; \ 571 ++dec->cur; \
529 SE 572 SE
530 573
574#define DEC_INC_DEPTH if (++dec->depth > dec->maxdepth) ERR ("json datastructure exceeds maximum nesting level (set a higher max_depth)")
575#define DEC_DEC_DEPTH --dec->depth
576
531static SV *decode_sv (dec_t *dec); 577static SV *decode_sv (dec_t *dec);
532 578
533static signed char decode_hexdigit[256]; 579static signed char decode_hexdigit[256];
534 580
535static UV 581static UV
560 SV *sv = 0; 606 SV *sv = 0;
561 int utf8 = 0; 607 int utf8 = 0;
562 608
563 do 609 do
564 { 610 {
565 char buf [SHORT_STRING_LEN + UTF8_MAX_LEN]; 611 char buf [SHORT_STRING_LEN + UTF8_MAXBYTES];
566 char *cur = buf; 612 char *cur = buf;
567 613
568 do 614 do
569 { 615 {
570 unsigned char ch = *(unsigned char *)dec->cur++; 616 unsigned char ch = *(unsigned char *)dec->cur++;
636 } 682 }
637 else if (ch >= 0x20 && ch <= 0x7f) 683 else if (ch >= 0x20 && ch <= 0x7f)
638 *cur++ = ch; 684 *cur++ = ch;
639 else if (ch >= 0x80) 685 else if (ch >= 0x80)
640 { 686 {
687 STRLEN clen;
688 UV uch;
689
641 --dec->cur; 690 --dec->cur;
642 691
643 STRLEN clen;
644 UV uch = decode_utf8 (dec->cur, dec->end - dec->cur, &clen); 692 uch = decode_utf8 (dec->cur, dec->end - dec->cur, &clen);
645 if (clen == (STRLEN)-1) 693 if (clen == (STRLEN)-1)
646 ERR ("malformed UTF-8 character in JSON string"); 694 ERR ("malformed UTF-8 character in JSON string");
647 695
648 do 696 do
649 {
650 *cur++ = *dec->cur++; 697 *cur++ = *dec->cur++;
651 }
652 while (--clen); 698 while (--clen);
653 699
654 utf8 = 1; 700 utf8 = 1;
655 } 701 }
656 else if (!ch)
657 ERR ("unexpected end of string while parsing json string");
658 else 702 else
703 {
704 --dec->cur;
705
706 if (!ch)
707 ERR ("unexpected end of string while parsing JSON string");
708 else
659 ERR ("invalid character encountered"); 709 ERR ("invalid character encountered while parsing JSON string");
660 710 }
661 } 711 }
662 while (cur < buf + SHORT_STRING_LEN); 712 while (cur < buf + SHORT_STRING_LEN);
663 713
714 {
664 STRLEN len = cur - buf; 715 STRLEN len = cur - buf;
665 716
666 if (sv) 717 if (sv)
667 { 718 {
668 SvGROW (sv, SvCUR (sv) + len + 1); 719 SvGROW (sv, SvCUR (sv) + len + 1);
669 memcpy (SvPVX (sv) + SvCUR (sv), buf, len); 720 memcpy (SvPVX (sv) + SvCUR (sv), buf, len);
670 SvCUR_set (sv, SvCUR (sv) + len); 721 SvCUR_set (sv, SvCUR (sv) + len);
671 } 722 }
672 else 723 else
673 sv = newSVpvn (buf, len); 724 sv = newSVpvn (buf, len);
725 }
674 } 726 }
675 while (*dec->cur != '"'); 727 while (*dec->cur != '"');
676 728
677 ++dec->cur; 729 ++dec->cur;
678 730
778static SV * 830static SV *
779decode_av (dec_t *dec) 831decode_av (dec_t *dec)
780{ 832{
781 AV *av = newAV (); 833 AV *av = newAV ();
782 834
835 DEC_INC_DEPTH;
783 decode_ws (dec); 836 decode_ws (dec);
837
784 if (*dec->cur == ']') 838 if (*dec->cur == ']')
785 ++dec->cur; 839 ++dec->cur;
786 else 840 else
787 for (;;) 841 for (;;)
788 { 842 {
806 ERR (", or ] expected while parsing array"); 860 ERR (", or ] expected while parsing array");
807 861
808 ++dec->cur; 862 ++dec->cur;
809 } 863 }
810 864
865 DEC_DEC_DEPTH;
811 return newRV_noinc ((SV *)av); 866 return newRV_noinc ((SV *)av);
812 867
813fail: 868fail:
814 SvREFCNT_dec (av); 869 SvREFCNT_dec (av);
870 DEC_DEC_DEPTH;
815 return 0; 871 return 0;
816} 872}
817 873
818static SV * 874static SV *
819decode_hv (dec_t *dec) 875decode_hv (dec_t *dec)
820{ 876{
821 HV *hv = newHV (); 877 HV *hv = newHV ();
822 878
879 DEC_INC_DEPTH;
823 decode_ws (dec); 880 decode_ws (dec);
881
824 if (*dec->cur == '}') 882 if (*dec->cur == '}')
825 ++dec->cur; 883 ++dec->cur;
826 else 884 else
827 for (;;) 885 for (;;)
828 { 886 {
841 { 899 {
842 SvREFCNT_dec (key); 900 SvREFCNT_dec (key);
843 goto fail; 901 goto fail;
844 } 902 }
845 903
846 //TODO: optimise
847 hv_store_ent (hv, key, value, 0); 904 hv_store_ent (hv, key, value, 0);
905 SvREFCNT_dec (key);
848 906
849 decode_ws (dec); 907 decode_ws (dec);
850 908
851 if (*dec->cur == '}') 909 if (*dec->cur == '}')
852 { 910 {
858 ERR (", or } expected while parsing object/hash"); 916 ERR (", or } expected while parsing object/hash");
859 917
860 ++dec->cur; 918 ++dec->cur;
861 } 919 }
862 920
921 DEC_DEC_DEPTH;
863 return newRV_noinc ((SV *)hv); 922 return newRV_noinc ((SV *)hv);
864 923
865fail: 924fail:
866 SvREFCNT_dec (hv); 925 SvREFCNT_dec (hv);
926 DEC_DEC_DEPTH;
867 return 0; 927 return 0;
868} 928}
869 929
870static SV * 930static SV *
871decode_sv (dec_t *dec) 931decode_sv (dec_t *dec)
914 ERR ("'null' expected"); 974 ERR ("'null' expected");
915 975
916 break; 976 break;
917 977
918 default: 978 default:
919 ERR ("malformed json string, neither array, object, number, string or atom"); 979 ERR ("malformed JSON string, neither array, object, number, string or atom");
920 break; 980 break;
921 } 981 }
922 982
923fail: 983fail:
924 return 0; 984 return 0;
925} 985}
926 986
927static SV * 987static SV *
928decode_json (SV *string, UV flags) 988decode_json (SV *string, U32 flags, UV *offset_return)
929{ 989{
990 dec_t dec;
991 UV offset;
930 SV *sv; 992 SV *sv;
993
994 SvGETMAGIC (string);
995 SvUPGRADE (string, SVt_PV);
931 996
932 if (flags & F_UTF8) 997 if (flags & F_UTF8)
933 sv_utf8_downgrade (string, 0); 998 sv_utf8_downgrade (string, 0);
934 else 999 else
935 sv_utf8_upgrade (string); 1000 sv_utf8_upgrade (string);
936 1001
937 SvGROW (string, SvCUR (string) + 1); // should basically be a NOP 1002 SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
938 1003
939 dec_t dec;
940 dec.flags = flags; 1004 dec.flags = flags;
941 dec.cur = SvPVX (string); 1005 dec.cur = SvPVX (string);
942 dec.end = SvEND (string); 1006 dec.end = SvEND (string);
943 dec.err = 0; 1007 dec.err = 0;
1008 dec.depth = 0;
1009 dec.maxdepth = DEC_DEPTH (dec.flags);
944 1010
1011 *dec.end = 0; // this should basically be a nop, too, but make sure it's there
945 sv = decode_sv (&dec); 1012 sv = decode_sv (&dec);
946 1013
1014 if (!(offset_return || !sv))
1015 {
1016 // check for trailing garbage
1017 decode_ws (&dec);
1018
1019 if (*dec.cur)
1020 {
1021 dec.err = "garbage after JSON object";
1022 SvREFCNT_dec (sv);
1023 sv = 0;
1024 }
1025 }
1026
1027 if (offset_return || !sv)
1028 {
1029 offset = dec.flags & F_UTF8
1030 ? dec.cur - SvPVX (string)
1031 : utf8_distance (dec.cur, SvPVX (string));
1032
1033 if (offset_return)
1034 *offset_return = offset;
1035 }
1036
947 if (!sv) 1037 if (!sv)
948 { 1038 {
949 IV offset = dec.flags & F_UTF8
950 ? dec.cur - SvPVX (string)
951 : utf8_distance (dec.cur, SvPVX (string));
952 SV *uni = sv_newmortal (); 1039 SV *uni = sv_newmortal ();
953 1040
954 // horrible hack to silence warning inside pv_uni_display 1041 // horrible hack to silence warning inside pv_uni_display
955 COP cop = *PL_curcop; 1042 COP cop = *PL_curcop;
956 cop.cop_warnings = pWARN_NONE; 1043 cop.cop_warnings = pWARN_NONE;
958 SAVEVPTR (PL_curcop); 1045 SAVEVPTR (PL_curcop);
959 PL_curcop = &cop; 1046 PL_curcop = &cop;
960 pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ); 1047 pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);
961 LEAVE; 1048 LEAVE;
962 1049
963 croak ("%s, at character offset %d (%s)", 1050 croak ("%s, at character offset %d [\"%s\"]",
964 dec.err, 1051 dec.err,
965 (int)offset, 1052 (int)offset,
966 dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)"); 1053 dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
967 } 1054 }
968 1055
982BOOT: 1069BOOT:
983{ 1070{
984 int i; 1071 int i;
985 1072
986 memset (decode_hexdigit, 0xff, 256); 1073 memset (decode_hexdigit, 0xff, 256);
1074
987 for (i = 10; i--; ) 1075 for (i = 0; i < 256; ++i)
988 decode_hexdigit ['0' + i] = i; 1076 decode_hexdigit [i] =
989 1077 i >= '0' && i <= '9' ? i - '0'
990 for (i = 7; i--; ) 1078 : i >= 'a' && i <= 'f' ? i - 'a' + 10
991 { 1079 : i >= 'A' && i <= 'F' ? i - 'A' + 10
992 decode_hexdigit ['a' + i] = 10 + i; 1080 : -1;
993 decode_hexdigit ['A' + i] = 10 + i;
994 }
995 1081
996 json_stash = gv_stashpv ("JSON::XS", 1); 1082 json_stash = gv_stashpv ("JSON::XS", 1);
997} 1083}
998 1084
999PROTOTYPES: DISABLE 1085PROTOTYPES: DISABLE
1005 RETVAL 1091 RETVAL
1006 1092
1007SV *ascii (SV *self, int enable = 1) 1093SV *ascii (SV *self, int enable = 1)
1008 ALIAS: 1094 ALIAS:
1009 ascii = F_ASCII 1095 ascii = F_ASCII
1096 latin1 = F_LATIN1
1010 utf8 = F_UTF8 1097 utf8 = F_UTF8
1011 indent = F_INDENT 1098 indent = F_INDENT
1012 canonical = F_CANONICAL 1099 canonical = F_CANONICAL
1013 space_before = F_SPACE_BEFORE 1100 space_before = F_SPACE_BEFORE
1014 space_after = F_SPACE_AFTER 1101 space_after = F_SPACE_AFTER
1026 RETVAL = newSVsv (self); 1113 RETVAL = newSVsv (self);
1027} 1114}
1028 OUTPUT: 1115 OUTPUT:
1029 RETVAL 1116 RETVAL
1030 1117
1118SV *max_depth (SV *self, UV max_depth = 0x80000000UL)
1119 CODE:
1120{
1121 UV *uv = SvJSON (self);
1122 UV log2 = 0;
1123
1124 if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;
1125
1126 while ((1UL << log2) < max_depth)
1127 ++log2;
1128
1129 *uv = *uv & ~F_MAXDEPTH | (log2 << S_MAXDEPTH);
1130
1131 RETVAL = newSVsv (self);
1132}
1133 OUTPUT:
1134 RETVAL
1135
1031void encode (SV *self, SV *scalar) 1136void encode (SV *self, SV *scalar)
1032 PPCODE: 1137 PPCODE:
1033 XPUSHs (encode_json (scalar, *SvJSON (self))); 1138 XPUSHs (encode_json (scalar, *SvJSON (self)));
1034 1139
1035void decode (SV *self, SV *jsonstr) 1140void decode (SV *self, SV *jsonstr)
1036 PPCODE: 1141 PPCODE:
1037 XPUSHs (decode_json (jsonstr, *SvJSON (self))); 1142 XPUSHs (decode_json (jsonstr, *SvJSON (self), 0));
1143
1144void decode_prefix (SV *self, SV *jsonstr)
1145 PPCODE:
1146{
1147 UV offset;
1148 EXTEND (SP, 2);
1149 PUSHs (decode_json (jsonstr, *SvJSON (self), &offset));
1150 PUSHs (sv_2mortal (newSVuv (offset)));
1151}
1038 1152
1039PROTOTYPES: ENABLE 1153PROTOTYPES: ENABLE
1040 1154
1041void to_json (SV *scalar) 1155void to_json (SV *scalar)
1042 ALIAS: 1156 ALIAS:
1043 objToJson = 0 1157 objToJson = 0
1044 PPCODE: 1158 PPCODE:
1045 XPUSHs (encode_json (scalar, F_UTF8)); 1159 XPUSHs (encode_json (scalar, F_DEFAULT | F_UTF8));
1046 1160
1047void from_json (SV *jsonstr) 1161void from_json (SV *jsonstr)
1048 ALIAS: 1162 ALIAS:
1049 jsonToObj = 0 1163 jsonToObj = 0
1050 PPCODE: 1164 PPCODE:
1051 XPUSHs (decode_json (jsonstr, F_UTF8)); 1165 XPUSHs (decode_json (jsonstr, F_DEFAULT | F_UTF8, 0));
1052 1166

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