Commit | Line | Data |
3fea05b9 |
1 | package JSON::PP; |
2 | |
3 | # JSON-2.0 |
4 | |
5 | use 5.005; |
6 | use strict; |
7 | use base qw(Exporter); |
8 | use overload; |
9 | |
10 | use Carp (); |
11 | use B (); |
12 | #use Devel::Peek; |
13 | |
14 | $JSON::PP::VERSION = '2.26000'; |
15 | |
16 | @JSON::PP::EXPORT = qw(encode_json decode_json from_json to_json); |
17 | |
18 | # instead of hash-access, i tried index-access for speed. |
19 | # but this method is not faster than what i expected. so it will be changed. |
20 | |
21 | use constant P_ASCII => 0; |
22 | use constant P_LATIN1 => 1; |
23 | use constant P_UTF8 => 2; |
24 | use constant P_INDENT => 3; |
25 | use constant P_CANONICAL => 4; |
26 | use constant P_SPACE_BEFORE => 5; |
27 | use constant P_SPACE_AFTER => 6; |
28 | use constant P_ALLOW_NONREF => 7; |
29 | use constant P_SHRINK => 8; |
30 | use constant P_ALLOW_BLESSED => 9; |
31 | use constant P_CONVERT_BLESSED => 10; |
32 | use constant P_RELAXED => 11; |
33 | |
34 | use constant P_LOOSE => 12; |
35 | use constant P_ALLOW_BIGNUM => 13; |
36 | use constant P_ALLOW_BAREKEY => 14; |
37 | use constant P_ALLOW_SINGLEQUOTE => 15; |
38 | use constant P_ESCAPE_SLASH => 16; |
39 | use constant P_AS_NONBLESSED => 17; |
40 | |
41 | use constant P_ALLOW_UNKNOWN => 18; |
42 | |
43 | BEGIN { |
44 | my @xs_compati_bit_properties = qw( |
45 | latin1 ascii utf8 indent canonical space_before space_after allow_nonref shrink |
46 | allow_blessed convert_blessed relaxed allow_unknown |
47 | ); |
48 | my @pp_bit_properties = qw( |
49 | allow_singlequote allow_bignum loose |
50 | allow_barekey escape_slash as_nonblessed |
51 | ); |
52 | |
53 | # Perl version check, Unicode handling is enable? |
54 | # Helper module sets @JSON::PP::_properties. |
55 | |
56 | my $helper = $] >= 5.008 ? 'JSON::PP58' |
57 | : $] >= 5.006 ? 'JSON::PP56' |
58 | : 'JSON::PP5005' |
59 | ; |
60 | |
61 | eval qq| require $helper |; |
62 | if ($@) { Carp::croak $@; } |
63 | |
64 | for my $name (@xs_compati_bit_properties, @pp_bit_properties) { |
65 | my $flag_name = 'P_' . uc($name); |
66 | |
67 | eval qq/ |
68 | sub $name { |
69 | my \$enable = defined \$_[1] ? \$_[1] : 1; |
70 | |
71 | if (\$enable) { |
72 | \$_[0]->{PROPS}->[$flag_name] = 1; |
73 | } |
74 | else { |
75 | \$_[0]->{PROPS}->[$flag_name] = 0; |
76 | } |
77 | |
78 | \$_[0]; |
79 | } |
80 | |
81 | sub get_$name { |
82 | \$_[0]->{PROPS}->[$flag_name] ? 1 : ''; |
83 | } |
84 | /; |
85 | } |
86 | |
87 | } |
88 | |
89 | |
90 | |
91 | # Functions |
92 | |
93 | my %encode_allow_method |
94 | = map {($_ => 1)} qw/utf8 pretty allow_nonref latin1 self_encode escape_slash |
95 | allow_blessed convert_blessed indent indent_length allow_bignum |
96 | as_nonblessed |
97 | /; |
98 | my %decode_allow_method |
99 | = map {($_ => 1)} qw/utf8 allow_nonref loose allow_singlequote allow_bignum |
100 | allow_barekey max_size relaxed/; |
101 | |
102 | |
103 | my $JSON; # cache |
104 | |
105 | sub encode_json ($) { # encode |
106 | ($JSON ||= __PACKAGE__->new->utf8)->encode(@_); |
107 | } |
108 | |
109 | |
110 | sub decode_json { # decode |
111 | ($JSON ||= __PACKAGE__->new->utf8)->decode(@_); |
112 | } |
113 | |
114 | # Obsoleted |
115 | |
116 | sub to_json($) { |
117 | Carp::croak ("JSON::PP::to_json has been renamed to encode_json."); |
118 | } |
119 | |
120 | |
121 | sub from_json($) { |
122 | Carp::croak ("JSON::PP::from_json has been renamed to decode_json."); |
123 | } |
124 | |
125 | |
126 | # Methods |
127 | |
128 | sub new { |
129 | my $class = shift; |
130 | my $self = { |
131 | max_depth => 512, |
132 | max_size => 0, |
133 | indent => 0, |
134 | FLAGS => 0, |
135 | fallback => sub { encode_error('Invalid value. JSON can only reference.') }, |
136 | indent_length => 3, |
137 | }; |
138 | |
139 | bless $self, $class; |
140 | } |
141 | |
142 | |
143 | sub encode { |
144 | return $_[0]->PP_encode_json($_[1]); |
145 | } |
146 | |
147 | |
148 | sub decode { |
149 | return $_[0]->PP_decode_json($_[1], 0x00000000); |
150 | } |
151 | |
152 | |
153 | sub decode_prefix { |
154 | return $_[0]->PP_decode_json($_[1], 0x00000001); |
155 | } |
156 | |
157 | |
158 | # accessor |
159 | |
160 | |
161 | # pretty printing |
162 | |
163 | sub pretty { |
164 | my ($self, $v) = @_; |
165 | my $enable = defined $v ? $v : 1; |
166 | |
167 | if ($enable) { # indent_length(3) for JSON::XS compatibility |
168 | $self->indent(1)->indent_length(3)->space_before(1)->space_after(1); |
169 | } |
170 | else { |
171 | $self->indent(0)->space_before(0)->space_after(0); |
172 | } |
173 | |
174 | $self; |
175 | } |
176 | |
177 | # etc |
178 | |
179 | sub max_depth { |
180 | my $max = defined $_[1] ? $_[1] : 0x80000000; |
181 | $_[0]->{max_depth} = $max; |
182 | $_[0]; |
183 | } |
184 | |
185 | |
186 | sub get_max_depth { $_[0]->{max_depth}; } |
187 | |
188 | |
189 | sub max_size { |
190 | my $max = defined $_[1] ? $_[1] : 0; |
191 | $_[0]->{max_size} = $max; |
192 | $_[0]; |
193 | } |
194 | |
195 | |
196 | sub get_max_size { $_[0]->{max_size}; } |
197 | |
198 | |
199 | sub filter_json_object { |
200 | $_[0]->{cb_object} = defined $_[1] ? $_[1] : 0; |
201 | $_[0]->{F_HOOK} = ($_[0]->{cb_object} or $_[0]->{cb_sk_object}) ? 1 : 0; |
202 | $_[0]; |
203 | } |
204 | |
205 | sub filter_json_single_key_object { |
206 | if (@_ > 1) { |
207 | $_[0]->{cb_sk_object}->{$_[1]} = $_[2]; |
208 | } |
209 | $_[0]->{F_HOOK} = ($_[0]->{cb_object} or $_[0]->{cb_sk_object}) ? 1 : 0; |
210 | $_[0]; |
211 | } |
212 | |
213 | sub indent_length { |
214 | if (!defined $_[1] or $_[1] > 15 or $_[1] < 0) { |
215 | Carp::carp "The acceptable range of indent_length() is 0 to 15."; |
216 | } |
217 | else { |
218 | $_[0]->{indent_length} = $_[1]; |
219 | } |
220 | $_[0]; |
221 | } |
222 | |
223 | sub get_indent_length { |
224 | $_[0]->{indent_length}; |
225 | } |
226 | |
227 | sub sort_by { |
228 | $_[0]->{sort_by} = defined $_[1] ? $_[1] : 1; |
229 | $_[0]; |
230 | } |
231 | |
232 | sub allow_bigint { |
233 | Carp::carp("allow_bigint() is obsoleted. use allow_bignum() insted."); |
234 | } |
235 | |
236 | ############################### |
237 | |
238 | ### |
239 | ### Perl => JSON |
240 | ### |
241 | |
242 | |
243 | { # Convert |
244 | |
245 | my $max_depth; |
246 | my $indent; |
247 | my $ascii; |
248 | my $latin1; |
249 | my $utf8; |
250 | my $space_before; |
251 | my $space_after; |
252 | my $canonical; |
253 | my $allow_blessed; |
254 | my $convert_blessed; |
255 | |
256 | my $indent_length; |
257 | my $escape_slash; |
258 | my $bignum; |
259 | my $as_nonblessed; |
260 | |
261 | my $depth; |
262 | my $indent_count; |
263 | my $keysort; |
264 | |
265 | |
266 | sub PP_encode_json { |
267 | my $self = shift; |
268 | my $obj = shift; |
269 | |
270 | $indent_count = 0; |
271 | $depth = 0; |
272 | |
273 | my $idx = $self->{PROPS}; |
274 | |
275 | ($ascii, $latin1, $utf8, $indent, $canonical, $space_before, $space_after, $allow_blessed, |
276 | $convert_blessed, $escape_slash, $bignum, $as_nonblessed) |
277 | = @{$idx}[P_ASCII .. P_SPACE_AFTER, P_ALLOW_BLESSED, P_CONVERT_BLESSED, |
278 | P_ESCAPE_SLASH, P_ALLOW_BIGNUM, P_AS_NONBLESSED]; |
279 | |
280 | ($max_depth, $indent_length) = @{$self}{qw/max_depth indent_length/}; |
281 | |
282 | $keysort = $canonical ? sub { $a cmp $b } : undef; |
283 | |
284 | if ($self->{sort_by}) { |
285 | $keysort = ref($self->{sort_by}) eq 'CODE' ? $self->{sort_by} |
286 | : $self->{sort_by} =~ /\D+/ ? $self->{sort_by} |
287 | : sub { $a cmp $b }; |
288 | } |
289 | |
290 | encode_error("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)") |
291 | if(!ref $obj and !$idx->[ P_ALLOW_NONREF ]); |
292 | |
293 | my $str = $self->object_to_json($obj); |
294 | |
295 | $str .= "\n" if ( $indent ); # JSON::XS 2.26 compatible |
296 | |
297 | unless ($ascii or $latin1 or $utf8) { |
298 | utf8::upgrade($str); |
299 | } |
300 | |
301 | if ($idx->[ P_SHRINK ]) { |
302 | utf8::downgrade($str, 1); |
303 | } |
304 | |
305 | return $str; |
306 | } |
307 | |
308 | |
309 | sub object_to_json { |
310 | my ($self, $obj) = @_; |
311 | my $type = ref($obj); |
312 | |
313 | if($type eq 'HASH'){ |
314 | return $self->hash_to_json($obj); |
315 | } |
316 | elsif($type eq 'ARRAY'){ |
317 | return $self->array_to_json($obj); |
318 | } |
319 | elsif ($type) { # blessed object? |
320 | if (blessed($obj)) { |
321 | |
322 | return $self->value_to_json($obj) if ( $obj->isa('JSON::PP::Boolean') ); |
323 | |
324 | if ( $convert_blessed and $obj->can('TO_JSON') ) { |
325 | my $result = $obj->TO_JSON(); |
326 | if ( defined $result and $obj eq $result ) { |
327 | encode_error( sprintf( |
328 | "%s::TO_JSON method returned same object as was passed instead of a new one", |
329 | ref $obj |
330 | ) ); |
331 | } |
332 | return $self->object_to_json( $result ); |
333 | } |
334 | |
335 | return "$obj" if ( $bignum and _is_bignum($obj) ); |
336 | return $self->blessed_to_json($obj) if ($allow_blessed and $as_nonblessed); # will be removed. |
337 | |
338 | encode_error( sprintf("encountered object '%s', but neither allow_blessed " |
339 | . "nor convert_blessed settings are enabled", $obj) |
340 | ) unless ($allow_blessed); |
341 | |
342 | return 'null'; |
343 | } |
344 | else { |
345 | return $self->value_to_json($obj); |
346 | } |
347 | } |
348 | else{ |
349 | return $self->value_to_json($obj); |
350 | } |
351 | } |
352 | |
353 | |
354 | sub hash_to_json { |
355 | my ($self, $obj) = @_; |
356 | my ($k,$v); |
357 | my %res; |
358 | |
359 | encode_error("json text or perl structure exceeds maximum nesting level (max_depth set too low?)") |
360 | if (++$depth > $max_depth); |
361 | |
362 | my ($pre, $post) = $indent ? $self->_up_indent() : ('', ''); |
363 | my $del = ($space_before ? ' ' : '') . ':' . ($space_after ? ' ' : ''); |
364 | |
365 | if ( my $tie_class = tied %$obj ) { |
366 | if ( $tie_class->can('TIEHASH') ) { |
367 | $tie_class =~ s/=.+$//; |
368 | tie %res, $tie_class; |
369 | } |
370 | } |
371 | |
372 | # In the old Perl verions, tied hashes in bool context didn't work. |
373 | # So, we can't use such a way (%res ? a : b) |
374 | my $has; |
375 | |
376 | for my $k (keys %$obj) { |
377 | my $v = $obj->{$k}; |
378 | $res{$k} = $self->object_to_json($v) || $self->value_to_json($v); |
379 | $has = 1 unless ( $has ); |
380 | } |
381 | |
382 | --$depth; |
383 | $self->_down_indent() if ($indent); |
384 | |
385 | return '{' . ( $has ? $pre : '' ) # indent |
386 | . ( $has ? join(",$pre", map { utf8::decode($_) if ($] < 5.008); # key for Perl 5.6 |
387 | string_to_json($self, $_) . $del . $res{$_} # key : value |
388 | } _sort( $self, \%res ) |
389 | ) . $post # indent |
390 | : '' |
391 | ) |
392 | . '}'; |
393 | } |
394 | |
395 | |
396 | sub array_to_json { |
397 | my ($self, $obj) = @_; |
398 | my @res; |
399 | |
400 | encode_error("json text or perl structure exceeds maximum nesting level (max_depth set too low?)") |
401 | if (++$depth > $max_depth); |
402 | |
403 | my ($pre, $post) = $indent ? $self->_up_indent() : ('', ''); |
404 | |
405 | if (my $tie_class = tied @$obj) { |
406 | if ( $tie_class->can('TIEARRAY') ) { |
407 | $tie_class =~ s/=.+$//; |
408 | tie @res, $tie_class; |
409 | } |
410 | } |
411 | |
412 | for my $v (@$obj){ |
413 | push @res, $self->object_to_json($v) || $self->value_to_json($v); |
414 | } |
415 | |
416 | --$depth; |
417 | $self->_down_indent() if ($indent); |
418 | |
419 | return '[' . ( @res ? $pre : '' ) . ( @res ? join( ",$pre", @res ) . $post : '' ) . ']'; |
420 | } |
421 | |
422 | |
423 | sub value_to_json { |
424 | my ($self, $value) = @_; |
425 | |
426 | return 'null' if(!defined $value); |
427 | |
428 | my $b_obj = B::svref_2object(\$value); # for round trip problem |
429 | my $flags = $b_obj->FLAGS; |
430 | |
431 | return $value # as is |
432 | if ( ( $flags & B::SVf_IOK or $flags & B::SVp_IOK |
433 | or $flags & B::SVf_NOK or $flags & B::SVp_NOK |
434 | ) and !($flags & B::SVf_POK ) |
435 | ); # SvTYPE is IV or NV? |
436 | |
437 | my $type = ref($value); |
438 | |
439 | if(!$type){ |
440 | return string_to_json($self, $value); |
441 | } |
442 | elsif( blessed($value) and $value->isa('JSON::PP::Boolean') ){ |
443 | return $$value == 1 ? 'true' : 'false'; |
444 | } |
445 | elsif ($type) { |
446 | if ((overload::StrVal($value) =~ /=(\w+)/)[0]) { |
447 | return $self->value_to_json("$value"); |
448 | } |
449 | |
450 | if ($type eq 'SCALAR' and defined $$value) { |
451 | return $$value eq '1' ? 'true' |
452 | : $$value eq '0' ? 'false' |
453 | : $self->{PROPS}->[ P_ALLOW_UNKNOWN ] ? 'null' |
454 | : encode_error("cannot encode reference to scalar"); |
455 | } |
456 | |
457 | if ( $self->{PROPS}->[ P_ALLOW_UNKNOWN ] ) { |
458 | return 'null'; |
459 | } |
460 | else { |
461 | if ( $type eq 'SCALAR' or $type eq 'REF' ) { |
462 | encode_error("cannot encode reference to scalar"); |
463 | } |
464 | else { |
465 | encode_error("encountered $value, but JSON can only represent references to arrays or hashes"); |
466 | } |
467 | } |
468 | |
469 | } |
470 | else { |
471 | return $self->{fallback}->($value) |
472 | if ($self->{fallback} and ref($self->{fallback}) eq 'CODE'); |
473 | return 'null'; |
474 | } |
475 | |
476 | } |
477 | |
478 | |
479 | my %esc = ( |
480 | "\n" => '\n', |
481 | "\r" => '\r', |
482 | "\t" => '\t', |
483 | "\f" => '\f', |
484 | "\b" => '\b', |
485 | "\"" => '\"', |
486 | "\\" => '\\\\', |
487 | "\'" => '\\\'', |
488 | ); |
489 | |
490 | |
491 | sub string_to_json { |
492 | my ($self, $arg) = @_; |
493 | |
494 | $arg =~ s/([\x22\x5c\n\r\t\f\b])/$esc{$1}/g; |
495 | $arg =~ s/\//\\\//g if ($escape_slash); |
496 | $arg =~ s/([\x00-\x08\x0b\x0e-\x1f])/'\\u00' . unpack('H2', $1)/eg; |
497 | |
498 | if ($ascii) { |
499 | $arg = JSON_PP_encode_ascii($arg); |
500 | } |
501 | |
502 | if ($latin1) { |
503 | $arg = JSON_PP_encode_latin1($arg); |
504 | } |
505 | |
506 | if ($utf8) { |
507 | utf8::encode($arg); |
508 | } |
509 | |
510 | return '"' . $arg . '"'; |
511 | } |
512 | |
513 | |
514 | sub blessed_to_json { |
515 | my $b_obj = B::svref_2object($_[1]); |
516 | if ($b_obj->isa('B::HV')) { |
517 | return $_[0]->hash_to_json($_[1]); |
518 | } |
519 | elsif ($b_obj->isa('B::AV')) { |
520 | return $_[0]->array_to_json($_[1]); |
521 | } |
522 | else { |
523 | return 'null'; |
524 | } |
525 | } |
526 | |
527 | |
528 | sub encode_error { |
529 | my $error = shift; |
530 | Carp::croak "$error"; |
531 | } |
532 | |
533 | |
534 | sub _sort { |
535 | my ($self, $res) = @_; |
536 | defined $keysort ? (sort $keysort (keys %$res)) : keys %$res; |
537 | } |
538 | |
539 | |
540 | sub _up_indent { |
541 | my $self = shift; |
542 | my $space = ' ' x $indent_length; |
543 | |
544 | my ($pre,$post) = ('',''); |
545 | |
546 | $post = "\n" . $space x $indent_count; |
547 | |
548 | $indent_count++; |
549 | |
550 | $pre = "\n" . $space x $indent_count; |
551 | |
552 | return ($pre,$post); |
553 | } |
554 | |
555 | |
556 | sub _down_indent { $indent_count--; } |
557 | |
558 | |
559 | sub PP_encode_box { |
560 | { |
561 | depth => $depth, |
562 | indent_count => $indent_count, |
563 | }; |
564 | } |
565 | |
566 | } # Convert |
567 | |
568 | |
569 | sub _encode_ascii { |
570 | join('', |
571 | map { |
572 | $_ <= 127 ? |
573 | chr($_) : |
574 | $_ <= 65535 ? |
575 | sprintf('\u%04x', $_) : sprintf('\u%x\u%x', _encode_surrogates($_)); |
576 | } unpack('U*', $_[0]) |
577 | ); |
578 | } |
579 | |
580 | |
581 | sub _encode_latin1 { |
582 | join('', |
583 | map { |
584 | $_ <= 255 ? |
585 | chr($_) : |
586 | $_ <= 65535 ? |
587 | sprintf('\u%04x', $_) : sprintf('\u%x\u%x', _encode_surrogates($_)); |
588 | } unpack('U*', $_[0]) |
589 | ); |
590 | } |
591 | |
592 | |
593 | sub _encode_surrogates { # from perlunicode |
594 | my $uni = $_[0] - 0x10000; |
595 | return ($uni / 0x400 + 0xD800, $uni % 0x400 + 0xDC00); |
596 | } |
597 | |
598 | |
599 | sub _is_bignum { |
600 | $_[0]->isa('Math::BigInt') or $_[0]->isa('Math::BigFloat'); |
601 | } |
602 | |
603 | |
604 | |
605 | # |
606 | # JSON => Perl |
607 | # |
608 | |
609 | my $max_intsize; |
610 | |
611 | BEGIN { |
612 | my $checkint = 1111; |
613 | for my $d (5..30) { |
614 | $checkint .= 1; |
615 | my $int = eval qq| $checkint |; |
616 | if ($int =~ /[eE]/) { |
617 | $max_intsize = $d - 1; |
618 | last; |
619 | } |
620 | } |
621 | } |
622 | |
623 | { # PARSE |
624 | |
625 | my %escapes = ( # by Jeremy Muhlich <jmuhlich [at] bitflood.org> |
626 | b => "\x8", |
627 | t => "\x9", |
628 | n => "\xA", |
629 | f => "\xC", |
630 | r => "\xD", |
631 | '\\' => '\\', |
632 | '"' => '"', |
633 | '/' => '/', |
634 | ); |
635 | |
636 | my $text; # json data |
637 | my $at; # offset |
638 | my $ch; # 1chracter |
639 | my $len; # text length (changed according to UTF8 or NON UTF8) |
640 | # INTERNAL |
641 | my $depth; # nest counter |
642 | my $encoding; # json text encoding |
643 | my $is_valid_utf8; # temp variable |
644 | my $utf8_len; # utf8 byte length |
645 | # FLAGS |
646 | my $utf8; # must be utf8 |
647 | my $max_depth; # max nest nubmer of objects and arrays |
648 | my $max_size; |
649 | my $relaxed; |
650 | my $cb_object; |
651 | my $cb_sk_object; |
652 | |
653 | my $F_HOOK; |
654 | |
655 | my $allow_bigint; # using Math::BigInt |
656 | my $singlequote; # loosely quoting |
657 | my $loose; # |
658 | my $allow_barekey; # bareKey |
659 | |
660 | # $opt flag |
661 | # 0x00000001 .... decode_prefix |
662 | |
663 | sub PP_decode_json { |
664 | my ($self, $opt); # $opt is an effective flag during this decode_json. |
665 | |
666 | ($self, $text, $opt) = @_; |
667 | |
668 | ($at, $ch, $depth) = (0, '', 0); |
669 | |
670 | if (!defined $text or ref $text) { |
671 | decode_error("malformed text data."); |
672 | } |
673 | |
674 | my $idx = $self->{PROPS}; |
675 | |
676 | ($utf8, $relaxed, $loose, $allow_bigint, $allow_barekey, $singlequote) |
677 | = @{$idx}[P_UTF8, P_RELAXED, P_LOOSE .. P_ALLOW_SINGLEQUOTE]; |
678 | |
679 | if ( $utf8 ) { |
680 | utf8::downgrade( $text, 1 ) or Carp::croak("Wide character in subroutine entry"); |
681 | } |
682 | else { |
683 | utf8::upgrade( $text ); |
684 | } |
685 | |
686 | $len = length $text; |
687 | |
688 | ($max_depth, $max_size, $cb_object, $cb_sk_object, $F_HOOK) |
689 | = @{$self}{qw/max_depth max_size cb_object cb_sk_object F_HOOK/}; |
690 | |
691 | if ($max_size > 1) { |
692 | use bytes; |
693 | my $bytes = length $text; |
694 | decode_error( |
695 | sprintf("attempted decode of JSON text of %s bytes size, but max_size is set to %s" |
696 | , $bytes, $max_size), 1 |
697 | ) if ($bytes > $max_size); |
698 | } |
699 | |
700 | # Currently no effect |
701 | # should use regexp |
702 | my @octets = unpack('C4', $text); |
703 | $encoding = ( $octets[0] and $octets[1]) ? 'UTF-8' |
704 | : (!$octets[0] and $octets[1]) ? 'UTF-16BE' |
705 | : (!$octets[0] and !$octets[1]) ? 'UTF-32BE' |
706 | : ( $octets[2] ) ? 'UTF-16LE' |
707 | : (!$octets[2] ) ? 'UTF-32LE' |
708 | : 'unknown'; |
709 | |
710 | my $result = value(); |
711 | |
712 | if (!$idx->[ P_ALLOW_NONREF ] and !ref $result) { |
713 | decode_error( |
714 | 'JSON text must be an object or array (but found number, string, true, false or null,' |
715 | . ' use allow_nonref to allow this)', 1); |
716 | } |
717 | |
718 | if ($len >= $at) { |
719 | my $consumed = $at - 1; |
720 | white(); |
721 | if ($ch) { |
722 | decode_error("garbage after JSON object") unless ($opt & 0x00000001); |
723 | return ($result, $consumed); |
724 | } |
725 | } |
726 | |
727 | $result; |
728 | } |
729 | |
730 | |
731 | sub next_chr { |
732 | return $ch = undef if($at >= $len); |
733 | $ch = substr($text, $at++, 1); |
734 | } |
735 | |
736 | |
737 | sub value { |
738 | white(); |
739 | return if(!defined $ch); |
740 | return object() if($ch eq '{'); |
741 | return array() if($ch eq '['); |
742 | return string() if($ch eq '"' or ($singlequote and $ch eq "'")); |
743 | return number() if($ch =~ /[0-9]/ or $ch eq '-'); |
744 | return word(); |
745 | } |
746 | |
747 | sub string { |
748 | my ($i, $s, $t, $u); |
749 | my $utf16; |
750 | my $is_utf8; |
751 | |
752 | ($is_valid_utf8, $utf8_len) = ('', 0); |
753 | |
754 | $s = ''; # basically UTF8 flag on |
755 | |
756 | if($ch eq '"' or ($singlequote and $ch eq "'")){ |
757 | my $boundChar = $ch if ($singlequote); |
758 | |
759 | OUTER: while( defined(next_chr()) ){ |
760 | |
761 | if((!$singlequote and $ch eq '"') or ($singlequote and $ch eq $boundChar)){ |
762 | next_chr(); |
763 | |
764 | if ($utf16) { |
765 | decode_error("missing low surrogate character in surrogate pair"); |
766 | } |
767 | |
768 | utf8::decode($s) if($is_utf8); |
769 | |
770 | return $s; |
771 | } |
772 | elsif($ch eq '\\'){ |
773 | next_chr(); |
774 | if(exists $escapes{$ch}){ |
775 | $s .= $escapes{$ch}; |
776 | } |
777 | elsif($ch eq 'u'){ # UNICODE handling |
778 | my $u = ''; |
779 | |
780 | for(1..4){ |
781 | $ch = next_chr(); |
782 | last OUTER if($ch !~ /[0-9a-fA-F]/); |
783 | $u .= $ch; |
784 | } |
785 | |
786 | # U+D800 - U+DBFF |
787 | if ($u =~ /^[dD][89abAB][0-9a-fA-F]{2}/) { # UTF-16 high surrogate? |
788 | $utf16 = $u; |
789 | } |
790 | # U+DC00 - U+DFFF |
791 | elsif ($u =~ /^[dD][c-fC-F][0-9a-fA-F]{2}/) { # UTF-16 low surrogate? |
792 | unless (defined $utf16) { |
793 | decode_error("missing high surrogate character in surrogate pair"); |
794 | } |
795 | $is_utf8 = 1; |
796 | $s .= JSON_PP_decode_surrogates($utf16, $u) || next; |
797 | $utf16 = undef; |
798 | } |
799 | else { |
800 | if (defined $utf16) { |
801 | decode_error("surrogate pair expected"); |
802 | } |
803 | |
804 | if ( ( my $hex = hex( $u ) ) > 127 ) { |
805 | $is_utf8 = 1; |
806 | $s .= JSON_PP_decode_unicode($u) || next; |
807 | } |
808 | else { |
809 | $s .= chr $hex; |
810 | } |
811 | } |
812 | |
813 | } |
814 | else{ |
815 | unless ($loose) { |
816 | decode_error('illegal backslash escape sequence in string'); |
817 | } |
818 | $s .= $ch; |
819 | } |
820 | } |
821 | else{ |
822 | |
823 | if ( ord $ch > 127 ) { |
824 | if ( $utf8 ) { |
825 | unless( $ch = is_valid_utf8($ch) ) { |
826 | $at -= 1; |
827 | decode_error("malformed UTF-8 character in JSON string"); |
828 | } |
829 | else { |
830 | $at += $utf8_len - 1; |
831 | } |
832 | } |
833 | else { |
834 | utf8::encode( $ch ); |
835 | } |
836 | |
837 | $is_utf8 = 1; |
838 | } |
839 | |
840 | if (!$loose) { |
841 | if ($ch =~ /[\x00-\x1f\x22\x5c]/) { # '/' ok |
842 | $at--; |
843 | decode_error('invalid character encountered while parsing JSON string'); |
844 | } |
845 | } |
846 | |
847 | $s .= $ch; |
848 | } |
849 | } |
850 | } |
851 | |
852 | decode_error("unexpected end of string while parsing JSON string"); |
853 | } |
854 | |
855 | |
856 | sub white { |
857 | while( defined $ch ){ |
858 | if($ch le ' '){ |
859 | next_chr(); |
860 | } |
861 | elsif($ch eq '/'){ |
862 | next_chr(); |
863 | if(defined $ch and $ch eq '/'){ |
864 | 1 while(defined(next_chr()) and $ch ne "\n" and $ch ne "\r"); |
865 | } |
866 | elsif(defined $ch and $ch eq '*'){ |
867 | next_chr(); |
868 | while(1){ |
869 | if(defined $ch){ |
870 | if($ch eq '*'){ |
871 | if(defined(next_chr()) and $ch eq '/'){ |
872 | next_chr(); |
873 | last; |
874 | } |
875 | } |
876 | else{ |
877 | next_chr(); |
878 | } |
879 | } |
880 | else{ |
881 | decode_error("Unterminated comment"); |
882 | } |
883 | } |
884 | next; |
885 | } |
886 | else{ |
887 | $at--; |
888 | decode_error("malformed JSON string, neither array, object, number, string or atom"); |
889 | } |
890 | } |
891 | else{ |
892 | if ($relaxed and $ch eq '#') { # correctly? |
893 | pos($text) = $at; |
894 | $text =~ /\G([^\n]*(?:\r\n|\r|\n))/g; |
895 | $at = pos($text); |
896 | next_chr; |
897 | next; |
898 | } |
899 | |
900 | last; |
901 | } |
902 | } |
903 | } |
904 | |
905 | |
906 | sub array { |
907 | my $a = []; |
908 | |
909 | decode_error('json text or perl structure exceeds maximum nesting level (max_depth set too low?)') |
910 | if (++$depth > $max_depth); |
911 | |
912 | next_chr(); |
913 | white(); |
914 | |
915 | if(defined $ch and $ch eq ']'){ |
916 | --$depth; |
917 | next_chr(); |
918 | return $a; |
919 | } |
920 | else { |
921 | while(defined($ch)){ |
922 | push @$a, value(); |
923 | |
924 | white(); |
925 | |
926 | if (!defined $ch) { |
927 | last; |
928 | } |
929 | |
930 | if($ch eq ']'){ |
931 | --$depth; |
932 | next_chr(); |
933 | return $a; |
934 | } |
935 | |
936 | if($ch ne ','){ |
937 | last; |
938 | } |
939 | |
940 | next_chr(); |
941 | white(); |
942 | |
943 | if ($relaxed and $ch eq ']') { |
944 | --$depth; |
945 | next_chr(); |
946 | return $a; |
947 | } |
948 | |
949 | } |
950 | } |
951 | |
952 | decode_error(", or ] expected while parsing array"); |
953 | } |
954 | |
955 | |
956 | sub object { |
957 | my $o = {}; |
958 | my $k; |
959 | |
960 | decode_error('json text or perl structure exceeds maximum nesting level (max_depth set too low?)') |
961 | if (++$depth > $max_depth); |
962 | next_chr(); |
963 | white(); |
964 | |
965 | if(defined $ch and $ch eq '}'){ |
966 | --$depth; |
967 | next_chr(); |
968 | if ($F_HOOK) { |
969 | return _json_object_hook($o); |
970 | } |
971 | return $o; |
972 | } |
973 | else { |
974 | while (defined $ch) { |
975 | $k = ($allow_barekey and $ch ne '"' and $ch ne "'") ? bareKey() : string(); |
976 | white(); |
977 | |
978 | if(!defined $ch or $ch ne ':'){ |
979 | $at--; |
980 | decode_error("':' expected"); |
981 | } |
982 | |
983 | next_chr(); |
984 | $o->{$k} = value(); |
985 | white(); |
986 | |
987 | last if (!defined $ch); |
988 | |
989 | if($ch eq '}'){ |
990 | --$depth; |
991 | next_chr(); |
992 | if ($F_HOOK) { |
993 | return _json_object_hook($o); |
994 | } |
995 | return $o; |
996 | } |
997 | |
998 | if($ch ne ','){ |
999 | last; |
1000 | } |
1001 | |
1002 | next_chr(); |
1003 | white(); |
1004 | |
1005 | if ($relaxed and $ch eq '}') { |
1006 | --$depth; |
1007 | next_chr(); |
1008 | if ($F_HOOK) { |
1009 | return _json_object_hook($o); |
1010 | } |
1011 | return $o; |
1012 | } |
1013 | |
1014 | } |
1015 | |
1016 | } |
1017 | |
1018 | $at--; |
1019 | decode_error(", or } expected while parsing object/hash"); |
1020 | } |
1021 | |
1022 | |
1023 | sub bareKey { # doesn't strictly follow Standard ECMA-262 3rd Edition |
1024 | my $key; |
1025 | while($ch =~ /[^\x00-\x23\x25-\x2F\x3A-\x40\x5B-\x5E\x60\x7B-\x7F]/){ |
1026 | $key .= $ch; |
1027 | next_chr(); |
1028 | } |
1029 | return $key; |
1030 | } |
1031 | |
1032 | |
1033 | sub word { |
1034 | my $word = substr($text,$at-1,4); |
1035 | |
1036 | if($word eq 'true'){ |
1037 | $at += 3; |
1038 | next_chr; |
1039 | return $JSON::PP::true; |
1040 | } |
1041 | elsif($word eq 'null'){ |
1042 | $at += 3; |
1043 | next_chr; |
1044 | return undef; |
1045 | } |
1046 | elsif($word eq 'fals'){ |
1047 | $at += 3; |
1048 | if(substr($text,$at,1) eq 'e'){ |
1049 | $at++; |
1050 | next_chr; |
1051 | return $JSON::PP::false; |
1052 | } |
1053 | } |
1054 | |
1055 | $at--; # for decode_error report |
1056 | |
1057 | decode_error("'null' expected") if ($word =~ /^n/); |
1058 | decode_error("'true' expected") if ($word =~ /^t/); |
1059 | decode_error("'false' expected") if ($word =~ /^f/); |
1060 | decode_error("malformed JSON string, neither array, object, number, string or atom"); |
1061 | } |
1062 | |
1063 | |
1064 | sub number { |
1065 | my $n = ''; |
1066 | my $v; |
1067 | |
1068 | # According to RFC4627, hex or oct digts are invalid. |
1069 | if($ch eq '0'){ |
1070 | my $peek = substr($text,$at,1); |
1071 | my $hex = $peek =~ /[xX]/; # 0 or 1 |
1072 | |
1073 | if($hex){ |
1074 | decode_error("malformed number (leading zero must not be followed by another digit)"); |
1075 | ($n) = ( substr($text, $at+1) =~ /^([0-9a-fA-F]+)/); |
1076 | } |
1077 | else{ # oct |
1078 | ($n) = ( substr($text, $at) =~ /^([0-7]+)/); |
1079 | if (defined $n and length $n > 1) { |
1080 | decode_error("malformed number (leading zero must not be followed by another digit)"); |
1081 | } |
1082 | } |
1083 | |
1084 | if(defined $n and length($n)){ |
1085 | if (!$hex and length($n) == 1) { |
1086 | decode_error("malformed number (leading zero must not be followed by another digit)"); |
1087 | } |
1088 | $at += length($n) + $hex; |
1089 | next_chr; |
1090 | return $hex ? hex($n) : oct($n); |
1091 | } |
1092 | } |
1093 | |
1094 | if($ch eq '-'){ |
1095 | $n = '-'; |
1096 | next_chr; |
1097 | if (!defined $ch or $ch !~ /\d/) { |
1098 | decode_error("malformed number (no digits after initial minus)"); |
1099 | } |
1100 | } |
1101 | |
1102 | while(defined $ch and $ch =~ /\d/){ |
1103 | $n .= $ch; |
1104 | next_chr; |
1105 | } |
1106 | |
1107 | if(defined $ch and $ch eq '.'){ |
1108 | $n .= '.'; |
1109 | |
1110 | next_chr; |
1111 | if (!defined $ch or $ch !~ /\d/) { |
1112 | decode_error("malformed number (no digits after decimal point)"); |
1113 | } |
1114 | else { |
1115 | $n .= $ch; |
1116 | } |
1117 | |
1118 | while(defined(next_chr) and $ch =~ /\d/){ |
1119 | $n .= $ch; |
1120 | } |
1121 | } |
1122 | |
1123 | if(defined $ch and ($ch eq 'e' or $ch eq 'E')){ |
1124 | $n .= $ch; |
1125 | next_chr; |
1126 | |
1127 | if(defined($ch) and ($ch eq '+' or $ch eq '-')){ |
1128 | $n .= $ch; |
1129 | next_chr; |
1130 | if (!defined $ch or $ch =~ /\D/) { |
1131 | decode_error("malformed number (no digits after exp sign)"); |
1132 | } |
1133 | $n .= $ch; |
1134 | } |
1135 | elsif(defined($ch) and $ch =~ /\d/){ |
1136 | $n .= $ch; |
1137 | } |
1138 | else { |
1139 | decode_error("malformed number (no digits after exp sign)"); |
1140 | } |
1141 | |
1142 | while(defined(next_chr) and $ch =~ /\d/){ |
1143 | $n .= $ch; |
1144 | } |
1145 | |
1146 | } |
1147 | |
1148 | $v .= $n; |
1149 | |
1150 | if ($v !~ /[.eE]/ and length $v > $max_intsize) { |
1151 | if ($allow_bigint) { # from Adam Sussman |
1152 | require Math::BigInt; |
1153 | return Math::BigInt->new($v); |
1154 | } |
1155 | else { |
1156 | return "$v"; |
1157 | } |
1158 | } |
1159 | elsif ($allow_bigint) { |
1160 | require Math::BigFloat; |
1161 | return Math::BigFloat->new($v); |
1162 | } |
1163 | |
1164 | return 0+$v; |
1165 | } |
1166 | |
1167 | |
1168 | sub is_valid_utf8 { |
1169 | |
1170 | $utf8_len = $_[0] =~ /[\x00-\x7F]/ ? 1 |
1171 | : $_[0] =~ /[\xC2-\xDF]/ ? 2 |
1172 | : $_[0] =~ /[\xE0-\xEF]/ ? 3 |
1173 | : $_[0] =~ /[\xF0-\xF4]/ ? 4 |
1174 | : 0 |
1175 | ; |
1176 | |
1177 | return unless $utf8_len; |
1178 | |
1179 | my $is_valid_utf8 = substr($text, $at - 1, $utf8_len); |
1180 | |
1181 | return ( $is_valid_utf8 =~ /^(?: |
1182 | [\x00-\x7F] |
1183 | |[\xC2-\xDF][\x80-\xBF] |
1184 | |[\xE0][\xA0-\xBF][\x80-\xBF] |
1185 | |[\xE1-\xEC][\x80-\xBF][\x80-\xBF] |
1186 | |[\xED][\x80-\x9F][\x80-\xBF] |
1187 | |[\xEE-\xEF][\x80-\xBF][\x80-\xBF] |
1188 | |[\xF0][\x90-\xBF][\x80-\xBF][\x80-\xBF] |
1189 | |[\xF1-\xF3][\x80-\xBF][\x80-\xBF][\x80-\xBF] |
1190 | |[\xF4][\x80-\x8F][\x80-\xBF][\x80-\xBF] |
1191 | )$/x ) ? $is_valid_utf8 : ''; |
1192 | } |
1193 | |
1194 | |
1195 | sub decode_error { |
1196 | my $error = shift; |
1197 | my $no_rep = shift; |
1198 | my $str = defined $text ? substr($text, $at) : ''; |
1199 | my $mess = ''; |
1200 | my $type = $] >= 5.008 ? 'U*' |
1201 | : $] < 5.006 ? 'C*' |
1202 | : utf8::is_utf8( $str ) ? 'U*' # 5.6 |
1203 | : 'C*' |
1204 | ; |
1205 | |
1206 | for my $c ( unpack( $type, $str ) ) { # emulate pv_uni_display() ? |
1207 | $mess .= $c == 0x07 ? '\a' |
1208 | : $c == 0x09 ? '\t' |
1209 | : $c == 0x0a ? '\n' |
1210 | : $c == 0x0d ? '\r' |
1211 | : $c == 0x0c ? '\f' |
1212 | : $c < 0x20 ? sprintf('\x{%x}', $c) |
1213 | : $c < 0x80 ? chr($c) |
1214 | : sprintf('\x{%x}', $c) |
1215 | ; |
1216 | if ( length $mess >= 20 ) { |
1217 | $mess .= '...'; |
1218 | last; |
1219 | } |
1220 | } |
1221 | |
1222 | unless ( length $mess ) { |
1223 | $mess = '(end of string)'; |
1224 | } |
1225 | |
1226 | Carp::croak ( |
1227 | $no_rep ? "$error" : "$error, at character offset $at (before \"$mess\")" |
1228 | ); |
1229 | |
1230 | # Carp::croak ( |
1231 | # $no_rep ? "$error" : "$error, at character offset $at [\"$mess\"]" |
1232 | # ); |
1233 | } |
1234 | |
1235 | |
1236 | sub _json_object_hook { |
1237 | my $o = $_[0]; |
1238 | my @ks = keys %{$o}; |
1239 | |
1240 | if ( $cb_sk_object and @ks == 1 and exists $cb_sk_object->{ $ks[0] } and ref $cb_sk_object->{ $ks[0] } ) { |
1241 | my @val = $cb_sk_object->{ $ks[0] }->( $o->{$ks[0]} ); |
1242 | if (@val == 1) { |
1243 | return $val[0]; |
1244 | } |
1245 | } |
1246 | |
1247 | my @val = $cb_object->($o) if ($cb_object); |
1248 | if (@val == 0 or @val > 1) { |
1249 | return $o; |
1250 | } |
1251 | else { |
1252 | return $val[0]; |
1253 | } |
1254 | } |
1255 | |
1256 | |
1257 | sub PP_decode_box { |
1258 | { |
1259 | text => $text, |
1260 | at => $at, |
1261 | ch => $ch, |
1262 | len => $len, |
1263 | depth => $depth, |
1264 | encoding => $encoding, |
1265 | is_valid_utf8 => $is_valid_utf8, |
1266 | }; |
1267 | } |
1268 | |
1269 | } # PARSE |
1270 | |
1271 | |
1272 | sub _decode_surrogates { # from perlunicode |
1273 | my $uni = 0x10000 + (hex($_[0]) - 0xD800) * 0x400 + (hex($_[1]) - 0xDC00); |
1274 | my $un = pack('U*', $uni); |
1275 | utf8::encode( $un ); |
1276 | return $un; |
1277 | } |
1278 | |
1279 | |
1280 | sub _decode_unicode { |
1281 | my $un = pack('U', hex shift); |
1282 | utf8::encode( $un ); |
1283 | return $un; |
1284 | } |
1285 | |
1286 | |
1287 | |
1288 | |
1289 | |
1290 | ############################### |
1291 | # Utilities |
1292 | # |
1293 | |
1294 | BEGIN { |
1295 | eval 'require Scalar::Util'; |
1296 | unless($@){ |
1297 | *JSON::PP::blessed = \&Scalar::Util::blessed; |
1298 | } |
1299 | else{ # This code is from Sclar::Util. |
1300 | # warn $@; |
1301 | eval 'sub UNIVERSAL::a_sub_not_likely_to_be_here { ref($_[0]) }'; |
1302 | *JSON::PP::blessed = sub { |
1303 | local($@, $SIG{__DIE__}, $SIG{__WARN__}); |
1304 | ref($_[0]) ? eval { $_[0]->a_sub_not_likely_to_be_here } : undef; |
1305 | }; |
1306 | } |
1307 | } |
1308 | |
1309 | |
1310 | # shamely copied and modified from JSON::XS code. |
1311 | |
1312 | $JSON::PP::true = do { bless \(my $dummy = 1), "JSON::PP::Boolean" }; |
1313 | $JSON::PP::false = do { bless \(my $dummy = 0), "JSON::PP::Boolean" }; |
1314 | |
1315 | sub is_bool { defined $_[0] and UNIVERSAL::isa($_[0], "JSON::PP::Boolean"); } |
1316 | |
1317 | sub true { $JSON::PP::true } |
1318 | sub false { $JSON::PP::false } |
1319 | sub null { undef; } |
1320 | |
1321 | ############################### |
1322 | |
1323 | package JSON::PP::Boolean; |
1324 | |
1325 | |
1326 | use overload ( |
1327 | "0+" => sub { ${$_[0]} }, |
1328 | "++" => sub { $_[0] = ${$_[0]} + 1 }, |
1329 | "--" => sub { $_[0] = ${$_[0]} - 1 }, |
1330 | fallback => 1, |
1331 | ); |
1332 | |
1333 | |
1334 | ############################### |
1335 | |
1336 | package JSON::PP::IncrParser; |
1337 | |
1338 | use strict; |
1339 | |
1340 | use constant INCR_M_WS => 0; # initial whitespace skipping |
1341 | use constant INCR_M_STR => 1; # inside string |
1342 | use constant INCR_M_BS => 2; # inside backslash |
1343 | use constant INCR_M_JSON => 3; # outside anything, count nesting |
1344 | |
1345 | $JSON::PP::IncrParser::VERSION = '1.01'; |
1346 | |
1347 | my $unpack_format = $] < 5.006 ? 'C*' : 'U*'; |
1348 | |
1349 | sub new { |
1350 | my ( $class ) = @_; |
1351 | |
1352 | bless { |
1353 | incr_nest => 0, |
1354 | incr_text => undef, |
1355 | incr_parsing => 0, |
1356 | incr_p => 0, |
1357 | }, $class; |
1358 | } |
1359 | |
1360 | |
1361 | sub incr_parse { |
1362 | my ( $self, $coder, $text ) = @_; |
1363 | |
1364 | $self->{incr_text} = '' unless ( defined $self->{incr_text} ); |
1365 | |
1366 | if ( defined $text ) { |
1367 | if ( utf8::is_utf8( $text ) and !utf8::is_utf8( $self->{incr_text} ) ) { |
1368 | utf8::upgrade( $self->{incr_text} ) ; |
1369 | utf8::decode( $self->{incr_text} ) ; |
1370 | } |
1371 | $self->{incr_text} .= $text; |
1372 | } |
1373 | |
1374 | |
1375 | my $max_size = $coder->get_max_size; |
1376 | |
1377 | if ( defined wantarray ) { |
1378 | |
1379 | $self->{incr_mode} = INCR_M_WS; |
1380 | |
1381 | if ( wantarray ) { |
1382 | my @ret; |
1383 | |
1384 | $self->{incr_parsing} = 1; |
1385 | |
1386 | do { |
1387 | push @ret, $self->_incr_parse( $coder, $self->{incr_text} ); |
1388 | |
1389 | unless ( !$self->{incr_nest} and $self->{incr_mode} == INCR_M_JSON ) { |
1390 | $self->{incr_mode} = INCR_M_WS; |
1391 | } |
1392 | |
1393 | } until ( !$self->{incr_text} ); |
1394 | |
1395 | $self->{incr_parsing} = 0; |
1396 | |
1397 | return @ret; |
1398 | } |
1399 | else { # in scalar context |
1400 | $self->{incr_parsing} = 1; |
1401 | my $obj = $self->_incr_parse( $coder, $self->{incr_text} ); |
1402 | $self->{incr_parsing} = 0 if defined $obj; # pointed by Martin J. Evans |
1403 | return $obj ? $obj : undef; # $obj is an empty string, parsing was completed. |
1404 | } |
1405 | |
1406 | } |
1407 | |
1408 | } |
1409 | |
1410 | |
1411 | sub _incr_parse { |
1412 | my ( $self, $coder, $text, $skip ) = @_; |
1413 | my $p = $self->{incr_p}; |
1414 | my $restore = $p; |
1415 | |
1416 | my @obj; |
1417 | my $len = length $text; |
1418 | |
1419 | if ( $self->{incr_mode} == INCR_M_WS ) { |
1420 | while ( $len > $p ) { |
1421 | my $s = substr( $text, $p, 1 ); |
1422 | $p++ and next if ( 0x20 >= unpack($unpack_format, $s) ); |
1423 | $self->{incr_mode} = INCR_M_JSON; |
1424 | last; |
1425 | } |
1426 | } |
1427 | |
1428 | while ( $len > $p ) { |
1429 | my $s = substr( $text, $p++, 1 ); |
1430 | |
1431 | if ( $s eq '"' ) { |
1432 | if ( $self->{incr_mode} != INCR_M_STR ) { |
1433 | $self->{incr_mode} = INCR_M_STR; |
1434 | } |
1435 | else { |
1436 | $self->{incr_mode} = INCR_M_JSON; |
1437 | unless ( $self->{incr_nest} ) { |
1438 | last; |
1439 | } |
1440 | } |
1441 | } |
1442 | |
1443 | if ( $self->{incr_mode} == INCR_M_JSON ) { |
1444 | |
1445 | if ( $s eq '[' or $s eq '{' ) { |
1446 | if ( ++$self->{incr_nest} > $coder->get_max_depth ) { |
1447 | Carp::croak('json text or perl structure exceeds maximum nesting level (max_depth set too low?)'); |
1448 | } |
1449 | } |
1450 | elsif ( $s eq ']' or $s eq '}' ) { |
1451 | last if ( --$self->{incr_nest} <= 0 ); |
1452 | } |
1453 | } |
1454 | |
1455 | } |
1456 | |
1457 | $self->{incr_p} = $p; |
1458 | |
1459 | return if ( $self->{incr_mode} == INCR_M_JSON and $self->{incr_nest} > 0 ); |
1460 | |
1461 | return '' unless ( length substr( $self->{incr_text}, 0, $p ) ); |
1462 | |
1463 | local $Carp::CarpLevel = 2; |
1464 | |
1465 | $self->{incr_p} = $restore; |
1466 | $self->{incr_c} = $p; |
1467 | |
1468 | my ( $obj, $tail ) = $coder->decode_prefix( substr( $self->{incr_text}, 0, $p ) ); |
1469 | |
1470 | $self->{incr_text} = substr( $self->{incr_text}, $p ); |
1471 | $self->{incr_p} = 0; |
1472 | |
1473 | return $obj or ''; |
1474 | } |
1475 | |
1476 | |
1477 | sub incr_text { |
1478 | if ( $_[0]->{incr_parsing} ) { |
1479 | Carp::croak("incr_text can not be called when the incremental parser already started parsing"); |
1480 | } |
1481 | $_[0]->{incr_text}; |
1482 | } |
1483 | |
1484 | |
1485 | sub incr_skip { |
1486 | my $self = shift; |
1487 | $self->{incr_text} = substr( $self->{incr_text}, $self->{incr_c} ); |
1488 | $self->{incr_p} = 0; |
1489 | } |
1490 | |
1491 | |
1492 | sub incr_reset { |
1493 | my $self = shift; |
1494 | $self->{incr_text} = undef; |
1495 | $self->{incr_p} = 0; |
1496 | $self->{incr_mode} = 0; |
1497 | $self->{incr_nest} = 0; |
1498 | $self->{incr_parsing} = 0; |
1499 | } |
1500 | |
1501 | ############################### |
1502 | |
1503 | |
1504 | 1; |
1505 | __END__ |
1506 | =pod |
1507 | |
1508 | =head1 NAME |
1509 | |
1510 | JSON::PP - JSON::XS compatible pure-Perl module. |
1511 | |
1512 | =head1 SYNOPSIS |
1513 | |
1514 | use JSON::PP; |
1515 | |
1516 | # exported functions, they croak on error |
1517 | # and expect/generate UTF-8 |
1518 | |
1519 | $utf8_encoded_json_text = encode_json $perl_hash_or_arrayref; |
1520 | $perl_hash_or_arrayref = decode_json $utf8_encoded_json_text; |
1521 | |
1522 | # OO-interface |
1523 | |
1524 | $coder = JSON::PP->new->ascii->pretty->allow_nonref; |
1525 | $pretty_printed_unencoded = $coder->encode ($perl_scalar); |
1526 | $perl_scalar = $coder->decode ($unicode_json_text); |
1527 | |
1528 | # Note that JSON version 2.0 and above will automatically use |
1529 | # JSON::XS or JSON::PP, so you should be able to just: |
1530 | |
1531 | use JSON; |
1532 | |
1533 | =head1 DESCRIPTION |
1534 | |
1535 | This module is L<JSON::XS> compatible pure Perl module. |
1536 | (Perl 5.8 or later is recommended) |
1537 | |
1538 | JSON::XS is the fastest and most proper JSON module on CPAN. |
1539 | It is written by Marc Lehmann in C, so must be compiled and |
1540 | installed in the used environment. |
1541 | |
1542 | JSON::PP is a pure-Perl module and has compatibility to JSON::XS. |
1543 | |
1544 | |
1545 | =head2 FEATURES |
1546 | |
1547 | =over |
1548 | |
1549 | =item * correct unicode handling |
1550 | |
1551 | This module knows how to handle Unicode (depending on Perl version). |
1552 | |
1553 | See to L<JSON::XS/A FEW NOTES ON UNICODE AND PERL> and L<UNICODE HANDLING ON PERLS>. |
1554 | |
1555 | |
1556 | =item * round-trip integrity |
1557 | |
1558 | When you serialise a perl data structure using only datatypes supported by JSON, |
1559 | the deserialised data structure is identical on the Perl level. |
1560 | (e.g. the string "2.0" doesn't suddenly become "2" just because it looks like a number). |
1561 | |
1562 | =item * strict checking of JSON correctness |
1563 | |
1564 | There is no guessing, no generating of illegal JSON texts by default, |
1565 | and only JSON is accepted as input by default (the latter is a security feature). |
1566 | But when some options are set, loose chcking features are available. |
1567 | |
1568 | =back |
1569 | |
1570 | =head1 FUNCTIONS |
1571 | |
1572 | Basically, check to L<JSON> or L<JSON::XS>. |
1573 | |
1574 | =head2 encode_json |
1575 | |
1576 | $json_text = encode_json $perl_scalar |
1577 | |
1578 | =head2 decode_json |
1579 | |
1580 | $perl_scalar = decode_json $json_text |
1581 | |
1582 | =head2 JSON::PP::true |
1583 | |
1584 | Returns JSON true value which is blessed object. |
1585 | It C<isa> JSON::PP::Boolean object. |
1586 | |
1587 | =head2 JSON::PP::false |
1588 | |
1589 | Returns JSON false value which is blessed object. |
1590 | It C<isa> JSON::PP::Boolean object. |
1591 | |
1592 | =head2 JSON::PP::null |
1593 | |
1594 | Returns C<undef>. |
1595 | |
1596 | =head1 METHODS |
1597 | |
1598 | Basically, check to L<JSON> or L<JSON::XS>. |
1599 | |
1600 | =head2 new |
1601 | |
1602 | $json = new JSON::PP |
1603 | |
1604 | Rturns a new JSON::PP object that can be used to de/encode JSON |
1605 | strings. |
1606 | |
1607 | =head2 ascii |
1608 | |
1609 | $json = $json->ascii([$enable]) |
1610 | |
1611 | $enabled = $json->get_ascii |
1612 | |
1613 | If $enable is true (or missing), then the encode method will not generate characters outside |
1614 | the code range 0..127. Any Unicode characters outside that range will be escaped using either |
1615 | a single \uXXXX or a double \uHHHH\uLLLLL escape sequence, as per RFC4627. |
1616 | (See to L<JSON::XS/OBJECT-ORIENTED INTERFACE>). |
1617 | |
1618 | In Perl 5.005, there is no character having high value (more than 255). |
1619 | See to L<UNICODE HANDLING ON PERLS>. |
1620 | |
1621 | If $enable is false, then the encode method will not escape Unicode characters unless |
1622 | required by the JSON syntax or other flags. This results in a faster and more compact format. |
1623 | |
1624 | JSON::PP->new->ascii(1)->encode([chr 0x10401]) |
1625 | => ["\ud801\udc01"] |
1626 | |
1627 | =head2 latin1 |
1628 | |
1629 | $json = $json->latin1([$enable]) |
1630 | |
1631 | $enabled = $json->get_latin1 |
1632 | |
1633 | If $enable is true (or missing), then the encode method will encode the resulting JSON |
1634 | text as latin1 (or iso-8859-1), escaping any characters outside the code range 0..255. |
1635 | |
1636 | If $enable is false, then the encode method will not escape Unicode characters |
1637 | unless required by the JSON syntax or other flags. |
1638 | |
1639 | JSON::XS->new->latin1->encode (["\x{89}\x{abc}"] |
1640 | => ["\x{89}\\u0abc"] # (perl syntax, U+abc escaped, U+89 not) |
1641 | |
1642 | See to L<UNICODE HANDLING ON PERLS>. |
1643 | |
1644 | =head2 utf8 |
1645 | |
1646 | $json = $json->utf8([$enable]) |
1647 | |
1648 | $enabled = $json->get_utf8 |
1649 | |
1650 | If $enable is true (or missing), then the encode method will encode the JSON result |
1651 | into UTF-8, as required by many protocols, while the decode method expects to be handled |
1652 | an UTF-8-encoded string. Please note that UTF-8-encoded strings do not contain any |
1653 | characters outside the range 0..255, they are thus useful for bytewise/binary I/O. |
1654 | |
1655 | (In Perl 5.005, any character outside the range 0..255 does not exist. |
1656 | See to L<UNICODE HANDLING ON PERLS>.) |
1657 | |
1658 | In future versions, enabling this option might enable autodetection of the UTF-16 and UTF-32 |
1659 | encoding families, as described in RFC4627. |
1660 | |
1661 | If $enable is false, then the encode method will return the JSON string as a (non-encoded) |
1662 | Unicode string, while decode expects thus a Unicode string. Any decoding or encoding |
1663 | (e.g. to UTF-8 or UTF-16) needs to be done yourself, e.g. using the Encode module. |
1664 | |
1665 | Example, output UTF-16BE-encoded JSON: |
1666 | |
1667 | use Encode; |
1668 | $jsontext = encode "UTF-16BE", JSON::XS->new->encode ($object); |
1669 | |
1670 | Example, decode UTF-32LE-encoded JSON: |
1671 | |
1672 | use Encode; |
1673 | $object = JSON::XS->new->decode (decode "UTF-32LE", $jsontext); |
1674 | |
1675 | |
1676 | =head2 pretty |
1677 | |
1678 | $json = $json->pretty([$enable]) |
1679 | |
1680 | This enables (or disables) all of the C<indent>, C<space_before> and |
1681 | C<space_after> flags in one call to generate the most readable |
1682 | (or most compact) form possible. |
1683 | |
1684 | =head2 indent |
1685 | |
1686 | $json = $json->indent([$enable]) |
1687 | |
1688 | $enabled = $json->get_indent |
1689 | |
1690 | The default indent space lenght is three. |
1691 | You can use C<indent_length> to change the length. |
1692 | |
1693 | =head2 space_before |
1694 | |
1695 | $json = $json->space_before([$enable]) |
1696 | |
1697 | $enabled = $json->get_space_before |
1698 | |
1699 | =head2 space_after |
1700 | |
1701 | $json = $json->space_after([$enable]) |
1702 | |
1703 | $enabled = $json->get_space_after |
1704 | |
1705 | =head2 relaxed |
1706 | |
1707 | $json = $json->relaxed([$enable]) |
1708 | |
1709 | $enabled = $json->get_relaxed |
1710 | |
1711 | =head2 canonical |
1712 | |
1713 | $json = $json->canonical([$enable]) |
1714 | |
1715 | $enabled = $json->get_canonical |
1716 | |
1717 | If you want your own sorting routine, you can give a code referece |
1718 | or a subroutine name to C<sort_by>. See to C<JSON::PP OWN METHODS>. |
1719 | |
1720 | =head2 allow_nonref |
1721 | |
1722 | $json = $json->allow_nonref([$enable]) |
1723 | |
1724 | $enabled = $json->get_allow_nonref |
1725 | |
1726 | =head2 allow_unknown |
1727 | |
1728 | $json = $json->allow_unknown ([$enable]) |
1729 | |
1730 | $enabled = $json->get_allow_unknown |
1731 | |
1732 | =head2 allow_blessed |
1733 | |
1734 | $json = $json->allow_blessed([$enable]) |
1735 | |
1736 | $enabled = $json->get_allow_blessed |
1737 | |
1738 | =head2 convert_blessed |
1739 | |
1740 | $json = $json->convert_blessed([$enable]) |
1741 | |
1742 | $enabled = $json->get_convert_blessed |
1743 | |
1744 | =head2 filter_json_object |
1745 | |
1746 | $json = $json->filter_json_object([$coderef]) |
1747 | |
1748 | =head2 filter_json_single_key_object |
1749 | |
1750 | $json = $json->filter_json_single_key_object($key [=> $coderef]) |
1751 | |
1752 | =head2 shrink |
1753 | |
1754 | $json = $json->shrink([$enable]) |
1755 | |
1756 | $enabled = $json->get_shrink |
1757 | |
1758 | In JSON::XS, this flag resizes strings generated by either |
1759 | C<encode> or C<decode> to their minimum size possible. |
1760 | It will also try to downgrade any strings to octet-form if possible. |
1761 | |
1762 | In JSON::PP, it is noop about resizing strings but tries |
1763 | C<utf8::downgrade> to the returned string by C<encode>. |
1764 | See to L<utf8>. |
1765 | |
1766 | See to L<JSON::XS/OBJECT-ORIENTED INTERFACE> |
1767 | |
1768 | =head2 max_depth |
1769 | |
1770 | $json = $json->max_depth([$maximum_nesting_depth]) |
1771 | |
1772 | $max_depth = $json->get_max_depth |
1773 | |
1774 | Sets the maximum nesting level (default C<512>) accepted while encoding |
1775 | or decoding. If a higher nesting level is detected in JSON text or a Perl |
1776 | data structure, then the encoder and decoder will stop and croak at that |
1777 | point. |
1778 | |
1779 | Nesting level is defined by number of hash- or arrayrefs that the encoder |
1780 | needs to traverse to reach a given point or the number of C<{> or C<[> |
1781 | characters without their matching closing parenthesis crossed to reach a |
1782 | given character in a string. |
1783 | |
1784 | If no argument is given, the highest possible setting will be used, which |
1785 | is rarely useful. |
1786 | |
1787 | See L<JSON::XS/SSECURITY CONSIDERATIONS> for more info on why this is useful. |
1788 | |
1789 | When a large value (100 or more) was set and it de/encodes a deep nested object/text, |
1790 | it may raise a warning 'Deep recursion on subroutin' at the perl runtime phase. |
1791 | |
1792 | =head2 max_size |
1793 | |
1794 | $json = $json->max_size([$maximum_string_size]) |
1795 | |
1796 | $max_size = $json->get_max_size |
1797 | |
1798 | Set the maximum length a JSON text may have (in bytes) where decoding is |
1799 | being attempted. The default is C<0>, meaning no limit. When C<decode> |
1800 | is called on a string that is longer then this many bytes, it will not |
1801 | attempt to decode the string but throw an exception. This setting has no |
1802 | effect on C<encode> (yet). |
1803 | |
1804 | If no argument is given, the limit check will be deactivated (same as when |
1805 | C<0> is specified). |
1806 | |
1807 | See L<JSON::XS/SSECURITY CONSIDERATIONS> for more info on why this is useful. |
1808 | |
1809 | =head2 encode |
1810 | |
1811 | $json_text = $json->encode($perl_scalar) |
1812 | |
1813 | =head2 decode |
1814 | |
1815 | $perl_scalar = $json->decode($json_text) |
1816 | |
1817 | =head2 decode_prefix |
1818 | |
1819 | ($perl_scalar, $characters) = $json->decode_prefix($json_text) |
1820 | |
1821 | |
1822 | |
1823 | =head1 INCREMENTAL PARSING |
1824 | |
1825 | In JSON::XS 2.2, incremental parsing feature of JSON |
1826 | texts was experimentally implemented. |
1827 | Please check to L<JSON::XS/INCREMENTAL PARSING>. |
1828 | |
1829 | =over 4 |
1830 | |
1831 | =item [void, scalar or list context] = $json->incr_parse ([$string]) |
1832 | |
1833 | This is the central parsing function. It can both append new text and |
1834 | extract objects from the stream accumulated so far (both of these |
1835 | functions are optional). |
1836 | |
1837 | If C<$string> is given, then this string is appended to the already |
1838 | existing JSON fragment stored in the C<$json> object. |
1839 | |
1840 | After that, if the function is called in void context, it will simply |
1841 | return without doing anything further. This can be used to add more text |
1842 | in as many chunks as you want. |
1843 | |
1844 | If the method is called in scalar context, then it will try to extract |
1845 | exactly I<one> JSON object. If that is successful, it will return this |
1846 | object, otherwise it will return C<undef>. If there is a parse error, |
1847 | this method will croak just as C<decode> would do (one can then use |
1848 | C<incr_skip> to skip the errornous part). This is the most common way of |
1849 | using the method. |
1850 | |
1851 | And finally, in list context, it will try to extract as many objects |
1852 | from the stream as it can find and return them, or the empty list |
1853 | otherwise. For this to work, there must be no separators between the JSON |
1854 | objects or arrays, instead they must be concatenated back-to-back. If |
1855 | an error occurs, an exception will be raised as in the scalar context |
1856 | case. Note that in this case, any previously-parsed JSON texts will be |
1857 | lost. |
1858 | |
1859 | =item $lvalue_string = $json->incr_text |
1860 | |
1861 | This method returns the currently stored JSON fragment as an lvalue, that |
1862 | is, you can manipulate it. This I<only> works when a preceding call to |
1863 | C<incr_parse> in I<scalar context> successfully returned an object. Under |
1864 | all other circumstances you must not call this function (I mean it. |
1865 | although in simple tests it might actually work, it I<will> fail under |
1866 | real world conditions). As a special exception, you can also call this |
1867 | method before having parsed anything. |
1868 | |
1869 | This function is useful in two cases: a) finding the trailing text after a |
1870 | JSON object or b) parsing multiple JSON objects separated by non-JSON text |
1871 | (such as commas). |
1872 | |
1873 | In Perl 5.005, C<lvalue> attribute is not available. |
1874 | You must write codes like the below: |
1875 | |
1876 | $string = $json->incr_text; |
1877 | $string =~ s/\s*,\s*//; |
1878 | $json->incr_text( $string ); |
1879 | |
1880 | =item $json->incr_skip |
1881 | |
1882 | This will reset the state of the incremental parser and will remove the |
1883 | parsed text from the input buffer. This is useful after C<incr_parse> |
1884 | died, in which case the input buffer and incremental parser state is left |
1885 | unchanged, to skip the text parsed so far and to reset the parse state. |
1886 | |
1887 | =back |
1888 | |
1889 | |
1890 | |
1891 | =head1 JSON::PP OWN METHODS |
1892 | |
1893 | =head2 allow_singlequote |
1894 | |
1895 | $json = $json->allow_singlequote([$enable]) |
1896 | |
1897 | If C<$enable> is true (or missing), then C<decode> will accept |
1898 | JSON strings quoted by single quotations that are invalid JSON |
1899 | format. |
1900 | |
1901 | $json->allow_singlequote->decode({"foo":'bar'}); |
1902 | $json->allow_singlequote->decode({'foo':"bar"}); |
1903 | $json->allow_singlequote->decode({'foo':'bar'}); |
1904 | |
1905 | As same as the C<relaxed> option, this option may be used to parse |
1906 | application-specific files written by humans. |
1907 | |
1908 | |
1909 | =head2 allow_barekey |
1910 | |
1911 | $json = $json->allow_barekey([$enable]) |
1912 | |
1913 | If C<$enable> is true (or missing), then C<decode> will accept |
1914 | bare keys of JSON object that are invalid JSON format. |
1915 | |
1916 | As same as the C<relaxed> option, this option may be used to parse |
1917 | application-specific files written by humans. |
1918 | |
1919 | $json->allow_barekey->decode('{foo:"bar"}'); |
1920 | |
1921 | =head2 allow_bignum |
1922 | |
1923 | $json = $json->allow_bignum([$enable]) |
1924 | |
1925 | If C<$enable> is true (or missing), then C<decode> will convert |
1926 | the big integer Perl cannot handle as integer into a L<Math::BigInt> |
1927 | object and convert a floating number (any) into a L<Math::BigFloat>. |
1928 | |
1929 | On the contary, C<encode> converts C<Math::BigInt> objects and C<Math::BigFloat> |
1930 | objects into JSON numbers with C<allow_blessed> enable. |
1931 | |
1932 | $json->allow_nonref->allow_blessed->allow_bignum; |
1933 | $bigfloat = $json->decode('2.000000000000000000000000001'); |
1934 | print $json->encode($bigfloat); |
1935 | # => 2.000000000000000000000000001 |
1936 | |
1937 | See to L<JSON::XS/MAPPING> aboout the normal conversion of JSON number. |
1938 | |
1939 | =head2 loose |
1940 | |
1941 | $json = $json->loose([$enable]) |
1942 | |
1943 | The unescaped [\x00-\x1f\x22\x2f\x5c] strings are invalid in JSON strings |
1944 | and the module doesn't allow to C<decode> to these (except for \x2f). |
1945 | If C<$enable> is true (or missing), then C<decode> will accept these |
1946 | unescaped strings. |
1947 | |
1948 | $json->loose->decode(qq|["abc |
1949 | def"]|); |
1950 | |
1951 | See L<JSON::XS/SSECURITY CONSIDERATIONS>. |
1952 | |
1953 | =head2 escape_slash |
1954 | |
1955 | $json = $json->escape_slash([$enable]) |
1956 | |
1957 | According to JSON Grammar, I<slash> (U+002F) is escaped. But default |
1958 | JSON::PP (as same as JSON::XS) encodes strings without escaping slash. |
1959 | |
1960 | If C<$enable> is true (or missing), then C<encode> will escape slashes. |
1961 | |
1962 | =head2 (OBSOLETED)as_nonblessed |
1963 | |
1964 | $json = $json->as_nonblessed |
1965 | |
1966 | (OBSOLETED) If C<$enable> is true (or missing), then C<encode> will convert |
1967 | a blessed hash reference or a blessed array reference (contains |
1968 | other blessed references) into JSON members and arrays. |
1969 | |
1970 | This feature is effective only when C<allow_blessed> is enable. |
1971 | |
1972 | =head2 indent_length |
1973 | |
1974 | $json = $json->indent_length($length) |
1975 | |
1976 | JSON::XS indent space length is 3 and cannot be changed. |
1977 | JSON::PP set the indent space length with the given $length. |
1978 | The default is 3. The acceptable range is 0 to 15. |
1979 | |
1980 | =head2 sort_by |
1981 | |
1982 | $json = $json->sort_by($function_name) |
1983 | $json = $json->sort_by($subroutine_ref) |
1984 | |
1985 | If $function_name or $subroutine_ref are set, its sort routine are used |
1986 | in encoding JSON objects. |
1987 | |
1988 | $js = $pc->sort_by(sub { $JSON::PP::a cmp $JSON::PP::b })->encode($obj); |
1989 | # is($js, q|{"a":1,"b":2,"c":3,"d":4,"e":5,"f":6,"g":7,"h":8,"i":9}|); |
1990 | |
1991 | $js = $pc->sort_by('own_sort')->encode($obj); |
1992 | # is($js, q|{"a":1,"b":2,"c":3,"d":4,"e":5,"f":6,"g":7,"h":8,"i":9}|); |
1993 | |
1994 | sub JSON::PP::own_sort { $JSON::PP::a cmp $JSON::PP::b } |
1995 | |
1996 | As the sorting routine runs in the JSON::PP scope, the given |
1997 | subroutine name and the special variables C<$a>, C<$b> will begin |
1998 | 'JSON::PP::'. |
1999 | |
2000 | If $integer is set, then the effect is same as C<canonical> on. |
2001 | |
2002 | =head1 INTERNAL |
2003 | |
2004 | For developers. |
2005 | |
2006 | =over |
2007 | |
2008 | =item PP_encode_box |
2009 | |
2010 | Returns |
2011 | |
2012 | { |
2013 | depth => $depth, |
2014 | indent_count => $indent_count, |
2015 | } |
2016 | |
2017 | |
2018 | =item PP_decode_box |
2019 | |
2020 | Returns |
2021 | |
2022 | { |
2023 | text => $text, |
2024 | at => $at, |
2025 | ch => $ch, |
2026 | len => $len, |
2027 | depth => $depth, |
2028 | encoding => $encoding, |
2029 | is_valid_utf8 => $is_valid_utf8, |
2030 | }; |
2031 | |
2032 | =back |
2033 | |
2034 | =head1 MAPPING |
2035 | |
2036 | See to L<JSON::XS/MAPPING>. |
2037 | |
2038 | |
2039 | =head1 UNICODE HANDLING ON PERLS |
2040 | |
2041 | If you do not know about Unicode on Perl well, |
2042 | please check L<JSON::XS/A FEW NOTES ON UNICODE AND PERL>. |
2043 | |
2044 | =head2 Perl 5.8 and later |
2045 | |
2046 | Perl can handle Unicode and the JSON::PP de/encode methods also work properly. |
2047 | |
2048 | $json->allow_nonref->encode(chr hex 3042); |
2049 | $json->allow_nonref->encode(chr hex 12345); |
2050 | |
2051 | Reuturns C<"\u3042"> and C<"\ud808\udf45"> respectively. |
2052 | |
2053 | $json->allow_nonref->decode('"\u3042"'); |
2054 | $json->allow_nonref->decode('"\ud808\udf45"'); |
2055 | |
2056 | Returns UTF-8 encoded strings with UTF8 flag, regarded as C<U+3042> and C<U+12345>. |
2057 | |
2058 | Note that the versions from Perl 5.8.0 to 5.8.2, Perl built-in C<join> was broken, |
2059 | so JSON::PP wraps the C<join> with a subroutine. Thus JSON::PP works slow in the versions. |
2060 | |
2061 | |
2062 | =head2 Perl 5.6 |
2063 | |
2064 | Perl can handle Unicode and the JSON::PP de/encode methods also work. |
2065 | |
2066 | =head2 Perl 5.005 |
2067 | |
2068 | Perl 5.005 is a byte sementics world -- all strings are sequences of bytes. |
2069 | That means the unicode handling is not available. |
2070 | |
2071 | In encoding, |
2072 | |
2073 | $json->allow_nonref->encode(chr hex 3042); # hex 3042 is 12354. |
2074 | $json->allow_nonref->encode(chr hex 12345); # hex 12345 is 74565. |
2075 | |
2076 | Returns C<B> and C<E>, as C<chr> takes a value more than 255, it treats |
2077 | as C<$value % 256>, so the above codes are equivalent to : |
2078 | |
2079 | $json->allow_nonref->encode(chr 66); |
2080 | $json->allow_nonref->encode(chr 69); |
2081 | |
2082 | In decoding, |
2083 | |
2084 | $json->decode('"\u00e3\u0081\u0082"'); |
2085 | |
2086 | The returned is a byte sequence C<0xE3 0x81 0x82> for UTF-8 encoded |
2087 | japanese character (C<HIRAGANA LETTER A>). |
2088 | And if it is represented in Unicode code point, C<U+3042>. |
2089 | |
2090 | Next, |
2091 | |
2092 | $json->decode('"\u3042"'); |
2093 | |
2094 | We ordinary expect the returned value is a Unicode character C<U+3042>. |
2095 | But here is 5.005 world. This is C<0xE3 0x81 0x82>. |
2096 | |
2097 | $json->decode('"\ud808\udf45"'); |
2098 | |
2099 | This is not a character C<U+12345> but bytes - C<0xf0 0x92 0x8d 0x85>. |
2100 | |
2101 | |
2102 | =head1 TODO |
2103 | |
2104 | =over |
2105 | |
2106 | =item speed |
2107 | |
2108 | =item memory saving |
2109 | |
2110 | =back |
2111 | |
2112 | |
2113 | =head1 SEE ALSO |
2114 | |
2115 | Most of the document are copied and modified from JSON::XS doc. |
2116 | |
2117 | L<JSON::XS> |
2118 | |
2119 | RFC4627 (L<http://www.ietf.org/rfc/rfc4627.txt>) |
2120 | |
2121 | =head1 AUTHOR |
2122 | |
2123 | Makamaka Hannyaharamitu, E<lt>makamaka[at]cpan.orgE<gt> |
2124 | |
2125 | |
2126 | =head1 COPYRIGHT AND LICENSE |
2127 | |
2128 | Copyright 2007-2009 by Makamaka Hannyaharamitu |
2129 | |
2130 | This library is free software; you can redistribute it and/or modify |
2131 | it under the same terms as Perl itself. |
2132 | |
2133 | =cut |