-
Notifications
You must be signed in to change notification settings - Fork 21
/
picojson.h
1183 lines (1096 loc) · 32.2 KB
/
picojson.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Copyright 2009-2010 Cybozu Labs, Inc.
* Copyright 2011-2014 Kazuho Oku
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef picojson_h
#define picojson_h
#include <algorithm>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cstddef>
#include <iostream>
#include <iterator>
#include <limits>
#include <map>
#include <stdexcept>
#include <string>
#include <vector>
#include <utility>
#define PICOJSON_USE_INT64 true
// for isnan/isinf
#if __cplusplus >= 201103L
#include <cmath>
#else
extern "C" {
#ifdef _MSC_VER
#include <float.h>
#elif defined(__INTEL_COMPILER)
#include <mathimf.h>
#else
#include <math.h>
#endif
}
#endif
#ifndef PICOJSON_USE_RVALUE_REFERENCE
#if (defined(__cpp_rvalue_references) && __cpp_rvalue_references >= 200610) || (defined(_MSC_VER) && _MSC_VER >= 1600)
#define PICOJSON_USE_RVALUE_REFERENCE 1
#else
#define PICOJSON_USE_RVALUE_REFERENCE 0
#endif
#endif // PICOJSON_USE_RVALUE_REFERENCE
#ifndef PICOJSON_NOEXCEPT
#if PICOJSON_USE_RVALUE_REFERENCE
#define PICOJSON_NOEXCEPT noexcept
#else
#define PICOJSON_NOEXCEPT throw()
#endif
#endif
// experimental support for int64_t (see README.mkdn for detail)
#ifdef PICOJSON_USE_INT64
#define __STDC_FORMAT_MACROS
#include <errno.h>
#include <inttypes.h>
#endif
// to disable the use of localeconv(3), set PICOJSON_USE_LOCALE to 0
#ifndef PICOJSON_USE_LOCALE
#define PICOJSON_USE_LOCALE 1
#endif
#if PICOJSON_USE_LOCALE
extern "C" {
#include <locale.h>
}
#endif
#ifndef PICOJSON_ASSERT
#define PICOJSON_ASSERT(e) \
do { \
if (!(e)) \
throw std::runtime_error(#e); \
} while (0)
#endif
#ifdef _MSC_VER
#define SNPRINTF _snprintf_s
#pragma warning(push)
#pragma warning(disable : 4244) // conversion from int to char
#pragma warning(disable : 4127) // conditional expression is constant
#pragma warning(disable : 4702) // unreachable code
#else
#define SNPRINTF snprintf
#endif
namespace picojson {
enum {
null_type,
boolean_type,
number_type,
string_type,
array_type,
object_type
#ifdef PICOJSON_USE_INT64
,
int64_type
#endif
};
enum { INDENT_WIDTH = 2 };
struct null {};
class value {
public:
typedef std::vector<value> array;
typedef std::map<std::string, value> object;
union _storage {
bool boolean_;
double number_;
#ifdef PICOJSON_USE_INT64
int64_t int64_;
#endif
std::string *string_;
array *array_;
object *object_;
};
protected:
int type_;
_storage u_;
public:
value();
value(int type, bool);
explicit value(bool b);
#ifdef PICOJSON_USE_INT64
explicit value(int64_t i);
#endif
explicit value(double n);
explicit value(const std::string &s);
explicit value(const array &a);
explicit value(const object &o);
#if PICOJSON_USE_RVALUE_REFERENCE
explicit value(std::string &&s);
explicit value(array &&a);
explicit value(object &&o);
#endif
explicit value(const char *s);
value(const char *s, size_t len);
~value();
value(const value &x);
value &operator=(const value &x);
#if PICOJSON_USE_RVALUE_REFERENCE
value(value &&x) PICOJSON_NOEXCEPT;
value &operator=(value &&x) PICOJSON_NOEXCEPT;
#endif
void swap(value &x) PICOJSON_NOEXCEPT;
template <typename T> bool is() const;
template <typename T> const T &get() const;
template <typename T> T &get();
template <typename T> void set(const T &);
#if PICOJSON_USE_RVALUE_REFERENCE
template <typename T> void set(T &&);
#endif
bool evaluate_as_boolean() const;
const value &get(const size_t idx) const;
const value &get(const std::string &key) const;
value &get(const size_t idx);
value &get(const std::string &key);
bool contains(const size_t idx) const;
bool contains(const std::string &key) const;
std::string to_str() const;
template <typename Iter> void serialize(Iter os, bool prettify = false) const;
std::string serialize(bool prettify = false) const;
private:
template <typename T> value(const T *); // intentionally defined to block implicit conversion of pointer to bool
template <typename Iter> static void _indent(Iter os, int indent);
template <typename Iter> void _serialize(Iter os, int indent) const;
std::string _serialize(int indent) const;
void clear();
};
typedef value::array array;
typedef value::object object;
inline value::value() : type_(null_type), u_() {
}
inline value::value(int type, bool) : type_(type), u_() {
switch (type) {
#define INIT(p, v) \
case p##type: \
u_.p = v; \
break
INIT(boolean_, false);
INIT(number_, 0.0);
#ifdef PICOJSON_USE_INT64
INIT(int64_, 0);
#endif
INIT(string_, new std::string());
INIT(array_, new array());
INIT(object_, new object());
#undef INIT
default:
break;
}
}
inline value::value(bool b) : type_(boolean_type), u_() {
u_.boolean_ = b;
}
#ifdef PICOJSON_USE_INT64
inline value::value(int64_t i) : type_(int64_type), u_() {
u_.int64_ = i;
}
#endif
inline value::value(double n) : type_(number_type), u_() {
if (
#ifdef _MSC_VER
!_finite(n)
#elif __cplusplus >= 201103L || !(defined(isnan) && defined(isinf))
std::isnan(n) || std::isinf(n)
#else
isnan(n) || isinf(n)
#endif
) {
throw std::overflow_error("");
}
u_.number_ = n;
}
inline value::value(const std::string &s) : type_(string_type), u_() {
u_.string_ = new std::string(s);
}
inline value::value(const array &a) : type_(array_type), u_() {
u_.array_ = new array(a);
}
inline value::value(const object &o) : type_(object_type), u_() {
u_.object_ = new object(o);
}
#if PICOJSON_USE_RVALUE_REFERENCE
inline value::value(std::string &&s) : type_(string_type), u_() {
u_.string_ = new std::string(std::move(s));
}
inline value::value(array &&a) : type_(array_type), u_() {
u_.array_ = new array(std::move(a));
}
inline value::value(object &&o) : type_(object_type), u_() {
u_.object_ = new object(std::move(o));
}
#endif
inline value::value(const char *s) : type_(string_type), u_() {
u_.string_ = new std::string(s);
}
inline value::value(const char *s, size_t len) : type_(string_type), u_() {
u_.string_ = new std::string(s, len);
}
inline void value::clear() {
switch (type_) {
#define DEINIT(p) \
case p##type: \
delete u_.p; \
break
DEINIT(string_);
DEINIT(array_);
DEINIT(object_);
#undef DEINIT
default:
break;
}
}
inline value::~value() {
clear();
}
inline value::value(const value &x) : type_(x.type_), u_() {
switch (type_) {
#define INIT(p, v) \
case p##type: \
u_.p = v; \
break
INIT(string_, new std::string(*x.u_.string_));
INIT(array_, new array(*x.u_.array_));
INIT(object_, new object(*x.u_.object_));
#undef INIT
default:
u_ = x.u_;
break;
}
}
inline value &value::operator=(const value &x) {
if (this != &x) {
value t(x);
swap(t);
}
return *this;
}
#if PICOJSON_USE_RVALUE_REFERENCE
inline value::value(value &&x) PICOJSON_NOEXCEPT : type_(null_type), u_() {
swap(x);
}
inline value &value::operator=(value &&x) PICOJSON_NOEXCEPT {
swap(x);
return *this;
}
#endif
inline void value::swap(value &x) PICOJSON_NOEXCEPT {
std::swap(type_, x.type_);
std::swap(u_, x.u_);
}
#define IS(ctype, jtype) \
template <> inline bool value::is<ctype>() const { \
return type_ == jtype##_type; \
}
IS(null, null)
IS(bool, boolean)
#ifdef PICOJSON_USE_INT64
IS(int64_t, int64)
#endif
IS(std::string, string)
IS(array, array)
IS(object, object)
#undef IS
template <> inline bool value::is<double>() const {
return type_ == number_type
#ifdef PICOJSON_USE_INT64
|| type_ == int64_type
#endif
;
}
#define GET(ctype, var) \
template <> inline const ctype &value::get<ctype>() const { \
PICOJSON_ASSERT("type mismatch! call is<type>() before get<type>()" && is<ctype>()); \
return var; \
} \
template <> inline ctype &value::get<ctype>() { \
PICOJSON_ASSERT("type mismatch! call is<type>() before get<type>()" && is<ctype>()); \
return var; \
}
GET(bool, u_.boolean_)
GET(std::string, *u_.string_)
GET(array, *u_.array_)
GET(object, *u_.object_)
#ifdef PICOJSON_USE_INT64
GET(double,
(type_ == int64_type && (const_cast<value *>(this)->type_ = number_type, const_cast<value *>(this)->u_.number_ = u_.int64_),
u_.number_))
GET(int64_t, u_.int64_)
#else
GET(double, u_.number_)
#endif
#undef GET
#define SET(ctype, jtype, setter) \
template <> inline void value::set<ctype>(const ctype &_val) { \
clear(); \
type_ = jtype##_type; \
setter \
}
SET(bool, boolean, u_.boolean_ = _val;)
SET(std::string, string, u_.string_ = new std::string(_val);)
SET(array, array, u_.array_ = new array(_val);)
SET(object, object, u_.object_ = new object(_val);)
SET(double, number, u_.number_ = _val;)
#ifdef PICOJSON_USE_INT64
SET(int64_t, int64, u_.int64_ = _val;)
#endif
#undef SET
#if PICOJSON_USE_RVALUE_REFERENCE
#define MOVESET(ctype, jtype, setter) \
template <> inline void value::set<ctype>(ctype && _val) { \
clear(); \
type_ = jtype##_type; \
setter \
}
MOVESET(std::string, string, u_.string_ = new std::string(std::move(_val));)
MOVESET(array, array, u_.array_ = new array(std::move(_val));)
MOVESET(object, object, u_.object_ = new object(std::move(_val));)
#undef MOVESET
#endif
inline bool value::evaluate_as_boolean() const {
switch (type_) {
case null_type:
return false;
case boolean_type:
return u_.boolean_;
case number_type:
return u_.number_ != 0;
#ifdef PICOJSON_USE_INT64
case int64_type:
return u_.int64_ != 0;
#endif
case string_type:
return !u_.string_->empty();
default:
return true;
}
}
inline const value &value::get(const size_t idx) const {
static value s_null;
PICOJSON_ASSERT(is<array>());
return idx < u_.array_->size() ? (*u_.array_)[idx] : s_null;
}
inline value &value::get(const size_t idx) {
static value s_null;
PICOJSON_ASSERT(is<array>());
return idx < u_.array_->size() ? (*u_.array_)[idx] : s_null;
}
inline const value &value::get(const std::string &key) const {
static value s_null;
PICOJSON_ASSERT(is<object>());
object::const_iterator i = u_.object_->find(key);
return i != u_.object_->end() ? i->second : s_null;
}
inline value &value::get(const std::string &key) {
static value s_null;
PICOJSON_ASSERT(is<object>());
object::iterator i = u_.object_->find(key);
return i != u_.object_->end() ? i->second : s_null;
}
inline bool value::contains(const size_t idx) const {
PICOJSON_ASSERT(is<array>());
return idx < u_.array_->size();
}
inline bool value::contains(const std::string &key) const {
PICOJSON_ASSERT(is<object>());
object::const_iterator i = u_.object_->find(key);
return i != u_.object_->end();
}
inline std::string value::to_str() const {
switch (type_) {
case null_type:
return "null";
case boolean_type:
return u_.boolean_ ? "true" : "false";
#ifdef PICOJSON_USE_INT64
case int64_type: {
char buf[sizeof("-9223372036854775808")];
SNPRINTF(buf, sizeof(buf), "%" PRId64, u_.int64_);
return buf;
}
#endif
case number_type: {
char buf[256];
double tmp;
SNPRINTF(buf, sizeof(buf), fabs(u_.number_) < (1ULL << 53) && modf(u_.number_, &tmp) == 0 ? "%.f" : "%.17g", u_.number_);
#if PICOJSON_USE_LOCALE
char *decimal_point = localeconv()->decimal_point;
if (strcmp(decimal_point, ".") != 0) {
size_t decimal_point_len = strlen(decimal_point);
for (char *p = buf; *p != '\0'; ++p) {
if (strncmp(p, decimal_point, decimal_point_len) == 0) {
return std::string(buf, p) + "." + (p + decimal_point_len);
}
}
}
#endif
return buf;
}
case string_type:
return *u_.string_;
case array_type:
return "array";
case object_type:
return "object";
default:
PICOJSON_ASSERT(0);
#ifdef _MSC_VER
__assume(0);
#endif
}
return std::string();
}
template <typename Iter> void copy(const std::string &s, Iter oi) {
std::copy(s.begin(), s.end(), oi);
}
template <typename Iter> struct serialize_str_char {
Iter oi;
void operator()(char c) {
switch (c) {
#define MAP(val, sym) \
case val: \
copy(sym, oi); \
break
MAP('"', "\\\"");
MAP('\\', "\\\\");
MAP('/', "\\/");
MAP('\b', "\\b");
MAP('\f', "\\f");
MAP('\n', "\\n");
MAP('\r', "\\r");
MAP('\t', "\\t");
#undef MAP
default:
if (static_cast<unsigned char>(c) < 0x20 || c == 0x7f) {
char buf[7];
SNPRINTF(buf, sizeof(buf), "\\u%04x", c & 0xff);
copy(buf, buf + 6, oi);
}
else {
*oi++ = c;
}
break;
}
}
};
template <typename Iter> void serialize_str(const std::string &s, Iter oi) {
*oi++ = '"';
serialize_str_char<Iter> process_char = { oi };
std::for_each(s.begin(), s.end(), process_char);
*oi++ = '"';
}
template <typename Iter> void value::serialize(Iter oi, bool prettify) const {
return _serialize(oi, prettify ? 0 : -1);
}
inline std::string value::serialize(bool prettify) const {
return _serialize(prettify ? 0 : -1);
}
template <typename Iter> void value::_indent(Iter oi, int indent) {
*oi++ = '\n';
for (int i = 0; i < indent * INDENT_WIDTH; ++i) {
*oi++ = ' ';
}
}
template <typename Iter> void value::_serialize(Iter oi, int indent) const {
switch (type_) {
case string_type:
serialize_str(*u_.string_, oi);
break;
case array_type: {
*oi++ = '[';
if (indent != -1) {
++indent;
}
for (array::const_iterator i = u_.array_->begin(); i != u_.array_->end(); ++i) {
if (i != u_.array_->begin()) {
*oi++ = ',';
}
if (indent != -1) {
_indent(oi, indent);
}
i->_serialize(oi, indent);
}
if (indent != -1) {
--indent;
if (!u_.array_->empty()) {
_indent(oi, indent);
}
}
*oi++ = ']';
break;
}
case object_type: {
*oi++ = '{';
if (indent != -1) {
++indent;
}
for (object::const_iterator i = u_.object_->begin(); i != u_.object_->end(); ++i) {
if (i != u_.object_->begin()) {
*oi++ = ',';
}
if (indent != -1) {
_indent(oi, indent);
}
serialize_str(i->first, oi);
*oi++ = ':';
if (indent != -1) {
*oi++ = ' ';
}
i->second._serialize(oi, indent);
}
if (indent != -1) {
--indent;
if (!u_.object_->empty()) {
_indent(oi, indent);
}
}
*oi++ = '}';
break;
}
default:
copy(to_str(), oi);
break;
}
if (indent == 0) {
*oi++ = '\n';
}
}
inline std::string value::_serialize(int indent) const {
std::string s;
_serialize(std::back_inserter(s), indent);
return s;
}
template <typename Iter> class input {
protected:
Iter cur_, end_;
bool consumed_;
int line_;
public:
input(const Iter &first, const Iter &last) : cur_(first), end_(last), consumed_(false), line_(1) {
}
int getc() {
if (consumed_) {
if (*cur_ == '\n') {
++line_;
}
++cur_;
}
if (cur_ == end_) {
consumed_ = false;
return -1;
}
consumed_ = true;
return *cur_ & 0xff;
}
void ungetc() {
consumed_ = false;
}
Iter cur() const {
if (consumed_) {
input<Iter> *self = const_cast<input<Iter> *>(this);
self->consumed_ = false;
++self->cur_;
}
return cur_;
}
int line() const {
return line_;
}
void skip_ws() {
while (1) {
int ch = getc();
if (!(ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r')) {
ungetc();
break;
}
}
}
bool expect(const int expected) {
skip_ws();
if (getc() != expected) {
ungetc();
return false;
}
return true;
}
bool match(const std::string &pattern) {
for (std::string::const_iterator pi(pattern.begin()); pi != pattern.end(); ++pi) {
if (getc() != *pi) {
ungetc();
return false;
}
}
return true;
}
};
template <typename Iter> inline int _parse_quadhex(input<Iter> &in) {
int uni_ch = 0, hex;
for (int i = 0; i < 4; i++) {
if ((hex = in.getc()) == -1) {
return -1;
}
if ('0' <= hex && hex <= '9') {
hex -= '0';
}
else if ('A' <= hex && hex <= 'F') {
hex -= 'A' - 0xa;
}
else if ('a' <= hex && hex <= 'f') {
hex -= 'a' - 0xa;
}
else {
in.ungetc();
return -1;
}
uni_ch = uni_ch * 16 + hex;
}
return uni_ch;
}
template <typename String, typename Iter> inline bool _parse_codepoint(String &out, input<Iter> &in) {
int uni_ch;
if ((uni_ch = _parse_quadhex(in)) == -1) {
return false;
}
if (0xd800 <= uni_ch && uni_ch <= 0xdfff) {
if (0xdc00 <= uni_ch) {
// a second 16-bit of a surrogate pair appeared
return false;
}
// first 16-bit of surrogate pair, get the next one
if (in.getc() != '\\' || in.getc() != 'u') {
in.ungetc();
return false;
}
int second = _parse_quadhex(in);
if (!(0xdc00 <= second && second <= 0xdfff)) {
return false;
}
uni_ch = ((uni_ch - 0xd800) << 10) | ((second - 0xdc00) & 0x3ff);
uni_ch += 0x10000;
}
if (uni_ch < 0x80) {
out.push_back(static_cast<char>(uni_ch));
}
else {
if (uni_ch < 0x800) {
out.push_back(static_cast<char>(0xc0 | (uni_ch >> 6)));
}
else {
if (uni_ch < 0x10000) {
out.push_back(static_cast<char>(0xe0 | (uni_ch >> 12)));
}
else {
out.push_back(static_cast<char>(0xf0 | (uni_ch >> 18)));
out.push_back(static_cast<char>(0x80 | ((uni_ch >> 12) & 0x3f)));
}
out.push_back(static_cast<char>(0x80 | ((uni_ch >> 6) & 0x3f)));
}
out.push_back(static_cast<char>(0x80 | (uni_ch & 0x3f)));
}
return true;
}
template <typename String, typename Iter> inline bool _parse_string(String &out, input<Iter> &in) {
while (1) {
int ch = in.getc();
if (ch < ' ') {
in.ungetc();
return false;
}
else if (ch == '"') {
return true;
}
else if (ch == '\\') {
if ((ch = in.getc()) == -1) {
return false;
}
switch (ch) {
#define MAP(sym, val) \
case sym: \
out.push_back(val); \
break
MAP('"', '\"');
MAP('\\', '\\');
MAP('/', '/');
MAP('b', '\b');
MAP('f', '\f');
MAP('n', '\n');
MAP('r', '\r');
MAP('t', '\t');
#undef MAP
case 'u':
if (!_parse_codepoint(out, in)) {
return false;
}
break;
default:
return false;
}
}
else {
out.push_back(static_cast<char>(ch));
}
}
return false;
}
template <typename Context, typename Iter> inline bool _parse_array(Context &ctx, input<Iter> &in) {
if (!ctx.parse_array_start()) {
return false;
}
size_t idx = 0;
if (in.expect(']')) {
return ctx.parse_array_stop(idx);
}
do {
if (!ctx.parse_array_item(in, idx)) {
return false;
}
idx++;
} while (in.expect(','));
return in.expect(']') && ctx.parse_array_stop(idx);
}
template <typename Context, typename Iter> inline bool _parse_object(Context &ctx, input<Iter> &in) {
if (!ctx.parse_object_start()) {
return false;
}
if (in.expect('}')) {
return true;
}
do {
std::string key;
if (!in.expect('"') || !_parse_string(key, in) || !in.expect(':')) {
return false;
}
if (!ctx.parse_object_item(in, key)) {
return false;
}
} while (in.expect(','));
return in.expect('}');
}
template <typename Iter> inline std::string _parse_number(input<Iter> &in) {
std::string num_str;
while (1) {
int ch = in.getc();
if (('0' <= ch && ch <= '9') || ch == '+' || ch == '-' || ch == 'e' || ch == 'E') {
num_str.push_back(static_cast<char>(ch));
}
else if (ch == '.') {
#if PICOJSON_USE_LOCALE
num_str += localeconv()->decimal_point;
#else
num_str.push_back('.');
#endif
}
else {
in.ungetc();
break;
}
}
return num_str;
}
template <typename Context, typename Iter> inline bool _parse(Context &ctx, input<Iter> &in) {
in.skip_ws();
int ch = in.getc();
switch (ch) {
#define IS(ch, text, op) \
case ch: \
if (in.match(text) && op) { \
return true; \
} else { \
return false; \
}
IS('n', "ull", ctx.set_null());
IS('f', "alse", ctx.set_bool(false));
IS('t', "rue", ctx.set_bool(true));
#undef IS
case '"':
return ctx.parse_string(in);
case '[':
return _parse_array(ctx, in);
case '{':
return _parse_object(ctx, in);
default:
if (('0' <= ch && ch <= '9') || ch == '-') {
double f;
char *endp;
in.ungetc();
std::string num_str(_parse_number(in));
if (num_str.empty()) {
return false;
}
#ifdef PICOJSON_USE_INT64
{
errno = 0;
intmax_t ival = strtoimax(num_str.c_str(), &endp, 10);
if (errno == 0 && std::numeric_limits<int64_t>::min() <= ival && ival <= std::numeric_limits<int64_t>::max() &&
endp == num_str.c_str() + num_str.size()) {
ctx.set_int64(ival);
return true;
}
}
#endif
f = strtod(num_str.c_str(), &endp);
if (endp == num_str.c_str() + num_str.size()) {
ctx.set_number(f);
return true;
}
return false;
}
break;
}
in.ungetc();
return false;
}
class deny_parse_context {
public:
bool set_null() {
return false;
}
bool set_bool(bool) {
return false;
}
#ifdef PICOJSON_USE_INT64
bool set_int64(int64_t) {
return false;
}
#endif
bool set_number(double) {
return false;
}
template <typename Iter> bool parse_string(input<Iter> &) {
return false;
}
bool parse_array_start() {
return false;
}
template <typename Iter> bool parse_array_item(input<Iter> &, size_t) {
return false;
}
bool parse_array_stop(size_t) {
return false;
}
bool parse_object_start() {
return false;
}
template <typename Iter> bool parse_object_item(input<Iter> &, const std::string &) {
return false;
}
};
class default_parse_context {
protected:
value *out_;
public:
default_parse_context(value *out) : out_(out) {
}
bool set_null() {
*out_ = value();
return true;
}
bool set_bool(bool b) {
*out_ = value(b);
return true;
}
#ifdef PICOJSON_USE_INT64
bool set_int64(int64_t i) {
*out_ = value(i);
return true;
}
#endif
bool set_number(double f) {
*out_ = value(f);
return true;
}
template <typename Iter> bool parse_string(input<Iter> &in) {
*out_ = value(string_type, false);
return _parse_string(out_->get<std::string>(), in);