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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
|
// <bitset> -*- C++ -*-
// Copyright (C) 2001-2015 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
/*
* Copyright (c) 1998
* Silicon Graphics Computer Systems, Inc.
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Silicon Graphics makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*/
/** @file include/bitset
* This is a Standard C++ Library header.
*/
#ifndef _GLIBCXX_BITSET
#define _GLIBCXX_BITSET 1
#pragma GCC system_header
#include <string>
#include <bits/functexcept.h> // For invalid_argument, out_of_range,
// overflow_error
#include <iosfwd>
#include <bits/cxxabi_forced.h>
#define _GLIBCXX_BITSET_BITS_PER_WORD (__CHAR_BIT__ * __SIZEOF_LONG__)
#define _GLIBCXX_BITSET_WORDS(__n) \
((__n) / _GLIBCXX_BITSET_BITS_PER_WORD + \
((__n) % _GLIBCXX_BITSET_BITS_PER_WORD == 0 ? 0 : 1))
#define _GLIBCXX_BITSET_BITS_PER_ULL (__CHAR_BIT__ * __SIZEOF_LONG_LONG__)
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_CONTAINER
/**
* Base class, general case. It is a class invariant that _Nw will be
* nonnegative.
*
* See documentation for bitset.
*/
template<size_t _Nw>
struct _Base_bitset
{
typedef unsigned long _WordT;
/// 0 is the least significant word.
_WordT _M_w[_Nw];
_GLIBCXX_CONSTEXPR _Base_bitset() _GLIBCXX_NOEXCEPT
: _M_w() { }
#if __cplusplus >= 201103L
constexpr _Base_bitset(unsigned long long __val) noexcept
: _M_w{ _WordT(__val)
#if __SIZEOF_LONG_LONG__ > __SIZEOF_LONG__
, _WordT(__val >> _GLIBCXX_BITSET_BITS_PER_WORD)
#endif
} { }
#else
_Base_bitset(unsigned long __val)
: _M_w()
{ _M_w[0] = __val; }
#endif
static _GLIBCXX_CONSTEXPR size_t
_S_whichword(size_t __pos) _GLIBCXX_NOEXCEPT
{ return __pos / _GLIBCXX_BITSET_BITS_PER_WORD; }
static _GLIBCXX_CONSTEXPR size_t
_S_whichbyte(size_t __pos) _GLIBCXX_NOEXCEPT
{ return (__pos % _GLIBCXX_BITSET_BITS_PER_WORD) / __CHAR_BIT__; }
static _GLIBCXX_CONSTEXPR size_t
_S_whichbit(size_t __pos) _GLIBCXX_NOEXCEPT
{ return __pos % _GLIBCXX_BITSET_BITS_PER_WORD; }
static _GLIBCXX_CONSTEXPR _WordT
_S_maskbit(size_t __pos) _GLIBCXX_NOEXCEPT
{ return (static_cast<_WordT>(1)) << _S_whichbit(__pos); }
_WordT&
_M_getword(size_t __pos) _GLIBCXX_NOEXCEPT
{ return _M_w[_S_whichword(__pos)]; }
_GLIBCXX_CONSTEXPR _WordT
_M_getword(size_t __pos) const _GLIBCXX_NOEXCEPT
{ return _M_w[_S_whichword(__pos)]; }
#if __cplusplus >= 201103L
const _WordT*
_M_getdata() const noexcept
{ return _M_w; }
#endif
_WordT&
_M_hiword() _GLIBCXX_NOEXCEPT
{ return _M_w[_Nw - 1]; }
_GLIBCXX_CONSTEXPR _WordT
_M_hiword() const _GLIBCXX_NOEXCEPT
{ return _M_w[_Nw - 1]; }
void
_M_do_and(const _Base_bitset<_Nw>& __x) _GLIBCXX_NOEXCEPT
{
for (size_t __i = 0; __i < _Nw; __i++)
_M_w[__i] &= __x._M_w[__i];
}
void
_M_do_or(const _Base_bitset<_Nw>& __x) _GLIBCXX_NOEXCEPT
{
for (size_t __i = 0; __i < _Nw; __i++)
_M_w[__i] |= __x._M_w[__i];
}
void
_M_do_xor(const _Base_bitset<_Nw>& __x) _GLIBCXX_NOEXCEPT
{
for (size_t __i = 0; __i < _Nw; __i++)
_M_w[__i] ^= __x._M_w[__i];
}
void
_M_do_left_shift(size_t __shift) _GLIBCXX_NOEXCEPT;
void
_M_do_right_shift(size_t __shift) _GLIBCXX_NOEXCEPT;
void
_M_do_flip() _GLIBCXX_NOEXCEPT
{
for (size_t __i = 0; __i < _Nw; __i++)
_M_w[__i] = ~_M_w[__i];
}
void
_M_do_set() _GLIBCXX_NOEXCEPT
{
for (size_t __i = 0; __i < _Nw; __i++)
_M_w[__i] = ~static_cast<_WordT>(0);
}
void
_M_do_reset() _GLIBCXX_NOEXCEPT
{ __builtin_memset(_M_w, 0, _Nw * sizeof(_WordT)); }
bool
_M_is_equal(const _Base_bitset<_Nw>& __x) const _GLIBCXX_NOEXCEPT
{
for (size_t __i = 0; __i < _Nw; ++__i)
if (_M_w[__i] != __x._M_w[__i])
return false;
return true;
}
template<size_t _Nb>
bool
_M_are_all() const _GLIBCXX_NOEXCEPT
{
for (size_t __i = 0; __i < _Nw - 1; __i++)
if (_M_w[__i] != ~static_cast<_WordT>(0))
return false;
return _M_hiword() == (~static_cast<_WordT>(0)
>> (_Nw * _GLIBCXX_BITSET_BITS_PER_WORD
- _Nb));
}
bool
_M_is_any() const _GLIBCXX_NOEXCEPT
{
for (size_t __i = 0; __i < _Nw; __i++)
if (_M_w[__i] != static_cast<_WordT>(0))
return true;
return false;
}
size_t
_M_do_count() const _GLIBCXX_NOEXCEPT
{
size_t __result = 0;
for (size_t __i = 0; __i < _Nw; __i++)
__result += __builtin_popcountl(_M_w[__i]);
return __result;
}
unsigned long
_M_do_to_ulong() const;
#if __cplusplus >= 201103L
unsigned long long
_M_do_to_ullong() const;
#endif
// find first "on" bit
size_t
_M_do_find_first(size_t) const _GLIBCXX_NOEXCEPT;
// find the next "on" bit that follows "prev"
size_t
_M_do_find_next(size_t, size_t) const _GLIBCXX_NOEXCEPT;
};
// Definitions of non-inline functions from _Base_bitset.
template<size_t _Nw>
void
_Base_bitset<_Nw>::_M_do_left_shift(size_t __shift) _GLIBCXX_NOEXCEPT
{
if (__builtin_expect(__shift != 0, 1))
{
const size_t __wshift = __shift / _GLIBCXX_BITSET_BITS_PER_WORD;
const size_t __offset = __shift % _GLIBCXX_BITSET_BITS_PER_WORD;
if (__offset == 0)
for (size_t __n = _Nw - 1; __n >= __wshift; --__n)
_M_w[__n] = _M_w[__n - __wshift];
else
{
const size_t __sub_offset = (_GLIBCXX_BITSET_BITS_PER_WORD
- __offset);
for (size_t __n = _Nw - 1; __n > __wshift; --__n)
_M_w[__n] = ((_M_w[__n - __wshift] << __offset)
| (_M_w[__n - __wshift - 1] >> __sub_offset));
_M_w[__wshift] = _M_w[0] << __offset;
}
std::fill(_M_w + 0, _M_w + __wshift, static_cast<_WordT>(0));
}
}
template<size_t _Nw>
void
_Base_bitset<_Nw>::_M_do_right_shift(size_t __shift) _GLIBCXX_NOEXCEPT
{
if (__builtin_expect(__shift != 0, 1))
{
const size_t __wshift = __shift / _GLIBCXX_BITSET_BITS_PER_WORD;
const size_t __offset = __shift % _GLIBCXX_BITSET_BITS_PER_WORD;
const size_t __limit = _Nw - __wshift - 1;
if (__offset == 0)
for (size_t __n = 0; __n <= __limit; ++__n)
_M_w[__n] = _M_w[__n + __wshift];
else
{
const size_t __sub_offset = (_GLIBCXX_BITSET_BITS_PER_WORD
- __offset);
for (size_t __n = 0; __n < __limit; ++__n)
_M_w[__n] = ((_M_w[__n + __wshift] >> __offset)
| (_M_w[__n + __wshift + 1] << __sub_offset));
_M_w[__limit] = _M_w[_Nw-1] >> __offset;
}
std::fill(_M_w + __limit + 1, _M_w + _Nw, static_cast<_WordT>(0));
}
}
template<size_t _Nw>
unsigned long
_Base_bitset<_Nw>::_M_do_to_ulong() const
{
for (size_t __i = 1; __i < _Nw; ++__i)
if (_M_w[__i])
__throw_overflow_error(__N("_Base_bitset::_M_do_to_ulong"));
return _M_w[0];
}
#if __cplusplus >= 201103L
template<size_t _Nw>
unsigned long long
_Base_bitset<_Nw>::_M_do_to_ullong() const
{
const bool __dw = sizeof(unsigned long long) > sizeof(unsigned long);
for (size_t __i = 1 + __dw; __i < _Nw; ++__i)
if (_M_w[__i])
__throw_overflow_error(__N("_Base_bitset::_M_do_to_ullong"));
if (__dw)
return _M_w[0] + (static_cast<unsigned long long>(_M_w[1])
<< _GLIBCXX_BITSET_BITS_PER_WORD);
return _M_w[0];
}
#endif
template<size_t _Nw>
size_t
_Base_bitset<_Nw>::
_M_do_find_first(size_t __not_found) const _GLIBCXX_NOEXCEPT
{
for (size_t __i = 0; __i < _Nw; __i++)
{
_WordT __thisword = _M_w[__i];
if (__thisword != static_cast<_WordT>(0))
return (__i * _GLIBCXX_BITSET_BITS_PER_WORD
+ __builtin_ctzl(__thisword));
}
// not found, so return an indication of failure.
return __not_found;
}
template<size_t _Nw>
size_t
_Base_bitset<_Nw>::
_M_do_find_next(size_t __prev, size_t __not_found) const _GLIBCXX_NOEXCEPT
{
// make bound inclusive
++__prev;
// check out of bounds
if (__prev >= _Nw * _GLIBCXX_BITSET_BITS_PER_WORD)
return __not_found;
// search first word
size_t __i = _S_whichword(__prev);
_WordT __thisword = _M_w[__i];
// mask off bits below bound
__thisword &= (~static_cast<_WordT>(0)) << _S_whichbit(__prev);
if (__thisword != static_cast<_WordT>(0))
return (__i * _GLIBCXX_BITSET_BITS_PER_WORD
+ __builtin_ctzl(__thisword));
// check subsequent words
__i++;
for (; __i < _Nw; __i++)
{
__thisword = _M_w[__i];
if (__thisword != static_cast<_WordT>(0))
return (__i * _GLIBCXX_BITSET_BITS_PER_WORD
+ __builtin_ctzl(__thisword));
}
// not found, so return an indication of failure.
return __not_found;
} // end _M_do_find_next
/**
* Base class, specialization for a single word.
*
* See documentation for bitset.
*/
template<>
struct _Base_bitset<1>
{
typedef unsigned long _WordT;
_WordT _M_w;
_GLIBCXX_CONSTEXPR _Base_bitset() _GLIBCXX_NOEXCEPT
: _M_w(0)
{ }
#if __cplusplus >= 201103L
constexpr _Base_bitset(unsigned long long __val) noexcept
#else
_Base_bitset(unsigned long __val)
#endif
: _M_w(__val)
{ }
static _GLIBCXX_CONSTEXPR size_t
_S_whichword(size_t __pos) _GLIBCXX_NOEXCEPT
{ return __pos / _GLIBCXX_BITSET_BITS_PER_WORD; }
static _GLIBCXX_CONSTEXPR size_t
_S_whichbyte(size_t __pos) _GLIBCXX_NOEXCEPT
{ return (__pos % _GLIBCXX_BITSET_BITS_PER_WORD) / __CHAR_BIT__; }
static _GLIBCXX_CONSTEXPR size_t
_S_whichbit(size_t __pos) _GLIBCXX_NOEXCEPT
{ return __pos % _GLIBCXX_BITSET_BITS_PER_WORD; }
static _GLIBCXX_CONSTEXPR _WordT
_S_maskbit(size_t __pos) _GLIBCXX_NOEXCEPT
{ return (static_cast<_WordT>(1)) << _S_whichbit(__pos); }
_WordT&
_M_getword(size_t) _GLIBCXX_NOEXCEPT
{ return _M_w; }
_GLIBCXX_CONSTEXPR _WordT
_M_getword(size_t) const _GLIBCXX_NOEXCEPT
{ return _M_w; }
#if __cplusplus >= 201103L
const _WordT*
_M_getdata() const noexcept
{ return &_M_w; }
#endif
_WordT&
_M_hiword() _GLIBCXX_NOEXCEPT
{ return _M_w; }
_GLIBCXX_CONSTEXPR _WordT
_M_hiword() const _GLIBCXX_NOEXCEPT
{ return _M_w; }
void
_M_do_and(const _Base_bitset<1>& __x) _GLIBCXX_NOEXCEPT
{ _M_w &= __x._M_w; }
void
_M_do_or(const _Base_bitset<1>& __x) _GLIBCXX_NOEXCEPT
{ _M_w |= __x._M_w; }
void
_M_do_xor(const _Base_bitset<1>& __x) _GLIBCXX_NOEXCEPT
{ _M_w ^= __x._M_w; }
void
_M_do_left_shift(size_t __shift) _GLIBCXX_NOEXCEPT
{ _M_w <<= __shift; }
void
_M_do_right_shift(size_t __shift) _GLIBCXX_NOEXCEPT
{ _M_w >>= __shift; }
void
_M_do_flip() _GLIBCXX_NOEXCEPT
{ _M_w = ~_M_w; }
void
_M_do_set() _GLIBCXX_NOEXCEPT
{ _M_w = ~static_cast<_WordT>(0); }
void
_M_do_reset() _GLIBCXX_NOEXCEPT
{ _M_w = 0; }
bool
_M_is_equal(const _Base_bitset<1>& __x) const _GLIBCXX_NOEXCEPT
{ return _M_w == __x._M_w; }
template<size_t _Nb>
bool
_M_are_all() const _GLIBCXX_NOEXCEPT
{ return _M_w == (~static_cast<_WordT>(0)
>> (_GLIBCXX_BITSET_BITS_PER_WORD - _Nb)); }
bool
_M_is_any() const _GLIBCXX_NOEXCEPT
{ return _M_w != 0; }
size_t
_M_do_count() const _GLIBCXX_NOEXCEPT
{ return __builtin_popcountl(_M_w); }
unsigned long
_M_do_to_ulong() const _GLIBCXX_NOEXCEPT
{ return _M_w; }
#if __cplusplus >= 201103L
unsigned long long
_M_do_to_ullong() const noexcept
{ return _M_w; }
#endif
size_t
_M_do_find_first(size_t __not_found) const _GLIBCXX_NOEXCEPT
{
if (_M_w != 0)
return __builtin_ctzl(_M_w);
else
return __not_found;
}
// find the next "on" bit that follows "prev"
size_t
_M_do_find_next(size_t __prev, size_t __not_found) const
_GLIBCXX_NOEXCEPT
{
++__prev;
if (__prev >= ((size_t) _GLIBCXX_BITSET_BITS_PER_WORD))
return __not_found;
_WordT __x = _M_w >> __prev;
if (__x != 0)
return __builtin_ctzl(__x) + __prev;
else
return __not_found;
}
};
/**
* Base class, specialization for no storage (zero-length %bitset).
*
* See documentation for bitset.
*/
template<>
struct _Base_bitset<0>
{
typedef unsigned long _WordT;
_GLIBCXX_CONSTEXPR _Base_bitset() _GLIBCXX_NOEXCEPT
{ }
#if __cplusplus >= 201103L
constexpr _Base_bitset(unsigned long long) noexcept
#else
_Base_bitset(unsigned long)
#endif
{ }
static _GLIBCXX_CONSTEXPR size_t
_S_whichword(size_t __pos) _GLIBCXX_NOEXCEPT
{ return __pos / _GLIBCXX_BITSET_BITS_PER_WORD; }
static _GLIBCXX_CONSTEXPR size_t
_S_whichbyte(size_t __pos) _GLIBCXX_NOEXCEPT
{ return (__pos % _GLIBCXX_BITSET_BITS_PER_WORD) / __CHAR_BIT__; }
static _GLIBCXX_CONSTEXPR size_t
_S_whichbit(size_t __pos) _GLIBCXX_NOEXCEPT
{ return __pos % _GLIBCXX_BITSET_BITS_PER_WORD; }
static _GLIBCXX_CONSTEXPR _WordT
_S_maskbit(size_t __pos) _GLIBCXX_NOEXCEPT
{ return (static_cast<_WordT>(1)) << _S_whichbit(__pos); }
// This would normally give access to the data. The bounds-checking
// in the bitset class will prevent the user from getting this far,
// but (1) it must still return an lvalue to compile, and (2) the
// user might call _Unchecked_set directly, in which case this /needs/
// to fail. Let's not penalize zero-length users unless they actually
// make an unchecked call; all the memory ugliness is therefore
// localized to this single should-never-get-this-far function.
_WordT&
_M_getword(size_t) _GLIBCXX_NOEXCEPT
{
__throw_out_of_range(__N("_Base_bitset::_M_getword"));
return *new _WordT;
}
_GLIBCXX_CONSTEXPR _WordT
_M_getword(size_t __pos) const _GLIBCXX_NOEXCEPT
{ return 0; }
_GLIBCXX_CONSTEXPR _WordT
_M_hiword() const _GLIBCXX_NOEXCEPT
{ return 0; }
void
_M_do_and(const _Base_bitset<0>&) _GLIBCXX_NOEXCEPT
{ }
void
_M_do_or(const _Base_bitset<0>&) _GLIBCXX_NOEXCEPT
{ }
void
_M_do_xor(const _Base_bitset<0>&) _GLIBCXX_NOEXCEPT
{ }
void
_M_do_left_shift(size_t) _GLIBCXX_NOEXCEPT
{ }
void
_M_do_right_shift(size_t) _GLIBCXX_NOEXCEPT
{ }
void
_M_do_flip() _GLIBCXX_NOEXCEPT
{ }
void
_M_do_set() _GLIBCXX_NOEXCEPT
{ }
void
_M_do_reset() _GLIBCXX_NOEXCEPT
{ }
// Are all empty bitsets equal to each other? Are they equal to
// themselves? How to compare a thing which has no state? What is
// the sound of one zero-length bitset clapping?
bool
_M_is_equal(const _Base_bitset<0>&) const _GLIBCXX_NOEXCEPT
{ return true; }
template<size_t _Nb>
bool
_M_are_all() const _GLIBCXX_NOEXCEPT
{ return true; }
bool
_M_is_any() const _GLIBCXX_NOEXCEPT
{ return false; }
size_t
_M_do_count() const _GLIBCXX_NOEXCEPT
{ return 0; }
unsigned long
_M_do_to_ulong() const _GLIBCXX_NOEXCEPT
{ return 0; }
#if __cplusplus >= 201103L
unsigned long long
_M_do_to_ullong() const noexcept
{ return 0; }
#endif
// Normally "not found" is the size, but that could also be
// misinterpreted as an index in this corner case. Oh well.
size_t
_M_do_find_first(size_t) const _GLIBCXX_NOEXCEPT
{ return 0; }
size_t
_M_do_find_next(size_t, size_t) const _GLIBCXX_NOEXCEPT
{ return 0; }
};
// Helper class to zero out the unused high-order bits in the highest word.
template<size_t _Extrabits>
struct _Sanitize
{
typedef unsigned long _WordT;
static void
_S_do_sanitize(_WordT& __val) _GLIBCXX_NOEXCEPT
{ __val &= ~((~static_cast<_WordT>(0)) << _Extrabits); }
};
template<>
struct _Sanitize<0>
{
typedef unsigned long _WordT;
static void
_S_do_sanitize(_WordT) _GLIBCXX_NOEXCEPT { }
};
#if __cplusplus >= 201103L
template<size_t _Nb, bool = _Nb < _GLIBCXX_BITSET_BITS_PER_ULL>
struct _Sanitize_val
{
static constexpr unsigned long long
_S_do_sanitize_val(unsigned long long __val)
{ return __val; }
};
template<size_t _Nb>
struct _Sanitize_val<_Nb, true>
{
static constexpr unsigned long long
_S_do_sanitize_val(unsigned long long __val)
{ return __val & ~((~static_cast<unsigned long long>(0)) << _Nb); }
};
#endif
/**
* @class bitset <bitset>
*
* @brief The %bitset class represents a @e fixed-size sequence of bits.
* @ingroup utilities
*
* (Note that %bitset does @e not meet the formal requirements of a
* <a href="tables.html#65">container</a>. Mainly, it lacks iterators.)
*
* The template argument, @a Nb, may be any non-negative number,
* specifying the number of bits (e.g., "0", "12", "1024*1024").
*
* In the general unoptimized case, storage is allocated in word-sized
* blocks. Let B be the number of bits in a word, then (Nb+(B-1))/B
* words will be used for storage. B - Nb%B bits are unused. (They are
* the high-order bits in the highest word.) It is a class invariant
* that those unused bits are always zero.
*
* If you think of %bitset as <em>a simple array of bits</em>, be
* aware that your mental picture is reversed: a %bitset behaves
* the same way as bits in integers do, with the bit at index 0 in
* the <em>least significant / right-hand</em> position, and the bit at
* index Nb-1 in the <em>most significant / left-hand</em> position.
* Thus, unlike other containers, a %bitset's index <em>counts from
* right to left</em>, to put it very loosely.
*
* This behavior is preserved when translating to and from strings. For
* example, the first line of the following program probably prints
* <em>b('a') is 0001100001</em> on a modern ASCII system.
*
* @code
* #include <bitset>
* #include <iostream>
* #include <sstream>
*
* using namespace std;
*
* int main()
* {
* long a = 'a';
* bitset<10> b(a);
*
* cout << "b('a') is " << b << endl;
*
* ostringstream s;
* s << b;
* string str = s.str();
* cout << "index 3 in the string is " << str[3] << " but\n"
* << "index 3 in the bitset is " << b[3] << endl;
* }
* @endcode
*
* Also see:
* https://gcc.gnu.org/onlinedocs/libstdc++/manual/ext_containers.html
* for a description of extensions.
*
* Most of the actual code isn't contained in %bitset<> itself, but in the
* base class _Base_bitset. The base class works with whole words, not with
* individual bits. This allows us to specialize _Base_bitset for the
* important special case where the %bitset is only a single word.
*
* Extra confusion can result due to the fact that the storage for
* _Base_bitset @e is a regular array, and is indexed as such. This is
* carefully encapsulated.
*/
template<size_t _Nb>
class bitset
: private _Base_bitset<_GLIBCXX_BITSET_WORDS(_Nb)>
{
private:
typedef _Base_bitset<_GLIBCXX_BITSET_WORDS(_Nb)> _Base;
typedef unsigned long _WordT;
template<class _CharT, class _Traits, class _Alloc>
void
_M_check_initial_position(const std::basic_string<_CharT, _Traits, _Alloc>& __s,
size_t __position) const
{
if (__position > __s.size())
__throw_out_of_range_fmt(__N("bitset::bitset: __position "
"(which is %zu) > __s.size() "
"(which is %zu)"),
__position, __s.size());
}
void _M_check(size_t __position, const char *__s) const
{
if (__position >= _Nb)
__throw_out_of_range_fmt(__N("%s: __position (which is %zu) "
">= _Nb (which is %zu)"),
__s, __position, _Nb);
}
void
_M_do_sanitize() _GLIBCXX_NOEXCEPT
{
typedef _Sanitize<_Nb % _GLIBCXX_BITSET_BITS_PER_WORD> __sanitize_type;
__sanitize_type::_S_do_sanitize(this->_M_hiword());
}
#if __cplusplus >= 201103L
template<typename> friend struct hash;
#endif
public:
/**
* This encapsulates the concept of a single bit. An instance of this
* class is a proxy for an actual bit; this way the individual bit
* operations are done as faster word-size bitwise instructions.
*
* Most users will never need to use this class directly; conversions
* to and from bool are automatic and should be transparent. Overloaded
* operators help to preserve the illusion.
*
* (On a typical system, this <em>bit %reference</em> is 64
* times the size of an actual bit. Ha.)
*/
class reference
{
friend class bitset;
_WordT* _M_wp;
size_t _M_bpos;
// left undefined
reference();
public:
reference(bitset& __b, size_t __pos) _GLIBCXX_NOEXCEPT
{
_M_wp = &__b._M_getword(__pos);
_M_bpos = _Base::_S_whichbit(__pos);
}
~reference() _GLIBCXX_NOEXCEPT
{ }
// For b[i] = __x;
reference&
operator=(bool __x) _GLIBCXX_NOEXCEPT
{
if (__x)
*_M_wp |= _Base::_S_maskbit(_M_bpos);
else
*_M_wp &= ~_Base::_S_maskbit(_M_bpos);
return *this;
}
// For b[i] = b[__j];
reference&
operator=(const reference& __j) _GLIBCXX_NOEXCEPT
{
if ((*(__j._M_wp) & _Base::_S_maskbit(__j._M_bpos)))
*_M_wp |= _Base::_S_maskbit(_M_bpos);
else
*_M_wp &= ~_Base::_S_maskbit(_M_bpos);
return *this;
}
// Flips the bit
bool
operator~() const _GLIBCXX_NOEXCEPT
{ return (*(_M_wp) & _Base::_S_maskbit(_M_bpos)) == 0; }
// For __x = b[i];
operator bool() const _GLIBCXX_NOEXCEPT
{ return (*(_M_wp) & _Base::_S_maskbit(_M_bpos)) != 0; }
// For b[i].flip();
reference&
flip() _GLIBCXX_NOEXCEPT
{
*_M_wp ^= _Base::_S_maskbit(_M_bpos);
return *this;
}
};
friend class reference;
// 23.3.5.1 constructors:
/// All bits set to zero.
_GLIBCXX_CONSTEXPR bitset() _GLIBCXX_NOEXCEPT
{ }
/// Initial bits bitwise-copied from a single word (others set to zero).
#if __cplusplus >= 201103L
constexpr bitset(unsigned long long __val) noexcept
: _Base(_Sanitize_val<_Nb>::_S_do_sanitize_val(__val)) { }
#else
bitset(unsigned long __val)
: _Base(__val)
{ _M_do_sanitize(); }
#endif
/**
* Use a subset of a string.
* @param __s A string of @a 0 and @a 1 characters.
* @param __position Index of the first character in @a __s to use;
* defaults to zero.
* @throw std::out_of_range If @a pos is bigger the size of @a __s.
* @throw std::invalid_argument If a character appears in the string
* which is neither @a 0 nor @a 1.
*/
template<class _CharT, class _Traits, class _Alloc>
explicit
bitset(const std::basic_string<_CharT, _Traits, _Alloc>& __s,
size_t __position = 0)
: _Base()
{
_M_check_initial_position(__s, __position);
_M_copy_from_string(__s, __position,
std::basic_string<_CharT, _Traits, _Alloc>::npos,
_CharT('0'), _CharT('1'));
}
/**
* Use a subset of a string.
* @param __s A string of @a 0 and @a 1 characters.
* @param __position Index of the first character in @a __s to use.
* @param __n The number of characters to copy.
* @throw std::out_of_range If @a __position is bigger the size
* of @a __s.
* @throw std::invalid_argument If a character appears in the string
* which is neither @a 0 nor @a 1.
*/
template<class _CharT, class _Traits, class _Alloc>
bitset(const std::basic_string<_CharT, _Traits, _Alloc>& __s,
size_t __position, size_t __n)
: _Base()
{
_M_check_initial_position(__s, __position);
_M_copy_from_string(__s, __position, __n, _CharT('0'), _CharT('1'));
}
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 396. what are characters zero and one.
template<class _CharT, class _Traits, class _Alloc>
bitset(const std::basic_string<_CharT, _Traits, _Alloc>& __s,
size_t __position, size_t __n,
_CharT __zero, _CharT __one = _CharT('1'))
: _Base()
{
_M_check_initial_position(__s, __position);
_M_copy_from_string(__s, __position, __n, __zero, __one);
}
#if __cplusplus >= 201103L
/**
* Construct from a character %array.
* @param __str An %array of characters @a zero and @a one.
* @param __n The number of characters to use.
* @param __zero The character corresponding to the value 0.
* @param __one The character corresponding to the value 1.
* @throw std::invalid_argument If a character appears in the string
* which is neither @a __zero nor @a __one.
*/
template<typename _CharT>
explicit
bitset(const _CharT* __str,
typename std::basic_string<_CharT>::size_type __n
= std::basic_string<_CharT>::npos,
_CharT __zero = _CharT('0'), _CharT __one = _CharT('1'))
: _Base()
{
if (!__str)
__throw_logic_error(__N("bitset::bitset(const _CharT*, ...)"));
if (__n == std::basic_string<_CharT>::npos)
__n = std::char_traits<_CharT>::length(__str);
_M_copy_from_ptr<_CharT, std::char_traits<_CharT>>(__str, __n, 0,
__n, __zero,
__one);
}
#endif
// 23.3.5.2 bitset operations:
//@{
/**
* Operations on bitsets.
* @param __rhs A same-sized bitset.
*
* These should be self-explanatory.
*/
bitset<_Nb>&
operator&=(const bitset<_Nb>& __rhs) _GLIBCXX_NOEXCEPT
{
this->_M_do_and(__rhs);
return *this;
}
bitset<_Nb>&
operator|=(const bitset<_Nb>& __rhs) _GLIBCXX_NOEXCEPT
{
this->_M_do_or(__rhs);
return *this;
}
bitset<_Nb>&
operator^=(const bitset<_Nb>& __rhs) _GLIBCXX_NOEXCEPT
{
this->_M_do_xor(__rhs);
return *this;
}
//@}
//@{
/**
* Operations on bitsets.
* @param __position The number of places to shift.
*
* These should be self-explanatory.
*/
bitset<_Nb>&
operator<<=(size_t __position) _GLIBCXX_NOEXCEPT
{
if (__builtin_expect(__position < _Nb, 1))
{
this->_M_do_left_shift(__position);
this->_M_do_sanitize();
}
else
this->_M_do_reset();
return *this;
}
bitset<_Nb>&
operator>>=(size_t __position) _GLIBCXX_NOEXCEPT
{
if (__builtin_expect(__position < _Nb, 1))
{
this->_M_do_right_shift(__position);
this->_M_do_sanitize();
}
else
this->_M_do_reset();
return *this;
}
//@}
//@{
/**
* These versions of single-bit set, reset, flip, and test are
* extensions from the SGI version. They do no range checking.
* @ingroup SGIextensions
*/
bitset<_Nb>&
_Unchecked_set(size_t __pos) _GLIBCXX_NOEXCEPT
{
this->_M_getword(__pos) |= _Base::_S_maskbit(__pos);
return *this;
}
bitset<_Nb>&
_Unchecked_set(size_t __pos, int __val) _GLIBCXX_NOEXCEPT
{
if (__val)
this->_M_getword(__pos) |= _Base::_S_maskbit(__pos);
else
this->_M_getword(__pos) &= ~_Base::_S_maskbit(__pos);
return *this;
}
bitset<_Nb>&
_Unchecked_reset(size_t __pos) _GLIBCXX_NOEXCEPT
{
this->_M_getword(__pos) &= ~_Base::_S_maskbit(__pos);
return *this;
}
bitset<_Nb>&
_Unchecked_flip(size_t __pos) _GLIBCXX_NOEXCEPT
{
this->_M_getword(__pos) ^= _Base::_S_maskbit(__pos);
return *this;
}
_GLIBCXX_CONSTEXPR bool
_Unchecked_test(size_t __pos) const _GLIBCXX_NOEXCEPT
{ return ((this->_M_getword(__pos) & _Base::_S_maskbit(__pos))
!= static_cast<_WordT>(0)); }
//@}
// Set, reset, and flip.
/**
* @brief Sets every bit to true.
*/
bitset<_Nb>&
set() _GLIBCXX_NOEXCEPT
{
this->_M_do_set();
this->_M_do_sanitize();
return *this;
}
/**
* @brief Sets a given bit to a particular value.
* @param __position The index of the bit.
* @param __val Either true or false, defaults to true.
* @throw std::out_of_range If @a pos is bigger the size of the %set.
*/
bitset<_Nb>&
set(size_t __position, bool __val = true)
{
this->_M_check(__position, __N("bitset::set"));
return _Unchecked_set(__position, __val);
}
/**
* @brief Sets every bit to false.
*/
bitset<_Nb>&
reset() _GLIBCXX_NOEXCEPT
{
this->_M_do_reset();
return *this;
}
/**
* @brief Sets a given bit to false.
* @param __position The index of the bit.
* @throw std::out_of_range If @a pos is bigger the size of the %set.
*
* Same as writing @c set(pos,false).
*/
bitset<_Nb>&
reset(size_t __position)
{
this->_M_check(__position, __N("bitset::reset"));
return _Unchecked_reset(__position);
}
/**
* @brief Toggles every bit to its opposite value.
*/
bitset<_Nb>&
flip() _GLIBCXX_NOEXCEPT
{
this->_M_do_flip();
this->_M_do_sanitize();
return *this;
}
/**
* @brief Toggles a given bit to its opposite value.
* @param __position The index of the bit.
* @throw std::out_of_range If @a pos is bigger the size of the %set.
*/
bitset<_Nb>&
flip(size_t __position)
{
this->_M_check(__position, __N("bitset::flip"));
return _Unchecked_flip(__position);
}
/// See the no-argument flip().
bitset<_Nb>
operator~() const _GLIBCXX_NOEXCEPT
{ return bitset<_Nb>(*this).flip(); }
//@{
/**
* @brief Array-indexing support.
* @param __position Index into the %bitset.
* @return A bool for a <em>const %bitset</em>. For non-const
* bitsets, an instance of the reference proxy class.
* @note These operators do no range checking and throw no exceptions,
* as required by DR 11 to the standard.
*
* _GLIBCXX_RESOLVE_LIB_DEFECTS Note that this implementation already
* resolves DR 11 (items 1 and 2), but does not do the range-checking
* required by that DR's resolution. -pme
* The DR has since been changed: range-checking is a precondition
* (users' responsibility), and these functions must not throw. -pme
*/
reference
operator[](size_t __position)
{ return reference(*this, __position); }
_GLIBCXX_CONSTEXPR bool
operator[](size_t __position) const
{ return _Unchecked_test(__position); }
//@}
/**
* @brief Returns a numerical interpretation of the %bitset.
* @return The integral equivalent of the bits.
* @throw std::overflow_error If there are too many bits to be
* represented in an @c unsigned @c long.
*/
unsigned long
to_ulong() const
{ return this->_M_do_to_ulong(); }
#if __cplusplus >= 201103L
unsigned long long
to_ullong() const
{ return this->_M_do_to_ullong(); }
#endif
/**
* @brief Returns a character interpretation of the %bitset.
* @return The string equivalent of the bits.
*
* Note the ordering of the bits: decreasing character positions
* correspond to increasing bit positions (see the main class notes for
* an example).
*/
template<class _CharT, class _Traits, class _Alloc>
std::basic_string<_CharT, _Traits, _Alloc>
to_string() const
{
std::basic_string<_CharT, _Traits, _Alloc> __result;
_M_copy_to_string(__result, _CharT('0'), _CharT('1'));
return __result;
}
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 396. what are characters zero and one.
template<class _CharT, class _Traits, class _Alloc>
std::basic_string<_CharT, _Traits, _Alloc>
to_string(_CharT __zero, _CharT __one = _CharT('1')) const
{
std::basic_string<_CharT, _Traits, _Alloc> __result;
_M_copy_to_string(__result, __zero, __one);
return __result;
}
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 434. bitset::to_string() hard to use.
template<class _CharT, class _Traits>
std::basic_string<_CharT, _Traits, std::allocator<_CharT> >
to_string() const
{ return to_string<_CharT, _Traits, std::allocator<_CharT> >(); }
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 853. to_string needs updating with zero and one.
template<class _CharT, class _Traits>
std::basic_string<_CharT, _Traits, std::allocator<_CharT> >
to_string(_CharT __zero, _CharT __one = _CharT('1')) const
{ return to_string<_CharT, _Traits,
std::allocator<_CharT> >(__zero, __one); }
template<class _CharT>
std::basic_string<_CharT, std::char_traits<_CharT>,
std::allocator<_CharT> >
to_string() const
{
return to_string<_CharT, std::char_traits<_CharT>,
std::allocator<_CharT> >();
}
template<class _CharT>
std::basic_string<_CharT, std::char_traits<_CharT>,
std::allocator<_CharT> >
to_string(_CharT __zero, _CharT __one = _CharT('1')) const
{
return to_string<_CharT, std::char_traits<_CharT>,
std::allocator<_CharT> >(__zero, __one);
}
std::basic_string<char, std::char_traits<char>, std::allocator<char> >
to_string() const
{
return to_string<char, std::char_traits<char>,
std::allocator<char> >();
}
std::basic_string<char, std::char_traits<char>, std::allocator<char> >
to_string(char __zero, char __one = '1') const
{
return to_string<char, std::char_traits<char>,
std::allocator<char> >(__zero, __one);
}
// Helper functions for string operations.
template<class _CharT, class _Traits>
void
_M_copy_from_ptr(const _CharT*, size_t, size_t, size_t,
_CharT, _CharT);
template<class _CharT, class _Traits, class _Alloc>
void
_M_copy_from_string(const std::basic_string<_CharT,
_Traits, _Alloc>& __s, size_t __pos, size_t __n,
_CharT __zero, _CharT __one)
{ _M_copy_from_ptr<_CharT, _Traits>(__s.data(), __s.size(), __pos, __n,
__zero, __one); }
template<class _CharT, class _Traits, class _Alloc>
void
_M_copy_to_string(std::basic_string<_CharT, _Traits, _Alloc>&,
_CharT, _CharT) const;
// NB: Backward compat.
template<class _CharT, class _Traits, class _Alloc>
void
_M_copy_from_string(const std::basic_string<_CharT,
_Traits, _Alloc>& __s, size_t __pos, size_t __n)
{ _M_copy_from_string(__s, __pos, __n, _CharT('0'), _CharT('1')); }
template<class _CharT, class _Traits, class _Alloc>
void
_M_copy_to_string(std::basic_string<_CharT, _Traits,_Alloc>& __s) const
{ _M_copy_to_string(__s, _CharT('0'), _CharT('1')); }
/// Returns the number of bits which are set.
size_t
count() const _GLIBCXX_NOEXCEPT
{ return this->_M_do_count(); }
/// Returns the total number of bits.
_GLIBCXX_CONSTEXPR size_t
size() const _GLIBCXX_NOEXCEPT
{ return _Nb; }
//@{
/// These comparisons for equality/inequality are, well, @e bitwise.
bool
operator==(const bitset<_Nb>& __rhs) const _GLIBCXX_NOEXCEPT
{ return this->_M_is_equal(__rhs); }
bool
operator!=(const bitset<_Nb>& __rhs) const _GLIBCXX_NOEXCEPT
{ return !this->_M_is_equal(__rhs); }
//@}
/**
* @brief Tests the value of a bit.
* @param __position The index of a bit.
* @return The value at @a pos.
* @throw std::out_of_range If @a pos is bigger the size of the %set.
*/
bool
test(size_t __position) const
{
this->_M_check(__position, __N("bitset::test"));
return _Unchecked_test(__position);
}
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// DR 693. std::bitset::all() missing.
/**
* @brief Tests whether all the bits are on.
* @return True if all the bits are set.
*/
bool
all() const _GLIBCXX_NOEXCEPT
{ return this->template _M_are_all<_Nb>(); }
/**
* @brief Tests whether any of the bits are on.
* @return True if at least one bit is set.
*/
bool
any() const _GLIBCXX_NOEXCEPT
{ return this->_M_is_any(); }
/**
* @brief Tests whether any of the bits are on.
* @return True if none of the bits are set.
*/
bool
none() const _GLIBCXX_NOEXCEPT
{ return !this->_M_is_any(); }
//@{
/// Self-explanatory.
bitset<_Nb>
operator<<(size_t __position) const _GLIBCXX_NOEXCEPT
{ return bitset<_Nb>(*this) <<= __position; }
bitset<_Nb>
operator>>(size_t __position) const _GLIBCXX_NOEXCEPT
{ return bitset<_Nb>(*this) >>= __position; }
//@}
/**
* @brief Finds the index of the first "on" bit.
* @return The index of the first bit set, or size() if not found.
* @ingroup SGIextensions
* @sa _Find_next
*/
size_t
_Find_first() const _GLIBCXX_NOEXCEPT
{ return this->_M_do_find_first(_Nb); }
/**
* @brief Finds the index of the next "on" bit after prev.
* @return The index of the next bit set, or size() if not found.
* @param __prev Where to start searching.
* @ingroup SGIextensions
* @sa _Find_first
*/
size_t
_Find_next(size_t __prev) const _GLIBCXX_NOEXCEPT
{ return this->_M_do_find_next(__prev, _Nb); }
};
// Definitions of non-inline member functions.
template<size_t _Nb>
template<class _CharT, class _Traits>
void
bitset<_Nb>::
_M_copy_from_ptr(const _CharT* __s, size_t __len,
size_t __pos, size_t __n, _CharT __zero, _CharT __one)
{
reset();
const size_t __nbits = std::min(_Nb, std::min(__n, size_t(__len - __pos)));
for (size_t __i = __nbits; __i > 0; --__i)
{
const _CharT __c = __s[__pos + __nbits - __i];
if (_Traits::eq(__c, __zero))
;
else if (_Traits::eq(__c, __one))
_Unchecked_set(__i - 1);
else
__throw_invalid_argument(__N("bitset::_M_copy_from_ptr"));
}
}
template<size_t _Nb>
template<class _CharT, class _Traits, class _Alloc>
void
bitset<_Nb>::
_M_copy_to_string(std::basic_string<_CharT, _Traits, _Alloc>& __s,
_CharT __zero, _CharT __one) const
{
__s.assign(_Nb, __zero);
for (size_t __i = _Nb; __i > 0; --__i)
if (_Unchecked_test(__i - 1))
_Traits::assign(__s[_Nb - __i], __one);
}
// 23.3.5.3 bitset operations:
//@{
/**
* @brief Global bitwise operations on bitsets.
* @param __x A bitset.
* @param __y A bitset of the same size as @a __x.
* @return A new bitset.
*
* These should be self-explanatory.
*/
template<size_t _Nb>
inline bitset<_Nb>
operator&(const bitset<_Nb>& __x, const bitset<_Nb>& __y) _GLIBCXX_NOEXCEPT
{
bitset<_Nb> __result(__x);
__result &= __y;
return __result;
}
template<size_t _Nb>
inline bitset<_Nb>
operator|(const bitset<_Nb>& __x, const bitset<_Nb>& __y) _GLIBCXX_NOEXCEPT
{
bitset<_Nb> __result(__x);
__result |= __y;
return __result;
}
template <size_t _Nb>
inline bitset<_Nb>
operator^(const bitset<_Nb>& __x, const bitset<_Nb>& __y) _GLIBCXX_NOEXCEPT
{
bitset<_Nb> __result(__x);
__result ^= __y;
return __result;
}
//@}
//@{
/**
* @brief Global I/O operators for bitsets.
*
* Direct I/O between streams and bitsets is supported. Output is
* straightforward. Input will skip whitespace, only accept @a 0 and @a 1
* characters, and will only extract as many digits as the %bitset will
* hold.
*/
template<class _CharT, class _Traits, size_t _Nb>
std::basic_istream<_CharT, _Traits>&
operator>>(std::basic_istream<_CharT, _Traits>& __is, bitset<_Nb>& __x)
{
typedef typename _Traits::char_type char_type;
typedef std::basic_istream<_CharT, _Traits> __istream_type;
typedef typename __istream_type::ios_base __ios_base;
std::basic_string<_CharT, _Traits> __tmp;
__tmp.reserve(_Nb);
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 303. Bitset input operator underspecified
const char_type __zero = __is.widen('0');
const char_type __one = __is.widen('1');
typename __ios_base::iostate __state = __ios_base::goodbit;
typename __istream_type::sentry __sentry(__is);
if (__sentry)
{
__try
{
for (size_t __i = _Nb; __i > 0; --__i)
{
static typename _Traits::int_type __eof = _Traits::eof();
typename _Traits::int_type __c1 = __is.rdbuf()->sbumpc();
if (_Traits::eq_int_type(__c1, __eof))
{
__state |= __ios_base::eofbit;
break;
}
else
{
const char_type __c2 = _Traits::to_char_type(__c1);
if (_Traits::eq(__c2, __zero))
__tmp.push_back(__zero);
else if (_Traits::eq(__c2, __one))
__tmp.push_back(__one);
else if (_Traits::
eq_int_type(__is.rdbuf()->sputbackc(__c2),
__eof))
{
__state |= __ios_base::failbit;
break;
}
}
}
}
__catch(__cxxabiv1::__forced_unwind&)
{
__is._M_setstate(__ios_base::badbit);
__throw_exception_again;
}
__catch(...)
{ __is._M_setstate(__ios_base::badbit); }
}
if (__tmp.empty() && _Nb)
__state |= __ios_base::failbit;
else
__x._M_copy_from_string(__tmp, static_cast<size_t>(0), _Nb,
__zero, __one);
if (__state)
__is.setstate(__state);
return __is;
}
template <class _CharT, class _Traits, size_t _Nb>
std::basic_ostream<_CharT, _Traits>&
operator<<(std::basic_ostream<_CharT, _Traits>& __os,
const bitset<_Nb>& __x)
{
std::basic_string<_CharT, _Traits> __tmp;
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 396. what are characters zero and one.
const ctype<_CharT>& __ct = use_facet<ctype<_CharT> >(__os.getloc());
__x._M_copy_to_string(__tmp, __ct.widen('0'), __ct.widen('1'));
return __os << __tmp;
}
//@}
_GLIBCXX_END_NAMESPACE_CONTAINER
} // namespace std
#undef _GLIBCXX_BITSET_WORDS
#undef _GLIBCXX_BITSET_BITS_PER_WORD
#undef _GLIBCXX_BITSET_BITS_PER_ULL
#if __cplusplus >= 201103L
#include <bits/functional_hash.h>
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
// DR 1182.
/// std::hash specialization for bitset.
template<size_t _Nb>
struct hash<_GLIBCXX_STD_C::bitset<_Nb>>
: public __hash_base<size_t, _GLIBCXX_STD_C::bitset<_Nb>>
{
size_t
operator()(const _GLIBCXX_STD_C::bitset<_Nb>& __b) const noexcept
{
const size_t __clength = (_Nb + __CHAR_BIT__ - 1) / __CHAR_BIT__;
return std::_Hash_impl::hash(__b._M_getdata(), __clength);
}
};
template<>
struct hash<_GLIBCXX_STD_C::bitset<0>>
: public __hash_base<size_t, _GLIBCXX_STD_C::bitset<0>>
{
size_t
operator()(const _GLIBCXX_STD_C::bitset<0>&) const noexcept
{ return 0; }
};
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
#endif // C++11
#ifdef _GLIBCXX_DEBUG
# include <debug/bitset>
#endif
#ifdef _GLIBCXX_PROFILE
# include <profile/bitset>
#endif
#endif /* _GLIBCXX_BITSET */
|