-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathuthash.h
1103 lines (1025 loc) · 69.6 KB
/
uthash.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 (c) 2003-2017, Troy D. Hanson http://troydhanson.github.com/uthash/
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
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 OWNER
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 UTHASH_H
#define UTHASH_H
#define UTHASH_VERSION 2.0.2
#include <string.h> /* memcmp, memset, strlen */
#include <stddef.h> /* ptrdiff_t */
#include <stdlib.h> /* exit */
/* These macros use decltype or the earlier __typeof GNU extension.
As decltype is only available in newer compilers (VS2010 or gcc 4.3+
when compiling c++ source) this code uses whatever method is needed
or, for VS2008 where neither is available, uses casting workarounds. */
#if !defined(DECLTYPE) && !defined(NO_DECLTYPE)
#if defined(_MSC_VER) /* MS compiler */
#if _MSC_VER >= 1600 && defined(__cplusplus) /* VS2010 or newer in C++ mode */
#define DECLTYPE(x) (decltype(x))
#else /* VS2008 or older (or VS2010 in C mode) */
#define NO_DECLTYPE
#endif
#elif defined(__BORLANDC__) || defined(__ICCARM__) || defined(__LCC__) || defined(__WATCOMC__)
#define NO_DECLTYPE
#else /* GNU, Sun and other compilers */
#define DECLTYPE(x) (__typeof(x))
#endif
#endif
#ifdef NO_DECLTYPE
#define DECLTYPE(x)
#define DECLTYPE_ASSIGN(dst,src) \
do { \
char **_da_dst = (char**)(&(dst)); \
*_da_dst = (char*)(src); \
} while (0)
#else
#define DECLTYPE_ASSIGN(dst,src) \
do { \
(dst) = DECLTYPE(dst)(src); \
} while (0)
#endif
/* a number of the hash function use uint32_t which isn't defined on Pre VS2010 */
#if defined(_WIN32)
#if defined(_MSC_VER) && _MSC_VER >= 1600
#include <stdint.h>
#elif defined(__WATCOMC__) || defined(__MINGW32__) || defined(__CYGWIN__)
#include <stdint.h>
#else
typedef unsigned int uint32_t;
typedef unsigned char uint8_t;
#endif
#elif defined(__GNUC__) && !defined(__VXWORKS__)
#include <stdint.h>
#else
typedef unsigned int uint32_t;
typedef unsigned char uint8_t;
#endif
#ifndef uthash_fatal
#define uthash_fatal(msg) exit(-1) /* fatal error (out of memory,etc) */
#endif
#ifndef uthash_malloc
#define uthash_malloc(sz) malloc(sz) /* malloc fcn */
#endif
#ifndef uthash_free
#define uthash_free(ptr,sz) free(ptr) /* free fcn */
#endif
#ifndef uthash_bzero
#define uthash_bzero(a,n) memset(a,'\0',n)
#endif
#ifndef uthash_memcmp
#define uthash_memcmp(a,b,n) memcmp(a,b,n)
#endif
#ifndef uthash_strlen
#define uthash_strlen(s) strlen(s)
#endif
#ifndef uthash_noexpand_fyi
#define uthash_noexpand_fyi(tbl) /* can be defined to log noexpand */
#endif
#ifndef uthash_expand_fyi
#define uthash_expand_fyi(tbl) /* can be defined to log expands */
#endif
/* initial number of buckets */
#define HASH_INITIAL_NUM_BUCKETS 32U /* initial number of buckets */
#define HASH_INITIAL_NUM_BUCKETS_LOG2 5U /* lg2 of initial number of buckets */
#define HASH_BKT_CAPACITY_THRESH 10U /* expand when bucket count reaches */
/* calculate the element whose hash handle address is hhp */
#define ELMT_FROM_HH(tbl,hhp) ((void*)(((char*)(hhp)) - ((tbl)->hho)))
/* calculate the hash handle from element address elp */
#define HH_FROM_ELMT(tbl,elp) ((UT_hash_handle *)(((char*)(elp)) + ((tbl)->hho)))
#define HASH_VALUE(keyptr,keylen,hashv) \
do { \
HASH_FCN(keyptr, keylen, hashv); \
} while (0)
#define HASH_FIND_BYHASHVALUE(hh,head,keyptr,keylen,hashval,out) \
do { \
(out) = NULL; \
if (head) { \
unsigned _hf_bkt; \
HASH_TO_BKT(hashval, (head)->hh.tbl->num_buckets, _hf_bkt); \
if (HASH_BLOOM_TEST((head)->hh.tbl, hashval) != 0) { \
HASH_FIND_IN_BKT((head)->hh.tbl, hh, (head)->hh.tbl->buckets[ _hf_bkt ], keyptr, keylen, hashval, out); \
} \
} \
} while (0)
#define HASH_FIND(hh,head,keyptr,keylen,out) \
do { \
unsigned _hf_hashv; \
HASH_VALUE(keyptr, keylen, _hf_hashv); \
HASH_FIND_BYHASHVALUE(hh, head, keyptr, keylen, _hf_hashv, out); \
} while (0)
#ifdef HASH_BLOOM
#define HASH_BLOOM_BITLEN (1UL << HASH_BLOOM)
#define HASH_BLOOM_BYTELEN (HASH_BLOOM_BITLEN/8UL) + (((HASH_BLOOM_BITLEN%8UL)!=0UL) ? 1UL : 0UL)
#define HASH_BLOOM_MAKE(tbl) \
do { \
(tbl)->bloom_nbits = HASH_BLOOM; \
(tbl)->bloom_bv = (uint8_t*)uthash_malloc(HASH_BLOOM_BYTELEN); \
if (!(tbl)->bloom_bv) { \
uthash_fatal("out of memory"); \
} \
uthash_bzero((tbl)->bloom_bv, HASH_BLOOM_BYTELEN); \
(tbl)->bloom_sig = HASH_BLOOM_SIGNATURE; \
} while (0)
#define HASH_BLOOM_FREE(tbl) \
do { \
uthash_free((tbl)->bloom_bv, HASH_BLOOM_BYTELEN); \
} while (0)
#define HASH_BLOOM_BITSET(bv,idx) (bv[(idx)/8U] |= (1U << ((idx)%8U)))
#define HASH_BLOOM_BITTEST(bv,idx) (bv[(idx)/8U] & (1U << ((idx)%8U)))
#define HASH_BLOOM_ADD(tbl,hashv) \
HASH_BLOOM_BITSET((tbl)->bloom_bv, (hashv & (uint32_t)((1UL << (tbl)->bloom_nbits) - 1U)))
#define HASH_BLOOM_TEST(tbl,hashv) \
HASH_BLOOM_BITTEST((tbl)->bloom_bv, (hashv & (uint32_t)((1UL << (tbl)->bloom_nbits) - 1U)))
#else
#define HASH_BLOOM_MAKE(tbl)
#define HASH_BLOOM_FREE(tbl)
#define HASH_BLOOM_ADD(tbl,hashv)
#define HASH_BLOOM_TEST(tbl,hashv) (1)
#define HASH_BLOOM_BYTELEN 0U
#endif
#define HASH_MAKE_TABLE(hh,head) \
do { \
(head)->hh.tbl = (UT_hash_table*)uthash_malloc(sizeof(UT_hash_table)); \
if (!(head)->hh.tbl) { \
uthash_fatal("out of memory"); \
} \
uthash_bzero((head)->hh.tbl, sizeof(UT_hash_table)); \
(head)->hh.tbl->tail = &((head)->hh); \
(head)->hh.tbl->num_buckets = HASH_INITIAL_NUM_BUCKETS; \
(head)->hh.tbl->log2_num_buckets = HASH_INITIAL_NUM_BUCKETS_LOG2; \
(head)->hh.tbl->hho = (char*)(&(head)->hh) - (char*)(head); \
(head)->hh.tbl->buckets = (UT_hash_bucket*)uthash_malloc( \
HASH_INITIAL_NUM_BUCKETS * sizeof(struct UT_hash_bucket)); \
if (!(head)->hh.tbl->buckets) { \
uthash_fatal("out of memory"); \
} \
uthash_bzero((head)->hh.tbl->buckets, \
HASH_INITIAL_NUM_BUCKETS * sizeof(struct UT_hash_bucket)); \
HASH_BLOOM_MAKE((head)->hh.tbl); \
(head)->hh.tbl->signature = HASH_SIGNATURE; \
} while (0)
#define HASH_REPLACE_BYHASHVALUE_INORDER(hh,head,fieldname,keylen_in,hashval,add,replaced,cmpfcn) \
do { \
(replaced) = NULL; \
HASH_FIND_BYHASHVALUE(hh, head, &((add)->fieldname), keylen_in, hashval, replaced); \
if (replaced) { \
HASH_DELETE(hh, head, replaced); \
} \
HASH_ADD_KEYPTR_BYHASHVALUE_INORDER(hh, head, &((add)->fieldname), keylen_in, hashval, add, cmpfcn); \
} while (0)
#define HASH_REPLACE_BYHASHVALUE(hh,head,fieldname,keylen_in,hashval,add,replaced) \
do { \
(replaced) = NULL; \
HASH_FIND_BYHASHVALUE(hh, head, &((add)->fieldname), keylen_in, hashval, replaced); \
if (replaced) { \
HASH_DELETE(hh, head, replaced); \
} \
HASH_ADD_KEYPTR_BYHASHVALUE(hh, head, &((add)->fieldname), keylen_in, hashval, add); \
} while (0)
#define HASH_REPLACE(hh,head,fieldname,keylen_in,add,replaced) \
do { \
unsigned _hr_hashv; \
HASH_VALUE(&((add)->fieldname), keylen_in, _hr_hashv); \
HASH_REPLACE_BYHASHVALUE(hh, head, fieldname, keylen_in, _hr_hashv, add, replaced); \
} while (0)
#define HASH_REPLACE_INORDER(hh,head,fieldname,keylen_in,add,replaced,cmpfcn) \
do { \
unsigned _hr_hashv; \
HASH_VALUE(&((add)->fieldname), keylen_in, _hr_hashv); \
HASH_REPLACE_BYHASHVALUE_INORDER(hh, head, fieldname, keylen_in, _hr_hashv, add, replaced, cmpfcn); \
} while (0)
#define HASH_APPEND_LIST(hh, head, add) \
do { \
(add)->hh.next = NULL; \
(add)->hh.prev = ELMT_FROM_HH((head)->hh.tbl, (head)->hh.tbl->tail); \
(head)->hh.tbl->tail->next = (add); \
(head)->hh.tbl->tail = &((add)->hh); \
} while (0)
#define HASH_AKBI_INNER_LOOP(hh,head,add,cmpfcn) \
do { \
do { \
if (cmpfcn(DECLTYPE(head)(_hs_iter), add) > 0) { \
break; \
} \
} while ((_hs_iter = HH_FROM_ELMT((head)->hh.tbl, _hs_iter)->next)); \
} while (0)
#ifdef NO_DECLTYPE
#undef HASH_AKBI_INNER_LOOP
#define HASH_AKBI_INNER_LOOP(hh,head,add,cmpfcn) \
do { \
char *_hs_saved_head = (char*)(head); \
do { \
DECLTYPE_ASSIGN(head, _hs_iter); \
if (cmpfcn(head, add) > 0) { \
DECLTYPE_ASSIGN(head, _hs_saved_head); \
break; \
} \
DECLTYPE_ASSIGN(head, _hs_saved_head); \
} while ((_hs_iter = HH_FROM_ELMT((head)->hh.tbl, _hs_iter)->next)); \
} while (0)
#endif
#define HASH_ADD_KEYPTR_BYHASHVALUE_INORDER(hh,head,keyptr,keylen_in,hashval,add,cmpfcn) \
do { \
unsigned _ha_bkt; \
(add)->hh.hashv = (hashval); \
(add)->hh.key = (char*) (keyptr); \
(add)->hh.keylen = (unsigned) (keylen_in); \
if (!(head)) { \
(add)->hh.next = NULL; \
(add)->hh.prev = NULL; \
(head) = (add); \
HASH_MAKE_TABLE(hh, head); \
} else { \
void *_hs_iter = (head); \
(add)->hh.tbl = (head)->hh.tbl; \
HASH_AKBI_INNER_LOOP(hh, head, add, cmpfcn); \
if (_hs_iter) { \
(add)->hh.next = _hs_iter; \
if (((add)->hh.prev = HH_FROM_ELMT((head)->hh.tbl, _hs_iter)->prev)) { \
HH_FROM_ELMT((head)->hh.tbl, (add)->hh.prev)->next = (add); \
} else { \
(head) = (add); \
} \
HH_FROM_ELMT((head)->hh.tbl, _hs_iter)->prev = (add); \
} else { \
HASH_APPEND_LIST(hh, head, add); \
} \
} \
(head)->hh.tbl->num_items++; \
HASH_TO_BKT(hashval, (head)->hh.tbl->num_buckets, _ha_bkt); \
HASH_ADD_TO_BKT((head)->hh.tbl->buckets[_ha_bkt], &(add)->hh); \
HASH_BLOOM_ADD((head)->hh.tbl, hashval); \
HASH_EMIT_KEY(hh, head, keyptr, keylen_in); \
HASH_FSCK(hh, head, "HASH_ADD_KEYPTR_BYHASHVALUE_INORDER"); \
} while (0)
#define HASH_ADD_KEYPTR_INORDER(hh,head,keyptr,keylen_in,add,cmpfcn) \
do { \
unsigned _hs_hashv; \
HASH_VALUE(keyptr, keylen_in, _hs_hashv); \
HASH_ADD_KEYPTR_BYHASHVALUE_INORDER(hh, head, keyptr, keylen_in, _hs_hashv, add, cmpfcn); \
} while (0)
#define HASH_ADD_BYHASHVALUE_INORDER(hh,head,fieldname,keylen_in,hashval,add,cmpfcn) \
HASH_ADD_KEYPTR_BYHASHVALUE_INORDER(hh, head, &((add)->fieldname), keylen_in, hashval, add, cmpfcn)
#define HASH_ADD_INORDER(hh,head,fieldname,keylen_in,add,cmpfcn) \
HASH_ADD_KEYPTR_INORDER(hh, head, &((add)->fieldname), keylen_in, add, cmpfcn)
#define HASH_ADD_KEYPTR_BYHASHVALUE(hh,head,keyptr,keylen_in,hashval,add) \
do { \
unsigned _ha_bkt; \
(add)->hh.hashv = (hashval); \
(add)->hh.key = (char*) (keyptr); \
(add)->hh.keylen = (unsigned) (keylen_in); \
if (!(head)) { \
(add)->hh.next = NULL; \
(add)->hh.prev = NULL; \
(head) = (add); \
HASH_MAKE_TABLE(hh, head); \
} else { \
(add)->hh.tbl = (head)->hh.tbl; \
HASH_APPEND_LIST(hh, head, add); \
} \
(head)->hh.tbl->num_items++; \
HASH_TO_BKT(hashval, (head)->hh.tbl->num_buckets, _ha_bkt); \
HASH_ADD_TO_BKT((head)->hh.tbl->buckets[_ha_bkt], &(add)->hh); \
HASH_BLOOM_ADD((head)->hh.tbl, hashval); \
HASH_EMIT_KEY(hh, head, keyptr, keylen_in); \
HASH_FSCK(hh, head, "HASH_ADD_KEYPTR_BYHASHVALUE"); \
} while (0)
#define HASH_ADD_KEYPTR(hh,head,keyptr,keylen_in,add) \
do { \
unsigned _ha_hashv; \
HASH_VALUE(keyptr, keylen_in, _ha_hashv); \
HASH_ADD_KEYPTR_BYHASHVALUE(hh, head, keyptr, keylen_in, _ha_hashv, add); \
} while (0)
#define HASH_ADD_BYHASHVALUE(hh,head,fieldname,keylen_in,hashval,add) \
HASH_ADD_KEYPTR_BYHASHVALUE(hh, head, &((add)->fieldname), keylen_in, hashval, add)
#define HASH_ADD(hh,head,fieldname,keylen_in,add) \
HASH_ADD_KEYPTR(hh, head, &((add)->fieldname), keylen_in, add)
#define HASH_TO_BKT(hashv,num_bkts,bkt) \
do { \
bkt = ((hashv) & ((num_bkts) - 1U)); \
} while (0)
/* delete "delptr" from the hash table.
* "the usual" patch-up process for the app-order doubly-linked-list.
* The use of _hd_hh_del below deserves special explanation.
* These used to be expressed using (delptr) but that led to a bug
* if someone used the same symbol for the head and deletee, like
* HASH_DELETE(hh,users,users);
* We want that to work, but by changing the head (users) below
* we were forfeiting our ability to further refer to the deletee (users)
* in the patch-up process. Solution: use scratch space to
* copy the deletee pointer, then the latter references are via that
* scratch pointer rather than through the repointed (users) symbol.
*/
#define HASH_DELETE(hh,head,delptr) \
do { \
struct UT_hash_handle *_hd_hh_del; \
if (((delptr)->hh.prev == NULL) && ((delptr)->hh.next == NULL)) { \
HASH_BLOOM_FREE((head)->hh.tbl); \
uthash_free((head)->hh.tbl->buckets, \
(head)->hh.tbl->num_buckets * sizeof(struct UT_hash_bucket)); \
uthash_free((head)->hh.tbl, sizeof(UT_hash_table)); \
(head) = NULL; \
} else { \
unsigned _hd_bkt; \
_hd_hh_del = &((delptr)->hh); \
if ((delptr) == ELMT_FROM_HH((head)->hh.tbl, (head)->hh.tbl->tail)) { \
(head)->hh.tbl->tail = HH_FROM_ELMT((head)->hh.tbl, (delptr)->hh.prev); \
} \
if ((delptr)->hh.prev != NULL) { \
HH_FROM_ELMT((head)->hh.tbl, (delptr)->hh.prev)->next = (delptr)->hh.next; \
} else { \
DECLTYPE_ASSIGN(head, (delptr)->hh.next); \
} \
if (_hd_hh_del->next != NULL) { \
HH_FROM_ELMT((head)->hh.tbl, _hd_hh_del->next)->prev = _hd_hh_del->prev; \
} \
HASH_TO_BKT(_hd_hh_del->hashv, (head)->hh.tbl->num_buckets, _hd_bkt); \
HASH_DEL_IN_BKT(hh, (head)->hh.tbl->buckets[_hd_bkt], _hd_hh_del); \
(head)->hh.tbl->num_items--; \
} \
HASH_FSCK(hh, head, "HASH_DELETE"); \
} while (0)
/* convenience forms of HASH_FIND/HASH_ADD/HASH_DEL */
#define HASH_FIND_STR(head,findstr,out) \
HASH_FIND(hh,head,findstr,(unsigned)uthash_strlen(findstr),out)
#define HASH_ADD_STR(head,strfield,add) \
HASH_ADD(hh,head,strfield[0],(unsigned)uthash_strlen(add->strfield),add)
#define HASH_REPLACE_STR(head,strfield,add,replaced) \
HASH_REPLACE(hh,head,strfield[0],(unsigned)uthash_strlen(add->strfield),add,replaced)
#define HASH_FIND_INT(head,findint,out) \
HASH_FIND(hh,head,findint,sizeof(int),out)
#define HASH_ADD_INT(head,intfield,add) \
HASH_ADD(hh,head,intfield,sizeof(int),add)
#define HASH_REPLACE_INT(head,intfield,add,replaced) \
HASH_REPLACE(hh,head,intfield,sizeof(int),add,replaced)
#define HASH_FIND_PTR(head,findptr,out) \
HASH_FIND(hh,head,findptr,sizeof(void *),out)
#define HASH_ADD_PTR(head,ptrfield,add) \
HASH_ADD(hh,head,ptrfield,sizeof(void *),add)
#define HASH_REPLACE_PTR(head,ptrfield,add,replaced) \
HASH_REPLACE(hh,head,ptrfield,sizeof(void *),add,replaced)
#define HASH_DEL(head,delptr) \
HASH_DELETE(hh,head,delptr)
/* HASH_FSCK checks hash integrity on every add/delete when HASH_DEBUG is defined.
* This is for uthash developer only; it compiles away if HASH_DEBUG isn't defined.
*/
#ifdef HASH_DEBUG
#define HASH_OOPS(...) do { fprintf(stderr,__VA_ARGS__); exit(-1); } while (0)
#define HASH_FSCK(hh,head,where) \
do { \
struct UT_hash_handle *_thh; \
if (head) { \
unsigned _bkt_i; \
unsigned _count = 0; \
char *_prev; \
for (_bkt_i = 0; _bkt_i < (head)->hh.tbl->num_buckets; ++_bkt_i) { \
unsigned _bkt_count = 0; \
_thh = (head)->hh.tbl->buckets[_bkt_i].hh_head; \
_prev = NULL; \
while (_thh) { \
if (_prev != (char*)(_thh->hh_prev)) { \
HASH_OOPS("%s: invalid hh_prev %p, actual %p\n", \
(where), (void*)_thh->hh_prev, (void*)_prev); \
} \
_bkt_count++; \
_prev = (char*)(_thh); \
_thh = _thh->hh_next; \
} \
_count += _bkt_count; \
if ((head)->hh.tbl->buckets[_bkt_i].count != _bkt_count) { \
HASH_OOPS("%s: invalid bucket count %u, actual %u\n", \
(where), (head)->hh.tbl->buckets[_bkt_i].count, _bkt_count); \
} \
} \
if (_count != (head)->hh.tbl->num_items) { \
HASH_OOPS("%s: invalid hh item count %u, actual %u\n", \
(where), (head)->hh.tbl->num_items, _count); \
} \
_count = 0; \
_prev = NULL; \
_thh = &(head)->hh; \
while (_thh) { \
_count++; \
if (_prev != (char*)_thh->prev) { \
HASH_OOPS("%s: invalid prev %p, actual %p\n", \
(where), (void*)_thh->prev, (void*)_prev); \
} \
_prev = (char*)ELMT_FROM_HH((head)->hh.tbl, _thh); \
_thh = (_thh->next ? HH_FROM_ELMT((head)->hh.tbl, _thh->next) : NULL); \
} \
if (_count != (head)->hh.tbl->num_items) { \
HASH_OOPS("%s: invalid app item count %u, actual %u\n", \
(where), (head)->hh.tbl->num_items, _count); \
} \
} \
} while (0)
#else
#define HASH_FSCK(hh,head,where)
#endif
/* When compiled with -DHASH_EMIT_KEYS, length-prefixed keys are emitted to
* the descriptor to which this macro is defined for tuning the hash function.
* The app can #include <unistd.h> to get the prototype for write(2). */
#ifdef HASH_EMIT_KEYS
#define HASH_EMIT_KEY(hh,head,keyptr,fieldlen) \
do { \
unsigned _klen = fieldlen; \
write(HASH_EMIT_KEYS, &_klen, sizeof(_klen)); \
write(HASH_EMIT_KEYS, keyptr, (unsigned long)fieldlen); \
} while (0)
#else
#define HASH_EMIT_KEY(hh,head,keyptr,fieldlen)
#endif
/* default to Jenkin's hash unless overridden e.g. DHASH_FUNCTION=HASH_SAX */
#ifdef HASH_FUNCTION
#define HASH_FCN HASH_FUNCTION
#else
#define HASH_FCN HASH_JEN
#endif
/* The Bernstein hash function, used in Perl prior to v5.6. Note (x<<5+x)=x*33. */
#define HASH_BER(key,keylen,hashv) \
do { \
unsigned _hb_keylen = (unsigned)keylen; \
const unsigned char *_hb_key = (const unsigned char*)(key); \
(hashv) = 0; \
while (_hb_keylen-- != 0U) { \
(hashv) = (((hashv) << 5) + (hashv)) + *_hb_key++; \
} \
} while (0)
/* SAX/FNV/OAT/JEN hash functions are macro variants of those listed at
* http://eternallyconfuzzled.com/tuts/algorithms/jsw_tut_hashing.aspx */
#define HASH_SAX(key,keylen,hashv) \
do { \
unsigned _sx_i; \
const unsigned char *_hs_key = (const unsigned char*)(key); \
hashv = 0; \
for (_sx_i=0; _sx_i < keylen; _sx_i++) { \
hashv ^= (hashv << 5) + (hashv >> 2) + _hs_key[_sx_i]; \
} \
} while (0)
/* FNV-1a variation */
#define HASH_FNV(key,keylen,hashv) \
do { \
unsigned _fn_i; \
const unsigned char *_hf_key = (const unsigned char*)(key); \
(hashv) = 2166136261U; \
for (_fn_i=0; _fn_i < keylen; _fn_i++) { \
hashv = hashv ^ _hf_key[_fn_i]; \
hashv = hashv * 16777619U; \
} \
} while (0)
#define HASH_OAT(key,keylen,hashv) \
do { \
unsigned _ho_i; \
const unsigned char *_ho_key=(const unsigned char*)(key); \
hashv = 0; \
for(_ho_i=0; _ho_i < keylen; _ho_i++) { \
hashv += _ho_key[_ho_i]; \
hashv += (hashv << 10); \
hashv ^= (hashv >> 6); \
} \
hashv += (hashv << 3); \
hashv ^= (hashv >> 11); \
hashv += (hashv << 15); \
} while (0)
#define HASH_JEN_MIX(a,b,c) \
do { \
a -= b; a -= c; a ^= ( c >> 13 ); \
b -= c; b -= a; b ^= ( a << 8 ); \
c -= a; c -= b; c ^= ( b >> 13 ); \
a -= b; a -= c; a ^= ( c >> 12 ); \
b -= c; b -= a; b ^= ( a << 16 ); \
c -= a; c -= b; c ^= ( b >> 5 ); \
a -= b; a -= c; a ^= ( c >> 3 ); \
b -= c; b -= a; b ^= ( a << 10 ); \
c -= a; c -= b; c ^= ( b >> 15 ); \
} while (0)
#define HASH_JEN(key,keylen,hashv) \
do { \
unsigned _hj_i,_hj_j,_hj_k; \
unsigned const char *_hj_key=(unsigned const char*)(key); \
hashv = 0xfeedbeefu; \
_hj_i = _hj_j = 0x9e3779b9u; \
_hj_k = (unsigned)(keylen); \
while (_hj_k >= 12U) { \
_hj_i += (_hj_key[0] + ( (unsigned)_hj_key[1] << 8 ) \
+ ( (unsigned)_hj_key[2] << 16 ) \
+ ( (unsigned)_hj_key[3] << 24 ) ); \
_hj_j += (_hj_key[4] + ( (unsigned)_hj_key[5] << 8 ) \
+ ( (unsigned)_hj_key[6] << 16 ) \
+ ( (unsigned)_hj_key[7] << 24 ) ); \
hashv += (_hj_key[8] + ( (unsigned)_hj_key[9] << 8 ) \
+ ( (unsigned)_hj_key[10] << 16 ) \
+ ( (unsigned)_hj_key[11] << 24 ) ); \
\
HASH_JEN_MIX(_hj_i, _hj_j, hashv); \
\
_hj_key += 12; \
_hj_k -= 12U; \
} \
hashv += (unsigned)(keylen); \
switch ( _hj_k ) { \
case 11: hashv += ( (unsigned)_hj_key[10] << 24 ); /* FALLTHROUGH */ \
case 10: hashv += ( (unsigned)_hj_key[9] << 16 ); /* FALLTHROUGH */ \
case 9: hashv += ( (unsigned)_hj_key[8] << 8 ); /* FALLTHROUGH */ \
case 8: _hj_j += ( (unsigned)_hj_key[7] << 24 ); /* FALLTHROUGH */ \
case 7: _hj_j += ( (unsigned)_hj_key[6] << 16 ); /* FALLTHROUGH */ \
case 6: _hj_j += ( (unsigned)_hj_key[5] << 8 ); /* FALLTHROUGH */ \
case 5: _hj_j += _hj_key[4]; /* FALLTHROUGH */ \
case 4: _hj_i += ( (unsigned)_hj_key[3] << 24 ); /* FALLTHROUGH */ \
case 3: _hj_i += ( (unsigned)_hj_key[2] << 16 ); /* FALLTHROUGH */ \
case 2: _hj_i += ( (unsigned)_hj_key[1] << 8 ); /* FALLTHROUGH */ \
case 1: _hj_i += _hj_key[0]; \
} \
HASH_JEN_MIX(_hj_i, _hj_j, hashv); \
} while (0)
/* The Paul Hsieh hash function */
#undef get16bits
#if (defined(__GNUC__) && defined(__i386__)) || defined(__WATCOMC__) \
|| defined(_MSC_VER) || defined (__BORLANDC__) || defined (__TURBOC__)
#define get16bits(d) (*((const uint16_t *) (d)))
#endif
#if !defined (get16bits)
#define get16bits(d) ((((uint32_t)(((const uint8_t *)(d))[1])) << 8) \
+(uint32_t)(((const uint8_t *)(d))[0]) )
#endif
#define HASH_SFH(key,keylen,hashv) \
do { \
unsigned const char *_sfh_key=(unsigned const char*)(key); \
uint32_t _sfh_tmp, _sfh_len = (uint32_t)keylen; \
\
unsigned _sfh_rem = _sfh_len & 3U; \
_sfh_len >>= 2; \
hashv = 0xcafebabeu; \
\
/* Main loop */ \
for (;_sfh_len > 0U; _sfh_len--) { \
hashv += get16bits (_sfh_key); \
_sfh_tmp = ((uint32_t)(get16bits (_sfh_key+2)) << 11) ^ hashv; \
hashv = (hashv << 16) ^ _sfh_tmp; \
_sfh_key += 2U*sizeof (uint16_t); \
hashv += hashv >> 11; \
} \
\
/* Handle end cases */ \
switch (_sfh_rem) { \
case 3: hashv += get16bits (_sfh_key); \
hashv ^= hashv << 16; \
hashv ^= (uint32_t)(_sfh_key[sizeof (uint16_t)]) << 18; \
hashv += hashv >> 11; \
break; \
case 2: hashv += get16bits (_sfh_key); \
hashv ^= hashv << 11; \
hashv += hashv >> 17; \
break; \
case 1: hashv += *_sfh_key; \
hashv ^= hashv << 10; \
hashv += hashv >> 1; \
} \
\
/* Force "avalanching" of final 127 bits */ \
hashv ^= hashv << 3; \
hashv += hashv >> 5; \
hashv ^= hashv << 4; \
hashv += hashv >> 17; \
hashv ^= hashv << 25; \
hashv += hashv >> 6; \
} while (0)
#ifdef HASH_USING_NO_STRICT_ALIASING
/* The MurmurHash exploits some CPU's (x86,x86_64) tolerance for unaligned reads.
* For other types of CPU's (e.g. Sparc) an unaligned read causes a bus error.
* MurmurHash uses the faster approach only on CPU's where we know it's safe.
*
* Note the preprocessor built-in defines can be emitted using:
*
* gcc -m64 -dM -E - < /dev/null (on gcc)
* cc -## a.c (where a.c is a simple test file) (Sun Studio)
*/
#if (defined(__i386__) || defined(__x86_64__) || defined(_M_IX86))
#define MUR_GETBLOCK(p,i) p[i]
#else /* non intel */
#define MUR_PLUS0_ALIGNED(p) (((unsigned long)p & 3UL) == 0UL)
#define MUR_PLUS1_ALIGNED(p) (((unsigned long)p & 3UL) == 1UL)
#define MUR_PLUS2_ALIGNED(p) (((unsigned long)p & 3UL) == 2UL)
#define MUR_PLUS3_ALIGNED(p) (((unsigned long)p & 3UL) == 3UL)
#define WP(p) ((uint32_t*)((unsigned long)(p) & ~3UL))
#if (defined(__BIG_ENDIAN__) || defined(SPARC) || defined(__ppc__) || defined(__ppc64__))
#define MUR_THREE_ONE(p) ((((*WP(p))&0x00ffffff) << 8) | (((*(WP(p)+1))&0xff000000) >> 24))
#define MUR_TWO_TWO(p) ((((*WP(p))&0x0000ffff) <<16) | (((*(WP(p)+1))&0xffff0000) >> 16))
#define MUR_ONE_THREE(p) ((((*WP(p))&0x000000ff) <<24) | (((*(WP(p)+1))&0xffffff00) >> 8))
#else /* assume little endian non-intel */
#define MUR_THREE_ONE(p) ((((*WP(p))&0xffffff00) >> 8) | (((*(WP(p)+1))&0x000000ff) << 24))
#define MUR_TWO_TWO(p) ((((*WP(p))&0xffff0000) >>16) | (((*(WP(p)+1))&0x0000ffff) << 16))
#define MUR_ONE_THREE(p) ((((*WP(p))&0xff000000) >>24) | (((*(WP(p)+1))&0x00ffffff) << 8))
#endif
#define MUR_GETBLOCK(p,i) (MUR_PLUS0_ALIGNED(p) ? ((p)[i]) : \
(MUR_PLUS1_ALIGNED(p) ? MUR_THREE_ONE(p) : \
(MUR_PLUS2_ALIGNED(p) ? MUR_TWO_TWO(p) : \
MUR_ONE_THREE(p))))
#endif
#define MUR_ROTL32(x,r) (((x) << (r)) | ((x) >> (32 - (r))))
#define MUR_FMIX(_h) \
do { \
_h ^= _h >> 16; \
_h *= 0x85ebca6bu; \
_h ^= _h >> 13; \
_h *= 0xc2b2ae35u; \
_h ^= _h >> 16; \
} while (0)
#define HASH_MUR(key,keylen,hashv) \
do { \
const uint8_t *_mur_data = (const uint8_t*)(key); \
const int _mur_nblocks = (int)(keylen) / 4; \
uint32_t _mur_h1 = 0xf88D5353u; \
uint32_t _mur_c1 = 0xcc9e2d51u; \
uint32_t _mur_c2 = 0x1b873593u; \
uint32_t _mur_k1 = 0; \
const uint8_t *_mur_tail; \
const uint32_t *_mur_blocks = (const uint32_t*)(_mur_data+(_mur_nblocks*4)); \
int _mur_i; \
for (_mur_i = -_mur_nblocks; _mur_i != 0; _mur_i++) { \
_mur_k1 = MUR_GETBLOCK(_mur_blocks,_mur_i); \
_mur_k1 *= _mur_c1; \
_mur_k1 = MUR_ROTL32(_mur_k1,15); \
_mur_k1 *= _mur_c2; \
\
_mur_h1 ^= _mur_k1; \
_mur_h1 = MUR_ROTL32(_mur_h1,13); \
_mur_h1 = (_mur_h1*5U) + 0xe6546b64u; \
} \
_mur_tail = (const uint8_t*)(_mur_data + (_mur_nblocks*4)); \
_mur_k1=0; \
switch ((keylen) & 3U) { \
case 0: break; \
case 3: _mur_k1 ^= (uint32_t)_mur_tail[2] << 16; /* FALLTHROUGH */ \
case 2: _mur_k1 ^= (uint32_t)_mur_tail[1] << 8; /* FALLTHROUGH */ \
case 1: _mur_k1 ^= (uint32_t)_mur_tail[0]; \
_mur_k1 *= _mur_c1; \
_mur_k1 = MUR_ROTL32(_mur_k1,15); \
_mur_k1 *= _mur_c2; \
_mur_h1 ^= _mur_k1; \
} \
_mur_h1 ^= (uint32_t)(keylen); \
MUR_FMIX(_mur_h1); \
hashv = _mur_h1; \
} while (0)
#endif /* HASH_USING_NO_STRICT_ALIASING */
/* iterate over items in a known bucket to find desired item */
#define HASH_FIND_IN_BKT(tbl,hh,head,keyptr,keylen_in,hashval,out) \
do { \
if ((head).hh_head != NULL) { \
DECLTYPE_ASSIGN(out, ELMT_FROM_HH(tbl, (head).hh_head)); \
} else { \
(out) = NULL; \
} \
while ((out) != NULL) { \
if ((out)->hh.hashv == (hashval) && (out)->hh.keylen == (keylen_in)) { \
if (uthash_memcmp((out)->hh.key, keyptr, keylen_in) == 0) { \
break; \
} \
} \
if ((out)->hh.hh_next != NULL) { \
DECLTYPE_ASSIGN(out, ELMT_FROM_HH(tbl, (out)->hh.hh_next)); \
} else { \
(out) = NULL; \
} \
} \
} while (0)
/* add an item to a bucket */
#define HASH_ADD_TO_BKT(head,addhh) \
do { \
head.count++; \
(addhh)->hh_next = head.hh_head; \
(addhh)->hh_prev = NULL; \
if ((head).hh_head != NULL) { \
(head).hh_head->hh_prev = (addhh); \
} \
(head).hh_head=addhh; \
if ((head.count >= ((head.expand_mult+1U) * HASH_BKT_CAPACITY_THRESH)) \
&& ((addhh)->tbl->noexpand != 1U)) { \
HASH_EXPAND_BUCKETS((addhh)->tbl); \
} \
} while (0)
/* remove an item from a given bucket */
#define HASH_DEL_IN_BKT(hh,head,hh_del) \
do { \
(head).count--; \
if ((head).hh_head == (hh_del)) { \
(head).hh_head = (hh_del)->hh_next; \
} \
if ((hh_del)->hh_prev) { \
(hh_del)->hh_prev->hh_next = (hh_del)->hh_next; \
} \
if ((hh_del)->hh_next) { \
(hh_del)->hh_next->hh_prev = (hh_del)->hh_prev; \
} \
} while (0)
/* Bucket expansion has the effect of doubling the number of buckets
* and redistributing the items into the new buckets. Ideally the
* items will distribute more or less evenly into the new buckets
* (the extent to which this is true is a measure of the quality of
* the hash function as it applies to the key domain).
*
* With the items distributed into more buckets, the chain length
* (item count) in each bucket is reduced. Thus by expanding buckets
* the hash keeps a bound on the chain length. This bounded chain
* length is the essence of how a hash provides constant time lookup.
*
* The calculation of tbl->ideal_chain_maxlen below deserves some
* explanation. First, keep in mind that we're calculating the ideal
* maximum chain length based on the *new* (doubled) bucket count.
* In fractions this is just n/b (n=number of items,b=new num buckets).
* Since the ideal chain length is an integer, we want to calculate
* ceil(n/b). We don't depend on floating point arithmetic in this
* hash, so to calculate ceil(n/b) with integers we could write
*
* ceil(n/b) = (n/b) + ((n%b)?1:0)
*
* and in fact a previous version of this hash did just that.
* But now we have improved things a bit by recognizing that b is
* always a power of two. We keep its base 2 log handy (call it lb),
* so now we can write this with a bit shift and logical AND:
*
* ceil(n/b) = (n>>lb) + ( (n & (b-1)) ? 1:0)
*
*/
#define HASH_EXPAND_BUCKETS(tbl) \
do { \
unsigned _he_bkt; \
unsigned _he_bkt_i; \
struct UT_hash_handle *_he_thh, *_he_hh_nxt; \
UT_hash_bucket *_he_new_buckets, *_he_newbkt; \
_he_new_buckets = (UT_hash_bucket*)uthash_malloc( \
2UL * tbl->num_buckets * sizeof(struct UT_hash_bucket)); \
if (!_he_new_buckets) { \
uthash_fatal("out of memory"); \
} \
uthash_bzero(_he_new_buckets, \
2UL * tbl->num_buckets * sizeof(struct UT_hash_bucket)); \
tbl->ideal_chain_maxlen = \
(tbl->num_items >> (tbl->log2_num_buckets+1U)) + \
(((tbl->num_items & ((tbl->num_buckets*2U)-1U)) != 0U) ? 1U : 0U); \
tbl->nonideal_items = 0; \
for (_he_bkt_i = 0; _he_bkt_i < tbl->num_buckets; _he_bkt_i++) { \
_he_thh = tbl->buckets[ _he_bkt_i ].hh_head; \
while (_he_thh != NULL) { \
_he_hh_nxt = _he_thh->hh_next; \
HASH_TO_BKT(_he_thh->hashv, tbl->num_buckets * 2U, _he_bkt); \
_he_newbkt = &(_he_new_buckets[_he_bkt]); \
if (++(_he_newbkt->count) > tbl->ideal_chain_maxlen) { \
tbl->nonideal_items++; \
_he_newbkt->expand_mult = _he_newbkt->count / tbl->ideal_chain_maxlen; \
} \
_he_thh->hh_prev = NULL; \
_he_thh->hh_next = _he_newbkt->hh_head; \
if (_he_newbkt->hh_head != NULL) { \
_he_newbkt->hh_head->hh_prev = _he_thh; \
} \
_he_newbkt->hh_head = _he_thh; \
_he_thh = _he_hh_nxt; \
} \
} \
uthash_free(tbl->buckets, tbl->num_buckets * sizeof(struct UT_hash_bucket)); \
tbl->num_buckets *= 2U; \
tbl->log2_num_buckets++; \
tbl->buckets = _he_new_buckets; \
tbl->ineff_expands = (tbl->nonideal_items > (tbl->num_items >> 1)) ? \
(tbl->ineff_expands+1U) : 0U; \
if (tbl->ineff_expands > 1U) { \
tbl->noexpand = 1; \
uthash_noexpand_fyi(tbl); \
} \
uthash_expand_fyi(tbl); \
} while (0)
/* This is an adaptation of Simon Tatham's O(n log(n)) mergesort */
/* Note that HASH_SORT assumes the hash handle name to be hh.
* HASH_SRT was added to allow the hash handle name to be passed in. */
#define HASH_SORT(head,cmpfcn) HASH_SRT(hh,head,cmpfcn)
#define HASH_SRT(hh,head,cmpfcn) \
do { \
unsigned _hs_i; \
unsigned _hs_looping,_hs_nmerges,_hs_insize,_hs_psize,_hs_qsize; \
struct UT_hash_handle *_hs_p, *_hs_q, *_hs_e, *_hs_list, *_hs_tail; \
if (head != NULL) { \
_hs_insize = 1; \
_hs_looping = 1; \
_hs_list = &((head)->hh); \
while (_hs_looping != 0U) { \
_hs_p = _hs_list; \
_hs_list = NULL; \
_hs_tail = NULL; \
_hs_nmerges = 0; \
while (_hs_p != NULL) { \
_hs_nmerges++; \
_hs_q = _hs_p; \
_hs_psize = 0; \
for (_hs_i = 0; _hs_i < _hs_insize; ++_hs_i) { \
_hs_psize++; \
_hs_q = ((_hs_q->next != NULL) ? \
HH_FROM_ELMT((head)->hh.tbl, _hs_q->next) : NULL); \
if (_hs_q == NULL) { \
break; \
} \
} \
_hs_qsize = _hs_insize; \
while ((_hs_psize != 0U) || ((_hs_qsize != 0U) && (_hs_q != NULL))) { \
if (_hs_psize == 0U) { \
_hs_e = _hs_q; \
_hs_q = ((_hs_q->next != NULL) ? \
HH_FROM_ELMT((head)->hh.tbl, _hs_q->next) : NULL); \
_hs_qsize--; \
} else if ((_hs_qsize == 0U) || (_hs_q == NULL)) { \
_hs_e = _hs_p; \
if (_hs_p != NULL) { \
_hs_p = ((_hs_p->next != NULL) ? \
HH_FROM_ELMT((head)->hh.tbl, _hs_p->next) : NULL); \
} \
_hs_psize--; \
} else if ((cmpfcn( \
DECLTYPE(head)(ELMT_FROM_HH((head)->hh.tbl, _hs_p)), \
DECLTYPE(head)(ELMT_FROM_HH((head)->hh.tbl, _hs_q)) \
)) <= 0) { \
_hs_e = _hs_p; \
if (_hs_p != NULL) { \
_hs_p = ((_hs_p->next != NULL) ? \
HH_FROM_ELMT((head)->hh.tbl, _hs_p->next) : NULL); \
} \
_hs_psize--; \
} else { \
_hs_e = _hs_q; \
_hs_q = ((_hs_q->next != NULL) ? \
HH_FROM_ELMT((head)->hh.tbl, _hs_q->next) : NULL); \
_hs_qsize--; \
} \
if ( _hs_tail != NULL ) { \
_hs_tail->next = ((_hs_e != NULL) ? \
ELMT_FROM_HH((head)->hh.tbl, _hs_e) : NULL); \
} else { \
_hs_list = _hs_e; \
} \
if (_hs_e != NULL) { \
_hs_e->prev = ((_hs_tail != NULL) ? \
ELMT_FROM_HH((head)->hh.tbl, _hs_tail) : NULL); \
} \
_hs_tail = _hs_e; \
} \
_hs_p = _hs_q; \
} \
if (_hs_tail != NULL) { \
_hs_tail->next = NULL; \
} \
if (_hs_nmerges <= 1U) { \
_hs_looping = 0; \
(head)->hh.tbl->tail = _hs_tail; \
DECLTYPE_ASSIGN(head, ELMT_FROM_HH((head)->hh.tbl, _hs_list)); \
} \
_hs_insize *= 2U; \
} \
HASH_FSCK(hh, head, "HASH_SRT"); \
} \
} while (0)
/* This function selects items from one hash into another hash.
* The end result is that the selected items have dual presence
* in both hashes. There is no copy of the items made; rather
* they are added into the new hash through a secondary hash
* hash handle that must be present in the structure. */
#define HASH_SELECT(hh_dst, dst, hh_src, src, cond) \
do { \
unsigned _src_bkt, _dst_bkt; \
void *_last_elt = NULL, *_elt; \
UT_hash_handle *_src_hh, *_dst_hh, *_last_elt_hh=NULL; \
ptrdiff_t _dst_hho = ((char*)(&(dst)->hh_dst) - (char*)(dst)); \
if ((src) != NULL) { \
for (_src_bkt=0; _src_bkt < (src)->hh_src.tbl->num_buckets; _src_bkt++) { \
for (_src_hh = (src)->hh_src.tbl->buckets[_src_bkt].hh_head; \
_src_hh != NULL; \
_src_hh = _src_hh->hh_next) { \
_elt = ELMT_FROM_HH((src)->hh_src.tbl, _src_hh); \
if (cond(_elt)) { \
_dst_hh = (UT_hash_handle*)(((char*)_elt) + _dst_hho); \
_dst_hh->key = _src_hh->key; \
_dst_hh->keylen = _src_hh->keylen; \
_dst_hh->hashv = _src_hh->hashv; \
_dst_hh->prev = _last_elt; \
_dst_hh->next = NULL; \
if (_last_elt_hh != NULL) { \
_last_elt_hh->next = _elt; \
} \
if ((dst) == NULL) { \
DECLTYPE_ASSIGN(dst, _elt); \
HASH_MAKE_TABLE(hh_dst, dst); \
} else { \
_dst_hh->tbl = (dst)->hh_dst.tbl; \
} \
HASH_TO_BKT(_dst_hh->hashv, _dst_hh->tbl->num_buckets, _dst_bkt); \
HASH_ADD_TO_BKT(_dst_hh->tbl->buckets[_dst_bkt], _dst_hh); \
HASH_BLOOM_ADD(_dst_hh->tbl, _dst_hh->hashv); \
(dst)->hh_dst.tbl->num_items++; \
_last_elt = _elt; \
_last_elt_hh = _dst_hh; \
} \
} \
} \
} \
HASH_FSCK(hh_dst, dst, "HASH_SELECT"); \