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
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://www.hdfgroup.org/licenses. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*keep this declaration near the top of this file -RPM*/
static const char *FileHeader = "\n\
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\n\
* Copyright by The HDF Group. *\n\
* Copyright by the Board of Trustees of the University of Illinois. *\n\
* All rights reserved. *\n\
* *\n\
* This file is part of HDF5. The full HDF5 copyright notice, including *\n\
* terms governing use, modification, and redistribution, is contained in *\n\
* the COPYING file, which can be found at the root of the source code *\n\
* distribution tree, or in https://www.hdfgroup.org/licenses. *\n\
* If you do not have access to either file, you may request a copy from *\n\
* help@hdfgroup.org. *\n\
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *";
/*
* Purpose: This code was borrowed heavily from the `detect.c'
* program in the AIO distribution from Lawrence
* Livermore National Laboratory.
*
* Detects machine byte order and floating point
* format and generates a C source file (H5Tinit.c)
* to describe those parameters.
*
* Assumptions: We have an ANSI compiler. We're on a Unix like
* system or configure has detected those Unix
* features which aren't available. We're not
* running on a Vax or other machine with mixed
* endianness.
*-------------------------------------------------------------------------
*/
#undef NDEBUG
#include "H5private.h"
/* Do NOT use HDfprintf in this file as it is not linked with the library,
* which contains the H5system.c file in which the function is defined.
*/
#include "H5Tpublic.h"
#include "H5Rpublic.h"
/* Disable warning about cast increasing the alignment of the target type,
* that's _exactly_ what this code is probing. -QAK
*/
H5_GCC_DIAG_OFF("cast-align")
#if defined(__has_attribute)
#if __has_attribute(no_sanitize_address)
#define HDF_NO_UBSAN __attribute__((no_sanitize_address))
#else
#define HDF_NO_UBSAN
#endif
#else
#define HDF_NO_UBSAN
#endif
#define MAXDETECT 64
/* The ALIGNMENT test code may generate the SIGBUS, SIGSEGV, or SIGILL signals.
* We use setjmp/longjmp in the signal handlers for recovery. But setjmp/longjmp
* do not necessary restore the signal blocking status while sigsetjmp/siglongjmp
* do. If sigsetjmp/siglongjmp are not supported, need to use sigprocmask to
* unblock the signal before doing longjmp.
*/
/* Define H5SETJMP/H5LONGJMP depending on if sigsetjmp/siglongjmp are */
/* supported. */
#if defined(H5_HAVE_SIGSETJMP) && defined(H5_HAVE_SIGLONGJMP)
/* Always save blocked signals to be restored by siglongjmp. */
#define H5JMP_BUF sigjmp_buf
#define H5SETJMP(buf) HDsigsetjmp(buf, 1)
#define H5LONGJMP(buf, val) HDsiglongjmp(buf, val)
#define H5HAVE_SIGJMP /* sigsetjmp/siglongjmp are supported. */
#elif defined(H5_HAVE_LONGJMP)
#define H5JMP_BUF jmp_buf
#define H5SETJMP(buf) HDsetjmp(buf)
#define H5LONGJMP(buf, val) HDlongjmp(buf, val)
#endif
/* ALIGNMENT and signal-handling status codes */
#define STA_NoALIGNMENT 0x0001 /* No ALIGNMENT Test */
#define STA_NoHandlerVerify 0x0002 /* No signal handler Tests */
/*
* This structure holds information about a type that
* was detected.
*/
typedef struct detected_t {
const char * varname;
unsigned int size; /* total byte size */
unsigned int precision; /* meaningful bits */
unsigned int offset; /* bit offset to meaningful bits */
int perm[32]; /* for detection of byte order */
hbool_t is_vax; /* for vax (float & double) only */
unsigned int sign; /* location of sign bit */
unsigned int mpos, msize, imp; /* information about mantissa */
unsigned int epos, esize; /* information about exponent */
unsigned long bias; /* exponent bias for floating pt */
unsigned int align; /* required byte alignment */
unsigned int comp_align; /* alignment for structure */
} detected_t;
/* This structure holds structure alignment for pointers, hvl_t, hobj_ref_t,
* hdset_reg_ref_t */
typedef struct malign_t {
const char * name;
unsigned int comp_align; /* alignment for structure */
} malign_t;
FILE *rawoutstream = NULL;
/* global variables types detection code */
H5_GCC_DIAG_OFF("larger-than=")
static detected_t d_g[MAXDETECT];
H5_GCC_DIAG_ON("larger-than=")
static malign_t m_g[MAXDETECT];
static volatile int nd_g = 0, na_g = 0;
static void print_results(int nd, detected_t *d, int na, malign_t *m);
static void iprint(detected_t *);
static int byte_cmp(int, const void *, const void *, const unsigned char *);
static unsigned int bit_cmp(unsigned int, int *, void *, void *, const unsigned char *);
static void fix_order(int, int, int *, const char **);
static unsigned int imp_bit(unsigned int, int *, void *, void *, const unsigned char *);
static unsigned int find_bias(unsigned int, unsigned int, int *, void *);
static void precision(detected_t *);
static void print_header(void);
static void detect_C89_integers(void);
static void detect_C89_floats(void);
static void detect_C99_integers(void);
static void detect_C99_floats(void);
static void detect_C99_integers8(void);
static void detect_C99_integers16(void);
static void detect_C99_integers32(void);
static void detect_C99_integers64(void);
static void detect_alignments(void);
static unsigned int align_g[] = {1, 2, 4, 8, 16};
static int align_status_g = 0; /* ALIGNMENT Signal Status */
static int sigbus_handler_called_g = 0; /* how many times called */
static int sigsegv_handler_called_g = 0; /* how many times called */
static int sigill_handler_called_g = 0; /* how many times called */
static int signal_handler_tested_g = 0; /* how many times tested */
#if defined(H5SETJMP) && defined(H5_HAVE_SIGNAL)
static int verify_signal_handlers(int signum, void (*handler)(int));
#endif
#ifdef H5JMP_BUF
static H5JMP_BUF jbuf_g;
#endif
/*-------------------------------------------------------------------------
* Function: precision
*
* Purpose: Determine the precision and offset.
*
* Return: void
*-------------------------------------------------------------------------
*/
static void
precision(detected_t *d)
{
unsigned int n;
if (0 == d->msize) {
/*
* An integer. The permutation can have negative values at the
* beginning or end which represent padding of bytes. We must adjust
* the precision and offset accordingly.
*/
if (d->perm[0] < 0) {
/*
* Lower addresses are padded.
*/
for (n = 0; n < d->size && d->perm[n] < 0; n++)
/*void*/;
d->precision = 8 * (d->size - n);
d->offset = 0;
}
else if (d->perm[d->size - 1] < 0) {
/*
* Higher addresses are padded.
*/
for (n = 0; n < d->size && d->perm[d->size - (n + 1)]; n++)
/*void*/;
d->precision = 8 * (d->size - n);
d->offset = 8 * n;
}
else {
/*
* No padding.
*/
d->precision = 8 * d->size;
d->offset = 0;
}
}
else {
/* A floating point */
d->offset = MIN3(d->mpos, d->epos, d->sign);
d->precision = d->msize + d->esize + 1;
}
}
/*-------------------------------------------------------------------------
* Function: DETECT_I/DETECT_BYTE
*
* Purpose: These macro takes a type like `int' and a base name like
* `nati' and detects the byte order. The VAR is used to
* construct the names of the C variables defined.
*
* DETECT_I is used for types that are larger than one byte,
* DETECT_BYTE is used for types that are exactly one byte.
*
* Return: void
*
*-------------------------------------------------------------------------
*/
#define DETECT_I_BYTE_CORE(TYPE, VAR, INFO, DETECT_TYPE) \
{ \
DETECT_TYPE _v; \
int _i, _j; \
unsigned char *_x; \
\
HDmemset(&INFO, 0, sizeof(INFO)); \
INFO.varname = #VAR; \
INFO.size = sizeof(TYPE); \
\
for (_i = sizeof(DETECT_TYPE), _v = 0; _i > 0; --_i) \
_v = (DETECT_TYPE)((DETECT_TYPE)(_v << 8) + (DETECT_TYPE)_i); \
\
for (_i = 0, _x = (unsigned char *)&_v; _i < (signed)sizeof(DETECT_TYPE); _i++) { \
_j = (*_x++) - 1; \
HDassert(_j < (signed)sizeof(DETECT_TYPE)); \
INFO.perm[_i] = _j; \
} /* end for */ \
\
INFO.sign = ('U' != *(#VAR)); \
precision(&(INFO)); \
ALIGNMENT(TYPE, INFO); \
if (!HDstrcmp(INFO.varname, "SCHAR") || !HDstrcmp(INFO.varname, "SHORT") || \
!HDstrcmp(INFO.varname, "INT") || !HDstrcmp(INFO.varname, "LONG") || \
!HDstrcmp(INFO.varname, "LLONG")) { \
COMP_ALIGNMENT(TYPE, INFO.comp_align); \
} \
}
#define DETECT_BYTE(TYPE, VAR, INFO) \
{ \
HDcompile_assert(sizeof(TYPE) == 1); \
\
DETECT_I_BYTE_CORE(TYPE, VAR, INFO, int) \
}
#define DETECT_I(TYPE, VAR, INFO) \
{ \
HDcompile_assert(sizeof(TYPE) > 1); \
\
DETECT_I_BYTE_CORE(TYPE, VAR, INFO, TYPE) \
}
/*-------------------------------------------------------------------------
* Function: DETECT_F
*
* Purpose: This macro takes a floating point type like `double' and
* a base name like `natd' and detects byte order, mantissa
* location, exponent location, sign bit location, presence or
* absence of implicit mantissa bit, and exponent bias and
* initializes a detected_t structure with those properties.
*-------------------------------------------------------------------------
*/
#define DETECT_F(TYPE, VAR, INFO) \
{ \
TYPE _v1, _v2, _v3; \
unsigned char _buf1[sizeof(TYPE)], _buf3[sizeof(TYPE)]; \
unsigned char _pad_mask[sizeof(TYPE)]; \
unsigned char _byte_mask; \
int _i, _j, _last = (-1); \
const char * _mesg; \
\
HDmemset(&INFO, 0, sizeof(INFO)); \
INFO.varname = #VAR; \
INFO.size = sizeof(TYPE); \
\
/* Initialize padding mask */ \
HDmemset(_pad_mask, 0, sizeof(_pad_mask)); \
\
/* Padding bits. Set a variable to 4.0, then flip each bit and see if \
* the modified variable is equal ("==") to the original. Build a \
* padding bitmask to indicate which bits in the type are padding (i.e. \
* have no effect on the value and should be ignored by subsequent \
* steps). This is necessary because padding bits can change arbitrarily \
* and interfere with detection of the various properties below unless we \
* know to ignore them. */ \
_v1 = (TYPE)4.0L; \
HDmemcpy(_buf1, (const void *)&_v1, sizeof(TYPE)); \
for (_i = 0; _i < (int)sizeof(TYPE); _i++) \
for (_byte_mask = (unsigned char)1; _byte_mask; _byte_mask = (unsigned char)(_byte_mask << 1)) { \
_buf1[_i] ^= _byte_mask; \
HDmemcpy((void *)&_v2, (const void *)_buf1, sizeof(TYPE)); \
H5_GCC_DIAG_OFF("float-equal") \
if (_v1 != _v2) \
_pad_mask[_i] |= _byte_mask; \
H5_GCC_DIAG_ON("float-equal") \
_buf1[_i] ^= _byte_mask; \
} /* end for */ \
\
/* Byte Order */ \
for (_i = 0, _v1 = (TYPE)0.0L, _v2 = (TYPE)1.0L; _i < (int)sizeof(TYPE); _i++) { \
_v3 = _v1; \
_v1 += _v2; \
_v2 /= (TYPE)256.0L; \
HDmemcpy(_buf1, (const void *)&_v1, sizeof(TYPE)); \
HDmemcpy(_buf3, (const void *)&_v3, sizeof(TYPE)); \
_j = byte_cmp(sizeof(TYPE), _buf3, _buf1, _pad_mask); \
if (_j >= 0) { \
INFO.perm[_i] = _j; \
_last = _i; \
} \
} \
fix_order(sizeof(TYPE), _last, INFO.perm, (const char **)&_mesg); \
\
if (!HDstrcmp(_mesg, "VAX")) \
INFO.is_vax = TRUE; \
\
/* Implicit mantissa bit */ \
_v1 = (TYPE)0.5L; \
_v2 = (TYPE)1.0L; \
INFO.imp = imp_bit(sizeof(TYPE), INFO.perm, &_v1, &_v2, _pad_mask); \
\
/* Sign bit */ \
_v1 = (TYPE)1.0L; \
_v2 = (TYPE)-1.0L; \
INFO.sign = bit_cmp(sizeof(TYPE), INFO.perm, &_v1, &_v2, _pad_mask); \
\
/* Mantissa */ \
INFO.mpos = 0; \
\
_v1 = (TYPE)1.0L; \
_v2 = (TYPE)1.5L; \
INFO.msize = bit_cmp(sizeof(TYPE), INFO.perm, &_v1, &_v2, _pad_mask); \
INFO.msize += 1 + (unsigned int)(INFO.imp ? 0 : 1) - INFO.mpos; \
\
/* Exponent */ \
INFO.epos = INFO.mpos + INFO.msize; \
\
INFO.esize = INFO.sign - INFO.epos; \
\
_v1 = (TYPE)1.0L; \
INFO.bias = find_bias(INFO.epos, INFO.esize, INFO.perm, &_v1); \
precision(&(INFO)); \
ALIGNMENT(TYPE, INFO); \
if (!HDstrcmp(INFO.varname, "FLOAT") || !HDstrcmp(INFO.varname, "DOUBLE") || \
!HDstrcmp(INFO.varname, "LDOUBLE")) { \
COMP_ALIGNMENT(TYPE, INFO.comp_align); \
} \
}
/*-------------------------------------------------------------------------
* Function: DETECT_M
*
* Purpose: This macro takes only miscellaneous structures or pointer
* (pointer, hvl_t, hobj_ref_t, hdset_reg_ref_t). It
* constructs the names and decides the alignment in structure.
*
* Return: void
*-------------------------------------------------------------------------
*/
#define DETECT_M(TYPE, VAR, INFO) \
{ \
INFO.name = #VAR; \
COMP_ALIGNMENT(TYPE, INFO.comp_align); \
}
/* Detect alignment for C structure */
#define COMP_ALIGNMENT(TYPE, COMP_ALIGN) \
{ \
struct { \
char c; \
TYPE x; \
} s; \
\
COMP_ALIGN = (unsigned int)((char *)(&(s.x)) - (char *)(&s)); \
}
#if defined(H5SETJMP) && defined(H5_HAVE_SIGNAL)
#define ALIGNMENT(TYPE, INFO) \
{ \
char *volatile _buf = NULL; \
TYPE _val = 1, _val2; \
volatile size_t _ano = 0; \
void (*_handler)(int) = HDsignal(SIGBUS, sigbus_handler); \
void (*_handler2)(int) = HDsignal(SIGSEGV, sigsegv_handler); \
void (*_handler3)(int) = HDsignal(SIGILL, sigill_handler); \
\
_buf = (char *)HDmalloc(sizeof(TYPE) + align_g[NELMTS(align_g) - 1]); \
if (H5SETJMP(jbuf_g)) \
_ano++; \
if (_ano < NELMTS(align_g)) { \
*((TYPE *)(_buf + align_g[_ano])) = _val; /*possible SIGBUS or SEGSEGV*/ \
_val2 = *((TYPE *)(_buf + align_g[_ano])); /*possible SIGBUS or SEGSEGV*/ \
/* Cray Check: This section helps detect alignment on Cray's */ \
/* vector machines (like the SV1) which mask off */ \
/* pointer values when pointing to non-word aligned */ \
/* locations with pointers that are supposed to be */ \
/* word aligned. -QAK */ \
HDmemset(_buf, 0xff, sizeof(TYPE) + align_g[NELMTS(align_g) - 1]); \
/*How to handle VAX types?*/ \
if (INFO.perm[0]) /* Big-Endian */ \
HDmemcpy(_buf + align_g[_ano] + (INFO.size - ((INFO.offset + INFO.precision) / 8)), \
((char *)&_val) + (INFO.size - ((INFO.offset + INFO.precision) / 8)), \
(size_t)(INFO.precision / 8)); \
else /* Little-Endian */ \
HDmemcpy(_buf + align_g[_ano] + (INFO.offset / 8), ((char *)&_val) + (INFO.offset / 8), \
(size_t)(INFO.precision / 8)); \
_val2 = *((TYPE *)(_buf + align_g[_ano])); \
H5_GCC_DIAG_OFF("float-equal") \
if (_val != _val2) \
H5LONGJMP(jbuf_g, 1); \
H5_GCC_DIAG_ON("float-equal") \
/* End Cray Check */ \
(INFO.align) = align_g[_ano]; \
} \
else { \
(INFO.align) = 0; \
fprintf(stderr, "unable to calculate alignment for %s\n", #TYPE); \
} \
HDfree(_buf); \
HDsignal(SIGBUS, _handler); /*restore original handler*/ \
HDsignal(SIGSEGV, _handler2); /*restore original handler*/ \
HDsignal(SIGILL, _handler3); /*restore original handler*/ \
}
#else
#define ALIGNMENT(TYPE, INFO) \
{ \
align_status_g |= STA_NoALIGNMENT; \
(INFO.align) = 0; \
}
#endif
#if defined(H5LONGJMP) && defined(H5_HAVE_SIGNAL)
/*-------------------------------------------------------------------------
* Function: sigsegv_handler
*
* Purpose: Handler for SIGSEGV. We use signal() instead of sigaction()
* because it's more portable to non-Posix systems. Although
* it's not nearly as nice to work with, it does the job for
* this simple stuff.
*
* Return: Returns via H5LONGJMP to jbuf_g.
*-------------------------------------------------------------------------
*/
static void
sigsegv_handler(int H5_ATTR_UNUSED signo)
{
#if !defined(H5HAVE_SIGJMP) && defined(H5_HAVE_SIGPROCMASK)
/* Use sigprocmask to unblock the signal if sigsetjmp/siglongjmp are not */
/* supported. */
sigset_t set;
HDsigemptyset(&set);
HDsigaddset(&set, SIGSEGV);
HDsigprocmask(SIG_UNBLOCK, &set, NULL);
#endif
sigsegv_handler_called_g++;
HDsignal(SIGSEGV, sigsegv_handler);
H5LONGJMP(jbuf_g, SIGSEGV);
}
#endif
#if defined(H5LONGJMP) && defined(H5_HAVE_SIGNAL)
/*-------------------------------------------------------------------------
* Function: sigbus_handler
*
* Purpose: Handler for SIGBUS. We use signal() instead of sigaction()
* because it's more portable to non-Posix systems. Although
* it's not nearly as nice to work with, it does the job for
* this simple stuff.
*
* Return: Returns via H5LONGJMP to jbuf_g.
*-------------------------------------------------------------------------
*/
static void
sigbus_handler(int H5_ATTR_UNUSED signo)
{
#if !defined(H5HAVE_SIGJMP) && defined(H5_HAVE_SIGPROCMASK)
/* Use sigprocmask to unblock the signal if sigsetjmp/siglongjmp are not */
/* supported. */
sigset_t set;
HDsigemptyset(&set);
HDsigaddset(&set, SIGBUS);
HDsigprocmask(SIG_UNBLOCK, &set, NULL);
#endif
sigbus_handler_called_g++;
HDsignal(SIGBUS, sigbus_handler);
H5LONGJMP(jbuf_g, SIGBUS);
}
#endif
#if defined(H5LONGJMP) && defined(H5_HAVE_SIGNAL)
/*-------------------------------------------------------------------------
* Function: sigill_handler
*
* Purpose: Handler for SIGILL. We use signal() instead of sigaction()
* because it's more portable to non-Posix systems. Although
* it's not nearly as nice to work with, it does the job for
* this simple stuff.
*
* Return: Returns via H5LONGJMP to jbuf_g.
*-------------------------------------------------------------------------
*/
static void
sigill_handler(int H5_ATTR_UNUSED signo)
{
#if !defined(H5HAVE_SIGJMP) && defined(H5_HAVE_SIGPROCMASK)
/* Use sigprocmask to unblock the signal if sigsetjmp/siglongjmp are not */
/* supported. */
sigset_t set;
HDsigemptyset(&set);
HDsigaddset(&set, SIGILL);
HDsigprocmask(SIG_UNBLOCK, &set, NULL);
#endif
sigill_handler_called_g++;
HDsignal(SIGILL, sigill_handler);
H5LONGJMP(jbuf_g, SIGILL);
}
#endif
/*-------------------------------------------------------------------------
* Function: print_results
*
* Purpose: Prints information about the detected data types.
*
* Return: void
*-------------------------------------------------------------------------
*/
static void
print_results(int nd, detected_t *d, int na, malign_t *misc_align)
{
int byte_order = 0; /*byte order of data types*/
int i, j;
/* Include files */
fprintf(rawoutstream, "\
/****************/\n\
/* Module Setup */\n\
/****************/\n\
\n\
#define H5T_PACKAGE /*suppress error about including H5Tpkg.h*/\n\
\n\
\n\
/***********/\n\
/* Headers */\n\
/***********/\n\
#include \"H5private.h\" /* Generic Functions */\n\
#include \"H5Eprivate.h\" /* Error handling */\n\
#include \"H5FLprivate.h\" /* Free Lists */\n\
#include \"H5Iprivate.h\" /* IDs */\n\
#include \"H5Tpkg.h\" /* Datatypes */\n\
\n\
\n\
/****************/\n\
/* Local Macros */\n\
/****************/\n\
\n\
\n\
/******************/\n\
/* Local Typedefs */\n\
/******************/\n\
\n\
\n\
/********************/\n\
/* Package Typedefs */\n\
/********************/\n\
\n\
\n\
/********************/\n\
/* Local Prototypes */\n\
/********************/\n\
\n\
\n\
/********************/\n\
/* Public Variables */\n\
/********************/\n\
\n\
\n\
/*****************************/\n\
/* Library Private Variables */\n\
/*****************************/\n\
\n\
\n\
/*********************/\n\
/* Package Variables */\n\
/*********************/\n\
\n\
\n");
fprintf(rawoutstream, "\n\
/*******************/\n\
/* Local Variables */\n\
/*******************/\n\
\n");
/* The interface initialization function */
fprintf(rawoutstream, "\n\
\n\
/*-------------------------------------------------------------------------\n\
* Function: H5TN_init_interface\n\
*\n\
* Purpose: Initialize pre-defined native datatypes from code generated\n\
* during the library configuration by H5detect.\n\
*\n\
* Return: Success: non-negative\n\
* Failure: negative\n\
*\n\
* Programmer: Robb Matzke\n\
* Wednesday, December 16, 1998\n\
*\n\
*-------------------------------------------------------------------------\n\
*/\n\
herr_t\n\
H5TN_init_interface(void)\n\
{\n\
H5T_t *dt = NULL;\n\
herr_t ret_value = SUCCEED;\n\
\n\
FUNC_ENTER_NOAPI(FAIL)\n");
for (i = 0; i < nd; i++) {
/* The native endianness of this machine */
/* The INFO.perm now contains `-1' for bytes that aren't used and
* are always zero. This happens on the Cray for `short' where
* sizeof(short) is 8, but only the low-order 4 bytes are ever used.
*/
if (d[i].is_vax) /* the type is a VAX floating number */
byte_order = -1;
else {
for (j = 0; j < 32; j++) {
/*Find the 1st containing valid data*/
if (d[i].perm[j] > -1) {
byte_order = d[i].perm[j];
break;
}
}
}
/* Print a comment to describe this section of definitions. */
fprintf(rawoutstream, "\n /*\n");
iprint(d + i);
fprintf(rawoutstream, " */\n");
/* The part common to fixed and floating types */
fprintf(rawoutstream, "\
if(NULL == (dt = H5T__alloc()))\n\
HGOTO_ERROR(H5E_DATATYPE, H5E_NOSPACE, FAIL, \"datatype allocation failed\")\n\
dt->shared->state = H5T_STATE_IMMUTABLE;\n\
dt->shared->type = H5T_%s;\n\
dt->shared->size = %d;\n",
d[i].msize ? "FLOAT" : "INTEGER", /*class */
d[i].size); /*size */
if (byte_order == -1)
fprintf(rawoutstream, "\
dt->shared->u.atomic.order = H5T_ORDER_VAX;\n");
else if (byte_order == 0)
fprintf(rawoutstream, "\
dt->shared->u.atomic.order = H5T_ORDER_LE;\n");
else
fprintf(rawoutstream, "\
dt->shared->u.atomic.order = H5T_ORDER_BE;\n");
fprintf(rawoutstream, "\
dt->shared->u.atomic.offset = %d;\n\
dt->shared->u.atomic.prec = %d;\n\
dt->shared->u.atomic.lsb_pad = H5T_PAD_ZERO;\n\
dt->shared->u.atomic.msb_pad = H5T_PAD_ZERO;\n",
d[i].offset, /*offset */
d[i].precision); /*precision */
/*HDassert((d[i].perm[0]>0)==(byte_order>0));*/ /* Double-check that byte-order doesn't change */
if (0 == d[i].msize) {
/* The part unique to fixed point types */
fprintf(rawoutstream, "\
dt->shared->u.atomic.u.i.sign = H5T_SGN_%s;\n",
d[i].sign ? "2" : "NONE");
}
else {
/* The part unique to floating point types */
fprintf(rawoutstream, "\
dt->shared->u.atomic.u.f.sign = %d;\n\
dt->shared->u.atomic.u.f.epos = %d;\n\
dt->shared->u.atomic.u.f.esize = %d;\n\
dt->shared->u.atomic.u.f.ebias = 0x%08lx;\n\
dt->shared->u.atomic.u.f.mpos = %d;\n\
dt->shared->u.atomic.u.f.msize = %d;\n\
dt->shared->u.atomic.u.f.norm = H5T_NORM_%s;\n\
dt->shared->u.atomic.u.f.pad = H5T_PAD_ZERO;\n",
d[i].sign, /*sign location */
d[i].epos, /*exponent loc */
d[i].esize, /*exponent size */
(unsigned long)(d[i].bias), /*exponent bias */
d[i].mpos, /*mantissa loc */
d[i].msize, /*mantissa size */
d[i].imp ? "IMPLIED" : "NONE"); /*normalization */
}
/* Atomize the type */
fprintf(rawoutstream, "\
if((H5T_NATIVE_%s_g = H5I_register(H5I_DATATYPE, dt, FALSE)) < 0)\n\
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, \"can't register ID for built-in datatype\")\n",
d[i].varname);
fprintf(rawoutstream, " H5T_NATIVE_%s_ALIGN_g = %lu;\n", d[i].varname,
(unsigned long)(d[i].align));
/* Variables for alignment of compound datatype */
if (!HDstrcmp(d[i].varname, "SCHAR") || !HDstrcmp(d[i].varname, "SHORT") ||
!HDstrcmp(d[i].varname, "INT") || !HDstrcmp(d[i].varname, "LONG") ||
!HDstrcmp(d[i].varname, "LLONG") || !HDstrcmp(d[i].varname, "FLOAT") ||
!HDstrcmp(d[i].varname, "DOUBLE") || !HDstrcmp(d[i].varname, "LDOUBLE")) {
fprintf(rawoutstream, " H5T_NATIVE_%s_COMP_ALIGN_g = %lu;\n", d[i].varname,
(unsigned long)(d[i].comp_align));
}
}
/* Consider VAX a little-endian machine */
if (byte_order == 0 || byte_order == -1) {
fprintf(rawoutstream, "\n\
/* Set the native order for this machine */\n\
H5T_native_order_g = H5T_ORDER_%s;\n",
"LE");
}
else {
fprintf(rawoutstream, "\n\
/* Set the native order for this machine */\n\
H5T_native_order_g = H5T_ORDER_%s;\n",
"BE");
}
/* Structure alignment for pointers, hvl_t, hobj_ref_t, hdset_reg_ref_t */
fprintf(rawoutstream,
"\n /* Structure alignment for pointers, hvl_t, hobj_ref_t, hdset_reg_ref_t */\n");
for (j = 0; j < na; j++)
fprintf(rawoutstream, " H5T_%s_COMP_ALIGN_g = %lu;\n", misc_align[j].name,
(unsigned long)(misc_align[j].comp_align));
fprintf(rawoutstream, "\
\n\
done:\n\
if(ret_value < 0) {\n\
if(dt != NULL) {\n\
dt->shared = H5FL_FREE(H5T_shared_t, dt->shared);\n\
dt = H5FL_FREE(H5T_t, dt);\n\
} /* end if */\n\
} /* end if */\n\
\n\
FUNC_LEAVE_NOAPI(ret_value);\n} /* end H5TN_init_interface() */\n");
/* Print the ALIGNMENT and signal-handling status as comments */
fprintf(rawoutstream, "\n"
"/****************************************/\n"
"/* ALIGNMENT and signal-handling status */\n"
"/****************************************/\n");
if (align_status_g & STA_NoALIGNMENT)
fprintf(rawoutstream, "/* ALIGNAMENT test is not available */\n");
if (align_status_g & STA_NoHandlerVerify)
fprintf(rawoutstream, "/* Signal handlers verify test is not available */\n");
/* The following is available in H5pubconf.h. Printing them here for */
/* convenience. */
#ifdef H5_HAVE_SIGNAL
fprintf(rawoutstream, "/* Signal() support: yes */\n");
#else
fprintf(rawoutstream, "/* Signal() support: no */\n");
#endif
#ifdef H5_HAVE_SETJMP
fprintf(rawoutstream, "/* setjmp() support: yes */\n");
#else
fprintf(rawoutstream, "/* setjmp() support: no */\n");
#endif
#ifdef H5_HAVE_LONGJMP
fprintf(rawoutstream, "/* longjmp() support: yes */\n");
#else
fprintf(rawoutstream, "/* longjmp() support: no */\n");
#endif
#ifdef H5_HAVE_SIGSETJMP
fprintf(rawoutstream, "/* sigsetjmp() support: yes */\n");
#else
fprintf(rawoutstream, "/* sigsetjmp() support: no */\n");
#endif
#ifdef H5_HAVE_SIGLONGJMP
fprintf(rawoutstream, "/* siglongjmp() support: yes */\n");
#else
fprintf(rawoutstream, "/* siglongjmp() support: no */\n");
#endif
#ifdef H5_HAVE_SIGPROCMASK
fprintf(rawoutstream, "/* sigprocmask() support: yes */\n");
#else
fprintf(rawoutstream, "/* sigprocmask() support: no */\n");
#endif
/* Print the statics of signal handlers called for debugging */
fprintf(rawoutstream, "\n"
"/******************************/\n"
"/* signal handlers statistics */\n"
"/******************************/\n");
fprintf(rawoutstream, "/* signal_handlers tested: %d times */\n", signal_handler_tested_g);
fprintf(rawoutstream, "/* sigbus_handler called: %d times */\n", sigbus_handler_called_g);
fprintf(rawoutstream, "/* sigsegv_handler called: %d times */\n", sigsegv_handler_called_g);
fprintf(rawoutstream, "/* sigill_handler called: %d times */\n", sigill_handler_called_g);
} /* end print_results() */
/*-------------------------------------------------------------------------
* Function: iprint
*
* Purpose: Prints information about the fields of a floating point format.
*
* Return: void
*-------------------------------------------------------------------------
*/
static void
iprint(detected_t *d)
{
unsigned int pass;
for (pass = (d->size - 1) / 4;; --pass) {
unsigned int i, k;
/*
* Print the byte ordering above the bit fields.
*/
fprintf(rawoutstream, " * ");
for (i = MIN(pass * 4 + 3, d->size - 1); i >= pass * 4; --i) {
fprintf(rawoutstream, "%4d", d->perm[i]);
if (i > pass * 4)
HDfputs(" ", stdout);
if (!i)
break;
}
/*
* Print the bit fields
*/
fprintf(rawoutstream, "\n * ");
for (i = MIN(pass * 4 + 3, d->size - 1), k = MIN(pass * 32 + 31, 8 * d->size - 1); i >= pass * 4;
--i) {
unsigned int j;
for (j = 8; j > 0; --j) {
if (k == d->sign && d->msize) {
HDfputc('S', rawoutstream);
}
else if (k >= d->epos && k < d->epos + d->esize) {
HDfputc('E', rawoutstream);
}
else if (k >= d->mpos && k < d->mpos + d->msize) {
HDfputc('M', rawoutstream);
}
else if (d->msize) {
HDfputc('?', rawoutstream); /*unknown floating point bit */
}
else if (d->sign) {
HDfputc('I', rawoutstream);
}
else {
HDfputc('U', rawoutstream);
}
--k;
}
if (i > pass * 4)
HDfputc(' ', rawoutstream);
if (!i)
break;
}
HDfputc('\n', rawoutstream);
if (!pass)
break;
}
/*
* Is there an implicit bit in the mantissa.
*/
if (d->msize) {
fprintf(rawoutstream, " * Implicit bit? %s\n", d->imp ? "yes" : "no");
}
/*
* Alignment
*/
if (0 == d->align) {
fprintf(rawoutstream, " * Alignment: NOT CALCULATED\n");
}
else if (1 == d->align) {
fprintf(rawoutstream, " * Alignment: none\n");
}
else {
fprintf(rawoutstream, " * Alignment: %lu\n", (unsigned long)(d->align));
}
}
/*-------------------------------------------------------------------------
* Function: byte_cmp
*
* Purpose: Compares two chunks of memory A and B and returns the
* byte index into those arrays of the first byte that
* differs between A and B. Ignores differences where the
* corresponding bit in pad_mask is set to 0.
*
* Return: Success: Index of differing byte.
* Failure: -1 if all bytes are the same.
*-------------------------------------------------------------------------
*/
static int
byte_cmp(int n, const void *_a, const void *_b, const unsigned char *pad_mask)
{
int i;
const unsigned char *a = (const unsigned char *)_a;
const unsigned char *b = (const unsigned char *)_b;
for (i = 0; i < n; i++)
if ((a[i] & pad_mask[i]) != (b[i] & pad_mask[i]))
return i;
return -1;
}
/*-------------------------------------------------------------------------
* Function: bit_cmp
*
* Purpose: Compares two bit vectors and returns the index for the
* first bit that differs between the two vectors. The
* size of the vector is NBYTES. PERM is a mapping from
* actual order to little endian. Ignores differences where
* the corresponding bit in pad_mask is set to 0.
*
* Return: Index of first differing bit.
*
*-------------------------------------------------------------------------
*/
static unsigned int
bit_cmp(unsigned int nbytes, int *perm, void *_a, void *_b, const unsigned char *pad_mask)
{
unsigned int i;
unsigned char *a = (unsigned char *)_a;
unsigned char *b = (unsigned char *)_b;
unsigned char aa, bb;
for (i = 0; i < nbytes; i++) {
HDassert(perm[i] < (int)nbytes);
if ((aa = (unsigned char)(a[perm[i]] & pad_mask[perm[i]])) !=
(bb = (unsigned char)(b[perm[i]] & pad_mask[perm[i]]))) {
unsigned int j;
for (j = 0; j < 8; j++, aa >>= 1, bb >>= 1) {
if ((aa & 1) != (bb & 1))
return i * 8 + j;
}
fprintf(stderr, "INTERNAL ERROR");
HDabort();
}
}
fprintf(stderr, "INTERNAL ERROR");
HDabort();
return 0;
}
/*-------------------------------------------------------------------------
* Function: fix_order
*
* Purpose: Given an array PERM with elements FIRST through LAST
* initialized with zero origin byte numbers, this function
* creates a permutation vector that maps the actual order
* of a floating point number to little-endian.
*
* This function assumes that the mantissa byte ordering
* implies the total ordering.
*
* Return: void
*-------------------------------------------------------------------------
*/
static void
fix_order(int n, int last, int *perm, const char **mesg)
{
int i;
if (last > 1) {
/*
* We have at least three points to consider.
*/
if (perm[last] < perm[last - 1] && perm[last - 1] < perm[last - 2]) {
/*
* Little endian.
*/
if (mesg)
*mesg = "Little-endian";
for (i = 0; i < n; i++)
perm[i] = i;
}
else if (perm[last] > perm[last - 1] && perm[last - 1] > perm[last - 2]) {
/*
* Big endian.
*/
if (mesg)
*mesg = "Big-endian";
for (i = 0; i < n; i++)
perm[i] = (n - 1) - i;
}
else {
/*
* Bi-endian machines like VAX.
* (NOTE: This is not an actual determination of the VAX-endianness.
* It could have some other endianness and fall into this
* case - JKM & QAK)
*/
HDassert(0 == n % 2);
if (mesg)
*mesg = "VAX";
for (i = 0; i < n; i += 2) {
perm[i] = (n - 2) - i;
perm[i + 1] = (n - 1) - i;
}
}
}
else {
fprintf(stderr, "Failed to detect byte order of %d-byte floating point.\n", n);
HDexit(1);
}
}
/*-------------------------------------------------------------------------
* Function: imp_bit
*
* Purpose: Looks for an implicit bit in the mantissa. The value
* of _A should be 1.0 and the value of _B should be 0.5.
* Some floating-point formats discard the most significant
* bit of the mantissa after normalizing since it will always
* be a one (except for 0.0). If this is true for the native
* floating point values stored in _A and _B then the function
* returns non-zero.
*
* This function assumes that the exponent occupies higher
* order bits than the mantissa and that the most significant
* bit of the mantissa is next to the least significant bit
* of the exponent.
*
*
* Return: Success: Non-zero if the most significant bit
* of the mantissa is discarded (ie, the
* mantissa has an implicit `one' as the
* most significant bit). Otherwise,
* returns zero.
*
* Failure: 1
*
*-------------------------------------------------------------------------
*/
static unsigned int
imp_bit(unsigned int n, int *perm, void *_a, void *_b, const unsigned char *pad_mask)
{
unsigned char *a = (unsigned char *)_a;
unsigned char *b = (unsigned char *)_b;
unsigned int changed, major, minor;
unsigned int msmb; /* most significant mantissa bit */
/*
* Look for the least significant bit that has changed between
* A and B. This is the least significant bit of the exponent.
*/
changed = bit_cmp(n, perm, a, b, pad_mask);
/*
* The bit to the right (less significant) of the changed bit should
* be the most significant bit of the mantissa. If it is non-zero
* then the format does not remove the leading `1' of the mantissa.
*/
msmb = changed - 1;
major = msmb / 8;
minor = msmb % 8;
return (a[perm[major]] >> minor) & 0x01 ? 0 : 1;
}
/*-------------------------------------------------------------------------
* Function: find_bias
*
* Purpose: Determines the bias of the exponent. This function should
* be called with _A having a value of `1'.
*
* Return: The exponent bias.
*
*-------------------------------------------------------------------------
*/
static unsigned int
find_bias(unsigned int epos, unsigned int esize, int *perm, void *_a)
{
unsigned char *a = (unsigned char *)_a;
unsigned char mask;
unsigned int b, shift = 0, nbits, bias = 0;
while (esize > 0) {
nbits = MIN(esize, (8 - epos % 8));
mask = (unsigned char)((1 << nbits) - 1);
b = (unsigned int)(a[perm[epos / 8]] >> (epos % 8)) & mask;
bias |= b << shift;
shift += nbits;
esize -= nbits;
epos += nbits;
}
return bias;
}
/*-------------------------------------------------------------------------
* Function: print_header
*
* Purpose: Prints the C file header for the generated file.
*
* Return: void
*-------------------------------------------------------------------------
*/
static void
print_header(void)
{
time_t now = HDtime(NULL);
struct tm * tm = HDlocaltime(&now);
char real_name[30];
char host_name[256];
int i;
const char *s;
#ifdef H5_HAVE_GETPWUID
struct passwd *pwd = NULL;
#else
int pwd = 1;
#endif
static const char *month_name[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
static const char *purpose = "\
This machine-generated source code contains\n\
information about the various integer and\n\
floating point numeric formats found on this\n\
architecture. The parameters below should be\n\
checked carefully and errors reported to the\n\
HDF5 maintainer.\n\
\n\
Each of the numeric formats listed below are\n\
printed from most significant bit to least\n\
significant bit even though the actual bytes\n\
might be stored in a different order in\n\
memory. The integers above each binary byte\n\
indicate the relative order of the bytes in\n\
memory; little-endian machines have\n\
decreasing numbers while big-endian machines\n\
have increasing numbers.\n\
\n\
The fields of the numbers are printed as\n\
letters with `S' for the mantissa sign bit,\n\
`M' for the mantissa magnitude, and `E' for\n\
the exponent. The exponent has an associated\n\
bias which can be subtracted to find the\n\
true exponent. The radix point is assumed\n\
to be before the first `M' bit. Any bit\n\
of a floating-point value not falling into one\n\
of these categories is printed as a question\n\
mark. Bits of integer types are printed as\n\
`I' for 2's complement and `U' for magnitude.\n\
\n\
If the most significant bit of the normalized\n\
mantissa (always a `1' except for `0.0') is\n\
not stored then an `implicit=yes' appears\n\
under the field description. In this case,\n\
the radix point is still assumed to be\n\
before the first `M' but after the implicit\n\
bit.\n";
/*
* The real name is the first item from the passwd gecos field.
*/
#ifdef H5_HAVE_GETPWUID
{
size_t n;
char * comma;
if ((pwd = HDgetpwuid(HDgetuid()))) {
if ((comma = HDstrchr(pwd->pw_gecos, ','))) {
n = MIN(sizeof(real_name) - 1, (unsigned)(comma - pwd->pw_gecos));
HDstrncpy(real_name, pwd->pw_gecos, n);
real_name[n] = '\0';
}
else {
HDstrncpy(real_name, pwd->pw_gecos, sizeof(real_name));
real_name[sizeof(real_name) - 1] = '\0';
}
}
else
real_name[0] = '\0';
}
#else
real_name[0] = '\0';
#endif
/*
* The FQDM of this host or the empty string.
*/
#ifdef H5_HAVE_GETHOSTNAME
if (HDgethostname(host_name, sizeof(host_name)) < 0) {
host_name[0] = '\0';
}
#else
host_name[0] = '\0';
#endif
/*
* The file header: warning, copyright notice, build information.
*/
fprintf(rawoutstream, "/* Generated automatically by H5detect -- do not edit */\n\n\n");
HDfputs(FileHeader, rawoutstream); /*the copyright notice--see top of this file */
fprintf(rawoutstream, " *\n * Created:\t\t%s %2d, %4d\n", month_name[tm->tm_mon], tm->tm_mday,
1900 + tm->tm_year);
if (pwd || real_name[0] || host_name[0]) {
fprintf(rawoutstream, " *\t\t\t");
if (real_name[0])
fprintf(rawoutstream, "%s <", real_name);
#ifdef H5_HAVE_GETPWUID
if (pwd)
HDfputs(pwd->pw_name, rawoutstream);
#endif
if (host_name[0])
fprintf(rawoutstream, "@%s", host_name);
if (real_name[0])
fprintf(rawoutstream, ">");
HDfputc('\n', rawoutstream);
}
fprintf(rawoutstream, " *\n * Purpose:\t\t");
for (s = purpose; *s; s++) {
HDfputc(*s, rawoutstream);
if ('\n' == *s && s[1])
fprintf(rawoutstream, " *\t\t\t");
}
fprintf(rawoutstream, " *\n * Modifications:\n *\n");
fprintf(rawoutstream, " *\tDO NOT MAKE MODIFICATIONS TO THIS FILE!\n");
fprintf(rawoutstream, " *\tIt was generated by code in `H5detect.c'.\n");
fprintf(rawoutstream, " *\n *");
for (i = 0; i < 73; i++)
HDfputc('-', rawoutstream);
fprintf(rawoutstream, "\n */\n\n");
}
/*-------------------------------------------------------------------------
* Function: detect_C89_integers
*
* Purpose: Detect C89 integer types
*
* Return: void
*-------------------------------------------------------------------------
*/
static void HDF_NO_UBSAN
detect_C89_integers(void)
{
DETECT_BYTE(signed char, SCHAR, d_g[nd_g]);
nd_g++;
DETECT_BYTE(unsigned char, UCHAR, d_g[nd_g]);
nd_g++;
DETECT_I(short, SHORT, d_g[nd_g]);
nd_g++;
DETECT_I(unsigned short, USHORT, d_g[nd_g]);
nd_g++;
DETECT_I(int, INT, d_g[nd_g]);
nd_g++;
DETECT_I(unsigned int, UINT, d_g[nd_g]);
nd_g++;
DETECT_I(long, LONG, d_g[nd_g]);
nd_g++;
DETECT_I(unsigned long, ULONG, d_g[nd_g]);
nd_g++;
}
/*-------------------------------------------------------------------------
* Function: detect_C89_floats
*
* Purpose: Detect C89 floating point types
*
* Return: void
*-------------------------------------------------------------------------
*/
static void HDF_NO_UBSAN
detect_C89_floats(void)
{
DETECT_F(float, FLOAT, d_g[nd_g]);
nd_g++;
DETECT_F(double, DOUBLE, d_g[nd_g]);
nd_g++;
}
/*-------------------------------------------------------------------------
* Function: detect_C99_integers8
*
* Purpose: Detect C99 8 bit integer types
*
* Return: void
*-------------------------------------------------------------------------
*/
static void HDF_NO_UBSAN
detect_C99_integers8(void)
{
#if H5_SIZEOF_INT8_T > 0
#if H5_SIZEOF_INT8_T == 1
DETECT_BYTE(int8_t, INT8, d_g[nd_g]);
nd_g++;
#else
DETECT_I(int8_t, INT8, d_g[nd_g]);
nd_g++;
#endif
#endif
#if H5_SIZEOF_UINT8_T > 0
#if H5_SIZEOF_UINT8_T == 1
DETECT_BYTE(uint8_t, UINT8, d_g[nd_g]);
nd_g++;
#else
DETECT_I(uint8_t, UINT8, d_g[nd_g]);
nd_g++;
#endif
#endif
#if H5_SIZEOF_INT_LEAST8_T > 0
#if H5_SIZEOF_INT_LEAST8_T == 1
DETECT_BYTE(int_least8_t, INT_LEAST8, d_g[nd_g]);
nd_g++;
#else
DETECT_I(int_least8_t, INT_LEAST8, d_g[nd_g]);
nd_g++;
#endif
#endif
#if H5_SIZEOF_UINT_LEAST8_T > 0
#if H5_SIZEOF_UINT_LEAST8_T == 1
DETECT_BYTE(uint_least8_t, UINT_LEAST8, d_g[nd_g]);
nd_g++;
#else
DETECT_I(uint_least8_t, UINT_LEAST8, d_g[nd_g]);
nd_g++;
#endif
#endif
#if H5_SIZEOF_INT_FAST8_T > 0
#if H5_SIZEOF_INT_FAST8_T == 1
DETECT_BYTE(int_fast8_t, INT_FAST8, d_g[nd_g]);
nd_g++;
#else
DETECT_I(int_fast8_t, INT_FAST8, d_g[nd_g]);
nd_g++;
#endif
#endif
#if H5_SIZEOF_UINT_FAST8_T > 0
#if H5_SIZEOF_UINT_FAST8_T == 1
DETECT_BYTE(uint_fast8_t, UINT_FAST8, d_g[nd_g]);
nd_g++;
#else
DETECT_I(uint_fast8_t, UINT_FAST8, d_g[nd_g]);
nd_g++;
#endif
#endif
}
/*-------------------------------------------------------------------------
* Function: detect_C99_integers16
*
* Purpose: Detect C99 16 bit integer types
*
* Return: void
*-------------------------------------------------------------------------
*/
static void HDF_NO_UBSAN
detect_C99_integers16(void)
{
#if H5_SIZEOF_INT16_T > 0
DETECT_I(int16_t, INT16, d_g[nd_g]);
nd_g++;
#endif
#if H5_SIZEOF_UINT16_T > 0
DETECT_I(uint16_t, UINT16, d_g[nd_g]);
nd_g++;
#endif
#if H5_SIZEOF_INT_LEAST16_T > 0
DETECT_I(int_least16_t, INT_LEAST16, d_g[nd_g]);
nd_g++;
#endif
#if H5_SIZEOF_UINT_LEAST16_T > 0
DETECT_I(uint_least16_t, UINT_LEAST16, d_g[nd_g]);
nd_g++;
#endif
#if H5_SIZEOF_INT_FAST16_T > 0
DETECT_I(int_fast16_t, INT_FAST16, d_g[nd_g]);
nd_g++;
#endif
#if H5_SIZEOF_UINT_FAST16_T > 0
DETECT_I(uint_fast16_t, UINT_FAST16, d_g[nd_g]);
nd_g++;
#endif
}
/*-------------------------------------------------------------------------
* Function: detect_C99_integers32
*
* Purpose: Detect C99 32 bit integer types
*
* Return: void
*-------------------------------------------------------------------------
*/
static void HDF_NO_UBSAN
detect_C99_integers32(void)
{
#if H5_SIZEOF_INT32_T > 0
DETECT_I(int32_t, INT32, d_g[nd_g]);
nd_g++;
#endif
#if H5_SIZEOF_UINT32_T > 0
DETECT_I(uint32_t, UINT32, d_g[nd_g]);
nd_g++;
#endif
#if H5_SIZEOF_INT_LEAST32_T > 0
DETECT_I(int_least32_t, INT_LEAST32, d_g[nd_g]);
nd_g++;
#endif
#if H5_SIZEOF_UINT_LEAST32_T > 0
DETECT_I(uint_least32_t, UINT_LEAST32, d_g[nd_g]);
nd_g++;
#endif
#if H5_SIZEOF_INT_FAST32_T > 0
DETECT_I(int_fast32_t, INT_FAST32, d_g[nd_g]);
nd_g++;
#endif
#if H5_SIZEOF_UINT_FAST32_T > 0
DETECT_I(uint_fast32_t, UINT_FAST32, d_g[nd_g]);
nd_g++;
#endif
}
/*-------------------------------------------------------------------------
* Function: detect_C99_integers64
*
* Purpose: Detect C99 64 bit integer types
*
* Return: void
*
*-------------------------------------------------------------------------
*/
static void HDF_NO_UBSAN
detect_C99_integers64(void)
{
#if H5_SIZEOF_INT64_T > 0
DETECT_I(int64_t, INT64, d_g[nd_g]);
nd_g++;
#endif
#if H5_SIZEOF_UINT64_T > 0
DETECT_I(uint64_t, UINT64, d_g[nd_g]);
nd_g++;
#endif
#if H5_SIZEOF_INT_LEAST64_T > 0
DETECT_I(int_least64_t, INT_LEAST64, d_g[nd_g]);
nd_g++;
#endif
#if H5_SIZEOF_UINT_LEAST64_T > 0
DETECT_I(uint_least64_t, UINT_LEAST64, d_g[nd_g]);
nd_g++;
#endif
#if H5_SIZEOF_INT_FAST64_T > 0
DETECT_I(int_fast64_t, INT_FAST64, d_g[nd_g]);
nd_g++;
#endif
#if H5_SIZEOF_UINT_FAST64_T > 0
DETECT_I(uint_fast64_t, UINT_FAST64, d_g[nd_g]);
nd_g++;
#endif
#if H5_SIZEOF_LONG_LONG > 0
DETECT_I(long long, LLONG, d_g[nd_g]);
nd_g++;
DETECT_I(unsigned long long, ULLONG, d_g[nd_g]);
nd_g++;
#else
/*
* This architecture doesn't support an integer type larger than `long'
* so we'll just make H5T_NATIVE_LLONG the same as H5T_NATIVE_LONG since
* `long long' is probably equivalent to `long' here anyway.
*/
DETECT_I(long, LLONG, d_g[nd_g]);
nd_g++;
DETECT_I(unsigned long, ULLONG, d_g[nd_g]);
nd_g++;
#endif
}
/*-------------------------------------------------------------------------
* Function: detect_C99_integers
*
* Purpose: Detect C99 integer types
*
* Return: void
*-------------------------------------------------------------------------
*/
static void HDF_NO_UBSAN
detect_C99_integers(void)
{
/* break it down to more subroutines so that each module subroutine */
/* is smaller and takes less time to compile with optimization on. */
detect_C99_integers8();
detect_C99_integers16();
detect_C99_integers32();
detect_C99_integers64();
}
/*-------------------------------------------------------------------------
* Function: detect_C99_floats
*
* Purpose: Detect C99 floating point types
*
* Return: void
*-------------------------------------------------------------------------
*/
static void HDF_NO_UBSAN
detect_C99_floats(void)
{
#if H5_SIZEOF_DOUBLE == H5_SIZEOF_LONG_DOUBLE
/*
* If sizeof(double)==sizeof(long double) then assume that `long double'
* isn't supported and use `double' instead. This suppresses warnings on
* some systems and `long double' is probably the same as `double' here
* anyway.
*/
DETECT_F(double, LDOUBLE, d_g[nd_g]);
nd_g++;
#elif H5_SIZEOF_LONG_DOUBLE != 0
DETECT_F(long double, LDOUBLE, d_g[nd_g]);
nd_g++;
#endif
}
/*-------------------------------------------------------------------------
* Function: detect_alignments
*
* Purpose: Detect structure alignments
*
* Return: void
*-------------------------------------------------------------------------
*/
static void HDF_NO_UBSAN
detect_alignments(void)
{
/* Detect structure alignment for pointers, hvl_t, hobj_ref_t, hdset_reg_ref_t */
DETECT_M(void *, POINTER, m_g[na_g]);
na_g++;
DETECT_M(hvl_t, HVL, m_g[na_g]);
na_g++;
DETECT_M(hobj_ref_t, HOBJREF, m_g[na_g]);
na_g++;
DETECT_M(hdset_reg_ref_t, HDSETREGREF, m_g[na_g]);
na_g++;
}
#if defined(H5SETJMP) && defined(H5_HAVE_SIGNAL)
/* Verify the signal handler for signal signum works correctly multiple times.
* One possible cause of failure is that the signal handling is blocked or
* changed to SIG_DFL after H5LONGJMP.
* Return 0 for success, -1 for failure.
*/
static int
verify_signal_handlers(int signum, void (*handler)(int))
{
#if defined(__has_feature) /* Clang */
#if __has_feature(address_sanitizer) || __has_feature(thread_sanitizer)
/* Under the address and thread sanitizers, don't raise any signals. */
return 0;
#endif
#elif defined(__SANITIZE_ADDRESS__) || defined(__SANITIZE_THREAD__) /* GCC */
return 0;
#endif
void (*save_handler)(int) = HDsignal(signum, handler);
volatile int i, val;
int ntries = 5;
volatile int nfailures = 0;
volatile int nsuccesses = 0;
for (i = 0; i < ntries; i++) {
val = H5SETJMP(jbuf_g);
if (val == 0) {
/* send self the signal to trigger the handler */
signal_handler_tested_g++;
HDraise(signum);
/* Should not reach here. Record error. */
nfailures++;
}
else {
if (val == signum) {
/* return from signum handler. Record a sucess. */
nsuccesses++;
}
else {
fprintf(stderr, "Unknown return value (%d) from H5SETJMP", val);
nfailures++;
}
}
}
/* restore save handler, check results and report failures */
HDsignal(signum, save_handler);
if (nfailures > 0 || nsuccesses != ntries) {
fprintf(stderr,
"verify_signal_handlers for signal %d did %d tries. "
"Found %d failures and %d successes\n",
signum, ntries, nfailures, nsuccesses);
return -1;
}
else {
/* all succeeded */
return 0;
}
}
#endif
/*-------------------------------------------------------------------------
* Function: main
*
* Purpose: Main entry point.
*
* Return: Success: EXIT_SUCCESS
*
*-------------------------------------------------------------------------
*/
int HDF_NO_UBSAN
main(int argc, char *argv[])
{
char *fname = NULL;
FILE *f; /* temporary holding place for the stream pointer
* so that rawoutstream is changed only when succeeded */
if (argc > 1)
fname = argv[1];
/* First check if filename is string "NULL" */
if (fname != NULL) {
/* binary output */
if ((f = HDfopen(fname, "w")) != NULL)
rawoutstream = f;
}
if (!rawoutstream)
rawoutstream = stdout;
#if defined(H5_HAVE_SETSYSINFO) && defined(SSI_NVPAIRS)
#if defined(UAC_NOPRINT) && defined(UAC_SIGBUS)
/*
* Make sure unaligned access generates SIGBUS and doesn't print warning
* messages so that we can detect alignment constraints on the DEC Alpha.
*/
int nvpairs[2];
nvpairs[0] = SSIN_UACPROC;
nvpairs[1] = UAC_NOPRINT | UAC_SIGBUS;
if (setsysinfo(SSI_NVPAIRS, nvpairs, 1, 0, 0) < 0) {
fprintf(stderr, "H5detect: unable to turn off UAC handling: %s\n", HDstrerror(errno));
}
#endif
#endif
#if defined(H5SETJMP) && defined(H5_HAVE_SIGNAL)
/* verify the SIGBUS and SIGSEGV handlers work properly */
if (verify_signal_handlers(SIGBUS, sigbus_handler) != 0) {
fprintf(stderr, "Signal handler %s for signal %d failed\n", "sigbus_handler", SIGBUS);
}
if (verify_signal_handlers(SIGSEGV, sigsegv_handler) != 0) {
fprintf(stderr, "Signal handler %s for signal %d failed\n", "sigsegv_handler", SIGSEGV);
}
if (verify_signal_handlers(SIGILL, sigill_handler) != 0) {
fprintf(stderr, "Signal handler %s for signal %d failed\n", "sigill_handler", SIGILL);
}
#else
align_status_g |= STA_NoHandlerVerify;
#endif
print_header();
/* C89 integer types */
detect_C89_integers();
/* C99 integer types */
detect_C99_integers();
/* C89 floating point types */
detect_C89_floats();
/* C99 floating point types */
detect_C99_floats();
/* Detect structure alignment */
detect_alignments();
print_results(nd_g, d_g, na_g, m_g);
if (rawoutstream && rawoutstream != stdout) {
if (HDfclose(rawoutstream))
fprintf(stderr, "closing rawoutstream");
else
rawoutstream = NULL;
}
return EXIT_SUCCESS;
}
H5_GCC_DIAG_ON("cast-align")
|