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
|
/* $Id: tstRand.cpp $ */
/** @file
* IPRT - Testcase for the RTRand API.
*/
/*
* Copyright (C) 2008-2020 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/rand.h>
#include <iprt/errcore.h>
#include <iprt/stream.h>
#include <iprt/initterm.h>
#include <iprt/string.h>
#include <iprt/assert.h>
/*********************************************************************************************************************************
* Structures and Typedefs *
*********************************************************************************************************************************/
typedef struct TSTMEMAUTOPTRSTRUCT
{
uint32_t a;
uint32_t b;
uint32_t c;
} TSTMEMAUTOPTRSTRUCT;
/*********************************************************************************************************************************
* Defined Constants And Macros *
*********************************************************************************************************************************/
#define CHECK_EXPR(expr) \
do { bool const f = !!(expr); if (RT_UNLIKELY(!f)) { RTPrintf("tstRand(%d): %s!\n", __LINE__, #expr); g_cErrors++; } } while (0)
#define CHECK_EXPR_MSG(expr, msg) \
do { \
bool const f = !!(expr); \
if (RT_UNLIKELY(!f)) { \
RTPrintf("tstRand(%d): %s!\n", __LINE__, #expr); \
RTPrintf("tstRand: "); \
RTPrintf msg; \
if (++g_cErrors > 25) return 1; \
} \
} while (0)
#define TST_RAND_SAMPLE_RANGES 16
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
static unsigned g_cErrors = 0;
static void tstRandCheckDist(uint32_t *pacHits, unsigned iTest)
{
RTPrintf("tstRand:");
uint32_t iMin = UINT32_MAX;
uint32_t iMax = 0;
uint32_t iAvg = 0;
for (unsigned iRange = 0; iRange < TST_RAND_SAMPLE_RANGES; iRange++)
{
RTPrintf(" %04RX32", pacHits[iRange]);
if (iMax < pacHits[iRange])
iMax = pacHits[iRange];
if (iMin > pacHits[iRange])
iMin = pacHits[iRange];
iAvg += pacHits[iRange];
}
iAvg /= TST_RAND_SAMPLE_RANGES;
RTPrintf(" min=%RX32 (%%%d) max=%RX32 (%%%d) calc avg=%RX32 [test=%d]\n",
iMin, (iAvg - iMin) * 100 / iAvg, iMax,
(iMax - iAvg) * 100 / iAvg,
iAvg,
iTest);
CHECK_EXPR(iMin >= iAvg - iAvg / 4);
CHECK_EXPR(iMax <= iAvg + iAvg / 4);
}
static int tstRandAdv(RTRAND hRand)
{
/*
* Test distribution.
*/
#if 1
/* unsigned 32-bit */
static const struct
{
uint32_t u32First;
uint32_t u32Last;
} s_aU32Tests[] =
{
{ 0, UINT32_MAX },
{ 0, UINT32_MAX / 2 + UINT32_MAX / 4 },
{ 0, UINT32_MAX / 2 + UINT32_MAX / 8 },
{ 0, UINT32_MAX / 2 + UINT32_MAX / 16 },
{ 0, UINT32_MAX / 2 + UINT32_MAX / 64 },
{ 0, UINT32_MAX / 2 },
{ UINT32_MAX / 4, UINT32_MAX / 4 * 3 },
{ 0, TST_RAND_SAMPLE_RANGES - 1 },
{ 1234, 1234 + TST_RAND_SAMPLE_RANGES - 1 },
};
for (unsigned iTest = 0; iTest < RT_ELEMENTS(s_aU32Tests); iTest++)
{
uint32_t acHits[TST_RAND_SAMPLE_RANGES] = {0};
uint32_t const uFirst = s_aU32Tests[iTest].u32First;
uint32_t const uLast = s_aU32Tests[iTest].u32Last;
uint32_t const uRange = uLast - uFirst; Assert(uLast >= uFirst);
uint32_t const uDivisor = uRange / TST_RAND_SAMPLE_RANGES + 1;
RTPrintf("tstRand: TESTING RTRandAdvU32Ex(,%#RX32, %#RX32) distribution... [div=%#RX32 range=%#RX32]\n", uFirst, uLast, uDivisor, uRange);
for (unsigned iSample = 0; iSample < TST_RAND_SAMPLE_RANGES * 10240; iSample++)
{
uint32_t uRand = RTRandAdvU32Ex(hRand, uFirst, uLast);
CHECK_EXPR_MSG(uRand >= uFirst, ("%#RX32 %#RX32\n", uRand, uFirst));
CHECK_EXPR_MSG(uRand <= uLast, ("%#RX32 %#RX32\n", uRand, uLast));
uint32_t off = uRand - uFirst;
acHits[off / uDivisor]++;
}
tstRandCheckDist(acHits, iTest);
}
#endif
#if 1
/* unsigned 64-bit */
static const struct
{
uint64_t u64First;
uint64_t u64Last;
} s_aU64Tests[] =
{
{ 0, UINT64_MAX },
{ 0, UINT64_MAX / 2 + UINT64_MAX / 4 },
{ 0, UINT64_MAX / 2 + UINT64_MAX / 8 },
{ 0, UINT64_MAX / 2 + UINT64_MAX / 16 },
{ 0, UINT64_MAX / 2 + UINT64_MAX / 64 },
{ 0, UINT64_MAX / 2 },
{ UINT64_MAX / 4, UINT64_MAX / 4 * 3 },
{ 0, UINT32_MAX },
{ 0, UINT32_MAX / 2 + UINT32_MAX / 4 },
{ 0, UINT32_MAX / 2 + UINT32_MAX / 8 },
{ 0, UINT32_MAX / 2 + UINT32_MAX / 16 },
{ 0, UINT32_MAX / 2 + UINT32_MAX / 64 },
{ 0, UINT32_MAX / 2 },
{ UINT32_MAX / 4, UINT32_MAX / 4 * 3 },
{ 0, TST_RAND_SAMPLE_RANGES - 1 },
{ 1234, 1234 + TST_RAND_SAMPLE_RANGES - 1 },
};
for (unsigned iTest = 0; iTest < RT_ELEMENTS(s_aU64Tests); iTest++)
{
uint32_t acHits[TST_RAND_SAMPLE_RANGES] = {0};
uint64_t const uFirst = s_aU64Tests[iTest].u64First;
uint64_t const uLast = s_aU64Tests[iTest].u64Last;
uint64_t const uRange = uLast - uFirst; Assert(uLast >= uFirst);
uint64_t const uDivisor = uRange / TST_RAND_SAMPLE_RANGES + 1;
RTPrintf("tstRand: TESTING RTRandAdvU64Ex(,%#RX64, %#RX64) distribution... [div=%#RX64 range=%#RX64]\n", uFirst, uLast, uDivisor, uRange);
for (unsigned iSample = 0; iSample < TST_RAND_SAMPLE_RANGES * 10240; iSample++)
{
uint64_t uRand = RTRandAdvU64Ex(hRand, uFirst, uLast);
CHECK_EXPR_MSG(uRand >= uFirst, ("%#RX64 %#RX64\n", uRand, uFirst));
CHECK_EXPR_MSG(uRand <= uLast, ("%#RX64 %#RX64\n", uRand, uLast));
uint64_t off = uRand - uFirst;
acHits[off / uDivisor]++;
}
tstRandCheckDist(acHits, iTest);
}
#endif
#if 1
/* signed 32-bit */
static const struct
{
int32_t i32First;
int32_t i32Last;
} s_aS32Tests[] =
{
{ -429496729, 429496729 },
{ INT32_MIN, INT32_MAX },
{ INT32_MIN, INT32_MAX / 2 },
{ -0x20000000, INT32_MAX },
{ -0x10000000, INT32_MAX },
{ -0x08000000, INT32_MAX },
{ -0x00800000, INT32_MAX },
{ -0x00080000, INT32_MAX },
{ -0x00008000, INT32_MAX },
{ -0x00000800, INT32_MAX },
{ 2, INT32_MAX / 2 },
{ 4000000, INT32_MAX / 2 },
{ -4000000, INT32_MAX / 2 },
{ INT32_MIN / 2, INT32_MAX / 2 },
{ INT32_MIN / 3, INT32_MAX / 2 },
{ INT32_MIN / 3, INT32_MAX / 3 },
{ INT32_MIN / 3, INT32_MAX / 4 },
{ INT32_MIN / 4, INT32_MAX / 4 },
{ INT32_MIN / 5, INT32_MAX / 5 },
{ INT32_MIN / 6, INT32_MAX / 6 },
{ INT32_MIN / 7, INT32_MAX / 6 },
{ INT32_MIN / 7, INT32_MAX / 7 },
{ INT32_MIN / 7, INT32_MAX / 8 },
{ INT32_MIN / 8, INT32_MAX / 8 },
{ INT32_MIN / 9, INT32_MAX / 9 },
{ INT32_MIN / 9, INT32_MAX / 12 },
{ INT32_MIN / 12, INT32_MAX / 12 },
{ 0, TST_RAND_SAMPLE_RANGES - 1 },
{ -TST_RAND_SAMPLE_RANGES / 2, TST_RAND_SAMPLE_RANGES / 2 - 1 },
};
for (unsigned iTest = 0; iTest < RT_ELEMENTS(s_aS32Tests); iTest++)
{
uint32_t acHits[TST_RAND_SAMPLE_RANGES] = {0};
int32_t const iFirst = s_aS32Tests[iTest].i32First;
int32_t const iLast = s_aS32Tests[iTest].i32Last;
uint32_t const uRange = iLast - iFirst; AssertMsg(iLast >= iFirst, ("%d\n", iTest));
uint32_t const uDivisor = (uRange ? uRange : UINT32_MAX) / TST_RAND_SAMPLE_RANGES + 1;
RTPrintf("tstRand: TESTING RTRandAdvS32Ex(,%#RI32, %#RI32) distribution... [div=%#RX32 range=%#RX32]\n", iFirst, iLast, uDivisor, uRange);
for (unsigned iSample = 0; iSample < TST_RAND_SAMPLE_RANGES * 10240; iSample++)
{
int32_t iRand = RTRandAdvS32Ex(hRand, iFirst, iLast);
CHECK_EXPR_MSG(iRand >= iFirst, ("%#RI32 %#RI32\n", iRand, iFirst));
CHECK_EXPR_MSG(iRand <= iLast, ("%#RI32 %#RI32\n", iRand, iLast));
uint32_t off = iRand - iFirst;
acHits[off / uDivisor]++;
}
tstRandCheckDist(acHits, iTest);
}
#endif
#if 1
/* signed 64-bit */
static const struct
{
int64_t i64First;
int64_t i64Last;
} s_aS64Tests[] =
{
{ INT64_MIN, INT64_MAX },
{ INT64_MIN, INT64_MAX / 2 },
{ INT64_MIN / 2, INT64_MAX / 2 },
{ INT64_MIN / 2 + INT64_MIN / 4, INT64_MAX / 2 },
{ INT64_MIN / 2 + INT64_MIN / 8, INT64_MAX / 2 },
{ INT64_MIN / 2 + INT64_MIN / 16, INT64_MAX / 2 },
{ INT64_MIN / 2 + INT64_MIN / 64, INT64_MAX / 2 },
{ INT64_MIN / 2 + INT64_MIN / 64, INT64_MAX / 2 + INT64_MAX / 64 },
{ INT64_MIN / 2, INT64_MAX / 2 + INT64_MAX / 64 },
{ INT64_MIN / 2, INT64_MAX / 2 + INT64_MAX / 8 },
{ INT64_MIN / 2, INT64_MAX / 2 - INT64_MAX / 8 },
{ INT64_MIN / 2 - INT64_MIN / 4, INT64_MAX / 2 - INT64_MAX / 4 },
{ INT64_MIN / 2 - INT64_MIN / 4, INT64_MAX / 2 - INT64_MAX / 8 },
{ INT64_MIN / 2 - INT64_MIN / 8, INT64_MAX / 2 - INT64_MAX / 8 },
{ INT64_MIN / 2 - INT64_MIN / 16, INT64_MAX / 2 - INT64_MAX / 8 },
{ INT64_MIN / 2 - INT64_MIN / 16, INT64_MAX / 2 - INT64_MAX / 16 },
{ INT64_MIN / 2 - INT64_MIN / 32, INT64_MAX / 2 - INT64_MAX / 16 },
{ INT64_MIN / 2 - INT64_MIN / 32, INT64_MAX / 2 - INT64_MAX / 32 },
{ INT64_MIN / 2 - INT64_MIN / 64, INT64_MAX / 2 - INT64_MAX / 64 },
{ INT64_MIN / 2 - INT64_MIN / 8, INT64_MAX / 2 },
{ INT64_MIN / 4, INT64_MAX / 4 },
{ INT64_MIN / 5, INT64_MAX / 5 },
{ INT64_MIN / 6, INT64_MAX / 6 },
{ INT64_MIN / 7, INT64_MAX / 7 },
{ INT64_MIN / 8, INT64_MAX / 8 },
{ INT32_MIN, INT32_MAX },
{ INT32_MIN, INT32_MAX / 2 },
{ -0x20000000, INT32_MAX },
{ -0x10000000, INT32_MAX },
{ -0x7f000000, INT32_MAX },
{ -0x08000000, INT32_MAX },
{ -0x00800000, INT32_MAX },
{ -0x00080000, INT32_MAX },
{ -0x00008000, INT32_MAX },
{ 2, INT32_MAX / 2 },
{ 4000000, INT32_MAX / 2 },
{ -4000000, INT32_MAX / 2 },
{ INT32_MIN / 2, INT32_MAX / 2 },
{ 0, TST_RAND_SAMPLE_RANGES - 1 },
{ -TST_RAND_SAMPLE_RANGES / 2, TST_RAND_SAMPLE_RANGES / 2 - 1 }
};
for (unsigned iTest = 0; iTest < RT_ELEMENTS(s_aS64Tests); iTest++)
{
uint32_t acHits[TST_RAND_SAMPLE_RANGES] = {0};
int64_t const iFirst = s_aS64Tests[iTest].i64First;
int64_t const iLast = s_aS64Tests[iTest].i64Last;
uint64_t const uRange = iLast - iFirst; AssertMsg(iLast >= iFirst, ("%d\n", iTest));
uint64_t const uDivisor = (uRange ? uRange : UINT64_MAX) / TST_RAND_SAMPLE_RANGES + 1;
RTPrintf("tstRand: TESTING RTRandAdvS64Ex(,%#RI64, %#RI64) distribution... [div=%#RX64 range=%#016RX64]\n", iFirst, iLast, uDivisor, uRange);
for (unsigned iSample = 0; iSample < TST_RAND_SAMPLE_RANGES * 10240; iSample++)
{
int64_t iRand = RTRandAdvS64Ex(hRand, iFirst, iLast);
CHECK_EXPR_MSG(iRand >= iFirst, ("%#RI64 %#RI64\n", iRand, iFirst));
CHECK_EXPR_MSG(iRand <= iLast, ("%#RI64 %#RI64\n", iRand, iLast));
uint64_t off = iRand - iFirst;
acHits[off / uDivisor]++;
}
tstRandCheckDist(acHits, iTest);
}
#endif
/*
* Test saving and restoring the state.
*/
RTPrintf("tstRand: TESTING RTRandAdvSave/RestoreSave\n");
char szState[256];
size_t cbState = sizeof(szState);
int rc = RTRandAdvSaveState(hRand, szState, &cbState);
if (rc != VERR_NOT_SUPPORTED)
{
CHECK_EXPR_MSG(rc == VINF_SUCCESS, ("RTRandAdvSaveState(%p,,256) -> %Rrc (%d)\n", (uintptr_t)hRand, rc, rc));
uint32_t const u32A1 = RTRandAdvU32(hRand);
uint32_t const u32B1 = RTRandAdvU32(hRand);
RTPrintf("tstRand: state:\"%s\" A=%RX32 B=%RX32\n", szState, u32A1, u32B1);
rc = RTRandAdvRestoreState(hRand, szState);
CHECK_EXPR_MSG(rc == VINF_SUCCESS, ("RTRandAdvRestoreState(%p,\"%s\") -> %Rrc (%d)\n", (uintptr_t)hRand, szState, rc, rc));
uint32_t const u32A2 = RTRandAdvU32(hRand);
uint32_t const u32B2 = RTRandAdvU32(hRand);
CHECK_EXPR_MSG(u32A1 == u32A2, ("u32A1=%RX32 u32A2=%RX32\n", u32A1, u32A2));
CHECK_EXPR_MSG(u32B1 == u32B2, ("u32B1=%RX32 u32B2=%RX32\n", u32B1, u32B2));
}
else
{
szState[0] = '\0';
rc = RTRandAdvRestoreState(hRand, szState);
CHECK_EXPR_MSG(rc == VERR_NOT_SUPPORTED, ("RTRandAdvRestoreState(%p,\"\") -> %Rrc (%d)\n", (uintptr_t)hRand, rc, rc));
}
/*
* Destroy it.
*/
rc = RTRandAdvDestroy(hRand);
CHECK_EXPR_MSG(rc == VINF_SUCCESS, ("RTRandAdvDestroy(%p) -> %Rrc (%d)\n", (uintptr_t)hRand, rc, rc));
return 0;
}
int main()
{
RTR3InitExeNoArguments(0);
RTPrintf("tstRand: TESTING...\n");
/*
* Do some smoke tests first?
*/
/** @todo RTRand smoke testing. */
#if 1
/*
* Test distribution.
*/
#if 1
/* unsigned 32-bit */
static const struct
{
uint32_t u32First;
uint32_t u32Last;
} s_aU32Tests[] =
{
{ 0, UINT32_MAX },
{ 0, UINT32_MAX / 2 + UINT32_MAX / 4 },
{ 0, UINT32_MAX / 2 + UINT32_MAX / 8 },
{ 0, UINT32_MAX / 2 + UINT32_MAX / 16 },
{ 0, UINT32_MAX / 2 + UINT32_MAX / 64 },
{ 0, UINT32_MAX / 2 },
{ UINT32_MAX / 4, UINT32_MAX / 4 * 3 },
{ 0, TST_RAND_SAMPLE_RANGES - 1 },
{ 1234, 1234 + TST_RAND_SAMPLE_RANGES - 1 },
};
for (unsigned iTest = 0; iTest < RT_ELEMENTS(s_aU32Tests); iTest++)
{
uint32_t acHits[TST_RAND_SAMPLE_RANGES] = {0};
uint32_t const uFirst = s_aU32Tests[iTest].u32First;
uint32_t const uLast = s_aU32Tests[iTest].u32Last;
uint32_t const uRange = uLast - uFirst; Assert(uLast >= uFirst);
uint32_t const uDivisor = uRange / TST_RAND_SAMPLE_RANGES + 1;
RTPrintf("tstRand: TESTING RTRandU32Ex(%#RX32, %#RX32) distribution... [div=%#RX32 range=%#RX32]\n", uFirst, uLast, uDivisor, uRange);
for (unsigned iSample = 0; iSample < TST_RAND_SAMPLE_RANGES * 10240; iSample++)
{
uint32_t uRand = RTRandU32Ex(uFirst, uLast);
CHECK_EXPR_MSG(uRand >= uFirst, ("%#RX32 %#RX32\n", uRand, uFirst));
CHECK_EXPR_MSG(uRand <= uLast, ("%#RX32 %#RX32\n", uRand, uLast));
uint32_t off = uRand - uFirst;
acHits[off / uDivisor]++;
}
tstRandCheckDist(acHits, iTest);
}
#endif
#if 1
/* unsigned 64-bit */
static const struct
{
uint64_t u64First;
uint64_t u64Last;
} s_aU64Tests[] =
{
{ 0, UINT64_MAX },
{ 0, UINT64_MAX / 2 + UINT64_MAX / 4 },
{ 0, UINT64_MAX / 2 + UINT64_MAX / 8 },
{ 0, UINT64_MAX / 2 + UINT64_MAX / 16 },
{ 0, UINT64_MAX / 2 + UINT64_MAX / 64 },
{ 0, UINT64_MAX / 2 },
{ UINT64_MAX / 4, UINT64_MAX / 4 * 3 },
{ 0, UINT32_MAX },
{ 0, UINT32_MAX / 2 + UINT32_MAX / 4 },
{ 0, UINT32_MAX / 2 + UINT32_MAX / 8 },
{ 0, UINT32_MAX / 2 + UINT32_MAX / 16 },
{ 0, UINT32_MAX / 2 + UINT32_MAX / 64 },
{ 0, UINT32_MAX / 2 },
{ UINT32_MAX / 4, UINT32_MAX / 4 * 3 },
{ 0, TST_RAND_SAMPLE_RANGES - 1 },
{ 1234, 1234 + TST_RAND_SAMPLE_RANGES - 1 },
};
for (unsigned iTest = 0; iTest < RT_ELEMENTS(s_aU64Tests); iTest++)
{
uint32_t acHits[TST_RAND_SAMPLE_RANGES] = {0};
uint64_t const uFirst = s_aU64Tests[iTest].u64First;
uint64_t const uLast = s_aU64Tests[iTest].u64Last;
uint64_t const uRange = uLast - uFirst; Assert(uLast >= uFirst);
uint64_t const uDivisor = uRange / TST_RAND_SAMPLE_RANGES + 1;
RTPrintf("tstRand: TESTING RTRandU64Ex(%#RX64, %#RX64) distribution... [div=%#RX64 range=%#RX64]\n", uFirst, uLast, uDivisor, uRange);
for (unsigned iSample = 0; iSample < TST_RAND_SAMPLE_RANGES * 10240; iSample++)
{
uint64_t uRand = RTRandU64Ex(uFirst, uLast);
CHECK_EXPR_MSG(uRand >= uFirst, ("%#RX64 %#RX64\n", uRand, uFirst));
CHECK_EXPR_MSG(uRand <= uLast, ("%#RX64 %#RX64\n", uRand, uLast));
uint64_t off = uRand - uFirst;
acHits[off / uDivisor]++;
}
tstRandCheckDist(acHits, iTest);
}
#endif
#if 1
/* signed 32-bit */
static const struct
{
int32_t i32First;
int32_t i32Last;
} s_aS32Tests[] =
{
{ -429496729, 429496729 },
{ INT32_MIN, INT32_MAX },
{ INT32_MIN, INT32_MAX / 2 },
{ -0x20000000, INT32_MAX },
{ -0x10000000, INT32_MAX },
{ -0x08000000, INT32_MAX },
{ -0x00800000, INT32_MAX },
{ -0x00080000, INT32_MAX },
{ -0x00008000, INT32_MAX },
{ -0x00000800, INT32_MAX },
{ 2, INT32_MAX / 2 },
{ 4000000, INT32_MAX / 2 },
{ -4000000, INT32_MAX / 2 },
{ INT32_MIN / 2, INT32_MAX / 2 },
{ INT32_MIN / 3, INT32_MAX / 2 },
{ INT32_MIN / 3, INT32_MAX / 3 },
{ INT32_MIN / 3, INT32_MAX / 4 },
{ INT32_MIN / 4, INT32_MAX / 4 },
{ INT32_MIN / 5, INT32_MAX / 5 },
{ INT32_MIN / 6, INT32_MAX / 6 },
{ INT32_MIN / 7, INT32_MAX / 6 },
{ INT32_MIN / 7, INT32_MAX / 7 },
{ INT32_MIN / 7, INT32_MAX / 8 },
{ INT32_MIN / 8, INT32_MAX / 8 },
{ INT32_MIN / 9, INT32_MAX / 9 },
{ INT32_MIN / 9, INT32_MAX / 12 },
{ INT32_MIN / 12, INT32_MAX / 12 },
{ 0, TST_RAND_SAMPLE_RANGES - 1 },
{ -TST_RAND_SAMPLE_RANGES / 2, TST_RAND_SAMPLE_RANGES / 2 - 1 },
};
for (unsigned iTest = 0; iTest < RT_ELEMENTS(s_aS32Tests); iTest++)
{
uint32_t acHits[TST_RAND_SAMPLE_RANGES] = {0};
int32_t const iFirst = s_aS32Tests[iTest].i32First;
int32_t const iLast = s_aS32Tests[iTest].i32Last;
uint32_t const uRange = iLast - iFirst; AssertMsg(iLast >= iFirst, ("%d\n", iTest));
uint32_t const uDivisor = (uRange ? uRange : UINT32_MAX) / TST_RAND_SAMPLE_RANGES + 1;
RTPrintf("tstRand: TESTING RTRandS32Ex(%#RI32, %#RI32) distribution... [div=%#RX32 range=%#RX32]\n", iFirst, iLast, uDivisor, uRange);
for (unsigned iSample = 0; iSample < TST_RAND_SAMPLE_RANGES * 10240; iSample++)
{
int32_t iRand = RTRandS32Ex(iFirst, iLast);
CHECK_EXPR_MSG(iRand >= iFirst, ("%#RI32 %#RI32\n", iRand, iFirst));
CHECK_EXPR_MSG(iRand <= iLast, ("%#RI32 %#RI32\n", iRand, iLast));
uint32_t off = iRand - iFirst;
acHits[off / uDivisor]++;
}
tstRandCheckDist(acHits, iTest);
}
#endif
#if 1
/* signed 64-bit */
static const struct
{
int64_t i64First;
int64_t i64Last;
} s_aS64Tests[] =
{
{ INT64_MIN, INT64_MAX },
{ INT64_MIN, INT64_MAX / 2 },
{ INT64_MIN / 2, INT64_MAX / 2 },
{ INT64_MIN / 2 + INT64_MIN / 4, INT64_MAX / 2 },
{ INT64_MIN / 2 + INT64_MIN / 8, INT64_MAX / 2 },
{ INT64_MIN / 2 + INT64_MIN / 16, INT64_MAX / 2 },
{ INT64_MIN / 2 + INT64_MIN / 64, INT64_MAX / 2 },
{ INT64_MIN / 2 + INT64_MIN / 64, INT64_MAX / 2 + INT64_MAX / 64 },
{ INT64_MIN / 2, INT64_MAX / 2 + INT64_MAX / 64 },
{ INT64_MIN / 2, INT64_MAX / 2 + INT64_MAX / 8 },
{ INT64_MIN / 2, INT64_MAX / 2 - INT64_MAX / 8 },
{ INT64_MIN / 2 - INT64_MIN / 4, INT64_MAX / 2 - INT64_MAX / 4 },
{ INT64_MIN / 2 - INT64_MIN / 4, INT64_MAX / 2 - INT64_MAX / 8 },
{ INT64_MIN / 2 - INT64_MIN / 8, INT64_MAX / 2 - INT64_MAX / 8 },
{ INT64_MIN / 2 - INT64_MIN / 16, INT64_MAX / 2 - INT64_MAX / 8 },
{ INT64_MIN / 2 - INT64_MIN / 16, INT64_MAX / 2 - INT64_MAX / 16 },
{ INT64_MIN / 2 - INT64_MIN / 32, INT64_MAX / 2 - INT64_MAX / 16 },
{ INT64_MIN / 2 - INT64_MIN / 32, INT64_MAX / 2 - INT64_MAX / 32 },
{ INT64_MIN / 2 - INT64_MIN / 64, INT64_MAX / 2 - INT64_MAX / 64 },
{ INT64_MIN / 2 - INT64_MIN / 8, INT64_MAX / 2 },
{ INT64_MIN / 4, INT64_MAX / 4 },
{ INT64_MIN / 5, INT64_MAX / 5 },
{ INT64_MIN / 6, INT64_MAX / 6 },
{ INT64_MIN / 7, INT64_MAX / 7 },
{ INT64_MIN / 8, INT64_MAX / 8 },
{ INT32_MIN, INT32_MAX },
{ INT32_MIN, INT32_MAX / 2 },
{ -0x20000000, INT32_MAX },
{ -0x10000000, INT32_MAX },
{ -0x7f000000, INT32_MAX },
{ -0x08000000, INT32_MAX },
{ -0x00800000, INT32_MAX },
{ -0x00080000, INT32_MAX },
{ -0x00008000, INT32_MAX },
{ 2, INT32_MAX / 2 },
{ 4000000, INT32_MAX / 2 },
{ -4000000, INT32_MAX / 2 },
{ INT32_MIN / 2, INT32_MAX / 2 },
{ 0, TST_RAND_SAMPLE_RANGES - 1 },
{ -TST_RAND_SAMPLE_RANGES / 2, TST_RAND_SAMPLE_RANGES / 2 - 1 }
};
for (unsigned iTest = 0; iTest < RT_ELEMENTS(s_aS64Tests); iTest++)
{
uint32_t acHits[TST_RAND_SAMPLE_RANGES] = {0};
int64_t const iFirst = s_aS64Tests[iTest].i64First;
int64_t const iLast = s_aS64Tests[iTest].i64Last;
uint64_t const uRange = iLast - iFirst; AssertMsg(iLast >= iFirst, ("%d\n", iTest));
uint64_t const uDivisor = (uRange ? uRange : UINT64_MAX) / TST_RAND_SAMPLE_RANGES + 1;
RTPrintf("tstRand: TESTING RTRandS64Ex(%#RI64, %#RI64) distribution... [div=%#RX64 range=%#016RX64]\n", iFirst, iLast, uDivisor, uRange);
for (unsigned iSample = 0; iSample < TST_RAND_SAMPLE_RANGES * 10240; iSample++)
{
int64_t iRand = RTRandS64Ex(iFirst, iLast);
CHECK_EXPR_MSG(iRand >= iFirst, ("%#RI64 %#RI64\n", iRand, iFirst));
CHECK_EXPR_MSG(iRand <= iLast, ("%#RI64 %#RI64\n", iRand, iLast));
uint64_t off = iRand - iFirst;
acHits[off / uDivisor]++;
}
tstRandCheckDist(acHits, iTest);
}
#endif
#endif /* Testing RTRand */
#if 1
/*
* Test the various random generators.
*/
RTPrintf("tstRand: TESTING RTRandAdvCreateParkerMiller\n");
RTRAND hRand;
int rc = RTRandAdvCreateParkMiller(&hRand);
CHECK_EXPR_MSG(rc == VINF_SUCCESS, ("rc=%Rrc\n", rc));
if (RT_SUCCESS(rc))
if (tstRandAdv(hRand))
return 1;
#endif /* Testing RTRandAdv */
/*
* Summary.
*/
if (!g_cErrors)
RTPrintf("tstRand: SUCCESS\n");
else
RTPrintf("tstRand: FAILED - %d errors\n", g_cErrors);
return !!g_cErrors;
}
|
