/* $Id: tstRand.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */ /** @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 #include #include #include #include #include /********************************************************************************************************************************* * 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; }