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47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
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#include <precomp.h>
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#include <ntsecapi.h>
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#include <internal/tls.h>
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/*
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* @implemented
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*/
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int
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rand(void)
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{
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PTHREADDATA ThreadData = GetThreadData();
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ThreadData->tnext = ThreadData->tnext * 0x5deece66dLL + 2531011;
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return (int)((ThreadData->tnext >> 16) & RAND_MAX);
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}
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/*
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* @implemented
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*/
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void
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srand(unsigned int seed)
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{
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PTHREADDATA ThreadData = GetThreadData();
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ThreadData->tnext = (ULONGLONG)seed;
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}
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/*********************************************************************
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* rand_s (MSVCRT.@)
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*/
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int CDECL rand_s(unsigned int *pval)
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{
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BOOLEAN (WINAPI *pSystemFunction036)(PVOID, ULONG); // RtlGenRandom
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HINSTANCE hadvapi32 = LoadLibraryA("advapi32.dll");
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pSystemFunction036 = (void*)GetProcAddress(hadvapi32, "SystemFunction036");
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#if 1
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if (!pval || (pSystemFunction036 && !pSystemFunction036(pval, sizeof(*pval))))
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{
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_invalid_parameter(NULL,_CRT_WIDE("rand_s"),_CRT_WIDE(__FILE__),__LINE__, 0);
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*_errno() = EINVAL;
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return EINVAL;
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}
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#endif
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if(hadvapi32) FreeLibrary(hadvapi32);
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return 0;
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}
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