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mingkuang
29 lines
625 B
C++
29 lines
625 B
C++
//
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// rand_s.cpp
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// The implementation of the rand_s() function, which generates random numbers.
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//
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#include <corecrt_internal.h>
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#include <stdlib.h>
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#if WindowsTargetPlatformMinVersion < WindowsTargetPlatformWindows6
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extern "C" errno_t __cdecl rand_s(unsigned int* const result)
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{
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_VALIDATE_RETURN_ERRCODE(result != nullptr, EINVAL);
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*result = 0;
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if (!__acrt_RtlGenRandom(result, static_cast<ULONG>(sizeof(*result))))
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{
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errno = ENOMEM;
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return errno;
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}
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return 0;
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}
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_LCRT_DEFINE_IAT_SYMBOL(rand_s);
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#endif
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