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04e0dc4a7a
Imported from https://www.nuget.org/packages/Microsoft.Windows.SDK.CRTSource/10.0.22621.3 License: MIT
63 lines
2.2 KiB
C++
63 lines
2.2 KiB
C++
//
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// systime.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 _getsystime() and _setsystime() functions.
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//
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#include <corecrt_internal_time.h>
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// Gets the current system time and stores it in 'result'. Returns the number
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// of milliseconds (the 'result' cannot store milliseconds).
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extern "C" unsigned __cdecl _getsystime(struct tm* const result)
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{
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_VALIDATE_RETURN(result != nullptr, EINVAL, 0)
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SYSTEMTIME local_time;
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GetLocalTime(&local_time);
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result->tm_isdst = -1; // mktime() computes whether this is
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// during Standard or Daylight time.
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result->tm_sec = static_cast<int>(local_time.wSecond);
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result->tm_min = static_cast<int>(local_time.wMinute);
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result->tm_hour = static_cast<int>(local_time.wHour);
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result->tm_mday = static_cast<int>(local_time.wDay);
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result->tm_mon = static_cast<int>(local_time.wMonth - 1);
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result->tm_year = static_cast<int>(local_time.wYear - 1900);
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result->tm_wday = static_cast<int>(local_time.wDayOfWeek);
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// Normalize uninitialized fields:
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_mktime32(result);
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return (local_time.wMilliseconds);
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}
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// Sets the system time to the time specified by 'source' and 'milliseconds.
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// Returns zero on success; returns a system error code on failure.
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extern "C" unsigned __cdecl _setsystime(struct tm* const source, unsigned const milliseconds)
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{
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_ASSERTE(source != nullptr);
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if (source == nullptr)
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return ERROR_INVALID_PARAMETER;
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// Normalize uninitialized fields:
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_mktime32(source);
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SYSTEMTIME local_time;
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local_time.wYear = static_cast<WORD>(source->tm_year + 1900);
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local_time.wMonth = static_cast<WORD>(source->tm_mon + 1);
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local_time.wDay = static_cast<WORD>(source->tm_mday);
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local_time.wHour = static_cast<WORD>(source->tm_hour);
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local_time.wMinute = static_cast<WORD>(source->tm_min);
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local_time.wSecond = static_cast<WORD>(source->tm_sec);
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local_time.wMilliseconds = static_cast<WORD>(milliseconds);
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if (!SetLocalTime(&local_time))
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return static_cast<int>(GetLastError());
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return 0;
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}
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