56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
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#pragma once
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#include <windows.h>
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#include <stdlib.h>
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#include <tchar.h>
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#include <limits.h>
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#include <mistsafe.h>
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#define ARRAYSIZE(a) (sizeof(a)/sizeof(a[0]))
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const TCHAR EOS = _T('\0');
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const WCHAR WEOS = L'\0';
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const int NanoSec100PerSec = 10000000; // number of 100 nanoseconds per second
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////////////////////////////////////////////////////////////////////////////
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//
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// Function TimeDiff(tm1, tm2)
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// helper function to find the difference (in seconds) of 2 system times
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//
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// Input: 2 SYSTEMTIME structures
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// Output: None
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// Return: seconds of difference
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// > 0 if tm2 is later than tm1
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// = 0 if tm2 and tm1 are the same
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// < 0 if tm2 is earlier than tm1
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//
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// On error the function returns 0 even if the two times are not equal
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//
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// Comment: If the number of seconds goes beyond INT_MAX (that is
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// more than 24,855 days, INT_MAX is returned.
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// If the number of seconds goes beyond INT_MIN (a negative value,
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// means 24,855 days ago), INT_MIN is returned.
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//
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////////////////////////////////////////////////////////////////////////////
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int TimeDiff(SYSTEMTIME tm1, SYSTEMTIME tm2);
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////////////////////////////////////////////////////////////////////////////
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//
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// Function TimeAddSeconds(SYSTEMTIME, int, SYSTEMTIME* )
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// helper function to calculate time by adding n seconds to
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// the given time.
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//
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// Input: a SYSTEMTIME as base time, an int as seconds to add to the base time
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// Output: new time
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// Return: HRESULT
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//
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////////////////////////////////////////////////////////////////////////////
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HRESULT TimeAddSeconds(SYSTEMTIME tmBase, int iSeconds, SYSTEMTIME* pTimeNew);
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//Function to convert a string buffer to system time
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HRESULT String2SystemTime(LPCTSTR pszDateTime, SYSTEMTIME *ptm);
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//Function to convert a system time structure to a string buffer
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HRESULT SystemTime2String(SYSTEMTIME & tm, LPTSTR pszDateTime, size_t cSize);
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