How To Convert a UNIX time_t to a Win32 FILETIME or SYSTEMTIME

Q

How to convert a Unix timestamp to a Win32 FILETIME or SYSTEMTIME?

✍: FYIcenter

A

The following function converts a filetime in the UNIX time_t format to a Win32 FILETIME format. Note that time_t is a 32-bit value and FILETIME is a 64-bit structure, so the Win32 function, Int32x32To64() is used in the following function:

   #include 
   #include 
   #include 

   void UnixTimeToFileTime(time_t t, LPFILETIME pft)
   {
     // Note that LONGLONG is a 64-bit value
     LONGLONG ll;

     ll = Int32x32To64(t, 10000000) + 116444736000000000;
     pft->dwLowDateTime = (DWORD)ll;
     pft->dwHighDateTime = ll >> 32;
   }

Once the UNIX time is converted to a FILETIME structure, other Win32 time formats can be easily obtained by using Win32 functions such as FileTimeToSystemTime() and FileTimeToDosDateTime().

   void UnixTimeToSystemTime(time_t t, LPSYSTEMTIME pst)
   {
     FILETIME ft;

     UnixTimeToFileTime(t, &ft);
     FileTimeToSystemTime(&ft, pst);
   }

2012-01-02, 9752👍, 0💬

What is difference between ADPATCH and OPATCH ?
What is difference between ADPATCH and OPATCH ? # ADPATCH is utility to apply ORACLE application Patches whereas # OPATCH is utility to apply database patches 2011-12-29, 6655👍, 0💬

Can you use both ADPATCH and OPATCH in application ?
Can you use both ADPATCH and OPATCH in application ? Yes you have to use both in application , for application patches you will use ADPATCH UTILITY and for applying database patch in application you will use opatch UTILITY. 2011-12-29, 3497👍, 0💬

What Is Unix Timestamp
What is Unix timestamp? Unix timestamp, or Epoch timestamp, is defined as the number of seconds elapsed since midnight Coordinated Universal Time (UTC) of Thursday, January 1, 1970. It is used widely in Unix-like and many other operating systems and file formats. It is neither a linear representatio... 2012-01-02, 3421👍, 0💬

What is C++?
What is C++? Released in 1985, C++ is an object-oriented programming language created by Bjarne Stroustrup. C++ maintains almost all aspects of the C language, while simplifying memory management and adding several features - including a new datatype known as a class (you will learn more about these... 2011-12-30, 2688👍, 0💬

What is an accessor? C++
What is an accessor? C++ An accessor is a class operation that does not modify the state of an object. The accessor functions need to be declared as const operations 2012-01-03, 2649👍, 0💬

What is the use of ‘using’ declaration. C++
What is the use of ‘using’ declaration. C++ A using declaration makes it possible to use a name from a namespace without the scope operator. 2012-01-05, 2635👍, 0💬

When does a name clash occur? C++
When does a name clash occur? C++ A name clash occurs when a name is defined in more than one place. For example., two different class libraries could give two different classes the same name. If you try to use many class libraries at the same time, there is a fair chance that you will be unable to ... 2012-01-04, 2616👍, 0💬

What is a modifier? C++
What is a modifier? C++ A modifier, also called a modifying function is a member function that changes the value of at least one data member. In other words, an operation that modifies the state of an object. Modifiers are also known as ‘mutators’. Example: The function mod is a modifier in the foll... 2011-12-30, 2613👍, 0💬

Differentiate between a template class and class template.C++
Differentiate between a template class and class template.C++ Template class: A generic definition or a parameterized class not instantiated until the client provides the needed information. It’s jargon for plain templates. Class template: A class template specifies how individual classes can be con... 2012-01-03, 2553👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.