Fill in time_log() with code from http://www.suacommunity.com/dictionary/gettimeofday-entry.php <-thanks!

Originally committed to SVN as r4409.

aegisub/libaegisub/windows/util.cpp

@@ -24,9 +24,14 @@
 
 #include <string>
 #include <fstream>
+
+#include <time.h>
+#include <windows.h>
+
 #endif
 
-#include <string.h>
+//#include <string.h>
+#include "libaegisub/types.h"
 #include "libaegisub/util.h"
 #include "libaegisub/util_win.h"
 
@@ -70,6 +75,44 @@ std::string ErrorString(DWORD error) {
 	return str;
 }
 
+/// @brief Get seconds and microseconds.
+/// @param tv[out] timeval struct
+/// This code is from http://www.suacommunity.com/dictionary/gettimeofday-entry.php
+void time_log(timeval &tv) {
+#if defined(_MSC_VER) || defined(_MSC_EXTENSIONS)
+#define DELTA_EPOCH_IN_MICROSECS  11644473600000000Ui64
+#else
+#define DELTA_EPOCH_IN_MICROSECS  11644473600000000ULL
+#endif
+
+	// Define a structure to receive the current Windows filetime
+	FILETIME ft;
+ 
+	// Initialize the present time to 0 and the timezone to UTC
+	unsigned __int64 tmpres = 0;
+	static int tzflag = 0;
+
+	GetSystemTimeAsFileTime(&ft);
+ 
+	// The GetSystemTimeAsFileTime returns the number of 100 nanosecond 
+	// intervals since Jan 1, 1601 in a structure. Copy the high bits to 
+	// the 64 bit tmpres, shift it left by 32 then or in the low 32 bits.
+	tmpres |= ft.dwHighDateTime;
+	tmpres <<= 32;
+	tmpres |= ft.dwLowDateTime;
+ 
+	// Convert to microseconds by dividing by 10
+	tmpres /= 10;
+ 
+	// The Unix epoch starts on Jan 1 1970.  Need to subtract the difference 
+	// in seconds from Jan 1 1601.
+	tmpres -= DELTA_EPOCH_IN_MICROSECS;
+ 
+	// Finally change microseconds to seconds and place in the seconds value. 
+	// The modulus picks up the microseconds.
+	tv.tv_sec = (long)(tmpres / 1000000UL);
+	tv.tv_usec = (long)(tmpres % 1000000UL);
+}
 
 	} // namespace io
 } // namespace agi