Return 64-bit unsigned integer from FILETIME

Author: dbwiddis

CHANGES.md

@@ -17,8 +17,9 @@ Features
 * [#535](https://github.com/java-native-access/jna/pull/535): Added `SHEmptyRecycleBin`, `ShellExecuteEx` to `com.sun.jna.platform.win32.Shell32` - [@mlfreeman2](https://github.com/mlfreeman2).
 * [#535](https://github.com/java-native-access/jna/pull/535): Added `GetDesktopWindow` to `com.sun.jna.platform.win32.User32` - [@mlfreeman2](https://github.com/mlfreeman2).
 * [#543](https://github.com/java-native-access/jna/pull/543): Added `ProcessIdToSessionId`, `LoadLibraryEx`, `FreeLibrary` and `Find/Load/Lock/SizeofResource` to `com.sun.jna.platform.win32.Kernel32` - [@mlfreeman2](https://github.com/mlfreeman2).
-* [#547](https://github.com/java-native-access/jna/pull/547): Added `GetSystemTimes` to `com.sun.jna.platform.win32.Kernel32` - [@dbwiddis](https://github.com/dbwiddis).
 * [#545](https://github.com/java-native-access/jna/pull/545): Added `EnumResourceTypes` and `EnumResourceNames` to `com.sun.jna.platform.win32.Kernel32` - [@mlfreeman2](https://github.com/mlfreeman2).
+* [#547](https://github.com/java-native-access/jna/pull/547): Added `GetSystemTimes` to `com.sun.jna.platform.win32.Kernel32` - [@dbwiddis](https://github.com/dbwiddis).
+* [#548](https://github.com/java-native-access/jna/pull/548): Return 64-bit unsigned integer from `com.sun.jna.platform.win32.WinBase.FILETIME` - [@dbwiddis](https://github.com/dbwiddis).
 
 Bug Fixes
 ---------

contrib/platform/src/com/sun/jna/platform/win32/WinBase.java

@@ -23,6 +23,7 @@
 import com.sun.jna.Pointer;
 import com.sun.jna.Structure;
 import com.sun.jna.Union;
+import com.sun.jna.platform.win32.WinDef.DWORDLONG;
 import com.sun.jna.platform.win32.WinNT.HANDLE;
 import com.sun.jna.ptr.ByteByReference;
 import com.sun.jna.win32.StdCallLibrary;
@@ -264,13 +265,46 @@ public static long dateToFileTime(final Date date) {
             return ms_since_16010101 * 1000 * 10;
         }
 
+        /**
+         * <p>Converts this filetime into a {@link Date}</p>
+         * @return The {@link Date} represented by this filetime.
+         */
         public Date toDate() {
             return filetimeToDate(dwHighDateTime, dwLowDateTime);
         }
 
+        /**
+         * <p>Converts this filetime into a number of milliseconds which have
+         * passed since January 1, 1970 (UTC).</p>
+         * @return This filetime as a number of milliseconds which have passed
+         * since January 1, 1970 (UTC)
+         */
+        public long toTime() {
+            return toDate().getTime();
+        }
+
+        /**
+         * <p>Converts this filetime into a number of milliseconds which have
+         * passed since January 1, 1970 (UTC).</p>
+         * @return This filetime as a number of milliseconds which have passed
+         * since January 1, 1970 (UTC)
+         * @deprecated Replaced by {@link #toTime()}
+         */
+        @Deprecated
         public long toLong() {
             return toDate().getTime();
         }
+        
+        /**
+         * <p>Converts the two 32-bit unsigned integer parts of this filetime
+         * into a 64-bit unsigned integer representing the number of
+         * 100-nanosecond intervals since January 1, 1601 (UTC).</p>
+         * @return This filetime as a 64-bit unsigned integer number of
+         * 100-nanosecond intervals since January 1, 1601 (UTC).
+         */
+        public DWORDLONG toDWordLong() {
+            return new DWORDLONG((long) dwHighDateTime << 32 | dwLowDateTime & 0xffffffffL);
+        }
 
         @Override
         public String toString() {

contrib/platform/test/com/sun/jna/platform/win32/Kernel32Test.java

@@ -34,6 +34,7 @@
 import com.sun.jna.Platform;
 import com.sun.jna.Pointer;
 import com.sun.jna.platform.win32.BaseTSD.SIZE_T;
+import com.sun.jna.platform.win32.WinBase.FILETIME;
 import com.sun.jna.platform.win32.WinBase.MEMORYSTATUSEX;
 import com.sun.jna.platform.win32.WinBase.SYSTEM_INFO;
 import com.sun.jna.platform.win32.WinDef.DWORD;
@@ -387,14 +388,14 @@ public void testGetSystemInfo() {
 
     public void testGetSystemTimes() {
       Kernel32 kernel = Kernel32.INSTANCE;
-      WinBase.FILETIME lpIdleTime = new WinBase.FILETIME();
-      WinBase.FILETIME lpKernelTime = new WinBase.FILETIME();
-      WinBase.FILETIME lpUserTime = new WinBase.FILETIME();
+      FILETIME lpIdleTime = new FILETIME();
+      FILETIME lpKernelTime = new FILETIME();
+      FILETIME lpUserTime = new FILETIME();
       boolean succ = kernel.GetSystemTimes(lpIdleTime, lpKernelTime, lpUserTime);
       assertTrue(succ);
-      long idleTime = WinBase.FILETIME.dateToFileTime(lpIdleTime.toDate());
-      long kernelTime = WinBase.FILETIME.dateToFileTime(lpKernelTime.toDate());
-      long userTime = WinBase.FILETIME.dateToFileTime(lpUserTime.toDate());
+      long idleTime = lpIdleTime.toDWordLong().longValue();
+      long kernelTime = lpKernelTime.toDWordLong().longValue();
+      long userTime = lpUserTime.toDWordLong().longValue();
       // All should be >= 0.  kernel includes idle.
       assertTrue(idleTime >= 0);
       assertTrue(kernelTime >= idleTime);

contrib/platform/test/com/sun/jna/platform/win32/WinBaseTest.java

@@ -13,8 +13,10 @@
 package com.sun.jna.platform.win32;
 
 import java.util.Calendar;
+import java.util.Date;
 
 import com.sun.jna.platform.win32.WinBase.DCB;
+import com.sun.jna.platform.win32.WinBase.FILETIME;
 import com.sun.jna.platform.win32.WinBase.SYSTEMTIME;
 
 import junit.framework.TestCase;
@@ -28,6 +30,16 @@ public WinBaseTest(String name) {
         super(name);
     }
 
+    public void testFiletime() {
+        // subtract to convert ms after 1/1/1970 to ms after 1/1/1601
+        long epochDiff = 11644473600000L;
+        // Construct filetimes for ms after 1/1/1601, check for 100-ns after
+        assertEquals("Mismatched filetime for 2ms", (new FILETIME(new Date(2L - epochDiff))).toDWordLong().longValue(), 2L * 10000);
+        assertEquals("Mismatched filetime for 2^31ms", (new FILETIME(new Date((1L << 31) - epochDiff))).toDWordLong().longValue(), (1L << 31) * 10000);
+        assertEquals("Mismatched filetime for 2^32ms", (new FILETIME(new Date((1L << 32) - epochDiff))).toDWordLong().longValue(), (1L << 32) * 10000);
+        assertEquals("Mismatched filetime for 2^60ms", (new FILETIME(new Date((1L << 60) - epochDiff))).toDWordLong().longValue(), (1L << 60) * 10000);
+    }
+
     public void testCalendarToSystemTimeConversion() {
         Calendar expected = Calendar.getInstance();
         SYSTEMTIME sysTime = new SYSTEMTIME();