src/java.base/windows/classes/sun/nio/fs/WindowsFileAttributes.java

*** 1,7 ****
  /*
!  * Copyright (c) 2008, 2012, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
--- 1,7 ----
  /*
!  * Copyright (c) 2008, 2019, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
*** 106,117 ****
      private static final short OFFSETOF_FIND_DATA_LASTWRITETIME = 20;
      private static final short OFFSETOF_FIND_DATA_SIZEHIGH = 28;
      private static final short OFFSETOF_FIND_DATA_SIZELOW = 32;
      private static final short OFFSETOF_FIND_DATA_RESERVED0 = 36;
  
!     // used to adjust values between Windows and java epoch
!     private static final long WINDOWS_EPOCH_IN_MICROSECONDS = -11644473600000000L;
  
      // indicates if accurate metadata is required (interesting on NTFS only)
      private static final boolean ensureAccurateMetadata;
      static {
          String propValue = GetPropertyAction.privilegedGetProperty(
--- 106,118 ----
      private static final short OFFSETOF_FIND_DATA_LASTWRITETIME = 20;
      private static final short OFFSETOF_FIND_DATA_SIZEHIGH = 28;
      private static final short OFFSETOF_FIND_DATA_SIZELOW = 32;
      private static final short OFFSETOF_FIND_DATA_RESERVED0 = 36;
  
!     // used to adjust values between Windows and java epochs
!     private static final long WINDOWS_EPOCH_IN_MICROS = -11644473600000000L;
!     private static final long WINDOWS_EPOCH_IN_100NS  = -116444736000000000L;
  
      // indicates if accurate metadata is required (interesting on NTFS only)
      private static final boolean ensureAccurateMetadata;
      static {
          String propValue = GetPropertyAction.privilegedGetProperty(
*** 135,162 ****
      /**
       * Convert 64-bit value representing the number of 100-nanosecond intervals
       * since January 1, 1601 to a FileTime.
       */
      static FileTime toFileTime(long time) {
!         // 100ns -> us
!         time /= 10L;
!         // adjust to java epoch
!         time += WINDOWS_EPOCH_IN_MICROSECONDS;
!         return FileTime.from(time, TimeUnit.MICROSECONDS);
      }
  
      /**
!      * Convert FileTime to 64-bit value representing the number of 100-nanosecond
!      * intervals since January 1, 1601.
       */
      static long toWindowsTime(FileTime time) {
!         long value = time.to(TimeUnit.MICROSECONDS);
!         // adjust to Windows epoch+= 11644473600000000L;
!         value -= WINDOWS_EPOCH_IN_MICROSECONDS;
!         // us -> 100ns
!         value *= 10L;
!         return value;
      }
  
      /**
       * Initialize a new instance of this class
       */
--- 136,162 ----
      /**
       * Convert 64-bit value representing the number of 100-nanosecond intervals
       * since January 1, 1601 to a FileTime.
       */
      static FileTime toFileTime(long time) {
!         try {
!             long adjusted = Math.addExact(time, WINDOWS_EPOCH_IN_100NS);
!             long nanos = Math.multiplyExact(adjusted, 100L);
!             return FileTime.from(nanos, TimeUnit.NANOSECONDS);
!         } catch (ArithmeticException e) {
!             long micros = Math.addExact(time/10L, WINDOWS_EPOCH_IN_MICROS);
!             return FileTime.from(micros, TimeUnit.MICROSECONDS);
!         }
      }
  
      /**
!      * Convert FileTime to 64-bit value representing the number of
!      * 100-nanosecond intervals since January 1, 1601.
       */
      static long toWindowsTime(FileTime time) {
!         long adjusted = time.to(TimeUnit.NANOSECONDS)/100L;
!         return adjusted - WINDOWS_EPOCH_IN_100NS;
      }
  
      /**
       * Initialize a new instance of this class
       */