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API for interpreting runs of binary as values humans can understand
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/*
* Hex - a hex viewer and annotator
* Copyright (C) 2009-2014,2016-2017 Trejkaz, Hex Project
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see .
*/
package org.trypticon.hex.interpreters.dates;
import org.trypticon.hex.binary.Binary;
import org.trypticon.hex.interpreters.AbstractFixedLengthInterpreter;
import org.trypticon.hex.interpreters.primitives.LittleEndian;
import javax.annotation.Nonnull;
/**
* Interpreter for Windows NT {@code FILETIME} values, which are used in a number of other formats.
*
* @author trejkaz
*/
public class WindowsFileTimeInterpreter extends AbstractFixedLengthInterpreter {
// Computed using Calendar for January 1, 1601 00:00 UTC and then just taking the value.
private static final long EPOCH = -11644473600000L;
private static final int NANOS_PER_TIME_UNIT = 100;
private static final int TIME_UNITS_PER_MILLISECOND = 10000;
public WindowsFileTimeInterpreter() {
super(DateTime.class, 8);
}
@Nonnull
@Override
protected DateTime interpret(@Nonnull Binary binary, long position) {
// Value is the number of 100-nanosecond intervals since January 1, 1601 (UTC)
long value = LittleEndian.getLong(binary, position);
long millis = value / TIME_UNITS_PER_MILLISECOND;
int remainingNanos = (int) (value % TIME_UNITS_PER_MILLISECOND) * NANOS_PER_TIME_UNIT;
return new EpochDateTime(8, EPOCH, millis, remainingNanos);
}
}