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#62451 - Document last printed in the year 27321 

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1833668 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Andreas Beeker 2018-06-17 16:59:48 +00:00
parent de9b2e0481
commit 0a999d8cd3
2 changed files with 58 additions and 45 deletions
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86
src/java/org/apache/poi/hpsf/Filetime.java
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@ -16,15 +16,23 @@
==================================================================== */
package org.apache.poi.hpsf;
import static org.apache.poi.util.LittleEndianConsts.LONG_SIZE;
import java.io.IOException;
import java.io.OutputStream;
import java.math.BigInteger;
import java.util.Date;
import org.apache.poi.util.Internal;
import org.apache.poi.util.LittleEndian;
import org.apache.poi.util.LittleEndianByteArrayInputStream;
import org.apache.poi.util.LittleEndianConsts;
/**
* The Windows FILETIME structure holds a date and time associated with a
* file. The structure identifies a 64-bit integer specifying the
* number of 100-nanosecond intervals which have passed since
* January 1, 1601, Coordinated Universal Time (UTC).
*/
@Internal
public class Filetime {
/**
@ -32,74 +40,47 @@ public class Filetime {
* 00:00:00) and the Unix epoch (1970-01-01 00:00:00) in
* milliseconds.
*/
private static final long EPOCH_DIFF = -11644473600000L;
private static final BigInteger EPOCH_DIFF = BigInteger.valueOf(-11_644_473_600_000L);
private static final int SIZE = LittleEndian.INT_SIZE * 2;
private static final long UINT_MASK = 0x00000000FFFFFFFFL;
private static final long NANO_100 = 1000L * 10L;
/** Factor between filetime long and date milliseconds */
private static final BigInteger NANO_100 = BigInteger.valueOf(10_000L);
private int _dwHighDateTime;
private int _dwLowDateTime;
private long fileTime;
public Filetime() {}
public Filetime( int low, int high ) {
_dwLowDateTime = low;
_dwHighDateTime = high;
}
public Filetime( Date date ) {
long filetime = Filetime.dateToFileTime(date);
_dwHighDateTime = (int) ((filetime >>> 32) & UINT_MASK);
_dwLowDateTime = (int) (filetime & UINT_MASK);
fileTime = dateToFileTime(date);
}
public void read( LittleEndianByteArrayInputStream lei ) {
_dwLowDateTime = lei.readInt();
_dwHighDateTime = lei.readInt();
}
public long getHigh() {
return _dwHighDateTime;
}
public long getLow() {
return _dwLowDateTime;
fileTime = lei.readLong();
}
public byte[] toByteArray() {
byte[] result = new byte[SIZE];
LittleEndian.putInt( result, 0 * LittleEndianConsts.INT_SIZE, _dwLowDateTime );
LittleEndian.putInt( result, 1 * LittleEndianConsts.INT_SIZE, _dwHighDateTime );
byte[] result = new byte[LONG_SIZE];
LittleEndian.putLong( result, 0, fileTime);
return result;
}
public int write( OutputStream out ) throws IOException {
LittleEndian.putInt( _dwLowDateTime, out );
LittleEndian.putInt( _dwHighDateTime, out );
return SIZE;
out.write(toByteArray());
return LONG_SIZE;
}
public Date getJavaValue() {
long l = (((long)_dwHighDateTime) << 32) | (_dwLowDateTime & UINT_MASK);
return filetimeToDate( l );
return filetimeToDate( fileTime );
}
/**
* Converts a Windows FILETIME into a {@link Date}. The Windows
* FILETIME structure holds a date and time associated with a
* file. The structure identifies a 64-bit integer specifying the
* number of 100-nanosecond intervals which have passed since
* January 1, 1601.
* Converts a Windows FILETIME (in UTC) into a {@link Date} (in UTC).
*
* @param filetime The filetime to convert.
* @return The Windows FILETIME as a {@link Date}.
*/
public static Date filetimeToDate(final long filetime) {
final long ms_since_16010101 = filetime / NANO_100;
final long ms_since_19700101 = ms_since_16010101 + EPOCH_DIFF;
return new Date(ms_since_19700101);
final BigInteger bi = (filetime < 0) ? twoComplement(filetime) : BigInteger.valueOf(filetime);
return new Date(bi.divide(NANO_100).add(EPOCH_DIFF).longValue());
}
/**
@ -111,9 +92,7 @@ public class Filetime {
* @see #filetimeToDate(long)
*/
public static long dateToFileTime(final Date date) {
long ms_since_19700101 = date.getTime();
long ms_since_16010101 = ms_since_19700101 - EPOCH_DIFF;
return ms_since_16010101 * NANO_100;
return BigInteger.valueOf(date.getTime()).subtract(EPOCH_DIFF).multiply(NANO_100).longValue();
}
/**
@ -125,4 +104,21 @@ public class Filetime {
public static boolean isUndefined(Date date) {
return (date == null || dateToFileTime(date) == 0);
}
private static BigInteger twoComplement(final long val) {
// for negative BigInteger, top byte is negative
final byte[] contents = {
(byte)(val < 0 ? 0 : -1),
(byte)((val >> 56) & 0xFF),
(byte)((val >> 48) & 0xFF),
(byte)((val >> 40) & 0xFF),
(byte)((val >> 32) & 0xFF),
(byte)((val >> 24) & 0xFF),
(byte)((val >> 16) & 0xFF),
(byte)((val >> 8) & 0xFF),
(byte)(val & 0xFF),
};
return new BigInteger(contents);
}
}

17
src/testcases/org/apache/poi/hpsf/basic/TestHPSFBugs.java
View File

@ -170,4 +170,21 @@ public final class TestHPSFBugs {
fs.close();
}
@Test
public void bug62451() throws IOException {
final long millis = 920355314183864L;
try (HSSFWorkbook wb = new HSSFWorkbook()) {
wb.createSheet().createRow(0).createCell(0).setCellValue("foo");
wb.createInformationProperties();
SummaryInformation si = wb.getSummaryInformation();
si.setLastPrinted(new Date(millis));
try (HSSFWorkbook wb2 = HSSFTestDataSamples.writeOutAndReadBack(wb)) {
SummaryInformation si2 = wb2.getSummaryInformation();
Date d = si.getLastPrinted();
assertNotNull(d);
assertEquals(millis, d.getTime());
}
}
}
}