/**
* The actual data to put into local file data - without Header-ID
* or length specifier.
* @return get the data
*/
public byte[] getLocalFileDataData()
{
// CRC will be added later
byte[] data = new byte[getLocalFileDataLength().getValue() - WORD];
java.lang.SystemJ.arraycopy(ZipShort.getBytes(getMode()), 0, data, 0, 2);
byte[] linkArray = getLinkedFile().getBytes(); // Uses default charset - see class Javadoc
// CheckStyle:MagicNumber OFF
java.lang.SystemJ.arraycopy(ZipLong.getBytes(linkArray.Length),
0, data, 2, WORD);
java.lang.SystemJ.arraycopy(ZipShort.getBytes(getUserId()),
0, data, 6, 2);
java.lang.SystemJ.arraycopy(ZipShort.getBytes(getGroupId()),
0, data, 8, 2);
java.lang.SystemJ.arraycopy(linkArray, 0, data, 10, linkArray.Length);
// CheckStyle:MagicNumber ON
crc.reset();
crc.update(data);
long checksum = crc.getValue();
byte[] result = new byte[data.Length + WORD];
java.lang.SystemJ.arraycopy(ZipLong.getBytes(checksum), 0, result, 0, WORD);
java.lang.SystemJ.arraycopy(data, 0, result, WORD, data.Length);
return(result);
}
private void assembleData()
{
if (unicodeName == null)
{
return;
}
data = new byte[5 + unicodeName.Length];
// version 1
data[0] = 0x01;
java.lang.SystemJ.arraycopy(ZipLong.getBytes(nameCRC32), 0, data, 1, 4);
java.lang.SystemJ.arraycopy(unicodeName, 0, data, 5, unicodeName.Length);
}
/**
* Writes the data descriptor entry.
* @param ze the entry to write
* @throws IOException on error
*/
protected void writeDataDescriptor(ZipArchiveEntry ze) //throws IOException
{
if (ze.getMethod() != DEFLATED || raf != null)
{
return;
}
writeOut(DD_SIG);
writeOut(ZipLong.getBytes(entry.getCrc()));
writeOut(ZipLong.getBytes(entry.getCompressedSize()));
writeOut(ZipLong.getBytes(entry.getSize()));
// CheckStyle:MagicNumber OFF
written += 16;
// CheckStyle:MagicNumber ON
}
private void readDataDescriptor() //throws IOException
{
byte[] b = new byte[WORD];
readFully(b);
ZipLong val = new ZipLong(b);
if (ZipLong.DD_SIG.equals(val))
{
// data descriptor with signature, skip sig
readFully(b);
val = new ZipLong(b);
}
current.setCrc(val.getValue());
readFully(b);
current.setCompressedSize(new ZipLong(b).getValue());
readFully(b);
current.setSize(new ZipLong(b).getValue());
}
/**
* Searches for the "End of central dir record", parses
* it and positions the stream at the first central directory
* record.
*/
private void positionAtCentralDirectory()
//throws IOException
{
bool found = false;
long off = archive.length() - MIN_EOCD_SIZE;
long stopSearching = java.lang.Math.max(0L, archive.length() - MAX_EOCD_SIZE);
if (off >= 0)
{
archive.seek(off);
byte[] sig = ZipArchiveOutputStream.EOCD_SIG;
int curr = archive.read();
while (off >= stopSearching && curr != -1)
{
if (curr == sig[POS_0])
{
curr = archive.read();
if (curr == sig[POS_1])
{
curr = archive.read();
if (curr == sig[POS_2])
{
curr = archive.read();
if (curr == sig[POS_3])
{
found = true;
break;
}
}
}
}
archive.seek(--off);
curr = archive.read();
}
}
if (!found)
{
throw new java.util.zip.ZipException("archive is not a ZIP archive");
}
archive.seek(off + CFD_LOCATOR_OFFSET);
byte[] cfdOffset = new byte[WORD];
archive.readFully(cfdOffset);
archive.seek(ZipLong.getValue(cfdOffset));
}
/**
* Convert a Date object to a DOS date/time field.
*
* <p>Stolen from InfoZip's <code>fileio.c</code></p>
* @param t number of milliseconds since the epoch
* @return the date as a byte array
*/
public static byte[] toDosTime(long t)
{
java.util.Calendar c = java.util.Calendar.getInstance();
c.setTimeInMillis(t);
int year = c.get(java.util.Calendar.YEAR);
if (year < 1980)
{
return(copy(DOS_TIME_MIN)); // stop callers from changing the array
}
int month = c.get(java.util.Calendar.MONTH) + 1;
long value = ((year - 1980) << 25)
| (month << 21)
| (c.get(java.util.Calendar.DAY_OF_MONTH) << 16)
| (c.get(java.util.Calendar.HOUR_OF_DAY) << 11)
| (c.get(java.util.Calendar.MINUTE) << 5)
| (c.get(java.util.Calendar.SECOND) >> 1);
return(ZipLong.getBytes(value));
}
/** {@inheritDoc} */
public void parseFromLocalFileData(byte[] buffer, int offset, int length)
//throws ZipException
{
if (length < 5)
{
throw new java.util.zip.ZipException("UniCode path extra data must have at least 5 bytes.");
}
int version = buffer[offset];
if (version != 0x01)
{
throw new java.util.zip.ZipException("Unsupported version [" + version
+ "] for UniCode path extra data.");
}
nameCRC32 = ZipLong.getValue(buffer, offset + 1);
unicodeName = new byte[length - 5];
java.lang.SystemJ.arraycopy(buffer, offset + 5, unicodeName, 0, length - 5);
data = null;
}
/**
* Writes the "End of central dir record".
* @throws IOException on error
*/
protected void writeCentralDirectoryEnd() //throws IOException
{
writeOut(EOCD_SIG);
// disk numbers
writeOut(ZERO);
writeOut(ZERO);
// number of entries
byte[] num = ZipShort.getBytes(entries.size());
writeOut(num);
writeOut(num);
// length and location of CD
writeOut(ZipLong.getBytes(cdLength));
writeOut(ZipLong.getBytes(cdOffset));
// ZIP file comment
java.nio.ByteBuffer data = this.zipEncoding.encode(comment);
writeOut(ZipShort.getBytes(data.limit()));
writeOut((byte[])data.array(), data.arrayOffset(), data.limit());
}
/**
* Populate data from this array as if it was in local file data.
* @param data an array of bytes
* @param offset the start offset
* @param length the number of bytes in the array from offset
* @throws ZipException on error
*/
public void parseFromLocalFileData(byte[] data, int offset, int length)
//throws ZipException
{
long givenChecksum = ZipLong.getValue(data, offset);
byte[] tmp = new byte[length - WORD];
java.lang.SystemJ.arraycopy(data, offset + WORD, tmp, 0, length - WORD);
crc.reset();
crc.update(tmp);
long realChecksum = crc.getValue();
if (givenChecksum != realChecksum)
{
throw new java.util.zip.ZipException("bad CRC checksum "
+ java.lang.Long.toHexString(givenChecksum)
+ " instead of "
+ java.lang.Long.toHexString(realChecksum));
}
int newMode = ZipShort.getValue(tmp, 0);
// CheckStyle:MagicNumber OFF
byte[] linkArray = new byte[(int)ZipLong.getValue(tmp, 2)];
uid = ZipShort.getValue(tmp, 6);
gid = ZipShort.getValue(tmp, 8);
if (linkArray.Length == 0)
{
link = "";
}
else
{
java.lang.SystemJ.arraycopy(tmp, 10, linkArray, 0, linkArray.Length);
link = System.Text.ASCIIEncoding.ASCII.GetString(linkArray); // Uses default charset - see class Javadoc
}
// CheckStyle:MagicNumber ON
setDirectory((newMode & UnixStat.DIR_FLAG) != 0);
setMode(newMode);
}
/**
* Writes all necessary data for this entry.
* @throws IOException on error
*/
public override void closeArchiveEntry() //throws IOException
{
if (finished)
{
throw new java.io.IOException("Stream has already been finished");
}
if (entry == null)
{
throw new java.io.IOException("No current entry to close");
}
long realCrc = crc.getValue();
crc.reset();
if (entry.getMethod() == DEFLATED)
{
def.finish();
while (!def.finished())
{
deflate();
}
entry.setSize(ZipUtil.adjustToLong(def.getTotalIn()));
entry.setCompressedSize(ZipUtil.adjustToLong(def.getTotalOut()));
entry.setCrc(realCrc);
def.reset();
written += entry.getCompressedSize();
}
else if (raf == null)
{
if (entry.getCrc() != realCrc)
{
throw new java.util.zip.ZipException("bad CRC checksum for entry "
+ entry.getName() + ": "
+ java.lang.Long.toHexString(entry.getCrc())
+ " instead of "
+ java.lang.Long.toHexString(realCrc));
}
if (entry.getSize() != written - dataStart)
{
throw new java.util.zip.ZipException("bad size for entry "
+ entry.getName() + ": "
+ entry.getSize()
+ " instead of "
+ (written - dataStart));
}
}
else /* method is STORED and we used RandomAccessFile */
{
long size = written - dataStart;
entry.setSize(size);
entry.setCompressedSize(size);
entry.setCrc(realCrc);
}
// If random access output, write the local file header containing
// the correct CRC and compressed/uncompressed sizes
if (raf != null)
{
long save = raf.getFilePointer();
raf.seek(localDataStart);
writeOut(ZipLong.getBytes(entry.getCrc()));
writeOut(ZipLong.getBytes(entry.getCompressedSize()));
writeOut(ZipLong.getBytes(entry.getSize()));
raf.seek(save);
}
writeDataDescriptor(entry);
entry = null;
}
/**
* Reads the central directory of the given archive and populates
* the internal tables with ZipArchiveEntry instances.
*
* <p>The ZipArchiveEntrys will know all data that can be obtained from
* the central directory alone, but not the data that requires the
* local file header or additional data to be read.</p>
*
* @return a Map<ZipArchiveEntry, NameAndComment>> of
* zipentries that didn't have the language encoding flag set when
* read.
*/
private java.util.Map <ZipArchiveEntry, IAC_NameAndComment> populateFromCentralDirectory()
//throws IOException
{
java.util.HashMap <ZipArchiveEntry, IAC_NameAndComment> noUTF8Flag = new java.util.HashMap <ZipArchiveEntry, IAC_NameAndComment>();
positionAtCentralDirectory();
byte[] cfh = new byte[CFH_LEN];
byte[] signatureBytes = new byte[WORD];
archive.readFully(signatureBytes);
long sig = ZipLong.getValue(signatureBytes);
long cfhSig = ZipLong.getValue(ZipArchiveOutputStream.CFH_SIG);
if (sig != cfhSig && startsWithLocalFileHeader())
{
throw new java.io.IOException("central directory is empty, can't expand"
+ " corrupt archive.");
}
while (sig == cfhSig)
{
archive.readFully(cfh);
int off = 0;
ZipArchiveEntry ze = new ZipArchiveEntry();
int versionMadeBy = ZipShort.getValue(cfh, off);
off += SHORT;
ze.setPlatform((versionMadeBy >> BYTE_SHIFT) & NIBLET_MASK);
off += SHORT; // skip version info
GeneralPurposeBit gpFlag = GeneralPurposeBit.parse(cfh, off);
bool hasUTF8Flag = gpFlag.usesUTF8ForNames();
ZipEncoding entryEncoding =
hasUTF8Flag ? ZipEncodingHelper.UTF8_ZIP_ENCODING : zipEncoding;
ze.setGeneralPurposeBit(gpFlag);
off += SHORT;
ze.setMethod(ZipShort.getValue(cfh, off));
off += SHORT;
// FIXME this is actually not very cpu cycles friendly as we are converting from
// dos to java while the underlying Sun implementation will convert
// from java to dos time for internal storage...
long time = ZipUtil.dosToJavaTime(ZipLong.getValue(cfh, off));
ze.setTime(time);
off += WORD;
ze.setCrc(ZipLong.getValue(cfh, off));
off += WORD;
ze.setCompressedSize(ZipLong.getValue(cfh, off));
off += WORD;
ze.setSize(ZipLong.getValue(cfh, off));
off += WORD;
int fileNameLen = ZipShort.getValue(cfh, off);
off += SHORT;
int extraLen = ZipShort.getValue(cfh, off);
off += SHORT;
int commentLen = ZipShort.getValue(cfh, off);
off += SHORT;
off += SHORT; // disk number
ze.setInternalAttributes(ZipShort.getValue(cfh, off));
off += SHORT;
ze.setExternalAttributes(ZipLong.getValue(cfh, off));
off += WORD;
byte[] fileName = new byte[fileNameLen];
archive.readFully(fileName);
ze.setName(entryEncoding.decode(fileName));
// LFH offset,
IAC_OffsetEntry offset = new IAC_OffsetEntry();
offset.headerOffset = ZipLong.getValue(cfh, off);
// data offset will be filled later
entries.put(ze, offset);
nameMap.put(ze.getName(), ze);
byte[] cdExtraData = new byte[extraLen];
archive.readFully(cdExtraData);
ze.setCentralDirectoryExtra(cdExtraData);
byte[] comment = new byte[commentLen];
archive.readFully(comment);
ze.setComment(entryEncoding.decode(comment));
archive.readFully(signatureBytes);
sig = ZipLong.getValue(signatureBytes);
if (!hasUTF8Flag && useUnicodeExtraFields)
{
noUTF8Flag.put(ze, new IAC_NameAndComment(fileName, comment));
}
}
return(noUTF8Flag);
}
/**
* Create instance from bytes.
* @param bytes the bytes to store as a ZipLong
*/
public ZipLong(byte[] bytes)
{
value = ZipLong.getValue(bytes, 0);
}
/**
* Writes the central file header entry.
* @param ze the entry to write
* @throws IOException on error
*/
protected void writeCentralFileHeader(ZipArchiveEntry ze) //throws IOException
{
writeOut(CFH_SIG);
written += WORD;
// version made by
// CheckStyle:MagicNumber OFF
writeOut(ZipShort.getBytes((ze.getPlatform() << 8) | 20));
written += SHORT;
int zipMethod = ze.getMethod();
bool encodable = zipEncoding.canEncode(ze.getName());
writeVersionNeededToExtractAndGeneralPurposeBits(zipMethod,
!encodable &&
fallbackToUTF8);
written += WORD;
// compression method
writeOut(ZipShort.getBytes(zipMethod));
written += SHORT;
// last mod. time and date
writeOut(ZipUtil.toDosTime(ze.getTime()));
written += WORD;
// CRC
// compressed length
// uncompressed length
writeOut(ZipLong.getBytes(ze.getCrc()));
writeOut(ZipLong.getBytes(ze.getCompressedSize()));
writeOut(ZipLong.getBytes(ze.getSize()));
// CheckStyle:MagicNumber OFF
written += 12;
// CheckStyle:MagicNumber ON
// file name length
ZipEncoding entryEncoding;
if (!encodable && fallbackToUTF8)
{
entryEncoding = ZipEncodingHelper.UTF8_ZIP_ENCODING;
}
else
{
entryEncoding = zipEncoding;
}
java.nio.ByteBuffer name = entryEncoding.encode(ze.getName());
writeOut(ZipShort.getBytes(name.limit()));
written += SHORT;
// extra field length
byte[] extra = ze.getCentralDirectoryExtra();
writeOut(ZipShort.getBytes(extra.Length));
written += SHORT;
// file comment length
String comm = ze.getComment();
if (comm == null)
{
comm = "";
}
java.nio.ByteBuffer commentB = entryEncoding.encode(comm);
writeOut(ZipShort.getBytes(commentB.limit()));
written += SHORT;
// disk number start
writeOut(ZERO);
written += SHORT;
// internal file attributes
writeOut(ZipShort.getBytes(ze.getInternalAttributes()));
written += SHORT;
// external file attributes
writeOut(ZipLong.getBytes(ze.getExternalAttributes()));
written += WORD;
// relative offset of LFH
writeOut((byte[])offsets.get(ze));
written += WORD;
// file name
writeOut((byte[])name.array(), name.arrayOffset(), name.limit());
written += name.limit();
// extra field
writeOut(extra);
written += extra.Length;
// file comment
writeOut((byte[])commentB.array(), commentB.arrayOffset(), commentB.limit());
written += commentB.limit();
}
/**
* Create instance from the four bytes starting at offset.
* @param bytes the bytes to store as a ZipLong
* @param offset the offset to start
*/
public ZipLong(byte[] bytes, int offset)
{
value = ZipLong.getValue(bytes, offset);
}
/**
* Writes the local file header entry
* @param ze the entry to write
* @throws IOException on error
*/
protected void writeLocalFileHeader(ZipArchiveEntry ze) //throws IOException
{
bool encodable = zipEncoding.canEncode(ze.getName());
ZipEncoding entryEncoding;
if (!encodable && fallbackToUTF8)
{
entryEncoding = ZipEncodingHelper.UTF8_ZIP_ENCODING;
}
else
{
entryEncoding = zipEncoding;
}
java.nio.ByteBuffer name = entryEncoding.encode(ze.getName());
if (createUnicodeExtraFields != UnicodeExtraFieldPolicy.NEVER)
{
if (createUnicodeExtraFields == UnicodeExtraFieldPolicy.ALWAYS ||
!encodable)
{
ze.addExtraField(new UnicodePathExtraField(ze.getName(),
(byte[])name.array(),
name.arrayOffset(),
name.limit()));
}
String comm = ze.getComment();
if (comm != null && !"".equals(comm))
{
bool commentEncodable = this.zipEncoding.canEncode(comm);
if (createUnicodeExtraFields == UnicodeExtraFieldPolicy.ALWAYS ||
!commentEncodable)
{
java.nio.ByteBuffer commentB = entryEncoding.encode(comm);
ze.addExtraField(new UnicodeCommentExtraField(comm,
(byte[])commentB.array(),
commentB.arrayOffset(),
commentB.limit())
);
}
}
}
offsets.put(ze, ZipLong.getBytes(written));
writeOut(LFH_SIG);
written += WORD;
//store method in local variable to prevent multiple method calls
int zipMethod = ze.getMethod();
writeVersionNeededToExtractAndGeneralPurposeBits(zipMethod,
!encodable &&
fallbackToUTF8);
written += WORD;
// compression method
writeOut(ZipShort.getBytes(zipMethod));
written += SHORT;
// last mod. time and date
writeOut(ZipUtil.toDosTime(ze.getTime()));
written += WORD;
// CRC
// compressed length
// uncompressed length
localDataStart = written;
if (zipMethod == DEFLATED || raf != null)
{
writeOut(LZERO);
writeOut(LZERO);
writeOut(LZERO);
}
else
{
writeOut(ZipLong.getBytes(ze.getCrc()));
writeOut(ZipLong.getBytes(ze.getSize()));
writeOut(ZipLong.getBytes(ze.getSize()));
}
// CheckStyle:MagicNumber OFF
written += 12;
// CheckStyle:MagicNumber ON
// file name length
writeOut(ZipShort.getBytes(name.limit()));
written += SHORT;
// extra field length
byte[] extra = ze.getLocalFileDataExtra();
writeOut(ZipShort.getBytes(extra.Length));
written += SHORT;
// file name
writeOut((byte[])name.array(), name.arrayOffset(), name.limit());
written += name.limit();
// extra field
writeOut(extra);
written += extra.Length;
dataStart = written;
}
/**
* Get value as four bytes in big endian byte order.
* @return value as four bytes in big endian order
*/
public byte[] getBytes()
{
return(ZipLong.getBytes(value));
}
/**
* Convert a DOS date/time field to a Date object.
*
* @param zipDosTime contains the stored DOS time.
* @return a Date instance corresponding to the given time.
*/
public static java.util.Date fromDosTime(ZipLong zipDosTime)
{
long dosTime = zipDosTime.getValue();
return(new java.util.Date(dosToJavaTime(dosTime)));
}
public ZipArchiveEntry getNextZipEntry() //throws IOException
{
if (closed || hitCentralDirectory)
{
return(null);
}
if (current != null)
{
closeEntry();
}
byte[] lfh = new byte[LFH_LEN];
try {
readFully(lfh);
} catch (java.io.EOFException) {
return(null);
}
ZipLong sig = new ZipLong(lfh);
if (sig.equals(ZipLong.CFH_SIG))
{
hitCentralDirectory = true;
return(null);
}
if (!sig.equals(ZipLong.LFH_SIG))
{
return(null);
}
int off = WORD;
current = new ZipArchiveEntry();
int versionMadeBy = ZipShort.getValue(lfh, off);
off += SHORT;
current.setPlatform((versionMadeBy >> ZipFile.BYTE_SHIFT)
& ZipFile.NIBLET_MASK);
GeneralPurposeBit gpFlag = GeneralPurposeBit.parse(lfh, off);
bool hasUTF8Flag = gpFlag.usesUTF8ForNames();
ZipEncoding entryEncoding =
hasUTF8Flag ? ZipEncodingHelper.UTF8_ZIP_ENCODING : zipEncoding;
hasDataDescriptor = gpFlag.usesDataDescriptor();
current.setGeneralPurposeBit(gpFlag);
off += SHORT;
current.setMethod(ZipShort.getValue(lfh, off));
off += SHORT;
long time = ZipUtil.dosToJavaTime(ZipLong.getValue(lfh, off));
current.setTime(time);
off += WORD;
if (!hasDataDescriptor)
{
current.setCrc(ZipLong.getValue(lfh, off));
off += WORD;
current.setCompressedSize(ZipLong.getValue(lfh, off));
off += WORD;
current.setSize(ZipLong.getValue(lfh, off));
off += WORD;
}
else
{
off += 3 * WORD;
}
int fileNameLen = ZipShort.getValue(lfh, off);
off += SHORT;
int extraLen = ZipShort.getValue(lfh, off);
off += SHORT;
byte[] fileName = new byte[fileNameLen];
readFully(fileName);
current.setName(entryEncoding.decode(fileName));
byte[] extraData = new byte[extraLen];
readFully(extraData);
current.setExtra(extraData);
if (!hasUTF8Flag && useUnicodeExtraFields)
{
ZipUtil.setNameAndCommentFromExtraFields(current, fileName, null);
}
return(current);
}
