/**
* Writes the "End of central dir record".
*
* @throws IOException on error
* @throws Zip64RequiredException if the archive's size exceeds 4 GByte or there are more than
* 65535 entries inside the archive and {@link Zip64Mode #setUseZip64} is {@link
* Zip64Mode#Never}.
*/
protected void writeCentralDirectoryEnd() throws IOException {
writeOut(EOCD_SIG);
// disk numbers
writeOut(ZERO);
writeOut(ZERO);
// number of entries
int numberOfEntries = entries.size();
if (numberOfEntries > ZIP64_MAGIC_SHORT && zip64Mode == Zip64Mode.Never) {
throw new Zip64RequiredException(Zip64RequiredException.TOO_MANY_ENTRIES_MESSAGE);
}
if (cdOffset > ZIP64_MAGIC && zip64Mode == Zip64Mode.Never) {
throw new Zip64RequiredException(Zip64RequiredException.ARCHIVE_TOO_BIG_MESSAGE);
}
byte[] num = ZipShort.getBytes(Math.min(numberOfEntries, ZIP64_MAGIC_SHORT));
writeOut(num);
writeOut(num);
// length and location of CD
writeOut(ZipLong.getBytes(Math.min(cdLength, ZIP64_MAGIC)));
writeOut(ZipLong.getBytes(Math.min(cdOffset, ZIP64_MAGIC)));
// ZIP file comment
ByteBuffer data = this.zipEncoding.encode(comment);
writeOut(ZipShort.getBytes(data.limit()));
writeOut(data.array(), data.arrayOffset(), data.limit() - data.position());
}
/**
* Looks up an extra field by its header id.
*
* @param type the header id
* @return null if no such field exists.
*/
public ZipExtraField getExtraField(ZipShort type) {
if (extraFields != null) {
for (ZipExtraField extraField : extraFields) {
if (type.equals(extraField.getHeaderId())) {
return extraField;
}
}
}
return null;
}
/**
* Remove an extra field.
*
* @param type the type of extra field to remove
*/
public void removeExtraField(ZipShort type) {
if (extraFields == null) {
throw new java.util.NoSuchElementException();
}
List<ZipExtraField> newResult = new ArrayList<ZipExtraField>();
for (ZipExtraField extraField : extraFields) {
if (!type.equals(extraField.getHeaderId())) {
newResult.add(extraField);
}
}
if (extraFields.length == newResult.size()) {
throw new java.util.NoSuchElementException();
}
extraFields = newResult.toArray(new ZipExtraField[newResult.size()]);
setExtra();
}
/**
* When using random access output, write the local file header and potentiall the ZIP64 extra
* containing the correct CRC and compressed/uncompressed sizes.
*/
private void rewriteSizesAndCrc(boolean actuallyNeedsZip64) throws IOException {
long save = raf.getFilePointer();
raf.seek(entry.localDataStart);
writeOut(ZipLong.getBytes(entry.entry.getCrc()));
if (!hasZip64Extra(entry.entry) || !actuallyNeedsZip64) {
writeOut(ZipLong.getBytes(entry.entry.getCompressedSize()));
writeOut(ZipLong.getBytes(entry.entry.getSize()));
} else {
writeOut(ZipLong.ZIP64_MAGIC.getBytes());
writeOut(ZipLong.ZIP64_MAGIC.getBytes());
}
if (hasZip64Extra(entry.entry)) {
// seek to ZIP64 extra, skip header and size information
raf.seek(
entry.localDataStart + 3 * WORD + 2 * SHORT + getName(entry.entry).limit() + 2 * SHORT);
// inside the ZIP64 extra uncompressed size comes
// first, unlike the LFH, CD or data descriptor
writeOut(ZipEightByteInteger.getBytes(entry.entry.getSize()));
writeOut(ZipEightByteInteger.getBytes(entry.entry.getCompressedSize()));
if (!actuallyNeedsZip64) {
// do some cleanup:
// * rewrite version needed to extract
raf.seek(entry.localDataStart - 5 * SHORT);
writeOut(ZipShort.getBytes(INITIAL_VERSION));
// * remove ZIP64 extra so it doesn't get written
// to the central directory
entry.entry.removeExtraField(Zip64ExtendedInformationExtraField.HEADER_ID);
entry.entry.setExtra();
// * reset hasUsedZip64 if it has been set because
// of this entry
if (entry.causedUseOfZip64) {
hasUsedZip64 = false;
}
}
}
raf.seek(save);
}
private void writeVersionNeededToExtractAndGeneralPurposeBits(
final int zipMethod, final boolean utfFallback, final boolean zip64) throws IOException {
// CheckStyle:MagicNumber OFF
int versionNeededToExtract = INITIAL_VERSION;
GeneralPurposeBit b = new GeneralPurposeBit();
b.useUTF8ForNames(useUTF8Flag || utfFallback);
if (zipMethod == DEFLATED && raf == null) {
// requires version 2 as we are going to store length info
// in the data descriptor
versionNeededToExtract = DATA_DESCRIPTOR_MIN_VERSION;
b.useDataDescriptor(true);
}
if (zip64) {
versionNeededToExtract = ZIP64_MIN_VERSION;
}
// CheckStyle:MagicNumber ON
// version needed to extract
writeOut(ZipShort.getBytes(versionNeededToExtract));
// general purpose bit flag
writeOut(b.encode());
}
/**
* Writes the central file header entry.
*
* @param ze the entry to write
* @throws IOException on error
* @throws Zip64RequiredException if the archive's size exceeds 4 GByte and {@link Zip64Mode
* #setUseZip64} is {@link Zip64Mode#Never}.
*/
protected void writeCentralFileHeader(ZipArchiveEntry ze) throws IOException {
writeOut(CFH_SIG);
written += WORD;
final long lfhOffset = offsets.get(ze).longValue();
final boolean needsZip64Extra =
hasZip64Extra(ze)
|| ze.getCompressedSize() >= ZIP64_MAGIC
|| ze.getSize() >= ZIP64_MAGIC
|| lfhOffset >= ZIP64_MAGIC;
if (needsZip64Extra && zip64Mode == Zip64Mode.Never) {
// must be the offset that is too big, otherwise an
// exception would have been throw in putArchiveEntry or
// closeArchiveEntry
throw new Zip64RequiredException(Zip64RequiredException.ARCHIVE_TOO_BIG_MESSAGE);
}
handleZip64Extra(ze, lfhOffset, needsZip64Extra);
// version made by
// CheckStyle:MagicNumber OFF
writeOut(
ZipShort.getBytes(
(ze.getPlatform() << 8)
| (!hasUsedZip64 ? DATA_DESCRIPTOR_MIN_VERSION : ZIP64_MIN_VERSION)));
written += SHORT;
final int zipMethod = ze.getMethod();
final boolean encodable = zipEncoding.canEncode(ze.getName());
writeVersionNeededToExtractAndGeneralPurposeBits(
zipMethod, !encodable && fallbackToUTF8, needsZip64Extra);
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()));
if (ze.getCompressedSize() >= ZIP64_MAGIC || ze.getSize() >= ZIP64_MAGIC) {
writeOut(ZipLong.ZIP64_MAGIC.getBytes());
writeOut(ZipLong.ZIP64_MAGIC.getBytes());
} else {
writeOut(ZipLong.getBytes(ze.getCompressedSize()));
writeOut(ZipLong.getBytes(ze.getSize()));
}
// CheckStyle:MagicNumber OFF
written += 12;
// CheckStyle:MagicNumber ON
ByteBuffer name = getName(ze);
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 = "";
}
ByteBuffer commentB = getEntryEncoding(ze).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(ZipLong.getBytes(Math.min(lfhOffset, ZIP64_MAGIC)));
written += WORD;
// file name
writeOut(name.array(), name.arrayOffset(), name.limit() - name.position());
written += name.limit();
// extra field
writeOut(extra);
written += extra.length;
// file comment
writeOut(commentB.array(), commentB.arrayOffset(), commentB.limit() - commentB.position());
written += commentB.limit();
}
/**
* Writes the local file header entry
*
* @param ze the entry to write
* @throws IOException on error
*/
protected void writeLocalFileHeader(ZipArchiveEntry ze) throws IOException {
boolean encodable = zipEncoding.canEncode(ze.getName());
ByteBuffer name = getName(ze);
if (createUnicodeExtraFields != UnicodeExtraFieldPolicy.NEVER) {
addUnicodeExtraFields(ze, encodable, name);
}
offsets.put(ze, Long.valueOf(written));
writeOut(LFH_SIG);
written += WORD;
// store method in local variable to prevent multiple method calls
final int zipMethod = ze.getMethod();
writeVersionNeededToExtractAndGeneralPurposeBits(
zipMethod, !encodable && fallbackToUTF8, hasZip64Extra(ze));
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
entry.localDataStart = written;
if (zipMethod == DEFLATED || raf != null) {
writeOut(LZERO);
if (hasZip64Extra(entry.entry)) {
// point to ZIP64 extended information extra field for
// sizes, may get rewritten once sizes are known if
// stream is seekable
writeOut(ZipLong.ZIP64_MAGIC.getBytes());
writeOut(ZipLong.ZIP64_MAGIC.getBytes());
} else {
writeOut(LZERO);
writeOut(LZERO);
}
} else {
writeOut(ZipLong.getBytes(ze.getCrc()));
byte[] size = ZipLong.ZIP64_MAGIC.getBytes();
if (!hasZip64Extra(ze)) {
size = ZipLong.getBytes(ze.getSize());
}
writeOut(size);
writeOut(size);
}
// 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(name.array(), name.arrayOffset(), name.limit() - name.position());
written += name.limit();
// extra field
writeOut(extra);
written += extra.length;
entry.dataStart = written;
}
/**
* Writes the "ZIP64 End of central dir record" and "ZIP64 End of central dir
* locator".
*
* @throws IOException on error
* @since 1.3
*/
protected void writeZip64CentralDirectory() throws IOException {
if (zip64Mode == Zip64Mode.Never) {
return;
}
if (!hasUsedZip64
&& (cdOffset >= ZIP64_MAGIC
|| cdLength >= ZIP64_MAGIC
|| entries.size() >= ZIP64_MAGIC_SHORT)) {
// actually "will use"
hasUsedZip64 = true;
}
if (!hasUsedZip64) {
return;
}
long offset = written;
writeOut(ZIP64_EOCD_SIG);
// size, we don't have any variable length as we don't support
// the extensible data sector, yet
writeOut(
ZipEightByteInteger.getBytes(
SHORT /* version made by */
+ SHORT /* version needed to extract */
+ WORD /* disk number */
+ WORD /* disk with central directory */
+ DWORD /* number of entries in CD on this disk */
+ DWORD /* total number of entries */
+ DWORD /* size of CD */
+ DWORD /* offset of CD */));
// version made by and version needed to extract
writeOut(ZipShort.getBytes(ZIP64_MIN_VERSION));
writeOut(ZipShort.getBytes(ZIP64_MIN_VERSION));
// disk numbers - four bytes this time
writeOut(LZERO);
writeOut(LZERO);
// number of entries
byte[] num = ZipEightByteInteger.getBytes(entries.size());
writeOut(num);
writeOut(num);
// length and location of CD
writeOut(ZipEightByteInteger.getBytes(cdLength));
writeOut(ZipEightByteInteger.getBytes(cdOffset));
// no "zip64 extensible data sector" for now
// and now the "ZIP64 end of central directory locator"
writeOut(ZIP64_EOCD_LOC_SIG);
// disk number holding the ZIP64 EOCD record
writeOut(LZERO);
// relative offset of ZIP64 EOCD record
writeOut(ZipEightByteInteger.getBytes(offset));
// total number of disks
writeOut(ONE);
}
/**
* Create instance from the two bytes starting at offset.
*
* @param bytes the bytes to store as a ZipShort
* @param offset the offset to start
*/
public ZipShort(byte[] bytes, int offset) {
value = ZipShort.getValue(bytes, offset);
}