/**
* Writes bytes to ZIP entry.
*
* @param b the byte array to write
* @param offset the start position to write from
* @param length the number of bytes to write
* @throws IOException on error
*/
@Override
public void write(byte[] b, int offset, int length) throws IOException {
if (entry == null) {
throw new IllegalStateException("No current entry");
}
ZipUtil.checkRequestedFeatures(entry.entry);
entry.hasWritten = true;
if (entry.entry.getMethod() == DEFLATED) {
writeDeflated(b, offset, length);
} else {
writeOut(b, offset, length);
written += length;
}
crc.update(b, offset, length);
count(length);
}
/** write implementation for DEFLATED entries. */
private void writeDeflated(byte[] b, int offset, int length) throws IOException {
if (length > 0 && !def.finished()) {
entry.bytesRead += length;
if (length <= DEFLATER_BLOCK_SIZE) {
def.setInput(b, offset, length);
deflateUntilInputIsNeeded();
} else {
final int fullblocks = length / DEFLATER_BLOCK_SIZE;
for (int i = 0; i < fullblocks; i++) {
def.setInput(b, offset + i * DEFLATER_BLOCK_SIZE, DEFLATER_BLOCK_SIZE);
deflateUntilInputIsNeeded();
}
final int done = fullblocks * DEFLATER_BLOCK_SIZE;
if (done < length) {
def.setInput(b, offset + done, length - done);
deflateUntilInputIsNeeded();
}
}
}
}
/**
* Get the existing ZIP64 extended information extra field or create a new one and add it to the
* entry.
*
* @since 1.3
*/
private Zip64ExtendedInformationExtraField getZip64Extra(ZipArchiveEntry ze) {
if (entry != null) {
entry.causedUseOfZip64 = !hasUsedZip64;
}
hasUsedZip64 = true;
Zip64ExtendedInformationExtraField z64 =
(Zip64ExtendedInformationExtraField)
ze.getExtraField(Zip64ExtendedInformationExtraField.HEADER_ID);
if (z64 == null) {
/*
System.err.println("Adding z64 for " + ze.getName()
+ ", method: " + ze.getMethod()
+ " (" + (ze.getMethod() == STORED) + ")"
+ ", raf: " + (raf != null));
*/
z64 = new Zip64ExtendedInformationExtraField();
}
// even if the field is there already, make sure it is the first one
ze.addAsFirstExtraField(z64);
return z64;
}
/**
* 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;
}