public byte[] compress(byte[] buf, int start, int[] len) {
stream.next_in = buf;
stream.next_in_index = start;
stream.avail_in = len[0] - start;
int status;
int outputlen = start;
byte[] outputbuf = buf;
int tmp = 0;
do {
stream.next_out = tmpbuf;
stream.next_out_index = 0;
stream.avail_out = BUF_SIZE;
status = stream.deflate(JZlib.Z_PARTIAL_FLUSH);
switch (status) {
case JZlib.Z_OK:
tmp = BUF_SIZE - stream.avail_out;
if (outputbuf.length < outputlen + tmp + buffer_margin) {
byte[] foo = new byte[(outputlen + tmp + buffer_margin) * 2];
System.arraycopy(outputbuf, 0, foo, 0, outputbuf.length);
outputbuf = foo;
}
System.arraycopy(tmpbuf, 0, outputbuf, outputlen, tmp);
outputlen += tmp;
break;
default:
System.err.println("compress: deflate returnd " + status);
}
} while (stream.avail_out == 0);
len[0] = outputlen;
return outputbuf;
}
public int compress(byte[] buf, int start, int len, byte[] output) {
deflate.next_in = buf;
deflate.next_in_index = start;
deflate.avail_in = len - start;
if ((buf.length + 1024) > deflate_tmpbuf.length) {
deflate_tmpbuf = new byte[buf.length + 1024];
}
deflate.next_out = deflate_tmpbuf;
deflate.next_out_index = 0;
deflate.avail_out = output.length;
if (deflate.deflate(JZlib.Z_PARTIAL_FLUSH) != JZlib.Z_OK) {
System.err.println("compress: compression failure");
}
if (deflate.avail_in > 0) {
System.err.println("compress: deflated data too large");
}
int outputlen = output.length - deflate.avail_out;
System.arraycopy(deflate_tmpbuf, 0, output, 0, outputlen);
return outputlen;
}
@Override
public void compress(Buffer buffer) {
stream.next_in = buffer.array();
stream.next_in_index = buffer.rpos();
stream.avail_in = buffer.available();
buffer.wpos(buffer.rpos());
do {
stream.next_out = tempBuf;
stream.next_out_index = 0;
stream.avail_out = BUF_SIZE;
final int status = stream.deflate(JZlib.Z_PARTIAL_FLUSH);
if (status == JZlib.Z_OK) {
buffer.putRawBytes(tempBuf, 0, BUF_SIZE - stream.avail_out);
} else {
throw new SSHRuntimeException("compress: deflate returned " + status);
}
} while (stream.avail_out == 0);
}
public byte[] uncompress(byte[] buffer, int start, int[] length) {
int inflated_end = 0;
stream.next_in = buffer;
stream.next_in_index = start;
stream.avail_in = length[0];
while (true) {
stream.next_out = tmpbuf;
stream.next_out_index = 0;
stream.avail_out = BUF_SIZE;
int status = stream.inflate(JZlib.Z_PARTIAL_FLUSH);
switch (status) {
case JZlib.Z_OK:
if (inflated_buf.length < inflated_end + BUF_SIZE - stream.avail_out) {
int len = inflated_buf.length * 2;
if (len < inflated_end + BUF_SIZE - stream.avail_out)
len = inflated_end + BUF_SIZE - stream.avail_out;
byte[] foo = new byte[len];
System.arraycopy(inflated_buf, 0, foo, 0, inflated_end);
inflated_buf = foo;
}
System.arraycopy(tmpbuf, 0, inflated_buf, inflated_end, BUF_SIZE - stream.avail_out);
inflated_end += (BUF_SIZE - stream.avail_out);
length[0] = inflated_end;
break;
case JZlib.Z_BUF_ERROR:
if (inflated_end > buffer.length - start) {
byte[] foo = new byte[inflated_end + start];
System.arraycopy(buffer, 0, foo, 0, start);
System.arraycopy(inflated_buf, 0, foo, start, inflated_end);
buffer = foo;
} else {
System.arraycopy(inflated_buf, 0, buffer, start, inflated_end);
}
length[0] = inflated_end;
return buffer;
default:
System.err.println("uncompress: inflate returnd " + status);
return null;
}
}
}
@Override
public void uncompress(Buffer from, Buffer to) throws TransportException {
stream.next_in = from.array();
stream.next_in_index = from.rpos();
stream.avail_in = from.available();
while (true) {
stream.next_out = tempBuf;
stream.next_out_index = 0;
stream.avail_out = BUF_SIZE;
final int status = stream.inflate(JZlib.Z_PARTIAL_FLUSH);
switch (status) {
case JZlib.Z_OK:
to.putRawBytes(tempBuf, 0, BUF_SIZE - stream.avail_out);
break;
case JZlib.Z_BUF_ERROR:
return;
default:
throw new TransportException(
DisconnectReason.COMPRESSION_ERROR, "uncompress: inflate returned " + status);
}
}
}
public int compress(byte[] buf, int start, int len) {
stream.next_in = buf;
stream.next_in_index = start;
stream.avail_in = len - start;
int status;
int outputlen = start;
do {
stream.next_out = tmpbuf;
stream.next_out_index = 0;
stream.avail_out = BUF_SIZE;
status = stream.deflate(JZlib.Z_PARTIAL_FLUSH);
switch (status) {
case JZlib.Z_OK:
System.arraycopy(tmpbuf, 0, buf, outputlen, BUF_SIZE - stream.avail_out);
outputlen += (BUF_SIZE - stream.avail_out);
break;
default:
System.err.println("compress: deflate returnd " + status);
}
} while (stream.avail_out == 0);
return outputlen;
}
