corda/classpath/java/util/zip/DeflaterOutputStream.java
Joel Dice 87b02eb949 update copyright years
Previously, I used a shell script to extract modification date ranges
from the Git history, but that was complicated and unreliable, so now
every file just gets the same year range in its copyright header.  If
someone needs to know when a specific file was modified and by whom,
they can look at the Git history themselves; no need to include it
redundantly in the header.
2013-07-02 20:52:38 -06:00

78 lines
2.1 KiB
Java

/* Copyright (c) 2008-2013, Avian Contributors
Permission to use, copy, modify, and/or distribute this software
for any purpose with or without fee is hereby granted, provided
that the above copyright notice and this permission notice appear
in all copies.
There is NO WARRANTY for this software. See license.txt for
details. */
package java.util.zip;
import java.io.OutputStream;
import java.io.IOException;
public class DeflaterOutputStream extends OutputStream {
private final OutputStream out;
private final Deflater deflater;
private final byte[] buffer;
public DeflaterOutputStream(OutputStream out, Deflater deflater, int bufferSize)
{
this.out = out;
this.deflater = deflater;
this.buffer = new byte[bufferSize];
}
public DeflaterOutputStream(OutputStream out, Deflater deflater) {
this(out, deflater, 4 * 1024);
}
public DeflaterOutputStream(OutputStream out) {
this(out, new Deflater());
}
public void write(int b) throws IOException {
byte[] buffer = new byte[1];
buffer[0] = (byte)(b & 0xff);
write(buffer, 0, 1);
}
public void write(byte[] b, int offset, int length) throws IOException {
// error condition checking
if (deflater.finished()) {
throw new IOException("Already at end of stream");
} else if (offset < 0) {
throw new IndexOutOfBoundsException("Offset can't be less than zero");
} else if (length < 0) {
throw new IndexOutOfBoundsException("Length can't be less than zero");
} else if (b.length - (offset + length) < 0) {
throw new IndexOutOfBoundsException("Offset + Length is larger than the input byte array");
} else if (length == 0) {
return;
}
deflater.setInput(b, offset, length);
while (deflater.getRemaining() > 0) {
deflate();
}
}
private void deflate() throws IOException {
int len = deflater.deflate(buffer, 0, buffer.length);
if (len > 0) {
out.write(buffer, 0, len);
}
}
public void close() throws IOException {
deflater.finish();
while (! deflater.finished()) {
deflate();
}
out.close();
deflater.dispose();
}
}