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Diffstat (limited to 'libjava/java/util/zip/InflaterInputStream.java')
| -rw-r--r-- | libjava/java/util/zip/InflaterInputStream.java | 264 |
1 files changed, 0 insertions, 264 deletions
diff --git a/libjava/java/util/zip/InflaterInputStream.java b/libjava/java/util/zip/InflaterInputStream.java deleted file mode 100644 index 11b06d24a28..00000000000 --- a/libjava/java/util/zip/InflaterInputStream.java +++ /dev/null @@ -1,264 +0,0 @@ -/* InflaterInputStream.java - Input stream filter for decompressing - Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 - Free Software Foundation, Inc. - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath is distributed in the hope that it will be useful, but -WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - - -package java.util.zip; - -import java.io.FilterInputStream; -import java.io.IOException; -import java.io.InputStream; - -/** - * This filter stream is used to decompress data compressed in the "deflate" - * format. The "deflate" format is described in RFC 1951. - * - * This stream may form the basis for other decompression filters, such - * as the <code>GZIPInputStream</code>. - * - * @author John Leuner - * @author Tom Tromey - * @since 1.1 - */ -public class InflaterInputStream extends FilterInputStream -{ - /** - * Decompressor for this filter - */ - protected Inflater inf; - - /** - * Byte array used as a buffer - */ - protected byte[] buf; - - /** - * Size of buffer - */ - protected int len; - - // We just use this if we are decoding one byte at a time with the - // read() call. - private byte[] onebytebuffer = new byte[1]; - - /** - * Create an InflaterInputStream with the default decompresseor - * and a default buffer size. - * - * @param in the InputStream to read bytes from - */ - public InflaterInputStream(InputStream in) - { - this(in, new Inflater(), 4096); - } - - /** - * Create an InflaterInputStream with the specified decompresseor - * and a default buffer size. - * - * @param in the InputStream to read bytes from - * @param inf the decompressor used to decompress data read from in - */ - public InflaterInputStream(InputStream in, Inflater inf) - { - this(in, inf, 4096); - } - - /** - * Create an InflaterInputStream with the specified decompresseor - * and a specified buffer size. - * - * @param in the InputStream to read bytes from - * @param inf the decompressor used to decompress data read from in - * @param size size of the buffer to use - */ - public InflaterInputStream(InputStream in, Inflater inf, int size) - { - super(in); - - if (in == null) - throw new NullPointerException("in may not be null"); - if (inf == null) - throw new NullPointerException("inf may not be null"); - if (size < 0) - throw new IllegalArgumentException("size may not be negative"); - - this.inf = inf; - this.buf = new byte [size]; - } - - /** - * Returns 0 once the end of the stream (EOF) has been reached. - * Otherwise returns 1. - */ - public int available() throws IOException - { - // According to the JDK 1.2 docs, this should only ever return 0 - // or 1 and should not be relied upon by Java programs. - if (inf == null) - throw new IOException("stream closed"); - return inf.finished() ? 0 : 1; - } - - /** - * Closes the input stream - */ - public synchronized void close() throws IOException - { - inf = null; - super.close(); - } - - /** - * Fills the buffer with more data to decompress. - */ - protected void fill() throws IOException - { - if (in == null) - throw new ZipException ("InflaterInputStream is closed"); - - len = in.read(buf, 0, buf.length); - - if (len < 0) - throw new ZipException("Deflated stream ends early."); - - inf.setInput(buf, 0, len); - } - - /** - * Reads one byte of decompressed data. - * - * The byte is in the lower 8 bits of the int. - */ - public int read() throws IOException - { - int nread = read(onebytebuffer, 0, 1); - if (nread > 0) - return onebytebuffer[0] & 0xff; - return -1; - } - - /** - * Decompresses data into the byte array - * - * @param b the array to read and decompress data into - * @param off the offset indicating where the data should be placed - * @param len the number of bytes to decompress - */ - public int read(byte[] b, int off, int len) throws IOException - { - if (inf == null) - throw new IOException("stream closed"); - if (len == 0) - return 0; - if (inf.finished()) - return -1; - - int count = 0; - while (count == 0) - { - if (inf.needsInput()) - fill(); - - try - { - count = inf.inflate(b, off, len); - if (count == 0) - { - if (this.len == -1) - { - // Couldn't get any more data to feed to the Inflater - return -1; - } - if (inf.needsDictionary()) - throw new ZipException("Inflater needs Dictionary"); - } - } - catch (DataFormatException dfe) - { - throw new ZipException(dfe.getMessage()); - } - } - return count; - } - - /** - * Skip specified number of bytes of uncompressed data - * - * @param n number of bytes to skip - */ - public long skip(long n) throws IOException - { - if (inf == null) - throw new IOException("stream closed"); - if (n < 0) - throw new IllegalArgumentException(); - - if (n == 0) - return 0; - - int buflen = (int) Math.min(n, 2048); - byte[] tmpbuf = new byte[buflen]; - - long skipped = 0L; - while (n > 0L) - { - int numread = read(tmpbuf, 0, buflen); - if (numread <= 0) - break; - n -= numread; - skipped += numread; - buflen = (int) Math.min(n, 2048); - } - - return skipped; - } - - public boolean markSupported() - { - return false; - } - - public void mark(int readLimit) - { - } - - public void reset() throws IOException - { - throw new IOException("reset not supported"); - } -} |
