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Diffstat (limited to 'libjava/classpath/java/util/zip/CheckedInputStream.java')
-rw-r--r-- | libjava/classpath/java/util/zip/CheckedInputStream.java | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/libjava/classpath/java/util/zip/CheckedInputStream.java b/libjava/classpath/java/util/zip/CheckedInputStream.java deleted file mode 100644 index 163a4c4..0000000 --- a/libjava/classpath/java/util/zip/CheckedInputStream.java +++ /dev/null @@ -1,135 +0,0 @@ -/* CheckedInputStream.java - Compute checksum of data being read - Copyright (C) 1999, 2000, 2004 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; - -/* Written using on-line Java Platform 1.2 API Specification - * and JCL book. - * Believed complete and correct. - */ - -/** - * InputStream that computes a checksum of the data being read using a - * supplied Checksum object. - * - * @see Checksum - * - * @author Tom Tromey - * @date May 17, 1999 - */ -public class CheckedInputStream extends FilterInputStream -{ - /** - * Creates a new CheckInputStream on top of the supplied OutputStream - * using the supplied Checksum. - */ - public CheckedInputStream (InputStream in, Checksum sum) - { - super (in); - this.sum = sum; - } - - /** - * Returns the Checksum object used. To get the data checksum computed so - * far call <code>getChecksum.getValue()</code>. - */ - public Checksum getChecksum () - { - return sum; - } - - /** - * Reads one byte, updates the checksum and returns the read byte - * (or -1 when the end of file was reached). - */ - public int read () throws IOException - { - int x = in.read(); - if (x != -1) - sum.update(x); - return x; - } - - /** - * Reads at most len bytes in the supplied buffer and updates the checksum - * with it. Returns the number of bytes actually read or -1 when the end - * of file was reached. - */ - public int read (byte[] buf, int off, int len) throws IOException - { - int r = in.read(buf, off, len); - if (r != -1) - sum.update(buf, off, r); - return r; - } - - /** - * Skips n bytes by reading them in a temporary buffer and updating the - * the checksum with that buffer. Returns the actual number of bytes skiped - * which can be less then requested when the end of file is reached. - */ - public long skip (long n) throws IOException - { - if (n == 0) - return 0; - - int min = (int) Math.min(n, 1024); - byte[] buf = new byte[min]; - - long s = 0; - while (n > 0) - { - int r = in.read(buf, 0, min); - if (r == -1) - break; - n -= r; - s += r; - min = (int) Math.min(n, 1024); - sum.update(buf, 0, r); - } - - return s; - } - - /** The checksum object. */ - private Checksum sum; -} |