X-Git-Url: https://oss.titaniummirror.com/gitweb?a=blobdiff_plain;f=libjava%2Fjava%2Futil%2Fzip%2FGZIPInputStream.java;fp=libjava%2Fjava%2Futil%2Fzip%2FGZIPInputStream.java;h=0000000000000000000000000000000000000000;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=07e4959e474d4804fde17832542c0fa28fd70ee7;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git diff --git a/libjava/java/util/zip/GZIPInputStream.java b/libjava/java/util/zip/GZIPInputStream.java deleted file mode 100644 index 07e4959e..00000000 --- a/libjava/java/util/zip/GZIPInputStream.java +++ /dev/null @@ -1,181 +0,0 @@ -/* GZIPInputStream.java - Input filter for reading gzip file - Copyright (C) 1999, 2000 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., 59 Temple Place, Suite 330, Boston, MA -02111-1307 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.InputStream; -import java.io.IOException; - -/** - * @author Tom Tromey - * @date May 17, 1999 - */ - -/* Written using on-line Java Platform 1.2 API Specification - * and JCL book. - * Believed complete and correct. - */ - -public class GZIPInputStream extends InflaterInputStream -{ - public static final int GZIP_MAGIC = 0x8b1f; - - public void close () throws IOException - { - // Nothing to do here. - super.close(); - } - - public GZIPInputStream (InputStream istream) throws IOException - { - this (istream, 512); - } - - private final int eof_read () throws IOException - { - int r = in.read(); - if (r == -1) - throw new ZipException ("gzip header corrupted"); - return r & 0xff; - } - - public GZIPInputStream (InputStream istream, int readsize) - throws IOException - { - super (istream, new Inflater (true), readsize); - - // NOTE: header reading code taken from zlib's gzio.c. - - // Read the magic number. - int magic = eof_read () | (eof_read () << 8); - if (magic != GZIP_MAGIC) - throw new ZipException ("gzip header corrupted"); - - int method = eof_read (); - int flags = eof_read (); - // Test from zlib. - if (method != Z_DEFLATED || (flags & RESERVED) != 0) - throw new ZipException ("gzip header corrupted"); - - // Discard time, xflags, OS code. - for (int i = 0; i < 6; ++i) - eof_read (); - - // Skip the extra field. - if ((flags & EXTRA_FIELD) != 0) - { - int len = eof_read () | (eof_read () << 8); - while (len-- != 0) - eof_read (); - } - - if ((flags & ORIG_NAME) != 0) - { - while (true) - { - int c = eof_read (); - if (c == 0) - break; - } - } - - if ((flags & COMMENT) != 0) - { - while (true) - { - int c = eof_read (); - if (c == 0) - break; - } - } - - if ((flags & HEAD_CRC) != 0) - { - // FIXME: consider checking CRC of the header. - eof_read (); - eof_read (); - } - - crc = new CRC32 (); - } - - public int read (byte[] buf, int off, int len) throws IOException - { - if (eos) - return -1; - int r = super.read(buf, off, len); - if (r == -1) - { - eos = true; - int header_crc = read4 (); - if (crc.getValue() != header_crc) - throw new ZipException ("corrupted gzip file"); - // Read final `ISIZE' field. - // FIXME: should we check this length? - read4 (); - return -1; - } - crc.update(buf, off, r); - return r; - } - - private final int read4 () throws IOException - { - int byte0 = in.read(); - int byte1 = in.read(); - int byte2 = in.read(); - int byte3 = in.read(); - if (byte3 < 0) - throw new ZipException (".zip archive ended prematurely"); - return ((byte3 & 0xFF) << 24) + ((byte2 & 0xFF) << 16) - + ((byte1 & 0xFF) << 8) + (byte0 & 0xFF); - } - - // Checksum used by this input stream. - protected CRC32 crc; - - // Indicates whether end-of-stream has been reached. - protected boolean eos; - - // Some constants from zlib. - static final int Z_DEFLATED = 8; - static final int HEAD_CRC = 0x02; - static final int EXTRA_FIELD = 0x04; - static final int ORIG_NAME = 0x08; - static final int COMMENT = 0x10; - static final int RESERVED = 0xe0; -}