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Diffstat (limited to 'libjava/java/util/zip/GZIPInputStream.java')
-rw-r--r--libjava/java/util/zip/GZIPInputStream.java154
1 files changed, 0 insertions, 154 deletions
diff --git a/libjava/java/util/zip/GZIPInputStream.java b/libjava/java/util/zip/GZIPInputStream.java
deleted file mode 100644
index bea5eb38b1d..00000000000
--- a/libjava/java/util/zip/GZIPInputStream.java
+++ /dev/null
@@ -1,154 +0,0 @@
-// GZIPInputStream.java - Input tiler for reading gzip file.
-
-/* Copyright (C) 1999 Free Software Foundation
-
- This file is part of libgcj.
-
-This software is copyrighted work licensed under the terms of the
-Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
-details. */
-
-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;
-}