+++ /dev/null
-/* ZipInputStream.java - Input filter for reading zip 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.*;
-
-/**
- * @author Per Bothner
- * @date May 1999.
- */
-
-/*
- * Written using on-line Java Platform 1.2 API Specification, as well
- * as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998).
- * Status: Quite incomplete, but can read uncompressed .zip archives.
- */
-
-// We do not calculate the CRC and compare it with the specified value;
-// we probably should. FIXME.
-
-
-public class ZipInputStream extends InflaterInputStream implements ZipConstants
-{
- public ZipInputStream (InputStream in)
- {
- super (in, new Inflater (true));
- }
-
- public ZipEntry getNextEntry () throws IOException
- {
- if (closed)
- throw new IOException ("stream closed");
- if (current != null)
- closeEntry();
- if (in.read() != 'P'
- || in.read() != 'K')
- return null;
- int code = in.read();
- while (code == '\001')
- {
- code = in.read();
- if (code != '\002')
- return null;
- in.skip(16);
- int size = read4();
- in.skip(4);
- int fname_length = readu2();
- int extra_length = readu2();
- int fcomment_length = readu2();
- // `12' is the number of bytes between the comment length
- // field and the end of the fixed part of the header:
- // 2 bytes for `disk number start'
- // 2 bytes for `internal file attributes'
- // 4 bytes for `external file attributes'
- // 4 bytes for `relative offset of local header'
- in.skip(12 + fname_length + extra_length + fcomment_length);
- if (in.read() != 'P' || in.read() != 'K')
- return null;
- code = in.read();
- }
- if (code == '\005')
- {
- if (in.read() != '\006')
- return null;
- in.skip(16);
- int comment_size = readu2();
- in.skip(comment_size);
- if (in.read() != 'P' || in.read() != 'K')
- return null;
- code = in.read();
- }
- if (code != '\003'
- || in.read() != '\004')
- return null;
- int ex_version = readu2();
- current_flags = readu2();
- int method = readu2();
- int modtime = readu2();
- int moddate = readu2();
- int crc = read4();
- int compressedSize = read4();
- int uncompressedSize = read4();
- int filenameLength = readu2();
- int extraLength = readu2();
- byte[] bname = new byte[filenameLength];
- readFully(bname);
- ZipEntry entry = createZipEntry(new String(bname, "8859_1"));
- if (extraLength > 0)
- {
- byte[] bextra = new byte[extraLength];
- readFully(bextra);
- entry.extra = bextra;
- }
- entry.compressedSize = compressedSize;
- entry.size = uncompressedSize;
- entry.crc = (long) crc & 0xffffffffL;
- entry.method = method;
- entry.time = ZipEntry.timeFromDOS(moddate, modtime);
- current = entry;
- avail = uncompressedSize;
- compressed_bytes = compressedSize;
- return entry;
- }
-
- // We override fill to let us control how much data gets read from
- // the underlying input stream. This lets us avoid having to push
- // back data.
- protected void fill () throws IOException
- {
- if (closed)
- throw new IOException ("stream closed");
- int count = buf.length;
- if (count > compressed_bytes)
- count = compressed_bytes;
- len = in.read(buf, 0, count);
- if (len != -1)
- {
- compressed_bytes -= len;
- inf.setInput(buf, 0, len);
- }
- }
-
- /**
- * Creates a new ZipEntry with the given name.
- * Used by ZipInputStream when normally <code>new ZipEntry (name)</code>
- * would be called. This gives subclasses such as JarInputStream a change
- * to override this method and add aditional information to the ZipEntry
- * (subclass).
- */
- protected ZipEntry createZipEntry (String name)
- {
- return new ZipEntry (name);
- }
-
- public int read (byte[] b, int off, int len) throws IOException
- {
- if (closed)
- throw new IOException ("stream closed");
- if (len > avail)
- len = avail;
- int count;
- if (current.method == Deflater.DEFLATED)
- count = super.read(b, off, len);
- else
- count = in.read(b, off, len);
- if (count == -1 || avail == 0)
- {
- inf.reset();
- count = -1;
- }
- else
- avail -= count;
- return count;
- }
-
- public long skip (long n) throws IOException
- {
- if (closed)
- throw new IOException ("stream closed");
- if (n > avail)
- n = avail;
- long count;
- if (current.method == Deflater.DEFLATED)
- count = super.skip(n);
- else
- count = in.skip(n);
- avail = avail - (int) count;
- return count;
- }
-
- /**
- * Returns 0 if the ZipInputStream is closed and 1 otherwise.
- *
- * @since 1.2
- */
- public int available()
- {
- return closed ? 0 : 1;
- }
-
- private void readFully (byte[] b) throws IOException
- {
- int off = 0;
- int len = b.length;
- while (len > 0)
- {
- int count = in.read(b, off, len);
- if (count <= 0)
- throw new EOFException(".zip archive ended prematurely");
- off += count;
- len -= count;
- }
- }
-
- private int readu2 () throws IOException
- {
- int byte0 = in.read();
- int byte1 = in.read();
- if (byte0 < 0 || byte1 < 0)
- throw new EOFException(".zip archive ended prematurely");
- return ((byte1 & 0xFF) << 8) | (byte0 & 0xFF);
- }
-
- private 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 EOFException(".zip archive ended prematurely");
- return ((byte3 & 0xFF) << 24) + ((byte2 & 0xFF) << 16)
- + ((byte1 & 0xFF) << 8) + (byte0 & 0xFF);
- }
-
- public void closeEntry () throws IOException
- {
- if (current != null)
- {
- if (avail > 0)
- skip (avail);
- if ((current_flags & 8) != 0)
- {
- int sig = read4();
- if (sig != 0x04034b50)
- throw new ZipException("bad/missing magic number at end of .zip entry");
- int crc = read4();
- int compressedSize = read4();
- int uncompressedSize = read4();
- if (current.compressedSize != compressedSize
- || current.size != uncompressedSize
- || current.crc != crc)
- throw new ZipException("bad data descriptor at end of .zip entry");
- }
- current = null;
- avail = 0;
- }
- }
-
- /**
- * Closes this InflaterInputStream.
- *
- * @since 1.2
- */
- public void close () throws IOException
- {
- current = null;
- closed = true;
- super.close();
- }
-
- private ZipEntry current;
- private int current_flags;
- // Number of uncompressed bytes to be read.
- private int avail;
- // Number of bytes we can read from underlying stream.
- private int compressed_bytes;
- // Is this ZipInputStream closed? Set by the close() method.
- private boolean closed = false;
-}
projects / msp430-gcc.git / blobdiff