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Diffstat (limited to 'libjava/gnu/java/net/protocol/ftp/CompressedInputStream.java')
| -rw-r--r-- | libjava/gnu/java/net/protocol/ftp/CompressedInputStream.java | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/libjava/gnu/java/net/protocol/ftp/CompressedInputStream.java b/libjava/gnu/java/net/protocol/ftp/CompressedInputStream.java deleted file mode 100644 index f2e65b7d37e..00000000000 --- a/libjava/gnu/java/net/protocol/ftp/CompressedInputStream.java +++ /dev/null @@ -1,215 +0,0 @@ -/* CompressedInputStream.java -- - Copyright (C) 2003, 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 gnu.java.net.protocol.ftp; - -import java.io.IOException; -import java.io.InputStream; -import java.net.ProtocolException; - -/** - * A DTP input stream that implements the FTP compressed transfer mode. - * - * @author Chris Burdess (dog@gnu.org) - */ -class CompressedInputStream - extends DTPInputStream -{ - - static final int EOF = 64; - - static final int RAW = 0x00; - static final int COMPRESSED = 0x80; - static final int FILLER = 0xc0; - - int descriptor; - int max = -1; - int count = -1; - - int state = RAW; // RAW | STATE | FILLER - int rep; // the compressed byte - int n = 0; // the number of compressed or raw bytes - - CompressedInputStream(DTP dtp, InputStream in) - { - super(dtp, in); - } - - public int read() - throws IOException - { - if (transferComplete) - { - return -1; - } - if (count == -1) - { - readHeader(); - } - if (max < 1) - { - close(); - return -1; - } - if (n > 0 && (state == COMPRESSED || state == FILLER)) - { - n--; - return rep; - } - int c = in.read(); - if (c == -1) - { - close(); - } - count++; - if (count >= max) - { - count = -1; - if (descriptor == EOF) - { - close(); - } - } - if (c == -1) - { - return c; - } - while (n == 0) // read code header - { - state = (c & 0xc0); - n = (c & 0x3f); - c = in.read(); - if (c == -1) - { - return -1; - } - } - switch (state) - { - case RAW: - break; - case COMPRESSED: - case FILLER: - rep = c; - break; - default: - throw new ProtocolException("Illegal state: " + state); - } - n--; - return c; - } - - public int read(byte[] buf) - throws IOException - { - return read(buf, 0, buf.length); - } - - public int read(byte[] buf, int off, int len) - throws IOException - { - if (transferComplete) - { - return -1; - } - if (count == -1) - { - readHeader(); - } - if (max < 1) - { - close(); - return -1; - } - // TODO improve performance - for (int i = off; i < len; i++) - { - int c = read(); - if (c == -1) - { - close(); - return i; - } - buf[i] = (byte) c; - } - return len; - /* - int l = in.read (buf, off, len); - if (l==-1) - { - close (); - } - count += l; - if (count>=max) - { - count = -1; - if (descriptor==EOF) - { - close (); - } - } - return l; - */ - } - - /** - * Reads the block header. - */ - void readHeader() - throws IOException - { - descriptor = in.read(); - int max_hi = in.read(); - int max_lo = in.read(); - max = (max_hi << 8) | max_lo; - count = 0; - } - - /** - * Reads the code header. - */ - void readCodeHeader() - throws IOException - { - int code = in.read(); - state = (code & 0xc0); - n = (code & 0x3f); - } - -} - |
