97 lines
2.1 KiB
Java
97 lines
2.1 KiB
Java
/* Copyright (C) 1998, 1999 Cygnus Solutions
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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package java.io;
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/**
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* @author Warren Levy <warrenl@cygnus.com>
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* @date October 28, 1998.
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*/
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/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
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* "The Java Language Specification", ISBN 0-201-63451-1
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* plus online API docs for JDK 1.2 beta from http://www.javasoft.com.
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* Status: Believed complete and correct.
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*/
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public class FileInputStream extends InputStream
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{
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/* Contains the file descriptor for referencing the actual file. */
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private FileDescriptor fd;
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public FileInputStream(String name) throws FileNotFoundException, IOException
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{
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SecurityManager s = System.getSecurityManager();
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if (s != null)
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s.checkRead(name);
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fd = new FileDescriptor(name, FileDescriptor.READ);
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}
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public FileInputStream(File file) throws FileNotFoundException, IOException
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{
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this(file.getPath());
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}
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public FileInputStream(FileDescriptor fdObj)
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{
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SecurityManager s = System.getSecurityManager();
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if (s != null)
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s.checkRead(fdObj);
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fd = fdObj;
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}
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public int available() throws IOException
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{
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return fd.available();
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}
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public void close() throws IOException
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{
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if (fd == null)
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return;
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fd.close();
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fd = null;
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}
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protected void finalize() throws IOException
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{
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if (fd != null)
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fd.finalize();
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}
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public final FileDescriptor getFD() throws IOException
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{
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if (!fd.valid())
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throw new IOException();
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return fd;
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}
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public int read() throws IOException
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{
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return fd.read();
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}
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public int read(byte[] b) throws IOException
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{
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return fd.read(b, 0, b.length);
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}
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public int read(byte[] b, int off, int len) throws IOException
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{
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if (off < 0 || len < 0 || off + len > b.length)
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throw new ArrayIndexOutOfBoundsException();
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return fd.read(b, off, len);
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}
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public long skip(long n) throws IOException
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{
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return fd.seek(n, FileDescriptor.CUR);
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}
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}
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