mirror of git://gcc.gnu.org/git/gcc.git
94 lines
2.1 KiB
Java
94 lines
2.1 KiB
Java
/* Copyright (C) 1998, 1999, 2001 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.io;
|
|
|
|
/**
|
|
* @author Warren Levy <warrenl@cygnus.com>
|
|
* @date October 28, 1998.
|
|
*/
|
|
/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
|
|
* "The Java Language Specification", ISBN 0-201-63451-1
|
|
* plus online API docs for JDK 1.2 beta from http://www.javasoft.com.
|
|
* Status: Believed complete and correct.
|
|
*/
|
|
|
|
public class FileInputStream extends InputStream
|
|
{
|
|
/* Contains the file descriptor for referencing the actual file. */
|
|
private FileDescriptor fd;
|
|
|
|
public FileInputStream(String name) throws FileNotFoundException
|
|
{
|
|
SecurityManager s = System.getSecurityManager();
|
|
if (s != null)
|
|
s.checkRead(name);
|
|
fd = new FileDescriptor(name, FileDescriptor.READ);
|
|
}
|
|
|
|
public FileInputStream(File file) throws FileNotFoundException
|
|
{
|
|
this(file.getPath());
|
|
}
|
|
|
|
public FileInputStream(FileDescriptor fdObj)
|
|
{
|
|
SecurityManager s = System.getSecurityManager();
|
|
if (s != null)
|
|
s.checkRead(fdObj);
|
|
fd = fdObj;
|
|
}
|
|
|
|
public int available() throws IOException
|
|
{
|
|
return fd.available();
|
|
}
|
|
|
|
public void close() throws IOException
|
|
{
|
|
if (fd.valid())
|
|
fd.close();
|
|
}
|
|
|
|
protected void finalize() throws IOException
|
|
{
|
|
if (fd != null)
|
|
fd.finalize();
|
|
}
|
|
|
|
public final FileDescriptor getFD() throws IOException
|
|
{
|
|
if (!fd.valid())
|
|
throw new IOException();
|
|
return fd;
|
|
}
|
|
|
|
public int read() throws IOException
|
|
{
|
|
return fd.read();
|
|
}
|
|
|
|
public int read(byte[] b) throws IOException
|
|
{
|
|
return fd.read(b, 0, b.length);
|
|
}
|
|
|
|
public int read(byte[] b, int off, int len) throws IOException
|
|
{
|
|
if (off < 0 || len < 0 || off + len > b.length)
|
|
throw new ArrayIndexOutOfBoundsException();
|
|
|
|
return fd.read(b, off, len);
|
|
}
|
|
|
|
public long skip(long n) throws IOException
|
|
{
|
|
return n <= 0 ? 0 : fd.seek(n, FileDescriptor.CUR, true);
|
|
}
|
|
}
|