Initial revision

From-SVN: r26263

libjava/java/io/FileInputStream.java

@@ -0,0 +1,96 @@
+/* Copyright (C) 1998, 1999  Cygnus Solutions
+
+   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, IOException
+  {
+    SecurityManager s = System.getSecurityManager();
+    if (s != null)
+      s.checkRead(name);
+    fd = new FileDescriptor(name, FileDescriptor.READ);
+  }
+
+  public FileInputStream(File file) throws FileNotFoundException, IOException
+  {
+    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 == null)
+      return;
+
+    fd.close();
+    fd = null;
+  }
+
+  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 fd.seek(n, FileDescriptor.CUR);
+  }
+}