/**@class java.io.InputStream
@extends java.io.Closeable

@extends java.lang.Object

 This abstract class is the superclass of all classes representing
 an input stream of bytes.

 <p> Applications that need to define a subclass of <code>InputStream</code>
 must always provide a method that returns the next byte of input.

 @author  Arthur van Hoff
 @see     java.io.BufferedInputStream
 @see     java.io.ByteArrayInputStream
 @see     java.io.DataInputStream
 @see     java.io.FilterInputStream
 @see     java.io.InputStream#read()
 @see     java.io.OutputStream
 @see     java.io.PushbackInputStream
 @since   JDK1.0
*/
var InputStream = {

/**Reads the next byte of data from the input stream. The value byte is
 returned as an <code>int</code> in the range <code>0</code> to
 <code>255</code>. If no byte is available because the end of the stream
 has been reached, the value <code>-1</code> is returned. This method
 blocks until input data is available, the end of the stream is detected,
 or an exception is thrown.

 <p> A subclass must provide an implementation of this method.
@return {Number} the next byte of data, or <code>-1</code> if the end of the
             stream is reached.
@exception IOException  if an I/O error occurs.
*/
read : function(  ) {},

/**Reads some number of bytes from the input stream and stores them into
 the buffer array <code>b</code>. The number of bytes actually read is
 returned as an integer.  This method blocks until input data is
 available, end of file is detected, or an exception is thrown.

 <p> If the length of <code>b</code> is zero, then no bytes are read and
 <code>0</code> is returned; otherwise, there is an attempt to read at
 least one byte. If no byte is available because the stream is at the
 end of the file, the value <code>-1</code> is returned; otherwise, at
 least one byte is read and stored into <code>b</code>.

 <p> The first byte read is stored into element <code>b[0]</code>, the
 next one into <code>b[1]</code>, and so on. The number of bytes read is,
 at most, equal to the length of <code>b</code>. Let <i>k</i> be the
 number of bytes actually read; these bytes will be stored in elements
 <code>b[0]</code> through <code>b[</code><i>k</i><code>-1]</code>,
 leaving elements <code>b[</code><i>k</i><code>]</code> through
 <code>b[b.length-1]</code> unaffected.

 <p> The <code>read(b)</code> method for class <code>InputStream</code>
 has the same effect as: <pre><code> read(b, 0, b.length) </code></pre>
@param {Object {byte[]}} b   the buffer into which the data is read.
@return {Number} the total number of bytes read into the buffer, or
             <code>-1</code> if there is no more data because the end of
             the stream has been reached.
@exception IOException  If the first byte cannot be read for any reason
 other than the end of the file, if the input stream has been closed, or
 if some other I/O error occurs.
@exception NullPointerException  if <code>b</code> is <code>null</code>.
@see java.io.InputStream#read(byte[], int, int)
*/
read : function(  ) {},

/**Reads up to <code>len</code> bytes of data from the input stream into
 an array of bytes.  An attempt is made to read as many as
 <code>len</code> bytes, but a smaller number may be read.
 The number of bytes actually read is returned as an integer.

 <p> This method blocks until input data is available, end of file is
 detected, or an exception is thrown.

 <p> If <code>len</code> is zero, then no bytes are read and
 <code>0</code> is returned; otherwise, there is an attempt to read at
 least one byte. If no byte is available because the stream is at end of
 file, the value <code>-1</code> is returned; otherwise, at least one
 byte is read and stored into <code>b</code>.

 <p> The first byte read is stored into element <code>b[off]</code>, the
 next one into <code>b[off+1]</code>, and so on. The number of bytes read
 is, at most, equal to <code>len</code>. Let <i>k</i> be the number of
 bytes actually read; these bytes will be stored in elements
 <code>b[off]</code> through <code>b[off+</code><i>k</i><code>-1]</code>,
 leaving elements <code>b[off+</code><i>k</i><code>]</code> through
 <code>b[off+len-1]</code> unaffected.

 <p> In every case, elements <code>b[0]</code> through
 <code>b[off]</code> and elements <code>b[off+len]</code> through
 <code>b[b.length-1]</code> are unaffected.

 <p> The <code>read(b,</code> <code>off,</code> <code>len)</code> method
 for class <code>InputStream</code> simply calls the method
 <code>read()</code> repeatedly. If the first such call results in an
 <code>IOException</code>, that exception is returned from the call to
 the <code>read(b,</code> <code>off,</code> <code>len)</code> method.  If
 any subsequent call to <code>read()</code> results in a
 <code>IOException</code>, the exception is caught and treated as if it
 were end of file; the bytes read up to that point are stored into
 <code>b</code> and the number of bytes read before the exception
 occurred is returned. The default implementation of this method blocks
 until the requested amount of input data <code>len</code> has been read,
 end of file is detected, or an exception is thrown. Subclasses are encouraged
 to provide a more efficient implementation of this method.
@param {Object {byte[]}} b     the buffer into which the data is read.
@param {Number} off   the start offset in array <code>b</code>
                   at which the data is written.
@param {Number} len   the maximum number of bytes to read.
@return {Number} the total number of bytes read into the buffer, or
             <code>-1</code> if there is no more data because the end of
             the stream has been reached.
@exception IOException If the first byte cannot be read for any reason
 other than end of file, or if the input stream has been closed, or if
 some other I/O error occurs.
@exception NullPointerException If <code>b</code> is <code>null</code>.
@exception IndexOutOfBoundsException If <code>off</code> is negative,
 <code>len</code> is negative, or <code>len</code> is greater than
 <code>b.length - off</code>
@see java.io.InputStream#read()
*/
read : function(  ) {},

/**Skips over and discards <code>n</code> bytes of data from this input
 stream. The <code>skip</code> method may, for a variety of reasons, end
 up skipping over some smaller number of bytes, possibly <code>0</code>.
 This may result from any of a number of conditions; reaching end of file
 before <code>n</code> bytes have been skipped is only one possibility.
 The actual number of bytes skipped is returned.  If <code>n</code> is
 negative, no bytes are skipped.

 <p> The <code>skip</code> method of this class creates a
 byte array and then repeatedly reads into it until <code>n</code> bytes
 have been read or the end of the stream has been reached. Subclasses are
 encouraged to provide a more efficient implementation of this method.
 For instance, the implementation may depend on the ability to seek.
@param {Number} n   the number of bytes to be skipped.
@return {Number} the actual number of bytes skipped.
@exception IOException  if the stream does not support seek,
                          or if some other I/O error occurs.
*/
skip : function(  ) {},

/**Returns an estimate of the number of bytes that can be read (or
 skipped over) from this input stream without blocking by the next
 invocation of a method for this input stream. The next invocation
 might be the same thread or another thread.  A single read or skip of this
 many bytes will not block, but may read or skip fewer bytes.

 <p> Note that while some implementations of {@code InputStream} will return
 the total number of bytes in the stream, many will not.  It is
 never correct to use the return value of this method to allocate
 a buffer intended to hold all data in this stream.

 <p> A subclass' implementation of this method may choose to throw an
 {@link java.io.IOException} if this input stream has been closed by
 invoking the {@link #close}() method.

 <p> The {@code available} method for class {@code InputStream} always
 returns {@code 0}.

 <p> This method should be overridden by subclasses.
@return {Number} an estimate of the number of bytes that can be read (or skipped
             over) from this input stream without blocking or {@code 0} when
             it reaches the end of the input stream.
@exception IOException if an I/O error occurs.
*/
available : function(  ) {},

/**Closes this input stream and releases any system resources associated
 with the stream.

 <p> The <code>close</code> method of <code>InputStream</code> does
 nothing.
@exception IOException  if an I/O error occurs.
*/
close : function(  ) {},

/**Marks the current position in this input stream. A subsequent call to
 the <code>reset</code> method repositions this stream at the last marked
 position so that subsequent reads re-read the same bytes.

 <p> The <code>readlimit</code> arguments tells this input stream to
 allow that many bytes to be read before the mark position gets
 invalidated.

 <p> The general contract of <code>mark</code> is that, if the method
 <code>markSupported</code> returns <code>true</code>, the stream somehow
 remembers all the bytes read after the call to <code>mark</code> and
 stands ready to supply those same bytes again if and whenever the method
 <code>reset</code> is called.  However, the stream is not required to
 remember any data at all if more than <code>readlimit</code> bytes are
 read from the stream before <code>reset</code> is called.

 <p> Marking a closed stream should not have any effect on the stream.

 <p> The <code>mark</code> method of <code>InputStream</code> does
 nothing.
@param {Number} readlimit   the maximum limit of bytes that can be read before
                      the mark position becomes invalid.
@see java.io.InputStream#reset()
*/
mark : function(  ) {},

/**Repositions this stream to the position at the time the
 <code>mark</code> method was last called on this input stream.

 <p> The general contract of <code>reset</code> is:

 <p><ul>

 <li> If the method <code>markSupported</code> returns
 <code>true</code>, then:

     <ul><li> If the method <code>mark</code> has not been called since
     the stream was created, or the number of bytes read from the stream
     since <code>mark</code> was last called is larger than the argument
     to <code>mark</code> at that last call, then an
     <code>IOException</code> might be thrown.

     <li> If such an <code>IOException</code> is not thrown, then the
     stream is reset to a state such that all the bytes read since the
     most recent call to <code>mark</code> (or since the start of the
     file, if <code>mark</code> has not been called) will be resupplied
     to subsequent callers of the <code>read</code> method, followed by
     any bytes that otherwise would have been the next input data as of
     the time of the call to <code>reset</code>. </ul>

 <li> If the method <code>markSupported</code> returns
 <code>false</code>, then:

     <ul><li> The call to <code>reset</code> may throw an
     <code>IOException</code>.

     <li> If an <code>IOException</code> is not thrown, then the stream
     is reset to a fixed state that depends on the particular type of the
     input stream and how it was created. The bytes that will be supplied
     to subsequent callers of the <code>read</code> method depend on the
     particular type of the input stream. </ul></ul>

 <p>The method <code>reset</code> for class <code>InputStream</code>
 does nothing except throw an <code>IOException</code>.
@exception IOException  if this stream has not been marked or if the
               mark has been invalidated.
@see java.io.InputStream#mark(int)
@see java.io.IOException
*/
reset : function(  ) {},

/**Tests if this input stream supports the <code>mark</code> and
 <code>reset</code> methods. Whether or not <code>mark</code> and
 <code>reset</code> are supported is an invariant property of a
 particular input stream instance. The <code>markSupported</code> method
 of <code>InputStream</code> returns <code>false</code>.
@return {Boolean} <code>true</code> if this stream instance supports the mark
          and reset methods; <code>false</code> otherwise.
@see java.io.InputStream#mark(int)
@see java.io.InputStream#reset()
*/
markSupported : function(  ) {},


};