win/idl/nsIScriptableInputStream.idl

/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
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 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Communicator client code, released
 * March 31, 1998.
 *
 * The Initial Developer of the Original Code is
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 * Portions created by the Initial Developer are Copyright (C) 1998-1999
 * the Initial Developer. All Rights Reserved.
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 *
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 * either of the GNU General Public License Version 2 or later (the "GPL"),
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#include "nsISupports.idl"

interface nsIInputStream;

/**
 * nsIScriptableInputStream provides scriptable access to an nsIInputStream
 * instance.
 *
 * @status FROZEN
 */
[scriptable, uuid(a2a32f90-9b90-11d3-a189-0050041caf44)] 
interface nsIScriptableInputStream : nsISupports
{ 
    /** 
     * Closes the stream. 
     */
    void close();

    /**
     * Wrap the given nsIInputStream with this nsIScriptableInputStream. 
     *
     * @param aInputStream parameter providing the stream to wrap 
     */ 
    void init(in nsIInputStream aInputStream); 

    /**
     * Return the number of bytes currently available in the stream 
     *
     * @return the number of bytes 
     *
     * @throws NS_BASE_STREAM_CLOSED if called after the stream has been closed
     */ 
    unsigned long available(); 

    /**
     * Read data from the stream.
     *
     * WARNING: If the data contains a null byte, then this method will return
     * a truncated string.
     *
     * @param aCount the maximum number of bytes to read 
     *
     * @return the data, which will be an empty string if the stream is at EOF.
     *
     * @throws NS_BASE_STREAM_CLOSED if called after the stream has been closed
     * @throws NS_ERROR_NOT_INITIALIZED if init was not called
     */ 
    string read(in unsigned long aCount); 
};