/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * 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
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * 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
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998-1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsISupports.idl"

interface nsIInputStream;

/**
 * nsIScriptableInputStream provides scriptable access to an nsIInputStream
 * instance.
 */
[scriptable, uuid(e546afd6-1248-4deb-8940-4b000b618a58)]
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); 

    /**
     * Read data from the stream, including NULL bytes.
     *
     * @param aCount the maximum number of bytes to read.
     *
     * @return the data from the stream, which will be an empty string if EOF
     *         has been reached.
     *
     * @throws NS_BASE_STREAM_WOULD_BLOCK if reading from the input stream
     *         would block the calling thread (non-blocking mode only).
     * @throws NS_ERROR_FAILURE if there are not enough bytes available to read
     *         aCount amount of data.
     */
    ACString readBytes(in unsigned long aCount);
};
