gecko-dev/xpcom/io/nsIBufferOutputStream.idl

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * The contents of this file are subject to the Netscape Public License
 * Version 1.0 (the "NPL"); you may not use this file except in
 * compliance with the NPL.  You may obtain a copy of the NPL at
 * http://www.mozilla.org/NPL/
 *
 * Software distributed under the NPL is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
 * for the specific language governing rights and limitations under the
 * NPL.
 *
 * The Initial Developer of this code under the NPL is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
 * Reserved.
 */

#include "nsIOutputStream.idl"

interface nsIBuffer;

[scriptable, uuid(d2aaae66-1ab0-11d3-8ccd-0060b0fc14a3)]
interface nsIBufferOutputStream : nsIOutputStream
{
    /**
     * Returns the buffer underlying this output stream.
     */
    readonly attribute nsIBuffer Buffer;

    /**
     * Writes data into the stream from an input stream.
     * Implementer's note: This method is defined by this interface in order
     * to allow the output stream to efficiently copy the data from the input
     * stream into its internal buffer (if any). If this method was provide
     * as an external facility, a separate char* buffer would need to be used
     * in order to call the output stream's other Write method.
     * @param fromStream the stream from which the data is read
     * @param count the maximun number of bytes to write
     * @return aWriteCount out parameter to hold the number of
     *         bytes written. if an error occurs, the writecount
     *         is undefined
     */
    unsigned long WriteFrom(in nsIInputStream inStr,
                            in unsigned long count);

};