/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Netscape 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/NPL/
 *
 * 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.org code.
 *
 * The Initial Developer of the Original Code is 
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either 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 NPL, 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 NPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsISupports.idl"

interface nsIPipe;
interface nsIMemory;
interface nsIInputStream;
interface nsIOutputStream;

[scriptable, uuid(f4211abc-61b3-11d4-9877-00c04fa0cf4a)]
interface nsIPipe : nsISupports
{
    /**
     * initialize this pipe
     */
    void initialize(in unsigned long segmentSize,
                    in unsigned long maxSize,
                    in boolean nonBlockingInput,
                    in boolean nonBlockingOutput,
                    in nsIMemory segmentAllocator);

    /**
     * supports nsIObservableInputStream and nsISearchableInputStream
     */
    readonly attribute nsIInputStream inputStream;

    /**
     * supports nsIObservableOutputStream
     */
    readonly attribute nsIOutputStream outputStream;
};

[scriptable, uuid(8C39EF62-F7C9-11d4-98F5-001083010E9B)] 
interface nsISearchableInputStream : nsISupports
{
    /**
     * Searches for a string in the input stream. Since the stream has a notion
     * of EOF, it is possible that the string may at some time be in the 
     * buffer, but is is not currently found up to some offset. Consequently,
     * both the found and not found cases return an offset:
     *    if found, return offset where it was found
     *    if not found, return offset of the first byte not searched
     * In the case the stream is at EOF and the string is not found, the first
     * byte not searched will correspond to the length of the buffer.
     */
    void search(in string forString, 
                in boolean ignoreCase, 
                out boolean found,
                out unsigned long offsetSearchedTo);
};

%{C++
#define NS_PIPE_DEFAULT_SEGMENT_SIZE    4096
#define NS_PIPE_DEFAULT_BUFFER_SIZE     (1024*1024)

extern NS_COM nsresult
NS_NewPipe(nsIInputStream* *inStrResult,
           nsIOutputStream* *outStrResult,
           PRUint32 segmentSize = NS_PIPE_DEFAULT_SEGMENT_SIZE,
           PRUint32 maxSize = NS_PIPE_DEFAULT_BUFFER_SIZE,
           PRBool nonBlockingInput = PR_FALSE,
           PRBool nonBlockingOutput = PR_FALSE,
           nsIMemory* segmentAllocator = nsnull);
%}