/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** 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.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):
 *   mcmullen@netscape.com (original author)
 *   scc@mozilla.org
 *   davidm@netscape.com
 *   darin@netscape.com
 *
 * 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 ***** */

/**
 * Based on original code from nsIStringStream.h
 */

#include "nsIInputStream.idl"

/**
 * nsIStringInputStream
 *
 * Provides scriptable and specialized C++ only methods for initializing a
 * nsIInputStream implementation with a simple character array.
 */
[scriptable, uuid(450cd2d4-f0fd-424d-b365-b1251f80fd53)]
interface nsIStringInputStream : nsIInputStream
{
    /**
     * SetData - assign data to the input stream (copied on assignment).
     *
     * @param data    - stream data
     * @param dataLen - stream data length (-1 if length should be computed)
     *
     * NOTE: C++ code should consider using AdoptData or ShareData to avoid
     * making an extra copy of the stream data.
     */
    void setData(in string data, in long dataLen);

    /**
     * NOTE: the following methods are designed to give C++ code added control
     * over the ownership and lifetime of the stream data.  Use with care :-)
     */

    /**
     * AdoptData - assign data to the input stream.  the input stream takes
     * ownership of the given data buffer and will nsMemory::Free it when
     * the input stream is destroyed.
     *
     * @param data      - stream data
     * @param dataLen   - stream data length (-1 if length should be computed)
     */
    [noscript] void adoptData(in charPtr data, in long dataLen);

    /**
     * ShareData - assign data to the input stream.  the input stream references
     * the given data buffer until the input stream is destroyed.  the given
     * data buffer must outlive the input stream.
     *
     * @param data      - stream data
     * @param dataLen   - stream data length (-1 if length should be computed)
     */
    [noscript] void shareData(in string data, in long dataLen);
};

%{C++

//-----------------------------------------------------------------------------
// C++ factory methods
//-----------------------------------------------------------------------------

#include "nsIInputStream.h"
#include "nsStringGlue.h"

//-----------------------------------------------------------------------------
// Factory method to get an nsInputStream from an nsAString.  Result will
// implement nsIStringInputStream and nsISeekableStream
extern "C" NS_COM nsresult
NS_NewStringInputStream(nsIInputStream** aStreamResult,
                        const nsAString& aStringToRead);

//-----------------------------------------------------------------------------
// Factory method to get an nsInputStream from an nsACString.  Result will
// implement nsIStringInputStream and nsISeekableStream 
extern "C" NS_COM nsresult
NS_NewCStringInputStream(nsIInputStream** aStreamResult,
                         const nsACString& aStringToRead);

//-----------------------------------------------------------------------------
// Factory method to get an nsInputStream from a string.  Result will
// implement nsIStringInputStream and nsISeekableStream
extern "C" NS_COM nsresult
NS_NewCharInputStream(nsIInputStream** aStreamResult,
                      const char* aStringToRead);

//-----------------------------------------------------------------------------
// Factory method to get an nsInputStream from a byte buffer.  Result will
// implement nsIStringInputStream and nsISeekableStream
extern "C" NS_COM nsresult
NS_NewByteInputStream(nsIInputStream** aStreamResult,
                      const char* aStringToRead,
                      PRInt32 aLength);
%}