gecko-dev/xpcom/io/nsIBufferInputStream.idl

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/* -*- 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 1.1 (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 Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#include "nsIInputStream.idl"
interface nsIBuffer;
%{C++
/**
* The signature of the writer function passed to ReadSegments. This
* specifies where the data should go that gets read from the buffer.
* Implementers should return the following:
* @return NS_OK and writeCount - if successfully wrote something
* @return NS_BASE_STREAM_CLOSED - if no more can be written
* @return NS_BASE_STREAM_WOULD_BLOCK - if there is currently space to write (in
* a non-blocking mode)
* @return <other-error> - on failure
*/
typedef NS_CALLBACK(nsWriteSegmentFun)(void* closure,
const char* fromRawSegment,
PRUint32 toOffset,
PRUint32 count,
PRUint32 *writeCount);
%}
// native nsWriteSegmentFun(nsWriteSegmentFun);
[scriptable, uuid(93e9a230-1955-11d3-933b-000064657374)]
interface nsIBufferInputStream : nsIInputStream
{
/**
* Returns the buffer underlying this input stream.
*/
readonly attribute nsIBuffer Buffer;
[noscript] unsigned long ReadSegments(in nsWriteSegmentFun writer,
in voidPtr closure,
in unsigned long count);
/**
* 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);
/**
* Set this attribute to put the stream in non-blocking mode.
*/
attribute boolean NonBlocking;
};