nsMultiplexInputStream.cpp revision 677833bc953b6cb418c701facbdcf4aa18d6c44e
/* -*- Mode: C++; 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
*
* 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 frightening to behold.
*
* The Initial Developer of the Original Code is
* Jonas Sicking.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Jonas Sicking <sicking@bigfoot.com>
*
* 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 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 ***** */
/**
* The multiplex stream concatenates a list of input streams into a single
* stream.
*/
#include "nsMultiplexInputStream.h"
#include "nsIMultiplexInputStream.h"
#include "nsISeekableStream.h"
#include "nsSupportsArray.h"
#include "nsInt64.h"
class nsMultiplexInputStream : public nsIMultiplexInputStream,
public nsISeekableStream
{
public:
private:
~nsMultiplexInputStream() {}
struct ReadSegmentsState {
void* mClosure;
};
};
: mCurrentStream(0),
{
}
/* readonly attribute unsigned long count; */
{
return NS_OK;
}
/* void appendStream (in nsIInputStream stream); */
{
}
/* void insertStream (in nsIInputStream stream, in unsigned long index); */
{
if (mCurrentStream > aIndex ||
return rv;
}
/* void removeStream (in unsigned long index); */
{
if (mCurrentStream > aIndex)
else if (mCurrentStream == aIndex)
return rv;
}
/* nsIInputStream getStream (in unsigned long index); */
{
(void**)_retval);
}
/* void close (); */
{
for (i = 0; i < len; ++i) {
// We still want to close all streams, but we should return an error
}
return rv;
}
/* unsigned long available (); */
{
for (i = mCurrentStream; i < len; i++) {
avail += streamAvail;
}
return NS_OK;
}
/* [noscript] unsigned long read (in charPtr buf, in unsigned long count); */
{
*_retval = 0;
// XXX some streams return NS_BASE_STREAM_CLOSED to indicate EOF.
if (rv == NS_BASE_STREAM_CLOSED) {
read = 0;
}
break;
if (read == 0) {
}
else {
}
}
}
/* [noscript] unsigned long readSegments (in nsWriteSegmentFun writer,
* in voidPtr closure,
* in unsigned long count); */
{
state.mThisStream = this;
// XXX some streams return NS_BASE_STREAM_CLOSED to indicate EOF.
if (rv == NS_BASE_STREAM_CLOSED) {
read = 0;
}
// if |aWriter| decided to stop reading segments...
break;
// if stream is empty, then advance to the next stream.
if (read == 0) {
}
else {
}
}
// if we successfully read some data, then this call succeeded.
}
const char* aFromRawSegment,
{
return rv;
}
/* readonly attribute boolean nonBlocking; */
{
for (i = 0; i < len; ++i) {
// If one is non-blocking the entire stream becomes non-blocking
if (*aNonBlocking)
return NS_OK;
}
return NS_OK;
}
/* void seek (in PRInt32 whence, in PRInt32 offset); */
{
// rewinding to start is easy, and should be the most common case
{
for (i = 0; i < last; ++i) {
}
mCurrentStream = 0;
return NS_OK;
}
// other Seeks not implemented yet
return NS_ERROR_NOT_IMPLEMENTED;
}
/* PRUint32 tell (); */
{
for (i = 0; i < last; ++i) {
}
return NS_OK;
}
/* void setEOF (); */
{
return NS_ERROR_NOT_IMPLEMENTED;
}
void **result)
{
if (outer)
return NS_ERROR_NO_AGGREGATION;
if (!inst)
return NS_ERROR_OUT_OF_MEMORY;
return rv;
}