зеркало из https://github.com/mozilla/pjs.git
790 строки
24 KiB
C++
790 строки
24 KiB
C++
/* vim:set ts=4 sw=4 sts=4 et cin: */
|
|
/* ***** 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.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 2002
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Darin Fisher <darin@netscape.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 ***** */
|
|
|
|
#include "mozilla/Mutex.h"
|
|
#include "nsStreamUtils.h"
|
|
#include "nsCOMPtr.h"
|
|
#include "nsIPipe.h"
|
|
#include "nsIEventTarget.h"
|
|
#include "nsIRunnable.h"
|
|
#include "nsISafeOutputStream.h"
|
|
#include "nsString.h"
|
|
|
|
using namespace mozilla;
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
class nsInputStreamReadyEvent : public nsIRunnable
|
|
, public nsIInputStreamCallback
|
|
{
|
|
public:
|
|
NS_DECL_ISUPPORTS
|
|
|
|
nsInputStreamReadyEvent(nsIInputStreamCallback *callback,
|
|
nsIEventTarget *target)
|
|
: mCallback(callback)
|
|
, mTarget(target)
|
|
{
|
|
}
|
|
|
|
private:
|
|
~nsInputStreamReadyEvent()
|
|
{
|
|
if (!mCallback)
|
|
return;
|
|
//
|
|
// whoa!! looks like we never posted this event. take care to
|
|
// release mCallback on the correct thread. if mTarget lives on the
|
|
// calling thread, then we are ok. otherwise, we have to try to
|
|
// proxy the Release over the right thread. if that thread is dead,
|
|
// then there's nothing we can do... better to leak than crash.
|
|
//
|
|
bool val;
|
|
nsresult rv = mTarget->IsOnCurrentThread(&val);
|
|
if (NS_FAILED(rv) || !val) {
|
|
nsCOMPtr<nsIInputStreamCallback> event;
|
|
NS_NewInputStreamReadyEvent(getter_AddRefs(event), mCallback,
|
|
mTarget);
|
|
mCallback = 0;
|
|
if (event) {
|
|
rv = event->OnInputStreamReady(nsnull);
|
|
if (NS_FAILED(rv)) {
|
|
NS_NOTREACHED("leaking stream event");
|
|
nsISupports *sup = event;
|
|
NS_ADDREF(sup);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
public:
|
|
NS_IMETHOD OnInputStreamReady(nsIAsyncInputStream *stream)
|
|
{
|
|
mStream = stream;
|
|
|
|
nsresult rv =
|
|
mTarget->Dispatch(this, NS_DISPATCH_NORMAL);
|
|
if (NS_FAILED(rv)) {
|
|
NS_WARNING("Dispatch failed");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHOD Run()
|
|
{
|
|
if (mCallback) {
|
|
if (mStream)
|
|
mCallback->OnInputStreamReady(mStream);
|
|
mCallback = nsnull;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
private:
|
|
nsCOMPtr<nsIAsyncInputStream> mStream;
|
|
nsCOMPtr<nsIInputStreamCallback> mCallback;
|
|
nsCOMPtr<nsIEventTarget> mTarget;
|
|
};
|
|
|
|
NS_IMPL_THREADSAFE_ISUPPORTS2(nsInputStreamReadyEvent, nsIRunnable,
|
|
nsIInputStreamCallback)
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
class nsOutputStreamReadyEvent : public nsIRunnable
|
|
, public nsIOutputStreamCallback
|
|
{
|
|
public:
|
|
NS_DECL_ISUPPORTS
|
|
|
|
nsOutputStreamReadyEvent(nsIOutputStreamCallback *callback,
|
|
nsIEventTarget *target)
|
|
: mCallback(callback)
|
|
, mTarget(target)
|
|
{
|
|
}
|
|
|
|
private:
|
|
~nsOutputStreamReadyEvent()
|
|
{
|
|
if (!mCallback)
|
|
return;
|
|
//
|
|
// whoa!! looks like we never posted this event. take care to
|
|
// release mCallback on the correct thread. if mTarget lives on the
|
|
// calling thread, then we are ok. otherwise, we have to try to
|
|
// proxy the Release over the right thread. if that thread is dead,
|
|
// then there's nothing we can do... better to leak than crash.
|
|
//
|
|
bool val;
|
|
nsresult rv = mTarget->IsOnCurrentThread(&val);
|
|
if (NS_FAILED(rv) || !val) {
|
|
nsCOMPtr<nsIOutputStreamCallback> event;
|
|
NS_NewOutputStreamReadyEvent(getter_AddRefs(event), mCallback,
|
|
mTarget);
|
|
mCallback = 0;
|
|
if (event) {
|
|
rv = event->OnOutputStreamReady(nsnull);
|
|
if (NS_FAILED(rv)) {
|
|
NS_NOTREACHED("leaking stream event");
|
|
nsISupports *sup = event;
|
|
NS_ADDREF(sup);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
public:
|
|
NS_IMETHOD OnOutputStreamReady(nsIAsyncOutputStream *stream)
|
|
{
|
|
mStream = stream;
|
|
|
|
nsresult rv =
|
|
mTarget->Dispatch(this, NS_DISPATCH_NORMAL);
|
|
if (NS_FAILED(rv)) {
|
|
NS_WARNING("PostEvent failed");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHOD Run()
|
|
{
|
|
if (mCallback) {
|
|
if (mStream)
|
|
mCallback->OnOutputStreamReady(mStream);
|
|
mCallback = nsnull;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
private:
|
|
nsCOMPtr<nsIAsyncOutputStream> mStream;
|
|
nsCOMPtr<nsIOutputStreamCallback> mCallback;
|
|
nsCOMPtr<nsIEventTarget> mTarget;
|
|
};
|
|
|
|
NS_IMPL_THREADSAFE_ISUPPORTS2(nsOutputStreamReadyEvent, nsIRunnable,
|
|
nsIOutputStreamCallback)
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
nsresult
|
|
NS_NewInputStreamReadyEvent(nsIInputStreamCallback **event,
|
|
nsIInputStreamCallback *callback,
|
|
nsIEventTarget *target)
|
|
{
|
|
NS_ASSERTION(callback, "null callback");
|
|
NS_ASSERTION(target, "null target");
|
|
nsInputStreamReadyEvent *ev = new nsInputStreamReadyEvent(callback, target);
|
|
if (!ev)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
NS_ADDREF(*event = ev);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
NS_NewOutputStreamReadyEvent(nsIOutputStreamCallback **event,
|
|
nsIOutputStreamCallback *callback,
|
|
nsIEventTarget *target)
|
|
{
|
|
NS_ASSERTION(callback, "null callback");
|
|
NS_ASSERTION(target, "null target");
|
|
nsOutputStreamReadyEvent *ev = new nsOutputStreamReadyEvent(callback, target);
|
|
if (!ev)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
NS_ADDREF(*event = ev);
|
|
return NS_OK;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// NS_AsyncCopy implementation
|
|
|
|
// abstract stream copier...
|
|
class nsAStreamCopier : public nsIInputStreamCallback
|
|
, public nsIOutputStreamCallback
|
|
, public nsIRunnable
|
|
{
|
|
public:
|
|
NS_DECL_ISUPPORTS
|
|
|
|
nsAStreamCopier()
|
|
: mLock("nsAStreamCopier.mLock")
|
|
, mCallback(nsnull)
|
|
, mClosure(nsnull)
|
|
, mChunkSize(0)
|
|
, mEventInProcess(false)
|
|
, mEventIsPending(false)
|
|
, mCloseSource(true)
|
|
, mCloseSink(true)
|
|
, mCanceled(false)
|
|
, mCancelStatus(NS_OK)
|
|
{
|
|
}
|
|
|
|
// virtual since subclasses call superclass Release()
|
|
virtual ~nsAStreamCopier()
|
|
{
|
|
}
|
|
|
|
// kick off the async copy...
|
|
nsresult Start(nsIInputStream *source,
|
|
nsIOutputStream *sink,
|
|
nsIEventTarget *target,
|
|
nsAsyncCopyCallbackFun callback,
|
|
void *closure,
|
|
PRUint32 chunksize,
|
|
bool closeSource,
|
|
bool closeSink)
|
|
{
|
|
mSource = source;
|
|
mSink = sink;
|
|
mTarget = target;
|
|
mCallback = callback;
|
|
mClosure = closure;
|
|
mChunkSize = chunksize;
|
|
mCloseSource = closeSource;
|
|
mCloseSink = closeSink;
|
|
|
|
mAsyncSource = do_QueryInterface(mSource);
|
|
mAsyncSink = do_QueryInterface(mSink);
|
|
|
|
return PostContinuationEvent();
|
|
}
|
|
|
|
// implemented by subclasses, returns number of bytes copied and
|
|
// sets source and sink condition before returning.
|
|
virtual PRUint32 DoCopy(nsresult *sourceCondition, nsresult *sinkCondition) = 0;
|
|
|
|
void Process()
|
|
{
|
|
if (!mSource || !mSink)
|
|
return;
|
|
|
|
nsresult sourceCondition, sinkCondition;
|
|
nsresult cancelStatus;
|
|
bool canceled;
|
|
{
|
|
MutexAutoLock lock(mLock);
|
|
canceled = mCanceled;
|
|
cancelStatus = mCancelStatus;
|
|
}
|
|
|
|
// Copy data from the source to the sink until we hit failure or have
|
|
// copied all the data.
|
|
for (;;) {
|
|
// Note: copyFailed will be true if the source or the sink have
|
|
// reported an error, or if we failed to write any bytes
|
|
// because we have consumed all of our data.
|
|
bool copyFailed = false;
|
|
if (!canceled) {
|
|
PRUint32 n = DoCopy(&sourceCondition, &sinkCondition);
|
|
copyFailed = NS_FAILED(sourceCondition) ||
|
|
NS_FAILED(sinkCondition) || n == 0;
|
|
|
|
MutexAutoLock lock(mLock);
|
|
canceled = mCanceled;
|
|
cancelStatus = mCancelStatus;
|
|
}
|
|
if (copyFailed && !canceled) {
|
|
if (sourceCondition == NS_BASE_STREAM_WOULD_BLOCK && mAsyncSource) {
|
|
// need to wait for more data from source. while waiting for
|
|
// more source data, be sure to observe failures on output end.
|
|
mAsyncSource->AsyncWait(this, 0, 0, nsnull);
|
|
|
|
if (mAsyncSink)
|
|
mAsyncSink->AsyncWait(this,
|
|
nsIAsyncOutputStream::WAIT_CLOSURE_ONLY,
|
|
0, nsnull);
|
|
break;
|
|
}
|
|
else if (sinkCondition == NS_BASE_STREAM_WOULD_BLOCK && mAsyncSink) {
|
|
// need to wait for more room in the sink. while waiting for
|
|
// more room in the sink, be sure to observer failures on the
|
|
// input end.
|
|
mAsyncSink->AsyncWait(this, 0, 0, nsnull);
|
|
|
|
if (mAsyncSource)
|
|
mAsyncSource->AsyncWait(this,
|
|
nsIAsyncInputStream::WAIT_CLOSURE_ONLY,
|
|
0, nsnull);
|
|
break;
|
|
}
|
|
}
|
|
if (copyFailed || canceled) {
|
|
if (mCloseSource) {
|
|
// close source
|
|
if (mAsyncSource)
|
|
mAsyncSource->CloseWithStatus(canceled ? cancelStatus :
|
|
sinkCondition);
|
|
else
|
|
mSource->Close();
|
|
}
|
|
mAsyncSource = nsnull;
|
|
mSource = nsnull;
|
|
|
|
if (mCloseSink) {
|
|
// close sink
|
|
if (mAsyncSink)
|
|
mAsyncSink->CloseWithStatus(canceled ? cancelStatus :
|
|
sourceCondition);
|
|
else {
|
|
// If we have an nsISafeOutputStream, and our
|
|
// sourceCondition and sinkCondition are not set to a
|
|
// failure state, finish writing.
|
|
nsCOMPtr<nsISafeOutputStream> sostream =
|
|
do_QueryInterface(mSink);
|
|
if (sostream && NS_SUCCEEDED(sourceCondition) &&
|
|
NS_SUCCEEDED(sinkCondition))
|
|
sostream->Finish();
|
|
else
|
|
mSink->Close();
|
|
}
|
|
}
|
|
mAsyncSink = nsnull;
|
|
mSink = nsnull;
|
|
|
|
// notify state complete...
|
|
if (mCallback) {
|
|
nsresult status;
|
|
if (!canceled) {
|
|
status = sourceCondition;
|
|
if (NS_SUCCEEDED(status))
|
|
status = sinkCondition;
|
|
if (status == NS_BASE_STREAM_CLOSED)
|
|
status = NS_OK;
|
|
} else {
|
|
status = cancelStatus;
|
|
}
|
|
mCallback(mClosure, status);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
nsresult Cancel(nsresult aReason)
|
|
{
|
|
MutexAutoLock lock(mLock);
|
|
if (mCanceled)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
if (NS_SUCCEEDED(aReason)) {
|
|
NS_WARNING("cancel with non-failure status code");
|
|
aReason = NS_BASE_STREAM_CLOSED;
|
|
}
|
|
|
|
mCanceled = true;
|
|
mCancelStatus = aReason;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHOD OnInputStreamReady(nsIAsyncInputStream *source)
|
|
{
|
|
PostContinuationEvent();
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHOD OnOutputStreamReady(nsIAsyncOutputStream *sink)
|
|
{
|
|
PostContinuationEvent();
|
|
return NS_OK;
|
|
}
|
|
|
|
// continuation event handler
|
|
NS_IMETHOD Run()
|
|
{
|
|
Process();
|
|
|
|
// clear "in process" flag and post any pending continuation event
|
|
MutexAutoLock lock(mLock);
|
|
mEventInProcess = false;
|
|
if (mEventIsPending) {
|
|
mEventIsPending = false;
|
|
PostContinuationEvent_Locked();
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult PostContinuationEvent()
|
|
{
|
|
// we cannot post a continuation event if there is currently
|
|
// an event in process. doing so could result in Process being
|
|
// run simultaneously on multiple threads, so we mark the event
|
|
// as pending, and if an event is already in process then we
|
|
// just let that existing event take care of posting the real
|
|
// continuation event.
|
|
|
|
MutexAutoLock lock(mLock);
|
|
return PostContinuationEvent_Locked();
|
|
}
|
|
|
|
nsresult PostContinuationEvent_Locked()
|
|
{
|
|
nsresult rv = NS_OK;
|
|
if (mEventInProcess)
|
|
mEventIsPending = true;
|
|
else {
|
|
rv = mTarget->Dispatch(this, NS_DISPATCH_NORMAL);
|
|
if (NS_SUCCEEDED(rv))
|
|
mEventInProcess = true;
|
|
else
|
|
NS_WARNING("unable to post continuation event");
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
protected:
|
|
nsCOMPtr<nsIInputStream> mSource;
|
|
nsCOMPtr<nsIOutputStream> mSink;
|
|
nsCOMPtr<nsIAsyncInputStream> mAsyncSource;
|
|
nsCOMPtr<nsIAsyncOutputStream> mAsyncSink;
|
|
nsCOMPtr<nsIEventTarget> mTarget;
|
|
Mutex mLock;
|
|
nsAsyncCopyCallbackFun mCallback;
|
|
void *mClosure;
|
|
PRUint32 mChunkSize;
|
|
bool mEventInProcess;
|
|
bool mEventIsPending;
|
|
bool mCloseSource;
|
|
bool mCloseSink;
|
|
bool mCanceled;
|
|
nsresult mCancelStatus;
|
|
};
|
|
|
|
NS_IMPL_THREADSAFE_ISUPPORTS3(nsAStreamCopier,
|
|
nsIInputStreamCallback,
|
|
nsIOutputStreamCallback,
|
|
nsIRunnable)
|
|
|
|
class nsStreamCopierIB : public nsAStreamCopier
|
|
{
|
|
public:
|
|
nsStreamCopierIB() : nsAStreamCopier() {}
|
|
virtual ~nsStreamCopierIB() {}
|
|
|
|
struct ReadSegmentsState {
|
|
nsIOutputStream *mSink;
|
|
nsresult mSinkCondition;
|
|
};
|
|
|
|
static NS_METHOD ConsumeInputBuffer(nsIInputStream *inStr,
|
|
void *closure,
|
|
const char *buffer,
|
|
PRUint32 offset,
|
|
PRUint32 count,
|
|
PRUint32 *countWritten)
|
|
{
|
|
ReadSegmentsState *state = (ReadSegmentsState *) closure;
|
|
|
|
nsresult rv = state->mSink->Write(buffer, count, countWritten);
|
|
if (NS_FAILED(rv))
|
|
state->mSinkCondition = rv;
|
|
else if (*countWritten == 0)
|
|
state->mSinkCondition = NS_BASE_STREAM_CLOSED;
|
|
|
|
return state->mSinkCondition;
|
|
}
|
|
|
|
PRUint32 DoCopy(nsresult *sourceCondition, nsresult *sinkCondition)
|
|
{
|
|
ReadSegmentsState state;
|
|
state.mSink = mSink;
|
|
state.mSinkCondition = NS_OK;
|
|
|
|
PRUint32 n;
|
|
*sourceCondition =
|
|
mSource->ReadSegments(ConsumeInputBuffer, &state, mChunkSize, &n);
|
|
*sinkCondition = state.mSinkCondition;
|
|
return n;
|
|
}
|
|
};
|
|
|
|
class nsStreamCopierOB : public nsAStreamCopier
|
|
{
|
|
public:
|
|
nsStreamCopierOB() : nsAStreamCopier() {}
|
|
virtual ~nsStreamCopierOB() {}
|
|
|
|
struct WriteSegmentsState {
|
|
nsIInputStream *mSource;
|
|
nsresult mSourceCondition;
|
|
};
|
|
|
|
static NS_METHOD FillOutputBuffer(nsIOutputStream *outStr,
|
|
void *closure,
|
|
char *buffer,
|
|
PRUint32 offset,
|
|
PRUint32 count,
|
|
PRUint32 *countRead)
|
|
{
|
|
WriteSegmentsState *state = (WriteSegmentsState *) closure;
|
|
|
|
nsresult rv = state->mSource->Read(buffer, count, countRead);
|
|
if (NS_FAILED(rv))
|
|
state->mSourceCondition = rv;
|
|
else if (*countRead == 0)
|
|
state->mSourceCondition = NS_BASE_STREAM_CLOSED;
|
|
|
|
return state->mSourceCondition;
|
|
}
|
|
|
|
PRUint32 DoCopy(nsresult *sourceCondition, nsresult *sinkCondition)
|
|
{
|
|
WriteSegmentsState state;
|
|
state.mSource = mSource;
|
|
state.mSourceCondition = NS_OK;
|
|
|
|
PRUint32 n;
|
|
*sinkCondition =
|
|
mSink->WriteSegments(FillOutputBuffer, &state, mChunkSize, &n);
|
|
*sourceCondition = state.mSourceCondition;
|
|
return n;
|
|
}
|
|
};
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
nsresult
|
|
NS_AsyncCopy(nsIInputStream *source,
|
|
nsIOutputStream *sink,
|
|
nsIEventTarget *target,
|
|
nsAsyncCopyMode mode,
|
|
PRUint32 chunkSize,
|
|
nsAsyncCopyCallbackFun callback,
|
|
void *closure,
|
|
bool closeSource,
|
|
bool closeSink,
|
|
nsISupports **aCopierCtx)
|
|
{
|
|
NS_ASSERTION(target, "non-null target required");
|
|
|
|
nsresult rv;
|
|
nsAStreamCopier *copier;
|
|
|
|
if (mode == NS_ASYNCCOPY_VIA_READSEGMENTS)
|
|
copier = new nsStreamCopierIB();
|
|
else
|
|
copier = new nsStreamCopierOB();
|
|
|
|
if (!copier)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
// Start() takes an owning ref to the copier...
|
|
NS_ADDREF(copier);
|
|
rv = copier->Start(source, sink, target, callback, closure, chunkSize,
|
|
closeSource, closeSink);
|
|
|
|
if (aCopierCtx) {
|
|
*aCopierCtx = static_cast<nsISupports*>(
|
|
static_cast<nsIRunnable*>(copier));
|
|
NS_ADDREF(*aCopierCtx);
|
|
}
|
|
NS_RELEASE(copier);
|
|
|
|
return rv;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
nsresult
|
|
NS_CancelAsyncCopy(nsISupports *aCopierCtx, nsresult aReason)
|
|
{
|
|
nsAStreamCopier *copier = static_cast<nsAStreamCopier *>(
|
|
static_cast<nsIRunnable *>(aCopierCtx));
|
|
return copier->Cancel(aReason);
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
nsresult
|
|
NS_ConsumeStream(nsIInputStream *stream, PRUint32 maxCount, nsACString &result)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
result.Truncate();
|
|
|
|
while (maxCount) {
|
|
PRUint32 avail;
|
|
rv = stream->Available(&avail);
|
|
if (NS_FAILED(rv)) {
|
|
if (rv == NS_BASE_STREAM_CLOSED)
|
|
rv = NS_OK;
|
|
break;
|
|
}
|
|
if (avail == 0)
|
|
break;
|
|
if (avail > maxCount)
|
|
avail = maxCount;
|
|
|
|
// resize result buffer
|
|
PRUint32 length = result.Length();
|
|
result.SetLength(length + avail);
|
|
if (result.Length() != (length + avail))
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
char *buf = result.BeginWriting() + length;
|
|
|
|
PRUint32 n;
|
|
rv = stream->Read(buf, avail, &n);
|
|
if (NS_FAILED(rv))
|
|
break;
|
|
if (n != avail)
|
|
result.SetLength(length + n);
|
|
if (n == 0)
|
|
break;
|
|
maxCount -= n;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
static NS_METHOD
|
|
TestInputStream(nsIInputStream *inStr,
|
|
void *closure,
|
|
const char *buffer,
|
|
PRUint32 offset,
|
|
PRUint32 count,
|
|
PRUint32 *countWritten)
|
|
{
|
|
bool *result = static_cast<bool *>(closure);
|
|
*result = true;
|
|
return NS_ERROR_ABORT; // don't call me anymore
|
|
}
|
|
|
|
bool
|
|
NS_InputStreamIsBuffered(nsIInputStream *stream)
|
|
{
|
|
bool result = false;
|
|
PRUint32 n;
|
|
nsresult rv = stream->ReadSegments(TestInputStream,
|
|
&result, 1, &n);
|
|
return result || NS_SUCCEEDED(rv);
|
|
}
|
|
|
|
static NS_METHOD
|
|
TestOutputStream(nsIOutputStream *outStr,
|
|
void *closure,
|
|
char *buffer,
|
|
PRUint32 offset,
|
|
PRUint32 count,
|
|
PRUint32 *countRead)
|
|
{
|
|
bool *result = static_cast<bool *>(closure);
|
|
*result = true;
|
|
return NS_ERROR_ABORT; // don't call me anymore
|
|
}
|
|
|
|
bool
|
|
NS_OutputStreamIsBuffered(nsIOutputStream *stream)
|
|
{
|
|
bool result = false;
|
|
PRUint32 n;
|
|
stream->WriteSegments(TestOutputStream, &result, 1, &n);
|
|
return result;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
NS_METHOD
|
|
NS_CopySegmentToStream(nsIInputStream *inStr,
|
|
void *closure,
|
|
const char *buffer,
|
|
PRUint32 offset,
|
|
PRUint32 count,
|
|
PRUint32 *countWritten)
|
|
{
|
|
nsIOutputStream *outStr = static_cast<nsIOutputStream *>(closure);
|
|
*countWritten = 0;
|
|
while (count) {
|
|
PRUint32 n;
|
|
nsresult rv = outStr->Write(buffer, count, &n);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
buffer += n;
|
|
count -= n;
|
|
*countWritten += n;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_METHOD
|
|
NS_CopySegmentToBuffer(nsIInputStream *inStr,
|
|
void *closure,
|
|
const char *buffer,
|
|
PRUint32 offset,
|
|
PRUint32 count,
|
|
PRUint32 *countWritten)
|
|
{
|
|
char *toBuf = static_cast<char *>(closure);
|
|
memcpy(&toBuf[offset], buffer, count);
|
|
*countWritten = count;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_METHOD
|
|
NS_DiscardSegment(nsIInputStream *inStr,
|
|
void *closure,
|
|
const char *buffer,
|
|
PRUint32 offset,
|
|
PRUint32 count,
|
|
PRUint32 *countWritten)
|
|
{
|
|
*countWritten = count;
|
|
return NS_OK;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
NS_METHOD
|
|
NS_WriteSegmentThunk(nsIInputStream *inStr,
|
|
void *closure,
|
|
const char *buffer,
|
|
PRUint32 offset,
|
|
PRUint32 count,
|
|
PRUint32 *countWritten)
|
|
{
|
|
nsWriteSegmentThunk *thunk = static_cast<nsWriteSegmentThunk *>(closure);
|
|
return thunk->mFun(thunk->mStream, thunk->mClosure, buffer, offset, count,
|
|
countWritten);
|
|
}
|