зеркало из https://github.com/mozilla/gecko-dev.git
123 строки
3.8 KiB
C++
123 строки
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef nsBufferedStreams_h__
|
|
#define nsBufferedStreams_h__
|
|
|
|
#include "nsIBufferedStreams.h"
|
|
#include "nsIInputStream.h"
|
|
#include "nsIOutputStream.h"
|
|
#include "nsISafeOutputStream.h"
|
|
#include "nsISeekableStream.h"
|
|
#include "nsIStreamBufferAccess.h"
|
|
#include "nsCOMPtr.h"
|
|
#include "nsIIPCSerializableInputStream.h"
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
class nsBufferedStream : public nsISeekableStream
|
|
{
|
|
public:
|
|
NS_DECL_THREADSAFE_ISUPPORTS
|
|
NS_DECL_NSISEEKABLESTREAM
|
|
|
|
nsBufferedStream();
|
|
|
|
nsresult Close();
|
|
|
|
protected:
|
|
virtual ~nsBufferedStream();
|
|
|
|
nsresult Init(nsISupports* stream, uint32_t bufferSize);
|
|
NS_IMETHOD Fill() = 0;
|
|
NS_IMETHOD Flush() = 0;
|
|
|
|
uint32_t mBufferSize;
|
|
char* mBuffer;
|
|
|
|
// mBufferStartOffset is the offset relative to the start of mStream.
|
|
int64_t mBufferStartOffset;
|
|
|
|
// mCursor is the read cursor for input streams, or write cursor for
|
|
// output streams, and is relative to mBufferStartOffset.
|
|
uint32_t mCursor;
|
|
|
|
// mFillPoint is the amount available in the buffer for input streams,
|
|
// or the high watermark of bytes written into the buffer, and therefore
|
|
// is relative to mBufferStartOffset.
|
|
uint32_t mFillPoint;
|
|
|
|
nsISupports* mStream; // cast to appropriate subclass
|
|
|
|
bool mBufferDisabled;
|
|
bool mEOF; // True if mStream is at EOF
|
|
uint8_t mGetBufferCount;
|
|
};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
class nsBufferedInputStream : public nsBufferedStream,
|
|
public nsIBufferedInputStream,
|
|
public nsIStreamBufferAccess,
|
|
public nsIIPCSerializableInputStream
|
|
{
|
|
public:
|
|
NS_DECL_ISUPPORTS_INHERITED
|
|
NS_DECL_NSIINPUTSTREAM
|
|
NS_DECL_NSIBUFFEREDINPUTSTREAM
|
|
NS_DECL_NSISTREAMBUFFERACCESS
|
|
NS_DECL_NSIIPCSERIALIZABLEINPUTSTREAM
|
|
|
|
nsBufferedInputStream() : nsBufferedStream() {}
|
|
|
|
static nsresult
|
|
Create(nsISupports *aOuter, REFNSIID aIID, void **aResult);
|
|
|
|
nsIInputStream* Source() {
|
|
return (nsIInputStream*)mStream;
|
|
}
|
|
|
|
protected:
|
|
virtual ~nsBufferedInputStream() {}
|
|
|
|
NS_IMETHOD Fill() MOZ_OVERRIDE;
|
|
NS_IMETHOD Flush() MOZ_OVERRIDE { return NS_OK; } // no-op for input streams
|
|
};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
class nsBufferedOutputStream : public nsBufferedStream,
|
|
public nsISafeOutputStream,
|
|
public nsIBufferedOutputStream,
|
|
public nsIStreamBufferAccess
|
|
{
|
|
public:
|
|
NS_DECL_ISUPPORTS_INHERITED
|
|
NS_DECL_NSIOUTPUTSTREAM
|
|
NS_DECL_NSISAFEOUTPUTSTREAM
|
|
NS_DECL_NSIBUFFEREDOUTPUTSTREAM
|
|
NS_DECL_NSISTREAMBUFFERACCESS
|
|
|
|
nsBufferedOutputStream() : nsBufferedStream() {}
|
|
|
|
static nsresult
|
|
Create(nsISupports *aOuter, REFNSIID aIID, void **aResult);
|
|
|
|
nsIOutputStream* Sink() {
|
|
return (nsIOutputStream*)mStream;
|
|
}
|
|
|
|
protected:
|
|
virtual ~nsBufferedOutputStream() { nsBufferedOutputStream::Close(); }
|
|
|
|
NS_IMETHOD Fill() MOZ_OVERRIDE { return NS_OK; } // no-op for output streams
|
|
|
|
nsCOMPtr<nsISafeOutputStream> mSafeStream; // QI'd from mStream
|
|
};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#endif // nsBufferedStreams_h__
|