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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /netwerk/base/nsBufferedStreams.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'netwerk/base/nsBufferedStreams.h')
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diff --git a/netwerk/base/nsBufferedStreams.h b/netwerk/base/nsBufferedStreams.h
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+++ b/netwerk/base/nsBufferedStreams.h
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+/* -*- 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() override;
+ NS_IMETHOD Flush() override { return NS_OK; } // no-op for input streams
+};
+
+////////////////////////////////////////////////////////////////////////////////
+
+class nsBufferedOutputStream final : 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() override { return NS_OK; } // no-op for output streams
+
+ nsCOMPtr<nsISafeOutputStream> mSafeStream; // QI'd from mStream
+};
+
+////////////////////////////////////////////////////////////////////////////////
+
+#endif // nsBufferedStreams_h__