mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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141 lines
2.9 KiB
C++
141 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_indexeddb_filestream_h__
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#define mozilla_dom_indexeddb_filestream_h__
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#include "IndexedDatabase.h"
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#include "nsIFileStreams.h"
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#include "nsIInputStream.h"
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#include "nsIOutputStream.h"
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#include "nsISeekableStream.h"
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#include "nsIStandardFileStream.h"
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class nsIFile;
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struct quota_FILE;
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BEGIN_INDEXEDDB_NAMESPACE
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class FileStream : public nsISeekableStream,
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public nsIInputStream,
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public nsIOutputStream,
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public nsIStandardFileStream,
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public nsIFileMetadata
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{
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public:
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FileStream()
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: mFlags(0),
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mDeferredOpen(false),
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mQuotaFile(nullptr)
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{ }
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virtual ~FileStream()
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{
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Close();
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}
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NS_DECL_ISUPPORTS
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NS_DECL_NSISEEKABLESTREAM
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NS_DECL_NSISTANDARDFILESTREAM
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NS_DECL_NSIFILEMETADATA
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// nsIInputStream
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NS_IMETHOD
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Close();
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NS_IMETHOD
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Available(PRUint32* _retval);
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NS_IMETHOD
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Read(char* aBuf, PRUint32 aCount, PRUint32* _retval);
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NS_IMETHOD
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ReadSegments(nsWriteSegmentFun aWriter, void* aClosure, PRUint32 aCount,
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PRUint32* _retval);
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NS_IMETHOD
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IsNonBlocking(bool* _retval);
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// nsIOutputStream
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// Close() already declared
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NS_IMETHOD
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Flush();
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NS_IMETHOD
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Write(const char* aBuf, PRUint32 aCount, PRUint32* _retval);
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NS_IMETHOD
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WriteFrom(nsIInputStream* aFromStream, PRUint32 aCount, PRUint32* _retval);
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NS_IMETHOD
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WriteSegments(nsReadSegmentFun aReader, void* aClosure, PRUint32 aCount,
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PRUint32* _retval);
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// IsNonBlocking() already declared
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protected:
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/**
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* Cleans up data prepared in Init.
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*/
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void
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CleanUpOpen()
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{
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mFilePath.Truncate();
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mDeferredOpen = false;
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}
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/**
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* Open the file. This is called either from Init
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* or from DoPendingOpen (if FLAGS_DEFER_OPEN is used when initializing this
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* stream). The default behavior of DoOpen is to open the file and save the
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* file descriptor.
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*/
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virtual nsresult
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DoOpen();
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/**
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* If there is a pending open, do it now. It's important for this to be
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* inlined since we do it in almost every stream API call.
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*/
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nsresult
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DoPendingOpen()
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{
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if (!mDeferredOpen) {
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return NS_OK;
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}
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return DoOpen();
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}
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/**
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* Data we need to do an open.
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*/
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nsString mFilePath;
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nsString mMode;
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/**
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* Flags describing our behavior. See the IDL file for possible values.
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*/
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PRInt32 mFlags;
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/**
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* Whether we have a pending open (see FLAGS_DEFER_OPEN in the IDL file).
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*/
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bool mDeferredOpen;
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/**
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* File descriptor for opened file.
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*/
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quota_FILE* mQuotaFile;
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};
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END_INDEXEDDB_NAMESPACE
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#endif // mozilla_dom_indexeddb_filestream_h__
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