gecko-dev/xpcom/io/nsIFileStream.h
1999-04-22 07:31:03 +00:00

146 lines
6.1 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsIFileStream_h___
#define nsIFileStream_h___
#include "nsIInputStream.h"
#include "nsIOutputStream.h"
#include "prio.h"
class nsFileSpec;
/* a6cf90e8-15b3-11d2-932e-00805f8add32 */
#define NS_IFILE_IID \
{ 0xa6cf90e8, 0x15b3, 0x11d2, \
{0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} }
//========================================================================================
class nsIFile
// Represents a file, and supports Open.
//========================================================================================
: public nsISupports
{
public:
static const nsIID& GetIID() { static nsIID iid = NS_IFILE_IID; return iid; }
NS_IMETHOD Open(
const nsFileSpec& inFile,
int nsprMode,
PRIntn accessMode) = 0;
// Note: Open() is only needed after
// an explicit Close(). All file streams
// are automatically opened on construction.
NS_IMETHOD GetIsOpen(PRBool* outOpen) = 0;
}; // class nsIFile
/* a6cf90e8-15b3-11d2-932e-00805f8add32 */
#define NS_IRANDOMACCESS_IID \
{ 0xa6cf90eb, 0x15b3, 0x11d2, \
{0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} }
//========================================================================================
class nsIRandomAccessStore
// Supports Seek, Tell etc.
//========================================================================================
: public nsISupports
{
public:
static const nsIID& GetIID() { static nsIID iid = NS_IRANDOMACCESS_IID; return iid; }
NS_IMETHOD Seek(PRSeekWhence whence, PRInt32 offset) = 0;
NS_IMETHOD Tell(PRIntn* outWhere) = 0;
/* "PROTECTED" */
NS_IMETHOD GetAtEOF(PRBool* outAtEOF) = 0;
NS_IMETHOD SetAtEOF(PRBool inAtEOF) = 0;
}; // class nsIRandomAccessStore
/* a6cf90e6-15b3-11d2-932e-00805f8add32 */
#define NS_IFILEINPUTSTREAM_IID \
{ 0xa6cf90e6, 0x15b3, 0x11d2, \
{0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} }
//========================================================================================
class nsIFileInputStream
// These are additional file-specific methods that files have, above what
// nsIInputStream supports. The current implementation supports both
// interfaces.
//========================================================================================
: public nsIInputStream
{
public:
static const nsIID& GetIID() { static nsIID iid = NS_IFILEINPUTSTREAM_IID; return iid; }
}; // class nsIFileInputStream
/* a6cf90e7-15b3-11d2-932e-00805f8add32 */
#define NS_IFILEOUTPUTSTREAM_IID \
{ 0xa6cf90e7, 0x15b3, 0x11d2, \
{0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} }
//========================================================================================
class nsIFileOutputStream
// These are additional file-specific methods that files have, above what
// nsIOutputStream supports. The current implementation supports both
// interfaces.
//========================================================================================
: public nsIOutputStream
{
public:
static const nsIID& GetIID() { static nsIID iid = NS_IFILEOUTPUTSTREAM_IID; return iid; }
}; // class nsIFileOutputStream
//----------------------------------------------------------------------------------------
extern "C" NS_BASE nsresult NS_NewTypicalInputFileStream(
nsISupports** aStreamResult,
const nsFileSpec& inFile
/*Default nsprMode == PR_RDONLY*/
/*Default accessmode = 0700 (octal)*/);
// Factory method to get an nsInputStream from a file, using most common options
//----------------------------------------------------------------------------------------
extern "C" NS_BASE nsresult NS_NewOutputConsoleStream(
nsISupports** aStreamResult);
// Factory method to get an nsOutputStream to the console.
//----------------------------------------------------------------------------------------
extern "C" NS_BASE nsresult NS_NewTypicalOutputFileStream(
nsISupports** aStreamResult, // will implement all the above interfaces
const nsFileSpec& inFile
/*default nsprMode= (PR_WRONLY | PR_CREATE_FILE | PR_TRUNCATE)*/
/*Default accessMode= 0700 (octal)*/);
// Factory method to get an nsOutputStream to a file - most common case.
//----------------------------------------------------------------------------------------
extern "C" NS_BASE nsresult NS_NewTypicalIOFileStream(
nsISupports** aStreamResult, // will implement all the above interfaces
const nsFileSpec& inFile
/*default nsprMode = (PR_RDWR | PR_CREATE_FILE)*/
/*Default accessMode = 0700 (octal)*/);
// Factory method to get an object that implements both nsIInputStream
// and nsIOutputStream, associated with a single file.
//----------------------------------------------------------------------------------------
extern "C" NS_BASE nsresult NS_NewIOFileStream(
nsISupports** aStreamResult, // will implement all the above interfaces
const nsFileSpec& inFile,
PRInt32 nsprMode,
PRInt32 accessMode);
// Factory method to get an object that implements both nsIInputStream
// and nsIOutputStream, associated with a single file.
#endif /* nsIFileStream_h___ */