nsStringStream.cpp revision 677833bc953b6cb418c701facbdcf4aa18d6c44e
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** 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
*
* 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.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* mcmullen@netscape.com (original author)
* warren@netscape.com
* alecf@netscape.com
* scc@mozilla.org
* david.gardiner@unisa.edu.au
* fur@netscape.com
* norris@netscape.com
* pinkerton@netscape.com
* davidm@netscape.com
* sfraser@netscape.com
* darin@netscape.com
* bzbarsky@mit.edu
*
* Alternatively, the contents of this file may be used under the terms of
* either of 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 ***** */
/**
* Based on original code from nsIStringStream.cpp
*/
#include "nsStringStream.h"
#include "prerror.h"
#include "plstr.h"
#include "nsReadableUtils.h"
#include "nsCRT.h"
#include "nsISeekableStream.h"
#include "nsInt64.h"
{
return nativeErr ?
: NS_OK;
}
//-----------------------------------------------------------------------------
// nsIStringInputStream implementation
//-----------------------------------------------------------------------------
class nsStringInputStream : public nsIStringInputStream
, public nsIRandomAccessStore
{
public:
: mOffset(0)
, mLastResult(NS_OK)
, mLength(0)
{}
private:
{
if (mOwned)
}
public:
// nsIRandomAccessStore interface
protected:
PRInt32 LengthRemaining() const
{
}
void Clear()
{
"Can't have mOwned set and have a null string!");
if (mOwned)
// We're about to get a new string; clear the members that
// would no longer have valid values.
mOffset = 0;
mLastResult = NS_OK;
}
const char* mConstString;
};
/////////
// nsIStringInputStream implementation
/////////
{
if (dataLen < 0)
}
{
if (dataLen < 0)
Clear();
mConstString = (const char *) data;
return NS_OK;
}
{
if (dataLen < 0)
Clear();
mConstString = data;
return NS_OK;
}
/////////
// nsIInputStream implementation
/////////
{
return NS_OK;
}
{
if (!aLength)
return NS_ERROR_NULL_POINTER;
*aLength = LengthRemaining();
return NS_OK;
}
{
if (!aBuf)
return NS_ERROR_NULL_POINTER;
if (!aReadCount)
return NS_ERROR_NULL_POINTER;
if (NS_FAILED(mLastResult))
return mLastResult;
else
*aReadCount = bytesRead;
return NS_OK;
}
{
if (maxCount == 0) {
*result = 0;
return NS_OK;
}
if (NS_SUCCEEDED(rv))
// errors returned from the writer end here!
return NS_OK;
}
{
*aNonBlocking = PR_TRUE;
return NS_OK;
}
/////////
// nsISeekableStream implementation
/////////
{
switch (whence)
{
}
if (newPosition < 0)
{
newPosition = 0;
}
if (newPosition >= fileSize)
{
}
return NS_OK;
}
{
return NS_OK;
}
{
NS_NOTYETIMPLEMENTED("nsStringInputStream::SetEOF");
return NS_ERROR_NOT_IMPLEMENTED;
}
/////////
// nsIRandomAccessStore implementation
/////////
{
return NS_OK;
}
{
return NS_OK;
}
// Factory method to get an nsInputStream from an nsAString. Result will
// implement nsIStringInputStream and nsIRandomAccessStore
const nsAString& aStringToRead)
{
if (!data)
return NS_ERROR_OUT_OF_MEMORY;
if (! stream) {
return NS_ERROR_OUT_OF_MEMORY;
}
return rv;
}
*aStreamResult = stream;
return NS_OK;
}
// Factory method to get an nsInputStream from an nsACString. Result will
// implement nsIStringInputStream and nsIRandomAccessStore
const nsACString& aStringToRead)
{
if (!data)
return NS_ERROR_OUT_OF_MEMORY;
if (! stream) {
return NS_ERROR_OUT_OF_MEMORY;
}
return rv;
}
*aStreamResult = stream;
return NS_OK;
}
// Factory method to get an nsInputStream from a C string. Result will
// implement nsIStringInputStream and nsIRandomAccessStore
const char* aStringToRead)
{
if (! stream)
return NS_ERROR_OUT_OF_MEMORY;
return rv;
}
*aStreamResult = stream;
return NS_OK;
}
// Factory method to get an nsInputStream from a byte array. Result will
// implement nsIStringInputStream and nsIRandomAccessStore
const char* aStringToRead,
{
if (! stream)
return NS_ERROR_OUT_OF_MEMORY;
return rv;
}
*aStreamResult = stream;
return NS_OK;
}
// factory method for constructing a nsStringInputStream object
{
if (outer)
return NS_ERROR_NO_AGGREGATION;
if (!inst)
return NS_ERROR_OUT_OF_MEMORY;
return rv;
}