mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-06 09:05:45 +00:00
107 lines
3.7 KiB
C++
107 lines
3.7 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 1.1 (the "License"); you may not use this file
|
|
* except in compliance with the License. You may obtain a copy of
|
|
* the License at http://www.mozilla.org/NPL/
|
|
*
|
|
* 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 Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All
|
|
* Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*/
|
|
|
|
#include "nsFileSpecStreaming.h"
|
|
|
|
#include "nsIInputStream.h"
|
|
#include "nsIOutputStream.h"
|
|
#include "nsFileStream.h"
|
|
#include "nsFileSpec.h"
|
|
|
|
#define MAX_PERSISTENT_DATA_SIZE 1000
|
|
|
|
//----------------------------------------------------------------------------------------
|
|
nsOutputStream& operator << (nsOutputStream& s, const nsFileURL& url)
|
|
//----------------------------------------------------------------------------------------
|
|
{
|
|
return s << url.GetAsString();
|
|
}
|
|
|
|
//----------------------------------------------------------------------------------------
|
|
nsresult ReadDescriptor(
|
|
nsIInputStream* aStream,
|
|
nsPersistentFileDescriptor& desc)
|
|
//----------------------------------------------------------------------------------------
|
|
{
|
|
nsInputStream inputStream(aStream);
|
|
inputStream >> desc;
|
|
return NS_OK;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------------------
|
|
nsresult WriteDescriptor(
|
|
nsIOutputStream* aStream,
|
|
const nsPersistentFileDescriptor& desc)
|
|
//----------------------------------------------------------------------------------------
|
|
{
|
|
nsOutputStream outputStream(aStream);
|
|
outputStream << desc;
|
|
return NS_OK;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------------------
|
|
nsInputStream& operator >> (nsInputStream& s, nsPersistentFileDescriptor& d)
|
|
// reads the data from a file
|
|
//----------------------------------------------------------------------------------------
|
|
{
|
|
char bigBuffer[MAX_PERSISTENT_DATA_SIZE + 1];
|
|
// The first 8 bytes of the data should be a hex version of the data size to follow.
|
|
PRInt32 bytesRead = 8;
|
|
bytesRead = s.read(bigBuffer, bytesRead);
|
|
if (bytesRead != 8)
|
|
return s;
|
|
bigBuffer[8] = '\0';
|
|
sscanf(bigBuffer, "%x", (PRUint32*)&bytesRead);
|
|
if (bytesRead > MAX_PERSISTENT_DATA_SIZE)
|
|
{
|
|
// Try to tolerate encoded values with no length header
|
|
bytesRead = 8 + s.read(bigBuffer + 8, MAX_PERSISTENT_DATA_SIZE - 8);
|
|
}
|
|
else
|
|
{
|
|
// Now we know how many bytes to read, do it.
|
|
bytesRead = s.read(bigBuffer, bytesRead);
|
|
}
|
|
// Make sure we are null terminated
|
|
bigBuffer[bytesRead]='\0';
|
|
d.SetData(bigBuffer, bytesRead);
|
|
return s;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------------------
|
|
nsOutputStream& operator << (nsOutputStream& s, const nsPersistentFileDescriptor& d)
|
|
// writes the data to a file
|
|
//----------------------------------------------------------------------------------------
|
|
{
|
|
char littleBuf[9];
|
|
PRInt32 dataSize;
|
|
nsSimpleCharString data;
|
|
d.GetData(data, dataSize);
|
|
// First write (in hex) the length of the data to follow. Exactly 8 bytes
|
|
sprintf(littleBuf, "%.8x", dataSize);
|
|
s << littleBuf;
|
|
// Now write the data itself
|
|
s << (const char*)data;
|
|
return s;
|
|
}
|
|
|