/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** 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
 * http://www.mozilla.org/MPL/
 *
 * 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 Communicator client 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):
 *
 * 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 ***** */
 
#include "nsInternetConfig.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "nsDebug.h"

#include <CodeFragments.h>   
#include <Processes.h>
ICInstance nsInternetConfig::sInstance = NULL;
long nsInternetConfig::sSeed = 0;
PRInt32  nsInternetConfig::sRefCount = 0;



static OSType GetAppCreatorCode()
{
  ProcessSerialNumber psn = { 0, kCurrentProcess } ;
  ProcessInfoRec      procInfo;
  
  procInfo.processInfoLength = sizeof(ProcessInfoRec);
  procInfo.processName = nsnull;
  procInfo.processAppSpec = nsnull;
  
  GetProcessInformation(&psn, &procInfo);
  return procInfo.processSignature;  
}



ICInstance nsInternetConfig::GetInstance()
{
	if ( !sInstance )
	{
		OSStatus err;
		if ((long)ICStart == kUnresolvedCFragSymbolAddress )
			return sInstance;                          
                                                                                 
                                                                                  
		OSType creator = GetAppCreatorCode();
		err = ::ICStart( &sInstance, creator  );
		if ( err != noErr )
		{
			::ICStop( sInstance );
		}
		else
		{
#if !TARGET_CARBON
			::ICFindConfigFile( sInstance, 0 , nil );
#endif
			::ICGetSeed( sInstance, &sSeed );
		}
	}
	return sInstance;
}

PRBool nsInternetConfig::HasSeedChanged()
{
	ICInstance instance = nsInternetConfig::GetInstance();
	if ( instance )
	{
		long newSeed = 0;
		::ICGetSeed( sInstance, &newSeed );
		if ( newSeed != sSeed )
		{
			sSeed = newSeed;
			return PR_TRUE;
		}
	}
	return PR_FALSE;
}

nsInternetConfig::nsInternetConfig()
{
	sRefCount++;
}

nsInternetConfig::~nsInternetConfig()
{
	sRefCount--;
	if ( sRefCount == 0 && sInstance)
	{
		::ICStop( sInstance );
		sInstance = NULL;
	}
}