/*
* Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of the License "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description: 
*
*/


#include <emulator.h>


extern "C" {

#include "cryptography_stubs.h"

FARPROC vector[MAX_ORDINAL+1];

void fill_vector(HINSTANCE aDll)
	{
	int i;
	for (i=1;i<=MAX_ORDINAL;i++)
		{
		vector[i] = GetProcAddress(aDll, (LPCSTR)i);
		}
	vector[0] = (FARPROC)1;		// initialised
	}

void init_vector()
	{
	__LOCK_HOST;		// prevent deadlock with EKA2 scheduler

	HINSTANCE instance;
	
	// Try for strong cryptography
	//
	instance = LoadLibraryA("strong_cryptography.dll"); 
	if (instance != NULL)
		{
		fill_vector(instance);
		return;
		}
		
	// Try for weak cryptography
	//
	instance = LoadLibraryA("weak_cryptography.dll"); 
	if (instance != NULL)
		{
		fill_vector(instance);
		return;
		}
	
	// die
	//
	OutputDebugStringA("Unable to load cryptography implementation");
	_asm int 3;
	}
	
__declspec(naked) void common_dispatch()
	{
	_asm cmp	dword ptr vector,0		// initialised?
	_asm jne  	call_though_vector
	_asm push	eax
	_asm push	ecx
	_asm push	edx
	_asm call	init_vector
	_asm pop	edx
	_asm pop 	ecx
	_asm pop 	eax
call_though_vector:
	_asm jmp	[vector+eax*4]
	}

}