pfwinmodule.cpp

PowerFish is a class library, intended to provide a broad functionality base for any application. Al

///////////////////////////////////////////////////////////////////////////////////////////////////
//
// PowerFish core library
// Copyright (C) 1997-2001 Camilla Drefvenborg <[e-mail]>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
///////////////////////////////////////////////////////////////////////////////////////////////////

#include <PfBase.h>
#include <PfTemplate.h>
#include <PfString.h>
#include <PfModule.h>

#include <windows.h>

#include "PfWinModule.h"

///////////////////////////////////////////////////////////////////////////////////////////////////

// PfWinModule constructors -----------------------------------------------------------------------

PfWinModule::PfWinModule(void)
{
	m_hModule = NULL;
}

PfWinModule::~PfWinModule(void)
{
	Free();
}

// PfWinModule methods ----------------------------------------------------------------------------

bool PfWinModule::Load(const char* szPathName)
{
	PFASSERT(szPathName);

	m_hModule = LoadLibrary(szPathName);
	if (!m_hModule)
		return false;

	// detect native module
	{
		unsigned int* pPowerFishModule = (unsigned int*) FindEntryPoint("PowerFishModule");
		if (pPowerFishModule && *pPowerFishModule == __POWERFISH_VERSION__)
		{
			PFGETMODULENAME PfGetModuleName = (PFGETMODULENAME) FindEntryPoint("PfGetModuleName");
			if (PfGetModuleName)
				m_Name = PfGetModuleName();
		}
	}

	return true;
}

void PfWinModule::Free(void)
{
	if (m_hModule)
	{
		FreeLibrary(m_hModule);
		m_hModule = NULL;

		m_Name.Destroy();
	}
}

// PfWinModule interface methods ------------------------------------------------------------------

void* PfWinModule::FindEntryPoint(const char* szName)
{
	PFASSERT(szName);

	if (!m_hModule)
		return NULL;

	return GetProcAddress(m_hModule, szName);
}

// PfWinModule accessors --------------------------------------------------------------------------

bool PfWinModule::IsLoaded(void) const
{
	return m_hModule != NULL;
}

// PfWinModule interface accessors ----------------------------------------------------------------

bool PfWinModule::IsNative(void) const
{
	return m_Name.IsValid();
}

const char* PfWinModule::GetName(void) const
{
	return m_Name;
}

///////////////////////////////////////////////////////////////////////////////////////////////////

PfModule* PfLoadModule(const char* szPathName)
{
	PfWinModule* pModule = new PfWinModule();

	if (!pModule->Load(szPathName))
	{
		delete pModule;
		pModule = NULL;

		return NULL;
	}

	return pModule;
}

///////////////////////////////////////////////////////////////////////////////////////////////////