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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#ifndef _SYMBOL_LOADER_HXX
#define _SYMBOL_LOADER_HXX
#if defined( WNT )
# include <windows.h>
# include <winreg.h>
#endif
#include <iostream>
#include <osl/module.h>
#include <rtl/ustring.hxx>
#define SYM_MAP(a) { #a, (SymbolFunc *)&a }
typedef void (*SymbolFunc) (void);
struct ApiMap
{
const char *symName;
SymbolFunc *refValue;
};
namespace
{
#if defined( UNX )
const char LibName[] = "libvlc.so.5";
#elif defined( MACOS )
const char LibName[] = "/Applications/VLC.app/Contents/MacOS/lib/libvlc.dylib";
#elif defined( WNT )
const char LibName[] = "libvlc.dll";
OUString GetVLCPath()
{
HKEY hKey;
wchar_t arCurrent[MAX_PATH];
DWORD dwType, dwCurrentSize = sizeof( arCurrent );
if ( ::RegOpenKeyExW( HKEY_LOCAL_MACHINE, L"Software\\VideoLAN\\VLC",
0, KEY_READ, &hKey ) == ERROR_SUCCESS )
{
if ( ::RegQueryValueExW( hKey, L"InstallDir", NULL, &dwType, (LPBYTE) arCurrent, &dwCurrentSize ) == ERROR_SUCCESS &&
dwType == REG_SZ )
{
::RegCloseKey( hKey );
// The value might be 0-terminated or not
if (arCurrent[dwCurrentSize/2] == 0)
dwCurrentSize -= 2;
return OUString( arCurrent, dwCurrentSize ) + "/";
}
::RegCloseKey( hKey );
}
return OUString();
}
#endif
template<size_t N>
bool tryLink( oslModule &aModule, const ApiMap ( &pMap )[N] )
{
for (size_t i = 0; i < N; ++i)
{
SymbolFunc aMethod = ( SymbolFunc )osl_getFunctionSymbol
( aModule, OUString::createFromAscii( pMap[ i ].symName ).pData );
if ( !aMethod )
{
std::cerr << "Cannot load method " << pMap[ i ].symName << std::endl;
*pMap[ i ].refValue = NULL;
return false;
}
*pMap[ i ].refValue = aMethod;
}
return true;
}
}
namespace VLC
{
template<size_t N>
bool InitApiMap( const ApiMap ( &pMap )[N] )
{
#if defined( UNX ) || defined( MACOS )
const OUString& fullPath = OUString::createFromAscii(LibName);
#elif defined( WNT )
const OUString& fullPath = GetVLCPath() + OUString::createFromAscii(LibName);
#endif
oslModule aModule = osl_loadModule( fullPath.pData,
SAL_LOADMODULE_DEFAULT );
if( aModule == NULL)
{
std::cerr << "Cannot load libvlc" << std::endl;
return false;
}
if (tryLink( aModule, pMap ))
{
osl_unloadModule( aModule );
return true;
}
osl_unloadModule( aModule );
return false;
}
}
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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