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/*
FALCON - Falcon advanced simple text evaluator.
FILE: dll_win.cpp
Implementation of windows specific DLL system
-------------------------------------------------------------------
Author: Giancarlo Niccolai
Begin: mar ago 3 2004
-------------------------------------------------------------------
(C) Copyright 2004: the FALCON developers (see list in AUTHORS file)
See LICENSE file for licensing details.
*/
// Must include also windows.h
#include <falcon/dll_win.h>
#include <falcon/memory.h>
#include <falcon/sys.h>
#include <falcon/path.h>
namespace Falcon
{
DllLoader_win::~DllLoader_win()
{
close();
}
bool DllLoader_win::open( const String &dll_name_fal )
{
if( m_module != NULL )
if ( ! FreeLibrary( m_module ) )
return false;
String dll_name = dll_name_fal;
Path::uriToWin( dll_name );
uint32 bufsize = dll_name.length() * sizeof( wchar_t ) + sizeof( wchar_t );
wchar_t *dll_name_wc = (wchar_t *) memAlloc( bufsize );
dll_name.toWideString( dll_name_wc, bufsize );
m_module = LoadLibraryW( dll_name_wc );
if ( m_module == NULL ) {
m_error = GetLastError();
if ( m_error == ERROR_CALL_NOT_IMPLEMENTED )
{
char *dll_name_c = (char *) dll_name_wc;
if( dll_name.toCString( dll_name_c, bufsize ) > 0 )
m_module = LoadLibrary( dll_name_c );
}
}
memFree( dll_name_wc );
if ( m_module == NULL )
{
m_error = GetLastError();
return false;
}
return true;
}
bool DllLoader_win::close()
{
if ( m_module != NULL ) {
if ( FreeLibrary( m_module ) ) {
m_module = NULL;
return true;
}
}
return false;
}
void DllLoader_win::assign( DllLoader_win &other )
{
if ( m_module != NULL )
close();
m_module = other.m_module;
other.m_module = NULL;
}
DllFunc DllLoader_win::getSymbol( const char *sym_name ) const
{
if ( m_module != NULL )
return DllFunc( (void*)GetProcAddress( m_module, (LPCSTR) sym_name ) );
return DllFunc( 0 );
}
bool DllLoader_win::isDllMark( char ch1, char ch2 )
{
if ( ch1 == 'M' && ch2 == 'Z' ) return true;
return false;
}
void DllLoader_win::getErrorDescription( String &descr ) const
{
LPVOID lpMsgBuf;
DWORD res = FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM,
0,
m_error,
LANG_USER_DEFAULT,
(LPTSTR) &lpMsgBuf,
0,
NULL
);
if ( res == 0 ) {
descr = "Impossible to retreive error description";
}
else
{
descr = (char *) lpMsgBuf;
// force to copy
descr.bufferize();
}
LocalFree(lpMsgBuf);
}
}
/* end of dll_win.cpp */
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