//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
void
Plug::InitializeClass()
{
Verify(!ConnectionEngineHeap);
ConnectionEngineHeap = gos_CreateMemoryHeap("ConnectionEngine");
Check_Pointer(ConnectionEngineHeap);
Verify(!DefaultData);
DefaultData =
new ClassData(
PlugClassID,
"Stuff::Plug",
RegisteredClass::DefaultData
);
Register_Object(DefaultData);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
DatabaseHandle::DatabaseHandle(
const char* filename,
bool read_only
)
{
//
//-----------------------------------------------------
// Create the database heap if it doesn't already exist
//-----------------------------------------------------
//
m_fileName = filename;
if (!Database::FilesOpened++)
Database_Heap = gos_CreateMemoryHeap("Database", 0);
gos_PushCurrentHeap(Database_Heap);
m_currentRecord = 0;
m_currentPointer = NULL;
m_dirtyFlag = false;
//
//--------------------------------------------
// If the file is read only, our job is simple
//--------------------------------------------
//
m_readOnly = read_only;
if (m_readOnly)
{
if (gos_DoesFileExist(filename))
{
FileStream::IsRedirected = false;
DWORD size;
m_handle =
gos_OpenMemoryMappedFile(
filename,
reinterpret_cast<BYTE**>(&m_dataBase),
&size
);
if (m_dataBase->m_tag != Database::e_Tag)
STOP(("Invalid database file \"%s\"", filename));
if (m_dataBase->m_version > Database::e_Version)
STOP(("Application must be recompiled to use database \"%s\"", filename));
m_baseAddress = reinterpret_cast<DWORD>(m_dataBase);
Check_Object(m_dataBase);
}
else
STOP(("Database \"%s\" does not exist", filename));
}
//
//-------------------------------------------------------------
// The file is not read only, so see if we load it or create it
//-------------------------------------------------------------
//
else
{
m_handle = NULL;
if (gos_DoesFileExist(filename))
{
DWORD size;
gos_GetFile(
filename,
reinterpret_cast<BYTE**>(&m_dataBase),
&size
);
FileStream::IsRedirected = false;
Check_Pointer(m_dataBase);
if (m_dataBase->m_tag != Database::e_Tag || m_dataBase->m_version > Database::e_Version || m_dataBase->m_version == 1)
{
gos_Free(m_dataBase);
PAUSE(("Bad database file! Press 'Continue' to rebuild", filename));
m_dataBase = new(gos_Malloc(sizeof(Database), Database_Heap)) Database;
m_baseAddress = 0;
}
else
{
m_baseAddress = reinterpret_cast<DWORD>(m_dataBase);
Check_Object(m_dataBase);
}
}
//
//------------------------------------------
// The file doesn't exist, so create it here
//------------------------------------------
//
else
{
m_dataBase = new(gos_Malloc(sizeof(Database), Database_Heap)) Database;
m_baseAddress = 0;
}
}
gos_PopCurrentHeap();
}
