void
GiST::Open(const char *filename)
{
if(IsOpen()) return;
store=CreateStore();
store->Open(filename);
if(!store->IsOpen()) return;
isOpen=1;
}
void
GiST::Create(const char *filename)
{
GiSTpage page;
if(IsOpen()) return;
store=CreateStore();
store->Create(filename);
if(!store->IsOpen()) return;
page=store->Allocate();
GiSTnode *node=NewNode(this);
node->Path().MakeRoot();
WriteNode(node);
delete node;
isOpen=1;
}
void MXTree::Open(const char *filename)
{
if (IsOpen()) {
return;
}
store = CreateStore();
store->Open(filename);
if (!store->IsOpen()) {
return;
}
isOpen = 1;
char *buf = new char[store->PageSize()];
memset(buf, 0, store->PageSize());
store->Read(GiSTRootPage, buf);
memcpy(&rootPage, buf, sizeof(int));
delete[] buf;
}
void MXTree::Create(const char *filename)
{
if (IsOpen()) {
return;
}
store = CreateStore();
store->Create(filename);
if (!store->IsOpen()) {
return;
}
store->Allocate(); // reserved for root pointer
rootPage = store->Allocate();
assert(rootPage == 1);
GiSTnode *node = NewNode(this);
node->Path().MakeRoot();
WriteNode(node);
delete node;
isOpen = 1;
}
void
GiST::Create (const char *filename)
{
if (IsOpen()) {
return;
}
store = CreateStore();
store->Create(filename);
if (!store->IsOpen()) { // create failed!
return;
}
store->Allocate(); // added by myself, reserved for root
store->Allocate();
GiSTnode *node = NewNode(this);
node->Path().MakeRoot();
WriteNode (node);
delete node;
isOpen = 1;
}
