void HeapFile::Add (Record& addme){
Page tempPage;
cout << "File length: " << f.GetLength() << endl;
if(0 != f.GetLength()){
f.GetPage(&tempPage, f.GetLength() - 2); //get the last page in the file
if(0 == tempPage.Append(&addme)){// the last page is full, add record to a new page and insert into the end of file
tempPage.EmptyItOut();
tempPage.Append(&addme);
f.AddPage(&tempPage, f.GetLength() - 1);
}else{// the last page is not full, add record into the last page.
f.AddPage(&tempPage, f.GetLength() - 2);
}
}else{ // This file is a new file with no page.
if(1 == tempPage.Append(&addme)) f.AddPage(&tempPage, 0);
else cout << "A new page is full. Can't insert record!" << endl;
}
}
void HeapFile::Load (Schema& myschema, char* loadpath){
FILE *table = fopen(loadpath, "r");
if( 0 == table) exit(-1);
Page tempPage;
Record tempRecord;
int recordCounter = 0;
int pageCounter = 0;
while(1 == tempRecord.SuckNextRecord(&myschema, table)){
assert(pageCounter >= 0);
assert(recordCounter >= 0);
recordCounter++;
if(recordCounter % 10000 == 0)
cout << "The toal number of record: " << recordCounter << endl;
//insert record into page until page is full and insert page into file
if(0 == tempPage.Append(&tempRecord)){ // tempPage is full
f.AddPage(&tempPage, pageCounter);
tempPage.EmptyItOut();
tempPage.Append(&tempRecord);
pageCounter++;
}
}
f.AddPage(&tempPage,pageCounter);// insert the last page into the file
cout<< "Read " << recordCounter << endl;
}
