// **********************************************************
// Add a new record to the page. Returns OK if everything went OK
// otherwise, returns DONE if sufficient space does not exist
// RID of the new record is returned via rid parameter.
Status HFPage::insertRecord(char* recPtr, int recLen, RID& rid)
{
// fill in the body
//--- check if does not have enough free Space ----
//--- get empty slot no ---
int emptySlotNo = getEmptySlotNo();
if((int)this->freeSpace < recLen + (int)sizeof(slot_t) && emptySlotNo == -1)
{
return MINIBASE_FIRST_ERROR(HEAPFILE, NO_SPACE);
//return DONE;
}
else if((int)this->freeSpace < recLen && emptySlotNo != -1)
{
return MINIBASE_FIRST_ERROR(HEAPFILE, NO_SPACE);
//return DONE;
}
else
{
//--- check if is the first record on page---
if(this->slotCnt == 0)
{
//--- modify RID value ----
rid.pageNo = this->curPage;
rid.slotNo = this->slotCnt;
//--- add new slot ----
modifySlot(0, recLen);
//--- add the record data into page ----
addData(0, recPtr, recLen);
//--- update HFpage info ---
this->slotCnt ++;
}
else
{
if(emptySlotNo == -1)
{
emptySlotNo = this->slotCnt;
this->slotCnt ++;
}
//--- modify RID value ---
rid.pageNo = this->curPage;
rid.slotNo = emptySlotNo;
//--- add new slot ----
modifySlot(emptySlotNo, recLen);
//--- add the record data into page ---
addData(emptySlotNo, recPtr, recLen);
}
//--- update HFpage info ---
this->usedPtr = this->usedPtr - recLen;
if(this->slotCnt == 1)
this->freeSpace = MAX_SPACE - DPFIXED - recLen;
else
this->freeSpace = this->usedPtr - (this->slotCnt - 1) * sizeof(slot_t);
return OK;
}
}
// **********************************************************
// Add a new record to the page. Returns OK if everything went OK
// otherwise, returns DONE if sufficient space does not exist
// RID of the new record is returned via rid parameter.
Status HFPage::insertRecord(char* recPtr, int recLen, RID& rid)
{
// fill in the body
//--- check if does not have enough free Space ----
if(this->freeSpace < recLen + sizeof(slot_t))
{
return DONE;
}
else
{
//--- check if is the first record on page---
if(this->slotCnt == 0)
{
//--- modify RID value ----
rid.pageNo = this->curPage;
rid.slotNo = this->slotCnt;
//--- add new slot ----
modifySlot(0, recLen);
//--- add the record data into page ----
addData(0, recPtr, recLen);
//--- update HFpage info ---
this->slotCnt ++;
}
else
{
//--- get empty slot no ---
int emptySlotNo = getEmptySlotNo();
if(emptySlotNo == -1)
{
emptySlotNo = this->slotCnt;
this->slotCnt ++;
}
//--- modify RID value ---
rid.pageNo = this->curPage;
rid.slotNo = emptySlotNo;
//--- add new slot ----
modifySlot(emptySlotNo, recLen);
//--- add the record data into page ---
addData(emptySlotNo, recPtr, recLen);
}
//--- update HFpage info ---
this->usedPtr = this->usedPtr - recLen;
this->freeSpace = this->freeSpace - recLen;
return OK;
}
}
