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/* ---------------------------------------------------------------------------
Nullsoft Database Engine
--------------------
codename: Near Death Experience
--------------------------------------------------------------------------- */
/* ---------------------------------------------------------------------------
Record Class
--------------------------------------------------------------------------- */
//#include "record.h"
#include "../nde.h"
#include <stdio.h>
void RecordBase::Retain()
{
ref_count++;
}
void RecordBase::Release()
{
if (--ref_count == 0)
delete this;
}
RecordBase::RecordBase()
{
ref_count = 1;
InsertionPoint = 0;
}
//---------------------------------------------------------------------------
Record::Record(int RecordPos, int insertionPoint, VFILE *TableHandle, Table *ParentTable)
{
InsertionPoint = insertionPoint;
Record *columns = ParentTable->GetColumns();
int max=columns ? columns->Fields.size() : 128;
if (RecordPos != 0)
{
int n=0;
uint32_t ThisPos = RecordPos;
while (ThisPos)
{
if (n >= max)
break;
Vfseek(TableHandle, ThisPos, SEEK_SET);
Field Entry (ThisPos);
Field *TypedEntry = Entry.ReadField(ParentTable, ThisPos, &ThisPos);
if (!TypedEntry) break; // some db error?
AddField(TypedEntry);
n++;
}
}
}
//---------------------------------------------------------------------------
RecordBase::~RecordBase()
{
Fields.deleteAll();
}
ColumnField *Record::GetColumnByName(const char *name)
{
for (FieldList::iterator itr=Fields.begin();itr!=Fields.end();itr++)
{
ColumnField *p = (ColumnField *)*itr;
if (!strcasecmp(p->GetFieldName(), name))
return p;
}
return NULL;
}
//---------------------------------------------------------------------------
int Record::WriteFields(Table *ParentTable, int RecordIndex)
{
Field *previous = 0;
for (FieldList::iterator itr=Fields.begin();itr!=Fields.end();itr++)
{
Field *p = *itr;
p->WriteField(ParentTable, previous, (Field *)p->next);
previous = p;
}
return WriteIndex(ParentTable, RecordIndex);
}
//---------------------------------------------------------------------------
int Record::WriteIndex(Table *ParentTable, int RecordIndex)
{
int P=0;
if (RecordIndex == NEW_RECORD)
RecordIndex = ParentTable->index->Insert(InsertionPoint);
if (!Fields.empty())
{
Field *f = *Fields.begin();
P=f->GetFieldPos();
}
return ParentTable->index->Update(RecordIndex, P, this, FALSE);
}
//---------------------------------------------------------------------------
void Record::Delete(Table *ParentTable, int RecordIndex)
{
ParentTable->index->Delete(RecordIndex, ParentTable->index->Get(RecordIndex), this);
}
void Record::WalkFields(FieldsWalker callback, void *context)
{
if (callback)
{
for (FieldList::iterator itr=Fields.begin();itr!=Fields.end();itr++)
{
if (!callback(this, *itr, context))
break;
}
}
}
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