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/* ---------------------------------------------------------------------------
Nullsoft Database Engine
--------------------
codename: Near Death Experience
--------------------------------------------------------------------------- */
/* ---------------------------------------------------------------------------
IndexRecord Class
--------------------------------------------------------------------------- */
#include "IndexRecord.h"
#include "../nde.h"
#include <stdio.h>
IndexRecord::IndexRecord(int RecordPos, int insertionPoint, VFILE *TableHandle, Table *ParentTable)
{
InsertionPoint = insertionPoint;
if (RecordPos != 0)
{
int n=0;
uint32_t ThisPos = RecordPos;
while (ThisPos)
{
if (n >= 128)
break;
Vfseek(TableHandle, ThisPos, SEEK_SET);
Field Entry (ThisPos);
Field *TypedEntry = Entry.ReadField(ParentTable, ThisPos, &ThisPos);
if (!TypedEntry) break; // some db error?
AddField(TypedEntry);
// ThisPos = TypedEntry->GetNextFieldPos();
n++;
}
}
}
void IndexRecord::BuildCollaboration()
{
for (FieldList::iterator itr=Fields.begin();itr!=Fields.end();itr++)
{
IndexField *p = (IndexField *)*itr;
if (p->next)
p->index->Colaborate((IndexField *)p->next);
else
p->index->Colaborate((IndexField *)*Fields.begin());
}
}
bool IndexRecord::NeedFix()
{
for (FieldList::iterator itr=Fields.begin();itr!=Fields.end();itr++)
{
IndexField *p = (IndexField *)*itr;
if (p->index->NeedFix())
return true;
}
return false;
}
IndexField *IndexRecord::GetIndexByName(const char *name)
{
for (FieldList::iterator itr=Fields.begin();itr!=Fields.end();itr++)
{
IndexField *p = (IndexField *)*itr;
if (!strcasecmp(p->GetIndexName(), name))
return p;
}
return NULL;
}
bool IndexRecord::CheckIndexing(int v)
{
int i = v;
for (FieldList::iterator itr=Fields.begin();itr!=Fields.end();itr++)
{
IndexField *p = (IndexField *)*itr;
v = p->index->GetCooperative(v);
}
return v == i;
}
Field *RecordBase::GetField(unsigned char ID)
{
for (FieldList::iterator itr=Fields.begin();itr!=Fields.end();itr++)
{
IndexField *p = (IndexField *)*itr;
if (p->GetFieldId() == ID)
return p;
}
return NULL;
}
void RecordBase::AddField(Field *field)
{
if (!field) return;
if (GetField(field->ID))
return;
Fields.push_back(field);
}
int IndexRecord::WriteFields(Table *ParentTable)
{
Field *previous = 0;
for (FieldList::iterator itr=Fields.begin();itr!=Fields.end();itr++)
{
IndexField *p = (IndexField *)*itr;
p->WriteField(ParentTable, previous, (Field *)p->next);
previous = p;
}
return WriteIndex(ParentTable);
}
int IndexRecord::WriteIndex(Table *ParentTable)
{
int P=0;
if (!Fields.empty())
P=(*Fields.begin())->GetFieldPos();
return ParentTable->index->Update(INDEX_RECORD_NUM, P, this, false);
}
void RecordBase::RemoveField(Field *field)
{
if (!field)
return;
Fields.erase(field);
delete field;
}
void IndexRecord::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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