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/* ---------------------------------------------------------------------------
Nullsoft Database Engine
--------------------
codename: Near Death Experience
--------------------------------------------------------------------------- */
/* ---------------------------------------------------------------------------
IndexRecord Class
--------------------------------------------------------------------------- */
#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 ((itr + 1) != Fields.end())
p->index->Colaborate((IndexField *)(*(itr+1)));
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 wchar_t *name)
{
for (FieldList::iterator itr=Fields.begin();itr!=Fields.end();itr++)
{
IndexField *p = (IndexField *)*itr;
if (!_wcsicmp(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 *l_previous_field = NULL;
IndexField *l_index_field = NULL;
for ( FieldList::iterator itr = Fields.begin(); itr != Fields.end(); itr++ )
{
l_index_field = (IndexField *)(* itr);
Field* nextField = (itr + 1) != Fields.end() ? *(itr + 1) : nullptr;
//l_index_field->WriteField(ParentTable, l_previous_field, (Field*)l_index_field->next);
l_index_field->WriteField(ParentTable, l_previous_field, nextField);
l_previous_field = l_index_field;
}
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;
for (auto it = Fields.begin(); it != Fields.end(); it++)
{
Field* f = *it;
if (f == field)
{
Fields.erase(it);
delete f;
break;
}
}
}
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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