public void OpenIndex(long indexId, IndexFileInfo ci)
{
IndexFile ixf;
IxDict.TryGetValue(indexId, out ixf);
if (ixf == null)
{
var stream = Database.OpenFile(FileType.Index, indexId);
IxDict[indexId] = new IndexFile(stream, ci, Database, indexId);
}
}
public int LookupJumpId(string name)
{
int result;
if (JumpLookup.TryGetValue(name, out result))
{
return(result);
}
return(-1);
}
public int Lookup(string name) // Gets the number of a local variable, -1 if not declared.
{
int result;
if (LocalVarLookup.TryGetValue(name, out result))
{
return(result);
}
return(-1);
}
public IndexPage GetPage( long pageId )
{
IndexPage p;
PageMap.TryGetValue( pageId, out p );
if ( p == null )
{
var data = ReadPage( pageId );
p = ( 1 & data[0] ) == 0 ? new IndexPage( Inf, data, Database ) : new PageParent( Inf, data, Database );
p.PageId = pageId;
p.Saved = true;
PageMap[ pageId ] = p;
p.CheckPage();
}
return p;
}
Schema GetSchema( string name, bool mustExist, Exec e )
{
Schema result;
SchemaDict.TryGetValue( name, out result );
if ( result != null ) return result;
int id = ReadSchemaId( name );
if ( id < 0 )
{
if ( mustExist) e.Error( "Schema not found: " + name );
return null;
}
result = new Schema( name, id );
SchemaDict[ name ] = result;
return result;
}
byte [] GetBuffer( long bufferNum )
{
byte [] result;
if ( Buffers.TryGetValue( bufferNum, out result ) ) return result;
result = new byte[ BufferSize ];
Buffers[ bufferNum ] = result;
long pos = bufferNum << BufferShift;
if ( BaseStream.Position != pos ) BaseStream.Position = pos;
int i = 0;
while ( i < BufferSize )
{
int got = BaseStream.Read( result, i, BufferSize - i );
if ( got == 0 ) break;
i += got;
}
return result;
}
public TableExpression GetCachedTable( string name )
{
TableExpression result;
TableDict.TryGetValue( name, out result );
return result;
}
