106 lines
2.5 KiB
Plaintext
106 lines
2.5 KiB
Plaintext
(*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License, Version 1.0 only
|
|
* (the "License"). You may not use this file except in compliance
|
|
* with the License.
|
|
*
|
|
* You can obtain a copy of the license at
|
|
* http://www.opensource.org/licenses/cddl1.php.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file at
|
|
* http://www.opensource.org/licenses/cddl1.php. If applicable,
|
|
* add the following below this CDDL HEADER, with the fields enclosed
|
|
* by brackets "[]" replaced with your own identifying * information:
|
|
* Portions Copyright [yyyy] [name of copyright owner]
|
|
*
|
|
* CDDL HEADER END
|
|
*
|
|
*
|
|
* Portions Copyright 2009 Andreas Schneider
|
|
*)
|
|
unit UResourceManager;
|
|
|
|
{$mode objfpc}{$H+}
|
|
|
|
interface
|
|
|
|
uses
|
|
Classes, SysUtils;
|
|
|
|
type
|
|
|
|
{ TResourceManager }
|
|
|
|
TResourceManager = class(TObject)
|
|
constructor Create(AFileName: string);
|
|
destructor Destroy; override;
|
|
protected
|
|
FFileStream: TFileStream;
|
|
FCount: Integer;
|
|
FLookupTable: array of Cardinal;
|
|
FCurrentResource: Integer;
|
|
FResourceStream: TMemoryStream;
|
|
public
|
|
function GetResource(AIndex: Integer): TStream;
|
|
end;
|
|
|
|
var
|
|
ResourceManager: TResourceManager;
|
|
|
|
implementation
|
|
|
|
{ TResourceManager }
|
|
|
|
constructor TResourceManager.Create(AFileName: string);
|
|
begin
|
|
inherited Create;
|
|
FFileStream := TFileStream.Create(AFileName, fmOpenRead or fmShareDenyWrite);
|
|
FFileStream.Position := 0;
|
|
FFileStream.Read(FCount, SizeOf(Integer));
|
|
SetLength(FLookupTable, FCount);
|
|
FFileStream.Read(FLookupTable[0], FCount * SizeOf(Cardinal));
|
|
FCurrentResource := -1;
|
|
end;
|
|
|
|
destructor TResourceManager.Destroy;
|
|
begin
|
|
FreeAndNil(FFileStream);
|
|
FreeAndNil(FResourceStream);
|
|
inherited Destroy;
|
|
end;
|
|
|
|
function TResourceManager.GetResource(AIndex: Integer): TStream;
|
|
var
|
|
size: Cardinal;
|
|
begin
|
|
if AIndex <> FCurrentResource then
|
|
begin
|
|
FFileStream.Position := FLookupTable[AIndex];
|
|
FResourceStream.Free;
|
|
FResourceStream := TMemoryStream.Create;
|
|
FFileStream.Read(size, SizeOf(Cardinal));
|
|
FResourceStream.CopyFrom(FFileStream, size);
|
|
FCurrentResource := AIndex;
|
|
end;
|
|
FResourceStream.Position := 0;
|
|
Result := FResourceStream;
|
|
end;
|
|
|
|
initialization
|
|
begin
|
|
ResourceManager := TResourceManager.Create(ChangeFileExt(ParamStr(0), '.dat'));
|
|
end;
|
|
|
|
finalization
|
|
begin
|
|
if ResourceManager <> nil then FreeAndNil(ResourceManager);
|
|
end;
|
|
|
|
end.
|
|
|