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| | See also this [http://www.remobjects.com/articles/?id={2FFC1EE9-F18D-4B11-9DE4-1BA0A79D0D04} article] from RemOjects. | | See also this [http://www.remobjects.com/articles/?id={2FFC1EE9-F18D-4B11-9DE4-1BA0A79D0D04} article] from RemOjects. |
| − |
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| − | ===The Example Application===
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| − | Below is example : small console mode pascal script compiler/interpreter:
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| − | <nowiki>
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| − | program psce;
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| − | {$APPTYPE CONSOLE}
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| − |
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| − | {$IFDEF FPC}
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| − | {$mode delphi}{$H+}
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| − | {$ENDIF}
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| − |
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| − | uses
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| − | SysUtils,interfaces,Classes,Forms,uPSCompiler, uPSR_std, uPSC_std, uPSR_classes, uPSC_classes, uPSRuntime, uPSComponent,uPSDisassembly,
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| − | uPSR_dateutils,uPSC_dateutils,uPSC_forms,uPSR_forms,uPSC_controls,uPSR_controls,uPSR_dll,uPSC_dll;
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| − |
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| − | type
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| − | TPSCE = class
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| − | protected
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| − | FScr: TPSScript;
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| − | procedure SaveCompiled(var Data : String);
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| − | procedure SaveDissasembly(var Data : String);
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| − | procedure OnCompile(Sender: TPSScript);
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| − | procedure OnExecImport(Sender: TObject; se: TPSExec; x: TPSRuntimeClassImporter);
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| − | public
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| − | constructor Create;
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| − | destructor Destroy; override;
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| − | function Compile(const FileName: string): Boolean;
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| − | function Execute: Boolean;
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| − | end;
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| − |
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| − |
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| − | var
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| − | aPSCE: TPSCE;
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| − | SFile,Data : String;
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| − |
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| − |
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| − | procedure MWritedt(d : TDateTime);
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| − | var
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| − | s : String;
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| − | begin
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| − | s := DateToStr(d) + ' ' + TimeToStr(d);
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| − | Write(s);
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| − | end;
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| − |
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| − |
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| − | procedure MWrites(const s: string);
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| − | begin
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| − | Write(s);
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| − | end;
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| − |
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| − |
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| − |
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| − | procedure MWritei(const i: Integer);
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| − | begin
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| − | Write(i);
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| − | end;
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| − |
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| − | procedure MWrited(const d: Double);
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| − | begin
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| − | Write(d:0:1);
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| − | end;
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| − |
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| − | procedure MWriteln;
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| − | begin
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| − | Writeln;
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| − | end;
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| − |
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| − | procedure MVal(const s: string; var n, z: Integer);
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| − | begin
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| − | Val(s, n, z);
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| − | end;
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| − |
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| − | constructor TPSCE.Create;
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| − | begin
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| − | FScr:=TPSScript.Create(nil);
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| − | FScr.OnCompile:= OnCompile;
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| − | FScr.OnExecImport := OnExecImport;
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| − | end;
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| − |
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| − | destructor TPSCE.Destroy;
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| − | begin
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| − | FScr.Free;
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| − | end;
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| − |
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| − | procedure TPSCE.SaveCompiled(var Data : String);
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| − | var
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| − | OutFile: string;
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| − | Fx : Longint ;
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| − | begin
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| − | OutFile := ExtractFilePath(ParamStr(0)) + ChangeFileExt(SFile,'.out');
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| − | Fx:= FileCreate(OutFile) ;
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| − | FileWrite(Fx,Data[1],Length(Data));
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| − | FileClose (Fx) ;
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| − | end;
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| − |
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| − | procedure TPSCE.SaveDissasembly(var Data : String);
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| − | var
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| − | OutFile: string;
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| − | Fx : Longint ;
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| − | begin
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| − | OutFile := ExtractFilePath(ParamStr(0)) + ChangeFileExt(SFile,'.dis');
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| − | Fx:= FileCreate(OutFile) ;
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| − | FileWrite(Fx,Data[1],Length(Data));
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| − | FileClose (Fx) ;
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| − | end;
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| − |
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| − |
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| − |
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| − | procedure TPSCE.OnExecImport(Sender: TObject; se: TPSExec; x: TPSRuntimeClassImporter);
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| − | begin
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| − | RIRegister_Std(x);
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| − | RIRegister_Classes(x,true);
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| − | RIRegister_Forms(x);
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| − | RIRegister_Controls(x);
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| − | RegisterDateTimeLibrary_R(se);
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| − | RegisterDLLRuntime(se);
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| − | end;
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| − |
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| − | procedure TPSCE.OnCompile(Sender: TPSScript);
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| − | begin
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| − | RegisterDateTimeLibrary_C(Sender.Comp);
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| − | Sender.AddFunction(@MWrites, 'procedure Writes(const s: string)');
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| − | Sender.AddFunction(@MWritedt,'procedure WriteDT(d : TDateTime)');
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| − | Sender.AddFunction(@MWritei, 'procedure Writei(const i: Integer)');
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| − | Sender.AddFunction(@MWrited, 'procedure Writed(const f: Double)');
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| − | Sender.AddFunction(@MWriteln, 'procedure Writeln');
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| − | Sender.AddFunction(@MVal, 'procedure Val(const s: string; var n, z: Integer)');
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| − | SIRegister_Std(Sender.Comp);
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| − | SIRegister_Classes(Sender.Comp,true);
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| − | SIRegister_Forms(Sender.Comp);
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| − | SIRegister_Controls(Sender.Comp);
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| − | end;
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| − |
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| − | function TPSCE.Compile(const FileName: string): Boolean;
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| − | var
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| − | S: TStringList;
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| − | i: Integer;
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| − | begin
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| − | Result:=False;
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| − | if FileExists(FileName) then begin
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| − | S:=TStringList.Create;
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| − | S.LoadFromFile(FileName);
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| − | FScr.Script:=S;
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| − | Result:=FScr.Compile;
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| − | S.Free;
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| − | if not Result then
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| − | if FScr.CompilerMessageCount > 0 then
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| − | for i:=0 to FScr.CompilerMessageCount-1 do
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| − | Writeln(FScr.CompilerErrorToStr(i));
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| − | end else Writeln('File not found: ', FileName);
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| − | end;
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| − |
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| − | function TPSCE.Execute: Boolean;
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| − | begin
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| − | Result:=FScr.Execute;
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| − | if not Result then
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| − | Writeln('Run-time error:' + FScr.ExecErrorToString);
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| − | end;
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| − |
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| − |
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| − |
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| − |
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| − | begin
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| − | Application.Initialize;
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| − | aPSCE:=TPSCE.Create;
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| − | if ParamCount = 0 then
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| − | begin
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| − | Writeln('Usage: ', ExtractFileName(ParamStr(0)), ' [--compile|--dissasembly] <script.pss>');
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| − | Writeln('');
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| − | Writeln('--compile : Save compiled script bytecode');
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| − | Writeln('--dissasembly: Save dissasembly of script');
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| − | Exit;
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| − | end;
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| − |
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| − | SFile := ParamStr(1);
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| − | if (ParamStr(1)='--compile') or (ParamStr(1)='--dissasembly') then
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| − | begin
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| − | SFile := ParamStr(2);
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| − | aPSCE.Compile(SFile);
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| − | aPSCE.FScr.GetCompiled(Data);
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| − | if Paramstr(1)='--compile' then aPSCE.SaveCompiled(Data);
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| − | if Paramstr(1)='--dissasembly' then
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| − | begin
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| − | if not IFPS3DataToText(Data,Data) then Writeln('Cannot create dissasembly!')
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| − | else
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| − | aPSCE.SaveDissasembly(Data);
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| − | end;
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| − | Exit;
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| − | end;
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| − |
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| − |
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| − | aPSCE.Compile(SFile);
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| − | aPSCE.Execute;
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| − | aPSCE.Free;
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| − | end.
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| − | </nowiki>
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About
Pascal Script is Pascal/Delphi/Lazarus compatible interpreter with bytecode compiler.
It currently works on Windows and Linux 32-bit Intel platform processor.
It was created and is maintained by Carlo Kok and is copyrighted by RemObjects software as freeware with full source available.
Fix of few incompatibilities between ROPS (RemObjects Pascal Script) and FreePascal 2.0.1 has done by Bogusław Brandys with a great help of many peoples from #fpc and #lazarus-ide IRC channels . Thank You.
Its main caracteristics are :
- almost all Object Pascal syntax supported
- Delphi/Lazarus classes supported (however cannot be declared inside of script)
- can create fully workable GUI forms with components
- easily import new classes into script engine
The download contains the components package for Delphi (various versions) and Lazarus,and few samples for Delphi (which could or not work under FreePascal+ Lazarus)
It is work in progress.
This component is now designed for cross-platform applications, however limited to 32-bit Intel platform only. I'd like to see someday it works on PowerPC and 64-bit platforms.
Screenshot
Here are some screenshots how it looks under Lazarus:
File:?.png
License
BSD like, see full text.
Download
Here you can download beta releases for testing: Lazarus CCR Files page.
Change Log
Dependencies / System Requirements
Status: Beta
Issues:
Needs testing on Windows.
Needs testing on Linux.
Almost working ;-)
Installation
- Create the directory lazarus\components\pascalscript
- On this directory, unzip here the files
- Open lazarus
- Open the package pascalscript.lpk with Component/Open package file (.lpk)
- Click on Compile
- Click on Install
Usage
Drop the PascalScript component on a form and a few plugins. (TODO:finish)
See the example projects.
See also this article from RemOjects.
