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| | ===Example aplication=== | | ===Example aplication=== |
| | | | |
| − | Below is source code for small console mode interpreter application:
| + | Sample small console mode interpreter application: |
| − | | + | [http://wiki.lazarus.freepascal.org/index.php/Pascal_Script_Examples] |
| − | <code>
| |
| − | program psce;
| |
| − | {$APPTYPE CONSOLE}
| |
| − | | |
| − | {$IFDEF FPC}
| |
| − | {$mode delphi}{$H+}
| |
| − | {$ENDIF}
| |
| − | | |
| − | uses
| |
| − | SysUtils,interfaces,Classes,Forms,uPSCompiler, uPSR_std, uPSC_std, uPSR_classes, uPSC_classes, uPSRuntime, uPSComponent,uPSDisassembly,
| |
| − | uPSR_dateutils,uPSC_dateutils,uPSC_forms,uPSR_forms,uPSC_controls,uPSR_controls,uPSR_dll,uPSC_dll;
| |
| − | | |
| − | type
| |
| − | TPSCE = class
| |
| − | protected
| |
| − | FScr: TPSScript;
| |
| − | procedure SaveCompiled(var Data : String);
| |
| − | procedure SaveDissasembly(var Data : String);
| |
| − | procedure OnCompile(Sender: TPSScript);
| |
| − | procedure OnExecImport(Sender: TObject; se: TPSExec; x: TPSRuntimeClassImporter);
| |
| − | public
| |
| − | constructor Create;
| |
| − | destructor Destroy; override;
| |
| − | function Compile(const FileName: string): Boolean;
| |
| − | function Execute: Boolean;
| |
| − | end;
| |
| − | | |
| − | | |
| − | var
| |
| − | aPSCE: TPSCE;
| |
| − | SFile,Data : String;
| |
| − | | |
| − | | |
| − | procedure MWritedt(d : TDateTime);
| |
| − | var
| |
| − | s : String;
| |
| − | begin
| |
| − | s := DateToStr(d) + ' ' + TimeToStr(d);
| |
| − | Write(s);
| |
| − | end;
| |
| − | | |
| − | | |
| − | procedure MWrites(const s: string);
| |
| − | begin
| |
| − | Write(s);
| |
| − | end;
| |
| − | | |
| − | | |
| − | | |
| − | procedure MWritei(const i: Integer);
| |
| − | begin
| |
| − | Write(i);
| |
| − | end;
| |
| − | | |
| − | procedure MWrited(const d: Double);
| |
| − | begin
| |
| − | Write(d:0:1);
| |
| − | end;
| |
| − | | |
| − | procedure MWriteln;
| |
| − | begin
| |
| − | Writeln;
| |
| − | end;
| |
| − | | |
| − | procedure MVal(const s: string; var n, z: Integer);
| |
| − | begin
| |
| − | Val(s, n, z);
| |
| − | end;
| |
| − | | |
| − | constructor TPSCE.Create;
| |
| − | begin
| |
| − | FScr:=TPSScript.Create(nil);
| |
| − | FScr.OnCompile:= OnCompile;
| |
| − | FScr.OnExecImport := OnExecImport;
| |
| − | end;
| |
| − | | |
| − | destructor TPSCE.Destroy;
| |
| − | begin
| |
| − | FScr.Free;
| |
| − | end;
| |
| − | | |
| − | procedure TPSCE.SaveCompiled(var Data : String);
| |
| − | var
| |
| − | OutFile: string;
| |
| − | Fx : Longint ;
| |
| − | begin
| |
| − | OutFile := ExtractFilePath(ParamStr(0)) + ChangeFileExt(SFile,'.out');
| |
| − | Fx:= FileCreate(OutFile) ;
| |
| − | FileWrite(Fx,Data[1],Length(Data));
| |
| − | FileClose (Fx) ;
| |
| − | end;
| |
| − | | |
| − | procedure TPSCE.SaveDissasembly(var Data : String);
| |
| − | var
| |
| − | OutFile: string;
| |
| − | Fx : Longint ;
| |
| − | begin
| |
| − | OutFile := ExtractFilePath(ParamStr(0)) + ChangeFileExt(SFile,'.dis');
| |
| − | Fx:= FileCreate(OutFile) ;
| |
| − | FileWrite(Fx,Data[1],Length(Data));
| |
| − | FileClose (Fx) ;
| |
| − | end;
| |
| − | | |
| − | | |
| − | | |
| − | procedure TPSCE.OnExecImport(Sender: TObject; se: TPSExec; x: TPSRuntimeClassImporter);
| |
| − | begin
| |
| − | RIRegister_Std(x);
| |
| − | RIRegister_Classes(x,true);
| |
| − | RIRegister_Forms(x);
| |
| − | RIRegister_Controls(x);
| |
| − | RegisterDateTimeLibrary_R(se);
| |
| − | RegisterDLLRuntime(se);
| |
| − | end;
| |
| − | | |
| − | procedure TPSCE.OnCompile(Sender: TPSScript);
| |
| − | begin
| |
| − | RegisterDateTimeLibrary_C(Sender.Comp);
| |
| − | Sender.AddFunction(@MWrites, 'procedure Writes(const s: string)');
| |
| − | Sender.AddFunction(@MWritedt,'procedure WriteDT(d : TDateTime)');
| |
| − | Sender.AddFunction(@MWritei, 'procedure Writei(const i: Integer)');
| |
| − | Sender.AddFunction(@MWrited, 'procedure Writed(const f: Double)');
| |
| − | Sender.AddFunction(@MWriteln, 'procedure Writeln');
| |
| − | Sender.AddFunction(@MVal, 'procedure Val(const s: string; var n, z: Integer)');
| |
| − | SIRegister_Std(Sender.Comp);
| |
| − | SIRegister_Classes(Sender.Comp,true);
| |
| − | SIRegister_Forms(Sender.Comp);
| |
| − | SIRegister_Controls(Sender.Comp);
| |
| − | end;
| |
| − | | |
| − | function TPSCE.Compile(const FileName: string): Boolean;
| |
| − | var
| |
| − | S: TStringList;
| |
| − | i: Integer;
| |
| − | begin
| |
| − | Result:=False;
| |
| − | if FileExists(FileName) then begin
| |
| − | S:=TStringList.Create;
| |
| − | S.LoadFromFile(FileName);
| |
| − | FScr.Script:=S;
| |
| − | Result:=FScr.Compile;
| |
| − | S.Free;
| |
| − | if not Result then
| |
| − | if FScr.CompilerMessageCount > 0 then
| |
| − | for i:=0 to FScr.CompilerMessageCount-1 do
| |
| − | Writeln(FScr.CompilerErrorToStr(i));
| |
| − | end else Writeln('File not found: ', FileName);
| |
| − | end;
| |
| − | | |
| − | function TPSCE.Execute: Boolean;
| |
| − | begin
| |
| − | Result:=FScr.Execute;
| |
| − | if not Result then
| |
| − | Writeln('Run-time error:' + FScr.ExecErrorToString);
| |
| − | end;
| |
| − | | |
| − | | |
| − | | |
| − | | |
| − | begin
| |
| − | Application.Initialize;
| |
| − | aPSCE:=TPSCE.Create;
| |
| − | if ParamCount = 0 then
| |
| − | begin
| |
| − | Writeln('Usage: ', ExtractFileName(ParamStr(0)), ' [--compile|--dissasembly] <script.pss>');
| |
| − | Writeln('');
| |
| − | Writeln('--compile : Save compiled script bytecode');
| |
| − | Writeln('--dissasembly: Save dissasembly of script');
| |
| − | Exit;
| |
| − | end;
| |
| − |
| |
| − | SFile := ParamStr(1);
| |
| − | if (ParamStr(1)='--compile') or (ParamStr(1)='--dissasembly') then
| |
| − | begin
| |
| − | SFile := ParamStr(2);
| |
| − | aPSCE.Compile(SFile);
| |
| − | aPSCE.FScr.GetCompiled(Data);
| |
| − | if Paramstr(1)='--compile' then aPSCE.SaveCompiled(Data);
| |
| − | if Paramstr(1)='--dissasembly' then
| |
| − | begin
| |
| − | if not IFPS3DataToText(Data,Data) then Writeln('Cannot create dissasembly!')
| |
| − | else
| |
| − | aPSCE.SaveDissasembly(Data);
| |
| − | end;
| |
| − | Exit;
| |
| − | end;
| |
| − |
| |
| − | | |
| − | aPSCE.Compile(SFile);
| |
| − | aPSCE.Execute;
| |
| − | aPSCE.Free;
| |
| − | end.
| |
| − | | |
| − | | |
| − | | |
| − | </code>
| |
About
Pascal Script is an ObjectPascal/Delphi/Lazarus compatible interpreter with bytecode compiler.
It currently works in Windows and Linux on a 32-bit Intel processor.
It was created and is maintained by Carlo Kok and is copyrighted by RemObjects software as freeware with full source available.
The fix of few incompatibilities between ROPS (RemObjects Pascal Script) and FreePascal 2.0.1 was made by Bogusław Brandys with a great help of many developers 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 + a few samples for Delphi (which may or may not work under FreePascal+ Lazarus)
It is a work in progress.
This component is now designed for cross-platform applications, however limited to 32-bit Intel platform only. I'd like to make it work on PowerPC and 64-bit architectures someday.
Screenshot
Here are some screenshots how it looks under Lazarus:
under Linux
under Windows
License
BSD like, see full text.
Download
You can download beta releases for testing here: 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
- Unzip files into the directory
- 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 RemObjects.
Example aplication
Sample small console mode interpreter application:
[1]
