71e743ff03
git-svn-id: http://code.remobjects.com/svn/pascalscript@169 5c9d2617-0215-0410-a2ee-e80e04d1c6d8
89 lines
2.8 KiB
ObjectPascal
89 lines
2.8 KiB
ObjectPascal
program sample2;
|
|
|
|
uses
|
|
uPSCompiler,
|
|
uPSRuntime,
|
|
|
|
Dialogs
|
|
|
|
;
|
|
|
|
procedure MyOwnFunction(const Data: string);
|
|
begin
|
|
// Do something with Data
|
|
ShowMessage(Data);
|
|
end;
|
|
|
|
{$IFDEF UNICODE}
|
|
function ScriptOnUses(Sender: TPSPascalCompiler; const Name: AnsiString): Boolean;
|
|
{$ELSE}
|
|
function ScriptOnUses(Sender: TPSPascalCompiler; const Name: string): Boolean;
|
|
{$ENDIF}
|
|
|
|
{ the OnUses callback function is called for each "uses" in the script.
|
|
It's always called with the parameter 'SYSTEM' at the top of the script.
|
|
For example: uses ii1, ii2;
|
|
This will call this function 3 times. First with 'SYSTEM' then 'II1' and then 'II2'.
|
|
}
|
|
begin
|
|
if Name = 'SYSTEM' then
|
|
begin
|
|
Sender.AddDelphiFunction('procedure MyOwnFunction(Data: string)');
|
|
{ This will register the function to the script engine. Now it can be used from
|
|
within the script.}
|
|
|
|
Result := True;
|
|
end else
|
|
Result := False;
|
|
end;
|
|
|
|
procedure ExecuteScript(const Script: string);
|
|
var
|
|
Compiler: TPSPascalCompiler;
|
|
{ TPSPascalCompiler is the compiler part of the scriptengine. This will
|
|
translate a Pascal script into a compiled form the executer understands. }
|
|
Exec: TPSExec;
|
|
{ TPSExec is the executer part of the scriptengine. It uses the output of
|
|
the compiler to run a script. }
|
|
{$IFDEF UNICODE}Data: AnsiString;{$ELSE}Data: string;{$ENDIF}
|
|
begin
|
|
Compiler := TPSPascalCompiler.Create; // create an instance of the compiler.
|
|
Compiler.OnUses := ScriptOnUses; // assign the OnUses event.
|
|
if not Compiler.Compile(Script) then // Compile the Pascal script into bytecode.
|
|
begin
|
|
Compiler.Free;
|
|
// You could raise an exception here.
|
|
Exit;
|
|
end;
|
|
|
|
Compiler.GetOutput(Data); // Save the output of the compiler in the string Data.
|
|
Compiler.Free; // After compiling the script, there is no need for the compiler anymore.
|
|
|
|
Exec := TPSExec.Create; // Create an instance of the executer.
|
|
Exec.RegisterDelphiFunction(@MyOwnFunction, 'MYOWNFUNCTION', cdRegister);
|
|
{ This will register the function to the executer. The first parameter is a
|
|
pointer to the function. The second parameter is the name of the function (in uppercase).
|
|
And the last parameter is the calling convention (usually Register). }
|
|
|
|
if not Exec.LoadData(Data) then // Load the data from the Data string.
|
|
begin
|
|
{ For some reason the script could not be loaded. This is usually the case when a
|
|
library that has been used at compile time isn't registered at runtime. }
|
|
Exec.Free;
|
|
// You could raise an exception here.
|
|
Exit;
|
|
end;
|
|
|
|
Exec.RunScript; // Run the script.
|
|
Exec.Free; // Free the executer.
|
|
end;
|
|
|
|
|
|
|
|
const
|
|
Script = 'var s: string; begin s := ''Test''; S := s + ''ing;''; MyOwnFunction(s); end.';
|
|
|
|
begin
|
|
ExecuteScript(Script);
|
|
end.
|