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how to merge delphoi and matlab code

Posted on 2009-04-07
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what is the baset way to call delphi functions from matlab ? we use win2K and D7

our application has a Tcp interface, is there a corrsponding TCP Indy component in matlab ?
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Question by:BdLm
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Hypo earned 500 total points
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Hi,
I don't have access to matlab right now so I can't test this, but I think the best/only way is to compile your delphi functions into a library (dll), where you export the functions you want to use in matlab; then you import this library into your matlab project, and call the exported functions from your algorithms.

You should read this documentation about shared libraries for how you do this in matlab:
http://www.mathworks.com/access/helpdesk/help/techdoc/index.html?/access/helpdesk/help/techdoc/matlab_external/f23224dfi7.html&http://www.google.se/search?hl=sv&q=matlab+external+dll&meta=&aq=f&oq=matlab+external+dl

You should probably also read up on how to create libraries in delphi:
http://delphi.about.com/od/objectpascalide/a/dlldelphi.htm

Hopefully this is enough to get you started :)

regards
Hypo
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by:BdLm
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using the dlls from c++ I need the header files to import the functions.  Any good to to that with no /  little manual coding ?
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by:BdLm
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I think the dll way is a acceptable proposal, but now I failed building my first dll using a unit which has been used many time before, I think that unit is error free, but already when compiling the error happend
 
any idea for that error (i already used madshi)

library Project_dll32_interface;
 

{ Wichtiger Hinweis zur DLL-Speicherverwaltung: ShareMem muss sich in der

  ersten Unit der unit-Klausel der Bibliothek und des Projekts befinden (Projekt-

  Quelltext anzeigen), falls die DLL Prozeduren oder Funktionen exportiert, die

  Strings als Parameter oder Funktionsergebnisse übergeben. Das gilt für alle

  Strings, die von oder an die DLL übergeben werden -- sogar für diejenigen, die

  sich in Records und Klassen befinden. Sharemem ist die Schnittstellen-Unit zur

  Verwaltungs-DLL für gemeinsame Speicherzugriffe, BORLNDMM.DLL.

  Um die Verwendung von BORLNDMM.DLL zu vermeiden, können Sie String-

  Informationen als PChar- oder ShortString-Parameter übergeben. }
 
 

uses

  ShareMem,

  SysUtils,

  Types,

  Classes,

  Dialogs,

  addons in '..\code_shared_libraries\addons.pas',

  _excel_support in '..\code_shared_libraries\_excel_support.pas',

  Unit_vector in 'Unit_vector.pas',

  Unit_DBImageV2 in 'Unit_DBImageV2.pas',

  Unit_log in 'Unit_log.pas' {Form1},

  Unit_TStringList2 in 'Unit_TStringList2.pas',

  TStringList_registry in '..\code_shared_libraries\TStringList_registry.pas' {XMLFileListEditForm},

  IndyClientVersionDLL in 'IndyClientVersionDLL.pas';
 
 

 //  ImageLibraryUnit in '..\code_shared_libraries\ImageLibraryUnit.pas';
 
 

type       FPoint = record

               X: Real;

               Y: Real;

               end;
 
 

procedure DllMessage; export;

begin

  ShowMessage('DLL Version  0.1  Date 09.04.2009') ;

end;
 
 

procedure SetServerParameter(LL, UR : FPoint; ElementName : String;  Rotation:  Integer);  export;

var   i :  Integer;

begin

      //  xx := ll * UR;
 

     i := GetFileSize2(ElementName);

end;
 
 

function GetDLLName ( aVal :  ShortString) :  String;  export;

begin
 

      result := aVal + 'TESTDLL';
 

end;
 
 
 

exports
 

DllMessage         index 0  ,

SetServerParameter index 1  ,

GetDLLName         index 2  ;
 
 

{*******************************************************************************}
 

begin
 
 
 
 

end.

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by:BdLm
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idea with DLL is the best way ,
 
my dll trouble seem to be caused by a destroyed delphi project file , not sure
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