Oxygen Basic

Programming => Problems & Solutions => Topic started by: Alex_Longard on January 15, 2015, 07:49:28 AM

Title: What translate c++ code to oxygen?
Post by: Alex_Longard on January 15, 2015, 07:49:28 AM

This code from "reaper_plugin.h"
I don't know how to write entrypoint from calling dlls.

Code: [Select]

#define REAPER_PLUGIN_DLL_EXPORT __declspec(dllexport)
#define REAPER_PLUGIN_HINSTANCE HINSTANCE

#define REAPER_PLUGIN_DLL_EXPORT __attribute__((visibility("default")))
#define REAPER_PLUGIN_HINSTANCE void *

#define REAPER_PLUGIN_ENTRYPOINT ReaperPluginEntry
#define REAPER_PLUGIN_ENTRYPOINT_NAME "ReaperPluginEntry"

Help please!!!

Title: Re: What translate c++ code to oxygen?
Post by: Charles Pegge on January 15, 2015, 11:11:42 AM

Hi Alex,

Oxygen can read that part of the header.

What does the rest look like?

Title: Re: What translate c++ code to oxygen?
Post by: Alex_Longard on January 15, 2015, 11:32:12 AM

Hi Charles!
This code have oop-classes
Headers and simple source in attached archive.

.

Title: Re: What translate c++ code to oxygen?
Post by: Charles Pegge on January 16, 2015, 11:16:03 PM

Hi Alex, I am extending Oxygen to understand 'virtual' methods, as presented in the Reaper headers.

This appears to be the only safe class interfacing technique that is inter-operable between different C++ compilers.

Helpful reference:

HowTo: Export C++ classes from a DLL

http://www.codeproject.com/Articles/28969/HowTo-Export-C-classes-from-a-DLL

Title: Re: What translate c++ code to oxygen?
Post by: Alex_Longard on January 17, 2015, 01:13:54 AM

Hi Charles!
Thanks from article.
My problem is in terms of oxygen that he wrote in the first message.

Title: Re: What translate c++ code to oxygen?
Post by: Charles Pegge on January 18, 2015, 12:06:20 AM

Oxygen Update supporting c++ 'virtual' syntax
http://www.oxygenbasic.org/o2zips/Oxygen.zip

Class Library with virtual interface (and gratuitous curly braces :) )

Foo Example

Class Library Side: (DLL)

Code: OxygenBasic

1. % filename "foo.dll"
2. % dll
3. includepath "$inc/"
4. include     "RTL32.inc"
5.  
6. extern export
7.  
8. class FooClass
9. {
10.   int GetValue()
11.   {
12.    return 42
13.   }
14.   void Release()
15.   {
16.     if @this then freememory @this
17.   }
18. }
19.  
20. FooClass* FooObject() 'CLASS FACTORY FUNCTION
21. {
22.  FooClass foo at getmemory sizeof FooClass
23.  ? foo = @FooClass_Table 'ASSIGN METHODS TABLE POINTER
24. return @foo
25. }
26.  
27. end extern
28.  

Client Side

Code: OxygenBasic

1. extern pure virtual lib "foo.dll"
2. class FooClass
3. {
4.   virtual int  GetValue()=0
5.   virtual void Release()=0
6. }
7.  
8. FooClass* FooObject() 'CLASS FACTORY
9.  
10. end extern
11.  
12. void main()
13. {
14.   FooClass *foo = FooObject
15.   print foo.GetValue
16.   foo.Release
17. }
18. main
19.  

A more Basic style:

Code: OxygenBasic

1. 'CLIENT SIDE, BASIC STYLE
2. '========================
3.  
4. extern pure virtual lib "foo.dll"
5. class FooClass
6.   method  GetValue() as int
7.   method Release()
8. end class
9.  
10. declare FooObject() as FooClass*
11.  
12. end extern
13.  
14. FooClass *foo = FooObject
15. print foo.GetValue
16. foo.Release
17.  

Title: Re: What translate c++ code to oxygen?
Post by: Alex_Longard on January 18, 2015, 03:28:55 AM

Hi Charles,
very thanks!!!
I don't quite understand OOP, when he taught C++ does not think that will be useful in the future.

You will be adding new features in the help file?