extern declaration of functions in C-Header Files

[Daimonion]

Hi

For my actual project i want to use enterprise architect for designing my code architecture. I'm programming in C on an embedded controller (Microchip dsPIC33E 16Bit Controller)
In my architecture i develop with EA i'm using class diagramms and class- as well as interface structures.
And these interface structure  shall be exported via code generation as C-header files. Till now i managed to get exported anonymous typedef structures, datatypes, comments and all include specs. But i doesn't get it to work that the desired "extern" declaration is exported

Every operation is exported without the "extern" declaration.

My Question is. Which option/field/tag i have to set that the code generation generates the "extern" declaration? (For anonymous structures i had to create customer tags "anonymous" and "typedef" ans set it to true)

https://goo.gl/photos/RTCejAvF6AF4iXo97

[Uffe]

Hello, and welcome to the forum.

Please note that like most of us here I'm just another user, not a Sparx employee.

I had a quick look through the code generation templates for C, and it seems EA doesn't generate the "extern" keyword at all. I tried importing a header file with an extern declaration in it, and EA stored that as a tagged value "extern" with value "true" on the operation -- but it doesn't generate it back out again.

So it looks like you're going to have to go into the code generation templates. It's a bit fiddly, but not too hard.

Have a look at the Operation Declaration template. I'd put something like

Code: [Select]

%opTag:"extern" ? "extern" : ""%in there before %opReturnType%.

Haven't tested it, mind. But something along those lines ought to do it.
The corresponding help page is here.

HTH,


/Uffe

[Daimonion]

Thnanks for your respond and the hint to the operation template.

I thought that i couldn't change the behaviour of the list macro. now i know that they just call another template where i can change the output. *thumbsUp* Your Example works fine here and i even got it more complex that i can write an extern stereotype!

Regards
Daimonion