Lisaac external C struct pointer and Enum

[Mildred Ki'Lya]

On 04/11/2010 04:09 PM, Xavier Oswald wrote:
> Hi there,
>
> Im working a lot on lisaac libs since 2 weeks.
>
> Im wondering how you handle C struct pointers...
>
> As an example, I have "My_struct* s;"
> and have some C functions handling this struct.
>   

Probably, you could create a prototype MY_STRUCT with:

Section Header

  + name := MY_STRUCT;
  - type := `My_Struct*`;

Then, you can directly put MY_STRUCT as a type for C externals:

Section Public

  - create <-
  (
    `malloc(sizeof(My_Struct))`:MY_STRUCT
  );

  - operation_on_my_struct <-
  (
    `operation_on_mt_struct(@Self)`
  );

Be careful not to put any + slot on MY_STRUCT, that could be dangerous.
> Im wondering what's the best way to have My_Struct as a Prototype or something
> else...
>
> What do you think ?
> BTW, what's your opinion about how to handle C enum ?
>
>   
What about C enums ?
These are just integer and integer constants ...

Section Header

  - name := Expanded C_ENUM;
  - type := `C_Enum`; // that's really an integer

Section Public

  - enum_1 <- `C_ENUM_ENUM_1`:C_ENUM;
  - enum_2 <- `C_ENUM_ENUM_2`:C_ENUM;
  - enum_3 <- `C_ENUM_ENUM_3`:C_ENUM;

Then, I suppose you simply have to compare with the strict equality
operator if your variable of type C_ENUM is equal to C_ENUM.enum_1 or
any other constant.

But you might want to test if it works better, still, I'm quite sure.

Mildred


-- 
Mildred Ki'Lya
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