Re: Interface with C codes

[Anh Vo <anhvofrcaus@gmail.com>]

On Friday, October 17, 2014 4:22:15 PM UTC-7, Anh Vo wrote:
> What Ada spec should be for the following C prototype where BOOT_PARAMS is a struct and responding Ada type is
>  
> 
> type Boot_Parameter_Type is
> 
>    record 
>       Boot_Dev : Interfaces.C.Strings.Chars_Ptr; 
>       -- ... 
>    end record;
> 
> pragma Convention (C, Boot_Parameter_Type);
>  
> 
> type Boot_Parameter_Type_Access is access Boot_Parameter_Type;
> 
> pragma Convention (C, Boot_Parameter_Type_Access);
>  
> typedef struct           /* BOOT_PARAMS */ 
>     { 
>     char bootDev [20];  /* boot device code */ 
>     * ... * 
>     } BOOT_PARAMS;
>   
> Note that I can not use Ada 2012 yet.
>  
> char *  bootStringToStruct (char * bootString,  BOOT_PARAMS * pBootParams); 
 
> Anh Vo

Should this one work?

function Boot_String_To_Type (
           Boot_String : Interfaces.C.Strings.chars_ptr;
           Boot_Params : Boot_Parameter_Type_Access) 
                             return Interfaces.C.Strings.chars_ptr;
pragma Import (C, Boot_String_To_Type, "bootStringToStruct");