Ada type in binding for C99 bool

Joel Sherrill joel.sherrill@oarcorp.com
Tue Sep 22 17:54:00 GMT 2009


Florian Weimer wrote:
> * Joel Sherrill:
>
>   
>> What is the proper type to use in an Ada binding
>> for a C method that returns a C99 bool?
>>     
>
> Whatever the answer is, it should be used to define Interfaces.C.Bool.
> (I don't know what GCC's options for representing _Bool are, sorry.)
>
>   
It appears to be unsigned char or at least sizeof(bool)=1
on the architectures I tried this test program on.

#include <stdbool.h>

bool x;
int s = sizeof(bool);

Unfortunately bool is defined to _Bool and that must be
something gcc recognizes.  I don't see it in .h files.

So I am only slightly more sure of it than you are. :)

--joel



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