Common C type definitions

To better indicate their use and ensure code portability, some common C types have been redefined.

typedef     char                    aat_ascii;
typedef     unsigned char           aat_byte;
typedef     short int               aat_int16;
typedef     long int                aat_int32;
typedef     unsigned short int      aat_uint16;
typedef     unsigned long int       aat_word32;
typedef     short int               aat_bool;
enum        aat_bool
{
  aat_false False=0,
  aat_true True=1
};

In 64-bit applications, the definitions of aat_int32 and aat_word32 are different:

typedef     int                    aat_int32;
typedef     unsigned int           aat_word32;