------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- I N T E R F A C E S . C -- -- -- -- S p e c -- -- -- -- This specification is derived from the Ada Reference Manual for use with -- -- GNAT. In accordance with the copyright of that document, you can freely -- -- copy and modify this specification, provided that if you redistribute a -- -- modified version, any changes that you have made are clearly indicated. -- -- -- ------------------------------------------------------------------------------ with System.Parameters; package Interfaces.C is pragma Pure; -- Declaration's based on C's <limits.h> CHAR_BIT : constant := 8; SCHAR_MIN : constant := -128; SCHAR_MAX : constant := 127; UCHAR_MAX : constant := 255; -- Signed and Unsigned Integers. Note that in GNAT, we have ensured that -- the standard predefined Ada types correspond to the standard C types -- Note: the Integer qualifications used in the declaration of type long -- avoid ambiguities when compiling in the presence of s-auxdec.ads and -- a non-private system.address type. type int is new Integer; type short is new Short_Integer; type long is range -(2 ** (System.Parameters.long_bits - Integer'(1))) .. +(2 ** (System.Parameters.long_bits - Integer'(1))) - 1; type signed_char is range SCHAR_MIN .. SCHAR_MAX; for signed_char'Size use CHAR_BIT; type unsigned is mod 2 ** int'Size; type unsigned_short is mod 2 ** short'Size; type unsigned_long is mod 2 ** long'Size; type unsigned_char is mod (UCHAR_MAX + 1); for unsigned_char'Size use CHAR_BIT; subtype plain_char is unsigned_char; -- ??? should be parameterized -- Note: the Integer qualifications used in the declaration of ptrdiff_t -- avoid ambiguities when compiling in the presence of s-auxdec.ads and -- a non-private system.address type. type ptrdiff_t is range -(2 ** (System.Parameters.ptr_bits - Integer'(1))) .. +(2 ** (System.Parameters.ptr_bits - Integer'(1)) - 1); type size_t is mod 2 ** System.Parameters.ptr_bits; -- For convenience, also provide an uintptr_t type type uintptr_t is mod 2 ** System.Parameters.ptr_bits; ---------------------------- -- Characters and Strings -- ---------------------------- type char is new Character; nul : constant char := char'First; function To_C (Item : Character) return char; function To_Ada (Item : char) return Character; type char_array is array (size_t range <>) of aliased char; for char_array'Component_Size use CHAR_BIT; function Is_Nul_Terminated (Item : char_array) return Boolean; end Interfaces.C;