| ----------------------------------------------------------------------------- |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- I N T E R F A C E S . C -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- $Revision: 1.1 $ |
| -- -- |
| -- This specification is adapted from the Ada Reference Manual for use with -- |
| -- GNAT Hi Integrity Edition. 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. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- This version contains only the type definitions for standard interfacing |
| -- with C. All functions have been removed from the original spec. |
| |
| package Interfaces.C is |
| pragma Pure (C); |
| |
| -- 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 |
| |
| type int is new Integer; |
| type short is new Short_Integer; |
| type long is new Long_Integer; |
| |
| 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; |
| |
| type ptrdiff_t is |
| range -(2 ** (Standard'Address_Size - 1)) .. |
| +(2 ** (Standard'Address_Size - 1) - 1); |
| |
| type size_t is mod 2 ** Standard'Address_Size; |
| |
| -- Floating-Point |
| |
| type C_float is new Float; |
| type double is new Standard.Long_Float; |
| type long_double is new Standard.Long_Long_Float; |
| |
| ---------------------------- |
| -- Characters and Strings -- |
| ---------------------------- |
| |
| type char is new Character; |
| |
| nul : constant char := char'First; |
| |
| type char_array is array (size_t range <>) of aliased char; |
| for char_array'Component_Size use CHAR_BIT; |
| |
| ------------------------------------ |
| -- Wide Character and Wide String -- |
| ------------------------------------ |
| |
| type wchar_t is new Wide_Character; |
| for wchar_t'Size use Standard'Wchar_T_Size; |
| |
| wide_nul : constant wchar_t := wchar_t'First; |
| |
| type wchar_array is array (size_t range <>) of aliased wchar_t; |
| |
| end Interfaces.C; |
