----------------------------------------------------------------------------- -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- I N T E R F A C E S . C -- -- -- -- S p e c -- -- -- -- $Revision: 1.17 $ -- -- -- -- This specification is adapted 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 (C); lbits1 : constant := System.Parameters.long_bits - 1; -- 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 range -(2 ** lbits1) .. +(2 ** lbits1) - 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 parametrized 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; 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 : in char_array) return Boolean; function To_C (Item : in String; Append_Nul : in Boolean := True) return char_array; function To_Ada (Item : in char_array; Trim_Nul : in Boolean := True) return String; procedure To_C (Item : in String; Target : out char_array; Count : out size_t; Append_Nul : in Boolean := True); procedure To_Ada (Item : in char_array; Target : out String; Count : out Natural; Trim_Nul : in Boolean := True); ------------------------------------ -- Wide Character and Wide String -- ------------------------------------ type wchar_t is new Wide_Character; for wchar_t'Size use System.Parameters.wchar_t_bits; wide_nul : constant wchar_t := wchar_t'First; function To_C (Item : in Wide_Character) return wchar_t; function To_Ada (Item : in wchar_t) return Wide_Character; type wchar_array is array (size_t range <>) of aliased wchar_t; function Is_Nul_Terminated (Item : in wchar_array) return Boolean; function To_C (Item : in Wide_String; Append_Nul : in Boolean := True) return wchar_array; function To_Ada (Item : in wchar_array; Trim_Nul : in Boolean := True) return Wide_String; procedure To_C (Item : in Wide_String; Target : out wchar_array; Count : out size_t; Append_Nul : in Boolean := True); procedure To_Ada (Item : in wchar_array; Target : out Wide_String; Count : out Natural; Trim_Nul : in Boolean := True); Terminator_Error : exception; end Interfaces.C;
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