gcc/ada/1ic.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                         I N T E R F A C E S . C                          --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 -- This specification is adapted from the Ada Reference Manual for use with --
  10 -- GNAT  Hi Integrity Edition.  In accordance  with the  copyright of  that --
  11 -- document,  you can  freely copy and modify this specification,  provided --
  12 -- that if you  redistribute a modified version,  any changes that you have --
  13 -- made are clearly indicated.                                              --
  14 --                                                                          --
  15 ------------------------------------------------------------------------------
  16
  17 --  This version contains only the type definitions for standard interfacing
  18 --  with C. All functions have been removed from the original spec.
  19
  20 package Interfaces.C is
  21 pragma Pure (C);
  22
  23    --  Declaration's based on C's <limits.h>
  24
  25    CHAR_BIT  : constant := 8;
  26    SCHAR_MIN : constant := -128;
  27    SCHAR_MAX : constant := 127;
  28    UCHAR_MAX : constant := 255;
  29
  30    --  Signed and Unsigned Integers. Note that in GNAT, we have ensured that
  31    --  the standard predefined Ada types correspond to the standard C types
  32
  33    type int   is new Integer;
  34    type short is new Short_Integer;
  35    type long  is new Long_Integer;
  36
  37    type signed_char is range SCHAR_MIN .. SCHAR_MAX;
  38    for signed_char'Size use CHAR_BIT;
  39
  40    type unsigned       is mod 2 ** int'Size;
  41    type unsigned_short is mod 2 ** short'Size;
  42    type unsigned_long  is mod 2 ** long'Size;
  43
  44    type unsigned_char is mod (UCHAR_MAX + 1);
  45    for unsigned_char'Size use CHAR_BIT;
  46
  47    subtype plain_char is unsigned_char;
  48
  49    type ptrdiff_t is
  50      range -(2 ** (Standard'Address_Size - 1)) ..
  51            +(2 ** (Standard'Address_Size - 1) - 1);
  52
  53    type size_t is mod 2 ** Standard'Address_Size;
  54
  55    --  Floating-Point
  56
  57    type C_float     is new Float;
  58    type double      is new Standard.Long_Float;
  59    type long_double is new Standard.Long_Long_Float;
  60
  61    ----------------------------
  62    -- Characters and Strings --
  63    ----------------------------
  64
  65    type char is new Character;
  66
  67    nul : constant char := char'First;
  68
  69    type char_array is array (size_t range <>) of aliased char;
  70    for char_array'Component_Size use CHAR_BIT;
  71
  72    ------------------------------------
  73    -- Wide Character and Wide String --
  74    ------------------------------------
  75
  76    type wchar_t is new Wide_Character;
  77    for wchar_t'Size use Standard'Wchar_T_Size;
  78
  79    wide_nul : constant wchar_t := wchar_t'First;
  80
  81    type wchar_array is array (size_t range <>) of aliased wchar_t;
  82
  83 end Interfaces.C;