hcl/lib2/h3.ads

58 lines
2.1 KiB
Ada

with System;
with System.Storage_Pools;
package H3 is
--pragma Pure; -- can be pure if not for System.Storage_Pools;
--pragma Preelabotrate;
--pragma Preelaborate(H3);
subtype Boolean is Standard.Boolean;
True: constant Boolean := (1 = 1);
False: constant Boolean := (1 /= 1);
subtype Natural is Standard.Natural;
subtype System_Rune is Standard.Wide_Character;
System_Byte_Bits: constant := System.Storage_Unit;
System_Word_Bits: constant := System.Word_Size;
System_Word_Bytes: constant := System_Word_Bits / System_Byte_Bits;
type System_Byte is mod 2 ** System_Byte_Bits;
for System_Byte'Size use System_Byte_Bits;
type System_Word is mod 2 ** System_Word_Bits;
--type System_Word is range 0 .. (2 ** System_Word_Bits) - 1;
for System_Word'Size use System_Word_Bits;
type System_Signed_Word is range -(2 ** (System_Word_Bits - 1)) ..
+(2 ** (System_Word_Bits - 1)) - 1;
for System_Signed_Word'Size use System_Word_Bits;
-- Don't include the max value of System_Word in System_Size.
-- It is not possible for a program to contain a single object of
-- this max value size. By keeping the last value one less than the max,
-- it prevents a value overrun issue in looping.
--type System_Size is new System_Word range 0 .. (2 ** System_Word_Bits) - 2;
subtype System_Size is System_Word range 0 .. (2 ** System_Word_Bits) - 2;
--subtype System_Index is System_Size range 0 .. (System_Size'Last - 1);
subtype System_Index is System_Size range (System_Size'First + 1) .. System_Size'Last;
subtype System_Zero_Or_One is System_Word range 0 .. 1;
subtype Root_Storage_Pool is System.Storage_Pools.Root_Storage_Pool;
type Storage_Pool_Pointer is access all Root_Storage_Pool'Class;
--Storage_Error: exception renames Standard.Storage_Error;
type System_Byte_Array is array(System_Index range<>) of System_Byte;
-- ---------------------------------------------------------------------
-- Utilities Functions
-- ---------------------------------------------------------------------
function Align (X: in System_Size; Y: in System_Size) return System_Size;
pragma Inline(Align);
Index_Error: exception;
end H3;