49c041e306
2005-11-14 Robert Dewar <dewar@adacore.com> * s-stoele.adb: Fix code for Address mod Storage_Offset for negative offset values From-SVN: r107010
91 lines
4.1 KiB
Ada
91 lines
4.1 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- S Y S T E M . S T O R A G E _ E L E M E N T S --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2005, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING. If not, write --
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-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
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-- Boston, MA 02110-1301, USA. --
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-- --
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-- As a special exception, if other files instantiate generics from this --
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-- unit, or you link this unit with other files to produce an executable, --
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-- this unit does not by itself cause the resulting executable to be --
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-- covered by the GNU General Public License. This exception does not --
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-- however invalidate any other reasons why the executable file might be --
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-- covered by the GNU Public License. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with Unchecked_Conversion;
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package body System.Storage_Elements is
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pragma Suppress (All_Checks);
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function To_Address is new Unchecked_Conversion (Storage_Offset, Address);
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function To_Offset is new Unchecked_Conversion (Address, Storage_Offset);
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-- Address arithmetic
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function "+" (Left : Address; Right : Storage_Offset) return Address is
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begin
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return To_Address (To_Integer (Left) + To_Integer (To_Address (Right)));
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end "+";
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function "+" (Left : Storage_Offset; Right : Address) return Address is
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begin
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return To_Address (To_Integer (To_Address (Left)) + To_Integer (Right));
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end "+";
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function "-" (Left : Address; Right : Storage_Offset) return Address is
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begin
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return To_Address (To_Integer (Left) - To_Integer (To_Address (Right)));
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end "-";
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function "-" (Left, Right : Address) return Storage_Offset is
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begin
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return To_Offset (To_Address (To_Integer (Left) - To_Integer (Right)));
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end "-";
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function "mod"
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(Left : Address;
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Right : Storage_Offset) return Storage_Offset
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is
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begin
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if Right >= 0 then
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return Storage_Offset
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(To_Integer (Left) mod Integer_Address (Right));
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else
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return -Storage_Offset
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((-To_Integer (Left)) mod Integer_Address (-Right));
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end if;
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end "mod";
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-- Conversion to/from integers
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function To_Address (Value : Integer_Address) return Address is
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begin
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return Address (Value);
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end To_Address;
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function To_Integer (Value : Address) return Integer_Address is
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begin
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return Integer_Address (Value);
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end To_Integer;
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end System.Storage_Elements;
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