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Diffstat (limited to 'gcc/ada/libgnat/s-addima.adb')
| -rw-r--r-- | gcc/ada/libgnat/s-addima.adb | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/gcc/ada/libgnat/s-addima.adb b/gcc/ada/libgnat/s-addima.adb new file mode 100644 index 00000000000..8af30643fe2 --- /dev/null +++ b/gcc/ada/libgnat/s-addima.adb @@ -0,0 +1,72 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S Y S T E M . A D D R E S S _ I M A G E -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1992-2017, Free Software Foundation, Inc. -- +-- -- +-- GNAT is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 3, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- +-- or FITNESS FOR A PARTICULAR PURPOSE. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +with Ada.Unchecked_Conversion; + +function System.Address_Image (A : Address) return String is + + Result : String (1 .. 2 * Address'Size / Storage_Unit); + + type Byte is mod 2 ** 8; + for Byte'Size use 8; + + Hexdigs : + constant array (Byte range 0 .. 15) of Character := "0123456789ABCDEF"; + + type Bytes is array (1 .. Address'Size / Storage_Unit) of Byte; + for Bytes'Size use Address'Size; + + function To_Bytes is new Ada.Unchecked_Conversion (Address, Bytes); + + Byte_Sequence : constant Bytes := To_Bytes (A); + + LE : constant := Standard'Default_Bit_Order; + BE : constant := 1 - LE; + -- Set to 1/0 for True/False for Little-Endian/Big-Endian + + Start : constant Natural := BE * (1) + LE * (Bytes'Length); + Incr : constant Integer := BE * (1) + LE * (-1); + -- Start and increment for accessing characters of address string + + Ptr : Natural; + -- Scan address string + +begin + Ptr := Start; + for N in Bytes'Range loop + Result (2 * N - 1) := Hexdigs (Byte_Sequence (Ptr) / 16); + Result (2 * N) := Hexdigs (Byte_Sequence (Ptr) mod 16); + Ptr := Ptr + Incr; + end loop; + + return Result; + +end System.Address_Image; |