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Diffstat (limited to 'gcc/ada/g-crc32.adb')
| -rw-r--r-- | gcc/ada/g-crc32.adb | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/gcc/ada/g-crc32.adb b/gcc/ada/g-crc32.adb new file mode 100644 index 0000000..e7ed74c --- /dev/null +++ b/gcc/ada/g-crc32.adb @@ -0,0 +1,92 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT LIBRARY COMPONENTS -- +-- -- +-- G N A T . C R C 3 2 -- +-- -- +-- B o d y -- +-- -- +-- $Revision$ +-- -- +-- Copyright (C) 2001 Ada Core Technologies, 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 2, 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. See the GNU General Public License -- +-- for more details. You should have received a copy of the GNU General -- +-- Public License distributed with GNAT; see file COPYING. If not, write -- +-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- +-- MA 02111-1307, USA. -- +-- -- +-- As a special exception, if other files instantiate generics from this -- +-- unit, or you link this unit with other files to produce an executable, -- +-- this unit does not by itself cause the resulting executable to be -- +-- covered by the GNU General Public License. This exception does not -- +-- however invalidate any other reasons why the executable file might be -- +-- covered by the GNU Public License. -- +-- -- +-- GNAT is maintained by Ada Core Technologies Inc (http://www.gnat.com). -- +-- -- +------------------------------------------------------------------------------ + +with Unchecked_Conversion; + +package body GNAT.CRC32 is + + ------------ + -- Update -- + ------------ + + procedure Update (C : in out CRC32; Value : String) is + begin + for K in Value'Range loop + Update (C, Value (K)); + end loop; + end Update; + + procedure Update (C : in out CRC32; Value : Ada.Streams.Stream_Element) is + function To_Char is new Unchecked_Conversion + (Ada.Streams.Stream_Element, Character); + + V : constant Character := To_Char (Value); + + begin + Update (C, V); + end Update; + + procedure Update + (C : in out CRC32; + Value : Ada.Streams.Stream_Element_Array) + is + begin + for K in Value'Range loop + Update (C, Value (K)); + end loop; + end Update; + + ----------------- + -- Wide_Update -- + ----------------- + + procedure Wide_Update (C : in out CRC32; Value : Wide_Character) is + subtype S2 is String (1 .. 2); + function To_S2 is new Unchecked_Conversion (Wide_Character, S2); + + VS : S2 := To_S2 (Value); + + begin + Update (C, VS (1)); + Update (C, VS (2)); + end Wide_Update; + + procedure Wide_Update (C : in out CRC32; Value : Wide_String) is + begin + for K in Value'Range loop + Wide_Update (C, Value (K)); + end loop; + end Wide_Update; + +end GNAT.CRC32; |