86 lines
3.6 KiB
Ada
86 lines
3.6 KiB
Ada
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------------------------------------------------------------------------------
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-- --
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-- GNAT LIBRARY COMPONENTS --
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-- --
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-- G N A T . C R C 3 2 --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 2001-2010, AdaCore --
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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 3, 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. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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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 Ada.Unchecked_Conversion;
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package body GNAT.CRC32 is
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------------
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-- Update --
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------------
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procedure Update (C : in out CRC32; Value : String) is
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begin
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for K in Value'Range loop
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Update (C, Value (K));
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end loop;
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end Update;
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procedure Update (C : in out CRC32; Value : Ada.Streams.Stream_Element) is
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function To_Char is new Ada.Unchecked_Conversion
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(Ada.Streams.Stream_Element, Character);
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V : constant Character := To_Char (Value);
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begin
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Update (C, V);
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end Update;
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procedure Update
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(C : in out CRC32;
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Value : Ada.Streams.Stream_Element_Array)
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is
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begin
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for K in Value'Range loop
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Update (C, Value (K));
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end loop;
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end Update;
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-----------------
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-- Wide_Update --
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-----------------
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procedure Wide_Update (C : in out CRC32; Value : Wide_Character) is
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subtype S2 is String (1 .. 2);
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function To_S2 is new Ada.Unchecked_Conversion (Wide_Character, S2);
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VS : constant S2 := To_S2 (Value);
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begin
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Update (C, VS (1));
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Update (C, VS (2));
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end Wide_Update;
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procedure Wide_Update (C : in out CRC32; Value : Wide_String) is
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begin
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for K in Value'Range loop
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Wide_Update (C, Value (K));
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end loop;
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end Wide_Update;
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end GNAT.CRC32;
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