diff options
Diffstat (limited to 'gcc-4.4.3/gcc/ada/g-crc32.ads')
| -rw-r--r-- | gcc-4.4.3/gcc/ada/g-crc32.ads | 113 |
1 files changed, 0 insertions, 113 deletions
diff --git a/gcc-4.4.3/gcc/ada/g-crc32.ads b/gcc-4.4.3/gcc/ada/g-crc32.ads deleted file mode 100644 index dac4c4278..000000000 --- a/gcc-4.4.3/gcc/ada/g-crc32.ads +++ /dev/null @@ -1,113 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT LIBRARY COMPONENTS -- --- -- --- G N A T . C R C 3 2 -- --- -- --- S p e c -- --- -- --- Copyright (C) 2004-2005, AdaCore -- --- -- --- 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, 51 Franklin Street, Fifth Floor, -- --- Boston, MA 02110-1301, 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 was originally developed by the GNAT team at New York University. -- --- Extensive contributions were provided by Ada Core Technologies Inc. -- --- -- ------------------------------------------------------------------------------- - --- This package provides routines for computing a commonly used checksum --- called CRC-32. This is a checksum based on treating the binary data --- as a polynomial over a binary field, and the exact specifications of --- the CRC-32 algorithm are as follows: - --- Name : "CRC-32" --- Width : 32 --- Poly : 04C11DB7 --- Init : FFFFFFFF --- RefIn : True --- RefOut : True --- XorOut : FFFFFFFF --- Check : CBF43926 - --- Note that this is the algorithm used by PKZip, Ethernet and FDDI - --- For more information about this algorithm see: - --- ftp://ftp.rocksoft.com/papers/crc_v3.txt - --- "A Painless Guide to CRC Error Detection Algorithms", Ross N. Williams - --- "Computation of Cyclic Redundancy Checks via Table Look-Up", Communications --- of the ACM, Vol. 31 No. 8, pp.1008-1013 Aug. 1988. Sarwate, D.V. - -with Ada.Streams; -with Interfaces; -with System.CRC32; - -package GNAT.CRC32 is - - subtype CRC32 is System.CRC32.CRC32; - -- Used to represent CRC32 values, which are 32 bit bit-strings - - procedure Initialize (C : out CRC32) - renames System.CRC32.Initialize; - -- Initialize CRC value by assigning the standard Init value (16#FFFF_FFFF) - - procedure Update - (C : in out CRC32; - Value : Character) - renames System.CRC32.Update; - -- Evolve CRC by including the contribution from Character'Pos (Value) - - procedure Update - (C : in out CRC32; - Value : String); - -- For each character in the Value string call above routine - - procedure Wide_Update - (C : in out CRC32; - Value : Wide_Character); - -- Evolve CRC by including the contribution from Wide_Character'Pos (Value) - -- with the bytes being included in the natural memory order. - - procedure Wide_Update - (C : in out CRC32; - Value : Wide_String); - -- For each character in the Value string call above routine - - procedure Update - (C : in out CRC32; - Value : Ada.Streams.Stream_Element); - -- Evolve CRC by including the contribution from Value - - procedure Update - (C : in out CRC32; - Value : Ada.Streams.Stream_Element_Array); - -- For each element in the Value array call above routine - - function Get_Value (C : CRC32) return Interfaces.Unsigned_32 - renames System.CRC32.Get_Value; - -- Get_Value computes the CRC32 value by performing an XOR with the - -- standard XorOut value (16#FFFF_FFFF). Note that this does not - -- change the value of C, so it may be used to retrieve intermediate - -- values of the CRC32 value during a sequence of Update calls. - - pragma Inline (Update); - pragma Inline (Wide_Update); -end GNAT.CRC32; |