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Diffstat (limited to 'gcc-4.4.3/gcc/ada/s-crc32.ads')
| -rw-r--r-- | gcc-4.4.3/gcc/ada/s-crc32.ads | 85 |
1 files changed, 0 insertions, 85 deletions
diff --git a/gcc-4.4.3/gcc/ada/s-crc32.ads b/gcc-4.4.3/gcc/ada/s-crc32.ads deleted file mode 100644 index ec410c35f..000000000 --- a/gcc-4.4.3/gcc/ada/s-crc32.ads +++ /dev/null @@ -1,85 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT LIBRARY COMPONENTS -- --- -- --- S Y S T E M . C R C 3 2 -- --- -- --- S p e c -- --- -- --- Copyright (C) 2001-2009, 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. -- --- -- ------------------------------------------------------------------------------- - --- 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. - -pragma Warnings (Off); -pragma Compiler_Unit; -pragma Warnings (On); - -with Interfaces; - -package System.CRC32 is - - type CRC32 is new Interfaces.Unsigned_32; - -- Used to represent CRC32 values, which are 32 bit bit-strings - - procedure Initialize (C : out CRC32); - pragma Inline (Initialize); - -- Initialize CRC value by assigning the standard Init value (16#FFFF_FFFF) - - procedure Update - (C : in out CRC32; - Value : Character); - pragma Inline (Update); - -- Evolve CRC by including the contribution from Character'Pos (Value) - - function Get_Value (C : CRC32) return Interfaces.Unsigned_32; - pragma Inline (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. - -end System.CRC32; |