------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- S Y S T E M . B Y T E _ S W A P P I N G -- -- -- -- S p e c -- -- -- -- Copyright (C) 2006-2018, 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 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 -- -- . -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- Intrinsic routines for byte swapping. These are used by the expanded code -- (supporting alternative byte ordering), and by the GNAT.Byte_Swapping run -- time package which provides user level routines for byte swapping. package System.Byte_Swapping is pragma Pure; type U16 is mod 2**16; type U32 is mod 2**32; type U64 is mod 2**64; function Bswap_16 (X : U16) return U16; pragma Import (Intrinsic, Bswap_16, "__builtin_bswap16"); function Bswap_32 (X : U32) return U32; pragma Import (Intrinsic, Bswap_32, "__builtin_bswap32"); function Bswap_64 (X : U64) return U64; pragma Import (Intrinsic, Bswap_64, "__builtin_bswap64"); end System.Byte_Swapping;