mirror of
https://develop.openfoam.com/Development/openfoam.git
synced 2025-11-28 03:28:01 +00:00
2c06a905ab
- Place common code under OSspecific. By including "endian.H", either one of WM_BIG_ENDIAN or WM_LITTLE_ENDIAN will be defined. Provides inline 32-bit and 64-bit byte swap routines that can be used/re-used elsewhere. The inplace memory swaps currently used by the VTK output are left for the moment pending further cleanup of that code.
135 lines
4.0 KiB
C++
135 lines
4.0 KiB
C++
/*---------------------------------------------------------------------------*\
|
|
========= |
|
|
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
|
|
\\ / O peration |
|
|
\\ / A nd | Copyright (C) 2016 OpenCFD Ltd.
|
|
\\/ M anipulation |
|
|
-------------------------------------------------------------------------------
|
|
License
|
|
This file is part of OpenFOAM.
|
|
|
|
OpenFOAM is free software: you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
|
|
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
|
|
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
Description
|
|
Help with architecture-specific aspects.
|
|
|
|
Defines WM_BIG_ENDIAN or WM_LITTLE_ENDIAN as well as providing a
|
|
few runtime methods. Primarily used as a namespace, but provided
|
|
as a class for possible future expansion.
|
|
|
|
SourceFiles
|
|
endianI.H
|
|
|
|
\*---------------------------------------------------------------------------*/
|
|
|
|
#ifndef foamEndian_H // prefixed with 'foam' to avoid potential collisions
|
|
#define foamEndian_H
|
|
|
|
#include <cstdint>
|
|
|
|
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
|
|
|
|
#ifdef __GNUC__
|
|
#include <endian.h>
|
|
#elif defined __mips
|
|
#include <standards.h>
|
|
#include <sys/endian.h>
|
|
#endif
|
|
|
|
#ifdef __BYTE_ORDER
|
|
#if (__BYTE_ORDER == __LITTLE_ENDIAN)
|
|
#define WM_LITTLE_ENDIAN
|
|
#elif (__BYTE_ORDER == __BIG_ENDIAN)
|
|
#define WM_BIG_ENDIAN
|
|
#else
|
|
#error "__BYTE_ORDER defined, but not __LITTLE_ENDIAN or __BIG_ENDIAN."
|
|
#endif
|
|
#elif defined(__LITTLE_ENDIAN) \
|
|
|| defined(_LITTLE_ENDIAN) \
|
|
|| defined(LITTLE_ENDIAN)
|
|
#define WM_LITTLE_ENDIAN
|
|
#elif defined(__BIG_ENDIAN) \
|
|
|| defined(_BIG_ENDIAN) \
|
|
|| defined(BIG_ENDIAN)
|
|
#define WM_BIG_ENDIAN
|
|
#endif
|
|
|
|
// Special handling for OS-X
|
|
#ifdef __DARWIN_BYTE_ORDER
|
|
#if (__DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN)
|
|
#define WM_BIG_ENDIAN
|
|
#undef WM_LITTLE_ENDIAN
|
|
#elif (__DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN)
|
|
#define WM_LITTLE_ENDIAN
|
|
#undef WM_BIG_ENDIAN
|
|
#endif
|
|
#endif
|
|
|
|
// Could also downgrade to a warning, but then user always needs runtime check.
|
|
#if !defined(WM_BIG_ENDIAN) && !defined(WM_LITTLE_ENDIAN)
|
|
#error "Cannot determine BIG or LITTLE endian."
|
|
#error "Please add to compilation options"
|
|
#endif
|
|
|
|
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
|
|
|
|
namespace Foam
|
|
{
|
|
|
|
/*---------------------------------------------------------------------------*\
|
|
Class endian Declaration
|
|
\*---------------------------------------------------------------------------*/
|
|
|
|
class endian
|
|
{
|
|
// Private Member Functions
|
|
|
|
//- Disallow default bitwise copy construct
|
|
endian(const endian&) = delete;
|
|
|
|
//- Disallow default bitwise assignment
|
|
void operator=(const endian&) = delete;
|
|
|
|
public:
|
|
|
|
// Public data
|
|
|
|
//- Runtime check for big endian.
|
|
inline static bool isBig();
|
|
|
|
//- Runtime check for little endian.
|
|
inline static bool isLittle();
|
|
|
|
//- Byte endian swapping for 32-bits
|
|
inline static uint32_t swap32(uint32_t);
|
|
|
|
//- Byte endian swapping for 64-bits
|
|
inline static uint64_t swap64(uint64_t);
|
|
};
|
|
|
|
|
|
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
|
|
|
|
} // End namespace Foam
|
|
|
|
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
|
|
|
|
#include "endianI.H"
|
|
|
|
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
|
|
|
|
#endif
|
|
|
|
// ************************************************************************* //
|