| /* |
| * Copyright (c) 2005-2006, David Fahlander |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * Redistributions of source code must retain the above copyright notice, this |
| * list of conditions and the following disclaimer. Redistributions in binary |
| * form must reproduce the above copyright notice, this list of conditions and |
| * the following disclaimer in the documentation and/or other materials provided |
| * with the distribution. Neither the name of slurk.org nor the names |
| * of its contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| // First try - check __BYTE_ORDER macro |
| #if !defined IFR_IS_BIG_ENDIAN && !defined IFR_IS_LITTLE_ENDIAN && !defined IFR_IS_DPD_ENDIAN |
| # ifdef unix
|
| # include <sys/param.h> // defines __BYTE_ORDER (or sometimes __LITTLE_ENDIAN or __BIG_ENDIAN or __PDP_ENDIAN)
|
| # endif
|
| # if defined (__GLIBC__)
|
| # include <endian.h> // Can also define __BYTE_ORDER
|
| # endif
|
| # ifdef __BYTE_ORDER
|
| # if __BYTE_ORDER == __LITTLE_ENDIAN
|
| # define IFR_IS_LITTLE_ENDIAN
|
| # elif __BYTE_ORDER == __BIG_ENDIAN
|
| # define IFR_IS_BIG_ENDIAN
|
| # elif __BYTE_ORDER == __PDP_ENDIAN
|
| # define IFR_IS_PDP_ENDIAN
|
| # endif
|
| # endif
|
| #endif
|
|
|
| // Second try - check __LITTLE_ENDIAN or __BIG_ENDIAN |
| #if !defined IFR_IS_BIG_ENDIAN && !defined IFR_IS_LITTLE_ENDIAN && !defined IFR_IS_DPD_ENDIAN
|
| # if defined __LITTLE_ENDIAN
|
| # define IFR_IS_LITTLE_ENDIAN
|
| # elif defined __BIG_ENDIAN
|
| # define IFR_IS_BIG_ENDIAN
|
| # elif defined __PDP_ENDIAN
|
| # define IFR_IS_PDP_ENDIAN
|
| # endif
|
| #endif
|
|
|
| // Last try - find out from well-known processor types using little endian
|
| #if !defined IFR_IS_BIG_ENDIAN && !defined IFR_IS_LITTLE_ENDIAN && !defined IFR_IS_DPD_ENDIAN
|
| # if defined (i386) || defined (__i386__) \
|
| || defined (_M_IX86) || defined (vax) \
|
| || defined (__alpha) || defined (__alpha__) \
|
| || defined (__x86_64__) || defined (__ia64) \
|
| || defined (__ia64__) || defined (__amd64__) \
|
| || defined (_M_IX86) || defined (_M_IA64) \
|
| || defined (_M_ALPHA)
|
| # define IFR_IS_LITTLE_ENDIAN
|
| # else
|
| # if defined (__sparc) || defined(__sparc__) \
|
| || defined(_POWER) || defined(__powerpc__) \
|
| || defined(__ppc__) || defined(__hppa) \
|
| || defined(_MIPSEB) || defined(_POWER) \
|
| || defined(__s390__)
|
| # define IFR_IS_BIG_ENDIAN
|
| # endif
|
| # endif
|
| #endif
|
| |
| // Show error if we still don't know endianess |
| #if !defined IFR_IS_BIG_ENDIAN && !defined IFR_IS_LITTLE_ENDIAN && !defined IFR_IS_DPD_ENDIAN
|
| #error "Could not determine endianess of your processor type"
|
| #endif
|
|
|
