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/* Time-stamp: <2010-08-29 22:11:04 poser> */
/*
* Copyright (C) 2004 William J. Poser (billposer@alum.mit.edu)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 3 the GNU General Public License
* as published by the Free Software Foundation.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
* or go to the web page: http://www.gnu.org/licenses/gpl.txt.
*/
#include "a2b_endian.h"
/* Returns a value indicating the endianness of the machine */
int Get_Endianness(void)
{
unsigned int qp = 0x0f0d0501; /* By definition, msb = 0f, lsb = 01 */
char *bp;
bp = (char *) &qp; /* bp now points at first byte of 4 byte sequence */
if((bp[0] == 0x01) && /* 1234 pattern */
(bp[1] == 0x05) &&
(bp[2] == 0x0d) &&
(bp[3] == 0x0f)) return(E_LITTLE_ENDIAN);
if((bp[3] == 0x01) && /* 4321 pattern */
(bp[2] == 0x05) &&
(bp[1] == 0x0d) &&
(bp[0] == 0x0f)) return(E_BIG_ENDIAN);
if((bp[2] == 0x01) && /* 3421 pattern */
(bp[3] == 0x05) &&
(bp[0] == 0x0d) &&
(bp[1] == 0x0f)) return(E_PDP_ENDIAN);
return(E_UNKNOWN_ENDIAN);
}
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