quakeforge/libs/util/qendian.c

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/*
qendian.c
(description)
Copyright (C) 1996-1997 Id Software, Inc.
Copyright (C) 1999,2000 contributors of the QuakeForge project
Please see the file "AUTHORS" for a list of contributors
This program 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 2
of the License, or (at your option) any later version.
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:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <ctype.h>
#include "QF/qendian.h"
#include "QF/qtypes.h"
#include "QF/quakeio.h"
/*
BYTE ORDER FUNCTIONS
*/
#ifndef WORDS_BIGENDIAN
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VISIBLE qboolean bigendien = false;
#else
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VISIBLE qboolean bigendien = true;
#endif
VISIBLE uint16_t
_ShortSwap (uint16_t l)
{
byte b1, b2;
b1 = l & 255;
b2 = (l >> 8) & 255;
return (b1 << 8) + b2;
}
VISIBLE uint16_t
_ShortNoSwap (uint16_t l)
{
return l;
}
VISIBLE uint32_t
_LongSwap (uint32_t l)
{
byte b1, b2, b3, b4;
b1 = l & 255;
b2 = (l >> 8) & 255;
b3 = (l >> 16) & 255;
b4 = (l >> 24) & 255;
return ((int) b1 << 24) + ((int) b2 << 16) + ((int) b3 << 8) + b4;
}
VISIBLE uint32_t
_LongNoSwap (uint32_t l)
{
return l;
}
VISIBLE float
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_FloatSwap (float f)
{
union {
float f;
byte b[4];
} dat1 , dat2;
dat1.f = f;
dat2.b[0] = dat1.b[3];
dat2.b[1] = dat1.b[2];
dat2.b[2] = dat1.b[1];
dat2.b[3] = dat1.b[0];
return dat2.f;
}
VISIBLE float
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_FloatNoSwap (float f)
{
return f;
}