types.h 2.86 KB
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/***************************************************************************
 *   Copyright (C) 2004, 2005 by Dominic Rath                              *
 *   Dominic.Rath@gmx.de                                                   *
 *                                                                         *
 *   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 the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#ifndef TYPES_H
#define TYPES_H
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifndef u8
typedef unsigned char u8;
#endif

#ifndef u16
typedef unsigned short u16;
#endif

#ifndef u32
typedef unsigned int u32;
#endif

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#ifndef u64
typedef unsigned long long u64;
#endif

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/* DANGER!!!! here be dragons! Note that the pointer in 
 * memory might be unaligned. On some CPU's, i.e. ARM7,
 * the 2 lsb are ignored for 32 bit access, on others
 * it will cause an exception and on e.g. x86, it works
 * the same as if aligned.
 */
#define le_to_h_u32(x) ((u32)((x)[0] | (x)[1] << 8 | (x)[2] << 16 | (x)[3] << 24))
#define le_to_h_u16(x) ((u16)((x)[0] | (x)[1] << 8))
#define be_to_h_u32(x) ((u32)((x)[3] | (x)[2] << 8 | (x)[1] << 16 | (x)[0] << 24))
#define be_to_h_u16(x) ((u16)((x)[1] | (x)[0] << 8))
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#define h_u32_to_le(buf, val) do {\
(buf)[3] = ((val) & 0xff000000) >> 24;\
(buf)[2] = ((val) & 0x00ff0000) >> 16;\
(buf)[1] = ((val) & 0x0000ff00) >> 8;\
(buf)[0] = ((val) & 0x000000ff);\
} while (0)
#define h_u32_to_be(buf, val) do {\
(buf)[0] = ((val) & 0xff000000) >> 24;\
(buf)[1] = ((val) & 0x00ff0000) >> 16;\
(buf)[2] = ((val) & 0x0000ff00) >> 8;\
(buf)[3] = ((val) & 0x000000ff);\
} while (0)
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#define h_u16_to_le(buf, val) do {\
(buf)[1] = ((val) & 0xff00) >> 8;\
(buf)[0] = ((val) & 0x00ff) >> 0;\
} while (0)
#define h_u16_to_be(buf, val) do {\
(buf)[0] = ((val) & 0xff00) >> 8;\
(buf)[1] = ((val) & 0x00ff) >> 0;\
} while (0)
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#endif /* TYPES_H */