src/helper/types.h

   1 /***************************************************************************
   2  *   Copyright (C) 2004, 2005 by Dominic Rath                              *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifndef TYPES_H
  21 #define TYPES_H
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #ifndef u8
  28 typedef unsigned char u8;
  29 #endif
  30
  31 #ifndef u16
  32 typedef unsigned short u16;
  33 #endif
  34
  35 #ifndef u32
  36 typedef unsigned int u32;
  37 #endif
  38
  39 #ifndef u64
  40 typedef unsigned long long u64;
  41 #endif
  42
  43
  44
  45 /* DANGER!!!! here be dragons! Note that the pointer in
  46  * memory might be unaligned. On some CPU's, i.e. ARM7,
  47  * the 2 lsb are ignored for 32 bit access, on others
  48  * it will cause an exception and on e.g. x86, it works
  49  * the same as if aligned.
  50  */
  51 #define le_to_h_u32(x) ((u32)((x)[0] | (x)[1] << 8 | (x)[2] << 16 | (x)[3] << 24))
  52 #define le_to_h_u16(x) ((u16)((x)[0] | (x)[1] << 8))
  53 #define be_to_h_u32(x) ((u32)((x)[3] | (x)[2] << 8 | (x)[1] << 16 | (x)[0] << 24))
  54 #define be_to_h_u16(x) ((u16)((x)[1] | (x)[0] << 8))
  55
  56 #define h_u32_to_le(buf, val) do {\
  57 (buf)[3] = ((val) & 0xff000000) >> 24;\
  58 (buf)[2] = ((val) & 0x00ff0000) >> 16;\
  59 (buf)[1] = ((val) & 0x0000ff00) >> 8;\
  60 (buf)[0] = ((val) & 0x000000ff);\
  61 } while (0)
  62 #define h_u32_to_be(buf, val) do {\
  63 (buf)[0] = ((val) & 0xff000000) >> 24;\
  64 (buf)[1] = ((val) & 0x00ff0000) >> 16;\
  65 (buf)[2] = ((val) & 0x0000ff00) >> 8;\
  66 (buf)[3] = ((val) & 0x000000ff);\
  67 } while (0)
  68
  69 #define h_u16_to_le(buf, val) do {\
  70 (buf)[1] = ((val) & 0xff00) >> 8;\
  71 (buf)[0] = ((val) & 0x00ff) >> 0;\
  72 } while (0)
  73 #define h_u16_to_be(buf, val) do {\
  74 (buf)[0] = ((val) & 0xff00) >> 8;\
  75 (buf)[1] = ((val) & 0x00ff) >> 0;\
  76 } while (0)
  77
  78
  79 #endif /* TYPES_H */