1 /* Libvisual - The audio visualisation framework. 2 * 3 * Copyright (C) 2004, 2005 Dennis Smit <ds@nerds-incorporated.org> 4 * 5 * Authors: Dennis Smit <ds@nerds-incorporated.org> 6 * 7 * $Id: 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU Lesser General Public License as 11 * published by the Free Software Foundation; either version 2.1 12 * of the License, or (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 */ 23 24 #ifndef _LV_ENDIANESS_H 25 #define _LV_ENDIANESS_H 26 27 #include <libvisual/lvconfig.h> 28 29 #ifdef __cplusplus 30 extern "C" { 31 #endif /* __cplusplus */ 32 33 /** 34 * Macros to convert LE <-> BE 35 * 'I' stands for integer here. 36 */ 37 #define VISUAL_ENDIAN_LE_BE_I16(w) (\ 38 (((w) & 0xff00) >> 8) |\ 39 (((w) & 0x00ff) << 8) ) 40 41 #define VISUAL_ENDIAN_LE_BE_I32(w) (\ 42 (((w) & 0x000000ff) << 24) | \ 43 (((w) & 0x0000ff00) << 8) | \ 44 (((w) & 0x00ff0000) >> 8) | \ 45 (((w) & 0xff000000) >> 24) ) 46 47 48 #if VISUAL_BIG_ENDIAN & VISUAL_LITTLE_ENDIAN 49 # error determining system endianess. 50 #endif 51 52 /** 53 * Arch. dependant definitions 54 */ 55 56 #if VISUAL_BIG_ENDIAN 57 # define VISUAL_ENDIAN_BEI16(x) (x) 58 # define VISUAL_ENDIAN_BEI32(x) (x) 59 # define VISUAL_ENDIAN_LEI16(x) VISUAL_ENDIAN_LE_BE_I16(x) 60 # define VISUAL_ENDIAN_LEI32(x) VISUAL_ENDIAN_LE_BE_I32(x) 61 #endif 62 63 #if VISUAL_LITTLE_ENDIAN 64 # define VISUAL_ENDIAN_LEI16(x) (x) 65 # define VISUAL_ENDIAN_LEI32(x) (x) 66 # define VISUAL_ENDIAN_BEI16(x) VISUAL_ENDIAN_LE_BE_I16(x) 67 # define VISUAL_ENDIAN_BEI32(x) VISUAL_ENDIAN_LE_BE_I32(x) 68 #endif 69 70 71 #ifdef __cplusplus 72 } 73 #endif /* __cplusplus */ 74 75 #endif /* _LV_ENDIANESS_H */ 76