1 /* 2 libparted - a library for manipulating disk partitions 3 Copyright (C) 1998-2002, 2007 Free Software Foundation, Inc. 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 3 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, see <http://www.gnu.org/licenses/>. 17 */ 18 19 /* should only be #included by files in libparted */ 20 21 #ifndef PED_ENDIAN_H_INCLUDED 22 #define PED_ENDIAN_H_INCLUDED 23 24 #include <stdint.h> 25 26 /* returns the n'th least significant byte */ 27 #define _GET_BYTE(x, n) ( ((x) >> (8 * (n))) & 0xff ) 28 29 #define _PED_SWAP16(x) ( (_GET_BYTE(x, 0) << 8) \ 30 + (_GET_BYTE(x, 1) << 0) ) 31 32 #define _PED_SWAP32(x) ( (_GET_BYTE(x, 0) << 24) \ 33 + (_GET_BYTE(x, 1) << 16) \ 34 + (_GET_BYTE(x, 2) << 8) \ 35 + (_GET_BYTE(x, 3) << 0) ) 36 37 #define _PED_SWAP64(x) ( (_GET_BYTE(x, 0) << 56) \ 38 + (_GET_BYTE(x, 1) << 48) \ 39 + (_GET_BYTE(x, 2) << 40) \ 40 + (_GET_BYTE(x, 3) << 32) \ 41 + (_GET_BYTE(x, 4) << 24) \ 42 + (_GET_BYTE(x, 5) << 16) \ 43 + (_GET_BYTE(x, 6) << 8) \ 44 + (_GET_BYTE(x, 7) << 0) ) 45 46 #define PED_SWAP16(x) ((uint16_t) _PED_SWAP16( (uint16_t) (x) )) 47 #define PED_SWAP32(x) ((uint32_t) _PED_SWAP32( (uint32_t) (x) )) 48 #define PED_SWAP64(x) ((uint64_t) _PED_SWAP64( (uint64_t) (x) )) 49 50 #ifdef WORDS_BIGENDIAN 51 52 #define PED_CPU_TO_LE16(x) PED_SWAP16(x) 53 #define PED_CPU_TO_BE16(x) (x) 54 #define PED_CPU_TO_LE32(x) PED_SWAP32(x) 55 #define PED_CPU_TO_BE32(x) (x) 56 #define PED_CPU_TO_LE64(x) PED_SWAP64(x) 57 #define PED_CPU_TO_BE64(x) (x) 58 59 #define PED_LE16_TO_CPU(x) PED_SWAP16(x) 60 #define PED_BE16_TO_CPU(x) (x) 61 #define PED_LE32_TO_CPU(x) PED_SWAP32(x) 62 #define PED_BE32_TO_CPU(x) (x) 63 #define PED_LE64_TO_CPU(x) PED_SWAP64(x) 64 #define PED_BE64_TO_CPU(x) (x) 65 66 #else /* !WORDS_BIGENDIAN */ 67 68 #define PED_CPU_TO_LE16(x) (x) 69 #define PED_CPU_TO_BE16(x) PED_SWAP16(x) 70 #define PED_CPU_TO_LE32(x) (x) 71 #define PED_CPU_TO_BE32(x) PED_SWAP32(x) 72 #define PED_CPU_TO_LE64(x) (x) 73 #define PED_CPU_TO_BE64(x) PED_SWAP64(x) 74 75 #define PED_LE16_TO_CPU(x) (x) 76 #define PED_BE16_TO_CPU(x) PED_SWAP16(x) 77 #define PED_LE32_TO_CPU(x) (x) 78 #define PED_BE32_TO_CPU(x) PED_SWAP32(x) 79 #define PED_LE64_TO_CPU(x) (x) 80 #define PED_BE64_TO_CPU(x) PED_SWAP64(x) 81 82 #endif /* !WORDS_BIGENDIAN */ 83 84 #endif /* PED_ENDIAN_H_INCLUDED */ 85 86