1 /* 2 byteorder.h (12.01.10) 3 Endianness stuff. exFAT uses little-endian byte order. 4 5 Free exFAT implementation. 6 Copyright (C) 2010-2023 Andrew Nayenko 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation, either version 2 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License along 19 with this program; if not, write to the Free Software Foundation, Inc., 20 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 21 */ 22 23 #ifndef BYTEORDER_H_INCLUDED 24 #define BYTEORDER_H_INCLUDED 25 26 #include "platform.h" 27 #include <stdint.h> 28 #include <stddef.h> 29 30 typedef struct { uint16_t __u16; } le16_t; 31 typedef struct { uint32_t __u32; } le32_t; 32 typedef struct { uint64_t __u64; } le64_t; 33 34 #if EXFAT_BYTE_ORDER == EXFAT_LITTLE_ENDIAN 35 le16_to_cpu(le16_t v)36static inline uint16_t le16_to_cpu(le16_t v) { return v.__u16; } le32_to_cpu(le32_t v)37static inline uint32_t le32_to_cpu(le32_t v) { return v.__u32; } le64_to_cpu(le64_t v)38static inline uint64_t le64_to_cpu(le64_t v) { return v.__u64; } 39 cpu_to_le16(uint16_t v)40static inline le16_t cpu_to_le16(uint16_t v) { le16_t t = {v}; return t; } cpu_to_le32(uint32_t v)41static inline le32_t cpu_to_le32(uint32_t v) { le32_t t = {v}; return t; } cpu_to_le64(uint64_t v)42static inline le64_t cpu_to_le64(uint64_t v) { le64_t t = {v}; return t; } 43 44 typedef size_t bitmap_t; 45 46 #elif EXFAT_BYTE_ORDER == EXFAT_BIG_ENDIAN 47 le16_to_cpu(le16_t v)48static inline uint16_t le16_to_cpu(le16_t v) 49 { return exfat_bswap16(v.__u16); } le32_to_cpu(le32_t v)50static inline uint32_t le32_to_cpu(le32_t v) 51 { return exfat_bswap32(v.__u32); } le64_to_cpu(le64_t v)52static inline uint64_t le64_to_cpu(le64_t v) 53 { return exfat_bswap64(v.__u64); } 54 cpu_to_le16(uint16_t v)55static inline le16_t cpu_to_le16(uint16_t v) 56 { le16_t t = {exfat_bswap16(v)}; return t; } cpu_to_le32(uint32_t v)57static inline le32_t cpu_to_le32(uint32_t v) 58 { le32_t t = {exfat_bswap32(v)}; return t; } cpu_to_le64(uint64_t v)59static inline le64_t cpu_to_le64(uint64_t v) 60 { le64_t t = {exfat_bswap64(v)}; return t; } 61 62 typedef unsigned char bitmap_t; 63 64 #else 65 #error Wow! You have a PDP machine?! 66 #endif 67 68 #endif /* ifndef BYTEORDER_H_INCLUDED */ 69