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bigbiff bigbiff9c754052013-01-09 09:09:08 -05001/*
2 byteorder.h (12.01.10)
3 Endianness stuff. exFAT uses little-endian byte order.
4
bigbiff bigbiff61cdc022013-08-08 08:35:06 -04005 Free exFAT implementation.
bigbiff bigbiff2e33c5e2014-09-04 20:58:41 -04006 Copyright (C) 2010-2014 Andrew Nayenko
bigbiff bigbiff9c754052013-01-09 09:09:08 -05007
bigbiff bigbiff61cdc022013-08-08 08:35:06 -04008 This program is free software; you can redistribute it and/or modify
bigbiff bigbiff9c754052013-01-09 09:09:08 -05009 it under the terms of the GNU General Public License as published by
bigbiff bigbiff61cdc022013-08-08 08:35:06 -040010 the Free Software Foundation, either version 2 of the License, or
bigbiff bigbiff9c754052013-01-09 09:09:08 -050011 (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
bigbiff bigbiff61cdc022013-08-08 08:35:06 -040018 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.
bigbiff bigbiff9c754052013-01-09 09:09:08 -050021*/
22
23#ifndef BYTEORDER_H_INCLUDED
24#define BYTEORDER_H_INCLUDED
25
bigbiff bigbiff9c754052013-01-09 09:09:08 -050026#include <stdint.h>
bigbiff bigbiff2e33c5e2014-09-04 20:58:41 -040027#include "platform.h"
bigbiff bigbiff9c754052013-01-09 09:09:08 -050028
bigbiff bigbiff9c754052013-01-09 09:09:08 -050029typedef struct { uint16_t __u16; } le16_t;
30typedef struct { uint32_t __u32; } le32_t;
31typedef struct { uint64_t __u64; } le64_t;
32
bigbiff bigbiff2e33c5e2014-09-04 20:58:41 -040033#if EXFAT_BYTE_ORDER == EXFAT_LITTLE_ENDIAN
34
bigbiff bigbiff9c754052013-01-09 09:09:08 -050035static inline uint16_t le16_to_cpu(le16_t v) { return v.__u16; }
36static inline uint32_t le32_to_cpu(le32_t v) { return v.__u32; }
37static inline uint64_t le64_to_cpu(le64_t v) { return v.__u64; }
38
39static inline le16_t cpu_to_le16(uint16_t v) { le16_t t = {v}; return t; }
40static inline le32_t cpu_to_le32(uint32_t v) { le32_t t = {v}; return t; }
41static inline le64_t cpu_to_le64(uint64_t v) { le64_t t = {v}; return t; }
bigbiff bigbiff2e33c5e2014-09-04 20:58:41 -040042
43typedef size_t bitmap_t;
44
45#elif EXFAT_BYTE_ORDER == EXFAT_BIG_ENDIAN
46
47static inline uint16_t le16_to_cpu(le16_t v)
48 { return exfat_bswap16(v.__u16); }
49static inline uint32_t le32_to_cpu(le32_t v)
50 { return exfat_bswap32(v.__u32); }
51static inline uint64_t le64_to_cpu(le64_t v)
52 { return exfat_bswap64(v.__u64); }
bigbiff bigbiff9c754052013-01-09 09:09:08 -050053
54static inline le16_t cpu_to_le16(uint16_t v)
bigbiff bigbiff2e33c5e2014-09-04 20:58:41 -040055 { le16_t t = {exfat_bswap16(v)}; return t; }
bigbiff bigbiff9c754052013-01-09 09:09:08 -050056static inline le32_t cpu_to_le32(uint32_t v)
bigbiff bigbiff2e33c5e2014-09-04 20:58:41 -040057 { le32_t t = {exfat_bswap32(v)}; return t; }
bigbiff bigbiff9c754052013-01-09 09:09:08 -050058static inline le64_t cpu_to_le64(uint64_t v)
bigbiff bigbiff2e33c5e2014-09-04 20:58:41 -040059 { le64_t t = {exfat_bswap64(v)}; return t; }
60
61typedef unsigned char bitmap_t;
62
bigbiff bigbiff9c754052013-01-09 09:09:08 -050063#else
64#error Wow! You have a PDP machine?!
65#endif
66
67#endif /* ifndef BYTEORDER_H_INCLUDED */