| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/befs/endian.h |
| 3 | * |
| 4 | * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com> |
| 5 | * |
| 6 | * Partially based on similar funtions in the sysv driver. |
| 7 | */ |
| 8 | |
| 9 | #ifndef LINUX_BEFS_ENDIAN |
| 10 | #define LINUX_BEFS_ENDIAN |
| 11 | |
| 12 | #include <linux/byteorder/generic.h> |
| 13 | #include "befs.h" |
| 14 | |
| 15 | static inline u64 |
| 16 | fs64_to_cpu(const struct super_block *sb, u64 n) |
| 17 | { |
| 18 | if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) |
| 19 | return le64_to_cpu(n); |
| 20 | else |
| 21 | return be64_to_cpu(n); |
| 22 | } |
| 23 | |
| 24 | static inline u64 |
| 25 | cpu_to_fs64(const struct super_block *sb, u64 n) |
| 26 | { |
| 27 | if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) |
| 28 | return cpu_to_le64(n); |
| 29 | else |
| 30 | return cpu_to_be64(n); |
| 31 | } |
| 32 | |
| 33 | static inline u32 |
| 34 | fs32_to_cpu(const struct super_block *sb, u32 n) |
| 35 | { |
| 36 | if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) |
| 37 | return le32_to_cpu(n); |
| 38 | else |
| 39 | return be32_to_cpu(n); |
| 40 | } |
| 41 | |
| 42 | static inline u32 |
| 43 | cpu_to_fs32(const struct super_block *sb, u32 n) |
| 44 | { |
| 45 | if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) |
| 46 | return cpu_to_le32(n); |
| 47 | else |
| 48 | return cpu_to_be32(n); |
| 49 | } |
| 50 | |
| 51 | static inline u16 |
| 52 | fs16_to_cpu(const struct super_block *sb, u16 n) |
| 53 | { |
| 54 | if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) |
| 55 | return le16_to_cpu(n); |
| 56 | else |
| 57 | return be16_to_cpu(n); |
| 58 | } |
| 59 | |
| 60 | static inline u16 |
| 61 | cpu_to_fs16(const struct super_block *sb, u16 n) |
| 62 | { |
| 63 | if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) |
| 64 | return cpu_to_le16(n); |
| 65 | else |
| 66 | return cpu_to_be16(n); |
| 67 | } |
| 68 | |
| 69 | /* Composite types below here */ |
| 70 | |
| 71 | static inline befs_block_run |
| 72 | fsrun_to_cpu(const struct super_block *sb, befs_block_run n) |
| 73 | { |
| 74 | befs_block_run run; |
| 75 | |
| 76 | if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) { |
| 77 | run.allocation_group = le32_to_cpu(n.allocation_group); |
| 78 | run.start = le16_to_cpu(n.start); |
| 79 | run.len = le16_to_cpu(n.len); |
| 80 | } else { |
| 81 | run.allocation_group = be32_to_cpu(n.allocation_group); |
| 82 | run.start = be16_to_cpu(n.start); |
| 83 | run.len = be16_to_cpu(n.len); |
| 84 | } |
| 85 | return run; |
| 86 | } |
| 87 | |
| 88 | static inline befs_block_run |
| 89 | cpu_to_fsrun(const struct super_block *sb, befs_block_run n) |
| 90 | { |
| 91 | befs_block_run run; |
| 92 | |
| 93 | if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) { |
| 94 | run.allocation_group = cpu_to_le32(n.allocation_group); |
| 95 | run.start = cpu_to_le16(n.start); |
| 96 | run.len = cpu_to_le16(n.len); |
| 97 | } else { |
| 98 | run.allocation_group = cpu_to_be32(n.allocation_group); |
| 99 | run.start = cpu_to_be16(n.start); |
| 100 | run.len = cpu_to_be16(n.len); |
| 101 | } |
| 102 | return run; |
| 103 | } |
| 104 | |
| 105 | static inline befs_data_stream |
| 106 | fsds_to_cpu(const struct super_block *sb, befs_data_stream n) |
| 107 | { |
| 108 | befs_data_stream data; |
| 109 | int i; |
| 110 | |
| 111 | for (i = 0; i < BEFS_NUM_DIRECT_BLOCKS; ++i) |
| 112 | data.direct[i] = fsrun_to_cpu(sb, n.direct[i]); |
| 113 | |
| 114 | data.max_direct_range = fs64_to_cpu(sb, n.max_direct_range); |
| 115 | data.indirect = fsrun_to_cpu(sb, n.indirect); |
| 116 | data.max_indirect_range = fs64_to_cpu(sb, n.max_indirect_range); |
| 117 | data.double_indirect = fsrun_to_cpu(sb, n.double_indirect); |
| 118 | data.max_double_indirect_range = fs64_to_cpu(sb, |
| 119 | n. |
| 120 | max_double_indirect_range); |
| 121 | data.size = fs64_to_cpu(sb, n.size); |
| 122 | |
| 123 | return data; |
| 124 | } |
| 125 | |
| 126 | #endif //LINUX_BEFS_ENDIAN |