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
127
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