fs/udf/udfend.h

   1 #ifndef __UDF_ENDIAN_H
   2 #define __UDF_ENDIAN_H
   3
   4 #ifndef __KERNEL__
   5
   6 #include <sys/types.h>
   7
   8 #if __BYTE_ORDER == 0
   9
  10 #error "__BYTE_ORDER must be defined"
  11
  12 #elif __BYTE_ORDER == __BIG_ENDIAN
  13
  14 #define le16_to_cpu(x) \
  15         ((Uint16)((((Uint16)(x) & 0x00FFU) << 8) | \
  16                   (((Uint16)(x) & 0xFF00U) >> 8)))
  17
  18 #define le32_to_cpu(x) \
  19         ((Uint32)((((Uint32)(x) & 0x000000FFU) << 24) | \
  20                   (((Uint32)(x) & 0x0000FF00U) <<  8) | \
  21                   (((Uint32)(x) & 0x00FF0000U) >>  8) | \
  22                   (((Uint32)(x) & 0xFF000000U) >> 24)))
  23
  24 #define le64_to_cpu(x) \
  25         ((Uint64)((((Uint64)(x) & 0x00000000000000FFULL) << 56) | \
  26                   (((Uint64)(x) & 0x000000000000FF00ULL) << 40) | \
  27                   (((Uint64)(x) & 0x0000000000FF0000ULL) << 24) | \
  28                   (((Uint64)(x) & 0x00000000FF000000ULL) <<  8) | \
  29                   (((Uint64)(x) & 0x000000FF00000000ULL) >>  8) | \
  30                   (((Uint64)(x) & 0x0000FF0000000000ULL) >> 24) | \
  31                   (((Uint64)(x) & 0x00FF000000000000ULL) >> 40) | \
  32                   (((Uint64)(x) & 0xFF00000000000000ULL) >> 56)))
  33
  34 #define cpu_to_le16(x) (le16_to_cpu(x))
  35 #define cpu_to_le32(x) (le32_to_cpu(x))
  36 #define cpu_to_le64(x) (le64_to_cpu(x))
  37
  38 #else /* __BYTE_ORDER == __LITTLE_ENDIAN */
  39
  40 #define le16_to_cpu(x) (x)
  41 #define le32_to_cpu(x) (x)
  42 #define le64_to_cpu(x) (x)
  43 #define cpu_to_le16(x) (x)
  44 #define cpu_to_le32(x) (x)
  45 #define cpu_to_le64(x) (x)
  46
  47 #endif /* __BYTE_ORDER == 0 */
  48
  49 #include <string.h>
  50
  51 #else /* __KERNEL__ */
  52
  53 #include <asm/byteorder.h>
  54 #include <linux/string.h>
  55
  56 #endif /* ! __KERNEL__ */
  57
  58 static inline lb_addr lelb_to_cpu(lb_addr in)
  59 {
  60         lb_addr out;
  61         out.logicalBlockNum = le32_to_cpu(in.logicalBlockNum);
  62         out.partitionReferenceNum = le16_to_cpu(in.partitionReferenceNum);
  63         return out;
  64 }
  65
  66 static inline lb_addr cpu_to_lelb(lb_addr in)
  67 {
  68         lb_addr out;
  69         out.logicalBlockNum = cpu_to_le32(in.logicalBlockNum);
  70         out.partitionReferenceNum = cpu_to_le16(in.partitionReferenceNum);
  71         return out;
  72 }
  73
  74 static inline timestamp lets_to_cpu(timestamp in)
  75 {
  76         timestamp out;
  77         memcpy(&out, &in, sizeof(timestamp));
  78         out.typeAndTimezone = le16_to_cpu(in.typeAndTimezone);
  79         out.year = le16_to_cpu(in.year);
  80         return out;
  81 }
  82
  83 static inline long_ad lela_to_cpu(long_ad in)
  84 {
  85         long_ad out;
  86         out.extLength = le32_to_cpu(in.extLength);
  87         out.extLocation = lelb_to_cpu(in.extLocation);
  88         return out;
  89 }
  90
  91 static inline long_ad cpu_to_lela(long_ad in)
  92 {
  93         long_ad out;
  94         out.extLength = cpu_to_le32(in.extLength);
  95         out.extLocation = cpu_to_lelb(in.extLocation);
  96         return out;
  97 }
  98
  99 static inline extent_ad leea_to_cpu(extent_ad in)
 100 {
 101         extent_ad out;
 102         out.extLength = le32_to_cpu(in.extLength);
 103         out.extLocation = le32_to_cpu(in.extLocation);
 104         return out;
 105 }
 106
 107 static inline timestamp cpu_to_lets(timestamp in)
 108 {
 109         timestamp out;
 110         memcpy(&out, &in, sizeof(timestamp));
 111         out.typeAndTimezone = cpu_to_le16(in.typeAndTimezone);
 112         out.year = cpu_to_le16(in.year);
 113         return out;
 114 }
 115
 116 #endif /* __UDF_ENDIAN_H */