fs/udf/udfend.h

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