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   1 /*
   2  * unaligned.h
   3  *
   4  * Inline functions for unaligned memory accesses.
   5  *
   6  * The author dedicates this file to the public domain.
   7  * You can do whatever you want with this file.
   8  */
   9
  10 #ifndef _WIMLIB_UNALIGNED_H
  11 #define _WIMLIB_UNALIGNED_H
  12
  13 #include "compiler.h"
  14 #include "endianness.h"
  15 #include "types.h"
  16
  17 #define DEFINE_UNALIGNED_TYPE(type)                             \
  18 struct type##_unaligned {                                       \
  19         type v;                                                 \
  20 } _packed_attribute;                                            \
  21                                                                 \
  22 static inline type                                              \
  23 load_##type##_unaligned(const void *p)                          \
  24 {                                                               \
  25         return ((const struct type##_unaligned *)p)->v;         \
  26 }                                                               \
  27                                                                 \
  28 static inline void                                              \
  29 store_##type##_unaligned(type val, void *p)                     \
  30 {                                                               \
  31         ((struct type##_unaligned *)p)->v = val;                \
  32 }
  33
  34 DEFINE_UNALIGNED_TYPE(le16);
  35 DEFINE_UNALIGNED_TYPE(le32);
  36 DEFINE_UNALIGNED_TYPE(le64);
  37
  38 #endif /* _WIMLIB_UNALIGNED_H */