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Add helper functions for easier unaligned memory access.

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* include/grub/types.h (grub_get_unaligned16): New function.
(grub_get_unaligned32): Likewise.
(grub_get_unaligned64): Likewise.
This commit is contained in:
Szymon Janc 2011-08-14 11:41:19 +02:00
parent 1f1a380be9
commit b2d7e331e2
2 changed files with 35 additions and 0 deletions
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8
ChangeLog.lzo
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@ -1,3 +1,11 @@
2001-08-14 Szymon Janc <szymon@janc.net.pl>
Add helper functions for easier unaligned memory access.
* include/grub/types.h (grub_get_unaligned16): New function.
(grub_get_unaligned32): Likewise.
(grub_get_unaligned64): Likewise.
2011-08-14 Szymon Janc <szymon@janc.net.pl>
Import minilzo library for LZO decompression support.

27
include/grub/types.h
View file

@ -222,4 +222,31 @@ static inline grub_uint64_t grub_swap_bytes64(grub_uint64_t x)
# define grub_cpu_to_le32_compile_time(x) ((grub_uint32_t) (x))
#endif /* ! WORDS_BIGENDIAN */
static inline grub_uint16_t grub_get_unaligned16(void *ptr)
{
struct
{
grub_uint16_t d;
} __attribute__((packed)) *dd = ptr;
return dd->d;
}
static inline grub_uint32_t grub_get_unaligned32(void *ptr)
{
struct
{
grub_uint32_t d;
} __attribute__((packed)) *dd = ptr;
return dd->d;
}
static inline grub_uint64_t grub_get_unaligned64(void *ptr)
{
struct
{
grub_uint64_t d;
} __attribute__((packed)) *dd = ptr;
return dd->d;
}
#endif /* ! GRUB_TYPES_HEADER */