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Functions | |
| UNIV_INLINE ib_uint64_t | ut_ull_create (ulint high, ulint low) |
| UNIV_INLINE ib_uint64_t | ut_uint64_align_down (ib_uint64_t n, ulint align_no) |
| UNIV_INLINE ib_uint64_t | ut_uint64_align_up (ib_uint64_t n, ulint align_no) |
| UNIV_INLINE void * | ut_align (const void *ptr, ulint align_no) |
| UNIV_INLINE void * | ut_align_down (const void *ptr, ulint align_no) |
| UNIV_INLINE ulint | ut_align_offset (const void *ptr, ulint align_no) |
| UNIV_INLINE ibool | ut_bit_get_nth (ulint a, ulint n) |
| UNIV_INLINE ulint | ut_bit_set_nth (ulint a, ulint n, ibool val) |
Detailed Description
Utilities for byte operations
Created 5/30/1994 Heikki Tuuri
Function Documentation
| UNIV_INLINE void* ut_align | ( | const void * | ptr, |
| ulint | align_no | ||
| ) |
The following function rounds up a pointer to the nearest aligned address.
- Returns
- aligned pointer
- Parameters
-
ptr in: pointer align_no in: align by this number
| UNIV_INLINE void* ut_align_down | ( | const void * | ptr, |
| ulint | align_no | ||
| ) |
The following function rounds down a pointer to the nearest aligned address.
- Returns
- aligned pointer
- Parameters
-
ptr in: pointer align_no in: align by this number
| UNIV_INLINE ulint ut_align_offset | ( | const void * | ptr, |
| ulint | align_no | ||
| ) |
The following function computes the offset of a pointer from the nearest aligned address.
- Returns
- distance from aligned pointer
- Parameters
-
ptr in: pointer align_no in: align by this number
| UNIV_INLINE ibool ut_bit_get_nth | ( | ulint | a, |
| ulint | n | ||
| ) |
Gets the nth bit of a ulint.
- Returns
- TRUE if nth bit is 1; 0th bit is defined to be the least significant
- Parameters
-
a in: ulint n in: nth bit requested
| UNIV_INLINE ulint ut_bit_set_nth | ( | ulint | a, |
| ulint | n, | ||
| ibool | val | ||
| ) |
Sets the nth bit of a ulint.
- Returns
- the ulint with the bit set as requested
- Parameters
-
a in: ulint n in: nth bit requested val in: value for the bit to set
| UNIV_INLINE ib_uint64_t ut_uint64_align_down | ( | ib_uint64_t | n, |
| ulint | align_no | ||
| ) |
Rounds a 64-bit integer downward to a multiple of a power of 2.
- Returns
- rounded value
- Parameters
-
n in: number to be rounded align_no in: align by this number which must be a power of 2
| UNIV_INLINE ib_uint64_t ut_uint64_align_up | ( | ib_uint64_t | n, |
| ulint | align_no | ||
| ) |
Rounds ib_uint64_t upward to a multiple of a power of 2.
- Returns
- rounded value
- Parameters
-
n in: number to be rounded align_no in: align by this number which must be a power of 2
| UNIV_INLINE ib_uint64_t ut_ull_create | ( | ulint | high, |
| ulint | low | ||
| ) |
Creates a 64-bit integer out of two 32-bit integers.
- Returns
- created integer
- Parameters
-
high in: high-order 32 bits low in: low-order 32 bits
