ut0ut.h
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上传日期:2007-04-14
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- /**********************************************************************
- Various utilities
- (c) 1994, 1995 Innobase Oy
- Created 1/20/1994 Heikki Tuuri
- ***********************************************************************/
- #ifndef ut0ut_h
- #define ut0ut_h
- #include <time.h>
- #include <ctype.h>
- #include "univ.i"
- typedef time_t ib_time_t;
- /**********************************************************
- Calculates the minimum of two ulints. */
- UNIV_INLINE
- ulint
- ut_min(
- /*===*/
- /* out: minimum */
- ulint n1, /* in: first number */
- ulint n2); /* in: second number */
- /**********************************************************
- Calculates the maximum of two ulints. */
- UNIV_INLINE
- ulint
- ut_max(
- /*===*/
- /* out: maximum */
- ulint n1, /* in: first number */
- ulint n2); /* in: second number */
- /********************************************************************
- Calculates minimum of two ulint-pairs. */
- UNIV_INLINE
- void
- ut_pair_min(
- /*========*/
- ulint* a, /* out: more significant part of minimum */
- ulint* b, /* out: less significant part of minimum */
- ulint a1, /* in: more significant part of first pair */
- ulint b1, /* in: less significant part of first pair */
- ulint a2, /* in: more significant part of second pair */
- ulint b2); /* in: less significant part of second pair */
- /**********************************************************
- Compares two ulints. */
- UNIV_INLINE
- int
- ut_ulint_cmp(
- /*=========*/
- /* out: 1 if a > b, 0 if a == b, -1 if a < b */
- ulint a, /* in: ulint */
- ulint b); /* in: ulint */
- /***********************************************************
- Compares two pairs of ulints. */
- UNIV_INLINE
- int
- ut_pair_cmp(
- /*========*/
- /* out: -1 if a < b, 0 if a == b,
- 1 if a > b */
- ulint a1, /* in: more significant part of first pair */
- ulint a2, /* in: less significant part of first pair */
- ulint b1, /* in: more significant part of second pair */
- ulint b2); /* in: less significant part of second pair */
- /*****************************************************************
- Calculates fast the remainder when divided by a power of two. */
- UNIV_INLINE
- ulint
- ut_2pow_remainder(
- /*==============*/ /* out: remainder */
- ulint n, /* in: number to be divided */
- ulint m); /* in: divisor; power of 2 */
- /*****************************************************************
- Calculates fast value rounded to a multiple of a power of 2. */
- UNIV_INLINE
- ulint
- ut_2pow_round(
- /*==========*/ /* out: value of n rounded down to nearest
- multiple of m */
- ulint n, /* in: number to be rounded */
- ulint m); /* in: divisor; power of 2 */
- /*****************************************************************
- Calculates fast the 2-logarithm of a number, rounded upward to an
- integer. */
- UNIV_INLINE
- ulint
- ut_2_log(
- /*=====*/
- /* out: logarithm in the base 2, rounded upward */
- ulint n); /* in: number */
- /*****************************************************************
- Calculates 2 to power n. */
- UNIV_INLINE
- ulint
- ut_2_exp(
- /*=====*/
- /* out: 2 to power n */
- ulint n); /* in: number */
- /*****************************************************************
- Calculates fast the number rounded up to the nearest power of 2. */
- UNIV_INLINE
- ulint
- ut_2_power_up(
- /*==========*/
- /* out: first power of 2 which is >= n */
- ulint n); /* in: number != 0 */
- /****************************************************************
- Sort function for ulint arrays. */
- void
- ut_ulint_sort(ulint* arr, ulint* aux_arr, ulint low, ulint high);
- /*============================================================*/
- /************************************************************
- The following function returns a clock time in milliseconds. */
- ulint
- ut_clock(void);
- /**************************************************************
- Returns system time. We do not specify the format of the time returned:
- the only way to manipulate it is to use the function ut_difftime. */
- ib_time_t
- ut_time(void);
- /*=========*/
- /**************************************************************
- Returns the difference of two times in seconds. */
- double
- ut_difftime(
- /*========*/
- /* out: time2 - time1 expressed in seconds */
- ib_time_t time2, /* in: time */
- ib_time_t time1); /* in: time */
- /*****************************************************************
- Runs an idle loop on CPU. The argument gives the desired delay
- in microseconds on 100 MHz Pentium + Visual C++. */
- ulint
- ut_delay(
- /*=====*/
- /* out: dummy value */
- ulint delay); /* in: delay in microseconds on 100 MHz Pentium */
- /*****************************************************************
- Prints the contents of a memory buffer in hex and ascii. */
- void
- ut_print_buf(
- /*=========*/
- byte* buf, /* in: memory buffer */
- ulint len); /* in: length of the buffer */
- /*****************************************************************
- Prints the contents of a memory buffer in hex and ascii. */
- ulint
- ut_sprintf_buf(
- /*===========*/
- /* out: printed length in bytes */
- char* str, /* in: buffer to print to */
- byte* buf, /* in: memory buffer */
- ulint len); /* in: length of the buffer */
- #ifndef UNIV_NONINL
- #include "ut0ut.ic"
- #endif
- #endif