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/**********************************************************************
Various utilities
(c) 1994, 1995 Innobase Oy
Created 1/20/1994 Heikki Tuuri
***********************************************************************/
#ifndef ut0ut_h
#define ut0ut_h
#include "univ.i"
#include <time.h>
#ifndef MYSQL_SERVER
#include <ctype.h>
#endif
typedef time_t ib_time_t;
/************************************************************
Uses vsprintf to emulate sprintf so that the function always returns
the printed length. Apparently in some old SCO Unixes sprintf did not
return the printed length but a pointer to the end of the printed string. */
ulint
ut_sprintf(
/*=======*/
char* buf, /* in/out: buffer where to print */
const char* format, /* in: format of prints */
...); /* in: arguments to be printed */
/************************************************************
Gets the high 32 bits in a ulint. That is makes a shift >> 32,
but since there seem to be compiler bugs in both gcc and Visual C++,
we do this by a special conversion. */
ulint
ut_get_high32(
/*==========*/
/* out: a >> 32 */
ulint a); /* in: ulint */
/**********************************************************
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. */
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 */
/**************************************************************
Prints a timestamp to a file. */
void
ut_print_timestamp(
/*===============*/
FILE* file); /* in: file where to print */
/**************************************************************
Sprintfs a timestamp to a buffer. */
void
ut_sprintf_timestamp(
/*=================*/
char* buf); /* in: buffer where to sprintf */
/**************************************************************
Returns current year, month, day. */
void
ut_get_year_month_day(
/*==================*/
ulint* year, /* out: current year */
ulint* month, /* out: month */
ulint* day); /* out: day */
/*****************************************************************
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
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