개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

ilogb(3m)

Mathematical Library Functions                                       ilogb(3M)



NAME
       ilogb, ilogbf, ilogbl - return an unbiased exponent

SYNOPSIS
       c99 [ flag... ] file... -lm [ library... ]
       #include <math.h>

       int ilogb(double x);


       int ilogbf(float x);


       int ilogbl(long double x);


       cc [ flag... ] file... -lm [ library... ]
       #include <math.h>

       int ilogb(double x);


       int ilogbf(float x);


       int ilogbl(long double x);

DESCRIPTION
       These functions return the exponent part of their argument x. Formally,
       the return value is the integral part of log(r)| x | as a signed  inte‐
       gral  value,  for  non-zero  x,  where  r is the radix of the machine's
       floating point arithmetic, which is the value of FLT_RADIX  defined  in
       <float.h>.

RETURN VALUES
       Upon successful completion, these functions return the exponent part of
       x as a signed integer value. They are equivalent to calling the  corre‐
       sponding logb(3M) function and casting the returned value to type int.


       If x is 0, the value FP_ILOGB0 is returned. For SUSv3-conforming appli‐
       cations compiled with the c99 compiler  driver  (see  standards(7)),  a
       domain error occurs.


       If  x  is  ±Inf,  the  value  INT_MAX is returned. For SUSv3-conforming
       applications compiled with the c99  compiler  driver,  a  domain  error
       occurs.


       If  x  is  NaN, the value FP_ILOGBNAN is returned. For SUSv3-conforming
       applications compiled with the c99  compiler  driver,  a  domain  error
       occurs.

ERRORS
       These functions will fail if:

       Domain Error    The x argument is zero, NaN, or ±Inf.

                       If   the   integer   expression   (math_errhandling   &
                       MATH_ERREXCEPT) is non-zero, then the invalid floating-
                       point exception is raised.


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i)


       ATTRIBUTE  TYPEATTRIBUTE  VALUE _ Interface StabilityCommitted _ Avail‐
       abilitysystem/library/math  _  MT-LevelMT-Safe  _   StandardSee   stan‐
       dards(7).


SEE ALSO
       limits.h(3HEAD),  math.h(3HEAD),  feclearexcept(3M),  fetestexcept(3M),
       logb(3M), scalb(3M), attributes(7), standards(7)



Solaris 11.4                     27 Sept 2016                        ilogb(3M)