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.

ldexp(3m)

Mathematical Library Functions                                       ldexp(3M)



NAME
       ldexp, ldexpf, ldexpl - load exponent of a floating point number

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

       double ldexp(double x, int exp);


       float ldexpf(float x, int exp);


       long double ldexpl(long double x, int exp);

DESCRIPTION
       These functions computes the quantity x* 2^exp.

RETURN VALUES
       Upon  successful  completion,  these functions return x multiplied by 2
       raised to the power exp.


       If these functions would cause  overflow,  a  range  error  occurs  and
       ldexp(),  ldexpf(),  and  ldexpl()  return  ±HUGE_VAL,  ±HUGE_VALF, and
       ±HUGE_VALL (according to the sign of x), respectively.


       If x is NaN, a NaN is returned.


       If x is ±0 or ±Inf, x is returned.


       If exp is 0, x is returned.

ERRORS
       These functions will fail if:

       Range Error    The result overflows.

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

                      The ldexp() function sets errno to ERANGE if the  result
                      overflows.


USAGE
       An  application  wanting to check for exceptions should call feclearex‐
       cept(FE_ALL_EXCEPT) before  calling  these  functions.  On  return,  if
       fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is
       non-zero, an exception has been raised. An  application  should  either
       examine the return value or check the floating point exception flags to
       detect exceptions.


       An application can also set errno  to  0  before  calling  ldexp().  On
       return,  if  errno is non-zero, an error has occurred. The ldexpf() and
       ldexpl() functions do not set errno.

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
       modf(3M), frexp(3M), isnan(3M), standards(7), attributes(7)



Solaris 11.4                     27 Sept 2016                        ldexp(3M)