finitef man page on BSDi

Man page or keyword search:  
man Server   6284 pages
apropos Keyword Search (all sections)
Output format
BSDi logo
[printable version]

IEEE(3)			    BSD Programmer's Manual		       IEEE(3)

NAME
     copysign, copysignf, finite, finitef, ilogb, ilogbf, nextafter,
     nextafterf, remainder, remainderf, scalbn, scalbnf - Functions for IEEE
     754 arithmetic

SYNOPSIS
     #include <math.h>

     double
     copysign(double x, double y);

     float
     copysignf(float x, float y);

     int
     finite(double x);

     int
     finitef(float x);

     int
     ilogb(double x);

     int
     ilogbf(float x);

     double
     nextafter(double x, double y);

     float
     nextafterf(float x, float y);

     double
     remainder(double x, double y);

     float
     remainderf(float x, float y);

     double
     scalbn(double x, int n);

     float
     scalbnf(float x, int n);

DESCRIPTION
     These functions are required or recommended by IEEE 754.

     copysign() and copysignf() return x with its sign changed to y's.

     finite() and finitef() return the value 1 just when -infinity < x < +in-
     finity; otherwise a zero is returned (when |x| = infinity or x is NaN).

     ilogb() and ilogbf() return x's exponent n, in integer format.
     ilogb(+-infinity) returns INT_MAX and ilogb(0) returns INT_MIN.

     nextafter() and nextafterf() return the next machine representable number
     from x in direction y.

     remainder() and remainderf() return the remainder r := x - n*y where n is
     the integer nearest the exact value of x/y; moreover if |n - x/y| = 1/2
     then n is even.  Consequently the remainder is computed exactly and |r|
     <= |y|/2. But remainder(x, 0) and remainder(infinity, 0) are invalid op-
     erations that produce a NaN.

     scalbn() and scalbnf() return x*(2**n) computed by exponent manipulation.

ERRORS
     For remainder() and remainderf(), if y = 0 then:

     _IEEE_    The return value is NaN.
     _POSIX_   Same as _IEEE_, but errno is also set to EDOM.
     _XOPEN_   Same as _POSIX_, but errno is only set if matherr(3) returns 0.
	       The exception type is DOMAIN.
     _SVID_    Same as _XOPEN_, and a message is printed to stderr if errno is
	       set.

SEE ALSO
     math(3)

HISTORY
     The ieee functions appeared in 4.3BSD.

BSDI BSD/OS			 March 4, 1998				     2
[top]

List of man pages available for BSDi

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net