Manual Pages for UNIX Operating System command usage for man isnand

Standard C Library Functions                           isnand(3C)



NAME
     isnand, isnanf, finite, fpclass, unordered - determine  type
     of floating-point number

SYNOPSIS
     #include 

     int isnand(double dsrc);


     int isnanf(float fsrc);


     int finite(double dsrc);


     fpclass_t fpclass(double dsrc);


     int unordered(double dsrc1, double dsrc2);


DESCRIPTION
     The isnand() and isnanf() functions return TRUE (1)  if  the
     argument dsrc or fsrc is a NaN;  otherwise they return FALSE
     (0).


     The fpclass() function returns one of the following  classes
     to which dsrc belongs:

     FP_SNAN       signaling NaN


     FP_QNAN       quiet NaN


     FP_NINF       negative infinity


     FP_PINF       positive infinity


     FP_NDENORM    negative denormalized non-zero


     FP_PDENORM    positive denormalized non-zero


     FP_NZERO      negative zero





SunOS 5.11          Last change: 15 Jun 2004                    1






Standard C Library Functions                           isnand(3C)



     FP_PZERO      positive zero


     FP_NNORM      negative normalized non-zero


     FP_PNORM      positive normalized non-zero



     The finite() function returns TRUE (1) if the argument  dsrc
     is  neither  infinity  nor  NaN; otherwise it returns  FALSE
     (0).


     The unordered() function returns TRUE (1) if one of its  two
     arguments  is  unordered with respect to the other argument.
     This is equivalent to reporting whether either  argument  is
     NaN.  If neither argument is NaN, FALSE (0) is returned.


     None of these functions generates  an  exception,  even  for
     signaling NaNs.

RETURN VALUES
     See DESCRIPTION.

ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | MT-Level                    | MT-Safe                     |
    |_____________________________|_____________________________|


SEE ALSO
     fpgetround(3C), isnan(3M), attributes(5)













SunOS 5.11          Last change: 15 Jun 2004                    2