Mathematical Library Functions                     fpclassify(3M)



NAME
     fpclassify - classify real floating type

SYNOPSIS
     c99 [ flag... ] file... -lm [ library... ]
     #include 

     int fpclassify(real-floating x);


DESCRIPTION
     The fpclassify() macro classifies its argument value as NaN,
     infinite,  normal,  subnormal,  or  zero. First, an argument
     represented in a format wider than its semantic type is con-
     verted to its semantic type. Then classification is based on
     the type of the argument.

RETURN VALUES
     The fpclassify() macro returns the value of the number clas-
     sification macro appropriate to the value of its argument.

ERORS
     No errors are defined.

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



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Interface Stability          Standard                    
    
     MT-Level                     MT-Safe                     
    


SEE ALSO
     isfinite(3M),    isinf(3M),     isnan(3M),     isnormal(3M),
     math.h(3HEAD), signbit(3M), attributes(5), standards(5)













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