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  11 .TH fpclassify 3M "12 Jul 2006" "SunOS 5.11" "Mathematical Library Functions"
  12 .SH NAME
  13 fpclassify \- classify real floating type
  14 .SH SYNOPSIS
  15 .LP
  16 .nf
  17 c99 [ \fIflag\fR... ] \fIfile\fR... \fB-lm\fR [ \fIlibrary\fR... ]
  18 #include <math.h>
  19 
  20 \fBint\fR \fBfpclassify\fR(\fBreal-floating\fR \fIx\fR);
  21 .fi
  22 
  23 .SH DESCRIPTION
  24 .sp
  25 .LP
  26 The \fBfpclassify()\fR macro classifies its argument value as NaN, infinite,
  27 normal, subnormal, or zero. First, an argument represented in a format wider
  28 than its semantic type is converted to its semantic type. Then classification
  29 is based on the type of the argument.
  30 .SH RETURN VALUES
  31 .sp
  32 .LP
  33 The \fBfpclassify()\fR macro returns the value of the number classification
  34 macro appropriate to the value of its argument.
  35 .SH ERRORS
  36 .sp
  37 .LP
  38 No errors are defined.
  39 .SH ATTRIBUTES
  40 .sp
  41 .LP
  42 See \fBattributes\fR(5) for descriptions of the following attributes:
  43 .sp
  44 
  45 .sp
  46 .TS
  47 tab() box;
  48 cw(2.75i) |cw(2.75i) 
  49 lw(2.75i) |lw(2.75i) 
  50 .
  51 ATTRIBUTE TYPEATTRIBUTE VALUE
  52 _
  53 Interface StabilityStandard
  54 _
  55 MT-LevelMT-Safe
  56 .TE
  57 
  58 .SH SEE ALSO
  59 .sp
  60 .LP
  61 \fBisfinite\fR(3M), \fBisinf\fR(3M), \fBisnan\fR(3M), \fBisnormal\fR(3M),
  62 \fBmath.h\fR(3HEAD), \fBsignbit\fR(3M), \fBattributes\fR(5), \fBstandards\fR(5)