fpclassify(3) - NetBSD Manual Pages

FPCLASSIFY(3)           NetBSD Library Functions Manual          FPCLASSIFY(3)


NAME
fpclassify -- classify real floating type
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <math.h> int fpclassify(real-floating x);
DESCRIPTION
The fpclassify() macro performs classification of its argument x. An argument represented in a format wider than its semantic type is con- verted to its semantic type first. The classification is then based on the type of the argument. IEEE 754 FP_INFINITE infinity, either positive or negative FP_NAN not-a-number (``NaN'') FP_NORMAL normal FP_SUBNORMAL subnormal FP_ZERO zero VAX FP_ROP reserved operand (``ROP'') FP_DIRTYZERO dirty zero FP_NORMAL finite FP_ZERO true zero
RETURN VALUES
The fpclassify() macro returns the value of the number classification macro appropriate to its argument x as described above.
ERRORS
No errors are defined.
SEE ALSO
isfinite(3), isnormal(3), math(3), signbit(3)
STANDARDS
The fpclassify() macro conforms to ISO/IEC 9899:1999 (``ISO C99''). NetBSD 9.3 January 14, 2004 NetBSD 9.3

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