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NetBSD 6.1.5 - man page for isgreater (netbsd section 3)

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ISGREATER(3)			   BSD Library Functions Manual 		     ISGREATER(3)

NAME
     isgreater, isgreaterequal, isless, islessequal, islessgreater, isunordered -- compare two
     floating-point numbers

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <math.h>

     int
     isgreater(real-floating x, real-floating y);

     int
     isgreaterequal(real-floating x, real-floating y);

     int
     isless(real-floating x, real-floating y);

     int
     islessequal(real-floating x, real-floating y);

     int
     islessgreater(real-floating x, real-floating y);

     int
     isunordered(real-floating x, real-floating y);

DESCRIPTION
     Each of the macros isgreater(), isgreaterequal(), isless(), islessequal(), and
     islessgreater() take arguments x and y and return a non-zero value if and only if its nomi-
     nal relation on x and y is true.  These macros always return zero if either argument is not
     a number (NaN), but unlike the corresponding C operators, they never raise a floating point
     exception.

     The isunordered() macro takes arguments x and y and returns non-zero if and only if neither
     x nor y are NaNs.	For any pair of floating-point values, one of the relationships (less,
     greater, equal, unordered) holds.

SEE ALSO
     fpclassify(3), math(3), signbit(3)

STANDARDS
     The isgreater(), isgreaterequal(), isless(), islessequal(), islessgreater(), and
     isunordered() macros conform to ISO/IEC 9899:1999 (``ISO C99'').

HISTORY
     The relational macros described above first appeared in NetBSD 5.0.

BSD					February 12, 2003				      BSD
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