ISCXINF 3CW "28 December 2009" "mathcw-1.00"

Table of contents


NAME

iscxinff, iscxinf, iscxinfl, iscxinfw, iscxinfq, iscxinfll, iscxinfdf, iscxinfd, iscxinfdl, iscxinfdll - test for complex infinity

SYNOPSIS

cc [ flags ] -I/usr/local/include file(s) -L/usr/local/lib -lmcw [ ... ]

#include <mathcw.h>

extern int iscxinff (cx_float z);

extern int iscxinf (cx_double z);

extern int iscxinfl (cx_long double z);

extern int iscxinfw (cx_float80 z);

extern int iscxinfq (cx_float128 z);

extern int iscxinfll (cx_long_long_double z);

extern int iscxinfdf (cx_decimal_float z);

extern int iscxinfd (cx_decimal_double z);

extern int iscxinfdl (cx_decimal_long_double z);

extern int iscxinfdll (cx_decimal_long_long_double z);

NB: Functions with prototypes containing underscores in type names may be available only with certain extended compilers.


DESCRIPTION

Determine whether either the real or the imaginary component of the argument is +Infinity or -Infinity.

The C99 Standard, Annex G.3, requires that a complex value is infinite if at least one component is Infinity, even if the other is a NaN.


RETURN VALUES

Return 1 if the argument is +Infinity or -Infinity, and 0 otherwise.

ERRORS

None.

SEE ALSO

fpclassify(3CW), iscinf(3CW), iscnan(3CW), iscxnan(3CW), isfinite(3CW), isinf(3CW), isnan(3CW), isnormal(3CW), issubnormal(3CW).