mirror of https://github.com/mkerrisk/man-pages
45 lines
984 B
Groff
45 lines
984 B
Groff
.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
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.\"
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.\" %%%LICENSE_START(GPL_NOVERSION_ONELINE)
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.\" Distributed under GPL
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.\" %%%LICENSE_END
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.\"
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.TH CLOG2 3 2020-06-09 "" "Linux Programmer's Manual"
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.SH NAME
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clog2, clog2f, clog2l \- base-2 logarithm of a complex number
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.SH SYNOPSIS
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.B #include <complex.h>
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.PP
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.BI "double complex clog2(double complex " z );
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.br
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.BI "float complex clog2f(float complex " z );
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.br
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.BI "long double complex clog2l(long double complex " z );
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.\" .PP
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.\" Link with \fI\-lm\fP.
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.SH DESCRIPTION
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The call
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.I clog2(z)
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is equivalent to
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.IR clog(z)/log(2) .
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.PP
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The other functions perform the same task for
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.I float
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and
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.IR "long double" .
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.PP
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Note that
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.I z
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close to zero will cause an overflow.
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.SH CONFORMING TO
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These function names are reserved for future use in C99.
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.PP
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Not yet in glibc, as at version 2.19.
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.\" But reserved in NAMESPACE.
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.SH SEE ALSO
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.BR cabs (3),
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.BR cexp (3),
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.BR clog (3),
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.BR clog10 (3),
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.BR complex (7)
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