man3/clog10.3

   1 '\" t
   2 .\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
   3 .\"
   4 .\" SPDX-License-Identifier: GPL-1.0-or-later
   5 .\"
   6 .TH clog10 3 (date) "Linux man-pages (unreleased)"
   7 .SH NAME
   8 clog10, clog10f, clog10l \- base-10 logarithm of a complex number
   9 .SH LIBRARY
  10 Math library
  11 .RI ( libm ", " \-lm )
  12 .SH SYNOPSIS
  13 .nf
  14 .BR "#define _GNU_SOURCE" "         /* See feature_test_macros(7) */"
  15 .B #include <complex.h>
  16 .PP
  17 .BI "double complex clog10(double complex " z );
  18 .BI "float complex clog10f(float complex " z );
  19 .BI "long double complex clog10l(long double complex " z );
  20 .fi
  21 .SH DESCRIPTION
  22 The call
  23 .I clog10(z)
  24 is equivalent to:
  25 .PP
  26 .in +4n
  27 .EX
  28 clog(z)/log(10)
  29 .EE
  30 .in
  31 .PP
  32 or equally:
  33 .PP
  34 .in +4n
  35 .EX
  36 log10(cabs(c)) + I * carg(c) / log(10)
  37 .EE
  38 .in
  39 .PP
  40 The other functions perform the same task for
  41 .I float
  42 and
  43 .IR "long double" .
  44 .PP
  45 Note that
  46 .I z
  47 close to zero will cause an overflow.
  48 .SH ATTRIBUTES
  49 For an explanation of the terms used in this section, see
  50 .BR attributes (7).
  51 .TS
  52 allbox;
  53 lbx lb lb
  54 l l l.
  55 Interface       Attribute       Value
  56 T{
  57 .na
  58 .nh
  59 .BR clog10 (),
  60 .BR clog10f (),
  61 .BR clog10l ()
  62 T}      Thread safety   MT-Safe
  63 .TE
  64 .sp 1
  65 .SH STANDARDS
  66 GNU.
  67 .SH HISTORY
  68 glibc 2.1.
  69 .PP
  70 The identifiers are reserved for future use in C99 and C11.
  71 .SH SEE ALSO
  72 .BR cabs (3),
  73 .BR cexp (3),
  74 .BR clog (3),
  75 .BR clog2 (3),
  76 .BR complex (7)