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add log2(x [,eps]) builtin function

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Added log2(x [,eps]) builtin function.  When x is an integer
power of 2, log2(x) will return an integer, otherwise it will
return the equivalent of ln(x)/ln(2).
This commit is contained in:
Landon Curt Noll
2023-08-27 19:02:37 -07:00
parent 56c568060a
commit 4e5fcc8812
15 changed files with 429 additions and 71 deletions
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3
cmath.h
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@@ -1,7 +1,7 @@
/*
* cmath - data structures for extended precision complex arithmetic
*
* Copyright (C) 1999-2007,2014 David I. Bell
* Copyright (C) 1999-2007,2014,2023 David I. Bell and Landon Curt Noll
*
* Calc is open software; you can redistribute it and/or modify it under
* the terms of the version 2.1 of the GNU Lesser General Public License
@@ -97,6 +97,7 @@ E_FUNC COMPLEX *c_root(COMPLEX *c, NUMBER *q, NUMBER *epsilon);
E_FUNC COMPLEX *c_exp(COMPLEX *c, NUMBER *epsilon);
E_FUNC COMPLEX *c_ln(COMPLEX *c, NUMBER *epsilon);
E_FUNC COMPLEX *c_log(COMPLEX *c, NUMBER *epsilon);
E_FUNC COMPLEX *c_log2(COMPLEX *c, NUMBER *epsilon);
E_FUNC COMPLEX *c_cos(COMPLEX *c, NUMBER *epsilon);
E_FUNC COMPLEX *c_sin(COMPLEX *c, NUMBER *epsilon);
E_FUNC COMPLEX *c_cosh(COMPLEX *c, NUMBER *epsilon);