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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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5
calcerr.tbl
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@@ -1,7 +1,7 @@
#
# calcerr - error codes and messages
#
# Copyright (C) 1999-2006,2021 Ernest Bowen
# Copyright (C) 1999-2006,2021,2023 Ernest Bowen 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
@@ -542,3 +542,6 @@ E_HMS2H1 Non-real-number arguments 1, 2 or 3 for hms2h
E_HMS2H2 Invalid rounding arg 4 for hms2h
E_HM2H1 Non-real-number arguments 1 or 2 for hm2h
E_HM2H2 Invalid rounding arg 4 for hm2h
E_LOG2_1 Bad epsilon argument for log2
E_LOG2_2 Non-numeric first argument for log2
E_LOG2_3 Cannot calculate log2 for this value