#!/usr/linguist/bin/perl # # make-logtab # # Generate a table of logarithms of 2 in various bases, for use in # estimating the output sizes of various bases. # ## The contents of this file are subject to the Mozilla Public ## License Version 1.1 (the "License"); you may not use this file ## except in compliance with the License. You may obtain a copy of ## the License at http://www.mozilla.org/MPL/ ## ## Software distributed under the License is distributed on an "AS ## IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or ## implied. See the License for the specific language governing ## rights and limitations under the License. ## ## The Original Code is the MPI Arbitrary Precision Integer Arithmetic ## library. ## ## The Initial Developer of the Original Code is ## Michael J. Fromberger ## ## Portions created by Michael J. Fromberger are ## Copyright (C) 1998, 2000 Michael J. Fromberger. All Rights Reserved ## ## Contributor(s): ## ## Alternatively, the contents of this file may be used under the ## terms of the GNU General Public License Version 2 or later (the ## "GPL"), in which case the provisions of the GPL are applicable ## instead of those above. If you wish to allow use of your ## version of this file only under the terms of the GPL and not to ## allow others to use your version of this file under the MPL, ## indicate your decision by deleting the provisions above and ## replace them with the notice and other provisions required by ## the GPL. If you do not delete the provisions above, a recipient ## may use your version of this file under either the MPL or the ## GPL. # # $Id$ $ARRAYNAME = $ENV{'ARRAYNAME'} || "s_logv_2"; $ARRAYTYPE = $ENV{'ARRAYTYPE'} || "float"; printf("const %s %s[] = {\n %0.9ff, %0.9ff, ", $ARRAYTYPE, $ARRAYNAME, 0, 0); $brk = 2; for($ix = 2; $ix < 64; $ix++) { printf("%0.9ff, ", (log(2)/log($ix))); $brk = ($brk + 1) & 3; if(!$brk) { printf(" /* %2d %2d %2d %2d */\n ", $ix - 3, $ix - 2, $ix - 1, $ix); } } printf("%0.9ff\n};\n\n", (log(2)/log($ix))); exit 0;