Math-Round-0.08/000755 000765 000024 00000000000 14511227652 013660 5ustar00neilbstaff000000 000000 Math-Round-0.08/LICENSE000644 000765 000024 00000043661 14511227652 014677 0ustar00neilbstaff000000 000000 This software is copyright (c) 2000 by Geoffrey Rommel. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. Terms of the Perl programming language system itself a) the GNU General Public License as published by the Free Software Foundation; either version 1, or (at your option) any later version, or b) the "Artistic License" --- The GNU General Public License, Version 1, February 1989 --- This software is Copyright (c) 2000 by Geoffrey Rommel. This is free software, licensed under: The GNU General Public License, Version 1, February 1989 GNU GENERAL PUBLIC LICENSE Version 1, February 1989 Copyright (C) 1989 Free Software Foundation, Inc. 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The license agreements of most software companies try to keep users at the mercy of those companies. By contrast, our General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. The General Public License applies to the Free Software Foundation's software and to any other program whose authors commit to using it. You can use it for your programs, too. When we speak of free software, we are referring to freedom, not price. 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The End Math-Round-0.08/Changes000644 000765 000024 00000002604 14511227652 015155 0ustar00neilbstaff000000 000000 Revision history for Perl extension Math::Round. 0.08 2023-10-10 NEILB - NEILB has taken over maintenance - Added usual directory structure with lib/ and t/ - Converted test.pl to traditional Test::More suite - Added LICENSE to doc and ensured metadata has license. I emailed Geoffrey to request this change, and ended up getting co-maint to make this happen :-) - Dropped `use vars`, replaced with `our` and `use warnings`. - Switched to dzil 0.07 2015-01-02 GROMMEL - Perl 5.22 exports POSIX::round, so "use POSIX" had to be changed to "use POSIX ()". Thanks to Jarkko Hietaniemi and Slaven Rezic for the tip. 0.06 2006-11-29 GROMMEL - Streamlined the code. Thanks to Richard Jelinek of PetaMem. - Made $half a package variable. Thanks to Ruud H. G. van Tol for pointing out some peculiarities of the rounding. 0.05 2002-04-22 GROMMEL - Added nlowmult and nhimult at the suggestion of Tielman de Villiers. 0.04 2002-03-04 GROMMEL - Added nearest_ceil and nearest_floor at the suggestion of Charlie Kim (Stanford). 0.03 2001-09-17 GROMMEL - Now using a value for one-half that is slightly larger than 0.5, to thwart the floating-point units. Thanks to Paul Rohwer for pointing this out. 0.02 2001-03-08 GROMMEL - Small cosmetic changes (e-mail address and such). 0.01 2000-10-25 GROMMEL - original version; created by h2xs 1.18 Math-Round-0.08/MANIFEST000644 000765 000024 00000000273 14511227652 015013 0ustar00neilbstaff000000 000000 # This file was automatically generated by Dist::Zilla::Plugin::Manifest v6.025. Changes LICENSE MANIFEST META.json META.yml Makefile.PL README dist.ini lib/Math/Round.pm t/02-original.t Math-Round-0.08/t/000755 000765 000024 00000000000 14511227652 014123 5ustar00neilbstaff000000 000000 Math-Round-0.08/README000644 000765 000024 00000000561 14511227652 014542 0ustar00neilbstaff000000 000000 This archive contains the distribution Math-Round, version 0.08: Perl extension for rounding numbers This software is copyright (c) 2000 by Geoffrey Rommel. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. This README file was generated by Dist::Zilla::Plugin::Readme v6.025. Math-Round-0.08/META.yml000644 000765 000024 00000001417 14511227652 015134 0ustar00neilbstaff000000 000000 --- abstract: 'Perl extension for rounding numbers' author: - 'Geoffrey Rommel ' build_requires: Test::More: '0' configure_requires: ExtUtils::MakeMaker: '0' dynamic_config: 0 generated_by: 'Dist::Zilla version 6.025, CPAN::Meta::Converter version 2.150010' license: perl meta-spec: url: http://module-build.sourceforge.net/META-spec-v1.4.html version: '1.4' name: Math-Round requires: Exporter: '0' POSIX: '0' parent: '0' perl: '5.006' strict: '0' vars: '0' warnings: '0' resources: homepage: https://github.com/neilb/Math-Round repository: https://github.com/neilb/Math-Round.git version: '0.08' x_generated_by_perl: v5.32.1 x_serialization_backend: 'YAML::Tiny version 1.73' x_spdx_expression: 'Artistic-1.0-Perl OR GPL-1.0-or-later' Math-Round-0.08/lib/000755 000765 000024 00000000000 14511227652 014426 5ustar00neilbstaff000000 000000 Math-Round-0.08/Makefile.PL000644 000765 000024 00000002270 14511227652 015633 0ustar00neilbstaff000000 000000 # This file was automatically generated by Dist::Zilla::Plugin::MakeMaker v6.025. use strict; use warnings; use 5.006; use ExtUtils::MakeMaker; my %WriteMakefileArgs = ( "ABSTRACT" => "Perl extension for rounding numbers", "AUTHOR" => "Geoffrey Rommel ", "CONFIGURE_REQUIRES" => { "ExtUtils::MakeMaker" => 0 }, "DISTNAME" => "Math-Round", "LICENSE" => "perl", "MIN_PERL_VERSION" => "5.006", "NAME" => "Math::Round", "PREREQ_PM" => { "Exporter" => 0, "POSIX" => 0, "parent" => 0, "strict" => 0, "vars" => 0, "warnings" => 0 }, "TEST_REQUIRES" => { "Test::More" => 0 }, "VERSION" => "0.08", "test" => { "TESTS" => "t/*.t" } ); my %FallbackPrereqs = ( "Exporter" => 0, "POSIX" => 0, "Test::More" => 0, "parent" => 0, "strict" => 0, "vars" => 0, "warnings" => 0 ); unless ( eval { ExtUtils::MakeMaker->VERSION(6.63_03) } ) { delete $WriteMakefileArgs{TEST_REQUIRES}; delete $WriteMakefileArgs{BUILD_REQUIRES}; $WriteMakefileArgs{PREREQ_PM} = \%FallbackPrereqs; } delete $WriteMakefileArgs{CONFIGURE_REQUIRES} unless eval { ExtUtils::MakeMaker->VERSION(6.52) }; WriteMakefile(%WriteMakefileArgs); Math-Round-0.08/META.json000644 000765 000024 00000002533 14511227652 015304 0ustar00neilbstaff000000 000000 { "abstract" : "Perl extension for rounding numbers", "author" : [ "Geoffrey Rommel " ], "dynamic_config" : 0, "generated_by" : "Dist::Zilla version 6.025, CPAN::Meta::Converter version 2.150010", "license" : [ "perl_5" ], "meta-spec" : { "url" : "http://search.cpan.org/perldoc?CPAN::Meta::Spec", "version" : 2 }, "name" : "Math-Round", "prereqs" : { "configure" : { "requires" : { "ExtUtils::MakeMaker" : "0" } }, "runtime" : { "requires" : { "Exporter" : "0", "POSIX" : "0", "parent" : "0", "perl" : "5.006", "strict" : "0", "vars" : "0", "warnings" : "0" } }, "test" : { "requires" : { "Test::More" : "0" } } }, "release_status" : "stable", "resources" : { "homepage" : "https://github.com/neilb/Math-Round", "repository" : { "type" : "git", "url" : "https://github.com/neilb/Math-Round.git", "web" : "https://github.com/neilb/Math-Round" } }, "version" : "0.08", "x_generated_by_perl" : "v5.32.1", "x_serialization_backend" : "Cpanel::JSON::XS version 4.37", "x_spdx_expression" : "Artistic-1.0-Perl OR GPL-1.0-or-later" } Math-Round-0.08/dist.ini000644 000765 000024 00000000400 14511227652 015316 0ustar00neilbstaff000000 000000 name = Math-Round author = Geoffrey Rommel license = Perl_5 copyright_holder = Geoffrey Rommel copyright_year = 2000 version = 0.08 [@Basic] [PkgVersion] [AutoPrereqs] [MetaJSON] [GithubMeta] [Git::Tag] tag_message= [Git::Push] Math-Round-0.08/lib/Math/000755 000765 000024 00000000000 14511227652 015317 5ustar00neilbstaff000000 000000 Math-Round-0.08/lib/Math/Round.pm000644 000765 000024 00000023414 14511227652 016750 0ustar00neilbstaff000000 000000 package Math::Round; $Math::Round::VERSION = '0.08'; use 5.006; use strict; use warnings; use POSIX (); use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS); use parent 'Exporter'; our @EXPORT = qw/ round nearest /; our @EXPORT_OK = qw/ round nearest round_even round_odd round_rand nearest_ceil nearest_floor nearest_rand nlowmult nhimult /; our %EXPORT_TAGS = ( all => [ @EXPORT_OK ] ); #--- Default value for "one-half". This is the lowest value that #--- gives acceptable results for test #6 in test.pl. See the pod #--- for more information. our $half = 0.50000000000008; sub round { my $x; my @res = map { if ($_ >= 0) { POSIX::floor($_ + $Math::Round::half); } else { POSIX::ceil($_ - $Math::Round::half); } } @_; return (wantarray) ? @res : $res[0]; } sub round_even { my @res = map { my ($sign, $in, $fr) = _sepnum($_); if ($fr == 0.5) { $sign * (($in % 2 == 0) ? $in : $in + 1); } else { $sign * POSIX::floor(abs($_) + $Math::Round::half); } } @_; return (wantarray) ? @res : $res[0]; } sub round_odd { my @res = map { my ($sign, $in, $fr) = _sepnum($_); if ($fr == 0.5) { $sign * (($in % 2 == 1) ? $in : $in + 1); } else { $sign * POSIX::floor(abs($_) + $Math::Round::half); } } @_; return (wantarray) ? @res : $res[0]; } sub round_rand { my @res = map { my ($sign, $in, $fr) = _sepnum($_); if ($fr == 0.5) { $sign * ((rand(4096) < 2048) ? $in : $in + 1); } else { $sign * POSIX::floor(abs($_) + $Math::Round::half); } } @_; return (wantarray) ? @res : $res[0]; } #--- Separate a number into sign, integer, and fractional parts. #--- Return as a list. sub _sepnum { my $x = shift; my $sign = ($x >= 0) ? 1 : -1; $x = abs($x); my $i = int($x); return ($sign, $i, $x - $i); } #------ "Nearest" routines (round to a multiple of any number) sub nearest { my $targ = abs(shift); my @res = map { if ($_ >= 0) { $targ * int(($_ + $Math::Round::half * $targ) / $targ); } else { $targ * POSIX::ceil(($_ - $Math::Round::half * $targ) / $targ); } } @_; return (wantarray) ? @res : $res[0]; } # In the next two functions, the code for positive and negative numbers # turns out to be the same. For negative numbers, the technique is not # exactly obvious; instead of floor(x+0.5), we are in effect taking # ceiling(x-0.5). sub nearest_ceil { my $targ = abs(shift); my @res = map { $targ * POSIX::floor(($_ + $Math::Round::half * $targ) / $targ) } @_; return wantarray ? @res : $res[0]; } sub nearest_floor { my $targ = abs(shift); my @res = map { $targ * POSIX::ceil(($_ - $Math::Round::half * $targ) / $targ) } @_; return wantarray ? @res : $res[0]; } sub nearest_rand { my $targ = abs(shift); my @res = map { my ($sign, $in, $fr) = _sepnear($_, $targ); if ($fr == 0.5 * $targ) { $sign * $targ * ((rand(4096) < 2048) ? $in : $in + 1); } else { $sign * $targ * int((abs($_) + $Math::Round::half * $targ) / $targ); } } @_; return (wantarray) ? @res : $res[0]; } #--- Next lower multiple sub nlowmult { my $targ = abs(shift); my @res = map { $targ * POSIX::floor($_ / $targ) } @_; return wantarray ? @res : $res[0]; } #--- Next higher multiple sub nhimult { my $targ = abs(shift); my @res = map { $targ * POSIX::ceil($_ / $targ) } @_; return wantarray ? @res : $res[0]; } #--- Separate a number into sign, "integer", and "fractional" parts #--- for the 'nearest' calculation. Return as a list. sub _sepnear { my ($x, $targ) = @_; my $sign = ($x >= 0) ? 1 : -1; $x = abs($x); my $i = int($x / $targ); return ($sign, $i, $x - $i*$targ); } 1; __END__ =head1 NAME Math::Round - Perl extension for rounding numbers =head1 SYNOPSIS use Math::Round qw(...those desired... or :all); $rounded = round($scalar); @rounded = round(LIST...); $rounded = nearest($target, $scalar); @rounded = nearest($target, LIST...); # and other functions as described below =head1 DESCRIPTION B supplies functions that will round numbers in different ways. The functions B and B are exported by default; others are available as described below. "use ... qw(:all)" exports all functions. =head1 FUNCTIONS =over 2 =item B LIST Rounds the number(s) to the nearest integer. In scalar context, returns a single value; in list context, returns a list of values. Numbers that are halfway between two integers are rounded "to infinity"; i.e., positive values are rounded up (e.g., 2.5 becomes 3) and negative values down (e.g., -2.5 becomes -3). Starting in Perl 5.22, the POSIX module by default exports all functions, including one named "round". If you use both POSIX and this module, exercise due caution. =item B LIST Rounds the number(s) to the nearest integer. In scalar context, returns a single value; in list context, returns a list of values. Numbers that are halfway between two integers are rounded to the nearest even number; e.g., 2.5 becomes 2, 3.5 becomes 4, and -2.5 becomes -2. =item B LIST Rounds the number(s) to the nearest integer. In scalar context, returns a single value; in list context, returns a list of values. Numbers that are halfway between two integers are rounded to the nearest odd number; e.g., 3.5 becomes 3, 4.5 becomes 5, and -3.5 becomes -3. =item B LIST Rounds the number(s) to the nearest integer. In scalar context, returns a single value; in list context, returns a list of values. Numbers that are halfway between two integers are rounded up or down in a random fashion. For example, in a large number of trials, 2.5 will become 2 half the time and 3 half the time. =item B TARGET, LIST Rounds the number(s) to the nearest multiple of the target value. TARGET must be positive. In scalar context, returns a single value; in list context, returns a list of values. Numbers that are halfway between two multiples of the target will be rounded to infinity. For example: nearest(10, 44) yields 40 nearest(10, 46) 50 nearest(10, 45) 50 nearest(25, 328) 325 nearest(.1, 4.567) 4.6 nearest(10, -45) -50 =item B TARGET, LIST Rounds the number(s) to the nearest multiple of the target value. TARGET must be positive. In scalar context, returns a single value; in list context, returns a list of values. Numbers that are halfway between two multiples of the target will be rounded to the ceiling, i.e. the next algebraically higher multiple. For example: nearest_ceil(10, 44) yields 40 nearest_ceil(10, 45) 50 nearest_ceil(10, -45) -40 =item B TARGET, LIST Rounds the number(s) to the nearest multiple of the target value. TARGET must be positive. In scalar context, returns a single value; in list context, returns a list of values. Numbers that are halfway between two multiples of the target will be rounded to the floor, i.e. the next algebraically lower multiple. For example: nearest_floor(10, 44) yields 40 nearest_floor(10, 45) 40 nearest_floor(10, -45) -50 =item B TARGET, LIST Rounds the number(s) to the nearest multiple of the target value. TARGET must be positive. In scalar context, returns a single value; in list context, returns a list of values. Numbers that are halfway between two multiples of the target will be rounded up or down in a random fashion. For example, in a large number of trials, C will yield 40 half the time and 50 half the time. =item B TARGET, LIST Returns the next lower multiple of the number(s) in LIST. TARGET must be positive. In scalar context, returns a single value; in list context, returns a list of values. Numbers that are between two multiples of the target will be adjusted to the nearest multiples of LIST that are algebraically lower. For example: nlowmult(10, 44) yields 40 nlowmult(10, 46) 40 nlowmult(25, 328) 325 nlowmult(.1, 4.567) 4.5 nlowmult(10, -41) -50 =item B TARGET, LIST Returns the next higher multiple of the number(s) in LIST. TARGET must be positive. In scalar context, returns a single value; in list context, returns a list of values. Numbers that are between two multiples of the target will be adjusted to the nearest multiples of LIST that are algebraically higher. For example: nhimult(10, 44) yields 50 nhimult(10, 46) 50 nhimult(25, 328) 350 nhimult(.1, 4.512) 4.6 nhimult(10, -49) -40 =back =head1 VARIABLE The variable B<$Math::Round::half> is used by most routines in this module. Its value is very slightly larger than 0.5, for reasons explained below. If you find that your application does not deliver the expected results, you may reset this variable at will. =head1 STANDARD FLOATING-POINT DISCLAIMER Floating-point numbers are, of course, a rational subset of the real numbers, so calculations with them are not always exact. Numbers that are supposed to be halfway between two others may surprise you; for instance, 0.85 may not be exactly halfway between 0.8 and 0.9, and (0.75 - 0.7) may not be the same as (0.85 - 0.8). In order to give more predictable results, these routines use a value for one-half that is slightly larger than 0.5. Nevertheless, if the numbers to be rounded are stored as floating-point, they will be subject as usual to the mercies of your hardware, your C compiler, etc. =head1 AUTHOR Math::Round was written by Geoffrey Rommel EGROMMEL@cpan.orgE in October 2000. =head1 COPYRIGHT AND LICENSE This software is copyright (c) 2000 by Geoffrey Rommel Egrommel@cpan.orgE. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. =cut Math-Round-0.08/t/02-original.t000644 000765 000024 00000003144 14511227652 016335 0ustar00neilbstaff000000 000000 #!perl use strict; use warnings; use Test::More; use Math::Round qw(:all); ok( round(2.4) == 2 && round(2.5) == 3 && round(2.6) == 3 && eq2(round(-3.9, -2.5), -4, -3), "round"); ok( round_even(2.4) == 2 && round_even(2.5) == 2 && eq2(round_even(-2.6, 3.5), -3, 4), "round_even"); ok( round_odd(16.4) == 16 && round_odd(16.5) == 17 && round_odd(16.6) == 17 && eq2(round_odd(-16.7, 17.5), -17, 17), "round_odd"); ok( round_rand(16.4) == 16 && round_rand(16.6) == 17 && eq2(round_rand(-17.8, -29.2), -18, -29), "round_rand"); ok( nearest(20, 9) == 0 && nearest(20, 10) == 20 && nearest(20, 11) == 20 && sprintf("%.2f", nearest(0.01, 16.575)) eq "16.58" && eq2(nearest(20, -98, -110), -100, -120), "nearest"); ok( nearest_ceil(20, 9) == 0 && nearest_ceil(20, 10) == 20 && nearest_ceil(20, 11) == 20 && eq2(nearest_ceil(20, -98, -110), -100, -100), "nearest_ceil"); ok( nearest_floor(20, 9) == 0 && nearest_floor(20, 10) == 0 && nearest_floor(20, 11) == 20 && eq2(nearest_floor(20, -98, -110), -100, -120), "nearest_floor"); ok( nearest_rand(30, 44) == 30 && nearest_rand(30, 46) == 60 && eq2(nearest_rand(30, -76, -112), -90, -120), "nearest_rand"); ok( nlowmult(10, 44) == 40 && nlowmult(10, 46) == 40 && eq2(nlowmult(30, -76, -91), -90, -120), "nlowmult"); ok( nhimult(10, 41) == 50 && nhimult(10, 49) == 50 && eq2(nhimult(30, -74, -119), -60, -90), "nhimult"); done_testing(); #--- Compare two lists with 2 elements each for equality. sub eq2 { my ($a0, $a1, $b0, $b1) = @_; return ($a0 == $b0 && $a1 == $b1) ? 1 : 0; }