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initial import of Games-Dice 0.02 from CPAN
git-cpan-module: Games-Dice git-cpan-version: 0.02 git-cpan-authorid: PNE git-cpan-file: authors/id/P/PN/PNE/Games-Dice-0.02.tar.gz
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Revision history for Perl extension Games::Dice. | ||
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0.02 2002-02-20 | ||
* Added licence | ||
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0.01 Mon Apr 19 10:15:58 1999 | ||
- original version; created by h2xs 1.18 | ||
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package Games::Dice; | ||
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use strict; | ||
use vars qw($VERSION @ISA @EXPORT @EXPORT_OK); | ||
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require Exporter; | ||
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@ISA = qw(Exporter); | ||
# Items to export into callers namespace by default. Note: do not export | ||
# names by default without a very good reason. Use EXPORT_OK instead. | ||
# Do not simply export all your public functions/methods/constants. | ||
@EXPORT_OK = qw( | ||
roll roll_array | ||
); | ||
$VERSION = '0.02'; | ||
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# Preloaded methods go here. | ||
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sub roll ($) { | ||
my($line, $dice_string, $sign, $offset, $sum, @throws, @result); | ||
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$line = shift; | ||
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return undef unless $line =~ m{ | ||
^ # beginning of line | ||
( # dice string in $1 | ||
(?:\d+)? # optional count | ||
[dD] # 'd' for dice | ||
(?: # type of dice: | ||
\d+ # either one or more digits | ||
| # or | ||
% # a percent sign for d% = d100 | ||
) | ||
) | ||
(?: # grouping-only parens | ||
([-+xX*/bB]) # a + - * / b(est) in $2 | ||
(\d+) # an offset in $3 | ||
)? # both of those last are optional | ||
}x; # whitespace allowed | ||
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$dice_string = $1; | ||
$sign = $2 || ''; | ||
$offset = $3 || 0; | ||
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$sign = lc $sign; | ||
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@throws = roll_array( $dice_string ); | ||
return undef unless @throws; | ||
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if( $sign eq 'b' ) { | ||
$offset = 0 if $offset < 0; | ||
$offset = @throws if $offset > @throws; | ||
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@throws = sort { $b <=> $a } @throws; # sort numerically, descending | ||
@result = @throws[ 0 .. $offset-1 ]; # pick off the $offset first ones | ||
} else { | ||
@result = @throws; | ||
} | ||
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$sum = 0; | ||
$sum += $_ foreach @result; | ||
$sum += $offset if $sign eq '+'; | ||
$sum -= $offset if $sign eq '-'; | ||
$sum *= $offset if ($sign eq '*' || $sign eq 'x'); | ||
do { $sum /= $offset; $sum = int $sum; } if $sign eq '/'; | ||
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return $sum; | ||
} | ||
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sub roll_array ($) { | ||
my($line, $num, $type, @throws); | ||
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$line = shift; | ||
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return undef unless $line =~ m{ | ||
^ # beginning of line | ||
(\d+)? # optional count in $1 | ||
[dD] # 'd' for dice | ||
( # type of dice in $2: | ||
\d+ # either one or more digits | ||
| # or | ||
% # a percent sign for d% = d100 | ||
) | ||
}x; # whitespace allowed | ||
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$num = $1 || 1; | ||
$type = $2; | ||
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$type = 100 if $type eq '%'; | ||
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@throws = (); | ||
for( 1 .. $num ) { | ||
push @throws, int (rand $type) + 1; | ||
} | ||
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return @throws; | ||
} | ||
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1; | ||
__END__ | ||
=head1 NAME | ||
Games::Dice - Perl module to simulate die rolls | ||
=head1 SYNOPSIS | ||
use Games::Dice 'roll'; | ||
$strength = roll '3d6+1'; | ||
use Games::Dice 'roll_array'; | ||
@rolls = roll_array '4d8'; | ||
=head1 DESCRIPTION | ||
Games::Dice simulates die rolls. It uses a function-oriented (not | ||
object-oriented) interface. No functions are exported by default. At | ||
present, there are two functions which are exportable: C<roll> and | ||
C<roll_array>. The latter is used internally by C<roll>, but can also be | ||
exported by itself. | ||
The number and type of dice to roll is given in a style which should be | ||
familiar to players of popular role-playing games: I<a>dI<b>[+-*/b]I<c>. | ||
I<a> is optional and defaults to 1; it gives the number of dice to roll. | ||
I<b> indicates the number of sides to each die; the most common, | ||
cube-shaped die is thus a d6. % can be used instead of 100 for I<b>; | ||
hence, rolling 2d% and 2d100 is equivalent. C<roll> simulates I<a> rolls | ||
of I<b>-sided dice and adds together the results. The optional end, | ||
consisting of one of +-*/b and a number I<c>, can modify the sum of the | ||
individual dice. +-*/ are similar in that they take the sum of the rolls | ||
and add or subtract I<c>, or multiply or divide the sum by I<c>. (x can | ||
also be used instead of *.) Hence, 1d6+2 gives a number in the range | ||
3..8, and 2d4*10 gives a number in the range 20..80. (Using / truncates | ||
the result to an int after dividing.) Using b in this slot is a little | ||
different: it's short for "best" and indicates "roll a number of dice, | ||
but add together only the best few". For example, 5d6b3 rolls five six- | ||
sided dice and adds together the three best rolls. This is sometimes | ||
used, for example, in roll-playing to give higher averages. | ||
Generally, C<roll> probably provides the nicer interface, since it does | ||
the adding up itself. However, in some situations one may wish to | ||
process the individual rolls (for example, I am told that in the game | ||
Feng Shui, the number of dice to be rolled cannot be determined in | ||
advance but depends on whether any 6's were rolled); in such a case, one | ||
can use C<roll_array> to return an array of values, which can then be | ||
examined or processed in an application-dependent manner. | ||
This having been said, comments and additions (especially if accompanied | ||
by code!) to Games::Dice are welcome. So, using the above example, if | ||
anyone wishes to contribute a function along the lines of roll_feng_shui | ||
to become part of Games::Dice (or to support any other style of die | ||
rolling), you can contribute it to the author's address, listed below. | ||
=head1 AUTHOR | ||
Philip Newton, <pne@cpan.org> | ||
=head1 LICENCE | ||
Copyright (C) 1999, 2002 Philip Newton | ||
All rights reserved. | ||
Redistribution and use in source and binary forms, with or without | ||
modification, are permitted provided that the following conditions | ||
are met: | ||
=over 4 | ||
=item * | ||
Redistributions of source code must retain the above copyright notice, | ||
this list of conditions and the following disclaimer. | ||
=item * | ||
Redistributions in binary form must reproduce the above copyright notice, | ||
this list of conditions and the following disclaimer in the | ||
documentation and/or other materials provided with the distribution. | ||
=back | ||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND | ||
CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, | ||
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | ||
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | ||
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE | ||
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | ||
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | ||
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | ||
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | ||
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | ||
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
POSSIBILITY OF SUCH DAMAGE. | ||
=head1 SEE ALSO | ||
perl(1). | ||
=cut |
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Changes | ||
Dice.pm | ||
MANIFEST | ||
Makefile.PL | ||
t/1.t |
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use ExtUtils::MakeMaker; | ||
# See lib/ExtUtils/MakeMaker.pm for details of how to influence | ||
# the contents of the Makefile that is written. | ||
WriteMakefile( | ||
'NAME' => 'Games::Dice', | ||
'VERSION_FROM' => 'Dice.pm', # finds $VERSION | ||
); |
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# Before `make install' is performed this script should be runnable with | ||
# `make test'. After `make install' it should work as `perl test.pl' | ||
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######################### We start with some black magic to print on failure. | ||
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# Change 1..1 below to 1..last_test_to_print . | ||
# (It may become useful if the test is moved to ./t subdirectory.) | ||
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BEGIN { $| = 1; print "1..1\n"; } | ||
END {print "not ok 1\n" unless $loaded;} | ||
use Games::Dice; | ||
$loaded = 1; | ||
print "ok 1\n"; | ||
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######################### End of black magic. | ||
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# Insert your test code below (better if it prints "ok 13" | ||
# (correspondingly "not ok 13") depending on the success of chunk 13 | ||
# of the test code): | ||
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