CVS: blootbot/src/Modules dice.pl,NONE,1.1
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timriker
From: Tim R. <tim...@us...> - 2005-05-12 21:28:27
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Update of /cvsroot/blootbot/blootbot/src/Modules In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv9663/src/Modules Added Files: dice.pl Log Message: dice --- NEW FILE: dice.pl --- #!/usr/bin/perl # dice rolling # hacked up by Tim Riker <Tim@Rikers.org> from Games::Dice package dice; use strict; use warnings; sub dice::roll_array ($) { my($line) = shift; my(@throws) = (); return @throws unless $line =~ m{ ^ # beginning of line (\d+)? # optional count in $1 [dD] # 'd' for dice ( # type of dice in $2: \d+ # either one or more digits | # or % # a percent sign for d% = d100 ) }x; # whitespace allowed my($num) = $1 || 1; my($type) = $2; return @throws if $num > 100; $type = 100 if $type eq '%'; return @throws if $type < 2; for( 1 .. $num ) { push @throws, int (rand $type) + 1; } return @throws; } sub dice::roll ($) { my($line) = shift; $line =~ s/ //g; return '' 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 $3 )? # both of those last are optional }x; # whitespace allowed in re my($dice_string) = $1; my($sign) = $2 || ''; my($offset) = $3 || 0; $sign = lc $sign; my(@throws) = roll_array( $dice_string ); return '' unless @throws > 0; my($retval) = "rolled " . join(',', @throws); my(@result); if( $sign eq 'b' ) { $offset = 0 if $offset < 0; $offset = @throws if $offset > @throws; @throws = sort { $b <=> $a } @throws; # sort numerically, descending @result = @throws[ 0 .. $offset-1 ]; # pick off the $offset first ones $retval .= " best $offset"; } else { @result = @throws; } my($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 '/'; $retval .= " $sign $offset" if $sign; return "$retval = $sum"; } sub dice::dice { my ($message) = @_; srand(); # fork seems to not change rand. force it here my $retval = roll($message); &::performStrictReply($retval); } #print "(q)uit or die combination, ex. 4d10/4\n"; #while (my $dice = <STDIN>) { # chomp $dice; # if (! $dice || $dice =~ m/^q(?:uit)*$/i) { # print "done\n"; # exit; # } else { # print roll($dice) . "\n"; # } #} 1; __END__ =pod =head1 NAME dice.pl - simulate die rolls =head1 SYNOPSIS 'dice 3d6+1'; =head1 DESCRIPTION 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. =head1 AUTHOR Philip Newton, <pn...@cp...> Tim Riker <Tim@Rikers.org> =head1 LICENCE Copyright (C) 1999, 2002 Philip Newton - All rights reserved. Copyright (C) 2005 Tim Riker - 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. =cut |