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72 lines
1.8 KiB
Perl
Executable File
72 lines
1.8 KiB
Perl
Executable File
#!/usr/bin/perl -w
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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# Quick and dirty by :pragma
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use Math::Units qw(convert);
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my ($arguments, $response, $invalid, @conversion);
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my @valid_keywords = (
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'sin', 'cos', 'tan', 'atan', 'exp', 'int', 'hex', 'oct', 'log', 'sqrt',
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'floor', 'ceil', 'asin', 'acos', 'log10', 'sinh', 'cosh', 'tanh', 'abs',
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'pi', 'deg2rad', 'rad2deg', 'atan2', 'cbrt'
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);
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if ($#ARGV < 0)
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{
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print "Dumbass.\n";
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exit 0;
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}
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$arguments = join(' ', @ARGV);
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my $orig_arguments = $arguments;
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$arguments =~ s/(the )*answer.*question of life(,? the universe,? and everything)?\s?/42/gi;
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$arguments =~ s/(the )*meaning of (life|existence|everything)?/42/gi;
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if ($arguments =~ s/([^ ]+)\s+to\s+([^ ]+)\s*$//) {
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@conversion = ($1, $2);
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}
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if($arguments =~ m/([\$`\|{}"'#@=?\[\]])/ or $arguments =~ m/(~~)/) {
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$invalid = $1;
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} else {
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while($arguments =~ /([a-zA-Z0-9]+)/g) {
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my $keyword = $1;
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next if $keyword =~ m/^[0-9]+$/;
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$invalid = $keyword and last if not grep { /^$keyword$/ } @valid_keywords;
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}
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}
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if($invalid) {
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print "Illegal symbol '$invalid' in equation\n";
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exit 1;
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}
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$response = eval("use POSIX qw/ceil floor/; use Math::Trig; use Math::Complex;" . $arguments);
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if($@) {
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my $error = $@;
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$error =~ s/[\n\r]+//g;
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$error =~ s/ at \(eval \d+\) line \d+.//;
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$error =~ s/ at EOF$//;
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$error =~ s/Died at .*//;
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print $error;
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exit 1;
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}
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if (@conversion) {
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my $result = eval { convert($response, $conversion[0], $conversion[1]); };
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if ($@) {
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print "Unknown conversion from $conversion[0] to $conversion[1]. Units are case-sensitive (Hz, not hz).\n";
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exit 1;
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}
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$response = "$result $conversion[1]";
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}
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print "$orig_arguments = $response\n";
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