FormValidator::Simple::Plugin::Math - Math evaluation for FormValidator::Simple

FormValidator-Simple-Plugin-Math documentation Contained in the FormValidator-Simple-Plugin-Math distribution.

Index

Code Index:

NAME

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FormValidator::Simple::Plugin::Math - Math evaluation for FormValidator::Simple

VERSION

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Version 0.03

SYNOPSIS

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You can evalute the form data with math expression.

    use FormValidator::Simple qw/Math/;

    my $result = FormValidator::Simple->check( $req => [
        category => [ 'NOT_BLANK', ['MATH', 'x % 100', '!0']],
        ### valid if category % 100 != 0
    ]);

EVALUATION

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    ['MATH', some_math_expression, is_what]

some_math_expression

x is the value to be passed. e.g. x**3

is_what

Sets some number.

Switches the true-false evaluation if is_what starts with !.

AUTHOR

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Yusuke Sugiyama, <ally at blinkingstar.net>

BUGS

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Please report any bugs or feature requests to bug-formvalidator-simple-plugin-math at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=FormValidator-Simple-Plugin-Math. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

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You can find documentation for this module with the perldoc command.

    perldoc FormValidator::Simple::Plugin::Math

You can also look for information at:

* AnnoCPAN: Annotated CPAN documentation

http://annocpan.org/dist/FormValidator-Simple-Plugin-Math

* CPAN Ratings

http://cpanratings.perl.org/d/FormValidator-Simple-Plugin-Math

* RT: CPAN's request tracker

http://rt.cpan.org/NoAuth/Bugs.html?Dist=FormValidator-Simple-Plugin-Math

* Search CPAN

http://search.cpan.org/dist/FormValidator-Simple-Plugin-Math

ACKNOWLEDGEMENTS

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COPYRIGHT & LICENSE

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Copyright 2007 Yusuke Sugiyama, all rights reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

FormValidator-Simple-Plugin-Math documentation Contained in the FormValidator-Simple-Plugin-Math distribution. 
package FormValidator::Simple::Plugin::Math;

use warnings;
use strict;
use FormValidator::Simple::Constants;
use Math::Expression;


our $VERSION = '0.03';


sub MATH{
	my ($self, $params, $args) = @_;
	my $calc = $args->[0] || 0;
	my $equals = $args->[1] || 0;
	my $data = $params->[0];
	my $is     = TRUE;
	my $is_not = FALSE;
	if ($equals =~ /^\!(\d+?)$/){
		$equals = $1;
		$is     = FALSE;
		$is_not = TRUE;
	}
	elsif ($equals eq '!'){
		$equals = 0;
		$is     = FALSE;
		$is_not = TRUE;
	}
	if ($equals =~ /[^\d]/ || $data =~ /[^\d]/){
		return TRUE;
	}
	my $m = new Math::Expression;
	$m->VarSetScalar('x',$data);
	my $mtree = $m->Parse($calc);
	my $value = $m->EvalToScalar($mtree);
	return ($value == $equals) ? $is : $is_not;
}


1; # End of FormValidator::Simple::Plugin::Math