Subversion Repositories cheapmusic

<?php namespace Fuse\Bitap;

function score($pattern, $options = [])

{

    $options = array_merge([

        'errors' => 0,

        'currentLocation' => 0,

        'expectedLocation' => 0,

        'distance' => 100

    ], $options);

    $accuracy = $options['errors'] / mb_strlen($pattern);

    $proximity = abs($options['expectedLocation'] - $options['currentLocation']);

    if (!$options['distance']) {

        // Dodge divide by zero error.

        return $proximity ? 1.0 : $accuracy;

    }

    return $accuracy + ($proximity / $options['distance']);

}