CLDRPluralRuleEvaluatorRange.php

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<?php
class CLDRPluralRuleEvaluatorRange {
    public $parts = array();

    function __construct( $start, $end = false ) {
        if ( $end === false ) {
            $this->parts[] = $start;
        } else {
            $this->parts[] = array( $start, $end );
        }
    }

    function isNumberIn( $number, $integerConstraint = true ) {
        foreach ( $this->parts as $part ) {
            if ( is_array( $part ) ) {
                if ( ( !$integerConstraint || floor( $number ) === (float)$number )
                    && $number >= $part[0] && $number <= $part[1]
                ) {
                    return true;
                }
            } else {
                if ( $number == $part ) {
                    return true;
                }
            }
        }

        return false;
    }

    function isNumberWithin( $number ) {
        return $this->isNumberIn( $number, false );
    }

    function add( $other ) {
        if ( $other instanceof self ) {
            $this->parts = array_merge( $this->parts, $other->parts );
        } else {
            $this->parts[] = $other;
        }
    }

    function __toString() {
        $s = 'Range(';
        foreach ( $this->parts as $i => $part ) {
            if ( $i ) {
                $s .= ', ';
            }
            if ( is_array( $part ) ) {
                $s .= $part[0] . '..' . $part[1];
            } else {
                $s .= $part;
            }
        }
        $s .= ')';

        return $s;
    }
}