Location: PHPKode > projects > OpenDataCenter Network Management System > function/test_overlap.php
<?php
// ----------------------------------------------------------------------
// Copyright (C) 2007 by GREGORY LE BRAS
// ----------------------------------------------------------------------
// LICENSE
//
// This file is part of ODCNMS - Open DataCenter Network Management System
// 
// ODCNMS is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
// 
// Foobar is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with Foobar; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
// ----------------------------------------------------------------------
// Original Author of file: GREGORY LE BRAS - http://www.odcnms.org/
// ----------------------------------------------------------------------

// Function to test overlapping between to range

function test_overlap($ds, $rangeaddr, $rangesize, $cust) {

    // full test, no form of overlap allowed
    if ($RANGETEST==0) {
        $result=&$ds->ds->Execute("SELECT rangeaddr
                FROM range
                WHERE (($rangeaddr BETWEEN rangeaddr AND 
                        rangeaddr + rangesize - 1) OR
                    ($rangeaddr < rangeaddr AND 
                     $rangeaddr+$rangesize > 
                     rangeaddr + rangesize - 1)) AND
                customer=$cust");
    }
    // only exact duplicates are rejected - no UNIQUE index for all three conditions
    else if ($RANGETEST==1) {
        $result=&$ds->ds->Execute("SELECT rangeaddr
                FROM range
                WHERE rangeaddr = $rangeaddr AND rangesize = $rangesize AND customer=$cust");
    }
    // do no checks at all - allows overlaps across areas and within areas
    else {
        return 0;
    }
    
    if ($result->FetchRow()) {
        return 1;
    }

}

?>
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