mlocati / chm-lib

     *

     * @return \CHMLib\TOCIndex\Tree|null

     */

    public function getTOC()

    {

        if ($this->toc === null) {

            $r = false;

            foreach ($this->entries as $entry) {

                if ($entry->isFile() && strcasecmp(substr($entry->getPath(), -4), '.hhc') === 0) {

                    $r = TOCIndex\Tree::fromString($this, $entry->getContents());

                    break;

                }

            }

            $this->toc = $r;

        }

        return ($this->toc === false) ? null : $this->toc;

    }

    /**

     * Get the index of this CHM file (if available).

     *

     * @return \CHMLib\TOCIndex\Tree|null

     */

    public function getIndex()

    {

        if ($this->index === null) {

            $r = false;

            foreach ($this->entries as $entry) {

                if ($entry->isFile() && strcasecmp(substr($entry->getPath(), -4), '.hhk') === 0) {

                    $r = TOCIndex\Tree::fromString($this, $entry->getContents());

                    break;

                }

            }

            $this->index = $r;

        }

        return ($this->index === false) ? null : $this->index;

    }

}