XML.php

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<?php

class Auth_Yadis_XMLParser {
    function init($xml_string, $namespace_map)
    {
        if (!$this->setXML($xml_string)) {
            return false;
        }

        foreach ($namespace_map as $prefix => $uri) {
            if (!$this->registerNamespace($prefix, $uri)) {
                return false;
            }
        }

        return true;
    }

    function registerNamespace($prefix, $uri)
    {
        // Not implemented.
    }

    function setXML($xml_string)
    {
        // Not implemented.
    }

    function evalXPath($xpath, $node = null)
    {
        // Not implemented.
    }

    function content($node)
    {
        // Not implemented.
    }

    function attributes($node)
    {
        // Not implemented.
    }
}

class Auth_Yadis_domxml extends Auth_Yadis_XMLParser {
    function Auth_Yadis_domxml()
    {
        $this->xml = null;
        $this->doc = null;
        $this->xpath = null;
        $this->errors = array();
    }

    function setXML($xml_string)
    {
        $this->xml = $xml_string;
        $this->doc = @domxml_open_mem($xml_string, DOMXML_LOAD_PARSING,
                                      $this->errors);

        if (!$this->doc) {
            return false;
        }

        $this->xpath = $this->doc->xpath_new_context();

        return true;
    }

    function registerNamespace($prefix, $uri)
    {
        return xpath_register_ns($this->xpath, $prefix, $uri);
    }

    function &evalXPath($xpath, $node = null)
    {
        if ($node) {
            $result = @$this->xpath->xpath_eval($xpath, $node);
        } else {
            $result = @$this->xpath->xpath_eval($xpath);
        }

        if (!$result) {
            $n = array();
            return $n;
        }

        if (!$result->nodeset) {
            $n = array();
            return $n;
        }

        return $result->nodeset;
    }

    function content($node)
    {
        if ($node) {
            return $node->get_content();
        }
    }

    function attributes($node)
    {
        if ($node) {
            $arr = $node->attributes();
            $result = array();

            if ($arr) {
                foreach ($arr as $attrnode) {
                    $result[$attrnode->name] = $attrnode->value;
                }
            }

            return $result;
        }
    }
}

class Auth_Yadis_dom extends Auth_Yadis_XMLParser {
    function Auth_Yadis_dom()
    {
        $this->xml = null;
        $this->doc = null;
        $this->xpath = null;
        $this->errors = array();
    }

    function setXML($xml_string)
    {
        $this->xml = $xml_string;
        $this->doc = new DOMDocument;

        if (!$this->doc) {
            return false;
        }

        if (!@$this->doc->loadXML($xml_string)) {
            return false;
        }

        $this->xpath = new DOMXPath($this->doc);

        if ($this->xpath) {
            return true;
        } else {
            return false;
        }
    }

    function registerNamespace($prefix, $uri)
    {
        return $this->xpath->registerNamespace($prefix, $uri);
    }

    function &evalXPath($xpath, $node = null)
    {
        if ($node) {
            $result = @$this->xpath->query($xpath, $node);
        } else {
            $result = @$this->xpath->query($xpath);
        }

        $n = array();

        if (!$result) {
            return $n;
        }

        for ($i = 0; $i < $result->length; $i++) {
            $n[] = $result->item($i);
        }

        return $n;
    }

    function content($node)
    {
        if ($node) {
            return $node->textContent;
        }
    }

    function attributes($node)
    {
        if ($node) {
            $arr = $node->attributes;
            $result = array();

            if ($arr) {
                for ($i = 0; $i < $arr->length; $i++) {
                    $node = $arr->item($i);
                    $result[$node->nodeName] = $node->nodeValue;
                }
            }

            return $result;
        }
    }
}

global $__Auth_Yadis_defaultParser;
$__Auth_Yadis_defaultParser = null;

function Auth_Yadis_setDefaultParser(&$parser)
{
    global $__Auth_Yadis_defaultParser;
    $__Auth_Yadis_defaultParser =& $parser;
}

function Auth_Yadis_getSupportedExtensions()
{
    return array(
                 'dom' => array('classname' => 'Auth_Yadis_dom',
                       'libname' => array('dom.so', 'dom.dll')),
                 'domxml' => array('classname' => 'Auth_Yadis_domxml',
                       'libname' => array('domxml.so', 'php_domxml.dll')),
                 );
}

function &Auth_Yadis_getXMLParser()
{
    global $__Auth_Yadis_defaultParser;

    if (isset($__Auth_Yadis_defaultParser)) {
        return $__Auth_Yadis_defaultParser;
    }

    $p = null;
    $classname = null;

    $extensions = Auth_Yadis_getSupportedExtensions();

    // Return a wrapper for the resident implementation, if any.
    foreach ($extensions as $name => $params) {
        if (!extension_loaded($name)) {
            foreach ($params['libname'] as $libname) {
                if (@dl($libname)) {
                    $classname = $params['classname'];
                }
            }
        } else {
            $classname = $params['classname'];
        }
        if (isset($classname)) {
            $p = new $classname();
            return $p;
        }
    }

    if (!isset($p)) {
        trigger_error('No XML parser was found', E_USER_ERROR);
    } else {
        Auth_Yadis_setDefaultParser($p);
    }

    return $p;
}

?>

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