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<?php
/**
* SAXY Lite is a non-validating, but lightweight and fast SAX parser for PHP, modelled on the Expat parser
* @package saxy-xmlparser
* @subpackage saxy-xmlparser-lite
* @version 1.0
* @copyright (C) 2004 John Heinstein. All rights reserved
* @license http://www.gnu.org/copyleft/lesser.html LGPL License
* @author John Heinstein <johnkarl@nbnet.nb.ca>
* @link http://www.engageinteractive.com/saxy/ SAXY Home Page
* SAXY is Free Software
**/
if (!defined('SAXY_INCLUDE_PATH')) {
define('SAXY_INCLUDE_PATH', (dirname(__FILE__) . "/"));
}
/** current version of SAXY Lite */
define ('SAXY_LITE_VERSION', '1.0');
/** initial saxy lite parse state, before anything is encountered */
define('SAXY_STATE_NONE', 0);
/** saxy lite parse state, processing main document */
define('SAXY_STATE_PARSING', 1);
require_once(SAXY_INCLUDE_PATH . 'xml_saxy_shared.php');
/**
* The SAX Parser class
*
* @package saxy-xmlparser
* @subpackage saxy-xmlparser-lite
* @author John Heinstein <johnkarl@nbnet.nb.ca>
*/
class SAXY_Lite_Parser extends SAXY_Parser_Base {
/**
* Constructor for SAX parser
*/
function SAXY_Lite_Parser() {
$this->SAXY_Parser_Base();
$this->state = SAXY_STATE_NONE;
} //SAXY_Lite_Parser
/**
* Returns the current version of SAXY Lite
* @return Object The current version of SAXY Lite
*/
function getVersion() {
return SAXY_LITE_VERSION;
} //getVersion
/**
* Processes the xml prolog, doctype, and any other nodes that exist outside of the main xml document
* @param string The xml text to be processed
* @return string The preprocessed xml text
*/
function preprocessXML($xmlText) {
//strip prolog
$xmlText = trim($xmlText);
$total = strlen($xmlText);
for ($i = 0; $i < $total; $i++) {
// if ($xmlText{$i} == '<') {
if (substr($xmlText, $i, 1) == '<') {
switch ($xmlText{($i + 1)}) {
case '?':
case '!':
break;
default:
$this->state = SAXY_STATE_PARSING;
return (substr($xmlText, $i));
}
}
}
} //preprocessXML
/**
* The controlling method for the parsing process
* @param string The xml text to be processed
* @return boolean True if parsing is successful
*/
function parse ($xmlText) {
$xmlText = $this->preprocessXML($xmlText);
$total = strlen($xmlText);
for ($i = 0; $i < $total; $i++) {
// $currentChar = $xmlText{$i};
$currentChar = substr($xmlText, $i, 1);
switch ($this->state) {
case SAXY_STATE_PARSING:
switch ($currentChar) {
case '<':
if (substr($this->charContainer, 0, SAXY_CDATA_LEN) == SAXY_SEARCH_CDATA) {
$this->charContainer .= $currentChar;
}
else {
$this->parseBetweenTags($this->charContainer);
$this->charContainer = '';
}
break;
case '>':
if ((substr($this->charContainer, 0, SAXY_CDATA_LEN) == SAXY_SEARCH_CDATA) &&
!(($this->getCharFromEnd($this->charContainer, 0) == ']') &&
($this->getCharFromEnd($this->charContainer, 1) == ']'))) {
$this->charContainer .= $currentChar;
}
else {
$this->parseTag($this->charContainer);
$this->charContainer = '';
}
break;
default:
$this->charContainer .= $currentChar;
}
break;
}
}
return true;
} //parse
/**
* Parses an element tag
* @param string The interior text of the element tag
*/
function parseTag($tagText) {
$tagText = trim($tagText);
$firstChar = $tagText{0};
$myAttributes = array();
switch ($firstChar) {
case '/':
$tagName = substr($tagText, 1);
$this->fireEndElementEvent($tagName);
break;
case '!':
$upperCaseTagText = strtoupper($tagText);
if (strpos($upperCaseTagText, SAXY_SEARCH_CDATA) !== false) { //CDATA Section
$total = strlen($tagText);
$openBraceCount = 0;
$textNodeText = '';
for ($i = 0; $i < $total; $i++) {
// $currentChar = $tagText{$i};
$currentChar = substr($tagText, $i, 1);
if (($currentChar == ']') && ($tagText{($i + 1)} == ']')) {
break;
}
else if ($openBraceCount > 1) {
$textNodeText .= $currentChar;
}
else if ($currentChar == '[') { //this won't be reached after the first open brace is found
$openBraceCount ++;
}
}
if ($this->cDataSectionHandler == null) {
$this->fireCharacterDataEvent($textNodeText);
}
else {
$this->fireCDataSectionEvent($textNodeText);
}
}
else if (strpos($upperCaseTagText, SAXY_SEARCH_NOTATION) !== false) { //NOTATION node, discard
return;
}
else if (substr($tagText, 0, 2) == '!-') { //comment node, discard
return;
}
break;
case '?':
//Processing Instruction node, discard
return;
default:
if ((strpos($tagText, '"') !== false) || (strpos($tagText, "'") !== false)) {
$total = strlen($tagText);
$tagName = '';
for ($i = 0; $i < $total; $i++) {
// $currentChar = $tagText{$i};
$currentChar = substr($tagText, $i, 1);
if (($currentChar == ' ') || ($currentChar == "\t") ||
($currentChar == "\n") || ($currentChar == "\r") ||
($currentChar == "\x0B")) {
$myAttributes = $this->parseAttributes(substr($tagText, $i));
break;
}
else {
$tagName .= $currentChar;
}
}
if (strrpos($tagText, '/') == (strlen($tagText) - 1)) { //check $tagText, but send $tagName
$this->fireStartElementEvent($tagName, $myAttributes);
$this->fireEndElementEvent($tagName);
}
else {
$this->fireStartElementEvent($tagName, $myAttributes);
}
}
else {
if (strpos($tagText, '/') !== false) {
$tagText = trim(substr($tagText, 0, (strrchr($tagText, '/') - 1)));
$this->fireStartElementEvent($tagText, $myAttributes);
$this->fireEndElementEvent($tagText);
}
else {
$this->fireStartElementEvent($tagText, $myAttributes);
}
}
}
} //parseTag
/**
* Returns the current error code (non-functional for SAXY Lite)
* @return int The current error code
*/
function xml_get_error_code() {
return -1;
} //xml_get_error_code
/**
* Returns a textual description of the error code (non-functional for SAXY Lite)
* @param int The error code
* @return string The error message
*/
function xml_error_string($code) {
return "";
} //xml_error_string
} //SAXY_Lite_Parser
?>