mirror of
https://we.phorge.it/source/arcanist.git
synced 2025-02-06 20:08:28 +01:00
488 lines
19 KiB
PHP
488 lines
19 KiB
PHP
|
<?php
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This file is part of the JSON Lint package.
|
||
|
|
*
|
||
|
|
* (c) Jordi Boggiano <j.boggiano@seld.be>
|
||
|
|
*
|
||
|
|
* For the full copyright and license information, please view the LICENSE
|
||
|
|
* file that was distributed with this source code.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Parser class
|
||
|
|
*
|
||
|
|
* Example:
|
||
|
|
*
|
||
|
|
* $parser = new JsonParser();
|
||
|
|
* // returns null if it's valid json, or an error object
|
||
|
|
* $parser->lint($json);
|
||
|
|
* // returns parsed json, like json_decode does, but slower, throws exceptions on failure.
|
||
|
|
* $parser->parse($json);
|
||
|
|
*
|
||
|
|
* Ported from https://github.com/zaach/jsonlint
|
||
|
|
*/
|
||
|
|
class JsonLintJsonParser
|
||
|
|
{
|
||
|
|
const DETECT_KEY_CONFLICTS = 1;
|
||
|
|
const ALLOW_DUPLICATE_KEYS = 2;
|
||
|
|
const PARSE_TO_ASSOC = 4;
|
||
|
|
|
||
|
|
private $lexer;
|
||
|
|
|
||
|
|
private $flags;
|
||
|
|
private $stack;
|
||
|
|
private $vstack; // semantic value stack
|
||
|
|
private $lstack; // location stack
|
||
|
|
|
||
|
|
private $symbols = array(
|
||
|
|
'error' => 2,
|
||
|
|
'JSONString' => 3,
|
||
|
|
'STRING' => 4,
|
||
|
|
'JSONNumber' => 5,
|
||
|
|
'NUMBER' => 6,
|
||
|
|
'JSONNullLiteral' => 7,
|
||
|
|
'NULL' => 8,
|
||
|
|
'JSONBooleanLiteral' => 9,
|
||
|
|
'TRUE' => 10,
|
||
|
|
'FALSE' => 11,
|
||
|
|
'JSONText' => 12,
|
||
|
|
'JSONValue' => 13,
|
||
|
|
'EOF' => 14,
|
||
|
|
'JSONObject' => 15,
|
||
|
|
'JSONArray' => 16,
|
||
|
|
'{' => 17,
|
||
|
|
'}' => 18,
|
||
|
|
'JSONMemberList' => 19,
|
||
|
|
'JSONMember' => 20,
|
||
|
|
':' => 21,
|
||
|
|
',' => 22,
|
||
|
|
'[' => 23,
|
||
|
|
']' => 24,
|
||
|
|
'JSONElementList' => 25,
|
||
|
|
'$accept' => 0,
|
||
|
|
'$end' => 1,
|
||
|
|
);
|
||
|
|
|
||
|
|
private $terminals_ = array(
|
||
|
|
2 => "error",
|
||
|
|
4 => "STRING",
|
||
|
|
6 => "NUMBER",
|
||
|
|
8 => "NULL",
|
||
|
|
10 => "TRUE",
|
||
|
|
11 => "FALSE",
|
||
|
|
14 => "EOF",
|
||
|
|
17 => "{",
|
||
|
|
18 => "}",
|
||
|
|
21 => ":",
|
||
|
|
22 => ",",
|
||
|
|
23 => "[",
|
||
|
|
24 => "]",
|
||
|
|
);
|
||
|
|
|
||
|
|
private $productions_ = array(
|
||
|
|
0,
|
||
|
|
array(3, 1),
|
||
|
|
array(5, 1),
|
||
|
|
array(7, 1),
|
||
|
|
array(9, 1),
|
||
|
|
array(9, 1),
|
||
|
|
array(12, 2),
|
||
|
|
array(13, 1),
|
||
|
|
array(13, 1),
|
||
|
|
array(13, 1),
|
||
|
|
array(13, 1),
|
||
|
|
array(13, 1),
|
||
|
|
array(13, 1),
|
||
|
|
array(15, 2),
|
||
|
|
array(15, 3),
|
||
|
|
array(20, 3),
|
||
|
|
array(19, 1),
|
||
|
|
array(19, 3),
|
||
|
|
array(16, 2),
|
||
|
|
array(16, 3),
|
||
|
|
array(25, 1),
|
||
|
|
array(25, 3)
|
||
|
|
);
|
||
|
|
|
||
|
|
private $table = array(array(3 => 5, 4 => array(1,12), 5 => 6, 6 => array(1,13), 7 => 3, 8 => array(1,9), 9 => 4, 10 => array(1,10), 11 => array(1,11), 12 => 1, 13 => 2, 15 => 7, 16 => 8, 17 => array(1,14), 23 => array(1,15)), array( 1 => array(3)), array( 14 => array(1,16)), array( 14 => array(2,7), 18 => array(2,7), 22 => array(2,7), 24 => array(2,7)), array( 14 => array(2,8), 18 => array(2,8), 22 => array(2,8), 24 => array(2,8)), array( 14 => array(2,9), 18 => array(2,9), 22 => array(2,9), 24 => array(2,9)), array( 14 => array(2,10), 18 => array(2,10), 22 => array(2,10), 24 => array(2,10)), array( 14 => array(2,11), 18 => array(2,11), 22 => array(2,11), 24 => array(2,11)), array( 14 => array(2,12), 18 => array(2,12), 22 => array(2,12), 24 => array(2,12)), array( 14 => array(2,3), 18 => array(2,3), 22 => array(2,3), 24 => array(2,3)), array( 14 => array(2,4), 18 => array(2,4), 22 => array(2,4), 24 => array(2,4)), array( 14 => array(2,5), 18 => array(2,5), 22 => array(2,5), 24 => array(2,5)), array( 14 => array(2,1), 18 => array(2,1), 21 => array(2,1), 22 => array(2,1), 24 => array(2,1)), array( 14 => array(2,2), 18 => array(2,2), 22 => array(2,2), 24 => array(2,2)), array( 3 => 20, 4 => array(1,12), 18 => array(1,17), 19 => 18, 20 => 19 ), array( 3 => 5, 4 => array(1,12), 5 => 6, 6 => array(1,13), 7 => 3, 8 => array(1,9), 9 => 4, 10 => array(1,10), 11 => array(1,11), 13 => 23, 15 => 7, 16 => 8, 17 => array(1,14), 23 => array(1,15), 24 => array(1,21), 25 => 22 ), array( 1 => array(2,6)), array( 14 => array(2,13), 18 => array(2,13), 22 => array(2,13), 24 => array(2,13)), array( 18 => array(1,24), 22 => array(1,25)), array( 18 => array(2,16), 22 => array(2,16)), array( 21 => array(1,26)), array( 14 => array(2,18), 18 => array(2,18), 22 => array(2,18), 24 => array(2,18)), array( 22 => array(1,28), 24 => array(1,27)), array( 22 => array(2,20), 24 => array(2,20)), array( 14 => array(2,14), 18 => array(2,14), 22 => array(2,14), 24 => array(2,14)), array( 3 => 20, 4 => array(1,12), 20 => 29 ), array( 3 => 5, 4 => array(1,12), 5 => 6, 6 => array(1,13), 7 => 3, 8 => array(1,9), 9 => 4, 10 => array(1,10), 11 => array(1,11), 13 => 30, 15 => 7, 16 => 8, 17 => array(1,14), 23 => array(1,15)), array( 14 => array(2,19), 18 => array(2,19), 22 => array(2,19), 24 => array(2,19)), array( 3 => 5, 4 => array(1,12), 5 => 6, 6 => array(1,13), 7 => 3, 8 => array(1,9), 9 => 4, 10 => array(1,10), 11 => array(1,11), 13 => 31, 15 => 7, 16 => 8, 17 => array(1,14), 23 => array(1,15)), array( 18 => array(2,17), 22 => array(2,17)), array( 18 => array(2,15), 22 => array(2,15)), array( 22 => array(2,21), 24 => array(2,21)),
|
||
|
|
);
|
||
|
|
|
||
|
|
private $defaultActions = array(
|
||
|
|
16 => array(2, 6)
|
||
|
|
);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param string $input JSON string
|
||
|
|
* @return null|JsonLintParsingException null if no error is found, a JsonLintParsingException containing all details otherwise
|
||
|
|
*/
|
||
|
|
public function lint($input)
|
||
|
|
{
|
||
|
|
try {
|
||
|
|
$this->parse($input);
|
||
|
|
} catch (JsonLintParsingException $e) {
|
||
|
|
return $e;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param string $input JSON string
|
||
|
|
* @return mixed
|
||
|
|
* @throws JsonLintParsingException
|
||
|
|
*/
|
||
|
|
public function parse($input, $flags = 0)
|
||
|
|
{
|
||
|
|
$this->failOnBOM($input);
|
||
|
|
|
||
|
|
$this->flags = $flags;
|
||
|
|
|
||
|
|
$this->stack = array(0);
|
||
|
|
$this->vstack = array(null);
|
||
|
|
$this->lstack = array();
|
||
|
|
|
||
|
|
$yytext = '';
|
||
|
|
$yylineno = 0;
|
||
|
|
$yyleng = 0;
|
||
|
|
$recovering = 0;
|
||
|
|
$TERROR = 2;
|
||
|
|
$EOF = 1;
|
||
|
|
|
||
|
|
$this->lexer = new JsonLintLexer();
|
||
|
|
$this->lexer->setInput($input);
|
||
|
|
|
||
|
|
$yyloc = $this->lexer->yylloc;
|
||
|
|
$this->lstack[] = $yyloc;
|
||
|
|
|
||
|
|
$symbol = null;
|
||
|
|
$preErrorSymbol = null;
|
||
|
|
$state = null;
|
||
|
|
$action = null;
|
||
|
|
$a = null;
|
||
|
|
$r = null;
|
||
|
|
$yyval = new stdClass;
|
||
|
|
$p = null;
|
||
|
|
$len = null;
|
||
|
|
$newState = null;
|
||
|
|
$expected = null;
|
||
|
|
$errStr = null;
|
||
|
|
|
||
|
|
while (true) {
|
||
|
|
// retrieve state number from top of stack
|
||
|
|
$state = $this->stack[count($this->stack)-1];
|
||
|
|
|
||
|
|
// use default actions if available
|
||
|
|
if (isset($this->defaultActions[$state])) {
|
||
|
|
$action = $this->defaultActions[$state];
|
||
|
|
} else {
|
||
|
|
if ($symbol == null) {
|
||
|
|
$symbol = $this->lex();
|
||
|
|
}
|
||
|
|
// read action for current state and first input
|
||
|
|
$action = isset($this->table[$state][$symbol]) ? $this->table[$state][$symbol] : false;
|
||
|
|
}
|
||
|
|
|
||
|
|
// handle parse error
|
||
|
|
if (!$action || !$action[0]) {
|
||
|
|
if (!$recovering) {
|
||
|
|
// Report error
|
||
|
|
$expected = array();
|
||
|
|
foreach ($this->table[$state] as $p => $ignore) {
|
||
|
|
if (isset($this->terminals_[$p]) && $p > 2) {
|
||
|
|
$expected[] = "'" . $this->terminals_[$p] . "'";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$message = null;
|
||
|
|
if (in_array("'STRING'", $expected) && in_array(substr($this->lexer->match, 0, 1), array('"', "'"))) {
|
||
|
|
$message = "Invalid string";
|
||
|
|
if ("'" === substr($this->lexer->match, 0, 1)) {
|
||
|
|
$message .= ", it appears you used single quotes instead of double quotes";
|
||
|
|
} elseif (preg_match('{".+?(\\\\[^"bfnrt/\\\\u])}', $this->lexer->getUpcomingInput(), $match)) {
|
||
|
|
$message .= ", it appears you have an unescaped backslash at: ".$match[1];
|
||
|
|
} elseif (preg_match('{"(?:[^"]+|\\\\")*$}m', $this->lexer->getUpcomingInput())) {
|
||
|
|
$message .= ", it appears you forgot to terminate the string, or attempted to write a multiline string which is invalid";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$errStr = 'Parse error on line ' . ($yylineno+1) . ":\n";
|
||
|
|
$errStr .= $this->lexer->showPosition() . "\n";
|
||
|
|
if ($message) {
|
||
|
|
$errStr .= $message;
|
||
|
|
} else {
|
||
|
|
$errStr .= (count($expected) > 1) ? "Expected one of: " : "Expected: ";
|
||
|
|
$errStr .= implode(', ', $expected);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (',' === substr(trim($this->lexer->getPastInput()), -1)) {
|
||
|
|
$errStr .= " - It appears you have an extra trailing comma";
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->parseError($errStr, array(
|
||
|
|
'text' => $this->lexer->match,
|
||
|
|
'token' => !empty($this->terminals_[$symbol]) ? $this->terminals_[$symbol] : $symbol,
|
||
|
|
'line' => $this->lexer->yylineno,
|
||
|
|
'loc' => $yyloc,
|
||
|
|
'expected' => $expected,
|
||
|
|
));
|
||
|
|
}
|
||
|
|
|
||
|
|
// just recovered from another error
|
||
|
|
if ($recovering == 3) {
|
||
|
|
if ($symbol == $EOF) {
|
||
|
|
throw new JsonLintParsingException($errStr ? $errStr : 'Parsing halted.');
|
||
|
|
}
|
||
|
|
|
||
|
|
// discard current lookahead and grab another
|
||
|
|
$yyleng = $this->lexer->yyleng;
|
||
|
|
$yytext = $this->lexer->yytext;
|
||
|
|
$yylineno = $this->lexer->yylineno;
|
||
|
|
$yyloc = $this->lexer->yylloc;
|
||
|
|
$symbol = $this->lex();
|
||
|
|
}
|
||
|
|
|
||
|
|
// try to recover from error
|
||
|
|
while (true) {
|
||
|
|
// check for error recovery rule in this state
|
||
|
|
if (array_key_exists($TERROR, $this->table[$state])) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if ($state == 0) {
|
||
|
|
throw new JsonLintParsingException($errStr ? $errStr : 'Parsing halted.');
|
||
|
|
}
|
||
|
|
$this->popStack(1);
|
||
|
|
$state = $this->stack[count($this->stack)-1];
|
||
|
|
}
|
||
|
|
|
||
|
|
$preErrorSymbol = $symbol; // save the lookahead token
|
||
|
|
$symbol = $TERROR; // insert generic error symbol as new lookahead
|
||
|
|
$state = $this->stack[count($this->stack)-1];
|
||
|
|
$action = isset($this->table[$state][$TERROR]) ? $this->table[$state][$TERROR] : false;
|
||
|
|
$recovering = 3; // allow 3 real symbols to be shifted before reporting a new error
|
||
|
|
}
|
||
|
|
|
||
|
|
// this shouldn't happen, unless resolve defaults are off
|
||
|
|
if (is_array($action[0]) && count($action) > 1) {
|
||
|
|
throw new JsonLintParsingException('Parse Error: multiple actions possible at state: ' . $state . ', token: ' . $symbol);
|
||
|
|
}
|
||
|
|
|
||
|
|
switch ($action[0]) {
|
||
|
|
case 1: // shift
|
||
|
|
$this->stack[] = $symbol;
|
||
|
|
$this->vstack[] = $this->lexer->yytext;
|
||
|
|
$this->lstack[] = $this->lexer->yylloc;
|
||
|
|
$this->stack[] = $action[1]; // push state
|
||
|
|
$symbol = null;
|
||
|
|
if (!$preErrorSymbol) { // normal execution/no error
|
||
|
|
$yyleng = $this->lexer->yyleng;
|
||
|
|
$yytext = $this->lexer->yytext;
|
||
|
|
$yylineno = $this->lexer->yylineno;
|
||
|
|
$yyloc = $this->lexer->yylloc;
|
||
|
|
if ($recovering > 0) {
|
||
|
|
$recovering--;
|
||
|
|
}
|
||
|
|
} else { // error just occurred, resume old lookahead f/ before error
|
||
|
|
$symbol = $preErrorSymbol;
|
||
|
|
$preErrorSymbol = null;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 2: // reduce
|
||
|
|
$len = $this->productions_[$action[1]][1];
|
||
|
|
|
||
|
|
// perform semantic action
|
||
|
|
$yyval->token = $this->vstack[count($this->vstack) - $len]; // default to $$ = $1
|
||
|
|
// default location, uses first token for firsts, last for lasts
|
||
|
|
$yyval->store = array( // _$ = store
|
||
|
|
'first_line' => $this->lstack[count($this->lstack) - ($len ? $len : 1)]['first_line'],
|
||
|
|
'last_line' => $this->lstack[count($this->lstack) - 1]['last_line'],
|
||
|
|
'first_column' => $this->lstack[count($this->lstack) - ($len ? $len : 1)]['first_column'],
|
||
|
|
'last_column' => $this->lstack[count($this->lstack) - 1]['last_column'],
|
||
|
|
);
|
||
|
|
$r = $this->performAction($yyval, $yytext, $yyleng, $yylineno, $action[1], $this->vstack, $this->lstack);
|
||
|
|
|
||
|
|
if (!$r instanceof JsonLintUndefined) {
|
||
|
|
return $r;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($len) {
|
||
|
|
$this->popStack($len);
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->stack[] = $this->productions_[$action[1]][0]; // push nonterminal (reduce)
|
||
|
|
$this->vstack[] = $yyval->token;
|
||
|
|
$this->lstack[] = $yyval->store;
|
||
|
|
$newState = $this->table[$this->stack[count($this->stack)-2]][$this->stack[count($this->stack)-1]];
|
||
|
|
$this->stack[] = $newState;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 3: // accept
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
protected function parseError($str, $hash)
|
||
|
|
{
|
||
|
|
throw new JsonLintParsingException($str, $hash);
|
||
|
|
}
|
||
|
|
|
||
|
|
// $$ = $tokens // needs to be passed by ref?
|
||
|
|
// $ = $token
|
||
|
|
// _$ removed, useless?
|
||
|
|
private function performAction(stdClass $yyval, $yytext, $yyleng, $yylineno, $yystate, &$tokens)
|
||
|
|
{
|
||
|
|
// $0 = $len
|
||
|
|
$len = count($tokens) - 1;
|
||
|
|
switch ($yystate) {
|
||
|
|
case 1:
|
||
|
|
$yytext = preg_replace_callback('{(?:\\\\["bfnrt/\\\\]|\\\\u[a-fA-F0-9]{4})}', array($this, 'stringInterpolation'), $yytext);
|
||
|
|
$yyval->token = $yytext;
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
if (strpos($yytext, 'e') !== false || strpos($yytext, 'E') !== false) {
|
||
|
|
$yyval->token = floatval($yytext);
|
||
|
|
} else {
|
||
|
|
$yyval->token = strpos($yytext, '.') === false ? intval($yytext) : floatval($yytext);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 3:
|
||
|
|
$yyval->token = null;
|
||
|
|
break;
|
||
|
|
case 4:
|
||
|
|
$yyval->token = true;
|
||
|
|
break;
|
||
|
|
case 5:
|
||
|
|
$yyval->token = false;
|
||
|
|
break;
|
||
|
|
case 6:
|
||
|
|
return $yyval->token = $tokens[$len-1];
|
||
|
|
case 13:
|
||
|
|
if ($this->flags & self::PARSE_TO_ASSOC) {
|
||
|
|
$yyval->token = array();
|
||
|
|
} else {
|
||
|
|
$yyval->token = new stdClass;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 14:
|
||
|
|
$yyval->token = $tokens[$len-1];
|
||
|
|
break;
|
||
|
|
case 15:
|
||
|
|
$yyval->token = array($tokens[$len-2], $tokens[$len]);
|
||
|
|
break;
|
||
|
|
case 16:
|
||
|
|
$property = $tokens[$len][0];
|
||
|
|
if ($this->flags & self::PARSE_TO_ASSOC) {
|
||
|
|
$yyval->token = array();
|
||
|
|
$yyval->token[$property] = $tokens[$len][1];
|
||
|
|
} else {
|
||
|
|
$yyval->token = new stdClass;
|
||
|
|
$yyval->token->$property = $tokens[$len][1];
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 17:
|
||
|
|
if ($this->flags & self::PARSE_TO_ASSOC) {
|
||
|
|
$yyval->token =& $tokens[$len-2];
|
||
|
|
$key = $tokens[$len][0];
|
||
|
|
if (($this->flags & self::DETECT_KEY_CONFLICTS) && isset($tokens[$len-2][$key])) {
|
||
|
|
$errStr = 'Parse error on line ' . ($yylineno+1) . ":\n";
|
||
|
|
$errStr .= $this->lexer->showPosition() . "\n";
|
||
|
|
$errStr .= "Duplicate key: ".$tokens[$len][0];
|
||
|
|
throw new JsonLintParsingException($errStr);
|
||
|
|
} elseif (($this->flags & self::ALLOW_DUPLICATE_KEYS) && isset($tokens[$len-2][$key])) {
|
||
|
|
// Forget about it...
|
||
|
|
}
|
||
|
|
$tokens[$len-2][$key] = $tokens[$len][1];
|
||
|
|
} else {
|
||
|
|
$yyval->token = $tokens[$len-2];
|
||
|
|
$key = $tokens[$len][0];
|
||
|
|
if (($this->flags & self::DETECT_KEY_CONFLICTS) && isset($tokens[$len-2]->{$key})) {
|
||
|
|
$errStr = 'Parse error on line ' . ($yylineno+1) . ":\n";
|
||
|
|
$errStr .= $this->lexer->showPosition() . "\n";
|
||
|
|
$errStr .= "Duplicate key: ".$tokens[$len][0];
|
||
|
|
throw new JsonLintParsingException($errStr);
|
||
|
|
} elseif (($this->flags & self::ALLOW_DUPLICATE_KEYS) && isset($tokens[$len-2]->{$key})) {
|
||
|
|
$duplicateCount = 1;
|
||
|
|
do {
|
||
|
|
$duplicateKey = $key . '.' . $duplicateCount++;
|
||
|
|
} while (isset($tokens[$len-2]->$duplicateKey));
|
||
|
|
$key = $duplicateKey;
|
||
|
|
}
|
||
|
|
$tokens[$len-2]->$key = $tokens[$len][1];
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 18:
|
||
|
|
$yyval->token = array();
|
||
|
|
break;
|
||
|
|
case 19:
|
||
|
|
$yyval->token = $tokens[$len-1];
|
||
|
|
break;
|
||
|
|
case 20:
|
||
|
|
$yyval->token = array($tokens[$len]);
|
||
|
|
break;
|
||
|
|
case 21:
|
||
|
|
$tokens[$len-2][] = $tokens[$len];
|
||
|
|
$yyval->token = $tokens[$len-2];
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return new JsonLintUndefined();
|
||
|
|
}
|
||
|
|
|
||
|
|
private function stringInterpolation($match)
|
||
|
|
{
|
||
|
|
switch ($match[0]) {
|
||
|
|
case '\\\\':
|
||
|
|
return '\\';
|
||
|
|
case '\"':
|
||
|
|
return '"';
|
||
|
|
case '\b':
|
||
|
|
return chr(8);
|
||
|
|
case '\f':
|
||
|
|
return chr(12);
|
||
|
|
case '\n':
|
||
|
|
return "\n";
|
||
|
|
case '\r':
|
||
|
|
return "\r";
|
||
|
|
case '\t':
|
||
|
|
return "\t";
|
||
|
|
case '\/':
|
||
|
|
return "/";
|
||
|
|
default:
|
||
|
|
return html_entity_decode('&#x'.ltrim(substr($match[0], 2), '0').';', 0, 'UTF-8');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private function popStack($n)
|
||
|
|
{
|
||
|
|
$this->stack = array_slice($this->stack, 0, - (2 * $n));
|
||
|
|
$this->vstack = array_slice($this->vstack, 0, - $n);
|
||
|
|
$this->lstack = array_slice($this->lstack, 0, - $n);
|
||
|
|
}
|
||
|
|
|
||
|
|
private function lex()
|
||
|
|
{
|
||
|
|
$token = $this->lexer->lex();
|
||
|
|
if (!$token) {
|
||
|
|
$token = 1;
|
||
|
|
}
|
||
|
|
// if token isn't its numeric value, convert
|
||
|
|
if (!is_numeric($token)) {
|
||
|
|
$token = isset($this->symbols[$token]) ? $this->symbols[$token] : $token;
|
||
|
|
}
|
||
|
|
|
||
|
|
return $token;
|
||
|
|
}
|
||
|
|
|
||
|
|
private function failOnBOM($input)
|
||
|
|
{
|
||
|
|
// UTF-8 ByteOrderMark sequence
|
||
|
|
$bom = "\xEF\xBB\xBF";
|
||
|
|
|
||
|
|
if (substr($input, 0, 3) === $bom) {
|
||
|
|
$this->parseError("BOM detected, make sure your input does not include a Unicode Byte-Order-Mark", array());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|