<?php
/**
* class ParserException
* The only purpose of this class is to provide a method to get printable messages.
*/
class ParserException extends Exception {
/**
* The parser instance that threw the exception.
* @var Parser
*/
private $parser;
/**
* @param Parser $parser
* @param string $message
* @param int $code = 0
* @param Exception $previous = NULL
*/
public function __construct($parser, $message, $code = 0, $previous = NULL) {
$this->parser = $parser;
parent::__construct($message, $code, $previous);
}
/**
* Gets a printable message.
* This function provides a method to get printable messages.
* @return string
*/
public function getPrintableMessage() {
$ret = "";
$message = $this->parser->end() ? "Unexpected end of line" : $this->message;
$string = rtrim($this->parser->string());
$offset = $this->parser->offset();
$right_str = substr($string, $offset);
$offset0 = $offset + strlen($right_str) - strlen(ltrim($right_str));
$str1 = substr($string, 0, $offset0);
$offset1 = strrpos($str1, "\n");
if ($offset1 !== FALSE) {
$offset1++;
}
$str2 = substr($string, $offset1);
$offset2 = strpos($str2, "\n");
if ($offset2 === FALSE) {
$offset2 = strlen($str2);
}
$str3 = substr($str2, 0, $offset2);
$line = $offset0 > 0? substr_count($string, "\n", 0, $offset0) : 0;
$column = $offset0 - $offset1;
$ret = "$str3\n" . str_repeat(" ", $column) . "^$message";
if ($line > 0) {
$ret .= " (line " . ($line + 1) . ")";
}
return $ret;
}
public function __toString() {
return __CLASS__ . ":\n\n" . $this->getPrintableMessage() . "\n";
}
}
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