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File: classes/parser/parser-exception.php

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  Classes of Gonzalo Chumillas  >  Ses Parser  >  classes/parser/parser-exception.php  >  Download  
File: classes/parser/parser-exception.php
Role: Class source
Content type: text/plain
Description: ParserException class
Class: Ses Parser
Parse a string with an expression of any type
Author: By
Last change: Fix bug
Date: 2 years ago
Size: 1,886 bytes
 

Contents

Class file image Download
<?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;
    }
}