Proyectos de Subversion Moodle

Rev

| Ultima modificación | Ver Log |

Rev Autor Línea Nro. Línea
1 efrain 1 
<?php
2 
 
3 
declare(strict_types=1);
4 
 
5 
namespace MaxMind\Db\Reader;
6 
 
7 
class Util
8 
{
9 
    /**
10 
     * @param resource $stream
11 
     */
12 
    public static function read($stream, int $offset, int $numberOfBytes): string
13 
    {
14 
        if ($numberOfBytes === 0) {
15 
            return '';
16 
        }
17 
        if (fseek($stream, $offset) === 0) {
18 
            $value = fread($stream, $numberOfBytes);
19 
 
20 
            // We check that the number of bytes read is equal to the number
21 
            // asked for. We use ftell as getting the length of $value is
22 
            // much slower.
23 
            if ($value !== false && ftell($stream) - $offset === $numberOfBytes) {
24 
                return $value;
25 
            }
26 
        }
27 
 
28 
        throw new InvalidDatabaseException(
29 
            'The MaxMind DB file contains bad data'
30 
        );
31 
    }
32 
}