/usr/share/php/Symfony/Component/VarDumper/Dumper/AbstractDumper.php is in php-symfony-var-dumper 2.7.10-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\VarDumper\Dumper;
use Symfony\Component\VarDumper\Cloner\Data;
use Symfony\Component\VarDumper\Cloner\DumperInterface;
/**
* Abstract mechanism for dumping a Data object.
*
* @author Nicolas Grekas <p@tchwork.com>
*/
abstract class AbstractDumper implements DataDumperInterface, DumperInterface
{
public static $defaultOutput = 'php://output';
protected $line = '';
protected $lineDumper;
protected $outputStream;
protected $decimalPoint; // This is locale dependent
protected $indentPad = ' ';
private $charset;
private $charsetConverter;
/**
* @param callable|resource|string|null $output A line dumper callable, an opened stream or an output path, defaults to static::$defaultOutput.
* @param string $charset The default character encoding to use for non-UTF8 strings.
*/
public function __construct($output = null, $charset = null)
{
$this->setCharset($charset ?: ini_get('php.output_encoding') ?: ini_get('default_charset') ?: 'UTF-8');
$this->decimalPoint = (string) 0.5;
$this->decimalPoint = $this->decimalPoint[1];
$this->setOutput($output ?: static::$defaultOutput);
if (!$output && is_string(static::$defaultOutput)) {
static::$defaultOutput = $this->outputStream;
}
}
/**
* Sets the output destination of the dumps.
*
* @param callable|resource|string $output A line dumper callable, an opened stream or an output path.
*
* @return callable|resource|string The previous output destination.
*/
public function setOutput($output)
{
$prev = null !== $this->outputStream ? $this->outputStream : $this->lineDumper;
if (is_callable($output)) {
$this->outputStream = null;
$this->lineDumper = $output;
} else {
if (is_string($output)) {
$output = fopen($output, 'wb');
}
$this->outputStream = $output;
$this->lineDumper = array($this, 'echoLine');
}
return $prev;
}
/**
* Sets the default character encoding to use for non-UTF8 strings.
*
* @param string $charset The default character encoding to use for non-UTF8 strings.
*
* @return string The previous charset.
*/
public function setCharset($charset)
{
$prev = $this->charset;
$this->charsetConverter = 'fallback';
$charset = strtoupper($charset);
$charset = null === $charset || 'UTF-8' === $charset || 'UTF8' === $charset ? 'CP1252' : $charset;
$supported = true;
set_error_handler(function () use (&$supported) {$supported = false;});
if (function_exists('mb_encoding_aliases') && mb_encoding_aliases($charset)) {
$this->charset = $charset;
$this->charsetConverter = 'mbstring';
} elseif (function_exists('iconv')) {
$supported = true;
iconv($charset, 'UTF-8', '');
if ($supported) {
$this->charset = $charset;
$this->charsetConverter = 'iconv';
}
}
if ('fallback' === $this->charsetConverter) {
$this->charset = 'ISO-8859-1';
}
restore_error_handler();
return $prev;
}
/**
* Sets the indentation pad string.
*
* @param string $pad A string the will be prepended to dumped lines, repeated by nesting level.
*
* @return string The indent pad.
*/
public function setIndentPad($pad)
{
$prev = $this->indentPad;
$this->indentPad = $pad;
return $prev;
}
/**
* Dumps a Data object.
*
* @param Data $data A Data object.
* @param callable|resource|string|null $output A line dumper callable, an opened stream or an output path.
*/
public function dump(Data $data, $output = null)
{
$exception = null;
if ($output) {
$prevOutput = $this->setOutput($output);
}
try {
$data->dump($this);
$this->dumpLine(-1);
} catch (\Exception $exception) {
// Re-thrown below
}
if ($output) {
$this->setOutput($prevOutput);
}
if (null !== $exception) {
throw $exception;
}
}
/**
* Dumps the current line.
*
* @param int $depth The recursive depth in the dumped structure for the line being dumped.
*/
protected function dumpLine($depth)
{
call_user_func($this->lineDumper, $this->line, $depth, $this->indentPad);
$this->line = '';
}
/**
* Generic line dumper callback.
*
* @param string $line The line to write.
* @param int $depth The recursive depth in the dumped structure.
*/
protected function echoLine($line, $depth, $indentPad)
{
if (-1 !== $depth) {
fwrite($this->outputStream, str_repeat($indentPad, $depth).$line."\n");
}
}
/**
* Converts a non-UTF-8 string to UTF-8.
*
* @param string $s The non-UTF-8 string to convert.
*
* @return string The string converted to UTF-8.
*/
protected function utf8Encode($s)
{
if ('mbstring' === $this->charsetConverter) {
return mb_convert_encoding($s, 'UTF-8', mb_check_encoding($s, $this->charset) ? $this->charset : '8bit');
}
if ('iconv' === $this->charsetConverter) {
$valid = true;
set_error_handler(function () use (&$valid) {$valid = false;});
$c = iconv($this->charset, 'UTF-8', $s);
restore_error_handler();
if ($valid) {
return $c;
}
}
$s .= $s;
$len = strlen($s);
for ($i = $len >> 1, $j = 0; $i < $len; ++$i, ++$j) {
switch (true) {
case $s[$i] < "\x80":
$s[$j] = $s[$i];
break;
case $s[$i] < "\xC0":
$s[$j] = "\xC2";
$s[++$j] = $s[$i];
break;
default:
$s[$j] = "\xC3";
$s[++$j] = chr(ord($s[$i]) - 64);
break;
}
}
return substr($s, 0, $j);
}
}
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