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<?php
/*
* 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 const DUMP_LIGHT_ARRAY = 1;
public const DUMP_STRING_LENGTH = 2;
public const DUMP_COMMA_SEPARATOR = 4;
public const DUMP_TRAILING_COMMA = 8;
public static $defaultOutput = 'php://output';
protected $line = '';
protected $lineDumper;
protected $outputStream;
protected $decimalPoint = '.';
protected $indentPad = ' ';
protected $flags;
private string $charset = '';
/**
* @param callable|resource|string|null $output A line dumper callable, an opened stream or an output path, defaults to static::$defaultOutput
* @param string|null $charset The default character encoding to use for non-UTF8 strings
* @param int $flags A bit field of static::DUMP_* constants to fine tune dumps representation
*/
public function __construct($output = null, string $charset = null, int $flags = 0)
{
$this->flags = $flags;
$this->setCharset($charset ?: \ini_get('php.output_encoding') ?: \ini_get('default_charset') ?: 'UTF-8');
$this->setOutput($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 = $this->outputStream ?? $this->lineDumper;
if (\is_callable($output)) {
$this->outputStream = null;
$this->lineDumper = $output;
} else {
if (\is_string($output)) {
$output = fopen($output, 'w');
}
$this->outputStream = $output;
$this->lineDumper = [$this, 'echoLine'];
}
return $prev;
}
/**
* Sets the default character encoding to use for non-UTF8 strings.
*
* @return string The previous charset
*/
public function setCharset(string $charset): string
{
$prev = $this->charset;
$charset = strtoupper($charset);
$charset = null === $charset || 'UTF-8' === $charset || 'UTF8' === $charset ? 'CP1252' : $charset;
$this->charset = $charset;
return $prev;
}
/**
* Sets the indentation pad string.
*
* @param string $pad A string that will be prepended to dumped lines, repeated by nesting level
*
* @return string The previous indent pad
*/
public function setIndentPad(string $pad): string
{
$prev = $this->indentPad;
$this->indentPad = $pad;
return $prev;
}
/**
* Dumps a Data object.
*
* @param callable|resource|string|true|null $output A line dumper callable, an opened stream, an output path or true to return the dump
*
* @return string|null The dump as string when $output is true
*/
public function dump(Data $data, $output = null): ?string
{
if ($locale = $this->flags & (self::DUMP_COMMA_SEPARATOR | self::DUMP_TRAILING_COMMA) ? setlocale(\LC_NUMERIC, 0) : null) {
setlocale(\LC_NUMERIC, 'C');
}
if ($returnDump = true === $output) {
$output = fopen('php://memory', 'r+');
}
if ($output) {
$prevOutput = $this->setOutput($output);
}
try {
$data->dump($this);
$this->dumpLine(-1);
if ($returnDump) {
$result = stream_get_contents($output, -1, 0);
fclose($output);
return $result;
}
} finally {
if ($output) {
$this->setOutput($prevOutput);
}
if ($locale) {
setlocale(\LC_NUMERIC, $locale);
}
}
return null;
}
/**
* Dumps the current line.
*
* @param int $depth The recursive depth in the dumped structure for the line being dumped,
* or -1 to signal the end-of-dump to the line dumper callable
*/
protected function dumpLine(int $depth)
{
($this->lineDumper)($this->line, $depth, $this->indentPad);
$this->line = '';
}
/**
* Generic line dumper callback.
*/
protected function echoLine(string $line, int $depth, string $indentPad)
{
if (-1 !== $depth) {
fwrite($this->outputStream, str_repeat($indentPad, $depth).$line."\n");
}
}
/**
* Converts a non-UTF-8 string to UTF-8.
*/
protected function utf8Encode(?string $s): ?string
{
if (null === $s || preg_match('//u', $s)) {
return $s;
}
if (!\function_exists('iconv')) {
throw new \RuntimeException('Unable to convert a non-UTF-8 string to UTF-8: required function iconv() does not exist. You should install ext-iconv or symfony/polyfill-iconv.');
}
if (false !== $c = @iconv($this->charset, 'UTF-8', $s)) {
return $c;
}
if ('CP1252' !== $this->charset && false !== $c = @iconv('CP1252', 'UTF-8', $s)) {
return $c;
}
return iconv('CP850', 'UTF-8', $s);
}
}
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