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<?php
/*
* This file is part of the php-code-coverage package.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace SebastianBergmann\CodeCoverage\Driver;
use SebastianBergmann\CodeCoverage\RuntimeException;
/**
* Driver for Xdebug's code coverage functionality.
*
* @codeCoverageIgnore
*/
class Xdebug implements Driver
{
/**
* Cache the number of lines for each file
*
* @var array
*/
private $cacheNumLines = [];
/**
* Constructor.
*/
public function __construct()
{
if (!extension_loaded('xdebug')) {
throw new RuntimeException('This driver requires Xdebug');
}
if (version_compare(phpversion('xdebug'), '2.2.1', '>=') &&
!ini_get('xdebug.coverage_enable')) {
throw new RuntimeException(
'xdebug.coverage_enable=On has to be set in php.ini'
);
}
}
/**
* Start collection of code coverage information.
*
* @param bool $determineUnusedAndDead
*/
public function start($determineUnusedAndDead = true)
{
if ($determineUnusedAndDead) {
xdebug_start_code_coverage(XDEBUG_CC_UNUSED | XDEBUG_CC_DEAD_CODE);
} else {
xdebug_start_code_coverage();
}
}
/**
* Stop collection of code coverage information.
*
* @return array
*/
public function stop()
{
$data = xdebug_get_code_coverage();
xdebug_stop_code_coverage();
return $this->cleanup($data);
}
/**
* @param array $data
*
* @return array
*/
private function cleanup(array $data)
{
foreach (array_keys($data) as $file) {
unset($data[$file][0]);
if (strpos($file, 'xdebug://debug-eval') !== 0 && file_exists($file)) {
$numLines = $this->getNumberOfLinesInFile($file);
foreach (array_keys($data[$file]) as $line) {
if ($line > $numLines) {
unset($data[$file][$line]);
}
}
}
}
return $data;
}
/**
* @param string $file
*
* @return int
*/
private function getNumberOfLinesInFile($file)
{
if (!isset($this->cacheNumLines[$file])) {
$buffer = file_get_contents($file);
$lines = substr_count($buffer, "\n");
if (substr($buffer, -1) !== "\n") {
$lines++;
}
$this->cacheNumLines[$file] = $lines;
}
return $this->cacheNumLines[$file];
}
}
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