/**
* Returns the size of the PHP bootstrap script.
*
* @return integer The size of the PHP bootstrap script.
*
* @throws ReaderException If the size could not be determined.
*/
private function getBootstrapSize()
{
if (null === $this->bootstrapSize) {
$position = $this->file->tell();
$sequence = '__HALT_COMPILER();';
$length = strlen($sequence);
$offset = 0;
$this->file->seek(0);
/*
* The purpose of iterating through the file is so that a pattern,
* "__HALT_COMPILER();" can be found. Once this pattern is found,
* the current position is used as the size of the PHP bootstrap
* script. The problem is that this is very slow and can probably
* be optimized in the future.
*/
foreach ($this->file->iterate(0, 1) as $char) {
if ($sequence[$offset] === $char) {
$offset++;
if ($offset === $length) {
$this->bootstrapSize = $this->file->tell();
break;
}
} else {
$offset = 0;
}
}
$this->file->seek($position);
if (null === $this->bootstrapSize) {
// @codeCoverageIgnoreStart
throw new ReaderException('`__HALT_COMPILER();` is missing in the PHP bootstrap script.');
// @codeCoverageIgnoreEnd
}
}
return $this->bootstrapSize;
}
/**
* Generates a new raw SHA-1 hash signature for a Sqon file manager.
*
* @param FileInterface $file The Sqon file manager.
* @param boolean $signed The Sqon has a signature?
*
* @return string The new raw SHA-1 hash.
*/
public function generate(FileInterface $file, $signed = false)
{
$context = hash_init('sha1');
$bytes = 0;
if ($signed) {
$bytes = $file->size() - 20;
}
$file->seek(0);
foreach ($file->iterate($bytes) as $buffer) {
hash_update($context, $buffer);
}
return hash_final($context, true);
}
/**
* {@inheritdoc}
*/
public function stream(FileInterface $file, $bytes = 0, $buffer = 1024)
{
foreach ($file->iterate($bytes, $buffer) as $chunk) {
$this->write($chunk);
}
}
