/**
* Reads the given amount of characters from the input stream.
*
* @param int $length The number of characters to read.
* @param string $default The default to return if interaction is disabled.
*
* @return string The characters read from the input stream.
*
* @throws IOException If reading fails or if the input stream is closed.
*/
public function read($length, $default = null)
{
if (!$this->interactive) {
return $default;
}
return $this->stream->read($length);
}
/**
* Reads stream contents
*
* @param io.streams.InputStream is
* @return string bytes
*/
protected function readAll(InputStream $is)
{
for ($contents = ''; $is->available();) {
$contents .= $is->read();
}
$is->close();
return $contents;
}
/**
* Read a line
*
* @param io.streams.InputStream in
* @return string
* @throws lang.FormatException if no line can be read
*/
protected function readLine(InputStream $in)
{
$line = '';
while ("\n" !== ($chr = $in->read(1))) {
$line .= $chr;
if (!$in->available()) {
break;
}
}
return $line;
}
/**
* Constructor
*
* @param io.streams.InputStream in
*/
public function __construct(InputStream $in)
{
// Read GZIP format header
// * ID1, ID2 (Identification, \x1F, \x8B)
// * CM (Compression Method, 8 = deflate)
// * FLG (Flags)
// * MTIME (Modification time, Un*x timestamp)
// * XFL (Extra flags)
// * OS (Operating system)
$header = unpack('a2id/Cmethod/Cflags/Vtime/Cextra/Cos', $in->read(10));
if (" ‹" != $header['id']) {
throw new IOException('Invalid format, expected \\037\\213, have ' . addcslashes($header['id'], "..ÿ"));
}
if (8 != $header['method']) {
throw new IOException('Unknown compression method #' . $header['method']);
}
// Now, convert stream to file handle and append inflating filter
$wri = 'zlib.bounded://' . $in->hashCode();
self::$wrapped[$wri] = $in;
$this->in = fopen($wri, 'r');
if (!stream_filter_append($this->in, 'zlib.inflate', STREAM_FILTER_READ)) {
throw new IOException('Could not append stream filter');
}
}
/**
* Read data from file.
* @param int $len Num chars to read.
* @return string chars read or -1 if eof.
*/
public function read($len = null)
{
return $this->inStream->read($len);
}
/**
* Read an IOElements' contents completely into a buffer in a single call.
*
* @param io.streams.InputStream s
* @return string
* @throws io.IOException
*/
public static function readAll(InputStream $s)
{
$r = '';
while ($s->available() > 0) {
$r .= $s->read();
}
return $r;
}
