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<?php
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
* @package thrift.transport
*/
namespace Thrift\Transport;
use Thrift\Exception\TTransportException;
use Thrift\Factory\TStringFuncFactory;
/**
* A memory buffer is a tranpsort that simply reads from and writes to an
* in-memory string buffer. Anytime you call write on it, the data is simply
* placed into a buffer, and anytime you call read, data is read from that
* buffer.
*
* @package thrift.transport
*/
class TMemoryBuffer extends TTransport
{
/**
* Constructor. Optionally pass an initial value
* for the buffer.
*/
public function __construct($buf = '')
{
$this->buf_ = $buf;
}
protected $buf_ = '';
public function isOpen()
{
return true;
}
public function open()
{
}
public function close()
{
}
public function write($buf)
{
$this->buf_ .= $buf;
}
public function read($len)
{
$bufLength = TStringFuncFactory::create()->strlen($this->buf_);
if ($bufLength === 0) {
throw new TTransportException(
'TMemoryBuffer: Could not read ' .
$len . ' bytes from buffer.',
TTransportException::UNKNOWN
);
}
if ($bufLength <= $len) {
$ret = $this->buf_;
$this->buf_ = '';
return $ret;
}
$ret = TStringFuncFactory::create()->substr($this->buf_, 0, $len);
$this->buf_ = TStringFuncFactory::create()->substr($this->buf_, $len);
return $ret;
}
public function getBuffer()
{
return $this->buf_;
}
public function available()
{
return TStringFuncFactory::create()->strlen($this->buf_);
}
public function putBack($data)
{
$this->buf_ = $data . $this->buf_;
}
}
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