ceph/src/jaegertracing/thrift/lib/php/lib/Protocol/JSON/LookaheadReader.php

   1 <?php
   2 /*
   3  * Licensed to the Apache Software Foundation (ASF) under one
   4  * or more contributor license agreements. See the NOTICE file
   5  * distributed with this work for additional information
   6  * regarding copyright ownership. The ASF licenses this file
   7  * to you under the Apache License, Version 2.0 (the
   8  * "License"); you may not use this file except in compliance
   9  * with the License. You may obtain a copy of the License at
  10  *
  11  *   http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing,
  14  * software distributed under the License is distributed on an
  15  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  16  * KIND, either express or implied. See the License for the
  17  * specific language governing permissions and limitations
  18  * under the License.
  19  *
  20  * @package thrift.protocol
  21  */
  22
  23 namespace Thrift\Protocol\JSON;
  24
  25 class LookaheadReader
  26 {
  27     private $hasData_ = false;
  28     private $data_ = array();
  29     private $p_;
  30
  31     public function __construct($p)
  32     {
  33         $this->p_ = $p;
  34     }
  35
  36     public function read()
  37     {
  38         if ($this->hasData_) {
  39             $this->hasData_ = false;
  40         } else {
  41             $this->data_ = $this->p_->getTransport()->readAll(1);
  42         }
  43
  44         return substr($this->data_, 0, 1);
  45     }
  46
  47     public function peek()
  48     {
  49         if (!$this->hasData_) {
  50             $this->data_ = $this->p_->getTransport()->readAll(1);
  51         }
  52
  53         $this->hasData_ = true;
  54
  55         return substr($this->data_, 0, 1);
  56     }
  57 }