00001 /* 00002 * Copyright 2004-2006 Intel Corporation 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00017 #ifndef _OASYS_STREAM_BUFFER_H_ 00018 #define _OASYS_STREAM_BUFFER_H_ 00019 00020 #include <stdlib.h> 00021 00022 namespace oasys { 00023 00034 class StreamBuffer { 00035 public: 00039 StreamBuffer(size_t size = DEFAULT_BUFSIZE); 00040 ~StreamBuffer(); 00041 00046 void set_size(size_t size); 00047 00050 char* data() { return &buf_[0]; } 00051 00053 char* start(); 00054 00056 char* end(); 00057 00059 void reserve(size_t amount); 00060 00062 void fill(size_t amount); 00063 00065 void consume(size_t amount); 00066 00068 void clear(); 00069 00071 size_t size() { return size_; } 00072 00074 size_t fullbytes(); 00075 00077 size_t tailbytes(); 00078 00079 private: 00081 void realloc(size_t size); 00082 00086 void moveup(); 00087 00088 size_t start_; 00089 size_t end_; 00090 size_t size_; 00091 00092 char* buf_; 00093 00094 static const size_t DEFAULT_BUFSIZE = 512; 00095 }; 00096 00097 } // namespace oasys 00098 00099 #endif //_OASYS_STREAM_BUFFER_H_