1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #include "data_buffer.h" 17 18 namespace OHOS { 19 namespace AppDistributedKv { 20 int DataBuffer::sequence_ = 0; 21 22 const size_t DataBuffer::MAX_DATA_LEN = 1024 * 1024 * 5; 23 24 const int DataBuffer::MAX_TRANSFER_SIZE = 1024 * 1024 * 5 - DataBuffer::HEADER_LEN; 25 26 const uint32_t DataBuffer::VERSION = 0; 27 28 const uint32_t DataBuffer::TYPE = 0; 29 DataBuffer()30DataBuffer::DataBuffer() : buf_(nullptr), size_(0), used_(0) 31 {} 32 ~DataBuffer()33DataBuffer::~DataBuffer() 34 { 35 if (buf_ != nullptr) { 36 delete[] buf_; 37 buf_ = nullptr; 38 } 39 } 40 Init(size_t size)41bool DataBuffer::Init(size_t size) 42 { 43 if (buf_ != nullptr || size == 0) { 44 return false; 45 } 46 size_ = std::min(size, MAX_DATA_LEN); 47 buf_ = new(std::nothrow) char[size_](); 48 if (buf_ == nullptr) { 49 return false; 50 } 51 used_ = 0; 52 return true; 53 } 54 GetBufPtr() const55const char *DataBuffer::GetBufPtr() const 56 { 57 return buf_; 58 } 59 GetBufSize() const60size_t DataBuffer::GetBufSize() const 61 { 62 return size_; 63 } 64 SetBufUsed(size_t used)65void DataBuffer::SetBufUsed(size_t used) 66 { 67 used_ = used; 68 } 69 GetBufUsed() const70size_t DataBuffer::GetBufUsed() const 71 { 72 return used_; 73 } 74 } // namespace AppDistributedKv 75 } // namespace OHOS 76