1 /* 2 * Copyright (c) 2025 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 #ifndef OHOS_MECH_DATA_BUFFER_H 17 #define OHOS_MECH_DATA_BUFFER_H 18 19 #include <string> 20 21 namespace OHOS { 22 namespace MechBodyController { 23 class MechDataBuffer { 24 public: 25 explicit MechDataBuffer(size_t capacity); 26 ~MechDataBuffer(); 27 28 size_t Size(); 29 size_t Offset(); 30 size_t Capacity(); 31 uint8_t *Data(); 32 int32_t SetRange(size_t offset, size_t size); 33 34 int32_t AppendUint8(uint8_t value); 35 int32_t AppendUint16(uint16_t value); 36 int32_t AppendUint32(uint32_t value); 37 int32_t AppendUint64(uint64_t value); 38 int32_t AppendFloat(float value); 39 int32_t AppendDouble(double value); 40 int32_t AppendDataBuffer(std::shared_ptr<MechDataBuffer> data); 41 42 int32_t ReadUint8(size_t offset, uint8_t& outValue); 43 int32_t ReadUint16(size_t offset, uint16_t& outValue); 44 int32_t ReadUint32(size_t offset, uint32_t& outValue); 45 int32_t ReadUint64(size_t offset, uint64_t& outValue); 46 int32_t ReadFloat(size_t offset, float& outValue); 47 int32_t ReadInt16(size_t offset, int16_t& outValue); 48 49 private: 50 static const uint32_t MECH_MAX_BUFFER_SIZE = 80 * 1024 * 1024; 51 52 size_t capacity_ = 0; 53 size_t rangeOffset_ = 0; 54 size_t rangeLength_ = 0; 55 uint8_t *data_ = nullptr; 56 }; 57 } // namespace MechBodyController 58 } // namespace OHOS 59 #endif // OHOS_MECH_DATA_BUFFER_H 60