87 lines
3.7 KiB
C++
87 lines
3.7 KiB
C++
/*
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* Copyright 2020-2025 Ryan Powell <ryan@nable-embedded.io> and
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* esp-nimble-cpp, NimBLE-Arduino contributors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef NIMBLE_CPP_VALUE_ATTRIBUTE_H_
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#define NIMBLE_CPP_VALUE_ATTRIBUTE_H_
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#include "syscfg/syscfg.h"
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#if CONFIG_BT_NIMBLE_ENABLED && (MYNEWT_VAL(BLE_ROLE_PERIPHERAL) || MYNEWT_VAL(BLE_ROLE_CENTRAL))
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# include "NimBLEAttribute.h"
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# include "NimBLEAttValue.h"
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class NimBLEValueAttribute {
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public:
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NimBLEValueAttribute(uint16_t maxLen = BLE_ATT_ATTR_MAX_LEN, uint16_t initLen = MYNEWT_VAL(NIMBLE_CPP_ATT_VALUE_INIT_LENGTH))
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: m_value(initLen, maxLen) {}
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/**
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* @brief Get a copy of the value of the attribute value.
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* @param [in] timestamp (Optional) A pointer to a time_t struct to get the time the value set.
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* @return A copy of the attribute value.
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*/
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NimBLEAttValue getValue(time_t* timestamp) const { return m_value.getValue(timestamp); }
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/**
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* @brief Get a copy of the value of the attribute value.
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* @return A copy of the attribute value.
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*/
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NimBLEAttValue getValue() const { return m_value; }
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/**
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* @brief Get the length of the attribute value.
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* @return The length of the attribute value.
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*/
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size_t getLength() const { return m_value.size(); }
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/**
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* @brief Template to convert the data to <type\>.
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* @tparam T The type to convert the data to.
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* @param [in] timestamp (Optional) A pointer to a time_t struct to get the time the value set.
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* @param [in] skipSizeCheck (Optional) If true it will skip checking if the data size is less than <tt>sizeof(<type\>)</tt>.
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* @return The data converted to <type\> or NULL if skipSizeCheck is false and the data is less than <tt>sizeof(<type\>)</tt>.
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* @details <b>Use:</b> <tt>getValue<type>(×tamp, skipSizeCheck);</tt>
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* Used for types that are trivially copyable and convertible to NimBLEAttValue.
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*/
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template <typename T>
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typename std::enable_if<std::is_trivially_copyable<T>::value, T>::type
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getValue(time_t* timestamp = nullptr, bool skipSizeCheck = false) const {
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return m_value.getValue<T>(timestamp, skipSizeCheck);
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}
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/**
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* @brief Template to convert the data to <type\>.
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* @tparam T The type to convert the data to.
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* @param [in] timestamp (Optional) A pointer to a time_t struct to get the time the value set.
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* @param [in] skipSizeCheck (Optional) If true it will skip checking if the data size is less than <tt>sizeof(<type\>)</tt>.
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* @return The data converted to <type\> or NULL if skipSizeCheck is false and the data is less than <tt>sizeof(<type\>)</tt>.
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* @details <b>Use:</b> <tt>getValue<type>(×tamp, skipSizeCheck);</tt>
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* Used for types that are not trivially copyable and convertible to NimBLEAttValue via it's operators.
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*/
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template <typename T>
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typename std::enable_if<!std::is_trivially_copyable<T>::value && std::is_convertible<T, NimBLEAttValue>::value, T>::type
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getValue(time_t* timestamp = nullptr, bool skipSizeCheck = false) const {
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return m_value;
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}
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protected:
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NimBLEAttValue m_value{};
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};
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#endif // CONFIG_BT_NIMBLE_ENABLED && (MYNEWT_VAL(BLE_ROLE_PERIPHERAL) || MYNEWT_VAL(BLE_ROLE_CENTRAL))
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#endif // NIMBLE_CPP_ATTRIBUTE_H_
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