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Plugins/MqttClient/Source/DTMqtt/MqttCPP/message.cpp

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+// Copyright 2023 Dexter.Wan. All Rights Reserved. 
+// EMail: 45141961@qq.com
+
+#include "message.h"
+#include <cstring>
+#include <utility>
+
+namespace mqtt {
+
+/////////////////////////////////////////////////////////////////////////////
+
+#if __cplusplus < 201703L
+	constexpr int message::DFLT_QOS;
+	constexpr bool message::DFLT_RETAINED;
+#endif
+
+const MQTTAsync_message message::DFLT_C_STRUCT = MQTTAsync_message_initializer;
+
+// --------------------------------------------------------------------------
+
+message::message() : msg_(DFLT_C_STRUCT)
+{
+}
+
+message::message(string_ref topic, const void* payload, size_t len, int qos, bool retained,
+				 const properties& props /*=properties()*/)
+		: msg_(DFLT_C_STRUCT), topic_(std::move(topic))
+{
+	set_payload(payload, len);
+	set_qos(qos);
+	set_retained(retained);
+	set_properties(props);
+}
+
+message::message(string_ref topic, binary_ref payload, int qos, bool retained,
+				 const properties& props /*=properties()*/)
+		: msg_(DFLT_C_STRUCT), topic_(std::move(topic))
+{
+	set_payload(std::move(payload));
+	set_qos(qos);
+	set_retained(retained);
+	set_properties(props);
+}
+
+message::message(string_ref topic, const MQTTAsync_message& cmsg)
+		: msg_(cmsg), topic_(std::move(topic)), props_(cmsg.properties)
+{
+	set_payload(cmsg.payload, cmsg.payloadlen);
+	msg_.properties = props_.c_struct();
+}
+
+message::message(const message& other)
+		: msg_(other.msg_), topic_(other.topic_), props_(other.props_)
+{
+	set_payload(other.payload_);
+	msg_.properties = props_.c_struct();
+}
+
+message::message(message&& other)
+		: msg_(other.msg_), topic_(std::move(other.topic_)),
+			props_(std::move(other.props_))
+{
+	set_payload(std::move(other.payload_));
+	other.msg_.payloadlen = 0;
+	other.msg_.payload = nullptr;
+	msg_.properties = props_.c_struct();
+}
+
+message& message::operator=(const message& rhs)
+{
+	if (&rhs != this) {
+		msg_ = rhs.msg_;
+		topic_ = rhs.topic_;
+		set_payload(rhs.payload_);
+		set_properties(rhs.props_);
+	}
+	return *this;
+}
+
+message& message::operator=(message&& rhs)
+{
+	if (&rhs != this) {
+		msg_ = rhs.msg_;
+		topic_ = std::move(rhs.topic_);
+		set_payload(std::move(rhs.payload_));
+		set_properties(std::move(rhs.props_));
+
+		rhs.msg_ = DFLT_C_STRUCT;
+	}
+	return *this;
+}
+
+void message::clear_payload()
+{
+	payload_.reset();
+	msg_.payload = nullptr;
+	msg_.payloadlen = 0;
+}
+
+void message::set_payload(binary_ref payload)
+{
+	payload_ = std::move(payload);
+
+	if (payload_.empty()) {
+		msg_.payload = nullptr;
+		msg_.payloadlen = 0;
+	}
+	else {
+		msg_.payload = const_cast<binary_ref::value_type*>(payload_.data());
+		msg_.payloadlen = int(payload_.length());
+	}
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// end namespace mqtt
+}
+