8 files changed, 392 insertions, 0 deletions
diff --git a/src/common/conversion.cpp b/src/common/conversion.cpp
new file mode 100644
index 0000000..0bdc81a
--- /dev/null
+++ b/src/common/conversion.cpp
@@ -0,0 +1,39 @@
+#include "conversion.hpp"
+
+namespace common
+{
+
+common::UniquePtr<common::String> doubleToStr(double num, unsigned int width,
+											  unsigned int precision)
+{
+	auto str = common::make_unique<common::String>(width + precision);
+
+	dtostrf(num, static_cast<signed char>(width), static_cast<unsigned char>(precision),
+			str->c_str);
+
+	return str;
+}
+
+common::UniquePtr<common::String> intToStr(int num)
+{
+	auto width = static_cast<unsigned int>(log10(num));
+
+	auto str = common::make_unique<common::String>(width + 1U);
+
+	dtostrf(num, static_cast<signed char>(width + 1U), 0U, str->c_str);
+
+	return str;
+}
+
+common::UniquePtr<common::String> uintToStr(unsigned int num)
+{
+	auto width = static_cast<unsigned int>(log10(num));
+
+	auto str = common::make_unique<common::String>(width + 1U);
+
+	dtostrf(num, static_cast<signed char>(width + 1U), 0U, str->c_str);
+
+	return str;
+}
+
+} // namespace common
diff --git a/src/common/conversion.hpp b/src/common/conversion.hpp
new file mode 100644
index 0000000..81a4a52
--- /dev/null
+++ b/src/common/conversion.hpp
@@ -0,0 +1,36 @@
+#pragma once
+
+#include "common/memory.hpp"
+#include "common/string.hpp"
+
+namespace common
+{
+
+/**
+ * Converts a double number to a string.
+ *
+ * @param num A double number
+ * @param width The desired double width
+ * @param precision The desired double precision
+ * @returns The double as a string.
+ */
+common::UniquePtr<common::String> doubleToStr(double num, unsigned int width = 3,
+											  unsigned int precision = 2);
+
+/**
+ * Converts a integer to a string.
+ *
+ * @param num A number
+ * @returns The number as a string.
+ */
+common::UniquePtr<common::String> intToStr(int num);
+
+/**
+ * Converts a unsigned integer to a string.
+ *
+ * @param num A number
+ * @returns The number as a string.
+ */
+common::UniquePtr<common::String> uintToStr(unsigned int num);
+
+} // namespace common
diff --git a/src/common/memory.hpp b/src/common/memory.hpp
new file mode 100644
index 0000000..de72d80
--- /dev/null
+++ b/src/common/memory.hpp
@@ -0,0 +1,44 @@
+#pragma once
+
+#include <stddef.h>
+
+namespace common
+{
+
+template <typename memType>
+memType *malloc_s(unsigned int size);
+
+template <class Target>
+class UniquePtr
+{
+public:
+	explicit UniquePtr() = default;
+	explicit UniquePtr(Target *target);
+
+	// Move constructor
+	UniquePtr(UniquePtr &&unique_ptr) noexcept;
+
+	// Move assignment operator
+	UniquePtr &operator=(UniquePtr &&unique_ptr) noexcept;
+
+	// Disable the copy constructor
+	UniquePtr(const UniquePtr &unique_ptr) = delete;
+
+	// Disable the copy assignment operator
+	UniquePtr &operator=(const UniquePtr &unique_ptr) = delete;
+
+	~UniquePtr();
+
+	Target operator*() const;
+	Target *operator->() const;
+
+private:
+	Target *_target = nullptr;
+};
+
+template <typename Target, typename... Args>
+UniquePtr<Target> make_unique(Args... args);
+
+} // namespace common
+
+#include "memory.tpp"
diff --git a/src/common/memory.tpp b/src/common/memory.tpp
new file mode 100644
index 0000000..ace2432
--- /dev/null
+++ b/src/common/memory.tpp
@@ -0,0 +1,76 @@
+#pragma once
+
+#include "memory.hpp"
+
+#include "utils.hpp"
+
+#include <Arduino.h>
+#include <stdlib.h>
+
+namespace common
+{
+
+template <typename memType>
+memType *malloc_s(unsigned int size)
+{
+	auto *mem = malloc(size);
+
+	if (mem == nullptr)
+	{
+		Serial.println("Error: Memory allocation failed");
+		while (true) {}
+	}
+
+	return static_cast<memType *>(mem);
+}
+
+template <class Target>
+UniquePtr<Target>::UniquePtr(Target *target) : _target(target)
+{
+}
+
+template <class Target>
+UniquePtr<Target>::UniquePtr(UniquePtr &&unique_ptr) noexcept
+	: _target(unique_ptr._target)
+{
+	unique_ptr._target = nullptr;
+}
+
+template <class Target>
+UniquePtr<Target> &UniquePtr<Target>::operator=(UniquePtr &&unique_ptr) noexcept
+{
+	if (&unique_ptr != this)
+	{
+		delete _target;
+		_target = unique_ptr._target;
+		unique_ptr._target = nullptr;
+	}
+
+	return *this;
+}
+
+template <class Target>
+UniquePtr<Target>::~UniquePtr()
+{
+	delete _target;
+}
+
+template <class Target>
+Target UniquePtr<Target>::operator*() const
+{
+	return *(_target);
+}
+
+template <class Target>
+Target *UniquePtr<Target>::operator->() const
+{
+	return _target;
+}
+
+template <class Target, typename... Args>
+UniquePtr<Target> make_unique(Args... args)
+{
+	return UniquePtr<Target>(new Target(args...));
+}
+
+} // namespace common
diff --git a/src/common/string.cpp b/src/common/string.cpp
new file mode 100644
index 0000000..27b65d4
--- /dev/null
+++ b/src/common/string.cpp
@@ -0,0 +1,70 @@
+#include "string.hpp"
+
+#include "common/memory.hpp"
+
+#include <stdlib.h>
+
+namespace common
+{
+
+String::String(char *c_string) : c_str(c_string)
+{
+}
+
+String::String(unsigned int size) : c_str(malloc_s<char>(size + 1))
+{
+}
+
+String::String(const String &smart_str)
+	: c_str(malloc_s<char>(strlen(smart_str.c_str) + 1))
+{
+	memcpy(c_str, smart_str.c_str, strlen(smart_str.c_str) + 1);
+}
+
+String::String(String &&smart_str) noexcept : c_str(smart_str.c_str)
+{
+	smart_str.c_str = nullptr;
+}
+
+String &String::operator=(const String &smart_str)
+{
+	if (&smart_str != this)
+	{
+		free(c_str);
+		c_str = nullptr;
+
+		auto str_size = strlen(smart_str.c_str) + 1;
+
+		c_str = malloc_s<char>(str_size);
+		memcpy(c_str, smart_str.c_str, str_size);
+	}
+
+	return *this;
+}
+
+String &String::operator=(String &&smart_str) noexcept
+{
+	if (&smart_str != this)
+	{
+		free(c_str);
+		c_str = smart_str.c_str;
+		smart_str.c_str = nullptr;
+	}
+
+	return *this;
+}
+
+String::~String()
+{
+	if (c_str != nullptr)
+	{
+		free(c_str);
+	}
+}
+
+String::operator char *() const
+{
+	return c_str;
+}
+
+} // namespace common
diff --git a/src/common/string.hpp b/src/common/string.hpp
new file mode 100644
index 0000000..2641457
--- /dev/null
+++ b/src/common/string.hpp
@@ -0,0 +1,25 @@
+#pragma once
+
+namespace common
+{
+
+class String
+{
+public:
+	explicit String(char *c_str);
+	explicit String(unsigned int size);
+	String(const String &smart_str);
+	String(String &&smart_str) noexcept;
+
+	String &operator=(const String &smart_str);
+
+	String &operator=(String &&smart_str) noexcept;
+
+	~String();
+
+	explicit operator char *() const;
+
+	char *c_str = nullptr;
+};
+
+} // namespace common
diff --git a/src/common/time.cpp b/src/common/time.cpp
new file mode 100644
index 0000000..ee297d7
--- /dev/null
+++ b/src/common/time.cpp
@@ -0,0 +1,42 @@
+#include "time.hpp"
+
+#include <Arduino.h>
+
+namespace common
+{
+
+	Time::Time(uint64_t time_micros) : _time_micros(time_micros)
+	{
+	}
+
+	void Time::update()
+	{
+		_time_micros = micros();
+	}
+
+	Time Time::diff(Time prev_time) const
+	{
+		return Time(_time_micros - prev_time.microsecs());
+	}
+
+	double Time::secs() const
+	{
+		return static_cast<double>(_time_micros) * MICROS_TO_SECS;
+	}
+
+	double Time::millisecs() const
+	{
+		return static_cast<double>(_time_micros) * MICROS_TO_MILLIS;
+	}
+
+	uint64_t Time::microsecs() const
+	{
+		return _time_micros;
+	}
+
+	Time time_now()
+	{
+		return Time(micros());
+	}
+
+} // namespace common
diff --git a/src/common/time.hpp b/src/common/time.hpp
new file mode 100644
index 0000000..8efbd28
--- /dev/null
+++ b/src/common/time.hpp
@@ -0,0 +1,60 @@
+#pragma once
+
+#include <stdint.h>
+
+constexpr double MICROS_TO_SECS = 0.000001;
+constexpr double MICROS_TO_MILLIS = 0.001;
+
+namespace common
+{
+
+	/**
+	 * A representation of time.
+	 */
+	class Time
+	{
+	public:
+		/**
+		 * A representation of time.
+		 *
+		 * @param time_micros Time in microseconds
+		 */
+		explicit Time(uint64_t time_micros);
+
+		/**
+		 * Updates the time to the current time.
+		 */
+		void update();
+
+		/**
+		 * Returns the difference between two points in time.
+		 *
+		 * @param prev_time A previous point in time
+		 */
+		Time diff(Time prev_time) const;
+
+		/**
+		 * Returns the time in seconds.
+		 */
+		double secs() const;
+
+		/**
+		 * Returns the time in milliseconds.
+		 */
+		double millisecs() const;
+
+		/**
+		 * Returns the time in microseconds.
+		 */
+		uint64_t microsecs() const;
+
+	private:
+		uint64_t _time_micros;
+	};
+
+	/**
+	 * Returns a time object for the time since the program started.
+	 */
+	Time time_now();
+
+} // namespace common