added copy constructor

Author: vinitjames

circular_buffer.h

@@ -6,6 +6,7 @@
 #include <memory>
 #include <iterator>
 #include <type_traits>
+#include <algorithm>
 
 template<typename T>
 class CircularBuffer {
@@ -28,6 +29,20 @@ class CircularBuffer {
 	explicit CircularBuffer(size_t size)
 		:_buff{std::unique_ptr<T[]>(new T[size])}, _max_size{size}{}
 
+	CircularBuffer(const CircularBuffer& other)
+		:_buff{std::unique_ptr<T[]>(new T[other.capacity()])},
+		 _max_size{other.capacity()}{
+			 
+			 std::copy(other.data(), other.data() + _max_size, _buff.get());
+		 }
+
+	CircularBuffer& operator=(const CircularBuffer& other){
+		_buff = std::unique_ptr<T[]>(new T[other.capacity()]);
+		_max_size = other.capacity();
+		std::copy(other.data(), other.data() + _max_size, _buff.get());
+		return *this;
+	}
+
 	void push_back(const value_type& data);
 	void pop_front();
 	reference front();
@@ -40,6 +55,7 @@ class CircularBuffer {
 	size_type capacity() const ;
 	size_type size() const;
 	size_type buffer_size() const {return sizeof(T)*_max_size;};
+	const_pointer data() const { return _buff.get(); }
 
 	const_reference operator[](size_type index) const;
 	reference operator[](size_type index);
@@ -56,6 +72,7 @@ class CircularBuffer {
 	void _decrement_bufferstate();
 	mutable std::mutex _mtx;
 	std::unique_ptr<T[]> _buff;
+
 	size_type _head = 0;
 	size_type _tail = 0;
 	size_type _size = 0;

samples/sample_circularbuffer.cpp

@@ -13,7 +13,8 @@ struct test_struct{
 	test_struct(){
 		bytes = (char*)malloc(100);
 		std::cout<<"constructing test_struct: "<<count++<<"\n";
-		}
+	}
+	
 	test_struct(const test_struct& other){
 		bytes = (char*)malloc(100);
 		memcpy(bytes, other.bytes,100);
@@ -28,12 +29,11 @@ struct test_struct{
 	}
 
 	~test_struct(){
-		std::cout<<"destructing test_struct"<<--count<<"\n";
 		free(bytes);
 	}
 
 	friend std::ostream& operator<<(std::ostream& os, const test_struct& ts){
-		return os<<"test\n";
+		return os<<"\ntest";
 	}
 
 
@@ -121,6 +121,12 @@ int main(int argc, char *argv[])
 
 	test_structbuf.pop_front();
 
+	CircularBuffer<std::string> test_stringbufcopy{test_stringbuf};
+	std::cout<<"Checking  maxsize of copy buffer"<<test_stringbufcopy.capacity()<<"\n";
+	std::cout<<"Checking  size of copy buffer"<<test_stringbufcopy.size()<<"\n";
+	std::cout<<"Checking  [] in copybuffer"<<test_stringbufcopy[1]<<"\n";
+	std::cout<<"Checking maxsize buffer"<<test_structbuf.capacity()<<"\n";
+	std::cout<<"Checking size buffer"<<test_structbuf.size()<<"\n";
 
 	return 0;
 }