Overall codebase refactor

.gitignore

@@ -1,6 +1,7 @@
 bin/
 *.dis
 *.o
+*.dylib
 .kdev4/
 .vscode/
 CMakeFiles/

CMakeLists.txt

@@ -6,23 +6,6 @@ set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
 
 add_subdirectory(src)
-add_executable(cpplab main.cpp)
+#add_executable(c_time time.cpp)
 
-add_executable(
-    sse 
-    src/core/cpu/sse.cpp
-    src/core/cpu/naive.cpp
-    src/core/cpu/avx2.cpp
-    src/core/bmath/complex.cpp
-    sse.cpp
-)
-
-add_executable(
-    complex 
-    src/core/bmath/complex.cpp
-    complex.cpp
-)
-
-add_executable(c_time time.cpp)
-
-install(TARGETS cpplab RUNTIME DESTINATION bin)
+#install(TARGETS cpplab RUNTIME DESTINATION bin)

complex.cpp

@@ -1,20 +0,0 @@
-#include <iostream>
-#include <string>
-#include <iomanip>
-#include <sys/time.h>
-
-#include "src/core/bmath/complex.hpp"
-
-using namespace Core::Bmath;
-using namespace std;
-
-int main(int argc, char** argcv){
-    Complex c1(1,1);
-    Complex c2(2,2);
-    Complex c3=c1*c2;
-    Complex c4=c1+c2;
-
-    cout << c1 << "*" << c2 << "=" << c3 << endl;
-    cout << c1 << "+" << c2 << "=" << c4 << endl;
-    
-}

main.cpp

@@ -1,43 +0,0 @@
-#include <iostream>
-#include "src/core/blist.hpp"
-#include "src/core/cpu/avx2.hpp"
-#include <string>
-#include <iomanip>
-
-using namespace Core::Cpu;
-
-
-int main(int argc, char **argv) {
-
-
-    blist<int> list = blist<int>();
-    std::cout << "List size: " << list.getSize() <<std::endl;
-    list.add(1);
-    list.add(2);
-    std::cout << "List size: " << list.getSize() << std::endl;
-    std::cout << "Current value: " << list.current()->value << std::endl;
-    
-    int *values = list.values();
-    for(int i=0;i<list.getSize();i++){
-      std::cout << "Value: " << values[i] << std::endl;
-    }
-    
-    
-    //node<int> n = node<int>(2);
-    
-    //std::cout << "Hello node: " << ni->value << endl;
-    
-    /*
-    std::cout << "Hello node: " << ni->value << endl;
-    std::cout << "Hello, world!" << std::endl;
-    std::cout << "Hello Blist: " << "Hello" << std::endl;
-    
-    //Template structs
-    struct node<std::string> stringNode;
-    stringNode.value = std::string("Hello Master");
-    
-    std::cout << stringNode.value << std::endl;
-    */
-    
-    return 0;
-}

src/CMakeLists.txt

@@ -1,3 +1,5 @@
-add_subdirectory(core)
+add_subdirectory(bmath)
+add_subdirectory(cpu)
+add_subdirectory(dtstruct)
 add_subdirectory(opengl)
 add_subdirectory(misc)

src/bmath/CMakeLists.txt

@@ -0,0 +1,10 @@
+add_library(
+  bmath SHARED
+  complex.cpp
+)
+
+add_executable(
+  complex
+  demos/complex.cpp
+  complex.cpp
+)

src/bmath/complex.cpp

@@ -0,0 +1,48 @@
+#include "complex.hpp"
+
+/** 
+ * Constructor implementation
+ */
+BMath::Complex::Complex(Double real, Double imaginary)
+{
+    this->real = real;
+    this->imaginary = imaginary;
+};
+
+BMath::Complex::Complex(const Complex &other)
+{
+    this->real = other.real;
+    this->imaginary = other.imaginary;
+}
+
+/**
+ * Add complex number
+ */
+BMath::Complex &BMath::Complex::operator+=(const Complex &rightOp)
+{
+    this->real += rightOp.real;
+    this->imaginary += rightOp.imaginary;
+    return *this;
+};
+
+BMath::Complex BMath::Complex::operator-(const Complex &rightOp)
+{
+    return Complex(
+        this->real-rightOp.real,
+        this->imaginary-rightOp.imaginary
+    );
+};
+
+BMath::Complex BMath::Complex::operator+(const Complex &rightOp)
+{
+    return Complex(
+        this->real + rightOp.real,
+        this->imaginary + rightOp.imaginary);
+};
+
+BMath::Complex BMath::Complex::operator*(const Complex &rigthOp)
+{
+    return Complex(
+        this->real * rigthOp.real - this->imaginary * rigthOp.imaginary,
+        this->imaginary * rigthOp.real + this->real * rigthOp.imaginary);
+};

src/bmath/complex.hpp

@@ -0,0 +1,29 @@
+#pragma once
+
+#include "../cpu/types.hpp"
+#include <iostream>
+
+using namespace std;
+namespace BMath
+{
+class Complex
+{
+private:
+    Double real;
+    Double imaginary;
+
+public:
+    Complex(Double real, Double imaginary);
+    Complex(const Complex &other);
+    Complex &operator+=(const Complex &rightOp);
+    Complex operator+(const Complex &rightOp);
+    Complex operator-(const Complex &rigthOp);
+    Complex operator*(const Complex &rightOp);
+
+    //Overload to enable toString operations
+    friend std::ostream &operator<<(std::ostream &stream, BMath::Complex const &c)
+    {
+        return stream << "(" << c.real << "+" << c.imaginary << "i)";
+    }
+};
+}; // namespace Bmath

src/bmath/demos/complex.cpp

@@ -0,0 +1,12 @@
+#include <iostream>
+#include "../complex.hpp"
+
+using BMath::Complex;
+
+int main(void)
+{
+  std::cout << "Complex numbers " << std::endl;
+  Complex c1(1,1);
+  Complex c2(2,2);
+  std::cout << c1 << c2 << c2-c1 << c2+c1 <<std::endl;
+}

src/core/CMakeLists.txt

@@ -1,2 +0,0 @@
-add_subdirectory(bmath)
-add_subdirectory(cpu)

src/core/blist.hpp

@@ -1,111 +0,0 @@
-/*
- * Copyright 2017 Vitor Fernandes <email>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-#ifndef BLIST_H
-#define BLIST_H
-
-#include <string>
-#include <cstddef>
-#include <iostream>
-
-template <typename T>
-class blist
-{ 
-public:
-    
-  typedef struct node{
-      node(T v,node* p,node* n){
-	value = v;
-	next  = n;
-	previous = p;
-      }
-      node(T v){
-	value=v;
-	next=NULL;
-	previous=NULL;
-      }
-      T value;
-      node* next;
-      node* previous;
-    } Node;
-
-    blist(){
-      this->rootNode = NULL;
-      this->currentNode=this->rootNode;
-      size = 0;
-    };
-    blist(T value){
-      this->rootNode=new Node(value,NULL,NULL);
-      this->currentNode=this->rootNode;
-      size = 1;
-    };
-    blist(const blist<T>& other){
-      this->rootNode = other.root();
-    };
-    void add(T value){
-      if(this->rootNode==NULL){
-	this->rootNode=new Node(value,NULL,NULL);
-	this->currentNode=rootNode;
-      }else{
-	Node* newNode = new Node(value,currentNode,NULL);
-	this->currentNode->next = newNode;
-	currentNode=newNode;
-      }
-      size++;
-    };
-    ~blist(){
-      std::cout << "Destructing list" << std::endl;
-      Node *aux;
-      while(this->currentNode!=this->rootNode){
-	aux = this->currentNode;
-	this->currentNode = this->currentNode->previous;
-	delete aux;
-      }
-      delete this->rootNode;
-    };
-    blist<T>& operator=(const blist& other){
-      this->rootNode = other.root();
-    };
-    bool operator==(const blist& other){
-      this->rootNode==other.root();
-    };
-    Node * root() const {
-      return this->rootNode;
-    };
-    Node * current() const {
-      return this->currentNode;
-    };
-    
-    T* values() {
-      T *aux = new T[size];
-      Node *naux = this->rootNode;
-      for(int i=0;i<size;i++){
-	aux[i]=naux->value;
-	naux=naux->next;
-      }
-      return aux;
-    };
-    int getSize(){
-      return size;
-    };
-private:
-    Node * rootNode;
-    Node * currentNode;
-    int size;
-};
-
-#endif // BLIST_H

src/core/bmath/complex.cpp

@@ -1,32 +0,0 @@
-#include "complex.hpp"
-
-/** 
- * Constructor implementation
- */ 
-Core::Bmath::Complex::Complex(Double real,Double imaginary){
-    this->real=real;
-    this->imaginary=imaginary;
-};
-
-/**
- * Add complex number
- */
-Core::Bmath::Complex& Core::Bmath::Complex::operator+= (const Complex& rightOp){
-    this->real+=rightOp.real;
-    this->imaginary+=rightOp.imaginary;
-    return *this;
-};
-
-Core::Bmath::Complex Core::Bmath::Complex::operator+ (const Complex& rightOp){
-    return Complex(
-        this->real+rightOp.real,
-        this->imaginary+rightOp.imaginary
-    );
-};
-
-Core::Bmath::Complex Core::Bmath::Complex::operator* (const Complex& rigthOp){
-    return Complex(
-        this->real*rigthOp.real-this->imaginary*rigthOp.imaginary,
-        this->imaginary*rigthOp.real+this->real*rigthOp.imaginary
-    );
-};

src/core/bmath/complex.hpp

@@ -1,30 +0,0 @@
-#ifndef CORE_BMATH_COMPLEX
-#define CORE_BMATH_COMPLEX
-
-#include "../cpu/types.hpp"
-#include <iostream>
-
-using namespace std;
-
-namespace Core{
-    namespace Bmath{
-        class Complex{
-            private:
-                Double real;
-                Double imaginary;
-            
-            public:
-                Complex(Double real,Double imaginary);
-                Complex& operator+=(const Complex& rightOp);
-                Complex operator+(const Complex &rightOp);
-                Complex operator*(const Complex &rightOp);
-                
-                //Overload to enable toString operations
-                friend std::ostream& operator<<(std::ostream &stream, Core::Bmath::Complex const &c){
-                    return stream << "(" << c.real << "+" << c.imaginary << "i)";
-                }
-        };
-    };
-};
-
-#endif

src/core/cpu/avx2.cpp

@@ -1,17 +0,0 @@
-#include "avx2.hpp"
-#include <iostream>
-#include <string>
-
-
-void Core::Cpu::avx2::avx_sum(int *a,int *b){
-
-}
-
-void Core::Cpu::avx2::printAVX2Num(int *num){
-    for(int i=0;i<avx2::AVX2_INT_SIZE;i++){
-        cout << i;
-        if(i<avx2::AVX2_INT_SIZE-1){
-            cout << ",";
-        }
-    }
-}

src/core/cpu/avx2.hpp

@@ -1,18 +0,0 @@
-#ifndef AVX2_H
-#define AVX2_H
-
-using namespace std;
-/**
- * This will define a set of functions 
- */
-namespace Core {
-    namespace Cpu {
-        class avx2 {
-            public:
-                static int const AVX2_INT_SIZE=16;
-                static void avx_sum(int* a, int* b);
-                static void printAVX2Num(int* num);
-        };
-    };
-};
-#endif

src/core/cpu/naive.hpp

@@ -1,20 +0,0 @@
-#ifndef CORE_CPU_NAIVE_H
-#define CORE_CPU_NAIVE_H
-
-#include "types.hpp"
-
-using namespace std;
-/**
- * This will define a set of functions 
- */
-namespace Core {
-    namespace Cpu {
-        class Naive {
-            public:
-                //Methods
-                static void sum_128_long(UInt* a, UInt* b);
-        };
-    };
-};
-
-#endif

src/core/cpu/sse.hpp

@@ -1,20 +0,0 @@
-#ifndef CORE_CPU_SSE_H
-#define CORE_CPU_SSE_H
-
-#include "types.hpp"
-
-using namespace std;
-/**
- * This will define a set of functions 
- */
-namespace Core {
-    namespace Cpu {
-        class SSE {
-            public:
-                static void paddw(UInt *a,UInt *b);
-                static void paddd(ULong *a,ULong *b);
-        };
-    };
-};
-
-#endif

src/core/cpu/types.hpp

@@ -1,25 +0,0 @@
-#ifndef CORE_CPU_TYPES_H
-#define CORE_CPU_TYPES_H
-
-    /*
-    * Types for x86 architectures
-    */
-    #if defined(__x86_64__)
-        //Signed type alias
-        typedef int Int;
-        typedef int Int;
-        typedef long Long;
-        typedef char Char;
-        typedef short Short;
-
-        //IEEE floating point alias
-        typedef float Float;
-        typedef double Double;
-
-        //Unsigned type alias
-        typedef unsigned char UChar;
-        typedef unsigned short UShort;
-        typedef unsigned int UInt;
-        typedef unsigned long ULong;
-    #endif
-#endif

src/core/cpu/utils.hpp

@@ -1,71 +0,0 @@
-#ifndef CORE_CPU_UTILS_H
-#define CORE_CPU_UTILS_H
-
-#include <iostream>
-#include "types.hpp"
-
-
-namespace Core {
-    namespace Cpu {
-        class Utils {
-            public:
-                //Lengths
-                static const UChar INT_LEN_64   =   2;
-                static const UChar INT_LEN_128  =   4;
-                static const UChar INT_LEN_256  =   8;
-                static const UChar INT_LEN_512  =   16;
-
-                static const UChar LONG_LEN_64  =   1;
-                static const UChar LONG_LEN_128  =   2;
-                static const UChar LONG_LEN_256  =   4;
-                static const UChar LONG_LEN_512  =   8;
-                
-                //Masks
-                static const UInt MASK_32=0xFFFFFFFF;
-                static const UInt MASK_16=0xFFFF;
-                static const UInt MASK_8=0xFF;
-
-                //Shifts
-                static const UChar SHIFT_32 = 32;
-                static const UChar SHIFT_16 = 16;
-                static const UChar SHIFT_8  = 8;
-
-                /**
-                 * Template function (generics) to enable the printing of several datatypes
-                 */
-                template<typename Number>
-                static void printHex(Number *num,Int len) {
-                    for(int i=0;i<len;i++){
-                        cout << hex << num[i] ;
-                        if(i<len-1){
-                            cout << ",";
-                        }
-                    }
-                    cout << std::dec << endl;
-                };
-
-                /**
-                 * Utility method to convert a packaged 128bit int to 128bit long
-                 */
-                static void int128BitToLong(UInt *packedUInteger,ULong *packedULong){
-                    packedULong[0] = (ULong)packedUInteger[1]<<32 | packedUInteger[0];
-                    packedULong[1] = (ULong)packedUInteger[3]<<32 | packedUInteger[2];
-                };
-
-                /**
-                 * Utility method to convert a packed 128bit long into a 128 int 
-                 */
-                static void long128BitToInt(ULong *packedULong, UInt *packedUInteger){
-                    //Unpack first long
-                    packedUInteger[0] = packedULong[0] && MASK_32;
-                    packedUInteger[1] = packedULong[0] >> SHIFT_32;
-
-                    //Unpack second long
-                    packedUInteger[2] = packedULong[1] && MASK_32;
-                    packedUInteger[3] = packedULong[1] >> SHIFT_32;
-                };
-        };
-    };
-};
-
-#endif

src/cpu/CMakeLists.txt

@@ -0,0 +1,7 @@
+add_executable(
+    sse 
+    demos/sse.cpp
+    sse.cpp
+    naive.cpp
+    avx2.cpp
+)

src/cpu/avx2.cpp

@@ -0,0 +1,19 @@
+#include "avx2.hpp"
+#include <iostream>
+#include <string>
+
+void Cpu::avx2::avx_sum(int *a, int *b)
+{
+}
+
+void Cpu::avx2::printAVX2Num(int *num)
+{
+    for (int i = 0; i < avx2::AVX2_INT_SIZE; i++)
+    {
+        cout << i;
+        if (i < avx2::AVX2_INT_SIZE - 1)
+        {
+            cout << ",";
+        }
+    }
+}

src/cpu/avx2.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+using namespace std;
+namespace Cpu
+{
+class avx2
+{
+public:
+    static int const AVX2_INT_SIZE = 16;
+    static void avx_sum(int *a, int *b);
+    static void printAVX2Num(int *num);
+};
+};

src/cpu/demos/sse.cpp

@@ -0,0 +1,63 @@
+#include <iostream>
+#include "../utils.hpp"
+#include "../sse.hpp"
+#include "../naive.hpp"
+#include <sys/time.h>
+
+using namespace Cpu;
+using namespace std;
+
+long int gettime(){
+    struct timeval tp;
+    gettimeofday(&tp, NULL);
+    long int ms = tp.tv_sec * 1000 + tp.tv_usec / 1000;
+    return ms;
+};
+
+#define MAX_ITER 1000*1000*100
+
+int main(int argc, char** argcv){
+    UInt v1_128[INT_LEN_128] = { 0x1, 0x2,0x3,0x4 };
+    UInt v2_128[INT_LEN_128] = { 0x1, 0x2,0x3,0x4 };
+
+    ULong v1_128_l[LONG_LEN_128];
+    ULong v2_128_l[LONG_LEN_128];
+
+    Utils::int128BitToLong(v1_128,v1_128_l);
+    Utils::int128BitToLong(v2_128,v2_128_l);
+
+    SSE::paddw(v1_128,v2_128);
+
+    long int start,end;
+
+    Utils::printHex(v1_128,INT_LEN_128);
+    Utils::printHex(v2_128,INT_LEN_128);
+
+    Utils::printHex(v1_128_l,LONG_LEN_128);
+    Utils::printHex(v2_128_l,LONG_LEN_128);
+
+    start = gettime();
+    for(int i=0;i<MAX_ITER;i++){
+        Naive::sum_128_long(v1_128,v2_128);
+    }
+    end = gettime();
+    cout << "Naive Approach: " << end-start << endl;
+
+    start = gettime();
+    for(int i=0;i<MAX_ITER;i++){
+        SSE::paddw(v1_128,v2_128);
+    }
+    end = gettime();
+    cout << "SSE Approach paddw: " << end-start << endl;
+
+    start = gettime();
+    for(int i=0;i<MAX_ITER;i++){
+        SSE::paddd(v1_128_l,v2_128_l);
+    }
+    end = gettime();
+    cout << "SSE Approach paddd: " << end-start << endl;
+
+    Utils::printHex(v1_128,INT_LEN_128);
+    Utils::printHex(v1_128_l,LONG_LEN_128);
+
+}

src/cpu/naive.cpp

@@ -2,7 +2,7 @@
 #include "types.hpp"
 #include <iostream>
 
-void Core::Cpu::Naive::sum_128_long(UInt *a,UInt *b){
+void Cpu::Naive::sum_128_long(UInt *a,UInt *b){
     ULong a1 = ((ULong)a[0] << 32) | a[1];
     ULong a2 = ((ULong)a[2] << 32) | a[3];
     ULong b1 = ((ULong)b[0] << 32) | b[1];

src/cpu/naive.hpp

@@ -0,0 +1,17 @@
+#pragma once
+
+#include "types.hpp"
+
+using namespace std;
+/**
+ * This will define a set of functions 
+ */
+namespace Cpu
+{
+class Naive
+{
+public:
+    //Methods
+    static void sum_128_long(UInt *a, UInt *b);
+};
+};

src/cpu/sse.cpp

@@ -2,7 +2,7 @@
 #include <iostream>
 
 //X86 Assembly to add two 128 bit numbers in the form of packed integers 32bit
-void Core::Cpu::SSE::paddw(UInt *a,UInt *b) {
+void Cpu::SSE::paddw(UInt *a,UInt *b) {
     asm(
         "movdqa %0, %%xmm1\n"
         "paddw %1, %%xmm1\n"
@@ -14,7 +14,7 @@ void Core::Cpu::SSE::paddw(UInt *a,UInt *b) {
 
 
 //X86 Assembly to add two 128 bit numbers in the form of packed long 64bit
-void Core::Cpu::SSE::paddd(ULong *a,ULong *b) {
+void Cpu::SSE::paddd(ULong *a,ULong *b) {
     asm(
         "movdqa %0, %%xmm1\n"
         "paddd %1, %%xmm1\n"

src/cpu/sse.hpp

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "types.hpp"
+
+using namespace std;
+
+
+namespace Cpu
+{
+class SSE
+{
+public:
+    static void paddw(UInt *a, UInt *b);
+    static void paddd(ULong *a, ULong *b);
+};
+};

src/cpu/types.hpp

@@ -0,0 +1,42 @@
+#pragma once
+/*
+    * Types for x86 architectures
+    */
+#if defined(__x86_64__)
+    //Signed type alias
+    typedef int Int;
+    typedef long Long;
+    typedef char Char;
+    typedef short Short;
+
+    //IEEE floating point alias
+    typedef float Float;
+    typedef double Double;
+
+    //Unsigned type alias
+    typedef unsigned char UChar;
+    typedef unsigned short UShort;
+    typedef unsigned int UInt;
+    typedef unsigned long ULong;
+
+    //SSE DataTypes
+    #define INT_LEN_64 2
+    #define INT_LEN_128 4
+    #define INT_LEN_256 8
+    #define INT_LEN_512 16
+
+    #define LONG_LEN_64 1
+    #define LONG_LEN_128 2
+    #define LONG_LEN_256 4
+    #define LONG_LEN_512 8
+
+    //Masks
+    #define MASK_32 0xFFFFFFFF
+    #define MASK_16 0xFFFF
+    #define MASK_8 0xFF
+
+    //Shifts
+    #define SHIFT_32 32
+    #define SHIFT_16 16
+    #define SHIFT_8 8
+#endif

src/cpu/utils.hpp

@@ -0,0 +1,50 @@
+#pragma once
+
+#include <iostream>
+#include "types.hpp"
+
+using namespace std;
+
+namespace Cpu
+{
+class Utils
+{
+public:
+    template <typename Number>
+    static void printHex(Number *num, Int len)
+    {
+        for (int i = 0; i < len; i++)
+        {
+            cout << hex << num[i];
+            if (i < len - 1)
+            {
+                cout << ",";
+            }
+        }
+        cout << std::dec << endl;
+    };
+
+    /**
+                 * Utility method to convert a packaged 128bit int to 128bit long
+                 */
+    static void int128BitToLong(UInt *packedUInteger, ULong *packedULong)
+    {
+        packedULong[0] = (ULong)packedUInteger[1] << 32 | packedUInteger[0];
+        packedULong[1] = (ULong)packedUInteger[3] << 32 | packedUInteger[2];
+    };
+
+    /**
+                 * Utility method to convert a packed 128bit long into a 128 int 
+                 */
+    static void long128BitToInt(ULong *packedULong, UInt *packedUInteger)
+    {
+        //Unpack first long
+        packedUInteger[0] = packedULong[0] && MASK_32;
+        packedUInteger[1] = packedULong[0] >> SHIFT_32;
+
+        //Unpack second long
+        packedUInteger[2] = packedULong[1] && MASK_32;
+        packedUInteger[3] = packedULong[1] >> SHIFT_32;
+    };
+};
+}; // namespace Cpu

src/dtstruct/blist.hpp

@@ -0,0 +1,126 @@
+/*
+ * Copyright 2017 Vitor Fernandes <email>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+#pragma once
+
+#include <string>
+#include <cstddef>
+#include <iostream>
+
+template <typename T>
+class blist
+{
+public:
+  typedef struct node
+  {
+    node(T v, node *p, node *n)
+    {
+      value = v;
+      next = n;
+      previous = p;
+    }
+    node(T v)
+    {
+      value = v;
+      next = NULL;
+      previous = NULL;
+    }
+    T value;
+    node *next;
+    node *previous;
+  } Node;
+
+  blist()
+  {
+    this->rootNode = NULL;
+    this->currentNode = this->rootNode;
+    size = 0;
+  };
+  blist(T value)
+  {
+    this->rootNode = new Node(value, NULL, NULL);
+    this->currentNode = this->rootNode;
+    size = 1;
+  };
+  blist(const blist<T> &other)
+  {
+    this->rootNode = other.root();
+  };
+  void add(T value)
+  {
+    if (this->rootNode == NULL)
+    {
+      this->rootNode = new Node(value, NULL, NULL);
+      this->currentNode = rootNode;
+    }
+    else
+    {
+      Node *newNode = new Node(value, currentNode, NULL);
+      this->currentNode->next = newNode;
+      currentNode = newNode;
+    }
+    size++;
+  };
+  ~blist()
+  {
+    std::cout << "Destructing list" << std::endl;
+    Node *aux;
+    while (this->currentNode != this->rootNode)
+    {
+      aux = this->currentNode;
+      this->currentNode = this->currentNode->previous;
+      delete aux;
+    }
+    delete this->rootNode;
+  };
+  blist<T> &operator=(const blist &other)
+  {
+    this->rootNode = other.root();
+  };
+  bool operator==(const blist &other)
+  {
+    this->rootNode == other.root();
+  };
+  Node *root() const
+  {
+    return this->rootNode;
+  };
+  Node *current() const
+  {
+    return this->currentNode;
+  };
+
+  T *values()
+  {
+    T *aux = new T[size];
+    Node *naux = this->rootNode;
+    for (int i = 0; i < size; i++)
+    {
+      aux[i] = naux->value;
+      naux = naux->next;
+    }
+    return aux;
+  };
+  int getSize()
+  {
+    return size;
+  };
+
+private:
+  Node *rootNode;
+  Node *currentNode;
+  int size;
+};