Object_oriented_programming/Lab_3/myString.cpp

#define _CRT_SECURE_NO_WARNINGS
#include <string>
#include "myString.h"

// Îïðåäåëåíèå êîíñòðóêòîðà.
MyString::MyString(const char* Str)
{
	if (Str != nullptr)
	{
		m_pStr = new char[strlen(Str) + 1];
		strcpy_s(m_pStr, strlen(Str) + 1, Str);
	}
	else { m_pStr = nullptr; }
	
}

MyString::MyString(const char* Str, int size)
{
	if (Str != nullptr)
	{
	m_pStr = new char[size];
	strcpy_s(m_pStr, strlen(Str) + 1, Str);
	}
	else { m_pStr = nullptr; }
}

//ìåòîä , êîòîðûé îáåñïå÷èò äîñòóï ê õðàíÿùåéñÿ ñòðîêå
const char* MyString::GetString() const
{
	return m_pStr;
}

//êîíñòðóêòîð êîïèðîâàíèÿ
MyString::MyString(const MyString& Other)
{
	//îáà îáúåêòà ñóùåñòâóþò, îäèí è òîò-æå îáúåêò????
	//delete[] m_pStr; 
	m_pStr = new char[strlen(Other.m_pStr) + 1];
	strcpy_s(m_pStr, strlen(Other.m_pStr) + 1, Other.m_pStr);
}

//ïåðåìåùàþùèé êîíñòðóêòîð êîïèðîâàíèÿ
MyString::MyString(MyString&& Other)
{
	m_pStr = Other.m_pStr; //ïðîñòî çàáèðàåì äàííûå (ñèàìñêèå)
	Other.m_pStr = nullptr;//ãîâîðèì, ÷òî ó äðóãîãî íåò (òåïåðü âñå îòëè÷íî)
}

// Îïðåäåëåíèå äåñòðóêòîðà.
MyString::~MyString()
{
	//to_do m_pStr = new char [strlen(Str) + 1];
	delete[] m_pStr;
	m_pStr = nullptr;
}

//operator+
MyString MyString::operator+(const MyString& other) const
{
	MyString tmp_Str(m_pStr, strlen(m_pStr) + strlen(other.m_pStr) + 1);
	strcat(tmp_Str.m_pStr, other.m_pStr);
	
	return tmp_Str;//ïåðåìåùàþùèé êîíñòðóêòîð	
}

//îïåðàòîð ïðèñâàèâàíèÿ ïðèíèìàþùèé êëàññ
MyString& MyString::operator=(const MyString& Other)
{
	if (&Other != this)
	{
		delete[] m_pStr;//ìîæíî ëè îïòèìèçèðîâàòü?
		m_pStr = new char[strlen(Other.m_pStr) + 1];
		strcpy_s(m_pStr, strlen(Other.m_pStr) + 1, Other.m_pStr);
	}
	
	return *this;
}


//operator+=
MyString& MyString::operator+=(const MyString& other)
{
	if (&other != nullptr)
	{
		MyString tmp_Str(m_pStr, strlen(m_pStr) + strlen(other.m_pStr) + 1);
		strcat(tmp_Str.m_pStr, other.m_pStr);
		
		delete[] m_pStr;
		m_pStr = tmp_Str.m_pStr; //ïðîñòî çàáèðàåì äàííûå (ñèàìñêèå)
		tmp_Str.m_pStr = nullptr;
	}

	return *this;
}


//ïåðåìåùàþùèé îïåðàòîð ïðèñâàèâàíèÿ
void MyString::operator=(MyString&& Other)
{	

	delete[] m_pStr;

	m_pStr = Other.m_pStr; //ïðîñòî çàáèðàåì äàííûå (ñèàìñêèå)
	Other.m_pStr = nullptr;//ãîâîðèì, ÷òî ó äðóãîãî íåò (òåïåðü âñå îòëè÷íî)
}

MyString& MyString::operator=(const char* Str)
{	
	if (Str != nullptr)
	{
		if (strlen(m_pStr) != strlen(Str))
		{
			delete[] m_pStr;
			m_pStr = new char[strlen(Str) + 1];
		}

		strcpy_s(m_pStr, strlen(Str) + 1, Str);
	}

	return *this;
}

//ìåòîä, êîòîðûé áóäåò çàìåíÿòü ñòðîêó íà íîâóþ
void MyString::SetNewString(const char* Str)
{
	//if (strlen(m_pStr) >= strlen(Str)) {}; íóæíà ëè ïðîâåðêà???
	if (strcmp(m_pStr, Str))
	{
		if (strlen(m_pStr) != strlen(Str)) 
		{
			delete[] m_pStr;
			m_pStr = new char[strlen(Str) + 1];
		};
		
		strcpy_s(m_pStr, strlen(Str) + 1, Str);
	}	
}

std::ostream& operator<<(std::ostream& os, const MyString& str)
{
	os << /*"contents: \"" << */str.m_pStr /*<< "\"" << std::endl*/;
	return os;
}

MyString concatenation(const char* Str, ...)
{	
	size_t size = 1;

	for (const char** p = &Str; *(p) != nullptr; p++)
	{
		size +=strlen(*p);
	}
	
	char* tmp_Str = new char [size] {};

	for (const char** p = &Str; *(p) != nullptr; p++)
	{
		tmp_Str = strcat(tmp_Str, *p);		
	}
	
	MyString tmp (tmp_Str);
	delete[]tmp_Str;//áåç óòå÷êè ïàìÿòè

	return tmp;//ïåðåìåùàþùèé êîíñòðóêòîð
}