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#include "MyString.h"
#include <cstring>
#include <iostream>
#include <iomanip>
void MyString::copyFrom(const MyString& other)
{
str = new char[strlen(other.str) + 1];
strcpy(str, other.str);
size = other.size;
}
void MyString::free()
{
delete[] str;
}
MyString::MyString(const char* data)
{
if(data == nullptr)
{
str = new char[1];
str[0] = '\0';
size = 0;
}
else
{
size = strlen(data);
str = new char[size + 1];
strcpy(str, data);
}
}
size_t getNumSize(size_t num)
{
size_t res = 0;
while (num)
{
res++;
num /= 10;
}
return res;
}
MyString::MyString(size_t n)
{
int numSize = getNumSize(n);
str = new char[numSize + 1];
str[numSize] = '\0';
for (size_t i = 0; i < numSize; i++, n /= 10)
str[numSize - 1 - i] = (n % 10) + '0';
size = numSize;
}
MyString::MyString()
{
str = new char[1];
str[0] = '\0';
size = 0;
}
MyString::MyString(const MyString& other)
{
copyFrom(other);
}
MyString& MyString::operator=(const MyString& other)
{
if (this != &other)
{
free();
copyFrom(other);
}
return *this;
}
MyString::~MyString()
{
free();
}
size_t MyString::getSize() const
{
return size;
}
void MyString::concatFrom(const MyString& other)
{
char* temp = new char[getSize() + other.getSize() + 1];
strcpy(temp, str);
strcat(temp, other.str);
delete[] str;
str = temp;
size = size + other.getSize();
}
const char* MyString::c_str() const
{
return str;
}
MyString& MyString::operator+=(const MyString& other)
{
concatFrom(other);
return *this;
}
MyString operator+(const MyString& lhs, const MyString& rhs)
{
MyString copyOfLeft(lhs);
copyOfLeft += rhs;
return copyOfLeft;
}
std::ostream& operator<<(std::ostream& stream, const MyString& str)
{
stream << str.str;
return stream;
}
std::istream& operator>>(std::istream& stream, MyString& str)
{
delete[] str.str;
char buff[1024];
stream >> std::setw(1024) >> buff;
str.size = strlen(buff);
str.str = new char[str.size + 1];
strcpy(str.str, buff);
return stream;
}
bool operator==(const MyString& lhs, const MyString& rhs)
{
return strcmp(lhs.c_str(), rhs.c_str()) == 0;
}
bool operator<=(const MyString& lhs, const MyString& rhs)
{
return strcmp(lhs.c_str(), rhs.c_str()) <= 0;
}
bool operator<(const MyString& lhs, const MyString& rhs)
{
return strcmp(lhs.c_str(), rhs.c_str()) < 0;
}
MyString::MyString(MyString&& otherString)
{
str = otherString.str;
size = otherString.size;
otherString.str = nullptr;
}
MyString& MyString::operator=(MyString&& otherString)
{
if (this != &otherString)
{
free();
str = otherString.str;
otherString.str = nullptr;
size = otherString.size;
}
return *this;
}
MyString MyString::subString(size_t start, size_t end) const
{
if (end < start || end >= size)
throw std::logic_error("Invalid params");
MyString result;
delete[] result.str;
result.str = new char[end - start + 2];
for (int i = start; i <= end; i++)
result.str[i - start] = str[i];
result.str[(end - start) + 1] = '\0';
result.size = end - start + 1;
return result;
}
const char& MyString::operator[](size_t index) const
{
if (index > size)
throw std::out_of_range("Out of range!");
return str[index];
}
char& MyString::operator[](size_t index)
{
if (index > size)
throw std::out_of_range("Out of range!");
return str[index];
}
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