#include "myString.h"
#include <cstring>
#include <algorithm>

myString::myString() : size(0), data(NULL) {}

myString::myString(char* s) : size(strlen(s))
{
    data = new char[size];
    strncpy(data, s, size);
}

myString::myString(myString const& s)
{
    size = s.size;
    data = new char[size];
    strncpy(data, s.data, size);
}

myString::~myString()
{
    delete[] data;
}

myString const& myString::operator=(myString const& s)
{
    if (this != &s) {
        delete[] data;
        size = s.size;
        data = new char[size];
        strncpy(data, s.data, size);
    }
}

bool myString::operator<(myString const& s) const
{
    int t = strncmp(data, s.data, std::min(size, s.size));
    return t < 0 || (t == 0 && size < s.size);
}

bool myString::operator<=(myString const& s) const
{
    int t = strncmp(data, s.data, std::min(size, s.size));
    return t <= 0 || (t == 0 && size <= s.size);
}

bool myString::operator>(myString const& s) const
{
    return s < (*this);
}

bool myString::operator>=(myString const& s) const
{
    return s <= (*this);
}

bool myString::operator==(myString const& s) const
{
    return size == s.size && strncmp(data, s.data, std::min(size, s.size)) == 0;
}

char const& myString::operator[](int ind) const
{
    return data[ind];
}

char& myString::operator[](int ind)
{
    return data[ind];
}

myString& myString::append(myString const& s)
{
    char* newData = new char[size + s.size];
    strncpy(newData, data, size);
    strncpy(newData + size, s.data, s.size);
    delete[] data;
    size += s.size;
    data = newData;
    return (*this);
}

myString& myString::reserve(int n)
{
    char* newData = new char[size + n];
    strncpy(newData, data, size);
    delete[] data;
    size += n;
    data = newData;
    return (*this);
}

int myString::length() const
{
    return size;
}

std::ostream& operator<<(std::ostream& os, myString& s)
{
    os.write(s.data, s.size);
    return os;
}

std::istream& operator>>(std::istream& is, myString& s)
{
    if (s.data != NULL)
        is.read(s.data, s.size);
    return is;
}