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#include "string.h"
#include <cstring>
#include <iostream>
#pragma warning(disable : 4996)
void string::copyFrom(const string& other)
{
str = new char[strlen(other.str) + 1];
strcpy(str, other.str);
size = other.size;
}
void string::free()
{
delete[] str;
}
string::string()
{
str = new char[1];
str[0] = '\0';
size = 0;
}
string::string(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);
}
}
string::string(const string& other)
{
copyFrom(other);
}
string& string::operator=(const string& other)
{
if (this != &other)
{
free();
copyFrom(other);
}
return *this;
}
string::~string()
{
free();
}
size_t string::getSize() const
{
return size;
}
void string::concat(const string& 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* string::c_str() const
{
return str;
}
string& string::operator+=(const string& other)
{
concat(other);
return *this;
}
void string::getLine(std::istream& outFile)
{
delete[] str;
char buff[1024];
outFile.getline(buff, 1024, '\n');
size_t len = strlen(buff);
str = new char[len + 1];
for (size_t i = 0; i < len; i++)
str[i] = buff[i];
str[len] = '\0';
size = len;
}
string operator+(const string& lhs, const string& rhs)
{
string copyOfLeft(lhs);
copyOfLeft += rhs;
return copyOfLeft;
}
std::ostream& operator<<(std::ostream& stream, const string& str)
{
stream << str.str;
return stream;
}
std::istream& operator>>(std::istream& stream, string& str)
{
delete[] str.str;
char buff[1024];
stream >> buff;
str.size = strlen(buff);
str.str = new char[str.size + 1];
strcpy(str.str, buff);
return stream;
}
bool operator==(const string& lhs, const string& rhs)
{
return strcmp(lhs.c_str(), rhs.c_str()) == 0;
}
bool operator<=(const string& lhs, const string& rhs)
{
return strcmp(lhs.c_str(), rhs.c_str()) <= 0;
}
bool operator<(const string& lhs, const string& rhs)
{
return strcmp(lhs.c_str(), rhs.c_str()) < 0;
}
string::string(string&& otherString)
{
str = otherString.str;
size = otherString.size;
otherString.str = nullptr;
}
string& string::operator=(string&& otherString)
{
if (this != &otherString)
{
free();
str = otherString.str;
otherString.str = nullptr;
size = otherString.size;
}
return *this;
}
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