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#include "String.h"
#include <cstring>
void String::free() {
delete[] str;
}
void String::copyFrom(const String& other) {
length = other.length;
// Не забравяме за терминиращата нула
str = new char[length + 1];
strcpy(str, other.str);
}
String::String() {
str = nullptr;
length = 0;
}
String::~String() {
free();
}
String::String(const String& other) {
copyFrom(other);
}
String& String::operator=(const String& other) {
if (this != &other) {
free();
copyFrom(other);
}
return *this;
}
String::String(String&& other) {
str = other.str;
length = other.length;
other.str = nullptr;
other.length = 0;
}
String& String::operator=(String&& other) {
if (this != &other) {
free();
str = other.str;
length = other.length;
str = nullptr;
length = 0;
}
return *this;
}
String::String(const char* str) {
this->length = strlen(str);
this->str = new char[this->length + 1];
strcpy(this->str, str);
}
std::ostream& operator<<(std::ostream& ostr, const String& string) {
if (string.str == nullptr)
return ostr << "";
return ostr << string.str;
}
String& String::operator+=(const String& other) {
char* largerStr = new char[length + other.length + 1];
strcpy(largerStr, str);
strcat(largerStr, other.str);
delete[] str;
str = largerStr;
length += other.length;
return *this;
}
char String::operator[](unsigned index) const {
return str[index];
}
String::IndexRange::IndexRange(unsigned index) {
start = end = index;
}
String::IndexRange& String::IndexRange::operator,(const IndexRange& rhs) {
if (rhs.start < this->start)
this->start = rhs.start;
if (this->end < rhs.end)
this->end = rhs.end;
return *this;
}
String String::operator[](IndexRange range) const {
if (range.end >= length)
range.end = length - 1;
if (range.start > range.end)
return String();
if (range.start == 0 && range.end == length - 1)
return *this;
String substr;
substr.length = range.end - range.start + 1;
substr.str = new char[substr.length + 1];
strncpy(substr.str, str + range.start, substr.length);
substr.str[substr.length] = '\0';
return substr;
}
bool operator==(const String& lhs, const String& rhs) {
return strcmp(lhs.str, rhs.str) == 0;
}
bool operator!=(const String& lhs, const String& rhs) {
return !(lhs == rhs);
}
bool operator<(const String& lhs, const String& rhs) {
return strcmp(lhs.str, rhs.str) < 0;
}
bool operator<=(const String& lhs, const String& rhs) {
return strcmp(lhs.str, rhs.str) <= 0;
}
bool operator>(const String& lhs, const String& rhs) {
return strcmp(lhs.str, rhs.str) > 0;
}
bool operator>=(const String& lhs, const String& rhs) {
return strcmp(lhs.str, rhs.str) >= 0;
}
bool operator<<(const String& lhs, const String& rhs) {
if (rhs.length > lhs.length)
return false;
return strcmp(lhs.str + (lhs.length - rhs.length), rhs.str) == 0;
}
bool operator>>(const String& lhs, const String& rhs) {
if (lhs.length > rhs.length)
return false;
return strncmp(lhs.str, rhs.str, lhs.length) == 0;
}
String operator+(const String& lhs, const String& rhs) {
return String(lhs) += rhs;
}
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