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#include "String.h"
#include "string.h"
void String::free() {
delete[] str;
}
void String::copyFrom(const String& other) {
length = other.length;
// Не забравяме за терминиращата нула!
str = new char[length + 1];
for (unsigned i = 0; i <= length; ++i)
str[i] = other.str[i];
}
String::String() {
length = 0;
str = new char[1];
str[0] = '\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(const char* str) {
length = strlen(str);
this->str = new char[length + 1];
for (unsigned i = 0; i <= length; ++i)
this->str[i] = str[i];
}
unsigned String::GetLength() {
return length;
}
const char* String::GetStr() {
return str;
}
String String::Substring(unsigned startIndex, unsigned endIndex) {
if (endIndex >= length)
endIndex = length - 1;
String ret;
// Не забравяме за терминиращата нула!
ret.length = endIndex - startIndex + 2;
ret.str = new char[ret.length];
for (unsigned i = 0; i <= ret.length; ++i)
ret.str[i] = this->str[i + startIndex];
return ret;
}
String String::Concat(const String& rightHalf) {
String ret;
// Не забравяме за терминиращата нула!
ret.length = length + rightHalf.length + 1;
ret.str = new char[ret.length];
for (unsigned i = 0; i < length; ++i)
ret.str[i] = this->str[i];
for (unsigned i = 0; i <= rightHalf.length; ++i)
ret.str[i + length] = this->str[i];
return ret;
}
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