Add to the code in c++

#include "DynamicString.h" #include #include

using std::out_of_range; using std::tolower; using std::toupper; using std::ostream; using namespace std;

//DynamicString() //Constructs an empty string. Allocating enough memory to store the null character DynamicString::DynamicString(){ cstr = new char[1]; cstr[0] = '\0'; }

//DynamicString(const char* str) //Constructs a string by copying the characters from the char array str to this object. DynamicString::DynamicString(const char* str){ int count = 0; while (str[count]) { ++count; } this->cstr = new char[count + 1]; for (int i = 0; i cstr[i] = str[i]; } this->cstr[count] = '\0'; } //int len() const //returns the length of this string int DynamicString::len() const{ int count = 0; while (cstr[count]) { ++count; } return count; }

//const char* c_str() const // returns a pointer to the underlying char array const char* DynamicString::c_str() const{ return cstr;

}

//char char_at(int position) const // returns the char at the specified position char DynamicString::char_at(int position) const{ return cstr[position]; }

//char& operator[](int position) // returns the char at the specified position char& DynamicString::operator[](int position){ return cstr[position]; }

//bool startsWith(const DynamicString& other) const //True if other is a prefix of this string bool DynamicString::startsWith(const DynamicString& other) const{ if (other.len()

//bool endsWith(const DynamicString& other) const //True if other is a suffix of this string bool DynamicString::endsWith(const DynamicString& other) const{ int len1 = len(); int len2 = other.len(); if (len2

//int compare(const DynamicString& other) const // negative if this is smaller than other, 0 if this is equal to other, positive if this is larger than other int DynamicString::compare(const DynamicString& other) const{ // Get size of this string int size1 = this->len(); // Get size of other string int size2 = other.len();

int i = 1; // Iterate through the characters while ((i != size1) || (i != size2)) { // If this is less than other if (this->cstr[i] cstr[i] > other.cstr[i]) { return 1; } i++; }

// If this is equal to other return 0; }

//int iCompare(const DynamicString& other) const // same as compare but is case-insensetive int DynamicString::iCompare(const DynamicString& other) const { // Get size of this string int size1 = this->len(); // Get size of other string int size2 = other.len();

int i = 1; // Iterate through the characters while ((i != size1) || (i != size2)) { // Compare each character after converting to lower case to make it case insensitive comparison.

// If this is less than other if (tolower(this->cstr[i]) cstr[i]) > tolower(other.cstr[i])) { return 1; } i++; }

// If this is equal to other return 0; }

//DynamicString& toLower() // converts the string to lowercase DynamicString& DynamicString::toLower() { // Iterate through the characters of this string for (int i = 0; i

//DynamicString& toUpper() // converts the string to uppercase DynamicString& DynamicString::toUpper() { // Iterate through the characters of this string for (int i = 0; i

//DynamicString& replace(char old, char new) //replace all instances of old with new DynamicString& DynamicString::replace(char old, char newCh){ char letter; for (int i = 0; i

//int find(char needle, int start = 0) const //return the first index of the specified char or -1 if the char is not found starting from index start. int DynamicString::find(char c, int start) const{ for (int i = start; i

//int reverseFind(char needle, int start) const //return the right-most index (less than or equal to start) of the specified char or -1 if the char is not found. int DynamicString::reverseFind(char c, int start) const{ for (int i = start; i >= 0; i--) { if (cstr[i] == c) { return i; } } return -1; }

int DynamicString::reverseFind(char c) const { int lastIndex = len() - 1; for (int i = lastIndex; i >= 0; --i) { if (cstr[i] == c) { return i; } } return -1; }

//Copy constructor for the DynamicString. This creates a deep copy of the char array by allocating a new array and copy each character over. DynamicString::DynamicString(const DynamicString& other) {

int len = other.len();

this->cstr = new char[len + 1]; for (int i = 0; i cstr[i] = other.cstr[i];

} this->cstr[len] = '\0'; } //Assignment operator. Like the copy-constructor, this method creates a deep copy of the char array. //However, it also needs to clean up previous memory allocations as well as check for self-assignment. DynamicString& DynamicString::operator=(const DynamicString& other) {

int len = other.len(); this->cstr = new char[len + 1]; for (int i = 0; i cstr[i] = other.cstr[i]; } this->cstr[len] = '\0';

// delete the space. delete[] other.cstr; } //Destructor frees up (deletes) any dynamically allocated memory used be the class (i.e. the char array) DynamicString::~DynamicString() { delete[] this-> cstr; }

ostream& operator Create a new URL class which inherits from the DynamicString class. A URL is a Dynamic String with a specific format :///. When comparing two urls, the scheme and authority are case-insensitive but the path is case-sensitive. At a minimum you will need to override the following methods: URL(const char* str) - Constructor checks that the str is a correctly formatted url. For this assignment, any url that has "://" with at least one character on each side of the "://" is considered valid. If the url is incorrectly formatted you should throw an error. Note that they Dynamic String(const char* str) constructor should be used to actually store the string. int compare(const URL& other) - Compares to URLs. The scheme (i.e. the portion of the string prior to "://") and the authority (i.e. the portion of the string between "://" and the next "/") should be compared ignoring upper/lower- case differences. The path should be compared taking differences in upper/lower case into account. Hints for the URL class You may want to store the Scheme, Authority and Path as distinct class variables for easier comparisons between strings. Use the existing DynamicString methods like find, compare and iCompare to parse and compare urls