1 files changed, 142 insertions, 0 deletions
diff --git a/Sem. 09/StringPool/StringPool.cpp b/Sem. 09/StringPool/StringPool.cpp
new file mode 100644
index 0000000..ffe8f5c
--- /dev/null
+++ b/Sem. 09/StringPool/StringPool.cpp
@@ -0,0 +1,142 @@
+#include "StringPool.h"
+
+void StringPool::copyFrom(const StringPool& other)
+{
+	data = new MyString * [other.count];
+	for (size_t i = 0; i < other.count; i++)
+		data[i] = new MyString(*other.data[i]);
+	count = other.count;
+}
+
+StringPool::StringPool()
+{
+	count = 0;
+	data = nullptr;
+}
+void StringPool::free()
+{
+	for (size_t i = 0; i < count; i++)
+		delete data[i]; //destr of MyString
+	delete[] data;
+}
+
+void StringPool::resize(size_t newCount)
+{
+	MyString** resizedArray = new MyString*[newCount];
+
+	for (size_t i = 0; i < std::min(newCount,count); i++)
+		resizedArray[i] = data[i];
+	count = newCount;
+
+	delete[] data;
+	data = resizedArray;
+}
+
+StringPool& StringPool::operator*=(const MyString& word)
+{
+	if ((*this)[word])
+		return *this;
+	resize(count + 1);
+	data[count - 1] = new MyString(word);
+	size_t currentStringPosition = count - 1;
+	while (currentStringPosition > 0 && *data[currentStringPosition] < *data[currentStringPosition - 1])
+	{
+		std::swap(data[currentStringPosition], data[currentStringPosition - 1]);
+		currentStringPosition--;
+	}
+	return *this;
+}
+
+StringPool& StringPool::operator/=(const MyString& str)
+{
+	int indexOfWord = findWord(str);
+	if (indexOfWord == -1)
+		return *this;
+
+	delete data[indexOfWord];
+
+	for (int i = indexOfWord; i < count - 1; i++)
+		data[i] = data[i + 1];
+
+	resize(count - 1);
+	return *this;
+}
+
+
+int StringPool::findWord(const MyString& str) const
+{
+	int l = 0;
+	int r = count - 1;
+
+	while (l <= r)
+	{
+		size_t mid = l + (r - l) / 2;
+
+		if (*data[mid] == str)
+			return mid;
+		else if (*data[mid] < str)
+			l = mid + 1;
+		else
+			r = mid - 1;
+	}
+	return -1;
+}
+bool StringPool::operator[](const MyString& str) const
+{
+	return findWord(str) != -1;
+}
+
+std::ostream& operator<<(std::ostream& stream, const StringPool& pool)
+{
+	for (size_t i = 0; i < pool.count; i++)
+		stream << (*pool.data[i]) << " ";
+	return stream;
+}
+void operator>>(const MyString& str, StringPool& pool)
+{
+	pool *= str;
+}
+StringPool& StringPool::operator+=(const StringPool& other)
+{
+	for (size_t i = 0; i < other.count; i++)
+		(*this) *= (*other.data[i]);
+	return *this;
+}
+StringPool& StringPool::operator-=(const StringPool& other)
+{
+	for (size_t i = 0; i < other.count; i++)
+		(*this) /= (*other.data[i]);
+	return *this;
+}
+
+StringPool operator+(const StringPool& lhs, const StringPool& rhs)
+{
+	StringPool copy(lhs);
+	copy += rhs;
+	return copy;
+}
+StringPool operator-(const StringPool& lhs, const StringPool& rhs)
+{
+	StringPool copy(lhs);
+	copy -= rhs;
+	return copy;
+}
+
+StringPool::StringPool(const StringPool& other)
+{
+	copyFrom(other);
+}
+StringPool& StringPool::operator=(const StringPool& other)
+{
+	if (this != &other)
+	{
+		free();
+		copyFrom(other);
+	}
+	return *this;
+}
+
+StringPool::~StringPool() 
+{
+	free();
+}
+\ No newline at end of file