feat(Week05): Add solutions

4 files changed, 229 insertions, 0 deletions

diff --git a/Week05/Exercise02/String.cpp b/Week05/Exercise02/String.cpp
new file mode 100644
index 0000000..e2b082d
--- /dev/null
+++ b/Week05/Exercise02/String.cpp
@@ -0,0 +1,103 @@
+#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];
+	strncpy(str, other.str, length + 1);
+}
+
+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;
+
+		other.str = nullptr;
+		other.length = 0;
+	}
+	return *this;
+}
+
+String::String(const char* str) {
+	length = strlen(str);
+	this->str = new char[length + 1];
+	strncpy(this->str, str, length + 1);
+}
+
+String String::Substring(unsigned startIndex, unsigned length) const {
+	String result;
+	if (startIndex >= this->length) {
+		return result;
+	}
+
+	if (startIndex + length >= this->length) {
+		length = this->length - startIndex;
+	}
+
+	result.length = length;
+	result.str = new char[length + 1];
+	strncpy(result.str, str, length);
+	result.str[length + 1] = '\0';
+
+	return result;
+}
+
+void String::Concat(const String& end) {
+	char* newStr = new char[length + end.length + 1];
+	strncpy(newStr, str, length);
+	strncpy(newStr + length, end.str, end.length + 1);
+
+	delete[] str;
+	str = newStr;
+	length += end.length;
+}
+
+unsigned String::CountWords() const {
+	unsigned words = 0;
+	bool prevBlank = true;
+
+	for (const char* s = str; *s != '\0'; ++s) {
+		if (prevBlank && *s != ' ')
+			++words;
+		prevBlank = *s == ' ';
+	}
+
+	return words;
+}
diff --git a/Week05/Exercise02/String.h b/Week05/Exercise02/String.h
new file mode 100644
index 0000000..f47b7c8
--- /dev/null
+++ b/Week05/Exercise02/String.h
@@ -0,0 +1,32 @@
+#ifndef _STRING
+#define _STRING
+
+class String {
+	char* str;
+	// Не е нужно да пазим и дължината като атрибут,
+	// можем винаги да си я смятаме с strlen, но
+	// е по-културно така
+	unsigned length;
+
+	void free();
+	void copyFrom(const String& other);
+
+public:
+	String();
+	~String();
+	String(const String& other);
+	String& operator=(const String& other);
+
+	String(String&& other);
+	String& operator=(String&& other);
+
+	String(const char* str);
+	String Substring(unsigned startIndex, unsigned length) const;
+	void Concat(const String& end);
+
+	/* Помощна функция */
+
+	unsigned CountWords() const;
+};
+
+#endif /* _STRING */
diff --git a/Week05/Exercise02/Text.cpp b/Week05/Exercise02/Text.cpp
new file mode 100644
index 0000000..b6143c0
--- /dev/null
+++ b/Week05/Exercise02/Text.cpp
@@ -0,0 +1,67 @@
+#include "Text.h"
+
+void Text::free() {
+	delete[] lines;
+}
+
+void Text::copyFrom(const Text& other) {
+	lineCount = other.lineCount;
+
+	lines = new String[lineCount];
+	for (unsigned i = 0; i < lineCount; ++i)
+		lines[i] = other.lines[i];
+}
+
+Text::Text() {
+	lines = nullptr;
+	lineCount = 0;
+}
+
+Text::~Text() {
+	free();
+}
+
+Text::Text(const Text& other) {
+	copyFrom(other);
+}
+
+Text& Text::operator=(const Text& other) {
+	if (this != &other) {
+		free();
+		copyFrom(other);
+	}
+	return *this;
+}
+
+Text::Text(Text&& other) {
+	lines = other.lines;
+	lineCount = other.lineCount;
+
+	other.lines = nullptr;
+	other.lineCount = 0;
+}
+
+unsigned Text::LineCount() const {
+	return lineCount;
+}
+
+unsigned Text::WordCount() const {
+	unsigned totalCount = 0;
+
+	for (unsigned i = 0; i < lineCount; ++i)
+		totalCount += lines[i].CountWords();
+
+	return totalCount;
+}
+
+Text Text::SubText(unsigned startLine, unsigned startCol, unsigned endLine, unsigned endCol) const {
+	Text result;
+	result.lineCount = endLine - startLine + 1;
+	result.lines = new String[lineCount];
+
+	for (unsigned i = 0; i < result.lineCount; ++i) {
+		result.lines[i] = lines[i + startLine].Substring(startCol, endCol - startCol + 1);
+	}
+
+	return result;
+}
diff --git a/Week05/Exercise02/Text.h b/Week05/Exercise02/Text.h
new file mode 100644
index 0000000..a1366e0
--- /dev/null
+++ b/Week05/Exercise02/Text.h
@@ -0,0 +1,27 @@
+#ifndef _TEXT
+#define _TEXT
+
+#include "String.h"
+
+class Text {
+	String* lines;
+	unsigned lineCount;
+
+	void free();
+	void copyFrom(const Text& other);
+
+public:
+	Text();
+	~Text();
+	Text(const Text& other);
+	Text& operator=(const Text& other);
+
+	Text(Text&& other);
+	Text& operator=(Text&& other);
+
+	unsigned LineCount() const;
+	unsigned WordCount() const;
+	Text SubText(unsigned startLine, unsigned startCol, unsigned endLine, unsigned endCol) const;
+};
+
+#endif /* _TEXT */