[w9] Added rough solution to ex 3

1 files changed, 132 insertions, 0 deletions

diff --git a/week09/Exercise3/Train.cpp b/week09/Exercise3/Train.cpp
new file mode 100644
index 0000000..68d4206
--- /dev/null
+++ b/week09/Exercise3/Train.cpp
@@ -0,0 +1,132 @@
+#include "Train.h"
+#include <iostream>
+#include <cstring>
+#include <fstream>
+
+void Train::free() {
+	delete[] regionsFileName;
+	delete[] currentRegion;
+}
+
+void Train::copyFrom(const Train& other) {
+	strcpy(this->model, other.model);
+	this->railID = other.railID;
+	this->regionsFileName = new char[strlen(other.regionsFileName) + 1];
+	strcpy(this->regionsFileName, other.regionsFileName);
+	this->currentRegion = new char[strlen(other.currentRegion) + 1];
+	strcpy(this->currentRegion, other.currentRegion);
+}
+
+Train::Train() {
+	model[0] = '\0';
+	railID = 0;
+	regionsFileName = currentRegion = nullptr;
+}
+
+Train::~Train() {
+	free();
+}
+
+Train::Train(const Train& other) {
+	copyFrom(other);
+}
+
+Train& Train::operator=(const Train& other) {
+	if (this != &other) {
+		free();
+		copyFrom(other);
+	}
+	return *this;
+}
+
+Train::Train(Train&& other) {
+	strcpy(this->model, other.model);
+	this->railID = other.railID;
+
+	this->regionsFileName = other.regionsFileName;
+	other.regionsFileName = nullptr;
+	this->currentRegion = other.currentRegion;
+	other.currentRegion = nullptr;
+}
+
+void Train::setCurrentRegion(std::ifstream& inFile) {
+	int start = inFile.tellg();
+	while (!inFile.eof() && inFile.peek() != '\n') {
+		inFile.get();
+	}
+	inFile.clear();
+
+	int length = inFile.tellg();
+	this->currentRegion = new char[length + 1];
+
+	inFile.seekg(start, std::ios::beg);
+	inFile.getline(this->currentRegion, length + 1);
+}
+
+Train::Train(const char model[128], unsigned railID, const char* regionsFileName) {
+	strcpy(this->model, model);
+	this->railID = railID;
+	this->regionsFileName = new char[strlen(regionsFileName) + 1];
+	strcpy(this->regionsFileName, regionsFileName);
+
+	std::ifstream inFile(regionsFileName);
+	if (!inFile.is_open()) {
+		throw "Couldn't open regions file!";
+	}
+
+	setCurrentRegion(inFile);
+
+	inFile.close();
+}
+
+// Обикаля сегашния ред във файла и сравнява всяка буква със съответната от str
+// Във всички случаи предвижва inFile напред към следващия ред
+bool fileStringEq(std::ifstream& inFile, const char* str) {
+	if (inFile.eof()) {
+		inFile.close();
+		throw -1;
+	}
+
+	bool equal = true;
+	while (!inFile.eof() && inFile.peek() != '\n') {
+		if (inFile.peek() != *str) {
+			equal = false;
+		}
+		inFile.get();
+		if (*str != '\0') str++;
+	}
+
+	if (!inFile.eof()) {
+		inFile.get();
+	}
+	return equal && *str == '\0';
+}
+
+void Train::TransferNextRegion() {
+	std::ifstream inFile(regionsFileName);
+	if (!inFile.is_open()) {
+		throw "Couldn't open regions file!";
+	}
+
+	while (!fileStringEq(inFile, currentRegion));
+	setCurrentRegion(inFile);
+
+	inFile.close();
+}
+
+void Train::SwitchRailLine(unsigned railID, const char* regionsFileName) {
+	this->railID = railID;
+	delete[] this->regionsFileName;
+
+	this->regionsFileName = new char[strlen(regionsFileName) + 1];
+	strcpy(this->regionsFileName, regionsFileName);
+
+	std::ifstream inFile(regionsFileName);
+	if (!inFile.is_open()) {
+		throw "Couldn't open regions file!";
+	}
+
+	setCurrentRegion(inFile);
+
+	inFile.close();
+}