BinaryFileManagment.cpp

#include "BinaryFileManagement.h"
#include <fstream>
#include <iostream>
#include <sstream>

void BinaryFile::createFromText(const string& textFileName, const string& binaryFileName) {
    ifstream textFile(textFileName);
    ofstream binaryFile(binaryFileName, ios::binary);

    if (!textFile.is_open() || !binaryFile.is_open()) {
        cerr << "Failed to open files!" << endl;
        return;
    }

    string line;
    while (getline(textFile, line)) {
        // Находим позицию первого пробела
        size_t pos = line.find(' ');
        if (pos != string::npos) {
            // Разделяем строку на английское и русское слово
            string englishWord = line.substr(0, pos);
            string russianWord = line.substr(pos + 1);

            DictionaryEntry entry(englishWord, russianWord);
            binaryFile.write(reinterpret_cast<char*>(&entry), sizeof(entry));
        }
    }

    textFile.close();
    binaryFile.close();
}


void BinaryFile::addRecord(const string& binaryFileName, DictionaryEntry& entry) {
    ofstream binaryFile(binaryFileName, ios::binary | ios::app);
    if (!binaryFile.is_open()) {
        cerr << "Failed to open binary file!" << endl;
        return;
    }

    binaryFile.write(reinterpret_cast<char*>(&entry), sizeof(entry));
    binaryFile.close();
}

void BinaryFile::removeRecord(const string& binaryFileName, const string& key) {
    ifstream binaryFile(binaryFileName, ios::binary);
    ofstream tempFile("temp.bin", ios::binary);

    if (!binaryFile.is_open() || !tempFile.is_open()) {
        cerr << "Failed to open files!" << endl;
        return;
    }

    DictionaryEntry entry;
    while (binaryFile.read(reinterpret_cast<char*>(&entry), sizeof(entry))) {
        if (strncmp(entry.englishWord.data(), key.c_str(), entry.englishWord.size()) != 0) {
            tempFile.write(reinterpret_cast<char*>(&entry), sizeof(entry));
        }
    }

    binaryFile.close();
    tempFile.close();

    // Переименовываем tempFile в binaryFileName
    remove(binaryFileName.c_str());
    rename("temp.bin", binaryFileName.c_str());
}

void BinaryFile::readRecord(const string& binaryFileName, int recordNumber) {
    ifstream binaryFile(binaryFileName, ios::binary);
    if (!binaryFile.is_open()) {
        cerr << "Failed to open binary file!" << endl;
        return;
    }

    binaryFile.seekg(recordNumber * sizeof(DictionaryEntry));
    if (!binaryFile) {
        cerr << "Error seeking in binary file!" << endl;
        return;
    }

    DictionaryEntry entry;
    binaryFile.read(reinterpret_cast<char*>(&entry), sizeof(entry));
    if (entry.englishWord[0] != '\0') {
        cout << "Найдено: " << entry.englishWord.data() << " - " << entry.russianWord.data() << endl;
    }
    else {
        cout << "Запись не найдена." << endl;
    }
    binaryFile.close();
}

// Линейный поиск и вывод записи по ключу
void BinaryFile::searchRecord(const string& binaryFileName, const string& key) {
    ifstream binaryFile(binaryFileName, ios::binary);
    if (!binaryFile.is_open()) {
        cerr << "Failed to open binary file for search!" << endl;
        return;
    }

    DictionaryEntry entry;
    while (binaryFile.read(reinterpret_cast<char*>(&entry), sizeof(entry))) {
        if (strncmp(entry.englishWord.data(), key.c_str(), entry.englishWord.size()) == 0) {
            cout << "Найдено (линейный поиск): " << entry.englishWord.data() << " - " << entry.russianWord.data() << endl;
            return;
        }
    }

    cout << "Запись не найдена." << endl;
    binaryFile.close();
}