FileReplacer.cpp

[詳解]

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   FileReplacer.cpp                                   :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: kamitsui <kamitsui@student.42tokyo.jp>     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/04/18 15:28:38 by kamitsui          #+#    #+#             */
/*   Updated: 2025/04/23 01:01:07 by kamitsui         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include "FileReplacer.hpp"
#include <sstream>
 
FileReplacer::FileReplacer() : filename(""), s1(""), s2("") {}
 
FileReplacer::FileReplacer(const std::string &filename, const std::string &s1, const std::string &s2)
    : filename(filename), s1(s1), s2(s2) {}
 
FileReplacer::FileReplacer(const FileReplacer &other) : filename(other.filename), s1(other.s1), s2(other.s2) {}
 
FileReplacer &FileReplacer::operator=(const FileReplacer &other) {
    if (this != &other) {
        filename = other.filename;
        s1 = other.s1;
        s2 = other.s2;
    }
    return *this;
}
 
FileReplacer::~FileReplacer() {}
 
const std::string &FileReplacer::getFileName() const { return filename; }
 
const std::string &FileReplacer::getS1() const { return s1; }
 
const std::string &FileReplacer::getS2() const { return s2; }
 
void FileReplacer::processFile() {
    if (getS1().empty()) {
        throw std::runtime_error("Empty <string_find_to\n");
    }
    std::ifstream inputFile(filename.c_str());
    if (!inputFile.is_open()) {
        throw std::runtime_error("Could not open input file: " + filename);
    }
 
    std::string outputFilepath = filename + ".replace";
    std::cout << "create filestream path [" << outputFilepath << "]" << std::endl;
    std::ofstream outputFile(outputFilepath.c_str());
    if (!outputFile.is_open()) {
        throw std::runtime_error("Could not open output file: " + outputFilepath);
    }
 
    std::string line;
    while (std::getline(inputFile, line)) {
        std::string resultLine = "";
        size_t pos = 0;
        while (pos < line.length()) {
            size_t foundPos = line.find(s1, pos);
            if (foundPos == std::string::npos) {
                resultLine += line.substr(pos);
                break;
            } else {
                resultLine += line.substr(pos, foundPos - pos);
                resultLine += s2;
                pos = foundPos + s1.length();
            }
        }
        outputFile << resultLine << std::endl;
    }
 
    inputFile.close();
    outputFile.close();
}