Problem 1 part 1 is OK, part 2 in progress

pb_1/problem_1.cpp

@@ -0,0 +1,100 @@
+//
+// Created by postaron on 06/12/23.
+//
+
+#include "problem_1.hpp"
+#include <array>
+#include <vector>
+#include <fstream>
+#include <iostream>
+#include <format>
+
+namespace pb1 {
+    using namespace std::string_view_literals;
+
+    constexpr std::string_view digits = "0123456789";
+
+    constexpr std::array digitLetters{
+            "one"sv,
+            "two"sv,
+            "three"sv,
+            "four"sv,
+            "five"sv,
+            "six"sv,
+            "seven"sv,
+            "eight"sv,
+            "nine"sv,
+    };
+
+    std::optional<std::ifstream> read_file(const fs::path &problemFile) noexcept {
+        std::ifstream file(problemFile);
+        if (!file.is_open()) {
+            const auto error_state = file.rdstate();
+            switch (error_state) {
+                case std::ios::badbit:
+                    std::cerr << "Fatal I/O error occurred.\n";
+                    break;
+                case std::ios::eofbit:
+                    std::cerr << "End of file reached.\n";
+                    break;
+                case std::ios::failbit:
+                    std::cerr << "Non-fatal I/O error occurred.\n";
+                    break;
+                default:
+                    std::cerr << "impossible to reach.\n";
+                    break;
+            }
+            const auto path_string = problemFile.string();
+            const auto msg = std::format("Failed to open file {}: ", path_string);
+            std::perror(msg.c_str());
+            return std::nullopt;
+        }
+        return file;
+    }
+
+    void part1(const std::string_view &toSearch, std::size_t &result) noexcept {
+        const auto first_digit_pos = toSearch.find_first_of(digits);
+        if (first_digit_pos == std::string::npos) {
+            return;
+        }
+        const auto second_part = toSearch.substr(first_digit_pos);
+        const auto second_digit_pos = second_part.find_last_of(digits) + first_digit_pos;
+        result += (toSearch[first_digit_pos] - '0') * 10 + (toSearch[second_digit_pos] - '0');
+    }
+
+    std::size_t solve_problem_part1(const fs::path &problemFile) {
+        auto file_option = read_file(problemFile);
+        if (!file_option) {
+            return 0;
+        }
+        std::ifstream &file = *file_option;
+        std::size_t result = 0;
+        for (std::string line; std::getline(file, line);) {
+            part1(line, result);
+        }
+        return result;
+    }
+
+    void part2(const std::string_view &toSearch, std::vector<std::string> &splittedLine, std::size_t &result) noexcept {
+        std::string line_with_numbers;
+        line_with_numbers.reserve(toSearch.size());
+        for (int i = 0; i < toSearch.size(); ++i) {
+
+        }
+    }
+
+    std::size_t solve_problem_part2(const fs::path &problemFile) {
+        auto file_option = read_file(problemFile);
+        if (!file_option) {
+            return 0;
+        }
+        std::ifstream &file = *file_option;
+        std::vector<std::string> splitted_line;
+        std::size_t result = 0;
+        for (std::string line; std::getline(file, line);) {
+            part2(line, splitted_line, result);
+            splitted_line.clear();
+        }
+        return result;
+    }
+}

pb_1/problem_1.hpp

@@ -0,0 +1,17 @@
+//
+// Created by postaron on 06/12/23.
+//
+
+#ifndef ADVENTOFCODE2023_PROBLEM_1_HPP
+#define ADVENTOFCODE2023_PROBLEM_1_HPP
+
+#include <filesystem>
+
+namespace pb1 {
+    namespace fs = std::filesystem;
+    std::size_t solve_problem_part1(const fs::path& problemFile);
+
+    std::size_t solve_problem_part2(const fs::path& problemFile);
+}
+
+#endif //ADVENTOFCODE2023_PROBLEM_1_HPP