[DataFileReader] Add sanity checks for files

.github/workflows/cmake.yml

@@ -29,7 +29,7 @@ jobs:
       shell: bash
       working-directory: ${{github.workspace}}/src/build
       if: matrix.os == 'windows-latest'
-      run: cmake .. -DCMAKE_BUILD_TYPE=$BUILD_TYPE -G "MSYS Makefiles"
+      run: cmake .. -DCMAKE_BUILD_TYPE=$BUILD_TYPE -G "MinGW Makefiles"
 
     - name: Run cmake (Linux)
       shell: bash

README.md

@@ -1,4 +1,12 @@
 [![Building](https://github.com/rico23rico/xpfiles/actions/workflows/cmake.yml/badge.svg)](https://github.com/rico23rico/xpfiles/actions)
 
 
-This is a support library for this project: https://github.com/JonathanOrr/A321Neo-FXPL
+This is a C++ support library for X-Plane 11 Lua plugins (working via FFI).
+
+The library is in the early stage of development and it will offer:
+- The asynchronous reading of X-Plane files (e.g., apt.dat and other files)
+- Graphics-related support functions (such as polygon triangulation)
+
+
+The library is currently developed to support the open source [A321Neo project](https://github.com/JonathanOrr/A321Neo-FXPL),
+and the development is currently focused on the needs and integration with this project.

src/data_file_reader.cpp

@@ -1,22 +1,69 @@
 #include "data_file_reader.hpp"
 #include "plugin.hpp"
 
-#include <filesystem>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdexcept>
 
 #define LOG *this->logger
 
+#define NAV_FILE_PATH  "Resources/default data/earth_nav.dat"
+#define FIX_FILE_PATH  "Resources/default data/earth_fix.dat"
+#define ARPT_FILE_PATH "Resources/default scenery/default apt dat/Earth nav data/apt.dat"
+
+
 namespace xpfiles {
 
+static bool is_a_directory(const std::string& name) noexcept {
+    struct stat info;
+    if( stat( name.c_str(), &info ) != 0 ) {
+        return false;
+    } else if( info.st_mode & S_IFDIR ) { 
+        return true;
+    } else {
+        return false;
+    }
+}
+
+static bool is_a_file (const std::string& name) noexcept {
+    struct stat info;
+    if( stat( name.c_str(), &info ) != 0 ) {
+        return false;
+    } else if( info.st_mode & S_IFREG ) { 
+        return true;
+    } else {
+        return false;
+    }
+}
+
+void DataFileReader::perform_init_checks() {
+    if (!is_a_directory(xplane_directory)) {
+        throw std::runtime_error("Directory " + xplane_directory + " is not a directory or is not accessible.");
+    }
+
+    std::string filename = xplane_directory + "/" + NAV_FILE_PATH;
+    if (!is_a_file(filename)) {
+        throw std::runtime_error("File " + filename + " is not accessible.");
+    }
+
+    filename = xplane_directory + "/" + FIX_FILE_PATH;
+    if (!is_a_file(filename)) {
+        throw std::runtime_error("File " + filename + " is not accessible.");
+    }
+
+    filename = xplane_directory + "/" + ARPT_FILE_PATH;
+    if (!is_a_file(filename)) {
+        throw std::runtime_error("File " + filename + " is not accessible.");
+    }
+
+}
+
 DataFileReader::DataFileReader(const std::string &xplane_directory) : xplane_directory(xplane_directory) {
     this->logger = get_logger();
 
     LOG << logger_level_t::DEBUG << "Initializing DataFileReader..." << ENDL;
 
-    std::filesystem::path dir_path(xplane_directory);
-
-    if (!std::filesystem::is_directory(xplane_directory)) {
-        throw std::runtime_error("Directory " + xplane_directory + "is not a directory");
-    }
+    perform_init_checks();
 
     this->my_thread = std::thread(&DataFileReader::worker, this);
     this->my_thread.detach();

src/data_file_reader.hpp

@@ -20,6 +20,10 @@ class DataFileReader {
     std::string xplane_directory;
 
     std::thread my_thread;
+
+
+
+    void perform_init_checks();
 };
 
 }