tmp

inc/Interpreter.hpp

@@ -5,6 +5,7 @@
 
 class Interpreter {
   struct Command {
+    const char* description = nullptr;
     ui32 numArguments = 0;
     bool(*callback)(FileSystem&, const std::vector<std::string>&) = nullptr;
   };
@@ -13,6 +14,7 @@ public:
   Interpreter();
 
   void interpret(const std::string& command);
+  void printHelp();
 
 private:
   static void reportError(const std::string& string);

src/FileSystem.cpp

@@ -235,7 +235,7 @@ void Directory::getMaxDepthUtil(ui32 depth, ui32& maxDepth) const {
 }
 
 ui32 Directory::getMaxDepth() const {
-  ui32 maxDepth = 0;
+  ui32 maxDepth = 1;
   getMaxDepthUtil(1, maxDepth);
   return maxDepth;
 }
@@ -280,7 +280,7 @@ bool FileSystem::changeCurrent(const Path& path) {
   }
 
   auto node = path.isAbsolute() ? root->findNode(path.getChain(), 0) : currentDirectory->findNode(path.getChain(), 0);
-  if (node->type != Node::DIRECTORY) {
+  if (!node || node->type != Node::DIRECTORY) {
     gError = "No such directory";
     return false;
   }

src/Interpreter.cpp

@@ -10,22 +10,37 @@ void getWords(const std::string& in, std::vector<std::string>& out) {
 }
 
 Interpreter::Interpreter() {
-  mCommands["cd"] = { 1, [](FileSystem& filesystem, const std::vector<std::string>& args){
-    return filesystem.changeCurrent(args[1]);
-  }};
+  mCommands["cd"] = {
+      "change working directory",
+      1,
+      [](FileSystem& filesystem, const std::vector<std::string>& args){
+        return filesystem.changeCurrent(args[1]);
+      }
+  };
 
-  mCommands["md"] = { 1, [](FileSystem& filesystem, const std::vector<std::string>& args){
-    return filesystem.makeDirectory(args[1]);
-  }};
+  mCommands["md"] = {
+      "create directory",
+      1,
+      [](FileSystem& filesystem, const std::vector<std::string>& args){
+        return filesystem.makeDirectory(args[1]);
+      }
+  };
 }
 
 void Interpreter::reportError(const std::string& description) {
   std::cout << "ERROR : " << description << std::endl;
 }
 
-void Interpreter::interpret(const std::string& command) {
-  std::cout << "\"" << command << "\"\n";
+void Interpreter::printHelp() {
+  std::cout << "Commands: \n";
+  for (auto& command : mCommands) {
+    std::cout << command.first << " - ";
+    std::cout << command.second.description;
+    std::cout << "\n";
+  }
+}
 
+void Interpreter::interpret(const std::string& command) {
   std::vector<std::string> words;
   getWords(command, words);
 
@@ -41,6 +56,7 @@ void Interpreter::interpret(const std::string& command) {
 
   if (iter == mCommands.end()) {
     reportError("Command not found");
+    printHelp();
     return;
   }