Various memory leak fixes

src/cart.c

@@ -70,6 +70,10 @@ int nes_cart_init_mem(nes_cart* cart, void* mem, int len) {
 }
 
 void nes_cart_done(nes_cart* cart) {
+    if (NULL != cart->mapper) {
+        nes_map_done(cart->mapper);
+        cart->mapper = NULL;
+    }
     if (NULL != cart->ines_mem) {
         unmap_file(cart->ines_mem, cart->ines_size);
         cart->ines_mem = NULL;

src/nese.c

@@ -124,7 +124,7 @@ static int select_rom(menu_state* menu, nes_Renderer* rend,
     nes_cart new_cart = {0};
 
     while (0 == status && NULL == cart.file) {
-        // Display a load failure message?
+        // Display a load failure message
         if (NULL != cart.filename) {
             char message[1024];
             snprintf(message, sizeof(message) - 1,
@@ -134,10 +134,11 @@ static int select_rom(menu_state* menu, nes_Renderer* rend,
                 // Program closed inside modal
                 status = input_Result_Quit;
             }
+            free(cart.filename);
+            cart.filename = NULL;
         }
 
         if (0 == status) {
-            // If we didn't launch with a file, run the loader
             cart.filename = run_main_menu(menu, rend,
                                           input, sys);
 
@@ -226,9 +227,9 @@ int main(int argc, char* argv[]) {
         }
     }
 
-    menu_state main_menu = {0};
+    // If we didn't launch with a file, run the loader
     if (0 == status && NULL == cart.file) {
-        status = select_rom(&main_menu, rend, input,
+        status = select_rom(NULL, rend, input,
                             &sys, &cart);
     }
 

src/overlay.c

@@ -10,6 +10,17 @@ int overlay_init(Overlay* overlay) {
     return 0;
 }
 
+void overlay_done(Overlay* overlay) {
+    overlay_message* next = NULL;
+    for (   overlay_message* message = overlay->messages;
+            NULL != message;
+            message = next) {
+        next = message->next;
+        free(message->string);
+        free(message);
+    }
+}
+
 int overlay_clear(Overlay* overlay) {
     int n_cleared = 0;
     for (   overlay_message* message = overlay->messages;

src/overlay.h

@@ -17,6 +17,7 @@ typedef struct {
 
 
 int overlay_init(Overlay*);
+void overlay_done(Overlay*);
 int overlay_add_message(Overlay*, const char*, int expiry);
 int overlay_clear_message(Overlay*, int id);
 int overlay_clear(Overlay*);

src/sdl_render.c

@@ -43,8 +43,9 @@ typedef struct {
     SDL_Surface* background;
     SDL_Surface* foreground;
     SDL_Surface* target;
-    SDL_Texture* texture;
     sdl_overlay_font font;
+
+    SDL_Texture* texture;
     int win_w;
     int win_h;
 } sdl_render_data;
@@ -95,7 +96,6 @@ static int sdl_render_init(nes_Renderer* rend) {
 
         } else {
             overlay_init(&rend->overlay);
-            // TODO: Cleanup
             sdl_overlay_font_init(data->renderer, &data->font);
         }
     }
@@ -169,6 +169,8 @@ static int sdl_render_init(nes_Renderer* rend) {
 
 static void sdl_render_done(nes_Renderer* rend) {
     sdl_render_data* data = (sdl_render_data*)rend->data;
+    overlay_done(&rend->overlay);
+    sdl_overlay_font_done(&data->font);
     SDL_DestroyTexture(data->texture);
     SDL_FreeSurface(data->foreground);
     SDL_FreeSurface(data->background);