Revert "(Config file) Don't save 'nul' entries in config file anymore -"

This reverts commit 4c6d46137c05e583de5d8978e95991f36344d86b.

configuration.c

@@ -3725,7 +3725,7 @@ bool config_save_autoconf_profile(const char *path, unsigned user)
       if (bind->valid)
          input_config_save_keybind(
                conf, "input", input_config_bind_map_get_base(i),
-               bind);
+               bind, false);
    }
 
    ret = config_file_write(conf, autoconf_file, false);

configuration.h

@@ -53,10 +53,6 @@
    var = newvar; \
 }
 
-#ifndef EXPLICIT_NULL
-#define EXPLICIT_NULL "nul"
-#endif
-
 enum crt_switch_type
 {
    CRT_SWITCH_NONE = 0,

file_path_special.c

@@ -453,7 +453,7 @@ void fill_short_pathname_representation_wrapper(char* out_rep,
 
    last_slash  = find_last_slash(path_short);
 
-   if (last_slash)
+   if (last_slash != NULL)
    {
       /* We handle paths like:
        * /path/to/file.7z#mygame.img

input/input_driver.h

@@ -545,7 +545,8 @@ uint16_t input_config_get_vid(unsigned port);
 void input_config_save_keybinds_user(void *data, unsigned user);
 
 void input_config_save_keybind(void *data, const char *prefix,
-      const char *base, const struct retro_keybind *bind);
+      const char *base, const struct retro_keybind *bind,
+      bool save_empty);
 
 void input_config_reset(void);
 

retroarch.c

@@ -17731,12 +17731,9 @@ void input_config_save_keybinds_user(void *data, unsigned user)
       fill_pathname_join_delim(key, prefix, base, '_', sizeof(key));
 
       input_keymaps_translate_rk_to_str(bind->key, btn, sizeof(btn));
+      config_set_string(conf, key, btn);
 
-      if (!string_is_equal(btn, EXPLICIT_NULL))
+      input_config_save_keybind(conf, prefix, base, bind, true);
-      {
-         config_set_string(conf, key, btn);
-         input_config_save_keybind(conf, prefix, base, bind);
-      }
    }
 }
 
@@ -17778,7 +17775,7 @@ static void save_keybind_hat(config_file_t *conf, const char *key,
 static void save_keybind_joykey(config_file_t *conf,
       const char *prefix,
       const char *base,
-      const struct retro_keybind *bind)
+      const struct retro_keybind *bind, bool save_empty)
 {
    char key[64];
 
@@ -17787,7 +17784,12 @@ static void save_keybind_joykey(config_file_t *conf,
    fill_pathname_join_delim_concat(key, prefix,
          base, '_', "_btn", sizeof(key));
 
-   if (GET_HAT_DIR(bind->joykey))
+   if (bind->joykey == NO_BTN)
+   {
+       if (save_empty)
+         config_set_string(conf, key, "nul");
+   }
+   else if (GET_HAT_DIR(bind->joykey))
       save_keybind_hat(conf, key, bind);
    else
       config_set_uint64(conf, key, bind->joykey);
@@ -17796,7 +17798,7 @@ static void save_keybind_joykey(config_file_t *conf,
 static void save_keybind_axis(config_file_t *conf,
       const char *prefix,
       const char *base,
-      const struct retro_keybind *bind)
+      const struct retro_keybind *bind, bool save_empty)
 {
    char key[64];
    unsigned axis   = 0;
@@ -17809,7 +17811,12 @@ static void save_keybind_axis(config_file_t *conf,
          "_axis",
          sizeof(key));
 
-   if (AXIS_NEG_GET(bind->joyaxis) != AXIS_DIR_NONE)
+   if (bind->joyaxis == AXIS_NONE)
+   {
+      if (save_empty)
+         config_set_string(conf, key, "nul");
+   }
+   else if (AXIS_NEG_GET(bind->joyaxis) != AXIS_DIR_NONE)
    {
       dir = '-';
       axis = AXIS_NEG_GET(bind->joyaxis);
@@ -17834,7 +17841,7 @@ static void save_keybind_axis(config_file_t *conf,
 static void save_keybind_mbutton(config_file_t *conf,
       const char *prefix,
       const char *base,
-      const struct retro_keybind *bind)
+      const struct retro_keybind *bind, bool save_empty)
 {
    char key[64];
 
@@ -17873,6 +17880,8 @@ static void save_keybind_mbutton(config_file_t *conf,
          config_set_string(conf, key, "whd");
          break;
       default:
+         if (save_empty)
+            config_set_string(conf, key, "nul");
          break;
    }
 }
@@ -17888,17 +17897,14 @@ static void save_keybind_mbutton(config_file_t *conf,
  * Save a key binding to the config file.
  */
 void input_config_save_keybind(void *data, const char *prefix,
-      const char *base, const struct retro_keybind *bind)
+      const char *base, const struct retro_keybind *bind,
+      bool save_empty)
 {
    config_file_t *conf = (config_file_t*)data;
 
-
+   save_keybind_joykey (conf, prefix, base, bind, save_empty);
-   if (bind->joykey != NO_BTN)
+   save_keybind_axis   (conf, prefix, base, bind, save_empty);
-      save_keybind_joykey(conf, prefix, base, bind);
+   save_keybind_mbutton(conf, prefix, base, bind, save_empty);
-   if (bind->joyaxis != AXIS_NONE)
-      save_keybind_axis(conf, prefix, base, bind);
-   if (bind->mbutton != NO_BTN)
-      save_keybind_mbutton(conf, prefix, base, bind);
 }
 
 /* MIDI */