From 490f17e9bf7940f0e09eac66ff3c5a8d536f3624 Mon Sep 17 00:00:00 2001
From: neonloop
Date: Thu, 12 Aug 2021 15:34:52 +0000
Subject: Allows deleting game-specific config from menu

---
 main.c | 21 ++++++++++++++++++++-
 main.h |  2 ++
 menu.c | 24 ++++++++++++++++++++++--
 3 files changed, 44 insertions(+), 3 deletions(-)

diff --git a/main.c b/main.c
index 9cd0696..b3998db 100644
--- a/main.c
+++ b/main.c
@@ -22,6 +22,7 @@ bool should_quit = false;
 unsigned current_audio_buffer_size;
 char core_name[MAX_PATH];
 char* content_path;
+int config_override = 0;
 
 static uint32_t vsyncs;
 static uint32_t renders;
@@ -126,6 +127,10 @@ int save_config(int is_game)
 	config_write_keys(config_file);
 
 	fclose(config_file);
+
+	if (is_game)
+		config_override = 1;
+
 	return 0;
 }
 
@@ -136,7 +141,9 @@ static void alloc_config_buffer(char **config_ptr) {
 
 	config_file_name(config_filename, MAX_PATH, 1);
 	config_file = fopen(config_filename, "rb");
-	if (!config_file) {
+	if (config_file) {
+		config_override = 1;
+	} else {
 		config_file_name(config_filename, MAX_PATH, 0);
 		config_file = fopen(config_filename, "rb");
 	}
@@ -191,6 +198,18 @@ static void load_config_keys(void)
 	}
 }
 
+int remove_config(int is_game) {
+	char config_filename[MAX_PATH];
+	int ret;
+
+	config_file_name(config_filename, MAX_PATH, is_game);
+	ret = remove(config_filename);
+	if (ret == 0)
+		config_override = 0;
+
+	return ret;
+}
+
 void handle_emu_action(emu_action action)
 {
 	static emu_action prev_action = EACTION_NONE;
diff --git a/main.h b/main.h
index 3d0a13c..146db02 100644
--- a/main.h
+++ b/main.h
@@ -22,6 +22,7 @@ extern bool should_quit;
 extern unsigned current_audio_buffer_size;
 extern char core_name[MAX_PATH];
 extern char* content_path;
+extern int config_override;
 
 #ifdef MMENU
 extern void* mmenu;
@@ -55,6 +56,7 @@ static inline bool has_suffix_i(const char *str, const char *suffix) {
 void set_defaults(void);
 int save_config(int is_game);
 void load_config(void);
+int remove_config(int is_game);
 
 void handle_emu_action(emu_action action);
 void pa_log(enum retro_log_level level, const char *fmt, ...);
diff --git a/menu.c b/menu.c
index e691f16..880dde5 100644
--- a/menu.c
+++ b/menu.c
@@ -23,6 +23,7 @@ typedef enum
 	MA_MAIN_EXIT,
 	MA_OPT_SAVECFG,
 	MA_OPT_SAVECFG_GAME,
+	MA_OPT_RMCFG_GAME,
 	MA_CTRL_PLAYER1,
 	MA_CTRL_EMU,
 } menu_id;
@@ -175,6 +176,16 @@ static int mh_savecfg(int id, int keys)
 	return 1;
 }
 
+static int mh_rmcfg(int id, int keys)
+{
+	if (remove_config(id == MA_OPT_RMCFG_GAME ? 1 : 0) == 0)
+		menu_update_msg("config removed");
+	else
+		menu_update_msg("failed to remove config");
+
+	return 1;
+}
+
 static int menu_loop_core_options_page(int offset, int keys) {
 	static int sel = 0;
 	menu_entry *e_menu_core_options;
@@ -235,8 +246,9 @@ static int menu_loop_core_options(int id, int keys)
 	return menu_loop_core_options_page(0, keys);
 }
 
-static const char h_restore_def[]     = "Switches back to default / recommended\n"
-	"configuration";
+static const char h_rm_config_game[]  = "Removes game-specific config file";
+
+static const char h_restore_def[]     = "Switches back to default settings";
 
 static const char h_show_fps[]        = "Shows frames and vsyncs per second";
 
@@ -325,17 +337,25 @@ static int menu_loop_keyconfig(int id, int keys)
 	return 0;
 }
 
+const char *config_label(int id, int *offs) {
+	return config_override ? "Loaded: game config" : "Loaded: global config";
+}
+
 static menu_entry e_menu_config_options[] =
 {
 	mee_cust_nosave  ("Save global config",       MA_OPT_SAVECFG,      mh_savecfg, mgn_saveloadcfg),
 	mee_cust_nosave  ("Save game config",         MA_OPT_SAVECFG_GAME, mh_savecfg, mgn_saveloadcfg),
+	mee_handler_id_h ("Delete game config",       MA_OPT_RMCFG_GAME,   mh_rmcfg,   h_rm_config_game),
 	mee_handler_h    ("Restore defaults",         mh_restore_defaults, h_restore_def),
+	mee_label        (""),
+	mee_label_mk     (0,                          config_label),
 	mee_end,
 };
 
 static int menu_loop_config_options(int id, int keys)
 {
 	static int sel = 0;
+	me_enable(e_menu_config_options, MA_OPT_RMCFG_GAME, config_override == 1);
 
 	me_loop(e_menu_config_options, &sel);
 
-- 
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