[GTK3] Load and save ROM specific files

We now handle loading and saving of:
– Save files
– Cheats files
– Symbol files

Makefile

@@ -439,6 +439,10 @@ gtk3/resources/Shaders/%.fsh: Shaders/%.fsh
 	-@$(MKDIR) -p gtk3/resources/gtk3/resources/Shaders/
 	cp -rf $< gtk3/resources/$@
 
+gtk3/resources/Misc/%: Misc/%
+	-@$(MKDIR) -p gtk3/resources/gtk3/resources/Misc/
+	cp -rf $< gtk3/resources/$@
+
 # Boot ROMs
 
 $(OBJ)/%.2bpp: %.png

gtk3/main.c

@@ -6,6 +6,9 @@
 #include <stdbool.h>
 #include <stdio.h>
 #include <string.h>
+
+// TODO: right now we need access to GB_debugger_add_symbol
+#define GB_INTERNAL
 #include <Core/gb.h>
 
 #include "settings.h"
@@ -53,6 +56,9 @@ typedef struct GuiData {
 	GFile *file;
 	gint sample_rate;
 
+	char *battery_save_path;
+	char *cheats_save_path;
+
 	GB_model_t prev_model;
 
 	const GThread *main_thread;
@@ -202,6 +208,23 @@ static const GActionEntry app_entries[] = {
 	{ "change_model", NULL, "s", "@s 'CGB'", on_model_changed },
 };
 
+static void replace_extension(const char *src, size_t length, char *dest, const char *ext) {
+	memcpy(dest, src, length);
+	dest[length] = 0;
+
+	/* Remove extension */
+	for (size_t i = length; i--;) {
+		if (dest[i] == '/') break;
+		if (dest[i] == '.') {
+			dest[i] = 0;
+			break;
+		}
+	}
+
+	/* Add new extension */
+	strcat(dest, ext);
+}
+
 static uint32_t rgb_encode(GB_gameboy_t *gb, uint8_t r, uint8_t g, uint8_t b) {
 	return 0xFF000000 | (r << 16) | (g << 8) | b;
 }
@@ -1266,6 +1289,45 @@ static void reset(void) {
 			g_warning("Failed to load ROM: %s", path);
 		}
 
+		GB_load_battery(&gb, gui_data.battery_save_path);
+		GB_load_cheats(&gb, gui_data.cheats_save_path);
+
+		// TODO: Implement without GB_INTERNAL
+		/* GB_debugger_load_symbol_file */ {
+			GError *error = NULL;
+			GInputStream *stream = g_resources_open_stream(RESOURCE_PREFIX "Misc/registers.sym", G_RESOURCE_LOOKUP_FLAGS_NONE, &error);
+			GDataInputStream *input_stream = g_data_input_stream_new(stream);
+			
+			char *line = NULL;
+			gsize length = 0;
+
+			while ((line = g_data_input_stream_read_line_utf8(input_stream, &length, NULL, &error))) {
+				// skip comments
+				for (unsigned i = 0; i < length; i++) {
+					if (line[i] == ';') {
+						line[i] = 0;
+						length = i;
+						break;
+					}
+				}
+				if (length == 0) continue;
+
+				unsigned bank, address;
+				char symbol[length];
+
+				if (sscanf(line, "%x:%x %s", &bank, &address, symbol) == 3) {
+					GB_debugger_add_symbol(&gb, bank, address, symbol);
+				}
+			}
+
+			g_object_unref(stream);
+		}
+
+		size_t path_length = strlen(path);
+		char sym_file_path[path_length + 5];
+		replace_extension(path, path_length, sym_file_path, ".sym");
+		GB_debugger_load_symbol_file(&gb, sym_file_path);
+
 		g_free(path);
 	}
 
@@ -1301,6 +1363,11 @@ static void start(void) {
 		}
 	}
 
+	if (gui_data.file) {
+		GB_save_battery(&gb, gui_data.battery_save_path);
+		GB_save_cheats(&gb, gui_data.cheats_save_path);
+	}
+
 	gui_data.stopping = false;
 }
 
@@ -1322,6 +1389,19 @@ static void activate_reset(GSimpleAction *action, GVariant *parameter, gpointer
 static gpointer run_thread(gpointer null_ptr) {
 	if (!gui_data.file) return NULL;
 
+	char *path = g_file_get_path(gui_data.file);
+	size_t path_length = strlen(path);
+	
+	/* At the worst case, size is strlen(path) + 4 bytes for .sav + NULL */
+	char battery_save_path[path_length + 5];
+	char cheats_save_path[path_length + 5];
+
+	replace_extension(path, path_length, battery_save_path, ".sav");
+	replace_extension(path, path_length, cheats_save_path, ".cht");
+
+	gui_data.battery_save_path = battery_save_path;
+	gui_data.cheats_save_path  = cheats_save_path;
+
 	if (gui_data.stopped) {
 		start();
 	}

gtk3/sameboy.gresource.xml

@@ -42,6 +42,8 @@
 		<file compressed="true" alias="Shaders/Scale4x.fsh">gtk3/resources/Shaders/Scale4x.fsh</file>
 		<file compressed="true" alias="Shaders/SmoothBilinear.fsh">gtk3/resources/Shaders/SmoothBilinear.fsh</file>
 
+		<file compressed="true" alias="Misc/registers.sym">gtk3/resources/Misc/registers.sym</file>
+
 		<file>pixmaps/CPU.png</file>
 		<file>pixmaps/Display.png</file>
 		<file>pixmaps/Joypad.png</file>