Implement system.GetSaveFolderName()

cg.c

@@ -114,32 +114,26 @@ struct cg *cg_load(int no)
 	//  size is only pixel data size
 	switch(type) {
 	case ALCG_VSP:
-		sys_message("extracting VSP");
 		cg = vsp_extract(dfile->data);
 		size = cg->width * cg->height;
 		break;
 	case ALCG_PMS8:
-		sys_message("extracting PMS8");
 		cg = pms256_extract(dfile->data);
 		size = cg->width * cg->height;
 		break;
 	case ALCG_PMS16:
-		sys_message("extracting PMS16");
 		cg = pms64k_extract(dfile->data);
 		size = (cg->width * cg->height) * sizeof(uint16_t);
 		break;
 	case ALCG_BMP8:
-		sys_message("extracting BMP8");
 		cg = bmp256_extract(dfile->data);
 		size = cg->width * cg->height;
 		break;
 	case ALCG_BMP24:
-		sys_message("extracting BMP24");
 		cg = bmp16m_extract(dfile->data);
 		size = (cg->width * cg->height) * sizeof(uint16_t);
 		break;
 	case ALCG_QNT:
-		sys_message("extracting QNT");
 		cg = qnt_extract(dfile->data);
 		size = (cg->width * cg->height) * 3;
 		break;

system4.c

@@ -28,6 +28,7 @@
 struct config config = {
 	.game_name = NULL,
 	.ain_filename = NULL,
+	.save_dir = NULL,
 	.view_width = 800,
 	.view_height = 600
 };
@@ -52,6 +53,8 @@ static int config_handler(void *user, possibly_unused const char *section, const
 		config->game_name = config_strdup(value);
 	} else if (!strcmp(name, "CodeName")) {
 		config->ain_filename = config_strdup(value);
+	} else if (!strcmp(name, "SaveFolder")) {
+		config->save_dir = config_strdup(value);
 	} else if (!strcmp(name, "ViewWidth")) {
 		config->view_width = atoi(value);
 	} else if (!strcmp(name, "ViewHeight")) {

system4.h

@@ -72,6 +72,7 @@ mem_alloc char *_xstrdup(const char *in, const char *func);
 struct config {
 	char *game_name;
 	char *ain_filename;
+	char *save_dir;
 	int view_width;
 	int view_height;
 };

vm.c

@@ -362,6 +362,12 @@ static void system_call(int32_t code)
 		free(utf);
 		// XXX: caller S_POPs
 		break;
+	case 0xC:
+		if (config.save_dir)
+			stack_push_string(make_string(config.save_dir, strlen(config.save_dir)));
+		else
+			stack_push_string(string_ref(&EMPTY_STRING));
+		break;
 	case 0xD:
 		stack_push(vm_time());
 		break;