From c6cbd3bccc171918e95c629d591a9d1e7c2d7c97 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Thu, 18 Mar 2021 10:39:09 -0400
Subject: main: Refactor into functions

---
(limited to 'src')

diff --git a/src/main.c b/src/main.c
index d64caae..d772449 100644
--- a/src/main.c
+++ b/src/main.c
@@ -26,68 +26,102 @@
 #include "game.h"
 #include "output.h"
 
-int
-main(int argc, char *argv[])
+static void
+_db_find_dirs(char *program_name,
+		const char **games_dir, const char **fonts_dir)
 {
-	char            *program_dir;
-	const char      *games_dir;
-	const char      *fonts_dir;
-	SDL_Window      *window;
-	SDL_Renderer    *renderer;
-	SDL_Texture     *texture;
-	struct db_game **games;
-	int              n;
-	int              i;
+	char *program_dir;
 
-	/* Find data directories */
-	program_dir = realpath(dirname(argv[0]), NULL);
+	program_dir = realpath(dirname(program_name), NULL);
 	if (strcmp(program_dir, ABS_BUILDDIR) == 0) {
 		/* Running in place */
-		games_dir = ABS_BUILDDIR "/games";
-		fonts_dir = ABS_BUILDDIR "/fonts";
+		*games_dir = ABS_BUILDDIR "/games";
+		*fonts_dir = ABS_BUILDDIR "/fonts";
 	} else {
 		/* Running from installation */
-		games_dir = GAMESDIR;
-		fonts_dir = FONTSDIR;
+		*games_dir = GAMESDIR;
+		*fonts_dir = FONTSDIR;
 	}
 	free(program_dir);
+}
 
-	/* Initialize SDL libraries */
+static int
+_db_init(SDL_Window **window, SDL_Renderer **renderer, SDL_Texture **texture)
+{
 	if (SDL_Init(SDL_INIT_VIDEO) < 0) {
 		db_err("Failed to initialize SDL (%s)", SDL_GetError());
-		return EXIT_FAILURE;
+		return -1;
 	}
+
 	if (TTF_Init() < 0) {
 		db_err("Failed to initialize SDL_ttf (%s)", TTF_GetError());
-		return EXIT_FAILURE;
+		return -1;
 	}
-	window = SDL_CreateWindow("Dodge Balls",
+
+	*window = SDL_CreateWindow("Dodge Balls",
 			SDL_WINDOWPOS_UNDEFINED,
 			SDL_WINDOWPOS_UNDEFINED,
 			640, 480, 0);
-	if (window == NULL) {
+	if (*window == NULL) {
 		db_err("Failed to create window (%s)", SDL_GetError());
 		SDL_Quit();
-		return EXIT_FAILURE;
+		return -1;
 	}
-	renderer = SDL_CreateRenderer(window, -1, 0);
-	if (renderer == NULL) {
+
+	*renderer = SDL_CreateRenderer(*window, -1, 0);
+	if (*renderer == NULL) {
 		db_err("Failed to create renderer (%s)", SDL_GetError());
-		SDL_DestroyWindow(window);
+		SDL_DestroyWindow(*window);
 		SDL_Quit();
-		return EXIT_FAILURE;
+		return -1;
 	}
-	texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888,
+
+	*texture = SDL_CreateTexture(*renderer, SDL_PIXELFORMAT_ARGB8888,
 			SDL_TEXTUREACCESS_TARGET, 640, 480);
-	if (texture == NULL) {
+	if (*texture == NULL) {
 		db_err("Failed to create texture (%s)", SDL_GetError());
-		SDL_DestroyRenderer(renderer);
-		SDL_DestroyWindow(window);
+		SDL_DestroyRenderer(*renderer);
+		SDL_DestroyWindow(*window);
 		SDL_Quit();
-		return EXIT_FAILURE;
+		return -1;
 	}
+
 	SDL_DisableScreenSaver();
 
+	return 0;
+}
+
+static void
+_db_quit(SDL_Window *window, SDL_Renderer *renderer, SDL_Texture *texture)
+{
+	SDL_EnableScreenSaver();
+	SDL_DestroyTexture(texture);
+	SDL_DestroyRenderer(renderer);
+	SDL_DestroyWindow(window);
+	TTF_Quit();
+	SDL_Quit();
+}
+
+int
+main(int argc, char *argv[])
+{
+	const char      *games_dir;
+	const char      *fonts_dir;
+	SDL_Window      *window;
+	SDL_Renderer    *renderer;
+	SDL_Texture     *texture;
+	struct db_game **games;
+	int              n;
+	int              i;
+
+	/* Find data directories */
+	_db_find_dirs(argv[0], &games_dir, &fonts_dir);
+
+	/* Initialize SDL libraries */
+	if (_db_init(&window, &renderer, &texture) < 0) {
+		return EXIT_FAILURE;
+	}
+
 	/* Find games */
 	n = db_games_find(games_dir, &games);
 	if (n > 0) {
@@ -106,12 +140,7 @@ main(int argc, char *argv[])
 	SDL_Delay(1000);
 
 	/* Quit SDL libraries */
-	SDL_EnableScreenSaver();
-	SDL_DestroyTexture(texture);
-	SDL_DestroyRenderer(renderer);
-	SDL_DestroyWindow(window);
-	TTF_Quit();
-	SDL_Quit();
+	_db_quit(window, renderer, texture);
 
 	return EXIT_SUCCESS;
 }
--
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