From 54d0e32bced43dc3d85b41e30bcb1fa430ae90dc Mon Sep 17 00:00:00 2001
From: cflip <cflip@cflip.net>
Date: Wed, 11 Jan 2023 11:34:19 -0700
Subject: Use the new error function with the new window and font code

---
 error.c  |  8 ++++++--
 error.h  |  2 +-
 font.c   | 11 +++++------
 window.c | 20 +++++++-------------
 4 files changed, 19 insertions(+), 22 deletions(-)

diff --git a/error.c b/error.c
index 4944ff4..e42bae1 100644
--- a/error.c
+++ b/error.c
@@ -1,11 +1,15 @@
 #include "error.h"
 
+#include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 
-void fatal_error(const char *msg)
+void fatal_error(const char *msgfmt, ...)
 {
-	perror(msg);
+	va_list args;
+	va_start(args, msgfmt);
+	vfprintf(stderr, msgfmt, args);
+	va_end(args);
 	exit(-1);
 }
 
diff --git a/error.h b/error.h
index f30fd24..1a8f350 100644
--- a/error.h
+++ b/error.h
@@ -1,7 +1,7 @@
 #ifndef _ERROR_H
 #define ERROR_H
 
-void fatal_error(const char *msg);
+void fatal_error(const char *msgfmt, ...);
 void warning(const char *msg);
 
 #endif
diff --git a/font.c b/font.c
index e2c1a74..c1d1e7a 100644
--- a/font.c
+++ b/font.c
@@ -31,9 +31,9 @@ SDL_Texture *font_create_texture(SDL_Renderer *renderer, PSFFont *font)
 	}
 
 	result = SDL_CreateTextureFromSurface(renderer, surface);
-	if (result == NULL) {
-		fprintf(stderr, "Failed to create texture: %s\n", SDL_GetError());
-	}
+	if (result == NULL)
+		fatal_error("Failed to create texture: %s\n", SDL_GetError());
+
 	SDL_FreeSurface(surface);
 
 	printf("Created font texture atlas of size %dx%d\n", surface->w, surface->h);
@@ -51,9 +51,8 @@ PSFFont font_load(const char *filename)
 	fseek(fp, 0, SEEK_SET);
 
 	fread(&font.magic, 4, 1, fp);
-	if (font.magic != PSF_MAGIC_NUMBER) {
-		printf("%x: Font '%s' header does not contain expected value.\n", font.magic, filename);
-	}
+	if (font.magic != PSF_MAGIC_NUMBER)
+		fatal_error("Font header mismatch! '%s' has magic value %x.\n", filename, font.magic);
 
 	fread(&font.version, 4, 1, fp);
 	fread(&font.header_size, 4, 1, fp);
diff --git a/window.c b/window.c
index 219c0ca..b87188d 100644
--- a/window.c
+++ b/window.c
@@ -4,6 +4,7 @@
 
 #include "buffer.h"
 #include "editor.h"
+#include "error.h"
 #include "font.h"
 #include "input.h"
 
@@ -15,27 +16,20 @@ static PSFFont font;
 
 void window_init(const char *title, int rows, int cols)
 {
-	/* TODO: There should be a 'panic' method of sorts to be reused here. */
-	if (SDL_Init(SDL_INIT_VIDEO) != 0) {
-		fprintf(stderr, "Failed to initalize SDL: %s\n", SDL_GetError());
-		return;
-	}
+	if (SDL_Init(SDL_INIT_VIDEO) != 0)
+		fatal_error("Failed to init SDL: %s\n", SDL_GetError());
 
 	font = font_load("terminus/ter-u12n.psf");
 	int window_width = cols * font.width;
 	int window_height = rows * font.height;
 
 	window = SDL_CreateWindow(title, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, window_width, window_height, 0);
-	if (window == NULL) {
-		fprintf(stderr, "Failed to create a window: %s\n", SDL_GetError());
-		return;
-	}
+	if (window == NULL)
+		fatal_error("Failed to create window: %s\n", SDL_GetError());
 
 	renderer = SDL_CreateRenderer(window, -1, 0);
-	if (renderer == NULL) {
-		fprintf(stderr, "Failed to create a renderer: %s\n", SDL_GetError());
-		return;
-	}
+	if (renderer == NULL)
+		fatal_error("Failed to create renderer: %s\n", SDL_GetError());
 
 	font_texture = font_create_texture(renderer, &font);
 
-- 
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