From 5344e3098bbd6ec4ad87ae3eb1d5724990bf124c Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Sun, 20 Aug 2017 10:55:08 -0400
Subject: [PATCH] Minor: made has_disk something that is decided on
 insertion/deletion.

---
 Storage/Disk/Drive.cpp | 6 ++++--
 Storage/Disk/Drive.hpp | 1 +
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/Storage/Disk/Drive.cpp b/Storage/Disk/Drive.cpp
index b8124dc90..99e8e6d11 100644
--- a/Storage/Disk/Drive.cpp
+++ b/Storage/Disk/Drive.cpp
@@ -12,20 +12,22 @@
 using namespace Storage::Disk;
 
 Drive::Drive()
-	: head_position_(0), head_(0) {}
+	: head_position_(0), head_(0), has_disk_(false) {}
 
 void Drive::set_disk(const std::shared_ptr<Disk> &disk) {
 	disk_ = disk;
 	track_ = nullptr;
+	has_disk_ = !!disk_;
 }
 
 void Drive::set_disk_with_track(const std::shared_ptr<Track> &track) {
 	disk_ = nullptr;
 	track_ = track;
+	has_disk_ = !!track_;
 }
 
 bool Drive::has_disk() {
-	return (bool)disk_ || (bool)track_;
+	return has_disk_;
 }
 
 bool Drive::get_is_track_zero() {
diff --git a/Storage/Disk/Drive.hpp b/Storage/Disk/Drive.hpp
index d65cb5435..009b15dc9 100644
--- a/Storage/Disk/Drive.hpp
+++ b/Storage/Disk/Drive.hpp
@@ -73,6 +73,7 @@ class Drive {
 	private:
 		std::shared_ptr<Track> track_;
 		std::shared_ptr<Disk> disk_;
+		bool has_disk_;
 		int head_position_;
 		unsigned int head_;
 };