Factor Sector out into its own header. Sketch out Geometry.

lib/sector.h

@@ -0,0 +1,34 @@
+#ifndef SECTOR_H
+#define SECTOR_H
+
+/* 
+ * Note that sectors here used zero-based numbering throughout (to make the
+ * maths easier); traditionally floppy disk use 0-based track numbering and
+ * 1-based sector numbering, which makes no sense.
+ */
+class Sector
+{
+public:
+	enum
+	{
+		OK,
+		BAD_CHECKSUM
+	};
+
+    Sector(int status, int track, int side, int sector, const std::vector<uint8_t>& data):
+		status(status),
+        track(track),
+        side(side),
+        sector(sector),
+        data(data)
+    {}
+
+	const int status;
+    const int track;
+    const int side;
+    const int sector;
+    const std::vector<uint8_t> data;
+};
+
+#endif
+