The Wolfenstein 3D source as originally released.

WOLFSRC/ID_HEAD.H

@@ -0,0 +1,34 @@
+// ID_HEAD.H
+
+
+#define	EXTENSION	"WLF"
+#define WOLF
+
+#define	TEXTGR	0
+#define	CGAGR	1
+#define	EGAGR	2
+#define	VGAGR	3
+
+#define GRMODE	VGAGR
+
+#include "VERSION.H"
+
+typedef	enum	{false,true}	boolean;
+typedef	unsigned	char		byte;
+typedef	unsigned	int			word;
+typedef	unsigned	long		longword;
+typedef	byte *					Ptr;
+
+typedef	struct
+		{
+			int	x,y;
+		} Point;
+
+typedef	struct
+		{
+			Point	ul,lr;
+		} Rect;
+
+
+void	Quit (char *error);		// defined in user program
+