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diff --git a/sbin/pdisk/bitfield.h b/sbin/pdisk/bitfield.h
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+//
+// bitfield.h - extract and set bit fields
+//
+// Written by Eryk Vershen (eryk@apple.com)
+//
+// Bitfields are not particularly transportable between big and little
+// endian machines.  Big endian machines lay out bitfields starting
+// from the most significant bit of the (one, two or four byte) number,
+// whereas little endian machines lay out bitfields starting from the
+// least signifcant bit.
+//
+// These routines were written to support some bitfields in a disk
+// data structure (partition map) whose original definition was on
+// a big-endian machine.
+//
+// They only work on 32-bit values because I didn't need 16-bit support.
+// The bits in the long word are numbered from 0 (least significant) to
+// 31 (most significant).
+//
+
+/*
+ * Copyright 1996,1998 by Apple Computer, Inc.
+ *              All Rights Reserved 
+ *  
+ * Permission to use, copy, modify, and distribute this software and 
+ * its documentation for any purpose and without fee is hereby granted, 
+ * provided that the above copyright notice appears in all copies and 
+ * that both the copyright notice and this permission notice appear in 
+ * supporting documentation. 
+ *  
+ * APPLE COMPUTER DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE 
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
+ * FOR A PARTICULAR PURPOSE. 
+ *  
+ * IN NO EVENT SHALL APPLE COMPUTER BE LIABLE FOR ANY SPECIAL, INDIRECT, OR 
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT, 
+ * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION 
+ * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 
+ */
+
+#ifndef __bitfield__
+#define __bitfield__
+
+
+//
+// Defines
+//
+
+
+//
+// Types
+//
+
+
+//
+// Global Constants
+//
+
+
+//
+// Global Variables
+//
+
+
+//
+// Forward declarations
+//
+unsigned long bitfield_set(unsigned long *bf, int base, int length, unsigned long value);
+unsigned long bitfield_get(unsigned long bf, int base, int length);
+
+#endif /* __bitfield__ */