indexing
	description: "Bit operations on integer (or, and not)."
	status: "See notice at end of class."
	date: "$Date$"
	revision: "$Revision$"

class
	WEL_BIT_OPERATIONS

feature -- Basic operations

	set_flag (flags, mask: INTEGER): INTEGER is
			-- Set the `mask' in `flags'
		do
			Result := flags | mask
		ensure
			flag_set: flag_set (Result, mask)
		end

	clear_flag (flags, mask: INTEGER): INTEGER is
			-- Clear the `mask' in `flags'
		do
			Result := flags & mask.bit_not
		ensure
			flag_unset: not flag_set (Result, mask)
		end

feature -- Status report

	flag_set (flags, mask: INTEGER): BOOLEAN is
			-- Is `mask' set in `flags'?
		do
			Result := (flags & mask) = mask
		end

end -- class WEL_BIT_OPERATIONS

--|----------------------------------------------------------------
--| Windows Eiffel Library: library of reusable components for ISE Eiffel.
--| Copyright (C) 1985-2004 Eiffel Software. All rights reserved.
--| Duplication and distribution prohibited.  May be used only with
--| ISE Eiffel, under terms of user license.
--| Contact Eiffel Software for any other use.
--|
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--| dba Eiffel Software
--| 356 Storke Road, Goleta, CA 93117 USA
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--| Contact us at: http://www.eiffel.com/general/email.html
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--| For latest info on our award winning products, visit:
--|	http://www.eiffel.com
--|----------------------------------------------------------------