note
	description: "Facility routines to check the validity of DATEs"
	legal: "See notice at end of class."
	status: "See notice at end of class."
	date: "$Date: 2009-01-01 12:38:30 +0000 (Thu, 01 Jan 2009) $"
	revision: "$Revision: 76534 $"

class interface
	DATE_VALIDITY_CHECKER

create 
	default_create

feature -- Preconditions

	date_valid (s: STRING_8; code_string: STRING_8): BOOLEAN
			-- Is the code_string enough precise
			-- To create an instance of type DATE
			-- And does the string s correspond to code_string?
		require
			s_exists: s /= Void
			code_exists: code_string /= Void

	date_valid_with_base (s: STRING_8; code_string: STRING_8; base: INTEGER_32): BOOLEAN
			-- Is the code_string enough precise
			-- To create an instance of type DATE
			-- And does the string s correspond to code_string?
			-- Use base century base.
		require
			s_exists: s /= Void
			code_exists: code_string /= Void
			base_valid: base > 0 and (base \\ 100 = 0)

	date_valid_default (s: STRING_8): BOOLEAN
			-- Is the code_string enough precise
			-- To create an instance of type DATE
			-- And does the string s correspond to
			-- date_default_format_string?
		require
			s_exists: s /= Void

	date_valid_default_with_base (s: STRING_8; base: INTEGER_32): BOOLEAN
			-- Is the code_string enough precise
			-- To create an instance of type DATE
			-- And does the string s correspond to
			-- date_default_format_string?
			-- Use base century base.
		require
			s_exists: s /= Void
			base_valid: base > 0 and (base \\ 100 = 0)

	compact_date_valid (c_d: INTEGER_32): BOOLEAN
			-- Is compact date c_d valid?

	ordered_compact_date_valid (c_d: INTEGER_32): BOOLEAN
			-- Is compact date c_d valid?

	is_correct_date (y, m, d: INTEGER_32): BOOLEAN
			-- Is date specified by y, m, and d a correct date?
	
note
	copyright: "Copyright (c) 1984-2009, Eiffel Software and others"
	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
	source: "[
		Eiffel Software
		5949 Hollister Ave., Goleta, CA 93117 USA
		Telephone 805-685-1006, Fax 805-685-6869
		Website http://www.eiffel.com
		Customer support http://support.eiffel.com
	]"

end -- class DATE_VALIDITY_CHECKER

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