indexing
	description: "Wrapper of FILETIME structure"
	author: "Marina Nudelman"
	date: "$Date$"
	revision: "$Revision$"

class interface
	WEL_FILE_TIME

create 

	make
			-- Allocate item
			-- (from WEL_STRUCTURE)
		ensure -- from WEL_STRUCTURE
			not_shared: not shared

	make_by_pointer (a_pointer: POINTER)
			-- Set item with a_pointer.
			-- Since item is shared, it does not need
			-- to be freed.
			-- Caution: a_pointer must be a pointer
			-- coming from Windows.
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			item_set: item = a_pointer
			shared: shared

	make_by_current_time
			-- Create FILETIME structure and initialize it
			-- to current universal time.
		ensure
			initialized: item /= default_pointer

	make_by_file_access_time (a_file: FILE)
			-- Create FILETIME structure and initialize
			-- it to universal access time of file a_file
		require
			non_void_file: a_file /= void
		ensure
			initialized: item /= default_pointer

	make_by_file_modification_time (a_file: FILE)
			-- Create FILETIME structure and initialize
			-- it to universal modification time of file a_file
		require
			non_void_file: a_file /= void
		ensure
			initialized: item /= default_pointer

	make_by_file_creation_time (a_file: FILE)
			-- Create FILETIME structure and initialize
			-- it to universal creation time of file a_file
		require
			non_void_file: a_file /= void
		ensure
			initialized: item /= default_pointer

feature -- Access

	item: POINTER
			-- Generic Windows handle or structure pointer.
			-- Can be a HWND, HICON, RECT *, WNDCLASS *, etc...
			-- (from WEL_ANY)
	
feature -- Measurement

	structure_size: INTEGER
			-- Size of FILETIME structure
		ensure -- from WEL_STRUCTURE
			positive_result: Result > 0
	
feature -- Status report

	exists: BOOLEAN
			-- Does the item exist?
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			Result = (item /= default_pointer)

	shared: BOOLEAN
			-- Is item shared by another object?
			-- If False (by default), item will
			-- be destroyed by destroy_item.
			-- If True, item will not be destroyed.
			-- (from WEL_ANY)
	
feature -- Status setting

	set_shared
			-- Set shared to True.
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			shared: shared

	set_unshared
			-- Set shared to False.
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			unshared: not shared
	
feature -- Removal

	dispose
			-- Destroy the inner structure of Current.
			--
			-- This function should be called by the GC when the
			-- object is collected or by the user if Current is
			-- no more usefull.
			-- (from WEL_ANY)
	
feature -- Conversion

	local_file_time: WEL_FILE_TIME
			-- universal FILETIME in local FILETIME form
			-- Current must be in universal time form

	system_time: WEL_SYSTEM_TIME
			-- FILETIME in SYSTEMTIME format

	to_integer: INTEGER
			-- Converts item to an integer.
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			Result = cwel_pointer_to_integer (item)

	universal_file_time: WEL_FILE_TIME
			-- local FILETIME in universal FILETIME form
			-- Current must be in local time form
	
feature -- Basic operations

	initialize
			-- Fill Current with zeros.
			-- (from WEL_STRUCTURE)
		require -- from WEL_STRUCTURE
			exists: exists

	initialize_with_character (a_character: CHARACTER)
			-- Fill current with a_character.
			-- (from WEL_STRUCTURE)
		require -- from WEL_STRUCTURE
			exists: exists

	is_equal (a_file_time: WEL_FILE_TIME): BOOLEAN
			-- is a_file_time equal to Current?
		require -- from ANY
			other_not_void: other /= void
		ensure -- from ANY
			symmetric: Result implies other.is_equal (Current)
			consistent: standard_is_equal (other) implies Result

	is_larger_than (a_file_time: WEL_FILE_TIME): BOOLEAN
			-- is Current larger than a_file_time?
		require
			non_default_item: item /= default_pointer

	memory_copy (source_pointer: POINTER; length: INTEGER)
			-- Copy length bytes from source_pointer to item.
			-- (from WEL_STRUCTURE)
		require -- from WEL_STRUCTURE
			length_small_enough: length <= structure_size
			length_large_enough: length > 0
			exists: exists
	
invariant

		-- from ANY
	reflexive_equality: standard_is_equal (Current)
	reflexive_conformance: conforms_to (Current)

end -- class WEL_FILE_TIME