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	description: "[
		Commonly used console input and output mechanisms. 
		This class may be used as ancestor by classes needing its facilities.
	]"
	status: "See notice at end of class"
	date: "$Date: 2001-11-16 20:32:23 +0000 (Fri, 16 Nov 2001) $"
	revision: "$Revision: 51435 $"

class 
	CONSOLE

create {STD_FILES}
	make_open_stdin,
	make_open_stdout,
	make_open_stderr

feature -- Initialization

	make_open_stderr (fn: STRING) is
			-- Create an unix standard error file.
		do
			make (fn)
			file_pointer := console_def (2)
			set_write_mode
		end

	make_open_stdin (fn: STRING) is
			-- Create an unix standard input file.
		require -- from FILE
			string_exists: fn /= void
			string_not_empty: not fn.is_empty
		do
			make (fn)
			file_pointer := console_def (0)
			set_read_mode
			create last_string.make (256)
		ensure -- from FILE
			exists: exists
			open_read: is_open_read
		end

	make_open_stdout (fn: STRING) is
			-- Create an unix standard output file.
		require -- from FILE
			string_exists: fn /= void
			string_not_empty: not fn.is_empty
		do
			make (fn)
			file_pointer := console_def (1)
			set_write_mode
		ensure -- from FILE
			exists: exists
			open_write: is_open_write
		end
	
feature {NONE} -- Initialization

	make (fn: STRING) is
			-- Create file object with fn as file name.
			-- (from FILE)
		require -- from FILE
			string_exists: fn /= void
			string_not_empty: not fn.is_empty
		do
			name := fn
			mode := closed_file
			create last_string.make (256)
		ensure -- from FILE
			file_named: name.is_equal (fn)
			file_closed: is_closed
		end

	make_create_read_write (fn: STRING) is
			-- Create file object with fn as file name
			-- and open file for both reading and writing;
			-- create it if it does not exist.
			-- (from FILE)
		require -- from FILE
			string_exists: fn /= void
			string_not_empty: not fn.is_empty
		do
			make (fn)
			create_read_write
		ensure -- from FILE
			exists: exists
			open_read: is_open_read
			open_write: is_open_write
		end

	make_open_append (fn: STRING) is
			-- Create file object with fn as file name
			-- and open file in append-only mode.
			-- (from FILE)
		require -- from FILE
			string_exists: fn /= void
			string_not_empty: not fn.is_empty
		do
			make (fn)
			open_append
		ensure -- from FILE
			exists: exists
			open_append: is_open_append
		end

	make_open_read_append (fn: STRING) is
			-- Create file object with fn as file name
			-- and open file for reading anywhere
			-- but writing at the end only.
			-- Create file if it does not exist.
			-- (from FILE)
		require -- from FILE
			string_exists: fn /= void
			string_not_empty: not fn.is_empty
		do
			make (fn)
			open_read_append
		ensure -- from FILE
			exists: exists
			open_read: is_open_read
			open_append: is_open_append
		end

	make_open_read_write (fn: STRING) is
			-- Create file object with fn as file name
			-- and open file for both reading and writing.
			-- (from FILE)
		require -- from FILE
			string_exists: fn /= void
			string_not_empty: not fn.is_empty
		do
			make (fn)
			open_read_write
		ensure -- from FILE
			exists: exists
			open_read: is_open_read
			open_write: is_open_write
		end
	
feature {NONE} -- Access

	access_date: INTEGER is
			-- Time stamp of last access made to the inode.
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.access_date
		end

	C_memory: INTEGER is 2
			-- Code for the C memory managed
			-- by the garbage collector
			-- (from MEM_CONST)

	date: INTEGER is
			-- Time stamp (time of last modification)
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.date
		end

	descriptor: INTEGER is
			-- File descriptor as used by the operating system.
			-- (from FILE)
		require -- from IO_MEDIUM
			valid_handle: descriptor_available
		require else -- from FILE
			file_opened: not is_closed
		do
			Result := file_fd (file_pointer)
			descriptor_available := True
		end

	descriptor_available: BOOLEAN
			-- (from FILE)

	Eiffel_memory: INTEGER is 1
			-- Code for the Eiffel memory managed
			-- by the garbage collector
			-- (from MEM_CONST)

	file_info: UNIX_FILE_INFO is
			-- Collected information about the file.
			-- (from FILE)
		do
			set_buffer
			Result := clone (buffered_file_info)
		end

	Full_collector: INTEGER is 0
			-- Statistics for full collections
			-- (from MEM_CONST)

	group_id: INTEGER is
			-- Group identification of owner
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.group_id
		end

	has (v: like item): BOOLEAN is
			-- Does structure include an occurrence of v?
			-- (Reference or object equality,
			-- based on object_comparison.)
			-- (from LINEAR)
		do
			start
			if not off then
				search (v)
			end
			Result := not exhausted
		ensure -- from CONTAINER
			not_found_in_empty: Result implies not is_empty
		end

	Incremental_collector: INTEGER is 1
			-- Statistics for incremental collections
			-- (from MEM_CONST)

	index_of (v: like item; i: INTEGER): INTEGER is
			-- Index of i-th occurrence of v.
			-- 0 if none.
			-- (Reference or object equality,
			-- based on object_comparison.)
			-- (from LINEAR)
		require -- from LINEAR
			positive_occurrences: i > 0
		local
			occur, pos: INTEGER
		do
			if object_comparison and v /= void then
				from
					start
					pos := 1
				until
					off or (occur = i)
				loop
					if item /= void and then v.is_equal (item) then
						occur := occur + 1
					end
					forth
					pos := pos + 1
				end
			else
				from
					start
					pos := 1
				until
					off or (occur = i)
				loop
					if item = v then
						occur := occur + 1
					end
					forth
					pos := pos + 1
				end
			end
			if occur = i then
				Result := pos - 1
			end
		ensure -- from LINEAR
			non_negative_result: Result >= 0
		end

	inode: INTEGER is
			-- I-node number
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.inode
		end

	item: CHARACTER is
			-- Current item
			-- (from FILE)
		require -- from TRAVERSABLE
			not_off: not off
		require -- from ACTIVE
			readable: readable
		do
			read_character
			Result := last_character
			back
		end

	links: INTEGER is
			-- Number of links on file
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.links
		end

	name: STRING
			-- File name
			-- (from FILE)

	occurrences (v: CHARACTER): INTEGER is
			-- Number of times v appears.
			-- (Reference or object equality,
			-- based on object_comparison.)
			-- (from LINEAR)
		do
			from
				start
				search (v)
			until
				exhausted
			loop
				Result := Result + 1
				forth
				search (v)
			end
		ensure -- from BAG
			non_negative_occurrences: Result >= 0
		end

	owner_name: STRING is
			-- Name of owner
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.owner_name
		end

	position: INTEGER is
			-- Current cursor position.
			-- (from FILE)
		do
			if not is_closed then
				Result := file_tell (file_pointer)
			end
		end

	protection: INTEGER is
			-- Protection mode, in decimal value
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.protection
		end

	retrieved: ANY is
			-- Retrieved object structure
			-- To access resulting object under correct type,
			-- use assignment attempt.
			-- Will raise an exception (code Retrieve_exception)
			-- if content is not a stored Eiffel structure.
			-- (from FILE)
		require -- from IO_MEDIUM
			exists: exists
			is_open_read: is_open_read
			support_storable: support_storable
		do
			Result := c_retrieved (descriptor)
		ensure -- from IO_MEDIUM
			result_exists: Result /= void
		end

	sequential_search (v: like item) is
			-- Move to first position (at or after current
			-- position) where item and v are equal.
			-- (Reference or object equality,
			-- based on object_comparison.)
			-- If no such position ensure that exhausted will be true.
			-- (from LINEAR)
		do
			if object_comparison and v /= void then
				from
				until
					exhausted or else (item /= void and then v.is_equal (item))
				loop
					forth
				end
			else
				from
				until
					exhausted or else v = item
				loop
					forth
				end
			end
		ensure -- from LINEAR
			object_found: (not exhausted and object_comparison) implies equal (v, item)
			item_found: (not exhausted and not object_comparison) implies v = item
		end

	Total_memory: INTEGER is 0
			-- Code for all the memory managed
			-- by the garbage collector
			-- (from MEM_CONST)

	user_id: INTEGER is
			-- User identification of owner
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.user_id
		end
	
feature  -- Access

	file_pointer: POINTER
			-- File pointer as required in C
			-- (from FILE)

	separator: CHARACTER
			-- ASCII code of character following last word read
			-- (from FILE)
	
feature {NONE} -- Measurement

	gc_statistics (collector_type: INTEGER): GC_INFO is
			-- Garbage collection information for collector_type.
			-- (from MEMORY)
		require -- from MEMORY
			type_ok: collector_type = full_collector or collector_type = incremental_collector
		do
			create Result.make (collector_type)
		end

	memory_statistics (memory_type: INTEGER): MEM_INFO is
			-- Memory usage information for memory_type
			-- (from MEMORY)
		require -- from MEMORY
			type_ok: memory_type = total_memory or memory_type = eiffel_memory or memory_type = c_memory
		do
			create Result.make (memory_type)
		end
	
feature -- Status report

	end_of_file: BOOLEAN is
			-- Have we reached the end of file?
		require -- from FILE
			opened: not is_closed
		do
			Result := console_eof (file_pointer)
		end

	exists: BOOLEAN is
			-- Does file exist?
		do
			Result := True
		ensure then -- from FILE
			unchanged_mode: mode = old mode
		end
	
feature {NONE} -- Status report

	access_exists: BOOLEAN is
			-- Does physical file exist?
			-- (Uses real UID.)
			-- (from FILE)
		local
			external_name: ANY
		do
			external_name := name.to_c
			Result := file_access ($external_name, 0)
		end

	after: BOOLEAN is
			-- Is there no valid cursor position to the right of cursor position?
			-- (from FILE)
		do
			Result := not is_closed and then (end_of_file or count = 0)
		end

	before: BOOLEAN is
			-- Is there no valid cursor position to the left of cursor position?
			-- (from FILE)
		do
			Result := is_closed
		end

	changeable_comparison_criterion: BOOLEAN is
			-- May object_comparison be changed?
			-- (Answer: yes by default.)
			-- (from CONTAINER)
		do
			Result := True
		end

	chunk_size: INTEGER is
			-- Minimal size of a memory chunk. The run-time always
			-- allocates a multiple of this size.
			-- If the environment variable EIF_MEMORY_CHUNK
			-- is defined, it is set to the closest reasonable
			-- value from it.
			-- (from MEMORY)
		external
			"C | %"eif_memory.h%""
		alias
			"eif_get_chunk_size"
		end

	coalesce_period: INTEGER is
			-- Period of full coalesce (in number of collections)
			-- If the environment variable EIF_FULL_COALESCE_PERIOD
			-- is defined, it is set to the closest reasonable
			-- value from it.
			-- If null, no full coalescing is launched.
			-- (from MEMORY)
		external
			"C | %"eif_memory.h%""
		alias
			"eif_coalesce_period"
		end

	collecting: BOOLEAN is
			-- Is garbage collection enabled?
			-- (from MEMORY)
		external
			"C | %"eif_memory.h%""
		alias
			"gc_ison"
		end

	collection_period: INTEGER is
			-- Period of full collection.
			-- If the environment variable EIF_FULL_COLLECTION_PERIOD
			-- is defined, it is set to the closest reasonable
			-- value from it.
			-- If null, no full collection is launched.
			-- (from MEMORY)
		external
			"C | %"eif_memory.h%""
		alias
			"mem_pget"
		end

	empty: BOOLEAN is
		obsolete "ELKS 2000: Use `is_empty' instead"
			-- Is there no element?
			-- (from CONTAINER)
		do
			Result := is_empty
		end

	exhausted: BOOLEAN is
			-- Has structure been completely explored?
			-- (from LINEAR)
		do
			Result := off
		ensure -- from LINEAR
			exhausted_when_off: off implies Result
		end

	extendible: BOOLEAN is
			-- May new items be added?
			-- (from FILE)
		do
			Result := mode >= write_file
		end

	file_prunable: BOOLEAN is
			-- May items be removed?
			-- (from FILE)
		do
			Result := mode >= write_file and prunable
		end

	file_writable: BOOLEAN is
			-- Is there a current item that may be modified?
			-- (from FILE)
		do
			Result := mode >= write_file
		end

	Full: BOOLEAN is False
			-- Is structure filled to capacity?
			-- (from FILE)

	generation_object_limit: INTEGER is
			-- Maximum size of object in generational scavenge zone.
			-- If the environment variable EIF_GS_LIMIT
			-- is defined, it is set to the closest reasonable
			-- value from it.
			-- (from MEMORY)
		external
			"C | %"eif_memory.h%""
		alias
			"eif_generation_object_limit"
		end

	is_access_executable: BOOLEAN is
			-- Is file executable by real UID?
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_access_executable
		end

	is_access_owner: BOOLEAN is
			-- Is file owned by real UID?
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_access_owner
		end

	is_access_readable: BOOLEAN is
			-- Is file readable by real UID?
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_access_readable
		end

	is_access_writable: BOOLEAN is
			-- Is file writable by real UID?
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_access_writable
		end

	is_block: BOOLEAN is
			-- Is file a block special file?
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_block
		end

	is_character: BOOLEAN is
			-- Is file a character special file?
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_character
		end

	is_closed: BOOLEAN is
			-- Is file closed?
			-- (from FILE)
		do
			Result := mode = closed_file
		end

	is_creatable: BOOLEAN is
			-- Is file creatable in parent directory?
			-- (Uses effective UID to check that parent is writable
			-- and file does not exist.)
			-- (from FILE)
		local
			external_name: ANY
		do
			external_name := name.to_c
			Result := file_creatable ($external_name)
		end

	is_device: BOOLEAN is
			-- Is file a device?
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_device
		end

	is_directory: BOOLEAN is
			-- Is file a directory?
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_directory
		end

	is_executable: BOOLEAN is
			-- Is file executable?
			-- (Checks execute permission for effective UID.)
			-- (from FILE)
		require -- from IO_MEDIUM
			handle_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_executable
		end

	is_fifo: BOOLEAN is
			-- Is file a named pipe?
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_fifo
		end

	is_inserted (v: CHARACTER): BOOLEAN is
			-- Has v been inserted by the most recent insertion?
			-- (By default, the value returned is equivalent to calling
			-- `has (v)'. However, descendants might be able to provide more
			-- efficient implementations.)
			-- (from COLLECTION)
		do
			Result := has (v)
		end

	is_open_append: BOOLEAN is
			-- Is file open for appending?
			-- (from FILE)
		do
			Result := mode = append_file or else mode = append_read_file
		end

	is_open_read: BOOLEAN is
			-- Is file open for reading?
			-- (from FILE)
		do
			Result := mode = read_file or else mode = read_write_file or else mode = append_read_file
		end

	is_open_write: BOOLEAN is
			-- Is file open for writing?
			-- (from FILE)
		do
			Result := mode = write_file or else mode = read_write_file or else mode = append_read_file or else mode = append_file
		end

	is_owner: BOOLEAN is
			-- Is file owned by effective UID?
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_owner
		end

	is_plain: BOOLEAN is
			-- Is file a plain file?
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_plain
		end

	is_plain_text: BOOLEAN is
			-- Is file reserved for text (character sequences)? (Yes)
			-- (from PLAIN_TEXT_FILE)
		do
			Result := True
		end

	is_readable: BOOLEAN is
			-- Is file readable?
			-- (Checks permission for effective UID.)
			-- (from FILE)
		require -- from IO_MEDIUM
			handle_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_readable
		end

	is_setgid: BOOLEAN is
			-- Is file setgid?
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_setgid
		end

	is_setuid: BOOLEAN is
			-- Is file setuid?
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_setuid
		end

	is_socket: BOOLEAN is
			-- Is file a named socket?
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_socket
		end

	is_sticky: BOOLEAN is
			-- Is file sticky (for memory swaps)?
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_sticky
		end

	is_symlink: BOOLEAN is
			-- Is file a symbolic link?
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_symlink
		end

	is_writable: BOOLEAN is
			-- Is file writable?
			-- (Checks write permission for effective UID.)
			-- (from FILE)
		require -- from IO_MEDIUM
			handle_exists: exists
		do
			set_buffer
			Result := buffered_file_info.is_writable
		end

	largest_coalesced_block: INTEGER is
			-- Size of largest coalesced block since last call to
			-- largest_coalesced; 0 if none.
			-- (from MEMORY)
		external
			"C | %"eif_memory.h%""
		alias
			"mem_largest"
		end

	max_mem: INTEGER is
			-- Maximum amount of bytes the run-time can allocate.
			-- (from MEMORY)
		external
			"C | %"eif_memory.h%""
		alias
			"eif_get_max_mem"
		end

	memory_threshold: INTEGER is
			-- Minimum amount of bytes to be allocated before
			-- starting an automatic garbage collection.
			-- (from MEMORY)
		external
			"C | %"eif_memory.h%""
		alias
			"mem_tget"
		end

	object_comparison: BOOLEAN
			-- Must search operations use equal rather than =
			-- for comparing references? (Default: no, use =.)
			-- (from CONTAINER)

	off: BOOLEAN is
			-- Is there no item?
			-- (from FILE)
		do
			Result := (count = 0) or else is_closed or else end_of_file
		end

	readable: BOOLEAN is
			-- Is there a current item that may be read?
			-- (from SEQUENCE)
		require -- from  ACTIVE
			True
		require -- from IO_MEDIUM
			handle_exists: exists
		do
			Result := not off
		end

	referers (an_object: ANY): ARRAY [ANY] is
			-- Objects that refer to an_object.
			-- (from MEMORY)
		local
			a: ANY
		do
			create Result.make (0, 200)
			a := Result.area
			find_referers ($an_object, $a, Result.count)
		end

	scavenge_zone_size: INTEGER is
			-- Size of generational scavenge zone.
			-- If the environment variable EIF_MEMORY_SCAVENGE
			-- is defined, it is set to the closest reasonable
			-- value from it.
			-- (from MEMORY)
		external
			"C | %"eif_memory.h%""
		alias
			"eif_scavenge_zone_size"
		end

	Support_storable: BOOLEAN is False
			-- Can medium be used to store an Eiffel structure?
			-- (from PLAIN_TEXT_FILE)

	tenure: INTEGER is
			-- Maximum age of object before being considered
			-- as old (old objects are not scanned during
			-- partial collection).
			-- If the environment variable EIF_TENURE_MAX
			-- is defined, it is set to the closest reasonable
			-- value from it.
			-- (from MEMORY)
		external
			"C | %"eif_memory.h%""
		alias
			"eif_tenure"
		end

	writable: BOOLEAN is
			-- Is there a current item that may be modified?
			-- (from SEQUENCE)
		do
			Result := not off
		end
	
feature  -- Status report

	file_readable: BOOLEAN is
			-- Is there a current item that may be read?
			-- (from FILE)
		do
			Result := (mode >= read_write_file or mode = read_file) and readable
		end

	last_character: CHARACTER
			-- Last character read by read_character
			-- (from IO_MEDIUM)

	last_double: DOUBLE
			-- Last double read by read_double
			-- (from IO_MEDIUM)

	last_integer: INTEGER
			-- Last integer read by read_integer
			-- (from IO_MEDIUM)

	last_real: REAL
			-- Last real read by read_real
			-- (from IO_MEDIUM)

	last_string: STRING
			-- Last string read
			-- (from IO_MEDIUM)
	
feature {NONE} -- Status setting

	allocate_compact is
			-- Enter `memory' mode: will try to compact memory
			-- before requesting more from the operating system.
			-- (from MEMORY)
		external
			"C | %"eif_memory.h%""
		alias
			"mem_slow"
		end

	allocate_fast is
			-- Enter `speed' mode: will optimize speed of memory
			-- allocation rather than memory usage.
			-- (from MEMORY)
		external
			"C | %"eif_memory.h%""
		alias
			"mem_speed"
		end

	allocate_tiny is
			-- Enter `tiny' mode: will enter `memory' mode
			-- after having freed as much memory as possible.
			-- (from MEMORY)
		external
			"C | %"eif_memory.h%""
		alias
			"mem_tiny"
		end

	close is
			-- Close file.
			-- (from FILE)
		require -- from IO_MEDIUM
			medium_is_open: not is_closed
		do
			file_close (file_pointer)
			mode := closed_file
			descriptor_available := False
		ensure then -- from FILE
			is_closed: is_closed
		end

	collection_off is
			-- Disable garbage collection.
			-- (from MEMORY)
		external
			"C | %"eif_garcol.h%""
		alias
			"gc_stop"
		end

	collection_on is
			-- Enable garbage collection.
			-- (from MEMORY)
		external
			"C | %"eif_garcol.h%""
		alias
			"gc_run"
		end

	compare_objects is
			-- Ensure that future search operations will use equal
			-- rather than = for comparing references.
			-- (from CONTAINER)
		require -- from CONTAINER
			changeable_comparison_criterion
		do
			object_comparison := True
		ensure -- from CONTAINER
			object_comparison
		end

	compare_references is
			-- Ensure that future search operations will use =
			-- rather than equal for comparing references.
			-- (from CONTAINER)
		require -- from CONTAINER
			changeable_comparison_criterion
		do
			object_comparison := False
		ensure -- from CONTAINER
			reference_comparison: not object_comparison
		end

	create_read_write is
			-- Open file in read and write mode;
			-- create it if it does not exist.
			-- (from FILE)
		require -- from FILE
			is_closed: is_closed
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_pointer := file_open ($external_name, 4)
			mode := read_write_file
		ensure -- from FILE
			exists: exists
			open_read: is_open_read
			open_write: is_open_write
		end

	disable_time_accounting is
			-- Disable GC time accounting (default).
			-- (from MEMORY)
		do
			gc_monitoring (False)
		end

	enable_time_accounting is
			-- Enable GC time accouting, accessible in gc_statistics.
			-- (from MEMORY)
		do
			gc_monitoring (True)
		end

	fd_open_append (fd: INTEGER) is
			-- Open file of descriptor fd in append mode.
			-- (from FILE)
		do
			file_pointer := file_dopen (fd, 2)
			mode := append_file
		ensure -- from FILE
			exists: exists
			open_append: is_open_append
		end

	fd_open_read (fd: INTEGER) is
			-- Open file of descriptor fd in read-only mode.
			-- (from FILE)
		do
			file_pointer := file_dopen (fd, 0)
			mode := read_file
		ensure -- from FILE
			exists: exists
			open_read: is_open_read
		end

	fd_open_read_append (fd: INTEGER) is
			-- Open file of descriptor fd
			-- in read and write-at-end mode.
			-- (from FILE)
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_pointer := file_dopen (fd, 5)
			mode := append_read_file
		ensure -- from FILE
			exists: exists
			open_read: is_open_read
			open_append: is_open_append
		end

	fd_open_read_write (fd: INTEGER) is
			-- Open file of descriptor fd in read-write mode.
			-- (from FILE)
		do
			file_pointer := file_dopen (fd, 3)
			mode := read_write_file
		ensure -- from FILE
			exists: exists
			open_read: is_open_read
			open_write: is_open_write
		end

	fd_open_write (fd: INTEGER) is
			-- Open file of descriptor fd in write mode.
			-- (from FILE)
		do
			file_pointer := file_dopen (fd, 1)
			mode := write_file
		ensure -- from FILE
			exists: exists
			open_write: is_open_write
		end

	open_append is
			-- Open file in append-only mode;
			-- create it if it does not exist.
			-- (from FILE)
		require -- from FILE
			is_closed: is_closed
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_pointer := file_open ($external_name, 2)
			mode := append_file
		ensure -- from FILE
			exists: exists
			open_append: is_open_append
		end

	open_read is
			-- Open file in read-only mode.
			-- (from FILE)
		require -- from FILE
			is_closed: is_closed
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_pointer := file_open ($external_name, 0)
			mode := read_file
		ensure -- from FILE
			exists: exists
			open_read: is_open_read
		end

	open_read_append is
			-- Open file in read and write-at-end mode;
			-- create it if it does not exist.
			-- (from FILE)
		require -- from FILE
			is_closed: is_closed
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_pointer := file_open ($external_name, 5)
			mode := append_read_file
		ensure -- from FILE
			exists: exists
			open_read: is_open_read
			open_append: is_open_append
		end

	open_read_write is
			-- Open file in read and write mode.
			-- (from FILE)
		require -- from FILE
			is_closed: is_closed
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_pointer := file_open ($external_name, 3)
			mode := read_write_file
		ensure -- from FILE
			exists: exists
			open_read: is_open_read
			open_write: is_open_write
		end

	open_write is
			-- Open file in write-only mode;
			-- create it if it does not exist.
			-- (from FILE)
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_pointer := file_open ($external_name, 1)
			mode := write_file
		ensure -- from FILE
			exists: exists
			open_write: is_open_write
		end

	recreate_read_write (fname: STRING) is
			-- Reopen in read-write mode with file of name fname;
			-- create file if it does not exist.
			-- (from FILE)
		require -- from FILE
			is_open: not is_closed
			valid_name: fname /= void
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_pointer := file_reopen ($external_name, 4, file_pointer)
			name := fname
			mode := read_write_file
		ensure -- from FILE
			exists: exists
			open_read: is_open_read
			open_write: is_open_write
		end

	reopen_append (fname: STRING) is
			-- Reopen in append mode with file of name fname;
			-- create file if it does not exist.
			-- (from FILE)
		require -- from FILE
			is_open: not is_closed
			valid_name: fname /= void
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_pointer := file_reopen ($external_name, 2, file_pointer)
			name := fname
			mode := append_file
		ensure -- from FILE
			exists: exists
			open_append: is_open_append
		end

	reopen_read (fname: STRING) is
			-- Reopen in read-only mode with file of name fname;
			-- create file if it does not exist.
			-- (from FILE)
		require -- from FILE
			is_open: not is_closed
			valid_name: fname /= void
		local
			external_name: ANY
		do
			external_name := fname.to_c
			file_pointer := file_reopen ($external_name, 0, file_pointer)
			name := fname
			mode := read_file
		ensure -- from FILE
			exists: exists
			open_read: is_open_read
		end

	reopen_read_append (fname: STRING) is
			-- Reopen in read and write-at-end mode with file
			-- of name fname; create file if it does not exist.
			-- (from FILE)
		require -- from FILE
			is_open: not is_closed
			valid_name: fname /= void
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_pointer := file_reopen ($external_name, 5, file_pointer)
			name := fname
			mode := append_read_file
		ensure -- from FILE
			exists: exists
			open_read: is_open_read
			open_append: is_open_append
		end

	reopen_read_write (fname: STRING) is
			-- Reopen in read-write mode with file of name fname.
			-- (from FILE)
		require -- from FILE
			is_open: not is_closed
			valid_name: fname /= void
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_pointer := file_reopen ($external_name, 3, file_pointer)
			name := fname
			mode := read_write_file
		ensure -- from FILE
			exists: exists
			open_read: is_open_read
			open_write: is_open_write
		end

	reopen_write (fname: STRING) is
			-- Reopen in write-only mode with file of name fname;
			-- create file if it does not exist.
			-- (from FILE)
		require -- from FILE
			is_open: not is_closed
			valid_name: fname /= void
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_pointer := file_reopen ($external_name, 1, file_pointer)
			name := fname
			mode := write_file
		ensure -- from FILE
			exists: exists
			open_write: is_open_write
		end

	set_coalesce_period (value: INTEGER) is
			-- Set coalesce_period. Every value collection,
			-- the Garbage Collector will coalesce
			-- the whole memory.
			-- (from MEMORY)
		require -- from MEMORY
			positive_value: value >= 0
		external
			"C | %"eif_memory.h%""
		alias
			"eif_set_coalesce_period"
		end

	set_collection_period (value: INTEGER) is
			-- Set collection_period. Every value collection,
			-- the Garbage collector will perform a collection
			-- on the whole memory (full collection), otherwise
			-- a simple partial collection is done.
			-- (from MEMORY)
		require -- from MEMORY
			positive_value: value >= 0
		external
			"C | %"eif_memory.h%""
		alias
			"mem_pset"
		end

	set_max_mem (value: INTEGER) is
			-- Set the maximum amount of memory the run-time can allocate.
			-- (from MEMORY)
		require -- from MEMORY
			positive_value: value > 0
		external
			"C | %"eif_memory.h%""
		alias
			"eif_set_max_mem"
		end

	set_memory_threshold (value: INTEGER) is
			-- Set a new memory_threshold in bytes. Whenever the memory
			-- allocated for Eiffel reaches this value, an automatic
			-- collection is performed.
			-- (from MEMORY)
		require -- from MEMORY
			positive_value: value > 0
		external
			"C | %"eif_memory.h%""
		alias
			"mem_tset"
		end
	
feature {NONE} -- Cursor movement

	back is
			-- Go back one position.
			-- (from FILE)
		require -- from BILINEAR
			not_before: not before
		do
			file_move (file_pointer, - 1)
		end

	finish is
			-- Go to last position.
			-- (from FILE)
		require -- from  LINEAR
			True
		require else -- from FILE
			file_opened: not is_closed
		do
			file_recede (file_pointer, 0)
		end

	forth is
			-- Go to next position.
			-- (from FILE)
		require -- from LINEAR
			not_after: not after
		require else -- from FILE
			file_opened: not is_closed
		do
			file_move (file_pointer, 1)
		end

	go (abs_position: INTEGER) is
			-- Go to the absolute position.
			-- (New position may be beyond physical length.)
			-- (from FILE)
		require -- from FILE
			file_opened: not is_closed
			non_negative_argument: abs_position >= 0
		do
			file_go (file_pointer, abs_position)
		end

	move (offset: INTEGER) is
			-- Advance by offset from current location.
			-- (from FILE)
		require -- from FILE
			file_opened: not is_closed
		do
			file_move (file_pointer, offset)
		end

	recede (abs_position: INTEGER) is
			-- Go to the absolute position backwards,
			-- starting from end of file.
			-- (from FILE)
		require -- from FILE
			file_opened: not is_closed
			non_negative_argument: abs_position >= 0
		do
			file_recede (file_pointer, abs_position)
		end

	search (v: like item) is
			-- Move to first position (at or after current
			-- position) where item and v are equal.
			-- If structure does not include v ensure that
			-- exhausted will be true.
			-- (Reference or object equality,
			-- based on object_comparison.)
			-- (from BILINEAR)
		do
			if before and not is_empty then
				forth
			end
			sequential_search (v)
		ensure -- from LINEAR
			object_found: (not exhausted and object_comparison) implies equal (v, item)
			item_found: (not exhausted and not object_comparison) implies v = item
		end

	start is
			-- Go to first position.
			-- (from FILE)
		require -- from  TRAVERSABLE
			True
		require else -- from FILE
			file_opened: not is_closed
		do
			file_go (file_pointer, 0)
		end
	
feature {NONE} -- Element change

	add_permission (who, what: STRING) is
			-- Add read, write, execute or setuid permission
			-- for who ('u', 'g' or 'o') to what.
			-- (from FILE)
		require -- from FILE
			who_is_not_void: who /= void
			what_is_not_void: what /= void
			file_descriptor_exists: exists
		local
			external_name, ext_who, ext_what: ANY
		do
			external_name := name.to_c
			ext_who := who.to_c
			ext_what := what.to_c
			file_perm ($external_name, $ext_who, $ext_what, 1)
		end

	basic_store (object: ANY) is
			-- Produce an external representation of the
			-- entire object structure reachable from object.
			-- Retrievable within current system only.
			-- (from FILE)
		require -- from IO_MEDIUM
			object_not_void: object /= void
			exists: exists
			is_open_write: is_open_write
			support_storable: support_storable
		do
			c_basic_store (descriptor, $object)
		end

	change_date: INTEGER is
			-- Time stamp of last change.
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			set_buffer
			Result := buffered_file_info.change_date
		end

	change_group (new_group_id: INTEGER) is
			-- Change group of file to new_group_id found in
			-- system password file.
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_chgrp ($external_name, new_group_id)
		end

	change_mode (mask: INTEGER) is
			-- Replace mode by mask.
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_chmod ($external_name, mask)
		end

	change_name (new_name: STRING) is
			-- Change file name to new_name
			-- (from FILE)
		require -- from FILE
			new_name_not_void: new_name /= void
			file_exists: exists
		local
			ext_old_name, ext_new_name: ANY
		do
			ext_old_name := name.to_c
			ext_new_name := new_name.to_c
			file_rename ($ext_old_name, $ext_new_name)
			name := new_name
		ensure -- from FILE
			name_changed: name.is_equal (new_name)
		end

	change_owner (new_owner_id: INTEGER) is
			-- Change owner of file to new_owner_id found in
			-- system password file. On some systems this
			-- requires super-user privileges.
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_chown ($external_name, new_owner_id)
		end

	extend (v: CHARACTER) is
			-- Include v at end.
			-- (from FILE)
		require -- from COLLECTION
			extendible: extendible
		do
			put_character (v)
		ensure -- from COLLECTION
			item_inserted: is_inserted (v)
		ensure then -- from BAG
			one_more_occurrence: occurrences (v) = old (occurrences (v)) + 1
		end

	fill (other: CONTAINER [CHARACTER]) is
			-- Fill with as many items of other as possible.
			-- The representations of other and current structure
			-- need not be the same.
			-- (from COLLECTION)
		require -- from COLLECTION
			other_not_void: other /= void
			extendible
		local
			lin_rep: LINEAR [CHARACTER]
		do
			lin_rep := other.linear_representation
			from
				lin_rep.start
			until
				not extendible or else lin_rep.off
			loop
				extend (lin_rep.item)
				lin_rep.forth
			end
		end

	flush is
			-- Flush buffered data to disk.
			-- Note that there is no guarantee that the operating
			-- system will physically write the data to the disk.
			-- At least it will end up in the buffer cache,
			-- making the data visible to other processes.
			-- (from FILE)
		require -- from FILE
			is_open: not is_closed
		do
			file_flush (file_pointer)
		end

	force (v: like item) is
			-- Add v to end.
			-- (from SEQUENCE)
		require -- from SEQUENCE
			extendible: extendible
		do
			extend (v)
		ensure then -- from SEQUENCE
			new_count: count = old count + 1
			item_inserted: has (v)
		end

	general_store (object: ANY) is
			-- Produce an external representation of the
			-- entire object structure reachable from object.
			-- Retrievable from other systems for same platform
			-- (machine architecture).
			-- (from FILE)
		require -- from IO_MEDIUM
			object_not_void: object /= void
			exists: exists
			is_open_write: is_open_write
			support_storable: support_storable
		do
			c_general_store (descriptor, $object)
		end

	independent_store (object: ANY) is
			-- Produce an external representation of the
			-- entire object structure reachable from object.
			-- Retrievable from other systems for the same or other
			-- platform (machine architecture).
			-- (from FILE)
		require -- from IO_MEDIUM
			object_not_void: object /= void
			exists: exists
			is_open_write: is_open_write
			support_storable: support_storable
		do
			c_independent_store (descriptor, $object)
		end

	link (fn: STRING) is
			-- Link current file to fn.
			-- fn must not already exist.
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		local
			external_name: ANY
			fn_name: ANY
		do
			external_name := name.to_c
			fn_name := fn.to_c
			file_link ($external_name, $fn_name)
		end

	put (v: like item) is
			-- Add v to end.
			-- (from SEQUENCE)
		require -- from COLLECTION
			extendible: extendible
		do
			extend (v)
		ensure -- from COLLECTION
			item_inserted: is_inserted (v)
		ensure then -- from SEQUENCE
			new_count: count = old count + 1
		end

	remove_permission (who, what: STRING) is
			-- Remove read, write, execute or setuid permission
			-- for who ('u', 'g' or 'o') to what.
			-- (from FILE)
		require -- from FILE
			who_is_not_void: who /= void
			what_is_not_void: what /= void
			file_descriptor_exists: exists
		local
			external_name, ext_who, ext_what: ANY
		do
			external_name := name.to_c
			ext_who := who.to_c
			ext_what := what.to_c
			file_perm ($external_name, $ext_who, $ext_what, 0)
		end

	set_access (time: INTEGER) is
			-- Stamp with time (access only).
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_utime ($external_name, time, 0)
		ensure -- from FILE
			acess_date_updated: access_date = time
			date_unchanged: date = old date
		end

	set_date (time: INTEGER) is
			-- Stamp with time (modification time only).
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_utime ($external_name, time, 1)
		ensure -- from FILE
			access_date_unchanged: access_date = old access_date
			date_updated: date = time
		end

	stamp (time: INTEGER) is
			-- Stamp with time (for both access and modification).
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_utime ($external_name, time, 2)
		ensure -- from FILE
			date_updated: date = time
		end

	touch is
			-- Update time stamp (for both access and modification).
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_touch ($external_name)
		ensure -- from FILE
			date_changed: date /= old date
		end
	
feature  -- Element change

	append (f: like Current) is
			-- Append a copy of the contents of f.
			-- (from FILE)
		require -- from SEQUENCE
			argument_not_void: s /= void
		require else -- from FILE
			target_is_closed: is_closed
			source_is_closed: f.is_closed
		do
			open_append
			f.open_read
			file_append (file_pointer, f.file_pointer, f.count)
			close
			f.close
		ensure -- from SEQUENCE
			new_count: count >= old count
		ensure then -- from FILE
			new_count: count = old count + f.count
			files_closed: f.is_closed and is_closed
		end
	
feature -- Removal

	dispose is
			-- This is closed by the operating system at completion.
		do
		end
	
feature {NONE} -- Removal

	collect is
			-- Force a partial collection cycle if garbage
			-- collection is enabled; do nothing otherwise.
			-- (from MEMORY)
		external
			"C | %"eif_eiffel.h%""
		end

	delete is
			-- Remove link with physical file.
			-- File does not physically disappear from the disk
			-- until no more processes reference it.
			-- I/O operations on it are still possible.
			-- A directory must be empty to be deleted.
			-- (from FILE)
		require -- from FILE
			exists: exists
		local
			external_name: ANY
		do
			external_name := name.to_c
			file_unlink ($external_name)
		end

	free (object: ANY) is
			-- Free object, by-passing garbage collection.
			-- Erratic behavior will result if the object is still
			-- referenced.
			-- (from MEMORY)
		do
			mem_free ($object)
		end

	full_coalesce is
			-- Coalesce the whole memory: merge adjacent free
			-- blocks to reduce fragmentation. Useful, when
			-- a lot of memory is allocated with garbage collector off.
			-- (from MEMORY)
		external
			"C | %"eif_memory.h%""
		alias
			"mem_coalesc"
		end

	full_collect is
			-- Force a full collection cycle if garbage
			-- collection is enabled; do nothing otherwise.
			-- (from MEMORY)
		external
			"C | %"eif_garcol.h%""
		alias
			"plsc"
		end

	mem_free (addr: POINTER) is
			-- Free memory of object at addr.
			-- (Preferred interface is free.)
			-- (from MEMORY)
		external
			"C | %"eif_memory.h%""
		end

	prune_all (v: like item) is
			-- Remove all occurrences of v; go off.
			-- (from SEQUENCE)
		require -- from COLLECTION
			prunable
		do
			from
				start
			until
				exhausted
			loop
				search (v)
				if not exhausted then
					remove
				end
			end
		ensure -- from COLLECTION
			no_more_occurrences: not has (v)
		end

	reset (fn: STRING) is
			-- Change file name to fn and reset
			-- file descriptor and all information.
			-- (from FILE)
		require -- from FILE
			valid_file_name: fn /= void
		do
			name := fn
			if mode /= closed_file then
				close
			end
			last_integer := 0
			if last_string /= void then
				last_string.wipe_out
			end
			last_real := 0.0
			last_character := '%U'
			last_double := 0.0
		ensure -- from FILE
			file_renamed: name = fn
			file_closed: is_closed
		end

	wipe_out is
			-- Remove all items.
			-- (from FILE)
		require -- from COLLECTION
			prunable
		require else -- from FILE
			is_closed: is_closed
		do
			open_write
			close
		ensure -- from COLLECTION
			wiped_out: is_empty
		end
	
feature {NONE} -- Conversion

	linear_representation: LINEAR [CHARACTER] is
			-- Representation as a linear structure
			-- (from LINEAR)
		do
			Result := Current
		end
	
feature  -- Obsolete

	lastchar: CHARACTER is
			-- Last character read by read_character
			-- (from IO_MEDIUM)
		do
			Result := last_character
		end

	lastdouble: DOUBLE is
			-- Last double read by read_double
			-- (from IO_MEDIUM)
		do
			Result := last_double
		end

	lastint: INTEGER is
			-- Last integer read by read_integer
			-- (from IO_MEDIUM)
		do
			Result := last_integer
		end

	lastreal: REAL is
			-- Last real read by read_real
			-- (from IO_MEDIUM)
		do
			Result := last_real
		end

	laststring: STRING is
			-- Last string read
			-- (from IO_MEDIUM)
		do
			Result := last_string
		end
	
feature {NONE} -- Inapplicable

	Count: INTEGER is 1
			-- Useless for CONSOLE class.

	go_to (r: CURSOR) is
			-- Move to position marked r.
			-- (from FILE)
		do
		end

	Is_empty: BOOLEAN is False
			-- Useless for CONSOLE class.

	prunable: BOOLEAN is
			-- Is there an item to be removed?
			-- (from FILE)
		do
		end

	prune (v: like item) is
			-- Remove an occurrence of v if any.
			-- (from FILE)
		require -- from COLLECTION
			prunable: prunable
		require else -- from FILE
			prunable: file_prunable
		do
		ensure then -- from FILE
			count <= old count
		end

	remove is
			-- Remove current item.
			-- (from FILE)
		require -- from ACTIVE
			prunable: prunable
			writable: writable
		require else -- from FILE
			file_prunable: file_prunable
		do
		end

	replace (v: like item) is
			-- Replace current item by v.
			-- (from FILE)
		require -- from ACTIVE
			writable: writable
		require else -- from FILE
			is_writable: file_writable
		do
		ensure -- from ACTIVE
			item_replaced: item = v
		ensure then -- from FILE
			item = v
			count = old count
		end
	
feature {NONE} -- Implementation

	Append_file: INTEGER is 3
			-- (from FILE)

	Append_read_file: INTEGER is 5
			-- (from FILE)

	buffered_file_info: UNIX_FILE_INFO is
			-- Information about the file.
			-- (from FILE)
		once
			create Result.make
		end

	c_basic_store (file_handle: INTEGER; object: POINTER) is
			-- Store object structure reachable form current object
			-- in file pointer file_ptr.
			-- (from FILE)
		external
			"C | %"eif_store.h%""
		alias
			"estore"
		end

	c_general_store (file_handle: INTEGER; object: POINTER) is
			-- Store object structure reachable form current object
			-- in file pointer file_ptr.
			-- (from FILE)
		external
			"C | %"eif_store.h%""
		alias
			"eestore"
		end

	c_independent_store (file_handle: INTEGER; object: POINTER) is
			-- Store object structure reachable form current object
			-- in file pointer file_ptr.
			-- (from FILE)
		external
			"C | %"eif_store.h%""
		alias
			"sstore"
		end

	c_retrieved (file_handle: INTEGER): ANY is
			-- Object structured retrieved from file of pointer
			-- file_ptr
			-- (from FILE)
		external
			"C | %"eif_retrieve.h%""
		alias
			"eretrieve"
		end

	Closed_file: INTEGER is 0
			-- (from FILE)

	console_def (number: INTEGER): POINTER is
			-- Convert number to the corresponding
			-- file descriptor.
		external
			"C | %"eif_console.h%""
		end

	console_eof (file: POINTER): BOOLEAN is
		external
			"C (FILE *): EIF_BOOLEAN | %"eif_console.h%""
		end

	console_next_line (file: POINTER) is
			-- Move to next input line on standard input.
		external
			"C (FILE *) | %"eif_console.h%""
		end

	console_pc (file: POINTER; c: CHARACTER) is
			-- Write character c at end of file
		external
			"C (FILE *, EIF_CHARACTER) | %"eif_console.h%""
		end

	console_pd (file: POINTER; d: DOUBLE) is
			-- Write double d at end of file
		external
			"C (FILE *, EIF_DOUBLE) | %"eif_console.h%""
		end

	console_pi (file: POINTER; i: INTEGER) is
			-- Write integer i at end of file
		external
			"C (FILE *, EIF_INTEGER) | %"eif_console.h%""
		end

	console_pr (file: POINTER; r: REAL) is
			-- Write real r at end of file
		external
			"C (FILE *, EIF_REAL) | %"eif_console.h%""
		end

	console_ps (file: POINTER; s_name: POINTER; length: INTEGER) is
			-- Write string s at end of file
		external
			"C (FILE *, char *, EIF_INTEGER) | %"eif_console.h%""
		end

	console_readchar (file: POINTER): CHARACTER is
			-- Read a character from the console
		external
			"C (FILE *): EIF_CHARACTER | %"eif_console.h%""
		end

	console_readdouble (file: POINTER): DOUBLE is
			-- Read a double from the console
		external
			"C (FILE *): EIF_DOUBLE | %"eif_console.h%""
		end

	console_readint (file: POINTER): INTEGER is
			-- Read an integer from the console
		external
			"C (FILE *): EIF_INTEGER | %"eif_console.h%""
		end

	console_readline (file: POINTER; a_string: POINTER; length, begin: INTEGER): INTEGER is
			-- Read a stream from the console
		external
			"C (FILE *, char *, EIF_INTEGER, EIF_INTEGER): EIF_INTEGER | %"eif_console.h%""
		end

	console_readreal (file: POINTER): REAL is
			-- Read a real number from the console
		external
			"C (FILE *): EIF_REAL | %"eif_console.h%""
		end

	console_readstream (file: POINTER; a_string: POINTER; length: INTEGER): INTEGER is
			-- Read a stream from the console
		external
			"C (FILE *, char *, EIF_INTEGER): EIF_INTEGER | %"eif_console.h%""
		end

	console_readword (file: POINTER; a_string: POINTER; length, begin: INTEGER): INTEGER is
			-- Read a string excluding white space and stripping
			-- leading white space from file into a_string.
			-- White space characters are: blank, new_line,
			-- tab, vertical tab, formfeed or end of file.
			-- If it does not fit, result is length - begin + 1,
			-- otherwise result is number of characters read.
		external
			"C (FILE *, char *, EIF_INTEGER, EIF_INTEGER): EIF_INTEGER | %"eif_console.h%""
		end

	console_separator (file: POINTER): CHARACTER is
			-- ASCII code of character following last word read
		external
			"C (FILE *): EIF_CHARACTER | %"eif_console.h%""
		end

	console_tnwl (file: POINTER) is
			-- Write a new_line to file
		external
			"C (FILE *) | %"eif_console.h%""
		end

	false_string: STRING is
			-- Character string "false"
			-- (from FILE)
		once
			Result := "False"
		end

	file_access (f_name: POINTER; which: INTEGER): BOOLEAN is
			-- Perform access test which on f_name using real UID.
			-- (from FILE)
		external
			"C | %"eif_file.h%""
		end

	file_append (file, from_file: POINTER; length: INTEGER) is
			-- Append a copy of from_file to file
			-- (from FILE)
		external
			"C (FILE *, FILE *, EIF_INTEGER) | %"eif_file.h%""
		end

	file_chgrp (f_name: POINTER; new_group: INTEGER) is
			-- Change group of f_name to new_group
			-- (from FILE)
		external
			"C | %"eif_file.h%""
		end

	file_chmod (f_name: POINTER; mask: INTEGER) is
			-- Change mode of f_name to mask.
			-- (from FILE)
		external
			"C | %"eif_file.h%""
		end

	file_chown (f_name: POINTER; new_owner: INTEGER) is
			-- Change owner of f_name to new_owner
			-- (from FILE)
		external
			"C | %"eif_file.h%""
		end

	file_close (file: POINTER) is
			-- Close file
		external
			"C (FILE *) | %"eif_console.h%""
		alias
			"console_file_close"
		end

	file_creatable (f_name: POINTER): BOOLEAN is
			-- Is f_name creatable.
			-- (from FILE)
		external
			"C | %"eif_file.h%""
		end

	file_dopen (fd, how: INTEGER): POINTER is
			-- File pointer for file of descriptor fd in mode how
			-- (which must fit the way fd was obtained).
			-- (from FILE)
		external
			"C | %"eif_file.h%""
		end

	file_exists (f_name: POINTER): BOOLEAN is
			-- Does f_name exist.
			-- (from FILE)
		external
			"C | %"eif_file.h%""
		end

	file_fd (file: POINTER): INTEGER is
			-- Operating system's file descriptor
			-- (from FILE)
		external
			"C (FILE *): EIF_INTEGER | %"eif_file.h%""
		end

	file_feof (file: POINTER): BOOLEAN is
			-- End of file?
			-- (from FILE)
		external
			"C (FILE *): EIF_BOOLEAN | %"eif_file.h%""
		end

	file_flush (file: POINTER) is
			-- Flush file.
			-- (from FILE)
		external
			"C (FILE *) | %"eif_file.h%""
		end

	file_gc (file: POINTER): CHARACTER is
			-- Access the next character
			-- (from FILE)
		external
			"C (FILE *): EIF_CHARACTER | %"eif_file.h%""
		end

	file_gd (file: POINTER): DOUBLE is
			-- Read a double from file
			-- (from PLAIN_TEXT_FILE)
		external
			"C (FILE *): EIF_DOUBLE | %"eif_file.h%""
		end

	file_gi (file: POINTER): INTEGER is
			-- Get an integer from file
			-- (from PLAIN_TEXT_FILE)
		external
			"C (FILE *): EIF_INTEGER | %"eif_file.h%""
		end

	file_go (file: POINTER; abs_position: INTEGER) is
			-- Go to absolute position, originated from start.
			-- (from FILE)
		external
			"C (FILE *, EIF_INTEGER) | %"eif_file.h%""
		end

	file_gr (file: POINTER): REAL is
			-- Read a real from file
			-- (from PLAIN_TEXT_FILE)
		external
			"C (FILE *): EIF_REAL | %"eif_file.h%""
		end

	file_gs (file: POINTER; a_string: POINTER; length, begin: INTEGER): INTEGER is
			-- a_string updated with characters read from file
			-- until new line, with begin characters already read.
			-- If it does not fit, result is length - begin + 1.
			-- If it fits, result is number of characters read.
			-- (from FILE)
		external
			"C (FILE *, char *, EIF_INTEGER, EIF_INTEGER): EIF_INTEGER | %"eif_file.h%""
		end

	file_gss (file: POINTER; a_string: POINTER; length: INTEGER): INTEGER is
			-- Read min (length, remaining bytes in file) characters
			-- into a_string. If it does not fit, result is length + 1.
			-- Otherwise, result is the number of characters read.
			-- (from FILE)
		external
			"C (FILE *, char *, EIF_INTEGER): EIF_INTEGER | %"eif_file.h%""
		end

	file_gw (file: POINTER; a_string: POINTER; length, begin: INTEGER): INTEGER is
			-- Read a string excluding white space and stripping
			-- leading white space from file into a_string.
			-- White space characters are: blank, new_line,
			-- tab, vertical tab, formfeed or end of file.
			-- If it does not fit, result is length - begin + 1,
			-- otherwise result is number of characters read.
			-- (from FILE)
		external
			"C (FILE *, char *, EIF_INTEGER, EIF_INTEGER): EIF_INTEGER | %"eif_file.h%""
		end

	file_lh (file: POINTER): CHARACTER is
			-- Look ahead in file and find out the value of the next
			-- character. Do not read over character.
			-- (from FILE)
		external
			"C (FILE *): EIF_CHARACTER | %"eif_file.h%""
		end

	file_link (from_name, to_name: POINTER) is
			-- Link to_name to from_name
			-- (from FILE)
		external
			"C (char *, char *) | %"eif_file.h%""
		end

	file_move (file: POINTER; offset: INTEGER) is
			-- Move file pointer by offset.
			-- (from FILE)
		external
			"C (FILE *, EIF_INTEGER) | %"eif_file.h%""
		end

	file_open (f_name: POINTER; how: INTEGER): POINTER is
			-- File pointer for file f_name, in mode how.
			-- (from FILE)
		external
			"C | %"eif_file.h%""
		end

	file_pc (file: POINTER; c: CHARACTER) is
			-- Put c to end of file.
			-- (from FILE)
		external
			"C (FILE *, EIF_CHARACTER) | %"eif_file.h%""
		end

	file_pd (file: POINTER; d: DOUBLE) is
			-- Put d to end of file.
			-- (from PLAIN_TEXT_FILE)
		external
			"C (FILE *, EIF_DOUBLE) | %"eif_file.h%""
		end

	file_perm (f_name, who, what: POINTER; flag: INTEGER) is
			-- Change permissions for f_name to who and what.
			-- flag = 1 -> add permissions,
			-- flag = 0 -> remove permissions.
			-- (from FILE)
		external
			"C | %"eif_file.h%""
		end

	file_pi (file: POINTER; n: INTEGER) is
			-- Put n to end of file.
			-- (from PLAIN_TEXT_FILE)
		external
			"C (FILE *, EIF_INTEGER) | %"eif_file.h%""
		end

	file_pr (file: POINTER; r: REAL) is
			-- Put r to end of file.
			-- (from PLAIN_TEXT_FILE)
		external
			"C (FILE *, EIF_REAL) | %"eif_file.h%""
		end

	file_ps (file: POINTER; a_string: POINTER; length: INTEGER) is
			-- Print a_string to file.
			-- (from FILE)
		external
			"C (FILE *, char *, EIF_INTEGER) | %"eif_file.h%""
		end

	file_recede (file: POINTER; abs_position: INTEGER) is
			-- Go to absolute position, originated from end.
			-- (from FILE)
		external
			"C (FILE *, EIF_INTEGER) | %"eif_file.h%""
		end

	file_rename (old_name, new_name: POINTER) is
			-- Change file name from old_name to new_name.
			-- (from FILE)
		external
			"C | %"eif_file.h%""
		end

	file_reopen (f_name: POINTER; how: INTEGER; file: POINTER): POINTER is
			-- File pointer to file, reopened to have new name f_name
			-- in a mode specified by how.
			-- (from FILE)
		external
			"C (char *, EIF_INTEGER, FILE *): EIF_POINTER | %"eif_file.h%""
		end

	file_size (file: POINTER): INTEGER is
			-- Size of file
			-- (from FILE)
		external
			"C (FILE *): EIF_INTEGER | %"eif_file.h%""
		end

	file_tell (file: POINTER): INTEGER is
			-- Current cursor position in file.
			-- (from FILE)
		external
			"C (FILE *): EIF_INTEGER | %"eif_file.h%""
		end

	file_tnil (file: POINTER) is
			-- Read upto next input line.
			-- (from FILE)
		external
			"C (FILE *) | %"eif_file.h%""
		end

	file_tnwl (file: POINTER) is
			-- Print a new-line to file.
			-- (from FILE)
		external
			"C (FILE *) | %"eif_file.h%""
		end

	file_touch (f_name: POINTER) is
			-- Touch file f_name.
			-- (from FILE)
		external
			"C | %"eif_file.h%""
		end

	file_unlink (fname: POINTER) is
			-- Delete file fname.
			-- (from FILE)
		external
			"C | %"eif_file.h%""
		end

	file_utime (f_name: POINTER; time, how: INTEGER) is
			-- Set access, modification time or both (how = 0,1,2) on
			-- f_name, using time as time stamp.
			-- (from FILE)
		external
			"C | %"eif_file.h%""
		end

	find_referers (target: POINTER; esult: POINTER; result_size: INTEGER) is
			-- (from MEMORY)
		external
			"C | %"eif_traverse.h%""
		end

	gc_monitoring (flag: BOOLEAN) is
			-- Set up GC monitoring according to flag
			-- (from MEMORY)
		external
			"C | %"eif_memory.h%""
		alias
			"gc_mon"
		end

	mode: INTEGER
			-- Input-output mode
			-- (from FILE)

	Read_file: INTEGER is 1
			-- (from FILE)

	Read_write_file: INTEGER is 4
			-- (from FILE)

	set_buffer is
			-- Resynchronizes information on file
			-- (from FILE)
		require -- from FILE
			file_exists: exists
		do
			buffered_file_info.update (name)
		end

	set_read_mode is
			-- Define file mode as read.
			-- (from FILE)
		do
			mode := read_file
		end

	set_write_mode is
			-- Define file mode as write.
			-- (from FILE)
		do
			mode := write_file
		end

	true_string: STRING is
			-- Character string "true"
			-- (from FILE)
		once
			Result := "True"
		end

	Write_file: INTEGER is 2
			-- (from FILE)
	
feature {NONE} -- Convenience

	copy_to (file: like Current) is
			-- Copy content of current from current cursor
			-- position to end of file into file from
			-- current cursor position of file.
			-- (from FILE)
		require -- from FILE
			file_not_void: file /= void
			file_is_open_write: file.is_open_write
			current_is_open_read: is_open_read
		do
			read_stream (count)
			file.put_string (last_string)
			create last_string.make (256)
		end
	
feature -- Input

	next_line is
			-- Move to next input line on standard input.
		require -- from FILE
			is_readable: file_readable
		do
			console_next_line (file_pointer)
		end

	read_character is
			-- Read a new character from standard input.
			-- Make result available in last_character.
			-- Was declared in CONSOLE as synonym of readchar.
		require -- from IO_MEDIUM
			is_readable: readable
		require else -- from FILE
			is_readable: file_readable
		do
			last_character := console_readchar (file_pointer)
		end

	read_double is
			-- Read a new double from standard input.
			-- Make result available in last_double.
			-- Was declared in CONSOLE as synonym of readdouble.
		require -- from IO_MEDIUM
			is_readable: readable
		require else -- from FILE
			is_readable: file_readable
		do
			last_double := console_readdouble (file_pointer)
		end

	read_integer is
			-- Read a new integer from standard input.
			-- Make result available in last_integer.
			-- Was declared in CONSOLE as synonym of readint.
		require -- from IO_MEDIUM
			is_readable: readable
		require else -- from FILE
			is_readable: file_readable
		do
			last_integer := console_readint (file_pointer)
		end

	read_line is
			-- Read a string until new line or end of file.
			-- Make result available in last_string.
			-- New line will be consumed but not part of last_string.
			-- Was declared in CONSOLE as synonym of readline.
		require -- from IO_MEDIUM
			is_readable: readable
		require else -- from FILE
			is_readable: file_readable
		require else
			is_readable: file_readable
		local
			str_cap: INTEGER
			read: INTEGER
			str_area: ANY
			done: BOOLEAN
		do
			from
				str_area := last_string.area
				str_cap := last_string.capacity
			until
				done
			loop
				read := read + console_readline (file_pointer, $str_area, str_cap, read)
				if read > str_cap then
					last_string.set_count (str_cap)
					if str_cap < 2048 then
						last_string.grow (str_cap + 1024)
					else
						last_string.automatic_grow
					end
					str_area := last_string.area
					str_cap := last_string.capacity
					read := read - 1
				else
					last_string.set_count (read)
					done := True
				end
			end
			if read < 1024 then
				last_string.resize (read)
			end
		end

	read_real is
			-- Read a new real from standard input.
			-- Make result available in last_real.
			-- Was declared in CONSOLE as synonym of readreal.
		require -- from IO_MEDIUM
			is_readable: readable
		require else -- from FILE
			is_readable: file_readable
		do
			last_real := console_readreal (file_pointer)
		end

	read_stream (nb_char: INTEGER) is
			-- Read a string of at most nb_char bound characters
			-- from standard input.
			-- Make result available in last_string.
			-- Was declared in CONSOLE as synonym of readstream.
		require -- from IO_MEDIUM
			is_readable: readable
		require else -- from FILE
			is_readable: file_readable
		local
			new_count: INTEGER
			str_area: ANY
		do
			last_string.resize (nb_char)
			str_area := last_string.area
			new_count := console_readstream (file_pointer, $str_area, nb_char)
			last_string.set_count (new_count)
		end

	read_word is
			-- Read a new word from standard input.
			-- Make result available in last_string.
			-- Was declared in CONSOLE as synonym of readword.
		require -- from FILE
			is_readable: file_readable
		local
			str_area: ANY
			str_cap: INTEGER
			done: BOOLEAN
			read: INTEGER
		do
			from
				str_area := last_string.area
				str_cap := last_string.capacity
			until
				done
			loop
				read := read + console_readword (file_pointer, $str_area, str_cap, read)
				if read > str_cap then
					if str_cap < 2048 then
						last_string.grow (str_cap + 1024)
					else
						last_string.automatic_grow
					end
					str_area := last_string.area
					str_cap := last_string.capacity
					read := read - 1
				else
					last_string.set_count (read)
					done := True
				end
			end
			if read < 1024 then
				last_string.resize (read)
			end
			separator := console_separator (file_pointer)
		end

	readchar is
			-- Read a new character from standard input.
			-- Make result available in last_character.
			-- Was declared in CONSOLE as synonym of read_character.
		require -- from IO_MEDIUM
			is_readable: readable
		require else -- from FILE
			is_readable: file_readable
		do
			last_character := console_readchar (file_pointer)
		end

	readdouble is
			-- Read a new double from standard input.
			-- Make result available in last_double.
			-- Was declared in CONSOLE as synonym of read_double.
		require -- from IO_MEDIUM
			is_readable: readable
		require else -- from FILE
			is_readable: file_readable
		do
			last_double := console_readdouble (file_pointer)
		end

	readint is
			-- Read a new integer from standard input.
			-- Make result available in last_integer.
			-- Was declared in CONSOLE as synonym of read_integer.
		require -- from IO_MEDIUM
			is_readable: readable
		require else -- from FILE
			is_readable: file_readable
		do
			last_integer := console_readint (file_pointer)
		end

	readline is
			-- Read a string until new line or end of file.
			-- Make result available in last_string.
			-- New line will be consumed but not part of last_string.
			-- Was declared in CONSOLE as synonym of read_line.
		require -- from IO_MEDIUM
			is_readable: readable
		require else -- from FILE
			is_readable: file_readable
		require else
			is_readable: file_readable
		local
			str_cap: INTEGER
			read: INTEGER
			str_area: ANY
			done: BOOLEAN
		do
			from
				str_area := last_string.area
				str_cap := last_string.capacity
			until
				done
			loop
				read := read + console_readline (file_pointer, $str_area, str_cap, read)
				if read > str_cap then
					last_string.set_count (str_cap)
					if str_cap < 2048 then
						last_string.grow (str_cap + 1024)
					else
						last_string.automatic_grow
					end
					str_area := last_string.area
					str_cap := last_string.capacity
					read := read - 1
				else
					last_string.set_count (read)
					done := True
				end
			end
			if read < 1024 then
				last_string.resize (read)
			end
		end

	readreal is
			-- Read a new real from standard input.
			-- Make result available in last_real.
			-- Was declared in CONSOLE as synonym of read_real.
		require -- from IO_MEDIUM
			is_readable: readable
		require else -- from FILE
			is_readable: file_readable
		do
			last_real := console_readreal (file_pointer)
		end

	readstream (nb_char: INTEGER) is
			-- Read a string of at most nb_char bound characters
			-- from standard input.
			-- Make result available in last_string.
			-- Was declared in CONSOLE as synonym of read_stream.
		require -- from IO_MEDIUM
			is_readable: readable
		require else -- from FILE
			is_readable: file_readable
		local
			new_count: INTEGER
			str_area: ANY
		do
			last_string.resize (nb_char)
			str_area := last_string.area
			new_count := console_readstream (file_pointer, $str_area, nb_char)
			last_string.set_count (new_count)
		end

	readword is
			-- Read a new word from standard input.
			-- Make result available in last_string.
			-- Was declared in CONSOLE as synonym of read_word.
		require -- from FILE
			is_readable: file_readable
		local
			str_area: ANY
			str_cap: INTEGER
			done: BOOLEAN
			read: INTEGER
		do
			from
				str_area := last_string.area
				str_cap := last_string.capacity
			until
				done
			loop
				read := read + console_readword (file_pointer, $str_area, str_cap, read)
				if read > str_cap then
					if str_cap < 2048 then
						last_string.grow (str_cap + 1024)
					else
						last_string.automatic_grow
					end
					str_area := last_string.area
					str_cap := last_string.capacity
					read := read - 1
				else
					last_string.set_count (read)
					done := True
				end
			end
			if read < 1024 then
				last_string.resize (read)
			end
			separator := console_separator (file_pointer)
		end
	
feature {NONE} -- Iteration

	do_all (action: PROCEDURE [ANY, TUPLE [CHARACTER]]) is
			-- Apply action to every item.
			-- Semantics not guaranteed if action changes the structure;
			-- in such a case, apply iterator to clone of structure instead.
			-- (from LINEAR)
		require -- from TRAVERSABLE
			action_exists: action /= void
		local
			t: TUPLE [CHARACTER]
		do
			create t.make
			from
				start
			until
				after
			loop
				t.put (item, 1)
				action.call (t)
				forth
			end
		end

	do_if (action: PROCEDURE [ANY, TUPLE [CHARACTER]]; test: FUNCTION [ANY, TUPLE [CHARACTER], BOOLEAN]) is
			-- Apply action to every item that satisfies test.
			-- Semantics not guaranteed if action or test changes the structure;
			-- in such a case, apply iterator to clone of structure instead.
			-- (from LINEAR)
		require -- from TRAVERSABLE
			action_exists: action /= void
			test_exits: test /= void
		local
			t: TUPLE [CHARACTER]
		do
			create t.make
			from
				start
			until
				after
			loop
				t.put (item, 1)
				if test.item (t) then
					action.call (t)
				end
				forth
			end
		end

	for_all (test: FUNCTION [ANY, TUPLE [CHARACTER], BOOLEAN]): BOOLEAN is
			-- Is test true for all items?
			-- (from LINEAR)
		require -- from TRAVERSABLE
			test_exits: test /= void
		local
			cs: CURSOR_STRUCTURE [CHARACTER]
			c: CURSOR
			t: TUPLE [CHARACTER]
		do
			create t.make
			cs ?= Current
			if cs /= void then
				c := cs.cursor
			end
			from
				start
				Result := True
			until
				after or not Result
			loop
				t.put (item, 1)
				Result := test.item (t)
				forth
			end
			if cs /= void then
				cs.go_to (c)
			end
		end

	there_exists (test: FUNCTION [ANY, TUPLE [CHARACTER], BOOLEAN]): BOOLEAN is
			-- Is test true for at least one item?
			-- (from LINEAR)
		require -- from TRAVERSABLE
			test_exits: test /= void
		local
			cs: CURSOR_STRUCTURE [CHARACTER]
			c: CURSOR
			t: TUPLE [CHARACTER]
		do
			create t.make
			cs ?= Current
			if cs /= void then
				c := cs.cursor
			end
			from
				start
			until
				after or Result
			loop
				t.put (item, 1)
				Result := test.item (t)
				forth
			end
			if cs /= void then
				cs.go_to (c)
			end
		end
	
feature -- Output

	new_line is
			-- Write line feed at end of default output.
			-- Was declared in CONSOLE as synonym of put_new_line.
		require -- from IO_MEDIUM
			extendible: extendible
		do
			console_tnwl (file_pointer)
		end

	put_boolean (b: BOOLEAN) is
			-- Write b at end of default output.
			-- Was declared in CONSOLE as synonym of putbool.
		require -- from IO_MEDIUM
			extendible: extendible
		do
			if b then
				put_string ("True")
			else
				put_string ("False")
			end
		end

	put_character (c: CHARACTER) is
			-- Write c at end of default output.
			-- Was declared in CONSOLE as synonym of putchar.
		require -- from IO_MEDIUM
			extendible: extendible
		do
			console_pc (file_pointer, c)
		end

	put_double (d: DOUBLE) is
			-- Write d at end of default output.
			-- Was declared in CONSOLE as synonym of putdouble.
		require -- from IO_MEDIUM
			extendible: extendible
		do
			console_pd (file_pointer, d)
		end

	put_integer (i: INTEGER) is
			-- Write i at end of default output.
			-- Was declared in CONSOLE as synonym of putint.
		require -- from IO_MEDIUM
			extendible: extendible
		do
			console_pi (file_pointer, i)
		end

	put_new_line is
			-- Write line feed at end of default output.
			-- Was declared in CONSOLE as synonym of new_line.
		require -- from IO_MEDIUM
			extendible: extendible
		do
			console_tnwl (file_pointer)
		end

	put_real (r: REAL) is
			-- Write r at end of default output.
			-- Was declared in CONSOLE as synonym of putreal.
		require -- from IO_MEDIUM
			extendible: extendible
		do
			console_pr (file_pointer, r)
		end

	put_string (s: STRING) is
			-- Write s at end of default output.
			-- Was declared in CONSOLE as synonym of putstring.
		require -- from IO_MEDIUM
			extendible: extendible
			non_void: s /= void
		local
			external_s: ANY
		do
			if s.count /= 0 then
				external_s := s.area
				console_ps (file_pointer, $external_s, s.count)
			end
		end

	putbool (b: BOOLEAN) is
			-- Write b at end of default output.
			-- Was declared in CONSOLE as synonym of put_boolean.
		require -- from IO_MEDIUM
			extendible: extendible
		do
			if b then
				put_string ("True")
			else
				put_string ("False")
			end
		end

	putchar (c: CHARACTER) is
			-- Write c at end of default output.
			-- Was declared in CONSOLE as synonym of put_character.
		require -- from IO_MEDIUM
			extendible: extendible
		do
			console_pc (file_pointer, c)
		end

	putdouble (d: DOUBLE) is
			-- Write d at end of default output.
			-- Was declared in CONSOLE as synonym of put_double.
		require -- from IO_MEDIUM
			extendible: extendible
		do
			console_pd (file_pointer, d)
		end

	putint (i: INTEGER) is
			-- Write i at end of default output.
			-- Was declared in CONSOLE as synonym of put_integer.
		require -- from IO_MEDIUM
			extendible: extendible
		do
			console_pi (file_pointer, i)
		end

	putreal (r: REAL) is
			-- Write r at end of default output.
			-- Was declared in CONSOLE as synonym of put_real.
		require -- from IO_MEDIUM
			extendible: extendible
		do
			console_pr (file_pointer, r)
		end

	putstring (s: STRING) is
			-- Write s at end of default output.
			-- Was declared in CONSOLE as synonym of put_string.
		require -- from IO_MEDIUM
			extendible: extendible
			non_void: s /= void
		local
			external_s: ANY
		do
			if s.count /= 0 then
				external_s := s.area
				console_ps (file_pointer, $external_s, s.count)
			end
		end
	
invariant

		-- from ANY
	reflexive_equality: standard_is_equal (Current)
	reflexive_conformance: conforms_to (Current)
		-- from PLAIN_TEXT_FILE
	plain_text: is_plain_text
		-- from FILE
	valid_mode: closed_file <= mode and mode <= append_read_file
	name_exists: name /= void
	name_not_empty: not name.is_empty
		-- from FINITE
	empty_definition: is_empty = (count = 0)
	non_negative_count: count >= 0
		-- from ACTIVE
	writable_constraint: writable implies readable
	empty_constraint: is_empty implies (not readable) and (not writable)
		-- from BILINEAR
	not_both: not (after and before)
	before_constraint: before implies off
		-- from LINEAR
	after_constraint: after implies off
		-- from TRAVERSABLE
	empty_constraint: is_empty implies off

indexing
	library: "[
			EiffelBase: Library of reusable components for Eiffel.
	]"
	status: "[
			Copyright 1986-2001 Interactive Software Engineering (ISE).
			For ISE customers the original versions are an ISE product
			covered by the ISE Eiffel license and support agreements.
	]"
	license: "[
			EiffelBase may now be used by anyone as FREE SOFTWARE to
			develop any product, public-domain or commercial, without
			payment to ISE, under the terms of the ISE Free Eiffel Library
			License (IFELL) at http://eiffel.com/products/base/license.html.
	]"
	source: "[
			Interactive Software Engineering Inc.
			ISE Building
			360 Storke Road, Goleta, CA 93117 USA
			Telephone 805-685-1006, Fax 805-685-6869
			Electronic mail <info@eiffel.com>
			Customer support http://support.eiffel.com
	]"
	info: "[
			For latest info see award-winning pages: http://eiffel.com
	]"

end -- class CONSOLE


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