note
	description: "Stream of data stored in non Eiffel memory"
	library: "Free implementation of ELKS library"
	status: "See notice at end of class."
	legal: "See notice at end of class."
	date: "$Date: 2012-05-24 04:13:10 +0000 (Thu, 24 May 2012) $"
	revision: "$Revision: 91981 $"

class interface
	MEMORY_STREAM

create 
	make,
	make_from_pointer

feature -- Access

	count: INTEGER_32
			-- Number of bytes in Current.

	capacity: INTEGER_32
			-- Number of bytes in Current.

	area: POINTER
			-- Memory area that holds data.
		ensure
			non_void_area: Result /= default_pointer

	item alias "[]" (i: INTEGER_32): INTEGER_8 assign put
			-- Entry at index i.
			-- Was declared in MEMORY_STREAM as synonym of at.
		require
			valid_index: valid_index (i)

	at alias "@" (i: INTEGER_32): INTEGER_8 assign put
			-- Entry at index i.
			-- Was declared in MEMORY_STREAM as synonym of item.
		require
			valid_index: valid_index (i)
	
feature -- Status report

	valid_index (i: INTEGER_32): BOOLEAN
			-- Is i within the bounds of Current?

	is_resizable: BOOLEAN
			-- Can Current be resized?
	
feature -- Setting

	set_count (n: INTEGER_32)
			-- Was declared in MEMORY_STREAM as synonym of set_capacity.
		require
			valid_index: valid_index (n - 1)
		ensure
			capacity_set: capacity = n

	set_capacity (n: INTEGER_32)
			-- Was declared in MEMORY_STREAM as synonym of set_count.
		require
			valid_index: valid_index (n - 1)
		ensure
			capacity_set: capacity = n
	
feature -- Element change

	put (v: INTEGER_8; i: INTEGER_32)
			-- Replace i-th entry by v.
		require
			valid_index: valid_index (i)
		ensure
			inserted: item (i) = v

	force (v: INTEGER_8; i: INTEGER_32)
			-- Replace i-th entry by v.
			-- If i is out of bound, reallocate Current.
		require
			positive_index: i > 0
		ensure
			inserted: item (i) = v

	append (other: like Current)
			-- Append other at the end of Current.
		require
			other_not_void: other /= Void
			resizable: is_resizable
	
feature -- Comparison

	is_equal (other: like Current): BOOLEAN
			-- Is other attached to an object considered
			-- equal to current object?
	
feature -- Duplication

	copy (other: like Current)
			-- Copy other in Current
	
feature -- Disposal

	dispose
			-- Release area.
	
invariant
	non_void_internal_area: internal_area /= Void
	area_not_null: area /= default_pointer

note
	copyright: "Copyright (c) 1984-2012, 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 MEMORY_STREAM

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