! :folding=none:collapseFolds=1:

! $Id$
!
! Copyright (C) 2005 Slava Pestov.
! 
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! modification, are permitted provided that the following conditions are met:
! 
! 1. Redistributions of source code must retain the above copyright notice,
!    this list of conditions and the following disclaimer.
! 
! 2. Redistributions in binary form must reproduce the above copyright notice,
!    this list of conditions and the following disclaimer in the documentation
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IN: kernel-internals
USE: generic
USE: math-internals
USE: kernel

! An array is a range of memory storing pointers to other
! objects. Arrays are not used directly, and their access words
! are not bounds checked. Examples of abstractions built on
! arrays include vectors, hashtables, and tuples.

! These words are unsafe. I'd say "do not call them", but that
! Java-esque. By all means, do use arrays if you need something
! low-level... but be aware that vectors are usually a better
! choice.

BUILTIN: array 8

: array-capacity   ( array -- n )   1 integer-slot ; inline
: vector-array     ( vec -- array ) 2 slot ; inline
: set-vector-array ( array vec -- ) 2 set-slot ; inline

: array-nth ( n array -- obj )
    swap 2 fixnum+ slot ; inline

: set-array-nth ( obj n array -- )
    swap 2 fixnum+ set-slot ; inline