54 lines
2.1 KiB
Factor
54 lines
2.1 KiB
Factor
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! :folding=none:collapseFolds=1:
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! $Id$
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!
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! Copyright (C) 2005 Slava Pestov.
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!
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! Redistribution and use in source and binary forms, with or without
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! modification, are permitted provided that the following conditions are met:
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!
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! 1. Redistributions of source code must retain the above copyright notice,
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! this list of conditions and the following disclaimer.
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!
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! 2. Redistributions in binary form must reproduce the above copyright notice,
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! this list of conditions and the following disclaimer in the documentation
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! and/or other materials provided with the distribution.
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!
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! THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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! INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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! FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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! DEVELOPERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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! SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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! PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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! OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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! WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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! OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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! ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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IN: kernel-internals
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USE: generic
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USE: math-internals
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USE: kernel
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! An array is a range of memory storing pointers to other
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! objects. Arrays are not used directly, and their access words
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! are not bounds checked. Examples of abstractions built on
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! arrays include vectors, hashtables, and tuples.
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! These words are unsafe. I'd say "do not call them", but that
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! Java-esque. By all means, do use arrays if you need something
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! low-level... but be aware that vectors are usually a better
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! choice.
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BUILTIN: array 8
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: array-capacity ( array -- n ) 1 integer-slot ; inline
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: vector-array ( vec -- array ) 2 slot ; inline
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: set-vector-array ( array vec -- ) 2 set-slot ; inline
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: array-nth ( n array -- obj )
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swap 2 fixnum+ slot ; inline
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: set-array-nth ( obj n array -- )
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swap 2 fixnum+ set-slot ; inline
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