! :folding=indent:collapseFolds=1: ! $Id$ ! ! Copyright (C) 2004 Slava Pestov. ! ! Redistribution and use in source and binary forms, with or without ! 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 ! and/or other materials provided with the distribution. ! ! THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, ! INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND ! FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ! DEVELOPERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ! SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ! PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; ! OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, ! WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR ! OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ! ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. IN: vectors USE: kernel USE: lists USE: math USE: stack : empty-vector ( len -- vec ) #! Creates a vector with 'len' elements set to f. Unlike #! , which gives an empty vector with a certain #! capacity. dup dup >r set-vector-length r> ; : vector-empty? ( obj -- ? ) vector-length 0 = ; : vector-clear ( vector -- list ) #! Clears a vector. 0 swap set-vector-length ; : vector-push ( obj vector -- ) #! Push a value on the end of a vector. dup vector-length swap set-vector-nth ; : vector-peek ( vector -- obj ) #! Get value at end of vector without removing it. dup vector-length pred swap vector-nth ; : vector-pop ( vector -- obj ) #! Get value at end of vector and remove it. dup vector-length pred ( vector top ) 2dup swap vector-nth >r swap set-vector-length r> ; : >pop> ( stack -- stack ) dup vector-pop drop ; DEFER: vector-map : vector-clone ( vector -- vector ) #! Shallow copy of a vector. [ ] vector-map ;