1 ! Copyright (C) 2008 Slava Pestov.
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2 ! See http://factorcode.org/license.txt for BSD license.
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3 USING: accessors kernel models arrays sequences math math.order
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7 TUPLE: range < product ;
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9 : <range> ( value page min max -- range )
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10 4array [ <model> ] map range new-product ;
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12 : range-model ( range -- model ) dependencies>> first ;
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13 : range-page ( range -- model ) dependencies>> second ;
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14 : range-min ( range -- model ) dependencies>> third ;
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15 : range-max ( range -- model ) dependencies>> fourth ;
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17 M: range range-value
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18 [ range-model value>> ] keep clamp-value ;
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20 M: range range-page-value range-page value>> ;
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22 M: range range-min-value range-min value>> ;
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24 M: range range-max-value range-max value>> ;
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26 M: range range-max-value*
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27 [ range-max-value ] [ range-page-value ] bi [-] ;
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29 M: range set-range-value
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30 [ clamp-value ] [ range-model ] bi set-model ;
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32 M: range set-range-page-value range-page set-model ;
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34 M: range set-range-min-value range-min set-model ;
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36 M: range set-range-max-value range-max set-model ;
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38 : move-by ( amount range -- )
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39 [ range-value + ] keep set-range-value ;
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41 : move-by-page ( amount range -- )
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42 [ range-page-value * ] keep move-by ;
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