72 lines
2.4 KiB
Factor
72 lines
2.4 KiB
Factor
! :folding=indent:collapseFolds=0:
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! $Id$
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!
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! Copyright (C) 2004 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: format
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USE: combinators
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USE: kernel
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USE: math
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USE: namespaces
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USE: strings
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USE: stack
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: decimal-split ( string -- string string )
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#! Split a string before and after the decimal point.
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dup "." index-of dup -1 = [ drop f ] [ str// ] ifte ;
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: decimal-tail ( str count -- string )
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#! Given a decimal, trims all but a count of decimal places.
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over str-length min str-head ;
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: decimal-cat ( before after -- string )
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#! If after is of zero length, return before, otherwise
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#! return "before.after".
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dup str-length 0 = [
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drop
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] [
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"." swap cat3
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] ifte ;
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: decimal-places ( num count -- string )
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#! Trims the number to a count of decimal places.
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swap decimal-split dup [
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rot decimal-tail decimal-cat
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] [
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drop nip
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] ifte ;
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: digits ( string count -- string )
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#! Make sure string has at least count digits, padding it
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#! with zeroes on the left if needed.
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over str-length - dup 0 <= [
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drop
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] [
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"0" fill swap cat2
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] ifte ;
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: pad-string ( len str -- str )
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str-length - " " fill ;
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