143 lines
3.8 KiB
Factor
143 lines
3.8 KiB
Factor
! :folding=indent:collapseFolds=1:
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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: unparser
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USE: combinators
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USE: kernel
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USE: format
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USE: lists
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USE: logic
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USE: math
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USE: namespaces
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USE: parser
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USE: stack
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USE: stdio
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USE: strings
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USE: words
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: >digit ( n -- ch )
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dup 10 < [ CHAR: 0 + ] [ 10 - CHAR: a + ] ifte ;
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: integer% ( num radix -- )
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tuck /mod >digit % dup 0 > [
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swap integer%
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] [
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2drop
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] ifte ;
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: integer- ( num -- num )
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dup 0 < [ "-" % neg ] when ;
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: >base ( num radix -- string )
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#! Convert a number to a string in a certain base.
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<% over 0 < [
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swap neg swap integer% CHAR: - %
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] [
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integer%
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] ifte reverse%> ;
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: >dec ( num -- string )
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#! Convert an integer to its decimal representation.
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10 >base ;
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: >bin ( num -- string )
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#! Convert an integer to its binary representation.
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2 >base ;
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: >oct ( num -- string )
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#! Convert an integer to its octal representation.
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8 >base ;
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: >hex ( num -- string )
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#! Convert an integer to its hexadecimal representation.
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16 >base ;
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DEFER: unparse
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: unparse-ratio ( num -- str )
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<% dup
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numerator unparse %
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CHAR: / %
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denominator unparse % %> ;
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: unparse-complex ( num -- str )
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>rect <% "#{ " % swap unparse % " " % unparse % " }" % %> ;
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: ch>ascii-escape ( ch -- esc )
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[
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[ CHAR: \e | "\\e" ]
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[ CHAR: \n | "\\n" ]
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[ CHAR: \r | "\\r" ]
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[ CHAR: \t | "\\t" ]
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[ CHAR: \0 | "\\0" ]
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[ CHAR: \\ | "\\\\" ]
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[ CHAR: \" | "\\\"" ]
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] assoc ;
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: ch>unicode-escape ( ch -- esc )
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>hex 4 digits "\\u" swap cat2 ;
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: unparse-ch ( ch -- ch/str )
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dup quotable? [
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dup ch>ascii-escape dup [
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nip
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] [
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drop ch>unicode-escape
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] ifte
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] unless ;
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: unparse-str ( str -- str )
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<% CHAR: " % [ unparse-ch % ] str-each CHAR: " % %> ;
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: unparse-word ( word -- str )
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word-name dup "#<unnamed>" ? ;
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: fix-float ( str -- str )
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#! This is terrible. Will go away when we do our own float
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#! output.
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"." over str-contains? [ ".0" cat2 ] unless ;
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: unparse-unknown ( obj -- str )
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<% "#<" %
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dup type type-name %
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" @ " %
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address unparse %
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">" % %> ;
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: unparse ( obj -- str )
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[
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[ t eq? ] [ drop "t" ]
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[ f eq? ] [ drop "f" ]
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[ word? ] [ unparse-word ]
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[ integer? ] [ >dec ]
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[ ratio? ] [ unparse-ratio ]
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[ float? ] [ unparse-float fix-float ]
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[ complex? ] [ unparse-complex ]
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[ string? ] [ unparse-str ]
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[ drop t ] [ unparse-unknown ]
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] cond ;
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