35 lines
895 B
Factor
35 lines
895 B
Factor
USING: io kernel math math.functions math.parser parser lexer
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namespaces make sequences splitting grouping combinators
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continuations ;
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IN: money
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SYMBOL: currency-token
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CHAR: $ \ currency-token set-global
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: dollars/cents ( dollars -- dollars cents )
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100 * 100 /mod round ;
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: (money>string) ( dollars cents -- string )
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[ number>string ] bi@
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[ <reversed> 3 group "," join <reversed> ]
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[ 2 CHAR: 0 pad-left ] bi* "." glue ;
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: money>string ( object -- string )
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dollars/cents (money>string) currency-token get prefix ;
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: money. ( object -- ) money>string print ;
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ERROR: not-an-integer x ;
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: parse-decimal ( str -- ratio )
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"." split1
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[ "-" ?head swap ] dip
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[ [ "0" ] when-empty ] bi@
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[
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[ dup string>number [ nip ] [ not-an-integer ] if* ] bi@
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] keep length
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10 swap ^ / + swap [ neg ] when ;
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: DECIMAL:
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scan parse-decimal parsed ; parsing
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