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[SOLVED] DSRN (dog slow roman numerals)
06-14-2014, 02:27 AM
Post: #24
RE: DSRN (dog slow roman numerals)
Doesn't do much for the speed, but a ridiculously simple change shaves more than 10% off the size.

Code:

RPL

( constants [and their definitions] used by the app )
DEFINE  TotalLAMs     BINT3
DEFINE  GetResult     1GETLAM
DEFINE  PutResult     1PUTLAM
DEFINE  RomNumSub     2GETEVAL
DEFINE  GetCurVal     3GETLAM
DEFINE  PutCurVal     3PUTLAM

::
  CK1NOLASTWD                         ( must have at least one item on stack          )
  CK&DISPATCH1                        ( check the value's type [real or zint->real]   )
  real
  ::
    COERCE                            ( LAM 3 - CurVal [converted to a BINT]          )
    ' ::                              ( LAM 2 - RomNumSub subroutine                  )
                                      ( upon entry: SL2-> String, SL1-> Magnitude     )

      GetCurVal SWAP #/               ( divide current value by magnitude             )
                                      ( note: #/ returns #r #q                        )
      SWAP PutCurVal                  ( save remainder as new current value,          )
                                      (    leave quotient on stack                    )
      NDUPN                           ( make [quotient] copies of roman numerals      )
      DUP#0<>                         ( check to see if any digits need to be added   )
      ITE
      ::                              ( yes - accumulate digits                       )
        BEGIN
          #1-DUP #0<>                 (   loop 1 less time than # of duplicates       )
        WHILE
          :: UNROT &$SWAP ;           (   combine digits, swap counter into SL1       )
        REPEAT
        DROP                          (   drop the duplicate count                    )
        GetResult SWAP&$ PutResult    (   append the new digits to the result         )
      ;
        DROP                          ( no digits to add - just drop the count        )
    ;
    NULL$                             ( LAM 1 - Result                                )
*   NULLLAM TotalLAMs NDUPN DOBIND    ( Bind LAMs                                     )
    PTR 27208 BIND

    ( build the result string )
    "M"   # 3E8     RomNumSub         ( 1000 )
    "CM"  # 384     RomNumSub         (  900 )
    "D"   # 1F4     RomNumSub         (  500 )
    "CD"  # 190     RomNumSub         (  400 )
    "C"   BINT100   RomNumSub         (  100 )
    "XC"  BINT90    RomNumSub         (   90 )
    "L"   BINT50    RomNumSub         (   50 )
    "XL"  BINT40    RomNumSub         (   40 )
    "X"   BINT10    RomNumSub         (   10 )
    "IX"  BINT9     RomNumSub         (    9 )
    "V"   BINT5     RomNumSub         (    5 )
    "IV"  BINT4     RomNumSub         (    4 )
    "I"   BINT1     RomNumSub         (    1 )

    GetResult                         ( retrieve result                               )
    ABND                              ( abandon LAMs                                  )
  ;
;

In case it's not obvious, I mainly rearranged the temporaries so as to be able to use the 2GETEVAL word, saving 32.5 bytes. I also saved another five bytes in the binding.
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Messages In This Thread
RE: DSRN (dog slow roman numerals) - HP67 - 06-11-2014, 07:06 PM
RE: DSRN (dog slow roman numerals) - HP67 - 06-12-2014, 11:44 AM
RE: DSRN (dog slow roman numerals) - HP67 - 06-12-2014, 04:49 PM
RE: DSRN (dog slow roman numerals) - HP67 - 06-15-2014, 12:02 PM
RE: DSRN (dog slow roman numerals) - HP67 - 06-16-2014, 06:09 AM
RE: DSRN (dog slow roman numerals) - HP67 - 06-12-2014, 05:46 PM
RE: DSRN (dog slow roman numerals) - kakima - 06-14-2014 02:27 AM



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