The Computer Language
24.12 Benchmarks Game

pidigits VW Smalltalk #4 program

source code

"* The Computer Language Benchmarks Game
    https://salsa.debian.org/benchmarksgame-team/benchmarksgame/
    contributed by Paolo Bonzini 
    modified by Andres Valloud *"!

Smalltalk.Core defineClass: #BenchmarksGame
	superclass: #{Core.Object}
	indexedType: #none
	private: false
	instanceVariableNames: ''
	classInstanceVariableNames: ''
	imports: ''
	category: ''!

Smalltalk defineClass: #PiDigitSpigot
	superclass: #{Core.Stream}
	indexedType: #none
	private: false
	instanceVariableNames: 'numer accum denom k '
	classInstanceVariableNames: ''
	imports: ''
	category: 'Shootout'!

!Core.BenchmarksGame class methodsFor: 'private'!

pidigitsTo: v width: width to: output
   | n i pidigits |
   n := v.
   i := 0.
   pidigits := PiDigitSpigot new.
   [n > 0] whileTrue:
      [n < width
         ifTrue:
            [n timesRepeat: [output nextPut: (Character digitValue: pidigits next)].
            n to: width do: [:each | output space].
            i := i + n]
         ifFalse:
            [width timesRepeat: [output nextPut: (Character digitValue: pidigits next)].
            i := i + width].

      output tab; nextPut: $:; print: i; nl.

      n := n - width]! !

!Core.BenchmarksGame class methodsFor: 'initialize-release'!

do: n
   self pidigitsTo: n width: 10 to: Stdout.
   ^''! !


!PiDigitSpigot class methodsFor: 'instance creation'!

new
   ^super basicNew initialize! !


!PiDigitSpigot methodsFor: 'private'!

initialize
    numer := denom := 1.
    k := accum := 0.!

extract
    | tmp |
    numer > accum ifTrue: [^nil].
    tmp := numer + numer + numer + accum.
    tmp \\ denom >= (denom - numer) ifTrue: [^nil].
    ^tmp // denom!

eliminate: digit
    accum := accum - (denom * digit).
    accum := accum * 10.
    numer := numer * 10!

step
    | y2 |
    k := k + 1.
    y2 := k * 2 + 1.
    accum := (numer + numer + accum) * y2.
    numer := numer * k.
    denom := denom * y2.! !

!PiDigitSpigot methodsFor: 'stream'!

atEnd
    ^false!

next
    | digit |
    [ self step. (digit := self extract) isNil ] whileTrue.
    self eliminate: digit.
    ^digit! !

!Core.Stream methodsFor: 'benchmarks game'!

nl
   self nextPut: Character lf! !
    

notes, command-line, and program output

NOTES:
64-bit Ubuntu quad core
VisualWorks® 8.3
Aug 19 2017


 Wed, 29 May 2024 01:22:56 GMT

MAKE:
cp /opt/src/vw8.3pul/image/visualnc64.im pidigits.vw-4.vw_run.im
/opt/src/vw8.3pul/bin/visual pidigits.vw-4.vw_run.im -nogui -pcl MatriX -filein pidigits.vw-4.vw -doit 'ObjectMemory snapshotThenQuit'

Autoloading MatriX from $(VISUALWORKS)/preview/matrix/MatriX.pcl
Autoloading Xtreams-Support from $(VISUALWORKS)/xtreams/Xtreams-Support.pcl
Autoloading Xtreams-Core from $(VISUALWORKS)/xtreams/Xtreams-Core.pcl
Autoloading Xtreams-Terminals from $(VISUALWORKS)/xtreams/Xtreams-Terminals.pcl
Autoloading Xtreams-Transforms from $(VISUALWORKS)/xtreams/Xtreams-Transforms.pcl
Autoloading Xtreams-Substreams from $(VISUALWORKS)/xtreams/Xtreams-Substreams.pcl
Autoloading Xtreams-Multiplexing from $(VISUALWORKS)/xtreams/Xtreams-Multiplexing.pcl
Filing in from:
	pidigits.vw-4.vw
BenchmarksGame class<private
BenchmarksGame class<initialize-release
PiDigitSpigot class<instance creation
PiDigitSpigot<private
PiDigitSpigot<stream
Stream<benchmarks game
Do you want to add Root.Smalltalk.Core.Stream>>nl to the previously unchanged package, Collections-Streams
						OK to continue?
/home/dunham/all-benchmarksgame/benchmarksgame_i53330/pidigits/tmp/pidigits.vw-4.vw_run.im created at May 28, 2024 6:22:49 PM
7.50s to complete and log all make actions

COMMAND LINE:
 /opt/src/vw8.3pul/bin/visual pidigits.vw-4.vw_run.im -nogui -evaluate "BenchmarksGame do: 10000"

(TRUNCATED) PROGRAM OUTPUT:
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