+++ /dev/null
-# This file is part of NIT ( http://www.nitlanguage.org ).
-#
-# Copyright 2005-2008 Jean Privat <jean@pryen.org>
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# The Comptuer Language Shootout Benchmarks
-# http://shootout.alioth.debian.org
-#
-# contributed by Jean Privat
-
-# Incorrect without bignums
-
-class PiDigitSpigot
- var _z: Transformation
- var _x: Transformation
- var _inverse: Transformation
-
-
- init
- do
- _z = new Transformation(1,0,0,1)
- _x = new Transformation(0,0,0,0)
- _inverse = new Transformation(0,0,0,0)
- end
-
-
- fun next: Int
- do
- var y = digit
- if is_safe(y) then
- _z = produce(y)
- return y
- else
- _z = consume(_x.next)
- return next
- end
- end
-
- fun next_: Int
- do
- var y = digit
- while not is_safe(y) do
- _z = consume(_x.next)
- y = digit
- end
- _z = produce(y)
- return y
- end
-
- fun digit: Int
- do
- return _z.extract(3)
- end
-
- fun is_safe(digit: Int): Bool
- do
- return digit == _z.extract(4)
- end
-
- fun produce(i: Int): Transformation
- do
- return _inverse.qrst(10,-10*i,0,1).compose(_z)
- end
-
- fun consume(a: Transformation): Transformation
- do
- return _z.compose(a)
- end
-end
-
-
-class Transformation
- var _q: Int
- var _r: Int
- var _s: Int
- var _t: Int
- var _k: Int
-
- init(q: Int, r: Int, s: Int, t: Int)
- do
- set(q, r, s, t)
- end
-
- fun set(q: Int, r: Int, s: Int, t: Int)
- do
- _q = q
- _r = r
- _s = s
- _t = t
- _k = 0
- end
-
-
- fun next: Transformation
- do
- _k = _k + 1
- _q = _k
- _r = 4 * _k + 2
- _s = 0
- _t = 2 * _k + 1
- return self
- end
-
- fun extract(j: Int): Int
- do
- return (_q * j + _r) / (_s * j + _t)
- end
-
- fun compose(a: Transformation): Transformation
- do
- return new Transformation(
- _q * a._q,
- _q * a._r + _r * a._t,
- _s * a._q + _t * a._s,
- _s * a._r + _t * a._t
- )
- end
-
- fun qrst(q: Int, r: Int, s: Int, t: Int): Transformation
- do
- set(q, r, s, t)
- return self
- end
-end
-
-
-var witdh = 10
-var n = args.first.to_i
-var j = 0
-
-var digits = new PiDigitSpigot
-
-while n > 0 do
- if n >= witdh then
- for i in [0..witdh[ do
- printn(digits.next)
- end
- j = j + witdh
- else
- for i in [0..n[ do
- printn(digits.next)
- end
- for i in [n..witdh[ do
- printn(" ")
- end
- j = j + n
- end
- print("\t:{j}")
- n = n - witdh
-end
nitlanguage / nit.git / commitdiff