fork(77) download
copy 
  1. """
  2. Pi In Bf interpreter
  3. @author stranjo and thotypous
  4. """
  5. import sys, random
  6.  
  7. def bf(string):
  8.  
  9.  
  10.     dpointer = pointer = 0
  11.     plist = [0]*3000
  12.     stack = []
  13.     string = list(string)
  14.  
  15.     while pointer < len(string):
  16.         if pointer == 0:
  17.             stack.append(-1)
  18.  
  19.         if string[pointer] == '+':
  20.             plist[dpointer] +=1
  21.             plist[dpointer] &= 0xFF
  22.  
  23.         elif string[pointer] == '-':
  24.             plist[dpointer] -= 1
  25.             plist[dpointer] &= 0xFF
  26.  
  27.         elif string[pointer] == '>':
  28.             dpointer += 1
  29.  
  30.         elif string[pointer] == '<':
  31.             dpointer-=1
  32.             if dpointer < 0: dpointer = 0
  33.  
  34.         elif string[pointer] == ']':
  35.             pointer = stack.pop()
  36.  
  37.         elif string[pointer] == '[':
  38.             if plist[dpointer]:
  39.                 stack.append(pointer-1)
  40.             else:
  41.                 while string[pointer] != ']': pointer+=1
  42.  
  43.         elif string[pointer] == '.':
  44.             sys.stdout.write(chr(plist[dpointer]))
  45.             sys.stdout.flush()
  46.         elif string[pointer] == ',':
  47.             plist[dpointer] = ord(sys.stdin.readline()[0])
  48.             sys.stdin.flush()
  49.         pointer+=1
  50.  
  51. def pi2bf(string):
  52.     out = ""
  53.     t = { 0:'>', 1:'<', 2:'+', 3:'-', 4:'.', 5:',', 6:'[', 7:']' }
  54.     k, a, b, a1, b1, r = 2, 4, 1, 12, 4, True
  55.     while r:
  56.         p, q, k = k*k, 2*k+1, k+1
  57.         a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
  58.         d = int(a / b)
  59.         d1 = int(a1 / b1)
  60.         while d == d1:
  61.             if len(string):
  62.                 c = string[0]
  63.                 string = string[1:]
  64.             else: c = ""
  65.             if len(c) == 0:
  66.                 r = False
  67.                 break
  68.             try: c = int(c)
  69.             except: continue
  70.             if c != d: out += t[c - (c > d)]
  71.             a, a1 = 10*(a%b), 10*(a1%b1)
  72.             d, d1 = int(a/b), int(a1/b1)
  73.     return out
  74.  
  75. def bf2pi(string):
  76.     random.seed()
  77.     out = ""
  78.     t = { '>':0, '<':1, '+':2, '-':3, '.':4, ',':5, '[':6, ']':7 }
  79.     k, a, b, a1, b1, cl, r = 2, 4, 1, 12, 4, random.randint(20,30), True
  80.     while r:
  81.         p, q, k = k*k, 2*k+1, k+1
  82.         a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
  83.         d = int(a / b)
  84.         d1 = int(a1 / b1)
  85.         while d == d1:
  86.             if cl:
  87.                 out+= str(d)
  88.                 cl -= 1
  89.             else:
  90.                 if len(string):
  91.                     c = string[0]
  92.                     string = string[1:]
  93.                 else: c = ""
  94.                 if len(c) == 0:
  95.                     r = False
  96.                     break
  97.                 try: c = t[c]
  98.                 except: continue
  99.                 out += str(c + (c >= d))
  100.                 cl = random.randint(2,7)
  101.             a, a1 = 10*(a%b), 10*(a1%b1)
  102.             d, d1 = int(a/b), int(a1/b1)
  103.     return "%s.%s"%(out[0],out[1:])
  104.  
  105. if __name__ == '__main__':
  106.     if len(sys.argv) == 1:
  107.         #reading from stdin
  108.         bf(pi2bf(sys.stdin.read()))
  109.  
  110.     elif sys.argv[1] == '-':
  111.         bf(pi2bf(" ".join(sys.argv[2:])))
  112.     elif sys.argv[1] == '-bf':
  113.         bf(" ".join(sys.argv[2:]))
  114.     elif sys.argv[1] == '--bf':
  115.         f = open(sys.argv[2])
  116.         bf(f.read())
  117.     elif sys.argv[1] == '--convert':
  118.         f = open(sys.argv[2])
  119.         print(bf2pi(f.read()))
  120.     elif sys.argv[1] == '-c':
  121.         print(bf2pi(" ".join(sys.argv[2:])))
  122.     elif sys.argv[1] == '--tobf':
  123.         f = open(sys.argv[2])
  124.         print(pi2bf(f.read()))
  125.     elif sys.argv[1] == '-2bf':
  126.         print(pi2bf(" ".join(sys.argv[2:])))
  127.     elif sys.argv[1] == '-h' or sys.argv[1] == '--help':
  128.         print("""pi language commands:
  129.                 * -bf: parses a bf command
  130.                 * --bf: parses a bf file
  131.                 * - : parses a pi number from command line
  132.                 * -h --help: displays dis help
  133.                 * --convert: convert a bf file into pi
  134.                 * -c: convert a bf command into pi
  135.                 * --tobf convert a pi file into bf
  136.                 * -2bf convert a pi command into bf""")
  137.     else:
  138.         f = open(sys.argv[1])
  139.         bf(pi2bf(f.read()))
Success #stdin #stdout 0.03s 10032KB
comments (?)
stdin
copy 
3.1415926535897932384226433232725028841271693992751358239749245923072164062
  822089986780348053431120629821483865332223366470908446395535832317223594083
  284831172502841037019385311052596446029489529303219642288009756259134461214
  751482337817834652812009021456285664234613486134553226482133236073603491413
  737242870066363155841744815239239622292545917053643278925902605113301301488
  204625213821429519415316024320522703627595939530921261373219226137931021185
  580744023794627495273518257527348912274384830113491298346743644406563430865
  2133494633522473749030217386093370277033921317659317670238267581846066440
stdout
copy 
Hello World!
https://ideone.com/TuFYy6
Copied from http://e...content-available-to-author-only...s.org/wiki/Pi
language:
Python (cpython 2.7.16)
created:
9 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!