https://github.com/ahorn/bf-interpreter

BF virtual machine written in C
https://github.com/ahorn/bf-interpreter

Last synced: 2 months ago
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BF virtual machine written in C

• Host: GitHub
• URL: https://github.com/ahorn/bf-interpreter
• Owner: ahorn
• Created: 2011-06-04T08:58:51.000Z (over 13 years ago)
• Default Branch: master
• Last Pushed: 2013-12-01T19:10:23.000Z (about 11 years ago)
• Last Synced: 2024-04-24T15:34:33.344Z (9 months ago)
• Language: C
• Homepage:
• Size: 105 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README

Awesome Lists containing this project

• AwesomeInterpreter - bf-interpreter

README

        
License:      GPL

Author:       A. Horn

Description:  BF virtual machine written in C

Installation: sudo make install

BF commands:

  >   increment the data pointer (to point to the next cell to the right).

  <   decrement the data pointer (to point to the next cell to the left).

  +   increment (increase by one) the byte at the data pointer.

  -   decrement (decrease by one) the byte at the data pointer.

  .   output the value of the byte at the data pointer.

  ,   accept one byte of input, storing its value in the byte at the data pointer.

  [   if the byte at the data pointer is zero, then instead of moving the instruction

      pointer forward to the next command, jump it forward to the command after

      the matching ] command*.

  ]   if the byte at the data pointer is nonzero, then instead of moving the instruction

      pointer forward to the next command, jump it back to the command after the

      matching [ command*.

Example:

+++++ +++++             // initialize counter (cell #0) to 10

[                       // use loop to set the next four cells to 70/100/30/10

    > +++++ ++          //    add  7 to cell #1

    > +++++ +++++       //    add 10 to cell #2 

    > +++               //    add  3 to cell #3

    > +                 //    add  1 to cell #4

    <<<< -              //    decrement counter (cell #0)

]                       //

> ++ .                  // print 'H'

> + .                   // print 'e'

+++++ ++ .              // print 'l'

.                       // print 'l'

+++ .                   // print 'o'

> ++ .                  // print ' '

<< +++++ +++++ +++++ .  // print 'W'

> .                     // print 'o'

+++ .                   // print 'r'

----- - .               // print 'l'

----- --- .             // print 'd'

> + .                   // print '!'

> .                     // print '\n'