Interpreter for BrainF**k programming language written in Elixir. This code has been written as a solution for one of the CodeWars challenge.
| Command | C code | Description |
|---|---|---|
| > | ++ptr | increment the data pointer |
| < | --ptr | decrement the data pointer |
| + | ++*ptr | increment the byte at the data pointer |
| - | --*ptr | decrement the byte at the data pointer |
| . | putchar(*ptr) | output the byte at the data pointer |
| , | *ptr=getchar() | accept one byte of input, storing its value in the byte at the data pointer |
| [ | while (*ptr) { | 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 |
(C) https://en.wikipedia.org/wiki/Brainfuck
To run the BrainF**k program use the function
BrainfMachine.eval(program, , input \\ "")
Parameters
- program: String with BrainF**k program code to evaluate.
- input: Optional string (bytes) that can be used as input values.
Returns
- Output buffer as string.
iex> BrainfMachine.eval(",>,>,+.<++.<+++.", "abc")
"ddd"
iex> BrainfMachine.eval(",>,[<+>-]<.", <<7, 8>>)
<<15>>
iex> BrainfMachine.eval("++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>++.")
"Hello World!\n"
Project has tests:
mix test