README.md

In dirkschumacher/RcppBrainfuck: Compile Brainfuck to C++ from R

RcppBrainfuck

The goal of RcppBrainfuck is to compile brainfuck code to C++ code that can be run from R.

NOT ENTERPRISE READY

Installation

You can install the released version of RcppBrainfuck from CRAN with:

remotes::install_github("dirkschumacher/RcppBrainfuck")

The package essentially just implements the translated brainfuck \<-> C OP codes from Wikipedia. It is just for fun and was an evening hack.

Example

This is a basic example which shows you how to solve a common problem:

library(RcppBrainfuck)

Here is a “Hello World” program taken from Wikipedia:

code <- "++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>++."
hello <- compile(code)
invisible(hello())
#> Hello World!

But you can also communicate with the Brainfuck code using a shared Memory.

# add 2 to the first cell and then add 3 to the second cell
# and then while the second cell is not 0, decrement it and increment the first one
code <- "++>+++[<+>-]" 
add <- compile(code)
cells <- add()
as.integer(cells[[1L]])
#> [1] 5

In order to input values we need to construct our own cell raw array and pass it to the function.

cells2 <- add(cells)
# passing in 7 for the first value we expect 10 as the final result
as.integer(cells2[[1L]])
#> [1] 10

References

• https://en.wikipedia.org/wiki/Brainfuck

Related Projects

• https://bitbucket.org/richierocks/brainfuck

dirkschumacher/RcppBrainfuck documentation built on Nov. 4, 2019, 10:32 a.m.