brainfuckinterpreter
brainfuckinterpreter in golang
Implementation Details
Program handles tokens +, -, [, ] Developer can extend functionality as required.
How it run
At root run followings two commands
go build .
./bfinterpreter
======================
Default Interpreter size is 10. 10
Available Tokens: +,-,[,]
Type 'exit' to exit.
======================
bf>
Enter sequence of + or - or [] [ will lead to inner loop until ]. Loop calculation is escaped or considered based on stack pointer value at the moment. Enter "exit" to exit
It will output state of stack.
How to run tests
Run go test -count=1 ./... to run tests
Extentend as below
Create Token which implements Token interface
type Token interface {
Expr(bs *ByteStack) (err error)
}
example adding new token > is as simple as
bfinterpreter.AddToken(">", NewGreater())
where Greater implements Token
type Greater struct {
}
func NewGreater() *Greater {
return &Greater{}
}
func (a Greater) Expr(bs *bfinterpreter.ByteStack) (err error) {
t, err := bs.Pop()
if err != nil {
return fmt.Errorf("Failed to read ByteStack: %s", err.Error())
}
t = t - 1
bs.Push(t)
return nil
}
Few Example Runs
bf>+++++++++++++++++++++++++++++++++++++
37000000000
bf>+++++++++
9000000000
bf>+++++++++++++++++++------------------
1000000000
bf>+++++++++++++++------
9000000000
bf>[+++++++]++++++++++++++-----[+]
10000000000
bf>[+]++++++++++++-----
7000000000