ABrainFuck

Advanced brainfuck virtual machine implementation.

The advanced brainfuck allows a new great feature: it can open files!

In unix-like system, it means you can manage stdin stdout but also any files read/write, which is great! you can do a lot of things, such as read the /dev/random to get random numbers, or /proc/driver/rtc to get a time!

Brief documentation

the operators are mostly the same, just an important difference with ',' and '.': it does not access the stdin, but the current open file (by default stdout, so ',' does nothing).

to open a file (/dev/stdin for instance), you can use the switch operator '~'. It will open the file with the address corresponding to the string starting at the current memory pointer position (which should be ended by \0).

Once open, you are in "file mode" the '.' operation copy from the file to the memory, and the ',' operation copy from the memory to the file. To switch back to "memory mode", reuse the '~' operator. In this case the operators are reversed, '.' copy from the memory to the file and ',' copy from the file to the memory.

Each time you read/write a file in memory mode, the file pointer is automatically shifted by +1.

Each you read/write the memory in file mode, the memory pointer is automatically shifted by +1.

If you are in file mode, the reading overwrite the memory were was the pointer, so the file address. If you switch back to memory, you can shift the memory pointer and still get data from the file with the operator ','. But to shift the file pointer by a custom value, you need to reopen it.

for debug, the # dump the memory and \ is a break.

Have fun!

Compilation

g++ ABrainFuck.cc -o AbrainFuck

Usage

Normal mode ./ABrainFuck myscript.abf

Debug mode ./ABrainFuck myscript.abf -md

The TapTempo.abf program

TapTempo.abf is a clone of taptempo, completing the huge list of taptempo ports you can find here: https://linuxfr.org/users/ms-mac/liens/pour-celles-qui-ne-connaissent-pas-tap-tempo

example:

preparation of the stdout address:

/
>+++
[>+++
[<<+++++>>-]<-]
<++.

d
>
>+++++
[>+++++
[<<++++>>-]<-]
<.

e
>
>+++++
[>+++++
[<<++++>>-]<-]
<+.

v
>
>++++
[>+++++
[<<++++++>>-]<-]
<--.

/
>
>+++
[>+++
[<<+++++>>-]<-]
<++.

s
>
>+++++
[>+++++
[<<+++++>>-]<-]
<----------.

t
[>+>+<<-]
>>[-<<+>>]<+.

d
>
>+++++
[>+++++
[<<++++>>-]<-]
<.

o
>
>++++
[>+++++
[<<++++++>>-]<-]
<---------.

u
>
>++++
[>+++++
[<<++++++>>-]<-]
<---.

t
>
>+++++
[>+++++
[<<+++++>>-]<-]
<---------.

\0
>

preparation of the stdin address
/
>
>+++
[>+++
[<<+++++>>-]<-]
<++.

d
>
>+++++
[>+++++
[<<++++>>-]<-]
<.

e
>
>+++++
[>+++++
[<<++++>>-]<-]
<+.

v
>
>++++
[>+++++
[<<++++++>>-]<-]
<--.

/
>
>+++
[>+++
[<<+++++>>-]<-]
<++.

s
>
>+++++
[>+++++
[<<+++++>>-]<-]
<----------.

t
[>+>+<<-]
>>[-<<+>>]<+.

d
>
>+++++
[>+++++
[<<++++>>-]<-]
<.

i
>
>++++
[>+++++
[<<+++++>>-]<-]
<+++++.

n
>
>++
[>+++++
[<<+++++++++++>>-]<-]
<.

\0
>

return to the begining
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< it cannot be inferior to 0 in this VM
go to stdin address
>>>>>>>>>>>>
open it, take 4 characters, in file mode it overwrite the address string, go back in memory mode
~....~
<<<<<<<<<<<<<<<<<<<<< go to the begining, then open stdout, back to memory mode
~~ print the memory
.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>

return to the begining
<<<<<<<<<<<<<<<<<<<<<<<<<<<<< it cannot be inferior of 0 in this VM

open stdin and take 4 characters, place them in memory, and go back in memory mode
~....~
<<<<<<<<< go back to the begining
~~
.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>.>