Brainfuck | Brainfuck interpreters | Interpreter library
kandi X-RAY | Brainfuck Summary
kandi X-RAY | Brainfuck Summary
This repository contains various [brainfuck] stuff. The classic description of BF is the C translation below, the opcode column is the direct translation used by my Tritium interpreter. | Opcode | Brainfuck | C | | -------|:-----------:|-----------------------| | T_MOV | > | ++ptr; | | T_MOV | < | --ptr; | | T_ADD | + | ++*ptr; | | T_ADD | - | --*ptr; | | T_WHL | [ | while (*ptr) { | | T_END | ] | } | | T_PRT | . | putchar(*ptr); | | T_INP | , | ptr[0] = getchar(); |. There are several BF interpreters and tools in this repository.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of Brainfuck
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Trending Discussions on Brainfuck
QUESTION
Note: my question is very specific, apologies if the title isn't clear enough as to what the problem is.
I'm creating a pixel art editor application using Canvas, and the pixel art data is saved into a Room database.
Here's the canvas code:
...ANSWER
Answered 2021-Dec-11 at 06:45This bug was fixed by calling invalidate()
on the Fragment's Canvas property after the user taps the back button. It took me a couple of days to get to fix this, so I'm posting an answer here in case someone has a similar bug.
QUESTION
I am implementing a brainfuck interpreter in Javascript. I am representing the memory with an array and I would like to have the option to limit the array indexes within a range. If the index is outside of this range, I want it to go over or under the limits. I'm having a little trouble describing the problem correctly. Here is an example of what I am thinking of:
...ANSWER
Answered 2021-Nov-20 at 13:12Basically modulo is the operation you're looking for. Just that you're making it a bit trickier, since you also want to support negative numbers, so a little bit of "rotating" the modulo result needs to be added to the "formula".
This function below should do the trick:
QUESTION
I got some problems with my tests.
In my case, I have 2 components:
...ANSWER
Answered 2021-Nov-17 at 00:42When you add a default property value on AComponent
it's forcing the inherited constructor to be called. This occurs because class properties that have an initial value are effectively moved into the constructor during Typescript transpilation
You probably shouldn't have a constructor on the abstract class, but at the very least you'll need to call it by overriding that constructor in AComponent
, passing the FormBuilder
as a param
QUESTION
I am trying to make a brainf*** interpreter in c++. when I test it with the Esolang hello world example:
...ANSWER
Answered 2021-Oct-09 at 18:29Thanks for your help everyone, but I found the solution.
I need to change this:
QUESTION
I need to learn how to display this text in BrainFuck among other programming languages, BrainFuck included. Also, "Why did StackOverflow became a huge sellout to a CCCP-controlled corporation?" Would be of great help as well.
...ANSWER
Answered 2021-Jun-03 at 03:49You may use the following code in Brainfuck to generate that.
QUESTION
I know nothing about grammars or that type of stuff and i don't know how to make brainfuck work in Atom. I have installed script and brainfuck, but if I try to run it just prints the error "Command not configured for Brainfuck!". can anybody please help?
...ANSWER
Answered 2021-May-18 at 09:17here's what i have found (https://atom.io/packages/language-brainfuck) hope that works.
if it doesn't so you may try downloading an interpreter manually a link of bf interpreter is here .
QUESTION
I decided to write another one BF interpreter in order of personal development, and despite the fact that this is his second version written from scratch, one way or another it doesn't work correctly with cycles. Please tell me how this can be rewritten, or what is the logical problem. Below is the code and examples of programs in BF.
...ANSWER
Answered 2021-Mar-19 at 07:17']' should jump back if cell is nonzero
Hugely convoluted approach; you want to put the matches in the brackets array so it's like
QUESTION
OBS: All pseudo code or real code (except brainfuck) are accepted as response
Assuming that I have a black and white logo, as a picture file, where there is some noise (not 100% black and white and no pixels are 100% black too)
If I wanted to change the black to another predefined color how would I go about that?
I have tried to find the difference between the true white pixels and the other and tried to shift the pixel in that favor, but it ends some total noise.
...ANSWER
Answered 2021-Mar-10 at 13:50you can use Adaptive thresholding to convert your image to a binary image. Then map black and white to desire color.
QUESTION
I did some looking around to find an assembly visualizer kind of how Regex sites show you explain it, or the BF (language) visualizer when shows you how its going through the stack, is there something like this for assembly somewhere online?
Brainf**k example: https://fatiherikli.github.io/brainfuck-visualizer/
...ANSWER
Answered 2021-Feb-13 at 09:22Unlike BF, real CPU assembly languages usually don't have huge repeats of instructions that need to be summarized; the instruction itself is already a compact but readable statement of what it does. If you want higher level than that, use a decompiler to turn it into C. (Often being able to recognize loops and write them in a C-like fashion, not just if()goto
for compare/branch instructions.)
Even more importantly, most asm isn't known to be a whole program, it's usually a function with unknown register values as inputs, so tracing on the level of knowing where every pointer is pointing is not possible, not allowing the kind of analysis in the BF visualizer example. BF only has a single "cursor" that code has to constantly move around to work on multiple "variables", but regular asm doesn't suck that much and is usually closer to the level that the BF visualizer summarizes into.
A good disassembler (like objconv
for x86/x86-64) will show branch targets, making it fairly possible to identify loops (because backward conditional branches are often loops).
Branching is another thing that makes real asm harder to statically trace than a regex or BF. BF branching is limited to structured nesting via [ ]
, but CPU asm is not.
A good asm debugger will have a way to show you the registers, ideally highlighting the one(s) that changed since the last breakpoint or single-step. You can usually configure the same for memory, at worst with a manual GDB command like display /8gx $rsp
to show 8 qwords (g = Giant, in heX) above the stack pointer on x86-64 before every prompt.
So you can follow what's going on by single-stepping the asm.
The https://godbolt.org/ compiler explorer's asm window has mouseover for x86 instruction mnemonics with a one-line reminder of what they do; useful if you forget which registers are implicit operands for instructions like cdq
or idiv
.
QUESTION
I'm writing a brainfuck interpreter in NASM, where code is supplied as a command line argument to the program. I'm trying to test looping, but GDB doesn't like my input. For example, this executes error-free when run on its own:
...ANSWER
Answered 2021-Feb-09 at 05:13Is there a way to have GDB take what I give literally to start, and not attempt to do any redirection/interpretation of the arguments?
GDB isn't doing any interpretation, bash
does. Using single-quotes instead of double-quotes may fix that.
(I wasn't able to replicate the problem using GDB-10.0 and bash-5.1.4 with double quotes though.)
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