bf(1)

💖 bf — yet another Brainfuck interpreter 💖

okay bestie, so this is bf(1), from the devel section, and it's literally a Brainfuck interpreter. Yes, THAT Brainfuck. The esolang. Sit down, we're doing this together. 🫶

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✨ NAME ✨

bf — yet another Brainfuck interpreter

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🎀 SYNTAX 🎀

bf [-h] [options] <filename>

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🦋 DESCRIPTION 🦋

bf ('Yet another Brainfuck interpreter') is a simple interpreter for the esoteric Brainfuck language. That's it. That's the whole vibe. She interprets. She's simple. She slays. 💅

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👑 OPTIONS 👑

• -c<num> — specify the number num of the last cell you're allowed to use in your Brainfuck program.

So if you use -c0 (or just -c), you'll have one cell (one byte in memory) to use on your tape. The Brainfuck interpreter by Urban Mueller used an array of 30000 bytes (-c29999). Our default value is 9999. Usually you need less. ngl, 9999 cells is already a lot of real estate. 🏡

• -i — output Brainfuck code input to stderr.

This feature is useful if you can't figure out why some Brainfuck code doesn't work the way it should, e.g. ignored loops, or a Brainfuck character hiding inside a comment. 😭 (not the sneaky comment character!!)

Note: up to 32 +, -, < and > are summarized and displayed as only one. This feature was introduced in version 20040423.

• -n — some Brainfuck contests specify a 0 byte as End Of Input. So -n translates a \n byte input into a 0 byte input.

Disadvantage: the input can only consist of one line. 💀

• -w — disallow byte wrap-around. This causes errors if you try to decrement (-) a 0x00 byte or to increment (+) a 0xFF byte.

This feature is useful if you want to take part in Brainfuck contests where such wrapping-around is disallowed. By default (without -w), incrementing 0xFF results in 0x00 and decrementing 0x00 results in 0xFF. 🌀

• -,<mode> — specify input mode. <mode> can be:
  1. 0 (zero) Normal input using getchar(3).
  2. 1 Single-char input. You won't see what you type. 🙈
  3. 2 Single-char input. You will see what you type. 👀
  4. 3 The same as 1, but doesn't allow escape characters if compiled with slang.
  5. 4 The same as 2, but doesn't allow escape characters, if compiled with slang. (recommended) ⭐

Default is 0. (In some versions the default was 4.)

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🌸 LIMITATIONS 🌸

bestie, these are the rules. no cap.

• It's not allowed to < below the first cell. 🚫
• It's not allowed to > beyond the last cell. 🚫

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💜 AUTHORS 💜

Stephan Beyer <s-beyer@gmx.net> — the icon, the legend, the moment. 👑

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and that's the whole page, bestie!! 🎀 this version is from 20041219, written by Stephan Beyer <s-beyer@gmx.net>, and it lives in the devel section of the manual — go forth and brainfuck responsibly, mwah 💋✨