bf − yet another Brainfuck interpreter
bf [−h] [options] <filename>
bf (’Yet another Brainfuck interpreter’) is a simple interpreter for the esoteric Brainfuck language.
−c<num>
Specify the number num of the last cell you are 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. Brainfuck interpreter by Urban Mueller used an array of 30000 bytes (−c29999).
Our default value is 9999. Usually you need less.
−i |
Output Brainfuck code input to stderr. |
This feature is useful if you can’t find out why some Brainfuck code doesn’t work the way it should e.g. ignored loops, or a Brainfuck character within a comment.
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. |
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−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:
0 (zero) Normal input using getchar(3).
1 Single−char input. You won’t see what you type.
2 Single−char input. You will see what you type.
3 The same as 1, but doesn’t allow escape characters if compiled with slang.
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.)
It’s not allowed to ’<’ below the first cell.
It’s not allowed to ’>’ beyond the last cell.
Stephan Beyer <s−beyer AT gmx DOT net>