Not Quite So Repetitive Brainfuck (NQSRBF) is a simple extension to Brainfuck (BF). It extends four existing BF commands to reduce the repetition of characters.
BF defines the following commands, all of which operate identically in NQSRBF.
| BF Operator | NQSRBF Operator | Meaning |
|---|---|---|
| > | > | Increment the data pointer. |
| < | < | Decrement the data pointer. |
| + | + | Increment the byte at the data pointer. |
| - | - | Decrement the byte at the data pointer. |
| . | . | Output the byte at the data pointer. |
| , | , | Accept one byte of input, storing its value in the byte at the data pointer. |
| [ | [ | If the byte at the data pointer is zero, then instead of moving the instruction pointer forward to the next command, jump it forward to the command after the matching ] command. |
| ] | ] | If the byte at the data pointer is nonzero, then instead of moving the instruction pointer forward to the next command, jump it back to the command after the matching [ command. |
NQSRBF extends the following four BF commands, providing an optional hexadecimal argument prefix.
| NQSRBF Operator | Meaning |
|---|---|
| n> | Increment the data pointer by n. |
| n< | Decrement the data pointer by n. |
| n+ | Increment the byte at the data pointer by n. |
| n- | Decrement the byte at the data pointer by n. |
Thus:
++++++++++++++++++++++++++++++++++++++++++
Becomes:
2a+
The bf2nqsrbf script will convert a BF program into NQSRBF.
bf2nqsrbf < source.bf > source.nqsrbf
The nqsrbf2bf script will convert an NQSRBF prorgram info BF, which may then be run in your favorite BF interpreter.
nqsrbf2bf < source.nqsrbf > source.bf
The classic BF "Hello World!" example:
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.
Translated to NQSRBF via bf2nqsrbf:
a+[>7+>a+>3+>+4<-]>++.>+.7+..3+.>++.<<f+.>.3+.6-.8-.>+.>.
Written specifically for NQSRBF:
48+.1d+.7+..3+.4f-.37+.18+.3+.6-.8-.43-.