49 lines
1.5 KiB
Plaintext
49 lines
1.5 KiB
Plaintext
func main[] : i64
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// https://brainfuck.org/sierpinski.b
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let src: str = "++++++++[>+>++++<<-]>++>>+<[-[>>+<<-]+>>]>+[-<<<[->[+[-]+>++>>>-<<]<[<]>>++++++[<<+++++>>-]+<<++.[-]<<]>.>+[>>]>+]"
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let src_len: i64 = str.len(src)
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let i = 0
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let memory: ptr = mem.alloc(30000)
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mem.zero(memory, 30000)
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let p = 0
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while i < src_len
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let op: u8 = src[i]
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if op == '>'
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p = p + 1
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else if op == '<'
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p = p - 1
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else if op == '+'
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str.set(memory, p, memory[p] + 1)
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else if op == '-'
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str.set(memory, p, memory[p] - 1)
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else if op == '.'
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io.print_char(memory[p])
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else if op == ','
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str.set(memory, p, io.read_char())
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else if op == '['
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if !memory[p]
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i = i + 1
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let opened = 0
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while i < src_len && !(src[i] == ']' && !opened)
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if src[i] == '['
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opened = opened + 1
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else if src[i] == ']'
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opened = opened - 1
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i = i + 1
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else if op == ']'
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if memory[p]
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i = i - 1
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let closed = 0
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while i >= 0 && !(src[i] == '[' && !closed)
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if src[i] == ']'
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closed = closed + 1
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else if src[i] == '['
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closed = closed - 1
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i = i - 1
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i = i + 1
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mem.free(memory) |