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: String = "++++++++[>+>++++<<-]>++>>+<[-[>>+<<-]+>>]>+[-<<<[->[+[-]+>++>>>-<<]<[<]>>++++++[<<+++++>>-]+<<++.[-]<<]>.>+[>>]>+]"
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let src_len: I64 = str.len(src)
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let i: I64 = 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: I64 = 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, c.getchar())
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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: I64 = 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: I64 = 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) |