bit.ascii2bin

if ascii is ‘0’/’1’, set bit to 0/1 (end error=0). else, set error=1.
ascii is bit[:8], and error(output-param),bin are bits.

Signature

def ascii2bin error, bin, ascii @ half_bin, return_error, copy_binary_value, end { ... }

Defined in bit/casting.fj — lines 69–87 (view on GitHub).

Complexity

• Time: 17@+24

• Space: 17@+24

See the complexity glossary for what @, w, dw, dbit, n mean.

Source

Click to view the macro body

def ascii2bin error, bin, ascii @ half_bin, return_error, copy_binary_value, end {
    .zero error
    .zero bin

    .cmp 7, ascii+dw, half_bin, return_error, copy_binary_value, return_error

    return_error:
        .not error
        ;end

    copy_binary_value:
        .xor bin, ascii
        ;end

  half_bin:
    .vec 7, 0x30>>1

  end:
}

Depends on

• bit.cmp/6

• bit.not/1

• bit.vec/2

• bit.xor/2

• bit.zero/1

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