bit.hex2ascii

ascii := the ascii representation of the value of hex (digits & capital-letters).
ascii is bit[:8], hex is bit[:4].

Signature

def hex2ascii ascii, hex @ dec_label, hex_label, nine4, end { ... }

Defined in bit/casting.fj — lines 42–57 (view on GitHub).

Complexity

• Time: 15@+7

• Space: 21@+30

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

Source

Click to view the macro body

def hex2ascii ascii, hex @ dec_label, hex_label, nine4, end {
    .zero 8, ascii
    .xor 3, ascii, hex
    .cmp 4, hex, nine4, dec_label, dec_label, hex_label
  dec_label:
    .xor ascii+3*dw, hex+3*dw
    .not 2, ascii + 4*dw    // ascii = 0x30
    ;end
  hex_label:
    .dec 3, ascii           // A-F is now 1-6
    .not ascii + 6*dw       // ascii = 0x40
    ;end
  nine4:
    .vec 4, 9
  end:
}

Depends on

• bit.cmp/6

• bit.dec

• bit.not/1

• bit.not/2

• bit.vec/2

• bit.xor/2

• bit.xor/3

• bit.zero/2

Used by

• bit.print_hex_uint.print_digit

Example uses

• bit.print_hex_uint.print_digit in bit/output.fj

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