def jpeg.extend

gralha-jpeg-decode@0.1.0.1 · jpeg.bend:80

import Base
import gralha-text-scan@0.1.0.1/scan.bend as U

80def jpeg.extend(+value: U32, +count: U32) -> U32:
81  +base = U32.shln(1, U32.to_nat(count))
82  U.choose(U32, U32.is_gt(count, 0) && U32.is_lt(value, (base / 2 : U32)), (value + 1 - base : U32), value)