def jpeg.zigzag

gralha-jpeg-decode@0.1.0.1 · jpeg.bend:96

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

96def jpeg.zigzag(index: U32) -> U32:
97  U.uints.nth(Con{0, Con{1, Con{8, Con{16, Con{9, Con{2, Con{3, Con{10, Con{17, Con{24, Con{32, Con{25, Con{18, Con{11, Con{4, Con{5, Con{12, Con{19, Con{26, Con{33, Con{40, Con{48, Con{41, Con{34, Con{27, Con{20, Con{13, Con{6, Con{7, Con{14, Con{21, Con{28, Con{35, Con{42, Con{49, Con{56, Con{57, Con{50, Con{43, Con{36, Con{29, Con{22, Con{15, Con{23, Con{30, Con{37, Con{44, Con{51, Con{58, Con{59, Con{52, Con{45, Con{38, Con{31, Con{39, Con{46, Con{53, Con{60, Con{61, Con{54, Con{47, Con{55, Con{62, Con{63, Nil{}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}, U32.to_nat(index), 0)