B64.b64.val: def of cswap-bend-cli@0.1.0.0
Import: import cswap-bend-cli@0.1.0.0/b64.bend as B64
Lines 112-119 of cswap-bend-cli@0.1.0.0/b64.bend: https://jend.leeeet.dev/read.txt?path=cswap-bend-cli@0.1.0.0/b64.bend&start_line=112&end_line=119

import Base

# 0..63 the sextet, 64 for `=`, 255 for anything else.
def b64.val(+c: U32) -> U32:
  sel(U32.is_ge(c, 65) && U32.is_le(c, 90), (c - 65 : U32),
  sel(U32.is_ge(c, 97) && U32.is_le(c, 122), (c - 71 : U32),
  sel(U32.is_ge(c, 48) && U32.is_le(c, 57), (c + 4 : U32),
  sel(U32.is_eq(c, 43), 62,
  sel(U32.is_eq(c, 47), 63,
  sel(U32.is_eq(c, 61), 64, 255))))))

Uses (8):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_eq
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_ge
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_le
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.sub
  https://jend.leeeet.dev/definition.txt?path=cswap-bend-cli@0.1.0.0/b64.bend&name=sel