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def utf8.need

cswap-bend-cli@0.1.0.0 · b64.bend:51

import cswap-bend-cli@0.1.0.0/b64.bend as B64
import Base

51# The decoder state is (need, cp): continuation bytes still due and the code
52# point so far. These three give the next need, the next cp, and whether cp
53# is complete.
54def utf8.need(+b: U32, +need: U32) -> U32:
55  sel(U32.is_eq(need, 0), utf8.len(b), (need - 1 : U32))

Uses (5)

Used by (1)