CoreModel.window_rounds: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/proofs/crypto/sha/packed/core_model.bend as CoreModel
Lines 81-92 of bend-collections@1.0.0.0/proofs/crypto/sha/packed/core_model.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/proofs/crypto/sha/packed/core_model.bend&start_line=81&end_line=92

import Base
import bend-collections@1.0.0.0/src/crypto/sha/packed/core.bend as Runtime
import bend-collections@1.0.0.0/src/crypto/sha/state.bend as S

# A fixed rolling window drops schedule words as soon as they are older than 16
# rounds. This avoids growing and reference-counting the reverse history list.
def window_rounds(n: Nat, win: Runtime.ShaWindow, ks: List<&2, U32>, s: S.State) -> S.State:
  match n win ks:
    case 0n _ _:
      s
    case 1n+q _ Nil{}:
      s
    case 1n+q Runtime.W{a, +b, c, d, e, f, +g, h, i, j, l, m, o, r, +t, +u} k <> kt:
      +w = (Runtime.small1(b) + g + Runtime.small0(t) + u : U32)
      window_rounds(q, Runtime.W{w, a, b, c, d, e, f, g, h, i, j, l, m, o, r, t}, kt,
        Runtime.step(s, k, w))

Uses (9):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  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=bend-collections@1.0.0.0/src/crypto/sha/packed/core.bend&name=ShaWindow
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/sha/packed/core.bend&name=small0
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/sha/packed/core.bend&name=small1
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/sha/packed/core.bend&name=step
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/sha/state.bend&name=State