Guile-hoot/lib/hoot/bitwise.scm

;;; Bitwise arithmetic
;;; Copyright (C) 2024 Igalia, S.L.
;;;
;;; Licensed under the Apache License, Version 2.0 (the "License");
;;; you may not use this file except in compliance with the License.
;;; You may obtain a copy of the License at
;;;
;;;    http://www.apache.org/licenses/LICENSE-2.0
;;;
;;; Unless required by applicable law or agreed to in writing, software
;;; distributed under the License is distributed on an "AS IS" BASIS,
;;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
;;; See the License for the specific language governing permissions and
;;; limitations under the License.

;;; Commentary:
;;;
;;; R7RS (scheme cxr) implementation
;;;
;;; Code:

(library (hoot bitwise)
  (export logand logior logxor lognot logtest logbit? ash)
  (import (hoot primitives))

  (define-syntax-rule (define-associative-eta-expansion f %f)
    (define f
      (case-lambda
       (() (%f))
       ((x) (%f x))
       ((x y) (%f x y))
       ((x y . z) (apply f (%f x y) z)))))

  (define-associative-eta-expansion logand %logand)
  (define-associative-eta-expansion logior %logior)
  (define-associative-eta-expansion logxor %logxor)

  (define (lognot x) (%lognot x))
  (define (logtest j k) (%logtest j k))
  (define (logbit? idx k) (%logbit? idx k))

  (define (ash x y) (%ash x y)))