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-;;; installed-scm-file
-
-;;;; Copyright (C) 1995, 1996 Free Software Foundation, Inc.
-;;;;
-;;;; This program is free software; you can redistribute it and/or modify
-;;;; it under the terms of the GNU General Public License as published by
-;;;; the Free Software Foundation; either version 2, or (at your option)
-;;;; any later version.
-;;;;
-;;;; This program is distributed in the hope that it will be useful,
-;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;;;; GNU General Public License for more details.
-;;;;
-;;;; You should have received a copy of the GNU General Public License
-;;;; along with this software; see the file COPYING. If not, write to
-;;;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-;;;;
-
-
-(define-module #/ice-9/hcons)
-
-
-;;; {Eq? hash-consing}
-;;;
-;;; A hash conser maintains a private universe of pairs s.t. if
-;;; two cons calls pass eq? arguments, the pairs returned are eq?.
-;;;
-;;; A hash conser does not contribute life to the pairs it returns.
-;;;
-
-(define-public (hashq-cons-hash pair n)
- (modulo (logxor (hashq (car pair) 4194303)
- (hashq (cdr pair) 4194303))
- n))
-
-(define-public (hashq-cons-assoc key l)
- (and l (or (and (pair? l)
- (pair? (car l))
- (pair? (caar l))
- (eq? (car key) (caaar l))
- (eq? (cdr key) (cdaar l))
- (car l))
- (hashq-cons-assoc key (cdr l)))))
-
-(define-public (hashq-cons-get-handle table key)
- (hashx-get-handle hashq-cons-hash hashq-cons-assoc table key #f))
-
-(define-public (hashq-cons-create-handle! table key init)
- (hashx-create-handle! hashq-cons-hash hashq-cons-assoc table key init))
-
-(define-public (hashq-cons-ref table key)
- (hashx-ref hashq-cons-hash hashq-cons-assoc table key #f))
-
-(define-public (hashq-cons-set! table key val)
- (hashx-set! hashq-cons-hash hashq-cons-assoc table key val))
-
-(define-public (hashq-cons table a d)
- (car (hashq-cons-create-handle! table (cons a d) #f)))
-
-(define-public (hashq-conser hash-tab-or-size)
- (let ((table (if (vector? hash-tab-or-size)
- hash-tab-or-size
- (make-doubly-weak-hash-table hash-tab-or-size))))
- (lambda (a d) (hashq-cons table a d))))
-
-
-
-
-(define-public (make-gc-buffer n)
- (let ((ring (make-list n #f)))
- (append! ring ring)
- (lambda (next)
- (set-car! ring next)
- (set! ring (cdr ring))
- next)))