;;; installed-scm-file ;;;; Copyright (C) 1996, 2001 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, Inc., 59 Temple Place, Suite 330, ;;;; Boston, MA 02111-1307 USA ;;;; ;;;; As a special exception, the Free Software Foundation gives permission ;;;; for additional uses of the text contained in its release of GUILE. ;;;; ;;;; The exception is that, if you link the GUILE library with other files ;;;; to produce an executable, this does not by itself cause the ;;;; resulting executable to be covered by the GNU General Public License. ;;;; Your use of that executable is in no way restricted on account of ;;;; linking the GUILE library code into it. ;;;; ;;;; This exception does not however invalidate any other reasons why ;;;; the executable file might be covered by the GNU General Public License. ;;;; ;;;; This exception applies only to the code released by the ;;;; Free Software Foundation under the name GUILE. If you copy ;;;; code from other Free Software Foundation releases into a copy of ;;;; GUILE, as the General Public License permits, the exception does ;;;; not apply to the code that you add in this way. To avoid misleading ;;;; anyone as to the status of such modified files, you must delete ;;;; this exception notice from them. ;;;; ;;;; If you write modifications of your own for GUILE, it is your choice ;;;; whether to permit this exception to apply to your modifications. ;;;; If you do not wish that, delete this exception notice. ;;;; (define-module (ice-9 mapping) :use-module (ice-9 poe) :export (mapping-hooks-type make-mapping-hooks mapping-hooks? mapping-hooks-get-handle mapping-hooks-create-handle mapping-hooks-remove mapping-type make-mapping mapping? mapping-hooks mapping-data set-mapping-hooks! set-mapping-data! mapping-get-handle mapping-create-handle! mapping-remove! mapping-ref mapping-set! hash-table-mapping-hooks make-hash-table-mapping hash-table-mapping)) (define mapping-hooks-type (make-record-type 'mapping-hooks '(get-handle create-handle remove))) (define make-mapping-hooks (perfect-funcq 17 (record-constructor mapping-hooks-type))) (define mapping-hooks? (record-predicate mapping-hooks-type)) (define mapping-hooks-get-handle (record-accessor mapping-hooks-type 'get-handle)) (define mapping-hooks-create-handle (record-accessor mapping-hooks-type 'create-handle)) (define mapping-hooks-remove (record-accessor mapping-hooks-type 'remove)) (define mapping-type (make-record-type 'mapping '(hooks data))) (define make-mapping (record-constructor mapping-type)) (define mapping? (record-predicate mapping-type)) (define mapping-hooks (record-accessor mapping-type 'hooks)) (define mapping-data (record-accessor mapping-type 'data)) (define set-mapping-hooks! (record-modifier mapping-type 'hooks)) (define set-mapping-data! (record-modifier mapping-type 'data)) (define (mapping-get-handle map key) ((mapping-hooks-get-handle (mapping-hooks map)) map key)) (define (mapping-create-handle! map key . opts) (apply (mapping-hooks-create-handle (mapping-hooks map)) map key opts)) (define (mapping-remove! map key) ((mapping-hooks-remove (mapping-hooks map)) map key)) (define (mapping-ref map key . dflt) (cond ((mapping-get-handle map key) => cdr) (dflt => car) (else #f))) (define (mapping-set! map key val) (set-cdr! (mapping-create-handle! map key #f) val)) (define hash-table-mapping-hooks (let ((wrap (lambda (proc) (lambda (1st . rest) (apply proc (mapping-data 1st) rest))))) (perfect-funcq 17 (lambda (hash-proc assoc-proc delete-proc) (let ((procs (list hash-proc assoc-proc delete-proc))) (cond ((equal? procs `(,hashq ,assq ,delq!)) (make-mapping-hooks (wrap hashq-get-handle) (wrap hashq-create-handle!) (wrap hashq-remove!))) ((equal? procs `(,hashv ,assv ,delv!)) (make-mapping-hooks (wrap hashv-get-handle) (wrap hashv-create-handle!) (wrap hashv-remove!))) ((equal? procs `(,hash ,assoc ,delete!)) (make-mapping-hooks (wrap hash-get-handle) (wrap hash-create-handle!) (wrap hash-remove!))) (else (make-mapping-hooks (wrap (lambda (table key) (hashx-get-handle hash-proc assoc-proc table key))) (wrap (lambda (table key) (hashx-create-handle hash-proc assoc-proc table key))) (wrap (lambda (table key) (hashx-get-handle hash-proc assoc-proc delete-proc table key))))))))))) (define (make-hash-table-mapping table hash-proc assoc-proc delete-proc) (make-mapping (hash-table-mapping-hooks hash-proc assoc-proc delete-proc) table)) (define (hash-table-mapping . options) (let* ((size (or (and options (number? (car options)) (car options)) 71)) (hash-proc (or (kw-arg-ref options :hash-proc) hash)) (assoc-proc (or (kw-arg-ref options :assoc-proc) (cond ((eq? hash-proc hash) assoc) ((eq? hash-proc hashv) assv) ((eq? hash-proc hashq) assq) (else (error 'hash-table-mapping "Hash-procedure specified with no known assoc function." hash-proc))))) (delete-proc (or (kw-arg-ref options :delete-proc) (cond ((eq? hash-proc hash) delete!) ((eq? hash-proc hashv) delv!) ((eq? hash-proc hashq) delq!) (else (error 'hash-table-mapping "Hash-procedure specified with no known delete function." hash-proc))))) (table-constructor (or (kw-arg-ref options :table-constructor) (lambda (len) (make-vector len '()))))) (make-hash-table-mapping (table-constructor size) hash-proc assoc-proc delete-proc)))