diff options
Diffstat (limited to 'ice-9/mapping.scm')
-rw-r--r-- | ice-9/mapping.scm | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/ice-9/mapping.scm b/ice-9/mapping.scm new file mode 100644 index 000000000..9d9bb7aa6 --- /dev/null +++ b/ice-9/mapping.scm @@ -0,0 +1,120 @@ +;;; installed-scm-file + +;;;; Copyright (C) 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/mapping + :use-module #/ice-9/poe) + +(define-public mapping-hooks-type (make-record-type 'mapping-hooks '(get-handle + create-handle + remove))) + + +(define-public make-mapping-hooks (perfect-funcq 17 (record-constructor mapping-hooks-type))) +(define-public mapping-hooks? (record-predicate mapping-hooks-type)) +(define-public mapping-hooks-get-handle (record-accessor mapping-hooks-type 'get-handle)) +(define-public mapping-hooks-create-handle (record-accessor mapping-hooks-type 'create-handle)) +(define-public mapping-hooks-remove (record-accessor mapping-hooks-type 'remove)) + +(define-public mapping-type (make-record-type 'mapping '(hooks data))) +(define-public make-mapping (record-constructor mapping-type)) +(define-public mapping? (record-predicate mapping-type)) +(define-public mapping-hooks (record-accessor mapping-type 'hooks)) +(define-public mapping-data (record-accessor mapping-type 'data)) +(define-public set-mapping-hooks! (record-modifier mapping-type 'hooks)) +(define-public set-mapping-data! (record-modifier mapping-type 'data)) + +(define-public (mapping-get-handle map key) + ((mapping-hooks-get-handle (mapping-hooks map)) map key)) +(define-public (mapping-create-handle! map key . opts) + (apply (mapping-hooks-create-handle (mapping-hooks map)) map key opts)) +(define-public (mapping-remove! map key) + ((mapping-hooks-remove (mapping-hooks map)) map key)) + +(define-public (mapping-ref map key . dflt) + (cond + ((mapping-get-handle map key) => cdr) + (dflt => car) + (else #f))) + +(define-public (mapping-set! map key val) + (set-cdr! (mapping-create-handle! map key #f) val)) + + + +(define-public 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-public (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-public (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) make-vector))) + (make-hash-table-mapping (table-constructor size) + hash-proc + assoc-proc + delete-proc))) + |