/usr/share/uim/light-record.scm is in libuim-data 1:1.8.6+gh20161003.0.d63dadd-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 | ;;; light-record.scm: Lightweight record types
;;;
;;; Copyright (c) 2007-2013 uim Project https://github.com/uim/uim
;;;
;;; All rights reserved.
;;;
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions
;;; are met:
;;;
;;; 1. Redistributions of source code must retain the above copyright
;;; notice, this list of conditions and the following disclaimer.
;;; 2. Redistributions in binary form must reproduce the above copyright
;;; notice, this list of conditions and the following disclaimer in the
;;; documentation and/or other materials provided with the distribution.
;;; 3. Neither the name of authors nor the names of its contributors
;;; may be used to endorse or promote products derived from this software
;;; without specific prior written permission.
;;;
;;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
;;; IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
;;; THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
;;; PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
;;; CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
;;; EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
;;; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
;;; PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
;;; LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;; In contrast to SRFI-9 standard, this record library features:
;;
;; - Automatic accessor name generation (but lost naming scheme
;; selectability)
;;
;; - No memory overhead on each record instance such as record marker
;; and type information (but lost type detectability)
;;
;; - Selectable data backend implementation such as vector and list.
;; List backend enables sharing some tail part between multiple
;; record instances
;;
;; - Composable field-specs (since record definers are not syntax)
;;
;;
;; Specification:
;;
;; <record definition> must be placed on toplevel env.
;;
;; <record definition> ::= (define-vector-record <record name> <field specs>)
;; | (define-list-record <record name> <field specs>)
;; | (define-record-generic <record name> <field specs>
;; <list2record> <record-copy>
;; <record-ref> <record-set!>)
;;
;; <record name> ::= <identifier>
;; <list2record> ::= <procedure>
;; <record-copy> ::= <procedure>
;; <record-ref> ::= <procedure>
;; <record-set!> ::= <procedure>
;;
;; <field specs> ::= ()
;; | (<field spec> . <field specs>)
;;
;; <field spec> ::= <symbol>
;; | (<symbol>)
;; | (<symbol> <default value>)
;;
;; <default value> ::= <any Scheme object>
(require-extension (srfi 1 23))
(cond-expand
(uim)
(else
(require-extension (srfi 43)))) ;; vector-copy
(require "util.scm")
(define %HYPHEN-SYM (string->symbol "-"))
(define %list-set!
(lambda (lst index val)
(set-car! (list-tail lst index)
val)))
(define vector-copy
(if (symbol-bound? 'vector-copy)
vector-copy
(lambda (v)
(list->vector (vector->list v)))))
(define record-field-spec-name
(lambda (fld-spec)
(let ((name (or (safe-car fld-spec)
fld-spec)))
(if (symbol? name)
name
(error "invalid field spec")))))
(define record-field-spec-default-value
(compose safe-car safe-cdr))
(define make-record-spec-name
(lambda (rec-name)
(symbol-append 'record-spec- rec-name)))
(define make-record-constructor-name
(lambda (rec-name)
(symbol-append 'make- rec-name)))
(define make-record-duplicator-name
(lambda (rec-name)
(symbol-append rec-name %HYPHEN-SYM 'copy)))
(define make-record-getter-name
(lambda (rec-name fld-name)
(symbol-append rec-name %HYPHEN-SYM fld-name)))
(define make-record-setter-name
(lambda (rec-name fld-name)
(symbol-append rec-name %HYPHEN-SYM 'set- fld-name '!)))
(define %make-record-constructor
(lambda (rec-name fld-specs list->record)
(let ((defaults (map record-field-spec-default-value fld-specs))
(defaults-len (length fld-specs)))
(lambda init-lst
(if (null? init-lst)
(list->record defaults)
(let ((init-lst-len (length init-lst)))
(cond
((= init-lst-len defaults-len)
(list->record init-lst))
((< init-lst-len defaults-len)
(let* ((rest-defaults (list-tail defaults init-lst-len))
(complemented-init-lst (append init-lst rest-defaults)))
(list->record complemented-init-lst)))
(else
(error "invalid initialization list for record"
rec-name)))))))))
;; To suppress redundant closure allocation, accessors for same
;; <index, type> share identical procedure. And faster short-cut
;; procedures such as car are predefined.
(define %retrieve-record-accessor
(let ((pool `(((0 . ,list-ref) . ,car)
((1 . ,list-ref) . ,cadr)
((2 . ,list-ref) . ,caddr)
((0 . ,%list-set!) . ,set-car!)
((1 . ,%list-set!) . ,(lambda (l v)
(set-car! (cdr l) v)))
((2 . ,%list-set!) . ,(lambda (l v)
(set-car! (cddr l) v))))))
(lambda (index key accessor)
(let ((pool-key (cons index key)))
(cond
((assoc pool-key pool) => cdr)
(else
(set! pool (alist-cons pool-key accessor pool))
accessor))))))
(define %make-record-getter
(lambda (index record-ref)
(let ((getter (lambda (rec)
(record-ref rec index))))
(%retrieve-record-accessor index record-ref getter))))
(define %make-record-setter
(lambda (index record-set!)
(let ((setter (lambda (rec val)
(record-set! rec index val))))
(%retrieve-record-accessor index record-set! setter))))
(define-macro %define-record-getter
(lambda (rec-name fld-name index record-ref)
(let ((getter-name (make-record-getter-name rec-name fld-name)))
`(define ,getter-name (%make-record-getter ,index ,record-ref)))))
(define-macro %define-record-setter
(lambda (rec-name fld-name index record-set!)
(let ((setter-name (make-record-setter-name rec-name fld-name)))
`(define ,setter-name (%make-record-setter ,index ,record-set!)))))
;;(define-macro %define-record-accessors
;; (lambda (rec-name fld-specs record-ref record-set!)
;; (cons 'begin
;; (map (lambda (fld-name index)
;; `(begin
;; (%define-record-getter ,rec-name ,fld-name ,index
;; ,record-ref)
;; (%define-record-setter ,rec-name ,fld-name ,index
;; ,record-set!)))
;; (map record-field-spec-name fld-specs)
;; (iota (length fld-specs))))))
(define-macro define-record-generic
(lambda (rec-name fld-specs list->record record-copy record-ref record-set!)
`(begin
;; define record field specs
(define ,(make-record-spec-name rec-name) ,fld-specs)
;; define record object constructor
(define ,(make-record-constructor-name rec-name)
(%make-record-constructor ',rec-name ,fld-specs ,list->record))
;; define record object duplicator
(define ,(make-record-duplicator-name rec-name) ,record-copy)
;; define record field accessors
,(cons 'begin
(map (lambda (fld-name index)
`(begin
(%define-record-getter ,rec-name ,fld-name ,index
,record-ref)
(%define-record-setter ,rec-name ,fld-name ,index
,record-set!)))
(map record-field-spec-name (eval fld-specs (interaction-environment)))
(iota (length (eval fld-specs (interaction-environment)))))))))
(define-macro define-vector-record
(lambda (rec-name fld-specs)
`(define-record-generic
,rec-name ,fld-specs
list->vector vector-copy vector-ref vector-set!)))
(define-macro define-list-record
(lambda (rec-name fld-specs)
`(define-record-generic
,rec-name ,fld-specs
list-copy list-copy list-ref %list-set!)))
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