module/language/bytecode/spec.scm

   1 ;;; Bytecode
   2
   3 ;; Copyright (C) 2013 Free Software Foundation, Inc.
   4
   5 ;;;; This library is free software; you can redistribute it and/or
   6 ;;;; modify it under the terms of the GNU Lesser General Public
   7 ;;;; License as published by the Free Software Foundation; either
   8 ;;;; version 3 of the License, or (at your option) any later version.
   9 ;;;;
  10 ;;;; This library is distributed in the hope that it will be useful,
  11 ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 ;;;; Lesser General Public License for more details.
  14 ;;;;
  15 ;;;; You should have received a copy of the GNU Lesser General Public
  16 ;;;; License along with this library; if not, write to the Free Software
  17 ;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  18
  19 ;;; Code:
  20
  21 (define-module (language bytecode spec)
  22   #:use-module (system base language)
  23   #:use-module (system vm loader)
  24   #:use-module (ice-9 binary-ports)
  25   #:export (bytecode))
  26
  27 (define (bytecode->value x e opts)
  28   (let ((thunk (load-thunk-from-memory x)))
  29     (if (eq? e (current-module))
  30         ;; save a cons in this case
  31         (values (thunk) e e)
  32         (save-module-excursion
  33          (lambda ()
  34            (set-current-module e)
  35            (values (thunk) e e))))))
  36
  37 (define-language bytecode
  38   #:title       "Bytecode"
  39   #:compilers   `((value . ,bytecode->value))
  40   #:printer     (lambda (bytecode port) (put-bytevector port bytecode))
  41   #:reader      get-bytevector-all
  42   #:for-humans? #f)