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;;; Guile VM program functions
;;; Copyright (C) 2001, 2009 Free Software Foundation, Inc.
;;;
;;; This library is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Lesser General Public
;;; License as published by the Free Software Foundation; either
;;; version 3 of the License, or (at your option) any later version.
;;;
;;; This library 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
;;; Lesser General Public License for more details.
;;;
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with this library; if not, write to the Free Software
;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
;;; Code:
(define-module (system vm program)
#:export (make-program
arity:nargs arity:nrest arity:nlocs
make-binding binding:name binding:boxed? binding:index
binding:start binding:end
source:addr source:line source:column source:file
program-bindings program-sources program-source
program-properties program-property program-documentation
program-name program-arguments
program-arity program-meta
program-objcode program? program-objects
program-module program-base program-free-variables))
(load-extension "libguile" "scm_init_programs")
(define arity:nargs car)
(define arity:nrest cadr)
(define arity:nlocs caddr)
(define (make-binding name boxed? index start end)
(list name boxed? index start end))
(define (binding:name b) (list-ref b 0))
(define (binding:boxed? b) (list-ref b 1))
(define (binding:index b) (list-ref b 2))
(define (binding:start b) (list-ref b 3))
(define (binding:end b) (list-ref b 4))
(define (source:addr source)
(car source))
(define (source:file source)
(cadr source))
(define (source:line source)
(caddr source))
(define (source:column source)
(cdddr source))
(define (program-property prog prop)
(assq-ref (program-properties proc) prop))
(define (program-documentation prog)
(assq-ref (program-properties prog) 'documentation))
(define (program-arguments prog)
(let ((bindings (program-bindings prog))
(nargs (arity:nargs (program-arity prog)))
(rest? (not (zero? (arity:nrest (program-arity prog))))))
(if bindings
(let ((args (map binding:name (list-head bindings nargs))))
(if rest?
`((required . ,(list-head args (1- (length args))))
(rest . ,(car (last-pair args))))
`((required . ,args))))
#f)))
(define (program-bindings-as-lambda-list prog)
(let ((bindings (program-bindings prog))
(nargs (arity:nargs (program-arity prog)))
(rest? (not (zero? (arity:nrest (program-arity prog))))))
(if (not bindings)
(if rest? (cons (1- nargs) 1) (list nargs))
(let ((args (map binding:name (list-head bindings nargs))))
(if rest?
(apply cons* args)
args)))))
(define (write-program prog port)
(format port "#<program ~a ~a>"
(or (program-name prog)
(and=> (program-source prog 0)
(lambda (s)
(format #f "~a at ~a:~a:~a"
(number->string (object-address prog) 16)
(or (source:file s) "<unknown port>")
(source:line s) (source:column s))))
(number->string (object-address prog) 16))
(program-bindings-as-lambda-list prog)))
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