ikarus/scheme/ikarus.load.ss

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;;; Ikarus Scheme -- A compiler for R6RS Scheme.
;;; Copyright (C) 2006,2007,2008 Abdulaziz Ghuloum
;;;
;;; This program is free software: you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License version 3 as
;;; published by the Free Software Foundation.
;;;
;;; 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 program. If not, see <http://www.gnu.org/licenses/>.
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(library (ikarus load)
(export load load-r6rs-top-level)
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(import
(except (ikarus) load)
(only (ikarus.compiler) compile-core-expr)
(only (psyntax library-manager)
serialize-all current-precompiled-library-loader)
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(only (psyntax expander) compile-r6rs-top-level)
(only (ikarus reader) read-initial read-script-source-file))
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(define-struct serialized-library (contents))
(define fasl-extension ".ikarus-fasl")
(define (load-serialized-library filename sk)
;;; TODO: check file last-modified date
(let ([ikfasl (string-append filename fasl-extension)])
(cond
[(not (file-exists? ikfasl)) #f]
[(<= (file-ctime ikfasl) (file-ctime filename))
(fprintf (current-error-port)
"WARNING: not using fasl file ~s because it is older \
than the source file ~s\n"
ikfasl
filename)
#f]
[else
(let ([x
(let ([p (open-file-input-port ikfasl)])
(let ([x (fasl-read p)])
(close-input-port p)
x))])
(if (serialized-library? x)
(apply sk (serialized-library-contents x))
(begin
(fprintf (current-error-port)
"WARNING: not using fasl file ~s because it was \
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compiled with a different instance of ikarus.\n"
ikfasl)
#f)))])))
(define (do-serialize-library filename contents)
(let ([ikfasl (string-append filename fasl-extension)])
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(fprintf (current-error-port) "Serializing ~s ...\n" ikfasl)
(let ([p (open-file-output-port ikfasl (file-options no-fail))])
(fasl-write (make-serialized-library contents) p)
(close-output-port p))))
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(define load-handler
(lambda (x)
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(eval x (interaction-environment))))
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(define read-and-eval
(lambda (p eval-proc)
(let ([x (read p)])
(unless (eof-object? x)
(eval-proc x)
(read-and-eval p eval-proc)))))
(define load
(case-lambda
[(x) (load x load-handler)]
[(x eval-proc)
(unless (string? x)
(die 'load "not a string" x))
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(unless (procedure? eval-proc)
(die 'load "not a procedure" eval-proc))
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(let ([p (open-input-file x)])
(let ([x (read-initial p)])
(unless (eof-object? x)
(eval-proc x)
(read-and-eval p eval-proc)))
(close-input-port p))]))
(define load-r6rs-top-level
(lambda (x how)
(let ([prog (read-script-source-file x)])
(let ([thunk (compile-r6rs-top-level prog)])
(case how
[(run) (thunk)]
[(compile)
(serialize-all
(lambda (file-name contents)
(do-serialize-library file-name contents))
(lambda (core-expr)
(compile-core-expr core-expr)))]
[else (error 'load-r6rs-top-level "invali argument" how)])))))
(current-precompiled-library-loader load-serialized-library)
)