#! /bin/sh
# -*-scheme-*-
GODIR=${GODIR-@GODIR@}
GUILEDIR=${GUILEDIR-@GUILEDIR@}
[ "$GODIR" = @"GODIR"@ ] && GODIR=guile
[ "$GUILEDIR" = @"GUILEDIR"@ ] && GUILEDIR=guile
export GUILE_AUTO_COMPILE=${GUILE_AUTO_COMPILE-0}
exec ${GUILE-guile} -L $GUILEDIR -C $GODIR -e '(mescc)' -s "$0" "$@"
!#

;;; Mes --- The Maxwell Equations of Software
;;; Copyright © 2016,2017 Jan Nieuwenhuizen <janneke@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; Mes 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 3 of the License, or (at
;;; your option) any later version.
;;;
;;; Mes 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 Mes.  If not, see <http://www.gnu.org/licenses/>.

;; The Maxwell Equations of Software -- John McCarthy page 13
;; http://www.softwarepreservation.org/projects/LISP/book/LISP%201.5%20Programmers%20Manual.pdf

#!
Run with Guile-1.8:
GUILE='~/src/guile-1.8/build/pre-inst-guile --debug -q' guile/mescc.scm
!#

(define-module (mescc)
  #:use-module (language c99 compiler)
  #:use-module (ice-9 rdelim)
  #:use-module (ice-9 pretty-print)
  #:export (main))

(define %prefix (if (string-prefix? "@PREFIX" "@PREFIX@") "" "@PREFIX@"))
(define %datadir (if (string-prefix? "@DATADIR" "@DATADIR@") "" "@DATADIR@"))
(define %docdir (if (string-prefix? "@DOCDIR" "@DOCDIR@") "doc/" "@DOCDIR@"))
(define %moduledir "module/")
(define %version (if (string-prefix? "@VERSION" "@VERSION@") "git" "@VERSION@"))
(module-define! (resolve-module '(language c99 compiler)) '%datadir %datadir)
(module-define! (resolve-module '(language c99 compiler)) '%docdir %docdir)
(module-define! (resolve-module '(language c99 compiler)) '%moduledir %moduledir)
(module-define! (resolve-module '(language c99 compiler)) '%prefix %prefix)
(module-define! (resolve-module '(language c99 compiler)) '%version %version)

(define (main arguments)
  (let* ((files (cdr arguments))
         (file (if (null? files) (string-append %docdir "examples/main.c")
                   (car files))))
    (cond ((equal? file "--help")
           (format (current-error-port) "Usage: mescc.scm [--help|--version|FILE] > a.out\n")
           (exit 0))
          ((equal? file "--version")
           (format (current-error-port) "mescc.scm (mes) ~a\n" %version)
           (exit 0)))
    (format (current-error-port) "input: ~a\n" file)
    (with-input-from-file file
      c99-input->elf)))

(format (current-error-port) "compiler loaded\n")
(format (current-error-port) "calling ~s\n" (cons 'main (command-line)))