#!/bin/sh
exec ${GUILE-/usr/bin/guile} -e '(scripts bit-field-diagram)' -s $0 "$@" # -*- scheme -*-
!#
;;; bit-field-diagram --- Display bit-field diagrams in different ways

;; 	Copyright (C) 2002,2003 Free Software Foundation, Inc.
;;
;; This program 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 2, or
;; (at your option) any later version.
;;
;; 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 software; see the file COPYING.  If not, write to
;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
;; Boston, MA 02111-1307 USA
;;
;; As a special exception, the Free Software Foundation gives permission
;; for additional uses of the text contained in its release of GUILE.
;;
;; The exception is that, if you link the GUILE library with other files
;; to produce an executable, this does not by itself cause the
;; resulting executable to be covered by the GNU General Public License.
;; Your use of that executable is in no way restricted on account of
;; linking the GUILE library code into it.
;;
;; This exception does not however invalidate any other reasons why
;; the executable file might be covered by the GNU General Public License.
;;
;; This exception applies only to the code released by the
;; Free Software Foundation under the name GUILE.  If you copy
;; code from other Free Software Foundation releases into a copy of
;; GUILE, as the General Public License permits, the exception does
;; not apply to the code that you add in this way.  To avoid misleading
;; anyone as to the status of such modified files, you must delete
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;;; Author: Thien-Thi Nguyen <ttn@gnu.org>

;;; Commentary:

;; Usage: bit-field-diagram [ARGS]
;;
;; bit-field-diagram does something.
;;
;; Example: bit-field-diagram "((hello . 5) (there . 10))"
;;
;; TODO: Write it!

;;; Code:

(define-module (scripts bit-field-diagram)
  :autoload (scripts PROGRAM) (HVQC-MAIN)
  :use-module (ice-9 format)
  :export (bit-field-diagram))

(define name  car)
(define width cdr)

(define (bf-description<-string s)      ; alist ((NAME . WIDTH) ...)
  (with-input-from-string s
    (lambda () (read))))

(define (bit-field-diagram . args)
  (let ((bf-description (bf-description<-string (car args))))
    (format #t ",,|~:{~V@A|~},,\n"
            (map (lambda (pair)
                   (list (* 2 (width pair)) (name pair)))
                 bf-description))))

(define (main args)
  (HVQC-MAIN args (lambda (args)
                    (apply bit-field-diagram (cdr args)))
             '(usage . commentary)
             '(package . "Guile")))

;;; bit-field-diagram ends here
