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;;; runtime.scm -- Skribilo runtime system
;;;
;;; Copyright 2003, 2004 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
;;; Copyright 2005, 2006 Ludovic Court�s <ludovic.courtes@laas.fr>
;;;
;;; 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 of the License, 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 program; if not, write to the Free Software
;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
;;; USA.
(define-module (skribilo runtime)
;; FIXME: Useful procedures are scattered between here and
;; `(skribilo skribe utils)'.
:export (;; Utilities
strip-ref-base string-canonicalize
;; String writing
make-string-replace)
:autoload (skribilo parameters) (*ref-base*)
:use-module (skribilo lib)
:use-module (srfi srfi-13))
;;; ======================================================================
;;;
;;; U T I L I T I E S
;;;
;;; ======================================================================
;;FIXME: Remonter cette fonction
(define (strip-ref-base file)
(if (not (string? (*ref-base*)))
file
(let ((l (string-length (*ref-base*))))
(cond
((not (> (string-length file) (+ l 2)))
file)
((not (string-contains file (*ref-base*) 0 l))
file)
((not (char=? (string-ref file l) #\/))
file)
(else
(substring file (+ l 1) (string-length file)))))))
;; FIXME: Remonter cette fonction
(define (string-canonicalize old)
(let* ((l (string-length old))
(new (make-string l)))
(let loop ((r 0)
(w 0)
(s #f))
(cond
((= r l)
(cond
((= w 0)
"")
((char-whitespace? (string-ref new (- w 1)))
(substring new 0 (- w 1)))
((= w r)
new)
(else
(substring new 0 w))))
((char-whitespace? (string-ref old r))
(if s
(loop (+ r 1) w #t)
(begin
(string-set! new w #\-)
(loop (+ r 1) (+ w 1) #t))))
((or (char=? (string-ref old r) #\#)
(>= (char->integer (string-ref old r)) #x7f))
(string-set! new w #\-)
(loop (+ r 1) (+ w 1) #t))
(else
(string-set! new w (string-ref old r))
(loop (+ r 1) (+ w 1) #f))))))
;;; ======================================================================
;;;
;;; S T R I N G - W R I T I N G
;;;
;;; ======================================================================
;;
;; (define (%make-html-replace)
;; ;; Ad-hoc version for HTML, a little bit faster than the
;; ;; make-general-string-replace define later (particularily if there
;; ;; is nothing to replace since, it does not allocate a new string
;; (let ((specials (string->regexp "&|\"|<|>")))
;; (lambda (str)
;; (if (regexp-match specials str)
;; (begin
;; (let ((out (open-output-string)))
;; (dotimes (i (string-length str))
;; (let ((ch (string-ref str i)))
;; (case ch
;; ((#\") (display """ out))
;; ((#\&) (display "&" out))
;; ((#\<) (display "<" out))
;; ((#\>) (display ">" out))
;; (else (write-char ch out)))))
;; (get-output-string out)))
;; str))))
(define (%make-general-string-replace lst)
;; The general version
(let ((chars (make-hash-table)))
;; Setup a hash table equivalent to LST.
(for-each (lambda (chr)
(hashq-set! chars (car chr) (cadr chr)))
lst)
;; Help the GC.
(set! lst #f)
(lambda (str)
(let ((out (open-output-string)))
(string-for-each (lambda (ch)
(let ((res (hashq-ref chars ch #f)))
(display (if res res ch) out)))
str)
(get-output-string out)))))
(define string->html
(%make-general-string-replace '((#\" """) (#\& "&") (#\< "<")
(#\> ">"))))
(define (make-string-replace lst)
(let ((l (sort lst (lambda (r1 r2) (char<? (car r1) (car r2))))))
(cond
((equal? l '((#\" """) (#\& "&") (#\< "<") (#\> ">")))
string->html)
(else
(%make-general-string-replace lst)))))
|
