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Diffstat (limited to 'src/stklos/source.stk')
| -rw-r--r-- | src/stklos/source.stk | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/src/stklos/source.stk b/src/stklos/source.stk new file mode 100644 index 0000000..a3102c1 --- /dev/null +++ b/src/stklos/source.stk @@ -0,0 +1,191 @@ +;;;; +;;;; source.stk -- Skibe SOURCE implementation stuff +;;;; +;;;; Copyright © 2003-2004 Erick Gallesio - I3S-CNRS/ESSI <eg@essi.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. +;;;; +;;;; Author: Erick Gallesio [eg@essi.fr] +;;;; Creation date: 3-Sep-2003 12:22 (eg) +;;;; Last file update: 27-Oct-2004 20:09 (eg) +;;;; + + + +(define-module SKRIBE-SOURCE-MODULE + (export source-read-lines source-read-definition source-fontify) + + +;; Temporary solution +(define (language-extractor lang) + (slot-ref lang 'extractor)) + +(define (language-fontifier lang) + (slot-ref lang 'fontifier)) + + +;*---------------------------------------------------------------------*/ +;* source-read-lines ... */ +;*---------------------------------------------------------------------*/ +(define (source-read-lines file start stop tab) + (let ((p (find-path file (skribe-source-path)))) + (if (or (not (string? p)) (not (file-exists? p))) + (skribe-error 'source + (format "Can't find `~a' source file in path" file) + (skribe-source-path)) + (with-input-from-file p + (lambda () + (if (> *skribe-verbose* 0) + (format (current-error-port) " [source file: ~S]\n" p)) + (let ((startl (if (string? start) (string-length start) -1)) + (stopl (if (string? stop) (string-length stop) -1))) + (let loop ((l 1) + (armedp (not (or (integer? start) (string? start)))) + (s (read-line)) + (r '())) + (cond + ((or (eof-object? s) + (and (integer? stop) (> l stop)) + (and (string? stop) (substring=? stop s stopl))) + (apply string-append (reverse! r))) + (armedp + (loop (+ l 1) + #t + (read-line) + (cons* "\n" (untabify s tab) r))) + ((and (integer? start) (>= l start)) + (loop (+ l 1) + #t + (read-line) + (cons* "\n" (untabify s tab) r))) + ((and (string? start) (substring=? start s startl)) + (loop (+ l 1) #t (read-line) r)) + (else + (loop (+ l 1) #f (read-line) r)))))))))) + +;*---------------------------------------------------------------------*/ +;* untabify ... */ +;*---------------------------------------------------------------------*/ +(define (untabify obj tab) + (if (not tab) + obj + (let ((len (string-length obj)) + (tabl tab)) + (let loop ((i 0) + (col 1)) + (cond + ((= i len) + (let ((nlen (- col 1))) + (if (= len nlen) + obj + (let ((new (make-string col #\space))) + (let liip ((i 0) + (j 0) + (col 1)) + (cond + ((= i len) + new) + ((char=? (string-ref obj i) #\tab) + (let ((next-tab (* (/ (+ col tabl) + tabl) + tabl))) + (liip (+ i 1) + next-tab + next-tab))) + (else + (string-set! new j (string-ref obj i)) + (liip (+ i 1) (+ j 1) (+ col 1))))))))) + ((char=? (string-ref obj i) #\tab) + (loop (+ i 1) + (* (/ (+ col tabl) tabl) tabl))) + (else + (loop (+ i 1) (+ col 1)))))))) + +;*---------------------------------------------------------------------*/ +;* source-read-definition ... */ +;*---------------------------------------------------------------------*/ +(define (source-read-definition file definition tab lang) + (let ((p (find-path file (skribe-source-path)))) + (cond + ((not (language-extractor lang)) + (skribe-error 'source + "The specified language has not defined extractor" + (slot-ref lang 'name))) + ((or (not p) (not (file-exists? p))) + (skribe-error 'source + (format "Can't find `~a' program file in path" file) + (skribe-source-path))) + (else + (let ((ip (open-input-file p))) + (if (> *skribe-verbose* 0) + (format (current-error-port) " [source file: ~S]\n" p)) + (if (not (input-port? ip)) + (skribe-error 'source "Can't open file for input" p) + (unwind-protect + (let ((s ((language-extractor lang) ip definition tab))) + (if (not (string? s)) + (skribe-error 'source + "Can't find definition" + definition) + s)) + (close-input-port ip)))))))) + +;*---------------------------------------------------------------------*/ +;* source-fontify ... */ +;*---------------------------------------------------------------------*/ +(define (source-fontify o language) + (define (fontify f o) + (cond + ((string? o) (f o)) + ((pair? o) (map (lambda (s) (if (string? s) (f s) (fontify f s))) o)) + (else o))) + (let ((f (language-fontifier language))) + (if (procedure? f) + (fontify f o) + o))) + +;*---------------------------------------------------------------------*/ +;* split-string-newline ... */ +;*---------------------------------------------------------------------*/ +(define (split-string-newline str) + (let ((l (string-length str))) + (let loop ((i 0) + (j 0) + (r '())) + (cond + ((= i l) + (if (= i j) + (reverse! r) + (reverse! (cons (substring str j i) r)))) + ((char=? (string-ref str i) #\Newline) + (loop (+ i 1) + (+ i 1) + (if (= i j) + (cons 'eol r) + (cons* 'eol (substring str j i) r)))) + ((and (char=? (string-ref str i) #\cr) + (< (+ i 1) l) + (char=? (string-ref str (+ i 1)) #\Newline)) + (loop (+ i 2) + (+ i 2) + (if (= i j) + (cons 'eol r) + (cons* 'eol (substring str j i) r)))) + (else + (loop (+ i 1) j r)))))) + +) |