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|
;*=====================================================================*/
;* serrano/prgm/project/skribe/src/bigloo/source.scm */
;* ------------------------------------------------------------- */
;* Author : Manuel Serrano */
;* Creation : Fri Aug 29 07:27:25 2003 */
;* Last change : Tue Nov 2 14:25:50 2004 (serrano) */
;* Copyright : 2003-04 Manuel Serrano */
;* ------------------------------------------------------------- */
;* The Bigloo handling of Skribe programs. */
;*=====================================================================*/
;*---------------------------------------------------------------------*/
;* The module */
;*---------------------------------------------------------------------*/
(module skribe_source
(include "new.sch")
(import skribe_types
skribe_lib
skribe_resolve
skribe_eval
skribe_api
skribe_param)
(export (source-read-chars::bstring ::bstring ::int ::int ::obj)
(source-read-lines::bstring ::bstring ::obj ::obj ::obj)
(source-read-definition::bstring ::bstring ::obj ::obj ::obj)
(source-fontify ::obj ::obj)
(split-string-newline::pair-nil ::bstring)))
;*---------------------------------------------------------------------*/
;* source-read-lines ... */
;*---------------------------------------------------------------------*/
(define (source-read-chars file start stop tab)
(define (readl p)
(read/rp (regular-grammar ()
((: (* (out #\Newline)) (? #\Newline))
(the-string))
(else
(the-failure)))
p))
(let ((p (find-file/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 (>fx *skribe-verbose* 0)
(fprint (current-error-port) " [source file: " p "]"))
(let loop ((c -1)
(s (readl (current-input-port)))
(r '()))
(let ((p (input-port-position (current-input-port))))
(cond
((eof-object? s)
(apply string-append (reverse! r)))
((>=fx p stop)
(let* ((len (-fx (-fx stop start) c))
(line (untabify (substring s 0 len) tab)))
(apply string-append
(reverse! (cons line r)))))
((>=fx c 0)
(loop (+fx (string-length s) c)
(readl (current-input-port))
(cons (untabify s tab) r)))
((>=fx p start)
(let* ((len (string-length s))
(nc (-fx p start)))
(if (>fx p stop)
(untabify
(substring s
(-fx len (-fx p start))
(-fx (-fx p stop) 1))
tab)
(loop nc
(readl (current-input-port))
(list
(untabify
(substring s
(-fx len (-fx p start))
len)
tab))))))
(else
(loop c (readl (current-input-port)) r))))))))))
;*---------------------------------------------------------------------*/
;* source-read-lines ... */
;*---------------------------------------------------------------------*/
(define (source-read-lines file start stop tab)
(let ((p (find-file/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 (>fx *skribe-verbose* 0)
(fprint (current-error-port) " [source file: " 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 (+fx l 1)
#t
(read-line)
(cons* "\n" (untabify s tab) r)))
((and (integer? start) (>= l start))
(loop (+fx l 1)
#t
(read-line)
(cons* "\n" (untabify s tab) r)))
((and (string? start) (substring=? start s startl))
(loop (+fx l 1) #t (read-line) r))
(else
(loop (+fx 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
((=fx i len)
(let ((nlen (-fx col 1)))
(if (=fx len nlen)
obj
(let ((new (make-string col #\space)))
(let liip ((i 0)
(j 0)
(col 1))
(cond
((=fx i len)
new)
((char=? (string-ref obj i) #\tab)
(let ((next-tab (*fx (/fx (+fx col tabl)
tabl)
tabl)))
(liip (+fx i 1)
next-tab
next-tab)))
(else
(string-set! new j (string-ref obj i))
(liip (+fx i 1) (+fx j 1) (+fx col 1)))))))))
((char=? (string-ref obj i) #\tab)
(loop (+fx i 1)
(*fx (/fx (+fx col tabl) tabl) tabl)))
(else
(loop (+fx i 1) (+fx col 1))))))))
;*---------------------------------------------------------------------*/
;* source-read-definition ... */
;*---------------------------------------------------------------------*/
(define (source-read-definition file definition tab lang)
(let ((p (find-file/path file (skribe-source-path))))
(cond
((not (%language-extractor lang))
(skribe-error 'source
"The specified language has not defined extractor"
lang))
((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 (>fx *skribe-verbose* 0)
(fprint (current-error-port) " [source file: " 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
((=fx i l)
(if (=fx i j)
(reverse! r)
(reverse! (cons (substring str j i) r))))
((char=? (string-ref str i) #\Newline)
(loop (+fx i 1)
(+fx i 1)
(if (=fx i j)
(cons 'eol r)
(cons* 'eol (substring str j i) r))))
((and (char=? (string-ref str i) #a013)
(<fx (+fx i 1) l)
(char=? (string-ref str (+fx i 1)) #\Newline))
(loop (+fx i 2)
(+fx i 2)
(if (=fx i j)
(cons 'eol r)
(cons* 'eol (substring str j i) r))))
(else
(loop (+fx i 1) j r))))))
|
