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;;;;
;; ct.scm: provides rk-lib equivalent functions using composing table
;;
;; following functions are used by rk.scm if table is used as a rule
;; ct-lib-expect-seq
;; ct-lib-expect-key-for-seq?
;; ct-lib-find-seq
;; ct-lib-find-partial-seq
;;
;; NB: composing table needs to be sorted
(require-dynlib "look")
(define ct-lib-find-seq
(lambda (seq table)
(let ((looked (look-lib-look
#f
#f
1
(string-append (sys-pkgdatadir) "/tables/" table)
(apply string-append seq))))
(if (and
looked
(not (null? looked))
(= (string-contains (car looked) " " 0) 0))
(list (list seq) (read-from-string (car looked)))
#f))))
;; return a rule of partial match
(define ct-lib-find-partial-seq
(lambda (seq table)
;; search 2 entries matching (including partial match) with look
(let ((looked (look-lib-look
#f
#f
2
(string-append (sys-pkgdatadir) "/tables/" table)
(apply string-append seq))))
(if (and
looked
(not (null? looked)))
(let ((first (car looked))
(second (if (null? (cdr looked))
'()
(car (cdr looked)))))
(cond
;; second one is partial
((and
(not (null? second))
(string=? (substring first 0 1) " "))
(let ((partial
(reverse
(string-to-list (car (string-split second " ")))))
(cands
(apply string-append (cdr (string-split second " ")))))
(list (list (append seq partial)) (read-from-string cands))))
;; first one is partial
((not (string=? (substring first 0 1) " "))
(let ((partial
(reverse
(string-to-list (car (string-split first " ")))))
(cands
(apply string-append (cdr (string-split first " ")))))
(list (list (append seq partial)) (read-from-string cands))))
(else
#f)))
#f))))
(define ct-lib-expect-key-for-seq?
(lambda (seq table str)
(let* ((lst (ct-find-cands-incl-minimal-partial seq table))
(residuals
(filter-map (lambda (x) (if (string=? (cdr x) "")
#f
(substring (cdr x) 0 1))) lst)))
(if (member str residuals)
#t
#f))))
(define ct-lib-expect-seq
(lambda (seq table keystr)
(let* ((lst (ct-find-cands-incl-minimal-partial seq table))
(residuals
(filter-map (lambda (x) (if (string=? (cdr x) "")
#f
(substring (cdr x) 0 1))) lst)))
residuals)))
(define ct-find-cands-incl-minimal-partial
(lambda (seq table)
(let ((looked (look-lib-look
#f
#f
5000 ;; is it sufficient enough?
(string-append (sys-pkgdatadir) "/tables/" table)
(apply string-append seq))))
(if (and
looked
(not (null? looked)))
(let* ((min-partial-pos
(lambda (lst)
(let ((maxlen (apply max (map string-length lst))))
(let loop ((n 1))
(if (= maxlen n)
0 ;; not found
(if (not
(null?
(filter
(lambda (x)
(string=? (substring x n (+ n 1)) " "))
lst)))
n
(loop (+ n 1))))))))
(pos (min-partial-pos looked))
(match
(filter
(lambda (x)
(or (string=? (substring x pos (+ pos 1)) " ")
(string=? (substring x 0 1) " ")))
looked))
(str (map (lambda (x) (string-split x " ")) match))
(residual (map (lambda (x) (car x)) str))
(cands
(map
(lambda (x)
(read-from-string (apply string-append (cdr x)))) str))
(lst (map (lambda (x y) (cons x y)) cands residual)))
lst)
'()))))
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