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fix regexp-match-positions* with input ports

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svn: r9604
This commit is contained in:
Eli Barzilay 2008-05-02 21:04:24 +00:00
parent 8b6f716d53
commit 0e299c5bd2
1 changed files with 15 additions and 7 deletions
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22
collects/scheme/private/string.ss
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@ -199,13 +199,21 @@
;; re-match if we get a zero-length match at the
;; beginning, and we can continue
[m (if (and (= mstart mend start)
(cond [end (< start end)]
[len (< start len)]
[(input-port? string)
(not (eof-object?
(peek-byte string)))]
[else (error "internal error (str)")]))
(match rx string (add1 start) end)
(cond
[end (< start end)]
[len (< start len)]
[(input-port? string)
(not (eof-object? (peek-byte string)))]
[else (error "internal error (str)")]))
(if (or peek? (not (input-port? string)))
(match rx string (add1 start) end)
;; rematching on a port requires adding `start'
;; offsets
(let ([m (match rx string 1 end)])
(if (and m (positive? start))
(list (cons (+ start (caar m))
(+ start (cdar m))))
m)))
m)])
;; fail if rematch failed
(if (not m)