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- ; This is a programming example.
-
- ; This program takes two ASCII files as arguments, and copies the first
- ; file into the second. If the first file does not exist, an error message
- ; is displayed; however, if the second file does not exist, it is created.
- ; Note that if the second file exists, its data will be overwritten.
- ; Usage: (fcopy "infile.ext" "outfile.ext")
-
- (defun fcopy (in out / ifp ofp l)
- (cond ((null (setq ifp (open in "r"))) ; try to open in for reading
- (princ "Can't open ") ; if nil print error message
- (princ in)
- (princ " for reading."))
- (if ifp (progn
- (setq ofp (open out "w")) ; else open out for writing
- (while (setq l (read-line ifp)) ; read each line from in
- (write-line l ofp) ; and write it to out
- )
- (close ofp) ; close both files
- (close ifp))
- )
- )
- (princ)
- )
-