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Strange `file-name-sans-extension' behavior

From: Jens Schmidt
Subject: Strange `file-name-sans-extension' behavior
Date: 26 Jul 2002 11:15:05 +0000
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.1

This bug report will be sent to the Free Software Foundation,
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In GNU Emacs 21.1.1 (i386-msvc-nt4.0.1381)
 of 2001-10-22 on buffy

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

(file-name-sans-extension "sys/types.h")

-> "c:/home/jschmidt/sys/types"

I would have expected the result "sys/types".

What about the following version of `file-name-sans-extension':

(defun file-name-sans-extension (filename)
  "Return FILENAME sans final \"extension\".
The extension, in a file name, is the part that follows the last `.'."
  (let ((file (file-name-sans-versions (file-name-nondirectory filename)))
      (if (string-match "\\.[^.]*\\'" file)
          (if (setq directory (file-name-directory filename))
              (concat (file-name-as-directory directory)
                      (substring file 0 (match-beginning 0)))
            (substring file 0 (match-beginning 0)))



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