README
author Adrian Buehlmann <adrian@cadifra.com>
Wed, 18 May 2011 09:12:27 +0200
changeset 14413 5ef18e28df19
parent 12857 a9f91c844a3b
child 16217 df5ecb813426
permissions -rw-r--r--
pure: provide more correct implementation of posixfile for Windows requires ctypes Why is posixfile a class? Because the implementation needs to use the Python library call os.fdopen [1], which sets the 'name' attribute on the Python file object it creates to the mostly meaningless string '<fdopen>', since file descriptors don't have a name. But users of posixfile depend on the name attribute [2] being set to a proper value, like Python's built-in 'open' function sets it on file objects. Python file's name attribute is read-only, so we can't just assign to it after the file object has alrady been created. To solve this problem, we save the name of the file on a wrapper object, and delegate the file function calls to the wrapped (private) file object using __getattr__. [1] http://docs.python.org/library/os.html#os.fdopen [2] http://docs.python.org/library/stdtypes.html#file.name

Mercurial
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 $ make            # see install targets
 $ make install    # do a system-wide install
 $ hg debuginstall # sanity-check setup
 $ hg              # see help

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