Oops. Forgot to add module ptempfile.py to svn

libprs500/ptempfile.py

@@ -0,0 +1,59 @@
+##    Copyright (C) 2006 Kovid Goyal kovid@kovidgoyal.net
+##    This program is free software; you can redistribute it and/or modify
+##    it under the terms of the GNU General Public License as published by
+##    the Free Software Foundation; either version 2 of the License, or
+##    (at your option) any later version.
+##
+##    This program is distributed in the hope that it will be useful,
+##    but WITHOUT ANY WARRANTY; without even the implied warranty of
+##    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+##    GNU General Public License for more details.
+##
+##    You should have received a copy of the GNU General Public License along
+##    with this program; if not, write to the Free Software Foundation, Inc.,
+##    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.Warning
+""" 
+Provides platform independent temporary files that persist even after 
+being closed.
+"""
+import tempfile
+import os
+
+from libprs500 import __version__
+
+class _TemporaryFileWrapper(object):
+    """
+    Temporary file wrapper
+
+    This class provides a wrapper around files opened for
+    temporary use.  In particular, it seeks to automatically
+    remove the file when the object is deleted.
+    """
+
+    def __init__(self, _file, name):
+        self.file = _file
+        self.name = name        
+
+    def __getattr__(self, name):
+        _file = self.__dict__['file']
+        a = getattr(_file, name)
+        if type(a) != type(0):
+            setattr(self, name, a)
+        return a
+        
+    def __del__(self):
+        if os.access(self.name, os.F_OK): 
+            os.unlink(self.name)
+    
+    
+def PersistentTemporaryFile(suffix="", prefix=""):
+    """ 
+    Return a temporary file that is available even after being closed on
+    all platforms. It is automatically deleted when this object is deleted.
+    Uses tempfile.mkstemp to create the file. The file is opened in mode 'wb'.
+    """
+    if prefix == None: 
+        prefix = ""
+    fd, name = tempfile.mkstemp(suffix, "libprs500_"+ __version__+"_" + prefix)
+    _file = os.fdopen(fd, "wb")
+    return _TemporaryFileWrapper(_file, name)