def __init__(self, filename, mode = 'r', bufsize = None,
autoUnwrap = False):
self.__stream = None
self.__needsVfsClose = False
self.__reader = None
self.__writer = None
self.closed = True
self.encoding = None
self.errors = None
self.__lastWrite = False
self.mode = mode
self.name = None
self.filename = None
self.newlines = None
self.softspace = False
readMode = False
writeMode = False
if isinstance(filename, pm.Istream) or isinstance(filename, pm.Ostream):
# If we were given a stream instead of a filename, assign
# it directly.
self.__stream = filename
readMode = isinstance(filename, pm.Istream)
writeMode = isinstance(filename, pm.Ostream)
elif isinstance(filename, pm.VirtualFile):
# We can also "open" a VirtualFile object for reading.
self.__stream = filename.openReadFile(autoUnwrap)
if not self.__stream:
raise IOError
self.__needsVfsClose = True
readMode = True
else:
# Otherwise, we must have been given a filename. Open it.
if isinstance(filename, types.StringTypes):
# If a raw string is given, assume it's an os-specific
# filename.
filename = pm.Filename.fromOsSpecific(filename)
else:
# If a Filename is given, make a writable copy anyway.
filename = pm.Filename(filename)
self.filename = filename
self.name = filename.toOsSpecific()
binary = False
if 'b' in mode:
# Strip 'b'. This means a binary file.
i = mode.index('b')
mode = mode[:i] + mode[i + 1:]
binary = True
if 'U' in mode:
# Strip 'U'. We don't use it; universal-newline support
# is built into Panda, and can't be changed at runtime.
i = mode.index('U')
mode = mode[:i] + mode[i + 1:]
binary = False
if mode == '':
mode = 'r'
# Per Python docs, we insist this is true.
assert mode[0] in 'rwa'
if binary:
filename.setBinary()
else:
filename.setText()
# Actually open the streams.
if mode == 'w':
self.__stream = pm.Pofstream()
if not filename.openWrite(self.__stream, True):
raise IOError
writeMode = True
elif mode == 'a':
self.__stream = pm.Pofstream()
if not filename.openAppend(self.__stream):
raise IOError
writeMode = True
elif mode == 'w+':
self.__stream = pm.Pfstream()
if not filename.openReadWrite(self.__stream, True):
raise IOError
readMode = True
writeMode = True
elif mode == 'a+':
self.__stream = pm.Pfstream()
if not filename.openReadAppend(self.__stream):
raise IOError
readMode = True
writeMode = True
elif mode == 'r+':
self.__stream = pm.Pfstream()
if not filename.exists():
raise IOError
if not filename.openReadWrite(self.__stream, False):
raise IOError
readMode = True
writeMode = True
elif mode == 'r':
# For strictly read mode (not write or read-write
# mode), we use Panda's VirtualFileSystem.
self.__stream = _vfs.openReadFile(filename, autoUnwrap)
if not self.__stream:
raise IOError
self.__needsVfsClose = True
readMode = True
if readMode:
self.__reader = pm.StreamReader(self.__stream, False)
if writeMode:
self.__writer = pm.StreamWriter(self.__stream, False)
