def _addField(self, *defs):
"""Internal variant of the `addField` method.
This method doesn't set `self.changed` field to True.
Return value is a length of the appended records.
Note: this method doesn't modify ``recordLength`` and
``headerLength`` fields. Use `addField` instead of this
method if you don't exactly know what you're doing.
"""
# insure we have dbf.DbfFieldDef instances first (instantiation
# from the tuple could raise an error, in such a case I don't
# wanna add any of the definitions -- all will be ignored)
_defs = []
_recordLength = 0
for _def in defs:
if isinstance(_def, fields.DbfFieldDef):
_obj = _def
else:
(_name, _type, _len, _dec) = (tuple(_def) + (None,) * 4)[:4]
_cls = fields.lookupFor(_type)
_obj = _cls(_name, _len, _dec,
ignoreErrors=self._ignore_errors)
_recordLength += _obj.length
_defs.append(_obj)
# and now extend field definitions and
# update record length
self.fields += _defs
return _recordLength
def fromStream(cls, stream):
"""Return header object from the stream."""
stream.seek(0)
_data = stream.read(32)
(_cnt, _hdrLen, _recLen) = struct.unpack("<I2H", _data[4:12])
#reserved = _data[12:32]
_year = ord(_data[1])
if _year < 80:
# dBase II started at 1980. It is quite unlikely
# that actual last update date is before that year.
_year += 2000
else:
_year += 1900
## create header object
_obj = cls(None, _hdrLen, _recLen, _cnt, ord(_data[0]),
(_year, ord(_data[2]), ord(_data[3])))
## append field definitions
# position 0 is for the deletion flag
_pos = 1
_data = stream.read(1)
while _data[0] != "\x0D":
_data += stream.read(31)
_fld = fields.lookupFor(_data[11]).fromString(_data, _pos)
_obj._addField(_fld)
_pos = _fld.end
_data = stream.read(1)
return _obj
def fromStream(cls, stream, encoding=None, enableFieldNameDups=False):
"""Return header object from the stream."""
stream.seek(0)
_data = stream.read(32)
(_cnt, _hdrLen, _recLen) = struct.unpack("<I2H", _data[4:12])
#reserved = _data[12:32]
## create header object
_obj = cls(None,
_hdrLen,
_recLen,
_cnt,
ord(_data[0]),
(1900 + ord(_data[1]), ord(_data[2]), ord(_data[3])),
encoding=encoding,
enableFieldNameDups=enableFieldNameDups)
## append field definitions
# position 0 is for the deletion flag
_pos = 1
_data = stream.read(1)
while _data[0] != "\x0D":
_data += stream.read(31)
_fld = fields.lookupFor(_data[11]).fromString(_data,
_pos,
encoding=encoding)
_obj._addField(_fld)
_pos = _fld.end
_data = stream.read(1)
return _obj
def fromStream(cls, stream):
"""Return header object from the stream."""
stream.seek(0)
_data = stream.read(32)
(_cnt, _hdrLen, _recLen) = struct.unpack("<I2H", _data[4:12])
# reserved = _data[12:32]
## create header object
_obj = cls(None, _hdrLen, _recLen, _cnt, ord(_data[0]), (1900 + ord(_data[1]), ord(_data[2]), ord(_data[3])))
## append field definitions
# position 0 is for the deletion flag
_pos = 1
_data = stream.read(1)
while _data[0] != "\x0D":
_data += stream.read(31)
_fld = fields.lookupFor(_data[11]).fromString(_data, _pos)
_obj._addField(_fld)
_pos = _fld.end
_data = stream.read(1)
return _obj
def _addField(self, *defs):
"""Internal variant of the `addField` method.
This method doesn't set `self.changed` field to True.
Return value is a length of the appended records.
Note: this method doesn't modify ``recordLength`` and
``headerLength`` fields. Use `addField` instead of this
method if you don't exactly know what you're doing.
"""
_recordLength = 0
for _def in defs:
if isinstance(_def, fields.DbfFieldDef):
_obj = _def
else:
(_name, _type, _len, _dec,
_encoding) = (tuple(_def) + (None, ) * 5)[:5]
_cls = fields.lookupFor(_type)
_obj = _cls(_name, _len, _dec, _encoding)
_recordLength += _obj.length
if _obj.encoding is None:
_obj.encoding = self.encoding
if isinstance(_obj, fields.DbfMemoFieldDef):
self.signature |= 0x80
if _obj.name in self.mapNameToIndex:
if self.enableFieldNameDups:
index = self.mapNameToIndex[_obj.name]
if isinstance(index, int):
index = [index]
index.append(len(self.fields))
else:
raise Exception, 'DBF field name "%s" duplicated' % _obj.name
else:
index = len(self.fields)
self.mapNameToIndex[_obj.name] = index
self.fields.append(_obj)
return _recordLength
