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Fix reading Memos written by Lotus Approach #74

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Fix reading Memos written by Lotus Approach #74

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18 changes: 12 additions & 6 deletions dbfread/memo.py
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Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,7 @@
DB4MemoHeader = StructParser(
'DBase4MemoHeader',
'<LL',
['reserved', # Always 0xff 0xff 0x08 0x08.
['reserved',
'length'])


Expand Down Expand Up @@ -160,11 +160,17 @@ def __getitem__(self, index):

self._seek(index * block_size)
memo_header = DB4MemoHeader.read(self.file)
data = self._read(memo_header.length)
# Todo: fields are terminated in different ways.
# \x1a is one of them
# \x1f seems to be another (dbase_8b.dbt)
return data.split(b'\x1f', 1)[0]

# 0xff 0xff 0x08 0x00
if memo_header.reserved == 0x0008FFFF:
return self._read(memo_header.length - DB4MemoHeader.size)
else:
# memo_header.reserved is usually 0xff 0xff 0x08 0x08.
data = self._read(memo_header.length)
# Todo: fields are terminated in different ways.
# \x1a is one of them
# \x1f seems to be another (dbase_8b.dbt)
return data.split(b'\x1f', 1)[0]


def find_memofile(dbf_filename):
Expand Down