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Fix bug in reading memo files larger than 16MiB

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This commit is contained in:
Jeffrey S. Smith 2010-09-24 22:56:33 -05:00
parent 4f11181bfa
commit 6504397662
1 changed files with 7 additions and 6 deletions
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13
openlp/plugins/songs/lib/ewimport.py
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@ -249,19 +249,20 @@ class EasyWorshipSongImport(SongImport):
return (field ^ 0x80 == 1)
elif field_desc.type == 0x0c or field_desc.type == 0x0d:
# Memo or Blob
sub_block, block_start, blob_size = \
struct.unpack_from('<bhxi', field, len(field)-10)
self.memo_file.seek(block_start * 256)
block_start, blob_size = \
struct.unpack_from('<II', field, len(field)-10)
sub_block = block_start & 0xff;
block_start &= ~0xff
self.memo_file.seek(block_start)
memo_block_type, = struct.unpack('b', self.memo_file.read(1))
if memo_block_type == 2:
self.memo_file.seek(8, os.SEEK_CUR)
elif memo_block_type == 3:
if sub_block < 0 or sub_block > 63:
if sub_block > 63:
return u'';
self.memo_file.seek(11 + (5 * sub_block), os.SEEK_CUR)
sub_block_start, = struct.unpack('B', self.memo_file.read(1))
self.memo_file.seek((block_start * 256) +
(sub_block_start * 16))
self.memo_file.seek(block_start + (sub_block_start * 16))
else:
return u'';
return self.memo_file.read(blob_size)