1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
module DBF
module Memo
class Foxpro < Base
FPT_HEADER_SIZE = 512
def build_memo(start_block) # :nodoc:
@data.seek offset(start_block)
memo_type, memo_size, memo_string = @data.read(block_size).unpack('NNa*')
return nil unless memo_type == 1 && memo_size > 0
if memo_size > block_content_size
memo_string << @data.read(content_size(memo_size))
else
memo_string = memo_string[0, memo_size]
end
memo_string
rescue StandardError
nil
end
private
def block_size # :nodoc:
@block_size ||= begin
@data.rewind
@data.read(FPT_HEADER_SIZE).unpack1('x6n') || 0
end
end
end
end
end
|
