Hello all,
I wonder if somebody can make sense of this rather baffling problem I've
encountered. I'm taking an exported registry file, and
stripping out the control codes and empty bytes. However, som of the resulting
text that this leaves behind is strangely truncated,
and I'm blowed if I know why.
The export is started using, for example
Shell "regedit /E " & "C:\local " & "HKEY_LOCAL_MACHINE"
This exports the LOCAL_MACHINE hive to the file c:\local
The output has extra bytes, presumably used for some arcane windows
purpose, e.g.:
"fig1.jpg"
I then open this file using the system object, strip out any characters of
Ascii value < 32, so that what remains is simple text.
For i = 1 To Len(line)
If Asc(Mid$(line, i, 1)) > 31 Then
cleanline = Cleanline & Mid$(line, i, 1)
End If
Next i
BY and large this works fine - I end up with simple text versions of the hives
that I can then use later in the application. However,
oddly, every now and then I find a line that part of the start missing,
seemingly at random (well there's no pattern I can spot).
To put it in context, I process some 500,000 lines and around 7000 are broken.
Here's the kicker though - these
lines appear to have nothing in common, there's no obvious pattern to what's
happening, the error lines are unevenly and seemingly
randomly dispersed through the files, there are no control codes or anything
odd in the registry export files that appear to trigger
the error (and the stripper code is straightforward anyway). In short, I can't
see any rhyme or reason for the error. The source
file is consistent, the stripping algorythm is consistent, the output has
random errors in it.
A sample from the cleaned file:
[HKEY_CURRENT_USER\Control Panel\PowerCfg\PowerPolicies\3]
"Name"="Always On"
have network wakeup hardware."
"Policies"=hex:01,00,00,00,02,00,00,00,01,00,00,00,00,00,00,00,02,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,32,32,00,00,04,00,00,00,04,00,\
00,00,00,00,00,00,00,00,00,00,b0,04,00,00,84,03,00,00,00,00,00,00,08,07,00,\
00,00,01,64,64,64,64,00,00
See how the lines are all correct apart from the line "have network wakeup
hardware."". This should read:
"Description"="This scheme keeps the computer running so that it can be
accessed from the network. Use this scheme if you do not
have network wakeup hardware."
There will be odd lines here and there dispersed through the file that are
truncated in this way, but I can't see any cause for it.
If anybody has any idea where to start looking for a cause I'd be extremely
greatful.
Cheers
Colin
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