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CRC32 returns negative on big files
Message
From
01/08/2011 03:44:08
 
 
General information
Forum:
ASP.NET
Category:
Coding, syntax and commands
Environment versions
Environment:
VB 9.0
OS:
Windows 7
Network:
Windows 2003 Server
Database:
MS SQL Server
Application:
Web
Miscellaneous
Thread ID:
01519635
Message ID:
01519778
Views:
13
>>>>>>(1) The short way is to cast the return result to UInteger, and change the return type of GetCrc32() to UInteger
>>>>>
>>>>>This line cannot be changed to UInteger:
>>>>>
>>>>>
>>>>>        Dim lnCRC32Result As Integer = &HFFFFFFFF
>>>>>
>>>>>
>>>>>It would give an error: "Constant expression not representable in type 'UInteger"
>>>>
>>>>Yes, it seems vb interpretes those as signed
>>>>
>>>>http://msdn.microsoft.com/en-us/library/s9cz43ek.aspx
>>>>
>>>>Append the type to the constant. U and I
>>>>
>>>>    Dim lnCRC32Result As UInteger = &HFFFFFFFFUI
>>>>
>>>
>>>There you go! Thx, didn't know that syntax existed :-{
>>
>>Well, you know more vb than I do -
>I know VB just well enough to work with it where it maps pretty straightforwardly to C# and that's about it.
>>I just googled my way through
>And I was too lazy :-}


I just had the impression you were not in favour of unsigned types ;)
Gregory
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