Re: How to find only one invalid char in src buffer with MultiByte

"Alex Blekhman" <>
Sat, 7 Jun 2008 11:46:42 +0300
"Bill" wrote:

   MB_PRECOMPOSED gives ZERO for all. What are precomposed

Read the documentation for `MultiByteToWideChar'. There is an
explanation of what is precomposed and composite character.

  I am working on client/server based application and client
side. We are providing UNICODE support for our application as
well as backward compatibility also. Here, I choosed
WideCharToMultiByte and MultiByteToWideChar api's to process
data in UTF-8 or ACP. Is it correct?

Apparently, it is not correct, since you get errors.

   Requirement: my application recieves data (void*) from server
through sockets. I need to identify whether this data was
encoded by UTF-8 or ACP. I am sure, server side data was encoded
by either UTF-8 or ACP.

You are confused here. ACP is not a codepage. CP_ACP is a special
flag for `MultiByteToWideChar' that tells the finction to use
current codepage, whatever it is. If you want to use
`MultiByteToWideChar' successfully, then you must know source
codepage beforehand.

You can try to call `IsTextUnicode' with input data to determine
whether is it Unicode at all. However, this method is not fully
reliable. You must establish connection encoding with the server
before you receive any data.


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