[Qt-interest] How to check between "Text" and "Non-Text" File

[Bruce Cran]

On 20/04/10 09:30, Aaron Lewis wrote:
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> On 04/20/2010 04:13 PM, Jeroen De Wachter wrote:
>> Hey yogesh,
>>
>> I don't know if you ever worked with the file command? Its sole purpose
>> is to classify files.
>> Maybe you can get some ideas from the source code.
>
> File command just reads the header of a file , and sometimes it can be
> forged , but it's an common way to detect file types , like RAR:
>
> Header Signature is `52 61 72 21' in hex , `Rar!' in ascii.
>
> Generally speaking , there's no good way to check if the file is totally
> plain text , but a single character.
>
> Just as Frederic suggested , try bool QChar::isPrint()

It's fairly common for text files to contain occasional non-ASCII 
characters. For example a file like 
http://svn.freebsd.org/viewvc/base/head/sys/compat/linprocfs/linprocfs.c?revision=206597&view=markup 
often trips up "less" into thinking it's a binary file due to the 
inclusion of 'ø'.

-- 
Bruce Cran

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