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From: "jansb000" <jansb000 AT planet DOT nl>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: how to determine if a file is text/binary
Date: Wed, 1 May 2002 21:45:36 +0200
Organization: Planet Internet
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To: djgpp AT delorie DOT com
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If all data that you read is between Hex 20 and Hex 7F (with exception for
Hex 0D or Hex 0D 0A) then there is a good chance the file is ASCII.

To be more sure: Test if you can detect sentences in the form:
ASCII_FILE = ASCII_SEQUENCE + TERMINATOR
ASCII_SEQUENCE = ASCII2_SEQUENCE + LINE_BREAK
ASCII2_SEQUENCE = ASCII* [+ SPACE* + ASCII*]*
ASCII = 'A', 'B', 'C', etc ...
SPACE = ' ', '\t', etc ...

"xeon" <xeon AT dacreations DOT cjb DOT net> schreef in bericht
news:c21a43ff DOT 0204302309 DOT 7c13ed96 AT posting DOT google DOT com...
> Eli Zaretskii <eliz AT is DOT elta DOT co DOT il> wrote in message
news:<Pine DOT SUN DOT 3 DOT 91 DOT 1020430081409 DOT 3296J-100000 AT is>...
> > The usual technique is to read a portion of a file, say, 16KB, and see
if
> > it contains null characters (`\0').
> Is there any other way? Test reading Kb's of data may not be an option
> in this particular project.
>
> TIA