Re: Using "pure" (?) Ada, how to determine whether a file is a "text" file, not a binary?

[Kenneth Wolcott <kennethwolcott@gmail.com>]

On Saturday, July 1, 2023 at 6:08:21 PM UTC-7, Chris Townley wrote:
> On 01/07/2023 22:50, Kenneth Wolcott wrote: 
> > On Saturday, July 1, 2023 at 2:39:06 PM UTC-7, Keith Thompson wrote: 
> >> Kenneth Wolcott writes: 
> >>> On Saturday, July 1, 2023 at 1:39:30 PM UTC-7, Jeffrey R.Carter wrote: 
> >>>> On 2023-07-01 19:15, Kenneth Wolcott wrote: 
> >> [...] 
> >>>> For example, if a text file is one in which all the characters, except line 
> >>>> terminators, are graphic characters, then it should be clear how to determine 
> >>>> whether a file meets that definition of a text file. 
> >>> 
> >>> I think that is the definition that I'm going to pursue as the 
> >>> simplest and effective definition. 
> >> Think about how you want to handle tab characters (non-graphic but 
> >> common in some text) and carriage return characters (non-graphic but 
> >> part of a line terminator for Windows-style text files). 
> >> 
> >> Also think about the various ways of representing text: ASCII, Latin-1, 
> >> UTF-8, UTF-16, etc. 
> > 
> > Thanks, Keith! 
> > 
> > It looks like just need to more carefully examine the existing Ada I/O packages and experiment with the possibilities... 
> > 
> > Ken
> Maybe worth looking at the unix file utility, docs and source are available 

Thank you, Chris.

I have just downloaded the source code for the UNIX/Linus file command and am browsing around...

Thanks,
Ken