Extending R.E. Syntax (was: Re: Eliminating binary from a text file)

[Alexander Sukholitko]

Hi,
Possibly using "strings file_name >new_file_name" command could resolve
this problem.
Thank you.
Alex

On Mon, Jul 20, 2015 at 9:46 PM, Omer Zak <w1 at zak.co.il> wrote:

> Instead of creating a separate bgrep, it would have been better to be
> able to extend the syntax of regular expressions (in egrep, Perl and
> other platforms) to allow specification of binary strings having
> arbitrary length by means of an hex string.
>
> This would come instead of making it very cumbersome to specify strings
> longer than one character (\xnn or \unnnn or equivalent - see also:
> http://www.regular-expressions.info/unicode.html).
>
> And if we are at it, it would have been nice to add to all R.E. engines
> hooks to allow private extensions of R.E. syntax, in order to allow
> people to concisely express special parsing requirements.
>
> --- Omer
>
>
> On Mon, 2015-07-20 at 21:24 +0300, Shachar Shemesh wrote:
> > On 20/07/15 11:56, Orna Agmon Ben-Yehuda wrote:
> >
> > > Hello everyone,
> > >
> > >
> > > I often have damaged text files (due to a lovely storage system).
> > > The files are of different formats, although I can usually assume
> > > they contain spaces. The files are structured as lines.
> > >
> > >
> > > Every once in a while, the lovely destruction (ahm....storage)
> > > system inserts binary garbage to the file. I wish to fix the files
> > > by removing the cancer without leaving any leftovers. That is, I
> > > want to lose partial lines.
> > >
> > >
> > > I tried using grep with all sorts of keys, but it did not do the
> > > trick.
> > > strings catches too little - it leaves partial lines.
> > > Is there an elegant  way to  do the trick line-wise?
> > >
> > >
> > > Thanks
> > > Orna
> > >
> > http://debugmo.de/2009/04/bgrep-a-binary-grep/
> --
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