Re: [Sbcl-devel] [OT] Re: new line character in the string when using read-line with stream with \r\n line endings

[Craig L. <cra...@gm...>]

On Tue, 2016-01-26 at 09:16 -0600, Robert P. Goldman wrote:
> On 1/26/16 Jan 26 -8:35 AM, Michael Hannemann wrote:
> > Manuel Giraud wrote:
> > > Stas Boukarev <sta...@gm...> writes:
> > > 
> > > > > > Using READ for reading stuff that is not lisp source code
> > > > > > is a really
> > > > > > bad idea. Never do it.
> > > > > Why?
> > > > Because it's slow and unsafe.
> > > 
> > > I'm curious. I generally use read-from-string out of lines to
> > > parse
> > > float for instance. How should I do then without using the CL
> > > parser?
> > I figure it depends on your needs & infrastructure?  To help with
> > the
> > unsafe part, you can wrap it in (let ((*read-eval* nil)) ...).
> 
> In addition to the safety issue, READ can be very slow.  If you think
> about it, it can do almost arbitrary computation.
> 
> If you know the type of the data you are reading, you will find that
> parsing it specially will be a huge win.

Or, if it suits your purpose, you can build a custom readtable that
parses things exactly the way you want and use that with READ.  I use
this method to parse ISO 10303-11 schema files and ISO 10303-21 data
files.  It works quite well for me.

Craig