Re: glib / String handling difficult

["David Necas (Yeti)" <yeti physics muni cz>]

On Mon, Jan 09, 2006 at 06:52:45AM +0200, Juhana Sadeharju wrote:
> 
> Hello. I have always found string handling quite difficult in C.
> It also looks like sed, awk, perl etc. cannot handle all of my
> simple needs.

Really cannot? What about...

> Now more difficult example. I need to parse "12 pages" in
> a middle of a html page. For example, sscanf("%i pages",) yields
> nothing even there is only one "<number> pages" in the file.

This looks like you want to *search* for "12 pages".

> Now I first find the "pages" and move back over the "12" but
> this is not simple.

  m = re.search('\b(\d+)\s+pages\b', text)
  if m:
      nofpages = int(m.group(1))
  else:
      ...

This is in python, but you can use perl, ruby or awk equally
well.  In C, you can use libpcre (for example).

Note sscanf("%i pages") would succeed if it was fed with the
string "12 pages", but neither sscanf nor GScanner is a tool
for *searching* in text.

Yeti


--
That's enough.