Re: glib / String handling difficult
- From: Jose Hevia <jose francisco hevia gmail com>
- To: gtk-list gnome org
- Subject: Re: glib / String handling difficult
- Date: Mon, 9 Jan 2006 12:45:17 +0100
2006/1/9, Juhana Sadeharju <kouhia nic funet fi>:
> 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. Glib could be improved.
I thought the same.
> I need often an extractor which finds something from
> an arbitrary data. I have routines file2buffer(), which
> loads a file to buffer, and bufferfind(), which searches
> for a string in the buffer. The file could be a html page
> downloaded with wget or a mixed binary and ascii file.
> 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.
> Now I first find the "pages" and move back over the "12" but
> this is not simple.
> The lexicar scanner in glib is nice, but a similar parser would
> be needed as well. A parser to which the rules are feeded at
> runtime -- not compiled as with flex/bison.
> p = parser_new();
> parser_add_rule(p,"rule : token otherrule", callback);
> parser_add_rule(p,"rule : alttoken anotherrule", altcallback);
> parser_prepare(p); // converts rules to efficient execution data structure
I thing this is a little offtopic,but...
I don't know anything about parsers theory, but I have created
something like that. I have a program that reads all words and symbols
from a file, and convert it to integers. Something like "this is a
phrase" is a number too, so I can manage a word, symbol or phrase with
a single int.I change the language rules(what is a symbol, or phrase)
at runtime. But it will take a long,long time to be stable, because of
being so low level.
> Then in my application, I could mix the bufferfind() with several
> miniparsers. And I could define miniparsers as needed in app's
> dialog without compiling anything.
I want to do a xorg.conf reader/writer, but I'm using this thing too
to understand structures from c header files for another program.
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