[Courses] How to get line-information from buffer..

[Conor Daly]

This might be better sent to the programming list...

On Mon, Sep 30, 2002 at 03:26:53AM -0700 or so it is rumoured hereabouts, 
Abel Pires da Silva thought:
> Thank you for your help..
> I think I have to be more specific...
> I'm reading a socket descriptor and open a file
> containt with some addresses, and (here is the most
> important thing...) make comparation is there any
> "line" match between the two.
 
Just clear up something here:  
A) Do you wish to match an _entire_ line?
B) Do you wish to match _part_ of a line?
C) Do you wish to match _any_ line in the buffer with _any_ line in the file?
D) Do you wish to match _part_ of _any_ line in the buffer with _part_ of
   _any_ line in the file?

I think you mean D above...

> Here is the situation:
> I have buffer containt some thing like this:
> 
> GET / HTTP/1.0
> Connection: Keep-Alive
> User-Agent: Mozilla/4.75 [en] (X11; U; Linux
> 2.2.17-21mdk i686)
> Host: localhost:8000
> Accept: image/gif, image/x-xbitmap, image/jpeg,
> image/pjpeg, image/png, */*
> Accept-Encoding: gzip
> Accept-Language: en
> Accept-Charset: iso-8859-1,*,utf-8
> 
> In the other hand, I have a file containt some
> information (addresses, restricted words, or whatever)
> like this:
> yahoo.com
> hotmail.com
> cnn.com
> abc.com
> ..
> ..
> 
> I'm at this stage:
> /* reading socket descriptor */
> read=(socket_desdriptor, buffer, sizeof (buffer));
> 
> /* then open the file tabel.txt */
> PF=fopen ("tabel.txt", "r");
> 
> /* getting the file content */
> while ((fgets (stream, 20, PF);
> 
> last step is to make comparation between *stream* and
> *buffer*...is there any match between the two
> strings...
 
You need to do something like:

for each line in *buffer {
  for each line in *file {
    if ((strstr(buffer,file)) != NULL ) {
      Do stuff for line match
    }
  }
}

> For the strings with only 'single' line in it, is not
> a problem...
> But for the strings with several even hundreds of
> line, I REALLY NEED YOUR HELP...

Since you will probably have a steady flow of *buffer for each connection,
you should think about loading all of *file into memory at the start of
the program instead of reading from disk each time.  You will need to
think of dynamic allocation of memory to do this with a file that changes.
Look at malloc() and free() for this.

> I'm sorry for my english, becouse I'm from East
> TImor...

Good English.  Good to hear of your country's independence also...


Conor
-- 
Conor Daly <conor.daly at oceanfree.net>

Domestic Sysadmin :-)
---------------------
Faenor.cod.ie
  9:38pm  up 31 days,  2:05,  0 users,  load average: 0.00, 0.00, 0.00
Hobbiton.cod.ie
  9:32pm  up 31 days,  1:41,  2 users,  load average: 0.06, 0.09, 0.07