From: Mayo (g17mayo_at_[hidden])
Date: 2001-06-06 16:31:41
Hi,
I am developing an application that monitors net traffic and decodes
messages into readable text format.
The application needs to have a facility that can match individual
fields in the text form of the messages, in order to troubleshoot
problems in the system more easily. So I chose to use Dr. Maddock's
regex++ cause it seems to be easy to use and also offers a fast
matching algorithm something that is critical to what I am developing.
The problem I am facing is that although I use regex_match()
similarly with the example in the documantation, it seems that
regex_match() returns always false.
I use regex_match as follows:
----------------------------------------------------------------------
/**> Code
** Usage of regex_match()
**
**/
using namespace boost
regex match_ex("fieldX = Y");
bool MatchCheck( const::std string *message )
{
if( regex_match(message.begin(), message.end(), what, match_ex,
match_default)
{
//do something
//and return true
}
else
{
//do something else
//and return false
}
}
----------------------------------------------------------------------
variable message is a buffer that holds the decoded message which is
in a following format.
-----------------------------
date:source_ip->dest_ip
MESSAGE_TYPE
field1 = 1
field2 = 2
field3 = 3
.
.
fieldn = n
----------------------------
I really can figure out why that always returns false there is
definately something I am missing. Unfortunately I am not very
familiar neither with regex++ nor with the GNU regular expression
library so I am a bit stuck.
I would greately appreciate any kind of help and pointers that can
help me identify the nature of the problem.
Regards,
George P.