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I have a string
16:23:18.659343 131.188.37.230.22 131.188.37.59.1398 tcp 168

for example lets say for the above string
16:23:18.659343 -- time
131.188.37.230 -- srcaddress
22 --srcport
131.188.37.59 --destaddress
1398 --destport
tcp --protocol
168 --size
i need to split the string such that i need to get all these
parameters....
the field widths are not fixed..i have some times four/three digits
srcport ..so i cant do it with substr function...i need this in c++
i am not getting an idea how to split it..
thank you for any help

Google for c++ explode, you'll find a lot of infos on how to do it.

See "A string tokenizer" here: http://oopweb.com/CPP/Documents/CPPH...g-HOWTO-7.html

Regards.

--
Jim Langston

"xyz" <> wrote in message
news:8daf3ab2-37ef-47ac-b2b4-...
>I have a string
> 16:23:18.659343 131.188.37.230.22 131.188.37.59.1398 tcp 168
>
> for example lets say for the above string
> 16:23:18.659343 -- time
> 131.188.37.230 -- srcaddress
> 22 --srcport
> 131.188.37.59 --destaddress
> 1398 --destport
> tcp --protocol
> 168 --size
> i need to split the string such that i need to get all these
> parameters....
> the field widths are not fixed..i have some times four/three digits
> srcport ..so i cant do it with substr function...i need this in c++
> i am not getting an idea how to split it..
> thank you for any help

Not complete but giving you all the pieces.

You should use your favorite method for converting from strings to ints,
I'im showing a manual stringstream way, but I use a template myself.

Output is:

16:23:18.659343 -- time
131.188.37.230.22 -- srcaddress/port
131.188.37.59.1398 -- destaddress/port
tcp -- protocol
168 -- size

131.188.37.230 : 22

#include <string>
#include <sstream>
#include <iostream>

int main()
{
std::string Input( "16:23:18.659343 131.188.37.230.22 131.188.37.59.1398
tcp 168" );
std::stringstream Stream( Input );

std::string Time;
std::string SrcAddressPort;
std::string DestAddressPort;
std::string Protocol;
int Size;

if ( Stream >> Time >> SrcAddressPort >> DestAddressPort >> Protocol >>
Size )
{
std::cout << Time << " -- time\n" <<
SrcAddressPort << " -- srcaddress/port\n" <<
DestAddressPort << " -- destaddress/port\n" <<
Protocol << " -- protocol\n" <<
Size << " -- size\n\n";
}
else
std::cerr << "Parsing error\n";

std::string SrcAddress;
std::string PortString;
int SrcPort = 0;

SrcAddress = SrcAddressPort.substr( 0,
SrcAddressPort.find_last_of('.') );
PortString = SrcAddressPort.substr( SrcAddressPort.find_last_of('.') +
1, std::string::npos );

std::stringstream Convert;
Convert << PortString;
Convert >> SrcPort;

std::cout << SrcAddress << " : " << SrcPort << "\n";

}

"xyz" <> wrote in message
news:8daf3ab2-37ef-47ac-b2b4-...
>I have a string
> 16:23:18.659343 131.188.37.230.22 131.188.37.59.1398 tcp 168
>
> for example lets say for the above string
> 16:23:18.659343 -- time
> 131.188.37.230 -- srcaddress
> 22 --srcport
> 131.188.37.59 --destaddress
> 1398 --destport
> tcp --protocol
> 168 --size
> i need to split the string such that i need to get all these
> parameters....
> the field widths are not fixed..i have some times four/three digits
> srcport ..so i cant do it with substr function...i need this in c++
> i am not getting an idea how to split it..
> thank you for any help

Parsing is best solved formally with a parser generator, for which the best
option is to write a grammar.

Below is a LL(1) grammar written as source code for slk parser:
LL(1) grammar is very similar to hand written parsing

http://home.earthlink.net/~slkpg/

In the grammar the parts prefixed with "__" are actions which you write
code for in C++ (or C ,Java or C#).
Slk does most of the rest of the working in creating the application

----------------

/*
slk grammar
integer and tcp are terminals from the lexer
*/

parser :
time src dest proto

time:
integer __hr : integer __min : integer __sec_int [ . integer __sec_frac ]

src:
integer __s1 . integer __s2 . integer __s3 . integer __s4 . integer __port

dest:
integer __d1 . integer __d2 . integer __d3 . integer __d4

proto:
tcp integer __size


-----------------

regards
Andy Little

On Apr 29, 3:32*pm, "kwikius" <a...@servocomm.freeserve.co.uk> wrote:
> "xyz" <lavanyaredd...@gmail.com> wrote in message
>
> news:8daf3ab2-37ef-47ac-b2b4-...
>
>
>
> >I have a string
> > 16:23:18.659343 131.188.37.230.22 131.188.37.59.1398 tcp 168
>
> > for example lets say for the above string
> > 16:23:18.659343 -- time
> > 131.188.37.230 * -- srcaddress
> > 22 * * * * * * * * * * * *--srcport
> > 131.188.37.59 * *--destaddress
> > 1398 * * * * * * * * *--destport
> > tcp * * * * * * * * * *--protocol
> > 168 * * * * * * * * *--size
> > i need to split the string such that i need to get all these
> > parameters....
> > the field widths are not fixed..i have some times four/three digits
> > srcport ..so i cant do it with substr function...i need this in c++
> > i am not getting an idea how to split it..
> > thank you for any help
>
> Parsing is best solved formally with a parser generator, for which the best
> option is to write a grammar.
>
> Below is a LL(1) grammar written as source code for slk parser:
> LL(1) *grammar is very similar to hand written parsing
>
> http://home.earthlink.net/~slkpg/
>
> In the grammar the *parts prefixed with "__" are actions which you write
> code for in C++ (or C ,Java or C#).
> Slk does most of the rest of the working in creating the application
>
> ----------------
>
> /*
> slk grammar
> integer and tcp are terminals *from the lexer
> */
>
> parser :
> * time src dest proto
>
> time:
> * integer __hr : integer __min : integer *__sec_int [ . integer __sec_frac ]
>
> src:
> * integer __s1 . integer __s2 . integer __s3 . integer __s4 . integer __port
>
> dest:
> * integer __d1 . integer __d2 . integer __d3 . integer __d4
>
> proto:
> * tcp integer __size
>
> -----------------
>
> regards
> Andy Little

i solved it....thanks to all

xyz wrote:

> I have a string

Pick a language. You posted the same thing (twice) to comp.lang.c.





Brian

Jim Langston wrote:
>> I have a string
>> 16:23:18.659343 131.188.37.230.22 131.188.37.59.1398 tcp 168
>>
>> for example lets say for the above string
>> 16:23:18.659343 -- time
>> 131.188.37.230 -- srcaddress
>> 22 --srcport
>> 131.188.37.59 --destaddress
>> 1398 --destport
>> tcp --protocol
>> 168 --size
>> i need to split the string such that i need to get all these
>> parameters....
>> the field widths are not fixed..i have some times four/three digits
>> srcport ..so i cant do it with substr function...i need this in c++
>> i am not getting an idea how to split it..
>> thank you for any help
>
> Not complete but giving you all the pieces.
>
> You should use your favorite method for converting from strings to
> ints, I'im showing a manual stringstream way, but I use a template
> myself.
> Output is:
>
> 16:23:18.659343 -- time
> 131.188.37.230.22 -- srcaddress/port
> 131.188.37.59.1398 -- destaddress/port
> tcp -- protocol
> 168 -- size
>
> 131.188.37.230 : 22
>
> #include <string>
> #include <sstream>
> #include <iostream>
>
> int main()
> {
> std::string Input( "16:23:18.659343 131.188.37.230.22
> 131.188.37.59.1398 tcp 168" );
> std::stringstream Stream( Input );
>
> std::string Time;
> std::string SrcAddressPort;
> std::string DestAddressPort;
> std::string Protocol;
> int Size;
>
> if ( Stream >> Time >> SrcAddressPort >> DestAddressPort >>
> Protocol >> Size )
> {
> std::cout << Time << " -- time\n" <<
> SrcAddressPort << " -- srcaddress/port\n" <<
> DestAddressPort << " -- destaddress/port\n" <<
> Protocol << " -- protocol\n" <<
> Size << " -- size\n\n";
> }
> else
> std::cerr << "Parsing error\n";
>
> std::string SrcAddress;
> std::string PortString;
> int SrcPort = 0;
>
> SrcAddress = SrcAddressPort.substr( 0,
> SrcAddressPort.find_last_of('.') );
> PortString = SrcAddressPort.substr(
> SrcAddressPort.find_last_of('.') + 1, std::string::npos );

Oh, I forgot about a substr overload. This line can be simplified to:
PortString = SrcAddressPort.substr( SrcAddressPort.find_last_of('.') +
1 );

std::string::npos is default for 2nd paramenter.

> std::stringstream Convert;
> Convert << PortString;
> Convert >> SrcPort;
>
> std::cout << SrcAddress << " : " << SrcPort << "\n";
>
> }

--
Jim Langston

On Apr 29, 3:32 pm, "kwikius" <a...@servocomm.freeserve.co.uk> wrote:
> "xyz" <lavanyaredd...@gmail.com> wrote in message
> >I have a string
> > 16:23:18.659343 131.188.37.230.22 131.188.37.59.1398 tcp 168

> > for example lets say for the above string
> > 16:23:18.659343 -- time
> > 131.188.37.230 -- srcaddress
> > 22 --srcport
> > 131.188.37.59 --destaddress
> > 1398 --destport
> > tcp --protocol
> > 168 --size
> > i need to split the string such that i need to get all these
> > parameters....
> > the field widths are not fixed..i have some times four/three digits
> > srcport ..so i cant do it with substr function...i need this in c++
> > i am not getting an idea how to split it..

> Parsing is best solved formally with a parser generator, for
> which the best option is to write a grammar.

I don't think that there's a general consensus about that. None
of the C++ compilers I know use a parser generator for their
grammar, for example, but prefer hand written ones.

In the case at hand, of course, you don't even need a full
parser; his problem can be solved simply by means of extended
regular expressions, such as those supported by boost::regex.

--
James Kanze (GABI Software) email:
Conseils en informatique orientée objet/
Beratung in objektorientierter Datenverarbeitung
9 place Sémard, 78210 St.-Cyr-l'École, France, +33 (0)1 30 23 00 34

James Kanze wrote:
> On Apr 29, 3:32 pm, "kwikius" <a...@servocomm.freeserve.co.uk> wrote:
>> "xyz" <lavanyaredd...@gmail.com> wrote in message
>>> I have a string
>>> 16:23:18.659343 131.188.37.230.22 131.188.37.59.1398 tcp 168
>
>>> for example lets say for the above string
>>> 16:23:18.659343 -- time
>>> 131.188.37.230 -- srcaddress
>>> 22 --srcport
>>> 131.188.37.59 --destaddress
>>> 1398 --destport
>>> tcp --protocol
>>> 168 --size
>>> i need to split the string such that i need to get all these
>>> parameters....
>>> the field widths are not fixed..i have some times four/three digits
>>> srcport ..so i cant do it with substr function...i need this in c++
>>> i am not getting an idea how to split it..
>
>> Parsing is best solved formally with a parser generator, for
>> which the best option is to write a grammar.
>
> I don't think that there's a general consensus about that. None
> of the C++ compilers I know use a parser generator for their
> grammar, for example, but prefer hand written ones.
>
> In the case at hand, of course, you don't even need a full
> parser; his problem can be solved simply by means of extended
> regular expressions, such as those supported by boost::regex.

Reading up on C++0x it is supposed to contain regular expressions. Which is
good for this, but bad because I hate regex.

But, truthfully, having regex in the language will make parsing this type of
thing a *lot* easier. Although to me regex expressions usually look like
just so much line noise.

--
Jim Langston