parsing a text line vertically

[frank78]

Hi,
I have the problem of passing of more lines which I find really difficult, cause I am not experienced in C.

First Log file.
------------------------- Cat 1------ cat2-----------------
19.867: [Testdata 98095K->24545K(942080K), 0.1468955 secs]
19.845: [Testdata2 98095K->24545K(942080K), 0.1468955 secs]

I can pass it using
sscanf(line, "%*s %s %s %dK->%dK(%d%*s %d.%s %*s", &c, b, &r, &a, &o, &d, test)

but the second log file has the same information stored in the follwing way.

testdata
cat1 : 91.00 K
cat2 : 4.11 K

testdata2
cat1 : 911.00 K
cat2 : 24.11 K

I want to abstract cat1 and cat2 for every testdata.

But my problem is that I can only read a line at one time.

How can I save the position of file and give for every testdata: cat1 and cat2 simultaneously.

would appreciate anyy suggestions-

[mac11]

Hi,
I have the problem of passing of more lines which I find really difficult, cause I am not experienced in C.

First Log file.
------------------------- Cat 1------ cat2-----------------
19.867: [Testdata 98095K->24545K(942080K), 0.1468955 secs]
19.845: [Testdata2 98095K->24545K(942080K), 0.1468955 secs]

I can pass it using
sscanf(line, "%*s %s %s %dK->%dK(%d%*s %d.%s %*s", &c, b, &r, &a, &o, &d, test)

but the second log file has the same information stored in the follwing way.

testdata
cat1 : 91.00 K
cat2 : 4.11 K

testdata2
cat1 : 911.00 K
cat2 : 24.11 K

I want to abstract cat1 and cat2 for every testdata.

But my problem is that I can only read a line at one time.

How can I save the position of file and give for every testdata: cat1 and cat2 simultaneously.

would appreciate anyy suggestions-

I'd say to build a simple state machine to keep track of what testdata your working on - so, for example:
1. read a line
2. see if it's a blank line - if it is go back to #1
3. see if it's a "testdata" line - if it is stick it into some container, then go back to #1
4. if it's not a "testdata" line parse the line to get the "catx" and "xxxK" data
5. do whatever it is you do to associate the "testdata" entry you found in #3 with the "catx" and "xxxK" data sets you found in #4 (maybe you will store them up in an array somewhere, or maybe you just output them on the fly, whatever)

[frank78]

hi mac,
thank you for the fast reply.
but I am a newbie to c and don't know exactly how can i make a state machine mechanism.
is it like a case command in java? If then can you explain me or give a reference where i can look for it.

[mac11]

hi mac,
thank you for the fast reply.
but I am a newbie to c and don't know exactly how can i make a state machine mechanism.
is it like a case command in java? If then can you explain me or give a reference where i can look for it.

A state machine is just whatever system you use to keep track of what you are doing in relation to what you have done before. The way I described it in the last post I imagined you would use something like this:

char current_line[512];
 
while( /* loop until your out of input */ )
{
    ... read a line from the log file into current_line ...
 
    if( /* current_line is a "textdata" */ )
    {
        /* starting a new set of entries, if you have a 
         * collection place put textdata_line_holder
         * and your cat data in there now - or just 
         * output them or whatever */
        ... code to do that ...
 
         /* you just copied off your textdata and cat data
          * or output them or whatever - now clear out your
          * temporary variables - (reset your state) */
          ... code to clear temps ...
 
        /* now you've finished cleaning up you can start
         * tracking the next entry - copy the line so you can
         * collect or output it when you finish getting the 
         * cat entries */     
        strcpy( textdata_line_holder, current_line );
    }
    else if( /* current_line is a cat entry */ )
    {
        /* extract the cat data and put is somewhere
         * so that you can get at it later */
    }
    else 
    {
        /* this is just extra - since the log file 
         * only has textdata and cat lines this 
         * must be a blank line - I don't think you 
         * need to do anything here, but it's up to you */ 
    }
}
 

The stuff above might not be exactly what you want but it should help. I just want to give you an idea of how to structure things, not a full-blown solution.

[frank78]

Thank you for the help.

A state machine is just whatever system you use to keep track of what you are doing in relation to what you have done before. The way I described it in the last post I imagined you would use something like this:

char current_line[512];
 
while( /* loop until your out of input */ )
{
    ... read a line from the log file into current_line ...
 
    if( /* current_line is a "textdata" */ )
    {
        /* starting a new set of entries, if you have a 
         * collection place put textdata_line_holder
         * and your cat data in there now - or just 
         * output them or whatever */
        ... code to do that ...
 
         /* you just copied off your textdata and cat data
          * or output them or whatever - now clear out your
          * temporary variables - (reset your state) */
          ... code to clear temps ...
 
        /* now you've finished cleaning up you can start
         * tracking the next entry - copy the line so you can
         * collect or output it when you finish getting the 
         * cat entries */     
        strcpy( textdata_line_holder, current_line );
    }
    else if( /* current_line is a cat entry */ )
    {
        /* extract the cat data and put is somewhere
         * so that you can get at it later */
    }
    else 
    {
        /* this is just extra - since the log file 
         * only has textdata and cat lines this 
         * must be a blank line - I don't think you 
         * need to do anything here, but it's up to you */ 
    }
}
 

The stuff above might not be exactly what you want but it should help. I just want to give you an idea of how to structure things, not a full-blown solution.