Thread: Copying part of a textline

Hi,

I have been struggling with this problem for some hours now.
I want to copy a certain part of a textline.

I have tried a few approches and at the moment I am using strtok to split the text up but I don't know how to get the text after splitting it.

This is the line I'm working on:

<td align="left" valign="top"class="valuetxt" style="cursor:pointer;color:#0066FF;" onClick="javascript:rowedit('80440');">&nbsp;1&nbsp;</td>

(the bold part is what I'm after)

and this is my most successful code so far:

Code:

    char sep[6]= " ";
    char *result = NULL;

                result = strtok(c, sep);
                while(result != NULL){
                        printf("%s\n", result);
                        result = strtok(NULL, sep);

c is where the textline is located and read from.

Here I am able with the help of strtok to list up all of the splits from the textline and the second last is the one I want.

Is this a bad approch?
Any hint/tip is appreciated.


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

I was able to figure out a solution:

Code:

                result = strtok(c, sep);
                while(result != NULL){
                        //printf("%s\n", result);
                        result = strtok(NULL, sep);
                        if (strstr(result, "\">")!= NULL){
                            result = strtok(NULL, sep);
                            printf("%s \n", result);
                            break;
                        }    
                }

Code:

char sep[6]= " ";

It's not a good idea to put 7 characters in a 6-character array. Using this would be better.

Code:

char sep[]= " ";

Code:

while (fgets(c, sizeof(c), file)!= NULL && strstr(c, "p;")!= NULL){

Maybe add a counter to break on 7.

Yeah, shoot. I noticed the && strstr(c, "p;")!= NULL part after I posted. Consider moving it into the loop. You are intending to read a file line by line and parse each line for this, right?

Yes that is what I am trying to do.

I will try to move that into the loop.

------------------------
Edit
------------------------

it works now, thanks.

but it seems to crash on this line:

PHP Code:

<td align="left" valign="top" class="valuetxt" style="cursor:pointer;color:#0066FF;" onClick="javascript:rowedit('80440');">&nbsp;Nokia 6220 / Tri-Band / Vibra / MMS<br> 


I guess its to long but how can I prevent an overflow.

Say, you're just after the number between &nbsp;'s, right? Could you do something like this?

Code:

#include <stdio.h>
#include <string.h>

int main(void)
{
   const char filename[] = "file.txt";
   FILE *file = fopen(filename, "r");
   if ( file )
   {
      char line [ 256 ];
      while ( fgets(line, sizeof line, file) )
      {
         char *found = strstr(line, "&nbsp;");
         if ( found )
         {
            int number;
            if ( sscanf(found, "&nbsp;%d&nbsp;", &number) == 1 )
            {
               printf("number = %d\n", number);
            }
         }
      }
      fclose(file);
   }
   return 0;
}

It could be bent that way. But I think your strstr approach might be better.

[edit]Something like this?

Code:

#include <stdio.h>
#include <string.h>

int main(void)
{
   const char filename[] = "file.txt";
   FILE *file = fopen(filename, "r");
   if ( file )
   {
      char line [ 256 ];
      while ( fgets(line, sizeof line, file) )
      {
         const char delimiter[] = "&nbsp;";
         char *found = line;
         while ( found = strstr(found, delimiter) )
         {
            char *text = found + strlen(delimiter);
            char *end  = strstr(text, delimiter);
            if ( !end )
            {
               break;
            }
            *end = '\0';
            printf("text = \"%s\"\n", text);
            found = end + strlen(delimiter);
         }
      }
      fclose(file);
   }
   return 0;
}