How to read specific lines in a bulk file using C file Programming

Applications Programming
1

Please Help me

I have a Bulk file containing Hex data
I want to read specific lines from that bulk file by ID number.

example
ID DATE Time data
14 2005/09/28 07:40:08.546 0 5 078B1C 01916C 0FE59C 004B54 0A9670 0D04ED 05B6B4 0E2223 04B089 06AE50 000000 000000 000000

14 2005/09/28 07:42:27.765 0 5 078B1C 01916C 0A605E 08008A 04B85C 0D06D2 05B760 083222 045489 0CB190 000000 000000 000000

14 2005/09/28 07:44:41.274 0 5 078B1C 01916C 0FB19E 004B54 0A96AB 0D04ED 05B6B4 0E2223 04B089 06AE50 000000 000000 000000

suppose from that bulk file I want to read above Id 14 how it is possible.
by using c file programming.

please provide me code.

thanks
rajan

2

Hi Rajan,

Where is the difficulty you are facing?
Is the bulk nature of file bogging you or is it only two days for weekend to come :smiley:

rishi

3

You always have to read the whole file to find all records. This (minus error checking) is how to do it, by writing a simple filter:

#include <stdio.h>
void process_data(char *src)
{
     fprintf(stdout,"%s", src); /* do stuff with the data*/
}

int main()
{
    char tmp[256]={0x0};
    FILE *in=fopen"myfile","r");
    while(fgets(tmp,sizeof(tmp),in)!=NULL)
    {
         int testvalue=atoi(tmp);  /* atoi stops translating to an int
                                              when it hits a blank */
         if(test==14) process_data(tmp);
    }
    fclose(in);
    return 0;
}
4

you can use "cspilt" shell command to do that

5

Dear Friends,

The code you have given for Extractiong required data from file is working fine.
Thank u for your reply.
I have Extracted this data from file by using this code.

15711 2005/10/03 08:28:25.512 0 1 0B160E 06C67E 0A7F80 04C000 000000 000000 000000 000000 000000 000000 000000 000000 000000

  15711  2005/10/03  08:29:57.517  0  1 0BE202 08C37E 007380 04A000 000000 000000 000000 000000 000000 000000 000000 000000 000000

  15711  2005/10/03  08:31:29.502  0  1 0B9806 09C4DE 097800 048000 000000 000000 000000 000000 000000 000000 000000 000000 000000

  15711  2005/10/03  08:33:01.507  0  1 0BDC0A 0BC5FE 0E7D00 04C000 000000 000000 000000 000000 000000 000000 000000 000000 000000

Now I wanted to write only the Hexadecimal data in separate file like this.

0B160E 06C67E 0A7F80 04C000 000000 000000 000000 000000 000000 000000 000000 000000 000000

from the above data simultaniously I have to leave starting 0 digit in each filed.and write into a separate file.

please provide C code for me

Iam ever thankful to you

regards

rajan

6

Please read our rules and note:
(4) Do not 'bump up' questions if they are not answered promptly. No duplicate or cross-posting and do not report a post where your goal is to get an answer more quickly.

I will delete the thread where you post a second copy of this follow-up question.

7

anybody please send reply to my post.

awiting for your replies

thank u

regards
rajan

8

A post like that is a "bump up". Do not violate our rules again.

9

Dear friends

anybody please give reply to my above post.

regards
rajan

10

Please give reply anybody to the above post

11

please provide some code to the above post.

I can't get it.

regards
rajan