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#1
09-28-2005
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How to read specific lines in a bulk file using C file Programming
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 
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#2
09-28-2005
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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  rishi
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#3
09-28-2005
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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:
Code:
#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;
}
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#5
10-03-2005
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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
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#6
10-03-2005
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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.
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