Hi, I'm trying to write a program that will continuously pull up a text file, search it for anything new, and create/change a different text file if there are ever any differences in the "myfile.txt" that is being constantly searched. The problem is, when I run my code, it consumes all of my CPU. here's the code:
//Search for elements
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
#include <time.h>
#define TOTAL_KEYWORDS 12
#define SEND_NO_MORE_THAN 15
#define MAX_LISTINGS 150
#define MAX_CHARS_PER_LINE 300
/**************************************************************************************
This function searches for a keyword in a line, if the keyword
is found, it returns the position in the line array that the
first letter of the match was found, otherwise, it returns -1.
The "wild" character acts just like a blank tile in scrabble
(for the keyword)
*************************************************************************************/
int line_search(char line[], char keyword[], char wild);
/**************************************************************************************
This function searches a string for keywords. If any keyword is
found in the string, the string will go to the sent function.
Also, the character '~' can be used as a wild card character in
the keywords.
*************************************************************************************/
int search_for(char string_of_interest[MAX_CHARS_PER_LINE]);
/**************************************************************************************
This function creates the file "Send.txt", and puts the
what_to_send string into it (starting where the actual
important text is)
*************************************************************************************/
void send(char what_to_send[MAX_CHARS_PER_LINE]);
char keywords[TOTAL_KEYWORDS][20], listings[MAX_LISTINGS][MAX_CHARS_PER_LINE];
char sent[SEND_NO_MORE_THAN][MAX_CHARS_PER_LINE];
int lines_sent=0, quit=0;
int main(){
int i, j, index, hours, hit, day=0;
char dummy[10];
FILE *ifp, *ofp;
printf("For how many hours do you want to run the program?");
scanf("%d", &hours);
getchar();
//inialize the keywords
for(i=0; i<MAX_LISTINGS; i++)
memset(keywords[i], '\0', MAX_CHARS_PER_LINE );
strcpy(keywords[0], "E. ORLANDO");
strcpy(keywords[1], "E ORLANDO");
strcpy(keywords[2], "EAST ORLANDO");
strcpy(keywords[3], "UCF");
strcpy(keywords[4], "E COLONIAL");
strcpy(keywords[5], "E. COLONIAL");
strcpy(keywords[6], "EAST COLONIAL");
strcpy(keywords[7], "ALAFAYA");
strcpy(keywords[8], "ROUSE");
strcpy(keywords[9], "UNIVERSITY");
strcpy(keywords[10],"AVALON");
strcpy(keywords[11],"PEGASUS");
while((clock ()/CLOCKS_PER_SEC)<(hours*3600)){
ifp = fopen("myfile.txt", "r+");
//initialize listings
for(i=0; i<MAX_LISTINGS; i++)
memset(listings[i], '\0', MAX_CHARS_PER_LINE );
day=0;
while(day<2){
//initialize listings
for(i=0; i<MAX_LISTINGS; i++)
memset(listings[i], '\0', MAX_CHARS_PER_LINE );
//Check the listings
for(index=0; index<MAX_LISTINGS; index++){
//Get the listing
fscanf(ifp, "%[^\n]%c", listings[index], dummy);
if(strcmp(listings[index],listings[index-1])==0){
fscanf(ifp, "%c", dummy);
}
//Make everything uppercase, to eliminate case-sensitivity
for(i=0; i<MAX_CHARS_PER_LINE; i++){
listings[index][i]= toupper(listings[index][i]);
}
//This will keep track of the day
if(line_search(listings[index], "<H4>", ' ')!=-1){
day++;
break;
}
if(day==1){
//Search the listing for all the keywords, this function will also
//output the .txt file
hit = search_for(listings[index]);
}
}//closing the inner loop that does everything
}//closing the outer loop so the file can be reopened
fclose(ifp);
}//closing clock loop
return 0;
}
/**************************************************************************************
This function searches for a keyword in a line, if the keyword
is found, it returns the position in the line array that the
first letter of the match was found, otherwise, it returns -1.
The "wild" character acts just like a blank tile in scrabble
(for the keyword)
*************************************************************************************/
int line_search(char line[], char keyword[], char wild) {
int i, j, key_length, line_length, k=0;
key_length = strlen(keyword);
line_length = strlen(line);
for(i=0; i<=(line_length-key_length); i++){
for(j=0; j<key_length; j++){
if (line[i+j]==keyword[j]||wild==keyword[j]){
k++;
}
else{
k=0;
break;
}
}
if(k==key_length)
return i;
}
return -1;
}
/**************************************************************************************
This function searches a string for keywords. If any keyword is
found in the string, the string will go to the sent function.
Also, the character '~' can be used as a wild card character in
the keywords.
*************************************************************************************/
int search_for(char string_of_interest[MAX_CHARS_PER_LINE]){
int i, j, was_it_sent=0;
//For each keyword
for(i=0;i<TOTAL_KEYWORDS;i++){
//Search the string for
if(line_search(string_of_interest, keywords[i], '~')!=-1){
//If this is the first time anything is sent
if(lines_sent==0){
//Send it on through
send(string_of_interest);
//Mark that it has just been sent
was_it_sent++;
}
//For every other time
else{
//Check every other line that has been sent
for(j=0;j<lines_sent;j++){
//If it has been sent already
if(strcmp(string_of_interest, sent[j])==0){
//Mark that it was sent before
was_it_sent--;
break;
}
}
//If it hasn't been sent
if(was_it_sent==0){
//Send it on through
send(string_of_interest);
//Mark that it has just been sent
was_it_sent++;
}
}//Out of the else statement
break;
}//Out of the if the keyword was found statement
}//Out of the keyword loop
return was_it_sent;
}
/**************************************************************************************
This function creates the file "Send.txt", and puts the
what_to_send string into it (starting where the actual
important text is)
*************************************************************************************/
void send(char what_to_send[MAX_CHARS_PER_LINE]){
FILE *ofp;
int i;
strcpy(sent[lines_sent], what_to_send);
lines_sent++;
printf("\n\nsend:\n");
ofp = fopen("Send.txt", "w");
for(i=63;i<MAX_CHARS_PER_LINE;i++){
fprintf(ofp, "%c", what_to_send[i]);
printf("%c", what_to_send[i]);
}
printf("\n\n|%s|sent!!!!\n\n\n", sent[lines_sent-1]);
fclose(ofp);
}I feel like the problem might be that I'm not using any pointers, and the arrays are taking up all of the CPU's main registers. I've never had a problem like this before, though. Any advice would be greatly appreciated =)
Thanks,
Matt
