Thread: strstr and '\0'

in the following function
If the line has at least two instances of the search string starting at or after the user-supplied interger offset, dump the part of the line between but NOT including the first two instances to the output file along with a '\n'.

Code:

void FileSearch(char *filename, char *OutFile, char *SearchString, int StartSrch)
{

	char *ptr1,*ptr2,Line[MAXLEN];
	FILE *fpIn, *fpOut;
	int Len;
	fpIn  = Fopen (filename, "r");
	fpOut = Fopen (OutFile,  "w");

	Len = strlen(SearchString);
while (fgets(Line,MAXLEN, fpIn) != NULL)
{
	ptr1 = strstr(Line + StartSrch, SearchString);

	if(ptr1)
         {
	   ptr2 = strstr(ptr1 + Len,SearchString);
	   if(ptr2)
	    {
	      
	     *ptr2     = '\0'';
	      ptr1    += Len;
            }
         }
	else ptr1 = Line;
	   fputs(ptr1, fpOut);

}
	Fclose(fpIn);
	Fclose(fpOut);
}

If the fputs prints up to the '\0' and I write *ptr2 = '\0'
it continues printing the next line on the same line.

also I have a “wrapper.h”
for the Fopen and Fclose cases.

shouldn't you put ptr1 += Len + 1; then?

Also, that is a fancy while loop indentation you got going on there, bud.

ok that takes care of the space in the begining,
but it still prints the remainder of what is left after the second SearchString on the next line.
and thanks
I like fancy, bud

I am not entirely understanding the point of the second '\0', actually. You just skip past it anyway. The lovely Elysia wrote these maybe you should check them out.

The reason I put the *ptr2 = '\0'';
was to get fputs to stop printing before the second SearchString
dump the part of the line between but NOT including the first two instances.

Thanks,
I will run this around a few times and see what happens

Matus, are you in his class or are you his professor? Either has some potential hilarious factor.

ehhhhhhhh wrong
the correct response would have been

Code:

void FileSearch(char *filename, char *OutFile, char *SearchString, int StartSrch)
{

	char *ptr1,*ptr2,Line[MAXLEN];
	FILE *fpIn, *fpOut;
	int Len;
	fpIn  = Fopen (filename, "r");
	fpOut = Fopen (OutFile,  "w");

	Len = strlen(SearchString);
while (fgets(Line,MAXLEN, fpIn) != NULL){
	ptr1 = strstr(Line + StartSrch, SearchString);
       
	
	if(ptr1){
	   ptr2 = strstr(ptr1 + Len,SearchString);
	   if(ptr2){
	      ptr2[-1] = '\n';
	     *ptr2     = '\0';
	      ptr1    += Len + 1;
	      
           } 
         }
	else ptr1 = Line;
	   fputs(ptr1,fpOut);

}
	Fclose(fpIn);
	Fclose(fpOut);
}

If one were using strtok() correctly... the correct response would have been not asking a question at all.

there is are are many roads leading to the same location.

you are quite the helpful bee
c+ expert

you have a lot of criticism by no helpful code!
take your own advise and go roll around in the grass somewhere.
C+ expert

My code does exactly what you asked. Takes a string and returns the characters between the substring and allows you to pick an offset.

You can add the newline character if you want at the end.

YES it did work
MeThoDz

and I thank you for your help.
That master5001 guy seemed like he was more interested in putitng people down than helping
again thank you