Programming

$ cat between.c
#include <stdio.h>

int main(void)
{
        const char *start="START", *end="END";

        while(!feof(stdin))
        {
                int c, spos=0;

                while((c=fgetc(stdin)) >= 0)
                {
                        // If it doesn't match, ignore it and start over.
                        if(c != start[spos])
                        {
                                spos=0;
                                // if it doesn't match start[n], it might
                                // match start[0], so check again.
                                if(c != start[0])
                                        continue;
                        }

                        // Increment position in the START string
                        // and check if we found a complete START.
                        if(start[++spos] == '\0') // complete START
                                break;
                }

                if(c<0) break; // No START, just EOF

                spos=0;
                // Search for END
                while((c=fgetc(stdin)) >= 0)
                {
                        if(c != end[spos])
                        {
                                int n;
                                // This time, we have to print everything
                                // we can prove didn't match.
                                fwrite(end, spos, 1, stdout);
                                spos=0;
                                if(c != end[0])
                                {
                                        fputc(c, stdout);
                                        continue;
                                }
                        }

                        if(end[++spos] == '\0') // complete END
                        {
                                // print a newline after each END is found
                                fputc('\n', stdout);
                                break;
                        }
                }
        }

        return(0);
}
$ gcc between.c
$ echo "STSTART A END B START C ENEND D" | ./a.out
 A
 C EN
$

$ cat begintrans.c
#include <stdio.h>
#include <string.h>

int main(void)
{
	char buf[16384];

	int transcount=0, elapsetotal=0;

	while(!feof(stdin))
	{
		int newoluf=0, elapsetime=-1;
		char timestamp[64]={0};

		buf[0]='\0';	// Blank out buffer

		while(strcmp(buf, "BEGINTRANS\n") != 0)	// look for BEGINTRANS
		if(fgets(buf, 16384, stdin) == NULL)
			break;	// EOF

		if(feof(stdin)) break;

		while(strcmp(buf, "ENDTRANS\n") != 0)	// Look for ENDTRANS
		{
			const char *tsstr;
			if(fgets(buf, 16384, stdin) == NULL)
				break;

			if(strstr(buf, "NEWOLUF2") != NULL)
				newoluf=1;

			if(tsstr=strstr(buf, "Timestamp"))
				sscanf(tsstr, "Timestamp <%[^>]>", timestamp);

			if(strncmp(buf, "ElapseTime", 10) == 0)
				sscanf(buf, "ElapseTime <%d>", &elapsetime);
		}

		if((elapsetime>=0) && (timestamp[0]))
		{
			transcount++;
			elapsetotal += elapsetime;
			printf("trans %d, elapsetime %d, timestamp %s\n",
				transcount, elapsetime, timestamp);
		}
	}

	printf("Average elapsetime is %d\n", elapsetotal / transcount);
	return(0);
}
$ gcc begintrans.c -o begintrans
$ ./begintrans < data
trans 1, elapsetime 745, timestamp 14Sep1111-07-37
trans 2, elapsetime 765, timestamp 14Sep1111-07-37
trans 3, elapsetime 579, timestamp 14Sep1111-07-37
trans 4, elapsetime 356, timestamp 14Sep1111-07-38
trans 5, elapsetime 651, timestamp 14Sep1111-07-41
trans 6, elapsetime 292, timestamp 14Sep1111-07-42
trans 7, elapsetime 345, timestamp 14Sep1111-07-52
Average elapsetime is 533
$