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Full Discussion: How to compare the time in different format from a file?
Top Forums Shell Programming and Scripting How to compare the time in different format from a file? Post 302747613 by Don Cragun on Friday 21st of December 2012 09:31:39 PM
Old 12-21-2012
I tried using floating point (as Jim suggested), but with some additional testing I found the results were occasionally off by a microsecond. The following seems to work even when time stamps roll over to the next day. (It still assumes that there is always less than 24 hours between adjacent time stamps.) If you're running on a Solaris system, use nawk or /usr/xpg4/bin/awk instead of awk:
Code:
awk -F '  ' '{  
        if(split($1, nf, /[:.]/) != 4) {
                printf "Time stamp split for \"%s\" on line %d failed\n", $1, NR
                exit 1 
        }
        if(NR > 1) {
                usec = nf[4] - lf[4]
                sec = nf[3] - lf[3]
                min = nf[2] - lf[2]
                hr = nf[1] - lf[1]
                if(usec < 0) {usec += 1000000; sec--}
                if(sec < 0) {sec += 60; min--}
                if(min < 0) {min += 60; hr--}
                if(hr < 0) hr += 24
                printf "%2d:%02d:%02d.%06d\n", hr, min, sec, usec
        }
        for(i = 1; i <= 4; i++) lf[i] = nf[i]
        printf "%20s: ", $2
}
END {   printf "unknown (no end time stamp)\n"
}' in

with the file in containing:
Code:
15:09:50.350038  Reading A Data
15:09:50.371645  Reading B Data
15:10:55.655724  Initializing models
15:11:31.320920  Preparing Simulation
15:11:32.763217  Running Calculation
15:15:29.668882  Aggregating Results
15:15:29.950897  Persisting Results
23:59:59.000000  1 minute to midnight
00:00:00.000000  midnight
23:59:59.999999  eod
00:00:00.000001  early
00:00:00.000000  next midnight

the ouput produced is:
Code:
      Reading A Data:  0:00:00.021607
      Reading B Data:  0:01:05.284079
 Initializing models:  0:00:35.665196
Preparing Simulation:  0:00:01.442297
 Running Calculation:  0:03:56.905665
 Aggregating Results:  0:00:00.282015
  Persisting Results:  8:44:29.049103
1 minute to midnight:  0:00:01.000000
            midnight: 23:59:59.999999
                 eod:  0:00:00.000002
               early: 23:59:59.999999
       next midnight: unknown (no end time stamp)

This User Gave Thanks to Don Cragun For This Post:
manas_ranjan
 

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LEARN ABOUT OPENSOLARIS

sdl_cdopen

SDL_CDOpen(3)							 SDL API Reference						     SDL_CDOpen(3)

NAME

       SDL_CDOpen - Opens a CD-ROM drive for access.

SYNOPSIS

       #include "SDL.h"

       SDL_CD *SDL_CDOpen(int drive);

DESCRIPTION

       Opens  a CD-ROM drive for access. It returns a SDL_CD structure on success, or NULL if the drive was invalid or busy. This newly opened CD-
       ROM becomes the default CD used when other CD functions are passed a NULL CD-ROM handle.

       Drives are numbered starting with 0. Drive 0 is the system default CD-ROM.

EXAMPLES

       SDL_CD *cdrom;
       int cur_track;
       int min, sec, frame;
       SDL_Init(SDL_INIT_CDROM);
       atexit(SDL_Quit);

       /* Check for CD drives */
       if(!SDL_CDNumDrives()){
	 /* None found */
	 fprintf(stderr, "No CDROM devices available
       ");
	 exit(-1);
       }

       /* Open the default drive */
       cdrom=SDL_CDOpen(0);

       /* Did if open? Check if cdrom is NULL */
       if(!cdrom){
	 fprintf(stderr, "Couldn't open drive: %s
       ", SDL_GetError());
	 exit(-1);
       }

       /* Print Volume info */
       printf("Name: %s
       ", SDL_CDName(0));
       printf("Tracks: %d
       ", cdrom->numtracks);
       for(cur_track=0;cur_track < cdrom->numtracks; cur_track++){
	 FRAMES_TO_MSF(cdrom->track[cur_track].length, &min, &sec, &frame);
	 printf("     Track %d: Length %d:%d
       ", cur_track, min, sec);
       }

       SDL_CDClose(cdrom);

SEE ALSO

       SDL_CD, SDL_CDtrack, SDL_CDClose

SDL
							      Tue 11 Sep 2001, 22:58						     SDL_CDOpen(3)
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