proj/mag/ambig/apps/obstime2maskid.c

/*
 * Name:        obstime2maskid.c
 *
 * Description:     Convert TAI to noise mask id.
 *
 * Version:     v1.0        Dec 11 2013
 *              v2.0        Apr 22 2015
 *
 * Note:
 * v2.0
 *      Move the times into external text file, return -1 if not found
 *      times in the text file must be sorted
 *          
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#define TIMEFILE    "proj/mag/ambig/apps/data/masktime.txt"

int obstime2maskid(TIME tobs)
{
    char ttemp[64];
    int MaskIndex = 0;
    FILE *fptr;
    TIME tid;
    
    /* Snippet from Art to obtain data file */
    
    char lpath[256], spath[256], *needle;

    /* Obtain data path relative to binary path. */
    if (readlink("/proc/self/exe", spath, sizeof(spath)) == -1)
    {
        fprintf(stderr, "Cannot locate this binary.\n");
        return -1;
    }
    else
    {
        if ((needle = strstr(spath, DRMS_ARCH)) != NULL)
        {
            needle += strlen(DRMS_ARCH);
            *needle = '\0';
            
            /* We have the path to the make output directory. Now we need
             * to get the parent and append the data file */
            snprintf(lpath,
                    sizeof(lpath),
                    "%s/../%s",
                    spath,
                    TIMEFILE);
        }
        else
        {
            fprintf(stderr, "Cannot find architecture %s subpath.\n", DRMS_ARCH);
            return -1;
        }
    }
    printf("lpath: %s\n", lpath);

    /* Start */
    
    fptr = fopen(lpath, "r");
    if (!fptr) {
        printf("Time file for mask cannot be found, return -1.\n");
        return -1;      // if error, return -1, so no mask will be found
    }
    
    while (fgets(ttemp, 64, fptr) != NULL) {
        tid = sscan_time(ttemp);
//      printf("id=%d; t=%s; tid=%lf\n", MaskIndex, ttemp, tid);
        if (tobs < tid) {
            fclose(fptr);
            return MaskIndex;
        }
        MaskIndex++;
    }

    fclose(fptr);

    return MaskIndex;
    
}

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