Computes the absolute value of a relative binary timestamp.
    Format
      #include <utc.h>
      int utc_abstime(result, *utc1)
         utc_t result;
         const utc_t *utc1;
1 – Parameters
    Input
 utc1
    Relative binary timestamp.
    Output
 result
    Absolute value of the input relative binary timestamp.
2 – Description
    The Absolute Time routine computes the absolute value of a
    relative binary timestamp. The input timestamp represents a
    relative (delta) time.
3 – Returns
     0   Indicates that the routine executed successfully.
    -1   Indicates an invalid time parameter or invalid results.
4 – Example
    The following example scales a relative time, computes its
    absolute value, and prints the result.
    utc_t       relutc, scaledutc;
    char        timstr[UTC_MAX_STR_LEN];
    /*
     *   Make sure relative timestamp represents a positive interval...
     */
    utc_abstime(&relutc,            /* Out: Abs-value of rel time  */
                &relutc);           /* In:  Relative time to scale */
    /*
     *   Scale it by a factor of 17...
     */
    utc_multime(&scaledutc,         /* Out: Scaled relative time   */
                &relutc,            /* In:  Relative time to scale */
                17L);               /* In:  Scale factor           */
    utc_ascreltime(timstr,          /* Out: ASCII relative time    */
                   UTC_MAX_STR_LEN, /* In:  Length of input string */
                   &scaledutc);     /* In:  Relative time to       */
                                    /*      convert                */
    printf("%s\n",timstr);
    /*
     *   Scale it by a factor of 17.65...
     */
    utc_mulftime(&scaledutc,        /* Out: Scaled relative time   */
                 &relutc,           /* In:  Relative time to scale */
                 17.65);            /* In:  Scale factor           */
    utc_ascreltime(timstr,          /* Out: ASCII relative time    */
                   UTC_MAX_STR_LEN, /* In:  Length of input string */
                   &scaledutc);     /* In:  Relative time to       */
                                    /*      convert                */
    printf("%s\n",timstr);