/sys$common/syshlp/helplib.hlb DCE_DTS, Application Routines, utc_mkanytime  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 NAME

   utc_mkanytime - Converts a tm structure and TDF (expressing the time
                   in an arbitrary time zone) to a binary timestamp

 SYNOPSIS

   #include <dce/utc.h>

   int utc_mkanytime( utc_t *utc,
                      struct tm *timetm,
                      long tns,
                      struct tm *inacctm,
                      long ins,
                      long tdf );

 PARAMETERS

   Input

   timetm
          A tm structure that expresses the local time; tm_wday and
          tm_yday are ignored on input; the value of tm_isdt should
          be -1.

   tns    Nanoseconds since the Time component.

   inacctm
          A tm structure that expresses days, hours, minutes, and
          seconds of inaccuracy.  If a null pointer is passed, or
          if tm_yday is negative, the inaccuracy is considered to be
          unspecified; tm_mday, tm_mon, tm_wday, and tm_isdst are
          ignored on input.

   ins    Nanoseconds of the inaccuracy component.

   tdf    Time Differential Factor to use in conversion.

   Output

   utc    Resulting binary timestamp.

 DESCRIPTION

   The utc_mkanytime() routine converts a tm structure and TDF (expressing
   the time in an arbitrary time zone) to a binary timestamp.  Required
   inputs include nanoseconds since Time and nanoseconds of inaccuracy.

 RETURN VALUES

    0    Indicates that the routine executed successfully.

   -1    Indicates an invalid time argument or invalid results.

 EXAMPLES

   The following example converts a string ISO format time in an arbitrary
   time zone to a binary timestamp. This may be part of an input timestamp
   routine, although a real implementation will include range checking.

        utc_t       utc;
        struct tm   tmtime, tminacc;
        float       tsec, isec;
        double      tmp;
        long        tnsec, insec;
        int         i, offset, tzhour, tzmin, year, mon;
        char        *string;

        /*  Try to convert the string...                               */

        if(sscanf(string, "%d-%d-%d-%d:%d:%e+%d:%dI%e",
                  &year, &mon, &tmtime.tm_mday, &tmtime.tm_hour,
                  &tmtime.tm_min, &tsec, &tzhour, &tzmin, &isec) != 9) {

        /*  Try again with a negative TDF...                           */
        if (sscanf(string, "%d-%d-%d-%d:%d:%e-%d:%dI%e",
                   &year, &mon, &tmtime.tm_mday, &tmtime.tm_hour,
                   &tmtime.tm_min, &tsec, &tzhour, &tzmin, &isec) != 9) {

        /*  ERROR                                                      */
                exit(1);
            }

        /*  TDF is negative                                            */
            tzhour = -tzhour;
            tzmin = -tzmin;
        }

        /*  Fill in the fields...                                      */
        tmtime.tm_year = year - 1900;
        tmtime.tm_mon = --mon;
        tmtime.tm_sec = tsec;
        tnsec = (modf(tsec, &tmp)*1.0E9);
        offset = tzhour*3600 + tzmin*60;
        tminacc.tm_sec = isec;
        insec = (modf(isec, &tmp)*1.0E9);

        /* Convert to a binary timestamp...                            */
        utc_mkanytime(&utc,    /* Out: Resultant binary timestamp      */
                      &tmtime, /* In:  tm struct that represents input */
                      tnsec,   /* In:  Nanoseconds from input          */
                      &tminacc,/* In:  tm struct that represents inacc */
                      insec,   /* In:  Nanoseconds from input          */
                      offset); /* In:  TDF from input                  */

 RELATED INFORMATION

   Functions: utc_anytime
              utc_anyzone