diff options
Diffstat (limited to 'libntp/ymd2yd.c')
-rw-r--r-- | libntp/ymd2yd.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/libntp/ymd2yd.c b/libntp/ymd2yd.c new file mode 100644 index 0000000..c6b3a0c --- /dev/null +++ b/libntp/ymd2yd.c @@ -0,0 +1,26 @@ +/* + * ymd2yd - compute the date in the year from y/m/d + * + * A thin wrapper around a more general calendar function. + */ + +#include <config.h> +#include "ntp_stdlib.h" +#include "ntp_calendar.h" + +int +ymd2yd( + int y, + int m, + int d) +{ + /* + * convert y/m/d to elapsed calendar units, convert that to + * elapsed days since the start of the given year and convert + * back to unity-based day in year. + * + * This does no further error checking, since the underlying + * function is assumed to work out how to handle the data. + */ + return ntpcal_edate_to_yeardays(y-1, m-1, d-1) + 1; +} |