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#include <ruby.h>
#include <ical.h>
//#define RRULE "FREQ=MONTHLY;BYMONTH=1,2,3,4,5,6,7,8,9,10,11;BYDAY=-1WE;UNTIL=20091105T220000"
//#define RRULE "FREQ=DAILY;UNTIL=20991111T220000;VFOO"
//#define DTSTART "20000101T010000"
VALUE occurrences( char *dtstart, char *dtend, char *rrule ) {
VALUE occurr = rb_ary_new();
icalerror_clear_errno();
icalerror_set_error_state( ICAL_MALFORMEDDATA_ERROR, ICAL_ERROR_NONFATAL);
struct icalrecurrencetype recur = icalrecurrencetype_from_string( rrule );
if( icalerrno != ICAL_NO_ERROR ) {
printf( "libical error: %i. -- 1\n", icalerrno );
return occurr;
}
struct icaltimetype start = icaltime_from_string( dtstart );
if( icalerrno != ICAL_NO_ERROR ) {
printf( "libical error: %i. -- 2\n", icalerrno );
return occurr;
}
struct icaltimetype end = icaltime_from_string( dtend );
if( icalerrno != ICAL_NO_ERROR ) {
printf( "libical error: %i. -- 3\n", icalerrno );
return occurr;
}
icalrecur_iterator* ritr = icalrecur_iterator_new( recur, start );
while(1) {
// char outbuf[1024] = {0};
struct icaltimetype next = icalrecur_iterator_next(ritr);
if( icaltime_is_null_time(next) || ( icaltime_compare( next, end ) > 0 ) ) {
icalrecur_iterator_free(ritr);
return occurr;
}
rb_ary_push( occurr, rb_time_new( icaltime_as_timet( next ), 0 ) );
// print_datetime_to_string( outbuf, &next );
// rb_ary_push( occurr, rb_str_new2( outbuf ) );
};
icalrecur_iterator_free(ritr);
return occurr;
}
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