Add prototype for max_position_points option to KML writer.

diff --git a/kml.c b/kml.c
index e8f5dec668dc00d843aa36d669ec3a1d90f2c4c4..684ec27f40297116c8b2036ecd76df0d2fc0e0a2 100644 (file)
--- a/kml.c
+++ b/kml.c
@@ -33,12 +33,15 @@ static char *opt_extrude = NULL;
 static char *opt_trackdata = NULL;
 static char *opt_units = NULL;
 static char *opt_labels = NULL;
+static char *opt_max_position_points = NULL;
 
 static int export_lines;
 static int export_points;
 static int floating;
 static int extrude;
 static int trackdata;
+static int posn_track_points;
+static int max_position_points;
 
 static int indent_level;
 
@@ -93,6 +96,9 @@ arglist_t kml_args[] = {
        {"labels", &opt_labels,
         "Display labels on track and routepoints  (default = 1)",
         "1", ARGTYPE_BOOL, ARG_NOMINMAX },
+       {"max_position_points", &opt_max_position_points,
+        "Retain at most this number of position points  (0 = unlimited)",
+        "0", ARGTYPE_INT, ARG_NOMINMAX },
        ARG_TERMINATOR
 };
 
@@ -255,12 +261,15 @@ kml_wr_position_init(const char *fname)
        posnfilename = fname;;
        posnfilenametmp = xstrappend(xstrdup(fname), "-");
        realtime_positioning = 1;
+
        /*
         * 30% of our output file is whitespace.  Since parse time
         * matters in this mode, turn the pretty formatting off.
         */
        do_indentation = 0;
-       kml_wr_init(fname);
+       kml_wr_init(posnfilenametmp);
+
+       max_position_points = atoi(opt_max_position_points);
 }
 
 static void
@@ -794,7 +803,14 @@ kml_wr_position(waypoint *wpt)
                track_add_head(trk_head);
        }
 
+       if (max_position_points && (posn_track_points >= max_position_points)) {
+               waypoint *tonuke = QUEUE_FIRST(&trk_head->waypoint_list);
+               dequeue(&tonuke->Q);
+               waypt_free(tonuke);
+       }
+
        track_add_wpt(trk_head, t);
+       posn_track_points++;
 
        waypt_add(wpt);
        kml_write();