Allow deselection of certain sentences on write.

diff --git a/gpsbabel/nmea.c b/gpsbabel/nmea.c
index bc57f24085c6a42c31ff6c825a597876f51588e5..11515d3df5fe1adb9587047681a1d6dd55b8626c 100644 (file)
--- a/gpsbabel/nmea.c
+++ b/gpsbabel/nmea.c
@@ -129,6 +129,20 @@ static waypoint * curr_waypt       =NULL;
 static const double kts2mps =0.51444444444444444; /* knots to m/s */
 static const double kmh2mps =0.27777777777777778; /* km/h to m/s  */ 
 
+static char *dogprmc = NULL;
+static char *nogpgga = NULL;
+static char *nogpvtg = NULL;
+static char *nogpgsa = NULL;
+
+arglist_t nmea_args[] = {
+       {"gprmc", &dogprmc, "Write GPRMC sentences", NULL, ARGTYPE_BOOL },
+       {"nogpgga", &nogpgga, "Don't write GPGGA sentences", NULL, ARGTYPE_BOOL },
+       {"nogpvtg", &nogpvtg, "Don't write GPVTG sentences", NULL, ARGTYPE_BOOL },
+       {"nogpgsa", &nogpgsa, "Don't write GPGSA sentences", NULL, ARGTYPE_BOOL },
+       {0, 0, 0, 0 }
+};
+
+
 /*
  * Slightly different than the Magellan checksum fn.
  */
@@ -593,21 +607,31 @@ nmea_trackpt_pr(const waypoint *wpt)
                fix='0';
        }
 
-       snprintf(obuf, sizeof(obuf), "GPGGA,%06d,%08.3f,%c,%09.3f,%c,%c,%02d,%.1f,%.3f,M,0.0,M,,",
-                       hms,
-                       fabs(lat), lat < 0 ? 'S' : 'N',
-                       fabs(lon), lon < 0 ? 'W' : 'E',
-                       fix,
-                       (wpt->sat>0)?(wpt->sat):(0),
-                       (wpt->hdop>0)?(wpt->hdop):(0.0),
-                       wpt->altitude == unknown_alt ? 0 : wpt->altitude);
-       cksum = nmea_cksum(obuf);
-       fprintf(file_out, "$%s*%02X\n", obuf, cksum);
-
-       if (    (wpt->course>=0) ||
-               (wpt->speed>0)     )
-       {
-
+       if (dogprmc) {
+               snprintf(obuf, sizeof(obuf), "GPRMC,%06d,%c,%08.3f,%c,%09.3f,%c,%.2f,%.2f,%06d,,",
+                               hms,
+                               fix=='0' ? 'V' : 'A',
+                               fabs(lat), lat < 0 ? 'S' : 'N',
+                               fabs(lon), lon < 0 ? 'W' : 'E',
+                               (wpt->speed>0)?(wpt->speed / kts2mps):(0),
+                               (wpt->course>=0)?(wpt->course):(0),
+                               tm->tm_mday*10000+(tm->tm_mon+1)*100+tm->tm_year);
+               cksum = nmea_cksum(obuf);
+               fprintf(file_out, "$%s*%02X\n", obuf, cksum);
+       }
+       if (!nogpgga) {
+               snprintf(obuf, sizeof(obuf), "GPGGA,%06d,%08.3f,%c,%09.3f,%c,%c,%02d,%.1f,%.3f,M,0.0,M,,",
+                               hms,
+                               fabs(lat), lat < 0 ? 'S' : 'N',
+                               fabs(lon), lon < 0 ? 'W' : 'E',
+                               fix,
+                               (wpt->sat>0)?(wpt->sat):(0),
+                               (wpt->hdop>0)?(wpt->hdop):(0.0),
+                               wpt->altitude == unknown_alt ? 0 : wpt->altitude);
+               cksum = nmea_cksum(obuf);
+               fprintf(file_out, "$%s*%02X\n", obuf, cksum);
+       }
+       if ((!nogpvtg) && ((wpt->course>=0) || (wpt->speed>0))) {
                snprintf(obuf,sizeof(obuf),"GPVTG,%.3f,T,0,M,%.3f,N,%.3f,K",
                        (wpt->course>=0)?(wpt->course):(0),     
                        (wpt->speed>0)?(wpt->speed / kts2mps):(0),
@@ -616,8 +640,8 @@ nmea_trackpt_pr(const waypoint *wpt)
                cksum = nmea_cksum(obuf);
                fprintf(file_out, "$%s*%02X\n", obuf, cksum);
        }
-               
-       if (wpt->fix!=fix_unknown) {
+                       
+       if ((!nogpgsa) && (wpt->fix!=fix_unknown)) {
 
                switch (wpt->fix) 
                {
@@ -640,7 +664,6 @@ nmea_trackpt_pr(const waypoint *wpt)
                cksum = nmea_cksum(obuf);
                fprintf(file_out, "$%s*%02X\n", obuf, cksum);
        }
-
 }
 
 static void
@@ -660,5 +683,5 @@ ff_vecs_t nmea_vecs = {
        nmea_read,
        nmea_write,
        NULL,
-       NULL
+       nmea_args
 };