--- /dev/null
+/*
+ Copyright (C) 2008 Björn Augustsson, oggust@gmail.com
+ Copyright (C) 2008 Olaf Klein, o.b.klein@gpsbabel.org
+ Copyright (C) 2005 Robert Lipe, robertlipe@usa.net
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111 USA
+
+ */
+
+#include "defs.h"
+#include <ctype.h>
+
+#define MYNAME "humminbird"
+
+#define EAST_SCALE 20038297.0 /* this is i1924_equ_axis*M_PI */
+#define i1924_equ_axis 6378388.0
+#define i1924_polar_axis 6356911.946
+
+static
+arglist_t humminbird_args[] = {
+// {"foo", &fooopt, "The text of the foo option in help",
+// "default", ARGYTPE_STRING, ARG_NOMINMAX} ,
+ ARG_TERMINATOR
+};
+
+/* The hwr data format is records-based, and the records are 36 bytes long. */
+
+typedef struct humminbird_waypt_s {
+ gbuint32 signature; /* Just for error checking(?) */
+ gbuint16 num; /* Always ascending in the file. */
+ gbuint16 zero; /* Always seems to be zero. */
+ gbuint8 status; /* Always seems to be 1 */
+ gbuint8 icon; /* See below */
+ gbuint16 depth; /* Water depth. These are fishfinders. In centimeters */
+ gbuint32 time; /* This is a time_t. In UTC */
+ gbint32 east;
+ gbint32 north;
+ char name[12];
+} humminbird_waypt_t;
+
+# if 0
+static const char* humminbird_icons[] = {
+ "Normal", /* 0 */
+ "House", /* 1 */
+ "Red cross", /* 2 */
+ "Fish", /* 3 */
+ "Duck", /* 4 */
+ "Anchor", /* 5 */
+ "Buoy", /* 6 */
+ "Airport", /* 7 */
+ "Camping", /* 8 */
+ "Danger", /* 9 */
+ "Petrol", /* 10 */
+ "Rock", /* 11 */
+ "Weed", /* 12 */
+ "Wreck", /* 13 */
+ "Phone", /* 14 */
+ "Coffee", /* 15 */
+ "Beer", /* 16 */
+ "Mooring", /* 17 */
+ "Pier", /* 18 */
+ "Slip", /* 19 */
+ "Ramp", /* 20 */
+ "Circle", /* 21 */
+ "Diamond", /* 22 */
+ "Flag", /* 23 */
+ "Pattern", /* 24 */
+ "Shower", /* 25 */
+ "Water tap", /* 26 */
+ "Tree", /* 27 */
+ "Recording", /* 28 */
+ "Snapshot" /* 29 */
+};
+#endif
+
+static gbfile* fin;
+
+# if 0
+/* Takes a latitude in degrees,
+ * returns a latitude in degrees. */
+static double
+geodetic_to_geocentric_hwr(const double gd_lat) {
+ const double cos_ae = 0.9966349016452;
+ const double cos2_ae = cos_ae * cos_ae;
+
+ const double gdr = gd_lat *M_PI / 180.0;
+
+ return atan(cos2_ae * tan(gdr)) * 180.0/M_PI;
+}
+#endif
+
+/* Takes a latitude in degrees,
+ * returns a latitude in degrees. */
+static double
+geocentric_to_geodetic_hwr(const double gc_lat) {
+// const double cos_ae = i1924_polar_axis/i1924_equ_axis;
+ const double cos_ae = 0.9966349016452;
+
+ const double cos2_ae = cos_ae * cos_ae;
+
+ const double gcr = gc_lat *M_PI / 180.0;
+
+ return atan( tan(gcr)/cos2_ae ) * 180.0/M_PI;
+}
+
+/* Takes a projected "north" value, returns latitude in degrees. */
+static double
+gudermannian_i1924(const double x) {
+ const double norm_x = x/i1924_equ_axis;
+
+ return atan(sinh(norm_x)) * 180.0/M_PI;
+}
+
+#if 0
+/* Takes latitude in degrees, returns projected "north" value. */
+static double
+inverse_gudermannian_i1924(const double x) {
+ const double x_r = x/180.0 * M_PI;
+ const double guder = log(tan(M_PI/4.0 + x_r/2.0));
+
+ return guder * i1924_equ_axis;
+}
+#endif
+
+/*******************************************************************************
+* %%% global callbacks called by gpsbabel main process %%% *
+*******************************************************************************/
+
+static void
+humminbird_rd_init(const char *fname)
+{
+ fin = gbfopen(fname, "r", MYNAME);
+}
+
+static void
+humminbird_rd_deinit(void)
+{
+ gbfclose(fin);
+}
+
+static void
+humminbird_read(void)
+{
+
+ while(! gbfeof(fin)) {
+ humminbird_waypt_t w;
+ double guder;
+ int bytes;
+ waypoint *wpt;
+
+ bytes = gbfread(&w, 1, sizeof(humminbird_waypt_t), fin);
+ if(bytes == 0) break;
+
+ is_fatal((bytes != sizeof(humminbird_waypt_t)),
+ MYNAME ": Unexpected end of file (%d)!",
+ (int)sizeof(humminbird_waypt_t) - bytes);
+
+ /* Fix endianness - these are now BE */
+ w.signature = be_read32(&w.signature);
+ w.num = be_read16(&w.num);
+ w.zero = be_read16(&w.zero);
+ w.depth = be_read16(&w.depth);
+ w.time = be_read32(&w.time);
+ w.north = be_read32(&w.north);
+ w.east = be_read32(&w.east);
+
+ is_fatal(( w.signature != 0x02020024L ),
+ MYNAME ": Invalid record header (no or unknown humminbird file)!");
+
+ /* All right! Copy the data to the gpsbabel struct... */
+
+ wpt = waypt_new();
+
+ wpt->shortname = xstrndup(w.name, sizeof(w.name));
+ wpt->creation_time = w.time;
+
+ guder = gudermannian_i1924(w.north);
+ wpt->latitude = geocentric_to_geodetic_hwr(guder);
+ wpt->longitude = (double)w.east / EAST_SCALE * 180.0;
+
+ wpt->altitude = 0.0; /* It's from a fishfinder... */
+
+ if(w.depth != 0)
+ WAYPT_SET(wpt,depth,(double)w.depth / 100.0);
+
+ waypt_add(wpt);
+ }
+}
+
+#if 0
+static void
+humminbird_wr_init(const char *fname)
+{
+// fout = gbfopen(fname, "w", MYNAME);
+}
+
+static void
+humminbird_wr_deinit(void)
+{
+// gbfclose(fout);
+}
+
+static void
+humminbird_write(void)
+{
+}
+#endif
+
+/**************************************************************************/
+/* capabilities below means: we can only read waypoints */
+/**************************************************************************/
+
+ff_vecs_t humminbird_vecs = {
+ ff_type_file,
+ {
+ ff_cap_read, /* waypoints */
+ ff_cap_none, /* tracks */
+ ff_cap_none /* routes */
+ },
+ humminbird_rd_init,
+ NULL, /* humminbird_wr_init, */
+ humminbird_rd_deinit,
+ NULL, /* humminbird_wr_deinit, */
+ humminbird_read,
+ NULL, /* humminbird_write, */
+ NULL, /* humminbird_exit, */
+ humminbird_args,
+ CET_CHARSET_ASCII, 0
+};
+
+/**************************************************************************/
projects / gpsbabel.git / commitdiff