/*
* viking -- GPS Data and Topo Analyzer, Explorer, and Manager
*
- * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
+ * Copyright (C) 2003-2007, Evan Battaglia <gtoevan@gmx.net>
+ * Copyright (C) 2007, Quy Tonthat <qtonthat@gmail.com>
+ * Copyright (C) 2008, Hein Ragas <viking@ragas.nl>
+ * Copyright (C) 2009, Tal B <tal.bav@gmail.com>
+ * Copyright (c) 2012, Rob Norris <rw_norris@hotmail.com>
+ *
+ * Some of the code adapted from GPSBabel 1.2.7
+ * http://gpsbabel.sf.net/
+ * Copyright (C) 2002, 2003, 2004, 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
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
-
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
#define _XOPEN_SOURCE /* glibc2 needs this */
+#include "gpx.h"
#include "viking.h"
#include <expat.h>
+#ifdef HAVE_STRING_H
#include <string.h>
-
-// see ~/evan/programs/gpsbabel-1.2.7/gpx.c
+#endif
+#include <glib.h>
+#ifdef HAVE_MATH_H
+#include <math.h>
+#endif
+#include <time.h>
typedef enum {
tt_unknown = 0,
tt_gpx,
tt_wpt,
+ tt_wpt_cmt,
tt_wpt_desc,
tt_wpt_name,
tt_wpt_ele,
+ tt_wpt_sym,
+ tt_wpt_time,
tt_wpt_link, /* New in GPX 1.1 */
tt_trk,
+ tt_trk_cmt,
tt_trk_desc,
tt_trk_name,
+ tt_rte,
+
tt_trk_trkseg,
tt_trk_trkseg_trkpt,
tt_trk_trkseg_trkpt_ele,
tt_trk_trkseg_trkpt_time,
+ /* extended */
+ tt_trk_trkseg_trkpt_course,
+ tt_trk_trkseg_trkpt_speed,
+ tt_trk_trkseg_trkpt_fix,
+ tt_trk_trkseg_trkpt_sat,
+
+ tt_trk_trkseg_trkpt_hdop,
+ tt_trk_trkseg_trkpt_vdop,
+ tt_trk_trkseg_trkpt_pdop,
+
+ tt_waypoint,
+ tt_waypoint_coord,
+ tt_waypoint_name,
} tag_type;
typedef struct tag_mapping {
const char *tag_name; /* xpath-ish tag name */
} tag_mapping;
+typedef struct {
+ GpxWritingOptions *options;
+ FILE *file;
+} GpxWritingContext;
+
/*
* xpath(ish) mappings between full tag paths and internal identifers.
* These appear in the order they appear in the GPX specification.
*/
tag_mapping tag_path_map[] = {
- { tt_gpx, "/gpx" },
{ tt_wpt, "/gpx/wpt" },
+
+ { tt_waypoint, "/loc/waypoint" },
+ { tt_waypoint_coord, "/loc/waypoint/coord" },
+ { tt_waypoint_name, "/loc/waypoint/name" },
+
{ tt_wpt_ele, "/gpx/wpt/ele" },
+ { tt_wpt_time, "/gpx/wpt/time" },
{ tt_wpt_name, "/gpx/wpt/name" },
+ { tt_wpt_cmt, "/gpx/wpt/cmt" },
{ tt_wpt_desc, "/gpx/wpt/desc" },
+ { tt_wpt_sym, "/gpx/wpt/sym" },
+ { tt_wpt_sym, "/loc/waypoint/type" },
{ tt_wpt_link, "/gpx/wpt/link" }, /* GPX 1.1 */
{ tt_trk, "/gpx/trk" },
{ tt_trk_name, "/gpx/trk/name" },
+ { tt_trk_cmt, "/gpx/trk/cmt" },
{ tt_trk_desc, "/gpx/trk/desc" },
{ tt_trk_trkseg, "/gpx/trk/trkseg" },
-
{ tt_trk_trkseg_trkpt, "/gpx/trk/trkseg/trkpt" },
{ tt_trk_trkseg_trkpt_ele, "/gpx/trk/trkseg/trkpt/ele" },
{ tt_trk_trkseg_trkpt_time, "/gpx/trk/trkseg/trkpt/time" },
+ /* extended */
+ { tt_trk_trkseg_trkpt_course, "/gpx/trk/trkseg/trkpt/course" },
+ { tt_trk_trkseg_trkpt_speed, "/gpx/trk/trkseg/trkpt/speed" },
+ { tt_trk_trkseg_trkpt_fix, "/gpx/trk/trkseg/trkpt/fix" },
+ { tt_trk_trkseg_trkpt_sat, "/gpx/trk/trkseg/trkpt/sat" },
+
+ { tt_trk_trkseg_trkpt_hdop, "/gpx/trk/trkseg/trkpt/hdop" },
+ { tt_trk_trkseg_trkpt_vdop, "/gpx/trk/trkseg/trkpt/vdop" },
+ { tt_trk_trkseg_trkpt_pdop, "/gpx/trk/trkseg/trkpt/pdop" },
+
+ { tt_rte, "/gpx/rte" },
+ // NB Route reuses track point feature tags
+ { tt_trk_name, "/gpx/rte/name" },
+ { tt_trk_cmt, "/gpx/rte/cmt" },
+ { tt_trk_desc, "/gpx/rte/desc" },
+ { tt_trk_trkseg_trkpt, "/gpx/rte/rtept" },
+ { tt_trk_trkseg_trkpt_ele, "/gpx/rte/rtept/ele" },
{0}
};
gboolean f_tr_newseg;
guint unnamed_waypoints = 0;
guint unnamed_tracks = 0;
-
+guint unnamed_routes = 0;
static const char *get_attr ( const char **attr, const char *key )
{
static gboolean set_c_ll ( const char **attr )
{
if ( (c_slat = get_attr ( attr, "lat" )) && (c_slon = get_attr ( attr, "lon" )) ) {
- c_ll.lat = strtod(c_slat, NULL);
- c_ll.lon = strtod(c_slon, NULL);
+ c_ll.lat = g_ascii_strtod(c_slat, NULL);
+ c_ll.lon = g_ascii_strtod(c_slon, NULL);
return TRUE;
}
return FALSE;
static void gpx_start(VikTrwLayer *vtl, const char *el, const char **attr)
{
+ static const gchar *tmp;
+
g_string_append_c ( xpath, '/' );
g_string_append ( xpath, el );
current_tag = get_tag ( xpath->str );
case tt_wpt:
if ( set_c_ll( attr ) ) {
c_wp = vik_waypoint_new ();
- c_wp->altitude = VIK_DEFAULT_ALTITUDE;
- if ( ! get_attr ( attr, "hidden" ) )
- c_wp->visible = TRUE;
+ c_wp->visible = TRUE;
+ if ( get_attr ( attr, "hidden" ) )
+ c_wp->visible = FALSE;
vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
}
break;
case tt_trk:
+ case tt_rte:
c_tr = vik_track_new ();
- if ( ! get_attr ( attr, "hidden" ) )
- c_tr->visible = TRUE;
+ c_tr->is_route = (current_tag == tt_rte) ? TRUE : FALSE;
+ c_tr->visible = TRUE;
+ if ( get_attr ( attr, "hidden" ) )
+ c_tr->visible = FALSE;
break;
case tt_trk_trkseg:
case tt_trk_trkseg_trkpt:
if ( set_c_ll( attr ) ) {
c_tp = vik_trackpoint_new ();
- c_tp->altitude = VIK_DEFAULT_ALTITUDE;
vik_coord_load_from_latlon ( &(c_tp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
if ( f_tr_newseg ) {
c_tp->newsegment = TRUE;
case tt_trk_trkseg_trkpt_ele:
case tt_trk_trkseg_trkpt_time:
+ case tt_wpt_cmt:
case tt_wpt_desc:
case tt_wpt_name:
case tt_wpt_ele:
+ case tt_wpt_time:
case tt_wpt_link:
+ case tt_trk_cmt:
case tt_trk_desc:
case tt_trk_name:
g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer */
+ break;
+ case tt_waypoint:
+ c_wp = vik_waypoint_new ();
+ c_wp->visible = TRUE;
+ break;
+
+ case tt_waypoint_coord:
+ if ( set_c_ll( attr ) )
+ vik_coord_load_from_latlon ( &(c_wp->coord), vik_trw_layer_get_coord_mode ( vtl ), &c_ll );
+ break;
+
+ case tt_waypoint_name:
+ if ( ( tmp = get_attr(attr, "id") ) ) {
+ if ( c_wp_name )
+ g_free ( c_wp_name );
+ c_wp_name = g_strdup ( tmp );
+ }
+ g_string_erase ( c_cdata, 0, -1 ); /* clear the cdata buffer for description */
+ break;
+
default: break;
}
}
static void gpx_end(VikTrwLayer *vtl, const char *el)
{
- static struct tm tm;
+ static GTimeVal tp_time;
+ static GTimeVal wp_time;
+
g_string_truncate ( xpath, xpath->len - strlen(el) - 1 );
switch ( current_tag ) {
+ case tt_waypoint:
case tt_wpt:
if ( ! c_wp_name )
- c_wp_name = g_strdup_printf("VIKING_WP%d", unnamed_waypoints++);
- g_hash_table_insert ( vik_trw_layer_get_waypoints ( vtl ), c_wp_name, c_wp );
+ c_wp_name = g_strdup_printf("VIKING_WP%04d", unnamed_waypoints++);
+ vik_trw_layer_filein_add_waypoint ( vtl, c_wp_name, c_wp );
+ g_free ( c_wp_name );
c_wp = NULL;
c_wp_name = NULL;
break;
case tt_trk:
if ( ! c_tr_name )
- c_tr_name = g_strdup_printf("VIKING_TR%d", unnamed_waypoints++);
- g_hash_table_insert ( vik_trw_layer_get_tracks ( vtl ), c_tr_name, c_tr );
+ c_tr_name = g_strdup_printf("VIKING_TR%03d", unnamed_tracks++);
+ // Delibrate fall through
+ case tt_rte:
+ if ( ! c_tr_name )
+ c_tr_name = g_strdup_printf("VIKING_RT%03d", unnamed_routes++);
+ vik_trw_layer_filein_add_track ( vtl, c_tr_name, c_tr );
+ g_free ( c_tr_name );
c_tr = NULL;
c_tr_name = NULL;
break;
break;
case tt_wpt_ele:
- c_wp->altitude = strtod ( c_cdata->str, NULL );
+ c_wp->altitude = g_ascii_strtod ( c_cdata->str, NULL );
g_string_erase ( c_cdata, 0, -1 );
break;
case tt_trk_trkseg_trkpt_ele:
- c_tp->altitude = strtod ( c_cdata->str, NULL );
+ c_tp->altitude = g_ascii_strtod ( c_cdata->str, NULL );
g_string_erase ( c_cdata, 0, -1 );
break;
+ case tt_waypoint_name: /* .loc name is really description. */
case tt_wpt_desc:
+ vik_waypoint_set_description ( c_wp, c_cdata->str );
+ g_string_erase ( c_cdata, 0, -1 );
+ break;
+
+ case tt_wpt_cmt:
vik_waypoint_set_comment ( c_wp, c_cdata->str );
g_string_erase ( c_cdata, 0, -1 );
break;
g_string_erase ( c_cdata, 0, -1 );
break;
+ case tt_wpt_sym: {
+ vik_waypoint_set_symbol ( c_wp, c_cdata->str );
+ g_string_erase ( c_cdata, 0, -1 );
+ break;
+ }
+
case tt_trk_desc:
+ vik_track_set_description ( c_tr, c_cdata->str );
+ g_string_erase ( c_cdata, 0, -1 );
+ break;
+
+ case tt_trk_cmt:
vik_track_set_comment ( c_tr, c_cdata->str );
g_string_erase ( c_cdata, 0, -1 );
break;
+ case tt_wpt_time:
+ if ( g_time_val_from_iso8601(c_cdata->str, &wp_time) ) {
+ c_wp->timestamp = wp_time.tv_sec;
+ c_wp->has_timestamp = TRUE;
+ }
+ g_string_erase ( c_cdata, 0, -1 );
+ break;
+
case tt_trk_trkseg_trkpt_time:
- if ( strptime(c_cdata->str, "%Y-%m-%dT%H:%M:%SZ", &tm) != c_cdata->str ) { /* it read at least one char */
- c_tp->timestamp = mktime(&tm);
+ if ( g_time_val_from_iso8601(c_cdata->str, &tp_time) ) {
+ c_tp->timestamp = tp_time.tv_sec;
c_tp->has_timestamp = TRUE;
}
g_string_erase ( c_cdata, 0, -1 );
+ break;
+
+ case tt_trk_trkseg_trkpt_course:
+ c_tp->course = g_ascii_strtod ( c_cdata->str, NULL );
+ g_string_erase ( c_cdata, 0, -1 );
+ break;
+
+ case tt_trk_trkseg_trkpt_speed:
+ c_tp->speed = g_ascii_strtod ( c_cdata->str, NULL );
+ g_string_erase ( c_cdata, 0, -1 );
+ break;
+
+ case tt_trk_trkseg_trkpt_fix:
+ if (!strcmp("2d", c_cdata->str))
+ c_tp->fix_mode = VIK_GPS_MODE_2D;
+ else if (!strcmp("3d", c_cdata->str))
+ c_tp->fix_mode = VIK_GPS_MODE_3D;
+ else /* TODO: more fix modes here */
+ c_tp->fix_mode = VIK_GPS_MODE_NOT_SEEN;
+ g_string_erase ( c_cdata, 0, -1 );
+ break;
+
+ case tt_trk_trkseg_trkpt_sat:
+ c_tp->nsats = atoi ( c_cdata->str );
+ g_string_erase ( c_cdata, 0, -1 );
+ break;
+
+ case tt_trk_trkseg_trkpt_hdop:
+ c_tp->hdop = g_strtod ( c_cdata->str, NULL );
+ g_string_erase ( c_cdata, 0, -1 );
+ break;
+
+ case tt_trk_trkseg_trkpt_vdop:
+ c_tp->vdop = g_strtod ( c_cdata->str, NULL );
+ g_string_erase ( c_cdata, 0, -1 );
+ break;
+
+ case tt_trk_trkseg_trkpt_pdop:
+ c_tp->pdop = g_strtod ( c_cdata->str, NULL );
+ g_string_erase ( c_cdata, 0, -1 );
+ break;
default: break;
}
case tt_trk_name:
case tt_wpt_ele:
case tt_trk_trkseg_trkpt_ele:
+ case tt_wpt_cmt:
case tt_wpt_desc:
+ case tt_wpt_sym:
case tt_wpt_link:
+ case tt_trk_cmt:
case tt_trk_desc:
case tt_trk_trkseg_trkpt_time:
+ case tt_wpt_time:
+ case tt_trk_trkseg_trkpt_course:
+ case tt_trk_trkseg_trkpt_speed:
+ case tt_trk_trkseg_trkpt_fix:
+ case tt_trk_trkseg_trkpt_sat:
+ case tt_trk_trkseg_trkpt_hdop:
+ case tt_trk_trkseg_trkpt_vdop:
+ case tt_trk_trkseg_trkpt_pdop:
+ case tt_waypoint_name: /* .loc name is really description. */
g_string_append_len ( c_cdata, s, len );
break;
// make like a "stack" of tag names
// like gpspoint's separated like /gpx/wpt/whatever
-void a_gpx_read_file( VikTrwLayer *vtl, FILE *f ) {
+gboolean a_gpx_read_file( VikTrwLayer *vtl, FILE *f ) {
XML_Parser parser = XML_ParserCreate(NULL);
int done=0, len;
+ enum XML_Status status = XML_STATUS_ERROR;
XML_SetElementHandler(parser, (XML_StartElementHandler) gpx_start, (XML_EndElementHandler) gpx_end);
XML_SetUserData(parser, vtl); /* in the future we could remove all global variables */
gchar buf[4096];
- //g_assert ( f != NULL && vtl != NULL );
+ g_assert ( f != NULL && vtl != NULL );
xpath = g_string_new ( "" );
c_cdata = g_string_new ( "" );
- unnamed_waypoints = 0;
- unnamed_tracks = 0;
+ unnamed_waypoints = 1;
+ unnamed_tracks = 1;
+ unnamed_routes = 1;
while (!done) {
len = fread(buf, 1, sizeof(buf)-7, f);
done = feof(f) || !len;
- XML_Parse(parser, buf, len, done);
+ status = XML_Parse(parser, buf, len, done);
}
+ XML_ParserFree (parser);
g_string_free ( xpath, TRUE );
g_string_free ( c_cdata, TRUE );
+
+ return status != XML_STATUS_ERROR;
+}
+
+/**** entitize from GPSBabel ****/
+typedef struct {
+ const char * text;
+ const char * entity;
+ int not_html;
+} entity_types;
+
+static
+entity_types stdentities[] = {
+ { "&", "&", 0 },
+ { "'", "'", 1 },
+ { "<", "<", 0 },
+ { ">", ">", 0 },
+ { "\"", """, 0 },
+ { NULL, NULL, 0 }
+};
+
+void utf8_to_int( const char *cp, int *bytes, int *value )
+{
+ if ( (*cp & 0xe0) == 0xc0 ) {
+ if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
+ *bytes = 2;
+ *value = ((*cp & 0x1f) << 6) |
+ (*(cp+1) & 0x3f);
+ }
+ else if ( (*cp & 0xf0) == 0xe0 ) {
+ if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
+ if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
+ *bytes = 3;
+ *value = ((*cp & 0x0f) << 12) |
+ ((*(cp+1) & 0x3f) << 6) |
+ (*(cp+2) & 0x3f);
+ }
+ else if ( (*cp & 0xf8) == 0xf0 ) {
+ if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
+ if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
+ if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
+ *bytes = 4;
+ *value = ((*cp & 0x07) << 18) |
+ ((*(cp+1) & 0x3f) << 12) |
+ ((*(cp+2) & 0x3f) << 6) |
+ (*(cp+3) & 0x3f);
+ }
+ else if ( (*cp & 0xfc) == 0xf8 ) {
+ if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
+ if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
+ if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
+ if ( (*(cp+4) & 0xc0) != 0x80 ) goto dodefault;
+ *bytes = 5;
+ *value = ((*cp & 0x03) << 24) |
+ ((*(cp+1) & 0x3f) << 18) |
+ ((*(cp+2) & 0x3f) << 12) |
+ ((*(cp+3) & 0x3f) << 6) |
+ (*(cp+4) & 0x3f);
+ }
+ else if ( (*cp & 0xfe) == 0xfc ) {
+ if ( (*(cp+1) & 0xc0) != 0x80 ) goto dodefault;
+ if ( (*(cp+2) & 0xc0) != 0x80 ) goto dodefault;
+ if ( (*(cp+3) & 0xc0) != 0x80 ) goto dodefault;
+ if ( (*(cp+4) & 0xc0) != 0x80 ) goto dodefault;
+ if ( (*(cp+5) & 0xc0) != 0x80 ) goto dodefault;
+ *bytes = 6;
+ *value = ((*cp & 0x01) << 30) |
+ ((*(cp+1) & 0x3f) << 24) |
+ ((*(cp+2) & 0x3f) << 18) |
+ ((*(cp+3) & 0x3f) << 12) |
+ ((*(cp+4) & 0x3f) << 6) |
+ (*(cp+5) & 0x3f);
+ }
+ else {
+dodefault:
+ *bytes = 1;
+ *value = (unsigned char)*cp;
+ }
+}
+
+static
+char *
+entitize(const char * str)
+{
+ int elen, ecount, nsecount;
+ entity_types *ep;
+ const char * cp;
+ char * p, * tmp, * xstr;
+
+ char tmpsub[20];
+ int bytes = 0;
+ int value = 0;
+ ep = stdentities;
+ elen = ecount = nsecount = 0;
+
+ /* figure # of entity replacements and additional size. */
+ while (ep->text) {
+ cp = str;
+ while ((cp = strstr(cp, ep->text)) != NULL) {
+ elen += strlen(ep->entity) - strlen(ep->text);
+ ecount++;
+ cp += strlen(ep->text);
+ }
+ ep++;
+ }
+
+ /* figure the same for other than standard entities (i.e. anything
+ * that isn't in the range U+0000 to U+007F */
+ for ( cp = str; *cp; cp++ ) {
+ if ( *cp & 0x80 ) {
+
+ utf8_to_int( cp, &bytes, &value );
+ cp += bytes-1;
+ elen += sprintf( tmpsub, "&#x%x;", value ) - bytes;
+ nsecount++;
+ }
+ }
+
+ /* enough space for the whole string plus entity replacements, if any */
+ tmp = g_malloc((strlen(str) + elen + 1));
+ strcpy(tmp, str);
+
+ /* no entity replacements */
+ if (ecount == 0 && nsecount == 0)
+ return (tmp);
+
+ if ( ecount != 0 ) {
+ for (ep = stdentities; ep->text; ep++) {
+ p = tmp;
+ while ((p = strstr(p, ep->text)) != NULL) {
+ elen = strlen(ep->entity);
+
+ xstr = g_strdup(p + strlen(ep->text));
+
+ strcpy(p, ep->entity);
+ strcpy(p + elen, xstr);
+
+ g_free(xstr);
+
+ p += elen;
+ }
+ }
+ }
+
+ if ( nsecount != 0 ) {
+ p = tmp;
+ while (*p) {
+ if ( *p & 0x80 ) {
+ utf8_to_int( p, &bytes, &value );
+ if ( p[bytes] ) {
+ xstr = g_strdup( p + bytes );
+ }
+ else {
+ xstr = NULL;
+ }
+ sprintf( p, "&#x%x;", value );
+ p = p+strlen(p);
+ if ( xstr ) {
+ strcpy( p, xstr );
+ g_free(xstr);
+ }
+ }
+ else {
+ p++;
+ }
+ }
+ }
+ return (tmp);
+}
+/**** end GPSBabel code ****/
+
+/* export GPX */
+
+static void gpx_write_waypoint ( VikWaypoint *wp, GpxWritingContext *context )
+{
+ // Don't write invisible waypoints when specified
+ if (context->options && !context->options->hidden && !wp->visible)
+ return;
+
+ FILE *f = context->file;
+ static struct LatLon ll;
+ gchar *s_lat,*s_lon;
+ gchar *tmp;
+ vik_coord_to_latlon ( &(wp->coord), &ll );
+ s_lat = a_coords_dtostr( ll.lat );
+ s_lon = a_coords_dtostr( ll.lon );
+ // NB 'hidden' is not part of any GPX standard - this appears to be a made up Viking 'extension'
+ // luckily most other GPX processing software ignores things they don't understand
+ fprintf ( f, "<wpt lat=\"%s\" lon=\"%s\"%s>\n",
+ s_lat, s_lon, wp->visible ? "" : " hidden=\"hidden\"" );
+ g_free ( s_lat );
+ g_free ( s_lon );
+
+ // Sanity clause
+ if ( wp->name )
+ tmp = entitize ( wp->name );
+ else
+ tmp = g_strdup ("waypoint");
+
+ fprintf ( f, " <name>%s</name>\n", tmp );
+ g_free ( tmp);
+
+ if ( wp->altitude != VIK_DEFAULT_ALTITUDE )
+ {
+ tmp = a_coords_dtostr ( wp->altitude );
+ fprintf ( f, " <ele>%s</ele>\n", tmp );
+ g_free ( tmp );
+ }
+
+ if ( wp->has_timestamp ) {
+ GTimeVal timestamp;
+ timestamp.tv_sec = wp->timestamp;
+ timestamp.tv_usec = 0;
+
+ gchar *time_iso8601 = g_time_val_to_iso8601 ( ×tamp );
+ if ( time_iso8601 != NULL )
+ fprintf ( f, " <time>%s</time>\n", time_iso8601 );
+ g_free ( time_iso8601 );
+ }
+
+ if ( wp->comment )
+ {
+ tmp = entitize(wp->comment);
+ fprintf ( f, " <cmt>%s</cmt>\n", tmp );
+ g_free ( tmp );
+ }
+ if ( wp->description )
+ {
+ tmp = entitize(wp->description);
+ fprintf ( f, " <desc>%s</desc>\n", tmp );
+ g_free ( tmp );
+ }
+ if ( wp->image )
+ {
+ tmp = entitize(wp->image);
+ fprintf ( f, " <link>%s</link>\n", tmp );
+ g_free ( tmp );
+ }
+ if ( wp->symbol )
+ {
+ tmp = entitize(wp->symbol);
+ if ( a_vik_gpx_export_wpt_sym_name ( ) ) {
+ // Lowercase the symbol name
+ gchar *tmp2 = g_utf8_strdown ( tmp, -1 );
+ fprintf ( f, " <sym>%s</sym>\n", tmp2 );
+ g_free ( tmp2 );
+ }
+ else
+ fprintf ( f, " <sym>%s</sym>\n", tmp);
+ g_free ( tmp );
+ }
+
+ fprintf ( f, "</wpt>\n" );
+}
+
+static void gpx_write_trackpoint ( VikTrackpoint *tp, GpxWritingContext *context )
+{
+ FILE *f = context->file;
+ static struct LatLon ll;
+ gchar *s_lat,*s_lon, *s_alt, *s_dop;
+ gchar *time_iso8601;
+ vik_coord_to_latlon ( &(tp->coord), &ll );
+
+ // No such thing as a rteseg! So make sure we don't put them in
+ if ( context->options && !context->options->is_route && tp->newsegment )
+ fprintf ( f, " </trkseg>\n <trkseg>\n" );
+
+ s_lat = a_coords_dtostr( ll.lat );
+ s_lon = a_coords_dtostr( ll.lon );
+ fprintf ( f, " <%spt lat=\"%s\" lon=\"%s\">\n", (context->options && context->options->is_route) ? "rte" : "trk", s_lat, s_lon );
+ g_free ( s_lat ); s_lat = NULL;
+ g_free ( s_lon ); s_lon = NULL;
+
+ s_alt = NULL;
+ if ( tp->altitude != VIK_DEFAULT_ALTITUDE )
+ {
+ s_alt = a_coords_dtostr ( tp->altitude );
+ }
+ else if ( context->options != NULL && context->options->force_ele )
+ {
+ s_alt = a_coords_dtostr ( 0 );
+ }
+ if (s_alt != NULL)
+ fprintf ( f, " <ele>%s</ele>\n", s_alt );
+ g_free ( s_alt ); s_alt = NULL;
+
+ time_iso8601 = NULL;
+ if ( tp->has_timestamp ) {
+ GTimeVal timestamp;
+ timestamp.tv_sec = tp->timestamp;
+ timestamp.tv_usec = 0;
+
+ time_iso8601 = g_time_val_to_iso8601 ( ×tamp );
+ }
+ else if ( context->options != NULL && context->options->force_time )
+ {
+ GTimeVal current;
+ g_get_current_time ( ¤t );
+
+ time_iso8601 = g_time_val_to_iso8601 ( ¤t );
+ }
+ if ( time_iso8601 != NULL )
+ fprintf ( f, " <time>%s</time>\n", time_iso8601 );
+ g_free(time_iso8601);
+ time_iso8601 = NULL;
+
+ if (!isnan(tp->course)) {
+ gchar *s_course = a_coords_dtostr(tp->course);
+ fprintf ( f, " <course>%s</course>\n", s_course );
+ g_free(s_course);
+ }
+ if (!isnan(tp->speed)) {
+ gchar *s_speed = a_coords_dtostr(tp->speed);
+ fprintf ( f, " <speed>%s</speed>\n", s_speed );
+ g_free(s_speed);
+ }
+ if (tp->fix_mode == VIK_GPS_MODE_2D)
+ fprintf ( f, " <fix>2d</fix>\n");
+ if (tp->fix_mode == VIK_GPS_MODE_3D)
+ fprintf ( f, " <fix>3d</fix>\n");
+ if (tp->nsats > 0)
+ fprintf ( f, " <sat>%d</sat>\n", tp->nsats );
+
+ s_dop = NULL;
+ if ( tp->hdop != VIK_DEFAULT_DOP )
+ {
+ s_dop = a_coords_dtostr ( tp->hdop );
+ }
+ if (s_dop != NULL)
+ fprintf ( f, " <hdop>%s</hdop>\n", s_dop );
+ g_free ( s_dop ); s_dop = NULL;
+
+ if ( tp->vdop != VIK_DEFAULT_DOP )
+ {
+ s_dop = a_coords_dtostr ( tp->vdop );
+ }
+ if (s_dop != NULL)
+ fprintf ( f, " <vdop>%s</vdop>\n", s_dop );
+ g_free ( s_dop ); s_dop = NULL;
+
+ if ( tp->pdop != VIK_DEFAULT_DOP )
+ {
+ s_dop = a_coords_dtostr ( tp->pdop );
+ }
+ if (s_dop != NULL)
+ fprintf ( f, " <pdop>%s</pdop>\n", s_dop );
+ g_free ( s_dop ); s_dop = NULL;
+
+ fprintf ( f, " </%spt>\n", (context->options && context->options->is_route) ? "rte" : "trk" );
+}
+
+
+static void gpx_write_track ( VikTrack *t, GpxWritingContext *context )
+{
+ // Don't write invisible tracks when specified
+ if (context->options && !context->options->hidden && !t->visible)
+ return;
+
+ FILE *f = context->file;
+ gchar *tmp;
+ gboolean first_tp_is_newsegment = FALSE; /* must temporarily make it not so, but we want to restore state. not that it matters. */
+
+ // Sanity clause
+ if ( t->name )
+ tmp = entitize ( t->name );
+ else
+ tmp = g_strdup ("track");
+
+ // NB 'hidden' is not part of any GPX standard - this appears to be a made up Viking 'extension'
+ // luckily most other GPX processing software ignores things they don't understand
+ fprintf ( f, "<%s%s>\n <name>%s</name>\n",
+ t->is_route ? "rte" : "trk",
+ t->visible ? "" : " hidden=\"hidden\"",
+ tmp );
+ g_free ( tmp );
+
+ if ( t->comment )
+ {
+ tmp = entitize ( t->comment );
+ fprintf ( f, " <cmt>%s</cmt>\n", tmp );
+ g_free ( tmp );
+ }
+
+ if ( t->description )
+ {
+ tmp = entitize ( t->description );
+ fprintf ( f, " <desc>%s</desc>\n", tmp );
+ g_free ( tmp );
+ }
+
+ /* No such thing as a rteseg! */
+ if ( !t->is_route )
+ fprintf ( f, " <trkseg>\n" );
+
+ if ( t->trackpoints && t->trackpoints->data ) {
+ first_tp_is_newsegment = VIK_TRACKPOINT(t->trackpoints->data)->newsegment;
+ VIK_TRACKPOINT(t->trackpoints->data)->newsegment = FALSE; /* so we won't write </trkseg><trkseg> already */
+ g_list_foreach ( t->trackpoints, (GFunc) gpx_write_trackpoint, context );
+ VIK_TRACKPOINT(t->trackpoints->data)->newsegment = first_tp_is_newsegment; /* restore state */
+ }
+
+ /* NB apparently no such thing as a rteseg! */
+ if (!t->is_route)
+ fprintf ( f, " </trkseg>\n");
+
+ fprintf ( f, "</%s>\n", t->is_route ? "rte" : "trk" );
+}
+
+static void gpx_write_header( FILE *f )
+{
+ fprintf(f, "<?xml version=\"1.0\"?>\n"
+ "<gpx version=\"1.0\" creator=\"Viking -- http://viking.sf.net/\"\n"
+ "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
+ "xmlns=\"http://www.topografix.com/GPX/1/0\"\n"
+ "xsi:schemaLocation=\"http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd\">\n");
+}
+
+static void gpx_write_footer( FILE *f )
+{
+ fprintf(f, "</gpx>\n");
+}
+
+static int gpx_waypoint_compare(const void *x, const void *y)
+{
+ VikWaypoint *a = (VikWaypoint *)x;
+ VikWaypoint *b = (VikWaypoint *)y;
+ return strcmp(a->name,b->name);
+}
+
+static int gpx_track_compare_name(const void *x, const void *y)
+{
+ VikTrack *a = (VikTrack *)x;
+ VikTrack *b = (VikTrack *)y;
+ return strcmp(a->name,b->name);
+}
+
+/* Function to compare two tracks by their first timestamp */
+static int gpx_track_compare_timestamp (const void *x, const void *y)
+{
+ VikTrack *a = (VikTrack *)x;
+ VikTrack *b = (VikTrack *)y;
+
+ VikTrackpoint *tpa = NULL;
+ VikTrackpoint *tpb = NULL;
+
+ if ( a->trackpoints )
+ tpa = VIK_TRACKPOINT(g_list_first(a->trackpoints)->data);
+
+ if ( b->trackpoints )
+ tpb = VIK_TRACKPOINT(g_list_first(b->trackpoints)->data);
+
+ if ( tpa && tpb ) {
+ if ( tpa->timestamp < tpb->timestamp )
+ return -1;
+ if ( tpa->timestamp > tpb->timestamp )
+ return 1;
+ }
+
+ if ( tpa && !tpb )
+ return 1;
+
+ if ( !tpa && tpb )
+ return -1;
+
+ return 0;
+}
+
+void a_gpx_write_file ( VikTrwLayer *vtl, FILE *f, GpxWritingOptions *options )
+{
+ GpxWritingContext context = { options, f };
+
+ gpx_write_header ( f );
+
+ // gather waypoints in a list, then sort
+ // g_hash_table_get_values: glib 2.14+
+ GList *gl = g_hash_table_get_values ( vik_trw_layer_get_waypoints ( vtl ) );
+ gl = g_list_sort ( gl, gpx_waypoint_compare );
+
+ GList *iter;
+ for (iter = g_list_first (gl); iter != NULL; iter = g_list_next (iter)) {
+ gpx_write_waypoint ( (VikWaypoint*)iter->data, &context );
+ }
+
+ g_list_free ( gl );
+
+ //gl = g_hash_table_get_values ( vik_trw_layer_get_tracks ( vtl ) );
+ // Forming the list manually seems to produce one that is more likely to be nearer to the creation order
+ gl = NULL;
+ gpointer key, value;
+ GHashTableIter ght_iter;
+ g_hash_table_iter_init ( &ght_iter, vik_trw_layer_get_tracks ( vtl ) );
+ while ( g_hash_table_iter_next (&ght_iter, &key, &value) ) {
+ gl = g_list_prepend ( gl ,value );
+ }
+ gl = g_list_reverse ( gl );
+
+ // Sort method determined by preference
+ if ( a_vik_get_gpx_export_trk_sort() == VIK_GPX_EXPORT_TRK_SORT_TIME )
+ gl = g_list_sort ( gl, gpx_track_compare_timestamp );
+ else if ( a_vik_get_gpx_export_trk_sort() == VIK_GPX_EXPORT_TRK_SORT_ALPHA )
+ gl = g_list_sort ( gl, gpx_track_compare_name );
+
+ // Routes sorted by name
+ GList *glrte = g_hash_table_get_values ( vik_trw_layer_get_routes ( vtl ) );
+ glrte = g_list_sort ( glrte, gpx_track_compare_name );
+
+ // g_list_concat doesn't copy memory properly
+ // so process each list separately
+
+ GpxWritingContext context_tmp = context;
+ GpxWritingOptions opt_tmp = { FALSE, FALSE, FALSE };
+ // Force trackpoints on tracks
+ if ( !context.options )
+ context_tmp.options = &opt_tmp;
+ context_tmp.options->is_route = FALSE;
+
+ // Loop around each list and write each one
+ for (iter = g_list_first (gl); iter != NULL; iter = g_list_next (iter)) {
+ gpx_write_track ( (VikTrack*)iter->data, &context_tmp );
+ }
+
+ // Routes (to get routepoints)
+ context_tmp.options->is_route = TRUE;
+ for (iter = g_list_first (glrte); iter != NULL; iter = g_list_next (iter)) {
+ gpx_write_track ( (VikTrack*)iter->data, &context_tmp );
+ }
+
+ g_list_free ( gl );
+ g_list_free ( glrte );
+
+ gpx_write_footer ( f );
+}
+
+void a_gpx_write_track_file ( VikTrack *trk, FILE *f, GpxWritingOptions *options )
+{
+ GpxWritingContext context = {options, f};
+ gpx_write_header ( f );
+ gpx_write_track ( trk, &context );
+ gpx_write_footer ( f );
}