/*
* viking -- GPS Data and Topo Analyzer, Explorer, and Manager
*
* Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.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 02111-1307 USA
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_MATH_H
#include <math.h>
#endif
#include "viking.h"
#include <ctype.h>
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <stdlib.h>
/* strtod */
static void a_gpspoint_write_track ( const gchar *name, VikTrack *t, FILE *f );
static void a_gpspoint_write_trackpoint ( VikTrackpoint *tp, FILE *f );
static void a_gpspoint_write_waypoint ( const gchar *name, VikWaypoint *wp, FILE *f );
/* outline for file gpspoint.c
reading file:
take a line.
get first tag, if not type, skip it.
if type, record type. if waypoint list, etc move on. if track, make a new track, make it current track, add it, etc.
if waypoint, read on and store to the waypoint.
if trackpoint, make trackpoint, store to current track (error / skip if none)
*/
/* Thanks to etrex-cache's gpsbabel's gpspoint.c for starting me off! */
static char line_buffer[2048];
#define GPSPOINT_TYPE_NONE 0
#define GPSPOINT_TYPE_WAYPOINT 1
#define GPSPOINT_TYPE_TRACKPOINT 2
/* #define GPSPOINT_TYPE_ROUTEPOINT 3 */
#define GPSPOINT_TYPE_TRACK 4
/* #define GPSPOINT_TYPE_ROUTE 5 */
static VikTrack *current_track; /* pointer to pointer to first GList */
static gint line_type = GPSPOINT_TYPE_NONE;
static struct LatLon line_latlon;
static gchar *line_name;
static gchar *line_comment;
static gchar *line_image;
static gchar *line_symbol;
static gboolean line_newsegment = FALSE;
static gboolean line_has_timestamp = FALSE;
static time_t line_timestamp = 0;
static gdouble line_altitude = VIK_DEFAULT_ALTITUDE;
static gboolean line_visible = TRUE;
static gboolean line_extended = FALSE;
static gdouble line_speed = NAN;
static gdouble line_course = NAN;
static gint line_sat = 0;
static gint line_fix = 0;
/* other possible properties go here */
static void gpspoint_process_tag ( const gchar *tag, gint len );
static void gpspoint_process_key_and_value ( const gchar *key, gint key_len, const gchar *value, gint value_len );
static gchar *slashdup(const gchar *str)
{
guint16 len = strlen(str);
guint16 need_bs_count, i, j;
gchar *rv;
for ( i = 0, need_bs_count = 0; i < len; i++ )
if ( str[i] == '\\' || str[i] == '"' )
need_bs_count++;
rv = g_malloc ( (len+need_bs_count+1) * sizeof(gchar) );
for ( i = 0, j = 0; i < len; i++, j++ )
{
if ( str[i] == '\\' || str[i] == '"' )
rv[j++] = '\\';
rv[j] = str[i];
}
rv[j] = '\0';
return rv;
}
static gchar *deslashndup ( const gchar *str, guint16 len )
{
guint16 i,j, bs_count, new_len;
gboolean backslash = FALSE;
gchar *rv;
if ( len < 1 )
return NULL;
for ( i = 0, bs_count = 0; i < len; i++ )
if ( str[i] == '\\' )
{
bs_count++;
i++;
}
if ( str[i-1] == '\\' && (len == 1 || str[i-2] != '\\') )
bs_count--;
new_len = len - bs_count;
rv = g_malloc ( (new_len+1) * sizeof(gchar) );
for ( i = 0, j = 0; i < len && j < new_len; i++ )
if ( str[i] == '\\' && !backslash )
backslash = TRUE;
else
{
rv[j++] = str[i];
backslash = FALSE;
}
rv[new_len] = '\0';
return rv;
}
/*
* Returns whether file read was a success
* No obvious way to test for a 'gpspoint' file,
* thus set a flag if any actual tag found during processing of the file
*/
gboolean a_gpspoint_read_file(VikTrwLayer *trw, FILE *f ) {
VikCoordMode coord_mode = vik_trw_layer_get_coord_mode ( trw );
gchar *tag_start, *tag_end;
g_assert ( f != NULL && trw != NULL );
line_type = 0;
line_timestamp = 0;
line_newsegment = FALSE;
line_image = NULL;
line_symbol = NULL;
current_track = NULL;
gboolean have_read_something = FALSE;
while (fgets(line_buffer, 2048, f))
{
gboolean inside_quote = 0;
gboolean backslash = 0;
line_buffer[strlen(line_buffer)-1] = '\0'; /* chop off newline */
/* for gpspoint files wrapped inside */
if ( strlen(line_buffer) >= 13 && strncmp ( line_buffer, "~EndLayerData", 13 ) == 0 )
break;
/* each line: nullify stuff, make thing if nes, free name if ness */
tag_start = line_buffer;
for (;;)
{
/* my addition: find first non-whitespace character. if the null, skip line. */
while (*tag_start != '\0' && isspace(*tag_start))
tag_start++;
if (tag_start == '\0')
break;
if (*tag_start == '#')
break;
tag_end = tag_start;
if (*tag_end == '"')
inside_quote = !inside_quote;
while (*tag_end != '\0' && (!isspace(*tag_end) || inside_quote)) {
tag_end++;
if (*tag_end == '\\' && !backslash)
backslash = TRUE;
else if (backslash)
backslash = FALSE;
else if (*tag_end == '"')
inside_quote = !inside_quote;
}
gpspoint_process_tag ( tag_start, tag_end - tag_start );
if (*tag_end == '\0' )
break;
else
tag_start = tag_end+1;
}
if (line_type == GPSPOINT_TYPE_WAYPOINT && line_name)
{
have_read_something = TRUE;
VikWaypoint *wp = vik_waypoint_new();
wp->visible = line_visible;
wp->altitude = line_altitude;
vik_coord_load_from_latlon ( &(wp->coord), coord_mode, &line_latlon );
vik_trw_layer_filein_add_waypoint ( trw, line_name, wp );
g_free ( line_name );
line_name = NULL;
if ( line_comment )
{
vik_waypoint_set_comment ( wp, line_comment );
line_comment = NULL;
}
if ( line_image )
{
vik_waypoint_set_image ( wp, line_image );
line_image = NULL;
}
if ( line_symbol )
{
vik_waypoint_set_symbol ( wp, line_symbol );
line_symbol = NULL;
}
}
else if (line_type == GPSPOINT_TYPE_TRACK && line_name)
{
have_read_something = TRUE;
VikTrack *pl = vik_track_new();
/* Thanks to Peter Jones for this Fix */
if (!line_name) line_name = g_strdup("UNK");
pl->visible = line_visible;
if ( line_comment )
{
vik_track_set_comment ( pl, line_comment );
line_comment = NULL;
}
pl->trackpoints = NULL;
vik_trw_layer_filein_add_track ( trw, line_name, pl );
g_free ( line_name );
line_name = NULL;
current_track = pl;
}
else if (line_type == GPSPOINT_TYPE_TRACKPOINT && current_track)
{
have_read_something = TRUE;
VikTrackpoint *tp = vik_trackpoint_new();
vik_coord_load_from_latlon ( &(tp->coord), coord_mode, &line_latlon );
tp->newsegment = line_newsegment;
tp->has_timestamp = line_has_timestamp;
tp->timestamp = line_timestamp;
tp->altitude = line_altitude;
if (line_extended) {
tp->speed = line_speed;
tp->course = line_course;
tp->nsats = line_sat;
tp->fix_mode = line_fix;
}
current_track->trackpoints = g_list_append ( current_track->trackpoints, tp );
}
if (line_name)
g_free ( line_name );
line_name = NULL;
if (line_comment)
g_free ( line_comment );
if (line_image)
g_free ( line_image );
if (line_symbol)
g_free ( line_symbol );
line_comment = NULL;
line_image = NULL;
line_symbol = NULL;
line_type = GPSPOINT_TYPE_NONE;
line_newsegment = FALSE;
line_has_timestamp = FALSE;
line_timestamp = 0;
line_altitude = VIK_DEFAULT_ALTITUDE;
line_visible = TRUE;
line_symbol = NULL;
line_extended = FALSE;
line_speed = NAN;
line_course = NAN;
line_sat = 0;
line_fix = 0;
}
return have_read_something;
}
/* Tag will be of a few defined forms:
^[:alpha:]*=".*"$
^[:alpha:]*=.*$
<invalid tag>
So we must determine end of tag name, start of value, end of value.
*/
static void gpspoint_process_tag ( const gchar *tag, gint len )
{
const gchar *key_end, *value_start, *value_end;
/* Searching for key end */
key_end = tag;
while (++key_end - tag < len)
if (*key_end == '=')
break;
if (key_end - tag == len)
return; /* no good */
if (key_end - tag == len + 1)
value_start = value_end = 0; /* size = 0 */
else
{
value_start = key_end + 1; /* equal_sign plus one */
if (*value_start == '"')
{
value_start++;
if (*value_start == '"')
value_start = value_end = 0; /* size = 0 */
else
{
if (*(tag+len-1) == '"')
value_end = tag + len - 1;
else
return; /* bogus */
}
}
else
value_end = tag + len; /* value start really IS value start. */
gpspoint_process_key_and_value(tag, key_end - tag, value_start, value_end - value_start);
}
}
/*
value = NULL for none
*/
static void gpspoint_process_key_and_value ( const gchar *key, gint key_len, const gchar *value, gint value_len )
{
if (key_len == 4 && strncasecmp( key, "type", key_len ) == 0 )
{
if (value == NULL)
line_type = GPSPOINT_TYPE_NONE;
else if (value_len == 5 && strncasecmp( value, "track", value_len ) == 0 )
line_type = GPSPOINT_TYPE_TRACK;
else if (value_len == 10 && strncasecmp( value, "trackpoint", value_len ) == 0 )
line_type = GPSPOINT_TYPE_TRACKPOINT;
else if (value_len == 8 && strncasecmp( value, "waypoint", value_len ) == 0 )
line_type = GPSPOINT_TYPE_WAYPOINT;
else
/* all others are ignored */
line_type = GPSPOINT_TYPE_NONE;
}
else if (key_len == 4 && strncasecmp( key, "name", key_len ) == 0 && value != NULL)
{
if (line_name == NULL)
{
line_name = g_strndup ( value, value_len );
}
}
else if (key_len == 7 && strncasecmp( key, "comment", key_len ) == 0 && value != NULL)
{
if (line_comment == NULL)
line_comment = deslashndup ( value, value_len );
}
else if (key_len == 5 && strncasecmp( key, "image", key_len ) == 0 && value != NULL)
{
if (line_image == NULL)
line_image = deslashndup ( value, value_len );
}
else if (key_len == 8 && strncasecmp( key, "latitude", key_len ) == 0 && value != NULL)
{
line_latlon.lat = g_ascii_strtod(value, NULL);
}
else if (key_len == 9 && strncasecmp( key, "longitude", key_len ) == 0 && value != NULL)
{
line_latlon.lon = g_ascii_strtod(value, NULL);
}
else if (key_len == 8 && strncasecmp( key, "altitude", key_len ) == 0 && value != NULL)
{
line_altitude = g_ascii_strtod(value, NULL);
}
else if (key_len == 7 && strncasecmp( key, "visible", key_len ) == 0 && value[0] != 'y' && value[0] != 'Y' && value[0] != 't' && value[0] != 'T')
{
line_visible = FALSE;
}
else if (key_len == 6 && strncasecmp( key, "symbol", key_len ) == 0 && value != NULL)
{
line_symbol = g_strndup ( value, value_len );
}
else if (key_len == 8 && strncasecmp( key, "unixtime", key_len ) == 0 && value != NULL)
{
line_timestamp = g_ascii_strtod(value, NULL);
if ( line_timestamp != 0x80000000 )
line_has_timestamp = TRUE;
}
else if (key_len == 10 && strncasecmp( key, "newsegment", key_len ) == 0 && value != NULL)
{
line_newsegment = TRUE;
}
else if (key_len == 8 && strncasecmp( key, "extended", key_len ) == 0 && value != NULL)
{
line_extended = TRUE;
}
else if (key_len == 5 && strncasecmp( key, "speed", key_len ) == 0 && value != NULL)
{
line_speed = g_ascii_strtod(value, NULL);
}
else if (key_len == 6 && strncasecmp( key, "course", key_len ) == 0 && value != NULL)
{
line_course = g_ascii_strtod(value, NULL);
}
else if (key_len == 3 && strncasecmp( key, "sat", key_len ) == 0 && value != NULL)
{
line_sat = atoi(value);
}
else if (key_len == 3 && strncasecmp( key, "fix", key_len ) == 0 && value != NULL)
{
line_fix = atoi(value);
}
}
static void a_gpspoint_write_waypoint ( const gchar *name, VikWaypoint *wp, FILE *f )
{
static struct LatLon ll;
gchar *s_lat, *s_lon;
vik_coord_to_latlon ( &(wp->coord), &ll );
s_lat = a_coords_dtostr(ll.lat);
s_lon = a_coords_dtostr(ll.lon);
fprintf ( f, "type=\"waypoint\" latitude=\"%s\" longitude=\"%s\" name=\"%s\"", s_lat, s_lon, name );
g_free ( s_lat );
g_free ( s_lon );
if ( wp->altitude != VIK_DEFAULT_ALTITUDE ) {
gchar *s_alt = a_coords_dtostr(wp->altitude);
fprintf ( f, " altitude=\"%s\"", s_alt );
g_free(s_alt);
}
if ( wp->comment )
{
gchar *tmp_comment = slashdup(wp->comment);
fprintf ( f, " comment=\"%s\"", tmp_comment );
g_free ( tmp_comment );
}
if ( wp->image )
{
gchar *tmp_image = slashdup(wp->image);
fprintf ( f, " image=\"%s\"", tmp_image );
g_free ( tmp_image );
}
if ( wp->symbol )
{
fprintf ( f, " symbol=\"%s\"", wp->symbol );
}
if ( ! wp->visible )
fprintf ( f, " visible=\"n\"" );
fprintf ( f, "\n" );
}
static void a_gpspoint_write_trackpoint ( VikTrackpoint *tp, FILE *f )
{
static struct LatLon ll;
gchar *s_lat, *s_lon;
vik_coord_to_latlon ( &(tp->coord), &ll );
/* TODO: modify a_coords_dtostr() to accept (optional) buffer
* instead of doing malloc/free everytime */
s_lat = a_coords_dtostr(ll.lat);
s_lon = a_coords_dtostr(ll.lon);
fprintf ( f, "type=\"trackpoint\" latitude=\"%s\" longitude=\"%s\"", s_lat, s_lon );
g_free ( s_lat );
g_free ( s_lon );
if ( tp->altitude != VIK_DEFAULT_ALTITUDE ) {
gchar *s_alt = a_coords_dtostr(tp->altitude);
fprintf ( f, " altitude=\"%s\"", s_alt );
g_free(s_alt);
}
if ( tp->has_timestamp )
fprintf ( f, " unixtime=\"%ld\"", tp->timestamp );
if ( tp->newsegment )
fprintf ( f, " newsegment=\"yes\"" );
if (!isnan(tp->speed) || !isnan(tp->course) || tp->nsats > 0) {
fprintf ( f, " extended=\"yes\"" );
if (!isnan(tp->speed)) {
gchar *s_speed = a_coords_dtostr(tp->speed);
fprintf ( f, " speed=\"%s\"", s_speed );
g_free(s_speed);
}
if (!isnan(tp->course)) {
gchar *s_course = a_coords_dtostr(tp->course);
fprintf ( f, " course=\"%s\"", s_course );
g_free(s_course);
}
if (tp->nsats > 0)
fprintf ( f, " sat=\"%d\"", tp->nsats );
if (tp->fix_mode > 0)
fprintf ( f, " fix=\"%d\"", tp->fix_mode );
}
fprintf ( f, "\n" );
}
static void a_gpspoint_write_track ( const gchar *name, VikTrack *t, FILE *f )
{
if ( t->comment )
{
gchar *tmp_comment = slashdup(t->comment);
fprintf ( f, "type=\"track\" name=\"%s\" comment=\"%s\"%s\n", name, tmp_comment, t->visible ? "" : " visible=\"n\"" );
g_free ( tmp_comment );
}
else
fprintf ( f, "type=\"track\" name=\"%s\"%s\n", name, t->visible ? "" : " visible=\"n\"" );
g_list_foreach ( t->trackpoints, (GFunc) a_gpspoint_write_trackpoint, f );
fprintf ( f, "type=\"trackend\"\n" );
}
void a_gpspoint_write_file ( VikTrwLayer *trw, FILE *f )
{
GHashTable *tracks = vik_trw_layer_get_tracks ( trw );
GHashTable *waypoints = vik_trw_layer_get_waypoints ( trw );
fprintf ( f, "type=\"waypointlist\"\n" );
g_hash_table_foreach ( waypoints, (GHFunc) a_gpspoint_write_waypoint, f );
fprintf ( f, "type=\"waypointlistend\"\n" );
g_hash_table_foreach ( tracks, (GHFunc) a_gpspoint_write_track, f );
}