src/vikwaypoint.c

   1 /*
   2  * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
   3  *
   4  * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include <glib.h>
  23 #include <string.h>
  24 #include "coords.h"
  25 #include "vikcoord.h"
  26 #include "vikwaypoint.h"
  27
  28
  29 VikWaypoint *vik_waypoint_new()
  30 {
  31   VikWaypoint *wp = g_malloc ( sizeof ( VikWaypoint ) );
  32   wp->comment = NULL;
  33   wp->image = NULL;
  34   wp->symbol = NULL;
  35   return wp;
  36 }
  37
  38 void vik_waypoint_set_comment_no_copy(VikWaypoint *wp, gchar *comment)
  39 {
  40   if ( wp->comment )
  41     g_free ( wp->comment );
  42   wp->comment = comment;
  43 }
  44
  45 void vik_waypoint_set_comment(VikWaypoint *wp, const gchar *comment)
  46 {
  47   if ( wp->comment )
  48     g_free ( wp->comment );
  49
  50   if ( comment && comment[0] != '\0' )
  51     wp->comment = g_strdup(comment);
  52   else
  53     wp->comment = NULL;
  54 }
  55
  56 void vik_waypoint_set_image(VikWaypoint *wp, const gchar *image)
  57 {
  58   if ( wp->image )
  59     g_free ( wp->image );
  60
  61   if ( image && image[0] != '\0' )
  62     wp->image = g_strdup(image);
  63   else
  64     wp->image = NULL;
  65 }
  66
  67 void vik_waypoint_set_symbol(VikWaypoint *wp, const gchar *symname)
  68 {
  69   if ( wp->symbol )
  70     g_free ( wp->symbol );
  71
  72   if ( symname && symname[0] != '\0' )
  73     wp->symbol = g_strdup(symname);
  74   else
  75     wp->symbol = NULL;
  76 }
  77
  78 void vik_waypoint_free(VikWaypoint *wp)
  79 {
  80   if ( wp->comment )
  81     g_free ( wp->comment );
  82   if ( wp->image )
  83     g_free ( wp->image );
  84   if ( wp->symbol )
  85     g_free ( wp->symbol );
  86   g_free ( wp );
  87 }
  88
  89 VikWaypoint *vik_waypoint_copy(const VikWaypoint *wp)
  90 {
  91   VikWaypoint *new_wp = vik_waypoint_new();
  92   *new_wp = *wp;
  93   new_wp->comment = NULL; /* if the waypoint had a comment, FOR CRYING OUT LOUD DON'T FREE IT! This lousy bug took me TWO HOURS to figure out... sigh... */
  94   vik_waypoint_set_comment(new_wp,wp->comment);
  95   new_wp->image = NULL;
  96   vik_waypoint_set_image(new_wp,wp->image);
  97   new_wp->symbol = NULL;
  98   vik_waypoint_set_symbol(new_wp,wp->symbol);
  99   return new_wp;
 100 }
 101
 102 void vik_waypoint_marshall ( VikWaypoint *wp, guint8 **data, guint *datalen)
 103 {
 104   GByteArray *b = g_byte_array_new();
 105   guint len;
 106
 107   g_byte_array_append(b, (guint8 *)wp, sizeof(*wp));
 108
 109 #define vwm_append(s) \
 110   len = (s) ? strlen(s)+1 : 0; \
 111   g_byte_array_append(b, (guint8 *)&len, sizeof(len)); \
 112   if (s) g_byte_array_append(b, (guint8 *)s, len);
 113
 114   vwm_append(wp->comment);
 115   vwm_append(wp->image);
 116   vwm_append(wp->symbol);
 117
 118   *data = b->data;
 119   *datalen = b->len;
 120   g_byte_array_free(b, FALSE);
 121 #undef vwm_append
 122 }
 123
 124 VikWaypoint *vik_waypoint_unmarshall (guint8 *data, guint datalen)
 125 {
 126   guint len;
 127   VikWaypoint *new_wp = vik_waypoint_new();
 128   memcpy(new_wp, data, sizeof(*new_wp));
 129   data += sizeof(*new_wp);
 130
 131 #define vwu_get(s) \
 132   len = *(guint *)data; \
 133   data += sizeof(len); \
 134   if (len) { \
 135     (s) = g_strdup((gchar *)data); \
 136   } else { \
 137     (s) = NULL; \
 138   } \
 139   data += len;
 140
 141   vwu_get(new_wp->comment);
 142   vwu_get(new_wp->image);
 143   vwu_get(new_wp->symbol);
 144
 145   return new_wp;
 146 #undef vwu_get
 147 }
 148