+static VikLayerParamData convert_to_internal ( VikLayerParamData value )
+{
+ // From days into seconds
+ return VIK_LPD_UINT ( 86400 * value.u );
+}
+
+static VikLayerParam prefs[] = {
+ { VIK_LAYER_NUM_TYPES, VIKING_PREFERENCES_NAMESPACE "download_tile_age", VIK_LAYER_PARAM_UINT, VIK_LAYER_GROUP_NONE, N_("Tile age (days):"), VIK_LAYER_WIDGET_SPINBUTTON, ¶ms_scales[0], NULL, NULL, NULL, convert_to_display, convert_to_internal },
+};
+
+void a_download_init (void)
+{
+ VikLayerParamData tmp;
+ tmp.u = VIK_CONFIG_DEFAULT_TILE_AGE / 86400; // Now in days
+ a_preferences_register(prefs, tmp, VIKING_PREFERENCES_GROUP_KEY);
+
+ file_list_mutex = g_mutex_new();
+}
+
+static gboolean lock_file(const char *fn)
+{
+ gboolean locked = FALSE;
+ g_mutex_lock(file_list_mutex);
+ if (g_list_find_custom(file_list, fn, (GCompareFunc)g_strcmp0) == NULL)
+ {
+ // The filename is not yet locked
+ file_list = g_list_append(file_list, (gpointer)fn),
+ locked = TRUE;
+ }
+ g_mutex_unlock(file_list_mutex);
+ return locked;
+}
+
+static void unlock_file(const char *fn)
+{
+ g_mutex_lock(file_list_mutex);
+ file_list = g_list_remove(file_list, (gconstpointer)fn);
+ g_mutex_unlock(file_list_mutex);
+}
+
+
+static void uncompress_zip ( gchar *name )
+{
+ GError *error = NULL;
+ GMappedFile *mf;
+
+ if ((mf = g_mapped_file_new ( name, FALSE, &error )) == NULL) {
+ g_critical(_("Couldn't map file %s: %s"), name, error->message);
+ g_error_free(error);
+ return;
+ }
+ gchar *file_contents = g_mapped_file_get_contents ( mf );
+
+ void *unzip_mem = NULL;
+ gulong ucsize;
+
+ if ((unzip_mem = unzip_file (file_contents, &ucsize)) == NULL) {
+ g_mapped_file_unref ( mf );
+ return;
+ }
+
+ // This overwrires any previous file contents
+ if ( ! g_file_set_contents ( name, unzip_mem, ucsize, &error ) ) {
+ g_critical ( "Couldn't write file '%s', because of %s", name, error->message );
+ g_error_free ( error );
+ }
+}
+
+/**
+ * a_try_decompress_file:
+ * @name: The potentially compressed filename
+ *
+ * Perform magic to decide how which type of decompression to attempt
+ */
+void a_try_decompress_file (gchar *name)
+{
+#ifdef HAVE_MAGIC_H
+ magic_t myt = magic_open ( MAGIC_CONTINUE|MAGIC_ERROR|MAGIC_MIME );
+ gboolean zip = FALSE;
+ gboolean bzip2 = FALSE;
+ if ( myt ) {
+#ifdef WINDOWS
+ // We have to 'package' the magic database ourselves :(
+ // --> %PROGRAM FILES%\Viking\magic.mgc
+ magic_load ( myt, "magic.mgc" );
+#else
+ // Use system default
+ magic_load ( myt, NULL );
+#endif
+ const char* magic = magic_file (myt, name);
+ g_debug ("%s: magic output: %s", __FUNCTION__, magic );
+
+ if ( g_strcmp0 (magic, "application/zip; charset=binary") == 0 )
+ zip = TRUE;
+
+ if ( g_strcmp0 (magic, "application/x-bzip2; charset=binary") == 0 )
+ bzip2 = TRUE;
+
+ magic_close ( myt );
+ }
+
+ if ( !(zip || bzip2) )
+ return;
+
+ if ( zip ) {
+ uncompress_zip ( name );
+ }
+ else if ( bzip2 ) {
+ gchar* bz2_name = uncompress_bzip2 ( name );
+ g_remove ( name );
+ g_rename ( bz2_name, name );
+ }
+
+ return;
+#endif
+}
+
+static int download( const char *hostname, const char *uri, const char *fn, DownloadMapOptions *options, gboolean ftp, void *handle)