Fix crashing on double clicks - properly initialize variable.

[andy/viking.git] / src / babel.c

diff --git a/src/babel.c b/src/babel.c
index 56f90df91410e38653d05dd2b1656816835ade2b..93ad52e32cbf00f7d0c73634a1bf66c6ca5ba898 100644 (file)
--- a/src/babel.c
+++ b/src/babel.c
@@ -3,6 +3,7 @@
  *
  * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
  * Copyright (C) 2006, Quy Tonthat <qtonthat@gmail.com>
  *
  * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
  * Copyright (C) 2006, Quy Tonthat <qtonthat@gmail.com>

+ * Copyright (C) 2013, Guilhem Bonnefille <guilhem.bonnefille@gmail.com>

  *
  * 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
  *
  * 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


@@ -37,9 +38,6 @@
 #include "gpx.h"
 #include "babel.h"
 #include <stdio.h>
 #include "gpx.h"
 #include "babel.h"
 #include <stdio.h>

-#ifdef HAVE_SYS_WAIT_H
-#include <sys/wait.h>
-#endif

 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif


@@ -50,6 +48,11 @@
 /* TODO in the future we could have support for other shells (change command strings), or not use a shell at all */
 #define BASH_LOCATION "/bin/bash"
 
 /* TODO in the future we could have support for other shells (change command strings), or not use a shell at all */
 #define BASH_LOCATION "/bin/bash"
 

+/**
+ * List of supported protocols.
+ */
+const gchar *PROTOS[] = { "http://", "https://", "ftp://", NULL };
+

 /**
  * Path to gpsbabel
  */
 /**
  * Path to gpsbabel
  */


@@ -70,12 +73,39 @@ GList *a_babel_file_list;
  */
 GList *a_babel_device_list;
 
  */
 GList *a_babel_device_list;
 

+/**
+ * Run a function on all file formats supporting a given mode.
+ */
+void a_babel_foreach_file_with_mode (BabelMode mode, GFunc func, gpointer user_data)
+{
+  GList *current;
+  for ( current = g_list_first (a_babel_file_list) ;
+        current != NULL ;
+        current = g_list_next (current) )
+  {
+    BabelFile *currentFile = current->data;
+    /* Check compatibility of modes */
+    gboolean compat = TRUE;
+    if (mode.waypointsRead  && ! currentFile->mode.waypointsRead)  compat = FALSE;
+    if (mode.waypointsWrite && ! currentFile->mode.waypointsWrite) compat = FALSE;
+    if (mode.tracksRead     && ! currentFile->mode.tracksRead)     compat = FALSE;
+    if (mode.tracksWrite    && ! currentFile->mode.tracksWrite)    compat = FALSE;
+    if (mode.routesRead     && ! currentFile->mode.routesRead)     compat = FALSE;
+    if (mode.routesWrite    && ! currentFile->mode.routesWrite)    compat = FALSE;
+    /* Do call */
+    if (compat)
+      func (currentFile, user_data);
+  }
+}
+

 /**
  * a_babel_convert:
  * @vt:        The TRW layer to modify. All data will be deleted, and replaced by what gpsbabel outputs.
  * @babelargs: A string containing gpsbabel command line filter options. No file types or names should
  *             be specified.
  * @cb:        A callback function.
 /**
  * a_babel_convert:
  * @vt:        The TRW layer to modify. All data will be deleted, and replaced by what gpsbabel outputs.
  * @babelargs: A string containing gpsbabel command line filter options. No file types or names should
  *             be specified.
  * @cb:        A callback function.

+ * @user_data: passed along to cb
+ * @not_used:  Must use NULL

  *
  * This function modifies data in a trw layer using gpsbabel filters.  This routine is synchronous;
  * that is, it will block the calling program until the conversion is done. To avoid blocking, call
  *
  * This function modifies data in a trw layer using gpsbabel filters.  This routine is synchronous;
  * that is, it will block the calling program until the conversion is done. To avoid blocking, call


@@ -83,7 +113,7 @@ GList *a_babel_device_list;
  *
  * Returns: %TRUE on success
  */
  *
  * Returns: %TRUE on success
  */

-gboolean a_babel_convert( VikTrwLayer *vt, const char *babelargs, BabelStatusFunc cb, gpointer user_data )
+gboolean a_babel_convert( VikTrwLayer *vt, const char *babelargs, BabelStatusFunc cb, gpointer user_data, gpointer not_used )

 {
   int fd_src;
   FILE *f;
 {
   int fd_src;
   FILE *f;


@@ -92,11 +122,12 @@ gboolean a_babel_convert( VikTrwLayer *vt, const char *babelargs, BabelStatusFun
   gchar *bargs = g_strconcat(babelargs, " -i gpx", NULL);
 
   if ((fd_src = g_file_open_tmp("tmp-viking.XXXXXX", &name_src, NULL)) >= 0) {
   gchar *bargs = g_strconcat(babelargs, " -i gpx", NULL);
 
   if ((fd_src = g_file_open_tmp("tmp-viking.XXXXXX", &name_src, NULL)) >= 0) {

+    g_debug ("%s: temporary file: %s", __FUNCTION__, name_src);

     f = fdopen(fd_src, "w");
     a_gpx_write_file(vt, f, NULL);
     fclose(f);
     f = NULL;
     f = fdopen(fd_src, "w");
     a_gpx_write_file(vt, f, NULL);
     fclose(f);
     f = NULL;

-    ret = a_babel_convert_from ( vt, bargs, name_src, cb, user_data );
+    ret = a_babel_convert_from ( vt, bargs, name_src, cb, user_data, not_used );

     g_remove(name_src);
     g_free(name_src);
   }
     g_remove(name_src);
     g_free(name_src);
   }


@@ -134,7 +165,7 @@ static gboolean babel_general_convert( BabelStatusFunc cb, gchar **args, gpointe
   gint babel_stdout;
 
   if (!g_spawn_async_with_pipes (NULL, args, NULL, G_SPAWN_DO_NOT_REAP_CHILD, NULL, NULL, &pid, NULL, &babel_stdout, NULL, &error)) {
   gint babel_stdout;
 
   if (!g_spawn_async_with_pipes (NULL, args, NULL, G_SPAWN_DO_NOT_REAP_CHILD, NULL, NULL, &pid, NULL, &babel_stdout, NULL, &error)) {

-    g_error("Async command failed: %s", error->message);
+    g_warning ("Async command failed: %s", error->message);

     g_error_free(error);
     ret = FALSE;
   } else {
     g_error_free(error);
     ret = FALSE;
   } else {


@@ -207,6 +238,8 @@ static gboolean babel_general_convert_from( VikTrwLayer *vt, BabelStatusFunc cb,
  * @babelargs: A string containing gpsbabel command line options. In addition to any filters, this string
  *             must include the input file type (-i) option.
  * @cb:               Optional callback function. Same usage as in a_babel_convert().
  * @babelargs: A string containing gpsbabel command line options. In addition to any filters, this string
  *             must include the input file type (-i) option.
  * @cb:               Optional callback function. Same usage as in a_babel_convert().

+ * @user_data: passed along to cb
+ * @not_used:  Must use NULL

  *
  * Loads data into a trw layer from a file, using gpsbabel.  This routine is synchronous;
  * that is, it will block the calling program until the conversion is done. To avoid blocking, call
  *
  * Loads data into a trw layer from a file, using gpsbabel.  This routine is synchronous;
  * that is, it will block the calling program until the conversion is done. To avoid blocking, call


@@ -214,7 +247,7 @@ static gboolean babel_general_convert_from( VikTrwLayer *vt, BabelStatusFunc cb,
  *
  * Returns: %TRUE on success
  */
  *
  * Returns: %TRUE on success
  */

-gboolean a_babel_convert_from( VikTrwLayer *vt, const char *babelargs, const char *from, BabelStatusFunc cb, gpointer user_data )
+gboolean a_babel_convert_from( VikTrwLayer *vt, const char *babelargs, const char *from, BabelStatusFunc cb, gpointer user_data, gpointer not_used )

 {
   int i,j;
   int fd_dst;
 {
   int i,j;
   int fd_dst;


@@ -223,6 +256,7 @@ gboolean a_babel_convert_from( VikTrwLayer *vt, const char *babelargs, const cha
   gchar *args[64];
 
   if ((fd_dst = g_file_open_tmp("tmp-viking.XXXXXX", &name_dst, NULL)) >= 0) {
   gchar *args[64];
 
   if ((fd_dst = g_file_open_tmp("tmp-viking.XXXXXX", &name_dst, NULL)) >= 0) {

+    g_debug ("%s: temporary file: %s", __FUNCTION__, name_dst);

     close(fd_dst);
 
     if (gpsbabel_loc ) {
     close(fd_dst);
 
     if (gpsbabel_loc ) {


@@ -259,6 +293,11 @@ gboolean a_babel_convert_from( VikTrwLayer *vt, const char *babelargs, const cha
 
 /**
  * a_babel_convert_from_shellcommand:
 
 /**
  * a_babel_convert_from_shellcommand:

+ * @vt: The #VikTrwLayer where to insert the collected data
+ * @input_cmd: the command to run
+ * @cb:               Optional callback function. Same usage as in a_babel_convert().
+ * @user_data: passed along to cb
+ * @not_used:  Must use NULL

  *
  * Runs the input command in a shell (bash) and optionally uses GPSBabel to convert from input_file_type.
  * If input_file_type is %NULL, doesn't use GPSBabel. Input must be GPX (or Geocaching *.loc)
  *
  * Runs the input command in a shell (bash) and optionally uses GPSBabel to convert from input_file_type.
  * If input_file_type is %NULL, doesn't use GPSBabel. Input must be GPX (or Geocaching *.loc)


@@ -266,7 +305,7 @@ gboolean a_babel_convert_from( VikTrwLayer *vt, const char *babelargs, const cha
  * Uses babel_general_convert_from() to actually run the command. This function
  * prepares the command and temporary file, and sets up the arguments for bash.
  */
  * Uses babel_general_convert_from() to actually run the command. This function
  * prepares the command and temporary file, and sets up the arguments for bash.
  */

-gboolean a_babel_convert_from_shellcommand ( VikTrwLayer *vt, const char *input_cmd, const char *input_file_type, BabelStatusFunc cb, gpointer user_data )
+gboolean a_babel_convert_from_shellcommand ( VikTrwLayer *vt, const char *input_cmd, const char *input_file_type, BabelStatusFunc cb, gpointer user_data, gpointer not_used )

 {
   int fd_dst;
   gchar *name_dst = NULL;
 {
   int fd_dst;
   gchar *name_dst = NULL;


@@ -274,6 +313,7 @@ gboolean a_babel_convert_from_shellcommand ( VikTrwLayer *vt, const char *input_
   gchar **args;  
 
   if ((fd_dst = g_file_open_tmp("tmp-viking.XXXXXX", &name_dst, NULL)) >= 0) {
   gchar **args;  
 
   if ((fd_dst = g_file_open_tmp("tmp-viking.XXXXXX", &name_dst, NULL)) >= 0) {

+    g_debug ("%s: temporary file: %s", __FUNCTION__, name_dst);

     gchar *shell_command;
     if ( input_file_type )
       shell_command = g_strdup_printf("%s | %s -i %s -f - -o gpx -F %s",
     gchar *shell_command;
     if ( input_file_type )
       shell_command = g_strdup_printf("%s | %s -i %s -f - -o gpx -F %s",


@@ -300,9 +340,26 @@ gboolean a_babel_convert_from_shellcommand ( VikTrwLayer *vt, const char *input_
   return ret;
 }
 
   return ret;
 }
 

-gboolean a_babel_convert_from_url ( VikTrwLayer *vt, const char *url, const char *input_type, BabelStatusFunc cb, gpointer user_data )
+/**
+ * a_babel_convert_from_url:
+ * @vt: The #VikTrwLayer where to insert the collected data
+ * @url: the URL to fetch
+ * @cb:               Optional callback function. Same usage as in a_babel_convert().
+ * @user_data: passed along to cb
+ * @options:   download options. Maybe NULL.
+ *
+ * Download the file pointed by the URL and optionally uses GPSBabel to convert from input_file_type.
+ * If input_file_type is %NULL, doesn't use GPSBabel. Input must be GPX.
+ *
+ * Returns: %TRUE on successful invocation of GPSBabel or read of the GPX
+ *
+ */
+gboolean a_babel_convert_from_url ( VikTrwLayer *vt, const char *url, const char *input_type, BabelStatusFunc cb, gpointer user_data, DownloadMapOptions *options )

 {
 {

-  static DownloadMapOptions options = { FALSE, FALSE, NULL, 0, a_check_kml_file};
+  // If no download options specified, use defaults:
+  DownloadMapOptions myoptions = { FALSE, FALSE, NULL, 2, NULL, NULL, NULL };
+  if ( options )
+    myoptions = *options;

   gint fd_src;
   int fetch_ret;
   gboolean ret = FALSE;
   gint fd_src;
   int fetch_ret;
   gboolean ret = FALSE;


@@ -312,15 +369,26 @@ gboolean a_babel_convert_from_url ( VikTrwLayer *vt, const char *url, const char
   g_debug("%s: input_type=%s url=%s", __FUNCTION__, input_type, url);
 
   if ((fd_src = g_file_open_tmp("tmp-viking.XXXXXX", &name_src, NULL)) >= 0) {
   g_debug("%s: input_type=%s url=%s", __FUNCTION__, input_type, url);
 
   if ((fd_src = g_file_open_tmp("tmp-viking.XXXXXX", &name_src, NULL)) >= 0) {

+    g_debug ("%s: temporary file: %s", __FUNCTION__, name_src);

     close(fd_src);
     g_remove(name_src);
 
     close(fd_src);
     g_remove(name_src);
 

-    babelargs = g_strdup_printf(" -i %s", input_type);
-
-    fetch_ret = a_http_download_get_url(url, "", name_src, &options, NULL);
-    if (fetch_ret == 0)
-      ret = a_babel_convert_from( vt, babelargs, name_src, NULL, NULL);
- 
+    fetch_ret = a_http_download_get_url(url, "", name_src, &myoptions, NULL);
+    if (fetch_ret == 0) {
+      if (input_type != NULL) {
+        babelargs = g_strdup_printf(" -i %s", input_type);
+        ret = a_babel_convert_from( vt, babelargs, name_src, NULL, NULL, NULL );
+      } else {
+        /* Process directly the retrieved file */
+        g_debug("%s: directly read GPX file %s", __FUNCTION__, name_src);
+        FILE *f = g_fopen(name_src, "r");
+        if (f) {
+          ret = a_gpx_read_file ( vt, f );
+          fclose(f);
+          f = NULL;
+        }
+      }
+    }

     g_remove(name_src);
     g_free(babelargs);
     g_free(name_src);
     g_remove(name_src);
     g_free(babelargs);
     g_free(name_src);


@@ -329,6 +397,43 @@ gboolean a_babel_convert_from_url ( VikTrwLayer *vt, const char *url, const char
   return ret;
 }
 
   return ret;
 }
 

+/**
+ * a_babel_convert_from_url_or_shell:
+ * @vt: The #VikTrwLayer where to insert the collected data
+ * @url: the URL to fetch
+ * @cb:               Optional callback function. Same usage as in a_babel_convert().
+ * @user_data: passed along to cb
+ * @options:   download options. Maybe NULL.
+ *
+ * Download the file pointed by the URL and optionally uses GPSBabel to convert from input_file_type.
+ * If input_file_type is %NULL, doesn't use GPSBabel. Input must be GPX.
+ *
+ * Returns: %TRUE on successful invocation of GPSBabel or read of the GPX
+ *
+ */
+gboolean a_babel_convert_from_url_or_shell ( VikTrwLayer *vt, const char *input, const char *input_type, BabelStatusFunc cb, gpointer user_data, DownloadMapOptions *options )
+{
+  
+  /* Check nature of input */
+  gboolean isUrl = FALSE;
+  int i = 0;
+  for (i = 0 ; PROTOS[i] != NULL ; i++)
+  {
+    const gchar *proto = PROTOS[i];
+    if (strncmp (input, proto, strlen(proto)) == 0)
+    {
+      /* Procotol matches: save result */
+      isUrl = TRUE;
+    }
+  }
+  
+  /* Do the job */
+  if (isUrl)
+    return a_babel_convert_from_url (vt, input, input_type, cb, user_data, options);
+  else
+    return a_babel_convert_from_shellcommand (vt, input, input_type, cb, user_data, options);
+}
+

 static gboolean babel_general_convert_to( VikTrwLayer *vt, VikTrack *trk, BabelStatusFunc cb, gchar **args, const gchar *name_src, gpointer user_data )
 {
   // Now strips out invisible tracks and waypoints
 static gboolean babel_general_convert_to( VikTrwLayer *vt, VikTrack *trk, BabelStatusFunc cb, gchar **args, const gchar *name_src, gpointer user_data )
 {
   // Now strips out invisible tracks and waypoints


@@ -342,12 +447,13 @@ static gboolean babel_general_convert_to( VikTrwLayer *vt, VikTrack *trk, BabelS
 
 /**
  * a_babel_convert_to:
 
 /**
  * a_babel_convert_to:

- * @vt             The TRW layer from which data is taken.
- * @track          Operate on the individual track if specified. Use NULL when operating on a TRW layer
- * @babelargs      A string containing gpsbabel command line options.  In addition to any filters, this string
+ * @vt:             The TRW layer from which data is taken.
+ * @track:          Operate on the individual track if specified. Use NULL when operating on a TRW layer
+ * @babelargs:      A string containing gpsbabel command line options.  In addition to any filters, this string

  *                 must include the input file type (-i) option.
  *                 must include the input file type (-i) option.

- * @to             Filename or device the data is written to.
- * @cb            Optional callback function. Same usage as in a_babel_convert.
+ * @to:             Filename or device the data is written to.
+ * @cb:                   Optional callback function. Same usage as in a_babel_convert.
+ * @user_data: passed along to cb

  *
  * Exports data using gpsbabel.  This routine is synchronous;
  * that is, it will block the calling program until the conversion is done. To avoid blocking, call
  *
  * Exports data using gpsbabel.  This routine is synchronous;
  * that is, it will block the calling program until the conversion is done. To avoid blocking, call


@@ -364,6 +470,7 @@ gboolean a_babel_convert_to( VikTrwLayer *vt, VikTrack *track, const char *babel
   gchar *args[64];  
 
   if ((fd_src = g_file_open_tmp("tmp-viking.XXXXXX", &name_src, NULL)) >= 0) {
   gchar *args[64];  
 
   if ((fd_src = g_file_open_tmp("tmp-viking.XXXXXX", &name_src, NULL)) >= 0) {

+    g_debug ("%s: temporary file: %s", __FUNCTION__, name_src);

     close(fd_src);
 
     if (gpsbabel_loc ) {
     close(fd_src);
 
     if (gpsbabel_loc ) {


@@ -397,18 +504,18 @@ gboolean a_babel_convert_to( VikTrwLayer *vt, VikTrack *track, const char *babel
   return ret;
 }
 
   return ret;
 }
 

-static void set_mode(BabelMode mode, gchar *smode)
+static void set_mode(BabelMode *mode, gchar *smode)

 {
 {

-  mode.waypointsRead  = smode[0] == 'r';
-  mode.waypointsWrite = smode[1] == 'w';
-  mode.tracksRead     = smode[2] == 'r';
-  mode.tracksWrite    = smode[3] == 'w';
-  mode.routesRead     = smode[4] == 'r';
-  mode.routesWrite    = smode[5] == 'w';
+  mode->waypointsRead  = smode[0] == 'r';
+  mode->waypointsWrite = smode[1] == 'w';
+  mode->tracksRead     = smode[2] == 'r';
+  mode->tracksWrite    = smode[3] == 'w';
+  mode->routesRead     = smode[4] == 'r';
+  mode->routesWrite    = smode[5] == 'w';

 }
 
 /**
 }
 
 /**

- * load_feature:
+ * load_feature_parse_line:

  * 
  * Load a single feature stored in the given line.
  */
  * 
  * Load a single feature stored in the given line.
  */


@@ -423,11 +530,16 @@ static void load_feature_parse_line (gchar *line)
            && tokens[3] != NULL
            && tokens[4] != NULL ) {
         BabelDevice *device = g_malloc ( sizeof (BabelDevice) );
            && tokens[3] != NULL
            && tokens[4] != NULL ) {
         BabelDevice *device = g_malloc ( sizeof (BabelDevice) );

-        set_mode (device->mode, tokens[1]);
+        set_mode (&(device->mode), tokens[1]);

         device->name = g_strdup (tokens[2]);
         device->label = g_strndup (tokens[4], 50); // Limit really long label text
         a_babel_device_list = g_list_append (a_babel_device_list, device);
         device->name = g_strdup (tokens[2]);
         device->label = g_strndup (tokens[4], 50); // Limit really long label text
         a_babel_device_list = g_list_append (a_babel_device_list, device);

-        g_debug ("New gpsbabel device: %s", device->name);
+        g_debug ("New gpsbabel device: %s, %d%d%d%d%d%d(%s)",
+                       device->name,
+                       device->mode.waypointsRead, device->mode.waypointsWrite,
+                       device->mode.tracksRead, device->mode.tracksWrite,
+                       device->mode.routesRead, device->mode.routesWrite,
+                               tokens[1]);

       } else {
         g_warning ( "Unexpected gpsbabel format string: %s", line);
       }
       } else {
         g_warning ( "Unexpected gpsbabel format string: %s", line);
       }


@@ -437,12 +549,17 @@ static void load_feature_parse_line (gchar *line)
            && tokens[3] != NULL
            && tokens[4] != NULL ) {
         BabelFile *file = g_malloc ( sizeof (BabelFile) );
            && tokens[3] != NULL
            && tokens[4] != NULL ) {
         BabelFile *file = g_malloc ( sizeof (BabelFile) );

-        set_mode (file->mode, tokens[1]);
+        set_mode (&(file->mode), tokens[1]);

         file->name = g_strdup (tokens[2]);
         file->ext = g_strdup (tokens[3]);
         file->label = g_strdup (tokens[4]);
         a_babel_file_list = g_list_append (a_babel_file_list, file);
         file->name = g_strdup (tokens[2]);
         file->ext = g_strdup (tokens[3]);
         file->label = g_strdup (tokens[4]);
         a_babel_file_list = g_list_append (a_babel_file_list, file);

-        g_debug ("New gpsbabel file: %s", file->name);
+        g_debug ("New gpsbabel file: %s, %d%d%d%d%d%d(%s)",
+                       file->name,
+                       file->mode.waypointsRead, file->mode.waypointsWrite,
+                       file->mode.tracksRead, file->mode.tracksWrite,
+                       file->mode.routesRead, file->mode.routesWrite,
+                       tokens[1]);

       } else {
         g_warning ( "Unexpected gpsbabel format string: %s", line);
       }
       } else {
         g_warning ( "Unexpected gpsbabel format string: %s", line);
       }


@@ -480,19 +597,36 @@ static gboolean load_feature ()
   return ret;
 }
 
   return ret;
 }
 

+/**
+ * a_babel_init:
+ * 
+ * Initialises babel module.
+ * Mainly check existence of gpsbabel progam
+ * and load all features available in ths version.
+ */

 void a_babel_init ()
 {
   /* TODO allow to set gpsbabel path via command line */
   gpsbabel_loc = g_find_program_in_path( "gpsbabel" );
   if ( !gpsbabel_loc )
     g_critical( "gpsbabel not found in PATH" );
 void a_babel_init ()
 {
   /* TODO allow to set gpsbabel path via command line */
   gpsbabel_loc = g_find_program_in_path( "gpsbabel" );
   if ( !gpsbabel_loc )
     g_critical( "gpsbabel not found in PATH" );

+
+  // Unlikely to package unbuffer on Windows so ATM don't even bother trying
+  // Highly unlikely unbuffer is available on a Windows system otherwise
+#ifndef WINDOWS

   unbuffer_loc = g_find_program_in_path( "unbuffer" );
   if ( !unbuffer_loc )
     g_warning( "unbuffer not found in PATH" );
   unbuffer_loc = g_find_program_in_path( "unbuffer" );
   if ( !unbuffer_loc )
     g_warning( "unbuffer not found in PATH" );

+#endif

 
   load_feature ();
 }
 
 
   load_feature ();
 }
 

+/**
+ * a_babel_uninit:
+ * 
+ * Free resources acquired by a_babel_init.
+ */

 void a_babel_uninit ()
 {
   g_free ( gpsbabel_loc );
 void a_babel_uninit ()
 {
   g_free ( gpsbabel_loc );


@@ -522,3 +656,15 @@ void a_babel_uninit ()
   }
 
 }
   }
 
 }

+
+/**
+ * a_babel_available:
+ *
+ * Indicates if babel is available or not.
+ *
+ * Returns: true if babel available
+ */
+gboolean a_babel_available ()
+{
+  return a_babel_device_list != NULL;
+}