consolidate the 3 file_exists() functions into one; use the version that explicitly uses dircache; give dir_exists() the same treatment for consistency

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15742 a1c6a512-1295-4272-9138-f99709370657

apps/plugins/shortcuts/shortcuts.h

@@ -79,9 +79,6 @@ bool remove_entry(sc_file_t *file, int entry_idx);
 /* Checks whether the index is a valid one for the file. */
 bool is_valid_index(sc_file_t *file, int entry_idx);
 
-bool file_exists(char *filename); /* Does the specified file exist? */
-bool dir_exists(char *path); /* Does the specified dir exist? */
-
 
 #ifdef SC_DEBUG
 void print_file(sc_file_t *file);

apps/plugins/shortcuts/shortcuts_append.c

@@ -70,9 +70,9 @@ enum plugin_status plugin_start(struct plugin_api* api, void* void_parameter)
      * if it's a dir and then file (not vice versa) since
      * open() can also open a dir */
     found = true;
-    if (dir_exists(parameter)) {
+    if (rb->dir_exists(parameter)) {
         its_a_dir = true;
-    } else if (file_exists(parameter)) {
+    } else if (rb->file_exists(parameter)) {
         its_a_dir = false;
     } else {
         found = false;

apps/plugins/shortcuts/shortcuts_common.c

@@ -360,35 +360,3 @@ void write_entry_to_file(int fd, sc_entry_t *entry)
     }
     rb->fdprintf(fd, "\n");
 }
-
-
-bool file_exists(char *filename)
-{
-    int fd = rb->open(filename, O_RDONLY);
-    bool retval;
-    if (fd >= 0) {
-        rb->close(fd);
-        retval = true;
-    } else {
-        retval = false;
-    }
-    DEBUGF("Checked existence of the file '%s': %s\n",
-            filename, (retval ? "found" : "NOT FOUND"));
-    return retval;
-}
-
-
-bool dir_exists(char *path)
-{
-    DIR* d = rb->opendir(path);
-    bool retval;
-    if (d != NULL) {
-        rb->closedir(d);
-        retval = true;
-    } else {
-        retval = false;
-    }
-    DEBUGF("Checked existence of the dir '%s': %s\n",
-            path, (retval ? "found" : "NOT FOUND"));
-    return retval;
-}

apps/plugins/shortcuts/shortcuts_view.c

@@ -166,10 +166,10 @@ bool goto_entry(char *file_or_dir)
     char *what;
     if (is_dir) {
         what = "Directory";
-        exists = dir_exists(file_or_dir);
+        exists = rb->dir_exists(file_or_dir);
     } else {
         what = "File";
-        exists = file_exists(file_or_dir);
+        exists = rb->file_exists(file_or_dir);
     }
 
     if (!exists) {