correct handling of disc status and blank discs in read volset

src/isofs_wrap.c

@@ -76,6 +76,7 @@ int isoburn_read_volset(struct burn_drive *d, struct isoburn_read_opts *read_opt
 {
  int ret;
  struct ecma119_read_opts ropts;
+ enum burn_disc_status status;
  struct isoburn *o;
 
  assert(d && read_opts && volset);
@@ -88,15 +89,34 @@ int isoburn_read_volset(struct burn_drive *d, struct isoburn_read_opts *read_opt
  	return -1;
  }
 
- // TODO replace with isoburn_disc_get_status()
+ status = isoburn_disc_get_status(d);
- // Check for suitable FULL or APPENDABLE status. Full only useful for image
+ if (status == BURN_DISC_BLANK) {
- // modification
+   struct iso_volume *volume;
- if (o->fabricated_disc_status == BURN_DISC_BLANK) {
+   struct iso_tree_node_dir *root;
-   // FIXME construct an empty volset!!
+   
-   *volset = NULL;
+   /*
+    * Blank disc, we create a new volset without files.
+    */
+   
+   root = iso_tree_new_root();
+   if (!root)
+     return -1;
+   
+   volume = iso_volume_new_with_root("NEW DISC", "", "LIBISOBURN", root);
+   if (!volume)
+     return -1;
+   
+   *volset = iso_volset_new(volume, "NEW VOLSET");
+   if (!*volset)
+     return -1;
    return 1;
  }
-
+ 
+ if (status != BURN_DISC_APPENDABLE && status != BURN_DISC_FULL) {
+   /* incorrect disc status */
+   return -4;	
+ }
+ 
  ret = isoburn_disc_get_msc1(d, (int*) &ropts.block);
  if (ret < 0)
    return -2;

src/libisoburn.h

@@ -114,10 +114,8 @@ struct isoburn_read_opts {
     Not a wrapper, but peculiar to libisoburn.
     @param d The drive which holds an existing ISO filesystem
     @param read_opts The read options which can be chosen by the application
-    @param volset the volset that represents the image, or NULL if the image is 
+    @param volset the volset that represents the image, if the disc is blacnk
-                  empty.
+                  it will have no files
-                  <<<<< What about return a volset without file if image is
-                        empty <<<<<<<<<
     @return <=0 error , 1 = success
       >>>>> error means damaged or unsupported image
              error code is stored in ecma119_read_opts in libisofs

test/test.c

@@ -117,17 +117,6 @@ int main(int argc, char **argv)
 		printf("Can't read volset\n");
 		goto exit_cleanup;
 	}
-	printf("Volset read\n");
-	fflush(stdout);
-	
-	if (!volset) {
-		// TODO this piece of code should be inside libisoburn
-		struct iso_volume *volume;
-		
-		root = iso_tree_new_root(); 
-		volume = iso_volume_new_with_root("NEW DISC", "", "LIBISOBURN", root);
-		volset = iso_volset_new( volume, "VOLSETID" );
-	}
 	root = iso_volume_get_root(iso_volset_get_volume(volset, 0));
 	
 	/* add a new dir */