1 files changed, 76 insertions, 0 deletions
diff --git a/lib/bb-list.c b/lib/bb-list.c
new file mode 100644
index 0000000..e3df94e
--- /dev/null
+++ b/lib/bb-list.c
@@ -0,0 +1,76 @@
+/* bb-list.c: operations on bounding box lists.
+
+Copyright (C) 1992 Free Software Foundation, Inc.
+
+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
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "config.h"
+
+#include "bb-list.h"
+
+
+/* This routine returns an initialized empty list.  */
+
+bb_list_type
+bb_list_init ()
+{
+  bb_list_type bb_list;
+  
+  BB_LIST_LENGTH (bb_list) = 0;
+  BB_LIST_DATA (bb_list) = NULL;
+  
+  return bb_list;
+}
+
+/* Append BB to BB_LIST.  */
+
+void
+bb_list_append (bb_list_type *bb_list, bounding_box_type bb)
+{
+  BB_LIST_LENGTH (*bb_list)++;
+  XRETALLOC (BB_LIST_DATA (*bb_list), BB_LIST_LENGTH (*bb_list),
+             bounding_box_type);
+
+  BB_LIST_ELT (*bb_list, BB_LIST_LENGTH (*bb_list) - 1) = bb;
+}
+
+/* Append the elements in the list B2 onto the end of B1.  */
+
+void
+bb_list_splice (bb_list_type *b1, bb_list_type b2)
+{
+  unsigned new_length;
+  unsigned this_bb;
+
+  if (BB_LIST_LENGTH (b2) == 0)
+    return;
+    
+  assert (b1 != NULL);
+  
+  new_length = BB_LIST_LENGTH (*b1) + BB_LIST_LENGTH (b2);
+  XRETALLOC (BB_LIST_DATA (*b1), new_length, bounding_box_type);
+  
+  for (this_bb = 0; this_bb < BB_LIST_LENGTH (b2); this_bb++)
+    BB_LIST_ELT (*b1, BB_LIST_LENGTH (*b1)++) = BB_LIST_ELT (b2, this_bb);
+}
+
+/* Free the memory in a list.  */
+
+void
+bb_list_free (bb_list_type *bb_list)
+{
+  if (BB_LIST_DATA (*bb_list) != NULL)
+    safe_free ((address *) &BB_LIST_DATA (*bb_list));
+}