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- /* 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));
- }
-