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- /* image-char.c: manipulate information about the characters in the image.
-
- 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 "image-char.h"
-
-
- /* Return an initialized, empty list. */
- image_char_list_type
- new_image_char_list ()
- {
- image_char_list_type l;
-
- IMAGE_CHAR_LIST_LENGTH (l) = 0;
- IMAGE_CHAR_LIST_DATA (l) = NULL;
-
- return l;
- }
-
-
- /* Append the character C to the list L. */
-
- void
- append_image_char (image_char_list_type *l, image_char_type c)
- {
- IMAGE_CHAR_LIST_LENGTH (*l)++;
- IMAGE_CHAR_LIST_DATA (*l)
- = xrealloc (IMAGE_CHAR_LIST_DATA (*l),
- IMAGE_CHAR_LIST_LENGTH (*l) * sizeof (image_char_type));
- IMAGE_CHAR (*l, IMAGE_CHAR_LIST_LENGTH (*l) - 1) = c;
- }
-
-
- /* Return false if the box BOX_COUNT boxes beyond CURRENT_CHAR in LIST
- is in the middle of a character, true otherwise. To do this, we must
- add up all the box counts for characters starting at FIRST_CHAR,
- until we see where we land. */
-
- boolean
- box_at_char_boundary_p (image_char_list_type list, unsigned current_char,
- unsigned box_count)
- {
- unsigned count = 0;
-
- while (count < box_count && current_char < IMAGE_CHAR_LIST_LENGTH (list))
- {
- image_char_type c = IMAGE_CHAR (list, current_char);
- count += IMAGE_CHAR_BB_COUNT (c);
- current_char++;
- }
-
- return count == box_count;
- }
-